JP4315925B2 - Molding apparatus and molding method - Google Patents

Description

  The present invention relates to a molding apparatus and a molding method, in particular, a molded product having a thin portion that is not filled with a molding material or difficult to fill in a normal molding, and does not require a special molding machine or apparatus, and is formed on the mold surface. The present invention relates to a molding apparatus and a molding method capable of transferring a shape with high accuracy and efficiently molding the shape.

  In general, when molding a molded product having a thin portion, the molding material tends to be filled first from a portion other than the thin portion due to its flow resistance, and the filling timing tends to be delayed in the thin portion. For this reason, short-circuits where the molding material is not completely filled into the thin part, weld lines where the molding material that has been shunted to the part other than the thin part merges again at the thin part, and other problems such as gas burns and imperfect transfer of the mold surface shape, etc. Molding defects are likely to occur in thin parts. These molding defects have been the main cause of not only deteriorating the design of the product appearance but also reducing the strength of the product itself.

  Therefore, in order to reduce the flow resistance difference of the molding material due to the thickness difference of the molded product, the volume of the cavity formed by the fixed side mold and the movable side mold is set larger than the volume of the molded product. Before the molten resin is injected and the resin in the cavity is solidified, the core mold part that forms a part of the movable mold is advanced, and the volume of the cavity is reduced to a size suitable for the shape of the molded product. A technique has been proposed in which an electric servomotor for compression is used as a forward / backward drive source for a mold part, and molding is performed by a molding machine configured to transmit the driving force to a core mold part via a toggle link mechanism (for example, , See Patent Document 1).

  According to this technique, since the injection is performed in a state where the volume of the cavity is set larger than the volume of the molded product, even in the case of a molded product having a very thin portion, it can be filled with a low injection pressure. In addition, a compression servo motor is used as a compression drive source, and the drive force is transmitted to the core mold part via a toggle link mechanism. In addition, it is said that the position of the core mold part can be accurately controlled by a compression servo motor. However, since this technique requires a molding machine having such a special function, there is a problem that molding cannot be performed by a general-purpose molding machine.

  On the other hand, a hydraulic mechanism for moving the core mold part, that is, the insert back and forth in the molding die is provided on the back of the insert, and the insert is retracted in advance to widen the gap between the cavities. A technique for driving the mechanism to advance the insert and compressing the filled resin in the plate thickness direction has also been proposed (for example, see Patent Document 2).

  According to this technique, it is not necessary to introduce a special molding machine and mold, and it can be molded by a general-purpose molding machine. However, separately from the molding machine and the mold, a hose and control valves for connecting the hydraulic source and the hydraulic mechanism for operating the hydraulic mechanism are required. Further, when the hose connecting the hydraulic source and the hydraulic mechanism is long, a time lag occurs in the operation of the hydraulic mechanism, and it is difficult to compress the resin in a timely manner. In addition, since the oil used is volume-compressed, there is a problem that it is difficult to ensure the positional accuracy of the hydraulic mechanism. In addition, oil leakage and the like occur in some cases and cause a contamination of the molding environment, and are difficult to apply to optical components such as lenses.

JP-A-9-267367 Japanese Patent Laid-Open No. 7-241891

  The present invention has been made in view of the above circumstances, and a molded product having a thin-walled portion which is not filled with a molding material or difficult to fill in normal molding without requiring a special molding machine or apparatus. An object of the present invention is to provide a technique that can be molded accurately and efficiently.

  The molding apparatus according to the present invention has a movable molding block member that constitutes a part of a molding component that is filled with a molding material to mold a molded product, and the molding is performed by moving the molding block member. A molding apparatus main body that compresses a part of the molding material filled in the structural member to a desired thickness, and increases the force from the operating member and transmits the force to the molding block member to drive the molding block member. An actuator is provided on the molding apparatus main body.

  In the molding method according to the present invention, when the molded product is molded by the molding apparatus main body having the molding component for molding the molded product by filling the molding material, the molding apparatus main body is filled with or after the molding material is filled. The actuator provided is used to drive the molding block member by increasing the external force and transmitting it to the molding block member constituting a part of the molding component, and by moving the molding block member A part of the molding material filled in the molding component is compressed to a desired thickness.

  According to the present invention, it is possible to accurately and efficiently form a molded product having a thin portion that is not filled with a molding material or difficult to fill in normal molding without requiring a special molding machine or apparatus. it can.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing an overview of a molded product according to Embodiment 1. FIG. FIG. 2A is a top view showing the solidified molding material released from the molding die in the first embodiment. FIG. 2B is a cross-sectional view taken along line IIb-IIb in FIG. FIG. 3 is a cross-sectional view showing a molding die and a molding mechanism in the first embodiment. FIG. 4 is a cross-sectional view showing details of the forming mechanism in the first embodiment. FIG. 5 is a process cross-sectional view illustrating the molding method in the first embodiment.

In FIG. 1, a molded product 10 is a box-shaped molded product made of a polycarbonate resin (hereinafter referred to as a PC resin) as a molding material and composed of a bottom surface portion 4 and a side surface portion 5. The bottom surface portion 4 has a thin portion 1 that is not filled or difficult to fill in normal molding, and this portion 1 is a compression portion (hereinafter referred to as a compression portion) formed by compression during the molding process. 1).
Further, in order to preferentially fill the compression site 1 with the molding material from the cavity inlet 6 as the molding material flow CV1, the guide channel 2 to the compression site 1 that is thicker than the other sites, and the compressed molding material In order to preferentially discharge from the compression portion 1 to the cavity outlet 7 as the molding material flow CV2, the guide passage 3 from the compression portion 1 is made thicker than the other portions.

2 is a plan view showing a part of the molding material solidified body 11 released from the molding die according to Embodiment 1 of the present invention, FIG. 2 (a) is a top view, and FIG. 2 (b) is IIb. It is sectional drawing in the -IIb line.
The molding material solidified body 11 includes a molded article 10, an overflow solidified body 8, and a molding material flow path solidified body 9 for connecting them. 1 is cut from the molding material flow path solidified body 9 at a cutting position A near the cavity inlet and a cutting position B near the cavity outlet.

FIG. 3 is a cross-sectional view showing a molding die and a molding mechanism according to Embodiment 1 of the present invention.
In FIG. 3, the molding die 50 is composed of a first die 51 and a second die 52 with the abutting surface D as a boundary.
The first mold 51 fixed by the first mold fixing platen 41 includes a mold inlet 53 of a melt molding material and a first molding material flow path 54 extending from the mold inlet 53 to the abutting surface D. Is arranged.
Further, a cavity 57 a that defines the outside of the bottom surface portion 4 of the molded product 10 is formed on the abutting surface D of the first die 51.
On the other hand, the second mold 52 fixed by the second mold fixing platen 42 has, on the abutting surface D, the second molding material channel 55, the side surface portion 5 and the bottom surface portion 4 of the molded product 10. A cavity 57b that defines the inside, a third molding material flow path 59, and an overflow 60 are formed.
In addition, the cavity block 64 which forms the inner side of the compression site | part 1 among the bottom face parts 4 of the molded article 10 is integrated in the 2nd type | mold 52, and comprises a part of cavity 57b.

By bringing the first mold 51 and the second mold 52 formed as described above into close contact with each other at the abutting surface D, the first molding material flow path 54 and the second molding are formed from the mold inlet 53. The material channel 55, the cavity inlet 56, the cavity 57, the cavity outlet 58, the third molding material channel 59, and the overflow 60 are connected in series to form a channel filled with the molding material.
Moreover, the cavity 57a which prescribes | regulates the external shape of the molded article 10 is comprised by uniting the cavities 57a and 57b.

However, the cavity block 64 is slidable in the direction of compressing the cavity 57 in order to compress the compression portion 1 during the molding process, and is advanced by the molding mechanism 20 described in detail later. The cavity block return spring 65 is retracted to the initial position.
The initial position of the cavity block 64 is defined at a position where the thickness of the compression portion 1 is equivalent to the guide passage 2 to the compression portion 1 and the guide passage 3 from the compression portion. This is not the case as long as the molding material can be sufficiently filled in the state.
And in this embodiment, although the compression site | part 1 is planar shape, a shape is not specifically limited.

In addition, the second mold 52 is provided with a flow path for discharging gas inside the flow path filled with the molding material and inside the cavity, and the second mold 52 is connected to the second discharge port 61 from the gas discharge port 61 at the end of the overflow 60. A gas discharge path 62 communicating with the suction device attachment port 63 on the side surface of the mold 52 is disposed.
The second mold 52 is also provided with a mechanism for releasing the molded product 10, the molding material flow path solidified body 9, and the overflow solidified body 8 (see FIG. 2) from the molding die 50. At the time of mold release, mold release pins 66 for projecting the respective solidified bodies are inserted into the second mold 52 at the end portion of the first molding material flow path 54 and the position of the overflow 60, The root portion is connected to the release plate 67 and is configured to be driven integrally.
As will be described in detail later, in this embodiment, as a drive source for the release pin 66 and the release plate 67, a molding attached to a molding machine provided with a molding apparatus main body MA composed of a molding die 50 and a molding mechanism 20. Although a product release mechanism is used, for example, a power source such as an air cylinder, a hydraulic cylinder, or a motor may be used.

  Here, the material of the first mold 51 and the second mold 52 is not particularly limited. For example, alloy tool steel for cold mold (SKD-11), stainless steel (SUS-420, SUS-440), In addition to steel materials such as structural carbon steel (S50C, S55C), non-ferrous metals such as copper and aluminum, alloys thereof, and inorganic materials such as ceramics are used.

FIG. 4 is a sectional view showing details of the molding mechanism according to Embodiment 1 of the present invention.
The molding mechanism 20 includes a fixed base 38 that holds a second mold 52 (see FIG. 3), an actuator 21, a heat insulating plate 33, and a temperature adjustment device 34. The fixed base 38 is attached to a second mold fixing plate 42 (see FIG. 3) attached to the molding machine on one side, and fastened to the second mold 52 on the other side with bolts or the like.
A hole through which the second release rod 44 (see FIG. 3) of the molded product release mechanism attached to the molding machine provided with the molding apparatus main body MA including the molding die 50 and the molding mechanism 20 is passed through the fixed base 38. 32 is provided. A heat insulating plate 33 is provided between the fixed base 38 and the second mold fixing plate 42 (see FIG. 3) and between the fixed base 38 and the second mold 52 for the purpose of suppressing the inflow and outflow of the respective heat. It has been.
Further, in order to maintain the temperature of the forming mechanism 20 at a set temperature, a temperature adjusting device 34 is provided, and is connected to a medium supply device (not shown) provided outside the forming mechanism 20. The temperature adjustment circuit is configured. This medium supply device has a function of maintaining the temperature of water at a set temperature. Therefore, water as a temperature adjustment medium is circulated from the medium supply device to the temperature adjustment circuit, and the molding mechanism 20 is held at the set temperature.
In this embodiment, water controlled to the set temperature is circulated through the temperature adjusting device 34, but a medium other than water may be circulated, or an electric heater or the like may be inserted.
The actuator 21 includes an operating rod 22 that receives an external force, a pressure receiving rod 24 having a cross-sectional area larger than that of the operating lot 22, a transmission rod 23 that is connected to the pressure receiving rod 24 and transmits the force to the cavity block 64. An actuator housing 27 that covers and holds the rods 22, 24, and 23, and a pressure transmission unit 25 that seals a fluid medium in a sealed space defined between the actuator housing 27, the actuation rod 22, and the pressure receiving rod 24. And a packing 26 for maintaining hermeticity in the pressure transmission unit 25, and a return rod for retracting the operating rod 22, the pressure receiving rod 24 and the pressure receiving lot 24 to the initial position after the operation is completed. Air escape for allowing the springs 28 and 29 and the air in the space 37 in the actuator housing to communicate with the outside of the actuator housing. And a groove 31.

Here, the function and operation of each component of the actuator 21 will be described. The operating rod 22 receives the driving force of the first release rod 43 of the molded product release mechanism attached to the molding machine, and transmits it to the pressure transmission unit 25. The pressure transmission unit 25 is filled with machine oil, and pressure is generated by dividing the driving force of the first release rod 43 by the projected area of the transmission surface 35 where the operation lot 22 and the pressure transmission unit 25 are in contact. The pressure receiving rod 24 has a protrusion 30 on the pressure receiving surface 36 that is in contact with the pressure transmitting portion 25, so that a machine oil in the pressure transmitting portion 25 spreads over the entire pressure receiving surface 36 by creating a gap with the actuator housing 27. It has become. By receiving the pressure of the pressure transmission unit 25 by the pressure receiving surface 36, a force is generated by multiplying the pressure of the pressure transmission unit 25 and the projected area of the pressure receiving surface 36, and the pressure receiving rod 24 and the transmission rod 23 move forward together. . At the same time, the transmission rod 23 drives the cavity block 64.
Therefore, the actuator 21 can drive the cavity block with a force doubled by the ratio of the projected area of the transmission surface 35 to the pressure receiving surface 36 even with a limited force of the molded product release mechanism attached to the molding machine.
When the actuator 21 is driven, the air in the space 37 in the actuator housing 27 is compressed and becomes a resistance to the forward movement of the transmission rod 23. Therefore, the air escape groove 31 for communicating the space 37 outside the actuator housing. Is provided. When the first release rod 43 of the molded product release mechanism attached to the molding machine is retracted to the initial position, the respective rods 22, 23, 24 are retracted to the initial position by the return springs 28, 29.

  The materials for the fixing base 38, the heat insulating plate 33, and the actuator 21 of the forming mechanism 20 are not particularly limited. Further, the fluid medium of the pressure transmission unit 25 is not particularly limited, but is preferably an incompressible medium.

  Next, a method of molding the molded product 10 using the molding mechanism 20 and the molding die 50 configured as described above will be described with reference to FIG. In addition, FIG. 5 is process sectional drawing explaining the shaping | molding method which concerns on Embodiment 1 of this invention.

First, the first mold 51 and the second mold 52 are brought into close contact with each other at the abutting surface D to obtain the state shown in FIG. 5A (mold closing step). An electromagnetic valve 69, a buffer tank 70, and a vacuum pump 71 are connected to the suction device attachment port 63 of the second mold 52 via a suction hose 72. When the first mold 51 and the second mold 52 are in close contact with each other, a signal indicating that the mold closing process has been completed is sent from the molding machine to the electromagnetic valve, and the electromagnetic valve is immediately opened. Then, the flow paths 53 to 56 and 58 to 60 filled with the molding material and the gas in the cavity 57 are immediately sucked and discharged.
Here, although not shown in the figure, the first die 51 and the second die 52 are provided with temperature adjusting devices, and a medium supply device (not shown) provided outside the molding die 50. ) To form a temperature adjustment circuit. This medium supply device has a function of maintaining the temperature of water at a set temperature. Therefore, water as a temperature adjustment medium is circulated from the medium supply device to the temperature adjustment circuit, and the first mold 51 and the second mold 52 are held at the set temperatures. As described above, the temperature adjusting device 34 provided in the molding mechanism 20 also forms a similar temperature adjusting circuit and is held at a set temperature.

  Here, the temperature adjusting devices disposed in the molding die 50 and the molding mechanism 20 do not necessarily need to be connected to each dedicated medium supply device, and may be connected to the same medium supply device. Moreover, when connected to the same medium supply apparatus, each temperature control apparatus may be connected in series, and may be connected in parallel.

  Next, the molding material obtained by heating and melting the PC resin is injected from the molding material injection device 40 of the molding machine into the mold inlet 53. As shown in FIG. 5B, the melt molding material 12 flows from the mold inlet 53 into the second molding material channel 55 via the first molding material channel 54 and from the cavity 56 inlet to the cavity. 57 is filled (filling step). The molten molding material 12 that has passed through the cavity inlet 56 is filled while spreading over the entire cavity 57, but in particular flows preferentially through the guide channel 2 to the compression site and fills the compression site 1.

Then, while the melt molding material 12 is filling the compression part 1, the cavity block 64 is advanced and compressed until the compression part 1 has a predetermined thickness as shown in FIG. Process).
In this compression process, first, a molded product release mechanism attached to the molding machine is operated. When the molded product release mechanism is activated, the first release rod 43 is driven, and the actuation rod 22 of the actuator 21 receives the driving force. As described above in the description of FIG. 4, the driving force of the actuator 21 is doubled by the force obtained by multiplying the projected area ratio of the transmission surface 35 with respect to the pressure receiving surface 36 and is transmitted to the transmission rod 23. Then, the transmission rod 23 advances the cavity block 64 with increased force. Further, in order to advance the cavity block 64 to a predetermined position, it is necessary to drive the first release rod 43 by the stroke amount obtained by multiplying the stroke amount by the projected area ratio of the transmission surface 35 to the pressure receiving surface 36. The stroke amount is accurately controlled by the molding machine. Moreover, the timing at which this compression process is started monitors the injection amount of the molding material injection device 40 of the molding machine, and when a preset amount of the melt molding material 12 is injected, the molding product of the molding machine The release mechanism works. Thereby, since the filling and compression of the melt molding material 12 are performed by the same control in the molding machine, there is an advantage that it can be controlled instantly with good timing.
The compression stroke amount of the cavity block 64 is defined by the stroke of the first release rod 43 of the molding machine, but a stopper is provided on the sliding portion of the cavity block 64 so that the mold cavity block 64 has a predetermined amount. You may make it stop, if it advances to a position.

  However, in this embodiment, the molded product release mechanism attached to the molding machine has a structure in which when the first release rod 43 is driven, the second release rod 44 is also driven integrally. Therefore, the projected area ratio of the transmission surface 35 to the pressure receiving surface 36 between the second release rod 44 and the release plate 67 in advance is the driving amount of the first release rod 43, that is, the stroke amount of the cavity block 64. A gap is provided for a distance multiplied by. Therefore, after the compression process is completed, there is no gap between the second release rod 44 and the release plate 67.

  Next, the compressed melt molding material 12 is pushed to an unfilled portion in the cavity 57. The molten molding material surplus with respect to the volume of the cavity 57 passes through the cavity outlet 58 and is discharged to the overflow 60 through the third molding material channel 59. At that time, since the guide flow path 3 from the compression site is provided toward the cavity outlet 7, the melt molding material 12 is discharged without difficulty and the load of the compression force by the cavity block 64 is suppressed.

  Then, as shown in FIG. 5D, after the melt molding material 12 is completely filled in the cavity 57, the injection from the mold inlet 53 is continued at a constant pressure for a certain time (pressure-holding step). By this pressure holding step, the solidification shrinkage of the melt molding material 12 in the cavity 57 is replenished. Next, after completion of the pressure holding process, the mold is continuously cooled in the mold until the melt molding material 12 is solidified and the shape of the cavity 57 can be maintained (cooling process).

  Then, as shown in FIG. 5E, the first mold 51 and the second mold 52 are separated from the abutting surface D (mold opening process). At this time, the molding material solidified body 11 remains in the second mold 52 having a high mold release resistance.

Next, as shown in FIG. 5 (f), the molding material solidified body 11 is released from the second mold 52 (release process). In this release step, first, the first release rod 43 and the second rod 44 of the molded product release mechanism are driven again.
As described above, there is no gap between the second release rod 44 and the release plate 67 immediately before the release step. When the first release rod 43 is driven, the compression part 1 protrudes through the actuator 21 and the cavity block 64. Further, when the second release rod 44 is driven, the end portion of the first molding material flow channel 54 and the overflow 60 protrude through the release plate 67 and the release pin 66. Thereby, the molding material solidified body 11 and the 2nd type | mold 52 are isolated.
For the reason described above, the speed at which the cavity block 64 advances is slower than the speed at which the first release rod 43 advances, and the speed of the release pin 66 that advances together with the release rod. Slower than. Therefore, the cavity block 64 contributes to the protrusion of the molding material solidified body 11 only immediately after the mold release process is started, but is effective in relieving the close contact between the compression site 1 and the cavity block 64.

  Then, after the molding material solidified body 11 is taken out from the molding die 50, the first release rod 43 and the second release rod 44 of the molded product release mechanism are retracted to the initial position. At the same time, the cavity block 64, the release pin 66, and the release plate 67 are retracted to the initial positions by the return springs 65 and 68. Further, the operating rod 22 and the transmission rod 23 of the actuator 21 are also retracted to the initial positions by the built-in return springs 28 and 29. Thereafter, the first die 51 and the second die 52 are brought into close contact with each other again at the abutting surface D to obtain the state shown in FIG. 5A (die closing step), and the process proceeds to the next molding cycle.

  Next, molding conditions in this molding method will be described. It is desirable that the temperature of the molding die be as high as possible so as to ensure good fluidity of the melt molding material 12 in the filling step and to apply a predetermined pressure to the melt molding material 12 in the cavity 57 in the pressure holding step. However, if the temperature of the molding die is set too high, the solidified molding material 11 is not sufficiently cooled in the cooling process, so that the time for the cooling process is extended or a problem occurs during mold release. In particular, at the time of mold release, the molding material solidified body 11 is protruded by the cavity block 64 and the mold release pin 66, so that the molding material solidified body 11 is damaged or the worst breakthrough occurs. Therefore, in order to suppress the occurrence of these problems and ensure the fluidity and releasability of the melt molding material 12, it is necessary to set the upper limit value of the mold temperature according to the molding material. In this embodiment, since the PC resin is used as the molding material, the upper limit value of the mold temperature is about 418K (Kelvin).

  In general, when a crystalline resin typified by polyamide resin (PA resin), polyacetal resin (POM resin), or polyphenylene sulfide resin (PPS resin) is used as a molding material, In addition to the value, there is also a lower limit. That is, in the crystalline resin, there is a maximum crystallinity (saturated crystallinity) that crystallization does not proceed any more. When the crystallinity of the molded product does not reach the saturation crystallinity, crystal distortion increases. And this crystal distortion acts as internal stress, and reduces dimensional accuracy. Therefore, in order to obtain a molded product with high dimensional accuracy, it is necessary to make the crystallinity of the molded product reach the saturation crystallinity during the molding process. For example, in the case of PPS resin, when the mold temperature is 403K or higher, the saturation crystallinity is reached. Since the PC resin is an amorphous resin, that is, does not have a crystal structure, the lower limit of the mold temperature is not particularly limited.

  However, if the mold temperature becomes too low, the temperature of the melt molding material 12 decreases during filling into the molding mold, solidifies before completely filling the cavity, and the flow of the melt molding material 12 Will stop. When PC resin is used as the molding material, it is generally desirable to set the mold temperature to 353 K or higher in order to ensure sufficient fluidity in the molding mold.

  For this reason, when PC resin is used as the molding material, it is generally desirable to set the temperature of the molding die to a temperature range of 353K to 418K. In this embodiment, it is set to 418K in consideration of fluidity to a thin portion.

  Further, since the PC resin is an amorphous resin, it does not have a clear melting point, but it has fluidity when heated to about 503 K to 533 K or more. And PC resin shows the tendency for a viscosity to fall and fluidity | liquidity to improve, so that it is a high temperature state. However, if heated too much, the PC resin may be discolored or burnt by heat, and in some cases may decompose and deteriorate the material, so the upper limit of the heating temperature is about 633K. On the other hand, when the heating temperature is lower than 543K, the PC resin is solidified while flowing in the molding die and causes defects such as being unable to fill in the cavity 57 and not forming the shape of the cavity 57 completely. There is a fear. Therefore, in order to ensure good fluidity, it is desirable to heat the PC resin to 543K to 633K. In this embodiment, the PC resin was melted at 573K.

  Further, molding conditions such as filling speed, compression speed, holding pressure, holding time, and cooling time are determined so that the shape and dimensions of the molded product are good.

  The temperature of the molding mechanism 20 is not particularly defined because it does not directly affect the shape and dimensions of the molded product. That is, the heat insulating plate 33 and the temperature adjusting device 34 are not necessarily required depending on molding, and are provided as appropriate. However, it is desirable to keep the temperature as constant as possible since there is a risk that the operation of the drive component may be hindered due to expansion of the drive component due to heat. Therefore, in this embodiment, the temperature of the forming mechanism 20 is set to 353 K in order to ensure a good operation of the driving component.

  As described above, according to the molding mechanism 20 according to the first embodiment of the present invention, the cavity thickness that can be filled in advance even in the molded product 10 having the thin portion 1 that is not filled with the molding material or difficult to fill in the normal molding. Thus, the cavity block 64 is moved backward, and the cavity block 64 is advanced by the actuator 21 provided in the molding mechanism 20 while the melt molding material 12 is filling the compression site 1. Compress until 1 reaches a predetermined thickness. Thereby, even the molded product 10 having the thin portion 1 that is difficult to perform by normal molding can be efficiently molded by a general-purpose molding machine.

  The cavity block 64 is also multiplied by the force doubled by the projected area ratio of the transmission surface 35 to the pressure receiving surface 36 by the actuator 21 provided in the molding mechanism 20 even with the limited force of the molded product release mechanism attached to the molding machine. Can be driven. Accordingly, it is not necessary to prepare a hydraulic device or the like separately from the molding machine, and it is possible to eliminate the cause of contamination of the molding environment such as oil leakage. Moreover, the same effect can be obtained with a general-purpose molding machine without using a special molding machine equipped with a molded product release mechanism capable of generating a large force.

  Further, in order to advance the cavity block 64 to a predetermined position, it is necessary to drive the first release rod 43 by the stroke amount obtained by multiplying the stroke amount by the projected area ratio of the transmission surface 35 to the pressure receiving surface 36. However, this stroke amount is accurately controlled by the molding machine. Thereby, the thickness of the compression site | part 1 can be shape | molded with the outstanding precision.

  In addition, the timing at which the compression part 1 starts to be compressed is monitored by the injection amount of the molding material injection device 40 of the molding machine, and when a preset amount of molten molding material is injected, the molding product separation of the molding machine is started. The mold mechanism works. Thereby, since the filling and compression of the melt molding material 12 are performed by the same control in the molding machine, it can be instantly controlled with good timing.

  In addition, according to the molding die according to the first embodiment of the present invention, since the overflow 60 communicating with the cavity 57 is provided around the cavity 57, the molten molding material 12 remaining by the compression is pushed to the overflow 60. Thus, the molten molding material 12 can be compressed without difficulty, and the load on the cavity block 64, the actuator 21, and the molded product release mechanism 43 can be reduced.

  Furthermore, by providing a gas discharge port 61 at the end of the overflow 60 and providing a mechanism for discharging the gas in the cavity 57 by the vacuum pump 71, the load for compressing the gas confined in the cavity 57 is suppressed, Further, generation of gas burn can be suppressed and the shape of the mold surface can be transferred with high accuracy.

  In addition, according to the molded article according to the first embodiment of the present invention, the molding material that is thicker than other parts between the cavity inlet 6 and the compression part 1 and between the compression part 1 and the cavity outlet 7 is guided. By providing the flow paths 2 and 3, the molding material that is not normally filled or that is difficult to fill is actively filled with the melt molding material, so that the molding material that is incompletely filled so-called short-circuiting or from other than the thin wall Can prevent the weld line generated by rejoining. Further, since the compressed melt molding material 12 can be actively pushed to the overflow 8, the load on the cavity block 64, the actuator 21 and the molded product release mechanism 43 can be reduced.

  According to the first embodiment of the present invention, a movable molding comprising a cavity block 64 that constitutes a part of a molding component constituted by a molding die 50 filled with a molding material to mold a molded product. A molding metal that has a block member and compresses a part of the molding material filled in the molding component constituted by the molding die 50 to a desired thickness by moving the molding block member composed of the cavity block 64 The cavity block is provided with a molding apparatus main body MA composed of a molding structure composed of a mold 50 and a molding mechanism 20, and increases the force from an actuating member consisting of an actuating rod 22 connected to a first release rod 43. The molding component constituted by the molding die 50 and the component 21 are connected to the actuator 21 for transmitting to the molding block member 64 and driving the molding block member. Since the molding apparatus main body MA including the mechanism 20 is provided, a molding product having a thin portion that is not filled with a molding material or difficult to fill in a normal molding can be obtained without using a special molding machine or apparatus. A molding apparatus capable of accurately transferring the shape of the surface and molding the surface can be obtained.

  Further, according to the first embodiment of the present invention, in the configuration of the preceding paragraph, an operation member including the operation rod 22 connected to the first release rod 43 and receiving an external force, and an operation including the operation rod 22. A pressure receiving member comprising a pressure receiving rod 24 having a larger cross-sectional area than the member; a transmission member comprising a transmission rod 23 connected to the pressure receiving member comprising the pressure receiving rod 24 and transmitting force to the molding block member comprising the cavity block 64; An actuator housing 27 that covers and holds the operating member composed of the operating rod 22, the pressure receiving member composed of the pressure receiving rod 24, and the transmitting member composed of the transmitting rod 23, the operating member composed of the actuator housing 27 and the operating rod 22, and Incompressible fluid or the like in a sealed space defined between the pressure receiving members including the pressure receiving rod 24 It consists of a pressure transmission part 25 in which a fluid medium is sealed, a sealing member made up of a packing 26 for maintaining the hermeticity in the pressure transmission part 25, an actuating member made up of the actuating rod 22, and the pressure receiving rod 24. Return springs 28 and 29 for retracting the transmission member made of the transmission rod 23 connected to the pressure receiving member made of the pressure receiving member and the pressure receiving rod 24 to the initial position after the operation is completed, and a space in the actuator housing 27. An actuator 21 constituted by an air escape passage made up of an air escape groove 31 for communicating air outside the actuator housing is used as a molding apparatus body made up of the molding structure constituted by the molding die 50 and the molding mechanism 20. Because it is provided, a molded product that has a thin-walled portion that is not filled with a molding material or is difficult to fill in normal molding. Without requiring Do molding machine or device, the shape of the mold surface accurately transcribed efficiently, it is possible to obtain a molding apparatus can be molded in a smooth operation.

  Furthermore, according to the first embodiment of the present invention, in the configuration of the preceding item or the preceding item, the molded product interlocked with the molding apparatus main body MA including the molding structure constituted by the molding die 50 and the molding mechanism 20. The actuator 21 is operated in conjunction with the molding process by the molding apparatus main body MA including the molding structure 50 and the molding mechanism 20 by the mold release mechanism. A molded product that has a thin portion that is not filled with material or difficult to fill can be molded efficiently without the need for a special molding machine or device, and the shape of the mold surface can be accurately transferred. The cavity block can be driven with good timing and position accuracy in conjunction with the molding process, and it is not necessary to introduce hydraulic pressure from the outside. , It is possible to obtain a molding apparatus capable of eliminating the cause of contamination of the oil leakage or the like forming environment.

  According to the first embodiment of the present invention, in the structure according to any one of the preceding three items, the molding structure comprising the cavity block 64 that is pressurized by the movement of the molding block member comprising the cavity block 64. Since the cavity outlet 58 for overflowing the molding material filled into the molding die 50 is provided in the molding component constituted by the molding die 50, the thin portion that is not filled with the molding material in normal molding or is difficult to fill. The molding surface can be molded efficiently by accurately transferring the shape of the mold surface without the need for a special molding machine or equipment, and the compressed molding material is overflowed. The material can be compressed without difficulty, and the molding block member consisting of the cavity block, the actuator and the molded product It is possible to obtain a molding apparatus capable of reducing the load on the mechanism.

  Still further, according to the first embodiment of the present invention, in the configuration of the preceding paragraph, the molding configuration constituted by the molding die 50 from the end portion of the molding material flowing out by the overflow operation through the cavity outlet 58. Since a molding passage composed of the molding die 50 is provided with a discharge passage composed of a discharge port 61 and a gas discharge passage 62 for discharging gas in the body, the molding material is not filled or filled in normal molding. A molded product with a difficult-to-thin part can be efficiently molded by accurately transferring the shape of the mold surface without the need for a special molding machine or equipment, and the compressed molding material can be overflowed. Therefore, the molding material can be compressed without difficulty, and the molding block member consisting of the cavity block, the actuator, and the molded product release mechanism This load can be reduced, and the same effect can be obtained by providing a mechanism for discharging the gas in the molding structure consisting of cavities from the end of the overflow. A molding apparatus that can accurately transfer the shape of the surface can be obtained.

  In addition, according to the first embodiment of the present invention, the movable body is made of the cavity block 64 that constitutes a part of the molding structure constituted by the molding die 50 that fills the molding material and molds the molded product. A part of the molding material filled in the molding component constituted by the molding die 50 is compressed to a desired thickness by moving the molding block member composed of the cavity block 64. A molding apparatus body MA composed of a molding component 50 and a molding mechanism 20, and a force from an actuating member consisting of an actuating rod 22 connected to the first release rod 43 is increased. A molding structure constituted by the molding die 50 includes an actuator 21 that transmits to the molding block member composed of the cavity block 64 and drives the molding block member. Of the portion 1 to be compressed to a desired thickness from the portion of the inflow port 6 that is provided in the molding apparatus body MA composed of the body and the molding mechanism 20 and is filled with the molding material into the molding structure constituted by the molding die 50 Since the guide passages 3 and 4 of the molding material that are thicker than other parts are provided between the outlets 7 that perform the overflow operation of the molding material from the part 1 that is compressed to a desired thickness, ordinarily, The molding surface is not filled with molding material, or molded products with thin parts that are difficult to fill can be molded efficiently by accurately transferring the shape of the mold surface without requiring a special molding machine or equipment. In addition, it is possible to positively fill the molding material in a part that is not normally filled or difficult to fill, and to re-join the molding material that has come around from a part other than incomplete filling so-called short or thin wall. The weld line that occurs can be prevented, and the compressed molding material can be actively pushed to the overflow portion, so that a molding apparatus that can perform molding while reducing the load on the cavity block and the actuator can be obtained. .

  Furthermore, according to the first embodiment of the present invention, a molding comprising a molding die 50 and a molding mechanism 20 having a molding component constituted by a molding die 50 for molding a molded product by filling a molding material. When molding a molded product by the apparatus main body MA, an external force is increased by an actuator 21 provided in the molding apparatus main body MA including the molding die 50 and the molding mechanism 20 during or after the filling of the molding material. The molding block member comprising the cavity block 64 is driven by transmitting to the molding block member comprising the cavity block 64 that constitutes a part of the molding component comprising the molding die 50, and the cavity block 64, the molding block constituted by the molding die 50 is filled by moving the molding block member 64. Since it has a compression process for compressing a part of the material to a desired thickness, a molded product having a thin part that is not filled with a molding material or difficult to fill in a normal molding can be obtained by using a special molding machine or Without requiring an apparatus, it is possible to obtain a molding method capable of transferring the shape of the mold surface with high accuracy and molding efficiently.

  Still further, according to the first embodiment of the present invention, the molding comprising the molding die 50 and the molding mechanism 20 having the molding component constituted by the molding die 50 filled with the molding material and molding the molded product. The molding die is molded by the apparatus main body MA, and an external force is increased by an actuator 21 provided in the molding apparatus main body MA including the molding die 50 and the molding mechanism 20 during or after filling of the molding material. The molding block member composed of the cavity block 64 is driven by transmitting to the molding block member composed of the cavity block 64 constituting a part of the molding component composed of 50, and the molding composed of the cavity block 64 is performed. A part of the molding material filled in the molding structure constituted by the molding die 50 is moved by moving the block member for molding. To a desired thickness from a portion of the molded product corresponding to the inlet 6 that fills the molding component constituted by the molding die 50 with a molding material. Between the parts 1 to be compressed or between the parts 1 to be compressed to a desired thickness and between the parts of the molded product corresponding to the outlet 7 for causing the overflow operation of the molding material, Since the thickened part of the molded product corresponding to the guide channels 3 and 4 is provided, a special molding machine or device is used to form a molded product having a thin portion that is not filled with a molding material or difficult to fill in normal molding. It is possible to transfer the shape of the mold surface accurately and efficiently without needing it. In addition, the molding material is actively filled in a portion that is not normally filled or difficult to fill, so that incomplete filling is so-called short. And other than thin-walled The weld line generated by rejoining the molding material that wraps around from the part can be prevented, and the compressed molding material can be actively pushed to the overflow part, so the load on the cavity block and actuator It is possible to obtain a molded product that can be molded while reducing the above.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a perspective view showing an overview of a molded product according to the second embodiment. FIG. 7A is a top view showing the solidified molding material released from the molding die in the second embodiment. FIG.7 (b) is sectional drawing in the VIIb-VIIb line | wire of Fig.7 (a). FIG. 8 is a cross-sectional view showing a molding die and a molding apparatus in the second embodiment. FIG. 9 is a process cross-sectional view illustrating the molding method in the second embodiment.

  In FIG. 6, a molded product 10 is a box-shaped molded product made of a PC resin as a molding material and composed of a bottom surface portion 4 and a side surface portion 5. The bottom surface portion 4 has a thin portion 1 that is not filled or difficult to fill in normal molding, and is a compression portion that is formed by compression during the molding process. Then, in order to preferentially fill the melt molding material 12 from the cavity inlet 6 to the compression site 1, a slit-like barrier is provided at a site where the melt molding material 12 flows from the cavity inlet 6 to the side surface portion 5, thereby 13 is provided. Further, in order to preferentially discharge the melt molding material 12 compressed at the compression site 1 from the compression site 1 to the cavity outlet 7, a slit-like barrier is inserted at a site where the side part 5 flows into the cavity inlet, A second throttle channel 14 is provided.

  7 is a plan view showing a part of the molding material solidified body 11 released from the molding die in the second embodiment of the present invention, FIG. 7 (a) is a top view, and FIG. 7 (b) is a diagram. It is sectional drawing in the VIIb-VIIb line | wire of 7 (a). The molding material solidified body includes a molded article 10, an overflow solidified body 8, and a molding material flow path solidified body 9 for connecting them. The molded product 10 in FIG. 6 is cut from the molding material flow path solidified body 9 at a cutting position A near the cavity inlet and a cutting position B near the cavity outlet.

  FIG. 8 is a sectional view showing a molding die and a molding apparatus according to Embodiment 1 of the present invention. The first embodiment described above except that the air cylinder 39 mounted on the molding mechanism 20 is used as a drive source for the release pin 66 and the release plate 67 instead of the molded product release mechanism attached to the molding machine. It is configured in the same way.

  FIG. 9 is a process cross-sectional view illustrating a molding method according to Embodiment 2 of the present invention. 9F, the same process as in the first embodiment is performed except that the release pin 66 and the release plate 67 are driven by the air cylinder 39. Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

Thus, according to the molded product according to the second embodiment, the flow path leading from the cavity inlet 6 to the side surface portion 5 other than the compression site 1 or the side surface portion 5 other than the compression site 1 to the cavity outlet port 7. By providing the throttle channels 13 and 14 in the communicating channel, an effect equivalent to that of providing the guide channels 2 and 3 in the first embodiment can be obtained. Further, since it is only necessary to insert a slit-shaped barrier without providing a guide channel, there is an advantage that there is no great restriction on the shape of the molded product.
In the second embodiment, the throttle channels are provided at two locations 13, 13, but only the throttle channel 13 on the cavity inlet side may be used.

Further, according to the molding apparatus and the mold according to the second embodiment, the cavity block 64 and the drive source of the release pin 66 are separated, and the actuator 21 incorporated in the molding mechanism 20 is used as the drive source of the cavity block 64. As a drive source for the release pin 66, an air cylinder 39 built in the molding mechanism 20 is used. Thereby, the molded product release mechanism of the molding machine has only an operation at the time of compression, and does not require complicated control as in the first embodiment.
In the second embodiment, the air cylinder is used as the drive source for the release pin, but a hydraulic cylinder, a motor, or the like may be used as the drive source.

  According to the second embodiment of the present invention, a movable molding comprising a cavity block 64 that constitutes a part of a molding component constituted by a molding die 50 that is filled with a molding material to mold a molded product. A molding metal that has a block member and compresses a part of the molding material filled in the molding component constituted by the molding die 50 to a desired thickness by moving the molding block member composed of the cavity block 64 The cavity block is provided with a molding apparatus main body MA composed of a molding structure composed of a mold 50 and a molding mechanism 20, and increases the force from an actuating member consisting of an actuating rod 22 connected to a first release rod 43. The molding component constituted by the molding die 50 and the component 21 are connected to the actuator 21 for transmitting to the molding block member 64 and driving the molding block member. It is provided in the molding apparatus main body MA comprising the mechanism 20 and is compressed to a flow path leading to other than the portion 1 to be compressed to a desired thickness from the inlet 6 for filling the molding component with the molding material, or to the desired thickness. Since the flow passages 13 and 14 of the throttle are provided in the flow passage leading to the outflow port 7 for performing the overflow operation of the molding material from other than the portion 1 to perform, the molding material is not filled or difficult to fill in normal molding. The molded product having a part can be efficiently molded by accurately transferring the shape of the mold surface without the need for a special molding machine or apparatus, and it is usually not filled or difficult to fill. By actively filling the molding material, it is possible to prevent incomplete filling, so-called short-circuiting, and weld lines that occur when the molding material that wraps around from other parts than the thin wall rejoins. Also, the compressed molding material, since positively can sweep away the overflow portion, it is possible to obtain a molding apparatus capable of molding to reduce the load on the cavity block and the actuator.

  Further, according to the second embodiment of the present invention, a molding apparatus comprising a molding die 50 having a molding component constituted by a molding die 50 filled with a molding material and molding a molded product, and a molding mechanism 20. An external force is increased by the actuator 21 provided in the molding apparatus body MA composed of the molding die 50 and the molding mechanism 20 during or after filling with the molding material. The molding block member consisting of the cavity block 64 is driven by transmitting to the molding block member consisting of the cavity block 64 that constitutes a part of the molding component comprising: A part of the molding material filled in the molding structure constituted by the molding die 50 by moving the block member has a desired thickness. A molded product that is compressed to a molding, and corresponds to a flow path that extends from a portion of the molded product corresponding to the inlet 6 that fills the molding material to the molding component to a portion other than the portion 1 that is compressed to a desired thickness. The flow passages 13 and 14 of the throttles are formed in the portion of the molded product corresponding to the flow passage leading to the outlet 7 for performing the overflow operation of the molding material from the portion other than the portion 1 to be compressed to a desired thickness. Because the molding part corresponding to is provided, the molding surface is not filled with molding material in normal molding, or it has a thin part that is difficult to fill, without requiring a special molding machine or equipment. The shape of the material can be accurately transferred and molded efficiently, and the material that is not normally filled or hard to fill is actively filled with the molding material, so that it can be moved from the part other than incomplete filling, so-called short or thin wall Included As a result, the weld line generated by rejoining the molding material can be prevented, and the compressed molding material can be actively pushed to the overflow part, reducing the load on the cavity block and actuator. A molded product that can be molded can be obtained.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a perspective view showing an overview of a molded product in the third embodiment. FIG. 11A is a top view showing the solidified molding material released from the molding die in the third embodiment. FIG.11 (b) is sectional drawing in the XIb-XIb line | wire of Fig.11 (a). FIG. 12 is a cross-sectional view showing a molding die and a molding mechanism in the third embodiment.

In FIG. 10, a molded product 10 is a box-shaped molded product made of a PC resin as a molding material and configured by a bottom surface portion 4 and a side surface portion 5. The bottom surface portion 4 is provided with a thin convex portion 15 that is not filled or difficult to fill in normal molding, and this portion is a compression portion 1 that is formed by compression during the molding process.
Then, similarly to the molded product of the second embodiment shown in FIG. 6, a slit-like barrier is provided in a portion flowing from the cavity inlet 6 into the side surface portion 5, and a first throttle channel 13 is provided, so that a melt molding material is provided. 12 is preferentially filled from the cavity inlet 6 into the compression site 1. In addition, a slit-like barrier is also provided at a portion where the side portion 5 flows into the cavity inlet, and a second throttle channel 14 is provided so that the molten molding material 12 compressed at the compression portion 1 is allowed to flow from the compression portion 1 to the cavity flow. The outlet 7 is preferentially discharged.

11 is a plan view showing a part of the molding material solidified body 11 released from the molding die according to Embodiment 3 of the present invention, FIG. 11 (a) is a top view, and FIG. 11 (b) is a diagram. It is sectional drawing in the XIb-XIb line | wire of 11 (a).
The molding material solidified body includes a molded article 10, an overflow solidified body 8, and a molding material flow path solidified body 9 for connecting them. The molded article 10 in FIG. 10 is cut from the molding material flow path solidified body 9 at a cutting position A near the cavity inlet and a cutting position B near the cavity outlet.

  12 is a sectional view showing a molding die and a molding apparatus according to Embodiment 3 of the present invention. The cavity block 64 is configured in the same manner as in the second embodiment except that a cavity surface that defines the thin protrusion 15 is formed on the surface of the cavity block 64. The molding method is not shown, but the same steps as those in the first and second embodiments are performed. Therefore, also in this third embodiment, the same effect as in the first and second embodiments can be obtained.

As described above, according to the molded product according to the third embodiment, the thin portion that is not filled or difficult to fill in the normal molding is not necessarily related to the thickness of the cavity block 64 in the compression direction. It is also extremely effective when transferring fine irregularities on the surface.
In the third embodiment, the thin convex portion 15 is rectangular, but the shape is not particularly defined, and may be a thin concave portion.

  According to the third embodiment of the present invention, a movable molding comprising a cavity block 64 that constitutes a part of a molding component constituted by a molding die 50 that is filled with a molding material to mold a molded product. A part of the molding material which has a block member and is formed of the molding die 50 and is filled in the molding component by moving the molding block member composed of the cavity block 64 is changed to an uneven part such as the thin-walled convex part 15. From the operating rod 22 connected to the first release rod 43, which includes a molding apparatus body MA composed of a molding component 50 and a molding mechanism 20 configured as a molding die 50 that compresses to a desired thickness as the compression part 1. The actuator 21 for increasing the force from the actuating member to be transmitted to the molding block member comprising the cavity block 64 and driving the molding block member; Since it is provided in the molding apparatus main body MA composed of the molding component 50 and the molding mechanism 20 having a molding die 50, it has a portion having a thin concavo-convex portion that is not filled with a molding material or difficult to fill in normal molding. Without requiring a special molding machine or apparatus, a molding apparatus can be obtained that can accurately transfer the shape of the mold surface and can be molded efficiently.

  In each of the above embodiments, a box-shaped molded product is exemplified as the molded product. However, the shape of the molded product is particularly limited as long as it has a thin portion that is not filled or difficult to fill in normal molding. It is not something.

  Also, in order to preferentially fill the compression site with the melt molding material, the induction channel is provided in the first embodiment, and the throttle channel is provided in the cavity in the second and third embodiments. Both may be provided at the same time, or may not be provided depending on circumstances. Further, the shapes and positions of the guide channel and the throttle channel are not particularly limited.

  In each of the above embodiments, the temperature is adjusted by supplying water that is excellent in heat exchange efficiency and easy to handle to the temperature adjusting device disposed in the molding die 50 and the molding mechanism 20. It is not limited to water, and for example, a liquid such as ethylene glycol or various oils, or a gas such as saturated steam or heating steam may be supplied. Moreover, you may use an electric heater, a heat pipe, a Peltier device, etc. for a temperature control apparatus.

  In each of the above embodiments, a PC resin is used as a molding material. However, other applicable molding materials include (1) polyolefin resins such as polyethylene resin, polypropylene resin, polybutene resin, and (2). Polyvinyl chloride resins, aliphatic polyamide resins such as nylon 6 and nylon 66, (3) aromatic polyamide resins such as polyphthalamide resin, (4) polyester resins such as polyethylene terephthalate resin and polybutylene terephthalate resin , (5) Polyoxymethylene resins, polyether ether ketone resins, crystalline resins such as fluorine resins, (6) polystyrene resins, polysulfone resins, polyether sulfone resins, polyphenylene ether resins, polyallelito Resin, polyamideimide resin, poly Teruimido resin, acrylonitrile - styrene resin, acrylonitrile - styrene - amorphous resin such as butadiene-based resin, and (7) an aromatic polyester resin, liquid crystal polymer such as aromatic polyester amide resin. Further, a resin in which such an alloy or a filler such as glass fiber is blended can also be used.

  In each of the above embodiments, the resin is molded. However, the present invention can also be applied to die casting of a metal material typified by, for example, an aluminum alloy or a magnesium alloy. The present invention can also be applied to powder molding using an inorganic material. Examples of powder molding include ceramic injection molding, metal powder injection molding, and cemented carbide injection molding. In these powder moldings, a binder is mixed to impart plasticity to the molding material. As the binder, polyvinyl alcohol, polyvinyl bratil, polyethylene glycol, methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxypropyl cellulose, thermoplastic resins such as polyethylene, polypropylene, polystyrene, polyoxymethylene, waxes such as paraffin wax and carnauba wax There is kind.

  The molding apparatus according to the embodiment of the present invention includes an actuator that increases an external force. By operating the actuator by a molded product release mechanism attached to the molding machine, the molded product release mechanism is limited. Even with a large force, the cavity block is driven by increasing it to a large force.

  In the molding die according to the embodiment of the present invention, the cavity block that forms a part of the cavity has a drivable structure, and is driven by the actuator provided in the molding apparatus during or after the molding material is filled. The molded product is compressed to a desired thickness. In addition, an overflow part communicating with the cavity is provided around the cavity, and a mechanism for discharging the molding material remaining by compression to the overflow part and simultaneously discharging the gas in the cavity from the end part is provided. is there.

  The molded product according to the embodiment of the present invention is formed of a molding material thicker than other portions between the cavity inlet and the portion to be compressed to a desired thickness, or between the portion to be compressed to the desired thickness and the overflow. The flow path of the throttle is provided in a flow path that leads to a part other than the part that compresses to the desired thickness from the cavity inlet, or a path that leads to the cavity outlet from a part other than the part that compresses to the desired thickness. Or a guide channel and a throttle channel are both provided.

  According to the molding apparatus of the embodiment of the present invention, the cavity block is retracted to a thickness that can be filled in advance even for a molded product having a thin portion that is not filled with a molding material or difficult to fill in normal molding. When the cavity block is driven by the actuator provided in the molding device during or after filling the cavity with the molding material, even the limited force of the mold release mechanism attached to the molding machine increases to a large force. Can be compressed. Thus, even a molded product having a thin portion that requires a special molding machine or apparatus can be efficiently molded by accurately transferring the shape of the mold surface with a general-purpose molding machine. Further, since the actuator is operated by the molded product release mechanism attached to the molding machine, the cavity block can be driven with good timing and positional accuracy in conjunction with the molding process. Furthermore, since it is not necessary to introduce hydraulic pressure from the outside, it is possible to eliminate the cause of contamination of the molding environment such as oil leakage.

  According to the molding die of the embodiment according to the present invention, the cavity block can be driven and filled in advance even in a molded product having a thin portion that is not filled with molding material or difficult to fill in normal molding. The cavity block can be retracted to a possible thickness, and the molded product can be compressed to a desired thickness by being driven by an actuator provided in the molding apparatus during or after the molding material is filled. Thus, even a molded product having a thin portion that requires a special molding machine or apparatus can be efficiently molded by accurately transferring the shape of the mold surface with a general-purpose molding machine. In addition, an overflow part communicating with the cavity is provided around the cavity, and the compressed molding material is forced to the overflow part, so that the molding material can be compressed without difficulty. Such a load can be reduced. Furthermore, by providing a mechanism for discharging the gas in the cavity from the end of the overflow, the same effect can be obtained, the generation of gas burns can be suppressed, and the shape of the mold surface can be accurately transferred. .

  According to the molded article of the embodiment according to the present invention, it is thicker than other portions between the portion compressed from the cavity inlet to the desired thickness or between the portion compressed to the desired thickness and the cavity outlet. By providing a guide channel for the molded material, it is possible to positively fill the molding material in a portion that is not normally filled or difficult to fill, so that there is a molding material that wraps around from a portion other than incomplete filling so-called short or thin wall Weld lines generated by rejoining can be prevented. In addition, since the compressed molding material can be positively pushed to the overflow portion, the load on the cavity block and the actuator can be reduced. Furthermore, it is also possible to provide a throttle channel in a channel that leads from a cavity inlet to a portion other than a portion that compresses to a desired thickness, or a channel that leads from a portion other than a portion compressed to a desired thickness to a cavity outlet. There is an effect.

It is a perspective view which shows the external appearance of the molded article in Embodiment 1 by this invention. It is the top view and sectional drawing which show the molding material solidified body released from the shaping die in Embodiment 1 by this invention. It is sectional drawing which shows the shaping die and shaping | molding mechanism in Embodiment 1 by this invention. It is sectional drawing which shows the detail of the shaping | molding mechanism in Embodiment 1 by this invention. It is process sectional drawing explaining the shaping | molding method in Embodiment 1 by this invention. It is a perspective view which shows the external appearance of the molded article which concerns on Embodiment 2 by this invention. It is the upper side figure and sectional drawing which show the molding material solidified body released from the shaping die in Embodiment 2 by this invention. It is sectional drawing which shows the shaping die and shaping | molding mechanism in Embodiment 2 by this invention. It is process sectional drawing explaining the shaping | molding method in Embodiment 2 by this invention. It is a perspective view which shows the external appearance of the molded article in Embodiment 3 by this invention. It is the upper side figure and sectional drawing which show the molding material solidified body released from the shaping die in Embodiment 3 by this invention. It is sectional drawing which shows the shaping die and shaping | molding mechanism in Embodiment 3 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compression part, Guide flow path to compression part, 3 Guide flow path from compression part, 4 Bottom part, 5 Side part, 6 Cavity inflow port, 7 Cavity outflow port, 8 Overflow solidified body, 9 Molding material flow path Solidified body, 10 Molded article, 11 Molded material solidified body, 12 Melt molding material, 13 First throttle channel, 14 Second throttle channel, 15 Thin projection, 20 Molding device, 21 Actuator, 22 Actuating rod, 23 Transmission rod, 24 Pressure receiving rod, 25 Pressure transmission part, 26 Packing, 27 Actuator housing, 28, 29 Return spring, 30 Protrusion, 31 Air escape groove, 32 holes, 33 Heat insulation plate, 34 Temperature adjusting device, 35 Transmission surface 36, pressure receiving surface, 37 space, 38 fixing base, 39 air cylinder, 40 molding material injection device, 41 first mold fixing plate, 42 second mold fixing plate, 43 first mold release die 44, second mold release rod, 50 mold, 51 first mold, 52 second mold, 53 mold inlet, 54 first molding material flow path, 55 second molding material flow path, 56 cavity inlet, 57 cavity, 57a first mold side cavity, 57b second mold side cavity, 58 cavity outlet, 59 third molding material flow path, 60 overflow, 61 gas outlet, 62 gas Discharge path, 63 Suction device attachment port, 64 Cavity block, 65 Return spring, 66 Release pin, 67 Release plate, 68 Return spring, 69 Solenoid valve, 70 Buffer tank, 71 Vacuum pump, 72 Suction hose, A Cavity flow Inlet cutting position, B cavity outlet cutting position, D abutting surface.

Claims (8)

  A molding that has a movable molding block member that constitutes a part of a molding component for molding a molded product by filling a molding material, and is filled into the molding component by the movement of the molding block member The molding apparatus main body includes a molding apparatus main body that compresses a part of the material to a desired thickness, and an actuator that increases the force from the operating member and transmits the force to the molding block member to drive the molding block member is provided in the molding apparatus main body. A molding apparatus characterized by that.   An actuating member that receives external force, a pressure receiving member having a larger cross-sectional area than the actuating member, a transmission member that is connected to the pressure receiving member and transmits force to the molding block member, and these actuating members and pressure receiving members And an actuator housing that covers and holds the transmission member, a pressure transmission portion in which a fluid medium is sealed in a sealed space defined between the actuator housing, the actuation member, and the pressure receiving member, and the pressure transmission portion A sealing member for maintaining the sealing property of the actuator, a return spring for retracting the operating member, the pressure receiving member, and the transmission member connected to the pressure receiving member to an initial position after the operation is completed, and an actuator housing The molding apparatus main body is provided with an actuator composed of an air escape passage for communicating air in the space outside the actuator housing. Forming apparatus according to claim 1, symptoms. A molding product release mechanism is provided that is attached to the molding apparatus main body and releases the molding material solidified body from the mold in conjunction with the molding apparatus main body, and the operating member is driven by the molding product release mechanism to drive the molding apparatus. In the main body compression step, the molding block member is moved forward through the actuator to compress a part of the molding material filled in the molding component to a desired thickness, and in the mold release step of the molding device main body. The molding apparatus according to claim 1 or 2, wherein the molding block member is moved forward via the actuator to separate the molding material solidified body from the mold.   4. The molding component according to claim 1, further comprising an outlet for allowing the molding material filled in the molding component pressurized by the movement of the molding block member to overflow. The molding apparatus according to any of the above.   5. The molding according to claim 4, wherein the molding component is provided with a discharge passage through which gas in the molding component is discharged from a terminal portion of the molding material that flows out by an overflow operation through the outlet. apparatus.   Between the inlet that fills the molding structure with the molding material and the portion that compresses to a desired thickness, or the outlet that causes the molding material to overflow from the portion that compresses to the desired thickness, 6. The molding apparatus according to claim 1, further comprising a guide passage for the molding material that is thicker than other portions.   A flow path leading to a portion other than the portion compressed to a desired thickness from the inlet filling the molding material with the molding material, or an outlet allowing the overflow of the molding material from a portion other than the portion compressed to the desired thickness The molding apparatus according to claim 1, wherein a flow path for restriction is provided in the flow path leading to.   When molding a molded product by a molding apparatus main body having a molding component that fills the molding material and molds the molded article, an actuator provided on the molding apparatus main body is used to provide an external signal during or after the molding material is filled. The molding block member is driven by increasing the force and transmitted to the molding block member constituting a part of the molding component, and the molding component is filled by the movement of the molding block member. A molding method comprising compressing a part of a molding material to a desired thickness.

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