JP5225232B2 - Mold equipment - Google Patents

Description

  The present invention relates to a mold apparatus.

  A mold apparatus for forming a desired molded product using a mold is known. In such a mold apparatus, a die-casting apparatus that molds a molded product by pouring a metal such as aluminum that is heated and melted into the mold cavity, and a resin material such as plastic that is heated and melted into the mold cavity is injected and cooled and solidified. There is an injection molding machine or the like for molding a molded product.

  In such a mold apparatus, it is desirable to raise the temperature to an appropriate temperature by heating the mold before pouring metal into the mold cavity or injecting the resin material (see Patent Document 1). This is to obtain a molded product having a good surface condition and a low internal strain while preventing a decrease in metal fluidity in the cavity and early cooling and solidification of the material.

  Patent Document 1 discloses a technique for providing a flow path in a mold for circulating the return oil of a hydraulic device for driving an injection molding machine in the flow path with respect to the above-described injection molding machine. According to this technique, the mold can be economically heated with a small configuration by using the return oil of the hydraulic device.

  In this technique, an automatic control valve provided with a temperature sensor is provided in the flow path in the mold. With this configuration, when the temperature sensor determines that the temperature is lower than the set temperature, the automatic control valve is opened to circulate the return oil. Therefore, the mold can be heated only when the temperature of the mold is low, that is, when the mold needs to be heated.

Japanese Utility Model Publication No. 60-8976

  However, the technique disclosed in Patent Document 1 has a problem that the number of parts increases and the configuration becomes complicated because an automatic control valve, a member for opening and closing the automatic control valve, and the like are provided. In addition, there is a problem of durability such that these members are broken by the heat of the mold whose temperature is increased by heating.

  The present invention has been made in view of such technical problems, and an object of the present invention is to provide a mold apparatus capable of heating a mold while ensuring durability with a simple configuration.

The present invention is a mold apparatus for forming a desired molded product by injecting and filling a molten metal into a cavity formed between a movable mold and a fixed mold, and among the movable mold and the fixed mold, A pipe formed inside one of the molds and filled with a fluid for adjusting the temperature of the one mold, and a piston-type pump provided in or near the one mold. The piston pump operates when the rod portion of the piston pump is pushed by the other mold of the movable mold and the fixed mold during a mold clamping operation, and the fluid is generated inside the pipe line. It is characterized by flowing .

According to the present invention, the piston type pump piston type is provided inside or near one of the molds. The piston pump operates when the rod portion is pushed by the other mold of the movable mold and the fixed mold during the mold clamping operation, and allows fluid to flow inside the pipe. Therefore, it is possible to heat the mold while ensuring durability with a simple configuration.

It is a figure which shows schematic structure of a metal mold apparatus. It is a figure explaining the specific structure of a high temperature part and a low temperature part. It is sectional drawing which concerns on the 1st example of a piston type pump. It is sectional drawing which concerns on the 2nd example of a piston type pump.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the case where the present invention is applied to a horizontal mold apparatus (die casting apparatus) will be described as an example.

(Schematic configuration of the mold apparatus 10)
FIG. 1 is a diagram showing a schematic configuration of a mold apparatus 10. A mold apparatus 10 shown in FIG. 1 includes a movable mold 1, a fixed mold 2, a cavity 3, an injection unit 4, an ejector pin 5, a piston pump 6, a pipe line 7, a high temperature unit 8, a low temperature unit 9, and the like. is there. The mold apparatus 10 forms a molded product X by injecting and filling a molten metal into a cavity 3 from a molten metal path 42 constituting the injection unit 4.

  Hereinafter, each component of the mold apparatus 10 will be described.

  The movable mold 1 is a mold that can move with respect to the fixed mold 2. The movable mold 1 includes a movable side mounting plate 11 for mounting on a device body (not shown), a movable side mold plate 12 for molding the back surface (the left side surface in the figure) of the molded product X, and a space between these plates. The spacer block 13 is attached to the spacer block 13.

  The fixed mold 2 is a mold whose position is fixed. The fixed mold 2 includes a fixed-side mounting plate 21 for mounting on a device body (not shown) and a fixed-side mold plate 22 for molding the surface of the molded product X (the right side surface in the figure). .

  The cavity 3 is a space that is formed when the space between the movable side template 12 and the fixed side template 22 is closed, and has substantially the same shape as the molded product X. The molten metal injected by the injection unit 4 flows into the cavity 3 from the molten metal passage 42.

  The injection unit 4 is provided in the fixed mold 2 and injects a molten metal such as aluminum into the cavity 3. The injection unit 4 includes a hot water supply port 41 for supplying molten metal, a molten metal channel 42 that is a flow path of molten metal supplied from the hot water supply port 41, an injection blanker 43 that injects the molten metal in the molten metal channel 42 toward the cavity 3, and the like. Composed.

  The ejector pin 5 is an extrusion pin that is incorporated in the movable side mold plate 12 and has a tip that pushes out the back surface of the molded product X. The ejector pin 5 is controlled to protrude from the movable mold plate 12 when the molding of the molded product X is completed and the gap between the movable mold plate 12 and the fixed mold plate 22 is opened. Thereby, the molded product X can be extruded from the movable side template 12.

  The piston-type pump 6 is a fluid flow (circulation) device that is incorporated in the upper part of the fixed-side mold plate 22 and is connected to a pipe line 7 to be described later and flows (circulates) a fluid flowing through the inside of the pipe line 7. is there. The piston pump 6 includes a pump body 61 and a rod 62. The pump main body 61 is a main body of the piston type pump 6 built in the fixed side mold plate 22. The rod portion 62 is a rod-shaped member that is attached to the pump main body portion 61 and protrudes from the fixed-side mold plate 22 toward the movable-side mold plate 12 at the origin position. The rod portion 62 can reciprocate in the moving direction of the movable side template 12, that is, in the left-right direction in the figure. The specific configuration and operation of the piston pump 6 will be described later.

  The pipeline 7 is a hollow space formed over the entire vertical direction inside the fixed-side template 22. The pipeline 7 is constituted by a first pipeline 71 and a second pipeline 72. The upper and lower ends of the first pipe line 71 are connected to the pump body 61 and the high temperature part 8, respectively, and the low temperature part 9 is interposed in the middle of the pipe line. The upper and lower ends of the second pipe line 72 are connected to the pump body 61 and the high temperature part 8, respectively.

  With this configuration, the pipe line 7 constitutes one closed circulation system path via the piston pump 6, the high temperature part 8 and the low temperature part 9. The pipe 7 is filled with a fluid having heat conductivity such as oil. This filled fluid flows through the piston pump 6 in the direction of the arrow in the figure.

  The high temperature part 8 is a hollow fluid path provided in the vicinity of the molten metal path 42 of the fixed-side template 22, and is connected to the lower ends of the first pipe line 71 and the second pipe line 72. The fluid filled in the pipe line 7 passes through the high temperature part 8 from the second pipe line 72 and flows into the first pipe line 71.

  Further, the fluid flowing inside the high temperature portion 8 is heated by heat radiation from the molten metal (about 500 ° C. to 600 ° C.) flowing through the molten metal passage 42 and becomes high temperature. Therefore, the fluid that has flowed into the high temperature part 8 through the second pipe line 72 is heated when passing through the high temperature part 8 and becomes high temperature, and then flows out to the first pipe line 71. The arrangement of the high temperature portion 8 in the fixed side template 22 is such that the molten metal path 42 is heated to a high temperature (for example, about 200 ° C. to 250 ° C.) by being radiated from the molten metal flowing through the molten metal path 42. In other words, it can be said to be a position separated from the position. A specific configuration of the high temperature part 8 will be described later.

  The low temperature part 9 is a hollow fluid path provided at a position near the cavity 3 farther from the molten metal path 42 than the high temperature part 8, and is interposed in the first pipe 71. The fluid filled in the pipe line 7 flows from the first pipe line 71 (the lower side in the figure) through the low temperature portion 9 and flows into the first pipe line 71 (the upper side in the figure).

  Since the vicinity of the low temperature portion 9 is separated from the molten metal passage 42, the temperature becomes low. Conventionally, how to heat the vicinity of the low temperature portion 9 has been one of the important issues when controlling the entire fixed-side template 22 to an appropriate temperature (about 200 ° C.). Therefore, according to the present embodiment, the low temperature portion 9 is heated by passing the fluid that has been heated in the high temperature portion 8 to a high temperature. In addition, arrangement | positioning of the low temperature part 9 in the stationary-side template 22 can be paraphrased as a position where the necessity of heating is high because temperature is low. A specific configuration of the low temperature part 9 will be described later.

  As described above, in the mold apparatus 10 according to the present embodiment, the piston type pump 6, the pipe line 7, the high temperature part 8, and the low temperature part 9 are provided so as to raise the temperature of the entire fixed side mold plate 22 to an appropriate temperature. Provided.

  In FIG. 1, the first pipeline 71 is schematically illustrated so as to be disposed closer to the movable template 12 than the second pipeline 72. Strictly speaking, the first pipeline 71 and the second pipeline 72 are on the same plane perpendicular to the horizontal direction of the drawing, and the first pipeline 71 is more deep than the second pipeline 72 in the drawing direction. It is arranged on the side.

(Specific configuration of the high temperature part 8 and the low temperature part 9)
FIG. 2 is a diagram illustrating a specific configuration of the high temperature part 8 and the low temperature part 9. FIG. 2 shows an example of a specific configuration of the high temperature part 8. In addition, the low temperature part 9 is also the same structure.

  The high temperature portion 8 is formed by the processing hole 81 and the partition member 82. The processing hole 81 is a substantially cylindrical hole formed by machining from the fixed-side mounting plate 21 side in the fixed-side mold plate 22. The processed hole 81 is formed by dividing the first pipe 71 into two and communicating with each other, and at a position spaced from the surface of the fixed-side template 22 (the left surface in the drawing) by a certain gap. The partition member 82 is a member that is inserted into the processing hole 81 and forms a horizontal U-shaped passage inside the processing hole 81 by partitioning a part of the processing hole 81. The leading end side of the partition member 82 is configured as a flat plate. This is to form a horizontal U-shaped passage. Further, the rear end side of the partition member 82 is configured to be fitted with the machining hole 91. This is to prevent the fluid from flowing out from the processing hole 81 to the fixed side mounting plate 21.

  With this configuration, when the fluid that has flowed through the first pipe 71 from the lower side of the drawing flows into the high-temperature portion 8, the fluid flows through the lateral U-shaped passage. Then, it returns to the 1st pipe line 71 again, and flows upward in the figure. That is, the high temperature part 8 and the low temperature part 9 function to partially increase the flow path length of the pipe line 7.

  The high temperature part 8 having such a configuration is provided in the vicinity of the molten metal passage 42 as described above. The temperature of the molten metal flowing through the molten metal passage 42 is as high as about 500 ° C. to 600 ° C. Therefore, the fluid flowing inside the high temperature part 8 can be heated to a high temperature (for example, about 200 ° C. to 250 ° C.) by heat radiation from the molten metal passage 42.

  On the other hand, the low temperature part 9 having such a configuration is provided at a position in the vicinity of the cavity 3 on the side separated from the molten metal passage 42 as described above. Therefore, the fluid heated to a high temperature (for example, about 200 ° C. to 250 ° C.) in the high temperature portion 8 passes through the low temperature portion 9, so that the temperature of the fixed-side template 22 near the low temperature portion 9 is set to an appropriate temperature (about 200 The temperature can be raised to around 0 ° C.

(First example of piston type pump 6)
FIG. 3 is a cross-sectional view according to a first example of the piston pump 6. The piston type pump 6 shown in FIG. 3 has a configuration including a spring 63, a spacer 64, and the like in addition to the pump body 61 and the rod 62 shown in FIG.

(Configuration of piston pump 6 according to the first example)
Hereinafter, the configuration of the piston pump 6 according to the first example will be described.

  The pump main body 61 is a hollow casing having a storage portion 61A, an inflow portion 61B, an outflow portion 61C, and the like. The reservoir 61 </ b> A is a hollow space provided inside the pump body 61 to store the fluid flowing through the pipe line 7. 61 A of this storage part is the 1st storage part 61A-1 of the movable side mold plate 12 side (left side of a figure) rather than the piston part 62B, and the reverse side (right side of a figure) of the movable side mold plate 12 rather than the piston part 62B. ) Second reservoir 61A-2. These 1st storage part 61A-1 and 2nd storage part 61A-2 are connected via the flow-through part 62D. The inflow portion 61B is a communication hole that allows the storage portion 61A and the first pipe line 71 to communicate with each other. The inflow portion 61B is provided with a one-way valve or the like that allows fluid to flow only in the direction from the first pipeline 71 toward the storage portion 61A. The outflow portion 61C is a communication hole that communicates the storage portion 61A and the second pipeline 72. The outflow portion 61C is provided with a one-way valve or the like that allows fluid to flow only in the direction from the storage portion 61A toward the second pipe 72.

  The rod portion 62 is a moving body that is attached to the pump main body portion 61 and is movable in the direction of the arrow in the figure (the same as the moving direction of the movable side template 12). The rod portion 62 includes a rod main body portion 62A, a piston portion 62B, a pressure receiving portion 62C, and a flow passage portion 62D. The rod body 62A is a rod-shaped member disposed along the direction of the arrow in the figure across the inside and outside of the pump body 61. The piston portion 62B is a member that is attached to one end side of the rod main body portion 62A and that can reciprocate in the direction of the arrow in the drawing in the inner surface of the storage portion 61A. The pressure receiving part 62C is integrated with the piston part 62B by being attached to the other end of the rod body part 62A. The pressure receiving portion 62C protrudes toward the movable mold plate 12 at the origin position. Further, when the space between the movable side mold plate 12 and the fixed side mold plate 22 (both not shown) is closed, that is, when the mold is clamped, the pressure related to the mold clamping is received from the movable side mold plate 12. When pressure related to mold clamping is received, the movable side mold plate 12 moves in the moving direction. Along with this, the piston part 62B also moves in the same direction. The communication part 62D is a communication hole that is provided at the lower part of the piston part 62B and communicates the first storage part 61A-1 and the second storage part 61A-2. This flow part 61D is provided with a one-way valve or the like that allows fluid to flow only in the direction from the first storage part 61A-1 to the second storage part 61A-2.

  The spring 63 is an elastic member provided between the pump body 61 and the pressure receiving part 62C. One end of the spring 63 is fixed to the outer periphery of the pump main body 61, and the other end urges the pressure receiving portion 62C in the left direction in the drawing by an elastic force.

  The spacer 64 has a certain thickness and is a member that can be attached to and detached from the pressure receiving portion 62C and can be replaced. When the spacer 64 is attached to the pressure receiving portion 62C, the stroke length related to the reciprocating sliding of the piston portion 62B becomes variable according to the thickness of the spacer 64. Specifically, the greater the thickness of the spacer 64, the longer the amount of movement of the pressure receiving portion 62C. Along with this, the stroke length of the piston portion 62B also increases. On the other hand, the smaller the thickness of the spacer 64, the shorter the moving amount of the pressure receiving portion 62C. Along with this, the stroke length of the piston portion 62B also becomes shorter.

(Operation of the piston-type pump according to the first example)
Hereinafter, the operation that the piston-type pump 6 according to the first example performs in response to the opening and closing of the movable-side template 12 and the fixed-side template 22 will be specifically described.

  When the movable side mold plate 12 and the fixed side mold plate 22 are closed, the pressure receiving part 62C receives the pressure related to the mold clamping and moves in the direction of the pump main body part 61 (right direction in the figure). Then, along with this, the piston part 62B slides in the same direction on the inner surface of the storage part 61A. As a result, the internal pressure of the second reservoir 61A-2 increases, and the fluid stored in the second reservoir 61A-2 flows out to the second pipe 72 through the outlet 61C. In addition, the internal pressure of the first reservoir 61A-1 is reduced, and the fluid flows into the first reservoir 61A-1 from the first conduit 71 through the inflow portion 61B.

  Therefore, the piston pump 6 operates to cause the fluid stored in the second storage portion 61A-2 to flow out and to allow the fluid to flow into the first storage portion 61A-1.

  On the other hand, when the space between the movable side template 12 and the fixed side template 22 is opened, the pressure receiving portion 62C receives the elastic force of the spring 63 in the direction opposite to the direction of the pump main body 61 (left direction in the figure). Moving. Then, along with this, the piston part 62B slides in the same direction on the inner surface of the storage part 61A. As a result, the pressure inside the second reservoir 61A-2 becomes lower than the pressure inside the first reservoir 61A-1, and fluid flows from the first reservoir 61A-1 to the second reservoir 61A-2. Shed.

  Therefore, the piston type pump 6 operates so as to allow fluid to flow from the first storage portion 61A-1 to the second storage portion 61A-2 using the elastic force of the spring 63.

  From the above, the piston type pump 6 according to the first example is mechanically interlocked with the movement of the movable side mold plate 12 according to the opening and closing of the movable side mold plate 12 and the fixed side mold plate 22, The operation is performed by using the pressure for clamping the mold plates 12 and 22 or the elastic force of the spring 63. Thereby, the fluid can flow from the first pipe 71 toward the second pipe 72. In particular, the circulation of the fluid in the pipe line 7 is enabled by repeating this operation.

(Second example of piston type pump 6)
FIG. 4 is a cross-sectional view according to a second example of the piston pump 6. The piston pump 6 shown in FIG. 4 differs from the piston pump 6 according to the first example described above in that the spring 63 is provided in the second storage portion 61A-2. In the following description, the same reference numerals are given to portions that perform the same functions as those in the first example (FIG. 3) described above, and redundant descriptions are omitted as appropriate.

(Configuration of piston pump 6 according to the second example)
Hereinafter, the difference from the first example in the configuration of the piston type pump 6 according to the second example will be described.

  The spring 63 is an elastic member provided between the piston portion 62B and the inner wall of the second storage portion 61A-2 inside the second storage portion 61A-2. One end of the spring 63 is fixed to the inner wall of the second storage portion 61A-2, and the other end urges the piston portion 62B in the left direction in the figure by an elastic force.

(Operation of the piston pump according to the second example)
The operation that the piston-type pump 6 according to the second example performs in response to the opening and closing of the movable side mold plate 12 and the fixed side mold plate 22 is the same as the operation according to the first example described above. Omitted.

  From the above, the piston-type pump 6 according to the second example allows the flow of fluid from the first pipe 71 to the second pipe 72 as in the piston-type pump 6 according to the first example. It is possible. In particular, the circulation of the fluid in the pipe line 7 is enabled by repeating the above operation.

(Effects of the mold apparatus 10 according to this embodiment)
The mold apparatus 10 according to the present embodiment has been described above. The mold apparatus 10 according to the present embodiment has the following effects.

  First, it is possible to prevent the enlargement of the apparatus by providing a separate heating apparatus and to heat the fixed-side template 22 to an appropriate temperature at a low cost. This is because the pipe line 7 that passes in the vicinity of the molten metal path 42 is formed inside the fixed-side template 22, and the molten metal path is filled with a fluid such as oil having heat conductivity in the pipe line 7. This is because the fixed-side template 22 is heated using heat radiation from the molten metal flowing through 42.

  In addition, heating in the vicinity of the low temperature portion 9, which is one of the important issues in controlling the entire fixed-side template 22 at an appropriate temperature, can be realized with a simple configuration and at low cost. This is because the high-temperature part 8 and the low-temperature part 9 are provided, and the fluid heated from about 200 ° C. to 250 ° C. in the high-temperature part 8 is passed through the low-temperature part 9 without using a separate heating device. This is because the vicinity of the portion 9 can be heated.

  Moreover, it is possible to flow (circulate) the fluid flowing through the inside of the pipe line 7 while ensuring durability with a simple configuration. This is done automatically and mechanically using a clamping device between the movable side mold plate 12 and the fixed side mold plate 22, which is an essential operation for the mold apparatus 10, by a single device called the piston pump 6. This is because the fluid is circulated (circulated). In particular, the durability can be ensured because it is not necessary to provide a control circuit or the like that is broken by heat.

  In addition, the temperature of the fixed side template 22 can be easily adjusted. This is because the degree of heating in the vicinity of the low temperature part 9 can be controlled by changing the thickness of the spacer 64 attached to the pressure receiving part 62C to increase or decrease the fluid flow amount (circulation amount). Specifically, when the temperature of the fixed side template 22 is desired to be adjusted to a high temperature, the thickness of the spacer 64 is increased to increase the fluid flow rate (circulation rate). On the other hand, when it is desired to adjust the temperature of the fixed-side template 22 to a low temperature, the thickness of the spacer 64 is reduced to reduce the fluid flow rate (circulation rate).

(Summary)
As described above, according to the present embodiment, the conduit 7 in which one of the movable mold 1 and the fixed mold 2 (for example, the fixed mold 2, the same applies hereinafter) is filled with a temperature adjusting fluid. And a piston-type pump 6 that operates in conjunction with the clamping of the fixed mold 2 and the movable mold 1 and causes the fluid to flow inside the pipe 7. With such a configuration, a single mechanical device called the piston type pump 6 enables fluid to flow inside the pipe line 7. Therefore, it is possible to heat the mold while ensuring durability with a simple configuration (effect of the invention according to claim 1).

  In addition, according to the present embodiment, the piston pump 6 is provided in the mold or in the vicinity thereof, the reservoir 61A that stores fluid, and the piston 62B that reciprocates inside the reservoir 61A. A pressure receiving portion 62C that is integrated with the piston portion 62B and receives pressure related to clamping from the movable mold 1, and a spring 63 that biases the pressure receiving portion 62C in a direction opposite to the pressure receiving direction of pressure related to clamping. Have With this configuration, the fluid is automatically and mechanically flowed using the clamping operation between the movable mold 1 and the fixed mold 2 which is an essential operation for the mold apparatus 10 as a driving source. Therefore, the heating of the mold can be saved (effect of the invention described in claim 2).

  Further, according to the present embodiment, the spacer 64 is detachably attached to the pressure receiving portion 62C. By changing the thickness of the spacer 64 to be attached, the stroke length related to the reciprocating motion of the piston portion 62B is changed. Therefore, the increase / decrease of the fluid flow rate (circulation rate) and the degree of heating of the stationary mold 2 can be easily controlled (effect of the invention according to claim 3).

  Further, according to the present embodiment, the pipe line 7 constitutes one circulation path via the piston pump 6. The piston pump 6 operates in conjunction with repeated clamping and circulates fluid inside the pipe 7. With this configuration, one mechanical device called the piston type pump 6 automatically uses the mold clamping operation between the movable side mold plate 12 and the fixed side mold plate 22 which is an essential operation for the mold apparatus 10 as a drive source. In addition, the fluid can be circulated mechanically (effect of the invention according to claim 4).

  Although one embodiment of the present invention has been described above, the above embodiment shows one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  For example, in the above description, the case where the piston-type pump 6, the pipe line 7, the high temperature part 8, and the low temperature part 9 are provided on the fixed side mold plate 22 has been described as an example, but this is not a limitation. You may provide the piston type pump 6, the pipe line 7, the high temperature part 8, and the low temperature part 9 concerning the movable mold | type 1. FIG.

  Further, for example, in the above description, the case where the piston type pump 6 is built in the fixed side mold plate 22 has been described as an example, but the present invention is not limited to this case. You may arrange | position externally with respect to the stationary-side attachment board 21 in the exterior of the stationary-side template 22.

  Further, for example, in the above description, the case where the entire pipeline 7 is provided inside the fixed-side template 22 has been described as an example, but the present invention is not limited to this case. For example, the design of the route can be appropriately changed such that a part of the conduit 7 is provided inside the fixed side mounting plate 21.

  Further, for example, in the above description, it has been described that the stroke length of the piston portion 62 </ b> B is variable according to the thickness of the spacer 64. Therefore, in the initial setting when using the mold apparatus 10 according to the present embodiment, the thickness of the spacer 64 is changed to such a thickness that the stroke length capable of controlling the entire fixed-side mold plate 22 to a target temperature is obtained. It is desirable to do.

1 Movable type 2 Fixed type 3 Cavity 5 Ejector pin 6 Piston type pump (fluid flow (circulation) device)
7 Pipe line 8 High temperature part 9 Low temperature part 10 Mold apparatus 12 Movable side mold plate 22 Fixed side mold plate 42 Melt path 61 Pump body 62 Rod part 62B Piston part 62C Pressure receiving part 63 Spring (biasing part)
64 Spacer 71 First pipeline 72 Second pipeline

Claims (4)

A mold apparatus for forming a desired molded product by injection-filling a molten metal into a cavity formed between a movable mold and a fixed mold,
A conduit formed inside one of the movable mold and the fixed mold and filled with a temperature adjusting fluid of the one mold;
A piston-type pump provided in or near the one mold,
With
The piston-type pump operates when the rod portion of the piston-type pump is pressed by the other mold of the movable mold and the fixed mold during a mold clamping operation, and the fluid flows inside the pipe line. Let
A mold apparatus characterized by that. The piston pump is
A reservoir that is connected to the conduit and stores the fluid;
Reciprocating the inside of the reservoir, thereby causing the fluid to flow into the pipeline; and
With protruding toward the other mold from said reservoir is integrated in the piston portion, said rod portion having a pressure receiving portion for receiving the pressure applied to the mold clamping from the other mold,
An urging portion for urging the pressure receiving portion in a direction opposite to the pressure receiving direction of the pressure related to the mold clamping;
The mold apparatus according to claim 1, comprising: The mold apparatus according to claim 2, wherein a spacer for changing a stroke length related to reciprocation of the piston portion is detachably attached to the pressure receiving portion. The pipe line constitutes one circulation path through the piston pump ,
The piston type pump operates when the rod part is pushed by the other mold during the mold clamping operation repeatedly, and circulates the fluid inside the pipe. 4. The mold apparatus according to any one of 3.