JPH0671740B2 - Injection molding machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine, and more particularly to an injection molding machine having a plurality of cavities in a mold.

[Conventional technology]

Conventionally, as this type of injection molding machine, the one shown in FIG. 6 has been known.

This is because a heating cylinder 2 is provided below the hopper 1 for supplying the resin P, heaters 3 are wound around the heating cylinder 2, and a screw 4 is movable back and forth in the heating cylinder 2. It is provided and configured. Screw 4
Is rotated by a hydraulic motor or the like, and is moved forward by a hydraulic cylinder or the like, and a backflow prevention ring 5 is provided at the tip of the screw 4 so as to be movable back and forth. A nozzle 6 having a through hole 6a is provided at the tip of the heating cylinder 2. A mold 7 composed of a fixed mold 8 and a movable mold 9 is installed at a position facing the nozzle 6, and the tip of the nozzle 6 is brought into contact with one end surface of the fixed mold 8 to form a through hole 6a. And the sprue 10 of the fixed mold 8 are communicated with each other. The sprue 10 is branched on the way, and the cavities 11 and 1 of different sizes in the mold 7 are formed.
It is open to 2.

In the injection molding machine configured as described above, when the screw 4 is rotated, the resin in the hopper 1 is plasticized and passes through between the backflow prevention ring 5 and the screw 4 and the tip portion 2a in the heating cylinder 2 Stored in. In this case, the screw 4 moves backward as the plasticized resin is stored, and the amount of the backward movement measures the screw. When the tip 2a is filled with the amount corresponding to the cavities 11 and 12, the screw 4
Stop rotating.

Then, when the screw 4 is moved forward, the rear end surface of the backflow prevention ring 5 comes into close contact with the screw 4, the plasticized resin is injected from the through hole 6a of the nozzle 6, passes through the sprue 10, and passes through the cavity 11 of the mold 7. , 12 are filled.

[Problems to be Solved by the Invention]

By the way, in the above injection molding machine, even if the resin plasticized and measured by the heating cylinder 2 and the screw 4 is injected from the through hole 6a of the nozzle 6, the cavity 11 and the cavity 12 are simultaneously filled with the resin. Is not completed. That is, when the small volume cavity 11 is completely filled with the resin, the large volume cavity 12 has a portion that is not yet filled. For this reason, the resin in the cavity 11 and the resin in the cavity 12 have different pressurizing conditions, cooling time, and the like, which causes problems such as occurrence of burrs in the resin in the cavity 11.

As a method of solving this problem, the same number of heating cavities 2 and the number of screws 4 as the number of cavities 11 and 12 are provided, and in each of them, the weighing corresponding to the cavities 11 and 12 is performed, and injection is performed simultaneously. It is possible.
However, this method requires a large-scale device,
Therefore, there is a problem that it becomes expensive.

The present invention has been made in view of the above circumstances, and an object of the present invention is to be able to measure resin in a plurality of cavities having different capacities and complete injection of the resin into each cavity at the same time. An object of the present invention is to provide an injection molding machine capable of performing the same.

[Means for Solving the Problems]

In order to achieve the above object, the injection molding machine of the first invention is
An injection molding machine for injecting and molding a resin plasticized by a plasticizing device into a cavity of a mold, wherein a plurality of connection holes communicated with the cavity of the mold through a sprue, and a plasticizing device. Fixed plates provided with the same number of first passages connected to each other in an annular shape around a support shaft portion provided at the center of the recess, and the fixed plate around the support shaft portion. Of the measuring cylinders, which are rotatably fitted in the recesses of the fixing plate and are annularly provided around the supporting shaft portion at the first rotating position. While communicating with each other, the communication between each of the second passages branched from each of the measuring cylinders and the above-mentioned first passage of the fixed plate is blocked, and at the second rotation position, each of the first passages and each of the second passages. In addition to communicating with the passage individually, each connection hole A rotary disk that blocks communication between the respective measuring cylinders, a rotary drive unit that rotates the rotary disk with respect to the fixed disk, a plurality of plungers individually fitted to the respective measuring cylinders, and the rotary disk. In the first rotation position of the pressing member, the plunger is pressed by the pressing member to simultaneously inject the resin in each measuring cylinder into the cavity of the mold through each connection hole and each sprue, and the pressing member is provided. At the second rotating position of the turntable, the plungers pushed out from the respective measuring cylinders by the resin measured from the plasticizing device to the respective measuring cylinders through the first passage and the second passage are individually stopped. The number of resin amount setting members for setting the amount of resin is the same as that of the plungers.

In addition, the injection molding machine of the second invention, in the cavity of the mold,
An injection molding machine for injecting and molding a resin plasticized by a plasticizing device, wherein a plurality of connection holes communicating with a cavity of a mold are formed in a cylindrical member, and a bottom plate fixed to the cylindrical member is formed. A fixed plate having the same number of first passages as the connection holes, the fixed plate communicating with the plasticizing device on the support shaft part projecting at the center of the cylindrical member, and the cylinder of the fixed plate centered on the support shaft part. The measuring cylinders are rotatably fitted to the member, and at the first rotating position, the measuring cylinders, which are annularly provided around the supporting shaft portion and have the same number as the connecting holes, are branched individually and opened to the outer peripheral surface. The second passages are individually communicated with the respective connection holes of the fixed plate, and the third passages branched from the respective measuring cylinders are opened to the inner peripheral surface and the first passages of the fixed plate. The communication is blocked, and in the second rotation position, the above Each third passage causes each communicating individually with the first passage, each second for each connection hole
A rotary disk that blocks communication of the passage, a rotary drive unit that rotates the rotary disk with respect to the fixed disk, a plurality of plungers that are individually fitted to the respective measuring cylinders, and a first rotary disk. In the rotating position, injection moving means for pressing each plunger by the pressing member to simultaneously inject the resin in each measuring cylinder into the cavity of the mold through each connecting hole, and the pressing member, which is provided on the pressing member, At the two-turn position, each plunger pushed out from each measuring cylinder by the resin measured from the plasticizing device to each measuring cylinder through the first passage and the third passage is individually stopped to set the amount of resin. It is configured to include the same number of resin amount setting members as the plungers.

[Action]

The resin that has been plasticized by the plasticizing device is transferred to the second rotating disk.
When the measuring cylinders are rotated to the rotation position and fed into the plurality of measuring cylinders, the plungers of the respective measuring cylinders move and come into contact with the respective resin amount setting members and stop. As a result, a required amount of resin is measured for each measuring cylinder. Then, the turntable is turned to the first turning position, and each of the plungers is moved forward by the injection moving means to pressurize the resin measured in the measuring cylinder, thereby simultaneously applying the resin to each cavity. The injection is completed. Therefore,
Even if the capacities of the plurality of cavities are different from each other, good molding can be performed without causing burrs and the like due to overfilling the specific cavity with resin. Further, since the injection moving amount of each plunger is adjusted by each resin amount setting means, the injection amount can be easily changed when the capacity of the cavity changes.
Moreover, since the plasticizer and the cavity and the pressing member and the resin amount setting means are selected at the same time by the rotation of the turntable, the rational structure is simplified, and there is no risk of malfunction. Further, in the injection molding machine of the second invention, in addition to the above, the first passage is provided in the support shaft portion of the rotation center, and the distances from the plasticizing device to the respective measuring cylinders are substantially equal. The resin filling conditions can be made equal to improve the measurement accuracy, and the product quality can be made more uniform. In addition, the passage can be easily processed.

〔Example〕

An embodiment of an injection molding machine of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 are views showing a first embodiment of the present invention.

In the drawings, reference numeral 20 denotes a plasticizing device, which is a heating cylinder.
21 and a screw that can be moved back and forth inside this
22 and. The screw 22 is rotated by a hydraulic motor or the like, and is moved forward by a hydraulic cylinder or the like. Reference numeral 30 denotes a columnar fixing plate, and an annular recess 31 is formed on an end surface 30a of the fixing plate 30. In addition, the fixed platen 30 includes the inner peripheral surface 3 of the recess 31 from the end surface 30a.
A passage 32 leading to 1a is formed. This passage 32 is a linear introduction passage 32a formed in a direction orthogonal to the end surface 30a.
And an annular passage 32b which is branched from the introduction passage 32a and is formed in a circular shape when viewed from the end face 30a side, one end of which is opened to the annular passage 32b and the other end of which is opened to the inner peripheral surface 31a of the recess 31. And a plurality of branch passages 32c ... The introduction passage 32a is connected to the plasticizing device 20. In addition, the fixed plate 30 has a plurality of connection holes extending from the bottom surface 31b of the recess 31 to the end surface 30b.
33 ... is formed. The connection holes 33 are arranged annularly (on the same circumference as viewed from the end face 30a side) at equal intervals around the support shaft portion 30c provided at the center position of the bottom surface 31b.

A cylindrical rotary disk 34 is fitted in the recess 31 of the fixed disk 30 so as to be rotatable around a support shaft portion 30c of the fixed disk 30. The rotary disk 34 is formed with the same number of measuring cylinders 35 as the connection holes 33 and penetrating the supporting shaft portion 30c of the fixed disk 30. These measuring cylinders 35 are end surfaces of the fixed disk 30. 30
Seen from a, they are arranged at equal intervals on the circumference of the same diameter as the circumference of the connection holes 33. Further, in the turntable 34, a plurality of passages 36 leading from the respective measuring cylinders 35 to the outer peripheral surface 34a are ...
Are formed.

As shown in FIG. 2, a movable rod 37a of a hydraulic cylinder (rotational drive means) 37 whose base end is pivotally mounted on a fixed portion is pivotally mounted on the turntable 34. The turntable 34 is rotated by the above. Then, as shown in FIG. 2, when the movable rod 37a extends, the rotary plate 34 rotates in the X direction, and each passage 36 and the fixed plate 30 are rotated.
Each of the branch passages 32c of the passage 32 of (1) is communicated with each other (at this time, each of the measuring cylinders 35 is not communicated with each of the connection holes 33 of the fixed platen 30), and when the movable rod 37a retracts, the rotary plate 34 Rotates in the Y direction so that each measuring cylinder 35 communicates with each connection hole 33 of the fixed plate 30 (at this time, each passage 36 and the fixed plate 30).
It does not communicate with each branch passage 32c of the passage 32 of 30).

A plunger 38 is fitted in each of the measuring cylinders 35 so as to be capable of reciprocating in the axial direction. Reference numeral 39 denotes a hydraulic cylinder (injection moving means), and a disc-shaped pressing member 41 is fixed to a tip end portion of a movable rod 40 of the hydraulic cylinder 39. A plurality of adjusting screws (resin amount setting members) 42 ... Are screwed into the pressing member 41, and each adjusting screw 42 has a rotary disk 34.
Is the state of FIG. 2 (each passage 36 is a branch passage 32c of the fixed platen 30).
It is provided at a position corresponding to each of the above-mentioned plungers 38 in a state of communicating with).

50 is a mold including a fixed mold 51 and a movable mold 52.
In the mold 50, the same number of cavities 53a, 53b as the connection holes 33 of the fixed plate 30 (hence the same number as each measuring cylinder 35) are formed.
(8 in this embodiment) are provided. The cavities 53a, 53b ... Have different capacities. The fixed mold 51 is formed with a plurality of sprues 54a, 54b ... Which communicate with the cavities 53a, 53b. These sprues 54
The a, 54b ... Are connected to the respective connection holes 33 of the fixed board 30.

Each of the adjusting screws 42 adjusts the protruding length from the end surface 41a of the pressing member 41 so that each plunger 38 is pressed by the pressing member.
When moving to the 41 side, this movement is stopped and each cavity 53
The amount of resin filled in each of the measuring cylinders 35 is set according to the capacities of a, 53b ... And when the capacity of the cavity is small, the resin is further projected from the end surface 41a.

Next, the operation of the injection molding machine thus configured will be described.

Each branch passage 32 of each passage 36 of the turntable 34 and the passage 32 of the fixed plate 30
In the state of communicating with c, the resin plasticized by the plasticizing device 20 in the same manner as the conventional injection molding machine
When it is sent from 20 to each measuring cylinder 35 through the passage 32 of the fixed plate 30 and each passage 36 of the rotary plate 34, as the resin flows into each measuring cylinder 35, each plunger 38 is adjusted by each adjusting screw 42.
It moves backward to the side and abuts on each adjusting screw 42 to stop. When all the plungers 38 come into contact with the corresponding adjusting screws 42, the resin supply is stopped.

Next, the turntable 34 is rotated by the hydraulic cylinder 37 in the Y direction in FIG.
And communicate with. At this time, the adjusting screws 42 and the plungers 38 are displaced from each other.

Then, the movable rod 40 of the hydraulic cylinder 39 is extended by a predetermined length. By doing so, each plunger 38 is pushed forward by the end surface 41a of the pressing member 41, and the resin in each measuring cylinder 35 is connected to the connection holes 33 ..., Sprues 54a, 54b.
... is injected into. In this case, each cavity 53a, 53b ...
To (the free length of the measuring cylinder 35 when the plunger 38 contacts the adjusting screw 42) x (area of the measuring cylinder 35)
Of resin is injected. Therefore, by adjusting the protruding length of each adjusting screw 42 from the end surface 41a of the pressing member 41, the injection amount corresponding to each of the cavities 53a, 53b ... Can be measured.

Next, after retracting the movable rod 40 of the hydraulic cylinder 39,
The rotary disc 34 is rotated in the X direction in FIG. 2 by the hydraulic cylinder 37 to connect the passages 36 with the branch passages 32c of the passage 32 of the fixed plate 30. After that, the above operation is repeated.

In such an injection molding machine, the resin plasticized by the plasticizer 20 can be measured by each measuring cylinder 35 according to the capacity of each cavity 53a, 53b. The resin can be completely injected into the cavities 53a, 53b ... Simultaneously by the hydraulic cylinder 39. Therefore, good molding can be performed without causing burrs.

Further, since the injection movement amount of each plunger 38 is adjusted by each adjustment screw 42, there is an advantage that the injection amount can be easily changed when the capacity of the cavity changes.

In the above embodiment, the measuring cylinder 35 has the same inner diameter, and the moving distance of each plunger 38 is adjusted by each adjusting screw 42 to measure the injection amount into each cavity 53a, 53b. Alternatively, the diameter of each plunger 38 may be changed.

(Second Embodiment) FIG. 3 is a diagram showing a second embodiment. In the figure, the same components as those in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, vacuum molding and injection molding are performed.

In FIG. 3, reference numeral 60 is a die including a female die 61 and a male die 62. The female die 61 is provided with a plurality of through holes 63 for vacuum reference, and each through hole 63 is connected to a vacuum pump or the like (not shown). Further, the female die 61 is provided with cavities 64a, 64b, 64c ... Having different capacities. 65 is a plastic sheet.

Next, the operation of the injection molding machine thus configured will be described.

The resin plasticized by the plasticizing device 20 is weighed in each weighing cylinder 35 in the same manner as the device of the above embodiment.

Then, the heated plastic sheet 65 is inserted between the female die 61 and the male die 62, and either the female die 61 is lowered or the male die 62 is raised and sandwiched between them, and then each is penetrated by a vacuum pump or the like. The air between the female die 61 and the plastic sheet 65 is exhausted from the hole 63, and the plastic sheet 65 is removed from the female die 61.
In close contact with.

Next, the hydraulic cylinder 39 injects the resin in each measuring cylinder 35 into each cavity 64a, 64b, 64c .... By doing so, since the plastic sheet 65 is still in a heated state, the resin injected into the cavities 64a, 64b, 64c ... Completely welds to the plastic sheet 65.

Such an injection molding machine has the following effects in addition to the effects of the first embodiment.

That is, vacuum molding is suitable for molding large-sized thin-walled molded products that are difficult to perform by injection molding, but in principle, it is not possible to mold thicker products than the thickness of the sheet. When it is desired to provide a thick portion such as a boss, conventionally, it has not been possible to cope with this at the time of molding, and the only option has been to bond a separately molded product in a separate process. For this reason, after molding, they were joined using an adhesive or welded, resulting in poor production efficiency. In the injection molding machine of this embodiment, since ribs, bosses, etc. can be provided at the same time as vacuum molding, production efficiency can be improved.
Even if the thick parts such as ribs and bosses have different sizes, they can be molded well. Further, since the bosses and ribs are formed while the plastic sheet 65 is in a heated state, it is possible to obtain bosses and ribs having higher strength than those of the bonded ones.

(Third Embodiment) FIGS. 4 and 5 are views showing a third embodiment of the present invention.

The fixed plate 30 of this injection molding machine is formed by integrally fixing a bottom plate 30f to one end of a cylindrical member 30e with a plurality of bolts 90,
The side end of the opening is fixed to the support plate 85 with a bolt 85a. A support shaft portion 30g is provided at the center of the bottom plate 30f. The support shaft portion 30g is formed in a circular cross section, and the cylindrical member 30e
It protrudes to the center position. The turntable 34 is fitted to the support shaft portion 30g so as to be rotatable in the circumferential direction on the cylindrical member 30e, and
It is sandwiched by the bottom plate 30f and the shoulder 85c of the insertion hole 85b of the support plate 85, and is fitted so as not to move in the axial direction.

An introduction passage 30h is formed in the center of the support shaft portion 30g, and the opening end thereof is a nozzle touch portion 30j with which a nozzle (not shown) of the plasticizing device is brought into contact. Further, the support shaft portion 30g has a plurality of passages 30k, 30m ...
Individually) The support shaft portion 30g is opened in the outer peripheral surface and is radially formed at equal intervals in the circumferential direction. Passages 30k and 30m are introduction passages
The position is shifted in the length direction of 30h and the phase is shifted by 1/2 pitch.

Further, the cylindrical member 30e has the same number of connection holes as the passages 30k, 30m ...
30n, 30p ... are provided at positions corresponding to the passages 30k, 30m. The connection holes 30n, 30p ... Are connected to the cavity of the mold through piping or the like. The turntable 34 includes weighing cylinders 35a, 35
A plurality of b ... Are provided (eight in the figure). The measuring cylinders 35a ... Are arranged annularly at equal intervals around the center of rotation of the turntable 34, and the other measuring cylinders 35b.
Are arranged inside the measuring cylinders 35a at regular intervals around the center of rotation of the turntable 34, and are arranged with a 1/2 pitch phase difference from the measuring cylinder 35a. Each measuring cylinder 35a,
Female screws 35c that are screwed into male screws 38a formed on the outer end side of each plunger 38 are formed at the outer opening ends of 35b.

The turntable 34 has passages 34b, 34c, ... Which communicate the measuring cylinders 35a, 35b ... With the passages 30k, 30m, ... at one rotating position of the turntable 34, and the measuring cylinders 35a, 35c ,. Passages 34d, 34e ... Communicating 35b ... With the connection holes 30n, 30p ... Are formed radially and linearly with each other. The support plate 85 has a plurality of support rods 86 (4 in the figure).
The pressure cylinder 41 is fixed to the movable rod 40 of the hydraulic cylinder 39. The pressing member 41 fixed to the movable rod 40 of the hydraulic cylinder 39 is The pair is supported and guided by the pair of and is moved in a direction of approaching and separating from the rotary disk 34. The hydraulic cylinder 37 has a bracket 88 whose base end is fixed to the support plate 85 and the support rod 86.
Further, the movable rod 37a is rotatably supported by a support pin 37b, and the movable rod 37a is rotatably connected to a metal fitting 89 fixed to the outer peripheral portion of the rotary plate 34 on the protruding end side from the support plate 85.

4 and 5, reference numeral 91 is a heater band, 92 is a sheath heater, 93 is a measuring cylinder 35a, 35b ...
Is a plug that closes the end on the bottom plate 30f side, and 94 is a plug that closes one end of the introduction passage 30h.

Since the other structure of this embodiment is the same as that of the injection molding machine of FIGS. 1 and 2, the same reference numerals are given and detailed description thereof is omitted. Needless to say, when the volumes of the measuring cylinders 35a and 35b are changed, the adjustment screw 42 is moved forward and backward.

The operation of the injection molding machine of this embodiment is basically the same as that of the injection molding machine of the first embodiment shown in FIGS.

That is, the nozzle of the injection molding machine is brought into contact with the nozzle touch portion 30j, and the resin is introduced into the passage 30h, the passages 30k and 30m, and the passage.
Each metering cylinder 35a, 35b is filled through 34b, 34c (see FIG. 4).

Next, the hydraulic cylinder 37 is actuated to rotate the turntable 34 by a predetermined angle (22.5 degrees in the figure) to move the measuring cylinders 35a,
The passages 34d, 34e of 35b are communicated with the connection holes 30n, 30p, the hydraulic cylinder 39 is operated and the plunger 38 is pushed by the pressing member 41, and the resin in each of the measuring cylinders 35a, 35b is filled in the plurality of cavities of the mold. To do.

Weighing cylinder 35a, which has a small number of mold cavities,
Unused weighing cylinder 3 if you do not need to use 35b
5a, 35b is pushed into the plunger 38, the male screw 38a of the plunger 38 is screwed into the female screw 35c of the turntable 35, the tip of the plunger 38 closes the passages 34b, 34c, 34d, 34e, and the resin is introduced. Do not enter the measuring cylinders 35a, 35b from the passage 30h through the passages 30k, 30m.

In this injection molding machine, the distances from the introduction passage 30h to the respective measuring cylinders 35a, 35b are substantially equal to each other, so that the resin filling conditions can be made equal to improve the measuring accuracy. The passages 34b, 34d, 34c, 34e linearly penetrate the turntable 34,
Further, since the passages 30k and 30m are similarly released from the outer peripheral surface of the support shaft portion 30g to the introduction passage 30h, they can be easily processed.

〔The invention's effect〕

As described above, since the injection molding machine according to the present invention is configured as described above, even if the capacities of a plurality of cavities are different from each other, resin is overfilled in a specific cavity and burrs or the like is not generated. Good molding can be performed without any occurrence. Further, since the injection moving amount of each plunger is adjusted by each resin amount setting means, the injection amount can be easily changed when the capacity of the cavity changes. Moreover, since the plasticizer and the cavity and the pressing member and the resin amount setting means are selected at the same time by the rotation of the turntable, the rational structure is simplified, and there is no risk of malfunction. Further, in the injection molding machine of the second invention, in addition to the above, the first passage is provided in the support shaft portion of the rotation center, and the distances from the plasticizing device to the respective measuring cylinders are substantially equal. The resin filling conditions can be made equal to improve the measurement accuracy, and the product quality can be made more uniform. In addition, the passage can be easily processed.

[Brief description of drawings]

1 and 2 are views showing a first embodiment of the present invention, FIG. 1 is a sectional view showing a schematic structure, and FIG. 2 is a view taken along the line II-II of FIG. . FIG. 3 is a view showing a second embodiment of the present invention and is a sectional view showing a schematic structure. Fourth
5 and 5 are views showing a third embodiment of the present invention, FIG. 4 is a sectional view, and FIG. 5 is a partially cutaway bottom view. FIG. 6 is a view showing a conventional injection molding machine and is a sectional view showing a schematic configuration. 20 …… Plasticizer, 30 Fixed plate 30c, 30g …… Support shaft, 30e …… Cylinder member 30f …… Bottom plate, 30k, 30m …… Passage 30n, 30p …… Connecting hole, 31 …… Recess 32c… ... passage, 33 ... connection hole 34 ... turntable, 34b, 34c ... passage 34d, 34e ... passage 35, 35a, 35b ... measuring cylinder, 36 ... passage 37 ... hydraulic cylinder 37 (rotation drive) Means), 38 ... Plunger 39 ... Hydraulic cylinder (injection moving means), 41 ... Pressing member 42 ... Adjusting screw (resin amount setting means), 50 ... Mold 53a, 53b ... Cavity, 54a, 54b ...... Spruce

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Wataru Sato 2-5-1 Shirooka, Nagaoka City, Niigata Prefecture Niigata Iron Works Nagaoka Factory (56) References JP-A-62-25027 (JP, A)

Claims (2)

[Claims] 1. A cavity (53a, 53b) of a mold (50),
An injection molding machine for injecting and molding a resin plasticized by a plasticizing device (20), the cavity (53a, 53a,
53b) a plurality of connection holes (33) communicating with the sprues (54a, 54b) and a first passage (32c) communicating with the plasticizing device (20), the same number as the connection holes (33). But the recess (3
1) A fixed plate (30) annularly provided around the support shaft (30c) provided at the center position, and a recess of the fixed plate (30) centered around the support shaft (30c) (31) is rotatably fitted to the support shaft portion (30
The same number of measuring cylinders (35) as the connecting holes (33), which are annularly provided around the c), are connected to the connecting holes (3) of the fixing plate (30).
3) to communicate individually with each other, and to block communication between each second passage (36) branched from each measuring cylinder (35) and the first passage (32c) of the fixed plate (30). At the second rotation position, the first passages (32c) and the second passages (36) are individually communicated with each other, and the measurement cylinders (35) are communicated with the connection holes (33). A rotary disk (34) for shutting off, a rotary drive means (37) for rotating the rotary disk (34) with respect to the fixed disk (30), and a measuring cylinder (35) individually fitted into each. Plural plungers (38) and turntable (3
In the first rotation position of 4), each plunger (38) is pushed by the pressing member (41) so that the resin in each measuring cylinder (35) is passed through each connection hole (33) and each sprue (54a, 54b). The injection moving means (39) for simultaneously injecting into the cavities (53a, 53b) of the mold (50) and the pressing member (41) are provided, and plasticize at the second rotation position of the rotating disk (34). Each plunger (38) pushed out from each measuring cylinder (35) by the resin measured from the device (20) to each measuring cylinder (35) through the first passage (32c) and the second passage (36) is individually. Stop and set the resin amount,
An injection molding machine comprising the same number of resin amount setting members (42) as the plungers (38). 2. An injection molding machine for injecting and molding a resin plasticized by a plasticizing device into a cavity of a mold, wherein a plurality of connections are connected to a cylindrical member (30e) in the cavity of the mold. Holes (30n, 30p) are formed in the bottom plate (30f) fixed to the cylindrical member (30e), and the supporting shaft portion (30g) protruding to the central position of the cylindrical member (30e) communicates with the plasticizing device. The same number of first passages (30k, 30p) as the above connection holes (30n, 30p)
m) is provided on the fixed plate (30) and the support shaft (30g)
The connection hole, which is rotatably fitted to the cylindrical member (30e) of the fixed plate (30) around the center and is provided in a ring shape around the support shaft portion (30g) at the first rotation position. (30n, 3
The second passages (34d, 34e) branching off from the same number of measuring cylinders (35a, 35b) as the number of
Respectively to communicate with the respective connection holes (30n, 30p) of the fixed plate (30), and to respectively branch from the respective measuring cylinders (35a, 35b) to the respective third passages (opened on the inner peripheral surface). 34b, 34c) and the first passage (30k, 30) of the fixed plate (30)
m), the third passages (34b, 34c) are individually communicated with the first passages (30k, 30m) at the second rotation position, and the connection holes (30n , 30
a rotary disk (34) for blocking the communication of the second passages (34d, 34e) with respect to p) and a rotary drive means (37) for rotating the rotary disk (34) with respect to the fixed disk (30) ), A plurality of plungers (38) individually fitted into the respective measuring cylinders (35a, 35b), and a pressing member (41) for pressing the respective plungers (38) at the first rotation position of the rotating disk (34). ) To push the resin in each weighing cylinder (35a, 35b) into each connection hole (30
(n, 30p), injection moving means (39) for simultaneously injecting into the cavity of the mold, and the pressing member (41),
At the second rotation position of the turntable (34), the resin is metered from the plasticizer to the respective measuring cylinders (35a, 35b) through the first passages (30k, 30m) and the third passages (34b, 34c). It is equipped with the same number of resin amount setting members (42) as the plungers (38) for setting the amount of resin by individually stopping each plunger (38) pushed out from each measuring cylinder (35a, 35b). An injection molding machine characterized by that.