JPH0453723A - Injection molder and mold clamping device and injection device therein - Google Patents

Abstract

PURPOSE:To make the feed flow rate and the discharge flow rate to a hydraulic pump equal by a method wherein an auxiliary mold clamping cylinder is arranged radially outward a mold clamping ram and, at the same time, the piston rod of the auxiliary cylinder is joined to the mold clamping ram so as to form a closed circuit between respective cylinders and the hydraulic pump. CONSTITUTION:At mold closing, oil, the amount of which is larger than the amount introduced to the small areal pressure receiving face (a) side, is discharged from the large areal pressure receiving face (b) side in a cylinder 1. The discharged oil is not sent back as it is to a suction line T but poured to the large areal pressure receiving face (d) side of an auxiliary cylinder 5. Oil, which is discharged from the small areal pressure receiving face (c) side, is sent back to the suction line T. In addition, since the areal relationships between the respective pressure receiving faces is set to be a=c and b=d, the imbalance between the feed flow rate and the discharge flow rate in the cylinder l can be absorbed in the auxiliary tank 5 or the amount of the oil introduced to the small areal pressure receiving face (a) side in the cylinder 1 becomes equal to the amount of the oil discharged from the small areal pressure receiving face (c) side in the auxiliary cylinder 5, resulting in allowing to realize a closed circuit without trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold clamping device and an injection device having a closed circuit configuration, and an injection molding machine that combines these devices.

(Prior art) Conventionally, when configuring the mold clamping device of an injection molding machine, if a closed circuit is formed between the cylinder and the hydraulic pump, the tank capacity can be made smaller compared to an open circuit. In addition, it has the advantage of being able to apply an appropriate amount of back pressure to the discharge side of the cylinder and stabilize the operation of the ram.
As disclosed in Publication No. 177303 and shown in FIG. 2, the clamping cylinder (E) and the injection Hi! Both the mold clamping ram (J) and the injection ram (K) installed inside the injection cylinder (F) in (Y) are double-rod type, and the pressure receiving areas of the opposing rod side chambers are equalized, and each cylinder (E) By making the supply and discharge flow rates of (F) equal, each cylinder can be directly connected to the discharge line (P) and suction line (T) of the hydraulic pump (G) via the switching valves (V) and (W). It is designed to form a closed circuit.

(Problem to be Solved by the Invention) However, in the above method, in realizing a closed circuit, a double rod system is adopted to equalize the opposing pressure receiving area, but the mold clamping device t (X) In the case of the ram (J), it is sufficient to be able to operate the movable mold placed at one end in the axial direction, and originally one rod would be sufficient.If the rod was extended to the other side only to equalize the pressure receiving area, the entire device would be damaged. There is a problem that the length becomes long in the axial direction, which goes against the demand for space saving. In addition, with the mold clamping device (X), it is desired to move the movable mold at high speed when closing the mold, and to slowly retract the mold with a large force that overcomes the adhesive force of the molded product when opening the mold. Since the pressure-receiving areas of the two rod side chambers are equal, if the rod is made thicker and its pressure-receiving area is made smaller to meet the high-speed requirements for mold closing,
On the other hand, if the pressure-receiving area is increased to coincide with the mold opening, the force at the time of mold opening becomes smaller, but the mold closing speed becomes slower. If the area is increased, the capacity of the hydraulic pump (G) must be increased to significantly increase the discharge flow rate in order to compensate for the speed reduction during mold closing, which poses the problem of increased costs. .

On the other hand, injection mount! (Y), it is customary to install a pellet injection operating body on the negative side of the injection ram (K) in the axial direction, and a power source for rotating it on the other side, so a double rod type is used. However, the rod on the opposite side of the pellet injection operating body can be used as a shaft for transmitting rotational power, and the axial length will not be unnecessarily extended. The rod is thick to ensure rigidity, and the rod on the opposite side has a large pressure-receiving area that can push the pellet injection operation body toward the injection side with a strong force.
Due to the requirement to ensure connectivity with the rotating power source, we want to make the rods thinner, so in order to realize a closed circuit, it is not possible to make the two rods the same thickness in order to equalize the opposing pressure receiving area.
There is a problem that the functions required of the rod on the blade side cannot be fulfilled.

In other words, in the above system, in order to realize a closed circuit, whether it is the mold clamping device [(X) or the injection device (Y), the pressure receiving area inside each cylinder (E) and (F) is Since the rams (J) and (K) are made to have the same number of rams, there is a problem that the functions required of each ram (J) and (K) cannot be fully performed.

In the present invention, by providing an auxiliary cylinder outside the mold clamping cylinder and the injection cylinder and equalizing the supply and discharge amounts between these cylinders, it is possible to realize a closed circuit and solve the above problem. The main objective is to provide an injection molding machine and a mold clamping device and an injection device for the injection molding machine.

(!!l!Means for solving the problem) Therefore, in order to achieve the above purpose, firstly, a single rod type mold is used to move the movable mold (2) forward and backward in the mold clamping cylinder (1). A tightening ram (3) and a piston (31) of the ram (3).
) side, a small area pressure receiving surface is provided on the opposite side of the fixed piston (4), and the ram (
3) An injection molding machine in which a large-area pressure-receiving surface is provided in each of the rod side chambers so that the mold clamping ram (3) operates at high speed when closing the movable mold (2) and at low speed when opening the mold. In the mold clamping device, the pressure receiving surface for moving the mold clamping ram (3) to the advancing side and the pressure receiving surface for moving the mold clamping ram (3) to the retreating side are made equal in area, and the discharge amount from the hydraulic pump (10) and the corresponding pressure receiving surface are made equal in area. A mold clamping auxiliary cylinder (5) is formed to equalize the suction amount to the pump (10), and this auxiliary cylinder (5) is disposed radially outward of the mold clamping ram (3), and the auxiliary cylinder The piston rod (5o) of the cylinder (5) was connected to the mold clamping ram (3), and a closed circuit was formed between each of the cylinders (1) (5) and the hydraulic pump (1o).

Second, in the first configuration, the mold clamping auxiliary cylinder (5) is composed of a plurality of divided cylinders (51, 52), and each divided cylinder (51, 52) is connected to the mold clamping ram (3). They were arranged symmetrically in the circumferential direction.

Thirdly, in the first or second configuration, when the mold is opened, the large area pressure receiving surface side of the mold clamping cylinder (1) is connected to the hydraulic pump (1).
o), which is connected to the supply line extending from
5), a low speed mode in which the small area pressure receiving groove on the rod side is connected to each other, and a small area pressure receiving groove in the mold clamping auxiliary cylinder (5) is connected to the supply line, and the cylinders (1) and (5) are connected to each other. A speed change means is provided for switching between a high-speed mode and a high-speed mode in which the large-area pressure-receiving surface sides of the motor are connected to each other.

Fourth, the injection cylinder (6) has a piston (8, 1) with pressure receiving surfaces of different areas on both sides, and an injection ram (8) that moves the pellet injection operating body (7) back and forth. an injection device in a machine, the injection ram (8)
An injection auxiliary cylinder that makes equal areas of the pressure receiving surface that moves the pump to the advancing side and the pressure receiving surface that moves the pump to the retreating side, and equalizes the discharge amount from the hydraulic pump (10) and the suction amount to the pump (lO). (9), and the auxiliary cylinder (9) is arranged radially outward of the injection ram (8), and the piston rod (90) of the auxiliary cylinder (9) is connected to the injection ram (8). coupled to each of said cylinders (8) (9)
A closed circuit was formed between the pump and the hydraulic pump (10).

Fifth, in the fourth configuration described in Section 2, the injection auxiliary cylinder (9)
is composed of a plurality of divided cylinders (91, 92), and the divided cylinders (91, 92) are arranged symmetrically in the circumferential direction of the injection ram (8).

Sixth, in the fourth or fifth configuration, the injection cylinder (6
) and the supply/discharge line connected to the injection auxiliary cylinder (9), the injection ram ( 8) was provided with a resistance means.

Seventhly, the first configuration and the fourth configuration were combined.

(Function) The first means moves the mold clamping ram (3) at high speed when closing the mold.
The mold clamping ram (3) can be driven at low speed when the mold is opened, and the ratio between the flow rate introduced into the mold clamping cylinder (1) and the flow rate discharged from the cylinder (1) during mold closing and mold opening can be reduced. The balance is corrected by the auxiliary cylinder (5), which allows equal supply and discharge flow rates to the hydraulic pump (10), without any problems with the construction of a closed circuit.

By the second or fifth means, the mold clamping ram (3) or the injection ram (8) can be operated in a well-balanced manner in the forward and backward directions.

According to the third means, when the mold is opened, by initially setting the mold to a low speed mode, the mold can be removed with a large force at low speed, and by later switching to the high speed mode, the movement after mold removal can be performed quickly.

By the fourth means, the piston (8) in the injection ram (8)
Even if the pressure receiving area in 1) is different due to different thicknesses of the protruding rods on both sides, the imbalance in the supply and discharge of the injection cylinder (6) can be corrected with the injection auxiliary cylinder (9), and a closed circuit can be achieved. It can be realized.

By the sixth means, when loading the pellet, the injection ram (8)
The moving force of the ram can be regulated against the reaction force acting on the ram,
Allows for stable loading operation.

With the seventh means, the entire injection molding machine can be satisfactorily configured as a closed circuit.

(Example) What is shown in Fig. 1 is a mold clamping device (100) and an injection device!
This is an injection molding machine that combines (200).

The mold clamping device (100) includes a mold clamping cylinder (1), a single-rod mold clamping ram (3) for advancing and retracting a movable mold (2) relative to a fixed mold (21), and the ram (3). piston (31
) side, a small area pressure receiving surface (a) on the opposite side of the fixed piston (4), and a large area pressure receiving surface (b) in the rod side chamber of the ram (3). When the mold is closed, the directional control valve (40) connected to the discharge line (P) and suction line (T) of the hydraulic pump (10) is switched to the port position on the left in the figure. ) side to move the ram (3) at high speed to the advancing side, and when the mold is opened to switch the directional control valve (40) to the cloth port position in the figure, the large area pressure receiving surface (b) side Pressure oil is guided to move the ram (3) to the retreating side at low speed.

The hydraulic pump (10) includes a swash plate (11), and controls the pressure and flow inputs (P in, Q in) and the detected values of the pressure sensor (13) and the swash plate angle sensor (14). (15) and feedback control of the swash plate (11) via the control valve (16) and control plunger (17) enables arbitrary pressure and flow rate control. Further, the pump (10) constitutes a closed circuit pump, so that insufficient flow in the system due to leakage or the like can be replenished from the charge pump (12) via the check valve (27). (■8) is a charge pressure relief valve, and (19) is a relief valve that releases abnormal rises in main discharge and suction pressure, and check valve (
28, 29) to the discharge and suction lines (P, T).

With the above configuration, it consists of two divided cylinders (51) and (52), and the total rod side small area pressure receiving surface (C) is opposed to the small area pressure receiving surface (C) of the ram (3) in the cylinder (1). In a), the total anti-rod side large area pressure receiving surface (
d) on the large area pressure receiving surface (
b), and the pressure receiving surfaces (a to d) for moving the ram (3) marked nn to the advancing side and the pressure receiving surfaces (b+c) for moving it to the retreating side are made equal in area, and the speed change described later is performed. Through two switching valves (41) and (42) which also serve as means, the large area pressure receiving surfaces (b and d) are connected to each other when the mold is closed, and the small area pressure receiving surfaces (a and C) are connected to each other when the mold is opened. This forms an auxiliary cylinder (5) that equalizes the supply and output flow rates to the hydraulic pump (10). And this auxiliary cylinder (5
), each of the divided cylinders (51) and (52) comprising:
Each piston rod (50) (50) is connected to the ram (3) at a circumferentially symmetrical position on the radially outer part of the ram (3).

In this way, when the mold is closed, by setting the switching valves (41) and (42) to the positions shown in the figure, the discharge line (P) is connected to the small pressure receiving surface (a) side of the ram (3) in the cylinder (1).
Pressure oil can be introduced from the cylinder (1), and the ram (3) can be advanced at high speed. Although more oil is discharged than the amount of oil introduced, this discharged oil does not return to the suction line (T) as it is, but is injected into the large area pressure receiving surface (d) side of the auxiliary cylinder (5), and is Small area pressure receiving surface (a) in cylinder (5)
The oil discharged from the uF side is returned to the suction line (T). Then, the area relationship of each pressure receiving surface is a=c1b=d
Therefore, the imbalance in the supply and discharge flow rate in the cylinder (1) can be absorbed by the auxiliary cylinder (5), and the oil m introduced to the small area pressure receiving surface (a) side of the cylinder (1) and the auxiliary cylinder Small area pressure receiving surface (C) in (5)
The amount of oil discharged from the side is equal, and a closed circuit can be realized without any problems.

On the other hand, when opening the mold, by switching the switching valves (41) and (42) from the positions shown in the figure, the discharge line (P) is connected to the large pressure receiving surface (b) side of the ram (3) in the cylinder (1).
Pressure oil can be introduced from the cylinder (1) and the ram (3) can be moved backward at a low speed. Although less oil is discharged than the amount of oil introduced, this discharged oil does not return to the suction line (T) as it is, but is injected into the small area pressure receiving surface (C) side of the auxiliary cylinder (5), and is Large area pressure receiving surface (d
) side is returned to the suction line (T). Similarly, the area relationship of each pressure receiving surface is a:0
%b: Since it is cl, the supply H in cylinder (1)
The unbalance of the F output flow rate can be absorbed by the auxiliary cylinder (5), and the amount of oil introduced into the large area pressure receiving surface (b) side of the cylinder (1) and the large area pressure receiving surface (d) of the auxiliary cylinder (5) are ) side is equal to the amount of oil discharged from the
A closed circuit can be realized without any problems.

Therefore, while realizing a closed circuit configuration, the ram (3) can be operated at high speed when closing the mold and at low speed or with a large force when opening the mold, resulting in improved functionality. or,
It does not become long in the axial direction, and space can be saved.

Moreover, the auxiliary cylinder (5) is divided into a divided cylinder (51) (
52) and arranged symmetrically in the circumferential direction of the ram (3), the ram (3) can be operated in a well-balanced manner in the forward and backward directions.

By the way, with the above configuration, when opening the mold, the movable mold (2
) The molded product can be removed from the mold by retracting it a little, and it is more efficient and preferable to retract it at high speed afterwards. Therefore, when opening the mold, there is a low-speed mode in which the large-area pressure-receiving surface (b) side of the cylinder (1) is connected to the discharge line (P), and the small-area pressure-receiving surfaces (a and C) are connected to each other, and the auxiliary cylinder (5 ) is provided with a speed change means for switching between the small area pressure receiving surface (C) side to the discharge line (P) and the high speed mode connecting the large area pressure receiving surfaces (b and d). The speed change means includes the switching valves (41) and (4).
2) is used as is, and when the mold is first opened, each switching valve (41) and (42) are operated to a switched position relative to the position shown in the figure, and after the mold is removed, the directional switching valve (40) is While connected to the mold opening position, that is, the right boat position, each switching valve (41) (42) is operated to return to the illustrated position.

As a result, after the mold is removed, the pressure oil in the discharge line (P) is
It is introduced into the small area pressure receiving surface (C) side of the auxiliary cylinder (5), and the ram (3) can be retreated at high speed through the auxiliary cylinder (5). The large amount of oil discharged from the small area pressure receiving surface (a) side is discharged from the large area pressure receiving surface (b) in the cylinder (1).
The oil injected into the cylinder (1) and discharged from the small-area pressure-receiving surface (a) side of the cylinder (1) returns to the suction line (T), and a closed circuit can of course be realized without any problem.

In addition, the above mold clamping [in (100), code (30)
is a clamping cylinder, which is equipped with a large-diameter piston (32) mounted on a ram (3), in a mold-closing rod configuration, and equipped with a switching valve (
44), pressure oil is introduced into the left ventricle via the check valve (43), and the right ventricle is opened to drain via the pressure valve (45), thereby clamping the ram (3). When opening the mold, the switching valve (47) is switched to connect the left ventricle to the accumulator (48) via the pressure valve (46), and then the switching valve (44) is returned to communicate the left ventricle and the right ventricle. to maintain the same pressure and release the clamp. Oil accumulated in the accumulator (48) is returned to the charge line via a check valve (49).

In addition, the fixed mold (21) is equipped with an injection device f (20), which will be described later.
An ejector cylinder (22) for pellet injection from 0) is opened, and an operation hole (23) for dropping the molded product from the mold is provided, and an ejector cylinder (23) is connected to the charge line via a switching valve (25). 24) is connected.

Next, the injection device (200) will be explained.

This device (200) includes an injection cylinder (6), a large diameter rod (85) with a screw type pellet injection operating body (7) integrated in the front part, and a hydraulic motor (84) in the rear part.
) and a narrow-diameter shirt connected by splines (83)) (
An injection ram (8) having a piston (81) with a piston (82) protruding from each other is installed inside the injection ram (8). When loading pellets, the ram (8) is rotated to melt the resin taken in from the insertion port (71) in the heating cylinder (70) that covers the operating body (7), and during injection, the directional control valve ( 60) to the boat position on the left in the figure to advance the operating body (7), and after completion of injection, switch the directional control valve (60) to the boat position on the right in the figure and retreat the operating body (7). I try to let them do it.

With the above configuration, the total head side pressure receiving surface (B) is made up of two divided cylinders (91) and (92), and the rear side pressure receiving surface (A) of the ram (8) in the cylinder (6) is opposed to the total head side pressure receiving surface (B). The pressure receiving surface (A) for moving the ram (8) to the advancing side and the pressure receiving surface (B) for moving the ram (8) to the retreating side are made equal in area, and the supply and discharge to the hydraulic pump (10) is made equal to An injection auxiliary cylinder (9) is formed to equalize the flow rates. The divided cylinders (91) and (92) constituting the auxiliary cylinder (9) are arranged at circumferentially symmetrical positions on the radially outer part of the ram (8), and each piston rod (90 ) (90) in the rotational direction slip mechanism (9
0a) to said ram (8). The other rod side chambers in the cylinders (6) and (9) are both open to drain.

As a result, during injection, the pressure oil in the discharge line (P) is transferred to the pressure receiving surface on the back side of the piston (81) in the cylinder (6).
A) side, the operating body (7) can be advanced, and the same amount of oil as this introduced oil enters the auxiliary cylinder (
9) is returned to the suction line (T).

On the other hand, after the injection is completed, the pressure oil in the discharge line (P) is introduced into the pressure receiving surface (B) of the auxiliary cylinder (9), and the operating body (7) can be moved back, and the introduced oil and The same amount of oil is returned from the cylinder (8) to the suction line (T).

Therefore, a closed circuit can be realized, and there is no need to forcibly align the two rod thicknesses of the injection ram (8).The rod (85) on the operation body (7) side is thick, and the shaft (85) on the motor (84) side is thick.
82) can be made thin without any problem, and a large extrusion force can be obtained during injection, and the rigidity of the operating body (7) and the ram (8) can be ensured.

Further, as in the case of the mold clamping device (100), the auxiliary cylinder (9) is composed of divided cylinders (91, 92) and arranged symmetrically in the circumferential direction, so that a well-balanced forward and backward movement can be performed.

By the way, with the above configuration, when loading pellets, the directional switching valve (60) is in the position shown in the figure, the switching valve (80) is switched to the right position in the figure, and the hydraulic motor (84) is operated to operate the operating body (7).
) only rotates. At this time, the piston (81
), a reaction force is generated that causes the piston (81) to retreat. In order to adjust the reaction force, each cylinder (El) (
9), a resistance means consisting of a pressure valve (62) connected by a switching valve (61) is installed.

According to this, when loading pellets, the adult material on the pressure receiving surface (A) side of the ram (8) flows into the pressure receiving surface (B) side of the auxiliary 7 cylinder (9) via the pressure valve (62). Therefore, it is possible to resist the force that tends to move the ram (8) backward due to the rotational movement of the operating body (7), and it is possible to restrict the axial movement force of the ram (8).

Note that the mold clamping device and the injection device described above can be configured independently, but they may also be configured in combination as shown in the drawings. Also, each auxiliary cylinder (5) (9) is 3
It may be configured by dividing into two or more. Furthermore, mold clamping ram (3)
In addition to the direct connection type shown in the figure, it may also be configured as a toggle type.

(Effects of the Invention) As described above, in the mold clamping device of the present invention, the speed can be changed during mold closing and mold opening, and the mold clamping cylinder (1)
There is an imbalance in the amount of ta output! A closed circuit can be realized satisfactorily while improving functionality.

Further, since the auxiliary cylinders (5) and (9) are divided and arranged symmetrically, the rams (3) and (8) can be advanced and retreated in a well-balanced manner.

Furthermore, the mold clamping device is equipped with a means of changing speed when the mold is opened.
Initially, it was possible to remove the mold with strong force, speeding up subsequent movement,
The work efficiency can be improved.

Moreover, in the injection device, the zeston (
81) A closed circuit can be satisfactorily realized without making the pressure receiving areas on both sides the same.

Furthermore, since the injection device is provided with a resistance means, the moving force of the injection ram (8) can be regulated when loading pellets, and a stable loading operation can be performed.

Furthermore, the injection molding machine as a whole can have a good closed circuit configuration.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a mold clamping device and an injection device of the present invention, and an injection molding machine combining these devices, and FIG. 2 is a circuit diagram of a conventional example. (1) Mold clamping cylinder (2) Movable mold (3) Mold clamping ram (4) Fixed piston (5) Mold clamping auxiliary cylinder (6) Injection cylinder (7) Pellet injection operating body (8) Injection ram (9) Injection auxiliary cylinder (10) Hydraulic pump ( , 50) Piston rod (90) Piston rod (31) Piston (81) Piston (51, 52) Split cylinder (91, 92) ...Divided cylinder

Claims (7)

[Claims] (1) A mold clamping cylinder (1) is equipped with a single rod mold clamping ram (3) that moves the movable mold (2) forward and backward, and a fixed piston (3) that is inserted into the piston (31) side of the ram (3). 4), a small area pressure receiving surface is provided on the opposite side of the fixed piston (4), and a large area pressure receiving surface is provided in the rod side chamber of the ram (3), and the movable area is provided by the mold clamping ram (3). A mold clamping device for an injection molding machine that operates at high speed when closing the mold (2) and at low speed when opening the mold, the clamping device having a pressure receiving surface for moving the mold clamping ram (3) to the advancing side and a retreating surface. A mold clamping auxiliary cylinder (5) is formed by aligning the pressure receiving surfaces to be moved to the side to have equal areas and equalizing the discharge amount from the hydraulic pump (10) and the suction amount to the pump (10). The auxiliary cylinder (5) is arranged radially outward of the mold clamping ram (3), and the piston rod (50) of the auxiliary cylinder (5)
) is connected to the mold clamping ram (3), and each of the cylinders (1
) A mold clamping device for an injection molding machine, characterized in that a closed circuit is formed between (5) and a hydraulic pump (10). (2) The mold clamping auxiliary cylinder (5) is divided into multiple divided cylinders (
51, 52), each divided cylinder (51, 5
2. The mold clamping device for an injection molding machine according to claim 1, wherein the mold clamping rams (3) are arranged symmetrically in the circumferential direction of the mold clamping ram (3). (3) When opening the mold, the large area pressure receiving surface side of the mold clamping cylinder (1) is connected to the supply line extending from the hydraulic pump (10), and the small area pressure receiving surface side of the mold clamping cylinder (1) is connected to the mold clamping cylinder (1). A low speed mode in which the small area pressure receiving surface side of the rod side of the auxiliary cylinder (5) is connected to each other, and a low speed mode in which the small area pressure receiving surface side of the mold clamping auxiliary cylinder (5) is connected to the supply line and each of the cylinders ( 3. The mold clamping device for an injection molding machine according to claim 1, further comprising a speed change means for switching between 1) and a high speed mode in which the large-area pressure receiving surfaces of (5) are interconnected. (4) Injection in an injection molding machine in which the injection cylinder (6) has a piston (81) with pressure-receiving surfaces of different areas on both sides, and an injection ram (8) that advances and retreats the pellet injection operating body (7). A pressure receiving surface for moving the injection ram (8) to the advancing side and a pressure receiving surface for moving the injection ram (8) to the retreating side are equal in area, and the discharge amount from the hydraulic pump (10) and the pressure receiving surface for moving the injection ram (8) to the retreating side are equal in area. An injection auxiliary cylinder (9) is formed to equalize the suction amount to the injection ram (9), and this auxiliary cylinder (9) is arranged radially outward of the injection ram (8), and the piston of the auxiliary cylinder (9) An injection molding machine characterized in that a rod (90) is coupled to the injection ram (8), and a closed circuit is formed between each of the cylinders (6), (9) and a hydraulic pump (10). Injection device. (5) Connect the injection auxiliary cylinder (9) to multiple divided cylinders (
91, 92), each divided cylinder (91, 9
5. The injection device for an injection molding machine according to claim 4, wherein the injection rams (8) are arranged symmetrically in the circumferential direction of the injection ram (8). (6) Injection cylinder (6) and injection auxiliary cylinder (9)
), connect the pellet injection operating body (
The injection molding machine according to claim 4 or claim 5, further comprising a resistance means for applying a force to the injection ram (8) to counteract the reaction force acting on the injection ram (8) when pellets are loaded into the injection ram (8). Injection device in molding machine. (7) An injection molding machine comprising the mold clamping device in the injection molding machine according to claim 1 and the injection device in the injection molding machine according to claim 4.