JP2018126982A - Injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an apparatus compact and simple and simplify an actuation.SOLUTION: An injection molding machine 1 has a hydraulic chamber 7 of a hydraulic cylinder 6 connected with a first plate 4, and is provided with an actuation plate 8 and a cylinder rod 9 in the hydraulic chamber 7. The first plate 4 forms a second driving mechanism 21 connected to a second plate 5 via a guide bar 13. A one way driving of the hydraulic cylinder 6 pushes to move a movable plate 12 via the cylinder rod 9 and brings a movable mold 3 into contact with a stationary mold 2 via a first driving mechanism 19 provided with the movable plate 12, an ejector plate 16, and a movable platen 14. A further one way driving of the hydraulic cylinder 6 actuates a plunger 25 of a first heating cylinder 24 via a second plate 5 to inject a molten resin into a gap between the movable mold 3 and the stationary mold 2 clamped together. The hydraulic cylinder, the first driving mechanism, the movable mold, the stationary mold, the second driving mechanism, and the first heating cylinder are linearly arranged.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an injection molding machine that manufactures a molded product by injecting molten resin into a mold and taking it out after solidification, and particularly relates to an injection molding machine for manufacturing a small molded product. .

Conventional injection molding machines require separate drive devices such as hydraulic cylinders and ball screws for each operation such as mold opening / closing, injection, projecting of a molded product, screw rotation, nozzle advancement, and the like. Therefore, since the injection molding machine becomes complicated and large, there is a problem that the installation space for the machine becomes large with respect to the size of the molded product to be manufactured, which is not efficient. Further, since the structure of the injection molding machine is complicated, there are many consumable parts such as airtight parts and bearings, which makes maintenance difficult, and the control system becomes complicated, leading to failure factors and poor operability.
For example, in the injection molding machine of Patent Document 1, a hydraulic actuator is provided on each axis of mold clamping, ejector, nozzle advancement, and plunger rotation. The injection molding machine of Patent Document 2 is provided with an electric actuator on all axes.

  On the other hand, in the injection molding machine described in Patent Document 3, a single motor is connected to the mold clamping portion via a guide roller and a toggle joint, and from the motor described above via a connection link and a toggle joint. It is connected to the injection part and linked to each other. Thus, mold clamping and injection are continuously performed by driving a single motor.

Japanese Examined Patent Publication No. 7-55530 Japanese Patent No. 3556262 JP-A-8-142140

  However, the above-described injection molding machine of Patent Document 3 has a structure in which a drive source, a mold clamping unit, and an injection unit are installed in parallel. Therefore, the drive source is connected to the mold clamping part via the linear motion cam, guide roller, and toggle joint, and is connected to the injection part via the rack, connection link, and toggle joint, so that the driving force can be transmitted. The direction change is necessary, and the connecting mechanism and the interlocking operation are complicated, and there is a disadvantage that it does not contribute to downsizing of the apparatus.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an injection molding machine that achieves downsizing and simplification of the apparatus and simplification of operation.

An injection molding machine according to the present invention is an injection molding method in which a molten resin is injected into a gap formed by bringing a fixed mold and a movable mold into contact with each other, and a molded product is obtained by taking out after being solidified. In the machine, the first drive source, the first drive mechanism for bringing the movable mold into contact with the fixed mold by driving the first drive source in one direction, and the first drive source moving by further driving in one direction. It is characterized by comprising a second drive mechanism, and an injection means for injecting molten resin into the gap between the movable mold and the fixed mold which are closed in conjunction with the second drive mechanism.
According to the injection molding machine of the present invention, the first drive source is driven in one direction so that the movable mold is brought into contact with the fixed mold via the first drive mechanism, and the mold is closed. Is further driven in one direction to operate the injection means via the second drive mechanism to inject and fill the molten resin into the gap between the movable mold and the fixed mold to produce a molded product.

Moreover, it is preferable that the first drive source, the first drive mechanism, the movable mold and the fixed mold, the second drive mechanism, and the injection unit are arranged in a straight line.
By arranging each configuration of the injection molding machine in a straight line, the configuration becomes simple. By sequentially driving the first drive source in one direction, mold clamping and injection of molten resin can be performed. The operation is simple.

Further, the movable mold is separated from the fixed mold through the first drive mechanism by driving in the reverse direction of the first drive source, and the ejector member provided in the first drive mechanism is further operated to form the molded product from the movable mold. It is preferable to protrude.
By driving the first drive source in the direction opposite to the one direction, the second drive mechanism is separated from the injection means, the movable mold is separated from the fixed mold, and the ejected product is sequentially ejected by the ejector member. It can be carried out.

The injection means preferably includes a first heating cylinder, a plunger or screw provided in the hollow portion of the first heating cylinder, and a resin reservoir provided on the front side of the plunger or screw.
When the plunger is installed in the injection means, the molten resin in the resin reservoir is injected into the gap in conjunction with the second drive mechanism, and when the screw is provided, the resin material is melted and injected into the gap.

The injection means includes a plunger, and is provided with a plasticizing device that is connected to the injection means and melts the resin material. The plasticizing device includes a second heating cylinder connected to the resin reservoir, and a second heating cylinder. It is preferable to include a screw that is provided in the hollow portion of the heating cylinder and plasticizes the resin material, a backflow prevention member that is provided on the front side of the screw, and a second drive source that drives the screw.
By operating the screw in the second heating cylinder by driving the second drive source, the resin material can be plasticized and supplied to the resin reservoir of the first heating cylinder to prepare for the next injection, and the injection means The backflow prevention member can prevent the molten resin in the resin pool from flowing back during operation.

The second drive mechanism includes a first mediating member that is linked to driving of the first drive source, and a second mediating member that is coupled to the first mediating member via the coupling member. The injection means may be interlocked with each other.
The second mediating member of the second drive mechanism is interlocked by driving the first drive source in one direction, and the molten resin is injected into the gap from the injection means.

Moreover, it is preferable to further include an elastic member provided between the stationary platen fixed to the stationary mold and the second mediating member and set with an adjustable pressure.
With the movable mold and the fixed mold closed, the mold clamping force increases due to the increased pressure applied by the elastic member in proportion to the action of injecting molten resin from the injection means into the gap by the operation of the second mediating member. Therefore, molding defects such as burrs can be prevented.

  According to the injection molding machine according to the present invention, the movable mold and the stationary mold can be closed and the resin can be injection-molded by one-way driving of the first drive source, so that the operation is simplified and the injection molding is performed. The device can be downsized and simplified, and the number of parts is reduced and maintenance is easy.

It is a front view which shows the injection molding machine by 1st embodiment of this invention, and is a figure of a mold opening completion state. It is a figure of the mold closing completion state of the injection molding machine by a first embodiment. It is a figure of the injection completion state of the injection molding machine by a first embodiment. It is a front view which shows the injection molding machine by 2nd embodiment. It is a front view which shows the injection molding machine by 3rd embodiment.

Hereinafter, an injection molding machine according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the injection molding machine by 1st embodiment is demonstrated based on FIG. 1 thru | or FIG. In the injection molding machine 1 shown in FIG. 1, a first plate 4 and a second plate 5 are arranged in parallel and opposite to each other with a fixed mold 2 and a movable mold 3 in between. For example, a hydraulic cylinder 6 is connected to the back side of the first plate 4 as a first drive source.
The hydraulic cylinder 6 is installed in a hollow hydraulic chamber 7 filled with hydraulic pressure so that an operating plate 8 can move forward and backward in a liquid-tight manner. The hydraulic chamber 7 is partitioned into a first chamber 7 a and a second chamber 7 b by the operating plate 8. Yes. A cylinder rod 9 fixed to the operating plate 8 extends through the hydraulic chamber 7 and the first plate 4. In the hydraulic chamber 7, for example, a known hydraulic passage and a hydraulic pump communicating with the first chamber 7a and the second chamber 7b on both sides of the operation plate 8 are installed, but they are omitted in the drawing. The first chamber 7a and the second chamber 7b may be a tank release type in which hydraulic pressure is separately supplied. Moreover, the first plate 4 is connected to the housing of the hydraulic chamber 7, and the cylinder rod 9 passes through the wall surface of the hydraulic chamber 7 and the first plate 4 and is connected to the movable plate 12 of the movable mold 3. .

  The first plate 4 and the second plate 5 are connected via a plurality of, for example, two or four guide bars 13. A movable plate 14 for fixing and supporting the movable mold 3 is installed on the second plate 5 side of the movable plate 12, and an ejector plate 16 connected with an ejector pin 15 as an ejector member between the movable plate 12 and the movable plate 14. is set up. The movable plate 12, the ejector plate 16, and the movable platen 14 are slidably supported through the guide bar 13.

The ejector pin 15 installed on the ejector plate 16 penetrates the movable platen 14 and the movable mold 3 and can advance into the cavity 23 which is a gap formed by the clamped movable mold 3 and the fixed mold 2. Has been. In addition, a coil spring 18 as an elastic member is attached to the ejector pin 15 between the ejector plate 16 and the movable platen 14. Therefore, when the movable platen 14 moves forward, the coil spring 18 extends and the ejector pin 15 automatically moves backward.
The movable plate 12, the ejector plate 16, and the movable plate 14 constitute a first drive mechanism 19. Further, the first plate 4, the second plate 5, and the guide bar 13 constitute a second drive mechanism 21.

The first plate 4 is provided with pins 20, and the movable plate 12 facing the pins 20 is formed with a through hole 12 a that can penetrate the pins 20. When the movable platen 14 moves backward toward the hydraulic cylinder 6 and the ejector plate 16 is pushed by the pin 20, the tip of the ejector pin 15 protrudes into the movable mold 3 and the molded product S held by the movable mold 3 protrudes. Is done.
In addition, the movable mold 3 and the fixed mold 2 are formed with cavities 23 that can be filled with molten resin in a closed state where they are in contact with each other. For example, the movable mold 3 is formed with a convex portion 3a, and the fixed mold 2 is formed with a concave portion 2a for fitting the convex portion 3a. With the movable mold 3 and the fixed mold 2 in contact with each other, a molten resin is filled and solidified in the cavity 23 between the convex portion 3a and the concave portion 2a to form a molded product.

  The fixed mold 2 is fixed to a fixed plate 22 provided on the second plate 5 side. The first heating cylinder 24 is fixed to a hole 22a formed in the center of the fixed platen 22. The injection nozzle 24 a at the tip of the first heating cylinder 24 communicates with the concave portion 2 a of the fixed mold 2 so that molten resin can be filled into the cavity 23. In addition, the first heating cylinder 24 is connected to the stationary platen 22 via a heat insulating plate 26.

The first heating cylinder 24 is inserted with a plunger 25 capable of advancing and retracting to inject molten resin stored in a hollow portion inside thereof, and its rear end portion is fixed to the second plate 5 with a male screw, a fixing nut 27 and the like. Has been. A resin reservoir 24b capable of storing a molten resin is formed in the hollow portion of the first heating cylinder 24 on the front side of the plunger 25, and the resin reservoir 24b communicates with the injection nozzle 24a.
The hydraulic cylinder 6, the first drive mechanism 19, the fixed mold 2, the movable mold 3, the second drive mechanism 21, and the first heating cylinder 24 are linearly arranged.

A second heating cylinder 28 is connected in a direction substantially orthogonal to the first heating cylinder 24, and a screw 30 for melting the resin material is inserted into the hollow portion of the second heating cylinder 28. A second drive source 31 such as a motor for rotationally driving the screw 30 is installed at the rear end of the screw 30, and a resin material is supplied into the second heating cylinder 28 near the rear end of the second heating cylinder 28. A hopper 32 is installed. The second heating cylinder 28, the screw 30, the second drive source 31 and the hopper 32 constitute a plasticizing device 38.
Moreover, a heater (not shown) is incorporated in the substantially cylindrical peripheral wall that partitions the hollow portion of the second heating cylinder 28. The molten resin can be filled into the resin reservoir 24b of the first heating cylinder 24 by advancing while kneading by the rotation of the screw 30 while melting the resin material put into the second heating cylinder 28 from the hopper 32.

  Moreover, in the second heating cylinder 28, a discharge port 30 a communicating with the resin reservoir 24 b of the first heating cylinder 24 is formed on the tip side of the screw 30. A check valve 33 is installed as a backflow prevention member in the resin pool space on the tip end side of the screw 30 of the second heating cylinder 28. As a result, the molten resin extruded from the second heating cylinder 28 into the resin reservoir 24b of the first heating cylinder 24 is prevented from returning into the second heating cylinder 28 by pressure when being injected by the plunger 25.

The pressurizing adjustment screw 34 having one end fixed to the stationary platen 22 is inserted into a through hole 5a formed in the second plate 5 at the other end and a male screw is formed. For example, two adjustment nuts 35 are overlapped and screwed to be fixed to the second plate 5. In addition, an adjustment spring 36 is attached to the pressurizing adjustment screw 34 as an elastic member between the fixed plate 22 and the second plate 5 in a compressed state.
The fixed mold 2 is pressed against the movable mold 3 via the fixed plate 22 by the adjustment spring 36. Further, by adjusting the tightening position of the adjustment nut 35, the mold clamping pressure between the fixed mold 2 and the movable mold 3 by the adjustment spring 36 can be adjusted via the second plate 5.

The injection molding machine 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
The injection molding machine 1 shown in FIG. 1 is in a mold opening completion state in which the hydraulic cylinder 6 is most retracted, the first drive mechanism 19 is positioned on the first plate 4 side, and the ejector plate 16 is pushed by the pin 20 to eject the ejector. As the pin 15 advances, the molded product S protrudes from the movable mold 3 and falls. The second drive mechanism 21 is in the retracted position.

From this state, the forward movement of the injection molding machine 1 is started. That is, when the hydraulic pressure is supplied to the first chamber 7a of the hydraulic cylinder 6, the operation plate 8 is advanced (moves to the right in the figure: first stage) and is pushed by the cylinder rod 9 to perform the first drive. The movable mold 3 moves to the right together with the mechanism 19 and the ejector pin 15 is retracted. Further, the hydraulic pressure is supplied to the first chamber 7a of the hydraulic cylinder 6, and as shown in FIG. 2, the movable mold 3 comes into contact with the fixed mold 2 as the first drive mechanism 19 and the movable mold 3 move forward. The mold is closed.
Therefore, the operation plate 8 does not advance further to the movable mold 3 side. In addition, the fixed mold 2 is supported in a pressed state by a pressurized adjustment spring 36.

Next, when hydraulic pressure is supplied to the first chamber 7a of the hydraulic cylinder 6, the hydraulic chamber 7 of the hydraulic cylinder 6 moves away from the movable mold 3 with respect to the operation plate 8 in a stopped state (left side in the figure). Move to. This operation can be said to be relatively advanced in the hydraulic chamber 7 (moving rightward: second stage) in the hydraulic chamber 7.
As a result, the hydraulic chamber 7 and the first plate 4 move in a direction away from the movable mold 3, so that the second plate 5 is moved in the direction of the fixed mold 2 via the guide bar 13 and the adjustment spring 36 is moved. Compress further.

Then, as shown in FIG. 3, the plunger 25 is pushed by the second plate 5 and advances in the first heating cylinder 24, so that the molten resin in the resin reservoir 24b is pushed and enters the cavity 23 through the injection nozzle 24a. Is injected into. Due to the movement of the second plate 5, the adjustment spring 36 is further compressed as the molten resin is injected by the plunger 25, and the clamping force of the fixed mold 2 and the movable mold 3 gradually increases. At that time, since the progress of the injection of the molten resin is proportional to the increase of the clamping force, it is possible to prevent the occurrence of molding defects such as so-called burrs.
Then, when a predetermined amount of molten resin is injected into the cavity 23, the forward movement of the hydraulic cylinder 6 is terminated and held in a stopped state for a predetermined time. This position is set as the forward movement position of the second drive mechanism 21. As a result, the resin is solidified in the cavity 23 of the movable mold 3 and the fixed mold 2 in the mold clamped state.

  Next, after a predetermined time elapses, the injection molding machine 1 shifts to a backward operation. That is, the hydraulic pressure is supplied to the second chamber 7b in the hydraulic cylinder 6, and the hydraulic chamber 7 of the hydraulic cylinder 6 moves in the reverse direction to the right, that is, in the direction of the movable mold 3 (upper right in the figure: third stage). . Then, the first plate 4 and the second plate 5 move to the right, and the plunger 25 also moves backward in the hollow portion of the first heating cylinder 24 together with the second plate 5 to the retracted position in FIG. The volume of the resin reservoir 24b of the cylinder 24 is increased to the initial position.

  On the other hand, the second drive source 31 is driven simultaneously with the reverse drive of the hydraulic cylinder 6, and the resin material in the hopper 32 is supplied into the hollow portion of the second heating cylinder 28 by the rotation of the screw 30 to be melted and plasticized. Is done. The melted resin is pushed forward in the second heating cylinder 28 by the rotation of the screw 30 and flows into the resin reservoir 24 b in the first heating cylinder 24. When the second drive mechanism 21 is retracted to the retracted position shown in FIG. 1, the second drive source 31 is stopped, and the plasticizing operation in the plasticizing apparatus is completed.

Thereafter, when the resin in the cavity 23 of the movable mold 3 and the fixed mold 2 in the mold-clamped state is sufficiently solidified, hydraulic pressure is supplied to the second chamber 7b of the hydraulic chamber 7 so that the operation plate 8 is hydraulic. The movable mold 3 is opened from the fixed mold 2 by moving in a direction away from the fixed mold 2 in the chamber 7 (left direction in the figure: fourth stage). Further, the movement of the operating plate 8 moves the first drive mechanism 19 in a direction approaching the first plate 4, and the pin 20 of the first plate 4 passes through the through hole 12 a of the movable plate 12 and pushes the ejector plate 16. The ejector pin 15 protrudes into the movable mold 3 and the molded product S falls.
By repeating the operation described above, injection molding can be repeated.

  As described above, according to the injection molding machine 1 of the present embodiment, the hydraulic cylinder 6, the first drive mechanism 19, the movable mold 3, the fixed mold 2, the second drive mechanism 21, and the first heating cylinder 24 are linear. The mold opening / closing operation and the injection operation can be continuously performed by forward / reverse driving of the hydraulic cylinder 6. Therefore, the mechanical structure of the injection molding machine 1 is simple and can be miniaturized, and the number of parts is small and maintenance is easy. In addition, since the mold opening / closing operation and the injection operation can be performed by forward / reverse movement of the hydraulic cylinder 6, the operation is simple.

  The injection molding machine 1 according to the present invention is not limited to that according to the above-described embodiment, and can be appropriately changed or replaced without departing from the gist of the present invention. Although other embodiments and modifications of the present invention will be described below, the same or similar members and parts as those of the injection molding machine 1 according to the above-described embodiment will be described using the same reference numerals.

FIG. 4 shows an injection molding machine 1A according to the second embodiment of the present invention.
In the injection molding machine 1 </ b> A according to the present embodiment, a fixed plate 40 is connected to one end of the guide bar 13 instead of the first plate 4, and a bearing 41 is mounted in the central hole 40 a of the fixed plate 40. A ball screw shaft 42 is disposed through the shaft. One end of the ball screw shaft 42 is fixed coaxially with the pulley 43, and the other end is screwed into a screw hole of the ball nut 44.
The pulley 43 is configured to be interlocked with a driving pulley 46 fixed to the output shaft of the driving motor M by a belt (not shown). The ball nut 44 is supported by an arm portion 47 extending from the movable plate 12. The fixed plate 40, the pulley 43, the drive motor M, and the drive pulley 46 can be reciprocally moved in the longitudinal direction of the ball screw shaft 42, and may be mounted on a substrate or the like.

  Therefore, in the injection molding machine 1 </ b> A according to the second embodiment, when the drive motor M is rotated in one direction from the mold opening completion position similar to that in FIG. 1, the ball screw shaft 42 rotates through the pulley 43. The rotation of the ball screw shaft 42 transmits a driving force to the first driving mechanism 19 including the movable plate 12 via the ball nut 44, and the first driving mechanism 19 moves along the guide bar 13 in the direction of the fixed mold 2. To do. Then, the first drive mechanism 19 stops when the movable mold 3 shown in FIG.

Thereafter, when the drive motor M is further rotated in the same direction, the ball screw shaft 42, the fixed plate 40, the pulley 43, the drive motor M, and the drive pulley 46 are separated from the fixed mold 2 with respect to the ball nut 44 (FIG. 4). To the left). As a result, the second driving mechanism 21 connected to the fixed plate 40 moves in the same direction, and the molten resin is closed from the resin reservoir 24b of the first heating cylinder 24 by the plunger 25 pushed by the second plate 5 at the forward movement position. It is injected into the cavity 23 of the movable mold 3 and the fixed mold 2 in the state.
The subsequent operation is the same as that of the injection molding machine 1 according to the first embodiment, and the drive motor M is rotated in the reverse direction after the injection of the molten resin is completed. As a result, the second drive mechanism 21 is returned to the retracted position shown in FIG. 4, the movable mold 3 is released from the fixed mold 2, and the molded product S can be pushed out by the ejector pins 15.

Next, FIG. 5 is a view showing an injection molding machine 1B according to the third embodiment of the present invention.
The basic configuration of the injection molding machine 1B according to the present embodiment is the same as that of the injection molding machine 1 according to the first embodiment, and the differences are as follows.
That is, instead of the second plate 5, for example, a substantially U-shaped holding member 50 in a cross-sectional view is provided, and the pressurization adjusting screw 34 and the guide bar 13 are fitted and inserted into the upper and lower front end portions 50 a sandwiching the opening. The nut 35 and the fixing nut 27 are connected to the holding member 50 respectively. The holding member 50 is fixed with a second drive source 31 for rotationally driving a screw 30 described later. The screw 30 rotates to melt the resin material and send it to the resin reservoir 24b, and the screw 30 injects the molten resin in the resin reservoir 24b into the cavity 23 as the second drive mechanism 21 advances.

The first heating cylinder 24 provided in the hole 22a of the fixed plate 22 extends rearward and a hopper 32 is installed in the vicinity of the rear part. A screw 30 is mounted in the hollow portion having the resin reservoir 24 b of the first heating cylinder 24, and the rear end portion thereof is connected to a second drive source 31 provided on the holding member 50. The first heating cylinder 24 according to the present embodiment also serves as a plasticizing device.
In the present embodiment, during injection molding, the resin material supplied from the hopper 32 is extruded forward while being plasticized and melted by the rotation of the screw 30, and the second drive mechanism 21 moves forward to push the injection nozzle 24 a from the resin reservoir 24 b by the screw 30. Through the cavity 23.

  As described above, in the present embodiment, the hydraulic cylinder 6 as the first drive source, the first drive mechanism 19, the movable mold 3, the fixed mold 2, the second drive mechanism 21, the first heating cylinder 24, and plasticization. Since the entire injection molding machine 1B comprising the apparatus is arranged in a straight line, the configuration and operation are simplified, so that the number of parts is further reduced, and maintenance is further facilitated.

In the first and third embodiments described above, the hydraulic cylinder 6 is provided as the first drive source in the injection molding machines 1 and 1B, and in the second embodiment, the ball screw mechanism including the drive motor M is provided as the first drive source. However, the present invention is not limited to such a configuration. A servo motor, an induction motor, or the like may be used as the first drive source.
In the present invention, the first plate 4 and the fixing plate 40 are included in the first mediation member, and the second plate 5 and the holding member 50 are included in the second mediation member. The guide bar 13 is included in the connecting member. The first heating cylinder 24 and the second heating cylinder 28 are included in the injection means.

1, 1A, 1B injection molding machine
2 fixed mold 3 movable mold 4 first plate 5 second plate 6 hydraulic cylinder 8 operation plate 13 guide bar 14 movable plate 19 first drive mechanism 21 second drive mechanism 22 fixed plate 25 plunger 30 screw 34 pressure adjusting screw 35 Adjustment nut 36 Adjustment spring 38 Plasticizing device M Drive motor

Claims (7)

In an injection molding machine in which a molten resin is injected into a gap formed by bringing a fixed mold and a movable mold into contact with each other, and a molded product is obtained by taking out after solidifying,
A first drive source;
A first drive mechanism for bringing the movable mold into contact with the fixed mold by driving the first drive source in one direction;
A second drive mechanism that moves by further driving in one direction of the first drive source;
An injection molding machine comprising: injection means for injecting molten resin into a gap between the movable mold and the fixed mold that are closed in conjunction with the second drive mechanism.   The first drive source, the first drive mechanism, the movable mold and the fixed mold, the second drive mechanism, and the injection unit are arranged in a straight line. Injection molding machine.   When the first drive source is driven in the reverse direction, the movable mold is separated from the fixed mold via the first drive mechanism, and an ejector member provided in the first drive mechanism is operated to remove the movable mold from the movable mold. The injection molding machine according to claim 1 or 2, wherein the molded product is protruded.   The injection means includes a first heating cylinder, a plunger or screw provided in a hollow portion of the first heating cylinder, and a resin reservoir provided on the front side of the plunger or screw. 4. The injection molding machine described in any one of 3 above. The injection means includes a plunger, and is provided with a plasticizing device connected to the injection means to melt the resin material,
The plasticizing device is provided in a second heating cylinder connected to the resin reservoir, a screw provided in a hollow portion of the second heating cylinder to plasticize a resin material, and a front side of the screw. The injection molding machine described in Claim 4 provided with the backflow prevention member and the 2nd drive source which drives the said screw. The second drive mechanism includes a first mediation member that is interlocked with driving of the first drive source, and a second mediation member that is coupled to the first mediation member via a coupling member,
The injection molding machine according to any one of claims 1 to 5, wherein the injection means is interlocked by the second mediating member.   The injection molding machine according to claim 6, further comprising an elastic member provided between the stationary platen fixed to the stationary mold and the second mediating member and having an adjustable pressurization set. .

Images