JP2022165769A - Injection molding machine, and method for controlling injection molding machine - Google Patents

Abstract

To obviate the need for largely opening a mold at the time of taking out a molded article, thus to suppress elongation and enlarging of a total length of an apparatus or a mold opening/closing mechanism.SOLUTION: In an injection molding machine 11, an intermediate platen 25 is provided between a first platen 20 to be installed with a first mold 19 and a second platen 16 installed with a second mold 15, wherein the intermediate platen 25 is rotatable around a shaft 28 orthogonal to a mold opening/closing direction C and has mold installation faces 25a and 25b on both sides to be installed with intermediate molds 21 and 22. Mold clampings between the first mold 19 and the intermediate mold 21 and between the second mold 15 and the intermediate mold 22 are simultaneously carried out. In such an injection molding machine, an ejector mechanism 50 is provided on the intermediate molds 21 and 22 or the intermediate platen 25. The injection molding machine has a take-out mode B in which the ejector mechanism 50 is actuated at a position where the intermediate molds 21 and 22 do not directly oppose to the fist mold 19 and the second mold 15, to take out a molded article P2.SELECTED DRAWING: Figure 2

Description

In the present invention, between a first plate to which a first mold is attached and a second plate to which a second mold is attached, a plate which is rotatable about an axis orthogonal to the mold opening/closing direction and which is provided on both sides of the plate is provided. An injection molding machine in which an intermediate plate is provided on the mold mounting surface of the mold mounting surface to which the intermediate mold is attached, and the first mold and the intermediate mold, and the second mold and the intermediate mold are simultaneously clamped, and the injection molding machine The present invention relates to a method of controlling a molding machine.

Conventionally, between a first plate to which a first mold is attached and a second plate to which a second mold is attached, metal plates on both sides which are rotatable about an axis perpendicular to the mold opening/closing direction are placed. As an injection molding machine in which an intermediate plate to which an intermediate mold is attached is provided on the mold mounting surface, and clamping of the first mold and the intermediate mold and between the second mold and the intermediate mold are performed simultaneously, Patent Documents 1 is known. Patent Document 1 describes that, as in the example of deep molding shown in FIG. 6, the distance between one mold is made larger than the distance between the other molds to take out the molded product. It is

However, even in the example of deep molding shown in FIG. 6 of Patent Document 1, there is a need for a space capable of extracting the molded product from the core mold portion of the intermediate mold and an extractor to enter between the molds when the molds are opened. There is no change in the need for a space where the molding can be done, and it was necessary to open a large gap between the molds on the side where the molded product is taken out. Therefore, the structure of an injection molding machine that can handle this requires a large maximum mold opening amount for the movable platen. It had to be big. Even if deep molded products are rarely molded, the mold clamping device of an injection molding machine with a large maximum mold opening amount of the movable platen as described above is used for molding deep molded products. I had to prepare.

JP 2020-66185 A

Other problems and novel features will become apparent from the description of the specification and the accompanying drawings.

In the injection molding machine according to claim 1 of the present invention, between a first board to which the first mold is attached and a second board to which the second mold is attached, the It is rotatable around an axis, and an intermediate plate is provided on both sides of the mold mounting surface to which the intermediate mold is attached, and the first mold and the intermediate mold, and the second mold and the intermediate mold is performed simultaneously, the intermediate mold or the intermediate plate is provided with an ejector mechanism, and the ejector mechanism is operated at a position where the intermediate mold does not face the first mold and the second mold. It has a take-out mode for taking out the molded product.

According to the injection molding machine of the present disclosure, there is no need to widen the mold when taking out a molded product such as a deep molded product, and it is possible to suppress an increase in the overall length of the device or the mold opening/closing mechanism.

1 is a schematic plan view showing a state of an injection molding machine according to an embodiment of the present invention when the mold is opened; FIG. FIG. 2 is a side view showing a state of the injection molding machine according to the embodiment of the present invention when taking out a molded product; It is a figure which shows each take-out mode of the injection molding machine of embodiment of this invention.

An injection molding machine 11 (hereinafter abbreviated as injection molding machine 11) for composite molded products according to an embodiment of the present invention will be described with reference to FIG. The injection molding machine 11 is a molding machine that molds a composite molded product using a plurality of resin materials, and includes a mold clamping device 12 and a first injection device 13 and a second injection device 13 provided on both sides of the mold clamping device 12, respectively. The injection device 14 constitutes a basic part. A mold clamping device 12 of an injection molding machine 11 has a fixed platen 20 as a first plate to which a fixed mold 19 as a first mold is attached, and a movable mold 15 as a second mold. Between the movable platen 16 which is the second platen, intermediate molds are rotatable around an axis (rotating shaft 28) perpendicular to the mold opening/closing direction C, and are mounted on both mold mounting surfaces 25a and 25b. 21 and 22 are attached to an intermediate plate 25, and the fixed mold 19 as the first mold and the intermediate mold 21 or 22, the movable mold 15 as the second mold and the intermediate mold 22 or 21 are provided. are clamped at the same time.

Mold clamping cylinders 23 (only one mold clamping cylinder 23 is shown in cross section in the schematic plan view of FIG. 1) are provided near the four corners of the stationary platen 20, and the rams of the mold clamping cylinders 23 also serve as tie bars 24. . The mold clamping cylinder 23 is a two-way actuating cylinder, and is provided with a large-area mold clamping oil chamber 23a on the side of the tie bar 24 in the stationary platen 20, and on the side opposite to the tie bar (first injection device side). is provided with a mold opening oil chamber 23b having a small area.

A plurality of half-nuts 29 are engaged with portions far from the mold clamping cylinder 23 (on the movable platen 16 side) of the four tie bars 24 provided in parallel from the fixed platen 20 toward the movable platen 16 side. A locking portion 24a formed of a concave groove is provided over a predetermined length. The movable platen 16 has tie bars 24 inserted through holes formed in the vicinity of its four corners, and is moved in the mold opening/closing direction C on rails such as linear motion guides arranged on the base 17 . The half nut 29 is arranged around the hole through which the tie bar 24 is inserted on the surface of the movable platen 16 opposite to the fixed platen, and can be engaged with and disengaged from the locking portion 24a of the tie bar 24. It has become.

In this embodiment, the stationary mold 19 attached to the stationary platen 20 has a flow path such as a hot runner for filling a cavity (not shown) with molten resin injected from the first injection device 13 . In this embodiment, the fixed mold 19 is a cavity mold having a concave cavity surface 19a and does not have an ejector mechanism. However, the fixed mold 19 may be a core mold having a convex cavity surface, and may also be provided with an ejector mechanism.

Next, the intermediate member 18, the intermediate plate 25, and the intermediate molds 21 and 22 will be explained. An intermediate member 18 is disposed movably in the mold opening/closing direction C between a fixed platen 20 to which the fixed mold 19 is attached and a movable platen 16 to which the movable mold 15 is attached. The intermediate member 18 includes an upper frame 26 inserted through the upper two tie bars 24 and a lower frame 27 (not shown in FIG. 1) which is inserted through the lower two tie bars 24 and supported on the base 17. ). As shown in FIG. 2, a rotating shaft 28 is provided between an upper frame 26 and a lower frame 27 in a vertical direction (perpendicular to the mold opening/closing direction C) and is rotatably held by bearings (not shown). An intermediate plate 25 is fixed to the shaft 28 . A servomotor 34 for rotating the intermediate plate 25 is attached to either the upper frame 26 or the lower frame 27 of the intermediate member 18 . An intermediate plate 25, which is a part of the intermediate member 18, is a substantially rectangular plate having a predetermined thickness, and an intermediate mold 21 and an intermediate mold 22 are attached to mold mounting surfaces 25a and 25b on both sides thereof. It is designed to be Note that the upper frame 26 is not essential in the present invention.

As shown in FIGS. 1 and 2, the intermediate member 18 is provided with a first positioning mechanism 35 that locks the rotation of the intermediate plate 25 . Specifically, a driving source is provided on the side of the lower frame 27 far from the center of the rotation shaft 28 so that the positioning pin 38 of the first positioning mechanism 35 projects upward from the lower frame 27 . In this embodiment, the rod of the hydraulic cylinder 39 serves as the positioning pin 38 . Further, on the lower surface of the intermediate plate 25, there is a positioning hole into which the positioning pin 38 is inserted at a position aligned with the positioning pin 38 in the vertical direction when the intermediate plate 25 faces the fixed plate 20 or the like and stops rotating. 40 are formed. The first positioning mechanism 35 is for fixing the intermediate plate 25 and the intermediate molds 21 and 22 in the first take-out mode A, which will be described later.

As shown in FIG. 2, a bracket 46 having a predetermined length is fixed to the lower frame 27 from the center of the rotary shaft 28 toward either the fixed platen side or the movable platen side in the mold opening/closing direction C. there is The bracket 46 is provided with a drive source for projecting the positioning pin 47 of the second positioning mechanism 36 upward from the lower frame 27 . In this embodiment, the rod of the hydraulic cylinder 49 serves as the positioning pin 47 . The positioning hole 40 on the intermediate board 25 side into which the positioning pin 47 is inserted is shared with the positioning hole 40 into which the positioning pin 38 of the first positioning mechanism 35 is inserted. However, a separate positioning hole may be provided on the lower surface of the intermediate board 25 . The second positioning mechanism 36 is for fixing the intermediate plate 25 and the intermediate molds 21 and 22 in a second extraction mode B, which will be described later. The second positioning mechanism may be an elevating stopper that stops the intermediate plate 25 from rotating.

A motor may be used as the drive source for the first positioning mechanism 35 and the second positioning mechanism 36 . At least one of the first positioning mechanism 35 and the second positioning mechanism 36 may be provided on the upper frame 26 of the intermediate member 18 . In that case, the positioning holes into which the positioning pins are inserted are of course provided on the upper surface side of the intermediate plate 25 . Moreover, in the present invention, the second positioning mechanism 36 is not essential. By controlling the rotation of the intermediate plate 25 by the servo motor 34, the mold mounting surfaces 25a and 25b of the intermediate plate 25 are stopped in parallel with the mold opening/closing direction C, and the servo motor 34 is put into a servo lock state. Therefore, the intermediate board 25 can be prevented from being rotated unexpectedly.

In this embodiment, the intermediate molds 21 and 22 respectively attached to the mold mounting surfaces 25a and 25b on both sides of the intermediate plate 25 have the same shape. The intermediate molds 21 and 22 are core molds having convex cavity surfaces 21a and 22a and are equipped with an ejector mechanism 50 inside. The ejector pin 51 of the ejector mechanism 50 can protrude from the cavity surfaces 21a and 22a on the front surfaces of the projections. Part or all of the drive mechanism of the ejector mechanism 50 may be provided inside the intermediate plate 25 . In this case, the drive mechanism of the ejector mechanism of the intermediate platen 25 ejects the ejector pin 51 of the intermediate mold 21, 22 which holds the composite molded product P2 of either one of the intermediate molds 21, 22. Needless to say. In FIGS. 1 and 2, the driving source of the ejector mechanism is described as using a hydraulic cylinder, but a motor such as a servomotor may be used. Also, when the ejector mechanism 50 is provided inside the intermediate plate 25, the type of drive source can be freely selected as in the case where the ejector mechanism 50 is provided in the intermediate molds 21 and 22 described above.

In this embodiment, the movable mold 15 attached to the movable platen 16 has a channel such as a hot runner for filling a cavity (not shown) with molten resin injected from the second injection device 14 . In this embodiment, the movable mold 15 is a cavity mold having a concave cavity surface 15a and does not have an ejector mechanism. However, the movable mold may be a core mold having a convex cavity surface, and may be provided with an ejector mechanism.

Next, the first mold opening/closing mechanism 30 for moving the movable platen 16 and the movable mold 15 to open and close the molds will be described. A servo motor 31 is fixed to a bracket provided on the stationary platen 20 (or on the base 17). A ball screw 32 is rotatably supported by the bracket of the stationary platen 20 (or the base 17) by the servomotor 31. As shown in FIG. The ball screw 32 is connected directly or via a belt to the drive shaft of the servomotor 31 to transmit the driving force. A ball screw nut 33 is fixed to a bracket provided on the movable platen 16 , and the ball screw 32 is inserted through the ball screw nut 33 . In the schematic plan view of FIG. 1, the first mold opening/closing mechanism 30 is omitted and only one unit is shown, but the number is not limited and usually two or four units are provided.

Next, the second mold opening/closing mechanism 42 for moving the intermediate member 18 (including the intermediate plate 25) and the intermediate molds 21 and 22 to open and close the molds will be described. The second mold opening/closing mechanism 42 is provided between the movable platen 16 and the intermediate member 18 . Brackets are fixed to positions near the four corners of the movable platen 16, and servo motors 43 are fixed to the brackets. The drive shaft of the servomotor 43 and the ball screw 44 are connected directly or via a belt to transmit the driving force.

A ball screw nut 45 is fixed to brackets provided on both sides of the intermediate member 18 , and the ball screw 44 is inserted through the ball screw nut 45 . The second mold opening/closing mechanism 42 can hold the position of the intermediate platen 25 fixedly with respect to the movable platen 16 by servo-locking the servomotor 43 . In the schematic diagrams such as FIG. 1, the second mold opening/closing mechanism 42 is omitted and only one unit is shown, but the number is not limited, and at least two or more, more preferably two on each side, a total of four. is arranged. Furthermore, at least one of the first mold opening/closing mechanism 30 and the second mold opening/closing mechanism 42 may use a hydraulic cylinder.

With the above configuration, a mold consisting of either one of the fixed mold 19 and the intermediate mold 21 or 22 for performing the first molding, and the movable mold 15 and the intermediate mold 21 or 22 for performing the second molding. The mold consisting of the other is arranged coaxially with the mold opening/closing direction C, and after the mold is closed by the first mold opening/closing mechanism 30 and the second mold opening/closing mechanism 42, the mold is simultaneously moved by the mold clamping cylinder 23. Mold clamping is possible. Therefore, either the fixed mold 19, the intermediate mold 21 or 22, or the movable mold can be clamped with approximately the same mold clamping force as a general injection molding machine having one fixed mold and one movable mold. Both the mold 15 and either one of the intermediate molds 21 or 22 can be clamped.

Next, a take-out machine for composite molded products will be described. In this embodiment, as shown in FIG. 1, the take-out machine uses an articulated take-out robot 52 having a take-out head portion 53 at the tip of an arm. Therefore, by switching the control of one articulated take-out robot 52, the take-out position of the composite molded product P in both take-out modes of a normal first take-out mode A and a second take-out mode B of the present embodiment, which will be described later. can be retrieved in response to As for the safety cover of the injection molding machine 11, it is desirable to install it outside the articulated take-out robot 52 so as to include the articulated take-out robot 52 as well. Although the articulated take-out robot 52 is installed on the front side or the back side of the injection molding machine 11 in FIG. 2, the illustration is omitted.

Next, a method of controlling the injection molding machine 11 for composite molding will be described with reference to FIGS. 1 to 3. FIG. First, the normal first take-out mode A will be explained. In the first take-out mode A, when the fixed mold 19, the intermediate mold 21, and the intermediate mold 22 and the movable mold 15 holding the primary molded product P1 are closed, the half nut 29 engages the tie bar 24. It is engaged with the stop portion 24a. After that, the positioning pins 38 of the first positioning mechanism 35 inserted into the positioning holes 40 of the intermediate plate 25 are pulled out, and the fixing of the intermediate plate 25 is released. Next, the fixed mold 19 and the intermediate mold 21, and the intermediate mold 22 and the movable mold 15 are simultaneously clamped by the mold clamping cylinder 23 of the mold clamping mechanism. Molten resin is injected from the first injection device 13 into the cavity formed between the fixed mold 19 and the intermediate mold 21 while the mold is clamped by the mold clamping cylinder 23 . Another molten resin is injected from the second injection device 14 into the cavity formed between the intermediate mold 22 and the movable mold 15, and combined with the primary molded product P1 to form a composite molded product P2 (finished product). is molded.

Next, the positioning pins 38 of the first positioning mechanism 35 are reinserted into the positioning holes 40 of the intermediate platen 25, and the intermediate platen 25, the intermediate molds 21 and 22, and the movable mold 15 and the movable platen 16 reach the mold opening completion position again. The mold is opened. At this time, the composite molded product P2 is held by the intermediate mold 22 provided with the ejector mechanism 50 and opened. Then, the ejector mechanism 50 of the intermediate mold 22 is operated while the intermediate mold 22 and the movable mold 15 face each other. At the same time, a take-out machine such as an articulated take-out robot 52 is inserted between the movable mold 15 and the intermediate mold 22, holds the composite molded product P2 ejected by the ejector pins 51 of the ejector mechanism 50, and moves the injection molding machine 11. Take it outside. Next, after the positioning pin 38 of the first positioning mechanism 35 is extracted from the positioning hole 40 of the intermediate plate 25, the intermediate plate 25 and the intermediate molds 21, 22 are continuously rotated 180° at a time. As a result, the intermediate mold 22 from which the composite molded product P2 has been taken out faces the fixed mold 19. As shown in FIG. The intermediate mold 21 holding the primary molded product P1 faces the movable mold 15. As shown in FIG.

As a modification of the first ejection mode, after the composite molded product P2 is held by the intermediate mold 22 and opened, the ejector mechanism 50 is not operated immediately, and the intermediate molds 21 and 22 are moved 180 degrees. ° Rotate. Then, the ejector mechanism 50 of the intermediate mold 22 is operated while the intermediate mold 22 holding the composite molded product P2 faces the fixed mold 19, and the composite molded product P2 is taken out. In many cases, the first take-out mode A has a shorter molding cycle time than the second take-out mode B, which will be described below. Used for molded products.

Next, the second take-out mode B of this embodiment will be described. In the second extraction mode B, when the stationary mold 19, the intermediate mold 21, and the intermediate mold 22 and the movable mold 15 holding the primary molded product P1 are closed, the half nut 29 engages the tie bar 24. It is engaged with the stop portion 24a. After that, the positioning pins 38 of the first positioning mechanism 35 inserted into the positioning holes 40 of the intermediate plate 25 are pulled out, and the fixing of the intermediate plate 25 is released. Next, the fixed mold 19 and the intermediate mold 21, and the intermediate mold 22 and the movable mold 15 are simultaneously clamped by the mold clamping cylinder 23 of the mold clamping mechanism. Molten resin is injected from the first injection device 13 into the cavity formed between the fixed mold 19 and the intermediate mold 21 while the mold is clamped by the mold clamping cylinder 23 . Another molten resin is injected from the second injection device 14 into the cavity formed between the intermediate mold 22 and the movable mold 15, and combined with the primary molded product P1 to form a composite molded product P2. . Next, the positioning pins 38 of the first positioning mechanism 35 are reinserted into the positioning holes 40 of the intermediate platen 25, and as shown in FIG. 16 is again opened to the mold opening completion position.

However, the mold opening amounts of the intermediate platen 25 and the movable platen 16 are different between the first take-out mode A and the second take-out mode B. FIG. That is, in the second take-out mode B, the ejector mechanism 50 is operated at a position where the intermediate mold 22 does not face the movable mold 15 to take out the molded product. Therefore, no space is required between the intermediate mold 22 and the movable mold 15 for extracting the composite molded article P2 from the mold or for inserting a take-out machine.

In the second extraction mode B, the servomotor 34 is then operated to rotate the intermediate plate 25 and the intermediate molds 21 and 22 by 90°. At this time, FIG. 1 shows the rotation trajectory R of the corners of the composite molded product P2 held by the intermediate mold 22, but when the intermediate plate 25 rotates, the composite molded product P2 comes into contact with the movable mold 15. don't do it. Then, as shown in FIG. 2, the mold mounting surfaces 25a and 25b of the intermediate plate 25 are parallel to the mold opening/closing direction C (the mold mounting surfaces 25a and 25b of the intermediate plate 25 are positioned on the operation side and the counter-operation side). facing), the rotation of the intermediate plate 25 is stopped. At this time, rotation stop control of the intermediate plate 25 is performed by position control by detecting the rotation angle by a rotary encoder (not shown) of the servomotor 34 . Then, the hydraulic cylinder 49 of the driving means of the second positioning mechanism 36 provided on the lower frame 27 is operated with respect to the intermediate plate 25 whose rotation has stopped, and the intermediate plate 25 is positioned in the positioning hole 40 provided in the bracket 46 of the intermediate plate 25 . A pin 47 is inserted.

Next, the ejector mechanism 50 of the intermediate mold 22 is actuated while the intermediate mold 22 is rotated by 90 degrees to face the side of the injection molding machine 11 . At the same time, a take-out head portion 53 of a take-out machine such as an articulated take-out robot 52 is inserted forward of the cavity surface 22a of the intermediate mold 22 from between the upper and lower tie bars 24,24. The take-out head portion 53 of the articulated take-out robot 52 holds the composite molded product P2 ejected by the ejector pin 51 and takes it out of the injection molding machine 11 . Next, the intermediate platen 25 and the intermediate die 22 are again rotated by 90°. As a result, the intermediate mold 22 from which the composite molded product P2 has been taken out faces the fixed mold 19. As shown in FIG. The intermediate mold 21 holding the primary molded product P1 faces the movable mold 15. As shown in FIG.

In the above example, the intermediate plate 25 and the intermediate molds 21 and 22 are rotated 90° toward the operation side, but are rotated 90° toward the non-operation side, and the ejector mechanism 50 operates (ejector extraction operation). It may be something that is done. In the above example, the intermediate die 22 rotated by 90° is positioned and fixed by the second positioning mechanism 36. However, the second positioning mechanism 36 is not provided and the servomotor 34 is used to perform servo locking. , the ejector mechanism 50 may be operated to take out the ejector.

Further, according to the present invention, if the ejector mechanism 50 is operated at a position where the intermediate mold 22 does not face the first mold and the second mold, the rotation angle from the stop position to the start of rotation is The rotation angle is not limited to 90° (including the plus side and the minus side), and as an example, the intermediate plate 25 may be stopped at another rotation angle such as 45° or 135°. Considering that it is easy for the unloader to enter from the side without interfering with the movable mold 15 or the fixed mold 19, from the angle at the start of rotation facing the fixed mold 19 or the movable mold 15 It is desirable to rotate the intermediate plate 25 and the intermediate molds 21 and 22 within the range of 45° to 135° to stop them. Further, the operation of the ejector mechanism 50 does not exclude the operation of the intermediate plate 25 while it is rotating.

Next, another embodiment will be described. Although illustration is omitted for another embodiment, the central intermediate member and the intermediate plate are fixedly provided in the mold opening/closing direction and do not move, or only move slightly when the molds are clamped. Intermediate molds are attached to both sides of an intermediate plate that is rotatable with respect to the intermediate member. On one side of the intermediate member and the intermediate platen, a movable platen, which is the first platen, to which the movable mold, which is the first mold, is attached is movable to open and close the mold with respect to the intermediate platen. On the other side of the intermediate member and the intermediate platen, a movable platen, which is a second platen, to which a movable mold, which is a second mold, is attached is movable to open and close the mold with respect to the intermediate platen. In addition, the first mold, which is the movable mold, the intermediate mold, and the second mold, which is the movable mold, can be simultaneously clamped by a mold clamping mechanism provided on the movable platen or on the back surface thereof. .

The injection molding machine of another embodiment also has a first take-out mode A and a second take-out mode B for taking out the molded product. In the case of the second extraction mode B, with the movable mold opened, the intermediate plate and the intermediate mold are rotated by 90°, and the intermediate mold is oriented sideways in the direction orthogonal to the mold opening/closing direction. In this state, the composite molded product is taken out by an ejector mechanism provided on the intermediate platen or the intermediate mold. In addition, the present invention is provided with a cubic intermediate mold having four cavity surfaces without an intermediate plate. It is not intended to take out molded products from.

In both this embodiment and other embodiments, the intermediate mold may be a core mold or a cavity mold. This is advantageous because the mold opening amount of the intermediate mold can be reduced. A deep molded product is, but is not limited to, the length of the width from end to end of the molded product held in the intermediate mold (the length in the direction perpendicular to the opening and closing direction of the mold) ) to 0.4 to 4.0. Even if the molded product is not a deep molded product, the thickness of the mold itself is thick and even if the mold is opened to the same amount as the daylight of the injection molding machine 11 (the state where the movable platen is opened to the maximum), the molded product It is also useful when the tape cannot be removed or is difficult to remove. Furthermore, when you want to insert other equipment such as an insert machine, a mold cavity surface preheater, a mold cavity surface cleaner, a camera for photographing the mold cavity surface, etc. between the molds when taking out the molded product. The present invention is also useful.

Although the present invention is not enumerated one by one, it is not limited to the above. It goes without saying that it applies.

11 Injection molding machine for composite molded product 12 Mold clamping device 15 Movable mold 16 Movable platen 18 Intermediate member 19 Fixed mold 20 Fixed platens 21, 22 Intermediate mold 25 Intermediate platen 25a, 25b Mold mounting surface 28 Rotating shaft 35 First positioning mechanism 36 Second positioning mechanism 50 Ejector mechanism 51 Ejector pin 52 Articulated take-out robot A First take-out mode B Second take-out mode

Claims (4)

Between the first plate on which the first mold is attached and the second plate on which the second mold is attached, it is rotatable around an axis orthogonal to the mold opening and closing direction, and the mold mounting on both sides In an injection molding machine in which an intermediate plate is provided on a surface to which an intermediate mold is attached, and clamping of the first mold and the intermediate mold and the second mold and the intermediate mold are performed simultaneously,
The intermediate mold or the intermediate plate is provided with an ejector mechanism,
An injection molding machine comprising a take-out mode in which the ejector mechanism is operated at a position where the intermediate mold does not face the first mold and the second mold to take out the molded product. a first ejection mode in which the ejector mechanism is operated at a position where the intermediate mold faces the first mold and the second mold to eject the molded product;
2. The injection according to claim 1, further comprising a second ejection mode in which the ejector mechanism is operated at a position where the intermediate mold does not face the first mold and the second mold to eject the molded product. Molding machine. Between the first plate on which the first mold is attached and the second plate on which the second mold is attached, it is rotatable around an axis orthogonal to the mold opening and closing direction, and the mold mounting on both sides A control method for an injection molding machine in which an intermediate plate is provided on each surface to which an intermediate mold is attached, and clamping of the first mold and the intermediate mold and between the second mold and the intermediate mold are performed simultaneously,
The intermediate mold or the intermediate plate is provided with an ejector mechanism,
stopping rotation of the intermediate plate at a position where the intermediate mold does not face the first mold and the second mold;
A control method for an injection molding machine, wherein the ejector mechanism is operated to eject a molded product. 4. The control method for an injection molding machine according to claim 3, wherein the rotation of the intermediate plate is stopped in a state in which the mold mounting surface of the intermediate plate is parallel to the mold opening/closing direction.

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