JP5127880B2 - Injection molding machine and molding method thereof - Google Patents

Description

According to the present invention, the first plate on which the first mold can be attached and the second plate on which the second die can be attached are rotated around an axis perpendicular to the mold opening / closing direction. The present invention relates to an injection molding machine provided with a turntable to which an intermediate mold can be attached and a molding method thereof.

The intermediate mold is rotated about an axis perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. As an injection molding machine provided with an attachable turntable, those described in Patent Documents 1 to 3 are known. Among them, in Patent Document 1 and Patent Document 2, a rotating plate and a movable plate in which a fixed plate and an intermediate mold are rotatably provided are arranged in order, and the rotary plate and the movable plate are provided to be movable in the mold opening / closing direction. In Patent Document 3, a fixed plate having an intermediate mold rotatably provided at the center is arranged, and a movable plate movable in the mold opening / closing direction is arranged on both sides thereof. Further, in Patent Document 2, the arrangement of the injection devices is different, and one injection device is attached in a direction orthogonal to the mold opening / closing direction.

In an injection molding machine such as the above-mentioned Patent Document 1 to Patent Document 3, one of a plurality of intermediate molds is used for primary molding in a cavity formed by combining with a first mold. The molten resin is injected. Then, one of the intermediate molds to which the primary molded product is stuck is rotated, and this time, one of the intermediate molds and the second mold are injected with molten resin for secondary molding. Molding of the molded product is performed. At that time, one intermediate mold and the other intermediate mold are alternately combined with the first mold and the second mold, and primary molding and secondary molding are repeated. Therefore, one intermediate mold and the other intermediate mold each have the same cavity shape. Also, since it is necessary to rotate the intermediate mold while the primary molded product is stuck to one of the intermediate molds, the mold on the intermediate mold side is released from the mold used for the primary molding. The structure is difficult to do. Therefore, as shown in Patent Document 1, it is common to provide an ejector device that projects a molded product on the rotating disk and the intermediate mold side. However, when an ejector device is provided on the turntable and intermediate mold side, it is necessary to provide an ejector device for each intermediate die, and the thickness of the combined portion of the turntable and the intermediate die increases, resulting in a constant mold opening. In order to secure the amount, it is necessary to increase the distance between the two sides of the platen between the rotary plate and the intermediate plate when the mold is opened. Therefore, there has been a problem that the total length of the mold clamping device of the injection molding machine for composite molding becomes long. In addition, when installing the ejector device on the turntable, it is necessary to install piping and wiring to the actuator of the ejector device together with the cooling medium piping to the intermediate mold, and install such piping on the turntable. Had the problem of complicated structure. Furthermore, there is a problem that an ejector mark remains on the surface formed by the intermediate mold in the composite molded product.

In addition, as shown in Patent Document 2, at least one of the injection devices is provided in a direction perpendicular to the mold opening / closing direction, and when the injection device or the like is not disposed on the back side of the movable plate, An ejector device is provided to project a composite molded product that is secondarily molded on the movable mold side. However, the injection molding machine for the composite molded article of Patent Document 2 is provided with an injection device in a right angle direction, so there are many disadvantages from the layout of the factory, and the thickness of the mold to be mounted is changed. Accordingly, since it is necessary to move the injection device on the secondary molding side laterally, there is a problem that a moving mechanism is required and fine adjustment of the nozzle touch position is required every time the mold is replaced.

Japanese Patent Publication No. 4-24213 (left column of page 2, Fig. 1) Japanese Patent Publication No. 3-38095 (right column on page 6, FIG. 1) JP-A-6-254906 (Claim 1, FIG. 1)

  However, even if such an injection molding machine for a composite molded product is installed, there is a case where the composite molded product is temporarily not produced. In such a case, a general molding die is attached to an injection molding machine for a composite molded product to form a general monochromatic molded product (or a molded product that can be molded at the time of one mold clamping). You may want to use it. However, in the case of a general molding die, there is often an ejector protruding pin on the movable die side. Therefore, the present invention rotates around an axis in a direction perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In particular, the present invention relates to an injection molding machine provided with a turntable to which an intermediate mold can be attached and a molding method thereof, and in particular, in a case where a projecting device is provided on at least one of a first board and a second board. It is an object of the present invention to provide an injection molding machine that can also mold a molded product and a molding method thereof.

According to a first aspect of the present invention, there is provided an injection molding machine comprising: a mold opening / closing direction between a first board on which a first mold can be attached and a second board on which a second mold can be attached. In an injection molding machine provided with a turntable on which an intermediate mold can be attached and rotated about an axis in an orthogonal direction, a projecting device is provided on at least one of the first plate and the second plate, The rotating disk is provided with a hole through which a rod operated by a protruding device is inserted.

According to a second aspect of the present invention, there is provided a molding method for an injection molding machine between a first plate on which a first mold can be attached and a second plate on which a second mold can be attached. In an injection molding machine provided with a turntable on which an intermediate mold can be attached and rotated about an axis perpendicular to the opening / closing direction, at least one of the first plate and the second plate is provided with a protruding device. In addition, the molding device is protruded between the rotating plate and the second plate by the protruding device of the first plate, or between the rotating plate and the first plate by the protruding device of the second plate. The molding die is protruded.

According to a third aspect of the present invention, there is provided a molding method for an injection molding machine according to the second aspect, wherein the rotary plate is provided with a hole through which a rod operated by a protruding device is inserted, and the first plate and the rotary plate. A block having a predetermined thickness provided with a hole through which the rod of the protruding device is inserted is attached between one of the second plate and the rotating plate, and the hole of the block and the Protruding through a rod inserted into the hole of the turntable, or protruding through a rod inserted into the hole of the block and the hole of the turntable by the protrusion device of the second board To do.

In the injection molding machine of the present invention, an axis in a direction perpendicular to the mold opening / closing direction is provided between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In an injection molding machine provided with a turntable to which an intermediate mold can be attached that is rotated at the center, at least one of the first plate and the second plate is provided with a protrusion device, and the turntable protrudes. Since the hole through which the rod operated by the apparatus is inserted is provided, the molded product can be molded using a general molding die in addition to the molding of the composite molded product.

It is a partial cross section figure at the time of mold opening of the injection molding machine for composite molded products of this embodiment. It is a partial cross section figure which shows the state which rotated the rotary disk and the intermediate metal mold | die from the state of FIG. 1 about the injection molding machine for composite molded products of this embodiment. FIG. 3 is a partial cross-sectional view showing a state where the injection molding machine for a composite molded product of the present embodiment is closed from the state of FIG. 2 and injection is performed from the first injection device and the second injection device. FIG. In the injection molding machine of the present embodiment, when a general molding die is attached between the rotating disc and the first disc, a monochromatic molded product is molded, and the molded product is projected from the intermediate mold. FIG. In the injection molding machine of this embodiment, it is a partial sectional view when a general molding die is attached between the rotating disk and the first disk and the mold is closed.

An injection molding machine 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 for molding a composite molded product. The injection molding machine 11 is an injection molding machine having a function of molding a composite molded product from a plurality of resin materials, and is a mold injection device 12 and a first injection device provided on both sides thereof in the same direction as the mold opening / closing direction. 13 and the second injection device 14 constitute a basic part. In the mold clamping device 12 of the injection molding machine 11, a fixed platen 16 is disposed in a fixed or moment-free state with respect to the base 15 at the center. A rotating shaft 17 and a rotating plate 18 are rotatably supported around an axis A in a direction orthogonal to the mold opening / closing direction on the fixed plate 16, and are rotatably provided by a servo motor 19. The intermediate mold 20 having the same cavity forming surface 33 is attached to the attachment surfaces on both sides of the turntable 18. Although a temperature control water channel is provided in the intermediate mold 20 and the turntable 18, it is omitted in the schematic view of FIG. In the present invention, the intermediate mold 20 is not provided with an ejector which is a protruding device for the composite molded product P. Accordingly, the thickness of the intermediate mold 20 can be reduced, and piping to the ejector is not necessary. Therefore, the structure of the rotary disk 18 and its pivot support mechanism can be simplified, and the intermediate mold 20 is molded. Ejector marks are not formed on the part.

The turntable 18 is provided with a hole 52 through which a rod 51 actuated by an ejector 30 or an ejector 31 which is a protruding device described later is inserted. Specifically, a hole 52 is formed in a direction perpendicular to the surface of the turntable 18 and in a direction that becomes the mold opening / closing direction when the turntable 18 is clamped. The position where the hole 52 is provided is on an extension line in the axial direction of the rods 43 and 44 of the ejector 30 or 31. The hole 52 is unnecessary when the composite molded product P is formed, and the hole 52 may be covered with a stopper.

On both sides of the fixed plate 16 and the rotary plate 18, a first movable plate 22 as a first plate to which a first movable die 21 as a first die is attached, and a second die. A second movable plate 24 as a second plate to which the second movable mold 23 is attached is slidably provided on the base 15. A first mold opening / closing mechanism 25 having a servo motor and a ball screw is attached between the intermediate fixed plate 16 and the first movable plate 22, and between the intermediate fixed plate 16 and the second movable plate 24. Is attached with a second mold opening / closing mechanism 26. Accordingly, the first movable mold 21 attached to the first movable platen 22 and the second movable mold 23 attached to the second movable platen 24 are intermediate molds attached to the rotary plate 18 provided therebetween. 20, 20 can be moved in the mold opening and closing direction. As shown in FIG. 3, the first movable mold 21 and the intermediate mold 20, and the second movable mold 23 and the intermediate mold 20 are closed, and the first cavity C1 and the second mold 20 are respectively closed. A cavity C2 is formed.

Mold clamping cylinders 27 are provided in the vicinity of the four corners of the first movable platen 22, and the ram of the mold clamping cylinder 27 also serves as a tie bar 28. The mold clamping cylinder 27 is a bi-directionally operated cylinder. A large-area mold clamping oil chamber is provided on the tie bar 28 side in the first movable platen 22 and the anti-intermediate mold side (first injection) is provided. The device side) is provided with a powerful open oil chamber with a small area. The mold clamping cylinder 27 is provided with an adjusting means (not shown) for correcting the position of the tie bar 28 changed by mold clamping and strong mold opening every cycle. Each mold clamping cylinder 27 is desirably controlled individually by a servo valve (not shown) or the like. The tie bar 28 is slidably inserted in the vicinity of the four corners of the intermediate fixed platen 16 and is also inserted in the vicinity of the four corners of the second movable platen 24. A half nut 29 for locking a groove-shaped locking portion formed on the tie bar 28 is disposed around the portion of the second movable platen 24 on the side opposite to the intermediate mold where the tie bar 28 is inserted. Yes. There are various variations of the arrangement of the clamping cylinder and the like.

In the present embodiment, the first movable plate 22 and the second movable plate 24 on both sides of the mold clamping device 12 are respectively provided with ejectors 30 and 31 that are protruding devices. The first movable platen 22 will be described first. The first injection device 13 is arranged at the center of the surface of the first movable platen 22 on the anti-intermediate mold side in the same direction as the mold opening / closing direction. A mortar-shaped recess 32 into which the nozzle is inserted is formed. A through hole is formed in the center of the recess 32 toward the mold mounting surface. Further, a hydraulic cylinder 34, which is a driving means of the ejector 30, is attached to a portion of the recess 32 that does not interfere with the insertion of the first injection device 13, and the rod 43 protrudes from the first movable mold 21 side. When performing the above, the rear surface of the ejector plate is brought into contact. The rods 43 are preferably connected by a connecting plate (not shown) to project simultaneously. Further, the ejector 30 is preferably provided at a position where the heat released from the first injection device 13 does not affect the actuator such as the hydraulic cylinder 34 and the molten resin dripping from the nozzle tip is not applied. Therefore, the ejector 30 is provided at a certain interval at a position that is the side (horizontal side) when the first injection device 13 nozzle-touches the first movable mold 21.

Similarly, an ejector 31 as a protruding device is provided in the recess 38 for the movable plate 24 as the second plate. And in this embodiment, the ejector 31 by the side of the 2nd movable board 24 is operated, and the composite molded product P is taken out. Accordingly, the rod 44 of the hydraulic cylinder 39 is brought into contact with the back surface of the ejector plate 40 of the second movable mold 23 so that the ejector pin 41 is projected and retracted from the cavity forming surface 42. In this embodiment, the ejectors 30 and 31 are each provided with two hydraulic cylinders 34 and 39 as drive means, but the number is not limited, and an electric motor and a ball screw mechanism may be used. The ejector may be disposed only in the mold.

As for the injection device, the first injection device 13 is attached to the outside of the first movable platen 22. In the present embodiment, the first injection device 13 is for injecting the first resin of the composite molded product, and is arranged with the longitudinal direction facing in the same direction as the mold opening / closing direction. The first injection device 13 is moved along with the mold opening / closing movement of the first movable platen 22 and can move forward and backward with respect to the first movable platen 22. A second injection device 14 is attached outside the second movable platen 24. In the present embodiment, the second injection device 14 is for injecting the second resin of the composite molded product, and is arranged with the longitudinal direction facing the same direction as the mold opening / closing direction. The second injection device 14 is moved along with the mold opening / closing movement of the second movable platen 24 and can be moved forward and backward with respect to the second movable platen 24.

Then, the nozzle of the first injection device 13 is brought into contact with the first movable mold 21 through the through hole of the first movable platen 22 and is cavityd through a resin passage (cold runner or hot runner) (not shown). Molten resin is injected into C1. Similarly, for the second movable mold 23 and the second movable platen 24, the molten resin is injected into the cavity C2 through the resin passage. In general, the nozzle of the first injection device 13 is connected to the first movable mold 21, and the nozzle of the second injection device 14 is connected to the second movable mold 23. In many cases, gates are provided on the cavity forming surfaces 37 and 42 of the movable mold 21 and the second movable mold 23. Further, in the schematic view of FIG. 1 and the like, the temperature control water channels provided in the movable molds 21 and 23 are omitted.

Next, a molding method of the composite molded product P by the injection molding machine 11 will be described with reference to FIGS. In the mold clamping device 12 shown in FIG. 1, the first mold opening / closing device 25 and the second mold opening / closing device 26 are operated, so that the fixed plate 16, the rotating plate 18, and the intermediate molds 20, 20 are A state in which the first movable plate 22 to which one movable mold 21 is attached and the second movable plate 24 to which the second movable die 23 is attached are each opened and moved to a mold opening completion position. Is shown. Then, the hydraulic cylinder 39 of the ejector 31 is operated, and the ejector pin 41 protrudes from the cavity forming surface 42 of the second movable mold 23, whereby the composite molded product P that has been molded is protruded. Not taken out by take-out device. When the composite molded product P protrudes, an ejector mark often remains on the molding surface P3 of the composite molded product P on the second movable mold 23 side. However, since the gate trace is often formed on the molding surface P3 side of the composite molded product P as described above, the gate trace and the ejector trace can be formed on the same molding surface. Therefore, by setting the molding surface P3 of the composite molded product P as the back surface of the molded product, the gate trace and the ejector trace can be collected on the back surface.

Further, the primary molded product P1 molded in the first cavity C1 formed between the first movable mold 21 and the intermediate mold 20 when the mold is opened is the cavity forming surface 33 of the intermediate mold 20. It is taken out in a state of sticking to. In addition, when the mold opening with the primary molded product stuck to the intermediate mold 20 is restricted by the cavity shape or the like, the ejector 30 may assist the mold release from the cavity forming surface 37. That is, when the first movable mold 21 is opened with respect to the intermediate mold 20 or immediately before, the primary molded product P1 is exerted by applying a force in the direction in which the ejector 30 is advanced at a speed close to the mold opening speed. Can be attached to the intermediate mold 20 and released easily.

When the removal of the composite molded product P and the release of the primary molded product P1 are finished, as shown in FIG. 2, the servo motor 19 for rotating the rotating disk at the upper part of the fixed disk 16 is driven, The intermediate mold 20 in which the primary molded product remains and the intermediate mold 20 in which the composite molded product P does not remain are rotated (reversed) by 180 ° about the axis A orthogonal to the mold opening / closing direction. The primary molded product P1 is moved to a position corresponding to the cavity forming surface 42 of the second movable mold 23. When the rotation is completed, the fixed platen 16 and the rotary platen 18 are temporarily fixed by pins not shown. The intermediate molds 20 and 20 may be rotated only in one direction or reversed.

Then, as shown in FIG. 3, when the turntable 18 and the intermediate mold 20 are completely rotated, the first mold opening / closing mechanism 25 and the second mold opening / closing mechanism 26 are operated, and the intermediate mold 20 and the first mold opening / closing mechanism 26 are operated again. The movable mold 21 is brought into contact with the corresponding mold, and the intermediate mold 20 and the second movable mold 23 are brought into contact with each other. From this state, the half nut 29 is locked to the locking portion of the tie bar 28, and the mold clamping cylinder 27 is operated to perform mold clamping. After confirming the completion of mold clamping, the first injection device 13 injects from the first injection device 13 into the primary cavity C1 formed between the first movable mold 21 and the intermediate mold 20 to perform primary molding. The product P1 is molded. In the present embodiment, the primary molded product P1 is molded by injection compression molding.

Next, primary molding is performed on the secondary cavity C2 formed between the second movable mold 23 and the intermediate mold 20 (part of the wall of the secondary cavity C2 is formed by the primary molded product P1). In another timing, injection is performed from the second injection device 14 to form the secondary molded portion P2. In the present embodiment, the secondary molding in which the resin of the secondary molded portion P2 is attached around the primary molded product P1 is performed by general injection molding. When the cooling time is over, the mold shifts to mold opening and returns to the state shown in FIG.

In the molding method of the injection molding machine 11 of the present embodiment, the composite molded product P is projected using the projection device (ejector 31) of the second movable platen 24 having the recess 38 into which the nozzle used in the secondary molding is inserted. Is done. For example, when the specifications such as the injection amount of the first injection device 13 and the second injection device 14 are different, and when another composite molded product P is formed by exchanging the mold, the second injection device 14 The first movable mold 21 in which primary molding is performed on the second cavity C2 side between the second movable mold 23 and the intermediate mold 20 where injection is performed, and injection is performed from the first injection device 13 is performed. There is a case where it is desired to perform secondary molding on the side of the first cavity C1 between the intermediate mold 20 and the intermediate mold 20. Even in such a case, since the ejectors 30 and 31 are provided on both movable plates 22 and 24 (or movable molds), the degree of freedom in molding can be increased.

Next, a general molding die 53 is attached to the injection molding machine 11 of the present invention, and a general single-color molded product (or a molded product that can be molded only by one mold clamping or melted from one injection device) The case of molding a molded product) in which resin is injected to complete molding will be described. A general molding die 53 includes a fixed die (cavity die) 54 and a movable die (core die) 55. A sprue bush (sometimes a hot runner) is provided on the fixed die 54 side. Is provided. In addition, the mold P <b> 4 is released with the molded product P <b> 4 attached to the movable mold 55, and an ejector protruding mechanism is disposed on the movable mold 55. The projecting mechanism in the mold includes a known ejector plate 56, a spring for moving the ejector pin 57 fixed to the ejector plate 56, the ejector plate 56, and the like.

In this embodiment, the fixed mold 54 is attached to the first movable platen 22 on the side where the first injection device 13 is located, and the movable die 55 is attached to the rotary platen 18. A dummy mold 58 is attached between the rotary plate 18 and the second movable plate 24 on the side where the ejector 31 is used. The dummy mold 58 is a block having a predetermined thickness in a rectangular parallelepiped shape in which the contact surface 58a on the rotating disk side and the contact surface 58b on the second movable panel side are parallel to each other. Further, the dummy mold 58 is formed so as to penetrate the hole 59 into which the rod 44 is inserted in the mold opening / closing direction so that the dummy mold 58 is positioned at the same position as the hole 52 of the rotating disk 18 when mounted on the panel. Yes. The dummy mold 58 is usually not provided with piping for a cooling mechanism. The dummy mold is not limited to a solid one, and may be one having a partially hollow interior or formed from a pipe or the like. The reason why the dummy mold 58 is attached between the rotary plate 18 and the second movable plate 24 is that the second movable plate 24 moved on the guide cannot advance more than a certain amount, and the engagement position of the half nut This also corresponds to the stop position of the second movable platen 24. However, if it is designed from the beginning to give priority to molding with a general molding die 53 only between one of the panels 22 and the rotary disk 18, the rotary disk 18 and the second movable panel 24 are in direct contact with each other. Since it is not impossible to fix the two boards side by side without using the dummy mold 58, the dummy mold 58 is not essential.

Another rod 51 is coaxially connected to all the rods 44 of the ejector 31 of the second movable platen 24. The rod 44 and the rod 51 are connected by a known method such as screwing a screw portion of the other rod 51 or the like into a screw hole of the one rod 44 or the like. In addition to the thickness of the dummy mold 58 and the rotating disk 18, the rod 51 has a length until it comes into contact with the back surface of the ejector plate 56 of the movable mold 55 (in this molding, it does not move when the mold is opened and closed). It is a cylindrical member having a diameter that can be inserted into the dummy mold 58 and the hole 52 of the turntable 18. Accordingly, the protruding mechanism of the movable mold 55 is actuated by the ejector 31 of the second movable platen 24.

Then, the first mold opening / closing device 25 of the injection molding machine 11 is operated to move the first movable platen 22 and the fixed mold 54 (in this molding, the fixed mold 54 is moved) in the mold closing direction, After the fixed mold 54 and the movable mold 55 are brought into contact with each other, the mold is clamped, and the first injection device 13 performs injection into the cavity C3. Then, after the first movable platen 22 and the fixed mold 54 are opened again, the hydraulic cylinder 39 of the ejector 31 is operated, and the ejector protruding mechanism of the movable mold 55 is operated via the rods 44 and 51 to be movable. The molded product P4 attached to the mold 55 is protruded. Note that the rod 51 may be directly projected and retracted from the cavity surface of the movable mold 55 without providing the ejector plate 56 or the like in the movable mold 55.

  In the present invention, the rotating plate 18 and the second plate are connected to each other through the rod 51 inserted into the hole 52 of the rotating plate 18 by the protruding device provided on the first movable plate 22 which is the first plate. The molded product P4 attached to the movable mold 55 (not moved when the mold is opened / closed) of the general molding mold 53 attached between the second movable plates 24 is removed. Good. In that case, a dummy mold 58 is attached between the first movable mold 22, which is the first board, and the rotating board 18.

Further, the present invention will be described because it can be similarly applied to an injection molding machine for composite molded products of another embodiment. An injection molding machine for composite molding according to another embodiment is a type similar to Patent Document 2, and includes a fixed platen that is a first plate to which a fixed die that is a first die is attached, and a second platen. An intermediate board is inserted into the tie bar and is movable in the mold opening / closing direction between the movable board as the second board to which the movable mold as the mold is attached. A rotating shaft and a rotating disk that are rotated about an axis orthogonal to the mold opening / closing direction are attached to the intermediate disk, and the intermediate metal molds are respectively attached to the mold mounting surfaces on both sides of the rotating disk. It is attached so as to correspond to the mold and the second mold. The rotating plate is provided with a hole through which a rod operated by a protruding device is inserted.

In an injection molding machine for composite molding according to another embodiment, a first injection device is provided outside the fixed platen in the same direction as the mold opening / closing direction, and at the center of the surface on the anti-intermediate mold side of the fixed platen. A recess into which the nozzle of the injection device is inserted is formed. A second injection device is also provided on the outside of the movable plate in the same direction as the mold opening / closing direction, and a recess for inserting the nozzle of the injection device is formed at the center of the surface of the fixed plate on the side opposite to the intermediate mold. ing. An ejector, which is a protruding device, is disposed in or near the recess of at least one of the fixed plate and the movable plate. It is more desirable to provide the ejector on both the fixed platen and the movable platen.

The intermediate plate (including the rotating plate and the intermediate die), the movable plate (including the movable die), and the second injection device are movable relative to the fixed plate (including the fixed die). . In the case of another embodiment, the first injection device on the fixed platen side does not need to be moved greatly according to the mold opening / closing, so a large injection device can be provided, but the second injection device In some cases, a small injection device is used. In that case, if there are ejectors on both the fixed platen and the movable platen, the part molded with the molten resin injected from the large first injection device on the fixed platen side may be used as the primary molded part. Both are possible, and the degree of freedom of molding increases.

Also in the case of the injection molding machine of another embodiment, a general single-color molded product is mounted by attaching a fixed mold of a general molding die to the fixed platen and attaching a movable mold of the molding die to the movable platen. Molding can be performed. Then, a dummy mold in which a hole through which the same rod as shown in FIG. 4 is inserted is inserted between a rotary disk attached to the intermediate board and a movable board as the second board. Then, a molten resin is injected from the first injection device with a molding die between the fixed platen and the rotary platen, and the rotary platen and the movable die are moved in the mold opening direction, and the movable platen as the second plate is projected. Using the device, remove the molded product attached to the movable mold through the rod.

In addition, about the turntable of the injection molding machine of each said embodiment, it may be attached on the turntable arrange | positioned on the bed, and may be in a free state with respect to an upper tie bar. The number of intermediate molds is not limited to two, and may be an even number such as four or six. For example, when the number of intermediate molds is four, it is necessary for each of the conventional intermediate molds to be provided with an ejector or the like. However, in the present invention, if an ejector or the like is provided on at least one of the panels on both sides, I'm sorry.

  In the above description, the protrusion device provided in the injection molding machine for the composite molded product of each embodiment of the present invention has been described with respect to the example of use in the ejector. However, the other device moves in the mold opening / closing direction to perform the protrusion operation. If so, it is not limited to an ejector. Specifically, the protruding device may be a driving device for protruding a gate cutter that cuts the gate between the cavity and the resin passage. Further, the protruding device may be one used for a driving device for protruding a valve gate that opens and closes the hot runner.

  In this way, the injection molding machine can be used not only for molding a composite molded product, but also for molding a monochromatic molded product with a molding die between one plate or a molding die between both plates. In addition, when the number of production is different between the first molding die and the second molding die, one of the molding dies is always closed by locking the mold opening / closing device or by a hook between the dies. As a state, the molding can be continued only on the other molding die side. In this way, the injection molding machine can be used for molding various molded products with a wide application range.

DESCRIPTION OF SYMBOLS 11 Injection molding machine 12 Clamping apparatus 13 1st injection apparatus 14 2nd injection apparatus 16 Fixed board 18 Rotating board 20 Intermediate mold 21 1st movable mold 23 2nd movable mold 22 1st movable board 24 2nd Movable plate 27 Clamping cylinder 30, 31 Ejector
32, 38 Recess 41, 57 Ejector pin 43, 44, 51 Rod 52, 59 Hole A Shaft perpendicular to mold opening / closing direction P Composite molded product P4 Molded product

Claims (3)

The intermediate mold is rotated about an axis perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In an injection molding machine provided with an attachable turntable,
A projecting device is provided on at least one of the first board and the second board,
An injection molding machine according to claim 1, wherein a hole through which a rod operated by a protruding device is inserted is provided in the rotating disk. The intermediate mold is rotated about an axis perpendicular to the mold opening / closing direction between the first board to which the first mold can be attached and the second board to which the second mold can be attached. In an injection molding machine provided with an attachable turntable,
A projecting device is provided on at least one of the first board and the second board,
The first disk protruding device is used to protrude the molding die between the rotating disk and the second disk;
Alternatively, a molding method for an injection molding machine, wherein a molding die is projected between the rotary disk and the first disk by a second disk protrusion device. The rotating plate is provided with a hole through which a rod operated by a protruding device is inserted,
A block having a predetermined thickness provided with a hole through which the rod of the protruding device is inserted is attached between one of the first disk and the rotating disk, and the second disk and the rotating disk,
Protruding through the rod inserted through the hole of the block and the hole of the rotating disk by the protruding device of the first board,
3. The molding method for an injection molding machine according to claim 2, wherein the projection is performed through a rod inserted into the hole of the block and the hole of the rotating disk by the projecting device of the second disk.