JP6318766B2 - Lamination molding injection molding machine and injection molding method - Google Patents

Description

  The present invention relates to an injection molding machine for laminate molding and an injection molding method including a fixed platen, a movable platen, and an intermediate plate (rotary platen) disposed between the fixed platen and the movable platen.

  Various molding methods for laminated molded products made of various combinations of different materials, the same materials, different colors, and the same color in resin molded products, such as those characterized by injection molding machines or those characterized by molding dies There are known injection molding machines for molding, molds for laminate molding, and laminate molding methods employing these. A fixed mold, a movable mold, and a rotary mold are added to an injection molding machine for laminated molding including a fixed plate, a movable plate, and an intermediate plate (rotary plate) disposed between the fixed plate and the movable plate. One of them is a molding method for attaching and molding a laminated molded product.

  On the other hand, an injection molding machine or a lamination mold used for molding such a laminated molded product is often an injection molding machine or a mold dedicated to the laminated molded product because of its configuration. While there is a demand for injection molding machines and molds dedicated to multi-layer molded products for forming multi-layered small-sized products that have high quality, multi-functionality, etc. In view of the operating efficiency of equipment, a multi-layer injection molding machine capable of normal molding of single-layer molded products using a general-purpose mold attached to a general-purpose injection molding machine has been proposed.

  In Patent Document 1, in the injection molding machine for laminating molding having the rotating disk as described above, when performing the normal molding between the fixed disk and the rotating disk in a state where the movable disk and the rotating disk are fixed, A rod (extrusion pin) actuated by a projection device (product extrusion means) arranged on the rotating plate is passed through the rotating disk, and the protruding device protrudes the molded product held in the mold attached to the rotating disk. An injection molding machine and a molding method for performing (product extrusion operation) are disclosed.

JP 2011-245661 A

  In the injection molding machine of Patent Document 1, the second movable platen 24 and the rotating platen 18 are fixed between the first movable platen 22 and the rotating platen 18 via a dummy mold 58 disposed therebetween. It is possible to perform normal molding. At that time, a product push-out operation is performed in the movable mold 55 attached to the turntable 18 using the ejector 31 (protruding device / product push-out means) arranged on the second movable platen 24 side. It has a configuration.

  Specifically, by connecting the rods 51 to all the rods 44 (extrusion pins) of the ejector 31, the total length of these rods (extrusion pins) is set to the thickness of the dummy die 58 and the thickness of the rotating disc 18. It will be extended by the combined amount. The connected rod 51 passes through the hole 59 of the dummy mold 58 and the hole 52 of the rotating disk 18 and comes into contact with the back surface of the ejector plate 56 (product extrusion plate) of the movable mold 55 (Patent Document 1). (See paragraphs [0026] to [0028] and FIGS. 5 and 6).

  Such an extension (connection) operation of a plurality of rods has a problem that it requires a predetermined operation time and becomes an obstacle to automation in a changeover operation from lamination molding to normal molding. Further, it is necessary to position the dummy mold 58 so that the holes 59 of the dummy mold 58 and the holes 52 of the turntable 18 are arranged concentrically with respect to all the rods 44 of the ejector 31.

  Here, Patent Document 1 states that the dummy mold 58 is not essential (paragraph [0027] of the specification of Patent Document 1). If the rotary plate 18 and the second movable plate 24 can be brought into direct contact without using the dummy mold 58, the amount of rod extension by the rod 51 can be reduced. However, the extension (connection) work itself is not simplified, for example, the number of rods to be extended (connection) work is reduced. Above all, in this embodiment, the turntable 18 and the second that are in a direct contact state. The mold mounting surface of the movable platen 24 may be damaged by repeated mold opening / closing operations and mold clamping operations, which is not realistic.

  The present invention has been made in view of the above-described problems, and specifically includes a stationary platen, a movable platen, and an intermediate plate (rotary plate) disposed between the fixed platen and the movable platen. An injection molding machine and an injection molding method for laminating which can simplify a changeover operation from a lamination molding to a normal molding, or vice versa, when a normal molding is performed between a stationary platen and a rotating disk. The purpose is to provide.

The above object of the present invention is to provide a laminate having a turntable in which at least two rotary molds are mounted, and the mold can be opened / closed and clamped between the rotary mold and a mold attached to at least one of a fixed platen and a movable platen In injection molding machines for molding,
With the turntable and movable plate integrated through a protective block, the mold attached between the fixed plate and the turntable can be opened and closed and clamped.
Corresponding unevenness in the mold opening and closing direction between the rotating part and the rotation support part of the rotating disk, and the protective block is an unevenness that unifies the rotating disk and the movable disk in contact with the rotating part and the rotation support part of the rotating disk. Has a shape,
This is achieved by an injection molding machine for lamination molding configured to pass through the rotating pin of the extrusion pin of the product extrusion means arranged in the protective block.

In the injection molding machine for laminate molding according to the present invention, the extruding pin of the product extruding means is divided in the longitudinal direction, the penetrating part of the extruding pin to the rotating disk is divided, and the divided penetrating part is rotated. You may insert in the through- hole of a board.

  On the other hand, in the injection molding machine for laminate molding according to the present invention, the product pushing means may be operated by another product pushing means arranged on the movable platen.

Further, the above object of the present invention is to adopt such an injection molding machine for laminated molding according to the present invention, and in a state in which the rotating disk and the movable disk are integrated via the protective block, the fixed disk and the rotating disk. Combine molds attached in between to form a mold cavity,
It is achieved by an injection molding method in which the extrusion pin of the product extruding means arranged in the protection block is passed through the turntable, and the product extruding operation of the molded product held on the mold attached to the fixed plate side of the turntable is performed. The

The injection molding machine for laminated molding according to the present invention is equipped with at least two rotary molds, and can open / close and clamp the mold between the rotary mold and a mold attached to at least one of the fixed platen and the movable platen. In an injection molding machine for laminating molding having a rotating disk,
With the turntable and movable plate integrated through a protective block, the mold attached between the fixed plate and the turntable can be opened and closed and clamped.
Corresponding unevenness in the mold opening and closing direction between the rotating part and the rotation support part of the rotating disk, and the protective block is an unevenness that unifies the rotating disk and the movable disk in contact with the rotating part and the rotation support part of the rotating disk. Has a shape,
Since the extrusion pin of the product extruding means arranged in the protection block is configured to pass through the turntable, when normal forming is performed between the fixed plate and the turntable, the layer forming to the normal forming or vice versa. Replacement work can be simplified.

Further, the injection molding method according to the present invention employs such an injection molding machine for laminated molding according to the present invention, and in a state where the rotating disk and the movable disk are integrated via a protective block, A mold cavity is formed by combining molds mounted between rotating plates,
A fixed platen and a rotating plate are used to push the extrusion pin of the product extruding means arranged in the protection block through the rotating plate and perform the product extrusion operation of the molded product held in the mold attached to the fixed plate side of the rotating plate. When normal molding is performed between the panels, it is possible to simplify the changeover operation from lamination molding to normal molding or vice versa.

It is a schematic plan view which shows the step change process from lamination molding to normal shaping | molding of the injection molding machine for lamination molding which concerns on Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan cross-sectional view showing product extrusion means and product extrusion operation after changeover to normal molding in an injection molding machine for laminate molding according to Example 1 of the present invention. It is a schematic plane sectional drawing which shows the product extrusion means and product extrusion operation | movement after the change to normal shaping | molding in the injection molding machine for lamination molding which concerns on Example 2 of this invention. It is a general | schematic plane sectional view which shows the product extrusion means after the change to the normal shaping | molding in the injection molding machine for lamination molding which concerns on Example 3 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic plan view showing a step change process from laminate molding to normal molding of an injection molding machine for laminate molding according to Embodiment 1 of the present invention. FIG. 1 (a) shows the mold opening state after lamination molding (before the changeover), FIGS. 1 (b) to (d) show the protective block attachment process, and FIGS. 1 (d) to (f) show the general-purpose mold attachment. The process, FIG.1 (g) shows the mold open state after completion of the changeover to normal molding. FIG. 2 is a schematic plan sectional view showing the product extrusion means and the product extrusion operation after the changeover to the normal molding in the injection molding machine for laminate molding according to Embodiment 1 of the present invention. FIG. 2 (a) shows the product extruding means after changing to normal molding, and FIG. 2 (b) shows the product extruding operation. Note that the hatched portion in the drawing means a cross section.

  First, referring to FIG. 1 (a), the configuration of an injection molding machine for laminate molding according to Example 1 of the present invention will be described, and then the transition from laminate molding to normal molding will be described with reference to FIG. The process will be described.

  As shown in FIG. 1 (a), the injection molding machine 1 for laminate molding is movable in the mold opening / closing direction with respect to the stationary platen 3 by a stationary platen 3 to which the stationary die 3a is attached and a mold clamping device (not shown). And a movable platen 5 to be arranged. A movable mold 5 a is attached to the movable platen 5. A rotating disk 4 including a rotating part 41 and a rotation support part 42 is arranged between the fixed board 3 and the movable board 5.

  The rotating part 41 of the turntable 4 is supported by a rotation support part 42 so as to be rotatable around a rotation axis 43 in the vertical direction. Two rotating molds (a first rotating mold 4a and a second rotating mold 4b) are attached to the rotating portion 41 so as to face each other, and the rotating portion 41 is rotated by a rotation driving means (not shown). By moving 4 in the mold opening / closing direction, both of the two rotary molds can be opened / closed and clamped with respect to both the fixed mold 3a and the movable mold 5a. The turntable 4 is moved by a turntable moving means (not shown), and the rotation support portion 42 is guided to a tie bar (not shown). The rotation support part 42 may be configured to be placed on the turntable moving means.

  Further, the first injection unit 6 can be injected and filled into the fixed mold 3a through the insertion hole 3b penetrating in the thickness direction of the fixed plate 3 on the back surface (right side of the drawing) of the surface of the fixed plate 3 to which the fixed mold 3a is attached. Is arranged. Further, the second injection unit 7 is disposed so as to be capable of injection filling in a mold cavity formed between at least one of the fixed mold 3a and the rotating mold and between the rotating mold and the movable mold 5a. ing. The second injection unit 7 is arranged at various positions such as the side surface or upper side of the injection molding machine or the back surface (left side of the drawing) of the surface to which the movable mold 5a of the movable plate 5 is attached.

  In such an injection molding machine 1 for laminated molding, generally, a mold cavity formed between the fixed mold 3a and one rotary mold is injected and filled (primary molding) from the first injection unit 6. After the primary molded body is molded, the primary molded body is rotated while being held by one rotary mold, and is formed between the one rotary mold holding the primary molded body and the movable mold 5a. A new mold cavity is injection-filled (secondary molding) from the second injection unit 7, and the secondary molded body is laminated and molded on the primary molded body. In parallel with the secondary molding, the primary molding described above is performed in the mold cavity formed between the fixed mold 3a and the other rotary mold, and between the rotary disk 4 and the movable disk 5 is performed. A laminated molded product composed of a primary molded body and a secondary molded body is continuously molded every time the mold is opened.

  In the injection molding machine 1 for laminate molding, the rotary mold is rotated in a state where the primary molded body is held by the fixed mold 3a, and again between the fixed mold 3a holding the primary molded body and the rotary mold. Various lamination molding methods, such as a form in which secondary molding is performed in a new mold cavity formed in the present invention, are possible, but since they are not directly related to the present application, further explanation of the lamination molding method is omitted.

  Next, with reference to FIG. 1, a step change process from lamination molding to normal molding will be described. Fig.1 (a) is the mold open state after lamination molding (before changeover). From this state, the first injection unit 6 and the second injection unit 7 are separated from the mold for injection filling. Thereafter, the fixed mold 3a, the first rotating mold 4a, the second rotating mold 4b, and the movable mold 5a for laminate molding are removed from each panel and carried out of the injection molding machine. Although not shown, after the mold open state in FIG. 1A is once changed to the mold closed state, the fixed mold 3a, the first rotary mold 4a, the second rotary mold 4b, and the movable mold 5a are integrated. Then, after being supported by a crane facility or a mold exchanging device, the fixing between the respective molds and the panel is released, and each mold may be carried out of the injection molding machine. If the rotating part 41 of the rotating disk 4 can be separated from the rotating disk 4 in consideration of mold replacement, all the molds including the rotating part 41 may be carried out integrally.

  After all the molds for lamination molding have been carried out, as shown in FIG. 1 (b), the protection block 60 is carried between the turntable 4 and the movable platen 5 by crane equipment or a die changer. . When the protection block 60 is carried between the panels using a mold exchanging device, the protection block 60 can be positioned with high accuracy and automatically. When carrying the protection block 60 between the panels with a crane facility or the like, in order to make it easier to carry the protection block 60 between the boards, the turntable 4 is moved to the fixed platen 3 side, May be secured more widely.

  Here, the protection block 60 is integrated for normal molding, and protects the mold mounting surfaces of the rotary plate 4 and the movable plate 5 that are in direct contact from repeated mold opening and closing operations and mold clamping operations. It will be carried in. Therefore, the protection block 60 preferably integrates the rotating disk 4 and the movable disk 5 in a state where the protective block 60 is in contact with the rotating part 41 and the rotation support part 42 of the rotating disk 4. That is, if the protection block 60 has an area that reaches the rotation support portion 42 beyond the rotation portion 41 of the turntable 4, the molds of the rotation portion 41 and the rotation support portion 42 of the turntable 4 as shown in FIG. Even if there are irregularities in the opening and closing direction, by providing an irregular shape corresponding to the irregularities, the rotating plate 4 and the movable platen 5 are integrated in a state where they are in contact with the rotating unit 41 and the rotating support unit 42, and the mold in normal molding It is possible to more widely disperse and reduce the surface pressure acting on the mold mounting surfaces of the rotating disc 4 and the movable disc 5 via the rotating portion 41 during opening and closing and mold clamping.

  Although not shown in the drawing, the unevenness in the mold opening / closing direction of the rotating part 41 and the rotating support part 42 of the rotating disk 4 is opposite to that in FIG. 1 (the thickness of the rotating part 41 is larger than the thickness of the rotating support part). However, it is possible to provide the protective block 60 with an uneven shape corresponding to this. Even when there is no such unevenness, it is more preferable that the protection block 60 has a flat plate shape having an area in contact with the rotating part 41 and the rotating support part 42 of the rotating disk 4. Needless to say, the surface pressure acting on the mold mounting surface is reduced.

  The product pushing means 70 is disposed (built in) in the protective block 60, and details thereof will be described later with reference to FIG. Thus, for simplicity of illustration, the product extrusion means 70 is not shown in FIG.

  After the protective block 60 is carried to a predetermined position, the rotating disk 4 is moved to the movable panel 5 side as shown in FIG. Even after the turntable 4 comes into contact with the protection block 60, the turntable 4 continues to move, and the turntable 4 and the movable platen 5 are integrated via the protection block 60 as shown in FIG. . After confirming that the turntable 4, the protection block 60, and the movable platen 5 are integrated by a sensor (not shown), the turntable 4, the protection block 60, the protection block 60, and the movable platen 5 are fixed. For each fixing, a known fixing means such as a clamp device may be employed.

  After the turntable 4, the protection block 60, and the movable platen 5 are integrated and confirmed to be fixed to each other, as shown in FIG. 1 (d), a fixed mold for normal molding is used by a crane facility or a die changer. In a state where 30a and the movable mold 50a are integrated, they are carried between the fixed mold 3 and the turntable 4. When the fixed mold 30a and the movable mold 50a are carried between the panels by a mold exchanging device, the mold can be positioned with high accuracy and automatically. After these molds are carried to a predetermined position, as shown in FIG. 1 (e), the integrated turntable 4, protective block 60 and movable platen 5 (hereinafter: movable platen unit 50 for normal molding) It is moved to the stationary platen 3 side by a mold clamping device (not shown). After the stationary platen 3, the stationary die 30a and the movable die 50a, and the normal molding movable platen portion 50 are in the mold closed state (FIG. 1 (f)), the stationary die 30a is placed on the stationary platen 3, and the movable die 50a is placed on the stationary platen 3. Usually, it is fixed to the movable molding platen 50. For each fixing, a known fixing means such as a clamp device may be employed. After the fixing of the fixed mold 30a and the movable mold 50a to the respective panels is confirmed by a sensor or the like (not shown), the integration of the fixed mold 30a and the movable mold 50a is released, and the movable mold 50a is released by a mold clamping device (not shown). When the mold is opened, the mold is opened as shown in FIG.

  The changeover process from normal molding to lamination molding is basically the reverse of the changeover process from lamination molding to normal molding described above, and the analogy from the previous explanation is easy, I will omit the explanation.

  Next, a product extrusion operation during normal molding by the injection molding machine for laminated molding according to Example 1 of the present invention will be described with reference to FIG. FIG. 2 shows in more detail the mold opening state after completion of the changeover to the normal molding shown in FIG.

  As shown in FIG. 2A, the product pushing means 70 is disposed (built in) in the protection block 60. The product extruding means 70 is composed of an extruding plate 70b to which a plurality of extruding pins 70a are fixed and a driving means (not shown), and the front end of the extruding pin 70a does not protrude from the end face of the protective block 60 on the rotating disk 4 side. In position. The drive means (not shown) of the product push-out means 70 is configured to be able to move the push-out plate 70b by an arbitrary amount in the mold opening / closing direction by means of an electric drive means combining a hydraulic cylinder, a servo motor and a ball screw.

  In addition, a plurality of through holes 41 a are processed in the rotating portion 41 of the turntable 4 fixed to the protective block 60 so as to be coaxial with the plurality of extrusion pins 70 a of the product extrusion means 70. The plurality of through holes 41a are for allowing the plurality of extrusion pins 70a of the product extrusion means 70 to penetrate therethrough. On the other hand, a movable mold 50a for normal molding is attached to the surface of the rotating disk 4 on the fixed disk 3 side. The movable die 50a incorporates a product extruding means 51 composed of a product extruding plate 51b to which a plurality of product extruding pins 51a are fixed. The product push-out means 51 has a return mechanism that is pressed by an elastic body (not shown) such as a spring return and maintains the retreat limit position. The tip of the product push-out pin 51a is movable at the retreat limit position. 50a is configured to form a mold cavity surface. On the product extrusion plate 51b side (protective block 60 side) of the movable die 50a, a plurality of through holes 51c communicating from the end surface of the product extrusion plate 51b to the end surface of the movable die 50a are coaxial with the through hole 41a of the turntable 4. Individually processed. The through hole 51c is for allowing the plurality of extrusion pins 70a of the product extrusion means 70 to penetrate.

  After the changeover process from the normal molding to the lamination molding is completed, as shown in the upper part of FIG. 2B, the product extruding means 70 is moved to the fixed mold 30a side by the driving means (not shown). The push pin 70a is passed through the through hole 41a of the rotating part 41 and the through hole 51c of the movable die 50a, and the tip of the push pin 70a is brought into contact with the end surface of the push plate 51b of the movable die 50a. This state is the standby position of the product pushing means 70 during normal molding. In FIG. 2, the extrusion pin 70a of the product extruding means 70 and the product extrusion pin 51a of the movable die 50a are arranged in a straight line, but the extrusion pin 70a is placed on any of the end surfaces of the extrusion plate 51b of the movable die 50a. You may contact | abut to a part and there is no restriction | limiting in arrangement | positioning of these two types of extrusion pins.

  Thus, after the injection molding is completed in the normal molding and the molded product is opened while being held by the movable mold 50a, the product pushing means 70 is moved from the standby position as shown in the lower part of FIG. 2B. Further, the push-out plate 51b of the movable die 50a is pressed by the push-out pin 70a. By this pressing, the tip of the product extruding pin 51a of the movable mold 50a protrudes from the mold cavity surface, and the molded product held by the movable mold 50a can be separated from the mold cavity surface (product extrusion operation). After the product push-out operation is completed, when the product push-out means 70 is moved to the movable platen 5 side (hereinafter referred to as retreat) and returned to the standby position, the product push-out pin 51a of the movable die 50a is also retracted by the return mechanism described above. Return to position.

  As described above, the rotating plate 4 and the movable platen 5 are integrated through the protective block 60, so that the molds of the rotating plate 4 and the movable platen 5 that are integrated for normal molding and are brought into a direct contact state. The mounting surface can be protected from repeated mold opening and closing operations and mold clamping operations. Further, the product pusher 70a of the product pusher 70 disposed (incorporated) in the protective block 60 is configured to pass through the turntable 4 (rotary part 41), so that the pusher 70a allows the product pusher 51 of the movable mold 50a to be moved. The product can be pushed out directly and the molded product held on the movable platen 50a can be pushed out.

  Further, since the product pushing means 70 is disposed (built in) the protection block 60, the placement of the product extrusion means 70 for normal molding is completed by attaching the protection block 60 to the movable platen 5. Therefore, unlike the injection molding machine of Patent Document 1, it is not necessary to extend the extrusion pin (rod / ejector pin) in the changeover process to normal molding, and the configuration of the product extrusion means 70 is simple. Furthermore, when a mold changing device is provided in the injection molding machine for laminate molding, the protective block 60 and the mold for normal molding are removed from the delivery of the mold for laminate molding in the changeover process to the normal molding. It is suitable for automating a series of changeover processes until the mold is carried in. As described above, the product extruding operation after the changeover does not become an obstacle to the automation of the changeover process because it is only necessary to advance the product extruding means 70 to the standby position during normal molding.

A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic plan cross-sectional view showing product extrusion means and product extrusion operation after changeover to normal molding in an injection molding machine for laminate molding according to Embodiment 2 of the present invention. FIG. 3 (a) shows the product extruding means after changing to normal molding, and FIG. 3 (b) shows the product extruding operation. As in FIGS. 1 and 2, the hatched portion in the drawings means a cross section. The difference between the second embodiment and the first embodiment is that, after completion of the changeover process to the normal molding in the first embodiment, the penetration portion of the extrusion pin 70a of the product pushing means 70 that penetrates the rotating disk 4 has an automatic desorption mechanism. And is inserted in the through hole of the rotating disk 4 in advance. Since the other basic configuration and injection molding method of the other layer molding injection molding machine 1 are basically the same as those of the first embodiment, only differences from the first embodiment will be described.

  FIG. 3 illustrates in more detail the mold opening state after completion of the changeover to the normal molding shown in FIG. Since the configuration on the fixed platen 3 side is the same as that of the first embodiment, the illustration is omitted. As shown in FIG. 3A, the product pushing means 170 is disposed (built in) the protective block 160. The product extruding means 170 includes an extruding plate 170b to which a plurality of extruding pins 170a are fixed and a driving means (not shown), and the front end of the extruding pin 170a does not protrude from the end surface of the protective block 160 on the rotating disk 4 side. In position. In the second embodiment, the integrated rotating disk 4, protective block 160, and movable platen 5 as shown in FIG.

  A plurality of through holes 41 a are processed in the rotating portion 41 of the turntable 4 fixed to the protective block 160 so as to be coaxial with the plurality of extrusion pins 170 a of the product extrusion means 170. Here, in the second embodiment, the through-extrusion pin 180a is inserted (penetrated) into the through hole 41a in advance. As shown in FIG. 3C, the through-extrusion pin 180a has, at one end thereof (protective block 160 side), an automatic desorption mechanism 180b that can be optionally desorbed from the push pin 170a.

  The penetrating push pin 180a is in a penetrating standby position where one end and the other end (movable mold 50a side) having the automatic detaching mechanism 180b do not protrude from the end face of the protection block 160, and the position holding means (not shown) It is held at the penetrating standby position. This is the same also at the time of lamination molding, and it does not have any influence at the time of mold attachment for lamination molding, or lamination molding. This position holding means does not hinder the product extrusion operation (including the return operation) at the time of normal molding, and the through-extrusion pin 180a is not attached to the rotating disk 4 (rotating part 41). A simple drop prevention means (structure) for preventing the drop from the through hole 41a may be used. On the other hand, a movable mold 50a for normal molding is attached to the surface of the rotating disk 4 on the fixed platen 3 side, but since this is the same configuration as in the first embodiment, description thereof is omitted.

  After the changeover process from the normal molding to the lamination molding is completed, as shown in the upper part of FIG. 3B, the product pushing means 170 is advanced by the driving means (not shown) toward the fixed mold 30a (not shown). By this advance, the tip of the push pin 170a is inserted into the automatic desorption mechanism 180b of the through push pin 180a inserted (penetrated) into the through hole 41a of the rotating portion 41 (rotary disc 4). The pin 180a is integrated. Further, the product extruding means 170 is advanced, and the tip of the penetrating push pin 180a is brought into contact with the end surface of the push plate 51b of the movable die 50a. This state is the standby position of the product pushing means 70 during normal molding.

  Thus, after the injection molding is completed in the normal molding and the molded product is opened while being held by the movable mold 50a, the product pushing means 70 is moved from the standby position as shown in the lower part of FIG. Further, the extrusion plate 51b of the movable mold 50a is pressed by the penetrating extrusion pin 180a. By this pressing, the tip of the product extruding pin 51a of the movable mold 50a protrudes from the mold cavity surface, and the molded product held by the movable mold 50a can be separated from the mold cavity surface (product extrusion operation).

  The position holding means of the through-extrusion pin 180a inserted (penetrated) into the through-hole 41a of the rotating part 41 (the rotating disk 4) and the automatic desorption mechanism 180b of the through-extrusion pin 180a are configured using an elastic body. Since various known techniques such as a configuration using a drive source such as an electromagnet or a hydraulic power source may be adopted as appropriate, a detailed description is omitted. In the changeover operation from the normal molding to the lamination molding, the product extruding means 170 is retracted, and when the penetrating push pin 180a reaches the penetrating standby position, the receding is stopped and the position holding means (not shown) penetrates the product. Hold the standby position. If the automatic desorption mechanism 180b is opened and the product pushing means 170 is retracted to the standby position, the state shown in FIG. 3 (a) is obtained, and the changeover operation can be advanced to the next step.

In such form of Example 2 was divided extrusion pin product pushing means 170 disposed in the protective block 160 (internal), by inserting the tip into the through hole of the rotary disc 4, protective The thickness of the block 160 in the mold opening / closing direction can be greatly reduced. This can be easily understood by comparing FIG. 2 of the first embodiment and FIG. 3 of the second embodiment. The greatest effect of this form is that there is less restriction on the mold thickness of the normal mold that can be used.

  Further, the integration and division of the extrusion pin 170a and the penetration push pin 180a may be automatically performed by the automatic desorption mechanism 180b of the penetration extrusion pin 180a and the position holding means of the penetration extrusion pin 180a as described above. . When the same integration and division are performed by the injection molding machine of Patent Document 1, the extrusion pin (rod) has to have a three-divided structure with respect to the two divisions of the second embodiment. That is, since the rod 51 connected to the original rod 44 (extrusion pin) of the ejector 31 is divided and arranged in two places, the hole 59 of the dummy mold 58 and the hole 52 of the rotating disk 18, the through-extrusion extrusion pin is automatically detached. It is necessary to add another set of mechanism and position holding means for the penetrating push pin. As a result, the structure of the product extrusion means must be complicated.

  Embodiment 3 of the present invention will be described with reference to FIG. FIG. 4 is a schematic plan cross-sectional view showing product extrusion means after changeover to normal molding in the injection molding machine for laminated molding according to Embodiment 3 of the present invention. FIG. 4A shows a product extruding means based on the configuration of the first embodiment, and FIG. 4B shows a product extruding means based on the configuration of the second embodiment. As in FIG. 3, the hatched portion in the drawing means a cross section. The difference between the first embodiment and the second embodiment in the third embodiment is that the product pushing means 70 (170) arranged in the protection block 60 (160) is operated by another product pushing means arranged in the movable platen 5. It is a point to make. Since the other basic configurations, injection molding methods, and product extrusion operations of the multilayer molding injection molding machine 1 are basically the same as those of the first and second embodiments, only differences from these embodiments will be described.

  The product extruding means based on the configuration of Example 1 shown in FIG. On the back surface (left side of the drawing) of the movable platen 5 is disposed a product pushing means 80 composed of a push plate 80b to which a plurality of push pins 80a are fixed and a drive means (not shown). The tip of the push pin 80a is in a retreat limit position that does not protrude from the end surface of the movable platen 5 on the rotary plate 4 side through a through hole 5c provided in the movable platen 5. The drive means (not shown) of the product extruding means 80 is configured to be able to move the push plate 80b by an arbitrary amount in the mold opening / closing direction by an electric drive means combining a hydraulic cylinder, a servo motor and a ball screw. The product extruding means 80 arranged on the back surface of the movable platen 5 is usually for performing a product extruding operation of a molded product held in a movable mold attached to the movable platen 5.

  On the other hand, the product extruding means 70 of the protection block 60 is the same as the first embodiment in that it has an extruding plate 70b to which a plurality of extruding pins 70a are fixed. In addition, similar to the product pushing means 51 of the movable mold 50a, there is a difference in that it has a return mechanism (not shown) in which the retreat limit position of the product pushing means 70 is maintained.

  Thus, after the injection molding is completed in the normal molding and the molded product is opened with the movable mold 50a held, the product extruding means 80 is advanced from the standby position by a driving means (not shown), and the tip of the extruding pin 80a. Is brought into contact with the end surface of the extrusion plate 70b of the product extrusion means 70 through the through hole 61c. The product extruding means 80 is further advanced against the pressing of the return mechanism of the product extruding means 70, and the tip of the extruding pin 70a of the product extruding means 70 is brought into contact with the end surface of the product extruding plate 51b of the movable die 50a. This state is the standby position of the product extruding means 70 during normal molding shown in the upper part of FIG. When the product extruding means 80 is further advanced from here, the product extruding means 51 of the movable mold 50a is operated via the product extruding means 70 of the protective block 60, as shown in the lower part of FIG. The product extrusion operation of the molded product held by the movable mold 50a can be performed.

  The product pushing means based on the configuration of Example 2 shown in FIG. 4B is the same as described above. That is, the product pushing means 80 is advanced from the standby position by a driving means (not shown), and the tip of the pushing pin 80a is brought into contact with the end surface of the pushing plate 170b of the product pushing means 170. The product extruding means 80 is further advanced against the pressing of the return mechanism of the product extruding means 170, and the tip of the extruding pin 170a of the product extruding means 170 is inserted into the through hole 41a of the rotating portion 41 (rotary disc 4) ( When inserted into the automatic desorption mechanism 180b of the penetrating push pin 180a that has been penetrated, the push pin 170a and the penetrating push pin 180a are integrated.

  Then, the product extruding means 80 is further moved forward so that the tip of the through-extrusion pin 180a is brought into contact with the end surface of the extruding plate 51b of the movable die 50a. This state is the standby position of the product extruding means 70 during normal molding shown in the upper part of the drawing of FIG. From this point, when the product extruding means 80 is further advanced, the product extruding means 51 of the movable mold 50a is operated via the product extruding means 170 of the protective block 160, as shown in the lower part of FIG. The product extrusion operation of the molded product held by the movable mold 50a can be performed.

  As described in the first and second embodiments, in the form of the first embodiment, the configuration of the product extruding means arranged in the protective block 60 is simple, and in the second embodiment, the protective block 160 The thickness in the mold opening / closing direction can be greatly reduced. Therefore, whether the configuration of the third embodiment is implemented on the premise of the configuration of the first embodiment or the second embodiment depends on the configuration features of the first embodiment and the second embodiment and the protection block 60 (160). Alternatively, it may be appropriately determined in view of the thickness in the mold opening / closing direction of the rotating disk 4 (rotating part 41) and the mechanical specifications such as the extrusion stroke of the product extruding means 80 disposed on the back surface of the movable panel 5. .

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, in the second embodiment, the tip of the extrusion pin 170a of the product extrusion unit 170 is inserted into the automatic desorption mechanism 180b of the through-extrusion pin 180a and the extrusion pin is integrated. A configuration in which an automatic detachment mechanism 180b is disposed at the tip of the pin 170a may be employed.

  Moreover, the structure in which the front-end | tip of the extrusion pin 170a of the product extrusion means 170 in Example 2 is inserted in the automatic removal | desorption mechanism 180b of the penetration extrusion pin 180a, and an extrusion pin is integrated is not essential. This is because, as long as the forward direction of the through-extrusion pin 180a is not pressed in the forward direction, the movement is limited at the end surface of the product extrusion plate 51b of the product extrusion means 51 in which the backward limit position is maintained by the return mechanism. This is because the movement is restricted at the tip of the push pin 170a of the product pusher 170 disposed (incorporated) in the protective block 160.

  Due to the movement limitation in the longitudinal direction of the through-extrusion pin 180a, even if there is no automatic desorption mechanism 180b, as long as there is a position holding means, during the product extruding operation (at the time of advance), the extruding pin 170a moves forward. The product push pin 51a can be advanced in a state where the tip of the pin 180a is in contact with the end surface of the product push plate 51b. On the other hand, when returning (backward), the tip of the through-extrusion pin 180a is pressed in the backward direction by the return mechanism of the product pushing means 51, so that the rear end of the through-extrusion pin 180a abuts against the tip of the extrusion pin 170a. In this state, the push pin 170a can be pressed in the backward direction. The adoption of the automatic desorption mechanism 180b may be appropriately selected according to the situation, such as the length of the through-extrusion pin 180a.

DESCRIPTION OF SYMBOLS 1 Injection molding machine 3 Multilayer molding Fixed platen 3a Fixed type | mold 4 Rotary platen 4a First rotary type | mold 4b Second rotary type | mold 5 Movable platen 5a Movable type | mold 30a Fixed type | mold 41 Rotation part 41a Through-hole 42 Rotation support part 50 Movable for normal shaping | molding Plate part 50a Movable mold 60 Protective block 70 Product extruding means 70a Extruding pin 70b Extruding plate 80 Product extruding means 80a Extruding pin 80b Extruding plate 150 Movable platen part for normal molding 160 Protection block 170 Product extruding means 170a Extruding pin 170b Extruding plate 180a Through Extrusion pin

Claims (4)

An injection molding machine for laminated molding having at least two rotary molds, and having a rotary disk capable of opening / closing and clamping a mold between the rotary mold and a mold attached to at least one of a fixed platen and a movable platen ,
In a state where the rotating plate and the movable plate are integrated via a protection block, the mold attached and closed between the fixed plate and the rotating plate can be opened and closed, and the mold can be clamped.
The protection block is in contact with the rotating part and the rotation support part of the rotating disk in correspondence with the unevenness of the rotating part and the rotation support part of the rotating disk in the mold opening and closing direction. It has an uneven shape that integrates the movable platen,
An injection molding machine for laminated molding configured to allow an extrusion pin of a product extrusion means arranged in the protection block to pass through the rotating disk.   The extruding pin of the product extruding means is divided in the longitudinal direction, and the through portion of the extruding pin to the rotating plate is divided, and the divided through portion is inserted into the through hole of the rotating plate. The injection molding machine for laminate molding according to claim 1.   The injection molding machine for laminate molding according to claim 1 or 2, wherein the product pushing means is operated by another product pushing means arranged on the movable platen. In a state where the rotating plate and the movable plate are integrated through the protection block, injection molding is performed in a mold cavity formed by combining molds attached between the fixed plate and the rotating plate. ,
The extrusion pin of the product extrusion means arranged in the protective block is made to penetrate the rotary disk, and the product extrusion operation of the molded product held on the mold attached to the fixed disk side of the rotary disk is performed. An injection molding method using the injection molding machine for laminate molding according to any one of claims 1 to 3.

Images