JP5682820B2 - Rotating mold support device and multilayer molding method - Google Patents

Description

  The present invention relates to an injection molding machine that forms a multilayer molded article using a rotating die that is disposed between a fixed platen and a movable platen and combined with a die attached to at least one of the fixed platen and the movable platen. The present invention relates to a rotary mold support device and a multilayer molding method.

  Various molding methods such as those characterized by molding equipment or molding dies as molding methods for multilayer molded products consisting of various combinations of different materials, same materials, different colors, and same colors in resin molded products It has been known. One of them is a molding method in which a multilayer molded product is molded using a fixed mold, a movable mold, and a set of molds composed of a rotating mold rotated between the fixed mold and the movable mold. .

  Patent Document 1 discloses a mold including a fixed mold (fixed mold), a movable mold (movable mold), and a rotating mold (rotating mold portion) that rotates between the fixed mold and the movable mold. An injection molding machine for molding a multi-material molded product (multilayer molded product) using a first injection device that abuts against the fixed mold and injects the molten material, and abuts against the movable mold to inject the molten material A second injection device, a rotary support device (rotary mold support device) that supports the rotary die from a fixed plate so as to be rotatable and movable in a movable movement direction, and via the rotary die. A multi-material injection molding machine comprising a fixed mold and a compression means (mold opening / closing device) for compressing the movable mold is disclosed.

  Patent Document 2 discloses a stationary mold (fixed mold) attached to a fixed platen, and a movable plate that is connected to the fixed plate via a plurality of tie bars and is opened and closed with respect to the fixed platen. A movable side mold (movable mold) attached to the rotating side mold, a reversing or rotating side mold (rotating mold part) provided between the fixed side mold and the movable side mold, and the rotating side mold. A rotating mold holding frame that rotatably supports the mold, wherein the fixed side mold, the movable side mold, and the rotating side mold are disposed inside the plurality of tie bars, The mold holding frame body is formed in a cross beam shape by a frame member located outside the plurality of tie bars, and is coupled to the fixed side mold and the movable side mold via a gap holding member, so that the movable When the side mold is opened, the fixed side mold and the movable side mold are moved by the spacing member. Is moved to a substantially intermediate position between the fixed side mold, the rotary side mold, and the movable side mold, the multicolor molding mold is driven so that the mold is closed. It is disclosed.

  In addition, the parentheses in the descriptions regarding the above-mentioned Patent Document 1 and Patent Document 2 describe the constituent requirements of the present invention that are considered to be equivalent to or similar to the constituent requirements immediately before the parentheses so that the understanding of the present invention is easy. Therefore, it does not suggest that the constituent requirements immediately before the parenthesis and the constituent requirements in the parenthesis match.

JP 2006-168223 A JP 2010-064278 A

  The multi-material injection molding machine of Patent Document 1 is described as having a simple configuration and easy to remodel based on a general-purpose injection molding machine. And, because all the mechanisms that rotate the rotation type around the vertical axis are attached to the fixed platen, these mechanisms become complicated, and the load and moments of these mechanisms are all supported by the fixed platen. It is difficult to say that additional remodeling is easy based on a general-purpose injection molding machine. Also, as an injection molding machine dedicated to multilayer molding, according to this configuration, the support member for supporting the rotational mold and driving it in the mold opening / closing direction is provided with a rotational mold from above the fixed plate to above and below the compression means. It is extended to the mold opening limit position, and is attached and detached from above the compression means using a set of existing equipment such as an overhead crane as a set of molds that combine a fixed mold, a rotating mold, and a movable mold. There is a problem that it is difficult. There is also a description that if the rotary mold is rotated around the horizontal axis, the upper part of the mold is opened and the mold can be easily detached, but in this case, even if the mold is open, Since all the mechanisms for driving and rotating the rotary mold are arranged on both sides of the mold, there is a problem that the product can be taken out only from the vertical direction of the mold. At the same time, since the accessibility from both sides to the mold deteriorates, the workability at the time of mold maintenance and failure handling also deteriorates, which is not a realistic form.

  In the multicolor molding mold of Patent Document 2, a rotating mold disposed between a fixed mold and a movable mold is rotatably supported by a rotating mold holding frame, As the movable mold is moved in the mold opening / closing direction, the rotating mold is moved to the substantial intermediate position between the fixed mold and the movable mold through the interval holding member. The holding frame is coupled to the fixed mold and the movable mold. Therefore, unlike Patent Document 1, there is no need to additionally modify a general-purpose injection molding machine with a mechanism for driving the rotating side mold in the mold opening / closing direction or a mechanism for rotating.

  Here, it is described that the multicolor molding die of Patent Document 2 can be manufactured at low cost based on a general-purpose injection molding machine. However, with respect to a rotating mold holding member that rotatably supports a rotating mold that is a heavy object, the rotating mold holding member is not supported / guided by the tie bar of the injection molding machine, and the fixed side mold, the movable side mold, and the gap holding member are Although it is clearly described that they are connected to each other, a concrete supporting method and means for guiding the movement in the mold opening and closing direction are guided by a guide rail or the like (not shown) (paragraph 0020). "There is no specific description at all. In other words, although it seems to be an important component, what kind of component is necessary for this "guide rail etc." is what is provided on the multicolor molding die side as a component If it is a general-purpose injection molding machine side, if so, how it is arranged with respect to the injection molding machine, supporting the load of the rotating mold holding member, and the mold opening and closing direction It is difficult to determine that it can be manufactured at low cost based on a general-purpose injection molding machine.

  Moreover, it is estimated that the metal mold | die for multilayer forming of patent document 2 has a problem in metal mold | die replacement | exchange. The multi-layer molding die of Patent Document 2 is a rotating die that rotatably supports a rotating side die with respect to a fixed side die, a rotating side die, and a movable side die arranged inside a tie bar. The mold holding frame body is formed in a cross beam shape by a frame member located outside the tie bar, and the rotating mold holding frame body is coupled to the fixed side mold and the movable side mold by a spacing holding member. That is, if estimated from this configuration, the fixed-side mold and the movable side arranged on the inner side of the tie bar are not removed unless the gap holding member coupled to the cross-shaped rotating mold holding frame arranged on the outer side of the tie bar is removed. It is difficult to attach and detach the mold from the mold opening / closing device. Next, the cross-girder-shaped rotating mold holding frame disposed outside the tie bar is difficult to attach and detach from the mold opening / closing device unless it is divided, and the rotating mold holding frame must be in a divided state. In this case, it is difficult to attach and detach the rotating side mold from the rotating mold holding frame. That is, the multicolor molding die of Patent Document 2 opens the upper part of the rotating mold holding frame body in a mold closed state, and the rotating mold holding frame body is coupled to the fixed side mold and the movable side mold. Unless the interval holding member is removed, it is difficult to detach from the mold opening / closing device as a set of molds in which the fixed mold, the rotary mold, and the movable mold are combined. In Patent Document 2, there is no description that specifically refers to a mold exchanging method based on the configuration of the disclosed multicolor molding mold. As described above, in the multi-color molding die of Patent Document 2, the die changing method is unclear, and the estimated die changing method is very difficult or even if possible. There is a problem of hanging.

  The present invention has been made in view of the above-described problems. Specifically, when the injection molding machine for single layer molding is diverted to the injection molding machine for multilayer molding, an additional modification to the injection molding machine is performed. In addition, a rotating mold supporting device that can be attached to and detached from the mold opening / closing device as a set of a fixed mold, a movable mold, and a rotating mold portion, and the rotating mold support. It aims at providing the multilayer molding method which uses the injection molding machine provided with the apparatus.

According to the first aspect of the present invention, as shown in claim 1, it is disposed between the fixed platen and the movable platen, and is connected so that one circular locus and one end of each circle are continuously in contact with the circular locus. A slide guide portion having a guide locus configured in the same plane with a set of parallel straight line tracks parallel to the mold opening and closing direction;
Two guide block portions guided by the guide locus of the slide guide portion;
The guide block portion is arranged so as to be separated by the same distance as the diameter of the circular locus, and is guided in parallel to the mold opening / closing direction in the parallel linear locus of the slide guide portion, and the circular locus in the circular locus A rotating mold support that is guided to rotate about a rotation axis passing through the center of
A first link having a connecting distance expansion / contraction function that connects one of the guide block portions and the movable platen and arbitrarily expands / contracts the distance between the respective connection portions;
A position at which the mold dividing surface of the rotating mold part disposed on the slide guide part and attached to the rotating mold support part is opposed to the mold dividing surface of the fixed mold and the movable mold; A positioning mechanism for positioning at a position rotated approximately 90 degrees;
It is achieved by a rotating mold support device characterized by comprising:

That is, the guide block portion itself is guided by the guide locus of the slide guide portion and can freely move, so that the guide block portion is separated from the rotating mold support portion by the same distance as the diameter of the circular locus of the slide guide portion. With this arrangement, it is possible to cause the rotating mold support part to perform a movement operation parallel to the mold opening / closing direction in a parallel linear locus and a rotation operation around a rotation axis passing through the center of the circular locus in a circular locus. it can. These movement / rotation operations are linked to the mold opening / closing operation of the movable platen by the first link connecting one of the guide blocks and the movable platen, and the positioning mechanism arranged in the slide guide part. Therefore, there is no need for dedicated drive means for these moving / rotating operations. As a result, it is possible to move and rotate the rotary mold support with a small number of member configurations, so when using an injection molding machine for non-single layer molding as an injection molding machine for laminate molding, injection molding Additional modifications to the machine can be reduced.

  Further, according to a second aspect of the present invention, a reverse rotation prevention mechanism is provided for arbitrarily limiting a sliding range of the first link so that the rotary mold support portion is rotated in an arbitrary direction along the circular locus. The rotating mold support apparatus according to claim 1 may be used.

  By providing such a reverse rotation prevention mechanism, it is possible to reliably prevent the rotating mold support part from rotating in an unintended direction when the rotating mold support part rotates in the circular locus of the slide guide part. Can do.

  Further, according to a third aspect of the present invention, the first link is composed of at least two link members having at least one link node, and the connection distance expansion / contraction function is a bending of the two link members in the link node. It is preferable that the rotating die support device according to any one of claims 1 to 2 is configured to arbitrarily hold and release the angle.

  As described above, if the bending angle of the link member in the link node is kept small, the distance between the connecting portions at both ends of the link member is shortened, and if the bending angle is kept large (maximum 180 degrees), the connecting ends of the link member are connected. The distance between the portions can be increased, and the distance between the connecting portions can be arbitrarily expanded and contracted even if the link itself is not configured to expand and contract.

  Moreover, about another structure of a 1st link, as shown in Claim 4, the said 1st link is two links arrange | positioned symmetrically with respect to the straight line which connects each said connection part, and the said connection The two link members are arranged so as to be rotatable around a portion, and both ends of the two links are rotatably connected at positions spaced apart from the connecting portion by an equal distance, and the reverse rotation prevention mechanism is configured as described above. The rotary mold support device according to any one of claims 1 to 3, wherein the two links are configured to arbitrarily expand and contract independently.

  If the first link is configured in this way, when the mold closing is started from the mold open state, one of the two links is held in the stretched state, and the other link is in a freely stretchable state. As a result, the connecting member is rotated by a predetermined angle about the coupling portion so as to absorb the mold closing amount of the movable platen, and the other link contracts. If the length of the other link contracted from this state is maintained, the rotating mold support part is rotated to the one link side in the extended state to the connecting portion in the middle of the two links having different lengths. A vector in the tangential direction of the rotation trajectory can be generated, and a rotation operation in an unintended direction can be prevented as a reverse rotation prevention mechanism.

  Further, as another aspect of the link, as shown in claim 5, a connection distance expansion / contraction is provided that connects the other of the guide block portions and the fixed plate and optionally expands / contracts the distance between the connection portions. The rotating die support device according to any one of claims 1 to 4, further comprising a second link having a function.

  The second link is disposed at a distance equal to the diameter of the circular locus relative to the first link connecting one of the guide block portions and the movable platen, that is, with respect to the center of the circular locus. In order to connect the other guide block portion at a symmetrical position to the stationary platen that is not movable, the mold opening / closing operation of the rotary mold support portion on the parallel linear locus is synchronized with the mold opening / closing speed of the movable platen. By extending and contracting the second link, a mold opening / closing force in the same direction as the mold opening / closing force by the first link is applied to the other guide block portion that is not connected to the first link. Further, during the rotation operation on the circular locus, the second link is contracted and extended in synchronization with the mold opening / closing operation of the movable platen, so that the second guide block portion not connected to the first link is moved to the first link block portion. The rotational force in the same rotational direction as that of one link can be applied to assist the mold opening / closing operation and the rotational operation of the rotational mold part.

  Further, as to these rotary mold support devices, as shown in claim 6, an injection molding machine comprising the rotary mold support device according to any one of claims 1 to 5. It is preferable to be used as

As for an injection molding machine equipped with these rotary mold support devices, as shown in claim 7, a fixed mold attached to the fixed plate, a movable die attached to the movable plate, and the rotation A fixed mold and a rotating mold part having two mold dividing surfaces which are combined with the fixed mold and the movable mold to form a mold cavity are clamped to form the fixed mold. A primary molded body is formed by injection-filling a mold cavity formed between one mold of the mold and the movable mold and one mold dividing surface of the rotating mold part 1 The next molding process,
The movable platen is opened in a state where the primary molded body is held by the rotating mold part, and the rotating mold part is opened from the fixed mold by the first link, and the rotation is performed. A mold opening step of rotating the mold parting surface of the mold part until it is substantially parallel to the mold opening and closing direction;
The movable platen is closed, and the first mold and the reverse rotation prevention mechanism are used to rotate the two mold dividing surfaces of the rotating mold part to a position facing a mold different from the primary molding process. And a mold closing step of closing the movable mold to the rotary mold part after the rotary mold part is closed to the fixed mold, and
The primary molded body held by the rotating mold part by clamping the fixed mold, the movable mold, and the rotating mold part, and the other of the fixed mold and the movable mold A secondary molding step of injection-filling a mold cavity formed by a mold and laminating a secondary molded body on at least a portion of the primary molded body;
A multilayer molding method using the injection molding machine according to claim 6 may be used.

  The injection molding machine equipped with these rotary mold support devices can be used to perform the multilayer molding method as described above, and because the rotary mold part is attached to the rotary mold support part, it is fixed. The mold, the movable mold, and the rotating mold portion can be attached to and detached from the rotating mold support apparatus and the mold opening / closing apparatus as a set of molds.

  Furthermore, as shown in claim 8, at least one of a mold opening / closing operation and a rotation operation of the rotating mold part is assisted by the second link. It may be a method.

The rotary mold support device according to the present invention is disposed between the fixed platen and the movable platen, and is in a mold opening / closing direction in which one circular locus and each end thereof are connected so as to continuously contact the circular locus. A slide guide portion having a guide locus configured in the same plane with a set of parallel parallel straight lines;
Two guide block portions guided by the guide locus of the slide guide portion;
The guide block portion is arranged so as to be separated by the same distance as the diameter of the circular locus, and is guided in parallel to the mold opening / closing direction in the parallel linear locus of the slide guide portion, and the circular locus in the circular locus A rotating mold support that is guided to rotate about a rotation axis passing through the center of
A first link having a connecting distance expansion / contraction function that connects one of the guide block portions and the movable platen and arbitrarily expands / contracts the distance between the respective connection portions;
A position at which the mold dividing surface of the rotating mold part disposed on the slide guide part and attached to the rotating mold support part is opposed to the mold dividing surface of the fixed mold and the movable mold; A positioning mechanism for positioning at a position rotated approximately 90 degrees;
Therefore, when the single layer molding injection molding machine is diverted to the multilayer molding injection molding machine, it is possible to reduce the additional modification to the injection molding machine.

Furthermore, a lamination molding method using an injection molding machine equipped with a rotary mold support device according to the present invention includes a fixed mold attached to the fixed plate, a movable mold attached to the movable plate, The fixed mold and the fixed mold and the movable mold, which are combined with the fixed mold and the movable mold, are clamped together with a rotary mold section having two mold dividing surfaces to form the mold cavity, and the fixed A primary molded body is formed by injection-filling a mold cavity formed between one of the mold and the movable mold and one mold dividing surface of the rotating mold part. A primary molding process;
The movable platen is opened in a state where the primary molded body is held by the rotating mold part, and the rotating mold part is opened from the fixed mold by the first link, and the rotation is performed. A mold opening step of rotating the mold parting surface of the mold part until it is substantially parallel to the mold opening and closing direction;
The movable platen is closed, and the first mold and the reverse rotation prevention mechanism are used to rotate the two mold dividing surfaces of the rotating mold part to a position facing a mold different from the primary molding process. And a mold closing step of closing the movable mold to the rotary mold part after the rotary mold part is closed to the fixed mold, and
The primary molded body held by the rotating mold part by clamping the fixed mold, the movable mold, and the rotating mold part, and the other of the fixed mold and the movable mold A secondary molding step of injection-filling a mold cavity formed by a mold and laminating a secondary molded body on at least a portion of the primary molded body;
Therefore, the fixed mold, the movable mold, and the rotating mold portion can be attached to and detached from the mold opening / closing device as a set of molds.

It is a schematic side view of the rotary mold support apparatus which concerns on Example 1 of this invention. It is a schematic plan view in the AA arrow view and BB arrow view in FIG. It is a schematic longitudinal cross-sectional view in CC arrow in FIG. It is a schematic longitudinal cross-sectional view in the DD arrow in FIG. It is the E section schematic enlarged view in FIG. It is the first half of operation | movement explanatory drawing of the rotary mold support apparatus which concerns on Example 1 of this invention. It is the operation | movement explanatory drawing latter half of the rotary die support apparatus which concerns on Example 1 of this invention. It is the first half of operation | movement explanatory drawing of the rotary mold support apparatus which concerns on Example 2 of this invention. It is the latter half of operation | movement explanatory drawing of the rotary die support apparatus which concerns on Example 2 of this invention. It is a schematic plan view of the rotary mold support apparatus which concerns on Example 3 of this invention. It is operation | movement explanatory drawing of the rotary die support apparatus which concerns on Example 3 of this invention. It is operation | movement explanatory drawing of the rotary die support apparatus which concerns on Example 4 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 side view of a rotary mold support apparatus according to Embodiment 1 of the present invention. FIG. 2 is a schematic plan view taken along arrows AA and BB in FIG. 2A is a schematic plan view in the direction of arrows AA in FIG. 1, and FIG. 2B is a schematic plan view in the direction of arrows BB in FIG. FIG. 3 is a schematic longitudinal sectional view taken along the line CC in FIG. 4 is a schematic longitudinal sectional view taken along the line DD in FIG. FIG. 5 is a schematic enlarged view of a portion E in FIG. FIG. 6 is the first half of the operation explanatory diagram of the rotary mold support device according to the first embodiment of the present invention, and FIG. 7 is the second half of the operation explanatory diagram of the rotary mold support device according to the first embodiment of the present invention.

  First, an outline of the rotary mold support apparatus 10 and the injection molding machine 1 to which the rotary mold support apparatus 10 is attached will be described. As shown in FIG. 1, the stationary platen 5 to which the stationary mold 20 is attached is fixed to the machine base portion 8. The movable platen 6 to which the movable mold 40 is attached so as to face the fixed platen 5 is guided by the tie bars 9 extended from the four corners of the fixed platen 5 and is opened and closed by the mold opening / closing device 7 that can also clamp the mold. It is arranged on the machine base 8 so as to be movable in the direction. A rotating mold support device 10 is attached between the fixed platen 5 and the movable platen 6 facing each other. The rotary mold part 30 supported by the rotary mold support device 10 is attached to the rotary mold mounting plate 31 so as to face the rotary mold mounting plate 31, the fixed platen 5 and the movable platen 6. The rotary mold part 30 is configured to be detachably attached to the rotary mold support part 11 of the rotary mold support device 10 via the rotary mold mounting board 31. ing. The rotary mold support portion 11 is connected to the movable plate 6 by a first link 14 via a first guide block portion 13a, and is arranged on the machine base portion 8 of the injection molding apparatus 1 via a support roller 17. It is moved / rotated on the part 12 in the mold opening / closing direction.

  The rotary mold mounting plate 31, the first rotary die 32 and the second rotary die 33 are a single die (rotary die) having two mold dividing surfaces facing the fixed platen 5 and the movable platen 6. It may be configured as a mold part 30) and may be detachably attached to the rotary mold support part 11. Further, the rotating mold part 30 may be configured to be rotatably supported around a horizontal rotation axis orthogonal to the mold opening / closing direction.

  Next, details of the rotating mold support device 10 will be described with reference to FIGS. 2 to 5. As shown in FIG. 2A (as viewed in FIG. 1A-A) and FIG. 2B (as viewed in FIG. 1B-B), the center of the slide guide portion 12 is on the longitudinal center line of the injection molding machine. A guide locus 12a composed of a single circular locus 12b and a set of parallel straight lines 12c parallel to the mold opening / closing direction connected so that one end of each circular locus 12b is continuously in contact with the circular locus 12b is in the same plane. Is formed. Then, the first guide block portion 13a and the second guide block portion 13b guided by the guide locus 12a are fixed to the lower portion of the rotary mold support portion 11 so as to be separated by the same distance as the diameter of the circular locus 12b. The mold support portion 11 is configured to be guided to the guide locus 12a via the two guide block portions. The first link 14 is composed of an actuator such as a hydraulic cylinder and is extendable and contractable. The first link 14 is rotatably connected to the first connecting portion 6a whose head side is on the longitudinal center line of the injection molding machine at the lower part of the movable platen 6, and the rod side to the first guide block portion 13a. The sliding range is arbitrarily limited by a reverse rotation prevention mechanism 14a composed of a hydraulic cylinder or the like disposed under the movable platen 6.

  Here, as shown in FIG. 3 (as viewed in FIG. 1C-C), the cross-sectional shape of the guide locus 12a is a T-groove shape, and the rotating mold is supported by two guide block portions adapted to this shape. Although the upward movement of the part 11 is restricted, these guide block parts do not support the loads of the rotating mold part 30 and the rotating mold support part 11, and these loads are not supported by the rotating mold support part 11. It is supported on the slide guide portion 12 via a support roller 17 disposed below. Further, as shown in FIG. 4 (FIG. 2 (a) DD arrow), the slide guide portion 12 has a positioning mechanism 15 composed of a hydraulic cylinder or the like in a mold opening / closing direction and a direction orthogonal to the mold opening / closing direction. The rotating mold part 30 is positioned by raising the cylinder rod and inserting it into a positioning hole provided in the rotating mold support part 11. Further, as shown in FIG. 5 (FIG. 2 (a) portion E), a guide roller 16 that is slidable within the guide locus 12a by a hydraulic cylinder or the like is disposed at a connection portion between the circular locus 12b and the parallel linear locus 12c. Therefore, the first guide block portion 13a and the second guide block portion 13b are surely applicable when the mold opening / closing operation and the rotation operation of the rotating mold support portion 11 are switched. Slide to guide the track.

  Next, the operation of the rotary mold support device 10 according to the multilayer molding process according to the first embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIGS. 6 and 7 are plan views illustrating the outline of the main constituent elements in order to explain the operation of the rotary mold support device 10. The vertical relationship of each component is assumed to be the same as that shown in FIGS.

  FIG. 6A shows a state where the injection filling and the cooling and solidification of the resin molded product in the mold cavity are completed and the mold opening is started. In this state, the first guide block portion 13a and the second guide block portion 13b are guided by the parallel linear locus 12c, and the first link 14 is in a minimum length state in which both the head side and the rod side are hydraulically free and extendable. The reverse rotation prevention mechanism 14a is also hydraulic free and has no sliding range limitation. When the mold opening operation of the movable platen 6 is started by the mold opening / closing device 7 (not shown), the movable mold 40 is opened from the second rotating mold 33 until the first link 14 extends to the maximum length.

  When the mold opening operation proceeds and the first link 14 is extended to the maximum length, as shown in FIG. 6 (b), the first link 14 is extended with the maximum length while the rotary mold portion 30 is being extended. The mold opening operation is started, and the first rotating mold 32 is opened from the fixed mold 20. Only one of the first guide block portions 13a is directly subjected to the mold opening force by the first link 14, but the other second guide block portion 13b is connected to the diameter of the circular locus 12b from the first guide block portion 13a. Since it is fixed to the rotating mold support 11 so as to be separated by the same distance, that is, the interval of the parallel linear trajectory 12c, the rotating mold part 30 attached to the rotating mold support 11 becomes the parallel linear trajectory 12c. Guided and opened.

  The mold opening operation of the movable platen 6 is continued, and when the first guide block portion 13a reaches the circular locus 12b from the parallel linear locus 12c as shown in FIG. 6C, as shown in FIG. 6D. The first guide block portion 13a is guided by the circular locus 12b, the second guide block portion 13b is also guided from the parallel linear locus 12c to the circular locus 12b, and the rotating mold portion 30 is counterclockwise around the center of the circular locus 12b. It is rotated. During this rotation operation, even if the outer surface portion of the circular locus 12b is not partially formed on the outer surface portion of the locus on which the second guide block portion 13b is guided, the first guide block portion 13a is surely attached to the circular track 12b. There is no problem in the rotating operation of the rotating mold part 30 by being guided and by guiding the second guide block part 13b to the inner side surface part of the circular track 12b. If the guide roller 16 (FIG. 2 (a) E portion and FIG. 5) (not shown) is slid so that the second guide block portion 13b is reliably guided by the circular locus 12b, the rotating die portion 30 is obtained. The rotational movement of the circular locus 12b can be made more stable.

  Further, when the mold opening operation of the movable platen 6 is continued and the first guide block portion 13a is guided to the intersection of the circular track 12b and the longitudinal center line of the injection molding machine, the maximum mold opening position is reached, and FIG. As shown in FIG. 6A, the rotary mold portion 30 is at a position rotated 90 degrees counterclockwise from the state of FIG. At this position, the mold opening of the movable platen 6 is stopped, and the positioning mechanism 15 in the mold opening / closing direction is operated to lock the position of the rotating mold part 30. The positioning mechanism 15 in FIG. 6 (e) is indicated by a black circle, which means that the positioning mechanism 15 is in operation. In order to prevent breakage of the first link 14 and the like, the mold opening speed is sufficiently reduced before the movable plate 6 reaches the maximum mold opening position, and the first link 14 has a sufficient cushion stroke. Or a mechanism that allows a predetermined amount of movement of the first link 14 in the longitudinal axis direction to at least one of the connecting portions between the first connecting portion 6a and the first guide block portion 13a is taken into consideration. Needless to say.

  In the mold open state of FIG. 6 (b) or FIG. 6 (c) described above, a multilayer molded product (not shown) held in one of the molds may be taken out of the mold by a product take-out means (not shown). When the product take-out means can be arranged on both sides with respect to the longitudinal direction of the injection molding machine, such as when a plurality of injection molding machines are arranged parallel to the longitudinal direction, the mold dividing surface of the mold is parallel to the mold opening / closing direction. The product may be taken out at the maximum mold opening position shown in FIG. In that case, product removal of the held multilayer molded product and maintenance of the mold cavity are easy. In the state of FIG. 6E, the second rotating mold 33 from which a multilayer molded product (not shown) is taken out is prepared for the next cycle, and the first rotating mold 32 is cooled and solidified. Assume that the completed primary compact is held.

  Next, as shown in FIG. 7A, the positioning mechanism 15 is released, the hydraulic pressure is applied to the head side of the first link 14, and the maximum length state of the first link 14 is maintained. Subsequently, the reverse rotation prevention mechanism 14a is operated to limit the sliding range around the first connecting portion 6a of the first link 14 so that the rotating mold part 30 rotates counterclockwise. Specifically, the first link 14 is pressed counterclockwise by a hydraulic cylinder or the like of the reverse rotation prevention mechanism 14a, and the opposing hydraulic cylinder or the like is hydraulically free and has no sliding range limitation. Let A black circle at the tip of the reverse rotation prevention mechanism 14a means that the reverse rotation prevention mechanism 14a is in operation. From this state, the mold closing operation of the movable platen 6 is started. In order to prevent the first link 14 and the like from being damaged, the mold closing speed and the mold closing force at the start of the mold closing operation are sufficiently small, and as shown in FIG. Needless to say, control is performed so that the mold closing speed and the mold closing force are gradually increased to the set values after the clockwise rotational operation is started and the rotational operation is confirmed by a sensor or the like. In addition, after confirming that the counterclockwise rotation operation of the rotating mold part 30 is confirmed, the pressing of the first link 14 by the reverse rotation prevention mechanism 14a is stopped, and the hydraulic pressure is made free to limit the sliding range. Return to the state.

  When the mold closing operation of the movable platen 6 is continued and the first guide block portion 13a reaches the parallel linear locus 12c from the circular orbit 12b, the rotating die portion 30 is moved as shown in FIG. From this state, the position is further rotated 90 degrees counterclockwise, and the rotating mold portion 30 is rotated 180 degrees counterclockwise from the state shown in FIG. Before the rotating mold part 30 is rotated to this position, the mold closing speed of the movable platen is sufficiently decelerated or the mold closing operation is temporarily stopped, and the positioning mechanism 15 orthogonal to the mold opening / closing direction is operated to rotate the rotating mold part. Lock position 30. Subsequently, the hydraulic pressure on the head side of an actuator such as a hydraulic cylinder constituting the first link 14 is made free to be in a contractible state. When the mold closing speed of the movable platen 6 is gradually increased or the mold closing operation that has been temporarily stopped is started, the entire length of the first link 14 is contracted as shown in FIG. The movable mold 40 is closed with respect to the first rotating mold 32 of the rotating mold portion 30 whose position is locked. The positioning mechanism 15 is freed immediately before the movable mold 40 and the rotary mold 32 are closed or simultaneously with the mold closing.

  The mold closing operation of the movable platen 6 is continued, and the movable mold 40 and the rotary mold 32 are integrally closed. An actuator such as a hydraulic cylinder that constitutes the first link 14 so that the rotary mold portion 30 is not separated from the movable plate 6 immediately before the movable mold 40 and the rotary mold 32 are closed or simultaneously with the mold closing. When the hydraulic pressure on the rod side is raised, the rotary mold portion 30 does not bounce in the direction of the fixed platen 5 due to the impact of closing the die with the movable platen 6, but is closed as a single unit, and thus is parallel from the circular locus 12b. It is possible to smoothly guide to the straight locus 12c. Then, the mold closing operation of the movable platen 6 is continued, and the second rotating mold 33 and the fixed mold 20 are closed as shown in FIG. The hydraulic pressure on the rod side of the actuator such as a hydraulic cylinder constituting the first link 14 is made free immediately before the second rotating mold 33 and the stationary mold 20 are closed or simultaneously with the closing of the mold. It is possible to prevent the first link 14 from being damaged by the clamping performed.

  A mold formed by the newly assembled fixed mold 20 and the second rotating mold 33 after applying a clamping force from the mold opening and closing device 7 (not shown) from the mold closed state shown in FIG. The cavity is injected and filled to form a primary molded body, and injected into a mold cavity formed by the movable mold 40, the first rotating mold 32, and the primary molded body held by the first rotating mold 32. A multi-layer resin molded article in which the secondary molded body is laminated and molded in at least one part of the primary molded body is filled. In this way, the rotating mold portion 30 is guided by the guide locus 12a of the slide guide portion 12 by the mold opening / closing operation of the movable platen 6, and the movement operation in the mold opening / closing direction and the counterclockwise and clockwise rotation operations are alternately performed. Repeatedly, a multilayer molded article can be formed continuously. In addition to the general multi-layer molding, if the integrated operation of the rotary mold part 30 and the movable plate 6 by the first link 14 is utilized, the toggle type mold in which the mold opening / closing device has excellent mold opening position control accuracy. In the case of an opening / closing device, the amount of mold opening between the fixed mold 20 and the rotating mold part 30 can be controlled with high accuracy, and an expansion foam molding method, an injection press molding method, or an injection compression molding method can be used between these molds. It can also be done.

  As described above, the rotary mold support device 10 according to the present invention includes the slide guide unit 12 having the guide locus 12a, the rotary mold support unit 11 guided by the slide guide unit 12, and the rotary mold support unit 11. The mold opening / closing operation and the rotation operation of the rotary mold part 30 can be performed with a small number of member configurations, ie, the first link 14 for connecting the movable platen 6 and the movable platen 6. When diverting to a molding injection molding machine, additional modifications to the injection molding machine can be reduced. Also, the mold opening / closing device of the injection molding machine is dismantled from a form in which the tie bar of the injection molding machine is not used, such as passing the tie bar through related parts, for guiding the movement operation of the rotating mold part 30 in the mold opening / closing direction. There is no need, and the first guide block portion 13a (second guide block portion 13b), the first guide block portion 13a, and the movable plate 6 guided by the slide guide portion 12 from the guide slide guide hand portion 12 are not necessary. Since the first link 14 to be connected and the rotating mold support 11 attached on both guide blocks can be attached as separate parts in almost this order, retrofitting of these members is easy. This is very advantageous in facilitating additional modifications of the injection molding machine.

  Further, the rotary mold support device 10 according to the present invention is basically disposed in the machine base portion 8 of the injection molding machine, and the rotary mold portion 30 is detachably attached on the rotary mold support portion 10. Therefore, the rotating mold part 30 and the mechanism for performing the mold opening / closing operation and the rotating operation are completely independent, and all of these mechanisms are arranged below the rotating mold part 30, so that they are fixed. Since the mold 20, the rotating mold part 30, and the movable mold 40 can be attached to and detached from the mold opening / closing device from above the injection molding machine as a set of molds, it is easy to exchange the molds. Further, it goes without saying that there are no elements that obstruct the attachment / detachment of the mold and access to the mold from both side surfaces with respect to the longitudinal direction of the injection molding machine.

  A second embodiment of the present invention will be described with reference to FIGS. 8 and 9 are operation explanatory views of the rotary mold support device according to the second embodiment of the present invention. The specific difference between the second embodiment and the first embodiment is the form of the first link, which is configured by an actuator such as a hydraulic cylinder of the first embodiment and is changed to the first link 14 that can be expanded and contracted. The link member 141 having one link node 143 and the link member 142 are configured, and the connection distance expansion / contraction mechanism is configured to arbitrarily hold and release the bending angle of the link member 141 and the link member 142 in the link node 143. The first link 140 is employed. Since the configuration of the other rotating mold support device and the multilayer molding method are basically the same as those in the first embodiment, the same constituent elements are denoted by the same reference numerals in FIGS. 8 and 9 and different from the first embodiment. Only explained.

  As shown in FIG. 8A, in a state where mold opening is started, the first link 140 including the link member 141 having one link node 143 and the link member 142 is one end of the link member 141. Is rotatably connected to the first connecting portion 6a below the movable platen 6, and one end of the link member 142 is rotatably connected to the first guide block portion 13a. The other end of each link member is flexibly connected by a link node 143 having a connecting distance expansion / contraction function. In this state, the connection of each link member in the link node 143 is in an open state.

  When the mold opening operation of the movable platen 6 is started by the mold opening / closing device 7 (not shown), the movable mold 40 is rotated for the second time until the bending angle of the first link 140 at the link node 143 is 180 degrees, that is, a straight line. The mold is opened from the mold 33. When the mold opening operation is continued and the first link 140 is extended until it is in a straight line, as shown in FIG. 8B, the first link 140 is guided to the parallel straight line locus 12c while being in a straight line state, The mold opening operation of the rotating mold part 30 is started, and the first rotating mold 32 is opened from the fixed mold 20.

  The mold opening operation of the movable platen 6 is continued, and when the first guide block 13a reaches the circular locus 12b from the parallel linear locus 12c as shown in FIG. 8C, as shown in FIG. 8D. The first guide block portion 13a is guided by the circular locus 12b, the second guide block portion 13b is also guided from the parallel linear locus 12c to the circular locus 12b, and the rotating mold portion 30 is counterclockwise around the center of the circular locus 12b. It is rotated.

  Further, when the mold opening operation of the movable platen 6 is continued and the first guide block portion 13a is guided to the intersection of the circular track 12b and the longitudinal center line of the injection molding machine, the maximum mold opening position is reached, and FIG. As shown in FIG. 8, the rotary mold 30 is rotated 90 degrees counterclockwise from the state shown in FIG. At this position, the mold opening of the movable platen 6 is stopped, and the positioning mechanism 15 in the mold opening / closing direction is operated to lock the position of the rotating mold part 30. Similarly to the first embodiment, in order to prevent the first link 140 and the like from being damaged, the mold opening speed is sufficiently reduced before the movable platen 6 reaches the maximum mold opening position, and the first link 140. Needless to say, consideration is given to a mechanism or the like that allows a predetermined amount of movement in the mold opening direction to the link member 141 or the link member 142 that constitutes the link member, or to the connecting portion of each link member.

  Next, as shown in FIG. 9A, the positioning mechanism 15 is released, and the connection of each link member in the link node 143 of the first link 140 is held (locked). Maintain state. The link node 143 in the figure shown by a black circle means that the connection of each link member of the link node 143 is maintained. Subsequently, the reverse rotation preventing mechanism 14a is operated, and the sliding range around the first connecting portion 6a of the first link 140 is limited so that the rotating mold part 30 rotates counterclockwise. The specific operation is the same as that of the first embodiment. In this state, the mold closing operation of the movable platen 6 is started, and the rotating mold part 30 is rotated counterclockwise as shown in FIG. 9B. After the start of the counterclockwise rotation operation of the rotating mold part 30 is confirmed by a sensor or the like (not shown), the pressing of the first link 140 by the reverse rotation prevention mechanism 14a is stopped and the hydraulic pressure is made free to slide. Return to the state without range restriction.

  When the mold closing operation of the movable platen 6 is continued and the first guide block portion 13a reaches the parallel linear locus 12c from the circular orbit 12b, the rotating die portion 30 is moved as shown in FIG. From this state, the position is further rotated 90 degrees counterclockwise, and the rotating mold part 30 is rotated 180 degrees counterclockwise from the state of FIG. 8C. Before the rotating mold part 30 is rotated to this position, the mold closing speed of the movable platen is sufficiently decelerated or the mold closing operation is temporarily stopped, and the positioning mechanism 15 orthogonal to the mold opening / closing direction is operated to rotate the rotating mold part. Lock position 30. Subsequently, the link member 143 of the link link 143 of the first link 140 being held is released, and the reverse rotation prevention mechanism is configured to bend the link node 143 toward the center line in the longitudinal direction of the injection molding machine. Actuate 14a. After it is confirmed that the link member is bent by a sensor or the like (not shown), the hydraulic pressure of the reverse rotation prevention mechanism 14a is made free to return to the state where the sliding range is not limited. When the mold closing speed of the movable platen 6 is gradually increased or is temporarily stopped, the first link 140 is bent while the first link 140 is bent as shown in FIG. The movable mold 40 is closed with respect to the first rotating mold 32 of the rotating mold portion 30 that is locked. The positioning mechanism 15 is freed immediately before the movable mold 40 and the rotary mold 32 are closed or simultaneously with the mold closing.

  The mold closing operation of the movable platen 6 is continued, and the movable mold 40 and the first rotating mold 32 are integrally closed. Each of the link nodes 143 of the first link 140 so that the rotary mold portion 30 is not separated from the movable plate 6 immediately before the movable mold 40 and the first rotary mold 32 are closed or simultaneously with the mold closing. When the link member is held connected, the rotating mold part 30 does not bounce in the direction of the stationary platen 5 due to the impact of closing the mold with the movable platen 6, but is closed as a single unit. It is possible to smoothly guide to the parallel linear locus 12c. Then, the mold closing operation of the movable platen 6 is continued as it is, and the second rotary mold 33 and the fixed mold 20 are closed as shown in FIG. By holding the connection of each link member of the link node 143 of the first link 140 free immediately before the second rotary mold 33 and the fixed mold 20 are closed or simultaneously with the mold closing, it is continued. It is possible to prevent the link node 143 from being damaged due to the clamping performed.

  A mold formed by the newly assembled fixed mold 20 and second rotating mold 33 after applying a clamping force from a mold opening / closing device 7 (not shown) from the mold closed state shown in FIG. The cavity is injected and filled to form a primary molded body, and injected into a mold cavity formed by the movable mold 40, the first rotating mold 32, and the primary molded body held by the first rotating mold 32. A multi-layer resin molded article in which the secondary molded body is laminated and molded in at least one part of the primary molded body is filled. In this way, the rotating mold part 30 is guided to the slide guide part 12 by the mold opening / closing operation of the movable platen, and the counterclockwise rotation and the clockwise rotation are alternately repeated to continuously form a multilayer molded product.

  A third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a schematic plan view of a rotary mold support apparatus according to Embodiment 3 of the present invention. FIG. 11 is an explanatory view of the operation of the rotary mold support device according to Embodiment 3 of the present invention. The specific difference between Example 1 and Example 2 in Example 3 is also the form of the first link, which is a straight line connecting the first connecting portion 6a of the movable platen 6 and the first guide block portion 13a. Two links arranged symmetrically with respect to each other, the link 241 and the link 242, and the first connecting portion 6 a and the first guide block portion 13 a are rotatably arranged around the respective connecting portions, and the links 241 and 242 A first link 240 composed of two connection members, a connection member 245 and a connection member 246, which are rotatably connected at positions where both ends are spaced equidistant from the respective connecting portions, is employed. The first link 240 can also function as a reverse rotation prevention mechanism by arbitrarily expanding and contracting the link 241 and the link 242 independently. Other configurations of the rotating mold support device and the multilayer molding method are basically the same as those in the first and second embodiments. Therefore, in FIG. 10 and FIG. Only the function as the reverse rotation prevention mechanism that is different from the second embodiment will be described.

  FIG. 10 shows a state where the movable platen 6 reaches the maximum mold opening position and the mold opening operation is completed. In the first embodiment, the state corresponds to FIG. 6 (e), and in the second embodiment, the state corresponds to FIG. 8 (e). The movable platen 6 is stopped, and the rotating mold part 30 is locked by the positioning mechanism 15 at a position where the mold dividing surfaces of the first rotating mold 32 and the second rotating mold 33 are parallel to the mold opening / closing direction. Has been. The link 241 and the link 242 of the first link 240 are composed of actuators of the same specification such as a hydraulic cylinder and can be expanded and contracted. Both the link 241 and the link 242 are rotatably connected to a connecting member 245 whose head side is rotatably arranged around the first connecting portion 6a at a position spaced equidistant from the first connecting portion 6a, and the rod side is first. The connecting member 246 that is rotatably arranged around the guide block portion 13a is rotatably connected at a position spaced apart from the first guide block portion 13a by an equal distance. In the maximum mold opening position shown in FIG. 10, the link 241 and the link 242 are in a maximum length state in which both the head side and the rod side are hydraulic-free and retractable, and the reverse rotation prevention mechanism 14a as in the first and second embodiments. Is not equipped. In order to simplify the drawing, the link 241 and the link 242 are both parallel to the straight line connecting the first connecting portion 6a and the first guide block portion 13a, that is, the first connecting portion 6a and the first guide block. The distance between both ends of the link from the portion 13a is the same distance, but the arrangement of the links is not limited to this, and the first connecting portion 6a and the first guide block portion 13a What is necessary is just to be arrange | positioned symmetrically with respect to the straight line which connects.

  Next, the reverse rotation prevention mechanism of the first link 240 will be described with reference to FIG. The hydraulic pressure is raised from the state of FIG. 10 to the head side of the link 241 in the maximum length state, and the maximum length state of the link 241 is maintained. On the other hand, it is assumed that the link 242 remains in the maximum length state that can be contracted freely and hydraulically on both the head side and the rod side, and the position of the rotary mold portion 30 is locked by the positioning mechanism 15. From this state, as shown in FIG. 11A, the mold closing operation of the movable platen 6 is started by a mold opening / closing device (not shown).

  When the mold closing operation is started, the first connecting portion 6a is moved to the first guide block portion 13a side which is locked and not moved. However, since the link 241 is maintained in the maximum length state, the movement amount of the first connecting portion 6a is rotated around the connecting portions of the connecting member 245 and the connecting member 246 as shown in FIG. Is absorbed by contracting the link 242. After the connecting member 245 and the connecting member 246 are rotated by a predetermined angle, the lock of the positioning mechanism 15 of the rotary mold part 30 is released, and the same hydraulic pressure as that of the head of the link 241 is set on the head side of the link 242. Stop contraction.

  FIG. 11C shows a vector applied to each connecting portion of the first link 240, where θ is a predetermined angle of the connecting member 245 and the connecting member 246 in FIG. It is. Since both the link 241 and the link 242 have the same hydraulic pressure on the head side, the connecting member 245 and the connecting member 246 do not rotate, and the connecting portion of the connecting member 246 to which the rod side of both links is connected opens and closes the mold. The same vector a and vector b occur in the direction. The decomposition vectors in the longitudinal direction of the connecting member 246 of the vector a and the vector b become the vector a ′ and the vector b ′. That is, a combined vector a ′ + b ′ that is the sum of these decomposition vectors is generated in the longitudinal direction of the connection member 246 in the first guide block portion 13 a that is a connection portion of the connection member 246. Here, since the first guide block portion 13a is guided by the circular locus 12b, the first guide block portion 13a has a decomposition vector (a ′ + b ′) of the combined vector a ′ + b ′ in the tangential direction of the circular locus 12b. Cos θ acts and the rotating mold part 30 can be reliably rotated clockwise. Similarly, if the maximum length state of the link 242 is maintained, a vector for rotating the rotary mold portion 30 counterclockwise can be obtained. With respect to the predetermined angle θ, the mechanical portion related to the first link 240 is damaged during the rotation operation of the rotary mold 30 depending on the size, weight, etc. of the injection molding machine, the mold opening / closing device, or the mold used. The angle that can be reliably rotated in any rotation direction may be selected as appropriate.

  The same hydraulic pressure is applied to the heads of the link 241 and the link 242 as they are, and the rotating mold part 30 is rotated clockwise while maintaining the respective link lengths. After the rotating mold part 30 is further rotated 90 degrees from the state shown in FIG. 10, the positioning means 15 is operated to lock the position of the rotating mold part 30 and the link 241 as shown in FIG. If only the head side hydraulic pressure is made free and contractible, the connection member 245 and the connection member 246 are rotated, the link 242 with the hydraulic pressure standing on the head side is extended, and the link 241 is contracted.

  11D, when the link 241 and the link 242 become the same length as shown in FIG. 11E, the hydraulic pressure on the head side of the link 242 is made free, and the link 241 and the link 242 The head side and the rod side are free of hydraulic pressure and can be expanded and contracted. In order to reliably stop the operation of the link 242 in the extending direction, the same hydraulic pressure may be applied to the rod side of both links. Further, in the process of matching the lengths of both links shown in FIGS. 11 (d) to 11 (e), the mold closing speed is preferably lowered sufficiently.

  Although illustration is omitted, if the mold closing operation is continued from the state of FIG. 11 (e), both links are evenly contracted while maintaining the rectangle formed by both links and both connecting members, and the first rotating metal The movable mold 40 is closed on the mold 32. Immediately before the movable mold 40 and the first rotary mold 32 are closed, or when the positioning mechanism 15 is released simultaneously with the mold closing, the mold closing operation of the rotary mold portion 30 is started. The hydraulic pressure on the rod side of the link 241 and the link 242 of the first link 240 may be raised at the same timing as in the first embodiment, and the rotating mold part 30 and the movable platen 6 may be integrally closed. In this way, if the first link is composed of two links of the same specification that can be expanded and contracted, and the connecting parts that connect these links, the respective links can be expanded and contracted independently, thereby rotating in reverse. It can also function as a prevention mechanism.

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory view of the operation of the rotary mold support device according to the fourth embodiment of the present invention. A specific difference between the first embodiment, the second embodiment, and the third embodiment in the fourth embodiment is that, apart from the first link 14 that connects the movable plate 6 and the first guide block portion 13a, the fixed plate 5 The second link 18 that connects the second guide block portion 13b is employed.

  The second link 18 is arranged so as to be separated from the first link 14 of the rotating mold support 11 by the same distance as the diameter of the circular locus 12b, that is, a position symmetrical to the center of the circular locus. In order to connect the second guide block portion 13b and the non-movable fixed platen 5 to each other, the mold opening / closing operation of the rotary die support portion 11 on the parallel linear locus 12c is synchronized with the mold opening / closing speed of the movable platen 6. By extending / stretching the second link 18, a mold opening / closing force in the same direction as the mold opening / closing force by the first link 14 is applied to the second guide block portion 13 b not connected to the first link 14. . Further, during the rotation operation on the circular locus 12b, the second guide 18 that is not connected to the first link 14 is contracted and expanded in synchronization with the mold opening / closing operation of the movable platen 6. It is possible to apply the rotational force in the same rotational direction as that of the first link 14 to the block portion 13b to assist the mold opening / closing operation and the rotating operation of the rotating mold portion. Other configurations of the rotating mold support device and the multilayer molding method are basically the same as those in the first to third embodiments, and therefore the mold opening / closing of the rotating mold portion 30 which is different from the first to third embodiments. Only the function that assists the operation and rotation will be described. In order to simplify the explanation, the second link 18 is composed of an actuator such as a hydraulic cylinder like the first link 14 of the first embodiment, and can be expanded and contracted. ), (F), and (g) indicate the same state as that of the corresponding alphabet in FIG. 6 of the first embodiment, and the same constituent elements are denoted by the same reference numerals.

  FIG. 12A shows a state where the injection filling and the cooling and solidification of the resin molded product in the mold cavity are completed and the mold opening is started. In addition to the first link 14 of the first embodiment, the second guide block 13b and the second connecting portion 5a on the longitudinal center line of the injection molding machine below the fixed platen 5 are connected by the second link 18. ing. The second link 18 is also rotatably connected to the second connecting portion 5a whose head side is on the longitudinal center line of the injection molding machine at the lower part of the fixed platen 5, and the rod side to the second guide block portion 13b. The sliding range is arbitrarily limited by a reverse rotation prevention mechanism 18a composed of a hydraulic cylinder or the like disposed at the lower part of the fixed platen 5. The second link 18 is also hydraulically free and expandable on both the head side and the rod side, and the reverse rotation prevention mechanism 18a is also hydraulically free and has no sliding range limitation.

  When the mold opening operation of the movable platen 6 is started by the mold opening / closing device 7 (not shown) and subsequently the mold opening operation of the rotating mold part 30 is started as shown in FIG. 12B, the second link 18 is started. The first rotating mold 32 of the rotating mold part 30 is opened from the fixed mold 20 until the maximum length is extended. At this time, hydraulic pressure is applied to the head side of the second link 18, and the entire length of the second link is extended in synchronism with the mold opening speed of the rotary mold part 30, whereby the second guide block part 13b is also molded. An opening force can be applied to assist the mold opening operation in the parallel linear trajectory 12c of the rotating mold part 30, and in a state in which a balance is maintained as compared with the mold opening operation of only the first link 14. The mold opening operation of the rotating mold part 30 can be performed.

  Next, as shown in FIG. 12C, after the first guide block portion 13a reaches the intersection (contact point) between the circular locus 12b and the parallel linear locus 12c, the first guide block portion 13a reaches the maximum length. As described above, the counterclockwise rotational force is applied by the extended first link 14. Here, if the second link 18 selects the stroke so as to have the maximum length when the second guide block portion 13b reaches the intersection (contact point) between the circular locus 12b and the parallel linear locus 12c, The hydraulic pressure is applied to the rod side of the second link 18 in synchronization with the timing at which the counterclockwise rotational force is applied to the guide block portion 13a, and the entire length of the second link is synchronized with the rotational speed of the rotary mold portion 30. By contracting, the second guide block portion 13b can be imparted with a counterclockwise rotational force, and the rotational movement of the rotary mold portion 30 on the circular locus 12b can be assisted. Compared with the rotation operation, the rotation operation of the rotating mold part 30 can be performed in a state where the balance is maintained.

  Further, as shown in FIG. 12 (f), when the mold closing operation of the movable platen 6 is started from the maximum mold opening position, hydraulic pressure is applied to the head side of the first link 14 and the maximum length of the first link 14. It is first necessary to maintain the state and operate the reverse rotation prevention mechanism 14a to limit the sliding range around the first connecting portion 6a of the first link 14 so that the rotating mold part 30 rotates counterclockwise. As described in the above. By causing the second link 18 to perform the same operation as the first link 14, the second guide block portion 13 b is also given a counterclockwise rotational force, and the circular locus 12 b of the rotating mold portion 30 Rotational motion can be assisted.

  Further, as described above, as shown in FIG. 12G, the counterclockwise rotational force is applied to the first guide block portion 13a by the first link 14 that maintains the maximum length state. It is. Here, after it is confirmed by a sensor or the like that the rotational mold portion 30 starts to rotate counterclockwise from the state of FIG. 10 (f), hydraulic pressure is applied to the head side of the second link 18 to rotate the rotational mold portion. By extending the entire length of the second link in synchronism with the rotational speed of 30, a counterclockwise rotational force is also applied to the second guide block part 13 b, and the rotational movement of the rotary mold part 30 on the circular locus 12 b As compared with the rotation operation of only the first link 14, the rotation operation of the rotary mold part 30 can be performed in a state where the balance is maintained.

  In this way, by adopting the second link 18 in addition to the first link 14, the mold opening / closing operation and the rotation operation of the rotating mold part 30 can be assisted, and these operations can be supported by the first link 14. Compared with the case where it carries out only by, it can be made to carry out in the state where the balance was maintained more. In the fourth embodiment, in order to simplify the description, the second link is configured by an actuator such as a hydraulic cylinder similar to the first link 14 described in the first embodiment and is extendable and retractable. A link similar to the first link of Example 2 or Example 3 may be employed. Further, the first link and the second link do not necessarily have the same structure.

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, in the first embodiment, the first link 14 is rotatable on the head side on the first connecting portion 6a on the longitudinal center line of the injection molding machine below the movable platen 6, and on the rod side with the first guide block portion 13a. Although they are connected, the connection between the head side and the rod side may be reversed. In the first embodiment, the second embodiment, and the fourth embodiment, the reverse rotation prevention mechanism is configured by a hydraulic cylinder or the like disposed below the fixed plate or the movable plate. If there is, it may be arranged in the slide guide part or the machine base part. As another form of the reverse rotation prevention mechanism, the first link and the second link can be rotated at a rotatable connecting portion (a connecting portion between the guide block portion, the movable platen and the fixed platen) or the link node of the second embodiment. A known mechanism that arbitrarily restricts the direction and the rotation angle may be used.

  With the rotating mold support device and multilayer molding method according to the present invention, when a single-layer molding injection molding machine is diverted to a multilayer molding injection molding machine, additional modifications to the injection molding machine can be minimized. Furthermore, as described above, it can be easily attached and detached from the mold opening and closing device as a set of molds. In particular, the fact that a general-purpose single-layer injection molding machine can be easily remodeled into a multilayer injection molding machine with a commercially available additional injection unit has the effect that it can be easily returned to the single-layer injection molding machine. In other words, it is not necessary to introduce an expensive injection molding machine dedicated to multilayer molding, and it is possible to use a single-layer injection molding device at a low cost for single-layer molding and multilayer molding according to demand. Industrial value is extremely high for manufacturers. In addition, when the rotary mold support device according to the present invention is used to convert an injection molding machine for single-layer molding into an injection molding machine for multilayer molding, additional modifications to the injection molding machine can be minimized. Even in the case of newly designing and manufacturing a multi-layer injection molding machine equipped with the rotary mold support device according to the present invention, there are few design changes from the general-purpose single-layer molding injection molding, and it is newly added. Since there are few members, the increase in these design and manufacturing costs can be suppressed. Therefore, the industrial utility value is extremely high not only for manufacturers of resin molded products but also manufacturers of injection molding machines.

DESCRIPTION OF SYMBOLS 1 Injection molding machine 5 Fixed board 5a 2nd connection part 6 Movable board 6a 1st connection part 12 Slide guide part 12a Guide locus 12b Circular locus 12c Parallel linear locus 13a 1st guide block part 13b 2nd guide block part 14 1st Link 14a Reverse rotation prevention mechanism
15 Positioning mechanism 18 Second link 18a Reverse rotation prevention mechanism 20 Fixed mold 30 Rotating mold part 40 Movable mold 140 First link 141 Link member 142 Link member 143 Link node 240 First link 241 Link 242 Link 245 Connection member 246 Connection member

Claims (8)

Identical with one circular trajectory arranged between the fixed platen and the movable platen, and a set of parallel linear trajectories parallel to the mold opening and closing direction in which each one end is connected so as to continuously contact the circular trajectory. A slide guide portion having a guide locus configured on a plane;
Two guide block portions guided by the guide locus of the slide guide portion;
The guide block portion is arranged so as to be separated by the same distance as the diameter of the circular locus, and is guided in parallel to the mold opening / closing direction in the parallel linear locus of the slide guide portion, and the circular locus in the circular locus A rotating mold support that is guided to rotate about a rotation axis passing through the center of
A first link having a connecting distance expansion / contraction function that connects one of the guide block portions and the movable platen and arbitrarily expands / contracts the distance between the respective connection portions;
A position at which the mold dividing surface of the rotating mold part disposed on the slide guide part and attached to the rotating mold support part is opposed to the mold dividing surface of the fixed mold and the movable mold; A positioning mechanism for positioning at a position rotated approximately 90 degrees;
A rotating mold support device comprising:   The reverse rotation prevention mechanism which restrict | limits the sliding range of a said 1st link arbitrarily so that the said rotation metal mold | die support part may be rotated to arbitrary directions in the said circular locus | trajectory is characterized by the above-mentioned. Rotating mold support device.   The first link is composed of at least two link members having at least one link node, and the connection distance expansion / contraction function arbitrarily holds and releases the bending angle of the two link members in the link node. It is comprised, The rotary die support apparatus of any one of Claim 1 to 2 characterized by the above-mentioned.   The first link is arranged symmetrically with respect to a straight line connecting the connecting portions, and the first link is rotatably arranged around the connecting portion, and both ends of the two links are connected to the connecting portion. And two connection members that are rotatably connected at a position spaced equidistant from each other, and the reverse rotation prevention mechanism is configured to arbitrarily extend and contract the two links arbitrarily. The rotary mold support apparatus according to any one of claims 1 to 3.   2. The second link having a connecting distance expansion / contraction function for connecting the other of the guide block part and the fixed plate and expanding / contracting the distance between the connection parts arbitrarily. The rotating mold support device according to any one of claims 1 to 4.   An injection molding machine comprising the rotary mold support device according to any one of claims 1 to 5. A fixed die attached to the fixed platen, a movable die attached to the movable platen, and a die cavity attached to the rotating die support portion and combined with the fixed die and the movable die. And a rotary mold part having two mold dividing surfaces formed thereon is clamped to either one of the fixed mold and the movable mold, and one mold of the rotary mold part A primary molding step of molding a primary molded body by injection filling a mold cavity formed between the mold dividing surfaces;
The movable platen is opened in a state where the primary molded body is held by the rotating mold part, and the rotating mold part is opened from the fixed mold by the first link, and the rotation is performed. A mold opening step of rotating the mold parting surface of the mold part until it is substantially parallel to the mold opening and closing direction;
The movable platen is closed, and the first mold and the reverse rotation prevention mechanism are used to rotate the two mold dividing surfaces of the rotating mold part to a position facing a mold different from the primary molding process. And a mold closing step of closing the movable mold to the rotary mold part after the rotary mold part is closed to the fixed mold, and
The primary molded body held by the rotating mold part by clamping the fixed mold, the movable mold, and the rotating mold part, and the other of the fixed mold and the movable mold A secondary molding step of injection-filling a mold cavity formed by a mold and laminating a secondary molded body on at least a portion of the primary molded body;
A multilayer molding method using the injection molding machine according to claim 6.   The multilayer molding method according to claim 7, wherein the second link assists at least one of a mold opening / closing operation and a rotation operation of the rotating mold part.

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