Product manufacturing method and manufacturing apparatus

Abstract

Provided are an article manufacturing method and manufacturing apparatus capable of supporting a complex molding process in molding using a hot runner having a valved system, the method comprising closing a first mold onto a second mold, injecting molten resin from at least one injection unit provided on the first mold into a first mold insert of the first mold to mold a first molded product; opening the first mold and the second mold to separate the first plate including the first mold insert from the first mold; moving the first mold insert to a position where the first molded product and a second molded product at the second mold face each other; and joining the first molded product with the second molded product.

Description

Technical Field

[0001] The present disclosure relates to a method and an apparatus for manufacturing an article. Background Art

[0002] Japanese Patent Laid-Open No. S62-087315 discloses a method in which a mold insert including one of two molded products molded by primary molding is slid by a drive unit so that the two molded articles molded by primary molding face each other, and secondary molding is performed after the mold is re-closed. The method of the disclosure of Japanese Patent Laid-Open No. S62-087315 is a method of an injection unit using a cold runner, and in the method of an injection unit using a cooling channel, scraps such as sprues or runners are generated. In addition, gate cutting during the molding process extends the molding cycle time, and thus productivity may be reduced.

[0003] For these reasons, in recent years, a hot runner, which is a runnerless molding system, has generally been used to meet the demand for reducing scraps (i.e., environmental friendliness) and alleviating the reduction in productivity. The hot runner has two types of gate systems: one is an open gate system in which the gate for supplying the molten resin is always open; the other is a valve gate system in which the gate is open before injection and closed after injection. In recent years, in order to obtain a stable product weight, a clean finished product appearance, etc., the valve gate system is generally adopted to prevent the molten resin from dripping and drawing.

[0004] In order to adopt a hot runner and perform complex joining in a mold, it is also necessary to slide a mold insert in a mold provided with an injection unit. However, in a mold provided with an injection unit adopting a valve gate system, a gate closing valve interferes with the mold insert and hinders the free sliding of the mold insert. Therefore, the conventional method cannot support a complex molding process. Summary of the Invention

[0005] Accordingly, the present disclosure provides a method and an apparatus for manufacturing an article, which can support a complex molding process in performing molding using a hot runner having a valve gate system.

[0006] To this end, an aspect of the present disclosure provides a method for manufacturing an article, which includes closing a first mold onto a second mold, injecting molten resin from at least one injection unit provided on the first mold into a first mold insert of the first mold to mold a first molded product; opening the first mold and the second mold to separate a first plate including the first mold insert from the first mold; moving the first mold insert to a position where the first molded product and a second molded product at the second mold face each other; and joining the first molded product and the second molded product.

[0007] The present disclosure can provide a method and a manufacturing apparatus for manufacturing an article, which can support complex molding in molding performed using a hot runner having a valve gate system.

[0008] The features of the present disclosure will become clear from the following description of exemplary embodiments with reference to the drawings. Description of the Drawings

[0009] Figure 1A 、 Figure 1B and 1C are diagrams showing steps of joining molded products with molten resin;

[0010] Figure 2A 、 Figure 2B 、 Figure 2C and Figure 2D are diagrams showing conventional molding steps in which a mold insert slides on a mold;

[0011] Figure 3A 、 Figure 3B 、 Figure 3C 、 Figure 3D and Figure 3E are diagrams showing a molding process in an injection molding apparatus;

[0012] Figure 4A 、 Figure 4B 、 Figure 4C 、 Figure 4D and Figure 4E are diagrams showing a molding process in a modified injection molding apparatus;

[0013] Figure 5A and Figure 5B are cross-sectional views showing an injection unit and a partial mold insert;

[0014] Figure 6A 、 Figure 6B 、 Figure 6C 、 Figure 6D and Figure 6E are diagrams showing a molding process in an injection molding apparatus;

[0015] Figure 7Aand Figure 7B is Figure 6C and Figure 6D a close-up view;

[0016] Figure 8 is an overall view showing an inkjet printer;

[0017] Figure 9A 、 Figure 9B and Figure 9C are diagrams showing a liquid storage container;

[0018] Figure 10A 、 Figure 10B and Figure 10C are diagrams showing a method for manufacturing a connecting member;

[0019] Figure 11A and Figure 11B are cross-sectional views showing a first molded product, a second molded product, and a third molded product; and

[0020] Figure 12A 、 Figure 12B 、 Figure 12C 、 Figure 12D and Figure 12E are diagrams showing other embodiments. Detailed Description of the Embodiment

[0021] The first embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0022] Figures 1A to 1C is a diagram showing typical steps of joining molded products together with molten resin. As Figure 1A shown, the first molded product 1 and the second molded product 2 molded by primary molding face each other. As Figure 1B shown, the first molded product 1 and the second molded product 2 are closed together and assembled to form an internal space 3. Then, as Figure 1C shown, in secondary molding, molten resin 4 is injected into the internal space 3 to join the first molded product 1 and the second molded product 2 together.

[0023] Figures 2A to 2D is a diagram showing a conventional structure. Figures 2A to 2D shows the steps of molding using a first mold 24 including an injection unit and a second mold 25 not including an injection unit, where a mold insert can slide on the second mold. As Figure 2A shown, in primary molding, the first molded product 21 and the second molded product 22 are molded by injecting molten resin from the injection unit 20. In Figure 2B and 2CIn this case, the first mold 24 and the second mold 25 are opened, and the mold insert 27 of the second mold 25 that contains the second molded product 22 slides to a position facing the mold insert 26 that contains the first molded product 21. In Figure 2D In this case, the first mold 24 and the second mold 25 are closed, and as a secondary molding, molten resin is injected from the injection unit 23, thereby joining the first molded product 21 and the second molded product 22 together.

[0024] However, in this conventional configuration, the mold insert 26 of the first mold 24 provided with the injection units 20 and 23 is connected in valve pairing with the injection units 20 and 23. Due to the interference of the valves, the mold insert 26 cannot slide and move. Therefore, the conventional method may not be able to support complex molding processes. The method of the present embodiment described below can move the mold insert 26 of the first mold 24 provided with the injection units 20 and 23, thereby supporting complex molding processes.

[0025] Figures 3A to 3E FIG. is a diagram showing the molding process in the injection molding apparatus 38 of the present embodiment. The steps of the molding process of the present embodiment will be described one by one below. For clarity, the driving device for moving the mold is not described again. The injection molding apparatus 38 of the present embodiment includes a plate 31 located between the first mold 34 and the second mold 35, and the plate 31 has a mold insert 37.

[0026] Figure 3A The first mold 34 and the second mold 35 in the open state are shown. Figure 3B The first mold 34 and the second mold 35 in the closed state are shown. Closing the first mold 34 and the second mold 35 causes the mold insert 37 on the plate 31 and the valve of the injection unit 30 provided on the first mold 34 to be connected in valve pairing with each other, thereby creating a moldable state. In the closed state, molten resin is injected from the injection unit 30, and the first molded product 1 and the second molded product 2 are molded as a primary molding. As Figure 3C shown, after the primary molding, the first mold 34 and the second mold 35 are opened. When the first mold 34 and the second mold 35 are opened, as Figure 3C shown, due to the force (action) of the elastic member 32, the plate 31 moves in a direction away from the first mold 34, thereby disconnecting the valve of the injection unit 30 from the mold insert 37.

[0027] In the configuration in which the plate 31 is moved away from or detached from the first mold 34 due to the force of the elastic member 32 when the mold is opened, the mold insert 37 is separated from the injection unit 30 when the mold is opened, thereby eliminating the need for a drive source. The plate 31 includes a mechanism (moving unit) for sliding the mold insert 37, and thus is able to slide the mold insert 37. The drive for moving the plate 31 away from the first mold 34 may include, for example, an air cylinder, an electric cylinder, a hydraulic unit, and the like, and the drive selected may be based on considerations such as responsiveness to the mold opening / closing operation, the size of the molded product, and the mold configuration.

[0028] like Figure 3D As shown, the mold insert 37 including the first molded product 1 slides and moves to a position opposite to the second molded product 2. The mold insert 37 can slide along a guide provided on the plate 31, for example, using a cylinder or the like. In addition, while the mold insert 37 is moved, triple molding, quadruple molding, etc. can also be performed. In this case, the mold insert 37 can be operated using, for example, a servomotor capable of changing the sliding position of the mold insert 37 to any given position. The method for moving the mold insert 37 is not limited to sliding the mold insert 37, and may also include rotating the plate 31. In the case of moving the mold insert 37 by rotation, the plate 31 can be operated using, for example, a servomotor capable of changing the rotation position to any given position or a structure combining a rack and pinion and a cylinder, etc.

[0029] like Figure 3E As shown, the first mold 34 and the second mold 35 are closed. The closed mold clamps the plate 31 between the first mold 34 and the second mold 35, and the mold insert 37 is connected to the valve of the injection unit 33. The closed mold also assembles the first molded product 1 in the mold insert 37 with the second molded product 2. The first molded product 1 and the second molded product 2 are joined together by injecting molten resin from the injection unit 33 for secondary molding.

[0030] The present embodiment in which the mold insert slides in the mold provided with the injection unit is suitable for the case where the molded product is small. Considering the unit pitch between the injection units for molding small products, the injection unit 20 and the injection unit 23 cannot be arranged side by side in a single mold insert (see Figure 2A In contrast, in the present embodiment in which the mold insert slides in a mold provided with an injection unit, the injection units can be arranged away from each other, so that small products can also be molded.

[0031] In a conventional molding process using a first mold and a second mold both without a sliding mechanism, a first molded product and a second molded product are molded in a primary molding. The second molded product is removed from the mold insert and attached to a position facing the first molded product to perform a secondary molding. In this conventional method, when the second molded product is removed from the mold insert after the primary molding, it is necessary to eject and remove the second molded product with an ejector pin or the like. However, the ejector pin or the like leaves an ejection mark on the second molded product.

[0032] In contrast, in the present embodiment, the secondary molding can be performed after the first molded product and the second molded product are faced to each other without removing any molded product formed by the primary molding. Therefore, no ejection mark is left on the molded product.

[0033] In addition, when using Figures 2A to 2D the conventional configuration described, the secondary molding can be performed without removing any molded product formed by the primary molding. However, in order to remove the whole molded product joined together by the secondary molding, it is necessary to eject and remove the molded product remaining in the second mold 25 (see Figure 2A ), and the ejector pin or the like leaves an ejection mark on the molded product.

[0034] In contrast, in the present embodiment, when removing the whole molded product from the mold insert 37 on the plate 31 away from the first mold 34 after the secondary molding (see Figure 3A ), the molded product is not ejected but removed by using a robot or the like, and this removal does not leave an ejection mark on the molded product.

[0035] Figures 4A to 4E is a diagram showing a molding process in an injection molding apparatus 48 which is a modification of the present embodiment. The steps of the molding method of the modification of the present invention are described below. Figures 4A to 4E The configuration of the mold in the injection molding apparatus 48 is described in

[0036] For the sake of clarity, the driving device for moving the mold is not described again. In addition to having the configuration of the above embodiment, the modification of the present invention is configured such that the mold insert in the second mold is also movable. Figure 4A As shown, as referred to Figures 3A to 3EAs described above, even though the first mold 44 is provided with injection units 40 and 43, since the plate 41 is separated from the first mold 44, the mold insert 47 can also move while maintaining a distance from the injection units 40 and 43. In addition, since the second mold 45 is not provided with any injection units, the mold insert 49 of the second mold 45 can also move.

[0037] As Figure 4B shown, as the first mold 44 and the second mold 45 are closed, primary molding is performed to mold the first molded product 1 and the second molded product 2. For the mold insert 47 and the mold insert 49, primary molding is performed using the injection unit 43 provided in the first mold 44. After the primary molding, as Figure 4C shown, the first mold 44 and the second mold 45 are opened. After opening the molds, the plate 41 is separated from the first mold 44. In this state, the mold insert 47 of the first mold 44 and the mold insert 49 of the second mold 45 move (slide) to positions corresponding to the injection unit 40 for secondary molding. Since the plate 41 is separated from the first mold 44, the mold insert 47 of the first mold 44 can move. Figure 4D shows a state in which the mold insert 47 of the first mold 44 and the mold insert 49 of the second mold 45 have completed moving. In Figure 4D this state, the mold insert 47 of the first mold 44 and the mold insert 49 of the second mold 45 face each other. In this state, the first mold 44 and the second mold 45 are closed, and as Figure 4E shown, secondary molding is performed using the injection unit 40 to join the first molded product 1 and the second molded product 2 together. The method for moving the mold insert 47 is not limited to sliding the mold insert 47, and the plate 41 can also be rotated. For rotation, for example, a servo motor or a configuration of a rack and pinion and a cylinder that can change the rotation position to any given position can be used to operate the plate 41.

[0038] In this way, the mold insert 47 of the first mold 44 provided with the injection units 40 and 43 is configured to be movable. Thus, the provided article manufacturing method and manufacturing apparatus can support complex molding processes in molding using a hot runner having a valve gate system.

[0039] The second embodiment of the present disclosure will be described below with reference to the drawings. This embodiment has the same basic configuration as the first embodiment, and only the characteristic configuration of this embodiment will be described below. For clarity, similar configurations are incorporated by reference to avoid unnecessary repetition.

[0040] Figure 5A And 5B are diagrams showing the injection unit 40 in the first embodiment ( Figure 4ACross-sectional view of a part of the mold insert 47 assembled together. Figure 5A Shows the state in which the injection unit 40 and the mold insert 47 are assembled together. Figure 5B Shows the state in which the injection unit 40 and the mold insert 47 are separated from each other. The description of the injection unit 40 and the mold insert 47 applies to the injection unit 40 and the mold insert 49.

[0041] The mold insert 47 has a pin hole 50, and a pin 51 at the tip of the injection unit 40 is inserted into the pin hole 50. The gap between the assembled pin hole 50 and the pin 51 is narrow to reduce the amount of molten resin injected from the injection unit 40 entering the gap. Therefore, in combination with the structure in the first embodiment, when the first mold 44 and the second mold 45 are opened and closed, the process of the pin 51 being inserted into the pin hole 50 and the pin 51 being removed from the pin hole 50 is repeated, which causes wear of the pin 51. Therefore, this embodiment has a structure for reducing the wear of the pin 51 caused when the first mold 44 and the second mold 45 are closed and opened. The structure for reducing the wear of the pin 51 is described below.

[0042] Figures 6A to 6E Is a diagram showing the molding process in the injection molding device 68 of this embodiment. The steps of the molding process of this embodiment are described below. Using Figures 6A to 6E The structure of the mold in the injection molding device 68 has been described, and for the sake of clarity, the driving device for moving the mold will not be described again.

[0043] In the injection molding device 68 of this embodiment, the mold insert is divided into a mold insert 67 for accommodating the molded product, a mold insert 691 (first separated mold insert) against the injection unit 60 (injection unit A), and a mold insert 692 (second separated mold insert) against the injection unit 63 (injection unit B). The mold insert 691 covers the injection end of the injection unit 60, and the mold insert 692 covers the injection end of the injection unit 63. In this way, the mold insert is divided into a mold insert 67 for accommodating the molded product, a mold insert 691 against the injection unit 60, and a mold insert 692 against the injection unit 63. Then, when the first mold 64 and the second mold 65 are opened and closed, insertion and removal are not performed between the mold insert and the injection unit, but insertion and removal are performed between the mold inserts. This reduces the wear of the pin 51.

[0044] When the first mold 64 and the second mold 65 change from the open state as Figure 6A shown to the closed state as Figure 6BIn the closed state shown, the mold inserts 67 and 691 are assembled together. Since the injection unit 60 abuts against the mold insert 691, the injection unit 60 can inject into the mold insert 67. Accordingly, primary molding is performed to form the first molded product 1 at the first mold 64 and the second molded product 2 at the second mold 65. Then, the first mold 64 and the second mold 65 are opened, as Figure 6C shown, the first mold 64 and the plate 61 move away from each other, so that the mold insert 67 moves away from the mold insert 691.

[0045] As Figure 6D shown, the sliding mold insert 67 is moved such that the mold insert 67 containing the first molded product 1 moves to a position facing the second molded product 2. Then, as Figure 6E shown, the first mold 64 and the second mold 65 are closed. Closing the molds places the plate 61 in a state of being sandwiched between the first mold 64 and the second mold 65, and the mold inserts 67 and 692 are paired and connected. Closing the molds also causes the first molded product 1 and the second molded product 2 in the mold insert 67 to be assembled together. Secondary molding is performed by injecting molten resin from the injection unit 63 to join the first molded product 1 and the second molded product 2 together.

[0046] Figure 7A and 7B are Figure 6C and 6D close-up views of. For clarity, Figure 7A and 7B the plate 61 is omitted, so that the state of the mold insert 67 can be more easily understood. The mold inserts of the mold having the injection units 60, 63 are divided into the mold insert 67 and the mold insert 691, and the mold insert 67 and the mold insert 691 are inserted and separated by precise positioning of the mold. Similarly, for the mold insert 692, the mold insert 67 and the mold insert 692 are inserted and separated by precise positioning of the mold.

[0047] The second mold 65 includes a flow channel forming member 70, and in primary molding, the flow channel forming member 70 forms a flow channel 71 for secondary molding inside the first molded product 1. In secondary molding, molten resin is injected from the injection unit 63 into the flow channel 71 to join the first molded product 1 and the second molded product 2 together.

[0048] After the mold insert 67 moves to a position facing the mold insert 692 (where secondary molding is performed), the flow channel 71 serves as a gate for the injection unit 63 at that position.

[0049] Although resin protruding stripes, i.e., insert lines, may be left at positions on the first molded product 1 accommodated in the mold insert 67 corresponding to the positions where the mold insert 67 and the mold insert 691 abut against each other, the insert lines can be minimized by mold alignment.

[0050] The method for joining the first molded product 1 and the second molded product 2 described in the present embodiment is also applicable to those described in the first embodiment Figures 3A to 3E and Figures 4A to 4E . Specifically, in the primary molding, a flow channel is formed in the first molded product, and molten resin is injected into the flow channel thus formed.

[0051] In this way, the present embodiment is configured to disassemble and move the mold insert of the first mold 64 provided with the injection units 60, 63. Thus, a product manufacturing method and a manufacturing apparatus can be provided, which can support a complex molding process in molding using a hot runner with a valve gate system.

[0052] Figure 8 is an overall view showing an inkjet printer 80. In the inkjet printer 80, a liquid storage container 81 for holding liquid and an inkjet print head 82 are communicated through a tube 83 and a hollow needle 84. For such an inkjet printer 80, it can be used to manufacture, for example, a connection member 90 for a connection part of the liquid storage container 81 using an injection molding device 38 (see Figures 3A to 3E ). Figure 9B and 9C ).

[0053] Figures 9A to 9C is a view showing the liquid storage container 81, Figure 9A showing an external view, Figure 9B showing an exploded perspective view, Figure 9C showing a partially enlarged view of the connection part. The liquid storage container 81 includes a liquid storage part 91 and a connection member 90. The connection member 90 has a first molded product 1, an elastic member 92, a second molded product 2, and a third molded product 93. The connection member 90 provides a valve function and can hold and supply liquid by inserting the hollow needle 84 into the elastic member 92 having a cutout 110 ( Figure 11A , as described herein).

[0054] Figures 10A to 10C is a view showing a method for manufacturing the connection member 90. In the present embodiment, the first molded product 1, the second molded product 2, and the third molded product 93 are formed by injection molding using the injection molding device 38 ( Figure 10A ). Thereafter, the elastic member 92 is supplied to the second molded product 2 ( Figure 10B), and the first molded product 1 and the third molded product 93 are assembled on top and joined together ( Figure 10C ). Specifically, in the first step, the second molded product 2, the first molded product 1, and the third molded product 93 are formed by primary molding. In the second step, the elastic member 92 is supplied to the second molded product 2, and the first molded product 1 and the third molded product 93 are assembled onto the elastic member 92 and the second molded product 2. Thereafter, in the third step, the second molded product 2, the first molded product 1, and the third molded product 93 are joined together by secondary molding, and in the fourth step, the completed connecting member 90 is removed. The connecting member 90 can be manufactured through such a series of steps.

[0055] Figure 11A and 11B are cross-sectional views showing the first molded product 1, the second molded product 2, and the third molded product 93 in the joining step. In the joining in the third step, the molten resin 111 is injected into the space between the above-mentioned molded products, thereby forming the above-mentioned molded products into an integral molded product. During the injection of the molten resin 111 into the space, the molded products are appropriately pressure-welded while compressing the elastic member 92 using the mold closing force, so that the molded products can be kept stable during the injection and cooling of the molten resin 111. Therefore, no additional equipment is required for compression.

[0056] Other embodiments of the present disclosure will be described below with reference to the accompanying drawings. Since this embodiment has the same basic configuration as the first embodiment, only the different configurations are described, and the similar configurations are incorporated by reference to avoid unnecessary repetition.

[0057] Figures 12A to 12E is a diagram showing other embodiments. Figure 12A shows a configuration in which the first mold 124 includes a plate 121 and the second mold 125 includes a plate 122. In other words, in this configuration, the first mold 124 and the second mold 125 each have a separate plate to enable the movement of their respective mold inserts. Figure 12B shows a configuration in which the second molded product 2 molded using a different device is supplied to the second mold 125 and then joined to the first molded product 1 formed by the first mold 124. The second molded product 2 can be formed of a material different from the material forming the first molded product 1, or can be a composite of different types of molded products.

[0058] Figure 12CThere is shown a configuration in which an intermediate mold 127 is provided between a first mold 124 and a second mold 125. The second molded product 2 is formed by the second mold 125 and the intermediate mold 127, and the intermediate mold 127 rotates to move the second molded product 2 remaining in the intermediate mold 127 to a position facing the first molded product 1 included in the mold insert 123 of the first mold 124. Thereafter, secondary molding is performed to join the first molded product 1 and the second molded product 2 together. In this case, more than one second molded product 2 can be formed between the second mold 125 and the intermediate mold 127. Further, the second molded product 2 molded by primary molding can be formed of a material different from the material forming the first molded product 1, or can be a composite of different types of molded products.

[0059] Figure 12D There is shown a configuration in which Figure 12A an intermediate mold 127 is provided. The intermediate mold 127 does not rotate. Instead, different devices are used to supply the intermediate mold 127 with molded products, different types of components, or composite products combining various articles of different types. This enables molding to be performed both between the first mold 124 and the intermediate mold 127 and between the second mold 125 and the intermediate mold 127 during secondary molding. The assemblies of the first mold 124 and the intermediate mold 127 and the assemblies of the second mold 125 and the intermediate mold 127 may have the same or different shapes.

[0060] Figure 12E There is shown a configuration in which Figure 12D the intermediate mold 127 is rotatable. As in the Figure 12D configuration, different devices are used to supply the intermediate mold 127 with different types of components formed of a material different from the material forming the first molded product 1, or can be a composite of different types of molded products. Thereafter, the intermediate mold 127 rotates to move the molded products supplied thereto to a position facing the positions where secondary molding is performed on the first mold 124 and the second mold 125. This enables molding to be performed both by the first mold 124 and the intermediate mold 127 and by the second mold 125 and the intermediate mold 127. After molding, the finished product produced by secondary molding can be removed by rotating the intermediate mold 127 by 90°.

[0061] Although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the disclosed exemplary embodiments. The scope of the appended claims should be given the broadest interpretation to cover all such variations and equivalent structures and functions.

Claims

1. A method for manufacturing a product, comprising: Closing the first mold onto the second mold, injecting molten resin from at least one injection unit provided on the first mold into a first mold insert of the first mold to mold a first molded product; opening the first mold and the second mold to separate the first plate including the first mold insert from the first mold; moving the first mold insert to a position where the first molded product and the second molded product at the second mold face each other; and The first molded product is joined with the second molded product. 2 . The method for manufacturing an article according to claim 1 , wherein the moving the first mold insert is performed by sliding the first mold insert along the first mold. 3 . The method of manufacturing an article according to claim 1 , wherein the moving the first mold insert is performed by rotating the first plate.

4. The method for manufacturing an article according to claim 2, wherein the first molded product is molded by injecting through a first injection unit among the at least one injection unit provided on the first mold, After the first mold insert is moved, injection is performed by a second injection unit among the at least one injection unit provided on the first mold to join the first molded product with the second molded product. 5 . The article manufacturing method according to claim 4 , wherein the first molded product and the second molded product molded by a third injection unit are joined. The product manufacturing method according to claim 5 , wherein the third injection unit is provided on the second mold. 7 . The method for manufacturing an article according to claim 2 , further comprising sliding a second mold insert of the second mold.

8. The method for manufacturing a product according to claim 7, wherein the at least one injection unit disposed on the first mold comprises: a first injection unit for injecting the first mold insert, A second injection unit performs injection into the second mold insert.

9. The method for manufacturing a product according to claim 4, further comprising: A first separation mold insert covers an injection end of the first injection unit and separates the first injection unit from the first mold insert when the first mold and the second mold are opened.

10. The method for manufacturing a product according to claim 9, further comprising: A second separation mold insert is configured to cover an injection end of the second injection unit and separate the second injection unit from the first mold insert when the first mold and the second mold are opened after the first molded product is joined with the second molded product.

11. The method for manufacturing an article according to claim 5, wherein the second molded product is a composite product formed of molded products of different types. 12 . The method of manufacturing an article according to claim 6 , wherein the molten resin injected by the third injection unit to form the second molded product is different from the molten resin to form the first molded product.

13. The method for manufacturing a product according to claim 7, further comprising: A second plate including the second mold insert is separated from the second mold, wherein the separation of the second plate from the second mold is performed together with the separation of the first plate from the first mold.

14. A method for manufacturing a product, comprising: closing the first mold onto the second mold and the intermediate mold, wherein the intermediate mold is disposed between the first mold and the second mold, injecting molten resin from at least one injection unit provided on the first mold into a first mold insert of the first mold to mold a first molded product; opening the first mold, the second mold, and the intermediate mold to separate the first plate including the first mold insert from the first mold; moving the first mold insert to a position where the first molded product and the second molded product at the second mold face each other; and The first molded product is joined with the second molded product.

15. The method of manufacturing an article according to claim 14, further comprising rotating the intermediate mold before joining the first molded product with the second molded product. 16 . The method for manufacturing an article according to claim 14 , wherein the intermediate mold is supplied with a material different from the molten resin supplied from the at least one injection unit.

17. A manufacturing device comprising: a first mold provided with an injection unit for injecting molten resin; a second mold configured to be closed together with the first mold for molding with molten resin; and a mold insert provided at the first mold, into which the molten resin is injected from the injection unit, Wherein, the first mold includes a plate that moves the mold insert away from the injection unit, and the plate is configured to move the mold insert moved away from the injection unit on the plate.

18. The manufacturing apparatus according to claim 17, wherein when the first mold and the second mold are opened, the plate is moved away from the injection unit by an elastic member.

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