Method for manufacturing article and manufacturing apparatus

Abstract

To provide a method for manufacturing an article and a manufacturing apparatus that can accommodate complex molding in a molding operation adopting a hot runner valve gate system.SOLUTION: The present invention is configured by moving a slide core 47 of a first mold 44 provided with injection units 40 and 43.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a method of performing secondary molding by opposing two molded articles formed by primary molding and performing mold clamping again by sliding a piece including one of the two molded articles formed by primary molding by driving means. The method of Patent Document 1 is a method using an injection unit of a cold runner, and in the method using an injection unit of a cold runner, waste materials such as sprues and runners are generated. Further, gate cutting is required in the molding process, and there is a concern about a decrease in productivity because the molding cycle time is extended.

[0003] Therefore, in recent years, due to consideration for the environment, suppression of waste materials has been demanded, and in order to suppress a decrease in productivity, the adoption of a hot runner, which is runnerless molding, has been increasing. The hot runner has two types of gate systems: an open gate in which a gate for supplying molten resin is always open, and a valve gate in which the gate opens during injection and closes after injection. In recent years, the valve gate system has been widely adopted for reasons such as preventing dripping and stringing of molten resin, stabilizing the product weight, and achieving a beautiful appearance.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a hot runner is adopted and more complex joining is to be performed inside the mold, it is required to slide the ejector in the mold on the side where the injection unit is provided. However, in the mold provided with an injection unit adopting the valve gate system, since the valve for closing the gate interferes with the ejector and the ejector cannot be freely slid, the conventional method cannot cope with complex molding.

[0006] Therefore, the present invention provides a method and an apparatus for manufacturing an article that can cope with complex molding in molding adopting the valve gate system of a hot runner.

Means for Solving the Problems

[0007] Therefore, the method for manufacturing an article of the present invention includes a primary molding step of molding a first molded article by clamping a first mold provided with an injection unit for injecting a molten resin and a second mold and injecting the molten resin from the injection unit into a first ejector of the first mold, and a secondary molding step of joining the first molded article formed in the primary molding step and a second molded article of the second mold. The method for manufacturing an article includes a separation step of separating a first plate including the first ejector from the first mold when the first mold and the second mold are opened after the primary molding step, and a first slide step of sliding the first ejector and moving it to a position where the first molded article and the second molded article face each other after the separation step.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a method and an apparatus for manufacturing an article that can cope with complex molding in molding adopting the valve gate system of a hot runner.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

MODE FOR CARRYING OUT THE INVENTION

[0010] (First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0011] FIGS. 1(a) to (c) are figures showing the process of joining general molded products with a molten resin. As shown in FIG. 1(a), the first molded product 1 and the second molded product 2 molded by primary molding are opposed to each other, and as shown in FIG. 1(b), they are assembled by clamping to form an internal space 3. Then, as shown in FIG. 1(c), molten resin 4 is poured into the internal space 3 by secondary molding to join the first molded product 1 and the second molded product 2.

[0012] Figure 2 is a diagram showing a conventional configuration. In Figure 2, in molding using a mold with an injection unit and a mold without an injection unit, the process of molding in which a workpiece is slid using a mold without an injection unit is shown. As shown in Figure 2(a), 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 Figures 2(b) and 2(c), the first mold 24 and the second mold 25 are opened, and the workpiece 27 including the second molded product 22 provided in the second mold 25 is slid to a position facing the workpiece 26 including the first molded product 21. In Figure 2(d), the first mold 24 and the second mold 25 are clamped, and the first molded product 21 and the second molded product 22 are joined by injecting molten resin from the injection unit 23 as secondary molding.

[0013] However, in such a conventional configuration, the workpiece 26 of the first mold 24 provided with the injection units 20 and 23 is engaged with the valves provided in the injection units 20 and 23, and since the valves interfere, the workpiece 26 cannot be slid and moved. Therefore, in the conventional method, there were cases where it was not possible to handle complex molding. Hereinafter, a method for moving the workpiece 26 of the first mold 24 provided with the injection units 20 and 23 in the present embodiment to handle complex molding will be described.

[0014] Figure 3 is a diagram showing the molding process in the injection molding apparatus 38 of the present embodiment. Hereinafter, the molding process in the present embodiment will be described in order of steps. In Figure 3, the mold configuration in the injection molding apparatus 38 will be mainly described, and the description of the driving device for moving the mold will be omitted. The injection molding apparatus 38 in the present embodiment includes a plate 31 having a workpiece 37 between the first mold 34 and the second mold 35.

[0015] First, from the mold-open state as shown in Fig. 3(a), the first mold 34 and the second mold 35 are clamped as shown in Fig. 3(b), and the molten resin is injected from the injection unit 30 to perform the primary molding of the first molded product 1 and the second molded product 2. By clamping the first mold 34 and the second mold 35, the piece 37 on the plate 31 engages with the valve of the injection unit 30 of the first mold 34 to form a moldable state. After the primary molding, as shown in Fig. 3(c), the first mold 34 and the second mold 35 are opened. When the first mold 34 and the second mold 35 are opened, as shown in Fig. 3(c), the plate 31 is separated from the first mold 34 by the force (action) of the spring 32, and the valve provided in the injection unit 30 and the piece 37 are disengaged.

[0016] In this way, with the mold opening, the plate 31 is separated from the first mold 34 by the spring 32, so that the piece 37 can be separated from the injection unit 30 when the mold is opened without using a drive source. The plate 31 is provided with a mechanism (moving means) for sliding the piece 37, and the piece 37 can be slid. In addition to the spring, for separating the plate 31 from the first mold 34, for example, driving by an air cylinder, an electric cylinder, a hydraulic unit, etc. can be considered, but it is desirable to select in consideration of the responsiveness according to the mold opening and closing operation, the molded product size, and the mold configuration.

[0017] As shown in Fig. 3(d), the piece 37 is slid so that the piece 37 including the first molded product 1 moves to a position facing the second molded product 2. For sliding the piece 37, for example, it is conceivable to operate the piece 37 with an air cylinder or the like along a guide arranged on the plate 31. Also, it is possible to increase the number of times of molding, such as the third molding and the fourth molding, while moving the piece 37. In that case, it is desirable to operate with a servo motor or the like that can arbitrarily change the slide position of the piece 37. In addition to sliding, as a method of moving the piece 37, a method of rotating the plate 31 is also conceivable. When moving the piece 37 by rotation, it is desirable to operate with a servo motor that can arbitrarily change the rotation position, a configuration combining a rack & pinion and a cylinder, etc.

[0018] As shown in Fig. 3(e), the first mold 34 and the second mold 35 are clamped. By clamping, the plate 31 is sandwiched between the first mold 34 and the second mold 35, and the part 37 engages with the valve of the injection unit 33. Also, the first molded product 1 and the second molded product 2 of the part 37 are in a combined state. Secondary molding is performed by injecting molten resin from the injection unit 33, and the first molded product 1 and the second molded product 2 are joined together.

[0019] A configuration in which a part is slid in a mold equipped with an injection unit as in this embodiment is particularly useful when the molded product is small. That is, when the molded product is small, due to the unit pitch of the injection unit, the injection unit 20 and the injection unit 23 cannot be arranged side by side with respect to one part (see the part 26 in Fig. 2) as in the conventional case. In the configuration in which a part is slid in a mold equipped with an injection unit as in this embodiment, even in the case of a small molded product, the injection units can be arranged apart from each other.

[0020] In a conventional molding that has no slide mechanism in either the first mold or the second mold, the first molded product and the second molded product are molded in the primary molding, the second molded product is taken out from the part, attached to a position facing the first molded product, and the secondary molding is also performed. In such a conventional method, when the second molded product is taken out from the part after the primary molding, it is protruded and taken out with an ejector pin or the like, so a protruding mark remains on the second molded product.

[0021] However, in the configuration of this embodiment, since the secondary molding can be performed with the first molded product and the second molded product facing each other without taking out the molded product formed in the primary molding, no protruding mark remains on the molded product.

[0022] Also, in the conventional configuration described in Fig. 2, the secondary molding can be performed without taking out the molded product formed in the primary molding. However, when taking out the molded product that has become an integral object by joining in the secondary molding, the molded product is left on the side of the second mold 25 (see Fig. 2), and it is taken out by protruding with an ejector pin or the like, and a protruding mark remains on the molded product.

[0023] However, in this embodiment, when taking out the molded product that has become an integral body from the piece 37 of the plate 31 separated from the first mold 34 (see FIG. 3) after secondary molding, instead of pushing it out, the molded product is taken out by a robot or the like, and no protruding mark remains on the molded product.

[0024] (Modification example) FIG. 4 is a diagram showing the molding process in the injection molding apparatus 48 according to a modification example of this embodiment. Hereinafter, the molding process in this modification example will be described in the order of the steps. Note that in FIG. 4, the mold configuration in the injection molding apparatus 48 will be mainly described, and the description of the driving device for moving the mold will be omitted. In this modification example, in addition to the configuration of the above embodiment, the piece of the second mold is also configured to be movable.

[0025] In the injection molding apparatus 48, both the piece 47 of the first mold 44 and the piece 49 of the second mold 45 are configured to be movable. As shown in FIG. 4(a), similar to the description in FIG. 3, for the piece 47 of the first mold 44, even if the injection units 40 and 43 are provided in the first mold 44, the piece 47 can be separated from the injection units 40 and 43 and moved by separating the first mold 44 and the plate 41. Since the injection unit is not provided in the second mold 45, the piece 49 can be moved.

[0026] As shown in FIG. 4(b), the first mold 44 and the second mold 45 are clamped, and primary molding is performed to mold the first molded product 1 and the second molded product 2. The primary molding is performed using the injection unit 43 provided in the first mold 44 for both the pieces 47 and 49. After the primary molding, as shown in FIG. 4(c), the first mold 44 and the second mold 45 are opened. By opening the mold, the plate 41 is separated from the second mold 44. In this state, the piece 47 of the first mold 44 and the piece 49 of the second mold 45 are moved (slid) to positions corresponding to the injection unit 40 used in the secondary molding. The piece 47 of the first mold 44 can move because the plate 41 is separated from the second mold 44. FIG. 4(d) shows a state where the movement of the piece 47 of the first mold 44 and the piece 49 of the second mold 45 is completed. In the state of FIG. 4(d), the piece 47 of the first mold 44 and the piece 49 of the second mold 45 are facing each other. In this state, as shown in FIG. 4(e), the first mold 44 and the second mold 45 are clamped, and secondary molding is performed using the injection unit 40 to join the first molded product 1 and the second molded product 2. As a method for moving the piece 47, in addition to sliding, a method of rotating the plate 41 is also conceivable. The rotation is preferably operated by a servo motor capable of arbitrarily varying the rotation position, a configuration combining a rack & pinion and a cylinder, or the like.

[0027] Thus, a configuration is adopted in which the piece 47 of the first mold 44 provided with the injection units 40 and 43 is moved. As a result, in molding employing the valve gate method of the hot runner, a manufacturing method and a manufacturing apparatus for an article capable of coping with complex molding can be provided.

[0028] (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. Since the basic configuration of this embodiment is the same as that of the first embodiment, the characteristic configuration will be described below.

[0029] FIG. 5 is a cross-sectional view showing the injection unit 40 (see FIG. 4) in the first embodiment and a part of the piece 47 combined with the injection unit 40. FIG. 5(a) shows a state where the injection unit 40 and the piece 47 are combined, and FIG. 5(b) shows a state where the injection unit 40 and the piece 47 are separated. Here, the injection unit 40 and the piece 47 will be described as an example, but the injection unit 40 and the piece 43 are the same.

[0030] The piece 47 is provided with a needle hole 50 into which the needle pin 51 at the tip of the injection unit 40 is inserted. The gap between the needle pin 51 and the needle hole 50 when combined is provided narrowly to reduce the amount of molten resin injected from the injection unit 40 that enters. Therefore, in the configuration of the first embodiment, the needle pin 51 and the needle hole 50 repeatedly engage and disengage with the clamping and opening of the first mold 44 and the second mold 45, and the needle pin 51 may wear. Therefore, in the present embodiment, a configuration for suppressing the wear of the needle pin 51 is provided with the clamping and opening of the first mold 44 and the second mold 45. Hereinafter, the configuration for suppressing the wear of the needle pin 51 will be described.

[0031] FIGS. 6(a) to (e) are diagrams showing the molding process in the injection molding apparatus 68 of the present embodiment. Hereinafter, the molding process in the present embodiment will be described in the order of the process. In FIG. 6, the mold configuration in the injection molding apparatus 68 will be mainly described, and the description of the drive device for moving the mold will be omitted.

[0032] In the injection molding apparatus 68 of this embodiment, the ejector is divided into an ejector 67 for storing the molded product, an ejector (separating ejector) 691 that abuts against the injection unit (injection unit A) 60, and an ejector 692 that abuts against the injection unit (injection unit B) 63. The ejector 691 covers the injection end of the injection unit 60, and the ejector 692 covers the injection end of the injection unit 63. In this way, the ejector 67 for storing the molded product is divided into the ejector 691 that abuts against the injection unit 60 and the ejector 692 that abuts against the injection unit 63. As a result, when the first mold 64 and the second mold 65 are clamped and opened, the ejectors are inserted and removed from each other, and the ejector and the injection unit are not inserted and removed from each other. Therefore, wear of the needle pin 51 can be suppressed.

[0033] When the first mold 64 and the second mold 65 are clamped as shown in FIG. 6(b) from the mold opening state of FIG. 6(a), the ejector 67 and the ejector 691 are combined. Since the injection unit 60 abuts against the ejector 691, injection can be performed from the injection unit 60 into the ejector 67. In this way, primary molding is performed, the first molded product 1 is formed in the first mold 64, and the second molded product is formed in the second mold 65. Thereafter, when the first mold 64 and the second mold 65 are opened as shown in FIG. 6(c), the first mold 64 and the plate 61 are separated, and the ejector 67 and the ejector 691 are separated.

[0034] As shown in FIG. 6(d), the ejector 67 is slid, and the ejector 67 including the first molded product 1 moves to a position facing the second molded product 2. Thereafter, as shown in FIG. 6(e), the first mold 64 and the second mold 65 are clamped. By clamping, the plate 61 is sandwiched between the first mold 64 and the second mold 65, and the ejector 67 and the ejector 692 are engaged. In addition, the first molded product 1 and the second molded product 2 of the ejector 67 are combined. Secondary molding is performed by injecting molten resin from the injection unit 63, and the first molded product 1 and the second molded product 2 are joined.

[0035] Figure 7 is an enlarged view of FIGS. 6(c) and 6(d). In FIG. 7, the description of the plate 61 is omitted for easier understanding of the state of the piece 67. The pieces on the side where the injection units 60 and 63 are located are divided into a piece 67 and a piece 691, and the piece 67 and the piece 691 are brought into contact with and separated from each other by highly accurate alignment using a mold. Similarly, for the piece 692, the piece 67 and the piece 692 are brought into contact with and separated from each other by highly accurate alignment using a mold.

[0036] The second mold 65 includes a flow path forming member 70, and the flow path forming member 70 forms a flow path 71 for secondary molding inside the first molded product 1 in the primary molding. In the secondary molding, molten resin is poured into the flow path 71 from the injection unit 63 to join the first molded product 1 and the second molded product 2.

[0037] The flow path 71 is provided at a position that becomes the gate of the injection unit 63 when the piece 67 moves to a position facing the piece 692 where the secondary molding is performed.

[0038] In the first molded product 1 housed in the piece 67, a ridge-like resin bulge called an insert line remains at the contact portion between the piece 67 and the piece 691, but it is possible to suppress the insert line as much as possible by alignment.

[0039] In FIGS. 3 and 4 described in the first embodiment as well, the joining of the first molded product 1 and the second molded product 2 is performed by forming a flow path in the first molded product in the primary molding and pouring molten resin into the formed flow path, as described in this embodiment.

[0040] In this way, the pieces of the first mold 64 provided with the injection units 60 and 63 are separated and moved. Thereby, in molding adopting the valve gate method of the hot runner, it is possible to provide a manufacturing method and a manufacturing apparatus for an article that can cope with complicated molding.

[0041] (Application Example) FIG. 8 is an overall view showing an inkjet printer 80. In an injection molding apparatus 38 (see FIG. 3), a liquid storage container 81 holding a liquid and an inkjet print head 82 communicate with each other via a tube 83 and a hollow needle 84. In such an inkjet printer 80, for example, when manufacturing a connection member 90 (described later) used for a connection portion of the liquid storage container 81, it is useful to use the injection molding apparatus 80.

[0042] FIG. 9 is a view showing the liquid storage container 81. FIG. 9(a) shows an external view, FIG. 9(b) shows an exploded perspective view, and FIG. 9(c) shows a partially enlarged view of the connection portion. The liquid storage container 81 includes a liquid storage portion 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 the function of a valve that can hold and supply liquid by inserting the hollow needle 84 into the elastic member 92 having a cut (cut 110 shown in FIG. 11 described later).

[0043] FIG. 10 is a view showing a manufacturing method of 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 an injection molding apparatus 38 (see FIG. 10(a)). Thereafter, the elastic member 92 is supplied to the second molded product 2 (see FIG. 10(b)), and the first molded product 1 and the third molded product 93 are assembled and joined thereon (see FIG. 10(c)). That is, in the primary molding of the first step, the second molded product 2, the first molded product 1, and the third molded product 93 are molded. 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 thereon. Thereafter, in the secondary molding of the third step, the second molded product 2, the first molded product 1, and the third molded product 93 are joined, and in the fourth step, the completed connection member 90 is taken out. The connection member 90 can be manufactured by such a series of steps.

[0044] FIG. 11 is a cross-sectional view showing the first molded product 1, the second molded product 2, and the third molded product 93 in the joining process. In the joining in the fourth process, the molten resin 111 is poured into the space formed between the molded products to form an integral molded product. When pouring the molten resin 111 into the space, the elastic member 92 is compressed using the clamping force to appropriately press the molded products against each other, thereby stably holding the molded products until the molten resin 111 is poured and cooled. This eliminates the need for additional equipment for compression.

[0045] (Other Embodiments) Hereinafter, other embodiments of the present invention will be described with reference to the drawings. Since the basic configuration of this embodiment is the same as that of the first embodiment, the characteristic configuration will be described below.

[0046] FIGS. 12(a) to (e) are diagrams showing other embodiments. FIG. 12(a) shows a configuration in which the first mold 124 includes a plate 121 and the second mold 125 includes a plate 122. That is, both the first mold 124 and the second mold 125 include plates and are configured to allow the movement of the pieces. Such a configuration may be used. FIG. 12(b) shows a configuration in which the second molded product 2 molded using another 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 may be a dissimilar member made of a material different from that of the first molded product 1 or a composite in which a dissimilar member is inserted into the molded product. Such a configuration may be used.

[0047] FIG. 12(c) shows a configuration in which an intermediate mold 127 is disposed 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 second molded product 2 left on the intermediate mold 127 is moved to a position facing the first molded product 1 included in the die 123 of the first mold 124 by rotating the intermediate mold 127. Thereafter, secondary molding is performed to join the first molded product 1 and the second molded product 2. At this time, a plurality of second molded products 2 may be formed between the second mold 125 and the intermediate mold 127, and the second molded product 2 formed by primary molding may be a dissimilar member made of a material different from that of the first molded product 1 or a composite body in which a dissimilar member is inserted into the molded product. Such a configuration may be employed.

[0048] FIG. 12(d) shows a configuration in which the intermediate mold 127 is disposed in the configuration of FIG. 12(a). Without rotating the intermediate mold 127, a molded product, a dissimilar member, or a composite body in which various articles such as dissimilar members are combined is supplied to the intermediate mold 127 using another device. Thereby, both the first mold 124 and the intermediate mold 127 and the second mold 125 and the intermediate mold 127 can be formed by secondary molding. Note that the first mold 124 and the intermediate mold 127 and the second mold 125 and the intermediate mold 127 may have the same shape or different shapes. Such a configuration may be employed.

[0049] FIG. 12(e) shows a configuration in which the intermediate mold 127 is rotatable in the configuration of FIG. 12(d). Similar to the configuration of FIG. 12(d), a dissimilar member made of a material different from that of the first molded product 1 or a composite body in which a dissimilar member is inserted into the molded product is supplied to the intermediate mold 127 using another device. Thereafter, the intermediate mold 127 is rotated to move the supplied molded product to a position facing the positions where secondary molding is performed on the first mold 124 and the second mold 125, respectively. Thereby, both the first mold 124 and the intermediate mold 127 and the second mold 125 and the intermediate mold 127 can be molded. After molding, the intermediate mold 127 can be rotated by 90° to discharge the completed product of secondary molding. Such a configuration may be employed.

[0050] The disclosure of the present embodiment includes the following methods and configurations.

[0051] (Method 1) A first mold equipped with an injection unit for injecting molten resin, and a second mold, are clamped together, and a primary molding step of molding a first molded product by injecting molten resin from the injection unit into a first insert of the first mold; A method for manufacturing an article, comprising: a secondary molding step of joining the first molded product formed in the primary molding step and a second molded product of the second mold, wherein: In the mold opening of the first mold and the second mold after the primary molding step, a separation step of separating a first plate including the first insert from the first mold; After the separation step, a first sliding step of sliding the first insert to move it to a position where the first molded product and the second molded product face each other. The manufacturing method of the article is characterized by comprising the above steps.

[0052] (Method 2) The manufacturing method of the article according to Method 1, wherein the moving step is a first sliding step of sliding the first insert.

[0053] (Method 3) The manufacturing method of the article according to Method 1, wherein the moving step is a rotating step of rotating the first plate.

[0054] (Method 4) In the primary molding step, a first injection unit provided in the first mold performs injection. In the secondary molding step after the first sliding step, a second injection unit provided in the first mold performs injection to join the first molded product and the second molded product. The manufacturing method of the article according to Method 2.

[0055] (Method 5) In the secondary molding step, the second molded product molded by another device and the first molded product are joined. The manufacturing method of the article according to any one of Methods 1 to 4.

[0056] (Method 6) In the primary molding process, the method for manufacturing an article according to any one of Methods 1 to 4 of molding the second molded article with the third injection unit provided in the second mold.

[0057] (Method 7) The method for manufacturing an article according to Method 2 having a second slide step of sliding a second workpiece provided in the second mold.

[0058] (Method 8) The first injection unit provided in the first mold includes a first injection unit A and a first injection unit B. In the primary molding process, the method for manufacturing an article according to Method 7 in which injection is performed from the first injection unit A onto the first workpiece and injection is performed from the first injection unit B onto the second workpiece.

[0059] (Method 9) The first workpiece includes a first separating workpiece that covers the injection end of the first injection unit and separates from the first workpiece as the first mold and the second mold are opened. The method for manufacturing an article according to Method 4.

[0060] (Method 10) The first workpiece includes a second separating workpiece that covers the injection end of the second injection unit, and the second separating workpiece separates from the first workpiece as the first mold and the second mold are opened after the secondary molding. The method for manufacturing an article according to Method 9.

[0061] (Method 11) The method for manufacturing an article according to Method 5 in which the second molded article is a composite body in which a dissimilar member is inserted into a molded article.

[0062] (Method 12) In the method for manufacturing an article according to Method 6, molten resin of a material different from that of the first molded article is injected from the third injection unit to form the second molded article, which is a dissimilar member of a material different from that of the first molded article.

[0063] (Method 13) In the separation step, a method for manufacturing an article as described in Method 7 for separating a second plate including the second workpiece from the second mold.

[0064] (Method 14) A primary molding step of molding a first molded article by clamping a first mold having an injection unit for injecting molten resin, a second mold, and an intermediate mold provided between the first mold and the second mold, and injecting the molten resin from the injection unit into a first workpiece of the first mold; A method for manufacturing an article having a secondary molding step of joining the first molded article formed in the primary molding step and a second molded article of the second mold, In mold opening after the primary molding step, a separation step of separating a first plate including the first workpiece from the first mold; After the separation step, a moving step of moving the first workpiece to a position where the first molded article and the second molded article face each other, characterized in that the method for manufacturing an article has the moving step.

[0065] (Method 15) The method for manufacturing an article according to Method 14, having a rotating step of rotating the intermediate mold after the primary molding step.

[0066] (Method 16) The method for manufacturing an article according to Method 14 or 15, having a supply step of supplying a molded article molded by another device to the intermediate mold.

[0067] (Configuration 1) A first mold having an injection unit for injecting molten resin, A second mold that performs mold clamping with the first mold and molds molten resin, A workpiece provided in the first mold and into which molten resin is injected from the injection unit, A manufacturing apparatus comprising: The first mold includes a plate that separates the workpiece from the injection unit, The plate is provided with moving means for moving the workpiece separated from the injection unit, characterized in that the manufacturing apparatus has the moving means.

[0068] Configuration 2 The manufacturing apparatus according to Configuration 1, wherein when the first mold and the second mold are opened, the plate separates the workpiece from the injection unit by the action of a spring.

Explanation of Reference Numerals

[0069] 1 First molded product 2 Second molded product 30 Injection unit 31 Plate 32 Spring 33 Injection unit 34 First mold 35 Second mold 37 Workpiece

Claims

1. A first mold equipped with an injection unit for injecting molten resin, a second mold, and a primary molding step of molding a first molded product by clamping the first and second molds and injecting molten resin from the injection unit into a first insert of the first mold. A method for manufacturing an article, comprising: a secondary molding step of joining the first molded product formed in the primary molding step and a second molded product of the second mold. In the mold opening of the first mold and the second mold after the primary molding step, a separation step of separating a first plate including the first insert from the first mold. After the separation step, a moving step of moving the first insert to a position where the first molded product and the second molded product face each other. The method for manufacturing an article is characterized by having this moving step.

2. The method for manufacturing an article according to claim 1, wherein the moving step is a first sliding step of sliding the first insert.

3. The method for manufacturing an article according to claim 1, wherein the moving step is a rotating step of rotating the first plate.

4. In the primary molding step, a first injection unit provided in the first mold performs injection. In the secondary molding step after the first sliding step, a second injection unit provided in the first mold performs injection to join the first molded product and the second molded product. The method for manufacturing an article according to claim 2.

5. The method for manufacturing an article according to claim 1, wherein in the secondary molding step, the second molded product molded by another device and the first molded product are joined.

6. The method for manufacturing an article according to claim 1, wherein in the primary molding step, the second molded product is molded by a third injection unit provided in the second mold.

7. The method for manufacturing an article according to claim 2, further comprising a second sliding step of sliding a second insert provided in the second mold.

8. The first injection units provided in the first mold are a first injection unit A and a first injection unit B, In the primary molding step, injection is performed from the first injection unit A into the first part, and injection is performed from the first injection unit B into the second part. The method for manufacturing an article according to claim 7.

9. The first part includes a first separating part, and the first separating part covers the injection end of the first injection unit and separates from the first part as the first mold and the second mold are opened. The method for manufacturing an article according to claim 4.

10. The first part includes a second separating part that covers the injection end of the second injection unit, and the second separating part separates from the first part as the first mold and the second mold are opened after the secondary molding. The method for manufacturing an article according to claim 9.

11. The second molded product is a composite obtained by inserting a dissimilar member into a molded product. The method for manufacturing an article according to claim 5.

12. Injecting a molten resin of a material different from that of the first molded product from the third injection unit to form the second molded product, which is a dissimilar member of a material different from that of the first molded product. The method for manufacturing an article according to claim 6.

13. In the separating step, Separating a second plate including the second part from the second mold. The method for manufacturing an article according to claim 7.

14. A first mold provided with an injection unit for injecting a molten resin, a second mold, and an intermediate mold provided between the first mold and the second mold are clamped, and a primary molding step of molding a first molded product by injecting a molten resin from the injection unit into a first part of the first mold, A method for manufacturing an article having a secondary molding step of joining the first molded product formed in the primary molding step and a second molded product of the second mold, In the mold opening after the primary molding process, a separating step of separating a first plate including the first workpiece from the first mold; After the separating step, a moving step of moving the first workpiece to a position where the first molded article and the second molded article face each other, the method for manufacturing an article being characterized by including these steps.

15. The method for manufacturing an article according to claim 14, having a rotating step of rotating the intermediate mold after the primary molding process.

16. The method for manufacturing an article according to claim 14, having a supplying step of supplying a molded article molded by another device to the intermediate mold.

17. A first mold provided with an injection unit for injecting molten resin; A second mold that closes the mold with the first mold and molds the molten resin; A workpiece provided in the first mold, into which the molten resin is injected from the injection unit; A manufacturing apparatus comprising: The first mold includes a plate that separates the workpiece from the injection unit; The manufacturing apparatus is characterized in that the plate includes moving means for moving the workpiece separated from the injection unit.

18. The manufacturing apparatus according to claim 17, wherein when the first mold and the second mold are opened, the plate separates the workpiece from the injection unit by the action of a spring.

Images