Die component, molding die, and method for molding molded article

Abstract

To provide a die component that enables a sprue bushing part to be detached from the die.SOLUTION: A die component 200 is disposed in a molding die 20 including a first die 106 and a second die 118, the molding die used for injecting a molding material into an internal cavity and producing a molded article corresponding to the shape of the cavity. The die component is disposed on a side surface of the molding die orthogonal to a contact surface between the first die and the second die and comprises a first die component attached to the first die and a second die component attached to the second die. The first die component and the second die component are each provided with a through-hole which allows the passage of an attachment member for attaching the first die component and the second die component to the molding die.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mold part, a molding mold, and a molding method for a molded product. [Background technology]

[0002] There are plastic models commonly known as "colored plastics" that are molded using a technique in which multiple colored plastics are poured onto a single runner and then several colors of plastic are simultaneously molded within a frame using a molding machine known as a multi-color molding machine (see Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] GUNDAM WORLD ENCYCLOPEDIA "Iropla" http: / / www.gudamer.sakura.ne.jp / wiki / wiki.cgi / GUNDAM?page=%BF%A7%A5%D7%A5%E9 Summary of the Invention [Problem to be solved by the invention]

[0004] To mold "colored plastics," different colored plastic materials must be injected into a mold. The sprue bushing into which the plastic material is injected is sometimes carved into the side of the mold using a general-purpose milling machine. Such sprue bushings can be crushed by the impact of injecting the plastic material, resulting in resin leakage. To reshape the bushing, the mold must be removed from the molding machine and the crushed sprue bushing must be re-carved using a general-purpose milling machine, a process that requires considerable time. While replaceable sprue bushings have been proposed, they cannot be used on the parting surfaces of the mold.

[0005] In response to this, the present invention aims to provide a mold component that allows the sprue bushing portion to be removed from the mold, as well as to provide a molding mold and a molding method for molding a molded product that utilizes the mold component. [Means for solving the problem]

[0006] The present invention, which solves the above problems, is a mold component, A mold part to be placed in a molding mold consisting of a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity, disposed on a side surface of the molding die perpendicular to a contact surface between the first mold and the second mold, a first mold part attached to the first mold; a second mold part attached to the second mold; and Including, a recess is formed on each of the contact surfaces where the first mold part and the second mold part come into contact with each other when they are placed in the molding die, and the recess forms a first opening for injecting the molding material into the molding die when the first mold part and the second mold part are placed in the molding die; The first mold part and the second mold part each have a through hole formed therein through which an attachment member for attachment to the molding die passes. [Effects of the Invention]

[0007] The present invention provides a sprue bushing portion as a mold component that can be removed from the mold, and also provides a molding mold and a molding method that utilize the mold component, thereby improving work efficiency. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a cross-sectional view illustrating the molding device according to the embodiment. [Figure 2]1A is a perspective view of the appearance of a molding die 20 according to an embodiment, and FIG. 1B is a plan view of the same. [Figure 3] (A) and (B) are perspective views showing an example of the appearance of the front and back surfaces of a mold part 200 of a molding mold according to an embodiment, (C) is a diagram showing an example of the configuration of the contact surface of the mold part 200, and (D) is a cross-sectional view showing an example of the cross-sectional structure of the mold part 200 on the B-B' plane. [Figure 4] 1A is a diagram showing an example of the configuration of a mounting portion of a molding die 20 for a mold part 200, and FIG. 1B is a diagram showing an example of the configuration of a contact surface of a male die 106 of the molding die 20. FIG. [Figure 5] (A) is a cross-sectional view showing an example of the cross-sectional structure on the A-A' plane when the mold part 200 is attached to the molding mold 20, (B) is a diagram showing the state in which the screw 203 has been removed from the cross-sectional view of (A), and (C) is a diagram showing an example of the structure of the screw 203. [Figure 6] FIG. 2 is a diagram showing an example of the configuration of a cavity in a molding die 20. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following embodiments will be described in detail with reference to the accompanying drawings. The following embodiments do not limit the scope of the claimed invention, and not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more of the features described in the embodiments may be combined arbitrarily. Identical or similar components are designated by the same reference numerals, and redundant descriptions will be omitted. In each drawing, the up / down, left / right, front / back directions relative to the paper surface will be used in the description of the present embodiment as the up / down, left / right, front / back directions of the components (or parts) in the present embodiment. While the present invention assumes a resin material as the molding material in the embodiments described below, this is not limited to this, and other materials (such as thermoplastic resins such as polystyrene, polyethylene, and ABS, thermosetting resins, and metals) can also be used.

[0010] Figure 1 shows a cross-sectional view of a molding apparatus 10 corresponding to an embodiment of the invention. As shown in Figure 1, molding apparatus 10 of this embodiment has a movable mold body 102 attached to the moving side of a molding material injection device (not shown) that injects molding material, and a fixed mold body 103 attached to the fixed side of the molding material injection device. Runner grooves into which the molding material flows are formed in each of movable mold body 102 and fixed mold body 103.

[0011] The movable mold body 102 includes a male mold mounting plate 107 to which a male mold 106 is attached, a fixed base 108 to which the male mold mounting plate 107 is fixed, a movable side mounting plate 109 to which the molding material injection device is attached, and a spacer 110 provided between the fixed base 108 and the movable side mounting plate 109. The male mold 106 and the male mold mounting plate 107 may be configured integrally or may be configured as separate, independent bodies. A cavity 111 is formed in the fixed base 108, and a movable pusher plate 112 is provided within the cavity 111. The pusher plate 112 is fixed to a pressing shaft 116 provided in openings 114, 115 formed in the fixed base 108 and the movable side mounting plate 109. The pusher plate 112 also has a knockout pin 113 formed therein, which penetrates the male mold mounting plate 107 and the male mold 106. Here, by moving the push-out plate 112, the tip of the knock-out pin 113 is formed to protrude into the runner groove.

[0012] The fixed mold body 103 has a fixed mounting plate 117 attached to the molding material injection device, a female mold mounting plate 119 to which a female mold 118 is attached, and a spacer 120 provided between the fixed mounting plate 117 and the female mold mounting plate 119. The female mold 118 and the female mold mounting plate 119 may be integrally configured or may be configured as separate, independent bodies. A sprue bushing 104 is attached to the fixed mold body 103 for injecting molten molding material from a molding injection device. The sprue bushing 104 extends through the fixed mounting plate 117 to the female mold 118, and a sprue 105 is formed inside the sprue bushing 104 to serve as a supply channel for molten resin. The sprue 105 is connected to runner grooves formed in the female mold 118 and the male mold 106, and the molding material flows into cavities formed in the female mold 118 and the male mold 106 via this runner groove.

[0013] For the sake of explanation, Figure 1 shows only the sprue bush 104 provided on the fixed mold body 103 side, but in a configuration corresponding to this embodiment, an additional sprue bush corresponding to this embodiment is provided on the contact surface between the movable mold body 102 and the fixed mold body 103.

[0014] In the molding apparatus 10 shown in Fig. 1, after a molding material is poured into the molding spaces (cavities) for forming the runner grooves and each part to form a molded product, the movable mold body 102 is separated from the fixed mold body 103, and the pressing shaft 116 is pressed to move the push-out plate 112, causing the knock-out pin 113 provided on the push-out plate 112 to push out the molded product attached to the male mold 106 that constitutes the movable mold body 102, allowing the molded product to be easily removed. Note that Fig. 1 is a diagram showing an example of the structure of the molding apparatus 10, and the structure of the molding apparatus 10 is not limited to that shown in Fig. 1 and various modifications are possible.

[0015] Next, an example of the configuration of the male mold 106 and female mold 118 corresponding to this embodiment will be described with reference to Figure 2. Here, the male mold 106 and male mold mounting plate 107, and the female mold 118 and female mold mounting plate 119 will be described as being integrally configured. In other words, they are configured so that molding material injection devices can be attached directly to the side surfaces of the male mold 106 and female mold 118. In Figure 2, the male mold 106 and female mold 118 are collectively referred to as the molding die 20.

[0016] Fig. 2(A) is a perspective view showing an example of the appearance of molding die 20. Fig. 2(B) is a plan view of the appearance of molding die 20 as seen from the female die 118 side. A sprue bushing 104 is formed on the surface of molding die 20 facing fixed mounting plate 117 of female die 118. Furthermore, mold components 200 are arranged on four side surfaces of molding die 20 as replaceable parts that can function as sprue bushings for injecting molten molding material from a molding injection device. These side surfaces are perpendicular to the contact surfaces where male die 106 and female die 118 are connected to each other (the surfaces opposite to the surfaces where sprue bushing 104 is formed).

[0017] Mold part 200 consists of mold part 200a fixed to the male mold 106 side and mold part 200b fixed to the female mold 118 side. Each mold part 200 has an opening 201 formed at the center of a recess 202 formed in a hemispherical hat shape to closely contact the tip of the injection nozzle of the molding agent injection device. This opening 201 is connected to the molding space (cavity) inside the mold, allowing molding material to flow through to form a molded product. Mold part 200 is attached to molding die 20 by screws 203 at four points, which serve as attachment members for attaching mold part 200 to molding die 20, and is fixed to molding die 20.

[0018] As shown in FIG. 2(B), the mold part 200 can be disposed at any position on the side surface of the molding die 20. It is also possible that no mold part needs to be disposed on any side surface. The mold part 200 is disposed so as to protrude from the side surface of the molding die 20 by a predetermined thickness. This is to facilitate removal of the mold part 200 from the mold and to ensure the strength of the mold part 200 by ensuring its thickness. For example, half of the mold part 200 may protrude beyond the side surface of the molding die 20.

[0019] FIG. 3 is a diagram showing the appearance of the mold component 200. The mold component 200 can be manufactured using, for example, carbon steel S50C for machine structures. FIG. 3(A) is a perspective view showing an example of the appearance of the front surface of the mold component 200, and FIG. 3(B) is a perspective view showing an example of the appearance of the back surface of the mold component 200. FIG. 3(C) is a diagram showing an example of the structure of the contact surface of the mold component 200a with the mold component 200b, and FIG. 3(D) is a perspective view showing an example of the cross-sectional structure of the mold component 200 taken along plane B-B'. Openings 204a and 204b are formed on the front surfaces of the mold components 200a and 200b, respectively. Openings 205a and 205b are formed on the back surfaces of the mold components 200a and 200b, respectively. As shown in FIG. 3(D), opening 205a is connected to opening 204a, and opening 205b is connected to opening 204b, penetrating the mold component 200. The diameter of opening 205 is smaller than the diameter of opening 204. Note that opening 204 does not have a thread formed therein, but opening 205 does. However, the thread formed in opening 205 does not fit with screw 203 and does not function to secure screw 203. Instead, the thread in opening 205 can be used for removal if mold part 200 is damaged.

[0020] 3(C) is formed on the contact surface 206a that contacts the mold part 200b when the mold part 200a is placed together with the mold part 200b in the molding die. The recess 201a, together with the recess 201b formed on the contact surface 206b (not shown) of the mold part 200b, forms an opening 201 when the mold part 200a and the mold part 200b are combined (contacted at the contact surface 206). The opening 201 is formed so as to penetrate the mold part 200. At this time, the mold parts 200a and 200b have a configuration that is plane-symmetrical with respect to the contact surface 206.

[0021] The dimensions of each of the mold parts 200a, 200b can be, for example, a length L of approximately 50 mm, a width W of 15 mm, and a thickness D of 10 mm. Note that the dimensions of the mold part 200 are not limited to these numerical values ​​and may be any size. The corners of each of the mold parts 200a, 200b are rounded. This is to ensure a gap between the mold part 200 and the recessed part on the molding die 20 where the mold part 200 is attached, so that tools or the like can be inserted when removing the mold part 200.

[0022] Next, the configuration of the molding die 20 side that houses the die part 200 will be described with reference to Fig. 4. Fig. 4(A) is a perspective view showing a schematic configuration of the periphery of the die part 200 of the molding die 20. Fig. 4(B) is a diagram showing an example of the structure of the contact surface of the male die 106 with the female die 118.

[0023] The molding die 20 is formed with a recess 400 for accommodating the die part 200. The recess 400 consists of a recess 400a on the male die 106 side and a recess 400b on the female die 118 side. The recess 400 is formed with an opening 401 that continues (connects) with the opening 201 of the die part 200, and two openings 402 with threads that fit with screws 203 for fixing the die part 200 are arranged in each of the male die 106 and the female die 118.

[0024] 4(B), recess 401a is formed in contact surface 403a where male die 106 comes into contact with female die 118. Recess 401a, together with recess 401b formed in contact surface 403b (not shown) of female die 118, forms opening 401 when male die 106 and female die 118 are combined (brought into contact at contact surface 403). Opening 401 is connected to a molding space (cavity) formed inside molding die 20.

[0025] Next, a method for fixing the mold part 200 to the molding die 20 will be described with reference to FIG. 5. FIG. 5(A) is a cross-sectional view showing an example of a cross-sectional structure taken along the A-A' plane in FIG. 2. FIG. 5(A) shows an enlarged view of the screw 203 and its vicinity. FIG. 5(B) shows the cross-sectional view of FIG. 5(A) with the screw 203 removed. FIG. 5(C) shows an example of the structure of the screw 203. As shown in FIG. 5(C), the screw 203 is composed of a head 203h and a threaded portion 203s. The threaded portion 203s has a first portion (n1) without a thread and a second portion (n2) with a thread. The screw 203 has a so-called "half-thread" structure. The length of the first portion n1 corresponds to the depth of the opening 205a, and the length of the second portion n2 corresponds to the depth of the opening 402.

[0026] A thread (internal thread) corresponding to the thread (external thread) formed on second portion n2 of screw 203 is formed in opening 402, and the thread (internal thread) of opening 402 and the thread (external thread) on second portion n2 of screw 203 fit together, thereby fixing screw 203 to molding die 20. At this time, head 203h of screw 203 presses downward the bottom of opening 204 (corresponding to the difference in diameter between openings 204 and 205), thereby fixing mold part 200 to molding die 20 by screw 203.

[0027] In this embodiment, for example, the thread (external thread) of the second portion n2 of the screw 203 and the thread (internal thread) of the opening 402 can be a metric thread according to JIS B0205:2001 or an M5 thread according to ISO 724:1993 (ISO general-purpose metric screw threads—Basic dimensions). The thread (internal thread) formed in the opening 205 can be, for example, an M6 thread. However, the above M5 and M6 threads are merely examples, and are not limited thereto as long as the diameter of the internal thread of the opening 205 is at least larger than the diameter of the internal thread of the opening 402.

[0028] Thus, in this embodiment, the screw 203 does not engage with the openings 204 and 205 formed in the mold part 200, but only with the opening 402 formed on the mold side. The thread on the opening 205 side can be used to remove the mold part 200 if the mold part 200 is damaged. For example, even if the mold part 200 is stuck in the recess 400 of the molding die 20 and cannot be easily removed even after the screw 203 has been removed, a screw corresponding to the thread of the opening 205 (e.g., M6) can be inserted, and the mold part 200 can be lifted (jacked up) by utilizing the step formed by the difference in diameter between the opening 402 and the opening 205 (shown in an enlarged view of the area surrounded by the dotted line in FIG. 5(B)). Note that in this embodiment, an example has been described in which a thread for auxiliary work (jacking up) is provided on the opening 205 side. However, this is not limited to this, and the opening 205 side may not have a thread.

[0029] Also, as shown in FIG. 5(A), when the mold part 200 is placed in the molding die 20, the contact surface 206 of the mold part 200 and the contact surfaces 403 of the male die 106 and the female die 118 are continuous.

[0030] Next, an example of the configuration of the molding die within molding die 20 corresponding to this embodiment will be described with reference to Fig. 6. Fig. 6 shows the configuration when molding is performed by injecting molding materials of different colors from the center and each of the four side surfaces of molding die 20.

[0031] Molding mold 60 has multiple molding injection ports 600A to 600E, with molding injection port 600A corresponding to sprue bushing 104 and molding injection ports 600B to 600E corresponding to the sprue bushings of mold component 200 in FIG. 2. Molding mold 60 is a molding die having multiple molding spaces (cavities) 602 as part molding portions for forming multiple parts, and each cavity 602 is connected to main runner groove 603 via sub-runner groove 604. When molten molding material is injected from molding material injection port 600A or the like, the molding material flows from main runner groove 603 through sub-runner groove 604 into cavity 602. After all cavities 602 are filled with the molding material, the molding material is cooled to produce a molded product.

[0032] Here, each cavity 602 is associated with one of the molding injection ports 600, and for example, cavity 602 surrounded by dotted line 601A is associated with molding injection port 600A. Similarly, cavity 602 surrounded by dotted line 601B is associated with molding injection port 600B, cavity 602 surrounded by dotted line 601C is associated with molding injection port 600C, cavity 602 surrounded by dotted line 601D is associated with molding injection port 600D, and cavity 602 surrounded by dotted line 601E is associated with molding injection port 600E.

[0033] 6, switches that block the flow of molding material to prevent it from flowing into other cavities are disposed in main runner groove 603 and sub-runner groove 604. This allows the molding material that flows in from molding injection nozzle 600 to fill only cavity 602 that corresponds to that molding injection nozzle 600.

[0034] The molding method using the molding die 60 corresponding to this embodiment is carried out to include a first molding step in which molding material is injected through opening 105 of sprue bushing 104 on the main nozzle side of the injection molding machine to mold a molded product consisting of multiple parts connected to a runner, and a second molding step in which molding material is injected through opening 201 of mold part 200 on the sub-nozzle side of the injection molding machine to mold a molded product consisting of multiple parts connected to a runner.

[0035] According to the molding die corresponding to the above-described embodiment, the sprue bushing, which has previously been engraved directly into the die, can be replaced as the die part 200. As a result, even if a problem occurs during mass production molding, the only work required to deal with it is to replace the die part 200, which avoids the need to dismount and correct the die, thereby significantly improving work efficiency. Specifically, even when multiple die parts 200 are replaced, it takes just under 10 minutes, which is a significant reduction in time compared to the time (2 to 3 hours) required when the sprue bushing is engraved directly into the die.

[0036] <Summary of the embodiment> The above-described embodiments disclose at least the following mold parts, molding molds, and molding methods for molded products.

[0037] (1) A mold part to be placed in a molding mold consisting of a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity, disposed on a side surface of the molding die perpendicular to a contact surface between the first mold and the second mold, a first mold part attached to the first mold; a second mold part attached to the second mold; and Including, a recess is formed on each of the contact surfaces where the first mold part and the second mold part come into contact with each other when they are placed in the molding die, and the recess forms a first opening for injecting the molding material into the molding die when the first mold part and the second mold part are placed in the molding die; The first mold part and the second mold part each have a through hole formed therein through which an attachment member for attachment to the molding die passes.

[0038] (2) A mold part as described in (1), in which a second thread different from the first thread formed on the mounting member is formed in the through hole, and the through hole is configured so as not to fit with the mounting member.

[0039] (3) The mold parts according to (1) or (2), wherein the first mold part and the second mold part have a plane-symmetrical configuration with respect to a contact surface where the first mold part and the second mold part come into contact with each other when placed in the molding die.

[0040] (4) When the first mold part and the second mold part are placed in the molding die, a first contact surface of the first mold part contacts a second contact surface of the second mold part; the first contact surface is continuous with a surface where the first mold contacts the second mold; The mold part according to any one of (1) to (3), wherein the second contact surface is continuous with the surface where the second mold contacts the first mold.

[0041] (5) The first mold part is configured to be able to be placed in a first recess formed in the first mold, the second mold part is configured to be positionable in a second recess formed in the second mold; Mold parts according to any one of (1) to (4), wherein when the first mold part and the second mold part are placed in the first recess and the second recess, respectively, at least a portion of the first mold part and the second mold part protrude from the surface of the first mold on which the first recess is formed and the surface of the second mold on which the second recess is formed, respectively.

[0042] (6) The mounting member is configured as a half screw; A mold part according to any one of (1) to (5), which, when coupled to the molding die, fits only with the molding die.

[0043] (7) The mold part according to any one of (1) to (6), wherein the inner diameter of the through hole is larger than the inner diameter of the coupling hole of the molding mold that is coupled to the mounting member.

[0044] (8) A molding die comprising the die component according to any one of (1) to (7), A first mold and a second mold are provided, a molding die having a second opening on a surface of the first die parallel to a contact surface between the first die and the second die, for injecting the molding material into the molding die;

[0045] (9) The first mold has a first recess that at least partially accommodates the first mold part, the second mold has a second recess that at least partially accommodates the second mold part; the first recess has a first screw hole for fixing the first mold part in a state where the first mold part is at least partially accommodated in the first recess, and the first screw hole has a third screw thread formed therein that corresponds to the first screw thread formed on the mounting member and engages with the mounting member; The molding die described in (8) above, wherein the second recess has a second screw hole for fixing the second mold part in a state where it is at least partially accommodated in the second recess, and the second screw hole has the third screw thread formed therein, which corresponds to the first screw thread and engages with the mounting member.

[0046] (10) A molding die according to (9), wherein a recess is formed on each of the contact surfaces where the first mold and the second mold come into contact with each other, and when the first mold and the second mold are connected and the mold parts are arranged, the recess is continuous with the first opening and forms a third opening for injecting the molding material into the cavity in the molding die.

[0047] (11) A first molding step of injecting a molding material into the molding die according to any one of (8) to (10) through the second opening to mold a molded product having a plurality of parts connected to a runner; a second molding step of injecting a molding material into the molding die through the first opening to mold a molded product formed by connecting a plurality of parts to runners; A method for molding a molded article, comprising:

[0048] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention.

Claims

1. A mold part to be placed in a molding mold, which comprises a first mold and a second mold, for injecting a molding material into a cavity therein to produce a molded product, a first mold part attached to the first mold; a second mold part attached to the second mold; and Including, A recess is formed on each of the contact surfaces where the first mold part and the second mold part come into contact with each other when they are placed in the molding die, and the recess forms a first opening when the first mold part and the second mold part are brought into contact with each other at the contact surfaces; A mold part, wherein each of the first mold part and the second mold part has an attachment portion formed on a surface perpendicular to the contact surface for attachment to the molding mold.

2. 2. The mold part according to claim 1, wherein the first mold part and the second mold part have a plane-symmetric configuration with respect to a contact surface where the first mold part and the second mold part contact each other when placed in the molding die.

3. The first mold part and the second mold part, when the first mold part and the second mold part are placed in the molding die, a first contact surface of the first mold part contacts a second contact surface of the second mold part; the first contact surface is continuous with a surface where the first mold contacts the second mold; The mold part of claim 1 , wherein the second contact surface is continuous with a surface where the second mold contacts the first mold.

4. the first mold part is configured to be positionable in a first recess formed in the first mold; the second mold part is configured to be positionable in a second recess formed in the second mold; 2. The mold part according to claim 1, wherein when the first mold part and the second mold part are disposed in the first recess and the second recess, respectively, at least a portion of the first mold part and the second mold part protrude from a surface of the first mold in which the first recess is formed and a surface of the second mold in which the second recess is formed, respectively.

5. The first mold part and the second mold part are respectively attached to the first mold and the second mold by an attachment member via the attachment portion, The mold part according to claim 1, wherein the mounting portion has a second thread formed thereon that is different from a first thread formed on the mounting member, and the mounting portion is configured not to engage with the mounting member.

6. The mounting member is configured as a half screw; The mold part of claim 5 , wherein the mold part only mates with the molding die when the mold part is coupled to the molding die.

7. The mold part according to claim 5 , wherein an inner diameter of the mounting portion is larger than an inner diameter of a coupling hole of the molding mold that is coupled to the mounting member.

8. A molding tool comprising a mold part according to any one of claims 1 to 7, A first mold and a second mold are provided, A molding die comprising a second opening in the first die for injecting molding material into the molding die.

9. the first mold has a first recess that at least partially receives the first mold part; the second mold has a second recess that at least partially receives the second mold part; the first recess has a first screw hole for fixing the first mold part in a state where the first mold part is at least partially received in the first recess; The molding die of claim 8 , wherein the second recess has a second screw hole for fixing the second die part at least partially received in the second recess.

10. 10. The molding die according to claim 9, wherein a recess is formed in each of the contact surfaces where the first die and the second die are in contact with each other, and the recess is continuous with the first opening when the first die and the second die are connected and the die parts are arranged, and constitutes a third opening for injecting the molding material into the cavity in the molding die.

11. a first molding step of injecting a molding material into the molding die according to claim 8 through the second opening to mold a molded product having a plurality of parts connected to a runner; a second molding step of injecting a molding material into the molding die through the first opening to mold a molded product having a plurality of parts connected to a runner; A method for molding a molded article, comprising the steps of:

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