resin molding die

Abstract

To provide a resin molding die that can remove the gate while suppressing the generation of fine powder. [Solution] The resin molding die 1 is a resin molding die that injects raw material and hardens the raw material in a cavity 2, and comprises a first mold 4 that forms at least a part of the cavity 2, and a second mold 6 that is movable in a first direction X relative to the first mold 4 and forms a supply passage 8 between itself and the first mold 4 for supplying the raw material to the cavity 2 when the mold is closed, the supply passage 8 has a gate opening 10 which is the boundary with the cavity 2, a gate body passage 12 which extends to the gate opening 10 along the parting surface L1 between the first mold 4 and the second mold 6, and a protruding passage 14 which extends from the body passage 12 in a direction intersecting the first direction X.

Description

Technical Field

[0001] This disclosure relates to a resin molding die.

Background Art

[0002] Patent Document 1 discloses a gate cutting device incorporated in a molding die. The gate cutting device includes a cavity formed between a fixed die and a movable die in a mold-closed state, a gate portion for supplying molten resin to the cavity, and a slide cutter for cutting the gate. The slide cutter slides in a state where the fixed die and the movable die are mold-closed, and separates from the resin on the cavity side by pressing or pulling the runner.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a resin molded member manufactured using such a die, fine powder generated by friction between the cut surface of the resin pulled by the slide cutter and the inner surface of the die may adhere. This disclosure provides a resin molding die capable of removing a gate while suppressing the generation of fine powder.

Means for Solving the Problems

[0005] A resin molding die according to one aspect of the present disclosure is a resin molding die for injecting a raw material and curing the raw material in a cavity, comprising: a first mold that forms at least a part of the cavity; and a second mold that is movable in a first direction relative to the first mold and forms a supply passage between itself and the first mold for supplying the raw material to the cavity when the mold is closed, wherein the supply passage has a gate opening which is the boundary with the cavity; a gate body passage that extends along the parting surface between the first mold and the second mold to the gate opening; and a protruding passage that extends from the body passage in a direction intersecting the first direction. Resin molding die. [Effects of the Invention]

[0006] According to this disclosure, it is possible to provide a resin molding die that can remove the gate while suppressing the generation of fine powder. [Brief explanation of the drawing]

[0007] [Figure 1] A side view showing a resin molding die in a closed state. [Figure 2] A cross-sectional view showing section AA in Figure 1. [Figure 3] A cross-sectional view showing the BB cross-section in Figure 1. [Figure 4] An explanatory diagram illustrating a manufacturing method using a resin molding die. [Figure 5] An explanatory diagram illustrating a manufacturing method using a resin molding die. [Figure 6] A cross-sectional view showing the main part of the second embodiment. [Figure 7] A cross-sectional view showing the main part of the third embodiment. [Modes for carrying out the invention]

[0008] Hereinafter, one embodiment of the present disclosure will be described with reference to the drawings. In the following description, the first direction X, the second direction Y, and the third direction Z will be used.

[0009] As shown in Figures 1 to 3, the resin molding die 1 is a resin molding die for injecting raw materials and curing them in the cavity 2. The resin molding die 1 in this embodiment is an injection molding die for molding resin molded members. The raw material is, for example, a thermoplastic resin. The thermoplastic resin can be selected from, for example, ABS resin, polypropylene (PP), polyethylene (PE), ASA resin (Acrylate Sthrene Acrylonitrile), polystyrene (PS), acrylic resin, polycarbonate (PC) resin, polyamide, polyethylene terephthalate (PET), and modified polyphenylene ether (modified PPE).

[0010] As shown in Figure 2, the resin molding die 1 comprises a first mold 4 and a second mold 6 that is movable relative to the first mold 4. The first mold 4 and the second mold 6 are made of aluminum, iron, or other metals. The first mold 4 may be made of the same material as the second mold 6, or it may be made of a different material. In this embodiment, both the first mold 4 and the second mold 6 are made of an iron alloy.

[0011] The first mold 4 has a movable mold 4a and a fixed mold 4b. The movable mold 4a is movable in a second direction Y relative to the fixed mold 4b. When the mold is closed, the movable mold 4a forms a cavity 2 between itself and the fixed mold 4b.

[0012] The second type 6 is a piece that can move in the first direction X in conjunction with or independently of the first type 4. In this embodiment, the second type 6 is positioned between the movable mold 4a and the fixed mold 4b of the first type 4 when the mold is closed, and is slidable in the first direction X relative to the first type 4.

[0013] The second mold 6 forms a supply path 8 between it and the first mold 4 in the mold-closed state. The supply path 8 is a passage for supplying raw materials into the cavity 2 in the mold-closed state. In this embodiment, the second mold 6 forms the supply path 8 between it and the movable mold 4a of the first mold 4.

[0014] The supply path 8 has a gate port 10, a gate body passage 12, and a protruding path 14.

[0015] The gate port 10 is the boundary with the cavity 2. In this embodiment, the cross-sectional area of the gate port 10 in the first direction X and the third direction Z is smaller than the cross-sectional area of the gate body passage 12.

[0016] The gate body passage 12 is formed between the movable mold 4a of the first mold 4 and the second mold 6. The gate body passage 12 includes a first gate passage 121, a second gate passage 122, and a third gate passage 123.

[0017] The first gate passage 121 is continuous with the gate port 10 and extends along the second direction Y. The first gate passage 121 has a first end portion 121a on the gate port 10 side and a second end portion 121b on the side opposite to the first end portion 121a.

[0018] The second gate passage 122 is continuous with the first gate passage 121 and extends along the first direction X. The second gate passage 122 has a third end portion 122a connected to the first end portion 121a of the first gate passage 121 and a fourth end portion 122b on the side opposite to the third end portion 122a.

[0019] The third gate passage 123 is continuous with the second gate passage 122 and extends along the third direction Z. The third gate passage 123 has a fifth end portion 123a connected to the fourth end portion 122b of the second gate passage 122. The third gate passage 123 is arranged on the side opposite to the fixed mold 4b across the second mold 6 in the second direction Y.

[0020] The gate body passage 12 includes a retention portion 124. The retention portion 124 is located at the second end portion 121b of the first gate passage 121.

[0021] The protruding passage 14 projects from the gate body passage 12 toward the interior of the second type 6 and extends in a direction intersecting the first direction X. The protruding passage 14 includes a base portion 14a connected to the gate body passage 12 and a tip portion 14b opposite to the base portion 14a. In this embodiment, the base portion 14a is connected to the first gate passage 121. The tip portion 14b is located on the gate opening 10 side of the base portion 14a in the second direction Y. That is, the protruding passage 14 is inclined with respect to the first direction X such that the distance to the gate opening 10 in the second direction Y decreases as it moves away from the first gate passage 121 (gate body passage 12) in the first direction X.

[0022] The protruding passage 14 is positioned on the gate opening 10 side of the intermediate position between the gate opening 10 and the anchoring section 124. In this embodiment, the anchoring section 124 is located at the second end 121b. The gate body passage 12 has an intersection O, a first distance d1, and a second distance d2. Intersection O is the intersection of the center of the protruding passage 14 (see dashed line) and the center of the first gate passage 121 (see double dashed line). The first distance d1 is the distance in the second direction Y from intersection O to the first end 121a (gate opening 10). The second distance d2 is the distance from the first end 121a (gate opening 10) to the second end 121b of the first gate passage 121. The first distance d1 may be one-third or more and one-half or less of the second distance d2. In this embodiment, the protruding passage 14 protrudes from approximately the center of the first gate passage 121 in the second direction Y, and the first distance d1 is half the second distance d2.

[0023] The protruding passage 14 has a tapered shape. In this embodiment, the width of the protruding passage 14 in the second direction Y gradually decreases from the base 14a to the tip 14b.

[0024] Next, using Figure 3, we will explain the positional relationship between the parting surface PL of the resin molding die 1 and the supply passage 8.

[0025] As shown in Figure 3, the movable mold 4a includes a first cavity surface 41, a first parting surface 42 connected to the first cavity surface 41, and a first concave surface 43 connected to the first parting surface 42 and forming a recess. The fixed mold 4b includes a second cavity surface 44 facing the first cavity surface 41 in the mold closed state, and a second parting surface 45 connected to the second cavity surface 44. The cavity 2 is defined by the first cavity surface 41 and the second cavity surface 44. The second cavity surface 44 forms the design surface of the resin molded member.

[0026] The second mold 6 includes a third parting surface 61 that faces the first parting surface 42 when the mold is closed, a second concave surface 62 that is continuous with the third parting surface 61 and forms a recess, and a fourth parting surface 63 that faces the second parting surface 45 when the mold is closed.

[0027] The supply passage 8 is defined by the first parting surface 42 and the first concave surface 43 of the movable type 4a, and the third parting surface 61 and the second concave surface 62 of the second type 6. In this embodiment, the first gate passage 121, the anchoring section 124 and the protruding passage 14 of the gate body passage 12 are defined by the first parting surface 42 of the movable type 4a and the second concave surface 62 of the second type 6. The second gate passage 122 and the third gate passage 123 of the gate body passage 12 are defined by the first concave surface 43 of the movable type 4a and the third parting surface 61 of the second type 6. As a result, the first gate passage 121, the second gate passage 122 and the third gate passage 123 extend while avoiding the second type 6.

[0028] As described above, the gate body passage 12 of the supply passage 8 is provided along the parting surface L1 between the movable mold 4a and the second mold 6 of the first mold 4, and extends to the gate opening 10. In other words, in this embodiment, the gate body passage 12 of the supply passage 8 does not penetrate each mold (movable mold 4a, fixed mold 4b, and second mold 6) that constitute the resin molding die 1, and the gate opening 10 is not surrounded by a single mold (movable mold 4a, fixed mold 4b, or second mold 6). The gate opening 10 is positioned flush with the second parting surface 45 of the fixed mold 4b and the fourth parting surface 63 of the second mold 6, that is, the parting surface L2 between the fixed mold 4b and the second mold 6 of the first mold 4.

[0029] Next, a method for manufacturing a resin molded member using the resin molding die 1 of this disclosure will be described with reference to Figures 4 and 5.

[0030] The method for manufacturing a resin molded member comprises the steps of: step S1 of preparing a resin molding die 1; step S2 of closing the first mold 4 and the second mold 6 and injecting raw material into the cavity 2 via a supply passage 8; and step S3 of moving the second mold 6 relative to the first mold 4.

[0031] In step S1, a resin molding die 1 is prepared in an open state. Next, in step S2, as shown in Figure 4, the first mold 4 and the second mold 6 are closed to form a cavity 2 and a supply channel 8. Furthermore, heated molten resin raw material is injected into the cavity 2 through the supply channel 8, cooled, and cured. As a result, an intermediate molded product 21 is formed, as shown by the dotted lines in Figure 4.

[0032] The intermediate molded product 21 includes a mold resin portion M cured in the cavity 2 and a gate resin portion G cured in the supply passage 8. The gate resin portion G includes resin G10 cured in the gate opening 10, resin G12 cured in the gate body passage 12, and resin G14 cured in the protruding passage 14. The cross-sectional area of ​​the intermediate molded product 21 in the first direction X and the third direction Z is smallest with resin G10.

[0033] In step S3, as shown in Figure 5(a), the second mold 6 is slid relative to the movable mold 4a. In this embodiment, the second mold 6 is moved parallel to the first direction X (see white arrow). The resin G14 is sandwiched between the second concave surface 62 of the second mold 6 from both sides in the first direction X. Therefore, when the second mold 6 slides in the first direction X, the resin G14 in the protruding passage 14 receives a force Sa along the sliding direction of the second mold 6 (first direction X). As a result, the entire gate resin part G is dragged by the resin G14 in the protruding passage 14 and attempts to move in the first direction X along with the movement of the second mold 6 due to the force Sa.

[0034] The resin G12 includes resin G121 cured in the first gate passage 121, resin G122 cured in the second gate passage 122, and resin G123 cured in the third gate passage 123. Resin G121, together with resin G14, attempts to move (is pulled) in the first direction X. On the other hand, in this embodiment, resins G122 and G123 are sandwiched between the first concave surface 43 of the movable mold 4a from both sides in the first direction X. Therefore, when the second mold 6 slides in the first direction X, resins G122 and G123 attempt to remain in the third gate passage 123. In the case of resin G122, resin G124 cured in the anchoring section 124 attempts to remain in the anchoring section 124.

[0035] On the other hand, the molded resin part M tries to remain between the movable mold 4a and the fixed mold 4b in the closed state. Therefore, a force Sb acts on the molded resin part M in the opposite direction to the first direction X, which is opposed to the force Sa acting on the resin G14 in the protruding passage 14 and consequently the gate resin part G acting on it in the first direction X.

[0036] As a result, the intermediate molded product 21 is subjected to two opposing forces: Sa along the first direction X and Sb in the opposite direction to the first direction X. The stress generated in the intermediate molded product 21 by these forces Sa and Sb is concentrated near the resin G10.

[0037] Furthermore, resin G14 separates from resin G10 in the first direction X and the second direction Y, and also separates from the anchoring portion 124 in the first direction X and the second direction Y. As a result, the entire gate resin portion G attempts to rotate toward the first direction X, with resin G10 and the resin G124 hardened within the anchoring portion 124 as the center of rotation (see arrows C and D).

[0038] As the second mold 6 slides further in the first direction X, the amount of movement of resin G14 in the first direction X increases, and as a result, the stress generated in resin G10 also increases. As shown in Figure 5(b), when the stress generated in resin G10 exceeds a predetermined value, the intermediate molded product 21 breaks near resin G10, and the gate resin part G separates from the molded resin part M. At this time, as described above, resin G124 becomes the center of rotation and rotates (arrow C). As a result, resin G10 is separated as if torn apart by the force of rotational motion including a shear force along the first direction X. Thus, in step S3, the intermediate molded product 21 separates into the molded resin part M and the gate resin part G.

[0039] Furthermore, the end face (cut surface) of the severed gate resin part G moves away from the end of the molded resin part M in the opposite direction to the second direction Y due to the aforementioned rotational movement. That is, the end face of the gate resin part G moves away from the fixed mold 4b of the first mold 4 and the parting surface L2 of the second mold 6 in the opposite direction to the second direction Y. As a result, the gate resin part G moves away from the sliding surface (parting surface L2) of the second mold 6 and the fixed mold 4b. Consequently, the resin molding die 1 can suppress the generation of fine powder due to friction between the end face of the gate resin part G and the second parting surface 45 of the fixed mold 4b.

[0040] Furthermore, as mentioned above, the protruding passage 14 has a tapered shape, so the resin G14 also has a tapered shape. As a result, the resin G14 falls out of the protruding passage 14 as the second mold 6 slides, and the gate resin part G is demolded from the second mold 6. This reduces the number of steps required to remove the gate resin part G from the second mold 6. When the sliding movement of the second mold 6 is completed, the gate resin part G, separated from the molded resin part M, remains on the movable mold 4a of the first mold 4.

[0041] Next, the movable mold 4a of the first type 4 is moved relative to the fixed mold 4b. In this embodiment, the movable mold 4a is moved in parallel along the second direction Y (see black arrow), but it is not limited to this, and the movable mold 4a may also be moved by rotation. As a result, the molded resin part M is demolded from the fixed mold 4b.

[0042] Finally, the molded resin part M is removed from the movable mold 4a to obtain the resin molded member, and the gate resin part G is also removed from the movable mold 4a.

[0043] <Second Embodiment> Next, a second embodiment of the present disclosure will be described with reference to Figure 6. Note that the following description will focus on configurations different from the first embodiment, and redundant explanations will be omitted. As shown in Figure 6, in this embodiment, the first direction is indicated by arrow a. The resin molding die 201 of this embodiment comprises a first mold 204 and a second mold 206. The second mold 206 is movable along the first direction a relative to the first mold 204 (see black arrow).

[0044] A cavity 202 and a supply passage 208 are formed between the first mold 204 and the second mold 206 in the closed state. In this embodiment, the supply passage 208 extends along the parting surface L3 of the first mold 204 and the second mold 206 to the gate opening 210. The supply passage 208 has a gate body passage 212 and a protruding passage 214 protruding from the gate body passage 212. The gate body passage 212 includes a first passage 212a, a second passage 212b extending in a direction intersecting the first direction a, and a retaining portion 2124 located in the second passage 212b. In this embodiment, the retaining portion 2124 has an inverse tapered shape that is a forced-release shape with respect to the first direction a. The protruding passage 214 extends in a direction intersecting the first direction a.

[0045] In this embodiment, after the resin is cured between the closed first mold 204 and the second mold 206, the second mold 206 is moved along the first direction a to open the mold (see black arrow). At this time, the resin G214 cured in the protruding passage 214 is dragged by the second mold 206 and tries to move along the first direction a, while the resin G2124 cured in the retaining section 2124 tries to remain on the first mold 204 side because it takes on a shape that forces it out relative to the first mold 204. As a result, the gate resin section G rotates around the resin G2124 cured in the retaining section 2124 as the second mold 206 moves, and is torn off near the gate opening 210. As a result, the gate resin section G separates from the molded resin section M, and a resin molded member can be obtained.

[0046] <Third Embodiment> Next, a third embodiment of the present disclosure will be described with reference to Figure 7. Note that the following description will focus on configurations different from those of the first and second embodiments, and redundant explanations will be omitted. As shown in Figure 7, in this embodiment, the first direction is the rotational direction along arrow a (see black arrow). The resin molding die 301 of this embodiment comprises a first mold 304 and a second mold 306. The second mold 306 is rotatable relative to the first mold 304 in the direction of arrow a (see black arrow).

[0047] A cavity 302 and a supply passage 308 are formed between the first mold 304 and the second mold 306 in the closed state. In this embodiment, the supply passage 308 extends along the parting surface L4 of the first mold 304 and the second mold 306 to the gate opening 310. The supply passage 308 has a gate body passage 312, a protruding passage 314 protruding from the gate body passage 312, and a retaining portion 3124 positioned in the gate body passage 312. The retaining portion 3124 is positioned on the opposite side of the gate opening 310 from the protruding passage 314 in the direction indicated by arrow c. In this embodiment, the protruding passage 314 extends in the direction intersecting arrows a and c.

[0048] In this embodiment, after the resin is cured between the closed first mold 304 and the second mold 306, the second mold 306 is rotated along arrow a to open the mold (see black arrow). At this time, the resin G314 cured in the protruding passage 314 is dragged by the second mold 306 and tries to move along arrow a, while the resin G3124 cured in the retaining section 3124 tries to remain on the first mold 304 side because it takes on a shape that forces it out relative to the first mold 304. As a result, the gate resin section G rotates around the resin G3124 cured in the retaining section 3124 as the second mold 306 moves, and is torn off near the gate opening 310. As a result, the gate resin section G separates from the molded resin section M, and a resin molded member can be obtained.

[0049] As described above, the resin molding die 1 and the manufacturing method using the resin molding die 1 according to this embodiment can achieve the following effects.

[0050] The resin molding die 1 is a resin molding die for injecting raw material and curing the raw material in a cavity 2, and comprises a first mold 4 that forms at least a part of the cavity 2, and a second mold 6 that is movable in a first direction X relative to the first mold 4 and forms a supply passage 8 between itself and the first mold 4 for supplying the raw material to the cavity 2 when the mold is closed, the supply passage 8 having a gate opening 10 which is the boundary with the cavity 2, a gate body passage 12 that extends to the gate opening 10 along the parting surface L1 between the first mold 4 and the second mold 6, and a protruding passage 14 that extends from the gate body passage 12 in a direction intersecting the first direction X.

[0051] Such a resin molding die 1 forms an intermediate molded product 21 which includes a molded resin part M cured in the cavity 2 and a gate resin part G cured in the supply passage 8. The gate resin part G includes resin G10 cured in the gate opening 10, resin G12 cured in the gate body passage 12, and resin G14 cured in the protruding passage 14. As the second mold 6 moves, resin G14 is dragged in the first direction X, while the molded resin part M tries to remain in the cavity 2. As a result, the resin G10 breaks due to the movement of the second mold 6, and the gate resin part G is separated from the molded resin part M. The gate body passage 12 extends to the gate opening 10 along the parting surface L1 between the first mold 4 and the second mold 6, and does not penetrate each of the molds (movable mold 4a, fixed mold 4b, and second mold 6) that make up the resin molding die 1, and the gate opening 10 is not surrounded by the second mold 6. Therefore, after the gate resin part G and the mold resin part M are separated, the second mold 6 and the end face of the gate resin part G do not rub against each other, thus suppressing the generation of fine powder.

[0052] Furthermore, the protruding passage 14 extends in a direction that approaches the gate opening 10 as it moves away from the gate body passage 12 in the first direction X. This increases the stress generated in the resin G10 compared to when it extends away from the gate opening 10, and even when a configuration is adopted in which the gate opening 10 is not surrounded by the second mold 6, the gate resin part G can be easily separated from the mold resin part M.

[0053] Furthermore, the protruding passage 14 has a tapered shape. As a result, the resin G14 falls out of the protruding passage 14 as the second mold 6 slides, and the gate resin part G is demolded from the second mold 6. This reduces the number of steps required to remove the gate resin part G from the second mold 6.

[0054] Furthermore, the protruding passage 14 is provided in the second type 6, the gate body passage 12 includes a retaining section 124 that holds the resin hardened in the supply passage 8 to the first type 4 side, and the protruding passage 14 protrudes from the gate opening 10 side from an intermediate position between the gate opening 10 and the retaining section 124.

[0055] As a result, even if resin G14 is dragged by the second mold 6, resin G12 can be retained on the first mold 4 side. In this case, as the second mold 6 moves, resin G12 rotates around resin G124 as the center of rotation. Therefore, resin G10 is separated as if torn apart by the force of rotational motion including a shear force along the first direction X. Then, the end face of the molded resin part M rotates and separates from the sliding surface (parting surface L2) of the first mold 4 and the second mold 6. As a result, the resin molding die 1 can suppress the generation of fine powder due to friction between the end face of the molded resin part M and the sliding surface. In addition, since the protruding passage 14 protrudes from the gate opening 10 side, which is an intermediate position between the gate opening 10 and the anchoring portion 124, stress concentration occurs in the resin G10 positioned between the resin G14 that follows the movement of the second type 6 and the molded resin portion M that remains between the first type 4 and the second type 6, allowing for precise separation of the gate resin portion G at the boundary with the molded resin portion M.

[0056] Furthermore, the first mold 4 has a fixed mold 4b and a movable mold 4a that forms the cavity 2 with the fixed mold 4b when the mold is closed and is movable in a second direction Y different from the first direction X relative to the fixed mold 4b, and the gate body passage 12 is provided along the parting surface L1 between the movable mold 4a and the second mold 6 and has a first gate passage 121 that is connected to the gate opening 10 and extends in the second direction Y, and the end of the first gate passage 121 opposite to the gate opening 10 The projecting passage 14 includes a second gate passage 122 connected to and extending in the first direction X, and a third gate passage 123 connected to the end of the second gate passage 122 opposite to the first gate passage 121 (fourth end 122b) and extending in a third direction Z intersecting the first direction X and the second direction Y, wherein the projecting passage 14 projects from the first gate passage 121, and the third gate passage 123 is located in the second direction Y on the opposite side of the second type 6 from the fixed type 4b.

[0057] As a result, when the second mold 6 slides in the first direction X, the resins G122 and G123 in the second gate passage 122 and the third gate passage 123 tend to remain within the second gate passage 122 and the third gate passage 123. On the other hand, the resin G121 in the first gate passage 121 peels off from the movable mold 4a, and a portion of it tries to follow the second mold 6. Therefore, the gate resin part G can be separated from the resin molded member while rotating around the connection point between the first gate passage 121 and the second gate passage 122. As a result, the gate resin part G can be separated from the resin molded member within the resin molding die 1 without providing a supply passage 8 and a gate opening 10 within the movable mold 4a.

[0058] Furthermore, the method for manufacturing a resin molded member comprises: step S1 of preparing a resin molding die 1; step S2 of closing the first mold 4 and the second mold 6 and injecting the raw material into the cavity 2 via the supply passage 8; and step S3 of moving the second mold 6 relative to the first mold 4 in a first direction X, thereby pulling the resin G14 hardened in the protruding passage 14 in the first direction X, and separating the resin G8 hardened in the supply passage 8 from the resin molded member hardened in the cavity 2.

[0059] The method for manufacturing a resin molded member using such a resin molding die 1 forms an intermediate molded product 21 which includes a molded resin part M cured in the cavity 2 and a gate resin part G cured in the supply passage 8. The gate resin part G includes resin G10 cured in the gate opening 10, resin G12 cured in the gate body passage 12, and resin G14 cured in the protruding passage 14. As the second mold 6 moves, resin G14 is dragged in the first direction X, while the molded resin part M tries to remain in the cavity 2. As a result, the resin G10 breaks due to the movement of the second mold 6, and the gate resin part G is separated from the molded resin part M. The gate body passage 12 extends to the gate opening 10 along the parting surface L1 between the first mold 4 and the second mold 6, and does not penetrate each of the molds (movable mold 4a, fixed mold 4b, and second mold 6) that constitute the resin molding die 1, and the gate opening 10 is not surrounded by the second mold 6. Therefore, after the gate resin part G and the mold resin part M are separated, the second mold 6 and the end face of the gate resin part G do not rub against each other, thus suppressing the generation of fine powder.

[0060] Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. In particular, the various modifications described herein can be combined as needed.

[0061] In the first embodiment, a configuration in which 4a is movable and 4b is fixed was shown, but 4a may be fixed and 4b movable. In this case, the supply passage is provided between the second type and the fixed type. [Explanation of symbols]

[0062] 1,201,301: Resin molding die 2,202,302: Cavity 4,204,304: Type 1 4a, 204a, 304a: Movable type 4b,204b,304b: Fixed type 6,206,306: Type 2 8,208,308: Supply route 10,210,310: Gate entrance 12,212,312: Gate main passageway 121: Gate 1 Passage 122: Gate 2 Passageway 123: Gate 3 Passage 124: Detention part L1: Parting surface L2: Parting surface L3: Parting surface L4: Parting surface X: 1st direction Y: Second direction

Claims

1. A resin molding die in which raw materials are injected and the raw materials are cured in a cavity, A first mold forming at least a portion of the cavity, A second mold is movable in a first direction relative to the first mold and forms a supply passage between itself and the first mold in a closed state for supplying the raw material to the cavity, Equipped with, The aforementioned supply channel is The gate opening which is the boundary with the aforementioned cavity, A gate body passage extending along the parting surface between the first type and the second type to the gate opening, The gate has a protruding passage that extends from the gate body passage in a direction intersecting the first direction, Resin molding die.

2. The aforementioned protruding passage extends in a direction that moves away from the gate body passage in the first direction and approaches the gate opening. The resin molding die according to claim 1.

3. The aforementioned protruding passage has a tapered shape. The resin molding die according to claim 1.

4. The aforementioned protruding passage is provided in the second type, The gate body passage includes a retaining section that holds the resin hardened in the supply passage to the first mold side. The aforementioned protruding passage protrudes from the gate opening side from a position midway between the gate opening and the retaining portion. The resin molding die according to claim 1.

5. The aforementioned Type 1 is, Fixed type, The mold has a fixed mold that forms the cavity in a closed state and a movable mold that is movable in a second direction different from the first direction relative to the fixed mold, The aforementioned gate body passageway is It is provided along the parting surface between one of the fixed type and the movable type and the second type, A first gate passage connected to the gate opening and extending in the second direction, A second gate passage is connected to the end of the first gate passage opposite to the gate opening and extends in the first direction, Includes a third gate passage connected to the end of the second gate passage opposite to the first gate passage, and extending in a third direction intersecting the first and second directions, The aforementioned protruding passage protrudes from the first gate passage, The third gate passage is positioned in the second direction on the opposite side of the other type of the fixed type and the movable type, with the second type in between. The resin molding die according to claim 1.

6. A step of preparing a resin molding die according to any one of claims 1 to 5, The process includes closing the first mold and the second mold, and injecting the raw material into the cavity through the supply passage, A step of moving the second mold in the first direction relative to the first mold, thereby pulling the resin hardened in the protruding passage in the first direction, and separating the resin hardened in the supply passage from the resin molded member hardened in the cavity, Equipped with, A method for manufacturing resin molded components.

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