Metal mold device

Abstract

The present invention provides a metal mold device. In the metal mold device (10), during injection molding, the side portion (24) forming the second cavity portion (18b) in the second metal mold (14) is deformed outward in the second direction by the injection pressure, and the insert (16) is displaced along with the deformation of the side portion (24). The drive portion (44) is used to move the insert (16) along a drive direction intersecting the first direction and the second direction so that the insert (16) can move forward and backward between a molding position capable of molding a molded product (300) and a retreat position capable of demolding the molded product (300). The insert (16) is mounted on the drive portion (44) in a swingable manner. Accordingly, burrs on the molded product can be prevented.

Description

Technical Field

[0001] The present invention relates to a metal mold device. Background Art

[0002] The metal mold device, for example, has a fixed mold, a movable mold, and an insert. The fixed mold, the movable mold, and the insert form a mold cavity for injection molding a molded product. The mold cavity includes a first mold cavity portion, a second mold cavity portion, and a third mold cavity portion. The first mold cavity portion extends along a second direction orthogonal to the first direction, wherein the first direction is the mold closing direction of the movable mold. The second mold cavity portion extends from the first mold cavity portion in a direction intersecting the second direction. The third mold cavity portion is located at the end of the second mold cavity portion and molds the undercut part of the molded product.

[0003] The fixed mold molds the outer surface of the molded product. The movable mold molds the inner surface of the molded product. The insert molds the barb portion. In this metal mold device, since the clamping force does not act in the second direction, during injection molding, the side portion of the fixed mold that molds the outer surface of the second cavity portion is deformed outward in the second direction due to the injection pressure. As a result, the molding surface of the side portion (the surface that molds the cavity) is offset relative to the molding surface of the insert (the surface that molds the cavity), sometimes resulting in burrs on the molded product.

[0004] For example, in the mold device described in Japanese Patent Application Publication No. 2020-82598, during injection molding, the side of the fixed mold deforms outward in a second direction due to the injection pressure. This side pushes the insert outward in the second direction, causing the insert to slide. This prevents positional misalignment between the molding surface of the side and the insert, thereby preventing burrs on the molded product. The mold device includes a drive unit that advances and retracts the insert in the second direction. Summary of the Invention

[0005] However, in some mold devices, the drive unit is configured to cause the insert to advance and retreat in a direction intersecting the first and second directions. In this case, because the direction of side deformation during injection molding differs from the direction of insert advance and retreat caused by the drive unit, movement of the insert in the second direction is blocked by the drive unit. In this case, during injection molding, the insert cannot be displaced outward in the second direction accompanied by side deformation.

[0006] The purpose of the present invention is to solve the above technical problems.

[0007] A technical solution of the present invention is: a metal mold device, which is formed by a first metal mold, a second metal mold and an insert to form a mold cavity for injection molding a molded product, the mold cavity having a first mold cavity part, a second mold cavity part and a third mold cavity part, wherein the first mold cavity part extends along a second direction orthogonal to the first direction, wherein the first direction is the mold closing direction of the first metal mold and the second metal mold; the second mold cavity part extends from the first mold cavity part along a direction intersecting the second direction; the third mold cavity part is located at the extended end of the second mold cavity part, and is used to mold the hook part of the molded product, and the first metal mold molds the molded product. The inner surface of the product, the second metal mold molds the outer surface of the molded product, and the insert molds the hook portion. During injection molding, the side portion of the second metal mold forming the second cavity portion is deformed outward in the second direction by injection pressure, and the insert is displaced along with the deformation of the side portion. The metal mold device has a driving portion for moving the insert along a driving direction intersecting the second direction so that the insert can move back and forth between a molding position capable of molding the molded product and a retreat position capable of demolding the molded product, and the insert is mounted on the driving portion in a swingable manner.

[0008] According to the present invention, the insert is swingably mounted to the drive unit. This allows the insert to be displaced outward in the second direction accompanying the deformation of the side portion, even when the direction of side deformation differs from the insert's advance and retreat direction during injection molding. This prevents burrs from forming on the molded product.

[0009] The above-mentioned objects, features and advantages will be easily understood through the following description of the embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a partially omitted longitudinal sectional view of a mold device according to one embodiment of the present invention.

[0011] Figure 2 yes Figure 1 A partially enlarged cross-sectional view of .

[0012] Figure 3 It is along Figure 2 A partially omitted cross-sectional view of III-III.

[0013] Figure 4 This is a first explanatory diagram showing the steps of assembling the insert into the first mold.

[0014] Figure 5 This is a second explanatory diagram showing the steps of assembling the insert into the first mold.

[0015] Figure 6It is a partially omitted longitudinal sectional view of the mold device showing a state in which the insert is tilted. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, the metal mold device 10 according to one embodiment of the present invention is used to mold a molded product 300 (see FIG. Figure 6 ) is injection molded. The molded product 300 is not limited to a vehicle bumper.

[0017] The mold device 10 includes a first mold 12, a second mold 14, and an insert 16. The first mold 12, the second mold 14, and the insert 16 form a cavity 18 for injection molding a molded product 300. The cavity 18 includes a first cavity portion 18a, a second cavity portion 18b, and a third cavity portion 18c.

[0018] The first cavity portion 18a extends in a second direction (arrow X direction) orthogonal to the first direction (arrow Z direction), wherein the first direction is the clamping direction of the first metal mold 12 and the second metal mold 14. The second cavity portion 18b extends from the end of the first cavity portion 18a in a direction intersecting the first and second directions. The third cavity portion 18c extends from the extended end of the second cavity portion 18b toward the inner side of the second direction (arrow X1 direction). The third cavity portion 18c is used for the barb portion 302 (refer to Figure 6 ) space for molding.

[0019] The first mold 12 and the second mold 14 are arranged so as to face each other in a first direction. The first mold 12 is a movable mold, and the second mold 14 is a fixed mold. However, in the mold apparatus 10, the first mold 12 may be a fixed mold, and the second mold 14 may be a movable mold. The second mold 14 is located in the direction indicated by arrow Z1 relative to the first mold 12.

[0020] The first mold 12 is movable relative to the second mold 14 in a mold closing direction (arrow Z1 direction) and a mold opening direction (arrow Z2 direction). The first mold 12 molds the inner surface of the molded article 300. The first mold 12 has a first inner molding surface 20a, a second inner molding surface 20b, and a third inner molding surface 20c.

[0021] The second mold 14 molds the outer surface of the molded article 300. The second mold 14 has a first outer molding surface 22a and a second outer molding surface 22b. When the first and second molds 12 and 14 are in the clamped state (hereinafter referred to as the "clamped state"), the first outer molding surface 22a and the first inner molding surface 20a face each other, forming a first cavity 18a. The second outer molding surface 22b and the second inner molding surface 20b face each other in the clamped state, forming a second cavity 18b.

[0022] The second metal mold 14 includes a side portion 24 that forms the second cavity portion 18b. The side portion 24 has a second outer molding surface 22b. A fitting recess 26 is formed on the side portion 24, recessed in the direction indicated by arrow Z1. The fitting recess 26 is shaped so that its width narrows as it approaches the direction indicated by arrow Z1. In other words, the width of the fitting recess 26 along the direction indicated by arrow X narrows as it approaches the direction indicated by arrow Z1.

[0023] The insert 16 has a first molding surface 28a and a second molding surface 28b. The first molding surface 28a is configured to be connected to the second outer molding surface 22b without a step difference in the mold clamping state. The first molding surface 28a and the second outer molding surface 22b together mold the outer surface (exterior surface) of the molded product 300. The first molding surface 28a forms the boundary between the second cavity portion 18b and the third cavity portion 18c. The second molding surface 28b extends from the first molding surface 28a inward in the second direction (direction of arrow X1). The second molding surface 28b and the third inner molding surface 20c form the third cavity portion 18c.

[0024] like Figure 2 and Figure 3 As shown, the insert 16 includes an insert body 30, a fitting protrusion 32, and a connecting portion 34. The insert body 30 extends in a third direction (driving direction, direction of arrow Y) perpendicular to the first and second directions.

[0025] A recess 35 is formed on the surface of the insert body 30 facing the inner side in the second direction (the surface facing the first metal mold 12). The recess 35 includes a first groove 36 and a second groove 38. The first groove 36 extends in the direction of the arrow Y. The first groove 36 is located in the middle part of the insert 16 in the direction of the arrow Z. The cross-sectional shape of the first groove 36 is, for example, a quadrilateral (see Figure 2 ).

[0026] The second groove 38 is formed on the groove bottom surface 36a of the first groove 36. The second groove 38 extends along the entire length of the first groove 36. The cross-sectional shape of the second groove 38 is, for example, a quadrilateral. The groove width (length along the arrow Z direction) of the second groove 38 is narrower than the groove width (length along the arrow Z direction) of the first groove 36.

[0027] exist Figure 2 In the embodiment shown in FIG. 1 , a through hole 40 is formed on the groove bottom surface 38a of the second groove 38, extending linearly in the direction indicated by the arrow X. The through hole 40 opens on the surface of the insert body 30 that faces outward in the second direction (the direction indicated by the arrow X2). The through hole 40 is a hole used to attach a guide member 46, described later, to the first mold 12.

[0028] The fitting protrusion 32 protrudes in the arrow Z1 direction from the surface of the insert body 30 facing the arrow Z1 direction. In the mold clamping state, the fitting protrusion 32 fits into the fitting recess 26 of the second mold 14. The fitting protrusion 32 is formed so as to become narrower in width as it approaches the arrow Z1 direction.

[0029] exist Figure 3 In the embodiment, the connection portion 34 is located at the end portion of the insert body 30 in the third direction. A connection hole 42 is formed in the connection portion 34. The connection holes 42 include a first connection hole 42a and a second connection hole 42b. The first connection hole 42a is a circular hole extending in the direction indicated by arrow Y. The first connection hole 42a opens on the surface of the connection portion 34 opposite to the insert body 30. The second connection hole 42b is a circular hole that communicates with the end portion of the first connection hole 42a that is closer to the insert body 30. The inner diameter of the second connection hole 42b is larger than that of the first connection hole 42a.

[0030] like Figure 2 and Figure 3 As shown in FIG. 1 , the metal mold device 10 further includes a driving portion 44, a guide member 46, and a support member 48. Figure 3 In the embodiment, the drive unit 44 moves the insert 16 along the third direction (a direction intersecting the first and second directions) so that the insert 16 can advance and retreat between a molding position where the molded product 300 can be molded and a retreat position where the molded product 300 can be demolded.

[0031] The drive unit 44 is, for example, a pneumatic cylinder device. However, the drive unit 44 may also be an electric cylinder device. The drive unit 44 includes a cylinder body 50 and a rod 52. The cylinder body 50 is fixed to the first metal mold 12 via a mounting member (not shown). The cylinder body 50 has a cylinder hole (not shown) that allows a piston (not shown) to slide in the direction of arrow Y.

[0032] The rod 52 is inserted into the connection hole 42. Specifically, the rod 52 includes a first rod 52a and a second rod 52b. The first rod 52a is inserted into the first connection hole 42a. The first rod 52a extends in the direction of arrow Y. The first rod 52a is formed in a cylindrical shape, for example.

[0033] The end of the first rod portion 52a facing away from the insert body 30 is connected to a piston (not shown) of the cylinder portion 50. The outer diameter of the first rod portion 52a is smaller than the inner diameter of the first connecting hole 42a. In other words, a first gap S1 is formed between the outer circumferential surface of the first rod portion 52a and the inner circumferential surface of the first connecting hole 42a.

[0034] The second rod portion 52b is inserted into the second connecting hole 42b. The second rod portion 52b is formed into a cylindrical shape, for example. The diameter of the second rod portion 52b is larger than the diameter of the first rod portion 52a. In other words, the second rod portion 52b protrudes radially outward relative to the first rod portion 52a.

[0035] The outer diameter of the second rod portion 52b is larger than the inner diameter of the first connecting hole 42a and smaller than the inner diameter of the second connecting hole 42b. In other words, a second gap S2 is formed between the outer circumferential surface of the second rod portion 52b and the inner circumferential surface of the second connecting hole 42b. The first gap S1 and the second gap S2 are set to a size that allows the insert 16 to tilt (rotate) relative to the drive unit 44 along the circumferential direction of the rod portion 52.

[0036] like Figure 2 and Figure 3 As shown in FIG. 1 , the guide member 46 guides the insert 16 along the third direction (arrow Y direction). The guide member 46 is fixed to the first metal mold 12. The guide member 46 extends along the arrow Y direction. Figure 2 In FIG, the guide member 46 has a T-shaped cross-sectional shape. The guide member 46 is made of, for example, a metal material.

[0037] The guide member 46 is mounted on a mounting surface 56 of the first mold 12 via a plurality of fastening members 54. The mounting surface 56 faces the direction of arrow X2. The fastening members 54 are, for example, bolts. The mounting surface 56 has fastening holes 58 formed therein for screwing the fastening members 54. The guide member 46 also has a plurality of insertion holes 60 formed therein for inserting the fastening members 54. The guide member 46 has an engaging portion 62 and an extending portion 64.

[0038] The engaging portion 62 is disposed within the second groove 38. The engaging portion 62 has a cross-sectional shape, for example, that is rectangular and extends in the direction indicated by arrow Z. The extension portion 64 extends from the engaging portion 62 toward the mounting surface 56. The extension portion 64 has a cross-sectional shape, for example, that is rectangular and extends in the direction indicated by arrow X. The end of the extension portion 64 in the direction indicated by arrow X1 contacts the mounting surface 56. The engaging portion 62 protrudes further in the directions indicated by arrow Z1 and arrow Z2 than the extension portion 64.

[0039] The pair of outer side surfaces 62a of the engaging portion 62 in the direction of arrow Z face the pair of groove side surfaces 38b of the second groove 38. The pair of first outer surfaces 62b of the engaging portion 62 in the direction of arrow X1 face the support member 48. The second outer surface 62c of the engaging portion 62 in the direction of arrow X2 faces the groove bottom surface 38a of the second groove 38. A predetermined gap is formed between the second outer surface 62c and the groove bottom surface 38a.

[0040] For example, a reinforcing member 65 is embedded in the outer side surface 62a and the first outer surface 62b. The reinforcing member 65 is made of graphite, for example. This prevents the guide member 46 from being easily worn. However, a reinforcing material harder than the material constituting the guide member 46 may be applied to the outer side surface 62a and the first outer surface 62b. Figures 1 to 4, for convenience, the gap between the outer side surface 62a and the groove side surface 38b and the gap between the second outer surface 62c and the groove bottom surface 38a are exaggeratedly shown.

[0041] The support member 48 supports the insert 16 on the guide member 46 so that the insert 16 can tilt about the rod 52 in the circumferential direction of the rod 52. The support member 48 includes a pair of support bodies 66. The pair of support bodies 66 are arranged in the first groove 36 in a state separated from each other in the direction indicated by arrow Z. The extension portion 64 of the guide member 46 is inserted into the gap between the pair of support bodies 66.

[0042] The gap between the pair of support bodies 66 is narrower than the length of the guide member 46 in the direction indicated by arrow Z. The support bodies 66 are formed into a plate-like shape, for example, from a metal material. The support bodies 66 cover the first outer surface 62b of the engaging portion 62 disposed in the second groove 38 from the direction indicated by arrow X1. The pair of support bodies 66 prevent the engaging portion 62 from being disengaged from the second groove 38.

[0043] The support body 66 is formed with a plurality (e.g., two) of stepped holes 70 for inserting a plurality of fixing members 68. The fixing members 68 are used to attach the support body 66 to the insert body 30. The fixing members 68 are bolts having a head 72 and a shaft 74. The outer diameter of the head 72 is larger than that of the shaft 74. The shaft 74 screws into a fixing hole 76 formed in the groove bottom surface 36a of the first groove 36.

[0044] The plurality of stepped holes 70 are separated from each other in the direction of arrow Y (see Figure 3 The stepped hole 70 includes a large-diameter hole 70a and a small-diameter hole 70b. The large-diameter hole 70a opens on the outer surface of the support member 48 in the direction of arrow X1. The small-diameter hole 70b opens on the outer surface of the support body 66 in the direction of arrow X2. The large-diameter hole 70a is connected to the small-diameter hole 70b. The large-diameter hole 70a and the small-diameter hole 70b are coaxially arranged. The head portion 72 of the fixing member 68 is arranged in the large-diameter hole 70a. The shaft portion 74 of the fixing member 68 is inserted through the small-diameter hole 70b.

[0045] An annular elastic member 78 is mounted in the large-diameter hole 70a. The elastic member 78 is preferably made of a soft resin material such as polyurethane. The elastic member 78 has a hole 80 through which the shaft 74 of the fixing member 68 is inserted. The support body 66 is attached to the insert body 30 via the fixing member 68 and the elastic member 78.

[0046] Next, the installation of the insert 16 to the first metal mold 12 will be described. Figure 4As shown, first, the guide member 46 and the support member 48 are assembled to the insert 16. Specifically, with the engaging portion 62 of the guide member 46 positioned within the second groove 38 of the insert body 30 and the pair of support bodies 66 positioned within the first groove 36, the support bodies 66 are fixed to the insert body 30 via the elastic members 78 using the plurality of fixing members 68. Thus, the insert 16, the support member 48, and the guide member 46 are integrated.

[0047] Then, if Figure 5 As shown, the guide member 46 is fixed to the mounting surface 56 of the first mold 12. Specifically, with the through-hole 60 of the guide member 46 aligned with the fastening hole 58 of the mounting surface 56, the fastening member 54 is passed through the through-hole 60 of the guide member 46 from the through-hole 40 of the insert body 30 and fastened to the fastening hole 58. This allows the insert 16 to be easily mounted on the first mold 12.

[0048] Next, the steps for injection molding the molded article 300 using the mold assembly 10 will be described. Initially, the insert 16 is located in the molding position. First, the first mold 12 is moved in the mold closing direction, i.e., the first direction (arrow Z1). This allows the mating protrusion 32 of the insert 16 to be inserted into the mating recess 26 of the second mold 14.

[0049] When the first mold 12 is closed, a cavity 18 is formed between the first mold 12, the second mold 14, and the insert 16 (see Figure 1 ). Thereafter, molten resin is injected into the cavity 18 from a sprue (not shown) of the second metal mold 14. Thus, the cavity 18 is filled with the molten resin.

[0050] At this time, the molten resin filled in the second cavity portion 18b exerts an injection pressure in the second direction (the direction of arrow X2) on the side portion 24 of the second metal mold 14. Figure 6 As shown, the side portion 24 deforms to expand in the direction indicated by arrow X2. In other words, the position of the second outer molding surface 22b of the side portion 24 shifts in the direction indicated by arrow X2. As the side portion 24 deforms in the direction indicated by arrow X2, the engaging protrusion 32 is pressed in the direction indicated by arrow X2 by the side portion 24. This forces the insert 16 to rotate about the rod 52. Consequently, the insert 16 tilts in the direction indicated by arrow X2 relative to the guide member 46 and the drive portion 44.

[0051] exist Figure 6The tilting angle of the insert 16 is exaggerated in the figure, but in reality, the tilting angle is quite small. Specifically, the connecting portion 34 of the insert 16 rotates relative to the rod 52 of the drive portion 44 along the circumferential direction of the rod 52. Furthermore, at this time, the elastic member 78 is pressed by the head 72 of the fixing member 68, causing it to compress and deform. This allows the insert 16 to tilt smoothly relative to the guide member 46.

[0052] When the insert 16 tilts, the first molding surface 28a deflects in the direction indicated by arrow X2, thereby preventing the formation of a step between the second outer molding surface 22b and the second molding surface 28b. In other words, the formation of a step on the outer surface (design surface) of the molded article 300 can be suppressed. Consequently, the formation of burrs associated with deformation of the side portion 24 can be prevented.

[0053] When the molten resin filled in the cavity 18 solidifies, the first mold 12 is moved in the mold opening direction, i.e., the direction indicated by arrow Z2. Subsequently, the insert 16 is retracted from the molding position to the retracted position along the direction indicated by arrow Y. This allows the molded product 300 to be released from the first mold 12.

[0054] According to this embodiment, the insert 16 is swingably mounted on the drive unit 44. Thus, even if the direction in which the side portion 24 deforms and the direction in which the insert 16 advances and retreats differ during injection molding, the insert 16 can be displaced outward in the second direction accompanying the deformation of the side portion 24. Consequently, the formation of burrs on the molded product 300 can be prevented.

[0055] The insert 16 tilts relative to the driving portion 44 as the side portion 24 deforms.

[0056] According to such a configuration, by tilting the insert 16 relative to the drive portion 44 , the first molding surface 28 a can be efficiently displaced in the direction of the arrow X2 .

[0057] The drive portion 44 includes a rod portion 52 extending in the third direction (drive direction). The insert 16 includes a connection hole 42 for inserting the rod portion 52. A first gap S1 and a second gap S2 are provided between the outer circumferential surface of the rod portion 52 and the inner circumferential surface of the connection hole 42 to allow the insert 16 to tilt along the circumferential direction of the rod portion 52.

[0058] According to such a configuration, the connection structure between the insert 16 and the driving portion 44 can be simplified.

[0059] The mold apparatus 10 includes a guide member 46 and a support member 48. The guide member 46 is mounted on the mounting surface 56 of the first mold 12 and guides the insert 16 in the forward and backward directions (driving directions) of the insert 16. The support member 48 supports the insert 16 on the guide member 46 so that the insert 16, which is pressed by the side portion 24 during injection molding, can tilt.

[0060] According to such a configuration, the insert 16 can be smoothly advanced and retreated in the third direction without the guide member 46 hindering the tilting of the insert 16 .

[0061] The surface of the insert 16 facing the mounting surface 56 is formed with a recessed portion 35 (a first groove 36 and a second groove 38). The guide member 46 includes an engaging portion 62 inserted into the second groove 38 and an extending portion 64 extending from the engaging portion 62 toward the mounting surface 56. The engaging portion 62 protrudes further in the first direction than the extending portion 64. The support member 48 is attached to the insert 16 so as to be positioned between the engaging portion 62 and the first mold 12. The guide member 46 is fastened to the mounting surface 56 by the fastening member 54.

[0062] According to such a configuration, the insert 16 can be easily mounted in a state where the insert 16 is slidable with respect to the mounting surface 56 of the first mold 12 .

[0063] The support member 48 includes a fixing member 68 and an elastic member 78 . The fixing member 68 is used to fix the support body 66 to the insert 16 , and the elastic member 78 is interposed between the fixing member 68 and the support body 66 .

[0064] According to such a configuration, when the insert 16 tilts relative to the drive portion 44 , the elastic member 78 can be elastically deformed, thereby suppressing an excessive force from being applied from the insert 16 to the guide member 46 .

[0065] The metal mold device involved in the present invention can also be constructed so that when the side of the second metal mold is deformed by the injection pressure, the insert pressed by the side slides toward the outside in the second direction relative to the driving part (rod part) and the guide part (the insert does not tilt but moves in the second direction).

[0066] In addition, the present invention is not limited to the above-described embodiment, and various structures can be adopted without departing from the gist of the present invention.

[0067] This embodiment discloses the following contents.

[0068] The above embodiment discloses a metal mold device, which is formed by a first metal mold (12), a second metal mold (14) and an insert (16) to form a mold cavity (18) for injection molding a molded product (300), wherein the mold cavity has a first mold cavity part (18a), a second mold cavity part (18b) and a third mold cavity part (18c), wherein the first mold cavity part (18a) extends along a second direction orthogonal to the first direction, wherein the first direction is a mold closing direction of the first metal mold and the second metal mold; the second mold cavity part (18b) extends from the first mold cavity part along a direction intersecting the second direction; the third mold cavity part (18c) is located at the extended end of the second mold cavity part and is used to mold the barb of the molded product Part (302), the first metal mold molds the inner surface of the molded product, the second metal mold molds the outer surface of the molded product, and the insert molds the hook portion. During injection molding, the side portion (24) forming the second cavity portion in the second metal mold is deformed toward the outside of the second direction by injection pressure, and the insert is displaced along with the deformation of the side portion. The metal mold device (10) has a driving portion (44) for moving the insert along a driving direction intersecting the second direction so that the insert can move back and forth between a molding position capable of molding the molded product and a retreat position capable of demolding the molded product. The insert is mounted on the driving portion in a swingable manner.

[0069] In the above-mentioned metal mold device, the insert may be tilted relative to the driving portion in accordance with deformation of the side portion.

[0070] In the above-mentioned metal mold device, it may be that: the driving part has a rod part (52) extending along the driving direction, the insert has a connecting hole (42) for inserting the rod part, and a gap (S1, S2) is provided between the outer peripheral surface of the rod part and the inner peripheral surface of the connecting hole so that the insert can tilt along the circumference of the rod part.

[0071] In the metal mold device, it may be that: the metal mold device has a guide component (46) and a support component (48), wherein the guide component (46) is installed on the installation surface (56) of the first metal mold and guides the insert along the driving direction; the support component (48) supports the insert on the guide component in a manner that allows the insert pushed by the side during the injection molding to tilt.

[0072] In the above-mentioned metal mold device, it may be that: a recess (35) is formed on the surface of the insert facing the mounting surface, the guide component has a snap-fit ​​portion (62) and an extension portion (64), wherein the snap-fit ​​portion (62) is inserted into the recess; the extension portion (64) extends from the snap-fit ​​portion toward the mounting surface, and the snap-fit ​​portion protrudes further toward the first direction than the extension portion, the support component has a support body (66), and the support body (66) is installed on the insert in a manner of being located between the snap-fit ​​portion and the first metal mold, and the guide component is fastened to the mounting surface by a fastening component (54).

[0073] In the metal mold device, the supporting component may include a fixing component (68) and an elastic component (78), wherein the fixing component (68) is used to fix the supporting body to the insert; and the elastic component (78) is interposed between the fixing component and the supporting body.

Claims

1. A metal mold device (10) comprising a first metal mold (12), a second metal mold (14), and an insert (16) to form a mold cavity (18) for injection molding a molded product (300). The mold cavity comprises a first mold cavity portion (18a), a second mold cavity portion (18b) and a third mold cavity portion (18c), wherein: The first cavity portion (18a) extends along a second direction orthogonal to the first direction, wherein the first direction is a clamping direction of the first metal mold and the second metal mold; The second cavity portion (18b) extends from the first cavity portion along a direction intersecting the second direction; The third cavity portion (18c) is located at the extended end portion of the second cavity portion and is used to form the barb portion (302) of the molded product. The first metal mold shapes the inner surface of the molded product, The second metal mold shapes the outer surface of the molded product, The insert molding of the barb portion, During injection molding, the side portion (24) forming the second cavity portion in the second metal mold is deformed outward in the second direction by injection pressure, and the insert is displaced along with the deformation of the side portion. The metal mold device is characterized in that A driving portion (44) is provided for moving the insert along a driving direction intersecting the second direction so that the insert can advance and retreat between a molding position capable of molding the molded product and a retreat position capable of demolding the molded product. The insert is swingably mounted on the driving portion.

2. The metal mold device according to claim 1, characterized in that The insert tilts relative to the driving portion as the side portion deforms.

3. The metal mold device according to claim 2, characterized in that The driving portion has a rod portion (52) extending along the driving direction, The insert has a connecting hole (42) for inserting the rod. A gap (S1, S2) is provided between the outer peripheral surface of the rod portion and the inner peripheral surface of the connecting hole so that the insert can tilt along the circumferential direction of the rod portion.

4. The metal mold device according to any one of claims 1 to 3, characterized in that The metal mold device has a guide member (46) and a support member (48), wherein: The guide member (46) is mounted on the mounting surface (56) of the first metal mold and guides the insert along the driving direction; The support member (48) supports the insert on the guide member in such a manner that the insert pressed by the side portion during the injection molding can tilt.

5. The metal mold device according to claim 4, characterized in that A recess (35) is formed on the surface of the insert facing the mounting surface. The guide component has a snap-fit ​​portion (62) and an extending portion (64), wherein: The engaging portion (62) is inserted into the recess; The extension portion (64) extends from the engaging portion toward the mounting surface. The engaging portion protrudes further in the first direction than the extending portion. The support member has a support body (66) which is mounted on the insert so as to be located between the engaging portion and the first metal mold. The guide component is fastened to the mounting surface via a fastening component (54).

6. The metal mold device according to claim 5, characterized in that The supporting member comprises a fixing member (68) and an elastic member (78), wherein: The fixing member (68) is used to fix the supporting body to the insert; The elastic member (78) is interposed between the fixing member and the supporting body.

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