Resin molded article and method for producing resin molded article

Abstract

The resin molded article has a first molded part and a second molded part. The first molded part has a member serving as an insert and a first resin part integrated with the member. The second molded part has a second resin part. The first resin portion includes a first surface, a second surface, a third surface, and a fourth surface. The second resin portion is in contact with all of the first surface, the second surface, the third surface, and the fourth surface of the first resin portion.

Description

Technical Field

[0001] The present invention relates to a resin molded product and a method for producing the resin molded product. Background Art

[0002] For example, resin molded products including connectors are known. The resin molded product disclosed in Patent Document 1 includes components such as connector terminals and a resin housing that is integrated with the connector terminals. The housing has a mating portion for a mating connector connected to the connector terminals. Such resin molded products are manufactured by injection molding components such as connector terminals as inserts.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2022-51061 Summary of the invention

[0006] Problems to be solved by the invention

[0007] Among the resin molded products described above, there are multiple resin molded products with different shapes of connector terminals but the same other parts, or multiple resin molded products with different shapes of fitting parts but the same other parts. In order to manufacture them, multiple molds are required for each resin molded product. The shapes of the multiple molds are slightly different in part, while most of the shapes are the same. In the case where there are multiple parts such as connector terminals or fitting parts, the manufacture and management of multiple molds require a lot of expenses.

[0008] Therefore, an object of the present invention is to provide a resin molded product capable of reducing mold cost and a method for producing such a resin molded product.

[0009] Means for solving problems

[0010] Regarding the resin molded article of the present disclosure, The resin molded product has a first molded portion and a second molded portion, The first molded portion includes a component as an insert and a first resin portion integral with the component. The second molded portion has a second resin portion, The first resin portion includes a first surface, a second surface, a third surface, and a fourth surface. The first surface is annular, The second surface is a surface including a normal line of the first surface, The second surface is annular along the first surface, The second surface is arranged adjacent to the first surface, The third surface is concave in the normal direction of the first surface, The third surface is annular along the first surface, The third surface is arranged adjacent to the first surface on a side opposite to the second surface, The fourth surface is concave in the normal direction of the second surface, The fourth surface is annular along the second surface, The fourth surface is arranged adjacent to the second surface on a side opposite to the first surface, setting a distance between the second surface and the third surface along the first surface in a normal direction of the second surface to be a first distance, setting the distance between the first surface and the fourth surface along the second surface in the normal direction of the first surface to be a second distance, a distance between the first surface and a position of the third surface farthest from the first surface along the third surface in the normal direction of the first surface as a third distance, a distance between the second surface and a position of the fourth surface farthest from the second surface along the fourth surface in a normal direction of the second surface as a fourth distance, The fourth distance has a relationship of 1 / 3≤the fourth distance / the first distance≤9 / 10 with respect to the first distance, The third distance has a relationship of 1 / 3≤the third distance / the second distance≤9 / 10 with respect to the second distance, The first distance is related to the second distance by 2 / 5≤the first distance / the second distance≤5 / 2, The second resin portion is in contact with all of the first surface, the second surface, the third surface, and the fourth surface of the first resin portion.

[0011] The method for producing a resin molded product disclosed in the present invention is the method for producing the above-mentioned resin molded product, wherein: The method for producing the resin molded article comprises: A preparation step of placing the first forming part in a mold; a molding step of supplying molten resin to the mold to mold the second molded portion; and The demolding step is to remove the resin molded product in which the first molded part and the second molded part are integrated from the mold when the molten resin is solidified.

[0012] Effects of the Invention

[0013] According to the resin molded product and the manufacturing method thereof disclosed in the present invention, even if there are multiple types of resin molded products, the huge costs associated with the manufacturing and management of multiple molds can be suppressed. According to the resin molded product disclosed in the present invention, the sealing between the first resin part and the second resin part is good, and it is not easy for moisture to penetrate into the gap between the first resin part and the second resin part from the external space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view showing an example of a resin molded product.

[0015] Figure 2 This is a diagram for explaining a method for producing a resin molded product.

[0016] Figure 3 This is a diagram for explaining the preparation process for secondary injection molding.

[0017] Figure 4 This is a diagram for explaining the molding process of the secondary injection molding.

[0018] Figure 5 This is a cross-sectional view of a portion of a resin molded product.

[0019] Figure 6 This is an explanatory diagram of a resin molded product after secondary injection molding.

[0020] Figure 7 It is a three-dimensional view of the first molding part.

[0021] Figure 8 It is a magnified representation Figure 5 A cross-sectional view of a portion of. DETAILED DESCRIPTION

[0022] <Overview of Embodiments of the Invention Disclosed>

[0023] Hereinafter, embodiments of the present invention will be described by listing them in outline.

[0024] (1A) The resin molded article of the present disclosure, wherein: The resin molded product has a first molded portion and a second molded portion, The first molded portion includes a component as an insert and a first resin portion integral with the component. The second molded portion has a second resin portion, The first resin portion includes a first surface, a second surface, a third surface, and a fourth surface. The first surface is annular, The second surface is a surface including a normal line of the first surface, The second surface is annular along the first surface, The second surface is arranged adjacent to the first surface, The third surface is concave in the normal direction of the first surface, The third surface is annular along the first surface, The third surface is arranged adjacent to the first surface on a side opposite to the second surface, The fourth surface is concave in the normal direction of the second surface, The fourth surface is annular along the second surface, The fourth surface is arranged adjacent to the second surface on a side opposite to the first surface, setting a distance between the second surface and the third surface along the first surface in a normal direction of the second surface to be a first distance, setting the distance between the first surface and the fourth surface along the second surface in the normal direction of the first surface to be a second distance, a distance between the first surface and a position of the third surface farthest from the first surface along the third surface in the normal direction of the first surface as a third distance, a distance between the second surface and a position of the fourth surface farthest from the second surface along the fourth surface in a normal direction of the second surface as a fourth distance, The fourth distance has a relationship of 1 / 3≤the fourth distance / the first distance≤9 / 10 with respect to the first distance, The third distance has a relationship of 1 / 3≤the third distance / the second distance≤9 / 10 with respect to the second distance, The first distance is related to the second distance by 2 / 5≤the first distance / the second distance≤5 / 2, The second resin portion is in contact with all of the first surface, the second surface, the third surface, and the fourth surface of the first resin portion.

[0025] According to the resin molded product disclosed herein, even if there are multiple types of resin molded products, the huge costs associated with the manufacture and management of multiple molds can be suppressed. According to the resin molded product disclosed herein, the sealing between the first resin part and the second resin part is good, and moisture is not easy to penetrate into the gap between the first resin part and the second resin part from the external space.

[0026] If the second molded part is molded by injection molding using the first molded part as an insert, the bonding strength and sealing between the first molded part and the second molded part become issues. Due to the infiltration of moisture in the air, the first resin part, the second resin part and the insert are degraded by corrosion.

[0027] The resin molded article of the present disclosure can solve these problems.

[0028] (2A) The method for producing a resin molded product disclosed herein is the method for producing a resin molded product described in (1A) above, wherein: The method for producing the resin molded article comprises: A preparation step of placing the first forming part in a mold; a molding step of supplying molten resin to the mold to mold the second molded portion; and The demolding step is to remove the resin molded product in which the first molded part and the second molded part are integrated from the mold when the molten resin is solidified.

[0029] According to the manufacturing method of the resin molded product disclosed in the present invention, when the shapes of the components of the first molded part or the part of the first resin part surrounding the above-mentioned components are various, it is sufficient to change the mold used for molding the first molded part. The mold used for molding the second molded part can be universal. Therefore, the mold cost can be reduced. The strength between the first resin part and the second resin part and the sealing between the two can be improved.

[0030] (1B) From another viewpoint, the resin molded article of the present disclosure includes: A first molded portion having a component as an insert and a first resin portion integral with the component; and A second molding part is integrated with the first molding part as an insert, The second molded portion includes a second resin portion covering at least a peripheral portion of the first resin portion. As a bonding interface between the first resin portion and the second resin portion, there is: First interface; an annular second interface having a surface that is continuous from an edge of the entire circumference of the first interface and intersects the first interface; a first concave interface, recessed from the first interface; and a second concave interface, recessed from said second interface, The first concave interface is formed in a ring shape along the edge area of ​​the first interface, The second concave interface is formed in a ring shape along the second interface within a range overlapping with the edge region.

[0031] According to the resin molded product, when the shapes of the components of the first molded part or the part of the first resin part surrounding the components vary, it is sufficient to change the mold used for molding the first molded part. The mold used for molding the second molded part can be universal. Therefore, the mold cost can be reduced compared with the past.

[0032] When the second molded part is molded by injection molding using the first molded part as an insert, the bonding strength between the first molded part and the second molded part and the sealing performance therebetween become issues.

[0033] Therefore, according to the resin molded product disclosed herein, the first concave interface and the second concave interface are recessed in different directions. The first concave interface is located at the edge area of ​​the first interface, and the second concave interface is located within the range overlapping with the edge area, so the first concave interface is close to the second concave interface. The resin of the second resin part enters and contacts such first concave interface and second concave interface. Therefore, the strength of the joint between the first resin part and the second resin part and the airtightness between the two can be improved by shrinking the second resin part during molding.

[0034] (2B) Preferably, the first interface has a planar first surface, the second interface has a planar second surface orthogonal to the first surface, the first concave interface has a third surface located on the side opposite to the second surface and orthogonal to the first surface, and the second concave interface has a fourth surface located on the side opposite to the first surface and orthogonal to the second surface.

[0035] According to the structure, the first surface is orthogonal to the second surface. The third surface is a surface orthogonal to the first surface, and the fourth surface is a surface orthogonal to the second surface. When the first molded part is manufactured by injection molding, it is not easy to be forcibly pulled out of the mold, and the mold has high pulling performance.

[0036] (3B) Preferably, when the distance between the second surface and the third surface along the first surface is set as a first distance, the distance between the first surface and the fourth surface along the second surface is set as a second distance, the distance between the first surface and a position of the third surface farthest from the first surface along the third surface is set as a third distance, and the distance between the second surface and a position of the fourth surface farthest from the second surface along the fourth surface is set as a fourth distance, 1 / 3×the first distance≤the fourth distance≤9 / 10×the first distance 1 / 3×the second distance ≤ the third distance ≤ 9 / 10×the second distance 0.4≤the first distance / the second distance≤2.5 The relationship formula.

[0037] According to the above structure, the strength of the joint between the first molded part and the second molded part can be further improved. In the first molded part, the strength reduction of the resin part of the edge region including the first interface can be suppressed. The strength of the joint brought about by the shrinkage of the second resin part during molding can be more reliably ensured.

[0038] (4B) From another viewpoint, a method for producing a resin molded article of the present disclosure is the method for producing a resin molded article according to any one of (1B) to (3B) above, comprising: A preparation step of placing the first forming part in a mold; a molding step of supplying molten resin to the mold to mold the second molded portion; and The demolding step is to remove the resin molded product in which the first molded part and the second molded part are integrated from the mold when the molten resin is solidified.

[0039] According to the manufacturing method of the resin molded product disclosed in the present invention, when the shapes of the components of the first molded part or the part of the first resin part surrounding the components are various, it is sufficient to change the mold used for molding the first molded part. The mold used for molding the second molded part can be universal. Therefore, the mold cost can be reduced. The strength of the joint between the first resin part and the second resin part and the airtightness between the two can be improved.

[0040] <Details of Embodiments of the Invention Disclosed>

[0041] Hereinafter, embodiments of the presently disclosed invention will be described.

[0042] [Regarding resin molded products and methods of manufacturing the same]

[0043] Figure 1 This is a perspective view showing an example of a product. Figure 1 The product 1 shown includes a resin molded product 10, a substrate 14, and a cover 15. The resin molded product 10 includes a connector terminal 11 as a first component, a sensor 12 as a second component, and a housing 13. The connector terminal 11, the sensor 12, and the housing 13 are not separated. The substrate 14 is mounted on the housing 13. The cover 15 is fixed to the housing 13. Figure 1 The product 1 is shown in which the substrate 14, the cover 15, and the resin molded product 10 are separated. The product 1 is a sensor device.

[0044] The housing 13 is made of resin. The resin molded product 10 is a composite component formed by integrally molding the housing 13, the connector terminal 11, and the sensor 12 by injection molding. The resin molded product 10 can be divided into a first molded portion 16 and a second molded portion 18.

[0045] Injection molding includes primary injection molding and secondary injection molding.

[0046] Figure 2This is an explanatory diagram of a method for manufacturing a resin molded product 10. One-shot injection molding is injection molding in which the connector terminal 11 is used as an insert and the first resin portion 17 is integrally molded. The first molded portion 16 is a portion having the connector terminal 11 (component) and the first resin portion 17. The connector terminal 11 (component) and the first resin portion 17 are integral.

[0047] The secondary injection molding is an injection molding in which the second resin portion 19 is molded using the first molded portion 16 and the sensor 12 as inserts. The second molded portion 18 is a portion including the sensor 12 and the second resin portion 19 .

[0048] The resin molded product 10 is manufactured by secondary injection molding. The resin molded product 10 is a composite component in which the first molded portion 16 and the second molded portion 18 are integrated.

[0049] The housing 13 includes a first resin portion 17 and a second resin portion 19. The housing has a fitting portion 55 in the first resin portion 17. The connector terminal 11 is fixed to the fitting portion 55 of the housing 13.

[0050] A mating connector (not shown) is fitted into the fitting portion 55. The mating connector is an object different from the resin molded product 10. When the fitting portion 55 is connected to the mating connector, the connector terminal 11 is connected to a mating connector terminal of the mating connector.

[0051] Figure 3 and Figure 4 This is an illustration of secondary injection molding.

[0052] Figure 3 The first molding part 16 is arranged in the mold 7a, 7b. Figure 3 The sensor 12 (not shown) is arranged at a predetermined position of the molds 7a and 7b.

[0053] Figure 4 The figure shows a molding process in which, after arranging the first molded part 16 and the sensor 12 as inserts in the cavity 8 of the molds 7a and 7b, molten resin 19a is supplied to integrally mold the second resin part 19. The secondary injection molding is an injection molding in which the molten resin 19a supplied to the cavity 8 is solidified. The first molded part 16 and the second molded part 18 are integrated by solidification of the molten resin 19a.

[0054] Figure 5 It is a cross-sectional view of a part of the resin molded product 10 removed from the molds 7a and 7b. Figure 5 yes Figure 1 The cross-sectional view taken along the arrow V in FIG. 1 is a cross-sectional view of a surface including the center reference line C of the first molded portion 16 .

[0055] The resin molded product 10 in which the first molded part 16 and the second molded part 18 are integrated is taken out from the molds 7a and 7b. The process of taking out the resin molded product 10 in which the first molded part 16 and the second molded part 18 are integrated from the molds 7a and 7b is a taking out process. The solidified part of the molten resin 19a is the second resin part 19. The second resin part 19 covers a part of the first resin part 17.

[0056] like Figure 1 As shown, the resin molded product 10 manufactured by secondary injection molding has a storage space 20. The substrate 14 is mounted in the storage space 20. The substrate 14 is electrically connected to the connector terminal 11. The substrate 14 is electrically connected to the sensor 12. The cover 15 closes the storage space 20. The resin cover 15 is fixed to the resin molded product 10 by, for example, laser welding. The storage space 20 becomes a closed space. The process of mounting the substrate 14 on the resin molded product 10 and fixing the cover 15 to the resin molded product 10 is an assembly process.

[0057] As described above, the preparation steps are carried out in sequence (refer to Figure 3 )、Molding process (refer to Figure 4 )、Taking out process (refer to Figure 5 )、Assembly process (refer to Figure 1 ). Preparation process (refer to Figure 3 ) is a process of placing the first molded part 16 manufactured by one-shot injection molding in the molds 7a and 7b. The molding process is a process of supplying molten resin 19a to the molds 7a and 7b, solidifying the molten resin 19a, and molding the second molded part 18. The removal process is a process of removing the resin molded product 10 in which the first molded part 16 and the second molded part 18 are integrated from the molds 7a and 7b. The assembly process is a process of assembling the substrate 14 and the cover 15 on the resin molded product 10. The product 1 is completed after four steps.

[0058] like Figure 1 As shown, a portion of the connector terminal 11 is exposed from the housing 13 in a rectangular range in the accommodation space 20. The X direction is a direction perpendicular to the plane containing the rectangle. The Y direction is a direction perpendicular to the X direction and along the long side of the rectangle. The Z direction is a direction perpendicular to the X direction and the Y direction and along the short side of the rectangle. Each figure shows the X direction, the Y direction and the Z direction respectively.

[0059] The arrow head side of the arrow in the X direction of each figure is the first side in the X direction, and the side opposite to the arrow head is the second side in the X direction. The arrow head side of the arrow in the Y direction of each figure is the first side in the Y direction, and the side opposite to the arrow head is the second side in the Y direction. The arrow head side of the arrow in the Z direction of each figure is the first side in the Z direction, and the side opposite to the arrow head is the second side in the Z direction.

[0060] exist Figure 1 and Figure 2 In the embodiment shown, the first molded portion 16 of the resin molded product 10 includes the connector terminal 11 as the first component, and the second molded portion 18 includes the sensor 12 as the second component, but the second component may be omitted. The first component may also be a component other than the connector terminal 11. When the second component is included in the resin molded product 10, the second component may also be a component other than the sensor 12.

[0061] [Regarding the first molded portion 16 and the second molded portion 18]

[0062] If through Figure 2 As described above, the first molded portion 16 is manufactured by one-shot injection molding. The first molded portion 16 has the connector terminal 11 as an insert and the first resin portion 17 integral with the connector terminal 11. The second molded portion 18 is manufactured by two-shot injection molding. The second molded portion 18 has the second resin portion 19 integral with the first molded portion 16 as an insert. Figure 6 It is an explanatory diagram of the resin molded product 10 after the secondary injection molding is completed. Figure 6 This is a schematic diagram in which the first molded portion 16 is separated from the second molded portion 18 in order to distinguish and explain the first molded portion 16 .

[0063] As mentioned above (ref. Figure 4 ), the molten resin 19a formed by secondary injection molding becomes the second resin portion 19 of the second molded portion 18 by solidification. The second resin portion 19 covers a portion of the first resin portion 17. Figure 6 As shown in FIG. 1 , the second resin portion 19 has a ring-shaped portion. The ring-shaped portion covers the first resin portion 17 in a ring shape. The second resin portion 19 covers at least a portion of the first resin portion 17 in a ring shape.

[0064] like Figure 7 As shown, the first resin portion 17 includes a first groove 26 and a second groove 27. The first groove 26 is an annular groove that is recessed from a plane whose vertical direction is the X direction toward the X direction. The second groove 27 is an annular groove that has groove portions that are recessed from two planes whose vertical direction is the Y direction and groove portions that are recessed from two planes whose vertical direction is the Z direction. Figure 8 As shown, the second resin portion 19 fills the first groove 26 and the second groove 27. The second resin portion 19 is in contact with each surface constituting the first groove 26 and each surface constituting the second groove 27.

[0065] The first resin portion 17 includes a first surface 31, a second surface 32, a third surface 33, and a fourth surface 34. The third surface 33 is a surface adjacent to the first surface 31 of the first groove 26. The fourth surface 34 is a surface adjacent to the second surface 32 of the second groove 27. The first resin portion 17 further includes a fifth surface 35, a sixth surface 36, a seventh surface 37, an eighth surface 38, a ninth surface 39, and a tenth surface 40.

[0066] The fifth surface 35 is a surface on the side opposite to the first surface 31 of the first groove 26. The fifth surface 35 and the first surface 31 are located on the same plane. Each surface of the sixth surface 36 is a surface on the side opposite to each surface of the second surface 32 of the second groove 27. Each surface of the sixth surface 36 and each surface of the second surface 32 are respectively located on the same plane. The seventh surface 37 is a surface adjacent to the fifth surface 35 of the first groove 26. The eighth surface 38 is a surface between the third surface 33 and the fifth surface 35. Each surface of the ninth surface 39 is a surface adjacent to each surface of the sixth surface 36 of the second groove 27. Each surface of the tenth surface 40 is a surface between each surface of the fourth surface 34 and each surface of the ninth surface 39.

[0067] The first surface 31 is a first plane perpendicular to the X-axis and in an annular shape. The first surface 31 is parallel to the Y-axis and parallel to the Z-axis. The first surface 31 is an annular surface between the first periphery 61 and the second periphery 62. The first periphery 61 has a rectangular first long side 61a, a second long side 61b, a first short side 61c and a second short side 61d. The second periphery 62 has a rectangular third long side 62a, a fourth long side 62b, a third short side 62c and a fourth short side 62d. The third long side 62a and the fourth long side 62b are located between the first long side 61a and the second long side 61b. The first long side 61a, the second long side 61b, the third long side 62a and the fourth long side 62b are located on the same plane and are parallel. The third short side 62c and the fourth short side 62d are located between the first short side 61c and the second short side 61d. The first short side 61c, the second short side 61d, the third short side 62c, and the fourth short side 62d are located on the same plane and are parallel.

[0068] The second surface 32 is a surface having a perpendicular line to the direction perpendicular to the X-axis. The second surface 32 is a surface including a normal line to the first surface 31. The second surface 32 is an annular surface along the first surface 31.

[0069] The second surface 32 is an annular surface between the first periphery 61 and the third periphery 63. The third periphery 63 is consistent with the periphery that moves the first periphery 61 to the second side in the X direction. The third periphery 63 includes a rectangular fifth long side 63a, a sixth long side 63b, a fifth short side 63c and a sixth short side 63d. The fifth long side 63a is located on the second side in the X direction of the first long side 61a. The sixth long side 63b is located on the second side in the X direction of the second long side 61b. The fifth short side 63c is located on the second side in the X direction of the first short side 61c. The sixth short side 63d is located on the second side in the X direction of the second short side 61d. The second plane 72 is between the first long side 61a and the fifth long side 63a. The third plane 73 is between the second long side 61b and the sixth long side 63b. The fourth plane 74 is between the first short side 61c and the fifth short side 63c. The fifth plane 75 is between the second short side 61d and the sixth short side 63d. The second surface 32 has a second plane 72 , a third plane 73 , a fourth plane 74 , and a fifth plane 75 .

[0070] The third surface 33 is a surface on the side opposite to the second surface 32 with respect to the first surface 31. The third surface 33 is recessed in the normal direction of the first surface 31. The third surface 33 is a side surface of the first groove 26. The third surface 33 is an annular surface along the first surface 31. The third surface 33 is an annular surface between the second peripheral edge 62 and the fourth peripheral edge 64. The fourth peripheral edge 64 is consistent with the peripheral edge that moves the second peripheral edge 62 to the second side in the X direction. The fourth peripheral edge 64 includes a seventh long side 64a, an eighth long side 64b, a seventh short side 64c and an eighth short side 64d of a rectangle. The seventh long side 64a is located on the second side of the third long side 62a in the X direction. The eighth long side 64b is located on the second side of the fourth long side 62b in the X direction. The seventh short side 64c is located on the second side of the third short side 62c in the X direction. The eighth short side 64d is located on the second side of the fourth short side 62d in the X direction. The third long side 62a and the seventh long side 64a form a sixth plane 76. The fourth long side 62b and the eighth long side 64b form a seventh plane 77. The third short side 62c and the seventh short side 64c form an eighth plane 78. The fourth short side 62d and the eighth short side 64d form a ninth plane 79. The third surface 33 has the sixth plane 76, the seventh plane 77, the eighth plane 78 and the ninth plane 79.

[0071] The fourth surface 34 is located on the side opposite to the first surface 31 relative to the second surface 32. The fourth surface 34 is recessed in the normal direction of the second surface. The fourth surface 34 is a side surface of the second groove 27. The fourth surface 34 is an annular tenth plane 80 along the second surface 32. The fourth surface 34 is an annular surface between the third periphery 63 and the fifth periphery 65. The fifth periphery 65 includes a ninth long side 65a, a tenth long side 65b, a ninth short side 65c and a tenth short side 65d of a rectangle. The ninth long side 65a is located on the first side of the fifth long side 63a in the Z direction. The tenth long side 65b is located on the second side of the sixth long side 63b in the Z direction. The ninth short side 65c is located on the first side of the fifth short side 63c in the Y direction. The tenth short side 65d is located on the second side of the sixth short side 63d in the Y direction. The ninth long side 65a and the tenth long side 65b are located between the fifth long side 63a and the sixth long side 63b. The fifth long side 63a, the sixth long side 63b, the ninth long side 65a and the tenth long side 65b are located on the same plane and are parallel. The ninth short side 65c and the tenth short side 65d are located between the fifth short side 63c and the sixth short side 63d. The fifth short side 63c, the sixth short side 63d, the third short side 65c and the fourth short side 65d are located on the same plane and are parallel.

[0072] The first distance L1 is the distance on the first plane 31 in the normal direction of the second surface 32 at any point of the first periphery 61, and is the distance between the second surface 32 and the third surface 33. The first distance L1 is the distance on the first plane 31 in the normal direction of the second plane 72 at any point of the first long side 61a, including the distance between the first long side 61a and the third long side 62a. The first distance L1 is the distance on the first plane 31 in the normal direction of the third plane 73 at any point of the second long side 61b, including the distance between the second long side 61b and the fourth long side 62b. The first distance L1 is the distance on the first plane 31 in the normal direction of the fourth plane 74 at any point of the first short side 61c, including the distance between the first short side 61c and the third short side 62c. The first distance L1 is the distance on the first plane 31 in the normal direction of the fifth plane 75 at any point of the second short side 61d, including the distance between the second short side 61d and the fourth short side 62d.

[0073] The second distance L2 is the distance on the second surface 32 in the normal direction of the first surface 31 at any point of the first periphery 61, and is the distance between the first surface 31 and the fourth surface 34. The second distance L2 is the distance on the second plane 72 in the normal direction of the first plane 31 at any point of the first long side 61a, including the distance between the first long side 61a and the fifth long side 63a. The second distance L2 is the distance on the third plane 73 in the normal direction of the first plane 31 at any point of the second long side 61b, including the distance between the second long side 61b and the sixth long side 63b. The second distance L2 is the distance on the fourth plane 74 in the normal direction of the first plane 31 at any point of the first short side 61c, including the distance between the first short side 61c and the fifth short side 63c. The second distance L2 is the distance on the fifth plane 75 in the normal direction of the first plane 31 at any point of the second short side 61d, including the distance between the second short side 61d and the sixth short side 63d.

[0074] The third distance L3 is the distance on the third surface 33 in the normal direction of the first surface 31 of any point of the second periphery 62, and is the distance between the first surface 31 and the position farthest from the first surface 31. The third distance L3 is the distance on the sixth plane 76 in the normal direction of the first plane 31 of any point of the third long side 62a, including the distance between the third long side 62a and the seventh long side 64a. The third distance L3 is the distance on the seventh plane 77 in the normal direction of the first plane 31 of any point of the fourth long side 62b, including the distance between the fourth long side 62b and the eighth long side 64b. The third distance L3 is the distance on the eighth plane 78 in the normal direction of the first plane 31 of any point of the third short side 62c, including the distance between the third short side 62c and the seventh short side 64c. The third distance L3 is the distance on the ninth plane 79 in the normal direction of the first plane 31 of any point of the fourth short side 62d, including the distance between the fourth short side 62d and the eighth short side 64d.

[0075] The fourth distance L4 is the distance on the fourth surface 34 in the normal direction of the second surface 32 at any point of the third periphery 63, and is the distance between the second surface 32 and the position farthest from the second surface 32. The fourth distance L4 is the distance on the tenth plane 80 in the normal direction of the second plane 72 at any point of the fifth long side 63a, including the distance between the fifth long side 63a and the ninth long side 65a. The fourth distance L4 is the distance on the tenth plane 80 in the normal direction of the third plane 73 at any point of the sixth long side 63b, including the distance between the sixth long side 63b and the tenth long side 65b. The fourth distance L4 is the distance on the tenth plane 80 in the normal direction of the fourth plane 74 at any point of the fifth short side 63c, including the distance between the fifth short side 63c and the ninth short side 65c. The fourth distance L4 is the distance on the tenth plane 80 in the normal direction of the fifth plane 75 at any point of the fifth short side 63d, including the distance between the sixth short side 63d and the tenth short side 65d.

[0076] After the secondary injection molding, the second resin portion 19 contacts all of the first surface 31, the second surface 32, the third surface 33, and the fourth surface 34 of the first resin portion 17. After the secondary injection molding, each of the first surface 31, the second surface 32, the third surface 33, and the fourth surface 34 of the first resin portion 17 becomes an interface with the second resin portion 19. After the secondary injection molding, the second resin portion 19 contacts all of the first groove 26 and the second groove 27 of the first resin portion 17. The first surface 31 and the second surface 32 are connected at a corner. The trajectory of the corner is the first peripheral edge 61. The first surface 31 and the third surface 33 are connected at a corner. The trajectory of the corner is the second peripheral edge 62. The second surface 32 and the fourth surface 34 are connected at a corner. The trajectory of the corner is the third peripheral edge 63.

[0077] [Regarding resin molded products 10]

[0078] Since the second molded portion 18 is injection molded with the first molded portion 16 as an insert (embedded product), a bonding interface 25 (see Figure 5 ). The first resin portion 17 has a first interface 21, a second interface 22, a first concave interface 23, and a second concave interface 24 as a bonding interface 25 with the second resin portion 19. The second resin portion 19 covers the entire surface of the first interface 21 and the entire surface of the second interface 22. The second resin portion 19 covers the entire surface of the first concave interface 23 and the entire surface of the second concave interface 24.

[0079] exist Figure 5 In the embodiment shown in the figure, the first interface 21 is a portion of the surface 29 of the first molded portion 16 that faces the upper side in the X direction. The second resin portion 19 has an annular portion that covers the peripheral edge portion 17a of the first resin portion 17 (see Figure 5 and Figure 6 ). The first interface 21 is an annular surface centered on the central reference line C in the X direction. The first interface 21 has a planar first surface 31. Furthermore, the first interface 21 has a fifth surface 35 on the opposite side of the first surface 31 across the first concave interface 23.

[0080] The second interface 22 is a side surface facing the Y direction, the opposite direction of the Y direction, the Z direction, and the opposite direction of the Z direction. That is, the second interface 22 is an annular (cylindrical) surface. The second interface 22 has a second surface 32. The second surface 32 is continuous from the edge 21a of the entire circumference of the first interface 21 and intersects with the first interface 21. In the present embodiment, the second surface 32 is a plane orthogonal to the first surface 31. In addition, the second interface 22 has a sixth surface 36 on the side opposite to the second surface 32 across the second concave interface 24.

[0081] The second interface 22 has four planar second surfaces 32 as surfaces facing the Y direction, the direction opposite to the Y direction, the Z direction, and the direction opposite to the Z direction. The second surface 32 is a surface extending in a direction orthogonal to the first surface 31 (first interface 21). The second interface 22 has four planar sixth surfaces 36 as surfaces facing the same direction as the second surface 32.

[0082] Figure 7 2 is a perspective view of the first molded portion 16. The first concave surface 23 is a surface that is concave from the first interface 21. The first concave surface 23 is continuous along the annular first interface 21. When the first molded portion 16 is viewed as a single body, the first concave surface 23 is an annular first groove 26. Figure 8 It is a magnified representation Figure 5 The first concave interface 23 has a third surface 33, a first opposite surface (seventh surface 37) and a first bottom surface (eighth surface 38). The third surface 33 is located on the side opposite to the second surface 32 and is orthogonal to the first surface 31. The first opposite surface (seventh surface 37) is a surface opposite to the third surface 33. The first bottom surface (eighth surface 38) is the bottom surface of the first groove 26, connecting the third surface 33 and the first opposite surface (seventh surface 37).

[0083] like Figure 7 As shown, the second concave interface 24 is a surface that is concave from the second interface 22. The second concave interface 24 is continuous along the annular second interface 22. When the first molded portion 16 is viewed as a single body, the second concave interface 24 is an annular second groove 27. Figure 8As shown, the second concave interface 24 has a fourth surface 34, a second opposite surface (ninth surface 39) and a second bottom surface (tenth surface 40). The fourth surface 34 is located on the side opposite to the first surface 31 and is orthogonal to the second surface 32. The second opposite surface (ninth surface 39) is a surface opposite to the fourth surface 34. The second bottom surface (tenth surface 40) is the bottom surface of the second groove 27, connecting the fourth surface 34 and the second opposite surface (ninth surface 39).

[0084] like Figure 7 and Figure 8 As shown, in the first resin portion 17, the first concave interface 23 and the second concave interface 24 are arranged close to each other. The first concave interface 23 is formed in an annular shape along the edge region K1 of the first interface 21. The second concave interface 24 is formed in an annular shape along the second interface 22 in a range overlapping with the edge region K1. The second concave interface 24 is formed in a range overlapping with the edge region K1 of the first interface 21 in the Z direction, the opposite direction of the Z direction, the Y direction, and the opposite direction of the Y direction.

[0085] [Regarding the resin molded article 10 having the above structure]

[0086] As described above, the resin molded article 10 (see Figure 5 ) includes a first molded portion 16 and a second molded portion 18. The first molded portion 16 includes a connector terminal 11 as an insert and a first resin portion 17 integral with the connector terminal 11. The second molded portion 18 includes a second resin portion 19. The first resin portion 17 includes a first surface 31, a second surface 32, a third surface 33 and a fourth surface 34. The second resin portion 19 is in contact with all of the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34 of the first resin portion 17.

[0087] According to the resin molded product 10 of the present embodiment, even when the shapes of the connector terminal 11 of the first molded portion 16 or the fitting portion 55 of the first resin portion 17 vary, it is sufficient to change the mold used for molding the first molded portion 16. In contrast, the molds 7a and 7b (see Figure 3 and Figure 4 Therefore, compared with the prior art that requires a plurality of molds having only a part of slightly different shapes but mostly the same shape, the mold cost can be reduced.

[0088] If the second molded part 18 is molded by injection molding using the first molded part 16 as an insert, the bonding strength between the first molded part 16 and the second molded part 18 and the sealing performance therebetween become issues. Figure 5), the first surface 31 is annular, the second surface 32 is a surface including the normal of the first surface 31, the second surface 32 is annular along the first surface 31, and the second surface 32 is arranged adjacent to the first surface 31, the third surface 33 is recessed in the normal direction of the first surface 31, the third surface 33 is annular along the first surface 31, and the third surface 33 is arranged adjacent to the first surface 31 on the side opposite to the second surface 32, the fourth surface 34 is recessed in the normal direction of the second surface 32, the fourth surface 34 is annular along the second surface 32, and the fourth surface 34 is arranged adjacent to the second surface 32 on the side opposite to the first surface 31, and the second surface 32 along the first surface 31 in the normal direction of the second surface 32 is The distance between the first surface 31 and the third surface 33 is set as the first distance L1, the distance between the first surface 31 and the fourth surface 34 along the second surface 32 in the normal direction of the first surface 31 is set as the second distance L2, the distance between the first surface 31 and the position of the third surface 33 farthest from the first surface 31 along the third surface 33 in the normal direction of the first surface 31 is set as the third distance L3, and the distance between the second surface 32 and the position of the fourth surface 34 farthest from the second surface 32 along the fourth surface 34 in the normal direction of the second surface 32 is set as the fourth distance L4, and the fourth distance L4 has a relationship of 1 / 3≤fourth distance L4 / first distance L1≤9 / 10 with respect to the first distance L1. The third distance L3 has a relationship of 1 / 3≤third distance L3 / second distance L2≤9 / 10 with respect to the second distance L2, and the first distance L1 has a relationship of 2 / 5≤first distance L1 / second distance L2≤5 / 2 with respect to the second distance L2.

[0089] like Figure 7 and Figure 8 As shown, the first surface 31 is connected to the second surface 32 at a corner, the first surface 31 is connected to the third surface 33 at a corner, and the second surface 32 is connected to the fourth surface 34 at a corner. The second resin part 19 covers all of the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34.

[0090] The second resin portion 19 shrinks during molding. Since the first resin portion 17 does not shrink, the second resin portion 19 presses the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34 of the first resin portion 17. Figure 8 Arrows F1 and F2 represent the compressive force of the second resin portion 19 to tighten the first resin portion 17 due to the contraction of the second resin portion 19 during molding. The resin molded product 10 of this embodiment can improve the strength of the joint between the first resin portion 17 and the second resin portion 19 and the sealing performance therebetween due to the contraction of the second resin portion 19.

[0091] In the present embodiment, the first surface 31, the second surface 32, the third surface 33, and the fourth surface 34 are composed of the first plane 31, the second plane 72, the third plane 73, the fourth plane 74, the fifth plane 75, the sixth plane 76, the seventh plane 77, the eighth plane 78, the ninth plane 79, and the tenth plane 80. Among these planes, any plane is orthogonal to other adjacent planes.

[0092] Therefore, when the first molded portion 16 is manufactured by injection molding, the combination of molds does not need to be complicated, and the first molded portion 16 is not easily pulled out of the mold by force, and can be easily pulled out of the mold.

[0093] [About the specific structure of the joint]

[0094] Figure 8 The cross section shown shows the first distance L1, the second distance L2, the third distance L3, and the fourth distance L4 of this embodiment. As described above, the mutual relationships among the first distance L1, the second distance L2, the third distance L3, and the fourth distance L4 all satisfy the following equations (1), (2), and (3).

[0095] Formula (1): 1 / 3≤4th distance L4 / first distance L1≤9 / 10

[0096] Formula (2): 1 / 3≤third distance L3 / second distance L2≤9 / 10

[0097] Formula (3): 2 / 5≤first distance L1 / second distance L2≤5 / 2

[0098] According to the above formula (1), “1 / 3 ≤ fourth distance L4 / first distance L1”, the depth of the fourth surface 34 in the Z direction is equal to or greater than 1 / 3 of the first distance L1. The depth of the second resin portion 19 in the Z direction in contact with the fourth surface 34 becomes sufficient, and the compressive force ( Figure 8 The air is effectively transferred to the fourth surface 34 as indicated by the arrow F1. The seal formed by the first resin portion 17 and the second resin portion 19 has good airtightness, and moisture is not easily infiltrated into the gap between the first resin portion 17 and the second resin portion 19 from the external space.

[0099] According to the above formula (2), “1 / 3 ≤ third distance L3 / second distance L2”, the depth of the third surface 33 in the X direction is equal to or greater than 1 / 3 of the second distance L2. The depth of the second resin portion 19 in the X direction in contact with the third surface 33 becomes sufficient, and the compressive force ( Figure 8 The air is effectively transferred to the third surface 33 as indicated by the arrow F2. The seal formed by the first resin portion 17 and the second resin portion 19 has good airtightness, and moisture is not easy to penetrate into the gap between the first resin portion 17 and the second resin portion 19 from the external space.

[0100] According to the "fourth distance L4 / first distance L1≤9 / 10" of the above formula (1) and the "third distance L3 / second distance L2≤9 / 10" of the above formula (2), the above position P1 and the above position P2 are not too close. That is, when the first molded part 16 is considered as a single body, the corner block portion 54 of the first resin part 17 having the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34 is prevented from being cut off from the other central block portion 53. The first molded part 16 is difficult to be separated from the second molded part 18.

[0101] According to the above formula (3), one of the first distance L1 and the second distance L2 will not become extremely large compared to the other. With respect to one of the first distance L1 and the second distance L2, when the first distance L1 is extremely small relative to the third distance L3 or the second distance L2 is extremely small relative to the fourth distance L4, the second resin portion 19 does not strongly press the third surface 33 or the fourth surface 34, so it is difficult for the first resin portion 17 and the second resin portion 19 to have good sealing properties.

[0102] 〔About others〕

[0103] In the above-mentioned embodiment, the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34 are each a plane or a combination of planes, and are respectively orthogonal surfaces. On the other hand, as long as the first surface 31, the second surface 32, the third surface 33 and the fourth surface 34 of the present invention are not forcibly pulled out when the mold is removed or the first resin portion 17 is not plastically deformed, the shape of the surface may also be partially convex or concave. In addition, for example, the first surface 31 is orthogonal to the second surface 32, but as long as they are not forcibly pulled out, they may also intersect at other angles. Similarly, with respect to other surfaces, the angle formed by adjacent surfaces may not be a right angle.

[0104] The above-described embodiments are illustrative in all respects and are not restrictive. The scope of rights of the present invention is indicated by the claims rather than the above-described embodiments, and includes all modifications within the scope equivalent to the structures described in the claims.

[0105] Description of Reference Numerals

[0106] 7a, 7b mold

[0107] 10 Resin molded products

[0108] 11 Connector terminal (component)

[0109] 16 First Forming Department

[0110] 17 First Resin Department

[0111] 17a Periphery

[0112] 18 Second Forming Department

[0113] 19a Molten resin

[0114] 19 Second Resin Department

[0115] 31 Page 1

[0116] 32 Side 2

[0117] 33. Side 3

[0118] 34 Page 4

[0119] L1 First distance

[0120] L2 Second distance

[0121] L3 Third distance

[0122] L4 Fourth distance

Claims

1. A resin molded article, wherein The resin molded product has a first molded portion and a second molded portion, The first molded portion includes a component as an insert and a first resin portion integral with the component. The second molded portion has a second resin portion, The first resin portion includes a first surface, a second surface, a third surface, and a fourth surface. The first surface is annular, The second surface is a surface including a normal line of the first surface, The second surface is annular along the first surface, The second surface is arranged adjacent to the first surface, The third surface is concave in the normal direction of the first surface, The third surface is annular along the first surface, The third surface is arranged adjacent to the first surface on a side opposite to the second surface, The fourth surface is concave in the normal direction of the second surface, The fourth surface is annular along the second surface, The fourth surface is arranged adjacent to the second surface on a side opposite to the first surface, setting a distance between the second surface and the third surface along the first surface in a normal direction of the second surface to be a first distance, setting the distance between the first surface and the fourth surface along the second surface in the normal direction of the first surface to be a second distance, a distance between the first surface and a position of the third surface farthest from the first surface along the third surface in the normal direction of the first surface as a third distance, a distance between the second surface and a position of the fourth surface farthest from the second surface along the fourth surface in a normal direction of the second surface as a fourth distance, The fourth distance has a relationship of 1 / 3≤the fourth distance / the first distance≤9 / 10 with respect to the first distance, The third distance has a relationship of 1 / 3≤the third distance / the second distance≤9 / 10 with respect to the second distance, The first distance is related to the second distance by 2 / 5≤the first distance / the second distance≤5 / 2, The second resin portion is in contact with all of the first surface, the second surface, the third surface, and the fourth surface of the first resin portion.

2. A method for producing a resin molded product, which is the method for producing a resin molded product according to claim 1, wherein: The method for producing the resin molded article comprises: A preparation step of placing the first forming part in a mold; a molding step of supplying molten resin to the mold to mold the second molded portion; and The demolding step is to remove the resin molded product in which the first molded part and the second molded part are integrated from the mold when the molten resin is solidified.

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