Injection molding part and injection mold

Abstract

The utility model provides an injection molding part and an injection mold, and relates to the technical field of injection molding. Wherein the injection molding part comprises a main body, a connecting column and a positioning part; the connecting column is provided with a mounting hole and a matching end face, the mounting hole penetrates one end, deviating from the body, of the connecting column in the first direction, and the matching end face is located on the peripheral side of the mounting hole. The positioning part is arranged at one end, deviating from the main body in the first direction, of the connecting column, is positioned on the peripheral side of the mounting hole and protrudes out of the matching end surface in the first direction; the positioning part is provided with a first forming face and a second forming face, the first forming face is located on the side, close to the mounting hole, of the positioning part, the second forming face is located on the side, away from the connecting column in the first direction, of the positioning part, the first forming face is connected with the second forming face, and a ridge is formed at the junction of the first forming face and the second forming face. According to the injection molding component, the insert pin structure can be simplified while the appearance quality and the assembly precision are improved, and the yield of the insert pins is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding, and in particular to an injection molded part and an injection mold. BACKGROUND

[0002] Taking an air conditioner panel as an example, the air conditioner panel is usually an injection molded part, wherein the air conditioner panel comprises a connecting column having a mounting hole and a positioning portion on the connecting column, the positioning portion is used for positioning with a display device, and the connecting column is used for fastening connection with the display device. The air conditioner panel is usually injection molded by cooperating a mold body and a pin.

[0003] However, in the related art, the positioning portion and the connecting column are prone to forming a step on a molding surface due to machining errors and assembly errors of the mold body and the pin during injection molding, which affects the appearance quality and assembly precision of the injection molded part, and the pin structure in the related art is complex, which further increases the machining errors and assembly errors of the pin. SUMMARY

[0004] Therefore, an embodiment of the present application provides an injection molded part and an injection mold, which can improve the appearance quality and assembly precision of the injection molded part, simplify the pin structure, and improve the yield of the pin.

[0005] To achieve the above object, an embodiment of the present application provides an injection molded part, comprising:

[0006] a main body;

[0007] a connecting column protruding from one side of the main body along a first direction; the connecting column has a mounting hole and a matching end face, the mounting hole penetrates through one end of the connecting column away from the main body along the first direction, and the matching end face is located at one end of the connecting column away from the main body along the first direction and at the outer circumferential side of the mounting hole;

[0008] a positioning portion provided at one end of the connecting column away from the main body along the first direction, the positioning portion being located at the outer circumferential side of the mounting hole and protruding from the matching end face in the first direction; the positioning portion has a first molding surface located at one side of the positioning portion close to the mounting hole and a second molding surface located at one side of the positioning portion away from the connecting column along the first direction, the first molding surface and the second molding surface are connected, and an intersection of the first molding surface and the second molding surface forms an edge line.

[0009] In an embodiment, the number of the positioning portions is multiple, the multiple positioning portions are arranged at intervals along the circumference of the mounting hole, and the matching end face is located between two adjacent positioning portions.

[0010] In one embodiment, the first profile surface of each positioning portion is in contact with a side wall surface of a same virtual cylinder.

[0011] In one embodiment, at least one of opposite sides of the positioning portion along the circumferential direction of the mounting hole has a third profile surface, and the third profile surface and the first profile surface are connected by a chamfer surface.

[0012] In one embodiment, the width dimension between the third profile surface and the first profile surface is not less than 0.5mm.

[0013] In one embodiment, the mounting hole comprises a main section and a fitting section, the fitting section is located on a side of the main section close to the positioning portion along the first direction, and penetrates the connecting column along the first direction away from the main section, the inner wall surface of the fitting section is in contact with and smoothly connected to the first profile surface.

[0014] In one embodiment, the cross-sectional area of the fitting section perpendicular to the first direction is larger than the cross-sectional area of the main section perpendicular to the first direction.

[0015] And / or, the main section comprises a first sub-section and a second sub-section located between the first sub-section and the fitting section, the cross-sectional area of the second sub-section perpendicular to the first direction gradually increases away from the first sub-section.

[0016] In one embodiment, the length dimension of the fitting section along the first direction is not less than 0.2mm.

[0017] In one embodiment, the injection molded part is an air conditioner panel.

[0018] Another embodiment of the present application provides an injection mold for manufacturing the injection molded part described above, the injection mold comprises a mold body having a mold cavity and an insert needle at least partially located in the mold cavity, the injection molded part is injection molded in the mold cavity, and the insert needle is used to form the mounting hole and the first profile surface.

[0019] The embodiment of the application provides an injection molded part and an injection mold, the technical scheme of the embodiment of the application cancels the round corner transition between the first forming surface and the second forming surface, the first forming surface and the second forming surface are connected, and a ridge line is formed at the junction of the first forming surface and the second forming surface, a recessed area for forming a round corner does not need to be formed on the insert pin, the problem of thin steel of the insert pin is fundamentally avoided, therefore, the insert pin does not need to be expanded outwardly to occupy the forming area of the second forming surface, that is, the second forming surface is no longer a split surface formed by the insert pin and the mold body, thereby fundamentally eliminating the product step difference, improving the appearance quality and assembly precision. Meanwhile, the cancellation of the round corner transition can also simplify the structure of the insert pin, significantly reduce the machining error and manufacturing difficulty of the insert pin, and improve the manufacturing yield of the insert pin. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic diagram of an injection molded part and an injection mold in the related art;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of an injection molded part according to an embodiment of the application;

[0022] Figure 3 FIG. 3 is a partial enlarged view of A in FIG. 2; Figure 1

[0023] Figure 4 FIG. 4 is a sectional view of an injection molded part and an injection mold according to an embodiment of the application;

[0024] Figure 5 FIG. 5 is a partial enlarged view of B in FIG. 4; Figure 4

[0025] Figure 6 FIG. 6 is a sectional view of the injection molded part and the injection mold from another angle in FIG. 4. Figure 4 REFERENCE SIGNS:

[0026] 10, injection molded part; 11, main body; 12, connecting column; 12a, mounting hole; 12a1, main body section; 12a11, first sub-section; 12a12, second sub-section; 12a2, matching section; 12b, matching end face; 13, positioning part; 13a, first forming surface; 13b, second forming surface; 13c, third forming surface; 13d, chamfer surface; 20, injection mold; 21, mold body; 21a, first cavity wall; 21b, second cavity wall; 21c, third cavity wall; 22, insert pin; 221, first section; 222, second section.

[0027] DETAILED DESCRIPTION In the description of the embodiment of the application, it should be noted that the term “first direction” is based on the direction of the arrow in the drawings, and the term “second direction” is based on the direction of the arrow in the drawings.

[0028] Figure 6 ​​​The positional terms are used only to facilitate the description of the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0029] The embodiments of the present application provide an injection molded part 10, please refer to Figures 2 to 6 , the injection molded part 10 includes a main body 11, a connecting column 12 and a positioning portion 13.

[0030] The injection molded part 10 includes but is not limited to a structure such as an air conditioner panel. Exemplarily, Figure 2 The injection molded part 10 shown is an air conditioner panel, and the connecting column 12 and the positioning portion 13 of the air conditioner panel are used to connect with a display device, that is, the display device is installed on the air conditioner panel through the connecting column 12 and the positioning portion 13.

[0031] Please continue to refer to Figures 2 to 6 , the connecting column 12 protrudes from one side of the main body 11 along the first direction. The connecting column 12 has a mounting hole 12a and a matching end face 12b, the mounting hole 12a penetrates through one end of the connecting column 12 away from the main body 11 along the first direction, and the matching end face 12b is located at one end of the connecting column 12 away from the main body 11 along the first direction and on the outer peripheral side of the mounting hole 12a.

[0032] The connecting column 12 is a part of the injection molded part 10 that connects with another component such as a display device, and specifically, the other component has a fastening hole that communicates with the mounting hole 12a of the connecting column 12, and a fastener such as a screw or a stud is arranged in the fastening hole and the mounting hole 12a along the first direction to fix the other component on the injection molded part 10.

[0033] The positioning portion 13 is provided at one end of the connecting column 12 away from the main body 11 along the first direction, and the positioning portion 13 is located on the outer peripheral side of the mounting hole 12a and protrudes from the matching end face 12b in the first direction. The positioning portion 13 has a first shaped surface 13a and a second shaped surface 13b, the first shaped surface 13a is located on the side of the positioning portion 13 close to the mounting hole 12a, and the second shaped surface 13b is located on the side of the positioning portion 13 away from the connecting column 12 along the first direction, the first shaped surface 13a and the second shaped surface 13b are connected, and the intersection of the first shaped surface 13a and the second shaped surface 13b forms an edge line.

[0034] The positioning portion 13 is used for positioning the injection molded part 10 and another part. Exemplarily, the other part has a positioning opening corresponding to the positioning portion 13, and the positioning portion 13 extends into the positioning opening so that the fastening hole of the other part is aligned with the mounting hole 12a of the connecting column 12, avoiding misalignment of the fastener and the connecting column 12, and facilitating assembly efficiency. Since the positioning portion 13 protrudes from the mating end face 12b in the first direction, when the positioning portion 13 is matched with the positioning opening, the mating end face 12b can abut against the other part to limit the other part in the radial direction.

[0035] It should be emphasized that the ridge line refers to a linear structure formed by the direct intersection of the first forming surface 13a and the second forming surface 13b, that is, there is no round or chamfer transition structure between the first forming surface 13a and the second forming surface 13b. From the micro scale, due to the characteristics of the injection molding process itself, it is difficult to achieve an absolute geometric sharp corner, and the ridge line may be accompanied by a very small, process overflow arc. However, the "ridge line" in the present application specifically refers to the case where the radius of the arc is significantly smaller than the traditional design round or chamfer.

[0036] Another embodiment of the present application provides an injection mold 20 for manufacturing the injection molded part 10 provided by any embodiment of the present application, please refer to Figures 4 to 6 The injection mold 20 includes a mold body 21 having a cavity (not shown in the figure) and a pin 22 at least partially located in the cavity, and the injection molded part 10 is injection molded in the cavity, and the pin 22 is used to form the mounting hole 12a and the first forming surface 13a, that is, the pin 22 is not used to form the second forming surface 13b.

[0037] Please continue to refer to Figures 4 to 6 The cavity of the mold body 21 has a first cavity wall 21a and a second cavity wall 21b located on the outer circumferential side of the first cavity wall 21a, and the second cavity wall 21b is used to form the outer contour of the injection molded part 10. The pin 22 extends into the cavity from the side where the first cavity wall 21a is located, that is, the outer circumferential side of the at least partially structured pin 22 directly abuts against the first cavity wall 21a, and there is no recessed cavity for forming a round corner between the outer circumferential side of the at least partially structured pin 22 and the first cavity wall 21a. While the pin 22 forms the mounting hole 12a and the first forming surface 13a, the first cavity wall 21a forms the second forming surface 13b, that is, the second forming surface 13b is formed only by the first cavity wall 21a, rather than being formed by the pin 22 and the first cavity wall 21a together.

[0038] More preferably, please refer to Figures 4 to 6 The mating end face 12b is formed by the mold body 21, that is, the cavity wall of the cavity can also be used to form the mating end face 12b. Please refer to Figure 4 and Figure 5The third cavity wall 21c is located outside the periphery of the insert pin 22, and the cooperation end face 12b is formed by the third cavity wall 21c instead of being formed by the insert pin 22 and the third cavity wall 21c together, so that the structure of the insert pin 22 can be further simplified.

[0039] In the related art, please refer to Figure 1 The first forming surface 13a and the second forming surface 13b of the positioning part 13 are connected through a fillet, and correspondingly, a recessed area for forming the fillet needs to be formed on the insert pin 22 of the injection mold 20. In order to avoid the thin steel problem of the recessed area and ensure the strength of the mold, the insert pin 22 needs to be expanded outwardly, so that the forming range of the insert pin 22 extends to a part of the second forming surface 13b. Therefore, a part of the second forming surface 13b is formed by the mold body 21, and another part is formed by the insert pin 22. However, due to the inevitable errors in machining and assembly of the mold body 21 and the insert pin 22, the combination of the mold body 21 and the insert pin 22 at the second forming surface 13b area is difficult to completely align, and a step difference is easily generated on the second forming surface 13b. This not only affects the appearance quality of the injection molded part 10, but also causes uneven gaps, misalignment or interference when the second forming surface 13b is assembled with other parts, which affects the assembly precision and connection stability. In addition, this design also causes the structure of the insert pin 22 to be complex (such as needing to form multiple stepped surfaces on the insert pin 22), the machining process to be complicated, and the cumulative error to be large, so that the manufacturing yield of the mold itself is difficult to guarantee.

[0040] The technical scheme of the embodiment of the present application cancels the fillet transition between the first forming surface 13a and the second forming surface 13b, so that the first forming surface 13a and the second forming surface 13b are connected, and a ridge line is formed at the junction of the first forming surface 13a and the second forming surface 13b. Therefore, there is no need to form a recessed area for forming a fillet on the insert pin 22, which avoids the thin steel problem of the insert pin 22 from the root, so that the insert pin 22 does not need to be expanded outwardly to invade the forming area of the second forming surface 13b. That is, the second forming surface 13b is no longer a split surface formed by the insert pin 22 and the mold body 21 together, which fundamentally eliminates the product step difference and improves the appearance quality and assembly precision. At the same time, the cancellation of the fillet transition also simplifies the structure of the insert pin 22, significantly reduces the machining error and manufacturing difficulty of the insert pin 22, and improves the manufacturing yield of the insert pin 22.

[0041] In some embodiments, please refer to Figure 2 and Figure 6 The number of positioning parts 13 can be multiple, and the multiple positioning parts 13 are arranged at intervals along the circumference of the mounting hole 12a, and the cooperation end face 12b is located between two adjacent positioning parts 13.

[0042] By setting multiple positioning portions 13, the positioning effect of the injection molded part 10 and another part can be improved, and meanwhile, the multiple positioning portions 13 are respectively inserted into corresponding positioning holes, which can also prevent the display device from rotating during assembly.

[0043] Figure 2 and Figure 6 The number of the positioning portions 13 is two, and the two positioning portions 13 are respectively arranged on the opposite sides of the mounting hole 12a in the radial direction. In some other embodiments, the number of the positioning portions 13 can also be one, three or more than three.

[0044] Exemplarily, referring to Figure 6 , the first forming surface 13a of each positioning portion 13 can be attached to the side wall surface of the same virtual cylinder.

[0045] That is, the part of the inlay pin 22 for forming the first forming surface 13a is a cylinder, which can not only ensure the stability of the cooperation with the fastener, but also simplify the structure of the inlay pin 22 and facilitate the production and processing of the inlay pin 22.

[0046] Preferably, the diameter of the virtual cylinder can be 4.5 mm, which can not only ensure that the inlay pin 22 has good structural strength, but also enable the first forming surface 13a between the multiple positioning portions 13 to adapt to the size of the inlay pin 22.

[0047] In some embodiments, referring to Figure 2 and Figure 3 , at least one side of the opposite sides of the positioning portion 13 along the circumferential direction of the mounting hole 12a has a third forming surface 13c, and the third forming surface 13c and the first forming surface 13a can be transitioned through a chamfer surface 13d.

[0048] The chamfer surface 13d refers to a transition plane integrally formed between the first forming surface 13a and the third forming surface 13c through the injection mold 20, and the chamfer surface 13d is inclined (generally 45° or 30°) relative to the first forming surface 13a and the third forming surface 13c, that is, the chamfer surface 13d is a planar structure, rather than an arc-shaped structure such as a rounded surface. By setting the chamfer surface 13d, not only can the first forming surface 13a and the third forming surface 13c be smoothly transitioned, but also the appearance can be improved.

[0049] Referring to Figure 1 , in the related art, the first forming surface 13a and the third forming surface (not shown in the figure) are transitioned through a rounded corner, and when the inlay pin 22 is enlarged outward, not only will the forming range thereof be extended to a part of the second forming surface 13b, but also will be extended to a part of the third forming surface, and the present application Figures 4 to 6The middle insert pin 22 only needs to be configured with the first forming surface 13a and the mounting hole 12a, and the third forming surface 13c and the chamfer surface 13d are formed by the cavity wall of the cavity. If the first forming surface 13a and the third forming surface 13c adopt a round corner transition, the corner of the cavity corresponds to a circular arc, which will cause the thickness of the steel material at the edge of the round corner of the mold body 21 to be thin, resulting in a sharp steel problem. However, by using the chamfer surface 13d, the corner of the cavity is an inclined plane, and the thickness of the steel material at the edge is uniform, without a thin edge structure, thereby alleviating the sharp steel problem.

[0050] Exemplarily, the width dimension L between the chamfer surface 13d and the third forming surface 13c and the first forming surface 13a is not less than 0.5 mm, which avoids the sharp steel problem of the injection mold 20 while ensuring the appearance of the injection part 10 to be flat.

[0051] In some embodiments, referring to Figure 2 and Figure 3 , the mounting hole 12a includes a main body segment 12a1 and a matching segment 12a2, the matching segment 12a2 is located on the side of the main body segment 12a1 close to the positioning portion 13 along the first direction, and penetrates through the end of the connecting column 12 away from the main body 11 along the first direction, and the inner wall surface of the matching segment 12a2 can be connected with the first forming surface 13a and smoothly transitioned.

[0052] That is, the inner wall surface of the matching segment 12a2 and the first forming surface 13a are continuous and smooth, and the two surfaces are smoothly transitioned without edges and corners.

[0053] For ease of description, it is defined that the insert pin 22 has a first segment 221 and a second segment 222 along the length direction, the first segment 221 is used for forming the main body segment 12a1 of the mounting hole 12a, and the second segment 222 is used for forming the first forming surface 13a of the positioning portion 13 and the matching segment 12a2 of the mounting hole 12a, referring to Figures 4 to 6 , the first segment 221 is located in the cavity of the mold body 21, part of the structure of the second segment 222 protrudes into the cavity, and protrudes from the third cavity wall 21c configured with the matching end surface 12b. Therefore, by connecting the inner wall surface of the matching segment 12a2 with the first forming surface 13a and smoothly transitioning, the side of the second segment 222 close to the first segment 221 does not need to be aligned with the third cavity wall 21c, thereby further improving the step problem caused by the machining error and the assembly error.

[0054] Exemplarily, referring to Figure 3 , the cross-sectional area of the matching segment 12a2 perpendicular to the first direction is greater than the cross-sectional area of the main body segment 12a1 perpendicular to the first direction, thereby facilitating the fastener to be screwed into the main body segment 12a1 from the matching segment 12a2. Correspondingly, the cross-sectional area of the second segment 222 of the insert pin 22 is greater than the cross-sectional area of the first segment 221.

[0055] Exemplarily, referring toFigure 3 The main body section 12a1 comprises a first sub-section 12a11 and a second sub-section 12a12 between the first sub-section 12a11 and the mating section 12a2, and the cross-sectional area of the second sub-section 12a12 perpendicular to the first direction gradually increases in a direction away from the first sub-section 12a11.

[0056] The second sub-section 12a12 is used for guiding and positioning the fastener, and when the fastener is screwed in, the second sub-section 12a12 can automatically align the fastener to the center of the first sub-section 12a11, avoiding the fastener from deviating, and also preventing the fastener from damaging the thread in the first sub-section 12a11.

[0057] In the description of the present application, the description of the terms “in an embodiment”, “in some embodiments”, “in another embodiment”, “in yet another embodiment”, or “exemplary” means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the exemplary description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined by those skilled in the art without contradiction.

[0058] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. An injection molded part characterized by, The injection-molded part comprises: a main body; a connecting column protruding from one side of the main body in a first direction; the connecting column has a mounting hole and a mating end face, the mounting hole penetrates the connecting column from an end thereof away from the main body in the first direction, and the mating end face is located at the end of the connecting column away from the main body in the first direction and on the outer peripheral side of the mounting hole; a positioning portion provided at the end of the connecting column away from the main body in the first direction, the positioning portion being located on the outer peripheral side of the mounting hole and protruding from the mating end face in the first direction; the positioning portion has a first profiled surface located on the side of the positioning portion close to the mounting hole and a second profiled surface located on the side of the positioning portion away from the connecting column in the first direction, the first profiled surface and the second profiled surface are connected, and the intersection of the first profiled surface and the second profiled surface forms an edge line.

2. The injection molded part of claim 1, wherein, The number of the positioning portions is multiple, and the multiple positioning portions are arranged at intervals in the circumferential direction of the mounting hole, and the mating end face is located between two adjacent positioning portions.

3. The injection molded part of claim 2, wherein, The first profiled surface of each positioning portion is fitted with the side wall surface of the same virtual cylinder.

4. The injection molded part according to any one of claims 1 to 3, characterized in that At least one of the opposite sides of the positioning portion in the circumferential direction of the mounting hole has a third profiled surface, and the third profiled surface and the first profiled surface are connected through a chamfer surface.

5. The injection molded part of claim 4, wherein, The width dimension between the third profiled surface and the first profiled surface is not less than 0.5 mm.

6. The injection molded part according to any one of claims 1 to 3, characterized in that The mounting hole comprises a main body section and a mating section, the mating section is located on the side of the main body section close to the positioning portion in the first direction and penetrates the connecting column from the end thereof away from the main body in the first direction, and the inner wall surface of the mating section is smoothly connected with the first profiled surface.

7. The injection molded part of claim 6, wherein, The cross-sectional area of the mating section perpendicular to the first direction is greater than the cross-sectional area of the main body section perpendicular to the first direction. And / or, the main body section comprises a first sub-section and a second sub-section located between the first sub-section and the mating section, and the cross-sectional area of the second sub-section perpendicular to the first direction gradually increases in the direction away from the first sub-section.

8. The injection molded part of claim 6, wherein, The length dimension of the mating section in the first direction is not less than 0.2 mm.

9. The injection molded part according to any one of claims 1 to 3, characterized in that The injection-molded part is an air conditioner panel.

10. An injection mold for manufacturing an injection molded part according to any one of claims 1 to 8, characterized in that The injection mold comprises a mold body having a mold cavity and a pin at least partially arranged in the mold cavity, the injection-molded part is injection molded in the mold cavity, and the pin is used to form the mounting hole and the first profiled surface.

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