Injection molding structure
By using a combination of limiting holes and bosses in the injection molding structure, the problems of displacement and cracking in two-color injection molded products during the two-shot injection molding process are solved, improving the bonding strength and fixing reliability, and enhancing the injection molding quality and product yield.
Patent Information
- Application Number
- CN202520367865.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Two-color injection molded products are prone to displacement and cracking at the joint during the two-shot injection molding process, resulting in low bonding strength and affecting the reliability and stability of the product.
The design employs a limiting hole and a boss. The limiting hole penetrates through the first injection molded part, and the boss matches the limiting hole. Due to the different materials, the height of the boss is less than the depth of the limiting hole, which improves the bonding strength and prevents relative displacement between the injection molded part and the rear mold.
It improves the reliability and stability of the injection molding structure, avoids displacement of the injection molded part with the rear mold during the injection process, and improves injection molding quality and product yield.
Smart Images
Figure CN223725051U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the present application relates to the injection molding technical field, in particular to an injection molding structure. BACKGROUND
[0002] In the two-shot injection molding process, the first shot is prone to displacement due to the injection pressure, resulting in the skin surface being rough; meanwhile, the two-shot and the first shot are designed to be interference lapped, resulting in the cracking phenomenon often occurring at the joint of the two-shot and the first shot, and the bonding strength is not high. CONTENT OF THE UTILITY MODEL
[0003] Therefore, the embodiment of the present application provides an injection molding structure, which improves the bonding strength of the first injection molding part and the second injection molding part, thereby improving the reliability and stability of the injection molding structure. On the other hand, the relative displacement of the first injection molding part and the back mold during the injection molding process can be avoided.
[0004] In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present application is as follows:
[0005] In one aspect, the present application provides an injection molding structure, which is an integral part and comprises: a first injection molding part, the first injection molding part having a limiting hole penetrating through the first injection molding part along the thickness direction of the first injection molding part; and a second injection molding part, the second injection molding part being different in material from the first injection molding part, the second injection molding part having a boss matched with the limiting hole, and the height of the boss being less than the depth of the limiting hole.
[0006] The injection molding structure provided by the embodiment of the present application has the limiting hole penetrating through the first injection molding part along the thickness direction of the first injection molding part on the first injection molding part, the second injection molding part being different in material from the first injection molding part, the second injection molding part having the boss matched with the limiting hole, and the height of the boss being less than the depth of the limiting hole. On the one hand, the bonding strength of the first injection molding part and the second injection molding part is improved, thereby improving the reliability and stability of the injection molding structure. On the other hand, the relative displacement of the first injection molding part and the back mold during the injection molding process is avoided, thereby improving the fixing reliability of the first injection molding part and the back mold, improving the injection molding quality, and improving the quality and yield of the product.
[0007] In some embodiments of the present application, the height of the boss is h1, the depth of the limiting hole is h2, and h1 / h2 is 0.5-0.85.
[0008] In some embodiments of the present application, the diameter of the limiting hole is 1mm-2mm.
[0009] In some embodiments of the present application, the limiting holes are spaced apart, and the boss corresponds to the limiting holes one by one.
[0010] In some embodiments of the present application, the limiting holes are a plurality of limiting holes arranged at intervals along the length direction of the splicing surface of the first injection molded piece and the second injection molded piece, and the boss is a plurality of bosses corresponding to the plurality of limiting holes.
[0011] In some embodiments of the present application, the distance between any two adjacent limiting holes is less than or equal to 55 mm.
[0012] In some embodiments of the present application, the limiting hole is arranged at the edge of the first injection molded piece, and the second injection molded piece extends along the edge of the first injection molded piece.
[0013] In some embodiments of the present application, the first injection molded piece includes a first body and a first protrusion arranged on the peripheral wall of the first body, the surface on one side of the thickness direction of the first body is a first surface, the surface of the first protrusion close to the first surface is spaced apart from the first surface and forms a first matching surface, the limiting hole is arranged on the first matching surface and penetrates the first protrusion, the second injection molded piece includes a second body and a second protrusion arranged on the side wall of the second body facing the first injection molded piece, the surface on one side of the thickness direction of the second body is a second surface, the first surface and the second surface are spaced apart in the thickness direction of the first body, the surface of the second protrusion close to the second surface is spaced apart from the second surface and forms a second matching surface, the second matching surface is attached to the first matching surface, and the boss is arranged on the second matching surface.
[0014] In some embodiments of the present application, the first surface is flush with the side surface of the second protrusion away from the second matching surface; and / or, the second surface is flush with the side surface of the first protrusion away from the first matching surface.
[0015] In some embodiments of the present application, one of the first injection molded piece and the second injection molded piece is a hard rubber piece, and the other is a soft rubber piece.
[0016] The above description is only a summary of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, the embodiments can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The perspective view of the injection molded structure provided by the embodiments of the present application is shown;
[0018] Figure 2 The perspective view of the injection molded structure provided by the embodiments of the present application is shown; Figure 1 The enlarged view of A in FIG. 4;
[0019] Figure 3 for Figure 1 a sectional view at B-B;
[0020] Figure 4 for Figure 1 a sectional view at C-C;
[0021] Figure 5 a perspective view of a first injection part of the injection structure provided in the embodiments of the present application;
[0022] Figure 6 for Figure 5 a sectional view at D-D;
[0023] Figure 7 a perspective view of a second injection part of the injection structure provided in the embodiments of the present application;
[0024] Figure 8 for Figure 7 a sectional view at E-E.
[0025] Reference signs:
[0026] 10, injection structure;
[0027] 1, first injection part; 11, limiting hole; 12, first body; 121, first surface; 13, first protrusion; 131, first mating surface;
[0028] 2, second injection part; 21, boss; 22, second body; 221, second surface; 23, second protrusion; 231, second mating surface. DETAILED DESCRIPTION
[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the specific technical solutions of the present application with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application, but not to limit the scope of the present application.
[0030] In the embodiments of the present application, the terms “first” and “second” are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of “a plurality of” is two or more.
[0031] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", "left" and "right" are defined relative to the orientation in which the components in the drawings are placed, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation in which the components in the drawings are placed.
[0032] In the embodiments of the present application, unless specifically defined and limited otherwise, the term "connection" should be understood in a broad sense, for example, the "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.
[0033] In the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or further includes elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.
[0034] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of "exemplary" or "for example" is intended to present concepts in a concrete manner.
[0035] The following refers to Figures 1-8 The injection molding structure 10 provided by the embodiments of the present application is described.
[0036] In a first aspect, as shown in Figures 1-8 The injection molding structure 10 provided by the embodiments of the present application includes a first injection molding piece 1 and a second injection molding piece 2.
[0037] Specifically, referring to Figures 1-8 The injection molding structure 10 is an integral piece, and the first injection molding piece 1 has a limiting hole 11 penetrating through the first injection molding piece 1 in the thickness direction of the first injection molding piece 1; the second injection molding piece 2 is made of a material different from that of the first injection molding piece 1, and the second injection molding piece 2 has a boss 21 cooperating with the limiting hole 11.
[0038] It should be noted that the injection molding structure 10 is a two-color injection molding part, one of the first injection molding part 1 and the second injection molding part 2 is a one-shot structure (a structure formed in the first injection molding stage), and the other is a two-shot structure (a structure formed in the second injection molding stage). One shot usually forms the basic structure or main part of the injection molding structure 10. After the part is cooled and solidified in the mold, the mold is rotated or moved to prepare for two shots. Two shots are after the completion of one shot, the mold is rotated or moved to a new position, and then the second plastic is injected into another part of the mold. For example, in this application, the first injection molding part 1 is one shot, and the second injection molding part 2 is two shot.
[0039] It can be understood that through the cooperation of the boss 21 and the limiting hole 11, the connection reliability of the first injection molding part 1 and the second injection molding part 2 is improved, thereby improving the bonding strength of the first injection molding part 1 and the second injection molding part 2, and improving the reliability and stability of the injection molding structure 10.
[0040] Further, as shown in Figure 3 、 Figure 6 and Figure 8 , the height of the boss 21 is less than the depth of the limiting hole 11, so that part of the back mold can be located in the limiting hole 11, avoiding relative displacement of the first injection molding part 1 and the back mold during the injection molding process, thereby improving the fixing reliability of the first injection molding part 1 and the back mold, improving the injection molding quality, and improving the product quality and yield.
[0041] The injection molding structure 10 provided by the embodiment of the application has the limiting hole 11 penetrating the first injection molding part 1 in the thickness direction of the first injection molding part 1; the second injection molding part 2 is different in material from the first injection molding part 1, and the second injection molding part 2 has the boss 21 cooperating with the limiting hole 11, and the height of the boss 21 is less than the depth of the limiting hole 11. On the one hand, the bonding strength of the first injection molding part 1 and the second injection molding part 2 is improved, thereby improving the reliability and stability of the injection molding structure 10. On the other hand, the relative displacement of the first injection molding part 1 and the back mold during the injection molding process is avoided, thereby improving the fixing reliability of the first injection molding part 1 and the back mold, improving the injection molding quality, and improving the product quality and yield.
[0042] In some embodiments of the application, as shown in Figure 3 、 Figure 6 and Figure 8As shown, the height of the boss 21 is h1, the depth of the limiting hole 11 is h2, and h1 / h2 is 0.5-0.85, for example, h1 / h2 can be 0.5, 0.6, 0.7, or 0.85, etc. Thus, the depth of the boss 21 in the limiting hole 11 can be moderate, on the one hand, the connection area between the boss 21 and the hole wall of the limiting hole 11 is ensured, thereby ensuring the fixing reliability of the boss 21 in the limiting hole 11, avoiding the boss 21 from sliding out of the limiting hole 11. On the other hand, the volume of the back mold in the limiting hole 11 is also ensured, thereby ensuring the fixing reliability between the back mold and the first injection molding part 1, avoiding the relative displacement between the first injection molding part 1 and the back mold during the injection molding process.
[0043] In some embodiments of the present application, as shown in Figure 3 、 Figure 6 and Figure 8 , the diameter of the limiting hole 11 is 1-2 mm, for example, 1 mm, 1.5 mm, 1.8 mm, or 2 mm, etc.
[0044] It can be understood that, since the boss 21 is connected (injection connection) with the hole wall of the limiting hole 11, the diameter of the boss 21 is approximately equal to the diameter of the limiting hole 11, that is, the diameter of the boss 21 is also 1-2 mm. Thus, the diameter of the boss 21 is moderate, on the one hand, it can ensure that the boss 21 has sufficient strength to avoid breaking, and at the same time, it can also ensure the contact connection area between the boss 21 and the hole wall of the limiting hole 11, thereby ensuring the fixing reliability of the boss 21 in the limiting hole 11, avoiding the boss 21 from sliding out of the limiting hole 11. On the other hand, it can avoid the diameter of the limiting hole 11 being too large, thereby causing the structure of the first injection molding part 1 to be reduced.
[0045] In some embodiments of the present application, as shown in Figures 1-3 , the limiting hole 11 is spaced apart, and the boss 21 is one-to-one corresponding to the plurality of limiting holes 11. Thus, on the one hand, it further improves the bonding strength of the first injection molding part 1 and the second injection molding part 2, thereby improving the reliability and stability of the injection molding structure 10. On the other hand, it further avoids the relative displacement between the first injection molding part 1 and the back mold during the injection molding process, thereby improving the fixing reliability between the first injection molding part 1 and the back mold, improving the injection molding quality, and improving the product quality and yield.
[0046] In some embodiments of the present application, as shown in Figures 1-3 、 Figure 5 and Figure 7As shown, the limiting holes 11 are multiple and arranged along the length direction of the joint surface of the first injection molding part 1 and the second injection molding part 2, and the bosses 21 are multiple and correspond to the limiting holes 11 one by one. In this way, on the one hand, the combination strength of the first injection molding part 1 and the second injection molding part 2 is further improved, thereby improving the reliability and stability of the injection molding structure 10. On the other hand, the relative displacement of the first injection molding part 1 and the back mold during the injection molding process is further avoided, thereby improving the fixing reliability of the first injection molding part 1 and the back mold, improving the injection molding quality, and improving the product quality and yield.
[0047] In some embodiments of the present application, as shown in Figures 1-3 , Figure 5 The spacing between any two adjacent limiting holes 11 is less than or equal to 55 mm, for example, 55 mm, 50 mm, 45 mm, 40 mm, etc. In this way, the arrangement of the limiting holes 11 is more dense, and more limiting holes 11 can be provided on the first injection molding part 1 within a limited length.
[0048] In some embodiments of the present application, as shown in Figures 1-3 , Figure 5 and Figure 7 The limiting hole 11 is arranged at the edge of the first injection molding part 1, and the second injection molding part 2 extends along the edge of the first injection molding part 1. It can be understood that since the second injection molding part 2 extends along the edge of the first injection molding part 1, the limiting hole 11 is arranged at the edge of the first injection molding part 1, and the protrusion is arranged on the side of the second injection molding part 2 facing the first injection molding part 1, thereby facilitating the cooperation of the protrusion and the limiting hole 11.
[0049] In some embodiments of the present application, as shown in Figures 1-4 The first injection molding part 1 includes a first body 12 and a first protrusion 13, the first protrusion 13 is arranged on the peripheral wall of the first body 12, the surface on one side of the first body 12 in the thickness direction is a first surface 121, the surface of the first protrusion 13 close to the first surface 121 is spaced apart from the first surface 121 and forms a first cooperation surface 131, and the limiting hole 11 is arranged on the first cooperation surface 131 and penetrates the first protrusion 13.
[0050] Further, as shown in Figures 1-4 The second injection molding part 2 includes a second body 22 and a second protrusion 23, the second protrusion 23 is arranged on the side wall of the second body 22 facing the first injection molding part 1, the surface on one side of the second body 22 in the thickness direction is a second surface 221, the first surface 121 and the second surface 221 are spaced apart in the thickness direction of the first body 12, the surface of the second protrusion 23 close to the second surface 221 is spaced apart from the second surface 221 and forms a second cooperation surface 231, the second cooperation surface 231 is attached to the first cooperation surface 131, and the boss 21 is arranged on the second cooperation surface 231.
[0051] It can be understood that the first fitting surface 131 and the second fitting surface 231 are formed as the splicing surfaces of the first injection molding part 1 and the second injection molding part 2, and the first injection molding part 1 and the second injection molding part 2 can form a counterpart in the thickness direction of the first injection molding part 1 through the lamination of the first fitting surface 131 and the second fitting surface 231, so that the first injection molding part 1 and the second injection molding part 2 can be prevented from moving towards each other in the thickness direction of the first injection molding part 1, thereby improving the connection reliability of the first injection molding part 1 and the second injection molding part 2.
[0052] In addition, through the lamination of the first fitting surface 131 and the second fitting surface 231, the second protrusion 23 can utilize the space in the thickness direction of the first injection molding part 1, and compared with the case that the second protrusion 23 is stacked on one side of the first body 12 in the thickness direction, the thickness of the injection molding structure 10 is smaller.
[0053] In some embodiments of the present application, as shown in Figure 1 and Figure 4 the first surface 121 is flush with the side surface of the second protrusion 23 away from the second fitting surface 231, so that the side of the injection molding structure 10 facing the first surface 121 can be flat, thereby facilitating injection molding.
[0054] In some embodiments of the present application, as shown in Figure 1 and Figure 4 the second surface 221 is flush with the side surface of the first protrusion 13 away from the first fitting surface 131. Thus, the side of the injection molding structure 10 facing the second surface 221 can be flat, thereby facilitating injection molding.
[0055] In some embodiments of the present application, one of the first injection molding part 1 and the second injection molding part 2 is a hard rubber part, and the other is a soft rubber part. Thus, the injection molding structure 10 is a combined structure of a hard rubber part and a soft rubber part, thereby meeting different product requirements. For example, in the present application, the first injection molding part 1 is a hard rubber part, and the second injection molding part 2 is a soft rubber part, but the present application is not limited thereto, and the first injection molding part 1 can be a soft rubber part, and the second injection molding part 2 can be a hard rubber part.
[0056] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow conversion, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An injection molded structure, characterized by, The injection molding structure is an integral piece and comprises: a first injection molding piece having a limiting hole penetrating through the first injection molding piece along a thickness direction of the first injection molding piece; a second injection molding piece different in material from the first injection molding piece, the second injection molding piece having a boss matched with the limiting hole, a height of the boss being less than a depth of the limiting hole.
2. The injection molded structure of claim 1, wherein, The height of the boss is h1, the depth of the limiting hole is h2, and h1 / h2 is 0.5-0.
85.
3. The injection molded structure of claim 1, wherein, The diameter of the limiting hole is 1-2 mm.
4. The injection molded structure of claim 1, wherein, The limiting hole is a plurality of limiting holes spaced apart, and the boss is a plurality of bosses corresponding to the plurality of limiting holes.
5. The injection molded structure of claim 4, wherein, The limiting hole is a plurality of limiting holes spaced apart along a length direction of a splicing surface of the first injection molding piece and the second injection molding piece, and the boss is a plurality of bosses corresponding to the plurality of limiting holes.
6. Injection molded structure according to claim 4 or 5, characterized in that A spacing between any two adjacent limiting holes is less than or equal to 55 mm.
7. The injection molded structure of claim 1, wherein, The limiting hole is provided on an edge of the first injection molding piece, and the second injection molding piece extends along the edge of the first injection molding piece.
8. The injection molded structure of claim 7, wherein, The first injection molding piece comprises a first body and a first protrusion, the first protrusion is provided on a peripheral wall of the first body, a surface on one side of the first body in a thickness direction is a first surface, a surface of the first protrusion close to the first surface is spaced apart from the first surface and forms a first matching surface, the limiting hole is provided on the first matching surface and penetrates through the first protrusion, The second injection molding piece comprises a second body and a second protrusion, the second protrusion is provided on a side wall of the second body facing the first injection molding piece, a surface on one side of the second body in a thickness direction is a second surface, the first surface and the second surface are spaced apart in the thickness direction of the first body, a surface of the second protrusion close to the second surface is spaced apart from the second surface and forms a second matching surface, the second matching surface is attached to the first matching surface, and the boss is provided on the second matching surface.
9. The injection molded structure of claim 8, wherein, The first surface is flush with a side surface of the second protrusion away from the second matching surface; and / or, the second surface is flush with a side surface of the first protrusion away from the first matching surface.
10. The injection molded structure of claim 1, wherein, One of the first injection molding piece and the second injection molding piece is a hard rubber piece, and the other is a soft rubber piece.