Double-material injection molded part

Abstract

The invention provides a two-material injection molded part. The double-material injection molding part comprises a first material part and a second material part, the first material part is provided with a groove and a through hole, the groove has caliber change, and the through hole is located in the groove and penetrates through the groove; the second material piece is provided with a first bearing part, a second bearing part, a first connecting part and a second connecting part, the first bearing part leans against the inner surface of the first material piece, the second bearing part leans against the outer surface of the first material piece, and the first connecting part is connected with the first bearing part and the second bearing part from the upper edge of the first material piece; and the second connecting part penetrates through the through hole and is connected with the first bearing part and the second bearing part.

Description

Technical Field

[0001] This invention relates to a two-material injection molding structure, and more particularly to a two-material injection molded part that can prevent mutual peeling. Background Technology

[0002] Two-component injection molding can directly combine rubber and plastic into one, resulting in a more secure bond compared to the previous interlocking method using convex and concave structures. It also provides a more comfortable feel when used.

[0003] Figure 1A A top view of a two-material injection molded part made using existing methods. Figure 1B for Figure 1A A schematic diagram of the groove in the middle, and Figure 1C for Figure 1A A cross-sectional view of a two-material injection molded part. Please also refer to... Figure 1A , Figure 1B and Figure 1C In existing two-component injection molding processes, soft rubber 1 and hard rubber 2 are joined together in a funnel shape to increase the contact area and prevent the soft and hard rubbers from peeling off after molding. However, while this structural design can prevent the soft rubber 1 and hard rubber 2 from peeling off each other in the X and / or Y directions, it cannot prevent the soft rubber 1 from flipping relative to the hard rubber 2 and peeling off from the hard rubber 2. Summary of the Invention

[0004] This invention relates to a two-material injection molded part, in order to improve upon the deficiencies of the prior art.

[0005] According to the present invention, a two-material injection molded part includes a first material part and a second material part. The first material part has a groove and a through hole. The groove has a variable diameter, and the through hole is located in the groove and penetrates the groove. The second material part has a first bearing portion, a second bearing portion, a first connecting portion, and a second connecting portion. The first bearing portion abuts against the inner surface of the first material part, the second bearing portion abuts against the outer surface of the first material part, the first connecting portion connects the first bearing portion and the second bearing portion from the upper edge of the first material part, and the second connecting portion passes through the through hole and connects the first bearing portion and the second bearing portion.

[0006] In a two-material injection molded part according to an embodiment of the present invention, the hardness of the first material is greater than the hardness of the second material.

[0007] In a two-material injection molded part according to an embodiment of the present invention, the second connecting part is continuous and uninterrupted with the first bearing part and the second bearing part.

[0008] In a two-material injection molded part according to an embodiment of the present invention, the first material is made of plastic, and the second material is made of rubber.

[0009] In a two-material injection molded part according to an embodiment of the present invention, the first material part is a frame and the second material part is a cushioning part. The two-material injection molded part is used to support an article, and the top surface of the cushioning part is higher than the top surface of the article.

[0010] Based on the above, in the two-material injection molded part of the present invention, by changing the diameter of the groove and the through hole penetrating the groove, the second connecting part of the second material part passes through the through hole to connect the first support part and the second support part, so that the second material part is limited in multiple directions relative to the first material part, thereby effectively preventing the second material part from peeling off relative to the first material part. Attached Figure Description

[0011] Figure 1A A top view of a two-material injection molded part produced using existing methods;

[0012] Figure 1B for Figure 1A A schematic diagram of the groove in the middle;

[0013] Figure 1C for Figure 1A A cross-sectional view of a two-material injection molded part;

[0014] Figure 2A This is a schematic diagram of a two-material injection molded frame;

[0015] Figure 2B for Figure 2A A cross-sectional diagram of the AA section line in the diagram;

[0016] Figure 2C for Figure 2B A schematic diagram of the groove in the frame;

[0017] Figure 3 This is a schematic diagram of an item placed in a two-material injection molding frame.

[0018] Explanation of reference numerals in the attached figures

[0019] 1: Soft rubber

[0020] 2: Hard plastic

[0021] 100: Two-material injection molded frame

[0022] 110: Framework

[0023] 110a: Inner surface

[0024] 110b: Outer surface

[0025] 112: Groove

[0026] 112a: Neck constriction

[0027] 114: Through hole

[0028] 120: Buffer

[0029] 120a, 200a: Top surface

[0030] 122: First bearing section

[0031] 124: Second bearing section

[0032] 126: First connecting part

[0033] 128: Second connecting part

[0034] 200: Object

[0035] W: Caliber

[0036] R: Diameter

[0037] X, Y, Z: Direction Detailed Implementation

[0038] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same component reference numerals are used in the drawings and description to denote the same or similar parts.

[0039] The two-material injection molded part of the present invention includes a first material part and a second material part. The first material part has a groove and a through hole. The groove has a variable diameter, and the through hole is located in the groove and penetrates the groove. The second material part has a first bearing portion, a second bearing portion, a first connecting portion, and a second connecting portion. The first bearing portion abuts against the inner surface of the first material part, the second bearing portion abuts against the outer surface of the first material part, the first connecting portion connects the first bearing portion and the second bearing portion from the upper edge of the first material part, and the second connecting portion passes through the through hole and connects the first bearing portion and the second bearing portion.

[0040] Specifically, in one embodiment of the present invention, the above-mentioned two-material injection molded part can be specifically implemented as a two-material injection molded frame 100, and the article 200 (shown in...) Figure 3 ) can be placed in this two-material injection molding frame 100, wherein the item 200 (shown in Figure 3 This could be an electronic device such as a tablet or smartphone that requires protection using a two-piece injection molded frame 100; or, an article 200 (shown in...) Figure 3 It can also be a non-electronic device that needs to be protected by a two-material injection molded frame 100.

[0041] Figure 2A A schematic diagram of a two-material injection molded frame. Figure 2B for Figure 2A A cross-sectional diagram of section line AA in the diagram, and Figure 2C for Figure 2B A schematic diagram of the groove in the frame.

[0042] Please refer to Figure 2A , Figure 2B and Figure 2C , the first material is implemented in the form of the frame 110, and the second material is implemented in the form of the buffer 120 on the frame 110.

[0043] Specifically, the frame 110 is formed of a first material, wherein the first material is plastic. The groove 112 of the frame 110 has a variable caliber, and the through hole 114 is located in the groove 112 and penetrates the groove 112.

[0044] In the embodiment, the groove 112 of the frame 110 has a variable caliber, which means that along the Y direction, the caliber W of the groove 112 first gradually decreases and then gradually increases after passing through the necked portion 112a. However, the groove 112 having a variable caliber is not limited to the embodiment, and the groove 112 can also not have the necked portion 112a, and the caliber W of the groove 112 along the Y direction can gradually decrease, gradually increase, or have a shape change according to other requirements.

[0045] The through hole 114 penetrates the groove 112 along the Z direction. In one embodiment, the diameter of the through hole 114 can remain constant, that is, the diameter of the through hole 114 does not change; or in another embodiment, the diameter of the through hole 114 can also change. In the embodiment, along the Z direction, the diameter R of the through hole 114 is gradually decreased.

[0046] The buffer 120 is formed of a second material, wherein the second material is rubber, and the hardness of the buffer 120 formed of rubber is less than the hardness of the frame 110 formed of plastic.

[0047] The buffer 120 has a first abutting portion 122, a second abutting portion 124, a first connecting portion 126, and a second connecting portion 128, wherein the first abutting portion 122 abuts against the inner surface 110a of the frame 110, the second abutting portion 124 abuts against the outer surface 110b of the frame 110, the first connecting portion 126 connects the first abutting portion 122 and the second abutting portion 124 from the upper edge of the frame 110, and the second connecting portion 128 connects the first abutting portion 122 and the second abutting portion 124 through the through hole 114.

[0048] The design of the groove 112 of the frame 110 having a variable caliber allows the buffer 120 to be restricted from moving relative to the frame 110 in the X direction or the Y direction.

[0049] In particular, since the frame 110 and the buffer 120 are formed by means of two-material injection molding, the second connecting portion 128 formed in the through hole 114 and the first abutting portion 122 abutting against the inner surface 110a of the frame 110 and the second abutting portion 124 abutting against the outer surface 110b of the frame 110 form a continuous and uninterrupted structure. The continuous and uninterrupted structure herein refers to a structure in which the first abutting portion 122, the second connecting portion 128 and the second abutting portion 124 are not disconnected or reconnected.

[0050] In this way, the buffer 120 is simultaneously restricted from moving relative to the frame 110 in the Z direction.

[0051] Therefore, the buffer 120 is fixed to the frame 110, and the buffer 120 cannot be peeled off from the frame 110 in any of the X direction, the Y direction and the Z direction.

[0052] Figure 3 A schematic view of an article placed in a two-material injection molding frame. Please refer to Figure 3 When the article 200 is placed in the two-material injection molding frame 100, the top surface 120a of the buffer 120 is higher than the top surface 200a of the article 200. In this way, the buffer 120 can achieve the effect of protecting the article 200.

[0053] In summary, in the two-material injection molding frame of the embodiments of the present application, by changing the caliber of the groove and designing the through hole to penetrate the groove, the second material part is limited in three directions relative to the first material part, and the second material part can be effectively prevented from being peeled off relative to the first material part.

[0054] In addition, the two-material injection molding frame is realized in the form of a two-material injection molding frame, which not only prevents the buffer from being peeled off relative to the frame, but also provides the effect of protecting and buffering the article placed in the two-material injection molding frame.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the claims of the present application.

Claims

1. A two-material injection molded part, characterized in that, Comprising: a first material piece having a recess with a varying diameter and a through hole located in and penetrating the recess; and a second material piece having a first abutting portion abutting an inner surface of the first material piece, a second abutting portion abutting an outer surface of the first material piece, a first connecting portion connecting the first and second abutting portions from an upper edge of the first material piece, and a second connecting portion connecting the first and second abutting portions through the through hole. The first material piece has a hardness greater than that of the second material piece.

2. The dual injection molded part of claim 1, wherein, The second connecting portion is continuous and uninterrupted with the first and second abutting portions.

3. The dual injection molded part of claim 1, wherein, The first material piece is made of plastic and the second material piece is made of rubber.

4. The dual injection molded part of claim 1, wherein, The first material piece is a frame and the second material piece is a cushioning piece, the dual-material injection-molded piece is used for carrying an article, and a top surface of the cushioning piece is higher than a top surface of the article.

5. The dual injection molded part of claim 1, wherein, ​

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