Glue sealing structure with hard glue wrapped by soft glue

Abstract

The utility model belongs to the technical field of injection molding structures, and particularly relates to a glue sealing structure with hard glue wrapped by soft glue. Comprising a hard rubber layer and a soft rubber layer, at least one through hole is formed in the hard rubber layer, a boss is arranged on the edge of the through hole and protrudes out of one side of the bottom face of the hard rubber layer, a soft rubber combination face is arranged on the upper surface of the hard rubber layer, and the soft rubber layer is combined with the hard rubber layer into a whole through the soft rubber combination face and wraps the through hole. A single-layer structure is formed at the through hole; according to the utility model, the boss is arranged at the edge of the through hole and is propped against a mold in the injection molding process to play a role in propping, so that the condition that soft rubber is reversely wrapped and turned over in the rubber injection process is avoided, full rubber wrapping at the soft rubber combination surface and the through hole is realized, and the aesthetic property of a product is improved. When the produced household articles for children are in contact with the skin during use, the condition that the blocking points hurt the skin is avoided, and the use is more comfortable.

Description

Technical field:

[0001] The utility model belongs to the technical field of injection molding structures, in particular to a sealing structure in which soft glue covers hard glue. Background technology:

[0002] In some products with soft-gel-coated hard-gel, such as the children's household product disclosed in authorization announcement number CN220937870U (application date 2023.11.09, announcement date 2024.05.14), the children's household product includes a hard gel layer and a soft gel layer, the soft gel layer being wrapped around the hard gel layer. The children's household product has a seat and / or backrest, and the hard gel layer corresponding to the seat and / or backrest is provided with a notch. The soft gel layer corresponding to the seat and / or backrest covers the notch and forms a single-layer structure at the notch that contacts the child's buttocks and / or back. This type of product improves on the existing double-gel structure by providing a notch in the hard gel layer where it contacts the buttocks and / or back and wrapping it with a soft gel layer. Since only the soft gel layer is present where it contacts the buttocks and / or back, the comfort of the seat and / or backrest can be greatly improved. At the same time, the hard gel layer outside the notch provides support, giving the children's household product sufficient strength.

[0003] During the injection molding process of the above product, a stop point 2 needs to be set on the hard rubber layer 1 near the notch to increase support (such as Figure 1 As shown, the soft adhesive is prevented from being reversed and overturned, thereby improving product yield. The stop point 3 is made of the same material as the hard adhesive layer 1. The soft adhesive layer 4 injected through the soft adhesive inlet cannot cover the surface of the stop point 3, resulting in the stop point 3 still being visible on the soft adhesive layer 4, which reduces the product's aesthetics. At the same time, the stop point 3 may rub against the child's skin, causing discomfort to the child. Summary of the invention:

[0004] The utility model aims to provide a sealing structure of hard rubber covered by soft rubber, which can eliminate the blocking point and still prevent the soft rubber from being reversed and overturned.

[0005] The utility model is achieved in this way:

[0006] The sealing structure of soft rubber wrapped in hard rubber includes a hard rubber layer and a soft rubber layer. At least one through hole is provided on the hard rubber layer. A boss is provided on the edge of the through hole. The boss protrudes from the bottom side of the hard rubber layer. A soft rubber bonding surface is provided on the upper surface of the hard rubber layer. The soft rubber layer is integrated with the hard rubber layer through the soft rubber bonding surface, and covers the through hole, and forms a single-layer structure at the through hole.

[0007] In the above-mentioned soft-glue-covered hard-glue sealing structure, the soft glue feeding point is located at each through hole.

[0008] In the above-mentioned sealing structure of soft glue encapsulating hard glue, the bosses are provided in a circle along the edge of the through hole, and the circle of bosses is an open-loop or closed-loop structure.

[0009] In the above-mentioned soft-glue-covered hard-glue sealing structure, the boss extends from the hard glue layer toward a direction away from the hard glue layer.

[0010] In the above-mentioned soft-glue-covered hard-glue sealing structure, the cross-section of the boss is L-shaped, including a first part and a second part. The first part and the second part are arranged in an L-shape. The first part connects the hard glue layer and the second part. The upper plane of the second part is lower than the soft glue bonding surface, and the second part extends toward the inside of the through hole.

[0011] In the above-mentioned soft-glue-in-hard-glue sealing structure, an extension portion is extended from the outer edge of the second portion toward a side away from the bottom surface of the hard glue layer.

[0012] The outstanding advantages of the utility model compared with the prior art are:

[0013] The utility model provides a boss on the edge of the through-hole. During the injection molding process, the boss abuts against the mold to provide support. During the injection process, the soft rubber will not be reversed or spilled. The soft rubber joint surface and the through-hole are fully covered with rubber, which improves the aesthetics of the product. Children's household products produced in this way will not have any scratches on the skin when in use, making them more comfortable to use. Description of the drawings:

[0014] Figure 1 is a schematic diagram of background technology;

[0015] Figure 2 is a front schematic diagram of Example 1;

[0016] Figure 3 is a schematic diagram of the back side of Example 1;

[0017] Figure 4 Schematic diagram of a circle of bosses provided on the edge of the through hole of Example 1;

[0018] Figure 5 yes Figure 4 A partial enlarged schematic diagram;

[0019] Figure 6 yes Figure 2 The main view;

[0020] Figure 7 yes Figure 6 AA section view;

[0021] Figure 8 yes Figure 7 A partial enlarged schematic diagram;

[0022] Figure 9 is a schematic diagram of the mold used for injection molding Example 1;

[0023] Figure 10 yes Figure 9 BB cross-sectional view;

[0024] Figure 11 yes Figure 10 A partial enlarged schematic diagram;

[0025] Figure 12 is a schematic diagram of Example 2;

[0026] Figure 13 is a bottom view of Example 2;

[0027] Figure 14 yes Figure 13 CC cross-sectional view;

[0028] Figure 15 yes Figure 14 A partial enlarged schematic diagram;

[0029] Figure 16 yes Figure 13 A partial enlarged schematic diagram.

[0030] In the figure: 10, hard rubber layer; 11, soft rubber layer; 12, through hole; 13, boss; 14, soft rubber bonding surface; 15, soft rubber feeding point; 16, lower mold; 17, upper mold; 18, first part; 19, second part. Specific implementation method:

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] Example 1: See Figure 2-11 :

[0033] This embodiment provides a sealing structure of soft glue wrapped in hard glue, which can be applied to children's household products, such as children's toilet seats, children's plastic sofas, children's plastic reclining boards, etc. Figure 2-11 The device shown is used on a child toilet seat. It includes a hard rubber layer 10 and a soft rubber layer 11. The hard rubber layer 10 is provided with at least one through-hole 12. A boss 13 is provided at the edge of the through-hole 12, protruding from the bottom surface of the hard rubber layer 10. A soft rubber bonding surface 14 is provided on the top surface of the hard rubber layer 10. The soft rubber layer 11 is disposed on this bonding surface 14 and integrally bonded to the hard rubber layer 10, covering the through-hole 12 and forming a single-layer structure at the through-hole 12. A soft rubber inlet point 15 is located at each through-hole 12.

[0034] It should be noted that the hard rubber here generally refers to thermoplastic plastics, such as ABS, PP, POM, PC, PS, PVC, PA, PMMA, etc. Soft rubber generally refers to thermoplastic elastomers, such as TPE, TPR, etc.

[0035] The through hole 12 of this embodiment is relatively large in size, and the soft rubber layer 11 covering the through hole 12 has a larger cross-section, which can improve the comfort of children when using the device.

[0036] The utility model provides a boss 13 on the edge of the through hole 12, which abuts against the mold during the injection molding process to play a supporting role, so that a closed soft rubber layer cavity is formed between the soft rubber joint surface 14 on the hard rubber layer 10 and the lower mold 16, and between the portion of the upper mold 17 passing through the through hole 12 and the lower mold 16. The molten soft rubber enters the soft rubber layer cavity through the soft rubber inlet point 15 until it is full and covers the soft rubber joint surface 14. In this way, during the injection process, the soft rubber will not be turned over, and the soft rubber joint surface 14 and the through hole 12 are fully covered with rubber, which improves the aesthetics of the product. The children's household products produced in this way will not come into contact with the skin when used, and will not cause any problems such as the skin being scratched by the blocking points, making them more comfortable to use.

[0037] Furthermore, the bosses 13 are provided in a circle along the edge of the through hole 12 , and the bosses 13 in a circle are an open loop or a closed loop structure.

[0038] comparison Figure 5 、 Figure 8 and Figure 11 The cross-section of the boss 13 is L-shaped and includes a first portion 18 and a second portion 19. The first portion 18 and the second portion 19 are arranged in an L-shape. The first portion 18 connects the hard rubber layer 10 and the second portion 19. The upper surface of the second portion 19 is lower than the soft rubber bonding surface 14, and the second portion 19 extends toward the interior of the through-hole 12. In this way, the thickness of the soft rubber layer 12 at the second portion 19 is thicker than that at other locations, thereby improving the connection strength between the soft rubber layer 12 and the hard rubber layer 10. In addition, this design can increase the strength of the boss 13, preventing the soft rubber from causing the edge of the through-hole 12 to deform toward the lower mold 16 during injection molding, further preventing the soft rubber from turning over.

[0039] As another embodiment, the boss 13 is L-shaped and has an extension portion extending from the outer edge of the second portion 19 toward the bottom surface of the hard rubber layer 10 to further increase the strength and prevent the soft rubber from being turned over.

[0040] The first portion 18 , the second portion 19 , the hard rubber layer 10 , and the extension portion are an integrated structure made of the same material.

[0041] Example 2: See Figure 12-16 :

[0042] The through hole 12 in this embodiment is relatively small and can be considered a process hole. The purpose is to set a soft glue injection point 15 at the through hole 12. The boss 13 on the edge of the through hole 12 can prevent the soft glue from wrapping over and tipping over. The size of the through hole 12 is set according to the actual situation.

[0043] In this embodiment, the boss 13 is a closed-loop structure, extending downward from the bottom surface of the hard rubber layer 10 .

[0044] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing structure of a hard-coated soft-coated structure, comprising a hard-coated layer (10) and a soft-coated layer (11), characterized in that: At least one through hole (12) is provided on the hard rubber layer (10), a boss (13) is provided on the edge of the through hole (12), and the boss (13) protrudes from one side of the bottom surface of the hard rubber layer (10), and a soft rubber bonding surface (14) is provided on the upper surface of the hard rubber layer (10). The soft rubber layer (11) is integrated with the hard rubber layer (10) through the soft rubber bonding surface (14), and the through hole (12) is covered, and a single-layer structure is formed at the through hole (12).

2. The soft-glue-encapsulated hard-glue sealing structure according to claim 1, characterized in that: The soft glue feeding point (15) is located at each through hole (12).

3. The sealing structure of soft-glue encapsulated hard-glue according to claim 1 or 2, characterized in that: The boss (13) is provided in a circle along the edge of the through hole (12), and the boss (13) is in an open-loop or closed-loop structure.

4. The sealing structure of hard-coated soft-coated plastic according to claim 1 or 2, characterized in that: The boss (13) extends from the hard rubber layer (10) in a direction away from the hard rubber layer (10).

5. The soft-glue-encapsulated hard-glue sealing structure according to claim 4, characterized in that: The cross section of the boss (13) is L-shaped and includes a first portion (18) and a second portion (19). The first portion (18) and the second portion (19) are arranged in an L-shape. The first portion (18) connects the hard rubber layer (10) and the second portion (19). The upper plane of the second portion (19) is lower than the soft rubber bonding surface (14), and the second portion (19) extends toward the inside of the through hole (12).

6. The soft-glue-encapsulated hard-glue sealing structure according to claim 5, characterized in that: An extension portion is provided on the outer edge of the second portion (19) and extends toward a side away from the bottom surface of the hard rubber layer (10).

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