Tooth-shaped bonding glue path structure

Abstract

The utility model discloses a tooth-shaped bonding glue path structure which is arranged on a plastic part, the plastic part comprises a first part and a second part which are bonded with each other, the first part and the second part are respectively provided with a tooth-shaped structure at the bonding position, and the tooth-shaped structure of the first part or the second part is coated with an adhesion promoter. The first part and the second part are mutually meshed and fixed through the tooth-shaped structures during bonding, the tooth-shaped structures are arranged at the bonding positions of the plastic parts needing to be bonded, the problem that thick and thin glue stress marks are generated is avoided, glue applying is not affected, meanwhile, the bonding face is effectively increased, and the bonding strength is improved; and due to dense tooth-shaped distribution, only a three-axis dispensing machine is needed for dispensing, so that the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a toothed adhesive path structure for avoiding generation of injection molding thick and thin glue stress marks. Background Art

[0002] At present, injection molded products are often assembled by glue dispensing. Depending on the complexity of the glue dispensing path, different glue dispensing machines are needed to implement glue dispensing (specifically, there are three-axis, four-axis, five-axis glue dispensing, etc., and the prices of different glue dispensing machines are different). Commonly used methods for glue dispensing and bonding plastic products are: 1. Use a three-axis glue dispensing machine and set a glue groove step on the bonding part. Please refer to Figure 1 , Figure 2 As shown, the dispensing process parameters are simple to control, with high efficiency and yield; but the disadvantage is that the wall thickness will be uneven due to the steps, and injection molding is very likely to produce thick and thin glue stress marks. 2. The use of four-axis / five-axis dispensing machines can be applied to more complex glue path designs. However, the dispensing process parameters need to be precisely controlled (often limited by many production conditions), and the cost and defect rate increase. Utility Model Content

[0003] In view of the above technical problems, the utility model provides a serrated adhesive path structure which aims to avoid the generation of injection molding thick and thin adhesive stress marks, does not affect the adhesive application, and effectively increases the bonding surface and increases the bonding strength.

[0004] An embodiment of the utility model provides a toothed adhesive path structure, which is arranged on a plastic part, wherein the plastic part includes a first part and a second part bonded to each other, wherein the first part and the second part are respectively provided with a toothed structure at the bonding position, and the toothed structure of the first part or the second part forms a continuous adhesive path, wherein the adhesion promoter is applied to the adhesive path, and the first part and the second part are interlocked and fixed to each other through the toothed structure during bonding.

[0005] Optionally, the adhesion promoter is glue.

[0006] Optionally, the glue is injected into the glue path through a glue nozzle.

[0007] Optionally, the plastic part includes a plastic part body and a cover body, and the second part is the plastic part body.

[0008] Optionally, the first part is a cover body.

[0009] Optionally, the first part is fixedly connected to the cover body, and the first part is placed in the plastic body.

[0010] Optionally, a first fixing hole is provided on the first part, a second fixing hole corresponding to the first fixing hole is provided on the cover body, and the fixing member passes through the first fixing hole and the second fixing hole to fix the first part and the cover body.

[0011] Optionally, a sealing gasket is further provided between the cover body and the first part, and a third fixing hole corresponding to the first fixing hole and the second fixing hole is provided on the sealing gasket.

[0012] Optionally, the fixing member is a bolt.

[0013] In the technical solution provided by the embodiment of the utility model, the plastic part includes a first part and a second part bonded to each other, and the first part and the second part are respectively provided with a toothed structure at the bonding position, and an adhesion promoter is coated on the toothed structure of the first part or the second part, and the first part and the second part are fixed to each other by the toothed structure during bonding. Compared with the prior art, the present application avoids the problem of stress marks caused by thick and thin glue by providing a toothed structure at the bonding position of the plastic part to be bonded, does not affect the gluing, and effectively increases the bonding surface and increases the bonding strength. Due to the denser tooth distribution, only a three-axis dispensing machine is needed for dispensing, which saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a structural schematic diagram of a method for gluing and bonding an injection molded product in the prior art.

[0015] Figure 2 The present invention is a schematic diagram of the structure of the glue point in the glue point bonding assembly method of the injection molded product in the prior art.

[0016] Figure 3 It is a structural schematic diagram of one embodiment of a toothed adhesive path structure of the utility model.

[0017] Figure 4 It is a structural schematic diagram of another embodiment of a toothed adhesive path structure of the utility model.

[0018] Figure 5 The utility model is a structural schematic diagram of a dispensing part of a toothed adhesive path structure. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0020] It should be noted that when an element is described as being "connected" or "connected to" another element, it may be directly connected to the other element, or one or more intermediate elements may exist therebetween. The terms "upper", "lower", "inner", "outer", etc. used in this specification indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0021] Please refer to Figure 1 , Figure 2 The figure shows the existing glue dispensing and bonding assembly method of injection molded products. The existing technology uses a three-axis glue dispensing machine and sets a glue groove step on the adhesive part. However, the glue groove step will cause uneven wall thickness, and injection molding is very likely to produce thick and thin glue stress marks. In order to solve the above problems, the utility model provides a toothed bonding glue path structure, which is arranged on a plastic part. The plastic part includes a first part and a second part that are bonded to each other. The first part and the second part are respectively provided with a toothed structure at the bonding position. The toothed structure of the first part or the second part forms a continuous glue path that can be glued. The adhesion promoter is applied to the glue path that can be glued. The first part and the second part are fixed to each other by the toothed structure during bonding.

[0022] In one embodiment of the present invention, the adhesion promoter is glue, and the glue is injected into the glue path through a glue nozzle.

[0023] The plastic part includes a plastic body and a cover. Please refer to Figure 3-Figure 5 As shown, the second part is a plastic body 2 , and a circle of toothed structures 21 are provided at the bonding position inside the plastic body 2 for bonding and fixing with the cover body 4 , and an adhesion promoter, such as glue, is coated on the toothed structures 21 .

[0024] In one embodiment of the present invention, a circle of tooth-shaped structures is disposed at the bonding position inside the cover body 4 for interlocking and fixing with the tooth-shaped structures 21 inside the plastic body 2 during bonding.

[0025] In one embodiment of the present invention, please refer to Figure 3 , Figure 4As shown, the first part 1 is fixed to the cover body 4, the first part 1 is placed in the plastic body 2, a plurality of first fixing holes 12 are provided on the first part 1, the cover body 4 is provided with second fixing holes 41 corresponding to the first fixing holes 12, and the fixing member 6 passes through the first fixing holes 12 and the second fixing holes 41 to fix the first part 1 and the cover body 4. The tooth structure 11 of the first part 1 is meshed with the tooth structure 21 in the plastic body 2, and the first part 1 and the plastic body 2 are bonded and fixed by the adhesion promoter applied to the tooth structure 21, so as to achieve the fixation of the cover body 4 and the plastic body 2.

[0026] In one embodiment of the utility model, a sealing structure is also provided in the cover body 4. Specifically, a sealing gasket 5 is provided between the cover body 4 and the first part 1. The sealing gasket 5 is provided with a third fixing hole 51 corresponding to the first fixing hole 12 and the second fixing hole 41. The fixing member 6 passes through the second fixing hole 41, the third fixing hole 51 and the first fixing hole 12 in sequence to fix and assemble the cover body 4, the sealing gasket 5 and the first part 1, and form a waterproof sealing cavity. The tooth structure 11 of the first part 1 is meshed with the tooth structure 21 in the plastic body 2. The three-axis dispensing machine can be used to simply and conveniently apply hot melt glue to the tooth top of the tooth structure 21 to form a continuous glue path. After the first part 1 is placed in the plastic body 2, they are firmly bonded together to form a component, thereby achieving the fixation of the cover body 4 and the plastic body 2.

[0027] In the present invention, specifically, the fixing member 6 is a bolt, and the number of the first fixing holes 12 is related to the shape of the cross section of the plastic body 2. For example, when the cross section of the plastic body 2 is a triangle, the number of the first fixing holes 12 is preferably 3, and when the cross section of the plastic body 2 is a quadrilateral, the number of the first fixing holes 12 is preferably 4. The shape of the sealing gasket 5 is preferably the same as or similar to the shape of the cross section of the plastic body 2.

[0028] The utility model bonds the parts that need to be bonded in the plastic products to each other (not limited to two parts). The bonding part of each part is composed of a group of tooth-like structures. These tooth-like structures are alternately distributed to form a continuous glue path on the part. During the injection molding process, the plastic is injected into the tooth-like glue path structure through the glue nozzle and distributed along the glue path. Due to the alternating distribution of the tooth-like structures, the glue can be more evenly distributed on the surface of the product, thereby avoiding the problem of thick and thin glue stress marks. Due to the denser tooth distribution, only a three-axis glue dispensing machine is needed to dispense glue, which saves costs. The hot melt PU glue can be hung on each tooth without breaking the glue, ensuring that there is glue on the bonding surface. The other two adhesive parts are both provided with the tooth-like structure at the bonding point, and they bite each other during bonding, greatly improving the bonding strength. The present application eliminates the stress marks of thick and thin glue, the molding dimensions are stable and consistent, and it has higher bonding strength and better appearance quality.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A toothed adhesive path structure, arranged on a plastic part, characterized in that: The plastic part includes a first part, a second part and an adhesion promoter which are bonded to each other. The first part and the second part are respectively provided with tooth structures at the bonding positions. The tooth structures of the first part or the second part form a continuous adhesive path. The adhesion promoter is applied to the adhesive path. The first part and the second part are interlocked and fixed to each other through the tooth structures during bonding.

2. The toothed adhesive path structure according to claim 1, characterized in that: The adhesion promoter is glue.

3. The toothed adhesive path structure according to claim 2, characterized in that: The glue is injected into the glue path through a glue nozzle.

4. The toothed adhesive path structure according to claim 1, characterized in that: The plastic part comprises a plastic part body and a cover body, and the second part is the plastic part body.

5. The toothed adhesive path structure according to claim 4, characterized in that: The first part is a cover.

6. The toothed adhesive path structure according to claim 4, characterized in that: The first part is fixedly connected to the cover body, and the first part is placed in the plastic body.

7. The toothed adhesive path structure according to claim 6, characterized in that: The first part is provided with a first fixing hole and a fixing member, the cover body is provided with a second fixing hole corresponding to the first fixing hole, and the fixing member passes through the first fixing hole and the second fixing hole to fix the first part and the cover body.

8. The toothed adhesive path structure according to claim 7, characterized in that: A sealing gasket is further arranged between the cover body and the first part, and a third fixing hole corresponding to the first fixing hole and the second fixing hole is arranged on the sealing gasket.

9. The toothed adhesive path structure according to claim 7, characterized in that: The fixing member is a bolt.

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