Embedded bolt and embedded nut for rotational molding process

Abstract

The embedded bolt and the embedded nut for the rotational molding process comprise a screw rod, a base is installed at one end of the screw rod, and the base is made of copper alloy or materials with the same performance as the copper alloy; the section of the base is of a polygonal structure. The screw rod is further provided with a rotation stopping structure. According to the embedded bolt and the embedded nut for the rotational molding process, an embedded part can be firmly installed in a plastic part in the rotational molding process, and the strength of the bolt can be improved due to the fact that stainless steel materials are adopted.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and particularly relates to an embedded bolt and an embedded nut for rotational molding. Background Art

[0002] The integral copper bolts and nuts used in the traditional rotational molding process have a torsion resistance and tensile resistance that cannot meet the higher installation requirements of automobiles. At this stage, various automobile manufacturers have begun to take over the wading hoses in the aftermarket and have also put forward higher quality requirements, that is, to develop wading hose products using the rotational molding process, but if the embedded parts still use full-body iron nuts and bolts, it will lead to problems such as poor rotational molding and embedded falling off.

[0003] Based on the molding principle of rotational molding and the quality requirements of various automobile manufacturers for wading hose products, a kind of embedded bolts and embedded nuts used in rotational molding are needed. Utility Model Content

[0004] In view of the above-mentioned problems, the technical purpose of the utility model is to provide an embedded bolt and embedded nut for rotational molding process.

[0005] The utility model is realized by the following technical solutions:

[0006] An embedded bolt for rotational molding process, comprising a screw rod, one end of which is provided with a base, the base being made of copper alloy or a material having equivalent performance;

[0007] The screw rod is also provided with a rotation-stopping structure.

[0008] In some embodiments, a plurality of through grooves are provided on the outer periphery of the base, and the base is made of H59-1 copper alloy.

[0009] In some embodiments, the cross-section of the base is a polygonal structure, such as a hexagonal structure.

[0010] In some embodiments, the anti-rotation structure is a columnar structure with multiple faces, and the anti-rotation structure and the base are an integral structure.

[0011] In some embodiments, the screw is divided into two parts and connected by a rotation-stopping structure.

[0012] In some embodiments, a gap is provided between the anti-rotation structure and the base, and a first groove is also provided on the anti-rotation structure.

[0013] In some embodiments, the screw is made of SUS304 stainless steel or a material with equivalent performance.

[0014] In some embodiments, a second groove is formed on the end surface of the screw away from the anti-rotation structure.

[0015] In some embodiments, the nut is configured as a polygonal structure and can be installed in conjunction with the embedded bolts described above.

[0016] Among them, the embedded nut used in the rotational molding process has a cross-section of a quadrilateral structure, and the connecting angles of adjacent faces are rounded;

[0017] In some embodiments, one end surface of the embedded nut is further provided with an anti-slip disk;

[0018] In some embodiments, the embedded nut is made of copper alloy or a material with equivalent performance.

[0019] The utility model proposes an embedded bolt and embedded nut for rotational molding process, which can facilitate the secure installation of the embedded part in the plastic part during the rotational molding process by adopting different materials and designs of the screw, anti-rotation structure and screw base, and the use of stainless steel material can increase the strength of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the bolt;

[0021] Figure 2 It is a schematic diagram of the structure of a nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The utility model is described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, a pre-embedded bolt for rotational molding process of the present application includes a screw rod 2, one end of which is equipped with a base 5, i.e., the bolt head of the bolt. The base 5 is made of copper alloy or a material with equivalent performance. A stop structure 3 is also provided on the screw rod 2, and the stop structure 3 can improve the torsion resistance of the embedded bolt.

[0027] Among them, the metal material pre-embedded in the plastic is made of copper alloy or a material with equivalent performance to that of copper alloy, mainly a material with similar or better thermal conductivity and bending (flexural) strength, tensile (tensile) strength, compressive strength, impact strength, etc. For example, in some embodiments, the copper alloy is made of H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy.

[0028] In some embodiments, a plurality of through grooves 51 are provided on the periphery of the base 5, so that the rotationally molded plastic colloid can smoothly flow into between the base 5 and the anti-rotation structure to provide a greater clamping force and ensure the anti-torsion force of the embedded bolts in the wading hose.

[0029] In some embodiments, the base 5 is designed as a polygonal structure, which can improve the torsion resistance of the base 5. For example, it is designed as a 4-8 polygon, preferably a hexagon, and the corners of the quadrilateral are 90 degrees. The bonding strength between the right angle position and the rotationally molded plastic colloid will be low. When it exceeds the hexagon, the role of the anti-rotation surface will be limited, resulting in the deterioration of the torsion resistance of the embedded nut.

[0030] In some embodiments, the anti-rotation structure 3 is a columnar structure with multiple faces. The anti-rotation structure 3 and the base 5 are an integral structure, and both are made of copper alloy, such as H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy. The anti-rotation structure 3 is provided with a threaded hole at one end away from the base 5 for threaded connection with the screw 2. It should be noted that it is also possible to connect without threading, and other forms of connection are also possible. Among them, the end face of the screw 2 away from the anti-rotation structure 3 is provided with a second groove 1, which is conducive to installing the screw 2 and the anti-rotation structure as a whole.

[0031] In some embodiments, the anti-rotation structure 3 is a columnar structure with multiple faces. The anti-rotation structure 3 and the base 5 are separate structures, both of which are made of copper alloy, such as H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy. The anti-rotation structure 3 is provided with threaded holes at both ends for threaded connection with the screw 2 and the base 5. It should be noted that other forms of connection are also possible without threaded connection. Among them, the end face of the screw 2 away from the anti-rotation structure 3 is provided with a second groove 1, which is conducive to installing the screw 2 and the anti-rotation structure as a whole.

[0032] In some embodiments, the anti-rotation structure 3 is a columnar structure with multiple faces. The anti-rotation structure 3 and the base 5 are separate structures, both of which are made of copper alloy, such as H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy. The anti-rotation structure 3 is provided with threaded holes at both ends for threaded connection with the screw 2 and the base 5. It should be noted that other forms of connection are also possible without threaded connection. Among them, the end face of the screw 2 away from the anti-rotation structure 3 is provided with a second groove 1, which is conducive to installing the screw 2 and the anti-rotation structure as a whole.

[0033] In some embodiments, the screw rod 2 is divided into two parts and connected by a stop structure 3, one part is installed at one end of the stop structure 3, and the other part is installed at the other end of the stop structure and connected to the base 5.

[0034] In some embodiments, a gap is provided between the anti-rotation structure 3 and the base 5, and a first groove 4 is also provided on the anti-rotation structure. In the rotational molding process, the first groove 4 is fully or partially embedded in the plastic, which is conducive to improving the overall torsion resistance of the bolt. The first groove 4 can be set as a groove of various shapes on each surface of the anti-rotation structure 3, or can be set as follows: Figure 1 A groove is provided on the end surface close to the base 5, and the number of the grooves can be set as needed, such as 2 / 3 / 4 / 5 / 6.

[0035] In some embodiments, the material of the screw 2 is SUS304 stainless steel or a material with equivalent performance, wherein the material with equivalent performance is mainly a material that is similar or better in terms of corrosion resistance, bending (flexural) strength, tensile (tensile) strength, compressive strength, and impact strength.

[0036] like Figure 2 As shown, an embedded nut for rotational molding process, the nut 7 is set as a polygonal structure, which can be installed on the embedded bolt of the present application.

[0037] In some embodiments, the cross-section of the embedded nut is a quadrilateral structure, and the connecting angles of adjacent faces are rounded, which can increase the bonding strength with the rotationally molded plastic colloid, thereby improving the torsion resistance of the embedded nut;

[0038] In some embodiments, one end surface of the embedded nut is further provided with an anti-slip disk 71;

[0039] In some embodiments, the embedded nut is made of copper alloy or a material with equivalent performance, preferably H59-1 copper alloy, wherein the material with equivalent performance is mainly a material that is similar or better in thermal conductivity and bending (flexural) strength, tensile (tensile) strength, compressive strength, impact strength, etc., and can achieve the installation effect of H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy. The specific material to be selected should be determined according to design requirements.

[0040] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of the above-mentioned technical contents without departing from the scope of the technical solution of the present utility model. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the present application.

Claims

1. An embedded bolt for rotational molding process, comprising a screw rod (2), characterized in that: A base (5) is mounted on one end of the screw rod (2), and the base (5) is made of copper alloy or a material with equivalent performance. The cross section of the base is a polygonal structure; The screw rod (2) is also provided with a rotation-stopping structure (3).

2. The embedded bolt for rotational molding process according to claim 1, characterized in that: A plurality of through grooves (51) are provided on the outer periphery of the base (5), and the base is made of H59 copper alloy, H59-1 copper alloy or H59-2 copper alloy.

3. The embedded bolt for rotational molding process according to claim 1 or 2, characterized in that: The base (5) is a hexagonal structure.

4. The embedded bolt for rotational molding process according to claim 1, characterized in that: The anti-rotation structure (3) is a columnar structure having multiple faces, and the anti-rotation structure (3) and the base (5) are an integral structure.

5. The embedded bolt for rotational molding process according to claim 1, characterized in that: The screw rod (2) is divided into two parts, which are connected by a rotation-stopping structure (3).

6. The embedded bolt for rotational molding process according to claim 1 or 2, characterized in that: A gap is provided between the anti-rotation structure (3) and the base (5), and a first groove (4) is also provided on the anti-rotation structure.

7. The embedded bolt for rotational molding process according to claim 1 or 2, characterized in that: The screw (2) is made of SUS304 stainless steel or a material with equivalent performance.

8. The embedded bolt for rotational molding process according to claim 1 or 2, characterized in that: A second groove (1) is formed on the end surface of the screw rod (2) away from the anti-rotation structure (3).

9. An embedded nut for rotational molding process, characterized in that: The nut is configured as a polygonal structure and can be mounted on the embedded bolt according to any one of claims 1 to 8.

10. The embedded nut for rotational molding process according to claim 9, characterized in that: The cross section of the embedded nut is a quadrilateral structure, and the connecting angles of adjacent faces are rounded; One end surface of the embedded nut is also provided with an anti-slip disk; The embedded nut is made of copper alloy or a material with equivalent performance.

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