A hot melt self-piercing rivet

Abstract

The utility model discloses a hot melt self -drilling screw, including the nail rod, the nail head of connecting in the one end of nail rod, the head of connecting in the other end of nail rod and the thread of being located on the nail rod, the one end of head away from the nail rod gradually reduces into the tip, and the outside profile of one round of the periphery of head is set up as the polygon, the outside profile of one round of the periphery of nail rod is set up as the polygon corresponding with head, the outside profile of thread is set up as the polygon corresponding with head. The cross section of head is set up as the polygon, and this structure can heat under the high -speed rotation and connect with the board quickly, make the board melt quickly, and quickly drill into the board, and the thread is set up as the polygon, and the very close connection between the thread and the board can be formed, and the bolt loosening caused by the vibration can be effectively resisted.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screw technology, specifically to a hot-melt self-tapping screw. Background Technology

[0002] Hot melt self-tapping screw: A type of threaded self-tapping screw that, with a certain force and speed, can melt and penetrate two or more layers of board material and form threads by self-tapping under special installation equipment. As the self-tapping screw body is screwed in, an effective connection between the boards can be formed.

[0003] In the existing technology, the head of the thermoplastic self-tapping screw is usually round, which has a low efficiency in generating heat during rotation, resulting in a relatively slow melting of the board material; in addition, the existing threads are generally normal round threads, which have the disadvantage that the connection formed after the self-tapping screw is drilled into the board material is not strong enough and is prone to loosening after vibration. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a thermoplastic self-tapping screw.

[0005] To achieve the above-mentioned technical effects, the present invention adopts the following solution: A thermoplastic self-tapping screw includes a shank, a head connected to one end of the shank, a head connected to the other end of the shank, and threads on the shank. The head gradually tapers to a pointed end away from the nail rod, and the outer contour of the head around its circumference is polygonal. The outer contour of the nail bar around its circumference is a polygonal shape corresponding to the head. The outer contour of the thread is a polygonal shape corresponding to the head.

[0006] In a preferred embodiment, the polygonal outline of the head, push rod, and thread is one of a triangle, a quadrilateral, a pentagon, or a hexagon.

[0007] In a preferred embodiment, the head includes a straight portion connected to the nail rod and a pointed portion connected to the other end of the straight portion. The outer contour dimension of the straight portion remains unchanged, while the outer contour dimension of the pointed portion gradually decreases. The outer contour of the portion of the nail rod near the head gradually decreases until it matches the straight portion.

[0008] In a preferred embodiment, the polygon is an equilateral polygon.

[0009] In a preferred embodiment, the end of the nail head that connects to the nail rod is recessed with a groove, and the nail rod extends into the groove to connect with the nail head.

[0010] Compared with existing technologies, the beneficial effects are: 1. The cross-section of the head is set as a polygon. This structure can quickly heat up when connected to the plate under high-speed rotation, causing the plate to melt quickly and quickly penetrate the plate. 2. The thread is set as a polygon, which makes the thread and the plate form a very tight connection, which can effectively resist bolt loosening caused by vibration. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 Another perspective structural diagram.

[0013] Figure 3 This is a bottom view of the structure of this utility model.

[0014] Reference numerals: 10, nail head; 101, groove; 20, nail shank; 30, thread; 40, head; 401, straight part; 402, pointed part. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] A thermoplastic self-tapping screw includes a shank 20, a head 10 connected to one end of the shank 20, a head 40 connected to the other end of the shank 20, and a thread 30 on the shank 20; the head 10, shank 20, thread 30, and head 40 are usually integrally formed, which is the prior art.

[0017] The head 40 gradually tapers to a pointed end away from the shank 20, and the outer contour of the head 40 around its circumference is polygonal; the outer contour of the shank 20 around its circumference is polygonal corresponding to the head 40; the outer contour of the thread 30 is polygonal corresponding to the head 40.

[0018] The polygonal design creates multiple edges on the surface of the head 40. During self-tapping, these edges scrape against the board, increasing friction between the head 40 and the board. High-speed rotation and connection with the board generate rapid heat, melting the board quickly and allowing for rapid penetration, thus improving self-tapping efficiency. Similarly, the polygonal design of the shank 20 also creates multiple edges on its surface. Even after the shank 20 penetrates the board, it continues to scrape against the board, ensuring efficient penetration of the self-tapping screw throughout the process. Furthermore, the polygonal design of the thread 30 creates a very tight connection between the thread 30 and the board, effectively resisting bolt loosening caused by vibration.

[0019] In a preferred embodiment, the polygonal outline of the head 40, the push rod, and the thread 30 is one of a triangle, a quadrilateral, a pentagon, or a hexagon.

[0020] In a preferred embodiment, the head 40 includes a straight portion 401 connected to the nail rod 20 and a pointed portion 402 connected to the other end of the straight portion 401. The outer contour dimension of the straight portion 401 remains unchanged, while the outer contour dimension of the pointed portion 402 gradually decreases. The outer contour of the portion of the nail rod 20 near the head 40 gradually decreases until it matches the straight portion 401.

[0021] In the prior art, the outer contour dimension of the nail rod 20 gradually decreases to the tip, while in this utility model, a straight part 401 with an unchanged outer contour is provided. Thus, when the self-tapping screw is running at high speed, compared with a direct inclined surface to the bottom, it can generate potential energy during operation and have an impact force, which is more conducive to the self-tapping screw penetrating the board.

[0022] In a preferred embodiment, the polygon is an equilateral polygon.

[0023] In a preferred embodiment, the end of the nail head 10 connected to the nail rod 20 is recessed with a groove 101, and the nail rod 20 extends into the groove 101 to connect with the nail head 10.

[0024] The groove 101 can accommodate the material that flows out after the sheet melts and is squeezed by the self-tapping screw.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A thermoplastic self-tapping screw, characterized in that, It includes a nail rod (20), a nail head (10) connected to one end of the nail rod (20), a head (40) connected to the other end of the nail rod (20), and a thread (30) provided on the nail rod (20). The head (40) gradually narrows into a pointed end away from the nail bar (20), and the outer contour of the head (40) around its circumference is polygonal. The outer contour of the nail rod (20) around its circumference is set as a polygon corresponding to the head (40); The outer contour of the thread (30) is a polygonal shape corresponding to the head (40).

2. The thermoplastic self-tapping screw as described in claim 1, characterized in that, The polygonal outline of the head (40), the push rod, and the thread (30) is one of a triangle, a quadrilateral, a pentagon, or a hexagon.

3. The thermoplastic self-tapping screw as described in claim 1, characterized in that, The head (40) includes a straight portion (401) connected to the nail bar (20) and a pointed portion (402) connected to the other end of the straight portion (401). The outer contour dimension of the straight portion (401) remains unchanged, while the outer contour dimension of the pointed portion (402) gradually decreases. The outer contour of the part of the nail bar (20) near the head (40) gradually decreases to match that of the straight portion (401).

4. The thermoplastic self-tapping screw as described in claim 1, characterized in that, The polygon is an equilateral polygon.

5. The thermoplastic self-tapping screw as described in claim 1, characterized in that, The nail head (10) is connected to the nail rod (20) at one end with a recessed groove (101), and the nail rod (20) extends into the groove (101) and connects to the nail head (10).

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