TW201314063A - Screw surface plating structure - Google Patents

Abstract

The present invention relates to a screw surface plating structure, at least including a first surface layer which is an electroplating layer mainly consisting of nickel and covers an outer surface of a screw main body; and a second surface layer which is an electroplating layer coated with zinc oxide, zincates, or other metal coatings and covers an outer surface of the first surface layer. Through the first surface layer, which consists of nickel, facilitating other electroplating layers to be coated and fixed thereon, the electroplated and coated second surface layer has excellent adhesion effect, such that the second surface layer is not easy to be peeled off even by strong friction.

Description

Screw surface plating structure

The invention relates to a screw surface plating structure, in particular to a surface plating structure which is resistant to abrasion and is not easily peeled off.

According to the general, the existing screws are mainly used to screw and fix two or more kinds of articles, and the metal screws are widely used by all walks of life because of their better material rigidity; in some occasions, the metal The screw is required to have the function of anti-rust, and in order to achieve the anti-rust function, the manufacturer will perform acid-resistant plating on the surface of the screw.

As shown in FIG. 1, the conventional metal screw 1 includes a screw head 11 and a rod body 12 disposed on the screw head 11, and a spiral thread 13 is arranged on the peripheral surface of the rod body 12, and the rod is A cutting edge portion 14 is formed at the end of the body 12. After the screw is made in the factory, it is further electroplated to cover a surface of the anti-rust layer 2, and the composition of the anti-rust layer 2 is mainly zinc oxide or zincate; The anti-rust layer 2 formed by zinc oxide or zincate or other metal coating is sufficient to make the screw 1 have an acid-proof effect, so that the screw 1 can achieve the purpose of anti-rust.

However, although the screw 1 has the function of anti-rust on the surface of the anti-rust layer 2 by electroplating and adding a tool, the screw 1 which is actually removed by using the screw lock and retracting is often lost in anti-rust function; The reason is that the rustproof layer 2 and the main body of the screw 1 have insufficient bonding force, and the rustproof layer 2 is mainly composed of zinc oxide or zincate, and zinc oxide or zinc acid is used. The combination of the nature of the salt and the metal is not strong. Therefore, after the screw 1 is rubbed and the object is rubbed, the rustproof layer 2 is often peeled off. If the screw 1 is used again At the time, there is no anti-rust function, even if it is necessary to re-screw again due to the loss during the screwing process, the screw 1 used for screwing can only be disposed of and can no longer be used, but a new screw is needed. For this reason, this obviously causes a great waste.

In view of the above-mentioned shortcomings of the conventional screw, it is a problem that the screwdriver manufacturer needs to overcome at present, how to improve the anti-rust ability when the screw is reused.

The invention mainly overcomes the phenomenon that the anti-rust effect of the screw is poor, and in particular, in the case of being used again after being screwed, it is easy to cause a lack of serious anti-rust effect due to peeling of the anti-rust layer.

To this end, the present invention provides a screw surface plating structure, wherein the present invention at least includes a first surface layer and a second surface layer, the first surface layer is a nickel alloy-based plating layer, and the second surface The layer is a plating layer formed of zinc oxide or zincate or other metal coating; the first surface layer is plated on the outer surface of the screw body, and the second surface layer is in the Electroplating is applied to the outer surface of the first surface layer.

Since the first surface layer is made of nickel as its main element, the nickel has good ductility and good adhesion, which is beneficial to other metals to be electroplated; the second surface layer is The electroplated layer formed by zinc oxide or zincate or other metal coating has the best anti-corrosion ability. After being coated on the surface of the first surface layer by electroplating, it can be combined with A surface layer has an excellent fixing force, so that the second surface layer is not easily peeled off even if it is strongly rubbed, so that the screw can be retained by the screw and can be retained for rust prevention when it is used again.

In order to make it easier for your examiner to understand the effects of the construction of the present invention, the following diagram is followed:

First, as shown in FIG. 2, the screw 3 of the present invention includes at least one screw head 31, and a rod body 32 disposed on the screw head 31. The peripheral surface of the rod body 32 is provided with a spiral thread. 33, and a cutting edge portion 34 is formed at the end of the rod body 32, wherein the outer surface of the screw 3 has a first surface layer 4 and a second surface layer 5, wherein the first surface layer 4 is attached to the body of the screw 3 Contacting and covering the outer surface of the screw 3, the second surface layer 5 is coated on the outer surface of the first surface layer 4; the first surface layer 4 is a plating layer mainly composed of a nickel alloy, and the second surface layer The 5 series is an electroplated layer formed by coating a zinc oxide or a zincate or other metal.

The main element used in the first surface layer 4 is nickel. Since the standard potential of nickel is -0.25 V, the iron-based alloy is a cathode plating layer, and the nickel ductility is excellent, and the thickness of the plating layer is not more than 2μm is preferred; the first surface layer 4 made of nickel can be excellently fixed with the screw 3 body, and has excellent adhesion, which is beneficial for other plating layers to be coated thereon. The second surface layer 5 is a plating layer formed of zinc oxide or zincate or other metal coating, and is plated on the surface of the first surface layer 4 as described above. The surface layer 4 has excellent adhesion, so that the second surface layer 5 coated by electroplating can form an excellent fixing effect with the first surface layer 4, so that the second surface layer 5 is strongly rubbed even if it is strongly rubbed. It is also not easy to cause spalling. In this way, the screw 3 having the first surface layer 4 and the second surface layer 5 which is electroplated can have an excellent rust preventing capability, so that the screw 3 can be protected even when it is used again after being screwed. Rust effect.

The effect of the present invention is that the outer surface of the screw 3 has a first surface layer 4 and a second surface layer 5, wherein the first surface layer 4 is in contact with the body of the screw 3 and covers the outer surface of the screw 3. The second surface layer 5 is further coated on the outer surface of the first surface layer 4, the first surface layer 4 is a nickel-based plating layer, and the second surface layer 5 is made of zinc oxide or zinc acid. a plating layer formed by a salt or other metal coating; the first surface layer 4 formed of nickel facilitates the bonding of the other plating layers to the upper surface, thereby coating the second surface of the plating The layer 5 has an excellent fixing effect, so that the second surface layer 5 is less likely to be peeled off even if it is strongly rubbed, and the rust preventing effect can be maintained even when it is used again after being screwed. Thus, the crucible 3 having the first surface layer 4 and the second surface layer 5 which are electroplated can have an excellent rust preventing ability.

In summary, the surface coating structure of the screw of the invention can effectively solve the shortcomings of the conventional screw rust, and therefore has high industrial practical value, and has the requirements of novelty and progress, and cannot be achieved for known products, To file an application for an invention patent, you are requested to grant a patent right to your review board.

1. . . Screw

11. . . Screw head

12. . . Rod body

13. . . Screw

14. . . Drill blade

2. . . Rustproof layer

3. . . Screw

31. . . Screw head

32. . . Rod body

33. . . Screw

34. . . Drill blade

4. . . First surface layer

5. . . Second surface layer

Figure 1 is a schematic cross-sectional view of a conventional screw.

Figure 2 is a schematic cross-sectional view of the screw of the present invention.

3. . . Screw

31. . . Screw head

32. . . Rod body

33. . . Screw

34. . . Drill blade

4. . . First surface layer

5. . . Second surface layer

Claims (2)

A screw surface plating structure comprising at least; a first surface layer, a nickel-based plating layer, coated on the outer surface of the screw; a second surface layer, with zinc oxide or zincate or other The electroplated layer formed by the metal coating is coated on the outer surface of the first surface layer; the first surface layer formed by nickel facilitates the bonding of the other electroplated layers to the upper surface, thereby enabling electroplating The second surface layer of the coating has an excellent fixing effect, so that the second surface layer is not easily peeled off even if it is strongly rubbed. The screw surface plating structure according to claim 1, wherein the first surface layer has a thickness of not more than 2 μm.