KR20140013555A

KR20140013555A - A nozzle for shooting

Info

Publication number: KR20140013555A
Application number: KR1020120081066A
Authority: KR
Inventors: 강종운
Original assignee: (주)재원산업
Priority date: 2012-07-25
Filing date: 2012-07-25
Publication date: 2014-02-05

Abstract

The present invention relates to a shooting nozzle for sand blast, which is mainly made of cold work tool steels. The shooting nozzle comprises a nozzle main body (2) having a shooting passage (3) inside thereof and a ring accommodating groove within a cross-section having the smallest shooting passage along the shooting passage (3); a wear-resistant ring (1) mainly made of cemented carbide alloy, and installed in the ring accommodating groove of the nozzle main body (2) so that an inner peripheral surface of the wear-resistant ring forms a smooth shooting passage (3) together with the nozzle main body (2), wherein polishing materials are continuously sprayed through the nozzle main body (2) and the wear-resistant ring (1). The shooting nozzle has an around 100 times improved lifespan due to good durability and can be manufactured at low costs since a percentage of the cemented carbide alloy is minimized compared to existing ceramic-based nozzles. In addition, the cemented carbide alloy ring and the nozzle main body can be easily and separately replaced with new ones according to conditions thereof, whereby an expense for nozzle replacement can be reduced.

Description

Shortening nozzle {a nozzle for shooting}

The present invention relates to a shorting nozzle, and more particularly, to install a cemented carbide ring at the smallest ejection end surface of a spray nozzle made of a cold-hole oral cavity so that the abrasive is continuously injected through the cold-hole oral cavity and the cemented carbide ring. It relates to a shorting injection nozzle of one structure.

In general, if there is dirt or rust on the metal surface, after coating, the coating film is peeled off or the performance is poor. Even if the paint is applied smoothly, the effect is not expected very much, so the finish of the paint is good and the bad can be seen that the first treatment is good or bad.

The front surface treatment of steel is divided into mechanical treatment such as shot blast and chemical treatment of degreasing or phosphate chemical treatment. The shot blast compresses sand to clean the surface of metal products. It refers to a method of blowing with air, whereby the casting sand, rust, etc. adhered to the surface of the article is removed and the fine uneven surface is finished.

There are two methods for spraying sand, one using compressed air and the other using centrifugal force. The method of using compressed air is spray mist using an integrated paint container and an air gun that manually sprays paint according to the principle of operation. It is divided into a suction type such as a blowing type and a direct pressure type in which the compressed air is connected to the abrasive tank to spray the abrasive and air simultaneously while maintaining a high pressure.

The injection nozzle used for the shot blasting has a single type and a single cylindrical shape formed in one body and a double type in which a ceramic material or a cemented carbide inner tube are inserted. Although it is excellent, there is a problem that it needs to be replaced frequently because it cannot endure more than 15 hours due to the friction generated when sand passes.The cemented carbide is more expensive than ceramic, and when used as an inner pipe, it is hardly bonded to the exterior. There was a problem.

The present invention devised to solve the above problems, the shorting of the structure excellent in durability compared to the ceramic while lowering the cost by configuring a structure that can maintain the durability while minimizing the specific gravity of the cemented carbide material of the material constituting the entire nozzle It is an object to provide a nozzle.

It aims to provide a shorting nozzle with a structure that is more durable than ceramics while lowering the cost by constructing a structure that can maintain durability while minimizing the specific gravity of cemented carbide material among the materials of the whole nozzle.

The present invention by the above configuration has an effect that the durability is excellent compared to the conventional ceramic nozzle, the life is improved by about 100 times.

In addition, there is another effect that can be manufactured at a low cost by minimizing the proportion of the cemented carbide material occupying in the nozzle structure.

In addition, it is easy to replace separately according to the state of the wear-resistant ring and the nozzle body, there is another effect that can reduce the cost burden of the nozzle replacement.

1-a front sectional view showing an embodiment of a short nozzle according to the present invention.
2-a plan view of FIG.
3-perspective view of FIG. 1.

The present invention for achieving the above object, the cold air oral cavity as an address material, provided with an injection path ③ narrowed toward one side in the inner side, the nozzle is formed with a ring receiving groove inside the smallest injection cross-section portion of the injection path Main body ②; The cemented carbide is composed of a wear-resistant ring ① formed in the receiving groove of the nozzle body ② and having an inner circumferential surface to form a smooth spray path ③ together with the nozzle body ②. The shorting injection nozzle sprayed through ① continuously is the technical gist.

Here, it is preferable that the wear-resistant ring ① is installed at the injection end of the nozzle body ② to form a funnel-type injection path ③.

Therefore, it is excellent in durability compared with the conventional ceramic nozzle and there is an advantage that the service life is improved by about 100 times.

In addition, there is another advantage that can be manufactured at a low cost by minimizing the proportion of the cemented carbide material occupying in the nozzle structure.

In addition, it is easy to replace separately according to the state of the wear-resistant ring and the nozzle body, there is another advantage that can reduce the cost burden of the nozzle replacement.

The present invention having the configuration as described above will be described in detail with reference to the following drawings. 1 is a front sectional view showing an embodiment of a shorting nozzle according to the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is a perspective view of FIG.

Shorting nozzle according to the present invention is composed of a nozzle body (2) having an injection path (3) inside and a wear ring (1) fitted inside the nozzle body (2) has a complex structure of a conventional single and double nozzle structure.

The nozzle body ② is composed of a cold oral cavity, the cold oral cavity is a mold tool steel mainly used in the vicinity of room temperature SKD-11 (KS STD-11) of C-1.5, Cr-12, Mo-1.0, V-0.4 alloy Is most commonly used because of its wear resistance and impact resistance.

The SKD-11 is easily cured by air-cooling, so that the hardenability is good and the heat treatment deformation is small, so it is suitable for precision molds, and is mainly heat-treated according to the purpose of use. In general, low temperature (180 ° C) tempering is sufficient in consideration of wear resistance. For punching molds that require impact resistance, such as nozzles, high temperature (500 ° C) tempering, where secondary hardening occurs, is more suitable.

An injection path ③ narrowing toward one side is formed inside the nozzle body ②, and a ring receiving groove is formed in which the wear-resistant ring ① (described below) is fitted inside the smallest ejection end portion of the injection path ③.

1, 2, and 3 in the embodiment shown in Fig. 1, the injection path ③ becomes narrower toward the upper side and the same cross section from the end of the injection path ③ formed the smallest injection cross-section to the upper end of the injection end of the nozzle body ② It has an extended funnel shape.

The ring receiving groove recessed on the injection path ③ is formed at the injection end of the nozzle body ② having the smallest ejection section, and the carbide receiving material wear-resistant ring ① is fitted into the ring receiving groove.

The cemented carbide constituting the wear-resistant ring ① is a composite structure in which a carbide layer of high hardness is joined with a metal, which is a kind of dispersion-reinforced alloy, having the highest hardness at room temperature as well as in the high temperature region, mainly comprising tungsten carbide. Cobalt sintered alloy, which is a binding metal, is used. It is very hard and wear-resistant, and is used for cutting, cutting, and cutting of metal products.

The cemented carbide is prepared by separately preparing and pressing cobalt powder and tungsten carbide powder, and then pre-sintering cobalt powder at 1000 ° C. to finish the final form, and then heating to 1400 ° C. to sinter the tungsten. And carbon are diffused into cobalt to form a tungsten carbide grain structure.The sandblasting spray nozzle material used in the actual industrial field is material scarcity and Due to the difficulty, ceramics are mostly used as a material forming the injection path ③ rather than the cemented carbide, which is expensive.

The wear-resistant ring ① is formed to have the same inner circumference as the smallest ejection section of the injection path ② and is inserted into the ring receiving groove so that the inner circumferential surface is smoothly connected to the injection path ③ to the injection end of the nozzle body ②, and thus the abrasive is It passes through the nozzle body ② and the wear-resistant ring ① continuously and is sprayed out.

The part in which the injection path ③ extends in the same cross section is a part in which wear is most severely generated in the nozzle body ② as the pressure energy of the abrasive is changed to the velocity energy due to the smallest ejection cross-section, so that the abrasive has the fastest speed. By inserting the cemented carbide wear-resistant ring ① is to supplement and improve the durability of the nozzle body ②.

The present invention according to the configuration as described above is improved in durability so that the life is extended by about 100 times compared to the single injection nozzle made of ceramics, it can be manufactured at a much lower cost than the double injection nozzle composed of cemented carbide material of the entire inner pipe Do.

In addition, since the wear-resistant ring ① is smoothly positioned on the injection path ③ of the nozzle body, it is not easily released from the nozzle body ② by injection pressure and friction from the inside, but is easily removed by pressure from the outside. The nozzle body ② and the wear-resistant ring ① may be replaced separately according to the wear state of each.

①: Wear-resistant ring
②: nozzle body
③: injection path

Claims

A nozzle body ② having a cold working mouth as an address material, having an injection path ③ narrowing toward one side inward, and having a ring receiving groove formed inside the smallest ejection end portion of the injection path ③;
Carbide alloy is used as an address material, and is provided in the ring receiving groove of the nozzle body ②, and an inner circumferential surface is formed of a wear ring ① forming a smooth injection path ③ together with the nozzle body ②; Shorting injection nozzles characterized in that the injection through the ring ① in succession.

According to claim 1, wherein the wear-resistant ring ①,
Shorting injection nozzles, characterized in that formed in the injection end of the nozzle body (2) to form a funnel-type injection path (3).