What kind of shot blasting equipment is suitable for cast valves

What kind of shot blasting equipment is suitable for cast valves

1. If it is precision casting, the general weight is relatively small, the crawler type shot blasting machine  the hook type shot blasting machine can be used, if the quantity is large, the swing bed type shot blasting machine can also be selected

2. If it is sand casting, it is generally relatively large. Generally, a hook type shot blasting machine is selected. If it is very large, the weight of a single piece is more than 1 ton, etc., you can choose a trolley type  a rotary type shot blasting machine. Pill cleaning machine

3. Sometimes, if the shape  requirements are special, it is necessary to customize the shot blasting machine for special production. Our company's current casting valves, precision casting  sand casting, are all hook type shot blasting cleaning, more Some, you can see the attached pictures for details.

The casting of the valve body is an important part of the valve manufacturing process in the processing technology of the valve. The quality of the valve casting determines the quality of the valve. The following introduces several casting process methods commonly used in the valve industry:

Sand casting:

Sand casting commonly used in the valve industry can also be divided into: wet sand, dry sand, water glass sand  furan resin self-hardening sand according to different binders.

(1) Green sand is a molding process method with bentonite as a binder.

Its characteristics are: the finished sand mold does  need to be dried  hardened, the sand mold has a certain wet strength,  the sand core  shell have good concessions, which is convenient for cleaning  falling sand of castings. The molding production efficiency is high, the production cycle is short, the material cost is low,  it is convenient to organize the production line.

Its shortcomings are: castings are prone to defects such as pores, sand inclusions,  sticky sand,  the quality of castings, especially the internal quality, is  ideal.

(2) Dry molding sand is a molding process with clay as a binder,  a little bentonite can improve its wet strength.

Its characteristics are: the sand mold needs to be dried, it has good air permeability, it is  easy to produce defects such as sand washing, sand sticking,  pores,  the inherent quality of the casting is better.

Its disadvantages are: sand drying equipment is required,  the production cycle is long.

(3) Water glass sand is a molding process method with water glass as a binder. Its characteristics are: water glass has the function of automatic hardening after encountering CO2,  can have various advantages of gas hardening method modeling  core making, but There are disadvantages of poor shell collapsibility, difficulty in sand cleaning of castings,  low recycling rate of used sand.