5 common casting technology

Today the metal casting is used to produce thousands of different details widely applied in all areas of ngiep as manufacturing, fabrication means of transportation, petroleum, marine, cement ...

Advantages and disadvantages of cast metal

Advantage:

- The method can produce castings products from different materials: ferrous metals (iron, steel, metals .. eyebrows: aluminum, copper, cast non-metallic materials: cast from plaster statues, cement)

- Casting may from few grams to several tonnes as the hammer body, the machine bed ..

- Casting shapes, complex structures like chassis engine, nacelle, .. but other methods of processing difficult or impossible to fabricate by

- There may be multiple layers of metal casting different in a casting

- The cost of cheap manufactured castings for less investment, flexible manufacturing nature, relatively high productivity. Capable of mechanization and automation.

- Casting is also used in the manufacture of products to be artistic, decorative: foot pole tangent, church bell, cast monuments.

Defect:

 - Accuracy of form shadow map size and low

 - Cost of metal for pouring system, hot tops, steam beans

 - Cost of metal castings by thickness greater than forged or welded.

 - Easy to cause defects such as deficient, porosity, sucking XY disaster area, fire sand

 - Conditions for heavy work. When cast in sand molds often have low productivity.

Fresh sand molding

Fresh sand mold first used in molding sand. Materials for water clay molding sand. Fresh sand mold features easy to use, will shadow casting surface if fine sand particles. However molding process to form to get struck should form molded products will have greater degree of processing residuals.

Dry sand molding

In dry mold technology if fresh mold drying in an oven brought about 5pm before pouring is also called a dry mold. Here introduce the technology you water glass sand mold solidified by carbonic gas. Water glass, also known as sodium silicate solution is mixed into the sand before grinding mold. After the mold was finished, retired carbonic gas spray to mold to harden. It is due to a chemical reaction between sodium silicate and carbonic gas and water (alkaline and acid reacting) technology water glass sand mold easy to make, easy to use products with less processing residuals, solid mold has been widely applied in most national casting company. Only downside is the sand regeneration issues to note.

Technology foundry molds fire

This is based on new technology than the traditional method. To cast a product, we need to manufacture such products by polyesteron, then poured into the mold and dry sand in combination with the vacuum, the mold will be rigid. When pouring the metal into molds Polyesteron will fire and liquid metal fills the mold. In addition to the core technology of drying and sintering is made on automatic machines for high productivity and efficiency.

Plastic molding sand

This is a new technology with sand was covered treatment plant 1 resin. When producers bring sand mixed with formaldehyde acid, will be cooled curing resin sand mold, or the mold sand will be brought heated mold curing resin sand hot.

Furan foundry

This is the technological line that the Japanese companies would be favored because of sand mixed with resin Furan and acid curing mold will very good, the product has a glossy surface, but the problem is pollution work for very toxic furan resin odor.