5 common casting technology
Metal casting technology products manufactured by the method of pouring liquid material flows into the mold as to create products in the mold that shapes the metal material. 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 metal casting
Casting method can manufacture products from different materials: ferrous metals (iron, steel, metals .. eyebrows: aluminum, copper, cast non-metallic materials: molded from plaster statues, xi bring)
Casting from a few grams can be up to several tons, such as the hammer body, the machine bed ..
Shaped castings, complex structures such as fuselage engine, nacelle, .. but other methods difficult to work or can not be made
There may be multiple layers of metal casting in a different castings
Castings manufacturing cost cheaper because less investment, flexible manufacturing properties, relatively high productivity. Capable of mechanization and automation.
Casting is also used in the production of artistic products, decorative: Cladding foot pole, church bells, cast monuments.
The accuracy of the size and shape of the ball no higher map
Metal-consuming system for filling, hot tops, beans slightly
Consuming metal castings by thickness greater than forged or welded.
Easy to cause defects such as deficient, porosity, sucking XY disaster area, burning sand
Hard working conditions. When cast in sand molds often have low productivity.
Fresh sand casting technology
Fresh sand molds used for molding congnghe first in the sand. Materials for water clay molding sand. Fresh sand molds with user-friendly features, will shadow casting surface if fine sand particles. However molding process to form to get alarmed should form molded products will have a large degree of processing residuals.
Dry sand molding
In dry, mold technology if fresh mold is brought about 5pm drying in an oven before pouring is also known as a dry mold. Here would like to introduce to you the technology of water glass sand mold hardened by carbonic gas. Glass of water, also known as sodium silicate solution is mixed into the sand before grinding mold. Once finished, the mold was pounding 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 nationwide casting company. Only downside is the sand regeneration issues to note.
Fire foundry molds
This is based on new technology than the traditional method. To cast a product, we need to manufacture products with 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 fire and hot metal will fill 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 new technology for sand processing plant was one layer of plastic wrap. When producers bring sand mixed with formaldehyde acid, will be cold curing resin sand mold, or the mold sand will be brought heated mold curing resin sand hot.
This is the technological line that Japanese companies will be favored because of sand mixed with furan resin and acid, very good solid mold closes, products with a glossy surface but difficult problem is pollution Furan work for very toxic plastic smell.