About Dongguan casting classification knowledge

There are many casting types in Dongguan, according to the modeling design method Habitually divided into:

1. General sand casting, covering types including green sand, dry sand and organic chemical hardened sand.

2. Special casting, according to the shape design raw materials can be divided into special casting with pure natural mineral resources sand and stone as the key shape design raw material (such as investment casting, clay casting, shell casting in the foundry production workshop, load pressure casting, real casting) , Porcelain mold casting, etc.) and special casting with metal as the key mold raw material (such as metal mold casting, pressure casting, continuous casting, etc.).

Dongguan foundry processing technology generally includes:

1. The mold (a vessel that turns liquid metal into solid castings) is prepared in advance. The molds can be divided into sand molds, metal molds, porcelain molds, clay molds, high-purity graphite molds, etc. according to common raw materials, and they can be divided into disposable types according to the frequency of application. , Semi-permanent and permanent molds, the quality of the molds prepared in advance is the key element that harms the quality of the castings;

2. The melting and pouring of cast metal, the key to cast metal (casting alloy) is cast iron, cast steel and cast non-ferrous plate alloy

3. Casting solution and inspection. Casting solution includes eliminating core and casting surface dirt, removing gates, shoveling burrs and drape seams and other protrusions and shaping them, preventing rusting treatment and preliminary processing. The casting process can be divided into three fundamentals, namely, the casting metal is prepared in advance, Mold preparation in advanceAnd casting preparation. Casting metal raw materials refer to metal polymer materials used for casting castings in casting production and processing. It is an alloy composed of a metal chemical molecule as the main component and other metal raw materials or non-metallic elements. It is generally called casting alloy, and it mainly includes cast iron, stainless steel castings and cast non-ferrous plate alloys.