Gray iron castings foundry requirements, machine tool bed casting foundry manufacturers, in Bo

Mainly used for rough casting machine parts, some precision castings, it may also be used as machine parts. Casting mechanical products occupy a large proportion, such as tractors, casting weight about 50 to 70% by weight of the whole, agricultural machinery accounted for 40 to 70%, machine tools, internal combustion engines and the like 70 to 90%. All kinds of castings, casting machinery used in most varieties, the most complex shapes, is also the largest amount, about 60% of total production castings. Followed by the metallurgical ingot mold and engineering pipeline. Gray iron castings machined surface quality and appearance of non-influential casting commodity, including: (1) the casting surface unevenness degree (up boxes, collapsed and sand); (2) gray iron casting surface or cavity cleanliness (sticky sand, stick "coating layer"); (3) gray iron castings flatness deviation (non-processed surface undulating); (4) the casting surface roughness; (5) casting contour definition (bosses, Umbilical etc. contour sharpness structural unit visually assessed). Supporting Conditions gray iron castings of gray iron castings molding machine molding equipment can play its role in supporting a great relationship with the conditions, including the following aspects. 1) sand: sand Different shapes equipment performance requirements are different, such as air rushes sand liquidity requirements, and high-pressure molding is this low performance requirements. If a plant simultaneously in two or more modeling method, we must consider whether the sand can be common. 2) Core: mold hardness of 85 or more, or when casting cavity dimensions are higher, you must use cold box, hot box, shell core and other sophisticated core. Other less demanding, you can use clay sand mold core. 3) appearance: the appearance of accuracy and surface roughness rating should be higher than the casting above grade level expectations. 4) Power: factory or workshop transformer capacity adequacy sources of compressed air. 5) financial situation: the ability to pay funds and the return of post-production capability. 6) Plant: especially in the old workshop technological transformation, to fully take into account the height of the plant, the width, the workshop lifting capacity. Based on the above elements and principles for sand technology, production applications, use conditions, economic and other comprehensive technical and economic evaluation of the type of gray iron castings molding equipment to make a choice.