Casting process method combining steel-shot chilling and vibratory pouring based on disappearing die

Abstract

The invention discloses a casting process method combining steel-shot chilling and vibratory pouring based on a disappearing die. The casting process method combining steel-shot chilling and vibratory pouring based on the disappearing die is characterized in that a manufactured foam model is placed into a chilling sand box, steel shots are also placed at the position of a clearance between the foam model and the chilling sand box, then the chilling sand box is placed into a sand box with a vacuum-pumping negative-pressure model, dry sand is filled between the chilling sand box and the sand box with the vacuum-pumping negative-pressure model, a plastic film is laid, a sprue cup is placed, and finally, the operation of pouring is carried out under the condition that the operations of vacuumpumping and vibrating are simultaneously carried out. According to the casting process method combining steel-shot chilling and vibratory pouring based on the disappearing die, the circular use of the steel shots and the sand is realized, the problem of lower cooling speed of a cast in the casting of the disappearing die is thoroughly solved, the problems of bulky crystal grains, uncompacted tissues and the like, which are easy to occur in the casting of a traditional disappearing die, are avoided, the toughness and the compactness of the tissues of the cast are enhanced, the use quantity of alloy elements, such as Cr, Mo and the like, is lowered, the service life of a wear-resisting cast is ensured, the batch production of a product is realized, the rejection rate is reduced, and the manpower cost is lowered.

Description

technical field [0001] The invention belongs to the field of casting process methods for wear-resistant products, in particular to a casting process method based on the combination of steel shot chilling and vibration pouring based on lost foam. Background technique [0002] Lost foam casting is to bury the white mold made of EPS or STMMA copolymer in the molding sand, and then pour the molten metal from the sprue cup after vacuuming and compacting. The shape of the lost foam meets the vaporization of the molten metal to form a cavity, and the molten metal fills the cavity and solidifies to form a casting. [0003] The lost foam casting process adopts vacuum negative pressure technology, which is easy to shape and has good mold rigidity. However, the lost foam casting process also has its inherent weaknesses, that is, the castings are prone to defects such as carburization, slow cooling speed, and incompact structure. [0004] The wear-resistant castings used on a large sca...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to avoid the shortcomings of lost foam casting, and to provide a method that can effectively utilize the advantages of using recyclable dry sand in the shape of lost foam casting, and can solve the problem of coarse grains caused by slow cooling in lost foam casting. The vibratory casting process based on the combination of steel shot chilling and negative pressure dry sand based on lost foam and non-compact structure

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