Full-mold casting technique of resin-bonded sand

Abstract

The invention provides a process for resin sand full mold casting. The process comprises the following steps: manufacturing a model by a foam materiel; coating paint on the surface of the model, and drying the model; modeling, namely, putting the dried model into a sand box, laying a pouring channel, filling resin sand into the sand box to model, and providing a shrink head on the model; and pouring, sand shaking and cleaning, namely, pouring molten iron into the sand box, opening the box to shake sand after the molten iron is cooled, and cleaning the cast, wherein during pouring, the sand box keeps a vacuum state. According to the process for the resin sand full mold casting, because the sand box keeps the vacuum state during pouring, large amount of waste gas and smoke generated by the foam model can be taken away by a vacuum system and subjected to uniform treatment, so that the waste gas and the smoke are not discharged into a workshop and can not cause pollution; and because the waste gas is taken away by the vacuum system in time, the molten iron can be filled smoothly, so as to avoid casting defects that filling is not full, air holes are generated, and the like.

Description

technical field [0001] The invention relates to a full mold casting process, more specifically, to a resin sand full mold casting process. Background technique [0002] Solid mold casting is also known as vaporized mold casting or lost foam casting, which refers to the use of polystyrene foamed patterns instead of wooden or metal molds, and molding with dry sand or resin sand, water glass sand and other molding sand, without the need for mold removal It is a method of directly pouring high-temperature liquid metal onto the vaporizable pattern in the mold, causing the pattern to burn, gasify, and disappear to form a casting. The full mold casting process usually includes the steps of manufacturing the gasification pattern, bonding the pattern with the gating system and the riser, coating and drying the pattern, sand filling molding, pouring, sand shakeout and cleaning. For small and medium-sized castings produced in large quantities, such as automobile and tractor parts, cas...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the shortcomings of the existing resin sand solid mold casting process, which is easy to cause pollution, and the cast castings are prone to casting defects such as underfill and pores, and provides a method that will not cause pollution, and the castings will not appear underfill, pores, etc. Resin Sand Solid Mold Casting Process for Casting Defects

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