Vacuum seal modeling method for refrigerator cold closet plastic uptake mould casting

Abstract

The invention relates to a vacuum seal modeling method for a refrigerator cold closet plastic uptake mould casting, and relates to the technical field of casting. The method comprises the following steps: 1) drawing up a cold closet solid model on three-dimensional software, and then utilizing a numerically-controlled machine tool to automatically process a polyurethane model; 2) putting the polyurethane model in the middle position of a template, coating a heated and softened plastic film on the surfaces of the template and the polyurethane model, and vacuumizing in an aspirating chamber; 3) putting an aspirating sand box on the polyurethane model and the template coated with the plastic film, sticking a gating system made of evanescent mode foam material on the polyurethane model, adding dry sand to ram-jolt, vacuumizing the aspirating sand box; 4) drawing, overturning the aspirating sand box, removing a supporting plate in the model, adding resin sand in the inner chamber of the model, and manufacture resin sand core; 5) orderly putting a normal sand box on the aspirating sand box, adding clay sand in the normal sand box to compact, and forming a sprue; 6) lifting the normal sand box, enabling the normal sand box to be separated from the aspirating sand box, removing the model, performing mould assembling, and waiting to pour. Through the adoption of the structure that the model is manufactured by three-dimensional drawing numerical control machining, the freedom degree of the model is improved, the stability of the size is kept, the labor is saved, and the pollution to the environment is low.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a vacuum-tight molding method for a plastic-absorbing mold casting of a refrigerator refrigerator. Background technique [0002] The vacuum sealing molding method is also called the V method, which is a physical molding method without any adhesive, mainly adding dry sand without any adhesive in a special sand box, and sealing the sand box with a tight plastic film Finally, vacuuming depends on the pressure difference inside and outside the mold to compact and shape the sand without adhesive, and then cast to obtain castings; it is characterized by good surface quality of castings, high metal utilization rate, convenient sand falling, and dry sand recycling. High efficiency, easy organization and management, short production cycle and favorable environmental protection. [0003] Refrigerator blister mold is an important equipment for producing refrigerator liners. The domestic ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a vacuum-sealed molding method for the vacuum-sealed molding of the refrigerator freezer blister mold casting that realizes the mechanization of molding and solves the problem of manual molding size deviation

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