Precoated sand shell mold casting technology

Abstract

The invention belongs to the technical field of casting, and particularly relates to a precoated sand shell mold casting technology. A template adopted by the casting technology comprises a mold frame, wherein an elastic film is fixedly connected to the middle of the mold frame, and the thickness of the elastic film is consistent with that of the mold frame; a flat plate is arranged on one side ofthe mold frame, and the flat plate and the mold frame are fixedly connected through a set of supporting columns; a set of sliding holes are uniformly formed in the opposite positions of the flat plate and the elastic film, sliding columns are slidably connected into the sliding holes, and the ends, close to the elastic film, of the sliding columns are used for supporting the elastic film; a set of T-shaped grooves are formed in the side, away from the mold frame, of the flat plate, and sliding rails are slidably connected into the T-shaped grooves; and wedge-shaped clamping blocks are arranged at the positions, corresponding to the sliding columns, of the sliding rails. According to the precoated sand shell mold casting technology, the sliding columns are pushed, so that the sliding columns push the elastic film to deform and then are tightly attached to a workpiece to be subjected to mold taking, the sliding columns are clamped by pushing the sliding rails and the clamping blocks, then the mold taking operation can be quickly completed after the elastic film is separated from the workpiece to be subjected to mold taking, and the mold taking efficiency of the template is improved.

Description

technical field [0001] The invention belongs to the technical field of casting, in particular to a film-coated sand shell mold casting process. Background technique [0002] There are mainly two types of casting: sand casting and special casting: [0003] 1. Ordinary sand casting uses sand as the mold material, also known as sand casting and foundry, including wet sand mold, dry sand mold and chemically hardened sand mold, but not all sand can be used for casting. The advantage is that the cost is lower, because the sand used in the mold can be reused; the disadvantage is that the production of the mold is time-consuming, and the mold itself cannot be reused, and the finished product must be destroyed. [0004] 2. Special casting, according to the molding material, can be divided into special casting with natural mineral sand and stone as the main molding material (such as investment casting, mud casting, shell casting, negative pressure casting, solid casting, ceramic cast...

AI Technical Summary

Problems solved by technology

[0007] In order to make up for the deficiencies of the existing technology, it is necessary to accurately measure the workpiece to be molded and collect data when taking the mold of the existing template, and then complete the template production through the cutting operation of the vertical hole machining center after modeling. The problem of time-consuming and labor-intensive mold taking for workpieces that do not require high precision, and the low efficiency of mold taking, a film-coated sand shell mold casting process proposed by the present invention

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