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Mold processing method based on gypsum sand self-hardening molding

A processing method and molding technology, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve the problems of difficult regeneration of old sand, high comprehensive cost, large solid waste discharge, etc., and achieve simple molding production process and solve Difficult to disintegrate, excellent disintegration effect

Pending Publication Date: 2019-12-03
王海江
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using traditional refractory materials for sand casting, in the traditional process, it is difficult to regenerate old sand such as sodium silicate sand and alkali phenolic resin sand, high energy consumption, high overall cost, large solid waste discharge, and poor environmental protection

Method used

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  • Mold processing method based on gypsum sand self-hardening molding

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Embodiment Construction

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0026] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a specific embodiment of the casting mold processing method based on gypsum sand self-setting molding provided by the present invention.

[0027] In a specific embodiment, this patent technology refers to high-strength gypsum powder calcined at high temperature (containing α-type hemihydrate gypsum or β-type hemihydrate gypsum) through professional extrusion granulation to form 30 mesh-140 mesh high For high-strength gypsum sand, add a certain proportion of other foundry sand, resin, curing agent, retarder and powder surface active materials according to the material and use requirements of the casting and add them in sequence to the...

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Abstract

The invention relates to a mold processing method based on gypsum sand self-hardening molding. The mold processing method includes the following steps that S1, gypsum sand is prepared, the gypsum sandof a 30 mesh-140 mesh particle size is formed by extrusion granulation with gypsum powder obtained by high temperature calcination; S2, ingredient sand, resin, a curing agent, a retarder for moldingand powder surface activity materials are added into the gypsum sand with the preset proportion in sequence to obtain a mixed sand material; S3, the mixed sand material are fully stirred and evenly mixed, and the stirred and evenly mixed sand material is transported to a sand box for molding and compaction; S4, after the mixed sand material completes self-hardening in the sand box, and molding isconducted to obtain a mold blank; and S5, post-processing is conducted on the mold blank to obtain mold. The processing method has the characteristics of high strength gypsum and high strength, good stability of a casting size is ensured, and precision is high.

Description

technical field [0001] The invention relates to casting mold forming technology, in particular to a casting mold processing method based on gypsum sand self-hardening. Background technique [0002] The current casting molding methods include sand casting, silica sol investment casting, water glass investment casting, coated sand heating and solidification, cold box process, plaster casting and other processes. [0003] Gypsum casting is a new precision casting technology developed in the 1970s. It assembles the investment mold and fixes it on the sand box plate specially used for grouting, pours the gypsum slurry in under vacuum, and after the slurry is condensed, it can be removed by drying, and then dried, Roasting becomes a gypsum type, and casting is obtained by casting under vacuum. Gypsum sand uses hemihydrate gypsum as the base material, high molecular polymer as the cementitious material, and inorganic fillers through dry mixing. [0004] Using traditional refract...

Claims

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Application Information

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IPC IPC(8): C04B26/02C04B28/00B22C7/00B22C1/00B22C9/02
CPCB22C1/00B22C7/00B22C9/02C04B26/02C04B28/00C04B2111/0087C04B14/365C04B14/06C04B14/041C04B18/023C04B2103/0068C04B2103/22C04B2103/40
Inventor 王海江
Owner 王海江
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