Precoated sand accelerating casting part forming and preparation method thereof

A technology for castings and coated sand, which is used in foundry molding equipment, casting molds, metal processing equipment, etc. The effect of forming speed

Inactive Publication Date: 2017-08-29
李吕军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this patent provides a coated sand that speeds up the molding speed of castings and its preparation method to solve the problem that the molding speed of most coated sands is relatively slow and the molding effect is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Coated sand to speed up the forming of castings, prepared from the following components:

[0026] Silica sand, ceramsite sand, magnetite sand, thermoplastic phenolic resin, modified polyester resin, hexamethylenetetramine, ammonium acetate, calcium stearate, ceramic glaze powder, ammonium stearate and molding agent;

[0027] The modified polyester resin is prepared by using polyester resin to be processed by intermediate frequency microwave for 4 minutes, and then centrifuged with a centrifuge for 25 seconds;

[0028] The molding agent is prepared from: epoxy resin, paraffin, polyethylene, metal powder, high temperature resistant additives, and toughening additives;

[0029] The metal powder used in the above-mentioned molding agent is composed of iron powder, chromium carbide powder and tungsten carbide powder, and the mixing ratio is 2:1:1;

[0030] The coated sand for accelerating the molding speed of castings is prepared from the following components in parts by ma...

Embodiment 2

[0040] Coated sand to speed up the forming of castings, prepared from the following components:

[0041] Silica sand, ceramsite sand, magnetite sand, thermoplastic phenolic resin, modified polyester resin, hexamethylenetetramine, ammonium acetate, calcium stearate, ceramic glaze powder, ammonium stearate and molding agent;

[0042] The modified polyester resin is prepared by using polyester resin to be processed by intermediate frequency microwave for 2-5 minutes, and then centrifuged with a centrifuge for 20-30 seconds;

[0043] The molding agent is prepared from: epoxy resin, paraffin, polyethylene, metal powder, high temperature resistant additives, and toughening additives;

[0044] The metal powder used in the above-mentioned molding agent is composed of iron powder, chromium carbide powder and tungsten carbide powder, and the mixing ratio is 2:1:1;

[0045] The coated sand for accelerating the molding speed of castings is prepared from the following components in parts ...

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PUM

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Abstract

The invention relates to the field relative to precoated sand casting technologies, in particular to precoated sand accelerating casting part forming. The precoated sand is prepared from the following components of a silica sand body, a ceramsite sand body, a magnetite sand body, thermoplastic phenolic resin, modified polyester resin, hexamethylene tetramine, ammonium acetate, calcium stearate, ceramic glaze powder, ammonium stearate and a forming agent. According to the precoated sand accelerating casting part forming, the problem that a majority of precoated sand is low in forming speed and poor in forming effect is solved, the forming agent is added into the precoated sand, and the specific precoated sand preparation technology is matched, so that through the preparation method of the precoated sand, the casting part forming speed can be increased, and the casting part forming quality can be improved, and casting efficiency is improved.

Description

Technical field: [0001] The invention relates to the related field of coated sand casting technology, in particular to coated sand for accelerating the molding speed of castings and a preparation method thereof. Background technique: [0002] Casting refers to the processing method of melting solid metal into liquid and pouring it into a mold of a specific shape, and waiting for it to solidify and form. The metals to be cast include: copper, iron, aluminum, tin, lead, etc. The common casting materials are raw sand, clay, water glass, resin and other auxiliary materials. Special casting molds include: investment casting, lost foam casting, metal casting, ceramic casting, etc.; [0003] In the ordinary casting process, a large amount of coated sand is used to prepare the model, and the coated sand is a kind of high-quality selected natural quartz sand as the original sand, thermoplastic phenolic resin, urotropine and reinforcing agent. raw material. According to the differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 李吕军
Owner 李吕军
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