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3D printing sand, high-temperature and cooling treatment process and application thereof

A processing technology and 3D printing technology, applied in the field of 3D printing materials, can solve problems such as affecting product quality, expansion and contraction, and increase in air volume of the mold, so as to reduce the probability of veining and pores, improve production efficiency, and improve surface quality. Effect

Inactive Publication Date: 2020-07-07
天津致勤新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the casting process, the resin is used as a binder and mixed with natural silica sand, and the foundry mixture is hardened under the action of a curing agent to obtain a sand mold for casting. The content of natural silica sand accounts for 95-99%, so the quality of natural silica sand It has a great impact on the performance of the product, but the way to improve the strength of the sand mold in the prior art is to increase the content of the resin. The increase of the resin content will increase the gas generation of the mold, and at the same time, the existing natural silica sand will It is easy to expand and shrink due to temperature, which will affect the quality of the product

Method used

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  • 3D printing sand, high-temperature and cooling treatment process and application thereof
  • 3D printing sand, high-temperature and cooling treatment process and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A 3D printing sand high temperature and cooling treatment process, the treatment process includes the following steps:

[0031] (1) High-temperature roasting treatment of natural silica sand; select natural silica sand with a particle size of 70 meshes, with a mud content of 0.17% and a silicon content of 99.4%, and transport this natural silica sand to a vertical roasting kiln. Roasting treatment, the treatment time is 90 minutes;

[0032] (2) Transport the natural silica sand obtained by the high temperature treatment into a cooling bed for cooling treatment so that the temperature drops to 50° C. to obtain printing sand.

Embodiment 2

[0034] A 3D printing sand high temperature and cooling treatment process, the treatment process includes the following steps:

[0035] (1) High-temperature roasting treatment of natural silica sand; select natural silica sand with a particle size of 120 meshes, which has a mud content of 0.14% and a silicon content of 99.6%, and transports this natural silica sand to a vertical roasting kiln. Roasting treatment, the treatment time is 95 minutes;

[0036] (2) Transport the natural silica sand obtained by the high temperature treatment into the cooling bed for cooling treatment, and lower the temperature to 70° C. to obtain the printing sand.

Embodiment 3

[0038] A 3D printing sand high temperature and cooling treatment process, the treatment process includes the following steps:

[0039] (1) High-temperature roasting treatment of natural silica sand; select natural silica sand with a particle size of 140 meshes, with a mud content of 0.15% and a silicon content of 99.6%, and transport the natural silica sand to a vertical roasting kiln. Roasting treatment, the treatment time is 100 minutes;

[0040] (2) Transport the natural silica sand obtained by the high temperature treatment into the cooling bed for cooling treatment, so that the temperature is lowered to 80° C., and the printing sand is obtained.

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Abstract

The invention discloses a 3D printing sand, a high-temperature and cooling treatment process and application thereof, and belongs to the technical field of 3D printing materials. The 3D printing sandhigh-temperature and cooling treatment process is characterized by comprising the following steps of (1) high-temperature roasting treatment of natural silica sand, specifically, roasting the naturalsilica sand at the temperature of 900 to 950 DEG C, wherein the treatment time is 90 to 100 minutes; and (2) cooling treatment of the natural silica sand obtained through high-temperature treatment, wherein the temperature of the natural silica sand is reduced to 50-80 DEG C, and the printing sand is obtained. After the process is adopted for treatment, it can be guaranteed that the silica sand does not expand or contract at the high temperature, the strength of the silica sand is improved, and the pore defect caused by expansion or contraction can be effectively relieved.

Description

technical field [0001] The invention relates to the field of 3D printing materials, in particular to a 3D printing sand, high temperature and cooling treatment process and its application. Background technique [0002] In the production of castings, sand casting is a commonly used casting process, but the more complex the structural shape of the casting, the more troublesome the mold modeling is. Therefore, many modeling tasks of sand casting molds today must be completed by 3D printers. The natural silica sand used in the 3D printing process has high silica content, good heat resistance and regular particle size, and is an important material for casting sand molds. [0003] At present, in the casting process, the resin is used as a binder and mixed with natural silica sand, and the foundry mixture is hardened under the action of a curing agent to obtain a sand mold for casting. The content of natural silica sand accounts for 95-99%, so the quality of natural silica sand It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00B22C5/08B22C1/00B33Y40/00B33Y70/00
CPCB22C1/00B22C5/00B22C5/08B33Y40/00B33Y70/00
Inventor 陈文龙张力郑恒生王荣亮
Owner 天津致勤新型材料有限公司
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