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Rapid formation method of infrared precuring water-soluble salt core

An infrared, water-soluble salt technology, applied in the direction of core, mold composition, casting molding equipment, etc., can solve the problems of low salt core strength, short service life, high production cost of personalized products, etc., to avoid scratches and ensure strength Effect

Active Publication Date: 2018-09-11
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the traditional forming method of the existing water-soluble salt core has a long preparation cycle, the production cost of individualized products is relatively high, and the existing micro-droplet spray forming water-soluble salt core uses inorganic salt solution as the spray liquid, and the nozzle is easy to corrode. Problems with short service life and low salt core strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The rapid prototyping method of an infrared pre-cured water-soluble salt core of the embodiment, the specific steps are as follows:

[0043] S100. Pretreatment of inorganic salt, drying, grinding, mixing, and sieving one or more water-soluble inorganic salts to obtain 100-200 mesh salt powder for later use;

[0044] S200. Configure spray liquid, mix water and additives evenly, configure it into an aqueous solution with a viscosity of 1-10 cps, and put the spray liquid into the liquid dispensing bin 120 of the sand spraying unit 100;

[0045] S300, droplet spray forming and infrared heating pre-curing, the paving device 142 spreads the inorganic salt powder obtained in step S100 on the lifting table 163, and the spray device 122 sprays S200 according to the drop path generated by the salt core solid model. After the spraying of the micro-droplets on the layer is completed, the infrared heating plate 180 is turned on to perform infrared heating and curing on the layer, and the p...

Embodiment 2

[0060] The rapid prototyping method of an infrared pre-cured water-soluble salt core of the embodiment, the specific steps are as follows:

[0061] S100, pretreatment of inorganic salt, drying potassium chloride and potassium carbonate at 100-105℃ and 160-180℃ respectively, grinding (or grinding after mixing) and sieving to obtain 140-200 mesh salt powder, and Mix well in the proportion of 35-45wt% potassium chloride and 55-65% potassium carbonate for later use;

[0062] S200. Arrange the spray liquid, mix water and polyvinyl alcohol evenly to form an aqueous solution with a viscosity of 3 cps, and put the spray liquid into the liquid dispensing bin 120 of the sand spraying unit 100;

[0063] S300, droplet spray forming and infrared heating pre-curing, the paving device 142 spreads the inorganic salt powder obtained in step S100 on the lifting table 163, and the spray device 122 sprays S200 according to the drop path generated by the salt core solid model. After the spraying of the ...

Embodiment 3

[0067] The rapid prototyping method of an infrared pre-cured water-soluble salt core of the embodiment, the specific steps are as follows:

[0068] S100, pretreatment of inorganic salt, drying sodium chloride and sodium carbonate at 100-105℃ and 200-205℃ respectively, grinding (or grinding after mixing) and sieving to obtain 140-200 mesh salt powder, and Mix well in the proportion of 55-60wt% sodium chloride and 45-55% sodium carbonate for later use;

[0069] S200. Configure spray liquid, mix water, polyethylene glycol, and polyacrylamide evenly to form an aqueous solution with a viscosity of 2 cps, and put the spray liquid into the liquid dispensing bin 120 of the sand spraying unit 100;

[0070] S300, droplet spray forming and infrared heating pre-curing, the paving device 142 spreads the inorganic salt powder obtained in step S100 on the lifting table 163, and the spray device 122 sprays S200 according to the drop path generated by the salt core solid model. After the spraying of...

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Abstract

A rapid formation method of an infrared precuring water-soluble salt core belongs to the field of casting techniques. The method comprises the following steps: S100, pretreatment of inorganic salt; S200, preparation of a jetting fluid; S300, droplet jetting forming and infrared heating precuring; S400, wetting or spraying of the inorganic salt solution; S500, intermittent microwave curing; and S600, sintering. After infrared heating preformation of the salt core, the salt core then undergoes inorganic salt solution, secondary microwave curing and sintering. As the inorganic salt solution has extremely strong wettability, pores of the salt core can be fully wetted and filled, and crystallization is achieved to precipitate out inorganic salt during the secondary microwave curing process. Strength of the salt core is remarkably raised.

Description

Technical field [0001] The invention belongs to the field of casting technology, and specifically is a rapid forming method of infrared pre-curing water-soluble salt core. Background technique [0002] Water-soluble cores have a wide range of applications in the production of castings with complex cavities and curved channels due to their excellent water-soluble collapsibility and environmentally friendly characteristics. In the field of foundry industry, water-soluble core made of soluble salt as the main material is called water-soluble salt core. [0003] At present, the production of water-soluble salt cores mainly includes forming methods such as pressing and sintering, melting and casting. The pressing and sintering method is mainly to mix the raw materials for the preparation of the salt core, press and shape it in a salt core mold, and then perform baking and sintering at a certain temperature. For example: Chinese patent CN200810018179.8 mixes the metal salt, binder, fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22C1/00B22C9/12B33Y10/00B33Y30/00
CPCB22C1/00B22C9/105B22C9/12B33Y10/00B33Y30/00
Inventor 张龙谢谦谢玲玲陈锋
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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