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A rapid prototyping method for infrared pre-cured water-soluble salt core

An infrared and water-soluble salt technology, applied in the direction of cores, casting components, casting and molding equipment, etc., can solve the problems of low strength of salt cores, short service life, and high production cost of personalized products, avoiding scratches and ensuring strength. Effect

Active Publication Date: 2020-01-10
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A rapid prototyping method for infrared pre-cured water-soluble salt core
  • A rapid prototyping method for infrared pre-cured water-soluble salt core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The rapid prototyping method of a kind of infrared pre-cured water-soluble salt core of embodiment, concrete steps are as follows:

[0041] S100, pretreatment of inorganic salts, drying one or more water-soluble inorganic salts, grinding, mixing, and sieving to obtain 100-200 mesh salt powder for later use;

[0042] S200, configure the spray liquid, mix water and additives uniformly, configure an aqueous solution with a viscosity of 7, and put the spray liquid into the liquid mixing chamber 120 of the molding sand spraying unit 100;

[0043] S300, micro-droplet injection molding and infrared heating pre-curing, the spreading device 142 flatly spreads the inorganic salt powder obtained in step S100 on the lifting workbench 163, and the liquid spraying device 122 sprays the powder obtained in S200 according to the drop path generated by the solid model of the salt core The configured spray liquid, after the spraying of micro-droplets on this layer is completed, the infrar...

Embodiment 2

[0058] The rapid prototyping method of a kind of infrared pre-cured water-soluble salt core of embodiment, concrete steps are as follows:

[0059] S100, pretreatment of inorganic salt, drying potassium chloride and potassium carbonate at 100-105°C and 160-180°C respectively, grinding (or grinding after mixing), and sieving to obtain 140-200 mesh salt powder, and According to potassium chloride 35-45wt%, the ratio of potassium carbonate 55-65% is mixed evenly for subsequent use;

[0060] S200, configure the spray liquid, mix water and polyvinyl alcohol evenly, configure an aqueous solution with a viscosity of 3 cps, put the spray liquid into the liquid mixing chamber 120 of the molding sand spraying unit 100;

[0061]S300, micro-droplet injection molding and infrared heating pre-curing, the spreading device 142 flatly spreads the inorganic salt powder obtained in step S100 on the lifting workbench 163, and the liquid spraying device 122 sprays the powder obtained in S200 accord...

Embodiment 3

[0065] The rapid prototyping method of a kind of infrared pre-cured water-soluble salt core of embodiment, concrete steps are as follows:

[0066] S100, pretreatment of inorganic salts, drying sodium chloride and sodium carbonate at 100-105°C and 200-205°C respectively, grinding (or grinding after mixing), and sieving to obtain 140-200 mesh salt powder, and According to sodium chloride 55-60wt%, the ratio of sodium carbonate 45-55% is mixed evenly for subsequent use;

[0067] S200, configure the spray liquid, mix water, polyethylene glycol, and polyacrylamide evenly, configure an aqueous solution with a viscosity of 2 cps, and put the spray liquid into the liquid mixing chamber 120 of the molding sand spraying unit 100;

[0068] S300, micro-droplet injection molding and infrared heating pre-curing, the spreading device 142 flatly spreads the inorganic salt powder obtained in step S100 on the lifting workbench 163, and the liquid spraying device 122 sprays the powder obtained i...

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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 technical field of casting, and specifically relates to a rapid prototyping method for infrared pre-cured water-soluble salt cores. Background technique [0002] Water-soluble cores are widely used in the production of castings with complex inner cavities and curved channels because of their excellent water-soluble collapsibility and environmental friendliness. In the field of foundry industry, the 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 core mainly includes forming methods such as pressing and sintering method and melting casting method. The pressing and sintering method is mainly to mix the raw materials for preparing the salt core, press and form them in the salt core mold, and then bake and sinter at a certain temperature. For example: Chinese patent CN200810018179.8 mixes metal salt, binder, fiber and whi...

Claims

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Application Information

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Patent Type & Authority Patents(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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