A rapid prototyping method for microwave solidified water-soluble salt core

A microwave curing, water-soluble salt technology, used in cores, mold components, casting molding equipment, etc., can solve the problems of low salt core strength, easy corrosion of nozzles, short service life, etc., to achieve fast curing speed and avoid scratches , to ensure the effect of strength

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 microwave solidified water-soluble salt core
  • A rapid prototyping method for microwave solidified water-soluble salt core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of rapid prototyping method of microwave curing water-soluble salt core of the present embodiment, comprises the following steps:

[0044] 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;

[0045] S200, configure the spray liquid, mix the water and the additive evenly, and configure it into an aqueous solution with a viscosity of 1-10cps;

[0046] S300, micro-droplet injection forming, flatly spread the ground and screened inorganic salt powder on the lifting workbench 163, and the micro-droplet injection nozzle sprays the aqueous solution configured in S200 according to the drop path generated by the solid model of the salt core, and wait until the layer is micro After the droplet spraying is completed, the lifting table goes down by 0.01-1mm, and the subsequent dripping process of discrete layers is completed in turn until the dripping process...

Embodiment 2

[0062] A kind of rapid prototyping method of microwave curing water-soluble salt core of the present invention, its forming process is as follows:

[0063] S100, pretreatment of inorganic salt, drying potassium carbonate at 160-180°C, then ball milling and sieving on a ball mill to obtain 140-200 mesh salt powder for later use;

[0064] S200, configure the spray liquid, dissolve polyethylene glycol and starch into water, and configure a solution with a viscosity of 3-5cps;

[0065] S300. Droplet jet forming of water-soluble salt core. Lay the ground and sieved potassium carbonate powder on the lifting workbench 163, and spray the aqueous solution configured by S200 according to the droplet path generated by the solid model of the salt core. The platform 163 goes down by 0.02mm, and completes the subsequent dripping processes on discrete levels in sequence until the dripping processes on all discrete levels are completed;

[0066] S400, intermittent microwave curing. Take ou...

Embodiment 3

[0070] A kind of rapid prototyping method of microwave curing water-soluble salt core of the present invention, its forming process is as follows:

[0071] S100, pretreatment of inorganic salts. Potassium carbonate and potassium chloride are dried at 160-180°C and 100-105°C, respectively, and then ball milled and sieved on a ball mill to obtain two salt powders of 140-200 mesh for use;

[0072] S200, configure the spray liquid, dissolve polyacrylamide, polyethylene glycol, fatty acid sorbitan and polysorbate into water, and configure it into a solution with a viscosity of 3-5cps;

[0073] S300, micro-droplet spray forming of water-soluble salt core, the ground and screened potassium carbonate powder and potassium chloride powder are mixed evenly according to the mass ratio of 6:4, and then spread on the lifting workbench 163, and micro-drop spraying The spray head sprays the aqueous solution configured by S200 according to the droplet path generated by the solid model of the ...

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Abstract

The invention discloses a rapid forming method of a microwave-cured water-soluble salt core, and belongs to the technical field of casting. The method comprises the following steps that S100, inorganic salt is pretreated; S200, a jetting liquid is prepared; S300, micro-drop injection moulding is performed; S400, intermittent microwave curing is performed; and S500, the salt core is infiltrated orsprayed with an inorganic salt solution; S600, secondary intermittent microwave curing is carried out; and S700, sintering is carried out. According to the method, the salt core is subjected to the microwave curing and the pre-forming, and then the salt core is soaked in the inorganic salt solution and is subjected to the secondary microwave curing and the sintering; due to the fact that the wettability of the inorganic salt solution is extremely high, the pores of the preformed salt core can be fully wetted and filled, the inorganic salt is crystallized and separated out in the secondary microwave curing process, and the strength of the salt core is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a rapid prototyping method for microwave-solidified 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 w...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C9/12
CPCB22C9/105B22C9/12
Inventor 杨晓娜黄贞益梁珊张龙代龙飞
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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