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Microwave curing moulding system of water-soluble moulding core

A microwave-cured and water-soluble core technology, applied in cores, mold components, casting molding equipment, etc., can solve the problems of low core strength, short service life, high production cost of personalized products, etc., to avoid scratches, Guaranteed strength effect

Active Publication Date: 2018-07-31
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the traditional forming method of the existing water-soluble core has a long preparation period, the production cost of individualized products is relatively high, and the existing micro-droplet spray forming water-soluble core uses inorganic salt solution as the spray liquid, and the nozzle is easy to corrode. Problems with shorter service life and lower core strength

Method used

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  • Microwave curing moulding system of water-soluble moulding core
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Refer to attached figure 1 and figure 2As shown, a microwave curing molding system for water-soluble cores in this embodiment includes a molding sand spraying unit 100, a core curing unit 200, a core soaking unit 300, and a core sintering unit 400. The molding sand spraying unit 100 includes a The liquid silo 120, the liquid spraying device 122 and the material spreading device 142, the liquid dispensing silo 120 is used to store the configured spraying liquid, the material spreading device 142 is used to lay the molding sand, and the liquid spraying device 122 is laid layer by layer according to the layer thickness of 0.01-1mm The good molding sand is sprayed with spray liquid, and the spray liquid makes the molding sand aggregate and condense to form the core 230 to be cured; the core curing unit 200 is used to perform two intermittent microwave heating and curing on the cured core 230 to become the cured core 320; the core soaking unit The core 300 is used to soak ...

Embodiment 2

[0053] The microwave curing molding system of a water-soluble core of the present implementation, its operation process is as follows:

[0054] S100, configure a spray liquid, dissolve polyethylene glycol, starch, potassium chloride, potassium hydroxide, and oxalic acid in water, and configure it into a solution with a viscosity of 3-5cps and a pH of 7;

[0055] S200, droplet spraying and forming, laying 100 / 140 mesh mullite sand on the lifting table 163, the head of the liquid spraying device 122 sprays the aqueous solution configured in S100 according to the droplet path generated by the core solid model. After the spraying of micro-droplets is completed, the lifting table 163 goes down by 0.05mm, and the dripping process of the subsequent discrete layers is completed in turn, until the dripping process of all discrete layers is completed;

[0056] S300, intermittent microwave curing, taking out the injection-molded core together with the cylinder body, placing it in the mic...

Embodiment 3

[0060] The microwave curing molding system of a water-soluble core of the present implementation, its operation process is as follows:

[0061] S100, configure a spray liquid, dissolve polyacrylamide, polyethylene glycol, potassium carbonate, potassium chloride, and citric acid in water to prepare a solution with a viscosity of 3-5cps and a pH of 7;

[0062] S200, the droplet spray forming of the water-soluble core, the 70 / 100 mesh silica sand and the 100 / 140 mesh mullite sand are evenly mixed and then laid on the lifting worktable 163, the liquid spray device 122 generates droplets according to the core solid model The aqueous solution configured in the liquid path S100 is sprayed. After the spraying of micro-droplets at this level is completed, the lifting table 163 goes down by 0.03mm, and successively completes the dripping process of the subsequent discrete levels until the dripping process of all discrete levels is completed;

[0063] S300, intermittent microwave curing,...

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Abstract

The invention discloses a microwave curing moulding system of a water-soluble moulding core and belongs to the technical field of casting. The microwave curing moulding system comprises a moulding sand spraying unit, a moulding core curing unit, a moulding core immersion unit and a moulding core sintering unit, wherein the moulding sand spraying unit comprises a liquid mixing bin, a liquid spraying device and a material spreading device. The liquid mixing bin is used for storing mixed spraying liquid. The material spreading device is used for spreading sand. The liquid spraying device sprays spraying liquid to spread moulding sand layer by layer in accordance with the layer thickness of 0.01-1mm. The spraying liquid enables the moulding sand to aggregate and to coagulate to a to-be-cured moulding core. The moulding core curing unit is used for conducting microwave heating for the to-be-cured moulding core to cure the to-be-cured moulding core to a cured moulding core. The moulding coreimmersing unit is used for immersing the cured moulding core. The moulding core sintering unit is used for sintering the to-be-sintered moulding core. The microwave curing moulding system realizes moulding core fast producing without moulds. The moulding core curing unit adapts microwave heating realizing synchronous heating both interiorly and exteriorly. The intermittent microwave heating method enables inner layer water to be evaporated completely. Thus, the strength of the moulding core is ensured.

Description

technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a microwave solidification molding system for a water-soluble core. Background technique [0002] There are a large number of aluminum alloy castings with complex inner cavities and curved channels in the fields of automobiles, construction machinery and aerospace. These complex aluminum alloy castings can be produced with built-in metal cores, resin sand cores and water soluble cores. Due to the complex process of metal core core making, and the use of chemical core removal is easy to cause environmental pollution, this has prompted organic resin sand cores with excellent comprehensive performance to be widely used in the production of such castings. However, with the development of technology, the forming temperature of aluminum alloy castings is lowered, and the collapse performance of the organic resin sand cores that are easy to collapse is weakened. Problems su...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C13/12
CPCB22C9/105B22C13/12
Inventor 张龙章小峰谢谦杨晓娜王浩
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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