A microwave curing molding system for water-soluble cores

A microwave curing, water-soluble core technology, applied in the direction of core, mold components, casting and molding equipment, etc., can solve the problems of low core strength, short service life, long preparation cycle, etc., to avoid scratches and ensure 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

[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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  • A microwave curing molding system for water-soluble cores
  • A microwave curing molding system for water-soluble cores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Refer to attached figure 1 with figure 2As shown, a microwave curing molding system for a water-soluble core 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, and the molding sand spraying unit 100 includes a matching Liquid tank 120, liquid spraying device 122 and material laying device 142, the liquid distribution tank 120 is used to store the configured spray 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 gather 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 solidified core 230 to become the solidified core 320; the core soaking unit 300 is used to soak th...

Embodiment 2

[0053] A microwave curing molding system for a water-soluble core in this implementation, its operation process is as follows:

[0054] S100, configure the 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 value of 7;

[0055] S200, micro-droplet injection forming, laying 100 / 140 mesh mullite sand on the lifting worktable 163, the head of the liquid spraying device 122 sprays the aqueous solution configured in S100 according to the drop path generated by the solid model of the core, and waits for the layer After the spraying of micro-droplets is completed, the lifting table 163 moves down by 0.05mm, and the subsequent dripping processes on discrete levels are completed in sequence until the dripping processes on all discrete levels are completed;

[0056] S300. Intermittent microwave curing. Take out the spray-molded core together with the c...

Embodiment 3

[0060] A microwave curing molding system for a water-soluble core in this implementation, its operation process is as follows:

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

[0062] S200, micro-droplet injection forming of water-soluble core, mix 70 / 100 mesh silica sand and 100 / 140 mesh mullite sand evenly and spread them on the lifting worktable 163, the liquid spray device 122 generates the droplets according to the solid model of the core The liquid path sprays the aqueous solution configured in S100, and after the spraying of micro-droplets on this level is completed, the lifting table 163 moves down by 0.03mm, and the subsequent dripping processes on discrete levels are completed in sequence until the dripping processes on all discrete levels are completed;

[0063] S300. Int...

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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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Patent Type & Authority Patents(China)
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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