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

A technology of water-soluble cores and infrared rays, which is applied in the direction of cores, mold components, molds, etc., can solve the problems of high production cost, short service life, and low core strength of personalized products, and achieve easy water loss and improved Strength, solve the effect of short service life

Active Publication Date: 2020-01-03
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 cycle, 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. , short service life and low core strength

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The rapid prototyping method of a kind of infrared pre-cured water-soluble core of the present embodiment comprises the following steps:

[0043] S100, configure the spray liquid, mix water and additives evenly, and prepare an aqueous solution with a viscosity of 1-10 cps and a pH value of 7;

[0044] S200, micro-droplet liquid spraying forming and infrared heating pre-solidification, the molding sand is spread on the lifting table 163, and the liquid spraying device 122 sprays the aqueous solution configured in S100 according to the micro-droplet liquid spraying path generated by the solid model of the core. After the micro-droplet spraying is completed, the infrared heating plate 180 is turned on to perform infrared heating and curing on the layer. After curing, the elevating table 163 descends by 0.01-1 mm to complete the follow-up micro-droplet liquid spraying process and infrared heating pre-curing process on discrete levels in sequence until the liquid spraying an...

Embodiment 2

[0061] The above-mentioned "infiltration" can also be realized by other means, such as by spraying, a rapid prototyping method of infrared pre-cured water-soluble core in this embodiment, including:

[0062] S100, configure the spray liquid, dissolve water, polyvinyl alcohol, sodium chloride, sodium carbonate, and oxalic acid in water, and configure it into an aqueous solution with a viscosity of 3 cps and a pH value of 7;

[0063] S200, micro-drop liquid spray forming of water-soluble core and intermittent infrared heating pre-curing, lay 100 / 140 mesh silica sand on the lifting workbench, and the liquid spray device 122 sprays the micro-drop liquid spray path generated by the solid model of the core For the aqueous solution prepared in S100, after the spraying of the droplets on the layer is completed, the infrared heating plate 180 is turned on to perform intermittent infrared heating and curing on the layer. After curing, the elevating table 163 descends by 0.1 mm, and sequ...

Embodiment 3

[0068] The rapid prototyping method of a kind of infrared pre-cured water-soluble core of the present embodiment comprises:

[0069] S100, configure the spray liquid, dissolve water, polyethylene glycol, polyacrylamide, potassium chloride, potassium carbonate, and citric acid in water, and configure it into an aqueous solution with a viscosity of 2 cps and a pH value of 7;

[0070] S200, droplet spray forming of water-soluble core and continuous infrared heating pre-curing, mix 70 / 100 mesh silica sand and 100 / 140 mesh magnesia sand in a ratio of 7:3 and spread them on the lifting workbench 163 , the liquid spraying device 122 sprays the aqueous solution configured in S100 according to the droplet spraying path generated by the core solid model, and after the liquid spraying of the droplets on the layer is completed, the infrared heating plate 180 is turned on to perform infrared heating and pre-curing on the layer. After curing, the elevating table 163 descends by 0.2 mm to co...

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Abstract

The invention discloses a rapid forming method for an infrared ray procuring water-soluble core, and belongs to the technical field of casting. The method comprises the following steps: S100, preparing a jetting fluid; S200, jetting and forming a micro-droplet, heating and procuring through the infrared ray; S300, soaking with or spraying an inorganic salt solution; S400, intermittently microwaving and curing; and S500, sintering. After being microwaved, hardened and procured, the core is soaked in the inorganic salt solution and is secondarily microwaved, cured and sintered, the jetting fluidcontains a high polymer material absorbing the infrared ray easily, so that the water is easy to disperse in the infrared ray heating process, the water soluble core with higher initial strength is favorably obtained, the wetting performance of the inorganic salt solution is quite strong, a pore in the preformed core is fully wetted and filled, an inorganic salt is crystalized and precipitated inthe secondary microwaving and curing process, and the strength of the core is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a rapid prototyping method for an infrared pre-cured water-soluble mold 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. P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/10
CPCB22C9/10
Inventor 杨晓娜黄贞益王萍张龙吕璇
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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