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Lost foam casting process

A lost foam casting and process technology, applied in the field of forging, can solve the problems of unsatisfactory sealing and strength of lost foam casting molds, rough process design, and achieve high surface finish and dimensional accuracy, reasonable process route design, and modeling. cost reduction effect

Inactive Publication Date: 2015-09-02
LIUZHOU KEERTE FORGING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing lost foam casting technology, due to the rough design of the process flow, the sealing and strength of the lost foam casting mold are not ideal

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0012] The present invention is realized through the following specific embodiments:

[0013] A lost foam casting process, comprising the following steps:

[0014] Step 1: Use polystyrene resin beads to make foam plastic white molds, combine the casting system, brush and spray special high-temperature resistant paint on the surface of the gasification mold, and dry. The particle size of the polystyrene resin beads is 0.18mm. The foaming ratio is 40 times;

[0015] Step 2: Put the interlayer sand box on the workbench, fill it with dry sand, vibrate it, and scrape it flat, put the dried gasification mold on the bottom sand, fill it with dry sand, and scrape the box mouth with slight vibration The dry sand is dry quartz sand, and the micro-vibration time is 30 seconds;

[0016] Step 3: Cover with plastic film, put the sprue cup, connect the vacuum system to suck the vacuum, dry sand is fastened and formed, and then pour. The casting time after pouring is 3 minutes, and the cast...

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Abstract

The invention relates to the technical field of casting, and particularly relates to a lost foam casting process. The lost foam casting process comprises the following steps: step 1. producing a foam plastic lost foam pattern by adopting polystyrene resin beads, combining a pouring system, brushing and spraying a special high-temperature resistant coating on the surface of a gasified pattern, and drying; step 2. arranging an interlayer sand box on a workbench, filling dry sand for compacting and leveling, placing the oven-dried gasified pattern on base sand, filling the dry sand, and carrying out micro-vibration for leveling a box mouth; step 3. covering by using a plastic film, placing a sprue cup, connecting a vacuum system for vacuum absorption, and pouring after fastening and molding the dry sand; and step 4. releasing vacuum, turning the box after a casting is condensed, and taking out the casting from the loose dry sand. According to the lost foam casting process disclosed by the invention, the process route design is reasonable, the surface smoothness and dimensional accuracy of the produced casting are high, the production working procedures are simple, the utilization rate of metal is high, all used sand is basically recycled, and the modelling cost is lowered.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a lost foam casting process. Background technique [0002] Lost Foam Casting is a new technology with nearly no margin and precise molding. This process does not require mold taking, no parting surface, and no sand core, so the casting has no flash, burr, and draft angle, which reduces the risk of damage due to the combination of cores. resulting in dimensional errors. . However, in the existing lost foam casting technology, due to the rough design of the process flow, the sealing and strength of the lost foam casting mold are not ideal. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a lost foam casting process. [0004] Technical effect of the present invention is realized through the following technical solutions: [0005] A lost foam casting process, comprising the following steps: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 何拥军何嘉圣何嘉贤蒋漓洪杜贵明梁兵赖卫华
Owner LIUZHOU KEERTE FORGING MACHINERY
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