Process for improving full mold casting engine cylinder yield

A technology of engine cylinder block and lost foam casting, which is applied in the direction of casting molding equipment, casting mold components, manufacturing tools, etc. It can solve the problems of reducing cleaning, saving machining internal defects, affecting the yield of engine cylinder block, and difficult fixing of quartz sand, etc. problems, to achieve the effect of ensuring pouring stability, increasing viscosity, and preventing sand collapse

Inactive Publication Date: 2016-12-21
ANHUI QUANCHAI TIANHE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lost foam casting is a full-type casting of foam plastic molds using binder-free dry sand combined with vacuum technology. It combines foam models similar in size and shape to castings to form model clusters. After brushing and drying refractory coatings, they are buried in Vibration molding in dry quartz sand, pouring under negative pressure, vaporizes the model, liquid metal occupies the position of the model, and solidifies and cools to form a new casting method. Compared with traditional casting technology, lost foam casting has the following characteristics, casting quality Good quality, low cost, unlimited material, suitable size, size, high precision, smooth surfac...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A process for improving the yield rate of lost foam casting engine cylinders includes the following steps:

[0021] S1. Molding. Install a foamed plastic mold with the same size and shape as the casting size and shape in the sand box. Use expandable methyl methacrylate and styrene copolymer resin beads to convert the expandable The proportion of methyl acrylate and styrene copolymer resin beads is injected into the steam foaming machine at a ratio of 85%: 15% for foam molding;

[0022] S2. Combination: Combine and bond the molded foam model and the pouring riser model to form an engine block model cluster;

[0023] S3. Coating. The model clusters are coated with special paint by immersion method. The coated model clusters are dried by air drying equipment at 50℃, and the coating thickness is controlled at 2mm, according to the size of the engine block casting Thickness control to make the lost foam model;

[0024] S4. Forming. Put the lost foam model into the sand box to fill ...

Embodiment 2

[0030] A process for improving the yield rate of lost foam casting engine cylinders includes the following steps:

[0031] S1. Molding. Install a foamed plastic mold with the same size and shape as the casting size and shape in the sand box. Use expandable methyl methacrylate and styrene copolymer resin beads to convert the expandable The proportion of methyl acrylate and styrene copolymer resin beads is injected into the steam foaming machine at a ratio of 90%: 10% for foam molding;

[0032] S2. Combination: Combine and bond the molded foam model and the pouring riser model to form an engine block model cluster;

[0033] S3. Coating. The model clusters are coated with special paint by immersion method. The coated model clusters are dried by air drying equipment at 45℃. The coating thickness is controlled at 1.8mm, according to the size of the engine block casting Carry out thickness control to make the lost foam model;

[0034] S4. Forming. Put the lost foam model into the sand box ...

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PUM

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Abstract

The invention discloses a process for improving a full mold casting engine cylinder yield. The process comprises such steps as mode production, combination, coating, molding, shaping, casting, taking and detection. The process for improving the full mold casting engine cylinder yield adopts a foam model produced by expandable methyl methacrylate and styrene copolymerized resin beads to improve the casting yield, uses a sealing film and a vacuum pump for vacuum air extraction of a sand box to form negative pressure, increases viscosity between dry sand, guarantees uniform feeding of casting liquid, facilitates gas elimination, and improves the casting integrity; after the mold casting is finished, a vacuum air extraction device continuously extracts air to maintain 200-300 s vacuum, so that the casting stability and the casting molding yield are guaranteed to realize the advantages of reasonable matching, simple operation process and high reliability; and the process is higher in innovativeness, practicability and utilization value.

Description

Technical field [0001] The invention relates to the technical field of casting, in particular to a process for improving the yield of lost foam casting engine cylinders. Background technique [0002] Lost foam casting is a solid casting of foam plastic molds using dry sand without binder and vacuum technology. It combines foam models similar in size and shape to the castings to form clusters, brushed with refractory paint and dried, and then buried in Vibration modeling in dry quartz sand, pouring under negative pressure to vaporize the model, liquid metal occupying the position of the model, solidification and cooling to form a new casting method, compared with traditional casting technology, lost foam casting has the following characteristics, casting quality Good, low cost, unlimited material, suitable for size, size, high precision, smooth surface, reduced cleaning, saving machine, greatly reduced internal defects, compact organization, large-scale and mass production, automa...

Claims

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Application Information

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IPC IPC(8): B22C9/04
CPCB22C9/04
Inventor 王承标董晓光满鹏徐忠雨张印
Owner ANHUI QUANCHAI TIANHE MACHINERY
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