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Lost foam casting method of casing of full-automatic lock for container

A lost foam casting, fully automatic technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low safety factor, resource waste, shell mold damage, etc., to improve product quality, reduce resource consumption, The effect of reducing impurities

Inactive Publication Date: 2012-03-07
WUXI KAIJIE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the process that investment casting has many and complex procedures, is not suitable for mechanized production, has high labor intensity in mold making, low production efficiency, pollutes the environment, dry sand cannot be reused, and needs to be roasted to consume fuel. Waste, high production cost, and the shell mold is prone to defects. During pouring, it will run out of fire, impurities are easy to mix, the roasting temperature is difficult to control, the shell mold is often artificially damaged, manual pouring is labor-intensive, and the safety factor is low. The high residual strength of the shell mold requires a special shell removal process, etc.
The main reason for the unfavorable process is that the shell needs to be repeated to achieve a sufficient thickness to withstand the high temperature and pouring impact during the pouring process, and the shell mold must be roasted, etc.

Method used

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  • Lost foam casting method of casing of full-automatic lock for container
  • Lost foam casting method of casing of full-automatic lock for container
  • Lost foam casting method of casing of full-automatic lock for container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Use EPS foamed plastic pellets specially used for lost foam casting with a diameter of φ0.2mm. The EPS foamed material is XJ501 produced by Wuxi Xingda Foam Plastic New Material Co., Ltd.

[0042] 2. Use a pre-foaming machine with a foaming multiple of 38 for pre-foaming, and the foaming diameter is controlled within the range of 23-25 ​​grams / 500ml. The preheating temperature of the system is about 100°C. The preheating time is suitable for the temperature of the barrel of the hand-feeling foaming machine to be uniform. The steam pressure of the incoming steam is controlled between 0.2 and 0.3 MPa, and the cycle time is 1.7 minutes.

[0043] 3. Mature the pre-foamed foamed beads in the curing chamber for 8 hours, the ambient temperature is 25-30°C, the ventilation is good, and the humidity in the air is controlled below 40%.

[0044] 4. Inject the foamed beads into the mold with compressed air of about 0.6 MPa, expand the white mold through steam expansion again, pa...

Embodiment 2

[0060] 1. Use EPS foamed plastic pellets with a diameter of 0.3mm for lost foam casting.

[0061] 2. Use a pre-foaming machine with a foaming multiple of 50 for pre-foaming, and the foaming diameter is controlled within the range of 25-28 grams / 500ml. The preheating temperature of the system is about 120°C, the preheating time is suitable for the temperature of the barrel of the hand-feeling foaming machine to be uniform, the steam pressure of the incoming steam is controlled between 0.2-0.3MPa, and the cycle time is 1.7 minutes.

[0062] 3. Mature the pre-foamed foamed beads in the curing chamber for 15 hours, the ambient temperature is 25-30°C, the ventilation is good, and the humidity in the air is controlled below 40%.

[0063] 4. Use 0.65 MPa compressed air to inject the foamed beads into the mold, expand the steam again, pass water to cool the white mold, and then use compressed air to blow the white mold out of the mold. The steam pressure is between 0.2 and 0.3 MPa. ...

Embodiment 3

[0079] 1. Use EPS foamed plastic pellets specially used for lost foam casting with a diameter of φ0.4mm.

[0080] 2. Use a pre-foaming machine with a foaming multiple of 60 for pre-foaming, and the foaming diameter is controlled within the range of 24-26 grams / 500ml. The preheating temperature of the system is about 110°C. The preheating time is suitable for the temperature of the barrel of the hand-feeling foaming machine to be uniform. The steam pressure of the incoming steam is controlled between 0.2 and 0.3 MPa, and the cycle time is 1.7 minutes.

[0081] 3. Mature the pre-foamed foamed beads in the curing chamber for 24 hours, the ambient temperature is 25-30°C, the ventilation is good, and the humidity in the air is controlled below 40%.

[0082] 4. Use 0.7MPa compressed air to inject the foamed beads into the mould, expand again with steam, cool with water to form the white mold, and then use compressed air to blow the white mold out of the mould. The steam pressure is...

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Abstract

The invention discloses a lost foam casting method of a casing of a full-automatic lock for a container. The lost foam casting method comprises the following steps of preparing a casting-shaped model from a foaming material, building a model cluster, putting the model cluster into a sandbox, carrying out vibration molding by binder-free dry sand, carrying out improvement on strength of the binder-free dry sand filling a cavity by vacuum negative pressure so that the binder-free dry sand has enough strength, carrying melting and pouring, taking out a casting from the binder-free dry sand without residual strength, carrying out normalizing, and then carrying out shot blast to obtain finished products. Through the lost foam casting method, a foam gas generation amount can be centralizedly controlled by a vacuum system; a casting is easy to be taken out from a sandbox; modeling sand can be recycled; multiple processes of production are suitable for mechanized production; paint use amounts can be controlled according to product conditions; and a total production cost can be reduced.

Description

[0001] technical field [0002] The invention relates to a casting method, in particular to a lost foam casting method for a fully automatic lock casing for a container. Background technique [0003] The fully automatic lock for containers adopts upper and lower lock shell structures, and its material is cast steel. The existing processing method has always adopted the investment casting process. The production process of the investment casting process is shown in figure 1 , The feature of this process is to use the principle of heating and melting wax to make a wax mold first, then make a sand shell mold, then remelt the wax to obtain a cavity, and then roast and pour to obtain a casting. It can be seen from the process that investment casting has many and complicated procedures, is not suitable for mechanized production, has high labor intensity in mold making, low production efficiency, pollutes the environment, dry sand cannot be reused, and needs to be roasted to cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 蒋明
Owner WUXI KAIJIE CASTING
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