Lost foam casting method of twist lock shell for containers

A lost foam casting and container technology, which is applied to casting molding equipment, molds, mold components, etc., can solve the problems of high labor intensity, waste of resources, and low safety factor in mold making, so as to improve labor productivity and reduce resource consumption. , the effect of improving product quality

Inactive Publication Date: 2012-02-29
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 twist lock shell for containers
  • Lost foam casting method of twist lock shell for containers
  • Lost foam casting method of twist lock shell for containers

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 0.2-0.3MPa, and the cycle time is 1.5 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 40-45%.

[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, pass...

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 20-23 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 1.5 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 45-50%.

[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 20-23 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 0.2-0.3MPa, and the cycle time is 1.5 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 40-50%.

[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 b...

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Abstract

The invention discloses a lost foam casting method of a twist lock shell for containers, comprising the following steps of: firstly making a foaming material into a casting shape, forming a die cluster, putting into a sandbox and using binder-free sand for vibrating compaction, making the dry sand for filling a cavity to possess enough strength by the utilization of vacuum negative pressure, melting and pouring, taking out the cast from the modeling sand without residual strength, normalizing, and carrying out shot peening treatment to obtain the finished product. According to the invention, gas forming amount can be processed in a vacuum system; the cast is easy to take out from the sandbox; the modeling sand is repeatedly usable; a plurality of links during the production process are suitable for mechanized production; the application amount of a paint can be controlled according to the case of the product; and the total production cost can be reduced.

Description

[0001] Technical field [0002] The present invention involves a casting method, which is specifically a disappearing mold casting method for a container with a twist lock lock. Background technique [0003] The container uses the upper and lower lock -locking structure with a twist lock lock. Its material is cast steel. The existing processing method has always adopted the molten mold casting process.For the production process of the melting model casting process figure 1 The characteristic of this process is to use the principle of heating of wax materials to form a wax mold first, then make a sand -type shell mold, and then re -integrate the wax material to get the cavity, and then roast it to get the casting.It can be seen from the process that there are many procedures for melting model casting, complex, not suitable for mechanized production, large -scale labor intensity, low production efficiency, pollution of the environment, reused sand, and fuel that requires baking con...

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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