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Grinding material for precision casting

A technology of precision casting and molding materials, which is applied in the direction of casting and molding equipment, etc., can solve the problems of large shrinkage, inappropriateness, and low strength, and achieve the effects of low linear shrinkage, good reusability, and high cost performance

Active Publication Date: 2007-07-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold material has low strength and large shrinkage rate (about 1.2%). It is mainly used for jewelry investment casting, and is not suitable for the mold material requirements of large thin-walled complex integral precision casting structural parts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] Embodiment: (below all represent by weight percentage)

[0032] experiment method

[0033] The following test methods are common methods for testing investment casting mold materials used in the examples.

[0034] Dropping melting point GB / T8036

[0035] Softening point GB / T4507

[0036] Penetration GB / T4985

[0037] Kinematic viscosity GB / T265

[0038] Bending strength GB / T14235.2

[0039] Linear shrinkage GB / T14235.4

[0040] Ash GB / T508

[0041] The preparation of the precision casting mold materials in the examples 1, 2, 3, 4, and 5 of the present invention is to add raw materials in sequence at a temperature of about 110-130°C and mix and melt them into a uniform and transparent wax liquid. Cool and shape.

Embodiment 6

[0042] Embodiment 6 is an imported precision casting mold material.

Embodiment 1

[0044] 80 # Microcrystalline wax, dropping point 82.4°C (Nanchong Oil Refinery) 20%

[0045] 58 # Fully refined paraffin wax, melting point 58.2°C (Fushun Petroleum No. 1 Plant) 20%

[0046] Polymerized rosin, ring and ball softening point 100°C (Wuzhou Arakawa Chemical Co., Ltd.) 10%

[0047] Petroleum resin, softening point 100°C (Nanjing Yangzi Eastman Chemical Co., Ltd.) 40%

[0048] High-pressure polyethylene, average molecular weight 22000 (Fushun Petrochemical Company) 4%

[0049] Canaba wax, drop melting point 80 ℃ (Brazil MOACIR COSTA company) 6%

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Abstract

The invention relates to a precise casting mold material, which comprises: petroleum wax, petroleum resin, high polymer, mineral wax and animal-plant wax. This product has high bending strength, superficial hardness, small linear shrinkage and ash, and well other properties, overcomes opposite in prior art, and fits to manufacture large-scale thin-wall integral fine-casting structure part.

Description

technical field [0001] The invention relates to a precision casting mold material, which is especially suitable for making wax models in the precision casting process of large thin-wall integral precision casting structural parts and other precision castings. Background technique [0002] With the development of equipment manufacturing technology, many important parts adopt large-scale thin-walled complex integral precision-cast structural parts. Due to the large size, high precision requirements, complex shape and thin wall of large-scale thin-walled complex integral precision-cast structural parts, the mold The material has higher requirements: higher strength, less shrinkage, and good fluidity. Existing high-strength and low-shrinkage precision casting mold materials, such as: the investment casting mold materials introduced by patents such as US 5518537, US 6326429, and US 6485553, all adopt the method of adding fillers to increase strength and reduce shrinkage, such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/02B22C7/00
Inventor 杨光李尚勇李莉
Owner CHINA PETROLEUM & CHEM CORP
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