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Precisive ornament casting moulding material

A technology of precision casting and mold material, applied in the field of mold material for precision casting of jewelry, can solve the problems of poor reusability, poor fluidity, and inability to meet the requirements of low cost, and achieve good reusability and low line Shrinkage rate, dimensional stability effect

Active Publication Date: 2010-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of fillers, its fluidity becomes poor, and its reusability is not good, so it cannot meet the low-cost requirements of the current investment casting market competition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Embodiment: (below all represent by weight percentage)

[0034] experiment method

[0035] The following test methods are common methods for testing investment casting mold materials used in the examples.

[0036] Dropping melting point GB / T 8036

[0037] Softening point GB / T 4507

[0038] Penetration GB / T 4985

[0039] Kinematic viscosity GB / T 265

[0040] Bending strength GB / T 14235.2

[0041] Linear shrinkage GB / T 14235.4

[0042] Ash GB / T 508

Embodiment 1

[0045] 85 # Hydrogenated microcrystalline wax, dropping point 85.1°C (Fushun Petrochemical Research Institute) 25%

[0046] 58 # Semi-refined paraffin wax, melting point 58.2°C (Fushun Petroleum No. 1 Plant) 20%

[0047] Petroleum resin, softening point 100°C (Shanghai Jinsen Petroleum Resin Company) 45%

[0048] High-pressure polyethylene, average molecular weight 22000 (Fushun Ethylene Chemical Factory) 4%

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

Embodiment 2

[0051] 80 # Hydrogenated microcrystalline wax, dropping point 80.8°C (Fushun Petrochemical Research Institute) 20%

[0052] 58 # Fully refined paraffin wax, melting point 58.2°C (Fushun Petroleum No. 1 Plant) 20%

[0053] Polymerized rosin, ring and ball softening point 100°C (Wuzhou Arakawa Chemical Co., Ltd.) 10%

[0054] Petroleum resin, softening point 100°C (Nanjing Yangzi Eastman Chemical Co., Ltd.) 40%

[0055]EVA (melt index 28, DuPont, USA) and high pressure polyethylene (average molecular weight 22000, Fushun Ethylene Chemical Plant) weight ratio 1: 1 6%

[0056] Sichuan wax, drop melting point 72°C (Cangzhou Forest Wax Industry Co., Ltd.) 4%

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Abstract

A precision-casting mold material for ornament consists of hydrogenated microcrystalline wax, paraffin, petroleum resin, high-molecular polymer, mineral wax and animal and vegetable wax. It has better bending strength, surface hardness, thermal stability, fluidity, reutilization and less linear shrinkage rate. It can be used for gold and silver ornaments.

Description

technical field [0001] The invention relates to a mold material for precision casting of ornaments, which is especially suitable for the mold material for making models in the precision casting of gold and silver ornaments and other ornaments. Background technique [0002] With the development of the national economy and the improvement of people's living standards, the development of the jewelry industry is showing great vitality. There are more and more styles and styles, and the shapes are becoming more and more complex. Higher requirements are put forward for mold materials: high strength, shrinkage Small, good fluidity, good toughness, etc. Existing molding materials for precision casting of jewelry, such as: the superfine molding material for jewelry investment casting introduced by CN00119620.0 patent, with paraffin wax, other waxes, modified rosin resin, high molecular polymer and cosolvent as main components, The strength is high, but the shrinkage rate is large (a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06B22C7/02
Inventor 杨光李莉
Owner CHINA PETROLEUM & CHEM CORP
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