Metal, ceramic powder and polymer mixture used for manufacturing metal and ceramic products and method for hydrolyzing and removing polymer from moldings

A technology of powder and ceramics, which is applied in the fields of ceramic powder mixtures, polymer materials and metals. It can solve the problems of environmental hazards, waste of resources, and waste, and achieve the effects of low removal temperature, short time, and reduced product costs.

Inactive Publication Date: 2014-09-24
JIANGSU TIANYI ULTRA FINE METAL POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As far as the current popular wax-based and formaldehyde-based binder systems are concerned, it is impossible to recycle the removed polymer materials
When the wax-based binder is removed, even if it is recovered, the recovered composition cannot be recycled, and sometimes it is even discharged in a straight line; whether the polyoxymethylene system is continuously thermally removed or acid-catalyzed The premise is to depolymerize formaldehyde into gaseous formaldehyde, and then burn the formaldehyde, which not only wastes resources,...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Create iron-based items. The material material is a mixture of carbonyl iron powder and hydrolytic decomposition of the main polymer material system. The carbonyl iron powder with a volume ratio of 59%, the combined volume of the polymer material system is 41% (of which: 90% caprolactam, 7% low-density polyethylene, 3% polyisobutylamine). First, the carbonyl iron powder with a volume ratio of 59% of the mixture, low-density polyethylene with a mass ratio of 7% in the polymer material system, and 3% polyisobutylamine are pre-mixed in a mixer for 1 hour, and then mixed in a kneader. Knead at 130°C for 1 hour; then evenly put caprolactam with a combined mass ratio of 90% in the polymer material system, knead at 100°C for 1 hour, transfer the material to an internal mixer and knead at 110°C for 0.5 hours to obtain a blend; then Transfer the mixture into the extruder, extrude, dry, and granulate; the green product is obtained by injection molding with the injection machine;...

Embodiment 2

[0027] Manufacture of stainless steel products. Material material 316L stainless steel powder and hydrolytic decomposition of the main polymer material system combination mixture. 316L stainless steel powder with a volume ratio of 63%, the combined volume of the polymer material system accounts for 37% (of which: 92% polybutylene terephthalate, 5% polypropylene, and 3% polyisobutylene); 316L stainless steel powder with a volume ratio of 63%, and a polymer material system with a mass ratio of 5% polypropylene and 3% polyisobutylene, pre-mixed in a mixer for 1 hour, kneaded in a kneader at 220 ° C for 1 hour; Put it into the polymer material system and combine the mass ratio of 92% polybutylene terephthalate, knead at 180°C for 1 hour, transfer the material to an internal mixer and knead at 185°C for 1 hour to obtain a blend; The mixture is transferred to the extruder, extruded, dried, and granulated; the green product is obtained by injection molding of the injection machine; ...

Embodiment 3

[0029] Manufacture ceramic products. The material material is a mixture of alumina powder and a polymer material system that has been hydrolyzed to remove the main components. Alumina powder with a volume ratio of 58%, the combined volume of the polymer material system accounts for 42% (of which: 2-pyrrolidone with a mass ratio of 89%, 8% low-density polyethylene, 3% polyisobutylene, and 58% of the material Materials Alumina powder, 8% low-density polyethylene and 3% polyisobutylene are pre-mixed in a mixer for 1 hour, put into a kneader and kneaded at 220°C for 1 hour; The polymer material system combines 2-pyrrolidone with a mass ratio of 89%, kneads at room temperature for 1 hour, and transfers the material to an internal mixer for 0.5 hours at 85°C to obtain a blend; then transfer the blend to an extruder , extruded, granulated, and dried; the green product was obtained by injection molding with an injection machine; the green product was put into a hydrolysis removal fur...

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PUM

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Abstract

The invention discloses a polymer material, metal and ceramic powder mixture used for manufacturing metal, ceramic and compound (mixed) material (material component) products and a method for hydrolyzing and removing polymer materials from moldings. The mixture comprises the following materials in volume ratio: 40-70% of material components and 60-30% of polymer material adhesives (being composed of the following materials in mass ratio: 50-95% of main materials that can be hydrolyzed and removed at a relatively low temperature, 46-4.5% of ancillary materials that can be thermally removed at a relatively high temperature and 4-0.5% of additives); the mixture is used for molding by mixing, banburying, squeezing and granulating; main polymer materials are hydrolyzed and removed from molded green bodies at a relatively low temperature, auxiliary polymer materials and additives are thermally removed at a relatively high temperature, and the green bodies are sintered to obtain target products. The polymer material and the method have the advantages that adhesive removing is low in temperature and short in time, and the catalyst is water; removed materials are reusable by recycling, condensing and separating, and are environment-friendly; after molding, pouring gate and flow passage rejecting materials can be repeatedly recycled; the product cost is lowered.

Description

technical field [0001] The invention relates to a polymer material, metal and ceramic powder mixture for manufacturing metal, ceramic and composite material products. The mixture is suitable for powder injection molding (compression molding, mold casting), and the molded product is hydrolyzed to remove polymer materials to obtain metal, ceramic and composite material products. Background technique [0002] Powder injection molding is a new near-net-shaping manufacturing technology compared to traditional manufacturing methods, and is especially suitable for manufacturing micro-sized, complex structural shapes, and high-volume products. [0003] The research and development of powder injection molding technology at home and abroad has a history of more than 20 years, and some binder systems composed of polymer materials and their corresponding removal methods and equipment have been formed. For example: the wax-based bonding system and its removal technology and equipment th...

Claims

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Application Information

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IPC IPC(8): B22F3/22C04B35/638
Inventor 高为鑫韩奎戴静
Owner JIANGSU TIANYI ULTRA FINE METAL POWDER
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