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Method for manufacturing microarray through powder microinjection molding

A microarray and microinjection technology, which is applied in the field of powder microinjection molding based on water-soluble binder system and microarray preparation, can solve the problems of high production cost, difficult to process micro parts, and restrict mass production, etc., and achieve low cost , dense surface finish, and the effect of improving degreasing efficiency

Inactive Publication Date: 2015-01-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, LIGA, silicon etching and micro-casting technologies are limited by the processing materials, and are not suitable for forming ceramic micro-parts, and LIGA and silicon etching technologies are difficult to process micro-parts with complex three-dimensional shapes. On the other hand, the production cost is high. restrict mass production

Method used

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  • Method for manufacturing microarray through powder microinjection molding
  • Method for manufacturing microarray through powder microinjection molding
  • Method for manufacturing microarray through powder microinjection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the powder is selected from 316L stainless steel powder, and the average particle diameter of 316L stainless steel powder is d 50 =0.6μm, the organic binder is composed of a water-insoluble binder, a water-soluble binder and a surfactant, and the water-insoluble binder is polyethylene and polymethyl methacrylate, with polyethylene glycol as Water-soluble binder, with stearic acid as surfactant.

[0025] The method steps of manufacturing microarray by powder microinjection molding are as follows,

[0026] (1) Mixing powder and binder system: Add 2000g 316L stainless steel powder and 67g polymethyl methacrylate, 78g polyethylene glycol, 67g polyethylene and 11g stearic acid into a twin-roller mixer and mix at 160°C for 1 hour, then cooling and crushing to obtain the mixture;

[0027] (2) Injection molding

[0028] The obtained mixture is injected into a prefabricated body on an injection molding machine, and the shape of the green body is as follows...

Embodiment 2

[0035] In this embodiment, the powder is made of zirconia ceramic powder, and the average particle size of zirconia powder is d 50 =80nm, the organic binder is composed of a water-insoluble binder, a water-soluble binder and a surfactant, and the water-insoluble binder is ethylene-vinyl acetate and polymethyl methacrylate, polyethylene Alcohol is a water-soluble binder, stearic acid is used as a surfactant,

[0036] The method steps of manufacturing microarray by powder microinjection molding are as follows,

[0037] (1) Mixing powder and binder system: 2000g zirconia ceramic powder and 89g polymethyl methacrylate, 89g polyethylene glycol, 104g ethylene-vinyl acetate and 15g stearic acid were added to the double-roller mixer Mixed at 160°C for 1 hour, then cooled and crushed to obtain a mixture;

[0038] (2) Injection molding

[0039] The obtained mixture is injected into a prefabricated body on an injection molding machine, and the shape of the green body is as follows: ...

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Abstract

The invention discloses a method for manufacturing a microarray through powder microinjection molding, belongs to the field of powder microinjection molding, and discloses a preparation method of the microarray through the powder microinjection molding by using a water debinding characteristic adhesive feed. The feed is prepared by using a metal / ceramic powder and an adhesive, a preform is prepared by using a powder microinjection molding technology, and then the microarray is prepared through debinding and sintering. The method comprises the following specific preparation steps: uniformly mixing selected metal / ceramic powder and a water soluble adhesive in a mixer or a screw extruder according a proportion for 1-2 hours; pelletizing and then forming the preform through injection molding; performing water debinding and thermal debinding; placing a debinding ring in a tubular sintering furnace to sinter to obtain a compact metal / ceramic microarray. The preparation method has the advantages of high water debinding speed, environmental friendliness, capability of forming the micron-sized metal / ceramic microarray, no deformation and high dimensional accuracy.

Description

technical field [0001] The invention belongs to the technical field of powder micro-injection molding, and relates to a powder micro-injection molding method based on a water-soluble binder system, which realizes low-cost, high-precision and environment-friendly microarray preparation. Background technique [0002] Driven by the vigorous development of microsystem technology, the preparation of micro-parts, that is, parts with external dimensions or local dimensions in the micron level, and parts with dimensional accuracy in the micron level, has become a hot spot in the field of advanced manufacturing research in recent years. [0003] At present, the methods for preparing micro parts mainly include LIGA (lithography, electroplating and casting), silicon etching technology, micro casting and powder micro injection molding methods. On the one hand, LIGA, silicon etching and micro-casting technologies are limited by the processing materials, and are not suitable for forming c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115
Inventor 刘琳何振宇
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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