CN101037579A - Adhesive for powder injection forming and preparation method thereof - Google Patents
Adhesive for powder injection forming and preparation method thereof Download PDFInfo
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- CN101037579A CN101037579A CN 200610031343 CN200610031343A CN101037579A CN 101037579 A CN101037579 A CN 101037579A CN 200610031343 CN200610031343 CN 200610031343 CN 200610031343 A CN200610031343 A CN 200610031343A CN 101037579 A CN101037579 A CN 101037579A
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Abstract
The invention discloses an adhesive for powder injection molding and preparing method thereof. The adhesive is prepared by mixing paraffin, high-density polyethylene, ethylene acetate copolymer, and modified dibutylphthalate in mixing machine. Compared with existent technique, due to employing low cost and nontoxic raw material, the preparing method can reduce cost, protect environment and simplify preparation technique. The low molecule component paraffin with good fluidity can effectively reduce feeding viscosity of metal powder injection molding, and increases mold filling property. High molecular polymers acts as framework to maintain shape of blank in following degrease course. Additive of the modified dibutylphthalate conduces to fully mixing of powder and metal, reducing defects such as powder conglobation and aperture, and increasing mechanics property of final product.
Description
Technical field the invention belongs to chemical field, relates to a kind of powder injection-molded binding agent.
Background technology has good flowability to fill complicated mold cavity for making metal-powder in powder injection-molded production process, prepare the product of even structure, excellent property, must add the binding agent of certain volume than (30%～60%).Binding agent generally is to form by several compounds are mixed, can be in moulding process as metal-powder mobile carrier, increase the flowability of metal-powder, help to fill complicated mold cavity, high molecular polymer wherein can play the effect of skeleton, to keep the degreasing conformality, minor amounts of additives can increase lubricated and dispersed in powder injection-molded process, helps to obtain the goods of excellent property even structure.
The binding agent that often adopts has paraffin series at present, paraffin-polymer system, polymer-paraffin wax system, polymer system, but water-soluble polymeric system and catalytic decomposition polymer system.These binding agents all can be at specific system, increase powder flowbility and mold filling performance to a certain extent, but the effect on the homogeneity of feeding is remarkable inadequately, microscopic appearance is observed and is found to exist defectives such as hole, space and powder agglomeration therebetween, these defectives can not be eliminated in follow-up complete processing, will influence the performance of material.
Summary of the invention
The objective of the invention is at above-mentioned deficiency, provide a kind of and can effectively reduce feeding viscosity, obtain the binding agent of even microtexture.This binding agent can be applicable in tungsten base, the iron-based powder injection molding production, its formed precision height, and the product structure is good, excellent property.
A kind of adhesive for powder injection forming is by mixed composition of dibutyl phthalate of paraffin, high density polyethylene(HDPE), ethene acetate multipolymer and process modification.The volume percent content of described each component configuration is as follows:
Paraffin (PW): 71～78vol%, high density polyethylene(HDPE) (HDPE): 10～12vol%, ethene acetate multipolymer (EVA): 10～12vol%, modification dibutyl phthalate: 2～5vol%.
The preparation method of described adhesive for powder injection forming, mainly comprise: mixed in mixing roll after each component of binding agent is disposed according to volume percent, mixed time: 100～150min, mix temperature: 135～165 ℃, mixed speed: 40～55r/min.
The present invention compared with prior art owing to adopt low-cost avirulent starting material, can reduce cost, protect environment, and preparation technology is simple.Wherein low molecule group member paraffin has good flowability, can effectively reduce the feeding viscosity of metal powder injection molding, improves the mold filling performance.High molecular polymer (high density polyethylene(HDPE) and ethene acetate multipolymer) can play the effect of skeleton, in skimming processes subsequently, after low molecule paraffin removes, still can keep the shape of blank.Additive agent modified dibutyl phthalate helps the fully mixed of powder and metal, reduces defectives such as powder agglomeration and hole, helps to improve the mechanical property of the finished product.Low molecule paraffin and high molecular polymer can play good interaction, obtain uniform injection molding feeding, improve feeding in degreasing sintered later mechanical property.
Adopt the present invention can give full play to powder injection-molded effect, overcome the higher characteristics of conventional powder injection molding cost, enlarge its range of application, will create bigger economic benefit and social benefit.
Embodiment
Embodiment 1: with volume percent is 10% ethene acetate multipolymer, 10% high density polyethylene(HDPE), and 78% paraffin and 2% modification dibutyl phthalate are mixed in mixing roll.Its mix temperature is 150 ℃, and mixed churning time is 120min, and mixed stir speed (S.S.) is 47r/min, and the dope of the melting state that obtains is binding agent of the present invention.
Embodiment 2: with volume percent is 12% ethene acetate multipolymer, 8% high density polyethylene(HDPE), and 78% paraffin and 2% modification dibutyl phthalate are mixed in mixing roll.Its mix temperature is 150 ℃, and mixed churning time is 120min, and mixed stir speed (S.S.) is 47r/min, and the dope of the melting state that obtains is binding agent of the present invention.
Embodiment 3: with volume percent is 8% ethene acetate multipolymer, 12% high density polyethylene(HDPE), and 78% paraffin and 2% modification dibutyl phthalate are mixed in mixing roll.Its mix temperature is 150 ℃, and mixed churning time is 120min, and mixed stir speed (S.S.) is 47r/min, and the dope of the melting state that obtains is binding agent of the present invention.
Embodiment 4: with volume percent is 12% ethene acetate multipolymer, 12% high density polyethylene(HDPE), and 71% paraffin and 5% modification dibutyl phthalate are mixed in mixing roll.Its mix temperature is 150 ℃, and mixed churning time is 120min, and mixed stir speed (S.S.) is 47r/min, and the dope of the melting state that obtains is binding agent of the present invention.
Claims (2)
1. adhesive for powder injection forming, it is characterized in that: by mixed composition of dibutyl phthalate of paraffin, high density polyethylene(HDPE), ethene acetate multipolymer and process modification, each component volume percent is as follows: paraffin: 71～78vol%, high density polyethylene(HDPE): 10～12vol%, ethene acetate multipolymer: 10～12vol%, modification dibutyl phthalate: 2～5vol%.
2. the preparation method of adhesive for powder injection forming, it is characterized in that: mixed in mixing roll after each component of binding agent is disposed according to volume percent, mixed time: 100～150min, mix temperature: 135～165 ℃, mixed speed: 40～55r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610031343 CN101037579A (en) | 2006-03-14 | 2006-03-14 | Adhesive for powder injection forming and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610031343 CN101037579A (en) | 2006-03-14 | 2006-03-14 | Adhesive for powder injection forming and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101037579A true CN101037579A (en) | 2007-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610031343 Pending CN101037579A (en) | 2006-03-14 | 2006-03-14 | Adhesive for powder injection forming and preparation method thereof |
Country Status (1)
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| CN (1) | CN101037579A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264518B (en) * | 2007-03-15 | 2010-12-29 | 精工爱普生株式会社 | Sintered body and method for producing the same |
| CN102881909A (en) * | 2011-07-13 | 2013-01-16 | 北京林业大学 | Defluorination carbon electrode and its preparation method |
| CN104227003A (en) * | 2014-09-01 | 2014-12-24 | 东莞劲胜精密组件股份有限公司 | Preparation method of powder injection molded feeding material |
| CN104559840A (en) * | 2014-11-27 | 2015-04-29 | 东莞劲胜精密组件股份有限公司 | Adhesive for powder injection forming and application method thereof |
| CN105364079A (en) * | 2008-12-15 | 2016-03-02 | 罗伯特·博世有限公司 | Method for producing an ester and binder system |
| CN105499584A (en) * | 2014-08-07 | 2016-04-20 | 纳米及先进材料研发院有限公司 | Feedstock formulation and supercritical debinding process for micro-powder injection moulding |
| CN106270522A (en) * | 2016-09-23 | 2017-01-04 | 江西悦安超细金属有限公司 | A kind of for metal injection molded feeding and preparation method thereof |
| CN106424704A (en) * | 2016-09-22 | 2017-02-22 | 东莞华晶粉末冶金有限公司 | Formula system for low-shrinkage-rate stainless steel powder injection molding feedstock and formula system for molding agent thereof |
| CN109249557A (en) * | 2017-07-13 | 2019-01-22 | 深圳市富优驰科技有限公司 | A kind of technique that addition macromolecule increases MIM feeding cycle life |
| CN110078497A (en) * | 2019-03-14 | 2019-08-02 | 湖北精圭锆业有限公司 | Black zirconia feeding and preparation method thereof for ceramic injection forming |
| CN110436945A (en) * | 2018-05-04 | 2019-11-12 | 柯马杜股份有限公司 | Adhesive for injection molding composition |
-
2006
- 2006-03-14 CN CN 200610031343 patent/CN101037579A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264518B (en) * | 2007-03-15 | 2010-12-29 | 精工爱普生株式会社 | Sintered body and method for producing the same |
| CN105364079B (en) * | 2008-12-15 | 2018-11-09 | 罗伯特·博世有限公司 | Prepare the method and binder system of ester |
| CN105364079A (en) * | 2008-12-15 | 2016-03-02 | 罗伯特·博世有限公司 | Method for producing an ester and binder system |
| CN102881909B (en) * | 2011-07-13 | 2015-02-04 | 北京林业大学 | Defluorination carbon electrode and its preparation method |
| CN102881909A (en) * | 2011-07-13 | 2013-01-16 | 北京林业大学 | Defluorination carbon electrode and its preparation method |
| CN105499584A (en) * | 2014-08-07 | 2016-04-20 | 纳米及先进材料研发院有限公司 | Feedstock formulation and supercritical debinding process for micro-powder injection moulding |
| CN104227003B (en) * | 2014-09-01 | 2015-09-30 | 东莞劲胜精密组件股份有限公司 | The preparation method of Feedstock of Powder Injection Molding |
| CN104227003A (en) * | 2014-09-01 | 2014-12-24 | 东莞劲胜精密组件股份有限公司 | Preparation method of powder injection molded feeding material |
| CN104559840A (en) * | 2014-11-27 | 2015-04-29 | 东莞劲胜精密组件股份有限公司 | Adhesive for powder injection forming and application method thereof |
| CN106424704A (en) * | 2016-09-22 | 2017-02-22 | 东莞华晶粉末冶金有限公司 | Formula system for low-shrinkage-rate stainless steel powder injection molding feedstock and formula system for molding agent thereof |
| CN106270522A (en) * | 2016-09-23 | 2017-01-04 | 江西悦安超细金属有限公司 | A kind of for metal injection molded feeding and preparation method thereof |
| CN109249557A (en) * | 2017-07-13 | 2019-01-22 | 深圳市富优驰科技有限公司 | A kind of technique that addition macromolecule increases MIM feeding cycle life |
| CN110436945A (en) * | 2018-05-04 | 2019-11-12 | 柯马杜股份有限公司 | Adhesive for injection molding composition |
| CN110078497A (en) * | 2019-03-14 | 2019-08-02 | 湖北精圭锆业有限公司 | Black zirconia feeding and preparation method thereof for ceramic injection forming |
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