CN103014392B - Hard alloy extrusion forming agent, preparation method thereof and application of hard alloy extrusion forming agent in extrusion production - Google Patents
Hard alloy extrusion forming agent, preparation method thereof and application of hard alloy extrusion forming agent in extrusion production Download PDFInfo
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- CN103014392B CN103014392B CN201210579450.1A CN201210579450A CN103014392B CN 103014392 B CN103014392 B CN 103014392B CN 201210579450 A CN201210579450 A CN 201210579450A CN 103014392 B CN103014392 B CN 103014392B
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Abstract
The invention discloses a hard alloy extrusion forming agent, a preparation method thereof, and application of the hard alloy extrusion forming agent in extrusion production. The hard alloy extrusion forming agent comprises the following components in percentage by weight: 60 to 85 percent of a solvent namely ethylene glycol diacetate, 10 to 30 percent of a bonding agent namely ethyl cellulose and 5 to 10 percent of a surface active agent namely fatty alcohol-polyoxyethylene ether. The preparation method of the hard alloy extrusion forming agent comprises the steps of blending, mixing, heating and stirring materials. The application of the hard alloy extrusion forming agent in extrusion production of a hard alloy comprises the following steps of: blending materials, and performing ball milling on 0.8 to 3.0 weight percent of a plasticizer namely polyethylene glycol stearate and the balance of a hard alloy raw material; drying and granulating to obtain a mixture containing the plasticizer; mixing 5 to 7 weight percent of a forming agent with the mixture to obtain an extrusion feeding material; extruding a blank; drying to remove the solvent in the forming agent; curing the blank, and fixing the length of the blank through semi-finishing to form a semi-finished product; and sintering to obtain a finished product. By adopting the hard alloy extrusion forming agent, the qualified rate and labor efficiency of a product are improved, the cost is reduced, the localization, safety and environmental friendliness of raw materials are achieved, and the operating environment is improved.
Description
Technical field
The present invention relates to powder metallurgy forming technology, exactly, relate to a kind of Wimet extrusion production forming agent and preparation method thereof and the application in extrusion production.
Background technology
Powder Extrusion Molding (PEM) is a kind of new technology growing up on the extrusion technique basis of metal strand and high polymer processing.Extrusion molding is to be compressed by loose body of powder, then drawn rheology and moulding is one of field that in CEMENTED CARBIDE PRODUCTION, technology content is very high.Extrusion molding can be produced equal section and the unrestricted abnormal member of length, aspect Wimet print needle, miniature twist drill for printed circuit board drilling, bar with internal screw cooling fluid hole, has the moulding advantage can not be substituted.
Powder mixture extrusion process need adopt the auxiliary agent of binding agent and other kind, forming agent could be realized smoothly and extruding.Extrusion molding agent is the gordian technique of extruding, and the kind of forming agent and performance quality, determined the even quality of the finished product of extrusion process and production control.Grasp to such an extent that producer is few preferably to extrusion molding agent technology in the world at present, and extrusion technique is blocked very serious.
In published patent, the high patent SE0950086(2010 of Sweden three) what adopt is 30 ~ 60% polyene+40 ~ 70% wax+2.5 ~ 10% Dormant oils; And Chinese patent CN178888A(2004) what adopt is 60 ~ 85% paraffin+10 ~ 30% superpolymer+1 ~ 5% activators; What CN10137255A(2008) adopt is 65 ~ 80% paraffin+10 ~ 20% styrene-butadiene rubber(SBR)+3 ~ 5% dibutyl phthalate (DBP)+3 ~ 5% rapeseed oil+3 ~ % stearic acid.These patents all paraffin be main, paraffin makes Wimet extrusion process large to the susceptibility of temperature, bar easily cracked in when dewaxing especially big rod, first-time qualification rate is low.And in above patent, not containing high boiling solvent, can not at lower temperature, carry out air-dry and heat drying, thereby can not partly process easily fixed length, can only after pre-burning, could partly process, carry out difficulty to product control carbon ribbon, increase production cost.So there is the problems such as efficiency is low, conforming product rate is low, production cost is high.Chinese patent CN1847348A(2006) adopt part naphthane+0.01 ~ 0.4,6 ~ 10 parts of ethyl cellulose+3 ~ 7 part oleic acid, although eliminated paraffin, and adopt high boiling solvent naphthane, can realize easily half processing fixed length, conforming product rate is increased to 70%.But the component that does not play plastification in formula, squeeze pressure is large, and material easily oxidation is difficult to preserve, and cannot realize production in enormous quantities.Naphthane evaporation rate in goods is fast, easily causes goods to crack in drying process.Naphthane does not have domestic commodity, and the expensive and supply of import price affects production schedule.Naphthane has moderate toxicity, damages worker health safety.Naphthane has corrodibility to rubber seal.
Summary of the invention
The object of the present invention is to provide a kind of Wimet extrusion molding agent and preparation thereof and the application in extrusion production, can improve conforming product rate and efficiency, reduce costs, can realize again localization of raw material and safety and environmental protection, improve operating environment.
Wimet extrusion molding agent of the present invention, its composition and mass percent are: glycol diacetate 60%～85%, ethyl cellulose 10%～30%, fatty alcohol-polyoxyethylene ether 5%～10%.
The mass percent of described glycol diacetate, ethyl cellulose, fatty alcohol-polyoxyethylene ether is preferably 65%～80%, and 12%～29%, 6%～8%.
Described glycol diacetate and fatty alcohol-polyoxyethylene ether are liquid, and ethyl cellulose is solid.
The present invention is with low toxicity type solvent ethylene glycol diacetate esters (rat oral LD5
06.86g/kg) replace moderate toxicity solvent naphthane (LD
501.62g/kg), can improve Working environment, relatively safety and environmental protection; Replace acid reagent oleic acid with neutral nonionogenic tenside fatty alcohol-polyoxyethylene ether, can avoid the impact of carboxyl on Wimet in oleic acid, improve the quality of products; Replace paraffin as softening agent with polyethylene glycol stearate, polyethylene glycol stearate is dissolvable in water raw spirit, is applicable to doing with raw spirit the ultra-fine cemented carbide of wet grinding media, reduces oxygen level and squeeze pressure, puies forward heavy alloyed metallographic structure homogeneity; Adopt extrusion molding agent of the present invention, effectively avoid extruded product to crack in drying process.Extruded rod product does not need pre-burning process can carry out half processing fixed length through drying process, can enhance productivity and save energy.The present invention is raw materials used is all domestic ripe commodity, inexpensive, easily purchase, and can effectively reduce costs and ensure regular supply.
Brief description of the drawings
Fig. 1 is that the present invention is from preparing the schema of Wimet extrusion molding agent, compound and the application Wimet extrusion production.
In figure, each mark represents:
The solvent of extrusion molding agent (glycol diacetate) 2. the caking agent of extrusion molding agent (ethyl cellulose) 3. the tensio-active agent of extrusion molding agent (fatty alcohol-polyoxyethylene ether) 4. softening agent (polyethylene glycol stearate) 5. the carbide alloy mixture 8. of extrusion molding agent 6. hard alloy material powder 7. plasticizer-containings push feeding 9. extrusion blank 10. Wimet work in-process 11. hard alloy finished product.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Wimet extrusion molding agent of the present invention, its composition and mass percent are: solvent 1---60%～85%, binding agent 2---10%～30%, tensio-active agent 3---5%～10%.As preferably, the mass percent of solvent, binding agent, tensio-active agent is 65%～80%, 12%～29%, 6%～8%.
Solvent, binding agent, tensio-active agent are respectively glycol diacetate, ethyl cellulose, fatty alcohol-polyoxyethylene ether.Wherein: glycol diacetate and fatty alcohol-polyoxyethylene ether are liquid, ethyl cellulose and polyethylene glycol stearate are solid.
As shown in Figure 1, first prepare burden: solvent, binding agent, tensio-active agent are pressed to proportion ingredient;
thenabove-mentioned raw materials is added in stirring in water bath device and mixed; Be heated to 30 DEG C～90 DEG C and stir 0.5h～3.0h, prepare Wimet extrusion molding agent of the present invention.
The application of this Wimet extrusion molding agent in Wimet extrusion production is:
1. batching, the softening agent that is 0.8%～3.0% by mass percent---the hard alloy material of polyethylene glycol stearate solid and surplus, directly drops in the ball milling bucket that contains abrading-ball and wet grinding media and mixes;
2. ball milling, makes softening agent and hard alloy material form the ball milling slip of homogeneous;
3. be dried, ball milling slip obtained to the compound of plasticizer-containing through vacuum or spray-drying process;
4. together with the carbide alloy mixture of the Wimet extrusion molding agent that is 5%～7% by mass percent and plasticizer-containing, drop in mixing tank and mix, make extruding feeding;
5. extruding feeding is dropped into extrusion machine and extrude blank;
6. dry, the solvent in Wimet extrusion molding agent is removed in volatilization;
7. blank solidifies and carries out half processing fixed length, forms Wimet work in-process;
8. sintering obtains hard alloy finished product.
Extrusion molding agent of the present invention has improved Working environment, relatively safety and environmental protection, and raw materials used be all domestic ripe commodity, inexpensive, easily purchase, can effectively reduce costs and ensure regular supply.
The present invention has avoided the impact of carboxyl on Wimet in oleic acid, improves the quality of products; And be applicable to doing with raw spirit the ultra-fine cemented carbide of wet grinding media, reduce oxygen level and squeeze pressure, put forward heavy alloyed metallographic structure homogeneity; Adopt extrusion molding agent of the present invention, also effectively avoid extruded product to crack in drying process.Squeezing product does not need pre-burning process can carry out half processing fixed length through drying process, can enhance productivity and save energy.
Claims (3)
1. a Wimet extrusion molding agent, its composition and mass percent are: glycol diacetate 60%～85%, ethyl cellulose 10%～30%, fatty alcohol-polyoxyethylene ether 5%～10%.
2. Wimet extrusion molding agent according to claim 1, the mass percent that it is characterized in that described glycol diacetate, ethyl cellulose, fatty alcohol-polyoxyethylene ether is 65%～80%, 12%～29%, 6%～8%.
3. Wimet extrusion molding agent according to claim 1, is characterized in that described glycol diacetate and fatty alcohol-polyoxyethylene ether are liquid, and ethyl cellulose is solid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579450.1A CN103014392B (en) | 2012-12-27 | 2012-12-27 | Hard alloy extrusion forming agent, preparation method thereof and application of hard alloy extrusion forming agent in extrusion production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579450.1A CN103014392B (en) | 2012-12-27 | 2012-12-27 | Hard alloy extrusion forming agent, preparation method thereof and application of hard alloy extrusion forming agent in extrusion production |
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| CN103014392A CN103014392A (en) | 2013-04-03 |
| CN103014392B true CN103014392B (en) | 2014-11-05 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532040B (en) * | 2014-12-11 | 2016-05-04 | 株洲西迪硬质合金科技股份有限公司 | A kind of carbide alloy composite forming method |
| CN105499557A (en) * | 2016-01-28 | 2016-04-20 | 河南中硬合金有限公司 | Hard alloy large-product holding-up hammer multi-component forming agent and preparation method |
| CN106756403A (en) * | 2016-12-09 | 2017-05-31 | 大连圣洁真空技术开发有限公司开发区分公司 | A kind of accurate combination broach processing technology |
| CN106735240B (en) * | 2016-12-23 | 2019-12-24 | 株洲硬质合金集团有限公司 | Preparation method of PCB bar |
| CN106853522B (en) * | 2016-12-26 | 2019-04-30 | 南昌硬质合金有限责任公司 | A kind of hard alloy squeezes the preparation method of feeding |
| CN107737920B (en) * | 2017-10-25 | 2020-01-14 | 浙江德威硬质合金制造有限公司 | Extrusion method for producing hard alloy bar |
| CN109014178B (en) * | 2018-08-31 | 2020-08-04 | 晋城鸿刃科技有限公司 | Hard alloy extrusion forming preparation method |
| CN111922333A (en) * | 2020-07-26 | 2020-11-13 | 自贡硬质合金有限责任公司 | Hard alloy mixture dispersing agent |
| CN114603132A (en) * | 2022-03-11 | 2022-06-10 | 温州宏丰合金有限公司 | Hard alloy extrusion molding agent, hard alloy extrusion feed and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788889A (en) * | 2004-12-13 | 2006-06-21 | 上海材料研究所 | Extrusion molding agent and its uses in sintered carbide extrusion process |
| CN1788888A (en) * | 2005-12-22 | 2006-06-21 | 株洲钻石切削刀具股份有限公司 | Plasticizer for carbide alloy production |
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- 2012-12-27 CN CN201210579450.1A patent/CN103014392B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1788889A (en) * | 2004-12-13 | 2006-06-21 | 上海材料研究所 | Extrusion molding agent and its uses in sintered carbide extrusion process |
| CN1788888A (en) * | 2005-12-22 | 2006-06-21 | 株洲钻石切削刀具股份有限公司 | Plasticizer for carbide alloy production |
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| CN103014392A (en) | 2013-04-03 |
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