CN102728837A - High-plasticity and easy-to-be-eliminated extrusion molding agent - Google Patents
High-plasticity and easy-to-be-eliminated extrusion molding agent Download PDFInfo
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- CN102728837A CN102728837A CN2011100873165A CN201110087316A CN102728837A CN 102728837 A CN102728837 A CN 102728837A CN 2011100873165 A CN2011100873165 A CN 2011100873165A CN 201110087316 A CN201110087316 A CN 201110087316A CN 102728837 A CN102728837 A CN 102728837A
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Abstract
The invention discloses a high-plasticity and easy-to-be-eliminated extrusion molding agent. The extrusion molding agent is prepared by the following raw materials, by weight: polyvinyl butyral 10-20%, butylcarbitol (diethylene glycol monobutyl ether) 60-70%, cocinic acid (yituomin) 1-5%, DBP (dibutyl phthalate) 1-5% and paraffin 10-15%. The extrusion molding agent provided in the invention provides a pressed shape with a fairly good strength and plasticity. With the extrusion molding agent provided in the invention, qualified rate of products is improved and production period of the extrusion products is shortened.
Description
Technical field
The present invention relates to a kind of high-ductility, be prone to get rid of extrusion molding agent.
Background technology
At present, the carbide alloy extrusion molding agent mainly adopts paraffin (containing solvent) process system.Because the viscosity of paraffin itself is lower, and paraffin (containing solvent) extrusion molding agent technology contains a certain amount of finish composition, makes that blank intensity and the plasticity after the moulding is lower, and the eliminating of later process forming agent is difficult.With paraffin technology is mostly master's carbide alloy extruded product manufacturing enterprise is to prevent the blank cracking and make blank have certain intensity through long-time drying and uniform temperature, the pre-burning of time, satisfies the requirement of blank cutting processing.The problem of bringing like this is that the extruded product production cycle is long, and causes product percent of pass not high owing to blank is easy to crack.
Summary of the invention
The object of the present invention is to provide a kind of high-ductility, be prone to get rid of extrusion molding agent, make pressed compact have goodish intensity and plasticity, improve product percent of pass and shorten the extruded product production cycle.
To achieve these goals, technical scheme of the present invention is following:
A kind of high-ductility, the easy extrusion molding agent of getting rid of; Formulated by following raw materials according by weight percentage: polyvinyl butyral resin (PVB) 10-20%; BC (diethylene glycol butyl ether) 60-70%; Coconut oil (the second holder is quick) 1-5%, DBP (dibutyl phthalate) 1-5%, paraffin 10-15%.
Wherein, the effect of polyvinyl butyral resin (PVB) is bonding, support frame, is the white particle sprills; Relative density 1.08～1.10; Water insoluble, dissolve in the organic solvents such as alcohols, ester class, ketone 60 ℃～75 ℃ of softening temperatures; 100 ℃ thermal decomposition take place, in the time of 200 ℃～240 ℃, almost completely decompose.
The effect of BC (diethylene glycol butyl ether) is solvent, plasticising, can with water arbitrarily than miscible, be dissolved in ethanol, ether, oils and many other organic solvents, 230.4 ℃ of boiling points.
The effect of coconut oil and dibutyl phthalate is a surfactant, reduces surface tension, and the promotion forming agent is wetting particle surface.
The effect of paraffin (58#) is a plasticizer, helps moulding.
After adopting such scheme, compare with existing method, superiority of the present invention is:
(1) introduces high polymer cemented constituent element PVB first, polyvinyl butyral resin is applied to extrusion molding agent technology, give goodish intensity of pressed compact and plasticity, and be implemented in the low temperature drying stage and make blank reach certain intensity; In addition, PVB and various plasticising constituent element commonly used can mix, and simultaneously can completing combustion in sintering process clean, ash content be lower;
(2) reduce wax content, avoid the destruction of paraffin, and shorten degreasing time blank intensity;
(3) suitably control quantity of solvent,, make most solvent can discharge, shorten the production cycle, avoid the adverse effect of the violent discharge of pre-burning (perhaps sintering) stage solvent the product material at drying stage through the vacuum drying under the low temperature;
(4) after solvent was got rid of through drying stage, because the main component of residual forming agent is a spot of high polymer constituent element PVB in the excellent base, excellent base had very high intensity, can realize the direct cutting correction of the flank shape of the excellent base in dry back;
(5) introducing of high polymer constituent element PVB, expection can realize through vacuumizing for a long time under low temperature (20-110 ℃) accurate temperature controlling, get rid of liquid molding agent (solvent, surfactant), shorten (or saving) and dry in the shade the time; Keep the intensity of excellent base through the high polymer constituent element, realize dried direct cutting correction of the flank shape, save the pre-burning direct sintering, simplify working process.
In a word, the present invention introduces high polymer constituent element " polyvinyl butyral resin-PVB " and solvent " BC " as extrusion molding agent.Through the introducing of high polymer constituent element " polyvinyl butyral resin-PVB ", give goodish intensity of pressed compact and plasticity; Solvent " BC " boiling point is low, can under lower temperature, vacuumize quick discharge.Therefore, through reasonable setting drying process, the dry time with pre-burning of adjustment blank, reach and guaranteeing to improve the purpose of product percent of pass and shortening extruded product production cycle under the stable prerequisite of alloy mass.
Below in conjunction with specific embodiment the present invention is described further.
The specific embodiment
Preferred embodiment of the present invention.
Below listed the forming agent of the different proportionings of the present invention, and the implementation result that uses this forming agent carbide alloy extrusion production.
Wherein: polyvinyl butyral resin (PVB) plays the skeleton supporting role for the bonding constituent element, and its content plays a major role to the intensity of pressed compact.BC (diethylene glycol butyl ether) is a solvent, and content is high more, and the plasticity of excellent base is generally good more.Coconut oil and dibutyl phthalate all are surfactants, can effectively promote forming agent wetting at particle surface, promote the even mixing of material.Paraffin can be tieed up shape again can plasticising, but too high levels is unfavorable to removing of forming agent.
Its time of drying in the shade of bar of using the PVB forming agent to extrude is compared with paraffin technological forming agent bar, and the time average LVFS is 56%.Qualification rate is roughly suitable.Following table has been listed the wax moulding agent technology of the several frequently seen size product of the YG10X trade mark and the life cycle of the product contrast of PVB forming agent rod base.
Claims (1)
- A high-ductility, be prone to get rid of extrusion molding agent, it is characterized in that formulated by following raw materials according by weight percentage: polyvinyl butyral resin 10-20%, BC 60-70%, coconut oil 1-5%, DBP1-5%, paraffin 10-15%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110087316.5A CN102728837B (en) | 2011-04-06 | 2011-04-06 | High-plasticity and easy-to-be-eliminated extrusion molding agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110087316.5A CN102728837B (en) | 2011-04-06 | 2011-04-06 | High-plasticity and easy-to-be-eliminated extrusion molding agent |
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| CN102728837A true CN102728837A (en) | 2012-10-17 |
| CN102728837B CN102728837B (en) | 2015-05-06 |
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| CN201110087316.5A Active CN102728837B (en) | 2011-04-06 | 2011-04-06 | High-plasticity and easy-to-be-eliminated extrusion molding agent |
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2011
- 2011-04-06 CN CN201110087316.5A patent/CN102728837B/en active Active
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| GB1377344A (en) * | 1973-07-10 | 1974-12-11 | Wilson J M | Fastener driving tool with sound deadening features |
| EP1029895B1 (en) * | 1999-02-16 | 2007-07-18 | Corus Technology BV | Composition containing a binder for a PIM-Process |
| JP3861556B2 (en) * | 2000-03-24 | 2006-12-20 | セイコーエプソン株式会社 | Method for producing sintered body and sintered body |
| CN101134242A (en) * | 2007-10-17 | 2008-03-05 | 中南大学 | A kind of preparation method of cemented carbide indexable special-shaped insert |
| CN101372556A (en) * | 2008-10-15 | 2009-02-25 | 济南市冶金科学研究所 | Cemented carbide extrusion molding adhesive and preparation thereof |
| CN101643360A (en) * | 2009-09-02 | 2010-02-10 | 清华大学 | A method for manufacturing tooth-shaped special-shaped ceramic parts by injection molding |
| CN101701311A (en) * | 2009-09-29 | 2010-05-05 | 武汉科技大学 | A kind of WCoB ternary boride cermet material and preparation method thereof |
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