CN102728837B - 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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- CN102728837B CN102728837B CN201110087316.5A CN201110087316A CN102728837B CN 102728837 B CN102728837 B CN 102728837B CN 201110087316 A CN201110087316 A CN 201110087316A CN 102728837 B CN102728837 B CN 102728837B
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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, easily get rid of extrusion molding agent.
Background technology
At present, 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 technique contains a certain amount of finish composition, make shaping after blank intensity and plasticity lower, the eliminating of later process forming agent difficulty.Mostly carbide alloy extruded product manufacturing enterprise based on paraffin technology is, by long-time dry and uniform temperature, the pre-burning of time, prevent blank to ftracture and make blank have certain intensity, meeting the requirement of blank cutting processing.The problem brought like this is that the extruded product production cycle is long, and due to blank easy to crack and cause product percent of pass not high.
Summary of the invention
The object of the present invention is to provide a kind of high-ductility, easily 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 as follows:
A kind of high-ductility, easily get rid of extrusion molding agent, formulated by following raw materials according by weight percentage: polyvinyl butyral resin (PVB) 10-20%, BC (butyl) 60-70%, coconut oil (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, for white particle sprills, relative density 1.08 ~ 1.10, water insoluble, dissolve in the organic solvents such as alcohols, ester class, ketone, softening temperature 60 DEG C ~ 75 DEG C, 100 DEG C there is thermal decomposition, almost decompose completely 200 DEG C ~ 240 DEG C time.
The effect of BC (butyl) is solvent, plasticising, can with water arbitrarily than miscible, be dissolved in ethanol, ether, oils and other organic solvents many, boiling point 230.4 DEG C.
The effect of coconut oil and dibutyl phthalate is surfactant, reduces surface tension, promotes forming agent soaking at particle surface.
The effect of paraffin (58#) is plasticizer, helps shaping.
After adopting such scheme, compared with the conventional method, superiority of the present invention is:
(1) introduce high polymer cemented constituent element PVB first, polyvinyl butyral resin is applied to extrusion molding agent technique, give the goodish intensity of pressed compact and plasticity, and the intensity that realization makes blank reach certain in the low temperature drying stage; In addition, PVB and various conventional plasticising constituent element can mix, and can burn completely in sintering process clean, ash content is lower simultaneously;
(2) reduce wax content, avoid paraffin to the destruction of blank intensity, and shorten degreasing time;
(3) suitably quantity of solvent is controlled, by the vacuum drying under low temperature, most solvent can be discharged at drying stage, shorten the production cycle, avoid the violent discharge of pre-burning (or sintering) stage solvent to the adverse effect of product material;
(4) solvent is after drying stage is got rid of, and because the main component of forming agent residual in excellent base is a small amount of high polymer constituent element PVB, excellent base has very high intensity, can realize the direct cutting correction of the flank shape of dry rear excellent base;
(5) introducing of high polymer constituent element PVB, expection can realize by vacuumizing for a long time under low temperature (20-110 DEG C) accurate temperature controlling, get rid of liquid molding agent (solvent, surfactant), shorten (or saving) and dry in the shade the time; By the intensity of high polymer constituent element retention bar base, realize dried direct cutting correction of the flank shape, save pre-burning direct sintering, simplify operation.
In a word, the present invention introduces high polymer constituent element " polyvinyl butyral resin-PVB " with solvent " BC " as extrusion molding agent.By the introducing of high polymer constituent element " polyvinyl butyral resin-PVB ", give the goodish intensity of pressed compact and plasticity; Solvent " BC " boiling point is low, can vacuumize quick discharge at a lower temperature.Therefore, by reasonable set drying process, the time of the drying of adjustment blank and pre-burning, reach and ensureing, under the prerequisite that alloy mass is stable, to improve product percent of pass and the object shortening the extruded product production cycle.
Below in conjunction with specific embodiment, the invention will be further described.
Detailed description of the invention
Preferred embodiment of the present invention.
Below list the forming agent of different ratio of the present invention, and use this forming agent carbide alloy to extrude the implementation result produced.
Wherein: polyvinyl butyral resin (PVB) is bonding constituent element, and play skeletal support effect, the intensity of its content to pressed compact plays a major role.BC (butyl) is solvent, and content is higher, and the plasticity of excellent base is general better.Coconut oil and dibutyl phthalate are all surfactants, effectively can promote forming agent soaking at particle surface, promote the Homogeneous phase mixing of material.Paraffin can tie up shape again can plasticising, but too high levels is unfavorable to removing of forming agent.
The bar using PVB forming agent to extrude its dry in the shade the time compared with paraffin technology forming agent bar, time average LVFS is 56%.Qualification rate is roughly the same.The life cycle of the product of wax moulding agent technique and PVB forming agent rod base that following table lists the several frequently seen sized products of the YG10X trade mark contrasts.
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Claims (1)
1. high-ductility, easily get rid of an 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%.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN102728837A CN102728837A (en) | 2012-10-17 |
| CN102728837B true 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
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| 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 | Method for manufacturing dentate special-shaped ceramic components by injection molding |
| CN101701311A (en) * | 2009-09-29 | 2010-05-05 | 武汉科技大学 | WCoB ternary boride cermet material and preparation method thereof |
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| CN102728837A (en) | 2012-10-17 |
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