CN103920881A - Easy-removal binder for powder injection molding - Google Patents
Easy-removal binder for powder injection molding Download PDFInfo
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- CN103920881A CN103920881A CN201410143461.4A CN201410143461A CN103920881A CN 103920881 A CN103920881 A CN 103920881A CN 201410143461 A CN201410143461 A CN 201410143461A CN 103920881 A CN103920881 A CN 103920881A
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- easy
- powder injection
- binding agent
- powder
- naphthalene
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Abstract
The invention discloses an easy-removal binder for powder injection molding and belongs to the technical field of powder metallurgy. The easy-removal binder is formed by raw materials including, by weight, 45-75% of naphthalene, 20-50% of thermoplastic resin and 1-10% of surfactants. The easy-removal binder adopting the naphthalene, the thermoplastic resin and the surfactants has the advantages that few and simple types of the raw materials are adopted, so that the easy-removal binder is applicable to both metal and ceramic powder, the raw materials are low in cost and easy to obtain, the naphthalene is easy to remove, and good environmental conservation can be achieved.
Description
Technical field
The invention belongs to powder metallurgical technology, be specifically related to a kind of powder injection forming binding agent that is easy to remove.
Background technology
Powder injection forming (english abbreviation is that the English full name of PIM < is: Powder Injection Molding >) technology have workpiece, the workpiece size precision of the complicated shape that once can be shaped high, without machining and be easy to realize the strong points such as high-efficiency automatic production, thereby the extremely favor of industry.It is plastic shaping and the powder sintered forming technique combining, and by organic binder bond, evenly mixes with metal (pottery) powder, by mold injects, is shaped and is obtained injection molded blank, and injection molded blank, through degreasing, sintering, obtains near-net-shape workpiece.Aforesaid organic binder bond plays the effect for metal dust (metallurgical powder) mobility, and organic binder bond is broadly divided into following a few class: the one, and water-soluble binder; The 2nd, paraffinic base binding agent; The 3rd, mould based binder.Water-soluble binder is generally used for being difficult for the metallurgical powder react with water, and its removal methods is injection moulding workpiece is soaked in water and to use and remove water-soluble constituent element; Paraffinic base binding agent adopts paraffin and high poly-composition, conventionally first by organic solvent, removes the paraffin in injection member, then removes high polymer constituent element by the method for thermal decomposition.Although it is comparatively extensive that paraffinic base binding agent is applied in power injection molding, exist organic solvent to have the thickness of injury, injection moulding workpiece to be restricted to human body, because thickness is thicker, the time that removes is longer and production efficiency is restricted; Mould based binder and take polyformaldehyde as major components, take polyethylene or polypropylene as skeleton constituent element, injection member first removes polyformaldehyde by red fuming nitric acid (RFNA), and skeleton constituent element removes in follow-up heating process.Mould based binder and water-soluble binder and paraffinic base binder phase comparatively speaking, there is the workpiece that removal efficiency is high and applicable forming thickness is larger.But it is large to mould based binder equipment investment, and pyrolysis product is poisonous, especially because China lacks desirable independent intellectual property right to moulding based binder, thereby can only be at high price to buying the feeding preparing abroad.
In disclosed Chinese patent literature, can be seen in the technical information with binding agent about powder injection forming, " preparation method of catalysis degreasing type adhesive for powder injection moulding and feeding thereof " who typically recommends as invention patent mandate notification number CN101353561B.The degreasing type adhesive of mentioning due to this patent belongs to aforementioned and moulds based binder category, thereby has aforesaid corresponding shortcoming." powder injection forming and micro-powder injection molding adhesive special and preparation method thereof " that and for example application for a patent for invention publication No. CN102719080A provides, the binding agent of mentioning due to this patent application scheme is aforesaid water-soluble binder, thereby there is aforesaid deficiency, and dusty material is had to fastidious property, water for example for iron powder or iron alloy powder, can not use, because can cause iron powder and ferroalloy powder to get rusty.
For above-mentioned prior art situation, the applicant has done positive and useful exploration, and has formed technical scheme described below.
Summary of the invention
Task of the present invention is to provide a kind of, environmental protection cheap and easy to get to the strong adaptability of dusty material, raw material and the high powder injection forming binding agent that is easy to remove of removal efficiency.
Task of the present invention completes like this, a kind of powder injection forming binding agent that is easy to remove, and it is that raw material by following quality % number forms:
Naphthalene 45-75%;
Thermoplastic resin 20-50%;
Surfactant 1-10%.
In a specific embodiment of the present invention, described thermoplastic resin is polypropylene.
In another specific embodiment of the present invention, described polypropylene is isotactic polypropylene, random polypropylene or syndiotactic polypropylene.
In another specific embodiment of the present invention, described surfactant is stearic acid and ester derivative thereof.
In another specific embodiment of the present invention, described stearic acid and ester derivative thereof are stearic acid, butyl stearate or octyl stearate.
Technical scheme provided by the invention is owing to having adopted naphthalene, surfactant and thermoplastic resin to form powder injection forming binding agent, thereby the raw materials used kind of filling a prescription is few and simple, to metal and ceramic powders, all can be suitable for, and raw material is cheap and easy to get, and be easy to naphthalene be removed and have the good feature of environmental protection.
The specific embodiment
Embodiment 1:
Naphthalene 45%;
Isotactic polypropylene 50%;
Stearic acid 5%.
Embodiment 2:
Naphthalene 75%;
Random polypropylene 24%;
Butyl stearate 1%.
Embodiment 3:
Naphthalene 60%;
Syndiotactic polypropylene 30%;
Stearic acid 10%.
Embodiment 4:
Naphthalene 50%;
Isotactic polypropylene 42%;
Octyl stearate 8%.
The powder injection forming being obtained by embodiments of the invention 1 to 4 both can be used for the injection moulding of metal dust with binding agent, also can be used for the injection moulding to ceramic powders, and the naphthalene constituent element in formula remove temperature low (45-60 ℃ of left and right), there is energy-conservation effect.
Claims (5)
1. be easy to the powder injection forming binding agent removing, it is characterized in that it is that raw material by following quality % number forms:
Naphthalene 45-75%;
Thermoplastic resin 20-50%;
Surfactant 1-10%.
2. the powder injection forming binding agent that is easy to remove according to claim 1, is characterized in that described thermoplastic resin is polypropylene.
3. the powder injection forming binding agent that is easy to remove according to claim 2, is characterized in that described polypropylene is isotactic polypropylene, random polypropylene or syndiotactic polypropylene.
4. the powder injection forming binding agent that is easy to remove according to claim 1, is characterized in that described surfactant is stearic acid and ester derivative thereof.
5. the powder injection forming binding agent that is easy to remove according to claim 4, is characterized in that described stearic acid and ester derivative thereof are stearic acid, butyl stearate or octyl stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143461.4A CN103920881A (en) | 2014-04-11 | 2014-04-11 | Easy-removal binder for powder injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143461.4A CN103920881A (en) | 2014-04-11 | 2014-04-11 | Easy-removal binder for powder injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103920881A true CN103920881A (en) | 2014-07-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410143461.4A Pending CN103920881A (en) | 2014-04-11 | 2014-04-11 | Easy-removal binder for powder injection molding |
Country Status (1)
| Country | Link |
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| CN (1) | CN103920881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108568522A (en) * | 2018-04-27 | 2018-09-25 | 安徽省瀚海新材料股份有限公司 | A kind of method neodymium iron boron superfine powder recycling and efficiently utilized |
| CN110216278A (en) * | 2019-06-25 | 2019-09-10 | 明阳科技（苏州）股份有限公司 | A kind of high fluidity, lower shrinkage are than feeding and preparation method thereof |
| CN111545758A (en) * | 2020-06-19 | 2020-08-18 | 深圳市泛海统联精密制造股份有限公司 | Novel 316L feed for low-temperature powder injection molding and preparation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4765950A (en) * | 1987-10-07 | 1988-08-23 | Risi Industries, Inc. | Process for fabricating parts from particulate material |
| US20090129961A1 (en) * | 2007-11-15 | 2009-05-21 | Viper Technologies Llc, D.B.A. Thortex, Inc. | Metal injection molding methods and feedstocks |
| CN101623760A (en) * | 2009-07-24 | 2010-01-13 | 厦门理工学院 | Application of micro injection molding technique for preparing tungsten-base alloy product and micro injection molding method of tungsten-base alloy powder |
| CN103266319A (en) * | 2013-05-21 | 2013-08-28 | 李建久 | Method for preparing porous titanium coating on surface of titanium alloy |
-
2014
- 2014-04-11 CN CN201410143461.4A patent/CN103920881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4765950A (en) * | 1987-10-07 | 1988-08-23 | Risi Industries, Inc. | Process for fabricating parts from particulate material |
| US20090129961A1 (en) * | 2007-11-15 | 2009-05-21 | Viper Technologies Llc, D.B.A. Thortex, Inc. | Metal injection molding methods and feedstocks |
| CN101623760A (en) * | 2009-07-24 | 2010-01-13 | 厦门理工学院 | Application of micro injection molding technique for preparing tungsten-base alloy product and micro injection molding method of tungsten-base alloy powder |
| CN103266319A (en) * | 2013-05-21 | 2013-08-28 | 李建久 | Method for preparing porous titanium coating on surface of titanium alloy |
Non-Patent Citations (1)
| Title |
|---|
| ERIC NYBERG 等: ""Microstructure and mechanical properties of titannium components fabricated by a new powder injection molding technique"", 《MATERIALS SCIENCE AND ENGINEERING C》, 31 December 2005 (2005-12-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108568522A (en) * | 2018-04-27 | 2018-09-25 | 安徽省瀚海新材料股份有限公司 | A kind of method neodymium iron boron superfine powder recycling and efficiently utilized |
| CN110216278A (en) * | 2019-06-25 | 2019-09-10 | 明阳科技（苏州）股份有限公司 | A kind of high fluidity, lower shrinkage are than feeding and preparation method thereof |
| CN111545758A (en) * | 2020-06-19 | 2020-08-18 | 深圳市泛海统联精密制造股份有限公司 | Novel 316L feed for low-temperature powder injection molding and preparation process |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140716 |