CN1140362C - Low melting point powder material for laser sintering fast forming precisely casting wax mold - Google Patents
Low melting point powder material for laser sintering fast forming precisely casting wax mold Download PDFInfo
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- CN1140362C CN1140362C CNB011191554A CN01119155A CN1140362C CN 1140362 C CN1140362 C CN 1140362C CN B011191554 A CNB011191554 A CN B011191554A CN 01119155 A CN01119155 A CN 01119155A CN 1140362 C CN1140362 C CN 1140362C
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Abstract
The present invention relates to a powder material with a low melting point, which is used for rapidly forming precise-casting wax moulds in a laser sintering mode. A surfactant and a demoulding agent are added to wax powder made from organic granular materials to carry out the surface treatment; a light absorbing agent, a viscosity reducer, an antistatic agent, a reinforcing and toughening agent and a filling material are added to the wax powder made from organic granular materials to carry out the modification. The made powder material with a low melting point has the advantages of favorable sintering performance, favorable formability, good quality of formed components, easy demoulding, favorable adaptability to a precise-casting technique, etc. The powder material with a low melting point is favorable for rapidly forming precise-casting wax moulds in a laser sintering mode.
Description
The invention belongs to the field with the laser beam processing parts, relate to the laser sintering rapid forming method of hot investment casting wax-pattern, more particularly, is dusty material and the preparation technology thereof that a kind of laser sintering and moulding precisely casting wax mold is used.
Use the method for hot investment casting and can make complex-shaped foundry goods, the surface quality of continuous castings of formation is good, dimensional accuracy is high, so hot investment casting has been used to produce the parts with irregular contour and internal structure complexity in a large number.Smart casting needs to make earlier wax-pattern, generally is to produce wax-pattern with the method for compacting.At first make the metal die (pressing mold) of compacting usefulness, the wax with the semi-molten attitude injects pressing mold then, takes out after cooling, promptly obtains the wax-pattern of smart casting usefulness.The metal die that the compacting wax-pattern is used is because complex-shaped, difficulty of processing is big, particularly in the trial production of new products process, because design will be improved repeatedly, product finally could be finalized the design, and therefore compacting usually also will be revised with metal die, the cycle lengthening that will make model change like this, the cost of product strengthens, the competitive market that very difficult adaptation is growing more intense." rapid shaping technique " that grew up both at home and abroad in recent years adapts to the strong instrument of this requirement of market competition just.Rapid shaping technique is a kind of discrete/accumulation forming method that cad technique, Numeric Control Technology, laser processing technology and material new technology etc. are integrated.Specifically, laser sintering rapid prototyping technology mainly is made up of following steps: (1) sets up the 3D solid cad model of wanting processing parts in computer, carry out slicing treatment with delamination software then, obtain the information of each processing aspect, and be translated into the work of signal of telecommunication control laser scanning system; (2) on the shaping work platform, lay the fine and close powder for molding material uniformly of one deck, laser beam scans sintering according to the slicing layer surface information to the powder for molding material under computer control, the powder smelting that is shone by laser beam also bonds together in cooling process subsequently, finishes the processing of first aspect; (3) successively spread powder, successively scan sintering, adopt the above-mentioned stack method of forming, produce Three-dimensional Entity Components at last.
At present, existing more than ten kind of quick shaping process wherein selected laser sintered (SLS) technology, because the moulding material range of choice is wide, so have very wide application, just is being subjected to increasing attention.CN1100020A disclosed " variable length line scanning and quick automatic forming method and device " is to have the deficiency that influences edge of work sintering quality at existing point scanning laser sintering method, and the improvement of making.Though this invention has overcome the slow shortcoming of same device speed of production,, still conventional raw material for used powder for molding, the technological requirement that can not adapt to precisely casting wax mold, it is not good to exist sintering character, demoulding difficulty, need to decompose and remove, shortcoming such as pollute with firing method.
Purpose of the present invention is exactly in order to overcome the shortcoming of prior art, a kind of low melting point powder material manufacturing process of laser sintering fast forming precisely casting wax mold is provided, it is good to make it have sintering character, the Forming Quality height, essence is cast adaptable advantage, help to realize the laser sintering rapid forming of precisely casting wax mold.
The present invention is achieved through the following technical solutions its purpose, a kind of low melting point powder material manufacturing process of laser sintering fast forming precisely casting wax mold, it is in the wax powder that utilizes organic pellet to make, to add: surfactant, releasing agent, light absorber, thinner, antistatic agent, strengthen flexibilizer and organic and inorganic filler, its content is: add in organic pellet of per 1 kilogram of preparation wax powder: surfactant 1-10 gram, releasing agent 1-5 gram, light absorber 0.1-5 gram, thinner 0.5-20 gram, antistatic agent 0.1-2 gram, strengthen flexibilizer 1-10 gram, filler 5-30 gram, its preparation process comprises:
(1) wax powder preparation: adopt chemical synthesis or mechanical cryogenic freezing comminuting method.
Chemical synthesis: described organic pellet is added to stirring and dissolving in the chlorinated hydrocarbon solution, adds the precipitating reagent post precipitation and filter, oven dry, screening make the wax powder;
Machinery cryogenic freezing comminuting method: described organic pellet is cooled to-60 ℃-150 ℃ in the cold temperature freezing equipment of low temperature, pulverizes processing, screening makes the wax powder;
(2) surface treatment: above-mentioned wax powder is put into mixer, add vaporific surfactant and the releasing agent that is dissolved in the organic solvent, oven dry makes base-material;
(3) modification: mix with adding light absorber, thinner, antistatic agent, enhancing flexibilizer, organic and inorganic filler in the base-material after the surface treatment, inserting in the mixer;
(4) mechanical grading: sieve on request, obtain the low melting point powder material of desired particle size.
Described organic pellet is polyethylene, paraffin etc.; Described surfactant is dispersing surfactant, as sodium sulfonate, neopelex, the anti-sodium sulfonate of methylene diisopropyl benzene etc.; Described releasing agent is stearates, lucite powder; Described light absorber is pigment class, benzophenone, hindered amines; Described thinner is a nanometer powder, as nano aluminium oxide, nano carborundum powder etc.; Described antistatic agent is a quaternary ammonium salt, as stearyl trimethyl ammonium chloride, stearamide propyl-beta-hydroxyethyl-dimethyl ammonium dihydrogen phosphate (ADP) etc.; Described enhancing flexibilizer is ABS, MBS resinae; Described organic filler is a cellulose family, as polystyrene, nylon-1010, rubber powder; Inorganic filler is carbonate, silicate, alumino-silicate.
Embodiment 1:
1 kilogram of polyethylene is dissolved in the carbon tetrachloride,, stirs dissolving fully after 40 minutes with machine,massing (2000 rev/mins of rotating speeds), under agitation slowly add precipitating reagent water, after treating that precipitation fully, with revolving the sieve screening of shaking, make the wax powder with bottle,suction filtration, dry back.
The wax powder that said method is obtained utilizes spraying apparatus to add the vaporific surfactant that is dissolved in the organic solvent: neopelex 1 gram and releasing agent in double-cone mixer: zinc stearate 1 gram, and dry in vacuum drying oven at last.
Light absorber will be added: carbon black 0.1 gram in the above-mentioned base-material, thinner: nano alumina powder 0.5 gram, antistatic agent: stearylamine propyl group-beta-hydroxyethyl-dimethyl ammonium dihydrogen phosphate (ADP) 0.1 gram, strengthen flexibilizer: ABS 1 gram, organic filler polystyrene 3 gram and inorganic fillers: behind calcium carbonate 2 grams, in double-cone mixer, mix, promptly get final products-low melting point powder material through screening.
Embodiment 2:
Get 1 kilogram of paraffin, make the wax powder by the method for embodiment 1; Get anti-sodium sulfonate 10 grams of methylene diisopropyl benzene, lucite powder 5 grams are by above-mentioned surface treatment method; Get 2,4-dihydroxy benaophenonel 5 grams, carborundum powder 20 grams, stearic trimethyl ammonium chloride 2 grams, MBS resin 10 grams, the Buddhist nun restrains 1,010 20 grams, alumina silicate 10 grams, by above-mentioned method of modifying modification, screening.
Embodiment 3:
Get 1 kilogram of described organic pellet, make the wax powder by the method for embodiment 1, get neopelex 2 grams, lucite powder 2 grams are handled by above-mentioned surface treatment method; Get carbon black 0.2 gram, nano silicon 3 grams, stearyl trimethyl ammonium chloride 0.3 gram, ABS 3 grams, polystyrene 10 grams, calcium carbonate superfine powder 3 grams are by sieving after the above-mentioned method of modifying modification.
The present invention can also be with described organic pellet at-60 ℃--make the wax powder after pulverizing processing, screening in 150 ℃ the freezing crushing equipment.And then obtain required low melting point powder material by above-mentioned surface treatment and method of modifying.
The low melting point powder material that is suitable for the laser sintering and moulding precisely casting wax mold that the present invention makes, check after tested, its main performance index is as follows:
Outward appearance: white powder
Granularity: 100-160 order
Fusing point: 70 ℃-140 ℃
Mean molecule quantity: 2000-200000
The present invention with can be used for other organic powder materials of laser sintering and moulding such as polystyrene (PS), Merlon (PC) is compared, because main component is the wax powder, and through technologies such as surface treatment and modifications Step has the following advantages it: sintering character is good, need not give heat; Processability is good, profiled member Quality is good; Good to essence casting adaptability, easy demoulding during smart casting can remove totally with steaming process, need not fire Burn and decompose, avoided environmental pollution. So, have better market application foreground. The present invention is made The low melting point powder material that gets is used for laser sintering rapid forming technology, can be directly, quickly and easily Produce the hot investment casting wax-pattern, greatly simplified wax-pattern manufacturing process, shortened the production cycle, reduce Product cost, realize flexible production so that new product development speed is accelerated, possess stronger market and compete Strive ability.
Claims (2)
1, a kind of low melting point powder material manufacturing process of laser sintering fast forming precisely casting wax mold, it is characterized in that: described dusty material is to add in the wax powder that utilizes organic pellet to make: surfactant, releasing agent, light absorber, thinner, antistatic agent, strengthen flexibilizer and organic, inorganic filler, its content is: add in organic pellet of per 1 kilogram of preparation wax powder: surfactant 1-10 gram, releasing agent 1-5 gram, light absorber 0.1-5 gram, thinner 0.5-20 gram, antistatic agent 0.1-2 gram, strengthen flexibilizer 1-10 gram, filler 5-30 gram, its making step comprises:
(1) wax powder preparation: adopt chemical synthesis or mechanical cryogenic freezing comminuting method;
Chemical synthesis: described organic pellet is added to stirring and dissolving in the chlorinated hydrocarbon solution, adds the precipitating reagent post precipitation and filter, oven dry, screening make the wax powder;
Machinery cryogenic freezing comminuting method: described organic pellet is cooled to-60 ℃ in low-temperature freezing facilities--150 ℃, pulverize processing, screening makes the wax powder;
(2) surface treatment: above-mentioned wax powder is put into mixer, add vaporific surfactant and the releasing agent that is dissolved in the organic solvent, oven dry makes base-material;
(3) modification: will add light absorber, thinner, antistatic agent, enhancing flexibilizer, organic and inorganic filler in the base-material after the surface treatment;
(4) mechanical grading: in mixer, mix the back screening, obtain the low melting point powder material of desired particle size.
2, according to the described low melting point powder material manufacturing process of claim 1, it is characterized in that: organic pellet of described preparation wax powder is polyethylene, paraffin; Surfactant is dispersing surfactant: sodium sulfonate, neopelex, the anti-sodium sulfonate of methylene diisopropyl benzene; Releasing agent is stearates, lucite powder; Light absorber is pigment class, benzophenone, hindered amines; Thinner is a nanometer powder, as nano aluminium oxide, nano carborundum powder; Antistatic agent is a quaternary ammonium salt: stearyl trimethyl ammonium chloride, stearamide propyl-beta-hydroxyethyl-dimethyl ammonium dihydrogen phosphate (ADP); Enhancing flexibilizer is ABS, MBS resinae; Organic filler is a cellulose family: polystyrene, nylon-1010, rubber powder; Inorganic filler is carbonate, silicate, alumino-silicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011191554A CN1140362C (en) | 2001-05-15 | 2001-05-15 | Low melting point powder material for laser sintering fast forming precisely casting wax mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011191554A CN1140362C (en) | 2001-05-15 | 2001-05-15 | Low melting point powder material for laser sintering fast forming precisely casting wax mold |
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| Publication Number | Publication Date |
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| CN1326828A CN1326828A (en) | 2001-12-19 |
| CN1140362C true CN1140362C (en) | 2004-03-03 |
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| CNB011191554A Expired - Fee Related CN1140362C (en) | 2001-05-15 | 2001-05-15 | Low melting point powder material for laser sintering fast forming precisely casting wax mold |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597425B (en) * | 2009-07-07 | 2011-06-01 | 中北大学 | Rapid laser sintering molding material based on polycarbonate powder |
| CN102430711A (en) * | 2011-12-31 | 2012-05-02 | 中国兵器工业集团第七0研究所 | Rapid manufacturing method of booster turbine impeller |
| CN102850808B (en) * | 2012-09-18 | 2014-05-14 | 中北大学 | Composite wax powder forming material for laser sintering and preparation method thereof |
| CN103042179A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七〇研究所 | Manufacturing method of compressor volute casing |
| CN104294405A (en) * | 2013-09-16 | 2015-01-21 | 青岛尤尼科技有限公司 | 3D printing material based on edible wax |
| CN104693579B (en) * | 2015-02-17 | 2017-01-04 | 北京北方恒利科技发展有限公司 | Laser sintered 3D prints with composite modified wax powder and preparation method thereof |
| CN105414484A (en) * | 2015-11-24 | 2016-03-23 | 怀宁县群力汽车配件有限公司 | Fired mold precise casting technology for producing automobile H-shaped front shaft |
| EP3405503B1 (en) | 2016-01-21 | 2021-11-17 | 3M Innovative Properties Company | Additive processing of fluoropolymers |
| CN106312046A (en) * | 2016-08-29 | 2017-01-11 | 安徽奥斯博医疗仪器设备有限公司 | High-performance 3D printing alloy supplies |
| CN108165028A (en) * | 2017-12-29 | 2018-06-15 | 广州市德馨蜡制品有限公司 | One kind is for selective laser sintering 3D printing hot investment casting wax-pattern dusty material and preparation method and application |
| CN108129855A (en) * | 2017-12-29 | 2018-06-08 | 广州市德馨蜡制品有限公司 | A kind of hot investment casting 3D printing wax powder end mould material and preparation method thereof |
| CN108047730A (en) * | 2017-12-29 | 2018-05-18 | 广州市德馨蜡制品有限公司 | It is a kind of for 3D printing wire rod of intelligence development education and preparation method and application |
| CN108192360A (en) * | 2017-12-29 | 2018-06-22 | 广州市德隆化工贸易有限公司 | A kind of dental selective laser sintering 3D printing wax powder and preparation method thereof |
| CN108841016B (en) * | 2018-06-14 | 2020-06-30 | 四川大学 | Method for preparing spherical powder for selective laser sintering from high-molecular fibers |
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