CN110142413A - It is a kind of for metal powder injection molded no wax pattern feeding and preparation method thereof - Google Patents
It is a kind of for metal powder injection molded no wax pattern feeding and preparation method thereof Download PDFInfo
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- CN110142413A CN110142413A CN201910460329.9A CN201910460329A CN110142413A CN 110142413 A CN110142413 A CN 110142413A CN 201910460329 A CN201910460329 A CN 201910460329A CN 110142413 A CN110142413 A CN 110142413A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/108—Mixtures obtained by warm mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
Abstract
The invention discloses a kind of for metal powder injection molded no wax pattern feeding and preparation method thereof, and the no wax pattern feeding includes component by percent by volume: metal powder: 50%-70%；Acetal resin: 24%-40%；Polyethylene: 3%-6%；Compatilizer: 2%-3%；Surfactant: 0.5-1%.The material of the metal powder includes iron, stainless steel, tungsten, titanium.The acetal resin is copolymerized methanal.The compatilizer is acetic acid-acetate ethylene copolymer.The surfactant is one of stearic acid and butyl stearate.The present invention has better shape retentivity while guaranteeing that feeding has suitable viscosity and mobility, ensure that the injection in production process, unsticking process do not occur defect, and can be sintered out the product for meeting performance requirement.Due to being entirely free of wax, it is more suitable technical grade sintering furnace or continuous oven, extends furnace life, improve product production capacity.
Description
Technical field
The present invention relates to the metal injection molded fields (MIM) more particularly to a kind of for metal powder injection molded nothing
Wax pattern feeding and preparation method thereof.
Background technique
It can be divided into three categories for metal powder injection molded feeding by the difference of main binding agent ingredient: (1) water base
Feeding.Its main binding agent ingredient is water-soluble oligomer, such feeding good fluidity, but be not easily controlled when degreasing de-
Rouge rate is easy to form defect in degreased blank, and shape retentivity is poor, and product yield is very low, so not obtaining further genralrlization；
(2) cerul feeding.Its main binding agent ingredient is paraffin.Such feeding mobility is preferable, has since paraffin removes to need to use
The method of solvent extraction, so degreasing time is very long, with the increase of product thickness, degreasing time becomes industrially
It is impatient at, at present in addition to some special metal materials, seldom applies cerul feeding；(3) base feeding is moulded.Its main binding agent
Ingredient is thermoplastic acetal resin, and such feeding mobility is slightly worse, but shape retentivity is strong, and de- using nitric acid catalysis
Except acetal resin, ultrahigh in efficiency is used by industry extensively.
Currently, industrial production is mostly cerul and modeling base feeding with injection moulding feeding, either cerul still moulds base feeding
In order to improve mobility, it is all added to a large amount of paraffin.Although the addition of paraffin improves the mobility of feeding, when injection moulding
Cast parts intensity is lower, when sample is there are when the weak structure such as thin-walled or tiny back-off, be easily deformed when process after progress or
It damages, causes product yield relatively low, the production cost increases.The feeding of the content of wax increases the time of hot unsticking, and the period is longer, product
Be easily deformed, heat when de- carbon more difficult to control become gaseous carbon dioxide completely, so carbon content can be corresponding higher in product.
Content of wax feeding is exactly to be liable to stick to the inner wall and pump-line of sintering furnace when being sintered removing there are one shortcoming
Everywhere, it and is difficult to clear up removal, be polluted to equipment.Especially industrial continuous oven, typically booting operation throughout the year,
Once the pollution by wax, it is necessary to which maintenance shut-downs do not meet equipment curing requirements not only, and frequent start-stop equipment also largely effects on production
Energy efficiency, improves operation cost.
Summary of the invention
In order to overcome the above technical problems, the present invention provides a kind of for metal powder injection molded no wax pattern feeding
And preparation method thereof, to solve when metal injection molded either cerul still moulds base feeding because when being added to a large amount of paraffin,
Although the mobility of feeding improves, when injection moulding, cast parts intensity is lower, the problem of polluting to equipment.
In a first aspect, the present invention provides a kind of for metal powder injection molded no wax pattern feeding, by volume basis
Than including component:
Metal powder: 50%-70%；
Acetal resin: 24%-40%；
Polyethylene: 3%-6%；
Compatilizer: 2%-3%；
Surfactant: 0.5-1%.
Further, the material of the metal powder includes iron, stainless steel, tungsten, titanium.
Further, the acetal resin is copolymerized methanal.
Further, the compatilizer is acetic acid-acetate ethylene copolymer.
Further, the surfactant is one of stearic acid and butyl stearate.
Second aspect, the present invention also provides a kind of preparation sides for metal powder injection molded no wax pattern feeding
Method, comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 200 DEG C -240 degrees Celsius, it is electromechanical to open mixing
Source, set temperature are 180 DEG C -200 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Resin, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component
Agglomeration；
5. particle will obtain agglomeration by Material disintegrator and carry out particle after mixing；
6. being granulated, broken good material is added in pelletizer and is granulated；
It mixes, is obtained for metal powder injection molded no wax 7. the feeding being granulated is added in batch mixer
Type feeding.
Further, the step 4 specifically includes step:
4.1, mixer cylinder body 25-35min is preheated, when mixer temperature is up to 125 DEG C -135 DEG C, by load weighted metal
Powder is added in mixing cylinder, closes cylinder mixing 5-10min；
4.2, the surfactant weighed up in proportion is uniformly added into mixing cylinder, closes cylinder mixing 10-15min；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing 45-
55min；
4.4, when mixer temperature reaches 170-185 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, no
Then extend mixing time to feeding to agglomerate.
Further, the step 5 specifically includes step:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 10~15min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle.
Further, the step 6 specifically includes step:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, and gun barrel is begun to warm up；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value is reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated.
Further, the set temperature of the gun barrel are as follows: the temperature in 1st~3 area is 167 DEG C -173 DEG C, the temperature in 4th area is
173 DEG C -179 DEG C, the temperature in 5th area be 187 DEG C -193 DEG C；
The screw speed is 15r/s-25r/s, cutter rotating velocity 26r/s-36r/s, the particle diameter and length of granulation
It is 2.5mm-3.5mm.
Compared with prior art, the invention has the following beneficial effects:
A kind of metal injection molded feeding of not content of wax according to the present invention, guarantee feeding have suitable viscosity and
While mobility, while there is better shape retentivity, ensure that the injection in production process, unsticking process do not go out
Existing defect, and the product for meeting performance requirement can be sintered out.Due to being entirely free of wax, it is more suitable technical grade sintering furnace or continuous
Furnace, because industrial continuous oven is typically all booting operation throughout the year, once the pollution by wax, it is necessary to maintenance shut-downs, not only not
Meet equipment curing requirements, frequent start-stop equipment also largely effects on capacity efficiency, improves operation cost.Therefore using the not content of wax
Feeding can extend furnace life, improve product production capacity.
Detailed description of the invention
Fig. 1 is the preparation method flow diagram of the embodiment of the present invention one.
Specific embodiment
The object of the invention will be described in further detail combined with specific embodiments below, wherein identical zero
Part is presented with like reference characters.It should be noted that word "front", "rear" used in the following description, "left", "right",
"up" and "down" refers to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction of the heart.
Embodiment 1
It is a kind of for metal powder injection molded no wax pattern feeding, include component by percent by volume:
304L powder of stainless steel: 57%；
Acetal resin: 33%；
Polyethylene: 6%；
Acetic acid-acetate ethylene copolymer: 3%；
Stearic acid: 1%.
As shown in Figure 1, the preparation method without wax pattern feeding of the present embodiment comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 200 DEG C, opens mixing electromechanical source, set temperature
It is 180 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Resin, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component
Agglomeration, specifically includes step:
4.1, mixer cylinder body 25min is preheated, when mixer temperature is up to 125 DEG C, load weighted metal powder is added
In mixing cylinder, cylinder mixing 5min is closed；
4.2, by the even addition mixing cylinder of the equal SA of the surfactant weighed up in proportion, cylinder mixing 10min is closed；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing
45min；
4.4, when mixer temperature reaches 180 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, and otherwise prolongs
Long mixing time to feeding agglomerates；
5. particle will obtain agglomeration by Material disintegrator and carry out particle, specifically includes step after mixing:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 10min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle；
6. being granulated, broken good material is added in pelletizer and is granulated, step is specifically included:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, gun barrel is begun to warm up,
The set temperature of the gun barrel are as follows: the temperature in 1st~3 area is 167 DEG C, the temperature in 4th area is 173 DEG C, the temperature in 5th area is 187 DEG C；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value being reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated,
The screw speed is 15r/s, cutter rotating velocity 26r/s, and the particle diameter and length of granulation are 2.5mm-3.5mm.
It is mixed 7. the feeding being granulated is added in V-type batch mixer with 800KG or so (close to batch mixer maximum size)
40 minutes, obtain more uniform metal powder injection molding feeding.
Finally, the material mixed every time is denoted as a batch, labelled warehouse entry is packed.
Embodiment 2
It is a kind of for metal powder injection molded no wax pattern feeding, include component by percent by volume:
Iron powder: 60%；
Acetal resin: 34%；
Polyethylene: 3%；
Acetic acid-acetate ethylene copolymer: 2.5%；
Butyl stearate: 0.5%.
The preparation method without wax pattern feeding of the present embodiment comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 220 DEG C, opens mixing electromechanical source, set temperature
It is 190 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Resin, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component
Agglomeration, specifically includes step:
4.1, mixer cylinder body 30min is preheated, when mixer temperature is up to 130 DEG C, load weighted metal powder is added
In mixing cylinder, cylinder mixing 8min is closed；
4.2, the surfactant SA weighed up in proportion is uniformly added into mixing cylinder, closes cylinder mixing 15min；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing
50min；
4.4, when mixer temperature reaches 190 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, and otherwise prolongs
Long mixing time to feeding agglomerates；
5. particle will obtain agglomeration by Material disintegrator and carry out particle, specifically includes step after mixing:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 15min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle；
6. being granulated, broken good material is added in pelletizer and is granulated, step is specifically included:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, gun barrel is begun to warm up,
The set temperature of the gun barrel are as follows: the temperature in 1st~3 area is 170 DEG C, the temperature in 4th area is 176 DEG C, the temperature in 5th area is 190 DEG C；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value being reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated,
The screw speed is 20r/s, cutter rotating velocity 30r/s, and the particle diameter and length of granulation are 2.5mm-3.5mm.
It is mixed 7. the feeding being granulated is added in V-type batch mixer with 800KG or so (close to batch mixer maximum size)
40 minutes, obtain more uniform metal powder injection molding feeding.
Finally, the material mixed every time is denoted as a batch, labelled warehouse entry is packed.
Embodiment 3:
It is a kind of for metal powder injection molded no wax pattern feeding, include component by percent by volume:
Tungsten powder: 62%；
Acetal resin: 31%；
Polyethylene: 4%；
Acetic acid-acetate ethylene copolymer: 2.5%；
Stearic acid: 0.5%
The preparation method without wax pattern feeding of the present embodiment comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 240 DEG C, opens mixing electromechanical source, set temperature
It is 200 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Resin, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component
Agglomeration, specifically includes step:
4.1, mixer cylinder body 30min is preheated, when mixer temperature is up to 140 DEG C, load weighted metal powder is added
In mixing cylinder, cylinder mixing 8min is closed；
4.2, the surfactant weighed up in proportion is uniformly added into mixing cylinder, closes cylinder mixing 10min；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing
50min；
4.4, when mixer temperature reaches 200 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, and otherwise prolongs
Long mixing time to feeding agglomerates；
5. particle will obtain agglomeration by Material disintegrator and carry out particle, specifically includes step after mixing:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 15min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle；
6. being granulated, broken good material is added in pelletizer and is granulated, step is specifically included:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, gun barrel is begun to warm up,
The set temperature of the gun barrel are as follows: the temperature in 1st~3 area is 173 DEG C, the temperature in 4th area is 179 DEG C, the temperature in 5th area is 193 DEG C；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value being reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated,
The screw speed is 25r/s, cutter rotating velocity 36r/s, and the particle diameter and length of granulation are 2.5mm-3.5mm.
It is mixed 7. the feeding being granulated is added in V-type batch mixer with 800KG or so (close to batch mixer maximum size)
40 minutes, obtain more uniform metal powder injection molding feeding.
Finally, the material mixed every time is denoted as a batch, labelled warehouse entry is packed.
Embodiment 4:
It is a kind of for metal powder injection molded no wax pattern feeding, include component by percent by volume:
Titanium valve: 58%；
Acetal resin: 34%；
Polyethylene: 5%；
Acetic acid-acetate ethylene copolymer: 2.5%；
Stearic acid: 0.5%.
The preparation method without wax pattern feeding of the present embodiment comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 230 DEG C, opens mixing electromechanical source, set temperature
It is 200 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Resin, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component
Agglomeration, specifically includes step:
4.1, mixer cylinder body 30min is preheated, when mixer temperature is up to 130 DEG C, load weighted metal powder is added
In mixing cylinder, cylinder mixing 8min is closed；
4.2, the surfactant SA weighed up in proportion is uniformly added into mixing cylinder, closes cylinder mixing 10min；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing
50min；
4.4, when mixer temperature reaches 200 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, and otherwise prolongs
Long mixing time to feeding agglomerates；
5. particle will obtain agglomeration by Material disintegrator and carry out particle, specifically includes step after mixing:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 15min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle；
6. being granulated, broken good material is added in pelletizer and is granulated, step is specifically included:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, gun barrel is begun to warm up,
The set temperature of the gun barrel are as follows: the temperature in 1st~3 area is 170 DEG C, the temperature in 4th area is 176 DEG C, the temperature in 5th area is 190 DEG C；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value being reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated,
The screw speed is 25r/s, cutter rotating velocity 36r/s, and the particle diameter and length of granulation are 2.5mm-3.5mm.
It is mixed 7. the feeding being granulated is added in V-type batch mixer with 800KG or so (close to batch mixer maximum size)
40 minutes, obtain more uniform metal powder injection molding feeding.
Finally, the material mixed every time is denoted as a batch, labelled warehouse entry is packed.
Some performance characterizations and experiment number have been carried out below for the feeding of the content of wax and the improved not content of wax before improvement
According to comparison, as a result such as the following table 1:
Table 1
Above-mentioned degreasing efficiency refers to the removal efficiency of the POM in unsticking 6h under purity is 99% nitric acid atmosphere.It is sintered close
Degree is the percentage of actual density and theoretical density.Because of the initial carbonaceous amount of each product and structural constituent difference, therefore in table
Residual carbon content and mechanical property after qualitative description sintering, but products obtained therefrom is all satisfied industry relevant criterion.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all of the invention
Made any modifications, equivalent replacements, and improvements etc., should be included in the protection of the claims in the present invention within spirit and principle
Within the scope of.
Claims (10)
1. a kind of for metal powder injection molded no wax pattern feeding, which is characterized in that by percent by volume include component:
Metal powder: 50%-70%；
Acetal resin: 24%-40%；
Polyethylene: 3%-6%；
Compatilizer: 2%-3%；
Surfactant: 0.5-1%.
2. according to claim 1 be used for metal powder injection molded no wax pattern feeding, which is characterized in that the gold
The material for belonging to powder includes iron, stainless steel, tungsten, titanium.
3. according to claim 1 be used for metal powder injection molded no wax pattern feeding, which is characterized in that described is poly-
Formaldehyde resin is copolymerized methanal.
4. according to claim 1 be used for metal powder injection molded no wax pattern feeding, which is characterized in that described compatible
Agent is acetic acid-acetate ethylene copolymer.
5. according to claim 1 be used for metal powder injection molded no wax pattern feeding, which is characterized in that the surface
Activating agent is one of stearic acid and butyl stearate.
6. a kind of preparation method for being used for metal powder injection molded no wax pattern feeding as described in claim 1, feature exist
In, comprising steps of
1. equipment cleaning, before booting, progress clear processing first, correlation board and equipment needed for clearing up mixing；
2. preheating mixer, oil temperature electromechanical source is opened, temperature is set as 200 DEG C -240 degrees Celsius, opens mixing electromechanical source, if
Determining temperature is 180 DEG C -200 DEG C；
3. electronic scale weighs corresponding metal powder, polyformaldehyde tree on the basis of the mixed 35KG-40KG powder of the every cylinder of mixer
Rouge, polyethylene, compatilizer, surfactant；
4. feed mixing, load weighted each component is added in mixing cylinder by setting sequence and carries out mixing, until each component agglomerates；
5. particle will obtain agglomeration by Material disintegrator and carry out particle after mixing；
6. being granulated, broken good material is added in pelletizer and is granulated；
It is mixed 7. the feeding being granulated is added in batch mixer, obtains feeding for metal powder injection molded no wax pattern
Material.
7. preparation method according to claim 6, which is characterized in that the step 4 specifically includes step:
4.1, mixer cylinder body 25-35min is preheated, when mixer temperature is up to 125 DEG C -135 DEG C, by load weighted metal powder
It is added in mixing cylinder, closes cylinder mixing 5-10min；
4.2, the surfactant weighed up in proportion is uniformly added into mixing cylinder, closes cylinder mixing 10-15min；
4.3, load weighted acetal resin, polyethylene, compatilizer are uniformly added into mixing cylinder body, close cylinder mixing 45-
55min；
4.4, when mixer temperature reaches 170-185 DEG C and each component has agglomerated, when being rendered as bulk, mixing terminates, and otherwise prolongs
Long mixing time to feeding agglomerates.
8. preparation method according to claim 6, which is characterized in that the step 5 specifically includes step:
5.1, mixing is poured out at the material of bulk, is cut into small pieces and cooling down 10 ~ 15min makes block be hardened so as to particle；
5.2, Material disintegrator is opened, the block being cut into small pieces is put into the pack of Material disintegrator particle.
9. preparation method according to claim 6, which is characterized in that the step 6 specifically includes step:
6.1, pelletizer general supply is opened, power supply indicator is bright at this time；
6.2, the temperature for successively setting one area Qu Zhiwu of gun barrel is set according to the requirements of process parameters, and gun barrel is begun to warm up；
6.3, broken good material is added in pelletizer funnel, places splicing cylinder in discharge port；
6.4, setting value is reached to gun barrel temperature, successively opens pelletizer end hair dryer, cutter, screw rod start to be granulated.
10. preparation method according to claim 9, which is characterized in that
The set temperature of the gun barrel are as follows: the temperature in 1st ~ 3 area is 167 DEG C -173 DEG C, the temperature in 4th area is 173 DEG C -179 DEG C, 5th area
Temperature be 187 DEG C -193 DEG C；
The screw speed is 15 r/s -25r/s, cutter rotating velocity is 26 r/s -36r/s, the particle diameter and length of granulation
It is 2.5 mm -3.5mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399667A (en) * | 2021-06-11 | 2021-09-17 | 深圳市泛海统联精密制造股份有限公司 | Titanium alloy metal powder injection molding feed and preparation method thereof |
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