CN107755702A - Improved powder injection molding compound, product made therefrom and method of making the product - Google Patents
Improved powder injection molding compound, product made therefrom and method of making the product Download PDFInfo
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- CN107755702A CN107755702A CN201610830032.3A CN201610830032A CN107755702A CN 107755702 A CN107755702 A CN 107755702A CN 201610830032 A CN201610830032 A CN 201610830032A CN 107755702 A CN107755702 A CN 107755702A
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- powder
- ejection formation
- product
- bonding agent
- injection molding
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- 239000000843 powder Substances 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000004413 injection moulding compound Substances 0.000 title 1
- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 16
- 229920000098 polyolefin Polymers 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 92
- 230000015572 biosynthetic process Effects 0.000 claims description 58
- 239000007767 bonding agent Substances 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 210000001161 mammalian embryo Anatomy 0.000 claims description 17
- 239000012188 paraffin wax Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 235000021355 Stearic acid Nutrition 0.000 claims description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 12
- 239000008117 stearic acid Substances 0.000 claims description 12
- 239000004641 Diallyl-phthalate Substances 0.000 claims description 11
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 11
- 238000000518 rheometry Methods 0.000 claims description 11
- 239000004203 carnauba wax Substances 0.000 claims description 9
- 230000006872 improvement Effects 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 claims 1
- 150000008064 anhydrides Chemical group 0.000 claims 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims 1
- 239000011976 maleic acid Substances 0.000 claims 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims 1
- -1 polyoxymethylene Polymers 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 8
- 239000011230 binding agent Substances 0.000 abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 2
- 229930195733 hydrocarbon Natural products 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000012778 molding material Substances 0.000 abstract 2
- 239000006254 rheological additive Substances 0.000 abstract 2
- 229930040373 Paraformaldehyde Natural products 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 48
- 239000000428 dust Substances 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 13
- 239000004702 low-density polyethylene Substances 0.000 description 13
- 229920001684 low density polyethylene Polymers 0.000 description 12
- 239000004200 microcrystalline wax Substances 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 10
- 229920000092 linear low density polyethylene Polymers 0.000 description 10
- 239000004707 linear low-density polyethylene Substances 0.000 description 10
- 229940099514 low-density polyethylene Drugs 0.000 description 10
- 229920000573 polyethylene Polymers 0.000 description 10
- 238000002156 mixing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 235000013869 carnauba wax Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000004563 wettable powder Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- 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
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention provides an improved powder injection molding shot, a product made therefrom, and a method of making the product, wherein the improved powder injection molding shot comprises: a sinterable powder, and a binder comprising a binder with a hydrocarbon wax, a surfactant, a polyolefin compound, polyoxymethylene, and a rheology modifier. The powder injection molding material of the invention contains the rheology modifier, so that the powder injection molding material is reduced to become an expansion fluid in a high shear strain rate (high shear rate) region, and the quality of a product can be improved under the condition of maintaining a high injection speed.
Description
Technical field
The present invention shoots material on a kind of powder ejection formation of improvement, is on utilizing dilatancy stream more specifically
A kind of powder with the rheological behavior improved that the good PIM ejection formations for pseudoplastic fluid of structural reform shoot material obtained by improved method
Ejection formation shoots material, the manufacture method using its manufactured product and the product.
Background technology
Powder ejection formation is a kind of Parts manufacturing technology, and it combines the technology of plastic ejection moulding and powder, wherein
It is main to be divided into metal dust ejection formation (Metal Injection Molding, MIM) and ceramic powders ejection formation again
(Ceramic Injection Molding, CIM) two big application fields, these technologies have in apparent good order and condition, molding cycles
Hurry up, precision is high and uniform quality, the advantages of being adapted to a large amount of production complicated shapes and can reducing following process etc., therefore by work
Industry is widely paid attention to.The basic step of powder ejection formation is that metal dust or ceramic powders are added into bonding agent (binder)
In, using bonding agent as carrier, (kneading) is kneaded under proper temperature to treat plastics, after made a living through ejaculator ejection formation
Embryo, then the bonding agent in raw embryo is removed through skimming processes, then sinter part into.
Bonding agent in shooting material will influence whether the properties of injection molding links and material.Preferably combine
Agent should be able to wetting powder surface, and the viscosity to shoot material can be reduced well, meet the requirement of flow of metal performance, and improve
The useful load of solid powder.In general, binder is mostly high-molecular compound, and the pseudo plastic based on high-molecular compound is special
Property, ideally, the viscosity to shoot material can become greatly and step-down because of the shear strain rate applied during ejection formation, but in fact,
The rheological behavior to shoot material can become considerably complicated and can not maintain to intend always because of the presence of metal dust or ceramic powders
Plastic properties.Specifically, during ejection formation, shooting material may can occur such as in the range of specific shear strain rate
Viscosity reversal development shown in Fig. 1.In detail, as seen from Figure 1, the viscosity to shoot material originally is with the increase of shear strain rate
And decline, however, in region a, the viscosity to shoot material but becomes to rise with the increase of shear strain rate, i.e. shear herein
In the range of strain rate, shooting material can be changed into expanding fluid from pseudoplastic fluid, and this is " viscosity reversal development " referred to herein.It is glutinous
If degree reversal development is betided in high shear rates region, it will the viscosity for making to shoot material rises and mobility declines, and causes
Bonding agent in shooting material separates with metal dust or ceramic powders, so as to reduce the quality of injection-molded product.If in order to maintain
Product quality and avoid occur viscosity reversal development high shear rates region, then can be made due to too low shear strain rate
Product yield reduces.
The content of the invention
In view of above-mentioned problem of the prior art, shot material it is an object of the invention to provide a kind of powder ejection formation and sharp
With its manufactured product and Manufacturing Method of Products, wherein described shoot material via suppressing to expand in high shear rates region
Property fluid improvement for pseudoplastic fluid situation, so as to improve the quality of injection-molded product.
According to the purpose of the present invention, propose that a kind of powder ejection formation shoots material, it includes sinterable powder and combination
Agent, wherein bonding agent include chloroflo, interfacial agent, polyolefin compound, polyformaldehyde and selected from by palm wax
(carnauba wax), diallyl phthalate prepolymer (diallyl phthalate prepolymer), polyurethane
And one or rheology modifying agent of its any combination in the group that is formed of acrylate copolymer (acrylic polymer).
Preferably, powder ejection formation, which shoots material, can further include the polyolefin with maleic acid anhydride group.
Preferably, powder ejection formation shoot material in maleic acid anhydride group polyolefin can have about 90,000 to
About 110,000 mean molecule quantity.
Preferably, the sinterable powder during powder ejection formation shoots material may be selected from by metal dust, metal alloy powders, gold
In the group that category carbonyl dust, ceramic powders and combinations thereof are formed.
Preferably, the chloroflo during powder ejection formation shoots material can be paraffin and rheology modifying agent can be palm wax.
According to another object of the present invention, there is provided a kind of method for manufacturing powder injection-molded product, it includes following step
Suddenly：Shot material with above-mentioned powder ejection formation, raw embryo is made using injection molding method；By raw embryo directly with about 600 to about
1000 DEG C of heating carry out de- ester for about 90 to about 150 minutes；And the raw embryo through de- ester is sintered about at about 1200 to about 1360 DEG C
120 to about 240 minutes.
According to a further object of the present invention, there is provided a kind of powder injection-molded product, it is to be made by above-mentioned method.
From the above, shoot material to prevent or reduce according to the powder ejection formation of the present invention and shoot material in high shear rates area
When in domain, phenomenon that the bonding agent caused by viscosity reversal development separates with metal dust or ceramic powders, while maintain to penetrate
Metal dust or ceramic powders are in more than 60vol% in material, with improve the density of the raw embryo of ejection formation formation, mitigate project into
The degree of difficulty of the follow-up de- ester step of type raw embryo, the intensity for maintaining injection-molded product and quality while maintain yield.
Brief description of the drawings
Fig. 1 is to illustrate the graph of a relation of the viscosity of viscosity reversal development and shear strain rate.
Fig. 2 is to shoot material to manufacture ejection formation using powder ejection formation of the invention according to the embodiment of the present invention
The flow chart of product.
Fig. 3 to Figure 11 be according to present example the viscosity (η (Pa.s)) to shoot material and shear strain rate ( )
Graph of a relation.
Figure 12 is according to present example and the viscosity to shoot material of comparative example and the graph of a relation of shear strain rate.
Figure 13 and Figure 14 be respectively according to the present invention manufacture powder injection-molded product method, using present example with
The manufactured product top view that shoots material of comparative example.
In figure：S1~S5：Step
Embodiment
The embodiment of the present invention provides a kind of powder ejection formation of the rheological behavior with improvement and shot material, and it is included：Can
Sintered powder and bonding agent, wherein bonding agent include chloroflo, interfacial agent, polyolefin compound, polyformaldehyde and are selected from
One in the group be made up of palm wax, diallyl phthalate prepolymer, polyurethane and acrylate copolymer or
Its rheology modifying agent being combined.
In one embodiment, the mean molecule quantity of the polyolefin with maleic acid anhydride group can be about 90,000 to about
110,000, preferably about 100,000.Polyolefin compound can be about 0.950 to about 0.965g/cm comprising density3High density
Polyethylene (HDPE) or density are about 0.915 to about 0.930g/cm3Low density polyethylene (LDPE) (LDPE), preferably high density is gathered
Ethene.
" interfacial agent " used herein refers to wettable powder, reduces the knot sticked between mould, improvement powder and bonding agent
With joint efforts and intergranular sliding compound.In one embodiment, interfacial agent is stearic acid.
" chloroflo " used herein refers to the material being made up of carbon and hydrogen.Described chloroflo is substantially free of hetero atom
(i.e. oxygen, nitrogen), but be made up of pure hydrocarbon reaction thing.The hydrocarbon structure of chloroflo can be straight chain, side chain or ring-type.Chloroflo may be from
In synthesis or natural, its source includes but is not limited to F- T synthesis, olefinic polymerization, vaseline and mineral matter.The example bag of chloroflo
Containing paraffin, beeswax, microwax etc., but not limited to this.In one embodiment, chloroflo is paraffin；In a preferred embodiment, chloroflo
For paraffin and the mixture of microwax.
" rheology modifying agent " used herein refers to functional group to increase the compound for the viscosity that shoots material, rheology modifying agent
Example include palm wax, diallyl phthalate prepolymer, polyurethane and acrylate copolymer, but not limited to this.
In one embodiment, when the chloroflo used is paraffin, rheology modifying agent is palm wax.
Sinterable powder used herein may be selected from metal dust, metal alloy powders, metal-carbonyl powder, ceramic powder
In the group that end and combinations thereof is formed, but not limited to this.Wherein, shot material when sinterable powder accounts for powder ejection formation
During below 60vol%, the raw embryo of ejection formation possibly can not have gratifying density, cause the difficulty of follow-up de- ester step
Degree increases the intensity for simultaneously reducing product after sintering, therefore sinterable powder preferably shoots material 60vol% to account for powder ejection formation
More than.
In an alternative embodiment of the invention, the powder ejection formation middle polyolefin compound that shoots material accounts for powder ejection formation and shot material
About 1wt%~3wt%；Polyformaldehyde accounts for powder ejection formation and shot material about 0.5wt%~1wt%；Interfacial agent accounts for powder injection
It is molded the about 0.2wt%~1wt% that shoots material；Chloroflo accounts for powder ejection formation and shot material 1wt%~3wt%；Rheology modifying agent accounts for powder
Ejection formation shoots material 1wt%~2wt%；And sinterable powder accounts for powder ejection formation and shot material 90wt%~95wt%.At this
To invent in another embodiment, powder ejection formation, which shoots material, can further include the polyolefin with maleic acid anhydride group, its
In the polyolefin with maleic acid anhydride group account for powder ejection formation and shoot material about 0.01wt%~0.4wt%；Polyene hydrocarbonylation
Compound accounts for powder ejection formation and shot material about 2wt%~4wt%；Polyformaldehyde account for powder ejection formation shoot material about 0.5wt%~
0.9wt%；Interfacial agent accounts for powder ejection formation and shot material about 0.15wt%~0.9wt%；Chloroflo accounts for powder ejection formation and penetrated
Expect 2wt%~7wt%；Rheology modifying agent accounts for powder ejection formation and shot material 1wt%~6wt%；And sinterable powder accounts for powder
Ejection formation shoots material 90wt%~93wt%.
Another form of the present invention provides a kind of method for manufacturing powder injection-molded product, and this method is included such as Fig. 2 institutes
The step of showing.Fig. 2 is to shoot material to manufacture injection-molded product using powder ejection formation of the invention according to the embodiment of the present invention
Flow chart, it is comprised the steps of：
Step S1：The powder ejection formation of the present invention is shot material and is kneaded about 90 to about 150 at about 170 DEG C to about 190 DEG C
Minute, preferably it is kneaded at about 180 DEG C about 120 minutes.
Step S2：The cooling that shoots material after being sufficiently mixed, is then further crushed and is granulated after homogenizing, with profit project into
Type machine is fed.
Step S3：Using Jet forming machine by step S2 gained material grain ejection formation be product raw embryo.
Step S4：Raw embryo is directly subjected to de- ester for about 90 to about 150 minutes with about 600 to about 1000 DEG C of heating, preferably
To heat about 120 minutes at about 800 DEG C to carry out de- ester.Wherein, it is product raw embryo that " direct " described herein, which refers to ejection formation,
Afterwards, before carrying out within about 90 to about 150 minutes de- ester with about 600 to about 1000 DEG C of heating, centre is further used without any
To remove the processing of bonding agent, processing described herein includes solution-off and the de- processing of acid, but not limited to this.
Step S5：Object raw embryo after degreasing is put into sintering furnace, at about 1,200 to about 1,360 DEG C, preferably about 1,
Temperature is held at 360 DEG C about 120 to about 240 minutes, preferably about 120 minutes to sinter raw embryo, you can obtains required product.
According to the still yet another form of the present invention, there is provided a kind of powder injection-molded product, it is made by above-mentioned method.
Below be according to the embodiment of the present invention manufacture shoot material and comparative example, utilize Toyo Seiki
SeisakushoCapilograph 1D, in the range of issuing velocity is 0.1-1000mm/min, each example for measuring it is glutinous
Degree and the relation of shear strain rate are shown in Fig. 3 to Figure 11, and the viscosity of example 1 and comparative example 1 and shear strain rate
Relation is then as shown in figure 12.The composition included that shoots material of wherein each example and comparative example is listed in the table below 1.
Table 1
The manufacture to shoot material
Example 1
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin is with microwax and polyurethane (from rising sun electrochemical industry strain formula
Commercial firm buys, model UH-462), with about 1：20：7：2：30：11 weight ratio, uniformly mixed about 120 minutes at about 180 DEG C
To form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixes above-mentioned bonding agent and metal dust
(Mitsubishi 17-4PH), you can obtain shooting material for present example 1.The viscosity to shoot material at 155 DEG C and 190 DEG C of example 1 is with cutting
The relation of shear strain rate is as shown in Figure 3.
Example 2
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
Polyethylene, polyformaldehyde, stearic acid, paraffin and palm wax are spent, with about 1：20：7：2：20：11 weight ratio, at about 180 DEG C
About 120 minutes are uniformly mixed to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixing is above-mentioned
Bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 2.Example 2 shoot material at 155 DEG C and
The relation of viscosity and shear strain rate at 190 DEG C is as shown in Figure 4.
Example 3
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax and diallyl phthalate prepolymer
(being bought from Japanese DAISO Co., Ltd, model DAISO DAP-A), with about 1：10：3：1：15：6 weight ratio, at about 180 DEG C
It is lower uniformly to mix about 120 minutes to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixing is above-mentioned
Bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 3.Example 3 shoot material at 155 DEG C and
The relation of viscosity and shear strain rate at 190 DEG C is as shown in Figure 5.
Example 4
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax and diallyl phthalate prepolymer
(being bought from Japanese DAISO Co., Ltd, model DAISO DAP-K), with about 1：10：3：1：15：6 weight ratio, at about 180 DEG C
It is lower uniformly to mix about 120 minutes to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixing is above-mentioned
Bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 4.Example 4 shoot material at 155 DEG C and
The relation of viscosity and shear strain rate at 190 DEG C is as shown in Figure 6.
Example 5
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax and diallyl phthalate prepolymer
(being bought from Japanese DAISO Co., Ltd, model DAISO DAP-A), with about 1：20：7：5：30：12 weight ratio, at about 180 DEG C
It is lower uniformly to mix about 120 minutes to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixing is above-mentioned
Bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 5.Example 5 shoot material at 155 DEG C and
The relation of viscosity and shear strain rate at 190 DEG C is as shown in Figure 7.
Example 6
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax and diallyl phthalate prepolymer
(being bought from Japanese DAISO Co., Ltd, model DAISO DAP-K), with about 1：20：7：5：30：12 weight ratio, at about 180 DEG C
It is lower uniformly to mix about 120 minutes to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixing is above-mentioned
Bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 6.Example 6 shoot material at 155 DEG C and
The relation of viscosity and shear strain rate at 190 DEG C is as shown in Figure 8.
Example 7
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax, diallyl phthalate prepolymer (oneself
Japanese DAISO Co., Ltd buys, model DAISO DAP-A) and acrylate copolymer (from Toagosei Co., Ltd purchase
, model UG-4070), with about 1：20：7：2：30：12：3 weight ratio, about 120 minutes are uniformly mixed at about 180 DEG C with shape
Into bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixes above-mentioned bonding agent and metal dust (Mitsubishi
17-4PH), you can obtain shooting material for present example 7.The viscosity and the shear strain that shoot material at 155 DEG C and 190 DEG C of example 7
The relation of rate is as shown in Figure 9.
Example 8
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin and microwax, diallyl phthalate prepolymer (oneself
Japanese DAISO Co., Ltd buys, model DAISO DAP-K) and acrylate copolymer (from Toagosei Co., Ltd purchase
, model UG-4070), with about 1：20：7：2：30：12：3 weight ratio, about 120 minutes are uniformly mixed at about 180 DEG C with shape
Into bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio mixes above-mentioned bonding agent and metal dust (Mitsubishi
17-4PH), you can obtain shooting material for present example 8.The viscosity and the shear strain that shoot material at 155 DEG C and 190 DEG C of example 8
The relation of rate is as shown in Figure 10.
Example 9
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
It is 2 to spend polyethylene, polyformaldehyde, stearic acid, weight ratio：1 paraffin (is mixed from East Asia with microwax and acrylate copolymer
Synthesis Co., Ltd. buys, and model UG-4070 from Kaneka with buying, model BM310), with about 1：20：7：2：30：12：5
Weight ratio, about 120 minutes are uniformly mixed at about 180 DEG C to form bonding agent, thereafter with bonding agent：Metal dust is 40：60
Volume ratio mix above-mentioned bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for present example 9.Example
9 viscosity to shoot material at 155 DEG C and 190 DEG C and the relation of shear strain rate are as shown in figure 11.
Comparative example 1
By the LLDPE modified through maleic anhydride (maleic anhydride modified low-
density polyethylene,18302N, density 0.912g/cm3), density 0.955g/cm3It is highly dense
Spend polyethylene, polyformaldehyde, (paraffin is 2 with microwax ratio for stearic acid and wax：1), with 3：33：11：3：50 weight ratio,
About 120 minutes are uniformly mixed at about 180 DEG C to form bonding agent, thereafter with bonding agent：Metal dust is 40：60 volume ratio
Mix above-mentioned bonding agent and metal dust (Mitsubishi 17-4PH), you can obtain shooting material for comparative example 1 of the present invention.
Figure 12 is the relation to shoot material with the viscosity of comparative example and shear strain rate of present example 1 at 190 DEG C of temperature
Figure.Figure 13 is the method according to present invention manufacture powder injection-molded product, is overlooked using the manufactured product that shoots material of comparative example 1
Scheme, and Figure 14 is the method according to present invention manufacture powder injection-molded product, is overlooked using the manufactured product that shoots material of example 1
Figure.
It can be produced in high shear rates region by shooting material for comparative example 1 it can be seen from Figure 12 compares figures 13 and Figure 14
Viscosity reversal development, it causes many black traces be present on the obtained product surface that shoots material using above-mentioned comparative example 1.Therefore,
Using comparative example 1 shoot material manufacture product when, be such as intended to reduce black trace and produce with further Improving The Quality of Products, then need reduction to cut
Shear strain rate is to avoid producing the shear strain rate scope of viscosity reversal development, so as to decline product yield.Compared to
Comparative example 1, the powder ejection formation of present example 1 are shot material in high shear rates region, and viscosity reversal development is pressed down
System, so as to the pseudoplastic fluid property for keeping viscosity to decline with the increase of shear strain rate, and then can not reduce shearing
In the case of strain rate, the more uniform product in surface is obtained.
Therefore it is known that suppressing issuable reversion in high shear rates region via rheology modifying agent is added
Phenomenon, powder ejection formation of the invention shoot material can the content of sinterable powder wherein strained higher than 60vol% and high shear
In the case of rate, the property of pseudoplastic fluid of shooting material is maintained, so as to mitigate the tired of the follow-up de- ester step of ejection formation raw embryo
Difficulty, and the bonding agent and metal dust in shooting material can be avoided in the case where maintaining the intensity of injection-molded product and yield
Or ceramic powders separation caused by black trace the defects of produce, cause the reduction of injection-molded product quality.
Illustrative is the foregoing is only, rather than is restricted person.Any spirit and scope without departing from the present invention, and to it
The equivalent modifications of progress or change, it is intended to be limited solely by the claims in the present invention protection domain.
Claims (8)
1. a kind of powder ejection formation of improvement shoots material, it is characterised in that including：
One sinterable powder；And
One bonding agent, including：
One chloroflo；
One interfacial agent；
One polyolefin compound；
Polyformaldehyde；And
One rheology modifying agent, it is selected from by palm wax, polyurethane, diallyl phthalate prepolymer and acrylate copolymer
One or its any combination in the group formed.
2. powder ejection formation as claimed in claim 1 shoots material, it is characterised in that further comprises that one carries maleic acid
The polyolefin of anhydride group.
3. powder ejection formation as claimed in claim 2 shoots material, it is characterised in that should be with the poly- of maleic acid anhydride group
The mean molecule quantity of alkene is 90,000 to 110,000.
4. powder ejection formation as claimed in claim 1 is shot material, it is characterised in that the sinterable powder is selected from by metal powder
In the group that end, metal alloy powders, metal-carbonyl powder, ceramic powders and combinations thereof are formed.
5. powder ejection formation as claimed in claim 1 shoots material, it is characterised in that the chloroflo is paraffin and the rheology modifying agent
For palm wax.
6. powder ejection formation as claimed in claim 1 shoots material, it is characterised in that the interfacial agent is stearic acid.
7. the manufacture method of the powder injection-molded product of a kind of improvement, it is characterised in that comprise the following steps：Will with such as right
Ask the powder ejection formation described in any one of 1 to 6 to shoot material, a raw embryo is made using injection molding method；
The raw embryo is directly subjected to de- ester for 90 to 150 minutes with 600 to 1000 DEG C of heating；And
The raw embryo through de- ester is sintered 120 to 240 minutes at 1200 to 1360 DEG C.
8. a kind of powder injection-molded product of improvement, it is made by manufacture method as claimed in claim 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105125962A TWI628238B (en) | 2016-08-15 | 2016-08-15 | Improved powder injection molding feedstock, product manufactured from the same, and manufacturing method of the product |
| TW105125962 | 2016-08-15 |
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| WO2023021196A1 (en) * | 2021-08-19 | 2023-02-23 | Headmade Materials Gmbh | Binder component for a particulate feedstock compound for use in a shaping and sintering process, particulate feedstock compound, and shaping and sintering process |
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| TWI628238B (en) | 2018-07-01 |
| CN107755702B (en) | 2020-12-11 |
| TW201805363A (en) | 2018-02-16 |
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