CN103433492B - Blow molding method for powder of metal hollow product - Google Patents
Blow molding method for powder of metal hollow product Download PDFInfo
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- CN103433492B CN103433492B CN201310364592.0A CN201310364592A CN103433492B CN 103433492 B CN103433492 B CN 103433492B CN 201310364592 A CN201310364592 A CN 201310364592A CN 103433492 B CN103433492 B CN 103433492B
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- 239000000843 powder Substances 0.000 title claims abstract description 81
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 55
- 239000002184 metal Substances 0.000 title claims abstract description 55
- 238000000071 blow moulding Methods 0.000 title claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 53
- 239000011230 binding agent Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 37
- 238000005245 sintering Methods 0.000 claims abstract description 35
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 108
- 239000000463 material Substances 0.000 claims description 33
- 238000010030 laminating Methods 0.000 claims description 32
- 239000012798 spherical particle Substances 0.000 claims description 26
- 239000000314 lubricant Substances 0.000 claims description 20
- 239000001993 wax Substances 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000001746 injection moulding Methods 0.000 claims description 19
- 239000008247 solid mixture Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 230000014759 maintenance of location Effects 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 8
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 235000013871 bee wax Nutrition 0.000 claims description 6
- 239000012166 beeswax Substances 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 15
- 238000007493 shaping process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 235000012424 soybean oil Nutrition 0.000 description 2
- 239000003549 soybean oil Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a forming method of a metal hollow product. The problem that demoulding cannot occur to a special-shaped metal product prepared in the prior art is solved. The method comprises the first step of organic binding agent raw material preparation, the second step of the hot mixing of metal powder and organic binding agent raw material mixtures, the third step of green body preparation, the fourth step of blow molding bulging, the fifth step of demoulding, the sixth step of low-temperature heat treatment and the seventh step of high-temperature pressure-free sintering, and the metal hollow product is obtained. Blow molding is introduced into the metal powder forming process, and the product completeness rate reaches 100% after the demoulding. The method is used for forming the metal hollow product.
Description
Technical field
The present invention relates to the manufacturing process of metal hollow goods.
Background technology
In recent years, along with the development of science and technology, the demand of hollow product is got more and more, the material of hollow product extends to metal or ceramic material by plastics gradually, can be obtained for plastic hollow goods by blow molding method, and metal hollow goods often adopt the techniques such as casting, superplastic forming, Combination Welding to obtain, above process costs is high, efficiency is low, in addition, the metal material high for some fusing points, plasticity is poor, above technique is also no longer applicable.Traditional powder injection or extrusion molding can obtain the hollow product of some simple shapes efficiently, be very suitable for some refractory metal materials simultaneously, particular/special requirement is not had to the plasticity of material yet, but often cannot the demoulding for more than some special-shaped hollow products two kinds of technique, therefore no longer applicable, be badly in need of the demand that a kind of new and effective forming technology of exploitation meets various metal hollow goods.
In sum, in traditional profiled metal hollow product technique, goods are formed by die and the mold pressing of punch two parts mould, goods after shaping, punch cannot be deviate from from goods, deviates to cause product breakage rate to reach 100%(as shown in Figure 1 by force), therefore, existence cannot release problems.
Summary of the invention
The present invention will solve that the profiled metal hollow product prepared in prior art exists cannot release problems, and provides the powder blow molding method of metal hollow goods.
The powder blow molding method of metal hollow goods, carries out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in injection machine by the spherical particle prepared in step 2, prepare base substrate by injection moulding, plasticization temperature is 100 DEG C-310 DEG C, injection pressure is 20MPa-250MPa, dwell pressure 10MPa-160MPa, the dwell time is 1s-15s, obtains base substrate;
Four, blowing bulging: the base substrate die change of injection moulding is become die, then pass into gas in base substrate, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
The powder blow molding method of metal hollow goods, carries out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in extruder by the spherical particle prepared in step 2, prepare base substrate by extrusion molding, plasticization temperature 80 DEG C-280 DEG C, extruded velocity 50r/min-550r/min, obtains base substrate;
Four, blowing bulging: directly pass into gas in the base substrate of extrusion molding, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
The invention has the beneficial effects as follows: blow molding is introduced in shaping of metal powders process by the present invention, base substrate is prepared by injection or extrusion molding, by the base substrate demoulding, be used alone matrix mould again, gas is passed in the base substrate after the demoulding, base substrate and die are fitted completely, the use of punch is avoided in product molding process, therefore, die moves left and right and namely realizes die sinking, goods can be deviate from smoothly, and after the demoulding, product serviceability rate reaches 100%(as shown in Figure 2), solving profiled metal hollow product cannot the problem of the demoulding in powder injection or extrusion molding.
Accompanying drawing explanation
Fig. 1 is conventional metals hollow product handicraft shaping schematic diagram, and 1 is die, and 2 is goods, and 3 is punch;
Fig. 2 is the powder blow molding method article formation schematic diagram of metal hollow goods, and 1 is die, and 2 is goods.
Detailed description of the invention
Detailed description of the invention one: the powder blow molding method of the metal hollow goods described in present embodiment, carry out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in injection machine by the spherical particle prepared in step 2, prepare base substrate by injection moulding, plasticization temperature is 100 DEG C-310 DEG C, injection pressure is 20MPa-250MPa, dwell pressure 10MPa-160MPa, the dwell time is 1s-15s, obtains base substrate;
Four, blowing bulging: the base substrate die change of injection moulding is become die, then pass into gas in base substrate, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
Fig. 1 is conventional metals hollow product handicraft shaping schematic diagram, and 1 is die, and 2 is goods, and 3 is punch; Fig. 2 is the powder blow molding method article formation schematic diagram of metal hollow goods, and 1 is die, and 2 is goods.Blow molding is introduced in shaping of metal powders process by present embodiment, base substrate is prepared by injection or extrusion molding, by the base substrate demoulding, be used alone matrix mould again, gas is passed in the base substrate after the demoulding, base substrate and die are fitted completely, the use of punch is avoided in product forming process, therefore, die moves left and right and namely realizes die sinking, goods can be deviate from smoothly, after the demoulding, product serviceability rate reaches 100%(as shown in Figure 2), by Fig. 1 and Fig. 2 contrast known present embodiment solve profiled metal hollow product cannot the problem of the demoulding in powder injection or extrusion molding.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: the TPO macromolecular material described in step one is polypropylene or polyethylene; Wax described in step one is paraffin or beeswax; Lubricant described in step one is vegetable oil or stearic acid; The mass ratio of the wax described in step one and TPO macromolecular material is (0.1-0.4): 1; The mass ratio of the lubricant described in step one and TPO macromolecular material is (0.05-0.25): 1.Other is identical with detailed description of the invention one.
Detailed description of the invention three: one of present embodiment and detailed description of the invention one or two unlike: first globular metallic powder is put into banbury in step 2 and is heated to 120 DEG C-200 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 120 DEG C-200 DEG C, the time of heat mixing is 1h-2h, obtains spherical particle; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.6-1); Described globular metallic powder is one or wherein several mixture of powdered steel, titanium powder, niobium powder, tungsten powder, molybdenum powder or cobalt dust, and described globular metallic powder particle diameter is 10 μm-30 μm.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three unlike: in step 3, the spherical particle prepared in step 2 is joined in injection machine, base substrate is prepared by injection moulding, plasticization temperature is 100 DEG C-220 DEG C, injection pressure is 20MPa-200MPa, dwell pressure 10MPa-150MPa, dwell time is 1s-10s, obtains base substrate.Other is identical with detailed description of the invention one to three.
Detailed description of the invention five: present embodiment and one of detailed description of the invention one to four unlike: in step 4, the base substrate die change of injection moulding is become die, gas is passed into again in base substrate, gas pressure controls at 0.5MPa-2MPa, make base substrate generation bulging laminating mould, obtain the bulging base substrate of laminating mould.Other is identical with detailed description of the invention one to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five unlike: in step 6, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-660 DEG C, and the processing time is 10h-25h.Other is identical with detailed description of the invention one to five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention one to six unlike: in step 7, sintering temperature is 800 DEG C-2100 DEG C, and temperature retention time is 1h-2h.Other is identical with detailed description of the invention one to six.
Detailed description of the invention eight: the powder blow molding method of the metal hollow goods described in present embodiment, carry out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in extruder by the spherical particle prepared in step 2, prepare base substrate by extrusion molding, plasticization temperature 80 DEG C-280 DEG C, extruded velocity 50r/min-550r/min, obtains base substrate;
Four, blowing bulging: directly pass into gas in the base substrate of extrusion molding, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
Fig. 1 is conventional metals hollow product handicraft shaping schematic diagram, and 1 is die, and 2 is goods, and 3 is punch; Fig. 2 is the powder blow molding method article formation schematic diagram of metal hollow goods, and 1 is die, and 2 is goods.Blow molding is introduced in shaping of metal powders process by present embodiment, base substrate is prepared by injection or extrusion molding, by the base substrate demoulding, be used alone matrix mould again, gas is passed in the base substrate after the demoulding, base substrate and die are fitted completely, the use of punch is avoided in product forming process, therefore, die moves left and right and namely realizes die sinking, goods can be deviate from smoothly, after the demoulding, product serviceability rate reaches 100%(as shown in Figure 2), by Fig. 1 and Fig. 2 contrast known present embodiment solve profiled metal hollow product cannot the problem of the demoulding in powder injection or extrusion molding.
Detailed description of the invention nine: present embodiment and detailed description of the invention eight unlike: the TPO macromolecular material described in step one is polypropylene or polyethylene; Wax described in step one is paraffin or beeswax; Lubricant described in step one is vegetable oil or stearic acid; The mass ratio of the wax described in step one and TPO macromolecular material is (0.1-0.4): 1; The mass ratio of the lubricant described in step one and TPO macromolecular material is (0.05-0.25): 1.Other is identical with detailed description of the invention eight.
Detailed description of the invention ten: one of present embodiment and detailed description of the invention eight or nine unlike: first globular metallic powder is put into banbury in step 2 and is heated to 120 DEG C-200 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 120 DEG C-200 DEG C, the time of heat mixing is 1h-2h, obtains spherical particle; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.6-1); Described globular metallic powder is one or wherein several mixture of powdered steel, titanium powder, niobium powder, tungsten powder, molybdenum powder or cobalt dust, and described globular metallic powder particle diameter is 10 μm-30 μm.Other is identical with detailed description of the invention eight or nine.
Detailed description of the invention 11: one of present embodiment and detailed description of the invention eight to ten unlike: in step 3, the spherical particle prepared in step 2 is joined in extruder, base substrate is prepared by extrusion molding, plasticization temperature 80 DEG C-200 DEG C, extruded velocity 50r/min-500r/min.Other is identical with detailed description of the invention eight to ten.
Detailed description of the invention 12: one of present embodiment and detailed description of the invention eight to ten one unlike: in the base substrate of extrusion molding, directly pass into gas in step 4, gas pressure controls at 1MPa-2MPa, make base substrate generation bulging laminating mould, obtain the bulging base substrate of laminating mould.Other is identical with detailed description of the invention eight to ten one.
Detailed description of the invention 13: one of present embodiment and detailed description of the invention eight to ten two unlike: in step 6, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-660 DEG C, and the processing time is 10h-25h.Other is identical with detailed description of the invention eight to ten two.
Detailed description of the invention 14: one of present embodiment and detailed description of the invention eight to ten three unlike: in step 7, sintering temperature is 800 DEG C-2100 DEG C, and temperature retention time is 1h-2h.Other is identical with detailed description of the invention eight to ten three.
Following examples are adopted to verify beneficial effect of the present invention:
Embodiment one: the powder blow molding method of metal hollow goods, specifically carry out according to following steps:
One, organic binder bond raw material preparation: polyethylene is mixed with beeswax, obtains solid mixture, then add stearic acid in solid mixture, mix, obtain organic binder bond raw mixture;
Described beeswax and poly mass ratio are 1: 8; Described stearic acid and poly mass ratio are 1: 8;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first 304 stainless steel globular metallic powders are put into banbury and be heated to 160 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 160 DEG C, the time of heat mixing is 1h, obtains spherical particle;
304 described stainless steel globular metallic powder particle diameters are 10 μm-30 μm; 304 described stainless steel globular metallic powders and the volume ratio of organic adhesive raw mixture are 14: 11;
Three, prepare base substrate: join in injection machine by the spherical particle prepared in step 2, prepare base substrate by injection moulding, plasticization temperature is 180 DEG C, and injection pressure is 90MPa, dwell pressure 40MPa, and the dwell time is 3s, obtains base substrate;
Four, blowing bulging: the base substrate die change of injection moulding is become die, then pass into gas in base substrate, gas pressure controls at 0.8MPa-1MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-560 DEG C, and the processing time is 16h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 1100 DEG C, and temperature retention time is 2h, finally obtains metal hollow goods.
The spherical particle that step 2 obtains is leaked by sieve and selects known grain diameter to be 2mm.
It is 98.5% that metal hollow goods prepared by the present embodiment record goods density by Archimedes's drainage.
Embodiment two: the powder blow molding method of metal hollow goods, specifically carry out according to following steps:
One, organic binder bond raw material preparation: polypropylene is mixed with paraffin, obtains solid mixture, then add soybean oil in solid mixture, mix, obtain organic binder bond raw mixture;
Described paraffin and polyacrylic mass ratio are 3: 16; Described soybean oil and polyacrylic mass ratio are 1: 13;
Two, globular metallic powder mixes with the heat of organic adhesive raw mixture: first titanium alloy stainless steel globular metallic powder is put into banbury and be heated to 180 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 180 DEG C, the time of heat mixing is 1.5h, obtains spherical particle;
Described titanium alloy stainless steel globular metallic powder particle diameter is 10 μm-30 μm; Described titanium alloy stainless steel globular metallic powder and the volume ratio of organic binder bond raw mixture are 111: 89;
Three, prepare base substrate: join in extruder by the spherical particle prepared in step 2, prepare base substrate by extrusion molding, plasticization temperature 180 DEG C, extruded velocity 300r/min-400r/min, obtains base substrate;
Four, blowing bulging: directly pass into gas in the base substrate of extrusion molding, gas pressure controls at 1MPa-1.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-660 DEG C, and the processing time is 18h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 1250 DEG C, and temperature retention time is 2h, finally obtains metal hollow goods.
The spherical particle that step 2 obtains is leaked by sieve and selects known grain diameter to be 1.5mm.
It is 98.6% that metal hollow goods prepared by the present embodiment record goods density by Archimedes's drainage.
Claims (10)
1. the powder blow molding method of metal hollow goods, is characterized in that the powder blow molding method of metal hollow goods carries out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in injection machine by the spherical particle prepared in step 2, prepare base substrate by injection moulding, plasticization temperature is 100 DEG C-310 DEG C, injection pressure is 20MPa-250MPa, dwell pressure 10MPa-160MPa, the dwell time is 1s-15s, obtains base substrate;
Four, blowing bulging: the base substrate die change of injection moulding is become die, then pass into gas in base substrate, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
2. the powder blow molding method of metal hollow goods according to claim 1, is characterized in that the TPO macromolecular material described in step one is polypropylene or polyethylene; Wax described in step one is paraffin or beeswax; Lubricant described in step one is vegetable oil or stearic acid; The mass ratio of the wax described in step one and TPO macromolecular material is (0.1-0.4): 1; The mass ratio of the lubricant described in step one and TPO macromolecular material is (0.05-0.25): 1.
3. the powder blow molding method of metal hollow goods according to claim 1, it is characterized in that first globular metallic powder being put into banbury in step 2 is heated to 120 DEG C-200 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 120 DEG C-200 DEG C, the time of heat mixing is 1h-2h, obtains spherical particle; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.6-1); Described globular metallic powder is one or wherein several mixture of powdered steel, titanium powder, niobium powder, tungsten powder, molybdenum powder or cobalt dust, and described globular metallic powder particle diameter is 10 μm-30 μm.
4. the powder blow molding method of metal hollow goods according to claim 1, it is characterized in that in step 3, the spherical particle prepared in step 2 being joined in injection machine, base substrate is prepared by injection moulding, plasticization temperature is 100 DEG C-220 DEG C, injection pressure is 20MPa-200MPa, dwell pressure 10MPa-150MPa, the dwell time is 1s-10s, obtains base substrate.
5. the powder blow molding method of metal hollow goods according to claim 1, it is characterized in that, in step 4, the base substrate die change of injection moulding is become die, gas is passed into again in base substrate, gas pressure controls at 0.5MPa-2MPa, make base substrate generation bulging laminating mould, obtain the bulging base substrate of laminating mould.
6. the powder blow molding method of metal hollow goods, is characterized in that the powder blow molding method of metal hollow goods, carries out according to following steps:
One, organic binder bond raw material preparation: TPO macromolecular material is mixed with wax, obtains solid mixture, then add lubricant in solid mixture, mix, obtain organic binder bond raw mixture;
The mass ratio of described wax and TPO macromolecular material is (0.1-0.5): 1; The mass ratio of described lubricant and TPO macromolecular material is (0.05-0.3): 1;
Two, globular metallic powder mixes with the heat of organic binder bond raw mixture: first globular metallic powder is put into banbury and be heated to 80 DEG C-280 DEG C, add organic binder bond raw mixture again and carry out heat mixing, the temperature of heat mixing is 80 DEG C-280 DEG C, the time of heat mixing is 0.5h-2h, obtains spherical particle;
Described globular metallic powder particle diameter is 1 μm-50 μm; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.54-1.2);
Three, prepare base substrate: join in extruder by the spherical particle prepared in step 2, prepare base substrate by extrusion molding, plasticization temperature 80 DEG C-280 DEG C, extruded velocity 50r/min-550r/min, obtains base substrate;
Four, blowing bulging: directly pass into gas in the base substrate of extrusion molding, gas pressure controls at 0.5MPa-2.5MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould;
Five, the demoulding: the bulging base substrate outer mold of laminating mould is withdrawn from, obtains the hollow member base substrate after the demoulding;
Six, Low Temperature Heat Treatment: by the K cryogenic treatment in vacuum and low temperature heat treatment sintering furnace of the hollow member base substrate after the demoulding, the temperature of Low Temperature Heat Treatment controls at 20 DEG C-670 DEG C, and the processing time is 10h-30h, obtains the forming blank after Low Temperature Heat Treatment;
Seven, high temperature pressure-free sintering: sintered in non-pressure sintering furnace by the forming blank after Low Temperature Heat Treatment, sintering temperature is 800 DEG C-2150 DEG C, and temperature retention time is 1h-3.5h, finally obtains metal hollow goods.
7. the powder blow molding method of metal hollow goods according to claim 6, is characterized in that the TPO macromolecular material described in step one is polypropylene or polyethylene; Wax described in step one is paraffin or beeswax; Lubricant described in step one is vegetable oil or stearic acid; The mass ratio of the wax described in step one and TPO macromolecular material is (0.1-0.4): 1; The mass ratio of the lubricant described in step one and TPO macromolecular material is (0.05-0.25): 1.
8. the powder blow molding method of metal hollow goods according to claim 6, it is characterized in that first globular metallic powder being put into banbury in step 2 is heated to 120 DEG C-200 DEG C, and then add in banbury organic binder bond raw mixture carry out heat mixing, the temperature of heat mixing is 120 DEG C-200 DEG C, the time of heat mixing is 1h-2h, obtains spherical particle; The volume ratio of described globular metallic powder and organic binder bond raw mixture is 1: (0.6-1); Described globular metallic powder is one or wherein several mixture of powdered steel, titanium powder, niobium powder, tungsten powder, molybdenum powder or cobalt dust, and described globular metallic powder particle diameter is 10 μm-30 μm.
9. the powder blow molding method of metal hollow goods according to claim 6, it is characterized in that in step 3, the spherical particle prepared in step 2 being joined in extruder, base substrate is prepared, plasticization temperature 80 DEG C-200 DEG C, extruded velocity 50r/min-500r/min by extrusion molding.
10. the powder blow molding method of metal hollow goods according to claim 6, it is characterized in that in the base substrate of extrusion molding, directly passing into gas in step 4, gas pressure controls at 1MPa-2MPa, makes base substrate generation bulging laminating mould, obtains the bulging base substrate of laminating mould.
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| CN110842206B (en) * | 2019-11-12 | 2021-08-31 | 丹阳市剑庐工具有限公司 | Preparation method of hexagonal high-torque drill shank |
| CN110976885A (en) * | 2019-12-03 | 2020-04-10 | 金上晋科技(深圳)有限公司 | Hollow metal forming process |
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