CN114351508B - Pulp molding die and pulp molding device - Google Patents
Pulp molding die and pulp molding device Download PDFInfo
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- CN114351508B CN114351508B CN202210077821.XA CN202210077821A CN114351508B CN 114351508 B CN114351508 B CN 114351508B CN 202210077821 A CN202210077821 A CN 202210077821A CN 114351508 B CN114351508 B CN 114351508B
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- 238000000465 moulding Methods 0.000 title claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 26
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000011148 porous material Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000000047 product Substances 0.000 description 13
- 238000007723 die pressing method Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 208000020673 hypertrichosis-acromegaloid facial appearance syndrome Diseases 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to the technical field of pulp molding production, and discloses a pulp molding die and a pulp molding device. The pulp molding device is manufactured by using a pulp molding die, and the production of the molded product of the paper is realized through two process positions. According to the invention, the mould is manufactured by the copper alloy powder metallurgy material, and the drainage drying process of pulp moulding is realized by utilizing the characteristic that the pores of the powder material are uniform and difficult to block.
Description
Technical Field
The invention relates to the technical field of pulp molding production, in particular to a pulp molding die and a pulp molding forming device.
Background
The existing common mould in the pulp moulding industry is a mould with a silk screen, the mould has high cost, long production period, difficult clearance of the mould blocking holes, high frequency of replacing the silk screen, large occupation area of the trimming procedure and high labor cost. In addition, the surface and edges of the finished product produced by the mould with the silk screen are subjected to a plurality of working procedures.
Disclosure of Invention
The invention aims to solve the problems and provide a pulp molding die and a pulp molding forming device, wherein the die is manufactured by copper alloy powder metallurgy materials, and the drainage drying process of pulp molding is realized by utilizing the characteristic that pores of the powder materials are uniform and difficult to block.
The technical scheme adopted by the invention is as follows:
the pulp molding die of the copper alloy powder metallurgy material is characterized by comprising a female die and a male die, wherein a die cavity in the shape of a paper product is formed between the female die and the male die when the female die and the male die are matched, the female die and the male die are formed by pressing the copper alloy powder metallurgy material, the copper alloy powder comprises 7-9% of tin, 2-4% of zinc, not more than 0.2% of lead, 0.05-0.3% of phosphorus and the balance copper in percentage by weight, the loose ratio of the copper alloy powder is 4.5-5.5g/cm < 2 >, the flow rate is 14-25s/50g, the impurity content is not more than 1%, and the copper alloy powder is sintered at the temperature of 800-950 ℃ and the pressure of 200-400 MPa.
Further, the copper alloy powder is 40 to 80 mesh.
Further, the female die and the male die each have a thickness, and a cavity is formed below the male die.
The pulp molding forming device of the pulp molding die is characterized by comprising a female die suction plate arranged above and a male die suction plate arranged below, wherein the female die suction plate and the male die suction plate apply pressure to a female die and a male die in the middle, a plurality of suction holes are formed in the male die suction plate of the female die suction plate, the suction holes in the female die suction plate are connected to a vacuumizing device, and the suction holes in the male die suction plate are connected to a liquid discharge hole.
Further, the female die suction plate is fixedly arranged above the female die and is attached to the female die, the male die suction plate is fixedly arranged at the lower part of the cavity below the male die, and the female die suction plate and the female die and the male die suction plate and the female die are fixed through the pressing plate with the half structure.
Further, the female die suction plate and the male die suction plate are respectively fixed through a female die transition plate and a male die transition plate which are arranged up and down, and the female die transition plate and the male die transition plate are positioned through positioning pins.
Further, the female die transition plate and the male die transition plate are respectively provided with a plurality of female die suction plates and male die suction plates, a plurality of female dies and male dies, the female dies and the male dies are arranged according to the size structure of the die table, the central position positions the female die transition plate and the male die transition plate through a central positioning pin, the central position is taken as a reference, and a unitary hole positioning pin is arranged at one direction position of the structure.
Further, copper alloy powder of the female die and the male die is 40 to 60 meshes, the female die suction plate covers the upper surface of the female die, and the male die suction plate is positioned below the male die.
Further, copper alloy powder of the female die and the male die is 60-80 meshes, the female die suction plate covers part of the upper surface of the female die, the male die suction plate is positioned below the male die and covers part of a cavity below the male die, the lower end position of the female die suction plate is flush or staggered with the upper end position of the male die suction plate, and a heating plate is arranged below the male die suction plate.
Further, a nozzle is arranged on the male die suction plate, and the nozzle extends into a cavity at the lower part of the male die.
The beneficial effects of the invention are as follows:
(1) The pore of the powder material is uniform, the pore is not easy to be blocked, and the cleaning is convenient;
(2) The product can be free of a trimming process, can be used for producing products with small angles and small fillets, has more attractive surfaces, and saves labor cost;
(3) The die has a self-cleaning function, the service life is at least 10 times of that of the original die, and the time for cleaning the blocked holes every day by workers is reduced;
(4) The forming device has strong universality, and different products can be produced only by replacing different dies.
Drawings
FIG. 1 is a schematic illustration of a pulp molding die fit;
FIG. 2 is a schematic diagram of the internal crystal phase of a copper alloy powder material;
FIG. 3 is a table of copper alloy powder parameters.
FIG. 4 is a general sectional view of an assembled pulp molding device for press drainage;
FIG. 5 is a general sectional view of an assembled pulp molding device for oven-drying molding;
fig. 6 is a schematic top view of fig. 4 or 5.
The reference numerals in the drawings are respectively:
1. a female die; secondly, a male die;
3. an article; fourth, the female die suction plate;
5. a male die suction plate; sixthly, a female die transition plate;
7. a suction hole; eighthly, a male die transition plate;
9. a mold mounting plate; a center positioning pin;
11. a unitary hole locating pin; sixthly, positioning pins;
13. a male die pressing plate; 14, pressing a die pressing plate;
15. and (3) a nozzle.
Detailed Description
The pulp molding die and the pulp molding device according to the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, pulp molding in the invention is formed by a female die 1 and a male die 2 of copper powder metallurgy material, and a pulp molding product 3 between the female die 1 and the male die 2 is dehydrated, shaped and dried by utilizing the hollow characteristic of the copper powder metallurgy material. For different products 3, the shapes of the female die 1 and the male die 2 correspond to each other, taking the cup-shaped product 3 in fig. 1 as an example, the female die 1 is in a reverse buckle cup shape, the male die 2 is also in a near reverse buckle cup shape, a cavity is arranged below the female die 1 and the male die 2, and equal thicknesses are arranged for uniform drainage and steam. When the upper surface of the male die 2 is matched with the lower surface of the female die 1, a pulp molding cavity is formed in the middle.
Referring to fig. 2, the copper powder metallurgy material of the invention can be proportioned according to Q/HRZ01-2017 standard to prepare copper alloy powder with the brand of FQSn8-3, and the main component contents of the copper alloy powder are as follows by weight percent: tin content: 7-9%, zinc content: 2-4%, lead content: less than or equal to 0.2%, phosphorus content: 0.05-0.3%, and the balance copper. The powder loose ratio is 4.5-5.5g/cm2, the flow rate is 14-25s/50g, and the impurity content is less than or equal to 1%. Some other chemical components can be added: such as molybdenum or other materials to increase the mechanical strength of the material. The pulp mould is formed by sintering a powder metallurgy mould at the temperature of 800-950 ℃ and the pressure of 200-400MPa, the shapes of a female mould 1 and a male mould 2 in the figure 1 are formed, the preset precision is achieved, and a middle mould cavity of the female mould 1 and the male mould 2 is used for placing a pulp mould. The spheres shown in fig. 2 are spherical metal spheres formed by copper and other metal particles at high temperature, fine gaps are formed among the metal spheres, the gap sizes are different from tens of micrometers to hundreds of micrometers, different pore sizes are formed, and the copper alloy powder material can be divided into 40-100 meshes according to different powder particle sizes. The low mesh number can drain the water in the middle pulp mould more quickly, and the high mesh number is used for volatilizing steam during drying.
Referring to the table in fig. 3, different particle size compositions formed different mesh numbers of materials. The female die 1 and the male die 2 of the present invention are manufactured under specific temperature and pressure conditions.
After the pulp molding die is provided, the die is arranged on a customized molding device, and the process steps of squeezing and drying the pulp molding are completed.
Referring to fig. 4, the pulp molding device of the wringing process comprises a female die suction plate 4 arranged above and a male die suction plate 5 arranged below, wherein a female die 1 is arranged below the female die suction plate 4 through a haff structure, and the female die suction plate 4 is arranged below a female die transition plate 6. The female die suction plate 4 covers the upper surface of the female die 1, a plurality of suction holes 7 are formed in the female die suction plate 4, the lower ends of the suction holes 7 are attached to the upper surface of the female die 1, and the upper ends of the suction holes 7 are connected to a vacuumizing device through a channel.
The male die 2 is arranged above the male die suction plate 5 through a haffr structure, and the male die suction plate 5 is arranged on the male die transition plate 8. The male die suction plate 5 is arranged at the bottom of the male die 2, a plurality of suction holes 7 are also formed in the male die suction plate 5, the upper ends of the suction holes 7 are communicated to a cavity below the male die 2, and the lower ends of the suction holes 7 are connected to liquid draining holes.
In the water squeezing process, a powder material mould with 40-60 meshes is used, which is beneficial to faster water drainage. The whole forming device is arranged on a die mounting plate 9 for fixing, a water outlet is also formed in the die mounting plate 9 and communicated with the tanks with different functions, and the die mounting plate 9 fixes and bears the weight of the die.
Referring to fig. 4 and 5, a plurality of sets of dies are used for simultaneous operation, a plurality of die suction plates 4 and die suction plates 5, four dies 1 and dies 2 are respectively arranged on a die transition plate 6 and a die transition plate 8, the dies 1 and dies 2 are arranged according to the size structure of a die table, the die transition plate 6 and the die transition plate 8 are positioned at the central position through a central positioning pin 10, and a unitary hole positioning pin 11 is arranged at one direction position of the structure and used for guiding the direction of thermal expansion and taking the center as a reference.
With continued reference to fig. 4, the pulp molding device of the wringing process is installed and operated as follows:
the male die transition plate 8 and the die mounting plate 9 are locked by bolts and spring washers. The male die suction plate 5 and the male die 2 are positioned by a positioning pin 12, and then a male die pressing plate 13 with a Harvard structure is covered and locked by a screw and a spring pad.
The female die 1 is firstly fixed with the female die suction plate 4 by using screws and elastic pads, then is closed with the female die 1, and then is locked with the female die transition plate 6 by using screws and elastic pads by using the female die pressing plate 14 with a half structure. The female die transition plate 6 and the forming movable die table (not shown) are locked by fasteners such as screws, elastic pads, nuts and the like, so that the locking of the female die 1 is ensured.
In the shaping process, the male die 2 absorbs plant fibers to the male die 2 through a vacuum pump, redundant water is discharged from the male die 2 to the male die suction plate 5 and taken away by the suction holes 7, redundant water is discharged to a pulping pool (not shown) through a die mounting plate 9, then the female die 1 is moved downwards to be matched with the male die 2 through a gas-liquid pressurizing cylinder (not shown) and pressurized, redundant water is extruded again, the water is pumped to a steam-water separator (not shown) through a vacuum pump, the steam-water separator (not shown) is placed in a white water pool (not shown), the female die 1 is moved upwards, the female die suction plate 4 is vacuumized, and compressed air is blown by the male die suction plate 5, so that semi-finished products are transferred from the male die 2 to the female die 1, and the procedure is completed.
The female die 1 and the male die 2 adopt 40-60 mesh copper alloy powder with filtering precision to carry out vacuumizing and quick drainage, and then the copper alloy powder is extruded by a gas-liquid pressurizing cylinder to realize twice drainage, so that the aim of low water content is fulfilled, and the energy consumption of a heating system during drying of a product 3 is reduced. The female die 1 and the male die 2 are respectively fixed with the sleeve by adopting a cylindrical central positioning pin 10 and a prismatic unitary hole positioning pin 11, so that the precision of the die during each die assembly is ensured, and the contact area with the prismatic pin is reduced. Not only can the positioning requirement be met, but also the clamping phenomenon caused by the precision problem can be prevented.
In order to realize the trimming-free process, the male die pressing plate 13 is in clearance fit with the cup body part of the female die 1, so that the fibers are prevented from being extruded into the edge of a product. In order to realize smooth transfer, the hole with the diameter of the suction hole on the concave die suction plate 4 is set to be phi 2 for vacuum suction.
Referring to fig. 6, the pulp molding device of the drying process has the same structure as that of the wringing process, and the mold is made of 60-80 mesh powder material. The female die suction plate 4 covers part of the upper surface of the female die 1, the male die suction plate 5 is positioned below the male die 2 and covers part of the cavity below the male die 2, and the lower end position of the female die suction plate 4 is flush or staggered with the upper end position of the male die suction plate 5. A heating plate (not shown) is arranged above the female die suction plate 4 and below the male die suction plate 5, and provides a heating function for the drying process. The punch suction plate 5 is also provided with a nozzle 15, the nozzle 15 extends into a cavity at the lower part of the punch 2, and after compressed air is pressed in, the die can be washed.
In the same way, a plurality of dies are used for simultaneous operation, the female die transition plate 6 and the male die transition plate 8 are respectively provided with four female die suction plates 4 and male die suction plates 5, a plurality of female dies 1 and male dies 2, the female dies 1 and the male dies are arranged according to the size structure of a die table, the central position is used for positioning the female die transition plate 6 and the male die transition plate 8 through the central positioning pin 10, and the unitary hole positioning pin 11 is arranged at one direction position of the structure, so that the problem of thermal expansion and cold contraction after heating in a drying process can be solved, and the die clamping phenomenon caused by thermal expansion and cold contraction of the dies can be prevented.
The specific pulp molding device of the drying process is installed and operated as follows:
the male die transition plate 8 is locked with the lower heating plate (not shown) through a screw spring pad, lower heat is transferred through the male die suction plate 5 and the male die 2 to dry the product 3, the female die 1 moves downwards through a gas-liquid pressurizing cylinder (not shown) and is pressurized, so that extruded water is pumped away from the suction hole 7 of the male die suction plate 5, steam is taken away from the hole of the suction hole 7 of the female die suction plate 4, another part of steam is taken out from the hole of the die between the female die suction plate 4 and the male die pressing plate 13, and a vacuum suction upper cover can be installed on a forming machine to take away another part of heat.
In order to ensure the mounting position accuracy of the male die 2 and the male die transition plate 8, positioning pins are used for positioning, and a male die pressing plate 13 is used for pressing the lock by screws.
The female die transition plate 6 is (slightly) connected with a heating plate of the female die 1 through bolts and elastic pads, the heating plate transmits heat to the female die suction plate 4, and then the female die suction plate 4 and the female die 1 are locked through the elastic pads of bolts to transmit heat to the product 3, so that the heating of the female die 1 and the product 3 is realized.
The generated vapor after the female die 1 is heated is taken away by vacuum suction through the air holes of the female die suction plate 4, thereby realizing drying. The female die pressing plate 14 and the female die transition plate 6 are locked by screws and elastic pads, and the female die suction plate 4 and the female die 1 are fixed on the female die transition plate 6. The female die 1 and the male die 2 penetrate into the sleeve through cylindrical pins to perform die assembly positioning.
The concave-convex mould sucking plate has the function of sucking water vapor and the function of heat transfer, so that the water passing quantity can be ensured as much as possible, the compactness is ensured to increase the mechanical strength and the heat transfer efficiency of the mould, and meanwhile, in order to reduce the energy consumption, the aluminum alloy is adopted, so that the quick sucking and transferring can be ensured, a lot of materials are not removed to reduce the heat transfer, and the drying time is prolonged when the concave-convex mould transition plate is manufactured.
To prevent the mould from blocking the holes, we have mounted nozzles 15 on the punch suction plate 5. After each shift is finished, the nozzle 15 is opened for back blowing, and the die is cleaned, so that the self-cleaning function of the die is achieved, and the service life of the die is prolonged.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A pulp molding die of copper alloy powder metallurgy material is characterized in that: the copper alloy powder is prepared by sintering copper alloy powder which comprises 7-9% of tin, 2-4% of zinc, not more than 0.2% of lead, 0.05-0.3% of phosphorus and the balance copper according to weight percentage, wherein the loose ratio of the copper alloy powder is 4.5-5.5g/cm < 2 >, the flow rate is 14-25s/50g, the impurity content is not more than 1%, and the copper alloy powder is sintered at 800-950 ℃ and under 200-400 MPa.
2. The pulp molding die of copper alloy powder metallurgy material according to claim 1, wherein: the female die and the male die are both provided with a thickness, and a cavity is formed below the male die.
3. Pulp molding device using the pulp molding die according to any one of claims 1 to 2, characterized in that: the female die suction plate and the male die suction plate are arranged above the female die suction plate, the female die suction plate and the male die suction plate exert pressure on the female die and the male die in the middle, a plurality of suction holes are formed in the male die suction plate of the female die suction plate, the suction holes in the female die suction plate are connected to a vacuumizing device, the suction holes in the male die suction plate are connected to a liquid discharging hole, the female die suction plate is fixedly arranged above the female die and is attached to the female die, the male die suction plate is fixedly arranged at the lower part of a cavity below the male die, and the female die suction plate and the female die are fixed through a pressing plate with a French structure.
4. A pulp moulding apparatus according to claim 3, wherein: the female die suction plate and the male die suction plate are respectively fixed through a female die transition plate and a male die transition plate which are arranged up and down, and the female die transition plate and the male die transition plate are positioned through positioning pins.
5. The pulp molding device as defined in claim 4, wherein: the die transition plate and the male die transition plate are respectively provided with a plurality of die suction plates and male die suction plates, a plurality of dies and male dies, the dies and the male dies are arranged according to the size structure of the die table, the center positions of the dies and the male die transition plate are positioned by the center positioning pins, the center positions are taken as the reference, and a unitary hole positioning pin is arranged at one direction position of the structure.
6. The pulp molding device according to any one of claims 3 to 5, characterized in that: the copper alloy powder of the female die and the male die is 40-60 meshes, the female die suction plate covers the upper surface of the female die, and the male die suction plate is positioned below the male die.
7. The pulp molding device according to any one of claims 3 to 5, characterized in that: the copper alloy powder of the female die and the male die is 60-80 meshes, the female die suction plate covers part of the upper surface of the female die, the male die suction plate is positioned below the male die and covers part of the cavity below the male die, the lower end position of the female die suction plate is flush or staggered with the upper end position of the male die suction plate, and a heating plate is arranged below the male die suction plate.
8. The pulp molding device of claim 7, wherein: and a nozzle is arranged on the male die suction plate and extends into a cavity at the lower part of the male die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210077821.XA CN114351508B (en) | 2022-01-24 | 2022-01-24 | Pulp molding die and pulp molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210077821.XA CN114351508B (en) | 2022-01-24 | 2022-01-24 | Pulp molding die and pulp molding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114351508A CN114351508A (en) | 2022-04-15 |
| CN114351508B true CN114351508B (en) | 2024-01-30 |
Family
ID=81090472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210077821.XA Active CN114351508B (en) | 2022-01-24 | 2022-01-24 | Pulp molding die and pulp molding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114351508B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10131100A (en) * | 1996-11-01 | 1998-05-19 | Nippon Matai Co Ltd | Mold for pulp molding and production of pulp molding product by using the same |
| JPH1136200A (en) * | 1997-07-14 | 1999-02-09 | Nippon Haipatsuku Kk | Pulp molded product, production of pulp molded product and apparatus for producing pulp molded product |
| CN1271796A (en) * | 1999-04-22 | 2000-11-01 | 苏炳龙 | Hot-press die made up by copper-base powder metallurgy for making paper-pulp dining set |
| KR100427604B1 (en) * | 2003-11-22 | 2004-04-28 | 이범우 | Pulp Mold Machine |
| RU2319760C1 (en) * | 2006-06-14 | 2008-03-20 | Юлия Алексеевна Щепочкина | Copper-base sintered alloy |
| CN101696478A (en) * | 2009-10-23 | 2010-04-21 | 吴棕洋 | Lead-free copper-based alloy powder material and preparation method thereof |
| CN102506074A (en) * | 2011-10-19 | 2012-06-20 | 台州科锦轴承有限公司 | Oil-bearing copper-based powder metallurgy gasket for self-lubricating rod end joint bearing, preparation method and self-lubricating rod end joint bearing |
| CN105690047A (en) * | 2014-12-12 | 2016-06-22 | 金箭印刷事业有限公司 | Method for manufacturing porous metal mold for wet paper-plastic molding process |
| KR20210103798A (en) * | 2020-02-14 | 2021-08-24 | 주식회사풍년그린텍 | Cleaning apparatus of pulp molding manufacturing device |
-
2022
- 2022-01-24 CN CN202210077821.XA patent/CN114351508B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10131100A (en) * | 1996-11-01 | 1998-05-19 | Nippon Matai Co Ltd | Mold for pulp molding and production of pulp molding product by using the same |
| JPH1136200A (en) * | 1997-07-14 | 1999-02-09 | Nippon Haipatsuku Kk | Pulp molded product, production of pulp molded product and apparatus for producing pulp molded product |
| CN1271796A (en) * | 1999-04-22 | 2000-11-01 | 苏炳龙 | Hot-press die made up by copper-base powder metallurgy for making paper-pulp dining set |
| KR100427604B1 (en) * | 2003-11-22 | 2004-04-28 | 이범우 | Pulp Mold Machine |
| RU2319760C1 (en) * | 2006-06-14 | 2008-03-20 | Юлия Алексеевна Щепочкина | Copper-base sintered alloy |
| CN101696478A (en) * | 2009-10-23 | 2010-04-21 | 吴棕洋 | Lead-free copper-based alloy powder material and preparation method thereof |
| CN102506074A (en) * | 2011-10-19 | 2012-06-20 | 台州科锦轴承有限公司 | Oil-bearing copper-based powder metallurgy gasket for self-lubricating rod end joint bearing, preparation method and self-lubricating rod end joint bearing |
| CN105690047A (en) * | 2014-12-12 | 2016-06-22 | 金箭印刷事业有限公司 | Method for manufacturing porous metal mold for wet paper-plastic molding process |
| KR20210103798A (en) * | 2020-02-14 | 2021-08-24 | 주식회사풍년그린텍 | Cleaning apparatus of pulp molding manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114351508A (en) | 2022-04-15 |
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