CN203944838U - Vacuum degreasing fritting furnace - Google Patents
Vacuum degreasing fritting furnace Download PDFInfo
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- CN203944838U CN203944838U CN201420385380.0U CN201420385380U CN203944838U CN 203944838 U CN203944838 U CN 203944838U CN 201420385380 U CN201420385380 U CN 201420385380U CN 203944838 U CN203944838 U CN 203944838U
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- fritting furnace
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Abstract
The utility model relates to a kind of vacuum degreasing fritting furnace.Its objective is for a kind of simple in structure, easy and simple to handle, degreasing sintered stove that cost is low is provided.The utility model comprises housing, graphite, graphite heating sheet, METAL HEATING PROCESS sheet and acid gas cup.Enclosure interior is provided with graphite, graphite outer wall is provided with graphite heating sheet, and the periphery of graphite heating sheet is provided with heat insulation layer, is the 3rd cavity between heat insulation layer and graphite heating sheet, on heat insulation layer outer wall, being provided with METAL HEATING PROCESS sheet, is waterway between METAL HEATING PROCESS sheet and inner walls.Multiple nitrogen input pipes and sour input pipe are installed on housing top, nitrogen input pipe one end is positioned at hull outside, and the other end is communicated with the 3rd cavity, and sour input pipe one end is positioned at hull outside, the other end and graphite internal communication are provided with acid vaporization cup in graphite below sour input pipe.Housing lower end is provided with gas outlet pipe, gas outlet pipe one end and graphite internal communication, and the other end is positioned at hull outside.
Description
Technical field
The utility model relates to powder metallurgy injection member degreasing plant technical field, particularly relates to a kind of vacuum degreasing fritting furnace.
Background technology
Metal Injection Molding (MIM) is multidisciplinary the interpenetrating and the technology of intersecting such as collection plastics molding process, polymer chemistry, powder metallurgy technology and Metal Material Science, utilizes mould can disposal molding to go out the product of complicated shape.This technology is invented last century (1973) by California, USA Parmatech company at first, and early eighties is in state's extensive uses such as American-European and Japan.This technology have advantages of step few, without cutting or a small amount of cutting, and can overcome the defects such as traditional powder metallurgical technique extrudate density is low, material is inhomogeneous, mechanical and physical performance is poor.
Metal powder injection molding is by adding binding agent to realize, and binding agent adopts polyformaldehyde (POM) more, by giving metal dust sufficient mobility by polyformaldehyde binding agent, thereby make metal dust form the blank with specific products feature, blank removes by follow-up degreasing process the polyformaldehyde binding agent previously having added, in the time removing polyformaldehyde binding agent, normally taking nitric acid or other organic acids as catalyst, then obtain having the product of metal or ceramic performance through high temperature sintering.Present stage, be all in stove is quenched in acid by after polyformaldehyde binder decomposed, then the product of first one-step forming is moved on in sintering furnace, the burning of carrying out residual polyformaldehyde binding agent goes out the sintering densification with product.But owing to just dividing the product strength step-down of taking off polyformaldehyde binding agent, there will be the cracked phenomenon of product at the stove of quenching from acid to marching into the arena the moving process of sintering furnace, and cause unnecessary loss, greatly increase production cost.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of simple in structure, vacuum degreasing fritting furnace that cost is low, easy and simple to handle.
The utility model vacuum degreasing fritting furnace, wherein: comprise housing, graphite, graphite heating sheet, METAL HEATING PROCESS sheet and acid gas cup, be provided with inside in the centre position of enclosure interior and offer the graphite of the second cavity, on the outer wall of graphite, be provided with graphite heating sheet, periphery at graphite heating sheet is provided with heat insulation layer, it between heat insulation layer and graphite heating sheet, is the 3rd cavity, on the outer wall of heat insulation layer, be provided with METAL HEATING PROCESS sheet, it between METAL HEATING PROCESS sheet and inner walls, is waterway, be provided with multiple nitrogen input pipes on housing top, one end of nitrogen input pipe is positioned at hull outside, the other end is communicated with the 3rd cavity, also be provided with multiple sour input pipes on housing top, one end of acid input pipe is positioned at hull outside, the other end is communicated with the second cavity, in the second cavity, below every sour input pipe, be all provided with an acid vaporization cup, be provided with gas discharge header in housing lower end, gas discharge header one end is communicated with the second cavity bottom, the other end is positioned at hull outside, in the gas discharge header bottom that is positioned at hull outside, the first gas pump is installed, on the gas discharge header that is positioned at hull outside, be connected with gas exhaust outlet, gas exhaust outlet one end is communicated with gas discharge header, the other end is provided with igniter, the second gas pump is installed on gas exhaust outlet.
The utility model vacuum degreasing fritting furnace, wherein said housing is the cylindrical structural of vertically placing.
The utility model vacuum degreasing fritting furnace, wherein said METAL HEATING PROCESS sheet surface is provided with plastic foil.
The utility model vacuum degreasing fritting furnace, wherein said multiple nitrogen input pipes are all positioned at the outside on housing top, and multiple sour input pipes are all positioned at the middle part on housing top.
The utility model vacuum degreasing fritting furnace, wherein said acid vaporization cup is the disc-shaped structure of horizontal positioned, offers groove on the top of acid vaporization cup.
The utility model vacuum degreasing fritting furnace, the wherein said gas discharge header bottom that is positioned at hull outside is also provided with the first pressure-regulating valve.
The utility model vacuum degreasing fritting furnace, is also provided with the second pressure-regulating valve on wherein said gas exhaust outlet.
The utility model vacuum degreasing fritting furnace, wherein said heat insulation layer is graphite heat insulation layer.
The utility model vacuum degreasing fritting furnace difference from prior art is: the utility model is simple in structure, operation principle is ingenious, cost is low, degreasing sintered effective.To pass into nitric acid or other organic acids in pyrographite box, after nitric acid or other organic acid high-temperature evaporations, react with polyformaldehyde binding agent and generate formaldehyde, after being discharged, lights in formaldehyde, and protection of the environment, has avoided the harm of formaldehyde to human body.Removing after polyformaldehyde binding agent, the temperature of graphite inside is increased to more than 1300 DEG C, product carries out sintering densification.Two processes of sloughing polyformaldehyde binding agent and sintering are completed in a degreasing sintered stove, and there is the phenomenon of cracked damage in the product that has greatly lowered first one-step forming, avoided unnecessary loss in moving process, saved production cost.
Below in conjunction with accompanying drawing, the utility model vacuum degreasing fritting furnace is described further.
Brief description of the drawings
Fig. 1 is the elevational cross-sectional view of the utility model vacuum degreasing fritting furnace;
Fig. 2 is the vertical view cutaway drawing of the utility model vacuum degreasing fritting furnace.
Detailed description of the invention
As shown in Figure 1 and Figure 2, be the utility model vacuum degreasing fritting furnace, comprise housing 17, graphite 1, graphite heating sheet 18, METAL HEATING PROCESS sheet 4 and acid gas cup 6.Housing 17 is the cylindrical structural of vertically placing, and housing 17 inside offer the first cavity.Be provided with the graphite 1 that cuboid inside offers the second cavity 16 in the centre position of the first cavity, on the outer wall of graphite 1, be provided with graphite heating sheet 18, be provided with graphite heat insulation layer 3 in the periphery of graphite heating sheet 18, between graphite heat insulation layer 3 and graphite heating sheet 18, be provided with the 3rd cavity 2, on the outer wall of graphite heat insulation layer 3, be provided with METAL HEATING PROCESS sheet 4, METAL HEATING PROCESS sheet 4 surfaces are provided with not the plastic foil with acid reaction, between plastic foil and housing 17 inwalls, are provided with waterway 5.Outside on housing 17 tops is along the circumferential direction provided with multiple nitrogen input pipes 8 uniformly, one end of nitrogen input pipe 8 is positioned at housing 17 outsides, and the other end extend in the 3rd cavity 2 through housing outer wall, plastic foil, METAL HEATING PROCESS sheet 4 and graphite heat insulation layer 3 successively.At the middle part on housing 17 tops, multiple sour input pipes 7 are installed, one end of acid input pipe 7 is communicated with housing 17 is outside, the other end extend in the second cavity 16 through the outer wall of housing outer wall, plastic foil, METAL HEATING PROCESS sheet 4, graphite heat insulation layer 3, graphite heating sheet 18 and graphite 1 successively, the disc acid vaporization cup 6 that is all provided with a horizontal positioned in the second cavity 16 below every sour input pipe 7, the top of acid vaporization cup 6 offers groove.Be provided with gas discharge header 9 in housing 17 lower ends, gas discharge header 9 one end are communicated with the bottom of the second cavity 16 through the outer wall of housing 17 outer walls, plastic foil, METAL HEATING PROCESS sheet 4, graphite heat insulation layer 3, graphite heating sheet 18 and graphite successively, the other end is positioned at housing 17 outsides, is separately installed with the first gas pump 14 and the first pressure-regulating valve 15 in gas discharge header 9 bottoms that are positioned at housing 17 outsides.Be connected with gas exhaust outlet 10 on gas discharge header 9 tops that are positioned at housing 17 outsides, gas exhaust outlet 10 one end are communicated with gas discharge header 9, the other end is provided with igniter 11, and the second gas pump 12 and the second pressure-regulating valve 13 are installed on gas exhaust outlet 10.
The course of work of the present utility model is: first in the second cavity 16, put into the product of not sloughing polyformaldehyde binding agent, and fill nitric acid or other organic acids in waterway 5, graphite heating sheet 18 and METAL HEATING PROCESS sheet 4 heat simultaneously.The object of heating graphite heating sheet 18 is the temperature in order to raise in the second cavity 16, makes the temperature in the second cavity 16 reach nitric acid or other organic acid evaporation points.The object of heating of metal heating plate 4 is to fill nitric acid or other organic acid temperature in order to improve in waterway 5, prevents that the too low nitric acid of temperature or other organic acids from condensing.In the time that temperature reaches 83 DEG C of left and right, in the 3rd cavity 2, be filled with nitrogen by nitrogen input pipe 8, the second gas pump 12 and the second pressure-regulating valve 13 are opened simultaneously, the first gas pump 14 and the first pressure-regulating valve 15 are closed, the second gas pump 12 is discharged original gas in the second cavity 16, can be by sour input pipe 7 nitric acid or other organic acids to the heating in waterway 5, also the nitric acid in waterway 5 or other organic acids can be input in the second cavity 16 by sour input pipe 7, the nitric acid or other organic acids that are input in the second cavity 16 flow in sour input pipe 7 acid vaporization cup 6 below.When temperature reaches 100 DEG C of left and right, the nitric acid of vaporization or other organic acids react with polyformaldehyde binding agent and generate formaldehyde, and under the effect of the second gas pump 12, formaldehyde is discharged to sintering furnace outside and is lighted by gas exhaust outlet 10.When temperature reaches more than 150 DEG C remaining other impurity and organic matter can be vaporized, now the second gas pump 12 and the second pressure-regulating valve 13 are closed, the first gas pump 14 and the first pressure-regulating valve 15 are opened, other impurity and organic matter are discharged to sintering furnace outside by gas discharge header 9, and to processing after other impurity and organic matter condensation.In whole process, be in order to prevent that the gas in the second cavity 16 from externally permeating to being filled with nitrogen in the 3rd cavity 2, the nitrogen being filled with in effect the 3rd cavity 2 due to pressure can be penetrated in the second cavity 16, but because nitrogen is inert gas, therefore can not exert an influence to reaction.After degreasing sintered process completes, stop graphite heating sheet and METAL HEATING PROCESS sheet 4 to heat, the nitric acid in waterway 5 or other organic acids are discharged, in waterway 5, inject cooling water, carry out cooling to sintering furnace.
The utility model vacuum degreasing fritting furnace; to pass into nitric acid or other organic acids in pyrographite box 1, after nitric acid or other organic acid high-temperature evaporations, react with polyformaldehyde binding agent and generate formaldehyde, after being discharged, lights in formaldehyde; protection of the environment, has avoided the harm of formaldehyde to human body.After removing polyformaldehyde binding agent, the temperature of graphite 1 inside is increased to more than 1300 DEG C, product carries out sintering densification.Two processes of sloughing polyformaldehyde binding agent and sintering are completed in a degreasing sintered stove, and there is the phenomenon of cracked damage in the product that has greatly lowered first one-step forming, avoided unnecessary loss in moving process, saved production cost.The utility model is simple in structure, operation principle is ingenious, cost is low, degreasing sintered effective, compared with prior art there is obvious advantage.
Above-described embodiment is described preferred embodiment of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that those of ordinary skill in the art make the technical solution of the utility model, all should fall in the definite protection domain of the utility model claims.
Claims (8)
1. a vacuum degreasing fritting furnace, it is characterized in that: comprise housing (17), graphite (1), graphite heating sheet (18), METAL HEATING PROCESS sheet (4) and acid gas cup (6), the centre position inner at housing (17) is provided with the graphite (1) that inside offers the second cavity (16), on the outer wall of graphite (1), be provided with graphite heating sheet (18), be provided with heat insulation layer (3) in the periphery of graphite heating sheet (18), it between heat insulation layer (3) and graphite heating sheet (18), is the 3rd cavity (2), on the outer wall of heat insulation layer (3), be provided with METAL HEATING PROCESS sheet (4), between METAL HEATING PROCESS sheet (4) and housing (17) inwall, be waterway (5), be provided with multiple nitrogen input pipes (8) on housing (17) top, one end of nitrogen input pipe (8) is positioned at housing (17) outside, the other end is communicated with the 3rd cavity (2), also be provided with multiple sour input pipes (7) on housing (17) top, one end of acid input pipe (7) is positioned at housing (17) outside, the other end is communicated with the second cavity (16), in the second cavity (16), below every sour input pipe (7), be all provided with an acid vaporization cup (6), be provided with gas discharge header (9) in housing (17) lower end, gas discharge header (9) one end is communicated with the second cavity (16) bottom, the other end is positioned at housing (17) outside, in gas discharge header (9) bottom that is positioned at housing (17) outside, the first gas pump (14) is installed, on the gas discharge header (9) that is positioned at housing (17) outside, be connected with gas exhaust outlet (10), gas exhaust outlet (10) one end is communicated with gas discharge header (9), the other end is provided with igniter (11), the second gas pump (12) is installed on gas exhaust outlet (10).
2. vacuum degreasing fritting furnace according to claim 1, is characterized in that: the cylindrical structural of described housing (17) for vertically placing.
3. vacuum degreasing fritting furnace according to claim 1, is characterized in that: described METAL HEATING PROCESS sheet (4) surface is provided with plastic foil.
4. vacuum degreasing fritting furnace according to claim 1, it is characterized in that: described multiple nitrogen input pipes (8) are all positioned at the outside on housing (17) top, multiple sour input pipes (7) are all positioned at the middle part on housing (17) top.
5. vacuum degreasing fritting furnace according to claim 1, is characterized in that: described acid vaporization cup (6) is the disc-shaped structure of horizontal positioned, offers groove on the top of acid vaporization cup (6).
6. vacuum degreasing fritting furnace according to claim 1, is characterized in that: described in be positioned at outside gas discharge header (9) bottom of housing (17) the first pressure-regulating valve (15) be also installed.
7. vacuum degreasing fritting furnace according to claim 1, is characterized in that: the second pressure-regulating valve (13) is also installed on described gas exhaust outlet (10).
8. vacuum degreasing fritting furnace according to claim 1, is characterized in that: described heat insulation layer (3) is graphite heat insulation layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385380.0U CN203944838U (en) | 2014-07-14 | 2014-07-14 | Vacuum degreasing fritting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385380.0U CN203944838U (en) | 2014-07-14 | 2014-07-14 | Vacuum degreasing fritting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203944838U true CN203944838U (en) | 2014-11-19 |
Family
ID=51886897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420385380.0U Expired - Fee Related CN203944838U (en) | 2014-07-14 | 2014-07-14 | Vacuum degreasing fritting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203944838U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482756A (en) * | 2014-12-11 | 2015-04-01 | 沈阳恒进真空科技有限公司 | Vertical type vacuum debinding furnace |
| CN109530685A (en) * | 2018-12-29 | 2019-03-29 | 株洲万融新材科技有限公司 | Vacuum degreasing sintered forming method |
| CN110494237A (en) * | 2017-03-28 | 2019-11-22 | 日本电产株式会社 | Vacuum degreasing fritting furnace |
-
2014
- 2014-07-14 CN CN201420385380.0U patent/CN203944838U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482756A (en) * | 2014-12-11 | 2015-04-01 | 沈阳恒进真空科技有限公司 | Vertical type vacuum debinding furnace |
| CN104482756B (en) * | 2014-12-11 | 2016-08-24 | 沈阳恒进真空科技有限公司 | Vertical vacuum debinding furnace |
| CN110494237A (en) * | 2017-03-28 | 2019-11-22 | 日本电产株式会社 | Vacuum degreasing fritting furnace |
| CN110494237B (en) * | 2017-03-28 | 2022-03-08 | 日本电产株式会社 | Vacuum degreasing sintering furnace |
| CN109530685A (en) * | 2018-12-29 | 2019-03-29 | 株洲万融新材科技有限公司 | Vacuum degreasing sintered forming method |
| CN109530685B (en) * | 2018-12-29 | 2021-01-15 | 株洲万融新材科技有限公司 | Vacuum degreasing sintering forming method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20180714 |