CN212144497U - Multi-zone temperature control and air inlet device for walking beam type continuous degreasing sintering furnace - Google Patents
Multi-zone temperature control and air inlet device for walking beam type continuous degreasing sintering furnace Download PDFInfo
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- CN212144497U CN212144497U CN202020634359.5U CN202020634359U CN212144497U CN 212144497 U CN212144497 U CN 212144497U CN 202020634359 U CN202020634359 U CN 202020634359U CN 212144497 U CN212144497 U CN 212144497U
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Abstract
The utility model discloses a many districts accuse temperature and air inlet unit for continuous degrease fritting furnace of walking beam formula relates to powder metallurgy injection moulding technical field, including setting up in last thermocouple and last intake pipe at fritting furnace sintering section top and setting up in lower thermocouple and the lower intake pipe of fritting furnace sintering section both sides lower part, the inside both sides that are located the material boat of fritting furnace sintering section still are provided with the molybdenum heating member. And (3) independently arranging heating bodies at the upper part and the lower part of the single area, and independently heating and controlling the upper temperature and the lower temperature of the single area. For a sintering furnace with large yield, the size deviation caused by different gas states is corrected by controlling the temperature up and down and modifying the temperature. The arrangement of the air inlet device leads clean hydrogen atmosphere to be directly introduced into the bottom and the upper part of the molybdenum heater, so that the carbon atmosphere is not easy to deposit, the molybdenum heater is protected, the upper atmosphere and the lower atmosphere in the furnace are adjusted, and the difference of sintering performances of products at the upper part and the lower part of the material boat is reduced. The air inlet hole is shared with the original thermocouple hole, so that the temperature control of the thermocouple is realized, air inlet is realized, and the air inlet holes are reduced.
Description
Technical Field
The utility model relates to a powder metallurgy injection moulding technical field especially relates to a multizone accuse temperature and air inlet unit for walking beam formula continuous degreasing sintering stove.
Background
The walking beam type continuous degreasing sintering furnace is used for metal powder injection molding.
The metal powder injection molding introduces the modern plastic injection molding technology into the field of powder metallurgy to form a novel powder metallurgy near-net shape molding technology.
The metal powder injection molding is a new process combining the traditional powder metallurgy process and the plastic molding process, integrates the cross products of multiple subjects such as plastic molding technology, polymer chemistry, powder metallurgy technology, metal material science and the like, can quickly manufacture structural parts with high density, high precision and complex shapes by utilizing the injection molding of a mold, can quickly and accurately convert the design idea into products with certain structure and functional characteristics, can directly produce parts in batches, and is a new revolution in the manufacturing technology industry. The injection mechanism is as follows: the mixture of metal powder and binder is injected into a die cavity at a certain temperature, speed and pressure by an injection machine, the die cavity is cooled, shaped and removed to obtain a prefabricated part with a certain shape and size, and then the binder in the prefabricated part is removed and sintered to obtain a finished part with certain mechanical properties. The forming process flow is as follows: 1. mixing metal powder and a binder, 2, forming, 3, degreasing, 4, sintering, 5, post-processing and 6, and obtaining a finished product.
Among them, degreasing and sintering are the most critical steps. Degreasing is a process of removing the binder contained in the body of the formed body before sintering. The degreasing process must ensure that the binder is gradually expelled from the various portions of the compact along the tiny channels between the particles without compromising the high strength of the formed compact. Sintering can shrink and densify the porous degreased blank into a product with certain structure and performance.
In order to meet the increasing demand, the larger the furnace is, the higher the yield is, and the stability problem of the product is more and more obvious, which is mainly reflected in that the sintering temperature deviation of the upper part and the lower part in the same material boat is larger, thereby reflecting that the size deviation of the upper layer product and the lower layer product is larger, and the sintering yield of the product is low.
Disclosure of Invention
For solving above technical problem, the utility model provides a many districts accuse temperature and air inlet unit for continuous degrease fritting furnace of walking beam formula to solve the problem that the heater life-span is short that upper and lower floor temperature is uneven and atmosphere is uneven and carbon deposition arouses on the sintered product.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a multizone accuse temperature and air inlet unit for continuous degrease fritting furnace of walking beam formula, including setting up in last thermocouple and last intake pipe at fritting furnace sintering section top and setting up in lower thermocouple and lower intake pipe of fritting furnace sintering section both sides lower part, the inside both sides that are located the material boat of fritting furnace sintering section still are provided with the molybdenum heating body.
Optionally, an upper mounting hole is formed in the top of the sintering section of the sintering furnace, lower mounting holes are formed in the lower portions of two sides of the sintering section of the sintering furnace, the upper thermocouple and the upper air inlet pipe are both arranged in the upper mounting hole, and the lower thermocouple and the lower air inlet pipe are both arranged in the lower mounting hole.
Optionally, a through channel is arranged inside the upper air inlet pipe, an air inlet is arranged on the side wall of the outer end of the upper air inlet pipe, and the upper thermocouple is arranged in the through channel.
Optionally, the through passage penetrates through refractory bricks in the sintering section of the sintering furnace.
Optionally, a middle channel is arranged inside the lower air inlet pipe, an air inlet is arranged on the outer end side wall of the lower air inlet pipe, and the lower thermocouple is arranged in the middle channel.
Optionally, the middle passage penetrates through refractory bricks in the sintering section of the sintering furnace.
Optionally, the molybdenum heating body comprises an upper molybdenum heating body and a lower molybdenum heating body; the upper molybdenum heating bodies are positioned on two sides of the upper part of the material boat, and the lower molybdenum heating bodies are positioned on two sides of the lower part of the material boat.
Optionally, the upper molybdenum heating body is connected with an upper lead-out structure, the lower molybdenum heating body is connected with a lower lead-out structure, and the upper lead-out structure and the lower lead-out structure are arranged in a left-right staggered manner.
Optionally, the side wall of the sintering section of the sintering furnace comprises a heat insulation cotton plate, a heat preservation brick and a refractory brick which are sequentially arranged from outside to inside; the molybdenum heating body is arranged on the inner side wall of the refractory brick.
The utility model discloses for prior art gain following technological effect:
the utility model provides a many districts accuse temperature and air inlet unit for continuous degrease fritting furnace of walking beam formula sets up the heating member alone to single region upper and lower position, carries out single region upper and lower temperature and heats control alone. For a sintering furnace with large yield, the size deviation caused by different gas states is corrected by controlling the temperature up and down and modifying the temperature. The arrangement of the air inlet device leads clean hydrogen atmosphere to be directly introduced into the bottom and the upper part of the molybdenum heater, so that the carbon atmosphere is not easy to deposit, the molybdenum heater is protected, the upper atmosphere and the lower atmosphere in the furnace are adjusted, and the difference of sintering performances of products at the upper part and the lower part of the material boat is reduced. The air inlet hole is shared with the original thermocouple hole, so that the temperature control of the thermocouple is realized, air inlet is realized, and the arrangement of the air inlet hole is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a multi-zone temperature control and air inlet device for a walking beam type continuous degreasing sintering furnace according to the present invention;
FIG. 2 is a schematic structural view of the molybdenum heaters on and below a single zone in the multi-zone temperature control and air inlet device for the walking beam type continuous degreasing sintering furnace of the present invention;
FIG. 3 is a schematic diagram showing the arrangement position structure of the molybdenum heaters above and below the plurality of zones in the multi-zone temperature control and air inlet device for the walking beam type continuous degreasing sintering furnace of the present invention;
FIG. 4 is a schematic perspective view of the molybdenum heaters on the upper and lower sides of a plurality of areas in the multi-area temperature control and air inlet device for the walking beam type continuous degreasing sintering furnace of the present invention;
fig. 5 is a schematic perspective view of the upper and lower lead-out structures of the molybdenum heater in the upper and lower regions of the multi-region temperature control and air inlet device of the walking beam type continuous degreasing sintering furnace of the present invention.
Description of reference numerals: 1. an upper thermocouple; 2. heat preservation filling materials; 3. a ceiling brick; 4. a material boat; 5. a refractory brick; 6. insulating bricks; 7. a heat insulating cotton sheet; 8. a heat insulating brick; 9. a walking beam; 10. a lower thermocouple; 11. a lower molybdenum heating body; 12. a molybdenum heating body is arranged; 13. an upper intake pipe; 14. a lower lead-out structure; 15. an upper lead-out structure; 16. and a lower air inlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a multi-zone temperature control and air inlet device for a walking beam type continuous degreasing sintering furnace, which includes an upper thermocouple 1 and an upper air inlet pipe 13 disposed at the top of a sintering section of the sintering furnace, and a lower thermocouple 10 and a lower air inlet pipe 16 disposed at the lower portions of two sides of the sintering section of the sintering furnace, wherein molybdenum heating bodies are further disposed at two sides of a material boat 4 inside the sintering section of the sintering furnace.
In this embodiment, as shown in fig. 1-4, the upper and lower parts of a single region are individually provided with heating elements, that is, the top of the sintering section of the sintering furnace is provided with an upper thermocouple 1, the lower parts of the two sides of the sintering section of the sintering furnace are provided with lower thermocouples 10, and the two sides of the material boat are provided with an upper molybdenum heating element 12 and a lower molybdenum heating element 11, so as to perform individual heating control of the upper and lower temperatures of the single region, thereby making the sintering temperature of the furnace type with a larger yield more uniform.
The upper molybdenum heating body is connected with an upper lead-out structure 15, the lower molybdenum heating body is connected with a lower lead-out structure 14, and the upper lead-out structure 15 and the lower lead-out structure 14 are arranged in a left-right staggered mode.
For a sintering furnace with large yield, the gas consumption is also obviously increased, the gas environment states of the upper part and the lower part of the material boat 4 in the furnace are different, the stability of the product is influenced, and the size deviation caused by the different gas states is corrected by controlling the temperature up and down and modifying the temperature.
In order to make the gas environment state of the upper and lower parts of the material boat 4 more uniform, the upper and lower parts of a single area are separately provided with an air inlet device, namely, the top of the sintering section of the sintering furnace is provided with an upper air inlet pipe 13, the lower parts of the two sides of the sintering section of the sintering furnace are provided with lower air inlet pipes 16, so that clean hydrogen atmosphere is directly introduced to the bottom and the upper part of the molybdenum heating body, the carbon atmosphere is not easy to deposit, the molybdenum heating body is protected, the upper and lower atmospheres in the furnace can be adjusted to be uniform, and the sintering performance difference of the products at the.
In order to reduce air inlet holes, the thermocouple and the air inlet pipe are arranged in the same air inlet hole, namely, a through channel is arranged inside the upper air inlet pipe 13, an air inlet is arranged on the side wall of the outer end of the upper air inlet pipe 13, and the upper thermocouple 1 is arranged in the through channel. The hydrogen gas enters the furnace through the gap between the upper thermocouple 1 and the through channel. The lower air inlet pipe 16 is internally provided with a middle channel, the outer end side wall of the lower air inlet pipe 16 is provided with an air inlet, and the lower thermocouple 10 is arranged in the middle channel. Hydrogen gas enters the furnace through the gap between the lower thermocouple 10 and the middle passage. Therefore, the thermocouple and the air inlet pipe can be simultaneously installed by arranging the air inlet hole on the wall of the sintering section of the sintering furnace.
It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. The multi-zone temperature control and air inlet device for the walking beam type continuous degreasing sintering furnace is characterized by comprising an upper thermocouple and an upper air inlet pipe which are arranged at the top of a sintering section of the sintering furnace, and a lower thermocouple and a lower air inlet pipe which are arranged at the lower parts of two sides of the sintering section of the sintering furnace, wherein molybdenum heating bodies are further arranged on two sides of a material boat in the sintering section of the sintering furnace.
2. The multi-zone temperature control and gas inlet device for the walking-beam continuous degreasing sintering furnace as claimed in claim 1, wherein an upper mounting hole is provided at the top of the sintering section of the sintering furnace, lower mounting holes are provided at the lower portions of both sides of the sintering section of the sintering furnace, the upper thermocouple and the upper gas inlet pipe are both disposed in the upper mounting hole, and the lower thermocouple and the lower gas inlet pipe are both disposed in the lower mounting hole.
3. The multi-zone temperature control and gas inlet device for the walking-beam continuous degreasing sintering furnace as claimed in claim 1, wherein a through channel is provided inside the upper gas inlet pipe, a gas inlet is provided on the outer end sidewall of the upper gas inlet pipe, and the upper thermocouple is provided in the through channel.
4. The multi-zone temperature control and gas inlet device for a walking-beam continuous degreasing sintering furnace as claimed in claim 3, wherein the through channel runs through refractory bricks in the sintering section of the sintering furnace.
5. The multi-zone temperature control and gas inlet device for the walking-beam continuous degreasing sintering furnace as claimed in claim 1, wherein the lower gas inlet pipe is internally provided with a middle channel, the outer end side wall of the lower gas inlet pipe is provided with a gas inlet, and the lower thermocouple is arranged in the middle channel.
6. The multi-zone temperature control and gas inlet device for a walking-beam continuous degreasing sintering furnace as claimed in claim 5, wherein the middle channel runs through refractory bricks in the sintering section of the sintering furnace.
7. The multi-zone temperature control and gas inlet device for the walking-beam continuous degreasing sintering furnace as claimed in claim 1, wherein the molybdenum heating body comprises an upper molybdenum heating body and a lower molybdenum heating body; the upper molybdenum heating bodies are positioned on two sides of the upper part of the material boat, and the lower molybdenum heating bodies are positioned on two sides of the lower part of the material boat.
8. The multi-zone temperature control and gas inlet device for the walking beam type continuous degreasing sintering furnace as claimed in claim 7, wherein the upper molybdenum heater is connected with an upper lead-out structure, the lower molybdenum heater is connected with a lower lead-out structure, and the upper lead-out structure and the lower lead-out structure are arranged in a left-right staggered manner.
9. The multi-zone temperature control and air inlet device for the walking-beam continuous degreasing sintering furnace as claimed in claim 1, wherein the side wall of the sintering section of the sintering furnace comprises an insulating cotton plate, insulating bricks and refractory bricks which are arranged in sequence from outside to inside; the molybdenum heating body is arranged on the inner side wall of the refractory brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634359.5U CN212144497U (en) | 2020-04-24 | 2020-04-24 | Multi-zone temperature control and air inlet device for walking beam type continuous degreasing sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634359.5U CN212144497U (en) | 2020-04-24 | 2020-04-24 | Multi-zone temperature control and air inlet device for walking beam type continuous degreasing sintering furnace |
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| Publication Number | Publication Date |
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| CN212144497U true CN212144497U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020634359.5U Active CN212144497U (en) | 2020-04-24 | 2020-04-24 | Multi-zone temperature control and air inlet device for walking beam type continuous degreasing sintering furnace |
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| CN (1) | CN212144497U (en) |
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Address after: No. 365, Xinxing 1st Road, Cixi hi tech Industrial Development Zone, Ningbo City, Zhejiang Province, 315300 Patentee after: Ningbo Hengpu Vacuum Technology Co.,Ltd. Address before: 315300 no.488-560, North Youth Palace Road, Gutang street, Cixi City, Ningbo City, Zhejiang Province Patentee before: NINGBO HIPER VACUUM TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 365, Xinxing 1st Road, Cixi hi tech Industrial Development Zone, Ningbo City, Zhejiang Province, 315300 Patentee after: Ningbo Hengpu Technology Co.,Ltd. Address before: No. 365, Xinxing 1st Road, Cixi hi tech Industrial Development Zone, Ningbo City, Zhejiang Province, 315300 Patentee before: Ningbo Hengpu Vacuum Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |