CN202984665U - Cooling zone structure of metal injection molding continuous type sintering furnace - Google Patents
Cooling zone structure of metal injection molding continuous type sintering furnace Download PDFInfo
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- CN202984665U CN202984665U CN 201220634257 CN201220634257U CN202984665U CN 202984665 U CN202984665 U CN 202984665U CN 201220634257 CN201220634257 CN 201220634257 CN 201220634257 U CN201220634257 U CN 201220634257U CN 202984665 U CN202984665 U CN 202984665U
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Abstract
The utility model discloses a cooling zone structure of a metal injection molding continuous type sintering furnace. The middle section or back section of the cooling zone is provided with a lifting spacer door for separating the cooling zone; the cooling zone is respectively provided with air inlet pipelines at the front side and the back side of the lifting spacer door; the air inlet pipeline at the front side of the spacer door is used for conveying a reducing gas; and the air inlet pipeline at the back side of the spacer door is used for conveying an inert gas. The cooling zone structure of the metal injection molding continuous type sintering furnace guarantees a potential level of a product when being cooled as the spacer door is arranged at the cooling zone, and the front section of the spacer door is provided with the reducing gas pipeline, reduces deformation of the product as an air cooling jacket structure is arranged at a slow cooling section (between a sintering section and a cooling section) to control the cooling speed, and prevents oxidized gas from entering into the front section of the spacer door to cause oxidization of the product during the cooling time as an inert gas sealing measure is arranged behind the spacer door of the furnace to ensure the mixing of an oxidizing gas when the spacer door of the furnace is opened.
Description
Technical field
The utility model relates to PM technique, relates in particular to the sintering furnace of metal injection molded use.
Background technology
Metal injection molded is a kind of brand-new parts machining technology of field of powder metallurgy that is incorporated into by Plastics Injection Molding Technology.Powder injection-molded can be as producing plastics, the parts that one-shot forming is very complicated.Powder injection-molded is the moulding of small complex parts and a revolution of processing processing technology.
At present, metal powder injection molding producer all adopts traditional thermoplasticity bonding system (polyester paraffin, polyester oil, polyester compound etc.), polyformaldehyde system etc.System is different, and degreasing process is different.At present, solvent degreasing and catalysis degreasing are just in penetration and promotion.System is different, and agglomerating plant is widely different.At present, popular is that agglomerating plant is vacuum sintering furnace (equipment).Continuous sintering furnace has obtained to use at present aspect the polyformaldehyde system, the Chinese utility model that as notification number is CN201311177 discloses a kind of sintering furnace on September 16th, 2009, it comprises body of heater, described body of heater is followed successively by degreasing section, sintering stage and cooling section from its import to outlet, this degreasing section, sintering stage and cooling section are linear arrangement; The porch of degreasing section is provided with fire door, and the degreasing section is fire door together with being provided with at least between sintering stage, and sintering stage is fire door together with being provided with at least between cooling section, and the exit of cooling section is provided with fire door; Described degreasing section and sintering stage are provided with heater, and cooling section is provided with cooling device; Described degreasing section, sintering stage and cooling section are provided with transmission mechanism.It adopts linear type structure, and degreasing in traditional MIM technique, sintering, the single operation such as cooling are integrated into comprehensive operation.
But the degreasing sintered equipment and technology of continous way is not mature enough, has a lot of problems.Existing cerul, plasticity system, continous way agglomerating plant subject matter is that sintering furnace cooling section cooling velocity is fast, and cooling velocity is inhomogeneous, and product greater than the conventional sintering time, easily produces oxidation stain in cooling section cool time.
The utility model content
Technical problem to be solved in the utility model just is to provide a kind of metal injection molded continuous sintering furnace cooling section structure, can effectively solve sintering furnace cooling section cooling velocity fast, cooling velocity is inhomogeneous, product greater than the conventional sintering time, easily produces the problem of oxidation stain in cooling section cool time.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of metal injection molded continuous sintering furnace cooling section structure, it is characterized in that: described cooling section stage casing or back segment arrange a liftable separated door cooling section are separated, described cooling section is respectively equipped with admission line in liftable separated door front side and rear side, the admission line of described separated door front side is used for carrying reducibility gas, and the admission line of described separated door rear side is used for carrying inert gas.
As preferably, described admission line comprises that one extends transversely into the gas distribution pipe of cooling section, and gas distribution pipe is provided with some gas outlets.
As preferably, the tuning movable joint is equipped with at described air inlet pipe two ends, is threaded between air inlet pipe and tuning movable joint.
As preferably, described cooling section front end connects the slow cooling section, and described slow cooling section arranges air-cooled jacket structured, and described air-cooled chuck inner chamber is dried by an air blast.
As preferably, described cooling section is the L shaped structure that is comprised of traversing section and vertical section, wherein separated door is located at the junction of traversing section and vertical section, and described vertical section afterbody arranges discharging opening, and this discharging opening is connected by external cycling mechanism with the charging aperture of continuous sintering furnace.
The utility model arranges separated door at cooling section, and separated door leading portion configuration reducibility gas pipeline has guaranteed the current potential when product is cooling; Simultaneously, the utility model is controlled cooling velocity (between sintering stage and cooling section) arranges air-cooled jacket structuredly in the slow cooling section, reduces deformation of products; The sneaking into of oxidizing gas when door opened for guaranteeing to separate arranges the inert gas seal measure, oxidation when causing that to avoid oxidizing atmosphere to enter the separated door leading portion product is cooling separating the fire door back segment.And be the implementation procedure continuous production, adopt external cycling mechanism to connect discharging opening and charging aperture, guarantee system's continuous circulation operation.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the structural representation of the utility model continuous sintering furnace;
Fig. 2 is degreasing section inert gas pipeline structural representation;
Fig. 3 is the cooling vent hole structure schematic diagram of degreasing section;
Fig. 4 is the long-pending wax jar structure schematic diagram of degreasing section;
Fig. 5 is the slow cooling section structural representation;
Fig. 6 is the cooling section structural representation;
Fig. 7 is cooling section admission line structural representation;
Fig. 8 is gas distribution pipe structural representation in the cooling section admission line;
Fig. 9 is the temperature alarming device structural representation;
Figure 10 is temperature alarming device control principle schematic diagram.
The specific embodiment
Below in conjunction with metal injection molded continuous sintering furnace, cooling section structure of the present utility model is made and being illustrated.
As shown in Figure 1, be metal injection molded continuous sintering furnace, it comprises a combined type body of heater, the burner of described body of heater is provided with the liftable fire door and charging aperture 6, stove tail are provided with liftable fire door and discharging opening 60, and described body of heater is disposed with degreasing section 1, sintering stage 2, slow cooling section 3, cooling section 4 from burner to the stove tail.Described furnace binding is meshbeltfurnace or stepping beam type continuous oven; When employing pushed away boat structure sintering furnace, material boat size and fire box temperature were the integral multiple relation.
Adopt external cycling mechanism between described charging aperture 6 and discharging opening 60.This outer circulation mechanism adopts sprocket wheel, belt or gear drive to realize.
Described body of heater is provided with sample tap 150 on the linkage section 15 of degreasing section and sintering stage, described sample tap adopts upper shed or side opening mode.This sample tap adopts mechanical pull bar or bolted mode to open or close sample tap.
As Fig. 2 to the concrete structure that Figure 4 shows that the degreasing section, described degreasing section is provided with at least one inert gas pipeline 11, the gas outlet subsection setup of described inert gas pipeline is in degreasing section burner hearth 13, the section of degreasing simultaneously is provided with at least one control carbon gas pipeline 12, and the gas outlet subsection setup of described control carbon gas pipeline is in degreasing section burner hearth 13.Inert gas pipeline 11 and control carbon gas pipeline 12 can arrange a row or multi-row gas outlet vertically.In Fig. 2, inert gas pipeline 11 is provided with three, is respectively the first inert gas pipeline 110, the second inert gas pipeline 111, the 3rd inert gas pipeline 112, and it stretches into the length difference of burner hearth 13 inside.Control carbon gas pipeline 12 also can adopt the structure identical with inert gas pipeline 11.The adjusting of control carbon gas flow direction can be controlled carbon gas pipeline 12 by rotation and carries out, control carbon gas pipeline two ends are rotatably connected on the tuning movable joint, specifically can adopt thread connection, control carbon gas pipeline is provided with handle, turning handle, the gas outlet direction is rotated with control carbon gas pipeline 12 and is changed, certainly, for the adjusting of the gas outlet direction that realizes inert gas pipeline 11, it also can adopt the tuning movable joint structure.
Described degreasing section is provided with at least two cooling passages 131 that are communicated with flue and body of heater outer air, and this cooling passage is for closing and regulate the adjustable passage of throughput.This cooling passage 131 passes heat-insulation layer 130 and is communicated with degreasing section flue.Passage 131 adopts the natural ventilation mode.When needs are regulated zone temperatures, can realize by the openings of sizes of opening this section upper shed, can cover opening with a rotating baffle plate, flap shutter can be regulated openings of sizes.
Control carbon gas in described control carbon gas pipeline adopts decarburization atmosphere, and this decarburization atmosphere is H
2Perhaps H
2O or decomposed ammonia body or CO
2Perhaps O
2Also or the combination of above-mentioned gas.
Described degreasing section front end below arranges long-pending wax tank 14, and described long-pending wax tank is provided with grafting wax mouth 140, inert gas entrance 141 and exhaust-valve 142.
Be illustrated in figure 5 as the concrete structure of slow cooling section, described slow cooling section 3 arranges air-cooled jacket structured, be about to the slow cooling section and be set to the jacket pipe structure, outer tube sleeve on inner pipe, have certain space to form air-cooled chuck inner chamber 30 between outer tube and inner tube, described air-cooled chuck inner chamber 30 is inwardly dried by an air blast 31.
As Fig. 6 to Figure 8 shows that the cooling section concrete structure, described cooling section arranges a liftable separated door 40 cooling section is separated, described cooling section in liftable separated door front side and rear side be respectively equipped with admission line 41, the admission line of described separated door front side is used for carrying reducibility gas, and the admission line of described separated door rear side is used for carrying inert gas.
Wherein, described admission line 41 comprises that one extends transversely into the gas distribution pipe 411 of cooling section, and this gas distribution pipe two ends are movable joint 413, and gas distribution pipe is provided with several gas outlets 412.Movable joint and gas distribution pipe adopt spiral marking connection, when needs are adjusted airflow direction, realize by rotating the gas distribution pipe angle.
As shown in Figure 9 and Figure 10, temperature alarming device on the degreasing section describes as example, degreasing section burner hearth 13 outer heat-insulation layers 130 are provided with a main temperature thermocouple 51 and a tracking and temperature testing thermocouple 50, described main temperature thermocouple and tracking and temperature testing thermocouple are connected with switch board 5, and switch board is provided with one and follows the tracks of overtemperature alarm 52.Switch board 5 internal controller judge whether overtemperature according to the data that main temperature thermocouple 51 and a tracking and temperature testing thermocouple 50 record, if overtemperature is controlled and followed the tracks of overtemperature alarm 52 and report to the police.
Temperature alarming device on sintering stage is identical with temperature alarming device structure on above-mentioned degreasing section.
In addition, the heater of described degreasing section and sintering stage adopts silicon carbide heater, and described sintering furnace arranges the sintered dimensions image acquistion system at degreasing section, sintering stage.This system has photoelectric coupling mechanism, has optical system, signal processing system, sintering shrinkage curve setting program and pushes away the compositions such as boat time setting program.
The slow cooling section is provided with protective gas admission line 32, and as the use that passes into sintering gas shield gas, the slow cooling section arranges thermocouple temperature measuring apparatus, is used for the temperature of monitoring slow cooling section, is convenient in time adjust cooling velocity, reduces deformation of products.
The beneficial effects of the utility model are:
1, set up the inert gas pipeline in the segmentation of degreasing section, pipeline can carry out flow and airflow direction adjusting at different warm areas as required;
2, for avoiding the uniformity in airflow influence temperature field, establish cooling passage outside degreasing section flue, avoid the burner hearth internal temperature uncontrollable;
3, in the degreasing section, control carbon gas pipeline is set, control carbon gas can be adjusted at different sections as required, and after control carbon gas enters burner hearth inside, airflow direction is adjustable;
4, control carbon gas adopts decarburization atmosphere, and these atmosphere comprise H
2, H
2O, decomposed ammonia body, CO
2, O
2And their combination, to adapt to control carbon needs.Contain O
2The mist gas ratio is controlled at non-explosive range.
5, for guaranteeing size uniform, adopt meshbeltfurnace, stepping beam type continuous oven; When pushing away boat structure sintering furnace, material boat size and fire box temperature are the integral multiple relation.
6, (sintering stage and cooling section) air inlet arranges the temperature control means in the slow cooling section, controls cooling velocity, reduces deformation of products;
7, at cooling section, separated door is set, separated door leading portion configuration reducibility gas pipeline, the current potential when cooling with the assurance product;
8, for guaranteeing to separate sneaking into of oxidizing gas when door opened, the inert gas seal measure is set, oxidation when causing that to avoid oxidizing atmosphere to enter the separated door leading portion product is cooling separating the fire door back segment.
9, be the inhomogeneous deformation of products that causes in the temperature field of avoiding product degreasing and sintering process, in preferred high-quality Temperature Control Measures, the control accuracy section temperature difference of temperature ± 5 ℃.These measures comprise that high-quality carborundum heater, symmetrically arranged TEMP detect the tracking measure;
10, controlled for effectively realizing the sintering process size, at degreasing section, sintering stage, the sintered dimensions image acquistion system is set, from motion tracking product sintered dimensions situation of change, to adjust degreasing, sintering process system;
11, for avoiding burner to amass wax, long-pending wax tank body is set under burner; On long-pending wax tank body, the inert gas pipeline is set, does not need the blowing out operation to guarantee the de-waxing process, nonoxidizing gas destroys system balancing;
12, be the implementation procedure continuous production, adopt external cycling mechanism, guarantee system's continuous circulation operation.
13, at the follow-up sample tap that arranges of degreasing section, be convenient to sample analysis skimming processes situation and adjust.
The utility model is applicable to the continuous degreasing sintering of cerul, plasticity system, and sintering process can realize that carbon is controlled, and atmosphere is controlled, temperature is controlled, and product size is controlled, and Product Precision is high, can match in excellence or beauty with the vacuum drying oven sintered products.
Claims (5)
1. metal injection molded continuous sintering furnace cooling section structure, it is characterized in that: described cooling section stage casing or back segment arrange a liftable separated door cooling section are separated, described cooling section is respectively equipped with admission line in liftable separated door front side and rear side, the admission line of described separated door front side is used for carrying reducibility gas, and the admission line of described separated door rear side is used for carrying inert gas.
2. continuous sintering furnace cooling section structure according to claim 1, it is characterized in that: described admission line comprises that one extends transversely into the gas distribution pipe of cooling section, and gas distribution pipe is provided with some gas outlets.
3. continuous sintering furnace cooling section structure according to claim 2 is characterized in that: the tuning movable joint is equipped with at described air inlet pipe two ends, is threaded between air inlet pipe and tuning movable joint.
4. continuous sintering furnace cooling section structure according to claim 1 is characterized in that: described cooling section front end connects the slow cooling section, and described slow cooling section arranges air-cooled jacket structured, and described air-cooled chuck inner chamber is dried by an air blast.
5. continuous sintering furnace cooling section structure according to claim 1, it is characterized in that: the L shaped structure of described cooling section for being formed by traversing section and vertical section, wherein separated door is located at the junction of traversing section and vertical section, described vertical section afterbody arranges discharging opening, and this discharging opening is connected by external cycling mechanism with the charging aperture of continuous sintering furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634257 CN202984665U (en) | 2012-11-27 | 2012-11-27 | Cooling zone structure of metal injection molding continuous type sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634257 CN202984665U (en) | 2012-11-27 | 2012-11-27 | Cooling zone structure of metal injection molding continuous type sintering furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202984665U true CN202984665U (en) | 2013-06-12 |
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ID=48555888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220634257 Expired - Fee Related CN202984665U (en) | 2012-11-27 | 2012-11-27 | Cooling zone structure of metal injection molding continuous type sintering furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202984665U (en) |
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2012
- 2012-11-27 CN CN 201220634257 patent/CN202984665U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 321001 Zhejiang Province, Jinhua city Wucheng District Youth Industrial Zone Patentee after: ZHEJIANG YIHUO TECHNOLOGY CO.,LTD. Address before: 321001 Zhejiang Province, Jinhua city Wucheng District Youth Industrial Zone Patentee before: ZHEJIANG YIHUO TECH CO.,LTD. |
|
| 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: 20130612 Termination date: 20211127 |