CN104084581A - Vacuum degreasing sintering furnace - Google Patents
Vacuum degreasing sintering furnace Download PDFInfo
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- CN104084581A CN104084581A CN201410268054.6A CN201410268054A CN104084581A CN 104084581 A CN104084581 A CN 104084581A CN 201410268054 A CN201410268054 A CN 201410268054A CN 104084581 A CN104084581 A CN 104084581A
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Abstract
The invention relates to a method for metal powder vacuum sintering forming. The method for metal powder vacuum sintering forming comprises the following steps in sequence: (1) material loading: putting a metal powder product to be processed in a hearth of a vacuum degreasing sintering furnace; (2) vacuumizing: carrying out vacuumizing treatment on the hearth of the vacuum degreasing sintering furnace; (3) degreasing: clearing a forming agent in the metal powder product; (4) high temperature sintering. The method for metal powder vacuum sintering forming has the advantages of novel technology, convenient degreasing and high primary degreasing rate.
Description
Technical field
The present invention relates to vacuum heat treatment equipment field, in particular for metal powder injection molded vacuum degreasing fritting furnace.
Background technology
Vacuum degreasing fritting furnace is a kind of vacuum heat treatment equipment with vacuum degreasing and vacuum-sintering function, in metal powder injection molded production by general use.Existing vacuum degreasing fritting furnace structure mainly comprises and is provided with the body of heater of degreasing pipeline and is arranged on the degreasing case in body of heater, incubator is set in body of heater, pre-skimmed prod is placed in degreasing case and heats, lipid material in product is drawn out of through degreasing pipeline from degreasing mouth, can avoid being polluted by lipid material in body of heater, when cleaning, only need clear up degreasing case, the lipid material in product is mainly forming agent.The deficiency that existing vacuum degreasing fritting furnace exists is that degreasing can not once complete, one time degreasing rate is low, and lipid material, except the degreasing being drawn out of by degreasing pipeline, often needs secondary degreasing to open body of heater and again body of heater carried out to degreasing cleaning, complicated operation, working (machining) efficiency is low.
Summary of the invention
The object of the invention is the deficiency existing in order to solve above-mentioned existing vacuum degreasing fritting furnace, a kind of novel structure is provided, one time degreasing rate is high, the vacuum degreasing fritting furnace that working (machining) efficiency is high.
In order to realize foregoing invention object, the present invention has adopted following technical scheme:
Vacuum degreasing fritting furnace, comprises stove seat and sintering furnace fixed thereon, also comprises the aerating device, water cooling plant, vacuum extractor and the degreasing plant that are connected with sintering furnace; Sintering furnace comprises fire door and body of heater, and fire door is connected by hinge with body of heater, and handle is set on fire door, and many group fire door locking members are set along the edge of fire door and body of heater; In body of heater, be provided with interior insulated door, graphite material storing box, pulley, bracket and escape pipe, interior insulated door is by the burner hearth middle part sealing in body of heater, the inside edge wall of interior insulated door is provided with carbon felt heat-insulation layer, in the burner hearth of graphite material storing box in sealing, bracket is fixed on the madial wall of body of heater, and graphite material storing box is arranged on the top of bracket by pulley, and graphite material storing box slides on bracket by pulley, in the burner hearth of escape pipe upper end in sealing, escape pipe lower end is outside body of heater; Aerating device comprises flowmeter, Pressure gauge, charge valve and super-pressure safety valve, the charge valve switch of flowmeter, Pressure gauge, super-pressure safety valve and charge valve on body of heater lateral wall, charge valve inflation inlet in body of heater; Water cooling plant comprises recovery tank outside body of heater and coupled circulating water line, and circulating water line connects the bracket in fire door, body of heater and body of heater; Vacuum extractor comprises vacuum tube, pneumatic high vacuum flapper valve, the first bellows damper, Roots vaccum pump, the second bellows damper, rotary-vane vaccum pump, vavuum pump support and blast pipe; Rotary-vane vaccum pump and Roots vaccum pump are arranged on vavuum pump support, vacuum tube air inlet is in body of heater, vacuum tube gas outlet is communicated with blast pipe, pneumatic high vacuum flapper valve, Roots vaccum pump and rotary-vane vaccum pump are successively set on vacuum tube along air inlet to the direction of giving vent to anger, the first bellows damper is located on the vacuum tube between pneumatic high vacuum flapper valve and Roots vaccum pump, and the second bellows damper is located on the vacuum tube between Roots vaccum pump and rotary-vane vaccum pump;
Degreasing plant comprises the first valve, degreasing pipe, collection fat tank, collecting vessel, the first degreasing tank, the second degreasing tank, anti-recovery tank, the second valve, water-ring vacuum pump, Rose Box, exhaust outlet, hot and cold water switch and multiple line pipe damper, the entrance point of degreasing pipe connects escape pipe, and the first valve installation is in the junction of degreasing pipe and escape pipe; Import to Way out collection fat tank, the first degreasing tank, the second degreasing tank, anti-recovery tank and water-ring vacuum pump along degreasing pipe is sequentially arranged on degreasing pipe, the second valve is on the degreasing pipe between anti-recovery tank and water-ring vacuum pump, the degreasing pipe port of export connects Rose Box, and exhaust outlet is located on Rose Box; The bottom of the collecting vessel being connected with collection fat tank in collection fat tank; Multiple line pipe dampers are installed near on the degreasing pipe of body of heater; Collection fat tank, the first degreasing tank and the second degreasing tank are arranged in order from lower to upper by the height of rigging position, in the first degreasing tank and the second degreasing tank, are equipped with condensation rod; In collection fat tank, the first degreasing tank and the second degreasing tank, be equipped with and hot-water line and cold water pipe, hot and cold water switch is with degreasing pipe and collect fat tank, the first degreasing tank is connected with cold water pipe with the hot-water line in the second degreasing tank; Degreasing pipe between the first valve and the second degreasing tank is made up of the first degreasing pipe, the second degreasing pipe and the 3rd degreasing pipe, the first degreasing pipe two ends connect respectively the first valve and collection fat tank, the bottom of the junction of the first degreasing pipe and collection fat tank in collection fat tank, and the below of the junction of the position of collecting vessel in the first degreasing pipe and collection fat tank; The bottom of the second degreasing pipe connects the top of collection fat tank, and the top of the second degreasing pipe connects the bottom of the first degreasing tank, and the bottom of the 3rd degreasing pipe connects the top of the first degreasing tank, and the top of the 3rd degreasing pipe connects the bottom of the second degreasing tank; Multiple line pipe dampers on degreasing pipe comprise the 3rd bellows damper, the 4th bellows damper and the 5th bellows damper, the 3rd bellows damper is on the first degreasing pipe, the 4th bellows damper is on the second degreasing pipe, and the 5th bellows damper is on the degreasing pipe between the second degreasing tank and anti-recovery tank.
As preferably, on the vacuum tube in rotary-vane vaccum pump and Roots vaccum pump front, filter is installed respectively.
As preferably, the multiple line pipe dampers on degreasing pipe also comprise the 6th bellows damper, and the 6th bellows damper is between anti-recovery tank and water-ring vacuum pump.
Adopt the vacuum degreasing fritting furnace of technique scheme, comprised stove seat, sintering furnace, aerating device, water cooling plant, vacuum extractor and degreasing plant.The sealing property of sintering furnace and good heat insulating, safety easy to use.The effect of aerating device is suitably in body of heater, to be filled with micro-Ar gas by charge valve, realize windstream degreasing, and by flowmeter and Pressure gauge, body of heater intrinsic parameter is monitored, when in body of heater when overvoltage, by super-pressure safety valve releasing pressure automatically, guarantee vacuum degreasing fritting furnace security of operation.The effect of vacuum extractor is will in the body of heater of sintering furnace, to vacuumize before sintering, improves the efficiency of sintering.Interior insulated door and carbon felt heat-insulation layer are not only for insulation, and reduce the parts such as body of heater internal protecting wall, heater and be subject to the pollution of lipid material, prevented that parts between interior insulated door and body of heater internal protecting wall are subject to the pollution of lipid material, have improved degreasing efficiency and product quality., in carbon felt heat-insulation layer, extract the lipid material in burner hearth and impurity out by escape pipe, degreasing pipe and water-ring vacuum pump escape pipe upper end, and completed and collected and filter by collecting vessel and Rose Box, and one time degreasing rate is high, generally can reach 99.98%.In sum, the advantage of this vacuum degreasing fritting furnace is novel structure, good heat insulating, and one time degreasing rate is high.
Brief description of the drawings
Fig. 1: the schematic diagram of the embodiment of the present invention.
Fig. 2: the structural representation of body of heater in the embodiment of the present invention.
Fig. 3: the structural representation of sintering furnace and vacuum extractor in the embodiment of the present invention.
Fig. 4: the structural representation of sintering furnace and degreasing plant in the embodiment of the present invention.
Detailed description of the invention
Make a detailed explanation below in conjunction with Fig. 1-4 pair the specific embodiment of the present invention.
Vacuum degreasing fritting furnace as Figure 1-4, comprises stove seat 2, is fixed on the sintering furnace 1 on stove seat, and the aerating device 3 being connected with sintering furnace, water cooling plant 4, vacuum extractor 5 and degreasing plant 6.
Sintering furnace 1 comprises fire door 11 and body of heater 12, and fire door 11 is connected by hinge 13 with body of heater 12, and handle 15 is set on fire door 11, and many group fire door locking members 14 are set along the edge of fire door 11 and body of heater 12.
In body of heater, be provided with interior insulated door 121, graphite material storing box 125, pulley 122, bracket 123 and escape pipe 124, interior insulated door 121 is by the 126 middle part sealings of the burner hearth in body of heater 12, the inside edge wall of interior insulated door 121 is provided with carbon felt heat-insulation layer, in the burner hearth 126 of graphite material storing box 125 in sealing, bracket 123 is fixed on the madial wall of body of heater 12, graphite material storing box 125 is arranged on the top of bracket 123 by pulley 122, graphite material storing box 125 slides on bracket 123 by pulley 122, in the burner hearth 126 of escape pipe 124 upper ends in sealing, escape pipe 124 lower ends are outside body of heater 12.
The shell of body of heater 12 is cold chuck, outer for carbon steel internal layer be high temperature stainless steel, material storing box adopts graphite material manufacture, interior insulated door 121 is by the 126 middle part sealings of the burner hearth in body of heater 12, the inside edge wall of interior insulated door 121 is provided with carbon felt heat-insulation layer, not only stop furnace heat to run off and improved the effect of insulation, also solved the problem that stainless steel cannot normally effectively use the in the situation that of high-temperature high pressure simultaneously.
Aerating device 3 comprises flowmeter 31, Pressure gauge 32, super-pressure safety valve 34 and charge valve 33, on the lateral wall of the charge valve switch of flowmeter 31, Pressure gauge 32, super-pressure safety valve 34 and charge valve 33 in body of heater 12, charge valve 33 inflation inlet in body of heater 12.Can be according to the number of product fat content in the degreasing stage, suitably in body of heater, be filled with micro-Ar gas by charge valve, realize windstream degreasing, and by flowmeter and Pressure gauge, body of heater intrinsic parameter is monitored, comprise that the Ar throughput to being filled with in stove carries out size adjustment, when in body of heater when overvoltage, by super-pressure safety valve releasing pressure automatically, guarantee vacuum degreasing fritting furnace security of operation.
Water cooling plant 4 comprises recovery tank 41 outside body of heater 12 and coupled circulating water line 42, and circulating water line 42 connects the bracket 123 in fire door 11, body of heater 12 and body of heater, and water cooling plant 4 is mainly used in the cooling of sintering furnace 1.
Vacuum extractor 5 comprises vacuum tube 51, pneumatic high vacuum flapper valve 52, the first bellows damper 53, Roots vaccum pump 54, the second bellows damper 55, rotary-vane vaccum pump 56, blast pipe 57 and vavuum pump support 58.Rotary-vane vaccum pump 56 and Roots vaccum pump 54 are arranged on vavuum pump support 58, on the vacuum tube 51 in rotary-vane vaccum pump 56 and Roots vaccum pump 54 fronts, filter is installed respectively, impurity in filtering pumping process, the service life of improving rotary-vane vaccum pump 56 and Roots vaccum pump 54.Vacuum tube 51 air inlets are in body of heater 12, vacuum tube 51 gas outlets are communicated with blast pipe 57, pneumatic high vacuum flapper valve 52, Roots vaccum pump 54 and rotary-vane vaccum pump 55 are successively set on vacuum tube 51 along air inlet to the direction of giving vent to anger, the first bellows damper 53 is located on the vacuum tube 51 between pneumatic high vacuum flapper valve 52 and Roots vaccum pump 54, and the second bellows damper 55 is located on the vacuum tube 51 between Roots vaccum pump 54 and rotary-vane vaccum pump 56.
The effect of vacuum extractor 5 is will in the body of heater of sintering furnace 1, to vacuumize before sintering, improves the efficiency of sintering.Especially use rotary-vane vaccum pump 56 and Roots vaccum pump 54 to coordinate and vacuumize, efficiency is high, and the effect of pneumatic high vacuum flapper valve 52 is to prevent air return.The effect of the first bellows damper 53 and the second bellows damper 55 is that sintering furnace 1 is carried out to damping processing, product significantly reduces to the structural behaviour of product in the process of sintering after degreasing, the excessive direct qualification rate that affects graphite material storing box 125 interior products of vibration of sintering furnace.
Degreasing plant 6 comprises the first valve 61, degreasing pipe 62, collection fat tank 63, collecting vessel 64, the first degreasing tank 65a, the second degreasing tank 65b, anti-recovery tank 66, the second valve 67, water-ring vacuum pump 68, Rose Box 69, exhaust outlet 691 and multiple line pipe damper 6a.Outer escape pipe 124, the first valves 61 of entrance point connection body of heater 12 of degreasing pipe 62 are arranged on the junction of degreasing pipe 62 and escape pipe 124.Import to Way out collection fat tank 63, the first degreasing tank 65a, the second degreasing tank 65b, anti-recovery tank 66 and water-ring vacuum pump 68 along degreasing pipe 62 is sequentially arranged on degreasing pipe 62, the second valve 67 is on the degreasing pipe 62 between anti-recovery tank 66 and water-ring vacuum pump 68, degreasing pipe 62 ports of export connect Rose Box 69, and exhaust outlet 691 is located on Rose Box 69.The bottom of the collecting vessel 64 being connected with collection fat tank 63 in collection fat tank 63.In the first degreasing tank 65a and the second degreasing tank 65b, be equipped with condensation rod 651.In collection fat tank 63, the first degreasing tank 65a and the second degreasing tank 65b, be equipped with hot-water line and cold water pipe, hot and cold water switch and degreasing pipe 62 and collection fat tank 63, the first degreasing tank 65a are connected with cold water pipe with the hot-water line in the second degreasing tank 65b and control their water flowing situation.Water-ring vacuum pump 68 is to adopt water to do medium to vacuumize and carry out degreasing, collection fat tank 63, the first degreasing tank 65a and the logical cold water of the second degreasing tank 65b are in order to absorption and fixing lipid material, logical hot water makes the temperature of degreasing pipe 62 and collection fat tank 63 higher than the melting temperature of lipid material, to avoid the obstruction to degreasing pipe 62, can collect clearly the lipid material that on the interior condensation rod 651 of fat tank 63, condensation and trapping obtain simultaneously.
An effect of the second valve 67 is to reduce negative close of water-ring vacuum pump 68 while opening car, and because degreasing pipe 62 is very long, another effect of the second valve 67 is that the convenient degreasing pipe 62 that detects unloads leak rate.The effect of anti-recovery tank 66 is to prevent that the first valve 61 and the second valve 67 from opening is the situation that the poor generation suck-back of vacuum appears in the interior vacuum of degreasing pipe 62.
Degreasing pipe 62 between the first valve 61 and the second degreasing tank 65b is made up of the first degreasing pipe 621, the second degreasing pipe 622 and the 3rd degreasing pipe 623, the first degreasing pipe 621 two ends connect respectively the first valve 61 and collection fat tank 63, the bottom of the junction of the first degreasing pipe 621 and collection fat tank 63 in collection fat tank 63, and the position of collecting vessel 64 is the below with the junction of collection fat tank 63 in the first degreasing pipe 621, and collecting vessel 64 can better be collected the lipid material that dissolves backward lower landing.The bottom of the second degreasing pipe 622 connects the top of collection fat tank 63, the top of the second degreasing pipe 622 connects the bottom of the first degreasing tank 65a, the bottom of the 3rd degreasing pipe 623 connects the top of the first degreasing tank 65a, and the top of the 3rd degreasing pipe 623 connects the bottom of the second degreasing tank 65b.Collection fat tank 63, the first degreasing tank 65a and the second degreasing tank 65b are arranged in order from lower to upper by the height of rigging position, the first degreasing tank 65a and the second degreasing tank 65b all arrange by low export department of import department high dip, the main purpose of arranging is like this to allow the molten lower lipid material be mainly that forming agent is in gradient inflow collecting vessel the time marquis of fat melting, play the guiding role, improve the efficiency of receiving fat.
Multiple line pipe damper 6a are installed near on the degreasing pipe 62 of body of heater 12, multiple line pipe damper 6a comprise the 3rd bellows damper 6a1, the 4th bellows damper 6a2 and the 5th bellows damper 6a3, the 3rd bellows damper 6a1 is on the first degreasing pipe 621, the 4th bellows damper 6a2 is on the second degreasing pipe 622, the 5th bellows damper 6a3 is on the degreasing pipe 62 between the second degreasing tank 65b and anti-recovery tank 66, line pipe damper 6a is for higher lifting damping effect, line pipe damper 6a also can be set on the degreasing pipe 62 away from body of heater 12, the 6th line pipe damper for example can also be set on the degreasing pipe 62 between anti-recovery tank 66 and water-ring vacuum pump 68.The effect of line pipe damper 6a is that sintering furnace 1 is carried out to damping processing, and product significantly reduces to the structural behaviour of product in the process of sintering after degreasing, the excessive direct qualification rate that affects graphite material storing box 125 interior products of vibration of sintering furnace.
When vacuum degreasing fritting furnace uses, step is as follows:
(1) material loading, in graphite material storing box 125, cuts out interior insulated door 121 and fire door 11 by metal dust product placement to be processed successively, locks fire door 11 by fire door locking member 14;
(2) vacuumize, open rotary-vane vaccum pump 56 and pneumatic cap of high-vacuum baffle valve 52, by rotary-vane vaccum pump 56 to vacuumizing processing in body of heater, the gas of extracting out is discharged by blast pipe, treat that the interior vacuum of body of heater is evacuated to 1.1-3 holder and opens Roots vaccum pump 54 again, vacuum in stove is evacuated to 1.010-1 holder, in body of heater, has vacuumized and closed rotary-vane vaccum pump 56, Roots vaccum pump 54 and pneumatic cap of high-vacuum baffle valve 52;
(3) degreasing, to heating in burner hearth, the process of heating is started to rise by 20 degree until 650 degree degreasings finish, and hot and cold water switch controls the logical hot water of degreasing pipe 62, the logical cold water of cold water pipe in collection fat tank 63, the first degreasing tank 65a and the second degreasing tank 65b, open charge valve, flowmeter shows the flow 20-230L/min that reaches Product Process requirement, open water-ring vacuum pump 68, first open the second valve 67, open again the first valve 61, metal dust interiors of products in graphite material storing box 125 is because of high-temperature digestion mixture out, comprise nitrogen, hydrogen, mainly that the lipid materials such as forming agent enter degreasing pipe 62 by escape pipe, successively through collection fat tank 63, the first degreasing tank 65a and the second degreasing tank 65b, utilize condensation ratio juris, the lipid materials such as forming agent run into the condensation rod 651 in the first degreasing tank 65a and the second degreasing tank 65b, the lipid materials such as forming agent separate after coagulation on the surface of condensation rod 651 with atmosphere such as nitrogen hydrogen, the atmosphere such as nitrogen hydrogen enter Rose Box 69 by degreasing pipe 62, finally discharged by exhaust outlet 691, the logical hot water of degreasing pipe 62, the logical hot water of hot-water line in collection fat tank 63, the first degreasing tank 65a and the second degreasing tank 65b, hot water temperature is between 63-99 degree, hot water temperature adjusts with the molten point of the lipid materials such as forming agent, the molten points of lipid material such as general forming agent are between 60-90 degree, the lipid materials such as hot water temperature exceeds molten some 3-9 degree of forming agent, the forming agent condensing on the first degreasing tank 65a and the second degreasing tank 65b start fat melting, finally wander to collecting vessel 64 and complete degreasing,
(4) the metal dust product that completes ungrease treatment is carried out to high temperature sintering, make its moulding, the temperature of high temperature sintering is 1300-1500 degree.
(5) product sintering finishes, and opens fire door and take out the product that sintering completes after temperature in burner hearth drops to normal temperature, opens collecting vessel and removes the lipid materials such as forming agent, carries out successively next stove sintering.
The temperature of above-mentioned sintering regulates with the difference of product, and for example product is 316L stainless steel, and general sintering temperature is 1365 degree.Adopt degreasing rate of above-mentioned vacuum degreasing fritting furnace can reach 99.98%.
Claims (3)
1. vacuum degreasing fritting furnace, comprises stove seat and sintering furnace fixed thereon, characterized by further comprising the aerating device, water cooling plant, vacuum extractor and the degreasing plant that are connected with sintering furnace;
Sintering furnace comprises fire door and body of heater, and fire door is connected by hinge with body of heater, and handle is set on fire door, and many group fire door locking members are set along the edge of fire door and body of heater; In body of heater, be provided with interior insulated door, graphite material storing box, pulley, bracket and escape pipe, interior insulated door is by the burner hearth middle part sealing in body of heater, the inside edge wall of interior insulated door is provided with carbon felt heat-insulation layer, in the burner hearth of graphite material storing box in sealing, bracket is fixed on the madial wall of body of heater, and graphite material storing box is arranged on the top of bracket by pulley, and graphite material storing box slides on bracket by pulley, in the burner hearth of escape pipe upper end in sealing, escape pipe lower end is outside body of heater;
Aerating device comprises flowmeter, Pressure gauge, charge valve and super-pressure safety valve, the charge valve switch of flowmeter, Pressure gauge, super-pressure safety valve and charge valve on body of heater lateral wall, charge valve inflation inlet in body of heater;
Water cooling plant comprises recovery tank outside body of heater and coupled circulating water line, and circulating water line connects the bracket in fire door, body of heater and body of heater;
Vacuum extractor comprises vacuum tube, pneumatic high vacuum flapper valve, the first bellows damper, Roots vaccum pump, the second bellows damper, rotary-vane vaccum pump, vavuum pump support and blast pipe; Rotary-vane vaccum pump and Roots vaccum pump are arranged on vavuum pump support, vacuum tube air inlet is in body of heater, vacuum tube gas outlet is communicated with blast pipe, pneumatic high vacuum flapper valve, Roots vaccum pump and rotary-vane vaccum pump are successively set on vacuum tube along air inlet to the direction of giving vent to anger, the first bellows damper is located on the vacuum tube between pneumatic high vacuum flapper valve and Roots vaccum pump, and the second bellows damper is located on the vacuum tube between Roots vaccum pump and rotary-vane vaccum pump;
Degreasing plant comprises the first valve, degreasing pipe, collection fat tank, collecting vessel, the first degreasing tank, the second degreasing tank, anti-recovery tank, the second valve, water-ring vacuum pump, Rose Box, exhaust outlet, hot and cold water switch and multiple line pipe damper, the entrance point of degreasing pipe connects escape pipe, and the first valve installation is in the junction of degreasing pipe and escape pipe; Import to Way out collection fat tank, the first degreasing tank, the second degreasing tank, anti-recovery tank and water-ring vacuum pump along degreasing pipe is sequentially arranged on degreasing pipe, the second valve is on the degreasing pipe between anti-recovery tank and water-ring vacuum pump, the degreasing pipe port of export connects Rose Box, and exhaust outlet is located on Rose Box; The bottom of the collecting vessel being connected with collection fat tank in collection fat tank; Multiple line pipe dampers are installed near on the degreasing pipe of body of heater; Collection fat tank, the first degreasing tank and the second degreasing tank are arranged in order from lower to upper by the height of rigging position, in the first degreasing tank and the second degreasing tank, are equipped with condensation rod; In collection fat tank, the first degreasing tank and the second degreasing tank, be equipped with and hot-water line and cold water pipe, hot and cold water switch is with degreasing pipe and collect fat tank, the first degreasing tank is connected with cold water pipe with the hot-water line in the second degreasing tank;
Degreasing pipe between the first valve and the second degreasing tank is made up of the first degreasing pipe, the second degreasing pipe and the 3rd degreasing pipe, the first degreasing pipe two ends connect respectively the first valve and collection fat tank, the bottom of the junction of the first degreasing pipe and collection fat tank in collection fat tank, and the below of the junction of the position of collecting vessel in the first degreasing pipe and collection fat tank; The bottom of the second degreasing pipe connects the top of collection fat tank, and the top of the second degreasing pipe connects the bottom of the first degreasing tank, and the bottom of the 3rd degreasing pipe connects the top of the first degreasing tank, and the top of the 3rd degreasing pipe connects the bottom of the second degreasing tank;
Multiple line pipe dampers on degreasing pipe comprise the 3rd bellows damper, the 4th bellows damper and the 5th bellows damper, the 3rd bellows damper is on the first degreasing pipe, the 4th bellows damper is on the second degreasing pipe, and the 5th bellows damper is on the degreasing pipe between the second degreasing tank and anti-recovery tank.
2. vacuum degreasing fritting furnace according to claim 1, is characterized in that, on the vacuum tube in rotary-vane vaccum pump and Roots vaccum pump front, filter is installed respectively.
3. vacuum degreasing fritting furnace according to claim 1, is characterized in that the multiple line pipe dampers on degreasing pipe also comprise the 6th bellows damper, and the 6th bellows damper is between anti-recovery tank and water-ring vacuum pump.
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| CN104588659A (en) * | 2015-02-16 | 2015-05-06 | 苏州赛菲集团有限公司 | Constant-temperature automatic trace circulating water degreasing equipment and method thereof |
| CN110695359A (en) * | 2019-10-30 | 2020-01-17 | 新冶高科技集团有限公司 | Hot isostatic pressing device and production process of densified product |
| CN111451498A (en) * | 2020-02-28 | 2020-07-28 | 福建省长汀金龙稀土有限公司 | Degreasing method for powder metallurgy sintering |
| CN114589306A (en) * | 2021-11-20 | 2022-06-07 | 蓝山县金山川粉末冶金有限公司 | Powder metallurgy degreasing and oil discharging system |
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