CN209754014U - Vacuum degreasing sintering furnace - Google Patents

Abstract

The utility model provides a vacuum degreasing sintering furnace, including the furnace barrel body, set up in the furnace barrel body enclose by the insulating layer and establish the effective zone of heating that forms and run through the wax pipeline of catching of insulating layer and furnace barrel body, catch the effective zone of heating of one end intercommunication of wax pipeline, catch in the wax jar is caught to the other end intercommunication of wax pipeline for steam wax with the production in the effective zone of heating is arranged to catching in the wax jar through catching the wax pipeline, it is provided with the heat radiation that is used for the effective zone of heating of separation to the anti-radiation body of catching the wax jar to catch the effective zone of heating that corresponds in the wax pipeline. The technical scheme of the utility model, can effectively reduce the pollution to the furnace body, reduce the influence to next blank sintering quality.

Description

Vacuum degreasing sintering furnace

Technical Field

The utility model relates to an industrial furnace technical field especially relates to a vacuum degreasing sintering furnace.

Background

The conventional dewaxing process is to arrange a vertical or horizontal wax catching tank outside a furnace body, wherein the horizontal wax catching tank is directly connected with the lower part of a furnace wall and is connected with the vertical wax catching tank, and one side of the vertical wax catching tank is connected with a vacuum pump set. In the sintering process, the vacuum pump continuously vacuumizes the furnace body; the temperature in the furnace body rises, the binder and the forming agent are gradually gasified, pumped out by a vacuum pump set and condensed in a wax catching tank through a cooling system.

Although most of the adhesive or the forming agent can be contained in the wax catching tank by the traditional dewaxing equipment, the adhesive or the forming agent exists in a high-temperature furnace body in a gas form, but a cooling waterproof layer is arranged on the inner side of the furnace wall, so that part of the adhesive or the forming agent is solidified on the furnace wall when the adhesive or the forming agent is not drawn into the wax catching tank, the furnace body is polluted, and the quality of next product sintering is possibly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a vacuum degreasing sintering furnace, the problem that the furnace body that produces when aiming at solving dewaxing among the prior art pollutes and sintering quality is low is clear away to the vapour wax that produces thoroughly arouses.

In order to realize the above-mentioned purpose, the utility model provides a vacuum degreasing sintering furnace, including the boiler barrel body, set up in the boiler barrel body enclose by the insulating layer and establish the effective zone of heating that forms and run through the insulating layer with the wax pipeline of catching of boiler barrel body, catch the one end intercommunication of wax pipeline the effective zone of heating, the wax jar is caught to the other end intercommunication of catching the wax pipeline, and be used for with the vapor wax that produces in the effective zone of heating passes through catch the wax pipeline arrange extremely in catching the wax jar, it corresponds in the wax pipeline to catch the effective zone of heating be provided with and be used for the separation the heat radiation of the effective zone of heating extremely catch the anti-radiation body of wax jar.

Preferably, a bracket for bearing the blank to be sintered is arranged in the effective heating area, and a wax unloading groove for guiding the flow of the vapor wax is arranged on the bracket.

Preferably, a plurality of wax unloading grooves are arranged along the bearing surface of the bracket, and the wax unloading grooves are criss-cross.

Preferably, the wax capturing pipeline comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, a first mounting hole is formed in the effective heating area, a second mounting hole is formed in the furnace cylinder body, the first pipe section is connected with the first mounting hole in a matched mode, the third pipe section is connected with the second mounting hole in a matched mode, and the second pipe section is arranged between the effective heating area and the furnace cylinder body.

Preferably, a sealing element is arranged between the pipe wall of the first pipe section and the pipe wall of the second pipe section, and between the pipe wall of the second pipe section and the pipe wall of the third pipe section.

Preferably, one end of the second pipe section, which is close to the third pipe section, is a semi-closed end, a vent hole is formed in the semi-closed end, and the radiation protection body is arranged in the second pipe section and connected with the semi-closed end.

Preferably, the semi-closed end is provided with a mounting portion facing the inside of the second pipe section, and the radiation protection body is arranged on the mounting portion.

Preferably, the radiation preventing body is a heat insulating block made of a heat insulating material or a heat insulating block having a surface coated with a heat insulating coating.

Preferably, a heating body is arranged in the effective heating area, and an air inlet channel for introducing air into the heating area is arranged on the furnace cylinder body.

Preferably, the wax catching pipelines are arranged below the furnace cylinder body, and the number of the wax catching pipelines is multiple.

The utility model discloses a vacuum degreasing sintering furnace, including furnace barrel and insulating layer, the insulating layer will space division in the furnace barrel forms to the effective zone of heating and spills the district, is provided with heat-generating body and bracket in the effective zone of heating, and is provided with the wax catching pipeline that runs through the section of thick bamboo wall of insulating layer and furnace barrel, catches the wax pipeline and will effectively the zone of heating and catch wax jar intercommunication, and catch and be provided with the radiation prevention body in the wax jar. In the technical scheme, the effective heating area and the wax catching tank are communicated by using the wax catching pipeline, when a blank to be sintered is placed in the effective heating area, along with the rise of the temperature in the effective heating area, organic substances such as a forming agent, an adhesive and the like in the blank to be sintered volatilize to form vapor wax, and when current-carrying gas is introduced into the furnace, the vapor wax can directly enter the wax catching tank through the wax catching pipeline along with the current-carrying gas, and can not overflow to an overflow area to be solidified on the inner wall of the low-temperature furnace barrel body, so that the pollution to a furnace body can be effectively reduced, and the influence on the sintering quality of the next blank is reduced. In addition, the anti-radiation body is arranged in the wax catching channel, so that the condensation effect of steam wax in the wax catching tank can be effectively prevented from being influenced after heat in the effective heating area is radiated into the wax catching tank, meanwhile, the influence of high temperature in the effective heating area on the quality of the wax catching pipeline can be prevented, and the service life of the wax catching pipeline is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a vacuum degreasing sintering furnace according to an embodiment of the present invention;

3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 at 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

Fig. 3 is an enlarged view at B in fig. 2.

The reference numbers illustrate:

Reference numerals	Name (R)	Reference numerals	Name (R)
				100	Vacuum degreasing sintering furnace	1144	Air vent
110	Furnace barrel	1145	Third pipe section
				111	Thermal insulation layer	115	Radiation-proof body
112	Effective heating zone	116	Sealing element
				113	Overflow area	117	bracket
114	Wax catching pipeline	118	Mounting plate
				1141	First pipe section	119	Heating body
1142	Second pipe section	200	Wax catching tank
				1143	Semi-closed end

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model mainly aims at providing a vacuum degreasing sintering furnace, which aims to solve the problems that the steam wax generated during dewaxing in the prior art is not thoroughly removed to cause furnace body pollution and sintering quality is low.

Referring to fig. 1 and 2, an embodiment of the present invention provides a vacuum degreasing sintering furnace 100, which includes a furnace barrel 110, an effective heating area 112 formed by enclosing a heat insulation layer 111 and a wax capturing pipeline 114 running through the heat insulation layer 111 and the furnace barrel 110, the effective heating area 112 is communicated with one end of the wax capturing pipeline 114, the other end of the wax capturing pipeline 114 is communicated with a wax capturing tank 200, and is used for discharging vapor wax generated in the effective heating area 112 into the wax capturing tank 200 through the wax capturing pipeline 114, and a radiation-proof body 115 for blocking heat radiation of the effective heating area 112 to the wax capturing tank 200 is arranged in the wax capturing pipeline 114 corresponding to the effective heating area 112.

The material of the thermal insulation layer 111 is preferably carbon felt or other high-temperature thermal insulation materials such as polycrystalline mullite fiber and corundum. The heat insulating layer 111 is arranged in the furnace barrel body 110, so that the space in the furnace barrel can be divided into an effective heating area 112 and an overflow area 113, and a heating body 119 and a bracket 117 for bearing a blank to be sintered are arranged in the effective heating area 112. The furnace cylinder 110 is provided with a gas inlet channel, and the gas entering through the gas inlet channel overflows through an overflow area 113 to reach an effective heating area 112. The heat insulation layer 111 can insulate heat in the effective heating area 112, and the overflow area 113 can homogenize the gas entering the effective heating area 112. It will be appreciated that the insulating layer 111 has a certain porosity that allows for the ingress and egress of gases, while allowing for a certain pressure differential between the effusion region 113 and the active heating region 112 due to the presence of the insulating layer 111. The vapor wax is a gaseous substance formed by volatilizing an organic substance such as a forming agent and a binder in a material to be sintered at a high temperature. In this embodiment, the heating element and the holder are preferably made of graphite.

In the embodiment, the effective heating area 112 and the wax catching tank 200 are communicated by using the wax catching pipeline 114, when the blank to be sintered is placed in the effective heating area 112, along with the rise of the temperature in the effective heating area 112, organic substances such as a forming agent, an adhesive and the like in the blank to be sintered volatilize to form vapor wax, and when a carrier gas is introduced into the furnace, the vapor wax can directly enter the wax catching tank 200 through the wax catching pipeline 114 along with the carrier gas, and cannot overflow to the overflow area 113 to be solidified on the inner wall of the low-temperature furnace cylinder body 110, so that the pollution to a furnace body can be effectively reduced, and the influence on the sintering quality of the next blank can be reduced. In addition, the anti-radiation body 115 is arranged in the wax catching channel, so that the condensation effect of the steam wax in the wax catching tank 200 can be effectively prevented from being influenced after the heat in the effective heating area 112 is radiated into the wax catching tank 200, meanwhile, the influence of the high temperature of the effective heating area 112 on the quality of the wax catching pipeline 114 can be prevented, and the service life of the wax catching pipeline 114 is prolonged.

In order to collect the vapor wax volatilized from the blank to be sintered more thoroughly and efficiently, a wax discharge groove for guiding the flow of the vapor wax is provided on the tray 117. It can be understood that the blank to be sintered is placed on the wax discharge groove, the organic forming machine or the adhesive in the blank to be sintered is gradually vaporized along with the increase of the temperature in the effective heating area 112 and overflows from the pores of the blank to be sintered to form the steam wax, the steam wax flows along the wax discharge groove under the action of gravity, the flowing direction of the steam wax is guided by the trend of the wax discharge groove, so that the steam wax is guided into the wax catching pipeline 114, and the purpose of efficiently collecting the steam wax is achieved.

In one embodiment, the brackets 117 are disposed in the middle of the effective heating area 112, and the number of the brackets 117 may be multiple layers, and the multiple layers of the brackets 117 are spaced apart in the height direction of the vacuum degreasing sintering furnace 100. The furnace barrel body 110 is provided with a support frame, and the support frame passes through the heat insulation layer 111 and then supports the support frame 117. When the bracket 117 is disposed in the middle of the effective heating area 112, the wax discharge groove guides the vapor wax to flow toward the wax trap pipe 114 after the vapor wax falls down along the edge of the bracket 117 through the gap between the bracket 117 and the heat insulating layer 111.

It will be appreciated that a plurality of wax discharge slots are provided along the bearing surface of the carrier 117, and that the plurality of wax discharge slots are criss-cross. Specifically, the bracket 117 is provided with two first-direction wax unloading grooves and one second-direction wax unloading groove. The first direction and the second direction are positioned on the bearing surface and are intersected. The wax unloading groove in the first direction is communicated with the wax unloading groove in the second direction.

In a preferred embodiment, referring to fig. 3, in order to facilitate the detachment and installation, the wax capturing pipeline 114 includes a first pipe section 1141, a second pipe section 1142 and a third pipe section 1145 which are connected in sequence, a first mounting hole is disposed on the effective heating area 112, a second mounting hole is disposed on the furnace body 110, the first pipe section 1141 is connected with the first mounting hole in a matching manner, the third pipe section 1145 is connected with the second mounting hole in a matching manner, and the second pipe section 1142 is disposed between the effective heating area 112 and the furnace body 110, i.e., the second pipe section 1142 is disposed corresponding to the scattering area 113.

Further, to ensure the air tightness of the wax trap 114, seals 116 are provided between the wall of the first pipe section 1141 and the wall of the second pipe section 1142, and between the wall of the second pipe section 1142 and the wall of the third pipe section 1145. It will be appreciated that the first pipe section 1141 is nested with the second pipe section 1142, the second pipe section 1142 is nested with the third pipe section 1145, and the seals 116 disposed between the wall of the first pipe section 1141 and the wall of the second pipe section 1142, and between the wall of the second pipe section 1142 and the wall of the third pipe section 1145, prevent the vapor wax in the wax trap conduit 114 from escaping along the race track in the joint gap between the pipe sections 113 and eventually solidifying on the inner wall of the furnace shell 110. The sealing member 116 is made of a material resistant to a high temperature of 1000 ℃ or higher, such as a graphite sealing ring or a corundum sealing ring.

In addition, one end of the second tube section 1142 close to the third tube section 1145 is a semi-closed end 1143, the semi-closed end 1143 is provided with a ventilation hole 1144 for flowing the vapor wax, and the radiation-proof body 115 is disposed in the second tube section 1142 and connected to the semi-closed end 1143. Specifically, the semi-closed end 1143 is provided with a mounting portion toward the interior of the second tube section 1142, on which the radiation shield 115 is disposed.

It should be noted that the mounting plate 118 is provided in the heat insulating layer 111, the mounting plate 118 is in contact with the bottom of the heat insulating layer 111, the first mounting hole of the heat insulating layer 111 penetrates the mounting plate 118 at the same time, and the first pipe section 1141 is provided on the mounting plate 118. In one embodiment, the mounting plate 118 has a counter-bore, and the end of the first tube segment 1141 adjacent to the mounting plate 118 has a flange that hangs over the counter-bore. A shoulder is disposed at an end of the second pipe section 1142 adjacent to the first pipe section 1141, the sealing element 116 is disposed on the shoulder, and the sealing element 116 is disposed on the first pipe section 1141. Preferably, in order to consider cost and installation, the first pipe section 1141 and the second pipe section 1142 are made of a high temperature resistant material, such as graphite, the third pipe section 1145 is made of a metal material, and the radiation preventing body 115 is disposed in the second pipe section 1142, so that the influence of heat on the third pipe section 1145 can be prevented, and the service life of the third pipe section 1145 can be prolonged.

It is to be understood that the radiation shield 115 has a thermal insulating block supported by a thermal insulating material, or a thermal insulating block surface coated with a thermal insulating coating. The heat insulation material is carbon felt, graphite or corundum ceramics, and the heat insulation coating is preferably a coating with the heat resistance temperature higher than 1000 ℃.

Preferably, the wax catching pipes 114 are arranged below the furnace barrel body 110, the vapor wax can more easily enter the wax catching pipes 114 under the action of gravity, the number of the wax catching pipes 114 is multiple, and preferably two, and the two wax catching pipes 114 are respectively arranged close to two opposite side edges of the bracket 117, so that the vapor wax flowing out of the discharge chute on the bracket 117 can flow into the wax catching pipes 114 as fast as possible, and the diffusion of the vapor wax is reduced. In the present embodiment, the wax trap 200 connected to the vacuum degreasing sintering furnace 100 is a horizontal wax trap 200, and the plurality of wax traps 114 are provided at intervals in the axial direction of the horizontal wax trap 200.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a vacuum degreasing sintering furnace, its characterized in that, including the furnace barrel, set up in the effective zone of heating that forms and the wax catching pipeline that runs through by the insulating layer is enclosed to the furnace barrel, the one end intercommunication of catching the wax pipeline the effective zone of heating, the other end intercommunication of catching the wax pipeline catches the wax jar, and be used for with the steam wax that produces in the effective zone of heating passes through catch the wax pipeline and arrange to in catching the wax jar, it is provided with corresponding in the wax catching pipeline the effective zone of heating and be used for the separation the heat radiation of the effective zone of heating extremely catch the anti-radiation body of wax jar.

2. The vacuum degreasing sintering furnace as set forth in claim 1, wherein a tray for receiving the billet to be sintered is provided in the effective heating zone, and a wax discharge groove for guiding the flow of the vapor wax is provided in the tray.

3. The vacuum degreasing sintering furnace as set forth in claim 2, wherein a plurality of the wax discharge grooves are provided along the bearing surface of the bracket, and the plurality of the wax discharge grooves are criss-cross.

4. The vacuum degreasing sintering furnace as set forth in any one of claims 1 to 3, wherein the wax capturing pipeline comprises a first pipe section, a second pipe section and a third pipe section which are connected in sequence, wherein the effective heating zone is provided with a first mounting hole, the furnace body is provided with a second mounting hole, the first pipe section is connected with the first mounting hole in a matching manner, the third pipe section is connected with the second mounting hole in a matching manner, and the second pipe section is arranged between the effective heating zone and the furnace body.

5. The vacuum degreasing sintering furnace of claim 4, wherein a seal is disposed between the tube wall of the first tube segment and the tube wall of the second tube segment, and between the tube wall of the second tube segment and the tube wall of the third tube segment.

6. The vacuum degreasing sintering furnace as set forth in claim 5, wherein the end of the second tube section adjacent to the third tube section is a semi-closed end, the semi-closed end is provided with ventilation holes, and the radiation preventing body is disposed in the second tube section and connected to the semi-closed end.

7. the vacuum degreasing sintering furnace as set forth in claim 6, wherein the semi-closed end is provided with a mounting portion toward an inside of the second tube section, and the radiation-proof body is provided on the mounting portion.

8. The vacuum degreasing sintering furnace as set forth in any one of claims 1 to 3, wherein the radiation preventing body is a heat insulating block made of a heat insulating material or a heat insulating block having a surface coated with a heat insulating coating.

9. The vacuum degreasing sintering furnace as set forth in any one of claims 1 to 3, wherein a heating element is provided in the effective heating zone, and an air inlet passage for introducing air into the effective heating zone is provided in the furnace tube body.

10. The vacuum degreasing sintering furnace as set forth in any one of claims 1 to 3, wherein the wax trap conduit is provided below the furnace barrel body, and the number of the wax trap conduit is plural.