Ventilation structure, material box and vacuum degreasing sintering furnace

Abstract

The utility model discloses a ventilation structure, a workbin and a vacuum degreasing sintering furnace, the ventilation structure comprises a first plate and a second plate, the first plate and the second plate are stacked, and a ventilation channel is arranged between the first plate and the second plate; the ventilation channel comprises an air inlet cavity and a plurality of first exhaust channels communicating with the air inlet cavity, and the first exhaust channels are arranged on one side of the air inlet cavity side by side. The ventilation channel further comprises a plurality of second exhaust channels, the second exhaust channels are arranged in the extending direction of the first exhaust channels, the first exhaust channels are communicated through the second exhaust channels, the second exhaust channels are provided with a plurality of exhaust holes, the exhaust holes correspond to the first exhaust channels, and the exhaust holes are communicated with the outside. The material box is provided with a sealing door, and the ventilation structure is applied to a sealing plate. The material box is applied to the vacuum degreasing sintering furnace.

Description

Technical Field

[0001] This utility model relates to the field of vacuum degreasing sintering furnace production technology, and in particular to a sealed door and material box with an air inlet channel. Background Technology

[0002] In the metal powder injection molding (MPI) process, the green body consists of metal powder and a binder. However, the binder must be removed before sintering to obtain a completely metallic phase. The main component of the binder is polyoxymethylene (POM) (70-95%), with other components being high-melting-point materials with good heat and oxygen resistance, such as PP and PE. Therefore, a debinding process is required in the MPI process to remove the binder from the green body. This debinding process must ensure that the binder is gradually discharged through tiny channels in different parts of the green body without damaging its shape.

[0003] In addition to insulation material and heating element, the current vacuum degreasing sintering furnace also has a material box. The inside of the material box is connected to the degreasing pipe under the furnace. A gas filling device is installed outside the material box. The gas filling pipe continuously fills the protective gas into the material box, creating a pressure difference between the inside and outside of the material box, which promotes the unidirectional flow of gas. As the degreasing temperature rises, the binder is converted into a gaseous state and reaches the surface of the part through diffusion and penetration through the pores.

[0004] However, the existing feed hoppers cannot provide a uniform air intake mechanism for the vacuum debinding sintering furnace, resulting in some areas or parts inside the feed hopper still having a small amount of binder remaining. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a ventilation structure, a material box, and a vacuum degreasing sintering furnace. The sealing door has crisscrossing air intake channels, which can make the air intake of the material box more uniform. The structure is simple and easy to disassemble. The split structure of the sealing door also makes it easier for workers to clean the air intake channels.

[0006] In a first aspect, a ventilation structure according to an embodiment of the present utility model includes: a first plate and a second plate, the first plate and the second plate being stacked, and a ventilation channel being provided between the first plate and the second plate;

[0007] The ventilation channel includes an air intake chamber and multiple first exhaust channels that connect to the air intake chamber, with the multiple first exhaust channels arranged side by side on one side of the air intake chamber;

[0008] The ventilation channel also includes multiple second exhaust channels, which are arranged along the extension direction of the first exhaust channel. The second exhaust channels connect the multiple first exhaust channels. Each second exhaust channel is provided with multiple exhaust holes, which correspond to the first exhaust channels and are connected to the outside.

[0009] According to a ventilation structure of an embodiment of the present utility model, a first plate is provided with an air inlet groove for forming an air inlet chamber, and a second plate is provided with an air inlet opposite to the air inlet groove, the air inlet being connected to the air inlet groove and penetrating both sides of the second plate.

[0010] According to a ventilation structure of an embodiment of the present utility model, the first plate is provided with an air inlet groove and a plurality of first exhaust grooves, the air inlet groove is used to form an air inlet chamber, and the first exhaust grooves are used to form a first exhaust channel.

[0011] According to a ventilation structure of an embodiment of the present invention, the second plate is provided with a plurality of second exhaust grooves, which are used to form a second exhaust channel.

[0012] According to a ventilation structure of an embodiment of the present utility model, a second plate is provided with a plurality of protruding strips on the side facing away from the first plate, the protruding strips corresponding to the second exhaust groove, and the protruding strips are provided with exhaust holes.

[0013] According to an embodiment of the present invention, a ventilation structure is provided with a first protrusion strip, the two sides of which are used to form two adjacent first exhaust channels; a second plate is provided with a second protrusion strip, the two sides of which are used to form two adjacent second exhaust channels; the first protrusion strip and the second protrusion strip are connected and fixed by bolts.

[0014] According to an embodiment of the present invention, in a ventilation structure, the first plate and the second plate are graphite plates.

[0015] According to an embodiment of the present invention, a ventilated structure is provided with a lifting opening on the side of the first plate facing away from the second plate.

[0016] According to an embodiment of the present invention, a ventilation structure has at least the following beneficial effects: A first exhaust duct and a second exhaust duct form a crisscrossing air intake structure, wherein multiple first exhaust ducts are spaced apart, and the second exhaust ducts are spaced apart along the length of the first exhaust ducts. Gas enters through the first exhaust duct, flows along the groove shape of the first exhaust duct, and sequentially enters multiple second exhaust ducts, then exits through the exhaust holes of the second exhaust ducts into the material bin. As shown in the figure, multiple exhaust holes are provided on the second exhaust ducts, and these exhaust holes are spaced apart along the length of the second exhaust ducts and corresponding to the first exhaust ducts, allowing the gas to be evenly distributed into the material bin.

[0017] Secondly, according to an embodiment of the present invention, a material box is provided with a sealing door, and the sealing door uses the above-mentioned ventilation structure, which is used to ventilate the material box.

[0018] A material bin according to an embodiment of the present invention has at least the following beneficial effects: A first exhaust channel and a second exhaust channel form a crisscrossing air intake structure, wherein multiple first exhaust channels are spaced apart, and the second exhaust channels are spaced apart along the length of the first exhaust channels. Gas enters from the first exhaust channels, flows along the groove shape of the first exhaust channels, and sequentially enters multiple second exhaust channels, then exits from the exhaust holes of the second exhaust channels into the material bin. As shown in the figure, multiple exhaust holes are provided on the second exhaust channels, and these exhaust holes are spaced apart along the length of the second exhaust channels and corresponding to the first exhaust channels, so that the gas can be evenly distributed into the material bin.

[0019] Thirdly, according to an embodiment of the present invention, a vacuum degreasing sintering furnace includes an outer casing, which utilizes the aforementioned material bin.

[0020] A vacuum degreasing sintering furnace according to an embodiment of the present invention has at least the following beneficial effects: A first exhaust duct and a second exhaust duct form a crisscrossing air intake structure, wherein multiple first exhaust ducts are spaced apart, and the second exhaust ducts are spaced apart along the length of the first exhaust ducts. After entering through the first exhaust duct, the gas flows along the groove shape of the first exhaust duct and sequentially enters multiple second exhaust ducts, then exits through the exhaust holes of the second exhaust ducts into the material bin. As shown in the figure, multiple exhaust holes are provided on the second exhaust ducts, and these exhaust holes are spaced apart along the length of the second exhaust ducts and corresponding to the first exhaust ducts, so that the gas can be evenly distributed into the material bin.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a structural diagram of the sealing door according to an embodiment of the present utility model;

[0024] Figure 2 This is a first-view exploded view of the sealing door according to an embodiment of the present utility model;

[0025] Figure 3 This is a second-view exploded view of the sealing door according to an embodiment of the present utility model;

[0026] Figure 4 This is an exploded view of the material box according to an embodiment of the present utility model;

[0027] Figure 5 This is a cross-sectional view of the material box according to an embodiment of the present utility model;

[0028] Figure 6 This is an embodiment of the present utility model. Figure 5 A magnified view of the area marked A.

[0029] Explanation of reference numerals in the attached figures:

[0030] First plate 100; First exhaust groove 110; Air inlet groove 120; First protrusion 130; Lifting opening 140;

[0031] Second plate 200; Second exhaust groove 210; Air inlet 220; Protruding part 230; Exhaust hole 240; Second protruding part 250;

[0032] 300 hopper; 310 divider;

[0033] Sealed door 400. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 3This utility model embodiment provides a ventilation structure and a sealed door 400 using the ventilation structure, the ventilation structure being disposed on the sealed door 400. Specifically, the sealed door 400 includes a first plate 100 and a second plate 200 that are detachably connected, the first plate 100 and the second plate 200 being stacked, and a ventilation channel being provided between the first plate 100 and the second plate 200.

[0039] The ventilation channel includes an air intake chamber and multiple first exhaust channels connected to the air intake chamber. The multiple first exhaust channels are arranged side by side on one side of the air intake chamber. The ventilation channel also includes multiple second exhaust channels, which are arranged along the extension direction of the first exhaust channels. The second exhaust channels connect the multiple first exhaust channels. The second exhaust channels are provided with multiple exhaust holes 240, which correspond to the first exhaust channels and are connected to the outside.

[0040] The first and second exhaust channels form a crisscrossing air intake structure. Multiple first exhaust channels are spaced apart, while the second exhaust channels are spaced apart along the length of the first exhaust channels. Gas enters through the first exhaust channels, flows along the channel shape of the first exhaust channels, and sequentially enters the multiple second exhaust channels. It then exits through the exhaust holes 240 of the second exhaust channels into the material bin 300. As shown in the figure, multiple exhaust holes 240 are provided on the second exhaust channels, and these exhaust holes 240 are spaced apart along the length of the second exhaust channels and correspond to the first exhaust channels, allowing the gas to be evenly distributed into the material bin 300. Preferably, both the first plate 100 and the second plate 200 are graphite plates.

[0041] According to some embodiments of this application, such as Figure 2 As shown, the first plate 100 is provided with an air inlet groove 120, which forms an air inlet chamber. The second plate 200 is provided with an air inlet 220 opposite to the air inlet groove 120, which connects to the air inlet groove 120 and extends through both sides of the second plate 200. Specifically, the first plate 100 is provided with an air inlet groove 120 and multiple first exhaust grooves 110. The air inlet groove 120 forms an air inlet chamber, and the first exhaust grooves 110 form a first exhaust channel. As shown, the second plate 200 is provided with multiple second exhaust grooves 210, which form a second exhaust channel.

[0042] Furthermore, the second plate 200 has multiple protruding strips 230 on the side facing away from the first plate 100. The protruding strips 230 correspond to the second exhaust grooves 210, and the protruding strips 230 are provided with exhaust holes 240. The first plate 100 is provided with a first protruding strip 130, and the two sides of the first protruding strip 130 are used to form two adjacent first exhaust channels. The second plate 200 is provided with a second protruding strip 250, and the two sides of the second protruding strip 250 are used to form two adjacent second exhaust channels. The first protruding strip 130 and the second protruding strip 250 are connected and fixed by bolts.

[0043] It is understood that the first and second exhaust channels are respectively located on the first plate 100 and the second plate 200. By providing air intake structures on the plates themselves and fixing them with bolts, the graphite powder generated by friction between the first plate 100 and the second plate 200, which are made of graphite material, can be avoided, thus preventing the gas entering the material box 300 from being mixed with graphite powder. Furthermore, the graphite plates are also protected from wear due to friction. Moreover, the first plate 100 and the second plate 200 are detachable, facilitating subsequent cleaning by workers and maintaining the cleanliness of the air intake structure. Further, the first and second plates are separate units, which allows for easy drilling and milling of grooves during the processing of the door panel to form the air intake groove of this application.

[0044] According to some embodiments of this application, a lifting opening 140 is provided on the side of the first plate 100 facing away from the second plate 200 to facilitate workers in disassembling or transferring the sealing door 400.

[0045] Reference Figures 4 to 6 This utility model embodiment provides a material bin 300, which uses a sealing door 400 with the above-mentioned ventilation structure. The two sealing doors 400 are arranged opposite each other. An external air supply device provides gas to the inside of the material bin 300 through the ventilation structure on the sealing door 400. The ventilation structure allows the gas to enter the inside of the material bin 300 evenly.

[0046] Furthermore, such as Figure 2 As shown and Figure 6 As shown, the protruding strips 230 on the two oppositely arranged sealing doors 400 can also be used to support the partition plate 310 inside the material box 300. The partition plate 310 divides the space inside the material box 300 into multiple air intake layers. In conjunction with the ventilation structure, the gas can enter the material box 300 evenly and reach every corner inside the material box 300.

[0047] This utility model embodiment also provides a vacuum degreasing sintering furnace (not shown in the figure) that uses the above-mentioned material box 300. Specifically, the vacuum degreasing sintering furnace includes an outer box, and the material box 300 is disposed inside the outer box.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ventilation structure, characterized in that, It includes a first plate and a second plate, which are stacked together, and a ventilation channel is provided between the first plate and the second plate; The ventilation channel includes an air intake chamber and a plurality of first exhaust channels communicating with the air intake chamber, wherein the plurality of first exhaust channels are arranged side by side on one side of the air intake chamber; The ventilation channel also includes multiple second exhaust channels, which are arranged along the extension direction of the first exhaust channel. The second exhaust channels connect the multiple first exhaust channels. Each second exhaust channel is provided with multiple exhaust holes, which correspond to the first exhaust channels and are connected to the outside.

2. The ventilation structure according to claim 1, characterized in that, The first plate is provided with an air inlet groove, which is used to form the air inlet chamber. The second plate is provided with an air inlet opposite to the air inlet groove, which is connected to the air inlet groove and extends through both sides of the second plate.

3. The ventilation structure according to claim 1, characterized in that, The first plate is provided with an air inlet groove and a plurality of first exhaust grooves. The air inlet groove is used to form the air inlet chamber, and the first exhaust groove is used to form the first exhaust passage.

4. The ventilation structure according to claim 1, characterized in that, The second plate is provided with a plurality of second exhaust grooves, which are used to form the second exhaust channel.

5. A ventilation structure according to claim 4, characterized in that, The second plate has a plurality of raised strips on the side facing away from the first plate. The raised strips correspond to the second exhaust groove and the exhaust holes are provided on the raised strips.

6. The ventilation structure according to claim 1, characterized in that, The first plate is provided with a first protrusion, and the two sides of the first protrusion are used to form two adjacent first exhaust channels. The second plate is provided with a second protrusion, and the two sides of the second protrusion are used to form two adjacent second exhaust channels. The first protrusion and the second protrusion are fixed together by bolts.

7. A ventilation structure according to claim 1, characterized in that, The first plate and the second plate are graphite plates.

8. A ventilation structure according to claim 1, characterized in that, The first plate has a lifting opening on the side facing away from the second plate.

9. A material bin, characterized in that, The device includes a sealing door, which is provided with a ventilation structure according to any one of claims 1 to 8, the ventilation structure being used to ventilate the material bin.

10. A vacuum degreasing sintering furnace, characterized in that, It includes an outer casing, and the outer casing contains a material box as described in claim 9.

Images