Multi-zone degreasing and sintering integrated furnace

Abstract

The utility model relates to the technical field of ceramic material degreasing and sintering, and discloses a multi-area degreasing and sintering integrated furnace which comprises a furnace body, a heating part installed in the furnace body, a heat preservation layer and a material box, the material box is located in the heat preservation layer, and the bottom of the material box is connected with an exhaust device; furnace doors are installed at the two opposite ends of the furnace body, each furnace door is provided with an air inlet pipe, air inlet pipes are arranged on the peripheral side of the furnace body at intervals, and baffle valves are installed on the air inlet pipes; an air guide box is installed in the middle of the material box in the length direction and divides the material box into a front cavity and a rear cavity, air holes are evenly distributed in side plates, close to the front cavity and the rear cavity, of the air guide box, and the bottom of the air guide box is communicated with the exhaust device. Gas in the furnace body can be more uniformly dispersed in the material box under the guidance of the gas guide box.

Description

Technical Field

[0001] This application relates to the technical field of degreasing and sintering of ceramic materials, and in particular to a multi-zone degreasing and sintering integrated furnace. Background Technology

[0002] The vacuum debinding and sintering integrated furnace is used to debind advanced ceramic substrates and shells (such as alumina and aluminum nitride) under specific temperature and atmosphere conditions. This process typically involves two stages: a) the decomposition of the binder as the temperature rises (a chemical reaction); and b) the physical mass and heat transfer process, where gases from the binder decomposition are transferred to the surface of the green body through interconnected pores formed by solvent debinding. The purpose of debinding is to completely remove the binder components from the green body and to pre-sinter the debinded green body to give it a certain strength. After debinding, the ceramic pre-products are sintered at high temperature under vacuum or a specific atmosphere to enhance the density and strength of the ceramic, thereby improving its overall performance. Both stages are usually carried out in a molybdenum-filled hopper, requiring precise control of temperature and atmosphere. The hopper must also have a long lifespan and structural stability after long-term use to prevent significant deformation and workpiece damage under high temperature and positive pressure atmospheres.

[0003] Vacuum debinding and sintering integrated furnaces are widely used in high-power electronic devices and precision semiconductor components, and are developing towards larger sizes, more layers, and higher linewidth ratios. Currently, the airflow direction of molybdenum material boxes is mostly a single flow direction, such as front and rear air inlet and middle outlet, front air inlet and rear outlet, top air inlet and bottom outlet, left air inlet and right outlet, or simply diffused air from the side plate of the box to the bottom outlet.

[0004] The combined effect of the internal and external structure of the material bin on airflow direction was not considered, resulting in uneven airflow distribution across the ceramic workpiece surface and impacting the process. Simultaneously, it significantly affects the temperature uniformity within the material bin, typically by ±10℃. During the heating process, in addition to uneven airflow distribution, factors such as heat capacity, insulation, and material handling methods can lead to localized temperature differences of ±20℃ or more. Utility Model Content

[0005] To further control the airflow direction inside and outside the material box, this application provides a multi-zone degreasing and sintering integrated furnace.

[0006] This application provides a multi-zone debinding and sintering integrated furnace, which adopts the following technical solution:

[0007] A multi-zone degreasing and sintering integrated furnace includes a furnace body, a heating section installed inside the furnace body, an insulation layer, and a material box. The material box is located inside the insulation layer, and an exhaust device is connected to the bottom of the material box.

[0008] Furnace doors are installed at opposite ends of the furnace body, and each furnace door is equipped with an air inlet pipe. Air inlet pipes are also spaced apart around the furnace body, and baffle valves are installed on the air inlet pipes.

[0009] An air guide box is installed at the middle position along the length of the material box, which divides the material box into a front chamber and a rear chamber. Air holes are evenly distributed on the side plates of the air guide box near the front and rear chambers. The bottom of the air guide box is connected to the exhaust device.

[0010] By adopting the above technical solution, there are multiple air inlet pipes at the front and rear of the furnace body and around the furnace body, which realizes multi-directional gas dispersion. The airflow can be evenly distributed to the surface of ceramic workpieces, improving the temperature uniformity in the material box. The gas disperses in the material box and enters the gas guide box. Since the gas guide box is connected to both the front and rear chambers, the gas can also return to the front or rear chamber. The gas in the front and rear chambers can be exchanged in the gas guide box. The gas flow direction of the furnace body can be more evenly dispersed in the material box by the guidance of the gas guide box. The gas is also uniformly discharged from the furnace body by the guidance of the gas guide box, further ensuring the uniformity of airflow to the workpiece and temperature uniformity. Since the air inlets are equipped with baffle valves, the number and volume of air entering from different directions can also be adjusted.

[0011] Optionally, the exhaust device includes a gas guide pipe and a gas collector pipe. The bottom of the gas guide box has an exhaust hole. The gas guide pipe and the exhaust hole of the gas guide box are connected, and the gas guide pipe and the exhaust hole correspond one-to-one. The gas collector pipe guides the gas to be discharged from the furnace body.

[0012] By adopting the above technical solution, the gas can be discharged from the material box more smoothly, avoiding the accumulation of gas in the material box and improving the safety of the degreasing sintering process.

[0013] Optionally, the hopper includes a main frame, side plates, a cover plate, a door, and a bottom plate installed on the main frame, the air guide box is installed on the bottom plate, and air inlets are distributed on the door and side plates.

[0014] By adopting the above technical solution, the setting of the air inlet hole allows the gas to enter the material box more evenly, improving the uniformity of the degreasing and sintering process; at the same time, the structural design of the material box also facilitates maintenance and replacement of parts.

[0015] Optionally, the side panel includes an inner panel and an outer panel, with ribs installed between the inner and outer panels, and air inlets distributed on the inner panel.

[0016] By adopting the above technical solution, the rib design enhances the strength and stability of the side plate, while the air inlet holes are distributed on the inner plate, allowing the gas to enter the material box more evenly through the side plate.

[0017] Optionally, a support structure is installed inside the material box. The support structure includes a row of vertical rods, with a horizontal rod connecting adjacent vertical rods. The vertical rods close to the main frame are used to support the main frame, and the upper ends of the other vertical rods abut against the cover plate. The lower ends of the vertical rods are connected to support seats.

[0018] By adopting the above technical solution, the support structure is used to support the main frame and can support the cover plate, reducing the collapse and deformation of the cover plate under high temperature and the difference between the inside and outside of the material box. The setting of the support structure also allows the firing plate to be placed stably in the material box, avoiding quality problems caused by the shaking of the firing plate during the degreasing and sintering process.

[0019] Optionally, both the vertical rod and the main frame are equipped with support plates for supporting the firing plate, and the support plates are spaced apart along the vertical direction.

[0020] By adopting the above technical solution, the tray design makes it easier to place and remove the firing plate, while also improving the stability of the firing plate.

[0021] Optionally, a support structure is installed on the base plate. The support structure includes three rows of support rods arranged along the width direction of the material box. Support blocks for supporting the firing plate are installed on the support rods. The support blocks are distributed in multiple rows along the circumference of the support rods. Each row of support blocks is spaced apart along the vertical direction of the support rods, and the height positions of the support blocks in adjacent rows are different.

[0022] By adopting the above technical solution, the support rod provides blocks of various heights. By rotating the support rod, the firing plate can be placed at different heights as needed, which improves the flexibility of the degreasing and sintering process.

[0023] Optionally, the support rod includes an outer rod and an inner rod. The outer rod is rotatably mounted on the base plate, and the inner rod is rotatably mounted on the outer rod. The support blocks of the outer rod and the inner rod are distributed in two rows. The outer rod has a clearance groove for the rotation of the support blocks of the inner rod, and the support blocks of the inner rod extend out of the outer rod.

[0024] The inner rod rotates to form a first state and a second state. In the first state, the support block of the inner rod and the support block of the outer rod form a 90° angle. In the second state, the support blocks of the inner rod and the support blocks of the outer rod are in the same column and are staggered.

[0025] By adopting the above technical solution, the position and height of the support block can be flexibly adjusted by rotating the outer and inner rods, thereby changing the height of the support plate. The number of layers of the firing plate can also be increased or decreased, improving the adaptability and flexibility of the degreasing and sintering process.

[0026] Optionally, a fixing rod is connected between the row of support rods, and the fixing rod has a slot, and the fixing rod and the support block of the support rod are inserted into each other.

[0027] By adopting the above technical solution, the design of the fixing rod and the slot makes the support structure more stable. The row of support rods restrict each other, and the support rods cannot rotate when supporting the firing plate. The contact between the fixing rod and the firing plate can also increase the support area of ​​the firing plate.

[0028] In summary, this application includes at least one of the following beneficial effects:

[0029] 1. Through the design of the air guide box, air inlet and support structure, the gas can enter the material box more evenly and the sintering plate can be placed more stably in the material box, thereby improving the uniformity and efficiency of the degreasing and sintering process.

[0030] 2. Through the design of the rotation of the outer and inner rods, the distribution of the support blocks, and the fixing rods, the sintering plate can be placed at different heights and positions as needed, improving the flexibility and adaptability of the degreasing and sintering process. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the external structure of the furnace body according to Embodiment 1 of this application;

[0032] Figure 2 This is a schematic diagram of the structure after the furnace door is removed in Embodiment 1 of this application;

[0033] Figure 3 This is a schematic diagram of the external structure of the material box in Embodiment 1 of this application;

[0034] Figure 4 This is a schematic diagram of the main frame structure of Embodiment 1 of this application;

[0035] Figure 5 yes Figure 3 Enlarged view of point A;

[0036] Figure 6 This is a schematic diagram of the overall structure of the upper door of Embodiment 1 of this application;

[0037] Figure 7 This is a structural schematic diagram illustrating the thickness of the side plate in Embodiment 1 of this application;

[0038] Figure 8 This is a schematic diagram of the overall structure of the inner plate in Embodiment 1 of this application;

[0039] Figure 9 This is a schematic diagram of the air guide box installed on the main frame in Embodiment 1 of this application;

[0040] Figure 10This is a schematic diagram of the overall structure of the exhaust device according to Embodiment 1 of this application;

[0041] Figure 11 This is a schematic diagram of the installation position of the support structure in Embodiment 1 of this application;

[0042] Figure 12 This is a schematic diagram of the overall structure of the support structure in Embodiment 1 of this application;

[0043] Figure 13 This is a schematic diagram of the structure of the box door of Embodiment 1 of this application with part of the box door, side panel and cover removed;

[0044] Figure 14 This is a schematic diagram of the overall structure of the cover plate support assembly according to Embodiment 2 of this application;

[0045] Figure 15 This is a schematic diagram of the overall structure of the cover plate support assembly installed on the material box according to Embodiment 2 of this application;

[0046] Figure 16 This is a schematic diagram of the distribution of the support structure in the material box according to Embodiment 3 of this application;

[0047] Figure 17 This is a schematic diagram of the overall structure of the support rod in Embodiment 3 of this application;

[0048] Figure 18 This is a partially exploded schematic diagram of a fixed rod fixing a row of support rods in Embodiment 3 of this application;

[0049] Figure 19 This is a schematic cross-sectional view of the support rod in Embodiment 3 of this application;

[0050] Figure 20 This is a schematic diagram of Embodiment 3 of this application, illustrating the structure in which the heights and positions of the two rows of firing plates are inconsistent.

[0051] Explanation of reference numerals in the attached drawings: 100, furnace body; 110, furnace door; 120, air inlet pipe; 130, support rod; 140, guide bar; 200, insulation layer; 300, material bin; 310, main frame; 311, vertical beam; 312, horizontal beam; 313, fixing nail; 320, side plate; 321, inner plate; 322, outer plate; 323, rib; 330, cover plate; 340, box door; 341, hanging groove; 342, baffle; 350, bottom plate; 351, through hole; 400, exhaust device; 410, air guide pipe; 420, manifold; 5 00. Air guide box; 600. Support structure; 610. Vertical rod; 611. Connecting rod; 620. Horizontal rod; 630. Support base; 631. First support plate; 632. Second support plate; 601. Support rod; 602. Support block; 6021. Screw; 6022. Threaded rod; 603. Fixing rod; 6031. Slot; 6011. Outer rod; 6012. Inner rod; 604. Relief groove; 700. Support plate; 800. Burning plate; 900. Cover plate support assembly; 910. Support column; 920. Connecting block; 930. Rib plate. Detailed Implementation

[0052] The following is in conjunction with the appendix Figure 1-20 This application will be described in further detail.

[0053] Example 1

[0054] Embodiment 1 of this application discloses a multi-zone degreasing and sintering integrated furnace. (Refer to...) Figure 1 and Figure 2 A multi-zone degreasing and sintering integrated furnace includes a furnace body 100, a heating element, an insulation layer 200, and a material bin 300 installed within the furnace body 100. The material bin 300 is installed at the center of the insulation layer 200. Furnace doors 110 are installed at opposite ends of the furnace body 100, and both doors 110 are equipped with insulation layers 200 and auxiliary heating layers. Each door 110 has one air inlet pipe 120. Two air inlet pipes 120 are located at the top of the furnace body 100, and one air inlet pipe 120 is located on each of the left and right sides of the furnace body 100. The angle between the left and right air inlet pipes 120 and the top of the furnace body 100 is 120°. Each air inlet pipe 120 is equipped with a baffle valve, allowing independent control of each air inlet pipe 120. Gas can enter the furnace body 100 from different directions. The gas intake is controlled according to the number of air inlet pipes 120 used. The air inlet pipes 120 are connected to air pumps, which can also control the exhaust speed, creating a pressure difference inside and outside the material box 300 and promoting airflow. The heating element, insulation layer 200, and auxiliary heating layer inside the furnace body 100 are controlled to ensure uniform distribution of atmosphere and temperature within the material box 300. The control of the heating element, insulation layer 200, and auxiliary heating layer inside the furnace body 100 is existing technology, and this application does not make any improvements to it, so it will not be described in detail.

[0055] Reference Figure 2 The furnace body 100 has a support rod 130 and a guide bar 140 inserted into the support rod 130. The support rod 130 penetrates the insulation layer 200, and the guide bar 140 is located inside the insulation layer 200. The material box 300 is installed on the guide bar 140.

[0056] Reference Figure 3 and Figure 4 The material bin 300 includes a main frame 310 and side plates 320, cover plates 330, bin doors 340, and a bottom plate 350 installed on the main frame 310. The main frame 310 is the main supporting structure 600 of the material bin 300. The main frame 310 includes multiple vertical beams 311 fixedly installed on the bottom plate 350. A crossbeam 312 connects the upper ends of adjacent vertical beams 311. The side plates 320 are fixedly installed on the vertical beams 311. There are two cover plates 330, which are fixedly installed on the crossbeams 312 respectively. The cover plates 330 are used to prevent airflow and temperature field from directly impacting the inner wall of the furnace body 100. Ribs 323 are fixedly installed on the upper surface of the cover plates 330, which can also prevent the cover plates 330 from expanding at high temperatures and contacting the heater, thus preventing a short circuit.

[0057] Reference Figure 3 Specifically, the material bin 300 has an opening at both ends, and the door 340 is used to seal the opening. One opening of the material bin 300 corresponds to two doors 340, which are joined vertically and are respectively hung on the vertical beam 311 located at the opening of the material bin 300. Two handles are installed on each door 340 for easy handling.

[0058] Reference Figure 5 A fixing nail 313 is fixedly installed on the vertical beam 311, and the box door 340 has a hanging groove 341, and the box door 340 is hung on the fixing nail 313. When installing the box door 340, first hang one box door 340 on the lower part of the material box 300, and then hang the other box door 340 on the upper part of the material box 300.

[0059] Reference Figure 6 A baffle 342 is fixedly connected to the lower end of the box door 340 located on the upper part of the material box 300. After the lower box door 340 of the material box 300 is installed, the upper box door 340 is then installed. The baffle 342 is partially attached to the outer side wall of the lower box door 340, so that the baffle 342 also plays a role in fixing the lower box door 340 of the material box 300.

[0060] Reference Figure 7 and Figure 8Specifically, the side plate 320 includes an inner plate 321 and an outer plate 322. The inner plate 321 and the outer plate 322 are fixedly connected by several ribs 323. The ribs 323 are spaced along the length of the inner plate 321, and the design of the ribs 323 leaves a gap between the inner plate 321 and the outer plate 322. Air inlets 510 are distributed on the inner plate 321. When the gas in the furnace body 100 diffuses into the material box 300, the gas can enter the gap between the inner plate 321 and the outer plate 322 and enter the material box 300 through the air inlets 510.

[0061] Reference Figure 9 and Figure 10 An air guide box 500 is installed at the middle of the base plate 350 along its length, dividing the material box 300 into a front chamber and a rear chamber. The air guide box 500 is a hollow cuboid structure. Air holes 510 are evenly distributed on both side plates 320 near the front and rear chambers of the air guide box 500. An exhaust port is provided at the bottom of the air guide box 500. Four through holes 351 are also provided on the base plate 350 to communicate with the exhaust ports, with each through hole corresponding to one of the exhaust ports. After the material box 300 is installed on the base plate 350, an exhaust device 400 is connected to the material box 300 through the base plate 350.

[0062] Reference Figure 10 The exhaust device 400 includes multiple air guide pipes 410 and a collection pipe 420. The multiple air guide pipes 410 and the same collection pipe 420 are connected. There are four air guide pipes 410. The air guide pipes 410 and the exhaust holes of the air guide box 500 correspond one-to-one. The collection pipe 420 is used to lead the gas out of the furnace body 100.

[0063] Reference Figure 11 and Figure 12Furthermore, a support structure 600 is installed inside the material bin 300. The support structure 600 includes a row of vertical rods 610, with a horizontal rod 620 connecting the lower ends of adjacent vertical rods 610. A support base 630 connects the lower end of the vertical rod 610 and the horizontal rod 620, and the support base 630 is fixedly connected to the base plate 350. The horizontal beam 312 near the opening of the material bin 300 abuts against the upper end of one of the vertical rods 610, so that the vertical rod 610 near the main frame 310 supports the horizontal beam 312 of the main frame 310. The upper ends of the remaining vertical rods 610 abut against the cover plate 330, and the vertical rods 610 also support the cover plate 330. The support base 630 includes a first support plate 631 and a second support plate 632. The first support plate 631 is a U-shaped plate, and the second support plate 632 is an L-shaped plate. The two ends of the first support plate 631 and the second support plate 632 are fixedly connected. The second support plate 632 is partially attached to the base plate 350 and fixedly connected to the base plate 350. The air guide box 500 is located between two adjacent vertical rods 610. A connecting rod 611 is fixedly connected between the two vertical rods 610 near the air guide box 500. The connecting rod 611 abuts against the cover plate 330, strengthening the support effect of the support structure 600 on the entire material box 300.

[0064] Reference Figure 12 and Figure 13 The vertical rod 610 and vertical beam 311 near the front chamber are each equipped with a support plate 700 for supporting the firing plate 800. The support plates 700 are spaced apart in the vertical direction. The support plate 700 has an L-shaped structure. One side of the support plate 700 is fixedly installed on the vertical rod 610 or vertical beam 311, and the other side of the support plate 700 is used to support the firing plate 800.

[0065] The implementation principle of a multi-zone degreasing and sintering integrated furnace in Embodiment 1 of this application is as follows:

[0066] The heating element provides the required heat, while the insulation layer 200 ensures temperature stability within the furnace body 100. The exhaust device 400 connected to the bottom of the material box 300 allows the gas inside the furnace body 100 to flow. The design of each air inlet pipe 120 on the furnace body 100 allows the gas to enter the furnace body 100 along a predetermined path and be precisely controlled by the baffle valve 342. The air guide box 500 ensures the uniform distribution and directional discharge of the gas within the material box 300, enabling the gas to be evenly distributed and directionally discharged within the multi-chamber, relatively large-space furnace body 100, thus ensuring the uniformity of the degreasing and sintering process.

[0067] Example 2

[0068] The difference between Example 2 and Example 1 is that a cover plate support assembly 900 is also installed inside the material bin 300; the rest of the structure and principle are basically the same. The cover plate support assembly 900 is used to support the cover plate 330 and resist the collapse and deformation of the cover plate 330 under high temperature and pressure difference inside and outside the material bin 300.

[0069] Specifically, refer to Figure 14 The cover plate support assembly 900 includes a support column 910, a connecting block 920 fixedly installed on the upper end of the support column 910, and stiffening plates 930 fixedly installed on the connecting block 920. A set of cover plate support assemblies 900 has four stiffening plates 930. One end of each stiffening plate 930 is fixedly connected to the connecting block 920, and the other end is fixedly connected to the crossbeam 312. The four stiffening plates 930 form an X shape. The stiffening plates 930 are in contact with the lower surface of the cover plate 330, and the stiffening plates 930 can also be fixedly connected to the cover plate 330 by bolts.

[0070] Reference Figure 14 and 15 Since there are two cover plates 330, there are two sets of cover plate support assemblies 900, which are respectively installed on the front chamber and the rear chamber. The lower end of the support column 910 is fixedly installed on the base plate 350 or directly abuts against the base plate 350. The position of the support column 910 and the vertical rod 610 of the support structure 600 are in the same row.

[0071] Example 3

[0072] The difference between Example 3 and Example 1 is that the support structure 600 is different, while the rest of the structure and principle are basically the same.

[0073] Reference Figure 16 The support structure 600 includes three rows of support rods 601, which are arranged along the width of the material box 300. Each support rod 601 is rotatably mounted on the base plate 350 around its own central axis. The spacing between adjacent rows of support rods 601 is the same. The upper end of the middle row of support rods 601 is rotatably connected to the cover plate 330, while the upper ends of the other two rows of support rods 601 are rotatably connected to the crossbeam 312. The support structure 600 enhances the stability of the main frame 310.

[0074] Specifically, refer to Figure 17 The support rod 601 is equipped with support blocks 602, which are distributed in multiple rows along the circumference of the support rod 601. Each row of support blocks 602 is spaced apart along the vertical direction of the support rod 601. The height positions of adjacent rows of support blocks 602 are different. If it is necessary to change the height position of the same number of firing plates 800, all firing plates 800 are removed, and then the support rod 601 is rotated so that the support blocks 602 of different heights in other rows can be used to support the firing plates 800.

[0075] Furthermore, refer to Figure 18To prevent the support rods 601 from rotating freely when supporting the firing plate 800, a fixing rod 603 is connected between the support rods 601 in the same row. A slot 6031 is provided through the side wall of the fixing rod 603, and the fixing rod 603 and the support block 602 are inserted into it. To further strengthen the connection between the fixing rod 603 and the support block 602, a threaded hole is provided on the end face of the support block 602, and a screw 6021 is threaded onto the support block 602. The nut of the screw 6021 abuts against the fixing rod 603, thus fixing the support block 602 and the fixing rod 603 together. In this application, there are only two support rods 601 in a row. When the slot 6031 of the fixing rod 603 is inserted into the corresponding support block 602, the two support rods 601 mutually restrict each other, preventing the support rods 601 from rotating freely. At the same time, the fixing rod 603 also increases the contact area between the support rod 601 and the firing plate 800.

[0076] Furthermore, refer to Figure 19 The support rod 601 includes an outer rod 6011 and an inner rod 6012. The outer rod 6011 is rotatably mounted on the base plate 350, and the inner rod 6012 is rotatably mounted on the outer rod 6011. The rotation center of the inner rod 6012 is the same as that of the outer rod 6011. The upper end of the inner rod 6012 extends out of the outer rod 6011 and is rotatably connected to the crossbeam 312 or the cover plate 330. The support block 602 of the inner rod 6012 extends out of the outer rod 6011, and the outer rod 6011 has a relief groove 604 for the rotation of the support block 602 of the inner rod 6012.

[0077] Reference Figure 18 and Figure 19 Both the outer rod 6011 and the inner rod 6012 have two rows of support blocks 602. The two rows of support blocks 602 on the outer rod 6011 are symmetrically distributed, and the two rows of support blocks 602 on the inner rod 6012 are also symmetrically distributed. The support blocks 602 are interference-fitted into the inner rod 6012. The ends of the support blocks 602 on the outer rod 6011 are fixedly connected to screws 6022, which are threadedly connected to the outer rod 6011. The heights of adjacent support blocks 602 in the two rows of support blocks 602 on the outer rod 6011 are different, and the heights of adjacent support blocks 602 in the two rows of support blocks 602 on the inner rod 6012 are also different.

[0078] Specifically, the inner rod 6012 can rotate 90° within the outer rod 6011. The inner rod 6012 mainly rotates within the outer rod 6011 to form a first state and a second state. In the first state, the support block 602 of the inner rod 6012 and the support block 602 of the outer rod 6011 directly form a 90° angle, and four rows of support blocks 602 are formed on the support rod 601. It can be determined as needed which row of support blocks 602 is used to support the firing plate 800, thereby changing the distance between two adjacent firing plates 800. Whether the support block 602 of the inner rod 6012 or the support block 602 of the outer rod 6011 is used to support the firing plate 800, the distance between two adjacent support blocks 602 in the same row of support rods 601 is equal, and the fixing rod 603 can maintain a connection with the support blocks 602 in the same row of support rods 601.

[0079] In the second state, one row of support blocks 602 on the inner rod 6012 and one row of support blocks 602 on the outer rod 6011 overlap, forming two rows of support blocks 602 on the support rod 601. The support blocks 602 of the inner rod 6012 and the support blocks 602 of the outer rod 6011 are staggered. This can increase the number of layers of the firing plate 800 and also shorten the distance between adjacent firing plates 800.

[0080] Reference Figure 20 The fixed rods 603 of the adjacent two rows of support rods 601 are at the same height. Since the height of the support blocks 602 of the adjacent two columns of support rods 601 is not consistent, when the three rows of support rods 601 in the same chamber of the material box 300 support the firing plate 800, the firing plate 800 is stacked into two rows, and the height position of the two rows of firing plates 800 is different, which can also promote the uniformity of gas flow in the material box 300.

[0081] With the support structure 600 designed in Example 3, in practical applications, the inner rod 6012 and the outer rod 6011 can be rotated as needed to change the height position of the support plate 700 according to the different sizes and quantities of the workpieces, and the number of layers of the support plate 800 can also be increased or decreased.

[0082] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-zone degreasing and sintering integrated furnace, characterized in that: It includes a furnace body (100), a heating element installed in the furnace body (100), an insulation layer (200), and a material box (300). The material box (300) is located inside the insulation layer (200), and an exhaust device (400) is connected to the bottom of the material box (300). Furnace doors (110) are installed on both opposite ends of the furnace body (100), and each of the two furnace doors (110) is provided with an air inlet pipe (120). Air inlet pipes (120) are also provided at intervals around the furnace body (100), and baffle valves are installed on the air inlet pipes (120). An air guide box (500) is installed at the middle position of the length direction of the material box (300). The air guide box (500) divides the material box (300) into a front chamber and a rear chamber. Air holes (510) are evenly distributed on the side plates (320) of the air guide box (500) near the front chamber and the rear chamber. The bottom of the air guide box (500) is connected to the exhaust device (400).

2. The multi-zone degreasing and sintering integrated furnace according to claim 1, characterized in that: The exhaust device (400) includes an exhaust pipe (410) and a collector pipe (420). An exhaust hole (510) is provided at the bottom of the exhaust box (500). The exhaust pipe (410) and the exhaust hole (510) of the exhaust box (500) are connected, and the exhaust pipe (410) and the exhaust hole (510) correspond one-to-one. The collector pipe (420) guides the gas to be discharged outside the furnace body (100).

3. The multi-zone degreasing and sintering integrated furnace according to claim 1, characterized in that: The hopper (300) includes a main frame (310), a side plate (320), a cover plate (330), a door (340), and a bottom plate (350) installed on the main frame (310). The air guide box (500) is installed on the bottom plate (350). Air inlets (510) are distributed on the door (340) and the side plate (320).

4. The multi-zone degreasing and sintering integrated furnace according to claim 3, characterized in that: The side panel (320) includes an inner panel (321) and an outer panel (322), with ribs (323) installed between the inner panel (321) and the outer panel (322), and air inlets (510) distributed on the inner panel (321).

5. The multi-zone degreasing and sintering integrated furnace according to claim 3, characterized in that: The material box (300) is equipped with a support structure (600), which includes a row of vertical rods (610). A horizontal rod (620) connects two adjacent vertical rods (610). The vertical rods (610) close to the main frame (310) are used to support the main frame (310). The upper ends of the other vertical rods (610) abut against the cover plate (330), and the lower ends of the vertical rods (610) are connected to the support base (630).

6. The multi-zone degreasing and sintering integrated furnace according to claim 5, characterized in that: Both the vertical rod (610) and the main frame (310) are equipped with support plates (700) for supporting the firing plate (800), and the support plates (700) are distributed at intervals along the vertical direction.

7. The multi-zone degreasing and sintering integrated furnace according to claim 3, characterized in that: A support structure (600) is installed on the base plate (350). The support structure (600) includes three rows of support rods (601) arranged along the width direction of the material box (300). Support blocks (602) for supporting the firing plate (800) are installed on the support rods (601). The support blocks (602) are distributed in multiple rows along the circumference of the support rods (601). A row of support blocks (602) is spaced apart along the vertical direction of the support rods (601). The height positions of the support blocks (602) in adjacent rows are different.

8. The multi-zone degreasing and sintering integrated furnace according to claim 7, characterized in that: The support rod (601) includes an outer rod (6011) and an inner rod (6012). The outer rod (6011) is rotatably mounted on the base plate (350), and the inner rod (6012) is rotatably mounted on the outer rod (6011). The support blocks (602) of the outer rod (6011) and the inner rod (6012) are distributed in two rows. The outer rod (6011) has a relief groove (604) for the rotation of the support blocks (602) of the inner rod (6012). The support blocks (602) of the inner rod (6012) extend out of the outer rod (6011). The inner rod (6012) rotates to form a first state and a second state. In the first state, the support block (602) of the inner rod (6012) and the support block (602) of the outer rod (6011) form a 90° angle. In the second state, the support block (602) of the inner rod (6012) and the support block (602) of the outer rod (6011) are in the same column and are staggered.

9. A multi-zone degreasing and sintering integrated furnace according to claim 7, characterized in that: A fixing rod (603) is connected between the row of support rods (601). The fixing rod (603) has a slot (6031) and the fixing rod (603) and the support block (602) of the support rod (601) are inserted into each other.

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