A sintering device for ceramic resistor production

Abstract

The application belongs to the field of ceramic product sintering, and particularly relates to a sintering device for ceramic resistor production, which comprises a resistor furnace, the front end of the resistor furnace is provided with a lifting door capable of lifting, the front end of the resistor furnace is provided with a sintering bin, the inner wall of the sintering bin is provided with electric heating modules, the inner wall of the sintering bin is provided with detachable separation plates, the outer side of the separation plates is fixedly connected with heat transfer rods for placing sintering raw materials, and the front end of the resistor furnace is provided with a lifting frame capable of translating and steering; through the arrangement, full-automatic transportation and sintering work are realized, the sintering efficiency is improved, and different batches of materials can be subjected to targeted sintering work only by adjusting the temperature and time according to the materials entering the sintering bin each time; through the detachable arrangement of the separation plates, all the separation plates can be regularly removed for cleaning and replacement, thereby facilitating the in-furnace cleaning work of the resistor furnace.

Description

Technical Field

[0001] This invention belongs to the field of ceramic product sintering, specifically a sintering device for producing ceramic resistance. Background Technology

[0002] A ceramic resistor is a resistive element made of ceramic material. Ceramic is a material with good insulation properties and high resistivity, which allows ceramic resistors to effectively limit the flow of current in a circuit. It also has good chemical stability and is not easily corroded, making it a good material for making resistors.

[0003] Select a suitable ceramic powder, mix the ceramic powder with organic or inorganic binders and solvents evenly to form a slurry, then dry it, granulate it, dry press it into shape according to the product shape, and finally put the finished product into a sintering device for sintering to produce ceramic resistors.

[0004] Traditional ceramic sintering equipment generally uses box-type resistance furnaces or tunnel-type electric furnaces. Tunnel-type electric furnaces occupy too much space and have high costs, making them suitable for batch processing of similar products. Ceramic resistance furnaces are relatively small in size and come in various shapes, making them unsuitable for tunnel-type electric furnaces. Traditional box-type resistance furnaces often have a simple sintering chamber structure with only a simple electric heating structure inside. During use, materials can only be placed inside, and the internal sintering space cannot be changed according to needs. At the same time, the damage to the sintering chamber caused by long-term sintering is difficult to repair.

[0005] Therefore, the present invention provides a sintering apparatus for producing ceramic resistors. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A sintering device for ceramic resistance production according to the present invention includes a resistance furnace. The front end of the resistance furnace is equipped with a lifting door that can be raised and lowered. A sintering chamber is opened at the front end of the resistance furnace. An electric heating module is installed on the inner wall of the sintering chamber, and a detachable separation plate is installed on the inner wall of the sintering chamber. A heat transfer rod for placing sintering raw materials is fixed to the outer side of the separation plate. A lifting frame that can be translated and rotated is provided at the front end of the resistance furnace. The lifting frame includes multiple sets of horizontally arranged support rods. Each set of support rods is arranged vertically at equal intervals, and multiple support rods in each set are arranged horizontally at equal intervals. The lifting frame is used to transport and hold trays.

[0008] This setup enables fully automated transportation and sintering, improving sintering efficiency. By simply adjusting the temperature and time based on the material entering the sintering chamber each time, targeted sintering can be performed on different batches of material.

[0009] The separation plates in the sintering chamber can be removed from the side wall of the sintering chamber. Since the heat transfer rods are fixed to the separation plates, all heat transfer rods will be removed from the sintering chamber when the separation plates are removed. The arrangement of the heat transfer rods not only divides the sintering chamber into multiple layers, allowing for the neat arrangement of multiple trays and ceramic resistors, but also, because the heat transfer rods are fixed to the separation plates, and the separation plates are attached to the heating modules, the heat that was originally transferred from all sides can be distributed more quickly to multiple heat transfer rods, ensuring a constant temperature throughout the sintering chamber and improving sintering quality. Due to the long-term high-temperature operation in the sintering chamber, carbon deposits, slag, and other heat residues are prone to accumulate. If these impurities accumulate over time, they will affect the heat transfer efficiency and temperature uniformity within the furnace, and may even pose safety hazards. The detachable design of the separation plates allows for periodic removal, cleaning, and replacement of all separation plates, facilitating the cleaning of the resistance furnace. Furthermore, different separation plates can be fitted with different heat transfer rods, dividing the sintering chamber into areas of different sizes to suit different sintering needs, thus increasing the applicability of the equipment.

[0010] Preferably, the separation plate includes two end plates, two side plates, and one rear plate. The surface of the separation plate has mating holes adapted to the heating module. Two fixing valves are fixedly connected to the rear end face of the sintering chamber. Two insertion holes adapted to the fixing valves are opened on the rear plate. During operation, the two end plates, two side plates, and one rear plate are fixedly connected to the top, bottom, sides, and rear of the sintering chamber, respectively. The installation steps are as follows: first, the rear plate is placed vertically; then, the side plates on both sides are inserted and fixed; then, the bottom end plate is fixed; finally, the top end plate is fixed. The fixing valves are activated to push outward. The pushed-out fixing valves can not only fix the rear plate but also serve as a support to fix the top end plate. All separation plates are fixed by insertion, allowing the heating module to be vertically inserted into the mating hole to complete the insertion and fixing. Disassembly is performed by reversing the operation.

[0011] Preferably, a metal heat transfer plate is fixedly connected inside the separation plate, the heat transfer rod is made of ceramic, and a heat pipe is inside the heat transfer rod. The heat pipe is connected to the heat transfer plate. During operation, the metal heat transfer plate can conduct heat well, transferring the heat from the electric heating module to the heat pipe, ensuring that the heat transfer rod and the electric heating module heat up stably, thereby ensuring that the temperature inside the sintering chamber remains uniform.

[0012] Preferably, multiple heat transfer rods are evenly arranged in the sintering chamber to form multiple horizontal platform surfaces for placing trays. The multiple heat transfer rods are divided into five groups, and the five groups of heat transfer rods are fixed to two end plates, two side plates and one rear plate, respectively. During operation, the distribution of heat transfer rods can ensure that multiple heat transfer rods are uniformly heated by multiple heating modules, further ensuring the uniform temperature inside the sintering chamber. The heat transfer rods at the center position, which are farthest from the perimeter, are connected to the rear plate. Since there are fewer heat transfer rods at the center position, although the distance is greater, they can still be heated quickly. Different separation plates still adopt the same method. Although the distribution and number of heat transfer rods are different, they are still within the maximum limit to ensure that all heat transfer rods can be uniformly heated.

[0013] Preferably, the heat transfer rods fixed to the end plate and the side plate are grouped in pairs, and the two heat transfer rods in each group are connected to each other at the rear end and then fixed to the heat transfer plate. During operation, when the heat transfer rods need to divide into multiple layers, in order to ensure the heat transfer and distribution of the heat transfer rods, the heat transfer rods are grouped in pairs, fixed to each other, and then fixed to the heat transfer plate. This not only realizes the division of multiple layers of space, but also ensures the uniform heat distribution of each heat transfer rod.

[0014] Preferably, the bottom of the resistance furnace is fixedly connected to a base, the front end of the base is fixedly connected to an electric slide rail, the moving end of the electric slide rail is fixedly connected to a vertically arranged rotating arm, the output end of the rotating arm is fixedly connected to a lifting mechanism, and the lifting end of the lifting mechanism is fixedly connected to a support frame. During operation, the electric slide rail controls the horizontal movement of the rotating arm, and the rotating arm controls the rotation of the support frame. Rotating the support frame to one side facilitates the retrieval and placement of the tray. The lifting mechanism adjusts the overall lifting of the support frame. Through the cooperation of these three components, not only can the process of loading and unloading the tray be achieved... The placement and retrieval of the trays can be carried out simultaneously, and the separation plate can also be disassembled using the lifting frame. The specific steps are as follows: first, control the lifting frame to move into the sintering chamber and support the heat transfer rod fixed to the upper end plate. Control the lifting frame to tilt slightly by rotating the arm, so as to stably support the heat transfer rod. After contacting the fixed valve, the end plate detaches under the action of gravity and is supported by the lifting frame. Then, the bottom end plate and the side plates on both sides are removed in sequence, thus completing the disassembly of the separation plate. The installation work can also be carried out with the assistance of the lifting frame, and manual assistance is required when necessary.

[0015] Preferably, a feeding conveyor belt and a discharging conveyor belt are respectively provided on both sides of the resistance furnace. The feeding conveyor belt and the discharging conveyor belt have the same structure but opposite transport directions. The feeding conveyor belt is composed of multiple roller conveyor belts arranged from top to bottom. During operation, the feeding conveyor belt is used to transport the ceramic resistors to be sintered and the trays, and the discharging conveyor belt is used to transport the sintered ceramic resistors and the trays. The structure of the feeding conveyor belt and the discharging conveyor belt is designed to facilitate the lifting frame to smoothly transfer the trays above itself.

[0016] Preferably, a drive box is fixedly connected to both sides of the front end of the resistance furnace near the top. An electric gear is installed inside the drive box. A transmission rack that meshes with the electric gear is fixedly connected to both sides of the lifting door. During operation, the lifting door is controlled to lift by rotating the electric gear in the drive box and meshing with the transmission rack.

[0017] Preferably, the resistance furnace is equipped with a circulating fan, the surface of the end plate is provided with ventilation holes, and a vacuum pump connected to the sintering chamber is fixed to the outside of the lifting door. During operation, the circulating fan can be started to increase the cooling rate during the cooling stage; during the sintering stage, the vacuum pump can be turned on first to suck out the internal air and maintain the internal vacuum, while protective gas is added in through the circulating fan to ensure sintering safety and quality. The ventilation holes are used to transmit the airflow of the circulating fan.

[0018] Preferably, a heat transfer hood is fixedly connected to the outside of the resistance furnace above the feeding conveyor belt. A temperature control box is fixedly connected to the top of the heat transfer hood. A transmission pipe for transmitting airflow is fixedly connected between the top of the heat transfer hood and the resistance furnace. The bottom of the temperature control box is connected to the transmission pipe. During operation, the circulating fan is located at the bottom of the resistance furnace. The airflow from bottom to top passes through the ventilation holes and through the sintering chamber. The exhaust airflow carries high temperature and is transferred to the heat transfer hood through the transmission pipe. The heat transfer hood transfers the high-temperature gas to the ceramic resistor to be sintered during transportation for preheating, avoiding the adverse effects of rapid high temperature on the ceramic resistor. The temperature control box has another exhaust port. When the heat is too high, the heat is diverted to ensure constant temperature preheating of the ceramic resistor to be sintered.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The sintering apparatus for ceramic resistance production described in this invention achieves fully automatic transportation and sintering through the cooperation of a lifting frame and heat transfer rods capable of translation and steering, thereby improving sintering efficiency. Targeted sintering of different batches of materials can be performed simply by adjusting the temperature and time according to the material entering the sintering chamber each time. The detachable separation plate allows it to be removed from the side wall of the sintering chamber. Since the heat transfer rods are fixed to the separation plate, all heat transfer rods are removed from the sintering chamber when the separation plate is removed.

[0021] 2. The sintering apparatus for ceramic resistance production described in this invention, with its heat transfer rods, not only divides the sintering chamber into multiple layers, allowing for the neat arrangement of multiple trays and ceramic resistors, but also, because the heat transfer rods are fixedly connected to the separation plates, which in turn are attached to the heating modules, effectively distributes the heat that would otherwise be transferred from all sides more quickly to the multiple heat transfer rods. This ensures a constant temperature throughout the sintering chamber and improves sintering quality. Since the sintering chamber operates at high temperatures for extended periods, residual heat deposits such as carbon deposits and slag are prone to accumulate. If these impurities accumulate over time, they can affect the heat transfer efficiency and temperature uniformity within the furnace, and may even pose safety hazards. The detachable design of the separation plates allows for periodic removal, cleaning, and replacement, facilitating furnace cleaning. Furthermore, different heat transfer rods can be installed on different separation plates, dividing the sintering chamber into areas of varying sizes to suit different sintering needs, thus expanding the equipment's applicability. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a perspective view of the electric resistance furnace, the support frame, and the feeding conveyor belt of the present invention;

[0025] Figure 3 This is a perspective view of the electric resistance furnace of the present invention;

[0026] Figure 4 This is a perspective view of the electric resistance furnace and heat transfer rod of the present invention;

[0027] Figure 5 This is a perspective view of the separation plate of the present invention;

[0028] Figure 6 This is a perspective view of the separation plate and heat transfer rod of the present invention;

[0029] Figure 7 This is a perspective view of the heat transfer plate and the rear plate of the present invention;

[0030] Figure 8 This is a perspective view of the lifting frame of the present invention;

[0031] In the diagram: 1. Resistance furnace; 2. Heat transfer cover; 3. Transmission pipe; 4. Feeding conveyor belt; 5. Discharge conveyor belt; 6. Electric slide rail; 7. Rotating arm; 9. Lifting frame; 10. Loading tray; 11. Base; 12. Lifting door; 13. Vacuum pump; 14. Temperature control box; 15. Transmission rack; 16. Drive box; 17. Sintering chamber; 18. Electric heating module; 19. Heat transfer rod; 20. Separation plate; 21. End plate; 22. Rear plate; 23. Side plate; 24. Docking hole; 25. Fixed valve; 26. Heat transfer plate; 27. Lifting machine; 28. Support rod. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] like Figures 1 to 8 As shown in the embodiment of the present invention, a sintering apparatus for producing ceramic resistance includes a resistance furnace 1. The front end of the resistance furnace 1 is equipped with a lifting door 12 that can be raised and lowered. A sintering chamber 17 is opened at the front end of the resistance furnace 1. An electric heating module 18 is installed on the inner wall of the sintering chamber 17, and a detachable separation plate 20 is installed on the inner wall of the sintering chamber 17. A heat transfer rod 19 for placing sintering raw materials is fixed to the outer side of the separation plate 20. A lifting frame 9 that can be translated and rotated is provided at the front end of the resistance furnace 1. The lifting frame 9 includes multiple sets of horizontally arranged support rods 28. Each set of support rods 28 is arranged vertically at equal intervals, and multiple support rods 28 in each set are arranged horizontally at equal intervals. The lifting frame 9 is used to transport the holding tray 10.

[0034] The prepared ceramic resistors are placed in the holding tray 10. Ceramic resistors are generally made by mixing and grinding suitable ceramic powder and additives, then shaping the mixture using a molding machine; finally, sintering is performed. Each set of support rods 28 of the lifting frame 9 supports multiple holding trays 10, with the ceramic resistors neatly arranged on the trays 10 and spaced apart. The lifting frame 9 moves the multiple holding trays 10 containing the ceramic resistors into the sintering chamber 17. Multiple heat transfer rods 19 are also divided into multiple layers in the sintering chamber 17. At this time, each layer of the lifting frame 9 is slightly higher than each layer of heat transfer rods 19. After the lifting frame 9 is in place, the lifting frame 9 is controlled... As the material sinks, multiple support rods 28 pass through the gaps in the heat transfer rods 19 and move below them. The receiving tray 10 then rests on each layer of heat transfer rods 19. The lifting frame 9 then overflows the sintering chamber 17, the lifting door 12 closes the sintering chamber 17, and the heating module 18 steadily heats up. The material is then kept at a preset temperature for a predetermined time for constant-temperature sintering. After sintering, the temperature is slowly lowered, and finally the lifting door 12 is opened. The receiving tray 10 and ceramic resistor are then removed via the lifting frame 9, completing the sintering process. This setup achieves fully automated transport and sintering, improving sintering efficiency. It only requires adjusting the amount of material entering the sintering chamber 17 each time. By adjusting the temperature and time, targeted sintering of different batches of materials can be performed. The separation plate 20 in the sintering chamber 17 can be removed from the side wall of the sintering chamber 17. Since the heat transfer rods 19 are fixed to the separation plate 20, all heat transfer rods 19 will be removed from the sintering chamber 17 when the separation plate 20 is removed. The arrangement of the heat transfer rods 19 not only divides the sintering chamber 17 into multiple layers, allowing for the neat arrangement of multiple sets of trays 10 and ceramic resistors, but also, because the heat transfer rods 19 are fixed to the separation plate 20, and the separation plate 20 is attached to the heating module 18, the heat that was originally transferred from all sides can be more quickly distributed to the multiple heat transfer rods 19. This ensures a constant temperature within the sintering chamber 17, improving sintering quality. Since the sintering chamber 17 operates at high temperatures for extended periods, it is prone to accumulates heat residues such as carbon deposits and slag. Long-term accumulation of these impurities can affect heat transfer efficiency and temperature uniformity within the furnace, potentially even posing safety hazards. The detachable design of the separation plates 20 allows for periodic removal, cleaning, and replacement, facilitating cleaning of the resistance furnace 1. Furthermore, different separation plates 20 can be fitted with different heat transfer rods 19, dividing the sintering chamber 17 into areas of varying sizes to accommodate different sintering requirements, thus expanding the equipment's applicability.

[0035] The separation plate 20 includes two end plates 21, two side plates 23 and a rear plate 22. The surface of the separation plate 20 is provided with docking holes 24 that are compatible with the heating module 18. Two fixed valves 25 are fixedly connected to the rear end face of the sintering chamber 17. Two insertion holes compatible with the fixed valves 25 are provided on the rear plate 22.

[0036] During operation, two end plates 21, two side plates 23, and one rear plate 22 are fixed to the top, bottom, sides, and rear of the sintering chamber 17, respectively. The installation steps are as follows: first, place the rear plate 22 vertically; then, insert and fix the side plates 23 on both sides; then fix the bottom end plate 21; finally, fix the top end plate 21; and then activate the fixing valve 25 to push it outward. The pushed-out fixing valve 25 can not only fix the rear plate 22, but also serve as a support to fix the top end plate 21. All separation plates 20 are fixed by insertion, allowing the heating module 18 to be vertically inserted into the docking hole 24 to complete the insertion and fixing. Disassembly is performed by reversing the operation.

[0037] A metal heat transfer plate 26 is fixedly connected inside the separation plate 20. The heat transfer rod 19 is made of ceramic and has a heat pipe inside. The heat pipe is connected to the heat transfer plate 26.

[0038] During operation, the metal heat transfer plate 26 can conduct heat well, transferring the heat from the electric heating module 18 to the heat pipe, ensuring that the heat transfer rod 19 and the electric heating module 18 are heated stably, thereby ensuring that the internal temperature of the sintering chamber 17 remains uniform.

[0039] Multiple heat transfer rods 19 are arranged at equal intervals in the sintering chamber 17 to form multiple horizontal platform surfaces on which the holding trays 10 can be placed. The multiple heat transfer rods 19 are divided into five groups, and the five groups of heat transfer rods 19 are respectively fixed to two end plates 21, two side plates 23 and one rear plate 22.

[0040] During operation, the distribution of heat transfer rods 19 ensures that multiple heat transfer rods 19 are uniformly heated by multiple electric heating modules 18, further ensuring uniform temperature inside the sintering chamber 17. The heat transfer rods 19 at the center, which are furthest from the periphery, are connected to the rear plate 22. Since there are fewer heat transfer rods 19 at the center, they can be heated quickly despite the greater distance. Different separation plates 20 still use the same method. Although the distribution and number of heat transfer rods 19 are different, they are still within the maximum limit to ensure that all heat transfer rods 19 can be uniformly heated.

[0041] The heat transfer rods 19, which are fixed to the end plate 21 and the side plate 23 respectively, are in pairs and are fixed to the heat transfer plate 26 after being connected to each other at the rear end.

[0042] During operation, when the heat transfer rod 19 needs to divide into multiple layers of space, in order to ensure the heat transfer and distribution of the heat transfer rod 19, the heat transfer rod 19 is grouped in pairs, fixed to each other, and then fixed to the heat transfer plate 26. This not only realizes the division of multiple layers of space, but also ensures the uniform heat distribution of each heat transfer rod 19.

[0043] The bottom of the resistance furnace 1 is fixedly connected to a base 11, the front end of the base 11 is fixedly connected to an electric slide rail 6, the moving end of the electric slide rail 6 is fixedly connected to a vertically arranged rotating arm 7, the output end of the rotating arm 7 is fixedly connected to a lifting machine 27, and the lifting end of the lifting machine 27 is fixedly connected to a lifting frame 9.

[0044] During operation, the rotating arm 7 is controlled by the electric slide rail 6 to perform horizontal translation, and the rotating arm 7 controls the rotation of the lifting frame 9. The lifting frame 9 rotates to one side to facilitate the picking up and placing of the tray 10. The lifting mechanism 27 adjusts the overall lifting of the lifting frame 9. Through the cooperation of these three, not only can the tray 10 be placed and picked up, but the lifting frame 9 can also be used to disassemble the separation plate 20. The specific steps are as follows: first, control the lifting frame 9 to move into the sintering chamber 17 and support the heat transfer rod 19 fixed to the upper end plate 21. Control the lifting frame 9 to tilt slightly by the rotating arm 7, so as to stably support the heat transfer rod 19. After contacting the fixed valve 25, the end plate 21 is detached under the action of gravity and supported by the lifting frame 9. Then, the bottom end plate 21 and the side plates 23 on both sides are taken out in sequence, thereby completing the disassembly of the separation plate 20. The installation work can also be carried out with the assistance of the lifting frame 9. Manual assistance is required when necessary.

[0045] The resistance furnace 1 is provided with a feeding conveyor belt 4 and a discharging conveyor belt 5 on both sides respectively. The feeding conveyor belt 4 and the discharging conveyor belt 5 have the same structure but opposite transport directions. The feeding conveyor belt 4 is composed of multiple roller conveyor belts arranged from top to bottom.

[0046] During operation, the feeding conveyor belt 4 is used to transport the ceramic resistors to be sintered and the holding tray 10, and the discharging conveyor belt 5 is used to transport the sintered ceramic resistors and the holding tray 10. The structure of the feeding conveyor belt 4 and the discharging conveyor belt 5 is designed to facilitate the lifting frame 9 to smoothly transfer the holding tray 10 above itself.

[0047] The front end of the resistance furnace 1 is fixedly connected to both sides near the top of the drive box 16. The drive box 16 is equipped with an electric gear. Both sides of the lifting door 12 are fixedly connected to a transmission rack 15 that meshes with the electric gear. During operation, the electric gear in the drive box 16 rotates, and the transmission rack 15 meshes with the electric gear to control the lifting door 12 to lift.

[0048] The resistance furnace 1 is equipped with a circulating fan, the end plate 21 has ventilation holes on its surface, and the outside of the lifting door 12 is fixedly connected to a vacuum pump 13 that communicates with the sintering chamber 17.

[0049] During operation, the cooling stage can be accelerated by starting the circulating fan; during the sintering stage, the vacuum pump 13 can be turned on first to draw out the internal air and maintain the internal vacuum, while the circulating fan adds protective gas to ensure sintering safety and quality. The ventilation holes are used to transmit the airflow of the circulating fan.

[0050] A heat transfer cover 2 is fixedly connected to the outside of the resistance furnace 1 above the feeding conveyor belt 4. A temperature control box 14 is fixedly connected to the top of the heat transfer cover 2. A transmission pipe 3 for transmitting airflow is fixedly connected between the top of the heat transfer cover 2 and the resistance furnace 1. The bottom of the temperature control box 14 is connected to the transmission pipe 3.

[0051] During operation, the circulating fan is located at the bottom of the resistance furnace 1. The airflow from bottom to top passes through the ventilation hole and through the sintering chamber 17. The exhaust airflow carries high temperature and is transferred to the heat transfer hood 2 through the transmission pipe 3. The heat transfer hood 2 transfers the high temperature gas to the ceramic resistor to be sintered during transportation for preheating, avoiding the adverse effects of rapid high temperature on the ceramic resistor. The temperature control box 14 has another exhaust port. When the heat is too high, the heat is diverted to ensure constant temperature preheating of the ceramic resistor to be sintered.

[0052] During operation, the prepared ceramic resistors are placed in the holding trays 10. Ceramic resistors are generally made by mixing and grinding suitable ceramic powder and additives, then shaping the mixture using a molding machine; finally, sintering is performed. Each set of support rods 28 of the lifting frame 9 supports multiple holding trays 10, with the ceramic resistors neatly arranged on the trays 10 and spaced apart. The lifting frame 9 moves the multiple holding trays 10 containing the ceramic resistors into the sintering chamber 17. Multiple heat transfer rods 19 are also divided into multiple layers in the sintering chamber 17. At this time, each layer of the lifting frame 9 is slightly higher than each layer of heat transfer rod 19. After the lifting frame 9 is in place, the control mechanism... As the lifting frame 9 lowers, multiple support rods 28 pass through the gaps in the heat transfer rods 19 and move below them. The receiving trays 10 then rest on each layer of heat transfer rods 19. The lifting frame 9 then overflows the sintering chamber 17, the lifting door 12 closes the sintering chamber 17, and the heating module 18 steadily heats up. The temperature is maintained at a preset level for a predetermined time for constant-temperature sintering. After sintering, the temperature is slowly lowered. Finally, the lifting door 12 is opened, and the receiving trays 10 and ceramic resistors are removed via the lifting frame 9, completing the sintering process. This setup achieves fully automated transport and sintering, improving sintering efficiency. It only requires adjusting the amount of material entering the sintering chamber 17 each time. By adjusting the temperature and time of the materials, targeted sintering can be performed on different batches of materials. The separation plate 20 in the sintering chamber 17 can be removed from the side wall of the sintering chamber 17. Since the heat transfer rods 19 are fixed to the separation plate 20, all the heat transfer rods 19 will be removed from the sintering chamber 17 when the separation plate 20 is removed. The arrangement of the heat transfer rods 19 not only divides the sintering chamber 17 into multiple layers, allowing for the neat arrangement of multiple sets of trays 10 and ceramic resistors, but also, because the heat transfer rods 19 are fixed to the separation plate 20, and the separation plate 20 is attached to the heating module 18, the heat that was originally transferred from all sides can be distributed more quickly to the multiple heat transfer rods 19. The above ensures a constant temperature within the sintering chamber 17, improving sintering quality. However, due to the long-term high-temperature operation within the sintering chamber 17, residual heat deposits such as carbon buildup and slag are prone to occur. If these impurities accumulate over time, they can affect the heat transfer efficiency and temperature uniformity within the furnace, potentially even posing safety hazards. The detachable design of the separation plates 20 allows for periodic removal, cleaning, and replacement, facilitating the cleaning of the resistance furnace 1. Furthermore, different separation plates 20 can be fitted with different heat transfer rods 19, dividing the sintering chamber 17 into areas of varying sizes to accommodate different sintering requirements, thus expanding the equipment's applicability.

[0053] Two end plates 21, two side plates 23, and one rear plate 22 are respectively fixed to the top, bottom, sides, and rear of the sintering chamber 17. The installation steps are as follows: first, place the rear plate 22 vertically, then insert and fix the side plates 23 on both sides, then fix the bottom end plate 21, and finally fix the top end plate 21. Activate the fixing valve 25 to push it outward. The pushed-out fixing valve 25 can not only fix the rear plate 22, but also serve as a support to fix the top end plate 21. All separation plates 20 are fixed by insertion, allowing the heating module 18 to be vertically inserted into the docking hole 24 to complete the insertion and fixing. Disassembly is done by reversing the operation.

[0054] The metal heat transfer plate 26 can conduct heat well, transferring the heat from the electric heating module 18 to the heat pipe, ensuring that the heat transfer rod 19 and the electric heating module 18 are heated stably, thereby ensuring that the internal temperature of the sintering chamber 17 remains uniform.

[0055] The distribution of heat transfer rods 19 ensures that multiple heat transfer rods 19 are uniformly heated by multiple electric heating modules 18, further ensuring uniform temperature inside the sintering chamber 17. The heat transfer rods 19 at the center, which are furthest from the periphery, are connected to the rear plate 22. Since there are fewer heat transfer rods 19 at the center, they can be heated quickly despite the greater distance. Different separation plates 20 still use the same method. Although the distribution and number of heat transfer rods 19 are different, they are still within the maximum limit to ensure that all heat transfer rods 19 can be uniformly heated.

[0056] When the heat transfer rod 19 needs to be divided into multiple layers, in order to ensure the heat transfer and distribution of the heat transfer rod 19, the heat transfer rod 19 is grouped in pairs, fixed to each other, and then fixed to the heat transfer plate 26. This not only realizes the division of multiple layers of space, but also ensures the uniform heat distribution of each heat transfer rod 19.

[0057] The electric slide rail 6 controls the horizontal translation of the rotating arm 7, and the rotating arm 7 controls the rotation of the lifting frame 9. The lifting frame 9 rotates to one side to facilitate the picking up and placing of the tray 10. The lifting mechanism 27 adjusts the overall lifting of the lifting frame 9. Through the cooperation of these three, not only can the tray 10 be placed and picked up, but the lifting frame 9 can also be used to disassemble the separation plate 20. The specific steps are as follows: first, control the lifting frame 9 to move into the sintering chamber 17 and support the heat transfer rod 19 fixed to the upper end plate 21. Control the lifting frame 9 to tilt slightly through the rotating arm 7, so as to stably support the heat transfer rod 19. After contacting the fixed valve 25, the end plate 21 is detached under the action of gravity and supported by the lifting frame 9. Then, the bottom end plate 21 and the side plates 23 on both sides are taken out in sequence, thereby completing the disassembly of the separation plate 20. The installation work can also be carried out with the assistance of the lifting frame 9. Manual assistance is required when necessary.

[0058] The feeding conveyor belt 4 is used to transport the ceramic resistors to be sintered and the holding tray 10, and the discharging conveyor belt 5 is used to transport the sintered ceramic resistors and the holding tray 10. The structure of the feeding conveyor belt 4 and the discharging conveyor belt 5 is designed to facilitate the lifting frame 9 to smoothly transfer the holding tray 10 above itself.

[0059] The electric gear in the drive box 16 rotates, and the transmission rack 15 meshes with the electric gear to control the lifting door 12 to lift.

[0060] During the cooling stage, starting the circulating fan can increase the cooling rate; during the sintering stage, the vacuum pump 13 can be turned on first to draw out the internal air and maintain the internal vacuum, while the circulating fan adds protective gas to ensure sintering safety and quality. The ventilation holes are used to transmit the airflow of the circulating fan.

[0061] The circulating fan is located at the bottom of the resistance furnace 1. The airflow from bottom to top passes through the ventilation hole and passes through the sintering chamber 17. The exhaust airflow carries high temperature and is transferred to the heat transfer hood 2 through the transmission pipe 3. The heat transfer hood 2 transfers the high temperature gas to the ceramic resistor to be sintered during transportation for preheating, avoiding the adverse effects of rapid high temperature on the ceramic resistor. The temperature control box 14 has another exhaust port. When the heat is too high, the heat is diverted to ensure constant temperature preheating of the ceramic resistor to be sintered.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sintering apparatus for the production of ceramic resistors, characterized in that: The utility model provides an electric resistance furnace, the front end of the electric resistance furnace is equipped with a lifting door capable of lifting, the front end of the electric resistance furnace is provided with a sintering bin, the inner wall of the sintering bin is equipped with an electric heating module, and the inner wall of the sintering bin is equipped with a detachable separation plate, the outer side of the separation plate is fixedly connected with a heat transfer rod for placing sintering raw materials, the front end of the electric resistance furnace is provided with a lifting frame capable of translating and steering, the lifting frame comprises a plurality of groups of horizontally arranged support rods, each group of support rods is vertically and equidistantly arranged, and a plurality of support rods in each group are horizontally and equidistantly arranged, and the lifting frame is used for conveying a containing disc. The separation plate comprises two end plates, two side plates and a rear plate, the surface of the separation plate is provided with a butt joint hole matched with the electric heating module, the rear end surface of the sintering bin is fixedly connected with two fixed valves, and the rear plate is provided with two insertion holes matched with the fixed valves. The inside of the separation plate is fixedly connected with a heat transfer plate made of metal, the heat transfer rod is made of ceramic, and the heat transfer rod has a heat pipe in the inside. A plurality of heat transfer rods are equidistantly arranged in the sintering bin to form a plurality of water platform surfaces capable of placing the containing disc, and the plurality of heat transfer rods are divided into five groups, and the five groups of heat transfer rods are fixedly connected with the two end plates, the two side plates and the rear plate respectively. The heat transfer rods fixedly connected with the end plates and the side plates are arranged in pairs, and each pair of heat transfer rods is fixedly connected with the heat transfer plate after being connected with each other at the rear end.

2. The sintering device for the production of ceramic resistors according to claim 1, characterized in that: The bottom of the electric resistance furnace is fixedly connected with a base, the front end of the base is fixedly connected with an electric sliding rail, the moving end of the electric sliding rail is fixedly connected with a vertically arranged rotating arm, the output end of the rotating arm is fixedly connected with an elevator, and the lifting end of the elevator is fixedly connected with the lifting frame.

3. The sintering device for the production of ceramic resistors according to claim 2, characterized in that: The two sides of the electric resistance furnace are respectively provided with a feeding conveyor belt and a discharging conveyor belt, the feeding conveyor belt and the discharging conveyor belt are the same in structure and opposite in conveying direction, and the feeding conveyor belt is composed of a plurality of upper and lower roller conveyor belts.

4. The sintering device for the production of ceramic resistors according to claim 3, characterized in that: The front end of the electric resistance furnace is fixedly connected with a drive box on both sides of the top, the inside of the drive box is provided with an electric gear, and the two sides of the lifting door are fixedly connected with a transmission rack engaged with the electric gear.

5. The sintering device for the production of ceramic resistors according to claim 4, characterized in that: The inside of the electric resistance furnace is provided with a circulating fan, the surface of the end plate is provided with a ventilation hole, and the outer side of the lifting door is fixedly connected with a vacuum pump communicated with the sintering bin.

6. The sintering device for the production of ceramic resistors according to claim 5, characterized in that: The top of the heat transfer cover is fixedly connected with a temperature control box, the bottom of the temperature control box is communicated with the transmission pipe, and the top of the heat transfer cover is fixedly connected with a transmission pipe for transmitting airflow between the electric resistance furnace and the temperature control box.

Images