Sintering oven furnace for sintering polytetrafluoroethylene and sintering method of sintering oven furnace

Abstract

The invention relates to the technical field of sintering furnaces, and provides a sintering oven furnace for sintering polytetrafluoroethylene and a sintering method of the sintering oven furnace. Air blowers are installed on the two sides of the furnace body, a connecting pipe is installed on the top of the furnace body, a sliding rail is movably installed in the furnace body, and a frame is fixed to the top end of the sliding rail. Through the arrangement of the main disc and the base fixed to the top of the main shaft, when the main shaft rotates, the main screw and the main disc on the main screw rotate at the same time, the main disc rotates at the top of the frame to drive the secondary disc to pass through teeth on the secondary screw and a lower chuck of the secondary disc to rotate, and the secondary disc rotates by 60 degrees every time the main disc rotates by one circle; the polytetrafluoroethylene product close to the center position is rotated to the outer side, so that the product above is in full and uniform contact with hot air, the effect of uniform heating of the sintering oven is achieved, the sintering quality and uniformity of the product are guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sintering furnaces, in particular to a sintering oven furnace for sintering polytetrafluoroethylene and a sintering method thereof. Background Art

[0002] The sintering oven furnace for tetrafluoroethylene sintering is a device specially designed for sintering and curing PTFE, Teflon and other products. The sintering oven furnace usually has a sintering temperature of up to 500°C, which can meet the sintering and curing requirements of high polymer materials such as polytetrafluoroethylene. It adopts a PID microcomputer control system and has functions such as fully automatic constant temperature and rapid temperature compensation to ensure temperature stability and uniformity during the sintering process. The sintering of polytetrafluoroethylene is a phase change process. It is necessary to heat the preform to above the melting point of the resin (327°C) and keep it at this temperature for a period of time so that the single-particle resin can expand each other and finally bond and fuse into a dense whole.

[0003] The above-mentioned prior art solutions have the following defects: when the sintering furnace is in use, the turntable needs to be rotated so that the products above are heated evenly, but the products at the center of the turntable are still in a relatively static state during the rotation, and are always in the center inner circle of the disk, which may cause differences in sintering temperature, time and other conditions between the products at this part and the products at other positions, thereby affecting the sintering quality and uniformity of the products;

[0004] The inner wall of the sintering furnace is usually only provided with high thermal resistance materials, and the thermal insulation performance is insufficient, which causes the temperature inside the sintering oven to fluctuate, making it impossible for the PTFE material to maintain a stable temperature environment during the sintering process. In addition, the hot air generated by the sintering oven during the heating process is directly discharged, and the heat is not effectively recovered and utilized, increasing energy consumption. Summary of the invention

[0005] The object of the present invention is to provide a sintering oven furnace for sintering polytetrafluoroethylene and a sintering method thereof, so as to solve the defects of uneven heating and insufficient heat cycle utilization of the existing sintering oven furnace for sintering polytetrafluoroethylene and a sintering method thereof.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a sintering oven furnace for sintering polytetrafluoroethylene and a sintering method thereof, comprising a furnace body and a frame movably installed inside; blowers are installed on both sides of the furnace body, a connecting pipe is installed on the top of the furnace body, a slide rail is movably installed inside the furnace body, and a frame is fixed on the top of the slide rail, a main disc is movably installed inside the frame, a connecting plate is movably connected to one end of the frame, and a rotating mechanism is movably installed at the bottom of the furnace body; secondary screws are movably installed at the corners of the frame, and a main screw is arranged at the center of the secondary screw, and nuts are threadedly installed on the outside of the secondary screw and the main screw; secondary discs are rotatably installed at the corners of the main disc, and a chuck is fixed at the bottom of the secondary disc, and teeth are movably installed on the outside of the secondary screw on one side of the chuck.

[0007] Preferably, the inner wall of the furnace body is provided with an inner cavity, and U-shaped heating tubes are installed at equal intervals inside the inner cavity, an insulation cavity is provided outside the inner cavity, an outer cavity is provided outside the insulation cavity, and a door body is movably installed at one end of the furnace body.

[0008] Preferably, a fixing rod is movably installed on one side of the door body, and a fixing shaft is welded to the top and bottom ends of the fixing rod, and a fixing buckle is fixedly installed on one end of the furnace body outside the fixing shaft.

[0009] Preferably, a conduit is fixedly connected to the top of the furnace body in the middle of the connecting pipe, and the bottom of the conduit is pressed against the exhaust fan, one end of the connecting pipe away from the conduit extends to the inside of the outer cavity, and a copper tube is connected to the outside of the outer cavity at the bottom of the connecting pipe.

[0010] Preferably, the output end of the blower is connected to a ventilation pipe, and one end of the ventilation pipe away from the blower extends to the inside of the inner cavity, the copper tube is wound around the outside of the ventilation pipe, the secondary screw passes through the corner of the frame, the main screw passes through the middle position of the main disc, and the teeth and the chuck are meshingly connected.

[0011] Preferably, the rotating mechanism includes a servo motor, a right-angle gear set, a main shaft, a base, a support and a block; the main shaft is rotatably installed at the bottom of the furnace body, the bottom end of the main shaft is fixedly installed with a right-angle gear set, and a servo motor is installed on the side of the right-angle gear set away from the main shaft, the top of the main shaft is fixedly installed with a base, and the bottom end of the main screw at the top of the base is fixedly installed with a support, and blocks are fixedly installed on both sides of the bottom end of the support.

[0012] Preferably, both sides of the top of the base are provided with card slots, and protrusions are movably provided inside the card slots, and springs are fixedly installed at the bottom ends of the protrusions.

[0013] Preferably, a U-shaped groove is fixedly installed on the top and bottom of the door body at one end of the connecting plate, and the U-shaped groove and the connecting plate are hingedly connected. A movable shaft is welded at one end of the connecting plate, and a movable groove is provided at one end of the frame outside the movable shaft, and a sliding structure is formed between the movable shaft and the movable groove.

[0014] Preferably, slide grooves are provided on both sides of the slide rail, slide bars are fixed on both sides of the bottom end of the frame inside the slide rail, and rollers are rotatably installed on both sides of the slide bar, a sliding structure is formed between the slide bar and the slide rail, and a sliding structure is formed between the roller and the slide groove.

[0015] A sintering method of a sintering oven furnace for sintering polytetrafluoroethylene comprises the following steps:

[0016] S1. First, rotate the fixed rod to drive the fixed shafts at both ends to flip to one side, and then directly pull the door open after moving away from the fixed buckle. In the process of pulling the door, the frame and the door are connected by a connecting plate, which drives the movable shaft to pull the movable groove, so that the entire frame and the main disc generate outward force. The block at the bottom of the main screw has the same inclination angle as the protrusion, and slides outward along the slot under the action of the pulling force. The protrusion is squeezed and displaced downward, and the block continues to move outward. The slide bar at the bottom of the frame slides outward along the slide rail, so that the frame and the main disc slide out of the furnace body;

[0017] S2. The frame and the secondary screw, the main disc and the main screw are fixed by nuts. The frame and the main disc are provided with several groups. The staff can adjust the interval between the frame or the main disc according to the size of the polytetrafluoroethylene product. Nuts are installed at the top and bottom of the connection between the frame and the secondary screw. After the nuts are rotated to the appropriate position, the nuts at both ends rotate relative to each other to squeeze and fix the frame. Similarly, the nuts at both ends of the main disc are rotated to fix its position on the main screw. The main disc is set at the top of the frame. After adjusting the spacing, the polytetrafluoroethylene product to be sintered is placed on the top of the main disc and the secondary disc. After the polytetrafluoroethylene product is placed, the door body is closed and the frame is pushed back to its position through the connecting plate. When the block at its bottom slides to the bottom of the slot, the protrusion pops up and resets under the action of the spring tension to prevent the block from sliding out without external force. The frame drives the polytetrafluoroethylene product into the interior of the furnace body, and the door body is closed;

[0018] S3. Start the U-shaped heating tube inside the inner cavity and the blowers on both sides, so that there is hot air continuously in the furnace body. The inner wall of the furnace body is installed with a temperature sensor to control the internal temperature and time to ensure that the material is fully sintered. Start the servo motor to drive the right-angle gear set to rotate, so that the main shaft and the base connected thereto rotate at the same time, and the block clamped on the top of the base is fixed to the main screw, so that the main disc on the main screw rotates at the same time. The servo motor rotates slowly, so that the polytetrafluoroethylene products on the top of the main disc and the secondary disc are evenly in contact with the hot air inside the furnace body. At the same time, when the main disc rotates, it drives the secondary disc to pass through the teeth on one side of the secondary screw, and the teeth mesh with the chuck. When the chuck contacts the teeth, the chuck rotates. Due to its raised setting, each time the main disc rotates one circle, the secondary disc rotates 60°, so that the polytetrafluoroethylene product close to the center position can be rotated to the outside, so that the contact with the hot air is more sufficient and uniform;

[0019] S4. The exhaust fan draws the hot air inside the furnace body into the duct, and then transports it to the outer cavity through the connecting pipes on both sides. An insulation cavity is set in the middle of the inner wall of the furnace body. The insulation cavity is made of a material with high thermal resistance to reduce the conduction loss of heat through the furnace wall. After the hot air enters the outer cavity, convection heat transfer can be formed, which helps to maintain the uniformity of temperature inside the furnace body and reduce temperature fluctuations. The hot air in the outer cavity is discharged to the outside of the furnace body through the copper pipe, and the copper pipe is wound and arranged on the outside of the ventilation duct. The copper pipe is a metal with good thermal conductivity. The heat of the hot air passing through the copper pipe will be quickly transferred to the copper pipe wall, causing the copper pipe to heat up as a whole, which has a preheating effect on the cold air in the ventilation duct, thereby enhancing the thermal circulation effect.

[0020] Compared with the prior art, the invention has the following beneficial effects: the sintering oven furnace for sintering polytetrafluoroethylene can rotate the product on the inner circle of the center of the turntable to the outer circle when the turntable rotates during the sintering process, so that the product can be kept consistent in terms of temperature, time and other conditions, thereby ensuring the sintering quality; and the heat generated by the sintering oven furnace during the heating process is conducted out to insulate the furnace body and enhance the insulation effect, and at the same time the air inlet pipe is preheated to fully utilize the heat;

[0021] 1. A main disc and a base fixed on the top of the main shaft are provided, and the clamping block is engaged and limited between the clamping block in the clamping groove and the protrusion, so that when the main shaft rotates, the main screw rotates synchronously, and the main disc on it rotates at the same time. The main disc rotates on the top of the frame, driving the secondary disc above it to pass through the teeth fixed on the secondary screw on one side, and the teeth mesh with the chuck, and the chuck rotates. Due to the convex setting, each time the main disc rotates one circle, the secondary disc rotates 60°, and the polytetrafluoroethylene product near the center position can be rotated to the outside, so that the upper product is more fully and evenly contacted with the hot air, thereby achieving the effect of uniform heating of the sintering oven furnace, ensuring the sintering quality and uniformity of the product, and improving production efficiency;

[0022] 2. By providing an outer cavity, the exhaust fan installed on the top of the furnace body transports the hot air in the furnace to the inside of the outer cavity through the connecting pipes on both sides, which can form convection heat transfer, help maintain the uniformity of the temperature in the furnace body, and reduce temperature fluctuations. The hot air in the outer cavity is discharged through the copper tube. The copper tube is a metal with good thermal conductivity. The heat of the hot air passing through the copper tube will be quickly transferred to the copper tube wall, making the copper tube as a whole hot. The copper tube is wrapped around the outside of the ventilation pipe. The heat of the copper tube adheres to the surface of the ventilation pipe, which preheats the cold air pumped by the blower through the ventilation pipe, thereby strengthening the thermal circulation of the sintering oven furnace, which not only improves the insulation effect and ensures the stability of the temperature in the furnace, but also effectively recovers and utilizes the heat to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the door body of the present invention when it is in an open state;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the door body of the present invention when it is in an open state when viewed from above;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the furnace body of the present invention in a half-section state;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the heat preservation chamber of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the framework of the present invention from a top view;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the framework of the present invention when viewed from above;

[0030] Figure 8 It is a top view three-dimensional structural schematic diagram of the main disc of the present invention in a disassembled state;

[0031] Fig. 9 This is a schematic diagram of the three-dimensional structure of the main disc of the present invention when it is disassembled and viewed from above;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the base of the present invention in a cut-away state;

[0033] Fig.11 This is a schematic diagram of the three-dimensional structure of the support of the present invention when viewed from above;

[0034] Fig.12 For the present invention Figure 1 A partial enlarged schematic diagram of the three-dimensional structure.

[0035] Explanation of reference numerals in the figure: 1. furnace body; 11. door body; 111. fixing rod; 112. fixing shaft; 113. fixing buckle; 12. inner cavity; 13. heat preservation cavity; 14. outer cavity; 2. connecting pipe; 21. conduit; 22. exhaust fan; 23. copper pipe; 3. blower; 31. ventilation pipe; 4. frame; 41. secondary screw; 42. main screw; 43. nut; 5. rotating mechanism; 5 1. Servo motor; 52. Right-angle gear set; 53. Main shaft; 54. Base; 541. Slot; 542. Bump; 543. Spring; 55. Support; 56. Block; 6. Connecting plate; 61. U-shaped slot; 62. Movable shaft; 63. Movable slot; 7. Slide rail; 71. Slide slot; 72. Slide bar; 73. Roller; 8. Main disc; 81. Secondary disc; 82. Teeth; 83. Chuck. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 12 The present invention provides a sintering oven furnace for sintering polytetrafluoroethylene and a sintering method thereof, comprising a furnace body 1 and a frame 4 movably installed inside; blowers 3 are installed on both sides of the furnace body 1, and the output ends of the blowers 3 are connected to ventilation pipes 31, and the ventilation pipes 31 extend to the inside of an inner cavity 12 at one end away from the blower 3, and a secondary screw 41 passes through the corner of the frame 4, and an inner cavity 12 is provided on the inner wall of the furnace body 1, and U-shaped heating tubes are installed at equal intervals inside the inner cavity 12, and an insulation cavity 13 is provided outside the inner cavity 12, and the insulation cavity 13 contains a material with high thermal resistance to reduce the conduction loss of heat through the furnace wall, and an outer cavity 14 is provided outside the insulation cavity 13, and a door body 11 is movably installed at one end of the furnace body 1, and a fixing rod 111 is movably installed on one side of the door body 11, and The top and bottom ends of the fixing rod 111 are welded with a fixing shaft 112, and one end of the furnace body 1 outside the fixing shaft 112 is fixedly installed with a fixing buckle 113; a connecting pipe 2 is installed on the top of the furnace body 1, and a guide tube 21 is fixedly connected to the top of the furnace body 1 in the middle of the connecting pipe 2, and the bottom of the guide tube 21 presses the exhaust fan 22, and the end of the connecting pipe 2 away from the guide tube 21 extends to the inside of the outer cavity 14, and the hot air enters the outer cavity 14, thereby enhancing the heat preservation effect and ensuring the stability of the temperature in the furnace body 1, and the outer side of the outer cavity 14 at the bottom of the connecting pipe 2 is connected to a copper tube 23, and the copper tube 23 is wound around the outside of the ventilation pipe 31. When the hot air is discharged from the copper tube 23, the copper tube 23 will be quickly conducted to the wall of the copper tube 23, so that the copper tube 23 is heated as a whole, which has a preheating effect on the wind in the ventilation pipe 31;

[0038] One end of the frame 4 is movably connected with a connecting plate 6, and the top and bottom of the door body 11 at one end of the connecting plate 6 are fixedly installed with a U-shaped groove 61, and the U-shaped groove 61 and the connecting plate 6 are hingedly connected, and one end of the connecting plate 6 is welded with a movable shaft 62, and one end of the frame 4 outside the movable shaft 62 is provided with a movable groove 63, and a sliding structure is formed between the movable shaft 62 and the movable groove 63, so that when the door body 11 is opened, the frame 4 is pulled by the connecting plate 6, so that it is convenient to take and place polytetrafluoroethylene products. A slide rail 7 is movably installed inside the furnace body 1, and slide grooves 71 are arranged on both sides of the slide rail 7. Slide bars 72 are fixed on both sides of the bottom of the frame 4 inside the slide rail 7, and rollers 73 are rotatably installed on both sides of the slide bar 72. A sliding structure is formed between the slide bar 72 and the slide rail 7, and a sliding structure is formed between the roller 73 and the slide groove 71. The setting of the roller 73 makes the frame 4 move more smoothly; the frame 4 is fixed on the top of the slide rail 7, and the main disc 8 is movably installed inside the frame 4.

[0039] A rotating mechanism 5 is movably installed at the bottom of the furnace body 1; the rotating mechanism 5 includes a servo motor 51, a right-angle gear set 52, a main shaft 53, a base 54, a support 55 and a clamping block 56; the main shaft 53 is rotatably installed at the bottom of the furnace body 1, the right-angle gear set 52 is fixedly installed at the bottom end of the main shaft 53, and the servo motor 51 is installed on the side of the right-angle gear set 52 away from the main shaft 53, the right-angle gear set 52 plays the effect of connecting the main shaft 53 and the servo motor 51, and the top of the main shaft 53 A base 54 is fixedly installed, and a support 55 is fixedly installed at the bottom end of the main screw 42 at the top of the base 54, and blocks 56 are fixedly installed on both sides of the bottom end of the support 55, and slots 541 are provided on both sides of the top of the base 54, and bumps 542 are movably provided inside the slots 541, and springs 543 are fixedly installed at the bottom ends of the bumps 542. The springs 543 can be contracted when the block 56 squeezes the bump 542, so as to facilitate the sliding out of the block 56. When the block 56 enters the bottom end of the slot 541, the spring 543 pushes the protrusion 542 upward, so that the block 56 is engaged and fixed with the base 54; the corners of the frame 4 are movably equipped with secondary screws 41, and the center of the secondary screws 41 is provided with a main screw 42, and the outer parts of the secondary screws 41 and the main screws 42 are threadedly installed with nuts 43, and the spacing between the frame 4 and the main disc 8 can be adjusted by rotating the nuts 43, so that it can be applied to polytetrafluoroethylene terephthalate 54 of different sizes. Fluorinated vinyl products; secondary discs 81 are rotatably mounted at the corners of the main disc 8, and a chuck 83 is fixed at the bottom of the secondary disc 81. A tooth 82 is movably mounted on the outside of the secondary screw 41 on one side of the chuck 83. The main screw 42 passes through the middle of the main disc 8. The tooth 82 and the chuck 83 are meshed and connected. When the main disc 8 rotates one circle, the secondary disc 81 rotates 60°, driving the polytetrafluoroethylene product at the center position above to rotate to the outer circle, so that the heating is more uniform;

[0040] A sintering method of a sintering oven furnace for sintering polytetrafluoroethylene comprises the following steps:

[0041] S1. First, the fixed rod 111 is rotated to drive the fixed shafts 112 at both ends to flip to one side, away from the fixed buckle 113, and then the door body 11 is directly pulled open. In the process of pulling the door body 11, because the frame 4 and the door body 11 are connected by the connecting plate 6, the movable shaft 62 is driven to pull the movable groove 63, so that the entire frame 4 and the main disc 8 generate outward power. The block 56 at the bottom of the main screw 42 has the same inclination angle as the protrusion 542, and slides outward along the slot 541 under the action of the pulling force. The protrusion 542 is squeezed and displaced downward, and the block 56 continues to move outward. The slide bar 72 at the bottom of the frame 4 slides outward along the slide rail 7, so that the frame 4 and the main disc 8 slide out of the furnace body 1.

[0042] S2. The frame 4 and the secondary screw 41, the main disc 8 and the main screw 42 are fixed by nuts 43. The frame 4 and the main disc 8 are provided with several groups. The staff can adjust the interval between the frame 4 or the main disc 8 according to the size of the polytetrafluoroethylene product. The top and bottom of the connection between the frame 4 and the secondary screw 41 are installed with nuts 43. After rotating the nuts 43 to the appropriate position, the nuts 43 at both ends rotate relative to each other to squeeze and fix the frame 4. Similarly, the nuts 43 at both ends of the main disc 8 are rotated to fix it on the main screw 42. Position, the main disc 8 is set on the top of the frame 4. After adjusting the spacing, the polytetrafluoroethylene product to be sintered is placed on the top of the main disc 8 and the secondary disc 81. After the polytetrafluoroethylene product is placed, the door body 11 is closed and the frame 4 is pushed back to its position through the connecting plate 6. When the block 56 at its bottom slides to the bottom of the slot 541, the protrusion 542 pops up and resets under the tension of the spring 543 to prevent the block 56 from sliding out without external force. The frame 4 drives the polytetrafluoroethylene product into the interior of the furnace body 1, and the door body 11 is closed;

[0043] S3. Start the U-shaped heating tube inside the inner cavity 12 and the blowers 3 on both sides, so that hot air is continuously supplied to the furnace body 1. A temperature sensor is installed on the inner wall of the furnace body 1 to control the internal temperature and time to ensure that the material is fully sintered. Start the servo motor 51 to drive the right-angle gear set 52 to rotate, so that the main shaft 53 and the base 54 connected thereto rotate at the same time, and the block 56 on the top of the base 54 is fixed to the main screw 42, so that the main disc 8 on the main screw 42 rotates at the same time. The servo motor 51 rotates slowly, so that the main disc 8 on the main screw 42 rotates at the same time. The polytetrafluoroethylene products on the top of the disk 8 and the secondary disk 81 are evenly contacted with the hot air inside the furnace body 1. At the same time, when the main disk 8 rotates, it drives the secondary disk 81 to pass through the teeth 82 on the secondary screw 41 on one side. The teeth 82 mesh with the chuck 83. When the chuck 83 contacts the teeth 82, the chuck 83 rotates. Due to the convex setting, each time the main disk 8 rotates one circle, the secondary disk 81 rotates 60°, so that the polytetrafluoroethylene products near the center position can be rotated to the outside, so that the contact with the hot air is more sufficient and uniform.

[0044] S4. The exhaust fan 22 draws the hot air inside the furnace body 1 into the duct 21, and then transports it to the outside of the outer cavity 14 through the connecting pipes 2 on both sides. An insulation cavity 13 is arranged in the middle position of the inner wall of the furnace body 1. The insulation cavity 13 is made of a material with high thermal resistance to reduce the conduction loss of heat through the furnace wall. After the hot air enters the outside of the outer cavity 14, convection heat transfer can be formed, which helps to maintain the uniformity of the temperature inside the furnace body 1 and reduce temperature fluctuations. The hot air in the outer cavity 14 is discharged to the outside of the furnace body 1 through the copper tube 23, and the copper tube 23 is wound and arranged on the outside of the ventilation pipe 31. The copper tube 23 is a metal with good thermal conductivity. The heat of the hot air passing through the copper tube 23 will be quickly conducted to the wall of the copper tube 23, so that the copper tube 23 is heated as a whole, which has a preheating effect on the cold air in the ventilation pipe 31, thereby enhancing the heat circulation effect.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sintering oven furnace for sintering polytetrafluoroethylene, comprising a furnace body (1) and a frame (4) movably mounted inside; Features: Blowers (3) are installed on both sides of the furnace body (1), a connecting pipe (2) is installed on the top of the furnace body (1), a slide rail (7) is movably installed inside the furnace body (1), and a frame (4) is fixed on the top of the slide rail (7), a main disc (8) is movably installed inside the frame (4), one end of the frame (4) is movably connected to a connecting plate (6), and a rotating mechanism (5) is movably installed at the bottom of the furnace body (1); A secondary screw (41) is movably installed at the corners of the frame (4), and a main screw (42) is arranged at the center of the secondary screw (41). Nuts (43) are threadedly installed on the outside of the secondary screw (41) and the main screw (42); A secondary disc (81) is rotatably mounted at the corners of the main disc (8), and a chuck (83) is fixed at the bottom end of the secondary disc (81). A tooth (82) is movably mounted on the outside of the secondary screw rod (41) on one side of the chuck (83).

2. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with an inner cavity (12), and U-shaped heating tubes are installed at equal intervals inside the inner cavity (12), a heat preservation cavity (13) is provided outside the inner cavity (12), and an outer cavity (14) is provided outside the heat preservation cavity (13), and a door body (11) is movably installed at one end of the furnace body (1).

3. A sintering oven furnace for sintering polytetrafluoroethylene according to claim 2, characterized in that: A fixing rod (111) is movably mounted on one side of the door body (11), and a fixing shaft (112) is welded to the top and bottom ends of the fixing rod (111), and a fixing buckle (113) is fixedly mounted on one end of the furnace body (1) outside the fixing shaft (112).

4. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 2, characterized in that: The top of the furnace body (1) in the middle of the connecting pipe (2) is fixedly connected with a conduit (21), and the bottom of the conduit (21) is pressed against a fan (22). One end of the connecting pipe (2) away from the conduit (21) extends to the inside of the outer cavity (14), and the outside of the outer cavity (14) at the bottom of the connecting pipe (2) is connected with a copper tube (23).

5. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 4, characterized in that: The output ends of the blowers (3) are connected to ventilation pipes (31), and one end of the ventilation pipes (31) away from the blowers (3) extends to the inside of the inner cavity (12). The copper pipes (23) are wound around the outside of the ventilation pipes (31). The secondary screws (41) penetrate the corners of the frame (4), and the primary screws (42) penetrate the middle of the primary disc (8). The teeth (82) and the chuck (83) are meshed and connected.

6. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 1, characterized in that: The rotating mechanism (5) comprises a servo motor (51), a right-angle gear set (52), a main shaft (53), a base (54), a support (55) and a clamping block (56); The main shaft (53) is rotatably mounted on the bottom of the furnace body (1); a right-angle gear set (52) is fixedly mounted on the bottom end of the main shaft (53); a servo motor (51) is mounted on the side of the right-angle gear set (52) away from the main shaft (53); a base (54) is fixedly mounted on the top end of the main shaft (53); a support (55) is fixedly mounted on the bottom end of the main screw (42) at the top of the base (54); and blocks (56) are fixedly mounted on both sides of the bottom end of the support (55).

7. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 6, characterized in that: Both sides of the top of the base (54) are provided with a card slot (541), and a convex block (542) is movably provided inside the card slot (541), and a spring (543) is fixedly installed at the bottom end of the convex block (542).

8. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 1, characterized in that: A U-shaped groove (61) is fixedly installed on the top and bottom of the door body (11) at one end of the connecting plate (6), and the U-shaped groove (61) and the connecting plate (6) are hingedly connected. A movable shaft (62) is welded to one end of the connecting plate (6), and a movable groove (63) is provided at one end of the frame (4) outside the movable shaft (62), and a sliding structure is formed between the movable shaft (62) and the movable groove (63).

9. The sintering oven furnace for sintering polytetrafluoroethylene according to claim 1, characterized in that: Slide grooves (71) are provided on both sides of the slide rail (7), slide bars (72) are fixed on both sides of the bottom end of the frame (4) inside the slide rail (7), and rollers (73) are rotatably installed on both sides of the slide bar (72), a sliding structure is formed between the slide bar (72) and the slide rail (7), and a sliding structure is formed between the roller (73) and the slide groove (71).

10. A sintering method using the sintering oven furnace for sintering polytetrafluoroethylene as claimed in claim 9, comprising the following steps, characterized in that: S1. First, the fixed rod (111) is rotated to drive the fixed shafts (112) at both ends to flip to one side, away from the fixed buckle (113), and then the door body (11) is directly pulled open. In the process of pulling the door body (11), since the frame (4) and the door body (11) are connected by the connecting plate (6), the movable shaft (62) is driven to pull the movable groove (63), so that the entire frame (4) and the main disc (8) generate outward force. The block (56) at the bottom of the main screw (42) has the same inclination angle as the protrusion (542). Under the action of the pulling force, it slides outward along the slot (541), and the protrusion (542) is squeezed and displaced downward. The block (56) continues to move outward, and the slide bar (72) at the bottom of the frame (4) slides outward along the slide rail (7), so that the frame (4) and the main disc (8) slide out of the furnace body (1); S2. The frame (4) and the secondary screw (41), and the main disc (8) and the main screw (42) are fixed by nuts (43). The frame (4) and the main disc (8) are provided with several groups. The staff can adjust the interval between the frame (4) or the main disc (8) according to the size of the polytetrafluoroethylene product. Nuts (43) are installed at the top and bottom of the connection between the frame (4) and the secondary screw (41). After the nuts (43) are rotated to a suitable position, the nuts (43) at both ends are rotated relative to each other to squeeze and fix the frame (4). Similarly, the nuts (43) at both ends of the main disc (8) are rotated to fix it on the main screw (42). ), the main disc (8) is arranged on the top of the frame (4), and after the spacing is adjusted, the polytetrafluoroethylene product to be sintered is placed on the top of the main disc (8) and the secondary disc (81). After the polytetrafluoroethylene product is placed, the door body (11) is closed and the frame (4) is pushed back to its original position through the connecting plate (6). When the block (56) at its bottom slides to the bottom of the slot (541), the protrusion (542) pops out and resets under the action of the tension of the spring (543), so as to prevent the block (56) from sliding out without external force. The frame (4) drives the polytetrafluoroethylene product into the interior of the furnace body (1), and the door body (11) is closed. S3. Start the U-shaped heating tube inside the inner cavity (12) and the blowers (3) on both sides, so that hot air is continuously supplied to the furnace body (1). A temperature sensor is installed on the inner wall of the furnace body (1) to control the internal temperature and time to ensure that the material is fully sintered. Start the servo motor (51) to drive the right-angle gear set (52) to rotate, so that the main shaft (53) and the base (54) connected thereto rotate at the same time, and the block (56) at the top of the base (54) is fixed to the main screw (42), so that the main disc (8) on the main screw (42) rotates at the same time. The servo motor (51) rotates slowly, so that the main disc (8) on the main screw (42) rotates slowly. The polytetrafluoroethylene product on the top of the disk (8) and the secondary disk (81) is evenly in contact with the hot air inside the furnace body (1). At the same time, when the main disk (8) rotates, it drives the secondary disk (81) to pass through the teeth (82) on the secondary screw (41) on one side, and the teeth (82) mesh with the chuck (83). When the chuck (83) contacts the teeth (82), the chuck (83) rotates. Due to the convex arrangement, each time the main disk (8) rotates one circle, the secondary disk (81) rotates 60 degrees, so that the polytetrafluoroethylene product near the center position can be rotated to the outside, so that the contact with the hot air is more sufficient and uniform. S4. The exhaust fan (22) draws the hot air inside the furnace body (1) into the duct (21), and then transports it to the outside of the outer cavity (14) through the connecting pipes (2) on both sides. A heat preservation cavity (13) is arranged in the middle of the inner wall of the furnace body (1). The heat preservation cavity (13) is made of a material with high thermal resistance to reduce the conduction loss of heat through the furnace wall. After the hot air enters the outside of the outer cavity (14), convection heat transfer can be formed, which helps to maintain the uniformity of the temperature inside the furnace body (1) and reduce temperature fluctuations. The hot air in the outer cavity (14) is discharged to the outside of the furnace body (1) through the copper tube (23), and the copper tube (23) is wound around the outside of the ventilation pipe (31). The copper tube (23) is a metal with good thermal conductivity. When the hot air passes through the copper tube (23), the heat will be quickly conducted to the wall of the copper tube (23), so that the copper tube (23) is heated as a whole, which has the effect of preheating the cold air in the ventilation pipe (31), thereby enhancing the heat circulation effect.

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