CN112833321B

CN112833321B - Polytetrafluoroethylene plate and manufacturing method thereof

Info

Publication number: CN112833321B
Application number: CN202011609132.6A
Authority: CN
Inventors: 姚袁生; 仇桂芹
Original assignee: Jiangsu Yihao Plastic Industry Co ltd
Current assignee: Jiangsu Yihao Plastic Industry Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-11-30
Anticipated expiration: 2040-12-30
Also published as: CN112833321A

Abstract

The embodiment of the invention provides a polytetrafluoroethylene plate and a manufacturing method thereof, wherein the polytetrafluoroethylene plate comprises a plurality of polytetrafluoroethylene plate bodies, a plurality of first lugs and second lugs are uniformly distributed on the connecting surfaces of the polytetrafluoroethylene plate bodies, and a plurality of first through holes are uniformly distributed on the first lugs and the second lugs; the first plurality of bumps and the second plurality of bumps are used as joints to splice a plurality of polytetrafluoroethylene plate bodies to be connected together, and the first plurality of through holes are clamped into a plurality of connecting devices, so that the polytetrafluoroethylene plate bodies are fixed. The firmness of the used adhesive to the polytetrafluoroethylene plate is still to be improved by arranging the connecting device; and the hot welding treatment is inconvenient to disassemble, so that the polytetrafluoroethylene plate is inconvenient to recycle.

Description

Polytetrafluoroethylene plate and manufacturing method thereof

Technical Field

The invention relates to the technical field of polytetrafluoroethylene plates, in particular to a polytetrafluoroethylene plate and a manufacturing method thereof.

Background

The polytetrafluoroethylene board is a high molecular compound formed by polymerizing tetrafluoroethylene, has excellent chemical stability and corrosion resistance, is PTFE or F4 for short, is one of the most corrosion-resistant materials in the world at present, is plastic with the best corrosion resistance, is not corroded by known acid, alkali, salt and an oxidant, can resist all other chemical drugs except molten metal sodium and liquid fluorine, is widely applied to various products which need acid and alkali resistance and organic solvents, has high sealing property, high lubrication non-adhesiveness, electric insulation property, good ageing resistance and excellent temperature resistance, and has no toxicity to people; the polytetrafluoroethylene has outstanding performance, moisture resistance, water and oil resistance, high-temperature stability, low-temperature embrittlement resistance, ageing resistance and non-inflammability, can be applied to occasions with special requirements on pipelines, moulds, pump valves, radars, high-frequency communication equipment and the like with strong corrosion, and also can be applied to the fields of high-insulation electric, electronic and military aerospace;

however, the existing polytetrafluoroethylene plate has the following problems: the wear resistance is not ideal, the mechanical strength is poor, the rigidity is not enough, the normal use is influenced, and the problem needs to be solved by adding a wear-resistant material for improvement; the polytetrafluoroethylene melt has high viscosity, even if the heating temperature is raised to the decomposition temperature of the melting point temperature, the polytetrafluoroethylene melt can not flow and can not be processed by the same forming method as other thermoplastics; almost every part molded to a specification requires a set of molds, which increases the processing cost;

polytetrafluoroethylene products are inert and therefore do not stick to anything, but we often encounter problems with bonding or welding in use, among which are: the discharge treatment method and the alkali metal solution treatment method can bond the PTFE press plate; the discharge method is that the polytetrafluoroethylene pressure plate is put in a plasma generator or a glow discharge tube, vacuumized, activated by introducing a trace amount of inert gas and then reacted with the surface of the polytetrafluoroethylene part; there are many processes for alkali metal solution treatment, the most common being chemical treatment of naphthalene-sodium complex solutions; however, no matter how the bonding is performed, the used bonding agent is influenced by factors such as temperature resistance, bonding strength and the like, and the firmness of the polytetrafluoroethylene plates is still required to be improved; and the hot welding treatment can also solve the problem that a part of the polytetrafluoroethylene plates are connected with each other, but the disassembly is inconvenient after the welding, and the polytetrafluoroethylene plates are inconvenient to recycle.

Disclosure of Invention

The invention provides a polytetrafluoroethylene board and a manufacturing method thereof, which are used for improving the influence of factors such as temperature resistance, bonding strength and the like of a used bonding agent in the background technology, and the firmness among the polytetrafluoroethylene boards needs to be improved; and the technical problems that a part of polytetrafluoroethylene plates are connected with each other, but are inconvenient to disassemble after welding and inconvenient to recycle the polytetrafluoroethylene plates can be solved by adopting hot welding treatment.

In order to solve the technical problem, the invention discloses a polytetrafluoroethylene plate which comprises a plurality of polytetrafluoroethylene plate bodies, wherein a plurality of first lugs and second lugs are uniformly distributed on the connecting surfaces of the polytetrafluoroethylene plate bodies, and a plurality of first through holes are uniformly distributed on the first lugs and the second lugs;

the first plurality of bumps and the second plurality of bumps are used as joints to splice a plurality of polytetrafluoroethylene plate bodies to be connected together, and the first plurality of through holes are clamped into a plurality of connecting devices, so that the polytetrafluoroethylene plate bodies are fixed.

Preferably, the number of the first protruding blocks and the number of the second protruding blocks are both one, the distance between the first protruding blocks and the upper surface of the polytetrafluoroethylene plate body is equal to the distance between the first protruding blocks and the second protruding blocks, and the second protruding blocks are flush with the lower surface of the polytetrafluoroethylene plate body.

Preferably, the connecting device comprises a first connecting shaft, a rotating plate, a first hinge supporting rod and a clamping rod, the upper end of the clamping rod is connected with the first hinge supporting rod in a rotating mode, the first hinge supporting rod is connected with the rotating plate in a rotating mode, the rotating plate is connected with the first connecting shaft in a rotating mode, two through holes are symmetrically formed in the left side and the right side of the lower end of the first connecting shaft, and the clamping rod penetrates through the two through holes and is connected with the first connecting shaft in a sliding mode.

Preferably, a rotating assembly is connected to a lower end of the connecting shaft, and the rotating assembly includes: the connecting shaft II is rotatably connected with a connecting groove which is arranged on the lower end face of the connecting shaft I, the lower end of the connecting shaft II is fixedly connected with the movable block I, the clamping block I is symmetrically arranged on the left side and the right side of the upper end of the movable block I, the clamping block I is slidably connected with a circular groove which is arranged on the lower end of the connecting shaft I by taking the connecting groove as the center, the upper end of the connecting shaft II is fixedly connected with the movable block II, the movable block II is arranged in a first cavity, the first cavity is arranged in the middle of the inner part of the connecting shaft I, limiting grooves I are symmetrically arranged on the left side and the right side of the first cavity, the lower side of the first cavity is communicated with the connecting groove, grooves are symmetrically arranged on the left side and the right side of the movable block II, and the spring I is arranged in the grooves, one end, far away from the groove, of the first spring is fixedly connected with the compression block.

Preferably, the connecting device is connected with a fixing component, and the fixing component comprises: the clamping device comprises a clamping block II and a clamping plate, the clamping block II is connected with a sliding groove in an axial sliding mode along a connecting shaft I, the sliding groove is symmetrically formed in the left side and the right side of the upper end of the connecting shaft I, the sliding groove is communicated with the first cavity through a limiting groove I, one side, away from the sliding groove, of the clamping block II is fixedly connected with the clamping rod, the tail end of the clamping rod is of a threaded structure, a through hole III is symmetrically formed in the left side and the right side of the clamping plate, a through hole IV is formed in the middle of the clamping plate, the clamping rod is arranged in the through hole III in a sliding mode, and the movable block I is arranged in the through hole IV.

Preferably, still include a upset strutting arrangement, upset strutting arrangement includes flip structure and bearing structure, flip structure is fixed to be set up the lower extreme of lug two, flip structure includes: the fixing plate comprises a first fixing plate, a second fixing plate, a rotating shaft, a fifth through hole and a threaded hole, wherein the first fixing plate and the second fixing plate pass through the fifth through hole and the first through hole and a plurality of differences, the second convex block on the polytetrafluoroethylene plate body is detachably connected, and the first fixing plate passes through the rotating shaft and the second fixing plate are rotatably connected.

Preferably, the support structure is symmetrically arranged on two sides of the first bump, and the support structure includes: the supporting plate I and the supporting plate II are of C-shaped structures, the supporting plate I and the supporting plate II are vertically arranged, the supporting plate I and the supporting plate II are connected with different first lugs on a polytetrafluoroethylene plate body, the right end of the supporting plate I is fixedly connected with the left end of the supporting plate II through a connecting plate, the connecting plate is obliquely arranged, limiting grooves II are symmetrically arranged on the left side and the right side of the connecting plate, a threaded hole is formed in the middle of the connecting plate, the limiting grooves II are connected with lifting blocks in a sliding mode, the lifting blocks are symmetrically arranged on the left side and the right side of the lower end of the lifting plate, compression plates are fixedly connected to the left side and the right side of the lifting plate, and the compression plates are attached to the inner walls of one side of the supporting plate I and one side of the supporting plate II.

Preferably, the method for manufacturing the polytetrafluoroethylene plate body comprises the following steps:

step 1: preparing a feedstock, the feedstock comprising: the material comprises a polytetrafluoroethylene material and barium sulfate, wherein the polytetrafluoroethylene material and the barium sulfate are smashed and sieved;

step 2: uniformly paving the raw materials on the pressing surface of the mold, and driving a pressure machine to press the raw materials in the mold into a pressing plate;

and step 3: taking out the pressing plate from the die, putting the pressing plate into a sintering furnace, and heating at the sintering temperature of 360-380 ℃ to convert the polytetrafluoroethylene from a crystalline state to an amorphous state;

and 4, step 4: after sintering, cooling to form the polytetrafluoroethylene plate;

and 5: evenly cut from top to bottom along the connection face of the polytetrafluoroethylene plate body after the shaping, will the polytetrafluoroethylene plate body cuts for the concave-convex form, obtains lug one and lug two, along being on a parallel with the direction of polytetrafluoroethylene plate body upper surface is right lug one and lug two drill, obtain through-hole one.

Preferably, the step 2 comprises the following steps:

step 21: calculating the required raw material amount according to the volume of the polytetrafluoroethylene plate body to be processed, and adding the raw material amount into a mold according to the calculated required raw material amount;

step 22: when the pressure machine is driven to press the raw materials in the die, the pressure required by pressing the polytetrafluoroethylene plate body with the required density and volume is calculated by using a formula, and then the calculated pressure value is set on the pressure machine.

Preferably, the drilling device is used for drilling the first lug and the second lug in the step 5, and the drilling device comprises:

the hydraulic cylinders are symmetrically arranged on the left side and the right side inside the base, the extending ends of the hydraulic cylinders penetrate through the upper end of the base and are fixedly connected with a lifting platform, the upper end of the lifting platform is contacted with the polytetrafluoroethylene plate, a second cavity is arranged in the middle of the inside of the base, a second spring is fixedly arranged at the bottom of the second cavity, a pressing block is fixedly connected to one side, away from the bottom of the second cavity, of the second spring, the pressing block penetrates through the lifting platform and is contacted with the polytetrafluoroethylene plate body, a sixth spring is arranged inside the upper end of the pressing block, one side, away from the pressing block, of the sixth spring is fixedly connected with a positioning block, the upper end of the positioning block is overlapped with the circle center of the first through hole, and buffer blocks are fixedly arranged on the left side and the right side of the upper end of the base;

the left side and the right side of the motor shell are symmetrically provided with a second hinged rod, the second hinged rod is rotatably connected with the motor shell, one side, away from the motor shell, of the second hinged rod is rotatably connected with a third movable block, the lower end of the third movable block is fixedly connected with an installation seat, the installation seat is rotatably connected with a roller, the rear end of the third movable block is slidably connected with the front end of a rear shell, the front end of the rear shell is slidably connected with a plurality of supporting rods along the vertical direction, and the plurality of supporting rods are fixedly connected with the motor shell;

the two pressure plates are connected with the two side plates in a sliding mode respectively, the two side plates are fixedly arranged on the left side and the right side of the upper end face of the base, the lower end of each pressure plate is fixedly connected with a third spring, one end, far away from the pressure plates, of the third spring is fixedly connected with the lifting table, the upper end of each pressure plate is in contact with the roller, and a limiting block is fixedly arranged at the upper end of one side, close to the center of the base, of each pressure plate;

the rotary shell, the turning block with the motor casing lower extreme rotates to be connected, the rotary shell lower extreme opening part fixedly connected with bearing, the inside circumference equipartition of rotary shell is equipped with sword type groove, sword type inslot portion is equipped with the sword type pole, the sword type pole is kept away from the one end setting in sword type groove is inside the fixed slot, the inside spring four that is equipped with of fixed slot, spring four and sword type pole fixed connection, the fixed slot sets up along drill bit fixture block side circumference equipartition, drill bit fixture block lower extreme and the middle fixed spring five that is equipped with of rotating shell lower extreme inner wall, be equipped with the draw-in groove in the middle of the drill bit fixture block, the draw-in groove can be dismantled with the drill bit and be connected, the center of drill bit with the upper end center of locating piece is in same axis.

Preferably, the method further comprises the following steps:

a speed sensor: the speed sensor is arranged on a male die of the press machine and used for detecting the descending speed value of the male die of the press machine;

a distance meter: uniformly paving the raw material on the pressing surface of the mold, and measuring the distance value from the upper surface of the raw material in the mold to the opening of the mold by using a distance measuring instrument;

a timer: the timer is arranged outside the press machine and used for recording the working time of the press machine;

a controller: the controller is electrically connected with the speed sensor, the distance measuring instrument and the timer;

the controller controls the timer to work based on the speed sensor and the distance measuring instrument, and comprises the following steps:

the method comprises the following steps: the controller controls the speed sensor to work in a preset detection period based on the timer, and calculates a target pressure value required to be input by the press machine according to a formula (1) according to a change value of the speed value detected by the speed sensor;

（1）

wherein,

is the target pressure value required to be input by the press,

in order to count the number of cavities of the press,

is the density of the barium sulfate and is,

is the density of the polytetrafluoroethylene raw material,

to the desired polytetrafluoroethyleneThe volume of the plate is such that,

is the change times of the detection value of the speed sensor in the preset detection period, t is the duration of the detection period,

the change value of the detection value of the speed sensor at the ith time in the preset detection period,

acting force is applied to the working plunger of the press,

is the highest pressure value of the oil in the press,

is the pressure coefficient;

step two: the controller calculates the weight of the target raw material of the polytetrafluoroethylene to be added by using the target pressure value required to be input by the press machine calculated in the step one, the detection value of the distance meter and a formula (2);

（2）

wherein,

the target raw material weight of the required added polytetrafluoroethylene,

in order to obtain a coefficient of friction between the material introduced into the press mould and the inner wall of the mould,

in order to detect the value of the rangefinder before pressing,

in order to detect the value of the rangefinder after pressing,

is the modulus of elasticity of the polytetrafluoroethylene and,

is the modulus of elasticity of the barium sulfate,

is the cross-sectional area of the press die,

in order to lubricate the pressure-sticking coefficient of the extrusion aid,

is the poisson's ratio of the polytetrafluoroethylene,

is the poisson ratio of the barium sulfate,

is the ratio of barium sulfate to polytetrafluoroethylene in the raw material.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a polytetrafluoroethylene plate according to the present invention;

FIG. 2 is a schematic structural view of the polytetrafluoroethylene plate of the present invention after being turned over;

FIG. 3 is a schematic view of a connection structure of a plurality of PTFE plates according to the present invention;

FIG. 4 is a schematic view of the connecting device of the present invention;

FIG. 5 is a schematic structural diagram of a first connecting shaft according to the present invention;

FIG. 6 is a schematic diagram of the internal structure of the first cavity according to the present invention;

FIG. 7 is a schematic view of a card board structure of the present invention;

FIG. 8 is a schematic structural view of the turning support device of the present invention;

FIG. 9 is a schematic diagram of an inverted structure of the present invention;

FIG. 10 is a schematic view of a support structure of the present invention;

FIG. 11 is a schematic view of the lift block structure of the present invention;

FIG. 12 is a schematic view of a connection plate structure of the present invention;

FIG. 13 is a schematic view of the attachment of support domain PTFE sheets of the present invention;

FIG. 14 is a schematic view of the construction of the drilling apparatus of the present invention;

FIG. 15 is a side view of the drilling apparatus of the present invention;

FIG. 16 is a schematic view of the internal structure of the rotating case of the present invention;

FIG. 17 is a top view of the internal structure of the rotating case of the present invention;

FIG. 18 is a schematic view of a compact structure of the present invention.

In the figure: 1. a polytetrafluoroethylene plate body; 2. a first bump; 3. a second bump; 4. a first through hole; 5. clamping a plate; 501. a third through hole; 502. a fourth through hole; 6. a first clamping block; 7. a second movable block; 701. a groove; 8. a second clamping block; 9. a rotating plate; 10. a first supporting hinge rod; 11. a clamping rod; 12. a second connecting shaft; 13. a first connecting shaft; 1301. connecting grooves; 1302. a first cavity; 1303. a sliding groove; 1304. a circular groove; 1305. a second through hole; 1306. a first limiting groove; 14. a first movable block; 15. a first spring; 16. compressing the block; 17. a first fixing plate; 18. a rotating shaft; 19. a second fixing plate; 20. a fifth through hole; 21. a connecting plate; 2101. a second limiting groove; 2102. a threaded hole; 22. a first supporting block; 23. a lifting plate; 2301. a compression plate; 24. a second supporting block; 25. a lifting block; 26. a motor housing; 27. rotating the shell; 2701. a cutter-shaped groove; 28. a second supporting hinge rod; 29. a third movable block; 30. a drum; 31. pressing a plate; 32. a buffer block; 33. a lifting platform; 34. a hydraulic cylinder; 35. a second cavity; 36. a second spring; 37. briquetting; 3701. positioning blocks; 3702. a sixth spring; 38. a base; 39. a support bar; 40. a rear housing; 41. a drill bit fixture block; 4101. a fourth spring; 4102. fixing grooves; 4103. a card slot; 42. a fifth spring; 43. a bearing; 44. a drill bit; 45. a side plate; 46. a limiting block; 47. a third spring; 48. and (7) mounting a seat.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.

The present invention provides the following examples.

Example 1

The embodiment of the invention provides a polytetrafluoroethylene plate, which comprises a plurality of polytetrafluoroethylene plate bodies 1, wherein a plurality of first lugs 2 and second lugs 3 are uniformly distributed on the connecting surfaces of the polytetrafluoroethylene plate bodies 1, and a plurality of first through holes 4 are uniformly distributed on the first lugs 2 and the second lugs 3; the structures of the first bump 2 and the second bump 3 include, but are not limited to, a rectangular structure and a wedge-shaped structure.

A plurality of 2 and two 3 lugs of lug splice a plurality of polytetrafluoroethylene plate bodies 1 that will connect together as the joint, will a plurality of connecting device are gone into to the card in a plurality of through-holes 4, make a plurality of polytetrafluoroethylene plate bodies 1 are fixed.

The working principle of the technical scheme is as follows:

the first lug 2 and the second lug 3 are used as joints to splice the polytetrafluoroethylene plate bodies 1 required to be connected together, the first lug 2 and the first through hole 4 in the second lug 3 are located on the same axis, the connecting device is clamped into the first through hole 4, the polytetrafluoroethylene plate bodies 1 required to be connected are fixed together to form mechanical connection, and the polytetrafluoroethylene plate bodies 1 can be spliced together to form a polytetrafluoroethylene plate with a target size specification.

The beneficial effects of the above technical scheme are:

the first lug 2 and the second lug 3 are used as joints, so that the contact area between polytetrafluoroethylene plate bodies 1 required to be connected is increased, the first lug 2 and the second lug 3 are wedge-shaped structures or rectangular structures, so that the movement of the polytetrafluoroethylene plate bodies 1 in the vertical direction can be limited, the stability is increased, mechanical connection is formed between the polytetrafluoroethylene plate bodies by arranging a connecting device, the polytetrafluoroethylene plate bodies 1 connected with each other are convenient to disassemble and assemble, the polytetrafluoroethylene plates with required size can be flexibly spliced, the mechanical connection solves the problem that the viscosity of a polytetrafluoroethylene melt is high, and the polytetrafluoroethylene melt cannot flow even if the heating temperature is raised to the decomposition temperature of the melting point temperature, and cannot be processed by the same forming method as other thermoplastic plastics; almost every part molded to a specification requires a set of molds, which increases the processing cost; the used adhesive is influenced by factors such as temperature resistance, adhesive strength and the like, and the firmness of the polytetrafluoroethylene plates needs to be improved; and the technical problems that a part of polytetrafluoroethylene plates are connected with each other, but are inconvenient to disassemble after welding and inconvenient to recycle the polytetrafluoroethylene plates can be solved by adopting hot welding treatment.

Example 2

On the basis of embodiment 1, as shown in fig. 1 to 3, the number of the first bump 2 and the second bump 3 is one, the distance between the first bump 2 and the upper surface of the ptfe sheet 1 is equal to the distance between the first bump 2 and the second bump 3, and the second bump 3 is flush with the lower surface of the ptfe sheet 1.

The working principle of the technical scheme is as follows:

the one polytetrafluoroethylene plate body is turned over by 180 degrees, the first lug of the turned polytetrafluoroethylene plate body is inserted between the first lug and the second protruding block of the non-turned polytetrafluoroethylene plate body, so that the two polytetrafluoroethylene plate bodies are spliced together, and the first lug 2 of the polytetrafluoroethylene plate body and the first through hole 4 on the second lug 3 are kept on the same axis.

The beneficial effects of the above technical scheme are:

the distance between the first lug 2 and the upper surface of the polytetrafluoroethylene plate body 1 is equal to the distance between the first lug 2 and the second lug 3, and the second lug 3 is flush with the lower surface of the polytetrafluoroethylene plate body 1, so that the surfaces of the polytetrafluoroethylene plate body 1 spliced together are smooth, and gaps are small.

Example 3

On the basis of embodiment 1, as shown in fig. 5, the connecting device includes a first connecting shaft 13, a rotating plate 9, a first hinge rod 10 and a clamping rod 11, the upper end of the clamping rod 11 is rotatably connected with the first hinge rod 10, the first hinge rod 10 is rotatably connected with the rotating plate 9, the rotating plate 9 is rotatably connected with the first connecting shaft 13, two through holes 1305 are symmetrically formed in the left side and the right side of the lower end of the first connecting shaft 13, and the clamping rod 11 penetrates through the two through holes 1305 and is slidably connected with the first connecting shaft 13.

The beneficial effects of the above technical scheme are:

the first connecting shaft 13 is inserted into the first through hole 4, the length of the first connecting shaft 13 is larger than that of the first through hole 4, the polytetrafluoroethylene plate bodies 1 which are spliced together are prevented from moving in the horizontal direction, a limiting effect is achieved, the clamping rod 11 is pushed, the clamping rod 11 pushes the first hinge rod 10 to rotate outwards, the rotating plates 9 rotate outwards until the rotating plates 9 on the left side and the right side of the first connecting shaft 13 are 180 degrees, the rotating plates 9 are in contact with the bottom end of the spliced part, the clamping rod 11 is fixed with the upper end of the spliced part and used for clamping the first connecting shaft 13 with the spliced part, and the first connecting shaft 13 is prevented from being separated from the first through hole 4.

Example 4

On the basis of embodiment 3, as shown in fig. 4 to 6, a rotating assembly is connected to a lower end of the first connecting shaft 13, and the rotating assembly includes: the connecting shaft II 12 is rotatably connected with a connecting groove 1301, the connecting groove 1301 is arranged on the lower end face of the connecting shaft I13, the lower end of the connecting shaft II 12 is fixedly connected with the movable block I14, the clamping blocks I6 are symmetrically arranged on the left side and the right side of the upper end of the movable block I14, the clamping blocks I6 are slidably connected with a circular groove 1304, the circular groove 1304 is arranged at the lower end of the connecting shaft I13 by taking the connecting groove 1301 as the center, the upper end of the connecting shaft II 12 is fixedly connected with the movable block II 7, the movable block II 7 is arranged in a first cavity 1302, the first cavity 1302 is arranged in the middle of the inside of the connecting shaft I13, limiting grooves 1306 are symmetrically arranged on the left side and the right side of the first cavity 1302, the lower side of the first cavity 1302 is communicated with the connecting groove 1301, the left side and the right side of the second movable block 7 are symmetrically provided with grooves 701, the first spring 15 is arranged inside the grooves 701, and one end, far away from the grooves 701, of the first spring 15 is fixedly connected with the compression block 16.

The beneficial effects of the above technical scheme are:

the compression block 16 is in contact with the front end face and the rear end face of the first cavity 1302 in a default state, the first spring 15 is in a compression state at the moment, the first movable block 14 is rotated, the first fixture block 6 slides along the circular groove 1304 to drive the second connecting shaft 12 to rotate, the second movable block 7 starts to rotate, the compression block 16 enters the first limiting groove 1306 along with the rotation of the second movable block 7, when the connecting device is disassembled, the first movable block 14 is rotated, the compression block 16 is separated from the first limiting groove 1306, the first movable block 14 is rotated to facilitate the disassembly and assembly of the connecting device, and the disassembly and assembly between the polytetrafluoroethylene plate bodies 1 are flexible and convenient.

Example 5

On the basis of embodiment 4, as shown in fig. 4-7, the connecting device is connected with a fixing component, and the fixing component comprises: the clamping device comprises a second clamping block 8 and a clamping plate 5, the second clamping block 8 is connected with a sliding groove 1303 in a sliding mode along the axial direction of the first connecting shaft 13, the sliding groove 1303 is symmetrically arranged on the left side and the right side of the upper end of the first connecting shaft 13, the sliding groove 1303 is communicated with the first cavity 1302 through a first limiting groove 1306, one side, away from the sliding groove 1303, of the second clamping block 8 is fixedly connected with the clamping rod 11, the tail end of the clamping rod 11 is of a threaded structure, three through holes 501 are symmetrically arranged on the left side and the right side of the clamping plate 5, a fourth through hole 502 is formed in the middle of the clamping plate 5, the clamping rod 11 is arranged inside the third through hole 501 in a sliding mode, and the first movable block 14 is arranged inside the fourth through hole 502.

The working principle of the technical scheme is as follows:

after the polytetrafluoroethylene plate bodies 1 required to be connected are spliced together, the first connecting shaft 13 is inserted into the first through hole 4, the surface of a lug is attached to the clamping plate 5, the upper end of the first connecting shaft 13 extends out of the lower end of the splicing part at the moment, the clamping rod 11 is pushed, the clamping rod 11 pushes the second fixture block 8 to slide in the sliding groove 1303, the rotating plates 9 on the left side and the right side of the first connecting shaft 13 are 180 degrees, the rotating plates 9 have a certain distance from the lower end of the splicing part at the moment, the first movable block 14 is pulled, the rotating plates 9 are in contact with the lower end of the splicing part, the clamping plate 5 is pressed downwards, the clamping plate 5 is attached to the upper end of the splicing part, and the clamping plate 5 and the splicing part are fixed through a nut and a threaded structure at the tail end of the clamping rod 11.

The beneficial effects of the above technical scheme are:

through setting up fixture block two 8, make kelly 11 move along the axial direction of connecting axle one 13 all the time, prevent that the skew from appearing in the removal process of kelly 11, lead to unable promotion kelly 11, rotor plate 9 is unable to rotate, can't fix a plurality of polytetrafluoroethylene plate bodys 1 after splicing together, it is fixed with cardboard 5 and concatenation department through set up the helicitic texture at the end of kelly 11, make a plurality of polytetrafluoroethylene plate bodys 1 fixed more firm, prevent that cardboard 5 is not hard up to lead to rocking or even separating between a plurality of polytetrafluoroethylene plate bodys 1, make the polytetrafluoroethylene plate pass through mechanical structure fixed together.

Example 6

On the basis of embodiment 1, as shown in fig. 8 to 13, the apparatus further includes an overturning supporting device, the overturning supporting device includes an overturning structure and a supporting structure, the overturning structure is fixedly disposed at the lower end of the second bump 3, and the overturning structure includes: the polytetrafluoroethylene plate comprises a first fixing plate 17, a second fixing plate 19, a rotating shaft 18 and a fifth through hole 20, wherein the first fixing plate 17 and the second fixing plate 19 are detachably connected with a plurality of different bumps 3 on the polytetrafluoroethylene plate 1 through the fifth through hole 20 and the first through hole 4, optionally, the polytetrafluoroethylene plate 1 can be connected with plates made of different materials through the first fixing plate 17 and the second fixing plate 19, and the first fixing plate 17 is rotatably connected with the second fixing plate 19 through the rotating shaft 18;

the supporting structure is symmetrically arranged on two sides of the first bump 2, and the supporting structure comprises: the device comprises a first supporting block 22, a second supporting block 24, a connecting plate 21 and a lifting plate 23, wherein the first supporting block 22 and the second supporting block 24 are of C-shaped structures, the first supporting block 22, the first supporting block 22 and the second supporting block 24 are vertically arranged, the first supporting block 22 and the second supporting block 24 are connected with different first lugs 2 on the polytetrafluoroethylene plate body 1, the right end of the first supporting block 22 is fixedly connected with the left end of the second supporting block 24 through a connecting plate 21, the connecting plate 21 is obliquely arranged, two limiting grooves 2101 are symmetrically arranged at the left side and the right side of the connecting plate 21, a threaded hole 2102 is arranged in the middle of the connecting plate 21, the second limiting groove 2101 is connected with the lifting block 25 in a sliding mode, the lifting blocks 25 are symmetrically arranged at the left side and the right side of the lower end of the lifting plate 23, the compression plates 2301 are fixedly connected at the left side and the right side of the lifting plate 23, the compression plate 2301 is respectively attached to the inner walls of one side of the first support block 22 and the second support block 24.

The beneficial effects of the above technical scheme are:

make to rotate between the polytetrafluoroethylene plate body 1 and connect through setting up flip structure, can go into connecting device card in five 20 and the through-hole 4 of through-hole after the upset, make it fixed, it is convenient to make to dismantle between the polytetrafluoroethylene plate 1, both can save space, also can change the size of polytetrafluoroethylene plate 1, also can be connected panel and polytetrafluoroethylene plate body 1 of different materials through flip structure, in the in-process of polytetrafluoroethylene plate body 1 upset, twist a bolt in screw hole 2012, make it promote lifter plate 23 and move along bolt moving direction, compress plate 2301 fixed with lifter plate 23 inward movement, compress tightly the polytetrafluoroethylene plate body 1 of putting into supporting shoe one 22 and two supporting shoes 22, prevent that polytetrafluoroethylene plate body 1 from coming loose, can use with polytetrafluoroethylene stair etc., the range of application of polytetrafluoroethylene plate body 1 has been increased, avoid receiving the influence that the bonding leads to connecting unstably, The disassembly is inconvenient due to the influence of welding;

example 7

On the basis of the above embodiment 1, as shown in fig. 1 to 3, the method for manufacturing the polytetrafluoroethylene plate body 1 includes the following steps:

and step 3: taking out the pressing plate from the die, putting the pressing plate into a sintering furnace, heating at the sintering temperature of 360-380 ℃, heating to 300 ℃ at the speed of 30-40 ℃/h, heating at the speed of 10-20 ℃/h, and raising the sintering temperature as far as possible within the thermal stability range of the polytetrafluoroethylene material so as to convert the polytetrafluoroethylene from a crystalline state to an amorphous state;

and 4, step 4: after sintering, cooling to form the polytetrafluoroethylene plate, wherein the temperature of the pressure plate is generally reduced at 12-24 ℃/h, the pressure plate is slowly cooled at about 327 ℃ of the melting point of the polytetrafluoroethylene, the pressure plate is uniformly cooled to below 317 ℃, and the pressure plate is cooled to room temperature at the speed of 20-50 ℃/h to obtain the polytetrafluoroethylene plate;

and 5: evenly cut about the face of connecting of the polytetrafluoroethylene plate body 1 after the shaping, will polytetrafluoroethylene plate body 1 cuts for unsmooth form, then regards the lug as the joint, will required a plurality of polytetrafluoroethylene plate body 1 splices together, along being on a parallel with the direction of 1 upper surface of polytetrafluoroethylene plate body is drilled the lug, obtains through-hole 4, goes into connecting device card into through-hole 4 for a plurality of required connections polytetrafluoroethylene plate body 1 is fixed.

The beneficial effects of the above technical scheme are:

the barium sulfate is added in the step 1, so that the wear resistance of the polytetrafluoroethylene plate can be improved, the problems of unsatisfactory wear resistance, poor mechanical strength and insufficient rigidity of the polytetrafluoroethylene plate are solved, the lubrication extrusion assistant is added, so that the adhesion among particles can be increased, the friction among polytetrafluoroethylene particles and between a polytetrafluoroethylene material and a mould can be reduced, the processing performance is improved, and petroleum ether, toluene, acetone, kerosene, paraffin and the like are usually adopted

The cooling method in the step 4 can improve the crystallinity of the polytetrafluoroethylene plate body 1, improve the strength, hardness and rigidity of the polytetrafluoroethylene plate body 1, and improve the chemical reagent resistance and dimensional stability of the polytetrafluoroethylene plate body 1.

Example 8

On the basis of the above-mentioned embodiment 7, the step 2 includes the steps of,

step 21: calculating the required raw material amount according to the volume of the polytetrafluoroethylene plate body 1 to be processed, and adding the raw material amount into a mold according to the calculated required raw material amount;

step 22: when the press machine is driven to press the raw materials in the die, the pressure required for pressing the polytetrafluoroethylene plate body 1 with the required density and volume is calculated by using a formula, and then the calculated pressure value is set on the press machine.

The beneficial effects of the above technical scheme are that:

the situation that the normal use is influenced because the pressed plate is different from the required polytetrafluoroethylene plate in specification due to excessive or insufficient added polytetrafluoroethylene raw materials and overlarge pressure deviation is prevented.

Example 9

On the basis of the above embodiment 7, as shown in fig. 14 to 18, a drilling device is further included, the drilling device is used for drilling the first bump 2 and the second bump 3 in the step 5, and the drilling device includes:

the hydraulic cylinder 34 is symmetrically arranged on the left side and the right side inside the base 38, the extending end of the hydraulic cylinder 34 penetrates through the upper end of the base 38 and is fixedly connected with the lifting platform 33, the upper end of the lifting platform 33 is contacted with the polytetrafluoroethylene plate 1, the middle part inside the base 38 is provided with a second cavity 35, a second spring 36 is fixedly arranged at the bottom of the second cavity 35, a pressing block 37 is fixedly connected to one side of the second spring 36 away from the bottom of the second cavity 35, the pressing block 37 penetrates through the lifting table 33 to be in contact with the polytetrafluoroethylene plate body 1, a spring six 3702 is arranged inside the upper end of the pressing block 37, one side of the spring six 3702 far away from the pressing block 37 is fixedly connected with a positioning block 3701, the upper end of the positioning block 3701 is overlapped with the circle center of the first through hole 4, the left side and the right side of the upper end of the base 38 are fixedly provided with buffer blocks 32, and the buffer blocks 32 can be made of rubber;

a second hinge rod 28 is symmetrically arranged on the left side and the right side of the motor casing 26, the second hinge rod 28 is rotatably connected with the motor casing 26, one side, far away from the motor casing 26, of the second hinge rod 28 is rotatably connected with a third movable block 29, the lower end of the third movable block 29 is fixedly connected with an installation seat 48, the installation seat 48 is rotatably connected with a roller 30, the rear end of the third movable block 3 is slidably connected with the front end of a rear casing 40, the front end of the rear casing 40 is slidably connected with a plurality of support rods 39 in the vertical direction, and the plurality of support rods 39 are fixedly connected with the motor casing 26;

the two pressing plates 31 are slidably connected with the two side plates 45 respectively, the two side plates 45 are fixedly arranged on the left side and the right side of the upper end face of the base 38, the lower end of the pressing plate 31 is fixedly connected with a third spring 47, one end, far away from the pressing plate 31, of the third spring 47 is fixedly connected with the lifting table 33, the upper end of the pressing plate 31 is in contact with the roller 30, and the upper end of one side, close to the center of the base 38, of the pressing plate 31 is fixedly provided with a limiting block 46; a rubber pad can be added on the lower surface of the pressing plate 31,

the rotary casing 27, the rotary block 27 is rotatably connected with the lower end of the motor casing 26, a bearing 43 is fixedly connected with an opening at the lower end of the rotary casing 2, knife-shaped grooves 2701 are uniformly distributed in the rotary casing 27 in the circumferential direction, knife-shaped rods 42 are arranged in the knife-shaped grooves 2701, one ends of the knife-shaped rods 42, which are far away from the knife-shaped grooves 2701, are arranged in fixed grooves 4102, four springs 4101 are arranged in the fixed grooves 4102, the four springs 4101 are fixedly connected with the knife-shaped rods 42, the fixed grooves 4102 are uniformly distributed in the circumferential direction along drill fixture blocks 41, five springs 42 are fixedly arranged between the lower end of the drill fixture block 41 and the inner wall of the lower end of the rotary casing 27, a clamping groove 4103 is arranged in the middle of the drill fixture block 41, the clamping groove 4103 is detachably connected with the drill 44, and the center of the drill 44 and the center of the upper end of the positioning block 3701 are on the same axis.

The working principle of the technical scheme is as follows:

a motor is arranged in the motor shell 26, when drilling is carried out on the first projection 2 and the second projection 3, firstly, the polytetrafluoroethylene plate 1 is placed on the lifting platform 33, the center of a position needing to be punched is aligned with the positioning block 3701, the positioning block 3701 enters the pressing block 37 under the action of the gravity of the polytetrafluoroethylene plate 1, the six springs 3702 are compressed, the hydraulic cylinder 34 is started, the lifting platform 33 is controlled to move up and down, so that the upper end surface of the polytetrafluoroethylene plate 1 is flush with the upper surface of the buffer block 32, the motor is started, the rotating shell 27 rotates in the counterclockwise direction, the drill bit fixture block 41 is driven to rotate, the four springs 4101 in the drill bit fixture block 41 are acted by the knife-shaped groove 2701 to start stretching, meanwhile, the motor shell 26 starts to slide downwards along the rear shell 40 to push the hinge rod 28 to rotate upwards, so that the three movable blocks 29 are pushed to move outwards, and the roller 30 at the lower ends of the three movable blocks 29 move outwards along the pressing plate 31, make clamp plate 31 remove down, the compression of spring three 47, after cylinder 30 removed the left end face of clamp plate 31, clamp plate 31 stopped the downstream, and clamp plate 31 just compresses tightly buffer seat 32 and polytetrafluoroethylene board 1 this moment, and motor casing 26 continues the downstream, accomplishes to lug one 2 and lug two 3 and punches, and the completion of punching, motor casing 26 moved up, and cylinder 30 removed the left end face of clamp plate 31, and under spring 47's effect, clamp plate 31 restores to the original position.

The beneficial effects of the above technical scheme are:

by arranging the knife-shaped groove 2701 and the knife-shaped rod 42, the rotating direction of the rotating shell 27 and the drill fixture block 41 is consistent, and the rotating shell is subjected to the elastic action of the spring four 4101 in the rotating process, so that the drill fixture block 41 is prevented from shaking in the horizontal direction during drilling, the spring five 42 is fixedly arranged between the lower end of the drill fixture block 41 and the inner wall of the lower end of the rotating shell 27, so that the shaking of the drill fixture block 41 in the vertical direction can be reduced, the precision during drilling is ensured, the phenomenon that the drilling deviation is too large and the drill fixture block 41 cannot be used due to the shaking during drilling is avoided, the positioning block 3701 is arranged, the preventing position of the polytetrafluoroethylene plate 1 can be more accurately positioned, the drilling position deviation is prevented, the buffer block 32 is arranged to position the left and right, so that the drilling device can be suitable for plates with different thicknesses, only the upper surface of the target plate needs to be aligned with the buffer block 32, and the buffer function is performed on the pressure plate 31, prevent the in-process clamp plate 31 that compresses tightly at too fast to cause destruction to polytetrafluoroethylene board 1, the clamp plate 31 lower surface sets up rubber both can play cushioning effect also can increase and polytetrafluoroethylene board 1 between frictional force, place polytetrafluoroethylene board 1 and take place the skew at drilling in-process, through control clamp plate 31 and the synchronous downstream of drill bit 44, carry out the operation of fixing to polytetrafluoroethylene board 1 when having reduced drilling, improved drilling efficiency, and it is more convenient to operate.

Example 10

On the basis of the above embodiment 8, the present invention further includes:

（1）

wherein,

is the target pressure value required to be input by the press,

in order to count the number of cavities of the press,

is the density of the barium sulfate and is,

is the density of the polytetrafluoroethylene raw material,

in order to be the volume of the polytetrafluoroethylene sheet required,

acting force is applied to the working plunger of the press,

is the highest pressure value of the oil in the press,

is the pressure coefficient;

step two: the controller calculates the weight of the target raw material of the polytetrafluoroethylene to be added by using the pressure input by the press machine calculated in the step one, the detection value of the distance measuring instrument and a formula (2);

（2）

wherein,

the target raw material weight of the required added polytetrafluoroethylene,

in order to obtain a coefficient of friction between the material introduced into the mould and the inner wall of the mould,

in order to detect the value of the rangefinder before pressing,

in order to detect the value of the rangefinder after pressing,

is the modulus of elasticity of the polytetrafluoroethylene and,

is the modulus of elasticity of the barium sulfate,

is the cross-sectional area of the mold,

in order to lubricate the pressure-sticking coefficient of the extrusion aid,

is the poisson's ratio of the polytetrafluoroethylene,

is sulfuric acidThe poisson's ratio of the barium,

is the ratio of barium sulfate to polytetrafluoroethylene in the raw material.

The working principle of the technical scheme is as follows:

firstly, arranging a speed sensor on a male die of a press machine, and detecting the descending speed value of the male die of the press machine; the distancer is external connection, the operator at every turn uses the distancer to detect the raw materials upper surface in the mould apart from the die opening's distance value at first when press input pressure, set up a time-recorder in the press outside, use the controller with speed sensor, distancer and time-recorder electric connection, the controller calculates the change value of speed sensor detection velocity value in this time quantum according to the time-recorder every interval a fixed time, utilize formula (1) to calculate the required target pressure value of inputing of press, the required target pressure value of inputing of press that the controller calculated according to formula (1), the target raw materials weight of the required polytetrafluoroethylene that adds is calculated to the detected value and formula (2) of distancer.

The beneficial effects of the above technical scheme are:

consideration in equation (1)

,

The value of the pressure coefficient is in the range of 1-2, so that the calculation result is more reliable, the target pressure value required to be input by the press machine is calculated by using the formula (1) when the raw material in the die is pressed in the step 22, the press machine is controlled to press the raw material in the die, the deformation conditions of foaming, internal bulging and the like on the surface of the polytetrafluoroethylene plate caused by insufficient pressure are avoided, and the consideration is given to the formula (2)

And polymerization during pressingThe amount of the tetrafluoroethylene friction loss,

the value of the pressure viscosity coefficient of the lubrication extrusion aid is 1.3-3, so that the calculation result is more reliable, and the target raw material weight of the polytetrafluoroethylene required to be added, which is calculated in the formula (2) in the step 21, is utilized to prevent the situation that the specification of the pressed plate is different from that of the required polytetrafluoroethylene plate and the normal use is influenced because the added polytetrafluoroethylene raw material is too much or too little.

Claims

1. A polytetrafluoroethylene plate is characterized by comprising a plurality of polytetrafluoroethylene plate bodies (1), wherein a plurality of first lugs (2) and second lugs (3) are uniformly distributed on the connecting surfaces of the polytetrafluoroethylene plate bodies (1), and a plurality of first through holes (4) are uniformly distributed on the first lugs (2) and the second lugs (3);

the first bumps (2) and the second bumps (3) are used as joints to splice a plurality of polytetrafluoroethylene plate bodies (1) to be connected together, and the first through holes (4) are clamped into a plurality of connecting devices, so that the polytetrafluoroethylene plate bodies (1) are fixed;

the connecting device comprises a first connecting shaft (13), a rotating plate (9), a first hinge supporting rod (10) and a clamping rod (11), the upper end of the clamping rod (11) is rotatably connected with the first hinge supporting rod (10), the first hinge supporting rod (10) is rotatably connected with the rotating plate (9), the rotating plate (9) is rotatably connected with the first connecting shaft (13), through holes two (1305) are symmetrically formed in the left side and the right side of the lower end of the first connecting shaft (13), and the clamping rod (11) penetrates through the through holes two (1305) and is in sliding connection with the first connecting shaft (13);

the connecting axle (13) lower extreme is connected with runner assembly, runner assembly includes: the connecting shaft I (12), the connecting shaft II (12), the movable block I (14), the clamping block I (6), the movable block II (7), the spring I (15) and the compression block (16), the connecting shaft II (12) is rotatably connected with the connecting groove (1301), the connecting groove (1301) is arranged on the lower end face of the connecting shaft I (13), the lower end of the connecting shaft II (12) is fixedly connected with the movable block I (14), the clamping block I (6) is symmetrically arranged on the left side and the right side of the upper end of the movable block I (14), the clamping block I (6) is slidably connected with the circular groove (1304), the circular groove (1304) is arranged at the lower end of the connecting shaft I (13) by taking the connecting groove (1301) as the center, the upper end of the connecting shaft II (12) is fixedly connected with the movable block II (7), the movable block II (7) is arranged in the first cavity (1302), the first cavity (1302) is arranged in the middle of the connecting shaft I (13), limiting grooves (1306) are symmetrically formed in the left side and the right side of the first cavity (1302), the lower side of the first cavity (1302) is communicated with the connecting groove (1301), grooves (701) are symmetrically formed in the left side and the right side of the second movable block (7), the first spring (15) is arranged inside each groove (701), and one end, far away from the groove (701), of the first spring (15) is fixedly connected with the compression block (16);

the connecting device is connected with fixed subassembly, fixed subassembly includes: the clamping block II (8) is connected with the sliding groove (1303) in a sliding mode along the axial direction of the connecting shaft I (13), the sliding groove (1303) is symmetrically formed in the left side and the right side of the upper end of the connecting shaft I (13), the sliding groove (1303) is communicated with the first cavity (1302) through the limiting groove I (1306), one side, far away from the sliding groove (1303), of the clamping block II (8) is fixedly connected with the clamping rod (11), the tail end of the clamping rod (11) is of a threaded structure, the left side and the right side of the clamping plate (5) are symmetrically provided with a through hole III (501), the middle of the clamping plate (5) is provided with a through hole IV (502), the clamping rod (11) is arranged in the through hole III (501) in a sliding mode, and the movable block I (14) is arranged in the through hole IV (502).

2. A ptfe sheet according to claim 1, wherein the number of the first projections (2) and the second projections (3) is one, the distance between the first projections (2) and the upper surface of the ptfe sheet (1) is equal to the distance between the first projections (2) and the second projections (3), and the second projections (3) are flush with the lower surface of the ptfe sheet (1).

3. A polytetrafluoroethylene sheet according to claim 1, wherein: still include a upset strutting arrangement, upset strutting arrangement includes flip structure, flip structure is fixed to be set up the lower extreme of lug two (3), flip structure includes: the fixing plate comprises a first fixing plate (17), a second fixing plate (19), a rotating shaft (18), a fifth through hole (20) and threaded holes, wherein the first fixing plate (17) and the second fixing plate (19) are detachably connected with second bumps (3) on a plurality of different polytetrafluoroethylene plate bodies (1) through the fifth through hole (20) and a first through hole (4), and the first fixing plate (17) is rotatably connected with the second fixing plate (19) through the rotating shaft (18);

the supporting structure is symmetrically arranged on two sides of the first bump (2), and comprises: the supporting plate comprises a first supporting block (22), a second supporting block (24), a connecting plate (21) and a lifting plate (23), wherein the first supporting block (22) and the second supporting block (24) are of a C-shaped structure, the first supporting block (22) and the second supporting block (24) are vertically arranged, the first supporting block (22) and the second supporting block (24) are connected with different first lugs (2) on a polytetrafluoroethylene plate body (1), the right end of the first supporting block (22) is fixedly connected with the left end of the second supporting block (24) through the connecting plate (21), the connecting plate (21) is obliquely arranged, two limiting grooves (2101) are symmetrically arranged on the left side and the right side of the connecting plate (21), a threaded hole (2102) is formed in the middle of the connecting plate (21), the two limiting grooves (2101) are slidably connected with the lifting block (25), and the lifting block (25) is symmetrically arranged on the left side and the right side of the lower end of the lifting plate (23), the left side and the right side of the lifting plate (23) are fixedly connected with compression plates (2301), and the compression plates (2301) are respectively attached to the inner walls of one sides of the first supporting block (22) and the second supporting block (24).

4. A method for manufacturing a polytetrafluoroethylene board according to any one of claims 1 to 3, wherein the method for manufacturing the polytetrafluoroethylene board body (1) comprises the steps of:

and 5: evenly cut about connecting the face of the polytetrafluoroethylene plate body (1) after the shaping, will polytetrafluoroethylene plate body (1) cutting is unsmooth form, obtains lug (2) and lug two (3), along being on a parallel with the direction of polytetrafluoroethylene plate body (1) upper surface is right lug (2) and lug two (3) are drilled, obtain through-hole (4).