Extrusion molding equipment and molding method for producing polytetrafluoroethylene tubes

Abstract

The invention relates to the technical field of polyfluoro tube production, and discloses an extrusion molding device and a molding method for polyfluoro tube production, comprising a bottom plate and a polyfluoro tube body, wherein an extrusion assembly is installed on the bottom plate, a heating cylinder is installed above the extrusion assembly, a guide tube is fixedly connected to the bottom of the heating cylinder, and the guide tube is connected to the extrusion assembly to introduce heated raw materials into the extrusion assembly, and a mixing assembly and a scraper assembly for cleaning the inner wall of the guide tube are arranged inside the heating cylinder. The invention not only stirs the raw materials in the heating cylinder by rotating a material stirrer to prevent the raw materials from agglomerating and affecting the quality of the polyfluoro tube body extrusion, but also scrapes the raw materials adhered to the inner wall of the guide tube by a scraper to prevent the guide tube from being blocked and affecting the feeding effect, and can also wipe and absorb water droplets on the polyfluoro tube body by a cotton cloth sleeve to remove the water droplets, so as to avoid the polyfluoro tube body being wet and affecting its quality when rolled up later.

Description

Technical Field

[0001] The invention relates to the field of polytetrafluoroethylene tube production, in particular to extrusion molding equipment and a molding method for polytetrafluoroethylene tube production. Background Art

[0002] PTFE tube, scientific name polytetrafluoroethylene tube, polytetrafluoroethylene has excellent chemical stability, corrosion resistance, high lubricity and non-stickiness and good anti-aging ability. The polytetrafluoroethylene tubes, rods, strips, films, etc. made of it are widely used in machinery, chemical industry, aviation, electrical and electronic, national defense industry, cutting-edge technology, medical and health care, and electrical insulation. In the production of PTFE tubes, in order to obtain PTFE tubes of different colors, masterbatches are generally added to the raw materials, mixed with the raw materials and the masterbatches, and then heated and finally extruded by an extruder. However, there are still the following problems in the production process of PTFE tubes:

[0003] 1. The raw materials will agglomerate during the heating process, and the agglomerates are easy to carbonize, which will affect the quality of the extruded PTFE tube when it flows into the extruder;

[0004] 2. When the raw materials and masterbatch are introduced into the extruder through the guide tube after heating, the heated raw materials will adhere to the inner wall of the guide tube, causing the guide tube to be blocked, resulting in unsmooth material feeding and affecting the efficiency of material feeding;

[0005] 3. The surface of the PTFE tube extruded by the extruder usually has a high temperature. Generally, the PTFE tube is passed into the cooling water for cooling. Then, since the cooling water is generally stored in the cooling pool, the cooling water does not flow, and the heat exchange effect is not ideal, which affects the cooling effect of the PTFE tube.

[0006] 4. After the PTFE tube is cooled by cooling water, water droplets will adhere to its surface. If it is not wiped off, the PTFE tube will become damp when it is rolled up later, which will also affect its quality.

[0007] Therefore, those skilled in the art provide an extrusion molding device and a molding method for producing polytetrafluoroethylene tubes to solve the problems raised in the above background technology. Summary of the invention

[0008] Technical issues solved

[0009] In view of the shortcomings of the prior art, the present invention provides an extrusion molding device and a molding method for the production of polyfluoro tubes, which are mainly used to solve the problems that in the production process of polyfluoro tubes, the raw materials are prone to agglomeration and carbonization during the early heating process of extrusion, and the material guide pipe is blocked when the heated raw materials are introduced into the extruder, and the cooling effect of the polyfluoro tube after extrusion is not ideal.

[0010] Technical Solution

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A polyfluoro tube production extrusion molding equipment comprises a bottom plate and a polyfluoro tube body, an extrusion assembly is installed on the bottom plate, a heating cylinder is installed above the extrusion assembly, a guide tube is fixedly connected to the bottom of the heating cylinder, and the guide tube is connected to the extrusion assembly for introducing the heated raw materials into the extrusion assembly, a mixing assembly and a scraping assembly for cleaning the inner wall of the guide tube are arranged inside the heating cylinder, a water tank is installed on the bottom plate, a cooling box is installed on the water tank, and the cooling box corresponds to the extrusion assembly, a water absorption assembly is arranged on the cooling box for extracting cooling water in the water tank into the cooling box, a surging assembly is arranged in the cooling box for allowing cooling water to flow in the cooling box, and a wiping assembly is arranged on the outer wall of the cooling box for wiping water droplets on the surface of the polyfluoro tube body cooled by cooling water.

[0013] Furthermore, the extrusion assembly includes an extrusion cylinder, a spiral roller, and an extrusion die. The extrusion cylinder is installed on a base plate, the bottom end of the guide tube is connected to the extrusion cylinder, the spiral roller is movably connected to the inside of the extrusion cylinder, the extrusion die is installed at the end of the extrusion cylinder, one end of the spiral roller is fixedly connected to a transmission shaft, one end of the base plate is installed with a mounting plate, one side of the mounting plate is fixedly connected to a first motor, and one end of the output shaft of the first motor is fixed to the transmission shaft, and the polytetrafluoroethylene tube body passes through the extrusion die and then passes through the cooling box.

[0014] On the basis of the above scheme, the mixing assembly includes two material shifting racks, the inner walls on both sides of the heating cylinder are fixedly connected with mounting strips, a sleeve is movably connected between the two mounting strips, both sides of the sleeve are fixedly connected with material shifting racks, a plurality of material shifting rods are installed on the material shifting racks, and the heating cylinder is provided with a driving assembly for rotating the sleeve.

[0015] As a further solution of the present invention, the driving assembly includes a sliding rod, a spiral groove, and a ball. The sliding rod is movably connected to the heating tube. The circumferential outer wall of the sliding rod is provided with a spiral groove. Two balls are installed inside the ring, and the balls are respectively inside the spiral grooves and movably connected thereto. The heating tube is provided with a lifting assembly for moving the sliding rod up and down.

[0016] Furthermore, the lifting assembly is a first cam, the top outer wall of the heating cylinder is fixedly connected with a mounting block, the mounting block is movably connected with a rotating shaft, the first cam is fixedly connected to the circumferential outer wall of the rotating shaft, the first cam is in contact with the top of the sliding rod, the circumferential outer wall of the sliding rod is movably connected with a first spring, and the two ends of the first spring are respectively fixed to the sliding rod and the heating cylinder, the circumferential outer wall of the transmission shaft is fixedly connected with a first pulley, the circumferential outer wall of the rotating shaft is fixedly connected with a second pulley, and the first pulley and the second pulley are connected by a belt.

[0017] On the basis of the above-mentioned scheme, the scraper assembly is a scraper blade, which is installed at the bottom end of the slide rod, and the scraper blade can extend into the material guide tube and fit with the inner wall of the material guide tube.

[0018] As a further solution of the present invention, the water absorption assembly includes a water pump, a water absorption pipe, and a connecting pipe. The water pump is installed on one side outer wall of the cooling box, the water absorption pipe is fixedly connected to the water inlet of the water pump, the connecting pipe is fixedly connected to the water outlet of the water pump, one end of the connecting pipe is fixedly connected to a water spray pipe, and the water spray pipe extends into the cooling box and is located above the polytetrafluoroethylene tube body.

[0019] Furthermore, the tumbling assembly includes multiple toggle rods, multiple round rods are movably connected inside the cooling box, and multiple toggle rods are installed on the circumferential outer walls of the round rods in turn, both ends of the multiple round rods are fixedly connected with gears, the inner walls on both sides of the cooling box are movably connected with racks, and the racks are meshed with the gears, one side of the cooling box is movably connected with two sliding frames, and the sliding frames are respectively fixed to one end of the racks, connecting plates are installed on both sides of the outer wall of one end of the cooling box, a transmission rod is movably connected between the two connecting plates, the circumferential outer walls of the transmission rod near both ends are fixedly connected with second cams, and the second cams are respectively in contact with the sliding frames, two second springs are fixedly connected to the inner wall of one side of the cooling box, and one end of the second spring is fixed to the sliding frame, one side of one of the connecting plates is fixedly connected to a second motor, and one end of the output shaft of the second motor is fixed to the transmission rod.

[0020] On the basis of the above-mentioned scheme, the wiping assembly includes multiple cotton cloth covers, one side of the two connecting plates is movably connected to a sliding seat, one end of the sliding seat is vertically movably connected to a vertical plate, the vertical plates are sequentially installed with cotton cloth covers from top to bottom, and the two cotton cloth covers located at the same horizontal position wrap and fit the polytetrafluoroethylene tube body, one side of the two sliding seats is installed with a contact block, and the contact block is in contact with the second cam, one side of the two sliding seats is fixedly connected with a third spring, and one end of the third spring is fixed to the connecting plate, the circumferential outer wall of the transmission rod is tied with multiple spring ropes, one end of the spring rope is installed with a rubber ball, and the rubber ball is in contact with the outer wall of the polytetrafluoroethylene tube body.

[0021] A processing method for an extrusion molding device for producing a polytetrafluoroethylene tube comprises the following steps:

[0022] S1: Pour the raw materials into the heating cylinder for preheating. During the heating process, the raw materials are mixed by the mixing component to avoid agglomeration of the raw materials during the heating process. The heated raw materials flow from the guide tube into the extrusion cylinder. At the same time, the scraper component is controlled to move up and down to scrape off the raw materials adhering to the inner wall of the guide tube;

[0023] S2: After the raw materials flow into the extrusion cylinder, the raw materials are extruded through the extrusion assembly to form a PTFE tube body. The produced PTFE tube body passes through a cooling box, and the water absorption assembly is started. The water absorption assembly draws water from the water tank and sprays it on the surface of the PTFE tube body to cool it down.

[0024] S3: Start the surging component, which surgingly surging the cold zone water in the cooling box, so that the cooling water flows in the cooling box to improve the heat exchange effect of the cooling water;

[0025] S4: After being cooled, the PTFE tube body passes through the other end of the cooling box, and the wiping assembly is started to wipe off the water drops on the surface of the PTFE tube body.

[0026] Beneficial Effects

[0027] Compared with the prior art, the present invention provides an extrusion molding device and molding method for producing polytetrafluoroethylene tubes, which have the following beneficial effects:

[0028] 1. The present invention arranges a mixing component and a scraping component. The sliding rod moves up and down under the action of the spiral groove and the ball. The material-scraping frame follows the rotation to stir the raw materials in the heating cylinder to prevent the raw materials from agglomerating and affecting the quality of the extrusion of the PTFE tube body. At the same time, the scraper scrapes off the raw materials adhering to the inner wall of the guide tube to prevent the guide tube from being blocked and affecting the feeding effect. The mixing and scraping are carried out simultaneously to improve the efficiency.

[0029] 2. The present invention stirs the cooling water in the cooling box by reciprocatingly rotating the toggle rod, so that the cooling water keeps surging and flowing, thereby accelerating the heat exchange effect of the cooling water and improving the overall cooling effect.

[0030] 3. The present invention controls the reciprocating movement of the cotton cloth sleeve to wipe and absorb the water droplets on the PTFE tube body through the setting of the wiping component, so as to remove the water droplets and avoid the PTFE tube body being wet when rolled up later and affecting its quality.

[0031] 4. The present invention can reduce manual operations in the mixing, scraping, tumbling and wiping stages through the arrangement of the first cam, the second cam, the gear, the rack and other structures, saving time and effort, and the overall integration and automation of the equipment is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the front side three-dimensional structure of an extrusion molding device for producing polytetrafluoroethylene tubes proposed by the present invention;

[0033] Figure 2 This is a schematic diagram of the rear three-dimensional structure of an extrusion molding device for producing polytetrafluoroethylene tubes proposed by the present invention;

[0034] Figure 3 A schematic cross-sectional view of a heating cylinder of an extrusion molding device for producing a polytetrafluoroethylene tube according to the present invention;

[0035] Figure 4 A schematic diagram of a mixing component of an extrusion molding device for producing a polytetrafluoroethylene tube proposed by the present invention;

[0036] Figure 5 A cross-sectional schematic diagram of a cooling box of an extrusion molding device for producing a polytetrafluoroethylene tube according to the present invention;

[0037] Figure 6 A schematic diagram of a wiping component of an extrusion molding device for producing polytetrafluoroethylene tubes proposed by the present invention.

[0038] In the figure: 1, bottom plate; 2, extrusion cylinder; 3, extrusion die; 4, water tank; 5, cooling box; 6, mounting plate; 7, first motor; 8, heating cylinder; 9, water pump; 10, water suction pipe; 11, connecting pipe; 12, water spray pipe; 13, PTFE tube body; 14, wiping assembly; 15, spiral roller; 16, first pulley; 17, transmission shaft; 18, mounting strip; 19, mounting block; 20, second pulley; 21, rotating shaft; 22, first cam; 23, first spring; 24, slide rod; 25 , mixing assembly; 26, collar; 27, ball; 28, material shifting rack; 29, spiral groove; 30, second motor; 31, second spring; 32, rack; 33, round rod; 34, gear; 35, tumbling assembly; 36, toggle rod; 37, sliding rack; 38, connecting plate; 39, third spring; 40, sliding seat; 41, contact block; 42, spring rope; 43, rubber ball; 44, transmission rod; 45, second cam; 46, material guide tube; 47, cotton cloth cover; 48, vertical plate; 49, scraper. DETAILED DESCRIPTION

[0039] 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.

[0040] Reference Figure 1-Figure 6, an extrusion molding equipment for producing polyfluoro tubes, including a bottom plate 1 and a polyfluoro tube body 13, an extrusion assembly is installed on the bottom plate 1, a heating cylinder 8 is installed above the extrusion assembly, the raw material is heated by the heating cylinder 8, the bottom of the heating cylinder 8 is fixedly connected with a guide pipe 46, and the guide pipe 46 is connected to the extrusion assembly to introduce the heated raw material into the extrusion assembly, the interior of the heating cylinder 8 is provided with a mixing assembly 25 and a scraping assembly for cleaning the inner wall of the guide pipe 46, a water tank 4 is installed on the bottom plate 1, a cooling box 5 is installed on the water tank 4, and the cooling box 5 corresponds to the extrusion assembly, a water absorption assembly is provided on the cooling box 5 to extract the cooling water in the water tank 4 into the cooling box 5, a surging assembly 35 is provided in the cooling box 5 to make the cooling water flow in the cooling box 5, and a wiping assembly 14 is provided on the outer wall of the cooling box 5 to wipe the water droplets on the surface of the polyfluoro tube body 13 cooled by the cooling water.

[0041] In the present invention, the extrusion assembly includes an extrusion cylinder 2, a spiral roller 15, and an extrusion die 3. The extrusion cylinder 2 is installed on the base plate 1, the bottom end of the guide tube 46 is connected to the extrusion cylinder 2, the spiral roller 15 is rotatably connected to the inside of the extrusion cylinder 2, the extrusion die 3 is installed at the end of the extrusion cylinder 2, one end of the spiral roller 15 is keyed to a transmission shaft 17, one end of the base plate 1 is installed with a mounting plate 6, one side of the mounting plate 6 is fixed with a first motor 7 by bolts, and one end of the output shaft of the first motor 7 is fixed with the transmission shaft 17, the polytetrafluoroethylene tube body 13 passes through the extrusion die 3, and then passes through the cooling box 5, the first motor 7 rotates to drive the transmission shaft 17 to rotate, the heated raw material enters the extrusion cylinder 2 from the guide tube 46, the transmission shaft 17 rotates to drive the spiral roller 15 to rotate, and then under the action of the extrusion die 3, the raw material is extruded from the extrusion die 3 on the extrusion cylinder 2 to form the polytetrafluoroethylene tube body 13.

[0042] In the present invention, the mixing assembly 25 includes two material shifting racks 28, the inner walls of both sides of the heating cylinder 8 are fixed with mounting strips 18 by bolts, a collar 26 is rotatably connected between the two mounting strips 18, both sides of the collar 26 are fixed with material shifting racks 28 by bolts, a plurality of material shifting rods are installed on the material shifting racks 28, and a driving assembly for rotating the collar 26 is provided on the heating cylinder 8, the driving assembly includes a slide bar 24, a spiral groove 29, and a ball 27, the slide bar 24 penetrates and is slidably connected to the heating cylinder 8, The outer circumferential wall of the slide bar 24 is provided with a spiral groove 29, and two balls 27 are installed inside the collar 26, and the balls 27 are respectively inside the spiral groove 29 and are slidably connected thereto. A lifting component for moving the slide bar 24 up and down is provided on the heating cylinder 8, and the lifting component is a first cam 22. A mounting block 19 is fixed to the top outer wall of the heating cylinder 8 by bolts, and a rotating shaft 21 is slidably connected to the mounting block 19. The first cam 22 is key-connected to the outer circumferential wall of the rotating shaft 21. The first cam The first spring 23 is sleeved on the outer circumferential wall of the slide bar 24, and the two ends of the first spring 23 are respectively fixed to the slide bar 24 and the heating tube 8. The outer circumferential wall key of the transmission shaft 17 is connected to the first pulley 16, and the outer circumferential wall key of the rotating shaft 21 is connected to the second pulley 20, and the first pulley 16 and the second pulley 20 are connected by a belt. The transmission shaft 17 drives the first pulley 16 to rotate, and the first pulley 16 rotates to drive the second pulley 20 to rotate through the belt. , and then the rotating shaft 21 drives the first cam 22 to rotate, and the rotation of the first cam 22 reciprocates the sliding rod 24, and then under the action of the first spring 23, the sliding rod 24 moves up and down along the heating cylinder 8, and the up and down movement of the sliding rod 24 causes the spiral groove 29 to move up and down. At this time, the ball 27 in the collar 26 moves along the spiral groove 29, and then the collar 26 reciprocates on the two mounting bars 18, and the material shifting rack 28 follows the rotation to shift the raw materials in the heating cylinder 8 to prevent the raw materials from agglomerating.

[0043] In the present invention, the scraper assembly is a scraper 49, which is installed at the bottom end of the slide bar 24, and the scraper 49 can extend into the guide tube 46 and fit against the inner wall of the guide tube 46. The slide bar 24 moves up and down to make the scraper 49 move up and down. The scraper 49 enters the guide tube 46 during the downward movement, scrapes off the raw material adhering to the inner wall of the guide tube 46 and drops it into the extrusion cylinder 2 to prevent the guide tube 46 from being blocked.

[0044] In the present invention, the water suction component includes a water pump 9, a water suction pipe 10, and a connecting pipe 11. The water pump 9 is installed on one side outer wall of the cooling box 5. The water suction pipe 10 is fixedly connected to the water inlet of the water pump 9. The connecting pipe 11 is fixedly connected to the water outlet of the water pump 9. One end of the connecting pipe 11 is fixedly connected to a water spray pipe 12, and the water spray pipe 12 extends into the cooling box 5 and is located above the polytetrafluoroethylene tube body 13. When the water pump 9 is started, the water pump 9 works to extract cooling water from the water tank 4 through the water suction pipe 10. The cooling water flows into the water spray pipe 12 through the connecting pipe 11, and then is sprayed out from multiple nozzles on the water spray pipe 12. The cooling water is sprayed on the surface of the polytetrafluoroethylene tube body 13 to achieve cooling.

[0045] In the present invention, the tumbling assembly 35 includes a plurality of toggle rods 36, a plurality of round rods 33 are rotatably connected inside the cooling box 5, a plurality of toggle rods 36 are sequentially installed on the circumferential outer walls of the round rods 33, both ends of the plurality of round rods 33 are keyed to gears 34, the inner walls on both sides of the cooling box 5 are slidably connected to racks 32, and the racks 32 are meshed with the gears 34, one side of the cooling box 5 is slidably connected to two sliding frames 37, and the sliding frames 37 are respectively fixed to one end of the racks 32, a connecting plate 38 is installed on both sides of the outer wall of one end of the cooling box 5, a transmission rod 44 is rotatably connected between the two connecting plates 38, the circumferential outer walls of the transmission rod 44 near both ends are keyed to second cams 45, and the second cams 45 are respectively in contact with the sliding frames 37, and the inner wall of one side of the cooling box 5 is welded with There are two second springs 31, and one end of the second spring 31 is fixed to the sliding frame 37. One side of one connecting plate 38 is fixed with a second motor 30 by bolts, and one end of the output shaft of the second motor 30 is fixed to the transmission rod 44. The rotation of the second motor 30 drives the transmission rod 44 to rotate, and the rotation of the transmission rod 44 drives the second cams 45 at both ends to rotate. At this time, the second cam 45 rotates to cyclically squeeze the sliding frame 37, and then under the action of the second spring 31, the sliding frame 37 drives the rack 32 to move back and forth, and the reciprocating movement of the rack 32 causes the gear 34 to rotate back and forth, thereby causing the multiple round rods 33 to respectively drive the multiple toggle rods 36 to rotate, and the reciprocating rotation of the toggle rods 36 to toggle the cooling water in the cooling box 5, so that the cooling water keeps surging to accelerate the heat exchange effect of the cooling water.

[0046] In the present invention, the wiping assembly 14 includes a plurality of cotton sleeves 47, one side of the two connecting plates 38 is slidably connected to a slide seat 40, one end of the slide seat 40 is vertically slidably connected to a vertical plate 48, the vertical plates 48 are sequentially installed with cotton sleeves 47 from top to bottom, and the two cotton sleeves 47 located at the same horizontal position wrap and fit the polytetrafluoroethylene tube body 13, one side of the two slide seats 40 is installed with a contact block 41, and the contact block 41 is in contact with the second cam 45, one side of the two slide seats 40 is welded with a third spring 39, and one end of the third spring 39 is fixed to the connecting plate 38, and the second cam 45 cyclically squeezes the contact block 41 during the reciprocating rotation process, and under the action of the third spring 39, the slide seat 40 reciprocates along the connecting plate 38, thereby causing the two vertical plates 48 drives the cotton sleeve 47 to move, and the cotton sleeve 47 moves to wipe and absorb the water drops on the PTFE tube body 13 to remove the water drops. When the water absorbed by the cotton sleeve 47 is saturated, the vertical plate 48 can be moved downward to replace another cotton sleeve 47 to continue to absorb the PTFE tube body 13. The circumferential outer wall of the transmission rod 44 is fastened with a plurality of spring ropes 42, and a rubber ball 43 is installed at one end of the spring rope 42, and the rubber ball 43 is in contact with the outer wall of the PTFE tube body 13. During the rotation of the transmission rod 44, the plurality of spring ropes 42 are driven to rotate, and the rotation of the spring rope 42 generates centrifugal force to cause it to stretch. The rubber ball 43 cyclically knocks on the PTFE tube body 13, which can shake off the water drops adhering to the surface of the PTFE tube body 13, thereby improving the removal effect of the water drops.

[0047] A molding method of an extrusion molding device for producing a polytetrafluoroethylene tube comprises the following steps:

[0048] S1: Pour the raw materials into the heating cylinder 8 for preheating. During the heating process, the raw materials are mixed by the mixing component 25 to prevent the raw materials from agglomerating during the heating process. The heated raw materials flow from the guide tube 46 into the extrusion cylinder 2. At the same time, the scraper component is controlled to move up and down to scrape off the raw materials adhering to the inner wall of the guide tube 46;

[0049] S2: After the raw material flows into the extrusion cylinder 2, the raw material is extruded through the extrusion assembly to form the PTFE tube body 13. The produced PTFE tube body 13 passes through the cooling box 5, and the water absorption assembly is started. The water absorption assembly draws water from the water tank 4 and sprays it on the surface of the PTFE tube body 13 to cool it down.

[0050] S3: starting the surging component 35, the surging component 35 works to surging the cold zone water in the cooling box 5, so that the cooling water flows in the cooling box 5, so as to improve the heat exchange effect of the cooling water;

[0051] S4: After being cooled, the PTFE tube body 13 passes through the other end of the cooling box 5, and the wiping assembly 14 is started to wipe away the water drops on the surface of the PTFE tube body 13.

[0052] Working principle: Pour the raw material into the heating cylinder 8, heat the raw material through the heating cylinder 8, start the first motor 7, the first motor 7 rotates to make the transmission shaft 17 drive the first pulley 16 to rotate, the first pulley 16 rotates through the belt to drive the second pulley 20 to rotate, and then the rotating shaft 21 drives the first cam 22 to rotate, and the first cam 22 rotates to reciprocate and squeeze the slide bar 24, and then under the action of the first spring 23, the slide bar 24 moves up and down along the heating cylinder 8, and the up and down movement of the slide bar 24 makes the spiral groove 29 move up and down. At this time, the ball 27 in the collar 26 moves along the spiral groove 29, and then the collar 26 reciprocates along the two mounting strips 18. The material shifting frame 28 follows the rotation to shift the raw material in the heating cylinder 8 to prevent the raw material from agglomerating, and the up and down movement of the slide bar 24 makes the scraper 49 move up and down. The scraper 49 enters the guide tube 46 during the downward movement, scrapes the raw material adhering to the inner wall of the guide tube 46 and drops it into the extrusion cylinder 2 to prevent the guide tube 46 from being blocked;

[0053] After the raw material enters the extrusion cylinder 2 from the guide pipe 46, the spiral roller 15 is driven to rotate during the rotation of the transmission shaft 17, and then the raw material is extruded from the extrusion die 3 on the extrusion cylinder 2 under the action of the extrusion die 3 to form the PTFE tube body 13;

[0054] The produced PTFE tube body 13 is inserted from one end of the cooling box 5 and is passed out from the other end of the cooling box 5. A certain amount of cooling water is injected into the cooling box 5, and the cooling water covers the PTFE tube body 13. The water pump 9 is started, and the water pump 9 works to extract the cooling water in the water tank 4 through the suction pipe 10. The cooling water flows into the water spray pipe 12 through the connecting pipe 11, and then sprays out from multiple nozzles on the water spray pipe 12. The cooling water is sprayed on the surface of the PTFE tube body 13 to achieve cooling. As the cooling water in the cooling box 5 is injected too much, the excess cooling water flows back to the water tank 4 through the drainage holes on both sides of the cooling box 5, so as to realize the circulation of cooling water;

[0055] After the cooled PTFE tube body 13 passes through one end of the cooling box 5, it passes between the two cotton sleeves 47, and the cotton sleeve 47 is tightly fitted with the PTFE tube body 13. The second motor 30 is started, and the second motor 30 rotates to drive the transmission rod 44 to rotate. The transmission rod 44 rotates to drive the second cams 45 at both ends to rotate. At this time, the second cam 45 rotates to cyclically squeeze the sliding frame 37, and then under the action of the second spring 31, the sliding frame 37 drives the rack 32 to move back and forth, and the reciprocating movement of the rack 32 causes the gear 34 to reciprocate, thereby causing the multiple round rods 33 to respectively drive the multiple toggle rods 36 to rotate. The reciprocating rotation of the toggle rods 36 to toggle the cooling water in the cooling box 5, so that the cooling water keeps surging, so as to accelerate the heat exchange effect of the cooling water;

[0056] During the reciprocating rotation of the second cam 45, the contact block 41 is cyclically squeezed. Under the action of the third spring 39, the slide seat 40 reciprocates along the connecting plate 38, so that the two vertical plates 48 drive the cotton sleeve 47 to move. The cotton sleeve 47 reciprocates to wipe and absorb the water drops on the polytetrafluoroethylene tube body 13 to remove the water drops. When the water absorbed by the cotton sleeve 47 is saturated, the vertical plate 48 can be moved downward to replace another cotton sleeve 47 to continue to absorb the polytetrafluoroethylene tube body 13. During the rotation of the transmission rod 44, multiple spring ropes 42 are driven to rotate. The rotation of the spring rope 42 generates centrifugal force to cause it to stretch. The rubber ball 43 cyclically knocks on the polytetrafluoroethylene tube body 13, which can shake off the water drops adhering to the surface of the polytetrafluoroethylene tube body 13, thereby improving the removal effect of the water drops.

[0057] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0058] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion molding device for producing polytetrafluoroethylene tubes, comprising a base plate (1) and a polytetrafluoroethylene tube body (13), characterized in that: An extrusion assembly is mounted on the bottom plate (1), a heating cylinder (8) is mounted above the extrusion assembly, a guide tube (46) is fixedly connected to the bottom of the heating cylinder (8), and the guide tube (46) is connected to the extrusion assembly for introducing the heated raw material into the extrusion assembly, a mixing assembly (25) and a scraping assembly for cleaning the inner wall of the guide tube (46) are arranged inside the heating cylinder (8), a water tank (4) is mounted on the bottom plate (1), a cooling box (5) is mounted on the water tank (4), and the cooling box (5) corresponds to the extrusion assembly, a water absorption assembly is arranged on the cooling box (5) for extracting cooling water in the water tank (4) into the cooling box (5), a tumbling assembly (35) is arranged inside the cooling box (5) for allowing cooling water to flow in the cooling box (5), and a wiping assembly (14) is arranged on the outer wall of the cooling box (5) for wiping water droplets on the surface of the polytetrafluoroethylene tube body (13) cooled by the cooling water; The mixing assembly (25) comprises two material shifting racks (28), the inner walls of both sides of the heating cylinder (8) are fixedly connected with mounting strips (18), a sleeve (26) is movably connected between the two mounting strips (18), both sides of the sleeve (26) are fixedly connected with material shifting racks (28), a plurality of material shifting rods are installed on the material shifting racks (28), and a driving assembly for rotating the sleeve (26) is provided on the heating cylinder (8); The driving assembly comprises a slide bar (24), a spiral groove (29), and a ball (27); the slide bar (24) is movably connected to the heating tube (8); a spiral groove (29) is provided on the circumferential outer wall of the slide bar (24); two balls (27) are installed inside the sleeve ring (26); the balls (27) are respectively inside the spiral grooves (29) and are movably connected thereto; and a lifting assembly for moving the slide bar (24) up and down is provided on the heating tube (8); The tumbling assembly (35) comprises a plurality of toggle rods (36), the interior of the cooling box (5) is movably connected to a plurality of round rods (33), the circumferential outer walls of the round rods (33) are sequentially mounted with a plurality of toggle rods (36), both ends of the plurality of round rods (33) are fixedly connected to gears (34), the inner walls of both sides of the cooling box (5) are movably connected to racks (32), and the racks (32) are meshed with the gears (34), one side of the cooling box (5) is movably connected to two sliding frames (37), and the sliding frames (37) are respectively fixed to one end of the racks (32), and one end of the cooling box (5) Connecting plates (38) are installed on both sides of the outer wall, a transmission rod (44) is movably connected between the two connecting plates (38), and the circumferential outer walls of the transmission rod (44) near both ends are fixedly connected to second cams (45), and the second cams (45) are respectively in contact with the sliding frame (37); two second springs (31) are fixedly connected to the inner wall of one side of the cooling box (5), and one end of the second spring (31) is fixed to the sliding frame (37); one side of one of the connecting plates (38) is fixedly connected to a second motor (30), and one end of the output shaft of the second motor (30) is fixed to the transmission rod (44); The wiping assembly (14) comprises a plurality of cotton sleeves (47), one side of the two connecting plates (38) is movably connected to a slide seat (40), one end of the slide seat (40) is vertically movably connected to a vertical plate (48), the vertical plate (48) is sequentially installed with cotton sleeves (47) from top to bottom, and the two cotton sleeves (47) located at the same horizontal position wrap and fit the polytetrafluoroethylene tube body (13), one side of the two sliding seats (40) is installed with a contact block (41), and the contact block (41) is in contact with the second cam (45), one side of the two sliding seats (40) is fixedly connected to a third spring (39), and one end of the third spring (39) is fixed to the connecting plate (38), and the circumferential outer wall of the transmission rod (44) is fastened with a plurality of spring ropes (42), one end of the spring rope (42) is installed with a rubber ball (43), and the rubber ball (43) is in contact with the outer wall of the polytetrafluoroethylene tube body (13).

2. The extrusion molding equipment for producing polytetrafluoroethylene tubes according to claim 1, characterized in that: The extrusion assembly comprises an extrusion cylinder (2), a spiral roller (15), and an extrusion die (3); the extrusion cylinder (2) is mounted on a bottom plate (1); the bottom end of the guide tube (46) is connected to the extrusion cylinder (2); the spiral roller (15) is movably connected to the inside of the extrusion cylinder (2); the extrusion die (3) is mounted at the end of the extrusion cylinder (2); one end of the spiral roller (15) is fixedly connected to a transmission shaft (17); one end of the bottom plate (1) is mounted with a mounting plate (6); one side of the mounting plate (6) is fixedly connected to a first motor (7); and one end of the output shaft of the first motor (7) is fixed to the transmission shaft (17); the polytetrafluoroethylene tube body (13) passes through the extrusion die (3) and then passes through the cooling box (5).

3. The extrusion molding equipment for producing polytetrafluoroethylene tubes according to claim 2, characterized in that: The lifting component is a first cam (22); the top outer wall of the heating cylinder (8) is fixedly connected to a mounting block (19); a rotating shaft (21) is movably connected to the mounting block (19); the first cam (22) is fixedly connected to the circumferential outer wall of the rotating shaft (21); the first cam (22) is in contact with the top end of a sliding rod (24); the circumferential outer wall of the sliding rod (24) is movably connected to a first spring (23); and the two ends of the first spring (23) are respectively fixed to the sliding rod (24) and the heating cylinder (8); the circumferential outer wall of the transmission shaft (17) is fixedly connected to a first pulley (16); the circumferential outer wall of the rotating shaft (21) is fixedly connected to a second pulley (20); and the first pulley (16) and the second pulley (20) are connected by a belt.

4. The extrusion molding equipment for producing polytetrafluoroethylene tubes according to claim 3, characterized in that: The scraper assembly is a scraper blade (49), which is mounted on the bottom end of the slide bar (24). The scraper blade (49) can extend into the material guide tube (46) and fit into the inner wall of the material guide tube (46).

5. The extrusion molding equipment for producing polytetrafluoroethylene tubes according to claim 4, characterized in that: The water suction assembly comprises a water pump (9), a water suction pipe (10), and a connecting pipe (11); the water pump (9) is mounted on an outer wall of one side of the cooling box (5); the water suction pipe (10) is fixedly connected to a water inlet of the water pump (9); the connecting pipe (11) is fixedly connected to a water outlet of the water pump (9); one end of the connecting pipe (11) is fixedly connected to a water spray pipe (12); the water spray pipe (12) extends into the cooling box (5) and is located above the polytetrafluoroethylene tube body (13).

6. A molding method for an extrusion molding device for producing a polytetrafluoroethylene tube according to claim 5, characterized in that: It includes the following steps: S1: pouring the raw materials into the heating cylinder (8) for preheating, mixing the raw materials through the mixing component (25) during the heating process to prevent the raw materials from agglomerating during the heating process, and the heated raw materials flow from the guide tube (46) into the extrusion cylinder (2), while controlling the scraper component to move up and down to scrape off the raw materials adhering to the inner wall of the guide tube (46); S2: After the raw material flows into the extrusion cylinder (2), the raw material is extruded through the extrusion assembly to form a polyfluoro tube body (13). The produced polyfluoro tube body (13) passes through a cooling box (5), and the water absorption assembly is started. The water absorption assembly draws water from the water tank (4) and sprays it on the surface of the polyfluoro tube body (13) to cool it down. S3: starting the surging component (35), the surging component (35) works to surging the cold zone water in the cooling box (5), so that the cooling water flows in the cooling box (5), thereby improving the heat exchange effect of the cooling water; S4: After being cooled, the polytetrafluoroethylene tube body (13) passes through the other end of the cooling box (5), and the wiping assembly (14) is started to wipe away the water drops on the surface of the polytetrafluoroethylene tube body (13).

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