A material extruder for processing thermoplastic polyurethane inner tubes

Abstract

The present invention discloses a material extruder for processing thermoplastic polyurethane inner tubes, and the present invention relates to the technical field of material extruders, comprising a bottom plate: a barrel, which is used to extrude thermoplastic polyurethane materials, and the barrel has a feeding hopper for mixing and introducing thermoplastic polyurethane materials, and a waste hopper fixedly installed on the barrel, the waste hopper is used to export the material residue of the barrel, and the waste hopper is installed directly below the feeding hopper through the barrel, and the feeding hopper is fixedly connected to the barrel. The material extruder for processing thermoplastic polyurethane inner tubes can simultaneously insulate and collect heat on both sides of the extrusion head from the inside to the outside, prevent the heat loss inside the extrusion head, ensure that the temperature inside the extrusion head will not affect the extrusion operation of the thermoplastic polyurethane material, avoid the thermoplastic polyurethane material from solidifying in the extrusion head, and also prevent the thermoplastic polyurethane material from remaining inside the extrusion head.

Description

Technical Field

[0001] The invention relates to the technical field of material extruders, in particular to a material extruder for processing thermoplastic polyurethane inner tubes. Background Art

[0002] Thermoplastic polyurethane is a high-performance polymer material that is widely used in the medical, automotive, textile, footwear and other industries for its excellent wear resistance, tear resistance, chemical resistance and biocompatibility. The molecular structure of TPU gives it unique physical properties such as high strength, high elongation and good elasticity. As an important part of the tire, the performance of the inner tube directly affects the service life and safety of the tire. Traditional inner tube materials include butyl rubber and PVC, while thermoplastic polyurethane is considered to be an ideal material for the next generation of inner tubes due to its excellent performance. Existing extruder technology is mainly used for the molding of plastics and rubber. These devices make materials into the desired shape and size through processes such as heating, melting, extrusion and cooling. However, these devices have certain limitations when processing high-performance materials such as TPU: during the use of traditional extruders, the connection between the extruder head and the mold is often without any constant temperature measures, so that when the molten thermoplastic polyurethane material enters the mold from the extruder head, it often loses some heat, resulting in poor fluidity of the thermoplastic polyurethane material entering the mold. At the same time, it will also cause the thermoplastic polyurethane material flowing through the extruder head to have residues or wall hanging on its inner wall, and even bring hidden dangers of blockage inside the extruder head, which not only increases the workload of cleaning when the extruder head is subsequently shut down, but also under this structure of extrusion guidance for thermoplastic polyurethane material, the quality of the molded inner tube cannot be guaranteed. Summary of the invention

[0003] In order to solve the above technical problems, the present invention is implemented by the following technical solutions: a material extruder for processing thermoplastic polyurethane inner tubes, comprising a bottom plate:

[0004] A barrel, used for extruding a thermoplastic polyurethane material, the barrel having a feeding hopper for mixing and introducing the thermoplastic polyurethane material, and a waste hopper fixedly installed on the barrel, the waste hopper being used for exporting the material residue of the barrel, and the waste hopper being installed directly below the feeding hopper through the barrel, and the feeding hopper being fixedly connected to the barrel;

[0005] A reduction box is used to control the extrusion speed of the barrel. The reduction box has a motor that provides driving force, and a heater 1 installed on one side of the reduction box. A screw body is installed in the middle of the reduction box, and the screw body is rotatably installed with the barrel through the reduction box and the motor. A heater 2 is fixedly installed on the top side of the bottom plate, and a plurality of heating sleeves are connected to the output end of the heater 2. The heating sleeve is fitted with the barrel for heating the barrel, and an arched heat ring is installed in a circular ring shape inside the heating sleeve for collecting heat and concentrating the heat on the barrel;

[0006] Among them, the front end of the barrel is threadedly installed with an extrusion head, the surface of the extrusion head is wrapped in a circular ring and installed with a head cover, the inner side of the extrusion head is fitted with an inner bucket, the inner bucket is used to collect heat on the inner side of the extrusion head, a heat-conducting core is embedded in the head cover, the heat-conducting core is plugged into the output end of the heating sleeve, and a heat collecting ring is embedded in the middle of the inner side of the front end of the head cover, and the heat collecting ring is connected to the heating sleeve through the heat-conducting core.

[0007] Preferably, a long pin is installed in a centrally symmetrical shape at the threaded connection portion between the extrusion head and the barrel, and the long pin is installed with the head cover, the extrusion head and the inner bucket thread in sequence. A clamping rod is fixedly connected to the middle part of the inner side of the extrusion head, and a long head connecting rod is inserted in the middle part of the clamping rod. The long head connecting rod is rotatably connected to the front end of the screw body, and the long head connecting rod provides axial guidance for the rotation and extrusion of the screw body inside the barrel.

[0008] Preferably, an annular cavity is provided inside the extrusion head in a circumferential shape, and the annular cavity is used to collect heat inside the extrusion head, to form a protective layer around the inner bucket, and to store the heat dissipated from the inner bucket, and the annular cavity corresponds to the inner bucket and surrounds the inner bucket, and a hoop groove is provided on the inner side of the barrel and at one end away from the extrusion head.

[0009] Preferably, an inverted V-shaped plate is fixedly installed in the middle of the inner side of the feeding hopper, and the V-mouth of the inverted V-shaped plate points vertically to the barrel. A piston petal is installed in the middle of the inner side of the feeding hopper, and the number of the piston petals is a pair, and the pair of piston petals are hinged, and the opening direction of the pair of piston petals is vertically pointing to the barrel, wherein a pair of piston petals are fittedly installed on the bottom of the inverted V-shaped plate through the feeding hopper, and the inverted V-shaped plate is installed at the hinge in the middle of the pair of piston petals through the feeding hopper.

[0010] Preferably, a sealing ring is installed on the top side of the piston petal, and the sealing ring is installed around the inverted V-shaped plate. The sealing ring is embedded in the feeding hopper, and an annular compression spring is installed at the embedded position of the sealing ring and the feeding hopper. The sealing ring is elastically installed with the feeding hopper through the annular compression spring, and the piston petal is sealed and fitted with the feeding hopper through the cooperation of the sealing ring and the annular compression spring, and the feeding hopper is connected with the inside of the barrel through the piston petal.

[0011] Preferably, a solenoid valve is installed at the portion where the waste hopper is connected to the inside of the barrel, and the solenoid valve is used to guide the residual material inside the barrel to the waste hopper in a unidirectional manner.

[0012] Preferably, a heat collecting plug is mounted on the surface of the screw body and at one end close to the reduction gearbox, the heat collecting plug is made of rock wool material as a whole, and is installed in an engaging manner with the barrel, an extension rod is fixedly connected to one end of the screw body close to the reduction gearbox, and the extension rod is connected to the output end of the reduction gearbox through a coupling, a feeding part is installed on the surface of the screw body and at one end close to the reduction gearbox, a compression part is installed in the middle of the surface of the screw body, and a metering part is installed on the surface of the screw body and at one end away from the reduction gearbox, and the structural designs of these three sections are respectively used for spiral addition, spiral compression and metering control of thermoplastic polyurethane material, and the thread structure pitch of the feeding part, the thread structure pitch of the compression part, and the thread structure pitch of the metering part become smaller in sequence, and the pitches between the thread structures of the metering parts are the same.

[0013] Preferably, a pair of material control parts are installed between the feeding part and the compression part, a heating core is installed in the middle part of the inner side of the screw body, the heating core is connected to the output end of the heating body, an insulation plug is inserted into the end of the heating core close to the reduction gearbox, the heating core is sealed and engaged with the extension rod through the insulation plug, flat rings are symmetrically installed on both sides of the heating core, and the flat rings are made of phase change material as a whole, a rod frame is installed on the inner side of the flat ring in a centrally symmetrical shape, and the flat ring is mounted on the screw body through the rod frame.

[0014] Preferably, a trumpet bucket is embedded in the heat collecting plug, and the trumpet bucket is installed at equal intervals inside the heat collecting plug along the axis of the extension rod, a rotating shaft is installed at the end of the trumpet bucket away from the extension rod, and a heat collecting plate is embedded in the side of the rotating shaft away from the extension rod, and the trumpet mouth of the trumpet bucket points to the heat collecting plate. The heat collecting plug is used to collect and gather the excess heat generated by the heating core on the inner side of the screw body inside, and collect the heat on the heat collecting plate with the help of the trumpet bucket, and the thermoplastic polyurethane material is preheated by using the heat collecting plate as a component that is in direct contact with the thermoplastic polyurethane material.

[0015] Preferably, an electric push rod is installed inside the end of the material control piece close to the compression part, and the output end of the electric push rod is connected to a cut-off plate. The cut-off plate is telescopically installed with the material control piece through the electric push rod. The cut-off plate can fit in contact with the surface of the compression part to block the backflow movement of the thermoplastic polyurethane material.

[0016] The present invention provides a material extruder for processing thermoplastic polyurethane inner tubes, which has the following beneficial effects:

[0017] 1. The material extruder for processing the thermoplastic polyurethane inner tube can simultaneously insulate and collect heat from the inside to the outside of the extruder head through the annular wrapping installation of the head cover on the outside of the extruder head and the annular fitting contact of the inner bucket on the inside of the extruder head, thereby preventing the heat loss inside the extruder head and ensuring that the temperature inside the extruder head will not affect the extrusion operation of the thermoplastic polyurethane material, avoiding the thermoplastic polyurethane material from solidifying in the extruder head, and also preventing the thermoplastic polyurethane material from remaining inside the extruder head, thereby facilitating the subsequent disassembly and cleaning of the inside of the extruder head, avoiding the waste of thermoplastic polyurethane material, and saving the workload of laborious cleaning inside the extruder head, thereby improving the convenience of using the extruder and the smoothness of extrusion of the thermoplastic polyurethane material.

[0018] Second, the material extruder for processing the thermoplastic polyurethane inner tube can ensure the temperature inside the extrusion head at all times by connecting the extrusion head to the inner tube molding mold, so as to maintain the temperature at a level that can ensure that the thermoplastic polyurethane material is in a molten state, thereby avoiding the phenomenon of local temperature loss before the molten thermoplastic polyurethane material enters the mold, avoiding the thermoplastic polyurethane material that loses fluidity after entering the mold, and preventing defects such as lumps or bubbles from existing inside the molded inner tube.

[0019] 3. The material extruder for processing the thermoplastic polyurethane inner tube can continuously transfer the heat generated by the arched heat ring to the inner bucket and the heat collecting ring through the long pin rod, ensuring that there will be no large-scale temperature loss in the process of the thermoplastic polyurethane material passing through the extruder head and entering the mold, ensuring that the fluidity of the thermoplastic polyurethane material in each part of the barrel is consistent, and the thermoplastic polyurethane material will not be attached to the wall or blocked in the barrel or extruder head due to temperature loss.

[0020] Fourth, the material extruder for processing thermoplastic polyurethane inner tubes can remove the extension rod from the coupling on the output end of the reduction box, and the front end of the screw body is connected to the clamping rod through the long head connecting rod. When the extruder head is removed alone, the screw body can be removed together with the extruder head. In the process of removing the extruder head, the screw body can be pulled out of the barrel together, which is convenient for cleaning the surfaces of the screw body and the extruder head, making the cleaning and disassembly process of the extruder simple and convenient, reducing unnecessary additional disassembly processes, and saving the maintenance and cleaning costs of the extruder.

[0021] 5. The material extruder for processing the thermoplastic polyurethane inner tube can not only shield the thermoplastic polyurethane material by rotating and clamping the rotating shaft with the help of the ring cavity inside the barrel, ensuring that the screw body pushes the thermoplastic polyurethane material forward in a unidirectional spiral in the barrel, but also prevent the thermoplastic polyurethane material from penetrating and leaking into the heat collecting plug.

[0022] 6. The material extruder for processing the thermoplastic polyurethane inner tube can help the screw body to timely heat the thermoplastic polyurethane material that has just entered the barrel through the heat insulation effect of the heat collecting plug and the temperature collection effect of the trumpet bucket to the heat collecting plate. The heat collecting plate is used to concentrate the heat at the part where the thermoplastic polyurethane material enters the barrel through the feeding hopper to raise the temperature of the feeding part, thereby solving the temperature imbalance problem of the thermoplastic polyurethane material that has just entered the barrel at this part, eliminating the temperature loss phenomenon here, and ensuring the fluidity of the thermoplastic polyurethane material here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the external structure of a material extruder for processing a thermoplastic polyurethane inner tube according to the present invention;

[0024] Figure 2 It is a schematic diagram of the assembly structure of the heating body 2 through the bottom plate and the barrel of the present invention;

[0025] Figure 3 It is a schematic diagram of the assembly structure of the screw body and the barrel of the present invention;

[0026] Figure 4 It is a schematic diagram of the partial assembly structure of the extrusion head and the barrel of the present invention;

[0027] Figure 5 It is a schematic diagram of the assembly structure of the head cover and the extrusion head of the present invention;

[0028] Figure 6 It is a schematic diagram of the partial assembly structure of the screw body through the barrel and the extrusion head of the present invention;

[0029] Figure 7 It is a schematic diagram of the partial assembly structure of the feeding hopper and the barrel of the present invention;

[0030] Figure 8 It is a schematic diagram of the internal structure of the feeding hopper of the present invention;

[0031] Fig. 9 It is a schematic diagram of the overall structure of the screw body of the present invention;

[0032] Fig.10 It is a schematic diagram of the internal structure of the screw body of the present invention;

[0033] Fig.11 It is a schematic diagram of the partial assembly structure of the flat ring and the screw body of the present invention;

[0034] Fig.12 It is a schematic diagram of the partial assembly structure of the heat collecting plug and the extension rod of the present invention;

[0035] Fig.13 It is a schematic diagram of the partial assembly structure of the material control member and the screw body of the present invention.

[0036] In the figure: 1, bottom plate; 2, barrel; 3, feed hopper; 4, waste hopper; 5, screw body; 6, reduction box; 7, heating element 1; 8, heating element 2; 21, head cover; 22, extruder; 23, inner bucket; 24, heat conducting core; 25, heat collecting ring; 26, long pin rod; 27, clamp rod; 28, long head connecting rod; 221, ring cavity; 201, hoop groove; 31, inverted V-shaped plate; 32, piston petal; 33, sealing ring; 34. annular compression spring; 41. solenoid valve; 51. heat collecting plug; 52. extension rod; 53. feeding part; 54. compression part; 55. metering part; 56. material control part; 57. heating core; 58. insulation plug; 59. flat ring part; 510. rod frame; 511. trumpet bucket; 512. rotating shaft part; 513. heat collecting plate; 561. electric push rod; 562. stop plate; 81. heating sleeve; 82. arched heat ring. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0038] The first embodiment, as Figures 1 to 13 As shown, the present invention provides a technical solution: a material extruder for processing thermoplastic polyurethane inner tubes, comprising a bottom plate 1:

[0039] The barrel 2 is used to extrude the thermoplastic polyurethane material. The barrel 2 has a feeding hopper 3 for mixing and introducing the thermoplastic polyurethane material, and a waste hopper 4 fixedly installed on the barrel 2. The waste hopper 4 is used to discharge the material residue of the barrel 2. The waste hopper 4 is installed directly below the feeding hopper 3 through the barrel 2. The feeding hopper 3 is fixedly connected to the barrel 2.

[0040] The reduction box 6 is used to control the extrusion speed of the barrel 2. The reduction box 6 has a motor for providing driving force, and a heating body 7 installed on one side of the reduction box 6. A screw body 5 is installed in the middle of the reduction box 6, and the screw body 5 is rotatably installed with the barrel 2 through the reduction box 6 and the motor. A heating body 8 is fixedly installed on the top side of the bottom plate 1, and a plurality of heating sleeves 81 are connected to the output end of the heating body 8, and the heating sleeve 81 is set with the barrel 2 for heating the barrel 2. The heating sleeve 81 is installed with an arched heat ring 82 in a circular shape inside, which is used for heat collection and concentrates the heat on the barrel 2;

[0041] Among them, the front end of the barrel 2 is threadedly installed with an extrusion head 22, the surface of the extrusion head 22 is in a circular ring shape and is wrapped with a head cover 21, an inner bucket 23 is fitted on the inner side of the extrusion head 22, the inner bucket 23 is used to collect heat on the inner side of the extrusion head 22, a heat-conducting core 24 is embedded in the head cover 21, the heat-conducting core 24 is plugged into the output end of the heating sleeve 81, and a heat collecting ring 25 is embedded in the middle of the inner side of the front end of the head cover 21, and the heat collecting ring 25 is connected to the heating sleeve 81 through the heat-conducting core 24.

[0042] A long pin 26 is installed in a centrally symmetrical shape at the threaded connection portion between the extrusion head 22 and the barrel 2. The long pin 26 is threadedly installed with the head cover 21, the extrusion head 22 and the inner bucket 23 in sequence. A clamping rod 27 is fixedly connected to the middle part of the inner side of the extrusion head 22. A long head connecting rod 28 is inserted in the middle part of the clamping rod 27. The long head connecting rod 28 is rotatably connected to the front end of the screw body 5. The long head connecting rod 28 provides axial guidance for the rotation and extrusion of the screw body 5 inside the barrel 2.

[0043] An annular cavity 221 is provided in a circumferential shape inside the extrusion head 22, and the annular cavity 221 is used to collect heat inside the extrusion head 22, to form a protective layer around the inner bucket 23, and to store the heat dissipated from the inner bucket 23, and the annular cavity 221 corresponds to the inner bucket 23 and surrounds the inner bucket 23. A hoop groove 201 is provided on the inner side of the barrel 2 and at one end away from the extrusion head 22.

[0044] A solenoid valve 41 is installed at the portion where the waste hopper 4 is connected to the inside of the barrel 2. The solenoid valve 41 is used to guide the residual material inside the barrel 2 to the waste hopper 4 in a unidirectional manner, so that after shutdown, when the screw body 5 is reversely enabled to rotate in the barrel 2, the residual reverse scratches attached to the inner wall of the barrel 2 can be collected into the waste hopper 4 for discharge, thereby realizing automatic scraping and cleaning of the residue inside the barrel 2 without disassembling the extruder.

[0045] A heat collecting plug 51 is mounted on the surface of the screw body 5 and at one end close to the reduction box 6. The heat collecting plug 51 is made of rock wool material as a whole, and is installed in an interlocking manner with the barrel 2. An extension rod 52 is fixedly connected to one end of the screw body 5 close to the reduction box 6. The extension rod 52 is connected to the output end of the reduction box 6 through a coupling. A feeding part 53 is installed on the surface of the screw body 5 and at one end close to the reduction box 6. A compression part 54 is installed in the middle of the surface of the screw body 5. A metering part 55 is installed on the surface of the screw body 5 and at one end away from the reduction box 6.

[0046] A pair of material control parts 56 are installed between the feeding part 53 and the compression part 54, and a heating core 57 is installed in the middle of the inner side of the screw body 5, and the heating core 57 is connected to the output end of the heating body 7. An insulating plug 58 is inserted into the end of the heating core 57 close to the reduction box 6, and the heating core 57 is sealed and engaged with the extension rod 52 through the insulating plug 58. Flat ring parts 59 are symmetrically installed on both sides of the heating core 57, and the flat ring parts 59 are made of phase change material as a whole. A rod frame 510 is installed on the inner side of the flat ring part 59 in a centrally symmetrical shape, and the flat ring part 59 is mounted on the screw body 5 through the rod frame 510.

[0047] When in use, the heater 1 7 and the heater 2 8 are activated at the same time to heat the inside of the screw body 5 and the outside of the barrel 2 at the same time, and then the thermoplastic polyurethane material is introduced into the barrel 2 through the feeding hopper 3, and the motor drives the screw body 5 to rotate around its axis with the help of the reduction box 6 to heat the thermoplastic polyurethane material to a molten state, and then gradually spirally pushes it to the extrusion head 22 for extrusion, and the output end of the extrusion head 22 can be connected to the existing inner tube molding mold, thereby realizing the extrusion processing of the thermoplastic polyurethane inner tube.

[0048] By the annular wrapping installation of the head cover 21 on the outside of the extruder head 22 and the annular fitting contact of the inner bucket 23 on the inside of the extruder head 22, the inner and outer sides of the extruder head 22 can be insulated and heat collected from the inside to the outside, thereby preventing the heat loss inside the extruder head 22 and ensuring that the temperature inside the extruder head 22 will not affect the extrusion operation of the thermoplastic polyurethane material, thereby preventing the thermoplastic polyurethane material from solidifying in the extruder head 22 and preventing the thermoplastic polyurethane material from remaining inside the extruder head 22, thereby facilitating the subsequent disassembly and cleaning of the inside of the extruder head 22, thereby avoiding the waste of thermoplastic polyurethane material and saving the laborious cleaning work of the inside of the extruder head 22, thereby improving the convenience of using the extruder and the smoothness of the extrusion of the thermoplastic polyurethane material.

[0049] Through the above operation, the extrusion head 22 is connected to the molding mold of the inner tube, so that the temperature inside the extrusion head 22 can be maintained at a temperature that can ensure that the thermoplastic polyurethane material is in a molten state at all times, thereby avoiding the phenomenon of local temperature loss before the molten thermoplastic polyurethane material enters the mold, avoiding the thermoplastic polyurethane material entering the mold from losing fluidity, and preventing defects such as lumps or bubbles from existing inside the molded inner tube.

[0050] The heat generated by the arched heat ring 82 can be continuously transferred to the inner bucket 23 and the heat collecting ring 25 through the long pin rod 26, ensuring that the thermoplastic polyurethane material will not lose temperature over a large area during the process of entering the mold through the extruder head 22, ensuring that the fluidity of the thermoplastic polyurethane material in each part of the barrel 2 is consistent, and the thermoplastic polyurethane material will not hang on the wall or get blocked in the barrel 2 or the extruder head 22 due to temperature loss.

[0051] After shutdown, the extension rod 52 can be removed from the coupling on the output end of the reduction box 6. Combined with the rotational connection between the front end of the screw body 5 and the clamping rod 27 through the long head connecting rod 28, the screw body 5 can be removed together with the extrusion head 22 when the extrusion head 22 is removed alone. In the process of removing the extrusion head 22, the screw body 5 can be pulled out of the barrel 2 together, which is convenient for cleaning the surfaces of the screw body 5 and the extrusion head 22, making the cleaning and disassembly process of the extruder simple and convenient, reducing unnecessary additional disassembly processes, and saving the maintenance and cleaning costs of the extruder.

[0052] By rotating and clamping the rotating shaft 512 inside the barrel 2 with the help of the annular cavity 221, not only can the thermoplastic polyurethane material be shielded to ensure that the screw body 5 pushes the thermoplastic polyurethane material forward in a unidirectional spiral in the barrel 2, but also the thermoplastic polyurethane material can be prevented from penetrating and leaking into the heat collecting plug 51.

[0053] In addition, by heating the interior of the screw body 5 and its entirety by the heating body 1 7 and surrounding heating the outer side of the barrel 2 by the heating body 2 8, the thermoplastic polyurethane material inside the barrel 2 can be quickly heated and melted by utilizing this internal and external heating method, thereby shortening the melting process of the thermoplastic polyurethane material and also maintaining the internal heat of the barrel 2 at all times, thereby ensuring the balanced distribution of temperature inside the barrel 2. In addition, the hollow structure design of the screw body 5 is utilized to further automatically compensate for the temperature difference between the head and tail of the barrel 2, thereby achieving balanced control of the internal temperature of the barrel 2, thereby ensuring the fluidity of the thermoplastic polyurethane material and facilitating the extruder to adapt to the narrow melting temperature range of the thermoplastic polyurethane material, thereby enabling the extruder itself to be adaptively regulated in combination with the melting temperature range of the material itself.

[0054] The second embodiment is based on the first embodiment. Figure 7 and Figure 8 As shown, an inverted V-shaped plate 31 is fixedly installed in the middle of the inner side of the feeding hopper 3, and the V-mouth of the inverted V-shaped plate 31 is vertically pointed to the barrel 2. A piston petal 32 is installed in the middle of the inner side of the feeding hopper 3, and the number of the piston petals 32 is a pair, and the pair of piston petals 32 are hinged, and the opening direction of the pair of piston petals 32 is vertically pointed to the barrel 2, wherein the pair of piston petals 32 are fittedly installed on the bottom of the inverted V-shaped plate 31 through the feeding hopper 3, and the inverted V-shaped plate 31 is installed at the hinge in the middle of the pair of piston petals 32 through the feeding hopper 3.

[0055] A sealing ring 33 is installed on the top side of the piston petal 32. The sealing ring 33 is installed around the inverted V-shaped plate 31. The sealing ring 33 is embedded in the feeding hopper 3, and an annular compression spring 34 is installed at the embedded position of the sealing ring 33 and the feeding hopper 3. The sealing ring 33 is elastically installed with the feeding hopper 3 through the annular compression spring 34. The piston petal 32 is sealed and fitted with the feeding hopper 3 through the sealing ring 33 and the annular compression spring 34. The feeding hopper 3 is connected to the inside of the barrel 2 through the piston petal 32.

[0056] When in use, the thermoplastic polyurethane material introduced into the barrel 2 is divided into two equal streams for guidance by the inverted V-shaped plate 31, and under the unidirectional guidance of the piston petal 32, the sealing ring 33 uses the annular compression spring 34 to push and damp the tops of the two piston petals 32 to form a structural design for sealing and fitting contact, thereby preventing the thermoplastic polyurethane material introduced into the barrel 2 from flowing back under the spiral pushing action of the screw body 5, thereby ensuring the stable output of the thermoplastic polyurethane material in the barrel 2.

[0057] The third embodiment is based on the first and second embodiments. Fig. 9 , Fig.12 and Fig.13 As shown, a trumpet bucket 511 is embedded in the heat collecting plug 51, and the trumpet bucket 511 is installed at equal intervals inside the heat collecting plug 51 along the axis of the extension rod 52, a rotating shaft 512 is installed at the end of the trumpet bucket 511 away from the extension rod 52, and a heat collecting plate 513 is embedded in the side of the rotating shaft 512 away from the extension rod 52, and the trumpet mouth of the trumpet bucket 511 points to the heat collecting plate 513, and the heat collecting plug 51 is used to collect and gather the excess heat generated by the heating core 57 on the inner side of the screw body 5, and collect the heat on the heat collecting plate 513 with the help of the trumpet bucket 511, and the heat collecting plate 513 is used as a component that is in direct contact with the thermoplastic polyurethane material to preheat the thermoplastic polyurethane material.

[0058] An electric push rod 561 is installed inside one end of the material control piece 56 close to the compression part 54, and the output end of the electric push rod 561 is connected to a cut-off plate 562. The cut-off plate 562 is telescopically installed with the material control piece 56 through the electric push rod 561. The cut-off plate 562 can fit in contact with the surface of the compression part 54 to block the backflow movement of the thermoplastic polyurethane material.

[0059] When in use, the heat insulating effect of the heat collecting plug 51 and the temperature gathering effect of the horn 511 to the heat collecting plate 513 can help the screw body 5 to timely heat the thermoplastic polyurethane material that has just entered the barrel 2. The heat collecting plate 513 concentrates the heat at the location where the thermoplastic polyurethane material enters the barrel 2 through the feeding hopper 3 to raise the temperature of the feeding location, thereby solving the temperature imbalance problem of the thermoplastic polyurethane material that has just entered the barrel 2 at this location, eliminating the temperature loss phenomenon here, and ensuring the fluidity of the thermoplastic polyurethane material here.

[0060] Through the design of the screw body 5, the barrel 2 can be heated inside the barrel 2 by means of the heating core 57 with the help of the screw body 5, and at the same time, the material properties of the flat ring 59 made of phase change material can be utilized to store and release excess heat, thereby achieving effective utilization of heat and assisting in energy saving.

[0061] While the thermoplastic polyurethane material is extruded into the mold through the extrusion head 22, the two electric push rods 561 installed on the screw body 5 can be simultaneously activated to bidirectionally stop the thermoplastic polyurethane material between the screw body 5 and the barrel 2 with the help of the stop plate 562. After the thermoplastic polyurethane material fills the mold, the material will not flow back during the period when the extrusion head 22 is aligned with the mold. The thermoplastic polyurethane material that has been extruded from the extrusion head 22 will not flow back into the extrusion head 22, thereby ensuring that the quality of the subsequently extruded thermoplastic polyurethane material is not affected.

[0062] By designing the feeding part 53, the compression part 54 and the metering part 55, and by designing the thread tension structure at different parts of the screw body 5, the thermoplastic polyurethane material can be collected and fed, pressurized and condensed, and metered and extruded on the screw body 5, thereby improving the material conveying efficiency and mixing effect, and reducing the shear force on the thermoplastic polyurethane material, which helps to reduce the breakage of the polymer chain, thereby reducing the degradation of the material, maintaining its original physical and chemical properties, reducing the stress inside the material, and avoiding product quality problems caused by stress concentration, such as cracks, deformation, etc.; it can assist in reducing the energy consumption required in the extrusion process, thereby saving energy; it helps to reduce the roughness of the material surface and improve the appearance quality of the product; it can also reduce equipment wear and extend the maintenance cycle of the equipment, thereby improving production efficiency.

[0063] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A material extruder for processing thermoplastic polyurethane inner tubes, comprising a base plate (1), characterized in that: A barrel (2) is used to extrude a thermoplastic polyurethane material, the barrel (2) having a feed hopper (3) for mixing and introducing the thermoplastic polyurethane material, and a waste hopper (4) fixedly mounted on the barrel (2), the waste hopper (4) being used to discharge the material residue in the barrel (2), and the waste hopper (4) is mounted directly below the feed hopper (3) through the barrel (2), and the feed hopper (3) is fixedly connected to the barrel (2); A reduction box (6) for controlling the extrusion speed of the barrel (2), the reduction box (6) having a motor for providing a driving force, and a heater (7) mounted on one side of the reduction box (6), a screw body (5) being mounted in the middle of the reduction box (6), and the screw body (5) being rotatably mounted with the barrel (2) through the cooperation of the reduction box (6) and the motor, a heater (8) being fixedly mounted on the top side of the bottom plate (1), and a heating sleeve (81) being connected to the output end of the heater (8), and the heating sleeve (81) being fitted on the barrel (2) for heating the barrel (2), and an arched heat ring (82) being mounted in a circular ring shape inside the heating sleeve (81); The front end of the barrel (2) is threadedly mounted with an extrusion head (22), the surface of the extrusion head (22) is wrapped with a head cover (21) in a circular ring shape, an inner bucket (23) is fitted on the inner side of the extrusion head (22), a heat-conducting core (24) is embedded in the head cover (21), the heat-conducting core (24) is plugged into the output end of the heating cover (81), a heat-collecting ring (25) is embedded in the middle of the inner side of the front end of the head cover (21), and the heat-collecting ring (25) is connected to the heating cover (81) via the heat-conducting core (24); An inverted V-shaped plate (31) is fixedly mounted on the middle of the inner side of the feeding hopper (3), the V-mouth of the inverted V-shaped plate (31) points vertically towards the barrel (2), a piston flap (32) is mounted on the middle of the inner side of the feeding hopper (3), and the number of the piston flaps (32) is a pair, and the pair of piston flaps (32) are hinged to each other, and the opening direction of the pair of piston flaps (32) is vertically pointing towards the barrel (2), wherein the pair of piston flaps (32) are fitted on the bottom of the inverted V-shaped plate (31) through the feeding hopper (3), and the inverted V-shaped plate (31) is mounted at the hinge in the middle of the pair of piston flaps (32) through the feeding hopper (3); A sealing ring (33) is fitted on the top side of the piston flap (32). The sealing ring (33) is mounted around the inverted V-shaped plate (31). The sealing ring (33) is fitted with the feeding hopper (3). An annular compression spring (34) is installed at the portion where the sealing ring (33) and the feeding hopper (3) are fitted. The sealing ring (33) is elastically mounted on the feeding hopper (3) via the annular compression spring (34). The piston flap (32) is sealed and fitted with the feeding hopper (3) via the sealing ring (33) and the annular compression spring (34). The feeding hopper (3) is connected to the interior of the barrel (2) via the piston flap (32).

2. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 1, characterized in that: A long pin rod (26) is installed in a centrally symmetrical manner at the threaded connection portion between the extrusion head (22) and the barrel (2); the long pin rod (26) is threadedly installed with the head cover (21), the extrusion head (22) and the inner bucket (23) in sequence; a clamping rod (27) is fixedly connected to the middle part of the inner side of the extrusion head (22); a long head connecting rod (28) is inserted in the middle part of the clamping rod (27); and the long head connecting rod (28) is rotatably connected to the front end of the screw body (5).

3. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 2, characterized in that: The extrusion head (22) has an annular cavity (221) formed inside in a circumferential shape, and the annular cavity (221) corresponds to the inner bucket (23) and surrounds the inner bucket (23). A hoop groove (201) is formed on the inner side of the barrel (2) and at one end away from the extrusion head (22).

4. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 3, characterized in that: A solenoid valve (41) is installed at a portion where the waste hopper (4) is connected to the interior of the barrel (2).

5. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 4, characterized in that: A heat collecting plug (51) is sleeved on the surface of the screw body (5) and at one end close to the reduction box (6); the heat collecting plug (51) is made of rock wool material as a whole, and is mounted in a chimeric manner with the barrel (2); an extension rod (52) is fixedly connected to one end of the screw body (5) close to the reduction box (6); the extension rod (52) is connected to the output end of the reduction box (6) through a coupling; a feeding portion (53) is mounted on the surface of the screw body (5) and at one end close to the reduction box (6); a compression portion (54) is mounted in the middle of the surface of the screw body (5); and a metering portion (55) is mounted on the surface of the screw body (5) and at one end away from the reduction box (6); the pitch of the thread structure of the feeding portion (53), the pitch of the thread structure of the compression portion (54), and the pitch of the thread structure of the metering portion (55) are successively smaller, and the pitches between the thread structures of the metering portion (55) are the same.

6. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 5, characterized in that: A pair of material control parts (56) are installed between the feeding part (53) and the compression part (54); a heating core (57) is installed in the middle of the inner side of the screw body (5); the heating core (57) is connected to the output end of the heating body (7); a heat insulation plug (58) is inserted into the end of the heating core (57) close to the reduction box (6); the heating core (57) is sealed and engaged with the extension rod (52) through the heat insulation plug (58); flat ring parts (59) are symmetrically installed on both sides of the heating core (57); the flat ring parts (59) are made of phase change material as a whole; a rod frame (510) is installed on the inner side of the flat ring part (59) in a centrally symmetrical shape; the flat ring part (59) is mounted on the screw body (5) through the rod frame (510).

7. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 6, characterized in that: A trumpet hopper (511) is embedded in the heat collector plug (51), and the trumpet hopper (511) is installed at equal intervals inside the heat collector plug (51) along the axis of the extension rod (52); a rotating shaft (512) is installed at one end of the trumpet hopper (511) away from the extension rod (52), and a heat collector plate (513) is embedded in one side of the rotating shaft (512) away from the extension rod (52), and the trumpet mouth of the trumpet hopper (511) points to the heat collector plate (513).

8. A material extruder for processing thermoplastic polyurethane inner tubes according to claim 7, characterized in that: An electric push rod (561) is installed inside one end of the material control member (56) close to the compression portion (54), and an output end of the electric push rod (561) is connected to a cut-off plate (562), and the cut-off plate (562) is telescopically installed with the material control member (56) through the electric push rod (561).

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