CN113021821A

CN113021821A - PET foaming material extrusion cutting device for automotive interior and using method thereof

Info

Publication number: CN113021821A
Application number: CN202110293837.XA
Authority: CN
Inventors: 李赛; 赵远
Original assignee: Jiangsu Welke Polymer Material Co ltd
Current assignee: Jiangsu Welke Polymer Material Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-06-25

Abstract

The invention discloses a PET (polyethylene terephthalate) foam material extrusion cutting device for automotive interiors and a using method thereof, and belongs to the field of automotive interior processing. The utility model provides a PET expanded material extrudes cutting device for automotive interior, includes the backup pad, still includes: the tail end of the conveying cylinder is provided with a die and is fixedly arranged at the upper end of the supporting plate, wherein a material pushing and extruding mechanism is arranged in the conveying cylinder; the discharge pipe extends to the upper charging barrel in the conveying barrel and is fixedly arranged at the upper end of the conveying barrel; the outer wall of the cylindrical block is fixedly provided with a foam hot cutter, and the cylindrical block is connected with the extruding mechanism through a transmission mechanism and is used for automatically cutting the extruded raw material; the inner part of the fan-shaped cover is provided with a cavity and is connected with the cylindrical block through a sliding mechanism, wherein the side wall of the fan-shaped cover is provided with a clearing mechanism corresponding to the foam hot cutter; the PET foaming material extrusion cutting device can automatically clean the foam cutting knife, and the chamfer angle can not occur when the material is cut.

Description

PET foaming material extrusion cutting device for automotive interior and using method thereof

Technical Field

The invention relates to the technical field of automobile interior processing, in particular to a PET (polyethylene terephthalate) foam material extrusion cutting device for automobile interior and a using method thereof.

Background

Automotive interior mainly indicates the automobile product that the inside repacking of car used, involves the square face of car inside, for example car steering wheel cover, car cushion, car callus on the sole, car perfume, car pendant, inside goods of furniture for display rather than for use, containing box etc. all are automotive interior product to some automotive interior can also use the frivolous solid PET expanded material of material.

In the processing of PET foaming material for automobile interior, raw materials need to be extruded and then cut off equally through a foam hot cutter, and in the long-term use of the foam hot cutter, the fact that when the foam hot cutter is used for cutting off the PET foaming material, a small amount of PET foaming material is easily adhered to the surface of the foam hot cutter, and the foam hot cutter is hardened under the long-term heating action of the foam hot cutter and attached to the surface of the foam hot cutter, not only is the cutting performance of the foam hot cutter affected, but also scratches are caused to the cut.

Disclosure of Invention

The invention aims to solve the problem that a foam hot cutter for PET foaming materials in the prior art is easy to adhere raw materials to influence cutting, and provides an extrusion cutting device for PET foaming materials for automotive interiors and a using method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a PET expanded material extrudes cutting device for automotive interior, includes the backup pad, still includes: the tail end of the conveying cylinder is provided with a die and is fixedly arranged at the upper end of the supporting plate, wherein a material pushing and extruding mechanism is arranged in the conveying cylinder and is used for extruding materials in the conveying cylinder; the discharge pipe extends to the feeding barrel in the conveying barrel, is fixedly arranged at the upper end of the conveying barrel and is used for feeding the conveying barrel; the outer wall of the cylindrical block is fixedly provided with a foam hot cutter, and the cylindrical block is connected with the extruding mechanism through a transmission mechanism and is used for automatically cutting the extruded raw material; the inside is equipped with the fan-shaped cover of cavity, through slide mechanism with the cylinder piece is connected, is used for the protection and the heat preservation of foam heat cutter, wherein, the lateral wall of fan-shaped cover is equipped with the clearance mechanism that corresponds with foam heat cutter, is used for cleaing away the impurity of foam heat cutter lateral wall.

In order to extrude the material in the conveying cylinder, preferably, the extruding mechanism comprises a motor fixedly installed on the side wall of the conveying cylinder, the output end of the motor is fixedly connected with a driving shaft extending into the conveying cylinder, and the outer wall of the driving shaft is fixedly provided with a spiral sheet matched with the inner wall of the conveying cylinder.

In order to cut the extruded material, preferably, the transmission mechanism comprises a transmission shaft which is rotatably connected to the upper end of the conveying cylinder through a support, the transmission shaft is in chain transmission connection with an output shaft of the motor, a first slide bar is fixedly connected to the right end of the transmission shaft, a first sliding groove matched with the first slide bar is formed in the side wall of the cylindrical block, and a propelling mechanism connected with the transmission shaft is arranged on the outer wall of the cylindrical block.

Appear the scarf in order to place the material, it is further, advancing mechanism includes two risers of fixed connection at the cylinder piece outer wall, two it is connected with the bull stick to rotate between the riser, the outer wall fixedly connected with straight-teeth gear of bull stick, the straight-teeth gear is corresponding with foam heat cutter's position, the lateral wall of riser is equipped with the clockwork spring with bull stick elastic connection, the right-hand member fixedly connected with threaded rod of bull stick, the lateral wall fixedly connected with connecting plate of transmission shaft, the lateral wall of connecting plate be equipped with threaded rod complex screw hole, the lateral wall fixedly connected with and the straight-teeth gear complex arc rack of mould.

In order to synchronize the fan-shaped cover and the foam hot cutter, preferably, the sliding mechanism comprises a positioning block rotatably connected to the shaft end of the cylindrical block, the fan-shaped cover is fixedly connected to the outer wall of the positioning block through a connecting rod, a guide rod arranged in parallel with the cylindrical block is fixedly connected to the side wall of the fan-shaped cover, a sleeve slidably connected with the guide rod is sleeved on the outer wall of the guide rod, and the sleeve is fixedly connected to the upper end of the conveying cylinder.

In order to remove the material residues on the outer wall of the foam hot cutter, preferably, the removing mechanism comprises two device plates fixedly connected to the outer wall of the fan-shaped cover, the two device plates all extend into the fan-shaped cover, the opposite side walls of the two device plates are provided with U-shaped grooves, the ports of the two U-shaped grooves are fixedly provided with scrapers matched with the foam hot cutter, and one ends of the two device plates, which are positioned on the outer wall of the fan-shaped cover, are inclined downwards.

In order to promote the slag discharging efficiency of the U-shaped groove, the outer wall of the cylindrical block is fixedly provided with a rubber air bag, the side wall of the rubber air bag is provided with an air suction pipe and an air blowing pipe, the side wall of the fan-shaped cover is fixedly connected with an extrusion block corresponding to the rubber air bag, two blowing nozzles corresponding to the two U-shaped grooves are installed in the outer wall of the cylindrical block, and the two blowing nozzles are fixedly connected with and communicated with the tail end of the air blowing pipe through connecting pipes.

In order to prevent the extrusion block from damaging the rubber air bag, the cross section of the extrusion block is triangular.

The use method of the PET foaming material extrusion cutting device applied to the automotive interior comprises the following steps:

step 1: feeding the conveying cylinder through the feeding cylinder, and turning on the motor;

step 2: the motor drives the spiral piece to rotate to convey the material and discharge the material from the outlet of the die;

and step 3: the motor drives the transmission shaft and the cylindrical block to rotate through chain transmission, and the cylindrical block drives the foam hot cutter to automatically cut extruded materials;

and 4, step 4: the threaded rod rotates when the foam hot cutter cuts materials, so that an inclined notch cannot be formed when the foam hot cutter cuts the materials;

and 5: the fan-shaped cover can protect and insulate the foam hot cutter, so that resource waste is reduced;

step 6: when the foam hot cutter rotates to cut, material residues on the outer wall can be removed through the two scrapers, and the material residues are recycled and discharged through the U-shaped groove;

and 7: when the cylinder piece rotated, can make extrusion piece pressurization rubber gasbag, rubber gasbag can blow to the U-shaped groove through the blow gun, promoted the sediment efficiency of arranging in U-shaped groove.

Compared with the prior art, the invention provides a PET foaming material extrusion cutting device for automobile interior decoration, which has the following beneficial effects:

1. according to the PET foaming material extrusion cutting device for the automotive interior, materials extruded by the die can be automatically cut off through the rotating foam hot cutter.

2. This cutting device is extruded to PET expanded material for automotive interior can drive the foam hot knife through the pivoted threaded rod and slide right with the material is synchronous, prevents that the incision that the foam hot knife formed is the inclined plane form.

3. This cutting device is extruded to PET expanded material for automotive interior can protect and keep warm the foam heat cutter through fan-shaped cover, has reduced the loss of resource.

4. This cutting device is extruded to PET expanded material for automotive interior, can strike off the material residue of foam hot knife outer wall through the scraper, guaranteed the cutting quality of foam hot knife.

5. This cutting device is extruded to PET expanded material for automotive interior can make the sediment efficiency of arranging in U-shaped groove promote greatly through extrusion rubber gasbag.

Drawings

FIG. 1 is a schematic structural view of an extrusion cutting apparatus for PET foam for automotive interior according to the present invention;

FIG. 2 is a schematic structural diagram of a position A in FIG. 1 of a PET foam extrusion cutting device for automotive interior according to the present invention;

FIG. 3 is a schematic diagram of a right-view partial cut-away structure of a PET foam material extrusion cutting device for automotive interior according to the present invention;

FIG. 4 is a schematic structural diagram of a PET foam extrusion cutting device for automobile interior decoration shown in FIG. 3 at B;

FIG. 5 is a schematic axial view of a fan-shaped cover of the PET foam extrusion cutting device for automotive interior according to the present invention;

fig. 6 is a schematic axial cross-sectional structure view of two device plates of the PET foam extrusion cutting device for automotive interiors according to the present invention.

In the figure: 1. a support plate; 2. a delivery cartridge; 3. a mold; 4. a motor; 5. a drive shaft; 6. a spiral sheet; 7. feeding a material barrel; 8. a discharge pipe; 9. a cylindrical block; 10. a foam hot cutter; 11. a fan-shaped cover; 12. a cavity; 13. a support; 14. a drive shaft; 15. chain transmission; 16. a first chute; 17. a first slide bar; 18. a connecting plate; 19. a threaded hole; 20. a threaded rod; 21. a vertical plate; 22. a rotating rod; 23. a spur gear; 24. a clockwork spring; 25. a connecting rod; 26. a sleeve; 27. a guide bar; 28. a mounting plate; 29. a U-shaped groove; 30. an arc-shaped rack; 31. a rubber air bag; 32. an air blowing pipe; 33. an air intake duct; 34. a blowing nozzle; 35. a connecting pipe; 36. extruding the block; 37. positioning blocks; 38. and (4) scraping the blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1 to 6, an extrusion cutting device for PET foam for automotive interior includes a support plate 1, and further includes: the tail end of the conveying cylinder 2 is provided with a die 3, and the conveying cylinder 2 is fixedly arranged at the upper end of the supporting plate 1, wherein a material pushing and extruding mechanism is arranged in the conveying cylinder 2 and used for extruding materials in the conveying cylinder 2; the discharge pipe 8 extends to the upper material barrel 7 in the conveying barrel 2, is fixedly arranged at the upper end of the conveying barrel 2 and is used for feeding the conveying barrel 2; the outer wall of the cylindrical block 9 is fixedly provided with a foam hot cutter 10, and the cylindrical block is connected with the extruding mechanism through a transmission mechanism and is used for automatically cutting the extruded raw material; the inside fan-shaped cover 11 that is equipped with cavity 12 is connected with cylinder piece 9 through slide mechanism for the protection and the heat preservation of foam hot knife 10, wherein, the lateral wall of fan-shaped cover 11 is equipped with the clearance mechanism that corresponds with foam hot knife 10 for clear away the impurity of foam hot knife 10 lateral wall.

Further, extrusion mechanism includes motor 4 of fixed mounting at 2 lateral walls of a transport section of thick bamboo, motor 4's output end fixedly connected with extends to the driving shaft 5 in the transport section of thick bamboo 2, the outer wall fixed mounting of driving shaft 5 have with 2 inner wall complex flights of a transport section of thick bamboo 6, motor 4 drives the flight 6 rotation in the transport section of thick bamboo 2 through driving shaft 5, flight 6 then can be with the material in the transport section of thick bamboo 2 to mould 3 direction transport extrusion, the material shaping is extruded in mould 3.

Example 2

Referring to fig. 1-3, substantially the same as in example 1, further: the transmission mechanism comprises a transmission shaft 14 which is rotatably connected to the upper end of the conveying cylinder 2 through a support 13, the transmission shaft 14 is connected with an output shaft of the motor 4 through a chain transmission 15, a first slide bar 17 is fixedly connected to the right end of the transmission shaft 14, a first slide groove 16 matched with the first slide bar 17 is formed in the side wall of the cylindrical block 9, a propelling mechanism connected with the transmission shaft 14 is arranged on the outer wall of the cylindrical block 9, the motor 4 can drive the transmission shaft 14 to rotate through the chain transmission 15, the transmission shaft 14 can drive the cylindrical block 9 to rotate through the first slide bar 17 and the first slide groove 16, the cylindrical block 9 can drive the foam hot cutter 10 on the outer wall to rotate, when the foam hot cutter 10 rotates, materials extruded by the die 3 can be automatically cut off, and the automatic propelling mechanism can guarantee the cutting.

Furthermore, the propulsion mechanism comprises two vertical plates 21 fixedly connected to the outer wall of the cylindrical block 9, a rotating rod 22 is rotatably connected between the two vertical plates 21, a straight gear 23 is fixedly connected to the outer wall of the rotating rod 22, the straight gear 23 corresponds to the position of the foam heat cutter 10, a clockwork spring 24 elastically connected to the rotating rod 22 is arranged on the side wall of the vertical plate 21, a threaded rod 20 is fixedly connected to the right end of the rotating rod 22, a connecting plate 18 is fixedly connected to the side wall of the transmission shaft 14, a threaded hole 19 matched with the threaded rod 20 is formed in the side wall of the connecting plate 18, an arc-shaped rack 30 matched with the straight gear 23 is fixedly connected to the side wall of the die 3, when the cylindrical block 9 rotates, the straight gear 23 can be driven to rotate around the transmission shaft 14 by the cylindrical block 9, when the foam heat cutter 10 rotates to the cutting position, the straight gear 23 can be meshed with, the straight gear 23 can drive the rotating rod 22 and the threaded rod 20 to rotate, the threaded rod 20 can slide rightwards under the action of the threaded hole 19, the threaded rod 20 drives the cylindrical block 9 and the foam hot cutter 10 on the outer wall to synchronously slide rightwards, so that when the foam hot cutter 10 cuts materials, the materials extruded by the die 3 synchronously slide rightwards, and cuts formed by the foam hot cutter 10 are prevented from being in an inclined plane shape.

Example 3

Referring to fig. 1, substantially the same as in embodiment 1, further: slide mechanism is including rotating the locating piece 37 of connection at the 9 axle heads of cylinder piece, fan-shaped cover 11 passes through connecting rod 25 fixed connection at the outer wall of locating piece 37, the lateral wall fixedly connected with of fan-shaped cover 11 and cylinder piece 9 parallel arrangement's guide bar 27, the outer wall cover of guide bar 27 is equipped with rather than sliding connection's sleeve 26, sleeve 26 fixed connection is in the upper end of carrying a section of thick bamboo 2, fan-shaped cover 11 can keep warm to the heat of foam heat cutter 10, and prevent external object and touch with it, when cylinder piece 9 slides right, cylinder piece 9 can drive fan-shaped cover 11 through locating piece 37 and connecting rod 25 and slide in step right, prevent that foam heat cutter 10 from touching with the inner wall of cavity 12, when fan-shaped cover 11 slides, fan-shaped cover 11 can drive guide bar 27 and slide in sleeve 26, play the guide effect, and prevent that fan-shaped cover 11 from following cylinder piece.

Example 4

Referring to fig. 3, 5 and 6, basically the same as embodiment 1, further: the cleaning mechanism comprises two device plates 28 fixedly connected to the outer wall of the fan-shaped cover 11, the two device plates 28 extend into the fan-shaped cover 11, U-shaped grooves 29 are formed in opposite side walls of the two device plates 28, scrapers 38 matched with the foam heat cutter 10 are fixedly mounted at ports of the two U-shaped grooves 29, one ends of the two device plates 28, which are positioned on the outer wall of the fan-shaped cover 11, are obliquely downwards arranged, when the foam heat cutter 10 rotates around the transmission shaft 14, the foam heat cutter 10 can penetrate through the two device plates 28 once rotates, and when the foam heat cutter penetrates through the foam heat cutter, the dried and hardened materials on the outer wall of the foam heat cutter 10 can be scraped into the U-shaped grooves 29 by the two scrapers 38, so that the outer wall of the foam heat cutter 10 can be effectively cleaned, the cutting quality of the foam heat cutter 10 is ensured, and residues in the U-shaped grooves 29 can be automatically discharged from the lower, and when the fan-shaped cover 11 slides, the device plate 28 is driven to shake, so that the slag discharging efficiency is indirectly improved.

Example 5

Referring to fig. 4, substantially the same as in embodiment 1, further: the outer wall fixed mounting of cylinder piece 9 has rubber gasbag 31, the lateral wall of rubber gasbag 31 is equipped with breathing pipe 33 and gas blow pipe 32, the fixed fixedly connected with of lateral wall of fan-shaped cover 11 and the extrusion piece 36 that rubber gasbag 31 position corresponds, two blow nozzles 34 that correspond with two U-shaped grooves 29 are installed to the outer wall of cylinder piece 9 is fixed, two blow nozzles 34 are all through connecting pipe 35 and the terminal fixed connection and the intercommunication of gas blow pipe 32, when cylinder piece 9 rotates, cylinder piece 9 can drive rubber gasbag 31 circular rotation, when rubber gasbag 31 contacts with extrusion piece 36, the forehead gas can be carried for blow nozzle 34 through gas blow pipe 32 and connecting pipe 35 in the rubber gasbag 31, then blow out to the U-shaped groove 29 from blow nozzle 34, thereby blow down the residue in the U-shaped groove 29, promote the row's of U-shaped groove 29 efficiency.

Furthermore, the cross section of the extrusion block 36 is triangular, so as to prevent damage to the rubber air bag 31.

A use method of a PET foaming material extrusion cutting device for automobile interior decoration comprises the following steps:

step 1: feeding the conveying cylinder 2 through the feeding cylinder 7, and turning on the motor 4;

step 2: the motor 4 drives the spiral sheet 6 to rotate to convey the material and discharge the material from the outlet of the die 3;

and step 3: the motor 4 drives the transmission shaft 14 and the cylindrical block 9 to rotate through the chain transmission 15, and the cylindrical block 9 drives the foam hot cutter 10 to automatically cut extruded materials;

and 4, step 4: the threaded rod 20 rotates when the foam hot cutting knife 10 cuts materials, so that inclined cuts cannot occur when the foam hot cutting knife 10 cuts materials;

and 5: the fan-shaped cover 11 can protect and insulate the foam hot cutter 10, so that the resource waste is reduced;

step 6: when the foam hot cutter 10 rotates to cut, the material residue on the outer wall is removed through the two scrapers 38, and is recycled and discharged through the U-shaped groove 29;

and 7: when the cylindrical block 9 rotates, the extrusion block 36 can pressurize the rubber air bag 31, the rubber air bag 31 can blow air to the U-shaped groove 29 through the blowing nozzle 34, and the slag discharging efficiency of the U-shaped groove 29 is improved.

The working principle is as follows: in the invention, when in use, the feeding cylinder 7 feeds the conveying cylinder 2 through the discharging pipe 8, during the feeding again, the motor 4 drives the spiral sheet 6 in the conveying cylinder 2 to rotate through the driving shaft 5, the spiral sheet 6 can convey and extrude the material in the conveying cylinder 2 to the direction of the mould 3, the material is formed and extruded in the mould 3, during the period, the motor 4 can drive the transmission shaft 14 to rotate through the chain transmission 15, the transmission shaft 14 can drive the cylindrical block 9 to rotate through the first sliding rod 17 and the first sliding chute 16, the cylindrical block 9 can drive the foam hot cutter 10 on the outer wall to rotate, when the foam hot cutter 10 rotates, the material extruded from the mould 3 can be automatically cut off, when the cylindrical block 9 rotates, the cylindrical block 9 can drive the straight gear 23 to rotate around the transmission shaft 14, when the foam hot cutter 10 rotates to the cutting position, the straight gear 23 can be meshed with the arc-shaped rack 30, the straight gear 23 rotates under the action of the arc rack 30, the straight gear 23 drives the rotating rod 22 and the threaded rod 20 to rotate, the threaded rod 20 slides rightwards under the action of the threaded hole 19, the threaded rod 20 drives the cylindrical block 9 and the foam heat cutter 10 on the outer wall to slide rightwards synchronously, when the foam heat cutter 10 cuts materials, the material extruded by the die 3 slides rightwards synchronously, the cut formed by the foam heat cutter 10 is prevented from being in an inclined plane shape, when the straight gear 23 is separated from the arc rack 30, the rotating rod 22 drives the threaded rod 20 to rotate reversely and reset under the action of the spiral spring 24, so that the cylindrical block 9 and the foam heat cutter 10 automatically reset to prepare for next cutting, the fan-shaped cover 11 can preserve heat of the foam heat cutter 10 and prevent an external object from touching the fan-shaped cover, when the cylindrical block 9 slides rightwards, the cylindrical block 9 drives the fan-shaped cover 11 to slide rightwards synchronously through the positioning block 37 and the connecting rod 25, the foam hot cutter 10 is prevented from touching the inner wall of the cavity 12, when the fan-shaped cover 11 slides, the fan-shaped cover 11 can drive the guide rod 27 to slide in the sleeve 26, the guide function is achieved, the fan-shaped cover 11 is prevented from rotating along the circumference of the cylindrical block 9, when the foam hot cutter 10 rotates around the transmission shaft 14, the foam hot cutter 10 can penetrate through the space between the two device plates 28 once rotating, when penetrating, the two scrapers 38 can scrape the dried and hardened material on the outer wall of the foam hot cutter 10 into the U-shaped groove 29, so that the outer wall of the foam hot cutter 10 is effectively cleaned, the cutting quality of the foam hot cutter 10 is ensured, as the device plates 28 are arranged in a downward inclined mode, residues in the U-shaped groove 29 can be automatically discharged from the lower port, and when the fan-shaped cover 11 slides, the device plates 28 can be driven to shake, so that the slag discharging efficiency is indirectly improved, when the cylindrical block 9 rotates, the cylindrical block 9 can drive the rubber air bag 31 to rotate circumferentially, when the rubber air bag 31 is contacted with the extrusion block 36, the air in the rubber air bag 31 can be conveyed to the blowing nozzle 34 through the air blowing pipe 32 and the connecting pipe 35, and then the air is blown out from the blowing nozzle 34 into the U-shaped groove 29, so that the residues in the U-shaped groove 29 are blown down, the discharge efficiency of the U-shaped groove 29 is improved, and when the extrusion block 36 is separated from the rubber air bag 31, the rubber air bag 31 is elastically reset and sucks air through the air suction pipe 33.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a PET expanded material extrudes cutting device for automotive interior, includes backup pad (1), its characterized in that still includes:

a conveying cylinder (2) with a mould (3) at the tail end is fixedly arranged at the upper end of the supporting plate (1),

the conveying cylinder (2) is internally provided with a material pushing and extruding mechanism for extruding the material in the conveying cylinder (2);

the discharging pipe (8) extends to the upper charging barrel (7) in the conveying barrel (2), is fixedly arranged at the upper end of the conveying barrel (2) and is used for feeding the conveying barrel (2);

the outer wall of the cylinder block (9) is fixedly provided with a foam hot cutter (10), and the cylinder block is connected with the extruding mechanism through a transmission mechanism and is used for automatically cutting the extruded raw materials;

a fan-shaped cover (11) with a cavity (12) arranged inside is connected with the cylindrical block (9) through a sliding mechanism and is used for protecting and insulating the foam hot cutter (10),

and a removing mechanism corresponding to the foam hot cutter (10) is arranged on the side wall of the fan-shaped cover (11) and used for removing impurities on the side wall of the foam hot cutter (10).

2. The extrusion cutting device for the PET foaming material for the automotive interior according to claim 1, wherein the extrusion mechanism comprises a motor (4) fixedly installed on the side wall of the conveying cylinder (2), the output end of the motor (4) is fixedly connected with a driving shaft (5) extending into the conveying cylinder (2), and the outer wall of the driving shaft (5) is fixedly provided with a spiral sheet (6) matched with the inner wall of the conveying cylinder (2).

3. The extrusion cutting device for the PET foaming material for the automotive interior according to claim 1, wherein the transmission mechanism comprises a transmission shaft (14) rotatably connected to the upper end of the conveying cylinder (2) through a support (13), the transmission shaft (14) is connected with an output shaft of the motor (4) through a chain transmission (15), a first sliding rod (17) is fixedly connected to the right end of the transmission shaft (14), a first sliding groove (16) matched with the first sliding rod (17) is formed in the side wall of the cylindrical block (9), and a propelling mechanism connected with the transmission shaft (14) is arranged on the outer wall of the cylindrical block (9).

4. The extrusion cutting device of PET foaming material for automobile interior according to claim 3, it is characterized in that the propulsion mechanism comprises two vertical plates (21) fixedly connected with the outer wall of the cylindrical block (9), a rotating rod (22) is rotatably connected between the two vertical plates (21), the outer wall of the rotating rod (22) is fixedly connected with a straight gear (23), the position of the straight gear (23) corresponds to that of the foam hot cutting knife (10), a clockwork spring (24) elastically connected with the rotating rod (22) is arranged on the side wall of the vertical plate (21), the right end of the rotating rod (22) is fixedly connected with a threaded rod (20), the side wall of the transmission shaft (14) is fixedly connected with a connecting plate (18), the side wall of the connecting plate (18) is provided with a threaded hole (19) matched with the threaded rod (20), the side wall of the die (3) is fixedly connected with an arc-shaped rack (30) matched with the straight gear (23).

5. The extrusion cutting device for the PET foaming material for the automotive interior according to claim 1, wherein the sliding mechanism comprises a positioning block (37) rotatably connected to the shaft end of the cylindrical block (9), the fan-shaped cover (11) is fixedly connected to the outer wall of the positioning block (37) through a connecting rod (25), a guide rod (27) arranged in parallel with the cylindrical block (9) is fixedly connected to the side wall of the fan-shaped cover (11), a sleeve (26) in sliding connection with the guide rod (27) is sleeved on the outer wall of the guide rod (27), and the sleeve (26) is fixedly connected to the upper end of the conveying cylinder (2).

6. The extrusion cutting device for the PET foaming material for the automotive interior according to claim 1, characterized in that the removing mechanism comprises two device plates (28) fixedly connected to the outer wall of the fan-shaped cover (11), each of the two device plates (28) extends into the fan-shaped cover (11), opposite side walls of the two device plates (28) are provided with U-shaped grooves (29), the end openings of the two U-shaped grooves (29) are fixedly provided with scrapers (38) matched with the foam hot cutter (10), and one ends of the two device plates (28) positioned on the outer wall of the fan-shaped cover (11) are obliquely arranged downwards.

7. The extrusion cutting device for the PET foaming material for the automobile interior according to claim 6, wherein a rubber air bag (31) is fixedly installed on the outer wall of the cylindrical block (9), an air suction pipe (33) and an air blowing pipe (32) are arranged on the side wall of the rubber air bag (31), an extrusion block (36) corresponding to the rubber air bag (31) is fixedly connected to the side wall of the fan-shaped cover (11), two blowing nozzles (34) corresponding to the two U-shaped grooves (29) are installed in the outer wall of the cylindrical block (9), and the two blowing nozzles (34) are fixedly connected and communicated with the tail end of the air blowing pipe (32) through a connecting pipe (35).

8. The extrusion cutting device of the PET foaming material for the automobile interior decoration as claimed in claim 7, wherein the cross section of the extrusion block (36) is triangular.

9. The method for using the PET foam extrusion cutting device for automobile interior decoration according to claim 1 is characterized by comprising the following steps:

step 1: feeding the conveying cylinder (2) through the feeding cylinder (7), and turning on the motor (4);

step 2: the motor (4) drives the spiral sheet (6) to rotate to convey the material and discharge the material from an outlet of the die (3);

and step 3: the motor (4) drives the transmission shaft (14) and the cylindrical block (9) to rotate through the chain transmission (15), and the cylindrical block (9) drives the foam hot cutter (10) to automatically cut extruded materials;

and 4, step 4: the threaded rod (20) rotates when the foam hot cutter (10) cuts materials, so that an inclined cut cannot occur when the foam hot cutter (10) cuts the materials;

and 5: the fan-shaped cover (11) can protect and insulate the foam hot cutter (10), so that the resource waste is reduced;

step 6: when the foam hot cutter (10) rotates to cut, material residues on the outer wall can be removed through the two scrapers (38), and the material residues are recovered and discharged through the U-shaped groove (29);

and 7: when the cylindrical block (9) rotates, the extrusion block (36) can pressurize the rubber air bag (31), the rubber air bag (31) can blow air to the U-shaped groove (29) through the blowing nozzle (34), and the slag discharging efficiency of the U-shaped groove (29) is improved.