CN116141456A

CN116141456A - PVC sheet surface preheating device that can adjust temperature

Info

Publication number: CN116141456A
Application number: CN202310036698.1A
Authority: CN
Inventors: 何文帅; 郭云杰; 易永军
Original assignee: Guangdong Greeno Industrial Co ltd
Current assignee: Guangdong Greeno Industrial Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-05-23
Anticipated expiration: 2043-01-09
Also published as: CN116141456B

Abstract

The invention discloses a PVC sheet surface temperature-adjustable preheating device, which comprises a transverse frame, supporting legs, a box body, guide grooves formed in the transverse frame, an edge sealing strip conveying assembly arranged on the transverse frame and a cutting assembly for cutting edge sealing strips. In this application, before the banding strip preheats, under the effect of electric putter five, the bonding roller contacts with the guide slot, under the effect of lead screw and motor two, the bonding roller removes in the guide slot for the dust scheduling foreign matter in the adhesion guide slot, move down the in-process at four drive link of electric putter, specifically divide into two steps, one, accomplish the position switching of bonding roller and hot plate under the effect of tooth post and ring gear, its two, thimble reciprocating motion, under the effect of thimble and pressure switch, be used for realizing electro-magnet actuation magnetite, be used for accomplishing the separation and the dock once more of adapter sleeve and linking arm tip, compare traditional preheating device, can effectually avoid dust adhesion on the hot melt adhesive, in order to seal the normal banding of banding strip.

Description

PVC sheet surface preheating device that can adjust temperature

Technical Field

The invention relates to the technical field of preheating of edge banding strips, in particular to a PVC sheet surface temperature-adjustable preheating device.

Background

The edge sealing strip is a material for protecting, decorating and beautifying the section of a furniture plate, the main component of the edge sealing strip is polyvinyl chloride, the edge sealing strip is formed by mixing, calendaring, vacuum plastic sucking and other processes, the edge sealing strip is convenient to use, the prior art discloses an edge sealing strip pre-coated with hot melt adhesive, namely, the edge sealing strip is pre-coated with the edge sealing hot melt adhesive at the back, when in edge sealing operation, a heating plate is required to heat the surface of the edge sealing strip under the condition of cold weather, the hot melt adhesive at the back is preheated, and finally hot air is blown out through a hot air device to melt the hot melt adhesive so as to achieve the edge sealing effect.

In actual operation, the hot melt adhesive after preheating has certain viscosity, and foreign matters such as dust on a workbench are adhered to the hot melt adhesive, so that the edge sealing effect of the edge sealing strip is easily affected, and based on the hot melt adhesive, the PVC sheet surface temperature-adjustable preheating device is provided.

Disclosure of Invention

The invention aims at: in order to solve the problems, a PVC sheet surface temperature-adjustable preheating device is provided.

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

the utility model provides a PVC sheet surface adjustable temperature preheating device, includes crossbearer, stabilizer blade, box, guide slot that has on the crossbearer, install banding strip conveying component and the cutting component of cutting banding strip on the crossbearer, install solid fixed ring on the crossbearer, gu the ring gear has been cup jointed to the outside of solid fixed ring, be fixed with dog one and dog two on the outer wall of ring gear, be fixed with two linking arms on the ring gear, have on the crossbearer with linking arm looks adaptation dodge the groove, two all be equipped with the lead screw between linking arm and the ring gear, install on the ring gear drive lead screw pivoted motor two, the screw has the swivel nut of cover at the linking arm outside to be screwed on the lead screw, one of them the swivel nut installs the hot plate through electric push rod five, another the swivel nut installs the bonding roller through electric push rod five;

the transverse frame is provided with a tooth column moving in the vertical direction, the tooth column penetrates through the tooth column, two ends of the moving column are respectively fixed with an upper flange and a lower flange, springs I are arranged between the upper flange and the lower flange and the tooth column, the bottom of the transverse frame is fixed with an electric push rod IV, and the end part of the electric push rod IV is fixed with a connecting frame fixed with the lower flange;

a fluted disc is arranged on the outer wall of the transverse frame, a rack meshed with the fluted disc is fixed on the connecting frame, a thimble moving in the horizontal direction and a pressure switch matched with the thimble are arranged on the outer wall of the transverse frame, and the thimble is connected with the fluted disc through a connecting rod;

the movable block moving in the horizontal direction is arranged in the avoidance groove, a spring III is arranged between the movable block and the inner wall of the avoidance groove, a magnet and a connecting sleeve at the end part of the butt joint connecting arm are fixed on the movable block, and an electromagnet matched with the magnet is fixed on the transverse frame.

Preferably, a driving roller and a second electric push rod are arranged on the transverse frame, and a pressing roller matched with the driving roller is arranged at the end part of the second electric push rod.

Preferably, a bump is fixed in the avoidance groove, and a second guide rod penetrating through the moving block is fixed between the bump and the avoidance groove.

Preferably, the conveying assembly comprises a stand column fixed on a transverse frame, a support is mounted on the stand column, a rotating frame is fixed on the support and provided with a plurality of through grooves, a sliding block and a first guide rod penetrating through the sliding block are arranged in the through grooves, a clamping plate is fixed on the sliding block, and a power piece for driving the sliding block to move is arranged on the back of the rotating frame.

Preferably, the power piece comprises a rotary table arranged at the back of the rotary frame, a plurality of arc grooves are formed in the rotary table, a moving pin penetrating through the arc grooves is fixed on the sliding block, a first motor is fixed on the support, and a gear meshed with the rotary table is arranged on the first motor.

Preferably, the cutting assembly comprises an electric push rod I fixed on a transverse frame, a pressing plate is fixed at the end part of the electric push rod I, a cutting groove is formed in the transverse frame, a cutting mechanism is arranged in the cutting groove, and an electric push rod III for driving the cutting mechanism to move is arranged on the transverse frame.

In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:

in this application, before the banding strip preheats, under the effect of electric putter five, the bonding roller contacts with the guide slot, under the effect of lead screw and motor two, the bonding roller removes in the guide slot for the dust scheduling foreign matter in the adhesion guide slot, move down the in-process at four drive link of electric putter, specifically divide into two steps, one, accomplish the position switching of bonding roller and hot plate under the effect of tooth post and ring gear, its two, thimble reciprocating motion, under the effect of thimble and pressure switch, be used for realizing electro-magnet actuation magnetite, be used for accomplishing the separation and the dock once more of adapter sleeve and linking arm tip, compare traditional preheating device, can effectually avoid dust adhesion on the hot melt adhesive, in order to seal the normal banding of banding strip.

Drawings

Fig. 1 shows a schematic structural diagram of a preheating device according to an embodiment of the present invention;

FIG. 2 shows a schematic view of a turret, a toothed disc, a bracket provided in accordance with an embodiment of the invention;

FIG. 3 illustrates a schematic rear view of a cross frame provided in accordance with an embodiment of the present invention;

FIG. 4 shows a schematic view of a cross frame, a gear ring, a connecting arm and a screw provided in accordance with an embodiment of the present invention;

FIG. 5 shows a schematic view of a cross frame and retaining ring connection provided in accordance with an embodiment of the present invention;

fig. 6 shows a partially enlarged schematic illustration of a in fig. 5 provided in accordance with an embodiment of the invention.

Legend description:

1. a cross frame; 2. a support leg; 3. a column; 4. a case; 5. an electric push rod I; 6. a first stop block; 7. a gear ring; 8. a first guide rod; 9. a slide block; 10. a clamping plate; 11. a rotating frame; 12. a through groove; 13. a guide groove; 14. a bracket; 15. a gear; 16. a first motor; 17. an arc-shaped groove; 18. a moving pin; 19. a screw rod; 20. an electric push rod II; 21. a press roller; 22. a driving roller; 23. a pressing plate; 24. a cutting mechanism; 25. cutting a groove; 26. tooth columns; 27. an electric push rod III; 28. a connecting frame; 29. an electric push rod IV; 30. a rack; 31. fluted disc; 32. a connecting rod; 33. a thimble; 34. a pressure switch; 35. a first spring; 36. an upper flange; 37. a moving column; 38. a heating plate; 39. fifth electric push rod; 40. a connecting arm; 41. sticking a roller; 42. a screw sleeve; 43. a second motor; 44. connecting sleeves; 45. a fixing ring; 46. an avoidance groove; 47. a second guide rod; 48. a moving block; 49. a third spring; 50. a magnet; 51. a bump; 52. a second stop block; 53. an electromagnet; 54. a turntable; 55. and a lower flange.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides a technical solution:

the utility model provides a PVC sheet surface adjustable temperature preheating device, including crossbearer 1, stabilizer blade 2, box 4, the guide slot 13 that has on the crossbearer 1, install banding strip conveying component and the cutting component of cutting banding strip on crossbearer 1, stabilizer blade 2 and box 4 are used for supporting crossbearer 1, guide slot 13 is used for spacing to banding strip, in order to guarantee banding strip to be rectangular form and distribute, install solid fixed ring 45 on the crossbearer 1, gu the outside of solid fixed ring 45 has cup jointed ring gear 7, gu fixed ring 45 passes through the bearing rotation with ring gear 7 and is connected, gu be fixed with dog one 6 and dog two 52 on the outer wall of ring gear 7, dog one 6 and dog two 52 are central symmetry distribution, dog one 6 is used for butt crossbearer 1 lower limb, dog two 52 are used for butt crossbearer 1 upper edge, be fixed with two linking arms 40 on the ring gear 7, two linking arms 40 are L form, two linking arms 40 are central symmetry setting, the transverse frame 1 is provided with an avoidance groove 46 which is matched with the connecting arm 40, the avoidance groove 46 is a rectangular through hole, the avoidance groove 46 is used for avoiding the connecting arm 40 so as to ensure the normal rotation of the connecting arm 40, a screw rod 19 is arranged between the two connecting arms 40 and the gear ring 7, the screw rod 19 is rotationally connected with the end parts of the connecting arm 40 and the protrusions on the gear ring 7 through bearings, the gear ring 7 is provided with a motor II 43 which drives the screw rod 19 to rotate, the motor II 43 is fixed on the protrusions on the gear ring 7, the screw rod 19 is rotationally provided with a screw sleeve 42 which is sleeved outside the connecting arm 40, the screw sleeve 42 is in sliding fit with the connecting arm 40, the screw sleeve 42 can move along the axial direction of the screw rod 19 in the rotating process of the screw rod 19 when the motor II drives the screw rod 19, one screw sleeve 42 is provided with a heating plate 38 through an electric push rod V39, the other screw sleeve 42 is provided with a bonding roller 41 through the electric push rod V39, the electric push rod V39 can drive the heating plate 38 and the bonding roller 41 to move, the adhesive roller 41 is provided with a shell, the adhesive roller 41 rotates on the shell, the shell is fixed at the telescopic end of the electric push rod five 39, the heating temperature of the heating plate 38 is adjustable to adapt to different heating requirements, and the heating plate 38 and the adhesive roller 41 are both direct references in the prior art and are not described in the structure and principle;

the transverse frame 1 is provided with a tooth column 26 moving in the vertical direction, the outer wall of the tooth column 26 is fixedly provided with a latch meshed with the gear ring 7, the tooth column 26 penetrates through the transverse frame 1 and is in sliding fit with the tooth column, the tooth column 26 is penetrated with a moving column 37, the tooth column 26 is in sliding connection with the moving column 37, two ends of the moving column 37 are respectively fixedly provided with an upper flange 36 and a lower flange 55, a first spring 35 is arranged between the upper flange 36 and the lower flange 55 and the tooth column 26, the first spring 35 is sleeved outside the moving column 37, the end part of the first spring 35 is fixedly connected with the tooth column 26, the upper flange 36 and the lower flange 55, the bottom of the transverse frame 1 is fixedly provided with a fourth electric push rod 29, the end part of the fourth electric push rod 29 is fixedly provided with a connecting frame 28 fixed with the lower flange 55, and the fourth electric push rod 29 can drive the lower flange 55, the moving column 37 and the upper flange 36 to move in the vertical direction through the connecting frame 28;

the outer wall of the transverse frame 1 is provided with a fluted disc 31, the fluted disc 31 is rotationally connected with the transverse frame 1 through a shaft body, a rack 30 meshed with the fluted disc 31 is fixed on the connecting frame 28, the fluted disc 31 can rotate in the vertical direction in the moving process of the rack 30, the outer wall of the transverse frame 1 is provided with a thimble 33 moving in the horizontal direction and a pressure switch 34 matched with the thimble 33, the thimble 33 is arranged on the outer wall of the transverse frame 1 through a sliding rail, when the thimble 33 is abutted with the pressure switch 34, the pressure switch 34 is in a closed state, when the thimble 33 is separated from the pressure switch 34, the pressure switch 34 is in an open state, the thimble 33 is connected with the fluted disc 31 through a connecting rod 32, the connecting rod 32 is rotationally connected with the thimble 33 and the fluted disc 31 through the shaft body, the connecting part of the connecting rod 32 and the fluted disc 31 is eccentrically arranged, and the thimble 33 reciprocates in the horizontal direction under the action of the connecting rod 32 in the rotating process of the fluted disc 31;

the movable block 48 is arranged in the avoidance groove 46, the protruding block 51 is fixed in the avoidance groove 46, the guide rod II 47 penetrating through the movable block 48 is fixed between the protruding block 51 and the avoidance groove 46, the movable block 48 is in sliding fit with the guide rod II 47, the spring III 49 is arranged between the movable block 48 and the inner wall of the avoidance groove 46, the magnet 50 and the connecting sleeve 44 at the end part of the butt joint connecting arm 40 are fixed on the movable block 48, the spring III 49 is sleeved outside the guide rod II 47, the spring III 49 gives a thrust to the movable block 48, the movable block 48 is far away from the connecting arm 40 under the thrust, so that the connecting sleeve 44 is separated from the end part of the connecting arm 40, the electromagnet 53 matched with the magnet 50 is fixed on the transverse frame 1, the pressure switch 34 is electrically connected with the electromagnet 53, a loop is formed, the electromagnet 53 is electrified under the closed state, the electromagnet 53 gives a thrust to the magnet 50, the magnet 50 drives the movable block 48 to overcome the elasticity of the spring III 49, so that the connecting sleeve 44 is in butt joint with the connecting arm 40, and the stability of the connecting arm 40 is improved.

Specifically, as shown in fig. 3, a driving roller 22 and a second electric push rod 20 are installed on the transverse frame 1, the driving roller 22 rotates under the action of a driving motor (shown in the figure), a pressing roller 21 matched with the driving roller 22 is installed at the end part of the second electric push rod 20, the edge sealing strip penetrates through the driving roller 22 and the pressing roller 21, the second electric push rod 20 drives the pressing roller 21 to move downwards, the pressing roller 21 and the driving roller 22 clamp the edge sealing strip, and the edge sealing strip can be conveyed in the rotation process of the driving roller 22.

Specifically, as shown in fig. 1 and 2, the conveying component comprises a stand column 3 fixed on a transverse frame 1, a support 14 is mounted on the stand column 3, the support 14 is rotationally connected with the stand column 3 through a shaft body, a rotating frame 11 is fixed on the support 14, the support 14 is fixed with the rotating frame 11 through bolts, the rotating frame 11 is provided with a plurality of through grooves 12, the through grooves 12 are distributed at equal angles around the center of the rotating frame 11, a sliding block 9 and a first guide rod 8 penetrating through the sliding block 9 are arranged in the through grooves 12, the first guide rod 8 is fixed in the through grooves 12, the sliding block 9 is in sliding fit with the first guide rod 8, a clamping plate 10 is fixed on the sliding block 9, the clamping plate 10 is used for fixing a disc-shaped edge sealing strip, and a power piece for driving the sliding block 9 to move is arranged on the back of the rotating frame 11;

the power piece includes the carousel 54 of installing at the carousel 11 back, the carousel 11 passes through the axis body rotation with carousel 54 and is connected, a plurality of arc grooves 17 have on the carousel 54, arc groove 17 and carousel 54 are eccentric setting, be fixed with the removal round pin 18 that runs through arc groove 17 on the slider 9, remove round pin 18 and arc groove 17 sliding fit, be fixed with motor one 16 on the support 14, and install the gear 15 with carousel 54 engaged with on motor one 16, the back of carousel 54 has the latch, the rotation in-process of motor one 16 drive gear 15, under the circumstances of gear 15 and latch engagement, carousel 54 rotates, arc groove 17 is when following carousel 54 rotation, remove round pin 18 and remove at arc groove 17, remove round pin 18 can drive slider 9 and splint 10 fixed edge banding.

Specifically, as shown in fig. 3, the cutting assembly includes an electric push rod one 5 fixed on the transverse frame 1, the electric push rod one 5 is vertically distributed, a pressing plate 23 is fixed at the end of the electric push rod one 5, the electric push rod one 5 can drive the pressing plate 23 to move in the vertical direction, a cutting groove 25 is formed on the transverse frame 1, a cutting mechanism 24 is arranged in the cutting groove 25, the cutting mechanism 24 is in sliding fit with the cutting groove 25, an electric push rod three 27 for driving the cutting mechanism 24 to move is arranged on the transverse frame 1, when the edge banding is cut, the electric push rod one 5 drives the pressing plate 23 to move downwards, the pressing plate 23 clamps the edge banding, the electric push rod three 27 is opened, the electric push rod three 27 drives the cutting mechanism 24 to move in the cutting groove 25, and the cutting mechanism 24 is close to the edge banding and performs cutting treatment on the edge banding.

In summary, before preheating the edge sealing strip provided in this embodiment, the fifth electric push rod 39 is opened, the adhesive roller 41 moves downward, the adhesive roller 41 contacts the inner wall of the guide groove 13, the second motor 43 is turned on, the screw rod 19 rotates, the threaded sleeve 42 moves along the axial direction of the screw rod 19, the adhesive roller 41 moves in the guide groove 13, the adhesive roller 41 adheres to dust in the guide groove 13, cleaning of the inside of the guide groove 13 is completed, and dust adhesion to hot melt adhesive is avoided when the edge sealing strip is preheated;

firstly, placing a disc-shaped edge sealing strip on one side of a rotating frame 11, turning on a first motor 16, rotating a gear 15, driving a rotating disc 54 and an arc-shaped groove 17 formed on the rotating disc 54 to rotate by the gear 15, wherein the arc-shaped groove 17 and the rotating disc 54 are eccentrically arranged, a moving pin 18 moves in the arc-shaped groove 17, and the moving pin 18 drives a sliding block 9 and a clamping plate 10 to move so as to fix the disc-shaped edge sealing strip;

after the reset of the bonding roller 41, one end of the edge banding passes through the pressing roller 21 and the driving roller 22, the electric push rod II 20 is opened, the pressing roller 21 moves downwards, the edge banding is clamped between the pressing roller 21 and the driving roller 22, the driving roller 22 rotates, the edge banding passes through the fixing ring 45 and is conveyed into the guide groove 13, after the conveying of the edge banding is completed, the electric push rod IV 29 is opened, the connecting frame 28 moves upwards, and the two processes are specifically divided:

firstly, the rack 30 moves along with the connecting frame 28, the fluted disc 31 rotates, the thimble 33 is separated from the pressure switch 34 under the action of the connecting rod 32, the electromagnet 53 is powered off, the moving block 48 is given a pushing force under the action of the spring III 49, and the connecting sleeve 44 is separated from the connecting arm 40 so as to facilitate the subsequent rotation of the connecting arm 40;

secondly, in the above process, the first spring 35 at the bottom is excessively changed from the stretching state to the initial state, the first spring 35 at the top is excessively changed from the compressing state to the initial state, the toothed column 26 is in a static state, when the connecting sleeve 44 is separated from the connecting arm 40, the first springs 35 are restored, as the connecting frame 28 moves upwards, the moving column 37, the toothed column 26, the upper flange 36 and the lower flange 55 move upwards, the gear ring 7 rotates, when the first stop block 6 contacts with the lower edge of the transverse frame 1, the bonding roll 41 and the heating plate 38 change positions, the gear ring 7 cannot rotate at this moment, namely, the toothed column 26 is in a static state, the connecting frame 28 continues to move upwards, the first springs 35 at the bottom are changed into a compressing state, the first springs 35 at the top are in a stretching state, when the fluted disc 31 just rotates once, the fourth electric push rod 29 does not drive the connecting frame 28 to move, in this state, the electromagnet 53 is electrified again, the electromagnet 53 gives a repulsive force to the magnet 50, the magnet 50 drives the moving block 48 and the connecting sleeve 44 to move, the connecting sleeve 44 is in butt joint with the end part of the connecting arm 40 again, and the stability of the connecting arm 40 is improved;

finally, the electric push rod five 39 is opened, the heating plate 38 is close to and contacts with the edge sealing strip, and the motor two 43 drives the screw rod 19 to move in the rotating process, so that the preheating operation of the edge sealing strip is completed.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a PVC sheet surface adjustable temperature preheating device, includes crossbearer (1), stabilizer blade (2), box (4), guide slot (13), conveying component and the cutting component of cutting the edge banding strip, its characterized in that, install solid fixed ring (45) on crossbearer (1), guy ring (7) have been cup jointed to the outside of guy ring (45), be fixed with dog one (6) and dog two (52) on the outer wall of guy ring (7), be fixed with two linking arm (40) on guy ring (7), have on crossbearer (1) with linking arm (40) looks adaptation dodge groove (46), two all be equipped with lead screw (19) between linking arm (40) and the guy ring (7), install motor two (43) of driving lead screw (19) pivoted on guy ring (7), guy screw (19) are gone up to be screwed with on guy ring (42) of cover and are established outside linking arm (40), one of them swivel nut (42) installs hot plate (38) through electric push rod five (39), and another swivel joint (42) is through push rod five (41);

the transverse frame (1) is provided with a tooth column (26) moving in the vertical direction, the tooth column (26) is penetrated with a moving column (37), two ends of the moving column (37) are respectively fixed with an upper flange (36) and a lower flange (55), springs I (35) are arranged between the upper flange (36) and the lower flange (55) and the tooth column (26), the bottom of the transverse frame (1) is fixed with an electric push rod IV (29), and the end part of the electric push rod IV (29) is fixed with a connecting frame (28) fixed with the lower flange (55);

a fluted disc (31) is arranged on the outer wall of the transverse frame (1), a rack (30) meshed with the fluted disc (31) is fixed on the connecting frame (28), a thimble (33) moving in the horizontal direction and a pressure switch (34) matched with the thimble (33) are arranged on the outer wall of the transverse frame (1), and the thimble (33) is connected with the fluted disc (31) through a connecting rod (32);

the movable block (48) moving in the horizontal direction is arranged in the avoidance groove (46), a spring III (49) is arranged between the movable block (48) and the inner wall of the avoidance groove (46), a magnet (50) and a connecting sleeve (44) at the end part of the butt joint connecting arm (40) are fixed on the movable block (48), and an electromagnet (53) matched with the magnet (50) is fixed on the transverse frame (1).

2. The PVC sheet surface temperature-adjustable preheating device according to claim 1, wherein the transverse frame (1) is provided with a driving roller (22) and a second electric push rod (20), and the end part of the second electric push rod (20) is provided with a pressing roller (21) matched with the driving roller (22).

3. The PVC sheet surface adjustable temperature preheating device according to claim 2, wherein a bump (51) is fixed in the avoiding groove (46), and a second guide rod (47) penetrating through the moving block (48) is fixed between the bump (51) and the avoiding groove (46).

4. A PVC sheet surface adjustable temperature preheating device according to claim 2 or 3, wherein the conveying assembly comprises a column (3) fixed on a cross frame (1), a bracket (14) is mounted on the column (3), a rotating frame (11) is fixed on the bracket (14), the rotating frame (11) is provided with a plurality of through grooves (12), a sliding block (9) and a first guide rod (8) penetrating the sliding block (9) are arranged in the through grooves (12), a clamping plate (10) is fixed on the sliding block (9), and a power piece for driving the sliding block (9) to move is arranged at the back of the rotating frame (11).

5. The PVC sheet surface temperature adjustable preheating apparatus as claimed in claim 4, wherein the power member includes a turntable (54) mounted on a back of the turntable (11), the turntable (54) has a plurality of arc grooves (17), the slider (9) is fixed with a moving pin (18) penetrating the arc grooves (17), the bracket (14) is fixed with a motor one (16), and the motor one (16) is mounted with a gear (15) engaged with the turntable (54).

6. The PVC sheet surface adjustable temperature preheating device according to claim 1, wherein the cutting assembly comprises an electric push rod I (5) fixed on a transverse frame (1), a pressing plate (23) is fixed at the end part of the electric push rod I (5), a cutting groove (25) is formed in the transverse frame (1), a cutting mechanism (24) is arranged in the cutting groove (25), and an electric push rod III (27) for driving the cutting mechanism (24) to move is arranged on the transverse frame (1).