CN212555095U - Hot melt compounding machine - Google Patents

Abstract

The utility model provides a hot melting compound machine, raw material plates are transported to a position close to a conveying mechanism through a feeding mechanism, the raw material plates are adsorbed and fixed by the conveying mechanism, at the moment, the feeding mechanism resets, a heating mechanism moves to a position between the conveying mechanism and a collecting mechanism, the conveying mechanism and the collecting mechanism on two sides move to the heating mechanism, the heating mechanism heats the plates on the conveying mechanism and the collecting mechanism, the heating mechanism returns after the plates are heated to a required state, the conveying mechanism and the collecting mechanism move close to each other, the plates on the conveying mechanism and the collecting mechanism are bonded, the conveying mechanism returns on the way after the bonding is finished, the collecting mechanism drives semi-finished plates to return, the feeding structure feeds materials again, the process is repeated, the thickness of the plates on the collecting mechanism meets the requirement, the whole structure is compact, and the manufacture of the plates with large thickness is simpler, the manufacturing efficiency is improved, and the popularization is facilitated.

Description

Hot melt compounding machine

Technical Field

The utility model belongs to the technical field of plastics panel processing and specifically relates to a hot melt compounding machine is related to.

Background

The hot-melt compounding machine is a processing machine which carries out hot-melt laminating treatment on plastics, sheets, cloth and the like through heat radiation, combines two or more different materials and applies certain pressure to compound the materials into a whole.

The maximum thickness of the existing hard plastic during processing is 15cm, the difficulty is high if plates with larger thickness are to be produced, therefore, the plates can be produced by a hot-melt compounding method, namely, the side surfaces of the two plates are heated until the surfaces of the plates begin to melt, the two plates are bonded and compounded together, so that the thickness of the plates is increased, if a plurality of plates are required to be bonded, the single plates are required to be sequentially bonded, and the bonded finished plates are required to be conveyed out. The prior art does not have an all-in-one machine for manufacturing thick plates, so that the thickened plates are high in production cost, expensive and not beneficial to popularization.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the weak point of above-mentioned conventional art, provide a simple structure makes convenient hot melt compounding machine.

The purpose of the utility model is achieved through the following technical measures: a hot melt compounding machine is characterized in that: the compound machine comprises

The conveying mechanism is used for conveying materials;

the collecting mechanism is matched with the conveying mechanism and can move towards the direction close to or far away from the conveying mechanism;

the feeding mechanism can enter or exit between the conveying mechanism and the collecting mechanism to place the materials on the conveying mechanism,

the heating mechanism can enter or exit between the conveying mechanism and the collecting mechanism to heat the materials on the conveying mechanism and the collecting mechanism.

As a preferred scheme, the conveying mechanism comprises a first support and a second support, the first support is connected with a first power device for driving the first support to move along a first sliding rail, the second support is connected with a second power device for driving the second support to slide along the first sliding rail, the second power device is fixed on the first support, and a first vacuum box is arranged on the second support.

As a preferable scheme, the second power device is an oil cylinder, the first power device is a second motor, an output end of the second motor is connected with a screw rod, and a nut seat matched with the screw rod is fixedly connected to the second support.

As a preferable scheme, the collecting mechanism comprises a third support, a second vacuum box is arranged on one side, close to the conveying mechanism, of the third support, the third support slides along a second sliding rail, and the third support is connected with a third power device for driving the third support to slide.

Preferably, the third power device is a fourth motor, and the fourth motor drives the third support to slide along the second slide rail through a third gear and a third rack which are matched with each other.

As an optimal scheme, second vacuum chamber downside is equipped with the mounting bracket, the upside of mounting bracket is connected with the roller bearing through the mounting groove, the roller bearing is equipped with a plurality ofly, and is a plurality of the roller bearing is arranged along the slip direction of second slide rail, the roll direction of roller bearing is parallel with the slip direction of second slide rail, the mounting bracket is in the below of roller bearing still is equipped with the backup pad, the backup pad is equipped with a plurality ofly, and is a plurality of the slip direction align to grid of second slide rail is followed to the backup pad, every all be equipped with the second cylinder in the backup pad, the output fixedly connected with mounting panel of second cylinder, be equipped with rotatable gyro wheel on the mounting panel, the roll direction of gyro wheel is perpendicular with the roll direction of roller bearing, the gyro wheel.

As a preferred scheme, the supporting plate is further provided with a guide sleeve, the mounting plate is provided with a guide rod matched with the guide sleeve, when the cylinder drives the roller to move upwards, the highest position of the roller is higher than the highest position of the roller, and when the cylinder drives the roller to move downwards, the highest position of the roller is lower than the highest position of the roller.

As a preferred scheme, feed mechanism includes the feeding fixed plate, the feeding fixed plate passes through its motion along the fourth slide rail of fifth power device drive, and fifth power device is first motor, and first motor is connected with the first gear and the first rack of mutually supporting, still there is the cushion socket through spring coupling on the feeding fixed plate, the lower extreme of feeding fixed plate still is equipped with the guide holder, the second connecting plate be equipped with guide holder complex guiding axle.

As a preferable scheme, a first cylinder is fixedly connected to the first connecting plate, a pressing plate is fixedly connected to an output end of the first cylinder, the pressing plate can be close to or far away from the feeding fixing plate, and the pressing plate is arranged on one side of the feeding fixing plate.

As a preferable scheme, the heating mechanism comprises a heating plate, the heating plate slides along a third slide rail through a third power mechanism, the fourth power mechanism is a third motor, and the third motor is connected with the heating plate through a second rack and a second gear which are matched with each other.

Owing to adopted above-mentioned technical scheme, compare with prior art, the utility model has the advantages that: the utility model provides a hot melting compound machine, raw material plates are transported to a position close to a conveying mechanism through a feeding mechanism, the raw material plates are adsorbed and fixed by the conveying mechanism, at the moment, the feeding mechanism resets, a heating mechanism moves to a position between the conveying mechanism and a collecting mechanism, the conveying mechanism and the collecting mechanism on two sides move to the heating mechanism, the heating mechanism heats the plates on the conveying mechanism and the collecting mechanism, the heating mechanism returns after the plates are heated to a required state, the conveying mechanism and the collecting mechanism move close to each other, the plates on the conveying mechanism and the collecting mechanism are bonded, the conveying mechanism returns on the way after the bonding is finished, the collecting mechanism drives semi-finished plates to return, the feeding structure feeds materials again, the process is repeated, the thickness of the plates on the collecting mechanism meets the requirement, the whole structure is compact, and the manufacture of the plates with large thickness is simpler, the manufacturing efficiency is improved, and the popularization is facilitated.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is an overall structure schematic diagram of the hot melt compound machine of the present invention.

Fig. 2 is a schematic structural diagram of one side of a feeding mechanism of the hot melt compound machine of the present invention.

Fig. 3 is a schematic diagram of another side structure of a feeding mechanism of the hot melt compound machine of the present invention.

Fig. 4 is a schematic structural view of a conveying mechanism of the hot melt compound machine of the present invention.

Fig. 5 is a schematic structural view of a first vacuum box of the hot melt compounding machine of the present invention.

Fig. 6 is a schematic side view of a heating mechanism of a hot melt compound machine of the present invention.

Fig. 7 is a schematic view of another side structure of a heating mechanism of the hot melt compound machine of the present invention.

Fig. 8 is a schematic structural view of a collecting mechanism of the hot melt compound machine of the present invention.

Fig. 9 is a schematic view of a supporting plate structure of the hot melt compound machine of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example (b): as shown in fig. 1 to 9, a hot melt laminating machine comprises a conveying mechanism 1 and a collecting mechanism 2 which can be close to or far away from each other, a feeding mechanism 4 which is close to or far away from the conveying mechanism 1, and a heating mechanism 3 which is arranged between the conveying mechanism 1 and the collecting mechanism 2 and is used for heating a plate. Feeding mechanism 4 transports raw and other materials panel to and is close to conveying mechanism 1 department, it is fixed with raw and other materials panel absorption by conveying mechanism 1, feeding mechanism 4 resets this moment, heating mechanism 3 moves to between conveying mechanism 1 and receiving mechanism 2, conveying mechanism 1 and receiving mechanism 2 of both sides move to heating mechanism 3, heating mechanism 3 heats the panel on conveying mechanism 1 and receiving mechanism 2, heating mechanism 3 returns after heating panel to required state, conveying mechanism 1 and receiving mechanism 2 are close to the motion mutually, make the panel on conveying mechanism 1 and receiving mechanism 2 realize bonding, conveying mechanism 1 returns on the way after the bonding is accomplished, receiving mechanism 2 drives semi-finished product panel and returns, the pay-off once more of pay-off structure, the process is repeated, until the panel thickness on receiving mechanism 2 reaches the requirement, panel processing is accomplished this moment. In this embodiment, the heating mechanism 3 heats the plates on both sides, so that the initial plates are placed on the collecting mechanism 2, the plates to be bonded are placed on the feeding mechanism 4 to reach the conveying mechanism 1, the plates to be bonded are heated by the heating mechanism 3, and finally the bonded plates are combined together.

Still include frame 5, be equipped with on the frame 5 with be used for the first slide rail of conveying mechanism 1 direction, be used for the second slide rail of receiving mechanism 2 direction, be used for the third slide rail of heating mechanism 3 direction and be used for the fourth slide rail of feeding mechanism 4 direction. The conveying mechanism 1 is connected with a first power device and a second power device for driving the conveying mechanism to reciprocate, the collecting mechanism 2 is connected with a third power device for driving the collecting mechanism to reciprocate, the heating mechanism 3 is connected with a fourth power device for driving the heating mechanism to reciprocate, and the feeding mechanism 4 is connected with a fifth power device for driving the feeding mechanism to reciprocate. The first power device and the second power device drive the conveying mechanism 1 to slide along the first slide rail, the third power device drives the collecting mechanism 2 to slide along the second slide rail, the fourth power device drives the heating mechanism 3 to slide along the third slide rail, and the fourth power device drives the feeding mechanism 4 to slide along the fourth slide rail. In this embodiment, as shown in fig. 1, whole frame 5 is whole to be cross, feed mechanism 4 and heating mechanism 3 set up the both ends at frame 5 relatively respectively, conveying mechanism 1 and harvesting mechanism 2 set up the other both ends at frame 5 relatively respectively, be provided with processing station 6 in the middle of the cross frame 5, corresponding first slide rail and second slide rail parallel arrangement, third slide rail and fourth slide rail parallel arrangement, first slide rail, the second slide rail, third slide rail and fourth slide rail all set up towards processing station 6, and thus, make the volume of whole frame 5 reduce, the space has been practiced thrift, and the motion route of each mechanism shortens, be favorable to improving machining efficiency.

In this embodiment, the rack 5 is further provided with a controller 7, and the controller 7 is programmed by a PLC, so that each mechanism operates in sequence according to a program.

As shown in fig. 2-3, the feeding mechanism 4 includes a feeding fixing plate 8, the upper end and the lower end of the feeding fixing plate 8 are both connected to the frame 5 through a fourth slide rail 12, the upper end of the feeding fixing plate 8 is provided with a first connecting plate 9, the lower end of the feeding fixing plate 8 is provided with a second connecting plate 10, the first connecting plate 9 and the second connecting plate 10 are both provided with fourth sliders matching with the fourth slide rails 12 respectively connected thereto, the second connecting plate 10 is fixedly provided with a first rack, the frame 5 is provided with a first motor 11, in this embodiment, a fifth power device is the first motor 11, the first motor 11 is connected to the first rack through a first gear, the first rack is parallel to the fourth slide rail 12, the first connecting plate 9 and the second connecting plate 10 are both provided with a buffer seat 17, the buffer seat 17 is connected to the feeding fixing plate 8 through a spring 18, the lower end of the feeding fixing plate 8 is also provided with a guide seat 13, and the second connecting plate 10 is provided with a guide shaft 14 matched with the guide seat 13.

The first connecting plate 9 is fixedly connected with a first air cylinder 15, the output end of the first air cylinder 15 is fixedly connected with a pressure plate 16, the pressure plate 16 can be close to or far away from the feeding fixing plate 8, and the pressure plate 16 is arranged on one side of the feeding fixing plate 8. In this embodiment, clamp plate 16 sets up in feeding fixed plate 8 towards one side of conveying mechanism 1, thus, the one side that is equipped with clamp plate 16 is installed to the panel of being conveyed, clamp plate 16 is the plane towards the one side of panel, place panel parallel on feeding fixed plate 8, the lower extreme is placed on guide holder 13, two first cylinders 15 of upper end drive clamp plate 16 downstream simultaneously, until compressing tightly panel, first motor 11 drives feeding fixed plate 8 and moves to processing position 6, move to processing position 6 after, conveying mechanism 1 takes away panel, can produce certain impact force to feeding fixed plate 8 this moment, buffer seat 17 is all installed to four angles of feeding fixed plate 8, spring 18 can give the buffering, thereby protect feeding fixed plate 8 not damaged, and service life is prolonged.

As shown in fig. 4-5, the conveying mechanism 1 includes a first support 19 and a second support 20, the first support 19 and the second support 20 are respectively connected to the frame 5 through a first slide rail 22, in this embodiment, two sets of the first slide rails 22 are provided, one set is located below the first support 19, the other set is located below the second support 20, the first support 19 is disposed on one side of the second support 20 away from the collecting mechanism 2, a first vacuum box 21 is disposed on one side of the second support 20 close to the collecting mechanism 2, first slide rods 23 parallel to the first slide rails 22 and sliding along the first slide rails 22 are disposed at two ends of the second support 20, and the first support 19 is disposed between the two first slide rods 23. The first support 19 is connected with a first power device for driving the first support to move along a first sliding rail, the second supports 20 are both connected with second power devices for driving the second support to slide along the first sliding rail, the second power devices are fixed on the first supports, and the second supports 20 are provided with first vacuum boxes 21. The second power device is an oil cylinder, the first power device is a second motor, an oil cylinder 24 is fixedly arranged on the first support 19, the output end of the oil cylinder 24 is fixedly connected with the second support 20, the second support 20 is connected with a second motor 26 which drives the second support to slide along the first slide rail 22, the output end of the second motor 26 is connected with a screw rod 25, and a nut seat matched with the screw rod 25 is fixedly connected onto the second support 20.

The first vacuum box 21 is connected with a vacuum machine, and a plurality of first adsorption holes are arranged at one side close to the processing station 6 and used for adsorbing the plate.

In this embodiment, after the feeding mechanism 4 conveys the board to the processing position 6, the second motor 26 drives the first support 19 and the first support 19 to move towards the processing position 6 at the same time, the first vacuum box 21 does not reach the board, the second motor 26 stops, the oil cylinder 24 is restarted at this time, the second support 20 is driven to continue to move until the first vacuum box 21 moves to the board, the first vacuum box 21 adsorbs the board, the feeding mechanism exits, the heating mechanism 3 moves to the processing position 6 to heat the board, after the heating is completed, the oil cylinder 24 continues to move forward until the board is adhered to the board on the collecting mechanism 2, and the oil cylinder 24 drives the first vacuum box 21 to return again to complete the conveying.

As shown in fig. 6-7, the heating mechanism 3 includes a heating plate 27, the upper and lower ends of the heating plate 27 are connected to the frame 5 through third sliding rails 28, a third connecting plate 29 is disposed at the upper end of the heating plate 27, a fourth connecting plate 30 is disposed at the lower end of the heating plate 27, fourth sliding blocks matched with the third sliding rails 28 connected to each other are disposed on the third connecting plate 29 and the fourth connecting plate 30, a second rack is disposed on the fourth connecting plate 30, a third motor 31 is disposed on the frame 5, and the third motor 31 is connected to the second rack through a second gear.

In this embodiment, the fourth power device is a third motor 31, the third motor 31 drives the heating plate 27 to move to the processing position 6 along the third slide rail 28 through the second gear and the second gear, the heating plate 27 is internally provided with a plurality of heating pipes, and the outer layer of the heating plate 27 is made of a metal material with good thermal conductivity, which may be aluminum or copper.

As shown in fig. 8-9, the collecting mechanism 2 comprises a third support 32, a second vacuum box 33 is arranged on one side of the third support 32 close to the conveying mechanism 1, second sliding rods 35 sliding along second sliding rails 34 are arranged on two sides of the third bracket 32, the second sliding rod 35 is provided with a fourth motor 36 and a third gear fixedly connected with the fourth motor 36, in this embodiment, the third power device is the fourth motor 36, a third rack 37 parallel to the second slide rail 34 is arranged on the frame 5, the third gear and the third rack 37 are arranged in a matching way, a mounting rack 38 is further arranged between the second sliding rods 35, a roller 39 is connected to the upper side of the mounting rack 38 through a mounting groove, the plurality of rollers 39 are arranged along the sliding direction of the second slide rail 34, and the highest position of the roller 39 is located below the second vacuum box 33.

The mounting bracket 38 is further provided with a plurality of supporting plates 40 below the roller 39, the supporting plates 40 are provided with a plurality of supporting plates 40 which are uniformly arranged along the sliding direction of the second slide rail 34, in this embodiment, the number of the supporting plates 40 is four, each supporting plate 40 is provided with a second cylinder 41, the output end of each second cylinder 41 is fixedly connected with a mounting plate 42, the mounting plate 42 is provided with a rotatable roller 43, the roller 43 is provided with a plurality of rollers 43 which are arranged along the direction perpendicular to the second slide rail 34 and rotate along the direction perpendicular to the second slide rail 34, the supporting plate 40 is further provided with a guide sleeve 44, the mounting plate 42 is provided with a guide rod matched with the guide sleeve 44, when the cylinder drives the roller 43 to move upwards, the highest position reached by the roller 43 is higher than the highest position of the roller 39, and when the cylinder drives the roller 43 to move downwards, the highest position of the roller 43 is lower than the highest position of the roller 39.

The fourth motor 36 rotates to drive the third gear to rotate along the third rack 37, so as to realize the sliding of the third support 32 and drive the second vacuum box 33 to slide.

The second vacuum box 33 is also connected to a vacuum machine, and a plurality of second adsorption holes are formed at one side close to the processing station 6 for adsorbing the plate. When the second vacuum box 33 adsorbs the plate, the plate needs to move along the roller 39 under the driving of the second vacuum box 33, at this time, the cylinder drives the roller 43 to reach the lowest position, the plate does not contact the roller 43, the plate adsorbed on the second vacuum box 33 moves to the processing position 6 under the driving of the fourth motor 36, the heating plate heats one side of the plate close to the processing position 6, the heating plate is heated, the heating plate is withdrawn, the conveying mechanism 1 conveys the plate on the first vacuum box to the second vacuum box 33 to bond the plate, at this time, the control system controls the fourth motor 36 to rotate, so that the second vacuum box 33 moves to the direction far away from the processing position 6 by the thickness of one plate, thus, the plate which is just bonded does not affect the bonding of the subsequent plates, the plate sequentially reciprocates until the thickness of the plate reaches the required thickness, the plate processing is completed, and the four second cylinders 41 move simultaneously, the mounting plate 42 is pushed to move upwards to push the roller 43 to the highest position, the maximum height of the roller 43 is higher than that of the roller 39 at the moment, the roller 43 jacks up the plate on the roller 39, the plate is completely supported by the roller 43, and the processed plate is pushed along the rolling direction of the roller 43 at the moment to be taken down.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A hot melt compounding machine is characterized in that: the compound machine comprises

The conveying mechanism is used for conveying materials;

the collecting mechanism is matched with the conveying mechanism and can move towards the direction close to or far away from the conveying mechanism;

the feeding mechanism can enter or exit between the conveying mechanism and the collecting mechanism to place the materials on the conveying mechanism,

the heating mechanism can enter or exit between the conveying mechanism and the collecting mechanism to heat the materials on the conveying mechanism and the collecting mechanism.

2. A heat-melt compounding machine according to claim 1, wherein: conveying mechanism includes first support and second support, first support is connected with its first power device along the motion of first slide rail of drive, the second support all is connected with its gliding second power device along first slide rail of drive, the second power device is fixed on first support, be equipped with first vacuum box on the second support.

3. A heat-melt compounding machine according to claim 2, wherein: the second power device is an oil cylinder, the first power device is a second motor, the output end of the second motor is connected with a screw rod, and a nut seat matched with the screw rod is fixedly connected to the second support.

4. A heat-melt compounding machine according to claim 1, wherein: the collecting mechanism comprises a third support, a second vacuum box is arranged on one side, close to the conveying mechanism, of the third support, the third support slides along a second sliding rail, and the third support is connected with a third power device for driving the third support to slide.

5. A heat-melt compounding machine according to claim 4, wherein: the third power device is a fourth motor, and the fourth motor drives the third support to slide along the second sliding rail through a third gear and a third rack which are matched with each other.

6. A heat-melt compounding machine according to claim 5, wherein: the utility model discloses a vacuum box, including first vacuum box, second vacuum box, mounting bracket, roller bearing, backup pad, second cylinder, output fixedly connected with mounting panel, the vacuum box downside of second is equipped with the mounting bracket, the upside of mounting bracket is connected with the roller bearing through the mounting groove, the roller bearing is equipped with a plurality ofly, and is a plurality of the slip direction of second slide rail is arranged along the roller bearing, the roll direction of roller bearing is parallel with the slip direction of second slide rail, the mounting bracket is in the below of roller bearing still is equipped with the backup pad, the backup pad is equipped with a plurality ofly, and is a plurality ofly the slip direction align to grid of second slide rail is followed to the backup pad, every all be equipped with the second cylinder in the backup.

7. A heat-melt compounding machine according to claim 6, wherein: still be equipped with the uide bushing in the backup pad, be equipped with on the mounting panel with uide bushing complex guide bar, when the cylinder drives the gyro wheel upward movement, the highest position that the gyro wheel reached is higher than the highest position of roller bearing, when the cylinder drives the gyro wheel downward movement, the highest position of gyro wheel is less than the highest position of roller bearing.

8. A heat-melt compounding machine according to claim 1, wherein: the feeding mechanism comprises a feeding fixing plate, the feeding fixing plate is driven to move along a fourth sliding rail through a fifth power device, the fifth power device is a first motor, the first motor is connected with a first gear and a first rack which are matched with each other, the feeding fixing plate is further connected with a buffer seat through a spring, the lower end of the feeding fixing plate is further provided with a guide seat, and a second connecting plate is provided with a guide shaft matched with the guide seat.

9. A heat-melt compounding machine according to claim 8, wherein: the feeding device comprises a feeding fixing plate, a first connecting plate and a pressing plate, wherein the feeding fixing plate is arranged on the feeding fixing plate, the first connecting plate is fixedly connected with a first air cylinder, the output end of the first air cylinder is fixedly connected with the pressing plate, the pressing plate can be close to or far away from the feeding fixing plate, and the pressing plate is arranged on one side of the feeding fixing plate.

10. A heat fusion compound machine as claimed in one of claims 1 to 9, characterized in that: the heating mechanism comprises a heating plate, the heating plate slides along a third sliding rail through a fourth power device, the fourth power device is a third motor, and the third motor is connected with the heating plate through a second rack and a second gear which are matched with each other.

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