CN217704695U - Polyester film stretching tool - Google Patents

Abstract

The utility model relates to the technical field of polyester film stretching detection, in particular to a polyester film stretching tool which has high working efficiency, convenient use, high practicability and reliability; the device comprises a lifting device, a support plate, a support box, a heating plate, electric wires, a transverse movement mechanism, a longitudinal movement mechanism, a driving device and four groups of clamping devices, wherein the support plate is fixedly arranged on the lifting device, the support box is fixedly arranged on the support plate, the heating plate is fixedly arranged on the support box, the electric wires are arranged on the heating plate, the input end of the heating plate is connected with the output end of the electric wires, the transverse movement mechanism is transversely arranged at the left part and the right part of the support plate, the longitudinal movement mechanism is longitudinally arranged at the front part and the rear part of the support plate, the four groups of clamping devices are respectively arranged at the left part and the right part of the transverse movement mechanism and the front part and the rear part of the longitudinal movement mechanism, the driving device is arranged on the support plate, and the driving device is used for driving the movement of the transverse movement mechanism and the longitudinal movement mechanism.

Description

Polyester film stretching tool

Technical Field

The utility model relates to a technical field that the polyester film is tensile to be detected especially relates to a polyester film tensile frock.

Background

The polyester film (PET) is a film material which is prepared by using polyethylene terephthalate as a raw material, preparing a thick sheet by an extrusion method and stretching the thick sheet. The polyester film stretching tool is a device for detecting the ductility of the polyester film, and is widely applied to the field of polyester film detection. The existing polyester film stretching tool finds that the existing polyester film stretching tool can only transversely stretch the polyester film, cannot simultaneously detect the transverse ductility and the longitudinal ductility of the polyester film, and is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a ductility that not only can detect polyester film vertically and two horizontal directions simultaneously, can detect polyester film ductility under different temperatures moreover, the limitation is low, and work efficiency is high, convenient to use, the tensile frock of polyester film that practicality and reliability are high.

The utility model discloses a polyester film stretching tool, including elevating gear, the extension board, a case, the hot plate, the electric wire, transverse motion mechanism, longitudinal motion mechanism, drive arrangement and four groups clamping device, extension board fixed mounting is on elevating gear, a case fixed mounting is on the extension board, the hot plate fixed mounting is on a case, be provided with the electric wire on the hot plate, the input of hot plate is connected with the output of electric wire, transverse motion mechanism transversely installs two parts on the left and right sides of extension board, longitudinal motion mechanism longitudinally installs two parts on the front and back of extension board, four groups clamping device install two parts on the left and right sides of transverse motion mechanism and two parts on the front and back of longitudinal motion mechanism respectively, drive arrangement installs on the extension board, drive arrangement is used for driving the motion of transverse motion mechanism and longitudinal motion mechanism; the clamping device comprises a clamping plate, a pressing plate, a screw rod and a bearing, wherein the pressing plate is vertically and slidably arranged on the clamping plate, the screw rod and the clamping plate are screwed, the lower end of the screw rod is rotatably arranged on the bearing, and the bearing is fixedly arranged at the upper end of the pressing plate; firstly, respectively placing the front, the rear, the left and the right of a polyester film to be detected on four groups of clamping plates, enabling the polyester film to be positioned above a heating plate, then rotating four groups of screw rods, driving the four groups of pressing plates to descend through four groups of bearings until the four groups of pressing plates are tightly attached to the upper end of the polyester film, enabling the polyester film to be pressed on the four groups of clamping plates by the four groups of pressing plates, then connecting electric wires with an external power supply, then enabling the heating plate to start heating, enabling the polyester film to be heated up through radiation by the heating plate until the polyester film is heated to a specified temperature, then turning off the external power supply, then turning on a driving device, enabling a transverse movement mechanism to drive the left group of clamping plates and the right group of clamping plates to be away from each other, enabling the front group of clamping plates and the rear group of clamping plates to be driven to be away from each other by a longitudinal movement mechanism, enabling the polyester film to be longitudinally stretched while being transversely stretched, and enabling the ductility of the polyester film to be inferred by detecting the distance between the four groups of clamping plates immediately after the polyester film is cut; because polyester film is when detecting, it can transversely stretch when vertical tensile, so can detect the ductility of polyester film vertical and two horizontal directions simultaneously, convenient to use has improved work efficiency, can heat polyester film through the hot plate moreover, so can detect the ductility of polyester film under different temperatures, reduced the limitation in the use, practicality and reliability height.

Preferably, the transverse movement mechanism comprises four groups of first slide rails, four groups of first slide blocks, two groups of first driving blocks, two groups of first fixing plates, two groups of first screw rods and two groups of first cone pulleys, the two groups of first slide rails are fixedly installed at the left part and the right part of the support plate, the four groups of first slide blocks are respectively installed on the four groups of first slide rails in a left-right sliding mode, the two groups of clamping plates are respectively fixedly installed on the four groups of first slide blocks, the one group of clamping plates are fixedly installed on the two groups of first slide blocks, the two groups of first driving blocks are respectively fixedly installed at the lower ends of the two groups of clamping plates, the two groups of first fixing plates are respectively fixedly installed at the left part and the right part of the support plate, the two groups of first screw rods are respectively rotatably installed on the two groups of first fixing plates, the two groups of first screw rods are respectively and spirally installed on the support box, and the two groups of first cone pulleys are respectively and fixedly installed on the two groups of first screw rods; the driving device is opened, the driving device drives the two groups of first screw rods to rotate through the longitudinal movement device, the rotating directions of the two groups of first screw rods are opposite, and the two groups of rotating first screw rods enable the polyester film to be transversely stretched through the two groups of clamping plates on the left side and the right side, so that the detection on the transverse ductility of the polyester film is facilitated, and the convenience is improved.

Preferably, the longitudinal movement mechanism comprises four groups of second slide rails, four groups of second slide blocks, two groups of second drive blocks, two groups of second screw rods, two groups of second cone pulleys and two groups of second fixed plates, the four groups of second slide rails are respectively fixedly arranged at the front and rear parts of the support plate, the four groups of second slide blocks are respectively slidably arranged on the four groups of second slide rails front and rear, two groups of clamping plates at the front and rear sides are respectively fixedly arranged at the upper ends of the four groups of second slide blocks, one group of clamping plates are fixedly arranged at the upper ends of the two groups of second slide blocks, two groups of second drive blocks are respectively fixedly arranged at the lower ends of the two groups of clamping plates at the front and rear sides, the two groups of second drive blocks are respectively screwed with the two groups of second screw rods, the two groups of second screw rods are respectively rotatably arranged on the two groups of second fixed plates, the two groups of second fixed plates are respectively fixedly arranged at the front and rear parts of the support plate, the two groups of second cone pulleys are respectively fixedly arranged on the two groups of second screw rods, and the two groups of second cone pulleys are respectively meshed with the two groups of first cone pulleys; open drive arrangement, it is rotatory that drive arrangement drives the second lead screw of front side, the second lead screw of front side makes two sets of first cones rotatory through the second cone pulley of front side, two sets of first cones drive the second cone pulley of rear side rotatory, and the direction of rotation of two sets of second cones is opposite, the direction of rotation of two sets of first cones is opposite, later two sets of second cones drive two sets of second drive blocks through two sets of second lead screws and keep away from each other, two sets of splint of both sides keep away from each other around two sets of second drive blocks drive, make the polyester film by around the tensile can of two sets of splint of both sides, the convenience is to the longitudinal stretching of polyester film, the convenience in the use has been improved.

Preferably, the driving device comprises a driving motor, the driving motor is fixedly arranged at the upper end of the support plate, and the output end of the driving motor is connected with the front end of the front second screw rod; the driving motor is started, and the driving motor drives the second screw rod on the front side to rotate, so that the rotation of the second screw rod on the front side is facilitated, and the convenience is improved.

Preferably, the lifting device comprises a fixed frame, a double-shaft motor, two groups of driving shafts, two groups of supporting plates, two groups of driving conical wheels, two groups of driven conical wheels, two groups of third screw rods and two groups of sliding blocks, wherein the double-shaft motor is fixedly arranged on the fixed frame, the input ends of the two groups of driving shafts are respectively connected with the two groups of output ends of the double-shaft motor, the two groups of driving shafts are respectively rotatably arranged on the two groups of supporting plates, the two groups of supporting plates are respectively fixedly arranged on the two groups of driving shafts, the two groups of driving conical wheels are respectively engaged with the two groups of driven conical wheels, the two groups of third screw rods are respectively and fixedly arranged at the upper ends of the two groups of driven conical wheels, the two groups of third screw rods are respectively and spirally arranged with the two groups of sliding blocks, the two groups of sliding blocks are respectively and vertically and slidably arranged on the left part and the right part of the fixed frame, and the two groups of third screw rods are respectively and rotatably arranged on the left part and the right part of the fixed frame; open the biax motor, the biax motor drives two sets of drive cone pulleys through two sets of drive shafts and rotates, and two sets of drive cone pulleys drive two sets of third lead screws synchronous revolution through two sets of driven cone pulleys, and two sets of backup pads of rotation make the extension board rise through two sets of sliding blocks, to the extension board rise to be fit for the height of workman's operation can, its height that can adjust the extension board according to workman's height has improved the convenience, has made things convenient for the workman to operate.

Preferably, the device also comprises two groups of limiting blocks, wherein the two groups of limiting blocks are respectively and fixedly arranged at the upper ends of the two groups of third screw rods; through the setting, the two sets of sliding blocks are prevented from moving in an overtravel way, and the reliability in the using process is improved.

Preferably, the fixing frame is provided with an antirust coating; through the arrangement, the service life of the fixing frame is prolonged.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, respectively placing the front, the rear, the left and the right of a polyester film to be detected on four groups of clamping plates, enabling the polyester film to be positioned above a heating plate, then rotating four groups of screws, driving the four groups of pressing plates to descend through four groups of bearings until the four groups of pressing plates are tightly attached to the upper end of the polyester film, enabling the polyester film to be pressed on the four groups of clamping plates by the four groups of pressing plates, then connecting an electric wire with an external power supply, enabling the heating plate to heat up the polyester film through radiation, heating the polyester film to a specified temperature by the heating plate, then turning off the external power supply, then turning on a driving device, enabling a transverse movement mechanism to drive the left clamping plate and the right clamping plate to be away from each other, enabling a longitudinal movement mechanism to drive the front clamping plate and the rear clamping plate to be away from each other, enabling the polyester film to be longitudinally stretched while being transversely stretched, and enabling the ductility of the polyester film to be deduced by detecting the distance between the four groups of clamping plates after the polyester film is just cut; because polyester film is when detecting, it can transversely stretch when vertical tensile, so can detect the ductility of polyester film vertical and two horizontal directions simultaneously, convenient to use has improved work efficiency, can heat polyester film through the hot plate moreover, so can detect the ductility of polyester film under different temperatures, reduced the limitation in the use, practicality and reliability height.

Drawings

FIG. 1 is a schematic view of the structure of a pallet, branch box and clamping plate;

FIG. 2 is a schematic view of the longitudinal movement mechanism;

fig. 3 is a schematic front view of the present invention;

FIG. 4 is a schematic top view of the support plate, branch box and clamping plate;

FIG. 5 is a schematic view of the structure of the clamping device;

fig. 6 is a schematic view of the structure of the branch box, the heating plate and the electric wire.

In the drawings, the reference numbers: 1. a support plate; 2. supporting a box; 3. heating plates; 4. an electric wire; 5. a splint; 6. pressing a plate; 7. a screw; 8. a bearing; 9. a first slide rail; 10. a first slider; 11. a first driving block; 12. a first fixing plate; 13. a first lead screw; 14. a first cone pulley; 15. a second slide rail; 16. a second slider; 17. a second driving block; 18. a second lead screw; 19. a second cone; 20. a second fixing plate; 21. a drive motor; 22. a fixing frame; 23. a dual-axis motor; 24. a drive shaft; 25. a support plate; 26. driving the cone pulley; 27. a driven cone pulley; 28. a third screw rod; 29. a slider; 30. and a limiting block.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The supporting box 2 is fixedly arranged on the supporting plate 1, the heating plate 3 is fixedly arranged on the supporting box 2, the heating plate 3 is provided with an electric wire 4, the input end of the heating plate 3 is connected with the output end of the electric wire 4, the transverse movement mechanism is transversely arranged at the left part and the right part of the supporting plate 1, the longitudinal movement mechanism is longitudinally arranged at the front part and the rear part of the supporting plate 1, and the four groups of clamping devices are respectively arranged at the left part and the right part of the transverse movement mechanism and the front part and the rear part of the longitudinal movement mechanism; the clamping device comprises a clamping plate 5, a clamping plate 6, a screw rod 7 and a bearing 8, wherein the clamping plate 6 is arranged on the clamping plate 5 in a vertical sliding manner, the screw rod 7 is in screw assembly with the clamping plate 5, the lower end of the screw rod 7 is rotatably arranged on the bearing 8, the bearing 8 is fixedly arranged at the upper end of the clamping plate 6, the transverse movement mechanism comprises four groups of first slide rails 9, four groups of first slide blocks 10, two groups of first driving blocks 11, two groups of first fixing plates 12, two groups of first screw rods 13 and two groups of first cone pulleys 14, two groups of first slide rails 9 are fixedly arranged at the left part and the right part of the support plate 1, the four groups of first slide blocks 10 are respectively arranged on the four groups of first slide rails 9 in a vertical sliding manner, the two groups of clamping plates 5 are respectively and fixedly arranged on the four groups of first slide blocks 10, the one group of clamping plate 5 is fixedly arranged on the two groups of first slide blocks 10, and the two groups of first driving blocks 11 are respectively and fixedly arranged at the lower ends of the two groups of clamping plates 5, two groups of first fixing plates 12 are respectively and fixedly arranged at the left part and the right part of a support plate 1, two groups of first screw rods 13 are respectively and rotatably arranged on the two groups of first fixing plates 12, two groups of first screw rods 13 are respectively and rotatably arranged on a support box 2, two groups of first screw rods 13 are respectively and spirally arranged with two groups of first driving blocks 11, two groups of first cone pulleys 14 are respectively and fixedly arranged on two groups of first screw rods 13, the longitudinal movement mechanism comprises four groups of second slide rails 15, four groups of second slide blocks 16, two groups of second driving blocks 17, two groups of second screw rods 18, two groups of second cone pulleys 19 and two groups of second fixing plates 20, four groups of second slide rails 15 are respectively and fixedly arranged at the front part and the rear part of the support plate 1, four groups of second slide blocks 16 are respectively and forwardly and rearwardly and slidably arranged on the four groups of second slide rails 15, two groups of clamping plates 5 at the front side and the rear side are respectively and fixedly arranged at the upper ends of the four groups of second slide blocks 16, one group of clamping plates 5 are fixedly arranged at the upper ends of the two groups of second slide blocks 16, two groups of second driving blocks 17 are respectively and fixedly arranged at the lower ends of two groups of clamping plates 5 at the front side and the rear side, two groups of second driving blocks 17 are respectively and spirally arranged with two groups of second screw rods 18, two groups of second screw rods 18 are respectively and rotatably arranged on two groups of second fixing plates 20, two groups of second fixing plates 20 are respectively and fixedly arranged at the front part and the rear part of the supporting plate 1, two groups of second screw rods 18 are respectively and rotatably arranged at the front part and the rear part of the supporting box 2, two groups of second cone wheels 19 are respectively and fixedly arranged on two groups of second screw rods 18, two groups of second cone wheels 19 are respectively meshed with two groups of first cone wheels 14, a driving motor 21 is fixedly arranged at the upper end of the supporting plate 1, the output end of the driving motor 21 is connected with the front end of the second screw rod 18 at the front side, a double-shaft motor 23 is fixedly arranged on a fixing frame 22, and the input ends of two groups of driving shafts 24 are respectively connected with two groups of output ends of the double-shaft motors 23, two groups of driving shafts 24 are respectively and rotatably installed on two groups of supporting plates 25, the two groups of supporting plates 25 are both fixedly installed on the fixed frame 22, two groups of driving cone pulleys 26 are respectively and fixedly installed on the two groups of driving shafts 24, the two groups of driving cone pulleys 26 are respectively engaged with the two groups of driven cone pulleys 27, two groups of third screw rods 28 are respectively and fixedly installed at the upper ends of the two groups of driven cone pulleys 27, the two groups of third screw rods 28 are respectively and spirally installed with two groups of sliding blocks 29, the two groups of sliding blocks 29 are respectively and vertically and slidably installed at the left part and the right part of the fixed frame 22, the left end and the right end of the support plate 1 are respectively and fixedly installed on the two groups of sliding blocks 29, the two groups of third screw rods 28 are respectively and rotatably installed at the left part and the right part of the fixed frame 22, and two groups of limiting blocks 30 are respectively and fixedly installed at the upper ends of the two groups of third screw rods 28; firstly, a double-shaft motor 23 is turned on, the double-shaft motor 23 drives two groups of driving conical wheels 26 to rotate through two groups of driving shafts 24, the two groups of driving conical wheels 26 drive two groups of third screw rods 28 to synchronously rotate through two groups of driven conical wheels 27, two groups of rotating supporting plates 25 enable a supporting plate 1 to ascend through two groups of sliding blocks 29 until the supporting plate 1 ascends to a height suitable for the operation of a worker, firstly, the front, the rear, the left and the right parts of a polyester film to be detected are respectively placed on four groups of clamping plates 5, the polyester film is positioned above a heating plate 3, then four groups of screw rods 7 are rotated, the four groups of screw rods 7 drive four groups of clamping plates 6 to descend through four groups of bearings 8, the four groups of clamping plates 6 are tightly attached to the upper ends of the polyester film, the polyester film is tightly pressed on the four groups of clamping plates 5 through the four groups of clamping plates 6, then the heating plate 4 is connected with an external power supply, then the heating plate 3 starts to heat, the polyester film is heated through radiation by the heating plate 3, when the polyester film is heated to a specified temperature, an external power supply is turned off, a driving motor 21 is turned on, the driving motor 21 drives a front second screw rod 18 to rotate, the front second screw rod 18 drives two groups of first cone wheels 14 to rotate through a front second cone wheel 19, the two groups of first cone wheels 14 drive a rear second cone wheel 19 to rotate, the two groups of second cone wheels 19 are opposite in rotation direction, the two groups of first cone wheels 14 drive two groups of first screw rods 13 to rotate, the two groups of second cone wheels 19 drive two groups of second driving blocks 17 to be away from each other through the two groups of second screw rods 18, the two groups of second driving blocks 17 drive two groups of clamping plates 5 on the front side and the rear side to be away from each other, so that the polyester film is longitudinally stretched by the two groups of clamping plates 5 on the front side and the rear side, and the two groups of first screw rods 13 drive the two groups of clamping plates 5 on the left side and the right side to transversely stretch the polyester film, the ductility of the polyester film can be deduced by detecting the distance between the four groups of clamping plates 5 until the polyester film is just pulled off; because polyester film is when detecting, it can transversely stretch in vertical stretching, so can detect the ductility of polyester film vertical and two horizontal directions simultaneously, convenient to use has improved work efficiency, can heat polyester film through hot plate 3 moreover, so can detect the ductility of polyester film under different temperatures, because the distance between clamp plate 6 and splint 5 can be adjusted, so its polyester film that can the different thickness of centre gripping, the limitation is low, has comprehensively improved the practicality.

As shown in fig. 1 to 6, in the operation of the stretching tool for mylar of the present invention, firstly, the biaxial motor 23 is turned on, the biaxial motor 23 drives the two sets of driving cone pulleys 26 to rotate through the two sets of driving shafts 24, the two sets of driving cone pulleys 26 drive the two sets of third screw rods 28 to synchronously rotate through the two sets of driven cone pulleys 27, the two sets of rotating supporting plates 25 make the supporting plate 1 rise through the two sets of sliding blocks 29 until the supporting plate 1 rises to a height suitable for the operation of a worker, firstly, the front, the rear, the left, the right, and the four portions of the mylar to be detected are respectively placed on the four sets of clamping plates 5, so that the mylar is positioned above the heating plate 3, then, the four sets of screw rods 7 are rotated, the four sets of screw rods 7 drive the four sets of clamping plates 6 to descend through the four sets of bearings 8, until the four sets of clamping plates 6 are tightly attached to the upper ends of the mylar, so that the mylar is tightly pressed on the four sets of clamping plates 5 by the four sets of clamping plates 6, and then the electric wires 4 are connected with an external power source, then the heating plate 3 starts to heat, the heating plate 3 heats the mylar by radiation until the mylar is heated to a specified temperature, then the external power supply is turned off, then the driving motor 21 is turned on, the driving motor 21 drives the second screw rod 18 at the front side to rotate, the second screw rod 18 at the front side drives the two groups of first cone wheels 14 to rotate through the second cone wheels 19 at the front side, the two groups of first cone wheels 14 drive the second cone wheels 19 at the rear side to rotate, the rotating directions of the two groups of second cone wheels 19 are opposite, the rotating directions of the two groups of first cone wheels 14 are opposite, the two groups of first cone wheels 14 drive the two groups of first screw rods 13 to rotate, then the two groups of second cone wheels 19 drive the two groups of second screw rods 18 to mutually keep away, the two groups of second drive blocks 17 drive the two groups of clamping plates 5 at the front side and the rear side to mutually keep away, so that the mylar is longitudinally stretched by the two groups of clamping plates 5 at the front side and the rear side, the two groups of first screw rods 13 which rotate simultaneously enable the polyester film to be transversely stretched through the two groups of clamping plates 5 on the left side and the right side until the polyester film is just stretched, and the ductility of the polyester film can be deduced by detecting the distance between the four groups of clamping plates 5.

The installation mode, the connection mode or the setting mode of the polyester film stretching tool of the utility model are common mechanical modes, and the installation mode, the connection mode or the setting mode can be implemented as long as the beneficial effects can be achieved; the utility model discloses a tensile frock of polyester film's bearing 8, driving motor 21, biaxial motor 23, drive cone pulley 26, driven cone pulley 27 and stopper 30 are purchase on the market, this industry technical staff only need according to its subsidiary operating specification install and operate can, and need not the technical staff in this field and pay out creative work.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A polyester film stretching tool is characterized by comprising a lifting device, a support plate (1), a support box (2), a heating plate (3), electric wires (4), a transverse movement mechanism, a longitudinal movement mechanism, a driving device and four groups of clamping devices, wherein the support plate (1) is fixedly arranged on the lifting device, the support box (2) is fixedly arranged on the support plate (1), the heating plate (3) is fixedly arranged on the support box (2), the electric wires (4) are arranged on the heating plate (3), the input end of the heating plate (3) is connected with the output end of the electric wires (4), the transverse movement mechanism is transversely arranged on the left part and the right part of the support plate (1), the longitudinal movement mechanism is longitudinally arranged on the front part and the rear part of the support plate (1), the four groups of clamping devices are respectively arranged on the left part and the right part of the transverse movement mechanism and the front part and the rear part of the longitudinal movement mechanism, the driving device is arranged on the support plate (1), and the driving device is used for driving the movement of the transverse movement mechanism and the longitudinal movement mechanism; clamping device includes splint (5), clamp plate (6), screw rod (7) and bearing (8), and slidable mounting is on splint (5) about clamp plate (6), and screw rod (7) and splint (5) spiral shell dress, and the lower extreme of screw rod (7) rotates to be installed on bearing (8), and bearing (8) fixed mounting is in clamp plate (6) upper end.

2. The mylar drawing tool as claimed in claim 1, wherein the transverse movement mechanism includes four sets of first slide rails (9), four sets of first slide blocks (10), two sets of first driving blocks (11), two sets of first fixing plates (12), two sets of first screw rods (13) and two sets of first cone pulleys (14), two sets of first slide rails (9) are fixedly mounted on the left and right portions of the support plate (1), the four sets of first slide blocks (10) are respectively slidably mounted on the four sets of first slide rails (9) left and right, two sets of clamping plates (5) are respectively fixedly mounted on the four sets of first slide blocks (10), one set of clamping plates (5) are fixedly mounted on the two sets of first slide blocks (10), two sets of first driving blocks (11) are respectively fixedly mounted at the lower ends of the two sets of clamping plates (5), two sets of first fixing plates (12) are respectively fixedly mounted on the left and right portions of the support plate (1), two sets of first screw rods (13) are respectively rotatably mounted on the two sets of first fixing plates (12), two sets of first screw rods (13) are respectively rotatably mounted on the support box (2), the first screw rods (13) and two sets of first screw rods (13) are respectively mounted on the first fixing plates (14), and the first set of first screw rods (13) and two sets of first cone pulleys (14).

3. The mylar stretching tool as claimed in claim 1, wherein said longitudinal movement mechanism comprises four sets of second slide rails (15), four sets of second slide blocks (16) and two sets of second driving blocks (17), two groups of second screw rods (18), two groups of second cone pulleys (19) and two groups of second fixing plates (20), four groups of second sliding rails (15) are fixedly installed at the front part and the rear part of the support plate (1) respectively, four groups of second sliding blocks (16) are slidably installed on the four groups of second sliding rails (15) respectively in the front and rear direction, two groups of clamping plates (5) at the front side and the rear side are fixedly installed at the upper ends of the four groups of second sliding blocks (16) respectively, one group of clamping plates (5) are fixedly installed at the upper ends of the two groups of second sliding blocks (16), two groups of second driving blocks (17) are fixedly installed at the lower ends of the two groups of clamping plates (5) at the front side and the rear side respectively, two groups of second driving blocks (17) are installed with the two groups of second screw rods (18) respectively in a screwed mode, two groups of second screw rods (18) are rotatably installed on the two groups of second fixing plates (20) respectively, two groups of second fixing plates (20) are fixedly installed at the front part and the rear part of the support plate (1) respectively, two groups of second cone pulleys (18) are rotatably installed at the front part and the front portion and the rear part of the support plate (2) respectively, two groups of second cone pulleys (19) are engaged with the two groups of second cone pulleys (14).

4. The polyester film stretching tool according to claim 1, wherein the driving device comprises a driving motor (21), the driving motor (21) is fixedly mounted at the upper end of the support plate (1), and an output end of the driving motor (21) is connected with a front end of the front second screw rod (18).

5. The mylar stretching tool according to claim 1, wherein the lifting device comprises a fixed frame (22), a biaxial motor (23), two sets of driving shafts (24), two sets of supporting plates (25), two sets of driving cone wheels (26), two sets of driven cone wheels (27), two sets of third screw rods (28) and two sets of sliding blocks (29), the biaxial motor (23) is fixedly mounted on the fixed frame (22), the input ends of the two sets of driving shafts (24) are respectively connected with the two sets of output ends of the biaxial motor (23), the two sets of driving shafts (24) are respectively rotatably mounted on the two sets of supporting plates (25), the two sets of supporting plates (25) are both fixedly mounted on the fixed frame (22), the two sets of driving cone wheels (26) are respectively fixedly mounted on the two sets of driving shafts (24), the two sets of driving cone wheels (26) are respectively engaged with the two sets of driven cone wheels (27), the two sets of third screw rods (28) are respectively fixedly mounted on the upper ends of the two sets of driven cone wheels (27), the two sets of third screw rods (28) are respectively screw rods (29) are respectively screw-mounted on the two sets of left and right supporting plates (29) of the fixed frame (22), the two sets of sliding blocks (29) are respectively slidably mounted on the left and right supporting plates (29).

6. The polyester film stretching tool according to claim 5, further comprising two sets of limiting blocks (30), wherein the two sets of limiting blocks (30) are respectively and fixedly mounted at the upper ends of the two sets of third screw rods (28).

7. The mylar stretching tooling as claimed in claim 5, wherein the fixing frame (22) is provided with an anti-rust coating.

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