A calender

Abstract

The present invention provides a calender which has a simple structure, good heating effect, convenient adjustment and good upper pressing effect. The calender includes a frame, on which there are an upper loop line and a lower loop line. The lower loop line is located below the upper loop line. Between the upper loop line and the lower loop line on the frame, there is a heating device for heating the upper material. On the frame, there is a pressure regulating device for adjusting the pressing of the upper material. On the frame, there is a first driving device for driving the upper loop line and the lower loop line to move. The heating device includes a heating plate, a U-shaped heat conducting plate and a heat insulating plate. The heat insulating plate is located below the U-shaped heat conducting plate. The heating plate is arranged between the heat insulating plate and the U-shaped heat conducting plate. The heating plate abuts against the U-shaped heat conducting plate. The heating plate abuts against the heat insulating plate. The U-shaped heat conducting plate is fixedly connected to the heat insulating plate through a fixing plate. The heat insulating plate is fixedly connected to the frame.

Description

Technical Field

[0001] The present invention relates to the technical field of shoe machinery, and particularly relates to a calender. Background Art

[0002] Currently in the shoe-making industry, the flyknit upper can be said to be a popular trend in the shoe industry. Whether it is Adidas, Nike, Anta or 361°, the main shoe models promoted in recent years are all flyknit uppers. Now, many shoe brands are successively launching flyknit upper shoe models. This horizontal knitted flyknit upper was first introduced from abroad and was popular abroad for some time. At first, people were surprised to see the real product, surprised that the product was so good and wondered how such a product was produced. And then the 3D flyknit upper is bound to become a future trend, especially suitable for some high-end jogging shoes and casual shoes. Domestic manufacturers have also started using 3D upper hot melt filaments and are constantly researching and developing.

[0003] In the manufacturing of 3D flyknit uppers, a calender is an essential production instrument. It can melt the 3D upper hot melt filaments inside the 3D flyknit upper and press them together with the outer upper, enabling the upper to form an elastic, stable, breathable and tough upper. Therefore, the calender is extremely important in the production of 3D flyknit uppers. In the upper pressing process, the upper is bonded by the pressure of the upper and lower high-temperature endless belts (i.e., the upper and lower belts) of the calender and the temperature of the upper and lower heating plates. Although the traditional calender can meet the pressing work of the upper, it still has the following disadvantages:

[0004] 1. The upper roller and the upper and lower guide cloth rollers on the calender are fixed, and the tightness or looseness of the entire high-temperature endless belt is adjusted by moving the lower roller. However, since the space of the upper at the inlet and the middle part of the high-temperature endless belt is always fixed, the upper is not really squeezed during the entire bonding process, so the bonding effect of the upper is poor.

[0005] 2. The heating effect of the heating plate is poor, resulting in a poor bonding effect of the upper. Moreover, the heating plate is easily deformed and damaged by heat, affecting the work efficiency and increasing the maintenance cost. Summary of the Invention

[0006] Therefore, in view of the above problems, the present invention proposes a calender with a simple structure, good heating effect, convenient adjustment and good upper pressing effect.

[0007] To solve the above technical problems, the solution adopted by the present invention is a calender, which includes a frame. An upper loop line and a lower loop line are provided on the frame. The lower loop line is located below the upper loop line. A heating device for heating the shoe upper material is provided between the upper loop line and the lower loop line on the frame. A pressure regulating device for adjusting the pressing of the shoe upper material is provided on the frame. A first driving device for driving the movement of the upper loop line and the lower loop line is provided on the frame. The heating device includes a heating plate, a U-shaped heat conducting plate and a heat insulating plate. The heat insulating plate is located below the U-shaped heat conducting plate. The heating plate is arranged between the heat insulating plate and the U-shaped heat conducting plate. The heating plate abuts against the U-shaped heat conducting plate. The heating plate abuts against the heat insulating plate. The U-shaped heat conducting plate is fixedly connected to the heat insulating plate through a fixing plate. The heat insulating plate is fixedly connected to the frame.

[0008] Further improvement is that: a number of notches for preventing the deformation of the U-shaped heat conducting plate are provided on the U-shaped heat conducting plate.

[0009] Further improvement is that: the heat insulating plate is composed of a number of U-shaped heat insulating plates, and each U-shaped heat insulating plate is fixedly arranged inside the U-shaped heat conducting plate.

[0010] Further improvement is that: it further includes a support rod, which is fixedly arranged on the frame. The support rod is located below the heat insulating plate. A number of adjusting bolts are provided on the support rod, and the adjusting bolts abut against the heat insulating plate.

[0011] Further improvement is that: the upper loop line includes an upper pressing roller, an upper guide cloth roller and an upper supporting roller that are rotatably arranged on the frame. An upper high-temperature annular belt is wound around the upper pressing roller, the upper guide cloth roller and the upper supporting roller. The lower loop line includes a lower pressing roller, a lower guide cloth roller and a lower supporting roller that are rotatably arranged on the frame. A lower high-temperature annular belt is wound around the lower pressing roller, the lower guide cloth roller and the lower supporting roller.

[0012] Further improvement is that: the pressure regulating device includes a number of first movable plates and a number of second movable plates. The first movable plates are hinged to the frame and are respectively located at both ends of the frame. The lower pressing roller on the lower loop line is rotatably arranged on the first movable plates. The second movable plates are hinged to the frame and are respectively located at both ends of the frame. The lower guide cloth roller is arranged on the second movable plates. The other end of the second movable plate is hinged to a connecting plate, and the other end of the connecting plate is hinged to the first movable plate. An activity device for driving the activity of the first movable plate is connected to the first movable plate.

[0013] Further improvement is that: the movable device includes a driving rod, the driving rod is fixedly arranged between the first movable plates, a rotating shaft is rotatably arranged on the frame, a rotating plate is fixedly arranged on the rotating shaft, a connecting pin is fixedly arranged on the rotating plate, a connecting rod is hinged between the driving rod and the connecting pin, and a second driving device for driving the rotating plate to rotate is arranged on the frame.

[0014] Further improvement is that: the left and right ends of the frame are respectively provided with an upper first tensioning roller, an upper second tensioning roller and a lower first tensioning roller, a lower second tensioning roller for tensioning the upper high-temperature endless belt and the lower high-temperature endless belt, a first adjusting device for adjusting the tension of the upper high-temperature endless belt and the lower high-temperature endless belt is arranged on the upper first tensioning roller and the lower first tensioning roller, and a second adjusting device for adjusting the tension of the upper high-temperature endless belt and the lower high-temperature endless belt is arranged on the upper second tensioning roller and the lower second tensioning roller.

[0015] Further improvement is that: the first adjusting device includes a slider, the upper first tensioning roller and the lower first tensioning roller are fixedly arranged on the slider, a chute is formed on the frame, the slider is slidably arranged in the chute, a screw rod is rotatably arranged on the frame, a threaded block is threadedly connected to the screw rod, and the slider is fixedly connected to the threaded block.

[0016] Further improvement is that: the second adjusting device includes a plurality of return springs, a plurality of adjusting grooves are formed on the frame, the extending shafts of the upper first tensioning roller and the lower first tensioning roller are arranged in the adjusting grooves, the return springs are arranged in the adjusting grooves, one end of the return spring abuts against the extending shafts of the upper first tensioning roller and the lower first tensioning roller, and the other end of the return spring abuts against the inner wall of the adjusting groove.

[0017] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows:

[0018] 1. The heating plate is arranged between the U-shaped heat conducting plate and the U-shaped heat insulating plate, which can improve the heating effect, prevent the loss of heat of the heating plate, save energy, and improve the working efficiency of the heating plate.

[0019] 2. There are multiple U-shaped heat insulating plates and they are locked to the bottom of the U-shaped heat conducting plate by screws. This can not only further prevent the heat dissipation of the heating plate, improve the working efficiency of the heating plate, but also facilitate the installation and maintenance of the U-shaped heat insulating plate and the U-shaped heat conducting plate. At the same time, it can also prevent the heat insulating plate from expanding and contracting due to long-term heating and deforming.

[0020] 3. The notch on the U-shaped heat conducting plate can prevent the U-shaped heat conducting plate from deforming due to stress during thermal expansion and contraction, so that after the U-shaped heat conducting plate is heated, the heat is unevenly distributed, affecting the heating effect of the heat conducting plate and indirectly affecting the heating effect on the shoe upper material. At the same time, it can also improve the service life of the U-shaped heat conducting plate and reduce the maintenance cost.

[0021] 4. The adjusting bolts on the support rod hold components such as the U-shaped heat insulation plate, the heating plate, and the U-shaped heat conducting plate, which can improve the stability of the U-shaped heat conducting plate and further prevent it from being deformed more easily under pressure during the heating operation, so that it will not be deformed due to excessive pressure during operation. Moreover, the adjusting bolts can adjust the distance between the U-shaped heat conducting plate and the high-temperature annular belt, enabling the heat generation effect of the heat conducting plate to reach the extreme.

[0022] 5. Both the lower pressing roller and the lower fabric guiding roller can be adjusted in terms of distance, so that the pressing effect of the upper and lower pressing rollers and the upper and lower fabric guiding rollers on the shoe upper after adjustment is better, and the bonding effect is also better.

[0023] 6. The structure is simple and the adjustment is convenient. The driving rod can adjust both the lower pressing roller and the lower fabric guiding roller simultaneously.

[0024] 7. During adjustment, the two ends of the lower pressing roller and the lower fabric guiding roller are adjusted synchronously, so that the distance between the upper pressing roller and the lower pressing roller and the shoe upper can be adjusted. There will be no phenomenon of uneven pressing or poor pressing effect in local areas of the shoe upper, and the synchronous adjustment further prevents the high-temperature belt running on it from deviating.

[0025] 8. The first adjustment device can not only facilitate the installation of the high-temperature annular belt, but also adjust the tightness of the belt and the deviation of the high-temperature annular belt, which is beneficial to the stable operation of the machine. At the same time, it can also increase the efficiency and pressing effect of the shoe upper pressing.

[0026] 9. When the first tensioning roller and the lower first tensioning roller are damaged, they can be directly taken out from the installation holes and then reinstalled, thus avoiding disassembling the entire machine for maintenance and replacement, facilitating its installation and maintenance, and greatly improving the efficiency.

[0027] 10. The return spring in the second adjustment device can be compressed to make space when installing the high-temperature annular belt. It can not only further facilitate the installation of the high-temperature annular belt, save the use of the high-temperature annular belt, and make it more cost-saving, but also tension the high-temperature annular belt when the return spring drives the first tensioning roller and the lower first tensioning roller to return to their positions, enabling it to run better and perform better shoe upper pressing. Moreover, during the operation of the high-temperature annular belt, the telescopic function of the return spring can buffer the tension of the high-temperature annular belt during operation, reduce the friction of the belt, and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic cross-sectional view of a calender in Embodiment 1 of the present invention.

[0029] Figure 2 is an enlarged schematic view of the pressure regulating device at A in Embodiment 1 of the present invention.

[0030] Figure 3 It is a schematic cross-sectional view of the heating device in the first embodiment of the present invention.

[0031] Figure 4 It is a schematic view of the structure of the heating device in the first embodiment of the present invention.

[0032] Figure 5 It is a schematic view of the structure of the second adjusting device in the first embodiment of the present invention.

[0033] Figure 6 It is a schematic view of the structure of the first adjusting device in the first embodiment of the present invention.

[0034] Figure 7 It is a partial schematic view of the structure of the first driving device in the first embodiment of the present invention.

[0035] Figure 8 It is a schematic view of the structure of a calender in the first embodiment of the present invention.

[0036] Figure 9 It is a schematic view of the structure of the second adjusting device in the second embodiment of the present invention. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Embodiment 1

[0038] Refer to Figures 1 - 8 What is disclosed in the embodiment of the present invention is a calender, including a frame 1. On the frame 1, an upper pressure roller 2, an upper guide cloth roller 4 and an upper supporting roller 7 are rotatably arranged through bearings. An upper high-temperature endless belt 8 is wound around the upper pressure roller 2, the upper guide cloth roller 4 and the upper supporting roller 7. Below the upper high-temperature endless belt 8 on the frame 1, a lower pressure roller 3, a lower guide cloth roller 5 and a lower supporting roller 6 are rotatably arranged through bearings. A lower high-temperature endless belt 9 is wound around the lower pressure roller 3, the lower guide cloth roller 5 and the lower supporting roller 6. A first sprocket 114 is fixedly arranged on the output shaft of the upper pressure roller 2. A second sprocket 113 is fixedly arranged on the output shaft 31 of the lower pressure roller 3. A first driving motor (not shown in the figure) is arranged on the frame 1. A driving sprocket 116 is fixedly arranged on the shaft of the first driving motor. A chain 115 is wound between the first sprocket 114 and the driving sprocket 116. The second sprocket 113 meshes with the chain 115 and the second sprocket 113 is located outside the chain 115. Among them, the first driving motor drives the driving sprocket 116 to rotate. Under the action of the chain 115, the driving sprocket 116 drives the first sprocket 114 and the second sprocket 113 to rotate, thereby driving the upper pressure roller 2 and the lower pressure roller 3 to rotate. Under the transmission of the upper pressure roller 2 and the lower pressure roller 3, the upper high-temperature endless belt 8 and the lower high-temperature endless belt 9 rotate reciprocally in the frame 1;

[0039] A heating device 10 for heating the shoe upper material is provided between the upper high-temperature annular belt 8 and the lower high-temperature annular belt 9 on the frame 1. The heating device 10 includes a heating plate 102, a U-shaped heat conducting plate 101 and a heat insulating plate 103. The heat insulating plate 103 is located below the U-shaped heat conducting plate 101. The heating plate 102 is arranged between the heat insulating plate 103 and the U-shaped heat conducting plate 101. The heating plate 102 abuts against the U-shaped heat conducting plate 101, and the heating plate 102 abuts against the heat insulating plate 103. The heat insulating plate 103 is a plurality of U-shaped heat insulating plates. The U-shaped heat insulating plates are located below the U-shaped heat conducting plate 101, and each U-shaped heat insulating plate is locked in the U-shaped heat conducting plate 101 by screws. The heating plate 102 is arranged between the U-shaped heat insulating plate and the U-shaped heat conducting plate 101. The heating plate 102 abuts against the U-shaped heat conducting plate 101, and the heating plate 102 abuts against the U-shaped heat insulating plate. A plurality of notches 106 for preventing the U-shaped heat conducting plate 101 from deforming are formed on the U-shaped heat conducting plate 101. A support rod 104 is further provided on the frame 1. The support rod 104 is located below the U-shaped heat insulating plate. A plurality of adjusting bolts 105 are provided on the support rod 104. The adjusting bolts 105 abut against the U-shaped heat insulating plate. Among them, the heating plate 102 is arranged between the U-shaped heat conducting plate 101 and the U-shaped heat insulating plate, which can improve the heating effect, prevent the loss of heat of the heating plate 102, save energy and improve the working efficiency of the heating plate 102. There are a plurality of U-shaped heat insulating plates, which are locked at the bottom of the U-shaped heat conducting plate 101 by screws. This can not only further prevent the heat dissipation of the heating plate 102, improve the working efficiency of heating, but also facilitate the installation and maintenance of the U-shaped heat insulating plate and the U-shaped heat conducting plate 101. At the same time, it can also prevent the heat insulating plate 103 from deforming due to thermal expansion and contraction caused by long-term heating. The notches 106 on the U-shaped heat conducting plate 101 can prevent the U-shaped heat conducting plate 101 from deforming under stress during thermal expansion and contraction, prevent the U-shaped heat conducting plate 101 from being unevenly heated after heating, which affects the heat conduction effect of the heat conducting plate and indirectly affects the heating effect on the shoe upper material. At the same time, it can also improve the service life of the U-shaped heat conducting plate 101, reduce the maintenance cost. The adjusting bolts 105 on the support rod 104 support components such as the U-shaped heat insulating plate, the heating plate 102 and the U-shaped heat conducting plate 101, improving the stability of the U-shaped heat conducting plate 101 on the frame 1, so that when the heating device 10 is working, it will not be deformed due to excessive pressure from the high-temperature annular belt when the high-temperature annular belt passes by. Moreover, the adjusting bolts 105 can adjust the distance between the U-shaped heat conducting plate 101 and the high-temperature annular belt, so that the heat conduction effect of the heat conducting plate can reach the best effect;

[0040] The frame 1 is provided with a pressure regulating device for adjusting the lower pressing roller 3 and the lower fabric guiding roller 5 to better press the shoe upper. The pressure regulating device includes two first movable plates 15 and two second movable plates 16. The first movable plates 15 are hinged to the frame 1 through pin shafts and are respectively located at both ends of the frame 1. The lower pressing roller 3 is arranged on the first movable plates 15. The second movable plates 16 are hinged to the frame 1 through pin shafts and are respectively located at both ends of the frame 1. The lower fabric guiding roller 5 is arranged on the second movable plates 16. The other end of the second movable plate 16 is hinged with a connecting plate 17 through a pin shaft. The other end of the connecting plate 17 is hinged to the first movable plate 15 through a pin shaft. A driving rod 22 is fixedly connected between the two first movable plates 15. A rotating shaft 20 is rotatably arranged on the frame 1 through a bearing. A rotating plate 21 is fixedly arranged on the rotating shaft 20. A connecting pin 19 is fixedly arranged on the rotating plate 21. A connecting rod 18 is hinged between the driving rod 22 and the connecting pin 19. A worm gear (not shown in the figure) is fixedly arranged on the rotating shaft 20. A worm (not shown in the figure) is rotatably arranged on the frame 1 through a bearing. A second driving motor (not shown in the figure) is arranged on the frame 1. The output shaft of the second driving motor is fixedly connected to the input shaft of the worm. Among them, the driving rod 22 can drive the lower pressing roller 3 and the lower fabric guiding roller 5 to be adjusted simultaneously, so that the shoe upper pressed by the adjusted upper and lower pressing rollers 3 and upper and lower fabric guiding rollers 5 has a better effect and a better bonding effect. Moreover, during the adjustment, both ends of the lower pressing roller 3 and the lower fabric guiding roller 5 are adjusted synchronously, so that the phenomenon of uneven pressing and poor pressing effect in the local area of the shoe upper will not occur, and the phenomenon of deviation of the high-temperature annular belt wound around them will not occur. The working principle is as follows:

[0041] When adjusting the lower pressing roller and the lower fabric guiding roller, the second driving motor drives the worm to rotate. The worm drives the worm gear to rotate. The worm gear drives the rotating shaft 20 to rotate. The rotating plate 21 on the rotating shaft 20 rotates accordingly, driving the connecting pin 19 to rotate. When the connecting pin 19 rotates downward and clockwise, it pulls the connecting rod 18 to move downward, and then drives the driving rod 22 to move downward. Under the action of the driving rod 22, one end of the first movable plate 15 and the second movable plate 16 moves downward, and the other ends of the first movable plate 15 and the second movable plate 16 move upward. The lower pressing roller and the lower fabric guiding roller 5 located at the other ends of the first movable plate 15 and the second movable plate 16 move upward accordingly, approaching the upper pressing roller and the upper fabric guiding roller, and at the same time, the distance between the two pressing rollers and the two fabric guiding rollers is adjusted, that is, the pressure of the two pressing rollers and the two fabric guiding rollers on the shoe upper is adjusted.

[0042] In order to enable the machine to operate and maintain better and improve the working efficiency of the machine, upper first tension rollers 13, upper second tension rollers 11 and lower first tension rollers 14, lower second tension rollers 12 for tensioning the upper high-temperature endless belt 8 and the lower high-temperature endless belt 9 are respectively arranged at the left and right ends of the frame 1. First adjusting devices for adjusting the tension of the upper high-temperature endless belt 8 and the lower high-temperature endless belt 9 are respectively arranged on the upper first tension rollers 13 and the lower first tension rollers 14. The first adjusting device includes sliders 132. Two chute grooves 131 are formed on the frame 1. The sliders 132 are slidably arranged in the chute grooves 131. The shafts of the upper first tension rollers 13 and the lower first tension rollers 14 are respectively locked on the sliders 132 by screws. A screw rod 134 is rotatably arranged on the frame 1 through bearings. A threaded block 133 is threadedly connected to the screw rod 134. The sliders 132 are locked on the threaded block 133. By rotating the screw rod 134, the threaded block 133 can be driven to slide, and then the sliders 132 can be driven to slide, so as to adjust the tightness and deviation of the endless belt. Second adjusting devices for adjusting the tension of the upper high-temperature endless belt 8 and the lower high-temperature endless belt 9 are arranged on the upper second tension rollers 11 and the lower second tension rollers 12. The second adjusting device includes four return springs 112. Four adjusting grooves 111 are formed on the frame 1. The protruding shafts of the upper first tension rollers 13 and the lower first tension rollers 14 are respectively arranged in the adjusting grooves 111. The return springs 112 are arranged in the adjusting grooves 111. One end of the return spring 112 abuts against the protruding shafts of the upper first tension rollers 13 and the lower first tension rollers 14, and the other end of the return spring 112 abuts against the inner wall of the adjusting groove 111. Among them, the first adjusting device can facilitate the installation of the high-temperature endless belt and can also adjust the deviation of the high-temperature endless belt, which is beneficial to the stable operation of the machine, increases the efficiency and pressing effect of shoe upper pressing. And the return springs 112 in the second adjusting device can compress the return springs 112 to make space when installing the high-temperature endless belt. It can not only further facilitate the installation of the high-temperature endless belt, save the use of the high-temperature endless belt, make it more cost-saving, but also tension the high-temperature endless belt when the return springs 112 drive the upper first tension rollers 13 and the lower first tension rollers 14 to return to their positions, so that it can operate better and perform shoe upper pressing better. Moreover, during the operation of the high-temperature endless belt, the telescopic function of the return springs 112 can buffer the tension force of the operation of the high-temperature endless belt, reduce the friction of the belt, and extend its service life.

[0043] In order to prevent heat dissipation, improve the working efficiency of the machine and save energy, a heat preservation cover 25 is covered on the frame 1. The heat preservation cover 25 can not only reduce the temperature dissipation inside the machine, but also seal the machine to improve the safety of the machine during operation.

[0044] In order to improve the operation efficiency, a feeding platform 24 is provided at the front section of the frame 1, and a discharging platform 23 is provided at the rear end of the frame 1. The feeding platform 24 can facilitate the placement of the shoe upper materials and stably convey the shoe upper materials. The discharging platform 23 can facilitate the storage of the pressed shoe upper materials. The feeding platform 24 and the discharging platform 23 can also help keep the shoe upper materials clean and improve the processing quality of the shoe upper materials. Embodiment 2

[0045] According to Figure 9 , based on the above solution, the second adjusting device in the present invention can also be: the second adjusting device includes an adjusting screw 3', an adjusting groove 2' is formed on the frame 1', and an installation hole 4' for facilitating the installation of the tensioning roller is also formed on the frame 1' and is connected to the adjusting groove 2'. One end of the adjusting screw 3' is fixedly provided with a first fixing block 7', and the first fixing block 7' is locked to the upper first tensioning roller 11' and the lower first tensioning roller (not shown in the figure) respectively through screws 8'. A second fixing block 5' is fixedly provided on the frame 1', the other end of the adjusting screw 3' passes through the second fixing block 5' and extends out of the second fixing block 5', a nut 6' is sleeved on the adjusting screw 3', and the nut 6' resists against the second fixing block 5'. When adjusting the belt tension and deviation, as long as the nut 6' is rotated, the adjusting screw 3' will drive the upper first tensioning roller 11' and the lower first tensioning roller to slide in the adjusting groove 2'. The adjusting screw 3' can adjust the tightness of the belt, which not only facilitates the winding and installation of the belt, but also the adjusting screw 3' can further adjust the deviation of the belt, so that the belt can rotate more stably, and then the shoe upper has a better pressing effect. At the same time, adjusting the adjusting screw 3' can adjust the belt to the most suitable tension, and improve the operation efficiency of the machine. The installation hole 4' connected to the adjusting groove 2' can directly take out the first tensioning roller and the lower first tensioning roller from the installation hole after they are damaged, and then install them again, thus avoiding disassembling the whole machine for maintenance and replacement, facilitating its installation and maintenance, and greatly improving the efficiency.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A calender, comprising a frame, on which an upper loop line and a lower loop line are provided, the lower loop line being located below the upper loop line, a heating device for heating the shoe upper material is provided between the upper loop line and the lower loop line on the frame, a pressure regulating device for adjusting the pressing of the shoe upper material is provided on the frame, and a first driving device for driving the upper loop line and the lower loop line to move is provided on the frame, characterized in that: The heating device includes a heating plate, a U-shaped heat conducting plate and a heat insulating plate. The heat insulating plate is located below the U-shaped heat conducting plate. The heating plate is arranged between the heat insulating plate and the U-shaped heat conducting plate. The heating plate abuts against the U-shaped heat conducting plate, and the heating plate abuts against the heat insulating plate. The U-shaped heat conducting plate is fixedly connected to the heat insulating plate through a fixing plate. The heat insulating plate is fixedly connected to the frame. The heat insulating plate is composed of several U-shaped heat insulating plates, and each U-shaped heat insulating plate is fixedly arranged inside the U-shaped heat conducting plate. The upper loop line includes an upper pressure roller, an upper guiding cloth roller and an upper supporting roller rotatably arranged on the frame. An upper high-temperature annular belt is wound around the upper pressure roller, the upper guiding cloth roller and the upper supporting roller. The lower loop line includes a lower pressure roller, a lower guiding cloth roller and a lower supporting roller rotatably arranged on the frame. A lower high-temperature annular belt is wound around the lower pressure roller, the lower guiding cloth roller and the lower supporting roller. The pressure regulating device includes several first movable plates and several second movable plates. The first movable plates are hinged to the frame and are respectively located at both ends of the frame. The lower pressure roller on the lower loop line is rotatably arranged on the first movable plate. The second movable plates are hinged to the frame and are respectively located at both ends of the frame. The lower guiding cloth roller is arranged on the second movable plate. The other end of the second movable plate is hinged to a connecting plate, and the other end of the connecting plate is hinged to the first movable plate. A movable device for driving the first movable plate to move is connected to the first movable plate. The movable device includes a driving rod. The driving rod is fixedly arranged between the first movable plates. A rotating shaft is rotatably arranged on the frame. A rotating plate is fixedly arranged on the rotating shaft. A connecting pin is fixedly arranged on the rotating plate. A connecting rod is hinged between the driving rod and the connecting pin. A second driving device for driving the rotating plate to rotate is arranged on the frame.

2. The calender according to claim 1, characterized in that: Several notches for preventing the U-shaped heat conducting plate from deforming are formed on the U-shaped heat conducting plate.

3. A calender according to claim 1, characterized in that: It further includes a supporting rod. The supporting rod is fixedly arranged on the frame. The supporting rod is located below the heat insulating plate. Several adjusting bolts are arranged on the supporting rod, and the adjusting bolts abut against the heat insulating plate.

4. A calender according to claim 1, wherein: An upper first tensioning roller, an upper second tensioning roller for tensioning the upper high-temperature annular belt and a lower first tensioning roller, a lower second tensioning roller for tensioning the lower high-temperature annular belt are respectively arranged at the left and right ends of the frame. A first adjusting device for adjusting the tension of the upper high-temperature annular belt and the lower high-temperature annular belt is arranged on the upper first tensioning roller and the lower first tensioning roller. A second adjusting device for adjusting the tension of the upper high-temperature annular belt and the lower high-temperature annular belt is arranged on the upper second tensioning roller and the lower second tensioning roller.

5. A calender according to claim 4, characterized in that: The first adjusting device includes a slider. The upper first tensioning roller and the lower first tensioning roller are fixedly arranged on the slider. A chute is formed on the frame. The slider is slidably arranged in the chute. A screw rod is rotatably arranged on the frame. A threaded block is threadedly connected to the screw rod. The slider is fixedly connected to the threaded block.

6. A calender according to claim 5, characterized in that: The second adjusting device includes a plurality of reset springs. A plurality of adjusting grooves are formed on the frame. The protruding shafts of the upper first tensioning roller and the lower first tensioning roller are arranged in the adjusting grooves. The reset springs are arranged in the adjusting grooves. One end of the reset spring abuts against the protruding shafts of the upper first tensioning roller and the lower first tensioning roller, and the other end of the reset spring abuts against the inner wall of the adjusting groove.

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