A POE solar backing film production line

Abstract

The invention discloses a POE solar backing plate film production line in the field of film processing technology, comprising a batching feed bin, a first conveying auger, a bucket elevator, a dryer, an embedded scraper conveyor, a rotary distributor, a batching bin group, a mixing device, an extruder, a traction device, a stretching device, a cooling device, a thickness gauge, a stress relief device, a cutting device and a winding device, which are connected in sequence. The batching feed bin of the invention is arranged under the ground for the convenience of staff to add materials, and the film is slowly stretched by increasing the rotation angle in sequence through the stretching device, and the stretching effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of thin film processing, in particular to a POE solar backing plate film production line. Background Art

[0002] The solar backsheet is located on the back of the solar panel, protecting and supporting the cells, and has reliable insulation, water resistance, and aging resistance. It generally has a three-layer structure, with the outer protective layer PVDF having good resistance to environmental erosion, the middle layer is PET polyester film with good insulation performance, and the inner layer PVDF and EVA have good bonding properties.

[0003] Factories need to use production lines when producing films. The films need to be stretched during the film production process, but the existing film production lines are not effective in stretching the films and need to be improved.

[0004] Based on this, the present invention designs a POE solar backing plate film production line to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a POE solar backing plate film production line to solve the problem mentioned in the above background technology that the existing film production line has a poor effect on film stretching and needs to be improved.

[0006] To achieve the above object, the present invention provides the following technical solutions: a POE solar backing sheet film production line, comprising a batching feed bin, a first conveying auger, a bucket elevator, a dryer, an embedded scraper conveyor, a rotary distributor, a batching bin group, a mixing device, an extruder, a traction device, a stretching device, a cooling device, a thickness gauge, a stress relief device, a cutting device and a winding device connected in sequence;

[0007] The stretching device comprises a mounting plate, a rotating shaft rotatably connected to the mounting plate, a horizontal plate fixed to one end of the rotating shaft, two sets of movable rotating drums rotatably connected to both ends of the horizontal plate parallel to the axis of the rotating shaft, and a fixed rotating drum rotatably connected to the mounting plate;

[0008] A first gear is fixed to the other end of the rotating shaft, a first rack is provided which slides on the mounting plate and meshes with the first gear, and a rotating wheel is driven to rotate by a rotating device. A telescopic connecting rod is hinged between the edge of the rotating wheel and one end of the first rack, and a turntable is connected to the turntable which is driven to rotate intermittently by an intermittent driving device. The turntable has a ring array of limit blocks centered on its axis, and the lengths of the limit blocks arranged in the direction of rotation decrease. The other end of the first rack slides close to or away from the limit block.

[0009] Preferably, the telescopic connecting rod includes an outer tube, a second rack linearly slidably connected to the outer tube, and a first elastic member arranged inside the outer tube, and the elastic force of the first elastic member drives the second rack to move away from the outer tube.

[0010] Preferably, a second gear meshing with the second rack is rotatably connected in the outer cylinder, a one-way wheel is installed in the outer cylinder, and the second gear and the one-way wheel are connected to or separated from each other through an electromagnetic clutch.

[0011] Preferably, the intermittent driving device drives the transverse axis to move intermittently, and the turntable moves on the transverse axis along the axis direction of the transverse axis. A second elastic member is sleeved on the outer wall of the transverse axis, and the elastic force of the second elastic member drives the turntable toward the first rack. A switch electrically connected to the electromagnetic clutch is provided.

[0012] Preferably, a temporary storage bin is provided between the batching bin group and the mixing device, and each group of batching bins in the batching bin group is connected to the temporary storage bin via a one-to-one corresponding second conveying auger.

[0013] Preferably, a middle cylinder is provided in the temporary storage bin, and a plurality of partitions are provided between the outer wall of the middle cylinder and the inner wall of the temporary storage bin. Adjacent partitions form independent buffer spaces and correspond one-to-one with the second conveying auger. A closing mechanism is provided for simultaneously opening or closing the openings below the plurality of buffer spaces.

[0014] Preferably, the closing mechanism comprises a telescopic device installed inside the middle cylinder, a hinge seat is installed at the output end of the telescopic device, a plurality of bottom plates corresponding to the buffer spaces are hinged at the bottom of the middle cylinder, and the bottom plates are hinged to the hinge seat through a hinged curved link.

[0015] Preferably, the partition includes a fixed plate fixed to the outer wall of the middle cylinder and a movable plate rotatably connected to the outer wall of the middle cylinder through a swivel; the fixed plate is rotatably connected to a screw rod on one side close to the movable plate through a motor; a sliding seat is threadedly connected to the outer wall of the screw rod; a straight connecting rod is connected between the sliding seat and the movable plate.

[0016] Preferably, a weighing screw conveyor is connected between the mixing device and the extruder.

[0017] Preferably, the output end of the cutting device is connected to a side material recovery device which is parallel to the winding device.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the batching and feeding bin of the present invention is arranged under the ground to facilitate the staff to add materials, and the film is slowly stretched by increasing the rotation angle in sequence through the stretching device, and the stretching effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the production line structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the batching bin group and temporary storage bin of the present invention;

[0022] Figure 3 This is a schematic diagram of the inverted structure of the temporary storage bin of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the temporary storage bin of the present invention;

[0024] Figure 5 This is a schematic diagram of the matching structure of the partition and the middle tube of the present invention;

[0025] Figure 6 This is a schematic diagram of the partition structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the stretching device of the present invention in the first direction;

[0027] Figure 8 It is a schematic diagram of the structure of the stretching device of the present invention in the second direction;

[0028] Fig. 9 It is a schematic diagram of the structure of the stretching device of the present invention in the third direction;

[0029] Fig.10 It is a schematic diagram of the matching structure of the turntable, the second elastic member and the switch of the present invention;

[0030] Fig.11 This is a schematic diagram of the structure of the telescopic connecting rod in the first direction of the present invention;

[0031] Fig.12 This is a schematic diagram of the structure of the telescopic connecting rod in the second direction of the present invention;

[0032] Fig.13 It is a schematic diagram of the structure of the stress relief device of the present invention.

[0033] 1. Batching bin; 11. First conveying auger; 2. Bucket elevator; 21. Scraper conveyor; 22. Dryer; 3. Batching bin group; 31. Rotary distributor; 32. Second conveying auger; 4. Mixing device; 41. Temporary storage bin; 411. Feeding port; 42. Middle cylinder; 43. Partition plate; 431. Fixed plate; 432, movable plate; 433, rotating ring; 434, screw rod; 435, motor; 436, slide seat; 437, straight connecting rod; 44, telescopic device; 441, hinge seat; 45, bottom plate; 46, curved connecting rod; 5, extruder; 51, heating device; 52, weighing screw conveyor; 6, stretching device; 61, mounting plate; 62, rotating shaft; 63, horizontal plate; 64, movable rotating drum; 65, fixed rotating drum; 66, first gear; 67, first rack; 68, telescopic connecting rod; 681, outer cylinder; 682, second rack; 683, first elastic member; 684, second gear; 685. One-way wheel; 686. Electromagnetic clutch; 69. Rotating wheel; 610. Rotating device; 611. Intermittent driving device; 612. Turntable; 613. Limit block; 614. Horizontal axis; 615. Second elastic member; 616. Switch; 7. Traction device; 8. Cooling device; 81. Cutting device; 82. Thickness gauge; 83. Stress relieving device; 9. Winding device; 91. Edge material recovery device. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] A POE solar backing sheet film production line comprises a batching feed bin 1, a first conveying auger 11, a bucket elevator 2, a drying machine 22, a buried scraper conveyor 21, a rotary distributor 31, a batching bin group 3, a mixing device 4, an extruder 5, a traction device 7, a stretching device 6, a cooling device 8, a thickness gauge 82, a stress relief device 83, a cutting device 81 and a winding device 9 connected in sequence;

[0036] The stretching device 6 includes a mounting plate 61, a rotating shaft 62 rotatably connected to the mounting plate 61, a horizontal plate 63 fixed to one end of the rotating shaft 62, two sets of movable rotating drums 64 rotatably connected to both ends of the horizontal plate 63 parallel to the axis of the rotating shaft 62, and a fixed rotating drum 65 rotatably connected to the mounting plate 61;

[0037] A first gear 66 is fixed to the other end of the rotating shaft 62, a first rack 67 is provided which slides on the mounting plate 61 and meshes with the first gear 66, and a rotating wheel 609 is driven to rotate by a rotating device 610. A telescopic connecting rod 68 is hinged between the edge of the rotating wheel 609 and one end of the first rack 67. A turntable 612 is connected to the turntable 612 which is driven to rotate intermittently by an intermittent driving device 611. The turntable 612 has a ring array of limit blocks 613 centered on its axis. The lengths of the limit blocks 613 arranged in the direction of rotation decrease, and the other end of the first rack 67 slides close to or away from the limit block 613.

[0038] Furthermore, the telescopic link 68 includes an outer tube 681 , a second rack 682 linearly slidably connected to the outer tube 681 , and a first elastic member 683 disposed inside the outer tube 682 . The elastic force of the first elastic member 683 drives the second rack 682 to move away from the outer tube 681 .

[0039] Furthermore, a second gear 684 meshing with the second rack 682 is rotatably connected inside the outer cylinder 681 , a one-way wheel 685 is installed inside the outer cylinder 681 , and the second gear 684 and the one-way wheel 685 are connected as one or separated via an electromagnetic clutch 686 .

[0040] Furthermore, the intermittent drive device 611 drives the horizontal axis 614 to move intermittently, and the turntable 612 moves on the horizontal axis 614 along the axial direction of the horizontal axis 614. The outer wall of the horizontal axis 614 is sleeved with a second elastic member 615, and the elastic force of the second elastic member 615 drives the turntable 612 to approach the first rack 67. A switch 616 electrically connected to the electromagnetic clutch 686 is provided.

[0041] Furthermore, a temporary storage bin 41 is provided between the batching bin group 3 and the mixing device 4 , and each group of batching bins in the batching bin group 3 is connected to the temporary storage bin 41 via a one-to-one corresponding second conveying auger 32 .

[0042] Furthermore, a middle cylinder 42 is provided in the temporary storage bin 41, and a plurality of partitions 43 are provided between the outer wall of the middle cylinder 42 and the inner wall of the temporary storage bin 41. Adjacent partitions 43 form independent buffer spaces and correspond one-to-one with the second conveying auger 32. A closing mechanism is provided for simultaneously opening or closing the openings below the plurality of buffer spaces.

[0043] Furthermore, the closing mechanism includes a telescopic device 44 installed inside the middle cylinder 42, a hinge seat 441 is installed at the output end of the telescopic device 44, and a plurality of bottom plates 45 corresponding to the buffer spaces are hinged at the bottom of the middle cylinder 42, and the bottom plates 45 are hinged to the hinge seat 441 through a hinged curved link 46.

[0044] Furthermore, the partition 43 includes a fixed plate 431 fixed to the outer wall of the middle cylinder 42 and a movable plate 432 rotatably connected to the outer wall of the middle cylinder 42 through a swivel 433. The fixed plate 431 is rotatably connected to a screw rod 434 on one side close to the movable plate 432 through a motor 435. The outer wall of the screw rod 434 is threadedly connected to a slide seat 436. A straight connecting rod 437 is connected between the slide seat 436 and the movable plate 432.

[0045] Furthermore, a weighing screw conveyor 52 is connected between the mixing device 4 and the extruder 5 .

[0046] Furthermore, the output end of the cutting device 81 is connected to a side material recovery device 91 which is parallel to the winding device 9 .

[0047] An embodiment of the present invention:

[0048] The batching bin 1 is arranged under the ground, so that the staff can conveniently put the raw materials in. The raw materials in the batching bin 1 are transported to the bucket elevator 2 through the first conveying auger 11. The bucket elevator 2 lifts the raw materials to a height and transports them to the dryer 22 for drying and removing moisture. The dried raw materials are transported to the rotary distributor 31 through the buried scraper conveyor 21. There are many kinds of raw materials. The raw materials are transported to the corresponding batching bins through the rotary distributor 31 according to the corresponding kinds. The batching bins with different raw materials constitute the batching bin group 3.

[0049] The bottoms of several batching bins are connected to the feed port 411 of the temporary storage bin 41 through one-to-one corresponding second conveying auger 32. The interior of the temporary storage bin 41 is hollow with an opening at the bottom. A middle cylinder 42 is provided downwardly extending from the middle of the inner top wall of the temporary storage bin 41. The middle cylinder 42 has a circular structure and is coaxial with the inner cavity of the circular structure of the temporary storage bin 41. Several partitions 43 are provided between the outer wall of the middle cylinder 42 and the inner wall of the temporary storage bin 41. The partitions 43 adjacent to each other form a buffer space. One group of buffer spaces corresponds to one group of feed ports 411 and one group of second conveying auger 32. A telescopic device 44 is installed inside the middle cylinder 42. The device 44 can adopt an electric telescopic rod, and a hinge seat 441 is installed at the output end of the telescopic device 44. A plurality of bottom plates 45 are hinged at the bottom of the middle cylinder 42. The bottom of the bottom plate 45 is connected to the hinge seat 441 through a one-to-one corresponding curved connecting rod 46. Therefore, the extension and retraction of the telescopic device 44 simultaneously drives the plurality of bottom plates 45 to rotate synchronously, thereby realizing the simultaneous opening or closing of the corresponding bottom openings of the buffer space. The space in the buffer space is limited, so that the volume of the raw materials contained in the buffer space is constant. Therefore, after the bottom openings of the plurality of buffer spaces are opened at the same time, the ratio of different raw materials entering the mixing device 4 remains unchanged.

[0050] In order to adjust the ratio of different raw materials, the motor 435 is controlled by an external control switch to drive the screw rod 434 to rotate. The rotation of the screw rod 434 drives the slide 436 to slide linearly on the fixed plate 431. One end of the straight connecting rod 437 is hinged to the slide 436, and the other end of the straight connecting rod 437 is hinged to the movable plate 432. The fixed plate 431 is fixedly connected to the temporary storage bin 41 and the middle cylinder 42, and the movable plate 432 is rotatably connected to the temporary storage bin 41 and the middle cylinder 42 through the swivel 433. The sliding of the slide 436 drives the movable plate 432 to rotate relative to the middle cylinder 42 through the straight connecting rod 437, thereby adjusting the size of the buffer space formed between two adjacent partitions 43. The buffer space has a regular fan-shaped structure, which is convenient for calculating the space size.

[0051] Different raw materials are mixed by the mixing device 4 and then transported to the extruder 5 through the weighing screw conveyor 52; the weighing screw conveyor 52 can weigh the transported mixed raw materials, and the heating device 51 arranged on the outer wall of the extruder 5 heats and melts the raw materials. The molten raw materials are extruded through the die head to form a sheet-like film structure. At this time, the sheet-like film structure has a certain temperature, and is transported to the stretching device 6 by the traction of the traction device 7. The film is stretched by the stretching device 6, water-cooled or air-cooled by the cooling device 8, and the thickness of the cooled film is measured by the thickness gauge 82, and then the stress is eliminated by the stress elimination device 83. After that, the film is cut by the cutting device 81 to keep the width consistent, and finally it is wound by the winding device 9, and the leftovers are recovered by the edge material recovery device 91;

[0052] The structure of the stress relief device 83 is as follows: Fig.13 As shown, the film snakes around several rollers and passes through the first roller, the second roller, the third roller, the fourth roller, and the fifth roller in sequence. After the film passes through these rollers, the several rollers transmit the film through a relative speed difference, so that the film is not easily deformed and stress is eliminated.

[0053] The mixing device 4, the extruder 5, the pulling device 7, the cooling device 8, the cutting device 81, the winding device 9 and the edge material recovery device 91 are all existing structures and will not be described any more.

[0054] The stretching device 6 includes a mounting plate 61, a rotating shaft 62 rotatably connected to the mounting plate 61, and a horizontal plate 63 whose middle part is fixed to the front end of the rotating shaft 62 and is located at the front side of the mounting plate 61. Both ends of the horizontal plate 63 are freely rotatably connected with movable rotating drums 64, and the rotating axis of the rotating drum 64 is parallel to the rotating axis of the rotating shaft 62. Four groups of fixed rotating drums 65 are rotatably connected to the front side of the mounting plate 61, and the rotating axis of the fixed rotating drums 65 is parallel to the rotating axis of the rotating shaft 62. Two groups of fixed rotating drums 65 are located on the left side of the horizontal plate 63, and the other two groups of fixed rotating drums 65 are located on the right side of the horizontal plate 63. The film passes between the two groups of fixed rotating drums 65 on the same side.

[0055] The first gear 66 is fixed to the rear end of the rotating shaft 62 and is located at the rear side of the mounting plate 61. The first rack 67 is linearly slidably connected to the rear side wall of the mounting plate 61. The first gear 66 and the first rack 67 are meshed. A telescopic link 68 is hinged at the right end, and the other end of the telescopic link 68 is hinged to the edge of the rotating wheel 609. The rotating device 68 is installed at the rear side of the mounting plate 61 to drive the rotating wheel 609 to rotate. The rotating wheel 609 rotates through the telescopic link 68 to drive the first rack 67 to move back and forth linearly. The intermittent driving device 611 is installed at the rear side of the mounting plate 61. A one-way intermittent motion mechanism composed of an active dial and a groove wheel can be used. The intermittent driving device 611 drives the turntable 612 to move intermittently. A circular array of limit blocks 613 is provided on one side of the turntable 612 close to the first rack 67. The lengths of the limit blocks 613 of the circular array are different along the axis direction of the turntable 612, and the lengths of the limit blocks 613 of the circular array decrease in sequence to form a circle. Each reciprocating movement of the first rack 67 corresponds to one rotation of the turntable 612 by the intermittent driving device 611.

[0056] The first rack 67 abuts against one of the groups of limit blocks 613 during the process of moving to the left, during which the telescopic link 68 is shortened accordingly, and the limit blocks 613 of different lengths abut against the first rack 67, thereby controlling the rotation angle of the rotating shaft 62; the first rack 67 first abuts against the longest limit block 613, at which time the rotation angle of the rotating shaft 62 is the smallest, and then the first rack 67 abuts against the limit blocks 613 of decreasing lengths in sequence, so that the rotation angle of the rotating shaft 62 becomes larger in sequence at equal intervals, and the first rack 67 abuts against the shortest limit block 613 and then against the longest limit block 613 to form a cycle;

[0057] The rotation of the rotating shaft 62 drives the movable rotating drums 64 on both sides to rotate around the rotating shaft 62 through the horizontal plate 63. There are two groups of movable rotating drums 64 on one side. The film passes through the two groups of movable rotating drums 64 on the same side, so that the movable rotating drums 64 rotate around the rotating shaft 62 with increasing angles, driving the passing film to stretch, which is conducive to stretching the film in a larger range in one direction.

[0058] The telescopic link 68 includes an outer cylinder 681, a second rack 682 that slides linearly relative to the outer cylinder 681, the second rack 682, and a first elastic member 683 arranged inside the outer cylinder 681. The first elastic member 683 adopts a compression spring. The elastic member of the first elastic member 683 makes the second rack 682 tend to move away from the outer cylinder 681 to lengthen the telescopic link 68. When the first rack 67 abuts against one set of limit blocks 613, the second rack 682 retracts into the outer cylinder 681 and compresses the first elastic member 683 to generate a reverse elastic force.

[0059] A second gear 684 meshing with the second rack 682 is rotatably connected inside the outer cylinder 681, a one-way wheel 685 is installed inside the outer cylinder 681, an electromagnetic clutch 686 is connected between the second gear 684 and the one-way wheel 685, and the electromagnetic clutch 686 adopts a normally closed tooth electromagnetic clutch. Under normal circumstances, due to the restriction of the one-way wheel 685, the second rack 682 cannot be retracted into the outer cylinder 681, but the second rack 682 can be outwardly away from the outer cylinder 681, which is beneficial to keep the length of the telescopic connecting rod 68 from being shortened by external forces; the intermittent driving device 611 is connected to the turntable 612 through the transverse axis 614, the turntable 612 cannot rotate relative to the transverse axis 614, but the turntable 612 can move a certain distance along the axial direction of the transverse axis 614, the outer wall of the transverse axis 614 is sleeved with a second elastic member 615, and a switch 616 for controlling the electromagnetic clutch 686 is provided, and the second gear 684 is meshed with the second rack 682. When it abuts against the limit block 613, it drives the turntable 612 to move a small distance on the horizontal axis 614 and compresses the second elastic member 615. During this process, the movement of the turntable 612 triggers the switch 616. The switch 616 can use a travel switch to control the electromagnetic clutch 686 to disengage the one-way wheel 685 and the second gear 684. At this time, the turntable 612 cannot move further when the horizontal axis 614 moves to the end, so that the second rack 682 extends into the outer cylinder 681 to shorten the length of the telescopic connecting rod 68; after the first rack 67 is disengaged from the limit block 613, the turntable 612 is driven by the elastic force of the second elastic member 615 to move and reset relative to the horizontal axis 614, so that the turntable 612 disengages from the switch 616, so that the switch 616 controls the electromagnetic clutch 686 to work, so that the one-way wheel 685 and the second gear 684 are reconnected.

[0060] In the present invention, the electrical device is connected to an external power source via an external control switch.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A POE solar backing film production line, characterized by: It comprises a batching bin (1), a first conveying auger (11), a bucket elevator (2), a drying machine (22), a buried scraper conveyor (21), a rotary distributor (31), a batching bin group (3), a mixing device (4), an extruder (5), a traction device (7), a stretching device (6), a cooling device (8), a thickness gauge (82), a stress relief device (83), a cutting device (81) and a winding device (9) which are connected in sequence; The stretching device (6) comprises a mounting plate (61), a rotating shaft (62) rotatably connected to the mounting plate (61), a horizontal plate (63) fixed to one end of the rotating shaft (62), two sets of movable rotating cylinders (64) rotatably connected to the two ends of the horizontal plate (63) in parallel with the axis of the rotating shaft (62), and a fixed rotating cylinder (65) rotatably connected to the mounting plate (61); A first gear (66) is fixed to the other end of the rotating shaft (62); a first rack (67) is provided which slides on the mounting plate (61) and meshes with the first gear (66); and a rotating wheel (609) is driven to rotate by a rotating device (610); a telescopic connecting rod (68) is hinged between the edge of the rotating wheel (609) and one end of the first rack (67); and a rotating disk (612) is connected to the rotating disk (612) in an intermittent rotational manner driven by an intermittent driving device (611); the rotating disk (612) has a ring array of limit blocks (613) centered on its axis, and the limit blocks (613) are arranged in decreasing lengths in the direction of rotation; the other end of the first rack (67) slides closer to or farther away from the limit block (613); The telescopic connecting rod (68) comprises an outer cylinder (681), a second rack (682) linearly slidably connected to the outer cylinder (681), and a first elastic member (683) disposed inside the outer cylinder (681), wherein the elastic force of the first elastic member (683) drives the second rack (682) to move away from the outer cylinder (681); A second gear (684) meshing with the second rack (682) is rotatably connected inside the outer cylinder (681), a one-way wheel (685) is installed inside the outer cylinder (681), and the second gear (684) and the one-way wheel (685) are connected to or separated from each other via an electromagnetic clutch (686); The intermittent drive device (611) drives the transverse axis (614) to intermittently move, and the turntable (612) moves on the transverse axis (614) along the axis direction of the transverse axis (614). A second elastic member (615) is sleeved on the outer wall of the transverse axis (614), and the elastic force of the second elastic member (615) drives the turntable (612) to approach the first rack (67). A switch (616) electrically connected to the electromagnetic clutch (686) is provided.

2. A POE solar backing sheet film production line according to claim 1, characterized in that: A temporary storage bin (41) is provided between the batching bin group (3) and the mixing device (4), and each group of batching bins in the batching bin group (3) is connected to the temporary storage bin (41) via a one-to-one corresponding second conveying auger (32).

3. A POE solar backing sheet film production line according to claim 2, characterized in that: A middle cylinder (42) is arranged in the temporary storage bin (41), and a plurality of partitions (43) are arranged between the outer wall of the middle cylinder (42) and the inner wall of the temporary storage bin (41). Two adjacent partitions (43) form mutually independent buffer spaces and correspond one to one with the second conveying auger (32). A closing mechanism is provided for simultaneously opening or closing the openings below the plurality of buffer spaces.

4. A POE solar backing sheet film production line according to claim 3, characterized in that: The closing mechanism comprises a telescopic device (44) installed inside the middle cylinder (42); a hinge seat (441) is installed at the output end of the telescopic device (44); a plurality of bottom plates (45) corresponding to the buffer spaces are hingedly connected to the bottom of the middle cylinder (42); the bottom plates (45) are hingedly connected to the hinge seat (441) via a hinged curved connecting rod (46).

5. A POE solar backing sheet film production line according to claim 4, characterized in that: The partition (43) comprises a fixed plate (431) fixed to the outer wall of the middle cylinder (42) and a movable plate (432) rotatably connected to the outer wall of the middle cylinder (42) via a rotating ring (433); a screw rod (434) is rotatably connected to the side of the fixed plate (431) close to the movable plate (432) via a motor (435); a slide seat (436) is threadedly connected to the outer wall of the screw rod (434); and a straight connecting rod (437) is connected between the slide seat (436) and the movable plate (432).

6. A POE solar backing sheet film production line according to claim 5, characterized in that: A weighing screw conveyor (52) is connected between the mixing device (4) and the extruder (5).

7. A POE solar backing sheet film production line according to claim 1, characterized in that: The output end of the cutting device (81) is connected to a side material recovery device (91) which is parallel to the winding device (9).

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