White backboard base film and backboard base film stretching equipment thereof

Abstract

The invention belongs to the technical field of backboard base film production equipment, and particularly relates to a white backboard base film and backboard base film stretching equipment thereof. The stretching assembly is arranged in the cavity; the material guiding assemblies are arranged on the two side wall faces of the cavity and guide the back plate to penetrate through the stretching assembly; the temperature control device is arranged in the cavity; wherein vacuumizing equipment is arranged on the upper side of the box body.

Description

Technical Field

[0001] The invention belongs to the technical field of backplane base film production equipment, and in particular relates to a white backplane base film stretching equipment. Background Art

[0002] The cross-section of a solar panel has five layers: photovoltaic glass, EVA, solar cells, EVA and a backplane. The solar cell backplane is located on the back of the solar panel, protecting and supporting the cells. It has reliable insulation, water resistance and aging resistance. It generally has a three-layer structure (PVDF / PET / PVDF). The outer protective layer PVDF has good resistance to environmental erosion. The middle layer is PET polyester film with good insulation properties. The inner layer PVDF and EVA have good bonding properties.

[0003] In order to improve the performance of the existing backplane base film, it is often stretched after production. However, the existing factories often carry out the base film stretching process in an open environment, which is easily affected by the external environment. Therefore, we specially designed a white backplane base film and its backplane base film stretching equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a white backplane base film stretching device in order to solve the above-mentioned technical problems, thereby achieving the effect of improving the base film stretching environment.

[0005] In view of this, the present invention provides a white backplane base film and a backplane base film stretching device thereof, comprising:

[0006] A box body, wherein a cavity is arranged in the box body;

[0007] A stretching component, the stretching component is arranged in the cavity;

[0008] A material guiding assembly, which is arranged on the two side walls of the cavity and guides the back plate to pass through the stretching assembly;

[0009] A temperature control device, the temperature control device is arranged in the cavity;

[0010] Among them, a vacuum pumping device is arranged on the upper side of the box.

[0011] In the above technical solution, further, the stretching component includes:

[0012] Stretching rollers;

[0013] Feeding roller;

[0014] Receiving roller;

[0015] Among them, the feeding roller and the receiving roller are arranged at both ends of the cavity and are both connected to a motor, a plurality of stretching rollers are arranged between the feeding roller and the receiving roller, and the material guide assembly guides the back plate base film to pass through the plurality of stretching rollers in an interlaced manner;

[0016] Wherein, the stretching roller comprises:

[0017] A rotating shaft, with rotating disks connected to both ends of the rotating shaft, and the rotating disks are fixed to the wall of the cavity;

[0018] Fixed disks, two fixed disks are symmetrically arranged on the rotating shaft, and a plurality of grooves are arranged in a circumferential array on the fixed disks, and columns are arranged in the grooves;

[0019] The stretching frame is connected to the cutting groove and the upright column, and a spring is arranged on the upright column inside the stretching frame.

[0020] In the above technical solution, further, the material guide component includes:

[0021] Guide rails, which are arranged on the walls on both sides of the cavity;

[0022] The magnetic driving component is arranged on the guide rail and is connected with a clamping component.

[0023] In the above technical solution, further, the magnetic driving member includes:

[0024] A magnetic module, the magnetic module is laid on the guide rail;

[0025] A suspension component is arranged on the guide rail and connected to the clamping member, and the suspension component cooperates with the magnetic module;

[0026] The controller is connected to the magnetic module and controls the change of the positive and negative poles of the magnetic module.

[0027] In the above technical solution, further, the magnetic module includes:

[0028] A body, wherein a groove is arranged on the body;

[0029] A rubber block, the rubber block is connected to the groove;

[0030] Among them, the main body is an electromagnet.

[0031] In the above technical solution, further, the individual magnetic modules are individually controlled by the controller.

[0032] In the above technical solution, further, the suspension component includes:

[0033] A bracket, wherein a first branch and a second branch are provided at one end of the bracket;

[0034] A roller, which is arranged on the first branch and the second branch;

[0035] A magnetic block, which is disposed between the first branch and the second branch and produces magnetic cooperation with the magnetic module;

[0036] Wherein, a rubber sleeve is arranged on the outer side of the roller, and a tooth-shaped protrusion is arranged on the rubber sleeve.

[0037] In the above technical solution, further, the clamping member includes:

[0038] A connecting plate, both ends of which are connected to the second branch;

[0039] The clamping plate is arranged on the connecting plate and matched with the connecting plate through bolts.

[0040] In the above technical solution, further, it also includes:

[0041] The limiting protrusions are arranged on the guide rails, and the body is arranged between the limiting protrusions.

[0042] In the above technical solution, further, a white backplane base film with one side coated and the other side composite is provided, and after being stretched, the light transmittance of the composite surface and the coated surface is stable.

[0043] The beneficial effects of the present invention are: the vacuum equipment performs vacuum operation on the cavity, so that the backplane base film is stretched in a vacuum environment, and at the same time the vacuum environment in the cavity helps the temperature control device to adjust the temperature, thereby saving energy consumption and effectively reducing the influence of the processing environment on the stretching of the backplane base film. Furthermore, precise temperature control helps to improve the stretching effect of the backplane base film. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the present invention;

[0045] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0046] Figure 3 is a schematic diagram of a magnetic drive member of the present invention;

[0047] Figure 4 is a schematic diagram of a stretching roller of the present invention;

[0048] Figure 5 is a control logic diagram of the controller of the present invention;

[0049] The markings in the figure are as follows: 1. box body; 11. cavity; 2. stretching assembly; 21. stretching roller; 211. rotating shaft; 212. fixed plate; 2121. cutting groove; 2122. column; 213. stretching frame; 214. spring; 22. feeding roller; 23. receiving roller; 3. material guide assembly; 31. guide rail; 32. magnetic drive component; 321. magnetic module; 3211. body; 3212. rubber block; 322. suspension assembly; 3221. bracket; 32211. first branch; 32222. second branch; 3223. roller; 3224. magnetic block; 333. controller; 34. clamping member; 341. connecting plate; 342. splint; 4. temperature control device; 5. limiting protrusion; 6. first movable door; 7. second movable door; 8. third movable door. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0051] Embodiment 1:

[0052] This embodiment provides a white backplane base film and a backplane base film stretching device thereof, including:

[0053] A box body 1, wherein a cavity 11 is provided in the box body 1;

[0054] A stretching component 2, the stretching component 2 is arranged in the cavity 11;

[0055] A material guiding assembly 3, which is arranged on the two side walls of the cavity 11 and guides the back plate to pass through the stretching assembly 2;

[0056] A temperature control device 4, which is disposed in the cavity 11;

[0057] Wherein, a vacuum pumping device is arranged on the upper side of the box body 1 .

[0058] It can be seen from this embodiment that a white backplane base film and a backplane base film stretching device thereof include a box body 1, a stretching component 2, a material guide component 3 and a vacuum pumping device;

[0059] A cavity 11 is formed in the box body 1, and a vacuum pumping device and a temperature control device 4 are installed on the box body 1;

[0060] Furthermore, a sealed first movable door 6 is provided on one side of the box body 1. When in use, the backboard base film roll is placed into the cavity 11 through the first movable door 6;

[0061] The stretching assembly 2 is installed in the cavity 11, and the stretching assembly 2 is connected to the back sheet base film roll and stretches the back sheet base film roll;

[0062] The material guide assembly 3 is installed in the cavity 11, and the material guide assembly 3 crosses the stretching assembly 2, thereby extending the travel distance of the back sheet base film roll on the stretching assembly 2, thereby helping to improve the stretching effect;

[0063] When in use, the vacuum equipment performs a vacuum operation on the cavity 11, so that the backplane base film is stretched in a vacuum environment. At the same time, the vacuum environment in the cavity 11 helps the temperature control device 4 to adjust the temperature, thereby saving energy consumption and effectively reducing the impact of the processing environment on the stretching of the backplane base film. Furthermore, precise temperature control helps to improve the stretching effect of the backplane base film.

[0064] Embodiment 2:

[0065] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] The stretching component 2 includes:

[0067] Stretching roller 21;

[0068] Feeding roller 22;

[0069] Receiving roller 23;

[0070] Among them, the feeding roller 22 and the receiving roller 23 are arranged at both ends of the cavity 11, and are both connected to a motor, a plurality of stretching rollers 21 are arranged between the feeding roller 22 and the receiving roller 23, and the material guide assembly 3 guides the backplane base film to pass through the plurality of stretching rollers 21 in an interlaced manner;

[0071] The stretching roller 21 comprises:

[0072] A rotating shaft 211, with rotating disks connected to both ends of the rotating shaft 211, and the rotating disks are fixed to the wall of the cavity 11;

[0073] Fixed disks 212, two fixed disks 212 are symmetrically arranged on the rotating shaft 211, and a plurality of slots 2121 are arranged in a circumferential array on the fixed disks 212, and columns 2122 are arranged in the slots 2121;

[0074] The stretching frame 213 is connected to the cut groove 2121 and connected to the column 2122 , and a spring 214 is provided on the column 2122 inside the stretching frame 213 .

[0075] This example shows that

[0076] It can be seen from this embodiment that the stretching assembly 2 includes a stretching roller 21, a feeding roller 22 and a receiving roller 23;

[0077] The feeding roller 22 is installed on one side of the box body 1 with the first movable door 6, the receiving roller 23 is installed on the other end, and the stretching roller 21 is installed between the feeding roller 22 and the stretching roller 21. Furthermore, the box body 1 is provided with a sealed second movable door 7 corresponding to the receiving roller 23, and the two ends of the box body 1 are provided with third movable doors 8 corresponding to the feeding roller 22 and the receiving roller 23. The third movable door 8 is used to cooperate with the material guide component 3 to clamp the back plate base film for use;

[0078] When in use, the backplane base film roll is placed into the box body 1 through the first movable door 6 and connected to the loading roller 22. The material guide assembly 3 is displaced to one end of the loading roller 22, and the backplane base film roll and the material guide assembly 3 are manually fixed by the first movable door 6. Then, the material guide assembly 3 guides the backplane base film to move to the receiving roller 23, and the backplane base film and the receiving roller 23 are manually fixed by the second movable door 7. At this time, the motor at the receiving roller 23 is started, and the receiving roller 23 rolls the backplane base film through the stretching roller 21 and is stretched. At the same time, after the winding roller completely winds up the backplane base film, the motor at the winding roller can be turned off, and the motor at the loading roller 22 can be started, so that the backplane base film is retracted, and the backplane base film is stretched twice during the retraction process, thereby improving the stretching effect.

[0079] When the stretching roller 21 is in use, the stretching frame 213 is elastically fitted with the spring 214 in the cutting groove 2121 to stretch the back panel base film as it passes through, and the back panel base film is in flexible contact with the stretching frame 213 during the stretching process, thereby preventing the back panel base film from cracking during the stretching process.

[0080] Embodiment 3:

[0081] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0082] The material guide assembly 3 comprises:

[0083] Guide rails 31, which are arranged on the walls on both sides of the cavity 11;

[0084] The magnetic driving member 32 is disposed on the guide rail 31 and is connected to a clamping member 34 .

[0085] It can be seen from this embodiment that the material guide assembly 3 includes a guide rail 31, a magnetic drive member 32 and a clamping member 34;

[0086] The guide rails 31 are arranged on the walls of both sides of the cavity 11 and are staggered along the stretching rod to form a serpentine structure;

[0087] The magnetic driving member 32 is connected to the guide rail 31, and a clamping member 34 is connected to the magnetic driving member 32. The clamping member 34 is used to connect to the back panel base film when in use, and when the magnetic driving member 32 moves along the guide rail 31, the clamping member 34 is driven to move, thereby controlling the movement of the back panel base film.

[0088] Embodiment 4:

[0089] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0090] The magnetic drive member 32 comprises:

[0091] A magnetic module 321, wherein the magnetic module 321 is laid on the guide rail 31;

[0092] A suspension component 322, which is disposed on the guide rail 31 and connected to the clamping member 34, and cooperates with the magnetic module 321;

[0093] The controller 333 is connected to the magnetic module 321 and controls the positive and negative polarity changes of the magnetic module 321 .

[0094] It can be seen from this embodiment that the magnetic driving member 32 includes a magnetic module 321, a suspension component 322 and a controller 333;

[0095] The magnetic module 321 is installed on the guide rail 31, the suspension component 322 is connected to the guide rail 31 and is magnetically matched with the magnetic module 321. The controller 333 is used to control the operation of the magnetic module 321, and the magnetic module 321 is connected to the controller 333 through an eddy current sensor. When in use, the controller 333 adjusts the change of the magnetic poles on the magnetic module 321 to control the movement of the suspension component 322 on the guide rail 31, thereby achieving the purpose of guiding materials.

[0096] Embodiment 5:

[0097] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0098] The magnetic module 321 includes:

[0099] The body 3211 is provided with a groove;

[0100] A rubber block 3212, the rubber block 3212 is connected to the groove;

[0101] The main body 3211 is an electromagnet.

[0102] It can be seen from this embodiment that the magnetic module 321 includes a body 3211, a rubber block 3212 and a coil;

[0103] The main body 3211 is an electromagnet and is attached to the guide rail 31. A groove is formed on the main body 3211, and a rubber block 3212 is connected to the groove.

[0104] When in use, the rubber block 3212 forms a plurality of protrusions on the guide rail 31 , which can limit the movement of the suspension component 322 when the main body 3211 loses its magnetic force, thereby helping to improve the use effect.

[0105] Embodiment 6:

[0106] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0107] The individual magnetic modules 321 are individually controlled by the controller 333 .

[0108] It can be seen from the present embodiment that the magnetic modules 321 and the controller 333 are independently controlled and powered by an independent circuit, so that during use, it is convenient to control the motor of the independent magnetic module 321 to adjust the displacement of the suspension component 322 by suction, thereby achieving the effect of controlling the displacement of the suspension component 322 (the suction suspension technology is widely used in suspension trains, which utilizes the magnetic field generated by the electromagnet to attract the guide magnet on the track to suspend the train. This form can also generate suspension force when stationary).

[0109] Embodiment 7:

[0110] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0111] The suspension assembly 322 includes:

[0112] A bracket 3221, wherein one end of the bracket 3221 is provided with a first branch and a second branch;

[0113] Roller 3223, roller 3223 is arranged on the first branch and the second branch;

[0114] A magnetic block 3224, which is disposed between the first branch and the second branch and produces magnetic cooperation with the magnetic module 321;

[0115] Among them, a rubber sleeve is arranged on the outer side of the roller 3223, and a tooth-shaped protrusion is arranged on the rubber sleeve.

[0116] It can be seen from this embodiment that the suspension assembly 322 includes a bracket 3221, a roller 3223 and a magnetic block 3224;

[0117] A first branch and a second branch are formed at one end of the bracket 3221, and the first branch 32211 and the second branch 32222 are hinged and fixed, the roller 3223 is connected to both the first branch and the second branch, the magnetic block 3224 is arranged between the first branch and the second branch, and when in use, the roller 3223 is driven to move along the guide rail 31 by the suction force of the magnetic module 321 at the front end or the rear end.

[0118] Embodiment 8:

[0119] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0120] The clamping member 34 comprises:

[0121] A connecting plate 341, both ends of which are connected to the second branch;

[0122] The clamping plate 342 is disposed on the connecting plate 341 and is matched with the connecting plate 341 through bolts.

[0123] It can be seen from this embodiment that the clamping member 34 includes a main body, a connecting plate 341 and a clamping plate 342;

[0124] The connecting plate 341 is fixed to the bracket 3221 by bolts, and is also fixed to the clamping plate 342 by bolts;

[0125] When in use, by adjusting the tightness of the bolts between the clamping plate 342 and the connecting plate 341, a clamping gap is formed between the clamping plate 342 and the connecting plate 341. The clamping gap controls the tightness of the clamping plate 342 and the connecting plate 341 through the bolts to clamp the backplane base film.

[0126] Embodiment 9:

[0127] This embodiment provides a backplane base film stretching device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0128] The limiting protrusions 5 are arranged on the guide rails 31 , and the body 3211 is arranged between the limiting protrusions 5 .

[0129] It can be seen from the present embodiment that the limiting protrusion 5 is provided on the guide rail 31 to limit and fix the main body 3211, thereby facilitating the installation of the magnetic module 321 and facilitating the control of the magnetic force range of the magnetic module 321.

[0130] Embodiment 10:

[0131] This embodiment provides a white backplane base film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0132] A white back sheet base film has stable light transmittance on its composite surface and coating surface after being stretched.

[0133] It can be seen from this embodiment that a composite white backplane base film with one side coated is directly coated on the surface of the PET substrate with a fluorocarbon coating with fluororesin as the main component on one side to form a film, and the other side is bonded to the fluorine-containing backplane. Since the coating process temperature is relatively high, the coating process is usually used to attach the fluorine coating to the middle layer, and then the outer layer is bonded to the middle layer with glue.

[0134] 2. Selection of white coating formula for the coating surface: Select appropriate fluororesin and silicon dioxide or titanium dioxide powder and grind them by three rollers to obtain white resin, then add anti-ultraviolet oxidant, ultraviolet absorber and anti-hydrolysis additives to obtain white backplane coating formula.

[0135] 3. The raw materials of the fluorine-containing polymer coating include the following components in mass ratio: 30-55% of fluorine-containing coating; 20-40% of solvent; 2-6% of crosslinking agent and curing agent; 15-40% of filler;

[0136] 4. Then bond it with the F-containing transparent back sheet. The fluorine-containing films only include DuPont's PVF film and PVDF film;

[0137] 5. Reflectivity (400-1100nm) ≥ 75%;

[0138] 6. Tensile strength: TD ≥ 120MPa; MD ≥ 120MPa; Elongation at break: TD ≥ 100%, MD ≥ 120%;

[0139] 7. The water vapor transmission rate of this back sheet (38°C×90%RH) ≤2.0g / (m2·day);

[0140] 8.2000H yellowing △b≤2.0;

[0141] 9. In the wet heat aging test (DH2000H), there is no delamination or blistering, and the surface and adhesive layer are not sticky; the elongation at break retention rate is ≥80%, and the yellowing △b is ≤2.0.

[0142] After production, the base film is stretched to extend its own ductility, so that during subsequent use, the light transmittance will not be affected by stretching due to external factors, thereby enhancing the effect of the base film.

[0143] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A white backplane base film and a backplane base film stretching device, characterized in that: include: A box body (1), wherein a cavity (11) is provided in the box body (1); A stretching assembly (2), wherein the stretching assembly (2) is arranged in the cavity (11); A material guiding assembly (3), wherein the material guiding assembly (3) is arranged on the two side walls of the cavity (11) and guides the back plate to pass through the stretching assembly (2); A temperature control device (4), wherein the temperature control device (4) is arranged in the cavity (11); Wherein, a vacuum extraction device is arranged on the upper side of the box body (1).

2. The white backplane base film and backplane base film stretching device according to claim 1, characterized in that: The stretching assembly (2) comprises: A stretching roller (21); Feeding roller (22); A receiving roller (23); The feeding roller (22) and the receiving roller (23) are arranged at both ends of the cavity (11) and are both connected to a motor; a plurality of stretching rollers (21) are arranged between the feeding roller (22) and the receiving roller (23); and the material guide assembly (3) guides the backplane base film to pass through the plurality of stretching rollers (21) in an interlaced manner; Wherein, the stretching roller (21) comprises: A rotating shaft (211), with rotating disks connected to both ends of the rotating shaft (211), and the rotating disks are fixed to the wall surface of the cavity (11); A fixed disk (212), wherein two fixed disks (212) are symmetrically arranged on the rotating shaft (211), and a plurality of grooves (2121) are arranged in a circumferential array on the fixed disk (212), and columns (2122) are arranged in the grooves (2121); The stretching frame (213) is connected to the cutting groove (2121) and connected to the column (2122), and a spring (214) is arranged on the column (2122) inside the stretching frame (213).

3. The white backplane base film and backplane base film stretching device according to claim 2, characterized in that: The material guide assembly (3) comprises: Guide rails (31), wherein the guide rails (31) are arranged on the wall surfaces on both sides of the cavity (11); A magnetic driving member (32), wherein the magnetic driving member (32) is arranged on the guide rail (31) and is connected to a clamping member (34).

4. The white backplane base film and backplane base film stretching device according to claim 3, characterized in that: The magnetic drive member (32) comprises: A magnetic module (321), wherein the magnetic module (321) is laid on the guide rail (31); A suspension component (322), wherein the suspension component (322) is disposed on the guide rail (31) and connected to the clamping member (34), and the suspension component (322) cooperates with the magnetic module (321); A controller (333), wherein the controller (333) is connected to the magnetic module (321) and controls the positive and negative polarity changes of the magnetic module (321).

5. The white backplane base film and backplane base film stretching device according to claim 4, characterized in that: The magnetic module (321) comprises: A body (3211), wherein the body (3211) is provided with a groove; A rubber block (3212), wherein the rubber block (3212) is connected to the groove; Wherein, the main body (3211) is an electromagnet.

6. The white backplane base film and backplane base film stretching device according to claim 5, characterized in that: The individual magnetic modules (321) are individually controlled by a controller (333).

7. The white backplane base film and backplane base film stretching device according to claim 6, characterized in that: The suspension assembly (322) includes: A bracket (3221), wherein one end of the bracket (3221) is provided with a first branch (32211) and a second branch (32222); A roller (3223), wherein the roller (3223) is disposed on both the first branch (32211) and the second branch (32222); A magnetic block (3224), wherein the magnetic block (3224) is disposed between the first branch (32211) and the second branch (32222) and generates magnetic cooperation with the magnetic module (321); Wherein, a rubber sleeve is arranged on the outer side of the roller (3223), and a tooth-shaped protrusion is arranged on the rubber sleeve.

8. The white backplane base film and backplane base film stretching device according to claim 7, characterized in that: The clamping member (34) comprises: A connecting plate (341), wherein both ends of the connecting plate (341) are connected to the second branch (32222); A clamping plate (342), wherein the clamping plate (342) is arranged on the connecting plate (341) and matched with the connecting plate (341) through bolts.

9. The white backplane base film and backplane base film stretching device according to claim 8, characterized in that: include: The limiting protrusions (5) are arranged on the guide rails (31), and the body (3211) is arranged between the limiting protrusions (5).

10. A white backplane base film according to claims 1-9, characterized in that: A white backboard base film with one side coated and the other side composited, after being stretched, the light transmittance of the composite surface and the coated surface is stable.

Images