Automatic heating control device of cutting machine and cutting machine
By designing an automatic heating control device in the cutting machine, the heating time of the EVA film is accurately controlled, and the problem of wrinkles occurring when the film is heated and cooled is solved, and the yield of photovoltaic modules is improved.
Patent Information
- Application Number
- CN202421840385.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-31
AI Technical Summary
During the production process of photovoltaic modules, the EVA film stays on the heating plate for too long, causing the film to expand heat and produces slight wrinkles when cooled, which in turn affects the yield of the photovoltaic module.
An automatic heating control device for cutting machines is designed to detect the remaining amount of the adhesive film through sensors, and the heating time of the upper and lower heating components is accurately controlled according to the detection results to reduce the heat expansion of the adhesive film.
By reducing the heat expansion time of the adhesive film, the expansion phenomenon of the adhesive film is suppressed, the yield of photovoltaic modules is improved, and the edge loss and rupture are reduced.
Smart Images
Figure CN222928504U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an automatic heating control device for a cutting machine and a cutting machine. Background Art
[0002] The production and manufacturing process of photovoltaic modules is as follows. The lower EVA film is laid on the lower glass, then the battery cells are placed on the lower EVA film, then the upper EVA film is laid on the battery cells, and then the upper glass is covered on the upper EVA film.
[0003] The EVA film is in a roll. The free end of the EVA film passes through the gap between the upper heating plate and the lower heating plate of the cutting machine. After the free end of the EVA film is pulled by the traction device and the EVA film is stretched by a set length, the EVA film is cut off by the blade of the cutting machine, and then the cut EVA film is adsorbed by the adsorption device and placed on the lower glass or the battery cells.
[0004] The lower heating plate and the upper heating plate of the existing equipment are always in a heating state, but the upper heating plate is driven by a cylinder to be lifted away from the EVA film under normal conditions. When the remaining length of the previous roll of EVA film is not enough to cover the entire lower glass or battery cells, the next roll of EVA film is added. The free end of the next roll of EVA film is spliced with the tail of the previous roll of EVA film, and then the upper heating plate is lowered. The two heating plates heat the joint of the front and rear rolls of EVA film at the same time, so as to connect the ends of the two rolls of EVA film together.
[0005] The inventor's research found that during the production of photovoltaic modules, since the EVA film stays on the lower heating plate for a period of time and the EVA film expands when heated, when the EVA film is laid on the lower glass, the EVA film naturally cools and shrinks to produce slight wrinkles, and the typical value of the wrinkle height is 2 mm to 3 mm, and there is a lack of EVA film at the edge of the photovoltaic module.
[0006] In the subsequent lamination process, the lack of EVA film at the edge of the photovoltaic module is likely to cause a lack of support for the upper glass or battery cells in these areas, resulting in the breakage of the photovoltaic module.
[0007] Sometimes it is necessary to use a suction cup to adsorb the battery cells and then put down the battery cells. The purpose is to finely adjust the position of the battery cells. Since the height of the suction cup's movement is preset and the EVA film is uneven, the battery cells are easily squeezed by the raised parts of the EVA film, causing damage to the battery cells.
[0008] All of the above will reduce the yield of photovoltaic modules. Summary of the Utility Model
[0009] The utility model provides an automatic heating control device for a cutting machine and a cutting machine to improve the yield of photovoltaic modules.
[0010] The technical solution of the utility model is as follows: An automatic heating control device for a cutting machine, comprising a sensor, a main controller, an upper heating assembly, a lower heating assembly, a power device and a switch assembly;
[0011] The main controller is respectively connected to the power device, the sensor and the switch assembly. The sensor is used to detect the remaining amount of the adhesive film roll on the cutting machine, and the switch assembly is used to control whether the upper heating assembly and the lower heating assembly start heating;
[0012] The upper heating assembly includes an upper heating sheet, and the lower heating assembly includes a lower heating sheet. The upper heating sheet and the lower heating sheet are arranged oppositely, and the upper heating sheet is located above the lower heating sheet. The power device is used to drive the upper heating sheet to move up and down.
[0013] Optionally, the switch assembly includes a intermediate relay, which includes an intermediate relay coil, a first contact and a second contact. The first end of the intermediate relay coil is connected to an IO port of the main controller, and the second end of the intermediate relay coil is connected to a DC power line or a DC ground wire. The first contact is used to control the on-off between the live wire and the upper heating assembly, and the second contact is used to control the on-off between the live wire and the lower heating assembly.
[0014] Optionally, the upper heating assembly further includes an upper heating controller, which includes a first live wire electrode and a first neutral wire electrode. The first contact is connected between the live wire and the first live wire electrode; the lower heating assembly further includes a lower heating controller, which includes a second live wire electrode and a second neutral wire electrode. The second contact is connected between the live wire and the second live wire electrode; the upper heating controller is connected to the upper heating sheet, the lower heating controller is connected to the lower heating sheet, and the first neutral wire electrode and the second neutral wire electrode are both connected to the neutral wire.
[0015] Optionally, it further includes a first manual switch and a second manual switch. The first manual switch and the first contact are connected in series between the first live wire electrode and the live wire, and the second manual switch and the second contact are connected in series between the second live wire electrode and the live wire.
[0016] Optionally, the sensor is arranged opposite to the outer peripheral surface of the adhesive film roll, and the sensor is fixedly arranged relative to the axis of the adhesive film roll. The sensor is a distance sensor.
[0017] Optionally, the sensor is an ultrasonic sensor.
[0018] Optionally, the sensor is arranged opposite to the end face of the adhesive film roll, and the sensor is an image sensor.
[0019] Optionally, the power unit includes a cylinder.
[0020] Optionally, the power unit includes a stepper motor.
[0021] The technical solution of the present utility model is as follows: A cutting machine includes the above-mentioned automatic heating control device for the cutting machine.
[0022] The automatic heating control device for the cutting machine of the present utility model precisely controls the start and stop time of the heating process, thereby reducing the heating duration, further suppressing the expansion of the adhesive film, and improving the yield of photovoltaic modules. Description of the Drawings
[0023] Figure 1 is the circuit structure diagram of the automatic heating control device for the cutting machine of the present utility model.
[0024] The reference numerals are as follows: L, live wire; N, neutral wire; 24V, DC power supply line; 0V, DC ground wire; KM1, first contact; KM2, second contact; KA, intermediate relay coil; SA1, first manual switch; SA2, second manual switch; L1, first live wire electrode; N1, first neutral wire electrode; L2, second live wire electrode; N2, second neutral wire electrode; 1, upper heating controller; 2, lower heating controller; 3, upper heating sheet; 4, lower heating sheet; 5, total controller; 6, sensor; 7, power unit. Detailed Embodiments
[0025] The following further illustrates the present utility model with specific embodiments, but the protection scope of the present utility model is not limited thereto.
[0026] Figure 1 is the circuit structure diagram of the automatic heating control device for the cutting machine of the present utility model.
[0027] The technical solution of the present utility model is as follows: An automatic heating control device for a cutting machine includes a sensor 6, a total controller 5, an upper heating assembly, a lower heating assembly, a power unit 7, and a switch assembly.
[0028] The total controller 5 is respectively connected to the power unit 7, the sensor 6, and the switch assembly. The sensor 6 is used to detect the remaining amount of the adhesive film roll (such as an EVA adhesive film roll) on the cutting machine, and the switch assembly is used to control whether the upper heating assembly and the lower heating assembly start heating.
[0029] The upper heating assembly includes an upper heating sheet 3, the lower heating assembly includes a lower heating sheet 4, the upper heating sheet 3 and the lower heating sheet 4 are arranged opposite to each other, and the upper heating sheet 3 is located above the lower heating sheet 4. The power unit 7 is used to drive the upper heating sheet 3 to move up and down.
[0030] When the sensor 6 detects that the remaining amount of the adhesive film roll decreases to a set threshold value (such as 10%, 15% or 5%), the total controller 5 sends a start heating signal to the switch assembly, so that the temperature of the upper heating sheet 3 and the lower heating sheet 4 increases. At this time, the distance between the upper heating sheet 3 and the adhesive film in the vertical direction is relatively large, and the temperature increase is a slow process, and the thermal expansion of the adhesive film is relatively small. When the total controller 5 determines that adhesive film splicing is required, or when the staff manually operates and sends a signal to the total controller 5 to notify the total controller 5 that adhesive film splicing is required at present, the total controller 5 sends a control signal to the power device 7, and the power device 7 controls the upper heating sheet 3 to move downward by a set distance according to the received control signal. Thus, the upper heating sheet 3 and the lower heating sheet 4 jointly heat the splicing seam of the adhesive film, and the adhesive film is heated and connected together. After a set time or with the manual operation of the staff, the total controller 5 sends a stop heating signal to the switch assembly, so that the temperature of the upper heating sheet 3 and the lower heating sheet 5 decreases. During the pipeline production process, the thermal expansion amount of the adhesive film is significantly inhibited, which helps to improve the yield.
[0031] Optionally, the switch assembly includes an intermediate relay. The intermediate relay includes an intermediate relay coil KA, a first contact KM1 and a second contact KM2. The first end of the intermediate relay coil KA is connected to an IO port of the total controller 5, and the second end of the intermediate relay coil KA is connected to the DC power line 24V or the DC ground wire 0V. The first contact KM1 is used to control the on-off between the live wire L and the upper heating assembly, and the second contact KM2 is used to control the on-off between the live wire L and the lower heating assembly.
[0032] When the intermediate relay coil KA is powered on, it triggers the first contact KM1 and the second contact KM2 to close, so that the live wire L is conducted with the upper heating assembly to supply power to the upper heating assembly; and the live wire L is conducted with the lower heating assembly to supply power to the lower heating assembly. When the upper heating assembly is powered on, the upper heating sheet 3 starts to heat. When the lower heating assembly is powered on, the lower heating sheet 4 starts to heat.
[0033] Optionally, the upper heating assembly further includes an upper heating controller 1. The upper heating controller 1 includes a first live wire electrode L1 and a first neutral wire electrode N1. The first contact KM1 is connected between the live wire L and the first live wire electrode L1. The lower heating assembly further includes a lower heating controller 2. The lower heating controller 2 includes a second live wire electrode L2 and a second neutral wire electrode N2. The second contact KM2 is connected between the live wire L and the second live wire electrode L2. The upper heating controller 1 is connected to the upper heating sheet 3, and the lower heating controller 2 is connected to the lower heating sheet 4. The first neutral wire electrode N1 and the second neutral wire electrode N2 are both connected to the neutral wire N.
[0034] Optionally, it further includes a first manual switch SA1 and a second manual switch SA2. The first manual switch SA1 and the first contact KM1 are connected in series between the first live wire electrode L1 and the live wire L, and the second manual switch SA2 and the second contact KM2 are connected in series between the second live wire electrode L2 and the live wire L.
[0035] During use, the staff needs to manually control the first manual switch SA1 and the second manual switch SA2 to be in the conducting state, and the automatic heating control device of the cutting machine can normally start the automatic heating control process.
[0036] Optionally, the sensor 6 is disposed opposite to the outer peripheral surface of the adhesive film roll, the sensor 5 is fixedly disposed relative to the axis of the adhesive film roll, and the sensor 6 is a distance sensor. As the adhesive film in the adhesive film roll is consumed, the thickness of the adhesive film will decrease, and the distance between the outer peripheral surface of the adhesive film roll and the sensor 6 will increase. The total controller 5 can map the distance value to the remaining amount of the adhesive film roll.
[0037] The total controller 5 is, for example, a programmable logic controller PLC.
[0038] Optionally, the sensor 6 is an ultrasonic sensor.
[0039] Optionally, the sensor 6 is disposed opposite to the end face of the adhesive film roll, and the sensor 6 is an image sensor. The image sensor takes a photo of the end face of the adhesive film roll, and the total controller 5 maps the area value to the remaining amount of the adhesive film roll by calculating the end face area of the adhesive film roll.
[0040] Optionally, the power device 7 includes a cylinder. When the staff presses a specific button (not shown), the specific button sends an instruction to the total controller 5 to move the heating sheet 3 upward (or downward). The total controller 5 then sends an instruction to the solenoid valve of the cylinder to open or close, and the movable part of the cylinder moves up and down. The movable part of the cylinder is fixedly connected to the upper heating sheet 3, thereby driving the upper heating sheet 3 to move up and down. Specifically, two cylinders can be provided, respectively located at both ends of the upper heating sheet 3.
[0041] Optionally, the power device 7 includes a stepper motor. The total controller 5 sends a control signal to the stepper motor to control the output shaft of the stepper motor to rotate forward and backward. The output shaft of the stepper motor drives a lead screw (not shown) to move up and down. The lead screw is fixedly connected to the upper heating sheet 3, thereby driving the upper heating sheet 3 to move up and down. The rotational motion of the output shaft can be converted into the linear motion of the lead screw through gears, sliders, cranks, or electromagnetic linear drivers. This part belongs to the common knowledge in the art and will not be described in detail.
[0042] Based on the same inventive concept, the present utility model further provides a cutting machine, which includes the above-mentioned automatic heating control device for the cutting machine. The structural details of how the cutting machine cuts the adhesive film and how it pulls the adhesive film to move can be designed according to the prior art, and the present utility model does not limit this.
[0043] Each embodiment in the present utility model is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.
[0044] The protection scope of the present utility model is not limited to the above embodiments. Obviously, those skilled in the art can make various changes and deformations to the present utility model without departing from the scope and spirit of the present utility model. If these changes and deformations fall within the scope of the claims of the present utility model and their equivalent technologies, the intention of the present utility model also includes these changes and deformations.
Claims
1. An automatic heating control device for a cutting machine, characterized in that: It includes a sensor, a master controller, an upper heating component, a lower heating component, a power device and a switch component; The master controller is respectively connected to the power device, the sensor and the switch assembly, the sensor is used to detect the amount of remaining film on the film roll of the cutting machine, and the switch assembly is used to control whether the upper heating assembly and the lower heating assembly start heating; The upper heating assembly includes an upper heating plate, and the lower heating assembly includes a lower heating plate. The upper heating plate is arranged opposite to the lower heating plate, and the upper heating plate is located above the lower heating plate. The power device is used to drive the upper heating plate to move up and down.
2. The automatic heating control device for a cutting machine according to claim 1, characterized in that: The switch assembly includes an intermediate relay, which includes an intermediate relay coil, a first contact and a second contact. The first end of the intermediate relay coil is connected to an IO port of the main controller, and the second end of the intermediate relay coil is connected to a DC power line or a DC ground line. The first contact is used to control the on and off between the live wire and the upper heating assembly, and the second contact is used to control the on and off between the live wire and the lower heating assembly.
3. The automatic heating control device for a cutting machine according to claim 2, characterized in that: The upper heating component also includes an upper heating controller, which includes a first live wire electrode and a first neutral wire electrode, and the first contact is connected between the live wire and the first live wire electrode; the lower heating component also includes a lower heating controller, which includes a second live wire electrode and a second neutral wire electrode, and the second contact is connected between the live wire and the second live wire electrode; the upper heating controller is connected to the upper heating plate, and the lower heating controller is connected to the lower heating plate, and the first neutral wire electrode and the second neutral wire electrode are both connected to the neutral wire.
4. The automatic heating control device for a cutting machine according to claim 3, characterized in that: It also includes a first manual switch and a second manual switch, wherein the first manual switch and the first contact are connected in series between the first live wire electrode and the live wire, and the second manual switch and the second contact are connected in series between the second live wire electrode and the live wire.
5. The automatic heating control device for a cutting machine according to claim 1, characterized in that: The sensor is arranged opposite to the outer peripheral surface of the film roll, the sensor is fixedly arranged relative to the axis of the film roll, and the sensor is a distance sensor.
6. The automatic heating control device for a cutting machine according to claim 5, characterized in that: The sensor is an ultrasonic sensor.
7. The automatic heating control device for a cutting machine according to claim 1, characterized in that: The sensor is arranged opposite to the end surface of the film roll, and the sensor is an image sensor.
8. The automatic heating control device for a cutting machine according to claim 1, characterized in that: The power device includes a cylinder.
9. The automatic heating control device for a cutting machine according to claim 1, characterized in that: The power device comprises a stepping motor.
10. A cutting machine, characterized in that: The invention comprises the automatic heating control device for a cutting machine as claimed in any one of claims 1 to 9.