Multi-pass double-sided uniform thickness coating device

Abstract

The utility model relates to a multi-pass double-sided uniform-thickness coating device which is characterized in that an unwinding roller releases base cloth and sends the base cloth to the upper end of a lower micro-concave roller, the lower micro-concave roller is arranged in a blanking groove, the highest point of the lower micro-concave roller is higher than the unwinding roller, and a lower preheating tuyere positioned below the base cloth is arranged between the lower micro-concave roller and the unwinding roller; the lower micro-concave roller conveys base cloth to the reversing roller arranged above the base cloth, the reversing roller conveys the base cloth to the upper end of the upper micro-concave roller, the upper micro-concave roller is arranged in the feeding groove, the highest point of the upper micro-concave roller is higher than the reversing roller, the upper micro-concave roller conveys the base cloth to the drying oven, and the drying oven conveys the base cloth to the winding roller. An upper preheating pipe located above the base cloth is arranged between the upper micro-concave roller and the drying oven, and the temperature of the upper preheating pipe is lower than the air supply temperature of the lower preheating air opening; the two ends of the reversing roller are lifted and supported through fine adjustment air cylinders. The device is simple in structure, high in coating efficiency and stable in quality, and double-side coating is formed at a time.

Description

Technical Field

[0001] This utility model relates to a coating device, specifically a multi-pass double-sided uniform thickness coating device. Background Art

[0002] In the current double-sided adhesive coating production, the conventional method is to coat one side with a concave roller and then send it to an oven for drying, and then send it to another concave roller to coat the other side and then send it to an oven for drying. The second drying process affects the coating on the first dried side, which can easily lead to inconsistent double-sided coating performance and affect the overall forming thickness and quality. Summary of the Invention

[0003] This invention provides a multi-pass double-sided uniform thickness coating device with simple structure, one-time double-sided coating, high coating efficiency, and stable quality.

[0004] The technical solution adopted by this utility model is: a multi-pass double-sided uniform thickness coating device, including an unwinding roller, characterized in that: the unwinding roller releases the base fabric to the upper end of a lower micro-concave roller, the lower micro-concave roller is set in a feeding trough, the highest point of the lower micro-concave roller is higher than the unwinding roller, and a lower preheating air inlet is set between the lower micro-concave roller and the unwinding roller, located below the base fabric; the lower micro-concave roller sends the base fabric to a reversing roller set above the base fabric, the reversing roller sends the base fabric to the upper end of an upper micro-concave roller, the upper micro-concave roller is set in a feeding trough, the highest point of the upper micro-concave roller is higher than the reversing roller, the upper micro-concave roller sends the base fabric to an oven, the oven sends the base fabric to a take-up roller, and an upper preheating air inlet is set between the upper micro-concave roller and the oven, located above the base fabric, the hot air temperature delivered from the upper preheating air inlet is lower than that from the lower preheating air inlet; the two ends of the reversing roller are supported by a fine-tuning cylinder for lifting.

[0005] The upper and lower preheating air inlets are connected to the upper and lower preheating boxes via upper and lower preheating pipelines, respectively. Precision filters are installed on the upper and lower preheating pipelines, and electric heating, air supply fans, and primary filters are installed inside the upper and lower preheating boxes.

[0006] A multi-pass double-sided uniform thickness coating device includes an unwinding roller, which unwinds a base fabric to the upper end of a lower concave roller. The lower concave roller is located in a feeding trough, and its highest point is higher than that of the unwinding roller. A lower preheating air inlet is located between the lower concave roller and the unwinding roller, below the base fabric. The lower concave roller feeds the base fabric to a reversing roller located above the base fabric. The reversing roller feeds the base fabric to the upper end of an upper concave roller, which is located in a feeding trough. Its highest point is higher than that of the reversing roller. The upper concave roller feeds the base fabric to an oven. The oven feeds the base fabric to a take-up roller. An upper preheating pipe is located between the upper concave roller and the oven, above the base fabric. The temperature of the upper preheating pipe is lower than the air temperature supplied by the lower preheating air inlet. The two ends of the reversing roller are supported by a fine-tuning cylinder for lifting.

[0007] The lower preheating air outlet is connected to the lower preheating box via the lower preheating pipeline. A precision filter is installed on the lower preheating pipeline, and an electric heater, a blower, and a primary filter are installed inside the lower preheating box.

[0008] A lower CCD vision probe is installed on the side of the base fabric between the unwinding roller and the micro-concave roller, and an upper CCD vision probe is installed on the side of the base fabric between the reversing roller and the micro-concave roller. The upper and lower CCD vision probes are jointly controlled by a PLC-controlled fine-tuning cylinder.

[0009] This invention employs lower and upper micro-concave rollers to sequentially coat the lower and upper surfaces of the base fabric, completing the coating process in one pass before sending it to the oven for final setting. The workflow is simple and the coating and forming efficiency is high. Before the lower adhesive layer is applied to the base fabric via the lower micro-concave roller, it is first preheated through the lower preheating vent. This preheating accelerates the forming process during the application of the lower adhesive layer. Then, after the base fabric is fed onto the upper micro-concave roller for the upper adhesive layer, it is preheated through the upper preheating pipe at a temperature lower than that of the lower preheating vent. This helps ensure that the upper and lower adhesive layers are at the same degree of curing before entering the oven, ultimately ensuring consistent and stable formation of the double-sided adhesive on the base fabric. As the unwinding roller releases the base fabric, the angle between the base fabric and the upper concave roller gradually decreases. At this time, the winding roller is driven to descend by the fine-tuning cylinder, and the angle between the base fabric and the upper concave roller is adjusted in real time to meet the control requirements of uniform coating thickness of the upper and lower adhesive layers. The lower preheating air outlet filters and heats the air to prevent contamination of the base fabric, and at the same time blows away dust, particles and other contaminants on the base fabric, which helps to improve the coating quality of the base fabric. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram: 1. Unwinding roller; 2. Base fabric; 3. Lower preheating air vent; 4. Lower preheating pipe; 5. Precision filter; 6. Lower preheating box; 7. Electric heater; 8. Air blower; 9. Primary filter; 10. Lower micro-concave roller; 11. Feed trough; 12. Reversing roller; 13. Upper micro-concave roller; 14. Feed trough; 15. Upper preheating pipe; 16. Drying oven; 17. Rewinding roller; 18. Fine-tuning cylinder; 19. Lower CCD vision probe; 20. Upper CCD vision probe. DETAILED DESCRIPTION

[0012] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0013] Figure 1As shown, a multi-pass double-sided uniform thickness coating device includes an unwinding roller 1, a lower preheating air inlet 3, a lower preheating pipe 4, a precision filter 5, a lower preheating box 6, an electric heater 7, a blower 8, a primary filter 9, a lower micro-concave roller 10, a feeding trough 11, a reversing roller 12, an upper micro-concave roller 13, a feeding trough 14, an upper preheating pipe 15, an oven 16, and a take-up roller 17. The unwinding roller 1 releases the base fabric 2 to the upper end of the lower micro-concave roller 10. The lower micro-concave roller 10 is located in the feeding trough 11, and its highest point is higher than that of the unwinding roller 1. A lower preheating air inlet 3 is located below the base fabric between the lower micro-concave roller 10 and the unwinding roller 1. The lower preheating air inlet 3 is connected to the lower preheating box 6 via the lower preheating pipe 4. A precision filter 5 is installed on the lower preheating pipe 4. Inside the lower preheating box 6, an electric heater 7, a blower 8, and a primary filter 9 are installed sequentially. External air enters through the primary filter 9. After primary filtration by the efficiency filter 9, the fabric is heated by the blower 8 and then by the electric heater 7. After further filtration by the precision filter 5, the fabric is sent to the preheating air outlet 13 to preheat the base fabric. The lower micro-concave roller 10 feeds the base fabric 2 to the reversing roller 12 located above the base fabric. The two ends of the reversing roller 12 are supported by the fine-tuning cylinder 18. The reversing roller 12 feeds the base fabric to the upper micro-concave roller 13, which is located in the feeding trough 14. The highest point of the upper micro-concave roller 13 is higher than the highest point of the reversing roller 12. The upper micro-concave roller 13 feeds the base fabric 2 to the drying oven 16. The drying oven 16 feeds the base fabric to the take-up roller 17. An upper preheating pipe 15 is located above the base fabric between the upper micro-concave roller and the drying oven. The temperature of the upper preheating pipe 15 is lower than the air temperature supplied by the lower preheating air outlet 3.

[0014] In this embodiment, the fine adjustment of the lowering cylinder 18 can be achieved by using the lower CCD vision probe 19 corresponding to the base fabric side between the unwinding roller 1 and the micro-concave roller 10, combined with the upper CCD vision probe 20 corresponding to the base fabric side between the reversing roller 12 and the micro-concave roller 13, and jointly controlled by the PLC.

[0015] Based on this, calculations can be performed according to the initial included angle of the micro-concave rollers for feeding the base fabric, the thickness of the base fabric, the diameter of each roller, and the base fabric feeding speed, and controlled by the PLC controller.

Claims

1. A multi-pass double-sided uniform thickness coating apparatus, comprising an unwinding roller, characterized in that: The unwinding roller releases the base fabric to the upper end of the lower micro-concave roller, which is located in the feeding trough. The highest point of the lower micro-concave roller is higher than that of the unwinding roller. A lower preheating air vent is located below the base fabric between the lower micro-concave roller and the unwinding roller. The lower micro-concave roller delivers the base fabric to a reversing roller located above the base fabric. The reversing roller delivers the base fabric to the upper end of the upper micro-concave roller, which is located in the feeding trough. The highest point of the upper micro-concave roller is higher than that of the reversing roller. The upper micro-concave roller delivers the base fabric to the drying oven. The drying oven delivers the base fabric to the take-up roller. An upper preheating air vent is located above the base fabric between the upper micro-concave roller and the drying oven. The hot air delivered from the upper preheating air vent has a lower temperature than that from the lower preheating air vent. The two ends of the reversing roller are supported by a fine-tuning cylinder for lifting and lowering.

2. The multi-pass double-sided uniform thickness coating apparatus according to claim 1, characterized in that: The upper and lower preheating air inlets are connected to the upper and lower preheating boxes via upper and lower preheating pipelines, respectively. Precision filters are installed on the upper and lower preheating pipelines, and electric heating, air supply fans, and primary filters are installed inside the upper and lower preheating boxes.

3. The multi-pass double-sided uniform thickness coating apparatus according to claim 1, characterized in that: A lower CCD vision probe is installed on the side of the base fabric between the unwinding roller and the micro-concave roller, and an upper CCD vision probe is installed on the side of the base fabric between the reversing roller and the micro-concave roller. The upper and lower CCD vision probes are jointly controlled by a PLC-controlled fine-tuning cylinder.

4. A multi-pass double-sided uniform thickness coating apparatus, comprising an unwinding roller, characterized in that: The unwinding roller releases the base fabric to the upper end of the lower micro-concave roller, which is located in the feeding trough. The highest point of the lower micro-concave roller is higher than that of the unwinding roller. A lower preheating air vent is located below the base fabric between the lower micro-concave roller and the unwinding roller. The lower micro-concave roller delivers the base fabric to a reversing roller located above the base fabric. The reversing roller delivers the base fabric to the upper end of the upper micro-concave roller, which is located in the feeding trough. The highest point of the upper micro-concave roller is higher than that of the reversing roller. The upper micro-concave roller delivers the base fabric to the drying oven. The drying oven delivers the base fabric to the take-up roller. An upper preheating pipe is located above the base fabric between the upper micro-concave roller and the drying oven. The temperature of the upper preheating pipe is lower than the air temperature delivered by the lower preheating air vent. The two ends of the reversing roller are supported by a fine-tuning cylinder for lifting.

5. The multi-pass double-sided uniform thickness coating apparatus according to claim 4, characterized in that: The lower preheating air outlet is connected to the lower preheating box via the lower preheating pipeline. A precision filter is installed on the lower preheating pipeline, and an electric heater, a blower, and a primary filter are installed inside the lower preheating box.

6. The multi-pass double-sided uniform thickness coating apparatus according to claim 4, characterized in that: A lower CCD vision probe is installed on the side of the base fabric between the unwinding roller and the micro-concave roller, and an upper CCD vision probe is installed on the side of the base fabric between the reversing roller and the micro-concave roller. The upper and lower CCD vision probes are jointly controlled by a PLC-controlled fine-tuning cylinder.

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