Double-sided coating device for producing plastic-substitute paper

Abstract

The utility model provides a double-sided coating device for producing plastic-substitute paper, comprising a coating station, an unwinding roller, a winding roller, a supporting conveying roller, a coating unit and a drying unit. An upper brush head and a lower brush head are arranged in the coating unit. The upper brush head and the inner wall of the coating unit are fixed in position by an upper brush head bracket. The height distance between the upper brush head and the lower brush head is controlled by a height adjuster. In the drying unit, an insulating layer is arranged on the outer side of the drying unit to be thermally insulated from the coating unit. The plastic-substitute paper is conveyed to the supporting conveying roller through the unwinding roller on the left side of the coating station, enters into the coating unit and the drying unit, and then enters into the supporting conveying roller on the right side of the drying unit. Finally, the plastic-substitute paper is collected by the winding roller. The utility model improves the production rate of the plastic-substitute paper and reduces the production cost at the same time.

Description

Technical Field

[0001] The utility model relates to a coating unit, in particular to a double-sided coating device for producing plastic-substitute paper. Background Art

[0002] In today's daily life and development, because environmental issues have received more attention from people, the use of plastic products has been restricted. Therefore, paper will be used instead of plastic bags when packaging. Plastic-free paper was born under such conditions, which has also led to an increasing demand for plastic-free paper. Therefore, it is inevitable to optimize the production process of plastic-free paper. In the traditional production process, the coating process of producing plastic-free paper is to coat one side first and then the other side. After the coating is completed, the coating is dried in the next equipment, which greatly reduces the production efficiency and the cost of the equipment will also increase, resulting in higher production costs and longer production cycles.

[0003] Based on the above situation, in the prior art, a patent with publication number CN102632017A provides a double-sided coating device, including a first coating head, a second coating head, a first roller and a second roller; the first coating head is arranged on one side of the above-mentioned substrate, so that the above-mentioned coating liquid is coated with the above-mentioned coating liquid alternately forming a coating area and a non-coating area in a direction intersecting with the above-mentioned feeding direction; the second coating head is arranged on the other side of the above-mentioned substrate, so that the above-mentioned coating liquid is coated with the above-mentioned coating liquid alternately forming a coating area and a non-coating area in a direction intersecting with the above-mentioned feeding direction; and a coating roller, which is arranged on one side of the above-mentioned substrate and near a position opposite to the above-mentioned second coating head across the above-mentioned substrate, and the above-mentioned coating roller has: a first roller, which is arranged at both end portions along the axial direction; a second roller, and a rotating mechanism that rotates the first and second rollers and makes the circumferential speed of the first roller greater than the circumferential speed of the second roller. According to the above structure, the left-right jumping of the substrate can be suppressed, and good double-sided simultaneous coating can be performed.

[0004] However, the equipment still has some shortcomings in actual use. One obvious point is that the alternating coating area between the first coating head and the second coating head cannot control the thickness of the coating layer. Therefore, there is a lack of a device for adjusting the thickness of the coating layer. When the coating area is alternately formed, the material is coated. Due to the action of gravity, the paint will drip to the bottom of the device, causing waste of paint. At the same time, there is a lack of a paint recovery tank. After the coating is completed, the coating drying process cannot be completed, so the coated material cannot be collected in time, which will cause the material to be contaminated. Therefore, there is a lack of a drying unit to dry the material that has completed the coating process in time. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes a double-sided coating device for producing plastic-free paper, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] A double-sided coating device for producing plastic-substitute paper comprises a coating station, a rectangular box body is arranged in the middle of the coating station, and the box body is arranged as a coating unit and a drying unit from left to right in sequence, an upper brush head and a lower brush head are arranged in the coating unit, a coating recovery tank is fixedly installed below the lower brush head, an upper brush head bracket fixedly connected to the box body is arranged on the left side of the upper brush head, a height adjustment unit is arranged on the right side of the upper brush head and the lower brush head, an insulating layer is arranged in the shell interlayer of the drying unit, fans are installed at the four corners of the drying unit, and air guide covers are installed at the four corners of the drying unit, the air guide covers are in an arc shape and have a plurality of small holes on the surface surrounding the outside of the fan, heating plates are arranged just above and just below the inside of the drying unit, and an exhaust vent is arranged above the right outer shell of the drying unit.

[0007] Furthermore, a unwinding roller is arranged at the left end of the coating platform, a winding roller is arranged at a position symmetrical to the unwinding roller on the coating platform, and a plurality of supporting conveying rollers connected to the coating platform are arranged in the conveying direction of the unwinding roller.

[0008] Furthermore, the upper brush head is 2-4 cm longer than the lower brush head.

[0009] Furthermore, the height adjustment unit includes a motor, a screw, a threaded sleeve, and a connecting arm. The motor is installed in a box, the screw is connected to the motor, the threaded sleeve is movably sleeved on the outside of the screw, and the two ends of the connecting arm are respectively connected to the threaded sleeve and the upper brush head.

[0010] Furthermore, the inner cavity of the coating unit is provided with a feed pump, the liquid inlet end of the feed pump is provided with a liquid inlet pipe, the liquid outlet end of the feed pump is provided with a liquid outlet pipe, the feed pump is connected with the upper brush head and the lower brush head respectively through the liquid outlet pipe, and the storage box is connected to the top of the box body, and the storage box is connected with the liquid inlet end of the feed pump through the liquid inlet pipe.

[0011] Furthermore, a hole is opened inside the shell of the drying unit and is engaged with the air deflector, and a gap between the air deflector and the fan is 3-5 cm.

[0012] Furthermore, an exhaust vent is opened above the right shell of the drying unit.

[0013] Furthermore, the paint recovery groove is arranged below the lower brush head and connected to the box body, and the length of one end of the paint recovery groove is flush with the front part of the upper brush head of the coating unit.

[0014] The utility model has the beneficial effect that the distance between the upper brush head and the lower brush head can be adjusted by the height adjustment unit, so as to realize the control of the coating thickness. When using the double-sided coating device for producing plastic-substitute paper, the production cycle can be greatly shortened, and the production cost can be effectively reduced. The operation process will also be simpler, and only the coating thickness and the drying temperature need to be controlled. The device for controlling the coating thickness and the drying temperature is also simpler and easier to use. The utility model can coat the upper and lower surfaces of the plastic-substitute paper at the same time during the coating process, and the drying process will be started directly after the coating is completed. The coating process and the drying process are combined, which also reduces the floor space occupied by the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the structure of a double-sided coating device for producing plastic-free paper in an example of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the coating unit in the double-sided coating device for producing plastic-free paper in the example of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the drying unit in the double-sided coating device for producing plastic-free paper in an example of the utility model.

[0018] Figure numerals: paint table 1, unwinding roller 2, winding roller 3, supporting conveying roller 4, coating unit 5, feed pump 51, liquid inlet pipe 511, liquid outlet pipe 512, upper brush head bracket 52, storage box 53, height adjustment unit 54, motor 541, screw rod 542, threaded sleeve 543, connecting arm 544, upper brush head 55, lower brush head 56, drying unit 6, exhaust vent 61, fan 62, guide cover 63, heating plate 64, insulation layer 65, box body 7, paint recovery tank 8. DETAILED DESCRIPTION

[0019] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0020] like Figures 1 to 3As shown, the utility model provides a technical solution: a double-sided coating device for producing plastic-substitute paper, comprising a coating station 1, a rectangular box 7 is arranged in the middle of the coating station 1, and the box 7 is arranged as a coating unit 5 and a drying unit 6 from left to right, an upper brush head 55 and a lower brush head 56 are arranged in the coating unit 5, and a coating recovery tank 8 is fixedly installed below the lower brush head 56, an upper brush head bracket 52 fixedly connected to the box 7 is arranged on the left side of the upper brush head 55, and a height adjustment unit 54 is arranged on the right side of the upper brush head 55 and the lower brush head 56, an insulating layer 65 is arranged in the shell interlayer of the drying unit 6, fans 62 are installed at the four corners of the drying unit 6, and air guide covers 63 are installed at the four corners of the drying unit 6, the air guide covers 63 are arc-shaped and have a plurality of small holes on the surface surrounding the outside of the fan 62, a heating plate 64 is arranged just above and just below the inside of the drying unit 6, and an exhaust vent 61 is arranged above the right outer shell of the drying unit 6.

[0021] A reel 2 is disposed at the left end of the coating platform 1 , a reel 3 is disposed symmetrically to the reel 2 on the coating platform 1 , and a plurality of supporting conveying rollers 4 connected to the coating platform 1 are disposed in the conveying direction of the reel 2 .

[0022] The utility model places support conveying rollers 4 on the left and right sides of the box body 7 respectively. The support conveying rollers 4 can fix the plastic-substitute paper in the box body 7 very well, and can provide sufficient power for the transmission of the plastic-substitute paper in the entire production line to enable it to run smoothly in the production line. The support conveying rollers 4 between the box body 7 and the unwinding roller 2 mainly provide power for the plastic-substitute paper released from the unwinding roller 2 to move it to the coating unit 5 and enter the box body 7 so that its position can be better fixed and its state in the box body 7 can be stabilized. The support conveying rollers 4 between the box body 7 and the winding roller 3 mainly function to pull the plastic-substitute paper in the box body 7 to complete the coating and drying steps inside the box body 7, and assist the other support conveying roller 4 to fix the position of the plastic-substitute paper and stabilize the state of the plastic-substitute paper inside the box body 7, and finally transport the plastic-substitute paper that has completed the coating and drying process to the winding roller 3 for collection.

[0023] The utility model has an insulating layer 65 in the shell interlayer of the drying unit 6, and its main raw material is a vacuum insulation board. The coating unit 5 and the drying unit 6 can be effectively temperature-isolated inside the box to prevent the high temperature of the drying unit 6 from being transmitted into the coating unit 5 and causing the internal temperature of the coating unit 5 to rise. When the paint is just sprayed out or the paint is just sprayed and the uniform coating of the paint is not completed, it is dried.

[0024] like Figure 1 and Figure 2As shown, as one of the preferred embodiments of the utility model, the upper brush head 55 is 2-4 cm longer than the lower brush head 56; the paint recovery groove 8 is arranged below the lower brush head 56 and is connected to the box body 7, and the length of one end of the paint recovery groove 8 is flush with the front part of the upper brush head 55 of the coating unit 5.

[0025] The upper brush head 55 is 2-4 cm longer than the lower brush head 56. Its function is to coat the upper surface of the plastic-substitute paper first. If the raw material output by the upper brush head 55 is too much during coating, it will be brushed to the plastic-substitute paper behind by the brush head and will not be wasted. However, some raw materials will be sprayed out by the lower brush head 56. Since they are not dried, they will drip into the paint recovery tank 8 below the coating unit 5 due to gravity, and the dripped paint will be recovered for secondary utilization. The setting of the paint recovery tank 8 avoids waste of paint.

[0026] like Figure 2 As shown, as one of the preferred embodiments of the utility model, the height adjustment unit 54 includes a motor 541, a screw rod 542, a threaded sleeve 543, and a connecting arm 544. The motor 541 is installed in the box body 7, the screw rod 542 is connected to the motor 541, the threaded sleeve 543 is movably sleeved on the outside of the screw rod 542, and the two ends of the connecting arm 544 are respectively connected to the threaded sleeve 543 and the upper brush head 55.

[0027] The height adjustment unit 54 is used to adjust the distance between the upper brush head 55 and the lower brush head 56, so as to control the coating thickness. The screw rod 542 is a right-handed thread, and the threaded sleeve 543 is provided with an internal thread that cooperates with the screw rod 542. When the coating thickness is adjusted, the dynamic output shaft of the motor 541 is connected to the screw rod 542. When the motor 541 rotates clockwise, it drives the screw rod 542 to rotate clockwise in the same direction, and the threaded sleeve 543 moves downward, thereby driving the upper brush head 55 to move downward through the connecting arm 544, and slightly pressing down the plastic paper, so that the upper brush head 55 is close to the upper surface of the plastic paper, and the lower brush head is close to the lower surface of the plastic paper. The closer the upper brush head 55 and the lower brush head 56 are, the smaller the coating thickness of the plastic paper. Conversely, the farther the upper brush head 55 and the lower brush head 56 are, the greater the coating thickness of the plastic paper.

[0028] like Figure 2 As shown, as one of the preferred embodiments of the utility model, the inner cavity of the coating unit 5 is provided with a feed pump 51, the liquid inlet end of the feed pump 51 is provided with a liquid inlet pipe 511, the liquid outlet end of the feed pump 51 is provided with a liquid outlet pipe 512, the feed pump 51 is connected with the upper brush head 55 and the lower brush head 56 respectively through the liquid outlet pipe 512, the storage box 53 is connected to the top of the box body 7, and the storage box 53 is connected with the liquid inlet end of the feed pump 51 through the liquid inlet pipe 511.

[0029] The material in the storage box 53 is transported to the upper brush head 55 and the lower brush head 56 respectively through the liquid inlet pipe 511, the feed pump 51 and the liquid outlet pipe 512. The liquid outlet pipe 512 connected to the upper brush head 55 is a retractable hose and is fixed on the upper brush head bracket 52. The liquid outlet pipe 512 connected to the upper brush head 55 is a copper pipe or steel pipe with relatively high hardness, thereby forming support for the lower brush head 56.

[0030] like Figure 1 and Figure 3 As shown in FIG. 1 , as one of the preferred embodiments of the present invention, the inner opening of the housing of the drying unit 6 is engaged with the air guide 63, and the gap between the air guide 63 and the fan 62 is 3-5 cm. An exhaust vent 61 is provided at the upper opening of the right housing of the drying unit 6.

[0031] The fan 62 in the drying unit 6 is located inside the device. Since the quality of the plastic-free paper is relatively low, when the wind generated by the fan directly acts on the plastic-free paper, the state of the plastic-free paper will become extremely unstable and there will be a risk of being damaged by the wind. Therefore, a deflector 63 is arranged next to the fan 62 to disperse the wind generated by the fan 62 to various places inside the device. The inner opening of the shell of the drying unit 6 is engaged with the deflector 63. The deflector 62 is arc-shaped and has a number of small holes on the surface surrounding the outside of the fan to prevent the wind from directly acting on the plastic-free paper. The wind is diffused through the small holes on the surface and the sides of the deflector 63, so that the plastic-free paper is greatly protected in the drying unit. Since the gas in the drying unit 6 is dry and high-temperature gas, a large amount of moisture will be generated in the process of drying the plastic-free paper. If the moisture cannot be discharged in time, this will reduce the drying efficiency of the drying unit 6. Therefore, there is an exhaust vent 61 on the upper right side of the drying unit 6 to discharge the moisture generated inside out of the device.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A double-sided coating device for producing plastic-free paper, comprising a coating station (1), characterized in that: A rectangular box (7) is arranged in the middle of the paint table (1), and the box (7) is arranged to be a coating unit (5) and a drying unit (6) from left to right. An upper brush head (55) and a lower brush head (56) are arranged in the coating unit (5), and a paint recovery tank (8) is fixedly installed below the lower brush head (56). An upper brush head bracket (52) fixedly connected to the box (7) is arranged on the left side of the upper brush head (55), and a height adjustment device (54) is arranged on the right side of the upper brush head (55) and the lower brush head (56). An adjusting unit (54), a heat insulating layer (65) is arranged in the shell interlayer of the drying unit (6), fans (62) are installed at the four corners of the drying unit (6), air guide covers (63) are installed at the four corners of the drying unit (6), the air guide covers (63) are in an arc shape and have a plurality of small holes on the surface surrounding the outside of the fan (62), heating plates (64) are arranged directly above and directly below the inside of the drying unit (6), and an exhaust vent (61) is arranged above the right outer shell of the drying unit (6).

2. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: An unwinding roller (2) is arranged at the left end of the coating platform (1), a rewinding roller (3) is arranged at a position symmetrical to the unwinding roller (2) on the coating platform (1), and a plurality of supporting conveying rollers (4) connected to the coating platform (1) are arranged in the conveying direction of the unwinding roller (2).

3. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: The upper brush head (55) is 2-4 cm longer than the lower brush head (56).

4. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: The height adjustment unit (54) comprises a motor (541), a screw rod (542), a threaded sleeve (543), and a connecting arm (544); the motor (541) is installed in a box (7); the screw rod (542) is connected to the motor (541); the threaded sleeve (543) is movably sleeved on the outside of the screw rod (542); and the two ends of the connecting arm (544) are respectively connected to the threaded sleeve (543) and the upper brush head (55).

5. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: The inner cavity of the coating unit (5) is provided with a feed pump (51); a liquid inlet end of the feed pump (51) is provided with a liquid inlet pipe (511); a liquid outlet end of the feed pump (51) is provided with a liquid outlet pipe (512); the feed pump (51) is connected to the upper brush head (55) and the lower brush head (56) respectively via the liquid outlet pipe (512); a material storage box (53) is connected to the top of the box body (7); the material storage box (53) is connected to the liquid inlet end of the feed pump (51) via the liquid inlet pipe (511).

6. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: The inner opening of the shell of the drying unit (6) is engaged with the air guide cover (63), and the gap between the air guide cover (63) and the fan (62) is 3-5 cm.

7. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: An exhaust vent (61) is provided in the opening above the right shell of the drying unit (6).

8. The double-sided coating device for producing plastic-free paper according to claim 1, characterized in that: The paint recovery groove (8) is arranged below the lower brush head (56) and is connected to the box body (7); one end of the paint recovery groove (8) is flush with the front of the upper brush head (55) of the coating unit (5).

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