Powder coating device for double-sided spraying of coiled material

Abstract

The utility model discloses a powder coating device for double-sided spraying of a coiled material, which belongs to the technical field of coiled material spraying equipment and is characterized in that a transfer roller, a front electrostatic spraying device, a conveying roller, a back electrostatic spraying device, a sag meter and a coiled material curing device are sequentially arranged along the conveying direction of the coiled material; the coiled material cooling device comprises a water cooling roller, a tension machine and a deviation rectifying roller. Through alternate arrangement of the coiled material electrostatic spraying devices and directional conveying arrangement of the coiled material, the coiled material can be subjected to front and back electrostatic spraying at the same time, one-time curing is carried out after alternate spraying, the coiled material is conveyed and sprayed in a one-way mode in the spraying process and does not need to be folded back for spraying, the double-face and double-color spraying requirement of the coiled material is met, production waste is reduced, and the production cost is reduced. The production efficiency is improved, and the total investment and the energy consumption of the double-sided powder spraying coating device for the coiled material are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of coiled material spraying, especially relates to a powder coating device for double-sided spraying of coiled material. BACKGROUND

[0002] Coiled material spraying is to take metal coiled material (cold-rolled plate, hot-dip galvanized plate, aluminum plated plate, high-aluminum alloy plate, stainless steel plate, etc.) as base material, uniformly spray paint on the single side or double side of the flat plate strip after uncoiling on the continuous coating production line running at high speed, and then carry out rapid baking and curing, and then go through the process of cooling and winding, etc. to complete the coiled material spraying coating. The electrostatic powder spraying process is more and more applied to the continuous production of metal coiled material. The powder coating has the advantages of environmental protection, high efficiency, energy saving, high quality, etc. and has been a coating method actively promoted. Various industries are actively promoting the work of "oil to powder". For decades, the research and development of using powder paint for coiled material coating has been carried out. At present, the oil to powder of coiled material coating is still mostly liquid paint coating except for a few slow lines using powder spraying process. In the prior art, most of the coiled material production lines basically add powder coating equipment on the original liquid coating line to meet the demand of single-sided powder spraying, but for double-sided powder spraying of coiled material, it is necessary to fold back after one side is sprayed, dried and cooled to spray, dry and cure the other side, that is, "two spraying and two drying". The powder spraying and curing device needs to go in and out twice, which greatly reduces the production efficiency. At the same time, if different colored powder paints are sprayed on both sides, the powder paint needs to be replaced, which causes color mixing problems. In addition, the folding back process of coiled material for double-sided spraying also easily causes wear of the sprayed surface, which easily causes unqualified products.

[0003] Based on the problems and defects of double-sided spraying of coiled material, the utility model carries out research and development on the powder coating equipment for double-sided spraying of coiled material. On the basis of realizing the replacement of oil paint coating by powder coating of coiled material, one-way conveying coating line for double-sided spraying of coiled material is realized, which avoids the need for folding back spraying, avoids the two-in and two-out of the curing device, realizes "two spraying and one drying", improves the production efficiency of double-sided spraying of coiled material, avoids the wear of the sprayed surface during conveying, and avoids the color mixing problem caused by replacing powder paint. Double-sided spraying is simultaneously cured, the double-sided sprayed coating is uniformly cured, and the effect of double-sided spraying of coiled material is improved. SUMMARY

[0004] In order to solve the above problems, the utility model discloses a powder coating device for double-sided spraying of coiled material, which is sequentially provided with a transfer roller, a front electrostatic spraying device, a conveying roller, a back electrostatic spraying device, a sag meter, a coiled material curing device, a coiled material cooling device, a water-cooled roller, a tension machine and a deviation correcting roller along the coiled material conveying direction.

[0005] The positive and negative electrostatic spraying devices spray alternately on the positive and negative surfaces of the roll material, the transfer roller is arranged directly above the positive electrostatic spraying device, the positive surface of the roll material faces upward from the direction of the roll material conveying, and the positive surface is ensured to be sprayed when the roll material is conveyed to the positive electrostatic spraying device; the conveying roller is arranged obliquely below the positive electrostatic spraying device, the positive surface of the roll material faces downward along the horizontal conveying direction of the roll material, and the negative surface is ensured to be sprayed when the roll material is conveyed to the negative electrostatic spraying device.

[0006] The roll material curing device is provided with a roll material curing channel, infrared radiation heating plates are arranged above and below the roll material curing channel, and the positive and negative surfaces of the roll material are cured respectively, a gradienter is arranged between the negative electrostatic spraying device and the roll material curing device, the gradient of the roll material in the negative electrostatic spraying device and the roll material curing channel is monitored, the monitored gradient data is fed back to the tensioner, the tensioner adjusts the gradient of the roll material by using tension, the roll material is kept horizontal when being sprayed in the negative electrostatic spraying device, the roll material is kept in the best curing position of the roll material curing channel when being cured, and the positive and negative surfaces of the roll material are uniformly sprayed and completely cured.

[0007] The roll material cooling device is provided with an air cooling device and a water cooling roller, the air cooling device is arranged after the roll material curing device, the water cooling roller is arranged at the outlet of the air cooling device of the roll material, and the temperature of the double surfaces of the roll material is further cooled, and the water cooling roller is provided with a tensioner and a deviation correcting roller, the conveying line speed of the roll material is adjusted, and the roll material is prevented from deviating during conveying.

[0008] The powder coating device for double-surface spraying of the roll material, wherein the positive electrostatic spraying device comprises a positive spraying device and a positive spraying room, the negative electrostatic spraying device comprises a negative spraying device and a negative spraying room, the positive spraying room is arranged vertically, the roll material input ports of the positive spraying room are arranged at the top and the bottom respectively, the positive spraying device is arranged on the side opposite to the positive spraying room, and is arranged to spray horizontally and reciprocally to the left and right of the positive surface of the roll material, the roll material input port and the output port of the negative spraying room are arranged on the front side and the rear side respectively, and the negative spraying device is arranged on the top of the negative spraying room and is arranged to spray vertically and reciprocally to the front and rear of the negative surface of the roll material.

[0009] The powder coating device for double-surface spraying of the roll material, wherein the roll material curing device channel is provided with infrared radiation heating plates, the roll material curing device channel is provided with infrared radiation heating plates symmetrically above and below, and the distance between the roll material and the infrared radiation heating plates above and below is greater than or equal to 20 mm.

[0010] The powder coating device for double-surface spraying of the roll material, wherein the air cooling device is provided with air outlets symmetrically above and below, different control valves are arranged at the air outlets above and below, the positive surface or the negative surface of the roll material can be cooled by air blowing, or the positive surface and the negative surface of the roll material can be cooled by air blowing simultaneously.

[0011] As described above, in the powder coating apparatus for double-sided spraying of roll material, the water-cooled roller includes a water-cooled roller one and a water-cooled roller two, which are arranged symmetrically above and below each other to cool and reduce the temperature of the coating on the front and back sides of the roll material, respectively.

[0012] The powder coating apparatus for double-sided spraying of roll material as described above, wherein the correction roller is a dual-roller correction configuration, including a first correction roller, a second correction roller, a base, a power mechanism, and a limiting mechanism.

[0013] As described above, the powder coating device for double-sided spraying of roll materials is arranged in an upper layer and a ground layer, which are set according to the direction of the roll material. The upper layer is equipped with a transfer roller for transporting the roll material. The back side of the roll material contacts the transfer roller and is transported to the front electrostatic spraying device. The front electrostatic spraying device is vertically set on the ground layer. The roll material enters the front spraying chamber from the top inlet. After the front side of the roll material is sprayed, it is output from the bottom outlet of the front spraying chamber. The bottom outlet of the front spraying chamber is equipped with two conveying rollers. After the front side of the roll material is sprayed, the back side of the roll material contacts the conveying roller and is horizontally transported to the back electrostatic spraying device. The back electrostatic spraying device is horizontally set on the ground layer. The front side of the roll material enters the back spraying chamber from the left inlet. At this time, the back sprayer sprays forward and backward along the width direction of the roll material. After the back side of the roll material is sprayed, it is horizontally transported to the right outlet of the back spraying chamber. Along the horizontal transport direction of the roll material, a sag meter, a roll material curing device, a roll material cooling device, a tension machine, and a correction roller are set on the ground layer.

[0014] As described above, in the powder coating apparatus for double-sided spraying of roll materials, the powder coating sprayed by the sprayer of the front electrostatic spraying device and the powder coating sprayed by the sprayer of the back electrostatic spraying device can be one or two types simultaneously.

[0015] The advantages of this utility model are:

[0016] By alternating the settings of the roll electrostatic spraying device and the directional conveying of the roll, the roll can be electrostatically sprayed on both the front and back sides simultaneously. After alternating spraying, it only needs to be cured once. The roll is conveyed and sprayed in one direction during the spraying process, without the need for folding back for re-spraying. This meets the requirements for double-sided and double-color spraying of the roll, avoids wear on the sprayed surface during the folding back spraying process, reduces production waste, improves production efficiency, and reduces the overall investment and energy consumption of the roll double-sided powder coating device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the powder coating device for double-sided spraying of roll material according to the present invention.

[0018] Figure 2 This is a schematic diagram of the corrective roller structure described in this utility model.

[0019] 1. transfer roller, 2. front electrostatic spraying device, 3. conveying roller, 4. back electrostatic spraying device, 5. sag meter, 6. coiled material curing device, 7. coiled material cooling device, 8. tension machine, 9. deviation correction roller.

[0020] 201. front sprayer, 202. front spray booth, 401. back sprayer, 402. back spray booth, 601. coiled material curing channel, 602. infrared radiation heating plate, 701. air cooling device, 702. water cooling roller, 901. first deviation correction roller, 902. second deviation correction roller, 903. base, 904. limiting mechanism, 905. power mechanism.

[0021] 7011. control valve, 7012. air cooling box, 7021. water cooling roller one, 7022. water cooling roller two. DETAILED DESCRIPTION

[0022] The coiled material double-sided spraying powder coating device is further described below in combination with the drawings.

[0023] It should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model creation and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model creation. In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present utility model creation, unless otherwise stated, the meaning of "multiple" is two or more.

[0024] To realize the production of the production line for double-sided color coating of pre-coated metal coiled material according to the present utility model creation, refer to Figures 1 to 2 .

[0025] As shown in Figure 1 , the transfer roller 1, the front electrostatic spraying device 2, the conveying roller 3, the back electrostatic spraying device 4, the sag meter 5, the coiled material curing device 6, the coiled material cooling device 7, the water cooling roller 702, the tension machine 8, and the deviation correction roller 9 are sequentially arranged along the coiled material conveying direction.

[0026] The roll material is sequentially passed through the front electrostatic spraying device 2 and the back electrostatic spraying device 4 during conveying, the front electrostatic spraying device 2 and the back electrostatic spraying device 4 are used for alternately spraying the front and back of the roll material respectively, the two surfaces of the roll material do not affect each other during spraying, the transfer roller 1 is arranged directly above the front electrostatic spraying device 2, the front of the roll material faces upward from the conveying direction of the roll material, so that the back of the roll material can be supported and conveyed, the deformation of the roll material during conveying is prevented, the front of the roll material faces the direction of the front sprayer 201 when the roll material is conveyed to the front electrostatic spraying device 2, the conveying roller 1 is arranged obliquely below the front electrostatic spraying device 2, so that the roll material is transferred from the oblique direction to the horizontal direction, the front of the roll material faces downward along the horizontal conveying direction of the roll material, the back of the roll material is in contact with the conveying roller 3 and is horizontally supported and conveyed, the bending of the roll material under the action of gravity is prevented, the sprayed front of the roll material is prevented from being bumped and scratched during conveying, the spraying effect of the front is affected, the back of the roll material is sprayed when the roll material is conveyed to the back electrostatic spraying device 4, the back of the roll material faces upward along the horizontal conveying direction, and the back sprayer 401 of the back electrostatic spraying device 4 is vertically sprayed to the roll material.

[0027] Further, the roll material curing device 6 is provided with a roll material curing channel 601, the roll material curing channel 601 is provided with infrared radiation heating plates 602 above and below, the roll material curing device channel 601 is symmetrically provided with infrared radiation heating plates 602 above and below, and the front and back of the roll material are cured respectively, the back electrostatic spraying device 4 and the roll material curing device 6 are provided with a level meter 5, the level of the roll material in the back electrostatic spraying device 4 and the roll material curing channel 601 is monitored, the distance between the roll material and the infrared radiation heating plates 602 above and below is monitored by the level meter 5≥20mm, the monitored level data is fed back to the tensioner 8 after the water-cooled roller 702, the tensioner 8 adjusts the level of the roll material by tension, so that the roll material is kept horizontal during spraying in the back electrostatic spraying device 4, and the roll material is kept in the best curing position of the roll material curing channel 601 during curing, so that the front and back of the roll material are uniformly sprayed and completely cured.

[0028] Further, the coiled material cooling device 7 is provided with air cooling device 701 and water cooling roller 702, the air cooling device 701 is arranged after the coiled material curing device 6, the air cooling device 701 is arranged symmetrically up and down, the air cooling device 701 is provided with different control valves 7011, the coiled material front or back can be cooled separately, or the coiled material front and back can be cooled simultaneously, the air cooling device 701 outlet is provided with water cooling roller 702, which further cools the coiled material temperature, the water cooling roller 702 includes water cooling roller one 7021 and water cooling roller two 7022, which are arranged symmetrically up and down, respectively, to cool the coiled material front and back, the water cooling roller one 7021 contacts the coiled material front to cool the coiled material front, the water cooling roller two 7022 contacts the coiled material back to cool the coiled material back, the water cooling roller 702 is provided with tension machine 8 and deviation correction roller 9 after the water cooling roller 702, which is used to adjust the coiled material conveying line speed and prevent the coiled material from deviating during conveying.

[0029] As shown in Figure 1 and Figure 2 , the deviation correction roller 9 is a double roller deviation correction device, including first deviation correction roller 901, second deviation correction roller 902, base 903, power mechanism 905 and limiting mechanism 904, the base 903 is horizontally arranged and installed on a fixed support, the deviation correction roller 901 is horizontally arranged above the base 903, the base 903 is connected with the deviation correction roller 9 through a frame, the first deviation correction roller 901 is horizontally arranged at the left end of the frame, the second deviation correction roller 902 is horizontally arranged at the right end of the frame, the first deviation correction roller 901 and the second deviation correction roller 902 are arranged staggered in the vertical direction, the base 903 is provided with a supporting column at the middle position between the first deviation correction roller 901 and the second deviation correction roller 902, the supporting column is provided with a limiting mechanism 904, the power mechanism 905 is arranged at the left and right ends above the base 903 respectively, which is used to push the frame of the deviation correction roller 9 to move inwards or outwards along the limiting mechanism 904. The specific operation principle is: the coiled material is wound from the upper side of the first deviation correction roller 901, passes through the lower side of the second deviation correction roller 902, and is wound out from the lower side of the second deviation correction roller 902, when the coiled material located in the front or rear of the double roller deviation correction device deviates, the power mechanism 905 pushes the frame of the deviation correction roller 9 to move inwards or outwards along the limiting mechanism 904, so that the deviated coiled material is corrected. Specifically, when the deviation correction roller frame moves outwards along the limiting mechanism 904, it can be used to correct the coiled material deviated outwards in the front of the double roller deviation correction device or the coiled material deviated inwards in the rear of the double roller deviation correction device; when the deviation correction roller frame moves inwards along the limiting mechanism 904, it can be used to correct the coiled material deviated inwards in the front of the double roller deviation correction device or the coiled material deviated outwards in the rear of the double roller deviation correction device.

[0030] The front electrostatic spraying device 2 comprises a front spraying device 201 and a front spraying room 202, the back electrostatic spraying device 4 comprises a back spraying device 401 and a back spraying room 402, the front spraying room 202 is vertically arranged, the coil material input ports of the front spraying room 202 are arranged at the top and the bottom respectively, the front spraying device 201 is arranged on the side opposite to the front spraying room 202, and is arranged for left-right reciprocating transverse spraying of the front of the coil material; the coil material input port and the output port of the back spraying room 402 are arranged at the front side and the rear side respectively, the back spraying device 401 is installed on the top of the back spraying room 402, and is arranged for front-rear reciprocating oblique spraying of the back of the coil material.

[0031] From the distribution of the powder coating device, the powder coating device layout is divided into an upper layer and a ground layer, which are arranged according to the direction of the coil material; the upper layer is provided with a transfer roller 1 for transferring the coil material; the back of the coil material is in contact with the transfer roller 1 and is conveyed to the front electrostatic spraying device 2; the front electrostatic spraying device 2 is vertically arranged on the ground layer; the coil material enters the front spraying room 202 from the top input port of the front spraying room 202; at this time, the front spraying device 201 sprays the front of the coil material left and right; after the front of the coil material is sprayed, the coil material is output from the bottom output port of the front spraying room 202; the bottom output port of the front spraying room 202 is provided with two conveying rollers 3; the back of the coil material after being sprayed in the front is in contact with the conveying rollers 3 and is horizontally conveyed to the back electrostatic spraying device 4; the back electrostatic spraying device 4 is horizontally arranged on the ground layer; the front of the coil material is downwardly arranged and enters the back spraying room 402 from the left input port of the back spraying room 402; at this time, the back spraying device 401 sprays front and back along the width direction of the coil material; the back of the coil material after being sprayed in the back is horizontally conveyed to the right output port of the back spraying room 402 and is output; a verticality instrument 5, a coil material curing device 6, a coil material cooling device 7, a tension machine 8 and a deviation roller 9 are arranged on the ground layer along the horizontal conveying direction of the coil material.

[0032] The front electrostatic spraying device 2 comprises a front spraying device 201 and a front spraying room 202, the back electrostatic spraying device 4 comprises a back spraying device 401 and a back spraying room 402, the front spraying room 202 is vertically arranged, the coil material input ports of the front spraying room 202 are arranged at the top and the bottom respectively, the front spraying device 201 is arranged on the side opposite to the front spraying room 202, and is arranged for left-right reciprocating transverse spraying of the front of the coil material; the coil material input port and the output port of the back spraying room 402 are arranged at the front side and the rear side respectively, the back spraying device 401 is installed on the top of the back spraying room 402, and is arranged for front-rear reciprocating oblique spraying of the back of the coil material.

[0033] The above only describes the preferred embodiments of the present application, and does not limit the implementation and protection scope of the present application; for those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the content of the present application should be included in the protection scope of the present application.

Claims

1. A powder coating apparatus for double-sided spray coating of a web material, characterized by: A transfer roller, a front electrostatic spraying device, a conveying roller, a back electrostatic spraying device, a sag meter, a web curing device, a web cooling device, a water cooling roller, a tension machine and a deviation correction roller are sequentially arranged along the web conveying direction. The front electrostatic spraying device and the back electrostatic spraying device alternately spray the front and back of the web, respectively. The transfer roller is arranged directly above the front electrostatic spraying device, with the front of the web facing upward from the web conveying direction, so that the front of the web is sprayed when conveyed to the front electrostatic spraying device. The conveying roller is arranged obliquely below the front electrostatic spraying device, with the front of the web facing downward along the horizontal conveying direction of the web, so that the back of the web is sprayed when conveyed to the back electrostatic spraying device. The web curing device is provided with a web curing channel, and infrared radiation heating plates are arranged above and below the web curing channel to cure the front and back of the web, respectively. The back electrostatic spraying device and the web curing device are provided with a sag meter to monitor the sag of the web in the back electrostatic spraying device and the web curing channel. The monitored sag data is fed back to the tension machine after the water cooling roller. The tension machine adjusts the tension of the web to keep the web horizontal when sprayed in the back electrostatic spraying device and to keep the web in the optimal curing position of the web curing channel when cured, so that the front and back of the web are uniformly sprayed and completely cured. The web cooling device is provided with an air cooling device and a water cooling roller. The air cooling device is arranged after the web curing device, and the water cooling roller is arranged at the outlet of the air cooling device to further cool the temperature of the front and back of the web. The water cooling roller is provided with a tension machine and a deviation correction roller to adjust the conveying line speed of the web and prevent the web from deviating during conveying.

2. The web double-sided powder coating apparatus of claim 1, wherein: The front electrostatic spraying device comprises a front sprayer and a front spraying house, and the back electrostatic spraying device comprises a back sprayer and a back spraying house. The front spraying house is vertically arranged, and the web input ports of the front spraying house are arranged at the top and bottom, respectively. The front sprayer is arranged on the opposite side of the front spraying house and is arranged for left-right reciprocating horizontal spraying of the front of the web. The web input port and the output port of the back spraying house are arranged on the front side and the rear side, respectively. The back sprayer is mounted on the top of the back spraying house and is arranged for front-back reciprocating downward spraying of the back of the web.

3. The web double-sided powder coating apparatus of claim 1, wherein: The web curing device channel is provided with infrared radiation heating plates, and the infrared radiation heating plates are symmetrically arranged above and below the web curing device channel. The distance between the web and the infrared radiation heating plates is greater than or equal to 20 mm, which is monitored by the sag meter.

4. The web double-sided powder coating apparatus of claim 1, wherein: The air cooling device is symmetrically arranged above and below, and different control valves are arranged at the air outlet of the air cooling device. The air cooling device can be used to cool the front or back of the web or to cool both sides of the web.

5. The web double-sided powder coating apparatus of claim 1, wherein: The water cooling roller comprises a first water cooling roller and a second water cooling roller, which are symmetrically arranged above and below to cool the front and back of the web, respectively.

6. The web double-sided powder coating apparatus of claim 1, wherein: The deviation correction roller is a double-roller deviation correction device, which comprises a first deviation correction roller, a second deviation correction roller, a base, a power mechanism and a limiting mechanism.

7. The web double-sided powder coating apparatus of claim 1, wherein: The powder coating device layout is divided into an upper layer and a ground layer, which is arranged according to the running direction of the coil material, the upper layer is provided with a transfer roller for transferring the coil material, the back surface of the coil material contacts the transfer roller and is conveyed to the front surface electrostatic spraying device, the front surface electrostatic spraying device is vertically arranged on the ground layer, the coil material enters the front surface spraying room from the top input port of the front surface spraying room, the coil material is sprayed on the front surface and is output from the bottom output port of the front surface spraying room, the bottom output port of the front surface spraying room is provided with two conveying rollers, the back surface of the coil material after front surface spraying contacts the conveying rollers and horizontally conveys the coil material to the back surface electrostatic spraying device, the back surface electrostatic spraying device is horizontally and transversely arranged on the ground layer, the front surface of the coil material enters the back surface spraying room from the left side input port of the back surface spraying room with the front surface downward, at this time, the back surface sprayer sprays forward and backward along the width direction of the coil material, the coil material after back surface spraying is horizontally conveyed to the right side output port of the back surface spraying room, and a plumb line device, a coil material curing device, a coil material cooling device, a tension machine and a deviation correcting roller are arranged along the horizontal conveying direction of the coil material on the ground layer.

8. The web double-sided powder coating apparatus of claim 1, wherein: The powder coating sprayed by the sprayer of the front surface electrostatic spraying device and the powder coating sprayed by the sprayer of the back surface electrostatic spraying device can be one or both.

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