A gilding film production screw air compressor pneumatic auxiliary coating device

Abstract

The utility model belongs to gold stamping film production technical field especially relates to a kind of gilding film production screw air compressor pneumatic auxiliary coating device, including support assembly, raw material conveying unit, pneumatic coating unit and winding control unit, the side of pneumatic coating unit is provided with screw air compressor main body;Through the pneumatic adjusting mechanism of screw air compressor main body+cylinder+sliding bearing block composition, it can drive tensioning roller to move up and down in real time, accurately match substrate coating tension demand, avoid that substrate is broken or wrinkle is caused by too large tension, guarantee different thickness gilding film conveying flatness, adapt to the high requirement of tension stability in electronic tag, high-end packaging and other scenes;While relying on electric push rod coarse adjustment+limiting adjustment plug rod and angle adjustment plug rod fine adjustment double-adjusting mechanism, combined with the design of hard contact abrasion prevention of buffer rubber pad, realize coating head height and angle accurate adjustment, greatly improve coating spray uniformity, reduce coating thickness deviation.

Description

Technical Field

[0001] This utility model belongs to the field of hot stamping film production technology, and in particular relates to a pneumatic auxiliary coating device for a screw air compressor in hot stamping film production. Background Technology

[0002] In the field of hot stamping film production, with the continuous expansion of high-precision applications such as electronic tags and high-end packaging, the market is placing increasingly stringent requirements on the substrate flatness, coating uniformity, and production continuity of hot stamping film. As the core equipment in hot stamping film production, the performance of the coating unit directly determines the quality of the final product. However, its technological development has struggled to keep pace with the upgrading of high-end demands, and traditional coating units still have many technical shortcomings that urgently need to be overcome in actual operation:

[0003] Firstly, the stability of substrate tension control is insufficient. Traditional coating equipment mostly relies on manual adjustment or a single mechanical structure to achieve tension control, which makes it difficult to respond in real time to the conveying needs of substrates of different thicknesses and fluctuations in production speed. This often results in substrate breakage due to excessive tension and coating wrinkles due to insufficient tension, directly damaging the flatness of the substrate during the conveying process and creating potential quality problems for subsequent coating processes.

[0004] Secondly, the coating head adjustment precision is limited. Most devices are only equipped with a coarse height adjustment function, lacking a precise angle fine adjustment mechanism. Furthermore, the hard contact between components during the adjustment process can easily cause wear, leading to a mismatch between the coating head and the coating roller. This results in poor coating uniformity and ultimately significant coating thickness deviation, making it difficult to meet the coating quality requirements of high-precision products.

[0005] The aforementioned problems, combined, have made it difficult for traditional coating equipment to meet the high requirements of precision, stability, and adaptability in high-end hot stamping film production. This has become a key technical bottleneck restricting the upgrading of hot stamping film product quality and the optimization of production efficiency. Therefore, we propose a pneumatically assisted coating device using a screw air compressor for hot stamping film production. Utility Model Content

[0006] The purpose of this invention is to provide a pneumatically assisted coating device for a screw air compressor used in hot stamping film production, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pneumatically assisted coating device for a screw air compressor in hot stamping film production includes a support assembly, a raw material conveying unit, a pneumatic coating unit, and a winding control unit. The pneumatic coating unit is surrounded by the main body of the screw air compressor. The support assembly consists of two symmetrically arranged support side plates, base rods fixedly installed at the front ends of the two support side plates, and two brackets fixedly installed at the front ends of the two base rods. The raw material conveying unit consists of a raw material roll, a stretching roll, and a coating roll rotatably mounted on the two support side plates, and multiple guide rollers rotatably mounted on the two base rods. The pneumatic coating unit consists of a tensioning roll and pneumatic adjustment mechanisms at both ends of the tensioning roll. The winding control unit consists of a winding roll rotatably mounted on the two brackets and a winding drive motor mounted on the side wall of the brackets. Coating heads are located on the two support side plates near the coating rolls, and coating adjustment mechanisms are symmetrically arranged at both ends of the coating heads.

[0009] Preferably, the coating adjustment mechanism includes: a fixing block, which is fixedly installed on the inner wall of the support side plate; an electric push rod is fixedly installed on the fixing block; a connecting block is fixed to the telescopic rod end of the electric push rod; a rotating plate is rotatably installed on the connecting block; a rotating hole is opened in the middle of the rotating plate; a rotating rod is inserted and fixed in the rotating hole at the middle position of the two rotating plates, and the rotating rod is rotatably engaged with the support side plate; an adjusting plate is rotatably installed on the upper inner wall of the rotating plate; an angle fine-tuning component is provided on the adjusting plate; a support plate is fixedly installed between the two adjusting plates; and the coating head is fixedly installed on the upper surface of the support plate.

[0010] Preferably, the angle fine-tuning component includes: a positioning block, which is fixedly installed on the lower part of the adjusting plate. A limit adjusting rod is threadedly installed on the positioning block, and one end of the limit adjusting rod passes through the positioning block and extends between the positioning block and the rotating plate. An adjusting hole is provided on the positioning block and located below the limit adjusting rod. An angle adjusting rod is inserted into the adjusting hole, and the other end of the angle adjusting rod contacts the side wall of the rotating plate. The coefficient of friction between the angle adjusting rod and the adjusting hole is 0.2-0.4.

[0011] Preferably, a buffer pad is fixed on the outer wall of the rotating plate at a position directly opposite the foot of the angle adjustment rod, and the foot of the angle adjustment rod is in contact with the buffer pad.

[0012] Preferably, the pneumatic adjustment mechanism includes: a support base, the support base being fixedly installed on the upper surface of the base rod, a support unit being fixedly installed on the upper surface of the support base, a sliding groove being provided on the support unit, a bearing seat being slidably installed in the sliding groove, a tension roller being rotatably installed between two bearing seats, and a cylinder being fixedly installed on the upper surface of the support unit, the inlet end and outlet end of the cylinder being connected to the output end and input end of the screw air compressor body, respectively.

[0013] Preferably, a controller body is provided on the periphery of the support side plate. The controller body integrates a parameter display screen, an emergency stop button, and function control buttons. The controller body is equipped with a PLC control module, which is connected to the screw air compressor body, cylinder, electric push rod, and winding drive motor to achieve coordinated operation of each component.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Effectively solves the problem of unstable substrate tension control in traditional devices: The pneumatic adjustment mechanism, consisting of a screw air compressor body, cylinder, and sliding bearing seat, can drive the tension roller to move up and down in real time, accurately matching the substrate coating tension requirements. This avoids substrate breakage due to excessive tension or coating wrinkles caused by insufficient tension, ensuring the flatness of hot stamping film substrates of different thicknesses. It is especially suitable for the high requirements of substrate tension stability in the production of high-end hot stamping films such as electronic labels and high-end packaging.

[0016] 2. Overcoming the limitations of insufficient precision in traditional coating head single adjustment: Relying on a dual adjustment mechanism of coarse adjustment by electric push rod + fine adjustment by limit adjustment rod and angle adjustment rod, combined with the design of buffer rubber pad to prevent hard contact wear, it can quickly achieve coarse adjustment of coating head height, and fix precise angle through angle adjustment rod, ensuring the compatibility between coating head and coating roller, greatly improving coating spray uniformity and reducing coating thickness deviation. Attached Figure Description

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the coating adjustment mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the angle fine-tuning component in this utility model;

[0021] Figure 4 This is a schematic diagram of the pneumatic adjustment mechanism in this utility model.

[0022] The markings in the diagram are as follows:

[0023] 1. Support side plate; 2. Raw material roll; 3. Stretching roll; 4. Coating roll; 5. Coating head; 6. Controller body; 7. Base rod; 8. Screw air compressor body; 9. Bracket; 10. Take-up roll; 11. Fixing block; 12. Electric push rod; 13. Connecting block; 14. Rotating plate; 15. Rotating rod; 16. Adjusting plate; 17. Positioning block; 18. Limit adjustment rod; 19. Angle adjustment rod; 20. Buffer pad; 21. Support plate; 22. Guide roller; 23. Support seat; 24. Support unit; 25. Bearing seat; 26. Tensioning roller; 27. Cylinder. Detailed Implementation

[0024] This application provides a pneumatically assisted coating device for a screw air compressor in hot stamping film production. This device effectively solves the problems of unstable substrate tension control, insufficient coating head adjustment accuracy, poor coordination of pneumatic components, and easy impact on substrate positioning during maintenance in traditional hot stamping film coating devices. These issues make it difficult to meet the high requirements for coating uniformity, tension stability, and equipment adaptability in the production of high-end hot stamping films (such as electronic labels and high-end packaging).

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the overall concept of the embodiments of this application is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a pneumatically assisted coating device for a screw air compressor in hot stamping film production. It aims to solve the shortcomings of traditional coating devices, such as large fluctuations in substrate conveying tension, difficulty in precise angle control due to a single adjustment of the coating head, sluggish pneumatic tension response, and easy damage to component positioning during maintenance and disassembly. Through a combined design of layered support components, a dual adjustment mechanism (coating head coarse adjustment + angle fine adjustment), real-time pneumatic tension response, and PLC collaborative control, the device improves its adaptability to hot stamping film substrates of different thicknesses, the accuracy of coating and tension control, and the convenience of maintenance. This meets the high requirements of high-end hot stamping film production for coating uniformity, substrate flatness, and production continuity, while ensuring long-term operational stability and safety.

[0027] The structure and connection relationships of each part of this utility model are as follows:

[0028] Support side plate 1: It has a rectangular plate structure, is made of high-strength stainless steel, and its thickness is adapted to the load-bearing requirements of the roller. The inner side wall is provided with an installation groove that matches the bearing seat 25. The shaft holes of the raw material roll 2 and the coating roll 4 are reserved at both ends respectively. The two are arranged symmetrically to form the core load-bearing frame of the device. It serves as the installation base for the raw material conveying unit and the coating adjustment mechanism. The roller axis is positioned by the bearing seat 25 to avoid the substrate from shifting during conveying and to ensure the stability of the coating path.

[0029] Bottom rod 7: It has a cylindrical hollow structure with an outer diameter that matches the spacing between the support side plate 1 and the bracket 9. It is made of lightweight high-strength alloy and has a fixed plane on its surface that matches the support seat 23. Both ends are fixedly connected to the front ends of the two support side plates 1 and the rear ends of the two brackets 9, respectively. The support side plates and brackets are connected to form a progressive support structure, and at the same time, they provide an installation carrier for the guide roller 22 and the screw air compressor body 8, thus balancing the overall weight distribution of the device.

[0030] Support 9: It has an L-shaped plate structure. The vertical section has a shaft hole that matches the winding roller 10, and the horizontal section has a connection hole that matches the bottom rod 7. The outer wall has a pre-drilled mounting thread hole for the support plate 21. Two supports are symmetrically fixed to the front end of the bottom rod 7. As the core support of the winding control unit, the winding roller 10 is positioned through the shaft hole, and the winding drive motor is fixed in conjunction with the support plate 21 to ensure that the roller rotates coaxially during winding and to avoid the substrate from being deviated during winding.

[0031] Raw material roll 2: It has a cylindrical structure with an outer diameter that matches the inner diameter of the hot stamping film raw material roll. It has rotating shafts at both ends that match the bearing seats 25, and its surface is smooth and burr-free. It is rotatably mounted on one end of the two support side plates 1 through the bearing seats 25. As the unwinding carrier of the hot stamping film substrate, it achieves smooth rotation through the cooperation of the rotating shaft and the bearing seats 25, ensuring that the unwinding speed of the substrate is synchronized with the subsequent processes.

[0032] Stretch roller 3: The structure is adapted to the raw material roll 2, and the surface is provided with a slightly rough anti-slip layer. The length of the rotating shafts at both ends is slightly shorter than that of the raw material roll 2. It is rotatably connected between the two support side plates 1 through an adjustable bracket (rotating plate 14, rotating rod 15, adjusting plate 16), and is located between the raw material roll 2 and the coating roller 4. It moderately stretches the unwound substrate to eliminate the wrinkles of the raw material roll. The anti-slip layer increases the friction with the substrate and avoids slippage during stretching, which affects the flatness of the substrate.

[0033] Coating roller 4: It has a cylindrical structure and is coated with a wear-resistant and corrosion-resistant coating. Its outer diameter is slightly larger than that of the stretching roller 3. The two ends of the roller are interference-fitted with the bearing seats 25. It is rotatably mounted between the two support side plates 1 through the bearing seats 25, close to the bottom of the coating head 5. It drives the substrate to pass through the coating head 5 at a uniform speed. It works with the coating head 5 to achieve uniform coating transfer. The wear-resistant coating ensures the surface flatness after long-term use and avoids uneven coating thickness.

[0034] Guide roller 22: It has a small cylindrical structure and is made of polytetrafluoroethylene (non-stick and wear-resistant). It has short shafts at both ends that are compatible with bushings. Multiple guide rollers are distributed at intervals along the length of the base rod 7 and are mounted on the two base rods 7 by rotating the bushings. It changes the direction of substrate conveying and accurately guides the stretched substrate between the coating roller 4 and the tension roller 26. The polytetrafluoroethylene material avoids scratches or adhesion to the substrate surface.

[0035] Tension roller 26: It has a cylindrical structure with an outer diameter that matches the coating roller 4. It has rotating shafts at both ends that match the sliding bearing seats 25. It is rotatably mounted between the two support side plates 1 via the sliding bearing seats 25, and is located between the stretching roller 3 and the coating roller 4. By moving up and down, it changes the contact pressure with the substrate, adjusts the tension of the substrate during coating, and avoids excessive tension causing substrate breakage or insufficient tension causing coating wrinkles.

[0036] The pneumatic adjustment mechanism consists of a support base 23, a support unit 24, a sliding bearing seat 25, and a cylinder 27. The support base 23 is rectangular and fixed to the upper surface of the base rod 7. The support unit 24 is elongated and has a groove at the top that matches the sliding bearing seat 25. It is fixed to the upper surface of the support base 23. The cylinder body of the cylinder 27 is fixed to the end of the support unit 24, and the piston rod is fixed to the side wall of the sliding bearing seat 25. The cylinder provides lifting power to the tension roller 26. The piston rod of the cylinder 27 extends and retracts, driving the sliding bearing seat 25 to move along the groove, responding to tension adjustment needs in real time, and ensuring the stability of the substrate tension.

[0037] Coating head 5: It has a long strip nozzle structure with uniformly distributed coating holes at the bottom and fixing ears at both ends that are adapted to support plate 21; it is installed on the upper surface of support plate 21 between two adjusting plates 16 through fixing ears, and is located directly above coating roller 4; it sprays coating on substrate on coating roller 4, the uniform coating holes ensure consistent coating spray volume, and the fixing ears facilitate disassembly and maintenance, avoiding damage to coating position accuracy during maintenance.

[0038] Coating adjustment mechanism: It consists of a fixed block 11, an electric push rod 12, a connecting block 13, a rotating plate 14, a rotating rod 15, an adjusting plate 16, a positioning block 17, a limit adjustment rod 18, an angle adjustment rod 19, a buffer pad 20, and a support plate 21.

[0039] The fixing block 11 is rectangular and is fixed to the inner wall of the supporting side plate 1.

[0040] The cylinder body of the electric push rod 12 is fixed on the fixed block 11, and the piston rod is fixed to the connecting block 13;

[0041] The rotating plate 14 has a rotating hole in the middle that is compatible with the rotating rod 15. One end is rotatably connected to the connecting block 13, and the other end is fixed to the adjusting plate 16.

[0042] The two ends of the rotating rod 15 are fixed to the inner side wall of the support side plate 1;

[0043] The lower part of the adjusting plate 16 is fixed with a positioning block 17. The positioning block 17 is provided with a threaded hole that matches the limit adjusting rod 18 and an adjusting hole that matches the angle adjusting rod 19.

[0044] The buffer pad 20 is fixed at the contact point between the rotating plate 14 and the angle adjustment rod 19;

[0045] The support plate 21 is fixed between the two adjusting plates 16;

[0046] To achieve coarse and fine adjustment of coating head 5: electric push rod 12 drives rotating plate 14 to rotate around rotating rod 15 to complete coarse adjustment of coating head 5 height;

[0047] Limit adjustment rod 18 and angle adjustment rod 19 work together to achieve fine-tuning of the angle, and buffer pad 20 avoids hard contact wear, ensuring that coating head 5 is accurately aligned with coating roller 4.

[0048] The screw air compressor body 8 has a box-type structure, with an interface at the output end that is compatible with the air pipe, and a fixed bracket at the bottom that is compatible with the base rod 7. It is installed on the upper surface of the base rod 7 through the fixed bracket. The output end air pipe is connected to the air inlet end of the cylinder 27, and the input end air pipe is connected to the air source. It provides stable air pressure for the pneumatic adjustment mechanism, ensures the action response speed and thrust stability of the cylinder 27, and avoids air pressure fluctuations from affecting the tension adjustment accuracy.

[0049] Take-up roller 10: It has a cylindrical structure with anti-slip texture on the surface and rotating shafts at both ends that are compatible with couplings; it is rotatably mounted between two brackets 9 via bearings; it receives the coated substrate and neatly winds it up; the anti-slip texture prevents the substrate from slipping and misaligning during winding; the rotating shafts and couplings work together to transmit power to the winding drive motor.

[0050] The winding drive motor has an output shaft with a connection end that is compatible with the coupling and a mounting hole at the bottom that is compatible with the support plate 21. It is fixed to the outer wall of the bracket 9 via the support plate 21, and the output shaft is connected to the rotating shaft of the winding roller 10 via the coupling. It provides precise speed power to the winding roller 10, and the speed is adjusted by the controller to ensure that the winding speed is synchronized with the unwinding and coating speed of the raw material, thus avoiding substrate accumulation or pulling.

[0051] The controller body 6 has a box-like structure. The front integrates a parameter display screen, an emergency stop button, and function control buttons. It has a PLC control module inside and wiring terminals on the back that are compatible with the electric push rod 12, the screw air compressor body 8, the cylinder 27, and the winding drive motor.

[0052] Fixed to the outer wall of the support side plate 1;

[0053] The PLC module coordinates the operation of each component: synchronously adjusts the unwinding, stretching, coating and rewinding speeds, monitors the pressure of cylinder 27 and the position of electric push rod 12 in real time, and triggers an emergency stop in case of abnormality to ensure the safe operation of the equipment and the stability of production.

[0054] Buffer pad 20: Made of elastic rubber, with a thickness that matches the gap between the rotating plate 14 and the angle adjustment rod 19, and a smooth surface free of impurities; fixed at the contact point between the rotating plate 14 and the angle adjustment rod 19; avoids wear caused by hard contact between the angle adjustment rod 19 and the rotating plate 14, and at the same time uses elasticity to help fix the adjustment angle and prevent angle deviation after fine adjustment.

[0055] Working principle of this device

[0056] This device uses substrate conveying, pneumatic tensioning, precision coating, and automatic winding as its core processes. Relying on a framework built with support components, it achieves efficient coating of hot stamping film through the coordinated operation of four major units. The specific working principle is as follows:

[0057] I. Device Start-up and Initial Linkage

[0058] The operator starts the device by connecting the controller body 6 on the side of the support plate. The PLC control module inside the controller simultaneously sends start signals to the screw air compressor body 8, electric push rod 12, winding drive motor and cylinder 27, and each core component enters the standby state. The screw air compressor body 8 first completes the pre-compression, and its output end supplies air to the cylinder 27 through the air pipe to provide a power source for the pneumatic adjustment mechanism. At the same time, the parameter display screen of the controller body 6 displays key parameters such as air compressor pressure and motor speed in real time, which is convenient for the operator to monitor.

[0059] II. Raw material transportation and substrate pretreatment

[0060] Raw material unwinding: Rotate the raw material roll roller 2 installed between the two support side plates 1 to slowly unwind the roll of hot stamping film substrate. The substrate enters the subsequent unit along the preset path.

[0061] Substrate stretching: The substrate first passes through the stretching roller 3 between the supporting side plates 1. The stretching roller 3 stretches the substrate appropriately by rotating itself to eliminate wrinkles and ensure flatness during subsequent coating.

[0062] Guided transition: The stretched substrate enters multiple guide rollers 22 installed on two bottom rods 7. The guide rollers 22 change the direction of the substrate by rotating, and precisely guide the substrate between the coating roller 4 and the tensioning roller 26 to complete the path planning before coating.

[0063] III. Pneumatic tension adjustment

[0064] Before the substrate enters the coating area, the tension needs to be adjusted by the tension roller 26: the controller body 6 sends a pressure signal to the cylinder 27, and the piston rod of the cylinder 27 pushes the bearing seat 25 connected to it;

[0065] The bearing housing 25 slides along the groove on the support unit 24, which drives the tension roller 26, which is rotatably installed between the two bearing housings 25, to move up and down.

[0066] The tension roller 26 adjusts the tension of the substrate by contacting the substrate with friction. When the controller detects that the tension has reached the preset value, the PLC module controls the cylinder 27 to maintain the current pressure, so that the tension roller 26 is stabilized in the target position, avoiding the substrate from shifting or breaking due to tension fluctuations during the coating process.

[0067] IV. Coating Head Adjustment and Precision Coating

[0068] Coating height coarse adjustment: The operator controls the electric push rod 12 through the controller body 6. The electric push rod 12 is fixed on the fixing block 11 on the inner side wall of the support side plate 1. Its telescopic rod end drives the rotating plate 14 to rotate around the rotating rod 15 through the connecting block 13. When the rotating plate 14 rotates, the adjusting plate 16 connected to its upper inner side wall rotates synchronously, thereby driving the support plate 21 between the two adjusting plates 16 to move up and down. Finally, the height and fit of the coating head 5 fixed on the support plate 21 are coarsely adjusted, so that the coating head 5 is initially aligned with the coating roller 4.

[0069] Fine-tuning of coating angle: If further optimization of the coating angle is required, turn the limit adjustment rod 18 on the positioning block 17 at the lower part of the adjustment plate 16 to determine the minimum included angle between the adjustment plate 16 and the rotating plate 14; at the same time, the angle adjustment rod 19 below the positioning block 17 is inserted into the adjustment hole and contacts the buffer pad 20 on the side wall of the rotating plate 14. The friction coefficient of 0.2-0.4 between the angle adjustment rod 19 and the adjustment hole is used to fix the current angle. By adjusting the insertion depth of the angle adjustment rod 19, the opening angle between the lower part of the adjustment plate 16 and the rotating plate 14 is changed, thereby completing the precise fine-tuning of the coating head 5, ensuring that the coating head 5 sprays the coating onto the substrate on the coating roller 4 at a precise angle, and ensuring uniform coating thickness;

[0070] Coating operation: The coating roller 4 rotates synchronously, driving the substrate to pass under the coating head 5 at a uniform speed. The coating head 5 continuously sprays the coating material to complete the coating process of the hot stamping film substrate.

[0071] V. Post-coating winding and process closed loop

[0072] The coated substrate continues to move along the path and eventually enters the area of ​​the take-up roller 10 installed between the two supports 9. The take-up drive motor on the side wall of the support 9 drives the take-up roller 10 to rotate through the coupling. The take-up roller 10 neatly winds up the coated substrate at a speed that matches the unwinding and coating speeds of the raw material. Throughout the process, the controller body 6 coordinates the speed of each component in real time through the PLC module (such as synchronizing the winding speed with the coating speed). If any abnormality occurs (such as excessive tension or motor failure), the operator can quickly cut off the power supply through the emergency stop button to ensure the safety of the device.

[0073] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pneumatically assisted coating device for a screw air compressor in hot stamping film production, comprising a support assembly, a raw material conveying unit, a pneumatic coating unit, and a winding control unit, wherein a screw air compressor body (8) is arranged around the pneumatic coating unit, characterized in that, The support assembly consists of two symmetrically arranged support side plates (1), a base rod (7) fixedly installed at the front end of the two support side plates (1), and two brackets (9) fixedly installed at the front end of the two base rods (7); The raw material conveying unit consists of a raw material roll (2), a stretching roll (3) and a coating roll (4) rotatably mounted on two support side plates (1), and multiple guide rolls (22) rotatably mounted on two bottom rods (7); The pneumatic coating unit consists of a tension roller (26) and pneumatic adjustment mechanisms located at both ends of the tension roller (26); The winding control unit consists of a winding roller (10) rotatably mounted on two supports (9) and a winding drive motor mounted on the side wall of the supports (9); Two support side plates (1) are provided with coating heads (5) near the coating roller (4), and coating adjustment mechanisms are symmetrically provided at both ends of the coating heads (5).

2. The pneumatic auxiliary coating device for a screw air compressor in hot stamping film production according to claim 1, characterized in that, The coating adjustment mechanism includes: a fixing block (11), which is fixedly installed on the inner wall of the support side plate (1), an electric push rod (12) is fixedly installed on the fixing block (11), a connecting block (13) is fixedly installed at the telescopic rod end of the electric push rod (12), a rotating plate (14) is rotatably installed on the connecting block (13), a rotating hole is opened in the middle of the rotating plate (14), a rotating rod (15) is inserted and fixed in the rotating hole at the middle position of the two rotating plates (14), and the rotating rod (15) is rotatably engaged with the support side plate (1), an adjustment plate (16) is rotatably installed on the upper inner wall of the rotating plate (14), an angle fine adjustment component is provided on the adjustment plate (16), a support plate (21) is fixedly installed between the two adjustment plates (16), and the coating head (5) is fixedly installed on the upper surface of the support plate (21).

3. The pneumatic auxiliary coating device for a screw air compressor in hot stamping film production according to claim 2, characterized in that, The angle fine-tuning component includes: a positioning block (17), which is fixedly installed on the lower part of the adjusting plate (16). A limit adjusting rod (18) is threadedly installed on the positioning block (17), and one end of the limit adjusting rod (18) passes through the positioning block (17) and extends to the space between the positioning block (17) and the rotating plate (14). An adjusting hole is provided on the positioning block (17) and located below the limit adjusting rod (18). An angle adjusting rod (19) is inserted into the adjusting hole. The other end of the angle adjusting rod (19) contacts the side wall of the rotating plate (14). The coefficient of friction between the angle adjusting rod (19) and the adjusting hole is 0.2-0.

4.

4. The pneumatic auxiliary coating device for a screw air compressor in hot stamping film production according to claim 3, characterized in that, A buffer pad (20) is fixed on the outer wall of the rotating plate (14) at a position directly opposite the foot of the angle adjustment rod (19), and the foot of the angle adjustment rod (19) is in contact with the buffer pad (20).

5. The pneumatic auxiliary coating device for a screw air compressor in hot stamping film production according to claim 1, characterized in that, The pneumatic adjustment mechanism includes: a support base (23), which is fixedly installed on the upper surface of the base rod (7). A support unit (24) is fixedly installed on the upper surface of the support base (23). A sliding groove is provided on the support unit (24). A bearing seat (25) is slidably installed in the sliding groove. The tension roller (26) is rotatably installed between the two bearing seats (25). A cylinder (27) is fixedly installed on the upper surface of the support unit (24). The air inlet and outlet of the cylinder (27) are respectively connected to the output end and input end of the screw air compressor body (8).

6. The pneumatic auxiliary coating device for a screw air compressor in hot stamping film production according to claim 1, characterized in that, The support side plate (1) is provided with a controller body (6) on its periphery. The controller body (6) integrates a parameter display screen, an emergency stop button and function control buttons. The controller body (6) is equipped with a PLC control module. The PLC control module is connected to the screw air compressor body (8), cylinder (27), electric push rod (12) and winding drive motor respectively to realize the coordinated operation of each component.

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