Production and coating device for PET (Polyethylene Terephthalate) film coating material

Abstract

The utility model discloses a PET (Polyethylene Terephthalate) film coating material production coating device which comprises a base, a water collecting hole is formed in the top of the base, and an unwinding roller and a winding roller are respectively and rotationally mounted on two sides of the top of the base; a first mounting frame, a second mounting frame and a third mounting frame are fixedly mounted at the top of the base, moving wheels are rotatably mounted at four corners of the bottom of the base, a fixing rod is fixedly mounted at the top of the first mounting frame, a first motor is fixedly mounted on the fixing rod, and a stirring box is fixedly mounted at the top of the fixing rod; a second motor is fixedly mounted at the top of the stirring box, and two rotating shafts are rotationally mounted in the stirring box. The coating device for PET film coating material production is simple in structure and convenient to use, a coating solution can be well attached to the surface of a PET film, the thickness of a coating is uniform, resource waste is caused, and the production efficiency of the PET film coating material is improved.

Description

Technical Field

[0001] This utility model relates to the field of PET film material production technology, specifically to a PET film material production coating device. Background Technology

[0002] PET (polyethylene terephthalate) material has excellent heat and cold resistance, good chemical resistance, and oil resistance, and is widely used in packaging for cosmetics, food, electronics, toys, printing, and other industries. To further improve the performance of PET material, such as antistatic properties, abrasion resistance, and corrosion resistance, it is often necessary to coat its surface with a film by applying specific adhesives or materials to improve or enhance the surface properties of the PET film.

[0003] Patent application number CN202223491944.2 discloses a coating device for producing PET antistatic film, including a PET film, a feeding roller, a coating roller, a drying chamber, and a winding roller. Two guide rollers are arranged to the right of the feeding roller, with a thickness measuring instrument between them. A tension roller is arranged to the right of the guide roller, with a corona discharge box on top of it. A pressure roller and a coating roller are arranged adjacent to each other to the right of the tension roller. A collection box is located on the bottom of the coating roller, and a coat hanger-type liquid distributor is arranged on top of it. The top of the coat hanger-type liquid distributor is connected to a hopper via a pipe. The top of the hopper is connected to three containers via pipes. The collection box is connected to the hopper via a pipe. The guide roller and the drying chamber are located to the right of the coating roller. The presence of the containers allows for the addition of coatings and adhesives for mixing. The corona discharge box, placed before coating, ensures better adhesion of the coating to the film after passing through the coating device, thus improving the quality of the finished product.

[0004] However, since PET is an organic polymer addition polymer, the coating solution cannot adhere well to the surface of the PET film, resulting in uneven coating thickness, incomplete coating, and a lot of coating solution falling off during the coating process, which wastes resources.

[0005] Based on this, this solution proposes a coating device for producing PET film-coated materials. Utility Model Content

[0006] The purpose of this invention is to provide a coating apparatus for producing PET film-coated materials, 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: a PET film coating material production coating device, comprising a base, a water collection hole on the top of the base, and an unwinding roller and a take-up roller rotatably mounted on both sides of the top of the base, respectively; a first mounting frame, a second mounting frame, and a third mounting frame fixedly mounted on the top of the base, and movable wheels rotatably mounted on the four corners of the bottom of the base; a fixing rod fixedly mounted on the top of the first mounting frame, a first motor fixedly mounted on the fixing rod, and a mixing tank fixedly mounted on the top of the fixing rod; a second motor fixedly mounted on the top of the mixing tank, and two rotating shafts rotatably mounted inside the mixing tank. Multiple stirring rods are fixedly sleeved on each of the two rotating shafts, and auxiliary gears are fixedly sleeved on the top of each of the two rotating shafts. A main gear that meshes with the two auxiliary gears is fixedly sleeved on the output shaft of the second motor. The fixed rod has a mounting hole, and two reciprocating screws are rotatably installed in the mounting hole. A nozzle is threaded onto each of the two reciprocating screws. The output shaft of the first motor is fixedly connected to the corresponding reciprocating screw. A connecting hose is fixedly installed between each nozzle and the mixing tank. A feed pipe is fixedly installed on one side of the mixing tank. An electric telescopic rod is fixedly installed on the second mounting frame, and a coating roller is fixedly installed on the output shaft of the electric telescopic rod.

[0008] Preferably, a drying box is fixedly installed on the third mounting bracket, and two fans are fixedly installed on the drying box, with multiple air outlets at the bottom of the drying box.

[0009] Using the above technical solution, the coating solution on the material can be dried by activating the fans in the two drying boxes to generate airflow.

[0010] Preferably, a filter screen is fitted inside the water collection hole, and a receiving box is fitted at the bottom of the base.

[0011] Using the above technical solution, the extra paint that falls off during the spraying process of the two nozzles can be filtered out by the filter screen, and the extra paint that falls off can be received by the receiving box.

[0012] Preferably, a push rod is fixedly installed on the base.

[0013] By adopting the above technical solution, the push rod, combined with the four wheels at the bottom corners of the base, can easily move the entire device, increasing its portability.

[0014] Preferably, the threads of the two reciprocating lead screws are arranged in opposite directions, a slide rail is fixedly installed in the mounting hole, and two sliders are slidably installed on the slide rail, with each slider being fixedly connected to a corresponding nozzle.

[0015] By adopting the above technical solution, the two nozzles can move in opposite directions, and the movement of the nozzles is facilitated by the slide bar and slider.

[0016] Preferably, a control panel is fixedly mounted on the base.

[0017] By adopting the above technical solution, a series of electrical structures can be easily controlled through the control panel.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] First, fix one end of the material roll on the unwinding roller to the take-up roller. Then, add the coating solution into the mixing tank through the feed pipe. Start the second motor to drive the main gear to rotate, which in turn drives the two auxiliary gears to rotate, which in turn drives the two rotating shafts to rotate, which in turn drives the multiple stirring rods to rotate, thus uniformly stirring the coating solution in the mixing tank. After stirring is complete, turn off the second motor and introduce the coating solution into the two nozzles through the two connecting hoses. Start the transmission structure connected to the take-up roller to drive the take-up roller to rotate, thus winding up the material. During this process, start the first motor to drive the rotation of the two reciprocating screws, which drive the two nozzles to move back and forth, thus uniformly spraying the coating solution onto the material. During this process, start the electric telescopic rod to drive the coating roller to move downward, which can spread the coating solution evenly on the material.

[0020] Second, by activating the fans in the two drying boxes, the coating solution on the material can be dried. The filter screen can filter out the extra paint that falls off during the spraying process of the two nozzles, and the receiving box can collect the extra paint that falls off, thus reducing the waste of resources.

[0021] Third, this utility model has a simple structure and is easy to use. The PET film coating device described herein can coat the solution and adhere it well to the surface of the PET film, resulting in a uniform coating thickness. This reduces resource waste and increases the production efficiency of PET film materials. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present utility model;

[0023] Figure 2 This is a side perspective view of the present invention;

[0024] Figure 3 This is a side perspective view of the present invention;

[0025] Figure 4 This is a perspective view of the internal structure of the mixing tank of this utility model.

[0026] In the diagram: 1. Base; 2. Moving wheel; 3. Third mounting bracket; 4. Second mounting bracket; 5. First mounting bracket; 6. Control panel; 7. Receiver box; 8. Push rod; 9. Unwinding roller; 10. Filter screen; 11. Mixing tank; 12. Fan; 13. Drying box; 14. Water collection hole; 15. Rewinding roller; 16. Electric telescopic rod; 17. Coating roller; 18. Fixing rod; 19. Mixing rod; 20. Rotating shaft; 21. Secondary gear; 22. Main gear; 23. Second motor; 24. Feed pipe; 25. First motor; 26. Connecting hose; 27. Nozzle; 28. Reciprocating screw. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4 This utility model provides a technical solution: a PET film coating material production coating device, including a base 1, a water collection hole 14 on the top of the base 1, and an unwinding roller 9 and a winding roller 15 rotatably mounted on the two sides of the top of the base 1, respectively. A first mounting frame 5, a second mounting frame 4, and a third mounting frame 3 are fixedly mounted on the top of the base 1, and movable wheels 2 are rotatably mounted on the four corners of the bottom of the base 1. A fixing rod 18 is fixedly mounted on the top of the first mounting frame 5, a first motor 25 is fixedly mounted on the fixing rod 18, and a mixing tank 11 is fixedly mounted on the top of the fixing rod 18. A second motor 23 is fixedly mounted on the top of the mixing tank 11, and two rotating shafts 20 are rotatably mounted inside the mixing tank 11. Multiple stirring rods 19 are fixedly sleeved on each of the two rotating shafts 20, and a secondary gear 2 is fixedly sleeved on the top of each of the two rotating shafts 20. 1. A main gear 22, which meshes with two auxiliary gears 21, is fixedly sleeved on the output shaft of the second motor 23. A mounting hole is provided on the fixing rod 18, and two reciprocating screws 28 are rotatably installed in the mounting hole. A nozzle 27 is threaded onto each of the two reciprocating screws 28. The threads of the two reciprocating screws 28 are set in opposite directions. A slide rail is fixedly installed in the mounting hole, and two sliders are slidably installed on the slide rail. The two sliders are fixedly connected to the corresponding nozzles 27. The output shaft of the first motor 25 is fixedly connected to the corresponding reciprocating screw 28. A connecting hose 26 is fixedly installed between each of the two nozzles 27 and the mixing tank 11. A feed pipe 24 is fixedly installed on one side of the mixing tank 11. An electric telescopic rod 16 is fixedly installed on the second mounting frame 4, and a coating roller 17 is fixedly installed on the output shaft of the electric telescopic rod 16.

[0029] In this embodiment, the base 1 is made of welded steel plate, with a water collection hole 14 in the center of the top for collecting overflow liquid during operation. The four corners of the base 1 are equipped with rotating wheels 2 with brakes via rotating shafts, facilitating overall movement and positioning of the device. The unwinding roller 9 and the winding roller 15 are symmetrically mounted on both sides of the base 1 via bearing seats. The unwinding roller 9 is equipped with an electromagnetic brake, and the winding roller 15 is connected to a servo drive motor. The first mounting frame 5, the second mounting frame 4, and the third mounting frame 3 are arranged sequentially at intervals on the top of the base 1. A fixing rod 18 is welded to the top of the first mounting frame 5, on which a mixing tank 11 is integrated. The mixing tank 11 is a double-layer stainless steel structure, connected to the top of the fixing rod 18 via a flange. A feed pipe 24 is located at the top of the mixing tank 11. Two rotating shafts 20 are arranged parallel to each other inside the mixing tank 11. Six sets of cross-shaped stirring rods 19 are welded equidistantly on each rotating shaft 20, with an included angle of 45° between adjacent stirring rods. The tops of the two rotating shafts are connected to a secondary gear 21 via keys. The second motor 23 is fixed by bolts. At the top of the box, the main gear 22 connected to the output shaft forms a symmetrical meshing transmission with two auxiliary gears 21. The fixed rod 18 has a mounting hole inside, and two reciprocating screws 28 with opposite directions of rotation are horizontally installed in the mounting hole. The two reciprocating screws 28 are fixedly connected at their close ends. The first motor 25 drives the corresponding reciprocating screws 28 to rotate synchronously through a coupling. The nozzle 27 is made of stainless steel, and its threaded sleeve is precisely matched with the screw 28. The slide rail system is a linear guide rail. The slider is connected to the nozzle 27 by bolts to ensure that the nozzle moves back and forth along a predetermined trajectory. The connecting hose 26 is made of PTFE material, and its two ends are connected to the discharge port of the mixing tank 11 and the inlet of the nozzle 27 respectively through quick connectors. The second mounting frame 4 is equipped with an electric telescopic rod 16. The electric telescopic rod 16 adopts a ball screw structure. Its output end is equipped with a chrome-plated coating roller 17 through a clamp. The axis of the coating roller 17 is set at a 15-degree angle with the axis of the unwinding roller 9. The contact pressure between the roller surface and the substrate is adjusted in real time through a pressure sensor.

[0030] Workflow Description:

[0031] 1. The substrate is unwound by the unwinding roller 9 and enters the coating station through the guide roller group in sequence;

[0032] 2. The second motor 23 drives the main gear 22 to drive the double stirring rods 19 to perform differential stirring. The coating is pressurized by the screw pump and then delivered to the nozzle 27 through the connecting hose 26.

[0033] 3. The first motor 25 drives the reciprocating screw 28 to make the two spray nozzles 27 reciprocate left and right, so as to achieve a Z-shaped coverage of the spraying trajectory;

[0034] 4. The electric telescopic rod 16 adjusts the pressing depth of the coating roller 17 according to the preset parameters to complete the quantitative coating;

[0035] 5. The treated substrate is wound up under constant tension by take-up roller 15.

[0036] This embodiment ensures coating uniformity through a dual-shaft differential stirring system, achieves consistent film thickness through a symmetrical reciprocating spraying mechanism, adapts to different coating thickness requirements through an electrically adjustable coating roller, and facilitates equipment movement through the configuration of movable wheels.

[0037] Combination Figure 1-4 As shown, in this embodiment, a drying box 13 is fixedly installed on the third mounting bracket 3, and two fans 12 are fixedly installed on the drying box 13, and multiple air outlets are opened at the bottom of the drying box 13.

[0038] In this embodiment, a drying system is added based on the previous embodiment. The specific structure includes:

[0039] The third mounting bracket 3 is welded from a 304 stainless steel frame. A drying box 13 is fixed to its top with bolts. The drying box 13 is a segmented aluminum alloy box with its length direction consistent with the direction of the substrate's movement. The box has three layers of unlabeled airflow channels inside. Two centrifugal fans 12 are symmetrically installed on the top. The fans 12 are driven by DC brushless motors with adjustable speed range. The bottom of the box has an array of conical air outlets stamped and formed. The diameter of the outlets decreases gradually along the direction of the substrate's movement, and the center distance between adjacent outlets is the same.

[0040] Drying box 13 achieves directional drying through the following structure:

[0041] Airflow guiding system: The three-layer airflow guiding channel corresponds to the upper, middle and lower air ducts respectively. The upper air duct is equipped with a 45° inclined airflow guide plate, and the middle and lower air ducts are equipped with honeycomb rectifiers.

[0042] Temperature control module: A PTC heating element is embedded in the cabinet interlayer, and the operating temperature range is adjustable;

[0043] Wind speed control: Independent speed regulation of dual fans 12 is achieved through frequency converter, supporting synchronous or differential operation modes.

[0044] Technical benefits: Improved drying efficiency: Shorter processing time and lower unit energy consumption compared to traditional natural air drying;

[0045] Process adaptability: By adjusting the combination of fan speed and temperature, it can adapt to the drying requirements of different coatings, such as solvent-based and water-based coatings.

[0046] Special note: The distance between the drying box 13 and the coating roller 17 is set to 1.2-1.8m. An infrared thickness gauge is installed within this distance range to monitor the wet film thickness in real time. The monitoring data is fed back to the PLC control system to automatically adjust the coating pressure and drying parameters, forming a closed-loop control.

[0047] Combination Figure 1-3As shown, in this embodiment, a filter screen 10 is fitted inside the water collection hole 14, and a receiving box 7 is fitted at the bottom of the base 1.

[0048] In this embodiment: the filter screen 10 is a detachable stainless steel mesh plate, installed at an angle below the spray head 27, with a mesh size of 80-120 mesh, used to intercept dripping impurities and clumps of paint during spraying. The receiving box 7 is located directly below the filter screen 10, with an inclined flow-guiding structure inside. Its bottom is connected to the mixing tank 11 via a return pipe 8. The receiving box 7 collects the filtered liquid paint and pumps it back to the mixing tank for recycling via the return pipe 8. Workflow: Paint dripping during spraying is filtered by the filter screen 10, and the liquid paint flows into the receiving box 7, while impurities are intercepted on the surface of the filter screen. The paint in the receiving box 7 is automatically returned to the mixing tank 11 via the return pipe 8, achieving paint recycling and reuse. Note: The filter screen 10 is quickly installed and removed using a sliding rail clip. The receiving box 7 has a visible liquid level window at the bottom for easy maintenance and monitoring.

[0049] Combination Figure 1-3 As shown, a push rod 8 is fixedly installed on the base 1.

[0050] In this embodiment, the push rod 8 can be set in a U-shape. The push rod 8, together with the four moving wheels 2 at the bottom corners of the base 1, can facilitate the movement of the entire device and increase the portability of the device.

[0051] Combination Figure 1-3 As shown, a control panel 6 is fixedly installed on the base 1.

[0052] In this embodiment, the control panel 6 is fixed to the operating side of the base 1 by bolts. It has a built-in PLC controller, a touch screen and physical buttons on the surface. The touch screen displays coating speed, temperature and pressure parameters in real time. The control panel 6 has a built-in wireless module that supports remote monitoring via mobile APP. An emergency stop button and a USB data export interface are provided at the bottom of the panel.

[0053] The working principle of this utility model is as follows: First, one end of the material roll on the unwinding roller 9 is fixed to the take-up roller 15. Then, the coating solution is added to the mixing tank 11 through the feed pipe 24. Starting the second motor 23 drives the main gear 22 to rotate, which in turn drives the two auxiliary gears 21, which in turn drives the two rotating shafts 20, which in turn drives the multiple stirring rods 19, thus uniformly stirring the coating solution in the mixing tank 11. After stirring is complete, the second motor 23 is turned off, and the coating solution is introduced into the two nozzles 27 through two connecting hoses 26. Starting the transmission structure connected to the take-up roller 15 drives the take-up roller 15 to rotate. The material can be wound up. During this process, the first motor 25 drives the rotation of two reciprocating screws 28, which in turn drive the two nozzles 27 to move back and forth, thus achieving uniform spraying of the coating solution onto the material. Simultaneously, the electric telescopic rod 16 drives the coating roller 17 to move downwards, spreading the coating solution evenly on the material. Then, the fans 12 in the two drying chambers 13 generate airflow to dry the coating solution on the material. Excess coating material falling off during spraying is filtered out by the filter screen 10 and collected by the receiving box 7, reducing resource waste. This utility model has a simple structure and is easy to use. The described PET film coating device effectively coats the PET film with a uniform coating thickness, reducing resource waste and increasing the production efficiency of PET film materials.

[0054] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating apparatus for producing PET film-coated materials, comprising a base (1), characterized in that: The base (1) has a water collection hole (14) on its top, and a unwinding roller (9) and a winding roller (15) are rotatably installed on both sides of the top of the base (1). The top of the base (1) is fixedly installed with a first mounting frame (5), a second mounting frame (4), and a third mounting frame (3), and the four corners of the bottom of the base (1) are rotatably installed with moving wheels (2). The top of the first mounting frame (5) is fixedly installed with a fixing rod (18), and a first motor (25) is fixedly installed on the fixing rod (18). The top of the fixing rod (18) is fixedly installed with a mixing box (11), and the top of the mixing box (11) is fixedly installed with a second motor (23). Two rotating shafts (20) are rotatably installed inside the mixing box (11). Multiple stirring rods (19) are fixedly sleeved on the two rotating shafts (20). The top of each of the two motors (20) is fixedly fitted with a secondary gear (21). The output shaft of the second motor (23) is fixedly fitted with a main gear (22) that meshes with the two secondary gears (21). The fixed rod (18) has an installation hole. Two reciprocating screws (28) are rotatably installed in the installation hole. Each of the two reciprocating screws (28) is threaded with a nozzle (27). The output shaft of the first motor (25) is fixedly connected to the corresponding reciprocating screw (28). Both nozzles (27) are fixedly installed with a connecting hose (26) between them and the mixing tank (11). A feed pipe (24) is fixedly installed on one side of the mixing tank (11). An electric telescopic rod (16) is fixedly installed on the second mounting frame (4). A coating roller (17) is fixedly installed on the output shaft of the electric telescopic rod (16).

2. The PET film coating device according to claim 1, characterized in that: A drying box (13) is fixedly installed on the third mounting bracket (3). Two fans (12) are fixedly installed on the drying box (13), and multiple air outlets are opened at the bottom of the drying box (13).

3. The PET film coating device according to claim 1, characterized in that: A filter screen (10) is fitted inside the water collection hole (14), and a receiving box (7) is fitted at the bottom of the base (1).

4. The PET film coating device according to claim 1, characterized in that: A push rod (8) is fixedly installed on the base (1).

5. The PET film coating device according to claim 1, characterized in that: The threads of the two reciprocating lead screws (28) are set in opposite directions. A slide rail is fixedly installed in the mounting hole. Two sliders are slidably installed on the slide rail. The two sliders are fixedly connected to the corresponding nozzles (27).

6. The PET film coating device according to claim 1, characterized in that: A control panel (6) is fixedly installed on the base (1).

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