Coating device for polymer decorative film production

Abstract

According to the coating device for polymer decorative film production, the change of the moving speed of a base material is detected in real time through a speed sensor, a control system automatically adjusts the expansion and contraction amount of a piezoelectric ceramic stack according to the speed change, the gap between a first lip plate and a second lip plate is accurately controlled, dynamic control and consistency of the coating thickness are achieved, and meanwhile, the thickness of the base material is accurately controlled. A linear sliding rail is adopted to drive a detection assembly to accurately move along the outer surface of a lip plate, the capacitance value between a reference pole plate and a detection pole plate is measured, parallelism deviation is recorded and calculated in real time, and the problems of uneven coating and irregular edges are avoided; the semi-solidified coating on the lip is firstly scraped by the scraper, and then the cleaning plate performs secondary cleaning under the action of the cleaning liquid, so that the coating quality is effectively prevented from being influenced by residues, the uniformity of the thickness of the coating is ensured, and the purposes of uniform coating and automatic cleaning are achieved.

Description

Technical Field

[0001] The invention relates to a coating device for producing a polymer decorative film, and in particular to a coating device for producing a polymer decorative film applied in the field of decorative films. Background Art

[0002] At present, polymer decorative films are widely used in many fields such as construction, automobiles, electronics, etc. Their surface quality and coating uniformity have an important influence on the performance and appearance of the final product. In the production process of polymer decorative films, the coating device is one of the key equipment, and its performance directly affects the quality of the coating and production efficiency.

[0003] During use, traditional coating devices often experience changes in the substrate movement speed due to wear of the transmission device, which further leads to uneven coating thickness. There is also a lack of an effective parallelism detection mechanism. When intermittent coating is required, when the lip plate is in the closed state, semi-solidified paint is likely to remain on the lip, causing defects such as bubbles, streaks, and spots on the coating surface. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to adjust the lip gap and detect the parallelism of the lip in real time according to the moving speed of the substrate to ensure the uniformity of the coating thickness, and at the same time clean the semi-solidified paint at the lip during intermittent coating to ensure the coating quality.

[0005] In order to solve the above problems, the present invention provides a coating device for producing a polymer decorative film, comprising a first die head and a second die head, wherein a flow balancing groove is provided inside the first die head and the second die head, and the characteristics are as follows: a rectangular groove is provided inside the first die head and the second die head at the bottom of the flow balancing groove, a symmetrically arranged first lip plate and a second lip plate are clamped in the rectangular groove, the bottom ends of the first die head and the second die head are fixedly connected to a mounting beam, the outer ends of the first lip plate and the second lip plate are fixedly connected to a plurality of evenly distributed piezoelectric ceramic stacks, the outer ends of the plurality of piezoelectric ceramic stacks are fixedly connected to a mounting sleeve, the outer ends of the mounting sleeves are fixedly connected to the mounting beam, and the bottom end of the mounting beam is fixedly connected to the mounting sleeve. A linear slide rail is fixedly connected, and a parallelism detection component is fixedly connected to the outer end of the linear slide rail. The parallelism detection component includes a mounting shell fixedly connected to one side of the outer ends of multiple linear slide rails close to each other, the inner wall of the mounting shell is fixedly connected to a reference plate, the inner wall of the mounting shell is slidably connected to a detection plate, the inner wall of the mounting shell is slidably connected to a pre-tightening plate, the outer end of the detection plate is fixedly connected to a detection probe, and the detection probe passes through the pre-tightening plate and is fixedly connected to the pre-tightening plate, the outer end of the pre-tightening plate is fixedly connected to an elastic ring, the bottom end of the elastic ring is fixedly connected to a fixed plate, the outer end of the fixed plate is fixedly connected to the inner wall of the mounting shell, and the detection probe passes through the fixed plate and is slidably connected to the fixed plate;

[0006] The bottom end of the linear slide rail is fixedly connected with a bracket, and the outer ends of the two ends of the multiple brackets close to each other are fixedly connected with a cleaning assembly, and the cleaning assembly includes an installation box fixedly connected to the two ends of the brackets close to each other, and the installation box has a rectangular notch on the top of the installation box, and the inner end of the rectangular notch is slidably connected with a guide plate, the top of the guide plate is fixedly connected with an arc plate, and an arc groove is opened inside the arc plate, the outer end of the arc plate is fixedly connected with an arc flow equalizing plate, and a plurality of evenly distributed overflow holes are opened inside the arc flow equalizing plate, and a wetting groove is opened on the outer side of the arc flow equalizing plate corresponding to the overflow hole, the outer end of the arc flow equalizing plate is fixedly connected with a cleaning plate, and the top of the guide plate is fixedly connected with a liquid guide tube, and the liquid guide tube is fixedly connected to the arc plate.

[0007] In the above-mentioned coating device for producing polymer decorative films, intermittent coating can be achieved, and the lip gap can be adjusted in real time according to the moving speed of the substrate to change the thickness of the coating to ensure the uniformity of the coating thickness. The parallelism of the lip is detected during the interval, and the solidified paint on the lip is cleaned while detecting to ensure the uniformity of the coating.

[0008] As a further improvement of the present application, a pre-tightening piston is fixedly connected to the bottom end of the guide plate, and a liquid storage ring is slidably connected to the outer end of the pre-tightening piston, which can provide a pre-tightening force for the cleaning plate during cleaning, so that the cleaning plate is in close contact with the lip plate, thereby enhancing the cleaning effect.

[0009] As a further improvement of the present application, the inner wall of the liquid storage ring is fixedly connected with a clamping ring, the inner wall of the liquid storage ring is slidably connected with a driving piston, the outer end of the liquid storage ring is fixedly connected with a plurality of symmetrically arranged gas storage cavities, and the plurality of gas storage cavities are all connected to the bottom of the liquid storage ring, and compressed air is stored in advance as the power to drive the cleaning liquid. The gas pressure needs to be close to and less than the pressure at which the one-way valve is opened, so as to facilitate the delivery of cleaning liquid to the cleaning plate.

[0010] As a further improvement of the present application, a pressurized cylinder is fixedly connected to the top of the air storage cavity, a guide groove is provided at the bottom, and the inlet and outlet of the guide groove are curved. The top of the pressurized cylinder is slidingly connected to the guide groove. The shape change of the guide groove can make the piston rod of the pressurized cylinder descend to increase the pressure, thereby further providing power for driving the cleaning fluid and ensuring a stable supply of the cleaning fluid.

[0011] As another improvement of the present application, a partition is fixedly connected to the inner wall of the mounting box, the cavity of the mounting box away from the pressurized cylinder is a collecting cavity, a notch is provided at the top of the mounting box, and a scraper with a blade angle of degrees is provided at the notch, the scraper can scrape off the paint remaining on the lip and enter the collecting cavity for storage.

[0012] As another improvement of the present application, a one-way valve is fixedly connected to the inner wall of the liquid guide tube, and a transparent window is fixedly connected to the outer wall of the liquid storage ring. The one-way valve can prevent the cleaning liquid from evaporating when the lip is not cleaned, and the transparent window can be used to observe the liquid level status in the liquid storage ring.

[0013] In summary, this solution has the following beneficial effects:

[0014] 1. Self-adjustment of lip gap: The speed sensor detects the change of substrate moving speed in real time. The control system automatically adjusts the expansion and contraction of the piezoelectric ceramic stack according to the speed change, accurately controls the gap between the first lip plate and the second lip plate, effectively compensates for the change of substrate speed caused by the wear of the transmission device, and realizes dynamic control and consistency of coating thickness.

[0015] 2. Parallelism detection: The linear slide rail drives the detection component to move precisely along the outer surface of the lip plate. The detection probe maintains close contact with the surface of the lip plate under the action of the elastic ring. Accurate detection is achieved by measuring the capacitance value between the reference plate and the detection plate. The data acquisition card records the capacitance value and displacement change in real time, accurately calculates the parallelism deviation of each measuring point, and effectively avoids uneven coating and irregular edges caused by the parallelism deviation of the lip plate.

[0016] 3. Lip self-cleaning: During intermittent coating, a double cleaning mechanism is adopted. The linear slide rail drives the cleaning component to move. The scraper first scrapes off the semi-solidified coating on the lip, and then the cleaning plate performs a secondary cleaning on the lip under the action of the cleaning liquid to ensure the cleanliness of the lip and avoid residues affecting the quality of the next coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the first partial view of this application;

[0018] Figure 2 A side cross-sectional view of the coating device of the present application;

[0019] Figure 3 This is the second partial view of this application;

[0020] Figure 4 This is the third partial view of this application;

[0021] Figure 5 This is the fourth partial view of this application;

[0022] Figure 6 For this application Figure 3 A top view of

[0023] Figure 7 For this application Figure 6 AA section view;

[0024] Figure 8 For this application Figure 7BB cross-sectional view;

[0025] Fig. 9 For this application Figure 7 CC section view;

[0026] Fig.10 This is a schematic diagram of the overall structure of this application.

[0027] Description of the numbers in the figure:

[0028] 1. First die head; 2. Second die head; 3. Flow balancing groove; 4. Rectangular groove; 5. First lip plate; 6. Second lip plate; 7. Mounting beam; 8. Piezoelectric ceramic stack; 9. Mounting sleeve; 10. Linear guide rail; 11. Mounting housing; 1101. Reference plate; 1102. Detection plate; 1103. Preload plate; 1104. Detection probe; 1105. Elastic ring; 1106. Fixing plate; 12. Bracket; 13. Mounting Packing body; 14, guide plate; 15, arc plate; 16, arc-shaped flow equalizing plate; 1601, overflow hole; 1602, wetting groove; 17, cleaning plate; 18, liquid guide tube; 19, pre-tightening piston; 20, liquid storage ring; 21, retaining ring; 22, driving piston; 23, gas storage cavity; 24, pressurized cylinder; 25, guide groove; 26, partition; 27, collecting cavity; 28, scraper; 29, one-way valve; 30, transparent window. DETAILED DESCRIPTION

[0029] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-2 and Figure 9-10A coating device for producing a polymer decorative film is shown, comprising a first die head 1 and a second die head 2, wherein a flow balancing groove 3 is provided inside the first die head 1 and the second die head 2, and characterized in that a rectangular groove 4 is provided inside the first die head 1 and the second die head 2 at the bottom of the flow balancing groove 3, wherein a symmetrically arranged first lip plate 5 and a second lip plate 6 are clamped in the rectangular groove 4, a mounting crossbeam 7 is fixedly connected to the bottom ends of the first die head 1 and the second die head 2, a plurality of uniformly distributed piezoelectric ceramic stacks 8 are fixedly connected to the outer ends of the plurality of piezoelectric ceramic stacks 8, a mounting sleeve 9 is fixedly connected to the outer ends of the mounting sleeve 9, and the outer ends of the mounting crossbeam 7 are fixedly connected, a linear guide rail 10 is fixedly connected to the bottom end of the mounting crossbeam 7, and a parallelism detection component is fixedly connected to the outer end of the linear guide rail 10, The linear detection component includes a mounting shell 11 fixedly connected to one side of the outer ends of the plurality of linear guide rails 10 close to each other, a reference plate 1101 is fixedly connected to the inner wall of the mounting shell 11, a detection plate 1102 is slidably connected to the inner wall of the mounting shell 11, a pre-tightening plate 1103 is slidably connected to the inner wall of the mounting shell 11, a detection probe 1104 is fixedly connected to the outer end of the detection plate 1102, and the detection probe 1104 penetrates the pre-tightening plate 1103 and is fixedly connected to the pre-tightening plate 1103, an elastic ring 1105 is fixedly connected to the outer end of the pre-tightening plate 1103, a fixed plate 1106 is fixedly connected to the bottom end of the elastic ring 1105, an outer end of the fixed plate 1106 is fixedly connected to the inner wall of the mounting shell 11, and the detection probe 1104 penetrates the fixed plate 1106 and is slidably connected to the fixed plate 1106;

[0032] When the polymer decorative film is coated, the wear of the transmission system will cause the movement speed of the substrate to change, causing the thickness of the coating to change and the consistency to be poor. When the speed sensor detects that the movement speed of the substrate has changed, the speed sensor will transmit the substrate material to the control system. The control system controls the synchronous movement of multiple piezoelectric ceramic stacks 8 on the first die 1 and the second die 2 according to the speed, changes the gap between the first lip plate 5 and the second lip plate 6, changes the coating amount, and maintains the consistency of the coating thickness. When intermittent coating is required, the control system controls the synchronous movement of multiple piezoelectric ceramic stacks 8 on the first die 1 and the second die 2 to make the lip gap zero. When closed, the linear slide 10 will move quickly to drive the parallelism detection component and the cleaning component to clean the lip once, and then return the dust during the next interval. Another cleaning and parallelism test is performed. During the test, the linear slide 10 drives the entire test assembly to move along the outer surfaces of the first lip plate 5 and the second lip plate 6. The test probe 1104 is in close contact with the outer surfaces of the first lip plate 5 and the second lip plate 6 under the elastic force of the elastic ring 1105. In this state, the distance between the reference electrode 1101 and the test electrode 1102 is used as the initial value, and the test probe 1104 is moved along the outer ends of the first lip plate 5 and the second lip plate 6 to measure the capacitance value between the plates point by point. The capacitance value and its corresponding displacement change are recorded in real time by the data acquisition card, and the parallelism deviation of each measuring point is calculated, thereby achieving the purpose of parallelism detection and avoiding the problem of uneven coating and uneven coating edge caused by the parallelism deviation between the first lip plate 5 and the second lip plate 6.

[0033] The second implementation method:

[0034] Figure 3-8 It is shown that the bottom end of the linear slide rail 10 is fixedly connected with a bracket 12, and the outer ends of the two ends of the multiple brackets 12 that are close to each other are fixedly connected with a cleaning component, and the cleaning component includes a mounting box 13 fixedly connected with the two ends of the brackets 12 that are close to each other, the mounting box 13, the top of the mounting box 13 is provided with a rectangular notch, the inner end of the rectangular notch is slidably connected with a guide plate 14, the top of the guide plate 14 is fixedly connected with an arc plate 15, and an arc groove is provided inside the arc plate 15, the outer end of the arc plate 15 is fixedly connected with an arc-shaped flow equalizing plate 16, the inside of the arc-shaped flow equalizing plate 16 is provided with a plurality of evenly distributed overflow holes 1601, the outer side of the arc-shaped flow equalizing plate 16 corresponding to the overflow holes 1601 is provided with a wetting groove 1602, the outer end of the arc-shaped flow equalizing plate 16 is fixedly connected with a cleaning plate 17, the top of the guide plate 14 is fixedly connected with a liquid guide tube 18, and the liquid guide tube 18 is fixedly connected to the arc plate 15.

[0035] When the lip needs to be cleaned during intermittent coating or shutdown, the linear slide 10 will drive the cleaning component on the bracket 12 to move together. Before cleaning, the scraper 28 on the collection cavity 27 will scrape off the solidified paint on the lip, and the scraped paint will enter the collection cavity 27 for collection and storage. When moving, the piston rod of the pressurizing cylinder 24 contacts the guide groove 25 and slides along the arc surface of the guide groove 25, which can pressurize the piston rod of the pressurizing cylinder 24 and move downward, so that the gas in the gas storage cavity 23 is pressurized, and the gas pressure in the gas storage cavity 23 drives the driving piston 22 along the liquid storage cavity 23. The inner wall of the ring 20 moves upward, causing the cleaning liquid in the liquid storage ring 20 to move upward under pressure. The pressurized cleaning liquid pushes the pre-tightening piston 19 to move upward to generate a pre-tightening force, so that the cleaning plate 17 is in close contact with the surface of the lip. At the same time, the pressure of the cleaning liquid forces the one-way valve 29 to open, and the cleaning liquid enters the arc-shaped cavity formed by the arc-shaped plate 15 and the arc-shaped flow-equalizing plate 16 through the liquid guide tube 18, and then overflows into the wetting groove 1602 through the overflow hole 1601 to uniformly wet the cleaning plate 17, and the cleaning liquid is continuously supplied, and the wetted cleaning plate 17 performs secondary cleaning on the lip.

[0036] The bottom end of the guide plate 14 is fixedly connected with a pre-tightening piston 19, and the outer end of the pre-tightening piston 19 is slidably connected with a liquid storage ring 20, which can provide pre-tightening force for the cleaning plate 17 during cleaning, so that the cleaning plate 17 is in close contact with the lip plate, thereby enhancing the cleaning effect.

[0037] A retaining ring 21 is fixedly connected to the inner wall of the liquid storage ring 20, and a driving piston 22 is slidably connected to the inner wall of the liquid storage ring 20. The outer end of the liquid storage ring 20 is fixedly connected to a plurality of symmetrically arranged gas storage cavities 23, and the plurality of gas storage cavities 23 are all connected to the bottom of the liquid storage ring 20. Compressed air is stored in advance as the power to drive the cleaning liquid. The gas pressure needs to be close to and less than the pressure at which the one-way valve 29 opens, so as to facilitate the delivery of cleaning liquid to the cleaning plate 17.

[0038] A pressurizing cylinder 24 is fixedly connected to the top of the air storage cavity 23, a guide groove 25 is provided at the bottom of the mounting crossbeam 7, and the inlet and outlet of the guide groove 25 are curved. The top of the pressurizing cylinder 24 is slidably connected to the guide groove 25. The shape change of the guide groove 25 can make the piston rod of the pressurizing cylinder 24 descend to increase the pressure, further providing power for driving the cleaning fluid and ensuring a stable supply of the cleaning fluid.

[0039] A partition 26 is fixedly connected to the inner wall of the installation box 13. The cavity of the installation box 13 away from the pressurized cylinder 24 is a collecting cavity 27. A notch is provided at the top of the installation box 13, and a scraper 28 with a blade angle of 45 degrees is provided at the notch. The scraper 28 can scrape off the paint remaining on the lip and enter the collecting cavity 27 for storage.

[0040] A one-way valve 29 is fixedly connected to the inner wall of the liquid guide tube 18 , and a transparent window 30 is fixedly connected to the outer wall of the liquid storage ring 20 . The one-way valve 29 can prevent the cleaning liquid from volatilizing when the lip is not cleaned, and the transparent window 30 can be used to observe the liquid level status in the liquid storage ring 20 .

[0041] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A coating device for producing a polymer decorative film, comprising a first die head (1) and a second die head (2), wherein the first die head (1) and the second die head (2) are both provided with a flow balancing groove (3), characterized in that: A rectangular groove (4) is provided in the first die head (1) and the second die head (2) at the bottom of the flow balancing groove (3), and a symmetrically arranged first lip plate (5) and a second lip plate (6) are clamped in the rectangular groove (4). The bottom ends of the first die head (1) and the second die head (2) are fixedly connected to a mounting crossbeam (7), and the outer ends of the first lip plate (5) and the second lip plate (6) are fixedly connected to a plurality of evenly distributed piezoelectric ceramic stacks (8). The outer ends of the plurality of piezoelectric ceramic stacks (8) are fixedly connected to a mounting sleeve (9), and the outer ends of the mounting sleeves (9) are fixedly connected to the mounting crossbeam (7). The bottom end of the mounting crossbeam (7) is fixedly connected to a linear slide rail (10), and the outer end of the linear slide rail (10) is fixedly connected to a parallelism detection component, and the parallelism detection component includes a side fixedly connected to the outer ends of the plurality of linear slide rails (10). A mounting shell (11) is connected to the mounting shell (11), the inner wall of the mounting shell (11) is fixedly connected with a reference plate (1101), the inner wall of the mounting shell (11) is slidably connected with a detection plate (1102), the inner wall of the mounting shell (11) is slidably connected with a pre-tightening plate (1103), the outer end of the detection plate (1102) is fixedly connected with a detection probe (1104), and the detection probe (1104) passes through the pre-tightening plate (1103) and is fixedly connected to the pre-tightening plate (1103), the outer end of the pre-tightening plate (1103) is fixedly connected with an elastic ring (1105), the bottom end of the elastic ring (1105) is fixedly connected with a fixing plate (1106), the outer end of the fixing plate (1106) is fixedly connected with the inner wall of the mounting shell (11), and the detection probe (1104) passes through the fixing plate (1106) and is slidably connected to the fixing plate (1106); The bottom end of the linear guide rail (10) is fixedly connected to a bracket (12), and the outer ends of the two ends of the multiple brackets (12) close to each other are fixedly connected to a cleaning assembly, and the cleaning assembly includes a mounting box (13) fixedly connected to the two ends of the brackets (12) close to each other, and the mounting box (13) has a rectangular notch at the top, and a guide plate (14) is slidably connected to the inner end of the rectangular notch, and the top of the guide plate (14) is fixedly connected to an arc plate (15), and the arc plate (15) has a plurality of inner ends. An arc groove is provided, the outer end of the arc plate (15) is fixedly connected to an arc flow equalizing plate (16), a plurality of evenly distributed overflow holes (1601) are provided inside the arc flow equalizing plate (16), a wetting groove (1602) is provided on the outer side of the arc flow equalizing plate (16) corresponding to the overflow holes (1601), the outer end of the arc flow equalizing plate (16) is fixedly connected to a cleaning plate (17), the top end of the guide plate (14) is fixedly connected to a liquid guide tube (18), and the liquid guide tube (18) is fixedly connected to the arc plate (15).

2. The coating device for producing a polymer decorative film according to claim 1, characterized in that: The bottom end of the guide plate (14) is fixedly connected to a pre-tightening piston (19), and the outer end of the pre-tightening piston (19) is slidably connected to a liquid storage ring (20).

3. The coating device for producing a polymer decorative film according to claim 2, characterized in that: The inner wall of the liquid storage ring (20) is fixedly connected to a clamping ring (21), the inner wall of the liquid storage ring (20) is slidably connected to a driving piston (22), and the outer end of the liquid storage ring (20) is fixedly connected to a plurality of symmetrically arranged gas storage cavities (23), and the plurality of gas storage cavities (23) are all in communication with the bottom of the liquid storage ring (20).

4. A coating device for producing a polymer decorative film according to claim 1 or 3, characterized in that: The top end of the gas storage cavity (23) is fixedly connected to a pressurizing cylinder (24), the bottom end of the mounting crossbeam (7) is provided with a guide groove (25), and the inlet and outlet of the guide groove (25) are curved, and the top end of the pressurizing cylinder (24) is slidably connected to the guide groove (25).

5. The coating device for producing a polymer decorative film according to claim 1, characterized in that: A partition plate (26) is fixedly connected to the inner wall of the installation box (13); a cavity of the installation box (13) away from the pressurizing cylinder (24) is a collecting cavity (27); a notch is provided at the top of the installation box (13); and a scraper (28) with a blade angle of 45 degrees is provided at the notch.

6. A coating device for producing a polymer decorative film according to claim 1 or 2, characterized in that: A one-way valve (29) is fixedly connected to the inner wall of the liquid guiding tube (18), and a transparent window (30) is fixedly connected to the outer wall of the liquid storage ring (20).

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