Surface treatment apparatus for biaxially stretched polyester film

Abstract

The utility model provides bidirectional stretching polyester film surface treatment equipment belongs to polyester film production technical field to solve the problem that residual liquid not only can lead to the partial coating of bidirectional stretching polyester film is too thick, destroys the consistency of film surface thickness and influences product performance, and simultaneously still influenced the production continuity problem of film, including support frame, the upper side of liquid storage support fixed connection is in the inside end of support frame, the outside fixed connection of liquid storage support bottom end surface has limit support board, the front end of liquid storage support is set up to coating roller rotation, the rear of coating roller is set up to scraper elasticity, the outside of the bottom end surface of limit support board is set up to clean scraper slide, and the outside of clean scraper and coating roller is set up to clean auxiliary mechanism, and the upper side of the rear end of scraper is set up to audible -visual alarm, and the wear detection mechanism is set up between clean scraper and audible -visual alarm, not only has improved the production continuity of film, and further improved the qualified rate of bidirectional stretching polyester film finished product.

Description

Technical Field

[0001] This utility model belongs to the field of polyester film production technology, and more specifically, it relates to a surface treatment equipment for biaxially oriented polyester film. Background Technology

[0002] In the manufacturing and processing of biaxially oriented polyester film, in order to meet the film's performance requirements, coating equipment is usually used to coat the surface of the biaxially oriented polyester film with antistatic agents, slip agents, or barrier agents to achieve customized surface properties of the polyester film. In the actual application of coating equipment, gravure coating or comma roller coating is usually used to uniformly coat the coating liquid onto the film surface, and after drying, a functional film is formed.

[0003] For example, existing application number CN202021133340.9 discloses a surface treatment device for biaxially oriented polyester film, including an online surface treatment chamber. The online surface treatment chamber contains an online surface treatment structure, which includes a first online surface treatment structure and a second online surface treatment structure. The first and second online surface treatment structures have identical structures. After the polyester film undergoes double-sided surface treatment in the online surface treatment device, the mixed solvent used in the surface treatment layer enhances the adhesion between the film surface and the aluminized layer on one side, while also improving the barrier properties against air and water vapor, ensuring the safety and freshness of food packaging. On the other side, it enhances the adhesion between the film surface and the ink, allowing ordinary ink to replace special ink, thus reducing production costs. The enhanced printing surface of this invention can also be used for surface printing, resulting in better printing quality and effect.

[0004] Based on the above, after coating liquid is applied to the surface of biaxially oriented polyester film using a coating process, a doctor blade is usually used to control the coating thickness and ensure the uniformity of the coating on the film surface. However, during long-term operation of the equipment, when the viscosity of the coating liquid is high, the poor flow performance of the coating liquid causes the coating to remain on the edge of the doctor blade or stagnate between the coating and the doctor blade. The residual liquid not only causes the local coating of the biaxially oriented polyester film to be too thick, which damages the uniformity of the film surface thickness and affects the product performance, but also affects the continuity of film production and the qualification rate of the finished film. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a surface treatment device for biaxially oriented polyester film. This device addresses the issue that during long-term operation, when the coating liquid has a high viscosity, its poor flow properties cause the coating to remain adhered to the edge of the doctor blade or stagnate between the coating agent and the doctor blade. This residual liquid not only leads to excessively thick local coatings on the biaxially oriented polyester film, disrupting the uniformity of the film's surface thickness and affecting product performance, but also impacts the continuity of film production and the yield rate of finished film products.

[0006] The purpose and effectiveness of this biaxially oriented polyester film surface treatment equipment are achieved through the following specific technical means:

[0007] A surface treatment device for biaxially oriented polyester film includes a support frame, a liquid storage bracket, a coating roller, a doctor blade, a cleaning scraper, and an audible and visual alarm. The liquid storage bracket is fixedly connected to the upper side of the inner end of the support frame. A limiting support plate is fixedly connected to the outer side of the bottom end face of the liquid storage bracket. The coating roller is rotatably mounted at the front end of the liquid storage bracket. The doctor blade is elastically mounted behind the coating roller, and collection boxes are provided on the left and right sides of the bottom end face of the doctor blade. The cleaning scraper is slidably mounted on the outer side of the bottom end face of the limiting support plate. A cleaning auxiliary mechanism is provided between the cleaning scraper and the coating roller. The cleaning auxiliary mechanism includes two drive pulleys, which are rotatably mounted on the left and right sides above the coating roller, respectively. A drive belt is wound around the outer side of the two drive pulleys. The drive belt is fixedly connected to the cleaning scraper. The audible and visual alarm is located on the upper side of the rear end of the doctor blade. A wear detection mechanism is provided between the doctor blade and the audible and visual alarm.

[0008] Furthermore, the cleaning auxiliary mechanism also includes: a transmission auxiliary shaft and a drive support shaft. There are two transmission auxiliary shafts, which are respectively vertically rotatably disposed on the outer side of the rear end of the two transmission pulleys; there are two drive support shafts, which are vertically rotatably disposed between the two transmission auxiliary shafts and the coating roller.

[0009] Furthermore, the front and rear ends of the transmission auxiliary shafts on the same side are connected to the drive shaft and transmission pulley by a first bevel gear transmission assembly; the two transmission auxiliary shafts and the left and right ends of the coating roller are provided with a second bevel gear transmission assembly.

[0010] Furthermore, a spray head is provided on the outer side of the bottom end face of the liquid storage bracket; a liquid collection tank with a drain pipe is provided at the inner end of the support frame and at the position aligned with the spray head.

[0011] Furthermore, the wear detection mechanism includes a pressing support, which is elastically disposed on the outside of the audible and visual alarm, and the pressing support is in contact with the pressing switch of the audible and visual alarm.

[0012] Furthermore, the wear detection mechanism also includes: an assisting inclined block and a force-receiving inclined block, wherein the assisting inclined block is fixedly connected to the outer side of the top end face of the scraper; the force-receiving inclined block is fixedly connected to the inner end face of the pressing support; and the contact surfaces of the assisting inclined block and the force-receiving inclined block form a ramp structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In use, this invention utilizes the rotational force of the coating roller to automatically drive the cleaning auxiliary mechanism, which in turn drives the cleaning scraper to rotate and automatically clean the coating liquid adhering to the edge of the scraper or stagnating between the coating roller and the scraper. This ensures the effectiveness and efficiency of the scraper, improves the uniformity of coating the surface of biaxially oriented polyester film, not only improves the continuity of film production, but also further enhances the qualification rate of the finished biaxially oriented polyester film.

[0015] This invention not only extends the service life of the scraper and reduces the frequency of scraper replacement, but also enables automatic detection of the scraper's condition, avoiding the impact of excessive scraper wear on the yield of polyester film products. This further improves the effectiveness of the equipment and the yield of polyester film products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall isometric structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the installation structure of the coating roller and liquid storage support of this utility model.

[0018] Figure 3 This is a schematic diagram of the installation structure of the scraper and liquid storage support of this utility model.

[0019] Figure 4 This is a schematic diagram of the cleaning auxiliary mechanism and coating roller installation structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the installation structure of the transmission auxiliary shaft and transmission pulley of this utility model.

[0021] Figure 6 This is a schematic diagram of the wear detection mechanism and scraper installation structure of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Support frame; 2. Liquid storage bracket; 201. Limiting support plate; 202. Spray head; 3. Coating roller; 4. Scraper; 5. Cleaning scraper; 501. Transmission pulley; 502. Transmission belt; 503. Transmission auxiliary shaft; 504. Drive shaft; 505. First bevel gear transmission assembly; 506. Second bevel gear transmission assembly; 6. Audible and visual alarm; 601. Assisting inclined block; 602. Pressing support column; 603. Force-bearing inclined block. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0025] Example 1:

[0026] As attached Figure 1 To be continued Figure 5 As shown:

[0027] This utility model provides a surface treatment device for biaxially oriented polyester film, including a support frame 1, a liquid storage bracket 2, a coating roller 3, a scraper 4, a cleaning scraper 5, and an audible and visual alarm 6. The liquid storage bracket 2 is fixedly connected to the upper side of the inner end of the support frame 1; a limiting support plate 201 is fixedly connected to the outer side of the bottom end face of the liquid storage bracket 2; the coating roller 3 is rotatably disposed at the front end of the liquid storage bracket 2; the scraper 4 is elastically disposed behind the coating roller 3, and collection boxes are provided on the left and right sides of the bottom end face of the scraper 4; the cleaning scraper 5 is slidably disposed on the outer side of the bottom end face of the limiting support plate 201; a cleaning auxiliary mechanism is provided between the cleaning scraper 5 and the coating roller 3; the cleaning auxiliary mechanism includes two drive pulleys 501, which are rotatably disposed on the left and right sides above the coating roller 3 respectively; a drive belt 502 is wound around the outer side of the two drive pulleys 501; the drive belt 502 is fixedly connected to the cleaning scraper 5; and the audible and visual alarm 6 is disposed on the upper side of the rear end of the scraper 4.

[0028] The cleaning auxiliary mechanism also includes: a transmission auxiliary shaft 503 and a drive support shaft 504. There are two transmission auxiliary shafts 503, which are respectively vertically rotatably arranged on the outer side of the rear end of the two transmission pulleys 501; there are two drive support shafts 504, which are vertically rotatably arranged between the two transmission auxiliary shafts 503 and the coating roller 3.

[0029] Among them, the front and rear ends of the transmission auxiliary shaft 503 on the same side are connected to the drive support shaft 504 and the transmission pulley 501 by the first bevel gear transmission assembly 505; the two transmission auxiliary shafts 503 and the coating roller 3 are provided with the second bevel gear transmission assembly 506 at the left and right ends.

[0030] Among them, a spray head 202 is provided on the outer side of the bottom end face of the liquid storage bracket 2; a liquid collection tank with a drain pipe is provided at the inner end of the support frame 1 and at the position aligned with the spray head 202.

[0031] The specific usage and function of this embodiment are as follows:

[0032] In use, during the process of coating liquid coating the surface of the biaxially oriented polyester film by rotating the coating roller 3, the second bevel gear transmission assembly 506 drives the drive shaft 504 to rotate. During the rotation of the drive shaft 504, the first bevel gear transmission assembly 505 drives the two transmission pulleys 501 to rotate synchronously. When the two transmission pulleys 501 rotate in the same direction, the transmission pulleys 501 drive the cleaning scraper 5 to rotate. When the cleaning scraper 5 rotates, it realizes the automatic cleaning of the coating liquid adhering to the edge of the scraper 4 or stuck between the coating roller 3 and the scraper 4, pushing the residual liquid into the collection box. After the cleaning agent is introduced into the liquid storage bracket 2, the residual coating liquid of the cleaning scraper 5 is automatically cleaned by the spray head 202.

[0033] Example 2:

[0034] As attached Figure 3 To be continued Figure 6 As shown:

[0035] Based on Embodiment 1, a wear detection mechanism is provided between the scraper 4 and the audible and visual alarm 6.

[0036] The wear detection mechanism includes a pressing support 602, which is elastically disposed on the outside of the audible and visual alarm 6, and the pressing support 602 is in contact with the pressing switch of the audible and visual alarm 6.

[0037] The wear detection mechanism also includes: an assisting inclined block 601 and a force-bearing inclined block 603. The assisting inclined block 601 is fixedly connected to the outer side of the top end face of the scraper 4; the force-bearing inclined block 603 is fixedly connected to the inner end face of the pressing support 602; the contact surfaces of the assisting inclined block 601 and the force-bearing inclined block 603 are sloped.

[0038] The specific usage and function of this embodiment are as follows:

[0039] When this utility model is in use, the scraper 4 will automatically slide downwards after being worn down by long-term use, ensuring the uniformity of the coating liquid on the surface of the polyester film. When the scraper 4 is severely worn and slides down to the designated position, the assisting inclined block 601 pushes the force-bearing inclined block 603 and the pressing support 602 to slide towards the sound and light alarm 6. The pressing support 602 squeezes the switch of the sound and light alarm 6, at which time the sound and light alarm 6 sounds an alarm to remind the staff to replace the scraper 4 in time.

[0040] The following points should be noted in this article:

[0041] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0042] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0043] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A surface treatment device for biaxially oriented polyester film, comprising a support frame (1), a liquid storage holder (2), a coating roller (3), a doctor blade (4), a cleaning scraper (5), and an audible and visual alarm (6), characterized in that: The liquid storage bracket (2) is fixedly connected to the upper side of the inner end of the support frame (1); a limiting support plate (201) is fixedly connected to the outer side of the bottom end face of the liquid storage bracket (2); the coating roller (3) is rotatably disposed at the front end of the liquid storage bracket (2); the scraper (4) is elastically disposed behind the coating roller (3), and collection boxes are provided on the left and right sides of the bottom end face of the scraper (4); the cleaning scraper (5) is slidably disposed on the outer side of the bottom end face of the limiting support plate (201); a cleaning space is provided between the cleaning scraper (5) and the coating roller (3). Auxiliary mechanism; the cleaning auxiliary mechanism includes a transmission pulley (501), there are two transmission pulleys (501), the two transmission pulleys (501) are respectively rotatably arranged on the left and right sides above the coating roller (3); a transmission belt (502) is wound around the outside of the two transmission pulleys (501); the transmission belt (502) is fixedly connected to the cleaning scraper (5); the audible and visual alarm (6) is arranged on the upper side of the rear end of the scraper (4); a wear detection mechanism is arranged between the scraper (4) and the audible and visual alarm (6).

2. The biaxially oriented polyester film surface treatment equipment as described in claim 1, characterized in that: The cleaning auxiliary mechanism further includes: a transmission auxiliary shaft (503) and a drive support shaft (504). There are two transmission auxiliary shafts (503), which are respectively vertically rotatably arranged on the outer side of the rear end of the two transmission pulleys (501); there are two drive support shafts (504), which are vertically rotatably arranged between the two transmission auxiliary shafts (503) and the coating roller (3).

3. The biaxially oriented polyester film surface treatment equipment as described in claim 2, characterized in that: The front and rear ends of the transmission auxiliary shaft (503) on the same side are connected to the drive shaft (504) and the transmission pulley (501) by the first bevel gear transmission assembly (505); the two transmission auxiliary shafts (503) and the coating roller (3) are provided with the second bevel gear transmission assembly (506) at the left and right ends.

4. The biaxially oriented polyester film surface treatment equipment as described in claim 1, characterized in that: A spray head (202) is provided on the outer side of the bottom end face of the liquid storage bracket (2); a liquid collection tank with a drain pipe is provided at the inner end of the support frame (1) and at the position aligned with the spray head (202).

5. The biaxially oriented polyester film surface treatment equipment as described in claim 1, characterized in that: The wear detection mechanism includes a pressing support (602), which is elastically disposed on the outside of the audible and visual alarm (6), and the pressing support (602) is in contact with the pressing switch of the audible and visual alarm (6).

6. The biaxially oriented polyester film surface treatment equipment as described in claim 5, characterized in that: The wear detection mechanism further includes: an assisting inclined block (601) and a force-bearing inclined block (603). The assisting inclined block (601) is fixedly connected to the outer side of the top end face of the scraper (4); the force-bearing inclined block (603) is fixedly connected to the inner end face of the pressing support (602); the contact surfaces of the assisting inclined block (601) and the force-bearing inclined block (603) are sloped.

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