Polyurethane film coating machine

Abstract

The utility model provides a polyurethane film coating machine which comprises a case, a plurality of guide rollers, a plurality of conveying rollers, a plurality of conveying rollers, a plurality of conveying rollers and a plurality of conveying rollers, a spraying assembly, a first thickness measuring mechanism, a slicking assembly and a second thickness measuring mechanism are sequentially arranged in the machine box and located above the guide roller. The first thickness measuring mechanism and the second thickness measuring mechanism each comprise a laser coaxial displacement meter, a first guide rail and a second guide rail, the first guide rails are fixedly arranged on the side wall of the machine box in the polyurethane film conveying direction, the second guide rails are arranged perpendicular to the first guide rails, and the ends of the second guide rails are arranged on the first guide rails in a sliding mode. And the laser coaxial displacement meter is arranged on the second guide rail in a sliding manner. The two thickness measuring mechanisms are arranged and used for detecting the thickness of the polyurethane film after spraying and slicking, intermittent thickness detection of the continuously produced polyurethane film is achieved through the laser coaxial displacement meter, and when the thickness of the polyurethane film deviates, the fault position can be rapidly determined.

Description

Technical Field

[0001] The utility model relates to the technical field of film coating machines, in particular to a polyurethane film coating machine. Background Art

[0002] During the production process, polyurethane film may have uneven film thickness and fail to meet production requirements due to various reasons, such as extrusion failure, coating nozzle failure, improper scraper setting, etc. It is necessary to conduct certain tests on the thickness of the polyurethane film during the production process. The traditional method is to manually test the thickness of the finished product to ensure that it meets the requirements. The disadvantage is that it is time-consuming, labor-intensive and inaccurate. The existing technology sets an ultrasonic thickness gauge that can move back and forth. When the polyurethane film on the conveyor belt reaches the position of the ultrasonic thickness gauge, the conveyor belt stops and the ultrasonic thickness gauge measures the thickness of the film. This solution can measure the films one by one and obtain the thickness of each film more quickly and accurately. Its disadvantage is that it cannot measure the continuously produced polyurethane film.

[0003] In the continuous production process of polyurethane film, it is necessary to detect its thickness more efficiently, and when the thickness is abnormal, it is necessary to determine the fault location more quickly. Therefore, it is necessary to improve the existing technology. Utility Model Content

[0004] The utility model provides a polyurethane film coating machine to solve the above problems.

[0005] A technical solution adopted by the utility model is to provide a polyurethane film coating machine, comprising: a machine box, in which a plurality of guide rollers are arranged in the horizontal direction, and the polyurethane film is transmitted from left to right;

[0006] The machine box is provided with a spraying assembly, a first thickness measuring mechanism, a scraping assembly and a second thickness measuring mechanism in sequence above the guide roller, which respectively spray, measure thickness, scrape and measure thickness of the polyurethane film;

[0007] The first thickness measuring mechanism and the second thickness measuring mechanism both include a laser coaxial displacement meter, a first guide rail and a second guide rail, wherein the first guide rail is fixedly arranged on the side wall of the chassis along the transmission direction of the polyurethane film, the second guide rail is arranged perpendicular to the first guide rail, and its end is slidably arranged on the first guide rail, and the laser coaxial displacement meter is slidably arranged on the second guide rail and can move back and forth in the width direction of the polyurethane film;

[0008] When working, the second guide rail moves along the transmission direction of the polyurethane film and keeps the same speed as the film. At the same time, the laser coaxial displacement meter moves perpendicular to the transmission direction of the polyurethane film and continuously measures its thickness to complete the thickness detection over the width range. After that, the second guide rail and the laser coaxial displacement meter are reset. In a reciprocating cycle, the laser coaxial displacement meter can intermittently detect the thickness of the continuously produced polyurethane film. When the thickness of the polyurethane film deviates, the fault location can be quickly determined.

[0009] Furthermore, one of the guide rollers is located directly below the scraping assembly to support the scraping position.

[0010] Furthermore, the scraping assembly includes a driving cylinder and a scraper, the driving cylinder is connected to the top of the chassis through a connecting piece, and the scraper is arranged at the driving end of the driving cylinder, and the distance between the scraper and the polyurethane film can be adjusted.

[0011] Furthermore, an auxiliary roller is provided on the side of the lower end of the scraping component, and the lower end of the auxiliary roller contacts the surface of the polyurethane film to ensure that the polyurethane film stably enters the scraping position.

[0012] Furthermore, the chassis is composed of four boxes, so that the spraying component, the first thickness measuring mechanism, the scraping component and the second thickness measuring mechanism are respectively located in one box.

[0013] The beneficial effects of the polyurethane film coating machine of the utility model are:

[0014] 1. Two thickness measuring mechanisms are set up to detect the thickness of the polyurethane film after spraying and after scraping. The laser coaxial displacement meter is used to realize the intermittent thickness detection of the continuously produced polyurethane film. When the thickness of the polyurethane film deviates, the fault location can be quickly determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a polyurethane film coating machine according to the first embodiment of the utility model;

[0016] Figure 2 This is a top view of the thickness measuring mechanism of the first embodiment of the utility model;

[0017] The components in the accompanying drawings are marked as follows: 1. Guide roller, 2. Spraying assembly, 3. First thickness measuring mechanism, 4. Scraping assembly, 5. Second thickness measuring mechanism, 6. Polyurethane film, 31. First guide rail, 32. Second guide rail, 33. Laser coaxial displacement meter, 41. Scraper, 42. Auxiliary roller. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] See also Figure 1 and Figure 2 , the first embodiment of the utility model provides a polyurethane film 6 coating machine, comprising: a chassis, a plurality of guide rollers 1 are arranged in the chassis along the horizontal direction, and the polyurethane film 6 is transmitted from left to right;

[0021] A spraying assembly 2, a first thickness measuring mechanism 3, a scraping assembly 4 and a second thickness measuring mechanism 5 are sequentially arranged above the guide roller 1 in the machine box, and are used to spray, measure thickness, scrape and measure thickness of the polyurethane film 6 respectively;

[0022] The spray assembly 2 includes a row of spray heads, the spray range covers the width of the polyurethane film 6, and the spray heads are connected to an external feeding device through a pipeline;

[0023] The scraping assembly 4 includes a driving cylinder and a scraper 41. The driving cylinder is connected to the top of the chassis through a connecting piece. The scraper 41 is arranged at the driving end of the driving cylinder. The distance between the scraper 41 and the polyurethane film 6 can be adjusted.

[0024] The first thickness measuring mechanism 3 and the second thickness measuring mechanism 5 both include a laser coaxial displacement meter 33, a first guide rail 31 and a second guide rail 32. The first guide rail 31 is fixedly arranged on the side wall of the chassis along the transmission direction of the polyurethane film 6. The second guide rail 32 is arranged perpendicular to the first guide rail 31, and its end is slidably arranged on the first guide rail 31. The laser coaxial displacement meter 33 is slidably arranged on the second guide rail 32 and can move back and forth in the width direction of the polyurethane film 6.

[0025] During operation, the second guide rail 32 moves along the transmission direction of the polyurethane film 6 and maintains the same speed as the film. At the same time, the laser coaxial displacement meter 33 moves perpendicular to the transmission direction of the polyurethane film 6 and continuously measures its thickness to complete the thickness detection over a wide range. The detection data will be transmitted to the corresponding control system in real time. After that, the second guide rail 32 and the laser coaxial displacement meter 33 are reset. This cycle is repeated, and the laser coaxial displacement meter 33 can intermittently detect the thickness of the continuously produced polyurethane film 6.

[0026] All components and mechanisms in the chassis are centrally controlled by the control system. When the control system receives abnormal test data, it will alert the test personnel and give a possible fault judgment.

[0027] Specifically, when the detection data of the first thickness measuring mechanism 3 exceeds the allowable error range, it warns of a coating nozzle failure. The specific location of the faulty nozzle can also be determined based on the change in thickness data within the width range. When the detection data of the second thickness measuring mechanism 5 exceeds the allowable error range, it warns of a scraper blade 41 failure.

[0028] Specifically, the scraping assembly 4 and the second thickness measuring mechanism 5 can also cooperate in the scraping test phase to achieve a more accurate scraping effect by adjusting the height position of the scraper 41 and continuously measuring the thickness data.

[0029] The above scheme has achieved the thickness measurement and fault troubleshooting of the continuously produced polyurethane film 6. If the fault is to be repaired online, some adjustments need to be made to the previous process:

[0030] Usually, an extruder, a traction machine, etc. are arranged in front of the coating machine, and an oven and a winder are arranged behind the coating machine. Now, a film storage device is added behind the extruder. When the coating machine fails, the traction machine and subsequent equipment are shut down, and the film prepared by the extruder is stored in the film storage device. At this time, the coating machine can be repaired online, and the polyurethane film 6 in the abnormal range can be marked or cut, which greatly reduces the scrap rate.

[0031] To ensure the stability of the scraped area, the following settings are available:

[0032] One of the guide rollers 1 is located directly below the scraper 41 and is used to support the scraping position;

[0033] An auxiliary roller 42 is also provided on the side of the lower end of the scraping component 4, and the lower end of the auxiliary roller 42 contacts the surface of the polyurethane film 6 to ensure that the polyurethane film 6 stably enters the scraping position;

[0034] The position of the auxiliary roller 42 can be fine-tuned up and down to adapt to different film thicknesses.

[0035] In other embodiments of the present invention, the various components and mechanisms may also be separated:

[0036] The chassis is composed of four boxes, so that the spraying component 2, the first thickness measuring mechanism 3, the scraping component 4 and the second thickness measuring mechanism 5 are respectively located in one box, and each box has its own inspection port for easy maintenance.

[0037] The beneficial effects of the polyurethane film coating machine of the utility model are:

[0038] 1. Two thickness measuring mechanisms are set up to detect the thickness of the polyurethane film after spraying and after scraping. The laser coaxial displacement meter is used to realize the intermittent thickness detection of the continuously produced polyurethane film. When the thickness of the polyurethane film deviates, the fault location can be quickly determined;

[0039] 2. The scraper driven by the cylinder can adapt to different scraping thicknesses. The scraping assembly and the second thickness measuring mechanism can also better test the scraping position to make the product thickness more accurate;

[0040] 3. The setting of guide roller and auxiliary roller makes the scraping stable, and the separation setting of the chassis is conducive to maintenance.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A polyurethane film coating machine, characterized in that, It comprises: a chassis, wherein a plurality of guide rollers are arranged in the horizontal direction inside the chassis; The machine box is provided with a spraying assembly, a first thickness measuring mechanism, a scraping assembly and a second thickness measuring mechanism in sequence above the guide roller; The first thickness measuring mechanism and the second thickness measuring mechanism both include a laser coaxial displacement meter, a first guide rail and a second guide rail. The first guide rail is fixedly arranged on the side wall of the chassis along the transmission direction of the polyurethane film, the second guide rail is arranged perpendicular to the first guide rail, and its end is slidably arranged on the first guide rail. The laser coaxial displacement meter is slidably arranged on the second guide rail.

2. A polyurethane film coating machine according to claim 1, characterized in that: One of the guide rollers is located just below the scraping assembly.

3. A polyurethane film coating machine according to claim 2, characterized in that: The scraping assembly comprises a driving cylinder and a scraper. The driving cylinder is connected to the top of the chassis through a connecting piece, and the scraper is arranged at the driving end of the driving cylinder.

4. A polyurethane film coating machine according to claim 3, characterized in that: An auxiliary roller is also arranged on the side of the lower end of the scraping component, and the lower end of the auxiliary roller contacts the surface of the polyurethane film.

5. A polyurethane film coating machine according to any one of claims 1 to 4, characterized in that: The chassis is composed of four boxes, so that the spraying component, the first thickness measuring mechanism, the scraping component and the second thickness measuring mechanism are respectively located in one box.

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