Polyurethane film spraying and drying device

Abstract

The utility model provides a polyurethane film spraying and drying device which comprises a machine frame, a spraying device, a drying device and a drying device. The machine frame is provided with an upper box body and a lower box body. An upper guide roller and a spraying assembly are arranged in the upper box body, and a feeding device is arranged outside the upper box body and conveys coating to the spraying assembly. The lower box body is an oven, and lower guide rollers are arranged in the lower box body; the machine frame is further provided with a main recovery tank communicated with the upper box body, a fixing shaft is arranged in the main recovery tank, and a scraper pointing to the polyurethane film is arranged on the fixing shaft. According to the utility model, the scraper and the main recovery tank are designed on the rack, a polyurethane film reaches a slicking position after being sprayed, and the coating is slicked by the scraper, so that the thickness of the coating is adjusted, the thickness of the coating is controllable, the precision can reach + / -0.2 mm, and the paint scraped in the slicking process can be gathered in the main recovery tank and is not wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, in particular to a polyurethane film spraying and drying device. Background Art

[0002] Polyurethane film is an environmentally friendly material, widely used in clothing fabrics, medical and health, leather and other fields. Its preparation process mainly includes raw material synthesis, extrusion molding, cooling and pulling, and stretching and winding. In some cases, if the polyurethane film needs to have higher wear resistance, corrosion resistance, UV resistance and other properties, or needs to be bonded with other materials, it will be improved by coating. After the film is stretched, a coating device is used to coat one or both sides of the film, and then the film is dried and rolled up.

[0003] There are three ways to apply polyurethane film: rolling, spraying and scraping. Among them, spraying is the most efficient, which can shorten the construction time and the quality of the sprayed surface is more uniform. The disadvantages of spraying are: when applying the film, the thickness of the coating is difficult to control; during the spraying process, the paint is easy to spread to other places, causing waste.

[0004] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0005] The utility model provides a polyurethane film spraying and drying device to solve the above problems.

[0006] A technical solution adopted by the utility model is: to provide a polyurethane film spray drying device, comprising: a frame, the frame having an upper box body and a lower box body;

[0007] The upper box body is provided with an upper guide roller and a spraying assembly, and the outside is provided with a feeding device, and the feeding device delivers the paint to the spraying assembly;

[0008] The lower box is an oven, and a lower guide roller is arranged inside. The polyurethane film enters the upper box after being stretched in the previous process, passes through the upper guide roller and the lower guide roller in sequence, and goes to the winding device after being dried;

[0009] The frame is also provided with a main recovery tank which is connected with the upper box body. A fixed shaft is provided in the main recovery tank. A scraper pointing to the polyurethane film is provided on the fixed shaft. When the polyurethane film passes by, the scraper flattens the uncured coating so as to better control the coating thickness. The scraped paint is gathered in the main recovery tank to avoid waste.

[0010] Furthermore, the spraying assembly is arranged in the upper box body through a suspension, and the suspension is detachably connected to the top of the upper box body. By adjusting the position of the suspension left and right, the distance between the spraying position and the scraping position can be adjusted to adapt to the curing time of different coatings and ensure that the coating is in a suitable state when in the scraping position.

[0011] Furthermore, a pair of auxiliary recovery grooves are provided in the upper box body, which are located on both sides of the spraying position and are detachably connected to the inner side surface of the upper box body. During spraying, the paint spread on both sides is gathered in the auxiliary recovery grooves.

[0012] Furthermore, the frame is also provided with a recovery device for conveying the paint in the main recovery tank back to the feeding device, so as to recycle the paint scraped off during the scraping process.

[0013] Furthermore, the scraper is detachably connected to the fixed shaft, and the size of the film and the required thickness of the coating can be adapted by replacing scrapers of different widths and lengths.

[0014] Furthermore, at the position where the scraper points, the polyurethane film contacts the upper guide roller, so the scraping will be more stable and easier to control the accuracy.

[0015] Furthermore, the scraper is provided with a plurality of guide holes, so that the scraped paint can be collected into the main recovery tank more quickly.

[0016] The beneficial effects of the polyurethane film spraying and drying device of the utility model are:

[0017] 1. A scraper and a main recovery tank are designed on the frame. After the polyurethane film is sprayed, it reaches the scraping position, and the scraper is used to scrape the coating to adjust the coating thickness. The coating thickness is controllable with an accuracy of ±0.2mm. In addition, the paint scraped off during the scraping process can be gathered in the main recovery tank without waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a polyurethane film spraying and drying device according to the first embodiment of the utility model;

[0019] The markings of the components in the accompanying drawings are as follows: 1. upper box body, 2. lower box body, 3. main recovery tank, 4. polyurethane film, 11. upper guide roller, 12. spraying assembly, 13. suspension, 14. auxiliary recovery tank, 21. lower guide roller, 31. fixed shaft, 32. scraper. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] See also Figure 1 The first embodiment of the utility model provides a polyurethane film 4 spray drying device, comprising: a frame, the frame having an upper box body 1 and a lower box body 2, the polyurethane film 4 is sprayed in the upper box body 1 and dried in the lower box body 2;

[0023] An upper guide roller 11 and a spraying assembly 12 are arranged inside the upper box 1, and a feeding device is arranged outside. The feeding device delivers the paint to the spraying assembly 12. After the polyurethane film 4 enters the upper box 1, it moves to the right in the horizontal direction, passes through the upper guide roller 11, and folds to the lower box 2.

[0024] The spray assembly 12 includes a feed pipe and a group of spray guns. The feed pipe connects the feed device and the spray guns. The spray guns are evenly distributed in the vertical feed direction to spray the polyurethane film 4 entering the upper box 1. The type of the spray gun and the flow rate during spraying can be adjusted to meet different spraying requirements.

[0025] The lower box 2 is a drying oven, and a lower guide roller 21 is arranged inside the lower box 2. After the polyurethane film 4 enters the lower box 2, it is guided by the lower guide roller 21 and moves to the left in the horizontal direction, and then goes to the winding device after drying.

[0026] The frame is also provided with a main recovery tank 3, which is connected with the upper box body 1. A fixed shaft 31 is provided in the main recovery tank 3. A scraper 32 pointing to the polyurethane film 4 is provided on the fixed shaft 31. The polyurethane film 4 is in contact with the upper guide roller 11 at the position pointed by the scraper 32. When the polyurethane film 4 passes by, the scraper 32 scrapes the uncured coating flat, so as to better control the coating thickness. The scraped coating will be gathered in the main recovery tank 3 to avoid waste.

[0027] The scraper 32 is detachably connected to the fixed shaft 31. By replacing the scraper 32 with different widths and lengths, the size of the film and the required thickness of the coating can be adapted. When the polyurethane film 4 is sprayed, the spraying thickness will be slightly larger than the required thickness of the coating. After being scraped by the scraper 32, the coating thickness can be controlled with an accuracy of up to ±0.2mm.

[0028] Specifically, in addition to replacing the scraper 32, the position where the end of the scraper 32 contacts the coating can be adjusted by adjusting the angle of the scraper 32 to adapt to the required thickness of the coating.

[0029] Specifically, the scraper 32 has a plurality of guide holes, and the scraped paint will leak out from the guide holes and flow into the main recovery tank 3 more quickly. The guide holes are long and have a section extending vertically downward at the end to guide the paint. Baffles are also provided on the left and right sides of the scraper 32 and on the side close to the fixed shaft 31 to prevent the paint from covering the fixed shaft 31.

[0030] In order to better recycle the paint, there are also the following settings:

[0031] 1. A recovery device is also provided on the frame to transport the paint in the main recovery tank 3 back to the feeding device to recycle the paint scraped off during the scraping process;

[0032] The recovery device includes a recovery pipe, one end of which is connected to the bottom of the main recovery tank 3, and the other end is connected to the feeding device. A return pump is also provided on the recovery pipe to draw the paint gathered in the main recovery tank 3 back to the feeding device. The return pump is adjusted according to the actual scraping condition of the polyurethane film 4 so that the uncured paint in the main recovery tank 3 can be returned to the feeding device in time.

[0033] 2. A pair of auxiliary recovery tanks 14 are also provided in the upper box body 1, located on both sides of the spraying position. During spraying, the spray guns located on both sides will spread the paint outside the polyurethane film 4, and the spread paint will be gathered in the auxiliary recovery tank 14;

[0034] The auxiliary recovery tank 14 is installed on the inner side of the upper box body 1 and can be removed for cleaning after a period of time.

[0035] When spraying the polyurethane film 4, different coatings have different fluidity. To ensure the effect of scraping, the coating needs to be in a suitable state when it is scraped, neither solidified nor too fluid. The coating state can be adjusted by adjusting the distance between the spraying position and the scraping position:

[0036] 1. The spraying assembly 12 is arranged in the upper box body 1 through the suspension 13, and the suspension 13 is detachably connected to the top of the upper box body 1;

[0037] The part of the feed pipe located in the upper box body 1 is clamped on the suspension 13, and the suspension 13 is threadedly connected to the top of the upper box body 1, and the position can be adjusted left and right. By adjusting the position of the suspension 13 left and right, the distance between the spraying position and the scraping position can be adjusted.

[0038] 2. The auxiliary recovery tank 14 is also connected to the upper box body 1 through threads. When the spraying position changes, the position of the auxiliary recovery tank 14 is adjusted to adapt to it.

[0039] In the second embodiment of the utility model, a suspension 13 adjustment groove is provided on the top of the upper box body 1, and the suspension 13 can slide left and right in the suspension 13 adjustment groove to adjust the position. Correspondingly, a secondary recovery adjustment groove is provided on the inner side of the upper box body 1, and the secondary recovery groove 14 can slide left and right therein to adjust the position to adapt to the spraying position. The rest of the design is the same as the first embodiment.

[0040] The beneficial effects of the polyurethane film spraying and drying device of the utility model are:

[0041] 1. A scraper and a main recovery tank are designed on the frame. After the polyurethane film is sprayed, it reaches the scraping position, and the scraper is used to scrape the coating to adjust the coating thickness. The coating thickness is controllable with an accuracy of ±0.2mm. In addition, the paint scraped off during the scraping process can be gathered in the main recovery tank without waste.

[0042] 2. Set the material guide hole on the scraper to collect and recycle the residual material as soon as possible to avoid solidification. The size of the film and the required thickness of the coating can be adapted by replacing the scraper or rotating the scraper;

[0043] 3. An adjustable suspension and auxiliary recovery tank are set up to adjust the distance between the spraying position and the scraping position so that the coating is in a suitable state when it is scraped. The coating is flat after scraping, and there will be no surface crusting, wrinkling, etc. after drying.

[0044] 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 spraying and drying device, characterized in that: include: A frame, wherein the frame has an upper box body and a lower box body; The upper box body is provided with an upper guide roller and a spraying assembly, and the outside is provided with a feeding device, and the feeding device delivers the paint to the spraying assembly; The lower box body is a drying oven, and a lower guide roller is arranged inside; The frame is also provided with a main recovery tank which is communicated with the upper box body. A fixed shaft is provided in the main recovery tank, and a scraper pointing to the polyurethane film is provided on the fixed shaft.

2. A polyurethane film spraying and drying device according to claim 1, characterized in that: The spraying assembly is arranged in the upper box body through a suspension, and the suspension is detachably connected to the top of the upper box body. By adjusting the position of the suspension left and right, the distance between the spraying position and the scraping position can be adjusted.

3. A polyurethane film spraying and drying device according to claim 2, characterized in that: The upper box body is also provided with a pair of auxiliary recovery grooves, which are located on both sides of the spraying position and are detachably connected to the inner side surface of the upper box body.

4. A polyurethane film spraying and drying device according to any one of claims 1 to 3, characterized in that: The frame is also provided with a recovery device for conveying the coating in the main recovery tank back to the feeding device.

5. A polyurethane film spraying and drying device according to claim 4, characterized in that: The scraper is detachably connected to the fixed shaft.

6. A polyurethane film spraying and drying device according to claim 5, characterized in that: At the position where the scraper is pointed, the polyurethane film is in contact with the upper guide roller.

7. The polyurethane film spraying and drying device according to claim 6, characterized in that: The scraper is provided with a plurality of material guiding holes.

8. A polyurethane film spraying and drying device according to any one of claims 1 to 3, characterized in that: The scraper is detachably connected to the fixed shaft, and the polyurethane film contacts the upper guide roller at the position where the scraper points.

9. The polyurethane film spraying and drying device according to claim 8, characterized in that: The scraper is provided with a plurality of material guiding holes.

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