Blade coater for jean fabric production

Abstract

The utility model relates to a blade coater for jean fabric production. The device comprises a rack, a coating table, a conveying roller assembly and a scraper coating assembly, the scraper coating assembly comprises a first scraper blade, a second scraper blade and a material injection part, the minimum distance between the first scraper blade and the coating table is larger than the minimum distance between the second scraper blade and the coating table, and denim fabric sequentially passes through the first scraper blade and the second scraper blade; a plurality of material injection cavities are distributed in the material injection part in the length direction of the first scraping plate, a flat coating recycling seam is formed between the first scraping plate and the second scraping plate, end covers for covering the coating recycling seam are fixed to the two ends of the two scraping plates, and a negative pressure suction device is further arranged on the upper side of the coating recycling seam. By arranging a plurality of uniformly distributed material injection cavities, a first scraping plate and a second scraping plate, the coating is uniformly distributed in three times in the whole blade coating process, so that the distribution uniformity is improved, and the coating consistency is ensured.

Description

Technical Field

[0001] The utility model relates to fabric coating equipment, in particular to a scraper coating machine for producing denim fabrics. Background Art

[0002] Fabric coating is a common fabric processing technology, which changes the performance of fabrics, improves quality or increases value by applying one or more layers of specific coatings on the surface of fabrics. This process is widely used in the production of functional fabrics such as waterproof, oil-proof, anti-fouling, and UV-proof. There are many specific coating methods, such as brushing, rolling, spraying, and scraping. When coating, pay attention to controlling parameters such as coating concentration, coating speed, and coating thickness to obtain a uniform coating. Among them, compared with other coating processes, the scraper coating process has the following advantages: high flatness of the coating surface, high coating utilization rate, wide application range, and high production efficiency.

[0003] There are obvious differences between denim fabrics and ordinary fabrics in terms of raw material composition, organizational structure, weaving method and finishing process. These differences give denim fabrics a unique appearance and feel, making them suitable for making various garments and accessories. When denim fabrics are subjected to the scraper coating process, due to the obvious texture and thick fabric characteristics of the fabric, there are many internal gaps in the fabric, and the fluidity of the coating on the fabric is poor, which easily leads to uneven scraping. Summary of the invention

[0004] The utility model provides a scraper coating machine for producing denim fabrics, which solves the problem in the prior art that uneven coating is easily generated when coating denim fabrics using a scraper coating process.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: A scraper coating machine for producing denim fabrics, comprising a frame, a coating table horizontally arranged on the frame, a conveying roller assembly for driving the denim fabric to be continuously conveyed from the upper side of the coating table, and a scraper coating assembly arranged on the upper side of the coating table, wherein the frame is provided with a mounting frame for fixing the scraper coating assembly, characterized in that the scraper coating assembly comprises a first scraper, a second scraper located at the rear side of the first scraper, and a material injection portion fixed to the front side of the first scraper, and the length of the two scrapers is The coating table is horizontal, the angle between the front side surfaces of the two scrapers and the upper surface of the coating table is an acute angle, the minimum distance between the first scraper and the coating table is greater than the minimum distance between the second scraper and the coating table, and the denim fabric passes through the first scraper and the second scraper in sequence; a plurality of injection cavities are distributed on the injection portion along the length direction of the first scraper, a flat paint recovery gap is formed between the first scraper and the second scraper, end covers covering the paint recovery gap are fixed at both ends of the two scrapers, and a negative pressure absorber is also provided on the upper side of the paint recovery gap.

[0006] The injection chamber on the utility model is connected with the paint conveying device. When the utility model is running, the paint conveying device keeps conveying the paint at a uniform speed, and the conveying roller assembly also starts to run, driving the denim fabric to be loaded, and the negative pressure absorber starts to suck air synchronously. After the paint passes through the injection chamber, it drips on the fabric in a state of multiple streams, and the fabric moves to the first scraper with the paint. The first scraper can perform the first scraping of the paint on the fabric, and then the fabric and the paint thereon enter the bottom of the paint recovery slit. At this time, the thickness of the paint on the fabric is slightly thicker than the scraping edge of the second scraper, so these paints will be scraped for the second time by the second scraper, so that the paint is evenly applied to the fabric; at the same time, in order to ensure that the input amount of the paint is sufficient, the actual input amount will be slightly greater than the actual consumption, so the front area of ​​the second scraper corresponds to the amount of accumulated paint in the paint recovery slit, which will continue to increase, and these paints will gradually overflow from the upper opening of the paint recovery slit, and the overflowed paint will be sucked away by the negative pressure absorber to avoid overflowing to the outside.

[0007] Furthermore, the upper opening of the injection cavity is a circular hole, the lower opening is a strip, and the inner cavity of the injection cavity is a smooth transition setting. This design allows the width of the paint in contact with the fabric to be elongated when the paint is output from the injection cavity, thereby increasing the uniformity of the overall scraping.

[0008] Furthermore, a plurality of partition blocks are arranged in an array along the length direction of the paint recovery slot, and the partition blocks separate a plurality of overflow ports from the upper opening of the paint recovery slot. This design is to control the paint from overflowing from a fixed point, so as to facilitate the recovery of the negative pressure absorber.

[0009] Furthermore, the mounting frame includes a support beam and two telescopic rods, the upper end of the first scraper is horizontally rotatably connected to the support beam, the telescopic rods are symmetrically arranged on the outside of the two end caps, the upper end of the telescopic rods is hinged to the support beam, and the lower end of the telescopic rods is hinged to the end caps; the telescopic rods include a first rod body, a second rod body and a rotating head, the two rod bodies are respectively screwed to the upper and lower ends of the rotating head, and the screw threads are opposite. By rotating the rotating head forward and backward, the overall length of the telescopic rod can be fine-tuned, thereby driving the scraper coating assembly to flip up and down as a whole to adjust the gap with the fabric.

[0010] Therefore, compared with the prior art, the utility model has the following characteristics: 1. By setting a number of evenly distributed injection chambers, a first scraper and a second scraper, the paint is evenly distributed three times during the entire scraping process to increase the uniformity of distribution and ensure the consistency of coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 is a schematic diagram of the structure of a doctor blade coating assembly;

[0012] Attached Figure 2 It is a structural schematic diagram of the utility model except the frame;

[0013] Attached Figure 3 It is a working schematic diagram of the scraper coating component in the coating state;

[0014] Attached Figure 4 is a side view of a doctor blade coating assembly;

[0015] Attached Figure 5 Yes Figure 4 AA section view;

[0016] Attached Figure 6 Yes Figure 4 BB cross-sectional view. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] Example 1: See Figure 1 , Figure 2 and Figure 3A scraper coating machine for producing denim fabrics comprises a frame, a coating table 100 horizontally arranged on the frame, a conveying roller assembly 200 for driving the denim fabric 10 to be continuously conveyed from the upper side of the coating table, and a scraper coating assembly 300 arranged on the upper side of the coating table. A mounting frame 400 for fixing the scraper coating assembly is provided on the frame. The scraper coating assembly comprises a first scraper 310, a second scraper 320 located at the rear side of the first scraper, and a material injection portion 330 fixed at the front side of the first scraper. The length direction of the two scrapers is horizontal, and the front side surfaces of the two scrapers are in contact with the coating surface. The angle between the upper surfaces of the coating table is an acute angle, and the angle of the acute angle is between 20 and 45 degrees. The minimum distance between the first scraper and the coating table is greater than the minimum distance between the second scraper and the coating table. The denim fabric passes through the first scraper and the second scraper in sequence. A plurality of injection cavities 340 are distributed along the length direction of the first scraper on the injection part. A flat paint recovery seam 350 is formed between the first scraper and the second scraper. End covers 360 covering the paint recovery seam are fixed at both ends of the two scrapers. A negative pressure absorber 370 is also provided on the upper side of the paint recovery seam.

[0020] The injection chamber in this embodiment is connected with the paint conveying device. When this embodiment is running, the paint conveying device keeps conveying the paint at a uniform speed, and the conveying roller assembly also starts to run, driving the denim fabric to be loaded, and the negative pressure absorber starts to suck air synchronously. After the paint passes through the injection chamber, it drips on the fabric in a state of multiple streams. The fabric moves toward the first scraper with the paint. The first scraper can perform the first scraping of the paint on the fabric, and then the fabric and the paint thereon enter the bottom of the paint recovery slit. At this time, the thickness of the paint on the fabric is slightly thicker than the scraping edge of the second scraper, so these paints will be scraped twice by the second scraper, so that the paint is evenly applied to the fabric; at the same time, in order to ensure that the input amount of the paint is sufficient, the actual input amount will be slightly greater than the actual consumption, so the front area of ​​the second scraper corresponds to the amount of accumulated paint in the paint recovery slit, which will continue to increase, and these paints will gradually overflow from the upper opening of the paint recovery slit, and the overflowed paint will be sucked away by the negative pressure absorber to avoid overflowing to the outside.

[0021] See Figure 5 The spacing between adjacent injection chambers is generally between 5 and 10 centimeters. The upper opening of the injection chamber is a round hole, and the lower opening is a long strip with a specific length of 3 to 6 centimeters. The inner cavity of the injection chamber is a smooth transition setting. This design allows the width of the paint in contact with the fabric to be lengthened when it is output from the injection chamber, increasing the uniformity of the overall scraping.

[0022] See Figure 5 A docking joint 380 is provided at the upper opening of the injection cavity for docking with a hose of a paint delivery device.

[0023] See Figure 6A plurality of partition blocks 390 are arranged in an array along the length direction of the paint recovery slot, and the partition blocks separate the upper opening of the paint recovery slot into a plurality of overflow ports 391. This design is to control the paint from overflowing from a fixed point, so as to facilitate the recovery of the negative pressure absorber.

[0024] See Figure 1 The negative pressure absorber includes a hollow main pipe 371 connected to the negative pressure device and a plurality of suction pipes 372 extending from the hollow main pipe, wherein the suction pipes extend to the overflow port.

[0025] See Figure 2 The mounting frame includes a support beam 410 and two telescopic rods 420. The upper end of the first scraper is horizontally rotatably connected to the support beam. The telescopic rods are symmetrically arranged on the outside of the two end covers. The upper end of the telescopic rod is hinged to the support beam, and the lower end of the telescopic rod is hinged to the end cover. The telescopic rod includes a first rod body 421, a second rod body 422 and a rotating head 423. The two rod bodies are respectively screwed to the upper and lower ends of the rotating head, and the screw threads are opposite. By rotating the rotating head forward and backward, the overall length of the telescopic rod can be fine-tuned, thereby driving the scraper coating assembly to flip up and down as a whole to adjust the gap with the fabric.

[0026] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the claims.

Claims

1. A scraper coating machine for producing denim fabrics, comprising a frame, a coating table horizontally arranged on the frame, a conveying roller assembly for driving the denim fabric to be continuously conveyed from the upper side of the coating table, and a scraper coating assembly arranged on the upper side of the coating table, wherein a mounting frame for fixing the scraper coating assembly is provided on the frame, and the characteristics are: The scraper coating assembly includes a first scraper, a second scraper located at the rear side of the first scraper, and an injection part fixed to the front side of the first scraper. The length directions of the two scrapers are horizontal, and the angle between the front side surfaces of the two scrapers and the upper surface of the coating table is an acute angle. The minimum distance between the first scraper and the coating table is greater than the minimum distance between the second scraper and the coating table. The denim fabric passes through the first scraper and the second scraper in sequence; a plurality of injection cavities are distributed on the injection part along the length direction of the first scraper, a flat paint recovery seam is formed between the first scraper and the second scraper, and end covers covering the paint recovery seam are fixed at both ends of the two scrapers. A negative pressure absorber is also provided on the upper side of the paint recovery seam.

2. The scraper coating machine for producing denim fabric according to claim 1, characterized in that: The upper opening of the injection cavity is in the shape of a circular hole, the lower opening thereof is in the shape of an elongated strip, and the inner cavity of the injection cavity is in the shape of a smooth transition.

3. The scraper coating machine for producing denim fabric according to claim 2, characterized in that: A butt joint is arranged at the upper opening of the injection cavity.

4. The scraper coating machine for producing denim fabric according to claim 1, characterized in that: A plurality of partition blocks are arranged in an array along the length direction of the paint recovery slot, and the partition blocks separate a plurality of overflow ports from the upper opening of the paint recovery slot.

5. The scraper coating machine for producing denim fabric according to claim 4, characterized in that: The negative pressure suction device comprises a hollow main pipe connected to the negative pressure device and a plurality of suction pipes extending from the hollow main pipe, wherein the suction pipes extend to the overflow port.

6. The scraper coating machine for producing denim fabric according to claim 1, characterized in that: The mounting frame includes a support beam and two telescopic rods. The upper end of the first scraper is horizontally rotatably connected to the support beam. The telescopic rods are symmetrically arranged on the outsides of the two end covers. The upper ends of the telescopic rods are hinged to the support beam, and the lower ends of the telescopic rods are hinged to the end covers.

7. The scraper coating machine for producing denim fabric according to claim 6, characterized in that: The telescopic rod comprises a first rod body, a second rod body and a rotating head. The two rod bodies are respectively screwed to the upper and lower ends of the rotating head, and the screw threads are opposite.

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