A pretreatment device and method for longitudinal creases in fabric

Abstract

This invention belongs to the field of textile inspection technology and discloses a pretreatment device and method for longitudinal creases in fabric. The pretreatment device includes a heater, a plate with an inner cavity, a nozzle, a lifting device, a first frame, and a second frame. The heater is rotatably connected to the first frame at both ends. The first frame is connected to the lifting device. A roller is fitted around the outside of the heater and can move axially along the heater. The plate is located below the heater and is fixedly connected to the second frame. The inner cavity of the plate has an air cavity and a water cavity. The nozzle communicates with the water cavity and is movably connected to a slide rail on the outer wall of the plate.

Description

Technical Field

[0001] This invention belongs to the field of textile inspection technology, specifically, it relates to a pretreatment device and method for longitudinal creases in fabric. Background Technology

[0002] In the field of textile inspection, creases formed along the longitudinal direction (i.e., the direction of fabric movement) are a common phenomenon and are usually classified as "false defects." False defects refer to appearance abnormalities caused by external factors such as post-processing, winding, and transportation, rather than inherent material or weaving defects in the fabric. Longitudinal creases often appear as continuous dark or bright lines in optical inspection or visual observation, easily confused with genuine warp defects such as warp shrinkage or warp breakage. Therefore, longitudinal creases need to be pre-treated in actual production.

[0003] Existing technologies utilize heating mechanisms to treat longitudinal creases. These mechanisms consist of an upper heating plate and a lower heating plate, with the fabric moving between them. The upper and lower heating plates are used to iron the longitudinal creases. However, this method requires heating the entire fabric, not just the area near the crease. Ironing a large area of ​​the fabric may cause secondary damage. Furthermore, in this mechanism, the fabric moves between take-up and untake-up rollers. When the upper and lower heating plates are used to iron the fabric, its movement stops briefly.

[0004] Therefore, how to reduce secondary damage to the fabric and effectively eliminate longitudinal creases without affecting the fabric's movement is a technical problem faced by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pretreatment device and method for longitudinal creases of fabric, which can effectively treat longitudinal creases and reduce damage to the fabric during fabric movement.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: In a first aspect, the present invention provides a pretreatment device for longitudinal creases in fabric, comprising a heater, a plate having an inner cavity, a nozzle, a lifting device, a first frame, and a second frame; the two ends of the heater are tumblingly connected to the first frame, the first frame is connected to the lifting device, a roller is fitted on the outer side of the heater, and the roller can move along the axial direction of the heater; the plate is located below the heater, the plate is fixedly connected to the second frame, and the inner cavity of the plate has an air cavity and a water cavity; the nozzle communicates with the water cavity, and the nozzle is movably connected to a slide rail on the outer wall of the plate.

[0007] As a preferred example, the width of the roller is greater than the width of the longitudinal crease of the fabric.

[0008] As a preferred example, the surface of the heater is provided with a track, and the roller and the track are connected by a slider. The heater, roller, track and slider are all made of metal.

[0009] As a preferred example, the pretreatment device for longitudinal creases in the fabric further includes a power source and a lead screw. The power source is fixedly connected to the heater, and the output shaft of the power source is fixedly connected to the lead screw. The lead screw is adapted to the slider, and the power source drives the roller to move along the axial direction of the heater.

[0010] As a preferred example, the pretreatment device for longitudinal creases in the fabric further includes a controller; the top surface of the plate has an array of through holes with electromagnetic valves, the through holes connecting the air cavity to the outside; the top surface of the plate is provided with a pressure sensor, the pressure sensor being located in the pressing area on the top surface of the plate, and the roller being opposite to the pressing area; the pressure sensor is communicatively connected to the signal input terminal of the controller, and the signal output terminal of the controller is communicatively connected to the electromagnetic valves; it also includes an air pump, the air pump being connected to the air cavity of the plate.

[0011] As a preferred example, the number of pressure sensors is equal to the number of columns of through holes, and the pressure sensors are arranged one-to-one with the column through holes.

[0012] As a preferred example, the plate is made of a metallic material.

[0013] Secondly, the present invention also provides a method for pre-treating longitudinal creases in fabric, the method comprising: Collect the location information of the longitudinal creases in the fabric; Based on the position information of the longitudinal crease of the fabric, the roller and nozzle on the heater are moved so that the roller and nozzle are respectively opposite to the longitudinal crease of the fabric; Lower the heater so that the fabric passes between the heater and the board; spray water mist onto the longitudinal folds of the fabric using nozzles; The movement of the fabric drives the heater and rollers to roll, and the rollers press down on the longitudinal creases of the fabric after the water mist is sprayed, making the fabric smooth.

[0014] As a preferred example, the method further includes: The roller presses against the fabric, thereby pressing against the pressure sensor located beneath the fabric; If the pressure value collected by the pressure sensor reaches the threshold, the solenoid valve is opened and the through hole is opened; if the pressure value collected by the pressure sensor is less than the threshold, the solenoid valve remains closed. Gas from the air cavity of the plate is ejected through the through hole to dry the fabric.

[0015] As a preferred example, opening the solenoid valve and opening the through holes includes: opening the through holes in a row, wherein the row of the through holes is opposite to the roller.

[0016] Compared with existing technologies, the pretreatment device and method for longitudinal creases in fabric of the present invention can effectively treat longitudinal creases and reduce damage to the fabric during fabric movement. The pretreatment device for longitudinal creases in fabric of the present invention includes a heater, a plate with an inner cavity, a nozzle, a lifting device, a first frame, and a second frame. The two ends of the heater are tumblingly connected to the first frame, the first frame is connected to the lifting device, and a roller is fitted onto the outer side of the heater, which can move axially along the heater. The plate is located below the heater and is fixedly connected to the second frame. The inner cavity of the plate has an air cavity and a water cavity. The nozzle communicates with the water cavity and is movably connected to a slide rail on the outer wall of the plate. During fabric movement, the nozzle wets the longitudinal creases, and the roller presses the longitudinal creases, effectively treating the creases and making the fabric smooth. The width of the roller is greater than the width of the longitudinal crease, but much smaller than the width of the fabric. This effectively reduces damage to the fabric. Attached Figure Description

[0017] Figure 1 This is a front view of the device according to an embodiment of the present invention; Figure 2 This is a top view of the plate in an embodiment of the present invention; Figure 3 This is a side sectional view of the plate in an embodiment of the present invention; Figure 4 This is a flowchart of a method according to an embodiment of the present invention.

[0018] The diagram includes: heater 1, plate 2, air cavity 21, water cavity 22, through hole 23, nozzle 3, lifting device 4, first frame 5, pressure sensor 6, roller 7, and second frame 8. Detailed Implementation

[0019] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1 As shown, an embodiment of the present invention provides a pretreatment device for longitudinal creases in fabric, comprising a heater 1, a plate 2 with an inner cavity, a nozzle 3, a lifting device 4, a first frame 5, and a second frame 8. The heater 1 is rotatably connected to the first frame 5 at both ends. The first frame 5 is connected to the lifting device 4. A roller 7 is fitted onto the outer side of the heater 1 and is movable along the axial direction of the heater 1. The plate 2 is located below the heater 1 and is fixedly connected to the second frame 8. The inner cavity of the plate 2 has an air cavity 21 and a water cavity 22. The nozzle 3 communicates with the water cavity 22 and is movably connected to a slide rail on the outer wall of the plate 2.

[0021] In the pretreatment device of the above embodiment, the lifting device 4 is activated, driving the first frame 5 to move up and down. Since the heater 1 is connected to the first frame 5, the heater 1 moves up and down with the first frame 5. Both ends of the heater 1 are connected to the first frame 5 via bearings. Since the roller 7 is fitted onto the outside of the heater 1, the roller 7 moves up and down with the heater 1. When it is necessary to heat the fabric, the lifting device 4 is activated, lowering the first frame 5 so that the roller 7 contacts the fabric. The heater 1 has a certain temperature, which can be transferred to the roller 7, so that the roller 7 also has a certain temperature, achieving the heat treatment of the fabric. The plate 2 is fixedly connected to the second frame 8. The plate 2 provides support for the fabric. When the roller 7 heats the fabric, the fabric is located above the plate 2. The nozzle 3 is used to spray water mist onto the fabric before the roller 7 heats it, wetting the fabric. The inner cavity of the plate 2 has an air cavity 21 and a water cavity 22. The water cavity 22 stores water, providing a water source for the nozzle 3. Air chamber 21 is used to spray air outwards to dry the pressed fabric area. Nozzle 3 is movably connected to a slide rail on the outer wall of plate 2. The positions of nozzle 3 and roller 7 can be adjusted to align with the longitudinal creases of the fabric.

[0022] In the pretreatment apparatus of the above embodiment, the heater 1 has a certain temperature and transmits the temperature to the roller 7. The roller 7 is used to press the longitudinal creases of the fabric to eliminate the longitudinal creases. Specifically, when a longitudinal crease is detected on the fabric, the position of the longitudinal crease is obtained, and then the positions of the nozzle 3 and the roller 7 are adjusted so that both the nozzle 3 and the roller 7 are opposite to the longitudinal crease of the fabric. The fabric moves in the gap between the heater 1 and the plate 2. The plate 2 is located below the fabric, and the heater 1 is located above the fabric. The nozzle 3 sprays water mist onto the longitudinal creases of the fabric. The roller 7 presses down on the fabric. The fabric moves between the feed roller and the take-up roller. The movement of the fabric drives the roller 7 and the heater 1 to roll. The roller 7 is in direct contact with the fabric, realizing the pressing of the longitudinal crease area of ​​the fabric sprayed with water mist, thereby eliminating the longitudinal creases.

[0023] The pre-processing device in the above embodiment processes the longitudinal creases of the fabric to make the fabric surface smooth before it enters the inspection area, thus preventing false defects from appearing during the inspection process.

[0024] Preferably, the width of the roller 7 is greater than the width of the longitudinal crease of the fabric. Since the width of the longitudinal crease of the fabric is relatively small, usually less than 1 cm, the width of the roller 7 is preferably set between 1.5 and 3 cm to meet the ironing requirements of the longitudinal crease. If the width of the roller 7 is set too large, more fabric will be ironed, which may cause some damage to the fabric.

[0025] Preferably, the surface of the heater 1 is provided with a track, and the roller 7 and the track are connected by a slider. The heater 1, roller 7, track, and slider are all made of metal. The heater 1 is heated electrically. The heater 1 transfers heat to the roller 7, which presses the longitudinal creases of the fabric. The heater 1, roller 7, track, and slider are all made of metal, thus enabling heat transfer from the heater 1 to the roller 7. The heater 1 can use electric heating or other commonly used heating methods.

[0026] Preferably, the pretreatment device for longitudinal creases in the fabric further includes a power source and a lead screw. The power source is fixedly connected to the heater 1, and the output shaft of the power source is fixedly connected to the lead screw. The lead screw and the slider are adapted to each other, and the power source drives the roller 7 to move axially along the heater 1. The longitudinal creases of the fabric may be located anywhere in its width. By setting the power source and the lead screw, the position of the roller 7 can be adjusted so that the roller 7 can press the longitudinal creases of the fabric. During operation, the power source is started, and the lead screw rotates. The lead screw drives the slider to move in the track, thereby adjusting the axial position of the roller 7 in the heater 1 so that the roller 7 is opposite to the longitudinal crease of the fabric.

[0027] Preferably, the pretreatment device for longitudinal creases in the fabric further includes a controller and an air pump. For example... Figure 2 and Figure 3As shown, the top surface of the plate 2 has an array of through holes 23 with electromagnetic valves, which connect the air cavity 21 to the outside. A pressure sensor 6 is located on the top surface of the plate 2 in the pressing area, and the roller 7 is opposite to the pressing area. The pressure sensor 6 is communicatively connected to the signal input terminal of the controller, and the signal output terminal of the controller is communicatively connected to the electromagnetic valves. The air pump is connected to the air cavity 21 of the plate 2. In this preferred embodiment, the top surface of the plate 2 has an array of through holes 23. The through holes 23 are controlled to open and close by electromagnetic valves. When the electromagnetic valve is open, the through holes 23 connect the air cavity 21 to the outside. Under the action of the air pump, airflow in the air cavity 21 passes through the through holes 23 and flows to the outside. When the electromagnetic valve is closed, the through holes 23 disconnect the air cavity 21 from the outside. When the roller 7 descends and presses the fabric, the roller 7 presses down on some of the pressure sensors 6 located in the pressing area. These pressure sensors 6 are located directly below the roller 7. Pressure sensor 6 transmits the collected pressure value to the controller. The controller determines whether the pressure value is greater than a threshold. If it is, it controls the solenoid valve of the column-direction through-hole 23 in the same column as pressure sensor 6 to open, allowing airflow from air chamber 21 to dry the pressed fabric. An air pump drives the airflow from air chamber 21 out of through-hole 23. Preferably, the number of pressure sensors 6 is equal to the number of columns of through-holes 23, and the pressure sensors 6 are arranged one-to-one with the column-direction through-holes 23. Since the roller 7 is opposite to the longitudinal crease of the fabric, and the width of the roller 7 is greater than the width of the longitudinal crease, the through-hole 23 corresponding to the pressure sensor 6 located directly below the roller 7 can cover the longitudinal crease of the fabric. Because water mist is sprayed onto the longitudinal creases of the fabric, and the water mist diffuses to a certain extent on the fabric, the width of the roller 7 is greater than the width of the longitudinal creases of the fabric. This allows the airflow ejected from the through hole 23 corresponding to the pressure sensor 6 located directly below the roller 7 to dry the area of ​​water mist that has diffused on the fabric.

[0028] Preferably, the plate 2 is made of metal. The plate 2 has a certain thermal conductivity. The roller 7 has a certain temperature. When the roller 7 presses the fabric, some of the heat is transferred to the plate 2. The plate 2 is provided with an air cavity and a water cavity. Some of the heat on the plate 2 is transferred to the air cavity, heating the air and forming a hot airflow to dry the fabric, improving drying efficiency. At the same time, the heat in the pressing area of ​​the plate 2 diffuses to the surface of the plate 2, and the water cavity also absorbs some heat, which facilitates the rapid diffusion of heat from the pressing area and avoids heat concentration in the pressing area, thus preventing damage to the fabric.

[0029] like Figure 4 As shown, this embodiment of the invention also provides a method for pre-treating longitudinal creases in fabric, including: Step 10: Collect the location information of the longitudinal creases of the fabric; Step 20: Based on the position information of the longitudinal crease of the fabric, move the roller 7 and the nozzle 3 on the heater 1 so that the roller 7 and the nozzle 3 are respectively opposite to the longitudinal crease of the fabric; Step 30: Lower heater 1 so that the fabric passes between heater 1 and plate 2; spray water mist onto the longitudinal folds of the fabric using nozzle 3; Step 40: Using the movement of the fabric, the heater 1 and the roller 7 are driven to roll. The roller 7 is used to press the longitudinal creases of the fabric after the water mist is sprayed, so that the fabric is flat.

[0030] The pretreatment method for longitudinal creases in fabric described in the above embodiment first acquires the location information of the longitudinal creases; then, it moves the roller 7 and nozzle 3 on the heater 1 so that the roller 7 and nozzle 3 are respectively opposite to the longitudinal creases; water mist is sprayed onto the lower part of the longitudinal crease using the nozzle 3; then, the heater 1 is lowered, and the roller 7 is used to press and heat the longitudinal creases of the fabric after spraying water mist, making the fabric smooth. This method sprays water mist onto the lower part of the longitudinal creases and then uses the roller 7 to press and heat the longitudinal creases from above, achieving fabric smoothness. This method does not use the entire surface of the heater 1 to heat the entire fabric surface, but rather accurately identifies the location of the longitudinal crease and heats that location and the surrounding area. By accurately identifying the location of the longitudinal creases, physical damage to the fabric is reduced.

[0031] Preferably, the method further includes: The roller 7 presses against the fabric, thereby pressing against the pressure sensor 6 located below the fabric; If the pressure value collected by pressure sensor 6 reaches the threshold, the solenoid valve is opened and the through hole 23 is opened; if the pressure value collected by pressure sensor 6 is less than the threshold, the solenoid valve remains closed. The gas in the air cavity of plate 2 is ejected from the through hole 23 to dry the fabric.

[0032] After spraying water mist onto the longitudinal creases of the fabric and then pressing it, the fabric becomes flat, but the original longitudinal crease area remains wet. This preferred embodiment dries the wet area of ​​the fabric. In this preferred embodiment, the pressure value collected by pressure sensor 6 is used to determine whether the longitudinal (i.e., fabric movement direction) area corresponding to pressure sensor 6 needs drying. Pressure sensors 6 are arranged in a row on the pressing area of ​​roller 7. Since roller 7 is opposite to the longitudinal creases of the fabric, pressure sensors 6 located directly below roller 7 are also opposite to the longitudinal creases of the fabric. If the pressure value collected by pressure sensor 6 reaches the threshold, the solenoid valve is opened, opening the through hole 23, and the air pump sprays gas from the air chamber of plate 2 through the through hole 23 to dry the fabric.

[0033] Preferably, opening the solenoid valve and opening the through holes 23 includes: opening the through holes 23 in a row, with the row of through holes 23 opposite to the roller 7. A pressure sensor 6 is located in the same row as a row of through holes 23. When the pressure value collected by a pressure sensor 6 reaches a threshold, all through holes 23 in the same row as that pressure sensor 6 are opened to dry the fabric.

[0034] In the method described in the above embodiments, longitudinal creases are effectively addressed during fabric movement. The fabric does not need to stop moving during this process. This method achieves continuous fabric movement. Simultaneously, the longitudinal crease areas of the fabric are pressed using a roller, while other areas are not pressed, thereby reducing damage to the fabric.

[0035] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pretreatment device for longitudinal creases in fabric, characterized in that, Includes a heater (1), a plate (2) with an inner cavity, a nozzle (3), a lifting device (4), a first frame (5), and a second frame (8); The heater (1) is rolled between its two ends and the first frame (5), the first frame (5) is connected to the lifting device (4), and the outer side of the heater (1) is fitted with a roller (7), which can move along the axial direction of the heater (1). The plate (2) is located below the heater (1). The plate (2) is fixedly connected to the second frame (8). The inner cavity of the plate (2) is provided with an air cavity (21) and a water cavity (22). The nozzle (3) is connected to the water cavity (22), and the nozzle (3) is movably connected to the slide rail on the outer wall of the plate (2).

2. The pretreatment device for longitudinal creases in fabric according to claim 1, characterized in that, The width of the roller (7) is greater than the width of the longitudinal crease of the fabric.

3. The pretreatment device for longitudinal creases in fabric according to claim 1, characterized in that, The surface of the heater (1) is provided with a track, and the roller (7) and the track are connected by a slider. The heater (1), the roller (7), the track and the slider are all made of metal material.

4. The pretreatment apparatus for longitudinal creases in fabric according to claim 3, characterized in that, It also includes a power source and a lead screw. The power source is fixedly connected to the heater (1). The output shaft of the power source is fixedly connected to the lead screw. The lead screw and the slider are adapted to each other. The power source drives the roller (7) to move axially along the heater (1).

5. The pretreatment apparatus for longitudinal creases in fabric according to claim 1, characterized in that, It also includes a controller. The top surface of the plate (2) is provided with an array of through holes (23) with electromagnetic valves. The through holes (23) connect the air cavity (21) and the outside. The top surface of the plate (2) is provided with a pressure sensor (6). The pressure sensor (6) is located in the heat-pressing area on the top surface of the plate (2). The roller (7) is opposite to the heat-pressing area. The pressure sensor (6) is communicatively connected to the signal input terminal of the controller, and the signal output terminal of the controller is communicatively connected to the electromagnetic valve. It also includes an air pump, which is connected to the air cavity (21) of the plate (2).

6. The fabric longitudinal crease pretreatment apparatus according to claim 5, characterized in that, The number of pressure sensors (6) is equal to the number of columns of through holes (23), and the pressure sensors (6) and the column through holes (23) are arranged one-to-one.

7. The pretreatment apparatus for longitudinal creases in fabric according to claim 1, characterized in that, The plate (2) is made of metal.

8. A method for pre-treating longitudinal creases in fabric, characterized in that, The method includes: Collect the location information of the longitudinal creases in the fabric; Based on the position information of the longitudinal crease of the fabric, the roller (7) on the heater (1) and the nozzle (3) are moved so that the roller (7) and the nozzle (3) are respectively opposite to the longitudinal crease of the fabric; Lower the heater (1) so that the fabric passes between the heater (1) and the plate (2); use the nozzle (3) to spray water mist onto the longitudinal folds of the fabric; The movement of the fabric drives the heater (1) and the roller (7) to roll. The roller (7) presses the longitudinal creases of the fabric after the water mist is sprayed, making the fabric flat.

9. The method for pre-treating longitudinal creases in fabric according to claim 8, characterized in that, The method further includes: The roller (7) presses against the fabric, thereby pressing against the pressure sensor (6) located below the fabric. If the pressure value collected by the pressure sensor (6) reaches the threshold, the solenoid valve is opened and the through hole (23) is opened; if the pressure value collected by the pressure sensor (6) is less than the threshold, the solenoid valve is kept closed. Gas in the air cavity of the plate (2) is ejected from the through hole (23) to dry the fabric.

10. The method for pre-treating longitudinal creases in fabric according to claim 9, characterized in that, The opening of the solenoid valve and opening of the through hole (23) includes: opening the through holes (23) in a row, and the row of the through holes (23) is opposite to the roller (7).

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