Nonwoven fabric high speed calendering apparatus

Abstract

The utility model discloses a kind of nonwoven high-speed calendering equipment, including rack;The fire hole for singeing is sequentially arranged on the rack along the assembly line direction, a pair of compression roller for calendering is also provided, and it is also provided with several cloth guide rollers for conveying nonwoven, so that it advances along the assembly line direction;The fire direction of the fire hole is perpendicular to the dust-accepting surface of nonwoven, and the working distance of the fire hole and the compression roller does not exceed 0.3m.The utility model transfers the fire hole for singeing to the rack of calendering and is perpendicular to the dust-accepting surface of nonwoven, realizes the working distance of singeing and calendering to be shortened from 6m in prior art to not more than 0.3m, nonwoven is directly calendered with superhigh temperature after singeing, because the fiber of nonwoven is in molten state under this temperature, at this time, calendering treatment is carried out with relatively low pressure and high speed, and the requirements of semi-finished product appearance and thickness, air permeability index can be achieved, thereby improving production capacity and reducing energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of nonwoven fabric post-processing technology, and specifically refers to a high-speed calendering equipment for nonwoven fabrics. Background Technology

[0002] Nonwoven fabrics, also known as non-woven textiles, are fabrics made using physical methods rather than traditional textile methods. The production process does not involve weaving or knitting yarns into a cloth; instead, it involves binding short fibers, filaments, or mixtures thereof together using mechanical, thermal, or chemical bonding methods. Nonwoven fabrics are widely used in medical and hygiene applications, filtration, packaging, geotextiles, and everyday consumer goods.

[0003] Nonwoven fabrics undergo needle-punching reinforcement during production, resulting in fine fibers on the felt surface and poor surface smoothness. The traditional approach is to first singe off the surface fibers using a singeing machine, followed by calendering with two high-temperature, high-pressure rollers to improve surface finish. This method has several drawbacks: the singeing process is relatively simple, requiring only one horizontally evenly heated nozzle, thus requiring a high singeing speed (approximately 19.5 m / min for polyphenylene sulfide). However, the calendering process demands high temperatures (≥150℃) and high pressures (≥8MPa). Even with the operating parameters increased to the equipment's maximum (e.g., 240℃ and 10MPa), the calendering speed remains less than half that of the singeing speed (approximately 8 m / min), creating a speed mismatch. Furthermore, considering production safety, the equipment cannot be maintained at its extreme operating conditions for extended periods. Therefore, the existing calendering process is a key factor limiting production capacity and impacting efficiency. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-speed calendering equipment for nonwoven fabrics, which solves the problems existing in the prior art and achieves increased production capacity and reduced energy consumption.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A high-speed calendering device for nonwoven fabrics includes a frame; the frame is arranged sequentially along the production line direction with a singeing nozzle, a pair of pressure rollers for calendering, and a plurality of guide rollers for conveying the nonwoven fabric and advancing it along the production line direction; the flame direction of the nozzle is perpendicular to the dust-facing surface of the nonwoven fabric, and the working distance between the nozzle and the pressure rollers does not exceed 0.3m.

[0007] The pressure roller includes two rollers, an upper roller and an lower roller. The lower roller is flush with the top of each guide roller and is on the same horizontal plane.

[0008] The pressure output by the pressure roller is 4.5 MPa.

[0009] The output speed of the guide roller is 18m / min.

[0010] The high-speed calendering equipment for nonwoven fabrics also includes a control panel for setting singeing and calendering parameters.

[0011] After adopting the above technical solution, the present invention has the following technical effects:

[0012] This invention reduces the working distance between singeing and calendering from 6m in the prior art to no more than 0.3m by transferring the singeing flame to the calendering frame and perpendicular to the dust-facing surface of the nonwoven fabric. After singeing, the nonwoven fabric is directly calendered at ultra-high temperature (≥300℃ in actual production). Because the fibers of the nonwoven fabric are already in a molten state at this temperature, calendering can be performed with relatively low pressure and high speed to meet the requirements of semi-finished product appearance, thickness, and air permeability, thereby increasing production capacity and reducing energy consumption. In actual production, the singeing flame intensity can be slightly adjusted to reduce the singeing speed, so that the speeds of the singeing and calendering processes are kept consistent, i.e., they are conveyed by the same guide rollers. Compared with the prior art that requires two separate machines for singeing and calendering, this invention combines the two into one, saving equipment and space costs. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0014] Explanation of icon numbers:

[0015] 1-Frame; 2-Flame; 3-Pressure roller; 4-Guide roller; a-Nonwoven fabric; d-Working distance. Detailed Implementation

[0016] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0017] refer to Figure 1 As shown, this utility model discloses a high-speed calendering device for nonwoven fabrics, including a frame 1; the frame 1 is provided with a singeing nozzle 2 and a pair of pressure rollers 3 for calendering in sequence along the production line direction (arrow direction in the figure), and also with a number of guide rollers 4 for conveying the nonwoven fabric a and making it move forward along the production line direction; the flame direction of the nozzle 2 is perpendicular to the dust-facing surface of the nonwoven fabric a, and the working distance d between the nozzle 2 and the pressure rollers 3 does not exceed 0.3m.

[0018] Through the above solution, this utility model reduces the working distance between singeing and calendering from 6m in the prior art to no more than 0.3m by transferring the singeing torch 2 to the calendering frame 1 and perpendicular to the dust-facing surface of the nonwoven fabric. After singeing, the nonwoven fabric is directly calendered at ultra-high temperature (≥300℃ in actual production). Since the fibers of the nonwoven fabric are already in a molten state at this temperature, calendering can be performed with relatively low pressure and high speed to meet the requirements of semi-finished product appearance, thickness, and air permeability, thereby increasing production capacity and reducing energy consumption. In actual production, the singeing torch speed can be reduced by slightly adjusting the singeing flame, so that the speeds of the singeing and calendering processes are kept consistent, i.e., they are conveyed by the same guide roller 4. Compared with the prior art which requires two separate devices for singeing and calendering, this utility model combines the two into one, thereby saving equipment and space costs.

[0019] The following are specific embodiments of the present invention.

[0020] The aforementioned pressure roller 3 includes two pressure rollers, an upper one and an lower one. The lower pressure roller is flush with the apex of each guide roller 4 and is on the same horizontal plane, so that the nonwoven step a is conveyed along the horizontal direction.

[0021] The pressure output by the aforementioned pressure roller 3 is 4.5 MPa.

[0022] The output speed of the guide roller 4 is 18m / min. After adjustment, the speed of this invention is fixed at 18m / min, which increases the production capacity by 125% compared to the original speed of 8m / min. At the same time, it can also significantly reduce the natural gas consumption of the singeing process and the electricity consumption of the calendering process.

[0023] This invention also includes a control panel for setting singeing and calendering parameters, so that operators can adjust the actual parameters according to different working conditions.

[0024] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A high-speed calendering device for nonwoven fabrics, characterized in that: The machine includes a frame; the frame is provided with a singeing nozzle, a pair of pressure rollers for calendering, and several guide rollers for conveying the nonwoven fabric and moving it forward along the production line direction; the flame direction of the nozzle is perpendicular to the dust-facing surface of the nonwoven fabric, and the working distance between the nozzle and the pressure rollers does not exceed 0.3m.

2. The high-speed calendering equipment for nonwoven fabrics as described in claim 1, characterized in that: The pressure roller includes two rollers, an upper roller and an lower roller. The lower roller is flush with the top of each guide roller and is on the same horizontal plane.

3. The high-speed calendering equipment for nonwoven fabrics as described in claim 1, characterized in that: The pressure output by the pressure roller is 4.5 MPa.

4. The high-speed calendering equipment for nonwoven fabrics as described in claim 1, characterized in that: The output speed of the guide roller is 18m / min.

5. The high-speed calendering equipment for nonwoven fabrics as described in claim 1, characterized in that: It also includes a control panel for setting singeing and calendering parameters.

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