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Views: 6 Author: Site Editor Publish Time: 2024-10-14 Origin: Site
Single-end warping machinewhich often means warp yarn to prepare for the subsequent weaving process
warp machine is a device used to adjust warp tension and arrange yarn sequence.
In the textile process, the main function of the warp knitting machine is to sort the yarn according to specific process requirements to ensure tight arrangement and consistent tension between the yarns, providing a stable foundation for the subsequent weaving process
1. Maily function of Single-end warping machine:
According to the regulations of the process design, a certain number and length of warp yarns are led out from the winding tube to form a yarn sheet, so that the warp yarns have uniform tension and are tightly wound parallel to each other on the warp axis, making preliminary preparations for forming the weaving axis.
Requirements for whole scripture
(1). Uniform tension. During warp knitting, the warp yarn must have appropriate tension while maintaining the elasticity and tension of the warp yarn as much as possible. During the warp knitting process, the tension of the entire warp yarn should be as uniform and consistent as possible.
(2). The yarn is arranged evenly. The arrangement and winding density of warp yarns on the warp axis should be uniform (referring to the transverse and inner and outer layer yarns of the warp axis), and the surface of the warp axis should be aligned without unevenness.
(3). The winding density is uniform. The number, length, or color warp arrangement cycle must comply with the weaving process design regulations.
(4). The production efficiency of the warping machine should be high, and there should be less rewinding
Single-end warping machine is a type of textile machinery equipment, whose core function is to organize numerous warp yarns to prepare for the subsequent weaving process. The warp yarn, as its name suggests, refers to the vertically arranged threads in a fabric, with a large number of warp yarns per thread, possibly reaching thousands. In the warp knitting machine, these slender yarns are precisely installed and wrapped around the disc head, forming an orderly structure. Next, these warp yarns will undergo sizing treatment to enhance their strength and weaveability.
In short, Single-end warping machine like the core equipment of a precision textile factory, responsible for organizing numerous warp yarns into neat bundles suitable for weaving .
2. Classification of Single-end warping machine:
It divided into two categories: Batch warping machines and Sectional warping machines.
(1)Batch warping machine:
It can be divided into two categories, one is the traditional drum type friction transmission warping machine, and the other is the new type of warping machine with direct transmission of the warping shaft.
The pressurization method of drum type friction transmission warping relies on the weight of the heavy hammer, the weight of the warp arm, and the weight of the warp shaft itself. After the renovation of the old machine, horizontal pressurization was adopted.
The workflow of the warping machine
The warp yarn drawn out from the new high-speed and self tube frame first passes through the gap between the yarn clamp and the column, passes through the breakage detector, passes forward through the yarn guide porcelain plate, then passes through the yarn guide rod, passes through the telescopic reed, and wraps around the measuring roller before being wound onto the warp shaft. The warp shaft can be directly dragged by a variable speed electric motor. When the winding diameter increases, a speed change signal is sent out by the speed measuring generator connected to the measuring roller, and the motor speed is automatically reduced by the electrical control device to maintain a constant winding speed on the shaft.
Main construction of Batch warp equipment:
Tube rack
Located at the rear of the warping machine, it is used to place warping tubes. There are two commonly used types of tube racks: single tube racks and compound tube racks. Only the working cylinder is installed on the single cylinder rack, and parking is required when changing the cylinder. The duplex bobbin rack is equipped with two sets of bobbin yarn heads connected to each other, so that there is no need to stop when changing the bobbin, which can improve efficiency. But when the yarn frame is too large, it can easily cause uneven tension.
Tension device
Used to control and adjust the tension of each yarn, and make the yarn turn 90 degrees.
Self stopping device for yarn breakage and yarn collecting plate
There is a self stopping device for yarn breakage in front of the yarn frame. During the warp knitting process, when the yarn breaks, the self stopping device will automatically stop the warp shaft from rotating. The purpose of the yarn collection board is to gather yarn in a certain arrangement order.
Fuel dispenser
The purpose of refueling is to prevent static electricity. The direction of rotation of the oil roller is in contact with the warp yarn, and when the yarn passes over the surface of the oil roller, it is coated with oil. The amount of oil added to the yarn can be adjusted by changing the speed of the oil roller.
Yarn storage device
The yarn storage device is used when the yarn breaks. Due to the delay in stopping when the warp yarn is broken, the broken yarn head will be caught up in the warp shaft. When joining, it is often necessary to reverse the warp to exit a certain length of yarn (maximum length of 10m) in order to find the yarn tail and proceed with the joint. The yarn storage device can maintain a certain tension and keep the withdrawn yarn in a straight state when the warp is reversed and rewound. This makes it less prone to looseness and tangling, and facilitates rewinding the yarn onto the warp after connecting the yarn ends.
Static eliminator
There is an electrostatic elimination rod installed below the warp sheet, which uses the corona discharge generated on the needle tip under the action of high voltage potential to ionize the surrounding air, causing the static electricity carried on the warp sheet to escape, thereby achieving the purpose of eliminating or reducing static electricity and ensuring smooth warp knitting.
Telescopic reed
During the operation of the machine, the telescopic reed is located in front of the warp axis to control the width of the warp yarn. Under the action of the eccentric disc, the telescopic reed moves slightly along the axis of the warp, forming a slight cross winding structure on the warp to prevent yarn entrapment and improve its unwinding conditions.
(2) Sectional warping machines.
After the yarn is led out from the tube frame, It is wound one by one onto the drum through the guide rod, rear reed, guide rod, photoelectric end stop piece, splitting reed, fixed amplitude reed, length measuring roller, and guide roller. When reversing the shaft, all the warp yarns on the drum are pulled out counterclockwise according to the double dot line with the rotation of the weaving shaft, and then wound onto the weaving shaft
The main devices of the head part of the slitting and warping machine include slitting, warping drum winding, guide and cone angle adjustment, transverse movement of the weaving shaft when reversing, weaving shaft winding, full twisting self stop and matching printing, braking, and up and down shaft devices. Due to space limitations,
working principle
1 tube frame 2, tube 3, tension device 4, yarn breaking self stopping device
5, yarn guide porcelain plate 6, guide rod 7, telescopic reed
8 yarn guide roller 9 warp shaft 10 warp shaft arm 11 pressure hammer 12 large drum 13 pressure roller
Wrap around the yarn guide roller 8 and wrap around the warp shaft 9. For a regular batch warping machine, the warp shaft is installed in the bearing of the warp arm 10. At the head end of the warp arm, there is a pressure hammer 11, which tightly presses the wholesale warp shaft of the cultural shirt onto the large drum 12. The drum is actively driven by the surface friction between the two, driving the warp shaft to complete the winding motion. For the new batch warping machine, the warp shaft is directly driven and uses a DC motor
Speed regulation, or AC motor variable frequency speed regulation, or hydraulic continuously variable transmission speed regulation, is achieved by the pressure roller 13 to apply pressure to the warp shaft.
In order to reduce the labor intensity of the up and down axis and shorten the stopping time of the up and down axis, what are the components of the sectional warping machine equipped with an up and down axis device. The commonly used up and down axis devices include electric, hydraulic, and pneumatic.
3. Working process of the single-end warping machine:
The workflow of a warp knitting machine can be summarized as several main steps, including yarn supply, yarn arrangement, tension control, winding forming, and final finishing.
Yarn supply:
The first step in warp knitting is to provide yarn for the machine. Usually, yarn is drawn out from large yarn spools or racks, which are placed next to or at the back of the warping machine for operators to replace yarn or perform other operations.
Yarn arrangement:
After the yarn is drawn out, it needs to be arranged in a certain order and density, which is usually done by the yarn guide device and yarn tension device on the machine. The yarn guide device ensures that the yarn can be accurately guided to the predetermined position, while the yarn tension device ensures that the yarn maintains a constant tension during the warp process, which is crucial for the subsequent weaving process.
Tension control:
The tension control of the yarn is crucial during the warp knitting process. If the tension is too high, it may cause the yarn to break; If the tension is too low, it may cause the yarn to loosen during the weaving process. Therefore, warping machines are usually equipped with precision tension control systems to ensure that the yarn maintains a constant tension throughout the entire warping process.
Roll forming:
The arranged yarns will then be wound onto the warp axis to form warp yarns. This process is usually completed by the winding device on the machine. The winding device will uniformly wind the yarn onto the warp according to preset parameters such as winding density, winding speed, etc
Final procedure :
After the warp yarn is wound onto the warp shaft, final finishing work is still required. This includes checking the quality of the warp yarn, such as checking for yarn breakage, looseness, and making necessary repairs. At the same time, it is necessary to label and record the warp shafts for the subsequent weaving process.
The workflow of a warping machine is a highly automated process that requires operators to possess certain professional knowledge and skills. At the same time, the efficiency of the warp knitting machine and the quality of the warp yarn are also affected by various factors, such as the quality of the yarn, the state of the machine, and the skill level of the operators. Therefore, in practical use, it is necessary to regularly maintain and upkeep the warp knitting machine to ensure its normal operation and production of high-quality warp yarn
4.How to choose a Single-end warping machine Manufaturer ？ the following items should be considered:
•Precision and efficiency: High end fabric manufacturing requires high-precision equipment, while efficient production requires high-efficiency equipment.
•Stability: The stability of equipment directly affects production efficiency and product quality.
• Maintenance cost: The maintenance cost of equipment includes parts replacement, repair time, etc., which need to be comprehensively considered.
(1)Choose the appropriate warping machine according to different scenarios:
High end fabric manufacturing: Choose European warp knitting machines because of their high precision and efficiency.
• Ordinary fabric manufacturing: Choose an American style warping machine due to its stable performance and excellent warping effect.
Special materials: Choose Akriel warp knitting machine, suitable for weaving new synthetic fibers.
(2)Finally, considering cost-effectiveness:
• Domestic and imported: The performance of the new domestically produced warping machine is comparable to that of imported equipment, but the price is lower and it has greater cost-effectiveness
