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Prepare for sizing, drying and rolling the weaving beam.

Number of warp beams: 12 shuttle sizing machines, 16, 20, 24 shuttleless looms

Creel type: one-row type, mountain type, double-layer type

3. Sizing device

Mainly includes: yarn introduction roller, sizing tank (immersion roller, sizing roller, pressing roller), moisture separation twisting rod.

1. Dipping and pressing:

The warp yarns undergo repeated soaking and pressing in the sizing tank.The number of pressings varies according to different fibers and different post-processing requirements

Single dipping and single pressing: suitable for sizing viscose fiber warp yarns, which can reduce the wet elongation of the sized yarns;

Single dipping Double-pressing: suitable for medium-thick special cotton yarn;

Double-dipping, double-pressing and double-dipping and four-pressing: Warp sizing of synthetic fiber blended yarns and general high warp and density fabrics is more conducive to the penetration and coating of the slurry. (As shown below)

4. Drying device:

1. Tasks and requirements of sizing drying:

Basic task: evaporate excess moisture in wet sizing yarn to achieve the sizing yarn moisture regain required by the process. The drying process is closely related to the quality of sizing.

Requirements

(a) The drying process is required to form a complete slurry film and make the hairiness adhere.

(b) The elongation of the yarn during drying should be reduced as much as possible and the original elongation should be maintained.

(c) A good drying process can make full use of the provided heat energy, improve drying efficiency, reduce energy consumption, and reduce production costs.

(d) The drying device has a simple structure and is easy to maintain and operate.

　2． Sizing machine drying methods and principles

(1) Convection heating method: used in hot air sizing machines, by blowing heated air to the sizing surface at a certain speed to transfer heat to the wet slurry yarn.

Advantages: ① The effect is uniform and gentle, and the sizing yarn has a full feeling; ② Adjacent sizing yarns have less adhesion to each other and good film-forming properties; ③ The yarn separating rod separates yarn easily, and there is less sizing and fluffing.

Disadvantages: ① Low drying efficiency and high steam consumption; ② Long threading length in the drying room, prone to accidental elongation; ③ Difficulty in breaking ends, complex drying room structure.

(2) Heat conduction method: Drying cylinder sizing machine.

Advantages: ① The yarn is in direct contact with the surface of the high-temperature drying cylinder, with large drying capacity and high efficiency.

② The temperature is easy to control. The drying cylinder can be divided into arrays,

　③The yarn runs close to the drying cylinder, and the arrangement will not be disrupted. At the same time, the yarn elongation is uniform and easy to control, and the yarn elongation is only about 60% of that of the convection heating method.

④The drying room has a simple structure and is easy to operate and maintain.

Disadvantages: When the yarn is wet, it is in direct contact with the surface of the high-temperature drying cylinder and easily adheres to the surface of the drying cylinder, destroying the integrity of the slurry film.

The surface of the drying cylinder is coated with a polytetrafluoroethylene anti-stick layer.

5. Front part:

The weaving beam winding requires constant tension, the winding density should be uniform, and the weaving beam winding should be well formed. The upper and lower shafts of early sizing machines were mechanical semi-automatic upper and lower shafts.Greater dynamic intensity. The new sizing machines all adopt hydraulic or pneumatic upper and lower shafts to reduce the labor intensity of workers.

Automatic control content:

(a) Warp unwinding tension control

(b) Size tank liquid level control

( c) Slurry temperature control in the slurry tank

　(d) Pressure roller pressure control as the vehicle speed changes

　(e) Drying room temperature control

　(f) Sizing moisture regain control

　(g) Automatic control of weaving beam pressure roller