Sizing machine is equipped with post-waxing device, which is composed of waxing roller, waxing groove, change gear and corresponding heater, and the position of post-waxing device is at the back of the oven. It is for the sizing and drying of the silk strip, through the waxing roller and waxing groove in the wax roller contact and then a layer of wax, so called after the waxing.
Figure 45 is a sketch of the post-waxing device.
The purpose and function of after waxing: in order to protect the warp film, further improve the lubrication effect and smoothness of the sizing warp, prevent the warp hair, increase the abrasion resistance of the warp, reduce the friction resistance of the wire processing and machine parts, in order to improve the weaving performance and weaving efficiency.
How to apply wax?
Waxing is achieved by contacting the waxing roller with the surface of the warp yarn. When the motor drives the waxing roller to rotate, the molten wax liquid adheres to the surface of the waxing roller, so that the warp yarn passing through the surface of the waxing roller is waxed evenly, stably and continuously. The amount of wax can be adjusted and controlled by the following methods:
(1) Change the speed of waxing roller to adjust the waxing amount. If the speed is fast, the amount of waxing will be more, and vice versa will be less.
(2) Change the contact angle between the warp wire sheet and the waxing roller to control the amount of waxing, the contact angle between the wire strip and the waxing roller increases, the amount of waxing increases, and vice versa, the amount of waxing decreases.
There are also factories in the pulp silk drying after the practice of oil, but not as good as after the waxing effect, but whether it is on the oil or wax, must pay attention to the amount of wax (oil), generally 0.3% to 0.7% is appropriate, the most should be less than 1% (and the proportion of silk). Too low a waxing amount will not have a smoothing effect. If the waxing amount is too high, the reed will be blocked due to dewaxing, and it will increase the difficulty of dewaxing and cause uneven coloring.
In general, it is suitable for waxing in summer and oiling in winter, but for polyester elastic processed yarns which need to be stiffer, it is better to wax later.
The temperature of wax liquid in the wax tank can be controlled automatically according to the set value, some of them adopt the compartment steam heating method, some of them adopt the electric heating wire in the center of waxing rollers or the built-in electric heating bar heating method in the wax tank, and so on.
Usually the waxing temperature is in the range of 75~85°C.
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