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2020
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Setting Time and Heat Source Performance of Setting Machine
Author:
Setting machine in the process of work, the temperature is the main factor affecting the quality of heat setting, in the operation because the fabric after heat setting, the original existence of the wrinkle is eliminated, the surface smoothness of the improvement, the size of the fabric thermal stability and other performance, and heat setting temperature has a close relationship.
Setting machine in the process of work, the temperature is the main factor affecting the quality of heat setting, in the operation because the fabric after heat setting, the original existence of the wrinkle is eliminated, the surface smoothness of the improvement, the size of the fabric thermal stability and other performance, and heat setting temperature has a close relationship.
The setting time of the setting machine is another main process condition for heat setting. After the fabric enters the heating zone, the time required for heating and setting can be divided into the following parts:
1. Heating time: After the fabric enters the heating zone, the time required to heat the surface of the fabric to the setting temperature.
2. Heat penetration time: After the surface of the fabric reaches the setting temperature, the fibers in each part of the fabric have the same heat penetration time required for the setting temperature.
3. Molecular adjustment time: after the fabric reaches the setting temperature, the molecules in the fiber are adjusted according to the setting conditions.
4. Cooling time: the fabric out of the drying room, so that the size of the fabric fixed down the time required for cooling.
The setting machine usually refers to the setting time, which often refers to the time required for the first three items, excluding the fourth item to a certain extent. If one item is regarded as a preheating effect, then the setting time only refers to the time required for the second and third items, that is, the time required for heat penetration and molecular adjustment.
The time required for heating and heat penetration depends on the performance of the heat source, the weight per unit area of the fabric, the thermal conductivity of the fiber and the moisture content of the fabric. The tension of the fabric during the heat setting process has a certain influence on the quality of the setting, including the dimensional thermal stability, strength and elongation at break of the fabric.
The thermal stability of warp dimension increases with the increase of warp overfeed during shaping, while the thermal stability of weft dimension decreases with the increase of the degree of stretching of the door width. The average single yarn strength of the shaped fabric is slightly higher than that of the unshaped fabric, and the change in the weft direction is more obvious than that in the warp direction. The elongation at break of the fabric after setting, the weft direction decreases with the increase of the degree of elongation, while the warp direction increases with the increase of overfeed.
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24
2020-11
Talk about the role of some parts in the setting machine
We know that during the operation of the setting machine, three important process requirements need to be reasonably controlled, namely temperature, time and pressure. In the tenter drying room, if it is found that the insulation layer of the drying room needs to be replaced or scrapped, the insulation materials filled in it shall be disposed or destroyed according to the relevant local environmental protection regulations. As for the temperature control of the drying room, the process temperature is mainly set by the up and down keys on the temperature control table.
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