There Are Also Some Differences In The Yarn Quality Of China Made Top Selling Products Under Different Conditions.

< p > nylon upper pin can bring certain economic benefits to a target= "_blank" href= "//www.sjfzxm.com/" > textile < /a >, so it has become an effective measure to improve yarn quality in textile mills.

In order to maximize the quality of nylon upper pins, we have made an experimental study on 9 kinds of domestic nylon top pins.

By comparing the quality, the conclusion that nylon top pin is superior to metal iron pin is obtained.

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< p > we use different types of yarns made of homemade MF type, HC type, ZXF type, JH type, QFG type, QFP type, HD-SX3, QS-142 and HD-SX4 nine kinds of nylon upper pins and ordinary SX2-6883 metal iron plates, and are tested with the QS-142 type evenness tester. The test temperature is 20 degrees Celsius and the relative humidity is 60%.

We sampled at the production site, and the number and times of each sample were carried out according to the relevant national standards.

In the test of changing the top pin, the same stage is used to compare the sample with the roving ingot to ensure the comparability of the tested data.

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< p > from the test results, we can see that there is a certain difference in the yarn quality of the domestic top sale under different conditions, but no matter which domestic nylon upper pin is better than the domestic metal iron plate.

Therefore, the domestic nylon upper pin is worthy of popularization and application in textile enterprises.

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< p > the domestic nylon upper pin has made technical breakthroughs in material selection, manufacturing accuracy and spinning quality. Therefore, it can show good adaptability and excellent service performance, and can replace the domestic metal pin. It is not only an ideal renewal product, but also an effective technical measure to improve the yarn quality.

The nylon upper pin can make the drafting performance of the spinning frame more reasonable, and the draft distance is more accurate.

The nylon upper pin has the function of automatic adjustment in the spinning process, so that the apron is always in a state of tension, thereby reducing the phenomenon of the rubber ring being slippery and slippery.

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< p > but through a period of time, we found that the quality of nylon top pins of different varieties is quite different, so we must be careful when choosing them.

Some of the upper springs have different spring forces and are not durable. Individual springs fail or break, resulting in deterioration of the evenness and increase in thickness.

Although this phenomenon is different, it has a serious impact on yarn quality.

Some of them are not easy to be found after being invalidation, and it is easy to cause irreparable losses.

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< p > the deformation of the upper pin is mainly due to the poor straightness of the upper front, the backward sides of the expansion plates are inclined backward, and the place where the spacers are spaced is prone to sag, which leads to the fact that the actual drawing pitch of the spinning frame is larger and the nylon upper pin can not be repaired after being deformed.

In addition, some nylon upper pins are easier to accumulate than iron plate pins and are not easy to clean after they are laid.

It is suggested that manufacturers should further improve the strength, stiffness and deformation resistance of nylon upper pins, while minimizing the design of slots and holes, simplify the structure and improve the antistatic ability, improve the quality of tension springs, improve elasticity and reduce the weakness of the belt.

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