Reaching combination collocation design for increasing front roller diameter (29-31mm) centre distance of spinning frame

Abstract

The invention relates to a combined optimization design of a core working part of a ring spun yarn machine which draws rough yarn by a front roller to form spun yarn. The combined design comprises two parts: one is to use the technology of an adjustable lower pin support of a spinning machine (the patent of Xu Zhongxiang which is a member of the team members: ZL 200620039228.2); the second is to use the front roller with the diameter of 29mm to 31mm. The combined optimization design of the roller and a cot reduces the spinning holding distance (approach), increases the contact arc length of the roller and an upper rubber roll and moves the acting point (shift point) to the direction of a middle roller, thereby being conductive to reducing the actual holding distance, reducing an untwisting area and reducing the end breakage rate. As the diameter of the roller is increased (the general diameter of the roller is 25mm or 27mm), the rotation speed can be reduced at the same line speed, thereby reducing vibration and wear, enhancing anti-torsion and anti-bending properties, leading the roller to bear greater cradle pressure and being applicable to the re-compression process. The technology can significantly improve the spinning quality of the spun yarn and can be used for designing novel spinning machines and transforming old machines.

Description

technical field [0001] This technology is applicable to the spun yarn drafting process in the environment of long and short aprons in the front drafting area of ​​the ring spinning frame in the textile industry. Background technique [0002] 1. In the 1940s, the spinning frame (Nitto Drafting) used by the Japanese textile industry used front, middle and rear rollers with a diameter of 22.2mm. Thereby the center-to-center distance of the front middle roller is 39.7mm, which is suitable for the cotton fiber length at that time. At that time, the weight was used to pressurize, and the front roller was pressurized as 8 / 10 / 12 kg double spindles. At that time, another mainstream spinning frame in the United Kingdom and the United States (including some spinning frames in China at that time) used the front, middle and rear rollers to be 25mm, and used the cradle to pressurize (12 / 14 / 16 kg double spindles). However, when spinning pure cotton yarn, the above-mentioned Nitto draft i...

AI Technical Summary

Problems solved by technology

However, when spinning pure cotton yarn, the above-mentioned Nitto draft is obviously better than that of the mainstream spinning frame of the United Kingdom and the United States. difference in quality

[0003] 2. When using the cradle technology to pressurize, the lower pins of the British, American and domestic spinning frames are all embedded in the grooves of the front middle rollers, which makes it difficult to reduce the center distance of the front middle rollers

Images