Impurity self-adaptive rotor spinning machine impurity removing and carding method and device

Abstract

The invention provides an impurity self-adaptive rotor spinning machine impurity removing and carding method and device, and relates to the technical field of spinning equipment. The method comprises the following steps of an impurity detection step, wherein when cotton slivers are fed into a carding cavity, impurity information of the cotton slivers is detected through an impurity detector and a detection result is sent to an air injection control device; an impurity self-adaptive air injection step, wherein when the cotton slivers are carded by a carding roller, the air injection control device controls air injection holes, corresponding to the areas where the impurities are located, in the carding roller to inject air according to a detection result so as to improve the cotton sliver looseness of the areas where the impurities are located; and an impurity discharging and carding step, wherein when the carding roller cards the cotton slivers, air is supplied to the carding cavity through an air supply channel, and impurities or partial impurities fall into an impurity discharging belt through the impurity discharging area of the carding cavity under the action of self gravity to be discharged. Self-adaptive air injection based on cotton sliver impurity characteristics is achieved, impurities can be conveniently separated from cotton slivers, and the impurity discharging effect and the energy-saving requirement are both considered.

Description

technical field [0001] The invention relates to the technical field of spinning equipment, in particular to an impurity self-adaptive impurity removal and carding method and device for a rotor spinning machine. Background technique [0002] The rotor spinning machine has become the spinning form with the most mature technology, the widest application range and the largest economic and social effects in the new spinning. Various sundries often appear in the spinning process, such as polypropylene yarn, hair and "three silks", etc. The appearance of these sundries greatly reduces the quality of products produced by raw materials, so the spinning process needs to be carried out Draining to remove impurities in the sliver. [0003] At present, there are two methods for carding and stripping impurities in the air-suction rotor spinning machine on the market: the first one is to use the centrifugal force of impurities to carry out free doffing. It usually arranges the carding ro...

AI Technical Summary

Problems solved by technology

[0005] 1) When the free-falling method is adopted, during the separation process of impurities, light impurities such as short fluff and other light impurities are not far away during separation, and they are closer to the fiber conveying area. After the area is accumulated, it will be sucked back into the carding cavity, resulting in turning and sucking back, resulting in an increase in the yarn breakage rate, and poor adaptability to recycled raw materials with more short-pile impurities

When the active gettering method is adopted, a relatively high gettering negative pressure is required to strip the impurities along the horizontal direction, and small fluctuations in the gettering negative pressure will lead to changes in the number of excluded impurities, which in turn will cause large variations in the thickness and details of the yarn; and There are also disadvantages of high energy consumption of equipment and easy blockage of getter channels

That is to say, the existing method of combing and stripping impurities in rotor spinning machines cannot achieve comprehensiveness in terms of raw material adaptability, consistent yarn quality, and low energy consumption.

[0006] 2) Regardless of whether it is free falling or active suction, all the slivers entering the carding chamber are discharged and carded based on the same waste removal process, and the waste removal process cannot be based on the impurity characteristics of the raw material of the sliver—such as Impurity distribution area, impurity type characteristics, etc. - adaptive adjustment

In fact, the impurities are not evenly distributed on the sliver. Some slivers have smaller impurities, and some slivers have more impurities; the types of impurities and the connection between impurities and slivers are not the same. Impurities are closely connected to effective fibers, some types of impurities are loosely connected to effective fibers, etc.

As an example, impurities that are tightly connected often require a large external force to be separated from the sliver, while impurities that are loosely connected are easily separated from the sliver without providing a large external force. Taking care of one thing and losing another, may cause energy waste or fail to achieve the effect of decontamination

Images