Talking about the generation and control of heterogeneous fiber in machine cotton

Because the mechanized harvesting is suitable for the large-scale planting of the Corps, it can reduce the labor intensity of the growers, alleviate the labor shortage and reduce the production cost. In recent years, the machine cotton picking technology has been vigorously promoted in the Xinjiang Corps. However, with the gradual advancement of the cotton market economic system reform and development, the state initiated the cotton target price reform pilot work, canceled the cotton temporary storage policy, the market began to play a leading role in cotton sales, machine cotton sales encountered difficulties. In particular, the problem of heterogeneous fibers in machine-made cotton has become the biggest stumbling block on the road of machine-made cotton to the market. Solving the problem of machine-made cotton heterogeneous fibers is the key node for propeller-type cotton picking technology.

Types and sources of heterogeneous fibers in machine cotton

GB 1103.1-2012 "Cotton Part 1: Sawtooth processing of fine cotton" The definition of heterogeneous fiber in the cotton standard refers to non-cotton fiber and non-natural cotton fiber mixed into cotton, such as chemical fiber, hair, silk, hemp, plastic. Film, plastic rope, dyeing line (rope, cloth), etc.

1. Cotton planting in Xinjiang is widely used in plastic film mulching and dropper technology. This technology is helpful for increasing production and income. However, due to the small thickness of the film used for covering, the ductility and toughness are poor, and the rain and soil microorganisms are exposed to cotton for a long time. The comprehensive effect of light and light causes serious damage after the cotton matures. In the mechanized harvesting process, due to the lack of selectivity for the harvesting object due to mechanical harvesting, the high-speed rotation of the picking machine and the detachment of the film are easy. The fibers are entangled and collected together.

2. At present, the planting cotton planting varieties have a low initial height of the cotton plant. When the cotton picker picks, the height of the ingot is too small from the ground. When the cotton picker picks, it is easy to scatter the ground mulch and the dropper belt and the ground. Plastic bags (including food bags, pesticide bags) are picked up into seed cotton bins.

3. In the process of loading, storage and processing of cottonseed cotton, the mechanization is not fully realized. Some seed cottons still need manual stamping and loading during the process of harvesting and shipping, and the hair and the staff left by the workers during the seed cotton shipment, storage and processing. Falling masks , gloves, and cover cotton tarpaulin pieces and easy to be mixed into seed cotton to produce foreign fibers.

4. In the winter, some growers sell the harvested cotton land to the farmers for grazing. Due to the hooks of the cotton rods, some of the livestock hairs are left on the cotton stalks, which will bring the heterogeneous fibers to the second year of seed cotton harvesting. It brings foreign fiber pollution to the unpicked cotton fields around.

Development status of heterogeneous fiber cleaning machinery

At present, the lint fiber cleaning technology is relatively mature, mainly adopting photoelectric detection to identify foreign fibers, and using high-pressure airflow to remove the foreign fibers, which is suitable for processing in cotton spinning mills. Compared with the lint fiber cleaning machine, the seed cotton fiber cleaning machine must be Customer service seed cotton has large differences in heterogeneous fiber traits, large amount of seed cotton processing per unit time, and more dust and floc in seed cotton processing workshop. At present, the seed cotton heterogeneous fiber cleaning technology is in the stage of research and development and trial production, and there are heterogeneous fiber cleaning machining efficiency and seed cotton production. Some problems such as mismatched processing and online cleaning cannot be achieved.

Effective measures for controlling cotton picking fiber

1. Accelerate the cultivation of excellent machine-picked cotton varieties. The key varieties to be used for cotton picking are early maturity, disease resistance, concentrated floc, long fiber, no less than 15cm in fruit branch, short fruit branches and compact plant shape.

2. At the source, the quality of the heterogeneous fiber is closed, and the thick film is used in the planting to improve the toughness and strength of the film. Before the cotton picking, do a good job in the field of residual film, plastic bags (including food bags, pesticide bags), dropper with pieces, weeds. Grazing in cotton fields is strictly prohibited.

3. Speed ​​up the design and manufacture of seed cotton foreign fiber cleaning machinery