The type and source of heterogeneity fiber in machine-picking cotton

GB 1103.1-2012 "Cotton Part 1: Saw-toothed cotton" cotton standard defined in the cotton refers to the non-cotton fibers and non-natural cotton fibers mixed into the cotton, such as chemical fiber, hair, silk, hemp, plastic Film, plastic rope, dyeing line (rope, cloth) and so on.

1. The technique of mulching and dripping pipes is widely used in cotton cultivation in Xinjiang. This technology helps increase production and income, but due to the small thickness of the mulching film used, the poor ductility and toughness, and the long-term exposure to rain and soil microorganisms during cotton growth. The combined effects of light and illumination cause serious damage of the cotton after it matures. In the mechanized harvesting process, due to the lack of mechanical harvesting selectivity to the harvested objects, the spindles of the cotton picker rotating at a high speed and the irreversible deformation of the plastic film The fibers are wound together and collected.

2. At present, planting varieties of machine-cultivated cotton have low start-to-knot height of the cotton plant. When picking by the cotton picker, the height of the pick-up is too small from the ground, and the picking machine can easily pick up the ground film and the dropper belt and the ground. Plastic bags (including food bags, pesticide bags) are picked up together into seed cotton silos.

3. During the process of shipment, storage, and processing of machine-made cottonseed cotton, mechanization is not fully realized. Some parts of the seed cotton harvesting process still require manual pressing and loading, and the hair and belongings dropped by the staff during the transportation, storage, and processing of the seed cotton. Falling masks, gloves, and covering the seed cotton tarpaulin pieces and easily mixed into the seed cotton produce the opposite fiber.

4. In winter, some growers sell the cotton land that has been picked to farmers for grazing. Due to hooking of the cotton rods, part of the livestock hair is left on the cotton stalks, and the second year of seed cotton harvesting brings heterosexual fiber or Into the surrounding unfinished cotton fields, it has caused heterosexual fiber pollution.

The development of foreign fiber cleaning machinery

At present, the cleanup technology of lint fibers is relatively mature. The main use of photoelectric detection method to identify the opposite fiber, the use of high-pressure air flow to remove the opposite fiber, suitable for processing and production in the cotton mill, compared with the lint cotton heterosexual fiber cleaning machinery, seed cotton cross-fiber cleaning machinery to There are many differences in the heterosexual fiber properties in seed cotton, the processing volume of seed cotton per unit time, and the dust flocculation in the seed cotton processing workshop. Currently, the seed cotton cross-over fiber cleaning technology is in the research and development and trial production stage. There is an opposite fiber cleaning machining efficiency and seed cotton production. Problems such as mismatched processing and inability to implement online cleanup.

Control machine picking cotton heterosexual fiber effective measures

1. Accelerate the development of good machine-cultivated cotton varieties, adapt to the key selection of machine-cultivated cotton varieties to be early maturity, disease resistance, boll concentration, fiber length, fruit branch beginning section is not less than 15cm, fruit branches a little short, compact plant.

2. At the source, the quality of the foreign fiber is good, and the thick plastic film is used in planting to increase the toughness and strength of the plastic film. Before picking cotton, do a good job of clean-up of residual film in the field, plastic bags (including food bags, pesticide bags), drip tubes with pieces, and weeds. Grazing in cotton fields is strictly prohibited.

3. Accelerate the design and manufacture of seed cotton cross-over fiber cleaning machinery