Test Method for Trash Analyzer


The impurity ratio is the percentage of impurities in the raw cotton sample to the sample mass.

Impurity content is an important indicator for measuring cotton quality. Whether it is during mechanical or manual picking, these non-harmful impurity will inevitably be “mixed” the cotton. The percentage of impurity content directly affects the quality of cotton and the subsequent processing. For example, the impurity content of machine-picked cotton is generally between 8% and 16%. When the moisture content of seed cotton is greater than 9%, the adhesion between impurities and cotton fibers will increase with the increase of moisture, making it difficult to remove impurities, resulting in an increase in the impurity content of the ginned cotton. Therefore, controlling the impurity content in cotton is crucial to ensuring cotton quality.

Working principle of trash analyzer

YG041 Trash Analyzer mainly uses the difference in specific gravity between fibers and impurities to separate cotton fibers from impurities under the action of airflow and centrifugal force after combing raw cotton, cotton rolls and raw sliver samples. Cotton fibers are collected into the clean cotton box under the action of airflow, and impurities are separated and fall into the impurity box under the action of gravity, thereby achieving the purpose of removing impurities.

Test method

The batches sampling of raw cotton shall be carried out in accordance with the provisions of GB1103.1, GB 1103.2, GB/T 1103.3 and GB/T 19635. The sampling of laboratory shall be carried out in accordance with the provisions of GB/T 6097. The laboratory samples shall be no less than 600g.
There are two methods for determination of impurity rate content in raw cotton: Raw cotton impurity analysis machine method. And fully automatic raw cotton impurity analysis system method. YG041 Trash Analyzer adopts the former methods, so the following introduces it.

Trash analyzer

Our product–YG041 Trash Analyzer does use this extraction method. It is used to determine the amount of the impurity of raw cotton, cotton rolls, and chemical fiber defect. This machine is mainly composed of wall panels, cotton feeding device, licker-in roller, fan and transmission device. Each component is connected into a whole by two vertical wall panels. The whole machine body and transmission components, motor and electrical devices are all inside the cover. The cotton feeding roller is driven by a special slow-speed motor, and the cotton feeding speed is controlled as needed through the universal conversion switch. There is a lighting device above the impurity box inside the machine, which is equipped with a low-voltage (24V) 20W electric lamp. The red button on the electrical button panel is the stop button, and the green button is the start button. The standard configuration is main machine, feed plate, outlet funnel, filler gauge and brush. Besides, the electronic balance (200g, 0.01g) can be selected as you like.
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