What You Should Know About Cotton Ginning Machine

 

A cotton ginning machine is used to process cotton, primarily to remove seeds and foreign matter, making cotton a raw material for the textile industry. It can greatly improve processing efficiency and product quality, and is one of the indispensable equipment in the modern textile industry.

Types of cotton ginning machine

Cotton ginning machine is also known as cotton gin, it can be divided into two types, one is the roller ginning machine and the other is the saw ginning machine.

Roller ginning machine

The contact traction between the roller and the cotton fiber is used to separate the fiber from the cottonseed.
Features
  • Low speed, soft action, not easy to break the fiber.
  • Fewer defects such as neps and wires.
  • Raw cotton contains a lot of impurities.
  • Lots of short fleece.
  • It is suitable for processing long-staple cotton or seed cotton with poor maturity and reserved seed cotton, with an output of 40-50kg.
  • The length of long-staple cotton is >33mm, and the fineness is 7000-8000 metric.
  • Suitable for spinning fine yarns 3-7tex (80-200 counts).
  • The appearance of the finished yarn is better, so the carding noil rate needs to be increased, otherwise the yarn strength and evenness will be affected.

Saw ginning machine

The fiber is pulled by the saw tooth hook to separate the fiber from the cottonseed.
Features
  • High speed, strong effect, easy to cut fibers.
  • It is easy to produce defects such as neps and wires.
  • There is an impurity removal system, and the raw cotton contains less impurity.
  • The short-lint rate is low, the uniformity is good, and the cotton is loose.
  • It is suitable for processing fine and coarse cotton, with an output of 300-500kg.
  • The fine cotton is 25-33mm long and 5000-6000 public counts.
  • Suitable for spinning medium and fine yarns 9-28tex (21-60 counts).
  • It is conducive to the improvement of yarn strength and evenness, but it will affect the appearance of yarn when there are many rolling defects.

Working principle

Roller ginning machine

The working principle of the roller ginning machine can be simply summarized as follows: the cotton that has been preliminarily cleaned is transported to the pressing system through the feeding system, and then compacted by steel wheels and rubber rollers to make it more compact. Subsequently, the cotton is separated from the cottonseed and other impurities through the separation system and discharged out of the cotton gin through the discharge system.

Saw ginning machine

The seed cotton is preliminarily loosened and cleaned by the multi-drum cleaning machine, and then fed into the cotton storage box, and then enters the front box along the cotton feeding roller and cleaning roller along the cotton board. The front box is equipped with mechanical parts such as cotton take-in rollers and shell resistance ribs. The saw blades of the saw drum protrude from the gap of the ribs of the blocking shell and contact the seed cotton in the front box, and the seed cotton is transferred to the saw drum by the cotton pulling roller. When the saw blade drum rotates, the saw blade catches the fiber and brings the seed cotton into the middle box through the shell resistance rib. Since the seed cotton is continuously brought into the middle box by the saw blade and rotates with the saw blade drum, the lap movement is formed in the lap box (composed of arc-shaped cohesive plates and movable cover plates). When the seed cotton is brought to the ginning ribs by the saw blades of the saw drum, the cotton seeds cannot pass through because the gap of the ginning ribs is smaller than that of the ginned cotton seeds. Then, the fiber is separated from the seed and brought into the back box by the saw blade, and the unpassed seed will be output from the seed outlet.
This blog is reproduced from here.

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