As a professional loosening machine manufacturer, we have been producing and selling loosening machines for many years. For how the limit block loosening machine is loosened, Xiaobian will learn from you.

 Loosening relies on the blades, fins, angle nails, needle teeth or serrations on the high-speed rotating percussion parts (also known as beaters) to strike, divide, and tear the raw materials, destroying the connection between the fibers and the fibers and the impurities, so as to achieve the purpose of loosening the fiber blocks and removing impurities.According to the different feeding methods of raw materials, loosening can be divided into two ways: loosening in the free state and loosening in the holding state.

(1) The loosening effect of the fiber block in the free state

  The way in which the raw material is hit by the machine parts in the free state, so that the raw material obtains the impulse of the blow and loosens is called a free blow.

  The percussion parts include angle nails, blades, serrations, etc.For example, the interaction between the rollers in the multi-roller cotton opener, the axial flow loosening machine, and the phase interaction between the three-xilin cotton opener and the hair-opening xilin in the cotton opener are all free-strike loosening effects.

  Free loosening only performs preliminary loosening of the raw materials. The fiber blocks after loosening are still large, and they still need to undergo strong loosening, such as loosening in a dry state, so that the large fiber blocks are loosened into small fiber blocks or fiber bundles to meet the work requirements of combing.

(2) The loosening effect of the fiber block in the holding state

  While the raw material is feeding people in the machine in the holding state, it is hit by the loosening piece, which is called the loosening of the grip.The role between the beater and the cotton-feeding roller in the porcupine cotton-opening machine and the cotton-eliminating machine in cotton spinning, the role between the wool-opening xilin of the wool-opening machine and the wool-feeding roller in wool spinning, and the cotton-opening xilin of the cotton-opening machine in silk spinning.

  The effect between the cotton-feeding thorn roller and the cotton-holding knife is the loosening of the blow in the holding state.

1.Analysis of the strike process.As shown in Figure 4-4, the force of the beater when hitting the fiber layer is shown.Taking the loosening between the beater and the cotton roller on the cotton spinning and cleaning machine as an example, the process of cracking and loosening is analyzed.The cotton layer is slowly fed into the machine by the cotton feeding roller, and the beater rotates at high speed to feed the cotton layer exposed under the jaws. The strike force of the cotton layer by the beater is P, and its direction is along the tangent direction of the movement trajectory of the beater blade. P can be decomposed into two parts, namely PI and P2.The partial force PI points to the direction of the connection between the strike point and the center of the lower cotton roller. It causes the fiber layer to be instantly compressed, making it tight, increasing the loosening resistance and the friction between the beard cluster and the beater blade.

  If the force P2 is less than the inter-fiber contact force and the feeding jaw grip force, less than the inter-fiber contact force and the feeding jaw grip force is less than P2, the whole piece of whisker will be dragged into the machine by the beater without loosening.Therefore, when the connection force between the fibers is large, not only must there be a greater strike force, but also a greater grip force of the feeding jaws, so that the fiber block can be loosened.

2.Grip strike strength Grip strike strength is usually measured by two indicators: strike impulse and number of strikes.

  (1) Strike impulse: A grip strike uses a high-speed rotating mechanism to strike the human-feeding fiber layer being held, so that the fiber block gains impulse and loosens. In order to destroy the connection between the fibers, it is necessary to have a larger strike impulse. The product of the strike force and the strike time is called the strike impulse.

  (2) Number of strikes: The number of strikes refers to the number of strikes received by the blade on the unit fiber layer.If the number of blows is large, and the weight of the fiber bundle pulled off each time is small, the loosening effect is good.

3.The loosening characteristics of holding the blow.The grip blow has a severe effect on the raw material, and the loosening and impurity removal effects are stronger than free loosening, but fiber damage and impurity breaking are more serious than free loosening.In terms of craftsmanship, free loosening is generally arranged first, and then grip loosening is arranged.