What should be paid attention to during the operation of rod granulator?

If the injection screw is forced to squeeze at the feeding port, or if it can not form satisfactory tightness along the length of the barrel to transport the material, the screw will slip. In the pre plasticizing screw, the screw rotates along the spiral direction of the conveying material barrel and the return pile for the next injection, and the screw will attack and slide. If at the beginning of the screw slip in the pre plastic, and then continue in the screw rotation, the axial direction of the screw will stop. Usually, screw slippage will lead to material degradation, injection molding before the attack, also appears in the short shot, processing cycle extension, product quality problems.

The main reason for the formation of the back barrel in the low temperature section is the slippage of the injection screw. The barrel of single screw granulator is divided into three sections. On the back of the material, in the feeding part, the molten polymer layer is heated and shrinks to form the layer in the process. It is fused and pasted in the barrel. If there is no such layer, it is difficult to move the granular material.

The critical temperature at which the heated material is supplied to the component is necessary to melt the attack key. However, the residence time of the material is often too short to reach the temperature of the polymer in the cylinder. This situation may be due to the equipment size is too small, then the corresponding equipment composed of smaller barrel and screw. If the residence time is too short, it is easy to form polymer melt or mix insufficiently, which makes the screw slip or stop.

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