Typical structural components of a vertical injection molding machine

1. Composition of injection parts

At present, vertical injection molding machine commonly used injection device has single cylinder and double cylinder. Due to different manufacturers, different models, its composition is not completely the same.

Its working principle is: in the process of preforming, plasticizing of screw through the hydraulic motor to drive the spindle rotating, one end of the spindle and screw connection, the other end connected to the hydraulic motor key, screw rotates, material plasticizing, plasticizing molten material at the same time, after the screw under the reaction of the material move backward, thrust by moving back thrust bearing, the piston rod through the nut pull back to complete the measurement directly. When fuel injection, the oil in the cylinder rod cavity pushes the piston rod through the bearing to complete the action, and the oil in the piston rod cavity pushes the piston rod and the screw to complete the oil injection action.

The injection parts of the Angle injection molding machine are the same as those of the vertical injection molding machine.

2, plasticizing parts

Plasticizing parts have plunger type and screw type two kinds. This is a spiral introduction.

The screw plasticizing part of the small vertical injection molding machine is mainly composed of screw, cylinder, nozzle, etc. In the continuous advancement of the screw, the physical state of the plastic changes, and finally in the molten state and injected into the mold cavity. Therefore, plasticized parts are the core parts to achieve uniform plasticization and quantitative injection.

Screw plasticization of how it works: in the process of pre plasticizing, screw rotation, that from the mouth fell into the screw groove material continuously forward, heating ring through material are compared.in transfer heat to the screw groove material, solid materials in external heating and screw rotation shear under the dual role of plasticizing melt, through screw each function period of heat treatment, the melt push check ring, through channels to screw the front around the screw head back pressure, push the screw move backward, to complete the measurement of molten material. In the injection process, the screw acts as a plunger, moving rapidly forward under the action of the cylinder, and injecting the melt from the storage chamber through the nozzle into the mold.