Molding principle of injection mold, The dried plastic particles enter the molding machine barrel through the molding machine hopper, The plastic particles become molten under the joint action of the heating of the heating sheet and the shear heat generated by the rotation of the screw, The molten plastic accumulates in the head part of the molding machine, The metering screw stops rotating, Change to forward translation, After extruding the plastic melt, the plastic enters the mold gating system, and then flows to the mold forming cavity. After the plastic is cooled, solidified and cooled completely through the heat conduction of the mold itself and the external cooling system of the mold, the mold is opened, and the ejection system of the molding machine ejects the product. At the same time, the screw of the molding machine retreats to start the next plastic melting metering.
There are seven injection molding systems: gating system, guiding system, molding system, core-pulling system, ejection system, cooling system and exhaust system.
Gating system: Main runner, shunt runner, gate and cold material well.
Guide system: Guide posts, guide sleeves, positioning blocks, etc. Molding system: die kernel, insert block, etc. As above page 3 4. Core pulling system: slider, oblique pin, etc.
Ejector system: thimble, ejector block, etc. As above, 5. 6. Cooling system: heat dissipation of mold itself and waterway cooling.
Exhaust system: the fit clearance of each insert of the mold, the fit clearance of thimble and the external exhaust groove.
