What is plastic injection molding process

Moulten plastic is injected at high pressure into an injection mould tool. The plastic cools inside the tool and takes the inverse form of the cavity machined into the tool. The process takes several stages: 1/ Closing - The tool is closed (the 2 halves are brought together) and clamped under high force. This force is maintained until the end of step 4 2/ Injection - Plastic is injected into the tool at pressure (up to about 2000 bar thus high clamping force required in step 1) 3/ Hold Pressure - Plastic shrinks as it solidifies. The pressure of moulten plastic is maintained for a period of a few seconds (depends on part) to keep filling the tool as this happens. 4/ Cooling - The tool remains closed whilst the plastic cools and becomes solid enough to be ejected. 5/ Opening - The tool is opened. 6/ Ejection - The part is ejected from the tool. The process continues at step 1. The total time for these 6 steps is usually between about 8 seconds and 3 minutes depending on the thickness of the part being moulded. (Steps 3 & 4 take much longer with thick parts.) Times of 20 to 40 seconds are typical.
Plastic injection molding is a complex and intricate process. Simply put, the injection molding uses a plunger to force hot, liquid plastic into a mold cavity.

SPECIFICATIONS

KS 110/PET good services high quality PET Preform Injection Molding Machine price

Main advantages of PET Injection Molding Machine:

(1) Specially designed machine for the production of PET bottle preforms.

(2) A specially designed screw geometry virtually eliminates the production of harmful acid acetaldehydes.

(3)Excellent plasticising rate. Good colour dispersion and moulding stability.

PET Preform Injection Molding Machine

PET Preform Injection Molding Machine, PC PP Bottle Preform Machine, PET Bottle Preform Injection Molding Machine

Ningbo Konger Machinery Co., Ltd. , http://www.kongerchina.com