Plastic injection mould, injection molding technology
In manufacturing plastic injection mould, Injection molding technology is a technology that ejects materials molten raw materials into an existing shaping system called a mold system, then cooling to liquid materials crystallizes and produces products. It is an injection process. The shorter the process, the lower the products cost. Therefore, in the injection molding industry, it is often calculated that the cost is based on the process of one injection molding.
What is a plastic injection mould?
Mould is the center of mold technology. Mold is manufactured, based on the shape of products as required. Injection molding products are shaped by the structure and shape of the mold cavity (also known as mold core, hoe …).
Mould includes 2 parts called a core, cavity. In technical language, it is divided into 2 parts called move haft and fix haft.
A fixed mold is fixed on the fixed plate of the injection molding machine. One port of the gating system is in contact with the injection molding machine. The fixed part of the flow channel is provided with a heating element so that the material in the fixed mold flow channel maintains a molten state through the fixed part. When the mold is closed, it is connected to the mouth of the injection molding machine. Thus the flow passage extension portion must have sufficient length. Ensure that no melt leaks out during mold opening.
Moving mold moves with the injection mold platen during mold opening. The middle part is driven by the linkage device. Let both parting surfaces open at the same time.
In addition to the 2 main parts that make up the mold, there are some complicated parts such as the hydraulic system, motor system, …
The diagram of a set of molds
Top Clamp Plate: it is for clamping between mold and molding machine.
Fix mold base: with the main function is to connect with the cavity
Move mold base: with the main function is to connect with core
Support plate: The main function is to create free space for the ejector plate and move ejection píns.
Upper ejector plate
Cavity: creating the shape of products
Core: creating the shape of products
Locating ring: connected cavity with the injection moulding machine
Sprue Bushing: lead plastic from an injection nozzle to the plastic channel
Guide pin: Locate Cavity and core when opening and closing
Return pin & spring: Keep the ejector system back after pull part out of the core
Ejector pin: Eject part our of the core
Assemble an injection mold process
Step 1: Take the mold plate into the model
Step 2: Install Sprue Bushing to the top die plate.
Step 3: Install Clamp Plate with a cavity plate
Step 4: Install sprue bushing in the top clamp plate and install bolts to keep two mold plates together
Step 5: install a local ring
Step 6: Install guide pin and guide bush
Step 7: Install the ejector system ( Ejector plate, ejector pin, return pin, spring…)
Step 8: Install the clamping plate