Knowledge related to injection mold processing

Injection mold processing is the process of giving shape and size to plastic parts during the molding process. The structure of the mold may vary greatly depending on the type and performance of the plastic, the shape and structure of the plastic product, the type of injection machine, etc., but the basic structure is consistent. Plastic products, such as chairs, disposable tableware, toys, electronic product shells, LEGO bricks, etc., are ubiquitous in our lives. One of the commonly used methods for mass production of plastic products is injection molding.

Injection mold processing mainly consists of three parts: casting system, forming parts, and structural parts. The pouring system and forming parts are the parts that come into direct contact with the plastic, and vary depending on the plastic and product, requiring complex, variable, processing glossiness, and precision parts in the forming mold.

1. Pouring system

This is the flow channel part before plastic enters the mold cavity from the nozzle during the injection mold processing, including the main flow channel, cold material hole, diversion flow channel, gate, etc. Forming parts are various components that make up the shape of a product, including movable molds, fixed molds and cavities, cores, forming rods, exhaust ports, etc< br/>2、 Sprue

Injection mold processing connects the nozzle of the mold injection machine to the flow path or cavity passage. The top of the main road is concave and connected to the nozzle. The inlet diameter of the main road should be slightly larger than the nozzle diameter to avoid overflow and prevent blockage caused by inconsistent connections between the two< br/>3、 Cold material hole

The cavity set at the end of the main flow path collects the cold material generated between the two injections at the nozzle end to prevent blockage of the diversion path and gate. When cold materials are mixed into the mold cavity, the manufactured product is prone to internal stress. In injection mold processing, in order to facilitate demolding, the bottom is often supported by a demolding rod.

The top of the demolding rod is designed in a serpentine hook shape, or a recessed groove is provided to facilitate the smooth extraction of excess material from the main flow path during demolding.