What are the types of injection molding machines?
Injection molding machine, or (Injection moulding machine BrE), also known as an injection press, is a machine for manufacturing plastic products by the injection molding process.It is the main molding equipment for making thermoplastic or thermosetting plastics into various shapes of plastic products by plastic molding mold. It consists of two main parts, an injection unit and a clamping unit.
Injection molding machine structure and function:
The injection molding machine construction and operation are fairly simple. The machine consists of six basic parts. The major components of the machine include a hopper where the raw materials are inserted, a barrel to carry the materials to the heating unit, a heater to break down the materials into liquid, a nozzle to pump the liquid into the mold, a clamping unit to solidify the shape, and an ejector to expel the finished product.
The mold determines the shape for the finished product, and cools the liquid into a solid. While the cooling is in process, the plates of the mold are held together by either mechanical or hydraulic force. This clamping procedure determines the final shape of the finished product. Since different resins have different shrinking values, molds are designed with specific resins in mind.
What is injection molding machine used in？
LI SONG to produce an injection molded product, liquid resin is poured into the injection molding machine hopper, followed by dyes or tints. Gravity draws the resin into the barrel, and the heating process melts the resin into a smooth liquid. An injection mechanism, usually a reciprocating screw or ram injector, forces the liquid into the mold. If small amounts of the resin are desired in the mold, the reciprocating screw is used as it can inject as little as 5% of the entire amount in the hopper. The ram injector is used when at least 20% of the total amount in the hopper needs to be forced into the mold.