An injection molding machine (also spelled as injection moulding machine in BrE), Usually also called plastic injection machine ,plastic molding machine ,plastic Injection molding. also known as an injection press, is a machine for manufacturing plastic products by the injection molding process. It consists of two main parts, an injection unit and a clamping unit.

Injection molding machine molds can be fastened in either a horizontal or vertical position. The majority of machines are horizontally oriented, but vertical machines are used in some niche applications such as insert molding, allowing the machine to take advantage of gravity. Some vertical machines also do not require the mold to be fastened. There are many ways to fasten the tools to the platens, the most common being manual clamps (both halves are bolted to the platens); however, hydraulic clamps (chocks are used to hold the tool in place) and magnetic clamps are also used. The magnetic and hydraulic clamps are used where fast tool changes are required.

The person designing the mold chooses whether the mold uses a cold runner system or a hot runner system to carry the plastic and fillers from the injection unit to the cavities. A cold runner is a simple channel carved into the mold. The plastic that fills the cold runner cools as the part cools and is then ejected with the part as a sprue. A hot runner system is more complicated, often using cartridge heaters to keep the plastic in the runners hot as the part cools. After the part is ejected, the plastic remaining in a hot runner is injected into the next part.

Types of injection molding machines

Machines are classified primarily by the type of driving systems they use: hydraulic, mechanical, electrical, or hybrid
 

Main components of injection molding machine

Injection unit

Consists of three main components:

　1.Screw motor drive

　2.Reciprocating screw and barrel

　3.Heaters, Thermocouple, Ring plunger

Clamping unit

Consists of three main components:

　1.Mold

　2.Clamping motor drive

　3.Tie bars, the sender is clamped onto the edge of a workbench

Ningo SuRui Machinery Co., Ltd as Professional injection molding machine manufacturer in China, has specialized of High precision injection molding machine, Servo motor energy saving injection molding machine, PET Preform molding machine, PVC,PPR Fittings Injection moulding machine, Bakelite injection molding machine,. and also provide customized machine service . THREEPLAST Injection machine has been widely use in different field, such as Household Appliance, Household commodity, Toy, Electric items , automobile parts/ Automotive parts/ car parts, Stationery accessories etc production and other plastic products making machine .