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The mold is made by a toolmaker or a die maker from metal, usually either steel or aluminums.

Injection Molding Machine

A basic injection-molding machine is typically composed of the injection system, hydraulic system, and mold system, clamping system and control system. The injection molding process was invented in 1872. Injection molding machines have two basic parts: the injection unit and the clamping unit. Thermoplastic injection molding reduces palletized raw materials and colorants into a hot liquid. Blow molding is similar to injection molding except that hot liquid plastic comes out of a barrel vertically, in a hollow molten tube.

Some plastic mold equipment design and fabrication services specialize in the design of plastic injection mold equipment. Others specialize in the manufacture of plastic fabrication equipment for extrusion processes. Many suppliers offer both plastic molding services and plastic mold equipment design services in addition to standard product offerings. Companies that provide industry-specific plastic fabrication services are also available.

The injection-molding machine can be classified into three categories, namely: general-purpose machines, precision/tight-tolerance machines and high-speed thin-wall machines. All three types require auxiliary equipment to function. These support equipment includes dryers (resin), material handling equipment, granulators, mold temperature controllers and chillers, part-handling equipment and part-removal robots.

Electric injection mold machine

Injection power on the electric injection unit is 300 kW. This much power on a unit this size is usually found only on a hydraulic machine with an accumulator, not on an all-electric machine, notes Erne, who adds that the system would be suitable for thin-walled, high-speed molding applications.

Molding machine can provide unsurpassed process repeatability by segregating the molding process into the logical stages of fill, pack, and hold. Maintaining consistency of these three stages of molding separately allows the molder to build a simple, repeatable, robust process with minimal complexity.

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