The impact of injection molding on the economy is bigger than you think. Since its invention in 1872, the injection molding process (along with the plastics industry) has turned into a multi billion dollar industry. Injection molding manufactures around 32% of plastics by weight. Because of this process, the construction of a lot of durable consumer and industrial items important to us are made cheap.
Components and specifications of the machine
A typical injection molding machine is made up of the following components: the injection system, hydraulic system, mold system, clamping system and control system. For thermoplastics, the injection molding machine turns pelleted or granular raw plastics into final molded parts using of the following: melt, inject pack and cool cycle.
Clamping tonnage and shot size are usually used to quickly identify the size of the injection molding machine for thermoplastics.
Other parameters are as follows: injection rate, injection pressure, screw design, thickness of mold and the distance between tie bars.
Functions of the machine
Injection molding machines are classified into three categories namely based on machine function: general purpose machines, precision tight-tolerance machines and high-speed, thin-wall machines.
Injection moldings machines also operate using auxiliary equipment, the most important of which include resin dryers, materials-handling equipment, granulators, part-removal robots, mold-temperature controllers and chillers and part-handling equipment.
Expert injection molding companies
Some companies are experts in plastic molding injections. They can manufacture plastics of difficult or high volume parts from a lot of engineering resins.
They also offer plastic injection molding and tooling services. These companies typically have a design group that can assist you with plastic parts and mold designs you require. They have factory controls that can inspect and monitor the process of the parts along with the latest in inspection equipment. This enables them to match the closest tolerance and provide quality that is consistent.