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Injection Molding Process |
What is Injection Molding?
One of the types of blow molding processes, injection molding is the technique/ procedure to manufacture hollow objects in bulk quantities. This process uses both thermoplastic & thermosetting materials. It finds application in production of bottles, containers, jars, etc. Further, this process is ideal for both wide and narrow-mouthed containers, as the objects come out to be finely finished with no flash. In comparison to the extrusion blow molding, injection moulding process helps in producing bottles of superior visual & dimensional quality.
Stages in Injection Molding Process:
The Injection Molding Process Mainly Has 3 Stages:
- Injection
- Blowing
- Ejection
Machines Used in Injection Molding Process:
 Hi-tech and advanced injection molding machine is used to carry out this process. The injection molding machines are either electrically powered or hydraulically powered. These machines are rated by tonnage, i.e. the expression of the amount of clamping force that the machine can easily exert. This force helps in keeping the mold closed during the injection process. The injection molding machines are usually applicable in the manufacturing of varied types of plastic items such as car dashboards, combs, cups, bottle caps, plates, crates, bottles, and also large plastic objects like playground equipment; that is whey these machines are also called as plastic injection molding machines. A typical injection molding machine is outfitted with:
- Hopper
- Supporting Bed
- Hydraulic Pump
- Mold
- Barrel fitted with a nozzle at the end
- Clamping Unit
- Ejector
Advantages of Injection Molding:
- Bulk production in fastest possible time
- Over 18,000 types of different material can be used
- Fully automated and need minimal supervision
- The excess material is reusable after melting.
After feeding the resins into the hopper, they are passed through the feed throat & the entire injection barrel. Then the resins are heated up to the required/ specific melting temperature and injected into the mold. In the mold, this melted material takes the desired shape.
 In India, you can find large number of manufacturers and suppliers offering precision engineered injection moulding machines or plastic injection moulding machines.
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