WHAT IS INJECTION MOULDING?
Injection moulding is one of the most commonly used manufacturing processes for the manufacturing of plastic parts. Products manufactured using injection moulding vary greatly in size, complexity, and application. Injection moulding is done using an injection moulding machine, raw plastic material, and a mould. The plastic is melted in the injection moulding machine and then injected into the mould, where it cools and solidifies into the final object.
TOYS AND ARTS
HOW DOES INJECTION MOULDING WORK?
Plastic injection moulding follow a few stages of production:
Clamping - Prior to the injection of the material into the mould, the two halves of the mould must first be securely closed by the clamping unit. Each half of the mould is attached to the injection moulding machine and one half is allowed to slide. The hydraulically powered clamping unit pushes the mould halves together and exerts sufficient force to keep the mould securely closed while the material is injected.
Injection - The raw plastic material, usually in the form of pellets, is fed into the injection moulding machine, and advanced towards the mould by the injection unit. During this process, the plastic is melted with heat and pressure. The molten plastic is then injected into the mould very quickly and the build-up of pressure packs and holds the material. The amount of material that is injected is referred to as the shot. The injection time is difficult to calculate accurately due to the complex and changing flow of the molten plastic into the mould.
Cooling - The molten plastic injected inside the mould begins to cool as soon as it makes contact with the interior mould surfaces. As the plastic cools, it solidifiesinto the desired shape. The packing of material in the injection stage allows additional material to flow into the mould and reduce the amount of visible shrinkage. The cooling time of the molten plastic can be estimated from several thermodynamic properties of the plastic.
Ejection - After sufficient time has passed, the cooled part may be ejected from the mould by the ejection system, which is attached to the rear half of the mould. When the mould is opened, a mechanism is used to push the part out of the mould. Force must be applied to eject the part because during cooling the part shrinks and adheres to the mould. In order to facilitate the ejection of the part, a mould release agent can be sprayed onto the surfaces of the mould cavity prior to the injection of the material. The time that is required to open the mould and eject the part can be estimated from the dry cycle time of the machine and should include time for the part to fall free of the mould. Once the part is ejected, the mould can be clamped shut for the next shot to be injected.
WHY CHOOSE PLASTIC INJECTION MOULDING SERVICES?
Plastic injection moulding in india has several advantages which makes it an option that cannot be overlooked.
Highly efficient – fast production:
The processis extremely fast compared to other methods, and the high production output rate makes it even more efficient and cost-effective. Speed depends on the complexity and size of the mould but only about 15-120 seconds pass between each cycle time.
Labour costs are typically relatively low in plastic injection moulding in India, in comparison with other types of moulding processes. The ability to produce the parts at a very high level with a high output rate helps with its cost efficiency and effectiveness.