The Company is committed to Total Customer Satisfaction and will set, measure, action and review Quality Objectives to continually improve the effectiveness of the Quality Management System.


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The complete cycle of Plastic Injection Moulding Explained in Detail

Plastics are the cheapest raw materials available in the market. Plastic gets in to proper shape and size by the process of Injection Moulding. Plastic injection moulding is the process of manufacturing of plastic components. Plastic is an economical material which is used in various applications. Plastic Injection moulding is a process of forcing molten plastic by the application of pressure.

Plastic in the form of powder or liquid is fed through hopper into the barrel which is heated up to certain temperatures where it is mixed and then forced through a nozzle with the help of a plunger to the mould cavity where it hardens by cooling and sets to the configuration of the mould. The plunger is used to force the heated raw material through the nozzle. The plunger which is usually used is a ram or a screw-type. The mould is designed and made from steel or aluminium, and then precision machined forming the desired parts. Plastic Injection moulding is used to manufacture various parts, varying from small components to whole body of a vehicle. Manufacturing a mould is very expensive, so a mould is only used for mass productions. Moulding is the process of shaping a raw-material into the desired shape, by applying pressure. A mould is a hollow block which is filled with a liquid like plastic, glass or a rubber. Plastic injection moulding is one of the types of moulding which involves injecting a raw material into a pattern and applying certain factors like heat and pressure.

CYCLE OF INJECTION MOULDING

The sequence of events through which a raw material is converted into a finished part is known as the injection mould cycle. It includes the supply of granules being fed into a hopper to a heated chamber, where the granules are melted into the form of a liquid. Then a plunger is used to force the liquid through a nozzle to the mould. These processes are repeated again to form a cycle for mass production of products.

TYPES OF PLASTIC INJECTION MOULDING

The above described method is the conventional method of plastic injection moulding, although various other unconventional processes include co-injection moulding, fusible core injection method, injection-compression moulding, thin-wall moulding, powder injection moulding and many more.

With Plastic Injection moulding, a variety of plastic goods can be manufactured. Huge numbers of identical products can be manufactured with this process. A design engineer considers lot of parameters and venture specifications and designs accordingly. Manufacturing problems can be prevented right at the initial stage of design itself.

There are more than 30,000 unique products that can be moulded using plastic injection process. Its advantages include repeatable high tolerances, low labour cost, high production rates, easy to finish parts after moulding and the ability to use extensive range of materials. The major advantage of plastic injection moulding is that products with complex geometry can be made which is not possible in any other processes. As long as there is a need for plastic components of complex shapes and sizes, the business of manufacturing plastics will continue to grow.

The Company is dedicated to supplying products in a manner which meets the contractual requirements, that are delivered on time and with the ultimate aim of supplying zero defects.


http://www.dual-metallising.co.uk/

If you require any further information please call us on 0121 708 2748 where one of our friendly staff will be happy to help.

http://www.dual-metallising.co.uk/

How The Process of Plastic Injection Moulding Works

One of the most commonly used processes in the production of plastic items is the process most often referred to as ‘Injection Moulding’. There are several reasons as to why the process of plastic injection moulding is very popular, however one of the most common reasons given as to its popularity is the fact that as a means of goods production, the process can be used to produce enormous quantities of identically shaped plastic items of a variety of purposes. The goods produced by this process range from simple and disposable consumer goods to essential engineering components of high precision.

The Basic Process

In the most basic terms, the process of Plastic Injection Moulding involves the introduction of a certain material into the moulding machine (most typically via a ‘hopper’). The moulding machine is most commonly made up of a heated barrel (equipped with a reciprocating screw, usually driven by a hydraulic or an electric motor, which usually then feeds molten plastic into a temperature controlled split mould via a comprehensive network of gates and runners).

The polymer is melted by the reciprocating screw, which also then acts as a ram during the injection process. The shearing action of the rotating screw on the plastic assists in providing even more heat that can be utilised in this part of the process before the polymer is then injected into a mould which has been created in accordance to the required dimensions of the finished product desired by the client or customer. The pressure involved in the production process when the polymer is injected into the mould is extremely high, possibly even reaching 1000 atmospheres depending on the material being used in the process.

There are many companies and firms who specialise in producing important components and items made from plastic via the process of injection moulding. There is also a large number of companies which specialise in the production and supply of the moulds used in the injection moulding process.

The importance of the process of Plastic Injection Moulding is demonstrated by the fact that the service provided by the companies practising the process is in great demand by a considerable number of customers, including those in specialist industries such as aerospace and defence which require necessary specialist plastic goods and items produced by this process. The process is most commonly used in the production of the majority of thermoplastics such as polystyrene and nylon.

All our systems are fully automatic allowing for accurate repeatability throughout the process. Size capacities range from the smallest items to a maximum of 560mm x 960mm when rotating planetary , although it is possible to metallise larger items in certain circumstances.

http://www.dual-metallising.co.uk/

Dual Metallising Limited was established in 1982. We specialise in vacuum metallising, plastic injection moulding and spray painting. We offer different finishes for full production quantities down to single items.


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