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Plastic Injection Molding In China

Jan 4th 2016 at 11:21 PM

Injection molding is a type of manufacturing process in which parts are produced by injecting heated materials such as rubber, molten metal, glasses, plastics, elastomers or thermosetting polymers into a mold. The major components of injection molding include, the injection molding machine, raw material and a mold. When the raw material is plastic, then the manufacturing process is referred to as plastic injection molding. Injection molding is perhaps one of the most commonly used methods to manufacture and fabricate plastic parts globally. Countless plastic products which vary greatly in shape, size and applications are manufactured using plastic injection molding.

China plastic injection molding companies produce high quality molds which can be as good as those made from American and European companies. Due to high competition in terms of price and quality, many plastic injection makers from Europe and America have moved some or all of their injection molding operations over to China, or have partnered with a China injection molding provider.

Over the past few years, Chinese plastic manufactures have trained thousands of engineers who are continually improving to match western quality standards. Technical prowess along with mold making experience are two key factors when it comes to producing a quality tool and Chinese mold makers and sales men are very good at material choosing, CAD drawing and the mold making process. As such they are much better at guiding the customer through the injection molding process, to proactively help with any potential pitfalls.

The process of injection molding is very simple and normally takes between 2 seconds to 3 minutes and consists of five major stages namely CAD modeling, clamping, injection, cooling and ejection. In the first stage also known as CAD modeling, the new product to be manufactured is modeled using either 2D Or 3D modeling. This is done using computer program such as AutoCad. Once the product part is designed, it is run into the injection molding machine using a program logic control unit.

The second stage of injection molding also known as clamping involves attaching or clamping the mold into the injection machine. This hydraulically powered machine keeps the mold firmly attached by exerting sufficient force that maintains the mold in position as material is being injected. In the injection stage, the raw material in the form of pellets is then fed into the injection molding machine. During this process the plastic material is melted using heat and pressure into a molten plastic which is then injected into the mold where the built up pressure holds the material. The fourth stage involves cooling the molten plastic thereby allowing it to solidify into the shape of the desired part. Once the cooling is sufficient, the cooled material is ejected from the mold using the ejection system.

Injection molding is used in the manufacturing of thin-walled plastic parts used in plastic housing. Plastic housing finds wide range of applications which includes household appliances, power tools, automotive dashboards and consumer electronics. Other common products produced by leading China plastic injection mold making company using plastic injection molding technology include, buckets, toothbrushes, plastic toys and medical devices such as valves and syringes.

If you are looking for china precision machining services, the author of this article recommends HLH Prototypes.


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