What are Plastic Injection Parts?

Injection molding is a manufacturing process that produces parts by injecting molten material into a mold. A variety of materials can be used for injection molding, these materials mainly include metal, glass, elastomers, candy and the most common thermoplastic and thermosetting polymers. The material of the part is fed into a heated barrel, mixed (using a spiral screw), and then injected into the mold cavity, where it cools and hardens the shape of the molding cavity.

The parts to be injection molded must be very carefully designed to facilitate the molding process; the material used for the part, the shape and characteristics of the part required, the material of the mold, and the performance of the molding machine must be considered. The wide range of design considerations and possibilities promotes the versatility of injection molding.

The following knowledge points are listed below:

(1) What is an injection mold?

(2) Applications of injection molds

(3) How does injection molding work?

What is an injected mold?

An injection mold is a tool made up of a series of parts that allow molten plastic to be formed and cooled in a manner that forms discrete part shapes.

Applications of injected molds

Injection molding is used to make many things, such as spools, packaging, bottle caps, car parts and components, toys, pocket combs, some musical instruments (and parts thereof), one-piece chairs and small tables, storage containers, mechanical parts (including gears) And most other plastic products today. Injection molding is the most common modern method of manufacturing plastic injection parts. It is ideal for producing large quantities of identical objects.

Injection molding is used to produce plastic injection parts for various applications, the most common of which is plastic housing. Plastic shells are thin-walled shells and usually require many ribs and bosses inside. These housings are used in a variety of products, including household appliances, consumer electronics, power tools, and as automotive dashboards. Other common thin-walled products include different types of open containers, such as barrels. Injection molding is also used to produce everyday items such as toothbrushes or small plastic toys. Many medical devices, including valves and syringes, are also manufactured using injection molding.

How does injection molding work?

Generally, plastic injection parts are formed in the form of pellets or pellets and are sent in the form of paper bags from raw material manufacturers. Through injection molding process, the pre-dried granular plastic is fed from the hopper into the heated barrel through a forced plunger. When the particles move slowly forward through the screw plunger, the plastic is forced into the heating chamber and melted in the heating chamber. As the plunger advances, the molten plastic is forced to pass through a nozzle resting on the mold, allowing it to enter the mold cavity through the gate and runner system. The mold remains cold, so the plastic solidifies almost after the mold is filled.

The thermoplastic injection molding process is a standard process involving aluminum molds, and no heating or cooling lines pass through, which means the cycle time will be longer. It allows our molders to monitor filling pressure, decoration issues, and the basic quality of parts.

The resin pellets are put into the barrel, and then they are finally melted, compressed and injected into the runner system of the mold. The hot resin is injected into the mold cavity through the gate, and then the part is formed. The thimble helps to move the part out of the mold and into the loading bin. After the run is complete, the parts (or initial sample run) are boxed and shipped shortly after.

Plastic injection parts, which are also called the injection molding parts are very useful. Our company provides various injection molding parts. We adhere to the management policy of "quality first, service first, continuous improvement, innovation to satisfy customers", and "zero defects, zero complaints" as the quality goal. In order to improve our services, we produce high-quality products at reasonable prices.

If you are interested in buying plastic injection parts, Metal Fabrication， Casting Parts please do not hesitate to contact us.