Precision Injection Molding

Injection molding is a production method for making parts from plastic product. Molten plastic is injected at high pressure into a mould, which is the inverse of the desired shape. The mould is made by a mold maker from metal, typically either steel or aluminium, and precision-machined to form the functions of the preferred part. Injection molding is really widely used for manufacturing a range of parts, from the smallest part to whole body panels of automobiles. Providers used by suppliers of precision injection molding include bonding, design assistance, graphics, tool or mold making, prototype or market entry molding, low volume production, high volume production, micro molding, big part molding, insert molding, two-shot injection molding, marking services, assembly services, just-in-time capability, and packaging and shipping.

Precision Injection Molding

Precision injection molding

Nowadays, precision injection molding is ending up being progressively essential. One factor for this is the increased performance requirements of the finished rubber parts. In addition, increasingly more manufacturers of rubber parts are seeing the benefits in the high level of automation and performance. Injection molding innovation, utilizing liquid rubber, integrates the speed, expense performance, and adaptability of plastic injection molding with the exceptional properties of silicone rubber. It is utilized in many applications where natural rubber can not carry out, such as military, aerospace, vehicle, health care applications, and so on. The use of silicone rubber combines the residential or commercial properties of resilience, high temperature stability and inertness as silicone is usually untouched by temperature levels from 100 degrees Fahrenheit to 450 degrees Fahrenheit. Progress offered by Mold China co.,Ltd in precision injection molding innovation has made quicker cures possible, enabling system expense decreases.

Some typical molding issues and their remedies


Swelter is early vulcanization of the rubber, prior to the flow of rubber in the mould is finished. The bad mould flow leads to distorted or incompletely formed parts. To avoid or remove blister, see that the mould is totally filled before the rubber begins to vulcanize. Ensure that the mould cavity is evenly warmed.


This is distortion of the molded item at the mould parting line usually through a torn or a rough imprint. Backrinding is usually triggered due to unexpected release of internal pressure within the part when the mould is opened. So to avoid it ensure there is no roughness or excessive opening at the mould parting line and keep the molding temperature level as low as possible for the vulcanizing representative utilized.

Precision Injection Molding

Entrapped air

Air entrapped in the mould or the rubber may produce soft, tarnished areas in the surface or in the random sample of the molded part due to incomplete vulcanization. Solutions consist of

– Bump the mould

– Increase the quantity of vulcanizing agent.

– Use a high temperature-vulcanizing agent that is less reactive with air.

– Vent the mould at sharp corners and undercuts.

Surface discoloration

This generally results from excess develop of mould release representative in the mould cavity, or from excessive dust or dirt in the preform. To avoid it clean the mold as frequently as needed and keep the preforms tidy. Usage release agents sparingly.