About Plastic Injection Molding

The plastics industry is one of the fastest growing major industries in the world. Every year there is an increase in the amount of plastics used in all types of products. A good example of this is the percent of plastics used in today's automobiles compared to 15 years ago.

The plastics injection molding field, at large, is volume oriented. Vendor sources, particularly mold makers and custom molders, are geared to long tool life and high volume production. Plastics equipment manufacturers, likewise, have concentrated almost exclusively on fully automatic, sophisticated injection molding machines whose economics lie in single runs of 100,000 parts or more and in multi-shift operations.

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The continued rate of growth in the industry hinges on the development of improved and new thermoplastics with greater physical properties. This has opened the door to applications never thought possible before. These are emerging both as product innovations and as existing products converted from materials such as metal, glass, wood or paper to plastics for competitive and economic advantage.

Theory of injection molding

The theory of injection molding can be reduced to four simple individual steps: Plasticizing, Injection, Chilling, and Ejection. Each of those steps is distinct from the others and correct control of each is essential to the success of the total process.

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Plasticizing - describes the conversion of the polymer material from its normal hard granular form at room temperatures, to the liquid consistency necessary for injection at its correct melt temperature.

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Injection - is the stage during which this melt is introduced into a mold to completely fill a cavity or cavities.

Chilling - is the action of removing heat from the melt to convert it from a liquid consistency back to its original rigid state. As the material cools, it also shrinks.

Ejection - is the removal of the cooled, molded part from the mold cavity and from any cores or inserts. Repetition of these basic steps in sequence is the process of injection molding.

Custom injection mold making-perfection from the start

Engineering expertise in custom injection mold making is what makes the difference in creating plastic parts that meet your exacting requirements. New Century engineers are specialists in mold making for intricate and complex pieces that require high finishing.

Bringing complicated molds to reality

New Century engineers apply new vision and industry experience to every mold design. Then, from CAD designs, machinists tool flawless molds-regardless of their complexity, capable of producing millions of consistent, high quality parts for your specific application.

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Protoypes save time and money, and ensure perfect results

A prototype is produced from each New Century mold and tested within its intended application. So you know before production begins that your plastic piece is precisely right for your needs - not down the line when adjustments cost precious time and money.

3-D samples from your own ideas

If your product concept requires custom injection mold making to help get it off the ground, bring us your 2-D ideas, and we'll turn them into 3-D reality with rapid prototyping. New Century engineers can produce one or two 3D samples from CAD drawings. Rapid prototyping is accomplished through laser sintered epoxy, stereo lithography (SLA) or 3D plotter. A small production run (20 max.) is also possible using rubber test molds. From aluminum test molds, we can produce a run of several thousand depending on the plastic used.

Getting your product to market faster

No matter what the project, New Century is sensitive to critical timelines, and makes every effort to design and construct a mold as efficiently as possible, enabling you to bring your product to market in timely fashion.

Check out samples of our work, including CLEANING SERIES, to see the many types of industries that count on New Century to provide custom plastic injection mold making services.

Engineering expertise in custom injection mold making is what makes the difference in creating plastic parts that meet your exacting requirements. New Century engineers are specialists in mold making for intricate and complex pieces that require high finishing.