Injection Molding Expertise - Worth its Weight in Gold

Posted by Matt Fehrmann on Feb 16, 2015 12:05:00 PM

blank.pngInjection Molding Expertise

It would be almost impossible to conceive of a world without plastic injection molded components. They turn up in just about everything we use, and most of us aren’t even aware of the amount of technical expertise that has been used to produce them. From the first glimmer of an idea to the production of the finished product, there is a chain of knowledge that has been incorporated into their design and manufacture. This process does not happen by chance; it is the culmination of many years of experience by highly trained and skilled designers and engineers.

Finding the right combination of injection molding experts under one roof is essential to successfully completing a production job. The molding company must be knowledgeable about the raw material, the variations in the molding machines, and the design of the mold. Every injection-molded component is different, and each has its own set of variables that the injection molding company must understand.

Material Selection

The choice of resins – and there are literally hundreds available – has to be determined by an evaluation of the conditions that the finished product will be exposed to, as well as the physical demands the product must meet. Electrical insulating qualities may be of prime importance, and close dimensional tolerance is always critical. When selecting an injection molding company as the supplier of plastic components, it is mandatory that the company has the expertise to satisfy the particular demand of the product in its final application. In too many instances the molding companies limit their suggestion of which raw material to use – not for what’s best, but instead to adapt to either the limitations of their machinery or to their limited knowledge of molding techniques required for different resins.

Tooling Design

Just as important as the selection of a molding company is the selection of a tooling design. It is tooling design expert who will have the combined knowledge of ensuring that the finished molded product will meet all the specifications required. Material flow, clamping force, sprue length and shape, cavity size and machine capacity are all factors that will affect the end product’s performance. The number of cavities within the mold is determined by the size of the production run and will have a direct proportional bearing on the cost. Molding experts will calculate mold flow studies for each resin to ensure that the finished molded component reaches its optimum level and imparts its own unique properties to the component.

Molded Part Finishes

As plastic injection molded parts are being used more and more to replace conventional materials, such as metal castings and forgings, the need to make them look like metal has become an important requirement. Shiny metal coatings or matte black enamel finishes are now standard on phones and cameras, and the injection molder must take into consideration the different molding techniques demanded by these variations in finish.

It is clear today more than ever that the selection of a modern progressive injection molding company is critical – and worth its weight in gold.

High-Temperature and Engineering-Grade Resins

Topics: Injection Molding