Plastic Injection Molding

Our mission at Cary Products is to provide our customers with high quality, cost effective plastic injection molded components and assemblies.

Cary Products is a plastic injection molding manufacturer, and is well known by consumers and other plastic molding companies as a high quality molder. We work to transform a customer's design into a finished product through over 60 years of experience. By working very closely with our material suppliers Cary Products has been able to offer its customers superior plastic injection molded products to replace heavy non-insulative metal parts. Often molded parts can be designed to replace several metal parts with a single plastic part reducing purchased components and assembly cost.

Plastic injection molding is a manufacturing process that makes possible the production of highly finished and detailed plastic articles at very high repeatable production rates under high tolerances. The basic injection molding machine uses a hopper to feed the granular plastic particles into a heated barrel or unit that makes the plastics in a molten state. The heated barrel has a reciprocating screw-like plunger that in turn pushes the molten plastic under hydraulic or electric/mechanical force into the cavity(s) of a closed together mold that forms the designed part. The closed mold is held closed under high force during the injection and cooling of the molten plastics by either a mechanical toggle mechanism, or by a large hydraulic cylinder or by a combination hydro-mechanical toggle mechanism. The mold is cooled by controlled temperature water circulated through each of the mold halves. Upon opening the mold by the machine clamping mechanism the part is ejected out of its part cavity(s) and the mold is closed again to repeat the process over again at a rapid rate. It requires the skills and mastering of four basic control parameters: temperature, time, pressure and cooling of the heated-molten plastics being injected into a mold cavity(s) that forms the desired part. The decision to molding a part is based on its design complexity, mold cost, selective plastics, and processing equipment required to make the part.

In short, one must make the determination by justification for a product that it has high enough in volume in its end use marketplace application that enables the cost of tooling a new tool and processing to be surpassed. Often times the volume, cosmetics and design complexities of the part may dictate the level or grade of a tool to be made out different grades of steel and/or the use of aluminum in mold bases and in cavity inserts can help control cost. The expected tool longevity is also a factor in consideration as well.

There are many plastic processing machines use and designed specifically to make a particular shaped part for a selective plastic material at its lowest effective cost. To name a few there are extrusion, thermoforming, blow molding, compression molding and various combinations of injection molding. Various injection molding process are gas-assisted injection molding, co-injection molding, insert injection molding, microinjection molding, microcellular molding, reaction injection molding structural injection molding, injection of liquid silicone rubber molding, etc. Once a product recommendation for processing method by plastic injection molding and the plastic material has been chosen to achieve best performance, its designed purpose and for its chosen application the product can be designed into a CAD model for reviews and prototyped for further studies and testing. This is followed by the mold design for that particular chosen plastics and tooling of the mold itself.. Among these plastics use by different processes are basically and widely use thermoplastics and thermosetting plastics. The selection is based on the products application, end use in strength, temperature range in its endurance, product life expectancy and cost of the plastics. The selection of the plastic material is a critical part of the design of the part.

Thermoplastic injection molding has been the heart of Cary Products Company for 60 years in the Dallas-Ft. Worth area. It has allowed Cary Products the flexibility to meet what customers have demanded at competitive prices, highly quality product with on time delivery. With over a hundred years of experience our staff we will be more than able to recommend the best criterions to achieve your objective(s) for a quality product at the best competitive price.

Cary products has 33 plastic injection molding machines with 716 tons capacity. We specialize in full customization of your molds. Custom colors, custom engineered resins and more. We are professionals in many injection molding services including prototyping, tool transfer, vacuum metallizing, metal to plastic conversion, and more.

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