Plastic Molding Manufacturers

Plastic Molding Manufacturers and Companies

Plastic Molding Processes

Plastic processes differ greatly in both the way they form plastic products and in the shape and structural integrity of the products they manufacture. Blow molding, for example, is nearly the sole method by which plastic bottles for beverages, household cleaners, and cosmetic products are made, as well as a range of low-cost toys and parts with low to medium performance. The extrusion process creates linear profiles, strips, and sheets with high structural integrity useful in many construction siding, trim, and furniture applications. Vacuum forming, or thermoforming, forms trays, linings, and thin plastic packaging from heated plastic sheets, while dip molding forms a variety of soft molds and plastic coatings. Other plastic molding processes use casts, or dies; injection molding squeezes melted (or “plasticized”) plastic resin into a closed mold, forming a solid plastic object, while rotational molding uses a type of gyroscope to evenly coat the inside of a mold, creating hollow parts with high impact resistance.

Plastic molding processes vary greatly in cost. High-end plastic molding processes, such as rotational molding and injection molding, provide precision three-dimensional plastic parts with structural integrity and impact resistance a few other processes or materials can provide. On the other end of the spectrum, blow molding and dip molding processes offer very affordable options for long runs and mass production of containers and household commodity items. A wide range of plastic materials is molded through these processes, although some processes are more effective with certain polymers than others.