The Basics of Manufacturing Plastic

How Modern Thermoforming Creates Precision Plastic Components

Manufacturing plastic can involve many different processes and methods, but collectively they form the backbone of countless products we rely on daily, from automotive components to medical devices and beyond. At Allied Plastics, we’ve spent over three decades perfecting the art and science of plastic manufacturing, with a specialized focus on thermoforming technology that delivers exceptional results for demanding industrial applications across multiple sectors. 

Looking for a manufacturing partner with proven expertise in custom plastic components? Schedule a consultation with our team to discuss your project specifications.

Core Plastic Manufacturing Methods

Several techniques dominate the plastic manufacturing industry, each with specific advantages for different applications. While injection molding involves injecting molten plastic into molds under high pressure, and blow molding creates hollow objects by inflating plastic within a mold, thermoforming stands apart for its unique capabilities.

Thermoforming, Allied Plastics’ specialty, involves heating plastic sheets until pliable, then forming them over molds using vacuum or pressure. This process excels in creating large components with complex geometries, offering significant cost advantages for medium to large production runs. With substantially lower tooling costs than injection molding, thermoforming provides an economical choice while maintaining excellent quality and design flexibility.

The Thermoforming Process Explained

The thermoforming process begins with precision-cut plastic sheets that are heated to a specific temperature where the material becomes pliable without melting. These softened sheets are then formed over custom molds using vacuum pressure, air pressure, or a combination of techniques depending on the specific requirements of the part.

At Allied Plastics, our advanced capabilities push the boundaries of what’s possible with thermoforming. Our facility houses equipment capable of handling impressively large parts — up to 9 feet by 14 feet — with draw depths reaching 60 inches. This capacity is complemented by a dozen 5-axis CNC machines and five robotic trimming systems that ensure precise, repeatable finishing of even the most complex geometries.

Material Selection is Critical in Manufacturing Plastic

The choice of material significantly impacts the performance, durability, and cost of plastic components. Thermoforming accommodates a wide range of industrial-grade materials, each offering specific advantages for different applications.

Allied Plastics works with diverse materials, including High-Density Polyethylene (HDPE) for excellent chemical resistance, Thermoplastic Polyolefin (TPO) for outstanding weathering properties, Acrylonitrile Butadiene Styrene (ABS) for superior formability and impact resistance, and various grades of Polypropylene and Polystyrene. Our expertise spans material thicknesses from .060″ to .550″, accommodating various structural requirements while incorporating different surface textures directly into the forming process.

From Design to Finished Product with Allied Plastics

Modern plastic manufacturing begins long before the first part is produced. The process starts with comprehensive engineering support, where experienced designers work alongside customers to optimize parts for both performance and manufacturability.

Allied Plastics offers a truly integrated approach, with in-house capabilities spanning the entire production process. From engineering and plastic sheet extrusion to thermoforming, finishing and assembly, and more, we handle every aspect under one roof. This approach ensures quality control at every step, while eliminating the logistical challenges and potential inconsistencies of working with multiple vendors.

Thermoforming plastic delivers a powerful combination of benefits: cost-effectiveness at scale, design flexibility, material versatility, and consistent quality. As manufacturers continue to seek efficient, reliable production methods, thermoforming stands out as a solution that delivers both performance and value.

Whether you’re developing new products or optimizing existing ones, understanding these manufacturing basics helps you make informed decisions. For more information about how Allied Plastics’ thermoforming expertise can benefit your specific manufacturing needs, contact our team today.

Back to News