Plastic Fabrication Services in Washington | Since 1977

Hill Plastics works with a broad range of thermoplastic sheet materials including ABS, High-Density Polyethylene (HDPE), PETG, High-Temperature ABS, UV-Resistant ASA/ABS, Polystyrene (PS), KYDEX, and decorative foil-laminated materials. Material selection is guided by evaluating cost, impact requirements, durability, tensile strength, chemical resistance, and environmental conditions specific to your application.

Hill Plastics serves a wide range of industries including aerospace and aviation, telecommunications, medical devices and healthcare, industrial equipment and OEM manufacturing, defense and military, point-of-purchase retail displays, marine, electronics, oil and gas, and transportation and logistics. Their long-standing client base includes companies like Southwest Airlines, CommScope, Pearson Medical, and LifePort.

Yes. Hill Plastics supports the full production lifecycle — from low-cost wood or polyurethane prototype tooling that can be ready in just a few weeks, through to high-volume production using their 4'x7' rotary thermoforming machine, which runs 2.5 times faster than standard single-station equipment. Their 20,000+ sq. ft. facility is equipped to handle any production scale efficiently.

Prototype lead times at Hill Plastics depend on part complexity, but a wooden master pattern CNC-milled to print specifications can typically be produced in just a few weeks. Once the pattern is mounted on a mold base, prototype parts can follow shortly after. This rapid prototyping approach allows for design review, fit evaluation, and functional testing before committing to full aluminum production tooling.

Thermoforming is the broader process of heating a plastic sheet to a forming temperature and shaping it over a mold. Vacuum forming is a specific type of thermoforming where a vacuum removes air between the mold and the softened sheet, pulling it tightly into shape. Hill Plastics uses both methods across eight machines, supporting everything from thin-gauge detail work to heavy-gauge industrial parts.

Yes. The Hill Plastics sales and engineering team — Brad Hill and Cody Hill — provides hands-on assistance with product design, material selection, and tooling recommendations. They work with customers from the initial concept stage through to finished parts, ensuring the right design and material choices are made to meet performance requirements, minimize tooling costs, and support a smooth transition from prototype to production.

Hill Plastics operates two 5'x10' CNC trimming centers for primary and secondary trim operations, along with routing machinery, punch presses, table saws, and panel saws. Using SolidWorks for CAD design and CNC interface, the team performs contour cutting, precision drilling, edge finishing, fastener preparation, heat bending, bonding, riveting, and threaded insert installation to produce assembly-ready parts to exact drawing specifications.

Hill Plastics employs a custom quality control system that monitors production progress at every stage — from tooling and forming through trimming and final inspection. Production parts are evaluated against appearance and print specifications to ensure dimensional accuracy and consistency. With staff averaging over 20 years of industry tenure, quality oversight is embedded throughout the manufacturing process, from prototype approval to high-volume fulfillment.