Vacuum Forming/

Pressure Forming

Pressure forming is a specialized type of vacuum formingthat uses both negative airflow and positive air pressure to createdetailed plastic components. Also known as blow forming, this uniqueprocess is used as an alternative to injection molding and structuralfoam molding. With pressure forming, products of equal or greaterquality are produced in less time, with sharper edges, more productionflexibility and at a lower price.

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Valk Industries, Inc.
Greeneville, TN
423-638-1284
Valk Industries provides engineering and manufacturing of quality products and services, including their superior pressure forming. Operations began in 1975 and Valk has expanded from providing custom machining and fabrication processes to over wrapping, component assembly and packaging products which include poster tubes and shipping tubes. Valk is committed to quality, service and reliability.
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Conlet Plastics, Inc.
New Milford, CT
860-354-0885
For over 40 years, Conlet Plastics has been a leader in pressure forming. They serve a wide variety of industries including medical, airline, automotive and signage, with high-quality products that are reasonably priced & delivered on time. They are fully equipped for prototypes or production of many kinds of blister packs. They also offer in house tooling capabilities.
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Asheville Thermoform Plastics, Inc.
Fletcher, NC
828-684-8440
At Asheville Thermoform Plastics, customers are insured the highest quality of products and services, such as their first-rate pressure forming services, in which a team of experienced and talented people cut no corners in expertly manufacturing exactly what you need. Asheville's products can be designed to fit your specific applications and requirements. Contact them today!
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InterTrade Industries
Huntington Beach, CA
800-944-9277
InterTrade Industries is a thermoforming manufacturer in Southern California that offers pressure forming, prototyping/solid modeling, in-house RFID labeling and inline forming of plastic parts. We keep costs to a minimum and have one of the shortest lead times in the industry. Our experts are at your disposal to help design and manufacture the best thermoplastic for your product.
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Engineered Plastic Products, Inc.
Stirling, NJ
800-304-3774
For over 40 years, EPP has been providing pressure forming services to customers such as NASA, Boeing, Lockheed Martin, Beckton Dickinson & the U.S. Postal service. This commitment to customer service in all phases of manufacturing from design to engineering to production is why they have considerable recognition as an outstanding source for formed & fabricated thermoplastic products.
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Packateers, Inc.
West Chester, PA
800-353-4750
Packateers, Inc. was originally created in 1963 as an engineering/sales firm for blow-molded and plastic extruded products. Over the years they have expanded their product line to include a wide range of superior products and services, such as pressure forming, in addition to vacuum and injected molded parts, custom, printed and stock bags and cases for all uses.
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Industry Information

Pressure Forming

When pressure forming is being utilized, product turn around can be as brief as a few seconds per part depending upon the specific materials and densities required. Common products produced in this economic way include shrouds, covers, equipment housings, bezels, bases, internal parts and components for computers and peripherals. Industries such as telecommunications, medicine, electronics, instruments, automotive and more frequently use this type of forming for small or medium production runs. Though pressure forming can be used in large runs, the molds are not as durable as those used in alternative methods. Nevertheless, pressure forming is a popular technique as it offers greater precision and improved retention and definition of shape in the mold. Pressure forming can be used to achieve undercuts when necessary as well as multiple textures in a single object making it ideal for complicated or multi-part assemblies.

The process behind pressure forming begins much like traditional thermoforming processes. A sheet of plastic, most commonly ABS, acrylic, PVC or polycarbonate, is attached to a frame or set of guiding chains which feed it into a heater. Using infrared, electric or natural gas the sheet is heated until it becomes soft and pliable. The time and temperature vary considerably based on the specific properties of a given polymer as well as the thickness of the sheet which ranges from 0.0375 inches to 0.093 inches. When thoroughly heated, the sheet is guided into a form station which holds the mold. The mold is usually female or concave in shape and is the inverse of the desired shale and detail of the final product. Similar to other vacuum forming processes vacuum pumps remove the air between the mold and the plastic, pulling the sheet into the mold. In pressure forming, compressed air is also directed at high pressures toward the side of the sheet opposite the mold. This creates up to five times the pressure of regular vacuum forming and creates a much better mold adherence, or the tightness of the mold to the sheet. Sheets take on the specific form of the mold as they are cooled and dried in place until rigid. Reverse airflow on the mold side of the form station is often needed to eject the finished part.

Pressure Forming
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