After the plastic is molded, the plastic remains in the molds and while still at forming temperature, the two molds are brought together under high pressures, which causes the two sheets to weld together wherever a weld is dictated. While being pressed together, a pin is pushed through one of the sheets and air is blown in which causes the sheets to be pressure formed, if the air were trapped within, the panel would collapse. Finished products are hollow and have molded features on both sides, they are also attractive, structurally rigid and detailed. Read More…
Valk’s policy is “to meet or exceed our customer’s requirements, working together as a team with honesty and integrity.” Valk’s success is due to their long standing focus on quality & customer service.
Since 1960, Profile Plastics Inc. has been at the forefront of thermoforming technology. Utilizing the latest software and technology, our expert staff of engineers can design custom vacuum, pressure, and twin-sheet thermoformed solutions. Over the last 60 years, we have developed a process that allows us to deliver consistent, high volume, and precise products with superior quality. Our high...
Quality Plastics has been a leading manufacturer of vacuum forming since 1976. Whether you need a small batch of custom vacuum-formed parts or a large-scale production run, we have the capabilities and expertise to deliver. We are committed to providing our customers with exceptional vacuum-formed products and services that meet their needs and exceed their expectations. Contact us today to learn ...
Engineered Plastic Products custom forms & fabricates sheet thermoplastic materials, standard & specialized, for any number of industrial & commercial requirements. EPP has been widely recognized for outstanding manufacturing & service since 1958 for companies such as GE, NASA & AT&T. Custom fabricated parts can be as large as 72"x108" down to 2"x2" in any thickness up to 1 1/2". Post-forming...
At Lerner Molded Plastics, we specialize in crafting high-quality vacuum-formed products tailored to meet the diverse needs of our clients. With years of expertise in the industry, we take pride in our ability to deliver innovative solutions that exceed expectations.
At Duo Form, we are pioneers in the realm of vacuum-formed plastic products. With a collective passion for precision engineering and creative problem-solving, we've established ourselves as leaders in delivering high-quality solutions to a wide range of industries.
Robinson Industries offers thermoformed and injection molded reusable, heavy duty plastic pallets, packaging and more. We are one of the largest suppliers of reusable pallets to many industries.
More Twin Sheet Thermoforming Companies
Parts can be made of dissimilar materials with twin sheet thermoforming.
Twin sheet processes create a 3-dimensional part with formed features on both sides. Parts are able to use a thick sheet on the outside for stability and use a thinner sheet on the inside for rigidity. When considering thickness, it is smart to make sure the difference in depth between the bottom and top sheets be 0.0625 of an inch or less. A variance greater than that number would make the twin-sheets at risk of being out of sync.
Since the two sheets can be dissimilar, twin-sheet forming allows for a two-color product option and custom coloring. To form two sheets instead of one, both sheets must be precise and properly aligned. Complete understanding and control of conditions are required, as well as the appropriate vacuum and cooling devices.
Advantages of twin sheet thermoforming include:
• Ability to add internal reinforcements such as rigid foam components
• Twin sheet forming has increased structural stability
• Can have molded in attachments
• Allows for air and wiring ducts
• Can accommodate multiple textures with variable wall sizes
• Ability to control both sides of the part
• Lower tooling cost than competitive processes
• No secondary bonding required
• Improved aesthetics caused by tool contact on both sides
• Formable in multiple materials and sizes
Different types of twin sheet machinery may be required for specific applications. This can be dictated by:
• Material gauge
• Material type
• Material heating to cooling ratio
• Material hot melt strength
• Bonding properties
• Material shrink
• Part size
• Part design
• Amount of pressure required
Twin sheet thermoforming materials can include, thermoplastic polyolefins (TPO) which has high impact resistance, acrylonitrile butadiene styrene (ABS) has good impact and chemical resistant properties, high density polyethylene sheets (HDPE) has high impact strength and is used for industrial products, high impact polystyrene (HIPS) is lightweight and inexpensive, acrylic carries a great shatter resistance along with weather resistance.
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