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Twin Sheet Thermoforming

A reliable source for Twin Sheet Thermoforming information and leading Twin Sheet Thermoforming Companies & Suppliers.

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…

Twin Sheet Thermoforming Twin sheet thermoforming is the process of pressure forming or vacuum forming two sheets of plastic. Essentially simultaneously, with a separate mold on the top and on the bottom.
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Leading Manufacturers

Greeneville, TN  |  423-638-1284

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.

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Valk Industries, Inc. $$$

New Milford, CT  |  860-354-0885

For over 40 years, Conlet Plastics has been a leader in vacuum 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.

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Conlet Plastics, Inc. $$$

Lake Bluff, IL  |  847-604-5100

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 products are manufactured with great attention to detail. ISO 9001:2008 certified.

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Profile Plastics, Inc. $$$

Stirling, NJ  |  908-647-3500

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 includes all types of machining & assembly.

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Engineered Plastic Products, Inc. $$$

McSherrystown, PA  |  717-633-6333

Founded in 1986, SAY Plastics is a plastics processor specializing in OEM thermoforming. Our state-of the-art facility, located in South Central Pennsylvania, houses the latest manufacturing technologies. From our computer controlled forming equipment and our vacuum molding capabilities, to our brand new high speed CNC Routers, SAY Plastics has the tools for your next project. Our team will work with you every step of the way to ensure quality service every time.

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SAY Plastics, Inc. $$$

Danville, IL  |  (844)865-1669

Greenwood Plastics Industries is an industry leader has been a leader in vacuum formed plastics for many years. We believe in relationships that can produce smart productivity. You give us the idea, and we will help you choose the best materials, process and timeline to make a high quality and profitable product. We are also committed to earth friendly-green solutions. Recycling as much as possible has been a company initiative for year and we are taking big steps at reducing our carbon footprint.

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Greenwood Plastics, Inc. $$$

Coleman, MI  |  877-465-4055

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.

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Robinson Industries $$$
placeholder image Valk Industries, Inc. Conlet Plastics, Inc. Profile Plastics, Inc. Engineered Plastic Products, Inc. SAY Plastics, Inc. Greenwood Plastics, Inc. Robinson Industries

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.

Twin Sheet Thermoforming Informational Video

 

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