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Introduction to Thermoforming Machines


Thermoforming Machine is a manufacturing thermoplastic sheet or film by thermoforming process.

Specifically, it is more of a converting process, where plastic sheet or film is converted into a formed, finished part. The sheet or film is heated in an oven to its forming temperature, then stretched into or onto a mold and cooled. Early generation thermoforming machines usually incorporated cal-rod type heaters, similar to heating elements found in conventional electric kitchen ovens.

These are still used, but more modern equipment frequently uses quartz heaters or radiant-panel heaters for more efficient sheet heating and ease of zone control. Cast or machined aluminum is the most common mold material, although epoxy, wood and structural foam are sometimes used for prototypes, samples, and low volume production runs.

Thermoforming differs from injection molding, blow molding, rotational molding, and other forms of processing plastics, and is primarily used in the manufacture of disposable cups, containers, lids, trays, blisters, clamshells, and other products.

A thermoform machine can utilize vacuum only, or vacuum combined with air pressure, in the forming process. It can be as small and simple as a table-top sample former where small cut sheets of material are placed into a clamp and heated and formed, or as large and complex as a complete inline extrusion, thermoforming, trimming, granulating, and material handling system for continuous high-speed production.

References: Wikipedia : Thermoforming

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