WELCOME TO THE MOST INFORMATIVE AND COMPREHENSIVE PLASTIC WEB SITE ON THE WEB
WELCOME TO THE MOST INFORMATIVE AND COMPREHENSIVE PLASTIC WEB SITE ON THE WEB
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Rotary ThermoformingRotary thermoforming is used for applications requiring high production rates. used machines are three station and four station thermoformers Clamp frames are mounted on a rotating table, and indexed through a load-unload station. one or two oven stations and a Forming station. Because the multiple stations permit all of these basic phases to be carried out simultaneously, production cycles are much better than with the single station thermoformer. The rotaries are almost never used for package-type applications. but are put to work on heavy gauge sheet. Top and bottom ovens are available, and a top mold base or platen is generally provided for plug assist or other techniques. Production rates are increased because there are 2. 3. or 4 sheets in the forming process at the same time. A three station rotary will have approximately the same output as a shuttle thermoformer with two molds. A rotary thermoformer with two heat stations (4 or 5 station rotary) will operate at significantly higher production rates. Generally, the production rate of shuttle and three station rotary thermoformers is limited by the time necessary to heat the sheet for forming temperature. Rotary thermoformers with two heating stations are
designed so the sheet is uniformly preheated in the preheat station and
subsequently heated to forming temperature in the second heat station. This
divides the heating load between two separate sets of heaters. With this process
design. Two heat station thermoformers are usually cooling-time limited instead
of heating-limited. Therefore, the production rate is limited by how long if
takes the pan to cool after forming and before unloading. Rotary Thermoformers Station Three Four Five Number Station Station Station 1 Load/Unload Load/Unload Load 2 Heat Preheat Preheat 3 Forming Heat Heat 4 -- Form Form 5 -- -- Unload
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