These ovens consist of an outer and inner shell separated by a space containing fiber or rockwool insulation. Inside, the ovens have thermostatically controlled heaters. Baffles and electric fans can also be used to ensure even heat distribution. Because of its relatively low molecular weight, acrylic sheet cannot be hung from a single edge. A clamping frame should be used for support and to facilitate sheet transfer to the forming station.
Horizontal units are also more flexible because either the heater or the tooling can be moved.
Working clearances can often be improved by moving the heaters, and systems can be designed to handle custom made blanks. When designing a horizontal heating system, independently controlled zones can be set up to improve control and flexibility. Thermoforming Machines Thermoforming machines are ideal when large volumes of the same shape are being produced. However, tooling costs are usually high. Multiple shapes can be formed at the same time from a single sheet.