| 摘要 |
A method for continuously producing expanded thermoformable materials comprising the steps of: conveying a thermoformable assembly (38) by means o f a conveyor (22) through a plurality of heating zones (26), whereby the thermoformable assembly (38) is heated to a temperature at which the thermoformable material (48) adhesively bonds to the first and second mold plates (40, 42): disposing the thermoformable assembly (38) between an upper press plate (44) and a lower press plate (46), and heating the thermoformabl e material (48) to a temperature in the range between about 50~ to 300~ C whil e moving the upper and lower press plates (44, 46) so as to effect an expansio n of the cross-section of the thermoformable material (48); and conveying the expanded thermoformable material (48) through a cooling zone (34), wherein t he expanded thermoformable material is cooled to a temperature sufficient for maintaining its structural integrity. |
