... Acrylic,ps,plastic *make light box ,LED letter vacuum forming machine for acrylic 1.Do not have upper and lower die ... acrylic plate on top of the machine the mold, heating, softening, plastic, cooling, an automatic shape.B. Automatic control, temperature plastic, ... arylic lighting letters etc.2. Strong structure of machine body, made of steel completely, more stable and durable.3. Integration functions ...