... Acrylic,ps,plastic *make light box ,LED letter semi-automatic plastic vacuum forming machine 1.Do not have upper and lower die ... making provincial labor and material, directly to the acrylic plate on top of the machine the mold, heating, softening, plastic, cooling, an automatic ... .5. Pneumatic door of heating box, energy saving and high efficiency.6. 2 indivicual heating boxes, single work and ...