... make light box ,LED letter semi-automatic plastic vacuum forming machine 1.Do not have upper and ... top of the machine the mold, heating, softening, plastic, cooling, an automatic shape.B. Automatic control, temperature ... sheet & compress & sucking by vacuum & blowing, so to make any shapes of acrylic workpieces ... energy saving and high efficiency.6. 2 indivicual heating boxes, single work and double ...