Method for printing of three-dimensional objects
A method for forming three-dimensional objects is disclosed. The method includes printing building material, layer by layer, to form a three dimensional object by depositing building material in layers onto a printing tray to form a three dimensional object and maintaining the uppermost layers being deposited in a flowable state by a temperature control after layers below the uppermost layers are solidified.
1. A method for printing a three-dimensional object comprising:
depositing from an inkjet printing head ultraviolet-curable (UV-curable) photopolymer liquid building material in layers onto a printing tray; and
repeatedly radiating UV radiation toward the printing tray to cure and solidify the deposited ultraviolet-curable (UV-curable) photopolymer liquid while controlling temperature of upper deposited layers, the printing tray and surrounding air to above the glass transition temperature of the cured UV-curable photopolymer building material.
2. The method of claim 1 comprising:
heating the printing tray to above and near the glass transition temperature of the cured UV-curable photopolymer building material.
3. The method of claim 1 , wherein controlling temperature of the upper deposited layers comprises operating heating elements according to reading received from a temperature sensor.
4. The method of claim 1 , wherein controlling temperature of the upper deposited layers comprises operating cooling elements according to reading received from a temperature sensor.