Method and device for producing 3D shaped parts using layering technology, and controllable powder roller

A method for producing one or more three-dimensional parts comprising the steps of:

• applying a layer of a particulate material onto a construction field,
• selectively applying an absorber to one or more areas of the layer,
• fusing the areas with the absorber by an energy input component,
• wherein these steps are repeated until the one or more three-dimensional parts are obtained,
• wherein the particulate material is applied by a recoater and the absorber is selectively applied by a print head, the particulate material is solidified by the energy input component, wherein the recoater includes a resistance heater or other heating element and is an oscillating blade recoater and the temperature of the particulate material in the recoater is controlled to a temperature of 70° C. to 155° C., the particulate material is applied by generating a particulate material roll in front of the recoater in the coating direction, the diameter of the particulate material roll is adjustable, and the particulate material is heated to or kept at a temperature of 155° C. to 180° C. by the energy input component during the repeated layer application onto the construction field, and
• wherein the recoater requires repeated refilling from a stationary powder reservoir while producing the one or more three-dimensional parts;
• wherein the one or more three-dimensional parts are produced in a process chamber having an air space, the construction field is an area of a construction space, wherein a gas flow is conducted through the air space over the construction field in order to adjust a desired temperature of 30° C. to 60° C. in the construction space;
• wherein the method is a high speed sintering method;
• wherein the particulate material roll has a generally constant dimension in a direction of application of the roll, wherein the generally constant dimension is preselected in the range of 2 to 10 mm;
• wherein the layer has a generally constant thickness, preselected in a range of 0.05 to 0.5 mm.

A method for producing one or more three-dimensional parts comprising the steps of:

• applying a layer of a particulate material onto a construction field,
• selectively applying an absorber to one or more areas of the layer,
• fusing the areas with the absorber by an energy input component,
• wherein these steps are repeated until the one or more three-dimensional parts are obtained,
• wherein the particulate material is applied by a recoater and the absorber is selectively applied by a print head, the particulate material is solidified by the energy input component, wherein the recoater is an oscillating blade recoater and temperature of the particulate material in the recoater is controlled to 70° C. to 155° C., the particulate material is applied by generating a particulate material roll in front of the recoater in the coating direction, the diameter of the particulate material roll is adjustable, and the particulate material is heated to or kept at a temperature of 155° C. to 180° C. by the energy input component during the repeated layer application onto the construction field;
• wherein the one or more three-dimensional parts are produced in a process chamber having an air space, the construction field is an area of a construction space, wherein a gas flow is conducted through the air space over the construction field in order to adjust a desired temperature of 30° C. to 60° C. in the construction space;
• wherein the method is a high speed sintering method;
• wherein the particulate material roll has a generally constant dimension in a direction of application of the roll, wherein the generally constant dimension is preselected in the a recrystallization temperature, and is applied
• wherein the layer has a generally constant thickness, preselected in a range of 0.05 to 0.5 mm.