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1. (WO2018143956) APPAREIL D'IMPRESSION 3D ET PROCÉDÉS DE FONCTIONNEMENT D'UN APPAREIL D'IMPRESSION 3D
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

What is claimed is:

1. A 3D printing apparatus comprising a 3D printer arranged to perform a print operation using build material whilst a build material temperature sensed by the printer is below a threshold temperature of the build material, the printer arranged to obtain a threshold temperature indicator in advance of a respective print operation.

2. A 3D printing apparatus according to claim 1 , comprising a build unit, wherein the 3D printer is arranged to obtain the threshold indicator from the build unit.

3. A 3D printing apparatus according to claim 2, comprising an interface for interfacing with a control module in the build unit, wherein the printing apparatus is to receive the threshold temperature indicator from the build unit via the interface.

4. A 3D printing apparatus according to claim 1 , wherein the 3D printer is arranged to obtain the threshold indicator from a container containing a supply of build material.

5. A 3D printing apparatus according to claim 1 , comprising a temperature sensor to detect a temperature of the build material during a print operation.

6. A 3D print apparatus according to claim 5, comprising a comparator circuit to compare the detected temperature with the threshold temperature.

7. A 3D printing apparatus according to claim 6, comprising a power relay to provide power to a heating system of the printing apparatus, wherein a state of the power relay is dependent on an output of the comparator circuit.

8. A 3D printing apparatus according to claim 7, wherein the threshold temperature threshold is supplied as a reference signal to the comparator circuit and the detected temperature is supplied as an input signal to the comparator circuit.

9. A 3D printing apparatus comprising a 3D printer arranged to perform a print operation using build material from a build unit, the apparatus comprising:

an interface to receive a temperature cut-off setting;

a sensor to detect a build material temperature during a print operation; and a circuit responsive to a detected temperature exceeding the temperature cut-off setting to limit or prevent heating of the build material.

10. A 3D printing apparatus according to claim 9, wherein the interface is to receive the temperature cut-off setting from a removable build unit.

1 1 . A 3D printing apparatus according to claim 9, wherein the circuit is a comparator circuit.

12. A 3D printing apparatus according to claim 9, comprising a powder management station, the powder management station being to provide the build material to the build unit and/or retrieve build material from the build unit.

13. A 3D printing apparatus according to claim 12, comprising a build unit, the build unit comprising a power protection module to receive the temperature cut-off setting from the powder management station.

14. A method of operating a 3D printing apparatus, the method comprising: detecting a temperature of build material during a print operation of a 3D printing system;

comparing the detected temperature with a temperature cut-off setting obtained by the 3D printer; and

performing the print operation by the 3D printing system whilst the detected temperature is below the temperature cut-off setting.

15. A method comprising:

receiving, at a build unit, data representing the temperature cut-off setting, the data being received from a powder management station; and

transmitting the data to the 3D printer.