Patent ID: 9630364
Date: 2017-04-25
CPC Classifications: B29C

Claim:
1. A three-dimensional printing apparatus, comprising: a melting nozzle; a feeding roller set feeding a first feed material or a second feed material to the melting nozzle; a temperature sensor coupled to the melting nozzle for sensing an initial conversion temperature of the melting nozzle; and a controller coupled to the melting nozzle, the feeding roller set, and the temperature sensor for comparing a first melting point temperature of the first feed material and a second melting point temperature of the second feed material when switching a status from feeding the first feed material to the melting nozzle to feeding the second feed material to the melting nozzle, and selecting a higher melting point temperature from the first melting point temperature and the second melting point temperature as the initial conversion temperature, wherein after executing a slag processing procedure according to the initial conversion temperature, the controller controls the initial conversion temperature to recover from the first melting point temperature to the second melting point temperature if the first melting point temperature is the higher melting point temperature, wherein after executing the slag processing procedure according to the initial conversion temperature, the controller controls the initial conversion temperature to maintain at the second melting point temperature if the second melting point temperature is the higher melting point temperature.