| 摘要 |
PURPOSE:To enable to evaluate the fluidity of injection molding material without taking a molded part out of a mold by a method wherein the evaluation of the fluidity of injection molding material can be performed, based upon the time required for fluid material to pass through a fluid material passage with the predetermined distance. CONSTITUTION:When molding material is injected form an injection molder to the sprue 12 of a mold 10, fluid material flows through a lid material passage 13. A first material passage sensor 14 and a second material passage sensor 15 are provided in the midway of the fluid material passage 13. Signals from the first and the second material passage sensors 14 and 15 are treated by amplifiers 16 and 17 (respectively), and after that inputted to a timer 18 or timing device. the transit time of every fluid material is measured so as to evaluate the fluidity of molding material by comparing the measured lengths of transit time. |
