Abstract:

To explore the effect of ultrasonic vibration and hot bed on the mechanical properties of poly（ethylene terephthalate?co?1，4?cyclohexanedimethanol ester） specimens manufactured through melt deposition molding， an ultrasonic vibration device was installed on the current melt deposition molding equipment to prepare the tensile specimen and compression specimen through changing the ultrasonic power and hot bed temperature. The mechanical properties of the speci?mens were measured. The results indicated that the specimens exhibited an increase in tensile strength with an increase in ultrasonic power in the range of 0~30 W under the same condition of other forming parameters. However， the warping deformation of the specimen was easy to occur if the ultrasonic power was too large. Ultrasonic vibration could improve the compressive strength of specimen， and the maximum compressive strength was obtained at a power of 12 W. A good quality was obtained for the specimens at a hot bed temperature of 70 ℃. However， there was no significant effect on the mechanical properties of the specimens resulting from the change of hot bed temperature.

Key words: ultrasonic vibration, hot bed, fused deposition molding, poly（ethylene terephthalate?1， 4?cyclohexanedimethanol ester）