Page 157 - Kỷ yếu hội thảo quốc tế: Ứng dụng công nghệ mới trong công trình xanh - lần thứ 9 (ATiGB 2024)

148 TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT - ĐẠI HỌC ĐÀ NẴNG

initially predicted, the insert is concave in the center,
as shown in Fig. 3.

Fig. 1. Variation values of deposition
on FDAC and SKD61 core inserts Fig. 3. 3D scan result of SKD61
3.2. Cavity inserts and FDAC core insert
Important locations on cavity inserts that have the Furthermore, because the displacement tends to be
most significant deformation after shots were chosen concave, the product during the casting process of the
to be evaluated. Fig. 2 shows the variation values of FDAC mold cavity appears burr in the middle of the
deformation on FDAC and SKD61 cavity inserts. product.
There is an abrasion in the SKD61 cavity core
shown in Fig. 4, but it is not significant. However, the
FDAC cavity core shows quite abrasion, especially
where the die material flows through, causing obvious
dents to appear on the surface of the insert. The
location of the 8 positioning pins on the cavity insert
deforms, the pin's tips were worn but not critical.

Fig. 4. Actual images of abrasion on two cavity inserts
During the solidification process of the die
Fig. 2. Variation values of deposition on FDAC material, the molded part appears to shrink, which
and SKD61 cavity inserts was predicted during the simulation process. This
3.3. Evaluate 3D scan results results in the squeezing and pulling of the eight
positioning pins toward the center of the cavity insert.
Based on the 3D scanning results, it can be seen In addition, because the above situation occurred
that the deposition process of the two core inserts many times, a positioning pin broke and got stuck in
FDAC and SKD61, is clearly different. Contrary to the part while opening the mold. This phenomenon
initial predictions, the SKD61 core insert tends to appeared on the SKD61 cavity insert, shown in Fig. 5,
bulge in the center after 300 shots. In contrast, the contrary to previous predictions that the FDAC cavity
FDAC core insert has the exact same changes as insert would be the one that was damaged

ISBN: 978-604-80-9779-0