Thermoforming
8 조회수
Local over-thinning in ABS '2079851475616104458
문제 현상
The wall thickness of the vacuum formed part is too thin at the deeply stretched corners, easy to break, shiny when viewed against light, and insufficient in strength.
원인 분석
The draw ratio is too large and there is no plug assist, so the material is locally over-stretched; uneven heating makes the locally hotter areas thin first; uneven original sheet thickness is also an inducement.
해결 방법
①Add a pressure assist plug (felt-surface plug is suitable for ABS/HIPS); ②thicken the original sheet by 0.3~0.6mm; ③zone heating to retain more material in the stretch area; ④select sheets with consistent thickness; ⑤optimize the draw ratio design.
핵심 요약
ABS deep drawing must rely on a plug to 'deliver' the material to the corner: plug assist + zone heating + thicker sheet work together; local over-thinning is a material distribution problem, not something that can be solved by simply adjusting the temperature.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!