Silicone Mould Ageing: Diagnosis and Service Life
硅胶模具的老化诊断与寿命管理
标签：硅胶老化, 模具寿命, 伸长率, 记录卡
硅胶模浇约 20 次后细纹变钝、边缘撕裂，多为水解老化：判定标准是扯断伸长率从 400% 降至 300% 以下、撕口发白无弹性。延缓措施：每次脱模后用中性皂水软刷清洗、彻底晾干后扑滑石粉，存放于 15–25 ℃ 避光柜；忌阳光直射与暖气烘烤（超过 40 ℃ 加速分子链断裂）。建立模具寿命卡登记浇注次数与蜡温（超过 75 ℃ 明显折寿）；关键母模在浇满 15 次之前就翻制备份模，避免订单中途断档。
After about 20 pours, silicone moulds dull out and tear—hydrolytic ageing: elongation at break drops from 400% below 300% and tears go chalk-white. Slow it down: wash after each cast with neutral soap and a soft brush, dry fully, dust with talc, and store at 15–25 °C in the dark; never sun or near heaters (above 40 °C chains break fast). Keep a service card logging pours and wax temperature (over 75 °C is punishing), and cut a backup mould before the fifteenth pour on critical masters.