车门拉钩底座盖热流道注塑模及模内热切机构结构设计

针对塑件脱模困难、扁干寿命短和生产效率低等实际生产难题，设计了1种1模2腔底盖塑件的热流道两板注塑模具。模具中，设计了斜顶头+圆斜顶杆组合的斜顶机构有利于降低斜顶机构的加工难度和装配难度；设计了扁斜顶杆+圆杆导向的斜顶机构解决了扁顶杆工作寿命短的难题，提高了模具的整体使用寿命；设计了一种模内热切侧浇口机构，有效提高了塑件生产效率和降低人工剪除浇口成本。模具通过开设等间距型排气槽、成型件单侧定位压紧安装、模板闭模平衡块、导套开槽通气等措施来保证模具工作的可靠性。冷浇口模内热切机构由浇口切除机构和驱动机构组成，机构结构简单，有较好的模具生产推广价值。

Structure Design of Hot Runner Injection Mold and Hot Cutting Mechanism in Mold for Door Hook Base Cover

Aiming at three defects in the current mold, we designed a hot runner two?plate injection mold with two cavities for a bottom cover plastic part. In view of the difficulty in demolding plastic parts, we first designed an inclined roof mechanism consisting of an inclined head and a round rod lifter to reduce the machining and assembly difficulties of the lifter mechanism. Afterward, we designed a lifter mechanism with a flat lifter guided by a round rod to overcome the short lifetime of the flat lifter and improve the overall service life of the mold. Thirdly, we designed a hot side gate removing mechanism in the mold, which could effectively improve the production efficiency of plastic parts and reduce the cost of manual gate removing. The reliability of the mold was guaranteed by setting the equal distance type exhaust slot, one side positioning and pressing installation of the forming part, closing the balance block of the mold, and slotting and ventilation of the guide sleeve. The cold side-gate hot removing mechanism in the mold was composed of a gate remo-ving mechanism and a driving mechanism. The mechanism has a simple structure and exhibits a potential for future practical application.