对称件一模四腔四面抽芯注射模具设计

Design of injection mould for symmetrical parts with four cavities and four sides core-pulling

在一模多腔的多向抽芯注射模中,相邻型腔间的对向抽芯机构会需增加安装空间,使模具总体尺寸变大,成本增加。针对产品四方向的侧向凸凹特点,采用4个斜导柱外侧抽芯机构,设计了一模四腔的热流道注射模。通过对抽芯距进行分析,将抽芯距最小的方向放在了模具内侧,以减小滑块的安装空间;对相邻型腔的内侧对向滑块使用了共用楔紧块,使型腔间距缩小了41.5%,共用楔紧块两个方向受到相等的型腔压力,受力平稳;单个产品布置了25个推杆,推出平衡,设计了循环式的冷却水路,模具温度均匀。通过实践验证,该模具结构紧凑,抽芯机构运动可靠。

In a mold with multiple cavities and multi-direction core-pulling injection mold,the contrastive core-pulling mechanism between adjacent cavities will need to increase the installation space,so that the overall size of the mold will be larger and the cost will increase.According to the characteristics of lateral convexity and concavity in four directions,a hot runner injection mold with four cavities was designed by using four core-pulling mechanisms on the outside of inclined guide posts.Through the analysis of the core-pulling distance,the direction with the minimum core-pulling distance is placed on the inside of the mold to reduce the mounting space of the slider.A common wedge block was used for the opposite slider of the adjacent cavity,which reduced the cavity spacing by 41.5%.The two directions of the shared wedge block were subjected to the same cavity pressure,and the force was stable.A single product is arranged with 25 push rods to push out the balance.A circulating cooling water channel is designed.The mold temperature is even.Through practice,the mould has compact structure and reliable movement of core-pulling mechanism.