an ejector housing cross-section must be designed with the desired plate thickness and necessary ejector stroke. By increasing the lifter core angle, a mold designer can achieve faster part ejection and a larger undercut feature. […]
Use of a second guide rod parallel to the lifter core is a relatively new and under-utilized method. […]
When designing mold cores for undercuts and side-action molding, the designer has several lifter system options. […]
The injection molding of precision and micro parts creates special demands on the moldmaker and hot runner supplier. […]
In a mold for small parts the pitch dimension of the hot runner tips determines the mold size. To reduce the size it is necessary to screw the tips directly into the manifold. […]
The degradation of the material depends not only on the dwell time, but also on the temperature profile of the hot runner components. […]
As previously mentioned, reduced heat transfer into the mold can be achieved by minimizing the contact surfaces between the mold and hot runner. […]
All of the previous methods of rapid tooling involve the indirect production of a master pattern from which the tool is produced. […]
Rather than making a master stereolithography pattern around which a material is cast, it also is possible to build the cavity directly on the stereolithography machine. […]
In the same way that a cavity can be generated directly by stereolithography, it also is possible to build tool cavities directly using the laser sintering process. […]