Mould Construction Robust sub-gates suit classical applications
The components for side gating are said to eliminate machining requirements and offer better wear properties.
I-Mold has introduced its TPS straight standard sub-gates, which are said to be for classical side-gating operations and suitable for all standard and engineering plastics as well as thermoplastic elastomers.
According to the supplier, compared with gates machined directly into the mould, TPS straight standard sub-gates offer a number of advantages when it comes to the design, construction, operation and maintenance of the injection mould. For example, the costly spark erosion process for the runner may be waived and the sub-gate inserted into an exactly mating rectangular recess and screwed in place, either from the side or from underneath, I-Mold said.
Moreover, the company added that the sub-gates are manufactured from a highly wear-resistant material hardened to 54+2 HRC (M2 hot working steel, grade 1.3343) and thus provide long service, even when used in the processing of abrasive plastics containing a high ratio of fillers and reinforcing agents. According to the company, TPS straight standard sub-gates offer an additional advantage when working with prototype moulds in aluminium: They permit the production of a larger number of parts, especially where the material being processed is glass-fibre reinforced. I-Mold noted that a gate machined directly into the aluminium mould would soon become worn and would no longer be serviceable after a few hundred parts.
The TPS straight standard sub-gates are available in four sizes, with gate diameters of 0.4 to to 4.5 mm. For materials of medium viscosity, the TPS straight standard sub-gates are suitable for maximum shot weights ranging from 20 g (TPS-S) to 1,000 g (TPS-3), the company said.