Localized Mold Temperature Control Optimizes Surface Quality

Incoe Corp. features dynamic localized mold temperature control with its Heat-INject technology to demonstrate how the part surface quality and the filling of the cavity is optimized with relatively little effort using targeted heat pulses. 

Figure 1 depicts parts before and after using Incoe’s Heat-INject. Unitized with the hot runner, heat pulses are transferred into the cavity wall to avoid the knit line where the melt flows merge. 

Heat-INject technology offers a solution for reducing knit lines about holes and openings on a part. Additionally, the technology improves melt flow through cold runner fan gates or part thin wall sections of the cavity (Figure 2). Heat-INject technology is designed as an add-on module to Incoe unitized manifold systems, offering a simple design and implementation, reduced mold modifications/costs compared to other solutions and low power consumption — only 220VAC/30-amp power input is required.

Heat-INject technology localized selection of dynamic mold temperature control ensures significantly improved part quality and low-stress filling of the cavity. Incoe’s multi-use Flight Attendant parts have three holes (Figure 3) and demonstrate the Heat-INject technology solution. Figure 3a depicts knit lines that occur when two melt flows merge. Figure 3b shows how the knit disappears on the surface heated with Heat-inject. Figure 3c reveals that none of the knit lines are visible when both sides are heated.