Double‑Height Injection Mould for Thin-Wall Cups

A stack injection mould for thin-wall cups has two parting faces, increasing output per machine. This injection mould for thin-wall cups uses a center manifold to distribute melt to both levels. The stack injection mould for thin-wall cups requires a synchronized ejection system.

The cooling water flows through both halves of the stack injection mould for thin-wall cups in parallel. Because the stack injection mould for thin-wall cups has more cavities, the platen size must be larger. The tie bars of the press must accommodate the stack injection mould for thin-wall cups height.

When building a stack injection mould for thin-wall cups, the center section floats between two fixed plates. A rack‑and‑pinion gear ensures that the stack injection mould for thin-wall cups opens evenly. The hot runner manifold for a stack injection mould for thin-wall cups is complex.

Heater cartridges in the manifold maintain precise temperature for the stack injection mould for thin-wall cups. The stroke length of a stack injection mould for thin-wall cups is twice that of a single‑face mould. Stack injection mould for thin-wall cups reduces the required clamping force by half per cavity.

For a given press, a stack injection mould for thin-wall cups doubles productivity. The downside is that a stack injection mould for thin-wall cups costs 60% more. However, the lower energy per part makes a stack injection mould for thin-wall cups economical for long runs. Many major cup manufacturers now use a stack injection mould for thin-wall cups for large orders.