Product/Service

Stack Mold System

Source: Mold-Masters Limited
Numerous developments in stack mold hot runner systems have provided increased flexibility, functionality, and processing efficiency. A valve to valve shut-off for stack molds offers molders distinc
Numerous developments in stack mold hot runner systems have provided increased flexibility, functionality, and processing efficiency. A valve to valve shut-off for stack molds offers molders distinct advantages in comparison to sprue bars, and practical solutions in applications.

New manufacturing technology has resulted in manifolds that feature rheologically balanced flow and optimize the assembly of hot runner components to allow tight spacing of multi-cavity systems. In many applications, cavity layout is no longer restricted by valve gating due to the innovative use of side melt links and multi-level manifold design.

The valve to valve design in stack molds eliminates the common drawbacks of the sprue bar:

  • No component extends past the parting line, so there is no possibility of part damage during de-molding, or part handling interference.
  • Hot runner components are never exposed during de-molding ensuring isothermal melt conditions.
  • Leakage at the machine nozzle/hot runner interface is eliminated due to continuous machine nozzle contact.
  • Fatigue damage to hot runner (sprue bar) from cyclical machine nozzle contact is eliminated.

Mold-Masters Limited, 233 Armstrong Avenue. Tel: 905-877-0185; Fax: 905-873-2818.