REP Basics

REP injection presses machine frame closing with clamping block
Flashless molded part

A high-performance system to produce rubber parts with consistency and accuracy

What is “flash”?

When a part is molded, excess material attached to the molded part is called flash or flashing.

It is typically caused by system deformation due to the closing force of the platens and traverses:

  • If the lower traverse is more rigid than the upper traverse, then flashing can form in the middle of the mold.
  • If the upper traverse is more rigid that the lower traverse, then flashing can form on the outsides of the mold.

Importance of parallelism 

REP press traverses are FEA optimized for rigidity. The traverses have adjustable nuts for perfect parallelism.

A small detail that makes a big difference when clamping the platens: The global system control under load is respected to ensure adequate clamping pressure distribution.

REP’s solution to ensure even clamping pressure distribution

  • Enhanced checks of traverse rigidity and flatness.
  • Optimized parallelism.
  • Even clamping pressure distribution at the parting line.
  • Use of titanium washers for consistent performance.
  • Carefully selected steel used for platens of optimized thickness.

All these factors are essential for flashless molding with no waste!

It also improves the quality of the molded parts. This system saves on the amount of rubber required.

It can be used alongside other solutions, such as the CRB (Cold Runner Block) to optimize production and consistency of rubber parts.