Amortizing Multi Cavitation Tooling Assets across Volatile Component Demand Curves
Structure high-cavitation tooling capital through modular inserts and explicit true-up clauses to eliminate unamortized debt exposure during demand swings.
Regrind Threshold
Meaning
Recycled content limits define the maximum percentage of reprocessed plastic that can be blended with virgin resin without compromising mechanical properties. In polymer processing, the regrind threshold dictates the limit of recycled material that a moulder can introduce into the production flow. Exceeding this limit causes measurable variation in melt flow rate and part strength.
This boundary is established through mechanical testing to ensure product integrity.
Viscosity Fluctuation
Melt flow characteristics change as more recycled plastic is added because the polymer chains have already experienced a thermal cycle. Since each cycle reduces the molecular weight, staying below the regrind threshold is necessary to prevent erratic viscosity shifts. High viscosity variation leads to filling instability and inconsistent part dimensions.
This shift can cause flash or short shots on the production line, complicating the process control for the machine operator.
Economic Limit
Cost savings are balanced against quality risks when using reprocessed material. Operating right at the regrind threshold maximizes material savings but reduces the process window. Scrap material from runners and rejected parts is granulated and fed back into the hopper.
This internal recycling reduces raw material costs.
Sourcing Control
Sourcing specifications must explicitly state the allowed percentage of recycled content. For safety-critical parts, the regrind threshold is often set to zero to eliminate any risk of material degradation. In consumer products, a higher limit is acceptable.
This specification is a contract between the moulder and the customer.