Optimizing Throughput is the goal of any foundry and a source of consistent wax patterns is a key factor in achieving this goal. Pattern consistency depends on a supply of consistent conditioned wax, that is viscosity dependent, from pattern to pattern. While the concept of a consistent supply of conditioned wax is simple – achieving it requires a comprehensive approach. Let’s trace the flow of wax from the supply source to the die.

The concept is more than just heating and melting the raw material. MPI believes that separating wax melting from wax conditioning is important. Since it is the first step in producing consistent patterns and therefore the more control the better end result. MPI’s wax melters control two very important variables:

• Wax is at the "melt temperature" specified by the manufacturer
• Wax is melted at a rate matching production throughput.

As conditioned wax is used to produce patterns, MPI’s Wax Level Control automatically and continuously replenishes the wax conditioning reservoir with small amounts of source wax. The source can be either direct melt or pumped from a remote source. Frequently introducing small amounts of hotter source wax into the wax conditioning reservoir ensures that the reservoir is not shocked (out of control limits).

Our reservoir does it all… from liquid to paste. It accurately conditions wax to optimum viscosity ±1/2ºF (±1/4ºC), providing consistent results from pattern to pattern regardless of the source wax temperature. These units are designed to condition up to 200 lb. (90 Kg.) of wax per hour.

Monitors and modulates wax temperature at 5 zones from two levels in the wax conditioning reservoir, to the injection cylinder, to the transfer hose, and to the nozzle. Our approach is to MAINTAIN a set temperature thought all zones rather than correct back to a set temperature at specific points. The result is pattern-to-pattern repeatability.

Flexible, controlled injection results are achieved through precise temperature control. Horizontal parting line and through the platen injection are available.

When wax/filler separation is a problem, MPI’s Purge Cycle is the solution. Under certain conditions – long periods between wax injections and lower wax viscosities (higher wax temperatures) filler can separate from the wax. Filler separation will result in unacceptable patterns. In order to prevent this condition MPI offers a wax purge cycle that recycles separated wax into the conditioning reservoir and replaces it with conditioned wax at the start of each injection cycle.