Patent ID: 6056431
Filing Date: 2000-05-02
Classification: B29B,B29C,G03C

Abstract:
A method for blending batches of melted solids comprising the steps of:(a) delivering a first batch of solid material having a known quantity to a first liquefaction apparatus;(b) delivering a second batch of solid material having a known quantity to a second liquefaction apparatus;(c) melting the first batch over a period of time;(d) pumping the melted portion of the first batch to a surge pot at a predetermined rate until there is a predetermined remainder of the first batch remaining in the first liquefaction apparatus;(e) reducing the predetermined rate at which the first batch is pumped by a predetermined amount;(f) beginning to melt the second batch of solid material;(g) pumping a melted portion of the second batch to the surge pot at a rate equal to the predetermined amount to thereby result in a combined flow which is equal to the predetermined rate;(h) ramping up the pumping rate from the second liquefaction apparatus while simultaneously ramping down the pumping rate from the first liquefaction apparatus; and(i) maintaining the combined flow rate to equal the predetermined rate during said ramping step.