PET Preform Heating Oven Planning
What does faster preform throughput do to estimated oven transit time?
"These are invented teaching inputs, not equipment ratings, market prices or an accepted tolerance. The two scenarios change one assumption while holding the other inputs constant. Use the comparison to identify what must be measured or agreed for your project."
Two planning scenarios
Record item,Unit,Scenario A,Scenario B,How to establish this input
Preforms inside oven,Quantity,90,90,"Keep the physical count or usable-stock record for the stated configuration and time. Identify incomplete, blocked, rejected or unavailable stock separately. A total installed capacity is not automatically the quantity available in the comparison."
Bottle rate,Bottles/h,6000,9000,"Record the quantity or distance and the corresponding observation time, named product format and operating mode. Distinguish a measured rate from a quoted capability; an average across a different window is not the same input."
Calculated comparison
Record item,Unit,Scenario A,Scenario B
Time,s,54,36
What the comparison means,"The oven inventory is unchanged while throughput rises, so the nominal transit time falls. This is a timing relationship, not a validated heating recipe. The shorter time does not show whether the preform reaches a suitable profile or whether the resulting bottle is acceptable. Examine the actual process and product before increasing line speed."
Evidence to request,"Ask for the tracked preform path, recipe revision, material and bottle identification, measured operating condition and bottle-quality observations from a controlled trial."
Input assumptions,"Identify the bottle, pack or material configuration, operating mode and measurement boundary. State the start and finish of the observation and which accepted output the comparison represents; unlike boundaries cannot establish a performance improvement."
How to establish this input,"Mark every input as measured, taken from a drawing, quoted or assumed. Retain the source document identifier, revision, date and responsible person. The same numeral with a different unit or data status is not automatically a comparable input."
Project decision record,Ask the responsible supplier and buyer to agree actual acceptance criteria and the evidence that will demonstrate them. Teaching values and calculated outputs on this page do not become approved operating settings or contractual performance guarantees.
Evidence to request,"Record the decision affected by the result, the measurement or trial still needed, its owner and the next review. Keep unresolved items visible in the handover file instead of changing the figures to make a preferred equipment option appear acceptable."
Two planning scenarios,"These are invented teaching inputs, not equipment ratings, market prices or an accepted tolerance. The two scenarios change one assumption while holding the other inputs constant. Use the comparison to identify what must be measured or agreed for your project."