How do you calculate cure cycle capacity?

Divide the required batches by the throughput rate to get base time, then multiply by one plus the allowance. With 28 batches at 3.5 batches/hr the base is 8 hr, and a 20% allowance gives 9.6 hr.

Why add a queue and documentation allowance?

Because real cure operations lose time to loading, thermocouple setup, autoclave logging, and parts waiting for a slot. The 20% allowance in the example bumps 8 ideal hours to a realistic 9.6 hours.

What is a good cure queue allowance?

Many composites shops use 15% to 30% depending on documentation burden and load complexity. Aerospace work with heavy quality records sits at the higher end; simpler industrial parts can use less.

Does this account for different cure recipes?

No. It assumes a single average throughput rate. If your batches use different cure profiles, run the calculator per recipe group, because a long high-temperature soak takes the same hours whether it holds one part or twenty.

How do I increase cure capacity?

Add vessel hours via a second shift, nest more parts per batch to raise effective throughput, or shorten the queue and documentation time that drives the allowance down. Cutting the allowance from 20% to 10% in the example saves nearly an hour.

Is cure capacity the same as autoclave availability?

Not quite. Capacity here is the time your batches need; availability is the vessel hours you have. Compare the two: if the 9.6-hour need exceeds your open vessel window, you are short.

Composites, Fiberglass & Advanced Materials calculator

Cure Cycle Capacity Calculator

Cure cycle capacity estimates the realistic clock hours needed to push a set of cure batches through your oven or autoclave, after adding an allowance for the queue, loading, and quality documentation that ideal throughput ignores. Composites schedulers and capacity planners use it because the cure step is almost always the bottleneck, and naive batch-divided-by-rate math always underestimates real elapsed time. Knowing the honest number lets you promise delivery dates you can hit and spot when a second shift or vessel is required. This calculator takes the base throughput time and inflates it by your documented allowance to give a planning figure you can trust.

What this calculator does

Estimate total cure time required for oven, autoclave, or press cure cycles.
checking whether cure assets can support planned composite output
It computes realistic cure time by dividing required batches by throughput rate, then adding a percentage allowance for queueing, loading, and paperwork.

Formula used

Base cure cycle capacity = parts or cure batches required ÷ cure batch completion pace
Estimated cure cycle capacity = base time × (1 + cure queue and documentation allowance)

Inputs explained

Cure batches required to clear the job:
Cure throughput per oven hour:
Queue, load, and documentation allowance:

How to use the result

Use it for scheduling, promising delivery dates, and deciding when cure demand exceeds available vessel hours.
It treats throughput as a steady average; a single long-soak cure recipe can blow past the estimate because cure time is set by chemistry, not by batch count.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate cure cycle capacity? Divide the required batches by the throughput rate to get base time, then multiply by one plus the allowance. With 28 batches at 3.5 batches/hr the base is 8 hr, and a 20% allowance gives 9.6 hr.
Why add a queue and documentation allowance? Because real cure operations lose time to loading, thermocouple setup, autoclave logging, and parts waiting for a slot. The 20% allowance in the example bumps 8 ideal hours to a realistic 9.6 hours.
What is a good cure queue allowance? Many composites shops use 15% to 30% depending on documentation burden and load complexity. Aerospace work with heavy quality records sits at the higher end; simpler industrial parts can use less.
Does this account for different cure recipes? No. It assumes a single average throughput rate. If your batches use different cure profiles, run the calculator per recipe group, because a long high-temperature soak takes the same hours whether it holds one part or twenty.
How do I increase cure capacity? Add vessel hours via a second shift, nest more parts per batch to raise effective throughput, or shorten the queue and documentation time that drives the allowance down. Cutting the allowance from 20% to 10% in the example saves nearly an hour.

Last reviewed 2026-05-12.