24
Cavities
Controlled entry option
Baseline among the published options
Use when 24 cavities meet confirmed output with operating and maintenance margin.
Review 24-Cavity
Cavity selection center
PET Preform Mold Cavity Options
Work backward from required output and a verified cycle before choosing 24, 32, 48, 64, 72 or 96 cavities.
Preform weight defines part mass per cycle. It does not predict cycle time. The final choice also needs the exact injection machine, mold envelope, runner, cooling, controls and operating plan.
Capacity calculation
Compare every published cavity option from the same production basis
Enter the approved preform weight and required running output. Add a verified cycle only when it comes from a comparable preform, machine and cooling condition.
Cavity feasibility
What cycle must each cavity option achieve?
Cavity comparison
Enter weight and output
The result will show the cycle ceiling and part mass for 24, 32, 48, 64, 72 and 96 cavities. A specific recommendation appears only when a verified cycle is entered.
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The comparison does not predict cycle from preform weight. Wall thickness, geometry, PET resin, cooling water, hot runner, machine performance and quality requirements must be reviewed separately.
Published cavity range
Open the exact page only after the option survives the first calculation
Every card shows a capacity relationship, not a universal recommendation. Compare the same preform, verified cycle, utilization and operating calendar.
32
Cavities
Intermediate capacity step
33.3% more parts per cycle than 24
Use when 24 is short but 48 adds capacity the plant cannot use productively.
Review 32-Cavity48
Cavities
Established production step
50% more parts per cycle than 32
Use when demand is established and the machine, runner and maintenance plan support 48 drops.
Review 48-Cavity64
Cavities
Higher-output system
33.3% more parts per cycle than 48
Use when 48 is commercially short and the larger mold, controls and utilities are justified.
Review 64-Cavity72
Cavities
High-capacity system
12.5% more parts per cycle than 64
Use when the extra eight cavities have a measured capacity benefit and the full system is ready.
Review 72-Cavity96
Cavities
Maximum single-mold output
33.3% more parts per cycle than 72
Use for sustained high-volume programs supported by a coordinated machine, runner, cooling and maintenance platform.
Review 96-CavitySystem qualification
A cavity result is not a machine-fit approval
The calculator removes impossible capacity choices. The next review confirms whether the selected mold can actually fit, recover, cool, open and run on the proposed production system.
Approved preform drawing, weight, resin and neck
Total part shot and injection-unit operating window
Plasticizing and recovery at the verified cycle
Tie bars, platen, mold height, opening and take-out
Hot-runner zones, connectors, voltage and actuation
Cooling-water conditions, circuits and plant utilities
Maintenance access, critical spares and technician capability
All-cavity trial, traceable samples and acceptance responsibility
Decision risks
Do not buy extra cavities without a measurable operating benefit
01
Buying unused capacity
A high-cavity mold can tie up capital and maintenance resources when demand or operating hours do not support it.
02
Using an optimistic cycle
A cavity calculation can look attractive when cooling, resin, machine and real operating losses are omitted.
03
Ignoring cavity-level acceptance
Higher counts require an agreed method for identifying samples and reviewing consistency across the cavity set.
Cavity comparison RFQ
Send the inputs needed to turn the calculation into a supported mold direction
Send output and machine information even when the cavity count is open. The response can compare neighboring options instead of forcing one number too early.
Preform drawing, resin and weight
Required annual and hourly output
Planned operating hours and changeovers
Existing injection machine specification
Preferred cavity range if any
Maintenance and spare-parts expectations
Future capacity-growth plan
Buyer questions
PET preform mold cavity FAQ
How is PET preform mold cavity count calculated from target output?+
Use the required saleable output, operating hours, expected utilization and a stated project cycle assumption. Then check whether the resulting cavity range fits the part, machine, cooling, controls and maintenance plan.
Should I always compare the next higher cavity option?+
Yes when the machine and business case allow it, but compare total project burden as well as capacity. The next higher option may require a different machine, controller, utility or spare-parts plan.
Should cavity count be selected before the injection machine is confirmed?+
No. The shortlist can begin from output, but final cavity selection must be checked against total shot, mold envelope, mold height, controls, cooling, utilities and take-out on the exact machine.
Can one cavity recommendation work for every preform weight?+
No. Weight and geometry change total shot, cooling and machine demand. A cavity count discussed for a lightweight water preform cannot be transferred automatically to a heavy or wide-mouth part.