48 cavities is demonstrably short
A common production calculation shows a real output gap after realistic downtime and changeovers are included.
64 cavity controlled scale-up review
64 Cavity PET Preform Mold
Use 64 cavities when 48 is short and 72 adds capacity or platform burden you cannot use.
The photographs show a 64-cavity mold and related project evidence. Final part geometry, neck finish, layout, runner, machine interface and acceptance criteria remain drawing- and project-specific.
Cavity count
64 cavities
Output step
+33.3% vs 48 per cycle
Neighbor delta
11.1% fewer than 72
Decision focus
Controlled scale-up
A 64-cavity proposal must have a visible role. It should close a measured 48-cavity capacity gap while avoiding a clearly documented cost, machine or operating consequence of the 72-cavity alternative.
Cavity selection
64 cavities is best suited to a measured production requirement
Shortlist 64 cavities when it solves a measured capacity gap without creating an unsupported platform step.
+33.3%
parts per cycle versus 48 cavities
This is the exact per-cycle relationship. The final useful-output comparison still requires a verified cycle, realistic utilization and the same approved preform basis.
72 offers unnecessary surplus
The additional eight cavities do not justify their incremental mold, system or machine burden for the confirmed planning horizon.
The platform supports 64 cleanly
Machine, controls, cooling, mold handling and maintenance resources fit the 64-cavity proposal without relying on unverified assumptions.
Product definition
Define the preform before fixing the 64-cavity mold
Cavity count does not define the molded part. The approved neck, weight, resin, bottle application and acceptance sample determine shot, stack geometry, cooling demand and machine feasibility.
View imageMold output
64 PET preforms per completed molding cycle
Neighbor relationship
33.3% more parts per cycle than 48; 11.1% fewer than 72
Representative use
High-volume, drawing-defined PET preform production
Neck program
PCO 1881, PCO 1810, 29/25, 30/25 or another drawing-defined finish
Preform weight
Defined by the approved part drawing and used for the 64-cavity shot calculation
Part shot basis
64 x approved preform weight, plus the agreed process allowance
Platform question
Whether 64 and 72 share or change the machine, controller, cooling and mold-handling platform
Evidence basis
Traceable cavity samples, recorded trial settings, inspection and packing records
Construction and service scope
Specify the complete 64-drop production system
The listed material and component package is an available quotation basis, not an unchangeable catalog promise. The final proposal and approved drawings must record the selected materials, runner, controls, cooling and replaceable parts.
Mold base
Available basis: 420 stainless steel
Core, cavity and neck ring
Available basis: M333, hardened to HRC 48-51
Heat treatment
Available basis: German Ipsen equipment
Hot-runner components
Available basis: German HOTSET heaters with PCT nozzles and insulators
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View imageQuantify the controlled scale-up
Use one capacity model for 48, 64 and 72 cavities. Keep the part, cycle assumption, operating hours and utilization constant. The 64-cavity choice should have a visible role: close a confirmed demand gap while avoiding a clearly identified cost or platform consequence of 72.
- Use one calculation sheet
- Name the demand owner
- State the avoided 72-cavity burden
Check architecture instead of cavity number alone
Ask whether the 64- and 72-cavity concepts share the same mold platform, runner family, controller, utility demand and service approach. If the architecture is nearly identical, compare the incremental commercial value directly. If it differs, document the technical boundary.
- Compare mold envelopes
- Compare zones and utilities
- Compare service components
Increase acceptance discipline with system size
The trial plan should identify sample cavities, agreed part checks, gate and visual review, process conditions and corrective-action closure. The evidence package must be practical enough to execute; a long generic checklist with no sampling responsibility does not improve acceptance.
- Set a traceable sample plan
- Assign measurement responsibility
- Close open actions before packing
Machine and useful output
Calculate capacity first, then prove machine compatibility
The calculator does not invent a cycle from preform weight. It shows the maximum cycle each standard cavity option must achieve for the requested output, then uses an entered verified cycle only when the buyer has one.
Injection unit
Approved part shot, screw diameter, pressure, recovery and plasticizing capacity
Mold envelope
Platen, tie bars, mold-height range, mounting pattern and proposed mold drawing
Mold movement
Opening stroke, daylight, take-out clearance and mold handling method
Hot-runner control
Temperature zones, connectors, controller capacity and valve-gate actuation
Plant utilities
Cooling-water temperature, pressure and flow plus electrical, air and hydraulic interfaces
Production basis
Approved preform, PET resin, verified cycle, required output, operating hours and downtime margin
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.
243248647296
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.
Neighbor comparison
48 cavities vs 64 cavities vs 72 cavities
Use one approved preform, one verified cycle basis, one operating calendar and one utilization assumption. Otherwise the numerical comparison is not meaningful.
| Decision factor | 48 cavities | 64 cavities | 72 cavities | Buying implication |
|---|---|---|---|---|
| Parts per cycle | 48 preforms | 64 preforms | 72 preforms | 64 adds 16 parts over 48; 72 adds eight more at the same cycle. |
| Part shot basis | 48 x approved weight | 64 x approved weight | 72 x approved weight | Calculate total part mass, then verify injection and plasticizing capability. |
| Capacity role | Measured shortfall | Controlled scale-up | Maximum standard option | The 64-cavity role must be visible in the demand plan, not assumed from its position between two numbers. |
| Platform delta | Check whether smaller | Document exact platform | Check whether shared | If 64 and 72 inherit the same burden, compare the incremental commercial value directly. |
| Selection trigger | 48 misses confirmed demand | 64 closes the gap | 72 surplus is useful | Keep the part, cycle and utilization assumptions identical across all three options. |
Trial and acceptance
Make the 64-cavity shipment decision from traceable evidence
Acceptance should be executable: approved part and machine basis, recorded trial conditions, identifiable cavity samples, agreed checks and corrective-action closure before packing.
01
Freeze the approved part basis
Approve the preform drawing, neck finish, weight, PET grade, color and visible quality requirements before final design.
02
Close the machine and utility interfaces
Confirm shot, platen, tie bars, mold height, opening, controller, cooling, actuation, take-out and handling against the proposed mold drawing.
03
Record the agreed trial condition
Run with the agreed machine and PET resin, then record process settings, cooling conditions and the verified cycle used for acceptance.
04
Check all 64 cavities
Confirm normal molding from all cavities and provide a complete 64-piece, cavity-identified sample set for the agreed neck, weight, gate, appearance and molding checks.
05
Close corrective actions before packing
Provide the agreed trial video and inspection records, close failed checks, then verify documents, spares, rust prevention and export packing.
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View imageDefine production-continuity spares before the order
Quantities and part numbers belong in the quotation and final supplied-parts list.
Cavity insert, core and neck ring
Gate insert, valve pin and nozzle
Heater, thermocouple and insulator
Controller module and solenoid valve
Water connectors, seals and identified fasteners
64-cavity RFQ
Send the inputs that change this decision
A 64-cavity inquiry should include the 48-cavity shortfall and the reason 72 is not preferred. Request all three options on one technical and commercial basis.
Approved preform drawing and weight
Confirmed demand and capacity gap
48/64/72 comparison request
Exact injection machine data
Runner and controller requirements
Plant cooling and utilities
Maintenance and trial-evidence plan
What happens next
- 01Confirm the 48-cavity capacity shortfall with realistic downtime
- 02Compare 48, 64 and 72 architecture on one machine and utility basis
- 03Return the supported scale-up, trial plan and production-continuity spares
Buyer questions
64-cavity technical FAQ
These answers explain the selection method. Exact performance remains tied to the approved part, machine, utilities and recorded trial conditions.
01What business case supports a 64 cavity PET preform mold?
A defensible case shows that 48 cavities leaves a confirmed capacity gap, 64 closes it under realistic operation, and 72 adds cost or platform burden that demand does not yet justify.
02Is 64 cavities always easier to run than 72 cavities?
No. The two proposals may use similar architecture, controls and utilities. Compare the actual mold drawings, system scope and maintenance plan rather than assuming the smaller number is simpler.
03What machine checks become critical at 64 cavities?
Review total shot and plasticizing, platen and tie-bar clearance, mold height, mounting, opening movement, controller zones, cooling capacity, utilities and take-out for the exact preform.
04How should a 64-cavity trial sample plan be prepared?
Identify cavities, define project-specific weight, dimensional, visual and gate checks, record approved trial conditions, assign sampling responsibility and close corrective actions before packing.
Next decision