72 cavity high-output system review

72 Cavity PET Preform Mold

Use 72 cavities when demand exceeds 64 and the extra 96-cavity capacity is not yet needed.

A 72-cavity mold is a high-output production option between 64 and 96 cavities. Its value depends on usable production demand and a coordinated injection, hot-runner, cooling, control, take-out and service platform.

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The photographs show a supplied 72-cavity configuration reference. Final neck finish, part weight, runner architecture, mold dimensions, controls, utilities and acceptance criteria follow the approved proposal and drawings.

Cavity count

72 cavities

Output step

+12.5% vs 64 per cycle

Selection basis

Right-sized high-volume demand

Qualification

Machine, runner and trial

Cavity selection

72 cavities is best suited to a measured production requirement

Shortlist 72 cavities when capacity is commercially useful and the entire production system is ready.

+12.5%

parts per cycle versus 64 cavities

The eight-cavity gain is exact at a common cycle. Its business value must exceed any added platform, maintenance or utility burden.

Demand is established

Confirmed production requirements use the higher capacity while leaving a realistic maintenance and changeover margin.

Platform compatibility is documented

The exact machine, controls, utilities, mold handling and take-out requirements have been checked against the proposal.

Supplier and plant evidence is adequate

The buying team can evaluate project drawings, runner scope, trial plan, cavity samples, critical spares and maintenance responsibility.

Product definition

Define the preform before fixing the 72-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.

Mold output

72 PET preforms per completed molding cycle

Neighbor relationship

12.5% more parts per cycle than 64; 25% fewer than 96

Representative use

Established high-volume PET preform programs with a supported production platform

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 72-cavity shot calculation

Part shot basis

72 x approved preform weight, plus the agreed process allowance

Platform basis

Exact injection unit, mold envelope, controller, utilities, take-out and handling

Evidence basis

Traceable cavity-level samples and documented high-cavity trial conditions

Construction and service scope

Specify the complete 72-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

Core side of a 72-cavity PET preform mold — 72-cavity core-side configuration reference. Confirm component numbering, cooling, alignment, replacement access and spare responsibility.

PET preform mold hot-runner manifold close-up — Runner reference for technical discussion. A 72-drop proposal must define architecture, zones, valve-gate actuation, wiring, controller and service access.

Qualify the production platform before the price

Review the approved preform and 72-cavity total shot together with the exact machine specification, proposed mold dimensions, controller, cooling and handling method. A price comparison is premature when one supplier assumes a platform or interface that the plant does not have.

Use exact machine documents
Check all utility interfaces
Confirm mold handling

Demand stronger runner and trial evidence

Ask how the runner and cooling concepts will be reviewed and what cavity-level evidence will be delivered. The acceptance plan should be specific enough to execute and should avoid unsupported universal tolerances. Link samples and measurements to the approved part and trial conditions.

Request traceable samples
Record trial conditions
Define corrective-action closure

Prove the capacity gain over 64 cavities

Compare 64 and 72 cavities with the same preform, cycle assumption, operating hours and utilization. The eight-cavity increase should create useful saleable output without forcing unsupported machine, utility or maintenance assumptions.

Use one output calculation
Document the machine delta
Confirm maintenance capacity

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.

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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.

Neighbor comparison

64 cavities vs 72 cavities vs 96 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	64 cavities	72 cavities	96 cavities	Buying implication
Parts per cycle	64 preforms	72 preforms	96 preforms	72 adds eight parts over 64; 96 adds another 24 parts at the same cycle.
Part shot basis	64 x approved weight	72 x approved weight	96 x approved weight	Use the approved part and process allowance for every machine calculation.
Capacity role	Controlled high-output step	Right-sized high-volume step	Maximum single-mold output	72 should close a confirmed capacity gap while avoiding 96-cavity capacity the plant cannot yet use.
System qualification	64-drop system	72-drop system	96-drop system	Price comparison starts only after the exact machine, runner, controller, cooling and handling interfaces are closed.
Selection trigger	64 meets demand	72 capacity is productive	96 capacity is productive	Use saleable output, product mix and operating margin to select the smallest supported system that meets the plan.

Trial and acceptance

Make the 72-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.

Freeze the approved part basis

Approve the preform drawing, neck finish, weight, PET grade, color and visible quality requirements before final design.

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.

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.

Check all 72 cavities

Confirm normal molding from all cavities and provide a complete 72-piece, cavity-identified sample set for the agreed neck, weight, gate, appearance and molding checks.

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.

PET preform trial sample batch for cavity-level inspection — Trial sample reference. High-cavity acceptance requires a practical traceable sampling plan, recorded process conditions and closure of failed checks.

Export crates for PET preform molds — Packing reference. Critical runner and electrical spares, documents, rust prevention and crate marks must be verified before shipment release.

Define 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

72-cavity RFQ

Send the inputs that change this decision

A 72-cavity request needs proven demand, exact machine data and a defined evidence package. Include 64 on the same technical basis so the capacity and system difference is visible.

Approved preform drawing, resin and weight

Confirmed production requirement

64 versus 72 comparison basis

Exact machine and controller data

Cooling, utilities and take-out information

High-cavity trial sampling requirements

Critical spares and maintenance responsibility

What happens next

01Prove the required high-volume output and realistic utilization
02Compare 64, 72 and 96 on the exact machine, runner and utility platform
03Return the supported configuration, cavity-level trial plan and critical spares

Buyer questions

72-cavity technical FAQ

These answers explain the selection method. Exact performance remains tied to the approved part, machine, utilities and recorded trial conditions.

01What must be proven before choosing a 72 cavity PET preform mold?

Prove useful demand, exact machine-system compatibility, runner and cooling feasibility, executable cavity-level trial evidence, critical spares and plant maintenance readiness.

02How is a 72-cavity quotation different from a 64-cavity quotation?

Compare capacity, mold envelope, total shot, runner and control architecture, cooling, utilities, trial coverage, spares and platform requirements on the same part basis.

03Is one mold photograph enough to qualify a 72-cavity supplier?

No. Request source-confirmed project drawings or scope, relevant trial evidence, cavity sample method, component and spare information, and a clear responsibility path.

04How should 64 and 72 cavities be compared?

Use the same preform, resin, machine, cycle basis, operating hours and utilization, then compare useful capacity, total shot, mold envelope, controls, cooling, spares and maintenance burden.

Next decision