48 cavity production-system review

48 Cavity PET Preform Mold

Use 48 cavities when demand is established and the plant is ready for the larger system.

A 48-cavity mold is a production-system decision. The mold, hot runner, controller, injection unit, cooling supply, take-out and maintenance plan must be reviewed together before its extra output has commercial value.

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The photographs show a supplied 48-cavity configuration reference. Final neck finish, preform weight, cavity layout, runner architecture, mold envelope and machine interface follow the approved project drawing.

Cavity count

48 cavities

Output step

+50% vs 32 per cycle

Selection basis

Established useful demand

Operating focus

Balance, cooling and service

Cavity selection

48 cavities is best suited to a measured production requirement

Shortlist 48 cavities when demand is proven and the plant can support the larger system consistently.

+50%

parts per cycle versus 32 cavities

The capacity relationship is exact at a common cycle. It is not a promise that two different molds will achieve the same cycle or utilization.

Established production demand

The required output uses the capacity of 48 cavities under realistic shifts and downtime rather than relying only on a distant forecast.

Compatible machine and utilities

Shot, mold envelope, opening, controller, cooling and actuation checks support the proposed configuration.

Maintenance resources are planned

The plant can identify, stock and service the increased runner, heating, valve-gate, insert and cooling components.

Product definition

Define the preform before fixing the 48-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

48 PET preforms per completed molding cycle

Neighbor relationship

50% more parts per cycle than 32; 25% fewer than 64

Representative use

Established water, beverage and other drawing-defined PET preform programs

Neck program

PCO 1881, PCO 1810, 29/25, 30/25 or another drawing-defined finish

Preform weight

Defined by the approved part drawing; never inferred from cavity count

Part shot basis

48 x approved preform weight, plus the agreed process allowance

Useful output

Verified cycle x operating hours x realistic utilization

Evidence basis

A traceable 48-piece sample set and recorded trial conditions

Construction and service scope

Specify the complete 48-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 48-cavity PET preform mold — Core-side configuration reference. The final proposal should identify the stack, neck-ring arrangement, cooling interfaces and replaceable parts.

PET preform mold hot-runner manifold close-up — Hot-runner construction reference. The 48-drop proposal must define the actual manifold, heaters, sensors, actuation, zones and service parts.

Treat 48 cavities as a system decision

The mold, hot runner, controller, injection unit, cooling supply, take-out and plant maintenance plan must work together. A quotation that focuses only on the mold base or cavity count leaves the most important commissioning and operating boundaries undefined.

Review machine and mold together
Allocate control interfaces
Check plant utility conditions

Define cavity-level evidence before trial

Agree how samples are identified, which weight, dimensional, visual and gate checks apply, and how the approved trial conditions are recorded. With 48 cavities, a small sample that cannot be traced to cavity positions provides weak evidence for a balance or consistency discussion.

Identify sample cavities
Agree the sampling plan
Record approved conditions

Compare 48 with 64 only on a supported platform

If demand and machine capacity make 64 plausible, compare both while the project is still open. If 64 requires a different platform, controls or utility investment, that step must be visible in the commercial evaluation rather than hidden inside a higher mold price.

Separate mold and platform cost
Compare capacity margin
Compare maintenance burden

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

32 cavities vs 48 cavities vs 64 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	32 cavities	48 cavities	64 cavities	Buying implication
Parts per cycle	32 preforms	48 preforms	64 preforms	48 adds 16 parts over 32; 64 adds another 16 at the same cycle.
Part shot basis	32 x approved weight	48 x approved weight	64 x approved weight	Verify every option against the exact injection unit and plasticizing basis.
Capacity role	Controlled middle step	Established production step	Higher-output step	Choose the smallest supported system that meets confirmed demand with downtime margin.
Runner and controls	32-drop system	48-drop system	64-drop system	Compare zones, valve-gate actuation, connectors, spares and service access.
Selection trigger	48 capacity is unnecessary	Demand uses 48 productively	48 is already short	Do not move to 48 or 64 on forecast volume that has no operating owner.

Trial and acceptance

Make the 48-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 48 cavities

Confirm normal molding from all cavities and provide a complete 48-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 samples prepared for cavity-level trial inspection — Trial sample reference. A 48-cavity acceptance run should provide a complete cavity-identified sample set, not an untraceable handful of parts.

Closed export crates for PET preform molds — Packing reference. Confirm rust prevention, supplied spares, documents, crate marks and the shipment checklist before 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

48-cavity RFQ

Send the inputs that change this decision

A 48-cavity RFQ should include the demand calculation, exact machine and the required trial evidence. Ask for a 64-cavity comparison only when the platform can support it.

Preform drawing, weight and resin

Neck finish and application

Required output and operating plan

Exact machine technical sheet

Hot-runner and controller boundary

Cooling water and utility information

Cavity-level trial and spare-parts expectations

What happens next

01Review the part drawing, weight, neck finish and required output
02Compare 32, 48 and 64 on one cycle, machine and utilization basis
03Return the supported configuration, missing inputs and trial-evidence plan

Buyer questions

48-cavity technical FAQ

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

01What makes a 48 cavity PET preform mold a high-output project?

The project combines a larger component set with higher total shot, runner and cooling demands, more control zones, broader cavity-level evidence and greater maintenance responsibility than lower-cavity options.

02How should 48-cavity mold balance be documented?

Agree a traceable sample plan, project-specific weight or dimensional checks, gate and visual review, approved trial conditions and a record that identifies relevant cavity positions.

03When should 48 cavities be compared with 64 cavities?

Compare them when confirmed demand can use the extra capacity and the existing or planned machine, controls, cooling and maintenance resources can support both options.

04Which spare parts become important at 48 cavities?

Discuss heaters, thermocouples, valve-gate and gate components, seals, connectors, identified wear parts and any proprietary service items for the proposed system.

Next decision