Addex Digital Internal Bubble Cooling

Digital Internal Bubble Cooling and Layflat Control

Maintain bubble diameter and layflat by coordinating compatible internal supply and exhaust airflow. Addex DIBC uses multi-sensor bubble feedback, temperature compensation and the selected blower or valve architecture to make IBC response more repeatable on new lines and retrofits.

Bubble diameterMeasured against the target
Internal airflowSupply and exhaust coordinated
LayflatRepeatable width control objective
Addex Digital IBC equipment logoAddex is the equipment manufacturer. Gauge Advisor provides authorized Addex sales, application review and quotation support across the Western U.S. and Canada.
Addex Digital Internal Bubble Cooling system with bubble feedback, supply and exhaust control
DIBC is a controls system for compatible IBC hardware

Control the internal air path, not just one blower

The useful architecture depends on the physical IBC passage, supply and exhaust devices, sensors, film format, response requirement and line controls.

Choose the operating problem first

Why is the plant reviewing IBC control?

DIBC is most useful when the physical IBC system has compatible airflow authority but bubble size, layflat or product changes still require too much manual intervention.

01

Layflat drift

Bubble diameter changes during production and finished width moves outside the desired window.

Closed loop layflat objective
02

Manual airflow chasing

Operators repeatedly balance internal supply, exhaust or valve position to hold size.

Coordinated internal response
03

Slow width changes

Product changes consume excessive time and transition scrap while the bubble is resized.

Recipe and response review
04

Retain useful IBC hardware

The physical internal air path may remain useful but the controls lack modern feedback.

Compatibility and condition review
05

Coordinate the tower

IBC, cage position, air ring and saved setups need a clearer operator workflow.

Gen3 and Cage Control path
Application boundary: a non IBC retained air bubble needs BIDS rather than DIBC. Circumferential thickness bands need MGC or EGC review. These functions may coordinate, but they are not interchangeable.
Interactive blown film selector

Confirm whether the line needs DIBC, BIDS or another control layer

Choose the current bubble-air architecture, layflat objective, width-change needs and interacting gauge or cage requirements. The selector organizes a preliminary path before factory review.

Preliminary only: Addex application review confirms the retained hardware, sensors, blowers, valves, controls, compatibility, performance terms and responsibilities.
Addex physical Internal Bubble Cooling hardware
The control system needs a physical air path

Separate IBC hardware from Digital IBC control

Internal Bubble Cooling begins with a usable passage through the die, supply and exhaust airflow, ducting and devices that can change the internal air balance. DIBC measures bubble response and commands compatible devices. Software alone cannot create IBC capacity.

  • Confirm the die and internal cooling passage.
  • Document supply and exhaust blowers, ducts, filters and valves.
  • Verify sensor clearances and stable bubble visibility.
  • Review drive authority, I/O, interlocks and retained controls.
  • Check condition, serviceability and available airflow range.
Physical IBC foundation

Moves cooling air through the bubble

Die internals, supply and exhaust paths, blowers, ducts and applicable valves provide the mechanical airflow capacity.

Addex DIBC control

Measures and coordinates the response

Multi-sensor bubble feedback, temperature compensation, target layflat, controller logic and the configured actuators close the loop.

How the layflat loop works

Measure bubble size, compare it with the target and rebalance internal airflow

The exact device response depends on the selected DIBC configuration. The control objective remains the same: keep the measured bubble diameter and resulting layflat near the operator's target.

01 / TARGET

Enter layflat

The operator selects the required product width or recalls an approved recipe.

02 / SENSE

Measure bubble

Multi-sensor feedback observes the bubble at upper and lower cage elevations.

03 / COMPARE

Calculate error

Gen3 compares the measured diameter with the target using temperature-aware calibration.

04 / RESPOND

Adjust internal air

The configured supply, exhaust and applicable valve devices rebalance the bubble.

05 / VERIFY

Hold and monitor

The loop continues while the operator monitors frost line, stability and the complete process.

Blower-speed configuration

Coordinate supply and exhaust drives

Variable-speed control adjusts the internal air path through the selected blower architecture. Suitability depends on response, turndown, pressure, flow and the product range.

  • Confirm motor and drive compatibility
  • Review usable blower turndown
  • Document supply and exhaust authority
Valve-assisted configuration

Add faster airflow response when the application requires it

An applicable DIBC package may use a high-speed valve with the blower architecture for faster transitions. This is configuration-specific, not a universal DIBC feature or performance promise.

  • Define the width-change objective
  • Confirm film format and valve path
  • Use the written Addex configuration
Complete blown film line showing the bubble tower and internal cooling context
Reliable feedback requires a stable installation

Measure the changing bubble without publishing one universal sensor geometry

Addex DIBC uses multi-sensor feedback at upper and lower cage elevations with temperature compensation. Final sensor quantity, mounting, field of view and geometry follow the line and the written project design.

  • Preserve a clear measurement path to the bubble.
  • Review frost line range, cage motion and tower clearance.
  • Protect sensors from heat, contamination and mechanical interference.
  • Confirm the bubble surface can be measured across the product window.
  • Plan calibration and verification after mechanical changes.
Bubble feedbackActual diameter at the reviewed elevations
TemperatureCompensation for ultrasonic measurement behavior
Airflow authorityUsable supply, exhaust and valve response
Process stateStability, line conditions and operator-approved mode
Addex Gen3 operator interface for Digital IBC and blown film controls
Make bubble control repeatable by shift

Give operators one clear path from setup to automatic control

The operator still owns extrusion conditions and safe production. DIBC reduces repetitive internal-air adjustments after the process is stable and the required control mode is enabled.

Set upConfirm the product, target layflat, retained hardware, sensor signal and selected recipe.
StabilizeBring extrusion, frost line, cooling and bubble behavior into the approved operating window.
EnablePlace DIBC in the applicable automatic mode after the feedback and process state are valid.
Change widthUse the configured response while monitoring frost line, stability, line speed and film properties.
RecoverUse alarms, trends, manual commands and the approved restart procedure after an upset.
Control boundary: DIBC cannot automatically correct every extrusion consequence of a width change. Operators still manage line speed, output, temperatures, frost line, thickness target and safe operation unless separate approved systems control those functions.
Different systems, different jobs

Keep layflat control separate from gauge profile, external cooling and cage position

Gen3 can coordinate quoted modules, but the equipment layers still solve distinct physical problems.

DIBC

Controls compatible active internal supply and exhaust airflow to maintain bubble diameter and layflat.

See the control loop ↑

BIDS

Inflates or deflates contained bubble air on a compatible non IBC line.

Review BIDS →

External air ring

Cools the outside of the bubble and supports near-die stability.

Review air rings →

MGC or EGC

Changes localized external cooling to correct repeatable circumferential total film profile.

Review gauge control →
Retrofit existing hardware or engineer a new package

Retain compatible equipment only after condition and interface review

Addex is retrofit oriented, but retained equipment is not assumed. Existing IBC internals, blowers, valves, drives, sensors and controls must have the capacity, condition and authority required by the target result.

Existing IBC line

Modernize the feedback and response

Document the installed air path and determine which mechanical and electrical components can remain.

  • Model, serial, drawings and equipment photographs
  • Supply and exhaust blower curves and drives
  • Valve path, sensor layout and control authority
  • Current layflat behavior and difficult changes
New line or new IBC package

Protect the internal air path before layout freezes

Coordinate die internals, supply and exhaust sizing, ducts, valves, sensors, cage, tower, controls and service access early.

  • Define product and width-change range
  • Assign airflow and controls responsibilities
  • Plan sensor clearance and cage movement
  • Agree on commissioning and acceptance products
01 / SURVEY

Document the air path

Capture die internals, blowers, ducts, valves, sensors, cage, tower, controls and the current loss.

02 / ENGINEER

Approve interfaces

Define retained hardware, supplied equipment, drive authority, I/O, interlocks and responsibilities.

03 / INSTALL

Prepare the shutdown

Plan mechanical, electrical, sensor, network and safe-start work before equipment arrives.

04 / COMMISSION

Calibrate and tune

Verify bubble measurement, temperature compensation, response, recipes, alarms and manual recovery.

05 / ACCEPT

Run agreed products

Confirm stable layflat behavior, operator training, recovery checks and support readiness.

Project boundary: compatibility, equipment, drawings, performance, installation, commissioning, training, acceptance, service and responsibilities follow the written Addex quotation and approved project documents.
What to send for a DIBC review

Start with the physical IBC system, product range and current layflat loss

You do not need to choose the control configuration first. Send enough evidence for Addex to evaluate the internal airflow authority, sensor installation and required response.

01 / IBC HARDWARE

Die, supply and exhaust

Die and IBC design, blower curves, drives, ducts, filters, valves, nameplates, drawings and photographs.

02 / GEOMETRY

Bubble, cage and tower

Layflat and BUR range, frost line, cage, tower, sensor locations, collapsing frame and clearance.

03 / PRODUCTS

Normal and difficult recipes

Resin, structure, thickness, output, film format, width range, properties and typical process settings.

04 / PERFORMANCE

Drift and width-change evidence

Actual layflat trends, changeover time and scrap, manual adjustments, alarms and the target operating result.

Control the internal air path around the real product range

Request an Addex Digital IBC review

Send the installed IBC hardware, supply and exhaust equipment, bubble and tower geometry, product and width range, current layflat behavior, changeover evidence, controls and the result the plant needs to improve. Gauge Advisor will organize the application for Addex review and quotation.

Final scope boundary: retained hardware, selected equipment, compatibility, drawings, performance, controls, installation, commissioning, service and responsibilities follow the written Addex quotation and approved project documents.
Operating blown film bubble controlled for diameter and layflat
Blown film IBC FAQ

Questions before selecting or retrofitting Digital IBC

What is Internal Bubble Cooling on a blown film line?
IBC moves cooling air through the inside of the bubble using a physical passage through the die plus supply and exhaust airflow. It can add internal cooling capacity and provides an air path that can be controlled to influence bubble diameter and layflat.
What does Addex Digital IBC control?
DIBC measures bubble response using multi-sensor feedback and temperature compensation, compares the measured diameter with the target and coordinates compatible internal supply, exhaust and applicable valve devices. The objective is repeatable bubble diameter and layflat control.
Is DIBC the same thing as physical IBC hardware?
No. The physical IBC system provides the internal air passage, blowers, ducts and applicable valves. DIBC provides measurement, control logic, operator interface and commands to compatible devices. Software alone cannot create internal airflow capacity.
What is the difference between DIBC and BIDS?
DIBC controls active internal supply and exhaust airflow on a compatible IBC line. BIDS automatically inflates or deflates the contained bubble air on a compatible non IBC line. Both can target layflat, but the physical air systems are different.
What is the difference between DIBC and EGC?
DIBC controls bubble diameter and layflat through the internal air path. EGC uses a compatible online total film profile and localized external air ring cooling to correct repeatable circumferential gauge profile. DIBC does not measure thickness, and EGC does not control internal bubble air.
Can Addex DIBC reuse existing IBC hardware?
Potentially. Existing die internals, blowers, ducts, valves, drives or other components may remain when their condition, capacity, geometry and control interfaces support the required response. Compatibility must be confirmed through equipment data, drawings and application review.
Does every DIBC system include a high-speed valve?
No. Valve-assisted response belongs to applicable configurations. Other systems may coordinate variable-speed supply and exhaust blowers. The product range, film format, response target and existing hardware determine the useful architecture.
Will DIBC automatically control frost line and extrusion output?
No. DIBC controls the configured internal air devices around bubble diameter and layflat. Operators or separate approved systems remain responsible for output, line speed, temperatures, frost line, average thickness, film properties and safe operation.
Does DIBC guarantee a specific width-change time reduction?
No universal percentage should be assumed. The result depends on the physical IBC system, selected response devices, product range, operator workflow, process stability and written project scope. Use current plant changeover data to define the objective and acceptance method.
How does Cage Control relate to DIBC?
DIBC controls the internal air path and bubble size. Cage Control moves the physical stabilizing cage around the changing bubble. They can be coordinated through Gen3, but they remain separate control layers with different sensors, actuators and mechanical requirements.
What does Gauge Advisor do on an Addex DIBC project?
Gauge Advisor provides authorized Addex sales and applications support by defining the problem, collecting line and product data, organizing the preliminary architecture, coordinating factory review and supporting the commercial quotation. Final configuration, performance terms and factory technical determinations belong to Addex and the written project scope.

Interactive blown-film selector

Find the right blown-film cooling and control path

Describe what you want to improve and what is already on the line. The selector will explain each recommended function and its Addex product name.

5 guided stepsUsually 2–3 minutes
Gauge Advisor interactive tool

Blown Film Air Ring & Control Selector