Double-Sided Corrugated Board Laminating Assembly with Separate Web Heating

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Solution Overview

Problem

Existing corrugated cardboard systems face challenges in uniformly heating and gluing webs due to thermal insulation, leading to damage and loss of quality.

Innovation Solution

An assembly with a laminating web guide that bypasses the first pressing nip, allowing the laminating web to be heated separately and guided to a second pressing nip, preventing excessive heating and damage, while using heating elements to heat the corrugated web in the first nip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the webs are heated homogeneously to activate the glue, then the adhesive properties are activated, but the webs may be damaged or lose quality due to excessive heating

Engineering Contradiction:

Improveheating uniformityVSAvoidweb damage

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The heating process is segmented into two distinct stages: first, the corrugated web is heated in the first pressing nip to activate the adhesive; second, the laminating web is heated separately in the laminating web guide. This segmentation prevents excessive heating and damage while ensuring proper adhesive activation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different heating conditions are applied to different parts of the system: the corrugated web receives heating in the first pressing nip, while the laminating web receives heating in the laminating web guide. This local quality approach ensures each web is heated appropriately without causing damage.

Inventive Principle:

Principle #3Local quality

2Reliability

If the laminating web is heated together with the corrugated web in the first pressing nip, then the glue is activated, but the laminating web heats up too much and experiences damage

Engineering Contradiction:

Improveglue activationVSAvoidlaminating web damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The heating function for the laminating web is extracted from the first pressing nip and placed in a separate laminating web guide. This allows the corrugated web to be heated for glue activation while the laminating web is heated separately, preventing excessive heating and damage.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The laminating web guide acts as an intermediary device that provides separate heating for the laminating web. This intermediary structure enables independent temperature control, ensuring the glue is activated without damaging the laminating web.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the laminating web is guided close to the first pressing nip, then the heating efficiency is high, but the laminating web experiences excessive heating and friction

Engineering Contradiction:

Improveheating efficiencyVSAvoidfriction and overheating

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The laminating web guide is positioned at a distance from the first pressing nip in the longitudinal direction, creating spatial separation. This dimensional arrangement allows the laminating web to be heated efficiently while avoiding excessive friction and overheating that would occur if it were guided close to the pressing nip.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method ensures high-quality laminated corrugated cardboard production by avoiding undesired heating of the laminating web, maintaining web integrity and quality, particularly for printed laminating webs.

Implementation Method 1

at least one heating element for heating at least one corrugated cardboard web laminated on one side in the at least one first pressing nip

Methodology Applied

Scientific EffectThermal heating: Heating

Implementation Method 2

at least one second pressing nip, arranged downstream of the at least one first pressing nip, for pressing the at least one corrugated cardboard web laminated on one side and the laminating web against one another

Methodology Applied

Scientific EffectMechanical compression: Compression

Data Source

PatentUS12447710B2Arrangement for producing a corrugated board web laminated on both sides

Publication Date: 2025.10.21 BHS CORRUGATED MACHINEN UND ANLANGENBAU GMBH

AI summary

An assembly for producing a corrugated cardboard web laminated on both sides from a laminating web and at least one corrugated cardboard web laminated on one side has a first pressing nip for guiding the at least one corrugated cardboard web laminated on one side, and at least one heating element for heating at least one corrugated cardboard web laminated on one side in the pressing nip and a second pressing nip arranged downstream of the first pressing nip for pressing the at least one corrugated cardboard web laminated on one side and the laminating web against one another. The assembly for producing a corrugated cardboard web laminated on both sides also has a laminating web guide arranged at a distance from the first pressing nip for guiding the laminating web at a distance from the first pressing nip to the second pressing nip.