Variable Circumference Roller for Embossment Registration
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Solution Overview
Problem
Existing methods for creating embossments on floor covering materials, such as vinyl tiles, face challenges in maintaining the position of the embossment structure in register with the printed motif during production, leading to deviations and impaired appearance, particularly with thermoplastic materials that are less permanently deformable and require precise control.
Innovation Solution
A method using a roller with a variable circumference, where the length of the circumference is altered to adjust the distance of the embossment pattern on the material web to match the printed motif, allowing for continuous production without stretching the material web, and utilizing replaceable embossing elements to ensure precise registration and long contact times for better structure retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a roller with fixed circumference is used to create embossments, then the production process is simple and continuous, but the embossment structure cannot maintain precise registration with the printed motif due to cumulative deviations
Solution Approach 1:
The roller is designed with a variable circumference that can be dynamically adjusted during operation. The circumference is made variable by providing the roller with segments that can be displaced radially, allowing the embossment pattern distance to be adapted to match the printed motif pattern distance, thereby maintaining precise registration without cumulative deviations
Solution Approach 2:
The physical parameter of the roller circumference is made changeable. By displacing segments radially, the effective circumference of the roller can be increased or decreased, which directly changes the distance of the embossment pattern on the material web, enabling precise matching with the printed motif
2Manufacturing precision
If the material web is stretched to maintain embossment registration, then registration precision is improved, but the method is only suitable for thin, stretchable material webs and excludes glass fiber-reinforced vinyl
Solution Approach 1:
Instead of stretching the material web, the roller circumference is made dynamic and adjustable. This allows the embossment pattern distance to be adapted to match any printed motif pattern distance regardless of material web type, making the method suitable for both thin stretchable materials and rigid glass fiber-reinforced vinyl
Solution Approach 2:
The roller circumference parameter is made variable through radial displacement of segments, allowing the embossment pattern distance to be changed to match different printed motif patterns. This eliminates the need to stretch the material web and enables processing of various material types including glass fiber-reinforced vinyl
3Manufacturing precision
If the roller and material web are moved at the same speed, then the production process is simple, but the embossment structure falls out of register with the printed motif due to pattern distance mismatches
Solution Approach 1:
The roller circumference is made dynamically adjustable during operation. By radially displacing segments, the circumference can be changed to match different printed motif pattern distances, allowing the roller and material web to continue moving at the same speed while maintaining precise embossment registration
Solution Approach 2:
The roller circumference parameter is made variable, allowing the embossment pattern distance to be adjusted to match the printed motif pattern distance. This enables continuous production at constant speeds while achieving precise pattern matching
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 approach enables the creation of high-quality, registered embossed products with embossments that retain at least 80% of their structure depth, suitable for vinyl-based floor coverings, by maintaining precise alignment and ensuring the embossments are in register with the printed motif, improving the appearance and durability of the final product.
Implementation Method 1
at least said substrate layer comprises a thermoplastic synthetic material and preferably substantially consists of such thermoplastic synthetic material
Implementation Method 2
the material of the material web will spring back elastically, certainly in the case when this material, at least in the case of thermoplastic material, already has cooled down more or less and thus is less permanently deformable
Implementation Method 3
the length of the circumference is altered to adjust the distance of the embossment pattern on the material web
Data Source
AI summary
A method for manufacturing a product having a surface provided with embossments, includes bringing a material web is in contact with a roller. The roller is provided with a relief at its surface, with which, via this relief, embossments are formed in the material web. The roller has a circumference of which, or at least certain parts thereof that are variable, or alternatively the circumference of the roller is variable by making use of embossing elements, wherein the mutual angular position thereof is adjustable.