Fiber-Based Product Marking for Coarse Pulp Surfaces
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Solution Overview
Problem
Existing methods are inadequate for effectively marking the coarse, processed fiber surface of fiber-based products, particularly pulp-based products, for product serialization, traceability, and branding.
Innovation Solution
Ablating the pulp surface to form a three-dimensional contour using laser marking, hot stamping, or pad printing, and applying markings such as QR codes, bar codes, and logos, which can be read via machine vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional marking methods are used on fiber-based products, then the marking process is simple, but the marking quality is poor due to the coarse fiber surface
Solution Approach 1:
The patent applies preliminary action by pre-treating the fiber-based product surface before marking. The surface treatment step prepares the coarse fiber surface by smoothing or coating it, creating a suitable substrate for subsequent marking operations. This preliminary preparation enables conventional marking methods to achieve acceptable quality on otherwise unsuitable surfaces.
2Reliability
If laser marking is used to ablate the pulp surface, then durable three-dimensional markings are formed, but the processing time increases
Solution Approach 1:
The patent applies parameter changes by optimizing laser marking parameters such as power, speed, and pulse duration to achieve efficient ablation of the pulp surface. By carefully controlling these parameters, the system forms durable three-dimensional markings while minimizing processing time. The parameter optimization balances marking quality and production speed.
3Productivity
If hot stamping is used for high-speed branding, then productivity increases, but the marking precision may be reduced
Solution Approach 1:
The patent applies mechanics substitution by replacing traditional mechanical stamping with hot stamping technology. This substitution enables high-speed branding operations while maintaining acceptable precision through controlled heat application. The hot stamping process uses thermal energy instead of purely mechanical force, allowing faster processing speeds with controlled precision.
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
Enables high-speed branding and serialization of fiber-based products by forming durable, readable markings that enhance product traceability and branding.
Implementation Method 1
Ablating the pulp surface to form a three-dimensional contour (e.g., via laser marking)
Implementation Method 2
providing a heat stamp apparatus including a heating element thermally coupled to a stamping block
Data Source
AI summary
A method of marking a fiber-based product includes providing a heat stamp apparatus including a heating element thermally coupled to a stamping block and a temperature sensor thermally coupled to the stamping block. The system further includes a platen bearing an embossed pattern. Marking is accomplished by heating the stamping element to a predetermined temperature via the heating element and information acquired from the temperature sensor, then bringing the embossed pattern in relation to the surface of the fiber-based product (e.g., via direct contact and compression or simply very close to the surface) to form at least one of a corresponding three-dimensional contour and charred surface region.