Embossing Cylinder Clamping System Thermal Expansion Compensation
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Solution Overview
Problem
Existing embossing systems face challenges with clamping forces that cannot be adjusted during operation and often result in gaps in the embossing image, with clamping processes being time-consuming, especially when multiple mechanical components are involved.
Innovation Solution
An embossing cylinder with a hollow-cylindrical body and a clamping system using rotatable rings connected by a carrier with spring elements, allowing for easy assembly and length compensation due to different thermal expansion coefficients, along with an adjusting device for precise force adjustment, and a design featuring complementary comb-like contours and pins/holes for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional clamping systems with multiple mechanical components are used, then the embossing mold can be clamped securely, but the clamping process becomes time-consuming and complex
Solution Approach 1:
The clamping system is divided into a clamping ring that can be separately mounted on the embossing cylinder, allowing quick attachment and removal without complex mechanical operations. This segmentation enables rapid tool changes while maintaining secure clamping.
Solution Approach 2:
The clamping ring is designed to be mounted directly on the embossing cylinder in a nested configuration, eliminating the need for separate mounting structures. The spring element is integrated within the clamping ring assembly, reducing the number of external components and simplifying the overall structure.
2Reliability
If traditional clamping systems are used, then the embossing mold can be held in place, but gaps may appear in the embossing image and clamping force cannot be adjusted during operation
Solution Approach 1:
The spring element provides dynamically adjustable clamping force that can adapt during operation. The elastic deformation of the spring allows for automatic compensation of dimensional changes and maintains optimal clamping pressure without requiring manual adjustment mechanisms.
Solution Approach 2:
The system utilizes changes in spring compression parameters to adjust clamping force. By selecting spring elements with different stiffness coefficients or pre-compression values, the clamping force can be optimized for different embossing mold sizes and materials, ensuring consistent embossing quality without gaps.
3Manufacturing precision
If embossing sleeves made of different materials are used to compensate for thermal expansion differences, then length compensation is achieved, but the complexity of selecting and matching materials increases
Solution Approach 1:
The invention explicitly utilizes thermal expansion differences between the embossing sleeve material and the embossing cylinder material to achieve automatic length compensation during heating. The spring element's elastic properties work in conjunction with this thermal expansion to maintain dimensional stability and prevent gaps in the embossed image.
Solution Approach 2:
The system employs composite construction with the embossing sleeve made of one material (e.g., aluminum) and the embossing cylinder made of another material (e.g., steel), creating a bimetallic effect that leverages their different thermal expansion coefficients for automatic compensation without requiring complex adjustment mechanisms.
4Manufacturing precision
If brass cylinders are used for embossing, then high-quality embossing can be achieved, but the costs and effort for tool replacement become very high
Solution Approach 1:
The embossing system is segmented into a reusable embossing cylinder and a replaceable embossing sleeve. The expensive brass cylinder serves as the durable base, while the embossing sleeve can be manufactured from cheaper materials and replaced easily when worn, significantly reducing tooling costs while maintaining embossing quality.
Solution Approach 2:
The embossing sleeve is designed as a consumable component that can be manufactured from inexpensive materials and replaced when worn out. This eliminates the need to replace the entire expensive brass cylinder, reducing the cost and effort of tool maintenance while preserving the high-quality embossing surface.
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 simple, reliable, and quick clamping of sleeve-shaped embossing molds, compensating for thermal expansion differences and minimizing gaps in the embossed image, thus improving the efficiency and quality of the embossing process.
Implementation Method 1
Spring elements (13) are placed on the carrier (12) and on the first separating edge (3.1) of the hollow-cylindrical body (7), with a spring force which acts essentially in the circumferential direction of the hollow-cylindrical body (7). The spring elements (13) can be designed in particular as compression springs.
Implementation Method 2
when using different materials for the sleeve-shaped embossing mold on the one hand and the hollow-cylindrical body on the other hand, a difference in length can be compensated for, which occurs due to different thermal expansion coefficients
Data Source
Figure 1~2
Figure 3
AI summary
The forming cylinder has a hollow cylindrical body having two separating edges oriented in longitudinal direction of the body, such that a lateral surface broken by a gap is formed. A clamping system (10) is provided for expanding the hollow cylindrical body. The clamping system has two rotatable rings mounted on the hollow cylindrical body. The rings are connected by a carrier present in the gap. The spring elements are employed at the carrier and at the former separating edge. The spring force of the spring elements act in circumferential direction of the hollow cylindrical body.