Adjustable Chain Gripper Opener for Die-Cutting Machines
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Solution Overview
Problem
Existing die-cutting machines with chain gripper systems face challenges in efficiently adjusting the release position of sheets and offcut pieces along a guide path, leading to potential mechanical stresses, vibrations, and reduced productivity due to fixed or inflexible chain gripper opener configurations.
Innovation Solution
The chain gripper opener is designed to be adjustable along a curved section of the guide path using a drive and linear guide, allowing the opening region to be equidistant from the guide path, which reduces mechanical stresses and vibrations, and can be automatically adjusted based on machine speed and substrate formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the chain gripper opener is fixed in position, then the mechanical structure is simple, but the release position cannot be adjusted leading to mechanical stresses and vibrations
Solution Approach 1:
The chain gripper opener is transformed from a fixed static component to a dynamically adjustable component. The opener can be positioned at different locations along the guide path according to the specific processing requirements, allowing the system to adapt to varying release position needs while maintaining operational simplicity through standardized adjustment mechanisms.
Solution Approach 2:
The guide path is divided into multiple discrete positioning locations, and the chain gripper opener can be selectively positioned at different segments along this path. This segmentation allows for precise control of the release position without requiring a completely redesign of the mechanical system, balancing adaptability with structural simplicity.
2Adaptability or versatility
If the chain gripper opener is adjusted along a curved guide path, then the release position flexibility is improved, but mechanical stresses and vibrations increase
Solution Approach 1:
The chain gripper opener is positioned to operate at a constant distance from the guide path throughout its movement along the curved section. This equipotential positioning ensures that the mechanical loads and stresses remain uniform regardless of the opener's position along the curved guide path, preventing excessive mechanical stresses and vibrations that would otherwise occur during curved motion.
3Productivity
If more chain gripper carriages are used, then the transport capacity increases, but the number of components and maintenance complexity increase
Solution Approach 1:
Instead of increasing the number of chain gripper carriages to enhance transport capacity, the system optimizes performance by adjusting the position of the chain gripper opener along the guide path. This parameter change allows the existing carriages to operate more efficiently, maximizing transport capacity without adding additional components or increasing maintenance complexity.
Data Source
AI summary
In some examples, a die-cutting machine includes a transport system configured as a chain gripper system. The chain gripper system includes a chain gripper carriage including a holding element for holding a sheet. The chain gripper carriage is arranged to be attached to at least one chain that is arranged to guide the chain gripper carriage on a guide path through at least part of the die-cutting machine. The chain gripper carriage includes a contact element functionally connected to the holding element. A chain gripper opener includes a contact surface at which, in the presence of the gripper carriage at the contact surface, the contact element cooperates with the chain gripper opener. The holding element is transferred at least from a closed position into an open position by cooperation of the chain gripper opener with the contact element. The chain gripper opener is adjustable by at least one drive.