Blister Pack Punching Carriages for Precise Guidance and Format Change
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Solution Overview
Problem
Existing punching devices for blister packs struggle with precise punch guidance, leading to potential damage and require time-consuming ejection of defective portions, and are not easily adaptable to different formats.
Innovation Solution
A punching device with movable punching elements and individually controllable carriages, driven by actuators or servomotors, allows for precise punch guidance and easy adaptation to various blister pack formats, incorporating adjustment units and spindles for horizontal displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If linear guides with very small play are used to guide punches, then punch guidance precision is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The punching device is divided into multiple independent carriages, each capable of horizontal displacement. Each carriage carries one or more punches and can be independently positioned using spindles, allowing precise punch guidance without requiring complex linear guides with very small play across the entire device.
Solution Approach 2:
The carriages are designed to be horizontally displaceable relative to the punches they carry, enabling dynamic adjustment of punch positions. This dynamic capability allows the system to adapt to different blister pack formats while maintaining precise guidance, eliminating the need for rigid, high-precision linear guides.
2Adaptability or versatility
If the punching device uses fixed punching elements, then structural simplicity is maintained, but adaptability to different formats is reduced
Solution Approach 1:
The carriages are designed to be horizontally displaceable relative to the punches they carry, enabling dynamic adjustment of punch positions. This dynamic capability allows the system to adapt to different blister pack formats while maintaining precise guidance, eliminating the need for rigid, high-precision linear guides.
3Productivity
If defective portions are punched out as blister packs, then continuous processing is maintained, but additional ejection time and error risk are introduced
Solution Approach 1:
The control unit receives information about defective portions from detection devices and uses this feedback to selectively activate or deactivate specific punches. This allows the system to identify and exclude defective portions from punching operations, preventing their inclusion in the final product while maintaining continuous processing flow.
Solution Approach 2:
The control unit selectively activates or deactivates specific punches based on the location and nature of defective portions. This localized control allows different regions of the blister strip to be processed differently, ensuring that defective portions are excluded while maintaining continuous processing of good portions.
Data Source
AI summary
A punching device for punching out blister packs from a blister strip has at least a first and a second punching element. The first punching element has a plurality of punches and the second punching element has a die. The first punching element is movable back and forth in a punching direction in such a way that the punching device alternately assumes an open position and a closed position. During operation of the punching device, each punch is connected to at least one of a plurality of carriages. In the idle state of the punching device, the carriages are displaceable relative to the associated punch in a direction which is perpendicular to the punching direction.