Removable Sleeve Mandrel for Packaging Waste Stripping
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Solution Overview
Problem
Existing waste stripping systems in packaging production machines are cumbersome and time-consuming to change, leading to inefficiencies in handling heavy cylinders and posing safety risks during tool changes, which hampers the ability to quickly adapt to varying production demands.
Innovation Solution
A waste stripping unit with a frame and two rotary tools, where at least one tool features a mandrel and a removable sleeve, allowing for quick tool changes by swapping sleeves with reduced weight and ergonomic design, minimizing infrastructure needs and reducing the risk of errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy stripping cylinders are used for waste stripping, then the stripping function is effective, but the tool change becomes time-consuming and dangerous
Solution Approach 1:
The heavy stripping cylinder is divided into two separate components: a mandrel that remains fixed in the machine and a sleeve that can be easily removed and replaced. This segmentation allows the lightweight sleeve to be changed quickly while the mandrel provides structural support and drives the stripping function, resolving the contradiction between effective stripping and quick tool change.
Solution Approach 2:
The removable sleeve is extracted as a separate replaceable component from the original monolithic cylinder. This extraction allows operators to quickly remove and replace only the sleeve portion without handling the entire heavy cylinder assembly, significantly reducing tool change time while maintaining stripping effectiveness.
2Reliability
If heavy stripping cylinders are used for waste stripping, then the stripping function is effective, but operator safety is compromised
Solution Approach 1:
By segmenting the cylinder into a fixed mandrel and a removable sleeve, the heavy mass that poses safety risks during handling is eliminated from the replaceable component. The lightweight sleeve can be safely handled and replaced without requiring heavy lifting equipment, while the mandrel remains in place providing the necessary structural integrity for effective stripping.
Solution Approach 2:
The hazardous heavy cylinder is replaced with a lightweight extracted sleeve component. This extraction removes the primary source of operator injury risk during tool changes while preserving the stripping function through the collaboration between the fixed mandrel and the replaceable sleeve.
3Adaptability or versatility
If complete cylinders are replaced for job changes, then different stripping patterns can be achieved, but the process becomes lengthy and tedious
Solution Approach 1:
The stripping tool is segmented into a permanent mandrel and interchangeable sleeves. Each sleeve can be configured with different needle patterns for different jobs, providing adaptability. The segmentation allows operators to quickly swap sleeves rather than handling complete heavy cylinders, significantly increasing job change speed while maintaining pattern flexibility.
Solution Approach 2:
A single universal mandrel can accommodate multiple different sleeves, each designed for specific stripping patterns. This multi-functionality allows the system to handle various job requirements without needing multiple complete cylinder assemblies, improving both versatility and productivity through standardized quick-change capability.
Data Source
AI summary
A waste stripping unit in a packaging production machine (1), positioned downstream of a cutting unit (3) for cutting one or more flat substrates (4). The stripping unit includes a frame (16) supporting two rotary tools cooperating with one another (17, 18). At least one of the two tools (17, 18) is formed with a mandrel (27) and a removable sleeve (28), and the sleeve can be inserted on, fixed to and driven in rotation by the mandrel (27). One tool has protruding needles for the stripping and the other tool has a flexible strip cooperating with the needles.