Hook Cutting Head for Composite Pipe Lining Separation
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Solution Overview
Problem
Composite components with mixed materials often cannot be effectively separated for recycling due to integrated materials, leading to disposal issues, and existing methods for removing plastic pipe linings are inefficient, especially when the resin is unevenly distributed or soft.
Innovation Solution
A separating device with a cutting head featuring hook cutting sections and a guide section is used to cut out strips from the inner pipe lining of composite workpieces, allowing for the removal of the lining without tension, suitable for homogeneous and isotropic plastic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rigid cutting edge is used to cut through the plastic inner lining, then the cutting force is high, but the soft textile material compresses with folds and the resin distribution becomes uneven
Solution Approach 1:
The cutting head is divided into multiple cutting wheels arranged in series, each creating a separate cutting line. This segmentation allows the cutting process to be distributed across multiple points, reducing the compressive force on any single point and preventing material folding while maintaining effective cutting action.
Solution Approach 2:
The cutting wheels are designed to rotate during the cutting process, transforming the static rigid cutting edge into a dynamic cutting system. This rotation allows the cutting edges to continuously engage and disengage from the material, preventing compression and folding of the soft textile while maintaining cutting effectiveness.
2Ease of manufacture
If the plastic inner lining is removed by tearing with a shark's mouth device, then the lining can be removed, but the textile material compresses with folds and the process is inefficient
Solution Approach 1:
The mechanical tearing action of the shark's mouth device is replaced with a cutting system using rotating cutting wheels. This substitution transforms the removal mechanism from a brute-force tearing action to a controlled cutting process, improving both ease of removal and productivity by preventing material compression and folding.
3Reliability
If cutting wheels are used to cut through the inner lining in stages, then the material compression is reduced, but the device complexity increases
Solution Approach 1:
Multiple cutting wheels are merged into a single integrated cutting head assembly that is pulled through the pipe in one continuous motion. This merging combines multiple cutting functions into a single device, reducing overall system complexity while maintaining the reliability benefits of staged cutting.
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 reproducible and process-reliable separation of the inner pipe lining from the base body, facilitating recycling by removing the tension and allowing for easy extraction of the lining, thus preventing landfill disposal and enabling material reuse.
Implementation Method 1
the cutting head has on both sides of the guide section cutting sections for cutting out a strip from the inner pipe lining
Data Source
AI summary
In the manufacture of products, components for systems, parts in general, etc., components are often not made from a single base material, but rather represent a material mix, so that different sections of the components can be designed according to application. The invention is based on the objective of proposing a separation device for a composite workpiece which is particularly suitable for separating linings of pipe sections made of a homogeneous and/or isotropic plastic. For this purpose, a separation device (10) for a composite workpiece (1), wherein the composite workpiece (1) has a base body (2) with a pipe section (3) and an inner pipe lining (5), wherein the inner pipe lining (5) is arranged in the pipe section (3) of the base body (2), is provided with a tool (11).wherein the tool (11) has a cutting head (20) for cutting the inner pipe lining (5) in the composite workpiece (1) in a working direction (A), with a handling arrangement (12) for moving the tool (11) in the pipe area (3) relative to the composite workpiece (1), wherein the cutting head (20) has a guide section (16) facing in the working direction (A) for arrangement between the inner pipe lining (5) and the base body (2) and for guiding the cutting head (20) and/or the tool (11), and cutting sections arranged on both sides of the guide section for cutting out a strip (9) from the inner pipe lining (5), wherein the cutting sections are designed as hook cutting sections (17 a, b).