Radial Insertion Cutting Ring for Corrugated Plastic Pipes
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Solution Overview
Problem
Conventional cutting devices for plastic pipes, particularly corrugated ones, are cumbersome and expensive, and fail to ensure straight cuts necessary for proper welding, which is critical for corrugated pipes where cuts must align with crests or troughs for neat fitting.
Innovation Solution
A multi-part device with a housing and cutting ring system that allows radial insertion of the pipe and easy rotation of cutting blades, featuring a drive mechanism with a gear system for efficient cutting, enabling straight cuts without axial insertion and accommodating different pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional cutting devices are used for plastic pipes, then cutting function is provided, but handling is cumbersome and cost is high
Solution Approach 1:
The housing is divided into two separable housing halves that can be opened and closed like a clamp. This segmentation allows the device to be opened for easy pipe insertion and closed for stable cutting operation, resolving the contradiction between ease of operation and device stability.
Solution Approach 2:
Instead of inserting the pipe axially through the device as in conventional designs, the pipe is inserted radially from the side when housing halves are open. This inverted insertion approach dramatically simplifies handling while maintaining cutting functionality.
2Ease of manufacture
If conventional cutting devices are used for plastic pipes, then cutting function is provided, but production cost is high
Solution Approach 1:
The cutting ring is segmented into multiple sections that can be independently positioned and adjusted. This allows for precise alignment of cutting blades to ensure straight cuts while using simpler, more cost-effective manufacturing methods for each individual section.
Solution Approach 2:
The device incorporates adjustable cutting ring sections that can be repositioned to accommodate different pipe diameters and cutting requirements. This multi-functionality reduces the need for multiple specialized cutting devices, lowering overall production costs while maintaining precision.
3Manufacturing precision
If cuts are made on corrugated plastic pipes, then pipe sections can be connected, but cuts must align with crests or troughs for neat fitting
Solution Approach 1:
The cutting ring sections are pre-adjusted and pre-positioned before the cutting operation begins. This preliminary positioning ensures that the cutting blades are correctly aligned with the corrugation pattern, guaranteeing that cuts will align with crests or troughs without requiring complex real-time adjustments during operation.
Solution Approach 2:
The device replaces complex mechanical alignment mechanisms with a simplified system where cutting ring sections can be manually positioned and locked. This substitution maintains precise cut alignment while significantly improving ease of operation.
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
The device simplifies handling, reduces production costs, and ensures straight cuts through the pipe, facilitating easy assembly and welding by allowing cuts along either the crest or trough of corrugated pipes, enhancing accessibility and weldability.
Implementation Method 1
a cutting blade (30) which protrudes radially inwards at least partially into the tube-receiving space (8)
Data Source
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AI summary
The invention relates to an apparatus (1) for cutting plastic pipes (6), in particular corrugated plastic pipes (6), comprising: a multi-part housing (2), having a first housing part (2a) and a second housing part (2b), which can be displaced relative to one another between an open position and a closed position, wherein the housing parts (2a, 2b) in the closed position form a pipe-receiving space (8) for at least partially receiving the plastic pipe (6); a multi-part cutting ring (20), which has a first cutting ring portion (20a) and a second cutting ring portion (20b), which are formed separately from one another and are arranged displaceably relative to the housing parts (2a, 2b), wherein the cutting ring portions (20a, 20b) in the closed position of the housing parts (2a, 2b) are arranged such that they extend around the pipe-receiving space (8), and wherein at least one of the cutting ring portions (20a, 20b) has a cutting blade (30) protruding radially inwards at least partially into the pipe-receiving space (8); and a driving device (22, 28; 44, 46) for driving the cutting ring (20) in rotation; wherein in the closed position of the housing parts (2a, 2b) the plastic pipe (6) can be fixed in the pipe-receiving space (8), and in the open position of the housing parts (2a, 2b) the plastic pipe (6) can be introduced substantially in the radial direction into the opened pipe-receiving space (8).