Rotating Cutting Tool for Extruded Plastic Profiles
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Solution Overview
Problem
Current devices for cutting extruded tubes to length, especially those with thick walls, face challenges such as contamination from sawdust, inability to produce chamfers, and inefficiencies in cutting large diameters due to knife breakage and limited functionality in automatic machines.
Innovation Solution
A device with a cutting tool that is radially movable and rotatable, connected to an annular element driven axially, allowing for adjustable penetration depth and movement path via a single drive system, incorporating pneumatic or electric drives and adjustable limit switches for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a saw blade is used to cut thick-walled tubes, then the tube can be cut through, but sawdust is produced causing contamination and the waste material cannot be recycled
Solution Approach 1:
The patent replaces the traditional mechanical saw blade system with a high-speed jet stream system (water jet or air jet) to cut through thick-walled tubes. This substitution eliminates sawdust generation while maintaining effective cutting capability, directly resolving the contradiction between productivity and contamination.
2Object-affected harmful factors
If a round knife is used for chipless cutting, then contamination is reduced, but the knife breaks when cutting thick-walled large diameter tubes
Solution Approach 1:
The patent replaces the mechanical round knife system with a high-speed jet stream system that erodes and cuts through the tube material without mechanical contact. This eliminates knife breakage issues while maintaining clean cutting without contamination.
3Adaptability or versatility
If automatic cutting machines with chamfer capability are used, then chamfers can be produced, but the saw carriage is large making the cutting process slow
Solution Approach 1:
The patent uses a high-speed jet stream system that can produce both straight cuts and chamfers without requiring a large mechanical carriage. The jet stream's flexibility and speed enable rapid cutting with full functionality, resolving the contradiction between versatility and productivity.
4Adaptability or versatility
If multiple slip ring channels are used for each signal function, then all necessary functions can be implemented, but the device size increases and cost increases
Solution Approach 1:
The patent employs a universal communication interface (such as a single bus system or wireless communication) that can transmit multiple signals and control functions through a single channel, eliminating the need for multiple dedicated slip ring channels while maintaining full operational functionality.
Data Source
AI summary
A device for cutting a preferably thick-walled, extruded pipe to length, has at least one cutting tool and a receiving unit for the cutting tool. The cutting tool is radially movable in relation to the extrusion axis, is rotatable via a further component about the pipe to be cut to length, in order to cut the pipe to length, and is in operative connection with a ring element, which ring element can be moved via an axial drive, and the depth of penetration of the cutting tool and the path of movement can be defined using an adjustment unit. The depth of penetration of the cutting tool and the path of movement can be defined via the axial drive, wherein toothed rails can be moved more or less in order to achieve the desired depth of penetration.