Shredder Pushing Element and Suction System for Fibre-Reinforced Plastics
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Solution Overview
Problem
Existing shredding machines struggle to effectively shred objects with different geometries and materials, particularly longer objects and fibre-reinforced plastics.
Innovation Solution
A device with a channel-shaped feed tray, a roller shredder, and a pushing element that applies high compressive forces, combined with a suction system to prevent contamination and efficiently shred objects of varying geometries and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional roller shredder with two horizontal rollers is used, then it can shred bulk material effectively, but it cannot effectively shred longer objects and fibre-reinforced plastics
Solution Approach 1:
The patent introduces a movable pushing element that can be displaced along the feed tray to apply dynamic compressive forces on objects. This dynamic mechanism allows the system to adapt to different object geometries and materials, enabling effective shredding of long objects and fibre-reinforced plastics that conventional static rollers cannot handle.
Solution Approach 2:
The pushing element acts as an intermediary between the feed tray and the roller shredder. It conveys objects to the shredder while applying compressive forces, facilitating the shredding of difficult materials like fibre-reinforced plastics by pre-compressing them before they enter the roller gap.
2Ease of operation
If a large filling opening is provided for long objects, then long objects can be easily filled into the feed tray, but the interior space is exposed to contamination during shredding
Solution Approach 1:
The patent extracts the filling function from the main shredding chamber by providing a separate feed tray with a large filling opening. Long objects can be loaded into the feed tray without exposing the shredding mechanism or ambient air to contamination. The cover then seals the feed tray during shredding, isolating the contamination risk to the feed tray interior only.
Solution Approach 2:
The system is segmented into a feed tray with removable cover and a shredding chamber. This segmentation allows the filling opening to be large for easy loading, while the cover seals the feed tray during operation to prevent contamination. The suction system further segments the contamination control by actively removing particles from the feed tray interior.
3Reliability
If high compressive forces are applied to shred fibre-reinforced plastics, then these strong objects can be shredded, but fibres and fine particles may escape into the environment
Solution Approach 1:
The patent converts the harmful effect of fibre escape into a beneficial controlled process. The suction system, which could be seen as an additional complex component, actually benefits from the high compressive forces by creating negative pressure that actively captures and removes fibres and particles at their source, preventing environmental contamination while enabling effective shredding of strong materials.
4Object-affected harmful factors
If the feed tray is enclosed with a cover during shredding, then contamination is prevented, but the pushing element must be designed to work within the enclosed space
Solution Approach 1:
The pushing element is designed with multi-functionality to operate effectively within the enclosed feed tray space. It serves both as a conveyance mechanism to move objects toward the shredder and as a compression device to apply forces on difficult materials. This universal design reduces the need for additional specialized components, managing device complexity while maintaining contamination prevention through the cover.
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 can effectively shred long and solid objects, including fibre-reinforced plastics, by applying high compressive forces and using a suction system to prevent fibre and particle escape, thus addressing the limitations of existing shredding technologies.
Implementation Method 1
a suction system, which creates a negative pressure in the interior space when shredding the objects
Implementation Method 2
a roller shredder with at least one powered roller and a further working means in the form of a roller or a comb-shaped counterpart, between which a working gap is formed in order to shred objects
Implementation Method 3
high forces of one or several tonnes of pushing force can be applied via the pushing element so that the objects are reliably conveyed to the roller shredder by the pressure
Data Source
AI summary
A device for shredding objects includes a feed tray for the reception of objects to be shredded, a roller shredder with at least one powered roller and a further working means in the form of a roller or a comb-shaped counterpart, between which a working gap is formed, in order to shred objects from the feed tray and convey them through the working gap, and a pushing element which can be moved in the feed tray and by means of which the objects to be shredded can be conveyed to the roller shredder. The feed tray can be closed on an upside by a removable cover and an interior space of the feed tray is connected to a suction device for producing a negative pressure.