Radiation-Crosslinked Plastic Guide Surface for Friction Reduction
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Solution Overview
Problem
The reduced weight and increased recycling content in plastic preforms lead to sticky PET bottles with high coefficients of friction, causing transportation delays and issues in high-performance systems, particularly when using plastic guides, resulting in a pumping effect and potential standstill of the plant.
Innovation Solution
A transport device with a guide device featuring a radiation-crosslinked plastic surface, which reduces friction by using electron or gamma radiation to crosslink the plastic, improving its hardness and temperature resistance, and optionally incorporating additional materials like graphite or spherical elements to enhance sliding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the weight of plastic preforms is reduced and recycling material proportion is increased, then production costs are saved, but the coefficient of friction increases causing containers to stick together
Solution Approach 1:
The patent applies radiation crosslinking to the guide device material to fundamentally change its physical and chemical properties. This crosslinking process modifies the molecular structure of the plastic guide material, creating a three-dimensional network that reduces the coefficient of friction with PET containers, thereby preventing sticking while maintaining the use of lightweight, recycled plastic containers.
Solution Approach 2:
The patent uses composite material construction by combining radiation-crosslinked plastic with potential additional materials to create a guide device surface that has optimized friction properties. This composite approach allows the guide device to interact with lightweight, recycled PET containers without causing sticking, resolving the contradiction between using economical containers and maintaining reliable transport.
2Ease of manufacture
If conventional plastic guide devices are used with lightweight PET containers, then manufacturing costs are reduced, but the containers stick to the guides causing transport delays
Solution Approach 1:
The patent applies radiation crosslinking treatment to the guide device material in advance, before the actual container transport process. This preliminary modification of the guide device material properties ensures that when lightweight PET containers are transported, they will not stick to the guides, thereby preventing transport delays and maintaining high productivity while keeping the guide device manufacturing simple and cost-effective.
3Productivity
If high working speeds are used to maintain productivity, then output increases, but the pumping effect and sticking problems worsen
Solution Approach 1:
The radiation crosslinking of the guide device material fundamentally changes its surface properties and friction characteristics. This parameter change in the guide device allows containers to be transported at high working speeds without experiencing the pumping effect or sticking problems that would otherwise occur, thereby maintaining both high productivity and continuous container flow reliability.
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 solution ensures safe and trouble-free transport of plastic containers, even at high speeds, by reducing friction and preventing sticking, thus preventing delays and standstills in the plant.
Implementation Method 1
the guide surface of the guide device facing the containers has a plastic crosslinked by the action of radiation
Data Source
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Figure 8a~9b
AI summary
A device (1) for treating plastic containers (10) comprising a transport device (2) which transports the containers (10) along a predetermined transport path and a guide device (20) which guides the containers (10) at least section by section during their movement along the transport path, wherein this guide device (20) is arranged such that the containers (10) at least temporarily contact a guide surface (22) of this guide device (20) and move relative to this guide surface (22) – in particular by sliding – and wherein the guide device (20) has a plastic material at least on the guide surface (22) facing the containers (10). The guide surface (22) of the guide device (20) facing the containers (10) has a plastic material cross-linked by the action of beta or gamma rays.