Elastically Deformable Film Guide for Blow-Molded Tube Calibration
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Solution Overview
Problem
Existing calibration devices for film tubes produced by blown film devices are limited in their ability to adapt to varying diameters, leading to incomplete guidance and inadequate cooling, with complex and expensive designs that are not suitable for large diameters.
Innovation Solution
A calibration device with elastically deformable film guide elements that can be adjusted by introducing a fluid, such as water, between the guide element and the film tube, allowing for deformation to fit larger diameters and providing a liquid cushion for reduced friction and improved cooling, along with a force supply device to control the element's size and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanically adjustable calibration devices with finite-size film guide elements are used, then the device can be adapted to different film tube diameters, but large areas of the outer surface of the film tube remain unguided and the design becomes complex and expensive
Solution Approach 1:
The patent employs an elastically deformable film guide element that can flexibly adapt to different film tube diameters. The element is made of elastic material allowing it to deform and conform to the curved surface of film tubes with varying diameters, providing complete surface guidance without requiring complex mechanical adjustment mechanisms or multiple discrete components.
Solution Approach 2:
The patent changes the physical state of the film guide element by introducing a fluid (liquid or gas) between the element and the film tube. This fluid pressure causes the elastically deformable element to expand or contract, allowing it to adapt to different film tube diameters dynamically without mechanical adjustments.
2Adaptability or versatility
If elastically deformable film guide elements are used to enclose larger diameter film tubes, then complete circumferential guidance is achieved, but satisfactory cooling of the film tube cannot be provided
Solution Approach 1:
The patent introduces a fluid (liquid or gas) as an intermediary substance between the elastically deformable film guide element and the film tube. This fluid layer serves dual purposes: it allows the element to conform to the film tube surface for complete guidance while simultaneously enabling effective heat transfer from the film tube to the fluid, thus providing satisfactory cooling.
Solution Approach 2:
The patent utilizes hydraulic or pneumatic principles by introducing a fluid between the film guide element and the film tube. The fluid can be pressurized to maintain the elastic element's deformation and also serves as a cooling medium that efficiently removes heat from the film tube surface through convection and conduction.
3Manufacturing precision
If the film guide element surface is curved to conform to the film tube outer circumference, then complete guidance is achieved for a single diameter, but the element cannot adapt to other diameters and the design becomes complex
Solution Approach 1:
The patent transforms the static, fixed-curvature film guide element into a dynamic, adaptively deformable one. The elastically deformable element can change its curvature and shape in response to fluid pressure, allowing it to conform to the outer circumference of film tubes with different diameters while maintaining complete surface guidance for each specific diameter.
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 enables complete enclosure of the film tube with minimal damage and effective cooling, maintaining consistent radial distance from the central axis, simplifying the device structure and reducing costs while accommodating a wide range of diameters.
Implementation Method 1
the elastically deformable element can be deformed by introducing a fluid (in particular a liquid or a gas) between the guide element and the film tube
Implementation Method 2
A particularly significant advantage of the liquid cushion is its ability to effectively cool the film tube
Implementation Method 3
A particularly significant advantage of the liquid cushion is its ability to effectively cool the film tube
Implementation Method 4
a liquid column can be formed between the elastically deformable element and the outer surface of the film tube
Data Source
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AI summary
The invention describes a calibration device (1) for calibrating a film tube produced by means of a blown film device, with which (1) the film tube can be brought to a desired diameter, wherein the calibration device comprises at least one film guide element with which the film tube can be guided. The film guide element comprises at least one elastically deformable element.