Counter Reflector Shield Portions for Preform Heating
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Solution Overview
Problem
Conventional heating systems for thermoplastic objects, such as plastic preforms, face inefficiencies in energy consumption and heat distribution, leading to increased operational costs and energy losses.
Innovation Solution
The implementation of a heating installation with shield portions and a counter reflective device that focuses infrared radiation onto specific areas of the object, protecting other parts from unwanted irradiation and optimizing heat distribution by adjusting the position and configuration of reflective elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a counter reflector is used to reduce radiation losses and energy consumption, then energy efficiency is improved, but the heat distribution becomes uneven causing unwanted irradiation on certain parts of the object
Solution Approach 1:
The counter reflector is provided with shield portions at specific locations to create localized modifications in the reflection pattern. These shield portions block infrared radiation from reaching specific areas of the preform that would otherwise be unnecessarily heated, while maintaining reflective properties in other areas to reduce overall energy losses.
2Use of energy by stationary object
If IR beams are directed back onto the preform using a profiled counter reflector, then energy consumption is reduced, but control over the heat profile becomes insufficient for specific parts
Solution Approach 1:
Different portions of the counter reflector have different properties: some portions are reflective to redirect IR beams and reduce energy consumption, while other portions (shield portions) are non-reflective to prevent unwanted heating of specific areas. This allows precise control over the heat profile of different parts of the preform.
Solution Approach 2:
The counter reflector is segmented into multiple functional zones including reflective portions and shield portions. This segmentation allows independent control of heat distribution to different areas of the preform, enabling precise thermal management for specific regions such as the neck or body portions.
3Productivity
If the preform is heated uniformly, then overall heating efficiency is improved, but specific parts requiring different heating profiles cannot be treated differently
Solution Approach 1:
The counter reflector incorporates shield portions at strategic locations to create localized differences in heat distribution. This allows the majority of the preform to be heated efficiently while specific parts (such as the neck or shoulder regions) receive reduced or differential heating, enabling versatile thermal processing in a single pass.
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
This approach reduces energy consumption by minimizing radiation losses and allows for precise control of the heat profile, enabling efficient heating of specific parts of the object without additional cooling systems, thus lowering operational costs.
Implementation Method 1
heating elements (14) arranged on a first lateral wall (12) to heat the object (15) moving along a defined path
Implementation Method 2
a counter reflector (31, 32) arranged on a second lateral wall (13) opposite the heating elements (14) to reflect radiation from the heating elements (14) onto the object (15)
Data Source
Figure 1~2
Figure 3~4
AI summary
The installation (10) is adapted for heat treatment of objects, such as plastic preforms (17), and comprises two opposite lateral walls (12, 13), a first of which is provided with heating elements (14) to irradiate the objects. The second lateral wall comprises: - a first reflector (31) extending between a first and a second elongated ends; and - physically secured to the first reflector, a second reflector (32) comprising a first elongated transverse shield portion (33) adjacent to said first end and a second elongated transverse shield portion (34), an elongated cavity being defined between said first and second portions. The first elongated transverse shield portion is arranged in an intermediary position in the front face and protrudes from the front face with a proximal free end at a proximal location relative to said objects to define a cutoff shield.