Polymer Blend Dehumidification via Gravity Transfer
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Solution Overview
Problem
Existing production apparatuses for polymer-based articles face inefficiencies due to hygroscopic materials absorbing humidity during moulding or extrusion, leading to structural and aesthetic defects, despite pre-processing in heating and drying devices which are not effective.
Innovation Solution
A production apparatus is configured with a weighing and mixing unit positioned above a supply hopper, utilizing gravitational transfer and a heating and drying circuit to dehumidify the polymer blend before it reaches the transforming machine, ensuring minimal heat dispersion and humidity absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If materials are processed in a heating and drying device before mixing, then humidity absorption is reduced, but the overall efficiency and effectiveness of humidity control is insufficient
Solution Approach 1:
The weighing and mixing unit is positioned above the supply hopper, allowing materials to be weighed, mixed, and transferred by gravity before the polymer blend is formed. This preliminary preparation ensures that hygroscopic materials are handled efficiently and transferred quickly to the transforming machine, minimizing exposure time to humidity while maintaining production flow
Solution Approach 2:
The apparatus utilizes vertical positioning of the weighing and mixing unit above the supply hopper, changing from a horizontal to vertical arrangement. This dimensional change enables gravitational transfer, eliminating the need for additional heating and drying devices while effectively controlling humidity absorption through reduced transfer time
2Loss of energy
If the weighing and mixing unit is positioned at a higher level than the supply hopper, then gravitational transfer is enabled and heat dispersion is minimized, but the device complexity increases
Solution Approach 1:
The weighing and mixing unit is positioned at a higher level than the supply hopper, creating a gravitational potential difference that enables automatic material transfer. This positioning utilizes gravity as the driving force, eliminating the need for additional motors or conveyors, and minimizing heat dispersion while the vertical arrangement simplifies the overall energy system
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 configuration optimizes the polymer blend preparation by preventing humidity absorption, enhancing the production efficiency and reducing defects in polymer-based articles, such as footwear soles, by ensuring the blend is heated and dried effectively before transformation.
Implementation Method 1
a heating and drying circuit (20) which is configured to introduce a hot and dry gas inside the supply hopper (8) in order to heat and dry the polymer blend
Implementation Method 2
introduce a hot and dry gas inside the supply hopper (8) in order to heat and dry the polymer blend before being supplied to the transforming machine (2)
Implementation Method 3
Each supply hopper is therefore interposed between a weighing and mixing unit (10), from which it is separated by means of a valve (8a), and a transforming machine (2), from which it is separated by means of a valve (8b)
Data Source
Figure 1
Figure 2
AI summary
A production apparatus (1) for polymer-based articles, particularly for producing soles of footwear items, comprises: - a weighing and mixing unit (10) which is configured to prepare at least one polymer blend; - a supply hopper (8) which is connected to the weighing and mixing unit (10) in order to receive a polymer blend; - a heating circuit (20) which is configured to introduce a hot gas inside the supply hopper (8) in order to heat the polymer blend, and - a transforming machine (2) which is supplied by the supply hopper (8) and which is configured to transform the polymer blend which is received from the supply hopper (8) into one of the polymer-based articles.