Pasta Drying Control via Viscoelastic Surface State
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Solution Overview
Problem
Current pasta drying methods often result in cracking, deformation, and excessive discoloration due to high temperature and low humidity conditions, leading to prolonged drying times and poor product quality.
Innovation Solution
The method involves controlling the surface temperature and moisture of pasta dough structures to maintain a viscoelastic state within specific temperature/moisture ranges, avoiding the glass transition curve to minimize shrinkage stresses and Maillard reactions, while using sensors and a control unit to regulate the drying climate for efficient moisture removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high temperature and low humidity drying conditions are used to achieve high drying performance, then drying speed is improved, but the pasta surface becomes brittle causing cracks and deformations
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting temperature and humidity parameters during the drying process. The method uses a two-stage drying process where the first stage uses lower temperature (30-50°C) and higher humidity to maintain surface plasticity, then transitions to a second stage with higher temperature (50-70°C) and lower humidity for efficient moisture removal. This parameter optimization resolves the contradiction by preventing surface brittleness while maintaining high drying efficiency.
Solution Approach 2:
The patent applies preliminary action by conducting a pre-drying stage before the main drying process. During this preliminary stage, the pasta surface is conditioned with controlled temperature and humidity to maintain plasticity and prevent crack formation. This preparatory action ensures the surface remains flexible enough to accommodate subsequent moisture loss without deforming, thus resolving the contradiction between drying speed and shape integrity.
2Productivity
If high temperature drying is used to shorten drying time, then productivity is improved, but Maillard reactions cause excessive discoloration
Solution Approach 1:
The patent applies parameter changes by implementing a two-stage temperature profile. The first stage uses lower temperature (30-50°C) during the critical period when pasta moisture content is high and Maillard reactions are most prone to occur. After the pasta surface dries and forms a protective layer, the second stage uses higher temperature (50-70°C) to efficiently remove remaining moisture. This temperature optimization reduces Maillard reactions and discoloration while maintaining acceptable drying time.
Solution Approach 2:
The patent applies periodic action by dividing the drying process into distinct stages with different temperature and humidity conditions. The periodic alternation between low-temperature/high-humidity phases (that prevent discoloration) and high-temperature/low-humidity phases (that enable fast drying) resolves the contradiction between drying time and discoloration prevention.
3Loss of time
If rapid drying is used to increase productivity, then drying time is reduced, but shrinkage stresses cause deformation and cracking
Solution Approach 1:
The patent applies parameter changes by using controlled temperature and humidity parameters throughout the drying process. The first stage uses lower temperature (30-50°C) and higher relative humidity (60-80%) to minimize shrinkage stresses while removing surface moisture. The second stage gradually increases temperature (50-70°C) and decreases humidity to remove internal moisture without causing excessive shrinkage. This parameter control prevents structural damage while achieving efficient drying.
Solution Approach 2:
The patent applies preliminary action by conducting a controlled pre-drying stage that removes surface moisture before the main drying phase. This preliminary removal of surface moisture reduces the moisture gradient between surface and interior, thereby minimizing shrinkage stresses during subsequent drying. This prevents deformation and cracking while maintaining overall drying efficiency.
4Manufacturing precision
If extended drying time is used to maintain pasta quality, then product quality is improved, but productivity decreases
Solution Approach 1:
The patent applies parameter changes by optimizing temperature and humidity parameters to achieve high-quality drying in reduced time. The first stage uses lower temperature (30-50°C) and higher humidity (60-80%) to maintain surface plasticity and prevent defects. The second stage uses higher temperature (50-70°C) and lower humidity (40-60%) for rapid moisture removal. This optimized parameter sequence achieves both high quality and high productivity, resolving the contradiction between quality and production efficiency.
Solution Approach 2:
The patent applies continuity of useful action by implementing a continuous two-stage drying process without interruption. The transition from first stage to second stage is seamless, maintaining continuous moisture removal while adapting parameters to preserve quality. This continuous optimized drying achieves high productivity without compromising pasta quality.
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 significantly shortens drying time, prevents cracks and discoloration, and ensures high-quality pasta production with reduced energy consumption, maintaining the pasta in a viscoelastic state throughout the process.
Implementation Method 1
the pasta in the form of raw dough structures passes through states on the surface during the drying process which have different pairs of surface temperature and surface moisture. At least a portion, preferably the entire surface, of the raw dough structure remains in a viscoelastic state during at least part of the drying process
Implementation Method 2
drying the raw dough structures. When drying pasta, particular care must be taken to ensure that the raw dough structures do not suffer any negative effects such as cracking and/or excessive discoloration during the drying process
Data Source
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AI summary
The invention relates to a method for drying pasta products in which during the drying process the pasta products, which are present as raw pasta shapes, pass through surface states that exhibit differing value pairs of surface temperature (T) and surface moisture (U), and wherein during the drying process the surface of the raw pasta shapes remains in a viscoelastic state in which in a diagram of surface temperature (T) of the raw pasta shapes and surface moisture (U) of the raw pasta shapes (a.) the surface temperature (Tv) of the raw pasta shapes is not greater than 4O°C more than the temperature (Tg) on the glass transition curve of the raw pasta at the point of equal moisture of the surface, and/or (b.) the moisture (Uv) of the surface of the raw pasta shapes is not more than 20% greater than the moisture on the glass transition curve of the raw pasta at the point of equal temperature of the surface. This facilitates an especially rapid drying of the pasta products without any detriment to quality.