Coffee Tablet Surface Moistening and Microwave Heating
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Solution Overview
Problem
Existing methods for producing tablets from granular or powdered ingredients, such as coffee, face inefficiencies in energy consumption and production time, and are prone to dusting issues due to uniform moistening and heating processes.
Innovation Solution
A system and method involving a multi-cavity forming device with localized moistening and simultaneous heating using microwaves, where only the surface layer of the precursor is moistened, and the tablets are formed in a continuous production line with a microwave oven, allowing for efficient energy distribution and reduced treatment times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If uniform moistening and heating is applied to the entire precursor dose, then the tablet structure becomes compact and self-supporting, but dusting occurs and energy consumption increases
Solution Approach 1:
The patent applies localized moistening only to the surface layer of the precursor dose (approximately 1-2 mm depth) rather than uniform moistening throughout. This creates a moisture gradient where the surface is moistened to form a compact shell, while the inner core remains relatively dry. This local quality approach prevents dusting by binding surface particles together without unnecessarily moistening and heating the entire volume, thereby reducing energy consumption and avoiding excessive compaction that causes dusting.
Solution Approach 2:
The patent applies partial moistening action limited to the surface layer rather than excessive uniform moistening. By providing moisture only where needed (at the surface) rather than throughout the entire dose, the process achieves sufficient tablet binding and structural integrity without the harmful effects of over-moistening, which would include increased energy consumption and potential dusting from excessive heat treatment.
2Strength
If active compression is applied during microwave heating, then tablet compactness is improved, but energy consumption and production time increase
Solution Approach 1:
The patent applies preliminary active compression to the precursor dose before microwave heating begins. The dose is compressed to the desired tablet density and shape in advance, then subjected to microwave heating without continuous compression. This preliminary action approach allows the tablet structure to be formed efficiently while avoiding the redundant energy expenditure that would result from applying compression throughout the entire heating process. The compression is performed once, before heating, and maintained during heating through the forming device structure rather than continuous active compression.
3Reliability
If the entire precursor dose is heated uniformly, then complete processing is achieved, but energy consumption increases and treatment time extends
Solution Approach 1:
The patent applies localized heating through microwave irradiation focused on the surface layer of the precursor dose rather than uniform heating of the entire volume. The surface layer receives the full microwave energy treatment to achieve complete processing and tablet formation, while the inner core is heated indirectly through thermal conduction from the moisture-rich surface. This local quality heating approach ensures processing completeness at the critical surface level without unnecessarily consuming energy to heat the entire dose uniformly.
Solution Approach 2:
The patent replaces the need for prolonged mechanical heating processes with microwave irradiation, which provides rapid and efficient heating. The microwave energy directly excites water molecules in the surface layer, generating heat quickly and uniformly at the molecular level. This substitution of conventional heating methods with microwave irradiation significantly reduces treatment time and energy consumption while achieving complete processing of the surface layer, which is sufficient for tablet formation.
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 enhances productivity and reduces energy consumption while minimizing dusting by creating a robust outer shell and a less compact inner core, maintaining organoleptic properties and improving the structural integrity of the tablets.
Implementation Method 1
a microwave generator connected to a relative antenna, for directing a fixed-frequency microwave beam to the hollow body, while the mixture dose is compressed actively, and thus cause an overheating and/or a sintering of the precursor
Implementation Method 2
cause an overheating and/or a sintering of the precursor, thereby obtaining a tablet having a relatively compact and self-supporting structure
Data Source
AI summary
In a method for producing tablets for extraction of a liquid food product, dosed and moistened amounts of a powder ingredient are heated while contained in respective confined volumes. The method comprises the steps of:providing the ingredient in powder form;loading dosed amount of the powder ingredient into respective forming cavities;moistening each dosed amount of the powder ingredient, only at a surface layer thereof, andheating the dosed and moistened amount of the ingredient while contained in the respective forming cavity.