Capsule Sealing Aperture for Fast Drying Without Content Overheating
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Solution Overview
Problem
Existing methods for drying the banding liquid in capsule sealing processes can cause overheating of the capsule contents, leading to undesirable overpressure and potential separation of the shell parts.
Innovation Solution
A device with an aperture between the heat source and capsules, featuring passage and shielding areas, focuses thermal radiation onto defined areas for drying the banding liquid while minimizing exposure to the capsule contents, using infrared emitters tailored to solvent frequencies and airflow for cooling and solvent removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heat is applied to dry the banding liquid, then drying speed is improved, but capsule contents may overheat causing overpressure and shell separation
Solution Approach 1:
The aperture structure creates localized heating zones with passage areas directing heat precisely to the connection areas where banding liquid is applied, while shielding areas prevent heat from reaching capsule contents. This spatial differentiation of heat distribution enables rapid drying of the banding liquid without overheating the capsule contents, resolving the contradiction between drying speed and preventing overheating.
Solution Approach 2:
The aperture is divided into distinct passage areas and shielding areas, segmenting the heat distribution function. The passage areas (elongated openings) allow thermal radiation to reach the connection areas, while the shielding areas block radiation from reaching other capsule regions. This segmentation enables selective heating that accelerates drying while preventing harmful overheating of capsule contents.
2Area of stationary object
If thermal radiation is applied over a large area, then drying coverage is improved, but heat waste increases and capsule contents are unnecessarily heated
Solution Approach 1:
The aperture structure implements local quality by creating specific passage areas that direct thermal radiation precisely to the connection areas requiring drying. The shielding areas adjacent to the elongated openings restrict heat distribution to only where needed, preventing energy waste on areas that do not require heating. This localized heat delivery improves drying efficiency while minimizing energy loss.
3Productivity
If infrared emitters with tailored frequencies are used, then solvent sublimation rate is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by selecting infrared emitters with specific frequency ranges tailored to match the absorption characteristics of the solvent in the banding liquid. This frequency optimization maximizes solvent sublimation rate and drying efficiency. While this requires careful selection of emitter parameters, the aperture structure itself remains relatively simple, balancing productivity improvement with acceptable device complexity.
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
Accelerates the drying process, reduces heating of the capsule contents, and prevents overpressure, enabling efficient and rapid sealing with minimal device modifications.
Implementation Method 1
The subsequent drying of the banding liquid is accelerated by the introduction of heat from the heat source
Implementation Method 2
drying the banding liquid
Implementation Method 3
This retention of thermal radiation in the shielding areas can be accompanied by reflection of thermal radiation by the shielding areas
Implementation Method 4
absorption of heat by the shielding areas
Implementation Method 5
the frequency range of the infrared radiation can be tailored to the solvent used in the banding liquid, thereby selectively exciting it. This significantly increases the sublimation rate of the solvent
Implementation Method 6
significantly increases the sublimation rate of the solvent
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to a device (22) for sealing capsules (10). Each capsule has a capsule shell which is made of a first shell part and a second shell part, said shell parts being provided with a banding liquid in a connection region. The device has a heat source (30) for drying the banding liquid, and the device has at least one diaphragm (32) which is arranged in a radiation region of the heat source between the heat source and the capsules, wherein the diaphragm has at least one passage region for the passage of radiation of the heat source and for irradiating the connection regions of the capsules, and the diaphragm has at least one shielding region which shields sub-regions of the capsules which are offset to the connection region against radiation of the heat source.