Continuous Skin Packaging Coating Apparatus for Tablets
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Solution Overview
Problem
Current tablet coating methods using volatile organic solvents are environmentally harmful, costly, and not suitable for continuous production, leading to inefficiencies and quality control issues, particularly for non-flat tablets and those requiring precise drug release profiles.
Innovation Solution
A continuous skin packaging and coating apparatus with a novel configuration of rollers, heating components, molds, and a heat-sealing plate, allowing for solvent-free, adjustable, and intelligent coating of tablets of various shapes, using a controlled film thickness and eliminating the need for explosion-proof workshops and dust recovery systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If volatile organic solvents are used for coating tablets, then coating material can be dissolved and atomized for spraying, but environmental pollution and safety hazards increase
Solution Approach 1:
The patent changes the solvent parameter from volatile organic solvents to water as the coating medium. This parameter change eliminates the harmful environmental and safety issues associated with organic solvents while maintaining the coating process functionality. The water-based coating solution is sprayed onto tablets and dried to form the coating film.
2Manufacturing precision
If batch coating process is used, then coating quality can be controlled, but production efficiency decreases
Solution Approach 1:
The patent implements a continuous coating process where tablets move through a coating pan and receive coating material continuously as they rotate. This continuous action eliminates the batch process limitations, maintaining coating quality control while significantly improving production efficiency and eliminating bottlenecks in continuous tablet production.
3Manufacturing precision
If spray coating is used, then coating material can be applied uniformly, but operational complexity and quality control difficulty increase
Solution Approach 1:
The patent employs a rotating coating pan where tablets themselves rotate and tumble during the coating process. This self-service mechanism distributes coating material uniformly without requiring complex spray gun positioning or highly skilled operational control. The rotating motion of tablets combined with the coating pan rotation achieves uniform coating with simplified operation.
4Ease of manufacture
If pan coating is used for flat tablets, then coating can be applied, but tablets stick together and coating integrity is affected
Solution Approach 1:
The patent utilizes dynamic rotation and tumbling motion of tablets in the coating pan. This dynamic movement ensures that flat tablets do not remain stationary in contact with each other, preventing sticking. The continuous motion allows coating material to be applied uniformly while maintaining coating integrity through proper drying conditions.
5Ease of manufacture
If fluidized bed coating is used for large tablets, then coating can be applied, but tablet wear and dust increase
Solution Approach 1:
The patent replaces the fluidized bed coating system with a rotating coating pan system. This substitution eliminates the high-velocity airflow required for fluidization, thereby reducing tablet wear and dust generation. The mechanical rotation of the coating pan provides sufficient coating application without the harsh conditions of fluidized bed coating.
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 method provides an environmentally friendly, cost-effective, and reproducible coating process suitable for diverse tablet shapes, ensuring uniform quality and controlled drug release, reducing waste and pollution, and enabling continuous production.
Implementation Method 1
a lower coating film heating component (4), an upper coating film heating component (5)
Data Source
AI summary
A continuous skin packaging and coating apparatus and a coating method for tablets. The continuous skin packaging and coating apparatus comprises a lower coating film unreeling roller, a waste edge reeling roller, an upper coating film unreeling roller, a lower coating film heating component, an upper coating film heating component, a first mold provided with a first tablet placing hole, a second mold provided with a second tablet placing hole, a heat-sealing plate, a cutting component, a blank tablet implanting component, and an operating mesa. The lower coating film unreeling roller and the waste edge reeling roller are provided on either side of the operating mesa. The lower coating film heating component, the blank tablet implanting component, the upper coating film unreeling roller, the upper coating film heating component, the heat-sealing plate, and the cutting component are sequentially provided above the operating mesa. The first mold is provided under the operating mesa below the blank tablet implanting component. The second mold is provided under the operating mesa below the heat-sealing plate. The upper coating film heating component is provided below the upper coating film unreeling roller.