Implant Coating and Drying Device for Polylactic Acid
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Solution Overview
Problem
The high viscosity of polylactic acid used in implant coatings leads to adhesion and incomplete coating of tablets, making it difficult to achieve uniform and stable release profiles, and current devices are not suitable for mass production due to unpredictable changes in preparation conditions.
Innovation Solution
An implant coating and drying device with a circular coating pool, stainless-steel tablet pipes, and an automatic control system that includes a blower and meshed second tablet pipe to ensure uniform coating and controlled drying, preventing adhesion and ensuring consistent coating thickness and integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polylactic acid coating solution is used to coat implant tablets, then sustained-release effect is achieved, but the high viscosity causes adhesion and incomplete coating
Solution Approach 1:
The coating process is divided into multiple sequential stages: pre-coating stage with initial coating solution, main coating stage with additional coating solution, and post-coating stage. This segmentation allows the viscous polylactic acid to be applied in controlled portions, preventing adhesion while ensuring complete and uniform coating coverage on each tablet.
Solution Approach 2:
The coating device implements dynamic control of tablet movement and coating solution flow rates. The tablet conveying speed and coating solution pumping speed are adjusted in real-time based on the coating stage, ensuring optimal coating conditions for high-viscosity polylactic acid while maintaining production efficiency and coating uniformity.
2Productivity
If multiple tablets are coated in one container simultaneously, then production efficiency is improved, but tablets stick together due to high viscosity
Solution Approach 1:
A mesh screen is introduced as an intermediary component between the coating solution reservoir and the tablets. The mesh screen distributes the viscous coating solution uniformly across multiple tablets while maintaining physical separation between tablets, preventing adhesion while enabling simultaneous coating of multiple tablets for improved productivity.
Solution Approach 2:
The device replaces manual or simple mechanical coating methods with an automated system that uses controlled fluid dynamics and mesh distribution. This substitution enables precise control of coating solution application to multiple tablets simultaneously, maintaining coating integrity while achieving mass production capability.
3Device complexity
If spray pipe coating method is used, then device structure is simplified, but coating uniformity and completeness deteriorate
Solution Approach 1:
A mesh screen is introduced as an intermediary component between the coating solution reservoir and the tablets. The mesh screen distributes the viscous coating solution uniformly across multiple tablets while maintaining physical separation between tablets, preventing adhesion while enabling simultaneous coating of multiple tablets for improved productivity.
Solution Approach 2:
The device replaces manual or simple mechanical coating methods with an automated system that uses controlled fluid dynamics and mesh distribution. This substitution enables precise control of coating solution application to multiple tablets simultaneously, maintaining coating integrity while achieving mass production capability.
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
The device achieves uniform and complete coating of polylactic acid on implant tablets, preventing adhesion and ensuring consistent release profiles, and is suitable for mass production with coating integrity over 99% and release differences less than 3%.
Implementation Method 1
a blower, an air duct, a collecting device, an automatic control system... the blower supplies wind power to the air duct through the blower pipe
Data Source
AI summary
The present invention proposes an implant coating and drying device, including a chip sorter, a slide maker, a coating pool, a tablet pipe, a tablet conveying device, and a drying device. The chip sorter is connected to the slide maker, the shape of the coating pool is a circular arc. The coating pool is filled with coating solution. The inlet of the tablet pipe is connected with the slide maker, and the outlet of the tablet pipe is connected with the drying device, the tablet conveying device is used to deliver the implant tablet within the tablet pipe. The present invention proposes an implant coating and drying device, which has the advantages of simple structure and convenient operation, and avoids the defect of the prior art that the implant tablets adhere to each other, the coating is damaged, and the release degree of the implant tablet cannot be stabilized. The present invention proposes the implant coating and drying device is suitable for mass production.