Rotary Press Scraping Device Positioning via Optical Feedback

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Solution Overview

Problem

Existing rotary press scraping devices often damage pellets due to incorrect positioning of scraping elements, leading to inefficient sorting and potential contamination of good tablets with damaged or broken ones.

Innovation Solution

Incorporation of an identification and/or position unit with read and/or write capabilities into the scraping element, allowing for precise determination and adjustment of the scraping element's position relative to the die plate, ensuring correct alignment and operation through communication with the machine control system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the scraping element is manually repositioned to adapt to different tablet diameters, then the scraping element can be adjusted for different pellet sizes, but the positioning precision deteriorates and tablet damage increases

Engineering Contradiction:

Improveadaptability to different pellet sizesVSAvoidpositioning precision of scraping element

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent replaces the manual mechanical positioning system with an automated optical/electronic positioning system. A camera captures images of the die plate and tablet, and a control unit processes these images to automatically determine the optimal scraping element position, eliminating manual intervention and improving positioning precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses optical copying by capturing an image of the die plate and tablet with a camera. This optical copy is then processed by the control unit to determine the scraping element's position, replacing direct mechanical measurement and positioning methods.

Inventive Principle:

Principle #26Copying

2Adaptability or versatility

If the scraping element is manually repositioned across the die plate, then adaptation to different tablet dimensions is possible, but the angle between the sorting nozzle and tablets changes, deteriorating sorting reliability

Engineering Contradiction:

Improveadaptability to different tablet dimensionsVSAvoidreliability of tablet sorting

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent replaces manual mechanical repositioning with an automated image-based positioning system. The camera and control unit calculate the optimal position and orientation of the scraping element based on the captured image, ensuring the sorting nozzle maintains the correct angle relative to the tablets regardless of tablet size or position.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system uses feedback from the camera image to automatically adjust the scraping element's position. The control unit processes the image data and determines the precise positioning required to maintain proper sorting nozzle alignment, creating a closed-loop system that ensures sorting reliability.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If manual positioning of the scraping element is performed, then adjustment for different tablet sizes is achieved, but operator error increases leading to incorrect positioning and tablet damage

Engineering Contradiction:

Improveease of adjusting scraping element positionVSAvoidcorrectness of scraping element positioning

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs self-positioning of the scraping element without requiring operator skill or judgment. The camera automatically captures the die plate and tablet, the control unit processes the images, and the system automatically determines the correct scraping element position, making the system self-sufficient and eliminating operator-related errors.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the manual mechanical positioning operation with an automated optical and electronic system. The camera and control unit substitute for the operator's visual assessment and manual adjustment, providing more reliable and consistent positioning regardless of operator expertise.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10513073B2Scraping device for a rotary press, rotary press, and method for operating a rotary press

Publication Date: 2019.12.24 FETTE COMPACTING GMBH

AI summary

A scraping device for a rotary press comprising at least one scraping element for scraping pellets located on a die plate of the rotary press to an outlet, wherein the at least one scraping element has at least one identification and/or position unit having identification and/or position data relating to the at least one scraping element, and wherein the scraping device further comprises a read and/or write unit which is designed to communicate with the at least one identification and/or position unit in order to read the identification and/or position data from the at least one identification and/or position unit. The invention also relates to a rotary press and a corresponding method.