Dual-Turret Die Insertion for Precise High-Speed Tableting

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Solution Overview

Problem

Existing rotary tableting machines face challenges in accurately and reliably inserting objects into dies at high speeds due to complex control systems and susceptibility to malfunctions, with prior solutions lacking precision and repeatability in positioning.

Innovation Solution

An apparatus with a second turret that allows radial and tangential control of object movement, mimicking the die's path over an angular range, enabling synchronous insertion and reducing dependency on time-based positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a complex control system is used to eject the object at exactly one intersection point, then positioning precision is improved, but device complexity and reliability deteriorate

Engineering Contradiction:

Improvepositioning precisionVSAvoidcontrol system complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The invention extracts the complex control system and time-based positioning dependency from the insertion process. Instead of using complex control to eject at exact intersection points, the system uses a simpler approach where the object holder follows the die's circular path independently, and the object is inserted when the holder's radial position allows, eliminating the need for complex timing control.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention introduces an intermediary approach by having the object holder rotate independently on a parallel circular path. This intermediary rotation allows the holder to passively follow the die's motion pattern without direct control linkage, enabling synchronization through geometric relationship rather than active control.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If gripper arms move radially on the turret to follow the curved path of dies, then path tracking is improved, but path speed difference causes loss of synchronization

Engineering Contradiction:

Improvepath tracking precisionVSAvoidsynchronization reliability

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The invention applies dynamics by allowing the object holder to have independent rotational movement on a parallel circular path. This dynamic independence enables the holder to adjust its angular position relative to the die table, maintaining synchronization over a larger angular range without being constrained by fixed radial movement on the turret.

Inventive Principle:

Principle #15Dynamics

3Volume of moving object

If radial arms are arranged directly on the driving turret, then construction volume is reduced, but malfunctions increase and retrofitting becomes difficult

Engineering Contradiction:

Improveconstruction volumeVSAvoidsystem reliability

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The invention segments the insertion device into a separate rotating assembly that operates independently from the main tableting machine turret. This segmentation allows the object holder to be mounted on a parallel circular path with independent rotation, reducing mechanical interference and improving reliability while maintaining compact dimensions.

Inventive Principle:

Principle #1Segmentation

4Productivity

If objects are fed individually to dies with time-based positioning, then insertion speed is improved, but positioning precision deteriorates

Engineering Contradiction:

Improveinsertion speedVSAvoidpositioning precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The invention replaces time-based positioning control with a geometric positioning system. Instead of controlling insertion timing, the system uses the spatial relationship between the object holder's circular path and the die table's reference circle to automatically position objects. This mechanical geometric relationship provides precise positioning independent of timing, allowing high-speed operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20250346010A1Device for inserting at least one object into at least one die of a tabletting machine

Publication Date: 2025.11.13 KORSCH AG DE

AI summary

The invention relates to an apparatus for inserting at least one object into at least one die of a tableting machine, in which the at least one die is arranged on a reference circle in a turret driven to rotate about a first axis of rotation. The apparatus comprises a second turret that can rotate about a second axis of rotation. The second turret also exhibits at least one object holder, wherein the at least one object holder comprises holding means which enable the at least one object to be picked up, transported and released. The movement path of the at least one object can be controlled radially and tangentially in relation to the rotational movement of the second turret via the at least one object holder, such that the movement path of the at least one object can imitate the movement path of the at least one die, at least over an angular range of rotation of the second turret.