Rotary Tablet Press Die Table Segmented Insert Design
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Solution Overview
Problem
Rotary tablet press die tables with exchangeable dies require high maintenance effort due to the need for precise assembly and replacement of individual die segments, leading to increased production costs and potential wear issues.
Innovation Solution
A die table design featuring cutouts for insert pieces that hold multiple dies, allowing for easier exchange and re-tooling without disassembling the table into segments, using cost-effective materials for the table and wear-resistant materials for the inserts, with locking and centering mechanisms for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If individual die sleeves are secured in die holding bores with locking means, then each die can be serviced independently, but the maintenance effort and assembly complexity increase significantly
Solution Approach 1:
The die table is divided into multiple independent die holding bores, each capable of receiving and securing individual die sleeves. This segmentation allows each die to be serviced, removed, or replaced independently without affecting other dies, thereby facilitating ease of repair while maintaining manageable assembly complexity through standardized interfaces.
2Ease of repair
If the die table is dismantled into ring segments, then replacement of worn dies becomes easier, but the assembly effort and production costs increase disproportionately
Solution Approach 1:
The die table is segmented into multiple die holding bores that can be independently accessed, allowing replacement of individual dies or small groups of dies without dismantling the entire table into large ring segments. This reduces assembly effort and production costs while still providing ease of repair.
Solution Approach 2:
Individual die sleeves are extracted from the die table as separate replaceable components, secured by locking means in their respective holding bores. This extraction allows dies to be removed and replaced independently without requiring disassembly of the entire die table structure, thereby reducing assembly effort and production costs.
3Productivity
If table segments are used to form the die table, then worn dies can be replaced without replacing the entire table, but positional accuracy requirements increase greatly
Solution Approach 1:
The die table is segmented into multiple die holding bores distributed around the rotor circumference. Each bore is independently positioned and secured, allowing replacement of individual dies or small groups without requiring high-precision assembly of large table segments. The segmented approach with standardized mounting interfaces reduces positional accuracy requirements compared to large segment assembly.
Solution Approach 2:
Individual die sleeves are extracted and replaced independently within their respective holding bores, eliminating the need to assemble large table segments with high positional accuracy. The locking means secure each die in its precise position without requiring high-precision assembly of multiple large components.
4Reliability
If exchangeable die sleeves are used, then die wear can be addressed by replacing individual sleeves, but the number of rams corresponding to each die increases maintenance effort
Solution Approach 1:
The die table is segmented into multiple independently serviceable die holding bores, each with its own locking mechanism. This allows individual die sleeves to be removed and replaced quickly without affecting adjacent dies or requiring complex disassembly procedures, thereby reducing maintenance effort while effectively managing die wear.
Solution Approach 2:
Die sleeves are extracted as independent replaceable components from their holding bores, secured by simple locking means. This extraction design allows maintenance personnel to quickly remove worn dies and install new ones without complex procedures, significantly reducing maintenance effort while maintaining reliable die wear management.
Data Source
AI summary
The invention relates to a die table (10), for a rotary tablet press, comprising a rotating rotor (1) formed from the die table (10), a punch guide (5) for the upper punch (7) and a punch guide (3) for the lower punch (4). The die table (10) comprises several exchangeable dies (11) arranged concentrically around the rotational axis of the rotor (1) and aligned with the upper and lower punches (7, 4). According to the invention, the short set-up times for changing the press to other die shapes may be achieved, whereby the die table (10) comprise at least two recesses (12) and an insert piece (20) is exchangeably inserted in each of the recesses (12) which comprises several dies (11).