Progressive Loading Press for Ammunition with Rotating Shell Plate
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Solution Overview
Problem
Existing progressive presses for loading and reloading ammunition cartridges face issues with tall and costly designs due to vertically reciprocating lift mechanisms, off-axis loading leading to poor precision, and lack of adjustability for different cartridge sizes, limiting throughput.
Innovation Solution
A progressive press with a base featuring a plurality of cavities and nuts with screws, a reversible press motor, and a control system for optimized cycle travel and speed, allowing for adjustable tool head movement and precise control of processing operations, including a circular shell plate and primer plate for synchronized processing of multiple casings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vertically reciprocating lift mechanism is used in progressive presses, then the press can perform sequential operations on multiple casings, but the press becomes tall and costly
Solution Approach 1:
Instead of moving the tool head vertically reciprocatingly as in conventional presses, this patent inverts the approach by using a rotating shell plate that moves casings horizontally through fixed tool heads. The shell plate rotates to index casings through multiple stations, eliminating the need for tall vertical lift mechanisms while maintaining progressive processing capability
Solution Approach 2:
The patent transitions from vertical reciprocating motion to horizontal rotational motion. The shell plate rotates in a horizontal plane to advance casings through processing stations, changing the dimension of motion from vertical to horizontal. This eliminates the height requirement while preserving the progressive processing function
2Productivity
If a vertically reciprocating tool head is used, then operations can be performed on multiple casings simultaneously, but off-axis loading occurs leading to poor precision
Solution Approach 1:
The patent inverts the conventional approach by keeping tool heads fixed and rotating the shell plate with casings. This ensures that casings remain horizontally aligned with tool heads throughout processing, eliminating off-axis loading issues that occur with vertical reciprocating motion while maintaining simultaneous multi-casing operations
Solution Approach 2:
The press is segmented into multiple fixed tool head stations arranged around a rotating shell plate. Each station performs a specific operation on casings as they pass by, allowing simultaneous processing of multiple casings without the precision issues of vertical reciprocating mechanisms
3Device complexity
If a fixed design is used for progressive presses, then the structure is simple, but it lacks adjustability for different cartridge sizes
Solution Approach 1:
The patent incorporates adjustable elements within the fixed structural framework. The shell plate can be repositioned, and tool head positions can be adjusted to accommodate different cartridge sizes and configurations, providing versatility while maintaining overall structural simplicity
Solution Approach 2:
The fixed structural design incorporates universal features that can handle multiple cartridge types. The rotating shell plate mechanism and adjustable tool heads allow the same press structure to process various cartridge sizes and configurations, achieving multi-functionality without increasing structural complexity
Data Source
AI summary
A progressive press for loading or reloading ammunition casings has a base containing a reversible press motor with speed control, and vertically-oriented nuts mechanically connected to the motor and having vertically-oriented power screws extending from the nuts. The screws are affixed to a tool head which can receive dies and other tools for loading and/or reloading ammunition casings. A rotatable shell plate receives ammunition casings and advances the casings through a series of operations performed by different dies and other tools. Using a control system, the press motor can be operated to extend the screws and lift the tool head when the shell plate is advanced, and to retract the screws and tool head to perform operations on the casings when the shell plate is stationary.