Stacked Piston Domer Assembly for Reduced Punch Impact
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Solution Overview
Problem
Existing container-forming processes experience excessive noise, vibration, and stress due to the impact of the punch engaging a fixed domer during the formation of an inwardly extending dome in cup-shaped bodies, and while a floating domer reduces force, it still applies significant pressure in a single instant.
Innovation Solution
A domer station with a stacked piston assembly, comprising multiple pistons in series, applies incremental pressure to the domer, allowing it to move between positions, distributing the force of the punch over time and reducing stress on the machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a fixed domer is used during cup-shaped body deformation, then the domer can apply sufficient force to deform the cup, but excessive noise, vibration, and stress occur due to impact
Solution Approach 1:
The patent applies beforehand cushioning by positioning a movable domer on a piston assembly before the punch engages. The piston absorbs the impact energy through controlled compression, cushioning the blow before it reaches the domer and preventing excessive noise and vibration while maintaining sufficient deformation force.
Solution Approach 2:
The movable domer mounted on the piston assembly serves as an intermediary between the punch and the cup-shaped body. The piston mediates the force transmission, allowing controlled movement that reduces impact shock while maintaining the necessary deformation force, thereby reducing noise and vibration.
2Object-affected harmful factors
If a floating domer mounted on spring and/or piston is used, then impact force is reduced, but the domer still applies significant pressure in a single instant
Solution Approach 1:
The patent segments the pressure application process by using a multi-stage piston assembly with multiple pistons arranged in series. Each piston applies pressure sequentially rather than simultaneously, dividing the single instant impact into multiple smaller pressure applications over an extended duration, thereby reducing peak impact force.
Solution Approach 2:
The multi-stage piston assembly creates periodic action through sequential piston movement. As each piston engages the domer in sequence, the pressure application occurs in periodic stages rather than as a single continuous force, extending the duration and reducing the peak impact force applied to the cup-shaped body.
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 solution effectively reduces noise, vibration, and stress by distributing the force of the punch engagement over time, allowing for complete deformation of the cup-shaped body without excessive impact, thereby improving the efficiency and reliability of the container-forming process.
Implementation Method 1
The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto
Data Source
AI summary
A domer station having a domer assembly, a housing assembly, and a stacked piston assembly is provided. The domer assembly is movably disposed within a domer body passage located in the housing assembly and structured to move between a forward, first position and a retracted, second position. The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto and are biased towards the domer. The pistons are, however, each restrained by a stop and do not contact, or operatively engage, the domer when the domer is in the domer first position.