Pouch Film Molding with Localized Stripper Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing pouch molding apparatuses fail to uniformly and strongly press pouch films around the cup part molding position, leading to wrinkles and potential cracks, which affect the molding quality and energy density of secondary batteries.
Innovation Solution
A pouch molding apparatus with a second stripper that protrudes from the bottom surface of the first stripper, forming a ring shape with a friction coating layer, and an adjustable pressing force mechanism to ensure uniform and strong pressure on the pouch film, minimizing wrinkles and fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide pressing surface is used on the stripper area, then the pouch film can be held over a large area, but the surface pressure becomes insufficient and the pouch film is not strongly held around the cup part
Solution Approach 1:
The pressing surface is designed with non-uniform pressure distribution, concentrating pressure at the cup part molding position where it is most needed, rather than distributing it uniformly across the entire pressing surface. This allows the wide pressing surface to maintain adequate overall pressure while providing enhanced localized pressure at critical areas.
Solution Approach 2:
The pressing surface is divided into multiple pressing elements or zones, allowing different regions to apply different pressure levels. The cup part molding position receives higher pressure from dedicated pressing elements, while other areas provide supporting pressure to hold the pouch film in place.
2Stability of the object's composition
If uniform surface pressure is applied on the stripper area, then the pouch film is fixed evenly, but the pouch film is not strongly held around the cup part molding position where stretching occurs
Solution Approach 1:
The pressing surface applies non-uniform pressure with higher concentration at the cup part molding position, matching the local requirement for stronger holding where stretching occurs, while maintaining adequate uniform pressure in other areas for overall fixation.
Solution Approach 2:
The pressing mechanism is designed to dynamically adjust pressure distribution during the molding process, increasing pressure at the cup part position when stretching occurs and reducing it in other areas, thereby adapting to the changing requirements of the pouch film.
3Manufacturing precision
If the pouch film is not strongly held around the cup part, then wrinkles occur around the pouch molding part, but applying stronger pressure uniformly across the surface reduces molding precision
Solution Approach 1:
Pressure is concentrated at the cup part molding position where wrinkles and cracks are most likely to occur, providing strong holding precisely where needed to prevent these defects, while avoiding excessive uniform pressure that would compromise overall molding precision.
Solution Approach 2:
The pressing surface is segmented into high-pressure zones at the cup part position and lower-pressure zones in surrounding areas, allowing targeted prevention of wrinkles and cracks without applying excessive pressure that would affect the precision of other molded features.
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 apparatus effectively minimizes wrinkles and fractures, improving the molding quality and achieving space efficiency and maximum energy density of the cup part.
Implementation Method 1
a friction coating layer, and an adjustable pressing force mechanism
Data Source
AI summary
A pouch molding apparatus includes a die plate, a first stripper, a punch part, and a second stripper. The die plate has a flat plate shape so that a pouch film is seated on an upper portion thereof and has a molding hole having a shape passing through top and bottom surfaces of the die plate. The first stripper is configured to press and fix the pouch film to an upper side of the die plate and has a punch hole at a position at a position corresponding to the molding hole. The punch part is drawn in and out of the punch hole of the first stripper and the molding hole of the die plate to mold the pouch film. The second stripper protrudes from a bottom surface of the first stripper along a circumference of the punch hole in order to press and fix the pouch film.