Cutting Wheel with Pointed Teeth for Packaging End Closure Removal
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Solution Overview
Problem
Existing methods for removing the end closure of collapsible-type packaging often result in smearing and cold welding of packaging material, leading to difficulties in separating the filling channel walls, and either cause frequent knife wear or dust formation.
Innovation Solution
A device with a cutting wheel having pointed teeth and an abutment wheel, where the cutting wheel and abutment wheel are axially biased to create a defined cutting nip, preventing smearing and cold welding, and allowing air pockets to form for easier separation of packaging walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary cutting wheel with a flat cutting edge is used to remove the end closure, then the end closure is removed efficiently, but smearing and cold welding occur at the cut face causing the filling channel walls to stick together
Solution Approach 1:
The cutting wheel is equipped with pointed teeth instead of a flat cutting edge, creating localized stress concentration at the tips of the teeth. This localized quality change enables clean shearing action that prevents smearing and cold welding while maintaining efficient end closure removal.
2Object-generated harmful factors
If a fixed razor blade knife is used to remove the end closure, then smearing and cold welding are avoided, but the knife rapidly becomes worn requiring frequent replacement and production stoppages
Solution Approach 1:
The cutting wheel with pointed teeth provides a self-sharpening mechanism where the rotational motion and tooth geometry maintain cutting effectiveness over time. The distributed tooth structure allows continuous cutting action without the rapid wear experienced by fixed blades, eliminating frequent production stoppages.
3Productivity
If a crushing knife is used to remove the end closure, then the end closure is removed effectively, but smearing and cold welding still occur at the cut face
Solution Approach 1:
The rotating cutting wheel with pointed teeth creates a dynamic cutting action that differs from the static crushing knife approach. The rotational motion and tooth engagement produce a shearing effect with mechanical vibration characteristics that prevent material smearing and cold welding while maintaining effective end closure removal.
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 device enables reliable and simple removal of the end closure with minimal smearing and cold welding, facilitating easy separation of packaging walls by allowing air to permeate and reducing production stoppages due to knife wear or dust issues.
Implementation Method 1
a cutting wheel (20) having a circumferentially continuously extended cutting wheel cutting edge (22)... for shearing-like removal of the end closure (9)
Data Source
AI summary
The present invention relates to a device for removing an end closure (9) of a collapsible-type packaging (1), which end closure (9) closes off a channel (8) delimited by two opposing side walls (6a, 6b) of the packaging (1). The device comprises a cutting wheel (20) having circumferentially arranged, pointed teeth (21), which teeth (21) together define a circumferentially continuously extended cutting wheel cutting edge (22), which cutting wheel (20) is arranged rotatably about a first rotation axis (26), and a abutment wheel (30), which is arranged rotatably about a second rotation axis (36), which is parallel to the said first rotation axis (26), which cutting wheel (20) has a radially extended, peripheral cutting wheel face (24), which partially defines the said cutting wheel cutting edge (22), and which abutment wheel (30) has a radially extended, abutment wheel face (34), facing towards the said first cutting wheel face (24), wherein the cutting wheel face (24) of the cutting wheel (20) and the abutment wheel face (34) of the abutment wheel (30) are arranged with an overlapping contact for the formation of a cutting nip (45).