Helical Cutting Mechanism for Automatic Roll Wrapping Removal

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The current manual removal of wrapping from rolls of material, such as paper pulp used in diapers, poses safety risks due to the use of knives, necessitating a safer and more efficient method.

Innovation Solution

A method and apparatus that involves rotating a roll while a cutting means, inclined at specific angles, cuts the wrapping in a helical manner, allowing for automatic removal of the wrapping in one continuous piece without the need for manual knives, using a cutting means that can be moved along the roll's axis and inclined to cut the wrapping on both end and envelope surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual knife removal is used, then the wrapping can be removed, but safety risks increase and operator injury may occur

Engineering Contradiction:

ImprovesafetyVSAvoidmanual operation risk

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the manual mechanical knife system with an automated cutting system. A cutting means is mounted on a rotating arm that automatically engages with the wrapping on the roll end surface. The rotation of the arm drives the cutting means to remove the wrapping automatically, eliminating the need for operators to manually handle knives, thus improving safety while maintaining ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If automated cutting means is used, then safety is improved, but device complexity increases

Engineering Contradiction:

ImprovesafetyVSAvoidcutting apparatus complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cutting means is designed to perform multiple functions: it can cut the wrapping on the end surface of the roll, and through the rotation mechanism, it automatically progresses to remove the entire wrapping. The rotating arm structure serves both as a mounting platform and as the driving mechanism, reducing the need for separate complex components while achieving automated operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If wrapping is removed in one continuous piece, then handling efficiency is improved, but cutting precision requirements increase

Engineering Contradiction:

Improvehandling efficiencyVSAvoidcutting continuity precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The cutting means is mounted on a rotating arm that moves in a circular path around the roll. This curved motion allows the cutting means to continuously engage with the wrapping from one end of the roll to the other, cutting it in one continuous piece. The rotational motion naturally provides the precision needed to maintain continuous cutting without sharp starts or stops, achieving both handling efficiency and cutting precision.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS11458646B2Method and apparatus for removing wrapping from rolls

Publication Date: 2022.10.04 CORE LINK AKTIE BOLAGET

AI summary

In a method for removing a wrapping, such as plastic film, from a roll of material an apparatus is used, which has a roll supporting unit, and a cutting means. The roll supporting unit is configured to rotate the roll supported thereon, and the cutting means is movable into cutting abutment against the envelope surface of the supported roll for removal of the wrapping during rotation of the roll.