Replaceable Mandrel Insert for Shrink Sleeve Labelers

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Solution Overview

Problem

Existing shrink sleeve labeler machines with two-piece mandrels face frequent damage to both upper and lower portions due to blade operation, necessitating periodic replacement.

Innovation Solution

A three-piece mandrel assembly with a replaceable cutting insert that defines the cutting slot, minimizing damage to the upper and lower mandrel elements by positioning the blades around the periphery of the insert, allowing for complete film cutting without damaging the mandrel edges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a two-piece mandrel with a cutting slot formed by interconnection is used, then film cutting is effective, but the blade damages the ends of both mandrel portions requiring periodic replacement

Engineering Contradiction:

Improvefilm cutting effectivenessVSAvoidmandrel component lifespan

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The mandrel is divided into three separate components: an upper mandrel portion, a lower mandrel portion, and a replaceable cutting insert. The cutting insert is segmented from the main mandrel structure, allowing it to be replaced independently when worn, while the upper and lower mandrel portions remain intact and continue to serve their structural and guiding functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cutting function is extracted from the main mandrel structure and placed into a separate replaceable insert. This extraction allows the cutting element to be replaced without replacing the entire mandrel assembly, thereby extending the lifespan of the mandrel components while maintaining effective film cutting capability.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If the blade is positioned to cut the film effectively, then complete film cutting is achieved, but the blade damages the mandrel edges

Engineering Contradiction:

Improvefilm cutting completenessVSAvoidblade damage to mandrel edges

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The replaceable cutting insert acts as an intermediary between the blade and the mandrel structure. The insert absorbs the mechanical stress and damage from blade operation, protecting the upper and lower mandrel portions from direct blade contact and damage. This mediator allows complete film cutting while preventing harmful effects on the mandrel edges.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9809331B2Mandrel for applying and cutting shrink sleeve material to containers

Publication Date: 2017.11.07 AXON LLC

AI summary

A mandrel assembly for use in shrink sleeve labeler machines includes a replaceable insert having a cutting slot that is spaced apart from both upper and lower elements of the mandrel assembly.