Diaper Core Forming and Bonding for Compact Packaging

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Solution Overview

Problem

Current diaper manufacturing processes face inefficiencies due to high waste generation and machine downtime, as well as the need for post-production identification and separation of defective products, which increases operational costs and reduces yield.

Innovation Solution

The implementation of a high-speed web processing system that includes a core forming unit, cutting unit, and bonding units for forming and assembling diaper components, allowing for pre-orientation of stretch materials and efficient folding for compact packaging, while enabling the removal of material chips to create contoured leg openings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If traditional diaper manufacturing processes are used, then production can proceed with standard equipment, but waste generation increases and machine downtime occurs requiring post-production defect separation

Engineering Contradiction:

Improvewaste generationVSAvoidproduction efficiency

Core Design Contradiction:

Loss of substanceVSProductivity

Solution Approach 1:

The patent applies preliminary action by implementing real-time defect detection during the manufacturing process rather than after production. The system detects defects as they occur and automatically eliminates defective products at the source, preventing waste generation and avoiding machine downtime associated with post-production sorting and separation operations.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If real-time defect detection and elimination is implemented, then product quality improves and waste reduces, but system complexity increases

Engineering Contradiction:

Improveproduct qualityVSAvoidsystem complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical defect detection and separation systems with a combination of sensors, controllers, and automated elimination mechanisms. This substitution reduces overall system complexity while maintaining high manufacturing precision through real-time monitoring and immediate defect elimination without requiring manual intervention or complex post-production sorting equipment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If high-speed web processing is implemented, then production speed increases, but the footprint of the machine increases

Engineering Contradiction:

Improveproduction speedVSAvoidmachine footprint

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The patent merges multiple functions into integrated units: the defect detection sensors are positioned along the web processing line to monitor products in real-time, and the defect elimination mechanism is integrated directly into the production flow. This consolidation allows high-speed processing without requiring separate dedicated spaces for detection and elimination operations, thus maintaining a compact machine footprint while achieving high productivity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9289329B1Method for producing pant type diapers

Publication Date: 2016.03.22 JOA CURT G INC

AI summary

A core forming unit feeds a core to a cutting unit, where a core is wrapped with a core topsheet and backsheet. The core insert is folded and a front wing web and a back wing web are coupled to the folded core. If a pant type diaper is desired, side seams of the front wing web and back wing web are bonded together at side seam regions. Next, portions of the front wing web and back wing web are folded over to create a compact product for packaging and shipment.