Pneumatic Core Adhesive Dispensing for Log Production

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Solution Overview

Problem

Existing methods for applying adhesive to cores for log production are imprecise, lead to adhesive overflow and machine soiling, require complex maintenance, and are not adaptable to changing core dimensions or product characteristics.

Innovation Solution

A device with movable dispensing means that applies adhesive in a rectilinear and continuous strip along the core, allowing for precise application and adjustment based on core diameter and product length, using a closed adhesive system to prevent waste and soiling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the overflow method is used to apply adhesive to cores, then adhesive application is simple, but precision is poor and machine soiling occurs

Engineering Contradiction:

Improveadhesive application simplicityVSAvoidadhesive application precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical overflow method with a pneumatic spray system. A spray nozzle delivers adhesive through compressed air in a controlled manner, transforming the adhesive from liquid to aerosol form for precise deposition on the core surface without overflow or soiling.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention uses pneumatic power to drive the adhesive spray nozzle. Compressed air is introduced through a channel in the nozzle to atomize and propel the adhesive onto the core, enabling precise control of adhesive application while eliminating the problems of the overflow method.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Productivity

If a moveable blade is used to collect and apply adhesive, then adhesive can be applied cyclically, but synchronization precision is difficult to maintain and the blade gets dirty

Engineering Contradiction:

Improveadhesive application cycle rateVSAvoidsynchronization precision

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent replaces the mechanical moveable blade system with a pneumatic spray nozzle. The spray nozzle remains stationary while adhesive is delivered continuously through compressed air, eliminating synchronization issues and preventing the nozzle from contacting or soiling the adhesive reservoir.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If batteries of dispensers with multiple nozzles are used, then adhesive can be sprayed along the entire core length, but maintenance complexity and cost increase

Engineering Contradiction:

Improveadhesive coverage along core lengthVSAvoidnumber of dispensing nozzles

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent employs a movable spray nozzle that travels along the core length during rotation. This dynamic positioning allows a single nozzle to cover the entire core surface area, replacing the need for multiple stationary nozzles and significantly reducing system complexity while maintaining complete adhesive coverage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The single spray nozzle is designed to perform multiple functions: it can adjust its position along the core length, adapt to different core diameters, and provide complete adhesive coverage. This universal nozzle replaces the entire battery of multiple specialized nozzles, simplifying maintenance and operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Productivity

If traditional adhesive application methods are used, then adhesive can be applied to cores, but adaptation to changing core dimensions and product characteristics is difficult

Engineering Contradiction:

Improveadhesive application speedVSAvoidadaptability to core dimension changes

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The spray nozzle system incorporates adjustable positioning mechanisms that allow rapid adaptation to different core diameters and lengths. The nozzle can be moved radially and axially to maintain optimal spray distance and coverage, enabling quick reconfiguration for varying product specifications without sacrificing application speed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system allows adjustment of spray parameters including nozzle position, spray pressure, and adhesive flow rate to optimize performance for different core dimensions and product requirements. These parameter changes enable flexible adaptation while maintaining high productivity across various production scenarios.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10946409B2Device and method for applying adhesive to cores by a dispensing means while the cores move along a feed direction, the cores used to produce a log

Publication Date: 2021.03.16 GAMBINI SPA

AI summary

A device (1) applies adhesive to cores which are used to produce a log includes a moving means (3) configured to cause at least one core (5) to advance along a feed direction (A) and a dispensing means (7) configured for dispensing an amount of adhesive (9) on the core (5). The dispensing means (7) are moveable along an application direction (B) substantially orthogonal to the feed direction (A) and are configured to selectively dispense an amount of adhesive (9) along portions (11) of the core (5) during movement along the application direction (B).