Rotatable Plug Assembly for Foam-Insulated Register Box Manufacturing

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Solution Overview

Problem

Existing methods for forming insulated register boxes in HVAC systems are labor-intensive, inefficient, and prone to air leaks, with manual insulation application being tedious and costly, and previous conveyor systems were not suited for high production volumes or worker safety.

Innovation Solution

A plug assembly with a rotatable element and actuator is used in a conveyor-style process to seal the duct end, preventing expandable polymeric foam from entering the duct and ensuring accurate insulation application, reducing labor and material costs while improving production efficiency and worker safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual insulation application is used, then flexibility and adaptability are maintained, but labor intensity increases and production efficiency decreases

Engineering Contradiction:

Improveproduction efficiencyVSAvoidlabor intensity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The expandable polymeric foam automatically expands to fill the interior space of the register box without requiring manual shaping or positioning, eliminating the need for workers to manually apply and conform insulation material to complex geometries

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The insulation material transitions from a compact injected state to an expanded solid state through chemical reaction, changing its volume and shape parameters automatically to fill the required space, replacing manual insulation application

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conventional sealing methods are used, then simplicity is maintained, but air leakage occurs compromising system reliability

Engineering Contradiction:

Improveairtight sealVSAvoidsealing mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The rotatable element dynamically changes position between an open configuration that allows foam injection and a closed configuration that seals the duct opening, adapting its state to different process phases

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The rotatable element acts as an intermediary mechanism between the foam injection system and the duct opening, controlling material flow while maintaining sealing when closed

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If expandable foam is used for insulation, then manufacturing speed increases, but risk of foam entering duct increases causing harmful effects

Engineering Contradiction:

Improvemanufacturing speedVSAvoidfoam contamination of duct

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The rotatable element is positioned to close the duct opening before foam expansion begins, preventing foam from entering the duct in the first place rather than requiring cleanup afterward

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The rotatable element serves as a barrier intermediary between the expandable foam and the duct interior, allowing foam application to proceed rapidly while blocking contamination

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If high-volume production is pursued, then productivity increases, but worker safety concerns increase

Engineering Contradiction:

Improveproduction volumeVSAvoidworker safety

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The manual mechanical process of injecting and shaping foam is replaced with an automated conveyor system that precisely controls foam injection and sealing operations, reducing worker exposure to hazards

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system automatically performs sealing and insulation application without requiring workers to manually handle expandable foam or operate in close proximity to the process

Inventive Principle:

Principle #25Self-service

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 solution enables high-volume production of insulated register boxes with reduced labor and material costs, improved safety, and enhanced efficiency, while maintaining airtight seals and uniform insulation, addressing the inefficiencies and safety concerns of previous methods.

Implementation Method 1

The rotatable element is movable between an installation position and a sealing position

Methodology Applied

Scientific EffectRotational movement:

Implementation Method 2

expandable polymeric foam from entering the duct and ensuring accurate insulation application

Methodology Applied

Scientific EffectExpandable polymeric foam expansion:

Data Source

PatentUS12104820B2Plug with rotating flap for process for use in a forming an insulated register box

Publication Date: 2024.10.01 STERLING CUSTOM SHEET METAL INC

AI summary

A plug assembly for use in a process for manufacturing an insulated register box has a body having a bottom and at least one side wall extending upwardly from the bottom, a rotatable element at the bottom of the body, and an actuator connected to the rotatable element and positioned above the rotatable element. The rotatable element is adapted to seal an end of a duct in an interior of the box of the insulated register box. The rotatable element is movable between an installation position and a sealing position. The actuator is cooperative with the rotatable element so as to move the rotatable element between the installation position and the sealing position.