Switch Plate Sealant Nozzle Eliminates Valve Delay

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Solution Overview

Problem

Existing sealant applying devices for liquid crystal display panels face issues with response delay and sealant piling due to the use of electromagnetic valves, leading to uneven coating and complex control parameters, and the need for precise control over sealant discharge to prevent sealant accumulation.

Innovation Solution

A sealant applying device with a switch plate that horizontally moves between two states to control sealant discharge, incorporating a clearing unit for surface cleaning and a suction unit to prevent sealant piling, allowing for precise control over sealant application and eliminating the need for electromagnetic valves.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electromagnetic valves are used to control sealant discharge, then sealant discharge can be controlled, but response delay occurs and control parameters become complex

Engineering Contradiction:

Improvesealant discharge controlVSAvoidresponse delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent removes the electromagnetic valve from the system entirely and replaces it with a mechanical switch plate structure. The switch plate with through holes directly controls sealant discharge by its position, eliminating the electromagnetic valve's response delay and complex control parameters while maintaining reliable sealant discharge control.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the electromagnetic valve (electromechanical system) with a purely mechanical switch plate structure. The switch plate's horizontal movement between different positions mechanically controls sealant discharge without requiring electromagnetic actuation, thereby eliminating response delays associated with electromagnetic valves.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If electromagnetic valves are used to control sealant discharge, then sealant discharge can be controlled, but sealant piling occurs leading to uneven coating

Engineering Contradiction:

Improvesealant discharge controlVSAvoidcoating uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent removes the electromagnetic valve that causes sealant piling and replaces it with a switch plate structure that provides precise control over sealant discharge. The switch plate's controlled positioning ensures uniform sealant flow, eliminating the piling problem while maintaining discharge control reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The switch plate is designed to be positioned in advance at appropriate locations to control sealant discharge. By pre-positioning the switch plate in specific horizontal locations, the system ensures proper sealant flow control before discharge occurs, preventing sealant piling and ensuring uniform coating.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the switch plate blocks the sealant outflow portion, then sealant discharge is prevented, but sealant remains in the discharge portion causing potential piling

Engineering Contradiction:

Improvesealant discharge controlVSAvoidsealant accumulation

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The suction unit is activated in advance when the switch plate moves to block the sealant outflow portion. This preliminary action draws out sealant from the discharge portion before it can accumulate, preventing waste while maintaining the reliability of sealant discharge control through the switch plate mechanism.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The suction unit acts as an intermediary between the blocked sealant outflow and the discharge portion. When the switch plate blocks the outflow, the suction unit mediates by drawing out the sealant from the discharge portion, preventing accumulation and waste while allowing the switch plate to maintain its blocking function.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 timely control over sealant discharge, preventing sealant piling and ensuring uniformity and improved coating quality, reducing the complexity of control parameters and eliminating response delays.

Implementation Method 1

the suction pump is configured to perform a vacuumizing treatment on the air suction pipe

Methodology Applied

Scientific EffectVacuum: Vacuum

Implementation Method 2

the air inlet unit is configured to output air to the nozzle to allow a preset air pressure in the nozzle

Methodology Applied

Scientific EffectAir pressure: Pressure Increase

Data Source

PatentUS10232392B2Sealant applying device and working method thereof, and sealant applying apparatus

Publication Date: 2019.03.19 BOE TECHNOLOGY GROUP CO LTD

AI summary

A sealant applying device and a working method thereof, and a sealant applying apparatus are disclosed. The sealant applying device includes a nozzle; the nozzle includes an air inlet portion and a sealant outflow portion, a switch plate is arranged below the sealant outflow portion, the switch plate includes a plate body configured to horizontally move between a first state and a second state, one end of the plate body is provided with a through hole, and a discharge portion is provided at a position corresponding to the through hole and on a side of the plate body facing away from the sealant outflow portion.