Dispensing Valve With Movable Member for Liquid Pool Control
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Solution Overview
Problem
Existing dispensing apparatuses face challenges in preventing liquid pools of materials like silicone resin and epoxy resin due to volume changes at the opening and closing of valves, leading to imprecise application.
Innovation Solution
A dispensing apparatus with a novel valve mechanism featuring a movable member with first and second parts that control the communication between flow paths to prevent volume changes and liquid pooling, utilizing a unique arrangement of flow paths and a movable member to manage material circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a needle valve is inserted into a liquid chamber to control material dispensing, then the valve can switch between dispensing and recirculation modes, but volume changes occur at opening and closing timing causing liquid pooling
Solution Approach 1:
The valve mechanism is divided into separate functional components: a movable member with first and second parts, where the first part controls the first opening and the second part controls the second opening. This segmentation allows independent control of material flow paths, enabling the valve to switch between dispensing and recirculation modes without volume changes that cause liquid pooling.
Solution Approach 2:
The movable member is designed to move between different positions (first position for recirculation mode, second position for dispensing mode) to dynamically control the opening and closing of flow paths. This dynamic positioning allows smooth transition between modes without sudden volume changes, preventing liquid pooling while maintaining application precision.
2Adaptability or versatility
If a movable valve is used to control material flow in dispensing apparatus, then circulation switching is enabled, but liquid pools form due to volume changes at valve transition
Solution Approach 1:
The movable member acts as an intermediary mechanism between the first and second flow paths. By introducing this intermediate component with controlled openings, the system achieves smooth material flow transition during circulation mode switching, preventing liquid pooling and ensuring uniform material distribution without compromising circulation control versatility.
3Measurement precision
If a valve mechanism is placed immediately above the nozzle to control material flow, then dispensing control is achieved, but liquid pooling occurs due to volume changes
Solution Approach 1:
The valve mechanism is positioned immediately above the nozzle with locally optimized flow control features. The first and second openings are strategically located to control material flow at the precise location where dispensing occurs, enabling accurate dispensing control while preventing liquid pooling through localized flow management that maintains application precision.
Data Source
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AI summary
Provided are a dispensing apparatus, a movable member, and a circulation control method that can reduce or inhibit a liquid pool of a material immediately above a nozzle. A dispensing apparatus 100 according to the present invention includes: a storage unit 10 including a first flow path 43, a second flow path 44, and a third flow path 45; and a movable member 50 including a first part 51, and a second part 52, wherein the first part 51 and the second part 52 are formed in a long shape, and the second part is formed such that a cross-section crossing the longitudinal direction is smaller than that of the first part.