Paste Syringe Plunger Venting for Residual Pressure Release
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Solution Overview
Problem
Conventional paste syringes experience internal pressure buildup leading to paste solidification and liquid seepage due to residual pressure, making it difficult to discharge the paste.
Innovation Solution
Incorporating a disc-shaped extrusion member with through holes that communicate with a residual pressure-release space behind the disc-shaped portion to release internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the screw member is rotated to move the extrusion member forward to discharge paste, then paste discharge function is improved, but internal pressure accumulates causing paste solidification and difficulty in subsequent discharge operations
Solution Approach 1:
The extrusion member is divided into a disc-shaped portion with through holes, segmenting the solid extrusion structure into a perforated design that allows pressure equalization while maintaining extrusion function
Solution Approach 2:
The through holes in the disc-shaped portion act as intermediaries, allowing residual pressure to pass through and equalize between the front and rear sections of the syringe body, preventing pressure accumulation
2Productivity
If repeated paste discharging operations are performed, then paste is gradually discharged through the discharge orifice, but residual pressure accumulates at the rear part causing paste component separation and solidification
Solution Approach 1:
The through holes serve as pressure equalization channels, allowing residual pressure to dissipate through the disc-shaped portion and prevent paste component separation
Solution Approach 2:
The pressure release space and through holes are pre-configured in the extrusion member to proactively prevent pressure accumulation before it causes paste solidification
3Productivity
If paste is subjected to repeated pressure during discharging operations, then paste is extruded through the discharge orifice, but residual pressure causes liquid to seep out of the paste
Solution Approach 1:
The through holes in the disc-shaped portion allow residual pressure to escape through the extrusion member itself, preventing liquid seepage from the paste
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
Prevents paste solidification and liquid seepage by effectively releasing internal pressure, ensuring smooth paste discharge.
Implementation Method 1
the disc-shaped portion includes at least one through hole that communicates with the residual pressure-release space
Data Source
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AI summary
The present invention provides a paste syringe that is designed to release, as much as possible, internal pressure generated inside a syringe body when a paste is subjected to pressure, thereby avoiding paste solidification or liquid seepage due to residual pressure, and accordingly avoiding difficulty in forward movement of an extrusion member. The paste syringe includes a syringe body, a nut member, a screw member, an extrusion member, and a closure member. The syringe body has a cylindrical inner periphery and includes a main section in which a paste is stored. The nut member is located at a base end of the main section of the syringe body such that the nut member and the main section are concentric, and has a cylindrical inner periphery on which a female thread is formed. The screw member includes a male thread section with a male thread formed on its cylindrical outer periphery, and an operation section located at the rear of the male thread section, and is allowed to move forward within the main section of the syringe body while being rotated in a direction of forward movement with the male thread being screwed into the female thread of the nut member. The extrusion member is located at a tip of the screw member. The closure member is detachably attached to a tip part of the syringe body to close a discharge orifice of the syringe body. The extrusion member includes a disc-shaped portion with an outer diameter corresponding to an inner diameter of the main section of the syringe body, and has a residual pressure-release space is provided behind the disc-shaped portion, and the disc-shaped portion includes at least one through hole that communicates with the residual pressure-release space.