Liquid Discharge Device Collision Acceleration Mechanism
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Solution Overview
Problem
Existing liquid material discharge devices face challenges in discharging a small amount of liquid material as a droplet efficiently, as reducing the plunger's advance distance hinders acceleration and results in misdirected droplet flight.
Innovation Solution
A liquid material discharge device with a collision member that accelerates the extrusion member by colliding with it, allowing high-speed advancement over a short distance, ensuring precise and accurate droplet discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the plunger's advance distance is reduced to discharge a small amount of liquid material, then the discharged liquid amount is reduced, but the plunger cannot be accelerated to sufficient speed resulting in poor droplet discharge quality
Solution Approach 1:
The device is divided into two separate members: the extrusion member (plunger) that directly contacts and moves the liquid material, and the collision member that provides the driving force through collision. This segmentation allows the collision member to be accelerated over a longer distance to accumulate kinetic energy, then transfer it to the extrusion member for high-speed advancement over a short distance, resolving the contradiction between small discharge volume and sufficient acceleration speed.
2Manufacturing precision
If the plunger advance distance is shortened for precise droplet discharge, then the droplet discharge accuracy is improved, but the acceleration distance is insufficient leading to inadequate plunger speed
Solution Approach 1:
The collision member performs preliminary acceleration over a longer distance before colliding with the extrusion member. This preliminary action allows the collision member to accumulate sufficient kinetic energy and velocity, which is then transferred to the extrusion member during collision, enabling the extrusion member to achieve high speed over the short advance distance required for precise droplet discharge.
3Quantity of substance
If the plunger is made thinner to reduce liquid material discharge amount, then the discharged liquid volume is reduced, but the structural strength and sealing capability are compromised
Solution Approach 1:
By separating the functions of the plunger into two members - the thin extrusion member for precise liquid displacement and the robust collision member for force delivery - the system achieves both reduced liquid volume and maintained structural strength. The collision member's larger mass and structure provide the necessary strength for high-speed collision without requiring the extrusion member to be thick.
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
Enables satisfactory discharge of a small amount of liquid material as a droplet, maintaining accuracy and efficiency even with restricted plunger advance distance, allowing for precise control and reduced size and cost.
Implementation Method 1
a collision member disposed adjacent to the extrusion member on the side opposite to the plunger and having a piston and a collision portion facing the contact portion, and driving means for advancing and retracting the extrusion member and the collision member, wherein the collision portion is collided against the contact portion such that the extrusion member is advanced at a high speed
Data Source
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AI summary
[Object] To provide a liquid material discharge device and method capable of causing a liquid droplet to be satisfactorily discharged to fly out even under a condition where discharge of a small amount of liquid material is required. [Solving Means] In a liquid material discharge method for discharging a part of a liquid material in a liquid chamber in a state of a liquid droplet from a discharge opening by advancing an extrusion member at a high speed, the method comprises a step of arranging the liquid chamber having the discharge opening through which the liquid material is discharged, the extrusion member having a plunger thinner than the liquid chamber and a contact portion, the plunger having a forward end portion which advances and retracts within the liquid chamber, and a collision member disposed adjacent to the extrusion member on the side opposite to the plunger and having a piston and a collision portion facing the contact portion, and a step of colliding the collision portion against the contact portion such that the extrusion member is advanced at a high speed to discharge the liquid material. A liquid material discharge device for carrying out the liquid material discharge method is also proposed.