Wiper Impact Absorption in Liquid Jetting Apparatus
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Solution Overview
Problem
In liquid jetting apparatuses, the wiper's impact upon separation from the liquid jetting surface often results in vibration and scattering of adhered liquid due to the biasing force or self-weight, leading to ink dispersion.
Innovation Solution
Incorporating an impact-absorbing member in the wiper or stopper to absorb the collision impact, preventing vibration and ink scattering by using a wiper holder made of high-strength materials and a foam to absorb ink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wiper holder and stopper are formed of high-strength materials to maintain shape and posture, then structural strength is improved, but impact and shock generate vibration when the wiper separates from the liquid jetting surface
Solution Approach 1:
The patent applies beforehand cushioning by introducing a vibration-damping member made of elastic material between the wiper holder and stopper. This member is pre-positioned to absorb impact before the wiper separates from the liquid jetting surface, preventing vibration generated by the collision between high-strength components.
2Productivity
If the wiper is separated from the liquid jetting surface immediately after wiping to hit the wiper holder against the stopper, then wiping efficiency is improved, but liquid adhered on the wiper is scattered to the surroundings
Solution Approach 1:
The vibration-damping member made of elastic material is pre-positioned between the wiper holder and stopper to absorb impact before liquid scattering occurs. This beforehand cushioning allows the wiper to separate quickly from the liquid jetting surface while preventing the vibration that would cause liquid to scatter.
3Manufacturing precision
If the wiper holder is moved upwardly against the biasing force of the spring to engage at the wiping position, then positioning precision is improved, but impact force increases when the wiper contacts the stopper
Solution Approach 1:
The elastic vibration-damping member is pre-positioned between the wiper holder and stopper to cushion the impact force generated when the wiper holder is moved upwardly against the spring's biasing force. This allows precise positioning while reducing the harmful impact when the wiper contacts the stopper.
Solution Approach 2:
The patent changes the physical parameter of the stopper assembly by introducing an elastic material with specific damping properties. This parameter change allows the system to maintain positioning precision while transforming the rigid impact into a damped, controlled deceleration.
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 impact-absorbing member effectively suppresses wiper vibration and prevents ink scattering when the wiper separates from the liquid jetting surface, maintaining cleanliness and operational efficiency.
Implementation Method 1
an impact-absorbing member which is formed in the wiper or the stopper to absorb an impact generated by a collision between the wiper and the stopper
Data Source
AI summary
There is provided a liquid jetting apparatus including: a liquid jetting head which has a liquid jetting surface on which a plurality of nozzles are open to jet the liquid; a wiper which moves, relative to the liquid jetting surface, in a wiping direction along the liquid jetting surface, while being brought in contact with the liquid jetting surface, to wipe the liquid adhered on the liquid jetting surface; a wiper moving mechanism which moves the wiper in a direction orthogonal to the liquid jetting surface to approach to or separate from the ink jetting surface; a stopper which makes contact with the wiper which is separated from the ink jetting surface; and an impact-absorbing member which is formed in the wiper or the stopper and absorbs impact generated in a case that the wiper collides with the stopper.