Liquid Discharge Device for Conic Media
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Solution Overview
Problem
Existing liquid discharge devices face challenges in maintaining the quality of the discharged liquid material when discharging to media with varying curvature, as the relative moving distance between the medium and the discharge unit per unit time leads to inconsistent droplet spacing, degrading the quality of the discharged material.
Innovation Solution
A liquid discharge device with a discharge unit, a rotating mechanism, and a control unit that adjusts the discharge frequency based on the relative moving distance, featuring multiple discharge units arranged in an arc shape with overlapping nozzles, allowing for precise control of droplet spacing on conically shaped media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid is discharged to a circumferential portion of a medium having a conic shape or a truncated conic shape by using a liquid discharge device that discharges liquid by relatively rotating a medium and a liquid discharge unit, then liquid can be discharged to curved surfaces, but the distance between adjacent droplets varies because the relative moving distance of the medium per unit time varies, degrading the quality of the discharged liquid material
Solution Approach 1:
The patent applies dynamics by making the discharge frequency variable rather than constant. The control unit dynamically adjusts the discharge frequency based on the rotational position and linear velocity of the medium, ensuring that the discharge frequency adapts to the changing relative moving distance at different diameters of the conic-shaped medium, thereby maintaining consistent droplet spacing.
Solution Approach 2:
The patent changes the parameter of discharge frequency according to the rotational position and linear velocity of the medium. By adjusting the discharge frequency as a variable parameter rather than keeping it constant, the system compensates for the varying relative moving distance at different diameters, maintaining uniform droplet spacing across the conic-shaped medium surface.
2Productivity
If the relative moving distance of the medium per unit time is large in a portion having a large diameter, then liquid can be discharged to the large diameter portion, but the distance between adjacent droplets becomes large, degrading quality
Solution Approach 1:
The patent applies local quality by implementing different discharge frequencies for different portions of the medium. The control unit adjusts the discharge frequency based on the local linear velocity at each rotational position, so that portions with larger diameters and higher linear velocities have higher discharge frequencies, while portions with smaller diameters have lower discharge frequencies, maintaining uniform droplet spacing locally across the entire medium surface.
3Productivity
If the relative moving distance of the medium per unit time is small in a portion having a small diameter, then liquid can be discharged to the small diameter portion, but the distance between adjacent droplets becomes small, degrading quality
Solution Approach 1:
The patent applies local quality by implementing different discharge frequencies for different portions of the medium. The control unit adjusts the discharge frequency based on the local linear velocity at each rotational position, so that portions with smaller diameters and lower linear velocities have lower discharge frequencies, preventing droplets from being too close together and maintaining uniform droplet spacing locally across the entire medium surface.
4Manufacturing precision
If multiple discharge units are arranged in an arc shape with overlapping nozzles, then discharge frequency can be controlled for each discharge unit, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the discharge system into multiple discrete discharge units arranged in an arc shape. Each discharge unit can be independently controlled with its own discharge frequency, allowing precise control of droplet spacing at different angular positions. This segmentation enables the system to handle the complex geometry of conic-shaped media by treating different angular segments independently.
Solution Approach 2:
The patent introduces an angular dimension by arranging discharge units in an arc shape rather than a linear arrangement. This arc-shaped arrangement in the angular dimension allows the discharge units to cover different angular positions around the rotating medium, enabling comprehensive coverage and precise control of droplet spacing across the entire conic-shaped surface.
Data Source
AI summary
In a liquid discharge device that discharges liquid while relatively rotating a medium and a discharge unit that discharges the liquid, a degradation of quality of the discharged liquid material caused by a difference of a relative moving distance between the medium and the discharge unit per unit time when the liquid is discharged is suppressed. The liquid discharge device includes a discharge unit (3) that discharges liquid from nozzles (4) to a medium (M), a rotating mechanism (14) that relatively rotationally moves the medium (M) and the discharge unit (3) around a rotation axis direction Z crossing a discharge direction of the liquid, and a control unit (6) that controls a discharge frequency of the liquid according to a relative moving distance between the medium (M) and the discharge unit (3) per unit time.