Adjustable Valve Stroke for Jetting Device Wear Compensation
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Solution Overview
Problem
Conventional jetting devices experience wear over time, leading to changes in the shape of valve elements and seats, which disrupt the consistency of dispensed fluid material, and are difficult to maintain due to non-disassembleable components.
Innovation Solution
A jetting device with an adjustable valve system, where the stroke length between the valve element and seat can be adjusted using a drive pin and valve stop, allowing for rotation to maintain fluid material consistency and facilitate maintenance by enabling easy disassembly of the fluid module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve element and valve seat are used continuously in conventional jetting devices, then the jetting operation can be maintained, but wear occurs over time changing the shape of these components which disrupts the consistency of dispensed fluid material
Solution Approach 1:
The patent implements adjustable stroke length capability that allows the valve element's movement distance to be dynamically modified. This enables compensation for wear by adjusting the stroke length to maintain consistent droplet characteristics even as the valve components degrade over time, directly resolving the contradiction between maintaining reliability and extending component service life.
2Productivity
If the jetting device operates for extended periods, then productivity is maintained, but the valve components wear and require maintenance which is difficult due to non-disassembleable components
Solution Approach 1:
The patent divides the jetting device into separable modules, specifically making the fluid module disassembleable from the drive module. This segmentation allows the fluid module containing the valve components to be easily removed for maintenance while the drive module remains in place, enabling quick repairs and component replacement without dismantling the entire device, thus resolving the contradiction between continuous operation capability and ease of repair.
3Manufacturing precision
If the stroke length is fixed in conventional jetting devices, then the device structure is simple, but wear changes the effective stroke length and disrupts dispensing consistency
Solution Approach 1:
The patent introduces an adjustable stroke length mechanism that transforms the fixed stroke length design into a dynamic, modifiable parameter. The adjustment capability is integrated into the existing valve structure through the movable fluid module design, allowing stroke length modification without substantially increasing overall device complexity, thereby resolving the contradiction between manufacturing precision and device complexity.
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 adjustable valve system ensures consistent dispensing of fluid material by accommodating wear and simplifies maintenance through modular design, maintaining product quality and ease of upkeep.
Implementation Method 1
fluid material under pressure
Implementation Method 2
Contact between the valve element and the valve seat seals off a discharge passage
Implementation Method 3
generates pressure that accelerates the finite amount of fluid material through the discharge passage
Implementation Method 4
drive pin configured to move the valve element toward the valve seat
Implementation Method 5
causes a droplet of the material to be ejected, or jetted, from an outlet of the discharge passage
Implementation Method 6
the material then flowing under the chip by capillary action
Data Source
AI summary
Jetting devices and methods for dispensing a fluid material from a fluid supply. A jetting device includes a fluid module configured to be coupled with the fluid supply and to dispense the fluid material. The fluid module includes a valve seat and a valve element configured to move relative to the valve seat over a stroke length, and a valve stop configured to position the valve element relative to the valve seat for determining the stroke length. The jetting device further includes a drive module configured to actuate the fluid module and includes a drive pin configured to move the valve element toward the valve seat. The drive pin is configured to be rotated to cause rotation of the valve stop for adjustment of the stroke length. The drive pin may be rotated by a rotation device comprising a motor.