Table of Contents
Assignment background
The rollers in multifunction printers are important components that determine the stability of paper transport, and their surface friction characteristics must always be consistent. If the friction of the rollers is too strong, paper jams will occur, and if it is too weak, transport problems such as misfeeding and freewheeling will occur, so maintaining an appropriate level of slippage is the key to improving reliability.
For this reason, it is common practice to periodically apply a silicone lubricant to the roller surface on site, but this poses the following challenges:
- Equipment soiling due to scattering
When spraying low-viscosity lubricants, the mist of the liquid can fly over a wide area and adhere to internal sensors and electronic components, causing malfunctions and frequent cleaning due to contamination. - Uneven coating and friction
Conventional application methods (wiping or simple spraying) tend to result in uneven application or excess or insufficient application, causing variations in the coefficient of friction across the entire roller. As a result, paper feed stability decreases, leading to equipment troubles and increased maintenance frequency.
Benefits
The newly introduced SV91 spray valve significantly improved these issues, providing the following benefits:
- Reduced scattering and cleaning time
The SV91 is designed to prevent clogging of the nozzle with air after spraying, and to reduce overspray and splashback. This means that there is almost no splashing onto surrounding parts, and dirt on the sensor and internal structure is greatly reduced. This contributes greatly to reduced maintenance frequency and downtime. - Uniform application for optimal friction control
The SV91 uses a minute amount of compressed air to spray a low-viscosity lubricant in a uniform, precise mist. Optimizing the nozzle air and flow rate eliminates uneven application and maintains a stable coefficient of friction across the entire roller. This improves paper feed stability and significantly reduces paper jams and image misalignment.
Introduced products
Spray valve SV91
The SV91 is a valve compatible with low viscosity liquids that uses minute amounts of compressed air to enable high-precision spraying. It combines atomization control with anti-splash functionality, enabling safe and uniform application in narrow spaces and near moving parts.
- Uniform application through high-precision spray control: Individual adjustment of the fluid flow rate and nozzle air ensures extremely uniform dispersion of lubricant, eliminating uneven application.
- Anti-splash design: Minimizes overspray and splashback, reducing adhesion to parts and the need for frequent cleaning.
- Non-contact component protection: Uniform application is possible even on rollers with complex shapes, contributing to maintaining a stable coefficient of friction.
