How to Precisely Control Dispensing Volume?
To accurately control the dispensing volume of each application when using a trademark dispensing machine for silicone trademarks, follow these steps to set up the parameters:
I. Measure the Required Dispensing Volume
Start by measuring the volume of the area where the silicone will be dispensed. This measurement represents the required amount of adhesive for each application.
Ensure the measurement is as accurate as possible, as it forms the foundation for setting the dispensing machine's parameters.
II. Set Dispensing Machine Parameters
Dispensing Time:
The dispensing volume is primarily controlled by the dispensing time set on the machine.
Longer dispensing times result in larger amounts of adhesive. Adjust the dispensing time based on the measured required volume.
Pressure Adjustment:
For liquid adhesives, pneumatic dispensing machines are recommended as they offer a suction-back function to prevent dripping, ensuring precise volume control.
The pressure level impacts the adhesive flow rate and quantity. Set an appropriate pressure value based on the adhesive properties, working environment temperature, and other factors.
Needle Selection:
The inner diameter of the dispensing needle affects the adhesive volume.
Larger diameters produce higher dispensing volumes, while smaller diameters dispense less.
Choose a needle size based on the product dimensions and required adhesive dot diameter. Generally, the needle's inner diameter should be approximately half the diameter of the adhesive dot.
III. Use High-Precision Components
For applications requiring high accuracy, consider using advanced components like metering pumps and mixing valves.
These components ensure precise adhesive measurement and mixing for consistent dispensing performance.
IV. Perform Test Runs and Adjustments
After setting the parameters, conduct test runs to observe the dispensing results.
If the volume is too large or too small, fine-tune the parameters accordingly until the desired results are achieved.
V. Regular Maintenance and Calibration
To maintain stable machine performance and accurate dispensing over time, perform regular maintenance and calibration, including:
Cleaning the needle to prevent clogging.
Checking for stable air pressure.
Calibrating the metering pump for precise operation.