The amount of glue dispensed by a glue dispenser is typically measured by calculating the volume of glue deposited each time. This can be done by measuring the volume of the glue bead or drop applied on the product. For example, by measuring the size of the glue deposit on the product, one can calculate the volume dispensed per shot or per application cycle.
Common methods and technologies to measure or control the amount of glue dispensed include:
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Volumetric measurement using mechanical or motor-driven volumetric meters that extrude a predefined amount of adhesive, independent of pressure or air. These systems provide highly accurate dosing, especially useful for intermittent dispensing.
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Piston meters which use a fixed-volume chamber emptied by a piston to provide precise volumetric dispensing of adhesive. The volume dispensed is defined by the size of the piston chamber and controlled stroke length.
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Flow meters measure and monitor the flow rate of adhesive continuously. Flow meters combined with controllers regulate volume flow regardless of changes in viscosity or temperature to ensure accuracy.
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Positive displacement pumps employed in metering systems to draw adhesive into a reservoir, then push it precisely out through a valve. The dispensing is controlled by adjusting stroke length or pump speed, giving accurate flow control for various adhesive viscosities.
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Advanced precision flow meters are used for high viscosity adhesives, providing very fine resolution (e.g., 0.01 gram per shot) for highly repeatable dosing, maintaining product consistency and quality.
In practice, the measurement technique chosen depends on the adhesive type, viscosity, application volume, and required precision. For glue volume verification, measuring the bead profile size, or using electronic/mechanical metering devices to quantify volume or weight dispensed, are key approaches.
Therefore, to measure the amount of glue dispensed, you primarily quantify the volume dispensed per shot or cycle, using volumetric meters, flow meters, or pump-controlled dispensing systems tailored to your glue and application requirements.
If you need to measure the actual applied glue on a product, techniques like image-based profile measurement or probes to gauge glue height and width can also be used for more detailed assessment.
Let me know if you want details on measuring glue in specific applications or using specific equipment types.