Zenith® Pumps Precision Dispensing in Hot Melt Adhesive Applications
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Adhesives provide a
low-cost, effective method for joining various substrates. Applied by either a dispenser,
spray nozzle, or hand held gun, an adhesive joint offers better stress distribution,
superior fatigue resistance, and greater strength over traditional bonding methods.
Industry Challenge
The most common concern facing adhesive users is uneven spraying or dispensing.
Reciprocating pumps, such as diaphragm or piston pumps, produce a flow that varies in both
pressure and volume. To compensate, additional adhesive must be applied to sufficiently
coat the target areas. Over-spraying and over-dispensing cause excessive material waste
and increased manufacturing costs.
Other concerns when applying hot melt adhesives are high
viscosity, high operating temperature, and pump accuracy. The viscosity of hot melt
adhesives is generally about 500 poise with operating temperatures ranging from 300 to
400°F. Pump accuracy is critical when dispensing precise amounts of adhesive to a
specified area.
The Zenith Solution
The pump of choice for dispensing hot melt adhesives is typically a positive displacement
gear pump. This high precision pump must offer the capability of pumping high viscosity
fluids and be able to operate at high temperatures. Zenith precision metering pumps
provide pulseless
metered flow to an applicator while generating the necessary pressure to meet system
requirements.
How You Benefit
 Precise, Consistent Flow - A typical hot melt adhesive
machine includes a melter with the capacity for mounting one to four pumps. By installing
a Zenith precision metering pump to each mount, the hot melt adhesive can be accurately
metered to the applicators. The result is a precise, smooth, and consistent flow which
virtually eliminates costly over-spraying, over-dispensing, and wasted material.
Increased Throughput - Increase throughput while
minimizing operating, manufacturing, and maintenance costs. Zenith planetary metering pump can be mounted directly to the
applicator and fed by a low cost transfer pump. Up to 32 metered streams are available
from a single pump, greatly increasing throughput.
Improved Quality - Manufacturers and users of adhesive dispensing machinery can vastly improve quality and
reduce waste with the use of Zenith metering pumps. Throughput can be maximized while
minimizing the size, complexity, and maintenance of existing or new adhesive machinery.
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