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°F to 400°F. Pump accuracy is critical when dispensing precise amounts of adhesive to a specified area.
Benefits of the pumps include the following.
Precise, consistent flow - A typical hot-melt adhesive machine includes a melter with the capacity for mounting one to four pumps. By installing a 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 overspraying, overdispensing, and wasted material.
Increased throughput - To increase throughput while minimizing operating, manufacturing and maintenance costs, a 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 improve quality and reduce waste with the use of Zenith precision metering pumps. Throughput can be maximized while minimizing the size, complexity and maintenance of existing or new adhesive machinery.
For more information on pumps, contact Zenith Pumps at (800) 277-8968 or (919) 775-4600; or visit http://www.zenithpumps.com.