Precision Gear Metering Pump Provides Scented Plastic Bag Manufacturer Accurate and Consistent Continuous Pulse-Free Process

Pump buy return on funding could be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A global manufacturer of scented plastic rubbish baggage was on the lookout for an different choice to using pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump solution that gave them accuracy and consistency on the low flow rates required, while also lowering their costs and improving worker well being. Yearly financial savings are so high that the return on investment for the pump system could be measured in days.
Seeking another for pricey pre-scented plastic pellets
A global producer of scented plastic rubbish luggage was on the lookout for a substitute for using pre-scented plastic pellets, which required a devoted silo for each of the 20 obtainable fragrances. The pellets are pneumatically conveyed to every silo from either tanker vans or rail automobiles and the manufacturer was experiencing logistical points associated with preserving the silos crammed. They additionally needed to carry excessive prices for sustaining the inventory of the pre-scented pellets.
In addition, the heavily concentrated scents had been causing well being considerations for the workers who complained of headaches. To mitigate this issue, every extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outdoors. On event, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The firm was seeking a way to make use of plain plastic pellets and apply scented oil directly to the plastic sheet immediately after the extrusion course of to reduce prices, logistical challenges, and power use. They had tried to construct such a system in-house however had struggled to attain accuracy and consistency at the low flow charges they required. They determined to hunt a pump-based answer that could directly spray perfume on the nice and cozy melted sheet plastic as a outcome of the in-house solution could not meet rigorous quality management standards requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding a solution on a tradeshow floor
Design engineers from the plastic bag manufacturer attending the PackExpo present observed a working demonstration of precision gear metering pumps made by Zenith and requested application experts if the pumps may be a fit with their application. After amassing info on the application, an space supervisor for the pump producer with extensive expertise in dosing and mixing methods visited the plant to get a firsthand view of present operations and gather further information.
Working with the pump manufacturer’s design group they developed a system solution utilizing a Zenith B-9000 Series rotary optimistic displacement pump specifically designed for single stream chemical responsibility functions. The pump options an correct, repeatable, pulse free circulate in a compact design ideal for dosing additives such as colors, flavors, and fragrances.
This kind of pump is defined as rotary because the drive shaft is rotated as in comparability with different types of pumps using a reciprocating movement and is also thought-about to be a optimistic displacement kind because the displaced volume is constant and does not differ.
Pumping action is achieved by filling the gear teeth spaces and transporting the fluid around the outer diameter of the gears. When the gear teeth mesh, the fluid is displaced and forced to the outlet facet of the pump. The move price can solely be adjusted by growing or reducing the pace at which the shaft is rotated. The pump selected presents precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid flow.
The pumps provide extraordinarily tight working clearances to minimize fluid slip. Manufacturing tolerances on many components are to +/- 50 millionths of inch with surface finishes as clean as four micro inches or better. The pumps are supplied with an AC “closed loop” motor velocity controller to maintain 0.1 % pump speed accuracy.
The Zenith 9000 series pump is on the market in 11 sizes with capacities starting from .003 to 300 GPH. เกจวัดแรงดัน are available in via hardened 440C series stainless steel, specialty handled 316 stainless steel, and high quality software steels similar to D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag manufacturer chosen a mannequin with a magnetic drive (mag-drive) sealing possibility, which might get rid of shaft leakage of fluids, growing plant security and decreasing risky natural compound emissions. The use of a magnetic coupling additionally eliminates downtime due to mechanical seal failures and eliminates the necessity for buffer fluids.
New answer reduces costs and provides uniform fragrance distribution
The new Zenith pump system gave the scented bag producer a steady, pulse free course of, which guarantees equal and uniform perfume distribution. By including the scent on to the bags after leaving the extruder, the plastic bag manufacturer not only eradicated the want to have separate pellet silos for every scent, but additionally eradicated the necessity to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The producer purchased the primary system and after profitable trials, ordered six additional techniques. Over the past two years they have purchased greater than 30 systems, with plans to order more. The manufacturer can be thinking about having Zenith conduct annual subject calibrations of each system.
After two years of operation, the producer estimates a yearly savings of roughly $480,000 per skid in operation. With 30 skids now running, the return on funding for every system buy can be measured in weeks. To date, there have been no odor complaints because the buyer installed the Zenith techniques

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