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

weksler pressure gauge ราคา on investment can be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A international manufacturer of scented plastic garbage bags was on the lookout for an alternative alternative to the use of 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 circulate charges required, while additionally lowering their costs and bettering employee well being. Yearly financial savings are so high that the return on investment for the pump system may be measured in days.
Seeking an alternative for pricey pre-scented plastic pellets
A world manufacturer of scented plastic garbage luggage was in search of an various to the utilization of pre-scented plastic pellets, which required a dedicated silo for each of the 20 out there fragrances. The pellets are pneumatically conveyed to each silo from either tanker vans or rail automobiles and the producer was experiencing logistical points related to preserving the silos stuffed. They also had to carry high costs for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been inflicting well being concerns for the workers who complained of headaches. To mitigate this problem, 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 company was looking for a method to make use of plain plastic pellets and apply scented oil on to the plastic sheet immediately after the extrusion process to minimize back costs, logistical challenges, and power use. They had tried to construct such a system in-house however had struggled to realize accuracy and consistency on the low circulate charges they required. They decided to hunt a pump-based solution that might immediately spray perfume on the warm melted sheet plastic as a result of the in-house answer could not meet rigorous high quality control standards requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding an answer on a tradeshow flooring
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 software consultants if the pumps could be a fit with their utility. After accumulating data on the applying, an space manager for the pump producer with in depth expertise in dosing and mixing methods visited the plant to get a firsthand view of present operations and gather additional information.
Working with the pump manufacturer’s design group they developed a system solution using a Zenith B-9000 Series rotary optimistic displacement pump particularly designed for single stream chemical duty functions. The pump options an correct, repeatable, pulse free flow in a compact design best for dosing components such as colors, flavors, and fragrances.
This sort of pump is outlined as rotary because the drive shaft is rotated as in comparability with different kinds of pumps utilizing a reciprocating movement and can additionally be thought-about to be a constructive displacement sort because the displaced quantity is constant and doesn’t differ.
Pumping motion is achieved by filling the gear teeth spaces and transporting the fluid across the outer diameter of the gears. When the gear teeth mesh, the fluid is displaced and compelled to the outlet facet of the pump. The circulate fee can solely be adjusted by growing or lowering the speed at which the shaft is rotated. The pump selected provides precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid flow.
The pumps provide extremely tight operating clearances to minimize fluid slip. Manufacturing tolerances on many elements are to +/- 50 millionths of inch with floor finishes as smooth as 4 micro inches or higher. The pumps are offered with an AC “closed loop” motor pace controller to maintain zero.1 percent pump speed accuracy.
The Zenith 9000 collection pump is on the market in 11 sizes with capacities ranging from .003 to 300 GPH. Wetted elements are available in via hardened 440C series chrome steel, specialty treated 316 stainless steel, and top quality tool steels corresponding to D2, M2, M4 and CPM-M4 to supply good corrosion and abrasion resistance.
The bag manufacturer chosen a mannequin with a magnetic drive (mag-drive) sealing choice, which might eliminate shaft leakage of fluids, rising plant safety and reducing risky natural compound emissions. The use of a magnetic coupling also eliminates downtime as a end result of mechanical seal failures and eliminates the necessity for buffer fluids.
New answer reduces prices and presents uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which guarantees equal and uniform fragrance distribution. By including the scent directly to the luggage after leaving the extruder, the plastic bag producer not only eradicated the necessity to have separate pellet silos for every scent, but also eradicated the need to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The manufacturer purchased the primary system and after successful trials, ordered six further techniques. Over the previous two years they have bought greater than 30 techniques, with plans to order extra. The manufacturer can also be interested in 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 working, the return on funding for each system buy can be measured in weeks. To date, there have been no odor complaints because the customer installed the Zenith techniques

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