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

Pump purchase return on investment could be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A international producer of scented plastic garbage luggage was looking for a substitute for 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 at the low move charges required, while additionally lowering their prices and enhancing worker health. Yearly financial savings are so high that the return on funding for the pump system could be measured in days.
Seeking another for pricey pre-scented plastic pellets
A international producer of scented plastic garbage luggage was in search of an different selection to the use of pre-scented plastic pellets, which required a dedicated silo for each of the 20 obtainable fragrances. The pellets are pneumatically conveyed to each silo from either tanker vehicles or rail automobiles and the manufacturer was experiencing logistical issues associated with keeping the silos stuffed. They additionally needed to carry excessive costs for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been causing well being considerations for the employees who complained of complications. 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 in search of a method to use 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 build such a system in-house however had struggled to realize accuracy and consistency at the low circulate charges they required. They determined to hunt a pump-based solution that might directly spray fragrance on the nice and cozy melted sheet plastic as a outcome of the in-house resolution couldn’t meet rigorous high quality management 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 show observed a working demonstration of precision gear metering pumps made by Zenith and asked software consultants if the pumps might be a fit with their utility. After collecting info on the applying, an space supervisor for the pump manufacturer with intensive experience in dosing and blending systems visited the plant to get a firsthand view of current operations and gather further data.
Working with the pump manufacturer’s design group they developed a system answer utilizing a Zenith B-9000 Series rotary constructive displacement pump specifically designed for single stream chemical obligation purposes. The pump options an correct, repeatable, pulse free move in a compact design ideal for dosing additives corresponding to colours, flavors, and fragrances.
This kind of pump is defined as rotary as a result of the drive shaft is rotated as in comparison with other kinds of pumps utilizing a reciprocating movement and can additionally be considered to be a constructive displacement type as a result of the displaced volume is fixed and does not range.
Pumping action is achieved by filling the gear tooth spaces and transporting the fluid across the outer diameter of the gears. When the gear enamel mesh, the fluid is displaced and forced to the outlet facet of the pump. The move rate can only be adjusted by rising or decreasing the speed 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 circulate.
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 better. The pumps are supplied with an AC “closed loop” motor speed controller to take care of 0.1 % pump pace accuracy.
เพรสเชอร์เกจ is on the market in 11 sizes with capacities starting from .003 to 300 GPH. Wetted parts are available in by way of hardened 440C sequence stainless-steel, specialty treated 316 stainless steel, and prime quality tool steels such as 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 can remove shaft leakage of fluids, increasing plant safety and reducing unstable natural compound emissions. The use of a magnetic coupling also eliminates downtime because of mechanical seal failures and eliminates the need for buffer fluids.
New answer reduces costs and offers uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free course of, which guarantees equal and uniform fragrance distribution. By adding the scent directly to the bags after leaving the extruder, the plastic bag producer not solely eliminated the want to have separate pellet silos for every scent, but additionally eradicated the want to vent the fumes that come from the pellets as they journey from the silos to the extruders.
The producer bought the first system and after profitable trials, ordered six extra techniques. Over compound gauge ราคา have purchased greater than 30 systems, with plans to order more. The producer can be excited about having Zenith conduct annual area calibrations of every system.
After two years of operation, the producer estimates a yearly financial savings of roughly $480,000 per skid in operation. With 30 skids now working, the return on investment for each system purchase may be measured in weeks. To date, there have been no odor complaints because the buyer installed the Zenith methods

Leave a Comment