Plastic testing laboratories are looking for all kinds of quality and accuracy in dispensing technology. This is especially important for research related to the pharmaceutical and medical industries. Extruders manufactured by Zamak Mercator are adapted to work with Movacolor dispensers. The adaptation includes mechanical assembly and a program that facilitates the synchronization of the dosing system with the extruder. The description below contains basic information about the types of dispensers that can be used with our extruders. At the customer's request, we can use third-party dosing systems.
Gravimetric feeder vs. volumetric feeder
You might think that a gravimetric feeder and a volumetric feeder are very similar, and it makes sense that both systems were developed to dispense additives in-line with the desired output into the main feed stream of the extruderBoth dosing systems are equipped with a hopper, controller, stepper motor and dosing cylinder or screw feeder In terms of speed, Movacolor stepper motors range from 0.1 to 200 rpm, making it possible to set the rotation speed very precisely. quality.
Features and advantages of the gravimetric feeder
A gravimetric feeder, also known as a loss feeder, is a dosing system that doses based on weight and speed. A volumetric feeder does this based on volume and speed. using weight loss technology that measures the decreasing weight of the material as it is dispensed.
Features and benefits of a volumetric feeder
A volumetric feeder is a dosing system that supplies the production system with a specific amount of material within a set time frame, based on the so-called volumetric principle. Unlike a gravimetric feeder, the dispensing speed of a volumetric feeder should be manually selected, which may vary depending on the type of input material, for example, masterbatch requires a different speed compared to dispensing liquid or powder input material For smaller production processes and companies looking to save on dispensing equipment, a volumetric feeder is preferred over a gravimetric feeder.This means that a gravimetric feeding system typically provides a higher return on investment (ROI) over the long term.
Gravimetric Feeder Benefits
Volumetric Feeder Benefits
When should you choose a gravimetric feeder and when is it best to use a volumetric feeder?
Optometric dispensing technology has been specifically developed by Movacolor for the production of ultra-small precision end products on micro injection molding machines and micro extruders Due to the tight tolerances of high precision end products and the limited mixing capabilities of these small injection molding machines and extruders, in most cases these high precision applications are mixed material These specially manufactured pre-mixes are expensive due to the small production batch. As a result, Movacolor engineers have developed optometric dispensing technology. This high-precision, patented dispensing system enables significant cost savings by using standard virgin material and masterbatch or dosing additives in micro injection molding machines and micro extruders.
Optometric dosing technology versus gravimetric dosing technology
Compared to optometric dosing technology, gravimetric dosing has its limitations Ultra-low dose weight requires extremely low doses with 100% repeatability and high dose-to-dose accuracy When you dispense extremely low mass pellets with a gravimetric feeder, there is a problem with the response time of the control systems and the mechanics of the dispenser.
Optometric dosing technology how it works
The air creates a vacuum behind the disc with small holes. The disc rotates and collects the masterbatch granules.Optical sensor detects masterbatch pellets when sensor signal is blocked With this technique, the software is able to count the amount of masterbatch pellets dispensed pellet by pellet.
Fluid dispensing system
Liquid dyeing can be a difficult operation It's all about reliable dispensing, often at extremely low doses Fluctuating fluid viscosity and spill-free handling are the main issues Movacolor has developed a modular liquid dispensing system with one universal motor, two types This gives you the opportunity to compose the optimal configuration.
A peristaltic pump combined with a gravimetric scale is the perfect combination for color change Gravimetric control automatically compensates for inaccuracies in the peristaltic pump The performance of a peristaltic pump is highly dependent on the viscosity of the liquid, the type of pump hose used and the age and wear of the pump hose.
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