How does Meter-Mix work?
The term "meter-mix" refers to the process and hardware needed to accurately manage, blend, and dispense multi-part fluids in an automated manner in the world of bonding, filling, and encapsulating. In electronics and industrial dispensing, meter-mix dispensing uses a two-part adhesive consisting of a base component and a hardener component. When the two components are combined, they initiate a chemical chain reaction that cures the mixture. Prior to achieving its final cure state, the reaction time can be as short as a few minutes or as long as days. In 2-part adhesives, the end user should be aware of the specified "pot life," which is the time until the viscosity (or thickness of the liquid) exceeds its usable range. Even a 5-10% change in viscosity can adversely affect the consistency and repeatability of automated dispensing. Measuring and dispensing equipment must be specified carefully.
Using a Meter-Mix
It may be more cost-effective to choose a 2-part adhesive formulation due to its reduced cure time, increased durability, or better adhesion. The potting process is one of the most common applications for meter mix equipment, and this equipment is very widely used in this process.
This is where an enclosure with a circuit board is filled to a certain level to protect the electronics from moisture, dust, foreign objects, etc. Potting can be used to protect small electronic sensors, motor controller housings, LED video boards, or electric batteries. An operator can position a housing underneath a nozzle and step on a foot pedal to initiate dispense into a single location. This is for a preset amount of time or volume. Potting material in this case is low enough viscosity to flow freely into all required areas.
>The application of very small beads or adhesive deposits to a mobile electronics assembly or thermal gap filler materials to an automotive engine control module may require a multi-axis robot to drive a nozzle along a preprogrammed path. Staking components to a circuit board or dispensing encapsulants over exposed wire bonds may also be precision applications. To implement a successful production process, it is critical to consider automation when applying medium to high viscosity adhesives at the correct flow rate and pattern.
LED Communications Industry Vehicles Defense E-commerce Space Medico-tech
What You Need To Know. Meter-mix dispensing systems consist of four components:
A reservoir can be as small as a syringe for administering millilitre-sized shots or as large as a drum for administering liter-sized volumes. Metering pump technologies vary depending on the flow rate and type of medium to be dispensed. Dispensing valves and mixing devices are typically combined into one unit, but each plays its own role in flow control and fluid blending.
Flow meters
There are many types of pumps for moving fluids accurately, but no single technology meets all capability requirements for all dispensing processes. When designing a meter-mix system, many factors need to be considered, including desired flow rate, cure rate of the mixed composition, filler content and type (if any), viscosity, mix ratio, and process budget. PVA uses three common pump types in this article
The gear
Within a machined cavity, two gears rotate inside a chamber containing fluid. Fluid is forced to the pump outlet by the gear teeth. An servo motor controls the dispense rate through the gear shaft. The machining tolerances between gear teeth and pump walls determine pump accuracy. Pumps dispense volume per revolution and come in various sizes. A silicone adhesive may be used with a gear pump system as an example of a fluid that can be used with the system.
In terms of Metering, what Is The Difference Between 1K and 2K?
The term "metering and mixing" refers to the processing of materials that have more than one component. Grease and oils are some of these substances that may be used, but they may also be adhesives and sealants such as polyurethane, epoxy or silicone. It is a common practice in the automotive industry to use single component materials. In applications like potting or bonding of components, seals, glazing, and many more, two-component materials will be processed in applications including potting or bonding of components. During the dosing process, two component materials are filled in separate tanks and then fully mixed. For instance, epoxy resin could be used with a hardener in this case.
Metering at 1K
In the processing of one component (or one-part) material, 1K metering and mixing machines are used as a means of metering and mixing. There is a wide range of greases, sealants, pastes, and adhesives that can be used for such projects, such as polyurethane, epoxy, and silicone.
Metered and mixed 2K
The 2K metering and mixing process is more complex than 1K metering since the two components are not only metered and applied, but also mixed. Mixing ratios must be closely followed and mixtures must be homogeneous. There are two available technologies for this process: