MMD - Meter Mix Dispense
MMD stands for Meter, Mix, and Dispense. MMD equipment is specialized machinery used to precisely mix and dispense multi-component materials. MMDs are a perfect fit for Carbon's two-component bulk resins.
MMDs ensures high-quality, repeatable results while reducing material waste and production downtime, making it an essential tool for applications requiring precision and reliability.
Key features of MMD equipment:
- Metering Accuracy: Precisely meters each component to control flow rate and minimize waste.
- Mixing Precision: Ensures components are mixed at the correct ratio
- Dispensing Systems: Delivers mixed material with precision.
- Material Compatibility: Designed to handle a range of material viscosities, from thin liquids to highly viscous pastes.
- Automation Capabilities: Often integrated with production lines for automated dispensing, improving efficiency and repeatability.
Validated MMDs
Meter Mix PAR 3CM
Carbon has validated the Meter Mix PAR 3CM for applicable resins when noted on the material protocol sheet.
Reference Meter Mix PAR 3CM for more information.
Other MMDs by Meter Mix may also be used when noted on a material protocol sheet.
Updated versions of noted models are also viable.
Loctite EQ MM38 MMD
The Loctite EQ MM38 MMD is a legacy recommendation for certain resins, when noted the material protocol sheet.
Reference Loctite EQ MM38 for more information if you still use this MMD.
Clearing Resin from MMD Lines
Following this purging procedure is best practice when using a Carbon resin when
- Preparing for a shutdown
- Changing Resins
- Clearing a clogged line
Confirm this process and solvent compatibility with your MMD's manufacturer before proceeding.
Solvents
99% IPA (Isopropanol)
99% PEG-400 (Polyethylene Glycol)
Procedure
The goal is to purge the MMD tank and lines until no more resin comes out of the lines. This procedure may be used for either Part A or Part B.
- Add IPA into the tank (example: 2 L at a time)
- Purge the MMD, and add more IPA as needed, until the IPA coming out is clear
- Add PEG-400 into the tank (example: 2 L at a time)
- PEG-400 is an inert, higher viscosity liquid, which is helpful for "pushing" trapped resin out of the lines.
- Purge the MMD, and add more PEG-400 as needed, until the PEG-400 coming out is clear
- Repeat the purging with IPA again to remove residual PEG-400
- Add resin into the tank
- Purge the MMD, and add more resin as needed, until the resin coming out is smooth, with no residual IPA or PEG 400
- Proceed to standard production