The METRO M machine loaders and METRO H hopper loaders convey plastic granulate quickly and cleanly to the feed throat or hopper of a processing machine, a drying bin or a day bin. Material is delivered exactly when needed keeping machines running and avoiding costly downtime. Material wastage is eliminated and the work-space is kept clean and safe.
All material loaders are fully modular and can be matched to different throughputs and requirements depending on the application. Not only are there different material loader volumes but also different material inlet and outlet sizes which can be accurately adapted to suit throughputs and conveying distances.
The mesh filter is automatically cleaned after each loading cycle by implosion. This guarantees a constant and reliable material conveying and reduces maintenance costs on the loader. Because the material loader is air-tight the conveying performance remains stable and there is no dust around the unit.
The vacuum module can be rotated 360 °. This allows for a professional neat installation without unnecessary bends or hose.
The material loader lid is free from any attachments such as vacuum valves, hoses, etc., this allows you to safely and easily gain access to the unit. This results in a significant time savings in the cleaning down the loader.
The material loader inlet flaps make sure that multiple loaders can work together properly in a system. They limit the amount of vacuum required for a group of loaders connected to a coupling station. Thus, no check valves need to be installed in the material flow at the coupling station which would result in a reduction in conveying capacity and increased material abrasion.
An additional benefit of the inlet flap is that it acts as a deflector plate at the material inlet and so protects the loader mesh filter and body from wear. A special glass plated version is available for extremely abrasive materials.
A spring loaded damper on the discharge flap prevents the flap completely closing when not under vacuum. During pneumatic conveying any granules left lying on the discharge flap which might get trapped are first sucked away. With increasing vacuum, the flap is then pressed against the spring and will close completely.
Because the large material outlet has a discharge flap which is made of stainless steel it is abrasion resistant and meets all requirements for medical or food packaging applications. The angled design increases the outlet area and helps with materials which may bridge.
The counterweight of the discharge flap is mounted on the outside of the loader discharge module; this means that the actual status of the loading cycle is visible at all times. Service work can be easily and quickly carried out, as accessibility is excellent.
When conveying hygroscopic materials with small throughputs or where space is limited a machine loader version is available. The discharge module of the loader has no discharge flap and the unit must be mounted directly on the feed throat of the processing machine.
The benefit to you is that no machine supply hopper is required and very little material stays at the machine. This is especially important for dried materials as the residence time of the material is kept to an absolute minimum.
All material loaders are of modular design and are constructed from electro-polished stainless steel. Guaranteeing you contamination-free operation and easy clean down due to the high quality surface finish.
The glass body option allows you to visually check the status of the loader at a glance and see which material is being conveyed. This is very useful when changing materials with different bulk densities. Overfilling of the loader (which can lead to the mesh filter becoming blocked) can easily be detected and the conveyed quantity adjusted.
Depending on the characteristics of the materials being conveyed (very dusty, flakes or glass fibres) there are modules available especially designed for the specific challenges of the conveying these materials. For example regrind loaders with special filter cleaning, flakes loaders with a very large material discharge flaps or loaders which have been reinforced with baffles and hardened surfaces for conveying glass filled materials.
As an option, material loaders can be supplied in a completely filterless version. With the IntelliFlow conveying function, the conveying speed can be precisely matched to the conveyed materials and their characteristics. In this way there is no filter cleaning at the machine as dust is removed from the material flow and is sucked back to the central filter.
Several different levels of automation are available for controlling the METRO loaders.
SELVAC 2: market-proven microprocessor-based control.
METROnet S: a soft PLC conveying control for standard conveying systems.
METROnet AE and AN: the ultimate networkable system toolkit for complex conveying systems with either a soft PLC or Siemens S7 PLC with WEBpanel and decentralised CAN-Bus nodes for the connection of peripheral equipment. All METROnet controls are totally integrated in the CONTROLnet platform and can be linked to other controls via Ethernet.