Hennecke GmbH - machines and plants for polyurethane processing

Hennecke GmbH - machines and plants for polyurethane processing

Foam-filling refrigerator cabinets with enhanced productivity
Conventional foaming technology involves a random distribution of the reaction mix, even with rather complex cabinet geometries. This method requires overfilling of the cavities to ensure that the specified minimum density will be achieved at all points.

Diagram Patented Flowter for shorter demould times
Much shorter flow paths for the reaction mix provide an almost uniform density distribution throughout the refrigerator cabinet without overfilling. Our patented Flowter accelerates the filling process.

Diagram
TopFlow technology
Conventional filling method

Diagram
Clearly improved density distribution
Tests with refrigerator cabinets have confirmed that TopFlow technology offers significant advantages over the conventional foam-filling technique. These benefits are particularly pronounced on geometrically complex cabinets (e.g. for multi-compartment refrigerators). The two charts exemplify the results for a specified minimum foam density of 30 kg/m³.

Density distribution diagram for a:
tabletop model
2-door model

TopFlow technology - PUre advantages
The TopFlow technology, a joint development of Bayer and Hennecke, provides refrigerator manufacturers with a number of benefits translating into reduced production costs:

Faster mixture injection

Shorter flow paths

Enhanced density distribution

Finer cell structure throughout the cabinet

Potentially shorter gel times (friability time)

Reduction of "overfill" without falling below the specified minimum foam density

Low-maintenance mixhead without cleaning piston

Spare part inventory reduction

Click here for more information about our PPT pentane technology.

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