Product Catalog

Goal:

Allow gases to escape during the combined process of billet upset and burp decompression reducing blisters.

Maintain a minimal uniform skin of aluminium on the liner ID reducing profile inclusions

Function:

The function of the dummy block is the extension of the ram or stem, which pushes the softened alloy through the die. There are a number of functions that must be satisfied by an effective dummy block:

To repeatedly transmit the force of the ram, at high temperature, to the alloy.

To expand quickly under load and maintain a secure seal with the container wall, leaving only a thin film of alloy on the liner.

To seperate cleanly from the billet at the end of the stroke.

To contract immediately, and return through the container without stripping the film of alloy from the liner.

To cause no gas entrapment that can result in blistering, or damage the face of the container and/or dummy block.

To compensate for minor press misalignment.

To be quickly and easily removed and replaced.

To function effectively until a production run is complete.

Benefits of the Attard Dummy Block:

Reduce scrap, due to back end blisters and surface defects

Reduce cost of operation

Increase productivity

Reduce downtime

Increase operating life