Is Multi-Cavity Pressing a Fit for Your Application?

The Answer Could Generate Significant Additional Revenue

Gasbarre Offerings that Improve Productivity


·       Robust mounting and precision-guidance for multi-cavity tool sets

o   Special die set and press design features are available to provide stable and rigid tool mounting


·       A wide range of press configurations, from single to multiple level tooling

o   Allowing for management of individual powder columns


·       A wide range of press motion types: mechanical, hydraulic, electric, and hybrid

o   Allowing for the selection of the design versus needs and efficiencies


·       Die and density control options.

o   Addition of a die hold feature to an existing mechanical press can enable suction filling.

o   Refitting of a press with a servo-controlled fill system ram may give further flexibility and consistency in the die filling process


·       Fluidized and customized die filling systems.

o   A low-cost investment that may lead to multi-cavity production on existing presses.



DuBois, Pennsylvania 15801



The drive to gain productivity without decreasing quality or increasing costs is intense.  A potential answer is to increase the number of tool cavities. Designing more tool cavities is feasible - it has been done and is being used in production every day.  In some cases it is quite simple, but attempting this with older equipment and a lack of understanding will likely lead to failure.  A few points to consider for a successful multi-cavity project:


·       Sufficient press compaction & ejection force capability

o   More cavities imply that more compaction force is required

o   Be mindful of the increase in axial surface area

o   A larger press may or may not be required


·       Appropriate press tool guidance precision

o   Tool grouping and layout are critical to avoid offset loading

§  Offset loading can lead to undesired tool deflection

o   Insufficient tool guidance can lead to inconsistent part height


·       Sufficient press superstructure strength

o   Offset loading can cause system distortion and damage

o   Press distortion can lead to inconsistent part height


·       Sufficient press die filling capabilities

o   Powder fill shoe motion and fill box design should be considered

o   Potential need for improved or special die control


·       Overload protection for tooling

o   Powder supply monitoring

o   Compaction force monitoring

o   Ejection force monitoring & ejected part detection


·       An understanding of the pre-existing application

o   Individual part pressing and ejection force, as well as density and height consistency.

o   Productivity rate.

o   Part geometry and die cavity filling aspects as well as powder flow characteristics

o   Tool mounting, stack-up, and adjustment mechanisms.


o   Any unique process settings.

Call Gasbarre to discuss multi-cavity pressing