A french manufacturer forsoundabsorbing for car engine has asked us to find a self inflate system. The aim was to maintain a mold’s bead ring during foam injection. With this new system, the manufacturer wanted to optimize manufacturing and decrease the final step avoindind piece deburring.

Needs and constraints

We got some technical constraints to integrate this new pressing system:

  • little width under modls : 650 x 500
  • little hight under molds : 23 mm
  • limited time for squeezing
  • a 14 ton push force
  • the force needs to be equalized / balanced
  • openned stroke : 90 mm
  • the limited temperature range is : 70 °C
vérin gonflable Pronal

Pronal Solution

After visiting us, Pronal has given its technical offer composed of 2 custom made lifting bag. They have been fitted to the industrial environment:

  • bead ring position was optimized for inflating air
  • dimensions : 650 x 500 mm
  • thickness : 18 mm
  • safety coefficient was uot tp : +4
  • working pressure : 58 PSI – 4 Bar.

The tray on which is hte lifting bag has been bored in order to fix and inflate the lifting bag thanks to pipework.

Machine avec vérins gonflables
Vérin gonflable pour pressage


Those lifting bags can be easily removed and are totally fitted to the machine. As pressure is balanced on the mold’s side, we were able to reach manufactuer’s aim. Up to today we have supplied a dozen of lifting bags.

You need more information about this project? This requirement meets your expectations? Contact our experts who succefully manage this kind of project to get more information and be advised as per your need.

contact@pronal.com – +33 (0)3 20 99 75 00

lifting bags supplied
14 T
of thrust
of resistance

Would you like more information on this project?

Vous pouvez contacter nos experts qui sont adeptes de ce genre de projet pour avoir plus d’informations et être conseillé

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