Forming and compaction device, especially for molded concrete elements, has upper and lower vibrators made to vibrate at same frequency during compaction

摘要

A control system is used to ensure that the upper and lower vibrators (2, 10) vibrate at the same frequency during compaction. The lower vibrator can be connected to a mold (3) and can vibrate in at least one direction. A punch (8) positioned above the mold can be connected to the upper vibrator, also capable of vibrating in at least one direction.