| Shaft locking device PSL and
self-lubricating undermotion AutoLub NEW MACHINE ELEMENTS FOR IMPROVED HANDLING |
  |
| Shaft locking device PSL and
self-lubricating undermotion AutoLub NEW MACHINE ELEMENTS FOR IMPROVED HANDLING |
|
| True to the concept of the DORNIER
Weaving System with its family of rapier and air jet weaving machines utilizing as many
common subassemblies as possible, the undermotion geometry and quick connection for
harness frames are now identical for both types of weaving machines. Universal selflubricating undermotion, AutoLub
Harness frame quick connection PSL
There is no play in the connection between the push rods and the harness frame connectors. Together with the increased rigidity, this leads to a more exact guidance of the harness frames with very limited vibration, thus reducing stress on the warp ends, which in turn contributes to a reduction in ends down during the weaving process. |
|
As a result of increasingly
higher weaving machine speeds, particularly in the case of the air jet weaving machine, an
improvement of the undermotion bearings became necessary. This led to the development of
the universal selflubricating undermotion, AutoLub (Automatic Lubrication). At the same
time this configuration was engineered to be universally applicable to both air-jet and
rapier weaving machines, independently of whether the application was for machines with
cam or dobby shedding motions. This redesigned subassembly provides more rigidity and
improved precision in the movement of the push rods, resulting in reduced oscillation and
vibration. Each fulcrum point is equipped with needle bearings that are connected with the
central lubrication system. This provides maintenance-free operation and an extended
useful working life. 
With positive dobbies the harness
frames are lowered directly into the weaving machine with the aid of the hydraulic beam
truck. A decisive feature for operating personnel is the Pneumatic Shaft Locking device
PSL, for which a patent application has been made. This centers the harness frames during
transfer into the weaving machine and automatically connects them to the push rods in the
undermotion, independently of the shed position. Unlocking the harness frames during
removal from the weaving machine and locking them into position during transfer into the
machine are very userfriendly operations at the machine display panel, utilizing the
corresponding menu. As a result up to 50 minutes in start-up time can be saved in
comparison with the system used until now, depending on the number of harness frames (max.
24).