Apparatus for friction welding a pair of plastic members in a predetermined angular relation

Abstract

Abstract THE SPIN WELDING MACHINE INCLUDES A SUPPORTING TABLE DISPOSED BELOW AN AXIALLY MOVABLE AND ROTATABLE CLUTCH MECHANISM THAT INCLUDED AN ANNULAR PLATE MEMBER FOR PIVOTALLY SUPPORTING AN ELBOW ENGAGING PAWL AND A TRIP LEVER THEREFOR. A SPRING PRESSED CENTERING MEMBER ROTATABLY CARRIED ON THE PLATE SUPPORT PROJECTS AXIALLY DOWNWARDLY FROM THE PLATE SUPPORT. A PLASTIC HOUSING MEMBER HAVING AN ANNULAR PORTION FOR CONNECTION WITH ONE END OF A PLASTIC ELBOW FITTING IS HELD AGAINST ROTATION IN A TABLE MOUNTED FIXTURE WITH THE ANNULAR PORTION FACED UPWARDLY IN COAXIAL ALIGNMENT WITH THE PLAT SUPPORT. WITH ONE END OF THE FITTING RECEIVED IN THE ANNULAR PORTION THE OTHER FITTING END IS EXTENDED RADIALLY OF THE ANNULAR PORTION. ON DOWNWARD MOVEMENT OF THE SUPPORT PLATE TO A LIMITED POSITION THE CENTERING MEMBER ENGAGES THE FITTING TO MAINTAIN A PRESSURE CONTACT OF THE FITTING WITH THE HOUSING ANNULAR PORTION. ON LOWERING OF THE PLATE MEMBER TO AN ADJUSTED POSITION FOR ROTATION THE PAWL RELEASABLY NGAES THE RADIALLY EXTENDED END OF THE FITTING AND ROTATES THE FITTING RELATIVE TO THE HOUSING ANNULAR PORTION. THIS ROTATION IS CONTINUED FOR A PREDETERMINED TIME PERIOD THAT IS TERMINATED WITH THE ENGAGEMENT OF THE PAWL TRIP LEVEL BY A SOLENOID OPERATED ACTUATING MEMBER CARRIED ON THE TABLE. THE ACTUATING MEMBER IS ORIENTED RELATIVE TO THE HOUSING MEMBER SO THAT PAWL DISENGAGEMENT FROM THE ELBOW FITTING TAKES PLACE WHEN THE RADIALLY EXTENDED END PORTION OF THE ELBOW IS IN A PREDETERMINED ROTATED POSITION RELATIVE TO THE ANNULAR PORTION OF THE HOUSING MEMBER. THE PLATE MEMBER IS THEN RAISED, THE SPIN WELDED ASSEMBLY OF THE ELBOW AND HOUSING MEMBER REMOVED FROM THE FIXTURE, AND THE PAWL IS AUTOMATICALLY RESET FOR THE NEXT SPIN WELDING OPERATION.

Inventors

• 👤 Willis L Kibler

Bibliographic Details