german kitchen door hinges

[sparkydave in wales]

I am carrying out modifications to a Poggenpohl kitchen, the cabinet hinges appear to have some hidden screw system to fasten them onto the cabinet, once you take the door off, there are what looks like two threaded pins but no means of turning them, I need to take them off, any ideas??

 

[chirpychippy]

Post a picture we may be able to decipher them for you, the hinge not the door

 

[sparkydave in wales]

sorted it thanks, the hinge base has two integral aluminium expansion plugs which go into the board of the unit, two threaded pins then go in to open up the plug, then the heads are cut off flush, good idea until you want to remove them!! introduced them to a cutting wheel on a dremel which has got rid of them