Just how do they make a sink?.

I once sold industrial lubricants and went to a company that made sinks. They press them (deep drawing) with a good lubricant on the die.

Things like gas cylinders are also drawn.

Some do split - hence the importance of a lubricant.

Try this:

I asked Franke about this once and they said that they are generally made by deep draw presses where the metal "flows" in from the edges.

.andy

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I'm sure a stainless steel sink I put in recently had the bowl made as a separate part and joined to the top. It wasn't visible inside the sink, but there was clearly a seam visible on the underside. Might have been an IKEA sink -- I'll take a closer look next time I'm nearby it.

Often different grades of S/S or Chroime Iron are used. Onemight be magentic and the other not. I suspect that the bowls are deep drawn and they have to select a (probably costly) alloy that will let them do that whilst the tops are cheaper but will only take a few grooves.

No doubt someone has worked out that the saving on material cost jutifies the effort of joining the the parts.

The Franke one I installed in our kitchen recently is definitely like that. The bowl is obviously made separately and joined to the drainer.

Press and the metal does stretch a LOT.

Some bowls are tack welded to drainers afterwards as well.

That was brilliant! Thanks.

Mary

You mean when you're degreasing the engine block?

Mary