Green’s Dictionary of Slang

1. a shop, esp. a pork butcher’s shop because of the noise of the sausage machine.

1909

J. Ware Passing Eng. of the Victorian Era.

2. (US, also hunger foundry) a restaurant.

1894		Mirror of Life 20 Jan. 7/3: ‘[E]f I had [a stake], you bet yer life I wouldn't be slinging hash in no d— foundry’.
1908		K. McGaffey Sorrows of a Show Girl Ch. ii: I was going to balk and rear in the harness when he started to lead me up the steps of the foundry.
1914		‘Hugh McHugh’ You Should Worry cap. 3: It never struck me that I had to take a course in French before entering the Builtfast hunger foundry.

3. see booze foundry under booze n., doughnut foundry under doughnut n.¹ , hash factory under hash n.¹ , nut foundry under nut n.² and shicker-foundry under shicker n.