This is a poor movie, and the fact it runs for an hour and 45 minutes does little to help it out.
Based on a short story by Stephen King that's no longer than ten pages, The Mangler brings to us the story of an evil laundry folding machine. If the movie took itself a bit less seriously, it may have turned out okay too. But no. Director Tobe Hooper kept this movie serious, and while goofy acting by Robert Englund may make one question that conclusion, throughout the film, little humor is present.
The main characters are fine enough, but not overly enthralling. And some of the gore is good also, which is only a plus. But things don't work together - the plot twist at the end seemed to be thrown in there, and just doesn't strike me as overly realistic. The movie's quite simply not good, and while I've not seen it in years before this rewatch, I recall not caring for it much then either. For good reason.