Over the years, as Simmons passed from one private equity firm to another, and as Mr. Rogers became president of the local union at the plant, he saw little difference on the plant floor. Then, in the spring of 2008, when the slowing economy had begun to hurt sales, Simmons laid off the night shift at the Mableton plant. And on Sept. 18 that year, it gathered employees in the cafeteria to say that the plant was closing.

“So many people were hurt because they thought this was a great company to work for and they planned on spending the rest of their lives here. Their families were here. They bought houses and cars here,” Mr. Rogers recalled. “After this happened, people were really struggling.”

Between the closings and other cuts, Simmons let go of more than a quarter of its work force last year, said its chief financial officer, William S. Creekmuir.

Mr. Rogers, who received his union-negotiated severance package of two months’ pay, said he and other union representatives had tried to get a little more for workers, particularly those who would have been eligible for retirement. Simmons had a long history of giving retiring employees a bonus of $20 for each year worked and a free mattress set, Mr. Rogers said.

“They wouldn’t give us anything,” he said.

In the months after he lost his job, Mr. Rogers nearly lost his home to foreclosure and struggled to pay his family’s bills. Mr. Rogers, who eventually landed a job at an air filter company and picked up part-time work doing maintenance at an apartment complex, said Simmons bore little resemblance to the company he once loved.

“They stopped the picnics. They stopped the Christmas parties. They stopped the retirement parties,” he recalled. “That showed you the type of people I was working for. I just didn’t realize it until the hard times came like they did.”

For now, the Golden Age of private equity is over, the financiers say. In a speech to an industry gathering last spring. Mr. Schoen said that bankers and bondholders were reluctant to lend more money to the buyout kings.