CAMBRIDGE — The future of the AC Precision Components injection moulding plant in Cambridge is in doubt with the layoff of a large number of employees this week.

Employees say the business, which was placed in receivership in May, appears to be winding down its operations.

For many years, the plant was part of the precision components group of ATS Automation Tooling Systems. The group, which produced plastic parts for the automotive, medical, consumer and electronics industries, employed more than 600 people in 2007.

But as the economy faltered and auto sales plunged, the workforce declined. A steep drop in sales led ATS to sell the group early last year.

More than 100 employees worked in the injection moulding facility acquired by Anderson-Cook Inc. The company, based in Clinton Township, Mich., relocated the operation from ATS’s campus on Fountain Street to a building on Eagle Street last fall.

In May, Zeifman Partners Inc. was appointed as the receiver as the business struggled to pay off debts. On Monday, a large number of the employees received layoff notices.

Leona Charlton, 55, of Kitchener, who worked at the business for 18 years, said major customers have removed their tooling from the plant.

She said employees have been told that the work is gone for good and the plant will “eventually” shut down, once current contracts have been completed.

About 30 people on the morning and night shifts were laid off when they got to work on Monday, she said. Meanwhile, employees on the afternoon shift were called at home and told not to come in.

For Charlton, whose husband died on May 29, losing her job was a huge double blow in a short period of time. “I lost my husband and then five weeks later I lost my job, so it is hard . . . I try to smile, but it is hard. I have big shoulders, but not that big,” said a tearful Charlton.

She earned about $15 an hour as a machine operator and said she was told she won’t be receiving any severance because the company is in receivership and the workers are not secured creditors. She is not sure where she will find another job.

Neither the company nor the receiver returned phone calls.