There's always going to have to be some level of socialization with any job, and some may require more than others that you wouldn't think about. Factory jobs aren't always quiet and keep to yourself. The last factory job I had, vocalization was actually a good thing and was essential. People that were too quiet and kept to themselves too much on one part of the line actually wound up hurting the process because teamwork was essential to getting the job done. Granted, you weren't being asked to have discussions or make friends, but it was essential to talk to your other coworkers and supervisors if something was wrong or if you or anyone else needed help catching a line. Going with the flow, paying attention and listening, and being able to adapt quickly to any changes in your surroundings is often essential for factory jobs and it's something I actually like. Keeps me on my toes and keeps me thinking.
I'm actually back in a production facility, but not in a factory setting. It's no where near as fast-paced as to what I was used to, working with no where near as many people, but it seems like plans change daily on the fly, so again, another job needing adaptability. So far it hasn't been too social of a job and I'm liking it, but I'm eventually going to have to learn how to answer phones which I'm dreading and wasn't expecting to do. So if you're looking into production jobs, research the factory and the company as much as you can -- going with smaller companies is usually a good start, but just be aware there may be a level of socialization required you may not realize until you're actually hired.