Combination sofa integrated threaded connection mechanism and processing mold thereof

A combination sofa integrated threaded connection mechanism comprises a seat plate, a back plate, a front retainer, a rear retainer, a left armrest plate, and a right armrest plate which are made witha plastic material by injection molding. The left armrest plate, the right armrest plate, the seat plate, the back plate, the front retainer and the rear retainer are fixedly assembled and fixed through a connection mechanism. The connection mechanism includes hollow pillars arranged on the two sides of the left armrest plate and right armrest plate respectively; a connection post is arranged onthe inner wall of each hollow pillar; a connection hole is arranged in each connection post; a screw threaded is integrally formed in each connection hole; a gap is arranged between the start and stopof each screw thread; the rear walls of the left and right armrest plates, corresponding to the screw threads, are provided with through channels; the assembly connections of the seat plate, the backplate, the front retainer,