What is plastic wire ironing?

Before the final folding of the folding machine, it is similar to the principle of saddle stitching to form a thread. A special plastic thread is threaded from the inside out of the last fold of each signature. The plastic thread that is inserted is cut off Afterwards, the two ends (two stitching heads) are outwards to form the outer stapling foot of the signature, and then heated at the stapling foot to melt the plastic thread and adhere to the crease of the signature. After collapsing and forming the pages, the cover of the bag, and the hot back, the plastic thread between the posts is glued to the back of the book to achieve the purpose of linking into a book.

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