Independent mold capable of producing ultra-small PET packing belt

The invention belongs to the technical field of packing belt mold equipment, and particularly discloses an independent mold capable of producing an ultra-small-specification PET packing belt, the independent mold is provided with a front mold and a rear mold, the front mold is provided with a main runner, the rear mold is correspondingly provided with a branch runner, the bottom of the branch runner is sequentially provided with N cavity entering runners, N is larger than or equal to 1, and N is an integer; the main runner is communicated and connected with the branch runners; a gap is reserved between every two adjacent cavity inlet flow channels; a mold cavity is formed in the lower part of each cavity inlet runner in a penetrating manner, and a mold opening is formed in the bottom of each mold cavity; the rear mold is correspondingly provided with an adjusting through hole above the port of the inlet cavity runner, and the adjusting through hole is correspondingly provided and connected with an adjusting s