The plastic particles are heated and melted and injected into the preform mold, which is cooled and shaped into a semi-finished product (a preform similar to the shape of a test tube, also known as a tube preform), which is heated and adjusted when the preform is not completely cooled, and then sent to the blown air mold. After stretching and blowing, the plastic of the tube blank is evenly distributed, and it is close to the blowing mold. After the high-pressure blowing is completed, the cooling air is introduced. When the cooling is completed, the blowing mold is opened, and the plastic hand sanitizer bottle is completed.