Spray cap molds are used in the molds for producing insecticide shells. They are made in accordance with the shape of the insecticide cover required. They are injection molded with plastic and processed into insecticide shell parts through various processes. The principle of the spray tank is that the liquid is pressed out of the valve by using air pressure. The liquid can be sprayed evenly. The direction and dose can be controlled. Any content can be easily put in and easy to use.