The invention relates to a press-type
foam pump and a
discharge rate control method thereof and aims to solve the technical problems that conventional like products are inconvenient in
discharge rate changing and controlling, and need to be further improved in structural design. The press-type
foam pump is mainly characterized in that an outwardly protruding convex clasp ring and a tapered limit opening are respectively formed at the nesting parts between a valve rod and a pump body, downward movement of a
piston driven by a duckbill is the
stroke that a limit ring at the external
diameter of the valve rod moves downwards to be propped against the limit opening of the pump body, the limit opening of the pump body is provided with a cylindrical glue site protruding toward the interior of the pump body, and the cylindrical glue site is subjected to integral injection molding with the limit opening and the pump body. Therefore, the
discharge rate of the
foam pump is changed only by changing the structure of the limit opening in the pump body on the basis of not changing the integral structure of the foam pump, that is, the
discharge rate of the foam pump is controlled by controlling the downward movement of the
piston via the length of the cylindrical glue site. Accordingly, sharing of product parts and the university of automatic
assembly equipment are effectively improved, the production efficiency is improved,
energy consumption is reduced, and the production cost is lowered.