A manufacturing method of burette is provided. The steps include:offer a mold. Inject PP to mold a ring, and form a through hole and a plurality of connecting holes on the ring. The connecting holes are around the through hole. Inject thermal plastic rubber in the connecting holes to mold a film which cover the through hole and the connecting holes. As a result, we have no need to make another molding and assembling process by hand. The cost is saved. Instead of using glue to assemble film with the ring, it can prevent the film departing from the ring efficiently, and save the human being.一種計量筒止擋閥製造方法,步驟包括:提供一模具;將聚丙烯於該模具內射出,成形一環體,並於該環體上成形一貫孔及多個環繞於該貫孔周圍之結合孔;以及將熱塑性橡膠於該環體上的結合孔處射出,一體成形一薄膜,並使該薄膜包覆於該貫孔與該些結合孔;藉此,不需開設不同模具,省去人工組裝步驟,有效降低製造成本,且不需使用黏劑組裝薄膜與環體,有效防止薄膜脫落,保障人體生命安全。1...計量筒止擋閥11...環體112...結合孔113...氣孔114...氣槽115...頂出點12...薄膜
