Abstract: A gluing method of a filter cartridge includes: preparing a filter core and a filter frame; disposing them in a lower mold with the filter frame under the filter core; filling glue on top of the lower mold, extending the glue to a gluing segment of the filter frame and an outer surface of the filter core; pressing down an upper mold toward the lower mold to cut the glue into an inner glue segment and an outer glue segment. The inner glue segment is pressed in between the filter frame and the filter core, coated around the gluing segment to increase adhering area. Pressure from the upper mold enhances the adhering effect. The cutting removes surplus glue and the glue is formed into a desired shape, thus the method is quick, accurate and consistent.

Abstract: A filter cartridge comprises a filter core, a filter frame, glue, and at least one sealing unit. The filter frame is mounted around an axial end of the filter core and has a frame body, an abutting segment, and a gluing segment. The abutting segment axially protrudes from and annularly extends along an edge of one of two axial end openings. The gluing segment axially protrudes from and annularly extends around the abutting segment, and surrounds the filter core. The glue is coated on and is wrapped around the gluing segment, extends into a position between the gluing segment and the filter core, and attaches to an inner gluing surface of the gluing segment, an outer gluing surface of the gluing segment, and an outer surface of the filter core. Therefore, the adhering area between the glue and the filter frame is effectively increased.

Abstract: A filter frame, a filter cartridge and a gluing method of the filter cartridge are provided. The method includes: preparing a filter core and a filter frame; disposing them in a lower mold with the filter frame under the filter core; filling glue on top of the lower mold, extending the glue to a gluing segment of the filter frame and an outer surface of the filter core; pressing down an upper mold toward the lower mold to cut the glue into an inner glue segment and an outer glue segment. The inner glue segment is pressed in between the filter frame and the filter core, coated around the gluing segment to increase adhering area. Pressure from the upper mold enhances the adhering effect. The cutting removes surplus glue and the glue is formed into a desired shape, thus the method is quick, accurate and consistent.