公开(公告)号：US20230091065A1

公开(公告)日：2023-03-23

申请号：US17908402

申请日：2021-03-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas Q, Chastek ,  Garth V. Antila ,  IIya A. Salnikov ,  Richard P. Lovelien ,  Gibson L. Batch

IPC: B29C48/51 ,  B29C48/395 ,  B29C48/25

Abstract: Provided are an apparatus and methods for dispensing a composition, the apparatus includes a barrel (120) having an inlet (128) and an outlet (129), a screw (122) received in the barrel, and a drive mechanism operatively coupled to a shank end (134) of the screw to rotate the screw. The screw is hollow and includes both interior and exterior surfaces, the interior surfaces defining a cavity (142) adjacent to the outlet, and wherein the screw further includes a plurality of apertures (140) through which the cavity and exterior surfaces communicate with each other. The apertures are located along a perforated portion (146) of the cavity, where the perforated portion can have a transverse dimension that increases with distance from the shank end. The apertures can also provide a hole area, relative to the exterior surface of the screw, that increases with distance from the shank end. The screw can also include a helical flight (132) having a raised flight section (150) and one or more lowered flight sections (152), where the apertures are at least partially located on the lowered flight section.

公开(公告)号：US20240173908A1

公开(公告)日：2024-05-30

申请号：US18283655

申请日：2022-03-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Thomas Q. Chastek ,  Mark E. Napierala ,  Mark F. Schulz ,  Ross E. Behling ,  Ilya A. Salnikov ,  Richard P. Lovelien

IPC: B29C48/52 ,  B29C48/535 ,  B29C64/118 ,  B29C64/209 ,  B33Y30/00

CPC classification number: B29C48/52 ,  B29C48/535 ,  B29C64/118 ,  B29C64/209 ,  B33Y30/00

Abstract: Provided is an apparatus for dispensing a composition that includes a barrel having an inlet and outlet, an extrusion screw, and a drive mechanism operatively coupled to the extrusion screw. The extrusion screw includes a shaft having a shank end for connection to the drive mechanism and a distal end opposite the shank end. A first helical flight extends around a first section of the shaft, and a second helical flight extends around a second section of the shaft. The second section is located distal to the first section and the first helical flight has a nominal outer radius less than that of the second helical flight, and optionally the first helical flight has a pitch shorter than that of the first helical flight.