公开(公告)号：DE3341308A1

公开(公告)日：1984-05-17

申请号：DE3341308

申请日：1983-11-15

Applicant: BASF AG

Inventor： THIELE HEINE DR ,  WEBER WERNER DR ,  SCHLUETER KLAUS ,  TAUBENMANN PETER ,  WALLNER JOSEF ,  SIED BERNHARD ,  ZETTLER HANS DIETER

IPC: B01F5/06 ,  B29C33/00 ,  B29C45/27 ,  B29F1/022 ,  B29D27/02

Abstract: The post-mixer for split casting moulds (1, 2) for the processing by shaping of multi-component plastics has a channel system disposed in the parting plane and exhibiting mould throttle points. The channel system consists essentially of a main feed channel (4), which after a first throttle point (5) is branched into at least two side channels (6) and (7). For a smooth entry of the plastics component composition into the mould cavity of the casting mould as well as for a uniformly good mixing intensity throughout the entire injection cycle, the side channels have several throttle points (9, 10, 11) and (12, 13, 14), a change of direction of the side channels taking place between each two throttle points. The side channels open into a further chamber (19) connecting with a feed channel (20) leading to the mould cavity (21).

公开(公告)号：DE3380874D1

公开(公告)日：1989-12-28

申请号：DE3380874

申请日：1983-03-16

Applicant: BASF AG

Inventor： THIELE HEINO DR ,  WEBER WERNER DR ,  ZETTLER HANS DIETER ,  SCHLUETER KLAUS ,  WALLNER JOSEF ,  SEID BERNHARD

IPC: B29C65/00 ,  B01F11/00 ,  B01F15/00 ,  B29B7/00 ,  B29B7/08 ,  B29B7/22 ,  B29B7/28 ,  B29B7/34 ,  B29B7/74 ,  B29B7/76 ,  B29B9/00 ,  B29C53/00 ,  B29C65/48 ,  B29C65/70

Abstract: A mixing head for multicomponent plastics, especially polyurethane, in whose mixing chamber (2) a hollow piston (7) can be moved to and fro to control the component streams. The hollow piston contains an expulsion piston (8), which is movable independently of the hollow piston, and which can be passed through an outlet tube (3) which adjoins the outlet orifice (4). The end face (12) of the hollow piston forms, together with the mixing chamber wall (11) nearest the sprue, a shearing gap in which the components are mixed. As a result of the design and arrangement of the pistons (7) and (8), good mixing is achievable even under critical conditions, and the mixing chamber is also easily cleaned.