公开(公告)号：DE3213153A1

公开(公告)日：1983-10-20

申请号：DE3213153

申请日：1982-04-08

Applicant: BASF AG

Inventor： METZINGER LOTHAR DIPL CHEM DR ,  THIELE HEINO DIPL ING DR ,  ZETTLER HANS DIETER DIPL ING D ,  WALLNER JOSEF

IPC: B29B7/76 ,  B29B1/06

Abstract: Mixing head for multi-component plastics, in particular polyurethane, in the cylindrical mixing chamber (3) of which a corresponding ram (6) is able to move back and forth for controlling the component flows. The outlet opening (14) of the mixing chamber (3) is made in the shell of the mixing chamber and opens out into a cylinder space (5) which is axially parallel to the mixing chamber and in which a pull-back ram (7) is guided in a sealing manner. The cylinder space (5) forms a stabilising zone for the mixture of plastics components, so that, given an adequately laminar flow, the said mixture can enter a mould.

公开(公告)号：DE3210978A1

公开(公告)日：1983-09-29

申请号：DE3210978

申请日：1982-03-25

Applicant: BASF AG

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

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 ,  B29B1/06 ,  B29D27/02

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.

公开(公告)号：DE2828725A1

公开(公告)日：1980-01-03

申请号：DE2828725

申请日：1978-06-30

Applicant: BASF AG

Inventor： ZETTLER HANS DIETER DIPL ING ,  FLOHR JOACHIM DIPL ING ,  ENGLER PETER DIPL ING DR ,  SAPPOK REINHARD DIPL CHEM DR ,  SCHNEIDER WOLFGANG DIPL ING DR ,  THIELE HEINO DIPL ING DR ,  KRAUSE HANS-JOACHIM DIPL CHEM ,  HOFFMANN HELMUT

IPC: B01F23/47 ,  C09D7/80 ,  B01F3/10 ,  B01F11/00 ,  C09D7/14

Abstract: Thick liquids are blended and homogenised by continuous passage through varying shear field. Here they are subjected to a shear frequency of 5 to 1000 Hz with a shear stress of >=103 N/m2. The portion of liquid subjected to shear at any moment should not exceed a total volume of 1-40%. The high shearing follows a zone of relaxation. The ratio of through put to shearing surface is 5.103 to 25.103 kg/m2h. The viscous liquid can contain up to 80% wt. of dispersed solids, and chemical reactions or crystallisation can occur during the process.