Abstract

The invention relates to a method and to a device for producing endless strands, particularly plastic strands having structure in the longitudinal axis. According to the invention, form elements (14, 15) bounding a form cavity (4) are brought together and aligned with each other in rows for making a form cavity (4), the form cavity (4) is moved in the longitudinal axis of the rows and casting material is brought into the form cavity (4) at a gate location running against the direction of motion through a side opening (5) of the form cavity (4), and the form cavity is opened continuously at a distance from the gate location while moving the form elements apart, in order to demold an endless strand solidified in the form cavity (4).

IPC Classes  ?

• B29C 47/32 - Roller-extrusion nozzles
• B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
• B29C 47/12 - Extrusion nozzles or dies
• B29C 47/08 - Component parts, details or accessories; Auxiliary operations
• B29C 47/90 - with calibration or sizing
• B29C 45/56 - Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
• B29C 47/88 - Heating or cooling the stream of extruded material

Abstract

The invention relates to a butt joint between ends of sealing strips (1,1') or of a sealing strip, comprising a connecting piece (2) for engaging into cavities (5) in the sealing strips (1,1') or in the sealing strip, said chambers being open at the front face thereof. According to the invention, the connecting piece (2) has devices (7,9) for hooking onto the walls of the hollow chambers (5).

IPC Classes  ?

• B60J 10/00 - Sealing arrangements
• F16J 15/10 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing

Abstract

The invention relates to a method and to a device for producing endless strands, particularly plastic strands having structure in the longitudinal axis. According to the invention, form elements (14, 15) bounding a form cavity (4) are brought together and aligned with each other in rows for making a form cavity (4), the form cavity (4) is moved in the longitudinal axis of the rows and casting material is brought into the form cavity (4) at a gate location running against the direction of motion through a side opening (5) of the form cavity (4), and the form cavity is opened continuously at a distance from the gate location while moving the form elements apart, in order to demold an endless strand solidified in the form cavity (4).

IPC Classes  ?

• B29C 47/12 - Extrusion nozzles or dies
• B29C 47/32 - Roller-extrusion nozzles

Abstract

The invention relates to a sealing thread, particularly for sealing hatches on vehicle bodies, having a cross-sectional region (9) made of a sealing mass, particularly plastically deformable, that is soft compared to the adjacent thread material. According to the invention, the cross-sectional region (9) is produced by extrusion, preferably by coextrusion with the remaining sealing thread.

IPC Classes  ?

• B60J 10/00 - Sealing arrangements