摘要:
A calibration cage for the production of a blown film comprises a supporting structure (1) and a plurality of frames (2) rotatable in the horizontal plane which are pivoted along the perimeter of the supporting structure (1) at the vertices of a regular polygon, each frame (2) carrying a vertical rod (3) rotatable with respect thereto which in turn carries at least one element (4) for guiding a blown film, each vertical rod (3) being connected to the vertical rods (3) adjacent thereto through connection elements (8) that are rigid in the horizontal plane yet have a length variable in said plane, each connection element (8) being pivoted between two horizontal pivots each of which forms with a vertical radial plane comprising the axis of rotation of the respective vertical rod (3) an angle that is equal to half of the internal angle (a) of said regular polygon.
摘要:
A system is disclosed for manufacturing multi-wall corrugated polymer pipe The system includes an extruder configured to co- extrude concentric annular tubes, a corrugator configured to form the concentric annular tubes into a dual-wall pipe having a smooth wall and a corrugated wall, a cross-head die configured to extrude an outer wall of pipe onto the corrugated wall of the dual-wall pipe, a vacuum punch configured to penetrate the outer wall of pipe and draw a vacuum between the corrugated wall and the outer wall, such that the outer wall of pipe deforms inward toward the corrugated wall of pipe between bell and spigot portions of the corrugated wall, and a cutter configured to cut the pipe into sections where the vacuum punch deformed the outer wall between the bell and spigot portions of the corrugated wall A method of manufacturing multi-wall corrugated polymer pipe is also disclosed.
摘要:
An adjustable sizing sleeve for pipe extrusion is provided. The sizing sleeve is a hollow, cylindrical body with a helical gap formed in the body. The helical gap allows the sleeve to be twisted by rotating opposing ends in opposite directions and resulting in a contraction of the inner diameter of the sleeve In another embodiment, a high intensity cooling feature of a calibrator assembly for extrusion is provided. The cooling feature is designed to provide a high Reynolds number and high pressure of cooling fluid flowing to a sizing sleeve (or other calibrator) of an extrusion assembly to provide sufficient cooling of the front-most portion of the sleeve to maximize heat transfer between the outer surface of the material being extruded and the inner surface of the front-most portion of the sleeve to fully solidify the entire surface of the material being extruded
摘要:
Die Erfindung betrifft eine konkav-konvexe Düsenplatte (4) mit einer Anordnung der Düsen (3) auf der konvexen Seite. Diese Düsenplatte bzw. eine damit ausgestattete Extrusionsvorrichtung (2) eignet sich für die Extrusion von Kunststoff schmelzen in der Stranggranulation.
摘要:
Process and die for manuf acturing a plastic hollow body Process for manufacturing a plastic hollow body by moulding a molten plastic parison, which is extruded vertically through a die, in a mould comprising two complementary cavities, characterized in that the die is adjusted so that the shape of the parison matches that of the mould cavities. Die suitable for such a process.
摘要:
Verfahren zum Betrieb einer Produktionsanlage zur Herstellung eines Stranges, bei dem in mindestens einem in seiner Schneckendrehzahl veränderbaren Extruder mindestens eine Schicht des Stranges aus Kunststoff extrudiert wird, wobei die Geschwindigkeit des Stranges (Liniengeschwindigkeit) veränderbar ist und bei dem ferner der Durchmesser und/oder die Wanddicke der Schicht im Abstand vom Extruder mit einem Meßkopf gemessen wird, gekennzeichnet durch folgende Schritte: - in einem Rechner wird in einem Extrudermodell ein Algorithmus gespeichert zur Berechnung von Durchmesserwerten und/oder Wanddickenwerten der Schicht unter Berücksichtigung der drehzahlabhängigen Ausstoßleistung des Extruders, des Innendurchmessers der Schicht und der Liniengeschwindigkeit, - das Extrudermodell wird aus dem Volumenausstoß (Extruderleistung) durch Messung der Wanddicke und/oder des Durchmessers, der Extruderdrehzahl, der Liniengeschwindigkeit und des Innendurchmessers und/oder des Kerndurchmessers erstellt, - bei Herstellung des Stranges wird in dem Extrudermodell für einen Innendurchmesser, eine Liniengeschwindigkeit, eine Schneckendrehzahl des Extruders und drehzahl abhängige Daten für die Ausstoßleistung des Extruders der vom Extruder vorhersehbar erzeugte Wert für Durchmesser und/oder Wanddicke errechnet, - der errechnete, vorhersehbare Wert für Durchmesser- und/oder Wanddicke wird angezeigt und - durch Änderung der Schneckendrehzahl des Extruders und/oder der Liniengeschwindigkeit wird der errechnete und angezeigte Wert für Durchmesser und/oder Wanddicke auf den Sollwert für Durchmesser und/oder Wanddicke gebracht.
摘要:
Mittels des erfindungsgemässen Verhaltens und der dabei verwendeten Vorrichtung aus Kalibrierbuchse (1) und Wasserringdüse (2) aus einer Messinglegierung mit Cu: von 89 bis 95 Gew.-%, Zn: von 0,3 bis 0,7 Gew.-%, Pb: von 0,4 bis 2 Gew.-%, Sn: 10-13 Gew.-%, Ni: 0,3-0,7 Gew.-% ist es möglich, Rohre aus transparenten Kunststoffen mit sehr guter Oberflächenqualität herzustellen.
摘要:
Process for forming a dimensionally variable tubular member (40) for use in catheterization procedures. The process includes a mechanism (42) for extruding a tubular member (40). A variable speed puller (50) pulls the tubular member (40) through or from the extruder means (42) at a selectively variable speed. A variable air or gas pressure supply (46) supplies pressurized air or gas to the extrusion mechanism (42) at a selectively variable rate. The dimensionally varying tubular member (40) may be cut to desired lengths for use as catheter shafts (12) or catheter soft tips (20). The process may include forming a tubular member (60) having a dimensionally varying first layer and a dimensionally varying second layer, wherein a portion of the first layer at a distal end (32) of the tubular member (60) is removed.
摘要:
The invention relates to an annular die (1) on an extrusion head for producing tubular or sheet-like preforms with an arcuate die gap and with a melt channel (4) delimited by a mandrel (2) and a die body (3), the cross-sectional profile of the melt channel (4) being variable by way of adjusting elements, the annular die according to the invention being distinguished by the fact that the outer circumference of the melt channel (4) is at least partially delimited directly by at least one radially adjustable slide (5), that the slide (5) is formed by a number of segments that can be adjusted together from at least one first position into at least one second position, and that the segments in each position form a respectively closed arc portion of the delimitation of the melt channel (4), the radius of the arc portion being different according to the position of the segments.
摘要:
The present invention relates to an apparatus and method for manufacturing a fine porous film to be used as a separation film of a secondary battery. The apparatus for manufacturing the fine porous film of the present invention comprises: a T-shaped die (20) for forming a precursor film by extruding a melted resin generated by melting a partially crystalline resin through the front end of a nozzle; a guide roller (50) arranged at a downstream side of the extrusion direction of the T-shaped die (20) so as to move and guide the precursor film (F1) at a predetermined draft ratio; a precursor film cooling means (40) for providing, in the moving direction of the precursor film, a flow of cooling air over either or both of the front and back surfaces of the precursor film so as to cool the precursor film; and a film elongation means for applying a tensile force, in an axial direction or in biaxial directions, to the cooled film while same is passing through the precursor film cooling means (40).