Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Herstellung von porenfreien Profilen aus Trennresten mittels Strangpressen, aufweisend eine Strangpresse (1) mit einer Verdichtungskammer (11) aus einem Pressstempel (5), einer Pressmatrize (6) und einem Rezipienten, in die ein Haufwerk (2) bestehend aus Trennresten trennender Fertigungsverfahren oder dgl. wie Spänen oder Restmaterialien eingefüllt wird. Hierbei wird zwischen Pressmatrize (6) und Verdichtungskammer (11), die Verdichtungskammer (11) pressmatrizenseitig abdichtend ein Abdeckelement (3) angeordnet, gegen das der Pressstempel (5) das Haufwerk (2) aus Trennresten zu einem Pressling (2) verdichtet und dabei in der Verdichtungskammer (11) und in dem Haufwerk (2) verbleibende fluide Einschlüsse gerichtet, etwa durch einen konisch vorgewölbten Pressstempel radial nach außen, entfernt und abgeführt werden, wonach das Abdeckelement (3) wieder entfernbar und der verdichtete Pressling (2) durch die Pressmatrize (6) als Profilquerschnitt durchdrückbar ist. Das Haufwerk (2) wird ggf. unter Erhitzung von dem Pressstempel (5) zunehmend verdichtet und der Pressling (2) anschließend über einen vorgebbaren Zeitabschnitt unter gleichbleibendem hydrostatischen Druck gehalten, wodurch in dem Haufwerk (2) und/oder Pressling (2) verbliebene fluide Einschlüsse gerichtet und weitgehend vollständig ausgetrieben werden.
Abstract:
A new way to design lightweight, strong,material efficient, extruded and pultruded profiles,profile segments (4) and surfaces produced in profile production with rotating dies creating superior resistance to compression, bending and buckling, higher energy absorption and right strength in the right place, by: varying the thickness along (_t) + across the direction of extrusion, making reinforcing patterns (2, 3), vary the profile thickness (t, _t), and in some cases vary angles (10, 11) and pattern (2, 3) which increases the profile segments / surface resistance against compression, bending and buckling relative to the amount of material used and resulting in that one can make optimized beams and surfaces that have superior properties in terms of strength / weight, stiffness/weight ratio, mechanical energy absorption/ weight unit, deformation and natural frequency, thermal transfer capacity, the breaking of the laminar flow, increased / optimized surface for chemical and / or electrochemical reaction etc.
Abstract:
Extrusion of feed materials of a high temperature formable non-ferrous metal susceptible to embrittlement during air processing uses an extrusion system having a rotatable wheel and shoe covering part of the length of a groove around the periphery of the wheel to form an arcuate passageway, the shoe having an abutment which substantially closes a second end of the passageway and an extrusion die spaced from the abutment by a die chamber. The process includes pre-heating the feed material to not less than about 390û C in a chamber defined by a feeder device, maintaining a protective atmosphere in the chamber of the feeder device while the feed material is heated. The pre-heated feed material then is passed to an inlet end of the passageway, and drawn along the passageway, to be forced by the abutment into the die chamber and through an extrusion orifice of the die to provide extruded product.
Abstract:
The invention relates to a method for extruding a profile or a similar billet (50) from a bolt or bar (30, 30a) that is guided in a recipient bore (16) of a recipient (14) and that is extruded by means of an extrusion die (10) through a shaping section (46) of a shaping tool (38). Once the front face (34a) of the bar (30) is placed on the rear surface (33a) of a preceding bar (30a), air or similar flowing agents present on said surfaces (33a, 34a) are discharged during pressure build-up in an approximately radial relation together with the contaminations that are present in detached form on the transversal bur surface. During pressure build-up, parts of the transversal burs are radially displaced; the displaced parts of the transversal bur surface are discharged on the periphery in an approximately radial relation before the bar enters the shaping tool (38). To achieve this, a welding chamber or pre-chamber (70) is disposed in the direction of extrusion (x) in a gap that can be adjusted between the recipient (14) and the shaping tool (38). Said chamber is provided with at least one lateral opening or discharge channel (72) through which the displaced parts of the transversal bur are discharged.
Abstract:
A friction stir processing system can include a rotatable die assembly. The rotatable die assembly can include a die body and a plurality of die segments. The die body includes a die base and a die stem. The die stem extends axially from the die base, the die stem defines an extrusion cavity, and the die body is formed from a first material. The plurality of die stems are coupled to the die stem. The plurality of die segments are disposed around the extrusion cavity to collectively form a die surface opposite to the die base. The plurality of die segments are formed from a different material than the die body.
Abstract:
An extrusion apparatus reduces swelling in an extruded material. The apparatus is configured to reduce swelling by inducing shear stress in an at least partially molten material (e.g., polymers, metals, glasses, and/or other materials) that is being extruded through a nozzle. The apparatus is configured to induce the shear stress in the at least partially molten material via one or more oscillating transducers coupled with the nozzle.
Abstract:
The invention relates to a method and an appliance for producing terminals for automotive batteries, including pressing means, gang-punching means and punching means in the same appliance.
Abstract:
A method for preparing a shear-assisted extruded material from a powder billet is provided, the method comprising providing a billet of material in substantially powder form; applying both axial and rotational pressure to the material to deform at least some of the contacted material; and extruding the material to form an extruded material. A method for preparing shear-assisted extruded material is provided, the method comprising applying both axial and rotational pressure to stock material to form an extruded material at a rate between 2 and 13 m/min.
Abstract:
본 발명은, (a) (i) 알루미늄 또는 알루미늄 합금 및 (ii) 탄소나노튜브(carbon nanotube, CNT)를 포함하는 복합재료를 제조하는 단계; (b) 상기 복합재료로 이루어진 빌렛(billet)을 제조하는 단계; 및 (c) 상기 빌렛을 소성 가공하고 실린더 헤드 형태로 기계 가공하는 단계를 포함하는 압착 기계용 알루미늄 복합재료 실린더 헤드의 제조방법에 대한 것으로서, 본 발명에 의하면 탄소나노튜브로 강화된 알루미늄 기지의 이종 복합재료를 이용해 실린더 헤드를 제조함으로써 기존의 압착 기계용 실린더 헤드의 다양한 문제점을 극복하고 고강도, 초경량성 및 고내구성을 가지는 압착 기계용 실린더 헤드를 제조할 수 있다.