摘要:
An extruder or a dual head extruder for a three-dimensional additive printer can be used to receive and dispense material. The extruder can include a number of different components including a nozzle with an adjustable opening configured to discharge material or two nozzles with at least one having an adjustable opening configured to discharge material. The nozzle or adjustable opening can be configured to be moved and rotated so as to align the adjustable opening with a plurality of paths along which the material is configured to be deposited for generating a three-dimensional object. The adjustable opening can comprise a first orifice and an obstruction member configured to move with respect to the first orifice. The position of the obstruction member can adjust the size of the opening area of the adjustable opening.
摘要:
The invention relates to device and method enabling industrial continuous pressing, called extrusion of plastically / thermally mouldable substances (11) such as metal, composite metal, plastic, composite or rubber, which is pressed to the profile (12) by a process comprising tool fixed member (6) partially predefining the profile shape / cross-section before the profile finally defined to fixed or varied cross-section when the material passes rotating dies (2) which can be patterned or smooth and through the contact with each other (1) cancel out each main radial forces and the position of which in some embodiments of the invention may vary relative to other bearing surfaces (13, 17) or rotary bearing surfaces (4) of the tool with which they define the final shape of the profile.The invention enables the extrusion of pattern on the inside of hollow profiles and the extrusion of multiple profiles in one tool, because 80-98% of the radial bearing forces are eliminated, allowing the installation of rotary dies where not previously possible, and almost unlimited opportunities in increased profile width.
摘要:
Procedimiento de fabricación de filamentos de poliacrilonitrilo y cabezal de extrusión para realizar dicho procedimiento, comprendiendo la preparación de una solución de polímero poliacrilonitrilo y el paso de dicha solución a través de una placa extrusora (9) que determina la formación de filamentos, estando definida entre la placa extrusora (9) y una placa flotante (15) que está unida a un sistema vibrador (17), una cámara central (14) que está rodeada por una cámara periférica (12) en la que se introduce a presión la solución de polímero, para pasar a la cámara central (14) a través de unos pequeños conductos radiales (13) que aceleran el material, siendo sometida dicha solución de polímero en la cámara central (14), a una vibración, antes de pasar a través de la placa extrusora (9).
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:
Processes by which bulk forms can be produced in a single continuous operation, as opposed to multi-stage deformation processes that involve a series of separate and discrete deformation operations or stages. Such processes generally entail deforming a solid body using a large-strain extrusion machining technique and deformation conditions that obtain a predetermined crystallographic texture in the continuous bulk form that differs from the crystallographic texture of the solid body.
摘要:
Zur Herstellung eines aus einem schäumbaren Material (17) gebildeten Strangs (18) durch Extrudieren des unter Druck stehenden Materials (17) durch eine Extrusionsdüse (9) mit einer Austrittsöffnung (11), aus der das Material (17) unter Aufschäumen austritt und den Strang (18) bildet, ist vorgesehen, dass in die Extrusionsdüse (9) Nadeln (1) eingesetzt werden, die von dem Material (17) umströmt werden und die so in dem Bereich der Austrittsöffnung (11) enden, dass beim Aufschäumen in und stromabwärts von der Austrittsöffnung (11) die durch die Nadeln (1) gebildeten Längskanäle (19) nicht mehr geschlossen werden. Die Längskanäle (19) sind in ihrem freien Querschnitt einstellbar. Bevorzugte, nach dem Verfahren hergestellte Produkte sind Filter für Rauchprodukte, insbesondere Zigaretten und rauchbare Schaumprodukte aus Tabak.
摘要:
In order to produce a brush (2), especially an interdental brush, e.g. two core bars (80, 81) are extruded with at least one molded-on lamella (82, 83, 84, 85) by means of an extrusion process. The lamellae are subsequently divided into bristle elements. The inventive interdental brush can also be produced in an intermittent bar extrusion process by extruding at least one core bar with at least one molded-on row of bristles. The brush that is produced according to said methods is twisted in an additional step such that the bristles are disposed helically in the longitudinal direction of the brush.
摘要:
The present invention relates to a method and apparatus for building structures including residential and commercial structures using a dynamic flexible extrusion process and associated apparatus. NMore particularly, the present invention relates to a dynamic extrusion process by which interior, exterior, bearing and non-bearing walls, floors and/or ceiling are constructed in one extrusion process using curable materials pumped into a mold (200) designed for a desired extruded configuration or shape or extrudate profile, where the model can follow a predetermined course of a course varied on-the-fly. The invention also relates to a moving mold apparatus that permits an entire structure to be constructed onsite.
摘要:
The device is comprised of an extrusion die (1) of which the opening (2) is a section without any break in continuity and forming a frieze of concurrent rectilinear or curvilinear segments and is also comprised of a mask (3) having a reciprocating sliding motion in front of the die (1) and provided with a window uncovering only a portion of the section (2) varying with the motion of the mask.