摘要:
Herein are disclosed apparatus and methods for impinging fluids, e.g. heated fluids, onto the surface of moving substrates and then locally removing the impinged fluid. The apparatus may comprise at least first and second fluid delivery outlets that are in diverging relation to each other. A long axis of the first fluid delivery outlet may be oriented obliquely to the path of the first moving substrate, and a long axis of the second fluid delivery outlet may be oriented obliquely to the path of the second moving substrate. The apparatus may comprise at least first and second fluid capture inlets that are locally positioned relative to the first and second fluid delivery outlets, respectively.
摘要:
Verfahren zum stoffschlüssigen Fügen zweier Werkstücke (11, 19) aus artungleichen thermoplastischen Polymeren unter Zuhilfenahme eines vorzugsweise thermoplastischen polymeren Primers (13) als Verbindungsschicht, beinhaltend die folgenden Schritte: Bereitstellen eines ersten Werkstückes (11) aus einem thermoplastischen Polymer aufweisend eine erste Randschicht (12); Bereitstellen eines zweiten Werkstückes (19) aus einem thermoplastischen Polymer aufweisend eine zweite Randschicht (20), wobei das thermoplastische Polymer artungleich hinsichtlich des thermoplastischen Polymers des ersten Werkstückes (11) ist; Vorwärmen der ersten Randschicht (12); Auftragen des Primers (13) auf die vorgewärmte erste Randschicht (12) wobei die vorgewärmte erste Randschicht (12) während des Auftragens des Primers (13) eine Temperatur im Bereich zwischen dem extrapolierten Onset der Glasübergangstemperatur für amorphe Kunststoffe oder der Peakanfangstemperatur des Schmelzbereichs für teilkristallinen Kunststoffe sowie der Stufenanfangstemperatur der Zersetzung des thermoplastischen Polymers der ersten Randschicht (12) aufweist; In Kontakt bringen der mit dem Primer (13) versehenen ersten Randschicht (12) mit der zweiten Randschicht (19); Stoffschlüssiges Verbinden der ersten Randschicht (12) mit der zweiten Randschicht (19).
摘要:
A method and apparatus (84, 94) for controlling an assembly for bonding a cover (22) over the undulating surface of a foam cushion (10) controls a tool actuator cylinder (80) to tilt a tool (18) to a loading position to permit placing the cover (22) and an adhesive layer (82) on the tool, tilts the tool to a working position to permit placing the cushion on the tool, controls a plate actuator cylinder (62) to lower and raise a compression plate (58) to force air from an interior of the cushion, controls a ram actuator cylinder (90) to lower a ram (14) to pierce the cushion with a plurality of hollow needles (44) attached to a plenum chamber, controls a heater (38) to heat compressed air and eject the hot air from the needles into the cushion to elevate the temperature of the cushion and melt the adhesive, and lowers and raises the compression plate to force hot air from the interior of the cushion to cure the adhesive and bond the cover to the cushion. Then the ram (14) is raised to extract the needles (44) from the cushion (10) as the compression plate (58) is maintained in place to hold the cushion and the cover (22) against the tool (18).
摘要:
A method of fabricating a composite joint from a first cured composite component (13) and a second cured composite component (14), the first and second cured composite components (13, 14) comprising fibre elements embedded in a thermoset resin matrix; the method comprising the steps of: providing an adhesive (15) on at least one of the first and/or second composite components (13, 14); forming a joint region between the first and second composite component by bringing the first and second composite component into contact with each other with the adhesive (15) therebetween; applying a force to the joint region (16, 17); and heating the first composite component in the joint region to a temperature above the glass transition temperature of the thermoset resin matrix of the first composite component.
摘要:
A conduit (100) comprising a plurality of conduit segments (112A-112C) each having a body (120A-120C) and a segment lining (136A-136C) made of a lining material. Each body includes a joint face (132A-132C) having secured thereto a portion (140A-140C) of the corresponding segment lining. A monolithic lining (108) is formed from the segment linings by abutting the conduit segments with one another so that the joint faces face one another and the portions of the segment linings contact one another. The portions of the lining on the joint faces are heated to a temperature above the melting point of the lining material so that they fuse with one another so as to form a fusion (148A, 148B) located between the joint faces.
摘要:
Apparatus (10) for welding plastic workpieces (W1, W2) together includes a heater block (14) having first and second surfaces (64, 66); a first heating element (20) for radiating heat from the first surface (64); and a second heating element (22) for radiating heat from the second surface (66); wherein the first and second heating elements (20, 22) being separately controlled for temperature. The temperature sensors (36, 38) are provided for detecting temperature of the workpieces (W1, W2) at the weld sites. The heating elements (20, 22) preferably are laid out in a non-planar manner such has a parabolic, convex or other curved or angled configuration so as to focus, direct or otherwise concentrate the radiated heat toward the weld site (112) on the workpiece (W). The invention is particularly suited for welding a part made of a melt processable material such as PFA to a part made of a non-melt processable material such as modified PTFE.
摘要:
A method of joining polyolefin articles by fusion bonding, in which the surfaces of the articles are raised to the fusion temperature in a time of less than one minute, and in which there is interposed between the surfaces to be joined a polyolefin film of a thickness less than 50 microns.
摘要:
An exterior body panel assembly having a Class A painted surface, mold-in color or non-Class A surface, and process of infrared welding components of the assembly. Panels of the assembly are placed on a nesting structure and the inside half of the structures are brought together with the other for a fit check. Panels are separated and an infrared heating fixture then heats the various areas to be heated on the panels. The areas on the panels are heated depending on the thicknesses of the parts at each area and surface geometries to be welded. The parts are immediately clamped back together under pressure for joining and cooling of the joined surfaces in the clamped arrangement.