Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren Vorrichtung zur Herstellung einer stoffschlüssigen oder stoff- und formschlüssigen oder zum Trennen einer solchen Verbindung mindestens eines metallischen oder keramischen Bauelements (1) und eines aus oder mit einem thermoplastischen Polymer gebildeten Bauelements (2), bei der die miteinander zu fügenden Bauelemente (1, 2) mit einer einen Gegenhalter (4) und ein Druckstempel (3) aufweisenden Presseinrichtung zusammenpressbar sind. Am Druckstempel (3) und/oder dem Gegenhalter (4) ist eine Heizeinrichtung (6) vorhanden oder sie wirkt dort. Mit der Heizeinrichtung (6) ist eine Erwärmung des mindestens einen metallischen oder keramischen Bauelements (1) bis oberhalb der Erweichungstemperatur des aus oder mit Polymer gebildeten Bauelements (2) erreichbar; wobei die Heizeinrichtung (6) mit mindestens einem elektrischen Widerstandsheizelement, das von einer elektrisch isolierenden, bevorzugt keramischen Schutzschicht überdeckt ist, und/oder mit mindestens einem Laserstrahl, der auf das/die metallische Bauelement(e) (1) innerhalb des Fügebereiches gerichtet ist, und/oder mit mindestens einem am Druckstempel (3) und/oder dem Gegenhalter (4) vorhanden Induktor zur induktiven Erwärmung des/der metallischen Bauelemente(s) (1) gebildet ist.
Abstract:
The invention relates to ultrasonic welding of industrial fabrics. Specifically, the invention relates to methods for ultrasonically welding the seam area of industrial fabrics using a textured horn (20) and/or anvil (30). The fabric edges are overlapped as woven or one or both edges can have some warp or weft yams raveled out. The method involves ultrasonically bonding the overlapped fabric edges, reducing the caliper of the two stacked edges to match the body caliper of the fabric itself. The bonded area can then be perforated using laser or other mechanical means to produce a seam having the same woven texture and permeability (air and/or water) as the body of the fabric.
Abstract:
The present disclosure relates to methods and apparatuses for mechanically bonding substrates together. The apparatuses may include a pattern roll including a pattern element protruding radially outward. The pattern element includes a pattern surface and includes one or more channels adjacent the pattern surface. The pattern roll may be positioned adjacent an anvil roll to define a nip between the pattern surface and the anvil roll, wherein the pattern roll is biased toward the anvil roll to define a nip pressure between pattern surface and the anvil roll. As substrates advance between the pattern roll and anvil roll, the substrates are compressed between the anvil roll and the pattern surface to form a discrete bond region between the first and second substrates. As such, during the bonding process, some yielded substrate material flows from under the pattern surface and into the channel to form a channel grommet region.
Abstract:
The present invention relates to apparatus and methods for thermally treating webs which comprise thermoplastic respectively meltable compounds, thereby creating cylindrical or elliptic consolidation regions which may optionally comprise an aperture by employing a thermal energy source, such as ultrasonic energy, as well as to webs comprising elliptic consolidation regions. In a particular aspect the invention concerns apparatus and methods for creating the consolidation regions by using an anvil with a flexible elongated member, such as a wire, a chain or a tubular anvil with circumferential ribs.
Abstract:
The method for welding profiled elements in plastic material, in particular PVC, comprises the steps of: preparing two profiled elements (3; 3a, 3b; 60, 61), arranged with respective zones to be welded (4; 62, 63) facing one another; making a groove (19) in correspondence to at least one zone to be welded (4; 62, 63) of the profiled elements (3; 3a, 3b; 60, 61), the step of making the groove (19) being performed by means of a removal operation on a peripheral edge of at least one profiled element (3; 3a, 3b; 60, 61); heating the zones to be welded (4; 62, 63); coupling the zones to be welded (4; 62, 63) to one another, pressing the profiled elements (3; 3a, 3b; 60, 61) one against the other so as to keep the zones to be welded (4; 62, 63) in reciprocal contact; the step of coupling the zones to be welded (4; 62, 63) comprising: a sub-step of melting the zones to be welded (4; 62, 63) into one another in order to define a welding bead; a sub-step of making a containing compartment (19a) defined by the groove (19), the welding bead being made internally of the containing compartment (19a); and the step of arranging a containing presser (27) in correspondence to the containing compartment (19a) for preventing exit of the welding bead from the compartment itself.
Abstract:
A seam joining together at least two web materials in an overlapped manner by ultrasonic welding, heat bonding or the like, in a bonding pattern (4) comprising a first bonding pattern (5) and at least one second bonding pattern (6) extending in longitudinal direction along and adjacent at least one side edge (1a, 2a) of the overlapped portion. The bonded area of the second bonding pattern (6) occupies more than 30 % of the combined bonded area of the first and second bonding patterns. The bonding elements (5a) of the first bonding pattern (5) have a mean area that is at least 2 times the mean area of the bonding elements (6a) of the second bonding pattern (6). The contact area of the bonding pattern (4), as seen in transverse direction of the seam, is between 10 and 30% of the width (w) of the bonding pattern (4) at any given point along the length of the bonding pattern.