Abstract:
A device for producing tubes for packaging tubes, comprising an elongated mandrel (3), around which a substrate web can be formed in order to produce a tubular form (4) that surrounds the mandrel (3) and can be conveyed along the mandrel (3) in a conveying direction (R), as well as welding means (9) for welding the substrate web along a welding region in order to produce a welding seam (11) and at least one first welding belt (34) that can be conveyed together with the tubular form (4) and fixes the tubular form in a contact region of the substrate web with itself by clamping the substrate web between the first welding belt (34) and a clamping partner, wherein means (13) are provided for expanding the tubular form (4) fixed by the first welding belt (34) and the clamping partner by plastically elongating the substrate web in the circumferential direction, wherein said means can be adjusted into a position, in which they radially protrude over the outer surface (14) of the mandrel section (31) of the mandrel (3) that is arranged upstream of the means (13) referred to the conveying direction (R).
Abstract:
A method of manufacturing a composite core can include: wrapping a mandrel in a mandrel wrapping process by securing a mandrel with a winding jig; orienting the composite material at a wrap angle to the mandrel; and depositing the composite material around a circumference of the mandrel. The method can further include assembling the wrapped mandrels in a tool and applying a pressure to the composite material during a curing cycle.
Abstract:
A method of forming a hollow composite construction member of the type suitable for use as building material includes providing an elongated inflatable mold assembly having a longitudinal axis. The mold assembly further has a flexible, substantially tubular bladder wall defining an elongated inflatable cavity, wherein the cavity is movable between a deflated condition, an inflated condition, and a plurality of partially inflated conditions. A reinforcing fabric is positioned concentrically around the flexible bladder wall. A flexible air-impervious outer layer is positioned concentrically around the fabric, with the bladder wall and the outer layer defining an elongated annular space. The fabric is positioned within the space. An intermediate member is inserted within the elongated annular space between the reinforcing fabric and the tubular bladder. A fluid is introduced into the cavity to at least partially inflate the mold and shape the fabric. The mold assembly is bent along the longitudinal axis to a curved shape. The elongated annular space is infused with a rigidification material such that the fabric is permeated with the rigidification material. The rigidification material is hardened to form a rigid hollow composite construction member.
Abstract:
New compositions and methods of using those compositions as bonding compositions are provided. The compositions comprise a cycloolefin copolymer dispersed or dissolved in a solvent system, and can be used to bond an active wafer to a carrier wafer or substrate to assist in protecting the active wafer and its active sites during subsequent processing and handling. The compositions form bonding layers that are chemically and thermally resistant, but that can also be softened or dissolved to allow the wafers to slide or be pulled apart at the appropriate stage in the fabrication process.
Abstract:
A fiber placement system is described. The system includes a motion system having a robotic arm, a fiber-placement layup mandrel mounted on the robotic arm, and a fiber-placement delivery system having a delivery head. The robotic arm is operable for movement of the mandrel with respect to and proximate the delivery head for fabrication of a composite fiber part.
Abstract:
If a plurality of part film webs are each stored on different supply shafts, considerable effort is necessary to use a plurality of part film webs within one apparatus. If the part film webs are stored as a plurality of part film webs on a common supply shaft, various problems can arise. Preferably a plurality of part film webs can be used in an apparatus for the transfer of a transfer layer to a sheet. Ideally, the supply shaft and/or collecting shaft is/are constructed as a friction shaft, so that the transfer of the rotational movement of the friction shaft to the transfer film supply roll and/or transfer film collecting roll is carried out via a frictional connection between shaft and roll, which can be overcome by tensile forces of the transfer film web. Therefore, a plurality of transfer film rolls having different diameters are provided on the friction shaft.
Abstract:
By completing curing in a short period of time even at low temperatures and using an epoxy resin composition as a matrix resin of a prepreg, it is possible to obtain a fiber-reinforced composite plastic product such as a fiber-reinforced tubular composite with excellent mechanical properties and, more particularly, excellent impact resistance. The epoxy resin composition includes A component, B component, C component, D component and E component, where the content rate of sulfur atoms is equal to or more than 0.2 wt % and equal to or less than 7 wt %, and the content rate of the C component is equal to or more than 1 wt % and equal to or less than 15 wt %. A component: epoxy resins, B component: reactive products of the epoxy resins and an amine compounds including the sulfur atom in a molecule (the unreacted epoxy resins and/or the amine compounds may be included), C component: polyamide compounds soluble in the A component, D component: urea compounds, and E component: dicyandiamide.
Abstract:
A microchip with capillaries and method for making same is described. A sacrificial material fills microchannels formed in a polymeric substrate, the filled microchannels are covered by a top cover to form filed capillaries, and the sacrificial material is removed to form the microcapillaries. The sacrificial material fills the microchannels as a liquid whereupon it becomes solid in the microchannels, and is liquefied after the top cover is applied and affixed to remove the sacrificial material. The top cover may be solvent sealed on the substrate and of the same or different material as the substrate. The top cover may also be an in situ applied semipermeable membrane.
Abstract:
Apparatus and methods are provided for making one or more tubular components of medical catheters or other tubular bodies using a strip of polymer material including a length, a width, and a first surface including a lubricious or other coating or surface modification. The strip is directed adjacent an elongate mandrel, such as beading, such that the length of the strip extends along the mandrel and the coating is disposed towards the mandrel. The strip is rolled at least partially around the mandrel such that the coating or surface modification is disposed inwardly towards the mandrel, and one or more strip-constrainment members are wrapped around the rolled strip. The directing, rolling, and wrapping steps may be substantially continuous to create one or more strip-mandrel-constrainment member subassemblies.
Abstract:
To generate course head assignments for a multihead composite material application machine having a set of heads, a set of paths for a ply for a composite part is received and it is determined whether each path of the set of paths complies with a head characteristic for the set of heads. In addition, a special head of the set of heads is assigned to a non-standard path of the set of paths in response to determining the non-standard path does not comply with the head characteristic and ones of the set of heads are assigned to corresponding ones of the set of paths in response to the ones of the set of paths being in compliance with the head characteristics. Furthermore, a constellation of head locations is calculated in response to the set of paths being in compliance with the head characteristic and the set of heads are assigned to the constellation of head locations in response to calculating the constellation of head locations.