摘要:
A method and apparatus for constructing a tubular assembly 40 comprising an inner portion (24) and a further portion (23) surrounding the inner portion. The inner portion (24) comprises reinforcement (37) and the further portion (23) being formed from a strip (50) of material comprising two opposed longitudinal marginal side portions (53). The apparatus comprises an assembly station (220) comprising a wall (253). The apparatus comprises means for advancing the inner portion (21) along a first path (231) extending passed the wall (253), and means for advancing the strip (50) along a second path (232) and causing the strip to encircle the wall (253) and thereby wrap about and surround the inner portion (21). The apparatus further comprises means (321) for introducing resinous binder into the reinforcement (37) as the strip (50) is being wrapped about the inner portion (21).
摘要:
A method of manufacturing a liner for reinforcing a pipe includes providing a continuous first reinforcing fibers extending in a first direction, moving the first reinforcing fibers in a machine direction such that the first direction is parallel to the machine direction, providing sheets of a material having second reinforcing fibers extending in a second direction, placing the sheets onto the moving first reinforcing fibers such that the second direction is substantially perpendicular to the first direction, and folding the sheets into a closed shape.
摘要:
Disclosed is a method for producing a profiled semi-finished plastic product from flexible web material, including: providing a plurality of webs of flexible material, —continuously and simultaneously feeding the webs of material to and along a plurality of shaping pieces arranged next to each other, folding each web of material around a respective shaping piece to form a body and an edge strip which projects transversely with respect to the body,—causing the edge strips of different webs of material to at least partly cover each other, impregnating the webs of flexible material provided or the assembly of webs of material with folded-over edge strips covering each other with a hardenable unit, causing the hardenable unit to harden to form the profiled semi-finished plastic product, wherein open spaces remain between two neighbouring bodies and edge strips.
摘要:
An elongate hollow structure and method of constructing the hollow structure is described, whereby the hollow structure includes a radially inner portion and a radially outer portion adapted to be merged together to form a tubular wall structure. The method includes providing the radially inner portion, providing the radially outer portion about the radially inner portion, wherein a space exists between the radially inner and outer portions, the space containing a gas therein, and expanding the inner portion. The gas within the space between the inner and outer portions is arranged to be expelled as the inner portion is expanded.
摘要:
A tubular liner for pipelines includes an inner tubular film and a fiber material layer located on the film and impregnated with a reactive resin curable under UV light. The film contains a styrene-proof and thermally weldable carrier material having a laminated non-woven layer on its outer side facing the fiber material. The carrier material includes an overlapping region along the film. Edge sections of the carrier material are thermally welded together in the overlapping region. The non-woven layer on the outer side of the radially inner lower edge section in the overlapping region is thermally welded to the carrier material on the lower side of the radially outer upper edge section, and the radially outer upper edge section in the overlapping region has a structure on its outer side enabling a durable adhesion of reactive resin. A method for manufacturing the tubular liner is provided.
摘要:
A method for manufacturing high speed pressure compensator-type drip irrigation tubes and the tubes obtained thereby having absolute radial orientation of molecular chains, the orientation imparting strength as well as flexibility to the tube material. The said method comprises extruding a tube using a plurality of extruders; blowing up the extruded tube by introducing a pressure inside the tube relatively higher than the pressure outside the tube; drawing the blown tube simultaneously to the blowing of tube; flattening the blown tube by heat welding the collapsed halves together and forming a tape immediately, subsequent to the process of blowing and drawing the tube; extrusion of a bonding polymer on one border of the tape; printing flow channels into the hot and viscous bonding polymer; and forming a tube by lengthwise folding the tape and heat welding the overlapping borders together using the bonding polymer.
摘要:
A packaging and filling machine that is capable of easily preforming with the forming flaps by keeping the pressure of the filled liquid food in the tube at positive pressure, capable of preventing the pressure of the liquid food from dropping to negative pressure, even if the pressure of the liquid food decreases due to the change in the liquid food pressure, and capable of preventing outside atmosphere materials from invading into the tube.A pressure flange fixed on a periphery of the filling pipe absorbs fluctuation of the pressure of the liquid food in the tube below the pressure flange, and prevents the liquid food pressure from dropping to negative pressure to keep the pressure of the liquid food in the tube below the pressure flange at a positive pressure.
摘要:
A resin impregnated cured in place liner with an integral inner impermeable layer, a method for its manufacture and an apparatus to do this are provided. The liner is formed from a resin impregnable material having an impermeable layer bonded to one surface. The material is formed into tubular shape with the impermeable layer on the outside of the tube about a tubular forming member and continuously everted into the tubular forming device to place the impermeable layer on the inside. An outer impermeable film is placed about the inner tubular layer and may be impregnated with vacuum in the usual manner. Alternatively, the tubular resin impregnable material may be passed through a resin tank and impregnated with a curable resin prior to being wrapped with an outer impermeable layer. The impregnated liner is then suitable for pull-in-and-inflate which can be by steam in view of the integral inner impermeable layer of the liner.
摘要:
In order to further develop a method for producing tubular films that can be applied to an article as well as an apparatus for performing such a method, so that the complexity of production management aspects during production of tubular films is minimized and at the same time there is little material waste, the following arrangement is suggested: at least one pre-folding station for upwardly folding each of the two lateral regions of the film web along a respective bending edge that extends in the direction of travel of the film web; at least one flattening station for largely symmetrically pressing the two upwardly folded lateral regions on the central region of the film web; and, at least one welding station for forming the tubular film by means of welding the respective lateral region, in particular near the respective lateral edge, and the part of the central region spatially associated with the respective lateral region.
摘要:
There is disclosed a pipe member rolled up as a coil and roll-formed, the pipe member made of material having a spring-back characteristics and having a specific residual stress distribution existing along a direction perpendicular to the rolling-up direction of said pipe member, the specific residual stress distribution being formed by being wounded around a longitudinal direction thereof by roll-forming, and when the member is unfurled out, two longitudinal edge portions of the member being overlapped to each other thus forming a pipe shape.