A method of providing a post includes providing an inner member, and providing an outer tubular layer of polymer or plastic around the inner member, the outer tubular layer including an outer surface having a surface roughness Ra of at least 3 m. A post is also provided.

Methods and structures are disclosed. An example method includes: rotating a tubular mandrel about a longitudinal axis of the tubular mandrel; depositing a composite material on an inner surface of the tubular mandrel to form a composite tubular member on the inner surface of the tubular mandrel; inserting and expanding an inner expandable mandrel within the composite tubular member to cause the inner expandable mandrel to press the composite tubular member against the inner surface of the tubular mandrel; curing the composite tubular member; removing the inner expandable mandrel; placing a frame within the composite tubular member; and removing the tubular mandrel so as to obtain the composite tubular member with the frame placed therein.

The method for forming from a round shaped cylinder to a square shaped cylinder or flat sheet which can be inserted in a square or rectangular shape metal pipe includes initiating turning of a heated mandrel, extruding heated polymer, wrapping while compressing a first layer of heated polymer or mesh, disposing a mesh or polymer layer over the cylinder encapsulating the cylinder on the turning mandrel while simultaneously laying a second layer of heated polymer over the turning mandrel and compressing the layer of heated polymer into the mesh layer and the mesh layer into the first layer of heated polymer simultaneously, and repeating the layering of the heated polymer and mesh layer until a desired wall thickness is reached.

A filament winding device includes a supporter configured to support a liner in a rotatable manner; a yarn supplying unit configured to support bobbins; a helical winding head configured to helical-wind a fiber bundles onto the liner; and a standard thread guiding mechanism configured to form a standard thread guide channel that guides a standard thread from the bobbins to the liner, the standard thread being different from the fiber bundles and being connected to leading ends of the fiber bundles, the standard thread guiding mechanism including nozzles configured to blow the standard thread with a compressed gas, and guide tubes configured to guide the standard thread blown by the nozzles, and the nozzles and the guide tubes being disposed along a fiber bundle guide channel, and capable of taking up the standard thread from the standard thread guide channel to the fiber bundle guide channel.

A reinforced thermoplastic product may include a main body and a fabric reinforcing sheet that is disposed within a wall of the main body. The wall of the main body may be formed of or from a cast thermoplastic material and the fabric reinforcing sheet may extend circumferentially around the main body in order to reinforce the wall. The fabric reinforcing sheet may include a plurality of fiber bundles and a thermoplastic material that impregnates each fiber bundle.

Methods and structures are disclosed. An example method includes: rotating a tubular mandrel about a longitudinal axis of the tubular mandrel; depositing a composite material on an inner surface of the tubular mandrel to form a composite tubular member on the inner surface of the tubular mandrel; inserting and expanding an inner expandable mandrel within the composite tubular member to cause the inner expandable mandrel to press the composite tubular member against the inner surface of the tubular mandrel; curing the composite tubular member; removing the inner expandable mandrel; placing a frame within the composite tubular member; and removing the tubular mandrel so as to obtain the composite tubular member with the frame placed therein.

A wiring incorporated resin pipe includes a tubular shaped sheet formed in an approximately tubular shape at an interval so that a slit is formed between both ends in a transverse direction, a wiring unit arranged in the tubular shaped sheet along a longitudinal direction of the slit in an inner side of the slit and a resin material filled in a gap formed by matching surfaces of the slit of the tubular shaped sheet and the wiring unit to thereby seal the matching surfaces of the slit of the tubular shape sheet, in which conductive wires for wiring are laid inside the wiring unit in the longitudinal direction.

Method of forming a fiber-reinforced composite by applying multiple layers of prepreg material at the same time such that the proportion of unidirectional fibers which are orientated in the performing direction are greater than the proportion of unidirectional fibers which are obliquely orientated relative to said performing direction. This method controls the presence of overlaps, non-overlaps or gaps between the adjacent turns of the winding, thus improving the quality of the tube. This method also permits a reduction of the manufacturing costs. This method further enables production of tubes in a continuous way with different mandrels arranged to follow each other in a sequence which lead to an improvement of the production rate.

A pipe lining apparatus having a pressure sensitive adhesive backed reinforcement filament that is helically wound onto the inner surface of a pipe or pipe lining by an inverted filament winding apparatus, the apparatus having multiple spools and applicator arms to retain and apply the filament. The applicator arms may be aligned circumferentially or axially.

A pipe lining apparatus having a pressure sensitive adhesive backed reinforcement filament that is helically wound onto the inner surface of a pipe or pipe lining by an inverted filament winding apparatus, the apparatus having multiple spools and applicator arms to retain and apply the filament. The applicator arms may be aligned circumferentially or axially.