A method for assembling a box structure includes elementary parts assembled along an understructure of stiffeners and skins. The understructure and skins are made of composite material with a polymer matrix. The method includes sizing the box structure for the loads to which it is subjected and for a glued assembly. A map of the loads on the structure is obtained and a first load limit is defined depending on the probability of the structure being damaged. The understructure and the skins are assembled by gluing them. An additional layer is applied that covers the assembled elementary parts to areas of the assembled box structure where the first load limit is reached.

A method is provided for assembling a stack-up including a first workpiece with a clearance hole and a second workpiece. The method comprises adhering an adhesive to a first face of the first workpiece so as to completely cover and close the clearance hole and securing the second workpiece to a second face of the first workpiece with an adhesive. A stack-up and the method of capturing adhesive squeeze-out during a stack-up assembly process are also disclosed.

A synthetic turf seam integration template system and method is provided that includes a template having a planar base with a positioner. The planar base is configured with a longitudinal cutting edge with a predetermined curvature and an opposing longitudinal non-cutting edge. The positioner, which aids in moving the template, is attached perpendicularly. Variations of the predetermined curvature patterns are disclosed. An optional connector allows connection of two templates to create a longer template for usage on longer seams. Also disclosed are methods of using the seam integration tool in creating an undetectable seam in synthetic turf.

A method for surface preparation of composite substrates prior to adhesive bonding. A curable surface treatment layer is applied onto a curable, resin-based composite substrate, followed by co-curing. After co-curing, the composite substrate is fully cured but the surface treatment layer remains partially cured. The surface treatment layer may be a resin film or a removal peel ply composed of resin-impregnated fabric. After surface preparation, the composite substrate is provided with a chemically-active, bondable surface that can be adhesively bonded to another composite substrate to form a covalently-bonded structure.

Proposed is lower rollers of a hot air welder, and more particularly, to a lower roller structure of a hot air welder, which includes a first lower roller unit installed on a worktable to be pivoted vertically and a second lower roller unit installed on a main body to be slidably moved in front and rear, such that a welding operation of flat fabric and a welding operation of a cylindrical shape can be performed in a single hot air welder through alternate use of the first and second lower roller units.

A method protects a field joint of a pipeline, where chamfered edges of thermally-insulating parent coatings on conjoined pipe lengths are in mutual opposition about a longitudinally-extending gap. The method includes manufacturing an hourglass-shaped inner layer around the pipe lengths, which layer may be moulded. The inner layer extends longitudinally along the gap between the chamfered edges and at least partially overlies the chamfered edges. A thermally-insulating solid insert is assembled from two or more parts to lie in the gap surrounding the inner layer, and pressure is applied radially inwardly from the insert to the inner layer. An outer layer of molten material is manufactured around the insert to form a watertight barrier and to form one or more melted interfaces with the inner layer. Corresponding field joint arrangements are also disclosed.

A composite structure (1) for an aircraft, having at least one insert (2) for receiving attachment devices, each insert (2) includes a core (3) having a major dimension and containing at least one through-hole (4), and a composite strip arrangement formed by a first section (5) surrounding the core (3) and attached to said core (3) by an adhesive polymeric layer, and a second section (6) including at least one free end (6a). The first (5) and the second portion (6) of the composite strip arrangement are disposed over a first surface (1a) of the composite structure (1), such that the major dimension of the core (3) is positioned transversal to said first surface (1 a). The at least one insert (2) is co-cured with the composite structure (1).

The present invention provides a movable load bearing structure with a surface that includes antimicrobial agents capable of eliminating, preventing, retarding or minimizing the growth of microbes and also minimizing cross-contamination when the load bearing structure is being reused for cargos that differ from a previously transported cargo, for example, different food types, such as poultry, fresh vegetables, and fresh fruit. The load bearing structure may be a dunnage platform or a container for storing and/or shipping cargo.

An underwater pipe assembly includes first and second pipes each of which has opposite inner and outer circumferential surfaces and an annular end face. An inner coil surrounds the inner circumferential surfaces of the first and second pipes at a junction therebetween. An annular inner cover layer covers the inner coil. An outer coil is sleeved on the outer circumferential surfaces of the first and second pipes at a position corresponding to the inner coil. An annular outer cover layer covers the outer coil. When the inner and outer coils are energized, the end faces of the first and second pipes are melted to fuse together the pipes, and the inner and outer cover layers are melted to radially fuse with the pipes.

A porous body belt includes a body to be connected including a porous body, a connecting material A that bonds end portions of the body to be connected to each other, and a welding material A which is disposed between the body to be connected and the connecting material A, penetrates at least a part of a void portion of the porous body of the body to be connected, and adheres the body to be connected and the connecting material A to each other.