A method of making an aircraft blade is provided. The method comprises the steps of: assembling two or more fibre-reinforced thermoplastic composite parts into a blade assembly; and welding the fibre-reinforced thermoplastic composite parts together utilising an additional thermoplastic located at least at locations where the parts will abut when assembled. The additional thermoplastic has a melting or softening temperature lower than a melting temperature of each of the fibre-reinforced thermoplastic composite parts being assembled. The step of welding comprises heating the blade assembly to a temperature above the melting/softening temperature of the additional thermoplastic and below the melting temperature of each of the fibre-reinforced thermoplastic composite parts so as to melt/soften the additional thermoplastic and thereby weld the fibre-reinforced thermoplastic composite parts together to form the aircraft blade.

A method for manufacturing a welded molding made of liquid crystal polyester as a formation material is provided, the method including: a step of heating each of a first ridge portion of a first member made of the liquid crystal polyester as a formation material and a second ridge portion of a second member made of the liquid crystal polyester as a formation material to a temperature equal to or higher than a flow start temperature of the liquid crystal polyester; and a step of abutting the first ridge portion and the second ridge portion to each other to perform vibration welding while pressing the first ridge portion and the second ridge portion in a direction in which the first ridge portion and the second ridge portion are brought relatively close to each other.

A relatively thick, rubberized adhesive tape is applied to an article to repair, patch, bond, seal, or waterproof the article, to join two or more articles, and/or to modify the appearance and/or physical properties of the article, such as by thermal insulation, shock resistance, vibration resistance, electrical insulation, and the like.

The present disclosure provides a welded body having a connecting structure formed by welding a first molded body and a second molded body, wherein the first and second molded bodies contain at least one copolymer selected from the group consisting of a tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer, and wherein the connecting structure has a liquid contact surface to be in contact with a liquid having a solubility parameter of 14 to 35 (MPa).sup.1/2, a welded part formed in the connecting structure is not exposed to the liquid contact surface, and the number of particles of 30 nm or larger to be eluted from the liquid contact surface in the connecting structure is 1,000 particles/ml or less.

A method for altering polymer properties for the molding of parts comprises exposing, to a scission-causing stressor, a region of a polymer form. The scission-causing stressor is controlled to achieve, in a relatively higher molecular-weight polymer at the region, an amount of scission that results in a reduction in the molecular weight of the relatively higher molecular-weight polymer, thereby forming a relatively lower molecular-weight polymer at the region.

A melting heater configured to melt joining end surfaces of a pair of semi-molded products in a case where the joining end surfaces are melted and joined to manufacture a molded product, the melting heater including: two glass plates arranged in parallel to each other; and a plurality of element heaters arranged in a unit having a flat plate shape as a whole between the two glass plates, in which the glass plate is subjected to surface processing for controlling infrared rays emitted from the plurality of element heaters.

A block assembly for connecting a first section and a second section of a load bearing assembly includes a male fitting and a female fitting. The male fitting includes a male fitting body and a projection extending from the male fitting body. The female fitting includes a female fitting body and defines a fitting cavity extending within an interior of the female fitting body. The male fitting couples with the female fitting by inserting the male fitting body within the fitting cavity and moving the male fitting body toward a base of the female fitting. The projection on the male fitting interacts with an interlocking joint on the female fitting to resist detachment of the male fitting with respect to the female fitting.

A first plastic part is fixtured in a first fixture, and a second plastic part is fixtured in a second fixture for welding to each other. The first plastic part can be independently moved relative to the second plastic part in each of three directions: 1) linearly in a direction parallel with a z-axis, 2) linearly in a direction parallel with an x-axis, and 3) circularly in a circular arc about an axis parallel with a y-axis.

A process for joining two sheeting articles reinforced with unidirectionally aligned endless-fibres by ultrasonic welding, wherein the fibres are embedded in a matrix of polycarbonate and the sheeting articles have abutting ends that are substantially rectangular and substantially even. The process comprises (1) arranging the sheeting articles next to one another end-to-end in the region of the abutting ends in a welding apparatus between a sonotrode and an anvil, (2) welding the sheeting articles by means of ultrasound, wherein the sonotrode and the anvil exert pressure on the to-be-welded sheeting articles in the melting region between the sheeting articles and perpendicularly to the abutting ends of the sheeting articles, and (3) removing the sheeting articles that are welded to one another from the welding apparatus. Also provided is a second process for joining two sheeting articles, a sheeting article, an apparatus, and a multilayer composite.

Herein is described a pressure resistant shell for stabilizing a welding seam of a weldable tubing as well as a method of using it.