Abstract:
A machine (10) and a method for producing a tubular product (A), preferably made of paper, which can be preferably used to produce straws starting from one or more strip-shaped elements (B), by means of winding means (17) configured in a closed loop and partly wound around a shaping member (12) on which the one or more strip-shaped elements (B) are wound in a helical manner and by means of support means (20) configured as a support belt (22) disposed in a closed loop, made of flexible material, partly wound on the shaping member (12).
Abstract:
A method for winding can include dereeling a wire from a dereeler onto an object. The method can include rotating the object to wind the wire on the object at an angle offset from perpendicular to a longitudinal axis of the object. The method can include an axis of rotation of the rotating object that is non-collinear with the longitudinal axis of the object. The method can include a winding point on the object that remains orthogonally stationary with respect to the axis of rotation.
Abstract:
A fiber reinforced plastic bolt(FRP) and a method for producing the same are disclosed. The FRP bolt is useful in the industrial areas which require a bolt having electric-insulation, anti-corrosive, thermal-insulation, and non-magnetic properties. The method for producing the FRP bolt includes the steps of: winding a prepreg around a surface of an internal body, wherein the internal body includes a first reinforcing fiber which is unidirectionally aligned along the axis of the bolt, and a synthetic resin which is impregnated into the first reinforcing fiber, and the prepreg includes a second reinforcing fiber and a thermosetting resin which is impregnated into the second reinforcing fiber; forming a fiber reinforced plastic round bar by heat-hardening the prepreg; and forming a screw thread on the surface of the fiber reinforced plastic round bar.
Abstract:
The present invention relates to an inflow cannula for blood circulatory assist devices, having a robust structure and possessing a thrombus anchoring effect. Furthermore, the inflow cannula for blood circulatory assist devices does not deform or exhibit loss of dimensional accuracy during the manufacture process. These features are achieved by a porous structure formed of one or more linear elements or of a porous shaped article.
Abstract:
A method of forming a fibre reinforced thermoplastic composite tube (P) in which reinforcing fibres (10) and thermoplastic resin matrix material (12) are placed around a mandrel (M) to provide a composite tubular pre-form (20) on the mandrel (M) which is then passed through a heated die (30) to compact and reduce the diameter of the pre-form (20) and change the state of matrix, the mandrel (M) with the formed tube (P) thereon exiting the die and the now formed tube (P) is removed from the mandrel, the composite tubular pre-form (20) being produced by winding reinforcement fiber (10) and thermoplastic fiber (11) onto the mandrel, the thermoplastic matrix being caused to flow and then solidify on cooling.
Abstract:
The object of the invention is a method for building hoses reinforced with spirally laid fibres, where the hose under construction (3) undergoes both rotation and advancing motion relative to the laying head (12), and where the reinforcing fibres are unwound from drums (14). The drums (14) are rotated about two axes, the first axis being the principal axis of the drums (A) and the second axis (B) being nearly parallel with the direction in which the fibres are unwound, where the direction of rotation of the drums (14) about the second axis (B) is the same as the direction in which the hose under construction (3) is rotated. The apparatus for carrying out the method comprises a laying head (12) and a drum support platform (15), where the hose under construction (3) undergoes both rotation and advancing motion relative to the laying head (12), and where the reinforcing fibres (10) are unwound from drums (14) through a circular fibre guide (1) The further object of the invention is a method for building hoses reinforced with spirally laid fibres, wherein the reinforcing fibres (10) are laid on the hose surface through a rotating self-adjusting circular fibre guide (2) arranged substantially coaxially with the hose. The invention also relates to an apparatus for carrying out the above method.
Abstract:
A method for affecting effecting a repair and/or strengthening of a pipe is disclosed. The method comprises cleaning an effected affected area of a surface of the pipe to provide a cleaned surface of the pipe surface for an area requiring repair; applying a continuous strip around the pipe from a portion prior to the effected area and allowing the continuous strip to extend to a portion after the effected affected area. The continuous strip forms a spiral sleeve spaced from the pipe surface to provide an annular chamber between the pipe surface and the spiral sleeve.
Abstract:
An apparatus for manufacturing a tubular product, includes a winding station for winding a substrate component and a reinforcement element in a helical path to form a reinforced tubular product, and respective apparatus for feeding the elongate substrate component and the elongate reinforcement element to the winding station. A first severing device cuts the reinforcement element upstream of the winding station, whereupon delivery of the reinforcement element upstream of the cut is withheld for a predetermined time period that results in a segment of the tubular product without the reinforcement element. A second severing device severs the tubular product within the above said segment to provide the predetermined length of the tubular product.
Abstract:
An apparatus for winding steel ribbon around a vessel inner shell having forward and rearward ends to construct a pressure vessel includes a vessel support and rotation mechanism, a vessel elevation adjusting mechanism, tracks for supporting and guiding the vessel support and rotation mechanism, a carriage having rail track engaging mechanism for traveling along the track on at least one side of the vessel inner shell, and a ribbon pulling mechanism mounted on the carriage for delivering the ribbon to the vessel inner shell under ribbon tensile loading to pre-stress the vessel. The apparatus preferably additionally includes a locking mechanism for locking the vessel support and rotation mechanism to the track, after the vessel support and rotation mechanism is positioned at forward and rearward ends of a given vessel inner shell. The vessel support and rotation mechanism preferably includes several vessel support roller sets in the form of annular members rotatably mounted on tracks. A method for winding steel ribbon around a vessel inner shell using the above described apparatus, includes the steps of mounting the vessel inner shell on the vessel support and rotation mechanism, securing an end of the ribbon to the vessel inner shell, rotating the vessel inner shell, delivering the ribbon from the ribbon pulling mechanism to the vessel inner shell for winding around the inner shell, and advancing the ribbon pulling mechanism along the track on the carriage to wind the ribbon along the inner shell in a helical path.
Abstract:
A machine wraps pipe as it travels along a substantially linear path between a feeder reel from which the pipe is unwound to a take up reel onto which the pipe is rewound. A pipe wrap assembly for wrapping one or more layers of tape about the pipe is rotatably mounted on a carriage. A mechanism mounted on the carriage and engaged with the pipe drives the carriage along the pipe as the pipe travels from reel-to-reel. As the carriage is driven along the pipe, the tape is spirally applied to the pipe by the pipe wrap assembly. The carriage is supported for lateral horizontal movement in response to variation in the unwind and rewind points on the feeder and take-up reels. The carriage is also supported for longitudinal horizontal movement in response to changes in the rate of travel of the pipe relative to the rate of travel of the carriage. A drive control mechanism permits variation in the rate of travel of the carriage to compensate for variations in the rate of travel of the pipe between the reels to maintain the carriage in generally constant position as the pipe travels between the feeder and take up reels. The controller may be manually operated in response to visual observations by the operator or may be automatically operated in response to sensor or computer data to determine the longitudinal position of the carriage.