摘要:
An inspection system and method for scanning and recording defects in the surface of the smooth inner wall of dual wall corrugated plastic pipe during manufacture utilizing automated laser technology, in order to minimize potential disruptions in the manufacturing extrusion process and alleviate concerns as to improper formation of the inner wall. The inspection system includes conical laser pattern generator that passes through the dual wall corrugated pipe during the manufacturing process to complete 360 degree scan coverage of the surface of the inner smooth wall of the pipe. The inspection system further includes a set of cameras properly aligned to record comprehensive three dimensional coverage of the scanned image of the inner wall of the dual wall corrugated pipe. This inspection system and method has particular benefits in the manufacture of coilable dual wall corrugated plastic pipe, where the material make-up of the polymer melt used for the inner wall has been altered.
摘要:
A mold is provided for forming a continuously-extruded parison into a corrugated pipe. The mold includes a mold housing having a plurality of bores, a mold cavity having a plurality of annular corrugations, and a plurality of punches. Each punch is disposed in one of the bores and aligned with one of the annular corrugations of the mold cavity. Each punch is also configured to form an aperture in a corrugation of a corrugated pipe in the mold. A continuous extrusion blow molding system and a method are also provided for forming a hollow plastic product and punching a continuously-extruded, blow molded product before it is released from a mold.
摘要:
A method and an apparatus for producing an endless double-walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage (10) having sections with a corrugated molding surface and a smooth cylindrical sleeve molding surface. To shape the sleeve section, the outer tube is extruded into the sleeve molding surface and is brought into contact with the sleeve molding surface. The inner tube (Si) is then extruded into the outer tube (Sa), already in contact over the entire axial length of the sleeve molding surface, and is brought in the process into contact with the inner side of said outer tube (Sa) that is in contact.
摘要:
A method for coupling corrugated pipe segments is disclosed. The method includes providing first and second thermoplastic corrugated pipe segments arranged to form a fluid flow path and aligning ends of the pipe segments adjacent one another to form a joint. The method further includes providing a coupling assembly having a thermoplastic sheet with a flexible weld rod of a thermoplastic material attached thereto and circumferentially contacting the coupling assembly with the first and second thermoplastic pipe segments. An electrical current is applied to the weld rod to cause the weld rod, sheet and pipe segments to fuse to one another and form a circumferential weld seam on each side of the joint.
摘要:
Medical devices including a proximal tubular member, a distal tubular member, and an intermediate tubular member connecting the proximal tubular member to the distal tubular member, and related methods.
摘要:
An apparatus for fabricating a bellows type hose and a fabricating method thereof, which can improve a bellows type hose for use in a vacuum cleaner or the like in quality. The apparatus includes a power generating unit, an outer mold having at least one folds-forming gear disposed to rotate while revolving around a hollow-cylindrical basic material conveyed from an injection molding unit and thus to form folds on the hollow-cylindrical basic material, the at least one folds-forming gear having a waved folds-forming part formed on an outer circumferential surface thereof, and a power transmitting unit to transmit a power of the power generating unit to the at least one folds-forming gear of the outer mold.
摘要:
A pipe molding apparatus for forming double walled plastic pipe comprises an extruder which feeds first and second parisons of flowing plastic material to a moving mold tunnel to make respectively the outer and inner walls of the pipe. The moving mold tunnel includes a cooling plug over which the second parison moves to form the inner pipe wall while the outer wall of the pipe is formed against the interior surface of the mold tunnel. An air assist is provided internally of and helps to move the inner parison onto the cooling plug.
摘要:
A method and apparatus for fusing a bell connector to the end of a corrugated thermoplastic pipe are disclosed in which an expandable mandrel grips a preformed bell and a pipe support grips a pipe co-axial with the longitudinal axis of the bell. A pipe trimmer for facing the pipe end may be moved into and out of the axis of the pipe if necessary for trimming the pipe end to provide a uniform planar flange face and a heater, combined with a supporting flange, moved sequentially into and out of the axis of the pipe and bell for heating the opposed faces of the trimmed end of the pipe and the end of the bell to a desired fusing temperature. Upon heating of the opposed faces of the bell and the pipe to a predetermined fusing temperature, the said faces of the bell and the pipe are abutted against each other, with the back side of the corrugated pipe flange face fully supported by the supporting flange, i.e. backing ring, at a predetermined pressure for a time sufficient to fuse the bell and pipe together.
摘要:
An apparatus for the manufacture of pipes of thermoplastic plastics having transverse profile features comprises mold segment halves guided by twos to circulate on a molding path. A conveying device is provided for the recirculation of the mold segment halves, working in the way of a gantry crane. On a conveying bridge overlapping the molding path, two conveying carriages are provided, which are displaceable in directions opposite to each other and at right angles to the direction of production and to each of which is attached a conveying arm directed downwards and having a holding device for a mold segment half.
摘要:
A travelling mold tunnel for forming double walled corrugated tube has a first portion for forming corrugated tube and a second belled portion for forming a cuff portion suitable for coupling with another tube. At the upstream end of the belled portion, radial small diameter passages are provided so that a pressure differential may be set up between the inside and the outside of a first parison within the belled portion. Thus, vacuum may be applied through the radial passages to allow an inner parison to laminate with the first parison over its inner surface in the belled portion. The first parison is drawn into the passages in protruding balloons. These may be ruptured. Alternatively, positive pressure may be used. In this case, the balloons may be ruptured inwardly.