摘要:
For simply and surely manufacturing a double wall corrugated pipe, there is provided a method for manufacturing a double wall corrugated pipe having a slot part 3 on one end, a socket part 2b on the other end, an external wall 6 of a continuous irregular shape, and an inner wall 7 of a tubular shape by subjecting a thermoplastic resin to extrusion molding, comprising at least: a first cutting step in which a double-wall continuous tubular body 1a to be extrusion molded in a state of which the socket part 2b (2a) and the slot part are being coupled together is cut off at an external wall part X corresponding to the end portion of the socket part 2b and at an external wall part Y corresponding to the end of the slot part 3; and a second cutting step in which a cutting unit is inserted to a predetermined position from a socket part 2a side opening to an internal cavity portion 9 of the double wall single tubular body 1b obtained in the first cutting step, and the inner wall 7 is cut off in a circumferential direction while a cutter Cz protruded from the cutting unit U is brought into contact with an inner wall part Z from which the socket part 2a is started.
摘要:
For simply and surely manufacturing a double wall corrugated pipe having a socked part of a predetermined shape without any deformation, in a method for manufacturing a double wall corrugated pipe 1 having a slot part 3 on one end and a socket part 2a on the other hand, an external wall 11 (21, 31) of a continuous irregular circular shape, and an inner wall 12 (22) of a cylindrical shape by subjecting a thermoplastic resin to extrusion molding, before the double wall corrugated pipe 1 to be extrusion-molded is cooled off, a pore is formed in an external wall 21 portion of the socket part 2a by piercing with a needle 5 to allow a hollow chamber 23 of the socket part 2a to communicate with the air, so as to be designed to surely prevent shrinkage or deformation of an external wall 21 of the socket part 2b accompanied by a decrease in temperature.
摘要:
It administers a plurality of wireless base stations grouped into a plurality of groups, and performs the processing about the management, control and maintenance of the wireless base stations selectively for each of the groups. This enables the efficient management, control and maintenance processing of the wireless base stations.
摘要:
A polyol for a polyurethane produced by reacting an epoxide with a reaction product obtained by reacting at least four components of (a) a phenol compound having the formula A--OH (A represents an aromatic ring having at least two reactive sites), (b) an aromatic amine having the formula B--NH.sub.2 (B represents an aromatic ring having at least two reactive sites), (c) an aldehyde and (d) an alkanolamine.
摘要:
A base station includes at least one first application section, a determining section, and a controlling section. Each of the first application sections executes one of a plurality of first application programs corresponding to one of a plurality of first application services utilizing a first wireless communication service provided by a mobile virtual network operator. The determining section receives a connection request to connect to the first application service from a first terminal for using the first wireless communication service, and determines the first application section corresponding to the first application service specified in the connection request. The controlling section controls communications between the determined first application section and a server managed by the mobile virtual network operator and between the determined first application section and the first terminal.
摘要:
A radio base station apparatus for performing radio communication with a mobile terminal apparatus, the radio base station apparatus including: a forwarding data determination unit which determines forwarding data which is to be forwarded to a handover destination radio base station apparatus, based on the presence or absence of retransmission of data to the mobile terminal apparatus; and a data forwarding processing unit which forwards the determined forwarding data to the handover destination radio base station apparatus.
摘要:
It administers a plurality of wireless base stations grouped into a plurality of groups, and performs the processing about the management, control and maintenance of the wireless base stations selectively for each of the groups. This enables the efficient management, control and maintenance processing of the wireless base stations.
摘要:
A system and method for monitoring the molten state for enabling a molten state, butting state, or other state of electric-resistance-welded pipe on-line more accurately than in the past are provided. That is, a mirror 23 provided at a front end side inside a container 21 receives light emitted by the welded parts 5 of the tube-shaped steel strip 1 themselves through heat resistant glass 22 from the side direction and reflects the image of the welded parts 5 of the tube-shaped steel strip 1 in the direction of a relay lens 24 provided at a base end side of a relay lens unit 13. The relay lenses 24 relay the image of the welded parts 5 of the tube-shaped steel strip 1 to a conversion lens 12, then the conversion lens 12 forms that image on the imaging area of a CCD camera 11. Therefore, it is possible to capture the welded parts 5 of the tube-shaped steel strip 1 from the side direction by a resolution in accordance with the resolution of the CCD camera 11 and possible to obtain information of the welded parts 5 of the tube-shaped steel strip 1 more accurately than in the past and on-line.
摘要:
An apparatus for producing a corrugated tube contains a roller assembly composed of plural rollers having plural convexed rings, respective convexed rings forming a helix as a whole so as to substantially form a single rotating shaft body, and a synthetic resin supplier for supplying a strip of synthetic resin onto the roller assembly. The pitches between the convexed rings, and the diameters and the widths of the convexed rings are so constructed as to be gradually decreased in accordance with the contraction percentage of the synthetic resin. The apparatus is provided with a follower ring on a roller valley portion between the convexed rings, the follower ring being rotatable in response to circumferential speed of the apex of the convexed ring.
摘要:
An operation management device performs an operation management for electric resistance welding in which a strip-shaped metal plate is formed to have a cylindrical shape in such a manner that both end portions of the metal plate gradually face each other while the metal plate is conveyed, and a Vee convergence section, which is a portion at which both of the end portions butt against each other while facing each other, is welded. Furthermore, the operation management device includes: a measuring unit that measures a distance L [mm] between a first Vee convergence point at which both of the end portions of the metal plate geometrically come into contact with each other and a second Vee convergence point that is a contact point of both of the end portions of the metal plate, and a Vee convergence angle θ[°] at the first Vee convergence point on the basis of an image of an area including the Vee convergence section; and a determining unit that determines whether or not the distance L [mm] and the Vee convergence angle θ[°] satisfy the following equation (1). Lmin(θ/θst)−0.15≦L≦35 (1)