Abstract: A cutting process S1 cuts a wire 1 into cut pieces each having a volume approximately equivalent to that of a desired shoe 11. A forging process S2 sequentially forges cut pieces 2 with forging dies 13, 23, and 33 having three cavities 13c, 23d, and 33e respectively, and obtains a steel sphere 8. A finishing process S3 obtains a shoe-shaped material 10 from the steel sphere 8 without a heat treatment, and carries out a heat treatment to the obtained material 10, thereby to obtain a shoe 11 for a compressor.

Abstract: The present invention is directed to a carrier for use with a printer that can support irregularly shaped substrates having a top surface. The carrier includes first and second planar members. The first planar member has top and bottom surfaces, a thickness, and an inner edge that conforms to an irregularly shaped outer edge of a substrate. The second planar member has a top surface that is coupled to the bottom surface of the first planar member. A recess, defined by the inner edge of the first planar member and the top surface of the second planar member, is adapted to receive the substrate such that top surfaces of the substrate and the first planar member are coplanar.

Abstract: A thruster device and associated methods are provided. The thruster device comprises a frustoconical inner layer and a frustoconical outer layer that surrounds the inner layer such that the inner and outer layers cooperate to define a spiral flow passage therebetween. An outlet, such as a nozzle, is attached to an exit end of the thruster device such that the outlet is in fluid communication with the spiral flow passage. In one embodiment, the thruster device includes an end flow cap that is also attached to the exit end and establishes the fluid communication between the spiral flow passage and the outlet. The end flow cap includes at least one channel for directing the propellant from the spiral flow passage to the outlet. The design of the thruster device allows the frustoconical inner and outer layers to be assembled without galling or damaging the spiral flow passage.

Abstract: The present invention provides a rim rolling method in which slotting can be correctly performed at an arbitrary position in the thickness direction of an outer peripheral face of a blank. A preforming roller die 7 is prepared in which a groove 8 is formed in an outer peripheral face 7a in the circumferential direction, and a groove forming blade portion 9 is protruded in the circumferential direction on an inner bottom portion of the groove 8. A preforming process is performed in which the groove 8 and the groove forming blade portion 9 of the preforming roller die 7 are pressed against an outer peripheral portion 10 of a disk-like metal blank 1, to form an outer peripheral groove 11 in the whole outer peripheral portion of the blank 1 by the groove forming blade portion 9.

Abstract: A metal plate (126) has a plurality of openings (127) extending through it, and is cleaned using a wet hydrogen process (157). Glass windows (106) are then placed in the openings, and are each fused to the metal plate by heat (231) in a manner so that each window projects outwardly on each side of the plate. Both sides of each window are then simultaneously ground and polished (232). Exposed surfaces of the metal plate are electroplated with nickel and gold (236). One or more coatings (41, 46, 47) are applied to one or both sides of each window. Several sections are then cut from the assembly, each of which can serve as a lid (17) for an optical apparatus (10).

Abstract: The invention provides a method of manufacturing curveable reinforcement presenting a pattern comprising solid portions and open portions and intended for use in making a reinforced sealing section member, the method comprising: a) extruding a bead or preform of thermoplastic material; and b) calendering the bead or preform of thermoplastic material to impart said pattern thereto.

Abstract: The invention is a brake disk and a method of producing the same. The brake disk has at least one friction ring which can be engaged by a brake shoe on at least one side. The friction ring is divided into at least two ring segments having mutually facing end areas configured to be coupled with one another adjacent a junction and separation area. A separation gap is formed between the mutually facing end areas, which mesh with one another. At least one connection device is positioned in the junction and separation area for coupling the ring segments together.

Abstract: A method of producing a bevel gear, particularly a bevel ring gear, the bevel gear comprising mounting surfaces. The method comprising the steps of flashless warm forging a blank, preferably an annular blank, in a forging die to produce the bevel gear with precision forged teeth; performing a hardening operation on the teeth; and then, without machining, finishing the teeth by lapping the teeth with a mating bevel gear. A die apparatus for use in a press for forging the bevel ring gear from the annular blank is also disclosed.

Abstract: A heatsink of the present invention has a column having a heat conducting plate with a heat receiving face contacting a heat producing element. On the side faces of the column are a plurality of first slits and a plurality of second slits disposed transversely to the plurality of first slits. These slits form a plurality of pillar-type protrusions functioning as fins for cooling. The depths of the first and second slits in the column are different, and this difference in levels are used to cause the fluid for cooling to form a turbulent flow. A cross section of the column tapers off gradually or in stages as the vertical distance increases from the heat receiving face. A cooling apparatus for the present invention includes a cooling means mounted on the heatsink of the present invention. The cooling apparatus for the present invention enjoys a high cooling ability and reduced size.

Abstract: In order to produce precision optic elements using injection molded plastic, a metal mold is fabricated from two positive masters comprising exact metallic reproductions of the desired plastic part and on which a metal shell has been electroformed or otherwise plated. Two positive masters are required for each mold, one being formed to define the upper part of the mold and the other the lower part of the mold. Each positive master is scribed with an axial line and with a cutting line slightly offset from the axial line, the cutting line for the upper part of the mold being below the axial line and the cutting line for the lower part of the mold being above the axial cutting line. The positive masters are then cut along their cutting lines, the metal shells removed, and the portion of the remaining metal shells between their axial lines and their cutting lines is then trimmed. The upper and lower parts of the mold are then combined to define the complete injection mold.

Abstract: An improved method of machining slots and material feed holes in a molding die such as an extrusion die designed to form a honeycomb structure of ceramics employed as a catalyst carrier of a catalytic converter for automotive vehicles. In one of the preferred embodiments, shallow holes are drilled in a die material and subjected to electrochemical machining to remove material from the bottoms of the shallow holes so that they communicate with the material feed holes without any burrs. In the other embodiment, the slots are cut using a rotary cutter in a given order which will balance reaction forces exerted on the cutter from both side walls of each slot to minimize deformation of the cutter during cutting of the slots, thereby preventing the slots from being curved undesirably.

Abstract: A method is provided for forming enlarged cylinder bores in an engine based on a family of internal combustion engines having an original cylinder bore axis for each bore, wherein each cylinder bore is constrained against enlargement toward one side. The method includes providing an offset axis parallel to the original cylinder bore axis and spaced toward an opposite side of the cylinder bore by a dimension equal to one half of a predetermined bore diameter enlargement, and centering the enlarged cylinder bore on the offset axis. The method preserves a minimum wall thickness from the cylinders to camshaft bores between the cylinder banks while the outward enlargement dimension is preferably limited to a value which does not require changing the cylinder head bolt pattern or reduce the wall thickness below minimum values in other portions of the cylinders.

Abstract: A method of manufacturing a face plate for a golf club head is presented to provide face having substantial thickness variation for enhanced performance. The method includes the steps of providing a rolled sheet of metal material having an initial thickness and forming a blank having a prescribed outer shape from the material. The method also includes machining a second side of the blank such that the resulting face plate has a variable thickness. The machining is such that the plate has a first thickness less than or equal to the initial thickness, a second thickness less than the first thickness and a third thickness less than the second thickness. The machining is performed over a substantial portion of the surface area of the second side. Either a CNC lathe or milling machine may be used; however, for an axisymmetric face thickness a CNC lathe is preferred and for an asymmetric face thickness a CNC end mill is preferred. The club head may be a wood-type or iron, and titanium or steel alloys may be used.

Abstract: A fabrication station (117) suitable for use mobile unit (1) or as stand alone unit for fabricating solid surface construction materials is provided, as is a method of use therefor. The fabrication station is equipped with climate control units (23, 23a, 123) fabrication equipment (24, 124) and other environment control equipment. Therefore, solid surface construction materials can be fabricated onsite or at a remote fabrication shop. In the fabrication process according to the present invention, dimensional information is laid out directly onto the solid surface material stock. The fabrication station can include an adjustable support (124a) that supports each slat support channel portion so that the position of the slat support channel portions is adjustable relative to the support wall and one another to provide a fine adjustment. The fabrication station can also include removable slat portions 124c to accommodate different shapes of solid surface material to fabricate.

Abstract: The invention relates to a method for finishing the ball cup of a homocinitic joint, especially for motor vehicles, having a ball ring-shaped bearing surface for the ball cage and a plurality of essentially axial running guideways which interrupt said ball ring-shaped bearing surface. The guideways are provided for the balls which are arranged in the ball recesses of the ball cage and which transmit torque between the ball cup and the ball star. In order to be able to finish such ball shells quickly, economically and as fully automatic as possible, the invention provides that both the ball ring-shaped bearing surface for the ball cage as well as the guideways for the balls are produced by means of a turning machining.

Abstract: The present invention is directed to various methods of forming a heart valve stent. In one embodiment, the method comprises providing a cylinder of material, the cylinder having an outside diameter and an inside diameter, the inside diameter having a first dimension, forming a plurality of stent posts on an end of the cylinder, and increasing the inside diameter of the cylinder of material to a second dimension, the second dimension being greater than the first dimension.

Abstract: A process for producing a groove-like recess which is part of a strip seal between two components which enclose a gap, uses a material-removing process technology to create the groove-like recess in the two components in such a manner that the groove-like recess in each of the two components, after orientation with respect to one another, lie substantially opposite one another in an end position in which they enclose the gap between them, and that a strip element can be introduced into the groove-like recesses in such a manner that the strip element at least partially projects into both groove-like recesses and, under the action of a force, forms a substantially gastight joint with the groove-like recesses in the two components. Furthermore, a groove-like recess of this type is part of a strip seal.

Abstract: Compressor shoe is manufactured by cutting a wire into cut pieces each having a volume approximately equivalent to that of a desired shoe. The cut piece is sequentially forged with forging dies having three cavities. The cut piece is first forged to a cylindrical shape with a small rounded portion, then to a rugby ball shape, and then to a shape corresponding to a shoe shape. A finishing step, including heat treatment, is then carried out to obtain a compressor shoe.

Abstract: The invention relates to a method for producing or machining a work piece in the form of a cylindrical hollow body, especially a container (an outer wall of a container), a barrel or a cask. According to the inventive method, the work piece is held so that the longitudinal axis thereof is oriented vertically and is then machined, especially formed, edged and provided with beads, a bottom and a lid. The method is characterised in that the work piece is moved at the transfer level and is lowered into a working area of a machining device, especially a shaping machine, for machining. The machining device is arranged underneath the transfer level.

Abstract: An axle shaft for a differential assembly. The axle shaft includes a shaft structure and a flange structure. The shaft structure has a coupling portion with an engagement surface. The flange structure is formed in a fine blanking operation and has a mounting aperture with a contact surface. The mounting aperture is sized to receive the coupling portion such that the engagement surface and the contact surface are engaged to one another so as to facilitate transmission of rotary power therebetween. The shaft structure and the flange structure are fixedly secured to one another to facilitate the transmission of rotary power therebetween.

Abstract: Method and apparatus for making a contoured muntin bar. A supply of sheet material having a finished surface on at least one side in the form of a coiled ribbon is unwound and fed along a strip path of travel to a punch station. At the punch station a ribbon punching mechanism punches the ribbon at a precisely predetermined locations along the ribbon to form one of a plurality notch patterns that define a portion of a contoured muntin bar. Downstream along the travel path from the punch station the ribbon is fed through a forming station having a succession of forming rolls that define a succession of forming roll nips to bend the ribbon and form a generally closed cross-sectional tube. The rolls form a number of bending stages to produce a muntin bar tube having a contoured shape with raised sides to provide an attractive appearance to a muntin grid.

Abstract: An endless yarn braking strip for a yarn tensioning device consists of precipitation hardened stainless steel (S). The endless yarn braking strip is produced by first manufacturing an endless blank from a sheet of precipitation hardening steel, shaping the blank into a truncated cone in its endless form, and then hardening the strip by precipitation hardening.

Abstract: A method for manufacturing a fluid coupling including the steps of forming an elongated bar stock having a profile with a longitudinally extending protuberance projecting radially outwardly from a longitudinal axis of the bar stock. A longitudinal section of the bar stock is then machined in the end of the bar and that section includes a portion of the protuberance. A first fluid passageway is machined longitudinally in the machined section while a second fluid passageway is machined in the protruding portion of the machined section. The axis of the first fluid passageway intersects the axis of the second fluid passageway at an angle.

Abstract: A method for manufacturing a colored plastic cutting board with anti-bacteria effect is disclosed. A pressing machine has material suppliers for supplying plastic material from an opening. The lower anti-bacteria layer and the middle supporting plate are outputted from an output. The lower anti-bacteria layer and the middle supporting plate are placed upon a substrate. Then they are transferred to be under a roller; and then a printing film is coated upon a top surface of the middle supporting plate. The printing film is printed with pattern. Then the cutting board is transferred to another pressing device which feeds a top transparent protecting layer upon the printing film. Then, the substrate is sent to a punching device for being punched so as to form a cutting board which have a fixed shape. Thereby, the process of printing and anti-bacteria can be performed continuously.

Abstract: To provide a method for machining a workpiece, whereby chips are removed from the workpiece, wherein sufficient lubrication of the machining tool and sufficient cooling of the machining tool and the workpiece being machined are ensured, and chips resulting from the machining are simultaneously prevented from remaining inside recesses in the workpiece, a method comprising the following method steps is proposed:

Abstract: It is an object of the invention to provide a method of working an injection hole of an electromagnetic type fuel injection valve so that when extrusion by using a punch is adopted, the punch does not break, even in the case where a central axis line of the injection hole of the electromagnetic type fuel injection valve is inclined to a line perpendicular to a face of a plate-like material to be punched. A front end, tapered portion of the punch is inclined in a direction opposed to a plate-like material relative to a central axis line of the punch to facilitate the punch along a sliding, inner face of a punch holder. While achieving a reduction in production cost, the divergent-shaped injection hole can accurately be formed in the plate-like material. A side force (Fs) is produced when the front end portion of the punch impinges on the plate-like material.

Abstract: An insulation piece for joining with a similar piece to surround a pipe elbow of a larger diameter such as greater than 9 inches outside diameter is formed by cutting from a block of the insulation material.

Abstract: The invention relates to a method for finishing the ball star of a homocinetic joint, especially for automobiles. The ball star has a ball ring-shaped bearing surface for mounting in a ball cage, and has a plurality of essentially axial running guideways provided for the balls. Said balls are arranged in the ball recesses of the ball cage and transmit torque between the ball cup and the ball star. In order to be able to finish such ball stars quickly, economically and as fully automatic as possible, the invention provides that both the ring-shaped bearing surface provided for mounting in the ball cage as well as guideways provided for the balls are produced by a hard-rotary turning operation.

Abstract: A method for forming a cavity structure provided with a thin bottom plate is comprises the following steps. The first step is to deform plastically a part of a metal plate so as to form a cavity on one surface of a metal plate wherein the cavity has an oddly bottom surface provided with subsections being different from each other in depth. Simultaneously a protrusion is formed on the other surface of the metal plate by shifting an amount of metal corresponding to the cavity into the protrusion wherein the protrusion has substantially similar figure to the cavity. Then a coupling section, which keeps the protrusion integral with the metal plate, is formed so as to make the protrusion smaller than the cavity. And the protrusion is removed from the metal plate so as to make the other surface of the metal plate flat and to form the bottom plate of the cavity thin while remaining the coupling section.

Abstract: The present invention relates to a method of producing a sliding sleeve for gearshfft mechanisms. The method according to the present invention comprises two forming steps. In the first forming step a preform, which has been pushed onto a tool mandrel with an external toothing, is formed by means of roller spinning so as to form on the inner circumferential surface of said preform the toothing implemented on the outer circumferential surface of the tool mandrel. Subsequently, the thus formed preform is formed by profile rolling on its outer circumferential surface so as to obtain a formed part. Finally, the tool mandrel is removed from the formed part.

Abstract: Firstly, using a cutting tool 30, connecting ribs 13 are cut off from the end face of a duplex pipe 10 which is held with an outer pipe 11 chucked (rib cutting step). Next, the duplex pipe 10 is cut at and from the end face of the duplex pipe 10 up to the portion thereof corresponding to the exposed length of the inner pipe 12 to thereby form a slit 21 in the outer pipe 11 and connecting ribs 13 (slit forming step) The cutting tool 30 comprises a guide hole 31 into which the inner pipe 12 can be inserted while guiding the inner pipe outer peripheral surface 12a, a cutting device 32 for cutting the connecting ribs 13, and a guide pin 33 which is disposed in the guide hole 31 and can be inserted into the inner pipe 12 while guiding the inner pipe inner peripheral surface 12b.

Abstract: Material for a connecting rod for an internal combustion engine is carburized and quenched, a carburized layer formed on the bearing portion is ground until the portion which exhibits the maximum compressive residual stress, and a shot-peening processing is performed on the ground surface. The invention produces a bearing portion having surface characteristics in which maximum compressive residual stress is imparted, and therefore, remarkable improvement in the fatigue strength in the bearing portion can be obtained. Furthermore, a large number of concavities formed by the shot-peening processing can be efficiently employed as an oil reservoir, so that sliding properties and lubrication can be improved, and the occurrence of problems such as fretting corrosion, galling, and seize can also be solved, and the galling and problems of the seize can be prevented.

Abstract: A milling machine includes a bi-directional, variable speed, rotary workpiece-holding table, a table drive sized to achieve relatively high acceleration and deceleration rates, a cutting tool mounted to a single or dual axis head, and a control system adapted to achieve a high degree of tool position and table rotational position accuracy cooperating to permit high-speed machining operations, including substantially dome-shaped parts characterized by circumferential surface portions interruped by radial wall portions. A dual table drive and interchangeable head arrangement make the machine also suitable for conventional turret lathe operations.

Abstract: A novel striker for locking a glove box comprises a bracket (11) having at least two fastener holes (13), a bracket (11) being attached to an interior wall of crash pad or dashboard by fasteners through fastener holes (13) and a U-shaped latching loop (15, 25) being formed integrally with the bracket (11). The glove box is located in front of a passenger seat and hinged at the crash pad or dashboard for storing the miscellaneous in a vehicle. The U-shaped latching loop (15, 25) is upwardly bent with a predetermined angle against the bracket (11). A noise damping material (19) is coated on the latching loop (15, 25) by ejecting synthetic resins.

Abstract: A method of attaching an air duct to a recuperator core may include welding a pair of butterpasses along a length of each of a plurality of core portions, connecting the plurality of core portions to one another to form the recuperator core and a pair of butterpasses extending along a length of the recuperator core, and attaching the air duct to the recuperator core along at least a portion of the pair of butterpasses. The method may also include controllably moving a welding torch into the air duct and along substantially the length of the recuperator core and controllably welding each butterpass to the air duct along substantially the length of the recuperator core without adding metal to the weld.

Abstract: A method of processing the connecting surfaces between a marine engine frame and an associated bearing support, which parts wholly or partially surround a crankshaft is presented. The bearing support is removed to expose the connecting surface of the engine frame facing towards the bearing support. An auxiliary plane is established which is set-up/extended along the centerline of the crankshaft, and a second line at right-angles to the centerline. In situ processing of the connecting surface of the engine frame is effected at an angle which is a function of the position of the auxiliary plane. It is thus possible to process the connecting surface of the engine frame facing towards the bearing support without the necessity of having to remove the engine frame itself, and to carry out the processing of at least this free connecting surface, while the actual bearing support can be processed in the normal manner.

Abstract: A method is provided for matching dimensions of a spool to a control valve body of a fuel injector. The method includes the steps of measuring land locations and an overall length of a first component of the fuel injector and measuring land locations of a second component of the fuel injector relative to at least each other. The method also includes calculating a grinding amount to be removed from the second component based on the following criteria (i) the measured land locations and the overall length of the first component and (ii) the measured land locations of the second component relative to each other.

Abstract: A process for manufacturing fuel tanks by blast shaping of steel is described, preferably stainless steel and occasionally, another type of carbon steel, especially for the type of fuel tanks to be assembled in automobiles, with any simple or complex, reinforced shape and with a wall thicknesses permitting up to a 50% weight reduction with regard to conventional tanks. The process comprises the preparation of flat or not flat metallic pre-forms, with identical or different dimensions, able to be eventually subjected to pre-heating, in order to then be placed into a mold which has the impression which is desired to be transferred, and to be subjected to a blast shaping operation with the use of a suitable fluid (liquid, gas or mixture of both), with the eventual application of intermediate heating operations where applicable.

Abstract: Method for manufacturing a vane (1) to a gas turbine component intended for guiding a gas flow. The vane (1) is produced by casting, and an internal hole (3) for coolant is then cut out of the cast vane (1). The vane (1) is provided with a starter hole (5), either during casting or once casting is completed, following which the internal hole (3) for coolant is cut out of the vane, proceeding from the starter hole. A method is also disclosed for manufacturing a gas turbine component including a plurality of vanes (1) for guiding a gas flow. The gas turbine component is cast in such a way that it includes the vanes and an internal hole (3) for coolant is then cut out of each of the vanes.

Abstract: A method of manufacturing a fatigue life enhanced product from a plurality of workpiece parts. At least one fatigue enhancing operation is performed on a first workpiece at a first work station. At least one fatigue enhancing operation is performed on a second workpiece at a second work station. The first and second workpieces are transferred to a first assembly station, where the workpieces are joined to form a fatigue life enhanced product. Aerostructures manufactured according to the method may include components fabricated at different locations to have fatigue life enhancing properties, especially in bounding material adjacent to holes designed to accommodate fasteners. By use of the method, the final assembly step can thus avoid the necessity to include the processing of holes to enhance fatigue life, since this step has been performed prior to bringing components into position to be joined in the final shape or assembly of the airframe.

Abstract: In a manufacturing method of a valve plate for a compressor according to this invention, a punch die 43 formed with a convex and concave configuration at its tip end face 42 is set at a press machine 41, and the punch die 43 is depressed against a surface of a valve plate 9 to transfer the convex and concave configuration of the tip end face 42. Thus, peripheral portions of a suction port and a discharge port of the valve plate 9 are roughened.

Abstract: A method of manufacturing medical devices of a size sufficiently small to be passed through the vasculature of the body, and more particularly through the small vessels of the brain. The method includes the steps of laser cutting a pattern of apertures in the surface of a tubular workpiece, radially compressing the tubular workpiece to reduce the outer dimensions of the workpiece and heat setting the reduced diameter workpiece to form the very small medical device.

Abstract: A tube and method of making the same for a heat exchanger includes a base, a top spaced from and opposing the base, a first side interposed between the base and the top along one side thereof, and a second side interposed between the base and the top along another side thereof. The tube includes an end form formed solely on either one of the first side and the second side to create a stop for inserting said tube into a manifold of the heat exchanger.

Abstract: The invention relates to a method for the production of a tool, in particular a drill (6) or milling cutter, having at least one conveying helix (8a, 8b), proceeding from a bar-shaped blank (1). In this case, there is provision for introducing the conveying helix (8a, 8b) in a single operation by means of a machine tool, the blank (1) having a diameter (DR) which is larger than a diameter (dF) of the conveying helix (8a, 8b).

Abstract: A method for manufacturing a banjo-type drive axle housing for a motor vehicle is disclosed. The first step is the operation of forming the substantially identical upper and lower half members having a U-shaped cross-section along entire length thereof with radially extending wall sections. Each of the members is metal formed, such as by stamping or forging, from a blank sheet of steel. Next step is to select a desired box-section of an axle beam portions, and a desired size of an opening in a central portion of the axle housing. Then, if necessary, the wall sections of the housing half members are trimmed so that when assembled said housing half members provide the desired box section and size of the opening in the central portion of the axle housing. Finally, the trimmed housing half members are welded to each other to produce the axle housing.

Abstract: A method of manufacturing a gas turbine engine fan blade (10) comprises forming three metal workpieces (50,52,54). A metal slab (30) is upset forged at both ends (32,34) to produce a metal block (40) with increased thickness (42,44) extending from opposite surfaces (36,38). The metal block (40) is cut in an inclined path to form two of the metal workpieces (50,52). The metal workpieces (50,52,54) are assembled into a stack (56) so that the flat surfaces (38,42,46,48) are in mating abutment. Heat and pressure is applied across the thickness of the metal workpieces (50,52,54) to diffusion bond the metal workpieces (53,52,54) together to form an integral structure (100). The integral structure (100) is hot creep formed and superplastically formed to produce the required aerofoil shape and the thickened end is machined to form the blade root (26). The method enables thinner metallic workpieces with better microstructure to be used and increases the yield of metallic workpieces.

Abstract: An apparatus and method of utilization thereof is provided for machining pistons of reciprocating piston internal combustion engines. The piston is held in a work station by its interior cavity and the oil rings, oval side surface and hinge pin bore are machined on the piston without any refixturing of the piston required.

Abstract: The invention relates to a method for producing hollow bodies such as nut elements to be fastened to components that usually consist of sheet metal. The invention especially relates to a method for producing hollow bodies with an at least substantially square or rectangular outline by cutting individual bodies from a profile in the form of a profile rod or a reel after respective holes have been punched into the profile, and optionally afterwards producing a threaded cylinder. The inventive method is further characterized in that before or after the punching of the profile a passage treatment is carried out in order to produce a cylindrical or annular projection, concentric to the punching or the intended punching, on the side of the profile facing the component by flow of material. The projection is optionally shaped to an annular punched section in an additional molding cycle. The invention further relates to various hollow bodies, assembly units and molds for producing said hollow bodies.

Abstract: A tread pattern having at least one circumferential groove and transverse grooves extending from the circumferential groove defining tread blocks there between. The tread blocks include sidewalls limiting the longitudinal groove laterally and projections projecting from the sidewalls into the circumferential groove. The width of each of the projections is less than 10% the circumferential dimension of the respective tread block. To convert a mold having elements that produce tread blocks with substantially flat sidewalls into a mold that produces the tread pattern, channels are machines into the sidewalls of the mold elements.

Abstract: A method of fabricating a catalyst converter includes the steps of: obtaining a tubular member by rolling up a metallic plate member of a rectangular shape having ear portions at four corners thereof such that opposing ones of the ear portions abut against each other, and by effecting butt welding for both ends of the plate member; cutting off projecting portions formed by the ear portions at both ends of a weld of the tubular member; incorporating a catalyst carrier into the tubular member with the projecting portions cut off; effecting drawing for both end portions of the tubular member with the catalyst carrier incorporated therein; and attaching a pair of flanges, respectively, to the both end portions of the tubular member subjected to drawing.