A method for producing a ring gear for a planetary gear train, wherein a continuous profile is produced by an extrusion process and the continuous profile is subsequently cut to a predetermined cutting length in order to form a ring gear body.

A resin gear includes a web with a side surface on which a first annular rib and a second annular rib are formed to be concentric with a boss. The web has an inner web portion coupling the first annular rib to the second annular rib, and an outer web portion coupling the second annular rib to a rim. The inner web portion is formed to have a thickness gradually reduced from one intersection point toward another intersection point, the intersection points being intersection points of a virtual radial direction line passing through a center of the boss with the second annular rib. The first annular rib has a side surface on which only one gate mark of an injection molding is formed at a position on a radially outer side with respect to a first tooth portion and a position biased to the other intersection point on the virtual radial direction line.

A method for producing a composite material molded article includes a process of, from a solution in which reinforcing fibers with an average fiber length of 0.5 mm or more and thermosetting resin are dispersed and mixed in a solvent, removing the solvent by paper-making to form a preform, and a process of press molding the obtained preform using a mold set at a temperature equal to or higher than a curing temperature of the thermosetting resin to form the composite material molded article.

A component comprises a first part and a second part, wherein said second part is in contact with said first part, wherein: (i) said first part comprises a first polymer which is semi-crystalline and includes phenylene moieties, carbonyl moieties and ether moieties; (ii) said second part comprises a second polymer which is semi-crystalline and includes phenylene moieties, carbonyl moieties and ether moieties; (iii) the melting temperature (Tm) of the second polymer is less than the melting temperature (Tm) of the first polymer. In a preferred embodiment, said first polymer is polyetheretherketone and said second polymer is a copolymer having a repeat unit of formula VIII and a repeat unit of formula IX.

The invention provides a building block for a mechanical construction. The invention further provides a bearing and a method of producing the building block. The building block provides a first printed material printed via an additive manufacturing process on or at least partially embedded in a second material. The first printed material is printed in a pattern configured and constructed for cooperating with a sensor for providing position information of the building block relative to the sensor. The sensor may be a magnetic sensor or an optical sensor. The first printed material may include magnetic particles. The method of producing the building block may include a step of adding the first printed material to the second material via the additive manufacturing process under the influence of a predefined magnetic field.

Provided is a fiber reinforced resin gear whose durability in use under a high temperature is enhanced. A fiber reinforced resin gear is formed by injecting a resin material containing glass wool into the inside of a cavity of a mold. A fiber diameter of the glass wool is scattered in a wide range of 0.1 to 15 m, and is distributed such that a most frequent value of the fiber diameter appears within a range of 2 to 5 m, and an average fiber diameter of the glass wool falls within a range of 3 to 5 m. The fiber reinforced resin gear according to the present invention can enhance durability and abrasion resistance under a high temperature compared to a conventional fiber reinforced resin gear.

A process for the production of a shaped object, including: (a) providing a mould including a cavity formed to produce an object of a desired shape; (b) heating the mould to a temperature of 145 C.; (c) supplying an ultra-high molecular weight polyethylene (UHMWPE) material into the mould; (d) closing the mould with a punch counterpart having such shape as to fit together with the mould cavity to form the shape of the desired object; (e) applying a compaction pressure through the punch to the material that is present in the mould, whilst maintaining the mould temperature, for such a compaction time that the material fuses to form the desired shape; (f) releasing the compaction pressure and removing the shaped object from the mould at a temperature of 145 C.; and (g) cooling the shaped object to a temperature of below the melting temperature of the UHMWPE material.

A worm wheel includes: a sleeve; and a toothed portion provided by injection molding so as to cover a part of the sleeve, the toothed portion including a first thick portion provided on a first side face, which is a surface of the sleeve on a side closer to an injection-mold gate in an axial direction, and a second thick portion provided on a second side face, which is a surface on an opposite side to the first side face. A central part, in the axial direction, of the outer peripheral surface of the sleeve projects in the radial direction relative to both ends in the axial direction. The first thick portion of the toothed portion has a smaller thickness in the axial direction than the second thick portion.

A method for manufacturing a wheel including a step (a) during which a liquid to be polymerised is cast into a first mould so as to solidify same into a tubular preform, with main axis, the first mould including modelling cores in order to form recesses, of the rib type, in the radial thickness of the tubular preform; followed by a cutting step (b), during which the tubular preform is cut perpendicular to the main axis thereof, and secant to the recesses, so as to obtain a tubular preform section forming a rim; followed by an overmoulding step (d), during which said rim is placed in a second mould, concentrically with a central supporting member, such as a bushing or a shaft, and a polymer filling material is injected so as to create an intermediate disc that provides the attachment of the rim to the central supporting member.

The invention provides a building block for a mechanical construction. The invention further provides a bearing and a method of producing the building block. The building block provides a first printed material printed via an additive manufacturing process on or at least partially embedded in a second material. The first printed material is printed in a pattern configured and constructed for cooperating with a sensor for providing position information of the building block relative to the sensor. The sensor may be a magnetic sensor or an optical sensor. The first printed material may include magnetic particles. The method of producing the building block may include a step of adding the first printed material to the second material via the additive manufacturing process under the influence of a predefined magnetic field.