摘要:
Ethylene homopolymers and copolymers are prepared in a tube reactor at from 160° C. to 350° C. and pressures in the range from 500 to 5000 bar, with or without use of molar mass regulators, using a peroxide mixture comprising from 1 to 95 mol %, based on the total amount of the peroxide mixture, of at least one cyclic peroxide of the formula I, where the radicals R are identical or different and are selected from among alkyl groups and aryl groups, as polymerization initiator.
摘要:
Novel ethylene homopolymers and ethylene copolymers which are suitable for film production and have a density from 925 to 940 kg /m.sup.3, a melt flow index (MFI) of
摘要翻译:新型乙烯均聚物和乙烯共聚物适用于薄膜生产,密度为925至940 kg / m3,熔体流动指数(MFI)在190℃时为<1 g / 10 min,施加力为2.16 kp可以通过在500至5000巴的单体的自由基聚合和40至320℃的反应温度T之间通过在至少n = 3个聚合阶段中几乎完全排除氧的引发剂进行制备。 在第一阶段,单体的总量或主要部分通过部分所需的引发剂进行聚合,直到聚合实际上停止。 然后将另一部分引发剂和如果需要的单体加入冷却至20℃-60℃的混合物中。该过程在后续阶段重复直到第n阶段,至少在第 n阶段,其半衰期温度为90℃〜260℃,最大反应温度Tmax为270℃以上,至少在第n阶段。
摘要:
An electric drive unit for vehicle systems, such as power windows and windshield wipers, having a commutator motor that has a commutator and at least two commutator brushes. The electric drive unit includes electrical components of an electronic system for the motor. To reduce production costs and simplify assembly, the electrical components are electrically secured to a lead frame that makes the electrical connection between the components and the commutator motor and the commutator brushes are embodied as hammerhead brushes, whose carrier plates are bent in one piece out of the lead frame.
摘要:
A releasable fastening device, especially for attachments on convertibles, by means of which the attachment can be snapped reversibly without further aids to the convertible body. A hook part connected pivotably to the attachment via a tensioning device can be hooked at a body part bordering a receptacle on the convertible body and can be braced against the receptacle by means of the tensioning device, after which the fastening device is fixed in its end position by means of a beyond dead-center position of the tensioning device. Distance tolerances between the receptacle and attachment can be compensated by a change of length within the tensioning device. The tensioning device is formed only by a flexural spring which is pivotably mounted at one end on the hook part and at the other end on the attachment.
摘要:
In an electric-motor drive device for auxiliary devices in motor vehicles, such as sliding roofs, window controls, windshield wipers, and the like, having a gear housing (17) and a cup-shaped motor housing (13) that is slipped with its opening edge (131) onto the gear housing (17) and fixed thereon, to reduce manufacturing costs and the requisite installation space and improve force introduction from the motor housing (13) to the gear housing (17), the motor housing (13), in its slip-on region, is roller-burnished into the gear housing (17).
摘要:
An electric drive unit for windshield washers of a motor vehicle, including a drive motor having an armature accommodated in a substantially cup-shaped pole housing, a substantially cup-shaped gearbox, secured by its face end to the pole housing, for receiving at least one transmission gear wheel that meshes with a worm connected to an armature shaft of the armature. The armature shaft has a mushroom-shaped stop face on its face end, against which a spring for generating a defined initial stress comes to rest. The spring is a curved bendable spring, which has a substantially V-shaped profile, with a tensioning plate secured in the gearbox and with a leg that yields in the axial direction of the armature shaft, which in the installed state of rest, the spring exerts a spring force, on the mushroom-shaped face of the armature shaft.
摘要:
An electric drive unit, for windshield wipers of a motor vehicle, including a drive motor, having an armature accommodated in a substantially cup-shaped pole housing, and including a gearbox, secured by a face end to the pole housing for receiving at least one worm, wheel supported on a power takeoff shaft. The worm wheel engages a worm connected to an armature shaft of the drive motor. The power takeoff shaft is supported in an eccentric bush which is rotatable to set the axial spacing between the armature shaft and the power takeoff shaft and can be mounted in the rotated state, in a manner fixed against relative rotation, in the gearbox. The eccentric bush is embodied in a graduated fashion, such that it has a larger diameter on a side toward the flange than on another side remote from the flange.
摘要:
An electric drive unit for windshield wipers of a motor vehicle, including a drive motor having an armature accommodated in a substantially cup-shaped pole housing, a substantially cup-shaped gearbox, secured on a face end to the pole housing, for receiving gear elements that convert the rotation of an armature shaft of the armature, supported on one end in the pole housing and on the other end in the gearbox. The armature shaft, adjacent to a bottom of the pole housing, is supported in a cylinder bearing mounted with a press-fit, whose outer diameter is greater than or equal to three times a length of the cylinder bearing.
摘要:
An electric motor-and-gear assembly for driving vehicle aggregates such as windshield and rear window wipers, power-window units and the like, having a transmission housing that can be closed by a housing cover. A motor housing that contains a commutator motor whose commutator protrudes into the transmission housing and cooperates with a brush holder fixed in the transmission housing. For the sake of a more reasonably priced manufacture and a time-saving, more rapid assembly of the brush holder, the commutator brushes are embodied as hammer brushes with spring leaf actuators prestressed toward the commutator. The spring leaf actuator are respectively fixed with their one actuator end in a U-shaped plastic carrying part of the brush holder, which is inserted into the transmission housing radial to the commutator, through the housing opening and is positioned in the transmission housing in a positively engaging manner by means of the housing cover.
摘要:
A process and an apparatus (10) for the production of a plastic article of large area and small wall thickness, wherein the plastic material (90) is injected in the viscous condition into a mold cavity which is defined by a bottom mold portion (20) and a top mold portion (36). During the operation of injection of the viscous plastic material, which takes place through an inlet (76), the top mold portion (36), with the bottom mold portion (20), forms a pre-molding cavity (86) which is enlarged in a wedge shape starting from the inlet (76). During injection of the viscous plastic material (90) into the pre-molding cavity (86) or immediately after the injection operation, the bottom and top mold portions (20, 36) are moved relatively towards each other, forming the definitive mold cavity (78), so that the viscous plastic material is uniformly distributed in the diminishing mold cavity.