Fukoku Co., Ltd.

Yasuji Takada

Kazuhiko Sueoka

Taro Kawamoto

A method and a reaction apparatus which can safely and continuously treat/discharge especially a short object is treated without any direct contact with a gas atmosphere, and which surely/efficiently treats the object with a gas without any uneven treatment. A short object A to be treated is put in a hermetically sealed cylindrical treatment section. In the treatment section, the object is held in a predetermined position by a first operation pieceto be treated with a gas for a predetermined time. Then, the holding by the first operation piece is released to move the object A by a desired distance. Subsequently, the object is held in a predetermined position by a second operation pieceto be treated again with the gas for a predetermined time, and then a treated object Ais discharged. This discharged treated object Ais conveyed to the outside of the apparatus.

Method and reaction apparatus for treating object with gas

Resin boots for constant velocity universal joint in which a different thickness portion is integrally formed in an inner diameter of a large diameter side end portion of a primarily molded resin bellows in accordance with a secondary molding. A resin bellows constituted by a bellows portion, and a small diameter side end portion and a large diameter side end portion which are provided in both end sides of the bellows portion is molded in accordance with a primary molding, and a different thickness portion corresponding to a secondarily molded product is integrally formed in an inner periphery of the large diameter aide end portion of the primarily molded resin bellows by being secondarily molded within an injection metal mold. At this time, a molten material of the different thickness portion is injected into a secondary molding space from an optional position of a thin portion.

Method of manufacturing resin boots for constant velocity universal joint

There is disclosed a boot for a constant-velocity universal joint, in which a secondary molded portion including a thick portion is formed in a large-diameter side end portion of a primary molded member, and the boot is easily pulled out of a core mold. The boot is downsized and lightened to reduce costs. A manufacturing method includes: a step of forming a secondary molding spacebetween an inner peripheral surface of a large-diameter side end portionof the primary molded member and an outer peripheral surface of a core mold; a step of injecting a molten material into the secondary molding space to mold the secondary molded portion; and a step of integrally molding a secondary molded member on the inner peripheral surface of the large-diameter side end portion of the primary molded member to form a boot, moving a removable portionof a second mold sectionof the core moldwhich abuts on at least the end portion of the thick portion in the vicinity of the bellows portion in a central axial direction of the core mold to remove the removable portion from an undercut portionof a thick portionjust before separating the boot from the core mold, and separating the core moldfrom the bootin this state.

Method of manufacturing boot for constant-velocity universal joint and manufacturing apparatus for use in the method, and boot for constant velocity universal joint

There is disclosed a manufacturing apparatus and method which are capable of smoothly removing a tripod boot integrated by secondary molding from a core without deforming the boot and which are superior in manufacturing efficiency and which are inexpensive, and a resin boot for a constant-velocity universal joint. The apparatus includes: divided molds which hold a primarily molded resin boot main body from the outside; a core which holds the boot main body from the inside; a runner mechanism which injects/charges a molten resin material into a secondary molding space formed between the core and an other-end annular fastening portion; and an ejection mechanism for removing the tripod boot in which portions having different thicknesses are integrally and secondarily molded on an inner periphery of the other-end annular fastening portion from the core. The ejection mechanism is provided with a plurality of ejectors in positions avoiding gates of the runner mechanism, and ejecting forces are applied onto lower end surface of the other-end annular fastening portion of the tripod boot from the ejectors to stably and smoothly remove the tripod boot from the core.

Method of manufacturing resin boot for constant-velocity universal joint

There is disclosed a boot for a constant-velocity universal joint, in which a secondary molded portion including a thick portion is formed on an inner peripheral portion of a large-diameter side end portion formed as a primary molded member and in which a material in secondary molding is prevented from leaking. A manufacturing method includes: a step of forming a secondary molding space between a large-diameter side end portion inner peripheral surface of the primary molded member and an outer peripheral surface of a core mold; and a step of injecting a molten material into the secondary molding space to mold the secondary molded portion. The step of molding the secondary molded portion includes the steps of: applying a pressure of the molten material injected into the secondary molding space to a tapered surfaceextending toward the large-diameter side end portion from a small-diameter portionjust in the vicinity of a large-diameter side end portionexpanding the tapered surface toward the small-diameter portion, and pressure-welding the small-diameter portionheld between the inner peripheral surface of a divided moldand the outer peripheral surface of a core moldonto the core mold outer peripheral surface.

Method of manufacturing boot for constant-velocity universal joint and manufacturing apparatus for use in the method, and boot for constant-velocity universal joint

A resin boots for constant velocity universal joint, including: a resin bellows including an approximately conical bellows-shaped portion with its inner hollow part, a small diameter end portion communicated with an inner space of the bellows-shaped portion and arranged at one end, and a large diameter side end portion communicated with the inner space of the bellows-shaped portion and arranged at the other end; a large thickness portion formed in an inner surface of a large diameter side end portion of the resin bellows in accordance with an injection molding, protruded in the vertical direction to the center of the large diameter side end portion and arranged in the circumferential direction at regular intervals; and a small thickness portion arranged between the large thickness portions and formed thinner in the diametrical direction compared with large thickness portion.

Resin boots for constant velocity universal joint

Shifting prevention and sealing property between a boot for a constant velocity universal joint, having a thick portion on the inner peripheral surface of a large-diameter-side end portion and the outer peripheral surface of a tripod joint casing are enhanced, costs for preparing the casing are reduced, and the preparation is facilitated. One or a plurality of seal lips are disposed in the form of protrusions over the whole periphery in a peripheral direction of the inner peripheral surface of the large-diameter-side end portion of the boot for the tripod joint, into which the casing of the tripod joint is inserted, shift preventive walls are disposed on opposite sides of an axial direction via the seal lip, and inner diameters of the shift preventive walls are formed to be smaller than those of base portions of the seal lips. The shift preventive walls and the seal lips are disposed right under a band fastening portion.

Boot for constant velocity universal joint

A boot for a constant velocity universal joint, having an inner surface that is prevented from contacting an edge portion of an outer housing of a constant velocity universal joint regardless of the bend of the boot. The boot includes a large end portion, a small end portion, and a bellows formed between the large and small end portions. The large end portion has an annular face portion facing the end face of a tip portion of the outer housing of the constant velocity universal joint, and defining a concave face portion dented to define an annular gap with the peripheral edge portion.

There are disclosed a method and a reaction apparatus which can safely and continuously treat/discharge especially a short object to be treated without any direct contact with a gas atmosphere, and which surely/efficiently treats the object with a gas without any uneven treatment. A short object A to be treated is put in a hermetically sealed cylindrical treatment section. In the treatment section, the object is held in a predetermined position by a first operation pieceto be treated with a gas for a predetermined time. Then, the holding by the first operation piece is released to move the object A by a desired distance. Subsequently, the object is held in a predetermined position by a second operation pieceto be treated again with the gas for a predetermined time, and then a treated object Ais discharged. This discharged treated object Ais conveyed to the outside of the apparatus.

An apparatus for manufacture of a hollow article having a configuration in which the wall thickness of each of both end portions changes multidirectionally with extremely high accuracy. The apparatus includes an annular orifice nozzle including a nozzle core and a nozzle mouthpiece. The nozzle mouthpiece is multi-divided vertically and laterally, and the divided part is disposed so as to be able to reciprocate laterally. A part of the upper portion of the nozzle mouthpiece is replaced with a blow mold and a lower portion can be moved laterally upon taking out a product.

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Ageo, Japan

Yasuji Takada