Spinning device and spinning molding method for cylindrical material

Abstract

The present invention provides a cylindrical material spinning device which is formed at a cylindrical material protruding edge portion and will not deform and fall off from a tension giving mechanism even a larger tension is put in an axial direction of the cylindrical material and a spinning method. The spinning device has the tension giving mechanism (4) which applies the tension to the axial direction of the cylindrical material (1) through the protruding edge portion (11) formed at an opening end portion of the cylindrical material (1); and a supporting mechanism (5), wherein the protruding edge portion (11) of the cylindrical material (1) is clamped between the supporting mechanism and the tension giving mechanism (4), and ironing is performed while the tension is applied to the axial direction of the cylindrical material (1) when the protruding edge portion (11) of the cylindrical material (1) is clamped between the tension giving mechanism (4) and the supporting mechanism (5).

Description

[0001] This application claims priority based on Japanese Patent Application No. 2015-170074 filed on August 31, 2015. The entire contents of this Japanese application are incorporated herein by reference. technical field [0002] The invention relates to a spinning device and a spinning forming method for a cylindrical material. Background technique [0003] Conventionally, for manufacturing rollers of printers and copiers, toner cartridges, liners of thermos bottles, etc., a spin forming method using a spinning apparatus has been widely used (for example, refer to Patent Document 1). [0004] like image 3 As shown, the spinning method based on this spinning device is to fit a metal cylindrical material 10 on a mandrel 20 and make the tension imparting mechanism 40 protrude through the open end formed on the cylindrical material 10 . The edge portion 11 applies tension to the axial direction of the cylindrical material 10, and the roller 30 presses the cylindrical materia...

AI Technical Summary

Problems solved by technology

[0008] However, depending on the cylindrical material to be spin-formed, it may be necessary to increase the tension applied in the axial direction of the cylindrical material 10, and when a large tension acts in the axial direction, there is a flange-shaped protruding edge. The problem that the part 11 is deformed and falls off from the tension applying mechanism 40

[0009] In addition, it is required that the fork-shaped jig for releasing the cylindrical material 10 from the mandrel 20 by moving the reduced diameter cylindrical material 10 toward the front end side of the mandrel 20 should not interfere with the rollers. 30 operation in the way of interference, therefore, there is a problem that the operation cycle time increases

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