Title:
発泡電線の製造装置、発泡電線の製造方法
Document Type and Number:
Japanese Patent JP7159967
Kind Code:
B2
Abstract:
To provide an apparatus for manufacturing a foamed wire capable of suppressing the scattering of dielectric constants in a longitudinal direction even if reducing a thickness of a foamed insulator, a method for manufacturing a foamed wire, and a foamed wire.SOLUTION: In an apparatus 1 for manufacturing a foamed wire which forms a foamed insulator 12 around an outer periphery of a center conductor 11 by extruding and foaming a resin 3 from an extrusion metal mold 2 having a mandrel 21, and a mouthpiece 22, the mouthpiece 22 has a taper part 22a formed into taper-like so that an inner peripheral surface 22b gradually outspreads at an extruding exit thereof in an extrusion direction as a foam-growing part, and a foam nucleus-generating part 23 constituted by forming a plurality of protrusions 23a or concavities 23b or both of them on the inner peripheral surface 22b of the taper part 22a and is constituted so as to extrude nuclei 13a of the foam by flow of the resin while generating the nuclei 13a of the foam by the foam nucleus-generating part 23, growing the nuclei 13a of the foam in accordance with lowering of a resin pressure at the taper part 22a, and form a foam 13 in the foamed insulator 12.SELECTED DRAWING: Figure 1
Inventors:
Masahiro Abe
Application Number:
JP2019085534A
Publication Date:
October 25, 2022
Filing Date:
April 26, 2019
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
H01B13/14; B29C44/00; B29C44/50; B29C44/52; B29C48/15; B29C48/154; B29C48/30; B29C48/34
Domestic Patent References:
| JP2011228064A | ||||
| JP4325223A | ||||
| JP4144007A | ||||
| JP2002343142A | ||||
| JP1076622A | ||||
| JP2017220424A |
Attorney, Agent or Firm:
Hirata International Patent Office
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