JPS55123448A - Method for production of pressboard molding - Google Patents

Method for production of pressboard molding

Info

Publication number
JPS55123448A
JPS55123448A JP3047979A JP3047979A JPS55123448A JP S55123448 A JPS55123448 A JP S55123448A JP 3047979 A JP3047979 A JP 3047979A JP 3047979 A JP3047979 A JP 3047979A JP S55123448 A JPS55123448 A JP S55123448A
Authority
JP
Japan
Prior art keywords
molding
pressboard
mold
outer frame
wet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3047979A
Other languages
Japanese (ja)
Inventor
Yoshihiro Sato
Hisahide Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3047979A priority Critical patent/JPS55123448A/en
Publication of JPS55123448A publication Critical patent/JPS55123448A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)

Abstract

PURPOSE: To obtain a pressboard molding for insulating windings of transformers or the like excellent in the dielectric strength and the mechanical employing strength by heat pressing a wet pressboard as material on a specified condition employing a hot press pressurable from three ways.
CONSTITUTION: For example in the molding of a corner end insulator 4, a wet pressboard M is attached to the body 34a of a middle mold 34 and then, the body 34a of the mold is inserted into a space formed by outer frame molds 32 and 33. Then, a mobile outer frame mold 33 and a pressurizing body 35 are pressed being heated in the direction of the arrow. With such an arrangement, a wet pressboard M as molding material is heat pressed with a fixed outer frame mold 32, a mobile outer frame mold 33 and the middle mold 34 and molded into a shape of the corner end. With the molding condition set at about 80W150°C and 10W180kg/cm2, a molding can be obtained at any value within the range of 0.7W1.2kg/cm3 in the density thereof.
COPYRIGHT: (C)1980,JPO&Japio
JP3047979A 1979-03-15 1979-03-15 Method for production of pressboard molding Pending JPS55123448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3047979A JPS55123448A (en) 1979-03-15 1979-03-15 Method for production of pressboard molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3047979A JPS55123448A (en) 1979-03-15 1979-03-15 Method for production of pressboard molding

Publications (1)

Publication Number Publication Date
JPS55123448A true JPS55123448A (en) 1980-09-22

Family

ID=12304972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3047979A Pending JPS55123448A (en) 1979-03-15 1979-03-15 Method for production of pressboard molding

Country Status (1)

Country Link
JP (1) JPS55123448A (en)

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