GB788789A - Improved method of reducing thickness variations in sheet material - Google Patents

Improved method of reducing thickness variations in sheet material

Info

Publication number
GB788789A
GB788789A GB2671254A GB2671254A GB788789A GB 788789 A GB788789 A GB 788789A GB 2671254 A GB2671254 A GB 2671254A GB 2671254 A GB2671254 A GB 2671254A GB 788789 A GB788789 A GB 788789A
Authority
GB
United Kingdom
Prior art keywords
rollers
sheet
thickness variations
sheet material
improved method
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.)
Expired
Application number
GB2671254A
Inventor
Herbert Edward Holman
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2671254A priority Critical patent/GB788789A/en
Publication of GB788789A publication Critical patent/GB788789A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

One or each of a pair of rollers is reduced in diameter between its ends to form an annular recess so that, when the ends of the rollers are urged into contact, a gap remains between them. The rollers are used to reduce thickness variations in sheet material, particularly thermoplastic material such as polyvinyl chloride, which is unwound from a roll, passed through a heating zone, drawn between the rollers, cooled and wound on another roll. The speed of rotation of, and pressure between, the rollers are suitable for smoothing the sheet to a constant thickness equal to the gap. Cooling water may be passed through the rollers. The invention has particular application to plastic sheet which is to be coated with magnetisable material, but is also applicable to the rolling of ductile metal sheet.
GB2671254A 1954-09-15 1954-09-15 Improved method of reducing thickness variations in sheet material Expired GB788789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2671254A GB788789A (en) 1954-09-15 1954-09-15 Improved method of reducing thickness variations in sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2671254A GB788789A (en) 1954-09-15 1954-09-15 Improved method of reducing thickness variations in sheet material

Publications (1)

Publication Number Publication Date
GB788789A true GB788789A (en) 1958-01-08

Family

ID=10248036

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2671254A Expired GB788789A (en) 1954-09-15 1954-09-15 Improved method of reducing thickness variations in sheet material

Country Status (1)

Country Link
GB (1) GB788789A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052917A (en) * 1959-08-10 1962-09-11 Celanese Corp Production of wrinkle-free film
CN105728461A (en) * 2016-03-17 2016-07-06 杨尹华 Hot-drawing rolling mill and transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052917A (en) * 1959-08-10 1962-09-11 Celanese Corp Production of wrinkle-free film
CN105728461A (en) * 2016-03-17 2016-07-06 杨尹华 Hot-drawing rolling mill and transmission device

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