US1887917A - Stereotype plate casting machine - Google Patents

Stereotype plate casting machine Download PDF

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Publication number
US1887917A
US1887917A US564485A US56448531A US1887917A US 1887917 A US1887917 A US 1887917A US 564485 A US564485 A US 564485A US 56448531 A US56448531 A US 56448531A US 1887917 A US1887917 A US 1887917A
Authority
US
United States
Prior art keywords
metal
mould
pressure
valve
casting machine
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 - Lifetime
Application number
US564485A
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English (en)
Inventor
Brockel Ernst
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.)
MAN AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
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 MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Application granted granted Critical
Publication of US1887917A publication Critical patent/US1887917A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41D—APPARATUS FOR THE MECHANICAL REPRODUCTION OF PRINTING SURFACES FOR STEREOTYPE PRINTING; SHAPING ELASTIC OR DEFORMABLE MATERIAL TO FORM PRINTING SURFACES
    • B41D3/00—Casting stereotype plates; Machines, moulds, or devices therefor

Definitions

  • the metal by the aid of partial vacuum is caused to ascend into one end of a pipe, closed at the-top, which isg'situated above the metal inlet of the mould and out of which the metal may, from above, flow into the mould.
  • the other end of the pipe dips into the molten metal.
  • the end, which is closed at the top may be connected alternately with a means for producing partial vacuum, such as a suction pump or a suction air vessel and, in order to raise the partial vacuum, with the outer air or a mfians for-producing pressure above atmosp eric.
  • the novel machine according to the invention the molten metal is caused to ascend by partial vacuum, but'then flowginto'the mould from above, so that the non-porously cast plate is sub'ected to the pressure of the A molten meta or in certain. cases, to addi-' tional pressure above atmospheric, whereby plates of particularly high density are obtained.
  • Figs. 13 of the drawing show a preferred form of the object of the invention
  • Fig. 1 is a vertical section of the whole machine
  • Figs. 2 and 3 show various positions of the controlling members
  • Figs. 46 show various positions of the controlling members in a slightly alternative form of the invention. I
  • piping 2 leads from the bottom of the melting pot 1 to the body 3 of a cock provided with a threeways plug 4.
  • this plug 4 the interior of the body of the cock may be put in communication with the mould 5 and the ascending pipe 6 which is closed on top. From the upper end of the ascending pipe 6,
  • iping 7, 8 leads to the vessel 9, from which y a suction pump, not shown, through a,
  • Piping 7 8 is provided with a three-ways cook 12 which in one position connects section 7 with section 8 and the vessel 9, and in the other ,p'osition connects section 7 of the piping with the aperture 13 which leads into the outer air or an air pressure vessel.
  • a float 16 is provided, which floats on the surface of the molten metal, and is fixed on a .journal pin 17.
  • a lever 18 is also fastened to the journal pin 17 and carries a set screw 19 which presses upon a spring 20, which in turn presses upon the valve-15, thereb maintaining the valve normally closed un er a sprin pressure which is proportionate to the leve of the metal in the pot.
  • the pressure of the spring 20 upon the cone 15 of the valve is low. Consequently the partial vacuum effected will, relative to the outside air, also be low, as the cone 15 of the valve will admit outside air as soon as a certain degree of pressure is reached.
  • the pressure exercised by the spring 20 will be higher; partial vacuum then approaches absolute vacuum and the metal will in this case also rise to the level A-A.
  • the metal in the mould will consequently solidify under the same pressure it, no matter whether the melting pot 1 contains: little metal or much metal.
  • the pi ing 7 in the position shown in Fig. 3 may, t rou h aperture 13, be connected with a means or producing pressure above atmospheric, such as a pressure air vessel, instead of the outer air.
  • a means or producing pressure above atmospheric such as a pressure air vessel
  • the suction side of a -d0uble acting pump will be connected with evacuate the mould.
  • WhatIclaimis 1. A casting. machine of the character described comprising, in combination, a melting pot, a mould, a valve casing havin a valve chamber in communication with t e upper end of the mould, a molten metal supply pi e opening at one end into the pot below 't e level of the metal therein and at its other end into said valve chamber, a container for molten metal located above the valve casing and opening at its lower end into said valve chamber, a source of sub-atmospheric pressure connected with the upper end of said container, means for cuttin ofl communication between said contamer and said source of sub-atmospheric pressure and for establishing communication between the upper end of said. container and a higher pressure at least as high as atmos-.
  • valve within said valve chamber movable to a position to establish communication between said pipe and said container and to simultaneously deny communication of both said pipe and said container with the mould, and also to another position in which communication of the pi with both the container and the mould is e-' nied and communication is, established be,- tween the container and the mould.
  • a casting machine as set forth in claim 111i 2.
  • a casting machine as set forth in claim 1 including means to assure that fora constant degree of sub-atmospheric pressure to which the container is subjected for elevating molten metal from the pot into said container, the molten metal always will rise in said container to a predetermined level irrespective of the level of the metal in the pot.
  • a casting machine as set forth in claim 1 including a pipe connection between the upper end of the container and the source of sub-atmospheric pressure, a valve in said pipe controlling communication between the pipe and a source of higher pressure at least as high as atmospheric pressure, a spring engaging said valve, and a member floating on the metal in the pot and operating throu h said spring to maintain the valve normafiy closed under a spring pressure which increases with lowering ofthe level of the liquid in the pot.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
US564485A 1930-10-04 1931-09-23 Stereotype plate casting machine Expired - Lifetime US1887917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE551340T 1930-10-04

Publications (1)

Publication Number Publication Date
US1887917A true US1887917A (en) 1932-11-15

Family

ID=6563003

Family Applications (1)

Application Number Title Priority Date Filing Date
US564485A Expired - Lifetime US1887917A (en) 1930-10-04 1931-09-23 Stereotype plate casting machine

Country Status (5)

Country Link
US (1) US1887917A (de)
AT (1) AT132740B (de)
CH (1) CH159683A (de)
DE (1) DE551340C (de)
GB (1) GB376091A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074128A (en) * 1958-12-11 1963-01-22 Maschf Augsburg Nuernberg Ag Casting stereotype plates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074128A (en) * 1958-12-11 1963-01-22 Maschf Augsburg Nuernberg Ag Casting stereotype plates

Also Published As

Publication number Publication date
DE551340C (de) 1932-05-30
AT132740B (de) 1933-04-10
CH159683A (de) 1933-01-31
GB376091A (en) 1932-07-07

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