JPS55161551A - Frame body for vacuum molding - Google Patents

Frame body for vacuum molding

Info

Publication number
JPS55161551A
JPS55161551A JP7011779A JP7011779A JPS55161551A JP S55161551 A JPS55161551 A JP S55161551A JP 7011779 A JP7011779 A JP 7011779A JP 7011779 A JP7011779 A JP 7011779A JP S55161551 A JPS55161551 A JP S55161551A
Authority
JP
Japan
Prior art keywords
pressure
silica sand
frame body
reducing
thence
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
JP7011779A
Other languages
Japanese (ja)
Inventor
Mutsuo Uchida
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7011779A priority Critical patent/JPS55161551A/en
Publication of JPS55161551A publication Critical patent/JPS55161551A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/01—Flasks; Accessories therefor for vacuum-sealed moulding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

PURPOSE:To make the frame body applicable for target products of various sizes by segmenting the opening part of the pressure-reducing chamber to plural segments and selectively communicating these with a pressure-reducing source. CONSTITUTION:After the completion of film forming work, the frame body for vacuum molding is placed on a molding board 6 and the effective active area of a vacuum filter 4 is adjusted in the height direction in correspondence to the height of the product. Next, silica sand 17 is charged into a metal frame 1 up to the height corresponding to the top end of the segment chamber 21B, thence vibrations are applied to increase the rate of packing. Thence, the top surface of the silica sand 17 is covered with a plastic film 18 and a vacuum pump 14 is mounted to the suction port 3 of an external pressure-reducing box 20 by way of a hose 13. As a result of this, only the segment chambers 21B and 21C in the metal flask 1 are selectively evacuated through the on-off valve 24 of a vent port 23, by which the packed silica sand 17 is pressure-reduced and set. At the same time, the plastic film 18 contacts the silica sand 17 closely. Here, if the pressure reduction of the molding board 6 is released and the pattern 10 removed, the mold holding the outside peripheral shape of the pattern 10 under reduced pressure by being sealed by the plastic films 15 and 18 is obtained.
JP7011779A 1979-06-06 1979-06-06 Frame body for vacuum molding Pending JPS55161551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7011779A JPS55161551A (en) 1979-06-06 1979-06-06 Frame body for vacuum molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7011779A JPS55161551A (en) 1979-06-06 1979-06-06 Frame body for vacuum molding

Publications (1)

Publication Number Publication Date
JPS55161551A true JPS55161551A (en) 1980-12-16

Family

ID=13422277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7011779A Pending JPS55161551A (en) 1979-06-06 1979-06-06 Frame body for vacuum molding

Country Status (1)

Country Link
JP (1) JPS55161551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104972076A (en) * 2015-06-30 2015-10-14 林怀敏 Vacuum casting electric heating sand box and double-metal thermal compounding casting method using vacuum casting electric heating sand box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104972076A (en) * 2015-06-30 2015-10-14 林怀敏 Vacuum casting electric heating sand box and double-metal thermal compounding casting method using vacuum casting electric heating sand box

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