Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/10—Cores; Manufacture or installation of cores
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/06—Permanent moulds for shaped castings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
  • B22D17/20—Accessories: Details
  • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
  • B22D17/24—Accessories for locating and holding cores or inserts

Definitions

• the invention relates to a mold with at least one core pull in its wall.
• the molding (core sand) sleeve is cooled by the metal spigot. By simply trying it out, it should be possible to make the thickness of the sand sleeve as small as possible. This improves the cooling - an increase in cooling can be achieved by supplying water - less gas is produced and the shrinkage becomes less resistance after the core hardening has been moved out of the mold wall in a conventional manner (rack, hydraulic cylinder or the like) opposite; the cast can shrink freely. In any case, the sand sleeve can evade by collapsing and being destroyed.
• the method can be used with all castable materials, but is particularly advantageous for iron alloys and basalt.
• Fig. 1 shows a partial cross section through a mold according to the invention with two core pulls
• Fig. 2 partly a cross section / a top view of means for preventing rotation of the core pull or the sand sleeve.
• a mold has, in its side wall 1, two slidable core pulls 2 and 3, each with a core holder 7, a pin 9 projecting into the cavity 8 of the mold, both from.
• the pin 9 can be screwed into the core holder 7 by means of a screw pin 15 (core pull 2) or pin 9 and holder 7 can be formed together in one piece (fine pull 3). The sleeve 10 is pushed onto the retracted pin from the mold cavity.
• the core pull 2 or 3 is extended according to the arrow 16, the sand sleeve 10 remaining in the casting.
• the sleeve 10 cannot twist.
• the sleeve 10 must be non-rotatably on the pin 9 and the holder 7 must be retractable and retractable.
• the holder 7 therefore has two longitudinal grooves 17 (core pull 2).
• a non-circular cross-sectional shape would also be possible, e.g. like the square bracket 7a shown in FIG.
• an adhesive for example water glass or dextrin, can connect the sleeve 10 to the pin 9.
• the core pull 3 has a separate water cooling. Water is supplied through a central tube 24 which extends into the free end region of the pin 9. An annular groove 25 is also milled out in the end face of the holder 7, where the sand sleeve 10 abuts, via which core gases are discharged to the outside via a line 26. The core gases can also be drawn off through line 26.
• the core pulls can also be extended and retracted at an angle with respect to the wall 1. It is also possible to produce a continuous, cantilevered cavity in the central region by moving two core pulls 3 according to the invention from one another from opposite walls so that they just touch.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Casting Devices For Molds (AREA)
• Coloring (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4307207

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (8)

Citations (7)

Family Cites Families (6)

• 1979
  • 1979-07-05 CH CH628979A patent/CH640160A5/de not_active IP Right Cessation
• 1980
  • 1980-07-02 WO PCT/CH1980/000076 patent/WO1981000067A1/de not_active Ceased
  • 1980-07-02 JP JP50144180A patent/JPS56500765A/ja active Pending
  • 1980-07-02 AT AT80901145T patent/ATE3758T1/de active
  • 1980-07-02 US US06/243,957 patent/US4462455A/en not_active Expired - Lifetime
  • 1980-07-02 DE DE8080901145T patent/DE3063764D1/de not_active Expired
• 1981
  • 1981-01-26 EP EP80901145A patent/EP0031334B1/de not_active Expired

Patent Citations (7)

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