US2944308A - Apparatus for filling and ramming foundry flasks - Google Patents

Apparatus for filling and ramming foundry flasks Download PDF

Info

Publication number
US2944308A
US2944308A US670539A US67053957A US2944308A US 2944308 A US2944308 A US 2944308A US 670539 A US670539 A US 670539A US 67053957 A US67053957 A US 67053957A US 2944308 A US2944308 A US 2944308A
Authority
US
United States
Prior art keywords
blade
ramming
blades
rotor
casing
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
US670539A
Other languages
English (en)
Inventor
Beech Austin Sidney
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.)
Foundry Equipment Ltd
Original Assignee
Foundry Equipment 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
Priority claimed from GB2161456A external-priority patent/GB866260A/en
Application filed by Foundry Equipment Ltd filed Critical Foundry Equipment Ltd
Application granted granted Critical
Publication of US2944308A publication Critical patent/US2944308A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/20—Compacting by centrifugal forces only, e.g. in sand slingers

Definitions

  • This invention comprises improvements in or relating to apparatus for filling'and ramming foundry flasks.
  • a ramming head for projecting said into flasks comprises a circular casing, a coaxial rotor therein and at least one impeller blade carried by the rotor the root part of the blade, or of each blade, being clamped to the rotor by releasable clamping means, the operative part projecting outwardly therefrom towards the circular periphery of the casing, the clamping means being such that the blade is adjustable lengthwise to compensate for wear of the free end of the operative rates stem anti-clockwise.
  • the impeller head 15 has' a back flange 20 which rotates close to the back wall 21 of the casing 11 and carries a cylindrical flange 22 enclosing the roots of the ramming blades 16.
  • the flange 22 is slotted to pass the blades 16 andits front edge is close to the front door 13 when the latter is closed.
  • the casing being provided with a lateral inlet for sand close beside the pathof the operative part of the blade or blades and with a peripheral outlet.
  • impeller blades specifically described and as claimed in claim 6 of the said patent slope backwardly with respect to the direction of motion of the rotor.
  • the tips of the blades are curved or bent forwardly, preferably to such an extent that the direction of the face of the blade at the tip is radial to the axis of the impeller. It is found that this materially increases the efficiency of the ramming blades.
  • the preferred section of the blades and the general arrangement of the parts may be such as is described in the aforesaid patent specification No. 2,568,- 536.
  • the blades are bent forwardly at a position which is at some distance from the end of the blade so that as each blade wears away in use and has to be adjusted radially outwards relative to the rotor on which it is mounted, it retains the forward slope of the tip practically for its whole life.
  • Figure 1 is a front elevation of a ramming head, with door open to show the interior;
  • Figure 2 is a side elevation of a blade, removed from the head
  • Figure 3 is a plan of the same
  • Figure 4 is an end elevation of the same, looking at the blade from the left of Figure 2, to a larger scale;
  • Figure 5 is a side elevation of a modification
  • Figure 6 is a plan of the same.
  • Figure 7 is a section upon the line 7-7 of Figure 5, looking in the direction of the arrows.
  • the ramming head comprises a casing 11, lined with abrasion-resistant material 12.
  • casing is short and cylindrical, with a horizontal axis and a hinged front door 13, kept shut in use.
  • Concentric with the casing is a shaft 14 on which is mounted an impeiling head 15 having flat faces to which are secured ramming blades 16 by set screws 17.
  • the head has an inlet chute 18' for moulding sand and a tangential Outlet 19.
  • the direction of rotation of the head 15 is
  • the blades 16 are shapedas shown in' Figures 24 and each comprises a fiat root-portion 23 to fit on one of the fiat'faces of the head 15 and slotted at 24 to pass the set-screw 17.
  • the blade has a sharp knife-shaped edge This edge passes close in front of the inlet-chute 18.
  • the other edge 26 is curved up but not sharpened.
  • the outer end portion of the blade is curved forwardly as shown at 27 so that although the root 23' is sloped rearwardly in relation to the direction of rotation the end portion is'radial, i.e.' at right angles to the pheriphery of the casing 11, as clearly, seen in Figure l.
  • the root 23 carries a tail 28, bent down at 29 and pierced at 30 ( Figure 4) to pass a screwed positioning stud 31, which carries units, 32, 33.
  • the sand being highly abrasive, wears the exposed parts of the blades away, especially at the tip. As wear occurs, the blades are adjusted outwards from time to time by nuts 32, 33 to keep their tips close to the lining 12. Although this makes the ends of the blades come a little further back from the position shown in the drawings, considered relative to the direction of rotation, it does not, with reasonable proportions, as shown, seriously alter the angle of the tip of the blade relatively to the lining so long as part of the forwardly curved portion of the blade remains. When this is gone the blade should be renewed.
  • Figures 5, 6 and 7 show a similar blade but the forwardly bent portion 34 beyond the bend 27 is shorter. This Works quite well and illustrates how, even when working the shape of Figures 2 to 4 remains effective.
  • a ramming head for projecting sand into flasks -c0m prising a circular casing, a coaxial rotor therein, a
  • a ramming head for projecting sand into flasks comprising a circular casing, a coaxial rotor therein, a plurality of substantially straight, narrow channel-shaped impeller blades each of uniform cross-section throughout its entire length and having a straight fiat root portion pe a ef-. e e hta. h amp n me he ein h h.
  • t he heal and he t nt 9f; the ade; h e e e e w rdlw so as e e subs an ial ll/419?; l hee ha d' tt e e hahe haat v tie w h e ateral: et or e e eee eeide the P rt Q he pe e: p t.
  • a hollow rotor coaxial t he ea in and. ha n ts hellew ntet szt aeeeae h e from one side, a plurality of impeller blades on the rotor, each said impeller blade being of rectilinear channel-like form in cross-section and being substantially straight longitudinally and having a forwardly curved tip portion, said rotor being slotted in its periphery to lit the blade and enable itto enter-"theinterior of the rotor but project therefrom toward the periphery of the casing, and a seat- 18: fe db a within o o a d dampin neana vyi.tl:,1- in the hollow, partof; the rotor to hold said blade on said seating, the seating and the portion, of the.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US670539A 1956-07-12 1957-07-08 Apparatus for filling and ramming foundry flasks Expired - Lifetime US2944308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2161456A GB866260A (en) 1949-01-28 1956-07-12 Improvements in or relating to apparatus for filling and ramming foundry flasks

Publications (1)

Publication Number Publication Date
US2944308A true US2944308A (en) 1960-07-12

Family

ID=47108335

Family Applications (1)

Application Number Title Priority Date Filing Date
US670539A Expired - Lifetime US2944308A (en) 1956-07-12 1957-07-08 Apparatus for filling and ramming foundry flasks

Country Status (4)

Country Link
US (1) US2944308A (de)
BE (1) BE559183A (de)
CH (1) CH350764A (de)
FR (1) FR1178719A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589500A (en) * 1969-04-01 1971-06-29 Dale Corp Van Impeller
US5147030A (en) * 1989-08-01 1992-09-15 Van Dale, Inc. Impeller assembly
US5190140A (en) * 1989-08-01 1993-03-02 J-Star Industries Material handling apparatus
US20050039352A1 (en) * 2003-08-20 2005-02-24 Seishu Sakai Snow removing machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309833A (en) * 1919-07-15 Molding apparatus
US1458897A (en) * 1922-06-01 1923-06-12 Stone Joseph Molding machine
US2568536A (en) * 1949-01-28 1951-09-18 Foundry Equipment Ltd Apparatus for filling and ramming foundry flasks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309833A (en) * 1919-07-15 Molding apparatus
US1458897A (en) * 1922-06-01 1923-06-12 Stone Joseph Molding machine
US2568536A (en) * 1949-01-28 1951-09-18 Foundry Equipment Ltd Apparatus for filling and ramming foundry flasks

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589500A (en) * 1969-04-01 1971-06-29 Dale Corp Van Impeller
US5147030A (en) * 1989-08-01 1992-09-15 Van Dale, Inc. Impeller assembly
US5190140A (en) * 1989-08-01 1993-03-02 J-Star Industries Material handling apparatus
US20050039352A1 (en) * 2003-08-20 2005-02-24 Seishu Sakai Snow removing machine
US7174660B2 (en) * 2003-08-20 2007-02-13 Honda Motor Co., Ltd. Snow removing machine

Also Published As

Publication number Publication date
BE559183A (de) 1957-07-31
CH350764A (de) 1960-12-15
FR1178719A (fr) 1959-05-14

Similar Documents

Publication Publication Date Title
US2819562A (en) Centrifugal blasting wheel and blades for use in same
US3768209A (en) Impelling wheel for particulate material
US2944308A (en) Apparatus for filling and ramming foundry flasks
US4065185A (en) Point-attack bit
US2628038A (en) Stationary peg or pulverizer for rotary beater mills
US4030855A (en) Reaming tool
US4174814A (en) Impeller shoe for centrifugal impact rock crushing machine
US2914103A (en) Cutter assembly for meat grinders
US2280836A (en) Blade support for shaving devices
US1604448A (en) Fan
US1608183A (en) Silage filler
US4645390A (en) Cutting tool for making holes
US2109077A (en) Means of mixing a plastic material
JPS6052913B2 (ja) 砥石車用注液装置
US2958240A (en) Method of grinding reliefs on cutters
US2501275A (en) Garbage grinder, including canted rotary cutting elements and canted fixed cutting masks
US2484365A (en) Rock drill bit
US1342240A (en) Cutting-blade for stapling-machines
US578577A (en) Lead-pencil sharpener
US1636577A (en) Rotary cutting tool
US1361305A (en) Cutter instrument for wood-turning lathes
US1996885A (en) Centrifugal device for throwing abrasive
US2246522A (en) Abrading apparatus
US2383335A (en) Trimming tool
US2965059A (en) Spinning tool