US2861301A - Sand blast molding machine - Google Patents

Sand blast molding machine Download PDF

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Publication number
US2861301A
US2861301A US472451A US47245154A US2861301A US 2861301 A US2861301 A US 2861301A US 472451 A US472451 A US 472451A US 47245154 A US47245154 A US 47245154A US 2861301 A US2861301 A US 2861301A
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United States
Prior art keywords
valve
sand
hopper
core box
compressed air
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Expired - Lifetime
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US472451A
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English (en)
Inventor
Haberlin Hans Paul
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Georg Fischer AG
Original Assignee
Georg Fischer AG
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Filing date
Publication date
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Publication of US2861301A publication Critical patent/US2861301A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles

Definitions

  • the present invention overcomes these and other great deficiencies and disadvantages inherent in such known operational steps and has as one of its prime objects to provide means conducive to a considerable simplification in the structure and function of sandblast molding machines.
  • Still a further object of the present invention resides in the provision of means contributing to rapid centering of the valve body, core box, sand hopper and similar parts to be jointed or sealed to thereby reduce necessary manipulating steps of labor or operators to a minimum.
  • Fig. 1 shows a sandblast forming machine embodying the invention as seen in elevation and partly in section.
  • Fig. 2 is a section through the upper upright cap and blast valve shown in a median position of the actuating lever.
  • Fig. 3 is a section similar to that of Fig. 2, showing the valve in one end position of said actuating lever.
  • Fig. 4 is an enlarged fragmentary view of a portion of Fig. 1, shown partly in section.
  • Fig. 5 is an enlarged section taken along lines III-III of Fig. 4.
  • Fig. 6 shows a section similar to that of Fig. 4 with the sand hopper in blasting position.
  • FIG. 7 is an enlarged sectional view of a regulating valve employed in a machine embodying the invention.
  • Fig. 8 is an enlarged, partly sectional view of a core box clamping mechanism employed in a machine embody- .ing the invention.
  • Fig.1 asandblast forming machine S- having Patented Nov. 25, 1958 as an enclosure for compressed air used for blasting purposes.
  • the supply of compressed air is effected through air inlet means 8.
  • a displaceable or shiftable cylinder or sleeve 4 which is provided with air inlet means 5 and has further a cylindrical bore which is open at the lower end into which a valve bushing 7 may slide.
  • a valve or valve cone 9 is suspended from the cylinder 4 at 9a and has a stem 9b coinciding with the longitudinal axis of the displaceable cylinder 4.
  • the sleeve 4, the'bushing 7 and the valve 9 together comprise a valve means whose operation is set forth hereinafter.
  • valve bushing 7 is provided with a valve seat 19 and the displaceable cylinder 4 is provided with a recess or groove 20 into which extends a cam lever with cam piece or member 10 for operating said cylinder 4.
  • Cap or lid 12 closes in an airtight manner the hollow head 18 of the upright.
  • a supporting device 15 for the core box 13 On the molding board or table '14 there is disposed a supporting device 15 for the core box 13. On the core box 13 rests a cylindrical blasting sand hopper 11. The valve bushing 7 may be pressed against the corresponding seat 11a on blasting sand hopper 11 in order to close the upper opening thereof.
  • a cam piece or member 16 Operatively connected with the pivotal hand lever 1 is a cam piece or member 16, which upon swivelling of lever 1 actuates a regulating valve 17, which operates accordingly a piston 21a within cylinder 21 for clamping core box 13 in desired position.
  • Conduit 22 connects the regulating valve 17 with the cylinder 21 for compressed air and conduit 23 connects chamber 3 of the standard with the regulating valve 17.
  • a compressed air operated membrane or diaphragm may be employed.
  • the sandblast forming machine according to Figs. 1 to 3 is operated in the following manner:
  • valve bushing 7 and the cylinder 4 are forced to move apart from each other by the air pressure prevailing inside the bushing, i. e. the valve bushing 7 presses against the valve cone 9.
  • valve bushing 7 is pressed down by the sleeve until the bushing rests against the sand container 11. Only then do parts 4 and 9 move further in order to open the valve 9, admitting air into the sand container for the actual sand-blowing operation.
  • cam 16 In the median position of lever 1, cam 16 is moved to actuate the regulating valve 17.
  • the compressed air passing through conduits 23 and 22 then produces a place.
  • the piston 21a of clamping device 21 presses-support 15 against the core box 13 with a horizontal force. This is best illustrated in Fig. 8.
  • the clamping effect on the core box takes place not only during the first portion of the swinging motion of lever 1, but also during the entire core-blowing operation, in order to keep the core box closed during the inrush of sand into the core box.
  • the sand 24 stored in hopper or receptacle 11 is then forced by the admitted compressed air and with striking impact into the core box 13.
  • Lever 1 is subsequently rctracted to its starting position.
  • valve cone 9 will be automatically closed and the displaceable cylinder 4 lifted to its initial position.
  • Cam 16 thus releases regulating valve 17, so that compressed air may escape from conduit 22 and cylinder 21.
  • the supporting device 15 releases core box 13, as soon as lever 1 has returned to its starting position.
  • the core box 13 and the sand hopper or receptacle 11 may then be removed from the machine, which is thus again readied for a new blasting operation.
  • valve head which is movable and contains the blasting valve
  • a centering closure mechanism for a centered suspension of the sand receptacle is provided with a centering closure mechanism for a centered suspension of the sand receptacle, as more clearly disclosed in Figs. 4 to 6.
  • a sleeve member 39 is fixed by means of Wing screws 4% on the valve head 33 (which corresponds to the valve bushing '7 of Figs. 1 to 3) to form centering means.
  • the coupling of the'sand receptacle 36 with the valve head 33 is efiectuated through pins 41 movably insertable into bayonet slots 42 of sleeve member 39.
  • the present invention permits by the use of centering and sealing means to empty the sand hopper through blasting in the course of several blasting operations, or to only employ for core boxes the sand receptacle once, centering thereof taking place automatically and airtight connection being established between the sand hopper and valve head.
  • the operator has both his hands free after insertion of the sand hopper to carry out other operational steps.
  • the combination centering-closure means permits the removal of the sand receptacle after each blasting operation from the valve head.
  • the sand receptacle will be de-aerated and simultaneously, in the position of rest, a required play between blasting plate and blasting form is afforded.
  • actuation may also be obtained by means of regulatable compressed air.
  • the operating lever forms a regulator acting onto special compressed air valve means. It is desirable that for closing the blasting valve a compression spring be employed.
  • the oscillatable or swingable operating lever maybe actuated by any known compression or electrical means, the release movement thereof being brought about either manually or by means of a foot pedal.
  • the supporting device for the core box may also be electrically actuated.
  • a cam is connected with the swingable lever, which upon swinging movement thereof trips a contact to operate an electro-magnetic device for clamping the core box into desired operative position.
  • a sand blast molding machine comprising a standard and a support thereon, compressed air supply means, compressed air-actuated clamping means located on said support for clamping a core box in position thereon, conduit means interconnecting said supply means and said clamping means, a control valve operatively connected to said conduit means for regulating flow of compressed air from said supply means to said clamping means, a hopper for delivering sand and positionable on said core box when the latter is placed on said support, said hopper being provided with a first opening at its bottom to communicate with the interior of said core box and being further provided with a second opening at its top, valve means comprising a sleeve, 21 valve bushing and a valve carried by said standard for movement toward and away from said hopper when the latter is positioned on said core box, said valve means communicating with said supply means and said valve bushing being adapted when moved toward said hopper to first close said second open ing from the surrounding atmosphere and said valve being then adapted to admit compressed air into said hopper from said supply means, and
  • a machine according toclaim 1 further comprising pin and slot means interconnecting said valve means and said hopper, whereby said hopper is retained in centered alignment with said valve means and said core box when the latter is located on said support, said pin and slot means simultaneously permitting predetermined relative movement between said valve means and said hopper when the latter is positioned on said core box.
  • a sand blast molding machine comprising a standard, a chamber in said standard for supplying compressed air, supporting means on said standard, clamping means on said supporting means and constructed for actuation by compressed air to clamp a core box in position when said core box isplaced on said supporting means, a sand hopper having inlet and outlet openings, said outlet opening communicating with said core box when the latter is on said supporting means, valve means including a valve and a displaceable valve bushing on said standard, said valve bushing being adapted to close and open said inlet opening with respect to the surrounding atmosphere, said valve being adapted to permit admission of compressed air from said chamber to said hopper when said inlet opening is closed by said valve bushing and said valve is open, conduit means interconnecting said chamber and said clamping means, a control valve in said conduit means for regulating the fiow of compressed air therethrough, said control valve including an operating element, and single actuating means movably mounted on said standard and in mechanical engagement with said operating element of said control valve and with said valve bushing of said valve means to sequential
  • valve bushing to thereby close said inlet open ing, and finally said valve to open the same, said valve means and saidcl mping means eing r turned to. respec tive starting positions, successively, when said actuating means is returned to its starting position.
  • a machine according to claim 3 further including pin and slot means interconnecting said hopper with said valve bushing for centering said hopper with respect to said valve means and said core box.
  • a core-blowing machine comprising a standard, a support thereon for a core box, compressed air supply means, compressed air-actuated clamping means located on said support for clamping said core box in position thereon, conduit means interconnecting said supply means and said clamping means, a control valve operatively connected to said conduit means for regulating flow of compressed air from said supply means to said clamping means, a hopper for delivering sand and positionable on said core box when the latter is placed on said support, said hopper being provided with a first opening at its bottom to communicate with the interior of said core box and being further provided with a second opening at its top, valve means comprising a sleeve, a valve bushing and a valve carried by said standard for movement toward and away from said hopper when the latter is positioned on said core box, said valve means communicating with said supply means and said valve bushing being adapted when moved toward said hopper to first close said second opening from the surrounding atmosphere and said valve being then adapted to admit compressed air into said hopper from said supply means, and means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US472451A 1953-12-05 1954-12-01 Sand blast molding machine Expired - Lifetime US2861301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH764098X 1953-12-05

Publications (1)

Publication Number Publication Date
US2861301A true US2861301A (en) 1958-11-25

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ID=4534900

Family Applications (1)

Application Number Title Priority Date Filing Date
US472451A Expired - Lifetime US2861301A (en) 1953-12-05 1954-12-01 Sand blast molding machine

Country Status (4)

Country Link
US (1) US2861301A (fr)
CH (2) CH316853A (fr)
FR (1) FR1114133A (fr)
GB (1) GB764098A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747665A (en) * 1971-06-04 1973-07-24 G Taburinsky Sand-blowing machine
US8397745B2 (en) 2007-02-12 2013-03-19 Colt Irrigation, LLC Fluid activated flow control apparatus
US9341281B2 (en) 2007-02-12 2016-05-17 Colt Irrigation Llc Fluid activated flow control apparatus
US9599286B2 (en) 2014-01-23 2017-03-21 Colt Irrigation, LLC Fluid activated flow control apparatus
US10088849B2 (en) 2014-01-23 2018-10-02 Colt Irrigation, LLC Fluid activated flow control apparatus
CN109604535A (zh) * 2019-01-10 2019-04-12 盐城市大丰澳滨铸造有限公司 一种泥芯机以及其操作方法
US10571937B1 (en) 2014-01-23 2020-02-25 Colt Irrigation, LLC Valve control apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1000255A (en) * 1961-05-17 1965-08-04 Atomic Energy Authority Uk Improvements in or relating to the hot pressing of solid bodies from powder
DE3725177C2 (de) * 1986-08-12 1997-02-13 Arana Erana Agustin Schießkopf für eine Gießkernschießmaschine
FR2643000B2 (fr) * 1986-08-12 1993-03-19 Erana Agustin Arana Mecanisme de projection pour machines a projeter des noyaux de fonderie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE543832C (de) * 1931-02-06 1932-02-15 Masch U Werkzeugfabrik Kabel Sandblaseformmaschine
DE549630C (de) * 1930-07-12 1932-04-29 Masch U Werkzeugfabrik Kabel Sandblaseformmaschine
US1994028A (en) * 1929-12-16 1935-03-12 Osborn Mfg Co Molding apparatus
US2468672A (en) * 1946-05-03 1949-04-26 Western Hardware & Specialty M Core blower

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1994028A (en) * 1929-12-16 1935-03-12 Osborn Mfg Co Molding apparatus
DE549630C (de) * 1930-07-12 1932-04-29 Masch U Werkzeugfabrik Kabel Sandblaseformmaschine
DE543832C (de) * 1931-02-06 1932-02-15 Masch U Werkzeugfabrik Kabel Sandblaseformmaschine
US2468672A (en) * 1946-05-03 1949-04-26 Western Hardware & Specialty M Core blower

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747665A (en) * 1971-06-04 1973-07-24 G Taburinsky Sand-blowing machine
US8397745B2 (en) 2007-02-12 2013-03-19 Colt Irrigation, LLC Fluid activated flow control apparatus
US9341281B2 (en) 2007-02-12 2016-05-17 Colt Irrigation Llc Fluid activated flow control apparatus
US9841769B2 (en) 2007-02-12 2017-12-12 Colt Irrigation Llc Fluid activated flow control apparatus
US9599286B2 (en) 2014-01-23 2017-03-21 Colt Irrigation, LLC Fluid activated flow control apparatus
US10088849B2 (en) 2014-01-23 2018-10-02 Colt Irrigation, LLC Fluid activated flow control apparatus
US10571937B1 (en) 2014-01-23 2020-02-25 Colt Irrigation, LLC Valve control apparatus
CN109604535A (zh) * 2019-01-10 2019-04-12 盐城市大丰澳滨铸造有限公司 一种泥芯机以及其操作方法
CN109604535B (zh) * 2019-01-10 2024-02-20 盐城市大丰澳滨铸造有限公司 一种泥芯机以及其操作方法

Also Published As

Publication number Publication date
CH320829A (de) 1957-04-15
GB764098A (en) 1956-12-19
CH316853A (de) 1956-10-31
FR1114133A (fr) 1956-04-09

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