US3486551A - Casting machine - Google Patents

Casting machine Download PDF

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Publication number
US3486551A
US3486551A US583786A US3486551DA US3486551A US 3486551 A US3486551 A US 3486551A US 583786 A US583786 A US 583786A US 3486551D A US3486551D A US 3486551DA US 3486551 A US3486551 A US 3486551A
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United States
Prior art keywords
mould
casting
station
working
moulds
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Expired - Lifetime
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US583786A
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English (en)
Inventor
Yoshiji Inoue
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.)
KANZAKI KOKYU KOKI Manufacturing Co Ltd
Original Assignee
KANZAKI KOKYU KOKI Manufacturing CO Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/06—Centrifugal casting; Casting by using centrifugal force of solid or hollow bodies in moulds rotating around an axis arranged outside the mould

Definitions

  • the present invention relates to a method and apparatus for centrifugal casting and more especially to the method and apparatus for centrifugal casting having plural number of moulds, enabling the hole mechanisms automatically down extremely easy and, at the same time, the casting continuously down.
  • the present invention has for its object to overcome this disadvantage.
  • a method of centrifugally casting a plurality of workpieces comprising the steps of moving a set of centrifugal casting moulds cyclically in sequence through a number of working stations including a casting station in which a mould is rotated and receives a charge of molten metal, a casting removal station in which the mould is not rotated and the casting is removed and at least one mould conditioning station for preparing the mould for receiving a further charge of metal in the casting station.
  • centrifugal casting apparatus comprising a mould-carrying turret mounted for rotation about its axis, a set of centrifugal casting moulds rotatably mounted in the turret at equal angular spacings and at the same distance from the turret axis, disengageable driving means for selectively rotating each of the moulds, means for periodically rotating the turret in one direction through a predetermined angle so as to move the moulds cyclically in sequence through a set of working stations including a casting station provided with means for pouring a charge of molten metal into a rotating mould, a casting removal station provided with means for disengaging the drive to the mould and for removing the casting from the mould and at least one mould conditioning station for preparing the mould for receiving a further charge of metal at the casting station.
  • the dispersed positions of the castings, cooling, demoulding and conditioning stations such as for scavenging, coating and temperature readjusting enable each operation to be performed efficiently.
  • FIGURE 1 shows a general perspective view of the apparatus with parts broken away
  • FIGURE 2 is a perspective view of a portion not shown in FIGURE 1,
  • FIGURE 3 shows in longitudinal section one mould and its driving mechanism
  • FIGURE 4 is a vertical section of the casting mechanism, 1
  • FIGURE 5 represents a Vertical longitudinal section through the de-moulding mechanism
  • FIGURE 6 shows a vertical longitudinal section through the scavenging mechanism and FIGURE 7 is a vertical longitudinal section through the coating mechanism.
  • the embodiment of the invention shown in the draw is a centrifugal casting machine having six moulds 30 equally angularly spaced at 60 intervals around the axis of a turret formed by a drum 21.
  • the drum 21 is rotatable about its axis and the moulds 30 are moved intermittently through 60 steps by means of a driving mechanism to be described below so that each mould 30 moves cyclically through six working stations A, B, C, D, E, F, in one complete revolution of the drum 21.
  • a working operation is carried out at each working station.
  • the operations are: casting, cooling, de-moulding, scavenging, coating and temperature readjusting.
  • An electric motor 11 drive a main shaft 52 by means of a reduction gear 12, a pulley 51, a belt 13 and a pulley 14 on the main shaft 52.
  • the main shaft 52 carries a sun gear 15 which meshes with'six pinions 17. Power from the main shaft 52 is thus transmitted to the six pinions 17 which are each rotatably mounted a free-moving clutch shaft 16.
  • the pinions 17 rotate continuously.
  • Each clutch shaft 16 carries a side clutch 18 which, when engaged, transmits the rotation of the associated pinion 17 to the clutch shaft 16 so that a pinion 19 fixed to the clutch shaft 16 rotates through the clutch 18.
  • the pinion 19 meshes with a mould-driving gear 20 whose rotation is transmitted to the mould 30 through a mouldmounting frame 53.
  • the six moulds 30 are selectively driven rotationally by engagement of the six side clutches 18 effected by a cam to be described below, so that in the working stations A, B, D, E, F, the moulds 30 rotate while the mould 30 in the working station C does not rotate.
  • the term rotation used herein means a rotation around a stationary axis and therefore it is distinctively used as a revolving circular movement.
  • the main shaft 52 is supported by the frame 22 which also carries the cam 23.
  • Six cam-follower rollers 24 each rotatably mounted on a roller fitted bed 70 engage cam 23.
  • the surface of the cam 23 is not even and thus the push rod 25 moves back and forward in accordance with the said movement of the roller 24.
  • the said dog clutch 18 which relates with the push rod 25 moves back and forward so as to engage or disengage the clutches 18 to start or stop the rotation of the moulds 30.
  • a ratchet wheel 27 coaxial with the drum is fixed to it, a pawl carrier 54 is mounted for rocking movement about the drum axis on the ratchet wheel 27, and a pressure-oil operated ram 26 has a piston rod 55 connected to the pawl carrier 54.
  • the pawl carrier 54 carries a driving pawl 28.
  • the ratchet wheel 27 is also engaged by an anti-reversing pawl (not shown).
  • the drum has six recessed locating bosses 29 spaced at 60 intervals and these recessed bosses are engaged by plungers 48 operated by locating cylinder 56.
  • Each mould-mounting frame 53 supports a back c ver 33 for the mould 30 and the said back cover 33 has a push rod 32 for ejecting the cast product 31 (FIG- URES 1 and 3).
  • the push rod 32 is actuated by the piston 49 of a pneumatic ram 40 mounted on the frame 22.
  • a casting mechanism having a front cover 34, a molten metal weighing vessel 35, a receptacle 37 for molten metal 36 and a channel 38 for molten metal 36.
  • a cooling mechanism having water spray piping 39 for cooling the mould in the working station B.
  • the demoulding mechanism comprising, as described above, the ram operated push rod 32 and a shoot 41 on to which the casting 31 is pushed.
  • a scavenging mechanism comprising a carriage 42 mounted on rails 57, a rotary wire brush 43 carried by the carriage 42 and arranged to rotate against the inner wall of the mould 30 and a vacuum suction system 44.
  • At the working station E (FIGURE 7) is a coating mechanism, a carriage 47 mounted on rails 58, a compressed air nozzle 46, a spray nozzle 45 for coating liquid and a tank 50 containing the coating liquid.
  • a temperature readjusting mechanism having a water spray piping system (not shown in the drawings) for temperature readjustment.
  • the piston rod '55 of the ram 26 starts reciprocating periodically under the action of an oil pressure control mechanism (not shown in the drawings).
  • This periodic reciprocating motion of the piston rod 55 moves the ratchet wheel 27 periodically through steps of 60 in the left direction only (anti-clockwise direction in FIGURE 1) so that the drum 21, being attached to the ratchet wheel 27 moves with it and each mould 30 while making a stop at each of the working stations A, B, C, D, E and F in turn, revolves intermittently.
  • the recessed locating bosses 29 on the said drum 21 are engaged by the locating plungers 48 to position the drums correctly.
  • the Working station A as shown in FIGURE 4 comprises a pouring mechanism for pouring molten metal 36 into the mould 30.
  • the said pouring mechanism is advanced towards the mould 30 by a hydraulic ram and the front cover 34 comes into contact with the mould 30.
  • the front cover 34 rotates in contact with the mould 30.
  • the molten metal weighing ladle 35 tips forward to pour the molten metal 36 in the ladle 35 into the mould 30 through the channel 38 in the receptacle 37.
  • the pouring mechanism is retracted to its original position.
  • the mould 30 moves from the working station B to station C and stays there and, at the same time, its rotation about its axis stops.
  • the casting 31 is then removed from the mould 30 by the push rod 32 actuated by the plunger 49 operated by the air cylinder 40, the back cover 33 pushing the casting 31 out onto the shoot 41.
  • the scavenging mechanism moves forward and the rotating wire brush 43 is inserted into the mould 30 while pushing back the rod 32 which was left in the mould 30 in the previous working step.
  • the rotation of the wire brush 43 coating materials presenting on the inner wall of the mould 30 are dislodged and removed by the vacuum suction device 44.
  • a flange-like passage control body 65 having a slightly smaller diameter than the inner diameter of the mould 30 so that the air-flow speeds are greatly accelerated at around the outer circumference and any particles adhering to the inner wall of the mould 30 come under the powerful influence of the suction force due to the centrifugal force of the rotation of mould 30 and the particles are completely removed through the suction pipe 63.
  • the drum 21 again turns 60 and the mould 30 leaving the working station D moves to the working station E and stays there.
  • a coating mechanism of which, when the mould 30 stops at the station E, the carrier 47 moves forward to wards the mould 30 to hold the spray nozzle 45 in position for coating and the high-pressure air nozzle 46 in the mould 30 so that the coating operation is effected by spraying the mixture of coating material and air on to the inner wall of the mould 30 which is rotating.
  • temperature readjustment is effected by spraying temperature-readjustment water (generally cooling water but pre-heating water) onto the mould as in the same manner as working station B.
  • Centrifugal casting apparatus comprising a mouldcarrying turret mounted for rotation about its axis, a set of centrifugal casting moulds rotatably mounted in the turret at equal angular spacings and at the same distance from the turret axis, disengageable driving means fdr selectively rotating each of the moulds, means for periodically rotating the turret in one direction through a predetermined angle so as to move the moulds cyclically in sequence through a set of working stations including a casting station provided with means for pouring a charge of molten metal into a rotating mould, a casting removal station provided with means for disengaging the drive to the mould and for removing the casting from the mould while stationary and at least one mould eonditioning station for preparing the mould while rotating for receiving a further charge of metal at the casting station.
  • Centrifugal casting apparatus wherein the number of centrifugal casting moulds in the turret is equal to the number of working stations.
  • Centrifugal casting apparatus wherein there are a plurality of mould conditioning stations including a scavenging station with means for removing residues from the internal wall surfaces of the mould and a coating station with means for applying a coating to the internal wall surfaces of the mould.
  • each mould includes an axially movable push rod for ejecting the casting at the casting removal station and the scavenging station includes means for blowing compressed air along the push rod into the mould, means for dislodging residues from the inner wall surfaces of the mould and suction means for removing the material so dislodged.
  • each of the moulds comprises a motor-driven sun gear co-axial with the turret, a pinion for each mould meshing with the sun gear and a clutch for each mould interposed between the pinion and the mould, the said clutches being engageable or disengageable selectively by means of cam followers co-operating with a cam track extending around the axis of the turret.
  • the means for selectively rotating each of the moulds comprises a driven pinion for each mould and a clutch for each mould interposed between the pinion and the mould, the said clutches being selectively engageable or disengageable to rotate a corresponding mould or allow the same to remain stationary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US583786A 1966-07-09 1966-10-03 Casting machine Expired - Lifetime US3486551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4489766 1966-07-09

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US3486551A true US3486551A (en) 1969-12-30

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US (1) US3486551A (pt)
BR (1) BR6683958D0 (pt)
GB (1) GB1158554A (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008843A (en) * 1974-04-29 1977-02-22 Asahi Glass Co., Ltd. Apparatus for sealing tubes
US6367765B1 (en) 1999-09-09 2002-04-09 Klaus A. Wieder Mold vent
CN113145821A (zh) * 2021-04-15 2021-07-23 嘉兴四通车轮股份有限公司 双金属制动鼓离心浇铸生产线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570325A (en) * 1948-02-20 1951-10-09 Dalton Lester Frank Centrifugal casting machine
US2814083A (en) * 1955-01-27 1957-11-26 United States Pipe Foundry Mold coating apparatus
US3164871A (en) * 1961-11-02 1965-01-12 Combustion Eng Centrifugal casting apparatus and the method of making the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570325A (en) * 1948-02-20 1951-10-09 Dalton Lester Frank Centrifugal casting machine
US2814083A (en) * 1955-01-27 1957-11-26 United States Pipe Foundry Mold coating apparatus
US3164871A (en) * 1961-11-02 1965-01-12 Combustion Eng Centrifugal casting apparatus and the method of making the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008843A (en) * 1974-04-29 1977-02-22 Asahi Glass Co., Ltd. Apparatus for sealing tubes
US6367765B1 (en) 1999-09-09 2002-04-09 Klaus A. Wieder Mold vent
US20020100860A1 (en) * 1999-09-09 2002-08-01 Wieder Klaus A. Mold vent and method
US6827569B2 (en) 1999-09-09 2004-12-07 Klaus A. Wieder Mold vent and method
CN113145821A (zh) * 2021-04-15 2021-07-23 嘉兴四通车轮股份有限公司 双金属制动鼓离心浇铸生产线

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Publication number Publication date
GB1158554A (en) 1969-07-16
BR6683958D0 (pt) 1973-02-15

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