CA1040833A - Apparatus for shifting trough of centrifugal casting machine - Google Patents
Apparatus for shifting trough of centrifugal casting machineInfo
- Publication number
- CA1040833A CA1040833A CA236,792A CA236792A CA1040833A CA 1040833 A CA1040833 A CA 1040833A CA 236792 A CA236792 A CA 236792A CA 1040833 A CA1040833 A CA 1040833A
- Authority
- CA
- Canada
- Prior art keywords
- trough
- support plate
- suspension member
- upright suspension
- upright
- 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
Links
Classifications
-
- 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
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
Abstract
ABSTRACT
A trough shifting mechanism is provided, for a centri-fugal casting machine of the retraction casting type, suspended by hinged members attached to elevated support members. The mechanism is suspended in such a manner as to offer stability for mounting one or more troughs or for mounting a trough and a spray lance. All shifter tracks, wheels or slide Ways are eliminated and the shifting actuator may be a cylinder, rack and pinion or other similar device. Apparatus for dumping the trough may also be provided.
A trough shifting mechanism is provided, for a centri-fugal casting machine of the retraction casting type, suspended by hinged members attached to elevated support members. The mechanism is suspended in such a manner as to offer stability for mounting one or more troughs or for mounting a trough and a spray lance. All shifter tracks, wheels or slide Ways are eliminated and the shifting actuator may be a cylinder, rack and pinion or other similar device. Apparatus for dumping the trough may also be provided.
Description
-lQ4~g33 The present invention relates to apparatus for shift- -ing the pouring trough of centrifugal casting machines of the retraction casting type for casting pipe tubes and the like and, more specifically, tG apparatus for shifting the longi-tudinal pouring trough of a centrifugal casting machine of the deLavaud type.
Such apparatus have been well known in the art for many years and are generally referred to a~ trough shifters.
Due to the environment in which such apparatus must operate, it is difficult to prevent malfunctions. Generally, trough shifter apparatus are located ~ust beneath the machine ladle and the trough chute into which the machine ladle pour~ molten metal and are usually operated by fluid power devices. Many tons of iron are poured each day from a transfer ladle into the machine ladle and then from the machine ladle into the trough chute. Due to various reasons molten metal is spilled or splashed in such manner as to cause unusual wear, uneven movement and occasionally complete failure of the shifter mechanism. Splash guards and covers have been devised and offer protection; however, such means prevent access for in-spection and maintenance. The problem is further aggravated by the necessity to rake or skim slag from the machine ladle and the need to pour a liquid refractory on the trough chute.
This refractory is also spilled or splashed in such a manner ;
as to find its way onto the rollers, rails or slidewsys of the known shifting apparatus. Various scrapers and wipers have been employed to automatically clean the running surfaces of rails or slideways and such have proven partially effective.
However, malfunctions continue to occur interrupting produc-tion and at times requiring the entire casting machir.e to be taken out of service since control switches are actuated by --1-- ' ~ .
.
104~33 the shifting apparatus as it changes position. These control switches must, for successful operation, function flawlessly;
however, of necessity, they are in the same environment.
Thus, malfunctions occur also due to spilled or splashed mol-ten metal, slag or refractory damaging these control switches.
Besides causing interruptions to the operation of the casting machine, the above described maladies cause an erratic or rough travel of the shifter causing the cantilevered troughs or lance to wave severely. This waving can result in im-proper flow of the molten melt down the trough, splashing ofthe metal as it e~its the trough onto the mold and in some cases destruction of the trough due to hitting the mold or machine.
The present invention is directed to an apparatus for shifting the trough of a centrifugal casting machine of the retraction casting type, including an elevated support member, at least one upright suspension member hingedly con-nected at its upper end to said elevated supported member and suspended therefrom, a support plate hingedly connected to the lower end of said upright suspension member, at least one trough attached to said support plate, and means for recipro-cating said upright suspension member to move said trough from a first to a second position.
A further preferred form of the means provides whereby the operating mechanism including control switches ~--and valves are conveniently located in such a manner that they are not affected by spills or splashes of molten metal, - -slag or refractory. Overall the apparatus is simple and easily maintained. Fur~er, complete access to the control valves, switches and actuating mechanism is provided even dur-
Such apparatus have been well known in the art for many years and are generally referred to a~ trough shifters.
Due to the environment in which such apparatus must operate, it is difficult to prevent malfunctions. Generally, trough shifter apparatus are located ~ust beneath the machine ladle and the trough chute into which the machine ladle pour~ molten metal and are usually operated by fluid power devices. Many tons of iron are poured each day from a transfer ladle into the machine ladle and then from the machine ladle into the trough chute. Due to various reasons molten metal is spilled or splashed in such manner as to cause unusual wear, uneven movement and occasionally complete failure of the shifter mechanism. Splash guards and covers have been devised and offer protection; however, such means prevent access for in-spection and maintenance. The problem is further aggravated by the necessity to rake or skim slag from the machine ladle and the need to pour a liquid refractory on the trough chute.
This refractory is also spilled or splashed in such a manner ;
as to find its way onto the rollers, rails or slidewsys of the known shifting apparatus. Various scrapers and wipers have been employed to automatically clean the running surfaces of rails or slideways and such have proven partially effective.
However, malfunctions continue to occur interrupting produc-tion and at times requiring the entire casting machir.e to be taken out of service since control switches are actuated by --1-- ' ~ .
.
104~33 the shifting apparatus as it changes position. These control switches must, for successful operation, function flawlessly;
however, of necessity, they are in the same environment.
Thus, malfunctions occur also due to spilled or splashed mol-ten metal, slag or refractory damaging these control switches.
Besides causing interruptions to the operation of the casting machine, the above described maladies cause an erratic or rough travel of the shifter causing the cantilevered troughs or lance to wave severely. This waving can result in im-proper flow of the molten melt down the trough, splashing ofthe metal as it e~its the trough onto the mold and in some cases destruction of the trough due to hitting the mold or machine.
The present invention is directed to an apparatus for shifting the trough of a centrifugal casting machine of the retraction casting type, including an elevated support member, at least one upright suspension member hingedly con-nected at its upper end to said elevated supported member and suspended therefrom, a support plate hingedly connected to the lower end of said upright suspension member, at least one trough attached to said support plate, and means for recipro-cating said upright suspension member to move said trough from a first to a second position.
A further preferred form of the means provides whereby the operating mechanism including control switches ~--and valves are conveniently located in such a manner that they are not affected by spills or splashes of molten metal, - -slag or refractory. Overall the apparatus is simple and easily maintained. Fur~er, complete access to the control valves, switches and actuating mechanism is provided even dur-
-2-.
~Q4~,33 ing operation of the casting machine. Also, should a trough dumping mechanism be desired, it may be mounted on the shifter and the control valves and switches mounted along with the shifter controls.
Figure 1 is an elevation view looking parallel to the longitudinal axis of the trough.
Figure 2 is a partial elevation view looking 90 de-grees to the longitudinal axis of the trough~
Figure 3 is an elevation view looking parallel to the longitudinal axis of the trough and showing an alternate embodiment.
The present invention can be better understood by referring to the drawings and, in particular, Figure 1. Ap-plicant's trough shifter is suspended from beams 10 by means o~ brackets 12 attached thereto and hinge pins 14 inserted in-to holes provided in the brackets and pins 14 further extend-ing through tubular members 16 (shown in Figure 2) to which upright members 18 have been welded. The hinge pins 14 are held axially by snap rings 20. At the lower extremity of up-right members 18 and welded thereto are tubular members 22(shown in Figure 2) through which hinge pins 24 extend. Hinge pins 24 also extend through brackets 26 and are held axially by snap rings 20. Brackets 26 are welded to support plate 28 upon which troughs 30 and 31 are mounted in a conventional manner well known to those familiar with the art. An air or hydraulic cylinder 34 is trunnion mounted opposite each of two uprights 18. The cylinder rod is attached to the nearest upright 18 in such a manner that actuation of the cylinder swings the uprights 18 and thus the support plate 28 and all it supports to and fro much like a swing. Since it is impor-tant that the troughs 30 and 31 be positioned properly each
~Q4~,33 ing operation of the casting machine. Also, should a trough dumping mechanism be desired, it may be mounted on the shifter and the control valves and switches mounted along with the shifter controls.
Figure 1 is an elevation view looking parallel to the longitudinal axis of the trough.
Figure 2 is a partial elevation view looking 90 de-grees to the longitudinal axis of the trough~
Figure 3 is an elevation view looking parallel to the longitudinal axis of the trough and showing an alternate embodiment.
The present invention can be better understood by referring to the drawings and, in particular, Figure 1. Ap-plicant's trough shifter is suspended from beams 10 by means o~ brackets 12 attached thereto and hinge pins 14 inserted in-to holes provided in the brackets and pins 14 further extend-ing through tubular members 16 (shown in Figure 2) to which upright members 18 have been welded. The hinge pins 14 are held axially by snap rings 20. At the lower extremity of up-right members 18 and welded thereto are tubular members 22(shown in Figure 2) through which hinge pins 24 extend. Hinge pins 24 also extend through brackets 26 and are held axially by snap rings 20. Brackets 26 are welded to support plate 28 upon which troughs 30 and 31 are mounted in a conventional manner well known to those familiar with the art. An air or hydraulic cylinder 34 is trunnion mounted opposite each of two uprights 18. The cylinder rod is attached to the nearest upright 18 in such a manner that actuation of the cylinder swings the uprights 18 and thus the support plate 28 and all it supports to and fro much like a swing. Since it is impor-tant that the troughs 30 and 31 be positioned properly each
-3-' ~04(,;~33 time the shifter moves, an ad~ustable stop mechanism 36 is pro-vided. It is preferred to limit the stroke of the cylinder on the in stroke and mount the cylinder such that the full out stroke is used. However, should it be more convenient ad~ust-able stops can be employed in both directions. Also, a single cylinder attached to only one upright 18 or to support plate 28 may be used in place of the preferred two cylinders 34 de-scribed above. A limit switch 38 is actuated by limit switch striker 40 which is attached to one upright 18 and thus moves 10 to and fro with the upright. This limit switch 38 signals a control valve 42 for cylinders 34. The cylinders 34, control valve 42 and limit switch 38, along with piping and wiring, are protected by providing a sturdy enclosure 44. The enclo-sure also provides room for other valves controlling other mechanisms of the casting machine as well as an anchoring point for beams 10. The enclosure 44 may be provided with an access door and other desired conveniences not a part of the present invention.
In an alternate embodiment as shown in Figure 3, 20 uprights 18 are placed closer together and support plate 28 cantilevered beyond one pair of uprights 18 with lance 32 be s tween the uprights and trough 30 attached to the cantilevered portion of support plate 28. Such an arrangement offers more clearance above the trough for overhead crane service and shortens the cantilevered portion of beams lOo , . ~
The shifter mechanism is so located that in the un- -shifted position trough 30 is directly in line with machine ladle 46 and support plate 28 is substantially horizontal.
In operation the troughs 30 and 31 are aligned ~ith 30 the mold 48 or, if a spray lance is being used, trough 30 and lance 32 are aligned with the mold 48. The mold 48 is posi-. . . . .
. ' ' ' ',;; '' ' ' 'I ' ' ' tl.oned in front of the upwardly curvi.ng portion of trough 30 and molten metal from machine ladle 46 is dumped into the trough 30. The mold 48 is rotated and metal from trough 30 pours onto the rotati.ng mold 48 which is retrac.ted from the trough which distributes molten metal along the length of the moldO When sufficient metal has been poured~ the ma~hine ladle ceases to pour and the metal poured runs down the trough with the except.i.on of a very small portion whlch soll.difies in the trough. This solidif~ed portion called a "splinter" should be removed prior to casting agaln in the moldO Removal may be accomplished by mechanically rotating the trough to an inverted position or by manually picking out the splinter~ In ei.ther case the time required for removlng the splinter and perform-ing any other required trough preparation can delay any sub- -sequent cast. Thus, the first used trough is shifted clear of the machine travel and the second trough is shifted into align ~`. .
ment with the mold, thus allowing a subsequent cast to com-mence without delay due to trough preparationO
While the preferred embodiment and an alternate of the invention have been described, i.t is not intended that the invention be limited to the details shownO Various modifica- .
tions of structure and operating procedure will be obvious to those skilled in the art and m~y be made without departing .:
from the scope of the following claimsO
: ~ :
~5--.
In an alternate embodiment as shown in Figure 3, 20 uprights 18 are placed closer together and support plate 28 cantilevered beyond one pair of uprights 18 with lance 32 be s tween the uprights and trough 30 attached to the cantilevered portion of support plate 28. Such an arrangement offers more clearance above the trough for overhead crane service and shortens the cantilevered portion of beams lOo , . ~
The shifter mechanism is so located that in the un- -shifted position trough 30 is directly in line with machine ladle 46 and support plate 28 is substantially horizontal.
In operation the troughs 30 and 31 are aligned ~ith 30 the mold 48 or, if a spray lance is being used, trough 30 and lance 32 are aligned with the mold 48. The mold 48 is posi-. . . . .
. ' ' ' ',;; '' ' ' 'I ' ' ' tl.oned in front of the upwardly curvi.ng portion of trough 30 and molten metal from machine ladle 46 is dumped into the trough 30. The mold 48 is rotated and metal from trough 30 pours onto the rotati.ng mold 48 which is retrac.ted from the trough which distributes molten metal along the length of the moldO When sufficient metal has been poured~ the ma~hine ladle ceases to pour and the metal poured runs down the trough with the except.i.on of a very small portion whlch soll.difies in the trough. This solidif~ed portion called a "splinter" should be removed prior to casting agaln in the moldO Removal may be accomplished by mechanically rotating the trough to an inverted position or by manually picking out the splinter~ In ei.ther case the time required for removlng the splinter and perform-ing any other required trough preparation can delay any sub- -sequent cast. Thus, the first used trough is shifted clear of the machine travel and the second trough is shifted into align ~`. .
ment with the mold, thus allowing a subsequent cast to com-mence without delay due to trough preparationO
While the preferred embodiment and an alternate of the invention have been described, i.t is not intended that the invention be limited to the details shownO Various modifica- .
tions of structure and operating procedure will be obvious to those skilled in the art and m~y be made without departing .:
from the scope of the following claimsO
: ~ :
~5--.
Claims (7)
1. An apparatus for shifting the trough of a centri-fugal casting machine of the retraction casting type, including an elevated support member, at least one upright suspension member hingedly connected at its upper end to said elevated supported member and suspended therefrom, a support plate hing-edly connected to the lower end of said upright suspension mem-ber, at least one trough attached to said support plate, and means for reciprocating said upright suspension member to move said trough from a first to a second position.
2. An apparatus according to claim 1, in which said support plate also has at least one lance attached thereon.
3. An apparatus according to claim 1, wherein an equipment enclosure is provided adjacent said apparatus, and said reciprocating means is partially located within said en-closure.
4. An apparatus according to claim 1, in which said support plate has an adjustable stop associated therewith to assure proper positioning of said trough in movement from the first to the second position.
5. An apparatus according to claims 3 and 4, wherein the adjustable stop is mounted on said support plate and is adapted to abut a portion of said equipment enclosure.
6. An apparatus for shifting the trough of a centri-fugal casting machine of the retraction casting type, including an elevated support member, at least one upright suspension member hingedly connected at its upper end to said elevated support member and suspended therefrom, a support plate hinged-ly connected to the lower end of said upright suspension member, at least one trough attached to said support plate, means for reciprocating said upright suspension member to move said trough from a first to a second position, and an equipment enclosure disposed adjacent said apparatus, said reciprocating means including fluid motor means disposed within said enclo-sure and having an operating element extending out of said en-closure for connection to said upright suspension member;
fluid control means disposed within said enclosure for control-ling the operation of said fluid motor means, and a striker element mounted on said upright suspension member and extending into said enclosure for cooperation with said control means.
fluid control means disposed within said enclosure for control-ling the operation of said fluid motor means, and a striker element mounted on said upright suspension member and extending into said enclosure for cooperation with said control means.
7. An apparatus according to claim 6, wherein the support plate has an adjustable stop member thereon adapted to abut a portion of said equipment enclosure to assure proper positioning of said trough in movement from the first to the second position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US519260A US3915356A (en) | 1974-10-30 | 1974-10-30 | Casting machine trough shifting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1040833A true CA1040833A (en) | 1978-10-24 |
Family
ID=24067523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA236,792A Expired CA1040833A (en) | 1974-10-30 | 1975-10-01 | Apparatus for shifting trough of centrifugal casting machine |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3915356A (en) |
| JP (1) | JPS5910865B2 (en) |
| BR (1) | BR7507069A (en) |
| CA (1) | CA1040833A (en) |
| DE (1) | DE2547365C2 (en) |
| EG (1) | EG11956A (en) |
| FR (1) | FR2289277A1 (en) |
| IN (1) | IN144293B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2415504A1 (en) * | 1978-01-27 | 1979-08-24 | Pont A Mousson | ADJUSTABLE SUPPORT FOR A POWER SUPPLY ASSEMBLY FOR A CENTRIFUGAL PIPE CASTING MACHINE |
| DE4244928C2 (en) * | 1992-12-14 | 1998-08-27 | Herbst Bremer Goldschlaegerei | Centrifugal casting installation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE480204C (en) * | 1926-10-05 | 1929-07-30 | Halbergerhuette G M B H | Device for moving the pouring chute and the filling funnel of centrifugal casting machines |
| DE628041C (en) * | 1934-10-04 | 1936-03-28 | Eisenwerke Akt Ges Deutsche | Casting channel for the production of hollow centrifugal cast bodies |
| US3334683A (en) * | 1964-07-17 | 1967-08-08 | United States Pipe Foundry | Trough shifting and dumping apparatus |
| FR1492039A (en) * | 1966-02-07 | 1967-08-18 | Ct De Rech S De Pont A Mousson | Trolley for centrifugal casting machine and machine with application |
| US3522837A (en) * | 1967-04-20 | 1970-08-04 | Canada Iron Foundries Ltd | Centrifugal pipe casting |
-
1974
- 1974-10-30 US US519260A patent/US3915356A/en not_active Expired - Lifetime
-
1975
- 1975-10-01 CA CA236,792A patent/CA1040833A/en not_active Expired
- 1975-10-03 IN IN1898/CAL/75A patent/IN144293B/en unknown
- 1975-10-13 FR FR7531296A patent/FR2289277A1/en active Granted
- 1975-10-20 DE DE2547365A patent/DE2547365C2/en not_active Expired
- 1975-10-27 EG EG637/75A patent/EG11956A/en active
- 1975-10-29 BR BR7507069*A patent/BR7507069A/en unknown
- 1975-10-29 JP JP50129415A patent/JPS5910865B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IN144293B (en) | 1978-04-22 |
| US3915356A (en) | 1975-10-28 |
| FR2289277A1 (en) | 1976-05-28 |
| EG11956A (en) | 1979-03-31 |
| FR2289277B1 (en) | 1980-02-08 |
| JPS5910865B2 (en) | 1984-03-12 |
| JPS5167225A (en) | 1976-06-10 |
| DE2547365A1 (en) | 1976-05-06 |
| BR7507069A (en) | 1976-08-17 |
| DE2547365C2 (en) | 1984-10-11 |
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