US1690354A

US1690354A - Centrifugal casting machine

Info

Publication number: US1690354A
Application number: US212477A
Authority: US
Inventors: John O Wishart
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-08-12
Filing date: 1927-08-12
Publication date: 1928-11-06
Anticipated expiration: 1945-11-06

Description

Nov. 6, 1928. 1,690,354

J. o. WISHART CENTRIFUGAL CASTING MACKINE Filed Aug. i2, 192v 2 Sheets-Sheet IN VEN TOR.

BY Q [014M Km; a VMA.

A TTORNE Y.

Patented Nov: 6, 1928.

UNITED STATES JOHN O. WISnBT, OF MILWAUKEE, WISCONSIN.

omwrmueax. cAs'rmo MACHINE:

Application'fled August 12, 1927. Serial No. 212,477.

wherein the revoluble molds are mounted" upon a vertically disposed rotatable carrier which is given an intermittent motion as the molds move from a charging to a discharging position, and to provide a charging spout movable into and out of registry with the mold in its charging position.

A further object of the invention is to provide a simple and eflicient drive for rotating the molds during their travel ,from a charging to a. discharging position.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof. H

In the drawings Fig. 1 is a side elevation view of a casting machine embodying the invention, parts being broken away and parts being shown in section; v

Fig. 2 is a front end view of the machine; Fig. 3 is a sectional view taken on the line I 33 of Fig. 1;

Fi 4 is a detail sectional view of an adjusta le mold.

Fi 5 is a sectional view of another mold.

Re erring to the drawings, the numeral 5 designates the main frame of the machine in which'a shaft or arbor 6 is journalled, having a vertically disposed platen or carrier mounted thereon at each end.

Each carrier 7 has a plurality of radially arranged, horizontally disposed, tubular shaft supports 8 secured thereto, as by bolts 9, and a shaft 10 is journalled in each of said supports and carries a pulley 11 at its inner end.

The outer end 12 of each shaft 10 is threaded to receive the threaded opening of a flanged face plate 13 to which a mold 14 is secured in any suitable manner. As shown each mold .14 has a fla'n e 15 secured to the flange of the plate 13 by Its 16, the plate 13 having a centering recess 15 into which a part of said flan e 15' fits. Each mold is in the form of a straight tube 17 for plain bushings or a flan ed tube 17 for flanged bushings projecting rom the flanged base 15 which has a small centrally disposed opening 18 alined with a bore 19 in'the shaft 10 to permit gases to escape. The interior diameter of the mold determines the outer cast diameter of the bushng but this diameter may be varied, as shown in Fig. 4, by the insertion of a tubular liner 20 so that a single mold with liners of different thicknesses may be used to produce several sizes of bushings.

The rotation of the shaft 6 will, of course, rotate the carriers 7 and this may be accomp-llshed either by power or by hand-turning of one of the carriers. During charging it is desirable to hold the carriers in a fixed position and for this purpose I have provided a detent locking mechanism for each carrier. Each locking mechanism comprises a detent 21 pivoted at 22 and engageable at its free end with one of a series of spaced lugs 23 on the carrier when said carrier is in pouring or charging position, said detent having a weight 24 urging its free end toward said carrier and being released by the operators operation of a foot pedal 25 pivoted at 26 and operatively connected to the weighted end of the detentby a pin 27.

During the casting operation the molds 14 are constantly rotated by adrive mechanism associated with the pulleys 11 of each carrier. This mechanism includes a. belt 28 running over a drive pulley 29, a guide pulley 30, and successively running over several of the pulleys 11, for example, four of these pulleys during their travel through approximately one-half of a revolution of the carrier. Each drive pulley 29 may be driven in any suitable manner and is shown as mounted on a shaft 31which is driven from an electric motor 32 by a belt drive including the motor shaft pulley 33, belt 3i and pulley 35 on the shaft 31. Thus, for about a half a revolution of the carrier a. series of molds are being continuously rotated and as the carrier is shifted empty molds come under the action of the belt 28 and filled molds move outof range of the belt and may be removed for stripping of the casting therefrom.

The metal to be cast is poured into the molds at the charging station, designated by A, and the cast bushing is removed from the mold at a discharging station designated by B, while between these stations on the lower run of the carrier the empty molds are attached to the carrier. For pouring the molten metal into the molds a spout 36, having a trough-shaped end 37 adapted to enter into the mold cavity and provided with a centering device in the form of a ring 38 having a flange 39 whose outer periphery has a close fit with the wall of the mold cavity, is used. This spout 36 is mounted on an upright- 40 secured to a rectangular rod 41 slidably mounted and guided in brackets 42 secured to a pedestal or support 43, said rod 41 having a handle 44 for facilitating its movement into and out of Charging position.

lVith this construction, with the motor 32 running and the spout 36 moved to charging position in register with one of the then rotating molds at station A, the molten metal, suflicient to form the bushing, is poured from a ladle or other suitable device into the spout 36 and flows through its trough into the interior of the mold, and due to centrifugal force it is thrown against the inner wall of the mold and assumes a tubular shape and during the passage from this station to the discharging station B the metal solidifies and becomes set so that the cast bushing may then be removed from the mold. As soon as one of the molds is charged the spout 36 is withdrawn and the operator releases the detent 21 by pressure upon the foot pedal 25 and then turns the carrier 7 to a position where the detent engages the next roje'ction 23 which brings an empty mold into charging position. The operations of charging the newly presented mold are then repeated and in this way the molds on the carrier are successively charged, it being noted that the present machine has two carriers so that charging of molds by operators at each end of the machine is taking place and a single motor serves to rotate the molds of both carriers.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is:

1. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, of a pluralit of substantially horizontally disposed mol s mounted on said carrier, said carrier having a charging position in which said molds are successively charged and a discharging position, means for rotating said molds during their advance from charging to discharging position, and means movable relative to the carrier for charging each mold.

2. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, a plurality of radially arranged, horizontally disposed, rotatable shafts mounted on said carrier and provided with pulleys, a mold associated with each of said shafts, and a power transmission belt engageable with the pulleys of said shafts to rotate said molds during the time the molds move with the carrier from a charging to a discharging position.

3. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, of a plurality of substantially horizontally disposed molds mounted on said carrier, means for rotating said molds during the casting operation, and a spout adapted to be moved to enter a mold when in a charging position and provided with means engageahle with the inner wall of the mold to center the same during the charging operation.

4:. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, of a plurality of substantially horizontally disposed molds mounted on said carrier, means for rotating said molds, a spout adapted to move horizontally to a mold-entering position, and means for supporting and guiding said spout in its movements into and out of charging position.

5. In a centrifugal casting machine, the combination with a rotatable shaft, of a pair of spaced carriers mounted thereon, each carrier provided with a plurality of radially arranged, horizontally disposed, rotatable shafts provided with pulleys, a mold associated with each of said radially arranged shafts, a power transmission belt respectively engageable with the pulleys of said shafts of each carrier to rotate said molds during the time the molds move with the carriers from a charging to a discharging position, and a single source of power for driving both of said belts.

6. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, of a plurality of substantially horizontally disposed molds mounted on said carrier, said carrier having a charging position in which said molds are successively charged, means for rotating said molds during the casting operation, means for successively charging said molds, and means under the control of the operator for automatically locking the carrier against advancing when each mold is in its charging position.

7. In a centrifugal casting machine, the combinaton with a vertically disposed rotatable carrier, of a plurality of substantially horizontally disposed molds mounted on said carrier, said carrier having a charging position in which the molds are successively charged, means for rotating the molds during the casting operation, means for succes sively charging said molds, indexing projections on said carrier, and an operator-controlled detent successively engageable with said projections as the carrier advances the molds to successively hold said carrier in a charging position.

8. In av centrifugal casting machine, the combination of a rotatable mold, means for rotating the mold, and a spout adapted to be moved into the open end of the mold and provided with a flange having a center portion projecting into and alined with the inner wall of the mold to center the same during the charging operation.

9. In a centrifugal castin combination with a verticali g disposed rotatable carrier, or a plurality of substantially horizontally disposed molds mounted on said carrier, means for rotating the carrier, means for successively charging the molds, and means for rotating the molds during chargmg.

10. In a centrifugal casting machine, the combination with a vertically disposed rotatable carrier, of a plurality of horizontally disposed molds mounted on said carrier, means for simultaneously rotating the molds as they move with the carrier during a part of its complete revolution, and means for successively charging the molds during their rotating period. v

11. In a centrifugal casting machine, the combination'wit-h a vertically disposed rotatable carrier, of a plurality of horizontally disposed molds projecting from one face of said carrier, shafts on which said molds are respectively mounted, drive means on said shafts pro ecting from the opposite face of the carrier whereby to rotate the molds during a portion of a revolution of the carrier, and means for successively charging the molds.

12. In a centrifugal casting machine, the combination with a vertically-disposed r0- machine, the

tatable carrier, a plurality of horizontally disposed rotatable shafts mounted on said carrier, automatically releasable driving means associated with said shafts for rotating said molds during a portion of the movement of the carrier, and means for charging the molds.

13. In a centrifugal casting machine, the combination with a rotatable shaft, of a pair of spaced carriers mounted thereon, each carrier provided with a plurality of radially arranged, horizontally disposed, shafts provided with pulleys, a mold associated with each of said radially arranged shafts, ashaft provided with pulleys, a power transmission belt connecting each of said last: named pulleys with those of the first-named pulleys and moving with the carrier from a charging to a discharging position, and motor-drive means for said last-named shaft.

14. In a centrifugal casting machine, the combination with a plurality of rotatable molds, and a charging device, of means for successively charging saidmolds from saiddevice, means for rotating said molds during the charging operation and until the metal becomes set, a rotary support for said molds,

and means for imparting a step-by-step ro-' tation to said support.

In testimony whereof, I afiix my signature.

JOHN WISHART,

rotatable.