US335331A - Bung-bush-molding machine - Google Patents

Description

(Model.)

44A. G. ANDERSON. BUNG BUSH MOLDING MAGHNE.

PatentedA Feb. Z, 1886.

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UNITED STATES PATENT OFFICE.

ANTON G. ANDERSON, OF CHICAGO, ILLINOIS.

BUNG-BUSH-MOLDING MACHINE.

PECIFICATION forming part of Letters Patent No. 335,331, dated February 2, 188.

Serial No. 151,799. (Model.)

To @ZZ whom, it may concern.-

My invention relates to machines formolding bung and other bushes, and has for its objectanimproved construction of such machine,

whereby molds for bushes can be made with greater facility and accuracy.

Theinvention is embodied in a machine co1n prising, essentially, a molding-sand-rcceiving table or bed made with screw-threaded openings or provided with removable interior-ly threaded bushings, the pitch and size of the threads of which are substantially the same as those of the pattern which is to be turned through the same, the said pattern being secured on the end of a shaft suitably constructed, and operated by mechanism for turning and at the same time raising or lowering the same.

In the accompanying drawings, in which like letters refer to corresponding parts in the different figures, Figure l is a vertical longitudinal section oi' a machine embodying my inventiomwith half ofthe ask and the bushbung patterns in position to make their impression in the sand. Fig. 2 is a top plan view with a portion broken out to show the operating mechanism. Fig. 3 is a section on the line x :c of Fig. 2, and Fig. 4. is a detail section on the line g/ y of Fig. l.

The letter A designates the frame; B, a bed or table supported and preferably xed thereon. This bed is made with one or more openings, in which are removably secured screwthreaded or other bushings,a, so that their upper edges will be flush with the surface ofthe sand-receiving table. A bung-bush or other pattern, Z), fits into and is adapted to move through the removable bushing a. In this instance the pattern bis secured upon the upper screw-threaded end of a vertical shaft, G, between suitablescrew-m1ts, c and d, one above and the other below the pattern. The upper pattern.

the pattern Z in place. Upon a bar or beam, C, is mounted a screw-threaded boss, c, and a bevel-gear,f, which is centrally bored and provided with a feather or spline, g. The boss is fixed, and the bevel-gear is adapted to be rotated. As a means for securing the boss and bevel-gear in place,I have shown pins h,pass ing through the bar or beam C and the bosse, the said pins engaging a circumferential groove in the upper portion of the bevel-gear. These pi ns, while permitting the rotation of said gear, serve also to hold both the boss and the gear in position. That portion of the shaft G- which passes through the boss is screw-threaded, as seen at t', to engage the screw-thread in said boss, so that rotation of the shaft will cause it to move vertically therein. The lower end of the shaft G, where it passes through the bevelgear, is made with a groove to correspond with and receive the feather or spline g. Suitable connecting-gear, and an operating or driving Wheel, I, and a latch or brake, K, for the latter, may be provided.

The letter D designates a hal f-flask which is placed upon the bed or table B to receive the sand in which the patterns are to leave their impressions.

rlhe operation of the machine is as follows: Supposing that the bungbush pattern is below the opening in the bed or table B, and it is desired to make a mold for a bung-bush, the bevel-geauf is turned in the proper direction and the shaft G turns with it. rIlhe shaft G, together with the pattern i), will be elevated by the turning of the shaftin the screw-thread ed boss e. The feather or spline g engaging the groove in the end of the shaft, while compelling the said shaft to revolve, permits the vertical movements thereof. It is of course understood that if the pattern and the opening through which it passes are threaded the pitch of the thread at the portion fi of the shaft and that in the boss which it engages must be such that a single turn in either alone will produce an equal vertical movement of the shaft. Then the pattern has been raised suliciently above the upper surface of the bed B, the halfiiask is placed upon thebed, and the molding-sand, in proper condition for such Work, is placed and tamped or packed firmly therein around the pattern, so as to entirely fill the threads and conform to its shape and IOO conliguration. This having been done, the pattern is removed by revolving the bevelgear f in the direction the reverse of that for raising the pattern. They are made to descend with an even and regular descent/until they are even with or below the upper sur.- face of the bed, so as to leave the same with a perfect impression of the threads or other external configuration. The fiask is then carefully removed,aud is ready to be joined to its fellow flask, which contains the form for the core.

To provide for the molding of a number of bushes, as shown in the drawings, the frame is fit-ted longitudinally with a driving-shaft having a suitable spur-gear wheel at one end thereof. This gear engages similar gears upon two other shafts extending parallel with the drive-shafts. The two latter shafts are iitted with bevel-gears, which mesh with and turn bevel-gearsf, which turn screw-shafts carryiug patterns to be raised and lowered, as hereinafter particx'llarly set forth.

It is evident that the bushing a and the boss e may be formed integral with the respective parts, from which they are shown as being separate, though secured to the same.

By making the screw-threaded boss through which the pattern-shalt Gis elevated, the bushing in the sand-receiving table,and the pattern upon the shaft removable, as hereinbefore set eted to receive a securing-nut at that side and a securing-nut engaging and supporting the pat-tern at its under side, as shown.

2. In a machine for making molds for the exterior of bung or other bushes, the combination, with the shaft supporting the bush pattern,having its lower portion threaded and made with a feather or spline, of the boss threaded to correspond with the threaded por tion of the shaft, and a gear centrally bored and provided with a longitudinal groove to engage the feather or spline on the shaft, the said boss and gear being removably secured in the frame of the machine by means of removable pins, which engage the boss and gear, to hold fixed the boss and permit the gear to turn, as set forth.

ANTON G. ANDERSON.

Vitnesses:

EPHRAIM BANNING, E. F. HUBBARD.

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