US491273A

US491273A - Molding-machine

Info

Publication number: US491273A
Authority: US
Publication date: 1893-02-07
Anticipated expiration: 1910-02-07

Description

No maal.) Y 2 sh@eww-sheenY 1. WLB. STERRIT.

M'OLDING:k MACHINE.

No. 49"'L273, Patented Feb. 7, 1893.

(No Mode.) 2 Sheets-Sheet 2.

W. B. STERRIT.

MOLDING MACHINE.

No. 491,273. Patented Feb. 7, 1893.

WKITNESSES INVENTQR mi Hormis umm c.. No1-aufm.. wnsumpfou. o. c.

the counter-weight raises the cylinder and rammer, when the brake is again set and the operation continued. It is evident that the counterweight may be so arranged as to gradually raise the cylinder as the sand rises in the mold.

In Fig. 6 I show a modification of the top plate for the mold for use when the side of the mold has an outward bend to make sufficient thickness of sand for the sprue 40. In this case the flange 8 is of the same form as the top of the flask, but a slot 4l is provided so that after the wheel has run around the rim of the plate and rammed the sand between the sprue and mold, it can be run through the slot off the plate, the carriage then resting upon its three casters, the rammer being guided between the sprue and the pattern. The ball and socket joint allows the rammer to move freely to the various parts of the mold, and the wheel 1G preserves the rammer in the annular space between the flask and pattern.

It is apparent that wide variations may be made in the form and arrangement of the parts. Thus the pinion may be placed upon the cylinder and the rack be stationary. A single cord may be used to support the weight. A pawl and ratchet may be used to hold the cylinder in its various positions; and many other modifications will suggest themselves to those skilled in the art without departure from the invention claimed.

The advantages of my invention are obvious. The device is simple, positive in all its movements and not liable to get out ot order, while its operation is ellicient in the highest degree, all hand work being obviated.

Vhat I claim is:-

I. In a molding machine for deep molds, a verticallymovablecylinder,arammerhavinga flexible connection with the piston rod of said cylinder, and guides on which the cylinder is arranged to rise automaticallyasthe sand rises in the mold; substantially as and for the purposes described.

2. In a molding-machine, the combination of a vertically movable motive-cylinder having suitable guides, acounterweight connected to the cylinder, and a rammer having a flexible connection with the piston-rod of said cylinder; substantially as described.

3. In a molding-machine, the combination of a vertically movable motive-cylinder having a rack and pinion connection, a brakearranged to check the vertical movement of the cylinder, and a rammer connected to the piston-rod of said cylinder; substantially as described.

4. In a molding-machine, the combination of a vertically movable motive-cylinder, means for allowing the same to rise asthe sand rises in the mold an apertured guide fixed to and carried beneath the cylinder, and a rammer havin g a flexible connection with the pistonrod of the cylinder, which rod passes through the guide; substantially as described.

5. In a molding-machine, the combination of a motive-cylinder, means for moving the same vertically, a rack fixed to the side of the cylinder and engaging a pinion, a brake upon the pinion-shaft, and a rammer connected to the piston-rod of the motive-cylinder; substantially as described.

G. In a molding-machine, the combination of a motive-eylinder, means for moving the same vertically, a rammer connected to the piston-rod of said cylinder by a ball and socket joint, and a guide for the rammer above the top of the mold; substantially as described.

'7. In a molding-machine, the combination of a rammer, means for vertically reciprocating the same, and an independently supported guide through which the rammer passes, said guide arranged to be moved over the various parts ot' the mold; substantially as described.

8. In a molding-machine, the combination with the mold, of a rotary carriage mounted thereover, a rammer flexibly connected to an actuating part, a guiding aperture in the carriage through which the rammer passes, and means for reciprocating said rammer; substantially as described.

9. In a molding-machine, the combination with the mold, of a rotary carriage mounted thereover, a pattern having a stem passing through a slot in the carriage, a guiding aperture in the carriage through which the rammer passes, and means for reciprocating the rammer; substantially as described.

I0. In a molding machine, the combination with the mold, of a plate having an aperture and an encircling flange of substantially the same shape as the mold, and a carriage having a wheel arranged to ride upon the ange, and having a guiding aperture for the rammer; substantially as described.

In testimony whereof I have hereunto set my hand this Ilth day of March, A. D. 1802.

TILLIAM B. STERRIT.

Vitnesses:

IV. I3. CoRwIN, ll. M. CoRwIN.

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