US992379A - Hydraulic molding-machine. - Google Patents

Description

G. A, OERTZEN. HYDRAULIC MOLDING MACHINE.

APBLIOATION FILED JAN. 20, 1910.

Patented Ma 16,1911.

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G. A. OE RTZEN.

HYDRAULIC MOLDING MACHINE.

APPLICATION FILED JAILZO, 1910.

992,379. Patented May 16, 1911.

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UNITE STATES ATEN OFFICE.

GUSTAV ADOLF OERTZEN, OF DUSSELDOBF-OBERCASSEL, GERMANY.

HYDRAULIC MOLDING-MACHINE.

To all whom it may concern:

Be it known that I, GUSTAV ADoLr Oman ZEN, a citizen of the German Empire, residing at Dusseldorf-Obercassel, Germany, have invented an Improved Hydraulic Molding- Machine, of which the following is a specification.

This invention relates to a hydraulic molding machine for radiators and similar articles, which is freely accessible from all sides and in which the molding box is eflectively locked against pressure during the molding operation.

In the accompanying drawing: Figure l is a side elevation partly in section of a duplex molding machine embodying my invention, Fig. 2 a cross section of part thereof showing the counter pressure plate lowered, Fig. 3 a similar section with the plate raised, and Fig. 4 a side elevation of part of the machine.

The molding press proper comprises a lower frame a supporting a cylinder at within which plays a hydraulic plunger 5. The latter is provided with an upper reduced section 6 received within a corresponding socket of a follower c that is seated on the annular shoulder 5 formed between plunger 5 and section 1). Follower 0 is guided by depending rods 0 engaging perforated lugs a of frame a. Follower 0 supports the model or mold board M (Figs. 2 and which is reciprocable in a stationary sand receiving frame (Z which is surmounted by the flask 6. Frame (Z is adapted to receive the necessary charge of sand prior to the application of flask e to said frame and to hold said charge before it is forced into the flask by the rise of plunger 5, as hereinafter de-.

scribed.

In order to-hold flask e in position during the molding operation, I provide a plate or abutment 9 adapted to be lowered upon flask c and to be raised off the same, by hydraulic means. Plate 9 is secured to a yoke s, which normally rests upon the toothed foot or rack z of a piston h. This piston is guided by rods 72,, 7L2 and plays within a cylinder 72,3 mounted on an outrigger arm of an upper frame f which arm overhangs lower frame a. For actuating plungers Z) and 7a, pumps 9 operated by handles 1 are provided, which Specification of Letters Patent.

Application filed January 20, 1910.

Patented May 16, 1911.

Serial No. 538,991.

pumps may be coupled to cylinders a, h by conduits s, 25 respectively.

Piston h is movable independently from yoke s and plate 9, and its rack i engages the inner toothed ends of a pair of two arm levers Z6, is pivoted at Z, Z to plate 9. The outer toothed ends of these levers are by wheels m, m, intergeared with the spindles n, n, of a pair of locking bars or claws 0, 0. These claws are adapted to engage a pair of projections or keepers p, p formed on frame a.

After frame (Z has been filled, and box 6 superposed, piston 72, is lowered, to lower plate 9 upon flask e. Bythe further independent descent of piston it, within the upper chambered section of plate g, rack 2' will. by levers is, 70 and wheels m, m swing bars 0, 0 downward and into engagement with keepers p, p. In this Way the upper moldsection will become securely interlocked with the lower section, so that plunger Z), may be advanced to effect the molding operation. The pressure Water is then withdrawn from the cylinder of plunger 7), and piston h is raised to first uncouple bars 0, 0- from keepers 7), p, and then raise plate 9 off flask e. The flask may now be readily removed from either side of the machine, all of which is freely accessible to the operator.

I claim:

1. In a molding machine, a lower machine frame, a sand frame and a superposed molding flask mounted thereon, and a plunger reciprocable within said frame, combined with an upper machine frame having a stationary outrigger arm that overhangs the lower frame, a piston movable in said outrigger arm, an abutment on said piston and adapted to be lowered upon the molding flask, and means actuated by the piston for locking said abutment to the lower machine frame.

2. In a molding machine, a lower machine frame, a plunger and a molding flask carried thereby, combined with an upper machine frame, a piston carried thereby, a yoke loosely supported by the piston, a pressure plate carried by the yoke, a pair of locking bars pivoted to the plate and operable by the piston, and keepers on the lower machine frame adapted to be engaged by said bars.

3. In a molding machine, a lower machine keepers on the loWer machine frame adapted frame, a plunger and a molding flask oarto be engaged by said bars.

ried thereby, combined With an upper ma- Signed by me at Barmen, Germany, this chine frame, a piston carried thereby and 3rd day of January 1910.

having a rack, a yoke loosely supported by GUSTAV ADOLF ()ERTZEN.

the piston, a presser plate carried by the lVitnesses:

yoke, toothed levers engaged by the rack, OTTO KoNIG,

looking bars intergeared With the levers, and CHAS. J. VRIGHT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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