Improvements in or relating to Moulding Presses.
Year: 1897

page_text: Date of Application, 21st Oct., 1897-Accepted, 8th Jan., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Moulding Presses.
I, HARRY FRIEDERICHS, Chief Engineer of Messrs. Oppenheim & Company, of
Hanover-Hainholz, in the Empire of Germany, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention has for its object a mould-press, the chief advantage of which
is that it can be used in three different ways.
1. As a complete hand-moulding machine, the stamping or pressure of the
sand as well as the raising of the core-box from the pattern-plate being effected by
hand
2. As a moulding machine in which the sand is pressed mechanically, the core-
box being raised by hand.
3. As a machine in which both the compressions of the sand and the separation
of the pattern from the compressed mould is effected mechanically.
This is attained by the construction shown in the accompanying drawing in plan
and elevation.
In a standard g there is arranged a press-cylinder c the piston of which carries
on the press-table d a pattern plate m on which the pattern is pressed. The other
press-plate p pivoted about two studs z and can be folded down in a horizontal
direction.
In the standard 9 there is arranged a guide-rail f to which is secured a
Hshaped plate a. The latter is provided with four vertical rods s. The movement
of the guide-rail f is effected by means of a crank and connecting rod by depressing
the lever h.
.
The raising and lowering of the piston of the cylinder is effected by means of
the valve v.
A mould is prepared as follows.
1. The core box placed on the pattern-plate m is filled with sand which is
compressed by hand in the well-known manner. Then the lever h is pressed down
whereby the guide-rail f with the rods s is raised. The upper ends of the latter
engage with the corresponding projections on the core-box k or with a ring or frame
screwed or otherwise secured to said box, and lift said box from the pattern plate m,
2. The core-box k is filled with sand and the sand is compressed in it by means
of the piston t and the press-plate p. Then the pressure is stopped. After the
piston has descended to the bottom of the cylinder, the core-box is taken off in the
manner described under 1.
3. The rods s are raised and the piston t caused to rise until the plate m is at
the same height as the rods s. Then a core-box is put on, filled with sand which is
compressed by causing the piston to rise higher.
If the piston is then allowed to drop the core-box cannot follow as it rests with.
its projections on the rods s, so that in this way the compressed sand is separated
from the pattern.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is;
-
1. A moulding press characterised by the arrangement of a plate a provided
with raising rods s and secured to a guide-rail f actuated by depressing a lever h,
for the purpose of enabling the core-box to be lifted either by hand or by means
of a mechanically propelled piston substantially as described.
2. The combination and arrangement of parts constituting the complete mould-
ing press substantially as described and illustrated in the accompanying drawings.
Dated this 21st day of October 1897
BOULT & WADE,
Agents for the Applicant.