US895814A - Apparatus for molding. - Google Patents

Apparatus for molding. Download PDF

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Publication number
US895814A
US895814A US36793607A US1907367936A US895814A US 895814 A US895814 A US 895814A US 36793607 A US36793607 A US 36793607A US 1907367936 A US1907367936 A US 1907367936A US 895814 A US895814 A US 895814A
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United States
Prior art keywords
pattern
flask
plate
molding
mold
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Expired - Lifetime
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US36793607A
Inventor
Thomas H Symington
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Symington Co
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Symington T H Co
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Publication date
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Priority to US36793607A priority Critical patent/US895814A/en
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Publication of US895814A publication Critical patent/US895814A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes

Definitions

  • the present invention relates to a molding machine and more particularly to that type of molding machine in which'the pattern is stripped as it is withdrawn from the sand.
  • Stripping plates broadly are not new.
  • a molding machine provided with a stationary stripping plate through which the pattern is lowered from the flask, after the sand has been rammed in, is in use in the art.
  • the disadvantage of this machine is, that as the pattern is lowered from the flask, the sand which forms the interior of the mold is un supported and frequently parts of it are displaced, injuring or destroying the work.
  • the turnover machine has not previously been provided with a stripping plate. It is common practice to provide a pattern plate which is pivotally mounted and to which the pattern is secured.
  • the pattern plate In the operation of this machine the pattern plate is first rotated until the pattern is in an upright position above the plate; it is then inclosed by the flask, which is clamped in position; the sand is rammed home, a bottom plate placed over it and clamped to the flask. The pattern plate is then rotated in its bearings, carrying with it the pattern, flask and mold'until the flask hangs above a table, which is raised by any convenient means, as hydraulic or air pistons, to receive it. The clamps which hold the flask to the pattern plate are then removed, and the flask containing the mold is lowered. The pattern is thus removed from the mold, and remains in position for the operation to be repeated.
  • the subject matter of this invention consists in the provision in a turnover molding machine of a stripping plate, and various details and combinations of parts relating there- 'to, and the method of molding by which the attern is strip ed as it is removed from the flask, the flask eing maintained during the operation in such a position that the sand does not tend to be displaced by force of gravity.
  • the pattern is removed from the mold and stripped while the mold is in such a position that the sand is not easily dis placed, and also in a position which is convenient for pouring or removal to a distant place of pouring.
  • Figure 1 is a front elevation of a molding machine in connection with my invention as shown and described. The mold and flask are partly removed from engagement with the pattern.
  • Fig. 2 is an end elevation of the machine in the same position.
  • Fig. 3 is a front elevation of the machine in position to receive the molding material.
  • the illustration comprises a pattern plate (1) provided with journals (2) supported in bearings (3) mounted in the uprights (4) of a suitable frame.
  • a means, not shown, is provided whereby the pattern plate may be rotated in its bearings.
  • a pattern (8) is temporarily secured to the pattern plate by any convenient means as to bolts (9).
  • a stripping plate (10) the opening in which conforms to the largest horizontal cross section of the pattern is shown in Figs. 1 and 2 resting on the mouth of the flask.
  • the method of molding contemplated by the invention is as follows: The pattern plate to which the pattern is attached is first rotated until the latter is in position above the pattern plate; the pattern is then encompassed by the stripping plate, which rests on the pattern plate, and the flask is then positioned in relation to the stripping plate by means of lugs (11) thereon, which are bored to receive the pins (12) of the stripping plate and clamped to the pattern plate by means of the usual clamps, not shown.
  • the flask incloses the pattern laterally.
  • the sand is next rammed into place about the pattern, and a bottom board (13) is placed thereon and clamped to the flask.
  • the pattern plate carrying stripping plate, flask, pattern, and mold is then rotated through an arc of approximately 180 degrees until the flask is suspended over the table (5), which is then raised until its surface is in engagement with the bottom board.
  • the clamps which hold the flask to the pattern plate are then removed, and the mold contained in the flask, on top of which rests the stripping plate, is lowered, the pattern being withdrawn through the stripping plate and thereby stripped.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Description

PATENTED AUG. 11, 1908.
T. H. SYMINGTON. APPARATUS FOR MOLDING.
APPLICATION FILED APB. 13,1907.
2 SHEETS-SHBET 2.
wnw a Z 1? Syn 267:0 072,
wane/aces y QM UNITED STATES PATENT OFFICE.
THOMAS H. SYMINGTON, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE T. H. SYMINGTON COMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF MAINE.
APPARATUS FOR MOLDING.
Specification of Letters Patent.
Patented Aug. 11, 1908.
To all whom it may concern:
Be it. known that I, THoMAs H. SYMING- TON, citizen of the United States of America, and resident of the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Apparatus for Molding, of which the following is a specification.
The present invention relates to a molding machine and more particularly to that type of molding machine in which'the pattern is stripped as it is withdrawn from the sand.
Stripping plates broadly are not new. A molding machine provided with a stationary stripping plate through which the pattern is lowered from the flask, after the sand has been rammed in, is in use in the art. The disadvantage of this machine is, that as the pattern is lowered from the flask, the sand which forms the interior of the mold is un supported and frequently parts of it are displaced, injuring or destroying the work. The turnover machine has not previously been provided with a stripping plate. It is common practice to provide a pattern plate which is pivotally mounted and to which the pattern is secured.
In the operation of this machine the pattern plate is first rotated until the pattern is in an upright position above the plate; it is then inclosed by the flask, which is clamped in position; the sand is rammed home, a bottom plate placed over it and clamped to the flask. The pattern plate is then rotated in its bearings, carrying with it the pattern, flask and mold'until the flask hangs above a table, which is raised by any convenient means, as hydraulic or air pistons, to receive it. The clamps which hold the flask to the pattern plate are then removed, and the flask containing the mold is lowered. The pattern is thus removed from the mold, and remains in position for the operation to be repeated.
The subject matter of this invention consists in the provision in a turnover molding machine of a stripping plate, and various details and combinations of parts relating there- 'to, and the method of molding by which the attern is strip ed as it is removed from the flask, the flask eing maintained during the operation in such a position that the sand does not tend to be displaced by force of gravity.
It is also within the scope of my invention to raise the pattern through the stripping plate as it is removed from the mold. The
desired end to be attained by my improvement is, that the pattern is removed from the mold and stripped while the mold is in such a position that the sand is not easily dis placed, and also in a position which is convenient for pouring or removal to a distant place of pouring.
In the accompanying drawings,Figure 1 is a front elevation of a molding machine in connection with my invention as shown and described. The mold and flask are partly removed from engagement with the pattern. Fig. 2 is an end elevation of the machine in the same position. Fig. 3 is a front elevation of the machine in position to receive the molding material.
I have described and shown a machine in connection with which my invention has been used, but which is not necessary to its operation. The stripping plate and method of molding herein set forth may be employed in connection with various turnover molding machines.
The illustration comprises a pattern plate (1) provided with journals (2) supported in bearings (3) mounted in the uprights (4) of a suitable frame. A means, not shown, is provided whereby the pattern plate may be rotated in its bearings. A table (5) adapted to be raised and lowered by means of pistons (6) actuated by hydraulic or air pressure, supports at certain periods of the operation the flask (7). A pattern (8) is temporarily secured to the pattern plate by any convenient means as to bolts (9). A stripping plate (10), the opening in which conforms to the largest horizontal cross section of the pattern is shown in Figs. 1 and 2 resting on the mouth of the flask.
The method of molding contemplated by the invention is as follows: The pattern plate to which the pattern is attached is first rotated until the latter is in position above the pattern plate; the pattern is then encompassed by the stripping plate, which rests on the pattern plate, and the flask is then positioned in relation to the stripping plate by means of lugs (11) thereon, which are bored to receive the pins (12) of the stripping plate and clamped to the pattern plate by means of the usual clamps, not shown. The flask incloses the pattern laterally. The sand is next rammed into place about the pattern, and a bottom board (13) is placed thereon and clamped to the flask. The pattern plate carrying stripping plate, flask, pattern, and mold, is then rotated through an arc of approximately 180 degrees until the flask is suspended over the table (5), which is then raised until its surface is in engagement with the bottom board. The clamps which hold the flask to the pattern plate are then removed, and the mold contained in the flask, on top of which rests the stripping plate, is lowered, the pattern being withdrawn through the stripping plate and thereby stripped.
The method and means of molding contemplated by the invention have been herein described specifically, and in detail, but the invention is not limited to the details described but oonsists broadly in the method and means for molding by which the pattern is stripped as it is removed from the flask, the flask being maintained during this operation in such a position that the sand does not upward through the stripping plate, causing the stripping mechanism to operate while the mold is in upright position.
Signed by me at Baltimore, this of March, 1907.
THOMAS H. SYMINGTON. Witnesses:
J. MERGER GARNETT, Jr., E. JOHN NICHOLS.
28th day
US36793607A 1907-04-13 1907-04-13 Apparatus for molding. Expired - Lifetime US895814A (en)

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US36793607A US895814A (en) 1907-04-13 1907-04-13 Apparatus for molding.

Publications (1)

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US895814A true US895814A (en) 1908-08-11

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