US1514909A

US1514909A - Suction mold

Info

Publication number: US1514909A
Application number: US547009A
Authority: US
Inventors: Kadow August
Original assignee: LIBBEY GLASS Manufacturing CO
Current assignee: LIBBEY GLASS Manufacturing CO
Priority date: 1922-03-27
Filing date: 1922-03-27
Publication date: 1924-11-11
Anticipated expiration: 1941-11-11

Description

Nov. 11 192%, I 1,514,909

A. KADOW SUCTION MOLD Filed March 27, 1922 ill 1 IILNNH Patented Nov. 11, 1924.

UNITED STATES- PATENT OFFICE.

AUGUST KADOW, F TOLEDO, OHIO, ASSIGN'OR TO THE LIIBBEY GLASSMANUFAC'IUR- ING COMPANY, OF TOLEDO, OHIO, A OORPORATION OF OHIO.

su'o'rIoN MOLD.

Application filed March 27, 1922. Serial No. 547,009.

will enable others skilled in the art to which 1t appertains to make and use the same, reference being bad to the accompanying drawings, and to the characters of reference marked thereon, which forma part of this specification.

This invention relates to the molding of articles from molten metal by suction.

action, and particularly to a mold for such purpose.

. An object of the invention is the provision of a simple and eflicient mold for producing sections of bearing bushings and similar articles in a rapid and eflicient manner by the suction method whereby the suction force is so distributed with respect to the mold- I5 ing cavity as to cause a perfect and eflicient drawing of of the cavity. Further objects and advantages of the invention will be apparent from 1 the following detailed description of the invention.

While the invention in its broader aspect is capable of embodiment in numerous forms, a. preferred embodiment thereof is illustrated in the accompanying drawings,

as in which,

. Fig. 1 is a vertical longitudinal section of a mold embodying the invention taken on the line 11 in Fig. 3. Fig. 2 is a cross- .section of the mold taken on the line 2-2 in 4 Fig. 1. Fig. 3 is a reduced top plan view of the mold. Fig. 4 is an inner elevation of a sideplate of the mold. Fig. 5 is a reduced pers ective view of the body member of the mol ,and Fig. 6 is a reduced perspective view of the mold.

Referring to the drawings, 1 design-ates the body member-of the mold having, in the present instance, a semi-circular recess or depression 2 in its top which extends throughout its width and is open both at the top and sides of the member. A side-plate 3 is secured to the body 1 at each side thereof in closed relation to the respective side of the recess 2, being secured thereto, in the i present instance, by screws 4.

the molten metal to all parts- A top plate or member 5 is mounted on the top of the body member 1 inclose lapping relation at its side edges to the top edges of the plates 3 and is secured to the body member by screws 6 at each end. i The top plate 5 carries at its under side a core member 7 fixedly attached thereto, in the present instance, by screws 8 andprojecting down into the recess 2 of the body member 1 with its ends in close abutting relation to the respective side-plates 3. This core member cooperates with the wall of the recess 2 and the side plates to form a molding cavity 9 of semi-circular form adapted to mold onehalf of a ring, bushing bearing, or similar member, the upper ends of the cavity bein closed by the top plate 5. If the mold article is to have edge flanges, as is usually the case with bearing bushings, the body member 1 may be marginally recessed at the ends of the depression 2, as shown at 10. An opening for the admission of molten metal to the core 9 is provided through a hole 11, which extends from the central bottom portion of thecavity 9 down through the bottom of the body member 1 and has its outer end enlarged and terminating in the present instance in a bottom extension 12 on the body member.

The top plate 5 is provided in its to with a suction chamber or cavity 13, whic has its top closed by a cover plate 14 that is secured closely to the top of the plate 5 by screws 15 and also by the screws 6. The chamber 13 has communication with a suction creating source through a-pipe 16 that is tapped into the plate 14.

The to of the bottom member 1 and bottom of 't e top plate 5 cooperate to form suction passages 17 at the outer sides of the upper ends of the molding cavity 9, and the top of the core 7 and bottom of the plate 5 cooperate to form suction passages 18 at the inner sides of the upper ends of the cavity 9. These passages extend throughout the width of the body member 1 and core 7, in the present instance, by receming the tops of said members, and each is in communication with the upper end of the cavity 9 through thin relief passages 19 formed between the plate 5 and the'respective members 1 and 7 as shown in Fig. 1. The size of each outer relief pamage 19 is enlarged by providing a plurality of narrow slits 20 (Fig. 5) in the upper outer end walls of the nner portion, in order to avoid chamber 13 through respective openings 21' and 22' in the top plate 5.

In order to efi'ect a suction within the outer edges of the flange forming recesses.

10 of the moldin cavity throughout the length thereof, eac side plate 3 is provided in outwardly spaced relation to its recess with a recess 23, which parallels the recess 10 and cooperates with the respective side of the body member 1 to form a suction passage in communication at its ends with the passages 17 andhaving a thin relief space 24 extending therefrom to the outer edge of the recess 10 throughout its length. A plunger 25 extends down through the

top plates

14 and 5 and core 7 in registering openings provided therethrough, with its inner end extending into the molding cavity 9 in register with and adapted to be projected outward through the inlet opening 11 of the cavity, the inner end of the plunger being of suitable size to fit such opening. Durin the drawing of the molten metal into the cavity 9 the inner end of the plunger 25 preferably projects a short distance into the cavit and when a suflicient quantity of meta has been drawn into the molding cavity to fill the same and while such metal is form an opening through the center of the molded article and to force from the inlet opening-11 the metal disposed therein. If it is not desired to the molded articles the plunger may be rawn out-ward to inoperative position .or'

entirely eliminated. Where the plunger is not to be used, it is preferable to have the outer end of opening 11 no larger than its difliculty in removing the casting.

In the use of my mold it is lowered into molten metal a suflicient'distance to submerge the inlet end of the opening 11 therein, and a vacuum being present in the chamber 13 will cause the metal to enter and completely fill the cavity 9 and associated flange forming recesses 10, if-such recesses are provided, due to the uniform distribution ends of the cavity and around the side edges thereof through the relief passages 19 and 24, in communication with the

passages

17, 18 and 23 which in turn are in communication with the vacuum chamber 13 through the

openings

21 and 22. When asufiicient quantity of metal has been drawn into the tendency-to run back provide openings through of 'the suction action across the upper molded article and to eject the metal from the inlet opening 11. If the metal is of such a consistency that it might have a out of the molding cavity through the inlet opening 11 after the mold has been raised from the bath and before the metal has been sufficiently cooled or congealed to retain its shape, then the plunger 25 may be employed as a valve or closure member for the opening 11 to prevent such outward flowing action of the metal from the cavity. The provision of such a valve is particularly useful when molding lead, Babbitt metals and other metals or alloys adapted to melt at relatively low temperatures, as in such cases it is more difficult to cool the metal quickly enough after removal of the mold from the bath to prevent the metal or a portion of the same from flowing back out of the cavity, thereby forming imperfect castings. When an article has been formed in the mold the

top plates

5 and 14 and core 7 are removed from the body of the mol'd'by a removal of the screws 6, after which the molded article may bewithdrawn from the body recess 2. If the side plates 3 have a tendency to hold the molded article in the recess 2 these plates may be removed from the body member -1 to permit an easy removal of the article.

I wish it understood that my invention is not limited to any specific construction, ar-.

rangement or form of the parts as it is capable of embodiment in numerous forms without departing from the spirit of the claims.

Having thus described my invention, what I claim as'new, and desire to secure by Letters Patent, is,-

1. A mold of the class described, having a semi-annular molding cavity'angular in cross section and as'sages in communica tion with the cavity entire] around the same at the external angles t ereof and .in communication with a suction creating source.

2. A mold of the class described, having a molding cavity of. substantially semi-circular form with an inlet opening at its central portion, suction passages at the inner and outer sides of the end portions of the cavity and around the side edges of the cavity with said passages in communication with a suction creating source.

3. A mold of the class described, having a molding cavity of arcuate form with an inletopening, a vacuum chamber in communicationwith a suction creating source, suction passages in communication with the vacuum chamber and with the molding cavity at its ends and around its sides.

'4. A mold of the class described; having a body portion forming a cavity with an inlet opening thereto, means removabl secured to the body and cooperating wi its aof misses communication with 'asuction creating source, the body and means forming suction passages with the ends and sides of the molding cavity and with the vacuum chamber. I

5. A mold of the class described, comrisin a bod member havin a recess in its top and an inlet opening to the bottom of said recess, side members secured to the body member and closing the opposite sides of the recess, a top means removably mounted on the body member and having a core part extending down 'into the recess and cooperating therewith to form an arcuate molding cavity, said means, body and side members forming relief passages which communicate with the ends and sides of the molding cavity and with a suction creating source whereby molten metal is drawn intoand caused to fill all parts of the molding cavity by a suction action in the relief passages.

6. mold of the class described, forming a molding cavity of thin elongated form, an inlet opening into'the cavity midway of its length and suction passages in communication with the ends and sides of the cavity and adapted to have communication with a suction creating source, and a member movably carried by the mold and adapted to be projected through a portion of the molding cavity and into the inlet opening in closing communication therewith.

7. A mold of the class described, having a moldin cavity of arcuateform with the .middle 0 the arc downward, an inlet opening into the lowest portion of thecavity,

suction passages connecting the ends of the arcuate cavity with a vacuum chamber, and a plunger movable vertically through the mold cavity and into position to close the inlet opening.

8. A mold of the class described, having an inlet opening in its bottom, a molding cavity flaring upward and outward from the opening, and suction passages connectinga vacuum chamber with the portion of the cavity most distant from the inlet, and a plunger movable through the cavity into closing relation with the inlet.

In testimony whereof I have hereunto signed my name to this specification.

AUGUST wow,