US1409464A - Mold-forming apparatus - Google Patents

Description

J. (LPELTON.

4 MOLD FORMING APPARATUS.

APPLICATION FILED JULY 12, 1920.

Patented Mar. 14, 1922.

Icy-

INVENTOR Jbhz CPeZ-Zmz ATTORNEY UNITED stares PATENT GFFECE.

JOHN C. PELTON, or SIERRA MADRE, oALIroRNm.

MOLD-FORMING APPARATUS.

To. all whom it may concern. I

Be it known that I, JOHN C. PELTON, a citizen of the United States, residing at Sierra .Madre, in the county'of Los Angeles and State of California, have invented new and useful Improvements in Mold-Forming Apparatus, of which the following is a specification. j i

My invention relates to apparatus for formingmolds, especially adapted v for the vide means whereby the molded article may be efliciently ejected from the mold without materiallydestroying or effecting the molding material forming the same, whereby the same molding material and mold may be used over again for the casting of subsequent articles.

Other objects will appear. in the following description, will be ointed out .in the claims and will be embo ied in the accompanying drawings, in which:

Fig. l is a plan view of the apparatus embodying my invention, showing a plurality of patterns projected into a flask and the molding material packed therearound.

Fig.2 is a vertical section of the same taken on the line 2-2 of Fig. 1.

Fig. 3 is a transverse plan section of the same taken on the line 3+3 of Fig. 2. V

Fig. 4 is a section similar to Fig. 2, showing the pattern removed from the flask, and the concrete casting material poured into the molds formed thereby.

In carrying out my invention, 10 represents a tank formed of any suitable material over the top of which is mounted a plate 11,

which is provided with a lurality of circular perforations 12 of a diameter equal to the outside diameter of the pipes to be cast. A plurality of standards 18, which are centrally disposed with respect to the perforations 12, are secured to the bottom of 1920. Serial No. 395,515.

Specification of LettersPatent. Patented lua 14 1922 Application filed Z fuly 12, a

tank 10, and projectupwardly in said tank. and have mounted on their upper ends the, circular disc members 14 which are disposed on a level with the plate. 11 and are of a diameter equal tothe inside diameter ofthe pipes 'to be cast. By this construction it will be seen that ring; like apertures 15- are formedbetween the wallsofthe perforations 12and theperipheral edges'of the disc membersll.

Mounted above theplate 11 is a flask 16, which is secured to said plate andthetank 10 by means of the angle. irons '17, and mounted in the tank 10 is a hollow float member 18 adapted to slide .on the standards 13 and to be guided thereby.

Mounted on the upper surface of the float l8 and secured thereto is a plurality of cyli-ndrical patterns 19, of the size and shape of the article to be cast which are adapted to project through the ring like apertures 15.

The tank 10 is made water tight and is provided with liquid inlet and outlet pipes 20 and 21 having cut-off valves 22 and 23.

In operating the apparatus, water or other liquid is admitted into the tank 10 through the pipe 20 which causes the float 18 to rise and project the pattern members 19 through the ring likeapertures 15 up into the flask 16, as clearly shown in Fig. 2 of the drawings. The flask 16 is then filled with moist sand or other suitable molding material 24 which becomes packed around the pattern members. After the same has become sufficiently set the liquid is withdrawn from the tank 10 through the pipe 21, which allows the float 18 todescend by force of gravity and withdraw the patterns from the flask 16 as shown in Fig. 4:, thus forming molds in the sand intowhich the cement mixture 25 may be poured in the usual manner.

After the cement mixture has become sufliciently set the molding material may be pumped into an adjacent flask or otherwise removed from the flask and the finished product taken from the flask; or liquid may again be admitted into the tank, thus causing the pattern member to rise and push the products upwardly and out of the mold, thus preserving the mold for future castings.

It will be obvious that without departing from the spirit of my invention the, gnold may be formed permanently in the flask 16 of some solid material, such as wood or metal and the pattern member used merely to eject the finished article from such mold. l

What I claim is:

1. An apparatus of the class described,

comprising a flask, a tank mounted below said flask, a float mounted in said tank, a pattern secured to said float, and means for lifting and lowering said float whereby said pattern may be projected into and out of said flask.

2. An apparatus of the class described, comprising a; flask, a bottom for said flask provided with an aperture the walls of which being of a contour equivalent to the outer cross sectional shape of an article to be molded, a'plate supported independently of said bottom disposed within said aperture of a contour equivalent to the internal cross sectional shape; of said article, and a float means for'projecting' apattern of the shape of said article through the space formed between the walls of the aperture in said bot,- tom and v the edges of said plate, into and out of said: flask.

partment to cause a withdrawal of the pat tern from the molding compartment when the molding operation has been completed.

In witness that I claim the foregoing I have hereunto subscribed my name this 2nd day of July, 1920. l

J C. PE'LTON.

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