US1477872A

US1477872A - Centrifugal pipe mold

Info

Publication number: US1477872A
Application number: US542361A
Authority: US
Inventors: William L Haynes
Original assignee: Us Cast Iron Pipe & Foundry Co
Current assignee: United States Cast Iron Pipe & Foundry Co; Us Cast Iron Pipe & Foundry Co
Priority date: 1922-03-09
Filing date: 1922-03-09
Publication date: 1923-12-18
Anticipated expiration: 1940-12-18

Description

' Dec. 118 11923.

W. L. HAYNES CENTRIFUGAL PIPE MOLD Filed March 9. 1922 Patented Dec. 1%, 1 923 stares WIL LEQM 1L. EAYR'EE, 013 BURLEI IG-TGN, NEW dEESLh, NSIGNOR E0 UNITED STATES GAST 130B? PIEE do EGUHDRY COMPANY, OF BURLIEIGTQN, NEW JERSEY, A GGR- emrrar'roean Irma more.

Application filled march a, 19253. Serial Ho.

To all whom it concern:

Be it known a t i, WILLIAM L. Harr es, a'citizen of the United States of America, and resident of Burlin 11, county of Bure' lington, State of New erse have invented certain new and useful Improvements in Centrifugal ilPipe' Molds, of which the @01- lowing is a true and exact descript on, retorence being had to the accompanying drawre ing, which form a part thereof.

My invention relates to the construction of centrifugal pipe molds in which the metal comes into direct contact with the metal of the mold and which molds are so formed to. as to cast a bell flange or; enlargement on the end of the pi As heretofore constructed, such mol s have been made of an inte g of the be portion of such molds has added largely to the expense of manufacture. Centrifugal pipe molds are subject to deterioration from two causes, first, by erosion or attrition of the barrel m the cylindrical ortion of the mold WhlCh re 5 sults from. t e mechanical abrasion of dragging the newly cast pipe lengthwise of the mold to et it out of the mold, and to provide in t e best way for such attrition the barrel or cylindrical portion of the mold should be made of steel of such com osition and so heattreated as to be very ard and resistant to abrasive action. With regard to the bell portion of the mold, however, this portion of the mold Wlll have sufficient draft toabe" substantiall free from contact with the pipe as it is eing drawn out of the mold, but the interior surfaces of the bell portion of the mold are subjected to strains causedby stresses due to ex ansion and contraction and these stresses ave a tendenc to ultimately cause heat cracks in the bell, such cracks having a tendency to form both parallel to the cast of the mold and also in run s concentric with the mold. The object o? my invention is to provide a centrifugal mold in which the cost of manufacture will or ma be less and in which the barrel and bel portions of the mold will be made of materials best ada ted to resist the deteriorating influences to w ich they are subjected and l accomplishthis by forming the barrel and bell portlons of the mold of separable parts each of'whlch can be formed and treated by such material al steel forgin and the provision and able saving in cost and in such a way as to be most resistant to the eculiar strains to which the parts are Sub ected. By preference, I. make both parts of the mold ot steel, the steel used for the barrel being of such composition and so heat treated as to be highly resistant to the abrasive action of the pipedrawn through t and the steel of which the bell section is made being of such composition and so heat treated as to be much softer and more resistant to the stresses due to expansion and contraction. ll prefer to make both sections of the mold of steel for the reason that I thus provide for substantial uniformity in contraction and expansion under varying heat conditions, which is of obvious importance as hearing on the tightness of the oint at the places where the two sections of the mold are united together but obviously metals other than steel can be used particularly in the formation of the bell section and obviously, also, this section can be cast instead of rorgedwith a considerof manufacture. Reference being now had to the drawin which illustrates my invention and whicfi is a vertical section through a mold and pertinent parts, the above construction of the mold and of the parts shown in connection with it being similar to that shown in the de Lavaud Patent Number 1,299,918, of April 8,1919.

In the drawing, A indicates the framing of the machine which is provided with tracks indicated at A on which rest the supporting wheels C of the casing indicated at B. At the right hand end of the casing is a rotatable end piece indicated at E runnin in ball bearing? F secured at the end of t e casins, and aving, as shown, packings at G, the packing at G being between the rotatable end plece E and a separate wall H secured to the casing and forming with the. rotatable end piece E a turbin'e chamber J in which runs the turbine indicated at I to which is secured the rotatable part E. H is also a rotatable end piece ing in a ball bearin F at the left hand en of the casing and having a packing as indicated at G. the two parts of my centrifu al mold, the part K malrin up the cylindrical barrel of the mold and t e part K the bell end of the mold. These parts maybe secured together K and K are in any convenient way which .will insure a tight joint on the inside of the'mold. As shown, the right hand end of the barrel is internall recessed and threaded, as indieated at and formed with'an abutting surface as indicated at K. The end of the bell end is externally threaded to thread with the portion K as indicated at-K and is formed with an end abutment K adapted to fit tightly a ainst the: abutting surface h, as shown. he bell end of the moldus, as shown, formed with a flange K, b which it can be firmly secured to the rotating end piece E and it is also formed, as shown, with erforated lugs K for a purpose to be described. The leit hand end of the barrel section K is, as indicated at K", ada ted to fit and be attachedto the and piece L indicates a core sup ortin rul g on which is formed the core in icateg at The ring L is fitted in the mouth of the bell section and secured in place by the wedges M passing through the perforated In s K. O is a ring secured to the end of t e mold most conveniently, as shown, byuscrews attaching it to the end piece H, t 's ring having a portion indicated at O which forms the end section of the mold.

While, as I have stated, the general make up of the mold and associated parts is similar to that shown in the de Lavaud Patent 1,299,918, it will be understood that it is intended for use with the spout through which molten iron is introduced into the mold the manner described in the de Lavaud Pat- Il' ent 1,329,295 of January 27, 1920.

While I have in the drawings shown the turbine H arranged for rotati the mold as described in the de Lavau atent f April 8, 1919, it will, of course, unde stood that the method by which the mold is rotated is, so far as my present invention is concerned, entirely immaterial, the invention being strictly limitedto the described construction of the mold in two parts in the manner and for the dpurpose which has been sutliciently describe Having now described my invention,what I claim as new and desire to secure by Letters Patent, is:

1. A centrifugal mold for castin bell flange or enlarged ended pipe consisti of shoulder adapted to fit against the shoulder ll of the cylindrical section when screwedto it.

WILLIAM L. HAYNES.