US1521245A - Molding apparatus - Google Patents

Description

Dec. 3U. 19241.

J. B. LADD MOLDING APPARATUS 2 Sheets-Sheet l Filed Nov. 5, 1921 5 Eg H E D .J; B. LADD MOLDING APPARATUS Filed Nov. 5, 1921 ec, 3Q. 19241.

I 2 Sheets-Sheet '2 Z mam/Er Patented Dec. 30, 1924.,

"ITED STATES 0F W JERSEY.

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i man a mommy comm, or summon, nnw can, a coomom' Application filed November 5, 1921. Serial no. more.

To all whomit may concern:

Be it known thatI J AMES zen of the United states of America, and resident of Ardmore, in the county of Montgomery, in the State of Pennsylvania, have invented certain new and useful Improvements in Molding Apparatus, of which the following is a true and exact description, reference bein had to the accompanying drawings, whic form a part thereof.

M invention-relates to molding apparatus ot t e general type described in the patent to Lemoine No. 1,299,967 of Apnl 8, 1919. The object of my invention being particularly" to adapt mechanism of the general character of that described by Lemome to the manufacture of molds having one plain and one bell end and in which the flasks are supported during the moldformmg operation with the bel end uppermost. My object is further to adapt and improve the mechanism so that it will be adapted to simultaneousl form a multiple series of molds and to rapi ly and accurately shift the multiple series of flasks to and from the position in which the molds are formed.

The nature of my improvements will be best understood as described in connection with the drawings in which they are illustrated and in which- Figure 1 is a vertical elevation taken on the section line 1-1 of Fig. 2. a

Figure 2 is a vertical e evation taken on the section line 2-2 of Fig. 1 and the head F.

Figures 3, 4, 5 and 6 are respectively horizontal sections taken on the section lines 3-3, 4-4, 5-5 and 6-6 respectively.

A, A, are vertical columns firmly secured to the ground at their base and suitablBy braced at their upper ends as by means B, and C, C. The columns A are slotted at their u per ends as by turningi in flan es AA? see Fi .-3) so as to alter guides or war down the slots formed by the inwardly turned flangesjA. form guides for the ram. head I and still lower the columns are most conveniently made solid as indicated in Figures 5 and 6. D, D, are short beams extending between B. Lane, a citi-.

the beams C, G and acting in connection with the adjacent beams D to sup ort the rods E, E, to the lower ends of w 'ch are secured pistons indicated at E. F is a head or beam having ends F F which are guided in the slots at the top of the columns A as shown in Fig. 3 and to which are secured the cylinders G, G, in which the pistons fit, G G indicating the heads of these cylinders. The cylinders G G, are continued as indicated at G in tubular form and secured at bottom to the ram head I and the tubular extensions of the cylinders are formed with guide rims as indicated at i G. H, H are piilllegs secured to the beam or head F and are similar pulleys secured to the head J to be hereafter described, H H indicating ro es or chains working over the pulleys as in 'cated. The ram head I is through its ends I I guided in the slots A of the column A and is formed. with a series of vertical perforations as indicated at I for the dpassage of the main rammin patterns an has attached to its lower si e a series of atterns P I etc. for forming the bell mout of the molds. J is a head guided on the guideways G as shown in Fig. 4 and supporting the pulleys H and descending from this head are the main rammm patterns K, K, etc., the ramming heads of w ch are indicated at K. L is a rotatable mold rack supfiort pivotally supported as indicated at U and supportm the platforms N and N on each side of w ich are formed a multiple series of racks for supporting Eipe molds, the platform N having its mol supporting device N N formed so as to enga e and support the bell and of the flask an the platform N having guiding recesses N formed in which to properly align the lower end of the flask. 1,

M 1s a cylinder in which works the piston M having attached to it a rack M which engages a spur gear L on the rotatable support L the construction being such that as the piston is reciprocated the support and racks attached to itoscillate through an angle of 180 bringing each multiple rack in turn into alignment with the mold ram machinery and after the rammin of the drawn from the molds the ressure fluid in mold bac to a position in which t e flasks cylinders G presses these oy inders and their can be readily removed and re laced.

0 is a ram head formed as s own with a series of apertures 0' so s aced as to come into alignment with the flas s held in a mold rack when the rack isin position for ramming the molds and to this ram head and surrounding the apertures O are attached the annular rims P, P, etc. which are externally of a size to enter and fit the bottom ends of the flasks and internall of such size as to fit the ramming heads of t e main ramming patterns. The ram head 0 is secured to the top of a plunger Q, working in a cylinder Q, by means of which theramming head is elevated to engage the rims P in the flask and retracted to disengage the rims and flasks. It is desirable that the rims P should move slowly upward in the flasks when the ramming heads of the main ramming patterns begin their operation of compacting the sand in the mold and for this purpose I have shown a pipe R entering the cylinder Q and having a valve R with an operating arm R extending from it in position to be engaged by a finger R on the head J the upward movement of which head draws the ramming patterns up through the molds.

S, S, etc. are the mold flasks having as shown their bell ends S held in elevated osition and their plain ends S turned ownward.

In operation a multiple series of flasks are placed in the flask rests remote from the ramming machinery and the ramming head 0 being in retracted position and the ramming patterns in position elevated above the flasks. The flask rack is rotated by means of the c linder M and the mechanism described t rough 180 to the position shown at the left hand side of Fig. 2. With the flasks in this position the ram head 0 is elevated with rims P, which rims enter the bottoms of the flasks. The ramming patterns K, K, are lowered through the flasks to the position shown in Figures 1 and 2. The flasks are then charged with sand after which power is applied to the ropes or chains H with the efl'ect of drawing down the head F against a constant pressure maintained in the cylinders G, G, until the attached head I with its patterns I are drawn down against and into the bell mouths of the flasks, further application of power through the ropes H draws up the head J and the attached rammin patterns K, K, etc. Toward the beginmng of the upward movement of these patterns a further upward movement is imparted to the ram head 0 and the rims P by the opening of the valve R and for the purpose of insuring the compacting of the molding sand at the plain end of the flask.

After the ramming patterns are withattached. heads F and I upward so that the patterns I clear the tops of the flasks and then the ram head 0 bein moved downward to disengage the rims the rack support L is again rotated through an angle of 180 to brin the com lete molds into position for rea y remova and to bring a new set of flasks in position for ramming.

'It will be observed that in my construction the mechanismsfor acting upon the tops \and bottom of the mold are in proper and permanent alignment with each other and in fixed and permanent operative relationship'with the mechanism for transporting the molds to and from ramming position.

Having now described my invent1on,what I claim as new and desire to secure by Letters Patent, is: v

1. A pipe mold ramming machine comprising in combination mold supporting means adapted to hold a pipe mold with its of the mold, means for a vanoing and retracting said head supported independently of the mold, a socket pattern vertically movable into and out of the top of the mold, a main ramming pattern centered in its lower positionin the mold by the rim and socket pattern and means for drawing the main ramming pattern through the mold.

-2. Apipe mold ramming machine comprising in combination mold supporting means adapted to hold a pipe mold with its bell end uppermost, a vertically movable head perforated to give passage .to a pattern head and having surrounding said perforation an annular upwardly projecting rim adapted to fit in the plain bottom end of the mold,means for advancing and retracting said head supported independently of the mold, a socket attern vertically movable into and out of the top of the mold, a main ramming pattern centered in its lower position-in the mold by the rim and socket pattern, means for drawing the main ramming pattern through the mold, and means operating synchronously with the upward movement of the main ramming pattern to cause the rim supporting head to move toward the mold and the rim to move upward in the mold'for a short distance as the main ramming pattern begins its operation.

3. A pipe mold ramming machine comister in turn with the racks, a ram'head having annular rims extending up from it adapted to register with and enter the plain ends of the series of pipe molds supported 5 on a rack, a ram head vertically "movable above the rack and in fixed alignment with the lower ram, series of hell mouth patterns secured to said ram head arranged to enter the hell ends of the molds when the ram head is depressed and a series of ramming patterns adapted to be drawn upward through the molds and to fit in lower position in the annular rims supported on the lower rem head.

J ES 13. LADD.

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