US645498A - Pipe-molding machine. - Google Patents

Description

Patented Mar. 13, i900. H; J. TAYLOR.

HPE MOLDING MACHINE.

(Application filed Apr. 15. 1899.

(No Modai.) 3 Sheets-Sheet I Q 20 o Z0 Z0 0 Z /7 24 /7 2a 26 2 F i 8 I /8 6' m 8 /8 7' E .39 H

l a v I .3 3

WfT ESSES INVENTOR Patented Mar. I3, l900. H. J. TAYLOR.

PIPE MOLDING MACHINE (Application flied Apr. 15, 1899,)

(No Model.)

3 Sheets-Sheet 2v WITNESSES [NVE TOR W Attorney m: mama PETERS no, Pncvc;

No. 645,498. Patented Mar. I3, I900.

H. J. TAYLOR.

PIPE MOLDING MACHINE.

(Application filed A r, 15, 1399.)

(No Model.) 3 SheetsSheet 3,

II W 2 IHIIIIlllIIIIIIIIIIIIIIIIIIIIII IllIlIlIlllllllll IV/TNESSES INVENTOR NITED STATES PATENT Frrcn.

PlPE-MQLDING MACHINE.

SIEGIFIGATION forming part of Letters Patent No. 645,498, dated March 13, 1900. Application filed April 15, 1899. Serial No. 718,189. (No model.)

To all whom it may concern.-

Be it known that I, HARRY J. TAYLOR, a citizen of the United States, residing at Burlington, in the county of Burlington and State of New Jersey, have invented certain new and useful Improvements in Pipe-Molding Machines; and I do hereby declare the following to be a full, clear, and exact description of the firmly and evenly at all points, so that the mold will be built rapidly and properly rigid when the pattern isvwithdrawn.

The invention embodies novel means for distributing and'fee'ding the sand, whereby choking or clogging is prevented and improved automatic packing or ramming devices and operating mechanisms, as well as other improved features, all of which are set forth in detail hereinafter, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a front elevation of the machine; Fig. 2, a side elevation; Fig. 3, a cross-section of the slide and casing; Fig. 4, a vertical section of the same; Fig. 5, a vertical section of the flask, pattern, and sand-box; Fig. 6, a detail plan of the lifting-box and adjacent devices, and Fig. 7 a detail side elevation of the same.

The frame 1, which carries the difierent mechanisms, is provided with pivots 1, journaled in fixed beams 1, at its top and bottom, so that it can be swung on a vertical axis. There are two horizontal rotary tables 2, having gear-teeth on their peripheries, which mesh with the teeth of a pinion 3, which drives them. This pinion is turned by a vertical shaft 4:, sditably geared to a horizontal shaft 5, which is operated from a power-shaft 6 by chain-and-sprocket gearing. A band-pulley 6% on shaft 6 affords means for driving the shaft. A tappet-shaft 7 is operated by the power-shaft through the intervention of a gear shaft.

ion 10. I

In the present machine two duplicate sets of mechanisms are employed, so that the molds for two pipes may be formed or rammed simultaneously, and the following description is applicable to both sets of mechanisms.

, The numeral 11 designates avertical guidecasing connected to the frame and having guides or tracks'i2, extending from top to bottom on opposite sides, and a guide-slot 13 in its front. Within thecasin g is a slide 14, havin g a rack 15 extending along its back throughout itslength. This slide is of approximately the length of the casing and adapted to travel The power-shaft also carries a pintherein from end to end. Itis provided witha bracket 16, which projects through and travels in the slot 13, thus assisting in guiding and steadying the slide during its movements. A hollow packing or ramming cylinder 17 is rigidly hung from the bracket in parallel disposition relatively of the slide and casing, and at the bottom of the cylinder are the rammer bits 18, which are hinged, as shown at 19, which insures a perfectly regular and even ramming of the end of the mold. Straight rigid bits could be substituted, if desired, when ramming the straight part of the mold. These bits are connected to the bottom of the ramming-cylinder at short distances apart, which insures a ramming of every part of the mold.

At the upper end of the casing 11 are wheels or sheaves 20, over which pass chains 21, con

8,which it carries, and a pinion 9 on the powernected at one end to the slide 14 and at the other end to counterbalancing weights 22,

which slide in the tracks or guides 12. These weights are sufficiently heavy to balance the slide, the weight of the ramming-cylinder being sufficient to pack the sand to the desired degreeof firmness.

The numeral 23 designates a Windlass, which is geared to pinion 10 in such manner that it can be thrown in and out of gear as desired. A chain 24, running over a sheave at the top of the casing, connects this Windlass with the slide, so that the latter and the ramming mechanism can be raised or lowered with case when desired. The tappet-shaft 7 carries a wheel having tappets 7 provided with antifriction-rollers at their ends to reduce the through which the sand is fed.

wear on themselves and the lifting-box 25. The lifting-box is movable vertically in suitable guides 26 and has a cam-track 27'on its lower end, against which the Wheels on the tappets strike andtravel. A pawl 28, pivoted to the lifting-box at 29, is adapted to engage the rack and lift the slide when the lifting-box is raised by the tappet, and the toe of this pawl is sustained by a stud or block 30. The heel 31 of the pawl is in position to engage a trip 32 on the frame 1 when the lifting-box has been raised sufficiently, which disengages the toe of the pawl from the rack, allowing the rammer and slide to drop by gravity. A stop 33 is provided on the liftingbox to limit the movement of the heel of the pawl When tripped by the part 32. On the lifting-box is a catch 34, and on the frame 1 is a pivotally-mounted sustaining-catch 35, adapted to be swung under the catch 34 to support the box in inoperative position when the mold has been completed on one side of the machine and the other mold is not finished.

Supported, end on, on the rotary table 2 is a flask 36, of usual construction, and within this is the pattern 37, which has a hub 38 at its lower end, of proper shape to form the I mold for the outer part of the hub of the pipe. 30.

The numeral 39 designates a sand-box, of cylindrical shape and the same diameter as the pattern, which has a bottom 40 separated from the sides of the box by a space 41, This box has legs 42, which fit in pockets 43 in the upper end of the pattern, supporting the box with its bottom sufflciently far above the pattern to give ample space for the discharge of the sand into the space 44, between the flask and pattern, where the mold is rammed. To prevent choking or clogging of the sand, 1 provide an agitator 45, which comprises-astraight bar 46 of the same length as the diameter of the bottom, having a pivot 47, which fits loosely in a pocket in said bottom, a vertical shaft 48, rising from the center of the box, and inclined bracing and agitating rods 49, rising from the bar to the shaft on opposite sides of the latter. The shaft 48 is secured to casing 11 by a bracket 50.

The flask, pattern, sand-box, and agitator having been placed in position, the pawl is released from the rack and the Windlass op-' erated to lower the ramming-cylinder into the flask and around the pattern. The pawl being rengaged with the rack and the machine set in motion, the operation will be as follows: The table turns with the flask, pattern, and sand-box,while the agitator is stationary. The sand is stirred by the agitator and issues in a continuous stream from all parts of the space at the bottom of the sand-box, enveloping the upper end of the pattern on all sides and falling into the space 44. As the tappets revolve their rollers strike the cam on the lifting-box, and while traveling over it raise the box steadily higher and higher until they pass off the cam abruptly, allowing the box to drop by gravity in position to be struck again. During the ascent of the lifting-box the pawl is engaged with the rack on the slide, so that the ramming-cylinder is lifted; but as soon as the box has ascended sufficiently far to cause the heel of the pawl to engage the trip the toe of the pawl is thrown out of engagement with the rack, whereuponthe slide and rammer fall by gravity and the rammer-bits pack the sand tightly.

When the rammer is again rising for another blow, the flask and pattern are turning so that any parts of the mold being formed which were not properly packed by the previous blow receive a direct impact, and thus the packing pressure applied to all parts of the mold is the same. After the rammer has fallen the lifting-box drops, the pawl trailing on the rack, and the next tappet presented to the cam causes a repetition of the process. The employment of hinged rammer-bits is very advantageous, because they adapt themselves to the peculiar formation of the hub of the pattern and insure a proper packing or ramming of this part of the mold, otherwise diflicult to obtain. With the present machine two molds can be rammed at the same time, as the two sets of mechanisms are duplicates. \Vhen two molds are being rammed and one is completegL before the other, the mechanism used on the completed mold is stopped by disengaging the pawl and holding the lifting-box up by engaging its catch with the pivoted catch.

If desired, only one set of ramming mechanism can be used at a time, and as soon as the mold is completedthe sand-box can be removed and the frame swung on its pivots clear of the flask and pattern on the table. These can then be removed from the table by a crane and set on end and the pattern raised out of the mold.

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

1. In a machine of the class described, the combination with a hollow cylindrical ramming device, of a plurality of hinged bits at the periphery of said device, so as to be capable of rocking or swinging laterally.

2. In a machine of the class described, the combination with aflask and a pattern therein having a hub or head, of a mold-rammer adapted to enter the flask around the pattern, and a plurality of bits hinged to the periphery of said mold-rammer and adapted to rock or swing laterally.

3. In a machine of the class described, the combination with a flask, anda pattern therein, of a sand-box having pins fitted in the end of the pattern and supported above the same.

4. Ina machine of the class described, the combination with a flask, and a pattern therein,of a sand-box having an annular dischargeopening in its bottom, and pins-on said box which are removably received in pockets in the end of the pattern, whereby the box is supported above the pattern. 7 '5. In a machine of the class described, the combination witha flask, and a pattern therein, of a sand-box of approximately the diameter of the pattern, rigidly supported above the same, having a discharge-opening for delivering the sand into the flask, and a hollow ramming -.or packing cylinder adapted to reciprocate in and out of the flask and to receive the pattern and sand-box duringits entry in the flask. 6. In a machine of the class described, the combination with a rotary flask and pattern,- of a sand-box supported on the pattern and adapted to turn therewith, and a stationary agitator in the sand-box. M 77. In a machine of the class described, the combination with a sand-box 'havinga discharge-opening in its bottom, of an agitator having a horizontal cross-bardisposcd adjacent the bottom,'and means for accomplishing relative rotation'of the sand-box and agitator.

8. In'a machine of the class described, the combination with a sand-box having a dis charge-opening in its bottom, of an agitator comprising a shaft, stepped in the bottom,

and a horizontal cross-ban and upright braces and agitating-rods connecting the bar with the shaft, and means for accomplishing relative rotation of the sand-box and agitator.

,9. In a machineof the class described, the

combination with a slide havinga rack, and

' a ramming device connected to the slide; both adapted to drop by gravity, of a movable lift ing-box, a pawl on said box adapted to engage the rack, and a tappet adapted to alternately raise the box and release it so that it may fall by gravity.

10. In a machine of the class described, the

combination with a slide having a rack, and aramming device connected to the slide, both adapted. to drop by gravity, of a lifting-box having a cam-track, a pawl pivoted to the p:

combination with two. independent sets of box and adapted to engage the rack when the box israi'sed, and a tappe't adapted to alternately strikeand travel on the cam andraise the box, and release it.

combination with a slide having a rack,r and a ramming device connected to the slide,both

adapted to drop by gravity, of'a lifting-box,

a pawl pivoted thereto adapted to engage the rack when the box is raised, a trip adapted to engage the pawl and release it from the:

rack when the box has been raised a prede termined height, and'means for intermittently raising the box.

12. In a machine of the class described, the combination with a slide having a rack, and a ramming device connected to the slide, both v pawl, a trip adapted to engage the heel of the pawl and disengage the latter from the crack when the box has reached a predetermined height, and means for intermittently raising the box.

combination with a slide having a rack, and'a adapted to drop by gravity, of a lifting-box having an inclined cam-track, a pawl for engaging the rack when the box is raised, and a tappet-wheel having tappet-arms provided with antifriction rollers adapted to strike the cam-track and travel'thereon' I 14. In a machine of the classdescribed, the combination with a slide having a rack, and a ramming device connected to the slide, both adapted to drop by gravity, of a lifting-box, means thereon for engaging the rack, means for intermittently raising the box, a catch on the box, and a movable sustaining catch adapted to support the box out of operative position when engaged with the aforesaid catch thereon,

15. In a machine of the class described, the combination with a guide-casing havinga slot .in its side, of a slide movable in and guided by the casing, a rammer hung from a bracket which is connected to the slideand meningin the slot, means for automatically rel'asing it so'that it will fall by gravity, cables connected to the slide, and weights'connected to the cables which partially counterbalance the slide and rammer. f

v 16. In a machine of theclassdescribed, the combination with a guide a casing having guides on its opposite sides and a slot in its front, of a slide movable in the casing,'a ram= mer hung from a bracket which is connected to the slideand moves in the slot, counterbalancing-weights slidable in the guides at opposite'side's of the casing, cables connecting the weights to the slide, and means for auto maticallyraising and releasing the slide. 17. In a machine of the class described, the

rammihg -mechanism consisting of a slide and the respective windlasses to the slides, and 'means for operating onewindlass at a time or both simultaneously.

combination with two independent sets of ramming mech-anisin,'whereby two molds may be formed simultaneously, each set comprising agravity-ramm'er and automatic means for alternately lifting and releasing the same, of independent stop devices for rendering either of said automatic lifting mechanisms inoperative on the completion of the mold.

In testimony whereof I aifix my signature inpresenlce of two witnesses. HARRY J.- TAYLOR.

Witnesses:

THOMAS T. TAYLOR, CHARLES A. RIGG.

' 13. In a machine of the class described, the,

rammer-connected thereto, of independent. f iiwindlasses, independent cables connecting 11. In a machine of the class described, the v 18., In a machine of the class described, the 4 ramming device connected to the slide, both 7

Images