US1126607A - Sand-strip. - Google Patents

Description

G. 0. WOOD.

SAND STRIP.

APPLICATION FILED'DEG. 9, 1913.

Patented Jan. 26, 1915.

2 SHEETS-SHEET 1.

' 0. 0. WOOD.

$AND STRIP.

APPLICATION II-LED 1530.9.1913,

Patented Jan. 26, 1915.

2 SHEETS-SHEET 2.

Jaw anion in the art to which it appertains to make and use the same, reference being had to- CHARLES o. wooi), or oHAMBEi'esBU'RG, PENNSYLVANIA.

SAND-STRIP.

Specification of Letters Patent.

Patented Jan. 2a, was.

Application filed December 9, 1913; Serial No; 805,605.

I To all whom it may concern Be it known that I, CHARLES O. VVoon, a citizen ,of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, United States of America, have invented certain new and useful Improvements in Sand Sti'ip'syandi I do hereby declare the followingtq be a full, clear, and exactdescription of the in vention, such as will enable others skilled the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to molders flasks, in particular to the arrangement and construction of the sand strips thereof, whereby I am enabled to use sand strips Without guide slots and the customary pins fastening and guiding them, and at the same time provide suitable supports and guide means for the strips.

The difficulty experienced in practice with sand strips having guide slots through which pass the pins for limiting the movement of the strips and for guiding them has been that the sand would pack in these slots and prevent the strips from being pulled out totheir full extent, thereby preventing that portion of the sand mold retained by the strips 'from being removed from the cope. a

Sand strips hitherto in use left a groove at the joint between the two adjacent flask portions of the mold entirely around the mold, so that when the sand was supported by a jacket during the pouring of the metal into the mold, the metal often broke through the groove at the corners which were un-.

supported by the jacket. This objection I avoid by constructing the sand strips in such a manner that there is no groove at the corners.

. Referring to the drawings, in ,whichlike parts are similarly designated, I have deemed it suflicient to show only the cope of the flask, as a member of the flask to which the sand strips are secured.

Figure 1 is an inverted perspective of the cope showing my invention attached there,

to. Fig. 2 is a bottom plan view ofthe cope. Fig, 3. is a section on the line 3*?) of Fig. 1. Fig. 4 is a section on the line round flasks.

4 1, of Fig. 2. Fig. 5 is a detail showing a modification. Fig. 6 is a modification of retaining hook and strap, the sand strip being broken away to show the shape of the end of the hook, andFigs. 7 and 8 show other slight variations in structure required by the form of flask to which the strips are applied.

I have illustrated my invention in connection'with a four-sided flask, however, I wish it to be understood that the same may be applied to. any flask, no matter what number ofsides it may have, and including I have also illustrated a cope as the flask member to which the sand strips are applied although it may be equally well applied to a drag or to a check member. When the drag is provided with sand strips, the mold does not remain on a bottom board, but is set down for casting without such board. The cope C isprovided with corner plates 2 at diagonally opposite corners, which corner plates are slightly thicker than the sand strips. At the other corners, that is to say, at the corners alternating with those provided with corner plat/cs2, brackets 3 are provided over which extend the corner extensions 4 of the sand strip 5, and between these brackets is mounted .a cylindrical member 6, through which passes a bent rod 7, acting as an operating handle, and journaled in the brackets, said rod being secured in the member 6 by a set screw or other manner. Byfsupporting the cope C above its drag or other member next below it and at the'corners, the sand strips are free throughout the length of their body portions and operate more easily, and the ,construction is facilitated and cheap end. By using a corner extension 4 on the strip 5 the force required to actuate the StI'lpSiriS uniformly distributed and symmetrically applied to the strip, and the liability of one side of the strip to spring when undue friction happens to be encountered by the strip, is greatly decreased. The cylindrical member 6 carries a pin 9 that passes through a hole 10 in the sand strip, extension 4, and the said extension 4 is provided with a longitudinal, beveled slot 11 inwhich is a lug 12 thicker than the sand strip that projects above the sand strip and the extension A coil spring 13 secured to the cope by means of screws 13 and extending around the corner and engaging the pin 9, operates to maintain the sand strip urged toward its nward position.

As previously stated, the object of my invention is to eliminate the binding of the sand strip by reason of the sand filling up the guide slots therein and preventing the strip from sliding, with respect to pins passing therethrough, and to this end the body of the sand strip embodying my invention has preferably no perforations whatever, and in order to properly guide the strip, and also to hold the strip to the cope, I provide pockets or straps of iron, 14, on the upper face of the strip, into which project the ends of hooks'15 on the cope C. These pockets are sufficiently wide, that is to say, somewhat wider than the width of the hook 155, to permit the sand strip to have its normal diagonal movement, and these pockets lie in recesses 16 in the under-face of the cope, one wall 17 of which is substantially transverse to the side of the cope, and the other wall 18 of which is inclined, that is to say, is at an angle of about 45, so that when the sand strip is moved by the lever? and pin 9, the edge of the pocket nearest the sand strip extension 4: will move along the said wall 18. These pockets are preferably, but not necessarily flush with the inner wall of the cope C when the sand strips are in their normal position, that is to say, projected within the cope, the ends of the hooks 15 also project preferably through the pockets and flush with the inner wall of the v cope C so that when the sand strip'ismov'ed' relatively to the hooks and to the cope, any sand that may lodge between the hook and the walls of the pocket will be forcedout, in'

other words, the pockets will be self clearing. Where it is desirable, the ends of hooks 15 Fig. 6, may be directed in the lineof movement of the pockets 2'. e., at 45 to .the walls of a rectangular flask and the pockets or straps 14 be similarlydirected.

Another feature of my invention is to cut the sand strips away at the corners of the cope as shown at 19, so that wh'en the sand strip is in normal position, the corners will be flush with the inner wall of the cope. The object. of this is to prevent the sand strips from forming a groove in the sand mold at the corners of the mold 'so that when a molding jacket is placed over a sand mold the corners will be solid, while the grooves formed by the sand strip would be entirely covered by the sides of the jacket. Jackets of the automatically adjust able type are usually open at the corners and by forming a mold with solid corners at the jointbetween the cope and drag, there is less liability of the hot metal breaking through at the corners or at points near the corners of the mold where it is unsupported by the sides of the jacket, or breaking through the mold into the sand strip groove and following along the groove and rimning out at the unsupported or uncovered portion thereof.

In the modification shown in .Fig. 5 the lug 12 is not beveled,and in order to hold the strip in place near the corner Iprovide an additional hook 15 for engaging the sand strip near the corner. By virtue of the corner pieces 2 and lugs 12 or 12 being thicker than the strip 5, the cope is supported on the drag at these points. The

sand strips being slightly thinner than the space between the cope and drag will have the weight of the cope removed from them,

thereby, enabling them to be more easily withdrawn. Y i

In Fig. 2 the sand strip 5 is shown in normal position, and the one 5 v, in withdrawn position.

In the many types of flask I have hereto-.

vention be provided with a perforation 21 as shown in Figs. 7 and 8, but such perforations are not used for, nor do they perform the functions of guide slots for the sand strlp. Their function is to permitthe movement of the sand strip relatively to the customary pins 01 that hold the cope'to the flask member next below, whether it be check or drag.

Where the patterns are of cast iron and form a part of a pattern plate that is clamped or held between the cope and drag in'some of the forms of flasks, the guide pins for the cope and drag must pass through such plate. WVhere the pattern plate is of sufli-- cient size, a cope as illustrated in Fig. 1 can be used, but where the plate is not large enough to extend over the pins,fthese pins must be positioned .closer to the sides 0 of the flask and in some cases must pass through the widened portion 20 of the'sand strips 5 or through the body portion of the strip itself. In the latter case the pins d are not on brackets attached to the sides of the flask as in Figs. 1 and 7, but are secured directly in the sides 0 of the cope and-drag as shown in Fig. 8. These perforations 21 are wider than the pins (Z so ,that any sand that may accidentally get into the perforations will be forced past, the pins when the sand strips are withdrawn, thereby being prevented from packing between a pin dand the end of the perforation.

. The perforation shown at out through 'to the inner edge ofone of the sand strips in this figure,'thus effectually preventing any clogging by 'sandbeing 21%, Fig. 8, is j crowded between the pin and end of the slot. Such a structure is always self-cleang 'I elaim stantially parallel to the guiding edges of said corner pieces.

3. The combination with a cope, of corner plates, sand strips and sand. strip guide lugs, the corner plates and guide lugs being thicker than the sand strips, and hooks for guiding the sand strips.

4. A sand strip free from guide slots in its body, pockets on the strip, and means engaging the pockets.

5. A sand strip free from guide slots in its body, and having cut away portions at the corners of the cope to lie flush with the inner walls of the cope when in normal position, and means for connecting a sand strip to the cope.

6. The combination with a cope, ofa sand strip having a slotted extension at the corner of the cope, a lug passing through the extension, straps on the sand strip near its ends and said extension, and hooks on the cope entering said straps.-

7. The combination with a cope, of a sand strip having straps thereon, hooks secured to the cope whose hook-ends enter the straps, the sides ofthe cope provided with recesses for receiving the straps, one end wall of which is substantially transverse of the cope side and the other end wall of which is sub stantially parallel to the line of movement of the strip, said straps and the ends of the hooks therein being substantially flush with the inner walls of the cope.

8. The combination with a flask member, of a sand strip having a strap thereon forming a pocket substantially in the line of the movement of the strip, and a hook on said member whose end projects into said pocket and is directed also substantially in'the line of movement of the strip.

9. The combination with a flask member, of asand strip having straps thereon forming pockets substantially in the line of movement of the strip and hooks'on said member, whose ends project into said pockets and are directed also substantially in the line of movement of the strip, said straps and the hookends therein being flush with the wallsof the cope when the strip is in normal position.

10. The combination with a cope member and a drag; of means secured to the alternate corners of one of the membersto space clearance spfiicient to permit the sand strips to be operated and by which the extreme ends of said strips are guided during their operation. i i i 12. The combination with a cope, of a sand strip withdrawable in straight lines having a. corner extension and sand strip operating means arranged to operatively engage said extension.

13. The combination with a cope and a withdrawable sand strip thereon; of means on the cope to support the cope at its corners when placed on its drag, corner extensions on the sand strip, and manually actuated sandstrip operating means in operative engagement with said extension.

14. The combination with a cope and its guide pins; of a withdrawable sand strip having a perforation of greater diameter than a cope guide pin and of suflicient length to permit the withdrawal of the strip.

15. The combination with a molders flask having guide pins for positioning the cope with respect to the drag, said pins mounted directly in the walls of the flask; of a withdrawable sand strip freefrom guide slots and having a perforation of greater width than the pins of sufficient length to permit the withdrawal of the strip.

16. The combination with a flask member and a guide pin; of a withdrawable sand strip having a perforation of greater diameter than said pin, said strip being cut away between said perforation and the inner edge of the strip.

17. A withdrawable beveled sand strip cut away at the corners of the flask to leave no impression at the corners of the sand ber; of corner plates at alternate corners,

and sand strips extending over two sides of said member, and means at the corner of each strip for actuating them, whereby the plates and corners of the strips are arranged at alternate corners of the flask member.

21. The combination With a flask member, of a Withdravvable sand strip having two portions, adapted to support the sand mold, at an angle to one another and having an extension outside of the member at the apex of the angle common to both of said portions and directed in the line of draft of the stri 255 The combination With a flask member having guide plates thereon, ofa sandstrip having a cut-away portion that will leave no impression in the sand mold, and also having its ends in sliding relation to said 15 guide plates, and an operating extension between the ends of the strip.

In testimony that I claim the foregoing as my invention, T have signed my name in.

presence of two subscribing Witnesses.

CHAS. O. W'OODJ Witnesses:

E. H. PARKINS, HENRY ORTH, Jr.

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