US1528278A

US1528278A - Slug-casting mold

Info

Publication number: US1528278A
Application number: US632824A
Authority: US
Inventors: Edward A Sytz
Original assignee: Mergenthaler Linotype GmbH
Current assignee: Mergenthaler Linotype GmbH; Mergenthaler Linotype Co
Priority date: 1923-04-18
Filing date: 1923-04-18
Publication date: 1925-03-03
Anticipated expiration: 1942-03-03

Description

Marga 19251.

E.A. SYTZ SLUG CASTING MQLD um" 'ma mmm, l I Il lum@ M BY

Patented Mar. 3, 1925.

UNITED STATES PATENT OFELQE..

EDWARD A. sYTz, or BROOKLYN, naw YORK, Assrenon To MERGENTHALER LINO- TYPEA COMPANY, A CORPORATION or New YORK.

SLUG-GASTTING IVIOLD.4

Application filed April 18,

To all whom t may concern.'

Be it known that I, EDWARD A. SY'rz, a citizen of the United States, residing at Brooklyn, in the county ofy Kings and State of New York, have invented certain new and useful Improvements in Slug-Casting Molds, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to typographical casting machines, such as linotype machines fof the generalorganization represented in U. S. Letters Patent to C). Mergenthaler, No. 436,532, wherein a typebar or slug is cast in a slotted mold and up against a composed line of matrices which vproduce the type characters thereon. In these machines, the mold usually comprises four distinct parts, namely, a body portion, a cap portion, and right and left hand liners, these parts defining the side and end walls of the mold'slot. The liners are produced in various lengths and thicknesses and are selectively employed to vary thedimensions of the mold slot according to the size of the slugs to be cast. However, for slugs of the larger sizes,such as those of the head-letter or display variety, the cap portion of the mold isI ordinarilyV formed with a series of tapered core sections in order to cast such slugs in skeleton form. In the use of a mold of this kind, it is essential that the liners register' at their inner ends with the core sections, as otherwise the molten metal will escape from the ends of the mold slot and produce an imperfect slug and lead to other more serious objections. VHeretofore, to meet this condition, it has been customary to make the core sections of varying sizes and to space them apart at irregular distances in accordance with certain definite lengths of liners. This practice, besides adding to the cost of manufacture, has given rise to many disadvantages in the use of the mold. For instance, it has materially limited the number of liners which may be used (practically excluding those of odd and fractional dimensions) and has consequently restricted the range of adjustment of the mold slot to a corresponding degree. Moreover, by reason of the small size and close spacing of some of the core sections, the tapering of the latter, which is desirable in facilitating the ejection of the slugs, is so limited that oftentimes the slugs be- 1923. Serial No. 632,824.

come wedged in the mold and cause. damage to the parts.v l I The present invention is intended toobviate the foregoing objections and contemplates a construction which will permit the use of liners of any desired lengths and which at the same timewill` enable the mold cap to be manufactured at less cost and with core sections having sufficient taper to provide for a smooth and easy eject-ion of the cast slugs. To this end, specifically, the mold cap is mounted so ars to. bey adjustable endwise relatively to the liners, the idea being to provide for the proper registration of they liners andcore sections for any-given adjustment of the mold slot. Thus, if, in changing the length of the mold slot, a substitute liner should terminate at itsinner end in the space between two adjoining core sections, an endwise adjustment of the cap in one direction or the other will bring the corresponding core section into proper reg istration with the liner and tlielj'cby prevent the escape of the molten metalfrom the end of the mold slot. By reason of this capability, 'there is no limitation` as to` the `number of variant liners which may be employed in adjusting the mold, and further there is no restriction as to the width, spacing or tapering of the corev sections, so long as the range of adjustment of the mold cap is sufficient to perform thek function above noted. In the pre-sent instance, and as preferred, the core sections are made of uniform size and are spaced apart at equal distances throughout the length of themold cap, due regard being had for a more pro nounced tapering of thecore sections. The exact construction and arrangement of the parts will be more fully set forth in the detailedd'escription to follow. i

Referring to the drawings:

Figure 'l is a front or face View of the improved mold; Y

Fig. 2 is a sectional plan View taken on the line 2-2 of Fig. l; V

Fig. 3 is a transverse vertical section taken on the line of Fig. l; and

Fig. 4 is a perspective View of a portion of a slug cast in the improved mold.

As' usual, the mold comprises a body por-v tion A and a cap portion B which define the opposite side Walls of the mold slot, and two intermediate liners C and .D which deline the opposite end walls of the slot. The

body portion A is fastened by screws or similar devices A1 to the well known rotary disc E (shown in dotted lines), and, at its opposite ends, it is provided with upright posts or lugs A2 passing through corresponding slots formed in the ends of the liners and the cap portion. The cap portion B is held in place by means of a pair of set screws El carried by the disc E and which, when tightened up, clamp the cap portion tightly down upon the two liners. In the present instance, the cap portion is formed in its front face with a longitudinal groove B1 and in its under face with a series of transverse grooves B2, leaving blocks or core sections B3 projecting into the mold cavity proper. The two liners C and D are of the customary L-shape and formed with fore and aft tongues or ribs C1 and D1, respectively, which engage in corresponding grooves formed in the upper Vface of the body portion A. As the parts are thus constructed and arranged, by loosening the screws E1, the liners C and D may be'quickly removed and replaced by others to effect a change in the dimensions of themold slot. To change the length of the mold slot only, it is merely necessary to remove the left hand liner C and substitute another of the required length, as the right hand liners do not ordinarily vary in length. The foregoing parts, except as hereinafter pointed out, are well known in the art and require no further description.

According to the present invention, the cap portion B is adjustable endwise in opposite directions relatively to the liners C and D, this being provided for by lengthening to the required extent the end slots wherein the posts A2 engage. In effecting such adjustment of the cap portion, the screws E1 are first loosened to release it and then tightened up to clamp it in its new position. By reason of this adjustability of the cap portion, the liners may be made of any desired lengths, whether in even or odd typographical units or fractions thereof. In l the drawing, the cap portion is shown as' shifted slightly to the right and with one of its core sections B3 in registry with the inner end of the liner C, so that the molten `metal when injected into the mold cavity cannot escape. Let it be supposed, however, that the liner C were replaced by another of such length that its inner end would terminate in a vertical plane located between two adjoining core sections B3 or in one of the grooves B2, as indicated by the dotted lines in Fig. 2. In such case, unless otherwise provided for, the molten metal would flow up into the groove and out beyond the end of the liner and thus produce on the slug an overhanging bar or fin which would interfere with the proper ejection of the slug and cause damage to the parts. In the present construction, however, this condition is avoided, as the endwise adjustment of the cap portion will locate one or another of the core sections in proper registry with the inner end of the liner, asin Fig. l. The advantage just mentioned would be present without regard to the form or arrangement of the core sections, but in the preferred embodiment illustrated, the core sections are larger and more widelyvspaced apart than heretofore, the size and spacing of said sections beingmade uniform throughout the length of the cap portion for purposes of economy in manufacture. As before, the core sections B2 are tapered both downwardly and forwardiy so as tofacilitate the ejection.v of the slug from the mold, but, in the present instance, the degree of taper has been materially increased, as permitted by the larger `size and wider spacing of the sections. As a result, the tendency of the slugs to stick or adhere to the core sections because of the shrinkage of the metal during solidication is reduced to a minimum, it being found in practice that a comparative ly light pressure is suflicient to dislodge the slugs from the mold. As a result, also, Vthe slugs themselves are much stronger and better adapted to sustain the load imposed thereon during printing or stereotyping.

Fig. l illustrates a portion of a slug cast in the improved mold, presenting as usual, a relatively thin body portion F, an overhanging face portion or shelf F1 and a series of transverse ribs F2` projecting from the body portion and giving support to the overhanging shelf. As will be observed, however, the ribs F2 .are of uniform size and equally spaced apart like theA grooves AB2 in which,

they are cast, and furthermore, ysaid ribs are thicker where theyv join the body portion F and overhanging shelf F1, due to the increased taper of the core sections B3 orto the greater iiare of the transverse grooves B2 incident to such increased taper.

It is old in prior constructions to adjust the cap portion endwise, but. such adjustment has been made to vary the length of the mold slot, involving a corresponding adjustment of one of the end walls of the mold. In the present construction on the other hand, the adjustment of the cap portion is not intended and actually does not change the length of the mold slot, the cap portion being adjustable relatively to the end walls of the mold to insure the proper cooperation between the said walls and the core sections.

In the accompanying drawings, the invention has been shown merely in preferred form and by way of example and as applied to a specific kind of mold, but obviously many changes and alterations may be made therein and in itsfmode of application without depart-ing from its spirit. Thus, the adjustable cap portion would also be useful in connection with non-adjustable molds, as when such molds are made with slots of different lengths and it is desired'to use a cap portion common to all. Again, the cap portion, instead of being integral as shown, might be divided horizontally in two sections, one fixed and the other adjustable, and the latter formed with core sections; or the core sections might be supported in any other suitable manner, so long as they are capable of being adjusted endwise of the mold slot for the purpose set forth. It should be understood, therefore, that the invention is not limited to any specific form or embodiment except in so far as such limitations are. speciiied in the claims.

Having thus described my invention, what I claim is:

1. A slug casting mold comprising side and end walls, one of the side walls being adjustable endwise relatively to the end walls.

2. A slug casting mold comprising side and end walls, one of the side walls being provided with core sections and adjustable endwise relatively to the end walls.

3. A slug casting mold comprising a body portion, a cap portion, and intermediate liners, the cap portion being adjustable endwise relatively to said liners.

4. A slug casting mold comprising a body portion, a cap portion formed with core sections, and intermediate liners, the said cap portion being adjustable endwise relatively to said liners.

5. A Islug casting mold adjustable as to the length of the mold slot and comprising side and end Walls, one of the side walls being adjustable endwise relatively to the end Walls for any given length of the mold slot.

6. A slug casting mold adjustable as to the length of the mold slot and comprising side and end walls, one of the side walls being formed with core sections projecting into the mold slot and adjustable endwise relatively to the end walls to insure the proper cooperation between the core sections and thev end walls for any given length of the mold slot.

7. A slug casting mold comprising side and end walls and having core sections projecting into the mold slot, the said core sections being mounted with a capacity for adjustment endwise of the mold slot independently of the end walls to insure the proper cooperation between said parts.

8. A slug casting mold comprising side and end walls, one of the side Walls being adjustable endwise relatively to the end walls and provided with core sections of uniform size throughout.

9. A slug casting mold comprising side and end walls, one of the side walls beingV adjustable endwise relatively to the end walls and provided with core sections spaced apart at equal distances throughout the length of the mold.

In testimony whereof, I have afixed my signature hereto.

yEDWARD A. SYDZ.