US2172854A - Casting mold for type casting machines - Google Patents

Description

Sept. 12, 1939. J SCHNEIDER 2,172,854

CASTING MOLD FOR TYPE CASTING MACHINES I Filed May 3, 1938 2 Sheets-Sheet 1 ulws 'lkneider N ENTcfi.

mm ATTY Sept. 12, 1939.

- J. SCHNEIDER 2,172,854 CASTING MOLD FOR TYPE CASTING MACHINES Filed May 3, 1958 2 Sheets-Sheet 2 fi 5 72 I I I m2 W Julius bhflGidGr lNVENTOc Patented Sept. 12, 1939 UNITED STATES CASTING MOLD FOR TYPE CASTING MACHINES Julius Schneider, Munich, Germany Application May 3, 1938, Serial No. 205,665

In Germany May 13, 1937 Claims.

Casting molds are known which enable single letters of different width to be cast consecutively in accordance with the difference in width of the characters. These casting molds possess a mov- 5 able part limiting the cross section of the mold which adjusts itself according to the width of the character to be cast, thus e. g. in casting theletters i, f on a narrow cross-section, in casting the letters m, w on a correspondingly larger cross section.

Now the need has become apparent to be able to change also the size of type or body with such casting molds without having to interchange the entire casting mold or portions of'same.

To satisfy this need it has already been proposed with four parts forming the cross section of the casting mold to arrange one in directions standing vertically on one another and two more, each movable in one of these directions. The measures taken with these arrangements for removing the finished casting from the mold are of a complicated nature and may easily lead to the casting being damaged.

According to the present invention also the fourth part limiting the cross section of the casting mold is arranged movable in such a manner known in itself-that after the casting has been completed it opens the cross section of the mold, clamps the casting at its back after the latter 30 has been pushed on its path by another part of the mold, and conveys it into the path of a pusher of the known kind. This fourth part of the mold is conveniently fitted with an elastic holding number which unlocked after clasping the casting 35 at its back by the part of the mold clamps the casting and secures it on its path, until it is disengaged by the pusher and locked again.

The attached figures show diagrammatically one example of execution in Various positions,

viz:

Fig. 1 in the initial position, some parts being shown in section;

Fig. 2 in the position when a type isbeing cast;

Fig. 3 in the position after casting;

Fig. 4 in the position after the type cast has been ejected, and

Fig. 5 a special form of execution of the two mold-parts movable for altering the width of the cross-section of the casting mold in transverse section.

The casting mold consists of immovable parts I, 2, 3, 4, 5 arranged on a basis-plate and forming so to speak a frame and guidances for the movable parts. Between the immovable parts the movable parts 6, 1, 8, 9, l0 are arranged; part 6 is a pressing piece acting on part 1, Whilst the parts I, 8, 9, H] are destined toform and indicate the cross-section of the casting mold. In Fig. 1 the casting mold is not yet formed, in Fig. 2 the cross-section of the casting mold is distinguished by cross-hatching, in Figs. 3 and 4 the rectangle in cross-hatching represents the cast letter. fluence of a spring I! which braces against the firm part I and presses the part 8 of the mold against part I of the mold. Opposite the spring II at the firm part 4 of the mold there is an adjusting screw I 2 acting on the pressing piece 6 and by means of which it is possible to displace the parts I and 8 of the mold opposing the action of spring I l in direction of the arrow E3. By turning the adjusting screw I2 in opposite direction the spring H causes a retrograde motion of the parts 1 and 8 of the mold in opposite direction of the arrow I3. By turning the screw it is rendered possible to change the size of the type or body. At part 2 a spring-loaded rail M is fastened which presses part 9 against part 8; in the same manner part II] of the mold is pressed by a springloaded rail l5 of the fixed part 3 against parts 2 and 9, and part 1 of the mold against the part 8 of the moldby a spring-loaded rail N5 of part 8. The directions of motion of the parts 9 and ID of the mold are marked by double arrows; the part 1 of the mold is movable apart from the direction of the arrow l3 and from the opposite direction also vertically to same. The part 9 of the mold carries in a recess 9a provided at its forward end a swingable holding-clamp I I having for its purpose to hold the cast letter in position after leaving the casting-mold until it has got into the path of a pusher l8 and is gripped by the latter. The clamp ll is loaded by a spring 23 which normally acts upon an abutment face 24 of the clamp H, (see Figs. 1,2 and 4) to retain the latter in its rest position. A pin 25 is rigidly secured to the base plate of the mold and is accommodated by a groove 29 in the wall part 9 when the latter is displaced in downward direction. Lever l9 serves to impart to part 1 of the mold the motion vertical to the direction of the arrow, which motion has for its purpose to adjust the casting mold corresponding to the width of the characters. A wedge 20 sliding along a guidance 2| determines through its position at the time the movement to be given part 1 of the mold in the sense of the opening of the casting mold, and thus the adjustment of the casting mold according to the width of the character to be cast.

The part 8 of the mold is under the in The working method of the casting mold is as follows: First the parts 6, I and 8 are displaced so far opposite the line 19-0 of the part II] of the mold by turning the screw l2 that the desired size of body is formed. By the distance ab also the measurement of the size of type (size of body) to be cast is determined. If ab becomes larger, the type increases likewise; if a and b coincided in one point, the height of the type would be zero. By turning screw I2 in opposite direction of the clock the spring II causes the retrograde motion of the parts 6, 1 and 8, so thatit is also possible to change over in the opposite way from a larger to a smaller body. The exact adjustment of screw to certain heights of body is, of course,

secured by marks, stops etc. It is just as self-understood that matrices corresponding tothe size of body adjusted at the time are employed; if e. g.

a casting machine is concerned with acirculating matrix-Wheel, either a wheel is inserted with matrices corresponding to the desired size of body, or a wheel possessing several rims of matrices of different size beside one another is arranged accordingly opposite the casting mold.

In the position of Fig. l the casting mold is completely closed; the casting orifice 22 is covered by the part 1 of the mold; wedge 20 is in position of rest. Now first wedge 20 is displaced downwards in the known manner depending on the width of the character to be cast by the amount determined thereby. This new position of wedge 20 now gives part I of the mold the possibility of moving so far towards the left by moving lever l9 in the sense of the clock, until it touches with its outer end the wedge surface 20. At the same time the part I of the mold has moved underthe influence of a spring (not shown) with part I of the mold towards the left, so that the casting mold is now opened corresponding to the width of the character, and the casting may be performed.

This is the position shown by Fig. 2; it may be seen from it, how part I of the mold adjoins wedge 29, how part In of the mold has followed the motion of part 1 of the mold towards the left, and how the cross section of the casting mold indicated by cross hatching and enclosing the cast character has been formed. Now part 9 of the mold is first retracted upwards, in the direction of arrow 26. During this movement, the pin 25 presses against the clamp l1 and pivots the same downwardly, until the point of the clamp I1 rests on the rear face of the cast character. In this position, the spring 23 overlies the back of clamp l1 and causes the latter to grip the cast character. Subsequently part I of the mold is moved towards the right by lever l9, until its right edge is in one line with the right edges of the parts 8 and 6, whilst part 10 of the mold is drawn to the right by some means (not shown), until'its left edge is in one line with the left edges of parts 2 and 3. Wedge 29 returns in the meantime to its initial position. These conditions of position are to be seen from Fig. 3.

Now part 9 of the mold moves downwards (the discharge-pin being cut off in the known manner), until the lower edge of part 9 of the mold forms one line with the lower edges of the parts 3 and 4 of the mold, whilst the cast letter is taken along and secured against toppling over by the spring-loaded clamp. The cast letter now lies in the path of the pusher l8 moving in the direction of the arrow (Fig. 3), taking along the letter and at the same time pressing the-claw I! back into the recess of the part 9 of the mold,

where the claw is locked again by spring 23, until the process starts afresh. These conditions of position are apparent from Fig. 4.

After the ejected character has reached its destination, the pusher l8 returns to the position of rest, as does also part 9 of the mold into the position of Fig. 1. Not before part 9 of the mold has reached this position of rest, also part H] can return to its position of rest (Fig. 1) in which it adjoins part I of the mold and closes the casting mold.

Of course, withthe casting mold described not only the characters, but also the spaces are cast. In this connection it is desirable that the spaces orrule ornaments are only of height-to-shoulder, that is shorter than the types to avoid blank print'by the spaces. For this purpose the parts of the mold I and I9 serving to alter the width I of the cross section of the casting mold are subdividedin the known manner by height into parts 1 and 1 and Ill and It! (Fig. 5) respectively. Part 1 is movable in relation to part 1 and so is part H1 in relation to part I9 With type-casting the parts 1 and 1 and I0 and NJ are coupled together, so that the parts of the mold are acting singly in the manner described above. With space casting, however, part I is disengaged from part 1 and likewise part I0 from part it which is effected automatically in any desired manner. Then only the lower parts i and H3 cooperate in forming the casting mold, whilst the upper parts 1 and I 0 cover the casting mold. With other words, after adjustment of the casting mold the upper parts 7 and 50 are in the position of rest of Fig. 1, whilst the lower parts I and I9 occupy the position of Fig. 2. The cast spacing piece becomes then shorter by the amount of the thickness of the parts 1 and I0 than the cast type. For greater clearness the parts of mold I I and the parts of mold I0 and I9 are represented as being separated from one another in Fig. 5; practically, however, according to the above parts T and It! form the cross section of the casting mold, whilst the upper parts 1 and I0 join. Of course, part 9 of the mold must not be higher than part I9 so that it may pass below part I0 What I claim is:

1. A casting mold for type casting machines comprising four wall parts defining the cross-section of the casting'mold and a pusher member, one of said wall parts 1 being adjustable in one plane and reciprocable in a second plane at right angles to said first plane, the second wall part 8 being adjustable in said first plane, the third wall part It] being reciprocable in the second plane, and the fourth wall part 9 being reciprocable in a plane parallel to said first plane to open the mold after completion of the casting, said fourth part being adapted to grip the completed casting and to carry the same into the path of said pusher member.

2. A casting mold, as claimed in claim 1, comprising a spring biased clamp pivoted to the forward end of said fourth wall part and means for adjustingv said clamp to its operative position when said fourth part is displaced to open the mold.

3. A casting mold, as claimed in claim 1, comprising further a pressure plate 9 supporting said first wall part I for sliding reciprocation between itself and said second wall part 8 and an adjusting screw [2 for changing the position of said pressure plate, said'first 'wall part and said second wall part in said first plane.

4. A casting mold, as claimed in claim 1, comprising further spring loaded guide rails for each of said reciprocable wall parts, each of said rails being adapted to press the wall part guided thereon against one of the other wall parts.

5. A casting mold, as claimed in claim 1, in which said first and said third wall parts each comprise two superposed portions movable with respect to one another and adapted to be coupled and uncoupled, whereby in uncoupled condition only the lower portions participate in forming the mold for casting spaces, the upper portions 5 serving as cover for the mold.

JULIUS SCHNEIDER.

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