Title:
Matrix-setting and type linecasting machine
United States Patent 2189098


Abstract:
The invention relates to an improved process for the production of completely cast type-line bodies for matrix-composing and type-line casting machines and the arrangements for carrying *5 out this process. The type-lines produced by the so-called complete casting process, that is to say, the...



Inventors:
Kurt, Bendorff
Otto, Bieber
Kurt, Dahnert
Application Number:
US27573639A
Publication Date:
02/06/1940
Filing Date:
05/25/1939
Assignee:
Firm, Typograph G. M. B. H.
Primary Class:
Other Classes:
199/60
International Classes:
B41B11/52; B41B11/72
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Description:

The invention relates to an improved process for the production of completely cast type-line bodies for matrix-composing and type-line casting machines and the arrangements for carrying *5 out this process. The type-lines produced by the so-called complete casting process, that is to say, the finished casting process, are distinguished by the fact that they leave the casting mould as completely finished bodies, and after '10 the casting no further mechanical treatment of the surfaces thereof is required with the exception of a small trimming at the edges of the faces, which does not affect the bottom and side surfaces of the type-line bodies. The base of the type-line bodies is formed by a ledge extending along the side surface and two transverse feet situated at the ends of the lines, while the runner, that is to say, the breaking point remaining after the removal of the casting head or the waste in the type-line body, is sunk with respect to the base of the type-line and therefore does not detrimentally affect the stability of the typeline body. This form of type-line base is obtained by means of a casting slot, shortened at its ends by an amount equal to the length of the transverse feet with respect to the length of the type-line, within the so-called intermediate plate provided in known manner between the mould and the casting mouth of the casting pot. This 80 known successful complete casting process has, however, disadvantageous influences in that the stream of metal entering the mould does not reach the ends of the lines in the mould, in which eddies, air bubbles and therefore pipings .*M or porous points are readily formed within the type-line bodies. Apart from this, the aforesaid known method of producing completely cast type-lines is one of the principal reasons for which it has hitherto been impossible to develop '40 a simple casting mould which ensures the complete casting and may be similarly employed for all line lengths. The many methods by which it has been endeavored to achieve this object with very complicated mould constructions have been unsuccessful and could not be adopted in practice because of the unsatisfactory results always obtained. The hitherto usual process has therefore been retained, by which each casting mould can only be made adjustable within the small range determined by the length of the feet at the ends of the lines. This adjustability is, as is known, obtained by employing the socalled end miembers or inserted members limiting the length of the lines, that is to say, at the ex0US pense of the end feet of the lines, which are thus variable from a maximum length to a minimum length. The casting of the lines is most favorable when the end feet have reached their minimum length, so that the length of the line and the casting slot in the intermediate plate only differ slightly from one another.

The aforesaid disadvantages of this hitherto usual complete casting process are overcome by means of the process according to this invention, by means of which it is possible to so produce completely cast type-line bodies that one and the same casting mould of any desired adjustability of length and corresponding adjustability of body size may be employed without the quality of the cast type-line body or the completely .cast property or stability thereof being detrimentally affected. This object is achieved owing to the fact that the intermediate plate does not, as hitherto, cause the formation of the transverse feet of the type-lines owing to the arrangement of its casting slot shortened at the ends with respect to the length of the lines, but according to the invention this object is achieved by the waste-ejecting device or a waste ejector suitably constructed and arranged for this purpose, which co-operates with the casting mould and the intermediate plate and is controlled thereby during their opposite displacement. The plate-like waste ejector hitherto employed, which penetrates from the side of the mould into the casting slot of the intermediate plate after the separation of the type-line body, cannot be employed for the purpose which it is desired to achieve according to the invention, particularly as the known waste ejector has the disadvantage that it is very readily jammed, warped, damaged or destroyed, while it not infrequently itself causes damage to, the casting slot of the intermediate plate and may easily lead to considerable disturbances as a result of splashing of lead or negligence.: All these disadvantages are overcome by the waste-ejecting device according to the invention, which is now employed also for the production of the transverse feet of the lines for the purpose of carrying out the complete casting process and consequently operates in accordance with an improved principle. The actual waste ejector is to a certain extent so arranged in the intermediate plate as a part thereof that it presses with an inclined surface moving perpendicularly with respect to the casting slot against a corresponding inclined surface of the wedge-shaped line waste by which it is surrounded and thus forces this waste out of the casting slot without itself entering the slot in a direction opposite the casting direction as has hitherto been the case.

It is thus possible for the first time by the arrangement according to the invention, in spite of the fact that the complete casting is the same for all lines, to retain in a simple manner the unlimited adjustability of the casting mould both in the direction of the length of the lines and to a sufficient extent with regard to the body thickness without the mould itself or the intermediate plate, which is now the same for all sizes, having to be exchanged with the waste ejectors. It is then possible without departing from the scope of the invention to distribute over the entire line length one or more, for example preferably two, ejectors which engage the waste and ensure the reliable regular ejection thereof from the intermediate plate. In this way, two full transverse feet are consequently simultaneously formed with long lines; while in the case of short lines only one such complete transverse foot is formed, which is situated in the neighborhood of the center of the line if the waste ejector is suitably arranged. The stability and even the completely cast property which renders unnecessary any further treatment of the type-line bodies are not detrimentally affected in this way. The presence of only one foot in the case of short lines is, on the con80 trary, advantageous with regard to the casting operation and consequently with regard to the product thereof, that is to say the type-line body, since a more favorable ratio of the length of the effective casting slot in the intermediate plate U through which type metal flows, to the length of the line and the length of the casting slot of the casting mould is then obtained than would be the case if two transverse feet were also present in the case of short lines. A further particular advantage of the process resides in that in each case, in spite of the complete casting, the line ends are also completely cast, so that no "dead" corners filled with compressed air and tending to produce eddying and piping are formed at the 46 ends.

A construction of the invention is shown diagrammatically in the accompanying drawings, in which: Figure 1 is a view of the waste-ejecting device in the direction of the intermediate plate, Figure 2 is a plan view of the device shown in Figure 1, Figure 3 is a section on the line III--I of Figure 1, showing the parts in the casting position, that is to say, before the commencement of the separation of the line waste, Figure 4 is a similar section to that of Figure 3, but showing the parts in the position corresponding to the line-ejecting operation after the 6o ejection of the waste, Figure 5 is a section on the line V-V of Figure 1, showing the parts in the casting position shown in Figure 3 before the separation of the line waste, Figure 6 is a view of the intermediate plate from the side of the casting mould, Figure 7 is a perspective illustration of a waste ejector removed from the intermediate plate, on a larger scale, and Figure 8 is a perspective illustration of a typeline body provided with the complete cast foot according to the invention.

As usual, the mould holder I is rotatably mounted in the machine frame on the shaft 2 and carries at its upper end the line-casting mould consisting substantially of the two jaws 3 and 4, the lower jaw 3 of the mould being secured, for example, by means of screws 5 to the holder I, while the upper jaw is firmly connected in known manner by screws 8 to the lower jaw 3 after the interposition of line end members or inserted members not shown, at such a distance as to form the mould slot 6 for the metal flowing in and forming the type-line body 1 after solidification. Bearing tightly against the mould 3, 4 and adapted to be displaced to a limited extent with respect thereto is the so-called intermediate plate 9, which may be guided in angle members 10 firmly screwed laterally to the mould 3, 4.

The intermediate plate 9 is so constructed in known manner that, as may also be seen from Figure 5, its upper part, which is connected to the upper jaw 4 of the mould, is elevated in the direction of the mould with respect to the part connected to the lower jaw 3 of the mould, in order thus to form the ledge 12 (see Figure 8) characteristic of the complete casting on the base of the type-line body 7 during the shearing off of the line waste 11 by the upward displacement of the intermediate plate 9 in the direction of the arrows A in Figures 3 and 5.

In the intermediate plate 9 are provided the known three recesses 13, 14 and 15, the lower recess 13, which does not extend completely through the plate 9, being in engagement with the driv- o30 ing member not shown here which withdraws the intermediate plate 9 into its casting position while the center longitudinal slot 14 extending through the intermediate plate 9 over the entire length of the mould slot 6 with an equal width thereto 53 is, in the usual way, so arranged that, after the displacement of the intermediate plate 9 into its upper end position which in known manner is reached after the complete return of the mould holder I in the direction of the arrow B in Fig- -:4 ure 3, lies in a completely coincident position with the mould slot 6, in order thus to permit the penetration of the line ejector not shown here through the slot 14 in the plate 9 into the slot 6 of the mould 3, 4 for the purpose of eject- i5 ing the type-line body 7 which has solidified therein. The upper longitudinal slot 15 of the intermediate plate 9 represents the casting slot and is so conically constructed in known manner that the side thereof communicating with the cast- d0 ing slot S of the mould 3, 4 only forms a narrow aperture, while the side communicating with the casting pot is wider (see Figure 5) in order to facilitate ejection of the waste piece 11 sheared off from the type-line body 7 in this di- 5 rection. The casting slot 15 of the intermediate plate 9, however, is not, as previously, shortened at the ends with respect to the casting slot 6 of the mould 3, 4, but it permits over the entire length of the'line, and in particular at the liner ends, .a substantially rectilinear and eddy-free' injection of the molten casting metal. In one or more, preferably two, guide grooves 16 facing towards the mould in the intermediate plate 9, which start from the lower edge of the said plate do not extend over the entire height thereof, the actual line ejectors 17 are guided so as to be displaced to a limited extent, as may be seen from Figures 1, 3, 4 and 6. These line ejectors 17 constitute prismatic bodies, as shown in Figure 7, each having, a wedge-shaped recess 18 as shown in Figures 3, 4 and 7. The arrangement is such that when the parts are in the position corresponding to the casting operation as shown in Figures 1 and.3, the wedge-shaped recesses TS 18 of the waste ejectors 17 are situated exactly in front of the casting slot 15 of the intermediate plate 9. That surface of each ejector 17, which in this position lies opposite the casting slot 15 or the recess 18 and covers the mould slot 6, is so fashioned that there is formed over the width thereof a complete transverse foot 19 also extending over the entire thickness of the typeline body 7, the upper surface of the said transverse foot lying completely in a plane with the upper surface of the ledge 12 of the line base.

Consequently, if two waste ejectors 17 are employed over the length of the line, the completely cast foot of a line 7 shown in Figure 8 is ob16 tained. The waste ejector 17 extends with a projection 20 provided at its upper end into a corresponding recess 21 in the upper jaw 4 of the mould, and during the casting all the parts take up the position shown in Figure 3.

SO The arrangement is such that when the intermediate plate 9 is displaced in the direction of the arrow A in Figures 3 and 5, the waste ejector 17 also moves a short distance in the same direction together with the intermediate plate 9 until as the projections 20 thereof strike against the upper closed ends of the recesses 21 inside the mould jaw 4, so that from this instant the waste ejectors 17 cannot follow any further displacement of the intermediate plate 9 with respect to So the mould 3, 4.

Therefore, if the casting operation takes place with the parts in the position shown in Figure 3, the waste ejectors 17 are surrounded by the molten metal and to a certain extent cast in the * line waste 11. They consequently form a part firmly secured to the intermediate plate 9 by this waste. When the usual pivoting movement of the mould holder I in the direction of the arrow B in Figure 3 commences immediately the type-line bodies 7 and the waste 11 are solidified after the casting operation, the intermediate plate 9 being shifted in known manner in the direction of the arrows A in Figures 3 and 5 with respect to the mould 3, 4, the waste ejectors 17 cast in the waste II also move at first-that is to say, while the intermediate plate 9 is shearing off the entire waste piece 11 from the type-line body in the direction of the arrows A-in the same direction. The projections 20 thereof thus ,0 move from the position shown in Figure 3 inside the recess 21 of the mould jaw 4 until they have reached the position shown in Figure 4 and bear against the upper closed ends of the recesses 21. At this instant, however, the waste II is al85 ready completely separated from the type-line body 7 and is situated above the mould slot 6, while the intermediate plate 9 has not yet reached its upper end position. The line-ejecting slot 14 of the intermediate plate consequently is not g0 yet in a coincident position with the mould slot 6. The slot 14 reaches the said coincident position with the slot 6 after the further movement of the intermediate plate 9 in the direction of the arrow A when it has reached its upper end position shown in Figure 4. However, the waste ejectors 17 bearing with their projections 20 firmly against the mould jaw 4 cannot take part in this further movement. Consequently, the intermediate plate 9, with the waste piece II situated therein, is now also displaced relatively to the fixed waste ejectors 17, and the upper inclined surfaces of their wedge-shaped recess 18 press against the corresponding inclined surfaces of the waste piece II which, as a result of this wedging action, they lightly detach from the walls and force somewhat out of the conical casting slot 15. In order that the waste piece II separated from the type-line body and forced somewhat outwards through the wedge-shaped recesses 18 in the waste ejectors 17 may readily fall out of the casting slot 15 upon the further movement of the intermediate plate 9 and may not be firmly clamped laterally against the waste ejectors 17 owing to the shrinkage occurring during the cooling, these waste ejectors are tapered, for example by means of recesses or chamfers 22 provided immediately above their wedgeshaped recesses 18 on the edge facing towards the casting pot, as is clearly shown in Figure 7.

Therefore, as soon as the waste piece 11 separated from the type-line body 7 moves upwards into the range of the aforesaid tapers or chamfers 22 during the further displacement of the intermediate plate 9 relatively to the waste ejectors 17 held fast by their projections 20, it loses any lateral support in its recesses corresponding to the ejectors 17 and therefore falls freely out of the casting slot 15 of the intermediate plate 9. The type-line body 7 naturally cannot be affected detrimentally by the above-described ejection of the waste piece 11, because the type-line body is already separated from the waste piece II before the commencement of the actual ejecting operation, in order then to be forced out of the mould 3, 4 by the known line ejector not ,3 shown, which passes through the slot 14 in the intermediate plate 9 into the mould slot 6.

During the next working operation, that is to say, when the mould holder I and the parts connected thereto are again pivoted into the cast-;35 ing position shown in Figures 1, 3 and 5 the intermediate plate 9 also carries the waste ejector 17 during its displacement, back into its lower end position corresponding to the casting position. In order to permit ready joining together of the parts and a rapid insertion of the intermediate plate 9 from above into their guide angles 10, clamping springs 23 or the like preferably are provided for holding fast the waste ejectors 17 in their position corresponding exactly to the grooves 16 in the intermediate plate 9, these springs being secured inside the recesses 21 of the upper mould jaw 4 and gripping therein the projections 20 of the waste ejectors 17 inserted in their correct position.

Having thus fully described the invention what is claimed as new and desired to be secured by Letters Patent is: 1. Apparatus for the production of completely 65 cast type-line bodies, comprising a mould, a slot in said mould for the reception of molten metal, an intermediate plate displaceable along the face of said mould, a casting slot in said plate cooperating with said mould slot for the introduction of molten metal to said mould slot, the cooperating faces of said mould and said intermediate plate on one side of said mould slot being off-set with respect to the cooperating faces on the other side of said slot, whereby a ledge is 06 formed on the base of the cast type-line body, means slidably mounted on the inner face of said intermediate plate for producing a transverse foot intermediate the ends of the cast typeline body, said foot extending across the entire thickness of said cast body and connected at an equal level to said ledge, and means for controlling the extent of movement of said slidable means during the displacement of said intermediate plate, for ejecting the waste. 2. Apparatus for the production of completely cast type-line bodies, comprising a mould, a slot in said mould for the reception of molten metal, an intermediate plate displaceable along the face of said mould, a casting slot in said plate cooperating with said mould slot for the introduction of molten metal into said mould slot, the cooperating faces of said mould and intermediate plate on one side of said mould slot being off-set with respect to the cooperating faces on the other side of said slot, whereby a ledge is formed on the base of the cast body, transverse grooves in the inner face of said intermediate plate extending perpendicularly through ,15 said casting slot from the lower edge of said plate to a predetermined point adjacent the upper edge thereof, and means guided in said grooves for forming transverse feet intermediate the ends of the cast body which extend across *20 the entire thickness of said body and connected at an equal level to said ledge.

3. Apparatus as claimed in claim 2 wherein said last named means are slidably mounted in said grooves and displaceable therein to a limited extent during the displacement of said intermediate plate.

4. In apparatus for the production of completely cast type-line bodies provided with a ledge on the base thereof, of the type including .30 a mould provided with an adjustable mould slot, an intermediate plate displaceable along the face of said mould, and a casting slot in said plate cooperating with said mould slot for the introduction of molten metal to said mould slot; the "35 improvement which consists in means for ejecting waste and for forming transverse feet across the entire thickness of said cast body intermediate the ends of the latter, which feet are connected to said ledge at an equal level, comprising transverse grooves on the inner face of said intermediate plate, waste ejecting devices mount-  ed in said grooves and displaceable to a limited extent with said intermediate plate, and a wedgeshaped recess in each of said devices in line with the casting slot in the casting position of the apparatus, for ejecting the waste line through tiJ said casting slot.

5. Apparatus as claimed in claim 4 including means on said waste ejecting devices cooperating with said mould, for limiting the movement of said devices during displacement of said intermediate plate.

6. Apparatus as claimed in claim 4 including means on each of said waste ejecting devices for freeing the waste line from said ejecting devices.

7. Apparatus as claimed in claim 4 including , a projection on the upper end of each of said waste ejecting devices cooperating with a recess in said mould for limiting the movement of said waste devices during displacement of said intermediate plate, whereby the line waste will be 4T freed from said devices and forced out of said casting slot, and means in said recess for positioning said devices in said grooves.

8. Apparatus as claimed in claim 4 wherein said waste ejecting devices are arranged in said C; intermediate plate at a point intermediate the ends of the casting slot.

KURT BENDORFF.

OTTO BIEBER.

KURT DAHNERT.