US1291259A - Metal-casting machine. - Google Patents

Description

I J. 3. THOMPSON.

METAL CASTINGIMACHI'NE.

' APPLICATION Fi LED Aue. H. 1911.

la li' Patented Jan. 14, 1919,

JOHN S. THOMIPSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THOMPSON TYPE MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METAL-CASTING MACHINE.

To all whom it may concern:

Beit known that I, JOHN'S. THOMPSON, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented new and useful Improvements in Metal-Casting Machines, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to metal-casting machines, and has to do more particularly with so-called typerasting'machines which will produce, by means of a series of separate castings fused together, continuous strips of material for use in the printing art, such, for instance. as leads, rules, and the like. These rules, leads, etc., are usually thin, ribbon-like structures, being cast in various thicknesses, sometimes as thin as .028 of an inch. Hitherto, in molding machines of this kind a reciprocatory ejector blade has been provided for ejecting the sections of the caststrip so as to clear the n'iold-cavity for the next injection of molten metal. A moving ejector of this character is objectionable, whether thin or otherwise, and is particularly objectionable Where thin strips of lead, .028 of an inch, are cast. Such an ejector blade must have a very snug lit to begin with, and its fit must be so maintained in order to prevent themolten metal from running in between the ejector blade and the surrounding supports in which it slides.

One of the objects of my invention is to obviate the use of the ejector blade, and instead I provide a mold-block having a mold cavity, movable across the face of the molten metal inlet, the transverse cross-section of which is preferably the same as the t'ans-' verse cross-section of the strip, and so shaped that an edge of the mold-cavity advances the last section of the strip upon each reciprocation of the mold-block, means being provided to hold the strip during the return moven'ient of the mold bloclr to clear 7 together with the strip-holdmg means, acts Metal the mold-cavity for the next injection of molten metal. Thus, the'mold-block itself Specification of Letters Patent; Patented J 14 1919, Application filed August 11, 1917.

Serial No. 185,737.

)an in drawin s in which various modifications of my invention are shown and inwlnch- Figure 1 is a longitudinal. transverse section of one form of my invention;

Fig. 2 is a transverse section along the line 2-2 of Fig. 1;

Fig. 3 is another form of my invention;

Fig. 4 is a transverse line of Fig. 3;

Fig. 5 is another form of my invent-ion;

Fig. 6 is a transverse section along the line 6-6 of Fig. 5;

Fig. 7 is still another form of my invention; and

Fig. 8 is transverse section along the line 8-8 of Fig. 7.

Referring now more particularly to the form of my invention as shown in Figs. 1 and 2, it comprises a mold-block 1- supported between guides 2 and 3, there being section along the relative reciprocatory movement between connected to the mold-block 1 and adapted to be connected to abell-crank of some sort so as toreciprocate the mold-block 1. A box-l1ke mold-cavity 5 is'provided 1n the mold-block 1, the transverse cross-section of which is preferably the same as the trans verse cross-section of the strip 6 which is being cast. This cavity 5 is open at its outer end and is provided with an inner edge 7, this inner "edge acting to advance the strip as the mold-block is reciprocated. To prevent the strip 6 from returning upon each. return movement of the mold-block 1, I pro'- vide a stripper la in the shape of a springiinger or yieldingly-held checlepawl.

For the purpose of feeding the molten metal, I provide a metal pot 8 of any wellknown construction, and for this purpose a pot may be used such as is shown in my Patent No. 1,029,243 of June 11, 1912, entitled pot; for type-casting machines, and

patent is so arranged that the small metal feedingport 9 therein is automatically opened and closed to allow the molten metal. to fill the cavity 5 and the jet 11, Where such a. jet is, used. c This construction is well known and therefore I will not attem t to describe in detail the operation thereo the like. The metal pot shown in this i In the form of my invention .shown in Figs. 1 and 2, the block 3 is provided with a jet-opening 11 which increases to the width of the cavity 5 as shown in' Fig. 2. The member 12, which acts as a wall for one side of the jet-opening 11, has a vertical reciprocatory movement so as to permit the jet to be advanced with the strip 6. This member 12 is, of course, moved out of the way just before the mold-block 1 starts to advance. This construction is also well known and therefore I will not describe herein any particular mechanism required forthis purpose, but will simply state that it'is only necessary that the portion 12 be dropped out of the way of the jet 10 before the strip 6 is advanced, and after the last-cast portion of the strip 6 has been advanced and before the next portion of molten metal is injected,

the block 12 is again moved upwardly into *place. A suitable arrangement for performmg this operation is shown in a pending application Serial No. 128,3&2, for casting machines.

In Fig. 2, which is a transverse section along the line 22 of Fig. 1, the jet-opening 11 is shown in the side of the block 3, the jet-opening being so shaped as to permit a ready flow of molten metal to the moldcavity The movable member 12 is shown in dotted lines in this figure, the view'being taken along line 2-2, which is back of the block 12.

Each reciprocation of the mold-block 1 brings the edge 7 of the mold-cavity 5 march- I cally on a line with the right-hand edge of the jet-opening 11 (Fig. 1) so that upon the tion I have referred to a ribbon-like strip.

as being cast, but it will be apparent that my invention may be employed in making strips of transverse cross-section other than ribbon-like.

Figs. 3 and 4.

In Figs. 3 and 4 another form of my invention isshovvn, in'which the jet-opening carrying-block 3fis movable with and thus forms part of the mold-block 1, instead of being stationary as in Fig. 1. The member 12,

" however, is vertically movable sojas to allow the jets 10 to be advanced with the strip 6.

It is thought the operation of the form shown in Figs. 3 and 4; will be readily understood in view of the description of Figs. 1 and 2.

' Figs. 5 and b.

In Figs. 5 and 6 another modified form of my invention is shown, in which the nozzle of the metal pot 8 is positioned close to the mold-cavity in the mold-block 1, so that a continuous strip 6 is formed without any projecting jets 10. In this case the stationary block 3 also acts as a guide for the moldblock 1, which is adapted to be reciprocated as in the forms already described. In this form the metal feeding-port 9 is placed so that the metal is fed directly to the moldcavity without the intervention of a j ct-opening. As the strip 6 is idvanced the stripper or pawl l-l prevents the return movement thereof.

Figs. nd 8.

In the form shown in Figs. 7 and 8 the strip 6 is cast lying in a horizontal position, as distinguishin from the vertical position of the forms already described. In the present form the molten metal is injected from an edge side of the strip. The nozzle of the metal pot is also preferably positioned immediately adjacent the edge'of the strip, so that no projecting jet is cast.

It is thought the operation of the form shown in Figs. 7 and 8 will be apparent in view of the description already given of the other forms.

For the purpose of illustrating my invention, I'have shown a mold for casting strips of ribbon-like structure, but it will be apparent that my invention is not by any means limited to this shape. of strip, and

' that the crosssectional shape may be varied and determined by the shape of the cavity in the mold :block. I also aim to apply my invention in other ways than that shown, and appreciate that many changes and modifications will readily occur to those skilled in the art, and therefore I do not desire to be limited to the structure shown and described, but im to cover all that which comes within the spirit and scope of the appended claims.

I claim as new and desire to secure by Letters Patent of the United States:

l. A machine for casting strips of metal comprising a metal feeding-inlct, a moldblock having a mold-cavity arranged to have a portionof the strip casting always remain therein movable across the face of the inlet, means for imparting relative rcciprocatory movement to the inlet and mold-block, said mold cavity being shaped to advance the strip upon'each reciprocation, and means for holding the strip during the return movement of reciprocation to clear the cavity.

2. A machine' for casting strips of metal comprising a metal feeding-inlet, a mold-., block having a mold-cavity movable across or check-pawl for holding the strip against reciprocation. A

4. A machine for castingstrips of metalcomprising a metal feeding-inlet, a mold block having a mold-cavity movable transversely of the face of the inlet, a stripper or.

check-pawl, and means for reciprocating the mold-block whereby an edge of the moldcavity effects an intermittent advance of the strip. Y r

5. A machinefor casting strips of metal comprising a metal feeding-inlet, a reciprocatory mold-block having a mold-cavity movable across the face of the inlet, means whereby upon each reciprocation of the mold-block the metal in the mold is advanced to clear the cavity and means engaging and holding the strip against retraction.

6. A machine for casting strips of metal comprising a block having a jet-opening, a mold-block having a mold-cavity movable across the face of the jet-opening, means for feeding molten metal to the jet-opening, means for imparting relative reciprocatory movement to the blocks, said mold-cavity bcing shaped to advance the strip upon each reciprocation, and gripping means for holding the strip-during the return movement of the mold-block to clear the cavity.

7. A machine for casting strips of metal comprising a block having a jet-opening, a mold-block having a mold-cavity in crosssection similar to the transverse cross-section of the strip and movable across the face of the jet-opening, means for feeding molten metal'to the jet-opening, means for imparting a relative rcciprocatory movement to the the transverse cross-section blocks whereby LlPOIl each reciprocation the metal in the mold-cavity is advanced to clear the cavity, and gripping means for holding the strip during the return movement of the mold-block.

8. A machine for casting strips of metal comprising ablock having a jet-opening, a reciprocatory mold-block having a moldcavity movable across the face of the jetopening, and means whereby upon each reciprocation of the mold the metal therein .is advanced to clear the mold-cavity and leave the strip in position to be fused by the next cast.

9. A machine for casting strips of metal comprising 'a block having a jet-opening, a reciprocatory mold-block having a moldcavity in one side in cross-section similar to of the strip and movable across the face of the jet-opening means for feeding molten metal to the jet opening, and means .Whereby upon each .reciprocation of the mold the metal therein is advanced to clear the moldccavity and leave the strip in next cast.

10. A machine for casting strips of metal comprising a block having a j et-outlet in one face thereof, a mold-block having a moldcavity extending back from a face of the mold-block movable against the face of the block, means for feeding molten metal to the jet-outlet, and means for imparting a reciprocatory movement to the mold-block so as to move the mold-cavity across the jet-outlet whereby an edge of the mold-cavity acts to advance the strip upon each reciprocation, and means for holding the strip in its advanced position to be fused by the next cast.

11. A machine for casting strips of metal comprising ablock having a metal feedingoutlet, a reciprocatory mold-block having a mold-cavity movable transverse of the outposition'to be fused by the

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