DE501611C - Compression and stamping press with an elastic abutment made of rubber or the like - Google Patents

Description

GERMAN EMPIRE

ISSUED ON JULY 3, 1930

REICH PATENT OFFICE

PATENT LETTERING

CLASS 15 d GROUP

Josef Grünberg in Berlin

It is known from printing and embossing presses, the material to be processed, the workpiece, e.g. B. paper, cardboard, metal foil etc., with the help of a flexible abutment, for example made of rubber, against to press the die, set, printing block, etc.

If you tried to anaitdine the flexible abutment in such a way that its whole

ίο Area made usable for the work process the disadvantage was that the abutment moved to the side when Work process and a (resulting distortion of the workpiece. Any fixed stops provided to prevent evasion of the flexible abutment meant that the workpiece could not be larger than that enclosed by the stops Space. The die, the originals to ck

ao or the like could of course in the outer dimensions also not be larger than this space, because the original between the attacks had to step inside. In this size limit there is of course a considerable one

as disadvantage.

This drawback is intended to be remedied by the invention. Essentially, the invention consists in the fact that the elastic abutment is enclosed by a movable guide frame which, during the work process, is on the press table or the like. or the workpiece touches down and moves according to the yield of the elastic abutment. Such a guide rail on the one hand prevents the flexible abutment from being squeezed out to the side and on the other hand enables a workpiece of any size to be used.

An elastic one is expediently between the guide frame and the press head Pressure member 'inserted, under the effect of which the frame against the printing or embossing table or the workpiece to be processed lying on it is pressed. Through this the lateral escape of the abutment and any shifting Prevents distortion of the workpiece. The effect can be increased that the buffer force acting on the guide frame is greater than the resistance elastic abutment when it is compressed. The abutment can thus be in in no case push the guide frame out of its effective steering position, because it already does rests on the work table with a certain pressure, even before the abutment noticeably compressed. The arrangement is made so that the pressure surface of the guide frame in a Level or almost on a level with the working surface of the elastic abutment lies.

In order to avoid any escape between the abutment and the workpiece To allow air, the pressure surface of the guide frame with small, after

Outside leading channels o. The like. Be provided in which the mass of the elastic abutment cannot penetrate. The printing area could also serve the same purpose of the Timing Framework is very small Amount "stand back from the working surface of the elastic abutment, so that when Placing the guide frame on the air is already displaced under the abutment surface. ίο In the drawing, the subject of the invention in Fig. ι and 2 in two embodiments Shown in 'vertical section.

According to Fig. 1, the abutment 5 ¹ , which consists for example of rubber, is fastened in a dovetail-like manner to the underside of the crosshead 9, which can be moved up and down in the press frame 8 in the manner customary in presses, being guided ^{by slideways 9 1} . Immediately next to the square abutment ^{plate 5 1, a} groove or recess 19 surrounding ^{the abutment plate 5 1} is provided in the underside of the crosshead 9. A square frame 11 ^{1 is} inserted into this from below, which is suspended, for example, by light leaf threads 20 on the underside of the crosshead 9 and is guided in this groove 19. The frame 11 ¹ encloses the abutment 5 ^{1 on} all sides; its lower surface lies in one plane with the lower surface of the abutment.

If the crosshead 9 is lowered in the described arrangement, the frame 11 ¹ rests on the pedestal table i ^{1 as soon as the lower surface of the abutment S 1} touches the sentence or the like . The prerequisite for this is that 'the surface of the block lies in the plane of the table. If the press is to be used mainly for the production of matrices, ^{a recess 21 is provided in the table i 1} , into which the set is inserted from one side. By inserting base plates, it is easy to ensure that the sentence, cliché or the like lies with its surface in the plane of the table. In other cases the indentation may be missing. It is then only necessary to provide the set or the like with such a wide frame that the guide frame ί i ¹ is supported.

In the now following Arbatosrorgang the abutment 5 ¹ can indeed press together, but not move laterally and swell out, because it is bound ^{to this by the guide frame 11 1.} The guide frame also moves in accordance with the yielding of the abutment 5 ^{1 that takes place during the work process.} 11 ¹ in the guide groove 19 upwards, so that both always remain in the same plane and thus the workpiece is not dependent on the size of the abutment.

In order to avoid an exact alignment of the guide ^{frame 11 1} with respect to the table level or the closing frame, sealing strips atis lead or rubber can be attached ^{in the lower surface of the frame 11 1.}

In the four sides of the guide groove 19 rubber buffers 22 in the form of a frame or individual strips are used. These buffers 22 act on the guide ^{frame 11 1.} By appropriate design of the rubber buffer, it can be achieved that the frame 11 ^{1 is} already printed with a certain pressure on the table surface before the abutment 5 ^{1 is} noticeably stressed. In this way, any under-swelling of the abutment material under the guide frame 11 ^{1 is} prevented.

Instead of the rubber buffers 22, suitable buffer springs can of course also be used will.

In order to allow the ^{air located between the working surface of the abutment 5 1} and the workpiece to escape, fine, outwardly leading channels 23 are provided in the lower surface of the frame 11 ^1. For the same purpose, the lower surface of the frame 11 ^{1 could} be slightly higher than the working ^{surface of the abutment 5 1} . The air between the abutment 5 ¹ and the workpiece has already escaped before the frame 11 ¹ comes to rest.

In the exemplary embodiment according to FIG. 2, the elastic abutment is attached to the press head 4 ^{2 for 5 s.} The quadrangular frame 11 ² surrounding the abutment can freely raise and lower itself on the columns 13 of the Pressengesfcalls. The press table, ι ' ² is attached to a liftable and semkable cross member 12, which also leads to the pillars 13. The set s o. The like located on the table i ² is surrounded by a frame r of such a width that when the table is lifted it ^{strikes the guide frame 11 2} , which moves upwards corresponding to the yielding of the abutment 5 ^{3, and} against the effect of the buffer springs 22 ¹ . Otherwise, the mode of operation corresponds completely to the arrangement according to Fig. I.

In order to give the rubber counter bearing 5 ¹ or S ³ a secure hold in the dovetail groove and at the same time to obtain sharp embossing in the shortest possible time, the gun counter bearing is expediently made of two layers vulcanized together. The part of the abutment facing the set or the original stock consists expediently of

Para rubber, while the part used for fastening in the press head is the abutment is selected from as dense, weakly elastic rubber as possible. In these can a

S a layer of canvas vulcanized into it. In the one for fastening the elastic abutment The part of the abutment serving on the press head could also be a metal frame or a laughed one for the same purpose

ίο metal plate 24 be vulcanized.

The nature or the toughness of this

Embossing rubbers will generally depend on the nature of the embossing stick.

In the case of the press according to the invention, it is possible to carry out the embossing in a single operation to be achieved by applying pressure between the stationary and the moving part of the press. Special preparatory work for the embossing process, as they were previously required, are no longer in the press according to the invention necessary.

The device according to the invention can also be used in 'presses in which the elastic abutment is not arranged on the crosshead, but on the table.

Claims (6)

Patent claims: i. Printing and embossing section with an elastic abutment made of rubber or the like, characterized in that the elastic abutment (5 ¹ , S ³ ) is enclosed by a guide frame (11 ¹ , 11 ² ) which is movable in the printing direction and which during the work process on the press table o. 2. Printing and embossing press according to claim i, characterized in that an elastic pressure member (22, 22 ^{1 ) is arranged between the guide frame (n 1} , 11 ² ) and the crosshead (9, 4 ² ) of the press, under its action the guide frame is pressed against the printing or embossing table or the workpiece to be processed. 3. printing and embossing press according to claim ι and 2, characterized in that that the buffer force acting on the guide frame is greater than the resistance of the elastic abutment. 4. Printing and embossing press according to claim i, characterized in that the pressure surface of the guide frame (11 ¹ , 11 ² ) lies in one plane or almost in one plane with the working ^{surface of the elastic abutment (5 1} , 5 ^3). 5. Printing and embossing press according to claim i, characterized in that the printing surface of the guide frame (11 ¹ , 11 ² ) with channels (23) o. The like. To escape between your elastic abutment (5 ¹ , 5 ³ ) and the Workpiece trapped air is provided. 6. Printing and embossing press according to claim i, characterized in that the elastic abutment (5 ¹ , 5 ³ ) is composed of different types of rubber, such that the part connected to the press is made of weakly elastic rubber, on the other hand that acting on the workpiece Part is made of highly elastic rubber. For this purpose j sheet of drawings