DE1078317B - Device for the production of thermoplastic comb rollers for stapling devices - Google Patents

Description

GERMAN

The invention relates to a device, by means of the comb rollers made of thermoplastic material, as they are often used for stapling and binding purposes, with any shape, for example with a circular or oval shape or with one-sided flattening or with a special design the overlapped or beaded edges, with a double bottom, etc. in a simple manner in a continuous manner Operation can be produced.

Devices for the production of comb rollers are already known, with which a free overlap the comb ends is not achievable. With the device according to the invention, the production any overlap of the two comb ends possible, which means that special brackets, ζ. Β. eyelet, omitted in the comb roller ends.

So far you have comb rollers with a certain possibility of overlap regularly by rolling in Manufactured metallic forms, but is largely limited in terms of the shape of the roles. In addition, with these devices, automation is required for mass production production is not possible because the roller burnishing process takes too much time. There are already Devices for the production of thermoplastic comb rollers are known in which punched-out comb webs stored in a flat shape in a magazine and heated before deformation. These devices contain a central mandrel and deforming jaws. To achieve an overlap the fed part to be deformed must be lifted laterally during feeding. Apart from the complicated structure of this device is also not an efficient manufacture and in particular with it unable to achieve high precision.

With the device according to the invention, a fully automatic and efficient production of thermoplastics is possible Comb rolls possible.

A device for the production of thermoplastic comb rollers for stapling devices, in which punched Ridge ridges in a flat shape stored in a magazine and heated before deformation , consists according to the invention of a movable along a flat path mold with half the circumference of the roller corresponding cavity, a mandrel that can be moved up and down perpendicular to the roller axis, two laterally acting slides and a second that can also be applied perpendicular to the roller axis Mold half, the individual parts of the device being assigned a common control is that they take effect in a prescribed sequence.

The inventive arrangement of the slide causes the two ends to be overlapped Device for manufacturing

thermoplastic comb rollers

for stapling devices

Applicant:
Böhm and Co., Stuttgart-W, Reuchlinstr. 19th

Albert Jauss, Stuttgart-Bad Cannstatt,
has been named as the inventor

Comb webs are brought into the correct position before the deformation process begins. As a result, im In contrast to the known devices, any overlap of the comb ends is possible.

A rotating drum is useful as a storage container for the flat punched combs. from which this via a suitable conveyor track to the lower mold half and then with this on the Heating device can be brought past the processing tools. If necessary, the Combs to speed up the work process already in the storage drum on a temperature door be preheated from 30 to 40 ° C, for example, at which the material is still sufficiently rigid is.

An embodiment of a device according to the invention is shown in the drawing in a purely schematic manner Shape shown.

Fig. 1 shows the overall arrangement in the idle state, Fig. 2 shows a partial view during processing.
The device consists of the rotatable, drum-shaped collecting container 1, from which the previously punched, flat combs continuously emerge onto the conveyor track 2, from which they are brought onto one of the mold halves 4 movable to and fro along the machine table 3. They are then guided along with this on a heating device 5, for which, for example, conventional electrical spiral or plate resistors or a device for ultrared radiation can be used. The mold then moves into the working position shown in solid lines, in which it is held in place on the work table 3, for example by a stop. Here it is pressed into the cavity 7 of the mold 4 by the downwardly lowering, round mandrel 6 in such a way that the middle part of the ridge width is bent into the desired roll shape, with

909 767/385

1 U / O D 1 /

the flat edge parts on both sides remain standing upwards. This is the first part of the molding process quit.

Then step one after the other from one side and the other, for example pivotable on the machine frame mounted slide 8 and 9 through recesses in the base plate and the mold 4 upwards and push the flat parts of the comb inwardly so as to initiate the desired overlap and if necessary, the comb wheels can also be provided with flanges, notches and the like. This process is shown schematically in FIG. 2, in which the comb roller is labeled IO. Before reaching the dome 6, the two slides go back, whereupon the second half-mold part is now moves down and gives the roll its final, closed shape. Then return this Mold half and the mandrel with the role back in their starting position, whereupon the role in a simple manner can be stripped laterally from the mandrel.

All movements are controlled by the cam 12. For the transfer of the Any known means can be used to control movement on the individual tools; the easier one For the sake of illustration, these are not shown in the drawing.

As mentioned, by replacing the Tools comb rollers with different diameters and different shapes are made.

The temperature of the combs is regulated in a known manner by thermostats and resistors.

Claims (6)

PATENT CLAIMS: 1. Apparatus for the production of thermoplastic comb rollers for stapling devices, in which punched ridges in a flat shape in a magazine and stored before deformation are heated, characterized in that they are movable along a flat path (3) Form (4) with a cavity (7) corresponding to half the circumference of the roller, one that can be moved up and down perpendicular to the roller axis Mandrel (6), two laterally acting slides (8, 9) and one also perpendicular to the roller axis Applicable second mold half (11) consists, the individual parts of the device a common controller is assigned to be in prescribed order be effective. 2. Apparatus according to claim 1, characterized in that the initiation of the overlap serving slides (8, 9) are pivotally attached to the machine bed below the mold and passed through recesses in the support table (3) and the lower mold halves (4) are. 3. Device according to claims 1 and 2, characterized in that the upper mold half (11) is also mounted pivotably or vertically displaceably on the machine frame. 4. Apparatus according to claim 3, characterized in that the individual molded parts or Tools are interchangeable. 5. Device according to claims 1 to 4, characterized in that as a storage container a rotating drum (1) is used, from which the combs in the rhythm of the molding device in are continuously fed to the lower mold halves (4) via a conveyor track (2). 6. Device according to claims 1 to 5, characterized in that as a common Control member for all parts an eccentric or cam (12) is provided. Considered publications:
German Patent Nos. 443 017, 674 482;
French patent NY. 978 614;
U.S. Patents Nos. 2,491,527, 2,491,528,
502 493. 1 sheet of drawings