DE431162C - Process for the production of resilient heads - Google Patents

Description

GERMAN EMPIRE

ISSUED JULY 1, 1926

REICH PATENT OFFICE

PATENT LETTERING

CLASS 7c GROUP 29

(H 100622 I / γ cJ

Georg Hrouda in Dresden. Process for the production of resilient heads. Patented in the German Empire on February 18, 1925.

The resilient part of the previously known snap fastener is so far in the Made in a way that the pear-shaped pin is made of spring-hard brass or sheet iron Cut out as a star flat and then in several steps to the desired Pear or spherical shape is designed. This procedure is very time consuming. and cutting out the star creates a lot of waste.

The present invention relates to improvements in the method of manufacture of resilient male or female parts for snap fasteners or for production the resilient contact pins in plug contacts or the like.

The new method is to be described in the present for the production of the resilient male part for snap fasteners. The new thing is that in a sheet metal strip by means of one or more punching punches of the male head (see Fig. I) pulled and the male head then pulled through in a lower part of the female part a holding stamp is pressed in and held. The stop stamp is here with two or more movable cutting knives provided on the punch in order to remove these cutting knives from the The male head cut out the material to form the slots or recesses. The male head thus provided with slots or recesses is then still through processed another punch and a correspondingly executed die part to to press the sharp cutting edges inwards and the patrix head to sharpen each one To take edge.

In the accompanying drawing, the process is shown schematically in the continuously moving or continued sheet metal strip. In the sheet metal strip β, the male head b is drawn in a known manner by means of one or more punches c. The head & punched in this way is then pressed into the die head d by means of a holding punch e under spring pressure. In this holding punch, four cutting or piercing pins / are guided in corresponding recesses g of the punch in the embodiment and are moved downward in the punch in such a way that slots or recesses are cut out through the piercing pins in the held male head.

In the illustrated embodiment , the holding ram e is placed under spring pressure in a housing h , and the perforated pins / are attached to the housing h . The housing h is moved in the vertical direction by any means, so that on the one hand the holding punch can be inserted into the female part and, as the housing continues to move downward, the perforated pins cut out the slots or recesses in the male head.

As can be seen from Fig. 1, a special punch / is arranged behind the holding punch e (see Figs. 7 and 8), which cooperates with a male part in order to prevent the punch / into the female part when the punch is inserted. to take away the sharp edges of the patrix head and to press the edges of the cut-out slots inwards.

Fig. 2 shows a vertical section of Fig. Ι through the holding stamp with the four Recesses in which the perforated pins / are guided.

Fig. 3 shows a section of the holding stamp along the line CD in Fig. 1 with the perforated pins /.

Fig. 4 shows a top view of Fig. 1.

Fig. 5 shows the holding stamp in the shape of a cross, in which the four segment-like Perforated pins / are guided; while Fig. 6 shows an embodiment of the holding stamp with six shows segment-like pierced pins.

Figs. 7 and 8 show a top view and side view of a holding punch / with receding Edges, which cooperates with a male part to the insertion of the punch in the female part Patrizenkopf to take the sharp edges and the edges of the cut out: Push the slots inwards.

Fig. 9 shows a view of a plug contact, in which the suspension of the plug pins by Cutting out the material as is achieved with the die head.

The method described above can, as carried out in the production example, for the production of the resilient male or female mold heads as well as z. B. for the production of the resilient contact pins Plug contacts (see Fig. 9) or for the production of other such resilient heads showing Parts are used.

Claims (2)

Patent Claims: 1. Process for the production of resilient heads, e.g. B. in snap fasteners, Plug-in contacts or the like, characterized in that a continuous sheet metal strip is made by means of a punch the resilient head drawn in a manner known per se, and the so drawn Head held by a holding punch in a die and by the perforated pins guided on the holding punch the slots or recesses are cut out in the resilient head, 2. The method according to claim 1, characterized in that the with recesses or slotted resilient head is pressed by means of a press ram into the die part to the sharp edges or burrs resulting from the cutting towards the inside to bend. 1 sheet of drawings.