DE1247618B - Inlays for solid rubber bodies, especially stripes, letters or company logos - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B29h

German class:. 39 a6 - 21/02

Number: 1247 618

File number: W 34172 X / 39 a6

Filing date: March 25, 1963

Opened on: August 17, 1967

The invention relates to inserts for solid rubber bodies, in particular strips, letters or logo, made from a pre-vulcanized rubber compound of a different color than that of the Solid rubber bodies that partially protrude from the surface of the solid rubber body.

In the case of the known inserts of the type mentioned, their width and length over the entire height, that is, both of their part protruding from the plane of the outer surface of the solid rubber body as well that of their part engaging in the solid rubber body, the same. This is the cause of that when joining the inlays with the solid rubber body by vulcanizing the visible surface imprecise transitions between the full guroma body and the deposits can result.

The joining of such inserts with a solid rubber body takes place in such a way that the preformed, from a vorvulkani inserts for solid rubber bodies, in particular
Stripes, letters or logos

Applicant:

WEGU rubber and plastics plant G. m. B. H., Kassel-Bettenhausen, Osterholzstrasse

Named as inventor:

Walter Dräbing, Heiligenrode near Kassel

places become unclean between the different colored rubber compounds.
The invention is based on the object of

ized rubber mixture of a color other than 20 layers for solid rubber bodies, especially strips,

those of the solid rubber body existing deposits in intended for them-wells of the lower part of the Press and vulcanizing molds are inserted. The width and length of the deposits correspond approximately the width and length of the depressions, and their height is such that they over the finished piece partially engage in the solid rubber body.

It is regularly associated with difficulties, the insoles form the receiving depressions Letters or company logos, made from a pre-vulcanized rubber mixture from another Color than that of the solid rubber bodies, which partially protrude from the surface of the solid rubber bodies, to create that when using the method mentioned no blurred edge contours in the Allow the area of the part of the insoles protruding from the solid rubber body to occur.

The invention consists in that the inlays are pre-vulcanized accordingly, in particular because one of the sides facing the solid rubber body Rubber body its dimensions temperature- running all around, extending outwards changed depending. This can lead to the deposits not being exactly in the intended depressions fit so that the width and length are too small, so that there is a gap to the side and lengthways hand is. The vulcanizable mixture penetrates into this column after the inserts have been inserted applied different colored solid rubber body. Therefore, there are no sharp edge contours in the finished piece available; Rather, the lower 40 of the inlays flow on the contact surface, so that Different colored rubber compounds for the vulcanizable compound of solid rubber Edges into each other. The finished product body does not have any gap into which it gets as a result, an unsightly appearance. It flows and is then visible on the outside of the finished piece there is still the difficulty that the deposits could be facing. The rubber of the solid rubber body their insertion in. The form basically in its 45 extends as a result after the pressing and Dimensions must be kept slightly smaller Vulcanization process exactly along the edge strips, than the dimensions of the depressions of the pressing and vulcanizing mold receiving the inserts, since expand the deposits during the pressing and vulcanization process. So it has to be 50 the required game is available. It is therefore inevitable that the transitional

Have edge strip, the outer surface of which is in the plane of the outer surface of the solid rubber body Cherishes.

With the formation of the deposits according to the invention is achieved that over joining the Deposits with the mixture for the solid rubber body in the vulcanization mold of the applied Blank body during the pressing process, the edge strips

Even if the indentations of the mold are not completely filled by the insert, the recesses remain free of rubber because the mixture for the solid rubber body during the pressing process cannot get into the depressions because of the edge strip running all around.

709 637/275

Claims (1)

In the drawing, an embodiment of the inserts is shown, it shows F i g. 1 from a top view of a dirt trap Rubber for motor vehicles with different colored, profiled Inserts in letter form, Fig. 2 is a partial section through a pressing and vulcanizing mold in the open position with a dash-dotted line indicated insert and Fig. 3 is a partial section through the pressing and vulcanizing mold according to FIG. 2 in a closed Position with inlay in it and solid rubber body resting on it. In the embodiment of FIG. 1 acts it is a plate-shaped mud flap. Rubber for motor vehicles, the solid rubber body 1 of which, for example, is made entirely of white rubber is shaped. It is provided with a reinforcing rib 2 running all around. Across the sides Reinforcing ribs 2 extend angled ribs 3, between which the sequence of letters extends WEGU, which was chosen as an example, is located. The letters consist of a different color, for example black rubber. The deposits are shown in FIG. 1 in the form of letters on the side facing the solid rubber body 1 with an all around running outward extending edge strip 7 provided, the outer surface in the plane of the outer surface of the solid rubber body lies. The height of the deposits and the dimensions of the depressions 5 in the lower part 4 of the Shape are according to the F i g. 2 and 3 chosen such that the deposits 6 with a certain side and Fit longitudinal play in the depressions 5 of the lower part 4. The depth of the depressions 5 in the lower part 4 the shape is chosen so that the edge strips 7 of the inserts 6 on the extending around the recess 5, rest flat surface of the lower part 4 of the mold. After inserting the inserts 6 into the depressions S, a vulcanizable blank body 1 α in plate form, approximately with the dimensions of the solid rubber body 1 according to FIG. 1, is placed from above. This is followed by pressing and vulcanizing, for which purpose the upper part 9 of the mold is pressed down onto the lower part 4. Both parts 4 and 9 are heated in the usual way. During the pressing process, the blank body 1 α in plate form presses the edge strip 7 firmly onto the base surface, so that no material from the blank body 1 α can penetrate between the inserts 6 and the walls of the depressions 5. Is thus obtained in the pressing and vulcanization between the blank body 1 α and the inserts 6 which are fixedly connected at the VuUianisationsvorgang each other, an exact edge, so a sharp line. After the vulcanization process has ended, the two parts 4 and 9 of the mold are separated from one another separated, and the finished piece can be removed from the mold. Claim: Inserts for solid rubber bodies, in particular strips, letters or company logos a pre-vulcanized rubber compound of a different color than that of the solid rubber bodies that partially protrude from the surface of the solid rubber body, characterized in that that the inserts (6) on the side facing the solid rubber body (1) one all around have running, outwardly extending edge strip (7), the outer surface of which in the Plane of the outer surface of the solid rubber body (1) chests. Considered publications:
German Patent No. 632,890;
Swiss Patent No. 250 565;
U.S. Patent Nos. 1989,702, 2,807,564. 1 sheet of drawings 709 637/270 8.67 ι Bundesdruckerei Berlin