DD221350A1 - METHOD FOR PRODUCING SEALED ZIPPERS - Google Patents

Abstract

The invention relates to a method of making sealed zippers using four zippered halves. The object of the invention is to produce by a simple and economical way of production, whereby the task is to vulcanize between four zipper chain halves rubber profile. This is achieved by bringing the individual zipper chains into correspondingly positioned mold rails which bring the sewing band into the outermost rear position of the closing element reversal points.

Description

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Title of the invention

Method of making sealed zippers

Field of application of the invention

The invention relates to a method for producing sealed zippers, wherein rubber profile is vulcanized using four slide chains.

Characteristic of the known technical solutions

It is known to produce waterproof zippers, wherein the closure link chains are reversed coupled and embedded in rubber-elastic masses. Thereafter, the zipper link chains are uncoupled and brought into the same position in the closed position. This method has the disadvantage that an additional operation, i. the same side coupling is required. Furthermore, it is not guaranteed that the slide fastener members are coupled during the application of the rubber-elastic masses in their functional state, which can cause problems during later use, due to slope tolerance in the spiral.

It is also known to make sealed zippers so that a sealing tape is rolled on the slide fastener chain and then connected in a press with the zipper members of the slide fastener chain.

A disadvantage here is that the zipper thus produced no longer ensures the function of sealing under mechanical and in particular different pressure loading, that is to say that the sealing elements and also the zipper elements are forced apart, in particular when subjected to a vertical load.

Information sources: DE AS 1276 389, class A 44 b, 19/42

DE AS 1610 376, class A 44 b, 19/00 DE AS 1930 446, class B 29 d, 5/00

Object of the invention

The object of the invention is to find a method for producing sealed zippers which guarantees a simple, economical and functional way of production.

Essence of the invention

The invention has for its object to vulcanize rubber profiles using four individual slide fastener chains and using a suitably built Vulkanisierform between these slide fastener chains.

According to the invention this is achieved in that the closure member rows of four zipper halves during vulcanization axially fixed by the comb-like segments, the zipper correspondingly shaped mold rail, rotated from its position of use and brought the Nähverband by closing the Vulkanisierform in the extreme rear position of the reversal points of the closing members and the sealing strips are formed by the multi-functional, comb-like molding rail and the zipper chain halves to be paired.

embodiment

The invention will be explained in more detail using an exemplary embodiment. In the accompanying drawings show:

1 shows a section through a Vulkanisierform corresponding to the process before the vulcanization

FIG. 2 shows a section through a vulcanizing mold according to the method after the vulcanizing process. FIG. 3 shows a section through FIG. 1

The zipper chain halves 1 to 4 are made in accordance with conventional methods of textile tape 13, closing members 14 and sewing 15

 The zipper chain halves 1 to 4 are inserted into the mold rail 5 and fixed there by the comb-like segments 6 in the axial direction. The segments 6 are offset against each other of the zipper correspondence accordingly. See Fig. 3. The mold rail 5 is connected to the inserted slide chain halves 1 to 4 and the supplied raw rubber film 16 between the slide fastener chain halves 1 and 2 and 3 and 4 with the pressure bars 9 and 10 and inserted into the mold base 12. By inserting the slide fastener chain halves 1 to 4 in the mold rail 5 and the bringing together of the mold rail 5 with the pressure bars 9 and 10, the closure members 14 are rotated from their position of use. By closing the Vulkanisierform by inserting the mold bar 5 with the pressure bars 9 and 10 in the lower mold part 12 and placing the upper mold part 11, the closing members 14 are moved so that the sewing line 15 are brought into the outermost rear position of the closing members 14. By closing the mold a composite Vulkanisierform is simultaneously formed, which corresponds to the shape of the sealing strips 7 and 8 to be formed. Due to the further applied pressing pressure and heating of the mold, the raw rubber film 16 is softened and pressed into the Vulkanisierform described above. After cooling and opening the mold two sealed zipper chain halves can be removed in each case and combined by closing with the slide fastener slider to the finished sealed zipper.

Claims (2)

invention claim 1. A method for producing a sealed zipper, which is formed of four zipper chain halves, wherein the closing members in particular of helical or meandering profile strands exist, between which sealing strips are embedded and which press against each other in the closed state, characterized in that the closing members (14 ) of the four slide fastener chain halves (1 to 4) axially fixed by the comb-like segments (6), the zipper correspondence corresponding positioning mold rail (5), rotated from its position of use and the Nähyerband (15) by closing the Vulkanisierform in the extreme rear Location of the reversal points of the closing members (14) are brought. 2. The method according to item 1, characterized in that the sealing strips (7 and 8) by the multi-functional, comb-like mold rail (5) and the pair to be connected slide fastener chain halves (1 to 4) are formed. ferzy..3 ropes drawings