DD147751A3 - PROCESS FOR FINAL MOUNTING OF SHOES - Google Patents

Abstract

The method according to the invention represents a method of joining together parts and serves for joining plastic and / or elastic flat structures made of leather as well as leather-like and other materials, in particular of planar structures with plastic components of shoes by means of injection molding machines. It is preferably applicable to the stem and floor mounting of shoes (e.g., sandals). By means of special positioning and fixing devices in the form of special pins in Spritzguszwerkzeugen a tool-free joining is achieved, resulting in significant time and material savings.

Description

w-206491

Process for final assembly of shoes

Field of application of the invention

The method according to the invention constitutes a new method of joining parts and is applicable in various fields. It is used for joining plastic and elastic fabrics made of leather, leather-like and other materials, in particular floor component masses by means of injection molding machines. It is preferably used for shaft and floor mounting of shoes, e.g. Sandals applicable. ,

·: Characteristic of the Known Technical Solutions Heretofore, various assembly methods for assembling various parts on injection molding machines, especially of shaft and bottom parts, e.g. They all have certain drawbacks and are relatively time-consuming and material-intensive, especially in the production of sandals. The invention set forth in DS-OS 2104 074 relates to a method and a device for the production of coated pudding beds, according to which the overprint material is produced with a relatively high production rate.

206491

zugsmaterial and the Fußbettkern inserted into the mold and connected by a Vulkanisiervorgang v / ground. In this process, the Umbuggkanten the Uberziehmaterials are placed inside and held down by laterally movable slide during the vulcanization process. From this process, the use of coating material is required. In DE-AS 1928 862 and DD AP 77912 a method for producing footwear of all kinds is described, in which a tinter use of a bottom plate or a bottom punch, a frame and provided in the sole part with a foot bed shell forming recess Last existing molding device for applying an outsole to the shaft and the cover insole is used in one operation. Also, in this method, the application is only possible with the help of additional tools and -oder auxiliary components at a correspondingly high cost.

Object of the invention

The aim of the invention is to provide a method in particular for the final assembly of shoes, which is characterized by less effort on time and material. The aim of the invention is also to develop a method which allows the production of a wider range of needs-appropriate shoes, in particular sandals and thus represents an enrichment of the prior art.

presentation; of the invention by means of special positioning and fixing devices

directions in the form of special pins in injection molds (also called tools in the following) for shoes, a tool-free joining is achieved. This results in a considerable time and material savings.

To carry out; Shafts or shaft parts are used, which are provided in the joint area with specially arranged holes. For positioning and fixing the shoe parts, the tools are provided with pins in a suitable arrangement. The holes are introduced in the same dimensional assignment in the shafts or in the * shaft parts as the pins of the tool are arranged. As a result, joining during final assembly of shoes, e.g. Sandals are performed without additional shoe components. Closing, injecting and opening the tools is done in the usual way. The method according to the invention can be used both for split stock blades and for undivided ones. In shafts of the former type, advantageous cavities are stored in such a way for a reduction in weight and for a flexibility • increase when using the method that after demolding the cavity openings are mounted on the foot-side surface of the sole. The resulting cavities are covered by bonding with a up to 2.4 mm thick sock, thereby creating a foot-friendly shape, whereby the risk of painful foot pressure is avoided. When using undivided shaft blades, an unlockable metal-fiber casting is advantageously used for demoulding as part of the tool. The invention will be explained in more detail by the following example.

Two shaft assemblies to be joined are positioned by plugging in the open tool on a total of ten existing pins and fixed by tensioning 'in tension springs. In the process, they are immovably stapled in each position of the tool in the positioning area with the application of adhesive as adhesion promoter. The tool equipped with shaft assemblies as described above is now closed.

Then you fill the closed tool with PVC or other suitable as Besohlmaterial plastic material and or Elastwerkstoff. During this phase, the shaping of the sole takes place at the same time; with the shaft assemblies instead.

The finished product remains in the closed mold until the curing process. After completion of the curing, the tool is opened and the product removed.

Claims (3)

Investment: 1. A method for the final assembly of shoes, in particular of sandals by injection molding, wherein shafts or shaft parts positioned and in which optionally provided in it cavities'Sohlen formed /, characterized in that the shank parts are pulled over the bars so and so in Tool are fixed, that are placed in the shaft parts in position punched holes for receiving the fixed in the tool in the 'positioning' pins. 2. The method according to item 1, characterized in that after demolding the cavity openings are covered on the foot-side surface with a sock to be bonded. 3. The method according to item 1, characterized in that when using undivided leaves by means of an unlockable strip division 'demoulded' is.