CS252387B1 - The method of shifting parts from flat flexible materials - Google Patents

Abstract

The problem of creating a ruffle effect on parts made of leather and leather-like materials by creating pleats is solved. The pleats are created by gradually pressing the part into the grooves of a flexible backing, onto which it is centered, then glued and removed from the flexible backing. The pleats are fixed by ironing and the part is cut to the final shape. The solution can be used mainly in shoemaking and haberdashery production.

Description

252387

BACKGROUND OF THE INVENTION The present invention relates to a method of shirring flat flexible parts; materials, especially suitable and synthetic leathers, to create folds, to provide folds, and to heat, especially for shoemaking and haberdashery.

There is a known method for the formation of debris with subsequent tapping or ironing and providing a fold by taping or seaming on the edge. This method is very laborious and, if it is necessary to keep the overhanging position of the fold, this must be marked, for example by means of a template. In addition, a method for forming pleats in a complete flat material is known. The folds are formed by passing through rollers rotating at different speeds, whereby the material is brought to the roller assembly in a changing direction. The formed fold is ignited. By passing the material through the roller assembly, it is not necessary to provide the folds formed by taping them in a flat manner. However, when the shoe or leather haberdashery product is cut off, it is necessary. Labor productivity in this case was higher than manual creation. The disadvantage is the irregular formation of folds. The shape of the folds, the position and the density of the deployments cannot be pre-set. After punching, the parts do not have the same type of wrinkling, which causes the ductility of the shoe to be made by using such parts. It is also used to create creases in leather or leatherette materials of constant width form by means of a stacking and ironing roller system with extraordinary rotational axes. The feed profiled rollers evenly distribute the material by reducing the width of the strip and feeding the material to the smooth-rolling ironing rollers. In this way, a uniform folding of the composite shape is achieved with relatively high productivity. The disadvantage of this is the high waste generated by the fact that the material must first be cut into strips from which parts of the desired shape are punched out after being wrinkled. This greatly deteriorates the complexity of punching parts and the greater the percentage of waste.

The above-mentioned drawbacks are eliminated by the method of the invention, wherein the central part is provided with grooves in the central head, into which the stepped indentations are pushed, then taped and the flexible washers removed.

The technical effect of the invention is that a good reproducibility of the crease formation, its exact shape and the positioning of the component are achieved with the appropriate productivity of the series production pre-conditioner. The appropriate initial shape of the part reduces the percentage of material dropping to a minimum. In order to illustrate the method of folding into leather or leather, respectively. Figure 1 is a schematic drawing of the footwear of the upper of the shoe according to the invention; FIG. 1 shows a sectional view of a portion of the elastic washer; FIG. 2 shows a section through a resilient washer and a die; and FIG. with folds formed in the mold.

The process according to the present method is only as follows. The pre-punched upper 1 is placed face-down on the elastic pad 3. The initial position of the upper part 1 relative to the spring pad 3 is determined by the marks not shown. The pressing device (not shown) is brought into the movements 4, in which the dies 5a to 5e are provided, which gradually push the material of the upper part 1 from its first edge 1a to the other edges 1b into the corresponding grooves 3a to 3e formed in the elastic substrate 3. The dies 5a to 5e are correspondingly similar to the equally oriented grooves 3a to 3e of the spring washer 3. By fully pressing the upper die material 1 into all the grooves 3a to 3e, the movement of the frame 4 starts to gradually drain from the second edge 1b to the first edge 1a, that is to say in the order of insertion thereof. The spring washer 3 retains the upper part 1 thus formed in the grooves 3a to 3e. The lining 2 is adhered to the upper part 1, which ensures that the formed folds z are retained after being removed from the elastic pad 3. The bonded upper part 1 is then ignited in a suitable manner, e.g. of a perfect shape according to the appropriate size. Also proceeds in the case of injection of the material of the upper die 1 into the grooves 3a to 3e of the spring washer 3 from its center to the first and second edges and 1b. The number of folds and basically the shape can be varied as desired. The folds can be of the same or different width, the canopy extending from the edges, or terminated at any point by progressively reducing the width.

The method of the invention can be used in footwear and haberdashery production.

Claims (1)

252387 SUBJECT MATTERS A method of folding flat flexible material parts by forming folds, fixing the folds by taping, ironing, and punching the final shape, wherein the workpiece has a spring-loaded washer provided with grooves into which it is subsequently pushed, then is taped and made of flexible p-pad. 1 sheet of drawings