RU2295270C2 - Method for applying of ornamental pattern onto leather parts - Google Patents

Abstract

FIELD: haberdashery and leather goods, shoe industry, finishing of outer cloths, manufacture of furniture covered with leather, and finishing of car interior.

SUBSTANCE: method involves applying melted thermal glue onto inner side of leather part; pressing press die into leather part by lowering press die onto leather part surface positioned above inner side of part. Application of melted glue onto inner side of leather part results in formation on part inner side of additional layer which strengthens the latter and protects it from hazardous effects. Increase in part thickness allows volume of applied ornamental pattern on outer side of leather part to be increased. Application of melted glue onto inner surface of leather part provides for automatic slight heating of part by heat released from thermal glue. Such method does not deteriorate strength characteristics of leather during application of pattern.

EFFECT: increased pliancy of leather during application of pattern and improved quality of ready article.

1 dwg

Description

The invention relates to light industry, namely, leather goods, footwear, bookbinding industry, to the production of outerwear as a finish, to the manufacture of furniture, leather upholstered, trim car interiors, as well as to crafts. The proposed method of applying a decorative pattern on leather parts allows you to combine the modern production of leather products with folk traditions, thereby folk art and, in particular, folk crafts from the field of decorative and applied art go into the field of production of consumer goods with improved aesthetic and operational properties .

A known method of applying a decorative pattern to leather parts is that the pattern is applied to the face of the skin using a stencil and the resulting line of the pattern is burned using a burning apparatus, the contrasting parts of the pattern are selected by stroke strokes of the burning apparatus needle (See the book by Ananina T.V. Artistic leather goods, M., Peoples' Friendship University of Russia, 1994, pp. 24-26, 74-75, 77-82).

However, the known method of applying a decorative pattern requires a firm hand, you need to work quickly and smoothly. Do not use too hot needles and put strong pressure on the skin, as the skin quickly burns and is easily damaged, which reduces its strength characteristics.

There is also a method of applying a pattern to leather parts, which consists in the fact that the pattern to be applied to the skin is divided into separate fragments, which together will form a single artistic design, while the contours of these fragments are applied to a split and cut out, moreover depending on the proposed height of the relief of the pattern, the necessary details are cut out in two or more copies with a change in scale as necessary, then the fragments thus obtained are glued to the back of the skin, which is the basis for creating the drawing, one next to the other and one on the other so that the formation of the drawing is achieved as a whole with the lifting, if necessary, of its individual parts above the others by increasing the thickness of certain fragments that make up the corresponding section of the drawing. After that, the entire surface area of the matrix is treated with an adhesive composition and the skin is glued onto it, on the surface of which it is assumed to receive a volumetric pattern, face up, after which the facial surface of the skin is treated with hot air and at the same time mechanical effects are applied to it in the form of pressures and punctures.

The disadvantage of this method is its complexity and the high probability of damage to the inner surface of the skin after the implementation of the drawing process, i.e. at the time of separation of the matrix from the skin, which reduces its operational stability.

The closest in technical essence and the achieved effect to the claimed method of applying a decorative pattern on leather parts and selected as a prototype is the method of applying a decorative pattern on leather parts by pressing a matrix into a part in the frame when exposed to heat from the inside (bakhtarmany) the side heated to 55-60 ° C (See AS No. 1292717, class A 43 D 8/22, “Method for applying a decorative pattern on leather parts”, claimed March 29, 84, published February 28, 87 )

The disadvantage of this method is that the inner side of the part after the implementation of the method of applying the decorative pattern remains unprotected from wear and damage from factors such as dampness, moth, the effects of loads in the process of using products made from such parts, and therefore, such parts are low operational durability.

The objective of the invention is to increase the operational durability of leather parts while increasing the volume of the applied decorative pattern on the outer surface of the skin.

The technical result of the claimed invention is the formation of an additional layer on the inner side of the leather parts.

In addition, the technical result of the claimed invention is to obtain a new assortment of competitive products with a quality appearance from the point of view of aesthetic needs and with improved operational properties, while providing a new direction in the artistic processing of the front surface of leather parts.

The problem is achieved in that in the known method of applying a decorative pattern to leather parts by pressing the matrix into the part, according to the invention, hot melt in the molten state is applied to the inside of the part before pressing the matrix, while the press matrix is lowered onto the surface of the leather part located above the inside of the leather part.

Studies on patent and scientific and technical sources of information indicate that the proposed method for applying a decorative pattern on leather parts is unknown and does not follow explicitly from the studied prior art, i.e. meets the criteria of "novelty" and "inventive step".

The proposed method can be implemented at any enterprise specializing in this industry, because this requires well-known materials and standard equipment, widely produced by domestic and foreign industry.

Thus, the claimed method of applying a decorative pattern on leather parts meets the criterion of "industrial applicability".

The application of hot-melt adhesive in the molten state on the inner part of the leather part before pressing the matrix leads to the formation of an additional layer on the inner surface of the part made of leather, which strengthens it, protects it from harmful factors, and therefore increases the operational resistance of leather parts, in addition, it increases its thickness, which in turn allows you to increase the volume of the applied decorative pattern on the outside of the leather part. The application of hot-melt adhesive in the molten state on the inside of the leather part provides automatic heating of the leather part due to the heat that gives off the hot-melt adhesive, which in turn ensures the compliance of the skin during the application of the pattern, and therefore does not violate its strength characteristics, increases the operational stability of the parts leather.

Lowering the press matrix onto the surface of the leather part located above the inner side of the leather part simplifies the maintenance of the device to implement the proposed method, allows you to easily change the matrix, and therefore, change the types of decorative patterns applied to the outside of the leather parts, expand the range products.

Thus, the set of essential features of the proposed method of applying a decorative pattern on leather parts allows to achieve the claimed technical result, namely, obtaining a new range of competitive products with high-quality appearance from the point of view of aesthetic needs and with improved performance properties.

The drawing schematically shows a device for implementing the proposed method.

A device for applying a decorative pattern on leather parts consists of a bed 1, on which a supporting frame 2 with a base plate 3 and a working cylinder 4 is mounted. A matrix 5 is attached to the base plate 3 using a special lock. A movable carriage 6 is located inside the supporting frame 2, on which the frame 7 is fixed to orient the leather part 8 relative to the matrix 5. The molten hot melt adhesive 9 is poured into the frame 7, which simultaneously serves as a container.

The method is as follows.

Hot-melt AlSil-5 hot melt is heated to a temperature of 50-80 ° С until its transition to the molten state, then it is poured into the frame 7. Next, take part 8 from the skin and apply it with the inner side to the surface from the molten hot melt. Then, using a press (not shown), the matrix 5 is activated, which is lowered onto the surface of the leather part located above the inner side of the leather part under pressure, which is regulated depending on the area of the relief of the matrix.

The duration of the embossing is controlled by a time relay. After a given embossing time, the piston with the movable carriage 6 is lowered and the finished part is removed from the frame 7.

The proposed method of applying a decorative pattern on leather parts can be carried out even at home with the help of the simplest devices and efforts of human hands.

As hot-melt adhesive, you can use any hot-melt adhesive that can be easily melted by simply placing it in a container that is heated on a household stove, for example, Hot-melt adhesive SP or Hot-melt adhesive AlSil-5. The matrix can be pressed with your hands to the outside of the leather part.

Leather details processed by the proposed method acquire a wide variety of patterns and attract with their originality. At the same time, the parts become durable and at the same time flexible and pliable with further use in various fields: in the manufacture of furniture, leather goods, in the shoe industry, in the manufacture of parts for the decoration of car interiors.

Claims (1)

A method of applying a decorative pattern to leather parts by pressing a matrix into a part, characterized in that hot melt is applied to the inside of the part before pressing the matrix in the molten state, while the press matrix is lowered onto the surface of the leather part located above the inner side of the leather part.