RU2426486C1 - Method to make one-piece moulded items from collagen-containing material - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: invention relates to the field of sewing industry and relates to the method of making one-piece moulded items. The method to make one-piece moulded items by means of application of collagen-containing mixture onto shaping surface, additional moulding and drying consists in using a meshy matrix as a shaping surface, and additional moulding is carried out with the help of a meshy puncheon, at the same meshy surfaces of the matrix and the puncheon carry relief-graphical information. After application of collagen-containing mixture, the matrix and the puncheon are fixed, and additionally the process of the stock surface pattern fixation is carried out by means of submersion into a setting bath, after drying the semi-finished product is subjected to finishing operations.

EFFECT: method makes it possible to make a one-piece moulded item, providing for specified shapes of its outer and inner surfaces and geometric parameters, to preserve relief-graphical pattern on outer and inner surfaces of the item, to automate process of making a one-piece moulded item due to application of meshy shapes, which make it possible to do moulding, impression, fixation and drying of the item without withdrawal of the semi-finished product from a mould, to vary legibility of the pattern by control of process parameters: increased depth of impression and increased concentration of a precipitating agent in a setting bath.

Description

The invention relates to the field of clothing industry and relates to a method for the manufacture of whole-molded products.

A device for vibration forming and shaping hats is known. The device contains a perforated form-block with a support for its attachment and a retaining ring for securing the edge of the headgear. The device is equipped with a removable template and a folding arch for its fastening, pivotally connected to the support. In this case, the form block is thin-walled, consists of two parts: the lower one is stationary and the upper one is removable, and has concave sections, the template is made with the corresponding concave section of the form block, and the retaining ring is installed inside the lower stationary part of the form block (Patent No. RU 2096011, CL A42C 1/02, publ. 02/12/1998). The perforated mold block used for vibration molding can serve to supply air, but cannot provide a complex pattern on the surface, closed areas between the holes make convective drying of the inner surface of the product difficult. The method involves the molding of finished materials fixed along the perimeter, therefore, is not suitable for materials that do not have a connected structure.

A known method of manufacturing a one-piece clothing. To do this, before applying the polymer fluid on the form, a substrate is fixed with release properties to the polymer, and the polymer is applied by dipping into the solution. Then, the mold with the polymer film dried on it is dipped into the adhesive composition, after which reinforcing material is fixed on its surface and dried. Thus, a mold is obtained from the form in the form of a thin shell, which is a one-piece garment. In this case, the substrate can be embossed in the form of a pattern, for example, under the skin, which is transferred to the film coating of clothing (Author of the USSR certificate No. 417135, CL. A41d 3/00). The known method does not provide a drawing on both sides of the product. The hardening material deposited on the surface does not provide a skin-like pattern in the form of embossing.

A device for molding hats, containing a punch and a matrix. To simplify the design and increase the productivity of the device, the matrix is made in the form of a headdress from a one-piece elastic material and mounted on a trolley that moves along guides (Author USSR certificate No. 255585, Cl. 41AC 1/04). The presence of continuous surfaces of the matrix and the punch does not allow for the removal of moisture and the flow of dry air to the wet billet of the product after molding from the flooded mixture, and removing the wet product from the mold or lifting the punch does not allow you to save the drawing on the outer surface of the product during the drying process.

A known method of embossing using a device containing a cold base plate, a pressure heating plate and cliché. The pressure heating plate is arranged to move toward the cold base plate. The cliche is made with relief information on the front side, facing the side of the heating plate. The cliche is made in the form of a separate part placed freely on a cold base plate and made smaller than the size to be decorated with sheet material. The invention improves the efficiency of embossing large sheets, because does not require the manufacture of cliches according to the size of the decorated sheet (Patent RU No. 2298482, CL. B44C 1/24, publ. 04.06.2007). The known method of embossing does not provide a drawing on the surface of the bulk product, can only be used for thermoplastic materials, does not provide moisture removal from the molded wet semi-finished product.

A known method of obtaining paper. The method relates to the production of paper and paper pulp and can be used in the pulp and paper industry. The method includes preparing paper pulp containing fillers and fibers. This paper pulp is treated with polymers. Then carry out the dewatering of the pulp on the grid to obtain a fibrous web, pressing and drying the fibrous web. The disadvantage of this method is the lack of a pronounced pattern on the surface of the finished paper, the ability to specify the texture of only one surface of the product (Patent RU No. 2388863, CL. D21H 17/00, H 17/29, H 17/26, H 23/02, publ. 10.05 .2010).

The closest analogue of the claimed invention is a method of manufacturing molded products by applying a fibrous material to a molding surface, in which a collagen-containing composition that includes a collagen mass is used as a fibrous material (TU 63-25-6-91 from 11/18/91, Belkozin plant) in terms of dry matter - 3-8%, plasticizer - glycerin (GOST 6823-23) - 2.4-12%, oak extract (TU 13-133.1-60-76) - 0.1-0.33%, water - the rest. A collagen composition is applied to the forming surface, molded and dried to a moisture content of not more than 60%. The elastic-plastic properties of the obtained material at a moisture content of 60% ensure the preservation of a given shape. If necessary, changes in the shape of the product carry out a molding process, which includes moistening the semi-finished product to a moisture content of at least 80% and subsequent pressing on a new mold-setting surface using a vibrating press (Patent RU No. 2151534, Cl. A42C 1/00, C14C 13/00, publ. 21.07 .2000). The known method does not allow to provide a pattern in the form of embossing on the surface of the product, and the resulting material does not provide the strength required for the material of the top.

An object of the invention is to provide a given shape of the product and the desired pattern of the outer and inner surfaces thereof, as well as their fixation during technological operations of molding and embossing the pattern.

The problem is solved due to the fact that the collagen-containing mixture is applied to the forming surface, which is used as a mesh matrix, and molding is carried out using a mesh punch, while the mesh surfaces of the matrix and punch carry relief and graphic information, after applying the collagen mixture, the matrix and punch fasten and additionally carry out the process of fixing the pattern of the surface of the workpiece by immersion in a precipitation bath, after drying the semi-finished product is subjected to finishing op talkies.

The method is as follows. A mixture is prepared from tanned and non-sawn fibers in a ratio of 3: 2 in terms of dry matter of 6%, glycerol - 9-18%, oak extract - 0.78%, water - the rest. A mixture is applied to the surface of the matrix using a doctor blade. Then the product is molded with a punch. At the same time, due to the mesh structure of the matrix and the punch and the compressive force of the punch, a pattern is created on the surface of the workpiece, which is fixed in a precipitation bath, for example, in saline or organic solvents. Then carry out drying in air at a temperature of 20-25 ° C. After this, the resulting semi-finished product is taken out of the mold. The process is completed with finishing operations.

For molding the headgear, a device is used that contains a matrix and a punch having a mesh structure, which provides the ability to obtain various embossments on the external and internal surfaces of the part, including with a combination of several types of pattern.

Table 1 presents the results of the studied samples made from a mixture of tanned and unkilled fibers, with a density of application of the mixture of 0.4 g / cm ² .

Table 1 The influence of process parameters on the thickness of the finished material Embossing depth of wet cake mix, mm The thickness of the dried finished material at different concentrations of soda solution, mm one% 8% fifteen% 0.3 1.3 1.36 1.46 0.6 1.4 1,54 1.75

It was found that the thickness of the samples is not completely determined by the embossing depth, since a difference in the depth of embossing with a mesh (h) of 0.3 mm leads to a difference in the thickness of the finished material (H) of 0.1 mm at a soda concentration of 1%; but reaches 0.18 and 0.29 mm at a concentration of 8 and 15%. When treated with a soda solution, an increase in concentration provides better preservation of the shape of the convex elements during drying, as evidenced by an increase in the thickness of the finished material.

The proposed method allows you to:

- to produce a whole-molded product, providing the given forms of its external and internal surfaces and geometric parameters;

- save the relief-graphic pattern on the external and internal surfaces of the product;

- automate the manufacturing process of a whole-molded product through the use of mesh forms, which allow forming, embossing, fixing and drying of the product without removing the semi-finished product from the mold;

- change the clarity of the picture by adjusting the parameters of the technological process, namely, by increasing the depth of embossing and increasing the concentration of precipitant in the precipitation bath.

Claims (1)

A method of manufacturing whole-molded products by applying a collagen-containing mixture to a molding surface, shaping and drying, characterized in that a mesh matrix is used as the molding surface, and molding is performed using a mesh punch, while the mesh surfaces of the matrix and punch carry relief graphic information, after applying a collagen-containing mixture, the matrix and the punch are fastened and, in addition, the process of fixing the surface pattern of the workpiece is carried out by servation in precipitation bath, dried semifinished product is subjected to finishing operations.