JPS6321005A - Production of shoes - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing shoes in which a shoe cover including a shoe cover and an insole is combined with an outsole and molded.

[Conventional technology]

Generally, for athletic shoes, etc., the shoe cover is formed by cutting and sewing material, and the resulting shoe cover and the sole made of a rubber compound, synthetic resin compound, etc. are attached or integrally molded. However, when manufacturing colored shoes, first,
The material sheet is dyed with a dye of the desired color, then this sheet is cut into the desired shape, and the material is coated with sand remover.
The knob, moon-shaped core, etc. are sewn on, and the obtained shoe cover is attached to the last last of the shoe molding device according to the usual method, and then,
The sole was attached or formed integrally with the shoe cover.

[Problem that the invention seeks to solve]

By the way, cloth shoes, chemical shoes, and the like are colored in various colors according to one's preference, and since the cycle of preference changes is rapid, it is necessary to quickly respond to the demand. However, in the past, material sheets were pre-colored through a dyeing process and then cut and processed into cover materials.
Sheets must be prepared that have been dyed for each color.

However, in normal cases, we do not prepare sheets of at least a dozen different colors to meet the demand for any color, but only produce a limited number of trendy colors on the line. That is the reality. therefore,
When the fashion colors change and the demand for colored shoes on the production line disappears.

Even if the product is unavoidable, all materials from colored sheets to semi-finished products are wasted.

On the other hand, when using a cover material made by cutting a dyed material sheet, even if the material shrinks or deforms due to the dyeing process, it remains stable at the time of cutting. There is no need to take special consideration, but in any case, when molding into shoes, the sheet-like material is forcibly deformed to form the shoe last, and then fixed to the sole, so irregular tensile forces are generated. After the shoes are removed from the mold, wrinkles and shrinkage occur in some areas, which causes the shoes to warp and turn.

In order to eliminate this drawback, after cutting the material sheet into a fixed shape of cover material, two or more members are sewn into a sheet shape,
Alternatively, a method has been proposed in which shoes are manufactured by performing a dyeing process during the shoe manufacturing process after three-dimensional sewing, and using a shoe covering material colored in a desired color as a shoe covering.

This method solves the above-mentioned problems and is particularly advantageous in facilitating material management.

However, when dyeing a sheet of material that has been cut from a material sheet or a material that has been sewn three-dimensionally, the agitation force associated with the dyeing process acts on the material, causing the material to deteriorate. Depending on the material, fraying may occur at the cut edges. In particular, when the woven material is cut from the woven fabric 11 with a curved edge as shown in FIG. 2(a), the warp a is separated from the weft thread as shown in FIG. 2(b), and the shape of the woven material is changed. There is a problem in that this causes poor stitching and poor shoemaking, making it impossible to take advantage of the characteristics of piece-dying.

An object of the present invention is to solve the above-mentioned problems and also to provide a method for manufacturing high-quality shoes.

[Means for solving problems]

The present invention relates to a shoe manufacturing method in which a sole is assembled to a shoe cover that has been cut and sewn into a certain shape.After the shoe cover is cut into a certain shape from a material sheet, the cut edges of the shoe cover are treated to prevent fraying. This shoe manufacturing method is characterized in that a dyeing process is performed during the shoe manufacturing process, and the dyed shoe covering material is used as the shoe covering and combined with the outsole.

〔Example〕

The present invention will be explained in detail below.

First, knitted fabrics, woven fabrics, non-woven fabrics, artificial leather, synthetic leather, PV
C. Use a sheet of material such as leather as the base material for the shoelace, and use the sheet of material as the shoe opening in the usual manner.

The material is cut into a material with a developed shape of the material that resembles the shape of the insole.

When the material sheet is woven fabric, the finishing treatments are usually scouring, bleaching, dyeing, tenting, and shrink-proofing.
In the present invention, a woven fabric before being dyed is used. This is exactly the same when using other materials. Cut artificial leather.

When it is difficult to dye synthetic leather, a dyeable resin film (for example, urethane resin) is applied to the leather surface in advance.

Dyeing treatment is applied to sheet-like shoe coverings made by sewing two or more parts, or after sewing the shoe covering materials three-dimensionally and before combining them with the insole, or at the stage of semi-finished products after being sewn into shoe coverings. I do. The processing after dyeing the material is exactly the same as before. In other words, if the material is dyed before processing, it is sewn together, or the insole and other parts are combined and sewn into the shoe cover, and then the sole is attached or integrally molded to the shoe cover to make the shoe. complete. This processing order is the same when dyeing is performed at any stage leading to semi-finished products.

At this time, other members may also be dyed in the same bath.

Normally, most shoe materials are dyed by the dip dyeing method, but with the dip dyeing method, the material shrinks due to the effects of water and heat due to immersion in a dye bath and washing in warm water. If necessary, in the subsequent process, 2-width extraction and tidying processing are performed.Therefore, the 1-width extraction and tidying-processed material is soaked in water again.
Shrinkage occurs when exposed to heat, etc. Although the degree of shrinkage varies depending on the type, component, and composition of the material, it is possible to predict the shrinkage deformation of the material under certain processing conditions.

For example, after being immersed in hot water at 70°C to 100°C for 50 minutes, when dried, natural fibers (cotton) are 4-10%, man-made fibers (rayon) are 15-1.5%, and artificial leather is 2-5%. %
Shrink more than that.

Therefore, in the present invention, when shrinkage occurs due to the dyeing process, it is necessary to set the dimensions of the cover material in anticipation of the degree of shrinkage in advance.

When the cover material that has been cut into irregular shapes shrinks.

Directionality occurs in the contraction. This directionality of shrinkage can be effectively utilized for forming shoe shapes. After processing, the shrinkage of the stitched parts and the bonded parts is limited, and the whole material swells and is shaped three-dimensionally. In this respect, it can be said that it is advantageous in terms of shoe shape design to carry out the dyeing process at the stage of processing into a semi-finished product, or at a stage close to this stage. Furthermore, in order to actively utilize shrinkage deformation, the degree and direction of shrinkage can be actively controlled by using fabrics that combine threads with different shrinkage rates, by sewing different types of fabrics together, by using laminated sheets, or by selectively using laminating glue. It is also possible to control the

When the shoe cover is hung on the last, it is forced to follow the shape of the last, but since it has been shaped in advance to a shape close to the shoe shape, it is not difficult, and after shoe making and demolding, the shoe sole is made to follow the shape of the last. No warpage or deformation occurs. Of course, in the present invention, it is also possible to use a material sheet that has been subjected to shrinkage stabilization treatment before cutting.

In the present invention, prior to dyeing, the cut edges of the fraying material are treated to prevent fraying. As shown in Fig. 1, this fraying prevention treatment is carried out by applying a sewing thread to the cut edge 2 (in the example, the edge of the bottom opening that joins the main bottom) of the three-dimensionally made Jii fabric 1. Use lock stitching to prevent fraying 3 at the width. Of course, the fraying prevention 3 is not limited to lock stitching, but may also be zigzag stitching or overlock stitching.

In addition, it is not limited to the case where sewing thread is used; resin processing by coating latex or urethane resin may also be applied, and the dyeing treatment of the sewing material is not limited to the case where it is performed after three-dimensional sewing.
Dyeing may be applied to parts cut from a material sheet or to a sheet-like product made from two or more parts sewn together.In such cases, anti-fraying is applied along the cut edges of the sheet-like product. Of course. In any case, the edges of the cut material are protected from fraying, so even when subjected to agitation force in the dye bath, the edges do not unravel, allowing the dye to maintain its desired shape. will be held. After dyeing,
When sewing the inner sole or when integrally molding the main sole, there is no need to remove the anti-tangling. In the case of the embodiment, the lower edge of the shoe cover is embedded in the resin of the outsole, but by embedding this fray-preventing part in the resin as well.

It is possible to increase adhesive strength.

Furthermore, even if the fraying material is dyed and frayed at the stage of being made into parts, no problem will arise if the material is sewn as is. This is because the cut edge of the lace material is not directly exposed on the shoe surface because it is usually processed by folding or sewing on the bias.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to prevent the fabric of the dyeing material from fraying due to the dyeing process and dye it without losing its shape, and therefore, it is possible to effectively take advantage of the features of piece dyeing and to easily manage the product. It is possible to obtain the reinforcing effect of shoes by both breaking in and edge treatment.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a fraying-prevention material, and Fig. 2 shows fraying of the fraying material due to dyeing. (a) shows the original state, and (b) shows the state of fraying. FIG.

Claims (1)

[Claims] (1) In a shoe manufacturing method in which an outsole is assembled to a shoe cover that has been cut and sewn into a certain shape, after the shoe cover is cut into a certain shape from a material sheet, the cut edges of the shoe cover are coated to prevent fraying. A method for manufacturing shoes, characterized in that dyeing is performed during the shoe manufacturing process, and the dyed shoe covering material is used as a shoe covering and combined with an outsole.