JPH05168501A - Sole working method - Google Patents

Abstract

PURPOSE:To lighten a sole and improve shock absorbing performance. CONSTITUTION:An instep skin 1 is drawn into an intermediate sole 2, and a mold material for cavity at reverse section which is sealed up with non- compressive liquid 5 is sticked to proper positions like the heel part and trampling part on the lower surface of the intermediate sole 2. After the instep skin 1 is molded directly with the sole, the liquid in the cavity at reverse section is extracted by a syringe 8 or the like and replaced by air to mold a cavity 10 in the wall thickness of the sole 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method for forming a void corresponding to a slime in a shoe sole adhering method in a shoe sole of safety shoes or other shoes.

[0002]

2. Description of the Related Art When a safety shoe is directly manufactured by a bottomed manufacturing method, an individual piece molded with a veneer plate in the VP manufacturing method and a compression board molded in the D type manufacturing method are formed on the lower surface of the heel of the insole. After fixing each of them, by molding with a sole, a slime is provided in the heel part meat pressure of the shoe sole.

[0003]

In the above-described conventional direct bottoming manufacturing method, since the individual pieces remain in the meat pressure of the sole after the bottoming molding, the weight of the sole is reduced and the impact absorption performance of the heel is reduced. It cannot help but decline. Therefore, it is possible to replace the above individual piece with, for example, a sponge-like piece, but in that case,
The sponge-like material will be deformed under the pressure applied during molding with a sole, and will return to its original shape after pressure is removed, resulting in deformation of the sole, poor adhesion between the sole and upper, or pressure during molding. It will remain deformed and lose its effect as a sponge. On the other hand, some sports shoes have an air bag built in their heels, but in order to withstand the pressure at the time of molding with a bottom, the elasticity of the air bag must be reduced. It is an object of the present invention to provide a shoe sole processing method that solves the above conventional problems.

[0004]

In order to achieve the above-mentioned object, the present invention is designed so that the upper of a shoe is fished into the insole, and the upper part of the lower surface of the insole is not covered with a suitable part such as a heel part or a tread part. After fixing the mold material for sealing molding which is formed by sealing a compressible liquid and molding the bottom directly on the upper shell, the incompressible substance in the mold material for drawing hardness is extracted with an injection needle or the like and replaced with air. It is characterized by forming a hollow space inside the shoe sole's body pressure, and at the appropriate parts such as the heel and the foot of the bottom of the last mold, the mold for forming the recess is projected, and the shoe is placed on this last mold. After forming the sole with the upper of the upper covered and omitting the insole and fishing it, remove the last mold from the upper and form a slim void in the meat pressure of the shoe sole. It is characterized by.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 1 is the upper of a safety shoe, and 2 is the upper of the upper 1 which is attached to the bottom of the upper 1 during the fishing process of the upper 1. The bottom 3 is a mold material for molding that is fixed to the lower surface of the heel of the insole 2. Using a film such as synthetic resin, a suitable number of, for example, 4 containers 4 are molded so that they are connected at the entrance. Each container 4 is filled with an incompressible substance 5, for example, a fluid (water, glycol, etc.), a powder (an nitrate nitrate, sucrose, etc.), and the inlet of each container 4 is sealed with a lid film 6. Become. After fixing the dip molding material 3 to the lower surface of the heel of the insole 2 with an adhesive or the like, use urethane resin or the like on the entire lower surface including the dip molding 3 of the insole 2 and the lower peripheral edge of the upper 1. After the shoe sole 7 is directly molded with the sole, for example, the injection needle 9 of the syringe 8 is pierced from the top of the insole 2 into each body 4, and the incompressible substance 5 is extracted and replaced with air. A hollow space 10 is formed in the heel wall pressure of 7. In addition, when the shoe sole 7 is preformed separately from the upper 1 and the sole 7 is directly bottomed on the upper 1, as shown in FIG. Using the shoe sole 7 provided with the hole portion 11 for fitting the respective body 4 therein, the respective body 4 of the dip molding material 3 is fitted into the hole portion 11 to position the dip molding material 3 After that, the shoe sole 7 is bottomed on the upper 1. Next, another embodiment of the present invention will be described with reference to FIG. 5. Reference numeral 12 is a last mold, and a bottom portion of the heel portion thereof is provided with a dip mold portion 13 for projecting. The last mold 12 is covered with the upper of a safety shoe, the upper is omitted and the bottom of the shoe is fished in, and the bottom mold is directly molded. Form a slim void in the meat pressure.

In each of the above-described embodiments, an example is shown in which the slack space is provided in the heel portion of the shoe sole, but the present invention is not limited to this, and the stepped portion of the shoe sole or other appropriate portion is sunk. Voids may be provided. The present invention can also be carried out when forming a hollow space in the sole of a shoe other than a safety shoe.

Since the present invention is constructed as described above, it has the following effects. After molding with a sole, a hollow space is formed in the meat pressure of the shoe sole, and solid pieces do not remain, so that the shoe sole can be made lighter and the impact absorbing performance such as the heel portion can be improved. When using a mold for forming a dull mold that is made by sealing an incompressible substance, the mold does not deform due to the pressure when molding with a bottom. Therefore, even if the pressure is released after molding, it will return to its original state. It does not cause the deformation of the sole or the poor adhesion between the sole and the upper.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state immediately before fixing a dip molding material formed by sealing an incompressible substance to an insole.

FIG. 2 is a partially enlarged sectional view of the mold material.

FIG. 3 is a diagram illustrating an example in which the above material is directly subjected to bottom molding and then the substance is extracted.

FIG. 4 is a perspective view of a shoe sole having a hole for fitting the body of the mold member.

FIG. 5 is a partial perspective view of a last mold having a dip molding die portion.

[Explanation of symbols]

1 ... shoe upper, 2 ... insole, 3 ... mold material for dull molding, 5 ...
Incompressible substance, 7 ... Sole, 8 ... Syringe, 10 ... Null void, 12 ... Last mold, 13 ... Null molding die.

Claims (2)

[Claims] 1. A shoe molding upper is sewn into an insole, and a suitable part such as a heel portion or a tread portion on the lower surface of the insole is fixed with a sluice molding material formed by sealing an incompressible substance. A shoe sole characterized in that after the sole is directly formed on the upper, the incompressible substance in the slime forming mold material is extracted and replaced with air to form a slime void in the meat pressure of the sole. Processing method. 2. The last mold is provided with a dip molding part protruding from an appropriate portion such as a heel part or a stepped part on the bottom surface, and the last mold is covered with the upper of the shoe, and the upper is omitted from the insole. A method for processing a sole, characterized in that, in a state in which the shoe is caught, the sole is directly molded and then the last mold is pulled out from the upper to form a hollow space in the meat pressure of the shoe sole.