JPS6147082B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a juute-wrapped shoe sole in which a foamable synthetic resin is injected into a mold in which juute is placed and then foamed and hardened, and a method for manufacturing the same. It is.

(Prior Art) Soles or shoes made of juute have been developed, which are manufactured by injecting sole material into a mold in which juute is placed.

That is, US Pat. No. 3,855,657 discloses that grooves with a large number of suction holes are provided in the inner peripheral walls of the left and right horizontal molds (corresponding to the lower mold 3 of the present invention), and foxing is arranged in the grooves. It has been disclosed that a shoe sole or shoe is manufactured by holding the mold by suction and injecting and solidifying a resin such as rubber into the mold.

However, in this case, since the foxing is held in the mold by suction, the structure of the mold is complicated and expensive, and as a result, the resulting shoe soles, etc. tend to be expensive as well. .

Since the foxing is held in the groove by suction, when foxing made of knitted fabric with excellent breathability is used, a large amount of suction force is required to hold the foxing, and moreover, there are shoes inside the mold. It was difficult to adjust the timing of injecting and solidifying the bottom material and the timing of stopping the suction.

Furthermore, when natural rubber is used as the sole material, there are disadvantages in that the juute may discolor due to heating during vulcanization, and the resulting juute-wrapped sole becomes heavy.

(Problems to be Solved by the Invention) An object of the present invention is to easily manufacture a lightweight juute-wrapped shoe sole whose juute does not easily peel off at a relatively low cost.

(Means for Solving the Problems) The juute wound shoe sole and the manufacturing method thereof according to the present invention have the following configuration.

A foamable synthetic resin is injected into a mold in which the jute a is placed, and is foamed and hardened. This is a juute-wrapped shoe sole in which juute a is integrally fixed to the periphery of b.

Around the upper peripheral mold 10 provided on the upper mold 5, and in the retaining groove 11 provided on the lower contact surface 16 of the upper mold 5,
After fitting one side of jute a in the longitudinal direction,
A juute-wrapped shoe sole characterized in that a foamable synthetic resin is injected into a mold in which the upper mold 5 is superposed on the lower mold 3, and the synthetic resin is foamed and hardened while being covered and pressed with an upper lid 7. This is a manufacturing method.

(Example) The jute-wrapped shoe sole and the manufacturing method thereof according to the present invention include:
Moreover, the holding groove 1 provided on the lower contact surface 16 of the upper die 5
1, insert the juyute a, inject a foamable synthetic resin into the mold, foam and harden it, and make the shoe sole with the upper part 17 of the juyute a protruding from the upper end 18 of the sole body b. jute a on the periphery of body b
It is integrally fixed.

The present invention will be explained using an example using the juute wound sole manufacturing apparatus shown in FIGS. 1 to 4.

In this device, a pressing member 1 for pressing and fixing stacked molds is attached to the right end of a base 2, a lower mold 3 is fixed to the base 2 to the left of this pressing member 1, and the left end of the lower mold 3 is fixed to the base 2 on the left side of the pressing member 1. An upper mold 5 is attached to the upper mold 5 by a screw 4 so as to be openable and closable, and an upper lid 7 is attached to the upper surface of the upper mold 5 by a screw 6 so as to be openable and closable.

The lower mold 3 has a lower mold 8 (a mold for a contact surface of a predetermined shape of the sole) carved in the center of the upper surface, and this lower mold 8
Fitting holes 9 are bored on the left and right sides of the housing.

The upper mold 5 has a small, approximately foot-shaped opening 12 in the vertical center, and a lower contact surface 16 around the opening 12.
A top outer peripheral mold 10 (a mold of the outer peripheral part of the surface on which the upper member such as the upper is attached) is provided, and a retaining groove 11 is carved on the periphery of this upper surface peripheral mold 10 to correspond to the fitting hole 9 of the lower mold 3. Two guide pins 13 are provided protruding from the lower contact surface 16 at the position where the guide pins 13 are located.

The upper lid 7 has a surface of the lid plate 14 that overlaps the upper mold 5,
An upper inner mold 15 (a mold at the center of the surface on which the upper member such as the upper is attached) which fits into the opening 12 of the upper mold 5 is fixed.

Next, the present invention will be explained using the shoe sole manufacturing apparatus.

Fit one side of the jute a in the longitudinal direction into the holding groove 11 of the upper mold 5, and then fold down the upper mold 5.
Fit the guide pin 13 into the fitting hole 9 of the lower mold 3,
The lower contacting surface 16 of the upper die 5 is superimposed on the upper surface of the lower die 3 to form the state shown in FIG.

Two-component urethane is injected through the opening 12 of the upper mold 5, and the upper lid 7 is immediately covered so as to overlap the upper mold 5. with the pressing member 1 on the right end of the base 2,
The stacked lower mold 3, upper mold 5, and upper lid 7 are pressed together to foam and harden the urethane.
Set the state as shown in the figure.

From this state, the pressure of the pressing member 1 is released and the mold is removed, so that the upper part 17 of the jute a protrudes from the upper end part 18 of the sole body b, as shown in FIGS. Thus, a juute-wrapped sole is formed by integrally fixing the juute a to the periphery of the sole body b.

In the above examples, two-component urethane was used as the foamable synthetic resin, but any synthetic resin that has foaming properties and hardens at room temperature or with almost no heating after foaming may be used instead. May be used.

In addition, various patterns of the sole body b can be freely formed on the lower surface mold 8 of the lower mold 3, and the upper lid 7 can be freely formed.
It is free to form an uneven pattern on the upper inner mold 15 in order to further reduce the weight of the sole body b.

(Operations and Effects of the Invention) The juute-wrapped shoe sole according to the present invention has the above-mentioned structure, and the upper side part 17 of the juute a protrudes from the upper surface end 18 of the sole body b. Because jute a is integrally fixed to the periphery,
When the upper member such as the upper is attached to the sole of the shoe, the boundary between the sole and the upper member is the upper part 17 of the jute a.
It can be hidden by the shoe, providing an elegant finish.

The juute-wrapped shoe sole according to the present invention has the above-mentioned configuration and uses a foamable synthetic resin, so the resin soaks into the juute a due to the pressure caused by the foaming of the resin, and forms the sole body b. Can be firmly fixed,
JUUTA is difficult to peel off, and some of the fibers that make up JUUTA are bonded by the resin,
The durability of the jute (a) fixed to the periphery of the sole body (b) is improved.

The juute-wrapped shoe sole according to the present invention has the above-described structure and uses a foamable synthetic resin, so no heating operation is required, and the juute a does not discolor and is elegant.

The method for manufacturing a juute wound shoe sole according to the present invention includes:
With the above-described structure, a foamable synthetic resin is injected into the mold in which one longitudinal side of the jute a is fitted into the holding groove 11 provided on the lower contact surface 16 of the upper mold 5, Because it is foam-cured, it is possible to easily manufacture lightweight juute-wrapped soles that are highly abrasion resistant, elastic, and hard to peel off at a relatively low cost.

The method for manufacturing a juute-wrapped shoe sole according to the present invention includes:
With the above-mentioned configuration, the upper peripheral mold 1 provided on the upper mold 5
A retaining groove 11 is provided around the upper die 5 and on the lower contact surface 18 of the upper mold 5, and a jute a is provided in this retaining groove 11.
The upper mold 5 is superimposed on the lower mold 3, and a foamable synthetic resin is injected into the mold and foamed and hardened. It does not wrap around or protrude from the mold.

The method for manufacturing a juute wound shoe sole according to the present invention includes:
With the above-mentioned configuration, one longitudinal side of the jute a is fitted into the holding groove 11 provided on the lower contact surface 16 of the upper mold 5, so that the upper mold 5 and the lower mold 3 are When stacking the molds, it is not necessary to misalign the jute a, and both the upper and lower molds 5 and 3 can be firmly brought into close contact with each other.

The method for manufacturing a juute-wrapped shoe sole according to the present invention includes:
Since the above-mentioned structure uses a foamable synthetic resin, the foaming of the resin presses the jute a against the inner circumferential wall of the mold, and the jute a is not deformed and the sole of the shoe is formed according to the dimensions. can do.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a juute-wound shoe sole manufacturing apparatus according to the present invention, and FIG. 2 is the same as shown in FIG.
3 is an explanatory diagram showing a state in which the upper mold with jute arranged is stacked on the lower mold, Figure 4 is a vertical cross-sectional view of the mold showing the molding state, and Figure 5 is the molded juute winding. FIG. 6 is a front view of the juute-wrapped sole, and FIG. 7 is an enlarged end view taken along the - line in FIG. 6. a... Jute, b... Sole body, 1... Pressing member,
2...Base, 3...Lower die, 4...Screw number, 5...Upper die, 6...
Thread, 7... Upper cover, 8... Lower mold surface, 9... Fitting hole, 10
...Top outer periphery mold, 11...Retaining groove, 12...Opening hole, 13
...Guide pin, 14...Lid plate, 15...Top inner mold, 1
6...Lower contact surface, 17...Upper side part, 18...Upper surface end.

Claims (1)

[Claims] 1. A foamable synthetic resin is injected into a mold in which the jute a is placed, and is foamed and hardened so that the upper side 17 of the jute a in the width direction extends from the upper end 18 of the sole body b. In the protruding state, jute a is attached to the periphery of the sole body b.
Jyute-wrapped sole with integrally fixed. 2 A retaining groove 11 provided around the upper peripheral mold 10 provided on the upper mold 5 and also on the lower contact surface 16 of the upper mold 5
After fitting one side in the longitudinal direction of the jute a, a foamable synthetic resin is injected into the mold in which the upper mold 5 is superimposed on the lower mold 3, and the upper mold 5 is covered with the upper lid 7 while being pressed. . A method for manufacturing a juute-wrapped shoe sole, which comprises foaming and curing the synthetic resin.