JPH07214699A - Mold of shoe sole - Google Patents

Abstract

PURPOSE:To provide the mold at a low cost by constitutional parts freely convertible corresponding to the alteration of the earth surface bottom of a shoe sole especially high in functionality by overcoming the defect of a conventional shoe sole. CONSTITUTION:A fitting plate (d) fitting an earth surface bottom 14 and the base plate C supporting the plate (d) and connected in a freely detachable and replaceable manner by a connection plate 8 and forming a gas venting gap 4 between the peripheral wall of the through-hole of a recessed part 2 and the base plate C are fitted and arranged to the region corresponding to the earth surface bottom 14 of a shoe sole in the recessed part 2 of the lower mold (b) of a mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a shoe sole molding die for an athletic shoe, in which a grounding surface sole and a midsole are integrally molded.

[0002]

2. Description of the Related Art A conventional mold for a sole of an athletic shoe, in particular, a sole for integrally joining a bottom of a grounding surface and a midsole is known.
A design is formed that matches the irregularities of the grounding surface of the grounding surface that fits at least the bottom surface of the front stepping portion side in the recess of the lower mold, and the foamed already cross-linked or existing After inserting the grounded sole piece of the accelerating solid body, insert the foamed midsole material on itself, cover the lower mold with the upper mold and heat and press for a certain time to mold the shoe sole. there were. However, since the athletic shoes have high fashionability and the life cycle is gradually shortened,
It was very uneconomical because the design of the new shoe sole, mainly the ground contact surface sole, was improved in a short period of time, and an expensive molding die had to be rebuilt each time. (In addition, when the grounding surface bottom piece is inserted without providing the grounding surface bottom type design on at least the bottom surface of the front stepping part side in the recess of the lower die, after heating the midsole material for a certain period of time after inserting the midsole material. If so, the uneven design on the grounding surface side of the inserted grounding surface bottom piece is deformed by pressure and heating, and there were defects such as not only the decrease in commercial value but also the non-slip function being impaired.)

[0003]

DISCLOSURE OF THE INVENTION The present invention overcomes the deficiencies of conventional molding dies, and is especially removable and replaceable in response to changes in the design and design of the sole of the shoe sole, which is highly functional and fashionable. It is an object of the present invention to suppress cost improvement by using the component parts of.

[0004]

The lower mold b of the mold of the present invention.
In the concave portion 1, at least a portion corresponding to the design and design of the ground contact surface of the shoe sole is provided with a replaceable fitting plate d and a base c, and a gas vent is provided between the base c and the lower mold b. A novel means is to provide the gap 4 and the guide groove 12, and fit and tighten the connecting plate 8 in the guide groove 12.

[0005]

In the shoe sole mold according to the present invention, the fitting plate d having the holes 10 and 10 corresponding to the non-slip projections on the grounding surface side of the grounding bottom of the shoe sole and the base c supporting the fitting plate d are removed. Since they can be replaced freely, various shoe soles with various midsoles with various anti-slip projections can be easily molded at low cost.

[0006]

EXAMPLES The following is a description of the shoe sole mold A of the present invention in accordance with a typical example shown in the drawings. First, as shown in FIGS. 1 and 2, the mold A of the present invention has a shoe sole B.
An upper mold a having a downward convex portion 2 forming the upper surface side of
Similarly, a lower mold b having a concave portion 2 forming the lower surface side of the shoe sole B.
It is configured with In particular, the main part of the molding die A is a lower die b, and the lower die b has a through hole 3 of the grounding surface bottom shape in a portion corresponding to the grounding surface bottom 14 of the shoe sole B in the recess 2. A through hole 3 is formed in the through hole 3 to form a gas venting gap 4 between the through hole 3 of the lower die b and the peripheral wall of the through hole 3, and the ground contact surface bottom of the shoe sole B in the recess 2 of the lower die b. The base C forming the lower stepped portion 5 is fitted and installed on the upper surface corresponding to 14, and the lower surface 7 of the lower mold b and the lower surface 6 of the base C are connected in series as shown in FIGS. 2, 6 and 7. The connecting plate 8 is fitted into the guide groove 12 provided in the lower mold b, and the lower surface 7 of the lower mold b and the lower surface 6 of the base C are tightened and connected by the fasteners 9, 9. At this time, the connecting plate 8 is fitted into the guide groove 12 connecting the lower surface 7 of the lower mold b and the lower surface 6 of the base C, and the holes 13 and 1 provided in the connecting 8
The fasteners 9 and 9 are connected to each other inside the base 3 so that the base C and the lower mold b can be removed and exchanged freely. In addition, the shoe sole B has a ground surface bottom shape, and a recessed portion of the lower die b is a recessed portion into which the protrusions 10 and 10 of the grounded bottom surface 14 are fitted, or a fitting plate d into which the through holes 11 and 11 are fitted. Lower step 5 in 2
Insert and set inside. Known components such as aluminum alloy, steel, stainless steel, etc. are used for the above-mentioned constituent parts of the mold A for the shoe sole, that is, the upper mold a, the lower mold b, the base plate c and the fitting plate d. Any material with good conductivity may be used. Particularly, the fitting plate d is preferably made of stainless steel or soft graphite material. A method for molding a desired shoe sole B with a midsole using the shoe sole molding die A according to the present invention is as follows. Deliver or press-inject a solid material or foam of natural rubber, synthetic rubber, synthetic resin or a mixture of two or more of these with a molding die (not shown) for molding the grounding surface bottom 14 in advance, and press-inject it. 1
4, the ground contact surface bottom 14 is placed on the fitting plate d, and the protrusions 10, 1 of the ground contact surface bottom 14 are placed as shown in FIG.
0 is fitted and fixed in each through hole or recess 11, 11 of the fitting plate d, and the fitting plate d with the ground surface bottom 14 is fitted in the lower stepped portion 5 in the recess 2 of the lower mold b. Install. Next, as shown in FIG. 8 and FIG. 9, a mid-sole material of already-foamed synthetic resin is put in the recess 2 of the lower mold b and on the ground contact surface bottom 14 at the front stepped portion in the recess 2 as well. Then, the lower mold b containing the midsole material is sealed with the upper mold a and the desired temperature 1
By heating and pressurizing at a pressure of about 5 Kg / cm for about 4 to 5 minutes at 50 ° C., the midsole 15 is bonded and molded on the ground surface bottom 14,
By removing the upper mold a from the lower mold b, a desired shoe sole B as shown in FIGS. 10 and 11 can be provided.

[0007]

The shoe bottom mold A according to the present invention is provided in the recess 2 of the lower mold b at a position corresponding to the ground contact surface bottom of the shoe bottom, and the base plate c is fitted in the through hole 3 to form a continuous structure. Since the plate 8 and the fasteners 9, 9 and the like are attached to the lower bottom b so as to be detachable and exchangeable, the shape of the grounding surface bottom of the shoes bottom, particularly the warp shape, can be replaced according to the change. Similarly, the upper surface of the base c and the lower mold b
The lower die b having a different bottom surface (design surface) can only be newly formed because the fitting plate d for fitting the protrusion of the bottom of the grounding surface that changes on the lower stepped portion 5 formed by the concave portion 2 can be replaced. Compared with the above, not only can it be handled at a much lower cost, but also the unevenness of the ground contact surface sole of the shoe sole will not be damaged. Further, when the upper mold a is heated and pressed while the lower mold b is sealed, the air and gas present between them and between the midsole material, the bottom of the grounding surface and the fitting plate d are transferred to the through hole 3 wall of the lower mold b. Since the desired shoe sole B can be accurately formed by discharging the gas from the degassing gap 4 between the outer circumferences of the base c, it is possible to provide a product that does not impair the commercial value.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a molding die according to the present invention.

FIG. 2 is a schematic cross-sectional view of the same molding die.

FIG. 3 is a schematic perspective view of the lower mold of the mold seen from above.

FIG. 4 is a schematic diagram of a slope on the lower surface side of the fitting plate of the molding die.

FIG. 5 is a schematic cross-sectional view of a state in which the ground contact surface sole of the shoe sole is also fitted to the fitting plate.

FIG. 6 is a schematic oblique view showing the lower surface 7 side of the base used for the molding die.

FIG. 7 is a schematic perspective view of a connecting plate and a fastener used in the mold as well.

FIG. 8 is a schematic vertical cross-sectional view showing the state immediately before the molding of the shoe sole with the same molding die.

FIG. 9 is a schematic cross-sectional view showing a state immediately before the molding of the shoe sole with the same molding die.

FIG. 10 is a schematic plan view showing the ground contact surface bottom side of the shoe sole that is similarly hardened and molded by a molding die.

FIG. 11 is a schematic side view of the shoe sole.

[Explanation of symbols]

 A forming mold B shoe sole a upper mold b lower mold c base d fitting plate 1 convex part 2 concave part 3 11 and 13 through hole 4 degassing gap 5 lower stepped part 6 and 7 lower surface 8 connecting plate 9 clamp 10 protrusion 12 Guide groove 14 Ground plane bottom 15 Midsole

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B29C 33/10 8823-4F // B29L 31:50

Claims (2)

[Claims] 1. A shoe sole molding die comprising an upper die a having a convex portion 1 of the upper surface side of the sole on the lower surface side and a lower die b having a concave portion 2 of the lower surface side of the shoe sole on the upper surface side. , The lower mold b
To the extent that a gas venting gap 4 can be formed between the through hole 3 and the through hole 3 at least on the grounding surface of the shoe sole at least on the front stepped portion side of the bottom surface of the recess 2 A base c having an upper surface forming a lower stepped portion 5 which is smaller than the concave portion 1 of the lower mold b by the thickness of the ground contact surface bottom shape of the shoe sole. Lower surface 6 and the lower mold b
A lower surface 7 of the shoe sole is connected to a connecting plate 8 by a plurality of fasteners 9, 9, and the lower surface of the shoe bottom is formed in the lower stepped portion 5 of the lower mold b. A shoe sole molding die, wherein a fitting plate d having a through hole 11 into which each of the sole projections 10 is fitted is inserted. 2. A guide groove 12 into which the connecting plate 8 is fitted is formed on the lower surface 7 of the lower mold b and the lower surface 6 of the base c, and the connecting plate 8 and the fasteners 9 and 9 form the base. c and lower mold b
The shoe bottom molding die according to claim 1, wherein