JPH0687809B2 - Injection molding shoe mold and method of processing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel mold used for molding a shoe sole in manufacturing an injection-molded shoe, and a novel processing method for producing the mold.

(Prior Art) Generally, the molding surface of each shoe sole mold for injection-molded shoes, especially the upper surface of the bottom mold and the inner peripheral surface of the side mold, are processed into a shape corresponding to the shape of the desired outer surface of the shoe sole. To be done. For example, in the case of a shoe that has a continuous pattern design in which the shoe sole peripheral surface called a tape portion repeats a wavy shape, the outer peripheral edge of the bottom mold upper surface and the upper edge of the side mold inner peripheral surface should have a repetitive corrugated shape that matches the design. It needs to be processed.

Conventionally, the method of repeatedly forming a waveform on the edge of these molds relies exclusively on machining such as cutting and grinding.

Specifically, first of all, the metal materials of these molds are fixed in a processing machine, and the mold materials are fixed,
As shown in FIG. 5, each of the upper surface peripheral edge 3 of the bottom mold 1 and the inner peripheral surface upper edges 4 of the left and right side molds 2a, 2b is divided by a fixed length (in the figure,
Widths B _{1 to} B ₁₄ , widths C _{1 to} C ₁₄ each), machining such as cutting is performed sequentially to form the unit shape of the desired repetitive waveform for each length, and finish each shoe mold. Was taken.

(Problems to be solved by the invention) However, an injection-molded shoe obtained by using such a conventional shoe sole mold has a repetitive corrugated design on the tape portion of the shoe sole, but the repetitive units of the corrugated design are each There is a problem that the length and shape are subtly different, and particularly in the toe portion and the heel portion, the repeating unit extends remarkably long and the corrugated discontinuous portion 11 occurs as shown in FIG.

On the other hand, in the case of handmade shoes, it is made by manufacturing each part, gathering and assembling them, and finishing it into one shoe, so when applying a repetitive corrugated design, tape of that design is put around the sole of the shoe. By wrapping and adhering, an accurate and regular corrugated design can be formed. Moreover, because the corrugated design is formed by machining the mold,
Unlike an injection-molded shoe in which the shape, type, etc. of the design are limited, there is an advantage that a wavy design of any shape and type can be formed.

By the way, in injection molding shoes as well, there is an increasing need to develop new products that give consumers a higher-grade impression in order to respond to the trend toward high-end products generally seen in recent market products. Despite the fact that they are shoes, products that look like handmade shoes have been demanded.

However, in the conventional injection-molded shoe obtained by using the above-mentioned conventional mold, as described above, the continuous design of the corrugations in the shoe sole tape portion is an irregular repeating design and has a discontinuous portion. However, it did not meet the above requirements because it did not have the luxury feel of handmade shoes.

The present invention has been made in consideration of the above situation, and one of the objects thereof is to design a repetitive waveform by simply performing injection molding according to a conventional method, and to form a very regular and discontinuous portion. What is not included is to provide an injection-molded shoe mold from which an injection-molded shoe formed around the sole can be obtained.

Another object of the present invention is to provide a method for processing an injection-molded shoe mold, by which such an injection-molded shoe mold can be manufactured by simple machining of a molding material.

(Means for Solving the Problem) The present invention, when finishing the upper surface of the bottom mold material and / or the inner peripheral surfaces of the left and right side mold materials by machining such as cutting, in each successive machining,
The cutting edge, grinding edge, etc. of the machine processing machine are always inserted at right angles to the surface to be processed of the mold material, and the cutting and grinding of the repetitive corrugated shape unit are performed, thereby the outer peripheral edge of the upper surface of the bottom mold. And / or the upper edges of the inner peripheral surfaces of the left and right side molds are formed in a repetitive corrugation that is regular and has no discontinuity over the entire peripheral edge.

Specifically, in the injection-molded shoe mold according to the present invention, regarding the outer peripheral edge of the upper surface of the bottom molding material and the upper edges of the inner peripheral surfaces of the left and right side molding materials, a linear shape and a portion close to the linear shape are described above. While the molding material is fixed, machining such as cutting is performed sequentially for each repetitive waveform shape unit to form repetitive corrugations, and the remaining curvilinear shape parts are rotated by the repetitive corrugation shape unit. Or, by performing machining according to a method of forming a repetitive waveform by sequentially performing machining such as cutting while changing the direction, the outer peripheral edge of the upper surface of the bottom mold and / or the upper edge of the inner peripheral surfaces of the left and right side molds. Is formed in a repetitive waveform that is regular and has no discontinuous portion over the entire peripheral edge.

Further, in the method for processing an injection-molded shoe mold according to the present invention, when finishing the upper surface of the bottom mold material and / or the inner peripheral surfaces of the left and right side mold materials by machining, the outer peripheral edge of the upper surface and the inner peripheral surface Of the upper edge, the straight and near-shaped portions are machined sequentially, such as by repeatedly cutting each shape unit of the repetitive waveform with the mold material fixed, to form the repetitive waveform, and the remaining curve shape The part (1) is characterized in that it is formed into a repetitive waveform by performing mechanical processing such as sequential cutting while rotating or diverting the mold material for each shape unit of the repetitive waveform.

(Summary of the Invention) In the present invention, a repetitive waveform that is formed on the upper peripheral edge of the bottom mold and / or the upper peripheral edge of the side mold over the entire peripheral edge is regular and has no discontinuous portion. However, its shape, size, etc. are arbitrary. For example, a round waveform, a triangular waveform, a zigzag waveform, a pulse waveform, etc. may be mentioned. Further, the repetitive waveform may have a shape in which large and small waves are repeated, for example, large waves and small waves are alternately repeated.

Further, the method of processing a mold according to the present invention is basically a method of forming a repetitive corrugation by machining such as cutting, but as a characteristic matter, among the outer peripheral edges of the upper surface of the bottom mold material, a linear shape and For the portion having a shape close to that, the molding material is fixed in the processing machine and sequentially machined for each shape unit of the corrugation, and for the remaining curved portion, the molding material is processed in the processing machine. In this, the machining is sequentially performed while changing the shape unit of the repetitive waveform. The same processing is performed on the upper edges of the inner peripheral surfaces of the left and right side mold materials.

(Operation) In the present invention, a repetitive corrugation that is regular and has no discontinuity is formed over the entire predetermined edge portion of each mold. Therefore, by injection molding using the mold, each repetitive unit A corrugated design having substantially the same shape and size and no discontinuity between corrugations is formed over the entire circumference of the shoe sole.

Further, in the present invention, for a linear shape or a shape close to it, the mold material remains fixed in the processing machine, and for a curved shape, the mold material is changed in the processing machine. While facing, the edge of the mold material to be machined is machined repeatedly for each shape unit of the corrugation, so that the repetitive corrugation is generated for the entire peripheral edge of the upper surface of the bottom mold and the entire upper edge of the inner peripheral surface of the side mold. It is formed regularly and without creating discontinuities.

(Examples) Hereinafter, the present invention will be described in more detail with reference to examples, but the following examples do not limit the present invention in any way.

As shown in FIG. 1, the mold of the embodiment has an upper peripheral edge 3 of the bottom mold 1 and left and right side molds 2a, 2b.
A repetitive waveform is formed on each of the upper edges 4 of the inner peripheral surface.

The repetitive waveform is formed for each of the outer portions 5a and the inner portions 5b having a shape close to a linear shape among the edge portions 3 and 4 at constant widths divided in parallel (widths A ₁ to
_{A 6, A 22 ~A 24)} , the curved toe portion 6a and the heel portion 6b
Is formed at constant widths while rotating around points p and q (widths A _{7 to} A ₂₁ , A _{25 to} A _{30 in the} figure).

This width A corresponds to the length of the shape unit of the repetitive waveform 7 illustrated in FIG. In the figure, (a) is a semicircular wave,
(B) shows a triangular wave, (c) shows a round wave, (d) shows large and small alternating waves, and (e) shows a pulse wave. The repetitive waveform 7 is not limited to these.

Next, the processing of the mold will be described. When finishing the upper surface of the bottom mold material and the inner peripheral surfaces of the left and right side mold materials by machining, the linear shape of the upper outer peripheral edge 3 and the inner peripheral surface upper edge 4 is used. With respect to the outer portion 5a and the inner portion 5b having a shape close to, a machining process such as sequential cutting is performed for each repetitive waveform shape unit A while the mold material is fixed to form a repetitive waveform 7 The toe portion 6a and the heel portion 6b were formed into a repetitive corrugation 7 by sequentially performing machining such as cutting while rotating the molding material for each repetitive corrugated shape unit A around the points p and q.

Then, injection molding was performed according to a conventional method using the mold of the example, and as shown in FIG. 3, the obtained injection molded shoe 8 had a shape of a repeating unit over the entire circumference of the sole 9. , To form a regular corrugated design 10 that is almost exactly the same in size. In particular, the formed corrugated design 10 had no discontinuous portion at the heel portion, as shown in FIG. The same applies to the toes, and the shoes produced look like handmade shoes, giving the viewer the impression of a luxury item.

(Effect of the Invention) As can be seen from the above description, the injection-molded shoe mold according to the present invention can be injection-molded according to a conventional method.
A repetitive corrugated design, in which each repeating unit has substantially the same shape and size and no discontinuity between corrugations, is used for handmade shoes formed around the entire sole. It is possible to mold such a high-quality injection-molded shoe.

Further, the method of processing the injection-molded shoe mold according to the present invention,
By simple machining of the molding material, it is possible to easily manufacture the mold of the present invention in which the repetitive corrugations are regularly formed without forming discontinuities, particularly in the toe part or the heel part.

[Brief description of drawings]

FIG. 1 is a plan view showing a shoe sole mold for an injection-molded shoe according to an embodiment of the present invention, and FIG. 2 is various types formed on the upper peripheral edge of the bottom mold and the upper peripheral edge of the side mold of FIG. FIG. 3 is a front view showing an injection molded shoe manufactured by using the shoe sole mold of FIG. 1, FIG. 4 is a view showing a heel portion of the injection molded shoe of FIG. 3, FIG. FIG. 5 is a plan view showing a conventional shoe sole mold for injection-molded shoes, and FIG. 6 is a view showing the heel portion of the injection-molded shoe of FIG. In the figure, 1 ... bottom mold 2a, 2b ... side mold 3 ... upper surface peripheral edge 4 ... inner peripheral surface upper edge 5a, 5b ... near straight line portion 6a, 6b ... curved portion 7 ... repetitive waveform 8 …… Injection molded shoes 9 …… Sole 10 …… Repetitive waveform design A _{1 to} A ₃₀ …… Repetitive unit of waveform

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Claims (2)

[Claims] 1. The outer peripheral edge of the upper surface of the bottom molding material and the upper peripheral edges of the left and right side molding materials of the inner peripheral surface having a linear shape and a shape close to the linear shape are repeatedly corrugated while the molding material is fixed. Perform machining such as sequential cutting for each shape unit to form a repetitive waveform, and for the remaining curved shape portion, perform sequential cutting while rotating or deflecting the mold material for each repetitive waveform shape unit. By machining in accordance with a method of forming a repetitive corrugation, the outer peripheral edge of the upper surface of the bottom mold and / or the upper peripheral edge of the inner surfaces of the left and right side molds are regularly formed over the entire peripheral edge. An injection-molded shoe mold, characterized in that it is formed in a repetitive waveform with no discontinuities. 2. In finishing the upper surface of the bottom mold material and / or the inner peripheral surfaces of the left and right side mold materials by machining, a linear shape and a shape close to the linear shape of the outer peripheral edge of the upper surface and the upper edge of the inner peripheral surface. With respect to the shape part, the above molding material is fixed, and machining such as cutting is sequentially performed for each shape unit of the repetitive waveform to form a repetitive corrugation, and the above molding material is repeated for the remaining curved shape part. A method for processing an injection-molded shoe mold, characterized in that machining such as cutting is sequentially performed while rotating or deflecting each waveform shape unit to form a waveform repeatedly.