阅读说明：本技术 鞋中底模具 (Insole mould ) 是由 河圭烈 于 2018-06-22 设计创作，主要内容包括：本发明涉及鞋中底模具,作为由具有成型凸起部和多个排气孔的上部模具和具有成型槽和多个排气孔的下部模具形成,所述成型凸起部和成型槽对称地一致的鞋中底模具,其特征是,上部模具的多个成型凸起部和下部模具的多个成型槽非对称地向一方向形成,所述多个成型凸起部(13)和多个成型槽(23)的脚拇趾部分形成的多个排气孔与多个脚拇趾的距离相应地较宽地形成。本发明的鞋中底模具是,防止排气孔集中于模具的脚拇趾部分的现象而提升耐久性,减少成型槽之间的排列间隔而与现有的模具相比,一面上可以排列三片或四片成型槽,将模具规格与加热板的规格较接近地设定而节省能源,增加生产性,进一步节省制造费用。(The invention relates to a middle sole mould, which is formed by an upper mould with a forming convex part and a plurality of vent holes and a lower mould with a forming groove and a plurality of vent holes, wherein the forming convex part and the forming groove are symmetrically consistent, and the middle sole mould is characterized in that the forming convex parts of the upper mould and the forming grooves of the lower mould are asymmetrically formed in one direction, and the vent holes formed by the foot big toe parts of the forming convex parts (13) and the forming grooves (23) are formed to be wider corresponding to the distance of the foot big toes. The insole mould of the invention prevents the exhaust holes from concentrating on the foot toe part of the mould to improve the durability, reduces the arrangement interval between the forming grooves, and compared with the existing mould, one surface can be arranged with three or four forming grooves, the specification of the mould is set to be closer to the specification of the heating plate to save the energy, increase the productivity and further save the manufacturing cost.)

1. A midsole mold formed of an upper mold (10) having a plurality of forming projections (13) and exhaust holes and a lower mold (20) having a plurality of forming grooves (23) and exhaust holes, the plurality of forming projections (13) of the upper mold (10) and the plurality of forming grooves (23) of the lower mold (20) being engaged with each other, characterized in that,

a plurality of forming convex parts (13) of an upper die (10) and a plurality of forming grooves (23) of a lower die (20) are asymmetrically formed in one direction, and a foot thumb part of the plurality of forming convex parts (13) and the plurality of forming grooves (23) is formed with a plurality of exhaust holes which are wider corresponding to the distance between the plurality of foot thumbs.

2. The midsole mold of claim 1,

the upper die (10) is provided with a left foot or right foot forming bulge (13) for forming three or four pieces by positive etching, and the lower die (20) is provided with a left foot or right foot forming groove (23) for forming three or four pieces by negative etching.

3. The midsole mold of claim 1,

the upper die (10) and the lower die (10) are connected through a hinge, and the diameter of the exhaust hole is 0.1-0.9 mm.

Technical Field

The invention relates to a shoe insole mould, in particular to a shoe insole mould which is formed by a specific structure and increases the number of forming grooves in a limited mould area or space, thereby saving the number of mould making surfaces, increasing the production capacity, effectively managing the heat transfer area of a heating plate and saving energy.

Background

Generally, a sole is divided into an outsole, a midsole and an insole. The mid-sole mold is classified into a secondary foaming (phylon) mold, also called EVA (Ethylene Vinyl Acetate), a Polyurethane (Polyurethane) mold, an injection mold, etc., according to the material used and the operation method, and the present invention relates to the secondary foaming mold.

The secondary foaming mold (hereinafter referred to as mold) is formed of an aluminum material having high thermal conductivity, light weight and high strength.

In order to directly form various shapes or complicated shapes of parts (blocks) of the midsole of the shoe formed on the mold on the product and realize the production, the exhaust hole for exhausting gas generated inside the mold to the outside is required in the production process of the product, and because the gas generated when the foaming body such as sponge is put inside the mold and is pressurized and heated forms a layer with a certain space between the sculpture of the mold and the foaming body, the shape and the sculpture formed on the mold cannot be directly formed on the product.

Generally, a mold is composed of an upper mold having a molding protrusion of a specific shape and a lower mold having a molding groove into which the molding protrusion is inserted.

In the conventional mold, as shown in fig. 1 and 2, a molding protrusion 3-2 and a molding groove 4-2 are arranged in a left-right symmetrical manner in an upper mold 1 and a lower mold 2, which are provided with several tens of (only four are shown for convenience) exhaust holes 1-1, 2-1. However, the vent holes are particularly formed in the most protruding part of the medial joint of the big toe, and the carving of the mold is concentrated on the vent holes in order to highlight the soft function of the shoe. Such a plurality of exhaust holes are concentrated on a specific portion, which may reduce the strength of the mold, and may cause cracks due to impact or the like during compression, thereby reducing the life of the mold.

In korean registered utility model No. 20-0244331 (EVA shoe sole molding die), an EVA shoe sole molding die is described, according to which a plurality of through holes 1-1 are formed on one side surface of an upper plate 1, and a male die 3 having a convex pattern 3-2 is butted on an outer circumferential surface, and a hollow chamber 3-1 is formed while being twisted integrally with the upper plate 1 by a fastening bolt 1-2, a plurality of through holes 2-1 are also formed on one side of a lower plate 2, and further a female die 4 having a concave portion 4-2 is butted on the outer circumferential surface, and a hollow chamber 4-1 is formed while being twisted integrally with the lower end 2 by the fastening bolt 2-2.

In the conventional mold, as shown in fig. 1 and 2, a molding protrusion (3-2) and a molding groove (4-2) are symmetrically arranged on one surface of an upper mold (1) and a lower mold (1) in a left-right direction, respectively, and the highest protrusion (inner foot thumb portion) of a foot portion is symmetrically arranged in a left-right direction on a center line of the mold, and a plurality of exhaust holes are formed in the center line, so that the interval between the molding protrusion or the molding groove of the left foot (hereinafter, left foot) and the molding protrusion or the molding groove of the right foot (hereinafter, right foot) of the mold is maintained at least 50mm for strength reduction due to the exhaust holes.

The midsole mold is designed to cover the foot of all persons and has a size of 330mmx430mm, and the hot plate size of the heat transfer area of the press for heating and compressing is 450mm x450 mm.

In the limited area of the mold as described above, the inner big toe joint part of the sole bottom surface, i.e., the two most protruded parts, are symmetrically arranged, so that the exhaust holes are more concentrated, the mold is cracked during compression molding to deteriorate the durability of the mold, or the molding grooves or molding protrusions of the left and right feet are widely spaced but have a limited width, and thus, more area is heated to cause a problem of large energy consumption.

The size of the hot plate is larger than that of the mould, so the heat loss is about 26.6%.

Disclosure of Invention

Technical subject

The invention aims to provide a midsole mold which can enhance the durability of the mold, further prolong the service life of the mold, improve the energy efficiency, reduce the number of mold making surfaces and increase the production capacity.

In this specification, the molding groove is mainly described for convenience, since the molding protrusion of the upper mold and the molding groove of the lower mold are identical in size.

The present inventors have found that the lengths of the inner side and the outer side of the left foot or the right foot of the center line between the left foot and the right foot forming grooves of the mold are different, and thus, in order to prevent the forming grooves of the left foot or the right foot from being asymmetrical, that is, in order to prevent the exhaust holes from being concentrated on the thumb part of the foot by forming only the forming grooves of the left foot or the right foot on one side of the lower mold, the arrangement interval between the conventional forming grooves may be reduced from 50mm to 25mm, and further, the fact that the number of forming grooves on one side of the conventional mold, which can have only two pieces, is increased to three, and the number of infant or child may be increased to four, has accomplished the present invention.

Technical scheme

To solve the above problems, the present invention provides a midsole mold comprising an upper mold having a plurality of molding protrusions and air discharge holes and a lower mold having a plurality of molding grooves and air discharge holes, wherein the plurality of molding protrusions of the upper mold and the plurality of molding grooves of the lower mold are engaged with each other, the plurality of molding protrusions of the upper mold and the plurality of molding grooves of the lower mold are asymmetrically formed in one direction, and the plurality of air discharge holes are formed to be wider in accordance with the distance from the plurality of toes in the foot sole of the plurality of molding protrusions and the foot sole of the plurality of molding grooves.

As a preferred embodiment of the present invention, there is provided a midsole mold, wherein the upper mold has a left foot or right foot forming protrusion formed thereon to be male-engraved with three or four pieces, and the lower mold has a left foot or right foot forming groove formed thereon to be female-engraved with three or four pieces.

As another preferred embodiment of the present invention, there is provided a midsole mold, wherein the upper mold and the lower mold are connected by a hinge, and the diameter of the air vent is 0.1 to 0.9 mm.

Advantageous effects

The mold of the present invention has the left leg or right leg forming grooves in the lower mold and the left leg or right leg forming lugs in the upper mold arranged asymmetrically to avoid concentration of the exhaust holes in the foot toe part of the mold, raise durability and reduce the interval between the forming grooves.

Three left legs and three right legs on the die surface are manufactured separately during operation, so that the direction of the product center line of each die is constant, an operator can operate each die in a certain direction at a certain position to reduce the fraction defective of the product and reduce the fatigue feeling. Management of the platen heat transfer area (platen specification: 450x450 mm) of the press becomes efficient, thereby saving energy.

The heat transfer area of the hot plate is effectively managed, energy is saved, operation is standardized, and the defective rate is reduced.

Drawings

FIG. 1 is a schematic perspective view of an upper mold and a lower mold of the prior art invention;

FIG. 2 is a plan view showing the arrangement of the left and right legs of the mold of the prior art;

FIG. 3 is a perspective view of the upper and lower molds of the present invention;

fig. 4 is a plan view of an embodiment of the child or child-use mold showing that only the molding grooves of the left foot mold of the present invention are arranged.

Detailed Description

The following detailed description of preferred embodiments of the invention is provided in order to provide a thorough understanding of the invention. The embodiments of the present invention may be modified into various forms, but the scope of the present invention is not limited to the following embodiments.

In describing the present invention, a detailed description of known functions and configurations will be omitted when it may make the gist of the present invention unclear.

Fig. 1 is a schematic perspective view of an upper and lower mold of the conventional invention, fig. 2 is a plan view showing an arrangement of left and right legs of the mold of the conventional invention, fig. 3 is a perspective view of an upper mold and a lower mold in which only a forming protrusion 13 of the left leg and only a forming groove 23 of the left leg of the present invention are formed into three pieces, respectively, and fig. 4 is a plan view showing an embodiment of a mold for infant or child use in which only the forming groove 23 of the left leg of the lower mold of the present invention is arranged into four pieces.

For ease of understanding, the process for manufacturing the secondary foamed product is illustrated with a secondary foaming mold.

The mold is made of aluminum material with high thermal conductivity, light weight and high strength. The secondary foamed product is manufactured by processing a thermoplastic sponge into a certain shape, putting the shape into a die, putting the die into a hot press (the temperature is 150 ℃, the pressure is 80 kg/㎠, the time is 400 seconds), and then compressing the die by a cold press (the temperature is 5-30 ℃, the pressure is 80 kg/㎠, the time is 400 seconds).

In the hot pressing process, foaming agent gas in the sponge is generated, and the sponge forms a mold shape and a carving shape through the pressure in the mold. At this time, air and a generated gas layer formed between the engraved surface of the mold and the sponge should be removed to make the thermoplastic sponge have good fluidity and to form the complete shape by fine engraving or etching of the mold, but if there is no vent hole in the mold and the gas layer is not removed, the engraving or the shape cannot be completely displayed and all defects occur.

Because of these problems, it is also important that the vent holes are absolutely necessary when manufacturing the secondary foaming mold, but the size of the mold is changed due to the vent holes, which also has a great influence on the service life of the mold.

The midsole mold of the present invention is formed of an upper mold 10 and a lower mold 20, as shown in fig. 3, the upper mold 10 having male-engraved molding protrusions 13, and the lower mold 20 having female-engraved molding grooves 23. The upper and lower molds 10 and 20 have a plurality of vent holes, respectively, which are well known in the art and thus will not be described in detail herein.

The upper surface of the lower mold 20 is provided with lower molding grooves 13 formed by intaglio for molding the midsole, and in this case, two molding grooves are symmetrically arranged on one surface of the conventional mold, but the present invention is asymmetric arrangement, and the molding grooves 23 of the lower mold may be formed into three left or right feet. Only the left foot forming groove 23 is illustrated in this specification for convenience.

The upper mold 10 is connected to the lower mold 20 by a hinge (not shown) and can be opened or closed. The face of the upper mold facing when the lower mold 20 is closed has forming projections 13 symmetrically aligned with the forming grooves 23 of the lower mold to form and arrange three pieces each by male engraving. In the present specification, the upper molding protrusion 13 of the upper mold 10 is shown as a male notch, and the lower molding groove 23 of the lower mold 20 is shown as a female notch, but may be formed in reverse for convenience. For example, if a certain mold has left foot forming protrusions 13 arranged and formed in 3 pieces each by male engraving, another certain mold which can be opened or closed by a hinge has left foot forming grooves 23 formed in 3 pieces each by female engraving.

The basis of the present invention is that the upper and lower molds 10, 20 are connected by a hinge (not shown) and opened or closed, fig. 3 shows an embodiment in which the hinge is not used, fig. 3 shows an embodiment in which the lower molding groove 23 of the lower mold 20 is engraved in the negative and the upper molding protrusion 13 of the upper mold 10 is engraved in the positive.

The forming convex part 13 of the upper die 10 and the forming groove 23 of the lower die 20 comprise a plurality of exhaust holes for exhausting generated gas to the outside during the forming of the shoe insole, the diameter of the exhaust holes is 0.1-0.9 mm, but the position and the diameter of the exhaust holes can be changed according to the size and the specification of the shoe.

The reason why the length of the long side of the external rectangular shape of the mold is 450mm or less is that the transverse length of a hot plate of a general press is 450mm, so that it is convenient for an operator to put the hot plate in or out by hand, and the other reason is that the mold is larger than the specification of the press, and cannot be inserted, so that the mold is specified to have the above-mentioned size.

FIG. 4 shows an embodiment of 4 sheets each formed if the forming grooves are small when made for infant or child use.

The present invention configured as described above will be described in detail below.

As shown in fig. 3, the midsole mold of the present invention includes: and an upper mold 10 connected to the lower mold 10 by a hinge and opened or closed, an upper molding protrusion 13 formed on a surface facing the lower mold 20 to male-engrave and align each of the three left legs, and a lower mold 20 formed on an upper surface of the lower mold to female-engrave and align each of the 3 left legs, and a molding groove 23 of the lower mold.

As shown in fig. 4, as still another preferred embodiment of the midsole mold of the present invention, comprises: and an upper mold 10 connected to the lower mold 10 by a hinge and opened and closed, having upper forming protrusions 13 on a surface facing the lower mold 20 to male-etch the upper mold 10 on which four left legs are formed and arranged, respectively, and a lower mold 20 on which forming grooves 23 of the lower mold are female-etched on the lower mold 20 on which four left legs are formed and arranged, respectively.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications or equivalents may be made to the teachings of the embodiments described above without departing from the scope of the invention.

Description of the symbols

10: an upper mold; 13: an upper molding boss;

20: a lower mold; 23: and a lower molding groove.