JPH0528121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a mold for a sole or outsole of a sports shoe, in particular a mold for a sole or outsole made of a combination of sole materials of different types or colors.

<Prior Art> For example, as shown in FIGS. 1 and 1, the first molding die D does not use a middle mold, but has a lid-shaped upper mold A with a flat lower surface side and an outer peripheral-shaped recess 30 on an upwardly opening outer bottom. and a lower mold D having a plurality of recesses 33 in the form of anti-slip protrusions on the bottom surface thereof, and the mold D has a desired amount of one kind in each of predetermined portions 32, 32 in the recesses 30 of the lower mold C. Alternatively, the first bottom material m of multiple types or colors is stored, and a desired amount of the second bottom material n is stored on the sides of the recess 31 excluding a predetermined portion, and the lower mold material containing the plurality of bottom materials is In an attempt to manufacture an outer sole (E) having a large number of anti-slip protrusions 21, which is formed by integrally bonding and molding these plurality of bottom materials by closing them with the upper mold A and simultaneously vulcanizing them using Kochi vulcanizing means. It was something to do. Also, as shown in Figures 2 and 2, the second mold F does not use a middle mold, but has a lid-shaped upper mold A with a flat lower surface, and a spiked bottom-shaped recess with an upward opening on the upper surface. 3
1 and a lower mold C in which a plurality of shallow recesses 34, 34 are formed at predetermined portions within the recess 31, and a plurality of deep recesses 35, 35 in a shape corresponding to spikes are formed at predetermined portions other than the formation portions of the shallow recesses 34, 34. The mold F has the recess 3 of the lower mold C.
A desired amount of the first bottom material m is stored in each of the shallow recesses 34 in the first bottom material m, a desired amount of a second bottom material n of a different type or color is stored on the first bottom material m, and then, at the same time, a well-known The objective was to obtain an outer sole E etc. with a plurality of spikes 22 formed by integrally bonding and molding these plural types or plural colors of sole materials using vulcanization means.

For example, as shown in FIGS. 2 to 2, in order to manufacture a tall spiked shoe sole or an outsole E, the third mold is first formed by forming an upper mold A with a flat lower surface side and a predetermined portion on the lower surface side. The lower mold (C) described below has a plurality of protrusions 36 that close a plurality of shallow recesses 34 provided at predetermined positions within the upwardly opening recess 31 on the upper surface side, and the above-mentioned upper-opening recess 31. and a plurality of shallow recesses 34, 34 in the recess 31 at locations corresponding to the respective protrusions 36 on the lower surface side of the medium-sized B, and deep spike-shaped recesses 35, 35 at predetermined locations other than the formation sites of the respective shallow recesses 34. The mold F is formed from a lower mold C provided with a desired amount of the initial bottom material m stored in each of the shallow recesses 34 in the recess 31, and The lower mold C is closed by overlapping the middle mold B and the upper mold A, and is then subjected to primary vulcanization for a relatively short period of time, for example, about 20 seconds to 1 minute, so that the bottom material n is not completely vulcanized yet, but remains constant. Molding a primary molded product m that maintains the shape of
The upper mold A and the middle mold B are removed from the lower mold C, and a desired amount of the second bottom material n of a different type or color is stored on the primary moldings m and m in the recess 31 of the lower mold C. The lower mold C containing the bottom material n is closed with the upper mold A, and is vulcanized by a known vulcanization means to form spikes 22, 22 in which the bottom material m and the primary molded product m are integrally bonded and molded. The purpose is to obtain the soles, etc. of shoes.

<Problems to be Solved by the Invention> In the first of the conventional molding molds mentioned above, each bottom material tends to flow easily due to heating during vulcanization molding at the same time, and also easily moves due to pressure. Because of this, they crossed boundaries and got mixed up, and the molded product after vulcanization had defects that deteriorated its appearance and lost its commercial value.

Similarly, in the second conventional mold mentioned above, because the second bottom material is overwhelmingly large,
The bottom material forces out a relatively small amount of one or more types or colors of initial bottom material from within each shallow recess, so that the first bottom material is formed into a predetermined shape at a predetermined location. There was also a defect in which a molded product could not be obtained, resulting in a defective product with no commercial value.

Furthermore, in the same manner, the third conventional molding die has one recess in each recess at a predetermined position in the recess of the lower mold.
During secondary vulcanization, at least a portion of the primary molding of the first bottom material of the type or colors or colors is formed in each of the shallow depressions by an overwhelming amount of the primary molding of the second bottom material. It is extruded from the inside, and after secondary vulcanization, it forms part of the base of the secondary shape of the second bottom material and part of the periphery of each spike part, and in the same way, the external appearance is significantly changed. Although there were defects that caused damage and reduced the value of the product, the purpose of this was to overcome these defects and improve productivity.

<Means for Solving the Problem> As a means for achieving the above-mentioned object, the present invention comprises an upper mold, a middle mold, and a lower mold, and the upper mold opens downward at a predetermined portion on the lower surface side thereof, and the opening edge molds a large number of recesses or grooves smaller than the bottom surface, the middle mold forms a recess or recess that opens upward to accommodate the initial bottom material at a predetermined location on the upper surface side of the middle mold, and the same lower mold forms a recess or recessed part that opens upward in a predetermined part on the upper surface side of the middle mold. A recess opening upward is formed in a predetermined portion of the mold to store different types of bottom materials, and these lower molds, middle molds, and upper molds are sequentially stacked and closed, and the first bottom material in the middle mold and the bottom material in the lower mold are Shoes characterized by having a configuration in which a second sole material is primarily vulcanized, an upper mold with a primary molded material of the first sole material is overlapped with a lower mold, closed, and then secondary vulcanization can be performed. The bottom is mainly a mold for the outer sole, and the middle mold has a protrusion protruding downwardly at a predetermined portion on its lower surface side, which can partition the effective material and the removed material in different types of bottom materials, or A plurality of protuberances are formed at predetermined portions on the sides to close recesses for accommodating bottom materials of different types or different colors on the lower mold, and similarly, the lower mold has recesses for accommodating predetermined bottom materials of different types on its upper surface side. A plurality of upwardly directed recesses in the shape of spikes are formed in predetermined areas except for the above.

<Operations and Effects> The mold for the sole of the present invention, mainly the outer sole, is composed of an upper mold, a middle mold, and a lower mold. When the second bottom material is primarily vulcanized, a plurality of depressions or grooves are formed in advance at predetermined locations on the lower surface of the upper mold, the opening edges of which are smaller than the bottom surface. A portion of the bottom material is filled and molded. Therefore, when the upper mold is removed from above the middle mold after the first vulcanization, the temporary molded product cast from the middle mold is attached to the lower surface side of the upper mold. Not only does it not require the trouble of molding out the material, but also the primary molding product molded from the middle mold can be used for primary molding of other bottom materials in the recess of the lower mold by simply closing the lower mold with the upper mold. It was possible to smoothly transition to secondary vulcanization without requiring any means for placing it on the object, and productivity was significantly improved.

In addition, the mold of the present invention has the middle mold and the upper mold stacked one after another on the lower mold, and the first or different second bottom material is mainly placed between the upper mold and the middle mold in the lower mold between the middle mold and the lower mold. primary vulcanization of the dissimilar second bottom material or the first bottom material in a relatively short period of time, e.g. to such an extent that the bottom material is not fully vulcanized but merely maintains the desired formation, and after said primary vulcanization, said After the excess bottom material in the lower mold is removed, the primary molded product adhering to the lower surface of the upper mold is fitted and stored in close contact with the primary molded product in the lower mold.
(Usually, the desired amount is the total amount equivalent to the volume of the predetermined dent or recess, plus some extra amount, so the extra amount of bottom material may be one of the defects mixed in at the boundary between multiple bottom materials.) ) Therefore, shoes with high commercial value in which molded parts of multiple types or colors can be formed at precise boundaries or in predetermined positions, and sole materials of multiple types or colors can be integrally molded. As the sole owner, we were able to provide the outer sole.

<Example> An example of a mold A for a shoe sole, mainly an outer sole, according to the present invention will be described below with reference to the drawings. First, as shown in FIG.
is composed of an upper mold a, a middle mold b, and a lower mold a. The upper mold a has a plurality of downwardly opened recesses or grooves 1 on its lower surface side, and the recesses or grooves 11 are formed so that the opening edge 12 thereof is smaller than the bottom surface 13 thereof. The medium b has a plurality of recesses 4 for storing the first bottom material d at a predetermined portion on its upper surface side, and around each recess 4, an overhanging surplus portion f corresponding to the excess amount is stored. A recess 6 is provided at a predetermined position on the lower surface side of the lower mold c, and a recess 9 that opens toward the upper surface of the lower mold c and has a large number of small non-slip protrusion-shaped recesses 10 on the bottom surface of the lower mold is provided with a recess 6 in which a foreign material is housed. the second of
A plurality of protrusions 7 having ladder-shaped recesses 8 partitioning the bottom material e are provided.

Next, the method of using the mold A, ie, the method of manufacturing the desired outer sole B, is shown in FIGS. 4 I to V as follows. First, as shown in FIG. 4I, a desired amount of the first bottom material d is stored in the recesses 4, 4 of the middle mold b, and a similar desired amount of the second bottom material e of a different type is placed in the bottom. It is stored in the recess 9 of type c.

Next, as shown in FIG. 4, the middle mold b is stacked on top of the lower mold c, and the upper mold c is stacked on top of the middle bottom b in order, and the mold is closed. The bottom materials d and e have been temporarily vulcanized to form a predetermined shape, but have not yet been completely vulcanized to form primary molded products d' and e'. Then, when the upper mold a is removed from above the middle mold b, the upper mold a has a primary molded product d' in each recess or groove 1 at a predetermined location on the lower surface side of the upper mold a, as shown in FIG. The primary molded products d' and d' are attached in a partially fitted state.
Moreover, the first bottom material d is not present in each recess 4 at a predetermined portion on the upper surface side of the medium size b, and the recesses 6 and 6 outside the protrusion 5 around each recess 4 are not present.
a protruding portion f of said primary first bottom material e within;
only remains. Each protruding portion f
Just remove it. Next, in the lower mold e, a primary molded product of a different type of second bottom material is placed in the recess 9.
e', e' are partitioned into a necessary molded part and surplus molded parts g, g by respective protrusions 7 projecting downward from a predetermined portion on the lower surface side of the middle mold b. Then, when unnecessary surplus moldings g are removed, the primary molding of the first bottom material is placed in a predetermined part of the lower mold b.
A space is formed that can accommodate d′ and d′. Therefore,
When the lower mold c is closed with the upper mold a, the upper mold a
The primary molded products d and d' are fitted and stored in the space within the recess 9 of the lower die c. Next, these upper mold a and lower mold c
Each of the primary molded products d' and e' is cured using a known vulcanization method, for example, at a temperature of about 150° to 170°, a steam pressure of about 150 Kg/cm ² , and a temperature of about 5 minutes to
When secondary vulcanization is performed for about 7 minutes, a complete vulcanized product is formed in which the primary molded products d' and e', which have not yet been completely vulcanized, are integrally bonded. When the upper mold a is removed from the lower mold a, the molded product remains attached to the lower surface of the upper mold a. Therefore, the molded product may be removed from the upper mold a. In addition, protrusions 21, 21 having a shape corresponding to the recesses or grooves 1, 1 provided at predetermined locations on the lower surface of the upper die a are formed at predetermined portions on the upper surface side of the molded product, so that these protrusions 21, 21 are formed in a predetermined portion on the upper surface side of the molded product. Since it is unnecessary, it should be removed by scraping or other known means.

In this way, relatively small anti-slip protrusions are formed on the ground surface, mainly for jogging, tennis, volleyball, table tennis, etc., which are made of integrally bonded bottom materials of two different types or different colors as shown in the seventh product to It is possible to provide an outer sole or shoe sole suitable for sports shoes having 22, 22.

<Another Embodiment> In addition to the molding die for mainly the outer sole of the shoe sole according to the present invention, in addition to the molding die for the shoe sole shown in FIGS. Type A′ can be mentioned. That is, the mold A' of this embodiment has an upper mold a', a middle mold b', and a lower mold, as shown in FIG.
It consists of c′.

The upper mold a is provided with a plurality of downwardly opening recesses or grooves 11 at predetermined portions on its lower surface side, and each recess or groove 11 has an opening edge 12 smaller than its bottom surface 13.

Next, the medium b' is provided with a spiked shoe sole-shaped recess 14 having a plurality of spike-equivalent recesses 15 at a predetermined portion of the bottom in order to store the initial sole material on its upper surface side. A number of protruding portions 16 are formed at predetermined locations on the lower surface side to press different types or colors of the bottom material stored in the lower die c, and recesses 17 are provided around each of the protruding portions 16. ing. In addition, the lower mold c' has a plurality of shallow recesses 1 at predetermined portions of its bottom in order to accommodate a different type of second bottom material e on its upper surface side.
A spiked sole-shaped recess 18 having a plurality of recesses 20 corresponding to spikes is formed at predetermined portions of the recesses 9 and 19 and the portions where the recesses 19 are not provided.

Next, a method of manufacturing a desired shoe sole or outsole B' using the molded shoe last A' described above is as follows, as shown in FIGS. 6 to V. First, as shown in FIG. 6, a desired amount of the first bottom material d is stored in the recess 14 of the middle mold b', and a desired amount of second bottom materials e and e of different types are placed in the lower mold c'. It is housed in each recess 19 at a predetermined portion of the bottom of the recess 18 .

Next, as shown in FIG. 6, the middle mold b' is stacked on top of the lower mold c', and the upper mold c' is stacked on top of the middle mold b', and then closed. Primary vulcanization is carried out at a temperature and pressure of 1, to form primary molded products d' and e' in which the bottom materials d and e can maintain their desired shapes but are not yet completely vulcanized. Therefore, when the upper mold a' is removed from the middle mold b, the upper mold a has recesses or grooves 11 and 1 at predetermined portions on the lower surface side of the upper mold a, as shown in FIG.
The primary molded product d' of the first bottom material is attached in a state where a part of the primary molded product d' of the first bottom material is fitted inside the first part. Further, when the middle mold b' is removed from the lower mold c', the middle mold b' is filled with different types of material inside the lower mold c' in each recess 17 around each protrusion 16 at a predetermined position on the lower surface side of the middle mold b'. Each primary molding of the second bottom material of
The excess molded part f of e' is pushed in. Therefore, the excess molded portion f may be removed. Furthermore, there is no primary molded product d' within the recess 14 of the medium mold b'. Furthermore, the lower mold c' has a primary molded product e of a different type of second bottom material housed in each recess 19 at a predetermined position within the recess 18 on the upper surface side thereof.
Next, when the lower mold c' is closed with the upper mold a', the primary molded product d' of the upper mold a is fitted into the recesses 20, 20 in the shape corresponding to spikes of the lower mold c'. 1
9 and is housed in the recess 18 so as to come into contact with the secondary molded product e' in the recess 18. Thereafter, secondary vulcanization is performed using a known vulcanization method, for example, at a temperature of about 150° to 170° and a steam pressure of about 150 kg/cm ² for about 4 to 7 minutes. A molded article is formed in which objects d' and e' are inseparably combined. Therefore, when the upper mold a' is removed from the lower mold c',
The upper mold a' is taken out from the upper mold a' with the molded product still attached to its lower surface, and the molded product is removed from the mold a'. Further, at a predetermined portion on the upper surface side of the molded product, a protrusion 21 having a shape corresponding to the recess or groove 11 provided on the lower surface mold of the upper mold a',
21, which is unnecessary as a shoe sole or an outer sole, is removed by scraping or other known means. At this time, if the spike-equivalent shape recess 15 in the recess 14 on the upper surface side of the middle mold b' is made to have a somewhat larger volume than each spike-equivalent shape recess 20 in the recess 18 on the lower surface side of the lower mold c', It is also possible to overcome the defect that it is said that it is difficult to form a complete molded product that extends to the lower end of the spike due to the air pocket formed at the lower end of the spike formed in the conventional simultaneous vulcanization or primary vulcanization. (Especially, this effect is remarkable in the case of relatively tall spikes 22, 22 as shown in FIGS. 8 and 8 according to this embodiment.) It is particularly desirable in the case of a molded article requiring a difference in hardness or a difference in abrasion resistance between the spike 22 and the base 23 to form an integral addition with dissimilar or dissimilar base materials.

The sole B with the spikes 23 shown in FIGS. 8 to 8 manufactured in this way is mainly equipped with relatively tall spikes such as those for soccer, rugby, American football, baseball, softball, etc. It can be provided as something suitable for sports shoes.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic longitudinal cross-sectional views of conventional shoe sole molds. FIG. 3 is a schematic vertical cross-sectional view of a mold mainly for the outer sole according to an embodiment of the present invention.
FIGS. 4 to 4 V are schematic longitudinal cross-sectional views showing the usage states of the mold of the present invention. FIG. 5 is a schematic longitudinal cross-sectional view of a mold for a shoe sole or an outsole according to another embodiment of the present invention. FIGS. 6 to 6 V are schematic vertical cross-sectional views showing the usage state of a mold for a shoe sole or an outsole according to another embodiment of the present invention. FIGS. 7 to 7 are schematic diagrams showing an outer sole mainly manufactured using a mold for the outer sole according to an embodiment of the present invention, in which is a plan view showing the upper surface side thereof, and FIG. 7 is a side view thereof;
FIG. FIG. 8 is a schematic diagram showing a shoe sole or an outsole manufactured using a shoe sole or outsole mold according to another embodiment of the present invention,
is a plan view showing the top side thereof, is a side view thereof, and is a cross-sectional view thereof. <Drawing code>, A, A...Mold, B,
B'...Sole or outer sole, a, a'...Upper model, b,
b'...middle size, c, c'...lower type, 1,11...dent or groove, 2,12...opening edge, 3,13...
Bottom surface, 4, 8, 10, 15, 19, 20... recess, 6, 17... recess, 7... protrusion, 9, 14,
18... recessed part, 16... raised part.

Claims (1)

[Scope of Claims] 1 Consists of an upper mold, a middle mold, and a lower mold, the upper mold having a downward opening at a predetermined portion on its lower surface, the opening edge forming a plurality of recesses or grooves smaller than the bottom surface, and the middle mold having A recess or concave portion that opens upward is formed in a predetermined portion on the upper surface side of the mold to accommodate the first bottom material, and the lower mold also opens upward in a predetermined portion of the upper surface side of the lower mold to accommodate the second bottom material of a different type. A concave portion opened in the lower mold, a middle mold, and an upper mold are sequentially stacked and closed, and the first bottom material in the middle mold and the second bottom material in the lower mold are subjected to primary vulcanization. 1. A mold mainly for an outer sole, characterized in that the upper mold with a primary molded material of sole material can be overlapped with the lower mold, closed, and then subjected to secondary vulcanization. 2. The middle mold is characterized in that a protrusion protrudes downward at a predetermined portion on the lower surface side of the middle mold to partition the useful material and the removed material in the second bottom material of a different type in the recess of the lower mold. A mold for forming the shoe sole according to scope 1, mainly for the outer sole. 3. The medium mold has a plurality of spike-like recesses formed at a predetermined portion within the recess on the upper surface thereof, and a plurality of protruding portions protruding from a predetermined portion of the lower surface thereof to close the recess of the lower mold. A mold for forming a shoe sole, mainly an outer sole, according to claim 1. 4. A shoe sole mainly an outer sole according to claim 3, wherein the lower mold has a plurality of spike-like recesses formed in a predetermined portion of the upper surface side of the recess excluding the recess formation portion. mold.