JPS5849243B2 - Shoe molding machine with molded soles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a molding machine for producing shoes with molded shoes of multiple colors or layers of sole material, such as rubber or synthetic resin.

Conventional molding that supplies molding materials such as two colors or two or more types of rubber or synthetic resin, and manufactures shoes with injection-type soles that are laminated with two colors or two or more types and have an uneven design surface on the bottom surface. According to the machine, a shoe last covered with an instep and suspended, a side frame mold that opens left and right, a bottom mold that moves up and down and has a design surface that forms the design surface of the sole on the top surface, and an upper surface of the sole mold. Using an injection molding machine consisting of a lid plate that covers the side design surface, an initial space is formed by the bottom mold whose uneven surface on the top side is covered with the lid plate, the side frame mold, and the shoe last, and the mold is filled in the space. The first molding material is extruded and pressed to form the first molded object, that is, the base of the sole connected to the bottom side of the upper of the shoe, and then the sole mold is lowered once and the lid is removed from the bottom mold. The plate is removed, and a molding material of a different type or color is extruded and pressed into the space formed by the bottom mold from which the lid plate has been removed, the certain mold, the side frame mold, etc., and the next molded product, that is, the bottom of the shoe, is molded for the first time. Shoes were manufactured with injection-molded soles attached to the base.

However, when these shoes are manufactured using a conventional molding machine, the first sole material is used to mold the first molded product, that is, the base part that is connected to the bottom side of the upper part of the shoe, but the above-mentioned parts are formed within the irregularities of the design surface of the sole. By covering the designed surface of the bottom mold with a cover plate to prevent the bottom material from entering, the bottom material that has entered into the unevenness of the designed surface and the cost of using the bottom material equal to the thickness of the covering plate can be saved and the thickness can be reduced. As a result, the cost of the shoes can be reduced and shoes with good lightness can be obtained.

However, as shown in FIG. 6, shoes with the above-mentioned molded soles may be molded with the same color or the same kind of material on the bottom side, or may be molded with the same type of different color or different kind of material. The base part and the bottom part are simply connected one above the other, so that, for example, in areas prone to wear, a shaped part made of a bottom material that is hard or has good wear resistance, and a part that does not wear or bend relatively easily. With a bottom material that is relatively soft or less abrasion resistant in areas where it is more susceptible to slipping, it is not possible to provide the bottom material in such a way that the shaped part can be provided in areas that require more flexibility, and therefore slip. Not only is it impossible to manufacture athletic shoes with soles with fasteners, but there are also defects in that multiple layers of the same type, different colors, or different types are simply connected one above the other, and the bonding force is not sufficient.

The molding machine for producing the shoes of the present invention is an improvement on the conventional injection molding machine that supplies and molds sole materials of two colors or two or more types of rubber or synthetic resin, and is used in areas that are prone to wear. A molded part that is hard or has good wear resistance, and a molded part that is made of a bottom material that is relatively soft or has low wear resistance for parts that do not wear or are easily bent, and parts that are particularly easy to wear or that are non-slip. In places where poor flexibility is required in order to attach a tool, a bottom material with this function is supplied into a space formed to have a capacity to accommodate it and pressed to achieve the desired command. These functions are provided in places other than the molded part that require easy bending according to the movement of the foot, or places that do not come into contact with the ground and do not require wear resistance. A shoe with a molded sole is manufactured by forming a sole material with a capacity that can supply the material, feeding it into the space and pressing it to integrally bond and mold the desired molded product to the molded material. A molding machine that molds both molded products by fitting them into a bottom mold of a dummy last with a large number of small dents on the bottom side and a large number of small dents on the top side. The ground bottom part, which has a protruding piece of the molded part that has a poor surface area, and the molded part above it, which does not require flexibility or wear resistance, are firmly connected, so not only does the bonding strength is extremely good. It is possible to provide a molding machine capable of producing a shoe with a very good appearance and high added value, in which two different colored or different types of molded products are expressed with clear boundaries on the contact surface side of the molded shoe sole.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A shoe molding machine having a molded sole according to the present invention will be described below with reference to the drawings.

As shown in Figure 1, a dummy last A consists of a shoe last a covered with a shoe upper and suspended, a lid b having many small indentations 1 and 1 on the bottom side, and a dummy last A that opens and closes by moving left and right. side frame molds c and c, a bottom mold d which moves vertically and is provided with recessed parts 2, 2 into which a fitting member to be described later is fitted mainly in a part of the side corresponding to the front part on the upper surface side and in the part corresponding to the heel; As shown in Fig. 2 I to ■, the recessed part 2 on the upper surface side of the bottom mold d,
2, and there are many small recesses 3 on the top side.
A plurality of fitting parts e, e', etc. provided with 3 constitute a command forming machine.

Next, the method of using the molding machine of the present invention will be explained according to the drawings. As shown in FIG. An initial space 4 is formed between the fitting part e and the bottom mold d fitted into the recess 2, and the first bottom material is supplied into the space 4 from the upper supply port 6 to form the bottom. By pressing with mold b to cause vulcanization or reaction, the base opening of the first molded product, that is, the molded sole, is bonded and molded to the bottom side of upper part 2 of shoe mold a.

Next, as shown in Fig. 3 (■), the left and right side frame molds c, c of the dummy lath t-A are moved left and right to lower the open bottom mold d, and each fitting part e is removed from the bottom mold d. , e are removed, the left and right side frame molds c and c are closed, and the sole mold d is raised, and the base opening of the molded sole on the bottom side of the upper part 2 of these shoe lasts a and the left and right side frame molds c, The next bottom material is supplied from the lower supply port 7 into the next space 5 between c and the bottom mold d, and is pressed and vulcanized or reacted to form the next preform, that is, the ground surface part a. shoe last a
It is integrally connected to the first molding on the bottom side of the upper part 2, that is, the base opening.

Shoes B having a molded sole C can be manufactured.

In addition, the fitting parts e' shown in Fig. 2 I and ■
In addition to one fitted part e having a plurality of protrusions 8, 8 which are uniformly fitted into the recessed part 2 of the bottom mold d, there is also a bottom mold as shown in Fig. 2 ■ and ■. Each concave part 2 and 2 of d
A plurality of fitting parts e/, which are fitted into each
e' can be used.

In addition, the recesses 2 provided on the upper surface side of the sole mold d are formed in a plurality of recesses or in a shallow part and a deep part so as to match the bottom shape, that is, the design surface of the contact surface part A of the molded sole C of the shoe B equipped with the molded sole. Alternatively, it is desirable to form an appropriate shape such as only one piece in which both of these parts are connected.

A molding machine including a dummy last A according to the present invention is shown in FIG.
As shown by () to (), an initial space 5 is formed between the lid mold b of the dummy lath t-A of the certain forming machine, the left and right side frame molds c, c, and the bottom mold d, and the inside of the space 5 is The first sole material is supplied from the lower supply port 7 and is pressed by the sole mold d to be vulcanized or reacted, and the first molded product, that is, the contact surface part i of the molded sole is molded on the sole mold C.

Next, the left and right side frame molds C and C are moved left and right, respectively, to open the left and right side frame molds C and C, and the dummy last is rotated to exchange the positions of the lid mold b and the shoe last a. In place of the lid mold b, a shoe mold a with upper part 2 with upper part 2 hung thereon is placed to form the next space 4, and in this space 4, the lower injection supply port 7 is formed. A sole material of the same kind, different color, or different type from the first sole material is supplied from another upper supply port 6, and it is pressed and vulcanized or reacted, and the base opening of the next formed object, that is, the molded sole, is formed into a shoe. It is possible to mold a shoe b having a molded sole C formed by integrally joining the bottom side of the upper part 2 of mold a and the ground contact surface part 1 which is the first molded product.

Thereafter, the left and right side frame molds c and c are moved left and right, the open sole mold d is lowered, and the shoe last a is rotated, so that the shoe D with the molded sole C can be removed from the shoe last a.

Shoes B manufactured by the molding machine according to the present invention are shown in FIG.
As shown in , the molded sole C of the shoe B has its contact surface A and the base opening integrally connected, and a large number of small protrusions E and E bite into the base opening from the contact surface A and are connected. Because of this, the joint area between the ground plane part A and the base opening is large, and therefore the joint is strong.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a dummy last of a molding machine for manufacturing shoes of the present invention. FIGS. 2I to 2 are examples of schematic diagrams of the slopes of fitting members that are fitted into the recesses on the upper surface side of the bottom mold, and 2 is a schematic plan view showing the upper surface side of one fitting part. Similarly, the bottom side is shown, and ■ is the top side of the fitting component made up of a plurality of pieces, and ■ is a schematic cross-sectional view thereof. FIGS. 3-3 are schematic diagrams showing the first embodiment;
is a cross-sectional diagram of the main part of the molding machine that formed the first space, ■ is a cross-sectional diagram of the main part of the molding machine including the state in which the first molded product is formed, and ■ is a cross-sectional diagram of the main part of the molding machine that formed the first space. 2 is a schematic cross-sectional view of the main part of the molding machine that molded the molding machine, and (2) is a schematic cross-sectional view of the main part of the molding machine including the state in which the next molded product is combined with a molded shoe sole. Figures 4 I to (■) are schematic diagrams showing other embodiments, where (■) is a cross-sectional schematic diagram of the main part of the molding machine that formed the initial space, and (■) is a state in which the first molded product is molded. ■ is a schematic cross-sectional view of the main part of the molding machine that molded the next space, ■ is a cross-sectional diagram of the main part of the molding machine that molded the next space, and ■ is a molded shoe sole that combines the following molded products. FIG. 3 is a schematic cross-sectional view of the main parts of the molding machine, including its state. FIGS. 5I to 5 are partially enlarged cross-sectional schematic diagrams of shoes equipped with a plurality of layers of the same type and different colors or different types of soles; This shows that. FIG. 6 shows a shoe manufactured using a conventional molding machine. Drawing code, A...Dummy last, B...
...Shoes, a... Shoe last, b... Lid shape, c
, c... Side frame type, e, e'... Fitting parts, 1, 3... Recess, 2... Recessed part, 4 and 5. ...Space section, 6,7...
Supply port, 8, 8'... Convex part, A... Ground contact area, Mouth... Base part, C... Molded shoe sole, 2...・・・・・・Vapor part, Ho, He...Protrusion.

Claims (1)

[Claims] 1. A dummy last that can be rotated to alternately change its position up and down by combining a shoe last with a suspended upper covering and a lid last, a side frame mold that opens left and right, and a side frame that moves up and down and forms the bottom surface of the sole. In an injection molding machine comprising a bottom mold, a large number of small recesses 1 are provided on the bottom side of the lid mold b of the dummy last A, and a large number of small recesses 1 are formed on the top side of the bottom mold d, mainly a part of the part corresponding to the front stepping and the part corresponding to the heel. The dummy last A is made up of a plurality of fitting parts e, e, which are provided with a recessed part 2 in the upper surface of the separate member, and have a large number of small recesses 3 in the upper surface side of the other member, and are fitted into the recessed part 2 of the bottom mold d. The first bottom material is supplied into the first space 4 between the lid mold b, the left and right side frame molds c, c, and the bottom mold d, and this is pressed by the bottom mold d to form the first molded product. The dummy last A is rotated to exchange the positions of the lid mold b and the shoe last a, and the first molded product on the shoe last a, the left and right side frame molds c, c, and the sole mold d is placed in the space 5. A shoe molding machine equipped with a molded sole, which can supply sole materials of the same type, different color, or different types and press them to integrally mold the molded product and the initial molded product.