KR100552799B1 - Mold for shaping midsole or foamed-midsole and manufacturing method of midsole or foamed-midsole using the mold - Google Patents

Abstract

The present invention is a mold for molding a sole or foam shoe sole that can minimize the occurrence of defective products due to poor air by molding or foaming the sole in the state of completely removing the air in the mold during molding or foam molding of the sole and using the same An upper mold (11) comprising a shoe sole or a foamed shoe sole molding method, which can be pressurized by a general heating hydraulic press and includes an exhaust port (13) for discharging air in the mold when combined with the lower mold (21). And pressurizing and heating is possible, and for forming a shoe sole or foam shoe sole comprising a lower mold 21 including a molding space 22 for molding a shoe sole or foam shoe sole by the molding or foam molding of the compound 31 In the metal mold, the bottom surface of the upper mold 11 is projected downward so as to be located outward from the exhaust port 13. And the variable packing 12 is integrally fixed and formed on the upper surface of the lower mold 21 so as to be positioned outside the molding space 22 to accommodate the variable packing 12. The packing insertion groove 23 is formed as an inclined surface in which the groove inner circumferential surface 24 is inclined toward the outside to increase the contact area with the variable packing 12 so as to form a high airtightness. It is characterized by being formed.

Shoe sole, foam shoe sole, heating hydraulic press, direct molding, dumping, heat resistant packing, mold

Description

Mold for molding sole or foam shoe sole and method for molding sole or foam shoe using same {Mold for shaping midsole or foamed-midsole and manufacturing method of midsole or foamed-midsole using the mold}

Figure 1 is a bottom view showing the bottom of the upper mold of the shoe sole or foam shoe sole molding according to the present invention.

Figure 2 is a plan view showing a plane of the lower mold of the shoe sole or foam shoe sole molding according to the present invention.

Figure 3 is a side cross-sectional view showing the mold closing start state in the shoe sole or foam shoe sole forming method according to the present invention.

Figure 4 is a side cross-sectional view showing an exhaust step state in a shoe sole or foam shoe sole forming method according to the present invention.

Figure 5 is a side cross-sectional view showing a molding step state in a shoe sole or foam shoe sole forming method according to the present invention.

FIG. 6 is a side cross-sectional view partially showing FIG. 4.

FIG. 7 is a side cross-sectional view partially showing FIG. 5.

※ Explanation of code for main part of drawing

11: upper mold 12: variable packing

13 exhaust port 21 lower mold

22: forming space 23: packing insertion groove

24: Inner groove 31: Compound

The present invention relates to a mold for molding a shoe sole or foam shoe sole and a method for forming a shoe sole or foam shoe sole using the same. More specifically, the present invention can minimize the occurrence of defective products due to the improvement of the sharpness of the sculpture and the poor air by molding or foaming the sole in the state of completely removing the air in the mold during molding or foam molding of the sole. The present invention relates to a mold for molding a shoe sole or foam shoe sole, and a method for forming a shoe sole or foam shoe sole using the same.

In the manufacture of commercially available shoe soles or foamed shoe soles, a mold is placed in a heated hydraulic press, a compound for sole molding is put into a mold, and then a press is heated and pressed to form a shoe sole or a foamed shoe sole. It is a known technique. In the case of a shoe sole or a foamed shoe sole, the compound is expanded by the volume expansion by heating and molding or foaming the compound for molding the sole, and the shoe sole or foam shoe having the same shape as the molding space and the inner mold by expansion of the compound within the mold space. Is molded into. Therefore, when air remains in the molding space of the deep part of the mold pieces, the compound does not penetrate as much as the volume of air, and a space is formed into the air, which immediately lowers the sharpness of the pieces and becomes discolored, resulting in a defect of the product. Is connected. Therefore, conventionally, the press hot plate is lowered and raised several times in order to discharge air existing in a metal mold | die at the time of shaping | molding. This is called dumping in the workplace. However, even if the dumping operation is repeated several times, the air present in the molding space of the mold does not escape well, and when the product is inspected after the molding operation is completed in a state where the air is not completely removed, Due to the air present in the sole, the molded product is discolored due to the air, or due to the internal air pressure, the compound is not filled to the inside of the piece. It appears in the product in the form of a bridge. This is called air defection in the field. In addition, the press hot plate is lowered, and then slightly open the lid of the inserted mold to remove the air, but the situation has not yet removed the air in a certain way.

Republic of Korea Patent Publication No. 10-217975 (application date March 30, 1993) describes a method for producing a multi-layered molding foam, which is a resin material and a skin material integrally laminated on the surface of the resin body A method of effectively manufacturing a multilayer molded article made up of the present invention, wherein the preheated skin material faces a preheating plate positioned above it toward one of the upper and lower molds, and forms a closed space by the mold and the preheating plate, Although the waste space is evacuated, a method of manufacturing a multilayer molded article is described by supplying a resin and closing the mold closing. However, since the waste space is formed by a preheating plate, the moldings such as the skin material are preheated and foamed. There is a problem that is not appropriate. Korean Patent Laid-Open Publication No. 2001-0007049 (filed May 8, 2000) describes a compression molding machine for manufacturing shoe soles, a method for manufacturing soles, and a control device for compression molding machine, which are not separated into a hot plate and a cold plate. The present invention describes a molding machine and a manufacturing method which can be heated and cooled with a single mold so as to minimize the heat loss inside the apparatus. However, as in the present invention, air defects in the production of shoe soles or foamed shoe soles are described. There is no technique for preventing the back. In addition, the Republic of Korea Utility Model Registration No. 20-0270561 describes a shoe manufacturing machine using a vacuum foam, which describes the input and foam molding of the material by the sliding body moved in the front and rear direction for the material input However, it is difficult to achieve a vacuum in the material supply method by the sliding body, and thus there is no technology for preventing air defects.

In particular, when molding the midsole with a compound containing a foam material such as foam midsole or phylon, direct foaming is impossible due to the air in the mold. In particular, foamed shoe soles incorporating foam material have a large number of defects caused by air, and therefore, production is not possible with the mold structure and operating mechanism of the press machine currently used. Therefore, the midsole is made with expensive special imported foreign machines. The midsole is produced by adopting the dual method of producing the midsole for the midsole with foam or by reprocessing it to produce the foam shoe sole, but in terms of cost, maintenance and productivity There was a problem. Thus, there is still a need for new molds and methods that can produce shoe soles or foamed shoe soles without air defects.

It is an object of the present invention to solve the problem of air inevitably present in a mold when a shoe sole or a foam shoe sole is molded or foamed in a heating hydraulic press, the structure of the mold and the operating structure of the heating hydraulic press machine to use the mold. At the same time, it is possible to prevent product defects caused by air in the molded product without dumping work by the existing press machine, and also to semi-finished products of the foam for shoe sole or foam shoe sole, which is currently used for the production of sole or foam shoe sole. As a 200ton press machine for CMP (Compression Molded Preform) used in production, it provides new molds and methods to directly produce shoe soles or foamed shoe soles like high-priced foreign machines. There is.

Mold for molding shoe sole or foam shoe sole according to the present invention, it is possible to press the pressure by the usual heating hydraulic press, and the upper mold including the exhaust port for discharging the air in the mold when combined with the lower mold can be pressed and heated. In the mold for forming a shoe sole or foam shoe sole comprising a lower mold including a molding space for molding a shoe sole or foam shoe sole by the molding or foam molding of the compound, to protrude downward on the bottom surface of the upper mold The variable packing is integrally fixed to the outside of the exhaust port, and a packing insertion groove is formed on the upper surface of the lower mold so as to be located outside the molding space to accommodate the variable packing. The packing insertion groove is designed to increase the contact area with the variable packing so that The inner circumferential surface of the groove is molded into an inclined surface which is inclined toward the outside so as to form an airtight shape.

A shoe sole or foam shoe sole molding method using a mold for molding a shoe sole or foam shoe sole according to the present invention is capable of pressurization by a conventional heating hydraulic press, and includes an exhaust port for discharging air in the mold when combined with a lower mold. The upper mold may be pressurized and heated, and includes a lower mold including a molding space for molding a shoe sole or foam shoe sole by molding or foam molding of a compound, and protrudes downward on the bottom of the upper mold. The variable packing is integrally fixed to the outside of the exhaust port, and a packing insertion groove is formed on the upper surface of the lower mold so as to be located outside the molding space to accommodate the variable packing. The packing insertion groove increases the contact area with the variable packing so that In the sole or foam shoe sole forming or foam molding using a mold for forming a shoe or foam shoe sole formed or molded into an inclined surface inclined toward the outside to enable the formation of a mill, (1) the molding of the lower mold A compound input step of introducing a compound into a space; (2) a mold closing step of bringing one or both of the upper mold and the lower mold into close proximity to each other; (3) A variable packing fixed to the upper mold is inserted into the packing insertion groove of the lower mold before the upper mold and the lower mold are completely combined with each other so that the groove inner circumferential surface of the packing insertion groove and the variable packing are interviewed with each other. An exhaust step of discharging air in the upper mold and the lower mold through the exhaust port; And (4) a molding step of completely interviewing the upper mold and the lower mold with respect to each other after the air in the mold is completely or sufficiently exhausted in the exhausting step, and molding or foaming the compound in the molding space of the lower mold. Including;

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 1 and 2, the mold for molding a shoe sole or foam shoe sole according to the present invention, it is possible to press the pressure by a conventional heating hydraulic press, the discharge of air in the mold when combined with the lower mold 21 It is possible to pressurize and heat the upper mold 11 including an exhaust port 13 for the molding space 22 for molding or foaming the sole or foam shoe sole by the molding or foam molding of the compound 31 In the mold for forming a shoe sole or foam shoe sole including a lower mold 21, the variable packing 12 so as to protrude downward on the bottom surface of the upper mold 11 so as to be located outside the exhaust port (13). ) Is integrally fixed and is formed on the upper surface of the lower mold 21 so that the packing insertion groove 23 for accommodating the variable packing 12 is further formed to be located outside the molding space 22. The packing insertion groove 23 is formed in an inclined surface inclined toward the outside so that the groove inner circumferential surface 24 can be formed to increase the contact area with the variable packing 12 so as to form a high airtightness. It features.

That is, the mold for molding a shoe sole or foam shoe sole according to the present invention is fixed in the mold for molding a shoe sole or foam shoe sole consisting of the upper mold 11 and the lower mold 21, in particular the variable packing 12 to the upper mold 11 And a packing insertion groove 23 for accommodating the variable packing 12 is formed in the lower mold 21, wherein the packing insertion groove 23 increases the contact area with the variable packing 12. It is characterized in that the grooved inner circumferential surface 24 is formed into an inclined surface which is inclined toward the outside to enable formation of high hermeticity.

With this structure, when the upper mold 11 and the lower mold 21 are combined for molding or foaming, first, the variable packing 12 fixed to the upper mold 11 is packed in the lower mold 21. Inserted into the insertion groove 23, the variable packing 12 is in contact with the inclined surface of the groove inner circumferential surface 24 of the packing insertion groove 23, the upper mold 11 and the lower mold 21 Before this is completely combined, it forms a quarantine space that is primarily separated from the outside. In such a state in which the isolation space is formed, the air in the isolation space can be exhausted by the operation of a normal vacuum pump connected to the exhaust port 13 through an exhaust port 13 formed in the upper space. do. In this case, since the isolation space is separated from the outside by the variable packing 12, the isolation space is in a vacuum state without inflow of air from the outside. Thereafter, the compound 31 injected into the molding space 22 of the lower mold 21 is pressurized by completely coupling the upper mold 11 and the lower mold 21 to each other and is molded or foamed. Since the expansion is limited by the molding, and the limit of expansion is limited to the molding space 22, the compound 31 has the same shape as the inner mold of the molding space 22 of the lower mold 21 or a shoe sole foam Can be obtained. In this case, since the shoe sole or the foam shoe sole as the foamed molding is made in a vacuum state in which the air in the mold is removed, so-called 'air defect' does not occur.

The variable packing 12 protruding downwardly to the bottom of the upper mold 11 has an inclined groove inner circumferential surface 24 of the packing insertion groove 23 upon insertion into the packing insertion groove 23 of the lower mold 21. ) To form a tight hermetic contact with the upper mold (11) and the lower mold 21 to form an isolation space separated from the outside before the complete coupling between the exhaust mold (13) formed in the upper mold (11) It is possible to exhaust through), thereby removing the air in the molding space 22 formed in the lower mold 21 serves to cause the occurrence of the so-called 'air failure'. To this end, the variable packing 12 should be located outside the exhaust port 13 of the upper mold (11). The variable packing 12 is preferably made of a material such as heat-resistant (耐熱) rubber, heat-resistant fluorine rubber or heat-resistant silicone rubber packing (Packing) that can be used for a long time even at high heat, such heat-resistant rubber, heat-resistant fluorine rubber or heat-resistant silicone Packing materials such as rubber are well known to those skilled in the art to be able to purchase and use them commercially.

In addition, the packing insertion groove 23 of the lower mold 21 receives the variable packing 12 and transfers the complete coupling between the upper mold 11 and the lower mold 21 together with the variable packing 12. An isolation space is formed in the outside to allow exhaust through the exhaust port 13 formed in the upper mold 11. The packing insertion groove 23 should be located outside the molding space 22 formed in the lower mold 21.

Although the variable packing 12 has been described as forming the upper mold 11 and the packing insertion groove 23 in the lower mold 21, the variable packing in the upper mold 11 and the lower mold 21 It is easy for those skilled in the art to change the design such as installing the 12 and the packing insertion groove 23 opposite each other and installing the molding space 22 in the upper mold 11 instead of the lower mold 21. It can be understood that it is within the scope of the spirit of the present invention.

In addition, as shown in Figures 3 to 5, the sole or foam shoe molding method using a mold for molding a shoe sole or foam shoe according to the present invention, it is possible to press the pressure by a conventional heating hydraulic press, the lower mold (21) ) And pressurization and heating are possible with the upper mold 11 including the exhaust port 13 for discharging the air in the mold, and the molding of the shoe sole or the foam shoe sole by the molding of the compound 31 or the foam molding. It comprises a lower mold (21) including a molding space for the 22, protruding downward on the bottom of the upper mold 11 to be positioned outside the exhaust port 13 variable packing 12 It is formed integrally fixed, the packing insertion groove 23 for accommodating the variable packing 12 is further formed on the upper surface of the lower mold 21 so as to be located outward than the molding space 22 The packing insertion groove 23 is a shoe sole formed of an inclined surface in which the groove inner circumferential surface 24 is inclined toward the outside to increase the contact area with the variable packing 12 so as to form a high airtightness. In a shoe sole or foam shoe sole molding using a foam shoe sole molding, (1) a compound input step of injecting the compound 31 into the molding space 22 of the lower mold 21; (2) a mold closing start step of bringing one or both of the upper mold 11 or the lower mold 21 into close contact with each other; (3) The variable packing 12 fixed to the upper mold 11 is inserted into the packing insertion groove 23 of the lower mold 21 before the upper mold 11 and the lower mold 21 are completely coupled to each other. Partially inserted to disconnect the space between the upper mold 11 and the lower mold 21 from the outside atmosphere in a state where the groove inner circumferential surface 24 of the packing insertion groove 23 and the variable packing 12 are interviewed with each other. An isolation step of forming an isolation space; (4) an exhausting step of discharging air in an isolation space formed between the upper mold 11 and the lower mold 21 through an exhaust port 13 of the upper mold 11; And (5) after the air in the mold is completely or sufficiently exhausted in the exhausting step, the upper mold 11 and the lower mold 21 are completely interviewed with each other, and the molding space 22 of the lower mold 21 is formed. It characterized in that it comprises a; forming step of molding or foam molding the compound 31 in).

A shoe sole or foam shoe sole molding method using a mold for molding a shoe sole or foam shoe according to the present invention, as shown in detail in Figures 3 to 5 and 6 and 7, can be pressurized by a conventional heating hydraulic press. When combined with the lower mold 21, it is possible to pressurize and heat the upper mold 11, including the exhaust port 13 for discharging the air in the mold, and to the sole by the molding or foam molding of the compound 31 Or it comprises a lower mold 21 including a molding space 22 for the molding of the foam shoe sole, so as to project downward on the bottom surface of the upper mold 11 to be located outside the exhaust port (13). And the variable packing 12 is integrally fixed and formed on the upper surface of the lower mold 21 so as to be positioned outside the molding space 22 to accommodate the variable packing 12. This more The packing insertion groove 23 is formed into an inclined surface in which the groove inner circumferential surface 24 is inclined toward the outside so as to increase the contact area with the variable packing 12 so as to form a high airtightness. After the injection molding shoe sole or foam shoe sole made into a press hot plate (not shown for the sake of simplicity of the drawing) of a conventional heating hydraulic press machine, the method of manufacturing a shoe sole or foam shoe sole according to the present invention is applied.

In the compound input step of (1), the compound 31 as a raw material used to manufacture a shoe sole or a foam shoe sole in the molding space 22 of the lower mold 21 is prepared to prepare a molding or foam molding.

In the mold closing start step (2), one or both of the upper mold 11 and the lower mold 21 are brought into close proximity to each other to close the mold, and the mold is completely closed as described later. Prior to making it a step including stopping at a constant height. This is to achieve a later isolation step, as detailed below.

In the isolation step of (3), before the upper mold 11 and the lower mold 21 are completely coupled to each other, the variable packing 12 fixed to the upper mold 11 is inserted into the packing of the lower mold 21. The space between the upper mold 11 and the lower mold 21 is partially inserted into the groove 23 so that the groove inner circumferential surface 24 of the packing insertion groove 23 and the variable packing 12 are in contact with each other. As a step of forming an isolation space by disconnecting from the outside atmosphere, the inside of the mold is isolated from the outside to facilitate the removal of air therein.

The exhausting step of (4) is a step of discharging air in the isolation space formed between the upper mold 11 and the lower mold 21 through the exhaust port 13 of the upper mold 11. At this time, the exhaust of the air through the exhaust port 13 can be achieved by means such as a conventional vacuum pump, the connection of the normal vacuum pump to the exhaust port 13 and the exhaust by the driving thereof and the like, those skilled in the art It can be understood that it is well known so that it can be easily purchased and performed commercially.

Subsequently, in the forming step of (5), the compound 31 is heated and pressurized by heating and pressurization by driving a hot plate or the like of a conventional heating or hydraulic press in the same or similar manner as in the manufacture of a conventional shoe sole or foamed shoe sole. The compound 31 is expanded within the limit of the molding space 22 in the mold by molding or foaming, thereby forming a shoe sole or foamed shoe sole having the same shape as the molding space 22 and the inner mold. Here, according to the method according to the present invention, after the air in the mold is completely or sufficiently exhausted in the exhausting step, the upper mold 11 and the lower mold 21 are completely interviewed with each other, and the lower mold 21 Since the compound 31 in the molding space 22 of the molding) is molded or foamed, the problem of air defects as in the conventional method can be eliminated as a cause.

Therefore, it is possible to effectively produce a shoe sole or a foam shoe sole without problems such as air defects by the method according to the present invention, without having to manufacture by a complicated process in the production of a shoe sole or foam shoe sole, or expensive equipment.

Therefore, according to the present invention, when molding or foaming molding of the sole, the sole or foamed shoe molding mold that can minimize the generation of defective products due to poor air by molding or foaming the sole in the state that completely removes the air in the mold And by providing a shoe sole or foam shoe sole molding method using the same, there is an effect that can be produced simply and efficiently without shoe sole or foam shoe sole.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (2)

delete It is possible to pressurize by a common heating hydraulic press, and to press and heat the upper mold including the exhaust port for discharging the air in the mold when combined with the lower mold, and to the sole or foam by molding or foaming the compound It comprises a lower mold including a molding space for the molding of the shoe sole, protruding downward on the bottom of the upper mold to be positioned outside the exhaust port, the variable packing is formed integrally fixed, the lower mold The packing insertion groove for receiving the variable packing is further formed on the upper surface of the forming space to the outside of the molding space, the packing insertion groove is to increase the contact area with the variable packing to form a high airtight Shoe made of inclined surface inclined toward the outside to enable the inner circumferential surface of the groove Or in the shoe sole or sole foaming molding using the mold for molding the foamed shoe sole, (1) a compound input step of introducing a compound into the molding space of the lower mold; (2) a mold closing step of bringing one or both of the upper mold and the lower mold into close proximity to each other; (3) A variable packing fixed to the upper mold is inserted into the packing insertion groove of the lower mold before the upper mold and the lower mold are completely combined with each other so that the groove inner circumferential surface of the packing insertion groove and the variable packing are interviewed with each other. An exhaust step of discharging air in the upper mold and the lower mold through the exhaust port; And (4) a molding step of completely interviewing the upper mold and the lower mold with respect to each other after the air in the mold is completely or sufficiently exhausted in the exhausting step, and molding or foaming the compound in the molding space of the lower mold; A shoe sole or foam shoe sole molding method using a mold for molding a shoe sole or foam shoe, characterized in that made.

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