CN106738581B

CN106738581B - Integrally formed sole and manufacturing mold and production method thereof

Info

Publication number: CN106738581B
Application number: CN201611084512.6A
Authority: CN
Inventors: 方柏明
Original assignee: Individual
Current assignee: Dongguan Xinxiang New Material Co.,Ltd.
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2021-02-09
Anticipated expiration: 2036-11-30
Also published as: CN106738581A

Abstract

The invention discloses an integrally formed sole, which comprises a foamed middle sole and a non-foamed large sole, wherein the foamed middle sole is formed by foaming; the middle sole is attached to the outsole and integrally formed with the outsole. The sole is integrally formed in the same die, so that a laminating procedure is not needed, the working procedures are less, and the cost is low; long service life, light specific gravity, good elasticity, excellent shock absorption effect and high wearing comfort. The invention also provides a manufacturing mold of the integrally formed sole, the mold is simultaneously provided with the outsole cavity and the midsole cavity, the one-time casting molding of the sole can be realized, the mold has a simple structure and a reasonable pattern, and the produced sole is attractive in appearance and high in yield. The invention also provides a production method of the integrally formed sole, which has the advantages of low-temperature forming, simple flow, convenient operation, time and labor saving, environmental protection and safety; and the sole with double-color effect can be formed without color spraying operation, the process is simple, and energy conservation and emission reduction are realized.

Description

Integrally formed sole and manufacturing mold and production method thereof

Technical Field

The invention relates to the technical field of shoe manufacturing, in particular to an integrally formed sole, a manufacturing mold and a production method thereof.

Background

The shoes can protect the feet of people well, and particularly, the shoes can reduce or avoid the vibration force generated when people walk or run, and avoid spinal nerves from being injured. The sole generally comprises an outsole and a midsole, the outsole is directly contacted with the ground, and the wear resistance is good; and the insole is arranged on the outsole, so that a good shock absorption effect can be achieved. The sole is closely related to the health of a person, and therefore, the forming structure and the manufacturing method thereof are very important.

In present shoemaking industry, production sole need be through complicated process, including utilizing big end mould production big end respectively, utilize insole mould production insole, then carry out rough treatment to the surface of big end, scribble process water, glue spreader, heating after that, at last with processes such as insole laminating, still include the operation of spouting the look to the sole even, the process is various, greatly increased manufacturing cost. In the process of producing the outsole and the midsole, a large amount of leftover materials are wasted, and corresponding emission and pollution are generated; meanwhile, the processes of coating treatment water, gluing water and spraying color all pollute the environment.

Nowadays, also have put into the insole mould to the big end of production, then pour into the insole material in the insole mould for the fashioned mode of production of foaming on the big end in the insole. However, the production process requires the steps of roughening, coating water and glue, and the like, and the step of independently producing the outsole cannot be omitted, and the operation of fixing the outsole in the midsole mold is increased, which results in a large number of steps. Meanwhile, because the insole material is generally a foaming material, the foaming material is easy to overflow out of the outsole in the insole foaming process, thereby generating defective products.

It is worth mentioning that the production materials of the sole generally include TPU, PU, PVC, TPE, TPR, TR, EVA and the like, except PU materials, other materials are generally difficult to degrade, and can cause great harm to the environment. Therefore, PU materials are of great interest in the field of footwear manufacture.

Nowadays, there is a production method of dual-density PU sole, the outsole and the midsole of the sole are both made of PU material by foaming. The specific operation is as follows: injecting the PU foaming material of the outsole into a mould provided with a color separation plate, removing the color separation plate and spraying glue after foaming and molding the outsole for 10 minutes; then injecting PU middle sole foaming material, heating again to make the middle sole foam and form. In the production process, the outsole foam molding needs to be carried out firstly, then the mould is opened to remove the color separation plate, then the glue is sprayed, and then the insole foam molding is carried out, namely, the foam molding needs to be carried out twice, and the time and the labor are consumed. In addition, if the sole is required to have a two-color effect, the sole needs to be painted. The outsole is formed by foaming, the bottom of the outsole is generally provided with the anti-skidding convex lines, and a large number of bubble gaps are generated at the bottom of the outsole, so that the color spraying effect is not ideal, and the attractiveness of a product is affected.

On the other hand, in order to improve the comfort of the shoe sole, more and more people are engaged in developing a shock-absorbing type shoe sole to improve the shock-absorbing capacity of the shoe sole.

My father, Mr. Fangpeki, filed a patent application in 2008: a mould and method for producing shock-absorbing sole, shoe pad, heel and elastic column with spring (application No. 200810218859.4) features that the spring is arranged in a single foam material. If the product is a foamed insole, although the advantage of good elasticity can be obtained, the insole is not wear-resistant and can be used only by being attached to an outsole; if the product is a foamed outsole, although the product is wear-resistant, the product has no elasticity. Namely, the production method can not simultaneously take account of two points of wear resistance and elasticity, and no matter the product is a middle sole or an outsole, the spring in the middle sole or the outsole can not be seen, so that the product is not beautiful.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an integrally formed sole which is integrally formed in the same mould, does not need a laminating procedure, and has less processes and low cost; the PU material is used for molding, so that the material is degradable, environment-friendly and energy-saving; meanwhile, the wear-resistant fabric is not easy to tear, long in service life, light in specific gravity, good in elasticity, excellent in damping effect and high in wearing comfort.

The second purpose of the invention is to provide a manufacturing mold for integrally molded soles, which is provided with an outsole cavity and a midsole cavity at the same time, can realize one-time casting molding of the soles, and has the advantages of simple structure, reasonable pattern, beautiful appearance of the produced soles and high yield.

The third purpose of the invention is to provide a production method of the integrated sole, which has the advantages of low-temperature forming, simple flow, convenient operation, time and labor saving, environmental protection and safety; and the sole with double-color effect can be formed without color spraying operation, the process is simple, and energy conservation and emission reduction are realized.

The first purpose of the invention is realized by adopting the following technical scheme:

an integrated shoe sole comprises a foamed middle sole and a non-foamed big sole; the middle sole is attached to the outsole and integrally formed with the outsole in a same mould through one-step foaming.

Preferably, the middle sole is formed by PU foaming material; the outsole is formed by PU non-foaming materials.

Preferably, the device further comprises at least one elastic element; the lower part of the elastic piece is arranged in the outsole, and the upper part of the elastic piece is arranged in the midsole; or, further comprises at least one LED lamp; the LED lamp is arranged in the outsole or the midsole.

Preferably, the bottom of the outsole is provided with a plurality of ribs.

Preferably, the outsole and the midsole are both transparent; alternatively, one of them is set to be transparent.

The second purpose of the invention is realized by adopting the following technical scheme:

a manufacturing mold for integrally formed soles comprises a lower mold base and an upper mold cover; the upper part of the lower die base is of an open structure; a cavity is formed in the lower die holder and comprises a first cavity positioned at the lower part of the lower die holder and a second cavity positioned at the upper part of the lower die holder; the first cavity is communicated with the second cavity; the shape of the first cavity is matched with that of the outsole, and the shape of the second cavity is matched with that of the midsole; the upper die cover is connected with the lower die base matching cover box.

Preferably, a material blocking convex ring is arranged in the lower die seat; in the cavity, the material blocking convex ring extends upwards from the bottom wall of the lower die base; spaces are formed between the material blocking convex rings and the side wall of the lower die base, and the material blocking convex rings surround to form the first cavity; or the material blocking convex ring is connected with the side wall of the lower die base to jointly surround to form the first cavity.

Preferably, the device further comprises a movable gland; the movable gland is provided with a feed inlet and a discharge outlet; the movable gland can be matched and covered on the first cavity, and forms a closed cavity with the first cavity; the movable gland is also removable from the first cavity such that the first cavity and the second cavity are in communication.

Preferably, the upper die cover is hinged with the lower die base; a plurality of concave parts are arranged on the bottom wall of the first cavity; the upper die cover is provided with a first handle.

The third purpose of the invention is realized by adopting the following technical scheme:

a production method of an integrally formed sole comprises the following steps:

1) preheating: providing a manufacturing mold of the integrally formed sole, and preheating the manufacturing mold; for example, the manufacturing mold is preheated to 50-60 ℃;

2) injecting materials for the first time: injecting a preset amount of outsole material into the first cavity from the top opening of the lower die holder;

3) injecting materials for the second time: injecting a preset amount of midsole material into the second cavity from the top opening of the lower die holder;

4) shaping: pressing down the upper die cover and closing the die; the outsole material is hardened in the first cavity, the midsole material is foamed in the second cavity, and the outsole and the midsole are integrally formed;

5) shaping: and opening the upper mold cover, taking out the sole, and trimming the redundant leftover materials to obtain the shoe sole.

Preferably, between step 1) and step 2), the following operations are further included: at least one elastic piece is placed in the lower die base; or at least one LED lamp is placed in the lower die base.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the integrally formed sole provided by the invention, the outsole is formed by the non-foaming material, the midsole is formed by the foaming material, the outsole and the midsole are simultaneously and integrally formed in the same die, high-strength bonding can be realized without any treatment between the outsole and the midsole, and the bonding strength is far higher than the manual bonding strength. The outsole does not need to be foamed, bubbles and gaps do not appear at the bottom, hardening of the outsole and foaming of the midsole are carried out simultaneously, forming is good, and quality is excellent. The problems of double production time and complex procedures of the double-density PU and bubbles generated by the big-bottom salient-point anti-slip patterns are solved. The method eliminates the working procedures of producing the outsole mold and independently producing the outsole, does not need the steps of roughening, coating treatment water, coating glue, heating, manual laminating and the like, saves time and labor, and is energy-saving and environment-friendly; the defects that double leftover materials, double energy consumption, double time, double molds and double equipment are generated when the outsole and the midsole are independently produced are avoided. In addition, the invention solves the problem that in the prior art, when the independently produced outsole is placed in the insole foaming mold and insole foaming is carried out, insole foaming materials easily overflow the outsole, so that defective products are caused. The sole of the invention is molded in the same mold, the outsole seamlessly fills the outsole cavity, the insole foams and seamlessly fills the cavities except the outsole cavity, and the outsole and the insole are seamlessly joined without overflowing. Meanwhile, the sole of the invention does not need to be foamed, can be in direct contact with the ground in a wear-resisting way, and has long service life, and the insole is foamed, soft, elastic and good in damping effect.

The applicant has tried the following technical solutions: an open mold without an upper cover, i.e., a non-closed mold without pressure, has been developed, which is suitable for producing a non-foamed, non-pressure-formed product. Only GEL meets such requirements and GEL is an excellent material for producing shock absorbers. However, GEL is easily torn and cannot be used directly in conjunction with other shoe materials. In order to improve the wear resistance of the GEL shock absorber, the manufacture of the bottom plate needs to be increased. When the GEL shock absorber with the bottom plate is used for being attached to a sole, the GEL shock absorber is easy to tear and is difficult to attach. Moreover, the bottom sheet is hard, the GEL shock absorber is soft, a material distribution line between the soft material and the hard material exists between the bottom sheet and the GEL shock absorber, when shock absorption is pressed, the GEL is easy to expand, and the bottom sheet does not expand. Over time, the parting line can form a fracture layer, which can cause quality problems. In addition, the technology can not produce the whole sole in the same mould at the same time, the shock absorber needs to be produced firstly, then the shock absorber needs to be manually attached to the insole, and finally the sole can be formed, so that the process and the cost can not be saved. The insole and the outsole are integrally formed, the insole and the outsole are in seamless joint, the bonding strength is high, the unfoamed outsole is wear-resistant, the unfoamed outsole can be in direct contact with the ground, the foamed insole is soft and elastic, and the shock absorption effect is excellent.

(2) The integrally formed sole provided by the invention has the advantages that the outsole and the midsole are both made of PU materials, the PU materials are degradable, the environment is protected, the forming speed is high, the cost is low, and a plurality of pollution processes are saved. The invention has good popularization prospect, can eliminate high-energy-consumption and high-pollution shoe making methods such as rubber, TPR, TPU, PVC, EVA and the like, and is expected to convert the sole production industry into smokeless enterprises. And the PU foaming material has light specific gravity, so that the prepared sole is lighter, and meanwhile, the elasticity of the PU foaming material is superior to that of GEL, and the damping effect is better.

(3) The integrally formed sole provided by the invention can be provided with the convex patterns at the bottom of the outsole, so that a good anti-skidding effect is achieved. In addition, the big bottom material and the medium bottom material can be prepared into different colors, and the sole can have a double-color effect without color spraying treatment, so that the sole is attractive.

(4) The integrated sole provided by the invention can be filled with the elastic piece, the lower part of the elastic piece is arranged in the outsole, the upper part of the elastic piece is arranged in the midsole, and the elastic piece further improves the damping effect of the sole. If the outsole and/or the middle sole are/is set to be transparent, the elastic part can be seen from the outside of the sole, the outsole is wear-resistant and can be in direct contact with the ground, the foaming insole is soft and elastic, the shock absorption effect is good, and the whole sole is attractive in forming, comfortable and durable. And after the elastic piece is put into the lower die holder, the non-foamed large bottom material is filled firstly, the foamed middle bottom material is filled, the lower part of the spring is positioned by the non-foamed large bottom material, and the displacement cannot occur in the foaming process of the middle bottom. The trouble that an iron column body needs to be additionally arranged to fix the elastic piece when the sole is produced by utilizing the foaming material in the prior art is solved.

(5) The integrally formed sole provided by the invention can be filled with the LED lamp, light is emitted outwards through the transparent shoe material, and the integrally formed sole is good in waterproof performance, water is not easy to permeate into the sole, and the LED lamp is not easy to have a short circuit phenomenon. And traditional sole need through artifical laminating procedure, beat the operation such as thick, scribble processing water and glue spreader, these all can influence the transparency of sole, influence pleasing to the eye, simultaneously, such sole waterproof nature is relatively poor, leads to the LED lamp in it to appear the short circuit phenomenon easily.

(6) The mold for manufacturing the integrally formed sole is provided with the outsole cavity and the midsole cavity simultaneously, can realize one-time casting forming of the sole, and has the advantages of simple structure, reasonable pattern, attractive appearance of the produced sole and high yield.

(7) The invention provides a mold for manufacturing an integrally formed sole, which is provided with a material blocking convex ring. The manufacturing mold with the structure is suitable for producing soles of which the outsole does not completely cover the bottom of the midsole. If keep off the material between the lateral wall of bulge loop and die holder all be formed with the interval, then and the sole after the shaping, the big end can be wrapped up to the bottom edge of its insole, that is to say, sees the shaping sole from the side, can only see the insole. If the material blocking convex ring is connected with the side wall of the lower die base and surrounds to form the first cavity together, the bottom edge of the insole can partially wrap the outsole after the sole is formed. During production, large bottom materials are injected into the large bottom cavity, and the material blocking convex ring can block the large bottom materials from flowing to the middle bottom cavity; then injecting the insole foaming material, closing the mould, and integrally forming the insole and the outsole. Of course, if the material blocking convex ring is not arranged, the outsole completely covers the bottom of the sole after the sole is formed, and the outsole and the midsole can be seen simultaneously when seen from the side surface of the formed sole.

(8) According to the production method of the integrally formed sole, the large sole material and the medium sole material are respectively injected into the same die, the large sole material is hardened, the medium sole material is foamed, and the large sole material and the medium sole material are integrally formed, so that the bonding strength is high, the process is simple, the operation is convenient, and the time and the labor are saved; the molding temperature is low, and the environment is protected and safe; and the sole with double-color effect can be formed without color spraying operation, the process is simple, and energy conservation and emission reduction are realized.

Drawings

FIG. 1 is a side view of an integrally formed sole according to an embodiment of the present invention;

FIG. 2 is a bottom view of an integrally formed sole according to an embodiment of the present invention;

FIG. 3 is a bottom view of an integrally formed sole according to yet another embodiment of the present invention;

FIG. 4 is a schematic view of a mold for making an integrally formed sole according to an embodiment of the present invention;

FIG. 5 is a schematic view of the mold for making an integrally formed sole and the movable gland of the present invention;

in the figure: 10. a midsole; 20. a outsole; 30. an elastic member; 40. a lower die holder; 41. putting a mold cover; 42. a first cavity; 43. a second cavity; 44. a first handle; 50. a movable gland; 51. a feed inlet; 52. a discharge port; 53. a second handle.

Detailed Description

The invention will be further described with reference to the accompanying drawings and the detailed description below:

as shown in fig. 1-2, an embodiment of the present invention provides an integrally formed shoe sole, including a foamed midsole 10 and a non-foamed outsole 20; the middle sole 10 is attached to the outsole 20 and integrally formed with the outsole 20 by one-time foaming in the same mold.

More specifically, the midsole 10 is molded from a PU foam material; the outsole 20 is molded from a PU non-foamed material. The PU non-foaming material is a liquid material, has physical properties close to those of rubber, and can be purchased from BASF (China) Co., Ltd, and the model is POLY. The PU material is degradable and environment-friendly. Meanwhile, the outsole 20 and the midsole 10 can be transparent, or the outsole 20 and the midsole 10 can be made of materials with the same or different colors, so that the sole is colored, and the appearance is improved; particularly, if the color of the outsole 20 is different from that of the midsole 10, the whole sole has a two-color effect, and has a lingering charm.

As shown in fig. 1, in order to improve the shock-absorbing effect of the sole, the integrally formed sole further includes at least one elastic member 30; the lower part of the elastic element 30 is arranged in the outsole 20, and the upper part is arranged in the midsole 10; for example, the number of the elastic members 30 is two, and the two elastic members are respectively referred to as a first elastic member and a second elastic member; the lower parts of the first elastic element and the second elastic element are arranged in the outsole 20, and the upper parts of the first elastic element and the second elastic element are arranged in the midsole 10; and the first elastic piece corresponds to the position of the heel stress point, and the second elastic piece corresponds to the position of the forefoot stress point. In addition, the elastic member 30 may be provided as a spring. In order to make the shoe sole more aesthetic, the outsole 20 and the midsole 10 may be provided in a transparent structure so that the elastic members 30 provided therein can be seen from the outside of the shoe sole. In addition, a paint layer may be coated on the outer surface of the elastic member 30; the coating layer can be one or any combination of a white coating layer, a black coating layer, a silver coating layer, a gold coating layer, a red coating layer, a fluorescent yellow coating layer, a green coating layer, an orange coating layer, a purple coating layer and a blue coating layer, and of course, coating layers of other colors can also be arranged. Alternatively, a rubber sleeve may be sleeved on the elastic member 30, and the color of the rubber sleeve may be set to different colors according to the preference of the user. That is, the elastic member 30 can be covered by colorful paint layer or rubber sleeve, so as to further enhance the aesthetic property of the sole.

In addition, in order to increase the interest and beauty of the sole, the integrated sole can also comprise at least one LED lamp (not shown in the figure); the LED lamp is arranged in the outsole 20 or the midsole 10. When such an arrangement is employed, outsole 20 and/or midsole 10 is preferably provided in a transparent configuration, with the power cord of the LED lamp extending out of the sole and connecting to batteries and switches provided on other portions of the footwear body (e.g., the upper). When the switch is turned on, the light emitted by the LED can be emitted outwards through the transparent shoe material, so that the interest and the appearance are enhanced. If the LED lamp can emit light with a plurality of different colors, the LED lamp is more colorful and attractive.

As shown in fig. 2-3, the bottom of outsole 20 is provided with a plurality of ribs in order to improve the anti-slip properties of the sole. A plurality of the burr can set up these wales including vertical sand grip, horizontal sand grip, slant sand grip, triangle-shaped arch and some dot-like bumps etc. can increase the non-skid property of big end.

As shown in fig. 4-5, an embodiment of the present invention further provides a mold for making an integrally formed sole, including a lower mold base 40 and an upper mold cover 41; the upper part of the lower die holder 40 is of an open structure; cavities are formed in the lower die holder 40 and comprise a first cavity 42 positioned at the lower part of the lower die holder 40 and a second cavity 43 positioned at the upper part of the lower die holder 40; the first cavity 42 is communicated with the second cavity 43; the shape of the first cavity 42 matches the shape of the outsole 20, and the shape of the second cavity 43 matches the shape of the midsole 10; the upper die cover 41 is connected with the lower die holder 40 matching with the cover box.

In addition, a material blocking convex ring (not shown in the figure) can be arranged in the lower die holder 40; in the cavity, the material blocking convex ring extends upwards from the bottom wall of the lower die holder 40, and a space is formed between the material blocking convex ring and the side wall of the lower die holder 40; the material blocking convex ring surrounds to form a first cavity 42. And the space above the space, the space above the space and the space above the first cavity 42, which together form a second cavity 43; that is, in the cavity of the lower die holder 40, the second cavity 43 is formed except for the first cavity 42. The mold for making the structure is suitable for producing a sole in which the outsole 20 does not completely cover the bottom of the midsole 10, as shown in fig. 3, and the molded sole in which the edge of the outsole 10 wraps the outsole 20, that is, the molded sole is seen from the side, only the midsole 10 is seen, but not the outsole 20 is seen. In the embodiment shown in fig. 3, the material blocking convex ring is a regular ring matched with the bottom shape of the sole. However, the arrangement mode of the material blocking convex ring is not limited to the above mode, and other arrangement modes can be adopted. For example, the material blocking convex ring is formed by connecting a plurality of small convex rings. Specifically, a material blocking convex ring can be respectively arranged at the front sole position and the heel position, but the two convex rings are communicated, namely at least two convex strips are arranged at the arch position, and a flow channel is formed between the two convex strips and enables the two convex rings to be communicated with each other. Of course, other numbers of convex rings can be arranged, for example, 3, 4, 5, 6 and the like, and a plurality of material blocking convex rings are mutually communicated through material blocking convex strips. The space surrounded by the material blocking convex ring and the convex strip forms a first cavity, namely a big sole cavity, and the rest of the space in the lower die holder except the space of the big sole cavity is the middle sole cavity.

More specifically, the upper die cover 41 is hinged with the lower die holder 40, and the arrangement mode is simple and convenient and has low cost; moreover, the bottom wall of the first cavity 42 is provided with a plurality of recesses, and the existence of the recesses enables the bottom of the formed outsole 20 to present a matched convex pattern; in addition, the upper mold cover 41 is provided with a first handle 44, and the first handle 44 facilitates opening and closing of the mold.

When the sole 20 is produced by using the mold alone, or the inclination difference between the front palm part and the rear root part of the sole 20 is large. The mold may further include a movable gland 50; the movable gland 50 is provided with a feed inlet 51 and a discharge outlet 52; the movable gland 50 can be matched and covered on the first cavity 42 and forms a closed cavity with the first cavity 42; the movable gland 50 can also be removed from the first cavity 42 so that the first cavity 42 and the second cavity 43 are in communication. In addition, a second handle 53 may be provided on the movable cover 50 for the convenience of using the movable cover 50.

In the actual production process, the heel part of the sole is generally thicker, and the position corresponding to the forefoot (especially the toes) is generally arranged in a manner that the point is inclined upwards. That is, the horizontal plane of the front portion of the first cavity 42 at the bottom of the lower mold base 40 is higher than the horizontal plane of the rear portion, so that during material injection, the material liquid easily flows from a high position to a low position, which may cause the phenomena of shortage of the material in the front sole of the outsole 20 and excessive material liquid in the rear sole. In this case, a plurality of recesses (including grooves and/or pits) may be formed in the bottom wall of the outsole cavity. When the outsole is produced, the material is separated from the front part of the outsole cavity, the material liquid can fill the concave part of the front part firstly and then flows to the heel part at the low position, so that the whole outsole cavity is filled with the outsole material, the phenomenon of material shortage of the high-position cavity is avoided, and the outsole with good quality can be obtained. At the same time, the bottom of the formed outsole presents raised grains matched with the concave parts due to the function of the concave parts, and the raised grains can increase the antiskid performance of the outsole. In addition, for some styles of footwear, the outsole cavities are made up of several parts that are preferably designed to communicate with each other for ease of filling. Due to the arrangement, the large bottom materials can circulate in the communicated large bottom cavities only by injecting the large bottom materials once, so that the whole large bottom cavities are filled; the trouble that the materials need to be injected for many times is avoided, and time and labor are saved. That is to say, in the lower die holder, the material blocking convex ring is not a regular ring completely matched with the bottom shape of the sole, but is formed by connecting a plurality of convex rings. For example, the two convex rings are connected, namely at least two convex strips are arranged on the arch position, and a flow passage is formed between the two convex strips, so that the two convex rings are mutually connected. Of course, also can set up the bulge loop of other quantity, a plurality of bulge loops are according to the artifical mechanics rational distribution, great at the stress point, promptly with the great position that corresponds of ground friction, should set up and keep off the material bulge loop, communicate each other through keeping off the material sand grip between a plurality of fender bulge loops, ensure to once only accomplish to annotate material easy operation. After the big bottom cavity is filled with the big bottom material, the left space is the cavity of the insole foaming material, the insole cavity can be completely filled with the insole material, the boundary between the insole and the big bottom is not obvious, and the insole and the big bottom are in seamless joint. Simultaneously, big end material and well bed charge take place chemical reaction simultaneously in the mould, and big end material hardens, and well bed charge foams and fills the die cavity outside the big end completely, closely laminates between the molecule of big end and insole and the molecule, and the joint strength is high, is higher than traditional artifical joint strength far away.

It should be noted that, in practical production, when the difference between the inclination of the front sole part and the inclination of the heel part of the outsole is greater than 20 ° (for example, the forefront of the running shoe outsole is tilted up by 90 °), the concave part of the outsole cavity is difficult to block the outsole, and the phenomenon of material shortage of the high-level cavity still occurs. At this point we can use a movable gland to solve this problem. A feed inlet and a discharge outlet are arranged on the movable gland; the movable pressing cover can be matched and covered on the first cavity, and a closed cavity is formed by the movable pressing cover and the first cavity. When in production, large bed charge is injected from the feed inlet of the movable gland until a little large bed charge is discharged from the discharge outlet of the movable gland. After 1-2min, the outsole can be in a semi-hardened state. Then, the movable gland is removed, the foaming PU is injected, the upper mold cover is closed, and the insole is foamed and integrally formed with the hardened outsole. Although the production mode increases the procedure of operating the movable gland, the hardening of the outsole needs to be finished firstly, then the foaming of the insole needs to be carried out, and the working procedure and the time are increased compared with the process of simultaneously hardening the outsole and foaming the insole, but compared with the traditional production method of the dual-density PU sole, the production speed is greatly improved. Because the traditional double-density PU sole needs to be foamed twice, and one-time foaming is about 10min, which takes about 20 min; the method takes about 1-2min for hardening once, about 10min for foaming once and 11-12min for total time. In addition, in the production process of the traditional dual-density PU sole, the operations of rough treatment, treatment water coating and glue coating are required, but the method is not required, so that the cost is reduced, and the method is energy-saving and environment-friendly. In addition, the outsole of the invention does not need to be foamed, and is not easy to generate gaps and bubbles like a dual-density PU sole. Although the method is also used for separately producing the outsole and the midsole, the finally formed sole has high excellent rate and the phenomenon that the midsole foaming material overflows to the outsole does not occur because the outsole does not need to move after being hardened in the production process, the outsole can be closely and seamlessly jointed with the die cavity and the midsole, and the outsole material and the midsole material respectively occupy the positions and do not overflow.

Of course, the mold can also be used only for producing soles. At this time, the movable gland can be matched and covered on the top of the first cavity, and the movable gland and the first cavity form a closed cavity. And injecting large bed charge from the feed inlet of the movable gland until a little of the large bed charge is discharged from the discharge outlet of the movable gland. After 1-2min, the outsole can be hardened. And then, removing the movable gland and taking out the outsole to obtain the shoe sole. PU can be made into a large sole without hardening of foaming materials, no leftover materials can be generated, and the forming speed is high. If the production of a flat negative plate is not required together with the movement of the gland, the yield of a single person is improved by dozens of times of that of the rubber negative plate and the cost can be reduced by dozens of times as long as the material is injected into the open type cavity (namely, as long as the lower die base does not use the upper die cover and the gland). The traditional process for producing the outsole by using rubber needs conditions of high temperature and high pressure, and the production time is longer and is at least 10 times of the time consumed by the method. The invention adopts PU non-foaming material to produce outsole, the physical property of the outsole is close to that of rubber, but the production time is greatly reduced, the emission is very low, and no leftover material is generated. The invention has good popularization prospect, can eliminate high-energy-consumption and high-pollution shoe sole manufacturing methods such as rubber, TPR, TPU, PVC, EVA and the like, and is expected to convert the shoe sole production industry into smokeless enterprises.

The embodiment of the invention also provides a production method of the integrally formed sole, which comprises the following steps:

1) preheating: providing a manufacturing mold of the integrally formed sole, and preheating the manufacturing mold to 50-60 ℃;

Of course, feed solution preparation is required before preheating. On the traditional PU foaming production line, a GEL perfusion glue dripping machine is additionally arranged, and a material A and a material B which form a large bottom material are respectively added into a material A cylinder and a material B cylinder of the GEL glue dripping machine. The method for producing the sole with the combination of the middle sole and the big sole has simple working procedures, and only combines the glue dripping process for producing GEL to a PU production line; however, the simple change seems to have revolutionary significance for the sole manufacturing process.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.

Claims

1. An integrally formed sole is characterized by comprising a foamed middle sole, a non-foamed big sole, a lower die holder and an upper die cover; the middle sole is attached to the outsole and integrally formed with the outsole; the upper part of the lower die base is of an open structure; a cavity is formed in the lower die holder and comprises a first cavity positioned at the lower part of the lower die holder and a second cavity positioned at the upper part of the lower die holder; the first cavity is communicated with the second cavity; the shape of the first cavity is matched with that of the outsole, and the shape of the second cavity is matched with that of the midsole; the upper die cover is connected with the lower die base matching cover box; wherein, the middle sole is formed by PU foaming material; the outsole is formed by PU non-foaming material; a material blocking convex ring is arranged in the lower die seat; in the cavity, the material blocking convex ring extends upwards from the bottom wall of the lower die base; spaces are formed between the material blocking convex rings and the side wall of the lower die base, and the material blocking convex rings surround to form the first cavity; or the material blocking convex ring is connected with the side wall of the lower die base to jointly surround to form the first cavity;

a production method of an integrally formed sole comprises the following steps:

1) preheating: preheating a manufacturing mold;

2. The integrally formed sole of claim 1, further comprising at least one resilient member; the lower part of the elastic piece is arranged in the outsole, and the upper part of the elastic piece is arranged in the midsole; or, further comprises at least one LED lamp; the LED lamp is arranged in the outsole or the midsole.

3. The integrally formed shoe sole according to claim 1, wherein the bottom of the outsole is provided with a plurality of ribs.

4. The integrally formed shoe sole according to claim 1, wherein both the outsole and the midsole are provided to be transparent; alternatively, one of them is set to be transparent.

5. The integrally formed shoe sole according to claim 1, further comprising, between step 1) and step 2), the following operations: at least one elastic piece is placed in the lower die base; or at least one LED lamp is placed in the lower die base.

6. The integrally formed sole according to claim 1, further comprising a movable gland; the movable gland is provided with a feed inlet and a discharge outlet; the movable gland can be matched and covered on the first cavity, and forms a closed cavity with the first cavity; the movable gland is also removable from the first cavity such that the first cavity and the second cavity are in communication.

7. The integrated sole according to claim 1, wherein the upper mold cover is hinged to the lower mold base; a plurality of concave parts are arranged on the bottom wall of the first cavity; the upper die cover is provided with a first handle.