TW585749B - Shoe sole formed by single foaming process and having different hardness, method and mold for producing the same - Google Patents

Abstract

A method for producing a shoe sole having different hardness by a single foaming process comprises: preparing at least two chemical materials with different hardness; blending the chemical materials into two chemical compositions with different hardness; separately rolling the two chemical compositions into thin sheets; separately cutting the sheets of the two chemical compositions into sheets of material with a high hardness and sheets of material with a low hardness; stacking a plurality of sheets with a high hardness into a primary body, the top of the primary body having a recessed space; preparing a suitable amount of sheets with a low hardness into the recessed space to form a to-be-foamed body; and mounting the to-be-foamed body into a mold cavity to be foamed into a shoe sole, in which the chemical compositions with different hardness enable the shoesole having regions with different hardness.

Description

V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a foam-molded shoe sole with different soft hardness parts; and the shoe does not cause environmental pollution. -< Ik process [Previous technique] Press, the current EVA foam sole, its various parts? ^. ^ ^ ^ 4ΓΛ heavy action. As the conventional foam sole is a single object, it can provide better protection, but it is difficult to take care of its functions because it is detrimental to wearing. "Sex is more important." Known EVA foam soles in the manufacturing process produce waste materials that cannot be recycled, and corners. In addition, the special-leg foam soles are of a single color. , So less beautiful. The color of the human soil [Inventive content] The present invention aims to solve the above-mentioned pure & & >% foam molding soles. With different soft hardness bottoms can be :: ;;; :: to provide-a kind of foam molding soles, the shoe, and ^-again-the purpose is to provide a hair, which can recycle the cut waste material, not Will pollute the environment: the fifth method of the invention (2) [Embodiment] and the achieved effect entrusted; further understanding of the purpose, features and drawings of the present invention are described in detail in the present invention-best practice For example, the arrangement of the second figure in the second figure is as follows:: A picture is a thin sheet that is cut and rolled. ϊThe second line is the overlapping relationship of high and low hardness sheets. The second sheet of Di Simin is a three-dimensional view of a foam to be stacked. The fifth figure shows a lower mold of a mold according to a preferred embodiment of the present invention. , Figure 6 is a sectional view of the mold clamping and vacuuming. The seventh figure is a state in which the mold of the sixth figure is completely closed. The eighth figure is a perspective view of a foamed sole. The ninth figure is a sectional view of the eighth figure. The manufacturing method of the foamed sole provided by the present invention is to make the manufactured sole have different soft hardness at different positions and can be made into multiple colors. The manufacturing method of the present invention includes the following steps: 1. Kneading a plurality of chemical materials into two compositions with different softness: First, a plurality of chemical materials are mixed and kneaded to form two chemical compositions with different soft hardness. The chemical materials used in this embodiment include: EVA (PE 'polyethylene); EPDM (ethylene propylene diene methylene, a copolymer of ethylene and propylene), which is an artificial rubber, And a chemical called ENG AGE in the industry (the same product of acetylene is a new product developed by DuPont in recent years, and the official scientific name has not yet been found), the above-mentioned granular material is kneaded

585749 V. Description of the invention (3) Compatible: (kneading machine) mixed with Mixia # material is densely mixed into low hardness and high hardness; tan sandalwood: = This invention is based on the above, the hardness and hardness of the high hardness composition Degree of composition. ^ ENGAGE 24: 3; \ tnM ;: 29 ^ Foaming agent, filler, bridging agent =: coffee: 4 ~ 10%, the rest are all kinds of processing aids. The low-hardness composition S i: differs from the high-hardness composition ㈣, the difference is in the ratio of the two components; for example, if the weight percentage of GE is increased, such as the rhyme, and the content of ethylene is decreased, for example, 7 to 15% However, the difference between low hardness components and I ^^ is limited to this. The hardness composition in the present invention is a relative relationship. In terms of the physical properties of EVA and polyethylene, the hardness of E is the lowest (that is, the most magical and the hardness of polyethylene is the highest). The soft hardness of m is in the middle. For the composition ratio of "high hardness composition", if the content of polyethylene is appropriately increased and reduced, it will become "low hardness composition 2." It must also be stated that ' In practice, the two compositions do not need to have ENGAGE. They can be composed of EVA, polyethylene, and EpDMA processing aids. When the weight percentage of polyethylene is high, it becomes a high hardness composition; When it is low, it is a low-hardness composition. Also, when the two chemical compositions are mixed, a colorant may be added so that the one composition after the mixing forms a different color. Second, the two chemical compositions are rolled and cut separately. Cut into thin slices: After the above two compositions have been condensed, they are rolled, cooled, and cut into a large number of slices (丨 0) by a roller and a sheet extruder, as shown in the second figure. In the embodiment, ， The thickness of each sheet is about I 5 ~ 2. 0mm .

585749 V. Description of the invention (4) 3. Cut the two sheets of the chemical composition into a high-hardness sheet and a low-hardness sheet: After the above steps, the two compositions can be made into a plurality of sheets, respectively. Then, the sheets (1 0) compounded with the two compositions are cut into original shoe-like sheets, and most high-hardness sheets (12) and low-hardness sheets (see Figure 3) can be obtained. 1 6). 4. Superimpose most of the high-hardness sheets into a primordial body, and make the top mask of the primal body have a recessed space: After cutting into two sheets of different hardness (12) (16), make as required For the weight of the finished shoe body, an appropriate number of the two sheets are used to overlap to form the to-be-foamed body (30) shown in the fourth figure. Among them, please refer to the third figure, a plurality of pieces (such as eight to ten pieces) of high-hardness sheets (12) are stacked to form a primitive body (20), and a concave space (2 5 is provided on the top surface of the primitive body). ). In this embodiment, an inner hole (1 4) is cut out from each of a plurality of sheets (12) (for example, four pieces) located on the upper part of the primitive body (20), and the inner holes (1 4) ) To form the recessed space (2 5). The perimeter of the primary body (20) may be additionally ignited with a plurality of fixing parts (26) by an appropriate electric heater, so that the sheets (1 2) are initially fixed, so that the primary body will not be detached. It must be stated that in the above step 2, each sheet (10) produced has not been foamed, so the waste material generated after cutting out the sheet (12) (16) < 17 丨 χ 2 Cut the inner hole ⑴) The waste material (19) formed can be recycled again; = the material is cooled and cut through the rolling of the roller machine and the tablet machine, and can be re-formed into a cymbal (1 0) for re-cutting Into sheet. Fifth, put a number of low hardness sheets into the recessed space of the original body, shape

Page 7 585749 V. Description of the invention (5) Form a foam to be prepared: (For example, after the initial body (20) is formed, put several pieces of low hardness sheet (16), / # 7 ^ into the beginning The recessed space (25) of the body (20) completes the ready-to-go 1. Each of the low-hardness sheets (16) is an internally complete sheet body, and the size is approximately equal to the inner hole (1 4). 6. The foam to be foamed is placed in a mold: In the process, the foam to be foamed (30) is moved into the cavity of the mold to foam. I The mold used in the present invention has its special features. Eight holes please read the fifth picture, the mold (40) above and below the mold system are equipped with a number of molds and ancient slack tools in one of the mold body, such as the lower mold (42), the clamping surface of the mold is buried ring The sealing ring (44) made of rubber and the cavity (45) are located in the area enclosed by the sealing garden. In addition, at least one of the mold bodies of the mold is sealed.

Within the Hi range are #exhaust holes (46). These exhaust holes are located on the mold closing surface of the body, instead of being located in the cavity (45), and connected to the exhaust by a vacuum suction device. Stomata (46). ^ When you want to foam, place each to-be-foamed body (30) in each cavity (45), and U ,: 丨 Ιϊ? 1) (42) close the mold. The present invention is provided with a sensor at the position of the mold. Hibiscus, measuring die status. During the mold clamping process, 'when the sensor senses that the lower ring (44) is in contact with the upper mold ⑷), as shown in the sixth figure *, mold mold 25 = mold clamping action' at this time 'the seal ring (44) The range around the vacuum suction device and the vacuum suction device (46) through the air suction holes (46) will be dense = vacuuming, then the cavity (45) of the upper and lower molds can be wide.俟 After the vacuum state is completed, the mold is closed to form the closed center of the seventh figure. The mold (40) is provided with recesses around each cavity (45) of at least one mold body.

Page 8 585749 V. Description of the invention (6) Lip (48) 'When the mold cavity (45) is tightly closed, the clamping surfaces of the upper and lower molds are fully closed and there is still a gap, so after the mold is closed, the seal ring (44) It will be crushed and deformed without damage. After the fork is closed, the appropriate temperature (such as 丨 70 art) and time (such as J 0 minutes) are repeated to foam each to-be-foamed body (30) in the cavity. The size of each cavity is the product of the original embryo. During the molding process, the sheets (12) (16) will be heated and melted to form a liquid and flow in the cavity, because the interior of the cavity is in a vacuum state. The chemical composition of the state is easy to flow, and the heat is easily conducted to increase the plastic effect. Because the configuration of the foam to be foamed (30) has made the high hardness and low rider hardness sheets (1 2) (16) each in an appropriate position, during the molding process, these objects (12) (16) A chemical reaction occurs at its location. The liquid melt will flow to the minimum pressure when flowing in the mold cavity, so the high hardness sheets (12) (that is, those without inner holes (14)) for the lower half of the foam (30) will Flow toward the recessed space (25) and squeeze below the low-hardness sheet (16); the low-hardness sheet (16) is limited by the recessed space (25) and remains in the recessed space to generate a reaction. During the reaction, the high and low hardness sheets (16) have the same composition, so they will completely blend. In this embodiment, the low-hardness sheet and the high-hardness sheet have the same foaming ratio: the same foaming ratio, so as to achieve a good foaming effect and reduce the internal = each. Foam molding: After the foaming time is completed, the foamed object in the mold cavity has completed the chemical reaction. 'Mold (40) opens the mold |, and the foam will jump out of the mold cavity and follow the mold cavity. Shape. In this example, the foaming rate is 6 times the point, 585749 V. Description of the invention (7) The volume of the molded product is 6 times as large as the cavity. The molded sole (50) is not as shown in Figures 8 and 9, and the actual photo is as attached. The central area on the top surface of the sole is the soft area (52) (the light green area shown in the photo) foamed by the low-hardness sheet (16), while the periphery and bottom of the sole are issued by the high-hardness sheet. Foamed hard area (54) (blue part on the photo). When worn, the soft area (52) corresponds to the sole of the foot, and its physical properties are relatively soft, so that the sole feels a soft touch to provide comfortable wearing; while the hard area (54) is relatively hard. The feet provide good protection and good grip. The sole provided by the manufacturing method of this description has the following effects: 1. The present invention is to make the foamed material foamed at the same time, it also has areas of different soft hardness, and has both comfort and protection requirements. First. And as can be seen from the attached photo, the soft area (52) and the hard area (⑷ have complete bonding, and the interface is flat and free of drops. 2. As shown in the photo, the soft and hard areas can be of different colors. The beauty of the foam. In addition, before the mold is placed, and it is respectful and free, you can have different colors of color blocks on the top surface of the sole after the foam is colored # 'after molding. 'The distribution state formed by color blocks such as orange color in the photo is in the sole of each shoe = color temple remoteness. And the most important thing is that the present invention is foaming: 彳 species = no need to carry out coloring after foaming. The color of Baixi is three. This: The waste scraps cut during the manufacturing process can be recycled and reused repeatedly, which will not cause (1179) (19). Bianming can also save many traditions. The manufacturing method is to glue, repair the chief and make the high-pollution manufacturing process. &Quot; Erasing and other troublesome 585749 5. Description of the invention (8) 4. The exhaust holes for vacuuming according to the present invention are provided in the mold clamping body. The surface, instead of being set in the cavity, will not be blocked by the foam, so no cleaning is required Suction holes, and there will be no misjudgment of the state of vacuum. In summary, the present invention is a pioneering technical means, highly creative and industrially applicable, and has progressive effects, according to the law Application.

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Brief Description of the Drawings \ The drawing is a manufacturing flowchart of the present invention-a preferred embodiment. The die Γ shows two rolls cut into thin slices. The second graph f shows the overlapping relationship between high and low hardness sheets. The fourth figure is a perspective view of the third figure in which the sheets are stacked into a foam to be foamed. The fifth figure shows the lower mold of a preferred embodiment of the present invention. The sixth figure is a sectional view of the mold clamping and vacuuming. The seventh figure is a state in which the mold of the sixth figure is completely closed. The eighth figure is a perspective view of a foamed sole. The ninth figure is a sectional view of the eighth figure.

Brief description of drawing number: Sheet (1 0) High hardness sheet (1 2) Primitive body (20) Fixing part (26) Mold (40) Sealing ring (44) Exhaust hole (46) Soft area (52) Inner hole ( 1 4) Low hardness sheet (1 6) Recessed space (2 5) To be foamed (30) Upper and lower mold (41) (42) Cavity (4 5) Sole (5 0) Hard area (5 4)

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Claims (1)

585749 6. Scope of patent application1. A method for making a single foamed sole with different soft hardness, which includes the following steps: 1. Mixing most chemical materials into two different soft hardness components: At least two kinds of chemical materials with different hardness and softness are mixed with processing aids to mix and compact into two kinds of chemical composition, one of which has a higher physical property and the other has a lower hardness; 2. The two compositions are rolled and cut into thin pieces respectively: The one composition is rolled and cut into multiple pieces separately 丨 3. Cut the thin film of the two components into a high-hardness sheet and a low-hardness sheet: Cut the thin-film of the high-hardness composition into a piece of high-hardness sheet, and cut the low-hardness composition The sheet is cut into a piece of low-hardness sheet, and the two kinds of southern soft-hardness sheets can be the same size, in which an inner hole is cut out in each of the second kinds of high-soft-hardness sheets; Fourth, the majority of the high-hardness sheets are stacked into an initial body, and the top body of the initial body has a concave space: The majority of the high-hardness sheets are stacked on top of each other to form a primitive body; the top mask of the primitive body has a recessed space of an appropriate depth; 5. Put a plurality of low-hardness sheets into the recessed space of the primitive body to form A foam to be foamed: Place an appropriate number of low-density sheets into the recessed space of the precursor, and the size of each of the low-hardness sheets is approximately equal to the inner hole; thereby forming a foam to be foamed; Page 13 585749 VI. Application scope of patents--VI. Placing the body to be foamed in a mold: Put the precursor into the cavity of a mold, and make it available in the mold with appropriate temperature and time. VII. Open the mold to foam the foam: After the foaming conditions are completed, open the mold to complete the foaming outside the mold to form a finished product of the sole. 2. The manufacturing method as described in item 丨 · of the scope of patent application, wherein the high-hardness and low-hardness f compositions have the same composition, and in the high-hardness composition, the content of the hardness is higher than that of the chemical materials in the south. Those with low hardness. 3. The manufacturing method described in item 1 of the scope of patent application, wherein the high-hardness and low-hardness composition has the same composition, and in the high-hardness composition, the content of the lower hardness chemical material is lower than the low-hardness Composer. 4. The manufacturing method described in item 1 of the scope of patent application, wherein the main components of the high-hardness and low-hardness compositions are the same. > ^ • According to the manufacturing method described in item 1 of the scope of patent application, in step 3, f 忒 sheet waste generated from cutting the two sheets can be recovered and re-formed into sheet after step 2. 6 · The manufacturing method as described in item 1 of the scope of patent application, wherein: the high-hardness = the preform superimposed before being placed in the mold, the outer periphery of the preform is properly fixed. Ximin L is the manufacturing method as described in item 6 of the scope of patent application, wherein: the initial body °, 彖, are used to fix these high hardness sheets by electrocautery. 8. The manufacturing method as described in item 1 of the scope of patent application, wherein the inner parts of the high-hardness sheets located in the upper part of the blade a are each cut out of an inner hole. 585749 VI. Application for Patent ’The inner holes form the concave space. Among them: cutting each two and then making a thin sheet ^ In step 5 9 · According to the manufacturing method described in item 8 of the scope of patent application, the waste material formed by the inner hole can be recycled, through step 10 · As in the scope of patent application The manufacturing method described in item 1 # Before the mold is completely closed, a vacuum is drawn between the molds, and the cavity is in a vacuum state. After the vacuum state is completed, the mold is completely closed. The soft hardness is formed by one-time foaming, and the sole is made up of> a chemical composition with different soft hardness: the center is composed of a lower hardness chemical group. So: i =: the soft area It has relatively soft physical properties; in addition to the soft area, the outer and bottom surfaces of the sole are made of a hardened and fine foamed hard area, and the hard area has harder properties. House 1 2 · Shoe soles as described in item 11 of the scope of patent application, in which ... this type of chemical composition has the same chemical system (for example, the same & dilute factory. 1 乂 13-a kind used to make tools One-time foam molding 'shoe mold of different soft hardness, the mold It is composed of two phantoms, which can be closed and opened. There are several mold cavities in the mold body for the foam to be in the two cavities of the mold cavity. A sealing ring is provided on the clamping surface of one of the phantoms; the mold cavities are located within the range surrounded by the sealing ring; at least one air vent is provided on at least one phantom and penetrates to the phantom The mold-clamping surfaces are located within the range of the sealing ring; a predetermined number of lips are provided on the periphery of each cavity of at least one mold body, and each of the lips is convex outward from the periphery of each cavity From; clamping on the two phantom Page 15 585749 6. When the scope of patent application is not completely closed, the sealing ring is in contact with the clamping surface of the other mold body; when the two mold bodies are completely closed, a closed mold is generated by the lip edge. The state of the hole. 14 The mold as described in item 13 of the scope of patent application, wherein: the periphery of the cavity of each mold body is provided with a lip. Page 16