ETPU sole forming mold

Abstract

The utility model relates to the technical field of shoe material equipment, in particular to an ETPU shoe sole forming mold which comprises an upper mold and a bottom mold which cover each other, and a mold cavity is defined by the upper mold and the bottom mold; the mold cavity is divided into a first mold cavity and a second mold cavity in the direction from the bottom mold to the upper mold, the first mold cavity is used for containing a TPU bottom sheet, and the second mold cavity is used for containing ETPU foaming beads; forming patterns are arranged on the bottom side wall of the mold cavity and used for forming bottom patterns of the TPU bottom piece, and the TPU bottom piece is subjected to mold pressing to form the wear-resistant outsole; the ETPU foaming beads are foamed into the elastic midsole, and the wear resistance of the wear-resistant outsole is greater than that of the elastic midsole. In the invention, the TPU bottom sheet and the ETPU foaming beads can be integrally formed in the forming mold, so that the manufacturing process of the sole is simplified, the performance of the ETPU material is fully played, and the ETPU sole has high resilience and wear resistance.

Description

TECHNICAL FIELD

[0001] The application relates to the field of shoe material equipment, in particular to an ETPU shoe sole forming die. BACKGROUND

[0002] ETPU (foamed thermoplastic polyurethane elastomer) is a new type of material, which is made by physically foaming TPU (thermoplastic polyurethane elastomer) material, and has the characteristics of high resilience and low density.

[0003] ETPU shoe sole is a shoe sole material processed by ETPU material, and the ETPU shoe sole has the properties of high resilience and low wear resistance; therefore, the ETPU shoe sole is usually used as a resilient midsole, and a wear-resistant rubber outsole is arranged at the bottom of the ETPU shoe sole to realize the wear-resistant and anti-skid performance of the shoe sole.

[0004] That is, the ETPU shoe sole is first processed by using the ETPU shoe sole forming die, and then the ETPU shoe sole and the rubber outsole are connected by using glue, but the gluing operation of the ETPU shoe sole and the rubber outsole increases the manufacturing process of the shoe sole, and the glue has a heavy odor and poor environmental protection. Content of the utility model

[0005] In order to simplify the manufacturing process of the shoe sole and fully exert the performance of the ETPU material, the application provides an ETPU shoe sole forming die.

[0006] The application provides an ETPU shoe sole forming die, which adopts the following technical scheme:

[0007] An ETPU shoe sole forming die comprises a coverable upper die and a lower die, the upper die and the lower die surround a die cavity, the upper die is provided with a first exhaust hole, the first exhaust hole is in communication with the die cavity; along the direction from the lower die to the upper die, the die cavity is divided into a first die cavity and a second die cavity, the first die cavity is used for accommodating a TPU bottom sheet, and the second die cavity is used for accommodating ETPU foamed beads; a forming pattern is arranged on the bottom side wall of the die cavity, the forming pattern is used for forming a pattern at the bottom of the TPU bottom sheet, and the TPU bottom sheet is molded into a wear-resistant outsole; the ETPU foamed beads are foamed into a resilient midsole, and the wear-resistant performance of the wear-resistant outsole is greater than that of the resilient midsole.

[0008] By adopting the technical scheme, since the TPU bottom sheet and the ETPU foamed beads are both polyurethane materials, the melting point and molding conditions of the TPU bottom sheet and the ETPU foamed beads are the same; thus, the TPU bottom sheet and the ETPU foamed beads can be integrally molded in the mold cavity to form the ETPU sole. Due to the difference in performance between the TPU bottom sheet and the ETPU foamed beads, the wear-resistant outsole formed after the TPU bottom sheet is patterned has good wear resistance, and the elastic midsole foamed from the ETPU foamed beads has good resilience, so that the ETPU sole has both high resilience and wear resistance.

[0009] That is, by providing a forming pattern on the bottom die and dividing the mold cavity into a first mold cavity and a second mold cavity, the TPU bottom sheet and the ETPU foamed beads can be integrally molded in the molding die, the manufacturing process of the sole is simplified, the performance of the ETPU material is fully utilized, and the ETPU sole has both high resilience and wear resistance.

[0010] Optionally, the bottom die is provided with a second exhaust hole penetrating the bottom side wall of the mold cavity, the second exhaust hole is in communication with the first mold cavity, and the second exhaust hole is used for discharging gas between the TPU bottom sheet and the forming pattern.

[0011] By adopting the technical scheme, the second exhaust hole can discharge the gas between the TPU bottom sheet and the forming pattern, which is beneficial to the clear formation of the pattern on the bottom of the wear-resistant outsole.

[0012] Optionally, the forming pattern is provided with a plurality of positioning columns, and the TPU bottom sheet is provided with positioning holes for the positioning columns to pass through, and the positioning columns are used for limiting the position of the TPU bottom sheet.

[0013] By adopting the technical scheme, the position of the TPU bottom sheet in the mold is limited by the cooperation of the positioning columns and the positioning holes on the TPU bottom sheet, so as to improve the quality of the foaming molding of the ETPU sole.

[0014] Optionally, along the direction from the bottom die to the upper die, the area of the cross section of the positioning column decreases.

[0015] By adopting the technical scheme, the positioning column has a trapezoidal cross section, so as to facilitate the demolding of the ETPU sole.

[0016] Optionally, the end of the positioning column extends into the second mold cavity.

[0017] By adopting the technical scheme, the end of the positioning column extends into the second mold cavity, so that a spacing is provided between the end of the positioning column and the TPU bottom sheet, so as to improve the limiting effect of the positioning column on the TPU bottom sheet.

[0018] Optionally, the bottom mold is further provided with a third exhaust hole, the third exhaust hole penetrates the positioning column, and the third exhaust hole is in communication with the second mold cavity.

[0019] By adopting the above technical scheme, the third exhaust hole is arranged on the bottom mold, and the third exhaust hole is in communication with the second mold cavity. The third exhaust hole can exhaust the gas in the second mold cavity, so that when the ETPU foaming beads in the second mold cavity flow in the foaming forming process, the high-temperature gas is beneficial to the ETPU foaming beads, the foaming forming effect of the ETPU foaming beads is improved, and the uniformity of the elastic midsole foaming is improved.

[0020] Optionally, the second mold cavity is further used for accommodating a carbon fiber plate, the carbon fiber plate is arranged between the TPU bottom sheet and the ETPU foaming beads, the positioning column is used for abutting against the carbon fiber plate, and the positioning column is used for fixing the position of the carbon fiber plate.

[0021] By adopting the above technical scheme, the carbon fiber plate is limited by the positioning column, so that the carbon fiber plate is arranged between the TPU bottom sheet and the ETPU foaming beads. After the ETPU shoe sole is foamed and formed, the carbon fiber plate is fixed between the wear-resistant outsole and the elastic midsole, and the torsional resistance of the shoe sole can be improved.

[0022] Optionally, the upper mold is internally provided with an upper steam flow channel for steam flow, the upper mold is provided with a first air inlet hole, the first air inlet hole is in communication with the upper steam flow channel, steam enters the mold cavity through the upper steam flow channel and the first air inlet hole, and the bottom mold is internally provided with a lower steam flow channel for steam flow.

[0023] By adopting the above technical scheme, the high-temperature steam in the upper steam flow channel and the lower steam flow channel provides heat for the TPU bottom sheet and the ETPU foaming beads in the mold cavity, so as to improve the foaming quality of the ETPU shoe sole.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. By arranging a forming pattern on the bottom mold and dividing the mold cavity into a first mold cavity and a second mold cavity, the TPU bottom sheet and the ETPU foaming beads can be integrally formed in the forming mold, the manufacturing process of the shoe sole is simplified, the performance of the ETPU material is fully utilized, and the ETPU shoe sole has high resilience and wear resistance;

[0026] 2. By arranging a second exhaust hole on the bottom mold, the second exhaust hole can exhaust the gas between the TPU bottom sheet and the forming pattern, which is beneficial to the clear formation of the tread pattern of the wear-resistant outsole.

[0027] 3. A third exhaust hole is arranged on the bottom die, and the third exhaust hole is communicated with the second mold cavity, and the third exhaust hole can exhaust the gas in the second mold cavity, so that when the ETPU foaming beads in the second mold cavity flow in the foaming forming process, the high-temperature gas is beneficial to flow to different ETPU foaming beads, the foaming forming effect of the ETPU foaming beads is improved, and the uniformity of the foaming of the elastic midsole is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic view of the ETPU sole structure in embodiment 1.

[0029] Figure 2 is a schematic view of the structure of the molding mold before closing in embodiment 1.

[0030] Figure 3 is Figure 2 is an enlarged view of A in FIG. 1.

[0031] Figure 4 is a schematic view of the structure of the molding mold after closing in embodiment 1.

[0032] Figure 5 is Figure 4 is an enlarged view of B in FIG. 1.

[0033] Figure 6 is a schematic view of the ETPU sole structure in embodiment 2.

[0034] Figure 7 is a schematic view of the structure of the molding mold after closing in embodiment 2.

[0035] Reference signs: 1, elastic midsole; 2, wear-resistant outsole; 3, upper mold; 31, limiting protrusion; 32, upper steam flow channel; 33, first air inlet hole; 34, first exhaust hole; 4, bottom die; 41, accommodating groove; 42, forming pattern; 43, positioning column; 44, second exhaust hole; 45, third exhaust hole; 46, lower steam flow channel; 5, mold cavity; 51, first mold cavity; 52, second mold cavity; 6, carbon fiber plate; 7, TPU bottom sheet; 71, positioning hole; 8, ETPU foaming bead. DETAILED DESCRIPTION

[0036] The application will be further described in detail below with reference to the accompanying drawings 1-7. Figure 1

[0037] Embodiment 1

[0038] The embodiment of the application discloses an ETPU sole molding mold, and the molding mold is used for producing an ETPU sole.

[0039] With reference to Figure 1 ​, the ETPU sole includes an elastic midsole 1 and a wear-resistant outsole 2, the elastic midsole 1 is fixed on the wear-resistant outsole 2, and the elastic midsole 1 and the wear-resistant outsole 2 are both polyurethane materials. The wear-resistant performance of the wear-resistant outsole 2 is greater than that of the elastic midsole 1, so that the wear-resistant outsole 2 can directly contact the ground. That is, the ETPU sole can be directly fixedly connected with the upper body to form a shoe, so as to simplify the manufacturing process of the shoe.

[0040] The wear-resistant performance of the elastic midsole 1 and the wear-resistant outsole 2 can be detected by the NBS wear resistance test. Under the same test conditions, the number of revolutions of the elastic midsole 1 and the wear-resistant outsole 2 is measured when the thickness is worn to 2.5 millimeters on the NBS wear tester; the ratio of the number of revolutions of the elastic midsole 1 and the wear-resistant outsole 2 to the number of revolutions of the standard rubber test piece is the wear-resistant coefficient of the elastic midsole 1 and the wear-resistant outsole 2. In this embodiment, the wear-resistant coefficient of the wear-resistant outsole 2 is greater than that of the elastic midsole 1.

[0041] Referring to Figure 2 and Figure 3 , the ETPU sole forming mold includes a top mold 3 and a bottom mold 4 that are hinged together, the bottom mold 4 is provided with a containing groove 41, the top mold 3 is provided with a limiting protrusion 31, the limiting protrusion 31 covers the slot of the containing groove 41, and the limiting protrusion 31 and the groove side wall of the containing groove 41 surround the mold cavity 5. The groove bottom wall of the containing groove 41 is provided with a sole forming pattern 42 to form the sole pattern of the ETPU sole.

[0042] Referring to Figure 4 and Figure 5 , along the direction from the bottom mold 4 to the top mold 3, the mold cavity 5 is divided into a first mold cavity 51 and a second mold cavity 52, the first mold cavity 51 is used to contain a TPU sheet 7, and the second mold cavity 52 is used to contain an ETPU foaming bead 8. The bottom side wall of the mold cavity 5 is provided with a forming pattern 42, which is used for the forming of the bottom pattern of the TPU sheet 7; to form a plurality of anti-skid convex patterns on the bottom of the wear-resistant outsole 2, and improve the anti-skid performance of the ETPU sole. The TPU sheet 7 is formed into the wear-resistant outsole 2 after being molded, and the ETPU foaming bead 8 is foamed into the elastic midsole 1.

[0043] Referring to Figure 2 and Figure 4In the embodiment, the forming mold uses a steam heating method to heat the material in the mold cavity 5. In the embodiment, the upper die 3 has an upper steam flow channel 32 inside for steam flow, the limiting convex body is provided with a first air inlet hole 33, the first air inlet hole 33 is in communication with the upper steam flow channel 32, and the steam enters the mold cavity 5 through the upper steam flow channel 32 and the first air inlet hole 33; the bottom die 4 is internally provided with a lower steam flow channel 46 for steam flow. The upper steam flow channel 32 and the lower steam flow channel 46 are in communication with the steam generating device. The high-temperature steam in the upper steam flow channel 32 and the lower steam flow channel 46 provides heat for the TPU bottom sheet 7 and the ETPU foaming beads 8 in the mold cavity 5, so as to improve the foaming quality of the ETPU sole.

[0044] With reference to Figure 2 and Figure 4 , the upper die 3 is provided with a first exhaust hole 34, and the first exhaust hole 34 is in communication with the mold cavity 5. The bottom die 4 is provided with a second exhaust hole 44, and the second exhaust hole 44 penetrates the bottom side wall of the mold cavity 5 and is in communication with the first mold cavity 51. The second exhaust hole 44 is used for discharging the gas between the TPU bottom sheet 7 and the forming pattern 42, which is beneficial to the clear formation of the tread of the wear-resistant outsole 2.

[0045] With reference to Figure 4 and Figure 5 , the forming pattern 42 is provided with a plurality of positioning columns 43, and the TPU bottom sheet 7 is provided with positioning holes 71 for the positioning columns 43 to pass through. The positioning columns 43 are used to limit the position of the TPU bottom sheet 7. Along the direction from the bottom die 4 to the upper die 3, the cross-sectional area of the positioning column 43 decreases. Through the cooperation of the positioning column 43 and the positioning hole 71 on the TPU bottom sheet 7, the position of the TPU bottom sheet 7 in the mold is limited, so as to improve the quality of the foaming and forming of the ETPU sole. At the same time, the positioning column 43 has a trapezoidal cross section, so as to facilitate the demolding of the ETPU sole.

[0046] With reference to Figure 4 and Figure 5 , in the embodiment, the end of the positioning column 43 extends into the second mold cavity 52; the bottom die 4 is further provided with a third exhaust hole 45, and the third exhaust hole 45 penetrates the positioning column 43 and is in communication with the second mold cavity 52. By arranging the third exhaust hole 45 on the bottom die 4 and making the third exhaust hole 45 in communication with the second mold cavity 52, the third exhaust hole 45 can discharge the gas in the second mold cavity 52, so as to facilitate the flow of high-temperature gas to different ETPU foaming beads 8 during the foaming and forming of the ETPU foaming beads 8 in the second mold cavity 52, improve the foaming and forming effect of the ETPU foaming beads 8, and improve the uniformity of the foaming of the elastic midsole 1.

[0047] The implementation principle of the ETPU sole forming mold in the embodiment is as follows:

[0048] With reference toFigure 4 And Figure 5 Since the TPU bottom sheet 7 and the ETPU foamed beads 8 are both polyurethane materials, the melting points and molding conditions of the TPU bottom sheet 7 and the ETPU foamed beads 8 are the same, so that the TPU bottom sheet 7 and the ETPU foamed beads 8 can be integrally molded in the mold cavity 5 to form an ETPU sole, and the TPU bottom sheet 7 and the ETPU foamed beads 8 can be fully adhered to have a large connection strength between the elastic midsole 1 and the wear-resistant outsole 2.

[0049] And due to the difference in performance between the TPU bottom sheet 7 and the ETPU foamed beads 8, the TPU bottom sheet 7 is softened and molded to form the wear-resistant outsole 2, and the wear-resistant outsole 2 has good wear resistance. The elastic midsole 1 foamed by the ETPU foamed beads 8 has good rebound performance; so that the ETPU sole has high rebound and wear resistance.

[0050] In summary: by setting the molding pattern 42 on the bottom die 4, and dividing the mold cavity 5 into the first mold cavity 51 and the second mold cavity 52, the TPU bottom sheet 7 and the ETPU foamed beads 8 can be integrally molded in the molding mold, simplifying the manufacturing process of the sole, fully utilizing the performance of the ETPU material, and making the ETPU sole have high rebound and wear resistance.

[0051] Embodiment 2

[0052] The difference between this embodiment 2 and the embodiment 1 is:

[0053] Referring to Figure 6 The ETPU sole further includes a carbon fiber plate 6, which is fixed between the elastic midsole 1 and the wear-resistant outsole 2 to improve the torsion resistance of the ETPU sole.

[0054] Referring to Figure 7 In the ETPU sole molding mold, the second mold cavity 52 is also used to accommodate the carbon fiber plate 6, the carbon fiber plate 6 is arranged between the TPU bottom sheet 7 and the ETPU foamed beads 8, the positioning column 43 is used to abut against the carbon fiber plate 6, and the positioning column 43 is used to fix the position of the carbon fiber plate 6. The positioning column 43 can be arranged on the outer periphery of the carbon fiber plate 6, and also limits the position of the carbon fiber plate 6, so as to arrange the carbon fiber plate 6 between the TPU bottom sheet 7 and the ETPU foamed beads 8; so that after the ETPU sole is foamed and molded, the carbon fiber plate 6 is fixed between the wear-resistant outsole 2 and the elastic midsole 1.

[0055] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An ETPU sole forming mold characterized by: The mould includes a cover upper die (3) and a bottom die (4), the upper die (3) and the bottom die (4) surround a mould cavity (5), the upper die (3) is provided with a first exhaust hole (34), the first exhaust hole (34) is communicated with the mould cavity (5); along the direction from the bottom die (4) to the upper die (3), the mould cavity (5) is divided into a first mould cavity (51) and a second mould cavity (52), the first mould cavity (51) is used for accommodating a TPU bottom sheet (7), the second mould cavity (52) is used for accommodating ETPU foamed beads (8); the bottom side wall of the mould cavity (5) is provided with a forming pattern (42), the forming pattern (42) is used for forming the bottom pattern of the TPU bottom sheet (7), the TPU bottom sheet (7) is moulded into a wear-resistant outsole (2); the ETPU foamed beads (8) are foamed into an elastic midsole (1), the wear-resistant performance of the wear-resistant outsole (2) is greater than that of the elastic midsole (1).

2. The ETPU sole forming mold of claim 1, wherein: The bottom die (4) is provided with a second exhaust hole (44), the second exhaust hole (44) penetrates the bottom side wall of the mould cavity (5), the second exhaust hole (44) is communicated with the first mould cavity (51), and the second exhaust hole (44) is used for discharging the gas between the TPU bottom sheet (7) and the forming pattern (42).

3. The ETPU sole forming mold of claim 1, wherein: The forming pattern (42) is provided with a plurality of positioning columns (43), the TPU bottom sheet (7) is provided with a positioning hole (71) for penetrating the positioning column (43), and the positioning column (43) is used for limiting the position of the TPU bottom sheet (7).

4. The ETPU sole forming mold of claim 3, wherein: Along the direction from the bottom die (4) to the upper die (3), the cross-sectional area of the positioning column (43) decreases.

5. The ETPU sole forming mold of claim 3, wherein: The end of the positioning column (43) extends into the second mould cavity (52).

6. The ETPU sole forming mold of claim 5, wherein: The bottom die (4) is further provided with a third exhaust hole (45), the third exhaust hole (45) penetrates the positioning column (43), and the third exhaust hole (45) is communicated with the second mould cavity (52).

7. The ETPU sole forming mold of claim 5, wherein: The second mould cavity (52) is further used for accommodating a carbon fiber plate (6), the carbon fiber plate (6) is arranged between the TPU bottom sheet (7) and the ETPU foamed beads (8), the positioning column (43) is used for abutting against the carbon fiber plate (6), and the positioning column (43) is used for fixing the position of the carbon fiber plate (6).

8. The ETPU sole forming mold of claim 1, wherein: The upper die (3) is internally provided with an upper steam flow channel (32) for steam flow, the upper die is provided with a first air inlet (33), the first air inlet (33) is communicated with the upper steam flow channel (32), steam enters the mould cavity (5) through the upper steam flow channel (32) and the first air inlet (33); the bottom die (4) is internally provided with a lower steam flow channel (46) for steam flow.

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