Shoe forming device

Abstract

The utility model relates to the technical field of molds, and discloses a footwear molding device with high demolding reliability, the footwear molding device comprises a bottom mold (100), an upper mold (200), an upper cover plate (300), a middle plate (400) and inner cores (500, 320), the outer edges of a first part (500) and a second part (320) of the inner cores and the inner wall of a placing space form a mold cavity (250) of a flowable thermoplastic material; a plurality of ejector rods (330) are arranged on the upper end face of the upper cover plate (300), and the ejector rods (330) penetrate through the upper die (200) and extend into the inner core; during demolding, the bottom mold (100) and the middle plate (400) are separated from the upper mold (200), and the ejector rod (330) ejects the bottom of the inner core out along the axis of the upper mold (200), so that the first part (500) and the second part (320) of the inner core are separated from the upper mold (200).

Description

Technical Field

[0001] The present invention relates to the field of mold technology, and more particularly to a shoe molding device. Background Art

[0002] Shoe molds are a common feature in the shoemaking industry. They are typically used to create uppers or soles. Using the injection molding method for one-piece shoes, thermoplastic materials such as rubber, foam rubber, thermoplastic elastomers, or ethylene-vinyl acetate copolymers are injected into a mold using an injection molding machine. The mold typically consists of a core and an outer mold. The core, often called a last or last, matches the outer mold to form an annular closed cavity, which serves as the molding location for the one-piece shoe.

[0003] However, after the shoe body is formed, when removing the mold, the outer membrane and the inner membrane are generally separated left and right. The demolding process is relatively complicated, and there will be mold marks on the appearance, such as the parting line is located on the front or side of the shoe upper, which affects the appearance of the shoe upper. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that, in the prior art, after the above-mentioned shoe body is formed, when demolding, the outer membrane and the inner membrane are generally separated to the left and right. The demolding process is relatively complicated, and there will be mold marks on the appearance, such as the parting line is located on the front or side of the shoe upper, which affects the aesthetic defects of the shoe upper. A shoe molding device with higher demolding reliability is provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is to construct a shoe forming device having:

[0006] The bottom mold is formed into a square body structure and has at least one placement groove formed on its upper end surface;

[0007] A middle plate is arranged above the bottom mold, and an upper end surface of the middle plate is provided with a limiting groove corresponding to the placement groove;

[0008] an upper mold, which is formed into a through structure, and a lower end surface of which is arranged to fit the upper end surface of the middle plate to form a placement space;

[0009] an upper cover plate, the lower end of which is arranged on the upper end surface of the upper mold;

[0010] The inner benevolence is set up as the first and second parts,

[0011] The first part of the inner core is arranged in the placement space,

[0012] The second part of the inner core is arranged on the lower end surface of the upper cover plate, wherein:

[0013] The outer edges of the first part and the second part of the inner core form a cavity for the flowable thermoplastic material with the inner wall of the placement space;

[0014] Wherein, a plurality of ejector rods are provided on the upper end surface of the upper cover plate, and the ejector rods pass through the upper mold and extend into the inner core;

[0015] During demolding, the bottom mold and the middle plate are separated from the upper mold, and the ejector rods push out the bottom of the inner core along the axis of the upper mold, so that the first part and the second part of the inner core are separated from the upper mold.

[0016] In some embodiments, the first part and the second part of the inner core are separably arranged.

[0017] In some embodiments, ribs are provided in the placement groove in a radial or axial direction.

[0018] In some embodiments, the placement groove is used for placing the sole to be molded.

[0019] In some embodiments, at least one injection pipe is arranged between the ejector rods,

[0020] The injection pipe is axially arranged on the upper cover plate, and injection from top to bottom can be realized through the injection pipe.

[0021] In some embodiments, one end of the injection pipe is arranged on the upper end surface of the upper cover plate,

[0022] One end of the injection pipe passes through the upper cover plate, the upper mold and the middle plate and extends to the upper end surface of the bottom mold.

[0023] In some embodiments, the upper cover plate and the second part of the inner core are integrally arranged.

[0024] In some embodiments, the bottom of the first part of the inner core is attached to the middle plate to support the first part of the inner core.

[0025] In some embodiments, cavities are provided between the bottom edge of the first part of the inner core and the middle plate.

[0026] In the shoe forming device of the present invention, it includes a bottom mold, a middle plate, an upper mold, an inner core and an upper cover plate. Among them, multiple ejector rods are provided on the upper end surface of the upper cover plate, and the ejector rods pass through the upper mold and extend into the inner core; during demolding, the bottom mold and the middle plate are separated from the upper mold, and the ejector rods push the bottom of the inner core out along the axis of the upper mold, so that the inner core is separated from the upper mold. Compared with the prior art, by providing multiple ejector rods on the upper end surface of the upper cover plate, during demolding, first separate the bottom mold and the middle plate from the upper mold, and the formed shoe sole is separated. Then, by applying high pressure, one end of the ejector rod is pushed out along the bottom side of the axis of the upper mold, so that the first part and the second part of the inner core are separated from the upper mold, thereby improving the reliability and convenience of mold opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0028] Figure 1 is a perspective view of an embodiment of the shoe forming device provided by the present invention;

[0029] Figure 2 is an exploded view of an embodiment of the shoe forming device provided by the present invention;

[0030] Figure 3 is a cross-sectional view of an embodiment of the shoe forming device provided by the present invention;

[0031] Figure 4 is a cross-sectional view of another embodiment of the shoe forming device provided by the present invention;

[0032] Figure 5 is a cross-sectional view of yet another embodiment of the shoe forming device provided by the present invention;

[0033] Figure 6 is a cross-sectional view of still another embodiment of the shoe forming device provided by the present invention;

[0034] Figure 7 is a demolding schematic diagram of an embodiment of the shoe forming device provided by the present invention;

[0035] Figure 8 is a demolding schematic diagram of another embodiment of the shoe forming device provided by the present invention;

[0036] Figure 9 is a perspective view of an embodiment of the upper cover plate provided by the present invention;

[0037] Figure 10 is Figure 3 an enlarged view of part A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to have a clearer understanding of the technical features, objectives and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0039] As Figures 1 - 7 shown, in the first embodiment of the shoe molding device of the present invention, the shoe molding device 10 includes a bottom mold 100, an upper mold 200, an upper cover plate 300, a middle plate 400, and inner cores (320, 500);

[0040] Among them, the bottom mold 100 is formed in a square body structure, and two or more placement grooves 110 are formed on the upper end surface of the bottom mold 100;

[0041] As Figure 3 and Figure 10 shown, the upper mold 200 is formed in a square body structure, and the upper mold 200 is provided with a vertically penetrating structure 210a. The penetrating structure 210a can be understood as a cavity 250, that is, the product forming area;

[0042] As Figure 4 shown, the inner cores (320, 500) are provided in two (i.e., left / right feet), and are used to simulate the leg-to-foot structure of the human body shape;

[0043] Among them, the inner core includes a first part 500 and a second part 230. The first part 500 and the second part 230 can be detachably arranged. The first part 500 and the second part 230 of the inner core are demarcated at the narrowest place of the ankle (as shown in 320a and 550). By providing a detachable inner core, it is avoided that when the first part 500 of the inner core is demolded from the upper mold 200, the first part 500 is stuck in the upper mold 200, so as to ensure that the finished product can be smoothly demolded;

[0044] As Figure 9 shown, the upper cover plate 300 is formed in a square body structure;

[0045] A plurality of ejector rods 330 are arranged on the upper end surface of the upper cover plate 300, and the ejector rods 330 are vertically arranged; further, the second part 320 of the inner core is arranged on the lower end surface of the upper cover plate 300, and the second part 320 of the inner core extends vertically downward,

[0046] When pressure is applied to the ejector rods 330, one end of the ejector rods 330 can pass through the upper cover plate 300 and the second part 230 of the inner core to reach the upper end of the first part 500;

[0047] As Figure 2 shown, the middle plate 400 is formed in a square body structure, and two or more limiting grooves 410a are provided on the upper end surface of the middle plate 400.

[0048] Specifically, as Figure 2 shown, the bottom mold 100 is formed in a cuboid or cube structure, and two or more placement grooves 110 are formed on the upper end surface of the bottom mold 100, and the structure of the placement groove 110 is similar to the shape of the sole;

[0049] Furthermore, the shape of the middle plate 400 is the same as that of the bottom mold 100. The lower end surface of the middle plate 400 is disposed above the bottom mold 100 and is arranged in a fitting manner with the bottom mold 100.

[0050] Among them, a limiting groove 410a corresponding to the placement groove 110 is provided on the upper end surface of the middle plate 400.

[0051] As Figure 7 shown, the upper mold 200 is formed into a through structure 210a. The lower end surface of the upper mold 200 is in contact with the upper end surface of the middle plate 400 to form a placement space 260.

[0052] Furthermore, the first part 500 and the second part 230 of the inner core are arranged in the placement space 260 formed when the upper mold 200 and the middle plate 400 are combined.

[0053] Among them, the outer edges of the first part 500 and the second part 230 of the inner core form a cavity 250 for the thermoplastic material to flow with the inner wall of the placement space 260. Among them, the space of the cavity 250 can be set to 1 mm - 5 mm.

[0054] As Figure 6 shown, the upper cover plate 300 is arranged on the upper end surface of the upper mold 200. The second part 320 of the inner core is arranged on the lower end surface of the upper cover plate 300. As Figure 9 shown, it protrudes axially along the upper cover plate 300.

[0055] As Figure 7 shown, the second part 320 of the inner core is embedded in the inner cavity structure or the through structure 210a of the upper mold 200.

[0056] Among them, as Figure 9 shown, a plurality of vertically arranged ejector rods 330 are provided on the upper end surface of the upper cover plate 300.

[0057] One end of the ejector rod 330 passes through the upper mold 200 and extends into the first part 500 of the inner core.

[0058] Specifically, by simulating the leg-to-foot structure of the human body for the first part 500 and the second part 320 of the inner core, and placing the formed first part 500 and the second part 320 of the inner core into the placement space 260 formed when the upper mold 200 and the middle plate 400 are combined, after closing the mold, a closed annular shoe body forming space (260, 170) is formed between the bottom mold 100, the upper mold 200 and the middle plate 400.

[0059] When manufacturing shoes, a thermoplastic material (such as rubber, foamed rubber, thermoplastic elastomer or ethylene-vinyl acetate copolymer) is injected or placed into the shoe body forming space (260, 170), and after vulcanization and shaping, a finished shoe is formed.

[0060] The formed bottom mold 100, upper mold 200 and middle plate 400 form a shoe body space 260. The upper end surface of the bottom mold 100 and the middle plate 400 are combined to form a hollow sole space 170. The shoe body space 260 and the sole space 170 are communicated to form a shoe body forming cavity 250. The shoe body rubber material is injected into the shoe body space 260 and vulcanized and formed to form the shoe body of the finished shoe. By injecting or placing the sole rubber material into the sole space 170, the sole of the finished shoe is formed through vulcanization and molding;

[0061] As Figure 7 shown, when demolding, the bottom mold 100 and the middle plate 400 are separated from the upper mold 200. One end of the ejector rod 330 ejects the first part 500 of the inner core along the axis of the upper mold 200, so that the first part 500 of the inner core and the second part 320 are separated from the upper mold 200.

[0062] Specifically, since the rubber material is sleeved with the forming inner mold after vulcanization and shaping, in order to facilitate the demolding operation, after the mold is opened, the forming inner mold (inner core and forming shoe upper) can be ejected downward from the upper mold 200, so that the formed finished shoe is exposed outside, thus facilitating the demolding operation.

[0063] Using this technical solution, by arranging a plurality of ejector rods 330 on the upper end surface of the upper cover plate 300, when demolding, first separate the bottom mold 100 and the middle plate 400 from the disassembled upper mold 200 to separate the formed sole. One end of the ejector rod 330 is ejected along the bottom side of the axis of the upper mold 200 by high pressure, so that the first part 500 of the inner core and the second part 320 are separated from the upper mold 200, thereby improving the reliability and convenience of mold opening.

[0064] In some embodiments, as Figure 2 shown, in order to improve the performance of the finished shoe sole, a plurality of groups of keels 110a arranged radially or axially can be arranged in the placement groove 110. Among them, the keels 110a are staggered in the placement groove 110, and the inner bottom of the inner mold is several different grooves, such as grids.

[0065] Among them, the placement groove 110 is used to place the sole to be formed;

[0066] That is, the sole rubber material is injected or placed into the sole space 170, and the sole of the finished shoe is formed through vulcanization and molding, and different patterns are formed on the sole.

[0067] In some embodiments, as Figure 5 or Figure 6 shown, the first part 500 of the inner core includes a leg area simulating the human body shape, that is, an ankle area and a foot area simulating the human body shape;

[0068] The first portion 500 of the inner core is L-shaped when viewed from the side. Since the human foot is thinnest at the ankle and becomes thicker from the ankle upwards, in order to make the shoe fit the foot, a curvature matching the foot needs to be set at the ankle. Since the shoe has a curvature at the ankle, it is not conducive to the peeling of the finished shoe during the demolding process.

[0069] The first portion 500 and the second portion 320 of the inner core are provided with two through holes (not shown) and a feed through hole (not shown);

[0070] like Figure 7 As shown, a through hole (not shown) passes through the first portion 500 and the second portion 320 of the inner core, so that one end of the push rod 330 abuts against the upper edge of the first portion 500 of the inner core through the through hole (not shown);

[0071] Among them, the first part 500 of the inner core includes the part of the human leg with the most protruding curvature. The first part 500 concentrates the outward convex curvature. The first part 500 of the inner core does not need to be separated from the upper mold 200. When opening the mold, it is only necessary to press the first part 500 of the inner core with the push rod 330 to push it out. The finished shoe is separated from the upper mold 200 together with the first part 500 and the second part 320 of the inner core, thereby facilitating the demoulding operation and avoiding damage to the finished shoe during demoulding, thereby improving the yield rate.

[0072] In some embodiments, as Figure 7 As shown, at least one injection pipe 360 is arranged between the ejector pins 330. The injection pipe 360 is axially arranged and passes through the upper mold 200, the first part 500 of the inner core, the second part 320 and the middle plate 400. The vertically arranged injection pipe 360 can realize injection from top to bottom.

[0073] like Figure 5 As shown, one end of the injection pipe 360 is connected to the through hole 340 on the upper end surface of the upper cover plate 300.

[0074] The other end of the injection pipe 360 extends to the upper end surface of the bottom mold 100 through the feeding holes (not shown) on the first part 500 and the second part 320 of the inner core to inject material into the bottom mold 100 and the first part 500 and the second part 320 of the inner core.

[0075] like Figure 8 As shown, a staggered and raised keel 520 is provided at the bottom of the first portion 500 of the inner core, and a groove body (not shown) is provided on the inner side of the keel 520;

[0076] like Figure 6As shown, a discharge hole 510 is provided in the middle section at the bottom of the first part 500 of the inner core. The other end of the injection material pipeline 360 extends to the upper end surface of the bottom die 100 through a feed through hole (not shown) on the first part 500 of the inner core and the discharge hole 510.

[0077] In some embodiments, as Figure shown, one end of the injection material pipeline 360 is provided on the upper end surface of the upper cover plate 300. One end of the injection material pipeline 360 passes through the upper cover plate 300, the upper die 200 and the middle plate 400, and extends to the upper end surface of the bottom die 100.

[0078] Wherein, a positioning member (not shown) and a through hole (not shown) are provided in the inner cavity of the second part 320 of the inner core.

[0079] The positioning member (not shown) abuts against one end of the ejector rod 330.

[0080] One end of the injection material pipeline 360 extends to the second part 320 of the inner core through a through hole (not shown). The injection material pipeline 360 communicates with the shoe body space 260 from the bottom of the shoe body space, so that the glue inlet is located at the bottom of the shoe body space. After the mold is closed, the shoe body rubber material and the sole rubber material are combined, thereby hiding the glue inlet between the shoe body and the sole.

[0081] Specifically, the formed inner mold (corresponding to the inner core) is divided into a first part 500 and a second part 320, so that the height of the produced shoe will not be affected by the required radian of the shoe. In actual operation, shoes of different heights can be produced according to actual needs, such as low-top shoes, knee-high boots or over-the-knee boots, making the mold more practical.

[0082] In some embodiments, as ​ shown, the bottom of the first part 500 of the inner core is arranged in a fitting manner with the middle plate 400 to support the first part 500 of the inner core.

[0083] Wherein, the middle plate 400 is used for color separation and stabilizing the first part 500 of the inner core.

[0084] As ​ shown, staggered keels 410a are arranged in the limiting groove 410 in the middle plate 400, and the keels 410a in the limiting groove 410 correspond to the keels 110a in the placing groove 110.

[0085] A clamping member 420 and a protruding member 430 are arranged on the outer extension of the upper end surface of the middle plate 400.

[0086] As ​ shown, symmetric notches (not shown) and concavities (not shown) are provided on the lower end surface of the upper die 200.

[0087] When the middle plate 400 is engaged with the upper die 200, the positioning member 420 and the protruding member 430 are respectively inserted into a notch (not shown) and a recess (not shown) to be fixed to the lower side of the upper die 200.

[0088] When the middle plate 400 separates the shoe body space and the sole space, the positioning member 420 and the protruding member 430 on the middle plate 400 are engaged and connected with the first part 500 of the inner core, so as to fix the first part 500 of the formed inner core and prevent a certain part of the finished shoe from being too thin or too thick due to the shaking of the first part 500 of the inner core during the injection molding process.

[0089] In some embodiments, as ​ shown, cavities or mold cavities 250 are provided at the bottom edge of the first part 500 of the inner core and the middle plate 400. After injection molding, a certain edge (such as 1 mm - 5 mm) is formed between the first part 500 of the inner core and the bottom edge of the unbonded shoe upper, making it easy to firmly bond the first part 500 of the inner core to the bottom.

[0090] Among them, plastic is injected into the cavities or mold cavities 250 and cooled to form a model 600.

[0091] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope of the present invention as protected by the claims. These all fall within the protection scope of the present invention.

Claims

1. A shoe forming device, characterized in that, Comprising: A bottom mold, which is formed into a square body structure, and at least one placement groove is formed on its upper end surface; A middle plate, which is arranged above the bottom mold, and a limiting groove corresponding to the placement groove is arranged on the upper end surface of the middle plate; An upper mold, which is formed into a through structure, and its lower end surface is attached to the upper end surface of the middle plate to form a placement space; An upper cover plate, the lower end of which is arranged on the upper end surface of the upper mold; An inner core, which is arranged into a first part and a second part, The first part of the inner core is arranged in the placement space, The second part of the inner core is arranged on the lower end surface of the upper cover plate, wherein, The outer edges of the first part and the second part of the inner core and the inner wall of the placement space form a cavity for flowing thermoplastic material; Wherein, a plurality of ejector rods are arranged on the upper end surface of the upper cover plate, and the ejector rods pass through the upper mold and extend into the inner core; During demolding, the bottom mold and the middle plate are separated from the upper mold, and the ejector rods push out the bottom of the inner core along the axis of the upper mold, so that the first part and the second part of the inner core are separated from the upper mold.

2. The shoe molding device according to claim 1, wherein The first part and the second part of the inner core are separable.

3. The shoe molding device according to claim 1, wherein A keel is arranged radially or axially in the placement groove.

4. The shoe molding device according to claim 2, wherein The placement groove is used for placing the sole to be molded.

5. The shoe molding device according to claim 1, wherein At least one injection pipe is arranged between the ejector rods, The injection pipe is axially arranged on the upper cover plate, and injection can be realized from top to bottom through the injection pipe.

6. The shoe molding device according to claim 5, wherein One end of the injection pipe is arranged on the upper end surface of the upper cover plate, One end of the injection pipe passes through the upper cover plate, the upper mold and the middle plate and extends to the upper end surface of the bottom mold.

7. The shoe molding device according to claim 6, wherein The upper cover plate and the second part of the inner core are integrally arranged.

8. The shoe molding device according to claim 7, wherein The bottom of the first part of the inner core is attached to the middle plate to support the first part of the inner core.

9. The shoe molding device according to claim 8, wherein Holes are provided between the bottom edge of the first part of the inner core and the middle plate.

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