Footwear forming mold

Abstract

The utility model relates to the technical field of dies, and discloses a shoe forming die with higher stability, which comprises a bottom die (100), at least one placing groove is formed on the upper end surface of the bottom die (100); the middle plate (400) is arranged above the bottom die (100), and a limiting groove corresponding to the containing groove is formed in the upper end face of the middle plate (400); the lower end face of the upper die (200) is attached to the upper end face of the middle plate (400), and a containing space is formed; the inner core (500, 320) is provided with a first part and a second part, and the outer edges of the first part and the second part of the inner core and the inner wall of the placing space form a mold cavity (250) in which a flowable thermoplastic material can flow; a keel is arranged in the containing groove in the radial direction or the axial direction, a cavity is formed between the edge of the bottom of the first part of the inner core and the middle plate, and the cavity is arranged to be 1 mm-5 mm.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to a shoe forming mold. Background Art

[0002] Shoe molds are a common setting in the shoemaking industry. They are usually used to make uppers or soles. The injection molding method of one-piece shoes is adopted. Thermoplastic materials such as rubber, foam rubber, thermoplastic elastomer or ethylene-vinyl acetate copolymer are injection molded in an injection molding mold through an injection molding machine. The molding mold usually includes a core and an outer mold. The shape of the core matches the outer mold to form an annular closed cavity, which is the molding position of the one-piece shoe.

[0003] However, during the injection molding process, the bottom of the inner film (or core) is in direct contact with the base plate, which supports the stability of the inner film. Since the core and outer mold need to repeat the injection molding process many times, the base plate cannot ensure that the inner film (or core) does not shake during the injection molding process. After the injection molding is completed, it may cause the thickness of each part to be uneven. Utility Model Content

[0004] The technical problem to be solved by the present invention is that, in the prior art, the bottom of the inner membrane (or core) is in direct contact with the bottom plate, and the stability of the inner membrane is supported by the bottom plate. Since the core and the outer mold need to be injection molded multiple times, the bottom plate cannot ensure that the inner membrane (or core) does not shake during the injection molding process. After the injection molding is completed, it may cause the defect of uneven thickness of each part. A shoe molding mold with higher stability is provided.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a shoe forming mold 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] The upper mold is formed into a through structure, and the lower end surface of the upper end surface of the upper mold is arranged to fit the upper end surface of the middle plate to form a placement space;

[0009] The inner benevolence is set up as the first and second parts,

[0010] The first part of the inner core is arranged in the placement space,

[0011] The second part of the inner core is arranged on the lower end surface of the upper cover plate, wherein,

[0012] The outer edges of the first and second parts of the inner core and the inner wall of the placement space form a mold cavity for the flowable thermoplastic material;

[0013] A radially or axially arranged keel is provided in the placement groove;

[0014] A cavity is provided between the bottom edge of the first portion of the inner core and the middle plate.

[0015] The cavity is set to 1mm-5mm.

[0016] In some embodiments, the keel is in a groove structure.

[0017] In some embodiments, the placement groove is used to place the sole to be formed.

[0018] In some embodiments, a plurality of push rods are provided on the upper end surface of the upper cover plate, and the push rods pass through the upper mold and the second portion of the inner core and extend to the upper end of the first portion of the inner core.

[0019] In some embodiments, at least one injection pipe is provided between the ejector pins. The injection pipe is axially arranged, and the injection is performed from top to bottom through the injection pipe.

[0020] In some embodiments, one end of the injection pipe is arranged on the upper end surface of the upper cover plate.

[0021] 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.

[0022] In some embodiments, the upper cover plate is integrally formed with the second portion of the inner core.

[0023] In some embodiments, the upper end surface of the middle plate is arranged to fit the bottom of the first part of the inner core to support the first part of the inner core.

[0024] The shoe molding mold described in this utility model comprises a base mold, a middle plate, an upper mold, an inner core, and an upper cover plate. The outer edges of the first and second portions of the inner core and the inner wall of the placement space form a mold cavity for flowable thermoplastic material. A radially or axially arranged keel is provided within the placement groove. A cavity with a diameter of 1mm to 5mm is provided between the bottom edge of the first portion of the inner core and the middle plate. Compared to existing technologies, the middle plate provides reliable support for the inner core, effectively resolving the problem of multiple injection molding cycles between the core and outer mold, where the base plate cannot prevent the inner mold (or core) from shaking during the injection molding process, potentially leading to uneven thickness distribution across different parts after injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 This is a three-dimensional diagram of an embodiment of a shoe forming mold provided by the present utility model;

[0027] Figure 2 This is an exploded view of an embodiment of a shoe forming mold provided by the present utility model;

[0028] Figure 3 This is a cross-sectional view of an embodiment of a shoe forming mold provided by the present utility model;

[0029] Figure 4 This is a cross-sectional view of another embodiment of the shoe forming mold provided by the present utility model;

[0030] Figure 5 This is a cross-sectional view of another embodiment of the shoe forming mold provided by the present invention;

[0031] Figure 6 This is a cross-sectional view of another embodiment of the shoe forming mold provided by the present invention;

[0032] Figure 7 This is a schematic diagram of demoulding of a shoe forming mold provided by the present invention;

[0033] Figure 8 This is another schematic diagram of demoulding of the shoe forming mold provided by the present invention;

[0034] Figure 9 This is a three-dimensional diagram of an embodiment of an upper cover provided by the present utility model;

[0035] Figure 10 yes Figure 3 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0037] like Figure 1-Figure 7 As shown, in the first embodiment of the shoe forming mold of the present invention, the shoe forming mold 10 includes a bottom mold 100, an upper mold 200, an upper cover plate 300, a middle plate 400 and an inner core (320, 500);

[0038] Among them, Figure 2 As shown, the bottom mold 100 is formed into a square body structure, and two or more placement grooves 110 are formed on the upper end surface of the bottom mold 100, and the placement grooves 110 are used to place the soles to be formed;

[0039] A radially or axially arranged keel 110a is provided in the placement groove 110.

[0040] The keels 110a are staggeredly arranged in the placement grooves 110, and the inner membrane bottom (corresponding to the placement grooves 110) is formed into several different grooves, such as a grid;

[0041] Wherein, the keel 110a is a groove structure;

[0042] 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;

[0043] like Figure 3 and Figure 10 As shown, the upper mold 200 is formed into a square body structure, and the upper mold 200 is provided with an upper and lower through-structure 210a, and the through-structure 210a can be understood as a mold cavity 250, a product molding area;

[0044] like Figure 7 As shown, a fitting portion similar to the curvature of the foot is formed on the bottom surface of the upper mold 200;

[0045] like Figure 4 As shown, the inner core (320, 500) is provided as two (i.e., left / right foot) to simulate the leg-to-foot structure of the human body;

[0046] The inner core includes a first portion 500 and a second portion 230, and the first portion 500 and the second portion 230 can be separated.

[0047] The first portion 500 and the second portion 230 of the inner core are separated at the narrowest part of the ankle (as shown by 320a and 550). By providing a separable inner core, the first portion 500 of the inner core is prevented from getting stuck in the upper mold 200 during demolding, thereby ensuring smooth demolding of the finished product.

[0048] like Figure 9 As shown, the upper cover plate 300 is formed into a square structure;

[0049] A plurality of push rods 330 are provided on the upper end surface of the upper cover plate 300, and a second portion 320 of the inner core extending downward is provided on the lower end surface of the upper cover plate 300;

[0050] When the push rod 330 is pressurized, one end of the push rod 330 can pass through the upper cover 300 and the second portion 230 of the inner core to reach the upper end of the first portion 500;

[0051] like Figure 4 As shown, the middle plate 400 is formed into a square body structure, and two or more limiting grooves 410 a are provided on the upper end surface of the middle plate 400 .

[0052] Specifically, the bottom mold 100 is formed into a rectangular parallelepiped or cube structure, and two or more placement grooves 110 are formed on the upper end surface of the bottom mold 100. The structure of the placement groove 110 is similar to the shape of the sole;

[0053] Furthermore, the shape of the middle plate 400 is the same as that of the bottom mold 100, and the lower end surface of the middle plate 400 is arranged above the bottom mold 100 and is fitted with the bottom mold 100;

[0054] The upper end surface of the middle plate 400 is provided with a limiting groove 410a corresponding to the placement groove 110;

[0055] like Figure 7 As shown, the upper mold 200 is formed into a through structure 210a, and the lower end surface of the upper mold 200 is fitted with the upper end surface of the middle plate 400 to form a placement space 260;

[0056] Furthermore, the first portion 500 and the second portion 230 of the inner core are disposed in the placement space 260 formed when the upper mold 200 and the middle plate 400 are combined;

[0057] The outer edges of the first portion 500 and the second portion 230 of the inner core and the inner wall of the placement space 260 form a mold cavity 250 for the flowable thermoplastic material, wherein the space of the mold cavity 250 can be set to 1mm-5mm;

[0058] like Figure 6 As shown, the upper cover plate 300 is arranged on the upper end surface of the upper mold 200, and the second part 320 of the inner core is arranged on the lower end surface of the upper cover plate 300, as shown in FIG. Figure 9 As shown, it protrudes axially along the upper cover plate 300;

[0059] The second portion 320 of the inner core is embedded in the inner hollow structure or the through structure 210a of the upper mold 200;

[0060] like Figure 9 As shown, a plurality of vertically arranged top rods 330 are provided on the upper end surface of the upper cover plate 300;

[0061] One end of the ejector pin 330 passes through the upper mold 200 and extends into the first portion 500 of the inner core;

[0062] There is a cavity between the bottom edge of the first part 500 of the inner core and the middle plate 400, and the cavity can be set to 1mm-5mm;

[0063] like Figure 5 As shown, a cavity or mold 250 is provided between the bottom edge of the first portion 500 of the inner core and the middle plate 400. After injection molding, a certain margin (e.g., 1 mm to 5 mm) is formed between the first portion 500 of the inner core and the bottom edge of the unbonded upper, making it easier for the first portion 500 of the inner core to be firmly bonded to the bottom.

[0064] The plastic is injected into the cavity or mold 250 and then cooled to form the mold 600 .

[0065] Specifically, the first part 500 and the second part 320 of the inner core simulate the leg and foot structure of the human body, and the first part 500 and the second part 320 of the inner core are placed in the placement space 260 formed when the upper mold 200 and the middle plate 400 are combined. After the molds are closed, a closed annular shoe body molding space (260, 170) is formed between the bottom mold 100, the upper mold 200 and the middle plate 400. When producing the shoe, a thermoplastic material (such as rubber, foam rubber, thermoplastic elastomer or ethylene-vinyl acetate copolymer) is injected or placed into the shoe body molding space (260, 170) and vulcanized and shaped to form a finished shoe.

[0066] 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 connected to form a shoe body molding cavity 250. The shoe body rubber material is injected into the shoe body space 260 and vulcanized to form the shoe body of the finished shoe. The sole rubber material is injected or placed into the sole space 170 and vulcanized to form the sole of the finished shoe.

[0067] like Figure 7 As shown, during demoulding, the bottom mold 100 and the middle plate 400 are separated from the upper mold 200, and 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 and the second part 320 of the inner core are separated from the upper mold 200.

[0068] Specifically, since the rubber material is in a sleeve shape with the inner mold after vulcanization and shaping, in order to facilitate the demolding operation, the inner mold (corresponding to the inner core and the molded upper) can be pushed downward from the upper mold 200 after the mold is opened, so that the molded finished shoe is exposed to the outside, thereby facilitating the demolding operation.

[0069] By using this technical solution, the middle plate 400 forms a reliable support for the first part 500 of the inner core, which can effectively solve the problem that the core and the outer mold need to be injection molded multiple times, and the bottom plate 100 cannot ensure that the inner film (or core) does not shake during the injection molding process, which may cause the thickness of each part (upper or shoe shaft) to be uneven after injection molding.

[0070] In some embodiments, as Figure 5 or Figure 6 As shown, the first portion 500 of the inner core includes a leg region that simulates the shape of a human body, that is, an ankle region and a foot region that simulate the shape of a human body;

[0071] The upper end surface of the middle plate 400 forms a spaced edge with the bottom edge of the first inner core 500 of the inner core;

[0072] The first inner core 500 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.

[0073] 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);

[0074] 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);

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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;

[0080] like Figure 6As shown, a discharge hole 510 is provided in the middle section of the bottom of the first part 500 of the inner core, and the other end of the injection pipe 360 extends to the upper end surface of the bottom mold 100 through the feed through hole (not shown) and the discharge hole 510 on the first part 500 of the inner core.

[0081] In some embodiments, as Figure 5 As shown, one end of the injection pipe 360 is set on the upper end surface of the upper cover plate 300 , and one end of the injection pipe 360 passes through the upper cover plate 300 , the upper mold 200 and the middle plate 400 and extends to the upper end surface of the bottom mold 100 .

[0082] A positioning member (not shown) and a through hole (not shown) are provided in the inner cavity of the second portion 320 of the inner core.

[0083] The positioning member (not shown) abuts against one end of the push rod 330.

[0084] One end of the injection pipe 360 extends through a through hole (not shown) to the second portion 320 of the inner core. The injection pipe 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 260. After the mold is closed, the shoe body rubber and the sole rubber are combined, thereby hiding the glue inlet between the shoe body and the sole.

[0085] Specifically, the 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 shoes will not be affected by the curvature required for the shoes. In actual operation, shoes of different heights can be produced according to actual needs, such as low-top shoes, long boots or over-the-knee boots, making the mold more practical.

[0086] In some embodiments, as Figure 4 As shown, the bottom of the first portion 500 of the inner core is fitted with the middle plate 400 to support the first portion 500 of the inner core.

[0087] The middle plate 400 is used for color separation and stabilizing the first portion 500 of the inner core.

[0088] like Figure 2 As shown, staggered keels 410a are provided in the limiting grooves 410 in the middle plate 400, and the keels 410a in the limiting grooves 410 correspond to the keels 110a in the placement grooves 110;

[0089] A locking member 420 and a protruding member 430 are provided on the outer extension of the upper end surface of the middle plate 400;

[0090] like Figure 2 As shown, a symmetrical notch (not shown) and an inner concave (not shown) are provided on the lower end surface of the upper mold 200;

[0091] When the middle plate 400 is mated with the upper mold 200 , the locking member 420 and the protruding member 430 are respectively embedded in the notch (not shown) and the inner recess (not shown) to be fixed to the lower side of the upper mold 200 .

[0092] When the middle plate 400 isolates the shoe body space and the sole space, the locking member 420 and the protruding member 430 on the middle plate 400 cooperate with and connect with the first part 500 of the inner core, thereby fixing the first part 500 of the molded inner core, avoiding the situation where the thickness of a certain part of the finished shoe is too thin or too thick due to the shaking of the first part 500 of the inner core during the glue injection process.

[0093] In some embodiments, as Figure 4 As shown, the bottom of the first portion 500 of the inner core is fitted with the middle plate 400 to support the first portion 500 of the inner core.

[0094] The middle plate 400 is used for color separation and stabilizing the first portion 500 of the inner core.

[0095] like Figure 2 As shown, staggered keels 410a are provided in the limiting grooves 410 in the middle plate 400, and the keels 410a in the limiting grooves 410 correspond to the keels 110a in the placement grooves 110;

[0096] A locking member 420 and a protruding member 430 are provided on the outer extension of the upper end surface of the middle plate 400;

[0097] like Figure 2 As shown, a symmetrical notch (not shown) and an inner concave (not shown) are provided on the lower end surface of the upper mold 200.

[0098] When the middle plate 400 is mated with the upper mold 200 , the locking member 420 and the protruding member 430 are respectively embedded in the notch (not shown) and the inner recess (not shown) to be fixed to the lower side of the upper mold 200 .

[0099] When the middle plate 400 isolates the shoe body space and the sole space, the locking member 420 and the protruding member 430 on the middle plate 400 cooperate with and connect with the first part 500 of the inner core, thereby fixing the first part 500 of the molded inner core, preventing the first part 500 of the inner core from shaking during the glue injection process, causing a certain part of the finished shoe to be too thin or too thick.

[0100] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A shoe forming mold, characterized in that: have: The bottom mold is formed into a square body structure and has at least one placement groove formed on its upper end surface; 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; The upper mold is formed into a through structure, and the lower end surface of the upper end surface of the upper mold is arranged to fit the upper end surface of the middle plate to form a placement space; The inner benevolence is set up as the first and second parts, 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 and second parts of the inner core and the inner wall of the placement space form a mold cavity for the flowable thermoplastic material; A radially or axially arranged keel is provided in the placement groove; A cavity is provided between the bottom edge of the first portion of the inner core and the middle plate. The cavity is set to 1mm-5mm.

2. The shoe forming mold according to claim 1, characterized in that: The keel is in a groove structure.

3. The shoe forming mold according to claim 1, characterized in that: The placement groove is used for placing the sole to be formed.

4. The shoe forming mold according to claim 3, characterized in that: 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 the second part of the inner core and extend to the upper end of the first part of the inner core.

5. The shoe forming mold according to claim 4, characterized in that: At least one injection pipe is arranged between the ejector pins. The injection pipe is axially arranged, and the injection from top to bottom is achieved through the injection pipe.

6. The shoe forming mold according to claim 5, characterized in that: 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 forming mold according to claim 6, characterized in that: The upper cover plate is integrally arranged with the second portion of the inner core.

8. The shoe forming mold according to claim 7, characterized in that: The upper end surface of the middle plate is arranged in contact with the bottom of the first part of the inner core to support the first part of the inner core.

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