Shoe forming equipment

Abstract

The utility model relates to the technical field of molds, and discloses shoe molding equipment with higher demolding reliability, which comprises an upper cover plate (300) with a square structure, at least two material injection pipelines (240) are arranged in the upper cover plate (300), one end of each material injection pipeline (240) extends to the top of the upper cover plate (300), the other end of each material injection pipeline (240) extends to the lower end along the axial direction of the upper cover plate (300), and the upper cover plate (300) and the material injection pipelines (240) are arranged in the upper cover plate (300). And materials are injected from top to bottom through the material injection pipeline (240).

Description

Technical Field

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

[0002] Shoe molds are relatively common in the shoe-making industry. They are usually used to make shoe uppers or soles. The injection molding method of one-piece shoes is adopted. Thermoplastic materials such as rubber, foamed rubber, thermoplastic elastomer or ethylene-vinyl acetate copolymer are injection molded in a mold through an injection molding machine. The molding mold usually includes a core and an outer mold.

[0003] At present, one-piece shoes usually adopt the method of injecting glue from the left or right side for injection molding. The gate position can be flexibly selected to improve the mold filling condition, and it can be corrected without removing the mold from the pouring machine, and it is convenient to remove the gate. However, when injecting glue from the left or right side, due to the large loss of injection pressure, the exhaust of the finished plastic part is poor, which may cause defects such as weld lines, lock holes, and depressions in the finished product. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a shoe forming device with a reliable glue injection method for the above-mentioned defects of the prior art, that is, due to the large loss of injection pressure, the exhaust of the finished plastic part is poor, which may cause defects such as weld lines, lock holes, and depressions in the finished product.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to construct a shoe forming device, which includes an upper cover plate with a square structure.

[0006] At least two injection pipes are arranged inside the upper cover plate.

[0007] One end of the injection pipe extends to the top of the upper cover plate.

[0008] The other end of the injection pipe extends axially to the lower end along the upper cover plate, and the material is injected from top to bottom through the injection pipe.

[0009] In some embodiments, it further includes a bottom mold, a middle plate, an upper mold and an inner core. Among them,

[0010] The inner core includes a first part and a second part that are separately arranged.

[0011] The bottom mold, the middle plate, the first part and the second part of the inner core, and the upper mold are stacked from bottom to top.

[0012] The upper cover plate is arranged on the upper end surface of the upper mold.

[0013] One end of the injection pipeline passes through the upper mold, the first part and the second part of the insert, and the middle plate and extends to the upper end surface of the bottom mold.

[0014] In some embodiments, the second part of the insert is arranged on the lower end surface of the upper cover plate.

[0015] The second part of the insert is embedded in the inner cavity structure of the upper mold.

[0016] 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 the second part of the insert and extend into the first part of the insert.

[0017] In some embodiments, a plurality of ejector rods are arranged on the upper end surface of the upper cover plate, and one end of the ejector rods can pass through the upper mold and the second part of the insert and extend into the first part of the insert.

[0018] In some embodiments, at least one placement groove is formed on the upper end surface of the bottom mold.

[0019] Radial or axial keels are arranged in the placement groove.

[0020] In some embodiments, a limiting groove corresponding to the placement groove is arranged on the upper end surface of the middle plate.

[0021] Radial or axial keels are arranged in the limiting groove.

[0022] In some embodiments, the first part of the insert is arranged in the placement space, and a cavity for flowing thermoplastic material is formed between the outer edge of the first part of the insert and the inner wall of the placement space.

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

[0024] In some embodiments, the lower end surface of the middle plate is attached to the bottom of the first part of the insert to support the first part of the insert.

[0025] In some embodiments, cavities are provided at the bottom edge of the first part of the insert and the upper end of the middle plate.

[0026] In the shoe - forming equipment of the present utility model, it includes an upper cover plate with a square structure. At least two injection pipes are arranged inside the upper cover plate. One end of the injection pipe extends to the top of the upper cover plate, and the other end of the injection pipe extends axially downward along the upper cover plate, and the injection is carried out from top to bottom through the injection pipe. Compared with the prior art, by arranging two injection pipes inside the upper cover plate and injecting plastic into the shoe mold (or cavity) to be formed through the injection pipes, the plastic flows along the outer extension of the shoe mold to form a shoe. It can effectively solve the problems that when injecting glue from the left or right side, due to large injection pressure loss, the exhaust of the finished plastic part is poor, which may lead to the formation of weld marks, lock holes, and depressions in the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present utility model 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 equipment provided by the present utility model;

[0029] Figure 2 is an exploded view of an embodiment of the shoe - forming equipment provided by the present utility model;

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

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

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

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

[0034] Figure 7 is a demolding schematic diagram of an embodiment of the shoe - forming equipment provided by the present utility model;

[0035] Figure 8 is a demolding schematic diagram of another embodiment of the shoe - forming equipment provided by the present utility model;

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

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

[0038] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings.

[0039] As Figures 1 - 6 shown, in the first embodiment of the shoe forming device of the present utility model, the shoe forming 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] As Figure 5 shown, a fitting portion similar to the curvature of the instep is formed on the bottom surface of the upper mold 200;

[0044] 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;

[0045] Among them, the inner core includes a first part 500 and a second part 230. The first part 500 and the second part 230 are separable. The first part 500 and the second part 230 of the inner core are demarcated at the narrowest part of the ankle (as shown in 320a and 550). By setting the separable 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, thus ensuring that the finished product can be smoothly demolded;

[0046] As Figure 9 shown, the upper cover plate 300 is formed in a square body structure;

[0047] A plurality of ejector rods 330 are provided 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 provided on the lower end surface of the upper cover plate 300, wherein the second part 320 of the inner core extends vertically downward,

[0048] When pressure is applied to the ejector rod 330, one end of the ejector rod 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;

[0049] As Figure 2 shown, the middle plate 400 is formed into a square body structure, and two or more limiting grooves 410a are provided on the upper end surface of the middle plate 400.

[0050] Specifically, as Figure 2 shown, the bottom mold 100 is formed into a cuboid 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 a shoe sole;

[0051] Among them, as Figure 4 shown, at least two injection pipelines 360 are arranged inside the upper cover plate 300. As Figure 5 and Figure 7 shown, the injection pipelines  360 are in the injection state;

[0052] The injection pipelines 360 are axially arranged inside the upper cover plate 300,

[0053] One end of the injection pipeline 360 extends to the top of the upper cover plate 300. As Figure 9 shown, an injection hole 340 is formed at the top of the upper cover plate 300, or is connected to the injection hole 340 on the upper end surface of the upper cover plate 300.

[0054] The other end of the injection pipeline 360 extends axially downward along the upper cover plate 300, passes through the upper mold 200, the second part 230 of the inner core, the first part 500, and the middle plate 400 and extends to the upper end surface of the bottom mold 100. Injection from top to bottom can be realized through the injection pipeline 360 to inject materials onto the outer extensions of the bottom mold 100 and the first part 500 and the second part 320 of the inner core.

[0055] Among them, the injection pipeline 360 communicates with the shoe body space 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;

[0056] 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 footwear will not be affected by the required arc of the footwear. In actual operation, footwear of different heights, such as low-top shoes, thigh-high boots or over-the-knee boots, can be produced according to actual needs, making the mold more practical.

[0057] Specifically, by simulating the leg-to-foot structure of the human body with the first part 500 and the second part 320 of the inner core, and placing the first part 500 and the second part 320 of the formed 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.

[0058] 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;

[0059] 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 forming cavity 250. The shoe body rubber material is injected into the shoe body space 260, and after vulcanization and shaping, the shoe body of the finished shoe is formed. By injecting or placing the sole rubber material into the sole space 170, the sole of the finished shoe is formed after vulcanization and shaping;

[0060] 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 and the second part 320 of the inner core are separated from the upper mold 200.

[0061] Specifically, since the rubber material is sleeved with the formed inner mold after vulcanization and shaping, in order to facilitate the demolding operation, after opening the mold, the formed inner mold (inner core and formed shoe upper) can be ejected downward from the upper mold 200, so that the formed finished shoe is exposed, thus facilitating the demolding operation.

[0062] Using this technical solution, by arranging two injection pipes 360 in the upper cover plate 300, and injecting plastic into the shoe mold to be formed through the injection pipes 360, the plastic flows along the outer extension of the shoe mold to form a shoe, which can effectively solve the problems that when injecting glue from the left or right side, due to large injection pressure loss, the exhaust of the finished plastic part is poor, and it may cause weld marks, lock holes, and depressions in the finished product.

[0063] In some embodiments, as Figure 2 shown, the bottom mold 100 is formed into 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;

[0064] Further, a plurality of sets of radially or axially arranged keels 110a are provided in the placement groove 110, wherein the keels 110a are staggered in the placement groove 110, and the inner membrane bottom is several different grooves, such as, lattices.

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

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

[0067] Further, 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 arranged above the bottom mold 100 and is arranged in close fit with the bottom mold 100.

[0068] Among them, a limiting groove 410a corresponding to the placement groove 110 is provided on the upper end surface of the middle plate 400;

[0069] Further, the upper mold 200 (belonging to the upper mold 200) is formed into a through structure 210a. The lower end surface of the upper mold 200 is in close fit with the upper end surface of the middle plate 400 to form a placement space;

[0070] Further, the first part 500 of the inner core is arranged in the placement space formed when the upper mold 200 and the middle plate 400 are combined. Among them, the outer edge of the first part 500 of the inner core and the inner wall of the placement space form a cavity 250 for the flowable thermoplastic material. Among them, the space of the cavity 250 can be set to 1 mm - 5 mm.

[0071] Such as 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 Figure 9 shown, it protrudes axially along the upper cover plate 300;

[0072] Such 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;

[0073] 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;

[0074] One end of the ejector rod 330 passes through the upper mold 200 and extends into the first part 500 of the inner core;

[0075] Specifically, by simulating the leg-to-foot structure of the human body with the first part 500 and the second part 320 of the inner core, and placing the formed first part 500 and 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.

[0076] In some embodiments, as Figure 9 shown, a plurality of axially arranged ejector rods 330 are provided on the upper end surface of the upper cover plate 300, and the injection pipe 360 is arranged between two ejector rods 330. Among them, any injection pipe 360 penetrates through the upper mold 200, the first part 500 and the second part 320 of the inner core, and the middle plate 400, and injection is realized from top to bottom through the injection pipe 360.

[0077] As Figure 8 shown, staggered and protruding keels 520 are provided at the bottom of the first part 500 of the inner core, and a groove (not shown) is provided inside the keels 520;

[0078] As Figure 6 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 a feed through hole (not shown) and the discharge hole 510 on the first part 500 of the inner core.

[0079] In some embodiments, as Figure 2 shown, in order to improve the performance of the finished shoe sole, a plurality of groups of radially or axially arranged keels 110a can be provided in the placement groove 110. Among them, the keels 110a are staggered in the placement groove 110, and the inner membrane bottom has several different grooves, such as grids.

[0080] Among them, the placement groove 110 is used to place the sole to be formed;

[0081] That is, the sole rubber is injected or placed into the sole space 270, and after vulcanization molding, the sole of the finished shoe is formed, and different patterns are formed on the sole.

[0082] In some embodiments, as Figure 5 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;

[0083] The first part 500 of the inner core is in an "L" shape when viewed from the side. Since the human foot is the thinnest at the ankle and thickens upward from the ankle, 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 formed finished shoe during the demolding process.

[0084] As shown Figure 7 in Figure 7 , a through hole (not shown) penetrates through the interior of the first part 500 and the second part 320 of the inner core, such that one end of the ejector rod 330 abuts against the upper edge of the first part 500 of the inner core through the through hole (not shown);

[0085] Among them, the first part 500 of the inner core contains the part with the most protruding arc of the human leg. The first part 500 concentrates the outward protruding arc. The first part 500 of the inner core does not need to be separated from the upper mold 200. During mold opening, only the ejector rod 330 needs to press down the first part 500 of the inner core and eject it. The finished shoe will be separated from the upper mold 200 together with the first part 500 and the second part 320 of the inner core, thus facilitating the demolding operation, avoiding damage to the finished shoe during demolding, and further improving the yield rate.

[0086] In some embodiments, as shown Figure 4 in Figure 4 , the bottom of the first part 500 of the inner core is arranged in close fit with the middle plate 400 to support the first part 500 of the inner core.

[0087] Among them, the middle plate 400 is used for color separation and stabilizing the first part 500 of the inner core.

[0088] As shown Figure 2 in Figure 2 , 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 placement groove 110;

[0089] 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;

[0090] As shown Figure 2 in Figure 2 , symmetric notches (not shown) and recesses (not shown) are provided on the lower end surface of the upper mold 200,

[0091] When the middle plate 400 is matched with the upper mold 200, the clamping member 420 and the protruding member 430 are respectively embedded into the notches (not shown) and recesses (not shown) to be fixed on the lower side of the upper mold 200.

[0092] When the middle plate 400 separates the shoe body space and the sole space, the clamping member 420 and the protruding member 430 on the middle plate 400 are cooperatively connected with the first part 500 of the inner core, thereby playing a role in fixing the formed first part 500 of the inner core and avoiding the thickness of a certain part of the finished shoe being too thin or too thick due to the shaking of the first part 500 of the inner core during the injection molding process.

[0093] In some embodiments, as shown Figure 5As shown, a cavity or mold cavity 250 is 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 unbonded bottom edge of the upper, making it easy to firmly bond the first part 500 of the inner core to the bottom.

[0094] Among them, the plastic is injected into the cavity or mold cavity 250 and cooled to form a model 600.

[0095] 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 purpose of the present invention and the scope protected by the claims. These all fall within the protection scope of the present invention.

Claims

1. A shoe molding device, characterized in that, including an upper cover plate with a square structure, at least two injection pipes are arranged inside the upper cover plate, one end of the injection pipe extends to the top of the upper cover plate, the other end of the injection pipe extends axially to the lower end along the upper cover plate, and the material is injected from top to bottom through the injection pipe.

2. The shoe molding device according to claim 1, characterized in that, it further includes a bottom mold, a middle plate, an upper mold and an inner core. Among them, the inner core includes a first part and a second part arranged separately, the bottom mold, the middle plate, the first part of the inner core, the second part and the upper mold are stacked from bottom to top, the upper cover plate is arranged on the upper end surface of the upper mold, one end of the injection pipe passes through the upper mold, the first part and the second part of the inner core, and the middle plate and extends to the upper end surface of the bottom mold.

3. The shoe molding device according to claim 2, characterized in that, the second part of the inner core is arranged on the lower end surface of the upper cover plate, the second part of the inner core is embedded in the inner cavity structure of the upper mold, 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 the second part of the inner core and extend into the first part of the inner core.

4. The shoe molding device according to claim 3, characterized in that, a plurality of ejector rods are arranged on the upper end surface of the upper cover plate, and one end of the ejector rod can pass through the upper mold and the second part of the inner core and extend into the first part of the inner core.

5. The shoe molding device according to claim 4, characterized in that, at least one placement groove is formed on the upper end surface of the bottom mold, a keel arranged radially or axially is arranged in the placement groove.

6. The shoe molding device according to claim 5, characterized in that, a limiting groove corresponding to the placement groove is arranged on the upper end surface of the middle plate, a keel arranged radially or axially is arranged in the limiting groove.

7. The shoe molding device according to claim 5, characterized in that, the first part of the inner core is arranged in a placement space, and a cavity for flowing thermoplastic material is formed between the outer edge of the first part of the inner core and the inner wall of the placement space.

8. The shoe molding device according to claim 5, characterized in that, the upper cover plate and the second part of the inner core are integrally arranged.

9. The shoe molding device according to claim 8, characterized in that, the lower end surface of the middle plate is attached to the bottom of the first part of the inner core to support the first part of the inner core.

10. The shoe molding device according to claim 9, characterized in that, cavities are provided at the bottom edge of the first part of the inner core and the upper end of the middle plate.

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