Upper-connected injection mold
By designing a connected injection mold suitable for soles of complex structures, the problem that existing molds are difficult to be suitable for soles of complex structures is solved, and the efficient molding and comfort of soles are achieved.
Patent Information
- Application Number
- CN202421824045.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-30
AI Technical Summary
Existing continuous injection molds are difficult to adapt to sole production in complex configurations, such as leather shoe soles with prefabricated heels and the sole body is injection molded from different materials.
A connected injection mold is designed including a bottom mold assembly and a side mold assembly, on which the first and second cavity for forming the sole, the second cavity is used for inlay positioning with the prefabricated heel, and through the mating of the upper mold and the side mold, different types of injection molding materials are injected to form the whole of the sole and upper.
The mold can be effectively used for sole production in complex structures, improves the high temperature and wear resistance of the sole, and firmly combines the upper and sole through a second layer of injection molding, improving the softness and wear comfort of the sole.
Smart Images
Figure CN222875138U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a continuous injection mold. Background Art
[0002] Goodyear Welted construction, also known as Goodyear stitching, is a traditional shoemaking technique named after its inventor, Charles Goodyear Jr. This technique was developed by the Goodyear Company in the late 19th century and is still used by many high-end shoe manufacturers. The Goodyear Welted construction is characterized by adding a stitching strip called "welt" between the sole and the upper. The sole is usually made of one or more layers of leather, which is then stitched to the upper through the "welt" stitching strip.
[0003] The soles made by Goodyear process are made of genuine leather, which has good texture and beautiful appearance. However, the production of the soles is heavily dependent on manual labor, the production process is complicated, the labor cost is high, and the finished soles are heavy and have weak elastic cushioning performance, which affects the wearing comfort. In addition, the stitching between the soles and the uppers also requires manual operation.
[0004] The upper injection molding process is a modern shoemaking technology, which is mainly used to produce plastic shoes, rubber shoes and some other types of casual shoes. The main feature of this process is to directly inject the sole material into the mold and combine the molded sole and upper together.
[0005] At present, the existing upper injection mold usually includes a bottom mold and side molds located on both sides. The side molds are opened and closed on both sides of the bottom mold. The lower part of the side molds on both sides is closed with the bottom mold, and the upper part of the side molds on both sides is closed with the shoe last, so that a cavity for injection molding is formed between the bottom mold, the side mold and the shoe last. The traditional upper injection mold is only suitable for the manufacturing and molding of two types of soles. One type is to firmly combine the prefabricated sole with the upper through the adhesive layer of injection molding, and the other type is to directly injection mold the entire sole in the mold cavity, and firmly combine the sole and the upper together. The existing upper injection mold is difficult to be applied to the production of soles with complex structures, such as leather shoe soles with prefabricated heels and the main body of the sole is injection molded by different materials. Summary of the invention
[0006] The utility model provides an upper injection mould which is suitable for manufacturing leather shoe soles which have prefabricated heels and the main body of the soles is formed by injection moulding of different materials.
[0007] The utility model discloses a continuous upper injection mold, comprising a bottom mold component and a side mold component, wherein the side mold component comprises two side molds which can be opened and closed and are arranged on both sides of the bottom mold, the inner sides of the lower ends of the side molds are matched and closed with the side parts of the bottom mold component, and the inner sides of the upper ends of the side molds are used to match and close with the lower ends of the shoe lasts, the upper front end of the bottom mold component comprises a first concave cavity for molding the sole part of the shoe, the upper rear end of the bottom mold component comprises a second concave cavity for molding the heel part of the shoe, the second concave cavity is used to fit and fit with the prefabricated heel for positioning, the second concave cavity is surrounded by side walls for matching and contacting with the prefabricated heel, the upper end of the front side wall of the second concave cavity is adjacent to the rear end of the first concave cavity, and the mold further comprises an upper mold, and the lower end of the upper mold comprises a protrusion matching with the first concave cavity and the second concave cavity.
[0008] The steps and principles of the upper-connected injection mold for making the sole of the utility model are as follows: first, the prefabricated heel is inserted into the second cavity, the upper mold is lowered to the top of the bottom mold assembly, and then the side molds on both sides are closed, and the injection molding material with wear-resistant and high-temperature resistant properties (such as high-density polyurethane) is injected into the first cavity and the second cavity of the bottom mold assembly. The injection molding material can be injected into each cavity through the injection hole set on the side mold assembly, and the injection molding material in a molten state will flow into the upper part or even the inside of the prefabricated heel located in the second cavity and will also flow into the first cavity, and then the bottom mold assembly is driven to move upward, and the injection molding material is compacted by the cooperation of the first and second cavities of the bottom mold assembly and the protrusion of the upper mold, and is formed into a first layer of injection molding after cooling, and the formed first layer of injection molding and The prefabricated heels are firmly combined together, and the first layer of injection-molded formation and the prefabricated heels together constitute the bottom of the shoe. The first layer of injection-molded formation has better high temperature resistance and wear resistance. After the first layer of injection-molded formation is cooled and formed, the two side molds are opened in both directions, the upper mold rises and switches to a shoe last covered with an upper, the bottom mold assembly descends, the shoe last descends, and the two side molds are closed again, and a softer injection molding material (such as low-density polyurethane) is injected into the cavity formed by the side mold assembly, the shoe last and the first layer of injection-molded formation. After cooling, it is formed into a second layer of injection-molded formation. The second layer of injection-molded formation can firmly combine the upper and the entire injection-molded sole. The second layer of injection-molded formation can increase the softness of the sole and make it more comfortable to wear.
[0009] Furthermore, the bottom mold assembly includes a base and two movable blocks. The rear end of the base includes a boss, and the upper end of the boss constitutes the bottom wall of the second concave cavity. The two movable blocks are openably arranged on both sides of the boss. The two movable blocks together constitute the side walls between the two sides and the rear side of the second concave cavity. Through the opening and closing movement of the two movable blocks, the prefabricated heel can be conveniently installed into the second concave cavity, and the heel can also be conveniently removed from the second concave cavity after the production is completed.
[0010] Furthermore, the two movable blocks are respectively pushed together with the two side molds, and the two side molds can also push the two movable blocks to close simultaneously during the closing movement. An elastic component for driving the two movable blocks to open relative to the boss is arranged between the two movable blocks and the base. When the two side molds are separated, the elastic component can drive the two movable blocks to open by themselves without the need for other power sources.
[0011] Furthermore, an arc-shaped groove is provided on the inner side of the movable block, and the side of the boss is embedded in the grooves of the two movable blocks. The inner wall of the groove and the side of the boss have a guiding matching effect, which improves the stability of the movement of the movable block and can also prevent the movable block from shaking in the vertical direction.
[0012] Furthermore, the bottom mold assembly includes a base and a swing block, the swing block is swingably connected to the front end of the base, the first concave cavity is arranged on the swing block, and the rear end face of the swing block constitutes the front side wall of the second concave cavity, and the molded sole can be easily removed from the bottom mold assembly through the swinging movement of the swing block.
[0013] Furthermore, an arc-shaped connecting port is provided between the front end of the second cavity and the rear end of the first cavity, and the connecting port can improve the flow effect of the injection material in a molten state, thereby improving the injection effect.
[0014] Furthermore, the bottom wall of the first cavity is provided with convex / concave patterns, so that the lower end of the molded sole has patterns, which can improve the anti-slip effect. The convex / concave patterns can be designed into patterns, logos or shoe models, sizes, etc.
[0015] Furthermore, the two side molds of the side mold assembly are respectively provided with a first injection hole and a second injection hole at the joint, and the first injection hole is located below the second injection hole. The two injection holes are respectively used to convey different injection molding materials. The first injection hole is located at a lower position than the second injection hole, and is used for injection molding of the first layer of injection-molded objects, and the second injection hole is used for injection molding of the second layer of injection-molded objects. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural exploded view of the bottom mold assembly and the side mold assembly of the embodiment of the utility model;
[0017] Figure 2 This is a structural exploded view of the bottom mold assembly of the embodiment of the utility model;
[0018] Figure 3 This is a schematic diagram of the coordination of the upper mold, the side mold assembly and the bottom mold assembly in an embodiment of the utility model;
[0019] Figure 4 It is a schematic diagram of the coordination of the shoe last, the side mold assembly and the bottom mold assembly according to an embodiment of the utility model. DETAILED DESCRIPTION
[0020] The implementation of the utility model joint injection mold is as follows: Figure 1-4 As shown, it includes a bottom mold assembly 1 and a side mold assembly, wherein the side mold assembly includes two side molds 2 that can be opened and closed on both sides of the bottom mold, the inner side of the lower end of the side mold 2 is sealed with the side of the bottom mold assembly 1, and the inner side of the upper end of the side mold 2 is used to seal with the lower end of the shoe last 3, the upper front end of the bottom mold assembly 1 includes a first concave cavity 101 for molding the sole of the sole, and the upper rear end of the bottom mold assembly 1 includes a second concave cavity 102 for molding the heel of the sole, the second concave cavity 102 is used to fit and position with the prefabricated heel, and the lower end of the prefabricated heel is embedded downward The second concave cavity 102 has side walls around it for forming a tight contact fit with the prefabricated heel, and the upper end of the front side wall of the second concave cavity 102 is adjacent to the rear end of the first concave cavity 101. The mold also includes an upper mold 4, and the lower end of the upper mold 4 is provided with a first protrusion 41 at a position corresponding to the first concave cavity 101 and a second protrusion 42 at a position corresponding to the second concave cavity 102. The protrusions can compact the injected materials in the first cavity 101 and the second cavity 102 when the upper mold 4 and the bottom mold assembly 1 move towards each other.
[0021] Two injection holes are provided at the inner side of the rear end of the two side molds 2 for the injection material to flow into the concave cavity. Figure 3 As shown, they are respectively a first injection hole 21 and a second injection hole 22. The first injection hole 21 is located below the second injection hole 22. The two injection holes are respectively used to convey different injection molding materials. The first injection hole 21 is located at a lower position relative to the second injection hole 22 and is used for injection molding of a first layer of injection-molded objects, while the second injection hole 22 is used for injection molding of a second layer of injection-molded objects.
[0022] The bottom mold assembly 1 includes a base 11 and two movable blocks 12. The rear end of the base 11 includes a boss 111. The upper end of the boss 111 constitutes the bottom wall of the second cavity 102. The two movable blocks 12 are openably arranged on both sides of the boss 111. The two movable blocks 12 together constitute the side walls between the two sides and the rear side of the second cavity 102. The prefabricated heel can be easily installed into the second cavity 102 through the opening and closing movement of the two movable blocks 12. At the same time, the heel can also be easily removed from the second cavity 102 after the production is completed.
[0023] In this embodiment, the two movable blocks 12 are in a U-shaped structure. When the two movable blocks 12 are closed, the rear ends of the two movable blocks 12 are in close contact with each other to prevent the injection material in the second cavity 102 from leaking out. The movable block 12 is connected to the base 11 in a swinging or sliding manner. For example, the front end of the movable block 12 can be connected to the side of the base 11 through a hinge to form a swing connection.
[0024] The two movable blocks 12 are respectively pushed together with the two side molds 2. The two side molds 2 can also push the two movable blocks 12 to close simultaneously during the closing movement. An elastic component (not shown in the figure) is provided between the two movable blocks 12 and the base 11 for driving the two movable blocks 12 to open relative to the boss 111. The elastic component is arranged between the inner side of the movable block 12 and the side of the boss 111. When the two side molds 2 are separated, the elastic component can drive the two movable blocks 12 to open automatically without the need for other power sources.
[0025] An arc-shaped groove 121 is provided on the inner side of the movable block 12, and the side of the boss 111 is embedded in the grooves 121 of the two movable blocks 12. The inner wall of the groove 121 and the side of the boss 111 have a guiding matching effect, which improves the stability of the movement of the movable block 12 and can also prevent the movable block 12 from shaking in the vertical direction.
[0026] The bottom mold assembly 1 also includes a swing block 13, which is swingably connected to the front end of the base 11. Specifically, the front end of the swing block 13 is pivotally connected to the base 11, and the first cavity 101 is arranged on the swing block 13. The rear end face of the swing block 13 constitutes the front side wall of the second cavity 102. When the sole is completed, the formed sole can be quickly removed from the bottom mold assembly 1 by driving the swing block 13 to swing upward.
[0027] An arc-shaped connecting port 103 is provided between the front end of the second cavity 102 and the rear end of the first cavity 101. The connecting port 103 can improve the flow effect of the injection material in a molten state, so that the injection material in a molten state can be evenly distributed between the first cavity 101 and the second cavity 102, thereby improving the injection molding effect.
[0028] The bottom wall of the first cavity 101 is provided with convex / concave patterns a, so that the lower end of the molded sole has patterns, which can improve the anti-slip effect. The convex / concave patterns a can be designed into patterns, logos or shoe models, sizes, etc.
[0029] The steps and principles of the upper-jointed injection mold for making the sole of the utility model are as follows: first, the prefabricated heel is inserted into the second cavity 102, the upper mold 4 is lowered to the top of the bottom mold assembly, and then the side molds 2 on both sides are closed. When the side molds 2 are closed, the movable block 12 is also pushed to close, so that the side of the prefabricated heel is in close contact with the side wall of the second cavity 102, and then the injection molding material with wear-resistant and high-temperature resistant properties (such as high-density polyurethane) is injected into the first cavity 101 and the second cavity 102 of the bottom mold assembly 1 through the first injection hole 21, the injection molding material in a molten state will flow into the upper part or even the inside of the prefabricated heel located in the second cavity 102, and will also flow into the first cavity 101 through the connecting port 103, and then the bottom mold assembly 1 is driven to move upward, and the injection molding material is compacted by the cooperation of the first and second cavities of the bottom mold assembly 1 and the protrusions of the upper mold 4, and after cooling. After molding, it is formed into a first layer of injection molding. The molded first layer of injection molding and the prefabricated heel are firmly combined together. The first layer of injection molding and the prefabricated heel together constitute the bottom of the shoe. The first layer of injection molding has better high temperature resistance and wear resistance. After the first layer of injection molding is cooled and formed, the two side molds 2 are opened in both directions, the upper mold 4 rises and switches to a shoe last 3 covered with an upper, the bottom mold assembly 1 descends, the shoe last 3 descends, and the two side molds 2 are closed again. A softer injection molding material (such as low-density polyurethane) is injected into the cavity formed by the side mold assembly, the shoe last 3 and the first layer of injection molding. After cooling, it is molded into a second layer of injection molding. The second layer of injection molding can firmly combine the upper 3 and the entire injection-molded sole. The second layer of injection molding can improve the softness of the sole and make it more comfortable to wear. After the second layer of injection-molded product is cooled and formed, the two side molds 2 are opened, and the two movable blocks 12 are opened automatically, and the entire sole is driven to be removed from the bottom mold assembly 1 through the swing block 13.
[0030] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.
Claims
1. A continuous upper injection mold, comprising a bottom mold assembly and a side mold assembly, wherein the side mold assembly comprises two side molds which are opened and closed on both sides of the bottom mold, the inner side of the lower end of the side mold is sealed with the side of the bottom mold assembly, and the inner side of the upper end of the side mold is used to seal with the lower end of the shoe last, characterized in that: The upper front part of the bottom mold assembly includes a first cavity for molding the sole area of the sole, and the upper rear part of the bottom mold assembly includes a second cavity for molding the heel area of the sole. The second cavity is used to fit and position with the prefabricated heel. The second cavity is surrounded by side walls for fitting and contacting with the prefabricated heel. The upper end of the front side wall of the second cavity is adjacent to the rear end of the first cavity. The mold also includes an upper mold, and the lower end of the upper mold includes a protrusion that cooperates with the first cavity and the second cavity.
2. The joint injection mold according to claim 1, characterized in that: The bottom mold assembly includes a base and two movable blocks. The rear end of the base includes a boss, and the upper end of the boss constitutes the bottom wall of the second concave cavity. The two movable blocks are openably arranged on both sides of the boss, and the two movable blocks together constitute the side walls between the two sides and the rear side of the second concave cavity.
3. The joint injection mold according to claim 2, characterized in that: The two movable blocks are respectively pushed and matched with the two side molds, and an elastic component for driving the two movable blocks to close relative to the boss is arranged between the two movable blocks and the base.
4. The joint injection mold according to claim 2, characterized in that: The inner side of the movable block is provided with an arc-shaped groove, and the side parts of the boss are embedded in the grooves of the two movable blocks.
5. The joint injection mold according to claim 1, characterized in that: The bottom mold assembly includes a base and a swing block. The swing block is swingably connected to the front end of the base. The first concave cavity is arranged on the swing block. The rear end surface of the swing block constitutes the front side wall of the second concave cavity.
6. The joint injection mold according to claim 1, characterized in that: An arc-shaped connecting opening is arranged between the front end of the second cavity and the rear end of the first cavity.
7. The joint injection mold according to claim 1, characterized in that: The bottom wall of the first cavity is provided with convex / concave patterns.
8. The joint injection mold according to claim 1, characterized in that: The two side molds of the side mold assembly are respectively provided with a first injection hole and a second injection hole at the joint, and the first injection hole is located below the second injection hole.