Upper-connected shoe injection mold

Abstract

According to the upper-connected shoe injection mold, through the design of a complete frustum injection molding pipe composed of a first protection plate, a second protection plate, a first half frustum and a second half frustum, when the injection molding pipe is inserted in a butt joint mode, the direct impact force of the injection molding pipe on an injection molding channel can be effectively dispersed and relieved through the structures; insertion and positioning of the injection molding pipe are facilitated, abrasion and deformation of the injection molding pipe to the injection molding channel can be further reduced, and therefore the service life of the mold is prolonged. Meanwhile, when the frustum injection molding pipe is in butt joint with the injection molding pipe, the stability of connection between the frustum injection molding pipe and the injection molding pipe in the injection molding process is guaranteed through the conical surface structure, molten plastic materials enter the injection molding channel from the frustum injection molding pipe, the guide groove and the through groove in sequence, the overflow and leakage phenomena in the injection molding process are avoided, injection molding of upper-connected shoes is achieved, and the service life of the upper-connected shoes is prolonged. Therefore, the quality and the consistency of injection products are improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a shoe upper. Background Technology

[0002] Injection molding of lapels is a process in which molten plastic is injected into an outer mold and bonded to the upper. Currently, during injection molding of lapels, an injection tube is inserted into the injection hole of the mold to inject molten plastic material into the mold cavity. After injection, the mold is closed and held for a period of time to ensure the plastic cools and solidifies fully before the mold is opened and the finished shoe is removed.

[0003] The existing injection tubes have the following defects during the mold insertion process: the mold itself is an injection part used for shoe sole molding, so it is made of a relatively soft material. When the injection tube is continuously inserted into the injection mold, it is easy to cause damage and deformation to the injection tube of the mold. Due to long-term use, the injection port is deformed, which makes it easy for overflow to occur during injection, causing the injection mold to be scrapped prematurely, increasing production and maintenance costs. Summary of the Invention

[0004] To solve the above problems, the technical solution provided by this utility model is as follows:

[0005] A single-layer shoe injection mold includes a first side mold, a second side mold, a bottom mold, and a shoe last. The bottom mold is located between the first side mold and the second side mold, and the shoe last is located above the bottom mold. The bottom mold has an injection channel. The first side mold and the second side mold have a first bypass groove and a second bypass groove located opposite the injection channel. The first side mold has a first protective plate, and the first protective plate has a first guide groove located opposite the first bypass groove. A first semi-truncated cone is located on the side of the first guide groove away from the first side mold. The second side mold has a second protective plate, and the second protective plate has a second guide groove located opposite the second bypass groove. A second semi-truncated cone is located on the side of the second guide groove away from the second side mold. When the first side mold and the second side mold are joined, the first semi-truncated cone and the second semi-truncated cone form a complete frustum-shaped injection tube.

[0006] The present invention is further configured such that a first fixing hole and a second fixing hole are respectively provided on the first side mold and the second side mold, and a first positioning hole and a second positioning hole are respectively provided on the first protective plate and the second protective plate. The first protective plate is connected to the first side mold by fasteners passing through the first positioning hole and the first fixing hole in sequence, and the second protective plate is connected to the second side mold by fasteners passing through the second positioning hole and the second fixing hole in sequence.

[0007] The present invention is further configured such that the diameter of the truncated cone injection pipe gradually increases from the outside to the inside.

[0008] The present invention is further configured such that a first positioning wall is provided on the side of the first side mold close to the second side mold, and a second positioning wall is provided on the side of the second side mold close to the first side mold, and the outer periphery of the bottom mold is adapted to the first positioning wall and the second positioning wall respectively.

[0009] The present invention is further configured such that a first injection-molded inner wall is provided on one side of the first positioning wall, and a second injection-molded inner wall is provided on one side of the second positioning wall, and the outer contour of the shoe last is adapted to the first injection-molded inner wall and the second injection-molded inner wall respectively.

[0010] The present invention is further configured such that the first side mold and the second side mold are respectively provided with a first sinking groove and a second sinking groove, the first protective plate is located in the first sinking groove, and the second protective plate is located in the second sinking groove.

[0011] The present invention is further configured such that the first side mold is provided with a side mold positioning hole, and the second side mold is provided with a side mold positioning post. When the first side mold and the second side mold are spliced ​​together, the side mold positioning post is connected in the side mold positioning hole.

[0012] The present invention is further configured such that the top surface of the bottom mold is adapted to the bottom surface of the shoe last, and the top surface of the bottom mold is provided with a feeding hole.

[0013] The present invention is further configured such that the first protective plate and the second protective plate are made of hard alloy material.

[0014] The present invention is further configured such that the diameter of the truncated cone injection pipe is not less than 8.0 mm and not more than 15.0 mm.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] This technical solution for injection molding of lapels involves setting a first protective plate and a second protective plate on the first side mold and the second side mold respectively, and using the frustum structure on the protective plate to perform injection molding on the mold. Molten plastic material enters the injection channel sequentially from the frustum injection tube, guide groove and through groove, thereby realizing the injection molding of lapels.

[0017] This invention features a first and second protective plate in the injection mold of a shoe upper, along with a complete frustum-shaped injection tube design consisting of a first and second truncated cone. When the injection tube is inserted, these structures effectively disperse and mitigate the direct impact force of the injection tube on the injection channel. This not only facilitates the insertion and positioning of the injection tube but also further reduces wear and deformation of the injection channel, thereby extending the mold's service life. Simultaneously, when the frustum-shaped injection tube is inserted into the injection mold, the conical surface structure ensures the stability of the connection during injection molding, preventing overflow and leakage, thus improving the quality and consistency of the injection-molded product. Attached Figure Description

[0018] Figure 1 This is an exploded view of the injection mold for the upper-mounted shoe according to an embodiment of this utility model.

[0019] Figure 2 This is a perspective view of the first side mold of this utility model embodiment.

[0020] Figure 3 This is a perspective view of the second side mold of an embodiment of the present utility model.

[0021] Figure 4 This is a perspective view of the first and second protective plates assembled in an embodiment of this utility model.

[0022] Figure 5 This is a side view of the first protective plate in an embodiment of this utility model.

[0023] Figure 6 This is a side view of the second protective plate according to an embodiment of the present invention.

[0024] Figure 7 This is a perspective view of the injection mold for the upper shoe of this utility model during injection molding. Detailed Implementation

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to fixed connections, integral connections, or detachable connections; they can refer to mechanical connections or electrical connections, or internal connections between two components; they can refer to direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] Combined with appendix Figure 1 To be continued Figure 7 This utility model provides an injection mold for a single-layer shoe, comprising a first side mold 1, a second side mold 2, a bottom mold 3, and a shoe last 4. The bottom mold 3 is located between the first side mold 1 and the second side mold 2, and the shoe last 4 is located above the bottom mold 3. The bottom mold 3 has an injection channel 31. The first side mold 1 and the second side mold 2 have a first bypass groove 11 and a second bypass groove 21 located opposite the injection channel 31. The first side mold 1 has a first protective plate 5, which is directly opposite the last 4. A first guide groove 51 is provided at the position of the first bypass groove 11. A first semi-cone 52 is provided on the side of the first guide groove 51 away from the first side mold 1. A second protective plate is provided on the second side mold. A second guide groove 61 is provided on the position of the second protective plate 6 opposite to the second bypass groove 21. A second semi-cone 62 is provided on the side of the second guide groove 61 away from the second side mold 2. When the first side mold 1 and the second side mold 2 are spliced, the first semi-cone 52 and the second semi-cone 62 form a complete frustum injection molding pipe.

[0029] The injection molding process of the injection mold for the upper shoe in this embodiment is as follows: the first side mold 1 and the second side mold 2 move closer to the bottom mold 3, the upper is fitted onto the shoe last 4, and the shoe last 4 is lowered. The injection tube 8 is controlled to move toward the truncated cone injection tube. The opening of the injection tube 8 is fitted onto the outer wall of the truncated cone injection tube. The injection tube 8 is stably connected to the truncated cone injection tube by using the heat-resistant sealing ring on the opening of the injection tube 8 and the interference fit between the injection tube 8 and the truncated cone injection tube.

[0030] In this embodiment, the injection mold for the upper shoe features a first protective plate 5 and a second protective plate 6, along with a complete frustum-shaped injection tube design consisting of a first half-cone 52 and a second half-cone 63. When the injection tube 8 is inserted, these structures effectively disperse and mitigate the direct impact force of the injection tube on the injection channel 31. This not only facilitates the insertion and positioning of the injection tube 8 but also further reduces wear and deformation of the injection channel, thereby extending the mold's service life. Simultaneously, when the frustum-shaped injection tube of this invention is inserted with the injection tube, the conical surface structure ensures the stability of the connection during injection molding, preventing overflow and leakage, thus improving the quality and consistency of the injection molded product.

[0031] In this embodiment, the first side mold 1 and the second side mold 2 are respectively provided with a first fixing hole 12 and a second fixing hole 22, and the first protective plate 5 and the second protective plate 6 are respectively provided with a first positioning hole 53 and a second positioning hole 63. The first protective plate 5 is connected to the first side mold 1 by fasteners 7 passing through the first positioning hole 53 and the first fixing hole 12 in sequence, and the second protective plate 6 is connected to the second side mold 2 by fasteners 7 passing through the second positioning hole 63 and the second fixing hole 22 in sequence.

[0032] In this embodiment, as shown in the appendix Figure 5 and attached Figure 6 As shown, the diameter of the frustum injection molding tube gradually increases from the outside to the inside, and the direction from the outside to the inside is the direction of material injection.

[0033] In this embodiment, the first side mold 1 is provided with a first positioning wall 13 on the side close to the second side mold 2, and the second side mold 2 is provided with a second positioning wall 23 on the side close to the first side mold 1. The outer periphery of the bottom mold 3 is adapted to the first positioning wall 13 and the second positioning wall 23 respectively.

[0034] In this embodiment, a first injection molding inner wall 14 is provided on one side of the first positioning wall 13, and a second injection molding inner wall 24 is provided on one side of the second positioning wall 23. The outer contour of the shoe last 4 is adapted to the first injection molding inner wall 14 and the second injection molding inner wall 24 respectively. When the shoe last 4 with the upper is placed into the bottom mold 3, an injection molding cavity is formed between the upper and the first side mold 1, the second side mold 2 and the bottom mold 3.

[0035] In this embodiment, the first side mold 1 and the second side mold 2 are respectively provided with a first sink 15 and a second sink 25, the first protective plate 5 is located in the first sink 15, and the second protective plate 6 is located in the second sink 25.

[0036] In this embodiment, the first side mold 1 is provided with a side mold positioning hole 16, and the second side mold 2 is provided with a side mold positioning post 26. When the first side mold 1 and the second side mold 2 are spliced ​​together, the side mold positioning post 26 is connected in the side mold positioning hole 16.

[0037] In this embodiment, the top surface of the bottom mold 3 is adapted to the bottom surface of the shoe last 4, and the top surface of the bottom mold 3 is provided with a feeding hole, which is not shown in the accompanying drawings.

[0038] In this embodiment, the first protective plate 5 and the second protective plate 6 are made of hard alloy material, specifically WC-Co hard alloy, which is formed by high-temperature sintering of tungsten carbide and cobalt powder. It has a hardness of up to HRA90 and has excellent bending and compressive strength.

[0039] In this embodiment, the diameter of the frustum injection molding tube is not less than 8.0 mm and not more than 15.0 mm.

[0040] In this embodiment, the injection mold for the lapels is provided with a first protective plate 5 and a second protective plate 6 on the first side mold 1 and the second side mold 2 respectively. The mold is injected using the frustum structure on the protective plate. The molten plastic material enters the injection channel sequentially from the frustum injection tube, the guide groove and the through groove, thereby realizing the injection molding of the lapels.

[0041] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A type of injection mold for upper-mounted shoes, characterized in that, The system includes a first side mold, a second side mold, a bottom mold, and a shoe last. The bottom mold is located between the first side mold and the second side mold, and the shoe last is located above the bottom mold. The bottom mold has an injection channel. The first side mold and the second side mold have a first bypass groove and a second bypass groove located opposite the injection channel. The first side mold has a first protective plate, and the first protective plate has a first guide groove located opposite the first bypass groove. The side of the first guide groove away from the first side mold has a first semi-conical truncated cone. The second side mold has a second protective plate, and the second protective plate has a second guide groove located opposite the second bypass groove. The side of the second guide groove away from the second side mold has a second semi-conical truncated cone. When the first side mold and the second side mold are joined, the first semi-conical truncated cone and the second semi-conical truncated cone form a complete frustum-shaped injection tube.

2. The injection mold for a one-piece shoe as described in claim 1, characterized in that, The first side mold and the second side mold are respectively provided with a first fixing hole and a second fixing hole. The first protective plate and the second protective plate are respectively provided with a first positioning hole and a second positioning hole. The first protective plate is connected to the first side mold by fasteners passing through the first positioning hole and the first fixing hole in sequence. The second protective plate is connected to the second side mold by fasteners passing through the second positioning hole and the second fixing hole in sequence.

3. The injection mold for a one-piece shoe as described in claim 1, characterized in that, The diameter of the truncated cone injection-molded pipe gradually increases from the outside to the inside.

4. The injection mold for a one-piece shoe as described in claim 1, characterized in that, The first side mold has a first positioning wall on the side close to the second side mold, and the second side mold has a second positioning wall on the side close to the first side mold. The outer periphery of the bottom mold is adapted to the first positioning wall and the second positioning wall respectively.

5. The injection mold for a one-piece shoe as described in claim 4, characterized in that, The first positioning wall has a first injection-molded inner wall on one side, and the second positioning wall has a second injection-molded inner wall on one side. The outer contour of the shoe last is adapted to the first injection-molded inner wall and the second injection-molded inner wall, respectively.

6. The injection mold for a one-piece shoe as described in claim 1, characterized in that, The first side mold and the second side mold are respectively provided with a first sinking groove and a second sinking groove, the first protective plate is located in the first sinking groove, and the second protective plate is located in the second sinking groove.

7. The injection mold for a one-piece shoe as described in claim 1, characterized in that, The first side mold is provided with a side mold positioning hole, and the second side mold is provided with a side mold positioning post. When the first side mold and the second side mold are spliced ​​together, the side mold positioning post is connected in the side mold positioning hole.

8. A molding die for a shoe upper according to any one of claims 1 to 7, characterized in that, The top surface of the bottom mold is adapted to the bottom surface of the shoe last, and the top surface of the bottom mold is provided with a feeding hole.

9. A molding die for a shoe upper according to any one of claims 1 to 7, characterized in that, The first protective plate and the second protective plate are made of hard alloy material.

10. A molding die for a one-piece shoe according to any one of claims 1 to 7, characterized in that, The diameter of the truncated cone injection-molded pipe is not less than 8.0 mm and not more than 15.0 mm.

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