Double-color plastic bottle injection mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a double-color plastic bottle injection mold which is characterized in that an upper pouring opening and a lower pouring opening are formed in the upper side of an inner mold of the mold and are matched with a left mold cavity and a right mold cavity, so that a pouring gate mark of a produced plastic bottle finished product is positioned on the inner side of a bottle body while double-color plastic bottle production is realized; the air injection holes are formed in the bottom of the inner mold, so that the mold can adopt a mode of injecting air into the plastic bottle to enable the bottle body to fall off, the mold can automatically complete demolding, manpower and bottle body blanking time are reduced, the production cost of the plastic bottle is reduced, and the production efficiency is improved. And the production efficiency of products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to a double-color plastic bottle injection mold. Background Art

[0002] In the cosmetics industry, the appearance design of packaging bottles plays a vital role in the market competitiveness of products. As consumers' aesthetic standards continue to improve, two-color gradient cosmetic bottles can not only add unique charm to the product, but also stand out from many similar products and attract consumers' attention.

[0003] However, in traditional injection molding, sprues are typically placed on the surface of the bottle to facilitate the injection and molding of the plastic. These sprues can leave noticeable defects after the injection molding process, such as bumps, depressions, or marks, severely impacting the overall aesthetics of the cosmetic bottle. For two-color gradient cosmetic bottles, which strive for a sophisticated appearance, these flaws are undoubtedly fatal, significantly reducing the product's quality and market value.

[0004] Furthermore, traditional injection molds present significant challenges in the product demolding process after injection molding. Due to the relatively small size of plastic cosmetic bottles, there is significant adhesion between the product and the mold, making it difficult for the product to be automatically and smoothly ejected from the mold after injection molding. This necessitates manual intervention, which not only increases labor intensity and labor costs during the production process, but also reduces production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a two-color plastic bottle injection mold to solve the problems mentioned in the background technology.

[0006] In order to achieve the above technical objectives, the technical solutions adopted by this utility model are as follows:

[0007] A two-color plastic bottle injection mold includes a bracket, an inner mold is fixed on the upper side of the bracket, a left mold cavity and a right mold cavity matching the inner mold are installed on the outer side of the inner mold, a baffle plate matching the left mold cavity and the right mold cavity is installed on the upper side of the inner mold, an upper pouring port is provided on the upper side of the inner mold, a lower pouring port is provided on the lower side of the inner mold, a feeding pipe connected with the upper pouring port and the lower pouring port respectively is installed on the top of the inner mold, an air jet hole is provided at the bottom of the inner mold, a connecting pipe connected with the air jet hole is installed on the upper side of the inner mold, and an opening and closing component for controlling the movement of the left mold cavity and the right mold cavity is installed on the upper side of the bracket.

[0008] There are two groups of opening and closing components, which are symmetrically distributed front to back. The opening and closing components include two upper and lower sliding rods fixed to the bracket, gears, and upper and lower racks that are meshed with the gears and rotate symmetrically distributed up and down. The upper rack and the lower rack are slidingly connected to the upper and lower sliding rods respectively. A rotating rod is rotatably connected to the middle part of the bracket, and the two gears are fixedly connected to the front and rear ends of the rotating rod respectively. The upper rack is fixedly connected to the right mold cavity, and the lower rack is rotatably connected to the left mold cavity. A driving component for controlling the movement of the upper rack is installed on the side of the bracket.

[0009] The driving component is a cylinder fixedly connected to the bracket, and the output end of the cylinder is transmission-connected to one of the upper racks.

[0010] The inner mold, and the left mold cavity and the right mold cavity matching the inner mold are in multiple groups and are evenly distributed in an array, and the multiple left mold cavities and right mold cavities adjacent to each other are fixedly connected front to back.

[0011] The upper sides of the left mold cavity and the right mold cavity are both provided with inclined chamfers, and the baffle plate as a whole is in the shape of an inverted truncated cone that matches the inclined chamfers.

[0012] Furthermore, a circular cavity is opened on the lower side of the inner mold, the air injection hole is located on the inner side of the circular cavity, a vertical rod is slidably connected to the middle of the inner mold, a cover plate matching the circular cavity is fixed to the bottom of the vertical rod, a baffle is fixed to the top of the vertical rod, a spring is sleeved on the outside of the vertical rod, and the upper and lower ends of the spring are respectively fixedly connected to the baffle and the top of the inner mold.

[0013] The upper side of the inner mold of the mold is provided with an upper pouring port and a lower pouring port, and the design of the left mold cavity and the right mold cavity makes it possible to realize the production of two-color plastic bottles while also making the pouring port of the finished plastic bottle located on the inside of the bottle body, thereby making the appearance of the plastic bottle more refined and improving the overall aesthetics of the plastic bottle. An air jet hole is provided at the bottom of the inner mold so that the mold can eject the bottle body by jetting air into the inside of the plastic bottle, thereby making the mold automatically demouldable, reducing manpower and bottle unloading time, as well as reducing the production cost of plastic bottles and improving product production efficiency. The coordination of the gear, upper rack and lower rack makes the left mold cavity and the right mold cavity able to run synchronously relative to each other. This setting makes the structure of the opening and closing component simpler, and also helps to reduce its failure rate, as well as the production and maintenance cost of the entire mold, and helps to improve the overall reliability of the mold. The cylinder can realize the opening and closing of the mold faster, and also makes the left mold cavity and the right mold cavity close more tightly. At the same time, the cylinder The structure itself is relatively simple, which helps to further improve the reliability of the entire mold. The mold structure is evenly arrayed and the multiple adjacent left mold cavities and right mold cavities are fixedly connected front and back, so that each mold structure can move synchronously, and the process conditions, displacement and pressure in each molding cavity are relatively consistent. This design can greatly increase the product output per unit time, significantly improve production efficiency, and reduce the production cost of a single product. The baffle plate is overall in the shape of a truncated cone that matches the inclined chamfer. This design can make the baffle plate fit tightly with the inclined chamfer of the mold, so that when the mold is closed, each mold cavity is closed more tightly to prevent material leakage during the molding process. The cooperation of the circular cavity, vertical rod, cover plate and spring makes the cover plate automatically push down when the jet hole is ejected. When not in use, the cover plate and the inner mold form a complete whole, thereby preventing plastic from entering the jet hole to form a bulge, which helps to further improve the quality of plastic bottles processed by the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further described by way of non-limiting embodiments given in the accompanying drawings.

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 This is a structural diagram of the utility model from another angle.

[0017] Figure 3 This is a schematic structural diagram of a single left mold cavity, a right mold cavity, and an inner mold in the present invention.

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0019] Figure 5 It is a schematic diagram of the structure of the right mold cavity and the inner mold in the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the inner mold in the present utility model.

[0021] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0022] Bracket 1, inner mold 2, left mold cavity 3, right mold cavity 4, baffle plate 5, upper pouring port 6, lower pouring port 7, feeding pipe 8, air jet hole 9, connecting pipe 10, slide bar 11, gear 12, upper rack 13, lower rack 14, rotating rod 15, cylinder 16, inclined chamfer 17, circular cavity 18, vertical rod 19, cover plate 20, baffle 21, spring 22. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1: Figure 1-5 As shown, a two-color plastic bottle injection mold includes a bracket 1, an inner mold 2 is fixed on the upper side of the bracket 1, a left mold cavity 3 and a right mold cavity 4 matching therewith are installed on the outer side of the inner mold 2, a baffle 5 matching the left mold cavity 3 and the right mold cavity 4 is installed on the upper side of the inner mold 2, an upper pouring port 6 is opened on the upper side of the inner mold 2, a lower pouring port 7 is opened on the lower side of the inner mold 2, a feeding pipe 8 connected with the upper pouring port 6 and the lower pouring port 7 respectively is installed on the top of the inner mold 2, an air jet hole 9 is opened at the bottom of the inner mold 2, a connecting pipe 10 connected with the air jet hole 9 is installed on the upper side of the inner mold 2, and an opening and closing component for controlling the movement of the left mold cavity 3 and the right mold cavity 4 is installed on the upper side of the bracket 1.

[0025] When the utility model is in use, the left mold cavity 3 and the right mold cavity 4 are in a closed state, and together with the baffle plate 5 and the inner mold 2, form a complete plastic bottle mold. The upper pouring port 6 and the lower pouring port 7 are respectively connected to the external injection molding machines of different colors through the feeding pipe 8, and the air jet hole 9 is connected to the external compressor pipeline through the connecting pipe 10. During injection molding, the two-color plastic bottle can be poured through the upper pouring port 6 and the lower pouring port 7. After the plastic bottle is cooled, the opening and closing assembly controls the left mold cavity 3 and the right mold cavity 4 to separate left and right. At this time, the air is sprayed into the inside of the plastic bottle through the air jet hole 9, and the plastic bottle falls downward for unloading.

[0026] The upper side of the inner mold 2 of the mold is provided with an upper pouring port 6 and a lower pouring port 7, and the design of the left mold cavity 3 and the right mold cavity 4 enables the production of two-color plastic bottles while also making the pouring port print of the finished plastic bottle located inside the bottle body, thereby making the appearance of the plastic bottle more refined and improving the overall aesthetics of the plastic bottle. The bottom of the inner mold 2 is provided with an air jet hole 9, which allows the mold to eject the bottle body by jetting air into the inside of the plastic bottle, thereby enabling the mold to automatically complete demoulding, reducing manpower and bottle unloading time, as well as reducing the production cost of plastic bottles and improving product production efficiency.

[0027] There are two groups of opening and closing components, which are symmetrically distributed front to back. The opening and closing components include two upper and lower sliding rods 11 fixed to the bracket 1, a gear 12, and an upper rack 13 and a lower rack 14 that are meshed with the gear 12 and are rotationally symmetrically distributed up and down. The upper rack 13 and the lower rack 14 are respectively slidably connected to the upper and lower sliding rods 11. A rotating rod 15 is rotatably connected to the middle part of the bracket 1. The two gears 12 are respectively fixedly connected to the front and rear ends of the rotating rod 15. The upper rack 13 is fixedly connected to the right mold cavity 4, and the lower rack 14 is rotatably connected to the left mold cavity 3. A driving component for controlling the movement of the upper rack 13 is installed on the side of the bracket 1.

[0028] The coordination of the gear 12, the upper rack 13 and the lower rack 14 enables the left mold cavity 3 and the right mold cavity 4 to run synchronously relative to each other. This arrangement makes the structure of the opening and closing assembly simpler, while also helping to reduce its failure rate, as well as the overall production and maintenance costs of the mold, and helps to improve the overall reliability of the mold.

[0029] The driving component is a cylinder 16 fixedly connected to the bracket 1 , and the output end of the cylinder 16 is drivingly connected to one of the upper racks 13 .

[0030] The cylinder 16 can realize the opening and closing of the mold more quickly, and also makes the left mold cavity 3 and the right mold cavity 4 close more tightly. At the same time, the structure of the cylinder 16 itself is relatively simple, which helps to further improve the reliability of the entire mold.

[0031] The inner mold 2, and the left mold cavities 3 and right mold cavities 4 matching the inner mold 2 are in multiple groups and evenly distributed in an array, and multiple adjacent left mold cavities 3 and right mold cavities 4 are fixedly connected front and back.

[0032] The mold structure is evenly distributed in an array, and multiple adjacent left mold cavities 3 and right mold cavities 4 are fixedly connected front and back, so that each mold structure can move synchronously, and the process conditions, displacement and pressure in each molding cavity are relatively consistent. This design can greatly increase the product output per unit time, significantly improve production efficiency, and reduce the production cost of a single product.

[0033] An inclined chamfer 17 is formed on the upper side of the left mold cavity 3 and the right mold cavity 4 , and the baffle plate 5 is in the shape of an inverted truncated cone that matches the inclined chamfer 17 .

[0034] The retaining plate 5 is in the shape of a truncated cone that matches the inclined chamfer 17. This design allows the retaining plate 5 to fit tightly with the inclined chamfer 17 of the mold, so that each mold cavity is closed more tightly when the mold is closed to prevent material leakage during the molding process.

[0035] Example 2: Figure 3-7 As shown, further improvements are made on the basis of Example 1. A circular cavity 18 is opened on the lower side of the inner mold 2, and the air injection hole 9 is located on the inner side of the circular cavity 18. A vertical rod 19 is slidably connected to the middle of the inner mold 2, and a cover plate 20 matching the circular cavity 18 is fixed to the bottom of the vertical rod 19. A baffle 21 is fixed to the top of the vertical rod 19, and a spring 22 is sleeved on the outside of the vertical rod 19. The upper and lower ends of the spring 22 are fixedly connected to the baffle 21 and the top of the inner mold 2 respectively.

[0036] The cooperation of the circular cavity 18, the vertical rod 19, the cover plate 20 and the spring 22 enables the cover plate 20 to be automatically pushed downward when the air jet hole 9 is ejecting air. When not in use, the cover plate 20 forms a complete whole with the inner mold 2, thereby preventing plastic from entering the air jet hole 9 to form a bulge, which helps to further improve the quality of plastic bottles processed by the mold.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the spirit and technical principles disclosed herein shall be covered by the claims of the present invention.

Claims

1. A two-color plastic bottle injection mold, including a bracket, characterized by: An inner mold is fixed on the upper side of the bracket, and a left mold cavity and a right mold cavity matching thereof are installed on the outer side of the inner mold, and a baffle plate matching the left mold cavity and the right mold cavity is installed on the upper side of the inner mold. An upper pouring port is provided on the upper side of the inner mold, and a lower pouring port is provided on the lower side of the inner mold. A feeding pipe connected with the upper pouring port and the lower pouring port respectively is installed on the top of the inner mold, an air injection hole is provided at the bottom of the inner mold, and a connecting pipe connected with the air injection hole is installed on the upper side of the inner mold. An opening and closing component for controlling the movement of the left mold cavity and the right mold cavity is installed on the upper side of the bracket.

2. A two-color plastic bottle injection mold according to claim 1, characterized in that: There are two groups of opening and closing components, which are symmetrically distributed front to back. The opening and closing components include two upper and lower sliding rods fixed to the bracket, gears, and upper and lower racks that are meshed with the gears and rotate symmetrically distributed up and down. The upper rack and the lower rack are slidingly connected to the upper and lower sliding rods respectively. A rotating rod is rotatably connected to the middle part of the bracket, and the two gears are fixedly connected to the front and rear ends of the rotating rod respectively. The upper rack is fixedly connected to the right mold cavity, and the lower rack is rotatably connected to the left mold cavity. A driving component for controlling the movement of the upper rack is installed on the side of the bracket.

3. The double-color plastic bottle injection mold according to claim 2, characterized in that: The driving component is a cylinder fixedly connected to the bracket, and the output end of the cylinder is transmission-connected to one of the upper racks.

4. The double-color plastic bottle injection mold according to claim 3, characterized in that: The inner mold, and the left mold cavity and the right mold cavity matching the inner mold are in multiple groups and are evenly distributed in an array, and the multiple left mold cavities and right mold cavities adjacent to each other are fixedly connected front to back.

5. The double-color plastic bottle injection mold according to claim 4, characterized in that: The upper sides of the left mold cavity and the right mold cavity are both provided with inclined chamfers, and the baffle plate as a whole is in the shape of an inverted truncated cone that matches the inclined chamfers.

6. The double-color plastic bottle injection mold according to claim 5, characterized in that: A circular cavity is provided on the lower side of the inner mold, the air injection hole is located on the inner side of the circular cavity, a vertical rod is slidably connected to the middle of the inner mold, a cover plate matching the circular cavity is fixed to the bottom of the vertical rod, a baffle is fixed to the top of the vertical rod, a spring is sleeved on the outer side of the vertical rod, and the upper and lower ends of the spring are fixedly connected to the baffle and the top of the inner mold respectively.

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