Injection mold for turnover box

Abstract

The injection mold comprises an upper mold base and a lower mold base, a cavity is formed in the end face, facing the upper mold base, of the lower mold base, a fixed mold block is fixedly connected in the cavity, four movable mold blocks are movably connected to the positions, located on the periphery of the fixed mold block, in the cavity, and an injection molding cavity of the turnover box is defined by the fixed mold block, the movable mold blocks and the upper mold base; and a driving piece is connected to the upper mold base and used for driving the four movable mold blocks to be away from the fixed mold block during mold opening, and demolding of the turnover box is facilitated. The fixed die block and the four movable die blocks are all arranged on the lower die base, the upper die base is separated from the lower die base during die opening, the fixed die block is still supported in the turnover box at the moment, and when the four movable die blocks move towards the outer side, due to the fact that the fixed die block supports the inner peripheral wall of the turnover box, the outer peripheral wall of the turnover box cannot expand outwards along with the movable die blocks, and the turnover box is not prone to deformation. And the mechanical arm can easily take down the turnover box from the bottom of the turnover box, and time and labor are saved.

Description

Technical Field

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

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. Injection molding is a processing method used for the mass production of parts with complex shapes; specifically, it refers to the process of molding plastic parts by applying heat to a mold.

[0003] The plastic is injected into the mold cavity under high pressure by an injection molding machine, and after cooling and solidification, the molded product is obtained.

[0004] Turnover boxes, also known as logistics boxes, are injection molded and used in transportation, distribution, storage, and processing within the logistics process. A typical injection mold for turnover boxes includes an upper mold base and a lower mold base. The upper mold base contains a cavity, and the lower mold base contains a core. To facilitate demolding, the cavity of the upper mold base is enclosed by four moving modules. After the turnover box is injection molded, the lower mold base moves the core out of the cavity, and then the four moving modules move outwards, allowing the formed turnover box to be demolded. This facilitates subsequent removal of the turnover box.

[0005] However, the turnover box is at a high temperature when it is first formed. After the lower mold base drives the core out of the cavity, there is a lack of support inside the turnover box. Therefore, when the four moving modules move outward, the outer peripheral wall of the turnover box will stretch slightly outward with the corresponding moving module. Due to equipment and cost limitations, the actual distance that the four moving modules can move is very small. Even if the outer peripheral wall of the turnover box expands slightly outward, it is easy for the turnover box to get stuck in the cavity. The robotic arm has difficulty removing it and workers need to pull it left and right to demold it, which is not only inefficient but also time-consuming and labor-intensive. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an injection mold that facilitates the demolding of turnover boxes.

[0007] The technical solution of this utility model is to provide an injection mold for a turnover box with the following structure: it includes an upper mold base and a lower mold base. The lower mold base has a cavity on one end face facing the upper mold base. A fixed module is fixedly connected in the cavity. Four movable modules are movably connected around the fixed module in the cavity. The fixed module, the movable modules and the upper mold base together form the injection cavity of the turnover box. A driving component is connected to the upper mold base to drive the four movable modules away from the fixed module when the mold is opened, so as to facilitate the demolding of the turnover box.

[0008] With the above structure, the injection mold for turnover boxes of this utility model has the following advantages compared with the prior art:

[0009] This invention places the fixed module (i.e., the core) and four moving modules on the lower mold base. When the mold is opened, the upper mold base separates from the lower mold base. At this time, the fixed module is still supported inside the turnover box. When the four moving modules move outward, the outer peripheral wall of the turnover box will not expand outward with the moving modules due to the support of the fixed module on the inner peripheral wall of the turnover box. Therefore, there will be no difficulty in demolding. The robotic arm can easily remove it from the bottom of the turnover box, saving time and effort.

[0010] Preferably, each of the four moving modules is provided with an inclined guide hole that is inclined from bottom to top and outward; the driving component is a number of inclined guide pillars connected to the upper mold base and corresponding to the inclined guide holes one by one; the inclined guide pillars are used to be inserted into the corresponding inclined guide holes, and when the mold is opened or closed, they drive the corresponding moving module away from or closer to the fixed module.

[0011] Preferably, the upper mold base has several vertically extending guide posts on its end face facing the lower mold base, and the lower mold base has guide holes corresponding to the guide posts. The guide posts are inserted into the corresponding guide holes. The cooperation between the guide posts and the guide holes can play a guiding role, preventing the upper and lower mold bases from radially shifting during relative movement.

[0012] Preferably, the fixing module is trapezoidal in shape, with the upper part being smaller than the lower part. The upper part of the fixing module is slightly smaller than the lower part, which facilitates the demolding of the turnover box.

[0013] Preferably, the outer peripheral wall of the fixed module is provided with a groove for forming the reinforcing ribs of the inner wall of the turnover box, and the upper end of the groove penetrates through the top of the fixed module.

[0014] Preferably, the fixed module has a hollow inner cavity, and its top has a through hole extending downwards and communicating with the inner cavity. A lifting cylinder is installed inside the fixed module's inner cavity, and the output end of the lifting cylinder is connected to a lifting rod. The lifting cylinder drives the top of the lifting rod to extend or retract from the through hole. Initially, the top of the lifting rod is flush with the top of the fixed module. During mold opening, the upper mold base moves the four moving modules away from the fixed module, and then the lifting cylinder drives the top of the lifting rod to extend out of the through hole, pushing the turnover box upwards, facilitating its detachment from the fixed module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a partial structural schematic diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the lower mold base in this utility model.

[0018] Figure 4This is a top view of the structure of the lower mold base in this utility model.

[0019] Figure 5 This is a schematic diagram of the fixed module in this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the turnover box in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Upper mold base, 11. Angled guide post, 12. Guide post, 2. Lower mold base, 21. Cavity, 22. Fixed module, 221. Groove, 222. Through hole, 23. Moving module, 231. Angled guide hole, 24. Guide hole, 25. Lifting rod, 3. Turnover box. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figures 1-6 As shown, this utility model discloses an injection mold for a turnover box: it includes an upper mold base 1 and a lower mold base 2. A cavity 21 is provided on one end face of the lower mold base 2 facing the upper mold base 1. A fixed module 22 is fixedly connected inside the cavity 21. Four movable modules 23 are movably connected around the fixed module 22 within the cavity 21. The fixed module 22, the movable modules 23, and the upper mold base 1 together form the injection cavity of the turnover box 3. A driving component is connected to the upper mold base 1, which drives the four movable modules 23 away from the fixed module 22 during mold opening, facilitating demolding of the turnover box 3.

[0026] Each of the four moving modules 23 is provided with an inclined guide hole 231 that is inclined from bottom to top and outward; the driving component is a number of inclined guide pins 11 connected to the upper mold base 1 and corresponding to the inclined guide holes 231; the inclined guide pins 11 are used to insert into the corresponding inclined guide holes 231; when the mold is opened or closed, the upper mold base 1 drives the corresponding moving module 23 away from or closer to the fixed module 22 through the inclined guide pins 11.

[0027] Several vertically extending guide posts 12 are provided on the end face of the upper mold base 1 facing the lower mold base 2. The lower mold base 2 is provided with guide holes 24 corresponding to the guide posts 12. The guide posts 12 are used to insert into the corresponding guide holes 24. The cooperation between the guide posts 12 and the guide holes 24 can play a guiding role, so that the upper mold base 1 and the lower mold base 2 will not be radially offset during relative movement.

[0028] For example Figure 5 As shown, the fixed module 22 is arranged in a trapezoidal shape with a smaller top and a larger bottom, which facilitates the demolding of the turnover box 3.

[0029] The outer peripheral wall of the fixed module 22 is also provided with a groove 221 for forming the reinforcing ribs of the inner wall of the turnover box 3. The upper end of the groove 221 penetrates through the top of the fixed module 22, which facilitates the demolding of the turnover box 3.

[0030] The fixed module 22 has a hollow inner cavity. The top of the fixed module 22 is provided with a through hole 222 that extends downward and communicates with the inner cavity. A lifting cylinder (not shown in the figure) is provided in the inner cavity of the fixed module 22. The output end of the lifting cylinder is connected to a lifting rod 25. The lifting cylinder is used to drive the top of the lifting rod 25 to extend or retract into the through hole 222.

[0031] In the initial state, the top of the lifting rod 25 is flush with the top of the fixed module 22, which does not affect the injection molding of the turnover box 3. When the mold is opened, the upper mold base 1 drives the four moving modules 23 away from the fixed module 22, and then the lifting cylinder drives the top of the lifting rod 25 to extend out of the through hole 222, pushing the turnover box 3 upward, so that the turnover box 3 can be separated from the fixed module 22.

[0032] In this invention, the fixed module 22 (i.e., the core) and four moving modules 23 are all mounted on the lower mold base 2. When the mold is opened, the upper mold base 1 and the lower mold base 2 are separated. At this time, the fixed module 22 is still supported inside the turnover box. When the four moving modules 23 move outward, due to the support of the fixed module 22 on the inner peripheral wall of the turnover box 3, the outer peripheral wall of the turnover box 3 will not expand outward with the moving modules 23. Therefore, there will be no difficulty in demolding. The robotic arm can easily remove it from the bottom of the turnover box 3, saving time and effort.

[0033] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An injection mold for a toter, characterized by: The mold includes an upper mold base (1) and a lower mold base (2). The lower mold base (2) has a cavity (21) on one end face facing the upper mold base (1). A fixed module (22) is fixedly connected inside the cavity (21). Four moving modules (23) are movably connected around the fixed module (22) inside the cavity (21). The fixed module (22), the moving modules (23) and the upper mold base (1) enclose and form the injection cavity of the turnover box (3). A driving component is connected to the upper mold base (1) to drive the four moving modules (23) away from the fixed module (22) when the mold is opened, so as to facilitate the demolding of the turnover box (3).

2. An injection mold for a toter according to claim 1, wherein: Each of the four moving modules (23) is provided with inclined guide holes (231) that are inclined from bottom to top and outward; the driving component is a number of inclined guide posts (11) connected to the upper mold base (1) and corresponding to the inclined guide holes (231); the inclined guide posts (11) are used to be inserted into the corresponding inclined guide holes (231) and drive the corresponding moving module (23) away from or closer to the fixed module (22) when the mold is opened or closed.

3. An injection mold for a toter according to claim 2, wherein: The upper mold base (1) is provided with several vertically extending guide posts (12) on the end face facing the lower mold base (2). The lower mold base (2) is provided with guide holes (24) corresponding to the guide posts (12). The guide posts (12) are used to be inserted into the corresponding guide holes (24).

4. An injection mold for a toter according to claim 1, wherein: The fixed module (22) is arranged in a trapezoidal shape with a smaller top and a larger bottom.

5. An injection mold for a toter according to claim 4, wherein: The outer peripheral wall of the fixed module (22) is provided with a groove (221) for forming the reinforcing ribs of the inner wall of the turnover box (3), and the upper end of the groove (221) penetrates the top of the fixed module (22).

6. An injection mold for a pallet according to claim 1 or 5, characterized in that: The fixed module (22) has a hollow inner cavity. The top of the fixed module (22) is provided with a through hole (222) that extends downward and communicates with the inner cavity. A lifting cylinder is provided in the inner cavity of the fixed module (22). The output end of the lifting cylinder is connected to a lifting rod (25). The lifting cylinder is used to drive the top of the lifting rod (25) to extend or retract into the through hole (222). In the initial state, the top of the lifting rod (25) is flush with the top of the fixed module (22).

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