Injection molding ejector rod and mold for bottle cap of bottled water with cooling water circulation system

Abstract

The utility model discloses a kind of injection molding ejector rod and mould of barrelled water bottle cap with cooling water circulation system, including ejector rod body, the middle position of the ejector rod body ejection end face is sunk with top break piece counterbore position, cooling water circulation channel is equipped in the ejector rod body, the cooling water circulation channel includes annular hole section in the ejection end of the ejector rod body, the annular hole section is parallel and adjacent to the ejection end face of the ejector rod body, and the annular hole section is surrounded at the periphery of the top break piece counterbore position.This utility model avoids the situation of cooling water leakage, greatly improves the production efficiency of barrelled water bottle cap, and the bottle cap yield can be further improved.

Description

Technical Field

[0001] This utility model relates to an injection molding ejector and mold for bottle caps with a cooling water circulation system. Specifically, it is an ejector and mold used in the injection molding production process of bottle caps. The ejector has a cooling water circulation system and belongs to the field of injection molding technology. Background Technology

[0002] In the production of bottled water, the bottle body and cap are injection molded separately and then assembled together. However, because bottled water caps are smaller, they are usually injection molded in batches using a single mold with multiple cavities. During demolding, ejector pins are used to eject them simultaneously, resulting in high production efficiency.

[0003] To improve the demolding efficiency of injection ejector pins for molded bottle caps, current injection ejector pins for bottle caps incorporate a built-in cooling water circulation system. This system accelerates the cooling of the molded bottle caps before demolding, significantly improving production efficiency and increasing the yield of finished products.

[0004] Because the bottle cap of bottled water has a concave circular countersunk structure at the axial center of the cap, which facilitates breaking the bottle when it is filled into a water dispenser, this countersunk plate is located at the end face of the bottle cap. However, due to the presence of this countersunk plate, a countersunk hole needs to be provided on the ejector pin during injection molding or ejection. This prevents the built-in cooling water circulation system of the ejector pin from being as close as possible to the end face of the ejector pin during injection molding. Consequently, the cooling water circulation system built into the ejector pin provides poor cooling for the molded bottle cap, affecting the production efficiency and yield of bottled water bottle caps. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this utility model proposes an injection ejector rod for bottled water caps with a cooling water circulation system. This rod is used for ejection and demolding during the injection molding production of bottled water caps, preventing cooling water leakage, greatly improving the production efficiency of bottled water caps, and further increasing the yield of bottle caps.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a bottle cap injection molding push rod with a cooling water circulation system, comprising a push rod body, wherein a countersunk hole for a rupture disc is recessed in the middle of the ejector end face of the push rod body, and a cooling water circulation channel is provided in the push rod body, the cooling water circulation channel including an annular hole segment provided in the ejector end face of the push rod body, the annular hole segment being parallel to and adjacent to the ejector end face of the push rod body, and the annular hole segment surrounding the outer periphery of the countersunk hole for the rupture disc.

[0007] Furthermore, the annular hole segment is 3mm to 6mm away from the ejector end face of the push rod body.

[0008] Furthermore, the push rod body includes the push-out end, the push rod shaft section connected to the push-out end, and the positioning end connected to the push rod shaft section. The push-out end, the push rod shaft section, and the positioning end are integrally formed into the push rod body. The cooling water circulation channel includes a cooling water inlet and outlet end disposed in the positioning end and extending to the end, a cooling water transition section disposed in the push rod shaft section, and a cooling water inclined hole section disposed in the push-out end and used to connect the annular hole section to the cooling water transition section. The cooling water inlet and outlet end, the cooling water transition section, the cooling water inclined hole section, and the annular hole section integrally form the cooling water circulation channel with a circulation loop.

[0009] Furthermore, the cooling water transition section extends to the bottom of the top rupture disc countersink position.

[0010] Furthermore, the distance between the end position of the cooling water transition section and the bottom of the adjacent top rupture disc countersink position is 3mm to 6mm.

[0011] Furthermore, the annular hole segment has an open-loop structure, and the cooling water inclined hole segments are respectively connected to the open-loop end of the annular hole segment, and their connection ports are adjacent to each other.

[0012] Furthermore, the cooling water circulation channel is integrally die-cast into the top rod body.

[0013] Furthermore, the cooling water circulation channel is integrally 3D printed into the top rod body.

[0014] Furthermore, the positioning end is provided with an inlet / outlet mounting position for external cooling water.

[0015] The cooling water circulation system is integrated into the ejector rod body and formed using die casting or 3D printing, simplifying the manufacturing process. Compared to traditional welding processes, the cooling water circulation system within the ejector rod body is less prone to leakage, ensuring the stability of the equipment during injection molding. Simultaneously, an annular orifice is provided at the ejector end of the ejector rod body, positioned around the outer periphery of the countersunk hole and close to the ejector end face. This allows the cooling water circulation system to provide maximum cooling to the bottle cap immediately after injection molding, improving production efficiency and increasing the yield rate. Finally, a cooling water transition section is located near the bottom of the countersunk hole, further assisting in cooling the molded bottle cap.

[0016] This utility model also provides a mold for injection molding production of bottle caps for bottled water, which includes the aforementioned injection molding push rod for bottle caps with a cooling water circulation system.

[0017] By using injection molding ejectors with a cooling water circulation system, the molded bottle caps are cooled and shaped to the maximum extent before being ejected from the mold, thereby improving the yield and production efficiency after ejection.

[0018] The beneficial effects of this utility model are as follows: Using the injection molding ejector pin of this invention for ejection and demolding in the injection molding production of bottle caps for bottled water simplifies the one-piece molding process, and the ejector pin itself prevents cooling water leakage; the injection mold utilizes this injection molding ejector pin to eject the molded bottle caps, greatly improving the production efficiency of bottle caps and further increasing the yield of bottle caps. Attached Figure Description

[0019] Figure 1 This is a simplified structural diagram of the present invention;

[0020] Figure 2 yes Figure 1 A simplified schematic diagram of the structure along another axis;

[0021] Figure 3 yes Figure 1 A simplified diagram of the right-side view structure;

[0022] Figure 4 yes Figure 1 A simplified schematic diagram of the central ejector end, omitting the annular hole section. Detailed Implementation

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

[0024] A sort of Figure 1-4 The bottle cap injection molding ejector with cooling water circulation system shown includes an ejector body 1. The ejector end 10 of the ejector body 1 has a countersunk hole 3 for the ejector fragment recessed in the middle position. The ejector body 1 is provided with a cooling water circulation channel 2. The cooling water circulation channel 2 includes an annular hole section 20 provided in the ejector end 10 of the ejector body 1. The annular hole section 20 is parallel to and close to the ejector end 10 of the ejector body 1, and the annular hole section 20 surrounds the outer periphery of the countersunk hole 3 for the ejector fragment recessed in the bottle cap.

[0025] In this design, the countersunk hole 3 on the ejector pin is used to shape the countersunk hole of the bottle cap during injection molding and to eject it as a whole. In practice, the depth of the countersunk hole varies among bottle caps, thus affecting the depth of the countersunk hole 3 on the ejector pin body 1. The annular hole segment in this design is novel and unaffected by the depth of the countersunk hole 3. Located at the ejector end 10 of the ejector pin body 1, the annular hole segment 20 surrounds the countersunk hole 3 and is close to the end face of the ejector end 10. This allows the cooling water within the annular hole segment 20 to maximize the cooling and shaping of the molded bottle cap. In this design, the annular hole segment 20 is 3mm to 6mm away from the end face of the ejector end 10 of the ejector pin body 1. In practical applications, the distance between the annular hole segment 20 and the end face of the ejector end 10 of the ejector pin body 1 can be determined based on specific requirements or equipment materials; for example, 3mm, 4mm, 5mm, or 6mm are all acceptable.

[0026] Depend on Figure 1 , Figure 2 As shown in the diagram, the push rod body 1 includes an ejector end 10, a push rod shaft section 11 connected to the ejector end 10, and a positioning end 12 connected to the push rod shaft section 11. The ejector end 10, the push rod shaft section 11, and the positioning end 12 are integrally formed into the push rod body 1. The cooling water circulation channel 2 includes cooling water inlet and outlet ends 22 and 23 located in the positioning end 12 and extending to the end, cooling water transition sections 21 and 24 located in the push rod shaft section 11, and cooling water inclined hole sections 25 and 26 located in the ejector end 10 for connecting the annular hole section 20 to the cooling water transition sections 21 and 24. The cooling water inlet and outlet ends 22 and 23, the cooling water transition sections 21 and 24, the cooling water inclined hole sections 25 and 26, and the annular hole section 20 are integrally formed into a cooling water circulation channel 2 with a circulation loop.

[0027] Among them, the ejector end 10, ejector shaft section 11, and positioning end 12 forming the ejector body 1 are integrally molded stepped shaft structures. During injection molding and ejection, the ejector end 10 directly contacts the molded bottle cap. In order to further improve demolding efficiency and yield, the ejector end 10 is designed with a draft angle.

[0028] like Figure 1 , 2As shown in Figure 3, the cooling water inlet end 22, cooling water transition section 21, cooling water inclined hole section 25, annular hole section 20, cooling water inclined hole section 26, cooling water transition section 24, and cooling water outlet end 23 form a continuous cooling water circulation loop channel within the push rod body 1. The cooling water inlet and outlet ends 22 and 23, and the cooling water transition sections 21 and 24 are arranged parallel to the central axis of the positioning end 12 and the push rod shaft section 11 of the push rod body 1 to reduce material costs. Of course, in actual applications, the cooling water inlet and outlet ends 22 and 23, and the cooling water transition sections 21 and 24 can also be arranged in a spiral or curved manner within the positioning end 12 and the push rod shaft section 11, according to design requirements.

[0029] To ensure effective cooling at the countersunk hole 3 of the ejector body 1, cooling water transition sections 21 and 24 are extended to the bottom of the countersunk hole 3. For example, the distance between the ends of the cooling water transition sections 21 and 24 and the bottom of their adjacent countersunk holes 3 is 3mm to 6mm. This ensures that the distance between the annular hole section 20 and the end face of the ejector end 10 of the ejector body 1 is consistent, thereby ensuring consistent cooling and shaping of the formed bottle cap by the cooling water circulation system within the ejector body 1.

[0030] The design of the annular hole segment 20 can take many forms, such as in this case. Figure 3 As shown in the diagram, the annular orifice section 20 has an open-loop structure. The cooling water inclined orifice sections 25 and 26 are connected to the open-loop end of the annular orifice section 20, and their connection points are adjacent. This ensures that the cooling water cools and shapes the end of the formed bottle cap during one cycle of circulation through the annular orifice section 20. In practical applications, based on the annular diameter of the ejector end 10 of the push rod body 1, multiple annular orifice sections 20 can be designed, or the annular orifice section 20 can be designed as a flat orifice structure to increase the heat exchange area of ​​the cooling water. The open-loop end of the annular orifice section 20 is connected to the cooling water inclined orifice sections 25 and 26.

[0031] Alternatively, the annular orifice section 20 can also be designed as a closed-loop structure, with the cooling water inclined orifice sections 25 and 26 connected to both ends of the diameter of the annular orifice section 20 of the closed-loop structure, so that the cooling water entering the annular orifice section 20 travels in two arc directions until it flows out from the other end, thus achieving the same cooling purpose.

[0032] The specific shape of the annular hole section 20 can be a regular arc or a circular structure, or it can be designed as an overall annular tortuous line structure with local non-arc parts according to the cooling heat exchange area requirements, so as to increase the end face heat exchange area of ​​the cooling water and achieve the purpose of improving cooling performance.

[0033] The inclined cooling water sections 25 and 26 within the ejector end 10 are primarily designed to connect the annular section 20 with the cooling water transition sections 21 and 24. On one hand, this creates space for the countersunk hole 3 of the ejector plate; on the other hand, it allows the inclined cooling water sections 25 and 26 to be close to the outer end face of the ejector end 10, thus improving cooling of the side circumference of the formed bottle cap. Figure 1 As shown, the inclined cooling water sections 25 and 26 converge at the near ends of the cooling water transition sections 21 and 24 to achieve consistent cooling of all parts of the formed bottle cap. Of course, in some applications, the inclined cooling water sections 25 and 26 are directly connected to the ends of the cooling water transition sections 21 and 24.

[0034] In this case, the injection-molded ejector pin can be manufactured by pre-designing the cooling water circulation system piping, which can then be used as the mandrel for positioning in the die-casting system, and the cooling water circulation channel 2 can be integrally die-cast into the ejector pin body 1. Alternatively, current 3D printing technology can be used to integrally 3D print the cooling water circulation channel 2 into the ejector pin body 1. This process is simple, provides good cooling effect, reduces the likelihood of cooling water leakage, and extends service life.

[0035] To facilitate the connection of external cooling water to the injection molding ejector pin, an inlet / outlet mounting position 27 for external cooling water is provided at the end of the positioning end 12, thereby improving the assembly capability of the equipment.

[0036] This utility model also discloses a mold for injection molding production of bottle caps for bottled water, which includes the aforementioned injection ejector pin with a cooling water circulation system. The cavity design of the bottle caps is an existing design with conventional moving and stationary mold designs, and will not be elaborated upon here. The injection ejector pin, as the ejection mechanism, utilizes the built-in cooling water circulation system to cool and solidify the molded bottle caps before demolding, improving product yield and demolding efficiency.

[0037] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A bottle cap injection molding ejector with a cooling water circulation system, comprising an ejector body (1), wherein the ejector end (10) of the ejector body (1) has a recessed hole (3) for ejector fragments at the middle position of the end face, characterized in that: The push rod body (1) is provided with a cooling water circulation channel (2). The cooling water circulation channel (2) includes an annular hole section (20) provided in the push rod body (1) at the push end (10). The annular hole section (20) is parallel to and close to the end face of the push rod body (1) at the push end (10), and the annular hole section (20) surrounds the outer periphery of the top fragment countersinking position (3).

2. The injection molding top rod for bottle caps with cooling water circulation system according to claim 1, characterized in that: The annular hole section (20) is 3mm to 6mm away from the end face of the ejector end (10) of the top rod body (1).

3. The injection molding top rod for bottle caps with a cooling water circulation system according to claim 1, characterized in that: The push rod body (1) includes the push-out end (10), the push rod shaft section (11) connected to the push-out end (10), and the positioning end (12) connected to the push rod shaft section (11). The push-out end (10), the push rod shaft section (11), and the positioning end (12) are integrally formed into the push rod body (1). The cooling water circulation channel (2) includes cooling water inlet and outlet ends (22, 23) located in the positioning end (12) and extending to the end. The cooling water transition section (21, 24) in the push rod shaft section (11), the cooling water inclined hole section (25, 26) located in the push end (10) and used to connect the annular hole section (20) to the cooling water transition section (21, 24), the cooling water inlet and outlet ends (22, 23), the cooling water transition section (21, 24), the cooling water inclined hole section (25, 26), and the annular hole section (20) are integrally formed to form the cooling water circulation channel (2) with a circulation loop.

4. The injection molding top rod for bottle caps with a cooling water circulation system according to claim 3, characterized in that: The cooling water transition section (21, 24) extends to the bottom of the top rupture countersink (3).

5. The injection molding top rod for bottle caps with a cooling water circulation system according to claim 4, characterized in that: The distance between the end position of the cooling water transition section (21, 24) and the bottom of the adjacent top rupture countersunk hole (3) is 3mm to 6mm.

6. The injection molding top rod for bottle caps with a cooling water circulation system according to claim 3, characterized in that: The annular hole section (20) has an open-loop structure. The cooling water inclined hole sections (25, 26) are respectively connected to the open-loop end of the annular hole section (20), and their connection ports are adjacent to each other.

7. The injection molding top rod for a bottle cap with a cooling water circulation system according to claim 1 or 3, characterized in that: The cooling water circulation channel (2) is integrally die-cast inside the top rod body (1).

8. The injection molding top rod for a bottle cap with a cooling water circulation system according to claim 1 or 3, characterized in that: The cooling water circulation channel (2) is integrally 3D printed inside the top rod body (1).

9. The injection molding top rod for bottle caps with a cooling water circulation system according to claim 3, characterized in that: The positioning end (12) is provided with an inlet / outlet mounting position (27) for external cooling water.

10. A mold for injection molding production of bottle caps for bottled water, characterized in that: Including the injection molding top rod of the bottle cap with cooling water circulation system as described in any one of claims 1-9.

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