Efficient reinforcement forming device for cosmetic bottle opening

Abstract

The utility model discloses an efficient reinforcement forming device for a cosmetic bottle opening. And a plurality of problems in the process of manufacturing the bottle opening from the PET bottle preform in the blow molding process are effectively solved. The device comprises forming dies which are symmetrically arranged, and forming cavities on the inner sides of the forming dies determine the shape of a bottle opening. And cooling runners are arranged in the forming die and are uniformly distributed along the outer side of the forming cavity. The semi-ring cavity cooling cavity and the inner edge cooling forming groove in the lower end inside are matched with the bottom of the forming die in shape, material flowing is guided, and the strength of the bottle opening is enhanced. The heat dissipation spacers distributed in the cooling cavity in a circumferential array mode are matched with the surface micro-channels, the heat dissipation efficiency is greatly improved, and the dimensional deviation caused by uneven cooling is solved. In addition, a guide groove and a guide column on the front side of the forming die ensure accurate opening and closing of the die and stable production. The device obviously improves the bottle opening forming quality, improves the size precision and strength, shortens the blow molding period, reduces the cost, and powerfully promotes the development of the cosmetic packaging industry.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic bottle manufacturing, specifically a high-efficiency strengthening molding device for the mouth of a cosmetic bottle. Background Technology

[0002] In the cosmetic packaging manufacturing process, blow molding is a very common method for processing PET preforms into cosmetic bottles. During this process, the forming conditions of the bottle body and the bottle neck differ significantly. Due to its larger surface area, the bottle body has a wider contact area with the mold during blow molding, allowing heat to dissipate relatively quickly, thus promoting rapid heat dissipation, molding, and solidification of the bottle material. However, the molding of the bottle neck presents many challenges. The bottle neck typically has complex shapes such as steps and threads. These complex shapes make the cooling process extremely difficult. After blow molding, during the cooling stage, the bottle body, due to its large contact area with the mold, allows the cooling medium to efficiently remove heat and achieve rapid cooling. However, at the bottle neck, due to the presence of steps, threads, and other structures, the cooling medium cannot be evenly distributed and effectively utilized. Some areas may remain at high temperatures for extended periods due to insufficient cooling, leading to continuous molecular structural changes and excessive shrinkage; while other areas may cool too quickly, generating significant internal stress. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, a highly efficient cooling system is constructed by incorporating cooling channels and a cooling cavity within the molding mold. The cooling channels are evenly distributed along the outer side of the molding cavity, effectively removing a significant amount of heat generated during the molding process. The cooling cavity, located at the lower end of the molding mold, is a semi-circular annular cavity whose shape is specifically adapted to the bottle neck molding area. Heat dissipation fins within the cooling cavity are evenly distributed in a circumferential array, with multiple sets of microchannels running through their surfaces. This significantly increases the heat dissipation area and heat exchange efficiency, allowing the cooling medium to cool the complex bottle neck structure more evenly as it flows within the cavity. This effectively improves uneven cooling, reduces dimensional deviations caused by cooling differences, and ensures the accuracy of key dimensions such as bottle neck diameter and thread pitch, guaranteeing a tight fit with the bottle cap. Simultaneously, a cooling molding groove is located at the inner edge of the cooling cavity, its shape matching the bottom shape of the molding mold. This further enhances molding control over complex areas of the bottle neck, optimizes material flow and accumulation in areas such as steps and threads, promotes uniform material fusion, enhances the consistency of the internal microstructure of the bottle neck, significantly improves bottle neck strength, and reduces the risk of breakage and deformation during handling and storage. These structural synergies ensure molding quality while significantly shortening the blow molding cycle, improving production efficiency, and reducing production costs.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency strengthening molding device for cosmetic bottle mouth, comprising symmetrically arranged molding molds, a molding cavity provided on the inner side of the molding mold, a cooling channel provided inside the molding mold, a cooling cavity provided at the lower end of the molding mold, a heat dissipation fin provided inside the cooling cavity, and multiple sets of microchannels provided through the surface of the heat dissipation fin.

[0007] Preferably, the cooling chamber is a semi-circular annular cavity, and a cooling forming groove is provided at the inner edge of the bottle mouth cooling chamber, the shape of which matches the shape of the bottom of the forming mold.

[0008] Preferably, the heat dissipation fins are arranged in a circumferential array and evenly distributed along the cooling cavity.

[0009] Preferably, the cooling channels are evenly distributed along the outer side of the molding cavity.

[0010] Preferably, a guide groove is provided on the left side of the front of the molding die, and a guide post is provided on the right side of the front of the molding die.

[0011] Preferably, the cooling channel is connected to the cooling chamber.

[0012] (III) Beneficial Effects

[0013] The purpose of this invention is to provide a high-efficiency strengthening molding device for cosmetic bottle mouths. The carefully designed cooling channels and cooling chambers inside the molding die play a crucial role in improving cooling efficiency. The cooling channels are evenly distributed on the outside of the molding chamber, initially dissipating the heat generated during blow molding. The unique semi-circular annular cavity design of the cooling chamber adapts to the complex structure of the bottle mouth. The internally arranged circumferentially arrayed heat dissipation fins, combined with multiple sets of microchannels on the surface, greatly expand the heat dissipation area, accelerating the heat exchange between the cooling medium and the bottle mouth, making the cooling process more efficient and uniform, and improving the bottle mouth size deviation problem caused by uneven cooling. From a molding quality perspective, the cooling molding grooves, whose edges fit the bottom of the molding die, precisely guide the flow of high-temperature PET material in the complex area of ​​the bottle mouth during molding, promoting uniform material accumulation and full fusion. This optimizes the internal microstructure of the bottle mouth, effectively enhancing its strength and significantly reducing the probability of breakage and deformation caused by external forces during subsequent handling and storage, thus significantly improving the product qualification rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the entire present invention.

[0015] Figure 2 This is a side sectional view of the molding die in this utility model.

[0016] Figure 3 In this utility model Figure 2Enlarged view of point A in the middle.

[0017] Figure 4 This is a top-view cross-sectional view of the molding die in this utility model.

[0018] Figure 5 This is a sectional view of the left side view of the molding die in this utility model.

[0019] Figure 6 In this utility model Figure 5 Enlarged view of point B in the middle.

[0020] In the diagram: 1-Molding mold, 2-Molding cavity, 3-Cooling channel, 4-Cooling cavity, 5-Heat dissipation fin, 6-Microchannel, 41-Cooling molding groove, 11-Guide groove, 12-Guide pillar, X-Cosmetic bottle. Detailed Implementation

[0021] The following will refer to the appendix in the example of this utility model. Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figures 1-6 As shown, this utility model provides a high-efficiency strengthening molding device for cosmetic bottle mouth, including a molding mold 1 symmetrically arranged, a molding cavity 2 is provided on the inner side of the molding mold 1, a cooling channel 3 is provided inside the molding mold 1, a cooling cavity 4 is provided at the lower end of the molding mold 1, a heat dissipation fin 5 is provided inside the cooling cavity 4, and multiple sets of microchannels 6 are provided through the surface of the heat dissipation fin 5.

[0023] As the key load-bearing structure of the entire device, the symmetrically arranged molding mold 1 provides external constraint space for the forming of the cosmetic bottle neck. Its inner forming cavity 2 directly determines the final shape and dimensional accuracy of the bottle neck. During the blow molding process, the high-temperature PET preform is blow-molded within the forming cavity 2. Precise mold design ensures accurate forming of complex bottle neck shapes, such as steps. The guide groove 11 on the left side and the guide post 12 on the right side of the molding mold 1 play important positioning and guiding roles during mold opening and closing. When the mold is closed, the guide post 12 accurately engages with the guide groove 11, ensuring precise alignment of the two symmetrically arranged molding molds 1 and complete overlap of the forming cavities 2, guaranteeing the accuracy of the bottle neck forming. When the mold is opened, the guiding structure allows the molding molds 1 to separate smoothly, preventing damage to the formed bottle neck due to misalignment and ensuring the stability and reliability of the production process.

[0024] Cooling channels 3 are located inside the molding mold 1 and are evenly distributed along the outer side of the molding cavity 2. Their main function is to rapidly dissipate heat during the initial stage of blow molding. Through the circulating cooling medium, cooling channels 3 quickly remove the large amount of heat generated during the molding process, reducing the mold temperature and creating favorable conditions for subsequent cooling processes. Simultaneously, cooling channels 3 are interconnected with the cooling cavity 4, achieving rational distribution and coordinated operation of the cooling medium. The medium, initially cooled by cooling channels 3, enters the cooling cavity 4 for further precise cooling of the bottle neck, forming a highly efficient two-stage cooling system. This improves overall cooling efficiency, shortens the blow molding cycle, and increases production efficiency.

[0025] The cooling chamber 4 is located at the lower end of the molding mold 1, and has a semi-circular annular structure. It conforms to the annular structure of the bottle mouth, ensuring that the cooling medium acts evenly and comprehensively around the bottle mouth, effectively avoiding cooling dead zones. The cooling molding groove 41 at the inner edge matches the shape of the bottom of the molding mold 1. During bottle mouth molding, it guides and constrains the flow of high-temperature PET material. The cooling molding groove 41 promotes uniform material distribution in complex areas such as steps and threads, ensuring full material fusion, optimizing the internal microstructure of the bottle mouth, significantly enhancing the bottle mouth strength, and greatly reducing the risk of breakage or deformation due to external forces during subsequent use.

[0026] Heat dissipation fins 5 are distributed inside the cooling chamber 4 in a circumferential array. Their primary function is to strengthen the cooling chamber 4, and secondly, to increase the heat dissipation area within it. When the cooling medium flows through the heat dissipation fins 5, heat is rapidly transferred from the bottle neck to the cooling medium, accelerating the curing of the bottle neck material. This uniformly distributed design ensures a more even flow of the cooling medium throughout the entire cooling chamber 4, guaranteeing consistent cooling rates at all parts of the bottle neck. This effectively solves the dimensional deviation problem caused by uneven cooling, ensuring the dimensional accuracy of the bottle neck, allowing for a tight fit between the bottle neck and cap, and improving product sealing.

[0027] Microchannels 6 are disposed throughout the surface of the heat dissipation fin 5, and multiple sets of microchannels 6 further refine the flow path of the cooling medium. They enable the cooling medium to form a more complex and uniform flow state on the surface of the heat dissipation fin 5, enhance the convective heat transfer effect, make heat transfer more efficient, and precisely control the cooling rate of various parts of the bottle mouth, ensuring the cooling consistency of complex shape areas of the bottle mouth, thereby improving the molding quality and strength of the bottle mouth.

[0028] Working principle:

[0029] In the blow molding process, after this device is installed inside the mold, the specific working process is as follows: First, the preheated PET preform is precisely placed in the molding cavity 2, which is formed by the inner side of the symmetrical molding mold 1. At this time, the guide groove 11 on the left side of the front of the molding mold 1 and the guide post 12 on the right side cooperate with each other to ensure that the two molding molds 1 are precisely aligned, thereby ensuring the integrity and accuracy of the shape of the molding cavity 2, providing a stable spatial foundation for the subsequent molding of the preform to the bottle neck.

[0030] Next, the blow molding process begins, and high-pressure air is injected into the PET preform. As the preform gradually expands under high pressure, the cooling channels 3, evenly distributed along the outer side of the molding cavity 2, simultaneously begin to operate. The cooling medium circulating within the cooling channels 3 quickly removes the large amount of heat generated in the initial stage of blow molding, effectively reducing the mold temperature. The cooling cavity 4 is a semi-circular annular cavity that perfectly fits the annular structure of the bottle neck. As the expanding preform material gradually extends to the bottle neck, the cooling molding groove 41, whose shape matches the bottom of the molding mold 1, begins to function at the inner edge of the cooling cavity 4. It promotes the even distribution of material in complex areas such as steps and threads at the bottle neck, ensuring full material fusion, optimizing the internal microstructure of the bottle neck, significantly enhancing the strength of the bottle neck, and reducing the risk of breakage and deformation during subsequent use. At the same time, the heat dissipation baffles 5, evenly distributed in a circumferential array within the cooling cavity 4, also play an active role. When the cooling medium flows through the heat dissipation baffles 5, heat is rapidly transferred from the bottle neck to the cooling medium, accelerating the curing of the bottle neck material. The evenly distributed heat dissipation fins 5 make the cooling medium flow more evenly in the cooling chamber 4, ensuring that the cooling rate of each part of the bottle mouth is consistent, effectively solving the problem of dimensional deviation caused by uneven cooling, ensuring the dimensional accuracy of the bottle mouth, and improving the compatibility with the bottle cap and the product sealing performance.

[0031] When blow molding is complete and the mold needs to be opened to remove the formed bottle opening, the guide groove 11 and guide post 12 play their role again, so that the molding mold 1 can be separated smoothly, avoiding damage to the formed bottle opening due to misalignment, and ensuring that the entire production process operates efficiently, stably and reliably.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency reinforcing molding device for cosmetic bottle mouths, comprising symmetrically arranged molding molds (1), wherein the inner side of the molding molds (1) is provided with molding cavities (2), characterized in that, The molding mold (1) is provided with a cooling channel (3) inside, and a cooling cavity (4) is provided at the lower end of the molding mold (1). A heat dissipation fin (5) is provided inside the cooling cavity (4), and multiple sets of microchannels (6) are provided through the surface of the heat dissipation fin (5). The cooling cavity (4) is a semi-circular annular cavity. A cooling forming groove (41) is provided at the inner edge of the bottle mouth cooling cavity (4). The shape of the cooling forming groove (41) matches the bottom shape of the forming mold (1).

2. The high-efficiency reinforcing molding device for the mouth of a cosmetic bottle according to claim 1, characterized in that, The heat dissipation fins (5) are arranged in a circumferential array and evenly distributed along the cooling cavity (4).

3. The high-efficiency reinforcing molding device for the mouth of a cosmetic bottle according to claim 1, characterized in that, The cooling channels (3) are evenly distributed along the outer side of the molding cavity (2).

4. The high-efficiency reinforcing molding device for the mouth of a cosmetic bottle according to claim 1, characterized in that, A guide groove (11) is provided on the left side of the front of the molding mold (1), and a guide post (12) is provided on the right side of the front of the molding mold (1).

5. The high-efficiency reinforcing molding device for the mouth of a cosmetic bottle according to claim 1, characterized in that, The cooling channel (3) is connected to the cooling chamber (4).

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