Blow bottle cooling bottom mold and bottle body production line

Abstract

The utility model provides a kind of bottle blowing cooling bottom die and bottle body production line, it is related to mould technical field, including: integrated bottom die body and cooling structure, bottom die body includes installation part and the cooling portion being set on the side end face of installation part, connection structure is equipped on installation part, the side of cooling portion deviating from installation part is equipped with bottle bottom forming surface, bottle bottom forming surface is used to abut on bottle bottom;Cooling structure includes the liquid inlet and liquid outlet being set on the other side end face of installation part and the cooling flow channel being set in bottom die body, the both ends of cooling flow channel are respectively communicated liquid inlet and liquid outlet, at least part cooling flow channel is laid below bottle bottom forming surface and is set with bottle bottom forming surface interval preset distance arrangement.The utility model is set with integrated type, so that cooling flow channel can be according to design requirement maximum limitly spread entire bottom die body position close to bottle bottom forming surface, to significantly improve cooling efficiency and uniformity.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a blow molding cooling bottom mold and a bottle production line. Background Technology

[0002] In the blow molding process of plastic bottles, the performance of the mold's heat exchange system directly affects the molding quality and production efficiency. Because different types of plastic bottles have significant differences in structure and shape, especially at the bottom, the design of the cooling system must be optimized to suit the specific characteristics of the product. Currently, most blow molding dies adopt a split structure, with internal cooling water channels often designed as annular channels, which has cooling limitations and cannot flexibly adapt to diverse product requirements. For example, in the blow molding process of PET bottles, the preform, in a thermoelastic state, is stretched and blown under high pressure, then adheres tightly to the inner wall of the mold, and its shape is fixed through cooling and shaping. In this process, the cooling efficiency of the bottom mold is particularly critical, affecting not only the overall molding quality of the bottle but also playing a decisive role in the cooling effect of the complex bottom area. To improve cooling performance, traditional methods typically use aluminum alloy materials with high thermal conductivity, combined with complex water channel structures such as annular rectangular water channels to enhance heat transfer efficiency. However, limited by traditional machining processes, even the most sophisticated cooling water system structures struggle to achieve uniform and efficient cooling of the bottle bottom area, leading to uneven cooling or insufficient cooling efficiency in certain areas. This, in turn, affects product molding quality and production cycle time. Therefore, improving the cooling uniformity and efficiency of the bottom mold to enhance bottle quality and production efficiency has become a pressing technical problem. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a blow molding cooling bottom mold and a bottle production line to improve cooling uniformity and cooling efficiency, thereby improving bottle quality and production efficiency.

[0004] The above-mentioned objective of this utility model can be achieved by the following technical solution: This utility model provides a blow molding cooling bottom mold, comprising:

[0005] An integrated bottom mold body includes an installation part and a cooling part disposed on one side end face of the installation part. The installation part is provided with a connecting structure, and the cooling part is provided with a bottle bottom forming surface on the side opposite to the installation part. The bottle bottom forming surface is used to abut against the bottle bottom.

[0006] The cooling structure includes an inlet and an outlet on the other end face of the mounting portion, and a cooling channel in the bottom mold body. The two ends of the cooling channel are connected to the inlet and the outlet, respectively. At least a portion of the cooling channel is laid below the bottom forming surface of the bottle and is spaced at a predetermined distance from the bottom forming surface of the bottle.

[0007] In a preferred embodiment of the present invention, the bottom mold body is integrally formed by 3D printing, and the cooling structure is simultaneously formed on the bottom mold body during the 3D printing process.

[0008] In a preferred embodiment of this utility model, the preset distance is no greater than 5mm.

[0009] In a preferred embodiment of this utility model, the total projected area of ​​the cooling channels laid below the bottle bottom forming surface along the height direction is not less than 70% of the projected area of ​​the bottle bottom forming surface.

[0010] In a preferred embodiment of the present invention, the other end face of the mounting part is provided with a mounting groove, and the liquid inlet and the liquid outlet are both located at the bottom of the mounting groove.

[0011] In a preferred embodiment of the present invention, the liquid inlet is located in the middle of the mounting groove, and the liquid outlet is located on the outside of the liquid inlet.

[0012] In a preferred embodiment of the present invention, the connection structure includes a plurality of mounting holes disposed on the mounting portion, the plurality of mounting holes being arranged in a circumferential manner around the mounting groove at intervals.

[0013] In a preferred embodiment of the present invention, the bottle bottom forming surface is gradually raised from the side edge to the center, and a boss is formed in the center of the bottle bottom forming surface. The cooling channel includes a first cooling section disposed below the center of the bottle bottom forming surface, and a second cooling section and a third cooling section respectively connecting the two ends of the first cooling section. The second cooling section is connected to the liquid inlet, and the third cooling section is connected to the liquid outlet. At least a portion of the second cooling section is arranged in a conformal shape around the boss and / or at least a portion of the third cooling section is arranged in a conformal shape around the boss.

[0014] In a preferred embodiment of the present invention, the second cooling section is configured by bending to form a plurality of first arc segments spaced apart from the inside to the outside; and / or, the third cooling section is configured by bending to form a plurality of second arc segments spaced apart from the inside to the outside.

[0015] In a preferred embodiment of this invention, the height of the cooling channel gradually decreases along the direction away from the boss.

[0016] In a preferred embodiment of the present invention, the bottle bottom forming surface further includes a slope surrounding the boss, and a plurality of rib grooves are spaced apart on the slope, the rib grooves being used to match the bottle bottom.

[0017] In a preferred embodiment of the present invention, the mounting portion is cylindrical, and the cooling portion is cylindrical and disposed in the middle of the mounting portion.

[0018] This utility model also provides a bottle production line, including the aforementioned blow molding cooling bottom mold.

[0019] The technical solution of this utility model has the following significant beneficial effects:

[0020] The blow molding cooling bottom mold of this invention adopts an integrated bottom mold body, and the cooling structure can be synchronously integrated into the bottom mold body. Through flexible arrangement of the cooling structure, the cooling channels can be distributed to the maximum extent possible across the entire bottom mold body near the bottle bottom forming surface, thereby significantly improving cooling efficiency and uniformity. This overcomes the limitations of traditional machining methods that struggle to achieve complex channel layouts, providing a novel solution for optimizing mold cooling performance. The blow molding cooling bottom mold of this invention offers better cooling uniformity and efficiency, contributing to improved bottle quality and production efficiency, and possesses promising prospects and industrial application value. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0023] Figure 1 This is a top view of one embodiment of the blow molding cooling bottom mold of this utility model;

[0024] Figure 2 forFigure 1 Sectional view of section AA;

[0025] Figure 3 This is a perspective structural diagram of one embodiment of the blow molding cooling bottom mold of this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of one embodiment of the cooling channel described in this utility model.

[0027] The reference numerals in the above figures are as follows:

[0028] 100. Bottom mold body;

[0029] 110. Installation section; 111. Installation slot;

[0030] 120. Cooling section; 121. Bottle bottom forming surface; 1211. Boss; 1212. Sloping surface; 1213. Rib groove;

[0031] 130. Connection structure; 131. Mounting hole;

[0032] 200. Cooling structure;

[0033] 210. Liquid inlet;

[0034] 220. Liquid outlet;

[0035] 230. Cooling flow channel;

[0036] 231. First cooling section;

[0037] 232. Second cooling section; 2321. First arc segment;

[0038] 233, Third Cooling Section; 2331, Second Arc Section. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Implementation Method 1

[0041] Please refer to the following: Figures 1 to 4As shown, an embodiment of this utility model provides a blow molding cooling bottom mold, which includes an integral bottom mold body 100 and a cooling structure 200. The bottom mold body 100 includes a mounting part 110 and a cooling part 120 disposed on one side end face of the mounting part 110. The mounting part 110 is provided with a connecting structure 130. The cooling part 120 is provided with a bottle bottom forming surface 121 on the side opposite to the mounting part 110, and the bottle bottom forming surface 121 is used to abut against the bottle bottom. The cooling structure 200 includes an inlet 210 and an outlet 220 disposed on the other side end face of the mounting part 110, and a cooling channel 230 disposed in the bottom mold body 100. The two ends of the cooling channel 230 are respectively connected to the inlet 210 and the outlet 220. At least a portion of the cooling channel 230 is laid below the bottle bottom forming surface 121 and is disposed at a predetermined distance from the bottle bottom forming surface 121.

[0042] Overall, this blow molding cooling bottom mold adopts an integrated bottom mold body 100, and the cooling structure 200 can be synchronously integrated within the bottom mold body 100. By flexibly arranging the cooling structure 200, the cooling channels 230 can be distributed to the maximum extent possible across the entire bottom mold body 100 near the bottle bottom forming surface 121, according to design requirements. This significantly improves cooling efficiency and uniformity, and overcomes the limitations of traditional machining methods that struggle to achieve complex channel layouts. It provides a novel solution for optimizing mold cooling performance. This novel blow molding cooling bottom mold offers better cooling uniformity and efficiency, contributing to improved bottle quality and production efficiency, and possesses promising prospects and industrial application value.

[0043] In the embodiments of this utility model, such as Figure 3 In the embodiment shown, the bottom mold body 100 is integrally formed by 3D printing. During the 3D printing process of the bottom mold body 100, the cooling structure 200 is simultaneously formed on the bottom mold body 100.

[0044] The bottom mold body 100 was integrally formed using 3D printing technology. During the printing process of the bottom mold body 100, the cooling structure 200 was simultaneously formed inside the bottom mold body 100, eliminating the need for subsequent processing and assembly. This not only greatly simplifies the complex process of traditional mold manufacturing but also achieves a high-precision layout of the cooling channels 230, enabling the cooling channels 230 to be close to the bottom forming surface 121 of the bottle and evenly distributed, thereby improving cooling efficiency and uniformity, reducing product deformation and shrinkage defects, and significantly enhancing the performance and production efficiency of the blow molding cooling bottom mold.

[0045] Designers can adjust the 3D printing material of the base mold body 100 according to usage needs, without specific limitations. For example, in one feasible embodiment, the 3D printing material is a metallic material. In another feasible embodiment, the 3D printing material is a non-metallic material.

[0046] In the embodiments of this utility model, such as Figure 2 In the illustrated embodiment, the designer can adjust the specific size of the preset distance according to the usage requirements, and no specific limitation is made here. Preferably, the preset distance is no greater than 5mm.

[0047] By setting the cooling channel 230 within a range of no more than 5 mm from the bottom forming surface 121, the length of the heat transfer path is reduced, the cooling response speed is accelerated, and the cooling cycle is shortened.

[0048] Furthermore, by laying out cooling channels 230 over the largest possible area, cooling efficiency and uniformity can be further improved, making the temperature distribution on the mold surface more even, effectively avoiding product deformation or shrinkage defects caused by local thermal stress concentration, and improving production efficiency and product quality.

[0049] In one feasible embodiment, the preset distance is approximately 5 mm. In another feasible embodiment, the preset distance is approximately 3 mm. In yet another feasible embodiment, the preset distance is approximately 1 mm.

[0050] In an embodiment of this utility model, the total projected area of ​​the cooling channels 230 laid below the bottle bottom forming surface 121 along the height direction is not less than 70% of the projected area of ​​the bottle bottom forming surface 121.

[0051] By laying the cooling channel 230 below the bottle bottom forming surface 121, and ensuring that the total projected area of ​​the cooling channel 230 is not less than 70% of the projected area of ​​the bottle bottom forming surface 121, the cooling coverage and heat exchange efficiency are significantly improved. This makes the cooling effect of the cooling channel 230 more comprehensive and uniform, effectively reducing the risk of thermal stress deformation caused by uneven cooling, further improving the product forming quality and dimensional stability, while also accelerating the cooling speed and shortening the production cycle.

[0052] Designers can adjust the specific proportion of the projected area according to usage needs, and no specific restrictions are imposed here. In one feasible embodiment, the total projected area of ​​the cooling channel 230 laid below the bottle bottom forming surface 121 is approximately 70% of the projected area of ​​the bottle bottom forming surface 121.

[0053] In one feasible embodiment, the total projected area of ​​the cooling channel 230 laid below the bottle bottom forming surface 121 is approximately 80% of the projected area of ​​the bottle bottom forming surface 121.

[0054] In one feasible embodiment, the total projected area of ​​the cooling channel 230 laid below the bottle bottom forming surface 121 is approximately 90% of the projected area of ​​the bottle bottom forming surface 121.

[0055] In the embodiments of this utility model, such as Figure 2In the embodiment shown, the other end face of the mounting part 110 is provided with a mounting groove 111, and the liquid inlet 210 and the liquid outlet 220 are both located at the bottom of the mounting groove 111.

[0056] The mounting groove 111 is used for positioning and installation. Specifically, it also includes a supporting device for use with the blow molding cooling bottom mold. The supporting device has a raised mounting block that can be inserted into the mounting groove 111 to achieve positioning and installation. Furthermore, the supporting device is also provided with a liquid inlet channel and a liquid outlet channel. The liquid inlet channel passes through the mounting part and connects to the liquid inlet 210, and the liquid outlet channel passes through the mounting part and connects to the liquid outlet 220.

[0057] By providing a mounting groove 111 on the other end face of the mounting portion 110, and placing the liquid inlet 210 and the liquid outlet 220 at the bottom of the mounting groove 111, the inlet and outlet layout of the cooling medium is made more compact and easier to connect. Furthermore, the side edge of the mounting portion 110 located on the side of the mounting groove 111 can be used to achieve a connection function, avoiding interference with the liquid inlet 210 and the liquid outlet 220.

[0058] Furthermore, in one feasible embodiment, the side edge of the mounting portion 110 located on the side of the mounting groove 111 can also cooperate with the seal to achieve a sealing effect.

[0059] In an embodiment of this utility model, the liquid inlet 210 is located in the middle of the mounting groove 111, and the liquid outlet 220 is located on the outside of the liquid inlet 210.

[0060] By setting the liquid inlet 210 in the middle of the mounting groove 111 and the liquid outlet 220 on the outside of the liquid inlet 210, the cooling medium can flow from the central area to the periphery, forming a more uniform cooling path. This helps to improve cooling efficiency and temperature distribution uniformity, and reduces the risk of mold deformation caused by thermal stress concentration.

[0061] In the embodiments of this utility model, such as Figure 1 In the embodiment shown, the connection structure 130 includes a plurality of mounting holes 131 disposed on the mounting portion 110, the plurality of mounting holes 131 being arranged in a spaced-apart ring around the mounting groove 111.

[0062] By providing multiple mounting holes 131 arranged in a circumferential pattern around the mounting groove 111 on the mounting part 110, the multiple mounting holes 131 can cooperate to play a positioning role and improve the uniformity of connection, thereby improving the stability and reliability of assembly, reducing the risk of loosening or deformation caused by uneven force, and facilitating installation and disassembly, thus improving maintenance efficiency.

[0063] Designers can adjust the number and arrangement of the multiple mounting holes 131 according to usage needs, and no specific limitations are imposed here. In one feasible embodiment, three, four or more mounting holes 131 are provided, and the multiple mounting holes 131 are arranged in a ring at intervals. The mounting holes 131 can cooperate with bolts or other connecting parts to stably fix the blow molding cooling bottom mold.

[0064] In the embodiments of this utility model, such as Figure 2 , Figure 3 and Figure 4 In the embodiment shown, the bottle bottom forming surface 121 is gradually raised from the side edge to the center, and a boss 1211 is formed in the center of the bottle bottom forming surface 121. The cooling channel 230 includes a first cooling section 231 disposed below the center of the bottle bottom forming surface 121, and a second cooling section 232 and a third cooling section 233 respectively connecting the two ends of the first cooling section 231. The second cooling section 232 is connected to the liquid inlet 210, and the third cooling section 233 is connected to the liquid outlet 220. At least a portion of the second cooling section 232 is arranged in a conformal shape around the boss 1211 and / or at least a portion of the third cooling section 233 is arranged in a conformal shape around the boss 1211.

[0065] By making the bottle bottom forming surface 121 gradually bulge from the side edge towards the center and forming a boss-like structure 1211 in the center, a ring-shaped support area with an outer convex and inner concave shape can be formed during the bottle bottom forming process, optimizing the stress distribution of the bottle bottom and thus significantly improving the structural strength and support stability of the bottle bottom. Furthermore, by cooperating with the cooling channel 230, the cooling effect is more uniform and efficient, reducing the risk of deformation caused by uneven cooling shrinkage.

[0066] Specifically, the first cooling section 231 can specifically cool the central boss 1211 area of ​​the bottle bottom forming surface 121. However, in the prior art, a cooling channel 230 is usually not provided in the boss 1211 area, resulting in low cooling efficiency in the boss 1211 area, which affects the forming quality of the central part of the bottle bottom.

[0067] Furthermore, at least a portion of the second cooling section 232 or at least a portion of the third cooling section 233 is arranged in a conformal manner around the boss 1211, which further improves the cooling uniformity and efficiency of the area surrounding the boss 1211, thereby ensuring the cooling uniformity of the entire bottle bottom forming surface 121, reducing the risk of deformation caused by uneven cooling, improving product quality and dimensional accuracy, and improving the forming quality of the bottle bottom.

[0068] Designers can adjust the shape and structure of the second cooling section 232 and the third cooling section 233 according to usage requirements; no specific limitations are imposed here. For example, such as Figure 4In the embodiment shown, the second cooling section 232 is configured to form multiple arc segments spaced apart from the inside out by bending; and / or, the third cooling section 233 is configured to form multiple arc segments spaced apart from the inside out by bending.

[0069] Preferably, the second cooling section 232 is configured by bending to form a plurality of first arc segments 2321 spaced apart from the inside to the outside; the third cooling section 233 is configured by bending to form a plurality of second arc segments 2331 spaced apart from the inside to the outside.

[0070] By bending the second cooling section 232 and the third cooling section 233 to form multiple arc segments distributed from the inside out, the flow path of the cooling medium can be effectively extended, and the coverage area of ​​the cooling channel 230 on the bottle bottom forming surface 121 can be increased, thereby improving the cooling uniformity.

[0071] Furthermore, the arc-shaped structure helps reduce fluid flow resistance, improves the flow efficiency of the cooling medium, thereby improving cooling efficiency and heat exchange effect, and reducing the risk of shrinkage and deformation caused by local temperature differences.

[0072] More preferably, such as Figure 4 In the embodiment shown, the installation height of the cooling channel 230 gradually decreases along the direction away from the boss 1211.

[0073] By controlling the height of the cooling channel 230, the cooling channel 230 can better match the geometric structure of the bottle bottom forming surface 121, which gradually decreases from the central boss 1211 to the side edge. This makes the spacing between the cooling channel 230 and each area of ​​the bottle bottom forming surface 121 approximately equal, thereby improving the heat conduction balance between the cooling channel 230 and the bottle bottom forming surface 121. This effectively controls the temperature gradient in each area of ​​the bottle bottom forming surface 121, reduces local overcooling or overheating, further improves cooling uniformity, reduces the risk of deformation, and thus ensures the forming quality and production stability of the bottle bottom.

[0074] In one specific embodiment, the height of the plurality of first arc segments 2321 of the second cooling section 232 gradually decreases from the inside to the outside, and the height of the plurality of second arc segments 2331 of the third cooling section 233 gradually decreases from the inside to the outside.

[0075] In the embodiments of this utility model, such as Figure 1 and Figure 2 In the embodiment shown, the bottom forming surface 121 of the bottle also includes a slope 1212 surrounding the boss 1211, and a plurality of rib grooves 1213 are provided on the slope 1212 at intervals.

[0076] By setting multiple spaced circumferential rib grooves 1213 on the slope 1212, the rib grooves 1213 can be used to form the support part of the bottle bottom, thereby enhancing the structural strength and support stability during the forming of the bottle bottom.

[0077] In an embodiment of this utility model, the mounting part 110 is cylindrical, and the cooling part 120 is cylindrical and disposed in the middle of the mounting part 110.

[0078] The cylindrical mounting part 110 and cooling part 120 have good structural stability and exhibit high compressive strength when subjected to axial loads, effectively preventing deformation or damage caused by external forces.

[0079] Furthermore, the cylindrical structure is easy to process and manufacture, especially in mold design, where its regular geometric shape is beneficial for machining, assembly, and subsequent maintenance.

[0080] Furthermore, the cylindrical structure helps optimize heat conduction paths, resulting in more even heat distribution, making it particularly suitable for applications requiring efficient heat dissipation or centralized cooling. In addition, the cylindrical structure is more compact in its space utilization, effectively saving installation space and improving overall space utilization and functionality.

[0081] Implementation Method 2

[0082] An embodiment of this utility model discloses a bottle production line, which includes a blow molding cooling bottom mold as described in Embodiment 1. The specific structure, working principle, and beneficial effects of the blow molding cooling bottom mold are the same as those described in Embodiment 1, and will not be repeated here.

[0083] The bottle production line described in this invention achieves better cooling uniformity and efficiency by using a blow molding cooling bottom mold, which helps to improve bottle quality and production efficiency.

[0084] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A blow molding cooling bottom mold, characterized in that, include: An integrated bottom mold body includes an installation part and a cooling part disposed on one side end face of the installation part. The installation part is provided with a connecting structure, and the cooling part is provided with a bottle bottom forming surface on the side opposite to the installation part. The bottle bottom forming surface is used to abut against the bottle bottom. The cooling structure includes an inlet and an outlet on the other end face of the mounting portion, and a cooling channel in the bottom mold body. The two ends of the cooling channel are connected to the inlet and the outlet, respectively. At least a portion of the cooling channel is laid below the bottom forming surface of the bottle and is spaced at a predetermined distance from the bottom forming surface of the bottle.

2. The blow molding cooling bottom mold as described in claim 1, characterized in that, The bottom mold body is 3D printed as a single piece, and the cooling structure is formed simultaneously on the bottom mold body during the 3D printing process.

3. The blow molding cooling bottom mold as described in claim 1, characterized in that, The preset distance is no greater than 5mm.

4. The blow molding cooling bottom mold as described in claim 1, characterized in that, Along the height direction, the total projected area of ​​the cooling channels laid below the bottle bottom forming surface is not less than 70% of the projected area of ​​the bottle bottom forming surface.

5. The blow molding cooling bottom mold as described in claim 1, characterized in that, The other end face of the mounting part is provided with a mounting groove, and the liquid inlet and the liquid outlet are both located at the bottom of the mounting groove.

6. The blow molding cooling bottom mold as described in claim 5, characterized in that, The liquid inlet is located in the middle of the mounting groove, and the liquid outlet is located on the outside of the liquid inlet.

7. The blow molding cooling bottom mold as described in claim 5, characterized in that, The connection structure includes a plurality of mounting holes disposed on the mounting portion, the plurality of mounting holes being arranged in a circumferential arrangement around the mounting groove at intervals.

8. The blow molding cooling bottom mold as described in claim 1, characterized in that, The bottom forming surface of the bottle gradually rises from the side edge to the center, and a boss is formed in the center of the bottom forming surface. The cooling channel includes a first cooling section disposed below the center of the bottom forming surface, and a second cooling section and a third cooling section respectively connecting the two ends of the first cooling section. The second cooling section is connected to the liquid inlet, and the third cooling section is connected to the liquid outlet. At least a portion of the second cooling section is arranged in a conformal shape around the boss and / or at least a portion of the third cooling section is arranged in a conformal shape around the boss.

9. The blow molding cooling bottom mold as described in claim 8, characterized in that, The second cooling section includes a plurality of first arc segments that are bent and spaced apart from the inside to the outside; and / or, the third cooling section includes a plurality of second arc segments that are bent and spaced apart from the inside to the outside.

10. The blow molding cooling bottom mold as described in claim 8, characterized in that, The height of the cooling channel gradually decreases along the direction away from the boss.

11. The blow molding cooling bottom mold as described in claim 8, characterized in that, The bottom forming surface of the bottle also includes a slope surrounding the boss, and multiple rib grooves are spaced apart on the slope.

12. The blow molding cooling bottom mold as described in claim 1, characterized in that, The mounting section is cylindrical, and the cooling section is cylindrical and located in the middle of the mounting section.

13. A bottle production line, characterized in that, Includes the blow molding cooling bottom mold as described in any one of claims 1 to 12.

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