Upper die cooling structure and bottle cap die with same

Abstract

The upper mold cooling structure comprises a mold core fixing base, a mold core cooling base and a mold core forming insert, a first water channel I and a first water channel II are arranged in the mold core fixing base, a second water channel I and a second water channel II are arranged in the mold core cooling base, and the first water channel I and the second water channel II are communicated with the mold core forming insert. A third water channel ring groove is formed in the mold core cooling base and communicated with the second water channel I, a fourth water channel ring groove is formed in the mold core cooling base and communicated with the second water channel II, and an insert water groove is formed in the surface, close to the mold core forming insert, of the mold core cooling base and communicated with the third water channel ring groove and the fourth water channel ring groove; and the insert water tank is matched with the interior of the mold core forming insert to form an insert water channel. By means of the split type structural design, proper materials can be selected according to the functions of the assembly, the machining process of all parts is simplified, assembly and maintenance are convenient, meanwhile, the cooling efficiency is effectively improved through the design of the water channels, and the product stability of the die during continuous work is ensured.

Description

Technical Field

[0001] This invention relates to the field of mold structure, and in particular to an upper mold cooling structure and a bottle cap mold having the same structure. Background Technology

[0002] In the bottle cap production process, the cooling effect of the mold plays a crucial role in the quality and production efficiency of the bottle cap. Although bottle cap molds on the market currently employ various cooling methods, some common problems still exist. Existing bottle cap mold structures consist of an upper mold and a lower mold, with the upper mold typically serving as the main cooling component. Current molds usually employ an integral upper mold structure. In these existing molds, cooling water does not reach the top forming area, resulting in a longer bottle cap forming cycle and impacting product quality. Poor cooling can lead to bottle cap defects, resulting in poor sealing after installation and food safety issues such as beverage spoilage. Furthermore, the integral design can lead to material overuse and waste, or, in the event of wear, the entire upper mold must be scrapped and replaced as a single part, incurring extremely high costs. Summary of the Invention

[0003] The purpose of this invention is to provide an upper mold cooling structure and a bottle cap mold having the same structure, so as to solve the above-mentioned technical problems.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A cooling structure for an upper mold, comprising a core fixing seat, a core cooling base, and a core forming insert. One end of the core fixing seat is detachably connected to the core cooling base, and the core forming insert is detachably connected to the end of the core cooling base away from the core fixing seat. The core fixing seat has a first water channel and a second water channel inside, and the core cooling base has a second water channel and a second water channel inside. The first water channel and the second water channel are connected, and the first water channel and the second water channel are connected. The core cooling base has a third water channel annular groove and a fourth water channel annular groove. The third water channel annular groove is connected to the second water channel, and the fourth water channel annular groove is connected to the second water channel. An insert water channel is provided on the surface of the core cooling base near the core forming insert. The insert water channel is connected to the third water channel annular groove and the fourth water channel annular groove, and the insert water channel cooperates with the interior of the core forming insert to form an insert water channel.

[0005] Preferably, the core fixing seat has a first water channel annular groove and a second water channel annular groove at one end near the core cooling base. The first water channel annular groove is connected to the first water channel one, and the second water channel annular groove is connected to the first water channel two.

[0006] Preferably, the insert water tank includes a plurality of first water tanks arranged axially around the core cooling base and an annular second water tank connecting the plurality of first water tanks. The first water tank includes at least one first water tank and one first water tank. The first water tank is connected to a third water channel annular groove, and the first water tank is connected to a fourth water channel annular groove.

[0007] Preferably, the core cooling base includes a base fixing part, an insert fixing part, and a connecting part. The base fixing part and the insert fixing part are respectively connected to both ends of the connecting part and are integrally formed. The base fixing part is connected to the core fixing base, and the insert fixing part is connected to the core forming insert.

[0008] Preferably, the connection end of the core fixing seat and the base fixing part is provided with a mounting hole. The base fixing part includes a mounting part extending axially toward the core fixing seat and a mounting ring protruding from the outer periphery toward the core fixing seat. A groove is formed between the mounting part and the mounting ring. After the core fixing seat and the base fixing part are installed, the mounting part is inserted into the mounting hole and the end of the core fixing seat is located in the groove.

[0009] Preferably, the mounting part is provided with at least one limiting hole, the core fixing seat is provided with a fixing hole corresponding to the limiting hole, and a limiting pin is provided in the fixing hole and the limiting hole.

[0010] Preferably, the mounting part has symmetrically provided limiting grooves on its surface, the core fixing seat has a fixing hole corresponding to the limiting groove, and the fixing hole and the limiting groove are provided with limiting pins.

[0011] Preferably, the ratio of the length to the diameter of the protruding mounting portion is between 0.5 and 5.

[0012] Preferably, the first water channel one and the first water channel two have the same structure. Both the first water channel one and the first water channel two are composed of a first water hole and a second water hole. The diameter of the first water hole is larger than the diameter of the second water hole. The first water hole and the second water hole are eccentrically connected, and the projection of the second water hole along the axis of the core fixing seat is located within the projection of the first water hole along the axis of the core fixing seat.

[0013] Preferably, the surface of the core molding insert is provided with a plurality of oil grooves.

[0014] Preferably, the ratio of the length to the diameter of the core molding insert is between 0.5 and 2.5.

[0015] A bottle cap mold includes an upper mold cooling structure as described in any of the above, an inner core disposed within the upper mold cooling structure, and a first fixing seat and an anti-theft ring core for fixing the upper mold cooling structure.

[0016] The technical effects of this invention are: (1) By forming insert water channels in the insert water tank and the core molding insert, efficient cooling of the molding area is achieved. Taking the 48-cavity bottle cap mold as an example, the output is increased from 1200 pieces / minute to 1600 pieces / minute, which greatly shortens the molding cycle, improves product quality and reduces the loss of defective products, and further ensures food safety issues such as beverage spoilage.

[0017] (2) By making the core fixing seat, core cooling base and core forming insert into a split structure, each part can be manufactured and processed separately, which simplifies the manufacturing process and increases the utilization rate of materials; when one of the parts is damaged, only the damaged part needs to be repaired or replaced. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view at point B in the middle; Figure 4 This is an exploded view of the overall structure of the present invention; Figure 5 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 6 This is a schematic diagram of the core fixing base structure of the present invention; Figure 7 This is a schematic diagram of the core cooling base structure of the present invention; Figure 8 This is a schematic diagram of the core molding insert structure of the present invention.

[0019] The components in the attached diagram are labeled as follows: 1. Core fixing base; 11. First water channel one; 12. First water channel two; 13. First water channel annular groove; 14. Second water channel annular groove; 15. Fixing hole; 16. Mounting hole; 17. Dustproof ring; 2. Core cooling base; 21. Second water channel one; 22. Second water channel two; 23. Third water channel annular groove; 24. Fourth water channel annular groove; 25. Insert water channel; 25a. First water channel; 25a1. First water channel one; 25a2. First water channel two; 25b. Second 26. Water tank; 26. Base fixing part; 26a. Limiting groove; 26b. Mounting part; 26c. Mounting ring; 26d. First sealing ring; 26e. Second sealing ring; 27. Insert fixing part; 27a. Third sealing ring; 27b. External thread; 28. Connecting part; 3. Core forming insert; 31. Oil tank; 32. First clearance position; 33. Fourth sealing ring; 4. Limiting pin; 5. Inner core; 51. Second clearance position; 6. First fixing seat; 7. Anti-theft ring core. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention 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 the invention. The above descriptions are merely preferred embodiments of the invention and are not intended to limit the invention. For those skilled in the art, the invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

[0022] See Figure 1 A bottle cap mold includes a hollow upper mold cooling structure, an inner core 5 disposed inside the upper mold cooling structure, a first fixing seat 6 for fixing the upper mold cooling structure, and an anti-theft ring core 7. The upper mold cooling structure can move along the axis within the first fixing seat 6 and the anti-theft ring core 7.

[0023] See Figure 4 and Figure 5 A cooling structure for an upper mold includes a core fixing seat 1, a core cooling base 2, and a core forming insert 3. The core cooling base 2 is detachably connected to one end of the core fixing seat 1, and the core forming insert 3 is detachably fitted onto the other end of the core cooling base 2. By making the entire upper mold cooling structure a split structure, it is convenient to process the core fixing seat 1, the core cooling base 2, and the core forming insert 3 separately. Furthermore, the split structure allows for the selection of different types of materials for different functions, and damaged parts can be replaced individually, reducing material waste. Here, to ensure the cooling effect of the mold, the core forming insert 3 has a thin wall thickness. To ensure the strength of the core forming insert 3, a high-wear-resistant, high-toughness, and high-corrosion-resistance metal material is used. Since the core fixing seat 1 and the core cooling base 2 mainly play a fixing role during the entire working process, low-cost and durable materials are typically selected. In this embodiment, the core fixing seat 1 and the core cooling base 2 are made of steel.

[0024] See also Figure 5 The core fixing base 1 has a first water channel 11 and a first water channel 12 inside, both of which penetrate the upper and lower end faces of the core fixing base 1. The first water channel 11 is the first liquid inlet channel, and the first water channel 12 is the first liquid outlet channel. Both the first water channel 11 and the first water channel 12 are composed of water channels with a large diameter. The core cooling base 2 has a second water channel 21 and a second water channel 22 inside, where the second water channel 21 is the second liquid inlet channel, and the second water channel 22 is the second liquid outlet channel. Both the second water channel 21 and the second water channel 22 are composed of three independent water channels, and are symmetrically and evenly distributed inside the core cooling base 2. After the core fixing base 1 and the core cooling base 2 are assembled, the first water channel 11 and the second water channel 21 are connected, and the first water channel 12 and the second water channel 22 are connected. The second channel 22 is connected; the core cooling base 2 is provided with a third water channel annular groove 23 and a fourth water channel annular groove 24 near the bottom. The third water channel annular groove 23 and the fourth water channel annular groove 24 are both arc-shaped grooves set on the surface of the core cooling base 2. The third water channel annular groove 23 and the fourth water channel annular groove 24 are symmetrically arranged. The liquid outlet ends of the three second water channels 1 21 are connected to the third water channel annular groove 23 and are evenly distributed. The liquid inlet ends of the three second water channels 22 are connected to the fourth water channel annular groove 24 and are evenly distributed. An insert water channel 25 is opened on the side of the core cooling base 2 near the bottom. The insert water channel 25 is located below the third water channel annular groove 23 and the fourth water channel annular groove 24. The insert water channel 25 is connected to the third water channel annular groove 23 and the fourth water channel annular groove 24 respectively. After the core cooling base 2 is assembled with the core forming insert 3, the insert water channel 25 and the inner wall of the core forming insert 3 form an insert water channel. In this embodiment, the product forming area is located on the outer surface of the core forming insert 3 below the third water channel annular groove 23 and the fourth water channel annular groove 24. The outer surface of the bottom of the core forming insert 3 is provided with a thread forming structure for bottle cap forming. The coolant enters the second water channel 21 through the first water channel 11 and then flows into the insert water channel from the third water channel annular groove 23. Subsequently, it is discharged through the fourth water channel annular groove 24, the second water channel 22, and the first water channel 212. During this process, the coolant can evenly cool the thread forming structure and surrounding area of ​​the core forming insert 3. The cooling system effectively improves heat dissipation efficiency, reduces cooling cycles, and prevents product deformation or dimensional deviations caused by localized overheating. In addition, the water transport functions of the first water channel 212 and the first water channel 11 are interchangeable. That is, the first water channel 212 can be the first liquid inlet channel, and the first water channel 11 can be the first liquid outlet channel. Their functions in the whole structure are not specifically limited and can be changed according to actual operation. Similarly, the water transport functions of the second water channel 22 and the second water channel 121 can also be changed, which will not be described in detail here.

[0025] See Figure 5 and Figure 6 The core fixing seat 1 and the core cooling base 2 are connected by a first water channel annular groove 13 and a second water channel annular groove 14. The first water channel annular groove 13 and the second water channel annular groove 14 are both arc-shaped. The first water channel annular groove 13 and the second water channel annular groove 14 are respectively connected to the first water channel 11 and the first water channel 12, which are used to realize the docking of the water channel when the core fixing seat 1 and the core cooling base 2 are assembled. Both are arc-shaped groove structures with consistent depth and symmetrical distribution. The setting of the first water channel annular groove 13 and the second water channel annular groove 14 ensures that the water channel in the core fixing seat 1 and the water channel in the core cooling base 2 are connected. The problem of misalignment and failure to connect due to installation accuracy after the core fixing seat 1 and the core cooling base 2 are installed is not guaranteed, thus ensuring the connectivity between the water channels.

[0026] like Figure 5 and Figure 7 As shown, the insert water tank 25 includes ten first water tanks 25a arranged axially around the axis of the core cooling base 2, and a second water tank 25b arranged in a ring around the bottom of the first water tanks 25a. The ten first water tanks 25a are evenly distributed on the surface of the core cooling base 2. The second water tank 25b connects the ten first water tanks 25a to each other, forming a uniformly distributed coolant flow path. Among them, five first water tanks 25a are first water tank 1 25a1, which are inlet cooling tanks and flow with the third circulating water channel. The other five first water tanks 25a are first water tank 25a2, which are outlet cooling tanks and connect with the fourth water channel ring groove 24. The coolant flows from the third water channel ring groove 23 through the five first water tanks 1 25a1 into the second water tank 25b, then into the other five first water tanks 25a2, and then into the fourth water channel ring groove 24. Here, the structure of the third water channel annular groove 23 and the fourth water channel annular groove 24 can evenly distribute or merge the coolant. Through this surrounding structure design, the flow rate is evenly distributed, avoiding local stagnation or overflow, further improving the cooling uniformity, ensuring continuous and efficient cooling process, and effectively reducing the risk of thermal stress concentration. In addition, the inlet cooling tank and outlet cooling tank of the first water tank 25a are determined by which water channel in the core cooling base 2 is the second inlet water channel or the second outlet water channel. It can be assumed that the second inlet water channel is always connected to the inlet cooling tank, and the second outlet water channel is always connected to the outlet cooling tank.

[0027] Further, see Figure 5The first water channel 11 and the second water channel 12 have the same structure. Both the first water channel 11 and the second water channel 12 are composed of a first water hole and a second water hole. The diameter of the first water hole is larger than the diameter of the second water hole. The first water hole and the second water hole are eccentrically connected, and the projection of the second water hole along the axis of the core fixing seat 1 is located within the projection of the first water hole along the axis of the core fixing seat 1. Here, both the first water hole and the second water hole are water holes arranged along the axial direction of the core fixing seat 1. The diameter of the first water hole is larger than the diameter of the second water hole. The first water hole and the second water hole are flush and connected on the side closest to the center of the core fixing seat 1. The first water hole and the second water hole are arranged to prevent perforation during the processing of the first water channel, and the large diameter of the first water hole also facilitates the connection with the external coolant outlet.

[0028] See Figure 5 A dustproof groove is provided inside the end of the core fixing seat 1 away from the core cooling base 2. A dustproof ring 17 is provided inside the dustproof groove. The inner core 5 passes through the dustproof ring 17 and is in close contact with the dustproof ring 17. The design of the dustproof ring 17 can prevent condensate or dust and other impurities from entering the upper mold cooling structure, thereby ensuring smooth operation between the inner core 5 and the upper mold cooling structure during operation.

[0029] See Figure 6 and Figure 7 The core cooling base 2 consists of a base fixing part 26, an insert fixing part 27, and a connecting part 28. The base fixing part 26 and the insert fixing part 27 are connected by the connecting part 28. The base fixing part 26, the insert fixing part 27, and the connecting part 28 are an integral structure. The base fixing part 26 is connected to the core fixing base 1, and the insert fixing part 27 is used to install the core forming insert 3. The bottom of the core fixing base 1 is provided with a mounting hole 16. The base fixing part 26 includes a mounting part 26b extending axially toward the core fixing base 1 and a mounting ring 26c extending from the outer edge toward the core fixing base 1. An annular groove is formed between the mounting part 26b and the mounting ring 26c. After the core fixing base 1 and the base fixing part 26 are assembled, the bottom end of the core fixing base 1 is located in the groove. The mounting part 26b and the mounting hole 16 cooperate to achieve axial positioning, and the core fixing base 1 transitions into the groove. Here, the ratio of the length to the diameter of the mounting part 26b is between 0.5 and 5. If the length of the mounting part 26b is too short, it is easy to wobble during operation. At the same time, the machining difficulty in the groove part is too high and the clearance design needs to be considered. In this embodiment, the ratio of the length to the diameter of the mounting part 26b is 1.2, 1.5 or 2, which can solve the wobble problem while taking into account the clearance design.

[0030] Furthermore, continue to refer to Figure 5To facilitate the quick installation and disassembly of the core fixing seat 1 and the core cooling base 2, symmetrical limiting grooves 26a are provided on the surface of the mounting part 26b. The limiting grooves 26a are arranged radially along the mounting part 26b and penetrate through the side of the mounting part 26b. The core fixing seat 1 is provided with fixing holes 15 corresponding to the limiting grooves 26a. The fixing holes 15 penetrate through both sides of the core fixing seat 1, and part of the fixing holes 15 are located in the mounting holes 16. By inserting the limiting pin 4 into the fixing hole 15 and transitioning with the limiting groove 26a, the circumferential limiting and quick locking of the core fixing seat 1 and the core cooling base 2 are achieved. During disassembly, the limiting pin 4 can be pulled out to separate them. In this traditional split structure, the core fixing seat 1 and the core cooling base 2 are usually connected by threads. The threaded connection 28 may break due to continuous stress during the demolding process. By fixing the core fixing seat 1 and the core cooling base 2 with the limiting pin 4, the breakage at the connection can be effectively prevented, thus increasing the service life of the mold. At the same time, the symmetrical arrangement of the limiting groove 26a and the fixing hole 15 ensures the assembly accuracy.

[0031] In another embodiment (not shown in the figure), the mounting part 26b is provided with at least one limiting hole that penetrates the radial direction of the mounting part 26b, and the core fixing seat 1 is provided with a fixing hole 15 corresponding to the limiting hole. The fixing hole 15 penetrates the core fixing seat 1 and passes through the mounting hole 16. By inserting the limiting pin 4 into the fit between the limiting hole and the fixing hole 15, the circumferential positioning and fastening connection between the core cooling base 2 and the core fixing seat 1 is realized. In this embodiment, multiple limiting holes that do not penetrate the mounting part 26b can also be evenly provided on the mounting part 26b, and the corresponding fixing holes 15 are also provided on the core fixing seat 1. The positioning connection is realized by the limiting pin 4 passing through the fixing holes 15 in sequence and embedding into the limiting hole.

[0032] See Figure 5 A first sealing ring 26d is provided between the core fixing seat 1 and the mounting part 26b. The first sealing ring 26d is located between the mating surfaces of the mounting hole 16 and the mounting part 26b, and is located below the limiting pin 4, to prevent coolant leakage from the mating gap. At the same time, a second sealing ring 26e is provided between the core fixing seat 1 and the mounting ring 26c, forming a radial seal with the outer wall of the core fixing seat 1, effectively preventing coolant from seeping out along the outer peripheral gap. Here, because the diameter of the water channel in the core fixing seat 1 is relatively large, both the first sealing ring 26d and the second sealing ring 26e are provided on the base fixing part 26.

[0033] See Figure 5 and Figure 7Furthermore, the outer surface of the insert fixing part 27 in the core cooling base 2 is provided with an external thread 27b, and the inner side of the core forming insert 3 near the top is provided with an internal thread (not shown in the figure). The external thread 27b and the internal thread cooperate to realize the detachable connection between the core forming insert 3 and the core cooling base 2. Here, both the external thread 27b and the internal thread are high-precision fine threads. The high-precision fine threads can ensure the connection stability between the core cooling base 2 and the core insert and prevent the connection from loosening. At the same time, it avoids the problem that the traditional structure requires thread glue to fix it and cannot be disassembled. When the core cooling base 2 and the core forming insert 3 are threadedly connected, the end of the connecting part 28 of the core cooling base 2 that is close to the core forming insert 3 can be used as an end face positioning to position the core forming insert 3. At the same time, in order to avoid the external thread 27b generating extra thread segments during processing and to ensure that the assembly contact surface fits, relief grooves are provided at both ends of the external thread 27b of the core cooling base 2.

[0034] See Figure 3 and Figure 8 Because the core insert has a thin wall thickness, in order to prevent the outer surface of the core insert from deforming during the machining of the internal thread, a first clearance 32 is provided on the outer surface of the core insert corresponding to the internal thread. The first clearance 32 is provided to prevent the core insert from deforming after machining the internal thread, which would cause the operation to be unsmooth.

[0035] Continue reading Figure 8 In order to reduce wear and smooth operation of the core forming insert 3 during operation, several oil grooves 31 are provided on the surface of the core forming insert 3. The oil grooves 31 are distributed on both sides of the first clearance position 32. When the core forming insert 3 moves, the lubricating oil in the oil grooves 31 can reduce the wear between the core forming insert 3 and the anti-theft ring core 7. At the same time, it can also store the impurities generated by wear in the oil grooves 31. In addition, in order to prevent wear at the transition between the oil grooves 31 and the core forming insert 3, rounded corners are provided at the transition of the oil grooves 31.

[0036] To further reduce wear when the core molding insert 3 contacts the anti-theft ring core 7, after the core molding insert 3 is processed, an ultra-low friction coefficient coating is applied to the outer surface of the core molding insert 3. After the coating is applied, the core molding insert 3 will work more smoothly through the action of lubricating oil. In this embodiment, the coating is a diamond-like carbon coating (DLC coating) or a boron carbide coating (TAC coating).

[0037] To ensure the airtightness between the core cooling base 2 and the core molding insert 3, please refer to... Figure 5A third sealing ring 27a is provided between the positioning end face of the connecting part 28 and the threaded connection section of the core molding insert 3. The third sealing ring 27a is located on the core cooling base 2 at the end away from the molding area to prevent the cooling medium from leaking along the thread gap. Here, since the core molding insert 3 is relatively thin, the third sealing ring 27a is located on the core cooling base 2 with a larger wall thickness. In addition, the location of the third sealing ring 27a at the end away from the molding area not only prevents the problem of coolant leakage, but also prevents the problem of sealing failure caused by continuous stress on the third sealing ring 27a during the installation of the core cooling base 2 and the core molding insert 3.

[0038] Further, see Figure 5 A fourth sealing ring 33 is also provided in the molding area. The fourth sealing ring 33 is located inside the core molding insert 3 between the second water tank 25b and the end of the core cooling base 2 away from the core fixing seat 1. The fourth sealing ring 33 can prevent the cooling medium from leaking here. At the same time, the fourth sealing ring 33 is placed on the core molding insert 3 to reduce the wear of the fourth sealing ring 33 when the core molding insert 3 is installed with the core cooling base 2, and to extend its service life.

[0039] To ensure that the molding area and the threaded connection area do not interfere with each other, the length of the core molding insert 3 needs to be long enough. Typically, the ratio of the length to the diameter of the core molding insert 3 is between 0.5 and 5. In this embodiment, the ratio of the length to the diameter of the core molding insert 3 is 2.3.

[0040] To ensure the assembly accuracy of each part on the upper mold cooling structure after machining, in this embodiment, the core fixing seat 1, the core cooling base 2, and the core forming insert 3 are all provided with machining references (not shown in the figure). The core fixing seat 1, the core cooling base 2, and the core forming insert 3 are machined by machining references to ensure the machining accuracy of each component and to accurately position them after assembly.

[0041] Because the inner core 5 is relatively long, to prevent it from getting stuck during operation and to ensure its smooth movement within the upper mold cooling structure, please refer to... Figure 2 A second clearance 51 is provided on the outer surface of the inner core 5. There are two second clearances 51, which are respectively provided on the inner core 5 in the core fixing seat 1 and the core cooling base 2. The second clearance 51 can make the inner core 5 move more smoothly, collect oil and impurities, and perform exhaust function.

[0042] The cooling path of the coolant in this invention is as follows: the coolant enters through an external pipe, passes through the first water channel 11 at the bottom of the core cooling base 2, then flows through the first water channel annular groove 13 of the first water channel 11 into the second water channel 21 of the core cooling base 2, and after passing through the second water channel 21, flows into the first water tank 25a from the third water channel annular groove 23. The first water tank 25a is divided into an inlet cooling tank and an outlet cooling tank. The coolant first flows into the inlet cooling tank, and then flows into the second water tank 25b from the inlet cooling tank. After being evenly distributed in the second water tank 25b, it flows into the fourth water channel annular groove 24 from the outlet cooling tank, and then flows from the second water channel 22 to the first water channel 22 from the fourth water channel annular groove 24, and finally flows out from the first water channel 22. The outer surface of the core molding insert 3 corresponding to the inlet cooling tank, the outlet cooling tank and the second water tank 25b is the product molding area.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A cooling structure for an upper mold, comprising a core fixing seat (1), a core cooling base (2), and a core forming insert (3), characterized in that, One end of the core fixing seat (1) is detachably connected to the core cooling base (2), and the core molding insert (3) is detachably connected to the end of the core cooling base (2) away from the core fixing seat (1); the core fixing seat (1) is provided with a first water channel one (11) and a first water channel two (12), and the core cooling base (2) is provided with a second water channel one (21) and a second water channel two (22), the first water channel one (11) and the second water channel one (21) are connected, and the first water channel two (12) and the second water channel two (22) are connected; The core cooling base (2) is provided with a third water channel annular groove (23) and a fourth water channel annular groove (24). The third water channel annular groove (23) is connected to the second water channel one (21), and the fourth water channel annular groove (24) is connected to the second water channel two (22). An insert water channel (25) is provided on the surface of the core cooling base (2) near the core forming insert (3). The insert water channel (25) is connected to the third water channel annular groove (23) and the fourth water channel annular groove (24). The insert water channel (25) cooperates with the interior of the core forming insert (3) to form an insert water channel.

2. The upper mold cooling structure according to claim 1, characterized in that, The core fixing seat (1) has a first water channel annular groove (13) and a second water channel annular groove (14) at one end near the core cooling base (2). The first water channel annular groove (13) is connected to the first water channel one (11), and the second water channel annular groove (14) is connected to the first water channel two (12).

3. The upper mold cooling structure according to claim 1, characterized in that, The insert water tank (25) includes a plurality of first water tanks (25a) arranged axially around the core cooling base (2) and an annular second water tank (25b) connecting the plurality of first water tanks (25a). The first water tank (25a) includes at least one first water tank (25a1) and one first water tank (25a2). The first water tank (25a1) is connected to the third water channel annular groove (23), and the first water tank (25a2) is connected to the fourth water channel annular groove (24).

4. The upper mold cooling structure according to claim 1, characterized in that, The core cooling base (2) includes a base fixing part (26), an insert fixing part (27) and a connecting part (28). The base fixing part (26) and the insert fixing part (27) are respectively connected to both ends of the connecting part (28) and integrally formed. The base fixing part (26) is connected to the core fixing base (1), and the insert fixing part (27) is connected to the core forming insert (3).

5. The upper mold cooling structure according to claim 1, characterized in that, The connection end of the core fixing seat (1) and the base fixing part (26) is provided with a mounting hole (16). The base fixing part (26) includes a mounting part (26b) extending axially toward the core fixing seat (1) and a mounting ring (26c) protruding from the outer periphery toward the core fixing seat (1). A groove is formed between the mounting part (26b) and the mounting ring (26c). After the core fixing seat (1) and the base fixing part (26) are installed, the mounting part (26b) is inserted into the mounting hole (16) and the end of the core fixing seat (1) is located in the groove.

6. The upper mold cooling structure according to claim 5, characterized in that, The mounting part (26b) is provided with at least one limiting hole, and the core fixing seat (1) is provided with a fixing hole (15) corresponding to the limiting hole. The fixing hole (15) and the limiting hole are provided with limiting pins (4).

7. The upper mold cooling structure according to claim 5, characterized in that, The mounting part (26b) is symmetrically provided with limiting grooves (26a) on its surface. The core fixing seat (1) is provided with fixing holes (15) corresponding to the limiting grooves (26a). The fixing holes (15) and the limiting grooves (26a) are provided with limiting pins (4).

8. The upper mold cooling structure according to claim 5, characterized in that, The ratio of the length to the diameter of the protruding mounting part (26b) is between 0.5 and 5.

9. The upper mold cooling structure according to claim 1, characterized in that, The first water channel (11) and the second water channel (12) have the same structure. Both the first water channel (11) and the second water channel (12) are composed of a first water hole and a second water hole. The diameter of the first water hole is larger than the diameter of the second water hole. The first water hole and the second water hole are eccentrically connected and the projection of the second water hole along the axis of the core fixing seat (1) is located within the projection of the first water hole along the axis of the core fixing seat (1).

10. The upper mold cooling structure according to claim 1, characterized in that, The core molding insert (3) has several oil grooves (31) on its surface.

11. The upper mold cooling structure according to claim 1, characterized in that, The ratio of the length to the diameter of the core molding insert (3) is between 0.5 and 5.

12. A bottle cap mold, characterized in that, It includes the upper mold cooling structure as described in any of claims 1-11, the inner core (5) disposed within the upper mold cooling structure, and the first fixing seat (6) and the anti-theft ring core (7) for fixing the upper mold cooling structure.

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