Core rod assembly

Abstract

The utility model relates to the field of container production, and particularly provides a core rod assembly which comprises a core rod body, a core rod base, a core rod sleeve and a cooling pipe, the core rod body is used for forming the inner wall of a bottle blank and comprises a heat conduction wall and a first exhaust groove, the heat conduction wall is attached to the bottle blank, the first exhaust groove is formed in the middle of a core rod, and the core rod body is installed in the core rod base; the core rod seat is arranged on the core rod body so as to support the core rod body through the core rod seat, the core rod sleeve is arranged between the core rod body and the core rod seat so as to fix the core rod seat and the core rod body, and the cooling pipe penetrates into the core rod body so as to cool the core rod body. According to the utility model, the problem that the forming of the bottle blank is influenced because the bottle blank is not cooled in time and the gas is not exhausted in time in the production process of the bottle blank in the prior art is solved, so that the forming quality of the bottle blank is improved.

Description

Technical Field

[0001] The utility model relates to the field of container production, in particular to a core rod assembly. Background Art

[0002] In bottle production, the preform and the cap are processed separately. The preform is usually produced by a blank molding device, such as Figure 1 and Figure 2 As shown, the blank mold forming device includes a core rod assembly, a die module, a flange, a cavity and a bottom mold. Specifically, the inner shape of the bottle blank is formed by the core rod assembly in the blank mold forming device.

[0003] However, in the process of producing bottle blanks, if the bottle blanks are not cooled in time during the molding process, the product will shrink and deform, affecting the molding cycle. Similarly, in the process of bottle blank molding, if the gas in the bottle blanks is not discharged in time, the product will also be deformed and affect the molding cycle.

[0004] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this application is to provide a core rod assembly, which aims to solve the problem in the prior art that during the production process of bottle preforms, the bottle preforms are not cooled in time and the gas is not discharged in time, which affects the molding of the bottle preforms, thereby improving the molding quality of the bottle preforms.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: a core rod assembly, comprising:

[0007] A core rod body, the core rod body being used to shape the inner wall of the preform, the core rod body comprising a heat-conducting wall and a first exhaust groove, the heat-conducting wall being in contact with the preform, and the first exhaust groove being provided in the middle of the core rod;

[0008] A core rod seat, in which the core rod body is installed, so as to provide support for the core rod body through the core rod seat;

[0009] A core rod sleeve, the core rod sleeve being arranged between the core rod body and the core rod seat to fix the core rod seat and the core rod body;

[0010] A cooling tube is inserted into the core rod body to cool the core rod body.

[0011] Furthermore, the thickness of the heat-conducting wall is equal at all locations.

[0012] Furthermore, the core rod seat is provided with a second exhaust groove, the core rod sleeve is provided with a third exhaust groove, and the first exhaust groove, the second exhaust groove and the third exhaust groove are connected in sequence to discharge the gas in the bottle blank.

[0013] Furthermore, the core rod body is provided with a first mounting hole, the core rod body also includes a mounting pin, the core rod seat is provided with a second mounting hole, and the mounting pin penetrates the first mounting hole and the second mounting hole to mount the core rod body on the core rod seat.

[0014] Furthermore, the core rod body is further provided with a first positioning hole, the core rod body further includes a positioning pin, the core rod sleeve is provided with a second positioning hole, and the positioning pin penetrates into the first positioning hole and the second positioning hole to limit the rotation of the core rod sleeve.

[0015] Furthermore, the cooling pipe includes a cooling standard section and a cooling adjustment section, the cooling standard section is detachably connected to the cooling adjustment section, the end of the cooling adjustment section abuts against the inner cavity of the core rod body, and the end of the cooling standard section is connected to the water supply device.

[0016] Furthermore, the outer ring of the cooling standard section is provided with a limit piece to limit the forward and backward movement of the cooling tube relative to the core rod body.

[0017] Furthermore, the cooling adjustment section includes a cooling element and a water outlet, the cooling element is communicated with the cooling standard section, and the water outlet is arranged at an end of the cooling element away from the cooling standard section.

[0018] Furthermore, the cooling adjustment section further includes an anti-eccentricity member, and the anti-eccentricity member is arranged on the outer ring of the cooling member to limit the deflection of the cooling pipe.

[0019] Furthermore, the core rod body is divided into a core rod forming section and a core rod fixing section, and the core rod forming section and the core rod fixing section are threadedly connected.

[0020] Beneficial effects:

[0021] The present application provides a core rod assembly, in which the core rod body of the core rod assembly cooperates with the die module, the cavity and the bottom die to form a cavity, and the bottle blank is formed in the cavity. At the same time, the heat generated during the molding of the bottle blank is conducted away through the heat-conducting wall to prevent the temperature of the bottle blank from being too high and affecting the molding of the bottle blank. At the same time, the gas accumulated during the molding of the bottle blank is discharged in time through the first exhaust groove to prevent gas accumulation and affect the molding of the bottle blank. The core rod seat and the core rod sleeve are used to fix the core rod body to prevent the movement of the core rod body and affect the molding of the bottle blank. At the same time, it also ensures that the core rod body can be taken out of the core rod in time after the bottle blank is molded. The cooling pipe is used to conduct the heat of the core rod body in time to ensure that the core rod body can conduct the heat during the molding of the bottle blank in time and ensure the stable molding of the bottle blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a blank mold forming device;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0024] Figure 3 A schematic diagram of a core rod assembly in an embodiment of the present application;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross section along the BB direction;

[0026] Figure 5 This is a schematic diagram of the core rod body in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a core rod sleeve in an embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the core rod body in the embodiment of the present application being composed of a core rod forming section and a core rod fixing section connected together;

[0029] Figure 8 for Figure 7 Schematic diagram of the cross section along CC direction;

[0030] Figure 9 This is a schematic diagram of a cooling tube in an embodiment of the present application;

[0031] Figure 10 for Figure 9 Schematic diagram of the cross section along the DD direction;

[0032] Figures 11 to 17 Schematic diagram of other types of cooling tubes in the embodiments of the present application.

[0033] Description of reference numerals:

[0034] 1. Core rod body; 11. Heat-conducting wall; 12. First exhaust groove; 13. First mounting hole; 14. Mounting pin; 15. First positioning hole; 16. Positioning pin; 17. Core rod forming section; 18. Core rod fixing section; 2. Core rod seat; 21. Second exhaust groove; 22. Second mounting hole; 3. Core rod sleeve; 31. Third exhaust groove; 32. Second positioning hole; 4. Cooling pipe; 41. Cooling standard section; 411. Limiting member; 42. Cooling adjustment section; 421. Cooling member; 422. Water outlet; 423. Anti-eccentricity member; 10. Core rod assembly; 20. Mould module; 30. Cavity; 40. Bottom mould; 50. Flange. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions and advantages of this application clearer and more explicit, the following further describes this application in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain this application and are not intended to limit this application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] The utility model provides a core rod assembly, such as Figures 1 to 17As shown, the core rod assembly 10 is designed to solve the problem in the prior art that the preform is not cooled in time and the gas is not discharged in time during the production process of the preform, thereby improving the molding quality of the preform. The core rod assembly 10 cooperates with the mouth die module 20, the cavity 30, and the bottom die 40 in the preform molding device to form the preform in the cavity between these structures, and the flange 50 is used to fix the mouth die module 20. Specifically, the core rod assembly 10 includes a core rod body 1, a core rod seat 2, a core rod sleeve 3 and a cooling tube 4. The core rod body 1 is used to shape the inner wall of the preform, such as Figures 1 to 4 As shown, a cavity is formed between the front end of the core rod body 1 and the die block 20, cavity 30, and bottom mold 40. When a preform and its finish are to be formed, the preform molding apparatus is attached to and connected to an injection molding machine. The plastic particles in the injection molding machine are heated and dissolved in the barrel of the injection molding machine. The molten plastic particles then flow through the mold's hot runner into the cavity of the preform molding apparatus, where they cool and solidify to form the preform and its finish. At this point, the core rod body 1 contacts the inner wall of the preform, while the die block 20, cavity 30, and bottom mold 40 contact the outer shell of the preform. The core rod body 1 also serves to shape the inner shape of the preform. To cool the preform and expel gases from it during the molding process, the core rod body 1 includes a heat-conducting wall 11 and a first exhaust groove 12. The heat-conducting wall 11 is in contact with the inner wall of the preform, dissipating heat from the preform through the heat-conducting wall 11. At this point, the heat-conducting wall 11 is the outer shell of the core rod body 1. Since the inner wall of the preform is in close contact with the outer shell of the core rod body 1 during the preform molding process, heat must be dissipated from the preform in a timely manner through the outer shell of the core rod body 1. Furthermore, since the preform is formed into a long shape, if problems arise during the cooling process, such as uneven cooling of various parts of the preform, this can cause the preform to shrink and deform during the molding process, with different locations experiencing varying degrees of shrinkage, thus affecting the molding cycle. Therefore, to address the problem of shrinkage and deformation, the heat-conducting wall 11 is uniformly thick, i.e., the outer shell of the core rod body 1 that contacts the inner wall of the preform is uniformly thick. This ensures that the heat dissipation efficiency of the core rod body 1 at different locations of the preform is consistent, thereby ensuring a consistent cooling rate at all locations on the inner wall of the preform and a uniform temperature change at all locations, allowing the preform to shrink evenly during the molding process and ensuring uniform molding of the preform.

[0039] At the same time, when the bottle blank is being formed, the gas in the cavity is easy to accumulate. If the gas in the cavity accumulates too much, it will affect the forming of the bottle blank and may even damage the bottle blank. Therefore, a first exhaust groove 12 is further provided on the core rod body 1. The first exhaust groove 12 is provided in the middle of the core rod body 1. Figure 5 As shown, the first exhaust groove 12 is recessed into the inner cavity of the core rod body 1 , and the gas in the cavity is discharged in time through the first exhaust groove 12 to avoid gas accumulation in the cavity.

[0040] The core rod body 1 is mounted within the core rod seat 2, which provides support for the core rod body 1. This prevents the core rod body 1 from shifting during the preform molding process due to the forces exerted by the preform during molding and expansion, potentially affecting the preform's molding and causing the preform to fail. Furthermore, to secure the core rod body 1 and the core rod seat 2 and prevent them from moving relative to each other, the core rod assembly 10 also includes a core rod sleeve 3, which is disposed between the core rod body 1 and the core rod seat 2. The core rod sleeve 3 is used to secure the core rod seat 2 to the core rod body 1, thereby enabling the core rod seat 2 to better support the core rod body 1. A cooling tube 4 extends within the core rod body 1 and is used to cool the core rod body 1. As the preform is being molded, the outer shell of the core rod body 1 cools the preform, directing heat toward the core rod body 1. This increases the temperature of the core rod body 1, requiring timely cooling of the core rod body 1 to ensure that the core rod body 1 can absorb the heat generated during the preform molding process, ensuring a smooth molding process.

[0041] Since the core rod body 1 is installed in the core rod seat 2, and the core rod sleeve 3 is arranged between the core rod body 1 and the core rod seat 2, in order to be able to smoothly discharge the gas in the cavity, it is necessary to open exhaust grooves for exhaust on the core rod seat 2 and the core rod sleeve 3 at the same time. Therefore, in this application, the core rod seat 2 is provided with a second exhaust groove 21, and the core rod sleeve 3 is provided with a third exhaust groove 31. The first exhaust groove 12, the second exhaust groove 21 and the third exhaust groove 31 are connected in sequence to discharge the gas in the bottle blank, wherein the third exhaust groove 31 is circumferentially arranged on the outer circle, and the third exhaust groove 31 is centrally symmetrical with the central axis of the core rod sleeve.

[0042] like Figure 3 and Figure 4As shown, when the core rod body 1 and the core rod seat 2 are assembled, if the core rod body 1 is not pressed into the core rod seat 2, the core rod body 1 will loosen due to the force exerted by the expansion of the preform during the molding of the preform. In addition to affecting the molding of the preform, when the preform remains on the core rod body 1 and needs to be removed by a tool, the core rod body 1 will rotate and change position when loosening, making it difficult to remove the core rod body 1. Therefore, in order to solve the problem of the core rod body 1 being difficult to remove after the preform is molded, it is necessary to limit the rotation of the core rod during the molding of the preform. In this case, the core rod body 1 is provided with a first mounting hole 13, which is provided on the outer wall of the end of the core rod body 1 away from the bottom mold 40. In addition, the core rod body 1 also includes a mounting pin 14. Similarly, the core rod seat 2 is provided with a second mounting hole 22 at a position corresponding to the first mounting hole 13 on the core rod body 1. Therefore, it is necessary to press the core rod body 1 onto the core rod seat 2 to prevent the core rod body 1 from loosening. First, place the core rod body 1 into the core rod seat 2, align the first mounting hole 13 and the second mounting hole 22, and then insert the mounting pin 14 into the first mounting hole 13 and the second mounting hole 22. Lock the first mounting hole 13 and the second mounting hole 22 by the mounting pin 14, so as to install the core rod body 1 on the core rod seat 2 and press the core rod body 1 to the core rod seat 2.

[0043] The core rod sleeve 3 is used to cooperate with the core rod body 1 and the core rod seat 2 to prevent the core rod body 1 and the core rod seat 2 from rotating with each other. When the core rod sleeve 3 and the core rod body 1 are not tightly matched, the core rod sleeve 3 will rotate, and then the core rod body 1 and the core rod seat 2 will move relative to each other, affecting the molding of the bottle blank. Therefore, in order to solve the problem of the core rod sleeve 3 rotating during the process of bottle blank molding, the core rod body 1 is also provided with a first positioning hole 15, and the first positioning hole 15 is specifically provided on the outer wall of the core rod body 1, and the first positioning hole 15 faces the bottom mold 40. At the same time, the core rod body 1 also includes a positioning pin 16, and the core rod sleeve 3 is provided with a second positioning hole 32, and the second positioning hole 32 is specifically provided at the position where the core rod sleeve 3 abuts the first positioning hole 15. After the core rod sleeve 3 is installed on the core rod body 1, the first positioning hole 15 and the second positioning hole 32 are aligned, and then the positioning pin 16 is inserted into the first positioning hole 15 and the second positioning hole 32 to lock the first positioning hole 15 and the second positioning hole 32, thereby limiting the rotation of the core rod sleeve 3, thereby avoiding relative rotation between the core rod body 1 and the core rod seat 2, and ensuring that the bottle blank molding process can be carried out stably.

[0044] like Figure 7 and Figure 8As shown, since the core rod body 1 is relatively long and only the front end of the core rod body 1 is used to cooperate with the die block 20, the cavity 30, and the bottom die 40 to form a cavity for forming the preform, only this section of the core rod body 1 needs to be adjusted according to the shape of the preform being formed. The other section of the core rod body 1 is only used to cooperate and fix with the core rod seat 2 and the core rod sleeve 3 and generally does not need to be adjusted according to the shape of the preform. Therefore, in other embodiments, the core rod body 1 can be divided into two sections, one section being the core rod forming section 17 and the other section being the core rod fixing section 18. The core rod forming section 17 and the core rod fixing section 18 are connected by threads. The core rod forming section 17 forms a cavity for forming the preform between the die block 20, the cavity 30, and the bottom die 40. Therefore, the core rod forming section 17 can be adjusted according to the desired shape of the preform. The core rod fixing section 18 cooperates and fixes with the core rod seat 2 and the core rod sleeve 3 to prevent relative rotation between the core rod body 1 and the core rod seat 2, which could affect the forming of the preform.

[0045] Similarly, the cooling tube 4 is completely inserted into the core rod body 1. Since the core rod body 1 is long and only the front end of the core rod body 1 directly participates in the forming of the bottle blank, the cooling tube 4 can also be designed as a split type. Specifically, in this application, the cooling tube 4 is divided into a cooling standard section 41 and a cooling adjustment section 42. Figure 9 and Figure 10 As shown, the standard cooling section 41 is threadedly connected to the cooling adjustment section 42, and the end of the cooling adjustment section 42 abuts the end of the inner cavity of the core rod body 1. The end of the standard cooling section 41 is connected to a water supply device, through which cooling water is injected into the cooling tube 4. Therefore, before assembling the preform molding device, it is only necessary to adjust the cooling adjustment section 42 according to the front end of the core rod body 1. The cooling adjustment section 42 is then threadedly connected to the standard cooling section 41 to form a complete cooling tube 4, without the need to adjust the entire cooling tube 4. This saves processing time and cost and makes standardization easier.

[0046] When the cooling tube 4 is inserted into and installed in the core rod body 1, if the movement of the cooling tube 4 is not restricted, the cooling tube 4 will move back and forth in the inner cavity of the core rod body 1. At this time, the cooling tube 4 will collide with the inner cavity of the core rod body 1 during the movement. In addition to causing the end of the cooling tube 4 to deform, it will also cause damage to the inner cavity of the core rod body 1, affecting the flow of cooling water in the inner cavity of the core rod body 1. Therefore, in order to prevent the cooling tube 4 from moving in the core rod body 1, in this application, the outer ring of the core rod standard section is provided with a limiter 411, which limits the movement of the cooling tube 4 and prevents the cooling tube 4 from moving back and forth in the core rod body 1, thereby protecting the cooling tube 4 and the core rod body 1 from being damaged. The limiter 411 has two structures, such as Figure 11 and Figure 12As shown, the limiting member 411 comprises a cylindrical pin limiter and a triangular step limiter. The cylindrical pin is circumferentially arranged on the outer ring of the cooling standard section 41. In this embodiment, two cylindrical pins are provided, symmetrically about the central axis of the cooling standard section 41. The triangular step limiter comprises three protrusions extending outward from the outer ring of the cooling standard section 41, thereby giving the triangular step limiter a triangular cross-section. Therefore, in this application, the cooling tube 4 can be clamped into the inner cavity of the core rod body 1 by using the cylindrical pin or the protrusions of the triangular step limiter, preventing the cooling tube 4 from moving back and forth within the core rod body 1. Only when the cooling tube 4 needs to be withdrawn, a certain amount of force can be applied to withdraw the cooling tube 4 from the core rod body 1.

[0047] During the forming process, the preform needs to be cooled in time. Since the forming process of the preform is located in the cavity between the core rod body 1 and the die module 20, the cavity 30 and the bottom die 40, it is necessary to add a cooling structure in the inner cavity of the core rod body 1 corresponding to the cavity, so as to cool the core rod body 1 in time, so that the core rod body 1 can dissipate heat from the preform in time. Located in the inner cavity of the core rod body 1 here is the cooling adjustment section 42 in the cooling pipe 4. Water for cooling is transported to this section of the cavity through the cooling adjustment section 42, and the core rod body 1 is cooled by the water flow. In order to guide the water flow in the inner cavity of this section of the core rod body 1, the cooling adjustment section 42 includes a cooling part 421, and the cooling part 421 is connected to the cooling standard section 41. The water supply device supplies water to the cooling standard section 41, and then the water flows to the cooling part 421, flows out of the cooling pipe 4 through the outlet of the cooling part 421 and flows to the inner cavity of the core rod body 1. In order to maintain a stable flow of water in the inner cavity of the core rod body 1, as Figure 13 As shown, the cooling member 421 is arranged in a straight-through manner. The cooling member 421 is a straight-through pipe. In other embodiments, as shown in FIG. Figure 14 As shown, in order to guide the flow of water in the inner cavity of the core rod body 1, the cooling member 421 can also adopt a spiral structure, that is, a thread is added to the outer ring of the cooling member 421 to guide the flow of water through the thread, or the cooling member 421 can also adopt a triangular distributed structure, such as Figure 15 As shown, a plurality of triangles are provided on the outer ring of the cooling member 421 to guide the flow of water, thereby further enhancing the cooling effect of the cooling pipe 4 by guiding the flow of water.

[0048] Because it is necessary to make the water in the cooling adjustment section 42 flow to the inner cavity of the core rod body 1 and cool the core rod body 1 by the water flow, the cooling adjustment section 42 also includes a water outlet 422, which is arranged at the end of the cooling member 421 away from the cooling standard section 41. The water in the cooling adjustment section 42 flows to the inner cavity of the core rod body 1 through the water outlet 422. Figure 15As shown, in this embodiment, the water outlet 422 is set to a triangle. The use of a triangle in the water outlet 422 can increase the water output of the water outlet 422, thereby increasing the water flow speed in the inner cavity of the core rod body 1, which is more conducive to heat dissipation of the core rod body 1. In other embodiments, the water outlet 422 can also be other shapes, such as Figure 12 As shown, the water outlet 422 is straight, and water is discharged through the gap between the cooling tube 4 and the inner cavity of the core rod body 1, so that the water flow in the inner cavity of the core rod body 1 is more stable and the temperature is better controlled. Alternatively, the water outlet 422 adopts a semicircular or other specific shape, such as Figure 16 and Figure 17 As shown, water outlets 422 of different shapes are used according to different needs.

[0049] Furthermore, when the cooling tube 4 is inserted into the core rod, in addition to preventing the cooling tube 4 from moving back and forth within the core rod, it is also necessary to prevent the cooling tube 4 from deflecting, which could cause uneven cooling and affect the heat dissipation from the core rod body 1 to the preform during molding, thereby affecting the molding of the preform. Therefore, to prevent the cooling tube 4 from deflecting within the core rod body 1, the cooling adjustment section 42 also includes an anti-eccentricity member 423. The anti-eccentricity member 423 is disposed on the outer ring of the cooling member 421 to limit the deflection of the cooling tube 4. Specifically, in this embodiment, the anti-eccentricity member 423 is a step on the outer ring of the cooling member 421. By adding a plurality of steps to the outer ring of the cooling member 421, the cooling adjustment section 42 is prevented from swaying within the core rod body 1, thereby preventing the cooling tube 4 from deflecting. In this embodiment, three steps are provided, surrounding the outer ring of the cooling member 421. The steps are rectangular and symmetrical about the central axis of the cooling member 421. In other embodiments, the number of steps may be different, and the shape of the steps may also be circular or triangular. Different numbers and shapes of steps can be provided according to specific needs.

[0050] Therefore, the core rod assembly 10 in the present application is used to cool the bottle blank during molding to ensure that the bottle blank molding is stable. First, the core rod body 1 is installed in the core rod seat 2, and the first mounting hole 13 and the second mounting hole 22 are aligned. The mounting pin 14 is inserted into the first mounting hole 13 and the second mounting hole 22 to press the core rod body 1 onto the core rod seat 2. Then the core rod sleeve 3 is installed. At this time, it is necessary to align the first positioning hole 15 and the second positioning hole 32, and then insert the positioning pin 16 into the first positioning hole 15 and the second positioning hole 32, and install the core rod sleeve 3 between the core rod body 1 and the core rod seat 2 to prevent the core rod body 1 from moving relative to the core rod seat 2. At the same time, align the first exhaust groove 12, the second exhaust groove 21 and the third exhaust groove 31 during this process to ensure that the gas can be discharged smoothly during the molding of the bottle blank. After the installation is completed, the cooling tube 4 is inserted into the inner cavity of the core rod body 1 so that the water outlet 422 abuts against the end of the inner cavity of the core rod body 1. At the same time, the limiting member 411 is used to prevent the cooling tube 4 from moving back and forth relative to the core rod body 1, and the anti-eccentricity member 423 is used to prevent the cooling tube 4 from deflecting. After the cooling tube 4 is installed, water is supplied to the cooling tube 4 through the water supply device, and then the cooling water flows into the inner cavity of the core rod body 1 through the water outlet 422 to dissipate heat from the bottle blank.

[0051] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A core rod assembly, characterized in that: include: A core rod body, the core rod body being used to shape the inner wall of the preform, the core rod body comprising a heat-conducting wall and a first exhaust groove, the heat-conducting wall being in contact with the preform, and the first exhaust groove being provided in the middle of the core rod; A core rod seat, in which the core rod body is installed, so as to provide support for the core rod body through the core rod seat; A core rod sleeve, the core rod sleeve being arranged between the core rod body and the core rod seat to fix the core rod seat and the core rod body; A cooling tube is inserted into the core rod body to cool the core rod body.

2. The core rod assembly according to claim 1, characterized in that The thickness of the heat-conducting wall is equal at all locations.

3. The core rod assembly according to claim 2, characterized in that The core rod seat is provided with a second exhaust groove, the core rod sleeve is provided with a third exhaust groove, and the first exhaust groove, the second exhaust groove and the third exhaust groove are connected in sequence to discharge the gas in the bottle blank.

4. The core rod assembly according to claim 1, characterized in that The core rod body is provided with a first mounting hole, and the core rod body also includes a mounting pin. The core rod seat is provided with a second mounting hole. The mounting pin penetrates the first mounting hole and the second mounting hole to mount the core rod body on the core rod seat.

5. The core rod assembly according to claim 4, characterized in that The core rod body is further provided with a first positioning hole, the core rod body also includes a positioning pin, and the core rod sleeve is provided with a second positioning hole. The positioning pin penetrates into the first positioning hole and the second positioning hole to limit the rotation of the core rod sleeve.

6. The core rod assembly according to claim 1, characterized in that The cooling pipe includes a cooling standard section and a cooling adjustment section. The cooling standard section is detachably connected to the cooling adjustment section. The end of the cooling adjustment section abuts against the inner cavity of the core rod body. The end of the cooling standard section is connected to a water supply device.

7. The core rod assembly according to claim 6, characterized in that The outer ring of the cooling standard section is provided with a limiting piece to limit the forward and backward movement of the cooling tube relative to the core rod body.

8. The core rod assembly according to claim 6, characterized in that The cooling adjustment section includes a cooling element and a water outlet. The cooling element is communicated with the cooling standard section. The water outlet is arranged at an end of the cooling element away from the cooling standard section.

9. The core rod assembly according to claim 8, characterized in that The cooling adjustment section further includes an anti-eccentricity member, which is arranged on the outer ring of the cooling member to limit the deflection of the cooling pipe.

10. The core rod assembly according to claim 9, characterized in that The core rod body is divided into a core rod forming section and a core rod fixing section, and the core rod forming section and the core rod fixing section are threadedly connected.

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