Core rod assembly

Abstract

The invention 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 invention 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 preform 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 blank is not discharged in time, it will also cause product deformation and affect the molding cycle.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[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 in the production process of bottle blanks, the bottle blanks are not cooled in time and the gas is not discharged in time, which affects the molding of the bottle blanks, thereby improving the molding quality of the bottle blanks.

[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 is used to shape the inner wall of the bottle blank, the core rod body comprises a heat-conducting wall and a first exhaust groove, the heat-conducting wall is in contact with the bottle blank, and the first exhaust groove is arranged 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 is 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 exhaust 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 into 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 provided with a first positioning hole, the core rod body also 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 a water supply device.

[0016] Furthermore, a limiter is provided on the outer ring of the cooling standard section 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 also 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 a core rod body cooperates with a die module, a cavity and a bottom die to form a cavity, in which a preform is formed, and heat generated during the forming of the preform is conducted away through a heat-conducting wall, to avoid excessive temperature of the preform affecting the forming of the preform, and gas accumulated during the forming of the preform is discharged in time through a first exhaust groove, to avoid gas accumulation affecting the forming of the preform, a core rod seat and a core rod sleeve are used to fix the core rod body, to avoid movement of the core rod body affecting the forming of the preform, and to ensure that the core rod body can be taken out of the core rod in time after the preform is formed, and a cooling pipe is used to conduct heat away from the core rod body in time, to ensure that the core rod body can conduct heat away from the forming of the preform in time, and to ensure stable forming of the preform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1is 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 A schematic diagram of a 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 a core rod body in an embodiment of the present application, which is 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] Fig. 9 This is a schematic diagram of a cooling tube in an embodiment of the present application;

[0031] Fig.10 for Fig. 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-eccentric member; 10. Core rod assembly; 20. Mouth die module; 30. Cavity; 40. Bottom die; 50. Flange. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 technical features indicated. Thus, 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The present invention provides a core rod assembly, such as Figures 1 to 17 As shown, the core rod assembly 10 is intended 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 mold module 20, the cavity 30, and the bottom mold 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 mold 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 4As shown, a cavity is formed between the front end of the core rod body 1 and the mouth mold module 20, the cavity 30 and the bottom mold 40. When it is necessary to form a preform and a bottle mouth on the preform, the preform mold forming device is hung on the injection molding machine and connected to the injection molding machine. The plastic particles in the injection molding machine are heated and dissolved in the barrel of the injection molding machine, and then the plastic particle melt flows into the cavity of the preform mold forming device through the hot runner of the mold to cool and solidify to form the preform and the bottle mouth of the preform. At this time, the core rod body 1 is in contact with the inner wall of the preform, while the mouth mold module 20, the cavity 30 and the bottom mold 40 are in contact with the outer shell of the preform. At this time, the core rod body 1 is also used to form the inner shape of the preform. In order to cool the preform in time and discharge the gas in the preform during the process of forming the preform, 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, and the heat of the preform is dissipated through the heat-conducting wall 11. At this time, the heat-conducting wall 11 is the outer shell of the core rod body 1. Since the inner wall of the bottle blank is closely attached to the outer shell of the core rod body 1 during the process of bottle blank molding, it is necessary to dissipate heat from the bottle blank in time through the outer shell of the core rod body 1. In addition, since the shape of the bottle blank is relatively long, if there is a problem in the cooling process of the bottle blank, such as the various parts of the bottle blank are not evenly cooled, this will cause the bottle blank to shrink and deform during the molding process, and different positions will shrink to different degrees, which will affect the molding cycle. Therefore, in order to solve the problem of bottle blank shrinkage and deformation, the thickness of the heat-conducting wall 11 is equal at this time, that is, the thickness of the outer shell of the core rod body 1 in contact with the inner wall of the bottle blank is equal, ensuring that the heat dissipation efficiency of the core rod body 1 for different positions of the bottle blank is consistent, thereby ensuring that the cooling speed of each part of the inner wall of the bottle blank is consistent, ensuring that the temperature of each part of the bottle blank changes evenly, so that the bottle blank can shrink evenly during the molding process, and ensuring that the bottle blank is uniformly molded.

[0039] At the same time, during the process of forming the bottle blank, 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 also provided on the core rod body 1. The first exhaust groove 12 is arranged in the middle of the core rod body 1. Figure 5 As shown, the first exhaust groove 12 is recessed toward 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 installed in the core rod seat 2, and the core rod seat 2 provides support for the core rod body 1 to prevent the core rod body 1 from moving due to the force when the bottle blank is formed and expanded during the forming process, thereby affecting the forming of the bottle blank and causing the forming of the bottle blank to fail. In addition, in order to fix the core rod body 1 and the core rod seat 2 and prevent the core rod body 1 and the core rod seat 2 from moving relative to each other, the core rod assembly 10 also includes a core rod sleeve 3, which is arranged between the core rod body 1 and the core rod seat 2. The core rod sleeve 3 is used to fix the core rod seat 2 and the core rod body 1, so that the core rod seat 2 can better support the core rod body 1. The cooling pipe 4 penetrates into the core rod body 1 and is used to cool the core rod body 1. When the bottle blank is formed, the outer shell of the core rod body 1 cools the bottle blank, and the heat is directed to the core rod body 1. The temperature of the core rod body 1 increases. At this time, the core rod body 1 needs to be cooled in time to ensure that the core rod body 1 can absorb the heat generated during the forming of the bottle blank in time to ensure the smooth progress of the forming process of the bottle blank.

[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 the present 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 in 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 when the bottle blank is formed due to the expansion of the bottle blank volume. In addition to affecting the forming of the bottle blank, when the bottle blank is left on the core rod body 1 and needs to be taken out by a tool, the core rod body 1 rotates when it is loose and changes its position, making it difficult to take out the core rod body 1. Therefore, in order to solve the problem that the core rod body 1 is difficult to take out after the bottle blank is formed, it is necessary to limit the rotation of the core rod during the forming of the bottle blank. At this time, the core rod body 1 is provided with a first mounting hole 13, and the first mounting hole 13 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, put 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. The first mounting hole 13 and the second mounting hole 22 are locked by the mounting pin 14, so that the core rod body 1 is installed on the core rod seat 2 and the core rod body 1 is pressed 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 relative to 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, thereby causing relative movement between the core rod body 1 and the core rod seat 2, affecting the molding of the bottle blank. Therefore, in order to solve the problem that the core rod sleeve 3 rotates 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 process of bottle blank molding can be carried out stably.

[0044] like Figure 7 and Figure 8As shown, since the core rod body 1 is long, and since only the front end of the core rod body 1 is used to cooperate with the die module 20, the cavity 30 and the bottom die 40 to form a cavity for bottle blank molding, only this section of the core rod body 1 needs to be adjusted according to the shape of the bottle blank molded, and 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 bottle blank. Therefore, in other embodiments, the core rod body 1 can be divided into two sections, one section is the core rod molding section 17, and the other section is the core rod fixing section 18. The core rod molding section 17 and the core rod fixing section 18 are connected by threads. The core rod molding section 17 and the die module 20, the cavity 30 and the bottom die 40 form a cavity for bottle blank molding. Therefore, the core rod molding section 17 can be adjusted according to the shape required for bottle blank molding, and the core rod fixing section 18 is fixed with the core rod seat 2 and the core rod sleeve 3 to prevent the core rod body 1 and the core rod seat 2 from rotating relative to each other and affecting the molding of the bottle blank.

[0045] Similarly, the cooling tube 4 is completely inserted into the core rod body 1. Since the core rod body 1 is relatively long and only the front end of the core rod body 1 directly participates in the forming of the preform, the cooling tube 4 can also be designed in a split type. Specifically, in the present application, the cooling tube 4 is divided into a cooling section 41 and a cooling adjustment section 42. Fig. 9 and Fig.10 As shown, the cooling standard section 41 is threadedly connected with the cooling adjustment section 42, and the end of the cooling adjustment section 42 abuts against the end of the inner cavity of the core rod body 1. The end of the cooling standard section 41 is connected to the water supply device, and cooling water is injected into the cooling tube 4 through the water supply device. 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, and then the cooling adjustment section 42 is threadedly connected with the cooling standard section 41 to form a complete cooling tube 4, without adjusting the entire cooling tube 4, saving processing time and cost, and making it easier to achieve standardization.

[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 hit 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 the present application, a limiter 411 is provided on the outer ring of the core rod standard section. The limiter 411 limits the movement of the cooling tube 4 to prevent 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 Fig.11 and Fig.12As shown, the limiter 411 has 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 arranged, and the cylindrical pins are symmetrical with the central axis of the cooling standard section 41; the triangular step limiter is that three protrusions extend outward from the outer ring of the cooling standard section 41, so that the cross section of the triangular step limiter is triangular. Therefore, in this application, the cooling tube 4 can be clamped into the inner cavity of the core rod body 1 through the cylindrical pin or the protrusion of the triangular step limiter to prevent the cooling tube 4 from moving back and forth in the core rod body 1. Only when the cooling tube 4 needs to be pulled out, a certain force can be applied to pull the cooling tube 4 out of the core rod body 1.

[0047] During the forming process of the preform, it is necessary to cool it 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 tube 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 tube 4 through the outlet of the cooling part 421 and flows to the inner cavity of the core rod body 1. In order to keep the water flow in the inner cavity of the core rod body 1 flowing steadily, such as Fig.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. Fig.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 Fig.15 As shown, a plurality of triangles are provided on the outer ring of the cooling member 421 to guide the flow direction of the water flow, thereby further enhancing the cooling effect of the cooling pipe 4.

[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 water flow, the cooling adjustment section 42 also includes a water outlet 422, which is arranged at one end of the cooling member 421 away from the cooling standard section 41, and the water in the cooling adjustment section 42 flows to the inner cavity of the core rod body 1 through the water outlet 422. Fig.15As shown, in this embodiment, the water outlet 422 is set to be a triangle. The water outlet 422 is a triangle, which 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 Fig.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 is semicircular or in other specific shapes, such as Fig.16 and Fig.17 As shown, water outlets 422 of different shapes are used according to different requirements.

[0049] In addition, when the cooling tube 4 is inserted into the core rod, in addition to preventing the cooling tube 4 from moving back and forth in the core rod, it is also necessary to prevent the cooling tube 4 from deflecting to cause uneven cooling, which affects the heat dissipation of the core rod body 1 to the bottle blank during the bottle blank molding, thereby affecting the molding of the bottle blank. Therefore, in order to prevent the cooling tube 4 from deflecting in the core rod body 1, the cooling adjustment section 42 also includes an anti-eccentricity member 423, which is arranged 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 number of steps on the outer ring of the cooling member 421, the cooling adjustment section 42 is prevented from shaking in the core rod body 1, thereby preventing the cooling tube 4 from deflecting. In this embodiment, three steps are arranged, surrounding the outer ring of the cooling member 421. The steps are rectangular and symmetrical with the central axis of the cooling member 421. In other embodiments, they can also be other numbers. At the same time, the shape of the steps can also be circular or triangular. Different numbers and shapes of steps can be set 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 on the core rod seat 2, and 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 the positioning pin 16 is inserted into the first positioning hole 15 and the second positioning hole 32, and the core rod sleeve 3 is installed 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, the first exhaust groove 12, the second exhaust groove 21 and the third exhaust groove 31 are aligned in 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 is abutted 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 forward and backward 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, improvements or changes can be made 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 is used to shape the inner wall of the bottle blank, the core rod body comprises a heat-conducting wall and a first exhaust groove, the heat-conducting wall is in contact with the bottle blank, and the first exhaust groove is arranged 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 is 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 exhaust 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 also provided with a first positioning hole, the core rod body also 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.

6. The core rod assembly according to claim 1, characterized in that: The cooling pipe comprises 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 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 limiter 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 comprises a cooling element and a water outlet. The cooling element is communicated with the cooling standard section. The water outlet is arranged at one 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 also 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 any one of claims 1 to 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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