A core and a hot core and a plastic mold formed thereby

Abstract

The utility model provides a kind of nozzle and the hot nozzle and plastic mould formed by it, wherein, nozzle includes nozzle body and spring heater, the inside of nozzle body is provided with hollow glue outlet channel, the end of glue outlet channel is glue outlet;The nozzle body includes the connecting portion and heating support portion connected in turn, the outer diameter of the heating support portion is greater than the outer diameter of the connecting portion, the glue outlet is located in the side of the heating support portion away from the connecting portion;The spring heater is around in the outside of the heating support portion.This application can ensure that nozzle is heated rapidly, and maintain higher temperature, when the temperature of nozzle is slightly higher than the temperature of glue, it can supplement the heat flow lost in filling process of glue, improve its fluidity, reduce the thickness of solidification layer, realize rapid color change.

Description

Technical Field

[0001] This utility model relates to the technical field of nozzle structure design, and in particular to a nozzle, a hot nozzle formed therefrom, and a plastic mold. Background Technology

[0002] Existing hot nozzle structures such as Figure 1 and Figure 2 As shown, the main components include a sleeve 1, a spring heater 3, a hot nozzle body 2, a retaining ring 4, an existing nozzle core 11, and a sealing ring 12. The existing nozzle core 11 is made of beryllium copper, which has good thermal conductivity. The sealing ring 12 is snapped into the nozzle core, and the nozzle core and the hot nozzle body 2 are fixed together through the threaded connection in the sealing ring 12. The retaining ring 4 is snapped into the sealing ring and is used to snap the sleeve 1 onto the outside of the hot nozzle body 3.

[0003] In the above structure, the spring heating tube 3 transfers heat to the hot nozzle body 2, which then transfers the heat to the existing nozzle core 11. This means the heat of the nozzle core is mainly transferred through the hot nozzle body, resulting in poor heat transfer efficiency. During injection molding, the rubber compound needs to be in a molten state, requiring a high temperature. If the temperature at the nozzle core is low, the heat from the rubber compound will be transferred to the nozzle core, causing the rubber compound temperature to drop, reducing its fluidity and hindering filling. Especially during color changes, the lower rubber compound temperature leads to a thicker solidified layer, resulting in mixed colors in the product and hindering color change production. Utility Model Content

[0004] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide a nozzle core that can ensure rapid heating and maintain a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the rubber compound, it can replenish the heat flow lost by the rubber compound during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0005] A nozzle core includes a nozzle core body and a spring heater.

[0006] The nozzle body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet; the nozzle body includes a connecting part and a heating support part connected in sequence, the outer diameter of the heating support part is larger than the outer diameter of the connecting part, and the glue outlet is located on the side of the heating support part away from the connecting part.

[0007] The spring heater surrounds the outside of the heating support.

[0008] In a preferred embodiment of this invention, the outer side of the connecting portion is provided with an external thread for connecting the hot nozzle body.

[0009] In this application, the hot nozzle body has a hollow flow channel inside, and the end of the flow channel has an internal thread. The outer side of the connecting part has an external thread that matches the internal thread at the end of the flow channel. The nozzle core and the hot nozzle body are fixedly connected together through the external thread in the connecting part, and the flow channel and the dispensing channel are connected. The fixed connection between the nozzle core and the hot nozzle body is achieved through a threaded connection, which is convenient to operate and has a simple structure.

[0010] In a preferred embodiment of this utility model, a glue outlet is provided on the side of the heating support portion away from the connecting portion. The glue outlet has a frustum-shaped structure, and the cross-sectional area of ​​the glue outlet on the side away from the heating support portion is smaller than the cross-sectional area of ​​the glue outlet on the side close to the heating support portion. The glue outlet is provided on the side of the glue outlet on the side away from the heating support portion.

[0011] In this application, the dispensing section is located at the end of the dispensing channel. At the end of the dispensing channel, the nozzle body retracts inward to form a frustum-shaped dispensing section, which facilitates the accumulation of adhesive material within the dispensing channel before output. The frustum-shaped dispensing section ensures that the adhesive material accumulates before output, thereby increasing the dispensing flow rate.

[0012] In a preferred embodiment of this invention, a sealing section is provided between the dispensing section and the heating support section, and the sealing section has a cylindrical structure; and the cross-sectional area of ​​the sealing section is larger than the cross-sectional area of ​​the dispensing section.

[0013] When the hot nozzle, formed by assembling the nozzle core and the hot nozzle body, is installed in the injection mold, the injection mold has a groove that matches the frustum-shaped dispensing section. A hopper is formed between this groove and the dispensing section; the adhesive material in the dispensing channel first flows into the hopper through the dispensing port, and then enters the injection cavity from inside the hopper. To prevent the adhesive material inside the hopper from overflowing from the top of the nozzle core, a sealing section is installed between the dispensing section and the heating support section. The sealing section is used to seal the adhesive material inside the hopper, ensuring that it enters the injection cavity instead of overflowing from the top of the nozzle core.

[0014] In a preferred embodiment of this invention, the size of the dispensing portion is 1.99mm-2.01mm in the direction parallel to the dispensing channel.

[0015] During the process of the rubber material entering the injection molding cavity from the hopper, pressure needs to be applied to it. In order to prevent the rubber material in the hopper from being ejected from the outlet under this pressure, this application requires that the outlet has a certain height to resist the impact force of the rubber material in the hopper. When the height of the outlet is set to 1.99mm-2.01mm, this application can not only prevent the rubber material in the hopper from overflowing, but also prevent the sealing part from being too high, which would cause the heat in the heating support part to be unable to be transferred to the outlet position in time, resulting in the outlet temperature being too low.

[0016] In a preferred embodiment of this invention, a groove is provided between the sealing part and the heating support part; the outer diameter of the heating support part is larger than the outer diameter of the sealing part.

[0017] The purpose of the slot is to secure the tube sleeve to the outside of the hot nozzle body, thus protecting the hot nozzle body. At the same time, both the heating support and the hot nozzle body need to be wound with spring heaters. Therefore, it is necessary to ensure that the outer diameter of the heating support is equal to the outer diameter of the hot nozzle body, and the outer diameter of the sealing part is smaller than the outer diameter of the hot nozzle body, so as to match the top of the hopper. This ensures the hopper is sealed while improving the temperature transfer efficiency at the dispensing port.

[0018] The second objective of this application is to provide a hot nozzle, including a hot nozzle body and a nozzle core as described above; the connecting portion in the nozzle core is connected to the hot nozzle body.

[0019] In this application, the spring heating tube is directly wound around the hot nozzle body and the sealing ring nozzle core. The spring heating tube can directly heat the nozzle core, improving the heating effect of the nozzle core. Compared with the hot nozzle structure in the prior art, this application provides a heating support part for winding the spring heater in the nozzle core body, so that the spring heater is directly wrapped around the nozzle core body to heat the nozzle core. Since the spring heater is directly sleeved outside the glue outlet channel of the nozzle core body, it can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the glue, it can make up for the heat flow lost by the glue during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0020] In a preferred embodiment of this invention, the outer diameter of the heating support is equal to the outer diameter of the hot nozzle body, the connecting part is connected to the inner side of the end of the hot nozzle body, and the spring heater surrounds the outer side of the heating support and the hot nozzle body.

[0021] The outer diameter of the heating support is larger than the outer diameter of the connecting part and equal to the outer diameter of the hot nozzle body, ensuring that the spring heater can simultaneously surround the outer side of the heating support in the hot nozzle body and the nozzle core, for heating the hot nozzle body and the nozzle core at the same time.

[0022] In a preferred embodiment of this invention, the hot nozzle further includes a retaining ring and a sleeve. The sleeve is fitted over the outside of the hot nozzle body, and the sleeve and the nozzle core are engaged by the retaining ring. The retaining groove serves to secure the sleeve to the outside of the hot nozzle body, thus protecting the hot nozzle body.

[0023] The third objective of this application is to provide a plastic mold, including a hot nozzle as described above.

[0024] This application can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than that of the rubber compound, it can replenish the heat flow lost by the rubber compound during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model provides a nozzle core, including a nozzle core body and a spring heater. The nozzle core body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet. The nozzle core body includes a connecting part and a heating support part connected in sequence. The outer diameter of the heating support part is larger than the outer diameter of the connecting part, and the glue outlet is located on the side of the heating support part away from the connecting part. The spring heater surrounds the outside of the heating support part. This application provides a heating support part for winding the spring heater in the nozzle core body, so that the spring heater directly surrounds the nozzle core body to heat the nozzle core. Since the spring heater is directly sleeved outside the glue dispensing channel of the nozzle core body, it can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the glue, it can replenish the heat flow lost by the glue during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0027] This application also provides a hot nozzle, including a hot nozzle body and a nozzle core as described above; the connecting part in the nozzle core is connected to the hot nozzle body; a spring heater surrounds the heating support and the outside of the hot nozzle body, for simultaneously heating the nozzle core and the hot nozzle body, ensuring that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the rubber compound, it can replenish the heat flow lost by the rubber compound during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0028] This application also provides a plastic mold, including a hot nozzle as described above; since the spring heater is directly sleeved outside the dispensing channel of the nozzle core body, it can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the rubber material, it can replenish the heat flow lost by the rubber material during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change. Attached Figure Description

[0029] Figure 1 This is a schematic diagram showing the structural breakdown of a heat nozzle in the prior art;

[0030] Figure 2 This is a cross-sectional view of a hot runner in the prior art;

[0031] Figure 3 This is a schematic diagram of the overall structure of the nozzle core body in this application;

[0032] Figure 4 This is a cross-sectional view of the nozzle body in this application;

[0033] Figure 5 This is a schematic diagram of the assembly of the nozzle core body and the spring heater in this application;

[0034] Figure 6 This is a structural breakdown diagram of the hot runner in this application;

[0035] Figure 7 This is a schematic diagram of the hot nozzle body and nozzle core after assembly in this application;

[0036] Figure 8 This is a cross-sectional view of the hot nozzle body and nozzle core after assembly in this application;

[0037] Figure 9 This is a complete schematic diagram of the hot nozzle after assembly in this application;

[0038] Figure 10 This is a schematic diagram of the hot nozzle of this application installed in a plastic mold.

[0039] Figure label:

[0040] 1. Tube sleeve; 2. Hot nozzle body; 3. Spring heater; 4. Snap ring; 51. Connecting part; 52. Heating support part; 53. Snap groove; 54. Dispensing part; 55. Sealing part; 8. Material hopper; 11. Existing nozzle core; 12. Sealing ring. Detailed Implementation

[0041] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0042] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] Example 1

[0045] like Figures 3-10 As shown, this application provides a nozzle core, including a nozzle core body and a spring heater 3.

[0046] The nozzle body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet; the nozzle body includes a connecting part 51 and a heating support part 52 connected in sequence, the outer diameter of the heating support part 52 is larger than the outer diameter of the connecting part 51, and the glue outlet is located on the side of the heating support part 52 away from the connecting part 51.

[0047] The spring heater 3 surrounds the outside of the heating support 52.

[0048] In this application, the spring heater 3 refers to a structure in which the heating wire is wound in a spring-like manner to ensure that the heating wire can be wrapped around the outside of the heating support 52.

[0049] In this application, the dispensing channel is used to allow the adhesive to flow out. In actual operation, it needs to be used in conjunction with components such as valve needles to allow the adhesive to be dispensed or sealed.

[0050] In this application, the nozzle core needs to be installed inside the hot nozzle body 2 during actual use. The hot nozzle body 2 is provided with a glue flow channel. The glue flows from the glue flow channel to the glue outlet channel, and then flows out from the glue outlet for injection molding and other operations.

[0051] This utility model provides a nozzle core, including a nozzle core body and a spring heater 3. The nozzle core body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet. The nozzle core body includes a connecting part 51 and a heating support part 52 connected in sequence. The outer diameter of the heating support part 52 is larger than the outer diameter of the connecting part 51. The glue outlet is located on the side of the heating support part 52 away from the connecting part 51. The spring heater 3 surrounds the outside of the heating support part 52. This application provides a heating support part 52 for winding the spring heater 3 in the nozzle core body, so that the spring heater 3 directly surrounds the nozzle core body to heat the nozzle core. Since the spring heater 3 is directly sleeved outside the glue dispensing channel of the nozzle core body, it can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the glue, it can replenish the heat flow lost by the glue during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0052] Example 1

[0053] like Figures 3-10 As shown, this application provides a nozzle core, including a nozzle core body and a spring heater 3. The nozzle core body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet. The nozzle core body includes a connecting part 51 and a heating support part 52 connected in sequence. The outer diameter of the heating support part 52 is larger than the outer diameter of the connecting part 51. The glue outlet is located on the side of the heating support part 52 away from the connecting part 51. The spring heater 3 surrounds the outside of the heating support part 52.

[0054] Furthermore, the outer side of the connecting part 51 is provided with an external thread for connecting the hot nozzle body 2.

[0055] In this application, the hot nozzle body 2 has a hollow flow channel inside, and the end of the flow channel has an internal thread. The outer side of the connecting part 51 has an external thread that matches the internal thread at the end of the flow channel. The nozzle core and the hot nozzle body 2 are fixedly connected together through the external thread in the connecting part 51, and the flow channel and the dispensing channel are connected. The fixed connection between the nozzle core and the hot nozzle body 2 is achieved through a threaded connection, which is convenient to operate and has a simple structure.

[0056] Furthermore, the heating support portion 52 is provided with an adhesive dispensing portion 54 on the side away from the connecting portion 51. The adhesive dispensing portion 54 has a frustum-shaped structure, and the cross-sectional area of ​​the adhesive dispensing portion 54 on the side away from the heating support portion 52 is smaller than the cross-sectional area of ​​the adhesive dispensing portion 54 on the side close to the heating support portion 52. The adhesive outlet is provided on the side of the adhesive dispensing portion 54 away from the heating support portion 52.

[0057] In this application, the dispensing section 54 is located at the end of the dispensing channel. At the end of the dispensing channel, the nozzle body retracts inward to form a frustum-shaped dispensing section 54, which facilitates the accumulation of adhesive material within the dispensing channel before output. The frustum-shaped dispensing section 54 ensures that the adhesive material accumulates before output, thereby increasing the dispensing flow rate of the adhesive material.

[0058] Furthermore, a sealing part 55 is provided between the glue dispensing part 54 and the heating support part 52. The sealing part 55 has a cylindrical structure, and the cross-sectional area of ​​the sealing part 55 is larger than the cross-sectional area of ​​the glue dispensing part 54.

[0059] When the hot nozzle formed by assembling the nozzle core and the hot nozzle body 2 is installed in the injection mold, the injection mold is provided with a groove that matches the frustum-shaped dispensing part 54. A hopper 8 is formed between the groove and the dispensing part 54. That is, the glue in the dispensing channel first flows into the hopper 8 through the dispensing port, and then enters the injection cavity from the hopper 8. In order to prevent the glue inside the hopper 8 from overflowing from the top of the nozzle core, a sealing part 55 is provided between the dispensing part 54 and the heating support part 52. The sealing part 55 is used to seal the glue inside the hopper 8 to ensure that it enters the injection cavity instead of overflowing from the top of the nozzle core.

[0060] Furthermore, in the direction parallel to the dispensing channel, the size of the dispensing portion 54 is 1.99mm-2.01mm.

[0061] During the process of the rubber material in the hopper 8 entering the injection molding cavity, pressure needs to be applied to it. In order to prevent the rubber material in the hopper 8 from being ejected from the dispensing part 54 under this pressure, this application requires that the dispensing part 54 has a certain height to resist the impact force of the rubber material in the hopper 8. When the height of the dispensing part 54 is set to 1.99mm-2.01mm, this application can not only prevent the rubber material in the hopper 8 from overflowing, but also prevent the sealing part 55 from being too high, which would cause the heat in the heating support part 52 to be unable to be transferred to the dispensing part in time, resulting in the dispensing part temperature being too low.

[0062] Furthermore, a groove 53 is provided between the sealing part 55 and the heating support part 52; the outer diameter of the heating support part 52 is larger than the outer diameter of the sealing part 55.

[0063] The function of the slot 53 is to snap the sleeve 1 onto the outside of the hot nozzle body 2 to protect the hot nozzle body 2. At the same time, both the heating support part 52 and the hot nozzle body 2 need to be wound with spring heaters 3. Therefore, it is necessary to ensure that the outer diameter of the heating support part 52 is equal to the outer diameter of the hot nozzle body 2, and the outer diameter of the sealing part 55 is smaller than the outer diameter of the hot nozzle body 2 to match the top of the hopper 8. This ensures the sealing of the hopper 8 while improving the temperature transfer efficiency at the dispensing port.

[0064] Example 3

[0065] This application provides a type of hot nozzle, such as Figures 6-9 As shown, the device includes a hot nozzle body 2, a nozzle core, and a sleeve 1. The hot nozzle body 2 has a hollow flow channel, and the nozzle core has a hollow dispensing channel. The nozzle core is installed at the end of the flow channel, allowing the adhesive material in the flow channel to be discharged from the flow channel. The sleeve 1 is fitted onto the outside of the hot nozzle body 2 to protect the hot nozzle body 2 from external damage.

[0066] like Figures 3-5 As shown, the nozzle core includes a nozzle core body and a spring heater 3. The nozzle core body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet. The nozzle core body includes a connecting part 51, a heating support part 52, a sealing part 55, and a glue dispensing part 54 connected in sequence. The outer side of the connecting part 51 is provided with an external thread for connecting to the hot nozzle body 2; the inner side of the end of the hot nozzle body 2 is provided with a matching internal thread.

[0067] The outer diameter of the heating support portion 52 is equal to the outer diameter of the hot nozzle body 2. The connecting portion 51 is connected to the inner end of the hot nozzle body 2. The spring heater 3 surrounds the outer sides of the heating support portion 52 and the hot nozzle body 2. The outer diameter of the heating support portion 52 needs to be larger than the outer diameters of the connecting portion 51, the sealing portion 55, and the dispensing portion 54. The outer diameter of the heating support portion 52 is larger than the outer diameter of the connecting portion 51 and equal to the outer diameter of the hot nozzle body 2, ensuring that the spring heater 3 can simultaneously surround the outer side of the heating support portion 52 in both the hot nozzle body 2 and the nozzle core, for simultaneously heating the hot nozzle body 2 and the nozzle core.

[0068] In this application, the dispensing part 54 has a frustum-shaped structure, and the cross-sectional area of ​​the dispensing part 54 on the side away from the heating support part 52 is smaller than the cross-sectional area of ​​the dispensing part 54 on the side closer to the heating support part 52; the dispensing port is provided on the side of the dispensing part 54 away from the heating support part 52. That is, the dispensing part 54 is located at the end of the dispensing channel. At the end of the dispensing channel, the nozzle core body retracts inward to form a frustum-shaped dispensing part 54, which facilitates the accumulation of adhesive material in the dispensing channel before output.

[0069] After the nozzle core and the hot nozzle body 2 are connected by threads, they need to be assembled in the injection mold, such as... Figure 10 As shown, the injection mold has a groove that matches the frustum-shaped dispensing section 54. A hopper 8 is formed between the groove and the dispensing section 54. The adhesive material in the dispensing channel first flows into the hopper 8 through the dispensing port, and then enters the injection cavity from inside the hopper 8. The sealing section 55 is interference-fitted with the injection mold to prevent adhesive material from overflowing from the top of the hopper 8, thus ensuring the effectiveness of the hot runner sealing and preventing adhesive leakage.

[0070] During the process of the rubber material in the hopper 8 entering the injection molding cavity, pressure needs to be applied to it. In order to prevent the rubber material in the hopper 8 from being ejected from the dispensing part 54 under this pressure, this application requires that the dispensing part 54 has a certain height to resist the impact force of the rubber material in the hopper 8. When the height of the dispensing part 54 is set to 1.99mm-2.01mm, this application can not only prevent the rubber material in the hopper 8 from overflowing, but also prevent the sealing part 55 from being too high, which would cause the heat in the heating support part 52 to be unable to be transferred to the dispensing part in time, resulting in the dispensing part temperature being too low.

[0071] The sealing part 55 has a cylindrical structure, and its cross-sectional area is larger than that of the dispensing part 54. The sealing part 55 is in contact with the injection mold, and the sealing ring 12 and the injection mold are interference-fitted, thus achieving the sealing function. In actual use, the nozzle core is heated by the spring heater 3, while the injection mold is at room temperature. The temperature difference between the sealing part 55 and the injection mold causes heat to transfer from the sealing part 55 to the injection mold. In this application, the spring heater 3 acts directly on the heating support part 52 above the sealing ring 12, efficiently heating the nozzle core and significantly improving its heating effect, thus avoiding temperature drops caused by heat loss.

[0072] The sleeve 1 of this application is sleeved on the outside of the hot nozzle body 2, and the sleeve 1 and the nozzle core are connected by a retaining ring 4, which is engaged in the groove 53 between the sealing part 55 and the heating support part 52.

[0073] The assembly process of the hot runner in this embodiment is as follows:

[0074] First, the heating nozzle body 2 and the connecting part 51 in the nozzle core are fixed together by threaded connection, as shown in the diagram. Figure 8 As shown; next, the spring heater 3 is assembled on the outside of the heating support 52 and the heating nozzle body 2, as shown. Figure 7 As shown; finally, the sleeve 1 is fitted onto the outside of the hot nozzle body 2, and the retaining ring 4 is engaged in the retaining groove 53, thus fixing the sleeve 1 to the outside of the hot nozzle body 2 through the retaining ring 4, as shown. Figure 9 As shown.

[0075] In this application, the spring heating tube is directly wound around the nozzle body 2 and the sealing ring 12 nozzle core. The spring heating tube can directly heat the nozzle core, improving the heating effect of the nozzle core. Compared with the existing nozzle structure, this application provides a heating support part 52 for winding the spring heater 3 in the nozzle core body, so that the spring heater 3 is directly wrapped around the nozzle core body to heat the nozzle core. Since the spring heater 3 is directly sleeved outside the glue outlet channel of the nozzle core body, it can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than the temperature of the glue, it can replenish the heat flow lost by the glue during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0076] Example 4

[0077] This application provides an injection mold, including a hot nozzle as described above, such as... Figure 10 As shown, the injection mold has a groove that matches the frustum-shaped dispensing section 54. A hopper 8 is formed between the groove and the dispensing section 54. The adhesive material in the dispensing channel first flows into the hopper 8 through the dispensing port, and then enters the injection cavity from inside the hopper 8. The sealing section 55 is interference-fitted with the injection mold to prevent adhesive material from overflowing from the top of the hopper 8, thus ensuring the effectiveness of the hot runner sealing and preventing adhesive leakage.

[0078] During the process of the rubber material in the hopper 8 entering the injection molding cavity, pressure needs to be applied to it. In order to prevent the rubber material in the hopper 8 from being ejected from the dispensing part 54 under this pressure, this application requires that the dispensing part 54 has a certain height to resist the impact force of the rubber material in the hopper 8. When the height of the dispensing part 54 is set to 1.99mm-2.01mm, this application can not only prevent the rubber material in the hopper 8 from overflowing, but also prevent the sealing part 55 from being too high, which would cause the heat in the heating support part 52 to be unable to be transferred to the dispensing part in time, resulting in the dispensing part temperature being too low.

[0079] This application can ensure that the nozzle core heats up quickly and maintains a high temperature. When the temperature of the nozzle core is slightly higher than that of the rubber compound, it can replenish the heat flow lost by the rubber compound during the filling process, improve its fluidity, reduce the thickness of the solidified layer, and achieve rapid color change.

[0080] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0081] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0082] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0083] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A type of mouthpiece, characterized in that, Includes the nozzle body and spring heater (3), The nozzle body has a hollow glue dispensing channel inside, and the end of the glue dispensing channel is a glue outlet; the nozzle body includes a connecting part (51) and a heating support part (52) connected in sequence, the outer diameter of the heating support part (52) is larger than the outer diameter of the connecting part (51), and the glue outlet is located on the side of the heating support part (52) away from the connecting part (51). The spring heater (3) surrounds the outside of the heating support (52).

2. A nozzle core according to claim 1, characterized in that, The outer side of the connecting part (51) is provided with an external thread for connecting the hot nozzle body (2).

3. A nozzle core according to claim 1, characterized in that, The heating support part (52) is provided with a glue outlet (54) on the side away from the connecting part (51). The glue outlet (54) has a frustum-shaped structure, and the cross-sectional area of ​​the glue outlet (54) on the side away from the heating support part (52) is smaller than the cross-sectional area of ​​the glue outlet (54) on the side close to the heating support part (52). The glue outlet is provided on the side of the glue outlet (54) away from the heating support part (52).

4. A nozzle core according to claim 3, characterized in that, A sealing part (55) is provided between the glue dispensing part (54) and the heating support part (52), and the sealing part (55) has a cylindrical structure; and the cross-sectional area of ​​the sealing part (55) is larger than the cross-sectional area of ​​the glue dispensing part (54).

5. A nozzle core according to claim 4, characterized in that, In the direction parallel to the dispensing channel, the size of the dispensing part (54) is 1.99mm-2.01mm.

6. A nozzle core according to claim 4, characterized in that, A slot (53) is provided between the sealing part (55) and the heating support part (52); the outer diameter of the heating support part (52) is larger than the outer diameter of the sealing part (55).

7. A heating nozzle, characterized in that, It includes a hot nozzle body (2) and a nozzle core as described in any one of claims 1-6; the connecting part (51) in the nozzle core is connected to the hot nozzle body (2).

8. A heating nozzle according to claim 7, characterized in that, The outer diameter of the heating support (52) is equal to the outer diameter of the hot nozzle body (2), the connecting part (51) is connected to the inner side of the end of the hot nozzle body (2), and the spring heater (3) surrounds the outer side of the heating support (52) and the hot nozzle body (2).

9. A heating nozzle according to claim 7 or 8, characterized in that, The hot nozzle also includes a retaining ring (4) and a sleeve (1). The sleeve (1) is fitted onto the outside of the hot nozzle body (2), and the sleeve (1) and the nozzle core are engaged by the retaining ring (4).

10. A plastic mold, characterized in that, Includes a heat nozzle as described in any one of claims 7-9.

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