Mold for injection molding of the pole body

Abstract

The embodiment of the present application provides a mold for injection molding of a pole body, including two main molds, the two main molds can be surrounded to form a cavity for accommodating the pole body, and the cavity includes a first cavity and a second cavity. Each main mold is formed by splicing a plurality of sub-molds, and the plurality of sub-molds are distributed at least along a first direction. Along the first direction, each two adjacent sub-molds are spliced ​​together to form a groove; the plurality of sub-molds include a first sub-mold, and the second cavity is formed by surrounding the first sub-molds of the two main molds, and the first sub-mold independently forms at least one groove. The mold for injection molding of the pole body provided by the embodiment of the present application has low processing difficulty and can improve the aesthetics of the injection molded product.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of electrical equipment, and in particular to a mold for injection molding a pole body. Background Art

[0002] The outer surface of the pole of the pole-mounted circuit breaker forms an umbrella skirt, which has the functions of waterproofing and dustproofing, increasing the creepage distance, and optimizing the electrical performance of the pole.

[0003] Umbrella skirts are usually formed by injection molding. In the related art, the molds used in injection molding to form umbrella skirts are difficult to process, and the finished products obtained by injection molding are not beautiful enough. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide a mold for injection molding a pole body, which has low processing difficulty and can improve the aesthetics of the injection-molded product.

[0005] An embodiment of the present application provides a mold for injection molding of a pole body, the mold for injection molding of the pole body comprising: two main molds, which are detachably connected to each other, the two main molds can enclose a cavity for accommodating the pole body, the inner surface of the cavity is recessed to form a plurality of grooves, and the grooves are used to form an umbrella skirt on the outer surface of the pole body; the cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are connected to each other, the first cavity extends along a first direction, the second cavity is located on one side of the first cavity along a second direction, and the first direction is perpendicular to the second direction; each of the main molds is formed by splicing a plurality of sub-molds, the plurality of sub-molds are distributed at least along the first direction, and along the first direction, each adjacent two sub-molds are spliced ​​together to form a groove; the plurality of sub-molds include a first sub-mold, the second cavity is formed by enclosing the first sub-molds of the two main molds, and the first sub-mold independently forms at least one groove.

[0006] In some embodiments, the multiple sub-molds include multiple second sub-molds, the first sub-mold and the multiple second sub-molds are distributed along a first direction, at least one second sub-mold is arranged on each of the opposite sides of the first sub-mold along the first direction, and the first cavity is formed by the first sub-molds and the second sub-molds of the two main molds.

[0007] In some embodiments, the mold cavity also includes a third mold cavity, which is located on the side of the second mold cavity away from the first mold cavity and is connected to the second mold cavity; the multiple sub-molds also include at least one third sub-mold, which is arranged on one side of the first sub-mold along the second direction, and the third mold cavity is formed by the third sub-molds of the two main molds.

[0008] In some embodiments, there are multiple third sub-molds, and the multiple third sub-molds are distributed along the second direction, and every two adjacent third sub-molds are jointly arranged to form a molding groove.

[0009] In some embodiments, in a projection plane perpendicular to the second direction, the projection of the third sub-mold covers the projection of the first sub-mold and covers at least a portion of the projection of the second sub-mold.

[0010] In some embodiments, in a projection plane perpendicular to the second direction, at least one projection of the second sub-mold and a projection of the third sub-mold are staggered at respective opposite ends of the main mold along the first direction.

[0011] In some embodiments, along the second direction, at least one of the third sub-molds protrudes from the end surface of each of the second sub-molds.

[0012] In some embodiments, each of the main molds has an abutment surface for abutting against another main mold, and the abutment surface of at least one of the main molds is recessed to form a strip groove, and the strip groove extends along the outer contour of the cavity.

[0013] In some embodiments, the mold for injection molding the pole body further includes: a core mold, which is detachably disposed between the two main molds, and the core mold is used to at least partially fill the cavity inside the pole body.

[0014] In some embodiments, the second direction is the direction of gravity, the second cavity is located at the bottom side of the first cavity, and the bottom surfaces of the two main molds form an injection port.

[0015] The mold for injection molding of the pole body provided in the embodiment of the present application has low processing difficulty and can improve the aesthetics of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A side view of a mold for injection molding a pole body according to an embodiment of the present application;

[0017] Figure 2 for Figure 1 AA section schematic diagram of a mold for injection molding a pole body, wherein the pole body is assembled in the cavity;

[0018] Figure 3 This is a schematic diagram of the structure of the main mold of an embodiment of the present application;

[0019] Figure 4 for Figure 2 A schematic diagram of a pole body adapted to the mold in FIG.

[0020] Figure 5 for Figure 3 A magnified schematic diagram of part B;

[0021] Figure 6 for Figure 3 Enlarged schematic diagram of part C.

[0022] Description of Reference Numerals

[0023] 10. Mold; 1. Main mold; 1a. Abutment surface; 1b. Strip groove; 1c. Injection port; 1d. Injection groove; 11. Cavity; 11a. First cavity; 11b. Second cavity; 11c. Third cavity; 12. Groove; 13. Sub-mold; 13a. First sub-mold; 13b. Second sub-mold; 13c. Third sub-mold; 2. Core mold; 3. Injection tube; 3a. Opening; 20. Pole body; 21. Columnar part; 22. Raised part; 23. Outlet part; 30. Vacuum arc extinguishing chamber; 40. Conductive rod; 50. Coil. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of the specific technical features in the present invention will not be described separately.

[0026] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0027] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0028] In the description of the present application, the orientation or position relationship of "first direction", "second direction" and "third direction" is based on the orientation or position relationship shown in the accompanying drawings, wherein the "first direction" is the direction indicated by the arrow L1 in the accompanying drawings, the "second direction" is the direction indicated by the arrow L2 in the accompanying drawings, and the "third direction" is the direction indicated by the arrow L3 in the accompanying drawings. It should be understood that these orientation terms 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 should not be understood as a limitation on the present application.

[0029] For ease of understanding, the following will first introduce the pole adapted by the mold of the embodiment of the present application.

[0030] The pole is used in pole-mounted circuit breakers. The pole usually includes a pole body, a vacuum interrupter, a conductive rod, a current sensor, a voltage sensor, an insulating pull rod, etc. The pole body is prepared by injection molding, and the vacuum interrupter, the conductive rod and the current sensor are sealed in the pole body.

[0031] One end of the vacuum interrupter is connected to the incoming line, and the other end is connected to the flexible connector conductive rod. The end of the conductive rod away from the vacuum interrupter leads to the outgoing line. The current sensor ring is arranged on the outside of the conductive rod. The incoming line, vacuum interrupter and outgoing line form a path. The flexible connector is also connected to the insulating rod. When the current sensor, voltage sensor, etc. detect that the distribution network line is abnormal, the mechanism box of the pole-mounted circuit breaker pulls the insulating rod to disconnect the flexible connector from the vacuum interrupter, thereby disconnecting the above path to achieve the effect of isolating the fault.

[0032] The embodiment of the present application provides a mold, which is used to perform injection molding on the above-mentioned pole body, so as to form a coating layer and a plurality of sheds on the outer surface of the pole body. As an example, the pole body is usually formed by casting epoxy resin, and the injection molding material when the pole body is injection molded using the mold of the embodiment of the present application can be selected as silicone.

[0033] Reference Figure 1-Figure 3 The mold 10 for injection molding the pole body according to the embodiment of the present application includes two main molds 1 , which are detachably connected to each other, and the two main molds 1 can enclose a cavity 11 for accommodating the pole body 20 .

[0034] It can be understood that in the actual injection molding process, one of the main molds 1 can be used as a fixed mold, and the other main mold 1 can be used as a movable mold.

[0035] In this embodiment, the cavity 11 includes a first cavity 11a and a second cavity 11b. The first cavity 11a and the second cavity 11b are connected to each other. The first cavity 11a extends along a first direction, and the second cavity 11b is located on one side of the first cavity 11a along a second direction. The first direction and the second direction are perpendicular.

[0036] As an example, the two main molds 1 may be distributed along a third direction so that the two main molds 1 can be connected to each other to enclose and form the above-mentioned cavity 11, and the first direction, the second direction and the third direction are perpendicular to each other.

[0037] Reference Figure 2 and Figure 4 The vacuum interrupter 30, the conductive rod 40 and the coil 50 of the current sensor of the pole are sealed in the pole body 20. The extension direction of the conductive rod 40 is usually perpendicular to the axial direction of the pole body 20, so that the pole body 20 includes a columnar part 21 and a raised part 22 protruding from the axial surface of the columnar body. The vacuum interrupter 30 is located in the columnar part 21, and the conductive rod 40 and the coil 50 of the current sensor are located in the raised part 22.

[0038] In this embodiment, the first cavity 11 a is used to accommodate the columnar portion 21 of the pole body 20 , and the second cavity 11 b is used to accommodate the convex portion 22 of the pole body 20 .

[0039] The specific shapes of the first cavity 11a and the second cavity 11b can be determined according to the specific shape of the actual pole body 20, and there is no limitation on this. It should be noted that when the pole body 20 is placed in the cavity 11, a gap needs to be formed between the cavity wall of the cavity 11 and the outer surface of the pole body 20 so that the injection molding material can form a coating layer on the outer surface of the pole body 20.

[0040] The inner surface of the cavity 11 is concave to form a plurality of grooves 12, and the grooves 12 are used to form sheds on the outer surface of the pole body 20. In this embodiment, the specific number and position of the grooves 12 can be specifically determined according to actual use requirements, and there is no limitation to this.

[0041] In the mold provided by the related art, the fixed mold and the movable mold are both integrally formed structures, and it is difficult to form multiple grooves 12 on the fixed mold. In addition, once a groove 12 is processed incorrectly or damaged at a certain position, the entire fixed mold or movable mold can only be scrapped, resulting in increased processing and use costs.

[0042] In this embodiment, referring to Figure 3Each main mold 1 is formed by splicing a plurality of sub-molds 13. Thus, in the actual production process, the sub-molds 13 can be processed first, and then the sub-molds 13 can be spliced ​​into the main mold 1. The difficulty of processing the sub-molds 13 separately is obviously less than the difficulty of directly processing the main mold 1. Moreover, even if an error occurs during the processing of one of the sub-molds 13, or it is damaged during use, only the sub-mold 13 needs to be scrapped, and the other sub-molds 13 can still be used normally, thereby reducing the production and use costs.

[0043] In this embodiment, the specific splicing method of the multiple sub-molds 13 is not limited, and the splicing can be completed by bolt connection, clamping, welding, etc.

[0044] It is understandable that a seam will inevitably form at the joint of two adjacent sub-molds 13. During the injection molding process, the injection molding material may extend into the seam of the two adjacent sub-molds 13, thereby forming a seam line on the outer surface of the finished product, affecting the aesthetics of the product.

[0045] In this embodiment, referring to Figure 3 and Figure 5 Along the first direction, every two adjacent sub-molds 13 are spliced ​​together to form a groove 12, that is, the seam of the sub-molds 13 is located in the groove 12. In this way, the splicing line after injection molding will be formed on the outside of the umbrella skirt, which has little effect on the aesthetics of the product and is easy to remove through subsequent processing.

[0046] Further, refer to Figure 4 The columnar portion 21 of the pole body 20 includes a connecting section, which is used to connect with the raised portion 22. Since the sheds are generally required to be relatively evenly distributed on the outer surface of the pole body in the art, sheds are also required to be formed on the outer surface of the connecting section.

[0047] In order to reduce the difficulty of processing, the part of the main mold 1 corresponding to the connecting section can actually be formed by splicing multiple sub-molds 13. However, it is pointed out in the present application that the umbrella skirt on the connecting section usually does not extend to the end of the raised portion 22 away from the columnar portion 21. If the part of the main mold 1 corresponding to the above-mentioned connecting section is arranged to be formed by splicing multiple sub-molds 13, then after the injection molding is completed, multiple splicing lines will be formed on the outer surface of the pole corresponding to the raised portion 22, resulting in a decrease in the aesthetics of the product.

[0048] For this purpose, refer to Figure 3 In this embodiment, the plurality of sub-molds 13 include a first sub-mold 13 a , the second cavity 11 b is formed by the first sub-molds 13 a of the two main molds 1 , and the first sub-mold 13 a independently forms at least one groove 12 .

[0049] Here, the second cavity 11b is formed by the first sub-molds 13a of the two main molds 1, which should be understood as the second cavity 11b is only formed by the first sub-molds 13a of the two main molds 1. In other words, the other sub-molds 13 of the main mold 1 do not participate in the formation of the second cavity 11b. The first sub-mold 13a independently forms at least one groove 12, which should be understood as the at least one groove 12 on the first sub-mold 13a is formed by the structure of the first sub-mold 13a itself rather than by the first sub-mold 13a and other adjacent sub-molds 13. Figure 3 For example, Figure 3 The first sub-mold 13a independently forms two grooves 12, and the first sub-mold 13a is also spliced ​​with other sub-molds 13 on both sides to form two grooves 12.

[0050] In this embodiment, refer to Figure 3 Along the second direction, the first sub-mold 13a may specifically include a first part and a second part connected to each other, the first part is used to enclose and form a first cavity 11a, the second part is used to enclose and form a second cavity 11b, and the first part independently forms at least one groove 12.

[0051] In this embodiment, the portion of the main mold 1 corresponding to the above-mentioned connecting section is configured to be formed by a first sub-mold 13a, rather than being configured to be formed by splicing a plurality of sub-molds 13, so that the aesthetics of the product can be improved.

[0052] In summary, the mold 10 for injection molding of the pole body provided in the embodiment of the present application has low processing difficulty and can improve the aesthetics of the injection-molded product.

[0053] In some embodiments, reference Figure 3 The multiple sub-molds 13 include multiple second sub-molds 13b. The first sub-mold 13a and the multiple second sub-molds 13b are distributed along the first direction. At least one second sub-mold 13b is arranged on each opposite side of the first sub-mold 13a along the first direction. The first cavity 11a is formed by the first sub-molds 13a and the second sub-molds 13b of the two main molds 1.

[0054] In this embodiment, at least one second sub-mold 13b is provided on both sides of the first sub-mold 13a along the first direction. In this way, the parts of the main mold 1 corresponding to the other sections other than the connecting section with the columnar part 21 are formed by as many sub-molds 13 as possible, thereby reducing the processing difficulty as much as possible while taking into account the aesthetics of the finished product.

[0055] As an example, see Figure 3 Among the multiple grooves 12 distributed along the first direction, except for the grooves 12 independently formed by the first sub-mold 13a, the other grooves 12 are formed by two adjacent second sub-molds 13b, or the second sub-mold 13b is spliced ​​with the adjacent first sub-mold 13a, so as to reduce the processing difficulty to the greatest extent.

[0056] In some embodiments, reference Figure 2 and 3 The mold cavity 11 further includes a third mold cavity 11c, which is located on the side of the second mold cavity 11b away from the first mold cavity 11a and is connected to the second mold cavity 11b. The plurality of sub-molds 13 further include at least one third sub-mold 13c, which is arranged on one side of the first sub-mold 13a along the second direction, and the third mold cavity 11c is formed by the third sub-molds 13c of the two main molds 1.

[0057] Reference Figure 2 and 4 It can be understood that along the extension direction of the conductive rod 40, the length of the coil 50 of the current sensor is usually smaller than the length of the conductive rod 40. Therefore, the pole body 20 usually also includes an outlet portion 23, which is located on the side of the protruding portion 22 away from the columnar portion 21.

[0058] For this purpose, refer to Figure 2 and Figure 3 In this embodiment, the cavity 11 also includes a third cavity 11c, which is located on the side of the second cavity 11b away from the first cavity 11a and is connected to the second cavity 11b. The multiple sub-molds 13 also include at least one third sub-mold 13c, which is arranged on one side of the first sub-mold 13a along the second direction. The third cavity 11c is formed by the third sub-molds 13c of the two main molds 1.

[0059] In this embodiment, the third cavity 11c is formed by the third sub-mold 13c, which helps to further reduce the difficulty of processing. In some other embodiments, the third sub-mold 13c may not be provided, and the third cavity 11c may be formed by the first sub-mold 13a.

[0060] In some embodiments, reference Figure 3 The number of the third sub-molds 13c is multiple, and the multiple third sub-molds 13c are distributed along the second direction, and each two adjacent third sub-molds 13c are jointly arranged to form a groove 12. Since the outlet portion 23 of the pole also needs to form an umbrella skirt, in this embodiment, the part of the main mold 1 corresponding to the outlet portion 23 is further divided into multiple third sub-molds 13c, so as to further reduce the processing difficulty while taking into account the aesthetics.

[0061] In some other embodiments, the main mold 1 may also include only one third main mold 1 , and the third main mold 1 independently forms at least one molding groove 12 .

[0062] In some embodiments, reference Figure 3In the projection plane perpendicular to the second direction, the projection of the third sub-mold 13c covers the projection of the first sub-mold 13a and covers at least a portion of the projection of the second sub-mold 13b.

[0063] In this embodiment, this splicing method helps to reduce the possibility of relative movement between the first sub-mold 13a, the second sub-mold 13b and the third sub-mold 13c, thereby helping to improve the structural strength and service life of the main mold 1, and helps to reduce the possibility of large seams between the sub-molds 13, thereby improving the aesthetics of the product.

[0064] Of course, in some other embodiments, in the projection plane perpendicular to the second direction, the projection of the third sub-mold 13c may also only cover the projection of the first sub-mold 13a.

[0065] In some embodiments, in the projection plane perpendicular to the second direction, at least one projection of the second sub-mold 13b and the projection of the third sub-mold 13c are staggered at opposite ends of the main mold 1 along the first direction. Figure 3 For example, the projections of the two second sub-molds 13b at the left end of the main mold 1 and the projection of the first sub-mold 13a at the right end are staggered with the projection of the third sub-mold 13c.

[0066] It is understood that the air in the cavity 11 needs to be exhausted during the injection molding process. Insufficient exhaust will cause bubbles to appear in the injection molded product, affecting product performance and aesthetics. The joint formed by the adjacent sub-molds 13 is an effective exhaust path. In this embodiment, the end surface of the main mold 1 corresponding to the third sub-mold 13c ( Figure 3 At least two seams will be formed on the bottom end surface of the third sub-mold 13c (assuming that the projection of the third sub-mold 13c covers the entire second sub-mold 13b, no seam will be formed on the side end surface), which helps to improve the exhaust efficiency in this direction and reduce the possibility of injection bubbles at this position.

[0067] In some embodiments, still referring to Figure 3 , along the second direction, at least one third sub-mold 13c protrudes from the end surface of each second sub-mold 13b. This arrangement helps to reduce the overall volume of the main mold 1, and can reduce the processing consumables and processing difficulty of the main mold 1. Specifically, Figure 3 As shown, a portion of the third sub-mold 13c does not protrude from the end faces of each second sub-mold 13b, and is clamped between the second sub-molds 13b at both ends of the mold. The entire mold has good integrity and stability, and another portion of the third sub-mold 13c protrudes from the end faces of each second sub-mold 13b.

[0068] In some embodiments, reference Figure 3 and Figure 6Each main mold 1 has an abutting surface 1 a for abutting against another main mold 1 . The abutting surface 1 a of at least one main mold 1 is recessed to form a strip groove 1 b , and the strip groove 1 b extends along the outer contour of the cavity 11 .

[0069] It can be understood that in addition to the joints between the sub-molds 13 that form the splicing line, there are also joints between the two main molds 1, and a splicing line may also be formed on the outer surface of the pole. In this embodiment, a strip groove 1b extending along the outer contour of the cavity 11 is provided. During the injection molding process, the injection material will flow into the strip groove 1b through the joint between the two main molds 1. After the injection molding is completed, the injection material in the strip groove 1b will form an injection strip, and the injection material in the joint will form an injection sheet. After the mold 10 is removed, the injection sheet can be torn off through the injection strip, thereby improving the aesthetics of the product.

[0070] In this embodiment, the specific extension range of the strip groove 1 b is not limited. As an example, the extension range of the strip groove 1 b can cover almost the entire outer contour of the cavity 11 .

[0071] In some embodiments, reference Figure 2 The mold 10 for injection molding the pole body further includes a core mold 2 , which is detachably disposed between the two main molds 1 , and the core mold 2 is used to at least partially fill the cavity inside the pole body 20 .

[0072] As mentioned above, the pole body 20 needs to be installed with electrical components such as voltage sensors and power taking devices, so an installation cavity is formed inside the pole body 20. Of course, in addition to the installation cavity, other cavities may be formed inside the pole body 20. These cavities may be flattened due to the high pressure during the injection molding process, thereby causing damage to the pole. Therefore, the mold 10 for injection molding the pole body in this embodiment is provided with a detachable core mold 2, which can provide support for the above-mentioned cavity during the injection molding process, thereby reducing the possibility of the pole body 20 being flattened.

[0073] In this embodiment, the specific structure of the core mold 2 can be determined according to the shape of the cavity inside the pole body 20, and there is no limitation to this.

[0074] Further, it can be understood that the pole body 20 is also usually formed by injection molding, so the core mold 2 in this embodiment can be universal with the core pulling when the pole body 20 is formed by injection molding.

[0075] In some embodiments, the second direction is the direction of gravity, the second cavity 11 b is located at the bottom side of the first cavity 11 a , and the bottom surfaces of the two main molds 1 form an injection port 1 c .

[0076] It can be understood that the size of the cavity 11 in the first direction is greater than the size in the second direction. If the first direction is the direction of gravity, it may take a lot of pressure to make the injection material reach the top. In this embodiment, the second direction is the direction of gravity, and the injection port 1c is formed on the bottom surface of the main mold 1. In this way, the injection height can be reduced, thereby reducing the pressure required for injection. On the other hand, it can be understood that as the height increases, the fluidity of the injection material will gradually deteriorate. In this embodiment, the second cavity 11b is located on the bottom side of the first cavity 11a, that is, the injection material will first flow through the second cavity 11b and then flow through the first cavity 11a. Since the structure of the first cavity 11a is relatively simple, even if the fluidity component of the injection material deteriorates, the probability of forming obvious pores is low, which helps to further improve the aesthetics and quality of the product.

[0077] Further, refer to Figure 2 In some embodiments, the mold 10 for injection molding the pole body includes two injection molding tubes 3, which are respectively located on opposite sides of the second cavity 11b along the first direction. The injection molding tubes 3 have openings 3a for communicating with the cavity 11, and the two injection molding tubes 3 have different numbers of openings 3a.

[0078] It can be understood that the pole body 20 is a special-shaped structure. With the central axis of the second cavity 11b as the dividing line, the volume of the first cavity 11a located on one side of the dividing line and the volume of the first cavity 11a located on the other side of the dividing line are different. This results in that the speed of the injection material rising on both sides may be inconsistent during the injection molding process. Figure 2 For example, the rising speed on the left side may be slower than that on the right side, which may cause the confluence point of the injection material to be not at the upper end, but at other uncertain positions. In this case, bubbles are easily generated during injection molding.

[0079] To this end, in this embodiment, the numbers of openings 3a of the two injection molding tubes 3 are set to be different. Specifically, Figure 2 The number of openings 3a on the left side (i.e. the lower half of the pole) should be greater than Figure 2 The number of openings 3a on the right side (i.e., the upper half of the pole) is less than or equal to 2. By setting the injection tube 3 and its openings 3a in this way, the injection material spreading from the left side and the injection material spreading from the right side can finally merge at the upper left corner of the cavity (i.e., merge at the side below the pole and away from the outlet end). Since the pole is not provided with an umbrella skirt at this point, the structure is relatively simple, so the confluence point of the injection materials on the left and right sides will not be very complicated, and it is not easy to generate bubbles that are difficult to discharge. For example, Figure 2The injection tube 3 on the left side has three openings 3a, and the injection tube 3 on the right side has two openings 3a. In this way, the difference between the rising speeds of the injection materials on both sides can be reduced to a certain extent, which helps to keep the confluence point at the top of the first cavity 11a and close to the left side, reducing the probability of bubbles generated by injection molding.

[0080] In some embodiments, reference Figure 2 and Figure 3 Each main mold 1 has a contact surface 1a for contacting with another main mold 1, and the contact surface 1a is recessed to form an injection groove 1d. The injection grooves 1d of the two main molds 1 are surrounded to form an injection cavity, and the injection cavity is used to accommodate the injection tube 3.

[0081] In the related art, the injection channel is usually formed by the gap between the fixed mold and the movable mold. In this embodiment, the two main molds 1 are arranged to form an injection cavity for accommodating the injection tube 3. This helps to improve the air tightness of the injection tube 3 and further increase the injection pressure.

[0082] It should be noted that, in some other embodiments, the main mold 1 may not form the injection groove 1 d , and the injection tube 3 may also be directly disposed in the gap between the two main molds 1 .

[0083] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0084] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mold for injection molding a pole body, characterized in that: The mold comprises: Two main molds are detachably connected to each other, and the two main molds can enclose a cavity for accommodating the pole body, and the inner surface of the cavity is recessed to form a plurality of grooves, and the grooves are used to form an umbrella skirt on the outer surface of the pole body; The mold cavity comprises a first mold cavity and a second mold cavity, the first mold cavity and the second mold cavity are connected to each other, the first mold cavity extends along a first direction, the second mold cavity is located on one side of the first mold cavity along a second direction, and the first direction is perpendicular to the second direction; Each of the main molds is formed by splicing a plurality of sub-molds, wherein the plurality of sub-molds are distributed at least along the first direction, and along the first direction, each two adjacent sub-molds are spliced ​​together to form a mold groove; The multiple sub-molds include a first sub-mold, the second cavity is formed by the first sub-molds of the two main molds, and the first sub-mold independently forms at least one mold groove; the multiple sub-molds include a plurality of second sub-molds, the first sub-mold and the plurality of second sub-molds are distributed along a first direction, at least one second sub-mold is arranged on each of the two opposite sides of the first sub-mold along the first direction, the first sub-mold and each adjacent second sub-mold are formed to form a mold groove, and the first cavity is formed by the first sub-molds and the second sub-molds of the two main molds; The mold cavity further includes a third mold cavity, which is located on a side of the second mold cavity away from the first mold cavity and is communicated with the second mold cavity; The plurality of sub-molds further include at least one third sub-mold, the third sub-mold being arranged on one side of the first sub-mold along the second direction, and the third cavity being formed by the third sub-molds of the two main molds; In a projection plane perpendicular to the second direction, the projection of the third sub-mold covers the projection of the first sub-mold and covers at least a portion of the projection of the second sub-mold.

2. The mold according to claim 1, characterized in that: There are multiple third sub-moulds, and the multiple third sub-moulds are distributed along the second direction, and every two adjacent third sub-moulds are jointly arranged to form a molding groove.

3. The mold according to claim 2, characterized in that: In the projection plane perpendicular to the second direction, at least one projection of the second sub-mold and a projection of the third sub-mold are staggered at each of the two opposite ends of the main mold along the first direction.

4. The mold according to claim 3, characterized in that: Along the second direction, at least one of the third sub-molds protrudes from the end surface of each of the second sub-molds.

5. The mold according to any one of claims 1 to 4, characterized in that: Each of the main molds has an abutting surface for abutting against another main mold, and the abutting surface of at least one of the main molds is recessed to form a strip groove, and the strip groove extends along the outer contour of the cavity.

6. The mold according to any one of claims 1 to 4, characterized in that: The mold further comprises: A core mold is detachably disposed between the two main molds, and is used to at least partially fill the cavity inside the pole body.

7. The mold according to any one of claims 1 to 4, characterized in that: The second direction is the direction of gravity, the second cavity is located at the bottom side of the first cavity, and the bottom surfaces of the two main molds form an injection port.

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