Exhaust structure of 750kV cable accessory mold

Abstract

The utility model discloses an exhaust structure of a 750kV cable accessory mold, which belongs to the field of mold structures, and comprises a mold assembly, a first exhaust hood, a second exhaust hood and exhaust equipment, the mold assembly comprises a sleeve and a forming assembly, a cavity for product forming is arranged in the forming assembly, the forming assembly is arranged in the sleeve in a penetrating manner, and the first exhaust hood and the second exhaust hood are arranged on the sleeve. The first air exhaust hood is detachably connected to one end of the sleeve, a first air exhaust hole is formed in the first air exhaust hood, the second air exhaust hood is detachably connected to the other end of the sleeve, a second air exhaust hole is formed in the second air exhaust hood, and the air exhaust equipment is communicated to the first air exhaust hole and the second air exhaust hole through a pipeline. After the die assembly is used for a long time and under the condition that the die assembly is slightly deformed and abraded, the exhaust structure can play a role in sealing and make up for pressure loss in the cavity caused by deformation of the die assembly, and a centralized exhaust channel can be formed, so that gas in the die assembly can be regularly exhausted.

Description

Technical Field

[0001] The utility model relates to the technical field of mold structures, in particular to an exhaust structure of a 750kV cable accessory mold. Background Art

[0002] During the molding process of rubber products, the rubber fills the mold cavity for a very short time. To quickly expel the air inside the cavity and the small molecules of gas volatilized by the rubber, the mold must have good venting capabilities. Poor venting can easily lead to incomplete products, uneven filling, bubbles, or defects such as localized carbonization and scorching of the rubber product. Conventional rubber mold venting is usually selected in the parts where trapped gas is most concentrated or where the materials finally converge. However, due to slight deformation and damage caused by long-term use, the mold's various parting surfaces lose their sealing properties, and the gas in the cavity cannot be smoothly discharged under the effective pressure difference. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a 750kV cable accessory mold exhaust structure that addresses the problem of sealing failure of the mold's parting surfaces due to slight deformation and damage over time, preventing the gas in the mold cavity from being discharged smoothly under an effective pressure difference.

[0004] A 750kV cable accessory mold exhaust structure according to an embodiment of the present invention includes:

[0005] The mold assembly includes a sleeve and a molding assembly, wherein the molding assembly has a cavity for molding the product, and the molding assembly is inserted into the sleeve;

[0006] a first exhaust hood detachably connected to one end of the sleeve, wherein the first exhaust hood is provided with a first exhaust hole;

[0007] a second exhaust hood detachably connected to the other end of the sleeve, wherein the second exhaust hood is provided with a second exhaust hole;

[0008] The air extraction device is connected to the first air extraction hole and the second air extraction hole through a pipeline.

[0009] A 750kV cable accessory mold exhaust structure according to an embodiment of the present invention has at least the following beneficial effects:

[0010] A first and second exhaust hood are connected to each end of the sleeve. This exhaust device extracts air from the chamber, allowing for continuous exhaust throughout the entire injection process. This creates a continuous pressure differential within the mold assembly, facilitating the regular discharge of gas from the mold assembly. If the mold assembly exhibits slight deformation and wear over an extended period of use, the exhaust structure not only seals the cavity and compensates for pressure loss caused by deformation, but also creates a centralized exhaust channel to vent air from within the mold assembly.

[0011] According to some embodiments of the present invention, a first sealing groove is provided on the first vacuum hood, a first sealing ring is provided in the first sealing groove, and the first sealing ring abuts the sleeve; a second sealing groove is provided on the second vacuum hood, a second sealing ring is provided in the second sealing groove, and the second sealing ring abuts the sleeve.

[0012] According to some embodiments of the present invention, a first connecting hole for a first screw to pass through is provided on the first exhaust hood, a first threaded hole is provided at one end of the sleeve, and the first screw is threadedly connected to the first threaded hole, and a second connecting hole for a second screw to pass through is provided on the second exhaust hood, a second threaded hole is provided at the other end of the sleeve, and the second screw is threadedly connected to the second threaded hole.

[0013] According to some embodiments of the present invention, a first exhaust nozzle is connected to the first exhaust hood, and the first exhaust nozzle is connected to the first exhaust hole. A second exhaust nozzle is connected to the second exhaust hood, and the second exhaust nozzle is connected to the second exhaust hole. The first exhaust nozzle and the second exhaust nozzle are connected to the exhaust equipment through a pipe.

[0014] According to some embodiments of the present invention, the molding assembly includes two half cavities, two mold sleeves and a mold core, the two mold sleeves are mounted on the mold core, the two mold sleeves are spaced apart, the mold core is passed through the two half cavities, the two mold sleeves are located between the two half cavities, and the two half cavities, the two mold sleeves and the mold core enclose a space to form the chamber.

[0015] According to some embodiments of the present invention, a first exhaust channel and a second exhaust channel are provided in the half mold cavity, one end of the first exhaust channel penetrates to the contact surface between the half mold cavity and the mold sleeve close to the first exhaust hood, the other end of the first exhaust channel penetrates to the end of the half mold cavity close to the first exhaust hood, one end of the second exhaust channel penetrates to the contact surface between the half mold cavity and the mold sleeve close to the second exhaust hood, and the other end of the second exhaust channel penetrates to the end of the half mold cavity close to the second exhaust hood.

[0016] According to some embodiments of the present invention, a cavity groove is provided in the half cavity, two limiting grooves are provided in the cavity groove at intervals, and the two mold sleeves are clamped in the limiting grooves.

[0017] According to some embodiments of the present invention, the mold core includes a molding section and two connecting sections, the two connecting sections are connected to both ends of the molding section, the diameter of the molding section is larger than the diameter of the two connecting sections, and the two mold sleeves are respectively mounted on the two connecting sections.

[0018] According to some embodiments of the present invention, the inner side wall of the sleeve is conical, and the outer surface of the molding component is conical.

[0019] According to some embodiments of the present invention, a first flow channel is provided on the sleeve, and a second flow channel connected to the cavity is provided on the molding assembly, and the first flow channel is connected to the second flow channel.

[0020] Additional aspects and advantages of the present invention will be described in part in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the exhaust structure of the 750kV cable accessory mold according to the embodiment of the utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the exhaust structure of the 750kV cable accessory mold according to the embodiment of the utility model. Figure 2 ;

[0024] Figure 3 This is a structural schematic diagram of the first exhaust hood of the exhaust structure of the 750kV cable accessory mold according to an embodiment of the present utility model;

[0025] Figure 4 This is a structural schematic diagram of the second exhaust hood of the exhaust structure of the 750kV cable accessory mold according to an embodiment of the present utility model;

[0026] Figure 5 This is a structural schematic diagram of the Hough cavity of the exhaust structure of the 750kV cable accessories mold according to an embodiment of the present utility model.

[0027] Figure Number:

[0028] 100, mold assembly; 110, sleeve; 111, first flow channel; 120, molding assembly; 121, chamber; 122, half cavity; 1221, cavity groove; 1222, stop groove; 1223, second flow channel; 123, mold sleeve; 124, mold core; 1241, molding section; 1242, connecting section; 125, first exhaust channel; 126, second exhaust channel;

[0029] 200, first exhaust hood; 210, first exhaust hole; 211, first exhaust nozzle; 220, first sealing groove; 221, first sealing ring; 230, first connecting hole; 231, first screw;

[0030] 300, second exhaust hood; 310, second exhaust hole; 311, second exhaust nozzle; 320, second sealing groove; 321, second sealing ring; 330, second connecting hole; 331, second screw;

[0031] 400. Products. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] See also Figure 1 、 Figure 2 and Figure 3 The embodiment of the present invention provides a 750kV cable accessory mold exhaust structure, comprising a mold assembly 100, a first exhaust hood 200, a second exhaust hood 300, and an exhaust device. The mold assembly 100 comprises a sleeve 110 and a molding assembly 120. The molding assembly 120 comprises a chamber 121 for molding a product 400, and the molding assembly 120 is inserted into the sleeve 110. The first exhaust hood 200 is detachably connected to one end of the sleeve 110, and a first exhaust hole 210 is provided on the first exhaust hood 200. The second exhaust hood 300 is detachably connected to the other end of the sleeve 110, and a second exhaust hole 310 is provided on the second exhaust hood 300. The exhaust device is connected to the first exhaust hole 210 and the second exhaust hole 310 through a pipeline. The exhaust device is a vacuum pump, which is connected to the first exhaust hood 200 and the second exhaust hood 300 through an exhaust pipe.

[0036] A first exhaust hood 200 and a second exhaust hood 300 are connected to both ends of the sleeve 110, respectively. The air in the chamber 121 is extracted through the exhaust equipment. The exhaust action can be carried out throughout the entire material injection process, and a pressure difference can be continuously formed inside the mold assembly 100, which helps to regularly discharge the gas in the mold assembly 100. After the mold assembly 100 has been used for a long period of time, if the mold assembly 100 is slightly deformed or worn, the exhaust structure can not only play a sealing role to compensate for the pressure loss in the cavity caused by the deformation of the mold assembly 100, but also form a centralized exhaust channel to exhaust the interior of the mold assembly 100.

[0037] In some embodiments, see Figure 1 、 Figure 3 and Figure 4The first exhaust hood 200 is provided with a first sealing groove 220, in which a first sealing ring 221 is disposed. The first sealing ring 221 abuts against the sleeve 110. The second exhaust hood 300 is provided with a second sealing groove 320, in which a second sealing ring 321 is disposed. The second sealing ring 321 abuts against the sleeve 110. The first sealing ring 221 ensures airtightness between the first exhaust hood 200 and the sleeve 110, and the second sealing ring 321 ensures airtightness between the second exhaust hood 300 and the sleeve 110.

[0038] In some embodiments, see Figure 1 、 Figure 3 and Figure 4 The first exhaust hood 200 is provided with a first connection hole 230. One end of the sleeve 110 is provided with a first threaded hole. A first screw 231 passes through the first connection hole 230 and is threadedly connected to the first threaded hole. The second exhaust hood 300 is provided with a second connection hole 330. The other end of the sleeve 110 is provided with a second threaded hole. A second screw 331 passes through the second connection hole 330 and is threadedly connected to the second threaded hole. The first and second exhaust hoods 200 and 300 are connected to the sleeve 110 via screws, making them easy to assemble and disassemble.

[0039] In some embodiments, see Figure 1 、 Figure 3 and Figure 4 The first exhaust hood 200 is connected to a first exhaust nozzle 211, which is connected to the first exhaust hole 210. The second exhaust hood 300 is connected to a second exhaust nozzle 311, which is connected to the second exhaust hole 310. The first and second exhaust nozzles 211, 311 are connected to the exhaust equipment via pipes. The first exhaust nozzle 211 facilitates the connection of the exhaust pipe to the first exhaust hood 200, and the second exhaust nozzle 311 facilitates the connection of the exhaust pipe to the second exhaust hood 300.

[0040] In some embodiments, see Figure 1 and Figure 5 The molding assembly 120 includes two half cavities 122, two mold sleeves 123, and a mold core 124. The two mold sleeves 123 are mounted on the mold core 124, and the two mold sleeves 123 are spaced apart. The mold core 124 is inserted between the two half cavities 122, and the two mold sleeves 123 are located between the two half cavities 122. The two half cavities 122, the two mold sleeves 123, and the mold core 124 enclose a space to form the chamber 121. The overall structure is relatively compact, and the molding assembly 120 is easy to assemble and disassemble.

[0041] In some embodiments, see Figure 1 and Figure 5A first exhaust channel 125 and a second exhaust channel 126 are provided in the half cavity 122. One end of the first exhaust channel 125 extends through the contact surface between the half cavity 122 and the mold sleeve 123 near the first exhaust hood 200, and the other end of the first exhaust channel 125 extends through the end of the half cavity 122 near the first exhaust hood 200. One end of the second exhaust channel 126 extends through the contact surface between the half cavity 122 and the mold sleeve 123 near the second exhaust hood 300, and the other end of the second exhaust channel 126 extends through the end of the half cavity 122 near the second exhaust hood 300. There is a fitting gap between the half cavity 122 and the mold sleeve 123. When the exhaust equipment is in operation, it extracts air from the gap between the half cavity 122 and the mold sleeve 123 through the first exhaust channel 125 and the second exhaust channel 126, which helps to regularly discharge gas from the mold cavity.

[0042] In some embodiments, see Figure 1 and Figure 5 The cavity 122 is provided with a cavity groove 1221, and two limiting grooves 1222 are provided in the cavity groove 1221. The two mold sleeves 123 are inserted into the limiting grooves 1222. The two limiting grooves 1222 can limit the position of the two mold sleeves 123 to ensure the smooth molding of the product 400.

[0043] In some embodiments, see Figure 1 and Figure 5 The mold core 124 includes a forming section 1241 and two connecting sections 1242. The two connecting sections 1242 are connected to both ends of the forming section 1241. The diameter of the forming section 1241 is larger than the diameters of the two connecting sections 1242. The two mold sleeves 123 are respectively mounted on the two connecting sections 1242. The forming section 1241 and the connecting section 1242 are arranged in a stepped manner at the connection between the connecting section 1242 and the forming section 1241, which can position the mold sleeve 123 and facilitate the rapid disassembly and assembly of the mold sleeve 123, the mold core 124, and the half cavity 122.

[0044] In some embodiments, see Figure 1 and Figure 5 The inner side wall of the sleeve 110 is tapered, and the outer surface of the molding assembly 120 is tapered. After the molding assembly 120 is inserted into the sleeve 110, the sleeve 110 can clamp the molding assembly 120 to ensure that the product 400 is smoothly molded.

[0045] In some embodiments, see Figure 1 、 Figure 2 and Figure 5The sleeve 110 is provided with a first flow channel 111, and the molding assembly 120 is provided with a second flow channel 1223 communicating with the cavity 121. The first flow channel 111 is communicated with the second flow channel 1223. The first flow channel 111 and the second flow channel 1223 are provided to facilitate the flow of the rubber material into the cavity 121.

[0046] The working principle of the 750kV cable accessory mold exhaust structure of this utility model:

[0047] Before injecting the rubber material, the vacuum equipment is activated to evacuate the air from chamber 121, creating a vacuum within chamber 121. Injection begins when the vacuum reaches -0.1 MPa. The rubber material flows through the injection molding machine under high pressure and high temperature, along the first flow channel 111 and the second flow channel 1223, into chamber 121. Although the cavity is now vacuumed, bubbles will still form during the material flow due to the stacking and rolling of the material. As the vacuum equipment continues to operate, a pressure differential channel will form within chamber 121, and the gas in chamber 121 will be discharged outward along this channel until the entire chamber 121 is filled with material.

[0048] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A 750kV cable accessory mold exhaust structure, characterized in that: include: The mold assembly includes a sleeve and a molding assembly, wherein the molding assembly has a cavity for molding the product, and the molding assembly is inserted into the sleeve; a first exhaust hood detachably connected to one end of the sleeve, wherein the first exhaust hood is provided with a first exhaust hole; a second exhaust hood detachably connected to the other end of the sleeve, wherein the second exhaust hood is provided with a second exhaust hole; The air extraction device is connected to the first air extraction hole and the second air extraction hole through a pipeline.

2. A 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The first vacuum hood is provided with a first sealing groove, a first sealing ring is provided in the first sealing groove, and the first sealing ring abuts the sleeve; the second vacuum hood is provided with a second sealing groove, a second sealing ring is provided in the second sealing groove, and the second sealing ring abuts the sleeve.

3. A 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The first exhaust hood is provided with a first connecting hole for a first screw to pass through, one end of the sleeve is provided with a first threaded hole, and the first screw is threadedly connected to the first threaded hole, and the second exhaust hood is provided with a second connecting hole for a second screw to pass through, the other end of the sleeve is provided with a second threaded hole, and the second screw is threadedly connected to the second threaded hole.

4. A 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The first exhaust hood is connected to a first exhaust nozzle, which is connected to the first exhaust hole. The second exhaust hood is connected to a second exhaust nozzle, which is connected to the second exhaust hole. The first exhaust nozzle and the second exhaust nozzle are connected to the exhaust equipment through a pipe.

5. The 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The molding assembly includes two half cavities, two mold sleeves and a mold core. The two mold sleeves are mounted on the mold core, and the two mold sleeves are spaced apart. The mold core is passed through the two half cavities. The two mold sleeves are located between the two half cavities. The two half cavities, the two mold sleeves and the mold core enclose a space to form the chamber.

6. A 750kV cable accessory mold exhaust structure according to claim 5, characterized in that: A first exhaust channel and a second exhaust channel are provided in the Hough mold cavity, one end of the first exhaust channel penetrates to the contact surface between the Hough mold cavity and the mold sleeve close to the first exhaust hood, the other end of the first exhaust channel penetrates to the end of the Hough mold cavity close to the first exhaust hood, one end of the second exhaust channel penetrates to the contact surface between the Hough mold cavity and the mold sleeve close to the second exhaust hood, the other end of the second exhaust channel penetrates to the end of the Hough mold cavity close to the second exhaust hood.

7. The 750kV cable accessory mold exhaust structure according to claim 5, characterized in that: A cavity groove is provided in the half cavity, and two limiting grooves are provided in the cavity groove at intervals, and the two mold sleeves are clamped in the limiting grooves.

8. The 750kV cable accessory mold exhaust structure according to claim 7, characterized in that: The mold core includes a molding section and two connecting sections, the two connecting sections are connected to both ends of the molding section, the diameter of the molding section is larger than the diameters of the two connecting sections, and the two mold sleeves are respectively mounted on the two connecting sections.

9. The 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The inner side wall of the sleeve is tapered, and the outer surface of the forming component is tapered.

10. The 750kV cable accessory mold exhaust structure according to claim 1, characterized in that: The sleeve is provided with a first flow channel, and the molding assembly is provided with a second flow channel communicating with the cavity, and the first flow channel is communicated with the second flow channel.

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