Novel mixed insulation pillar forming die

Abstract

The utility model relates to the technical field of insulation pillar production, in particular to a novel mixed insulation pillar forming die which comprises an upper die and a lower die which are spliced with each other, a containing cavity used for containing a core body is formed between the upper die and the lower die, the upper die is provided with a glue injection channel communicated with the containing cavity, and a wedge-shaped block is arranged at the bottom of the upper die. A sliding block is arranged at the top of the lower die in a sliding mode and used for positioning the core body, and the wedge-shaped block extrudes the sliding block to move so as to remove positioning of the core body. According to the utility model, the contact surface of the upper die cavity and the lower die cavity is provided with the positioning assembly of the core body, the positioning assembly is used for positioning the core body placed in the accommodating cavity, and the size tolerance of the positioning assembly to an insulating pillar is within 5mm; the process stability of the core body with larger size and form and location tolerance in the mold coating forming process can be ensured, a qualified mixed insulation support column product is produced, and the production process requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of the production of insulating columns, in particular to a forming die for a new type of hybrid insulating column. Background Art

[0002] The new type of hybrid post insulator is a new type of power insulator made by combining silicone rubber material and ceramic material. By fully integrating the advantages of the two materials, it has good insulation performance, anti-pollution property, weather resistance, light weight and impact resistance, and is suitable for various power transmission and distribution systems. The production of the hybrid insulating column is usually carried out by the method of die injection molding. The injection molding die is not only the basis of the molding process, but also one of the decisive factors for realizing high-quality and high-efficiency production. Its design and manufacturing level directly affect the success or failure and efficiency of the entire injection molding process.

[0003] During the batch production of traditional post insulators, due to factors such as kaolin materials, production processes, and the operation level of workers, the post insulator products produced by manufacturers all have problems such as large dimensional deviations and unstable shapes. Even for the products of the same batch produced by automated production, the dimensional stability of the products cannot be guaranteed, and the dimensional deviation can reach more than 5 mm. In the production of the new type of hybrid post insulator, the above problems have added great difficulties to the positioning of the core in the die cavity. Since the materials for producing post insulators are mainly ceramics or glass at present, the common feature of these materials is that they are brittle and hard, and due to their large dimensional deviations, they are easily crushed and damaged during mold closing or molding, and finally it is difficult to form. At present, in dealing with the problems of the positioning and molding of the core in the die cavity, there are great problems in the design technology of the existing die, and it is urgent to achieve a technological breakthrough in the tolerance of the core positioning and the core size of the die.

[0004] Therefore, the utility model proposes a forming die for a new type of hybrid insulating column to solve this problem. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a forming die for a new type of hybrid insulating column to improve the problems existing in the prior art.

[0006] A forming die for a new type of hybrid insulating column includes an upper die and a lower die that are assembled together, and a receiving cavity for receiving a core is formed between the upper die and the lower die. The upper die is provided with a glue injection channel that communicates with the receiving cavity. A wedge block is arranged at the bottom of the upper die, and a slider is slidably arranged on the top of the lower die. The slider is used to position the core, and the wedge block squeezes the slider to move to release the positioning of the core, so as to vacate the position for encapsulation.

[0007] More preferably, the upper mold includes an upper mold cavity and an upper mold base plate, and the upper mold base plate is arranged at the top of the upper mold cavity; the lower mold includes a lower mold cavity and a lower mold base plate, and the lower mold base plate is arranged at the bottom of the lower mold cavity.

[0008] More preferably, the glue injection channel includes a first feed port and a second feed port. A first feed port communicating with the core accommodating cavity is opened at the top of the upper mold cavity, and a second feed port communicating with the first feed port is opened on the upper mold base plate.

[0009] More preferably, a limiting block is arranged on the side of the lower mold cavity, and a spring is connected between the limiting block and the sliding block.

[0010] More preferably, a detachable positioning block is installed in the upper mold cavity. A discharge port is opened in the middle of the positioning block, and the positioning block communicates with the first feed port.

[0011] More preferably, the glue injection channel further includes a main runner tube and a sub-runner tube. The bottom end of the first feed port is communicated with the main runner tube, and the main runner tube is communicated with three parallel sub-runner tubes.

[0012] More preferably, the first feed port is directly above the center point of the main runner tube, and the width of the sub-runner tubes on both sides is greater than that of the sub-runner tube in the middle position.

[0013] More preferably, a surrounding overflow groove is arranged at the edge of the contact surface between the upper mold cavity and the lower mold cavity, and the overflow groove communicates with the accommodating cavity.

[0014] More preferably, both the upper mold cavity and the lower mold cavity are provided with exhaust grooves. The exhaust grooves communicate with the accommodating cavity, and the exhaust grooves are communicated with exhaust wells.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. In the utility model, a sliding block and a wedge block are arranged on the contact surface between the upper mold cavity and the lower mold cavity. The core is positioned by the sliding block and the wedge block, and the dimensional tolerance of the insulating pillar is within 5 mm, which can ensure the process stability during the die coating molding process of the core with large dimensions and shape and position tolerances, and produce qualified mixed insulating pillar products to meet the production process requirements;

[0017] 2. The utility model pre-connects adjacent cavity plates with pins and integrally locks the spliced cavity plates by combining the close fit of screws and nuts. This connection and locking method has flexibility and versatility and can be widely applied to various types of split-type core accommodating cavities;

[0018] 3. The first feed inlet is located directly above the center point of the main runner pipe. The two side runner pipes are wide, and the middle runner pipe is narrow, which can enable the rubber materials flowing through the three runner pipes to enter the core accommodation cavity simultaneously, making the stress distribution of the porcelain insulator core located in the core accommodation cavity uniform, effectively avoiding size deviation and internal defects caused by uneven stress, and improving the molding quality and stability of the hybrid insulating post. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0020] Figure 2 It is an exploded structural diagram of the present utility model.

[0021] Figure 3 It is a structural schematic diagram of components such as the overflow groove and exhaust groove of the present utility model.

[0022] Figure 4 It is a structural schematic diagram of the core positioning assembly of the present utility model.

[0023] Reference numerals: 1. Upper mold cavity; 11. Upper mold base plate; 2. Lower mold cavity; 21. Lower mold base plate; 3. First feed inlet; 31. Positioning block; 4. Second feed inlet; 5. Wedge block; 51. Slide block; 52. Limit block; 53. Spring; 6. Cavity plate; 7. Main runner pipe; 71. Runner pipe; 8. Overflow groove; 9. Exhaust groove; 10. Exhaust well. SPECIFIC EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art in the field to which the present utility model belongs. The words such as "including" used herein mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0025] The embodiments of the present utility model provide a new type of hybrid insulating post molding die, as Figures 1-4As shown in the figure, it includes an upper mold cavity 1 and a lower mold cavity 2. The top of the upper mold cavity 1 is connected to an upper mold base plate 11 by bolts, and the bottom of the lower mold cavity 2 is connected to a lower mold base plate 21 by bolts. An accommodation cavity for accommodating the core is formed between the upper mold cavity 1 and the lower mold cavity 2. A first feed port 3 communicating with the accommodation cavity is opened at the top of the upper mold cavity 1. A detachable positioning block 31 is installed in the upper mold cavity 1. The positioning block 31 communicates with the first feed port 3. A discharge port is opened in the middle of the positioning block 31. By disassembling the positioning block 31, it is prevented that the material blocks the first feed port 3. A second feed port 4 communicating with the first feed port 3 is opened on the upper mold base plate 11. The material enters the first feed port 3 from the second feed port 4 and then enters the accommodation cavity from the positioning block 31. A core positioning assembly for positioning the core is arranged on the contact surface between the upper mold cavity 1 and the lower mold cavity 2.

[0026] In some embodiments, the core positioning assembly includes a wedge block 5, a slider 51, a limit block 52 and a spring 53. The wedge block 5 is arranged at the bottom of the upper mold cavity 1. The slider 51 is slidably connected to the top of the lower mold cavity 2. The limit block 52 is fixedly connected to the side of the lower mold cavity 2. A spring 53 is connected between the limit block 52 and the slider 51. One end of the slider 51 away from the spring 53 is a cylindrical end. Positioning grooves are arranged on both sides of the lower mold cavity 2 for positioning the two ends of the core. This positioning assembly simplifies the positioning operation of the porcelain insulator core, ensures accurate positioning of the core, and has a dimensional tolerance of within 5 mm for the insulating post, ensuring the reliability of the formation of the insulating post.

[0027] Specifically, before the mold is closed, on the contact surface between the upper mold cavity 1 and the lower mold cavity 2, an insulator core positioning mechanism is arranged, and the spring 53 therein is in a pre-compressed state. The slider 51 is jointly affected by the limit block 52 installed on the side of the lower mold cavity 2 and the spring 53. The cylindrical end of the slider 51 extends into the interior of the core accommodation cavity. The porcelain insulator core is placed in the core accommodation cavity, and the straight wall of the first umbrella surface thereof is close to the cylindrical surface of the head of the slider 51. At the same time, the cylindrical heads at both ends of the porcelain insulator core are matched with the positioning grooves to complete the positioning operation. When the mold is closed, the lower mold cavity 2 moves axially closer to the upper mold cavity 1. Under the action of the closing force, the wedge block 5 and the slider 51 in the positioning mechanism cooperate with each other, and the spring 53 is compressed laterally. At this time, the longitudinal movement of the wedge block 5 is converted into the lateral movement of the slider 51, and the slider 51 slides out of the insulator core accommodation cavity to vacate the glue position.

[0028] In some embodiments, the upper mold cavity 1 and the lower mold cavity 2 are both formed by splicing multiple cavity plates 6. Each cavity plate 6 is provided with symmetrically distributed pin holes. The adjacent cavity plates 6 are preliminarily positioned and cooperated by using the pin connection method, and then the cavity plates 6 are locked and fixed by the cooperation of screws and nuts to form the upper mold cavity 1 and the lower mold cavity 2 respectively. Moreover, the upper mold cavity 1 and the upper mold base plate 11, and the lower mold cavity 2 and the lower mold base plate 21 are also fixedly connected by bolts. This method effectively simplifies the processing and manufacturing process of the core accommodating cavity, and can also reduce the difficulties for subsequent mold repair operations. And this positioning and connection locking method can be widely used in various types of split core accommodating cavities.

[0029] In some embodiments, the bottom end of the first feed inlet 3 is connected to a main runner tube 7, and the main runner tube 7 is connected to three sub-runner tubes 71. The widths of the two side sub-runner tubes 71 are greater than that of the middle sub-runner tube 71. The first feed inlet 3 is directly above the center point of the main runner tube 7. This gating method can ensure that the rubber material is injected into the core accommodating cavity through the three sub-runner tubes 71 synchronously, so that the porcelain insulator core placed therein bears uniform pressure, effectively avoiding dimensional deviations and internal defects caused by uneven force distribution, which is beneficial to improving the molding quality of the hybrid insulating post.

[0030] In some embodiments, a circumferential overflow groove 8 is provided at the edge of the contact surface between the upper mold cavity 1 and the lower mold cavity 2. This is beneficial to ensuring an appropriate amount of rubber material filling in the core accommodating cavity, and helps to exhaust air, prevent defects, helps to improve the appearance of the hybrid insulating post, and ensure the accurate quality of the molded hybrid insulating post.

[0031] In some embodiments, both the upper mold cavity 1 and the lower mold cavity 2 are provided with exhaust grooves 9. The exhaust grooves 9 are communicated with the core accommodating cavity, and the exhaust grooves 9 are communicated with exhaust wells 10. This helps to discharge the gas inside the core accommodating cavity, thereby reducing the formation of air bubbles and improving the phenomenon of trapped air during the mold injection process;

[0032] Specifically, after the mold is closed, the upper mold cavity 1 and the lower mold cavity 2 are fitted to each other. After locking the two ends of the porcelain insulator core in the core accommodating cavity, the mold starts to inject the rubber material. The rubber material enters the main runner tube 7 through the first feed inlet 3 and the second feed inlet 4 at the same time, and then flows through the three sub-runner tubes 71. Among the three sub-runner tubes 71, the two side sub-runner tubes 71 are wide and the middle sub-runner tube 71 is narrow. The rubber material flowing through the three sub-runner tubes 71 enters the core accommodating cavity at the same time, so that the porcelain insulator core placed therein is evenly stressed. After the rubber material is filled smoothly, vulcanization is carried out. The excess rubber material during filling overflows from the overflow groove 8, and the gas in the core accommodating cavity is discharged from the exhaust grooves 9 and the exhaust wells 10. Finally, a hybrid insulating post with small dimensional deviation, high precision and few defects is obtained.

[0033] Although the embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are all within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein can have other embodiments and can be implemented or realized in various ways.

Claims

1. A new type of hybrid insulation pillar forming mold, characterized in that: The invention comprises an upper die and a lower die which are assembled with each other, and a receiving cavity for receiving a core body is formed between the upper die and the lower die, and a glue injection channel which is interconnected with the receiving cavity is provided in the upper die, a wedge block (5) is arranged at the bottom of the upper die, and a slider (51) is slidably arranged at the top of the lower die, and the slider (51) is used to position the core body, and the wedge block (5) presses the slider (51) to move and release the positioning of the core body.

2. A new hybrid insulating pillar forming mold according to claim 1, characterized in that: A limit block (52) is arranged on the side of the lower mold cavity (2), and a spring (53) is connected between the limit block (52) and the slider (51).

3. A new hybrid insulating pillar forming mold according to claim 1, characterized in that: The upper mold comprises an upper mold cavity (1) and an upper mold base plate (11), and the upper mold base plate (11) is arranged at the top of the upper mold cavity (1); the lower mold comprises a lower mold cavity (2) and a lower mold base plate (21), and the lower mold base plate (21) is arranged at the bottom of the lower mold cavity (2).

4. A new hybrid insulating pillar forming mold according to claim 3, characterized in that: The glue injection channel comprises a first feed port (3) and a second feed port (4); the top of the upper mold cavity (1) is provided with a first feed port (3) connected to the core body accommodating cavity; the upper mold base plate (11) is provided with a second feed port (4) connected to the first feed port (3).

5. A new hybrid insulating pillar forming die according to claim 4, characterized in that: A detachable positioning block (31) is installed in the upper mold cavity (1), a discharge port is provided in the middle of the positioning block (31), and the positioning block (31) is communicated with the first feed port (3).

6. A new hybrid insulating pillar forming die according to claim 4, characterized in that: The glue injection channel also includes a main flow channel tube (7) and a branch flow channel tube (71); the bottom end of the first feed port (3) is connected to the main flow channel tube (7), and the main flow channel tube (7) is connected to three parallel distributed branch flow channel tubes (71).

7. A new hybrid insulating pillar forming die according to claim 6, characterized in that: The first feed port (3) is located directly above the center point of the main flow channel tube (7), and the branch flow channel tubes (71) located on both sides are wider than the branch flow channel tube (71) located in the middle.

8. A new hybrid insulating pillar forming die according to claim 3, characterized in that: A circumferential glue overflow groove (8) is provided at the edge of the contact surface between the upper mold cavity (1) and the lower mold cavity (2), and the glue overflow groove (8) is communicated with the accommodating cavity.

9. A new hybrid insulating pillar forming die according to claim 3, characterized in that: The upper mold cavity (1) and the lower mold cavity (2) are both provided with an exhaust groove (9), the exhaust groove (9) is connected with the accommodating cavity, and the exhaust groove (9) is connected with an exhaust well (10).

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