A forming mold for an insulator

Abstract

The present invention relates to the technical field of insulator production, and discloses a forming mold for an insulator, which includes an upper mold and a lower mold. An upper injection cavity is formed on the bottom surface of the upper mold, and a lower injection cavity is formed on the top surface of the lower mold. The insulator is correspondingly engaged with the lower injection cavity. Exhaust holes are formed at both front and rear ends of the lower injection cavity. A frame-shaped air groove is formed on the top surface of the lower mold. The exhaust holes are connected to the air groove. Annular grooves are formed on both front and rear sides of the lower injection cavity. An annular ring is engaged in the annular groove. A clamping block is provided at the top end of the annular ring. Clamping grooves are formed at the front and rear of the upper injection cavity, and the positions of the clamping grooves correspond to the positions of the clamping blocks. The inner wall of the annular ring is fitted to the cast iron parts before and after the insulator. The present invention is beneficial to avoiding the influence of gas in the mold cavity on the material flow, and at the same time avoiding the difficulty in mold opening caused by the formation of negative pressure during the reciprocating production process, and is beneficial to cooperating with external devices to pick up the insulator.

Description

Technical Field

[0001] The present invention relates to the technical field of insulator production, and specifically to a forming mold for an insulator. Background Art

[0002] A device installed between conductors at different potentials or between a conductor and a grounding member that can withstand voltage and mechanical stress, there are many types of insulators. Although the structures and shapes of different types of insulators vary greatly, they are all composed of two major parts: an insulating part and connecting fittings. The formation of the insulating part requires the cooperation of a forming mold.

[0003] There is a prior Chinese patent (Publication No.: CN 216465914 U) for an insulator forming mold. When using this insulator forming mold, the molten material is injected into the interior of the insulator forming mold from the inlet of the first module. At this time, the air inside the cavity flows out through the vertical pipe. When the material flows out, it will exert an outward force on the closing rod. At this time, the closing rod starts to move and compresses the first spring. When the pressing rod moves to a certain position, the plug blocks the opening of the first orifice plate to prevent the material from flowing out. At this time, the injection molding can be completed. Then, wait for the material to cool, and at this time, the production of the insulator can be completed. However, when the air flows out, the material will also flow out with the airflow. Although it is blocked, flow marks will still be formed. At the same time, during the process of reciprocating mold opening, it is also a process of continuous temperature rise and fall of the mold. After all the gas is released, the pressure in the inner cavity of the insulator mold decreases to form a negative pressure, which leads to difficult mold opening. At the same time, due to the long length and heavy weight of the insulator, mechanical assistance is required for part taking, and it is difficult to create favorable conditions for part taking in the above-mentioned document.

[0004] Therefore, we provide a forming mold for an insulator, which is beneficial to avoiding the influence of gas in the mold cavity on the material flow, and at the same time avoiding the formation of negative pressure during the reciprocating production process, which leads to difficult mold opening, and is beneficial to cooperating with external devices to take the insulator. Summary of the Invention

[0005] The purpose of the present invention is to provide a forming mold for an insulator, which solves the problems raised in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A forming mold for an insulator, comprising an upper mold and a lower mold. An upper injection cavity is formed on the bottom surface of the upper mold, and a lower injection cavity is formed on the top surface of the lower mold. The insulator is correspondingly engaged with the lower injection cavity. Exhaust holes are formed at the front and rear ends of the lower injection cavity. A frame-shaped air groove is formed on the top surface of the lower mold, and the exhaust holes are connected to the air groove. Ring grooves are formed on the front and rear sides of the lower injection cavity, and a ring is engaged in the ring grooves. A clamping block is provided at the top end of the ring. Clamping grooves are formed at the front and rear of the upper injection cavity, and the positions of the clamping grooves correspond to the positions of the clamping blocks. The inner wall of the ring is fitted with the cast iron parts on the front and rear of the insulator;

[0007] A feed port is installed at the top of the upper mold, and a runner system is connected to the bottom end of the feed port. The bottom end of the runner system is connected to the top of the upper injection cavity through a runner pipe; Cooling pipes are arranged around the upper injection cavity inside the upper mold, and the cooling pipes are connected to the water nozzles at the front end of the upper mold.

[0008] As a preferred embodiment of the present invention, column holes are formed at the four corners of the lower mold, and mold columns are nested at the four corners of the upper mold. The bottom of the mold columns is correspondingly nested in the column holes.

[0009] As a preferred embodiment of the present invention, the position of the upper injection cavity corresponds to the position of the lower injection cavity. An insulator is clamped between the upper injection cavity and the lower injection cavity, and an injection layer is pressed on the outer wall of the insulator.

[0010] As a preferred embodiment of the present invention, a hole body is formed in the middle of the clamping block.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] Through the settings of the exhaust holes, air grooves, ring grooves, rings, clamping blocks and clamping grooves, an external picking device passes through the hole body of the nested clamping block, and then places the cast iron parts of the insulator on the front and rear sides of the lower injection cavity through the ring. When the upper mold and the lower mold are closed, the clamping blocks are correspondingly nested in the clamping grooves, and then the material is injected through the external injection device through the runner system to form an injection layer. When injecting the material, the gas enters the air groove through the exhaust holes, so that the pressure between the upper mold and the lower mold is maintained at a threshold value. The mold is opened by a mold opening device, and then the whole insulator is taken out through the hole body of the corresponding clamping block by the external picking device, which is beneficial to avoiding the influence of the gas in the mold cavity on the material flow, and at the same time avoiding the difficulty of mold opening caused by the formation of negative pressure during the reciprocating production process, and is beneficial to cooperating with the external device to pick up the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:

[0014] Figure 1 Explosion schematic diagram of the overall structure of a forming mold for an insulator according to the present invention;

[0015] Figure 2 Schematic diagram of the insulator structure of a forming mold for an insulator according to the present invention;

[0016] Figure 3 Schematic diagram of the overall internal structure of a forming mold for an insulator according to the present invention;

[0017] Figure 4 Schematic diagram of the upper injection cavity and lower injection cavity structures of a forming mold for an insulator according to the present invention;

[0018] Figure 5 Schematic diagram of the ring structure of a forming mold for an insulator according to the present invention.

[0019] In the figure: 1, lower mold; 2, column hole; 3, upper mold; 4, feed inlet; 5, lower injection cavity; 6, placement groove; 7, exhaust hole; 8, air groove; 9, upper injection cavity; 10, runner tube; 11, runner system; 12, cooling tube; 13, mold column; 14, engaging block; 15, hole body; 16, annular groove; 17, engaging groove; 18, cast iron part; 19, ring; 20, injection compression layer. Detailed implementation manners

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention; in the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Please refer to Figures 1-5, the present invention provides a technical solution: a forming mold for an insulator, including an upper mold 3 and a lower mold 1. An upper injection cavity 9 is opened on the bottom surface of the upper mold 3, and a lower injection cavity 5 is opened on the top surface of the lower mold 1. The insulator is correspondingly engaged with the lower injection cavity 5. Exhaust holes 7 are opened at the front and rear ends of the lower injection cavity 5. A frame-shaped air groove 8 is opened on the top surface of the lower mold 1. The exhaust holes 7 are connected to the air groove 8. Ring grooves 16 are opened on both sides of the front and rear of the lower injection cavity 5. A ring 19 is engaged in the ring grooves 16. A clamping block 14 is provided at the top end of the ring 19. Clamping grooves 17 are opened at the front and rear of the upper injection cavity 9. The position of the clamping grooves 17 corresponds to the position of the clamping block 14. The inner wall of the ring 19 is attached to the cast iron parts 18 on the front and rear of the insulator;

[0023] The external part-taking device passes through the hole body 15 nested with the clamping block 14, and then places the cast iron parts 18 of the insulator into the placement grooves 6 on both sides of the front and rear of the lower injection cavity 5 through the ring 19. When the upper mold 3 and the lower mold 1 are closed, the clamping block 14 is nested corresponding to the clamping groove 17, and then the material is injected through the runner system 11 by an external injection device to form an injection layer 20. When injecting the material, the gas enters the air groove 8 through the exhaust holes 7, so that the pressure between the upper mold 3 and the lower mold 1 is maintained at a threshold value. The mold is opened by an opening device, and the entire insulator is taken out by passing through the hole body 15 corresponding to the clamping block 14 by the external part-taking device.

[0024] In this embodiment, column holes 2 are opened at the four corners of the lower mold 1, and mold columns 13 are nested at the four corners of the upper mold 3. The bottom of the mold columns 13 is nested corresponding to the column holes 2;

[0025] The inner wall of the column hole 2 can be made of a copper ring. The mold columns 13 are nested corresponding to the column holes 2 to complete the closing work between the upper mold 3 and the lower mold 1 of the mold.

[0026] In this embodiment, the position of the upper injection cavity 9 corresponds to the position of the lower injection cavity 5. An insulator is clamped between the upper injection cavity 9 and the lower injection cavity 5. An injection layer 20 is pressed on the outer wall of the insulator;

[0027] Due to the corresponding positions of the upper injection cavity 9 and the lower injection cavity 5, an insulator is clamped between the upper injection cavity 9 and the lower injection cavity 5, and an injection layer 20 is pressed on the outer wall of the insulator. The cast iron parts 18 at both ends of the insulator are not wrapped by the injection layer 20.

[0028] In this embodiment, a feed inlet 4 is installed on the top of the upper mold 3. The bottom end of the feed inlet 4 is connected to a runner system 11. The bottom end of the runner system 11 is connected to the top of the upper injection cavity 9 through a runner pipe 10;

[0029] The external injection device is connected to the feeding port 4. The material is injected through the feeding port 4 by the injection device, and the material is injected into the upper injection cavity 9 and the lower injection cavity 5 from the runner tube 10 through the runner system 11 to form the outer wall of the insulator by injection molding.

[0030] In this embodiment, a cooling pipe 12 is arranged around the upper injection cavity 9 inside the upper mold 3, and the cooling pipe 12 is communicated with the water nozzle at the front end of the upper mold correspondingly;

[0031] The external water circulation machine is communicated with the water nozzle correspondingly. By means of water circulation, the water flow passes through the cooling pipe 12 to cool the material and form the injection molding layer 20.

[0032] In this embodiment, a hole 15 is arranged in the middle of the engaging block 14;

[0033] The arrangement of the hole 15 facilitates the external part-taking structure to pass through and lift the whole insulator through the ring 19.

[0034] In the process of the insulator, after the mandrel is roughened and brushed with the binder, the sheath is made by an extrusion machine, and then it is vulcanized for the second time and bonded with the pre-vulcanized umbrella pieces by room temperature vulcanized silicone rubber in the umbrella-piercing machine. After the end connection fittings and sealing treatment are completed, the process has high production efficiency. Because the export temperature of the domestic extrusion machine is low, the bonding between the mandrel and the sheath mainly depends on the second vulcanization, and the bonding surface between the disk and the sheath is small.

[0035] Or the mandrel is composed of glass fiber and resin. After the fiber is impregnated with resin, it is pulled and heated and cured through a mold to form an integral body. This molding process makes the resin fill around the fiber, and its overall performance mainly depends on the fiber material composition and the performance of the resin.

[0036] When using the molding die of an insulator, it should be noted that the present invention is a molding die of an insulator, including 1. lower mold; 2. column hole; 3. upper mold; 4. feeding port; 5. lower injection cavity; 6. placing groove; 7. exhaust hole; 8. air groove; 9. upper injection cavity; 10. runner tube; 11. runner system; 12. cooling pipe; 13. mold column; 14. engaging block; 15. hole; 16. ring groove; 17. engaging groove; 18. cast iron part; 19. ring; 20. injection molding layer components are all general standard parts or parts known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or by conventional experimental methods.

[0037] In use, the upper mold 3 is fixed by an injection machine, and then the mold opening machine is installed corresponding to the bottom of the lower mold 1. The lower mold 1 is driven by the mold opening machine to move to complete the mold opening or closing action. The external water circulation machine is connected to the corresponding water nozzle. The external workpiece taking device passes through the hole 15 of the engaging block 14 in the nested ring 19, and then places the cast iron part 18 of the insulator corresponding to the placement grooves 6 on the front and rear sides of the lower injection cavity 5 through the ring 19. Then, the upper mold 3 and the lower mold 1 are closed by the mold opening machine, and the engaging block 14 is nested corresponding to the engaging groove 17. Then, the injection device is connected to the corresponding feed port 4. The material is injected through the feed port 4 by the injection device, and the material is injected into the upper injection cavity 9 and the lower injection cavity 5 through the runner system 11 by the runner tube 10 to form an injection layer 20 on the outer wall of the insulator. When injecting the material, the gas enters the gas groove 8 through the exhaust hole 7, so that the pressure between the upper mold 3 and the lower mold 1 remains at the threshold value. The mold is opened by the mold opening machine, and the whole insulator is taken out through the external workpiece taking device passing through the hole 15 of the engaging block 14 in the ring 19.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0039] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A forming mold for an insulator, comprising an upper mold (3) and a lower mold (1). An upper injection cavity (9) is formed on the bottom surface of the upper mold (3), and a lower injection cavity (5) is formed on the top surface of the lower mold (1). The insulator is engaged with the lower injection cavity (5). It is characterized in that: The front and rear ends of the betting cavity (5) are provided with exhaust holes (7). The top surface of the lower die (1) is provided with a frame-shaped air groove (8). The exhaust holes (7) are connected to the air groove (8). The front and rear sides of the betting cavity (5) are provided with annular grooves (16). An annular ring (19) is clamped in the annular groove (16). A clamping block (14) is arranged at the top end of the annular ring (19). Clamping grooves (17) are formed in the front and rear of the upper betting cavity (9). The positions of the clamping grooves (17) correspond to the positions of the clamping blocks (14). The inner wall of the annular ring (19) is fitted with the cast iron parts (18) before and after the insulator; A feed inlet (4) is installed at the top of the upper die (3). The bottom end of the feed inlet (4) is communicated with a runner system (11). The bottom end of the runner system (11) is communicated with the top of the upper betting cavity (9) through a runner pipe (10). Cooling pipes (12) are arranged around the upper betting cavity (9) inside the upper die (3). The cooling pipes (12) are communicated with the water nozzles at the front end of the upper die; A hole body (15) is formed in the middle of the clamping block (14); The arrangement of the hole body (15) facilitates the passing of an external part-taking structure to lift the entire insulator through the annular ring (19).

2. The molding die for an insulator according to claim 1, characterized in that: Column holes (2) are formed at the four corners of the lower die (1). Die columns (13) are nested at the four corners of the upper die (3). The bottom of the die columns (13) is nested corresponding to the column holes (2).

3. The forming mold of an insulator according to claim 1, characterized in that: The position of the upper betting cavity (9) corresponds to the position of the lower betting cavity (5). An insulator is clamped between the upper betting cavity (9) and the lower betting cavity (5). A pressure injection layer (20) is injection-molded on the outer wall of the insulator.

4. The forming die for an insulator according to claim 1, characterized in that: A hole body (15) is formed in the middle of the clamping block (14).

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