Pot-type insulator pouring mold and sample preparation method

Abstract

This invention discloses a casting mold and sample preparation method for a basin-type insulator. The casting mold includes an upper mold, a middle mold, a lower mold, and a demolding rod. The lower mold and the middle mold enclose a casting area. A first protrusion is provided on the side of the lower mold near the middle mold. A metal part is placed within the casting area. The first protrusion is inserted into the central hole of the metal part. The middle mold has a first through hole. The upper mold has a second protrusion. When the upper mold, middle mold, and lower mold are connected, the second protrusion is inserted into the first through hole. The end face of the second protrusion abuts against the metal part, and the periphery of the second protrusion fits against the wall of the first through hole. The demolding rod can be inserted into the first through hole and push the metal part to separate the cast basin-type insulator from the middle mold. By setting up an upper mold, middle mold, and lower mold, the casting part does not contact the upper mold, so the separation of the upper mold and the middle mold is less difficult. After separating the upper mold and the middle mold, the demolding rod is used to push the basin-type insulator, which can reduce the difficulty of demolding.

Description

Technical Field

[0001] This invention relates to the field of pot-type insulator casting technology, and more particularly to a pot-type insulator casting mold and a method for preparing the pot-type insulator casting mold. Background Technology

[0002] With the widespread application of basin insulators in power systems, the demand for performance research has increased. Experimental research often requires casting scaled-down samples of basin insulators for performance testing. Basin insulators are generally composed of insulating components and metal inserts glued together or mechanically clamped together. The insulating components are mostly made of ceramics, epoxy resin, etc., while the metal inserts are mostly iron caps, flanges, etc.

[0003] With the development of mold manufacturing technology, molds are often designed as concave and convex molds. A mixture of epoxy resin, filler, and curing agent is poured into the mold, and after curing and demolding, the insulating parts and metal inserts are integrally formed, resulting in high production efficiency. After casting a scaled-down sample of a basin insulator using a mold, the sample needs to be removed from the mold. The sample preparation method has a significant impact on the quality of the scaled-down sample. In existing technologies, a manual demolding method is often used. The operator holds the concave and convex molds separately and pulls them with the help of a pry bar to separate the concave and convex molds. During the separation of the concave and convex molds, a hammer is often used to strike the mold to speed up the demolding process. However, the existing mold-separation method has the following shortcomings: 1. Mold separation is manually controlled, which can easily damage the metal inserts in the scaled-down sample of the basin insulator; 2. After the epoxy resin is cured, the concave and convex molds are tightly bonded, making the mold separation process time-consuming and labor-intensive, resulting in low production efficiency; 3. Using a hammer to strike the mold during the mold separation process will affect the subsequent accuracy of the mold and the quality of the scaled-down sample of the basin insulator. Summary of the Invention

[0004] The purpose of this invention is to provide a casting mold and sample preparation method for a basin-type insulator, which has a simple structure, is easy to demold, and produces basin-type insulators of good quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, a casting mold for a pot-type insulator is provided for casting pot-type insulators. The pot-type insulator includes a metal part and a casting part. The casting mold includes an upper mold, a middle mold, a lower mold, and a demolding rod. The upper mold, the middle mold, and the lower mold are stacked sequentially and are detachably connected. The lower mold and the middle mold enclose a casting area for casting the casting part. The middle mold has a pouring port, and the casting area communicates with the external environment through the pouring port. The lower mold protrudes from one side near the middle mold. The metal part is disposed within the casting area and has a first protrusion. The first protrusion is inserted into the central hole of the metal part. The middle mold has a first through hole, and the upper mold has a second protrusion. When the upper mold, the middle mold, and the lower mold are connected, the second protrusion is inserted into the first through hole. The end face of the second protrusion abuts against the metal part, and the periphery of the second protrusion fits against the hole wall of the first through hole. When the upper mold and the middle mold are separated, the demolding rod can be inserted into the first through hole and push the metal part to separate the cast basin insulator from the middle mold.

[0007] As a preferred embodiment of the casting mold for a basin-type insulator, the middle mold has a gas channel on one side near the upper mold. The gas channel is connected to the casting area and is used to ventilate the casting area so that the casting part in the casting area is separated from the middle mold. The upper mold is provided with a sealing block, which blocks the gas channel when the upper mold and the middle mold are connected.

[0008] As a preferred embodiment of the casting mold for the basin-type insulator, it further includes a gas injection assembly, which includes a mounting plate and a piston rod. The mounting plate is provided with a piston hole, and the piston rod is disposed in the piston hole. The mounting plate and the intermediate mold are sealed together, and the piston hole communicates with the gas channel. When the piston rod moves toward the intermediate mold, the gas in the piston hole is injected into the gas channel.

[0009] As a preferred embodiment of the casting mold for a basin-type insulator, the surface of the intermediate mold is recessed with a positioning groove, the gas channel penetrates the bottom of the positioning groove, the mounting plate is provided with a positioning protrusion, the piston hole penetrates the positioning protrusion, the positioning protrusion is inserted into the positioning groove, and a sealing ring is clamped between the end face of the positioning protrusion and the bottom of the positioning groove.

[0010] As a preferred embodiment of the casting mold for a basin-type insulator, the mounting plate is provided with a guide hole, which communicates with the first through hole, and the demolding rod is inserted into the guide hole.

[0011] As a preferred embodiment of the casting mold for a basin-type insulator, the mounting plate is provided with a plurality of piston holes, all of which are distributed in a ring around the axis of the first through hole. A piston rod is provided for each piston hole. The air injection assembly also includes a first pressure plate, which is connected to all the piston rods. A clearance hole is provided at the center of the first pressure plate, and the demolding rod passes through the clearance hole.

[0012] As a preferred embodiment of the casting mold for a basin-type insulator, the mounting plate is provided with a plurality of piston holes, all of which are distributed in a ring around the axis of the first through hole. A piston rod is provided for each piston hole. The air injection assembly also includes a second pressure plate, which is connected to all of the piston rods. The demolding rod is located between the second pressure plate and the lower mold, and the second pressure plate can push the demolding rod to move toward the lower mold.

[0013] Secondly, a sample preparation method is provided, and a preferred embodiment of the above-mentioned pot-type insulator casting mold is provided, comprising the following steps:

[0014] Step 100: Place the metal part of the basin insulator on the lower mold, insert the first protrusion of the lower mold into the center hole of the metal part, and connect and fix the upper mold, middle mold and lower mold.

[0015] Step 200: Pour materials into the pouring area;

[0016] Step 300: After the material has solidified, separate the upper mold and the middle mold, insert the demolding rod into the first through hole of the middle mold, and press the demolding rod to separate the casting part of the pot insulator from the middle mold.

[0017] As a preferred embodiment of the sample preparation method, before pressing the release rod, the method further includes:

[0018] Inject gas into the gas channel.

[0019] As a preferred embodiment of the sample preparation method, step 300 includes:

[0020] After the material has solidified, separate the upper mold and the middle mold;

[0021] Fix the mounting plate to the middle mold;

[0022] Insert the demolding rod into the guide hole of the mounting plate;

[0023] A piston rod is inserted into the piston hole of the mounting plate, and the second pressure plate is spaced apart from the demolding rod;

[0024] Press the second pressure plate continuously until the second pressure plate pushes the demolding rod, and the casting part separates from the middle mold.

[0025] The beneficial effects of this invention are as follows: By setting an upper mold, a middle mold, and a lower mold, the separation of the upper mold and the middle mold is easier because the casting part does not contact the upper mold. After separating the upper mold and the middle mold, the metal part of the pot insulator can be exposed. Then, the pot insulator can be pushed with a demolding rod to separate the middle mold from the casting part. This reduces the difficulty of demolding, avoids the use of methods such as hammering for demolding, and ensures the integrity of the pot insulator structure after demolding, thereby ensuring the molding quality of the pot insulator. By setting a first protrusion, displacement of the metal part can be prevented during the casting process, ensuring the molding quality of the pot insulator. By setting the end of the second protrusion... The surface abuts against the metal part, allowing the metal part to be exposed after the upper mold separates from the middle mold. The pushing force of the demolding rod acts on the metal part of the pot insulator. The demolding rod does not contact the casting part of the pot insulator. The pressure of the demolding rod acts on the metal part of the pot insulator and is transmitted from the metal part to the casting part, thereby achieving the separation of the casting part of the pot insulator from the middle mold. The strength of the metal part of the pot insulator is greater than the strength of the casting part. The metal part of the pot insulator is not easily deformed by the pressure of the demolding rod, and it is less likely to produce damage such as dents. This can ensure the quality of the pot insulator after demolding. Attached Figure Description

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the basin-type insulator described in an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional schematic diagram of the basin-type insulator described in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of a basin-type insulator casting mold according to an embodiment of the present invention (without gas channels).

[0030] Figure 4 This is a cross-sectional schematic diagram of a basin-type insulator casting mold according to an embodiment of the present invention (without gas channels).

[0031] Figure 5 This is a schematic diagram of the demolding of the basin-type insulator casting mold according to an embodiment of the present invention (without gas channels).

[0032] Figure 6 This is a schematic diagram of the upper mold (without sealing block) according to an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the intermediate mold according to an embodiment of the present invention (without gas channels).

[0034] Figure 8 This is a schematic diagram of the lower mold according to an embodiment of the present invention.

[0035] Figure 9 This is a cross-sectional schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention (the upper mold and the middle mold are separated).

[0037] Figure 11 This is a schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention (connection of the mounting plate and the middle mold).

[0038] Figure 12 for Figure 11 Enlarged diagram of point A.

[0039] Figure 13 This is a schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention.

[0040] Figure 14 for Figure 13 A schematic diagram of the first pressure plate and piston rod in the embodiment.

[0041] Figure 15 for Figure 13 A schematic diagram of the first pressure plate, piston rod, and demolding rod in the embodiment.

[0042] Figure 16 This is a schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention.

[0043] Figure 17 This is a schematic diagram of the casting mold and metal part of the basin-type insulator according to another embodiment of the present invention (the middle mold and the lower mold are separated).

[0044] In the picture:

[0045] 100. Pot-type insulator; 200. Metal part; 300. Casting part; 400. Casting area;

[0046] 1. Upper mold; 101. Second protrusion; 102. Sealing block; 2. Middle mold; 201. Gas channel; 202. First through hole; 203. Pouring port; 204. Positioning groove; 3. Lower mold; 301. First protrusion; 302. Third protrusion; 4. Support plate; 5. Piston rod; 501. Rod body; 502. Rubber ring; 6. Demolding rod; 7. First pressure plate; 701. Clearance hole; 8. Second pressure plate; 9. Mounting plate; 901. Mounting part; 902. Positioning protrusion; 903. Piston hole; 10. Pin; 11. Sealing ring; 12. Mounting hole. Detailed Implementation

[0047] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] like Figures 1 to 17 As shown, the present invention provides a pot-type insulator casting mold (hereinafter referred to as the casting mold) for casting pot-type insulators 100. The pot-type insulator 100 includes a metal part 200 and a casting part 300. The pot-type insulator casting mold includes an upper mold 1, a middle mold 2, a lower mold 3, and a demolding rod 6. The upper mold 1, the middle mold 2, and the lower mold 3 are stacked sequentially and are detachably connected. The lower mold 3 and the middle mold 2 enclose a casting area 400, which is used to cast the casting part 300. The middle mold 2 is provided with a casting port 203, and the casting area 400 is connected to the external environment through the casting port 203. The lower mold 3 is located on the side close to the middle mold 2. The surface of the mold has a first protrusion 301. The metal part 200 is located in the casting area 400. The first protrusion 301 is inserted into the center hole of the metal part 200. The middle mold 2 has a first through hole 202. The upper mold 1 has a second protrusion 101. When the upper mold 1, the middle mold 2 and the lower mold 3 are connected, the second protrusion 101 is inserted into the first through hole 202. The end face of the second protrusion 101 abuts against the metal part 200, and the periphery of the second protrusion 101 fits against the hole wall of the first through hole 202. When the upper mold 1 and the middle mold 2 are separated, the demolding rod 6 can be inserted into the first through hole 202 and push the metal part 200 so that the cast basin insulator 100 is separated from the middle mold 2.

[0050] By setting up an upper mold 1, a middle mold 2, and a lower mold 3, the separation of the upper mold 1 and the middle mold 2 is relatively easy since the casting part 300 does not contact the upper mold 1. After separating the upper mold 1 and the middle mold 2, the metal part 200 of the basin insulator 100 can be exposed. Then, the demolding rod 6 is used to push the basin insulator 100 to separate the middle mold 2 from the casting part 300. This reduces the difficulty of demolding, avoids the use of methods such as hammering for demolding, and ensures the structural integrity of the basin insulator 100 after demolding, thereby ensuring the molding quality of the basin insulator 100. By setting the first protrusion 301, the displacement of the metal part 200 during the casting process can be prevented, ensuring the molding quality of the basin insulator 100. By setting the end face of the second protrusion 101 to abut against the metal part 200, the upper mold 1 and the middle mold 2 can be separated. After demolding, the metal part 200 can be exposed. The pushing force of the demolding rod 6 acts on the metal part 200 of the basin insulator 100. The demolding rod 6 does not contact the casting part 300 of the basin insulator 100. The pressure of the demolding rod 6 acts on the metal part 200 of the basin insulator 100 and is transmitted from the metal part of the basin insulator 100 to the casting part 300 of the basin insulator 100, thereby realizing the separation of the casting part 300 of the basin insulator 100 from the intermediate mold 2. It can be understood that the strength of the metal part 200 of the basin insulator 100 is greater than the strength of the casting part 300 of the basin insulator 100. The metal part 200 of the basin insulator 100 is not easily deformed by the pressure of the demolding rod 6, and is less likely to be damaged such as pits. This can ensure the quality of the basin insulator 100 after demolding.

[0051] In this embodiment, the basin insulator 100 is used for experiments. The basin insulator 100 is a scaled-down design with reduced size, and its size is smaller than that of the basin insulator 100 in the actual application environment.

[0052] The casting part 300 of the basin insulator 100 is an epoxy casting compound. Before curing, the epoxy casting compound is liquid. After curing at a specific temperature, the epoxy casting compound becomes solid, i.e., the casting part 300, so that the metal part 200 and the casting part 300 are integrally formed to form the basin insulator 100. It is used for the mold closing of the lower mold 3 and the middle mold 2. The lower mold 3 is provided with a third protrusion 302, which is used to reserve the hole position for subsequent installation of metal flanges on the scaled sample of the basin insulator 100 after curing. The number of third protrusions 302 is set to at least three, and the central angle between adjacent third protrusions 302 is 120°.

[0053] The upper mold 1, middle mold 2 and lower mold 3 are all provided with through mounting holes 12. The screws pass through the mounting holes 12 on the upper mold 1, middle mold 2 and lower mold 3 in sequence and are screwed on with nuts to fix the upper mold 1, middle mold 2 and lower mold 3.

[0054] The upper mold 1 and the middle mold 2 are separated using a metal cutting tool, exposing the first through hole 202 on the upper part of the middle mold 2. (Refer to...) Figure 3 The lower mold 3 is shorter on both sides than the middle mold 2. During demolding, the support plate 4 can be placed on the operating table, and the lower mold 3 can be placed face down on the support plate 4. Since the lower mold 3 is shorter on both sides than the middle mold 2, the support plate 4 contacts the middle mold 2. The thickness of the lower mold 3 is less than that of the support plate 4, so that there is a certain distance between the bottom of the lower mold 3 and the middle of the operating table. During mold separation, the demolding rod 6 is placed on the diameter side at the first through hole 202 of the middle mold 2. The demolding rod 6 is subjected to downward pressure by manpower or a press, which drives the demolding rod 6 and the lower mold 3 to move downward, so that the middle mold 2 and the lower mold 3 separate, completing the mold separation operation. During the mold separation process, the mold can be kept in a horizontal state to avoid the problem of uneven force on the insert.

[0055] Furthermore, a gas channel 201 is provided on the side of the middle mold 2 near the upper mold 1. The gas channel 201 is connected to the casting area 400 and is used to ventilate the casting area 400 so that the casting part 300 in the casting area 400 can be separated from the middle mold 2. The upper mold 1 is provided with a sealing block 102. When the upper mold 1 and the middle mold 2 are connected, the sealing block 102 blocks the gas channel 201. By providing the gas channel 201, gas can be injected into the casting area 400 during the demolding process, so that a gap can be created between the casting part 300 and the middle mold 2, which facilitates demolding.

[0056] In this embodiment, the pressure applied by the demolding rod 6 to the basin insulator 100 acts directly on the metal part 200 of the basin insulator 100. The casting part 300 of the basin insulator 100 is not directly subjected to the pushing force of the demolding rod 6. Therefore, during the demolding process, the force between the metal part 200 and the casting part 300 of the basin insulator 100 is uneven, which can easily cause the metal part 200 and the casting part 300 to separate. Therefore, a gas channel 201 is provided to assist the demolding of the casting part 300 of the basin insulator 100 by using gas pressure. On the one hand, this can reduce the difficulty of demolding. On the other hand, it can apply pressure to the casting part 300 of the basin insulator 100, balance the force between the casting part 300 and the metal part 200, and ensure the quality of the basin insulator 100 after demolding.

[0057] Furthermore, the casting mold also includes a gas injection assembly, which includes a mounting plate 9 and a piston rod 5. The mounting plate 9 has a piston hole 903, and the piston rod 5 is disposed within the piston hole 903. The mounting plate 9 and the intermediate mold 2 are sealed together, and the piston hole 903 communicates with the gas channel 201. When the piston rod 5 moves towards the intermediate mold 2, the gas in the piston hole 903 is injected into the gas channel 201. By setting up the gas injection assembly, gas can be injected into the gas channel 201 by pushing the piston rod 5, eliminating the need for equipment such as blowers to ventilate the gas channel 201, thus reducing the production cost of the basin insulator 100.

[0058] Preferably, the surface of the intermediate mold 2 is recessed with a positioning groove 204, and the gas channel 201 penetrates the bottom of the positioning groove 204. A positioning protrusion 902 is provided on the mounting plate 9, and a piston hole 903 penetrates the positioning protrusion 902. The positioning protrusion 902 is inserted into the positioning groove 204, and a sealing ring 11 is clamped between the end face of the positioning protrusion 902 and the bottom of the positioning groove 204. By providing the sealing ring 11, the gap between the intermediate mold 2 and the mounting plate 9 can be sealed, preventing gas from escaping from the gap. This ensures that the movement of the piston rod 5 can inject the gas in the piston hole 903 into the gas channel 201, thereby separating the casting part 300 of the basin insulator 100 from the intermediate mold 2.

[0059] Reference Figure 12 In this embodiment, the piston rod 5 includes a rod body 501 and a rubber ring 502 disposed around the rod body 501.

[0060] Reference Figure 11 Furthermore, in this embodiment, the periphery of the mounting plate 9 extends downward to form a mounting portion 901. The mounting portion 901, the mounting plate 9, and the middle mold 2 are connected by a pin 10. The pin 10 passes through the mounting portion 901 and is inserted into the middle mold 2.

[0061] Furthermore, the mounting plate 9 is provided with a guide hole, which communicates with the first through hole 202, and the demolding rod 6 is inserted into the guide hole. By providing the guide hole, on the one hand, the movement of the demolding rod 6 can be guided; on the other hand, when using the demolding rod 6 for demolding, it is not necessary to disassemble the mounting plate 9, which facilitates the demolding operation and improves efficiency.

[0062] Reference Figure 13 and Figure 14Furthermore, the mounting plate 9 is provided with multiple piston holes 903, all of which are arranged in a ring around the axis of the first through hole 202. A piston rod 5 is provided for each piston hole 903. The gas injection assembly also includes a first pressure plate 7, which is connected to all the piston rods 5. A clearance hole 701 is provided in the center of the first pressure plate 7, and the demolding rod 6 passes through the clearance hole 701. By providing multiple piston holes 903, the number of gas channels 201 can be increased, thereby increasing the amount of gas introduced into the casting area 400 and improving the demolding effect. By providing the first pressure plate 7, all the piston rods 5 can be pressed at the same time, improving the demolding efficiency.

[0063] Reference Figures 15 to 17 In another embodiment, the mounting plate 9 is provided with a plurality of piston holes 903, all of which are distributed in a ring around the axis of the first through hole 202. A piston rod 5 is provided for each piston hole 903. The air injection assembly also includes a second pressure plate 8, which is connected to all the piston rods 5. The demolding rod 6 is located between the second pressure plate 8 and the lower mold 3. The second pressure plate 8 can push the demolding rod 6 to move toward the lower mold 3. By setting a second pressure plate 8, in the initial state, the second pressure plate 8 is spaced apart from the demolding rod 6. During the downward pressing of the second pressure plate 8, the demolding rod 6 is not under force, and the gas injection component only injects gas into the casting area 400. The downward movement of the second pressure plate 8 shortens the distance between the second pressure plate 8 and the demolding rod 6 until the end face of the second pressure plate 8 abuts against the demolding rod 6, causing the second pressure plate 8 to continue to move downward. The second pressure plate 8 drives the demolding rod 6 to move downward. At this time, the gas injection component injects gas into the casting area 400, pushing the casting part 300 to separate from the middle mold 2, and the demolding rod 6 pushes the metal part 200 of the pot insulator 100 to move downward. The two forces work together on the pot insulator 100 to improve the demolding efficiency and effect.

[0064] In this embodiment, the gas channel 201 is located near the first through hole 202, which can minimize the separation of the metal part 200 and the casting part 300 of the basin insulator 100 during the demolding process.

[0065] When the upper mold 1 is connected to the middle mold 2, the end face of the sealing block 102 of the upper mold 1 is smoothly connected to the side of the middle mold 2, which can improve the molding quality of the casting part 300 of the pot insulator 100.

[0066] In this embodiment, the upper mold 1, the middle mold 2, and the lower mold 3 are all made of high-strength steel. For example, the upper mold 1, the middle mold 2, and the lower mold 3 are all made of SKD11 mold steel to improve the service life of the mold. Of course, in other embodiments, the upper mold 1, the middle mold 2, and the lower mold 3 can also be made of other materials. The materials of the upper mold 1, the middle mold 2, and the lower mold 3 can be the same or different. This embodiment does not impose any restrictions. It should be noted that the melting point of the upper mold 1, the middle mold 2, and the lower mold 3 needs to be higher than the melting point of the casting part 300 of the basin insulator 100 to avoid melting and deformation of the upper mold 1, the middle mold 2, and the lower mold 3 during the casting process.

[0067] Preferably, the support plate 4, the piston rod 501, the first pressure plate 7, the second pressure plate 8, and the demolding rod 6 are made of hard metals such as iron or steel to improve their service life. Of course, the materials of the support plate 4, the piston rod 501, the first pressure plate 7, the second pressure plate 8, and the demolding rod 6 can be the same or different, and this embodiment does not impose any restrictions.

[0068] This embodiment also provides a sample preparation method, which provides the casting mold in any of the above embodiments, including the following steps:

[0069] Step 100: Place the metal part 200 of the basin insulator 100 on the lower mold 3, insert the first protrusion 301 of the lower mold 3 into the center hole of the metal part 200, and connect and fix the upper mold 1, the middle mold 2 and the lower mold 3.

[0070] Step 200: Pour material into the pouring area 400;

[0071] Step 300: After the material has solidified, separate the upper mold 1 and the middle mold 2, insert the demolding rod 6 into the first through hole 202 of the middle mold 2, and press the demolding rod 6 to separate the casting part 300 of the pot insulator 100 from the middle mold 2.

[0072] By setting the upper mold 1 to separate from the middle mold 2 first, the metal part 200 of the basin insulator 100 can be exposed. The metal part 200 has greater strength and can provide a force point for the demolding rod 6. By pushing the metal part 200 of the basin insulator 100, the basin insulator 100 can be separated from the middle mold 2, which is convenient to operate.

[0073] Furthermore, before pressing the demolding rod 6, air is injected into the gas channel 201. By first injecting air into the gas channel 201, a gap can be created between the casting part 300 of the pot insulator 100 and the intermediate mold 2, reducing the tightness of the connection between the casting part 300 of the pot insulator 100 and the intermediate mold 2. At this time, pressing the demolding rod 6 can reduce the difficulty of demolding the pot insulator 100.

[0074] Furthermore, step 300 includes:

[0075] After the material has solidified, use a soft metal knife to separate the upper mold 1;

[0076] Fix the mounting plate 9 to the middle mold 2;

[0077] Insert the release rod 6 into the guide hole of the mounting plate 9;

[0078] Insert the piston rod 5 into the piston hole 903 of the mounting plate 9, with the second pressure plate 8 spaced apart from the demolding rod 6;

[0079] Press the second pressure plate 8 continuously until the second pressure plate 8 pushes the demolding rod 6, and the casting part 300 of the pot insulator 100 separates from the middle mold 2.

[0080] By setting the second pressure plate 8, during the demolding process, the external thrust can be applied only to the second pressure plate 8 to complete the injection of gas into the gas channel 201 and the pushing of the metal part 200 by the demolding rod 6. There is no need to adjust the position of the external thrust, which reduces the difficulty of the demolding operation and improves efficiency.

[0081] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0082] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider 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.

[0084] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A casting mold for a pot-type insulator, used for casting pot-type insulators, said pot-type insulator comprising a metal part and a casting part, characterized in that, The pot-type insulator casting mold includes an upper mold, a middle mold, a lower mold, and a demolding rod. The upper mold, the middle mold, and the lower mold are stacked sequentially and are detachably connected. The lower mold and the middle mold enclose a casting area for casting the part. The middle mold has a pouring port, and the casting area communicates with the external environment through the pouring port. A first protrusion is provided on one side of the lower mold near the middle mold. The metal part is disposed within the casting area. The first protrusion is inserted into the center hole of the metal part. The middle mold is provided with a first through hole. The upper mold is provided with a second protrusion. When the upper mold, the middle mold and the lower mold are connected, the second protrusion is inserted into the first through hole. The end face of the second protrusion abuts against the metal part, and the periphery of the second protrusion fits against the hole wall of the first through hole. When the upper mold and the middle mold are separated, the demolding rod can be inserted into the first through hole and push the metal part to separate the cast basin insulator from the middle mold.

2. The pot-type insulator casting mold according to claim 1, characterized in that, A gas channel is provided on one side of the middle mold near the upper mold. The gas channel is connected to the casting area and is used to ventilate the casting area so that the casting part in the casting area is separated from the middle mold. The upper mold is provided with a sealing block. When the upper mold and the middle mold are connected, the sealing block blocks the gas channel.

3. The pot-type insulator casting mold according to claim 2, characterized in that, It also includes a gas injection assembly, which includes a mounting plate and a piston rod. The mounting plate is provided with a piston hole, and the piston rod is disposed in the piston hole. The mounting plate and the intermediate mold are sealed together, and the piston hole communicates with the gas channel. When the piston rod moves toward the intermediate mold, the gas in the piston hole is injected into the gas channel.

4. The pot-type insulator casting mold according to claim 3, characterized in that, The surface of the intermediate mold is recessed with a positioning groove, the gas channel passes through the bottom of the positioning groove, the mounting plate is provided with a positioning protrusion, the piston hole passes through the positioning protrusion, the positioning protrusion is inserted into the positioning groove, and a sealing ring is clamped between the end face of the positioning protrusion and the bottom of the positioning groove.

5. The pot-type insulator casting mold according to claim 3, characterized in that, The mounting plate is provided with a guide hole, which communicates with the first through hole, and the demolding rod is inserted into the guide hole.

6. The pot-type insulator casting mold according to claim 5, characterized in that, The mounting plate is provided with a plurality of piston holes, all of which are arranged in a ring around the axis of the first through hole. A piston rod is provided for each piston hole. The air injection assembly also includes a first pressure plate, which is connected to all the piston rods. A clearance hole is provided at the center of the first pressure plate, and the demolding rod passes through the clearance hole.

7. The pot-type insulator casting mold according to claim 5, characterized in that, The mounting plate is provided with a plurality of piston holes, all of which are arranged in a ring around the axis of the first through hole. A piston rod is provided for each piston hole. The air injection assembly also includes a second pressure plate, which is connected to all the piston rods. The demolding rod is located between the second pressure plate and the lower mold, and the second pressure plate can push the demolding rod to move toward the lower mold.

8. A sample preparation method, characterized in that, Providing a pot-type insulator casting mold as described in claim 7 includes the following steps: Step 100: Place the metal part of the basin insulator on the lower mold, insert the first protrusion of the lower mold into the center hole of the metal part, and connect and fix the upper mold, the middle mold and the lower mold. Step 200: Pour materials into the pouring area; Step 300: After the material has solidified, separate the upper mold and the middle mold, insert the demolding rod into the first through hole of the middle mold, and press the demolding rod to separate the casting part of the pot insulator from the middle mold.

9. The sample preparation method according to claim 8, characterized in that, Before pressing the release lever, it also includes: Inject gas into the gas channel.

10. The sample preparation method according to claim 9, characterized in that, Step 300 includes: After the material has solidified, separate the upper mold and the middle mold; Fix the mounting plate to the middle mold; Insert the demolding rod into the guide hole of the mounting plate; A piston rod is inserted into the piston hole of the mounting plate, and the second pressure plate is spaced apart from the demolding rod; Press the second pressure plate continuously until the second pressure plate pushes the demolding rod, and the casting part separates from the middle mold.

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