Split mold and method for making insulated elbow

Abstract

The application discloses a split mold and method for manufacturing an insulating elbow pipe. The mold comprises a first mold body and a second mold body which are connected in a detachable mode, and a third mold body which is clamped between the first mold body and the second mold body and is located at the opening of the first mold body and the second mold body and fills the opening, so that the first mold body and the second mold body form a fully-closed pipe structure. In order to facilitate disassembly, the third mold body is formed by splicing a plurality of detachable combination blocks. The integrated insulating elbow pipe is manufactured by using the pipe structure. After the manufacturing is completed, the first mold body and the second mold body can be pulled out from the inside of the insulating elbow pipe, and then the combination blocks of the third mold body are pulled out in sequence according to the principle of first middle and then both sides, so that the insulating elbow pipe is smoothly demolded. The mold can be used to manufacture the integrated insulating elbow pipe which is regular in shape and meets the product style, and after the manufacturing is completed, the demolding of the insulating elbow pipe is convenient and fast, and the qualified rate of the product is improved.

Description

Technical Field

[0001] This invention belongs to the field of transformer insulating tube manufacturing, specifically relating to a split mold and method for manufacturing insulating tubes. Background Technology

[0002] As a key component of transformer equipment, the outgoing line device plays a crucial role in drawing high voltage from inside the equipment and connecting it to external accessories. The performance of the insulating bend, as one of the key components of the outgoing line device, is of paramount importance to the outgoing line device and even the entire transformer equipment.

[0003] In recent years, with the increase in transformer capacity and voltage levels, as well as the diversification of styles, the requirements for insulation components have become increasingly stringent, demanding greater functionality. Therefore, in-depth research has been conducted on the manufacturing of insulating bends. Traditional insulating bends employ a split structure, with two parts manufactured using a mold and then assembled together. However, the insulation performance and reliability of these split-assembly insulating bends, due to their assembly process, are increasingly unable to meet the demands of large-capacity and high-voltage transformers. Therefore, there is an urgent need to manufacture one-piece insulating bends to meet the ever-growing market demand. However, due to the shape of traditional insulating bends, there is a lack of a mold capable of producing one-piece insulating bends with a regular shape and conforming to product specifications. Summary of the Invention

[0004] To overcome the above-mentioned technical defects, the present invention provides a split mold and method for manufacturing insulated bends. By using this mold, the technical problem that existing molds cannot produce integrated insulated bends with regular shapes and conforming to product styles can be solved.

[0005] To achieve the above objectives, the present invention employs the following technical content:

[0006] A split mold for manufacturing insulated bends includes: a first mold body and a second mold body that can be detachably connected;

[0007] The first mold body has a first opening at its bent end, and the second mold body has a second opening at its bent end; a third mold body is engaged between the first mold body and the second mold body; the third mold body fills the first opening and the second opening, so that the first mold body and the second mold body combine to form a fully enclosed pipe structure;

[0008] The third module is formed by assembling multiple modular blocks.

[0009] Furthermore, the first mold body and the second mold body are connected by bolts.

[0010] Furthermore, a first through wire is inserted into the first mold body; one end of the first through wire is threaded to the inner wall of the top of the second mold body, and the other end is fixed to the bottom of the first mold body by a first nut.

[0011] Furthermore, a second fixing plate is provided on the inner wall of the top of the second mold body; the second fixing plate is provided with a threaded hole that mates with the first through wire.

[0012] Furthermore, a second through wire is inserted into the second mold body; one end of the second through wire is threaded to the inner wall of the top of the second mold body, and the other end is fixed to the bottom of the second mold body by a second nut.

[0013] Furthermore, a first fixing plate is provided on the inner wall of the top of the first mold body; the first fixing plate is provided with a threaded hole that mates with the second through wire.

[0014] Furthermore, the third module includes a combination block A, a combination block B, and a combination block C connected in sequence;

[0015] The combined block A has the same structure as the combined block C; the combined block A includes a first arc-shaped edge A, a first circular arc A, a second circular arc A, a third circular arc A, and a second arc-shaped edge A; the combined block B includes a first circular arc B, a second circular arc B, a third circular arc B, and a fourth circular arc B; the combined block C includes a first arc-shaped edge C, a first circular arc C, a second circular arc C, a third circular arc C, and a second arc-shaped edge C; the second circular arc A is connected to the second circular arc B; the second circular arc C is connected to the fourth circular arc B;

[0016] The first arc-shaped edge A and the first arc-shaped edge C are respectively connected to the first mold body; the second arc-shaped edge A and the second arc-shaped edge C are respectively connected to the second mold body;

[0017] The first arc A, the first arc B and the first arc C form a semi-circular first end face, and the first end face is connected to the semi-circular end face of the first mold body;

[0018] The third arc A, the third arc B and the third arc C form a semi-circular second end face, which is connected to the semi-circular end face of the second mold body;

[0019] A tapered pin is provided on the semi-circular end face of the first mold body, which is connected to a pin hole opened on the first end face; a tapered pin is provided on the semi-circular end face of the second mold body, which is connected to a pin hole opened on the second end face.

[0020] Furthermore, the combined block B is connected to the combined block A and the combined block C through a stepped structure.

[0021] A demolding method based on the above-mentioned split mold for manufacturing insulated bends includes:

[0022] After the insulating bend is made, disconnect the connection between the first mold and the second mold, remove the first mold and the second mold from the split mold and pull them out from the inside of the insulating bend, pull the assembly block located in the middle of the third mold out from the inside of the insulating bend, and then pull the assembly blocks located on both sides of the third mold out from the inside of the insulating bend in sequence to complete the demolding.

[0023] Furthermore, including:

[0024] The first mold and the second mold are disconnected by unscrewing the bolts between them.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention provides a split mold for manufacturing insulated bends. The mold consists of a first mold body and a second mold body connected in a detachable manner. A third mold body is interlocked between the first and second mold bodies, located at the opening between them and filling the opening, thus forming a fully enclosed pipe structure. For easy disassembly, the third mold body is composed of multiple detachable modular blocks. After assembling the first, second, and third mold bodies, an integrally formed insulated bend is manufactured using the pipe structure. After manufacturing, due to the split structure of the mold, the first and second mold bodies can be pulled out from the inside of the insulated bend first, and then the modular blocks of the third mold body can be pulled out sequentially according to the principle of removing the middle first and then the sides, achieving smooth demolding of the insulated bend. This mold can produce integrally formed insulated bends with regular shapes that conform to the product style, and ensures convenient and quick demolding after manufacturing, improving the product qualification rate. This mold is easy to assemble and disassemble and has good application value.

[0027] Preferably, the first mold body and the second mold body of the present invention are fixedly connected by bolts. In this way, demolding can be completed conveniently and quickly without the need for other demolding tools, which not only improves work efficiency, but also improves safety by eliminating the need for brute force to tear the demolding.

[0028] More preferably, the present invention uses a combination of a through wire and a nut to connect the top of the first mold body and the second mold body, which not only achieves the fixation between the first mold body and the second mold body, but also plays a good limiting role for the third mold body located between the two, providing pre-tightening force for the third mold body and preventing the assembly block of the third mold body from slipping off.

[0029] Preferably, the third mold body of the present invention has a pin hole that can cooperate with the tapered pins on the first mold body and the second mold body, thereby achieving precise positioning between the third mold body and the first and second mold bodies, which facilitates the assembly and positioning of the mold.

[0030] Preferably, the two sides of the assembly block B of the present invention are provided with inverted step structures, which are used in conjunction with the step structures on the assembly block A and the step structures on the assembly block C. The step structures are connected to achieve a better positioning effect, which facilitates the early assembly of the third mold body and the disassembly and demolding after the production is completed.

[0031] The present invention also provides a demolding method. Based on the above-mentioned split mold for making insulating bends, after the insulating bend is made, the connection between the first mold body (1) and the second mold body (2) is disconnected, the first mold body and the second mold body are removed from the split mold and extracted from the inside of the insulating bend, the assembly block located in the middle of the third mold body is extracted from the inside of the insulating bend, and the assembly blocks located on both sides of the third mold body are extracted from the inside of the insulating bend in sequence to complete the demolding. Using this method, the split mold can be easily and conveniently removed from the insulating bend product, ensuring the smooth demolding of the insulating bend. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a split mold for manufacturing an insulating bend provided in Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the first mold for manufacturing a split mold for insulating pipe according to Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the second mold for manufacturing a split mold for insulating pipe bending, provided in Embodiment 1 of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the third mold for manufacturing a split mold for insulating pipe bending, provided in Embodiment 1 of the present invention.

[0036] Figure 5 This is a schematic diagram of a split mold for manufacturing an insulating bend provided in Embodiment 2 of the present invention;

[0037] Figure 6 is a schematic diagram of the structure of the third mold provided in Embodiment 2 of the present invention, wherein (a) is a schematic diagram of the assembly block A; (b) is a schematic diagram of the assembly block B; and (c) is a schematic diagram of the assembly block C.

[0038] Figure 7 This is a diagram showing the state of the second mold body being removed during the demolding process of the split mold used in the manufacture of the insulating bent pipe in this invention.

[0039] Figure 8This is a diagram showing the state of the first mold body being removed during the demolding process of the split mold used in the manufacture of the insulating bent pipe in this invention.

[0040] Figure 9 This is a diagram showing the state of the assembly block B of the third mold body being removed during the demolding process of the split mold used to manufacture the insulating bent pipe in this invention.

[0041] Figure 10 This is a diagram showing the state of the third mold assembly block A being removed during the demolding process of the split mold used to manufacture the insulating bent pipe in this invention.

[0042] Figure label:

[0043] First mold body-1; Second mold body-2; Third mold body-3; Base-4; First through thread-5; Second through thread-6; First fixing plate-7; Second fixing plate-8; First nut-9; Second nut-10;

[0044] Combination block A-3-1; Combination block B-3-2; Combination block C-3-3;

[0045] First arc side A-3-1-1; First circular arc A-3-1-2; Second circular arc A-3-1-3; Third circular arc A-3-1-4; Second arc side A-3-1-5;

[0046] First arc B-3-2-1; Second arc B-3-2-2; Third arc B-3-2-3; Fourth arc B-3-2-4;

[0047] First arc edge C-3-3-1; First arc C-3-3-2; Second arc C-3-3-3; Third arc C-3-3-4; Second arc edge C-3-3-5. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0054] The present invention will now be described in further detail with reference to the accompanying drawings:

[0055] Example 1

[0056] Because existing technologies using traditional molds and manufacturing processes can only produce split-type insulating bends, requiring subsequent assembly processes to join and fix the two parts together, the insulation performance and reliability of insulating bends produced by this process are gradually failing to meet the requirements of large-capacity and high-voltage transformers. Therefore, it is necessary to produce integrated insulating bends that are regular in shape and conform to the product design. Therefore, this embodiment provides a split mold for manufacturing insulating bends. Using this split mold, integrated insulating bends with regular shapes and conforming to the product design are produced. Furthermore, after manufacturing, the insulating bends can be easily and quickly demolded, improving the product qualification rate.

[0057] like Figure 1As shown, this embodiment provides a split mold for manufacturing insulated bends, including a first mold 1, a second mold 2, and a third mold 3.

[0058] like Figure 2 As shown, the bottom of the first mold 1 is welded to the base 4 (the operating table for making the insulating bent pipe), the top of the first mold 1 is connected to the top of the second mold 2, and the third mold 3 is clamped between the first mold 1 and the second mold 2. The specific structure of the second mold 2 is as follows: Figure 3 As shown.

[0059] The first mold 1, the second mold 2 and the third mold 3 are detachably connected to each other; the third mold 3 fills the first opening of the first mold 1 and the second opening of the second mold 2, so that the whole forms a fully enclosed pipe structure, which is similar to a fully enclosed L-shaped pipe structure with a cavity, and the third mold 3 is located at the corner of the fully enclosed L-shaped pipe structure.

[0060] like Figure 4 As shown, the third mold 3 is formed by assembling assembly blocks A3-1, B3-2, and C3-3. It should be noted that the third mold 3 can also use four or more assembly blocks. Considering cost and design simplification, three assembly blocks are preferred while ensuring easy disassembly and demolding. At the same time, in order to facilitate demolding, the height of assembly blocks A3-1 and C3-3 should be slightly smaller than the diameter of the cylindrical section of the second mold 2.

[0061] like Figure 7 — Figure 10 As shown, this embodiment provides a demolding method for the above-mentioned split mold used to manufacture insulated bends: as follows Figure 7 and Figure 8 As shown, disconnect the connection between the first mold body 1 and the second mold body 2, remove the first mold body 1 and the second mold body 2 from the split mold and pull them out from inside the insulating bend (here, the first mold body 1 and the second mold body 2 can be removed in any order; in the figure, the second mold body 2 is removed first, or the first mold body 1 can be removed first). Figure 9 As shown, the assembly block (assembly block B3-2) located in the middle of the third module 3 is removed from the inside of the insulating bend, as follows. Figure 10 As shown, the assembly blocks (assembly block A3-1 and assembly block C3-3) located on both sides of the third mold body 3 are sequentially removed from the inside of the insulating bend (similarly, the order of assembly blocks A3-1 and assembly block C3-3 is not important; assembly block A3-1 is removed first in the figure, or assembly block C3-3 can be removed first), thus completing the demolding.

[0062] Using the above demolding method, it is possible to easily and conveniently remove the split mold from the insulating bend product, thus achieving successful demolding of the insulating bend.

[0063] Example 2

[0064] This embodiment provides another split mold for manufacturing insulated bends, which is a further improvement and refinement based on Embodiment 1, such as... Figure 5 As shown, the first mold body 1 and the second mold body 2 are connected by bolts, which makes it easy to disassemble the entire split mold during demolding.

[0065] The specific connection method is as follows: A first through wire 5 is inserted into the first mold body 1; one end of the first through wire 5 is threadedly connected to the inner wall of the top of the second mold body 2, and the other end is fixed to the bottom of the first mold body 1 by a first nut 9. A second fixing plate 8 is provided on the inner wall of the top of the second mold body 2; the second fixing plate 8 has a threaded hole that mates with the first through wire 5.

[0066] A second through wire 6 is inserted into the second mold body 2; one end of the second through wire 6 is threadedly connected to the inner wall of the top of the first mold body 1, and the other end is fixed to the bottom of the second mold body 2 by a second nut 10. A first fixing plate 7 is provided on the inner wall of the top of the first mold body 1; the first fixing plate 7 has a threaded hole that mates with the second through wire 6.

[0067] After the insulating bend is made, loosen the first nut 9 and the second nut 10, and unscrew the first threaded wire 5 and the second threaded wire 6 from their corresponding threaded holes to disconnect the first mold body 1 from the second mold body 2. In this way, the preload between the three assembly blocks (assembly block A3-1, assembly block B3-2 and assembly block C3-3) of the third mold body 3 disappears. After the first mold body 1 and the second mold body 2 are removed, assembly block B3-2 can be removed first, followed by assembly blocks A3-1 and C3-3, thus achieving smooth demolding.

[0068] Therefore, it can be seen that using bolts and nuts to form a connection in the cavity of the mold has two advantages. First, because the connection is set inside the cavity, the forming of the insulating bend is not affected in any way. Second, the simple bolt and nut fixing method can achieve easy and convenient demolding without the need for other demolding tools. This is different from the brute force tearing demolding method, which can ensure the qualification rate of the insulating bend products and produce one-piece insulating bends with regular shapes that conform to the product style.

[0069] For example Figure 5 As shown, pin holes are provided at the end faces of the assembly blocks A3-1, B3-2, and C3-3 that connect to the first mold 1 and the second mold 2. These pin holes can cooperate with the tapered pins on the first mold 1 and the second mold 2, ensuring easy and accurate positioning during assembly, greatly improving work efficiency, and also ensuring the production yield of the product.

[0070] As shown in Figure 6, the specific structure and connection relationship of the above-mentioned assembly blocks A3-1, B3-2 and C3-3 that make up the third module 3 are as follows:

[0071] As shown in Figures 6(a) and 6(b), the combined block A3-1 and combined block C3-3 have the same structure; combined block A3-1 includes a first arc-shaped edge A3-1-1, a first circular arc A3-1-2, a second circular arc A3-1-3, a third circular arc A3-1-4, and a second arc-shaped edge A3-1-5; as shown in Figure 6(c), combined block B3-2 includes a first circular arc B3-2-1, a second circular arc B3-2-2, a third circular arc B3-2-3, and a fourth circular arc B3-2-4; combined block C3-3 includes a first arc-shaped edge C3-3-1, a first circular arc C3-3-2, a second circular arc C3-3-3, a third circular arc C3-3-4, and a second arc-shaped edge C3-3-5; the second circular arc A3-1-3 is connected to the second circular arc B3-2-2; the second circular arc C3-3-3 is connected to the fourth circular arc B3-2-4;

[0072] The first arc-shaped edge A3-1-1 and the first arc-shaped edge C3-3-1 are respectively connected to the first mold body 1; the second arc-shaped edge A3-1-5 and the second arc-shaped edge C3-3-5 are respectively connected to the second mold body 2;

[0073] The first arc A3-1-2, the first arc B3-2-1 and the first arc C3-3-2 form a semi-circular first end face, which is connected to the semi-circular end face of the first mold body 1;

[0074] The third arc A3-1-4, the third arc B3-2-3 and the third arc C3-3-4 form a semi-circular second end face, which is connected to the semi-circular end face of the second mold body 2.

[0075] To facilitate the removal and extraction of the third module 3 from the insulating bend, the following configuration is adopted:

[0076] The straight-line distance of the projection of the first arc-shaped edge A3-1-1 onto the axis of the second mold 2 should be less than the cross-sectional radius of the cylinder of the first mold 1; similarly, the first arc-shaped edge C3-3-1 adopts the same setting.

[0077] The straight-line distance of the projection of the second arc-shaped edge A3-1-5 onto the axis of the first mold 1 should be less than the cross-sectional radius of the cylinder of the second mold 2; similarly, the second arc-shaped edge C3-3-5 adopts the same setting.

[0078] To facilitate the assembly of modular blocks A3-1, B3-2, and C3-3, modular block B3-2 has inverted step structures on both sides. These structures work in conjunction with the step structures on modular blocks A3-1 and C3-3. The step structures connect the components, achieving a better positioning effect and facilitating the initial assembly of the third mold 3 as well as its disassembly and demolding after completion.

[0079] In summary, this invention provides a split mold and method for manufacturing insulated bends. Using this mold and method, one-piece insulated bends with regular shapes and conforming to product specifications can be produced. Compared with traditional molds and manufacturing processes, it has the following advantages:

[0080] This mold consists of a first mold body, a second mold body, and a third mold body connected in a detachable manner. These three parts can be assembled to form a fully enclosed L-shaped tubular structure with a cavity. For easy disassembly, the third mold body, located at the corner of the tubular structure, is also composed of multiple detachable modular blocks. After assembling the first, second, and third mold bodies, an integrally formed insulating bend is created using the L-shaped tubular structure. After fabrication, due to the mold's modular structure, the first and second mold bodies can be extracted from the inside of the insulating bend first, and then the modular blocks of the third mold body can be extracted sequentially, following the principle of removing the middle part first and then the sides, thus achieving smooth demolding of the insulating bend. This mold can produce integral insulating bends with regular shapes that conform to the product specifications. Furthermore, it ensures convenient and quick demolding of the insulating bend after fabrication, improving the product's pass rate. It also increases the safety factor, unlike existing mold demolding methods, allowing for demolding without tools or brute force. This mold is easy to assemble and disassemble, and has good application value.

[0081] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A split mold for manufacturing insulated bent pipes, characterized in that, include: A first mold (1) and a second mold (2) that can be detachably connected; The first mold (1) has a first opening at its bent end, and the second mold (2) has a second opening at its bent end; a third mold (3) is engaged between the first mold (1) and the second mold (2); the third mold (3) fills the first opening and the second opening, so that the first mold (1) and the second mold (2) combine to form a fully enclosed pipe structure; The third module (3) is formed by splicing together multiple modular blocks; The third module (3) includes a combination block A (3-1), a combination block B (3-2), and a combination block C (3-3) connected in sequence. The combined block A (3-1) has the same structure as the combined block C (3-3); the combined block A (3-1) includes a first arc-shaped edge A (3-1-1), a first circular arc A (3-1-2), a second circular arc A (3-1-3), a third circular arc A (3-1-4), and a second arc-shaped edge A (3-1-5); the combined block B (3-2) includes a first circular arc B (3-2-1), a second circular arc B (3-2-2), and a third circular arc B (3-2-3). The first arc A (3-1-3) and the second arc B (3-2-2) are connected; the second arc C (3-3-3) and the fourth arc B (3-2-4) are connected; the second arc A (3-1-3) and the fourth arc B (3-2-4 ...2-3) and the fourth arc B (3-2-4) are connected; the second arc A (3-2-3) and the fourth arc B (3-2-4) are connected; the second arc A (3-2-3) and the fourth arc B (3-2-4) are connected; the second arc A (3-2-3) and the fourth arc B (3-2-4) are connected; the second arc B (3-2-4) and the fourth arc B (3-2-4) are connected; the second arc A (3-2-3) and the fourth arc B (3-2-4) are connected; the second arc B (3-2-4) and the fourth arc B (3-2-4) are connected; the second arc B (3-2-4) and the fourth arc B (3-2-4) are connected; the second arc B (3-2-3) and the fourth arc B ( The first arc-shaped edge A (3-1-1) and the first arc-shaped edge C (3-3-1) are respectively connected to the first mold (1); the second arc-shaped edge A (3-1-5) and the second arc-shaped edge C (3-3-5) are respectively connected to the second mold (2); The first arc A (3-1-2), the first arc B (3-2-1) and the first arc C (3-3-2) form a semi-circular first end face, which is connected to the semi-circular end face of the first mold (1); The third arc A (3-1-4), the third arc B (3-2-3), and the third arc C (3-3-4) form a semi-circular second end face, which is connected to the semi-circular end face of the second mold (2); A tapered pin is provided on the semi-circular end face of the first mold body (1), which is connected to the pin hole opened on the first end face; a tapered pin is provided on the semi-circular end face of the second mold body (2), which is connected to the pin hole opened on the second end face. The first mold (1) and the second mold (2) are connected by bolts; A first through wire (5) is inserted into the first mold body (1); one end of the first through wire (5) is threaded to the inner wall of the top of the second mold body (2), and the other end is fixed to the bottom of the first mold body (1) by a first nut (9); A second fixing plate (8) is provided on the inner wall of the top of the second mold body (2); the second fixing plate (8) is provided with a threaded hole that cooperates with the first through wire (5); A second through wire (6) is inserted into the second mold body (2); one end of the second through wire (6) is threaded to the inner wall of the top of the first mold body (1), and the other end is fixed to the bottom of the second mold body (2) by a second nut (10); A first fixing plate (7) is provided on the inner wall of the top of the first mold body (1); the first fixing plate (7) is provided with a threaded hole that cooperates with the second through wire (6); The combined block B (3-2) is connected to the combined block A (3-1) and the combined block C (3-3) by a stepped structure.

2. A demolding method based on the split mold for manufacturing insulated bent pipes as described in claim 1, characterized in that, include: After the insulating bend is made, disconnect the connection between the first mold (1) and the second mold (2), remove the first mold (1) and the second mold (2) from the split mold and extract them from the inside of the insulating bend, extract the assembly block located in the middle of the third mold (3) from the inside of the insulating bend, and extract the assembly blocks located on both sides of the third mold (3) from the inside of the insulating bend in sequence to complete the demolding.

3. The demolding method for a split mold used in manufacturing an insulating bent pipe according to claim 2, characterized in that, include: The first mold (1) and the second mold (2) are disconnected by unscrewing the bolt between them.

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