Flue production mold

Abstract

The utility model provides a flue production die which comprises a first die, a second die and a third die, the first die comprises a first main body and a first boss, a cavity is formed in the first main body in a surrounding mode, the first boss is formed by vertically extending one end of the first main body towards the cavity, and the first boss is provided with a first fixing face; the second mold is detachably arranged in the cavity, and the second mold comprises a second main body, a mold pulling part and a second boss; the draft part is formed by obliquely bending one end, close to the first boss, of the second main body towards the cavity; a second boss is arranged at the tail end of the die drawing part and provided with a second fixing face. And a base plate; wherein the first main body and the second main body are coaxially arranged; the first fixing face and the second fixing face abut against the bottom plate. According to the flue production mold, the production quality and the production efficiency are ensured, and meanwhile, the actual requirements of low early-stage investment and low unit production cost are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of flues, and in particular relates to a flue production mould. Background Art

[0002] Flues are pipes used to remove kitchen smoke and bathroom exhaust, also known as exhaust ducts, ventilation ducts, or residential exhaust ducts. Cement flues are a widely used type of flue. During the construction of buildings such as residential units, cafeterias, and factories, cement flues are pre-installed near a unified exhaust area and connected to the roof of the building, allowing smoke and gas to be discharged uniformly from the top.

[0003] Figure 1 For the current production mold solution for flue modules, if manual production is used, workers need to first complete the molding of one surface on the bottom surface of the outer mold, and then place the inner mold on it, and then process the other surfaces of the flue module on the inner mold. Due to the large size of existing flue modules, they are all horizontally molded during production. Obviously, the processing efficiency is slow, the manpower investment is high, and the dimensional deviations of the molded flue modules are large, which affects the final installation effect. If the existing molding equipment is used for mechanized molding, although the molding quality and efficiency are improved, the equipment occupies a large area and the initial investment is high, which increases the cost of the flue mold. Therefore, a mold kit is needed that can meet the actual needs of low initial investment and low unit production cost while ensuring production quality and production efficiency. Summary of the Invention

[0004] In order to address the deficiencies of the prior art, the present invention provides a flue production mold, comprising a first mold, a second mold, and a base plate. The first body and the second body are coaxially arranged, and the first fixed surface and the second fixed surface are respectively in contact with the base plate. This ensures that the mold cavity formed by the first mold, the second mold, and the base plate is dimensionally stable, thereby ensuring the production consistency of the flue module. The flue production mold only requires one person to operate to complete the production of high-quality flue modules, resulting in lower production costs. The first mold, the second mold, and the base plate have simple structures, low production costs, and low initial investment.

[0005] The technical effects to be achieved by the present invention are specifically achieved through the following technical aspects:

[0006] The utility model provides a flue production mold, comprising:

[0007] A first mold includes a first body and a first boss, wherein the first body has a cavity formed therein, the first boss is formed by one end of the first body extending vertically toward the cavity, and the first boss is provided with a first fixing surface;

[0008] A second mold is detachably disposed in the cavity, the second mold comprising a second body, a draft portion, and a second boss; the draft portion is formed by an end of the second body adjacent to the first boss being bent obliquely toward the cavity; a second boss is provided at a distal end of the draft portion, and the second boss is provided with a second fixing surface;

[0009] and baseboard;

[0010] Wherein, the first body and the second body are coaxially arranged; the first fixing surface and the second fixing surface are respectively in contact with the bottom plate.

[0011] In some embodiments, the bottom plate includes a base, and an outer limit frame and an inner limit frame provided on the base;

[0012] The first boss is provided with an outer positioning surface, and the outer limit frame is closely connected to the outer positioning surface.

[0013] In some embodiments, the second boss is provided with an inner positioning surface, and the inner limit frame is closely connected to the inner positioning surface.

[0014] In some embodiments, the inner limit frame and the outer limit frame are protruded on the base, and the protruding height of the outer limit frame is higher than that of the inner limit frame; the outer positioning surface is located on the side of the first boss away from the second mold, and the inner positioning surface is located on the side of the second boss away from the first mold.

[0015] In some embodiments, the second mold further includes a handle portion, and the handle portion is formed by extending the end portion of the second body away from the bottom plate toward a direction away from the first mold.

[0016] In some embodiments, the first body, the second body and the second boss are square structures or circular structures respectively; the space surrounded by the first mold, the second mold and the base plate is a mold cavity, and the end of the mold cavity away from the base plate is a pouring port.

[0017] In some embodiments, at the pouring port, the edges of the first body and the second body are flush; the side of the first boss facing away from the bottom plate is a receiving molding surface, and the receiving molding surface is perpendicular to the first body.

[0018] In some embodiments, the first body and the second body share a central axis Z, and in any cross-section passing through the central axis Z, a distance from the pouring port to the central axis Z is greater than a distance from the first boss to the central axis Z.

[0019] In some embodiments, a hopper is further included, wherein the hopper includes a first plugging edge and a second plugging edge plugged into the pouring port, wherein the first plugging edge is attached to the first body and extends an outer guide plate obliquely in a direction away from the second mold; the second plugging edge is attached to the second body and extends an inner guide plate obliquely in a direction away from the first mold.

[0020] In some embodiments, the hopper further includes a connecting plate for connecting and fixing the inner guide plate and the outer guide plate.

[0021] In summary, the present invention has at least the following advantages:

[0022] 1. The flue production mold provided by the utility model forms a mold cavity with fixed size by the first mold, the second mold and the bottom plate, so that the shape of the flue module is accurate and the error is small, thereby ensuring the accuracy, verticality and horizontality of the flue module installation process.

[0023] 2. In actual use, the flue production mold provided by this utility model has the first and second molds positioned above the base plate. Assembly and disassembly during production only requires one person, or with the aid of a lifting device. This makes operation simple and convenient, and the flue module production efficiency is high.

[0024] 3. The flue production mold provided by the utility model has low manufacturing cost and can be used in conjunction with commonly used concrete vibrators, concrete mixers, pouring machines and other equipment. While the production quality of the flue module is guaranteed, there is no need to hire a large number of professional workers or purchase special molding equipment. The initial investment is small and the production cost of the flue module is low.

[0025] 4. The flue production mold provided by this utility model allows the flue modules produced to be assembled and installed. Therefore, the flue production mold can be made smaller according to actual conditions, making production easier. Furthermore, the safety of the produced flue modules during handling and installation is significantly improved. During installation, only one or two installers with minimal training are required, significantly reducing installation costs and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Axis side view of the production mold of the existing flue module.

[0027] Figure 2 This is an axial side view of the flue production mold in Example 1.

[0028] Figure 3 This is an axial side view of the first mold in Example 1.

[0029] Figure 4 for Figure 3 AA section view in.

[0030] Figure 5 This is a schematic diagram of the production of multiple flue production molds in Example 1.

[0031] Figure 6 for Figure 4 Enlarged view of point B in the figure.

[0032] Figure 7 for Figure 4 Enlarged view of point C in the figure.

[0033] Figure 8 This is an axial view of the flue production mold after being cut open in Example 1.

[0034] Figure 9 Schematic diagram of the distances from the pouring port and the first boss to the central axis Z in Example 1.

[0035] Figure 10 This is a schematic diagram of the flue splicing described in Example 1.

[0036] Figure 11 This is a cross-sectional view of the flue production mold in Example 2.

[0037] Figure 12 for Figure 10 Magnified view at F in .

[0038] Figure 13 This is an axial side view of the flue production mold with a circular structure after being cut open in Example 3.

[0039] Markings in the figure:

[0040] 100-Flue production mold;

[0041] 1-first mold, 11-first body, 12-cavity, 13-first boss, 131-first fixing surface,

[0042] 132-external positioning surface, 133-supporting forming surface;

[0043] 2-second mold, 21-second body, 22-mold drawing part, 23-second boss, 231-second fixing surface,

[0044] 232-inner positioning surface, 24-handle portion;

[0045] 3-bottom plate, 30-base, 31-outer limit frame, 32-inner limit frame;

[0046] 4-mold cavity, 41-pouring port;

[0047] 5-hopper, 51-first plug-in side, 52-second plug-in side, 53-outer guide plate, 54-inner guide plate,

[0048] 55-connecting plate;

[0049] 6- flue module, 61- steel mesh, 62- flue main body filler, 63- filling gap;

[0050] 7-Low frequency vibration platform;

[0051] 200-flue;

[0052] 300- Flue production mold with circular structure;

[0053] t1-the distance from the pouring port to the central axis Z, t2-the distance from the first boss to the central axis Z; DETAILED DESCRIPTION

[0054] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0055] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0058] Example 1

[0059] See Figure 2-Figure 3 This embodiment provides a flue production mold 100, comprising a first mold 1, a second mold 2, and a base plate 3. The first mold 1 comprises a first body 11 and a first boss 13. The first body 11 defines a cavity 12. The first boss 13 extends vertically from one end of the first body 11 toward the cavity 12. The first boss 13 is provided with a first fixing surface 131.

[0060] exist Figure 2-Figure 3 Based on Figure 4 The second mold 2 is detachably disposed in the cavity 12, and the second mold 2 includes a second main body 21, a draft portion 22, and a second boss 23. The draft portion 22 is formed by bending the end of the second main body 21 close to the first boss 13 toward the cavity 12. The end of the draft portion 22 is provided with a second boss 23, and the second boss 23 is provided with a second fixing surface 231. The first main body 11 and the second main body 21 are coaxially arranged. The first fixing surface 131 and the second fixing surface 231 are respectively abutted against the bottom plate 3.

[0061] For the convenience of subsequent description, the space surrounded by the first mold 1 , the second mold 2 and the bottom plate 3 is referred to as a mold cavity 4 .

[0062] The first mold 1 and the second mold 2 are coaxially arranged and abutted against the base plate 3, so that the mold cavity 4 formed by the first mold 1, the second mold 2 and the base plate 3 has a stable shape and a small dimensional error, and the flue module 6 produced can be guaranteed in terms of accuracy, verticality and horizontality. In actual use, the base plate 3 is located below the first mold 1 and the second mold 2 in the vertical direction, which makes the opening direction of the mold cavity 4 vertically upward, facilitating the entry of the molding material of the flue module 6. Since the opening direction of the mold cavity 4 is vertically upward, the loading and unloading processes of the first mold 1 and the second mold 2 can be carried out in the vertical direction. With the cooperation of the lifting equipment, one operator can complete the pre-production assembly of the flue production mold 100 and the demolding of the flue module 6 after molding, reducing the heavy reliance on manpower and personnel skills in production. In some embodiments, the first mold 1 and the second mold 2 can be made into a multi-plate assembly structure. When disassembling, the first mold 1 and the second mold 2 can be directly disassembled, which is more convenient for demolding.

[0063] In order to further improve the performance and surface quality of the flue module 6, the flue production mold 100 can be placed on the low-frequency vibration platform 7. When the flue module 6 molding material is poured into the mold cavity 4, the gas inside the material is discharged outward due to the low-frequency vibration and gravity, making the internal material of the flue module 6 compact after molding, and the bearing capacity is stronger than before the exhaust, and it is less likely to crack, and the surface quality is better, and demoulding is easier. Of course, if the area of ​​the low-frequency vibration platform 7 is large enough, such as Figure 5 As shown, multiple flue production molds 100 can be placed at one time to meet the needs of mass production. In the production process, only one person is still needed to complete it, and the labor cost of production does not increase synchronously with the increase in output.

[0064] Therefore, using the flue production mold 100 to produce the flue module 6 provides superior quality, higher production efficiency, and easier mold operation compared to existing manual mold production methods. Furthermore, compared to existing custom equipment, the flue module 6 can be produced using only the first mold 1, the second mold 2, and the base plate 3, in conjunction with mature and commonly used equipment such as a low-frequency vibration platform 7, a concrete mixer, and a pouring machine. This reduces initial investment and production costs.

[0065] In this embodiment, in order to ensure that the first body 11 and the second body 21 are coaxially arranged and more convenient during installation. Figure 6 As shown, the bottom plate 3 includes a base 30 , and an outer limiting frame 31 and an inner limiting frame 32 provided on the base 30 .

[0066] Specifically, the first boss 13 is provided with an outer positioning surface 132, and the outer limit frame 31 is fitted and connected to the outer positioning surface 132. The second boss 23 is provided with an inner positioning surface 232, and the inner limit frame 32 is fitted and connected to the inner positioning surface 232. During installation, the outer positioning surface 132 of the first mold 1 is first fitted and connected to the outer positioning surface 132, and then the first fixing surface 131 is abutted against the base plate 3 by plugging. Similarly, when the second mold 2 needs to be placed, the inner positioning surface 232 is fitted and connected to the inner limit frame 32, and the second fixing surface 231 is abutted against the base plate 3 by plugging. Through the above-mentioned settings, personnel do not need to have quite professional production capabilities, and can produce high-quality flue modules 6 through the flue production mold 100. The use threshold is low and training is simpler.

[0067] The above structure can further ensure the accuracy of the flue module 6 during production, thereby ensuring the verticality and horizontality of the flue module 6 during installation, and improving the assembly efficiency of the flue module 6.

[0068] In this embodiment, the inner limit frame 32 and the outer limit frame 31 are protruded from the base 30, and the outer limit frame 31 protrudes higher than the inner limit frame 32. The outer positioning surface 132 is located on the side of the first boss 13 away from the second mold 2, and the inner positioning surface 232 is located on the side of the second boss 23 away from the first mold 1.

[0069] Because the first mold 1 is located outside the second mold 2, it is more susceptible to external forces that could cause it to shift. Therefore, the outer limit frame 31 protrudes higher than the inner limit frame 32 to ensure that the first mold 1 is more stable than the second mold 2. The location of the outer positioning surface 132 and the inner positioning surface 232 avoids the cavity 4 of the flue production mold 100, resulting in a better molding effect within the cavity 4 and making the flue production mold 100 easier to manufacture.

[0070] In some embodiments, the second mold 2 further includes a handle portion 24, which is formed by extending the end of the second body 21 away from the bottom plate 3 in a direction away from the first mold 1. Figure 4 Based on Figure 7 During installation or demolding, the fingers can contact the handle 24 and pull it away from the base plate 3, thereby moving the second mold 2. In this embodiment, the handle 24 is a plate made of the same material as the second body 21 and is fixed to the second body 21 by welding. In other embodiments, the handle 24 can also be a commonly used handle or grip, or a lifting ring can be added to the upper end of the handle 24 for connecting to a lifting device to facilitate installation and demolding of the second mold 2.

[0071] In some embodiments, the first body 11, the second body 21 and the second boss 23 are respectively square or circular. The square or circular structure mainly depends on the specific shape of the flue module 6, such as Figure 8 As shown, in this embodiment, the first body 11, second body 21, and second boss 23 are all square in structure. The square structure is currently the most commonly used configuration for flue modules 6. A circular structure, on the other hand, achieves a larger cross-sectional area with less material. In other embodiments, the first body 11 is square in structure, while the second body 21 and second boss 23 are both circular in structure. The resulting flue module 6 has a circular interface, making it easier to install and providing a stronger load-bearing capacity at the interface.

[0072] For a more convenient description below, the end of the mold cavity 4 away from the bottom plate 3 is referred to as a pouring port 41 .

[0073] Specifically, such as Figure 9As shown, at the pouring port 41, the edges of the first body 11 and the second body 21 are flush. After the molding material solidifies, what is formed at the pouring port 41 is one of the connecting ends of the flue module 6. To ensure that the edges of the first body 11 and the second body 21 are flush, after the molding material fills the mold cavity 4, tools such as scrapers and scrapers can be used to perform leveling work to ensure the verticality of the flue module 6 on this surface. Similarly, the side of the first boss 13 facing away from the base plate 3 is the receiving molding surface 133, and the receiving molding surface 133 is perpendicular to the first body 11. The receiving molding surface 133 is the molding position of the other end face when the flue module 6 is spliced. It is guaranteed by the shape of the mold itself, and the verticality of the flue module 6 during installation is further improved. After multiple flue modules 6 are installed, the verticality and horizontality deviation of the flue as a whole are small, and there is no need to perform multiple corrections during installation, which improves installation efficiency and saves manpower.

[0074] Since the first body 11 and the second body 21 are coaxially arranged, for the convenience of subsequent description, the axis is the central axis Z, which is also the central axis of the flue module 6 after molding.

[0075] See Figure 9-10 More specifically, in any cross section passing through the central axis Z, the distance from the pouring port 41 to the central axis Z is greater than the distance from the first boss 13 to the central axis Z. Figure 9 In the figure, t1 is the distance from the pouring port 41 to the central axis Z, and t2 is the distance from the first boss 13 to the central axis Z. When t1 is greater than t2, since the molding surfaces of the flue module 6 at the pouring port 41 and the first boss 13 away from the central axis Z are coplanar, the width of the molded flue module 6 at the end of the pouring port 41 is relatively narrower than the width of the receiving molding surface 133. Figure 10 As shown, in the flue 200, the two flue modules 6 connected end to end naturally form a filling gap 63 at the joint for filling the seal. The seal can be made of sealant, elastic sealing material, etc. to ensure that the joints of adjacent flue modules 6 are airtight. The flue production mold 100 mentioned in this embodiment is used to produce the flue module 6 in combination with the steel mesh 61 and the flue main body filler 62. Compared with the existing material combination of fiber material, wire mesh and cement mortar, the mechanical properties of the flue module 6 produced are greatly improved. The flue main body filler 62 can be made of concrete with smaller aggregates, or other solid-liquid mixed materials that can be used for flue main body molding.

[0076] In a commonly used embodiment, the first mold 1, the second mold 2, and the base plate 3 are welded together to form a structure of steel or iron plates. The three are welded together by the above-mentioned features, which makes the production cost low and easy to implement. The initial investment is small, and the production line can be easily changed.

[0077] When using the flue production mold 100 of this embodiment, the base plate 3 is placed on the low-frequency vibration platform 7, and the first mold 1 and the second mold 2 are fixed to the base plate 3 in sequence. Specifically, the outer limit frame 31 is affixed to the outer positioning surface 132, and the inner limit frame 32 is affixed to the inner positioning surface 232. The steel mesh 61 can be placed in the mold cavity 4 during the placement of the first mold 1 and the second mold 2.

[0078] Start the low-frequency vibration platform 7 and pour the flue main body filler 62 from the pouring port 41. After the filling is full and the exhaust is completed, the flue main body filler 62 of the pouring port 41 is scraped flat, and the flue module 6 is waited for solidification, and finally the solidified flue module 6 is demoulded.

[0079] To demold, the second mold 2 can be removed by pulling on its handle 24. The first mold 1 can be removed by flipping and knocking. Alternatively, if the first mold 1 is made of multiple pieces, it can be disassembled for demolding. In some embodiments, the outside of the first mold 1 can also be equipped with handles or rings to assist in flipping and facilitate demolding and transportation. Due to the large number of possible accessories, they are not described in detail here.

[0080] In other embodiments, the first mold 1, the second mold 2, and the base plate 3 can be made of plastic. The flue production mold 100 produced in this manner can achieve millimeter-level accuracy. Considering the solidification shrinkage characteristics of the flue body filler 62 of the flue module 6, the flue module 6 produced using the flue production mold 100 made of plastic has better molding accuracy than the aforementioned method of welding steel or iron plates.

[0081] In addition, compared with existing mechanical equipment molding, it only needs to consider the shape error without considering the positioning accuracy and repeat positioning accuracy of the mechanical equipment during operation, and the produced flue module 6 has better dimensional stability.

[0082] In summary, a mold cavity with fixed size is formed by the first mold, the second mold and the base plate, so that the shape of the flue module is accurate and the error is small, thereby ensuring the accuracy, verticality and horizontality of the flue module installation process.

[0083] Secondly, in actual use, the first and second molds are set above the base plate. During the production process, assembly or disassembly requires only one person, or with the help of a lifting device, to complete the use of the flue production mold. The operation is simple and easy to use, and the flue module production efficiency is high.

[0084] Thirdly, the manufacturing cost of the flue production mold is low, and it can be used with commonly used equipment such as concrete vibrators, concrete mixers, and pouring machines. While the production quality of the flue module is guaranteed, there is no need to hire a large number of professional workers or purchase special molding equipment. The initial investment is small and the production cost of the flue module is low.

[0085] Furthermore, operators only need simple production training and safety education to begin production. Compared to existing manual or mechanical production methods using molds, this method offers a low barrier to entry, a guaranteed yield rate, and a promising future for widespread adoption. Furthermore, increasing flue module production can be achieved by simply increasing the number of flue production molds, without requiring a proportional increase in other equipment or manpower. This can further reduce the unit cost of flue modules during mass production.

[0086] The flue module produced by the flue production mold described in this embodiment has self-formed ports at both ends, which can connect two identical flue modules end to end, and seal the joints with sealant, so that the flue module can be made shorter and smaller, making production easier. During transportation and installation, safety is significantly improved. During installation, only 1-2 installers with simple training are required to complete the installation of the flue module. Compared with the existing construction requirements of 5-6 experienced and well-coordinated personnel, the installation difficulty and cost are greatly reduced, and the installation efficiency is improved.

[0087] Example 2

[0088] See Figure 11-12 The flue production mold 100 of this embodiment is based on the first embodiment and includes a hopper 5. Specifically, the hopper 5 includes a first plugging edge 51 and a second plugging edge 52 that are plugged into the pouring port 41. The first plugging edge 51 is attached to the first body 11 and extends an outer guide plate 53 obliquely away from the second mold 2. The second plugging edge 52 is attached to the second body 21 and extends an inner guide plate 54 obliquely away from the first mold 1. The outer guide plate 53 and the inner guide plate 54 form a bell-shaped structure, allowing the flue body filler 62 to be poured into the mold cavity 4 in large quantities and quickly, thereby improving production efficiency.

[0089] Furthermore, the hopper 5 further includes a connecting plate 55 that connects and fixes the inner guide plate 54 and the outer guide plate 53. In this embodiment, since the first body 11 and the second body 21 both adopt a square structure, the hopper 5 in this embodiment also has a square structure. Figure 11 As shown, the connecting plate 55 is provided between the inner guide plate 54 and the outer guide plate 53. The addition of the connecting plate 55 can make the hopper 5 integral, and the overall lifting and movement of the hopper 5 can be completed by lifting the connecting plate 55.

[0090] In actual use, only one hopper 5 is needed, in conjunction with a pouring pipe or pouring gun for pouring the flue body filler 62, to complete the pouring work of multiple flue production molds 100. In some embodiments, the inner guide plate 54 is also provided with a lifting ring or hook for lifting to reduce the physical exertion of personnel during production.

[0091] Example 3

[0092] See Figure 13 . The flue production mold 100 of this embodiment is similar to that in Example 1, except that the first main body 11 is a square structure, while the second main body 21 and the second boss 23 are circular structures. The flue modules 6 produced by the flue production mold 300 with a circular structure are spliced ​​with higher efficiency. The area of ​​the receiving molding surface 133 is also increased, and the produced flue module 6 has better bearing capacity at the splicing point. During production, since the second main body 21 and the second boss 23 are circular structures, the corresponding inner limit frame 32 is also a circular structure or a quasi-circular structure. There is no need to align the second mold 2 and the base plate 3 when connecting and installing it, which is faster and easier.

[0093] The above content is merely an example and illustration of the structure of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these obvious alternative forms are all within the scope of protection of the present invention.

Claims

1. A flue production mold, characterized in that: include: A first mold (1) comprises a first main body (11) and a first boss (13), wherein a cavity (12) is formed around the interior of the first main body (11), the first boss (13) is formed by vertically extending one end of the first main body (11) toward the cavity (12), and the first boss (13) is provided with a first fixing surface (131); A second mold (2) is detachably disposed in the cavity (12), the second mold (2) comprising a second main body (21), a draft portion (22), and a second boss (23); the draft portion (22) is formed by bending an end of the second main body (21) close to the first boss (13) obliquely toward the cavity (12); a second boss (23) is provided at the end of the draft portion (22), and the second boss (23) is provided with a second fixing surface (231); and a bottom plate (3); The first main body (11) and the second main body (21) are coaxially arranged; the first fixing surface (131) and the second fixing surface (231) are respectively in contact with the bottom plate (3).

2. The flue production mold according to claim 1, characterized in that: The bottom plate (3) comprises a base (30), and an outer limit frame (31) and an inner limit frame (32) provided on the base (30); The first boss (13) is provided with an outer positioning surface (132), and the outer limit frame (31) is closely connected to the outer positioning surface (132).

3. The flue production mold according to claim 2, characterized in that: The second boss (23) is provided with an inner positioning surface (232), and the inner limit frame (32) is closely connected to the inner positioning surface (232).

4. The flue production mold according to claim 3, characterized in that: The inner limit frame (32) and the outer limit frame (31) are protruded on the base (30), and the protruding height of the outer limit frame (31) is higher than that of the inner limit frame (32); the outer positioning surface (132) is located on the side of the first boss (13) away from the second mold (2), and the inner positioning surface (232) is located on the side of the second boss (23) away from the first mold (1).

5. The flue production mold according to claim 3, characterized in that: The second mold (2) further comprises a handle portion (24), and the handle portion (24) is formed by extending from the end of the second body (21) away from the bottom plate (3) in a direction away from the first mold (1).

6. The flue production mold according to claim 3, characterized in that: The first main body (11), the second main body (21) and the second boss (23) are respectively square structures or circular structures; the space surrounded by the first mold (1), the second mold (2) and the base plate (3) is a mold cavity (4), and the end of the mold cavity (4) away from the base plate (3) is a pouring port (41).

7. The flue production mold according to claim 6, characterized in that: At the pouring port (41), the edges of the first body (11) and the second body (21) are flush; the side of the first boss (13) facing away from the bottom plate (3) is a receiving molding surface (133), and the receiving molding surface (133) is perpendicular to the first body (11).

8. The flue production mold according to claim 7, characterized in that: The first body (11) and the second body (21) share a central axis Z. In any cross-section passing through the central axis Z, the distance from the pouring port (41) to the central axis Z is greater than the distance from the first boss (13) to the central axis Z.

9. The flue production mold according to claim 6, characterized in that: The invention also includes a hopper (5), wherein the hopper (5) includes a first plugging edge (51) and a second plugging edge (52) plugged into the pouring port (41), wherein the first plugging edge (51) is attached to the first main body (11) and extends an outer guide plate (53) in a direction away from the second mold (2); and the second plugging edge (52) is attached to the second main body (21) and extends an inner guide plate (54) in a direction away from the first mold (1).

10. The flue production mold according to claim 9, characterized in that: The hopper (5) further comprises a connecting plate (55) for connecting and fixing the inner guide plate (54) and the outer guide plate (53).

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