Die baking device of high-pressure casting die

Abstract

The utility model provides a mold baking device of a high-pressure casting mold, and relates to the technical field of high-pressure casting. The material guide pipe is used for conveying fuel and combustion-supporting gas to an inner cavity of the high-pressure casting mold; the combustion head is connected with the material guide pipe, and the combustion head is placed in an inner cavity of a high-pressure casting mold when being used; the ignition device is used for igniting fuel and heating the inner wall of the high-pressure casting mold; the material guide pipe comprises a material guide main pipe and at least two groups of material guide branch pipes, each group of material guide branch pipes are communicated with the material guide main pipe, and the combustion heads are arranged on the material guide branch pipes; the pipeline paths of each group of material guide branch pipes and the distribution positions of the combustion heads are the same; and the positions of communication nodes of each group of material guide branch pipes and the material guide main pipe are the same. The preheating device is used for uniformly preheating the high-pressure casting mold.

Description

Technical Field

[0001] The present application relates to the field of high-pressure casting, and particularly to a baking device for a high-pressure casting mold. Background Art

[0002] High-pressure casting refers to a casting method in which liquid or semi-solid metal or alloy, or liquid metal or alloy containing a reinforcing phase, is filled into the cavity of a die-casting mold at a high speed under high pressure, and the metal or alloy solidifies under pressure to form a casting. The commonly used pressure during die-casting is 4 - 500 MPa, the metal filling speed is 0.5 - 120 m / s, and the filling time is about 0.01 - 0.2 seconds (which varies depending on the size of the casting), and it is generally used for casting non-ferrous alloys.

[0003] Before production, the high-pressure casting mold needs to be preheated to a certain temperature. Currently, medium and large-sized die-casting machines are all equipped with mold temperature control machines to heat the high-pressure casting mold, which has a high cost. However, for small die-casting machines, either hot mold parts are produced to heat the temperature, or an old-fashioned baking device is used to heat the high-pressure casting mold. Using hot mold parts to heat the mold requires producing twenty to thirty moldings of products to reach the production temperature, which reduces production efficiency and causes waste of raw materials. The simple and old-fashioned baking device has a complex pipeline structure and a high production cost; moreover, there are differences in the feeding amounts of each burner, and the temperatures of each flame point are different, resulting in uneven temperature of the high-pressure casting mold, and further reducing the service life of the high-pressure casting mold.

[0004] To implement the company's production concept of cost reduction and efficiency improvement, it is necessary to develop a baking device with a simple structure and more uniform heating temperature. Utility Model Content

[0005] The purpose of the present application is to address the above problems and provide a baking device for a high-pressure casting mold to ensure uniform preheating of each area of the high-pressure casting mold.

[0006] The baking device for a high-pressure casting mold provided by the present application is used to transport fuel into the inner cavity of the high-pressure casting mold and ignite it to preheat the high-pressure casting mold, and includes:

[0007] A material guiding pipe for transporting fuel and combustion-supporting gas to the inner cavity of the high-pressure casting mold;

[0008] A burner connected to the material guiding pipe, and the burner is placed in the inner cavity of the high-pressure casting mold during use; it is used to ignite the fuel and heat the inner wall of the high-pressure casting mold;

[0009] The material guiding pipe includes a main material guiding pipe and at least two groups of material guiding branch pipes. Each group of material guiding branch pipes is communicated with the main material guiding pipe, and the burner is arranged on the material guiding branch pipe; the pipeline paths of each group of material guiding branch pipes and the distribution positions of the burners are the same; and the positions of the connection nodes of each group of material guiding branch pipes and the main material guiding pipe are the same.

[0010] According to the technical solution provided by the embodiment of the present application, each of the material guiding branch pipes includes a connecting pipe and a support pipe;

[0011] The connecting pipe communicates the support pipe with the main material guiding pipe;

[0012] The support pipe has at least two pipeline ports arranged at intervals, and each pipeline port communicates with the connecting pipe, and each pipeline port is provided with one of the burner heads.

[0013] According to the technical solution provided by the embodiment of the present application, the support pipe is a centrosymmetric structure, and the connecting pipe communicates with the support pipe at the symmetric center of the support pipe.

[0014] According to the technical solution provided by the embodiment of the present application, it further includes a runner branch pipe; the runner branch pipe communicates with the main material guiding pipe, and at least one burner head is arranged on the runner branch pipe for spraying fire to heat the runner of the high-pressure casting mold.

[0015] According to the technical solution provided by the embodiment of the present application, the positions of the connection nodes of the runner branch pipe and the material guiding branch pipe with the main material guiding pipe are the same.

[0016] According to the technical solution provided by the embodiment of the present application, the main material guiding pipe includes:

[0017] A material conveying pipe for conveying fuel;

[0018] A material conveying control valve arranged on the material conveying pipe for regulating the size of the fuel flow rate;

[0019] An air conveying pipe for conveying combustion-supporting gas;

[0020] An air conveying control valve arranged on the air conveying pipe for regulating the size of the combustion-supporting gas flow rate;

[0021] A mixing pipe for conveying a mixture of fuel and combustion-supporting gas; the material conveying pipe and the air conveying pipe are connected to each group of the material guiding branch pipes through the mixing pipe.

[0022] According to the technical solution provided by the embodiment of the present application, a boosting mixing mechanism is arranged on the mixing pipe for fully mixing fuel and combustion-supporting gas and enhancing the combustion rate at the burner head.

[0023] According to the technical solution provided by the embodiment of the present application, the boosting mixing mechanism has a mixing chamber, and the mixture flow in the mixing pipe flows through the mixing chamber and then flows out; the cross-sectional area of the mixing chamber is larger than that of the mixing pipe, and the mixing chamber provides a larger mixing space compared with the mixing pipe, which is convenient for the full mixing of fuel and combustion-supporting gas.

[0024] According to the technical solution provided by the embodiment of the present application, the mixing chamber has an inlet and an outlet, and the cross-section of the outlet is smaller than that of the mixing chamber; without changing the flow rate of the mixture, increasing the flow rate of the mixture at the outlet facilitates the full mixing of the fuel and the combustion-supporting gas.

[0025] According to the technical solution provided by the embodiment of the present application, the baking device of the high-pressure casting mold further includes a temperature detection device and a display that is signal-connected thereto;

[0026] The temperature detection device is arranged inside the wall of the high-pressure casting mold and is used to detect the temperature in the middle area in the thickness direction of the wall.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows:

[0028] The baking device of the high-pressure casting mold provided by the present application includes a material guiding pipe and a burner head; the material guiding pipe includes a main material guiding pipe and at least two groups of material guiding branch pipes, and each group of the material guiding branch pipes is communicated with the main material guiding pipe, and the burner head is arranged on the material guiding branch pipe; the pipe paths of each group of the material guiding branch pipes and the distribution positions of the burner heads are the same; and the positions of the communication nodes of each group of the material guiding branch pipes and the main material guiding pipe are the same.

[0029] Advantage 1: The structures of each group of the material guiding branch pipes are the same, which can realize mass production and has low production cost. Advantage 2: During use, when a group of the material guiding branch pipes is damaged, replacing the damaged group of the material guiding branch pipes can complete the repair. The maintenance process is simple and efficient, and the influence on the production line operation is reduced; in addition, after a group of the removed material guiding branch pipes is repaired, it can also be used as a spare part for recycling. Advantage 3: The pipe paths of each group of the material guiding branch pipes and the distribution positions of the burner heads are the same, that is, the fuel consumption efficiency of each group of the material guiding branch pipes is the same. The positions of the communication nodes of each group of the material guiding branch pipes and the main material guiding pipe are the same, that is, the pressures at the communication nodes of each group of the material guiding branch pipes are the same; and because the pipe diameters at the communication nodes of each group of the material guiding branch pipes are the same, and the fuel consumption efficiency of each group of the material guiding branch pipes is the same; it is ensured that the combustion intensities of each group of the material guiding branch pipes are the same, that is, uniform heating of different areas of the high-pressure casting mold is realized.

[0030] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a baking mold device for a high-pressure casting mold provided by an embodiment of the present application;

[0033] Figure 2 It is a schematic structural diagram of a main material guiding pipe provided by an embodiment of the present application;

[0034] Figure 3 It is a schematic structural diagram of a branch material guiding pipe provided by an embodiment of the present application.

[0035] The text markings in the figure are indicated as:

[0036] 1, burner head; 2, main material guiding pipe; 21, material conveying pipe; 22, material conveying control valve; 23, gas conveying pipe; 24, gas conveying control valve; 25, mixing pipe; 3, branch material guiding pipe; 31, connecting pipe; 32, support pipe; 4, runner branch pipe; 5, boosting mixing mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present application. Specifically, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work shall fall within the protection scope of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] As Figure 1 shown, as mentioned in the background art, in view of the problems in the prior art, the baking device for a high-pressure casting mold provided in this embodiment includes a material guiding pipe and a burner 1; the material guiding pipe includes a main material guiding pipe 2 and at least two groups of material guiding branch pipes 3, and each group of material guiding branch pipes 3 is communicated with the main material guiding pipe 2, and the burner 1 is arranged on the material guiding branch pipe 3; the pipeline paths of each group of material guiding branch pipes 3 and the distribution positions of the burners 1 are the same; and the positions of the connection nodes of each group of material guiding branch pipes 3 and the main material guiding pipe 2 are the same. Among them, the material guiding pipe adopts a rigid pipeline. During use, the end of the material guiding pipe provided with the burner 1 is placed in the inner cavity of the high-pressure casting mold to be preheated, and the end of the material guiding pipe protruding from the high-pressure casting mold is placed and fixed on the collet of the die casting machine. Under the support of the material guiding pipe, a certain distance is maintained between each burner 1 and the inner wall of the high-pressure casting mold, and the size of the distance is specifically adjusted according to the combustion condition at the burner 1.

[0040] Advantage 1: The structures of the guiding material branch pipes 3 in each group are the same, enabling mass production and low production costs. Advantage 2: During use, when a guiding material branch pipe 3 is damaged, replacing the damaged guiding material branch pipe 3 in that group can complete the repair. The maintenance process is simple and efficient, minimizing the impact on the production line operation. Additionally, after repairing a removed group of guiding material branch pipes 3, they can be recycled as spare parts. Advantage 3: The pipeline paths of the guiding material branch pipes 3 in each group and the distribution positions of the burner heads 1 are the same, that is, the fuel consumption efficiency of the guiding material branch pipes 3 in each group is the same. The positions of the connection nodes between each group of guiding material branch pipes 3 and the guiding material main pipe 2 are the same, that is, the pressures at the connection nodes of each group of guiding material branch pipes 3 are the same. Also, since the pipe diameters at the connection nodes of each group of guiding material branch pipes 3 are the same, and the fuel consumption efficiency of each group of guiding material branch pipes 3 is the same, the combustion intensities of each group of guiding material branch pipes 3 are the same, that is, uniform heating of different regions of the high-pressure casting mold is achieved.

[0041] In a preferred embodiment, the mold baking device of the high-pressure casting mold further includes a runner branch pipe 4. The runner branch pipe 4 is connected to the guiding material main pipe 2, and at least one burner head 1 is provided on the runner branch pipe 4 for spraying fire to heat the runner of the mold. This can ensure that the mold gate and the injection chamber can also quickly reach the mold temperature, reducing the cold shut defect in the die-cast product.

[0042] Optionally, the positions of the connection nodes between the runner branch pipe 4 and the guiding material branch pipes 3 and the guiding material main pipe 2 are the same, that is, the pressures at the inlets of the runner branch pipe 4 and each group of guiding material branch pipes 3 are the same, which can ensure that the feeding conditions of the runner branch pipe 4 and each group of guiding material branch paths are basically the same. Thus, the combustion intensities at the burner heads 1 on the runner branch pipe 4 and each group of guiding material branch pipes 3 are basically the same, improving the uniformity of the preheating temperature of the casting cavity and the runner of the high-pressure casting mold.

[0043] As Figure 3 shown, in a preferred embodiment, the guiding material branch pipe 3 includes a connecting pipe 31 and a support pipe 32. The connecting pipe 31 connects the support pipe 32 to the guiding material main pipe 2. The support pipe 32 has at least two spaced-apart pipeline ports (the pipeline ports mentioned in this application document are the breaks of the pipeline), and each pipeline port is connected to the connecting pipe 31, and one burner head 1 is provided at each pipeline port. Installing multiple burner heads 1 on the support pipe 32 can effectively increase the heating area. Further, the support pipe 32 is a centrosymmetric structure, and the connecting pipe 31 is connected to the support pipe 32 at the symmetric center of the support pipe 32. The burner heads 1 in the same group of guiding material branch pipes 3 are centrosymmetrically distributed about the symmetric center of the support pipe 32 (i.e., the connecting pipe 31). The fuel supply states of two burner heads 1 that are centrosymmetric about the connecting pipe 31 are the same, and the combustion intensities of the flames are also the same, enhancing the uniformity of the preheating of the high-pressure casting mold. The support pipe 32 can adopt, but is not limited to, pipeline architectures such as the Chinese character "feng" shape and the Chinese character "gong" shape.

[0044] In addition, to further enhance the uniformity of preheating of the high-pressure die casting mold, the pipeline path of the support pipe 32 and the arrangement of the burner heads 1 thereon can be further adjusted. In the same group of material guiding branch pipes 3, the path lengths from each burner head 1 to the connecting pipe 31 are the same, so that the combustion intensities of the burner heads 1 in the same group are more uniform. The combustion principle is referred to the third advantage of the above high-pressure die casting mold and will not be specifically elaborated here. On the basis of ensuring the uniformity of combustion intensity between groups of the material guiding branch pipes 3, strengthening the combustion uniformity of the burner heads 1 within a single group can further enhance the heat reception uniformity of the high-pressure die casting mold. Specifically, the support pipe 32 can adopt an I-shaped structure with equal lengths up and down, or increase the path length of the middle cross bar of the lengthened cross-shaped structure.

[0045] In a preferred embodiment, a group of material guiding branch pipes 3 includes only one connecting pipe 31 and does not have a support pipe 32; one end of the connecting pipe 31 is communicated with the material guiding main pipe 2, and the other end of the connecting pipe is communicated with the burner head 1; the material guiding main pipe 2 and each group of material guiding branch pipes 3 are in a dandelion shape as a whole, which can further ensure that the combustion intensities of the burner heads 1 are the same.

[0046] As Figure 2 shown, in a preferred embodiment, the material guiding main pipe 2 includes: a material conveying pipe 21, a material conveying control valve 22, an air conveying pipe 23, an air conveying control valve 24, and a mixing pipe 25. The material conveying pipe 21 is used for conveying fuel; specifically, the material conveying pipe 21 is used for conveying gaseous fuel; or, the material conveying pipe 21 is used for conveying liquid fuel. At this time, an atomizing nozzle is provided at the connection node between the material conveying pipe 21 and the mixing pipe 25 to atomize the liquid fuel in the material conveying pipe 21 and then introduce it into the mixing pipe 25. The material conveying control valve 22 is arranged on the material conveying pipe 21 and is used for regulating the size of the fuel flow rate. The air conveying pipe 23 is used for conveying combustion-supporting gas; the combustion-supporting gas is preferably but not limited to compressed air. Using compressed air as the combustion-supporting gas has good economy and safety. The air conveying control valve 24 is arranged on the air conveying pipe 23 and is used for regulating the size of the combustion-supporting gas flow rate. The mixing pipe 25 is used for conveying the mixture of fuel and combustion-supporting gas; the material conveying pipe 21 and the air conveying pipe 23 are connected to each group of material guiding branch pipes 3 through the mixing pipe 25. According to the preheating temperature requirement of the high-pressure die casting mold, the ratio of fuel and combustion-supporting gas and the size of the mixture flow rate of fuel and combustion-supporting gas can be changed by adjusting the material conveying control valve 22 and the air conveying control valve 24, so as to regulate the flame temperature at the burner head 1.

[0047] In a preferred embodiment, the baking device of the high-pressure casting mold further includes a temperature detection device and a display that is signal-connected thereto; the temperature detection device is disposed inside the wall of the high-pressure casting mold and is used to detect the temperature of the middle region in the thickness direction of the wall. The temperature of the surface layer of the inner wall of the high-pressure casting mold changes rapidly after being heated by the burner 1 and is not sufficient to reflect the overall preheating state of the high-pressure casting mold. In addition, the wall of the high-pressure casting mold is relatively thick. When heating the inner wall of the high-pressure casting mold, the temperature change of the outer wall of the high-pressure casting mold is slow and cannot reflect the preheating state of the high-pressure casting mold in a timely manner. Therefore, the preheating state of the high-pressure casting mold is reflected by detecting the middle region in the thickness direction of the wall of the high-pressure casting mold. It should be noted that during the production of the high-pressure casting mold, the temperature detection device should be embedded in the wall of the high-pressure casting mold. The display is signal-connected to the temperature detection device and real-time feedbacks the temperature data detected by the temperature detection device. The staff can adjust the material input control valve 22 and the gas input control valve 24 according to the data fed back by the display, change the input state of the fuel and the combustion-supporting gas, and then adjust the temperature of the flame; or, when it is observed through the display that the high-pressure casting mold reaches the predetermined temperature, the material input control valve 22 and the gas input control valve 24 are closed to end the preheating.

[0048] In a preferred embodiment, a boosting mixing mechanism 5 is provided on the mixing pipe 25 to fully mix the fuel and the combustion-supporting gas and enhance the combustion rate at the burner 1.

[0049] The boosting mixing mechanism 5 can be selected but is not limited to a mixing chamber, and the mixture in the mixing pipe 25 flows through the mixing chamber and then flows out. On the one hand, the cross-sectional area of the mixing chamber is larger than that of the mixing pipe 25. The mixing chamber provides a larger mixing space compared with the mixing pipe 25, which is convenient for the fuel and the combustion-supporting gas to be fully mixed. On the other hand, the mixing chamber has an inlet and an outlet, and the cross-sectional area of the outlet is smaller than that of the mixing chamber; without changing the flow rate of the mixture, when the mixture flows out from the outlet of the mixing chamber, since the cross-sectional area at the outlet is relatively reduced with respect to the chamber of the mixing chamber, the flow rate of the mixture at the outlet of the mixing chamber will increase. After the flow rate increases, it is convenient for the fuel and the combustion-supporting gas in the mixture to be fully mixed.

[0050] Optionally, a flow disturbance protrusion is added in the mixing chamber to disturb the air flow in the mixing chamber and make the fuel and air in the mixing chamber fully mixed.

[0051] Optionally, flow guiding plates are alternately added up and down in the mixing chamber to make the fuel and combustion-supporting gas mixture flow through the mixing chamber along an S-shaped path, extend the flow path of the mixture, and make the fuel and the mixture more fully mixed. Further, increasing the number of flow guiding plates and reducing the spacing between adjacent flow guiding plates can further increase the flow rate of the fuel and combustion-supporting gas mixture and extend the flow path of the mixture, making the fuel and the mixture more fully mixed.

[0052] Optionally, a plurality of boosting mixing mechanisms 5 are installed in series on the mixing pipe 25 to enhance the mixing degree of fuel and combustion-supporting gas.

[0053] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application. The above are only the preferred implementation manners of the present application. It should be noted that due to the limited nature of literal expression and the objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements, modifications or variations can be made, or the above technical features can be combined in an appropriate manner; these improvements, modifications, variations or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present application.

Claims

1. A baking mold device for a high-pressure casting mold, used for delivering fuel to the inner cavity of the high-pressure casting mold and igniting it to preheat the high-pressure casting mold, characterized in that: include: The material guide pipe is used to transport the fuel and the combustion-supporting gas to the inner cavity of the high-pressure casting mold; A burner head (1) connected to the material guide pipe, the burner head (1) being placed in the inner cavity of the high-pressure casting mold when in use, and being used to ignite the fuel and heat the inner wall of the high-pressure casting mold; The material guide pipe comprises a material guide main pipe (2) and at least two groups of material guide branch pipes (3); each group of the material guide branch pipes (3) is connected to the material guide main pipe (2); the burner head (1) is arranged on the material guide branch pipe (3); the pipeline paths of each group of the material guide branch pipes (3) and the distribution positions of the burner heads (1) are the same; and the positions of the connection nodes of each group of the material guide branch pipes (3) and the material guide main pipe (2) are the same.

2. The baking mold device for high pressure casting mold according to claim 1, characterized in that: Each group of the material guiding branch pipes (3) comprises a connecting pipe (31) and a support pipe (32); The connecting pipe (31) connects the support pipe (32) with the material guiding main pipe (2); The support pipe (32) has at least two pipeline ports spaced apart from each other, and each pipeline port is connected to the connecting pipe (31), and each pipeline port is provided with a burner head (1).

3. The baking mold device for high pressure casting mold according to claim 2, characterized in that: The support tube (32) is a centrally symmetrical structure, and the connecting tube (31) is connected to the support tube (32) at the symmetrical center of the support tube (32).

4. The baking mold device for high pressure casting mold according to claim 1, characterized in that: It also comprises a runner branch pipe (4); the runner branch pipe (4) is connected to the material guide main pipe (2); at least one burner head (1) is arranged on the runner branch pipe (4) for spraying fire to heat the runner of the high-pressure casting mold.

5. The baking mold device for high pressure casting mold according to claim 4, characterized in that: The positions of the connection nodes of the pouring channel branch pipe (4) and the material guide branch pipe (3) and the material guide main pipe (2) are the same.

6. The baking mold device for high pressure casting mold according to claim 1, characterized in that: The material guide main pipe (2) comprises: A fuel delivery pipe (21) for delivering fuel; A fuel delivery control valve (22), arranged on the fuel delivery pipe (21), for regulating the size of the fuel flow; A gas delivery pipe (23) for delivering combustion-supporting gas; A gas delivery control valve (24) is provided on the gas delivery pipe (23) and is used to adjust the flow rate of the combustion-supporting gas; The mixing tube (25) is used to transport a mixture of fuel and combustion-supporting gas; the material delivery tube (21) and the gas delivery tube (23) are connected to each group of the material guide branch tubes (3) through the mixing tube (25).

7. The baking mold device for high pressure casting mold according to claim 6, characterized in that: The mixing tube (25) is provided with a booster mixing mechanism (5) for fully mixing the fuel and the combustion-supporting gas, thereby enhancing the combustion rate at the combustion head (1).

8. The baking mold device for high pressure casting mold according to claim 7, characterized in that: The power-assisted mixing mechanism (5) has a mixing chamber, and the mixture in the mixing tube (25) flows through the mixing chamber and flows out; the cross-section of the mixing chamber is larger than the cross-section of the mixing tube (25), and the mixing chamber provides a larger mixing space than the mixing tube (25), so as to facilitate the full mixing of the fuel and the combustion-supporting gas.

9. The baking mold device for high pressure casting mold according to claim 8, characterized in that: The mixing chamber has an inlet and an outlet, and the cross section of the outlet is smaller than the cross section of the mixing chamber; without changing the flow rate of the mixture, the flow velocity of the mixture at the outlet is increased to facilitate full mixing of the fuel and the combustion-supporting gas.

10. The baking mold device for high pressure casting mold according to claim 8, characterized in that: It also includes a temperature detection device and a display connected to its signal; The temperature detection device is arranged inside the wall of the high-pressure casting mold and is used to detect the temperature of the middle area in the thickness direction of the wall.

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