Die-casting die for producing aero-engine cylinder body

Abstract

The utility model relates to a die-casting die for producing an aero-engine cylinder block, which comprises a first die body and a second die body which can be matched with each other to form a die-casting die cavity, and the first die body and the second die body are arranged on a table top limited by a mounting base through a supporting assembly; an adjustable blocking assembly capable of blocking the injection port and an exhaust and pressure return assembly capable of exhausting gas in the die-casting die cavity before injection molding and pressurizing and refilling the die-casting die cavity after injection molding are inserted into the surface of the first die body; cooling assemblies capable of accelerating solidification of metal melt in the die-casting die cavity are inserted into the surface of the first die body and the surface of the second die body at intervals. According to the utility model, the die-casting die cavity can be exhausted in advance so as to ensure the vacuum degree and the liquid injection sufficiency of the cavity, and meanwhile, the die cavity can be pressurized and kept in state after the injection system is separated, and the melt is recharged and compensated so as to improve the die-casting quality and strength.

Description

Technical Field

[0001] This utility model relates to the field of mold technology for the production of aircraft engine parts, and in particular to a die-casting mold for the production of aircraft engine cylinder blocks. Background Technology

[0002] Die casting, short for pressure casting, is a multifunctional and efficient metal casting process. It involves filling molten metal into a mold cavity at high speed under high pressure, and then solidifying the molten metal under pressure to form a casting defined by the mold cavity. Die casting is renowned for producing geometrically complex metal parts using reusable molds. The process involves pressing molten metal into these molds under high pressure, making it particularly suitable for mass production of parts requiring precision, repeatability, and high surface finish. Currently, with the increasing demand for high-precision metal structural components, die casting machines have become one of the main pieces of equipment for the industrial production of high-precision metal parts both domestically and internationally.

[0003] Currently, to improve the structural strength and surface quality of aero-engine cylinder blocks, die casting systems are typically used to produce cylinder block structural components with complex surface contours and high structural performance requirements, thereby obtaining high-quality cylinder block parts with complex surface geometries. In the actual production process, the die casting system uses an injection punch to push pre-molten metal into a pressure chamber, and further forces the molten metal from the pressure chamber to fill the mold cavity at high pressure and high speed. The molten metal in the mold cavity is kept under high pressure throughout the process to achieve cooling and solidification, thus obtaining die-cast metal parts that conform to the shape of the mold cavity. However, during the production process, to ensure a stable high-pressure state for the molten metal within the mold cavity and to maintain the saturation of the mold cavity during solidification, the injection punch and pressure chamber structure typically need to remain connected to the mold for a certain period. This provides a continuous and stable pressure supply and ample compensation fluid to the molten metal in the mold cavity. Consequently, the injection system, composed of the injection punch and pressure chamber structure, cannot quickly switch between multiple molds for injection. It requires a long-term stable connection with a single mold, hindering rapid switching between multiple molds to complete injection work, thus reducing the efficiency of mass die-casting production. Therefore, existing die-casting molds cannot automatically maintain high pressure and provide solidification compensation for the molten metal in the mold cavity. The mold body is prone to developing bubbles and voids after the injection system detaches, affecting product quality. Furthermore, existing die-casting molds cannot pre-extract air from the mold cavity, causing residual gas to hinder the molten metal from filling the mold cavity during die casting, thus affecting the surface quality of the formed mold body. Utility Model Content

[0004] The purpose of this invention is to provide a die-casting mold for aero-engine cylinder block production that can pre-vent the die-casting cavity to ensure the vacuum degree and sufficient liquid injection, while also pressurizing and compensating the mold cavity with melt refill after the injection system separates, thereby improving the quality and strength of die casting. This solves the problem that existing molds cannot automatically perform pressurization and melt cooling compensation of the mold cavity, requiring the injection system to be connected to the mold for a long time. This results in a longer switching cycle between molds, a decrease in switching speed, and a reduction in the efficiency of batch die casting production. Furthermore, after the injection system separates, the incompletely solidified mold body is prone to generating bubbles and pores due to pressure drop, affecting product quality and structural strength.

[0005] The technical solution adopted by this utility model is as follows: a die-casting mold for producing aero-engine cylinder blocks, including a first mold body and a second mold body that can cooperate with each other to form a die-casting mold cavity. The first mold body and the second mold body are mounted on a platform defined by a mounting base through a support assembly. An adjustable blocking assembly capable of sealing the injection port and an exhaust backpressure assembly capable of venting gas from the die-casting mold cavity before injection and pressurizing and refilling the die-casting mold cavity after injection are inserted into the surface of the first mold body and the second mold body at intervals. Cooling assemblies capable of accelerating the solidification of the molten metal in the die-casting mold cavity are also inserted into the surface of the first mold body and the second mold body at intervals.

[0006] According to a preferred embodiment, the exhaust backpressure assembly includes an insert tube, an exhaust mechanism, and a backpressure mechanism. The insert tube is inserted into the first mold body in such a way that it penetrates the first mold body and communicates with the die-casting mold cavity. The end of the insert tube away from the first mold body is also connected to an exhaust mechanism capable of extracting gas from the die-casting mold cavity. The backpressure mechanism is provided inside the insert tube and is capable of selectively cutting off its cavity and supplementing the die-casting mold cavity with additional pressure by pushing back the melt.

[0007] According to a preferred embodiment, an exhaust pipe cavity and a refill melt receiving cavity are provided in the insert tube in a coaxial manner. The exhaust pipe cavity is connected to the refill melt receiving cavity in such a way that a stepped annular surface is formed at its docking point with the refill melt receiving cavity. Furthermore, a converging tube body with an inclined inner annular surface is provided on the stepped annular surface between the exhaust pipe cavity and the refill melt receiving cavity.

[0008] According to a preferred embodiment, the exhaust mechanism includes an exhaust pipe connected to the insert tube and a vacuum pump mounted on the exhaust pipe to drive the airflow in a directional direction. A one-way exhaust valve that limits the one-way discharge of airflow is also provided in the exhaust pipe.

[0009] According to a preferred embodiment, the back pressure mechanism includes a telescopic rod inserted into the top end face of the insertion tube, a pressure block installed at the lower axial end of the telescopic rod, and a back pressure plug sleeve sleeved on the pressure block. A guide correction ring sleeve movably sleeved outside the pressure block is also connected to the upper axial end of the pressure block by a spring.

[0010] According to a preferred embodiment, the adjustable blocking assembly includes a guide tube shell, a drive rod, and a blocking block, wherein the guide tube shell extends laterally through the first mold body and is connected to the injection port of the first mold body, the drive rod is inserted into one end of the guide tube shell away from the first mold body, and one end of the drive rod inserted into the guide tube shell is connected to the blocking block embedded in the guide tube shell.

[0011] According to a preferred embodiment, a sealing gasket capable of filling the assembly gap between its cavity and the sealing block is embedded on the inner wall surface of the conductive tube shell.

[0012] According to a preferred embodiment, the support assembly includes a hydraulic lifting rod connected to an ear plate at the side corner of the first mold body and a support column supported below the second mold body.

[0013] According to a preferred embodiment, the cooling assembly includes a cooling tube detachably inserted into the first mold body and the second mold body, an inlet pipe capable of inputting coolant into a plurality of parallel cooling tubes, and an outlet pipe capable of transferring the coolant after heat absorption.

[0014] According to a preferred embodiment, a cover is provided on the main body of the cooling tube, and two pipe joints that can be respectively connected to the inlet pipe and the outlet pipe are inserted into the cover; a partition plate that can axially divide the tube cavity is also provided in the tube cavity of the main body; a heat exchange plate that can accelerate heat transfer is embedded on the end face of the main body away from the cover and close to the die-casting mold cavity.

[0015] The beneficial effects of this utility model are:

[0016] The exhaust and backpressure assembly provided in this application can pre-extract gas from the die-casting mold cavity as needed, increasing the vacuum level of the mold cavity and ensuring more complete filling of molten metal to obtain a more complete die-cast part. Furthermore, after the injection operation, the exhaust and backpressure assembly can maintain high pressure and compensate for voids in the molten metal in the die-casting mold cavity through a backpressure mechanism, further improving the integrity, structural strength, and density of the casting during filling and solidification, thus ensuring the quality of the die-cast product. The cooling assembly provided in this application can actively transfer heat from the die-casting mold cavity as needed, thereby increasing the speed and efficiency of cooling and solidification and shortening the die-casting cycle.

[0017] The insert tube provided in this application can connect to the die-casting mold cavity, allowing the venting mechanism to extract air from the mold cavity before die-casting, increasing the vacuum level of the mold cavity. This ensures sufficient subsequent injection, reduces the probability of porosity, and improves the quality and structural strength of the die-casting. The backpressure mechanism provided in this application can adjustably push a portion of the molten metal in the insert tube back into the die-casting mold cavity under pressure. This effectively maintains the pressure of the molten metal in the mold cavity during solidification after the injection system separates from the mold. Furthermore, it can compensate for condensation voids and unfilled complex cavity areas, improving the integrity and sufficiency of the mold cavity filling. This ensures that the solidified molded part has a surface profile consistent with the die-casting mold cavity and reduces defects such as porosity, significantly improving the structural strength and quality of the die-cast parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a preferred die-casting mold for producing aero-engine cylinder blocks proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the exhaust backpressure assembly of a preferred die-casting mold for producing aero-engine cylinder blocks proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of a preferred exhaust backpressure assembly of a die-casting mold for producing aero-engine cylinder blocks, as proposed in this utility model, during melt pressurization and refill compensation.

[0021] Figure 4 This is a partial structural schematic diagram of the cooling component of a preferred die-casting mold for producing aero-engine cylinder blocks, as proposed in this utility model.

[0022] List of reference numerals

[0023] 1: First mold body; 2: Second mold body; 3: Support assembly; 4: Mounting base; 5: Adjustable plugging assembly; 6: Exhaust and backpressure assembly; 7: Cooling assembly; 31: Hydraulic lifting rod; 32: Support column; 51: Conductor tube shell; 52: Drive rod; 53: Sealing block; 511: Sealing gasket; 61: Insert tube; 62: Exhaust mechanism; 63: Backpressure mechanism; 611: Exhaust pipe cavity; 612: Refill melt container 613: Tube lumen; 621: Exhaust pipe; 622: Vacuum pump; 623: One-way exhaust valve; 631: Telescopic rod; 632: Pressure block; 633: Back pressure plug sleeve; 634: Spring; 635: Guide correction ring sleeve; 71: Cooling insert; 72: Liquid inlet pipe; 73: Liquid outlet pipe; 711: Insert body; 712: Cover; 713: Pipe joint; 714: Partition plate; 715: Heat exchange plate. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail.

[0026] Furthermore, the technical features described herein, or the steps in all the methods or processes disclosed herein, may be combined in any suitable manner in one or more embodiments, except for mutually exclusive features and / or steps. It will be readily understood by those skilled in the art that the order of steps or operations of the methods relating to the embodiments provided herein may also be altered. Any order in the drawings and embodiments is for illustrative purposes only and does not imply a requirement to follow a particular order unless explicitly stated otherwise.

[0027] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, under reasonable circumstances (without self-contradiction), include both direct and indirect connections (linkages).

[0028] The following is a detailed explanation with reference to the accompanying drawings.

[0029] Example 1

[0030] This application provides a die-casting mold for producing aircraft engine cylinder blocks, which includes a first mold body 1, a second mold body 2, a support assembly 3, a mounting base 4, an adjustable blocking assembly 5, an exhaust backpressure assembly 6, and a cooling assembly 7.

[0031] according to Figure 1-4 In one specific embodiment, a first mold body 1 and a second mold body 2 are configured to cooperate to form a die-casting cavity. The first mold body 1 and the second mold body 2 are mounted on a platform defined by a mounting base 4 via a support assembly 3. The first mold body 1 is adjustablely suspended directly above the second mold body 2. Thus, the second mold body 2, under the limiting support drive of the support assembly 3, controllably engages with the first mold body 1 to form a closed die-casting cavity. An adjustable blocking assembly 5 for sealing the injection port and an exhaust backpressure assembly 6 for venting gas from the die-casting cavity before injection and pressurizing and refilling the die-casting cavity after injection to improve injection sufficiency are also installed on the surface of the first mold body 1. Cooling assemblies 7 for accelerating the solidification of the molten metal in the die-casting cavity are also spaced apart on the surfaces of the first mold body 1 and the second mold body 2. The exhaust backpressure assembly 6 provided in this application can pre-extract gas from the die-casting mold cavity as needed, increasing the vacuum level of the die-casting mold cavity and ensuring more complete filling of molten metal to obtain a more complete metal die-casting part. Furthermore, after the injection operation, the exhaust backpressure assembly 6 can maintain the high-pressure state of the molten metal in the die-casting mold cavity and compensate for gaps by pushing back, further improving the integrity, structural strength, and density of the casting during die-casting filling and solidification, ensuring the quality of the die-casting product. The cooling assembly 7 provided in this application can actively transfer heat in the die-casting mold cavity as needed, thereby improving the speed and efficiency of cooling and solidification and shortening the die-casting cycle.

[0032] Preferably, the support assembly 3 includes a hydraulic lifting rod 31 connected to the ear plate 11 at the side corner of the first mold body 1 and a support column 32 supported below the second mold body 2. Specifically, the hydraulic lifting rod 31 can drive the first mold body 1 to move up and down, thereby changing the docking state between the first mold body 1 and the second mold body 2, so as to facilitate the removal of the molded body. Preferably, the hydraulic lifting rod 31 can be an electro-hydraulic actuator of model 2254zy16. The support column 32 is a heavy-duty support column of model HJ-001.

[0033] Preferably, the adjustable blocking assembly 5 includes a guide tube shell 51, a drive rod 52, and a blocking block 53. Preferably, the guide tube shell 51 extends laterally through the first mold body 1 and communicates with the injection port of the first mold body 1. Preferably, the drive rod 52 is inserted into one end of the guide tube shell 51 away from the first mold body 1. More preferably, one end of the drive rod 52 inserted into the guide tube shell 51 is connected to the blocking block 53 embedded in the guide tube shell 51, so that the drive rod 52 can adjustably push the blocking block 53 to move laterally in the guide tube shell 51 to selectively cut off and block the injection port of the first mold body 1. Specifically, the drive rod 52 can be a high-thrust telescopic cylinder of model DNC63. Preferably, a sealing gasket 511 capable of filling the assembly gap between its shell cavity and the blocking block 53 is embedded in the inner wall surface of the guide tube shell 51. When the output port of the injection system is aligned with the injection port of the first mold body 1, the injection punch of the injection system can quickly push the molten metal in the pressure chamber into the die-casting mold cavity at high pressure and high speed to effectively fill the die-casting mold cavity. After the injection process is completed, the drive rod 52 pushes the sealing block 53 to move laterally and out of the guide tube shell 51, thereby cutting off the injection port connected to the guide tube shell 51. The lower surface of the sealing block 53 can fit with the inner wall of the die-casting mold cavity to form a flat mold cavity contour surface that blocks the injection port, so as to ensure that the molten metal can form a flat surface contour when solidifying. The sealing block 53 can quickly cut off the injection port, thereby completing the separation of the injection system from the mold while ensuring pressurized filling. This facilitates the injection system to switch between multiple molds and quickly realize the injection filling work of multiple molds, improving the overall efficiency and speed of mass casting and reducing the production cycle.

[0034] Preferably, the exhaust and backpressure assembly 6 is inserted into the first mold body 1 at multiple points in a spaced-out manner. Preferably, the exhaust and backpressure assembly 6 includes an insertion tube 61, an exhaust mechanism 62, and a backpressure mechanism 63. Preferably, the insertion tube 61 is inserted into the first mold body 1 in a manner that penetrates the first mold body 1 and communicates with the die-casting mold cavity. More preferably, the end of the insertion tube 61 away from the first mold body 1 is also connected to an exhaust mechanism 62 capable of extracting gas from the die-casting mold cavity. More preferably, a backpressure mechanism 63 is provided inside the insertion tube 61, capable of selectively cutting off its cavity and supplementing the pressure of the die-casting mold cavity by pushing back the melt. The insertion tube 61 provided in this application can communicate with the die-casting mold cavity, so that the exhaust mechanism 62 can extract air from the die-casting mold cavity before die-casting, improve the vacuum degree of the die-casting mold cavity, ensure the sufficiency of subsequent injection, reduce the probability of porosity, and improve the quality and structural strength of die-casting. The back pressure mechanism 63 provided in this application can adjustably push the partially molten metal in the injection tube 61 back into the die-casting mold cavity under pressure. This effectively maintains the pressure intensity of the molten metal in the die-casting mold cavity during the solidification process after the injection system separates from the mold. It can also compensate for the filling of condensation pores and complex empty areas of the mold cavity that have not been effectively filled, thereby improving the integrity and sufficiency of the die-casting mold cavity filling. This ensures that the molded part after solidification has a surface contour consistent with the die-casting mold cavity and reduces the generation of defects such as porosity, greatly improving the structural strength and quality of the die-cast parts.

[0035] Preferably, an exhaust pipe cavity 611 and a refill melt receiving cavity 612 are provided coaxially within the insert tube 61. Specifically, the exhaust pipe cavity 611 is connected to the refill melt receiving cavity 612 in such a way that a stepped annular surface is formed at its connection point with the refill melt receiving cavity 612, and a converging tube body 613 with an inclined inner annular surface is also provided on the stepped annular surface between the exhaust pipe cavity 611 and the refill melt receiving cavity 612. Specifically, the diameter of the exhaust pipe cavity 611 is larger than the diameter of the refill melt receiving cavity 612.

[0036] Preferably, the exhaust mechanism 62 includes an exhaust pipe 621 connected to the insertion tube 61 and a vacuum pump 622 mounted on the exhaust pipe 621 to drive the airflow in a directional direction. Preferably, a one-way exhaust valve 623 is also provided in the exhaust pipe 621 to limit the one-way discharge of airflow. Preferably, the vacuum pump 622 can be a high negative pressure vacuum pump of the V70 series. It can fully pre-evacuate the air in the die-casting mold cavity, thereby increasing the vacuum degree of the die-casting mold cavity, reducing the impact of residual gas on the fullness of mold cavity injection filling, and reducing the risk of defects such as porosity and voids.

[0037] Preferably, the backpressure mechanism 63 includes a telescopic rod 631 inserted into the top end face of the insertion tube 61, a pressure block 632 installed at the axial lower end of the telescopic rod 631, and a backpressure plug sleeve 633 sleeved on the pressure block 632. Preferably, the backpressure plug sleeve 633 is made of corrosion-resistant and high-temperature-resistant silicone material, which gives it a certain structural strength while preventing it from being burned by molten metal. Preferably, the telescopic rod 631 can be a high-thrust electro-hydraulic actuator from the DYTZ series. Preferably, a guide correction ring 635 is also movably sleeved on the outside of the pressure block 632 via a spring 634 at the axial upper end of the pressure block 632. Specifically, the guide correction ring 635 fits against the inner ring surface of the receiving tube 613, correcting the centering position of the descending pressure block 632. This ensures that the pressure block 632 can be accurately inserted into the refill melt receiving cavity 612, allowing the refill melt receiving cavity 612 and the pressure block 632 to cooperate in forming a melt compensation sub-cavity that accommodates a certain amount of molten metal and is only connected to the die-casting mold cavity. This eliminates injection voids caused by insufficient filling of the die-casting mold cavity by back-pressing the melt in the melt compensation sub-cavity into the die-casting mold cavity, thus improving the die-casting effect. Before die-casting, the telescopic rod 631 is in a shortened state, at which time the insert tube 61 is connected to the venting mechanism 62 for venting. After the venting operation is completed, the telescopic rod 631 extends downwards, causing the guide correction ring 635 to abut against the inclined inner ring surface of the converging tube 613. This effectively corrects the centering position of the pressure block 632, allowing it to be precisely inserted into the refill melt receiving cavity 612. This enables the back pressure plug 633 to form a closed cavity space with the refill melt receiving cavity 612, communicating with the die-casting mold cavity and capable of accommodating some excess molten metal. After the injection process is completed, as the telescopic rod 631 further descends, the plug formed by the pressure block 632 and the back pressure plug 633 pushes excess molten metal back into the die-casting mold cavity, maintaining a high-pressure state in the molten metal. This ensures the high-pressure density and compactness of the molten metal during solidification, improving the structural strength and density of the formed workpiece, reducing the presence of bubbles and pores, and improving product quality. In addition, the reflowing molten metal can compensate for and fill complex voids that were not effectively filled during the initial injection, enabling the mold body to have a surface profile that is completely consistent with the mold cavity, thereby improving the surface profile quality of the mold body parts after solidification.

[0038] Preferably, the cooling assembly 7 includes a cooling tube 71 detachably inserted into the first mold body 1 and the second mold body 2, an inlet pipe 72 capable of introducing coolant into a plurality of parallel cooling tubes 71, and an outlet pipe 73 capable of transferring the coolant after heat absorption. Preferably, a cover 712 is provided on the tube body 711 of the cooling tube 71. More preferably, two pipe connectors 713, respectively connected to the inlet pipe 72 and the outlet pipe 73, are inserted into the cover 712. Preferably, a partition 714 capable of axially dividing the tube body 711 is also provided in the tube cavity. Preferably, a heat exchange plate 715, which is close to the die-casting mold cavity and can accelerate heat transfer, is embedded on the end face of the tube body 711 away from the cover 712. Preferably, the heat exchange plate 715 is a semiconductor heat exchange plate, which can accelerate the heat transfer between the mold body and the coolant, so that the mold body temperature can be reduced more quickly and the cooling efficiency can be improved. The inlet pipe 72 and outlet pipe 73 provided in this application can be connected to an external coolant circulation device, thereby utilizing the coolant circulation device to achieve continuous supply and recovery of coolant for heat dissipation, thus forming a cooling circulation loop. The cooling pipes 71 provided in this application are installed on the first mold body 1 and the second mold body 2 in an intermittent insertion manner, thereby reducing the impact on the structural strength of the mold body, ensuring the structural stability of the die-casting mold cavity, and being as close as possible to the die-casting mold cavity to quickly transfer heat in the die-casting mold cavity, thereby increasing the solidification speed of the molten metal in the die-casting mold cavity.

[0039] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A die-casting mold for producing an aero-engine cylinder block, comprising a first mold body (1) and a second mold body (2) capable of mutually cooperating to form a die-casting cavity, characterized in that, The first mold (1) and the second mold (2) are mounted on the platform defined by the mounting base (4) via the support assembly (3); An adjustable plugging component (5) capable of sealing the injection port and an exhaust backpressure component (6) capable of venting gas from the die-casting cavity before injection and pressurizing and refilling the die-casting cavity after injection are installed on the surface of the first mold body (1). The surfaces of the first mold (1) and the second mold (2) are also fitted with cooling components (7) that can accelerate the solidification of the molten metal in the die-casting mold cavity.

2. The die-casting mold for producing aero-engine cylinder blocks as described in claim 1, characterized in that, The exhaust backpressure assembly (6) includes a insert pipe (61), an exhaust mechanism (62), and a backpressure mechanism (63), wherein, The insert tube (61) is inserted into the first mold body (1) in a manner that penetrates the first mold body (1) and communicates with the die-casting mold cavity. The end of the insert tube (61) away from the first mold body (1) is also connected to an exhaust mechanism (62) that can extract and exhaust gas in the die-casting mold cavity. The insert tube (61) is provided with a back pressure mechanism (63) that can selectively cut off its lumen and supplement the pressure of the die casting mold cavity by pushing back the melt.

3. The die-casting mold for producing aero-engine cylinder blocks as described in claim 2, characterized in that, An exhaust chamber (611) and a refill melt receiving chamber (612) are provided coaxially within the insert tube (61), wherein, The exhaust pipe cavity (611) is connected to the refill melt receiving cavity (612) in such a way that a stepped annular surface is formed at its docking point with the refill melt receiving cavity (612). Furthermore, a slope is provided on the stepped annular surface between the exhaust pipe cavity (611) and the refill melt receiving cavity (612). The converging tube body (613) of the oblique inner ring surface.

4. The die-casting mold for producing aero-engine cylinder blocks as described in claim 3, characterized in that, The exhaust mechanism (62) includes an exhaust pipe (621) connected to the insert tube (61) and a vacuum pump (622) mounted on the exhaust pipe (621) to drive the airflow in a directional manner. A one-way exhaust valve (623) is also provided in the exhaust pipe (621) to limit the one-way discharge of airflow.

5. The die-casting mold for producing aero-engine cylinder blocks as described in claim 4, characterized in that, The back pressure mechanism (63) includes a telescopic rod (631) inserted into the top end face of the insertion tube (61), a pressure block (632) installed at the axial lower end of the telescopic rod (631), and a back pressure plug sleeve (633) sleeved on the pressure block (632). At the upper axial end of the pressure block (632), a guide correction ring (635) is movably sleeved on its outside via a spring (634).

6. The die-casting mold for producing aero-engine cylinder blocks as described in claim 5, characterized in that, The adjustable blocking assembly (5) includes a guide tube shell (51), a drive rod (52), and a blocking block (53), wherein, The conductive tube shell (51) extends laterally through the first mold body (1) and is connected to the injection port of the first mold body (1). The drive rod (52) is inserted at one end of the conductive tube shell (51) away from the first mold body (1), and one end of the drive rod (52) inserted into the conductive tube shell (51) is connected to the sealing block (53) embedded in the conductive tube shell (51).

7. The die-casting mold for producing aero-engine cylinder blocks as described in claim 6, characterized in that, A sealing gasket (511) capable of filling the assembly gap between its cavity and the sealing block (53) is embedded on the inner wall surface of the conductive tube shell (51).

8. The die-casting mold for producing aero-engine cylinder blocks as described in claim 7, characterized in that, The support assembly (3) includes a hydraulic lifting rod (31) connected to the ear plate (11) at the side corner of the first mold (1) and a support column (32) supported below the second mold (2).

9. The die-casting mold for producing aero-engine cylinder blocks as described in claim 8, characterized in that, The cooling assembly (7) includes a cooling tube (71) detachably inserted into the first mold (1) and the second mold (2), an inlet pipe (72) capable of inputting coolant into a plurality of parallel cooling tubes (71), and an outlet pipe (73) capable of transferring the coolant after heat absorption.

10. The die-casting mold for producing aero-engine cylinder blocks as described in claim 9, characterized in that, A cover (712) is provided on the tube body (711) of the cooling tube (71), and two pipe connectors (713) that can be inserted into the cover (712) respectively to connect with the inlet pipe (72) and the outlet pipe (73); The lumen of the cannula body (711) is also provided with a partition (714) that can axially divide the lumen; The end face of the insertion tube body (711) away from the cover body (712) is fitted with a heat exchange plate (715) that is close to the die-casting mold cavity and can accelerate heat transfer.

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