Engine cylinder block die-casting forming die and die-casting forming method thereof

Abstract

The invention relates to the technical field of dies, and discloses an engine cylinder block die-casting forming die and a die-casting forming method.The engine cylinder block die-casting forming die comprises a fixed die, a cavity assembly, an ejection mechanism and a cooling assembly.The fixed die comprises a first fixed die plate, a guide shaft sleeve and a second fixed die plate, and the guide shaft sleeve is fixedly connected to the top face of the first fixed die plate; the second fixed mold plate is arranged on the first fixed mold plate, the mold cavity assembly is arranged on the first fixed mold plate, the ejection mechanism is arranged on the second fixed mold plate, the cooling assemblies are arranged on the first fixed mold plate and the second fixed mold plate correspondingly, gas ejection is conducted firstly, friction force and adsorption force between a cylinder body and a mold are reduced, and during follow-up ejection, the mold cavity assembly is arranged on the second fixed mold plate. And the impact force on the cylinder body is correspondingly reduced, so that the abrasion degree of the cylinder body is reduced, the service life of the cylinder body is prolonged, the external force borne by the cylinder body is softer and more progressive, and the damage to the cylinder body possibly caused by instant powerful ejection in a single ejection mode is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly to a die-casting mold for engine cylinder blocks and a die-casting method therefor. Background Art

[0002] Engine cylinder block die-casting is an advanced metal forming process mainly used for manufacturing engine cylinder blocks. By using high pressure, liquid or semi-liquid metal alloy is rapidly injected into a pre-designed mold cavity. Under the action of high pressure, the metal liquid quickly fills every corner of the mold, and then rapidly cools and solidifies in the mold, finally forming an engine cylinder block with specific shape and dimensions. The main equipment is a die-casting mold, which is the key factor determining the shape, dimensions and surface quality of the engine cylinder block. It usually consists of a fixed mold and a moving mold. The fixed mold is fixed on the fixed template of the die-casting machine, and the moving mold is installed on the moving template. The mold opens and closes as the moving template moves. The mold interior is designed with structures such as a cavity, a runner, an overflow groove, and a cooling water channel that match the shape of the engine cylinder block.

[0003] Currently, for die-casting molds on the market, when die-casting an engine cylinder block is completed, the engine cylinder block is ejected by ejector pins, which are generally installed on the moving mold side. When die-casting is completed and the mold opening action is finished, the ejecting mechanism of the die-casting machine pushes the ejector pin fixing plate, causing the ejector pins to extend from the mold cavity and eject the engine cylinder block from the mold. Since the friction and adsorption force between the cylinder block and the mold are relatively large just after die-casting, if it is directly ejected by the ejector pins, obvious ejector pin marks may be left at the positions where the ejector pins contact the cylinder block, affecting the appearance quality of the cylinder block, and the ejector pins may also have problems such as breakage or wear.

[0004] Therefore, it is necessary to provide a die-casting mold for engine cylinder blocks and a die-casting method therefor to solve the above problems. Summary of the Invention

[0005] In view of the above problems of a die-casting mold for engine cylinder blocks and a die-casting method therefor, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a die-casting mold for engine cylinder blocks and a die-casting method therefor, which are used to solve problems such as large friction and adsorption force between the cylinder block and the mold just after die-casting, and easy damage to the cylinder block when directly ejected by ejector pins.

[0007] In a first aspect, to solve the above technical problems, the present invention provides the following technical solution: A die-casting forming mold for an engine cylinder block, comprising: a fixed mold, a cavity assembly, an ejection mechanism, and a cooling assembly. The fixed mold includes a first fixed template, a guide bushing, and a second fixed template. The guide bushing is fixedly connected to the top surface of the first fixed template. The second fixed template is disposed on the first fixed template. The cavity assembly is disposed on the first fixed template. The ejection mechanism is disposed on the second fixed template. The cooling assembly is respectively disposed on the first fixed template and the second fixed template.

[0008] By adopting the above technical solution, when the staff needs to perform die-casting on the engine cylinder block, first, the staff fixes the first fixed template on the second fixed template, and then the staff pours the molten metal into the cavity assembly through the guide bushing. As the molten metal enters the inner cavities of the first fixed template and the second fixed template through the cavity assembly, die-casting operation can be performed on the engine cylinder block. After the die-casting of the engine cylinder block is completed, the staff separates the first fixed template and the second fixed template, and then the staff cools down the die-cast engine cylinder block through the cooling assembly. Then, the staff uses the ejection mechanism to eject the engine cylinder block located on the second fixed template twice to separate the engine cylinder block from the second fixed template, completing the die-casting operation of the engine cylinder block.

[0009] As a preferred solution of the die-casting forming mold for an engine cylinder block of the present invention, wherein: the cavity assembly includes a main runner hole, a sub-runner, and a gate. The main runner hole is formed on the first fixed template. The part of the first fixed template near the bottom end of the main runner hole is provided with the sub-runner. The first fixed template is also provided with the gate, and the main runner hole, the sub-runner, and the gate are interconnected.

[0010] As a preferred solution of the die-casting forming mold for an engine cylinder block of the present invention, wherein: the ejection mechanism includes an ejection tube, a sealing cap, and a connection assembly. A first through hole is formed on the second fixed template. The ejection tube is slidably connected to the first through hole. The sealing cap is slidably connected to one end of the ejection tube close to the first fixed template. The connection assembly is disposed on the ejection tube.

[0011] As a preferred embodiment of the die-casting mold for an engine cylinder block according to the present invention, the connection assembly includes a fixing post, a first spring, a first fixing plate, and a second fixing plate. One end of the fixing post is fixedly connected to the sealing cap, and the other end of the fixing post is fixedly connected to the first fixing plate. A plurality of groups of fixing posts are provided, and the first fixing plate is slidably connected to the ejector pipe. The second fixing plate is fixedly connected to the ejector pipe. One end of the first spring is connected to the first fixing plate, and the other end of the first spring is connected to the second fixing plate. A plurality of second through holes are provided on the sealing cap.

[0012] As a preferred embodiment of the die-casting mold for an engine cylinder block according to the present invention, a spacer is fixedly connected to the end of the second fixed template away from the first fixed template. A second fixed template base is fixedly connected to the end of the spacer away from the second fixed template. A first sliding groove is provided on the spacer. The ejector pin fixing plate is fixedly connected to the ejector pipe. A connecting pipe is provided on the ejector pipe and is in communication with the ejector pipe. A first slider is fixedly connected to the ejector pin fixing plate, and the first slider is slidably connected to the spacer through the first sliding groove.

[0013] As a preferred embodiment of the die-casting mold for an engine cylinder block according to the present invention, the cooling assembly includes a cooling pipeline, a water outlet, and a water inlet. The cooling pipeline is provided on the first fixed template and the second fixed template, and the water outlet and the water inlet are provided on the first fixed template and the second fixed template.

[0014] As a preferred embodiment of the die-casting mold for an engine cylinder block according to the present invention, a guiding groove is provided on the surface of the second fixed template close to the first fixed template, and a guiding convex block is fixedly connected to the surface of the first fixed template close to the second fixed template.

[0015] As a preferred embodiment of the die-casting mold for an engine cylinder block and its die-casting method according to the present invention, a lifting ring is fixedly connected to the side surface of the second fixed template.

[0016] As a preferred embodiment of the die-casting mold for an engine cylinder block according to the present invention, a threaded hole is provided on the ejector pin fixing plate.

[0017] In a second aspect, the present invention provides a die-casting method for a die-casting mold for an engine cylinder block. The die-casting method for a die-casting mold for an engine cylinder block includes the following steps:

[0018] S1: Make the first fixed template and the second fixed template abut against each other, and the guiding bumps provided on the first fixed template are engaged with the guiding grooves on the second fixed template;

[0019] S2: Inject molten metal into the guiding bushing. The molten metal flows into the bottom end of the main runner hole along the main runner hole. The molten metal flows into the runner through the runner opened at the bottom end of the main runner hole, and then the molten metal flows from the runner to the gate, and the molten metal flows into the cavity in the first fixed template and the second fixed template;

[0020] S3: After die-casting is completed, separate the first fixed template and the second fixed template, and then inject cooling liquid into the cooling pipeline through the water outlet to cool the cylinder block just die-cast;

[0021] S4: When the cylinder block needs to be ejected, inject gas into the connecting pipe through an air pump, and then inject gas into the ejector pipe through the connecting pipe. As the gas is injected, the sealing cap gradually slides on the ejector pipe, stretching the first spring. As the sealing cap separates from the ejector pipe, the gas in the ejector pipe flows out through the second through-hole to eject the die-cast engine cylinder block;

[0022] S5: Move the ejector pin fixing plate so that the ejector pin fixing plate slides on the first chute, driving the ejector pipe to slide on the first through-hole, and then the ejector pipe drives the sealing cap to completely eject the die-cast engine cylinder block.

[0023] In the technical solution described above in the embodiment of the present application, it has at least the following technical effects:

[0024] In the present invention, through the setting of the fixed mold, the cavity assembly, the ejection mechanism and the cooling component, and the fixed mold includes the first fixed template, the guiding bushing and the second fixed template. When using the ejection mechanism for ejection, for the first ejection, the gas can form an air cushion between the cylinder block and the mold, effectively reducing the friction between the two, making it easier for the cylinder block to be removed from the mold, reducing the mechanical force required during the ejection process, reducing the risk of damage to the cylinder block and the mold, and being able to act more evenly on the surface of the engine cylinder block. Due to the buffering and lubricating effect of the gas, it can reduce the direct contact and friction between the cylinder block and the mold surface, helping to prevent defects such as scratches and scars on the cylinder block surface and improving the surface quality of the cylinder block. For the second ejection, it can provide a relatively stable and precisely controllable ejection force. According to factors such as the shape, size and weight of the cylinder block, ensure that the cylinder block remains stable during the ejection process, without shaking or offset, making the ejection force distribution more reasonable, and effectively avoiding deformation or damage of the cylinder block due to uneven force. Description of the Drawings

[0025] To more clearly illustrate the technical solutions of 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.

[0026] Figure 1 It is a schematic diagram of the overall structure of a die-casting forming mold for an engine cylinder block of the present invention;

[0027] Figure 2 It is a rear view of a die-casting forming mold for an engine cylinder block of the present invention;

[0028] Figure 3 It is a cross-sectional view of the first fixed template of a die-casting forming mold for an engine cylinder block of the present invention;

[0029] Figure 4 It is Figure 3 an enlarged view of part A in

[0030] Figure 5 It is a schematic diagram of the first exploded structure of a die-casting forming mold for an engine cylinder block of the present invention;

[0031] Figure 6 It is a schematic diagram of the second exploded structure of a die-casting forming mold for an engine cylinder block of the present invention;

[0032] Figure 7 It is a cross-sectional view of the second fixed template of a die-casting forming mold for an engine cylinder block of the present invention;

[0033] Figure 8 It is Figure 7 an enlarged view of part B in

[0034] Figure 9 It is a schematic diagram of the structure of the ejection mechanism of a die-casting forming mold for an engine cylinder block of the present invention;

[0035] Figure 10 It is a cross-sectional view of a die-casting forming mold for an engine cylinder block of the present invention;

[0036] Figure 11 It is a schematic diagram of the structure of the cooling component of a die-casting forming mold for an engine cylinder block of the present invention.

[0037] Description of the drawings: 100, fixed mold; 101, first fixed mold plate; 102, guide bushing; 103, second fixed mold plate; 200, cavity assembly; 201, main runner hole; 202, sub - runner; 203, gate; 300, ejection mechanism; 301, ejection tube; 302, sealing cap; 303, connection assembly; 3031, fixing post; 3032, first spring; 3033, first fixing plate; 3034, second fixing plate; 400, first through - hole; 500, second through - hole; 600, base of the second fixed mold plate; 601, spacer block; 602, first chute; 603, first slider; 604, ejector retainer plate; 605, connecting pipe; 700, cooling assembly; 701, cooling pipeline; 702, water outlet; 703, water inlet; 800, guiding projection; 900, guiding groove; 1000, lifting ring. Detailed implementation manners

[0038] In order to make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings in the specification.

[0039] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] Secondly, the so - called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0041] Furthermore, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross - sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention herein. In addition, in actual production, three - dimensional spatial dimensions including length, width and depth should be included.

[0042] In the die-casting molds on the market, when die-casting the engine cylinder block is completed, the engine cylinder block is ejected by ejector pins, which are generally installed on the moving die side. When die-casting is completed and the mold opening action is finished, the ejector mechanism of the die-casting machine pushes the ejector pin fixing plate, so that the ejector pins extend out of the mold cavity and eject the engine cylinder block from the mold. Since the friction and adsorption force between the cylinder block and the mold are relatively large when die-casting is just completed, if the ejector pins are directly used for ejection, obvious ejector pin marks may be left at the positions where the ejector pins contact the cylinder block, affecting the appearance quality of the cylinder block, and the ejector pins may break or wear.

[0043] Based on this, in order to solve the above problems, the embodiments of the present application provide the following solutions.

[0044] Embodiment 1:

[0045] Please refer to Figures 1 to 11 together. For the first embodiment of the present invention, a die-casting mold for an engine cylinder block is provided, which includes: a fixed mold 100, a cavity assembly 200, an ejector mechanism 300, and a cooling assembly 700. The fixed mold 100 includes a first fixed template 101, a guide bushing 102, and a second fixed template 103. The guide bushing 102 is fixedly connected to the top surface of the first fixed template 101, the second fixed template 103 is arranged on the first fixed template 101, the cavity assembly 200 is arranged on the first fixed template 101, the ejector mechanism 300 is arranged on the second fixed template 103, the cooling assembly 700 is respectively arranged on the first fixed template 101 and the second fixed template 103. A guide groove 900 is opened on the surface of the second fixed template 103 close to the first fixed template 101, and a guide protrusion 800 is fixedly connected to the surface of the first fixed template 101 close to the second fixed template 103.

[0046] Optionally, in some embodiments, please refer to Figure 3 and Figure 4 together. The cavity assembly 200 includes a main runner hole 201, a sub-runner 202, and a gate 203. The main runner hole 201 is opened on the first fixed template 101, the sub-runner 202 is opened on the part of the first fixed template 101 close to the bottom end of the main runner hole 201, the gate 203 is also opened on the first fixed template 101, and the main runner hole 201, the sub-runner 202, and the gate 203 are interconnected.

[0047] As can be seen from the above, when the staff performs die-casting on the engine block, the staff first makes the first fixed template 101 and the second fixed template 103 abut against each other, so that the guiding convex block 800 on the first fixed template 101 abuts against the guiding groove 900 on the second fixed template 103, making the first fixed template 101 and the second fixed template 103 closely connected together. Then, the staff injects molten metal into the main runner hole 201 through the guiding bushing 102. The molten metal flows from the bottom end of the main runner hole 201 into the sub-runner 202, and then from the sub-runner 202 into the gate 203. Then, the molten metal flows through the gate 203 into the inner cavities of the first fixed template 101 and the second fixed template 103 to perform die-casting on the engine block. By setting the sub-runner 202, die-casting can be performed on both sides of the engine block simultaneously, reducing the die-casting time of the engine block and improving work efficiency.

[0048] Optionally, in some embodiments, please also refer to Figure 2 and Figure 11 , the cooling component 700 includes a cooling pipeline 701, a water outlet 702 and a water inlet 703. The cooling pipeline 701 is arranged on the first fixed template 101 and the second fixed template 103, and the water outlet 702 and the water inlet 703 are opened on the first fixed template 101 and the second fixed template 103.

[0049] As can be seen from the above, when die-casting the engine block, the staff injects coolant into the cooling pipeline 701 through the water inlet 703, so that the coolant circulates in the cooling pipeline 701. This can make the cooling speed of each part of the block more uniform, reduce the thermal stress caused by uneven cooling, avoid defects such as shrinkage cavities, shrinkage porosity, deformation and cracks, improve the dimensional accuracy and internal quality of the block, ensure its performance and reliability, effectively take away the heat generated during the die-casting process, accelerate the cooling and solidification speed of the block, shorten the single die-casting cycle, produce more blocks per unit time, improve production efficiency, reduce production costs, quickly cool and shape the block, better maintain its shape during ejection, not easily deform, facilitate ejection from the mold, reduce production interruptions and scrap rates caused by difficult demolding, and further improve production efficiency. During the die-casting process, the cooling pipe can make the temperature change of the mold more stable, reduce the thermal shock when injecting molten metal, protect the hardness and smoothness of the mold surface, reduce the mold wear and corrosion speed, keep the mold in good forming performance, and is conducive to the long-term stable production of high-quality engine blocks.

[0050] Optionally, in some embodiments, please also refer to Figures 5 to 9, the ejection mechanism 300 includes an ejection tube 301, a sealing cap 302, and a connection assembly 303. A first through hole 400 is formed in the second fixed template 103. The ejection tube 301 is slidably connected to the first through hole 400. The sealing cap 302 is slidably connected to one end of the ejection tube 301 close to the first fixed template 101. The connection assembly 303 is arranged on the ejection tube 301. The connection assembly 303 includes a fixing column 3031, a first spring 3032, a first fixing disk 3033, and a second fixing disk 3034. One end of the fixing column 3031 is fixedly connected to the sealing cap 302, and the other end of the fixing column 3031 is fixedly connected with the first fixing disk 3033. And multiple groups of fixing columns 3031 are provided. And the first fixing disk 3033 is slidably connected to the ejection tube 301. The second fixing disk 3034 is fixedly connected to the ejection tube 301. One end of the first spring 3032 is connected to the first fixing disk 3033, and the other end of the first spring 3032 is connected to the second fixing disk 3034. Multiple groups of second through holes 500 are formed in the sealing cap 302. A spacer 601 is fixedly connected to one end of the second fixed template 103 away from the first fixed template 101. A second fixed template base 600 is fixedly connected to one end of the spacer 601 away from the second fixed template 103. A first sliding groove 602 is formed in the spacer 601. The ejector pin fixing plate 604 is fixedly connected to the ejection tube 301. A connecting pipe 605 is arranged on the ejection tube 301, and the connecting pipe 605 communicates with the ejection tube 301. A first slider 603 is fixedly connected to the ejector pin fixing plate 604, and the first slider 603 is slidably connected to the spacer 601 through the first sliding groove 602. A threaded hole is formed in the ejector pin fixing plate 604.

[0051] As can be seen from the above, after the die-casting of the engine cylinder block is completed, the staff separates the first fixed template 101 from the second fixed template 103. When no gas is injected, under the action of the first spring 3032, the sealing cap 302 tightly abuts against the ejection pipe 301. Then, the staff injects gas into the connecting pipe 605 through the gas injection mechanism. Since the connecting pipe 605 is interconnected with the ejection pipe 301, as the gas is injected, the gas gradually ejects the sealing cap 302 and stretches the first spring 3032, causing the first fixed disk 3033 to slide on the ejection pipe 301. Then, as the first fixed disk 3033 gradually slides, the gas first flows out from the second through-hole 500 closest to the first spring 3032 at the bottom end of the sealing cap 302. Since the bottom end of the sealing cap 302 is inclined and the positions of the second through-holes 500 on the sealing cap 302 are different, when starting to eject, the cylinder block and the mold are closely attached, and the demolding resistance is large. When the gas strength is small, a uniform air cushion can be formed between the cylinder block and the mold first, playing a preliminary role of isolation and lubrication, reducing the friction between the two. Then, as the distance between the sealing cap 302 and the ejection pipe 301 becomes farther and farther, more gas can also flow out from the second through-holes 500 on the sealing cap 302. In this way, as the gas strength gradually increases, the pressure and buffering effect of the air cushion are enhanced, further reducing the demolding resistance and making it easier for the cylinder block to be demolded from the mold, reducing problems such as surface scratches and deformation of the cylinder block caused by difficult demolding. If the gas strength is too large at the beginning, it may cause excessive local stress on the cylinder block, resulting in stress concentration and damage to the cylinder block. Gradually increasing the gas strength allows the cylinder block to be separated from the mold evenly and gradually at each part, making the force act more evenly, avoiding local stress concentration, and protecting the integrity and dimensional accuracy of the cylinder block. During the stable ejection process with the gradually increasing gas strength, the external force on the cylinder block is relatively uniform and stable. Compared with the situation of suddenly applying a large ejection force, the risk of deformation of the cylinder block is significantly reduced, which helps to ensure the dimensional accuracy and shape accuracy of the cylinder block and improve the stability of the cylinder block quality. The internal structure of the engine cylinder block is complex. The ejection method with gradually increasing gas strength can avoid damage or deformation to the internal structures such as cooling channels and oil channels in the cylinder block due to excessive impact force or uneven force, ensuring the integrity of the internal structure of the cylinder block, and thus ensuring the performance and reliability of the cylinder block, completing the first ejection of the engine cylinder block. Then, the staff moves the ejector pin fixing plate 604, and the first slider 603 slides on the first chute 602. The first chute 602 limits the ejector pin fixing plate 604 to prevent the ejector pin fixing plate 604 from shifting during the sliding process, affecting the ejection operation of the engine cylinder block. Then, as the ejector pin fixing plate 604 moves, the ejection pipe 301 slides on the first through-hole 400, causing the sealing cap 302 to eject the engine cylinder block, gradually separating the engine cylinder block from the mold. With such a setting for the first ejection, gas ejection is carried out first.The friction and adsorption force between the cylinder block and the mold are reduced. When the subsequent ejector pipe 301 ejects, the impact force on the cylinder block is also correspondingly reduced, thereby reducing the wear degree of the cylinder block, extending the service life of the cylinder block, making the external force received by the cylinder block softer and more gradual, and avoiding the damage to the cylinder block that may be caused by instantaneously ejecting with great force in a single ejection method. Especially for the engine cylinder block with a complex structure and thin walls, it can better ensure its structural integrity. The gas ejection prepares for the ejection of the ejector pipe 301, greatly reducing the resistance that the ejector pipe 301 needs to overcome during the second ejection, thereby increasing the ejection speed, shortening the ejection time of a single cylinder block, and further increasing the production rhythm of the entire die-casting production and improving the production efficiency.

[0052] Optionally, in some embodiments, please refer to Figure 1 and Figure 2 , a lifting ring 1000 is fixedly connected to the side surface of the second fixed template 103.

[0053] Embodiment 1. The implementation principle of a die-casting mold for an engine cylinder block is as follows: When the staff performs die-casting on the engine cylinder block, the staff first makes the first fixed template 101 and the second fixed template 103 abut against each other, so that the guiding convex block 800 on the first fixed template 101 abuts against the guiding groove 900 on the second fixed template 103, making the first fixed template 101 and the second fixed template 103 tightly connected together. Then, the staff injects molten metal into the main runner hole 201 through the guiding bushing 102. The molten metal flows from the bottom end of the main runner hole 201 into the sub-runner 202, and then from the sub-runner 202 into the gate 203. Then, the molten metal flows into the inner cavities of the first fixed template 101 and the second fixed template 103 through the gate 203. When die-casting the engine cylinder block, the staff injects coolant into the cooling pipeline 701 through the water inlet 703, so that the coolant circulates in the cooling pipeline 701. After the die-casting of the engine cylinder block is completed, the staff separates the first fixed template 101 and the second fixed template 103. When no gas is injected, under the action of the first spring 3032, the sealing cap 302 tightly abuts against the ejector pipe 301. Then, the staff injects gas into the connecting pipe 605 through the gas charging mechanism. Since the connecting pipe 605 is interconnected with the ejector pipe 301, as the gas is injected, the gas gradually ejects the sealing cap 302 and stretches the first spring 3032, making the first fixed disk 3033 slide on the ejector pipe 301. Then, as the first fixed disk 3033 gradually slides, the gas first flows out from the second through-hole 500 closest to the first spring 3032 at the bottom end of the sealing cap 302. Then, as the distance between the sealing cap 302 and the ejector pipe 301 becomes farther and farther, more gas can also flow out from the second through-hole 500 on the sealing cap 302. Then, the staff moves the ejector pin fixing plate 604, and the first slider 603 slides on the first chute 602. The first chute 602 limits the ejector pin fixing plate 604 to prevent the ejector pin fixing plate 604 from shifting during the sliding process, which affects the ejection operation of the engine cylinder block. Then, as the ejector pin fixing plate 604 moves, the ejector pipe 301 slides on the first through-hole 400, and the sealing cap 302 ejects the engine cylinder block.

[0054] Embodiment 2: The present application embodiment also provides a die-casting method for a die-casting mold of an engine cylinder block. The die-casting method for a die-casting mold of an engine cylinder block includes the following steps:

[0055] S1: Make the first fixed template 101 and the second fixed template 103 abut against each other, and the guiding convex block 800 provided on the first fixed template 101 is engaged with the guiding groove 900 on the second fixed template 103;

[0056] S2: Inject molten metal into the guide bushing 102. The molten metal flows into the bottom end of the main runner hole 201 along the main runner hole 201, then flows into the runner 202 opened at the bottom end of the main runner hole 201, and then the molten metal flows through the runner 202 into the gate 203, and finally the molten metal flows into the cavity in the first fixed template 101 and the second fixed template 103.

[0057] S3: After die-casting is completed, separate the first fixed template 101 and the second fixed template 103, and then inject coolant into the cooling pipeline 701 through the water outlet 702 to cool the just die-cast cylinder block.

[0058] S4: When the cylinder block needs to be ejected, inject gas into the connecting pipe 605 through an air pump, and then inject gas into the ejector pipe 301 through the connecting pipe 605. As the gas is injected, the sealing cap 302 gradually slides on the ejector pipe 301, stretching the first spring 3032. As the sealing cap 302 separates from the ejector pipe 301, the gas in the ejector pipe 301 flows out through the second through-hole 500 to eject the die-cast engine cylinder block.

[0059] S5: Move the ejector pin fixing plate 604 so that the ejector pin fixing plate 604 slides on the first chute 602, driving the ejector pipe 301 to slide on the first through-hole 400, and then the ejector pipe 301 drives the sealing cap 302 to completely eject the die-cast engine cylinder block.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A die-casting mold for an engine cylinder block, characterized in that: include: A fixed mold (100), a cavity assembly (200), an ejection mechanism (300) and a cooling assembly (700), the fixed mold (100) comprising a first fixed mold plate (101), a guide sleeve (102) and a second fixed mold plate (103), the guide sleeve (102) being fixedly connected to the top surface of the first fixed mold plate (101), the second fixed mold plate (103) being arranged on the first fixed mold plate (101), the cavity assembly (200) being arranged on the first fixed mold plate (101), the ejection mechanism (300) being arranged on the second fixed mold plate (103), and the cooling assembly (700) being arranged on the first fixed mold plate (101) and the second fixed mold plate (103), respectively.

2. The die-casting mold for an engine cylinder block according to claim 1, characterized in that: The cavity assembly (200) comprises a main flow channel hole (201), a branch flow channel (202) and a gate (203); the main flow channel hole (201) is provided on the first fixed mold plate (101); the branch flow channel (202) is provided on a portion of the first fixed mold plate (101) close to the bottom end of the main flow channel hole (201); the gate (203) is also provided on the first fixed mold plate (101); and the main flow channel hole (201) is connected to the branch flow channel (202) and the gate (203).

3. The die-casting mold for an engine cylinder block according to claim 2, characterized in that: The ejection mechanism (300) comprises an ejection tube (301), a sealing cap (302) and a connecting assembly (303); a first through hole (400) is provided on the second fixed mold plate (103); the ejection tube (301) is slidably connected to the first through hole (400); the sealing cap (302) is slidably connected to one end of the ejection tube (301) close to the first fixed mold plate (101); and the connecting assembly (303) is arranged on the ejection tube (301).

4. The die-casting mold for an engine cylinder block according to claim 3, characterized in that: The connecting assembly (303) comprises a fixing column (3031), a first spring (3032), a first fixing disk (3033) and a second fixing disk (3034); one end of the fixing column (3031) is fixedly connected to the sealing cap (302); the other end of the fixing column (3031) is fixedly connected to the first fixing disk (3033); a plurality of fixing columns (3031) are provided; the first fixing disk (3033) is slidably connected to the ejection tube (301); the second fixing disk (3034) is fixedly connected to the ejection tube (301); one end of the first spring (3032) is connected to the first fixing disk (3033); the other end of the first spring (3032) is connected to the second fixing disk (3034); a second through hole (500) is provided on the sealing cap (302); a plurality of second through holes (500) are provided.

5. The die-casting mold for an engine cylinder block according to claim 4, characterized in that: A cushion block (601) is fixedly connected to one end of the second fixed mold plate (103) away from the first fixed mold plate (101); the cushion block (601) is fixedly connected to the second fixed mold plate base (600) at one end away from the second fixed mold plate (103); a first slide groove (602) is provided on the cushion block (601); an ejector pin fixing plate (604) is fixedly connected to the ejector tube (301); a connecting tube (605) is connected to one end of the ejector tube (301) away from the second fixed mold plate (103); the connecting tube (605) and the ejector tube (301) are communicated with each other; a first slider (603) is fixedly connected to the ejector pin fixing plate (604); and the first slider (603) is slidably connected to the cushion block (601) through the first slide groove (602).

6. The die-casting mold for an engine cylinder block according to claim 5, characterized in that: The cooling component (700) comprises a cooling pipeline (701), a water outlet (702) and a water inlet (703); the cooling pipeline (701) is arranged on the first fixed mold plate (101) and the second fixed mold plate (103); and the first fixed mold plate (101) and the second fixed mold plate (103) are provided with the water outlet (702) and the water inlet (703).

7. The die-casting mold for an engine cylinder block according to claim 6, characterized in that: A guide groove (900) is provided on a surface of the second fixed mold plate (103) close to the first fixed mold plate (101), and a guide protrusion (800) is fixedly connected to a surface of the first fixed mold plate (101) close to the second fixed mold plate (103).

8. The die-casting mold for an engine cylinder block according to claim 7, characterized in that: A lifting ring (1000) is fixedly connected to the side surface of the second fixed template (103).

9. The die-casting mold for an engine cylinder block according to claim 8, characterized in that: The ejector pin fixing plate (604) is provided with a threaded hole.

10. A control method for an engine cylinder die-casting mold, using an engine cylinder die-casting mold according to any one of claims 1 to 9, characterized in that: The steps include: S1: The first fixed mold plate (101) and the second fixed mold plate (103) are brought into contact with each other, and the guide protrusion (800) provided on the first fixed mold plate (101) and the guide groove (900) on the second fixed mold plate (103) are engaged with each other; S2: injecting molten metal into the guide sleeve (102), the molten metal flows into the bottom end of the main channel hole (201) along the main channel hole (201), the molten metal flows into the branch channel (202) opened at the bottom end of the main channel hole (201), and then the molten metal flows from the branch channel (202) to the gate (203), and the molten metal flows into the cavities in the first fixed mold plate (101) and the second fixed mold plate (103); S3: After die-casting is completed, the first fixed die plate (101) and the second fixed die plate (103) are separated, and then coolant is injected into the cooling pipeline (701) through the water outlet (702) to cool the cylinder body that has just been die-cast; S4: When the cylinder body needs to be ejected, gas is injected into the connecting pipe (605) through the air pump, and then gas is injected into the ejection pipe (301) through the connecting pipe (605). As the gas is injected, the sealing cap (302) gradually slides on the ejection pipe (301), stretching the first spring (3032). As the sealing cap (302) and the ejection pipe (301) are separated, the gas in the ejection pipe (301) flows out from the second through hole (500), and the die-cast engine cylinder body is ejected; S5: The ejector fixing plate (604) is moved so that the ejector fixing plate (604) slides on the first slide groove (602), driving the ejector tube (301) to slide on the first through hole (400), and then the ejector tube (301) drives the sealing cap (302) to completely eject the die-cast engine cylinder block.

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