Cooling mechanism for high-toughness light-weight zinc-aluminum alloy casting mold

Abstract

The invention discloses a cooling mechanism for a high-toughness light-weight zinc-aluminum alloy casting mold, and relates to the field of casting mold cooling displacement. A high-toughness light-weight zinc-aluminum alloy casting mold cooling mechanism comprises a forming box, a forming cavity is formed in the top of the forming box, a cooling cavity wrapping the forming cavity is formed in the forming box, and a composite cooling layer covering the outer side of the wall body of the forming cavity is installed on the inner wall of the cooling cavity. The composite cooling layer comprises an inner frame, a middle frame and an outer frame from inside to outside, through holes I are respectively formed in wall bodies of the inner frame, the middle frame and the outer frame, and the porosity of the through holes I is gradually reduced from the inner frame to the outer frame, so that a gradually-shrinking micro-channel network is formed; a cooling medium is guided in from the inner layer at a high speed through a gradually-reduced micro-channel of the composite cooling layer, and heat on the surface of the forming cavity is preferentially absorbed; by means of the porosity decreasing characteristic of the inner frame, the middle frame and the outer frame, a miniature channel is formed, the speed of flowing-out liquid is decreased from low to high, the contact time of the inner side is prolonged, and heat exchange of a high-heat-capacity area is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of mold cooling and displacement, and particularly relates to a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold. Background Art

[0002] Aluminum alloy is usually cast in the shape of an ingot when being poured. Because of its relatively high strength and light weight, it is used in many industries. When casting aluminum alloy, casting equipment is used. The casting equipment can melt aluminum alloy raw materials into molten aluminum and pour it into the interior of a mold, and then cool it to form an aluminum alloy profile. Usually, the molten aluminum is poured into the mold, and after it is formed, it is taken out. If it is taken out after natural cooling, it takes too much time, resulting in a large amount of time being wasted. The existing technology is to inject flowing cooling water between the outside of the forming box and the mold to accelerate the cooling of the molten aluminum and then take it out. However, the existing cooling and displacement have the following problems:

[0003] When cooling the mold, the contact area between the cooling water and the mold of the casting is small. At the same time, there is a certain distance between the outer wall of the casting mold and the casting groove, and the heat conduction distance is long, resulting in a low heat conduction coefficient, which affects the efficiency of cooling and taking out the casting mold. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the existing technology, and a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold is proposed.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold, including a forming box. A forming cavity is opened at the top of the forming box, and a cooling cavity surrounding the forming cavity is opened inside the forming box. A composite cooling layer covering the outer side of the wall of the forming cavity is installed on the inner wall of the cooling cavity. The composite cooling layer includes an inner frame, a middle frame and an outer frame from the inside to the outside. Through holes I are respectively opened on the wall bodies of the three, and the porosity decreases sequentially from the inner frame to the outer frame, forming a tapered microchannel network. The cooling medium is introduced at high speed from the inner layer through the tapered microchannels of the composite cooling layer to preferentially absorb the heat on the surface of the forming cavity.

[0007] A spiral diversion and turbulence mechanism is arranged between the inner frame and the middle frame, which is used to convert part of the cooling liquid into spiral flow and reversely inject it into the inner frame to impact the fluid in the stagnant area in the inner frame.

[0008] [[ID=

[0009] Preferably, through holes two are formed in the inner frame and are distributed in an annular array, located between the outer side of the aggregation cover and the annular plate.

[0010] Preferably, the aperture of the through hole two decreases sequentially from outside to inside, and the cross-sectional area of the compression flow channel is used to accelerate the flow velocity and rush into the inner frame to create turbulence.

[0011] Preferably, a liquid inlet two is formed at one end of the spiral flow guide shell, and a diversion groove communicated with the liquid inlet two is formed at the other end. During use, the input end of the liquid inlet two is connected to the output end of the transmission pipe.

[0012] Preferably, the diversion groove of the spiral flow guide shell is an arc-shaped spiral structure, its spiral angle is 30°-45°, and the width of the diversion groove decreases from the liquid inlet to the outlet direction, and the width ratio is 1:0.6-0.8.

[0013] Preferably, an annular groove is formed on the inner side of the top end of the forming box, and a main feed pipe is installed on the inner wall of the annular groove. The input end of the main feed pipe is connected to the output end of the liquid inlet pipe. A diversion pipe communicated with the main feed pipe is connected to the main feed pipe, and the output end of the diversion pipe is connected to a feed frame. The bottom output end of the feed frame corresponds to the outer wall of the forming box.

[0014] Preferably, L-shaped plates are installed on the outer wall of the shell of the forming cavity in an array distribution, and a vertical groove is formed between adjacent L-shaped plates. The top end of the vertical groove corresponds to the output end of the feed frame; the coolant is introduced into the vertical groove through the feed frame, and the coolant first contacts the outer wall of the forming cavity and the L-shaped plates for heat exchange.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention;

[0016] 1. For the cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold, through the porosity decreasing characteristics of the inner frame, the middle frame and the outer frame, a micro-scale channel is formed, and the velocity of the flowing liquid is changed from slow to fast, and the contact time is extended on the inner side to strengthen the heat exchange in the high heat capacity area (such as the gate);

[0017] 2. For the cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold, through the reverse vortex of the spiral flow guide shell impacting the stagnant area of the inner frame, the low-speed heat barrier is destroyed, the heat exchange efficiency is improved and local temperature rise is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings:

[0019] Figure 1 is the front view of a cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0020] Figure 2The Figure 1 Bottom view;

[0021] Figure 3 Front view of the forming box of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0022] Figure 4 The Figure 3 Exploded schematic diagram;

[0023] Figure 5 The Figure 3 Bottom view;

[0024] Figure 6 Inner frame cross-sectional view of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0025] Figure 7 Front view of the main feed pipe of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0026] Figure 8 The Figure 3 Side cross-sectional view;

[0027] Figure 9 Cross-sectional view of the spiral flow guide shell of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0028] Figure 10 Front view of the forming cavity of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0029] Figure 11 Side view of the forming cavity of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0030] Figure 12 Schematic diagram of the rotation of the vertical plate of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0031] Figure 13 Front view of the vertical plate of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0032] Figure 14 The Figure 13 Schematic diagram of the rotation of the middle vertical plate;

[0033] Figure 15 Schematic diagram of the electrical connection of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention;

[0034] Figure 16 Schematic diagram of the operation process of an electric telescopic rod of a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold proposed by the present invention.

[0035] In the figure: 101, upper mold; 102, lower mold; 103, installation groove; 2, forming box; 201, annular groove; 202, main feed pipe; 203, shunt pipe; 204, feed frame; 3, forming cavity; 4, cooling cavity; 501, L-shaped plate; 502, vertical groove; 503, empty groove; 504, rotating shaft; 505, cross plate; 506, vertical plate; 507, electric telescopic rod; 6, inner frame; 601, through hole one; 602, through hole two; 603, annular plate; 604, inner pipe; 605, gathering hood; 606, transmission pipe; 607, spiral flow guide shell; 608, second liquid inlet; 609, shunt groove; 7, middle frame; 8, outer frame; 9, flow guide pipe; 11, phase change material capsule; 12, heat dissipation fins. Specific embodiments

[0036] The following further describes the present invention in detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0037] It should be understood that terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] In the description of the present invention, the orientation or positional relationship indicated by terms such as "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0039] Example 1: Refer to Figures 1-14 , a cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold, including a mold, the mold includes an upper mold 101 and a lower mold 102, an installation groove 103 is opened on the lower mold 102, a forming box 2 is installed in the installation groove 103, a forming cavity 3 is opened on the forming box 2, and a cooling cavity 4 is opened inside the forming box 2 around the forming cavity 3;

[0040] The lower mold 102 is provided with an inflow port and an outflow port. A diversion pipe 9 is installed in the outflow port, and a liquid inlet pipe is installed on the inflow port. Both the diversion pipe 9 and the liquid inlet pipe pass through the lower mold 102 and are connected to the molding box 2.

[0041] During use: The molding box 2 is fixedly installed in the installation groove 103, and both the liquid inlet pipe and the diversion pipe 9 are connected to and communicate with the molding box 2.

[0042] During operation: The upper mold 101 and the lower mold 102 are closed to form a whole. The coolant is introduced through the liquid inlet pipe, exported through the diversion pipe 9, and the molten alloy material is poured into the molding cavity 3 of the molding box 2 through the feeding pipe on the upper mold 101. The material in the molding cavity 3 conducts heat to the wall of the molding cavity 3 and exchanges heat with the coolant wrapped on the outside, so as to cool it down and accelerate the molding.

[0043] In the above technical solution, the problem is that generally, both the diversion pipe 9 and the liquid inlet pipe are installed on the side wall of the molding box 2. Therefore, both the water inlet and the water outlet are located outside the cooling cavity 4, and the coolant inside the cooling cavity 4 is the one that directly contacts and exchanges heat with the molding cavity 3. The water flow outside the cooling cavity 4 is greater than the water flow inside, and the coolant that has not been fully heat-exchanged outside is exported, resulting in the accumulation and non-flow or small flow of the coolant after heat exchange inside the cooling cavity 4, which is likely to generate heat accumulation and affect the heat exchange and cooling efficiency. Based on the above technical problems, the inventor of the present application found that the liquid inlet can be set above the outer wall of the molding cavity 3, while the diversion pipe 9 is still installed on the side wall of the molding cavity 3. Please refer to the appendix Figure 4 , so that the coolant first contacts and exchanges heat with the outer wall of the molding cavity 3 and then is transmitted outward.

[0044] Specifically: An annular groove 201 is opened on the inner side of the top end of the molding box 2. The inner wall of the annular groove 201 is provided with a main feeding pipe 202. The input end of the main feeding pipe 202 is connected to the output end of the liquid inlet pipe. A shunt pipe 203 communicating with it is connected to the main feeding pipe 202. The output end of the shunt pipe 203 is connected to a feeding frame 204, and the bottom output end of the feeding frame 204 corresponds to the outer wall of the molding box 2.

[0045] During use, the liquid inlet pipe passes through the lower mold 102 and extends into the annular groove 201 to be connected to the main feeding pipe 202. The coolant is transmitted through the liquid inlet pipe to the main feeding pipe 202, is shunted by the main feeding pipe 202, is transmitted through the shunt pipe 203 to the feeding frame 204 and then introduced into the cooling cavity 4, first contacts and exchanges heat with the outer wall of the molding cavity 3, and then is exported by the diversion pipe 9.

[0046] However, further, when the inventors of the present application were in actual use, they found a problem: when the newly introduced cooling water enters, due to the influence of the fluidity generated by the water flow, the contact ratio with the outer wall of the housing of the molding cavity 3 is not high. For this reason, L-shaped plates 501 are arranged in an array on the outer wall of the housing of the molding cavity 3, and a vertical groove 502 is formed between adjacent L-shaped plates 501. The top of the vertical groove 502 corresponds to the output end of the feeding frame 204; the coolant is introduced into the vertical groove 502 through the feeding frame 204. First, the coolant contacts the outer wall of the molding cavity 3 and the L-shaped plates 501 for heat exchange, increasing the heat dissipation area and improving the heat exchange efficiency;

[0047] However, further, when the inventors of the present application were in actual use, they found a problem: the coolant flows from the inside to the outside, and it is a homogeneous channel with a uniform outflow speed during transmission. In the homogeneous channel, the cooling medium is prone to form a laminar flow (Reynolds number Re < 2000), the thermal boundary layer thickens, and the heat transfer coefficient is low; based on the above technical problems, the inventors of the present application found that an inner frame 6, a middle frame 7, and an outer frame 8 can be provided in the cooling cavity 4. The outer frame 8 is the wall body of the cooling cavity 4. Through holes 601 are provided on the inner frame 6, the middle frame 7, and the outer frame 8. The porosity of the three groups of through holes 601 decreases sequentially from the inside to the outside, forming a tapered microchannel network. When the through holes 601 on the inner frame 6, the middle frame 7, and the outer frame 8 are led out, the speeds are all different and increase from the inside to the outside. The cooling medium is introduced into the microchannel. The medium flow rate is accelerated through the tapered structure, improving the heat dissipation efficiency in the high-temperature area. The pore gradient distribution matches the mold temperature field. The high-porosity area (near the cavity) enhances heat exchange, and the low-porosity area (outer layer) improves the structural strength, reducing the thermal expansion difference and avoiding stress concentration;

[0048] Furthermore, there are the following problems during use: the coolant is transmitted to the middle frame 7 through the through hole 601 on the inner frame 6. Although the fluid in the inner frame 6 area has contacted the wall of the forming groove, due to the low flow rate, a low-speed retention area is easily formed in the cooling groove, causing the fluid in the retention area to continuously absorb heat and heat up. After its own heat capacity is saturated, it cannot effectively take away the heat, forming a local "thermal barrier" to hinder the subsequent coolant from contacting the wall surface; Based on the above technical problems, the inventors of the present application found that it is possible to install an annular plate 603 between the inner frame 6 and the middle frame 7, and the two ends of the annular plate 603 are fixedly connected to the outer side of the inner frame 6 and the inner side of the middle frame 7 respectively, and a gathering cover 605 is provided on the inner side of the annular plate 603. The gathering cover 605 covers the outer side of the inner frame 6, and its input end corresponds to the through hole 601 opened on the inner frame 6 covered by the annular plate 603. A second through hole 602 is provided on the inner frame 6 between the outer side of 05 and the inner side of the annular plate 603. The aperture of the second through hole 602 decreases from the outside to the inside. The output end of the gathering cover 605 is connected to the transmission pipe 606, and the output end of the transmission pipe 606 is connected to the spiral guide shell 607. Part of the coolant in the inner frame 6 is introduced into the gathering cover 605 through the through hole 1 601 covered by the gathering cover 605, and is transmitted to the spiral guide shell 607 through the transmission pipe 606. The transmitted liquid forms a spiral motion during the flow through the spiral guide shell 607, collides with the outer wall of the inner frame 6, and is transmitted to the inner frame 6 through the channel with an outer width and an inner contraction of the second through hole 602. The vortex ring generated by the spiral guide shell 607 carries high kinetic energy and is injected into the inner flow field in a tangential rotation + reverse motion mode to impact the inner retention area.

[0049] Specifically, a second liquid inlet 608 is provided at one end of the spiral guide shell 607, and a diverter groove 609 communicating with the second liquid inlet 608 is provided on the outer side of the other end. When in use, the input end of the second liquid inlet 608 is connected to the output end of the transmission tube 606, and the liquid is transmitted through the second liquid inlet 608 to the arc-shaped diverter groove 609, and is guided by the diverter groove 609 to form a spiral transmission;

[0050] Furthermore, a through hole may be provided on the wall of the annular plate 603 near the inner frame 6, with the hole diameter decreasing from the inside to the outside. A portion of the liquid discharged from the spiral guide shell 607 is also discharged into the middle frame 7 through the hole provided on the annular plate 603, where it impacts the liquid inside the middle frame 7, thereby forming turbulent flow in the liquid inside the middle frame 7, thereby avoiding local temperature rise and improving efficiency.

[0051] By configuring the annular plate 603 and the second through-hole 602 as channels with decreasing diameters, the probability of the liquid in the inner frame 6 and the middle frame 7 entering through these two sets of holes is reduced. Instead, the liquid spirally transported in the annular plate 603 can be compressed through the two sets of progressively increasing channels, increasing the flow rate and water pressure, and entering the inner frame 6 and the middle frame 7. The liquid impacts the liquid in the two sets of progressively increasing channels, forming turbulence, breaking down the flow barriers, and preventing localized temperature rise.

[0052] The specific path is as follows: the coolant is introduced from the liquid inlet pipe through the feed main pipe 202 and the diverter pipe 203 into the feed frame 204, flows along the vertical groove 502 formed by the L-shaped plate 501 on the outer wall of the molding cavity 3, flows into the cooling cavity 4, passes through the tapered microchannels of the inner frame 6, the middle frame 7 and the outer frame 8 in sequence, and is finally discharged through the guide pipe 9;

[0053] Example 2: Reference Figures 11-16 , which is basically the same as Example 1. The above scheme also has a problem that the newly entered coolant is transmitted in the vertical groove 502 composed of the L-shaped plate 501. The contact distance and time between the entering coolant and the outer wall of the forming cavity 3 in the vertical groove 502 are fixed. The temperature of the aluminum alloy material just cast in the early stage is high, and the heat can be quickly conducted to the wall of the forming cavity 3 and the L-shaped plate 501. The flowing coolant takes out the heat, but as time goes by, the temperature of the aluminum alloy material gradually decreases, and the temperature conducted to the wall of the forming cavity 3 will decrease. If the flow continues, the efficiency of heat exchange between the liquid in the vertical groove 502 and it will decrease. Furthermore, a flow blocking group is set in the vertical groove 502, and the flow blocking group is provided with three vertical plates 506 distributed in a triangular pattern. The vertical plates 506 are in a vertical state at high temperature. As the temperature of the wall of the forming cavity 3 decreases, the vertical plates 506 rotate, and the final form is a horizontal state rotated ninety degrees.

[0054] The vertical plate 506 slowly rotates as the temperature drops, and the inclined vertical plate 506 blocks the liquid flowing in the vertical groove 502, thereby extending the heat exchange time. At the same time, the flowing coolant is dispersed, so that the coolant can fully exchange heat with the molding cavity 3 and the L-shaped plate 501, thereby achieving automatic adjustment with the temperature and expanding the scope of use;

[0055] Specifically, a slot 503 is provided in the wall of the molding cavity 3. A rotating shaft 504 is rotatably connected to the front end of the inner wall of the slot 503. The two ends of the rotating shaft 504 are respectively connected to a vertical plate 506 and a horizontal plate 505. The inner wall of the slot 503 is installed with an electric telescopic rod 507. The top end of the electric telescopic rod 507 is rotatably connected to the inner wall of the slot 503 and the corner of the horizontal plate 505. A temperature sensor is embedded in the wall of the molding cavity 3. The temperature sensor is electrically connected to a controller. A temperature range is set. The controller controls the extension and retraction of the electric telescopic rod 507 according to the temperature.

[0056] Initially: the horizontal plate 505 is in a vertical position and the vertical plate 506 is in a horizontal position;

[0057] The controller is set to a temperature range, and when the temperature reaches the corresponding temperature range, the electric telescopic rod 507 is controlled to extend or retract the corresponding length;

[0058] For example: The temperature of the aluminum alloy melting is between 650 and 750, and there may be differences when it is conducted to the wall of the forming cavity, which should be around 600 to 700. The wall temperature is detected by an embedded temperature sensor.

[0059] When the detected temperature is greater than 400, control the electric telescopic rod to extend, and the cross plate 505 rotates 90 degrees to be horizontal, and the vertical plate 506 is in a vertical state.

[0060] When the detected temperature is between 200 and 400 degrees, control the electric telescopic rod to start contracting, driving the cross plate 505 to rotate 10 degrees back to its original position.

[0061] When the detected temperature is between 100 and 200 degrees, control the electric telescopic rod to start contracting, driving the cross plate 505 to rotate 35 degrees back to its original position again.

[0062] When the detected temperature is below 100 degrees, control the electric telescopic rod to contract, driving the cross plate 505 to rotate 45 degrees back to its original position again, so that the cross plate 505 returns to its initial vertical state.

[0063] Example 3: Refer to Figure 10 , which is basically the same as Example 1. Furthermore: Heat dissipation fins 12 are provided at the four corners on the outer side of the wall of the forming cavity 3. A micro heat pipe is connected to the inner side of the heat dissipation fin 12, and the micro heat pipe is installed in the wall of the forming cavity 3. At the same time, phase change material capsules 11 are embedded at the four corners in the wall of the forming cavity 3. Heat is stored through the phase change of the phase change material capsules 11 (latent heat absorption), delaying the temperature rise of the wall. When the temperature is low, the stored heat is released and taken away by the flowing coolant, avoiding the uneven problem of "excessive cold in the early stage and insufficient in the later stage" in traditional cooling.

[0064] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made. These are all equivalent modifications and evolutions of the above embodiments based on the essence of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold, comprising a forming box (2), wherein a forming cavity (3) is formed at the top of the forming box (2), and it is characterized in that, A cooling cavity (4) that encloses a molding cavity (3) is formed inside the molding box (2). A composite cooling layer that covers the outer side of the wall of the molding cavity (3) is installed on the inner wall of the cooling cavity (4). The composite cooling layer includes an inner frame (6), a middle frame (7), and an outer frame (8) from the inside out. Through holes one (601) are respectively formed on the walls of the three, and their porosity decreases in sequence from the inner frame to the outer frame, forming a tapered microchannel network; the cooling medium is rapidly exported from the inner layer through the tapered microchannels of the composite cooling layer; A spiral diversion and turbulence mechanism is arranged between the inner frame (6) and the middle frame (7) for converting part of the coolant into spiral flow and reversely injecting it into the inner frame (6) to impact the fluid in the stagnant area inside the inner frame (6).

2. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 1, characterized in that The spiral diversion and turbulence mechanism includes: an annular plate (603) is arranged between the inner frame (6) and the middle frame (7), a gathering cover (605) is connected and arranged on the inner side of the annular plate (603), the gathering cover (605) is connected to the outer side of the inner frame (6), and the output end of the gathering cover (605) is connected with a spiral diversion shell (607) through a transmission pipe (606) for converting part of the coolant into spiral flow and reversely injecting it into the inner frame to impact the stagnant area fluid.

3. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 2, characterized in that, Through holes two (602) are formed on the inner frame (6) and are distributed in an annular and integral arrangement, located between the outer side of the gathering cover (605) and the annular plate (603).

4. A cooling mechanism for a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 3, characterized in that, The aperture of the through hole two (602) decreases in sequence from the outside to the inside, and the flow velocity is accelerated by compressing the flow channel cross-sectional area to rush into the inner frame (6) to create turbulence.

5. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 4, characterized in that, One end of the spiral diversion shell (607) is provided with a liquid inlet two (608), and the other end is provided with a diversion groove (609) communicated with the liquid inlet two (608). During use, the input end of the liquid inlet two (608) is connected to the output end of the transmission pipe (606).

6. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 5, characterized in that The diversion groove (609) of the spiral diversion shell (607) is an arc-shaped spiral structure, its spiral angle is 30° - 45°, and the width of the diversion groove (609) decreases from the liquid inlet (608) to the outlet direction, and the width ratio is 1:0.6 - 0.

8.

7. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 6, characterized in that An annular groove (201) is formed inside the top end of the molding box (2). A feed main pipe (202) is installed on the inner wall of the annular groove (201). The input end of the feed main pipe (202) is connected to the output end of the liquid inlet pipe. A diversion pipe (203) communicated with it is connected to the feed main pipe (202). The output end of the diversion pipe (203) is connected to a feed frame (204), and the bottom output end of the feed frame (204) corresponds to the outer wall of the molding box (2).

8. The cooling mechanism of a high-strength, tough and lightweight zinc-aluminum alloy casting mold according to claim 7, characterized in that L-shaped plates (501) are arranged in an array on the outer wall of the shell of the molding cavity (3). Vertical grooves (502) are formed between adjacent L-shaped plates (501), and the top end of the vertical groove (502) corresponds to the output end of the feed frame (204); the coolant is introduced into the vertical groove (502) through the feed frame (204), and the coolant first contacts the outer wall of the molding cavity (3) and the L-shaped plates (501) for heat exchange.

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