A fast cooling structure for hot spots of a die-casting mold

Abstract

The present invention relates to the technical field of die-casting molds, and discloses a fast cooling structure for the hot node of the die-casting mold, including a first fixed mold block and a second fixed mold block, wherein the bottom surface of the first fixed mold block is an upper fitting surface, and the top surface of the second fixed mold block is a lower fitting surface, the shape of the upper fitting surface is the same as the shape of the die-casting mold cavity, and the lower fitting surface is tightly fitted with the upper fitting surface. In the prior art, there is a phenomenon that the cooling efficiency of the hot node area of ​​the product is lower than the cooling efficiency of other parts of the product, resulting in a technical problem of low product yield rate due to uneven cooling efficiency of various parts of the product; the present invention can make the cooling efficiency of various areas of the product close to each other, thereby improving the product yield rate; the present invention designs the cooling tube to have an uneven pipe diameter according to the positional relationship between the cooling tube and the hot node area of ​​the product; the difference in cooling efficiency between the hot node area of ​​the product and other areas can be small, thereby improving the quality of the product after output.

Description

Technical Field

[0001] The invention relates to the technical field of die casting moulds, and in particular to a hot node rapid cooling structure of a die casting mould. Background Art

[0002] A hot spot is an effect produced during the casting process. A hot spot in a casting refers to a node or local area in the casting where the solidification is slower than that of the surrounding metal during the solidification process of the molten iron. It can also be said to be the last place to cool and solidify. The solidification time of the molten iron at each point in the mold cavity is not equal, which will produce thermal stress in the casting after solidification, causing deformation and cracks in the casting. At the same time, due to the different cooling and solidification times, the casting will have defects such as shrinkage, shrinkage holes, cold shuts, and pores.

[0003] In the process of producing products by die-casting molds in the prior art, there is a phenomenon that the cooling efficiency of the hot zone of the product is lower than the cooling efficiency of other parts of the product, resulting in a technical problem of low product yield due to uneven cooling efficiency of various parts of the product.

[0004] The invention patent with publication number CN108262459A: A structure for rapid cooling of the hot section of a die-casting mold, which discloses a technical solution for rapidly cooling the hot section of a product by setting a water-blocking plate in the cooling cavity to force cooling water to flow through the top, thereby expanding the contact area and increasing the water flow rate;

[0005] The utility model patent with publication number CN204075138U: Die-casting mold cooling mechanism, discloses a technical solution of making holes on the mold core and using an introduction block to introduce the cooling medium into the part with a heat node that needs to be cooled, thereby forming a circulating and local three-dimensional cooling structure;

[0006] Although the technical solutions of the above two patents can cool the hot nodes of products during the production process of die-casting molds, they cannot make the cooling efficiency of the hot nodes of products close to the cooling efficiency of other areas to improve product quality and yield rate. Therefore, people are in urgent need of a fast cooling structure for the hot nodes of die-casting molds to solve the problems existing in the prior art. Summary of the invention

[0007] The object of the present invention is to provide a fast cooling structure for a hot spot of a die-casting mold to solve the above-mentioned deficiencies in the prior art.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] The hot-spot rapid cooling structure of the die-casting mold comprises a movable mold, a fixed mold, and a die-casting mold cavity arranged on the fixed mold near the movable mold side; the characteristic is that the die-casting mold cavity comprises a first fixed mold assembly and a second fixed mold assembly, the bottom surface of the first fixed mold assembly is an upper fitting surface, the top surface of the second fixed mold assembly is a lower fitting surface, the shape of the upper fitting surface is the same as the shape of the die-casting mold cavity, and the lower fitting surface is tightly fitted with the upper fitting surface;

[0010] A cooling component is provided between the lower bonding surface and the upper bonding surface, and the cooling component plays a role in cooling the product and the hot zone of the product, and the cooling component includes a containing mechanism and a cooling mechanism;

[0011] The accommodating mechanism comprises a second tube groove provided on the surface of the upper fitting surface and a first tube groove provided on the surface of the second fixed mold block, wherein the second tube groove and the first tube groove are close to each other to form a cooling channel with a circular cross section;

[0012] The cooling mechanism comprises a cooling pipe tightly installed in the cooling channel, and the two ends of the cooling pipe are connected to an inlet fluid main pipe and an outlet fluid main pipe respectively; the end of the inlet fluid main pipe away from the cooling pipe is connected to an external cooling fluid, and the end of the outlet fluid main pipe away from the cooling pipe is connected to a negative pressure pump; the negative pressure pump extracts negative pressure from the flow path connected by the outlet fluid main pipe, the cooling pipe and the inlet fluid main pipe, so that the external cooling fluid carries away the heat close to the product area, so that the product and the product hot zone are quickly cooled;

[0013] The diameter of the cooling pipe close to the product hot zone is larger than the diameter of the cooling pipe far from the product hot zone; this can reduce the difference in cooling efficiency between the product hot zone and other zones, and improve the quality of the product after output.

[0014] As a preferred solution, an inner coolant pipe is installed inside the cooling pipe by using a connecting rod, a through hole is penetrated on the side wall of the inner coolant pipe, and the inner coolant pipe coincides with the axis of the cooling pipe; the end of the inner coolant pipe close to the outlet fluid main pipe is closed, and the end of the inner coolant pipe close to the inlet fluid main pipe penetrates the inlet fluid main pipe and is connected to a container containing coolant;

[0015] The end of the fluid inlet main pipe away from the cooling pipe is connected to the outside air;

[0016] By adopting the above technical scheme, the negative pressure pump extracts high negative pressure from the flow path connected to the outlet fluid main pipe, the cooling pipe and the inlet fluid main pipe, and forms negative pressure suction inside the inner coolant pipe. Under the influence of negative pressure, the coolant flows from the container into the inner coolant pipe, and then sprays out from the through hole in the form of mist. The mist coolant mixes with air. By utilizing the compressibility of air, when the coolant is heated and vaporized, the air can be compressed to provide a holding space for the vaporized coolant, avoiding the generation of high pressure in the cooling pipe, which is beneficial to the maintenance of the die-casting mold and prolonging the service life; at the same time, it can ensure production safety; compared with the cooling method using pure coolant as the cooling medium, this scheme has low requirements on the type of coolant, and water can be used as the coolant, which is low in cost; and the safety factor is high in the cooling process; the cooling efficiency is high, thereby making the product output efficiency high.

[0017] As a preferred solution, the cooling mechanism further comprises a high temperature resistant cooling hose, the straight portion of the cooling hose away from the hot zone is cut, the cut portion is connected by the high temperature resistant cooling hose, the lower fitting surface is provided with a hose movable groove near the high temperature resistant cooling hose area, and the high temperature resistant cooling hose is located inside the hose movable groove;

[0018] As a preferred solution, the end of the high temperature resistant cooling hose close to the fluid inlet main pipe is fixedly connected to the cross section on one side of the cooling pipe; the end of the high temperature resistant cooling hose close to the fluid outlet main pipe is slidably embedded in the pipe opening of the cross section on the other side of the cooling pipe;

[0019] By adopting the above technical scheme, the high temperature resistant cooling hose is elastically shaped before being installed, so that after the high temperature resistant cooling hose is installed, in a natural state without external force, the middle part of the high temperature resistant cooling hose bends away from the product. In product production, when entering the product cooling link, because the middle part of the high temperature resistant cooling hose bends away from the product, the heat exchange efficiency between the high temperature resistant cooling hose area and the product is lower than the heat exchange efficiency between the cooling pipe and the product. Therefore, the heat carrying efficiency of the non-hot node area of ​​the product close to the high temperature resistant cooling hose area is lower than the heat carrying efficiency of the hot node area of ​​the product far from the high temperature resistant cooling hose area. In the prior art, there is a technical problem that the cooling efficiency of the hot node area is lower than the cooling efficiency of other parts of the product, resulting in a technical problem of low product yield due to uneven cooling efficiency of various parts of the product. Therefore, the above scheme can make the cooling efficiency of various regions of the product close to each other, thereby improving the product yield.

[0020] The above technical solution also has the following beneficial effects: when it is necessary to improve the cooling efficiency of the product, the power of the negative pressure pump is increased, the circulation efficiency of the coolant and air inside the cooling pipe and the high-temperature resistant cooling hose is improved, and the cooling of the product is accelerated. In this process, the inside of the high-temperature resistant cooling hose is subjected to different degrees of negative pressure, and the high-temperature resistant cooling hose will produce a deformation inversely proportional to the negative pressure value. The deformation method is to reduce the degree of bending. The smaller the degree of bending, the closer the high-temperature resistant cooling hose is to the product, which can avoid the situation where the cooling efficiency of the non-hot node area and the cooling efficiency of the hot node area are widened when the cooling efficiency of the product needs to be improved.

[0021] As a preferred solution, a cross-shaped water retaining member is integrally formed inside the through hole, so that the coolant sucked out from the through hole can be more easily presented in a mist form.

[0022] As a preferred solution, the aperture of the through hole close to the thermal node of the product is larger than the aperture of the through hole far from the thermal node of the product, so that the cooling efficiency of each area of ​​the product as a whole is similar, thereby improving the product output quality.

[0023] As a preferred solution, the connecting rod is cylindrical, and the curved surface of the cylindrical side wall is used to reduce the resistance to the fluid, so that the fluid flows smoothly and the structure is not easily damaged by the impact of the fluid.

[0024] As a preferred solution, a sliding sleeve is fixedly sleeved on the outer tube wall of one end of the high-temperature resistant cooling hose close to the fluid outlet main pipe. The sliding sleeve is slidably connected to the inner tube wall of the cooling tube. The sliding sleeve is made of a hard material to facilitate maintaining the stability of the high-temperature resistant cooling hose sliding inside the cooling tube.

[0025] As a preferred solution, a mounting ring is fixedly installed on the inner wall of the cooling tube near the sliding sleeve area, and a tension spring is fixedly installed on the mounting ring near one end of the sliding sleeve. The tension spring is fixedly connected to the sliding sleeve near one end of the sliding sleeve. After cooling is completed, the deformation recovery force of the tension spring is utilized to assist the high-temperature resistant cooling hose to recover its deformation, thereby improving the overall stability of the structure.

[0026] As a preferred solution, a plurality of metal springs are fixedly installed in a circular array on the inner wall of the high temperature resistant cooling hose; when no external force is applied, the metal springs are bent away from the mounting ring; all the metal springs together limit the flow of the coolant inside the high temperature resistant cooling hose;

[0027] By adopting the above technical scheme, the shape change of the high-temperature resistant cooling hose can be more easily affected by the change of the negative pressure pump power; when the negative pressure pump power increases, the coolant flow rate inside the high-temperature resistant cooling hose increases, so that the impact force of the coolant on the surface of the metal spring away from the mounting ring increases, and the metal spring produces elastic deformation, resulting in a reduction in the coolant flow aperture in the center of the high-temperature resistant cooling hose, and then the negative pressure attraction force on the side of the metal spring close to the mounting ring increases, and the high-temperature resistant cooling hose can be effectively attracted to slide in the direction close to the mounting ring, and the high-temperature resistant cooling hose produces a shape change tending to be straightened.

[0028] As a preferred solution, a support mechanism is provided on one side of the bent convex surface of the metal spring sheet, and the support mechanism includes a slide rail fixedly mounted on the inner wall of the high-temperature resistant cooling hose, a slider is slidably mounted on the slide rail, and limited blocks are fixed at both ends of the slide rail to prevent the slider from leaving the slide rail track, and the slider is rotatably connected to a support rod at one end away from the inner wall of the high-temperature resistant cooling hose by a rotating shaft, and a connecting protrusion is fixed on the bent convex surface of the metal spring sheet, and the free end of the support rod is rotatably connected to the end of the connecting protrusion away from the metal spring sheet by a rotating shaft;

[0029] By adopting the above technical solution, when there is no external force acting on the metal shrapnel, the slider is located at the end of the slide rail close to one end of the metal shrapnel; the greater the flow rate of the coolant inside the high-temperature resistant cooling hose, the slider is subjected to force on the metal shrapnel, the connecting protrusion and the support rod in sequence, and the greater the distance the slider slides in the direction away from the metal shrapnel, until it slides to the end of the slide rail away from the metal shrapnel. At this time, the limit block at one end of the slide rail away from the metal shrapnel supports the metal shrapnel with the help of the slider, the support rod and the connecting protrusion, so as to avoid damage caused by excessive deformation of the metal shrapnel.

[0030] As a preferred solution, a rubber layer is fixedly attached to the outer wall of the sliding sleeve, which can improve the overall sealing effect of the pipeline.

[0031] As a preferred solution, the high temperature resistant cooling hose is a high temperature resistant silicone hose.

[0032] Beneficial effects:

[0033] In the above technical solution, the present invention provides a heat node rapid cooling structure for a die-casting mold, which uses a negative pressure pump to extract negative pressure from a flow path connected to the outlet fluid main pipe, the cooling pipe, and the inlet fluid main pipe, so that the external cooling fluid carries away the heat near the product area, and the product and the product heat node area can be quickly cooled;

[0034] The present invention designs the cooling pipe to have an uneven pipe diameter according to the positional relationship between the cooling pipe and the product hot zone, which can reduce the difference in cooling efficiency between the product hot zone and other zones, and improve the quality of the product after output.

[0035] In the present invention, the negative pressure pump extracts high negative pressure on the flow path connected to the outlet fluid main pipe, the cooling pipe and the inlet fluid main pipe, and forms negative pressure suction on the inside of the inner cooling liquid pipe. Under the influence of the negative pressure, the coolant flows from the container into the inner cooling liquid pipe, and then sprays out from the through hole in the form of mist. The mist coolant is mixed with air. By utilizing the compressibility of air, when the coolant is heated and vaporized, the air can be compressed to provide a holding space for the vaporized coolant, thereby avoiding the generation of high pressure in the cooling pipe, facilitating the maintenance of the die-casting mold and extending the service life; at the same time, it can ensure production safety; compared with the cooling method using pure coolant as the cooling medium, this scheme has low requirements on the type of coolant, and water can be used as the coolant, which is low in cost; and the safety factor is high in the cooling process; the cooling efficiency is high, thereby making the product output efficiency high.

[0036] In the prior art, the cooling efficiency of the hot zone of the product is lower than that of other parts of the product, resulting in a technical problem of low product yield due to uneven cooling efficiency of various parts of the product. The present invention can make the cooling efficiency of various areas of the product as a whole close, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0038] Figure 1 The overall structural diagram provided for embodiments 1 and 2 of the present invention;

[0039] Figure 2 The overall structure disassembly diagram provided for Example 1 of the present invention;

[0040] Figure 3 Provided in Example 1 of the present invention Figure 2 Further structural disassembly diagram of ;

[0041] Figure 4 The overall structure disassembly diagram provided for Example 2 of the present invention;

[0042] Figure 5 A disassembled diagram of the overall structure provided in embodiments 1 and 2 of the present invention from an oblique upward view;

[0043] Figure 6 A right side cross-sectional view of a high temperature resistant cooling hose area provided in Example 2 of the present invention;

[0044] Figure 7 A right side cross-sectional view of a portion of a cooling pipe provided in Example 1 of the present invention;

[0045] Figure 8 Provided for Example 2 of the present invention Figure 6 A magnified image of area A;

[0046] Fig. 9 Provided for Example 2 of the present invention Figure 4 Enlarged view of area B;

[0047] Fig.10 A cross-sectional view of the high temperature resistant cooling hose provided in Example 3 of the present invention in the front view direction near the metal spring area;

[0048] Fig.11 A cross-sectional view of a metal spring provided in Example 3 of the present invention under the impact of coolant;

[0049] Fig.12 Provided in Example 3 of the present invention Fig.11 Enlarged view of area C.

[0050] Description of reference numerals:

[0051] 101, movable mold; 102, fixed mold; 103, die-casting mold cavity; 201, first fixed mold assembly; 202, second fixed mold assembly; 203, upper fitting surface; 204, lower fitting surface; 205, first pipe groove; 206, second pipe groove; 207, cooling pipe; 208, fluid inlet main pipe; 209, fluid outlet main pipe; 301, internal coolant pipe; 302, through hole; 303, connecting rod; 401, flexible hose movable groove; 402, high temperature resistant cooling hose; 403, sliding sleeve; 404, mounting ring; 405, tension spring; 501, metal spring; 502, slide rail; 503, slider; 504, support rod; 505, connecting protrusion. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] Embodiment 1, as Figure 1 , 2 As shown in , 3, 5, and 7, the hot-spot rapid cooling structure of the die-casting mold provided in this embodiment comprises a movable mold 101, a fixed mold 102, and a die-casting mold cavity 103 arranged on the fixed mold 102 near the movable mold 101; it is characterized in that: the die-casting mold cavity 103 comprises a first fixed mold assembly 201 and a second fixed mold assembly 202, the bottom surface of the first fixed mold assembly 201 is an upper fitting surface 203, the top surface of the second fixed mold assembly 202 is a lower fitting surface 204, the shape of the upper fitting surface 203 is the same as that of the die-casting mold cavity 103, and the lower fitting surface 204 is tightly fitted with the upper fitting surface 203;

[0054] A cooling component is provided between the lower bonding surface 204 and the upper bonding surface 203. The cooling component plays a role in cooling the product and the hot zone of the product. The cooling component includes a containing mechanism and a cooling mechanism.

[0055] The accommodating mechanism includes a second tube groove 206 opened on the surface of the upper fitting surface 203 and a first tube groove 205 opened on the surface of the second fixed mold block 202. The second tube groove 206 and the first tube groove 205 are close to each other to form a cooling channel with a circular cross section.

[0056] The cooling mechanism includes a cooling pipe 207 tightly installed in the cooling channel, and the two ends of the cooling pipe 207 are connected to an inlet fluid main pipe 208 and an outlet fluid main pipe 209 respectively; the end of the inlet fluid main pipe 208 away from the cooling pipe 207 is connected to an external cooling fluid, and the end of the outlet fluid main pipe 209 away from the cooling pipe 207 is connected to a negative pressure pump; the negative pressure pump extracts negative pressure from the flow path commonly connected to the outlet fluid main pipe 209, the cooling pipe 207, and the inlet fluid main pipe 208, so that the external cooling fluid carries away the heat close to the product area, so that the product and the product hot zone are quickly cooled;

[0057] The diameter of the cooling tube 207 close to the product heat node area is larger than the diameter of the cooling tube 207 far from the product heat node area; this can reduce the difference in cooling efficiency between the product heat node area and other areas, and improve the quality of the product after output.

[0058] An inner coolant pipe 301 is installed inside the cooling pipe 207 by using a connecting rod 303. A through hole 302 is formed on the side wall of the inner coolant pipe 301. The inner coolant pipe 301 coincides with the axis of the cooling pipe 207. The end of the inner coolant pipe 301 close to the outlet fluid main pipe 209 is closed. The end of the inner coolant pipe 301 close to the inlet fluid main pipe 208 penetrates the inlet fluid main pipe 208 and is connected to a container containing coolant.

[0059] The end of the fluid inlet main pipe 208 away from the cooling pipe 207 is connected to the outside air;

[0060] The negative pressure pump extracts high negative pressure from the flow path connected to the outlet fluid main pipe 209, the cooling pipe 207, and the inlet fluid main pipe 208, and forms negative pressure suction inside the inner cooling liquid pipe 301. Under the influence of the negative pressure, the coolant flows from the container into the inner cooling liquid pipe 301, and then sprays out from the through hole 302 in the form of mist. The mist coolant mixes with the air. By utilizing the compressibility of air, when the coolant is heated and vaporized, the air can be compressed to provide a space for the vaporized coolant, avoiding the generation of high pressure in the cooling pipe 207, which is beneficial to the maintenance of the die-casting mold and prolongs the service life; at the same time, it can ensure production safety; compared with the cooling method using pure coolant as the cooling medium, this solution has low requirements on the type of coolant, and water can be used as the coolant, which is low in cost; and the safety factor is high during the cooling process; the cooling efficiency is high, thereby making the product output efficiency high.

[0061] A cross-shaped water retaining member is integrally formed inside the through hole 302 , so that the coolant sucked out from the through hole 302 can be more easily presented in a mist form.

[0062] The aperture of the through hole 302 near the hot node of the product is larger than that of the through hole 302 far from the hot node of the product, so that the cooling efficiency of each area of ​​the whole product is similar, thereby improving the output quality of the product.

[0063] The connecting rod 303 is cylindrical, and utilizes the arc surface of the cylindrical side wall to reduce the resistance to the fluid, so that the fluid flows smoothly and the structure is not easily damaged by the impact of the fluid.

[0064] Embodiment 2, as Figure 1 , 4 As shown in , 5, 6, 8, and 9, the hot-spot rapid cooling structure of the die-casting mold provided in this embodiment comprises a movable mold 101, a fixed mold 102, and a die-casting mold cavity 103 arranged on the fixed mold 102 near the movable mold 101; it is characterized in that: the die-casting mold cavity 103 comprises a first fixed mold assembly 201 and a second fixed mold assembly 202, the bottom surface of the first fixed mold assembly 201 is an upper fitting surface 203, the top surface of the second fixed mold assembly 202 is a lower fitting surface 204, the shape of the upper fitting surface 203 is the same as that of the die-casting mold cavity 103, and the lower fitting surface 204 is tightly fitted with the upper fitting surface 203;

[0065] A cooling component is provided between the lower bonding surface 204 and the upper bonding surface 203. The cooling component plays a role in cooling the product and the hot zone of the product. The cooling component includes a containing mechanism and a cooling mechanism.

[0066] The accommodating mechanism includes a second tube groove 206 opened on the surface of the upper fitting surface 203 and a first tube groove 205 opened on the surface of the second fixed mold block 202. The second tube groove 206 and the first tube groove 205 are close to each other to form a cooling channel with a circular cross section.

[0067] The cooling mechanism includes a cooling pipe 207 tightly installed in the cooling channel, and the two ends of the cooling pipe 207 are connected to an inlet fluid main pipe 208 and an outlet fluid main pipe 209 respectively; the end of the inlet fluid main pipe 208 away from the cooling pipe 207 is connected to an external cooling fluid, and the end of the outlet fluid main pipe 209 away from the cooling pipe 207 is connected to a negative pressure pump; the negative pressure pump extracts negative pressure from the flow path commonly connected to the outlet fluid main pipe 209, the cooling pipe 207, and the inlet fluid main pipe 208, so that the external cooling fluid carries away the heat close to the product area, so that the product and the product hot zone are quickly cooled;

[0068] The diameter of the cooling tube 207 close to the product heat node area is larger than the diameter of the cooling tube 207 far from the product heat node area; this can reduce the difference in cooling efficiency between the product heat node area and other areas, and improve the quality of the product after output.

[0069] The cooling mechanism also includes a high temperature resistant cooling hose 402. The straight portion of the cooling tube 207 away from the hot zone is cut, and the cut portion is connected by the high temperature resistant cooling hose 402. A hose movable groove 401 is provided near the high temperature resistant cooling hose 402 on the lower fitting surface 204. The high temperature resistant cooling hose 402 is located inside the hose movable groove 401.

[0070] One end of the high temperature resistant cooling hose 402 close to the fluid inlet main pipe 208 is fixedly connected to the cross section of one side of the cooling pipe 207; one end of the high temperature resistant cooling hose 402 close to the fluid outlet main pipe 209 is slidably embedded in the pipe opening of the cross section of the other side of the cooling pipe 207;

[0071] The high temperature resistant cooling hose 402 is elastically shaped before being installed, so that after the high temperature resistant cooling hose 402 is installed, in a natural state without external force, the middle part of the high temperature resistant cooling hose 402 bends away from the product. In product production, when entering the product cooling link, because the middle part of the high temperature resistant cooling hose 402 bends away from the product, the heat exchange efficiency between the high temperature resistant cooling hose 402 area and the product is lower than the heat exchange efficiency between the cooling pipe 207 and the product. Therefore, the heat carrying efficiency of the non-thermal node area of ​​the product close to the high temperature resistant cooling hose 402 area is lower than the heat carrying efficiency of the hot node area of ​​the product far from the high temperature resistant cooling hose 402 area. In the prior art, there is a technical problem that the cooling efficiency of the hot node area is lower than the cooling efficiency of other parts of the product, resulting in a technical problem of low product yield due to uneven cooling efficiency of various parts of the product. Therefore, the above scheme can make the cooling efficiency of various areas of the product close to each other, thereby improving the product yield.

[0072] The above technical solution also has the following beneficial effects: when it is necessary to improve the cooling efficiency of the product, the power of the negative pressure pump is increased, the circulation efficiency of the coolant and air inside the cooling pipe 207 and the high-temperature resistant cooling hose 402 is improved, and the cooling of the product is accelerated. In this process, the inside of the high-temperature resistant cooling hose 402 is subjected to different degrees of negative pressure, and the high-temperature resistant cooling hose 402 will produce a deformation inversely proportional to the negative pressure value. The deformation is in the form of reducing the degree of bending. The smaller the degree of bending, the closer the high-temperature resistant cooling hose 402 is to the product, which can avoid the situation where the cooling efficiency of the non-hot node area and the cooling efficiency of the hot node area are widened when the cooling efficiency of the product needs to be improved.

[0073] A sliding sleeve 403 is fixedly sleeved on the outer tube wall of the high-temperature resistant cooling hose 402 near the fluid outlet main pipe 209. The sliding sleeve 403 is slidably connected to the inner tube wall of the cooling tube 207. The sliding sleeve 403 is made of a hard material to maintain the stability of the high-temperature resistant cooling hose 402 sliding inside the cooling tube 207.

[0074] A mounting ring 404 is fixedly installed on the inner wall of the cooling tube 207 near the sliding sleeve 403, and a tension spring 405 is fixedly installed on one end of the mounting ring 404 near the sliding sleeve 403. The tension spring 405 is fixedly connected to the sliding sleeve 403 at one end near the sliding sleeve 403. After cooling is completed, the deformation recovery force of the tension spring 405 is utilized to assist the high temperature resistant cooling hose 402 in recovering its deformation, thereby improving the overall stability of the structure.

[0075] A rubber layer is fixedly attached to the outer wall of the sliding sleeve 403, which can improve the overall sealing effect of the pipeline.

[0076] The high temperature resistant cooling hose 402 is a high temperature resistant silicone hose.

[0077] Embodiment 3, as Figure 8 , 10 As shown in FIG. 11, on the basis of the technical solution in Example 2, the following technical solution is added: a plurality of metal springs 501 are fixedly installed in a circular array on the inner wall of the high-temperature resistant cooling hose 402; when no external force is applied, the metal springs 501 are bent away from the mounting ring 404; the force required for the metal springs 501 to deform toward the bent convex surface is less than the driving force caused by the flow of the coolant on the metal springs 501; all the metal springs 501 together limit the flow of the coolant inside the high-temperature resistant cooling hose 402;

[0078] By adopting the above technical scheme, the shape change of the high-temperature resistant cooling hose 402 can be more easily affected by the change of the negative pressure pump power; when the negative pressure pump power increases, the coolant flow rate inside the high-temperature resistant cooling hose 402 increases, so that the impact force of the coolant on the surface of the metal spring 501 away from the mounting ring 404 increases, and the metal spring 501 produces elastic deformation, resulting in a reduction in the coolant flow aperture in the center of the high-temperature resistant cooling hose 402, and then the negative pressure attraction on the side of the metal spring 501 close to the mounting ring 404 increases, and the high-temperature resistant cooling hose 402 can be effectively attracted and slid in the direction close to the mounting ring 404, and the high-temperature resistant cooling hose 402 produces a shape change tending to be straightened.

[0079] like Fig.12 As shown, a support mechanism is provided on one side of the bent convex surface of the metal spring 501, and the support mechanism includes a slide rail 502 fixedly installed on the inner wall of the high-temperature resistant cooling hose 402, a slider 503 is slidably installed on the slide rail 502, and limited blocks are fixed at both ends of the slide rail 502 to prevent the slider 503 from leaving the track of the slide rail 502, and the slider 503 is rotatably connected to the support rod 504 at one end away from the inner wall of the high-temperature resistant cooling hose 402 by a rotating shaft, and a connecting protrusion 505 is fixed on the bent convex surface of the metal spring 501, and the free end of the support rod 504 is rotatably connected to the end of the connecting protrusion 505 away from the metal spring 501 by a rotating shaft; when the metal spring 501 is not subjected to external force, the slider 503 is located on the slide rail 5 02 is close to one end of the metal spring 501; the greater the flow rate of the coolant inside the high-temperature resistant cooling hose 402, the greater the slider 503 is subjected to force on the metal spring 501, the connecting protrusion 505, and the support rod 504 in sequence, and the greater the sliding distance of the slider 503 in the direction away from the metal spring 501, until it slides to the end of the slide rail 502 away from the metal spring 501. At this time, the slide rail 502 is away from the limit block at one end of the metal spring 501, and with the help of the slider 503, the support rod 504, and the connecting protrusion 505, the metal spring 501 is supported to avoid damage caused by excessive deformation of the metal spring 501; the supporting mechanism supports and maintains the metal spring 501, thereby improving the durability of the metal spring 501.

[0080] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A heat node rapid cooling structure for a die-casting mold, comprising a movable mold (101), a fixed mold (102), and a die-casting mold cavity (103) arranged on the fixed mold (102) near the movable mold (101); characterized in that: The die-casting mold cavity (103) comprises a first fixed mold block (201) and a second fixed mold block (202); the bottom surface of the first fixed mold block (201) is an upper fitting surface (203); the top surface of the second fixed mold block (202) is a lower fitting surface (204); the shape of the upper fitting surface (203) is the same as that of the die-casting mold cavity (103); and the lower fitting surface (204) is tightly fitted with the upper fitting surface (203); A cooling component is provided between the lower bonding surface (204) and the upper bonding surface (203), and the cooling component comprises a containing mechanism and a cooling mechanism; The accommodating mechanism comprises a second tube groove (206) provided on the surface of the upper fitting surface (203) and a first tube groove (205) provided on the surface of the second fixed mold assembly (202), wherein the second tube groove (206) and the first tube groove (205) are close to each other to form a cooling channel with a circular cross section; The cooling mechanism comprises a cooling pipe (207) tightly installed in the cooling channel, and the two ends of the cooling pipe (207) are respectively connected to an inlet fluid main pipe (208) and an outlet fluid main pipe (209); one end of the inlet fluid main pipe (208) away from the cooling pipe (207) is connected to an external cooling fluid, and one end of the outlet fluid main pipe (209) away from the cooling pipe (207) is connected to a negative pressure pump; The diameter of the cooling tube (207) close to the product heat zone is larger than the diameter of the cooling tube (207) far from the product heat zone; The cooling mechanism further comprises a high temperature resistant cooling hose (402), wherein a straight portion of the cooling tube (207) away from the hot zone is cut, and the cut portion is connected and joined using the high temperature resistant cooling hose (402); a flexible hose movable groove (401) is provided in the lower fitting surface (204) near the high temperature resistant cooling hose (402), and the high temperature resistant cooling hose (402) is located inside the flexible hose movable groove (401); one end of the high temperature resistant cooling hose (402) near the fluid inlet main pipe (208) is fixedly connected to a cross section on one side of the cooling tube (207); and one end of the high temperature resistant cooling hose (402) near the fluid outlet main pipe (209) is slidably embedded in a pipe opening of a cross section on the other side of the cooling tube (207).

2. The hot-spot rapid cooling structure of the die-casting mold according to claim 1, characterized in that: An inner cooling liquid pipe (301) is installed inside the cooling pipe (207) by means of a connecting rod (303); a through hole (302) is provided through the side wall of the inner cooling liquid pipe (301); the axis of the inner cooling liquid pipe (301) coincides with the axis of the cooling pipe (207); an end of the inner cooling liquid pipe (301) close to the outlet fluid main pipe (209) is closed; an end of the inner cooling liquid pipe (301) close to the inlet fluid main pipe (208) passes through the inlet fluid main pipe (208) and is connected to a container containing cooling liquid; One end of the fluid inlet main pipe (208) away from the cooling pipe (207) is in communication with the outside air.

3. The hot node rapid cooling structure of the die casting mold according to claim 2, characterized in that: A cross-shaped water retaining piece is integrally formed inside the through hole (302).

4. The hot node rapid cooling structure of the die casting mold according to claim 2, characterized in that: The aperture of the through hole (302) close to the product thermal node area is larger than the aperture of the through hole (302) far from the product thermal node area.

5. The hot node rapid cooling structure of the die casting mold according to claim 2, characterized in that: The connecting rod (303) is cylindrical.

6. The hot node rapid cooling structure of the die casting mold according to claim 1, characterized in that: A sliding sleeve (403) is fixedly sleeved on the outer tube wall of one end of the high temperature resistant cooling hose (402) close to the outlet fluid main pipe (209), and the sliding sleeve (403) is slidably connected to the inner tube wall of the cooling pipe (207), and the sliding sleeve (403) is made of a hard material.

7. The hot-spot rapid cooling structure of the die-casting mold according to claim 6, characterized in that: A mounting ring (404) is fixedly installed on the inner wall of the cooling tube (207) near the sliding sleeve (403); a tension spring (405) is fixedly installed on one end of the mounting ring (404) near the sliding sleeve (403); and one end of the tension spring (405) near the sliding sleeve (403) is connected and fixed to the sliding sleeve (403); A plurality of metal springs (501) are fixedly mounted in a ring array on the inner wall of the high-temperature resistant cooling hose (402); in the absence of external force, the metal springs (501) are bent in a direction away from the mounting ring (404); all the metal springs (501) together limit the flow of the coolant inside the high-temperature resistant cooling hose (402); A support mechanism is provided on one side of the bent convex surface of the metal spring (501), the support mechanism comprising a slide rail (502) fixedly mounted on the inner wall of the high-temperature resistant cooling hose (402), a slider (503) being slidably mounted on the slide rail (502), limited blocks being fixed at both ends of the slide rail (502) to prevent the slider (503) from escaping from the track of the slide rail (502), one end of the slider (503) away from the inner wall of the high-temperature resistant cooling hose (402) being rotatably connected to a support rod (504) by means of a rotating shaft, a connecting protrusion (505) being fixed on the bent convex surface of the metal spring (501), and a free end of the support rod (504) being rotatably connected to one end of the connecting protrusion (505) away from the metal spring (501) by means of a rotating shaft.

8. The hot-spot rapid cooling structure of the die-casting mold according to claim 7, characterized in that: A rubber layer is fixedly attached to the outer side wall of the sliding sleeve (403).

9. The hot node rapid cooling structure of the die casting mold according to claim 1, characterized in that: The high temperature resistant cooling hose (402) is a high temperature resistant silicone hose.

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