Rapid cooling forming process of plastic die steel

Abstract

The invention discloses a rapid cooling forming process of plastic die steel, and relates to the field of die manufacturing technology.The rapid cooling forming process comprises a double-shaft hydraulic lifting system, a cooling mechanism, a top platen and a machining module, and the cooling mechanism comprises a liquid cooling assembly and a gas cooling assembly which are used for cooling after die machining; and the gaseous cooling assembly comprises an air cooling bin fixedly installed on the upper side wall of an inner cavity of the cooling machine body, and a second cooling air hole plate is fixedly installed at an air outlet of the air cooling bin. And meanwhile, a film generated by the liquid cooling medium in the limited space characteristics can be dispersed by utilizing the impact of the air flow, so that the liquid cooling medium forms mist under the impact of the high-speed air flow and enters a deep position for cooling, and the global dead-corner-free cooling of the limited space characteristics such as deep holes and narrow slits is realized.

Description

Technical Field

[0001] The invention relates to the field of mold manufacturing technology, in particular to a rapid cooling molding process for plastic mold steel. Background Art

[0002] In the field of plastic mold manufacturing, we need to process molds of various structures for process manufacturing. The cooling process of mold steel after processing directly determines the accuracy and life of the product. For some relatively fine structures, such as deep holes or narrow slits, forced cooling is often required after processing. This is to ensure dimensional accuracy and prevent stress cracks. Once cooling is not timely, corresponding problems will occur in the part.

[0003] We found that traditional cooling technologies (such as immersion oil cooling and high-pressure gas quenching) have significant defects when dealing with special structures such as deep holes and narrow slits: When using liquid media for cooling, the liquid medium cannot penetrate the bottom of the deep cavity due to the vapor film effect (Leidenfrost phenomenon), resulting in the formation of a localized thermal insulation layer. The temperature difference at the bottom of the deep cavity is significantly different from that outside, which can easily lead to insufficient strength in this part, causing preferential damage during use and greatly reducing the life of the mold. Although air cooling can cover the surface, the cooling intensity of deep holes / narrow slits is insufficient, and the temperature difference often exceeds 200°C. These problems cause local tempering and softening of the material (hardness drops by HRC 5-8) and residual stress concentration (>800MPa), ultimately leading to mold dimensional drift (micron-level deviation), stress cracks, and a life reduction of 30%-50%. Summary of the Invention

[0004] The purpose of the present invention is to provide a rapid cooling molding process for plastic mold steel, utilizing cross cooling between liquid cooling and air cooling to achieve full-area, dead-angle-free cooling of confined space features such as deep holes and narrow gaps, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rapid cooling molding process for plastic mold steel, comprising a dual-axis hydraulic lifting system, a cooling mechanism, a top plate and a machining module, wherein the cooling mechanism comprises a liquid cooling component and a gas cooling component for cooling the mold after processing, the gas cooling component comprises an air-cooling bin fixedly mounted on the upper side wall of the inner cavity of the cooling body, a cooling air hole plate 2 is fixedly mounted at the air outlet of the air-cooling bin, a slide portion is fixedly mounted on the front and rear sides of the lower end surface of the air-cooling bin, a cooling air hole plate 1 is slidably mounted between the two slide portions, the cooling air hole plate 1 slides upward through the bottom of the cooling air hole plate 2, the pore size of the cooling air hole plate 1 is smaller than the pore size of the cooling air hole plate 2, and the cooling The aperture of the pores in the cooling air pore plate 1 gradually decreases from top to bottom, and the dual-axis hydraulic lifting system includes a lifting part, which extends upward and penetrates into the inner cavity of the cooling body, and an air pore control component is installed between the lifting part and the cooling air pore plate 1. The up and down lifting of the lifting part drives the cooling air pore plate 1 to slide, and controls the area of the cooling air pore plate 1 covering the cooling air pore plate 2 to control the air pores. A clamping component for fixing and positioning the mold is installed at the top of the lifting part, and a clamping component for secondary fixation during the mold processing process is provided in the top plate. According to the structural shape of the processing mold surface, the lifting height of the left and right lifting parts is controlled to allow the mold to form a corresponding inclination angle to align with the appropriate air outlet, so as to perform cross-cooling of gas and liquid.

[0006] Preferably, the liquid cooling component includes a liquid cooling tank fixedly installed at the bottom of the inner cavity of the cooling body, a cavity is separated between the liquid cooling tank and the inner cavity side wall of the cooling body, a reflux cooling pipe is installed around the outer end of the liquid cooling tank, and the water inlet and outlet of the reflux cooling pipe are interconnected with the inner cavity of the liquid cooling tank.

[0007] Preferably, the air hole control component includes a roller mounting portion fixedly mounted on the upper end surface of the liquid cooling bin, a guide roller is rotatably mounted in the roller mounting portion, and fixed column portions are symmetrically mounted on the bottom of the cooling air hole plate 1 with the center of the cooling air hole plate 1 as the front and back, and two of the fixed column portions are fixedly connected with steel wire ropes respectively, and a fixing ring is fixedly mounted on the lifting portion, and a connecting rope is fixedly connected between the fixing ring and the corresponding two steel wire ropes, and the connecting rope passes through the guide roller.

[0008] Preferably, the clamping assembly includes a supporting table and a clamping plate, and the front and rear sides of the supporting table are respectively provided with thickened parts, and each of the thickened parts is respectively provided with a threaded hole, and two threaded columns are rotatably connected to the clamping plate, and each of the threaded columns is threadedly connected to the corresponding threaded hole, and the lower end surface of the support table is fixedly installed with a connecting part 1, and the top of the lifting part is fixedly connected with a connecting part 2, and the sphere at the top of the connecting part 2 is connected to the connecting part 1.

[0009] Preferably, the clamping assembly includes a clamping slide cavity arranged on both sides of the upper end surface of the top table, each of the clamping slide cavities is slidably connected with a clamping plate 1, and slots are equidistantly distributed on the front and rear end surfaces of the clamping plate 1. Clamping plates 2 are respectively provided on the front and rear side walls of the clamping slide cavity, and two clamping blocks are symmetrically installed on the clamping plate 2 with the center line of the top table as the center of symmetry, and each of the clamping blocks can be embedded in the corresponding slot.

[0010] Preferably, the shape of the slot is set to be trapezoidal, the diameter at the inner cavity mouth is larger than the diameter at the bottom of the inner cavity, a through groove is set in the middle of the block part, the block part is inserted into the slot, and the two side end faces of the block part are squeezed in the inner cavity of the slot, generating an outward reverse extrusion force to fix it.

[0011] Preferably, locking holes are respectively provided on the front and rear end surfaces of the top plate, and a connecting column with a threaded hole is fixedly connected to the clamping plate 2. The connecting column passes through the corresponding locking hole and is rotatably connected to a locking bolt at the outlet of the locking hole. The locking bolt is threadedly connected to the connecting column.

[0012] Preferably, the structural shape of the processing mold includes processing confined space features, and the confined space features are structural features of deep holes, narrow gaps, special-shaped deep cavities and cross holes.

[0013] Preferably, the mold inclination angle is set to be tilted downward on the side of the mold with more restricted space features, and the more restricted space features there are, the larger the inclination angle.

[0014] Preferably, a cooling fan is fixedly mounted on the front end surface of the cooling body, and an air pipe is connected between the air outlet of the cooling fan and the air cooling bin.

[0015] In summary, the beneficial effects of the present invention are:

[0016] The present invention cross-cools the processed mold through liquid cooling and air cooling. The liquid cooling penetrates into the shallow layer of the mold for cooling, and the high-speed gradient airflow generated by the air cooling uses an air column to air-cool the liquid-cooled mold. At the same time, the impact of the airflow can also disperse the film generated by the liquid cooling medium in the confined space features, so that this part of the liquid cooling medium forms a mist under the impact of the high-speed airflow and enters the deep position for cooling, thereby realizing full-area, dead-angle-free cooling of confined space features such as deep holes and narrow slits, thereby comprehensively improving the cooling of the mold, effectively avoiding the phenomenon of uneven cooling of confined space feature areas, greatly improving the quality of the mold, and compared with traditional cooling methods, it can effectively avoid the hardness difference between the bottom of the hole and the bottom of the slit and other parts due to the difference in cooling, which reduces the quality of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the overall structure of the rapid cooling molding process for plastic mold steel of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a cooling body of the rapid cooling molding process for plastic mold steel of the present invention;

[0020] Figure 3 Schematic diagram showing the internal structure of the cooling body of the rapid cooling molding process for plastic mold steel of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of a cooling body in the rapid cooling and forming process for plastic mold steel according to the present invention;

[0022] Figure 5 This is a schematic structural diagram from a bottom perspective of a component support platen in the rapid cooling molding process of plastic mold steel according to the present invention;

[0023] Figure 6 It is a partial enlarged structural schematic diagram of the roller mounting portion in the rapid cooling molding process of the plastic mold steel of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the cooling air hole plate and the air cooling chamber in the rapid cooling molding process of the plastic mold steel of the present invention;

[0025] Figure 8Schematic diagram of a closed and semi-closed structure of a cooling air hole plate in the rapid cooling molding process of plastic mold steel of the present invention;

[0026] Figure 9 Schematic diagram of the expanded structure of the locking hole and the clamping plate 1 in the rapid cooling molding process of the plastic mold steel of the present invention;

[0027] Figure 10 It is a structural schematic diagram of the clamping block portion in the rapid cooling molding process of the plastic mold steel of the present invention;

[0028] Figure 11 Schematic diagram of the structure of the slots in the rapid cooling molding process of the plastic mold steel of the present invention;

[0029] Figure 12 Schematic diagram of the mold tilting structure in the rapid cooling molding process of the plastic mold steel of the present invention;

[0030] Figure 13 The figure is a schematic diagram of the position of the connecting ropes during the descending process of the lifting part in the rapid cooling molding process of the plastic mold steel of the present invention.

[0031] The symbols in the accompanying drawings are described as follows: dual-axis hydraulic lifting system 1; control panel 2; cooling mechanism 3; cooling fan 4; guide rail 5; work table 6; machining module 7; mold 8; chip liquid conveying pipe 9; top table 10; clamping plate 11; locking hole 12; clamping slide cavity 13; clamping plate 2 14; blocking part 15; slot hole 16; lifting part 21; supporting table 22; dividing clamping plate 23; threaded column 24; thickening part 25; connecting part 1 26; connecting part 27; cooling body 31; liquid cooling chamber 32; reflux cooling pipe 33; air cooling chamber 34; air pipe 35; slide part 36; cooling air hole plate 1 37; cooling air hole plate 2 38; fixed column part 39; wire rope 40; connecting rope 41; roller mounting part 42; guide roller 43; fixing ring 44. DETAILED DESCRIPTION

[0032] The present invention will now be further described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic way, and therefore only show the structures related to the present invention.

[0033] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0035] Any feature disclosed in this specification (including any appended claims, abstract, and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0036] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to mechanical connection, direct connection, or indirect connection through an intermediate medium; they can refer to internal communication between at least two elements or interaction between at least two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] The following combination Figures 1-13 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The front, back, left, right, up and down directions of the view are consistent.

[0038] Among them, plastic mold steel is a type of steel specially used for manufacturing plastic molds. The manufacturing of molds requires processing into the required shape and specifications. After processing some relatively fine structures, such as deep holes or narrow slits, forced cooling is often required. This is to ensure dimensional accuracy and prevent stress cracks. Once cooling is not timely, corresponding problems will occur in this part.

[0039] See also Figures 1-13The present invention provides an embodiment of a rapid cooling molding process for plastic mold steel, which can quickly and comprehensively cool the mold after processing, specifically including a dual-axis hydraulic lifting system 1, a cooling mechanism 3, a guide rail 5, a top plate 10 and a machining module 7, wherein the upper end surface of the guide rail 5 is installed with a workbench 6, the cooling mechanism 3 is fixedly installed on the upper end surface of the dual-axis hydraulic lifting system 1, and the upper end surface of the cooling mechanism 3 passes through the workbench 6, and the cooling mechanism 3 includes a liquid cooling component and a gaseous cooling component for cooling the mold after processing. The cooling medium of the corresponding state can be selected according to the characteristics of the processing mold material. The liquid cooling component includes a cooling medium fixedly installed at the bottom of the inner cavity of the cooling body 31 The liquid cooling tank 32 has a cavity between it and the inner cavity side wall of the cooling body 31. The inner cavity of the cooling body 31 is used to store liquid cooling medium. A reflux cooling pipe 33 is installed around the outer end of the liquid cooling tank 32. The water inlet at the bottom and the water storage port at the top of the reflux cooling pipe 33 are respectively connected to the inner cavity of the liquid cooling tank 32, so that the liquid cooling medium flows from the bottom of the inner cavity of the liquid cooling tank 32 into the reflux cooling pipe 33, circulates along the reflux cooling pipe 33, and flows back to the inner cavity of the liquid cooling tank 32 from the top. The circulating liquid cooling medium can dissipate heat through the reflux cooling pipe 33 to maintain the temperature of the liquid cooling medium.

[0040] refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 8 , and the gaseous cooling component includes an air cooling bin 34 fixedly mounted on the upper side wall of the inner cavity of the cooling body 31, one on each of the left and right sides, the air outlet of the air cooling bin 34 is beveled, aligned with the center position of the liquid cooling bin 32, a cooling fan 4 is fixedly mounted on the front face of the cooling body 31, an air pipe is connected between the air outlet of the cooling fan 4 and the air cooling bin 34, and a cooling air hole plate 2 38 is fixedly mounted at the air outlet of the air cooling bin 34, a slide portion 36 is fixedly mounted on the lower end face of the air cooling bin 34 on the front and rear sides, a cooling air hole plate 1 37 is slidably mounted between the two slide portions 36, The cooling air hole plate 1 37 slides upward through the bottom of the cooling air hole plate 2 38, and the cooling air hole plate 1 37 can slide upward to cover the cooling air hole plate 2 38. The air hole diameters in the cooling air hole plate 1 37 are all smaller than the air hole diameters in the cooling air hole plate 2 38, and the air hole diameters in the cooling air hole plate 1 37 gradually decrease from top to bottom. Therefore, when the cooling air hole plate 1 37 covers the cooling air hole plate 2 38, the air flow column formed by the air ejected from the air cooling chamber 34 through the air holes in the cooling air hole plate 1 37 also gradually decreases from top to bottom, but the flow velocity intensity of the air flow column at the bottom is greater;

[0041] The dual-axis hydraulic lifting system 1 at the bottom includes a lifting part 21 and a control panel 2. The lifting part 21 is controlled to move up and down by adjusting the control panel 2. The lifting part 21 extends upward and penetrates into the inner cavity of the cooling body 31. An air hole control component is installed between the lifting part 21 and the cooling air hole plate 1 37. The lifting part 21 moves up and down to drive the cooling air hole plate 1 37 to slide, and controls the area of the cooling air hole plate 1 37 covering the cooling air hole plate 2 38 to control the air holes. A clamping component for fixing and positioning the mold is installed at the top of the lifting part 21, and a clamping component for secondary fixation during mold processing is provided in the top plate 10. When preparing to process the mold, the mold is installed on the clamping assembly for positioning and fixing, and then the clamping assembly is used to fix the mold for a second time. Finally, the machining module 7 is driven to process the mold. Before processing, we can know the structure of the mold according to the processing drawings of the mold. After the mold is processed, which side has more restricted space features? The lifting part 21 on the corresponding side of the mold is controlled to descend a greater distance than the lifting part 21 on the other side, so that the processed mold is tilted on the two lifting parts 21. The restricted space features refer to structural features such as deep holes, narrow slits, microchannels, special-shaped deep cavities and cross holes. These structural features are more difficult to cool, so they are also the places where problems are most likely to occur. For example, Figure 12As shown, if the mold has more deep hole structures on side a, the lifting part 21 on side a is controlled to descend a greater distance, and the lifting part 21 on the other side is controlled to descend a smaller distance, so that the mold is tilted downward toward side a to form an inclination angle. The larger the inclination angle, the more confined space features there are. When the lifting part 21 descends a greater distance, the air hole control component on the corresponding side controls the cooling air hole plate 1 37 on the corresponding side to slide upward, thereby covering the cooling air hole plate 2 38. The greater the descending distance, the larger the covered area. The coverage is gradually carried out from the bottom upward, so the air holes at the bottom must be smaller than the air holes at the top. The smaller the air holes, the smaller the diameter of the air flow column formed, and the greater the flow rate. The smaller the air flow column, the more comprehensive the coverage of confined space features such as deep holes, so that it can be cooled more fully. At the same time, after the mold tilting is completed, the two lifting parts 21 are controlled to descend simultaneously and sink into the liquid cooling medium. The mold rises to the surface and uses the airflow to cool the confined space. At the same time, the impact of the airflow can also disperse the film produced by the liquid cooling medium, so that this part of the liquid cooling medium forms a mist under the impact of the high-speed airflow and enters the deep position for cooling, thereby comprehensively improving the cooling of the mold, effectively avoiding the phenomenon of uneven cooling of the confined space feature area, and greatly improving the quality of the mold.

[0042] It is worth mentioning that in this embodiment, the air hole control component includes a roller mounting portion 42 fixedly mounted on the upper end surface of the liquid cooling tank 32, a guide roller 43 is rotatably mounted in the roller mounting portion 42, and the bottom of the cooling air hole plate 37 is symmetrically distributed with the center of the cooling air hole plate 37. The two fixed columns 39 are respectively fixedly connected to the wire rope 40, and a fixing ring 44 is fixedly mounted on the lifting portion 21. A connecting rope is fixedly connected between the fixing ring 44 and the corresponding two wire ropes 40. Rope 41, the connecting rope 41 passes through the guide roller 43. At the beginning, the mold has just been processed and is ready to be lowered into the inner cavity of the cooling body 31. At this time, the cooling air hole plate 1 37 is at the bottom and the cooling air hole plate 2 38 is completely exposed. In the process of the lifting part 21 descending from a high position, and in the process of the lifting part 21 assembly descending, the connecting rope 41 is not under force for a distance, at least when the fixing ring 44 descends to the level of the upper end surface of the liquid cooling tank 32, until the fixing ring 44 descends into the inner cavity of the liquid cooling tank 32, refer to Figure 13 Within this distance H, the connecting rope 41 will not be subjected to the tension of the fixing ring 44. Therefore, when the mold is just processed and descends into the inner cavity of the liquid cooling bin 32, it will preferentially receive a cooling airflow on both sides. When the fixing ring 44 descends into the inner cavity of the liquid cooling bin 32, the mold is located at the upper end surface of the liquid cooling bin 32, and the inclination angle of the mold is adjusted according to the characteristics of the confined space. After the adjustment is completed, the lifting part 21 is controlled to drive the mold up and down for cross cooling of gas and liquid.

[0043] It is also worth mentioning that the reference Figure 5 The two screw rods 24 are connected to the corresponding screw holes, and the two screw rods 24 are connected to the corresponding screw holes.

[0044] It should be noted that the reference Figure 9 、 Figure 10 and Figure 11In this embodiment, the clamping assembly includes a clamping slide cavity 13 arranged on both sides of the upper end surface of the top table 10, and each of the clamping slide cavities 13 is slidably connected to a clamping plate 11, and slots 16 are equidistantly provided on the front and rear end surfaces of the clamping plate 11. A clamping plate 2 14 is provided on the front and rear side walls of the clamping slide cavity 13, and two clamping blocks 15 are symmetrically installed on the clamping plate 2 14 with the center line of the top table 10 as the center of symmetry. Each of the clamping blocks 15 can be embedded in the corresponding slot 16. Locking holes 12 are respectively provided on the front and rear end surfaces of the top table 10, and an adjustment hole is provided next to the locking hole 12. A connecting column with a threaded hole is fixedly connected to the clamping plate 2 14 The connecting column passes through the corresponding locking hole 12, and a locking bolt is rotatably connected at the outlet of the locking hole 12. The locking bolt is threadedly connected to the connecting column, so that when the mold is installed on the clamping assembly, the two clamping plates 11 are slid against the mold, and a hexagonal wrench is inserted into the locking hole 12 for rotation and locking, so that the clamping plate 2 14 slides in the direction close to the mold, so that the block part 15 is embedded in the corresponding slot hole 16 to form a secondary fixation. After the processing is completed, it is only necessary to rotate the locking bolt in the opposite direction to loosen the clamping plate 2 14 so that the block part 15 is separated from the slot hole 16. At this time, without the secondary clamping, the lifting part 21 can drive the mold to descend for cooling.

[0045] It should also be noted that in order to make the secondary fixation more stable, in this embodiment, the shape of the slot 16 is set to be trapezoidal, the diameter at the inner cavity mouth is larger than the diameter at the bottom of the inner cavity, and a through groove is provided in the middle of the block part 15. The block part 15 is inserted into the slot 16, and the two side end faces of the block part 15 are squeezed in the inner cavity of the slot 16, generating an outward reverse extrusion force for fixation.

[0046] Specific runtime:

[0047] Liquid cooling medium used: nano-modified water-based liquid;

[0048] Features of the restricted space on the mold side a:

[0049] Deep hole A: diameter 1.5mm×30mm (depth-to-diameter ratio 20:1);

[0050] Slit B: 0.8mm×12mm×50mm (depth-to-width ratio 15:1);

[0051] Cross hole C: 2mm diameter, orthogonal intersection;

[0052] First, install the mold on the clamping assembly, turn the threaded column 24 to clamp the clamping plate 23 to the side wall of the mold, insert the hexagonal wrench into the locking hole 12, tighten the bolt to move the clamping plate 14 to allow the trapezoidal block part 15 to wedge into the slot 16 to generate a radial locking force. After the installation is completed, the machining module 7 performs deep hole / narrow gap processing, and at the same time, the chip liquid delivery pipe 9 on the side sprays the chip liquid. Deep hole A: use a ⌀1.45mm carbide drill bit (internal cooling pressure 15MPa), narrow gap B: 0.8mm milling cutter, MQL minimal lubrication, after the processing is completed, loosen the locking bolt to allow the block part 15 to exit the slot 16. At this time, due to the many restricted space features on the a side, the dual-axis hydraulic system performs differentiated The mold descends, and the inclination angle of the mold is set to 20°. At the beginning, the mold descends normally. When descending into the inner cavity of the liquid cooling bin 32, it will receive a cooling airflow on both sides first. The cooling airflow generated by the cooling fan 4 enters the air cooling bin 34 on both sides. When the fixing ring 44 descends into the inner cavity of the liquid cooling bin 32, the mold is located at the upper end surface of the liquid cooling bin 32. The inclination angle of the mold is adjusted according to the characteristics of the confined space. The lifting part 21 on the a side is lowered by 80mm. The inclination angle is maintained and the two lifting parts 21 are controlled to descend together and sink into the liquid cooling medium for liquid cooling. Then they rise to the liquid surface together. Since the inclination angle is maintained, the lifting parts 21 on both sides are lowered. The connecting rope 41 will pull the corresponding cooling air hole plate 1 37 up a corresponding distance. The cooling air hole plate 1 37 on the a side moves up to cover 60% of the area of the cooling air hole plate 2 38, while the coverage rate on the other side is only 15%, which causes the air holes to change. The diameter of the air hole at the bottom of the a side is 0.3mm, the air flow speed is 120m / s, the diameter of the air hole at the top is 0.8mm, and the air flow speed is 40m / s. Since most of the deep holes and narrow slits are on the a side of the mold, the a side is tilted at this time, and the deep holes and narrow slits basically correspond to the air holes at the bottom of the a side, and the other side corresponds to the top of the a side. The cooling air flow is accelerated through the air cooling chamber 34 to pass through the cooling air hole plate 1 37 to form a high-speed gradient air flow, and the air column is used to cool the liquid after cooling. The mold is air-cooled, and the impact of the airflow can also be used to disperse the film produced by the liquid cooling medium, so that this part of the liquid cooling medium forms a mist under the impact of the high-speed airflow and enters the deep position for cooling, thereby comprehensively improving the cooling of the mold, effectively avoiding the phenomenon of uneven cooling in the characteristic area of the confined space, and greatly improving the quality of the mold. At this time, the mold is again settled in the liquid cooling medium for cooling. Finally, the mold is removed after the cooling is completed. The alternating cooling of air cooling and liquid cooling can effectively avoid the hardness difference between the bottom of the hole and the bottom of the seam and other parts due to the difference in cooling, which reduces the mold quality.

[0053] In summary, the present invention tilts the mold at a corresponding angle through the confined space features processed in the mold, and uses cross-cooling of liquid cooling and air cooling. The liquid cooling penetrates into the shallow layer and pneumatically breaks the surface film to form atomized droplets that penetrate deep into the confined space, thereby achieving full-area cooling without dead angles for confined space features such as deep holes / narrow gaps, effectively avoiding mold scrapping due to local failure, and greatly improving the life of the mold.

[0054] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Any changes or substitutions that are not conceived through creative effort should be included within the scope of protection of the invention. Therefore, the scope of protection of the invention should be based on the scope of protection defined in the claims.

Claims

1. A rapid cooling molding process for plastic mold steel, comprising a biaxial hydraulic lifting system (1), a cooling mechanism (3), a top plate (10) and a machining module (7), characterized in that: The cooling mechanism (3) includes a liquid cooling component and a gas cooling component for cooling the mold after processing, the gas cooling component includes an air cooling chamber (34) fixedly mounted on the upper side wall of the inner cavity of the cooling body (31), a cooling air hole plate 2 (38) is fixedly mounted at the air outlet of the air cooling chamber (34), a slide portion (36) is fixedly mounted on the front and rear sides of the lower end surface of the air cooling chamber (34), a cooling air hole plate 1 (37) is slidably mounted between the two slide portions (36), the cooling air hole plate 1 (37) slides upward through the bottom of the cooling air hole plate 2 (38), the pore size of the cooling air hole plate 1 (37) is smaller than the pore size of the cooling air hole plate 2 (38), and the cooling The aperture of the pores in the pore plate 1 (37) gradually decreases from top to bottom. The dual-axis hydraulic lifting system (1) includes a lifting part (21), and the lifting part (21) extends upward and penetrates into the inner cavity of the cooling body (31). An pore control component is installed between the lifting part (21) and the cooling pore plate 1 (37). The lifting and lowering of the lifting part (21) drives the cooling pore plate 1 (37) to slide, and controls the area of the cooling pore plate 1 (37) covering the cooling pore plate 2 (38) to control the pores. According to the structural shape of the processing mold, the lifting heights of the left and right lifting parts (21) are controlled to allow the mold to form a corresponding tilt angle to align with the appropriate pores, so as to perform cross cooling of gas and liquid.

2. The rapid cooling molding process for plastic mold steel according to claim 1, characterized in that: The liquid cooling component includes a liquid cooling tank (32) fixedly installed at the bottom of the inner cavity of the cooling body (31), a cavity is separated between the liquid cooling tank (32) and the inner cavity side wall of the cooling body (31), a reflux cooling pipe (33) is installed around the outer end of the liquid cooling tank (32), and the water inlet and water outlet of the reflux cooling pipe (33) are interconnected with the inner cavity of the liquid cooling tank (32).

3. The rapid cooling molding process for plastic mold steel according to claim 2, characterized in that: The air hole control component includes a roller mounting portion (42) fixedly mounted on the upper end surface of the liquid cooling chamber (32), a guide roller (43) is rotatably mounted in the roller mounting portion (42), a fixed column portion (39) is symmetrically mounted on the bottom of the cooling air hole plate (37) with the center of the cooling air hole plate (37) as the front and back, and the two fixed columns (39) are respectively fixedly connected with steel wire ropes (40), a fixed ring (44) is fixedly mounted on the lifting portion (21), a connecting rope (41) is fixedly connected between the fixing ring (44) and the corresponding two steel wire ropes (40), and the connecting rope (41) passes through the guide roller (43).

4. The rapid cooling molding process for plastic mold steel according to claim 3, characterized in that: The top of the lifting part (21) is equipped with a clamping assembly for fixing and positioning the mold, and the clamping assembly includes a support plate (22) and a clamping plate (23). The front and rear sides of the support plate (22) are respectively provided with thickened parts (25), and each of the thickened parts (25) is respectively provided with a threaded hole. Two threaded columns (24) are rotatably connected to the clamping plate (23), and each of the threaded columns (24) is respectively threadedly connected to the corresponding threaded hole. The lower end surface of the support plate (22) is fixedly equipped with a connecting part 1 (26), and the top of the lifting part (21) is fixedly connected with a connecting part 2 (27), and the sphere at the top of the connecting part 2 (27) is connected to the connecting part 1 (26).

5. The rapid cooling molding process for plastic mold steel according to claim 4, characterized in that: The top plate (10) is provided with a clamping assembly for secondary fixation during mold processing, and the clamping assembly includes a clamping slide cavity (13) provided on both sides of the upper end surface of the top plate (10), and each clamping slide cavity (13) is slidably connected with a clamping plate (11), and slot holes (16) are equidistantly distributed on the front and rear end surfaces of the clamping plate (11), and a clamping plate (14) is provided on the front and rear side walls of the clamping slide cavity (13), respectively. Two block parts (15) are symmetrically installed on the clamping plate (14) with the center line of the top plate (10) as the center of symmetry, and each block part (15) can be embedded in the corresponding slot hole (16).

6. The rapid cooling molding process for plastic mold steel according to claim 5, characterized in that: The shape of the slot (16) is set to be a trapezoid, the diameter at the inner cavity mouth is larger than the diameter at the bottom of the inner cavity, a through slot is set in the middle of the block part (15), the block part (15) is inserted into the slot (16), and the end faces of both sides of the block part (15) are squeezed in the inner cavity of the slot (16), generating an outward reverse squeezing force to fix it.

7. The rapid cooling molding process for plastic mold steel according to claim 6, characterized in that: Locking holes (12) are respectively provided on the front and rear end surfaces of the top plate (10), and a connecting column with a threaded hole is fixedly connected to the clamping plate 2 (14). The connecting column passes through the corresponding locking hole (12), and a locking bolt is rotatably connected at the outlet of the locking hole (12). The locking bolt is threadedly connected to the connecting column.

8. The rapid cooling molding process for plastic mold steel according to claim 7, characterized in that: The structural shape of the processing mold includes the confined space characteristics of the processing, and the confined space characteristics are structural characteristics of deep holes, narrow gaps, special-shaped deep cavities and cross holes.

9. The rapid cooling molding process for plastic mold steel according to claim 8, characterized in that: The mold tilt angle is set so that the side with more confined space features in the mold tilts downward, and the number of confined space features is positively correlated with the tilt angle.

10. The rapid cooling molding process for plastic mold steel according to claim 9, characterized in that: A cooling fan (4) is fixedly mounted on the front end surface of the cooling body (31), and an air pipe is connected between the air outlet of the cooling fan (4) and the air cooling bin (34).

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