Rapid cooling molding equipment for plastic mold steel

Abstract

This invention discloses a rapid cooling molding equipment for plastic mold steel, relating to the field of mold manufacturing technology. It includes a dual-axis hydraulic lifting system, a cooling mechanism, a top plate, and a machining module. The cooling mechanism includes a liquid cooling component and a gas cooling component for cooling the mold after processing. The gas cooling component includes an air-cooled chamber fixedly installed on the upper side wall of the inner cavity of the cooling machine body. A second cooling air vent plate is fixedly installed at the air outlet of the air-cooled chamber. This invention uses liquid cooling and gas cooling to cross-cool the processed mold. The liquid cooling penetrates into the shallow layer of the mold for cooling, while the impact of the airflow disperses the film generated by the liquid cooling medium in confined spaces. This causes the liquid cooling medium to form a mist under the impact of the high-speed airflow and enter deeper layers for cooling, achieving full-area, dead-angle-free cooling of confined spaces such as deep holes and narrow slits.

Description

Technical Field

[0001] This invention relates to the field of mold manufacturing technology, specifically to rapid cooling molding equipment for plastic mold steel. Background Technology

[0002] In the field of plastic mold manufacturing, we need to process molds with various structures for manufacturing. The cooling process after processing mold steel directly determines the product's precision and lifespan. For some more delicate 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. If cooling is not timely, it will lead to corresponding problems in that part.

[0003] We have found that traditional cooling technologies (such as immersion oil cooling and high-pressure gas quenching) have significant drawbacks when dealing with special structures such as deep holes and narrow slits. When using liquid media for cooling, the liquid media cannot penetrate to the bottom of the deep cavity due to the vapor film effect (Leidenfrost phenomenon), resulting in the formation of a local heat insulation layer. The temperature difference at the bottom of the deep cavity is large compared to the outside, which easily leads to insufficient strength in this part, thus causing preferential damage during use and greatly reducing the mold life. Although gas cooling can cover the surface, the cooling intensity for 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 decreases by HRC 5-8), residual stress concentration (>800MPa), and ultimately lead to mold dimensional drift (micron-level deviation), stress cracks, and a 30%-50% reduction in lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid cooling molding device for plastic mold steel, which utilizes cross-cooling between liquid cooling and air cooling to achieve full-area, dead-angle-free cooling of confined spaces such as deep holes and narrow slits, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid cooling molding equipment for plastic mold steel, comprising a dual-axis hydraulic lifting system, a cooling mechanism, a top plate, and a machining module. The cooling mechanism includes a liquid cooling component and a gas cooling component for cooling the mold after machining. The gas cooling component includes an air-cooled chamber fixedly installed on the upper side wall of the inner cavity of the cooling body. A second cooling air vent plate is fixedly installed at the air outlet of the air-cooled chamber. Slide sections are fixedly installed on the front and rear sides of the lower end face of the air-cooled chamber. A first cooling air vent plate is slidably installed between the two slide sections. The first cooling air vent plate slides upward through the bottom of the second cooling air vent plate. The diameter of the air holes in the first cooling air vent plate is smaller than the diameter of the air holes in the second cooling air vent plate. The diameter of the air holes in the first cooling air hole plate gradually decreases from top to bottom. The dual-axis hydraulic lifting system includes a lifting part that extends upward and penetrates into the inner cavity of the cooling machine body. An air hole control component is installed between the lifting part and the first cooling air hole plate. The up-and-down movement of the lifting part drives the first cooling air hole plate to slide, controlling the area of ​​the first cooling air hole plate covering the second cooling air hole plate to control the air holes. A clamping component for fixing and positioning the mold is installed at the top of the lifting part. A clamping component for secondary fixing during mold processing is provided in the top plate. According to the structural shape of the mold surface, the lifting height of the left and right lifting parts is controlled to make the mold form a corresponding tilt angle to align with the matching air holes, so as to achieve cross cooling of gaseous and liquid states.

[0006] Preferably, the liquid cooling assembly includes a liquid cooling chamber fixedly installed at the bottom of the inner cavity of the cooling machine body. A cavity is spaced between the liquid cooling chamber and the inner cavity sidewall of the cooling machine body. A return cooling pipe is installed around the outer end of the liquid cooling chamber. The inlet and outlet of the return cooling pipe are both connected to the inner cavity of the liquid cooling chamber.

[0007] Preferably, the vent control assembly includes a roller mounting part fixedly installed on the upper surface of the liquid cooling chamber, a guide roller rotatably installed in the roller mounting part, and fixed columns symmetrically distributed around the center of the cooling vent plate one at the bottom. Two fixed columns are respectively fixedly connected to steel wire ropes. A fixed ring is fixedly installed on the lifting part, and a connecting rope is fixedly connected between the fixed ring and the corresponding two steel wire ropes. The connecting rope passes through the guide roller.

[0008] Preferably, the clamping assembly includes a support plate and a clamping plate. The support plate has thickened portions on its front and rear sides, and each thickened portion has a threaded hole. Two threaded posts are rotatably connected to the clamping plate, and each threaded post is threaded into the corresponding threaded hole. A connecting part one is fixedly installed on the lower end face of the support plate, and a connecting part two is fixedly connected to the top of the lifting part. The ball at the top of the connecting part two is connected to the connecting part one.

[0009] Preferably, the clamping assembly includes clamping cavities disposed on both sides of the upper end face of the top plate. Each clamping cavity is slidably connected to a clamping plate one. Slots are equidistantly distributed on the front and rear end faces of the clamping plate one. Clamping plates two are disposed on the front and rear side walls of the clamping cavity respectively. Two locking parts are symmetrically installed on the clamping plate two with the center line of the top plate as the center of symmetry. Each locking part can be embedded in the corresponding slot.

[0010] Preferably, the slot is trapezoidal in shape, with the diameter at the inner opening being larger than the diameter at the bottom of the inner cavity. A through slot is provided in the middle of the locking block. The locking block is inserted into the slot, and the two end faces of the locking block are pressed into the inner cavity of the slot, generating a reverse compressive force to fix it.

[0011] Preferably, locking holes are provided on the front and rear end faces of the top plate, and a connecting column with a threaded hole is fixedly connected to the clamping plate. The connecting column passes through the corresponding locking hole, and a locking bolt is rotatably connected to 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 the characteristics of the restricted space for processing, and the restricted space characteristics are structural features of deep holes, narrow slits, irregular deep cavities and cross holes.

[0013] Preferably, the mold tilt angle is set to tilt downwards on the side of the mold with more confined space features, and the more confined space features there are, the larger the tilt angle should be.

[0014] Preferably, a cooling fan is fixedly installed on the front end face of the cooling unit, and an air pipe is connected between the air outlet of the cooling fan and the air-cooled chamber.

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

[0016] This invention employs a combination of liquid and air cooling to cross-cool the processed mold. Liquid cooling penetrates the shallow layers of the mold, while the high-speed gradient airflow generated by air cooling further cools the liquid-cooled mold. Simultaneously, the impact of the airflow disperses the film formed by the liquid cooling medium in confined spaces, causing this liquid cooling medium to form a mist that penetrates deeper into the mold for further cooling. This achieves comprehensive, dead-angle-free cooling of confined spaces such as deep holes and narrow slits, thus significantly improving the overall cooling of the mold. It effectively avoids uneven cooling in confined space areas, greatly enhancing mold quality. Compared to traditional cooling methods, this invention effectively prevents differences in hardness at the bottom of holes and slits due to temperature variations, which can lead to reduced mold quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the rapid cooling molding equipment for plastic mold steel according to the present invention;

[0019] Figure 2 This is a schematic diagram of the cooling body of the rapid cooling molding equipment for plastic mold steel of the present invention.

[0020] Figure 3 This is a schematic diagram showing the internal structure of the cooling unit of the rapid cooling molding equipment for plastic mold steel of the present invention.

[0021] Figure 4 This is a top view of the internal structure of the cooling unit of the rapid cooling molding equipment for plastic mold steel of the present invention.

[0022] Figure 5 This is a schematic diagram of the bottom view of the component support platform in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0023] Figure 6 This is a partially enlarged structural diagram of the roller mounting section in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0024] Figure 7 This is a schematic diagram of the cooling air vent plate and the air cooling chamber in the rapid cooling molding equipment for plastic mold steel of the present invention.

[0025] Figure 8This is a schematic diagram of a closed and semi-closed structure of a cooling air vent plate in a rapid cooling molding equipment for plastic mold steel according to the present invention.

[0026] Figure 9 This is a schematic diagram of the unfolded structure of the locking hole and clamping plate 1 in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0027] Figure 10 This is a schematic diagram of the clamping block in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0028] Figure 11 This is a schematic diagram of the slot structure in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0029] Figure 12 This is a schematic diagram of the inclined mold structure in the rapid cooling molding equipment for plastic mold steel of the present invention;

[0030] Figure 13 This is a schematic diagram showing the position of the connecting rope during the descent of the lifting part in the rapid cooling molding equipment for plastic mold steel of the present invention.

[0031] The markings in the attached diagram are described as follows: 1. Dual-axis hydraulic lifting system; 2. Control panel; 3. Cooling mechanism; 4. Cooling fan; 5. Guide rail; 6. Worktable; 7. Machining module; 8. Mold; 9. Chip fluid delivery pipe; 10. Top plate; 11. Clamping plate one; 12. Locking hole; 13. Clamping slide cavity; 14. Clamping plate two; 15. Locking block; 16. Slot; 21. Lifting part; 22. Support plate; 23. Clamping plate; 24. Threaded column; 25. Thickened part; 26. Connecting part one; 27. Connecting part two; 31. Cooling body; 32. Liquid cooling chamber; 33. Return cooling pipe; 34. Air cooling chamber; 35. Air pipe; 36. Slide section; 37. Cooling air vent plate one; 38. Cooling air vent plate two; 39. Fixed column; 40. Steel wire rope; 41. Connecting rope; 42. Roller mounting part; 43. Guide roller; 44. Fixing ring. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0034] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0035] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of at least two elements or the interaction relationship of at least two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

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

[0038] Plastic mold steel is a type of steel specifically used for manufacturing plastic molds. Mold manufacturing requires processing to achieve the required shape and specifications. For some delicate 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. If cooling is not timely, it will lead to corresponding problems in that part.

[0039] Please see Figures 1-13This invention provides an embodiment of a rapid cooling molding device for plastic mold steel, capable of rapidly cooling the processed mold from all directions. Specifically, it includes a dual-axis hydraulic lifting system 1, a cooling mechanism 3, guide rails 5, a top plate 10, and a machining module 7. A worktable 6 is mounted on the upper surface of the guide rails 5. The cooling mechanism 3 is fixedly installed on the upper surface of the dual-axis hydraulic lifting system 1, with its upper surface passing through the worktable 6. The cooling mechanism 3 includes a liquid cooling component and a gaseous cooling component for cooling the mold after processing. The appropriate cooling medium can be selected based on the characteristics of the mold material. The liquid cooling component is fixedly installed at the bottom of the inner cavity of the cooling unit 31. The liquid cooling chamber 32 is provided, and a cavity is provided between the liquid cooling chamber 32 and the inner cavity sidewall of the cooling body 31. The inner cavity of the cooling body 31 is used to hold liquid cooling medium, and a return cooling pipe 33 is installed around the outer end of the liquid cooling chamber 32. The bottom water inlet and the top water storage inlet of the return cooling pipe 33 are respectively connected to the inner cavity of the liquid cooling chamber 32, so that the liquid cooling medium flows from the bottom of the inner cavity of the liquid cooling chamber 32 into the return cooling pipe 33 and circulates along the return cooling pipe 33, flowing back into the inner cavity of the liquid cooling chamber 32 from the top. The circulating liquid cooling medium can dissipate heat through the return cooling pipe 33 to maintain the temperature of the liquid cooling medium.

[0040] refer to Figure 3 , Figure 6 , Figure 7 and Figure 8 The gaseous cooling assembly includes an air-cooled chamber 34 fixedly installed on the upper side wall of the inner cavity of the cooling body 31, with one chamber on each of the left and right sides. The air outlet of the air-cooled chamber 34 is obliquely cut and aligned with the center of the liquid-cooled chamber 32. A cooling fan 4 is fixedly installed on the front end face of the cooling body 31. An air pipe connects the air outlet of the cooling fan 4 to the air-cooled chamber 34. A second cooling air vent plate 38 is fixedly installed at the air outlet of the air-cooled chamber 34. Slide rails 36 are fixedly installed on the lower end face of the air-cooled chamber 34 on both the front and rear sides. A first cooling air vent plate 37 is slidably installed between the two slide rails 36. The first cooling air vent plate 37 slides upward through the bottom of the second cooling air vent plate 38, and the first cooling air vent plate 37 can slide upward to cover the second cooling air vent plate 38. The diameter of the air vents in the first cooling air vent plate 37 is smaller than that in the second cooling air vent plate 38, and the diameter of the air vents in the first cooling air vent plate 37 gradually decreases from top to bottom. This means that when the first cooling air vent plate 37 covers the second cooling air vent plate 38, the airflow column formed by the gas ejected from the air-cooled chamber 34 through the air vents in the first cooling air vent plate 37 also gradually decreases from top to bottom, but the airflow column at the bottom has a greater flow velocity and intensity.

[0041] The dual-axis hydraulic lifting system 1 located 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 vent control assembly is installed between the lifting part 21 and the first cooling vent plate 37. The up and down movement of the lifting part 21 drives the first cooling vent plate 37 to slide, controlling the area covered by the first cooling vent plate 37 on the second cooling vent plate 38 to control the air vents. A clamping assembly for fixing and positioning the mold is installed at the top of the lifting part 21. A clamping assembly for secondary fixing during mold processing is provided in the top plate 10. When preparing to process the mold, the mold is first mounted on the clamping assembly for positioning and fixation. Then, the clamping assembly is used for secondary fixation. Finally, the machining module 7 is driven to process the mold. Before processing, the mold structure can be determined from the machining drawings. After processing, the side with more confined space features is controlled so that the lowering distance of the corresponding lifting part 21 is greater than that of the other side. This results in the finished mold being tilted on the two lifting parts 21. Confined space features refer to structures such as deep holes, narrow slits, microchannels, irregular deep cavities, and intersecting holes. These structural features are difficult to cool and are therefore the most prone to problems. Figure 12As shown, if the mold has more deep holes on side a, the lowering distance of the lifting part 21 on side a is controlled to be larger, while the lowering distance of the lifting part 21 on the other side is smaller, so that the mold is tilted downwards towards side a, forming an inclination angle. The larger the inclination angle, the more confined space features there are. When the lowering distance of the lifting part 21 is larger, the cooling air vent plate 37 on the corresponding side is controlled to slide upwards through the air vent control component on the corresponding side, thereby covering the cooling air vent plate 38. The larger the lowering distance, the larger the coverage area. Covering gradually from the bottom to the top, the air vents at the bottom are definitely smaller than those at the top. The smaller the air vents, the smaller the diameter of the air column formed, and the greater the flow velocity. The smaller the air column, the more comprehensive the coverage of confined space features such as deep holes, thus more fully cooling them. At the same time, after the mold is tilted, both lifting parts 21 are controlled to descend simultaneously and sink into the liquid cooling medium. In the middle, it rises to the air and is cooled by airflow, achieving cross-cooling of gaseous and liquid states. When it sinks into the liquid cooling medium, the liquid cooling medium will penetrate into the confined space features. Due to the characteristics of the confined space features, the liquid will form a film at that location, hindering the entry of the liquid cooling medium. For example, in the deep hole position, the liquid cooling medium is very likely to form a vapor film or viscous boundary layer that hinders the entry of the liquid, thus causing the deep part of the confined space features to be unable to be cooled by the liquid medium. At this time, the mold rises to the surface and uses airflow to cool the confined space feature area with gaseous cooling. At the same time, the impact of the airflow can also break up the film formed 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. This comprehensively improves the cooling of the mold, effectively avoids the phenomenon of uneven cooling in the confined space feature area, and greatly improves the quality of the mold.

[0042] It is worth mentioning that, in this embodiment, the air vent control component includes a roller mounting part 42 fixedly installed on the upper surface of the liquid cooling chamber 32, a guide roller 43 rotatably installed in the roller mounting part 42, and fixed column parts 39 symmetrically distributed around the center of the cooling air vent plate 37 at the bottom of the cooling air vent plate 37. Two fixed column parts 39 are respectively fixedly connected to steel wire ropes 40. A fixed ring 44 is fixedly installed on the lifting part 21, and a connecting rope is fixedly connected between the fixed ring 44 and the corresponding two steel wire ropes 40. Cable 41, the connecting rope 41 passes through the guide roller 43. Initially, the mold has just been processed and is ready to descend into the inner cavity of the cooling body 31. At this time, the first cooling vent plate 37 is at the bottom, and the second cooling vent plate 38 is completely exposed. During the process of the lifting part 21 descending from the height, the connecting rope 41 is not under force for a certain distance, at least until the fixing ring 44 descends to be flush with the upper end surface of the liquid cooling chamber 32, until the fixing ring 44 descends into the inner cavity of the liquid cooling chamber 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 finished being processed and descends into the inner cavity of the liquid cooling chamber 32, it will preferentially receive cooling from the airflow on both sides. When the fixing ring 44 descends into the inner cavity of the liquid cooling chamber 32, the mold is located at the upper end face of the liquid cooling chamber 32. The tilt 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 to move up and down to perform cross-cooling of gaseous and liquid states.

[0043] It is also worth mentioning that, for reference Figure 5 In this embodiment, the clamping assembly includes a support plate 22 and a clamping plate 23. The support plate 22 has thickened portions 25 on its front and rear sides, and each thickened portion 25 has a threaded hole. Two threaded posts 24 are rotatably connected to the clamping plate 23, and each threaded post 24 is threaded into the corresponding threaded hole. A connecting portion one 26 is fixedly installed on the lower end face of the support plate 22, and a connecting portion two 27 is fixedly connected to the top of the lifting portion 21. The ball at the top of the connecting portion two 27 is connected to the connecting portion one 26. The mold to be processed is installed on the two support plates 22. At this time, rotating the threaded posts 24 on both sides collects and clamps the clamping plate 23 onto the mold to form the first layer of positioning and fixation. At the same time, the connection between the connecting portion one 26 and the connecting portion two 27 at the bottom facilitates the lifting portion 21 on one side to lift and lower, allowing the mold to tilt.

[0044] It should be noted that the reference Figure 9 , Figure 10 and Figure 11In this embodiment, the clamping assembly includes clamping cavities 13 disposed on both sides of the upper end face of the top plate 10. Each clamping cavity 13 is slidably connected to a clamping plate 11. Slots 16 are equidistantly distributed on the front and rear end faces of the clamping plate 11. Clamping plates 14 are disposed on the front and rear side walls of the clamping cavities 13. Two locking blocks 15 are symmetrically installed on the clamping plates 14 with the center line of the top plate 10 as the center of symmetry. Each locking block 15 can be embedded in a corresponding slot 16. Locking holes 12 are disposed on the front and rear end faces of the top plate 10. Adjustment holes are disposed next to the locking holes 12. A connecting post with a threaded hole is fixedly connected to the clamping plate 14. The connecting column passes through the corresponding locking hole 12, and a locking bolt is rotatably connected to 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 sliding clamping plates 11 abut against the mold, and a hex wrench is inserted into the locking hole 12 for rotation and locking, so that the clamping plate 14 slides towards the mold, thereby allowing the locking block 15 to be embedded into the corresponding slot 16 to form a secondary fixation. After processing, it is only necessary to rotate the locking bolt in the opposite direction to loosen the clamping plate 14 and allow the locking block 15 to disengage from the slot 16. At this time, without 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 as trapezoidal, the diameter at the inner cavity opening is larger than the diameter at the bottom of the inner cavity, the middle of the locking block 15 is provided with a through groove, the locking block 15 is inserted into the slot 16, and the two end faces of the locking block 15 are pressed into the inner cavity of the slot 16, generating a pressing force in the opposite direction to fix it outward.

[0046] During actual runtime:

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

[0048] The confined space characteristics of side a of the mold:

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

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

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

[0052] First, install the mold on the clamping assembly. Rotate the threaded column 24 to clamp the clamping plate 23 onto the mold sidewall. Insert the hex wrench into the locking hole 12 and tighten the bolt to move the clamping plate 14, allowing the trapezoidal locking block 15 to wedge into the slot 16, thereby generating radial locking force. After installation, the machining module 7 performs deep hole / narrow slot machining, while the side-mounted cutting fluid delivery pipe 9 sprays cutting fluid. Deep hole A: uses a 1.45mm carbide drill bit (internal cooling pressure 15MPa), narrow slot B: uses a 0.8mm end mill, MQL micro-lubrication. After machining, loosen the locking bolt to allow the locking block 15 to exit the slot 16. At this time, due to the multiple restricted space features on side a, the dual-axis hydraulic system performs differentiated machining. The mold descends with its tilt angle set to 20°. Initially, the mold descends normally, receiving priority cooling from the airflow on both sides as it descends into the inner cavity of the liquid cooling chamber 32. The cooling airflow generated by the cooling fan 4 enters the air cooling chambers 34 on both sides. When the fixing ring 44 descends into the inner cavity of the liquid cooling chamber 32, the mold is located at the upper end face of the liquid cooling chamber 32. The tilt angle of the mold is then adjusted according to the characteristics of the confined space. The lifting part 21 on side a descends by 80mm. Maintaining this tilt angle, both lifting parts 21 are controlled to descend together and sink into the liquid cooling medium for liquid cooling. Subsequently, they rise together to the liquid surface. Because the tilt angle is maintained, the two sides... The connecting rope 41 pulls the corresponding cooling air vent plate 37 upwards by a corresponding distance. The cooling air vent plate 37 on side a moves upwards, covering 60% of the area of ​​the cooling air vent plate 38, while the coverage on the other side is only 15%. This causes a change in the air vents. The bottom air vent diameter on side a is 0.3mm, with an airflow velocity of 120m / s, while the top air vent diameter is 0.8mm, with an airflow velocity of 40m / s. Since most of the deep holes and narrow slits are on side a of the mold, side a is tilted at this time. The deep holes and narrow slits basically correspond to the air vents at the bottom of side a, while the other side corresponds to the top of side a. The cooling airflow is accelerated through the air cooling chamber 34 and forms a high-speed gradient airflow through the cooling air vent plate 37, using the air column to cool the liquid. The mold is air-cooled, and the impact of the airflow also disperses the film formed by the liquid cooling medium. This causes the liquid cooling medium to form a mist under the impact of the high-speed airflow and penetrate into the deeper layers for cooling. This comprehensively improves the cooling of the mold and effectively avoids uneven cooling in confined space areas, greatly improving the quality of the mold. Then, the mold is submerged in the liquid cooling medium again for further cooling. Finally, after cooling is complete, the mold is removed. The alternating cooling of air and liquid effectively avoids the reduction in mold quality caused by temperature differences at the bottom of holes and seams compared to traditional cooling methods, which can lead to differences in hardness between the mold and other parts.

[0053] In summary, this invention utilizes the confined space features processed within the mold to tilt the mold at the corresponding angle, employing a combination of liquid and air cooling for temperature reduction. The liquid cooling penetrates into the shallow layer, while the pneumatic breaking of the surface film forms atomized droplets that penetrate deep into the confined space, achieving full-area, dead-angle-free cooling of confined space features such as deep holes / narrow slits. This effectively avoids mold scrapping due to localized failures, significantly extending the mold's lifespan.

[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 variations or substitutions conceived without inventive effort should be included within the scope of protection of the invention. Therefore, the scope of protection of the invention should be determined by the scope defined in the claims.

Claims

1. A rapid cooling molding equipment for plastic mold steel, comprising a dual-axis 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 installed on the upper side wall of the inner cavity of the cooling body (31). A second cooling air vent plate (38) is fixedly installed at the air outlet of the air cooling chamber (34). Slide sections (36) are fixedly installed on the lower end face of the air cooling chamber (34) on the front and rear sides respectively. A first cooling air vent plate (37) is slidably installed between the two slide sections (36). The first cooling air vent plate (37) slides upward through the bottom of the second cooling air vent plate (38). The diameter of the air holes in the first cooling air vent plate (37) is smaller than the diameter of the air holes in the second cooling air vent plate (38). The diameter of the air holes in the first perforated plate (37) gradually decreases from top to bottom. The dual-axis hydraulic lifting system (1) includes a lifting part (21). The lifting part (21) extends upward and penetrates into the inner cavity of the cooling machine body (31). An air hole control component is installed between the lifting part (21) and the first cooling air hole plate (37). The up and down movement of the lifting part (21) drives the first cooling air hole plate (37) to slide. The area of ​​the first cooling air hole plate (37) covering the second cooling air hole plate (38) is controlled to control the air holes. According to the structural shape of the processing mold, the lifting height of the two lifting parts (21) on the left and right is controlled so that the mold forms a corresponding tilt angle to align with the matching air holes for cross cooling of gaseous and liquid states.

2. The rapid cooling molding equipment for plastic mold steel according to claim 1, characterized in that: The liquid cooling assembly includes a liquid cooling chamber (32) fixedly installed at the bottom of the inner cavity of the cooling body (31). There is a cavity between the liquid cooling chamber (32) and the inner cavity sidewall of the cooling body (31). A return cooling pipe (33) is installed around the outer end of the liquid cooling chamber (32). The inlet and outlet of the return cooling pipe (33) are connected to the inner cavity of the liquid cooling chamber (32).

3. The rapid cooling molding equipment for plastic mold steel according to claim 2, characterized in that: The air vent control assembly includes a roller mounting part (42) fixedly installed on the upper end face of the liquid cooling chamber (32). A guide roller (43) is rotatably installed in the roller mounting part (42). Fixed column parts (39) are symmetrically distributed around the center of the cooling air vent plate (37) at the bottom. Steel wire ropes (40) are fixedly connected to the two fixed column parts (39). A fixed ring (44) is fixedly installed on the lifting part (21). A connecting rope (41) is fixedly connected between the fixed ring (44) and the two corresponding steel wire ropes (40). The connecting rope (41) passes through the guide roller (43).

4. The rapid cooling molding equipment 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. 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). Each thickened part (25) is provided with a threaded hole. Two threaded posts (24) are rotatably connected on the clamping plate (23). Each threaded post (24) is threaded into the corresponding threaded hole. A connecting part one (26) is fixedly installed on the lower end face of the support plate (22). A connecting part two (27) is fixedly connected to the top of the lifting part (21). The ball at the top of the connecting part two (27) is connected to the connecting part one (26).

5. The rapid cooling molding equipment 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. The clamping assembly includes clamping slide cavities (13) on both sides of the upper end face of the top plate (10). Each clamping slide cavity (13) is slidably connected with a clamping plate (11). The front and rear end faces of the clamping plate (11) are provided with slots (16) at equal intervals. The front and rear side walls of the clamping slide cavity (13) are provided with clamping plates (14). The clamping plates (14) are symmetrically installed with two locking parts (15) on the left and right sides with the center line of the top plate (10) as the center of symmetry. Each locking part (15) can be embedded in the corresponding slot (16).

6. The rapid cooling molding equipment for plastic mold steel according to claim 5, characterized in that: The slot (16) is trapezoidal in shape, with the diameter at the inner opening being larger than the diameter at the bottom of the inner cavity. A through slot is provided in the middle of the locking block (15). The locking block (15) is inserted into the slot (16), and the two end faces of the locking block (15) are pressed into the inner cavity of the slot (16), generating a pressing force in the opposite direction to fix it.

7. The rapid cooling molding equipment for plastic mold steel according to claim 6, characterized in that: Locking holes (12) are respectively provided on the front and rear ends of the top plate (10). A connecting column with a threaded hole is fixedly connected to the clamping plate (14). The connecting column passes through the corresponding locking hole (12). 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 equipment for plastic mold steel according to claim 7, characterized in that: The structural shape of the processing mold includes the characteristics of the restricted space for processing, and the restricted space characteristics are structural features of deep holes, narrow slits, irregular deep cavities and cross holes.

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

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

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