Auxiliary cooling equipment for aluminum alloy die casting

Abstract

The application discloses an auxiliary cooling equipment for aluminum alloy die casting, and relates to the technical field of aluminum alloy die casting, comprising a die casting die mechanism for aluminum alloy die casting forming; the die casting die mechanism comprises a fixed die for forming; an auxiliary cooling mechanism is installed on the die casting die mechanism and used for auxiliary cooling of the die; the auxiliary cooling mechanism comprises a channel one which is linearly arranged in the fixed die. The double-mode switchable modular cooling is suitable for various aluminum alloy castings, reduces die modification cost, and the equipment has two waterway modes of global basic cooling and pin-point reinforced cooling. The two waterway modes can be flexibly selected according to the castings and heat distribution, new cooling holes are not needed to be processed, only the pins or the blocking covers are replaced, different products can be adapted, die modification time and processing cost are greatly saved, the pins are deeply inserted into the cavity to radiate heat near the hot spots, die casting defects such as shrinkage and die sticking are effectively eliminated, the forming qualified rate of the castings is improved, the single-piece cooling cycle is shortened, and the die casting productivity is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy die casting technology, and in particular to an auxiliary cooling device for aluminum alloy die casting. Background Technology

[0002] In simple terms, aluminum alloy die casting involves melting aluminum ingots into liquid aluminum, then using a die casting machine to extrude it into a closed mold cavity under high pressure and high speed. After cooling, the mold is opened and the metal part is ejected. The process consists of five main stages: melting → mold preheating → die casting filling → cooling and shaping → part removal and post-processing.

[0003] However, in practical applications, there are still some unresolved problems. The following are some common problems of cooling equipment for aluminum alloy die casting: poor heat dissipation in thick-walled areas, deep cavities, and areas with concentrated heat in aluminum alloy die casting molds, resulting in excessively high local temperatures. Local overheating of the mold causes quality defects such as casting sticking, shrinkage cavities, and porosity, resulting in low finished product qualification rates. Long-term local high temperatures exacerbate thermal fatigue wear of key mold components such as inserts and insert blocks, shortening the mold's service life and increasing mold replacement and repair costs. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing auxiliary cooling equipment for aluminum alloy die casting, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the problem that traditional cooling only dissipates heat from the outside of the cavity, resulting in local heat accumulation in the thick walls and deep cavities of the casting, causing many molding defects, and long-term local high temperature aggravates the wear of insert pins and shortens the service life of the mold.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an auxiliary cooling device for aluminum alloy die casting, comprising: a die casting mold mechanism for die casting aluminum alloy; including a fixed mold for forming; an auxiliary cooling mechanism installed on the die casting mold mechanism for auxiliary cooling of the mold; the auxiliary cooling mechanism includes: a plurality of channels arranged in a linear array within the fixed mold; used to dissipate heat near the outer wall of the fixed mold cavity, with coolant flowing within them to continuously remove residual heat from the forming part of the fixed mold, thereby achieving uniform cooling of the mold; a plurality of tanks arranged in a linear array on the fixed mold and communicating with the channels; and valves. There are several mold inserts, each corresponding to one of the multiple tanks and penetrating the mold, used to control the flow of coolant in channel one; several mold inserts, each corresponding to one of the tanks; several connecting parts, the same number as the mold inserts, installed at the lower end of the mold inserts and connected to them, the connecting parts are inserted into the tanks and abut against the valve, used to convert the coolant flowing through the valve into flowing into channel one through the connecting parts and mold inserts, for directional cooling of the local high-temperature areas of the mold; several plugs, installed in the tanks where no mold inserts are installed, used to seal the excess tank openings.

[0008] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the valve component includes: a valve column that slides within the groove; a valve hole that is opened on the valve column and cooperates with a channel; and a spline rod that slides through the fixed mold and extends one end into the groove and is fixed to the surface of the valve column.

[0009] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the valve further includes: a spring, sleeved on one end surface of the spline rod, with both ends fixed between the valve column surface and the inner wall of the groove; and a limiting block, fixed to one end of the spline rod located outside the fixed mold.

[0010] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the tank body includes a threaded groove portion formed thereon, and the plug is threadedly connected to the threaded groove portion.

[0011] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the mold insert includes: a rod body, one end of which is inserted into a groove; a cover body, which is fixedly connected to one end of the rod body located in the inner cavity of the fixed mold; a circular groove, which is formed in the rod body and the cover body; and flow channels, which are formed in a circumferential array on the rod body and respectively cooperate with the circular groove and the connecting piece.

[0012] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the mold insert further includes a threaded portion opened at the end of the rod away from the cover, and the threaded portion is threadedly connected to the threaded groove portion. One end of the rod is provided with a locking hole distributed in a circumferential array, and one end of the rod is provided with a chamfered portion. Both the locking hole and the chamfered portion are engaged with the connecting piece.

[0013] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the connecting member includes: a connecting column, one end of which is inserted into the groove and abuts against the valve column, and the other end of which is inserted into one end of the rod; flow holes, arranged in a circumferential array on the connecting column, and respectively cooperating with channel one and flow channel; mounting grooves, arranged in a circumferential array on one end of the connecting column; several locking blocks, which slide in corresponding mounting grooves and cooperate with locking holes; and two springs, arranged in a circumferential array and fixed between the inner wall of the mounting groove and the surface of the locking blocks.

[0014] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting described in this invention, the connecting member further includes: several unlocking plates, which slide in corresponding mounting slots; unlocking holes, which are formed on the locking block and cooperate with one end of the unlocking plate; short columns, which slide in a circumferential array on the connecting column and are fixed to the surface of the unlocking plate; three springs, which are distributed in a circumferential array and are fixed between the surface of the connecting column and the surface of the short columns; and a ring body, which is slidably sleeved on the surface of the connecting column and cooperates with the short columns.

[0015] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting according to the present invention, the die casting mold mechanism further includes: an ejector assembly installed on the fixed mold; a base fixed on the fixed mold; and a moving plate fixed on the moving mold.

[0016] As a preferred embodiment of the auxiliary cooling device for aluminum alloy die casting according to the present invention, the auxiliary cooling mechanism further includes: a water inlet pipe, fixed to one side of the fixed mold and connected to channel one; a water outlet pipe, fixed to the other side of the fixed mold and connected to channel one; channel two, which is linearly arrayed in the moving mold; a water inlet pipe two, fixed to one side of the moving mold and connected to channel one; and a water outlet pipe two, fixed to the other side of the moving mold and connected to channel one.

[0017] The beneficial effects of this invention are as follows: 1. Dual-mode switchable modular cooling, adaptable to various aluminum alloy castings, reducing mold modification costs. The equipment has two water circuit modes: full-area basic cooling and pin-point enhanced cooling. It can be flexibly selected according to the casting and heat distribution. There is no need to process new cooling holes. Only the pins or plugs need to be replaced to adapt to different products, which greatly saves mold modification time and processing costs. The pins penetrate deep into the cavity to dissipate heat from hot spots at close range, effectively eliminating die casting defects such as shrinkage porosity and sticking, improving the casting forming qualification rate, shortening the cooling cycle of a single piece, and increasing die casting capacity.

[0018] 2. Quick-release components + dual circulation of moving and stationary molds ensure convenient operation and maintenance, uniform mold temperature, and flexible snap-fit ​​structure for mold inserts and connecting parts, allowing for fast inspection and replacement without interrupting continuous die-casting production. All water circuit assembly points are reliably sealed, and there is no risk of leakage of high-pressure cooling water. The fixed mold and moving mold are equipped with independent circulating cooling pipes, with simultaneous heat dissipation on both sides, reducing the alternating thermal stress of the mold. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of an auxiliary cooling device for aluminum alloy die casting.

[0021] Figure 2 This is a partial 3D view of an auxiliary cooling device used in aluminum alloy die casting.

[0022] Figure 3 This is a partial sectional perspective view of an auxiliary cooling device for aluminum alloy die casting.

[0023] Figure 4 Auxiliary cooling equipment for aluminum alloy die casting Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 Auxiliary cooling equipment for aluminum alloy die casting Figure 3 Enlarged view of section B in the middle.

[0025] Figure 6 Auxiliary cooling equipment for aluminum alloy die casting Figure 3 Enlarged view of point C.

[0026] Figure 7 A three-dimensional view of the rod and connecting column of an auxiliary cooling device for aluminum alloy die casting.

[0027] Figure 8 A three-dimensional view of the ring and connecting column of the auxiliary cooling equipment for aluminum alloy die casting.

[0028] Figure 9 A partial sectional perspective view of the fixed mold for an auxiliary cooling device used in aluminum alloy die casting.

[0029] Figure 10 A three-dimensional view of the valve column and spline rod of an auxiliary cooling device for aluminum alloy die casting.

[0030] Figure 11Partial sectional perspective view of the connecting column and clamping block of the auxiliary cooling equipment for aluminum alloy die casting.

[0031] Figure 12 A partial sectional perspective view of the moving mold for an auxiliary cooling device used in aluminum alloy die casting.

[0032] In the diagram: 1. Die-casting mold mechanism; 11. Fixed mold; 12. Moving mold; 13. Ejection assembly; 14. Base; 15. Moving plate; 2. Auxiliary cooling mechanism; 21. Channel 1; 22. Tank; 23. Valve; 24. Connecting component; 25. Mold insert; 26. Plug cap; 27. Inlet water pipe 1; 28. Outlet water pipe 1; 29. ​​Channel 2; 210. Inlet water pipe 2; 211. Outlet water pipe 2; 221. Threaded section; 231. Valve 232. Column; 233. Valve hole; 234. Spline rod; 235. Spring 1; 236. Limiting block; 251. Rod body; 252. Cover body; 253. Circular groove; 254. Flow channel; 255. Threaded part; 256. Locking hole; 241. Connecting column; 242. Flow hole; 243. Mounting groove; 244. Locking block; 245. Spring 2; 246. Unlocking plate; 247. Unlocking hole; 248. Short column; 249. Spring 3; 2410. Ring body. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1, referring to Figures 1-3 This is the first embodiment of the present invention. This embodiment provides an auxiliary cooling device for aluminum alloy die casting. The auxiliary cooling device for aluminum alloy die casting includes a die casting mold mechanism 1 and an auxiliary cooling mechanism 2.

[0037] Specifically, the die-casting mold mechanism 1 is used for die-casting aluminum alloys; it includes a fixed mold 11 for forming, and the main forming mechanism of the die-casting mold mechanism 1 is existing technology, which is clearly known to those skilled in the art and will not be described in detail here. The fixed mold 11 undertakes the casting, pressure holding and forming operations of the aluminum alloy melt, and is the installation carrier of the cooling structure. It is existing technology, which is clearly known to those skilled in the art and will not be described in detail here. The cooling channel, valve structure and insert structure are integrated inside the fixed mold 11 without compromising the overall structural strength of the mold.

[0038] Specifically, the auxiliary cooling mechanism 2 is installed on the die-casting mold mechanism 1 and is used to provide auxiliary cooling for the mold. The auxiliary cooling mechanism 2 is the core innovative system of the whole machine. It adopts an array-type multi-channel modular cooling structure and supports flexible switching of cooling modes.

[0039] The auxiliary cooling mechanism 2 includes: a number of channels 21 arranged in a linear array within the fixed mold 11; used to dissipate heat from the vicinity of the outer wall of the cavity of the fixed mold 11, with coolant flowing within them to continuously remove residual heat from the forming part of the fixed mold 11, thereby achieving uniform cooling of the mold. The channels 21 are arranged to conform to the contour of the outer wall of the mold cavity, and under normal conditions, the coolant flows directly within the channels 21 to remove the overall residual heat from the forming area of ​​the mold.

[0040] The groove 22, in a linear array, is opened on the fixed mold 11 and communicates with the channel 21. The groove 22 provides the mounting reference for the valve 23, mold insert 25, connecting part 24 and plug cover 26, and is a structural transition cavity for switching cooling modes.

[0041] There are several valve components 23, each corresponding to one of the multiple tanks 22 and penetrating through the fixed mold 11. They are used to control the flow of coolant in channel 1 21. The valve component 23 is the core of the on / off control inside the tank 22. It can switch the coolant flow path of channel 1 21 to achieve the switching between two modes: "direct cooling" and "pin-directed cooling".

[0042] The mold inserts 25 are numerous and are installed in corresponding slots 22. The mold inserts 25 are directional cooling components for local high temperature, thick wall and deep cavity hot spots in the mold. They have built-in independent flow channels to guide the coolant to the deepest part of the mold and the molding area with the most concentrated heat, so as to achieve targeted and powerful cooling. The inserts can be replaced by inserts with internal cooling channels to directionally cool the local high temperature areas of the mold to adapt to the outer contour of different product bodies.

[0043] The number of connecting parts 24 is the same as the number of mold inserts 25, and they are installed at the lower end of the mold inserts 25 and connected to them. The connecting parts 24 are inserted into the groove 22 and abut against the valve 23. They are used to close the coolant passing through the valve 23 and convert it to flow into the channel 21 through the connecting parts 24 and the mold inserts 25, so as to provide directional cooling for the local high temperature area of ​​the mold. In view of the problem of difficult heat dissipation in the local thick-walled area, deep cavity and heat concentration area during the aluminum alloy die casting process, this solution can effectively improve the defects such as sticking, shrinkage cavity and porosity caused by local overheating, improve the product molding quality, shorten the production cycle and extend the service life of key mold components. For parts with complex structure and difficult to achieve by traditional processing methods, the mold inserts 25 can adopt a 3D printed conformal cooling channel structure to improve cooling efficiency and cooling uniformity.

[0044] The connecting component 24 is a flow guide and transition structure that connects the valve component 23 and the mold insert pin 25. With the action of the valve component 23, the original straight channel is closed, and the coolant is forced to flow through the internal flow channel of the insert pin, so as to achieve precise reversal of the cooling path.

[0045] The plug 26, in several units, is installed in the groove 22 where the mold insert 25 is not installed. It is used to seal the excess openings of the groove 22 to prevent coolant leakage. At the same time, the mold insert 25 or the plug 26 can be flexibly selected to be installed according to the structure and heat distribution of the aluminum alloy workpiece in actual production, so as to adjust the position of local cooling and adapt to the cooling requirements of different workpieces. There is no need to re-modify the overall structure of the equipment, which improves the versatility and flexibility of the equipment.

[0046] The plug cover 26 is a modular sealing accessory that seals the position of the tank 22 where local cooling is not required, preventing coolant leakage. Depending on the structure and wall thickness differences of each batch of aluminum alloy castings, either the "pin cooling module" or the "plug sealing module" can be freely selected. No mold modification or re-drilling and grooving is required, which greatly improves the versatility and adaptability of the mold cooling system. The valve 23, the connecting part 24, the mold pin 25 and the plug cover 26 are all sealed with the tank 22.

[0047] Example 2, refer to Figures 3 to 11 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0048] Specifically, the basic sliding conduction structure of the limited valve component 23 is the core actuator for switching the cooling path, realizing on / off switching. It is resistant to high temperature and oil, and is suitable for high temperature working conditions of die casting. The valve component 23 includes: valve column 231, which slides in the groove 22. The valve column 231 and the groove 22 are sealed. The valve column 231 is a cylindrical sliding valve core that precisely matches the inner diameter of the groove 22 and can slide stably along the axial direction of the groove 22 to realize the switching of channel blocking and conduction.

[0049] Valve hole 232 is opened on valve post 231 and cooperates with channel 21. After valve post 231 slides into position, valve 232 aligns with channel 21, allowing coolant to flow directly. When misaligned, channel 21 connects with connector 24. Spline rod 233 slides through fixed mold 11, with one end extending into groove 22 and fixed to the surface of valve post 231. Spline rod 233 is an anti-rotation guide transmission rod. The spline structure ensures that valve post 231 can only slide axially and cannot rotate circumferentially, ensuring precise alignment of valve hole 232 and channel 21 and preventing on / off failure caused by rotational misalignment.

[0050] Specifically, valve component 23 also includes: a spring 234, which is sleeved on one end of the spline rod 233 and fixed at both ends between the surface of the valve column 231 and the inner wall of the groove 22, respectively. The spring 234 is a reset elastic element that provides a stable reset elastic force under normal conditions to maintain the normal conduction state of the valve column 231; and a limit block 235, which is fixed to one end of the spline rod 233 located outside the fixed mold 11. The limit block 235 limits the maximum sliding stroke of the valve column 231, matches the critical position of the valve hole 232, and prevents excessive displacement of the valve column 231 to ensure that the valve core displacement is accurate and controllable.

[0051] Under normal conditions, spring 234 pushes valve stem 231, and spline rod 233 slides axially, causing valve stem 231 to move precisely within groove 22. When valve hole 232 coincides with channel 21, coolant directly flows through channel 21, maintaining the conductive position for overall mold cooling. After assembling insert pin and connecting piece 24, the end of connecting piece 24 presses against valve stem 231, overcoming the elasticity of spring 234 to achieve misalignment and blockage of valve hole 232, connecting channel 21 with connecting piece 24, cutting off the normal direct path, and forcing coolant to flow through the connecting piece. When the connecting piece 24 enters the mold insert 25, it switches to the overall and partial directional cooling mode. After the insert is removed, the spring 234 automatically returns to its original position, and the valve hole 232 realigns with the channel 21, restoring the normal cooling mode and achieving automatic reset switching. During the removal of the mold insert 25 and the connecting piece 24, the valve 23 automatically resets to seal the groove 22, preventing a large amount of coolant from flowing out of the channel 21. At the same time, the valve hole 232 on the valve post 231 realigns with the channel 21, restoring the normal cooling mode.

[0052] Specifically, the groove 22 includes a threaded groove 221 formed thereon, and the plug 26 is threadedly connected to the threaded groove 221. The threaded groove 221 provides a detachable threaded fixing reference for the plug 26 and the mold insert 25, realizing modular quick disassembly and assembly, and sealing and locking. The threaded groove 221 has a standard thread structure, and the plug 26 is provided with matching threads on the outside. The two are screwed together to achieve gapless sealing and plugging, which is convenient to disassemble and assemble and has stable sealing.

[0053] For the tank 22 position where local cooling is not required, the plug 26 can be directly screwed into the screw groove 221 to seal the opening of the tank 22, close the excess water passage, and prevent high-pressure coolant leakage and aluminum alloy molten metal entry. When it is necessary to install the insert, the plug 26 can be screwed out to reserve the assembly position. No secondary processing of molds is required, and the cooling module can be quickly switched.

[0054] Specifically, the mold insert 25 is the core execution component for localized hot spot directional cooling. It penetrates deep into the high-temperature area of ​​the mold cavity to achieve efficient heat dissipation at close range. The mold insert 25 includes: a rod 251, one end of which is inserted into the groove 22. The rod 251 and the groove 22 are sealed. The rod 251 is the main support structure of the insert, with sufficient rigidity to withstand the high temperature and impact of die casting; and a cover 252, which is fixedly connected to one end of the rod 251 located in the inner cavity of the fixed mold 11.

[0055] A circular groove 253 is formed inside the rod body 251 and the cover body 252; several flow channels 254 are formed in a circular array on the rod body 251 and cooperate with the circular groove 253 and the connecting piece 24 respectively. The circular groove 253 receives the coolant introduced by the connecting piece 24 to form a central water storage and guiding cavity. The flow channel 254 realizes the diversion of coolant, from the root of the insert pin to the high temperature area at the top, and fully wraps the insert pin base to quickly remove the local heat accumulated in the mold.

[0056] It is important to note that the flow channel 254 has a uniform orifice diameter and is free from blockages, ensuring consistent flow distribution and uniform cooling. The mold insert 25 is made of high-temperature resistant, high-hardness mold steel, which is resistant to thermal shock and not easily deformed.

[0057] The coolant enters the flow channel 254 and the circular groove 253 through the connecting part 24, and is evenly transported upward to the top of the insert through the circumferential array flow channel 254. It absorbs heat and cools the hot spots in the deep cavity and thick wall of the mold at close range, and then flows back into the channel 21 to complete the water circulation. The multi-flow channel 254 array structure ensures that the overall temperature of the insert is uniform and that the mold thermal stress cracking caused by excessive local temperature difference will not occur.

[0058] Specifically, the mold insert 25 also includes a threaded portion 255 at the end of the rod 251 away from the cover 252, and the threaded portion 255 is threadedly connected to the threaded groove portion 221. The threaded portion 255 realizes the threaded locking and fixing of the insert, which is convenient for disassembly and assembly and has a firm positioning. One end of the rod 251 has a locking hole 256 distributed in a circumferential array, and one end of the rod 251 is provided with a chamfered portion. Both the locking hole 256 and the chamfered portion cooperate with the connecting member 24. The locking hole 256 is used to cooperate with the locking block 244 on the connecting member 24 to realize quick locking and positioning and axial locking. The chamfered portion facilitates the quick insertion and alignment of the connecting member 24. It should be noted that the thread locking force is moderate to avoid deformation of the insert due to excessive tightness and leakage or vibration due to excessive looseness.

[0059] Example 3, referring to Figures 1-12 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0060] Specifically, the connecting component 24 is a quick-connect, flexible snap-fit, and flow-directing structure. It is a key component for water circuit switching, sealing connection, and quick assembly. The connecting component 24 includes: a connecting post 241, one end of which is inserted into the groove 22 and abuts against the valve post 231, and the other end of which is inserted into one end of the rod 251. The connecting post 241 is the main insertion base, one end of which abuts against the valve post 231, and the other end is inserted into the rod 251 on the insert pin to realize water circuit switching. The connecting post 241 is sealed with the rod 251 and the valve post 231 respectively.

[0061] Several flow holes 242, arranged in a circular array, are formed on the connecting post 241 and respectively mate with channel 21 and flow channel 254. The flow holes 242 are circular arrayed guide holes, precisely connecting channel 21 and flow channel 254 on the insert pin to achieve coolant diversion and flow guidance. Several mounting slots 243, arranged in a circular array, are formed at one end of the connecting post 241. The mounting slots 243 provide assembly space for the retaining block 244 and spring 245. Several retaining blocks 244, corresponding to… The locking block 244 slides within the corresponding mounting slot 243 and engages with the locking hole 256. One end of the locking block 244 is chamfered and engages with the chamfered portion. Several springs 245 are arranged in a circumferential array and fixed between the inner wall of the mounting slot 243 and the surface of the locking block 244. The locking block 244 and the springs 245 form an elastic locking and positioning structure. The chamfered end of the locking block 244 is adapted to the chamfered portion on the insert. It automatically retracts during insertion and automatically pops out and engages with the locking hole 256 after reaching the correct position, achieving tool-free quick locking.

[0062] When assembling the connecting piece 24, the chamfered guide fit causes the locking block 244 to be compressed and contracted. After being inserted into place, the second spring 245 pushes the locking block 244 out and into the locking hole 256, realizing the axial locking and fixation of the connecting piece 24 and the insert pin. Then, the mold insert pin 25 is inserted into the groove 22, moved and rotated, and the mold insert pin 25 is threadedly installed in the groove 22. At the same time, the end of the connecting column 241 presses against the valve column 231, causing the valve hole 232 to be misaligned with the channel 21, connecting the connecting piece 24 with the channel 21, cutting off the conventional water path. The coolant enters the insert pin through the flow hole 242, flow channel 254 and circular groove 253, completing the directional cooling switch.

[0063] Specifically, the connecting member 24 also includes: a number of unlocking plates 246, which slide in corresponding mounting slots 243; one end of which is provided with an inclined surface; an unlocking hole 247, which is opened on the locking block 244 and cooperates with one end of the unlocking plate 246; an inclined surface 247 is provided on the unlocking hole 247, and the inclined surface 1 cooperates with the inclined surface 246. The unlocking plate 246, the inclined surface 1, the unlocking hole 247 and the inclined surface 2 are inclined surface-to-top transmission structures, realizing the conversion of vertical thrust into lateral contraction power.

[0064] Several short posts 248 are arranged in a circular array and slide on the connecting post 241, and are fixed to the surface of the unlocking plate 246. Several springs 249 are arranged in a circular array and are fixed between the surface of the connecting post 241 and the surface of the short posts 248. The short posts 248 and the springs 249 are the elastic reset structure of the unlocking plate 246, which maintains the initial position of the unlocking plate 246 under normal conditions. The ring 2410 is slidably sleeved on the surface of the connecting post 241 and cooperates with the short posts 248. The diameter of the ring 2410 is smaller than the diameter of the connecting post 241. The ring 2410 is a sliding operating component. Axial pressing of the ring 2410 can move the short posts 248 and the unlocking plate 246, thereby realizing the retraction and unlocking of the locking block 244.

[0065] Under normal conditions, spring 249 pushes the unlocking plate 246 to reset, and the locking block 244 remains in the pop-out locked state. When it is necessary to disassemble or replace the connecting piece 24 and the mold insert 25, the ring body 2410 is pushed axially, which in turn pushes the short column 248 and the unlocking plate 246 to move. The inclined surface cooperates to squeeze the locking block 244 to retract inward and disengage from the locking hole 256, thus releasing the lock. The connecting piece 24 can be directly pulled out from the mold insert 25. After the ring body 2410 is released, the structure automatically resets and can be reassembled and locked.

[0066] Specifically, the die-casting mold mechanism 1 also includes: an ejector assembly 13, mounted on the fixed mold 11; a base 14, fixed on the fixed mold 11; and a moving plate 15, fixed on the moving mold 12. The ejector assembly 13 is used to eject the aluminum alloy casting after die casting, which is existing technology. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here. The moving plate 15 is a mounting plate for the moving mold 12, which works with the fixed mold 11 to realize mold closing, mold locking, and forming operations.

[0067] Specifically, the auxiliary cooling mechanism 2 also includes: a water inlet pipe 27, fixed to one side of the fixed mold 11 and connected to channel 21; a water outlet pipe 28, fixed to the other side of the fixed mold 11 and connected to channel 21. The water inlet pipe 27 and the water outlet pipe 28 serve as the water circulation inlet and outlet of the fixed mold 11, providing a stable circulating water source for channel 21; several channels 29, arranged in a linear array within the moving mold 12, enabling synchronous heat dissipation of the moving mold 12; a water inlet pipe 210, fixed to one side of the moving mold 12 and connected to channel 21; and a water outlet pipe 211, fixed to the other side of the moving mold 12 and connected to channel 21. The water inlet pipe 210 and the water outlet pipe 211 serve as independent water circulation inlet and outlet of the moving mold 12, enabling independent circulating cooling of both the moving and stationary molds, with balanced and synchronized temperature.

[0068] Cooling water enters the internal channels of the fixed mold 11 and the moving mold 12 through two sets of inlet water pipes to achieve synchronous heat absorption on both sides. It then flows back and circulates from the outlet water pipes. In conjunction with the switchable cooling module of the fixed mold 11, a combined heat dissipation mode of uniform cooling of the entire mold and enhanced cooling of local hot spots can be achieved.

[0069] It should be noted that the overall structure of this equipment fully meets the requirements of aluminum alloy die casting production. The structure of each mechanism is matched, the assembly is rigorous, and the action is reliable. The entire structure is suitable for the harsh production environment of die casting, including high temperature, high pressure, alternating hot and cold impacts, and high frequency vibrations. The structural strength, sealing performance, and motion matching accuracy can all meet the mass production standards. The springs are resistant to high temperature and fatigue, and are suitable for the long-term alternating hot and cold working conditions of the mold, avoiding the failure of elasticity decay.

[0070] In use, the basic full-area cooling mode is as follows: when the workpiece wall thickness is uniform and there are no concentrated hot spots, the plug cover 26 is installed in the groove 22 to seal the pin assembly position. Under the thrust of the spring 234, the valve hole 232 of the valve 23 is aligned with the channel 21. The cooling water flows through the inlet water pipe 27 through the channel 21 and circulates along the outer wall of the cavity to carry away the heat of the mold as a whole, thus completing the normal uniform cooling.

[0071] Localized enhanced cooling mode: When there are thick-walled, deep-cavity high-temperature areas in the casting, unscrew the plug 26, assemble the connecting piece 24 and the mold insert 25, screw the insert thread into the groove, the end of the connecting piece 24 presses against the valve column 231 to compress the spring 234, the valve hole 232 and the channel 21 are misaligned, cutting off the direct water passage, the cooling water is forced to flow through the connecting piece 24 into the internal circumferential flow channel 254 of the insert, directly reaching the hot spot area deep in the cavity to absorb heat at close range, completing localized enhanced heat dissipation, after removing the insert, the spring 234 automatically resets, and the water passage resumes full-area cooling.

[0072] Quick-release and sealing of the insert pin: When the connecting piece 24 is inserted into the rod body 251, the chamfered guide block 244 retracts. After it is in place, the spring 245 pops out the block 244 and locks it into the hole 256 to achieve axial locking. Pressing the ring body 2410 drives the unlocking plate 246 to squeeze the block 244 on the slope to unlock and pull it out. No tools are required for quick replacement. All assembly positions are equipped with sealing structures to prevent leakage of high-pressure cooling water.

[0073] Dual-mold synchronous temperature control: The stationary mold 11 relies on channel 1 21 for circulating cooling, while the moving mold 12 is equipped with an independent channel 2 29 and inlet / outlet pipes. The two sets of water circuits for the moving and stationary molds circulate independently and control the temperature synchronously, reducing the overall temperature difference of the mold and reducing thermal deformation.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An auxiliary cooling device for aluminum alloy die casting, characterized in that: include, A die-casting mold mechanism (1) is used for die-casting aluminum alloys; it includes a fixed mold (11) for forming. An auxiliary cooling mechanism (2) is installed on the die-casting mold mechanism (1) and is used to provide auxiliary cooling for the mold. The auxiliary cooling mechanism (2) includes: a number of channels (21) arranged in a linear array within the fixed mold (11); used to conduct heat away from the outer wall of the cavity of the fixed mold (11), and coolant flows within them to continuously remove residual heat from the forming part of the fixed mold (11) and achieve uniform cooling of the mold; a number of tanks (22) arranged in a linear array on the fixed mold (11) and connected to the channels (21); a number of valves (23) installed in multiple tanks (22) and penetrating the fixed mold (11) to control the flow of coolant in the channels (21); and a number of mold inserts (25) installed in corresponding tanks (22). Connecting parts (24), in a number equal to the number of mold inserts (25), are installed at the lower end of the mold inserts (25) and connected to them. Connecting parts (24) are inserted into the groove (22) and abut against the valve (23) to close the coolant passing through the valve (23) and convert it into flowing into the channel (21) through the connecting parts (24) and the mold inserts (25) to provide directional cooling for the local high temperature area of ​​the mold. Blocking caps (26), in a number equal to the number of the mold inserts (25), are installed in the groove (22) where no mold inserts (25) are installed to block the excess openings of the groove (22).

2. The auxiliary cooling equipment for aluminum alloy die casting as described in claim 1, characterized in that: The valve component (23) includes: a valve stem (231) that slides within the groove (22); a valve hole (232) that is opened on the valve stem (231) and cooperates with the channel (21); and a spline rod (233) that slides through the fixed mold (11) and extends one end into the groove (22) and is fixed to the surface of the valve stem (231).

3. The auxiliary cooling equipment for aluminum alloy die casting as described in claim 2, characterized in that: The valve component (23) further includes: a spring (234), which is sleeved on one end of the spline rod (233) and fixed at both ends between the surface of the valve column (231) and the inner wall of the groove (22); and a limiting block (235), which is fixed at one end of the spline rod (233) located outside the fixed mold (11).

4. The auxiliary cooling device for aluminum alloy die casting as described in any one of claims 1, 2, and 3, characterized in that: The groove (22) includes a threaded groove (221) formed thereon, and the plug (26) is threadedly connected to the threaded groove (221).

5. The auxiliary cooling equipment for aluminum alloy die casting as described in claim 4, characterized in that: The mold insert (25) includes: a rod (251), one end of which is inserted into the groove (22); a cover (252), which is fixedly connected to one end of the rod (251) located in the cavity of the fixed mold (11); a circular groove (253), which is opened in the rod (251) and the cover (252); and a flow channel (254), which is opened in a circumferential array on the rod (251) and cooperates with the circular groove (253) and the connecting piece (24) respectively.

6. The auxiliary cooling device for aluminum alloy die casting as described in claim 5, characterized in that: The mold insert (25) also includes a threaded portion (255) at one end of the rod (251) away from the cover (252), and the threaded portion (255) is threadedly connected to the threaded groove portion (221). One end of the rod (251) is provided with a circumferential array of locking holes (256), and one end of the rod (251) is provided with a chamfered portion. Both the locking holes (256) and the chamfered portion are engaged with the connecting piece (24).

7. The auxiliary cooling device for aluminum alloy die casting as described in claim 6, characterized in that: The connecting component (24) includes: a connecting post (241), one end of which is inserted into the groove (22) and abuts against the valve post (231), and the other end of which is inserted into one end of the rod (251); flow holes (242), which are arranged in a circumferential array on the connecting post (241) and respectively cooperate with the channel (21) and the flow channel (254); mounting grooves (243), which are arranged in a circumferential array on one end of the connecting post (241); a number of locking blocks (244), which slide in the corresponding mounting grooves (243) and cooperate with the locking holes (256); and springs (245), which are arranged in a circumferential array and fixed between the inner wall of the mounting groove (243) and the surface of the locking blocks (244).

8. The auxiliary cooling device for aluminum alloy die casting as described in claim 7, characterized in that: The connecting member (24) further includes: unlocking plates (246), which are several in number and slide in the corresponding mounting slots (243); unlocking holes (247), which are opened on the locking block (244) and cooperate with one end of the unlocking plate (246); short columns (248), which slide in a circular array on the connecting column (241) and are fixed to the surface of the unlocking plate (246); springs (249), which are distributed in a circular array and are fixed between the surface of the connecting column (241) and the surface of the short columns (248); and ring (2410), which slides on the surface of the connecting column (241) and cooperates with the short columns (248).

9. The auxiliary cooling device for aluminum alloy die casting as described in any one of claims 1, 2, 3, 5, 6, 7, and 8, characterized in that: The die-casting mold mechanism (1) further includes: an ejector assembly (13) installed on the fixed mold (11); a base (14) fixed on the fixed mold (11); and a moving plate (15) fixed on the moving mold (12).

10. The auxiliary cooling device for aluminum alloy die casting as described in claim 9, characterized in that: The auxiliary cooling mechanism (2) further includes: a water inlet pipe (27), fixed on one side of the fixed mold (11) and connected to channel one (21); a water outlet pipe (28), fixed on the other side of the fixed mold (11) and connected to channel one (21); channel two (29), which is arranged in a linear array inside the moving mold (12); a water inlet pipe two (210), fixed on one side of the moving mold (12) and connected to channel one (21); and a water outlet pipe two (211), fixed on the other side of the moving mold (12) and connected to channel one (21).

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