Die-casting die for valve cover machining

Abstract

The die-casting die for valve deck machining comprises a fixed die with a die cavity, a movable die with a feeding pipe, a guiding system and a cooling system, and the cooling system comprises a cooling ring cavity which is arranged in the fixed die and surrounds the die cavity; the spraying ring shell is rotationally mounted on the outer peripheral wall of the cooling ring cavity through a driving device, a guide mechanism is arranged between the outer peripheral wall and the cooling ring cavity, and a plurality of spraying holes are formed in the inner peripheral wall at intervals; in daily use, by the adoption of the technical scheme, the water diversion device supplies external cooling water into the spraying ring shell and sprays the external cooling water to the peripheral wall of the inner side of the cooling ring cavity from all the spraying holes, meanwhile, the driving device acts to drive the spraying ring shell to rotate in the circumferential direction and ascend and descend in a reciprocating mode at the same time, and therefore the cooling effect is achieved. And multiple cooling water flows can be sprayed on the peripheral wall of the inner side of the cooling ring cavity in a three-dimensional manner, so that the cooling efficiency of the fixed mold is improved.

Description

Technical Field

[0001] The present invention relates to the field of valve cover die-casting, and particularly to a die-casting mold for valve cover processing. Background Art

[0002] A valve cover die-casting mold is a special mold for die-casting parts such as valve covers. Die-casting is a molding method in which liquid or semi-liquid metal is rapidly injected into the cavity of a die-casting mold under high pressure, and after pressure holding and cooling and solidification, a casting is obtained.

[0003] Die-casting molds generally include a fixed mold part, a movable mold part, a guiding mechanism and a cooling system. For example, in a Chinese invention patent with the publication number CN116511461B for a die-casting mold for an aluminum alloy housing of a monitoring camera, a mold body is formed by the cooperation between a mold body and a pressing plate. The mold body is pushed downward by a telescopic rod, and the feeding assembly is extruded to enable the material inside the feeding assembly to enter the mold body, thereby realizing the molding of the aluminum alloy housing of the monitoring camera. In order to carry out normal die-casting production, the mold temperature must be maintained basically constant. Most of the existing cooling systems are water-cooled, with pipelines opened in the mold to allow cooling water to flow through the pipelines to cool the mold. However, the higher the cooling water flows towards the outlet end of the pipeline, the higher the temperature. The existing defects are as follows: 1. The mold cannot be evenly cooled, and the cooling effect is not good; 2. Various substances in the cooling water will gradually accumulate in the cooling pipeline during the long-term circulation process, affecting the cooling effect of the cooling water on the mold. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art.

[0005] The present application provides a die-casting mold for valve cover processing, including a fixed mold with a mold cavity, a movable mold with a feeding pipe, a guiding system and a cooling system. The cooling system includes: A cooling ring cavity, which is arranged in the fixed mold and surrounds the mold cavity; A spraying ring shell, which is rotatably installed on the outer peripheral wall of the cooling ring cavity through a driving device. A guiding mechanism is arranged between the outer peripheral wall and the cooling ring cavity, and a plurality of spraying holes are arranged at intervals on the inner peripheral wall; A water guiding device, which is used to connect the inner cavity of the spraying ring shell with an external water supply system.

[0006] The water guiding device includes: A bottom ring, which is rotatably installed at the bottom of the spraying ring shell; A fixed pipe, which is fixedly arranged at the bottom of the cooling ring cavity, and the lower end is connected to an external water supply system; A floating pipe, which is installed in the fixed pipe in a lifting and sliding manner, the upper end is fixedly connected to the bottom ring, and the inner cavity is communicated with the inner cavity of the spraying ring shell; The spring is sleeved on the outside of the fixed tube, and the upper end and the lower end of the spring are respectively pressed against the bottom surface of the bottom ring and the top surface of the fixed tube.

[0007] The guiding agencies include: A wave annular groove is disposed around the outer peripheral wall of the cooling annular cavity; A plurality of sliding blocks are fixedly arranged at intervals on the outer peripheral wall of the spray ring shell and are all slidably matched with the wave ring groove.

[0008] The diameter of one end of the spray hole away from the inner cavity of the spray ring shell is smaller than that of the other end.

[0009] The cooling system also includes: An external thread is provided on the inner peripheral wall of the cooling ring cavity; A lifting sleeve is sleeved on the inner peripheral wall of the cooling ring cavity, and the inner peripheral wall is provided with an internal thread engaged with the external thread; Wherein, the driving device can drive the lifting sleeve to rotate.

[0010] The drive unit includes: An inner gear column is rotatably mounted in the cooling ring cavity and is transmission-connected to the lifting sleeve via an inner gear ring; The outer gear column is rotatably mounted in the cooling ring cavity and is drivingly connected to the spray ring shell through the outer gear ring; A driving gear, which is used to mesh with the inner gear column or the outer gear column and is driven to rotate by the motor; The switching mechanism is used to control the movement of the driving gear so that it meshes with the inner gear column or the outer gear column for transmission.

[0011] The switching mechanism includes: An arc groove is arranged at the bottom of the cooling ring cavity and is located between the inner tooth column and the outer tooth column; The swing arm, the motor is fixed at one end of the swing arm, and the other end is rotatably connected to the bottom surface of the fixed mold through a rotating shaft concentric with the arc groove; A push-swing mechanism, used for pushing the swing arm to rotate around the rotating shaft; The output shaft of the motor movably passes through the arc groove and extends into the cooling ring cavity, and is fixedly connected with the driving gear.

[0012] The push-swing mechanism includes: A pair of fixed frames, fixed on the bottom surface of the fixed mold; A push rod, which is pushed by an adjustment cylinder and slidably mounted on a pair of fixed frames; A notch is provided on the top surface of the push rod, and the bottom surface thereof slides and rubs with the bottom surface of the swing arm; A guide groove, which is arranged in the middle of the swing arm; The guide block is fixedly arranged in the middle of the bottom surface of the notch and is slidably matched with the guide groove.

[0013] There are several floating pipes and fixed pipes. Each floating pipe is fixedly arranged at the bottom of the bottom ring at circumferential intervals, and a spring is sleeved on the outside of each. Each fixed pipe is distributed at circumferential intervals along the bottom of the cooling ring cavity. The lower end of each floating pipe is slidably inserted into the corresponding fixed pipe. The lower end of each spring abuts against the upper end of the corresponding fixed pipe, and the upper end presses on the bottom ring, so that the bottom ring is kept sealed with the bottom of the spray ring shell.

[0014] At the same time, an operation method for a die-casting mold for valve cover processing is disclosed, including the following steps: S1. Operate the switching mechanism to make the driving gear mesh with the external tooth column; S2. Start the external water supply system to supply cooling water into the spray ring shell through the water diversion device, and the cooling water can be sprayed onto the external thread on the inner circumferential wall of the cooling ring cavity through each spray hole; S3. The motor rotates, the driving gear, the external tooth ring and the spray ring shell rotate, and at the same time the spray ring shell rises and falls in the cooling ring cavity to perform three-dimensional spraying on the inner circumferential wall of the cooling ring cavity; S4. Stop the motor and the external water supply system, and operate the switching system to make the driving gear mesh with the internal tooth column; S5. Start the motor, the driving gear and the lifting sleeve rotate, the internal thread and the external thread are in transmission cooperation, and the lifting sleeve rises; S6. The motor rotates in reverse, the driving gear and the lifting sleeve rotate in reverse, the internal thread and the external thread are in transmission cooperation, and the lifting sleeve descends.

[0015] The beneficial effects of the present invention are as follows: 1. Through the settings of the cooling ring cavity, the spray ring shell, the driving device, several spray holes, the bottom ring, the fixed pipes, the floating pipes, the springs, the wave ring grooves and several sliders, the cooling water flow is evenly distributed on the inner circumferential wall of the cooling ring cavity in a three-dimensional spraying manner, improving the cooling effect; 2. Through the settings of the external thread, the lifting sleeve, the internal thread and the driving device, it is convenient to clean the substances attached to the inner circumferential wall of the cooling ring cavity, so that the cooling water can directly contact the external thread and the inner circumferential wall of the cooling ring cavity, enabling the cooling system to perform self-cleaning and still maintaining a good cooling effect without maintenance for a long time. Description of the Drawings

[0016] Figure 1 Is a three-dimensional view (complete) of a die-casting mold for valve cover processing in an embodiment of the present application; Figure 2 Is a three-dimensional view (the fixed mold is cut open at the front side) of a die-casting mold for valve cover processing in an embodiment of the present application; Figure 3 Is a three-dimensional view of the driving device in an embodiment of the present application; Figure 4 Is a three-dimensional view from the bottom-up direction with the fixed mold cut open in the middle in an embodiment of the present application; Figure 5Stereogram of the cooperation between the spray ring shell and the bottom ring in the embodiment of the present application; Figure 6 is Figure 5 Schematic diagram of the partial enlarged structure at position A in

[0017] Reference numerals 1 - Mold cavity, 2 - Fixed mold, 3 - Feed pipe, 4 - Moving mold, 5 - Guiding system, 6 - Cooling system, 61 - Cooling ring cavity, 62 - Spray ring shell, 63 - Spray holes, 64 - Water diversion device, 641 - Bottom ring, 642 - Fixed pipe, 643 - Floating pipe, 644 - Spring, 65 - External thread, 66 - Lifting sleeve, 67 - Internal thread, 7 - Guiding mechanism, 71 - Wavy ring groove, 72 - Slide block, 8 - Driving device, 81 - Internal tooth column, 82 - Internal tooth ring, 83 - External tooth column, 84 - External tooth ring, 85 - Driving gear, 86 - Motor, 9 - Switching mechanism, 91 - Arc groove, 92 - Swing arm, 93 - Push - swing mechanism, 931 - Fixed frame, 932 - Pushing rod, 933 - Missing groove, 934 - Guide groove, 935 - Guide block. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0019] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0020] Next, a die - casting mold for valve cover processing provided by the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0021] Embodiment 1: As Figures 1 to 6As shown in the figure, an embodiment of the present application provides a die-casting mold for valve cover processing, including a stationary mold 2 with a mold cavity 1, a moving mold 4 with a feed pipe 3, a guiding system 5, and a cooling system 6. The cooling system 6 includes a cooling ring cavity 61, which is arranged in the stationary mold 2 and surrounds the mold cavity 1; a spray ring shell 62, which is rotatably installed on the outer peripheral wall of the cooling ring cavity 61 through a driving device 8, and a guiding mechanism 7 is arranged between the outer peripheral wall and the cooling ring cavity 61, and a plurality of spray holes 63 are arranged at intervals on the inner peripheral wall; a water guiding device 64, which is used to connect the inner cavity of the spray ring shell 62 with an external water supply system.

[0022] Further, the water guiding device 64 includes a bottom ring 641, which is rotatably installed at the bottom of the spray ring shell 62; a fixed pipe 642, which is fixedly arranged at the bottom of the cooling ring cavity 61, and the lower end is connected to an external water supply system; a floating pipe 643, which is installed in the fixed pipe 642 in a lifting and sliding manner, and the upper end is fixedly connected to the bottom ring 641, and the inner cavity is communicated with the inner cavity of the spray ring shell 62; a spring 644, which is sleeved on the outside of the fixed pipe 642, and the upper end and the lower end are respectively abutted against the bottom surface of the bottom ring 641 and the top surface of the fixed pipe 642.

[0023] Further, there are a plurality of floating pipes 643 and fixed pipes 642. Each floating pipe 643 is fixedly arranged at the bottom of the bottom ring 641 at intervals along the circumferential direction, and a spring 644 is sleeved on the outside of each. Each fixed pipe 642 is distributed at intervals along the circumferential direction of the bottom of the cooling ring cavity 61. The lower end of each floating pipe 643 is slidably inserted into the corresponding fixed pipe 642. The lower end of each spring 644 abuts against the upper end of the corresponding fixed pipe 642, and the upper end presses the bottom ring 641 to keep the bottom ring 641 sealed with the bottom of the spray ring shell 62.

[0024] Further, a raised portion is provided at the top of the bottom ring 641. The raised portion extends into the inner cavity of the spray ring shell 62, and both sides are hermetically fitted with the inner wall of the spray ring shell 62 through a sealing ring.

[0025] Further, the guiding mechanism 7 includes a wave ring groove 71, which is arranged around the outer peripheral wall of the cooling ring cavity 61; a plurality of sliders 72, which are fixedly arranged at intervals on the outer peripheral wall of the spray ring shell 62 and are all slidably matched with the wave ring groove 71.

[0026] Preferably, the diameter of one end of the spray hole 63 away from the inner cavity of the spray ring shell 62 is smaller than that of the other end.

[0027] Further, the guiding system 5 includes a top plate 51, which is fixedly arranged on the top of the stationary mold 2 through a pair of guiding vertical rods 52; a pair of sliding holes 53, which are used to slidably install the moving mold 4 between the pair of guiding vertical rods 52; a pair of lifting cylinders 54, which are fixedly arranged on the top of the top plate 51, and the pistons all pass through the top plate 51 and are fixedly connected to the top of the moving mold 4.

[0028] In this embodiment of the present application, due to the adoption of the above-mentioned structure, the external water supply system supplies coolant into the fixed pipe 642, the coolant flows through the floating pipe 643 and the inner cavity of the spray ring shell 62, and is sprayed from each spray hole 63 to the inner circumferential wall of the cooling ring cavity 61. The driving device 8 simultaneously drives the spray ring shell 62 to rotate, and each slider 72 slides in the corresponding wave ring groove 71, so that the spray ring shell 62 reciprocates and rises and falls while rotating. The spring 644 always provides an upward thrust to the bottom ring 641, so that the bottom ring 641 maintains a seal with the bottom of the spray ring shell 62. The relative position of the floating pipe 643 and the spray ring shell 62 changes with the rotation of the spray ring shell 62, so that the temperature of each place in the spray ring shell 62 is the same, the temperature difference of the cooling water sprayed from each spray port is small, and the cooling of the inner circumferential wall of the cooling ring cavity 61 is uniform.

[0029] The preload force of the spring 644 is transmitted to the bottom ring 641 through the floating tube 643, causing it to produce axial displacement and form a linear sealing contact with the bottom of the spray ring shell 62; when the system pressure fluctuation causes the bottom ring 641 to produce radial displacement, each spring 644 maintains a balanced normal compression force through adaptive compression deformation. At the same time, the sliding matching structure of the floating tube 643 and the fixed tube 642 ensures that the sealing surface always maintains coaxiality and cooperates with the sealing ring, thereby achieving a continuous and reliable sealing effect under dynamic conditions.

[0030] Embodiment 2: like Figures 1 to 6 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the cooling system 6 also includes: An external thread 65, which is provided on the inner peripheral wall of the cooling ring cavity 61; The lifting sleeve 66 is sleeved on the inner peripheral wall of the cooling ring cavity 61 , and the inner peripheral wall is provided with an internal thread 67 engaged with the external thread 65 . The driving device 8 can drive the lifting sleeve 66 to rotate.

[0031] Furthermore, the driving device 8 includes an inner gear column 81, which is rotatably installed in the cooling ring cavity 61 and is connected to the lifting sleeve 66 through the inner gear ring 82; an outer gear column 83, which is rotatably installed in the cooling ring cavity 61 and is connected to the spray ring shell 62 through the outer gear ring 84; a driving gear 85, which is used to engage with the inner gear column 81 or the outer gear column 83 and is driven to rotate by the motor 86; a switching mechanism 9, which is used to control the movement of the driving gear 85 so that it engages with the inner gear column 81 or the outer gear column 83 for transmission.

[0032] Also disclosed is an operating method for a die-casting mold for valve cover processing, comprising the following steps: S1, operate the switching mechanism 9 to make the driving gear 85 mesh with the outer tooth column 83; S2. Start the external water supply system to supply cooling water into the spray ring housing 62 through the water diversion device 64, so that the cooling water can be sprayed onto the external thread 65 on the inner circumferential wall of the cooling ring cavity 61 through each spray hole 63; S3. Rotate the motor 86, and the driving gear 85, the external tooth ring 84 and the spray ring housing 62 rotate. At the same time, the spray ring housing 62 moves up and down in the cooling ring cavity 61 to perform three-dimensional spraying on the inner circumferential wall of the cooling ring cavity 61; S4. Stop the motor 86 and the external water supply system, and operate the switching system to make the driving gear 85 engage with the internal tooth column 81; S5. Start the motor 86, and the driving gear 85 and the lifting sleeve 66 rotate. The internal thread 67 is in transmission cooperation with the external thread 65, and the lifting sleeve 66 rises; S6. Reverse the motor 86, and the driving gear 85 and the lifting sleeve 66 reverse. The internal thread 67 is in transmission cooperation with the external thread 65, and the lifting sleeve 66 descends.

[0033] In this embodiment of the present application, due to the adoption of the above structure, when it is necessary to clean the inner circumferential wall of the cooling ring cavity 61, the switching mechanism 9 controls the driving gear 85 to engage with the internal tooth column 81 for transmission. The driving gear 85 is driven by the motor 86 to drive the internal tooth column 81 to rotate, and then drives the lifting sleeve 66 to rotate. The internal thread 67 cooperates with the external thread 65 to make the lifting sleeve 66 move up and down on the inner circumferential wall of the cooling ring cavity 61, scraping off the impurities attached to the external thread 65. Then the motor 86 reverses to make the lifting sleeve 66 descend, and the switching mechanism 9 controls the driving gear 85 to separate from the internal tooth column 81 and instead engage with the external tooth column 83 for transmission. The driving gear 85 is driven by the motor 86 to drive the external tooth column 83 to rotate, and then drives the spray ring housing 62 to rotate and move up and down at the same time. The external water supply system operates, so that the cooling water is sprayed out from each spray hole 63 to wash the external thread 65. The cooling water in the cooling ring cavity 61 converges to the bottom and is discharged from the arc-shaped groove 91.

[0034] Embodiment 3: As Figures 1 to 6 shown, in this embodiment, in addition to including the structural features of the foregoing embodiment, the switching mechanism 9 includes an arc-shaped groove 91, which is arranged at the bottom of the cooling ring cavity 61 and is located between the internal tooth column 81 and the external tooth column 83; a swing arm 92, with the motor 86 fixedly arranged at one end, and the other end is rotatably connected to the bottom surface of the fixed mold 2 through a rotating shaft concentric with the arc-shaped groove 91; a push-swing mechanism 93 for pushing the swing arm 92 to rotate around the rotating shaft. The output shaft of the motor 86 passes through the arc-shaped groove 91 and extends into the cooling ring cavity 61 and is fixedly connected to the driving gear 85.

[0035] Further, the pushing and swinging mechanism 93 includes a pair of fixed frames 931 fixedly arranged on the bottom surface of the fixed mold 2; a pushing rod 932 which is pushed by an adjusting cylinder and is slidably installed in the pair of fixed frames 931; a notch 933 arranged on the top surface of the pushing rod 932, and the bottom surface of which has a sliding friction with the bottom surface of the swing arm 92; a guide groove 934 arranged in the middle of the swing arm 92; and a guide block 935 fixedly arranged in the middle of the bottom surface of the notch 933 and slidably matched with the guide groove 934.

[0036] In this embodiment of the present application, due to the adoption of the above structure, when it is necessary to adjust the meshing of the driving gear 85 with the inner tooth column 81 or the outer tooth column 83, the adjusting cylinder acts to push the pushing rod 932 to slide in the pair of fixed frames 931. While the guide block 935 slides in the guide groove 934, it pushes the swing arm 92 to rotate around the rotating shaft, and the driving gear 85 at the other end can be disengaged from the meshing of the inner tooth column 81 and the outer tooth column 83 or disengaged from the meshing of the outer tooth column 83 and the inner tooth column 81, so as to control the independent operation of each function of the cooling system 6.

[0037] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0038] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A die-casting mold for valve cover processing, comprising a fixed mold (2) with a mold cavity (1), a movable mold (4) with a feed pipe (3), a guiding system (5) and a cooling system (6), characterized in that, The cooling system (6) comprises: A cooling annular cavity (61) is arranged in the fixed mold (2) and surrounds the mold cavity (1); A spray ring shell (62) is rotatably mounted on the outer peripheral wall of the cooling ring cavity (61) via a driving device (8), a guide mechanism (7) is provided between the outer peripheral wall and the cooling ring cavity (61), and a plurality of spray holes (63) are provided at intervals on the inner peripheral wall; A water diversion device (64) is used to connect the inner cavity of the spray ring shell (62) with an external water supply system.

2. The die-casting mold for valve cover processing according to claim 1, characterized in that, The water diversion device (64) comprises: A bottom ring (641) rotatably mounted on the bottom of the spray ring housing (62); A fixed pipe (642) fixedly arranged at the bottom of the cooling ring cavity (61), with a lower end connected to an external water supply system; A floating pipe (643) is installed in the fixed pipe (642) in a lifting and sliding manner, with its upper end fixedly connected to the bottom ring (641) and its inner cavity communicating with the inner cavity of the spray ring shell (62); The spring (644) is sleeved on the outside of the fixed tube (642), and the upper end and the lower end are respectively pressed against the bottom surface of the bottom ring (641) and the top surface of the fixed tube (642).

3. The die-casting mold for valve cover processing according to claim 1, characterized in that, The guiding mechanism (7) comprises: A wave annular groove (71) arranged around the outer peripheral wall of the cooling annular cavity (61); A plurality of sliding blocks (72) are fixedly arranged at intervals on the outer peripheral wall of the spray ring shell (62), and are all slidably matched with the wave ring groove (71).

4. The die-casting mold for valve cover processing according to claim 1, characterized in that: The diameter of one end of the spray hole (63) away from the inner cavity of the spray ring shell (62) is smaller than that of the other end.

5. A die-casting mold for valve cover processing according to claim 1, wherein, The cooling system (6) further comprises: An external thread (65) disposed on an inner peripheral wall of the cooling ring cavity (61); A lifting sleeve (66) sleeved on the inner peripheral wall of the cooling ring cavity (61), the inner peripheral wall being provided with an inner thread (67) meshing with the outer thread (65); The driving device (8) can drive the lifting sleeve (66) to rotate.

6. The die-casting mold for valve cover processing according to claim 5, wherein, The driving device (8) comprises: An internal gear column (81) is rotatably mounted in the cooling ring cavity (61) and is transmission-connected to the lifting sleeve (66) via an internal gear ring (82); An external tooth column (83) is rotatably mounted in the cooling ring cavity (61) and is transmission-connected to the spray ring housing (62) via an external tooth ring (84); A driving gear (85), which is used to mesh with the inner tooth column (81) or the outer tooth column (83) and is driven to rotate by a motor (86); A switching mechanism (9) is used to control the movement of the driving gear (85) so that it meshes with the inner tooth column (81) or the outer tooth column (83) for transmission.

7. A die-casting mold for valve cover processing according to claim 6, characterized in that, The switching mechanism (9) comprises: An arc groove (91) arranged at the bottom of the cooling ring cavity (61) and located between the inner tooth column (81) and the outer tooth column (83); A swing arm (92), the motor (86) being fixedly mounted at one end thereof, and the other end being rotatably connected to the bottom surface of the fixed mold (2) via a rotating shaft concentric with the arc groove (91); A push-swing mechanism (93), used for pushing the swing arm (92) to rotate around the rotation axis; Wherein, the output shaft of the motor (86) movably passes through the arc-shaped groove (91) and extends into the cooling ring cavity (61), and is fixedly connected to the driving gear (85).

8. A die-casting mold for valve cover processing according to claim 7, wherein, The push-swing mechanism (93) includes: A pair of fixed frames (931), fixedly arranged on the bottom surface of the fixed mold (2); A push rod (932), which is pushed by an adjustment cylinder and is slidably installed in the pair of fixed frames (931); A notch (933), which is arranged on the top surface of the push rod (932), and the bottom surface thereof is in sliding friction with the bottom surface of the swing arm (92); A guide groove (934), which is arranged in the middle of the swing arm (92); A guide block (935), which is fixedly arranged in the middle of the bottom surface of the notch (933) and is in sliding fit with the guide groove (934).

9. The die-casting mold for valve cover processing according to claim 2, wherein, There are several floating pipes (643) and fixed pipes (642). Each floating pipe (643) is fixedly arranged at the bottom of the bottom ring (641) at circumferential intervals, and a spring (644) is sleeved on the outside of each. Each fixed pipe (642) is distributed at circumferential intervals along the bottom of the cooling ring cavity (61). The lower end of each floating pipe (643) is slidably inserted into the corresponding fixed pipe (642). The lower end of each spring (644) abuts against the upper end of the corresponding fixed pipe (642), and the upper end presses on the bottom ring (641), so that the bottom ring (641) is kept sealed with the bottom of the spray ring shell (62).

10. An operating method of a die-casting mold for valve cover processing according to claim 6, characterized in that, It includes the following steps: S1. Operate the switching mechanism (9) to make the driving gear (85) engage with the external tooth column (83); S2. Start the external water supply system to supply cooling water into the spray ring shell (62) through the water diversion device (64), and the cooling water can be sprayed onto the external thread (65) on the inner circumferential wall of the cooling ring cavity (61) through each spray hole (63); S3. The motor (86) rotates, the driving gear (85), the external tooth ring (84) and the spray ring shell (62) rotate, and at the same time the spray ring shell (62) rises and falls in the cooling ring cavity (61) to perform three-dimensional spraying on the inner circumferential wall of the cooling ring cavity (61); S4. Stop the motor (86) and the external water supply system, and operate the switching system to make the driving gear (85) engage with the internal tooth column (81); S5. Start the motor (86), the driving gear (85) and the lifting sleeve (66) rotate, the internal thread (67) is in transmission cooperation with the external thread (65), and the lifting sleeve (66) rises; S6. The motor (86) rotates in reverse, the driving gear (85) and the lifting sleeve (66) rotate in reverse, the internal thread (67) is in transmission cooperation with the external thread (65), and the lifting sleeve (66) descends.

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