Die casting device for valve plate blank production

Abstract

The die-casting device for valve plate blank production comprises a base, the surface of the base is connected with a die closing mechanism, the die closing mechanism is in transmission connection with a hydraulic cylinder, the output end of the hydraulic cylinder is in transmission connection with a first pressing die, the output end of the hydraulic cylinder is in sliding connection with a second pressing die, and the second pressing die is fixedly connected with the base. A die-casting die is arranged between the first pressing die and the second pressing die; the die-casting die comprises a movable die plate and a static die plate, one side of the movable die plate is connected with one side of a first cooling plate, the other side of the first cooling plate is connected with a first pressing die, the other side of the movable die plate is connected with one side of a second cooling plate, and the second pressing die is connected with a base. The stable temperature gradient can be formed for uniform heat dissipation, the forming quality and stability of a valve plate casting are ensured, and the problem that when mold filling is supersaturated, the injection amount of a metal solution exceeds the volume of a mold cavity, and the excessive solution directly flows into an exhaust groove or an overflow groove is solved.

Description

Technical Field

[0001] The invention relates to the technical field of distribution plates, in particular to a die-casting device for producing distribution plate blanks. Background Art

[0002] The patent application with application publication number CN202410445893.4 discloses a mold switching system for die-casting of a distribution plate and its distribution plate assembly, including a mounting base, an injection unit and a clamping unit mounted on the top of the mounting base, and a runner unit opened on the clamping unit, wherein the clamping unit includes a symmetrically arranged fixed die seat and a movable die seat, wherein two sets of fixed die runners are symmetrically opened inside the fixed die seat, and two sets of movable die runners are symmetrically opened inside the movable die seat. The device solves the problem that the front pump distribution plate and the rear pump distribution plate of the same hydraulic pump need to be processed by two different die-casting devices, and the same die-casting device cannot complete the die-casting processing of the travel motor distribution plate, and achieves the selective adjustment of the number and position of the transition throttling grooves, and uses a set of molds to complete the die-casting processing of the front pump and rear pump distribution plates at the same time, and can also be further adjusted and processed according to the processing requirements of the travel motor, and the material is easy to take out after cooling.

[0003] In the prior art including the above-mentioned patents, the existing cooling methods and demolding technologies have some limitations. The first is uneven cooling. Traditional die-casting cooling is usually carried out through the external cooling system of the mold (such as a water cooling channel), which causes the cooling process to be carried out from the outside to the inside. This cooling method easily causes the internal cooling speed of the casting to be slow, while the external cooling speed is fast, resulting in greater thermal stress inside the casting, and even defects such as shrinkage cavities and shrinkage. In addition, due to uneven cooling or improper surface treatment of the mold, the casting may be stuck on the mold after cooling, resulting in slow demolding efficiency; when the mold is oversaturated, the amount of metal solution injected exceeds the cavity volume, and the excess solution will directly flow into the exhaust groove or overflow groove, especially in the high-speed filling stage, it is easy to break through the exhaust structure, resulting in poor control of this situation.

[0004] Therefore, a die-casting device for producing a distribution plate blank is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a die-casting device for producing a distribution plate blank to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a die-casting device for producing a distribution plate blank, comprising a base, the surface of the base is connected to a clamping mechanism, the clamping mechanism is transmission-connected to a hydraulic cylinder, the output end of the hydraulic cylinder is transmission-connected to a first die, the output end of the hydraulic cylinder is slidably connected to a second die, the second die is fixedly connected to the base, and a die-casting die is arranged between the first die and the second die; The die-casting mold includes a moving template and a stationary template. One side of the moving template is connected to one side of the first cooling plate. The other side of the first cooling plate is connected to the first die. The other side of the moving template is connected to one side of the second cooling plate. The other side of the second cooling plate is connected to the second die. The second die is connected to the base.

[0007] Further, liquid inlets are provided at the middle positions of both the first cooling plate and the second cooling plate. The liquid inlets are communicated with the cooling mechanism. Along the radial direction from the inside to the outside, multiple groups of concentric annular grooves with increasing diameters are successively provided on the first cooling plate and the second cooling plate. Rectangular openings are provided at equal intervals on the inner wall of the annular groove, and the rectangular openings are arranged staggeredly.

[0008] Further, a plurality of cooling holes are annularly provided on the stationary template and the moving template. The cooling holes are communicated with the cooling ring grooves. Liquid injection grooves are provided at the lower ends of the stationary template and the moving template. The two liquid injection grooves are communicated with the injection mechanism. The injection mechanism is connected to the base. A plurality of drain ports are equidistantly provided on the outer ring of the stationary template. The plurality of drain ports are communicated with the cooling mechanism. The cooling mechanism is connected to the base. The top of the mold cavity between the stationary template and the moving template is communicated with the anti-overflow device.

[0009] Further, the anti-overflow device includes a sleeve. The sleeve is slidably connected to the moving template. One end of the sleeve is communicated with one end of the exhaust pipe. The other end of the exhaust pipe is communicated with the top of the mold cavity. The inner ring of the sleeve is slidably connected to the piston. One side of the piston away from the exhaust pipe is connected to the output end of the reset hydraulic rod. The reset hydraulic rod is in transmission connection with the mold closing mechanism.

[0010] Further, a threaded hole is provided on the side of the sleeve away from the piston. The threaded hole is threadedly connected to the metering screw rod. One end of the metering screw rod close to the piston is connected to the travel switch.

[0011] Further, both sides of the die-casting mold are slidably connected to symmetrically arranged unloading disc clamping rods. One end of the unloading disc clamping rod passes through the moving template and the stationary template and is clamped to the distribution disc in the mold cavity. The other end of the unloading disc clamping rod passes through the first die at one end and contacts the assisting ejection block. The assisting ejection block is connected to the base.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The die-casting device for producing the distribution disc blank is reasonable and has the following advantages: (1)Cooling liquid enters through the liquid inlet and is transmitted from the inside to the outside along the cooling ring groove and the rectangular opening, enabling the cooling liquid to diffuse uniformly from the inside to the outside, cooling the flow distribution plate in the mold cavity between the moving template and the stationary template, thereby achieving efficient and uniform cooling of the mold, improving the heat dissipation efficiency, reducing thermal deformation, and ensuring stable casting forming quality. Moreover, cooling from the inside to the outside can preferentially reduce the temperature in the core area of the mold, and then dissipate heat uniformly along the progressive path of the cooling ring groove and the rectangular opening, synchronizing the metal solidification process, reducing the temperature gradient, synchronizing with the physical process of the molten metal solidifying from the inside to the outside, and reducing the risk of stress concentration and thermal cracks caused by excessive temperature difference between the inside and the outside; through the connected design of the cooling holes and the cooling ring groove, after the cooling liquid diffuses uniformly from the inside to the outside, it first efficiently cools the core area of the mold, and then gradually cools the outer ring of the flow distribution plate along the path. And the cooling liquid absorbs the heat of the mold and its temperature rises, while the outer ring of the flow distribution plate gradually decreases in temperature due to continuous heat dissipation, forming a stable temperature gradient for uniform heat dissipation, ensuring the quality and stability of the casting forming of the flow distribution plate, and finally realizing the reflux through the drain port.

[0013] (2)During the die-casting process, the injection mechanism injects the molten metal alloy into the lower end of the mold cavity between the moving template and the stationary template. The gas sleeve in the mold cavity immediately pushes the piston to move, ensuring smooth filling of the mold cavity through precise displacement control. When the mold cavity is completely filled, the piston just touches the travel switch. At this time, the injection mechanism immediately stops operating and enters the pressure-holding stage, and then subsequent cooling work is carried out to avoid overflowing of the excess molten metal alloy. Moreover, by adjusting the position of the control screw, the injection amount of the molten metal alloy for different-sized flow distribution plates can be further adjusted, thereby further improving the fault tolerance; after the flow distribution plate is cooled and formed in the mold cavity, the moving template drives the unloading disk rod to move synchronously. When the rod contacts the ejection assisting block, mechanical linkage is generated, enabling the flow distribution plate to be quickly separated from the mold cavity, achieving rapid demolding, and reserving sufficient time for the next production cycle. Brief Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the ejection assisting block in the present invention; Figure 3 It is a schematic diagram of the structure of the die-casting mold in the present invention; Figure 4 It is a schematic diagram of the structure of the cooling holes in the present invention; Figure 5 It is a schematic diagram of the structure of the second cooling plate in the present invention; Figure 6 It is a schematic diagram of the structure of the drain port in the present invention; Figure 7 It is a schematic diagram of the structure of the unloading disk rod in the present invention; Figure 8 It is a schematic diagram of the structure of the moving template and the stationary template in the present invention; Figure 9 It is a schematic diagram of the structure of the overflow prevention device in the present invention.

[0015] In the figure: 1- clamping mechanism, 11- auxiliary stripping block, 12- base, 2- hydraulic cylinder, 3- first die, 4- second die, 5- cooling mechanism, 6- injection mechanism, 7- die casting mold, 71- moving die plate, 72- static die plate, 721- cooling hole, 722- injection groove, 81- first cooling plate, 82- second cooling plate, 821- cooling ring groove, 822- rectangular mouth, 823- liquid inlet, 824- discharge port, 9- overflow prevention device, 91- sleeve, 92- exhaust pipe, 93- piston, 94- reset hydraulic rod, 95- control screw, 96- travel switch, 10- unloading plate clamping rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figures 1-9 , a technical solution provided by the present invention: A die-casting device for producing a distribution plate blank comprises a base 12, the surface of the base 12 is connected to a clamping mechanism 1, the clamping mechanism 1 comprises a hydraulic system, power is provided by hydraulic oil injection and other actions, motion parameters are accurately controlled by a pressure valve and a flow valve, the clamping mechanism 1 is transmission-connected to a hydraulic cylinder 2, the output end of the hydraulic cylinder 2 is transmission-connected to a first die 3, the output end of the hydraulic cylinder 2 is slidably connected to a second die 4, the second die 4 is fixedly connected to the base 12, and a die-casting die 7 is arranged between the first die 3 and the second die 4; The die-casting mold 7 includes a movable mold plate 71 and a static mold plate 72. One side of the movable mold plate 71 is connected to one side of the first cooling plate 81, and the other side of the first cooling plate 81 is connected to the first die 3. The other side of the movable mold plate 71 is connected to one side of the second cooling plate 82, and the other side of the second cooling plate 82 is connected to the second die 4. The second die 4 is connected to the base 12.

[0018] Both the first cooling plate 81 and the second cooling plate 82 are provided with liquid inlets 823 at their middle positions. The liquid inlets 823 are connected to the cooling mechanism 5. The first cooling plate 81 and the second cooling plate 82 are successively provided with multiple groups of concentric annular grooves with increasing diameters from the inside to the outside in the radial direction. The inner walls of the annular grooves are provided with a plurality of rectangular openings 822 arranged at equal intervals, and the rectangular openings 822 are arranged staggeredly. The coolant enters through the liquid inlet 823 and is transmitted along the cooling ring grooves 821 and the rectangular openings 822 from the inside to the outside, so that the coolant diffuses evenly from the inside to the outside, cooling the flow distribution plate in the mold cavity between the moving template 71 and the stationary template 72, thereby realizing efficient and uniform cooling of the mold, improving the heat dissipation efficiency, reducing thermal deformation, and ensuring the stable quality of the casting. Moreover, cooling from the inside to the outside can preferentially reduce the temperature of the core area of the mold, and then dissipate heat evenly along the progressive path of the cooling ring grooves 821 and the rectangular openings 822, synchronize the metal solidification process, reduce the temperature gradient, and synchronize with the physical process of the metal liquid solidifying from the inside to the outside, reducing the risk of stress concentration and thermal cracks caused by excessive internal and external temperature differences.

[0019] The stationary template 72 and the moving template 71 are provided with a plurality of cooling holes 721 in a circular shape. The cooling holes 721 are connected to the cooling ring grooves 821. Liquid injection grooves 722 are provided at the lower ends of the stationary template 72 and the moving template 71. The two liquid injection grooves 722 are connected to the injection mechanism 6. The injection mechanism 6 is connected to the base 12. A plurality of liquid discharge ports 824 are equidistantly provided on the outer circle of the stationary template 72. The plurality of liquid discharge ports 824 are connected to the cooling mechanism 5. The cooling mechanism 5 is connected to the base 12. The top of the mold cavity between the stationary template 72 and the moving template 71 is connected to the anti-overflow device 9. Through the connection design of the cooling holes 721 and the cooling ring grooves 821, after the coolant diffuses evenly from the inside to the outside, it first efficiently cools the core area of the mold (around the cooling holes 721), and then gradually cools the outer circle of the flow distribution plate along the path. Moreover, the temperature of the coolant increases after absorbing the heat of the mold, while the temperature of the outer circle of the flow distribution plate gradually decreases due to continuous heat dissipation, forming a stable temperature gradient for uniform heat dissipation, ensuring the quality and stability of the casting of the flow distribution plate. Finally, the return flow is realized through the liquid discharge ports 824.

[0020] The overflow prevention device 9 includes a sleeve 91, which is slidably connected to the movable mold plate 71, one end of the sleeve 91 is connected to one end of the exhaust pipe 92, the other end of the exhaust pipe 92 is connected to the top of the mold cavity, the inner ring of the sleeve 91 is slidably connected to the piston 93, the side of the piston 93 away from the exhaust pipe 92 is connected to the output end of the reset hydraulic rod 94, the reset hydraulic rod 94 is transmission-connected to the mold clamping mechanism 1, a threaded hole is provided on the side of the sleeve 91 away from the piston 93, the threaded hole is threadedly connected to the control screw 95, and one end of the control screw 95 close to the piston 93 is connected to the travel switch 96. During the die-casting process, the injection mechanism 6 injects the molten metal alloy into the lower end of the mold cavity between the movable mold plate 71 and the static mold plate 72. The gas sleeve 91 in the mold cavity then pushes the piston 93 to move, and the mold cavity is ensured to be filled smoothly through precise displacement control. When the mold cavity is completely filled, the piston 93 just triggers the travel switch 96. At this time, the injection mechanism 6 immediately stops and enters the pressure holding stage, and then performs subsequent cooling work to avoid overflow of excess molten metal alloy. In addition, by adjusting the position of the control screw 95, the injection amount of molten metal alloy of distribution plates of different sizes can be further adjusted, thereby further improving fault tolerance.

[0021] The two sides of the die-casting mold 7 are slidably connected with the symmetrically arranged unloading clamping rods 10. One end of the unloading clamping rod 10 passes through the movable mold plate 71 and the static mold plate 72 to be clamped with the distribution disk in the mold cavity. The other end of the unloading clamping rod 10 passes through the first die 3 at one end and contacts the auxiliary release block 11. The auxiliary release block 11 is connected to the base 12. After the distribution disk is cooled and formed in the mold cavity, the movable mold plate 71 drives the unloading clamping rod 10 to move synchronously. When the clamping rod contacts the auxiliary release block 11, a mechanical linkage is generated, so that the distribution disk is quickly separated from the mold cavity, and rapid demolding is achieved, reserving sufficient time for the next production cycle.

[0022] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A die-casting device for producing a valve plate blank, comprising a base (12), characterized in that: The surface of the base (12) is connected to the mold clamping mechanism (1). The mold clamping mechanism (1) is drivingly connected to the hydraulic cylinder (2). The output end of the hydraulic cylinder (2) is drivingly connected to the first die (3). The output end of the hydraulic cylinder (2) is slidably connected to the second die (4). The second die (4) is fixedly connected to the base (12). A die-casting mold (7) is arranged between the first die (3) and the second die (4). The die-casting mold (7) includes a moving template (71) and a stationary template (72). One side of the moving template (71) is connected to one side of the first cooling plate (81). The other side of the first cooling plate (81) is connected to the first die (3). The other side of the moving template (71) is connected to one side of the second cooling plate (82). The other side of the second cooling plate (82) is connected to the second die (4). The second die (4) is connected to the base (12).

2. The die-casting device for producing a valve plate blank according to claim 1, characterized in that: Liquid inlets (823) are provided at the middle positions of both the first cooling plate (81) and the second cooling plate. The liquid inlets (823) are communicated with the cooling mechanism (5). The first cooling plate (81) and the second cooling plate (82) are provided with multiple groups of concentric annular grooves with increasing diameters from inside to outside along the radial direction. Rectangular openings (822) are arranged at equal distances on the inner walls of the annular grooves, and the rectangular openings (822) are arranged staggeredly.

3. The die-casting device for producing a port plate blank according to claim 1, characterized in that: The stationary template (72) and the moving template (71) are provided with multiple cooling holes (721) in a ring shape. The cooling holes (721) are communicated with the cooling ring grooves (821). Liquid injection grooves (722) are provided at the lower ends of the stationary template (72) and the moving template (71). The two liquid injection grooves (722) are communicated with the injection mechanism (6). The injection mechanism (6) is connected to the base (12). Multiple drain ports (824) are provided at equal distances on the outer ring of the stationary template (72). The multiple drain ports (824) are communicated with the cooling mechanism (5). The cooling mechanism (5) is connected to the base (12). The top of the mold cavity between the stationary template (72) and the moving template (71) is communicated with the anti-overflow device (9).

4. A die-casting device for producing a port plate blank according to claim 3, characterized in that: The anti-overflow device (9) includes a sleeve (91). The sleeve (91) is slidably connected to the moving template (71). One end of the sleeve (91) is communicated with one end of the exhaust pipe (92). The other end of the exhaust pipe (92) is communicated with the top of the mold cavity. The inner ring of the sleeve (91) is slidably connected to the piston (93). One side of the piston (93) away from the exhaust pipe (92) is connected to the output end of the reset hydraulic rod (94). The reset hydraulic rod (94) is drivingly connected to the mold clamping mechanism (1).

5. The die-casting device for producing a valve plate blank according to claim 4, characterized in that: A threaded hole is provided on one side of the sleeve (91) away from the piston (93). The threaded hole is threadedly connected to the metering screw rod (95). One end of the metering screw rod (95) close to the piston (93) is connected to the travel switch (96).

6. The die-casting device for producing a valve plate blank according to claim 1, characterized in that: The two sides of the die-casting mold (7) are slidably connected to the symmetrically arranged unloading plate clamping rods (10). One end of the unloading plate clamping rod (10) passes through the moving template (71) and the static template (72) to be clamped with the flow distribution plate in the mold cavity. The other end of the unloading plate clamping rod (10) passes through the first die pressing (3) at one end to contact the ejection assisting block (11), and the ejection assisting block (11) is connected to the base (12).

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