Die-casting die for front cylinder cover of vehicle air conditioner compressor

Abstract

The utility model relates to a die-casting die for a front cylinder cover of a vehicle air conditioner compressor, which comprises an upper die and a lower die, a cavity is arranged on the top surface of the lower die, a core is arranged on the bottom surface of the upper die, the core is matched with the cavity, a sprue communicated with the inside of the cavity is arranged on the top surface of the upper die, and a cylinder for driving the upper die to lift is fixed on the top surface of the upper die. Piston rods of the cylinders are fixedly connected with the top surface of the upper die; a buffering assembly is arranged on the top face of the lower die and comprises a buffering rod and a buffering spring, a buffering groove allowing the buffering rod to ascend and descend is formed in the top face of the lower die, the buffering spring is located in the buffering groove, one end of the buffering spring is fixedly connected with the inner bottom wall of the buffering groove, and the other end of the buffering spring is fixedly connected with the bottom end of the buffering rod. A buffering cushion is fixedly connected to the top face of the buffering rod, the outer diameter of the buffering cushion is consistent with the outer diameter of the buffering rod, and the buffering cushion can descend till the top face of the buffering cushion is flush with the top face of the lower die. The die has the effect of prolonging the service life of the die.

Description

Technical Field

[0001] The utility model relates to the field of die-casting dies, in particular to a die-casting die for a front cylinder cover of a vehicle air-conditioning compressor. Background Art

[0002] The automotive air conditioning compressor is the heart of the automotive air conditioning system, and plays the role of compressing and driving the refrigerant in the air conditioning refrigerant circuit. The front cylinder head on the air conditioning compressor is both the shell of the compressor and the mounting support for the various parts of the inner cavity. Therefore, in the field of automotive air conditioning compressor manufacturing, there are very high requirements for the material and processing accuracy of the cylinder head.

[0003] In the related art, the front cylinder head of the vehicle air-conditioning compressor is formed by a die-casting process.

[0004] Die casting is a metal casting process characterized by the use of a die cavity to apply high pressure to the molten metal. Die casting requires the use of a die casting mold, which is usually made of a stronger alloy.

[0005] In the related art, the die casting mold includes a lower mold and an upper mold. The lower mold is located below the upper mold. A cavity is formed on the lower mold. A core is provided on one side of the upper mold close to the lower mold. After the upper mold and the lower mold are closed, the core is located in the cavity so that the shape of the front cylinder head is formed in the cavity. A gate connected to the cavity is also provided on the top surface of the upper mold.

[0006] The upper mold and the lower mold are driven by a cylinder during the mold closing process. The drive of the cylinder causes a rigid collision between the upper mold and the lower mold, and the output force of the cylinder is not stable enough. Over time, the upper mold and the lower mold are prone to damage, which reduces the service life of the mold. Utility Model Content

[0007] In order to increase the practical life of the die-casting mold, the present application provides a die-casting mold for a front cylinder head of a vehicle air-conditioning compressor.

[0008] The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor provided in the present application adopts the following technical solution:

[0009] A die-casting mold for a front cylinder head of a vehicle air-conditioning compressor, comprising an upper mold and a lower mold, wherein a mold cavity is formed on the top surface of the lower mold, a mold core is provided on the bottom surface of the upper mold, the mold core cooperates with the mold cavity, a gate communicating with the inside of the mold cavity is formed on the top surface of the upper mold, a cylinder for driving the upper mold to rise and fall is fixed on the top surface of the upper mold, and a piston rod of the cylinder is fixedly connected to the top surface of the upper mold;

[0010] A buffer assembly is arranged on the top surface of the lower die, and the buffer assembly includes a buffer rod and a buffer spring. A buffer groove is opened on the top surface of the lower die for the buffer rod to be lifted and lowered, and the buffer spring is located in the buffer groove. One end of the buffer spring is fixedly connected to the inner bottom wall of the buffer groove, and the other end of the buffer spring is fixedly connected to the bottom end of the buffer rod. The buffer spring applies a force to the buffer rod to make the buffer rod move upward. A buffer pad is fixedly connected to the top surface of the buffer rod, and the outer diameter of the buffer pad is consistent with the outer diameter of the buffer rod. The depth of the buffer groove is greater than the total length of the buffer rod and the buffer pad, and the buffer pad can be lowered until the top surface of the buffer pad is flush with the top surface of the lower die.

[0011] Preferably, the buffer components are arranged in four groups, with each side of the lower mold corresponding to one group.

[0012] Preferably, a guide rod is connected to the outer circumferential wall of the buffer rod, and a guide groove for the guide rod to slide is opened on the inner circumferential wall of the buffer groove. The guide rods of each buffer rod are symmetrically arranged on both sides of the radial direction of the buffer rod, and the guide groove of each buffer groove is adapted to the corresponding guide rod position.

[0013] Preferably, a positioning rod is further provided on the top surface of the lower mold, and the positioning rod is located at the four corners of the top surface of the lower mold. A positioning hole for the positioning rod to pass through is opened on the bottom surface of the upper mold, and the top end of the positioning rod is arranged in an arc shape.

[0014] Preferably, the positioning rod comprises an inner rod core and a friction layer covering the outer side of the inner rod core, the inner rod core is a steel part, the friction layer is a rubber part, and the friction layer abuts against the inner peripheral wall of the positioning hole.

[0015] Preferably, a first plate body is fixedly connected to the outer side walls at both ends of the upper mold, and a second plate body is fixedly connected to the outer side walls at both ends of the lower mold. When the upper mold and the lower mold are assembled, the first plate body and the second plate body are attached to each other on one side thereof and fixed to each other through a connecting assembly.

[0016] The connecting assembly includes a connecting column and a limiting rod, the connecting column is rotatably connected to a side of the second plate body close to the first plate body, the limiting rod is fixedly connected to the outer peripheral wall of the connecting column, and the limiting rod is symmetrically arranged on both sides of the radial direction of the connecting column. The first plate body is provided with a connecting hole for the connecting column to pass through and a limiting hole for the limiting rod to pass through. The distance between the bottom surface of the limiting rod and the top surface of the second plate body is a first length, the thickness of the first plate body is a second length, and the first length is consistent with the second length.

[0017] Preferably, a receiving groove for accommodating the bottom end of the connecting column is provided on the top surface of the second plate body, a positioning ring plate is coaxially connected to the outer peripheral wall of the bottom end of the connecting column, and a positioning ring groove for rotating the positioning ring plate is provided on the inner peripheral wall of the receiving groove.

[0018] Preferably, an ejection assembly is arranged below the lower mold, and the ejection assembly includes a ejector rod, a ejector plate, and an electric push rod. A lifting groove for lifting the ejector rod is opened on the bottom surface of the lower mold, and the lifting groove is connected with the cavity. When the ejector rod is at the lowest position, the top surface of the ejector rod is flush with the inner bottom wall of the cavity. Two ejector rods are arranged, and the top plate is located below the ejector rod. The bottom surfaces of the two ejector rods are connected to the top surface of the top plate at the same time. The electric push rod is located below the top plate, and the movable rod of the electric push rod is connected to the bottom surface of the top plate.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. During the descent of the upper die, the buffer pad on the top of the buffer rod contacts the bottom of the upper die under the action of the buffer spring, which plays a buffering effect, reduces the damage to the upper and lower dies caused by the rigid collision when the upper and lower dies are closed, thereby increasing the service life of the die;

[0021] 2. The friction layer of the positioning rod and the inner wall of the positioning hole produce flexible friction, which further buffers the descent process of the upper mold;

[0022] 3. After the upper mold and the lower mold are closed, the connecting column and the limiting rod pass through the corresponding connecting hole and the limiting hole, and then the connecting column is rotated to make the bottom surface of the limiting rod abut against the top surface of the first plate body, thereby quickly fixing the first plate body and the second plate body, thereby improving the efficiency of fixing the upper mold and the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a die-casting mold for a front cylinder head of a vehicle air-conditioning compressor in an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure used to illustrate the buffer component in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure used to illustrate the positioning rod in the embodiment of the present application.

[0026] Figure 4 It is a structural schematic diagram used to display the connection components in the embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. upper mold; 11. core; 12. gate; 13. positioning hole; 14. first plate; 141. connecting hole; 142. limiting hole; 2. lower mold; 21. cavity; 22. buffer groove; 221. guide groove; 23. second plate; 231. accommodating groove; 232. positioning ring plate; 233. positioning ring groove; 24. lifting groove; 3. cylinder; 4. buffer assembly; 41. buffer rod; 411. guide rod; 42. buffer spring; 43. buffer pad; 5. positioning rod; 51. inner rod core; 52. friction layer; 6. connecting assembly; 61. connecting column; 62. limiting rod; 7. ejector assembly; 71. ejector rod; 72. ejector plate; 73. electric push rod. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a die-casting mold for a front cylinder head of a vehicle air-conditioning compressor.

[0030] Reference Figure 1-4 The die-casting mold of the front cylinder head of the automotive air-conditioning compressor includes an upper mold 1 and a lower mold 2. The lower mold 2 is fixed on the workbench through a supporting block. A cavity 21 is provided on the top surface of the lower mold 2. A core 11 is provided on the bottom surface of the upper mold 1. The core 11 cooperates with the cavity 21. A gate 12 connected to the inside of the cavity 21 is provided on the top surface of the upper mold 1. A cylinder 3 for driving the upper mold 1 to rise and fall is fixed on the top surface of the upper mold 1. The piston rod of the cylinder 3 is fixedly connected to the top surface of the upper mold 1, and the cylinder body of the cylinder 3 is fixed to the workbench through a matching mounting frame.

[0031] A buffer assembly 4 is arranged on the top surface of the lower mold 2, and the buffer assembly 4 includes a buffer rod 41 and a buffer spring 42. A buffer groove 22 is opened on the top surface of the lower mold 2 for the buffer rod 41 to rise and fall. The buffer spring 42 is located in the buffer groove 22, and one end of the buffer spring 42 is fixedly connected to the inner bottom wall of the buffer groove 22, and the other end of the buffer spring 42 is fixedly connected to the bottom end of the buffer rod 41. The buffer spring 42 applies a force to the buffer rod 41 to make the buffer rod 41 move upward; a buffer pad 43 is fixedly connected to the top surface of the buffer rod 41, and the outer diameter of the buffer pad 43 is consistent with the outer diameter of the buffer rod 41. The depth of the buffer groove 22 is greater than the total length of the buffer rod 41 and the buffer pad 43, and the buffer pad 43 can be lowered until the top surface of the buffer pad 43 is flush with the top surface of the lower mold 2.

[0032] During the descent of the upper mold 1, under the action of the buffer spring 42, the buffer pad 43 on the top surface of the buffer rod 41 contacts the bottom surface of the upper mold 1, which has a buffer effect, reducing the damage to the upper mold 1 and the lower mold 2 caused by the rigid collision when the upper mold 1 and the lower mold 2 are closed, thereby increasing the service life of the mold.

[0033] Four groups of buffer components 4 are provided, with each side of the lower mold 2 corresponding to one group, thereby providing a uniform buffering force to the upper mold 1 .

[0034] A guide rod is connected to the outer peripheral wall of the buffer rod 41 , and a guide groove 221 for the guide rod to slide is provided on the inner peripheral wall of the buffer groove 22 , thereby improving the movement stability of the buffer rod 41 .

[0035] The guide rods 411 of each buffer rod 41 are symmetrically arranged on both sides of the buffer rod 41 in the radial direction, and the guide groove 221 of each buffer groove 22 is matched with the position of the corresponding guide rod 411 .

[0036] Positioning rods 5 are also provided on the top surface of the lower mold 2, and the positioning rods 5 are located at the four corners of the top surface of the lower mold 2. Positioning holes 13 for the positioning rods 5 to pass through are opened on the bottom surface of the upper mold 1 to provide positioning guidance for the movement of the upper mold 1.

[0037] The positioning rod 5 includes an inner rod core 51 and a friction layer 52 covering the outer side of the inner rod core 51. The inner rod core 51 is a steel part, and the friction layer 52 is a rubber part. The friction layer 52 abuts against the inner circumferential wall of the positioning hole 13. The friction layer 52 of the positioning rod 5 flexibly rubs against the inner wall of the positioning hole 13, which further has a buffering effect on the descending process of the upper mold 1.

[0038] A first plate body 14 is fixedly connected to the outer side walls at both ends of the upper mold 1, and a second plate body 23 is fixedly connected to the outer side walls at both ends of the lower mold 2. When the upper mold 1 and the lower mold 2 are assembled, the first plate body 14 and the second plate body 23 are close to each other on one side thereof, and the first plate body 14 and the second plate body 23 are fixed by connecting components 6. There are two sets of connecting components 6 corresponding to each first plate body 14, and the two sets of connecting components 6 are symmetrically arranged at both ends of the length direction of the first plate body 14.

[0039] The connecting assembly 6 includes a connecting column 61 and a limiting rod 62. The connecting column 61 is rotatably connected to a surface of the second plate body 23 close to the first plate body 14. The limiting rod 62 is fixedly connected to the outer peripheral wall of the connecting column 61. The limiting rod 62 is symmetrically arranged on both sides of the radial direction of the connecting column 61. The first plate body 14 is provided with a connecting hole 141 for the connecting column 61 to pass through and a limiting hole 142 for the limiting rod 62 to pass through. The distance between the bottom surface of the limiting rod 62 and the top surface of the second plate body 23 is a first length. The thickness of the first plate body 14 is a second length. The first length is consistent with the second length.

[0040] After the upper mold 1 and the lower mold 2 are molded together, the connecting column 61 and the limiting rod 62 pass through the corresponding connecting holes 141 and limiting holes 142, and then the connecting column 61 is rotated to make the bottom surface of the limiting rod 62 abut against the top surface of the first plate body 14, thereby quickly fixing the first plate body 14 and the second plate body 23, thereby improving the efficiency of fixing the upper mold 1 and the lower mold 2. When it is necessary to release the fixation, the connecting column 61 is rotated until the limiting rod 62 is aligned with the limiting hole 142 so that the limiting rod 62 can move along the limiting hole 142 to separate the upper mold 1 and the lower mold 2.

[0041] A receiving groove 231 is provided on the top surface of the second plate body 23 for accommodating the bottom end of the connecting column 61, a positioning ring plate 232 is coaxially connected to the outer peripheral wall of the bottom end of the connecting column 61, and a positioning ring groove 233 is provided on the inner peripheral wall of the receiving groove 231 for the positioning ring plate 232 to rotate. When the connecting column 61 is rotated, the positioning ring plate 232 rotates in the positioning ring groove 233 to axially position the connecting column 61.

[0042] An ejection assembly 7 is arranged below the lower mold 2, and the ejection assembly 7 includes a push rod 71, a top plate 72, and an electric push rod 73. A lifting groove 24 for lifting and lowering the push rod 71 is opened on the bottom surface of the lower mold 2, and the lifting groove 24 is connected with the cavity 21. When the push rod 71 is at the lowest position, the top surface of the push rod 71 is flush with the inner bottom wall of the cavity 21. Two push rods 71 ​​are arranged, and the top plate 72 is located below the push rod 71. The bottom surfaces of the two push rods 71 ​​are connected to the top surface of the top plate 72 at the same time. The electric push rod 73 is located below the top plate 72. The shell of the electric push rod 73 is fixed on the workbench, and the movable rod of the electric push rod 73 is connected to the bottom surface of the top plate 72.

[0043] When demolding is required, the connecting column 61 is rotated until the limiting rod 62 is aligned with the limiting hole 142, and then the piston rod of the cylinder 3 is retracted to drive the upper mold 1 to rise to its original position, and then the movable rod of the electric push rod 73 is extended to drive the two push rods 71 ​​to rise to push the workpiece out of the cavity 21, so as to facilitate the removal of the workpiece.

[0044] The implementation principle of the die-casting mold of the front cylinder head of a vehicle air-conditioning compressor in the embodiment of the present application is as follows:

[0045] When the mold is closed, the cylinder 3 drives the upper mold 1 to descend. Under the action of the buffer spring 42, the buffer pad 43 on the top surface of the buffer rod 41 contacts the bottom surface of the upper mold 1, which has a buffer effect. When the upper mold 1 and the lower mold 2 are close to each other, the buffer rod 41 and the buffer pad 43 are completely located in the buffer groove 22 and do not hinder the mold closing. At this time, the connecting column 61 and the limiting rod 62 pass through the corresponding connecting hole 141 and the limiting hole 142, and then the connecting column 61 is rotated to make the bottom surface of the limiting rod 62 abut against the top surface of the first plate body 14, so as to quickly fix the upper mold 1 and the lower mold 2, and then inject the molten metal through the gate 12 and wait for molding.

[0046] When demolding is required after molding, the connecting column 61 is rotated until the limiting rod 62 is aligned with the limiting hole 142, and then the piston rod of the cylinder 3 is retracted to drive the upper mold 1 to rise to its original position, and then the movable rod of the electric push rod 73 is extended to drive the two ejector rods 71 ​​to rise to eject the workpiece out of the cavity 21.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A die-casting mold for a front cylinder head of a vehicle air-conditioning compressor, characterized in that: The invention comprises an upper mold (1) and a lower mold (2), wherein a mold cavity (21) is provided on the top surface of the lower mold (2), a mold core (11) is provided on the bottom surface of the upper mold (1), the mold core (11) cooperates with the mold cavity (21), a gate (12) connected to the inside of the mold cavity (21) is provided on the top surface of the upper mold (1), and a cylinder (3) for driving the upper mold (1) to rise and fall is fixed on the top surface of the upper mold (1), and a piston rod of the cylinder (3) is fixedly connected to the top surface of the upper mold (1); A buffer assembly (4) is arranged on the top surface of the lower mold (2), and the buffer assembly (4) comprises a buffer rod (41) and a buffer spring (42). A buffer groove (22) for the buffer rod (41) to be lifted and lowered is provided on the top surface of the lower mold (2). The buffer spring (42) is located in the buffer groove (22), one end of the buffer spring (42) is fixedly connected to the inner bottom wall of the buffer groove (22), and the other end of the buffer spring (42) is fixedly connected to the bottom end of the buffer rod (41). The buffer spring (42) applies a force to the buffer rod (41) to move the buffer rod (41) upward; a buffer pad (43) is fixedly connected to the top surface of the buffer rod (41); the outer diameter of the buffer pad (43) is consistent with the outer diameter of the buffer rod (41); the depth of the buffer groove (22) is greater than the total length of the buffer rod (41) and the buffer pad (43); and the buffer pad (43) can be lowered until the top surface of the buffer pad (43) is flush with the top surface of the lower mold (2).

2. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 1, characterized in that: The buffer components (4) are arranged in four groups, with each side of the lower mold (2) corresponding to one group.

3. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 1, characterized in that: A guide rod (411) is connected to the outer peripheral wall of the buffer rod (41), and a guide groove (221) for the guide rod (411) to slide is provided on the inner peripheral wall of the buffer groove (22). The guide rod (411) of each buffer rod (41) is symmetrically arranged on both sides of the buffer rod (41) in a radial direction, and the guide groove (221) of each buffer groove (22) is adapted to the position of the corresponding guide rod (411).

4. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 1, characterized in that: A positioning rod (5) is also provided on the top surface of the lower mold (2), and the positioning rod (5) is located at the four corners of the top surface of the lower mold (2). A positioning hole (13) for the positioning rod (5) to pass through is opened on the bottom surface of the upper mold (1), and the top end of the positioning rod (5) is arranged in an arc shape.

5. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 4, characterized in that: The positioning rod (5) comprises an inner rod core (51) and a friction layer (52) covering the outer side of the inner rod core (51); the inner rod core (51) is a steel part; the friction layer (52) is a rubber part; and the friction layer (52) abuts against the inner peripheral wall of the positioning hole (13).

6. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 1, characterized in that: The outer side walls at both ends of the upper mold (1) are fixedly connected to a first plate body (14), and the outer side walls at both ends of the lower mold (2) are fixedly connected to a second plate body (23); when the upper mold (1) and the lower mold (2) are assembled, the first plate body (14) and the second plate body (23) are attached to each other on one side thereof and fixed to the first plate body (14) and the second plate body (23) via a connecting assembly (6); The connecting assembly (6) comprises a connecting column (61) and a limiting rod (62), wherein the connecting column (61) is rotatably connected to a surface of the second plate body (23) close to the first plate body (14), and the limiting rod (62) is fixedly connected to the outer peripheral wall of the connecting column (61). The limiting rod (62) is symmetrically arranged on both sides of the connecting column (61) in a radial direction. The first plate body (14) is provided with a connecting hole (141) for the connecting column (61) to pass through and a limiting hole (142) for the limiting rod (62) to pass through. The distance between the bottom surface of the limiting rod (62) and the top surface of the second plate body (23) is a first length, and the thickness of the first plate body (14) is a second length, and the first length is consistent with the second length.

7. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 6, characterized in that: A receiving groove (231) for receiving the bottom end of the connecting column (61) is provided on the top surface of the second plate body (23); a positioning ring plate (232) is coaxially connected to the outer peripheral wall of the bottom end of the connecting column (61); and a positioning ring groove (233) for the positioning ring plate (232) to rotate is provided on the inner peripheral wall of the receiving groove (231).

8. The die-casting mold for the front cylinder head of a vehicle air-conditioning compressor according to claim 1, characterized in that: An ejection assembly (7) is arranged below the lower mold (2), and the ejection assembly (7) comprises an ejector rod (71), a top plate (72), and an electric push rod (73). A lifting groove (24) for lifting the ejector rod (71) is provided on the bottom surface of the lower mold (2), and the lifting groove (24) is communicated with the mold cavity (21). When the ejector rod (71) is located at the lowest position, the top surface of the ejector rod (71) is flush with the inner bottom wall of the mold cavity (21). Two ejector rods (71) are arranged, and the top plate (72) is located below the ejector rod (71). The bottom surfaces of the two ejector rods (71) are connected to the top surface of the top plate (72) at the same time. The electric push rod (73) is located below the top plate (72), and the movable rod of the electric push rod (73) is connected to the bottom surface of the top plate (72).

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