Die casting equipment for heat dissipation shell

Abstract

The invention relates to the technical field of die casting, in particular to heat dissipation shell die casting equipment which comprises a fixed die and a movable die. A buffering unit is arranged on the periphery of the movable mold and comprises a buffering sleeve arranged in the vertical direction, a buffering groove is formed in the buffering sleeve in the vertical direction in a penetrating mode, the sections of an upper opening and a lower opening of the buffering groove are large, the section of the middle section of the buffering groove is small, and a buffering block is arranged on the lower portion of the buffering groove in a sliding mode in the vertical direction. A pressing plate is slidably arranged on the upper portion of the middle section of the buffering sleeve in the vertical direction, hydraulic oil is arranged in the buffering groove between the buffering block and the pressing plate, a first gap exists between the pressing plate and the upper end of the buffering sleeve, and a first spring is arranged in the first gap in the vertical direction. A bearing plate is arranged at the upper part of the fixed mold. The safety of the movable mold and the fixed mold during daily operation is guaranteed, and meanwhile the abrasion loss of the movable mold and the fixed mold during contact is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of die-casting, and in particular to a heat dissipation housing die-casting device. Background Art

[0002] When the die-casting machine is die-casting the heat dissipation shell, the die-casting machine pushes the movable mold to move at a very fast speed, which causes impact force when the movable mold quickly contacts the fixed mold, and there is a rebound phenomenon, which affects the closure between the movable mold and the fixed mold, making it easy to produce gaps when the molds are closed, and there is a risk of liquid leakage. In the process of injecting molten metal into the mold cavity, the mold will also be subjected to an expansion force, which will cause the movable mold to shift in position, which will also cause the molten metal to leak.

[0003] Chinese patent CN115592086B discloses a controller housing die-casting device, including a fixed mold mechanism and a movable mold mechanism arranged on a die-casting machine frame, the movable mold mechanism is provided with a mold-closing buffer, and a locking mechanism is provided at the mold-closing position of the movable mold mechanism and the fixed mold mechanism. The locking mechanism includes a locking assembly arranged at the fixed mold clamping position and a positioning assembly arranged at the movable mold clamping position and cooperating with the locking assembly, which is helpful to avoid the movable mold and the fixed mold from being unable to be tightly closed due to rebound force, and to avoid gaps caused by movement due to the reaction force when the metal liquid is injected.

[0004] The above scheme can also be applied to the die-casting operation of the heat dissipation housing. The above scheme is to set a buffer on one side of the movable mold to reduce the rebound amount of the movable mold and the fixed mold when they are in contact. The buffer is a spring, but it cannot avoid the mutual impact between the movable mold and the fixed mold when they are in contact. This is because the spring can only play a buffering role after the movable mold and the fixed mold are in contact, and the impact of the movable mold and the fixed mold each time they are in contact is the largest, resulting in a large amount of wear on the movable mold and the fixed mold each time they are in contact. After long-term use, the contact end surfaces of the movable mold and the fixed mold are gradually damaged, which leads to the situation that the metal liquid still flows out after the movable mold and the fixed mold are closed. Although the existing technology can pre-set the moving speed of the movable mold so that the movable mold is in a slower state when it contacts the fixed mold, there is a certain risk only through program preset, and it is impossible to deal with unexpected situations caused by program failure. Summary of the invention

[0005] In view of the above problems, a heat dissipation shell die-casting equipment is provided. By setting a buffer sleeve and a buffer block in the buffer sleeve, before the movable mold contacts the fixed mold, the buffer block first contacts with the receiving plate arranged on the fixed mold, and the middle section of the buffer groove decelerates the hydraulic oil, thereby achieving the deceleration effect before the fixed mold and the movable mold contact, reducing the probability and amount of damage to the fixed mold and the movable mold when they contact.

[0006] To solve the problems of the prior art, the present invention provides a heat dissipation shell die-casting equipment, including a fixed mold and a movable mold; a buffer unit is arranged on the outer periphery of the movable mold, the buffer unit includes a buffer sleeve arranged along the vertical direction, a buffer groove is penetrated through the buffer sleeve along the vertical direction, the upper opening and the lower opening of the buffer groove have large cross-sections, and the middle section of the buffer groove has a small cross-section, a buffer block is slidably arranged at the lower part of the buffer groove along the vertical direction, the lower end of the buffer block extends out from the lower opening of the buffer groove, a pressing plate is slidably arranged at the upper part of the middle section of the buffer sleeve along the vertical direction, hydraulic oil is arranged in the buffer groove between the buffer block and the pressing plate, a first gap exists between the pressing plate and the upper end of the buffer sleeve, a first spring is arranged in the first gap along the vertical direction, two ends of the first spring are respectively fixedly connected to the upper ends of the pressing plate and the buffer sleeve, a receiving plate is arranged at the upper part of the fixed mold, and before the movable mold and the fixed mold are closed, the lower end of the buffer block first contacts with the receiving plate.

[0007] Preferably, the buffer sleeve can move in the vertical direction and has a highest position and a lowest position on the moving path of the buffer sleeve. Before the movable mold contacts the fixed mold, the buffer sleeve is in the lowest position. When the movable mold contacts the fixed mold, the position of the buffer sleeve remains unchanged, and the first spring is in a compressed state. After the movable mold contacts the fixed mold, the buffer sleeve rises to the highest position in the vertical direction, and the first spring is in an initial state.

[0008] Preferably, a circular groove is provided at the center of the receiving plate, and a suction cup is arranged in the circular groove, with the opening of the suction cup facing vertically upwards. When the buffer block contacts the receiving plate, the suction cup absorbs the lower part of the buffer block.

[0009] Preferably, a ventilation groove is provided on the fixed mold, one end of which is arranged at the tail of the suction cup and connected to the opening of the suction cup, and the other end of the ventilation groove passes through the side wall of the fixed mold. A valve body is provided on the end of the ventilation groove passing through the side wall of the fixed mold. When the movable mold and the fixed mold are closed, the valve body is in a closed state, and before the movable mold and the fixed mold are separated, the valve body is opened.

[0010] Preferably, a support plate is horizontally arranged above the buffer sleeve, the support plate is fixedly arranged on the side wall of the movable mold, a lifting plate is fixedly arranged on the upper part of the buffer sleeve, a first threaded rod is rotatably arranged on the upper part of the lifting plate along the vertical direction, the first threaded rod penetrates the support plate along the vertical direction and slides with the support plate, a groove is opened on the side wall of the first threaded rod along the axial direction of the first threaded rod, the first threaded rod is keyed to the support plate through the groove, a first toothed ring is arranged around the first threaded rod sleeve on the upper part of the support plate, and the first toothed ring is threadably engaged with the first threaded rod.

[0011] Preferably, a locking unit is provided on the movable mold and the fixed mold, and the locking unit includes a fixing plate fixed horizontally on the side wall of the fixed mold, a lifting frame moving in the vertical direction is provided on the side of the movable mold, a driving unit for driving the lifting frame to move up and down is provided on the upper part of the lifting frame, and a locking claw is hinged at the lower part of the lifting frame, the locking claw is engaged with the fixing rod, and the lower end surface of the locking claw is an inclined structure.

[0012] Preferably, a second threaded rod is vertically arranged on the upper part of the lifting frame, a fixing plate is horizontally fixedly arranged on the side wall of the movable mold, the second threaded rod passes through the fixing plate in the vertical direction and is slidingly matched with the fixing plate, and the second threaded rod is key-connected with the fixing plate, a second toothed ring is arranged on the upper part of the fixing plate, the second toothed ring is sleeved on the outside of the second threaded rod, and the second toothed ring is threadably matched with the second threaded rod.

[0013] Preferably, a tension sleeve is fixedly provided on the upper part of the lifting frame in the vertical direction, a second threaded rod penetrates into the tension sleeve from the upper part of the tension sleeve and slides with the tension sleeve, a tension plate is fixedly provided on the bottom of the second threaded rod, the tension plate is located in the tension sleeve and slides with the tension sleeve, a second gap is provided between the tension plate and the upper part of the tension sleeve, a second spring is vertically provided in the second gap, and both ends of the second spring are respectively fixedly provided on the upper part of the tension plate and the tension sleeve.

[0014] Preferably, the driving unit includes a vane pump and a gear, the gear is rotatably arranged on the fixed plate, the gear is respectively meshed with the first gear ring and the second gear ring, and a vane pump for driving the gear to rotate is arranged at the lower part of the gear.

[0015] Preferably, an electromagnet is provided on one side of the bottom of the lifting frame, and the locking claw can be attracted and rotated by the electromagnet after being energized.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The movable mold is driven by hydraulic pressure to move. When the heat dissipation shell is die-casted, the movable mold descends in the vertical direction. Before the movable mold contacts the fixed mold, the buffer block will first contact the receiving plate arranged on the fixed mold to avoid the wear caused by the direct contact between the end face of the fixed mold and the end face of the movable mold. After the buffer block contacts the receiving plate, as the movable mold continues to move, the buffer block slides into the buffer groove in the vertical direction, and the hydraulic oil on the lower side of the buffer groove flows to the upper side of the buffer groove through the middle section of the buffer groove. In this way, the hydraulic oil flowing in the buffer groove can push the pressing plate on the upper side of the middle section of the buffer groove to rise, and the first spring arranged between the pressing plate and the upper end of the buffer sleeve is gradually squeezed by the rising pressing plate. Since the cross-section of the middle section of the buffer groove is smaller than the upper opening cross-section and The lower opening cross-section of the buffer groove, when the hydraulic oil on the lower side of the middle section of the buffer groove passes through the middle section of the buffer groove, the hydraulic oil is overflowed by the middle section of the buffer groove, so that the speed at which the buffer block retracts into the buffer sleeve is slowed down. At the same time, since a first spring is provided on one side of the pressing plate, as the buffer block slides into the buffer sleeve, the first spring on one side of the pressing plate is gradually squeezed, and the elastic force of the first spring gradually increases, so that the speed at which the buffer block slides into the buffer sleeve gradually decreases, thereby achieving a deceleration effect. When the preset program for controlling the movement of the movable mold fails, the buffering effect of the above-mentioned buffer unit can avoid accidental collision between the movable mold and the fixed mold, thereby ensuring the safety of the movable mold and the fixed mold during daily operation, and also reducing the amount of wear between the movable mold and the fixed mold when in contact.

[0018] 2. Since the receiving plate is replaceable, after long-term use, it is only necessary to remove the receiving plate set on the fixed mold and replace it, which reduces the cost of use.

[0019] 3. By setting the suction cup, it is ensured that when the buffer sleeve is driven to rise, the buffer block will not separate from the upper part of the receiving plate, avoiding the buffer block from having a secondary impact on the receiving plate under the resetting action of the first spring. At the same time, the suction force of the suction cup on the buffer block can assist the first spring to recover faster, thereby extending the service life of the first spring and reducing the maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a heat dissipation housing die-casting device of the present invention.

[0021] Figure 2 The invention is a heat dissipation shell die-casting equipment Figure 1 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 3 The invention is a heat dissipation shell die-casting equipment Figure 1 A local enlarged schematic diagram of point B in the middle.

[0023] Figure 4 It is a side view of a heat dissipation housing die-casting device of the present invention.

[0024] Figure 5 The invention is a heat dissipation shell die-casting equipment Figure 4 Schematic cross-sectional view at CC in the middle.

[0025] Figure 6 A cutaway perspective view of a heat dissipation housing die-casting device of the present invention Figure 1 .

[0026] Figure 7 The invention is a heat dissipation shell die-casting equipment Figure 6 A partial enlarged schematic diagram of point D in the middle.

[0027] Figure 8 The invention is a heat dissipation shell die-casting equipment Figure 6 A partial enlarged schematic diagram of point E in the middle.

[0028] Fig. 9 A cutaway perspective view of a heat dissipation housing die-casting device of the present invention Figure 2 .

[0029] Fig.10 The invention is a heat dissipation shell die-casting equipment Fig. 9 A partial enlarged schematic diagram of point F in the middle.

[0030] Fig.11 A cutaway perspective view of a heat dissipation housing die-casting device of the present invention Figure 3 .

[0031] Fig.12 The invention is a heat dissipation shell die-casting equipment Fig.11 A local enlarged schematic diagram of point G in the middle.

[0032] Fig.13 It is a three-dimensional schematic diagram of a heat dissipation housing die-casting device of the present invention with a movable mold removed.

[0033] The numbers in the figure are:

[0034] 1. Fixed mold; 11. Suction cup; 12. Vent groove; 13. Valve body; 2. Moving mold; 3. Buffer unit; 31. Buffer sleeve; 311. Buffer groove; 312. Lifting plate; 313. First threaded rod; 314. First gear ring; 315. Support plate; 32. Buffer block; 33. First spring; 34. Pressing plate; 4. Receiver plate; 5. Heat dissipation shell; 6. Locking unit; 61. Locking claw; 62. Fixed rod; 63. Lifting frame; 631. Electromagnet; 64. Driving unit; 641. Vane pump; 642. Gear; 65. Second gear ring; 66. Second threaded rod; 67. Fixed plate; 68. Tension sleeve; 681. Second spring; 682. Tension plate. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1 , Figure 4 , Figure 5 , Fig. 9 , Fig.10 and Fig.13 A heat dissipation housing die-casting device, comprising a fixed die 1 and a movable die 2; a buffer unit 3 is arranged on the outer periphery of the movable die 2, the buffer unit 3 comprises a buffer sleeve 31 arranged in the vertical direction, a buffer groove 311 is penetrated in the buffer sleeve 31 in the vertical direction, the upper opening and the lower opening of the buffer groove 311 have large cross-sections, the middle section of the buffer groove 311 has a small cross-section, a buffer block 32 is slidably arranged in the lower part of the buffer groove 311 in the vertical direction, the lower end of the buffer block 32 extends from the lower opening of the buffer groove 311, and the buffer sleeve 31 is provided with a buffer block 32. A pressing plate 34 is slidably provided on the upper part of the middle section of 31 along the vertical direction, and hydraulic oil is provided in the buffer groove 311 between the buffer block 32 and the pressing plate 34. A first gap exists between the pressing plate 34 and the upper end of the buffer sleeve 31, and a first spring 33 is provided in the first gap along the vertical direction. The two ends of the first spring 33 are respectively fixedly connected with the upper ends of the pressing plate 34 and the buffer sleeve 31, and a receiving plate 4 is provided on the upper part of the fixed mold 1. Before the movable mold 2 is closed with the fixed mold 1, the lower end of the buffer block 32 contacts with the receiving plate 4 first.

[0037] The fixed mold 1 and the movable mold 2 are arranged in the vertical direction, and the movable mold 2 is arranged above the fixed mold 1. During the die-casting process of the heat dissipation shell 5, the movable mold 2 descends in the vertical direction and completes the mold closing after contacting with the upper end of the fixed mold 1. Then, the mold cavity formed between the fixed mold 1 and the movable mold 2 is filled with molten metal. After the molten metal is cooled, the movable mold 2 rises from the fixed mold 1, so that the movable mold 2 and the fixed mold 1 are separated, and the heat dissipation shell 5 on the fixed mold 1 is taken out, thereby completing the die-casting process of the heat dissipation shell 5. During the movement of the movable mold 2 toward the fixed mold 1, the end face of the movable mold 2 will contact with the end face of the fixed mold 1, so it is inevitable that the end face of the movable mold 2 will collide with the end face of the fixed mold 1. The existing buffering method is to set a buffer spring on the side of the movable mold 2, but the end surface of the movable mold 2 needs to contact the end surface of the fixed mold 1 first before the buffer spring can play a buffering role. The impact force is the largest when the movable mold 2 and the fixed mold 1 just contact. The buffer spring cannot reduce the wear of the movable mold 2 and the fixed mold 1 caused by the impact when the mold is closed.

[0038] In order to reduce the amount of wear generated when the fixed mold 1 and the movable mold 2 are in contact, the buffer unit 3 is optimized, thereby effectively extending the maintenance cycle of the movable mold 2 and the fixed mold 1. The detailed structure and working principle of the buffer unit 3 are described as follows:

[0039] The movable mold 2 is controlled and moved by the hydraulic drive system. During the die-casting process of the heat dissipation housing 5, the movable mold 2 descends in the vertical direction. Before the movable mold 2 contacts the fixed mold 1, the buffer block 32 first contacts the receiving plate 4 installed on the fixed mold 1. This design avoids direct friction and wear between the end face of the fixed mold 1 and the end face of the movable mold 2. After the buffer block 32 contacts the receiving plate 4, as the movable mold 2 continues to descend, the buffer block 32 slides into the buffer groove 311 in the vertical direction. At this time, the hydraulic oil on the lower side of the buffer groove 311 flows to the upper side of the buffer groove 311 through its middle section. This flow process causes the hydraulic oil to lift the pressing plate 34 on the upper side of the middle section of the buffer groove 311. A first spring 33 is installed between the pressing plate 34 and the upper end of the buffer sleeve 31. As the pressing plate 34 rises, the first spring 33 is gradually compressed. Since the middle section of the buffer groove 311 is smaller than the upper opening section and the lower opening section, when the hydraulic oil flows through the middle section of the buffer groove 311, an overflow effect will occur, thereby slowing down the speed at which the buffer block 32 retracts into the buffer sleeve 31. At the same time, as the buffer block 32 further slides into the buffer sleeve 31, the first spring 33 on one side of the pressing plate 34 continues to be compressed, and its elastic force gradually increases. This process further reduces the speed at which the buffer block 32 slides into the buffer sleeve 31, achieving an effective deceleration effect. In addition, when the preset program for controlling the movement of the movable mold 2 fails, the buffering effect of the above-mentioned buffer unit 3 can effectively prevent accidental collisions between the movable mold 2 and the fixed mold 1, thereby ensuring the safety of the movable mold 2 and the fixed mold 1 in daily operations and significantly reducing the amount of wear between the two when in contact.

[0040] Reference Figure 1-Figure 13 : The buffer sleeve 31 can move in the vertical direction, and has a highest position and a lowest position on the moving path of the buffer sleeve 31. Before the movable mold 2 contacts the fixed mold 1, the buffer sleeve 31 is at the lowest position. When the movable mold 2 contacts the fixed mold 1, the position of the buffer sleeve 31 remains unchanged, and the first spring 33 is in a compressed state. After the movable mold 2 contacts the fixed mold 1, the buffer sleeve 31 rises to the highest position in the vertical direction, and the first spring 33 is in an initial state.

[0041] The first spring 33 being in the initial state means that the first spring 33 is in an uncompressed state at this time. When the movable mold 2 moves toward the fixed mold 1, the buffer sleeve 31 is in the lowest position at this time, and the first spring 33 located in the buffer sleeve 31 is in an uncompressed state. When the buffer block 32 contacts the receiving plate 4 on the fixed mold 1, the receiving plate 4 receives the buffer block 32, thereby preventing the buffer block 32 from directly contacting the end face of the fixed mold 1, thereby causing damage to the end face of the fixed mold 1. After the buffer block 32 contacts the receiving plate 4, the movable mold 2 continues to move toward the fixed mold 1. At this time, the first spring 33 is gradually compressed. When the movable mold 2 is in full contact with the fixed mold 1, the first spring 33 is compressed to the minimum state, and then When the movable mold 2 and the fixed mold 1 form a mold cavity, the metal liquid is added. It takes a certain amount of time to add the metal liquid until the metal liquid cools and forms. If the buffer sleeve 31 cannot rise in the vertical direction, the first spring 33 needs to be in a compressed state all the time, which may shorten the service life of the first spring 33. After the movable mold 2 and the fixed mold 1 are in contact, the buffer sleeve 31 rises to the highest position in the vertical direction, so that the first spring 33 can be gradually restored in the process of the buffer sleeve 31 rising in the vertical direction, until the buffer sleeve 31 rises to the highest position, the first spring 33 returns to the initial state. By raising and lowering the buffer sleeve 31, the first spring 33 will not be in a compressed state for a long time, thereby extending the service life of the first spring 33.

[0042] Reference Figure 8 A circular groove is provided at the center of the receiving plate 4, and a suction cup 11 is arranged in the circular groove. The opening of the suction cup 11 is vertically facing upward. When the buffer block 32 contacts the receiving plate 4, the suction cup 11 absorbs the lower part of the buffer block 32.

[0043] Reference Figure 8 A vent groove 12 is provided on the fixed mold 1, one end of the vent groove 12 is arranged at the tail of the suction cup 11 and is connected with the opening of the suction cup 11, and the other end of the vent groove 12 passes through the side wall of the fixed mold 1, and a valve body 13 is provided on the end of the vent groove 12 passing through the side wall of the fixed mold 1. When the movable mold 2 and the fixed mold 1 are closed, the valve body 13 is in a closed state, and before the movable mold 2 and the fixed mold 1 are separated, the valve body 13 is opened.

[0044] When the buffer block 32 contacts the receiving plate 4, the suction cup 11 provided on the receiving plate 4 will be squeezed by the buffer block 32, so that the air at the opening of the suction cup 11 is squeezed out. After the movable mold 2 and the fixed mold 1 complete the mold closing, in order to extend the service life of the first spring 33, the buffer sleeve 31 rises in the vertical direction, and the first spring 33 gradually recovers from the compressed state. If the suction cup 11 is not provided, when the buffer sleeve 31 rises, due to the action of the middle section of the buffer groove 311, the buffer block 32 will be out of contact with the receiving plate 4. This is because the action of the buffer groove 311 has a deceleration effect, which makes it impossible for the hydraulic oil on the upper side of the middle section of the buffer groove 311 to be quickly transferred to the lower side of the middle section of the buffer groove 311, thereby making it impossible for the buffer block 32 to always be in contact with the receiving plate 4 when the buffer sleeve 31 rises. The first spring 33 is in contact with the receiving plate 4, and under the action of the first spring 33, the elastic force of the first spring 33 will push the buffer block 32 to the upper part of the receiving plate 4 and contact with the receiving plate 4 again, thereby increasing the recovery time of the first spring 33 and also causing a secondary impact of the buffer block 32 on the receiving plate 4. After the suction cup 11 is set, the bottom of the buffer block 32 is adsorbed by the suction cup 11, so that when the buffer sleeve 31 rises, the buffer block 32 can be subjected to the pulling force of the suction cup 11, thereby reducing the recovery time of the first spring 33, and when the buffer sleeve 31 rises to the highest position, the buffer block 32 is always in contact with the receiving plate 4, thereby avoiding the secondary impact of the buffer block 32 on the receiving plate 4 and extending the service life of the first spring 33. In order to ensure that the suction cup 11 can be released from adsorption when the movable mold 2 and the fixed mold 1 are separated, a ventilation groove 12 connected to the suction cup 11 is provided at the tail of the suction cup 11, and a valve body 13 is provided at the end of the ventilation groove 12. Before the movable mold 2 and the fixed mold 1 are separated, the valve body 13 is opened, so that the opening of the suction cup 11 is connected to the outside world, so that the suction cup 11 releases the adsorption of the buffer block 32.

[0045] Reference Fig.10 A support plate 315 is horizontally arranged above the buffer sleeve 31, and the support plate 315 is fixedly arranged on the side wall of the movable mold 2. A lifting plate 312 is fixedly arranged on the upper part of the buffer sleeve 31, and a first threaded rod 313 is rotatably arranged on the upper part of the lifting plate 312 along the vertical direction. The first threaded rod 313 penetrates the support plate 315 along the vertical direction and slides with the support plate 315. A groove is opened on the side wall of the first threaded rod 313 along the axial direction of the first threaded rod 313. The first threaded rod 313 is key-connected with the support plate 315 through the groove. A first toothed ring 314 is sleeved around the first threaded rod 313 on the upper part of the support plate 315, and the first toothed ring 314 is threadedly engaged with the first threaded rod 313.

[0046] When the movable mold 2 and the fixed mold 1 are in contact, the first gear ring 314 starts to rotate, and the first gear ring 314 drives the first threaded rod 313 to rise or fall in the vertical direction, and the first threaded rod 313 drives the lifting plate 312 to rise or fall, so that the buffer sleeve 31 can be lifted and lowered synchronously with the lifting plate 312.

[0047] Reference Figure 1 , Figure 3 and Figure 4 : A locking unit 6 is provided on the movable mold 2 and the fixed mold 1, and the locking unit 6 includes a fixing plate 67 fixed horizontally on the side wall of the fixed mold 1, and a lifting frame 63 moving in the vertical direction is provided on the side of the movable mold 2, and a driving unit 64 driving the lifting frame 63 to move up and down is provided on the upper part of the lifting frame 63, and a locking claw 61 is hinged at the lower part of the lifting frame 63, and the locking claw 61 is engaged with the fixing rod 62, and the lower end surface of the locking claw 61 is an inclined structure.

[0048] During the process of closing the movable mold 2 and the fixed mold 1, the lower end surface of the locking claw 61 first contacts the fixed rod 62. Since the lower end surface of the locking claw 61 is an inclined structure, the locking claw 61 will be pushed open by the fixed rod 62 after contacting the fixed rod 62. Since the locking claw 61 is hingedly cooperated with the lifting frame 63, the locking claw 61 is tilted after being pushed open by the fixed rod 62. When the lower part of the locking claw 61 is offset from the fixed rod 62, the locking claw 61 returns to the vertical state again. At this time, the lifting frame 63 rises in the vertical direction, and the locking claw 61 hinged at the bottom of the lifting frame 63 is engaged with the fixed rod 62, thereby completing the autonomous locking of the movable mold 2 and the fixed mold 1.

[0049] Reference Figure 7 and Fig. 9 A second threaded rod 66 is vertically arranged on the upper part of the lifting frame 63, and a fixing plate 67 is horizontally fixedly arranged on the side wall of the movable mold 2. The second threaded rod 66 penetrates the fixing plate 67 in the vertical direction and slides with the fixing plate 67, and the second threaded rod 66 is key-connected with the fixing plate 67. A second toothed ring 65 is arranged on the upper part of the fixing plate 67, and the second toothed ring 65 is sleeved on the outside of the second threaded rod 66, and the second toothed ring 65 is threadedly engaged with the second threaded rod 66.

[0050] In this way, the second gear ring 65 is driven by the driving unit 64 , so that the lifting frame 63 can be lifted and lowered in the vertical direction.

[0051] Reference Fig.12A tension sleeve 68 is fixedly provided along the vertical direction on the upper part of the lifting frame 63, a second threaded rod 66 penetrates into the tension sleeve 68 from the upper part and slides with the tension sleeve 68, a tension plate 682 is fixedly provided at the bottom of the second threaded rod 66, the tension plate 682 is located in the tension sleeve 68 and slides with the tension sleeve 68, a second gap is present between the tension plate 682 and the upper part of the tension sleeve 68, a second spring 681 is vertically provided in the second gap, and both ends of the second spring 681 are fixedly provided on the tension plate 682 and the upper part of the tension sleeve 68, respectively.

[0052] During the process of closing the movable mold 2 and the fixed mold 1, when the locking claw 61 contacts the fixed rod 62, the tension plate 682 contacts the bottom of the tension sleeve 68. When the locking claw 61 and the fixed rod 62 are staggered, the second threaded rod 66 rises in the vertical direction. The second threaded rod 66 drives the tension sleeve 68 through the second spring 681 between the tension plate 682 and the tension sleeve 68, thereby causing the lifting frame 63 to rise, thereby realizing the clamping connection between the locking claw 61 and the fixed rod 62. After the locking claw 61 and the fixed rod 62 are clamped, the second threaded rod 66 continues to rise, so that the second spring 681 is further compressed, thereby increasing the clamping force between the locking claw 61 and the fixed rod 62.

[0053] Reference Figure 7 The driving unit 64 includes a vane pump 641 and a gear 642. The gear 642 is rotatably disposed on the fixed plate 67. The gear 642 is respectively meshed with the first gear ring 314 and the second gear ring 65. A vane pump 641 is disposed at the lower portion of the gear 642 to drive the gear 642 to rotate.

[0054] When the gear 642 rotates, the first gear ring 314 and the second gear ring 65 meshing with the gear 642 can rotate synchronously, and the first threaded rod 313 and the second threaded rod 66 can rise and fall synchronously. This is because the first threaded rod 313 and the second threaded rod 66 need to rise only after the movable mold 2 and the fixed mold 1 are closed, so the timing of rising is the same, so only one gear 642 is needed to drive the first gear ring 314 and the second gear ring 65 respectively. Since the vane pump 641 needs to be driven by liquid, and a cooling pipeline is provided on the movable mold 2, the vane pump 641 can be connected to the cooling pipeline, and a reversing valve is provided between the vane pump 641 and the cooling pipeline. When the vane pump 641 needs to be operated, the reversing valve is used to reverse the direction, so that the coolant in the cooling pipeline flows into the vane pump 641, so that the vane pump 641 rotates normally.

[0055] Reference Figure 3 An electromagnet 631 is provided on one side of the bottom of the lifting frame 63, and the locking claw 61 can be attracted and rotated by the electromagnet 631 after being energized.

[0056] Before the electromagnet 631 is energized, the lifting frame 63 descends in the vertical direction, so that the fixing rod 62 and the locking claw 61 are disengaged. Then, after the electromagnet 631 is energized, the locking claw 61 hinged at the lower part of the lifting frame 63 can rotate. When the movable mold 2 rises from the fixed mold 1, the fixing rod 62 will not hinder the locking claw 61, thereby ensuring that the movable mold 2 can rise smoothly.

[0057] Working principle: when the heat dissipation shell 5 is die-casted, the movable mold 2 descends in the vertical direction. Before the movable mold 2 contacts the fixed mold 1, the buffer block 32 will first contact the receiving plate 4 arranged on the fixed mold 1, avoiding the wear caused by the direct contact between the end face of the fixed mold 1 and the end face of the movable mold 2. After the buffer block 32 contacts the receiving plate 4, as the movable mold 2 continues to move, the buffer block 32 slides into the buffer groove 311 in the vertical direction, and the hydraulic oil on the lower side of the buffer groove 311 flows to the upper side of the buffer groove 311 through the middle section of the buffer groove 311. In this way, the hydraulic oil flowing in the buffer groove 311 can push the pressing plate 34 on the upper side of the middle section of the buffer groove 311 to rise, and the first spring 33 arranged between the pressing plate 34 and the upper end of the buffer sleeve 31 is gradually squeezed by the rising pressing plate 34. Since the cross-section of the middle section of the buffer groove 311 is smaller than the upper opening cross-section and The lower opening cross-section of the buffer groove 311, when the hydraulic oil on the lower side of the middle section of the buffer groove 311 passes through the middle section of the buffer groove 311, the hydraulic oil is overflowed by the middle section of the buffer groove 311, so that the speed at which the buffer block 32 retracts into the buffer sleeve 31 is slowed down. At the same time, since a first spring 33 is provided on one side of the pressing plate 34, as the buffer block 32 slides into the buffer sleeve 31, the first spring 33 on one side of the pressing plate 34 is gradually squeezed, and the elastic force of the first spring 33 gradually increases, so that the speed at which the buffer block 32 slides into the buffer sleeve 31 is gradually reduced, thereby achieving a deceleration effect. When the preset program for controlling the movement of the movable mold 2 fails, the buffering effect of the above-mentioned buffer unit 3 can avoid accidental collision between the movable mold 2 and the fixed mold 1, thereby ensuring the safety of the movable mold 2 and the fixed mold 1 during daily operation, and also reducing the amount of wear between the movable mold 2 and the fixed mold 1 when in contact.

[0058] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A heat dissipation housing die-casting device, comprising a fixed die (1) and a movable die (2); It is characterized in that A buffer unit (3) is arranged on the outer periphery of the movable mold (2), and the buffer unit (3) comprises a buffer sleeve (31) arranged in the vertical direction, a buffer groove (311) is provided in the buffer sleeve (31) along the vertical direction, the upper opening and the lower opening of the buffer groove (311) have large cross-sections, and the middle section of the buffer groove (311) has a small cross-section, and a buffer block (32) is arranged at the lower part of the buffer groove (311) to slide in the vertical direction, the lower end of the buffer block (32) protrudes from the lower opening of the buffer groove (311), and slides in the vertical direction at the upper part of the middle section of the buffer sleeve (31). A pressing plate (34) is provided, hydraulic oil is provided in a buffer groove (311) between the buffer block (32) and the pressing plate (34), a first gap exists between the pressing plate (34) and the upper end of the buffer sleeve (31), a first spring (33) is provided in the first gap along the vertical direction, two ends of the first spring (33) are respectively fixedly connected to the pressing plate (34) and the upper end of the buffer sleeve (31), a receiving plate (4) is provided on the upper part of the fixed mold (1), and before the movable mold (2) and the fixed mold (1) are closed, the lower end of the buffer block (32) first contacts the receiving plate (4).

2. The heat dissipation housing die-casting equipment according to claim 1, characterized in that: The buffer sleeve (31) can move in a vertical direction, and has a highest position and a lowest position on a moving path of the buffer sleeve (31). Before the movable mold (2) contacts the fixed mold (1), the buffer sleeve (31) is in the lowest position. When the movable mold (2) contacts the fixed mold (1), the position of the buffer sleeve (31) remains unchanged, and the first spring (33) is in a compressed state. After the movable mold (2) contacts the fixed mold (1), the buffer sleeve (31) rises in a vertical direction to the highest position, and the first spring (33) is in an initial state.

3. The heat dissipation housing die-casting equipment according to claim 1, characterized in that: A circular groove is provided at the center of the receiving plate (4), and a suction cup (11) is arranged in the circular groove. The opening of the suction cup (11) is vertically upward. When the buffer block (32) contacts the receiving plate (4), the suction cup (11) absorbs the lower part of the buffer block (32).

4. The heat dissipation housing die-casting equipment according to claim 1, characterized in that: A vent groove (12) is provided on the fixed mold (1), one end of the vent groove (12) is arranged at the rear of the suction cup (11) and is communicated with the opening of the suction cup (11), the other end of the vent groove (12) passes through the side wall of the fixed mold (1), and a valve body (13) is provided on the end of the vent groove (12) passing through the side wall of the fixed mold (1). When the movable mold (2) and the fixed mold (1) are closed, the valve body (13) is in a closed state, and before the movable mold (2) and the fixed mold (1) are separated, the valve body (13) is opened.

5. The heat dissipation housing die-casting equipment according to claim 1, characterized in that: A support plate (315) is horizontally arranged above the buffer sleeve (31), and the support plate (315) is fixedly arranged on the side wall of the movable mold (2). A lifting plate (312) is fixedly arranged on the upper part of the buffer sleeve (31), and a first threaded rod (313) is rotatably arranged on the upper part of the lifting plate (312) along the vertical direction. The first threaded rod (313) penetrates the support plate (315) along the vertical direction and slides with the support plate (315). A groove is opened on the side wall of the first threaded rod (313) along the axial direction of the first threaded rod (313), and the first threaded rod (313) is key-connected with the support plate (315) through the groove. A first toothed ring (314) is sleeved around the first threaded rod (313) on the upper part of the support plate (315), and the first toothed ring (314) is threadedly engaged with the first threaded rod (313).

6. The heat dissipation housing die-casting equipment according to claim 5, characterized in that: A locking unit (6) is provided on the movable mold (2) and the fixed mold (1), and the locking unit (6) comprises a fixing plate (67) fixedly arranged horizontally on the side wall of the fixed mold (1); a lifting frame (63) movable in a vertical direction is provided on the side of the movable mold (2); a driving unit (64) for driving the lifting frame (63) to move up and down is provided on the upper part of the lifting frame (63); a locking claw (61) is hingedly connected to the lower part of the lifting frame (63); the locking claw (61) is engaged with a fixing rod (62), and the lower end surface of the locking claw (61) is in an inclined structure.

7. The heat dissipation housing die-casting equipment according to claim 6, characterized in that: A second threaded rod (66) is vertically arranged on the upper part of the lifting frame (63), and a fixing plate (67) is horizontally fixedly arranged on the side wall of the movable mold (2). The second threaded rod (66) passes through the fixing plate (67) in the vertical direction and is slidably matched with the fixing plate (67), and the second threaded rod (66) is key-connected with the fixing plate (67). A second toothed ring (65) is arranged on the upper part of the fixing plate (67), and the second toothed ring (65) is sleeved on the outside of the second threaded rod (66), and the second toothed ring (65) is threadedly matched with the second threaded rod (66).

8. The heat dissipation housing die-casting equipment according to claim 6, characterized in that: A tension sleeve (68) is fixedly arranged on the upper part of the lifting frame (63) in the vertical direction, and a second threaded rod (66) penetrates into the tension sleeve (68) from the upper part of the tension sleeve (68) and slides with the tension sleeve (68). A tension plate (682) is fixedly arranged at the bottom of the second threaded rod (66), and the tension plate (682) is located in the tension sleeve (68) and slides with the tension sleeve (68). A second gap is present between the tension plate (682) and the upper part of the tension sleeve (68), and a second spring (681) is vertically arranged in the second gap, and the two ends of the second spring (681) are respectively fixedly arranged on the upper part of the tension plate (682) and the tension sleeve (68).

9. The heat dissipation housing die-casting equipment according to claim 7, characterized in that: The driving unit (64) comprises a vane pump (641) and a gear (642). The gear (642) is rotatably arranged on a fixed plate (67). The gear (642) is respectively meshed with a first gear ring (314) and a second gear ring (65). A vane pump (641) for driving the gear (642) to rotate is arranged at the lower part of the gear (642).

10. The heat dissipation housing die-casting equipment according to claim 6, characterized in that: An electromagnet (631) is arranged on one side of the bottom of the lifting frame (63), and the locking claw (61) can be attracted and rotated by the electromagnet (631) after being energized.

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