A die casting machine with cooling circulation for automobile refrigerant side support production

Abstract

The application relates to the technical field of automobile accessory die casting, in particular to a die casting machine with cooling circulation for automobile refrigerant side bracket production, which comprises a die casting machine frame, a molten material hopper is arranged above the die casting machine frame, an injection device is arranged on one side of the die casting machine frame, a fixed mold assembly and a movable mold assembly are arranged on the upper surface of the die casting machine frame, the fixed mold assembly is fixedly installed on the side close to the injection device, and a movable mold driving assembly is arranged on one side of the movable mold assembly. The die casting machine has the beneficial effects that: the movable mold assembly and the fixed mold assembly are designed, the flow channel I and the flow channel II are optimized, the workpiece blank block formed through die casting is more fine, the error in the later processing is reduced, and according to the thin-wall area and the thick-wall area formed after the flow channel I and the flow channel II are cast, the movable mold cooling deep flow channel, the movable mold cooling center deep flow channel, the movable mold cooling center shallow flow channel and the fixed mold cooling flow channel are designed, the thick-wall area is preferentially cooled, and the temperature difference between the thick-wall area and the thin-wall area is reduced.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts die casting technology, specifically relating to a die casting machine with cooling circulation for the production of automotive refrigerant side brackets. Background Technology

[0002] The automotive refrigerant side bracket, also known as a refrigerant pipe fixing bracket or air conditioning pipe clamp, primarily functions to securely fix two aluminum refrigerant pipes to the vehicle's longitudinal beams or subframe. As a core load-bearing component for automotive refrigerant pipes, the refrigerant side bracket must simultaneously meet the "three high standards" of high structural strength, high assembly precision, and high production efficiency. Currently, the mainstream production model in the industry is a step-by-step process of "die casting, manual transfer, machining for deburring, CNC drilling and tapping, and manual inspection," using mostly general-purpose equipment, without a dedicated manufacturing system for refrigerant side brackets. When refrigerant side brackets are produced using ordinary die casting machines, problems such as internal porosity, cold shut defects, and incomplete filling of thin-walled areas can occur due to insufficient fluidity of the aluminum alloy. To ensure the fluidity of the aluminum alloy, existing technical solutions generally involve increasing the die casting pressure or preheating the mold during the die casting process, extending the holding time, reducing local temperature differences in the casting, and lowering the risk of cold shut. However, this leads to problems such as low cooling efficiency and unstable local cooling temperatures after the die casting machine finishes casting.

[0003] A Chinese patent document with publication number CN117226070A proposes a die-casting machine for producing automotive braking system parts. It solves the above-mentioned technical problems by using a cooling assembly to reduce the temperature around the die-casting mold through the circulation of coolant and controlling the flow rate of coolant based on temperature sensors. However, in the above method, the clamping area of ​​the refrigerant side bracket is the thinnest and the bolt boss is the thickest. Once the water cooling channel is close to the thin-walled area, that area will shrink first. The aluminum liquid feeding path is cooled in advance, resulting in poor fluidity. On the contrary, secondary shrinkage cavities appear in the thick-walled area, ultimately affecting the quality of the refrigerant side bracket casting.

[0004] Therefore, the present invention proposes a die-casting machine with cooling circulation for the production of automotive refrigerant side brackets, in order to solve the problems mentioned in the background art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a die-casting machine with cooling circulation for the production of automotive refrigerant side brackets, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a die-casting machine with cooling circulation for producing automotive refrigerant side brackets, comprising a die-casting frame, a molten hopper disposed above the die-casting frame, an injection device disposed on one side of the die-casting frame, a fixed mold assembly and a moving mold assembly disposed in the middle of the upper surface of the die-casting frame, the fixed mold assembly being fixedly installed on the side near the injection device, and a moving mold drive assembly disposed on one side of the moving mold assembly.

[0007] Preferably, a fixed mold rear cover plate is fixedly installed on one side surface of the fixed mold assembly, a flow channel is opened on the inner wall of the fixed mold assembly near the moving mold assembly, a first sealing ring is fixedly installed on the side surface of the fixed mold assembly near the moving mold assembly, a second sealing groove is provided on the outer side of the first sealing ring, a mold closing locking sleeve is distributed between the second sealing groove and the first sealing ring, and the mold closing locking sleeve is fixedly installed on the side surface of the fixed mold assembly.

[0008] Preferably, the moving mold assembly has a flow channel two on the inner wall of the side near the fixed mold assembly, and a first sealing groove is formed on the surface of the moving mold assembly near the fixed mold assembly. A second sealing ring is provided on the outer side of the first sealing groove. The second sealing ring is fixedly installed on the side surface of the moving mold assembly. A locking movable tube is distributed between the second sealing ring and the first sealing groove. The position of the locking movable tube corresponds to the position of the mold closing locking sleeve.

[0009] Preferably, one side of the injection device is fixedly connected to the side surface of the fixed mold rear cover plate, and a main casting groove is provided in the middle of the inner wall of the other side of the fixed mold assembly. The injection nozzle of the injection device penetrates the inner wall of the fixed mold rear cover plate and communicates with the main casting groove. A casting branch port is provided on the side wall of the main casting groove. The interior of the flow channel one has a main casting port and an auxiliary casting nozzle. The casting branch port is respectively connected to one side of the main casting port and the auxiliary casting nozzle.

[0010] Preferably, an auxiliary casting trough is provided on one side of the main casting trough, and a return port is provided on the side wall of the auxiliary casting trough. The return port is connected to the other side of the auxiliary casting nozzle. An extrusion pad is slidably installed inside the auxiliary casting trough, and an auxiliary telescopic rod for driving the extrusion pad to slide is fixedly installed on the outer side of the fixed mold rear cover plate.

[0011] Preferably, the inner wall of the fixed mold assembly is further provided with a fixed mold cooling channel and a cooling water return channel. The fixed mold cooling channel is located on the outer side of the channel. The side wall of the cooling water return channel is provided with a cooling water return port, which communicates with the fixed mold cooling channel. A cooling water outlet pipe is also fixedly installed on the side wall of the fixed mold cooling channel. The cooling water outlet pipe passes through the side wall of the fixed mold assembly. The mold closing locking sleeve communicates with the fixed mold cooling channel.

[0012] Preferably, a heat dissipation copper pillar is fixedly installed on the inner surface of the fixed mold cooling channel, and the position of the heat dissipation copper pillar corresponds to the position of the mold closing locking sleeve. A heat dissipation fin is provided on the side of the fixed mold cooling channel near the channel. A locking protrusion is fixedly installed on one side surface of the heat dissipation fin, and an elastic pad is fixedly installed on the other side surface of the heat dissipation fin. One end of the elastic pad is fixedly connected to the side wall of the fixed mold cooling channel. The locking protrusion is distributed on one side of the heat dissipation copper pillar. A pressure cam assembly is also rotatably installed inside the fixed mold cooling channel.

[0013] Preferably, the inner wall of the moving mold assembly near the rear cover plate of the moving mold is provided with a W-shaped cooling water distribution channel. The inner wall of the moving mold assembly is also provided with a moving mold cooling deep channel, a moving mold cooling center deep channel, and a moving mold cooling center shallow channel. The moving mold cooling center shallow channel is located inside the moving mold cooling center deep channel, and the moving mold cooling center deep channel is located inside the moving mold cooling center shallow channel. Through valve pipes are fixedly installed on both sides of the moving mold cooling center shallow channel. A movable valve core is slidably installed inside the through valve pipe. A spring is fixedly installed between the outer surface of one end of the movable valve core and the side surface of the through valve pipe. An adjusting block is provided between the through valve pipes.

[0014] Preferably, the W-shaped cold water distribution channel is provided with cold water outlets inside, which are respectively connected to the moving mold cooling deep channel and the moving mold cooling center deep channel. A cooling water outlet is provided on one side of the W-shaped cold water distribution channel, and a cooling water outlet is provided inside the cooling water outlet. The cooling water outlet is connected to the interior of the moving mold cooling center shallow channel. A cold water injection pipe and a cooling water main pipe are fixedly installed on the side wall of the moving mold rear cover plate. The cold water injection pipe is connected to the interior of the W-shaped cold water distribution channel, and the cooling water main pipe is connected to the interior of the cooling water outlet channel.

[0015] Preferably, one end of the locking movable tube is connected to the interior of the moving mold cooling deep flow channel, and the other end of the locking movable tube is sleeved with a movable tube head. The side wall of the movable tube head is provided with a locking groove, and the side wall of the locking movable tube is provided with a water outlet groove. A reset spring seat is fixedly installed inside the locking movable tube, and one end of the reset spring seat is fixedly connected to the inner surface of the movable tube head.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By designing the moving mold assembly and the fixed mold assembly, and optimizing flow channel one and flow channel two, the die-cast workpiece blanks are made more refined, reducing errors in later processing. Furthermore, based on the thin-walled and thick-walled areas formed after casting by flow channel one and flow channel two, a moving mold cooling deep flow channel, a moving mold cooling center deep flow channel, a moving mold cooling center shallow flow channel, and a fixed mold cooling flow channel are designed to prioritize cooling the thick-walled area, reducing the temperature difference between the thick-walled and thin-walled areas. A locking movable pipe is designed to cooperate with the mold closing locking sleeve, forming a complete cooling water flow circulation and also serving to position the mold. In addition, a through valve pipe is designed to make the cooling water in the moving mold cooling deep flow channel, the moving mold cooling center deep flow channel, and the moving mold cooling center shallow flow channel interconnected, further reducing the temperature difference and solving the problem that the thin-walled area cools first, causing the aluminum liquid to be cooled prematurely and resulting in poor fluidity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall internal structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the overall structure of the moving mold assembly, the fixed mold assembly, and the injection equipment of the present invention;

[0022] Figure 5 This is a schematic diagram of the workpiece blank structure before demolding according to the present invention;

[0023] Figure 6 This is a schematic diagram of the workpiece blank structure after demolding according to the present invention;

[0024] Figure 7 This is a schematic diagram of the overall structure of the fixed mold assembly of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall structure of the moving mold assembly of the present invention;

[0026] Figure 9 This is a schematic diagram of the internal structure of the mold assembly of the present invention;

[0027] Figure 10 This is a schematic diagram of the internal structure of the mold assembly of the present invention on the other side;

[0028] Figure 11 This is a schematic diagram of the internal structure of the moving mold assembly of the present invention;

[0029] Figure 12 This is a schematic diagram of the internal structure of the moving mold assembly of the present invention on the other side;

[0030] Figure 13 This is a schematic diagram of the internal structure of the moving mold cooling deep channel, the moving mold cooling center deep channel, and the moving mold cooling center shallow channel of the present invention.

[0031] Figure 14 This is a schematic diagram of the through-valve pipe of the present invention in its fully open state;

[0032] Figure 15 This is a schematic diagram of the through-valve pipe of the present invention in its minimum open state;

[0033] Figure 16 This is a schematic diagram of the fixed mold assembly and moving mold assembly in the mold closing state of the present invention;

[0034] Figure 17 This is a schematic diagram of the overall structure of the locking active tube of the present invention;

[0035] Figure 18 This is a schematic diagram of the internal structure of the locking active tube of the present invention;

[0036] Figure 19 This is a schematic diagram of the overall internal structure of the fixed mold assembly after the locking active tube and the mold closing locking sleeve of the present invention are engaged.

[0037] In the diagram: 1. Die-casting frame; 2. Melting hopper; 3. Injection molding equipment; 4. Fixed mold assembly; 41. Fixed mold rear cover plate; 42. First sealing ring; 43. Second sealing groove; 44. Mold closing locking sleeve; 45. Runner 1; 451. Main sprue; 452. Auxiliary sprue; 46. Main casting channel; 461. Casting branch port; 47. Auxiliary casting channel; 471. Return port; 472. Auxiliary telescopic rod; 473. Extrusion gasket; 48. Cooling water outlet pipe; 49. Fixed mold cooling runner; 491. Cooling water return runner; 492. Cooling water return port; 493. Heat dissipation copper pillar; 494. Heat dissipation fins; 4941. Locking protrusion; 4942. Elastic gasket; 495. Pressure cam assembly; 5. Moving mold assembly; 51. 51. Moving mold rear cover plate; 52. First sealing groove; 53. Second sealing ring; 54. Locking movable tube; 541. Movable tube head; 5411. Locking groove; 542. Water outlet groove; 543. Reset spring seat; 55. Flow channel two; 56. W-shaped cold water flow channel; 561. Cold water flow outlet; 562. Cold water injection pipe; 57. Cooling water outlet groove; 571. Cooling water outlet; 572. Cooling water main pipe; 58. Moving mold cooling deep flow channel; 581. Moving mold cooling center deep flow channel; 582. Moving mold cooling center shallow flow channel; 583. Heat dissipation pad one; 584. Heat dissipation pad two; 59. Through valve pipe; 591. Movable valve core; 5911. Spring; 592. Adjusting block; 6. Moving mold drive assembly; 7. Workpiece blank. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] Please see Figures 1 to 9This invention provides a technical solution: a die-casting machine with cooling circulation for producing automotive refrigerant side brackets, comprising a die-casting frame 1, a molten hopper 2 disposed above the die-casting frame 1, an injection device 3 disposed on one side of the die-casting frame 1, the injection device 3 being disposed below the molten hopper 2, the aluminum liquid outlet of the molten hopper 2 being fixedly connected to the injection port of the injection device 3, a fixed mold assembly 4 and a moving mold assembly 5 disposed in the middle of the upper surface of the die-casting frame 1, the fixed mold assembly 4 being fixedly installed on the side near the injection device 3, and a moving mold drive assembly 6 disposed on one side of the moving mold assembly 5; the moving mold drive assembly 6 being fixedly installed on one side of the die-casting frame 1, and a limit slide rail disposed above the die-casting frame 1, the moving mold... The drive assembly 6 can push the moving mold assembly 5 to move on the slide rail. After the moving mold assembly 5 and the fixed mold assembly 4 are closed, the molten hopper 2 is used to melt the aluminum material and inject it into the mold composed of the fixed mold assembly 4 and the moving mold assembly 5 under high pressure through the injection equipment 3. A fixed mold rear cover plate 41 is fixedly installed on one side surface of the fixed mold assembly 4. A flow channel 45 is opened on the inner wall of the fixed mold assembly 4 near the moving mold assembly 5. A first sealing ring 42 is fixedly installed on the surface of the fixed mold assembly 4 near the moving mold assembly 5. A second sealing groove 43 is provided on the outer side of the first sealing ring 42. A mold closing locking sleeve 44 is distributed between the second sealing groove 43 and the first sealing ring 42. The mold closing locking sleeve 44 is fixedly installed on the fixed mold assembly 4. On the side surface of mold assembly 4, a flow channel 55 is formed on the inner wall of the moving mold assembly 5 near the fixed mold assembly 4. A first sealing groove 52 is formed on the side surface of the moving mold assembly 5 near the fixed mold assembly 4. A second sealing ring 53 is provided on the outer side of the first sealing groove 52. The second sealing ring 53 is fixedly installed on the side surface of the moving mold assembly 5. A locking movable tube 54 is distributed between the second sealing ring 53 and the first sealing groove 52. The position of the locking movable tube 54 corresponds to the position of the mold closing locking sleeve 44. The position and size of the first sealing groove 52 are adapted to the first sealing ring 42. The position and size of the second sealing groove 43 are adapted to the second sealing ring 53. When the fixed mold assembly 4 and the moving mold assembly 5 are closed... The first sealing ring 42 is inserted into the first sealing groove 52, and the second sealing ring 53 is inserted into the second sealing groove 43 to form a double seal. The locking movable tube 54 is inserted into the mold closing locking sleeve 44 when the moving mold assembly 5 and the fixed mold assembly 4 are closed to play a positioning role. The first flow channel 45 and the second flow channel 55 form a complete die casting flow channel to die cast the workpiece blank 7. Compared with the workpiece blank of traditional mold die casting, the workpiece blank 7 has an irregular plate structure, which realizes the fixed connection between the bracket and the refrigerant related parts, and makes it easier to assist in positioning and adjustment during bracket assembly. The subsequent processing only requires thread hole processing and grinding, which improves the efficiency of subsequent processing and reduces the error of traditional processing.

[0041] One side of the injection device 3 is fixedly connected to the side surface of the fixed mold rear cover plate 41. A main casting groove 46 is formed in the middle of the inner wall of the other side of the fixed mold assembly 4. The injection nozzle of the injection device 3 penetrates the inner wall of the fixed mold rear cover plate 41 and communicates with the main casting groove 46. A casting branch port 461 is formed on the side wall of the main casting groove 46. A main casting port 451 and an auxiliary casting nozzle 452 are distributed inside the flow channel 45. The casting branch port 461 communicates with one side of both the main casting port 451 and the auxiliary casting nozzle 452. In this embodiment, the molten material hopper 2 melts... Molten aluminum is injected into the main casting tank 46 through the injection device 3, and is then injected through the casting branch port 461 into the aluminum liquid flow channel composed of the main casting port 451 and the auxiliary casting nozzle 452. The main casting port 451 is spread out to ensure uniform flow of molten aluminum during casting. The auxiliary casting nozzle 452 is mainly for thin-walled areas, matching the filling requirements of thin-walled parts of the support, which improves the fluidity of the aluminum alloy, reduces the porosity defects inside the casting, solves the problem of incomplete filling of thin-walled parts of the support, and ensures rapid and uniform filling of molten aluminum alloy.

[0042] Example 2

[0043] Please see Figure 10 Based on Example 1, in order to make the molten aluminum alloy fill the gaps evenly and completely and reduce the generation of defects, this example also proposes that an auxiliary casting tank 47 is provided on one side of the main casting tank 46, and a return port 471 is opened on the side wall of the auxiliary casting tank 47. The return port 471 is connected to the other side of the auxiliary casting nozzle 452. An extrusion pad 473 is slidably installed inside the auxiliary casting tank 47, and an auxiliary telescopic rod 472 for driving the extrusion pad 473 to slide is fixedly installed on the outside of the fixed mold back cover plate 41.

[0044] In this embodiment, the auxiliary casting tank 47 mainly serves as a secondary pressurization and liquid replenishment mechanism. Initially, the extrusion pad 473 is positioned on one side of the return port 471. During the die casting process, the auxiliary casting tank 47 acts as a small pulse chamber behind the auxiliary casting nozzle 452. The space formed by the extrusion pad 473 occupies one-third of the total volume of the auxiliary casting tank 47. During the injection process, the molten aluminum accumulates in the space blocked by the extrusion pad 473 inside the auxiliary casting tank 47. When the molten aluminum flows to the thin-walled end in the later stage of injection, the molten aluminum accumulated inside the auxiliary casting tank 47 is suddenly released through the return port 471 under the pressure of the extrusion pad 473 pushed by the auxiliary telescopic rod 472. This instantly replenishes and pressurizes the molten aluminum inside the flow channel, achieving secondary injection and propulsion of the molten aluminum at the end, ensuring the complete filling of the casting.

[0045] Example 3

[0046] Please see Figures 11 to 19Based on Embodiment 2, in order to reduce the temperature difference between the thin-walled and thick-walled areas of the workpiece during cooling and to avoid the problem of the thin-walled area cooling first, causing the aluminum liquid to cool prematurely and resulting in poor fluidity, this embodiment also proposes that the inner wall of the fixed mold assembly 4 is provided with a fixed mold cooling channel 49 and a cooling water return channel 491. The fixed mold cooling channel 49 is located outside the channel 45, and the side wall of the cooling water return channel 491 is provided with a cooling water return port 492, which communicates with the fixed mold cooling channel 49. The side wall is also fixedly installed with a cooling water outlet pipe 48, which penetrates the side wall of the fixed mold assembly 4. The mold closing locking sleeve 44 is connected to the fixed mold cooling channel 49. The cooling water return channel 491 is located at the protruding position of the fixed mold assembly 4. When the fixed mold assembly 4 and the moving mold assembly 5 are closed, it is located outside the thin wall area of ​​the second flow channel 55. The cooling water return port 492 connects the fixed mold cooling channel 49 and the cooling water return channel 491. The fixed mold cooling channel 49 is located outside the first flow channel 45 and mainly cools the part of the casting formed by the first flow channel 45.

[0047] A heat dissipation copper pillar 493 is fixedly installed on the inner surface of the fixed mold cooling channel 49. The position of the heat dissipation copper pillar 493 corresponds to the position of the mold closing locking sleeve 44. A heat dissipation fin 494 is provided inside the fixed mold cooling channel 49 near the first channel 45. A locking protrusion 4941 is fixedly installed on one side surface of the heat dissipation fin 494, and an elastic pad 4942 is fixedly installed on the other side surface of the heat dissipation fin 494. One end of the elastic pad 4942 is fixedly connected to the side wall of the fixed mold cooling channel 49. The locking protrusion 4941 is distributed on one side of the heat dissipation copper pillar 493. A pressure cam assembly 495 is also rotatably installed inside the fixed mold cooling channel 49. The position of the heat dissipation copper pillar 493 corresponds to that of the mold closing locking sleeve 44. It is mainly used to abut against the locking movable tube 54 inserted into the mold closing locking sleeve 44 when the mold is closed. It also increases the contact area of ​​the cooling water. The heat dissipation fin 494 is used to increase the contact area of ​​the cooling water near the first channel 45. The heat exchange area on one side of 45 has a locking protrusion 4941 that mainly serves to restrict the flow of cooling water by engaging the locking groove 5411 during aluminum liquid injection and the initial cooling stage, preventing the aluminum liquid replenishment path from being cooled prematurely. The elastic pad 4942 mainly serves to connect the heat dissipation fins 494. The outer wall of the mold back cover plate 41 is also fixedly equipped with a motor that drives the pressure cam assembly 495 to rotate. Its main function is to press the heat dissipation fins 494 by driving the pressure cam assembly 495 to rotate. After the aluminum liquid is injected, the locking protrusion 4941 releases the flow restriction on the locking groove 5411, accelerating the flow of cooling water. When the mold is closed, the pressure cam assembly 495 first presses the heat dissipation fins 494. After the locking movable tube 54 is inserted, the pressure cam assembly 495 is raised, causing the locking protrusion 4941 to engage in the locking groove 5411, which also plays a certain locking role in the mold closing.

[0048] A W-shaped cooling water distribution channel 56 is formed on the inner wall of the moving mold assembly 5 near the rear cover plate 51 of the moving mold. The inner wall of the moving mold assembly 5 is also provided with a moving mold cooling deep channel 58, a moving mold cooling center deep channel 581, and a moving mold cooling center shallow channel 582. The moving mold cooling center shallow channel 582 is located inside the moving mold cooling center deep channel 581, and the moving mold cooling center deep channel 581 is located inside the moving mold cooling center shallow channel 582. Through valve pipes 59 are fixedly installed on both sides of the moving mold cooling center shallow channel 582, and movable valve cores 5 are slidably installed inside the through valve pipes 59. 91. A spring 5911 is fixedly installed between the outer surface of one end of the movable valve core 591 and the side surface of the through valve tube 59. An adjusting block 592 is provided between the through valve tubes 59. The adjusting block 592 is rotatably installed on the inner wall of the moving mold assembly 5. A cold water outlet 561 is provided inside the W-shaped cold water distribution channel 56. The cold water outlet 561 is connected to the moving mold cooling deep channel 58 and the moving mold cooling center deep channel 581 respectively. A cooling water outlet 57 is provided on one side of the W-shaped cold water distribution channel 56. A cooling water outlet 571 is provided inside the cooling water outlet 57. The cooling water outlet 57 is connected to the cooling water outlet. The inlet 571 is internally connected to the shallow flow channel 582 of the moving mold cooling center. A cold water injection pipe 562 and a cooling water main pipe 572 are fixedly installed on the side wall of the moving mold rear cover plate 51. The cold water injection pipe 562 is internally connected to the W-shaped cold water diversion channel 56. The cooling water main pipe 572 is internally connected to the cooling water outlet channel 57. One end of the locking movable pipe 54 is internally connected to the deep flow channel 58 of the moving mold cooling center. The other end of the locking movable pipe 54 is externally sleeved with a movable pipe head 541. A locking groove 5411 is opened on the side wall of the movable pipe head 541. A water outlet groove 542 is opened on the side wall of the locking movable pipe 54. A reset spring seat 543 is fixedly installed inside the locking movable tube 54, and one end of the reset spring seat 543 is fixedly connected to the inner surface of the movable tube head 541; a heat dissipation pad 1 583 is also installed on the inner side wall of the moving mold cooling center deep flow channel 581, and a heat dissipation pad 2 584 is also installed in the middle of the moving mold cooling center deep flow channel 581. With the movement of the movable valve core 591, the heat dissipation pad 1 583 and the heat dissipation pad 2 584 can be squeezed and deformed respectively. The repeated movement of the heat dissipation pad 1 583 and the heat dissipation pad 2 584 can generate turbulence in the cooling water and reduce local temperature differences.

[0049] In this embodiment, the moving mold cooling deep runner 58 and the moving mold cooling center deep runner 581 are mainly located on the outer and inner sides of the second runner 55 to cool the thick-walled area of ​​the workpiece blank 7. The moving mold cooling center shallow runner 582 is mainly located on the back side of the second runner 55 to cool the thin-walled area of ​​the workpiece blank 7. The W-shaped cold water distribution channel 56 has a meandering design. Cold water enters through the cold water injection pipe 562 and is dispersed into the moving mold cooling deep runner 58 and the moving mold cooling center deep runner 581 through the evenly distributed cold water distribution ports 561, so that the thick-walled area receives cooling water preferentially. A motor that drives the adjustment block 592 to rotate is installed on the rear side of the moving mold rear cover plate 51. When the cooling water... Upon entry, the motor drives the regulating block 592 to rotate, compressing the movable valve core 591 installed inside the through valve pipe 59. This compresses the spring 5911, increasing the flow rate inside the through valve pipe 59. This connects the moving mold cooling deep flow channel 58 with the moving mold cooling center shallow flow channel 582 and the moving mold cooling center deep flow channel 581, allowing cooling water to enter the moving mold cooling center shallow flow channel 582 from the moving mold cooling deep flow channel 58 and the moving mold cooling center deep flow channel 581. This reduces the temperature difference between the thick-walled and thin-walled areas of the casting. Additionally, temperature sensors can be installed inside the moving mold cooling deep flow channel 58, the moving mold cooling center deep flow channel 581, and the moving mold cooling center shallow flow channel 582 to adjust the flow rate. Block 592 adjusts the height of the movable valve core 591 within the through valve tube 59, and adjusts the flow rate according to temperature changes. Cooling water enters the shallow flow channel 582 of the moving mold cooling center, then enters the cooling water outlet groove 57 through the cooling water outlet 571, and finally exits through the cooling water main pipe 572. In addition, when the mold is closed, the locking movable tube 54 is inserted into the mold closing locking sleeve 44 and enters the fixed mold cooling flow channel 49. At this time, the heat dissipation copper pillar 493 squeezes the movable tube head 541, causing the return spring seat 543 to be compressed. The locking groove 5411 and the water outlet groove 542 are aligned, opening the flow of cooling water into the through valve tube 59. Initially, the locking protrusion 4941 plays a certain role in sealing. The blocking function prevents premature cooling inside the flow channel 45 and avoids premature cooling of the aluminum liquid replenishment path. After a period of time after the aluminum liquid is injected, the locking protrusion 4941 releases the flow restriction on the locking groove 5411, accelerating the flow of cooling water and accelerating the cooling inside the flow channel 45. The cooling water enters the cooling water return channel 491 through the cooling water return port 492 and is finally discharged through the cooling water outlet pipe 48. The cooling flow path sequence is first the thick-walled area of ​​the workpiece, then the thin-walled area, and finally the casting gate area. During the flow process, the temperature gradually reaches equilibrium, reducing local temperature differences and solving the problem of the thin-walled area cooling first, causing the aluminum liquid replenishment path to be cooled prematurely and resulting in poor fluidity.

[0050] Example 4

[0051] Please see Figures 1 to 19Based on Example 3, this example also proposes a method for using a die-casting machine with cooling circulation for producing automotive refrigerant side brackets, including the following steps:

[0052] Step 1: Mold closing. The moving mold drive assembly 6 pushes the moving mold assembly 5 to move on the slide rail so that the moving mold assembly 5 and the fixed mold assembly 4 close together. Then, the molten hopper 2 melts the aluminum material and injects it into the mold composed of the fixed mold assembly 4 and the moving mold assembly 5 under high pressure through the injection equipment 3. The molten aluminum flows and fills the mold in the flow channel 1 45 and flow channel 2 55 to form a complete die casting flow channel.

[0053] Step 2, secondary pressurization and liquid replenishment: During the injection process, the molten aluminum will accumulate in the space inside the auxiliary casting tank 47 that is blocked by the extrusion pad 473. When the molten aluminum flows to the end of the thin wall in the later stage of injection, the molten aluminum accumulated inside the auxiliary casting tank 47 is suddenly released through the return port 471 under the action of the extrusion pad 473 pushed by the auxiliary telescopic rod 472. This instantly replenishes and pressurizes the molten aluminum inside the flow channel, realizing the secondary injection and propulsion of the molten aluminum at the end, and ensuring that the casting is completely filled.

[0054] Step 3: Cooling is performed. Cold water enters through the cold water injection pipe 562 and is dispersed into the moving mold cooling deep flow channel 58 and the moving mold cooling center deep flow channel 581 through the evenly distributed cold water outlets 561. This allows the thick-walled area to receive cooling water preferentially. When the cooling water enters, the motor drives the regulating block 592 to rotate, squeezing the movable valve core 591 installed inside the through valve pipe 59. This increases the flow rate of the through valve pipe 59, connecting the moving mold cooling deep flow channel 58 with the moving mold cooling center shallow flow channel 582 and the moving mold cooling center deep flow channel 581. This allows the cooling water to enter the moving mold cooling center shallow flow channel 582 from the moving mold cooling deep flow channel 58 and the moving mold cooling center deep flow channel 581, cooling the thin-walled area. The pressure cam assembly 495 works, causing the locking protrusion 4941 to release the flow restriction on the locking groove 5411, accelerating the flow of cooling water. The cooling water enters the fixed mold cooling flow channel 49 through the moving mold cooling deep flow channel 58, accelerating the cooling inside the flow channel 45.

[0055] Step four: The cooling water inside the moving mold cooling deep runner 58 and the moving mold cooling center deep runner 581 enters the moving mold cooling center shallow runner 582 and then enters the cooling water outlet 57 through the cooling water outlet 571, and finally exits through the cooling water main pipe 572. The cooling water inside the fixed mold cooling runner 49 enters the cooling water return runner 491 through the cooling water return port 492, and finally exits through the cooling water outlet pipe 48. This ensures that the cooling flow path sequence is first the thick-walled area of ​​the workpiece, then the thin-walled area, and finally the casting gate area. During the flow process, the temperature gradually decreases evenly, and the workpiece is finally cooled. Then, the moving mold drive assembly 6 drives the moving mold assembly 5 to move backward, open the mold, and remove the cooled workpiece blank 7.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets, comprising a die-casting frame (1), a molten hopper (2) disposed above the die-casting frame (1), and an injection device (3) disposed on one side of the die-casting frame (1), characterized in that: A fixed mold assembly (4) and a moving mold assembly (5) are provided in the middle of the upper surface of the die-casting frame (1). The fixed mold assembly (4) is fixedly installed on the side near the injection equipment (3). A moving mold drive assembly (6) is provided on one side of the moving mold assembly (5). A fixed mold rear cover plate (41) is fixedly installed on one side surface of the fixed mold assembly (4). A flow channel (45) is opened on the inner wall of the fixed mold assembly (4) near the moving mold assembly (5). A first sealing ring (42) is fixedly installed on the surface of the fixed mold assembly (4) near the moving mold assembly (5). A second sealing groove (43) is provided on the outer side, and a mold closing locking sleeve (44) is distributed between the second sealing groove (43) and the first sealing ring (42). A flow channel two (55) is opened on the inner wall of the moving mold assembly (5) near the fixed mold assembly (4). A fixed mold cooling flow channel (49) and a cooling water return channel (491) are also opened on the inner wall of the fixed mold assembly (4). The fixed mold cooling flow channel (49) is located on the outer side of the flow channel one (45). A cooling water return port (492) is provided on the side wall of the cooling water return channel (491). The cooling water return port (492) is connected to the fixed mold cooling flow channel. The flow channel (49) is through, and a cooling water outlet pipe (48) is fixedly installed on the side wall of the fixed mold cooling flow channel (49). The cooling water outlet pipe (48) penetrates the side wall of the fixed mold assembly (4). The mold closing locking sleeve (44) is through the fixed mold cooling flow channel (49). A W-shaped cooling water distribution groove (56) is opened on the inner wall of the moving mold assembly (5) near the moving mold rear cover plate (51). The inner wall of the moving mold assembly (5) is also provided with a moving mold cooling deep flow channel (58), a moving mold cooling center deep flow channel (581), and a moving mold cooling center shallow flow channel (582). The channel (582) is located inside the deep flow channel (581) of the moving mold cooling center, and the deep flow channel (581) of the moving mold cooling center is located inside the shallow flow channel (582) of the moving mold cooling center. A through valve pipe (59) is fixedly installed on each of the two side walls of the shallow flow channel (582) of the moving mold cooling center. A movable valve core (591) is slidably installed inside the through valve pipe (59). A spring (5911) is fixedly installed between the outer surface of one end of the movable valve core (591) and the side surface of the through valve pipe (59). An adjusting block (592) is provided between the through valve pipes (59).

2. The die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 1, characterized in that: The mold closing locking sleeve (44) is fixedly installed on the side surface of the fixed mold assembly (4).

3. The die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 2, characterized in that: The moving mold assembly (5) has a first sealing groove (52) on one side surface near the fixed mold assembly (4). A second sealing ring (53) is provided on the outside of the first sealing groove (52). The second sealing ring (53) is fixedly installed on the side surface of the moving mold assembly (5). A locking movable tube (54) is distributed between the second sealing ring (53) and the first sealing groove (52). The position of the locking movable tube (54) corresponds to the position of the mold closing locking sleeve (44).

4. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 3, characterized in that: One side of the injection device (3) is fixedly connected to the side surface of the fixed mold back cover plate (41). The middle of the inner wall of the other side of the fixed mold assembly (4) is provided with a main casting groove (46). The injection nozzle of the injection device (3) penetrates the inner wall of the fixed mold back cover plate (41) and communicates with the main casting groove (46). The side wall of the main casting groove (46) is provided with a casting branch port (461). The interior of the flow channel (45) is provided with a main casting port (451) and an auxiliary casting nozzle (452). The casting branch port (461) is connected to one side of the main casting port (451) and the auxiliary casting nozzle (452) respectively.

5. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 4, characterized in that: An auxiliary casting trough (47) is provided on one side of the main casting trough (46). A return port (471) is provided on the side wall of the auxiliary casting trough (47). The return port (471) is connected to the other side of the auxiliary casting nozzle (452). An extrusion pad (473) is slidably installed inside the auxiliary casting trough (47). An auxiliary telescopic rod (472) for driving the extrusion pad (473) to slide is fixedly installed on the outer side of the fixed mold back cover plate (41).

6. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 1, characterized in that: A heat dissipation copper pillar (493) is fixedly installed on the inner surface of the fixed mold cooling channel (49). The position of the heat dissipation copper pillar (493) corresponds to the position of the mold closing locking sleeve (44). A heat dissipation fin (494) is provided on the side of the fixed mold cooling channel (49) near the channel one (45). A locking protrusion (4941) is fixedly installed on one side surface of the heat dissipation fin (494). An elastic pad (4942) is fixedly installed on the other side surface of the heat dissipation fin (494). One end of the elastic pad (4942) is fixedly connected to the side wall of the fixed mold cooling channel (49). The locking protrusion (4941) is distributed on one side of the heat dissipation copper pillar (493). A pressure cam assembly (495) is also rotatably installed inside the fixed mold cooling channel (49).

7. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 1, characterized in that: The W-shaped cold water distribution channel (56) is provided with a cold water outlet (561) inside. The cold water outlet (561) is connected to the moving mold cooling deep channel (58) and the moving mold cooling center deep channel (581) respectively. A cooling water outlet channel (57) is provided on one side of the W-shaped cold water distribution channel (56). A cooling water outlet (571) is provided inside the cooling water outlet channel (57). The cooling water outlet (571) is connected to the interior of the moving mold cooling center shallow channel (582). A cold water injection pipe (562) and a cooling water outlet main pipe (572) are fixedly installed on the side wall of the moving mold rear cover plate (51). The cold water injection pipe (562) is connected to the interior of the W-shaped cold water distribution channel (56). The cooling water outlet main pipe (572) is connected to the interior of the cooling water outlet channel (57).

8. A die-casting machine with cooling circulation for producing automotive refrigerant side brackets according to claim 3, characterized in that: One end of the locking movable tube (54) is connected to the interior of the moving mold cooling deep flow channel (58). The other end of the locking movable tube (54) is sleeved with a movable tube head (541). The side wall of the movable tube head (541) is provided with a locking groove (5411). The side wall of the locking movable tube (54) is provided with a water outlet groove (542). A reset spring seat (543) is fixedly installed inside the locking movable tube (54). One end of the reset spring seat (543) is fixedly connected to the inner surface of the movable tube head (541).

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