Die-casting die for ultrathin lamp frame bracket of automobile

Abstract

The invention relates to the field of die-casting dies, and discloses an automobile ultrathin lamp frame support die-casting die which comprises a fixed die frame, a movable die frame, a fixed die core, a movable die core, square iron and a movable die bottom plate. A left cavity and a right cavity of the mold cavity are respectively provided with a bottom transverse bulge, an outer curved bulge, a front vertical bulge, a longitudinal extension bulge, a rear vertical bulge, a cross curved bulge, a lower folding bulge and an upper folding bulge on the movable mold core, the mold sprue is arranged in the middle of the bottom of the movable mold core, and the sprue is communicated with the bottom transverse bulges of the left cavity and the right cavity through a sub-runner. The pouring gate is placed on the transverse side and the flat side of the product, so that the phenomenon of filling air trapping or molten aluminum rewinding in the pouring process of molten aluminum is reduced; molten aluminum flows in the sequence from the bottom transverse protrusion, the front vertical protrusion, the lower folding protrusion to the longitudinal extension protrusion, so that inflow water at the front vertical protrusion and the lower folding protrusion can be smoothly combined into one strand at the longitudinal extension protrusion and synchronously filled upwards, the filling smoothness is guaranteed, and the product forming quality is improved.

Description

Technical Field

[0001] The invention relates to the field of die-casting dies, and in particular to a die-casting die for an ultra-thin lamp frame bracket for an automobile. Background Art

[0002] The die-casting process has become one of the important process methods for manufacturing automotive parts due to its advantages of high efficiency, high precision, ability to produce parts with complex shapes and high material utilization. However, when applied to the manufacture of ultra-thin automotive lamp frame brackets, due to the ultra-thin characteristics of the lamp frame bracket, extremely high requirements are placed on the design and manufacture of the die-casting mold. Ultra-thin structures are prone to defects such as incomplete filling, pores, and shrinkage holes during the die-casting process. This requires the die-casting mold's pouring system, exhaust system, cooling system, etc. to be carefully designed and optimized to ensure that the aluminum liquid can flow and fill smoothly in the mold cavity, and obtain good shrinkage compensation and cooling during the solidification process, so as to obtain high-quality, defect-free ultra-thin lamp frame bracket products.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a die-casting mold capable of casting a high-quality ultra-thin automobile lamp frame bracket.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A die-casting mold for an ultra-thin lamp frame bracket for an automobile comprises a fixed mold frame, a movable mold frame, a square iron and a movable mold bottom plate which are arranged in sequence from front to back, the fixed mold frame is provided with a fixed mold core, the movable mold frame is provided with a movable mold core, the fixed mold core and the movable mold core are combined to form a mold cavity, the mold cavity comprises a left mold cavity and a right mold cavity which are arranged symmetrically on the left and right, the left mold cavity and the right mold cavity are both provided with a bottom horizontal protrusion, an outer curved protrusion connected to the bottom horizontal protrusion and extending upward, a front vertical protrusion connected to the bottom horizontal cavity and extending upward, and a front vertical protrusion connected to the front vertical cavity. A longitudinal protrusion connected to the top of the cavity, a rear vertical protrusion connected to the rear end of the longitudinal cavity, a transverse curved protrusion connecting the rear vertical protrusion and the outer curved protrusion, a lower folded protrusion arranged beside the longitudinal wall, and an upper folded protrusion arranged beside the rear vertical wall, the mold gate is arranged in the middle of the bottom of the movable mold core, the gate is connected with the bottom transverse protrusions of the left cavity and the right cavity through a diverter channel, and a vacuum structure for evacuating the mold cavity is provided on the top of the movable mold core, and the vacuum structure is connected with the left cavity and the right cavity through an exhaust flow channel.

[0006] As a further improvement of the above technical solution, the fixed mold core is composed of a first sub-fixed mold core and a second sub-fixed mold core. The first sub-fixed mold core and the second sub-fixed mold core form a temperature control balance zone at the joint adjacent to the gate. The temperature control balance zone controls the temperature difference between the first sub-fixed mold core and the second sub-fixed mold core through a point temperature control component.

[0007] As a further improvement of the above technical solution, the point temperature control assembly includes a first temperature control tube and a second temperature control tube connected in series through a transition steel wire oil pipe, the first temperature control tube cooperates with a blind hole on the first sub-fixed mold core to realize temperature control of the first sub-fixed mold core, and the second temperature control tube cooperates with a blind hole on the second sub-fixed mold core to realize temperature control of the second sub-fixed mold core. As a further improvement of the above technical solution, the first temperature control tube includes a first joint, a first outer tube sealed at one end, and a first inner tube arranged in the first outer tube, the liquid inlet end of the first inner tube extends out of the first outer tube and is connected to the liquid inlet end of the first joint, the open end of the first outer tube is connected to the liquid outlet end of the first joint, the liquid outlet end of the first inner tube is arranged close to the sealed end of the first outer tube, and a reflux channel is formed between the first outer tube and the first inner tube; As a further improvement of the above technical solution, the second temperature control tube includes a second joint, a second outer tube sealed at one end, and a second inner tube arranged in the second outer tube, the liquid inlet end of the second inner tube extends out of the second outer tube and is connected to the liquid inlet end of the second joint, the open end of the second outer tube is connected to the liquid outlet end of the second joint, the liquid outlet end of the second inner tube is arranged close to the sealed end of the second outer tube, and a reflux channel is formed between the second outer tube and the second inner tube.

[0008] As a further improvement of the above technical solution, the first outer tube includes a large-diameter tube section and a small-diameter tube section connected to each other, the large-diameter tube section is connected to the first joint, and the small-diameter tube section is provided with an external thread at the intersection with the large-diameter tube section; the openings of the blind holes of the first sub-fixed mold core and the second sub-fixed mold core are provided with matching internal threads.

[0009] As a further improvement of the above technical solution, the sealing end on the small-diameter pipe section is in a dome structure.

[0010] As a further improvement of the above technical solution, the first joint includes a cylindrical joint body and a liquid inlet nozzle and a liquid outlet nozzle connected to the side wall of the joint body, and a hexagonal hole is provided on the end surface of the joint body away from the first outer tube.

[0011] As a further improvement of the above technical solution, the vacuum structure includes a vacuum filter, a vacuum insert arranged on the cavity of the movable mold core, a pull rod axially passing through the vacuum insert and controlling the opening and closing of the vacuum port, and an oil cylinder driven by the pull rod, and the vacuum insert is connected to the vacuum generating device of the die-casting machine through the vacuum filter.

[0012] As a further improvement of the above technical solution, a notch for installing the oil cylinder is provided on the side of the movable mold frame, and two guide slides that are spaced apart and extend forward and backward are fixed on the inner top surface of the notch. A plug plate that can slide with the two guide slides is provided on the top of the oil cylinder, and a threaded hole is provided on the front end surface of each of the guide slides, and through holes that are the same number and correspond one to one with the threaded holes are provided on the front end surface of the plug plate, and a screw is inserted into each through hole to connect it with the corresponding threaded hole.

[0013] As a further improvement of the above technical solution, the cylinder includes a cylinder body and a top plate arranged on the cylinder body, the piston rod of the cylinder body is connected to the pull rod through a coupling, two flat grooves are provided on the side wall of the end of the pull rod connected to the coupling, the side wall on the coupling is provided with a snap-in mounting port that engages with the flat groove of the pull rod, and the top plate is provided with an avoidance port corresponding to the snap-in mounting port; an L-shaped pad is provided at the bottom of the cylinder body.

[0014] As a further improvement of the above technical solution, a radial positioning block is provided on the top plate, and a radial positioning groove matching the radial positioning block is provided on the side wall of the coupling. The plug plate includes a flat plate body and a limit strip provided on the front end surface of the flat plate body and extending laterally. The flat plate body and the limit strip are combined to form a T-shaped structure, and a through hole is provided on each of the two ends of the limit strip. The flat plate body is fixed to the top plate by screws and is provided with a through hole for the coupling to move.

[0015] Beneficial effects of the present invention: The die-casting mold for the ultra-thin lamp frame bracket for automobiles provided by the present invention has the following advantages: (1) By placing the gate on the lateral and relatively flat side of the product, the phenomenon of aluminum liquid filling with trapped air or aluminum liquid rolling back during the pouring process is reduced, and the synchronization of the gate entering the water during the casting filling is improved, which is conducive to obtaining high-quality ultra-thin lamp frame bracket products and reducing the probability of product defects.

[0016] (2) The aluminum liquid flows along a specific flow path, that is, the aluminum liquid flows from the bottom horizontal protrusion, the front vertical protrusion, the lower folded protrusion to the longitudinal protrusion in sequence, so that the water entering the front vertical protrusion and the lower folded protrusion can be smoothly combined into one stream at the longitudinal protrusion and fill upward synchronously, ensuring the smoothness of filling and improving the product molding quality.

[0017] (3) Compared with other possible gate water inlet solutions, such as entering from the outer curved protrusion or the rear vertical protrusion, this solution avoids problems such as asynchronous filling, difficulty in climbing, and difficulty in controlling cold materials or air holes due to the longitudinal protrusion being at the tail section caused by unreasonable water flow path. It better meets the mechanical requirements of the product and ensures that the final ultra-thin lamp frame bracket product is defect-free and has good mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the movable mold frame and movable mold core of the die-casting mold.

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle L area.

[0020] Figure 3 This is a schematic diagram of the casting and sprue of the ultra-thin lamp frame bracket of an automobile.

[0021] Figure 4 This is a schematic diagram of the automotive ultra-thin lamp frame bracket casting on the moving mold core.

[0022] Figure 5 For the three-dimensional die casting mold Figure 1 .

[0023] Figure 6 It is a structural schematic diagram of the point temperature control component.

[0024] Figure 7 It is a structural schematic diagram of the first temperature control tube and the second temperature control tube of the point temperature control assembly being respectively installed on the first sub-fixed mold core and the second sub-fixed mold core.

[0025] Figure 8 It is a cross-sectional view of the first temperature control tube.

[0026] Fig. 9 Three-dimensional die casting mold Figure 2 .

[0027] Fig.10 This is the assembly drawing of the oil cylinder quick-disassembly structure.

[0028] Fig.11 This is an exploded view of the cylinder quick-disassembly structure.

[0029] Fig.12 It is a structural diagram of the oil cylinder.

[0030] Main component symbols: 1-fixed mold frame, 2-movable mold frame, 21-notch, 31-square iron, 32-movable mold bottom plate, 4-casting, 41-bottom horizontal wall, 42-outer curved wall, 43-front vertical wall, 44-longitudinal wall, 45-rear vertical wall, 46-cross curved wall, 47-downward folded wall, 48-upward folded wall, 5-movable mold core, 50-gate, 51-diverter, 52-left cavity, 53-right cavity, 531-bottom horizontal protrusion, 532-outer curved protrusion , 533-front vertical protrusion, 534-longitudinal protrusion, 535-rear vertical protrusion, 536-cross curved protrusion, 537-downward folding protrusion, 538-upward folding protrusion, 54-exhaust flow channel, 6-fixed mold core, 61-first sub-fixed mold core, 62-second sub-fixed mold core, 63-blind hole, 7-point temperature control component, 71-first temperature control tube, 711-first joint, 7111-joint body, 7112-liquid inlet nozzle, 7113-liquid outlet nozzle, 7 114-inner hexagon hole, 712-first outer tube, 7121-large diameter tube section, 7122-small diameter tube section, 7123-external thread, 7124-sealed end, 713-first inner tube, 714-reflux channel, 72-second temperature control tube, 721-second joint, 722-second outer tube, 73-transition steel wire oil pipe, 74-oil inlet steel wire oil pipe, 75-oil discharge steel wire oil pipe, 9-vacuum structure, 91-vacuum insert, 92-pull rod, 921- flat cut groove, 93- oil cylinder, 931- oil cylinder body, 932- top plate, 9321- avoidance port, 933- coupling, 9331- clamping installation port, 9332- radial positioning groove, 934- radial positioning block, 95- guide slide, 951- threaded hole, 96- plug plate, 961- flat plate, 962- limit strip, 963- through hole, 964- through port, 97- screw, 98- L-shaped pad, 99- vacuum filter. DETAILED DESCRIPTION

[0031] The present invention provides a die-casting mold for an ultra-thin lamp frame bracket for an automobile. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0032] See also Figure 1-Figure 5The present invention provides a die-casting mold for an ultra-thin lamp frame bracket for an automobile, comprising a fixed mold frame 1, a movable mold frame 2, a square iron 31 and a movable mold bottom plate 32 arranged in sequence from front to back, the fixed mold frame 1 is provided with a fixed mold core 6, the movable mold frame 2 is provided with a movable mold core 5, the fixed mold core 6 and the movable mold core 5 are combined to form a mold cavity, the mold cavity comprises a left cavity 52 and a right cavity 53 arranged symmetrically on the left and right, the left cavity 52 and the right cavity 53 are both provided with a bottom transverse protrusion 531 on the movable mold core 5, an outer curved protrusion 532 connected to the bottom transverse protrusion 531 and extending upward, a front vertical protrusion 533 connected to the bottom transverse cavity and extending upward, and a front vertical protrusion 533 connected to the top of the front vertical cavity The longitudinal protrusion 534, the rear vertical protrusion 535 connected to the rear end of the longitudinal cavity, the cross-curved protrusion 536 connecting the rear vertical protrusion 535 and the outer curved protrusion 532, the lower folded protrusion 537 arranged next to the longitudinal wall 44, and the upper folded protrusion 538 arranged next to the rear vertical wall 45, the mold gate 50 is arranged in the middle of the bottom of the movable mold core 5, the gate 50 is connected with the bottom horizontal protrusion 531 of the left cavity 52 and the right cavity 53 through the diversion channel 51, and the top of the movable mold core 5 is provided with a vacuum structure 9 for vacuuming the mold cavity, and the vacuum structure 9 is connected with the left cavity 52 and the right cavity 53 through the exhaust channel 54.

[0033] When the die-casting mold of the ultra-thin lamp frame bracket for automobiles is working, the aluminum liquid is injected from the gate 50 located at the middle of the bottom of the moving mold core 5, and flows into the bottom transverse protrusion 531 of the left cavity 52 and the right cavity 53 which are symmetrically arranged on the left and right sides through the diverter 51. Due to the reasonable setting of the position of the gate 50, when the aluminum liquid enters the cavity, the filling trapped air or aluminum liquid rewinding caused by the many walls in the vertical direction between the flow channel and the water inlet can be reduced, and the water entry time of the gate 50 is relatively synchronized. In the cavity, the aluminum liquid flows along the bottom transverse protrusion 531, the front vertical protrusion 533, and the lower folding protrusion 537 to the longitudinal protrusion 534 in turn. In this process, after the water enters the front vertical protrusion 533 and the lower folding protrusion 537, it will merge into a stream at the longitudinal protrusion 534, so that it can smoothly fill the cavity upward, thereby casting two ultra-thin left lamp frame bracket castings 4 for automobiles that are symmetrical to each other on the left and right sides. At the same time, the vacuum structure set on the top of the movable mold core 5 is connected with the left cavity 52 and the right cavity 53 through the exhaust channel 54, which can perform vacuum operation on the mold cavity, assist the flow and filling of aluminum liquid in the cavity, and facilitate gas discharge.

[0034] See Figure 3As shown, the ultra-thin lamp frame bracket casting 4 of the automobile is a special-shaped part. According to the structure of the cavity, the structure of the casting 4 includes a bottom transverse wall 41, an outer curved wall 42 connected to the bottom transverse wall 41 and extending upward, a front vertical wall 43 connected to the bottom transverse wall 41 and extending upward, a longitudinal wall 44 connected to the top of the front vertical wall 43, a rear vertical wall 45 connected to the rear end of the longitudinal wall 44, a cross-curved wall 46 connecting the rear vertical wall 45 and the outer curved wall 42, a downward folded wall 47 arranged beside the longitudinal wall 44, and an upward folded wall 48 arranged beside the rear vertical wall 45. As an ultra-thin lamp frame bracket, its overall thickness is relatively thin, which means that in the die casting process, the flow and solidification conditions of the aluminum liquid are more stringent. The ultra-thin structure easily leads to problems such as unstable flow and too fast cooling of the aluminum liquid during the filling process, which in turn affects the quality of the casting 4 and increases the possibility of defects such as incomplete filling, pores, and shrinkage holes. From the connection relationship of each wall, the casting 4 has extensions and changes in multiple directions, such as the bottom transverse wall 41 in the horizontal direction, the front vertical wall 43 and the rear vertical wall 45 in the vertical direction, and the outer curved wall 42 and the cross curved wall 46 in the curved direction. This multi-directional extension requires the aluminum liquid to flow evenly in different directions when filling the cavity, and puts higher requirements on the pouring system, exhaust system, etc. of the die-casting mold to ensure that the aluminum liquid can smoothly reach various parts and achieve good filling and solidification. As an automotive component, the lamp frame bracket needs to have certain mechanical properties to withstand the vibration, impact and other loads of the car during driving. Different parts of its structure, such as the longitudinal wall 44 and the bottom transverse wall 41, may have different requirements in mechanical properties, such as strength, stiffness, etc. Therefore, it is necessary to ensure the uniformity and density of the organization of these parts during the die-casting process to meet the mechanical property requirements of the product.

[0035] Assuming that a pouring method is adopted in which the gate 50 and the runner 51 are connected to the outer curved protrusion 532 or the cross-curved protrusion 536, the aluminum liquid will collide with the two longitudinal protrusions 534 after entering the cavity and then diffuse to fill the cavity. The flow path of the aluminum liquid in the cavity becomes complicated and uneven, and the time difference of the aluminum liquid in different parts reaching each area increases, resulting in poor filling synchronization. This means that during the filling process, different parts of the cavity cannot be filled with aluminum liquid at the same time, which will cause stress concentration in the casting 4 during the solidification process, increase the risk of defects such as deformation and cracks in the product, and seriously affect the dimensional accuracy and shape accuracy of the ultra-thin lamp frame bracket. The aluminum liquid collides with the longitudinal protrusion 534, which makes it easier for the gas to be trapped in the cavity. Due to the two collisions, the stability of the aluminum liquid flow is reduced, and the gas is difficult to discharge smoothly. It is easy to form defects such as pores and shrinkage holes inside the casting 4, which reduces the density and mechanical properties of the product, affects the quality and reliability of the product, and may even cause leakage, breakage and other problems in the product during use. This pouring method will cause uneven flow speed and temperature distribution of aluminum liquid in the mold cavity. After the aluminum liquid hits the longitudinal protrusion 534 multiple times, the temperature drops rapidly, forming cold material. The existence of cold material will cause uneven local structure of the casting 4 and reduce mechanical properties, such as strength and toughness. It will also affect the surface quality of the product, causing defects such as cold shut and lack of meat on the surface, reducing the appearance quality and qualified rate of the product.

[0036] In addition, this longitudinal protrusion 534 with a large depth is also one of the factors to be considered in the design of the flow channel. The aluminum liquid flows from the bottom horizontal protrusion 531, the front vertical protrusion 533, and the lower folded protrusion 537 to the longitudinal protrusion 534 in sequence, that is, after water enters the front vertical protrusion 533 and the lower folded protrusion 537, it will be combined into a stream at the longitudinal protrusion 534 and fill upward smoothly. Assuming that the aluminum liquid enters from the rear vertical protrusion 535 and then flows to the longitudinal protrusion 534, after filling the front part, it needs to climb a long slope to reach the tail section, which affects the synchronization of filling on both sides, which means that during the filling process, different parts of the cavity cannot be filled with aluminum liquid at the same time, which will cause stress concentration in the casting 4 during the solidification process, increase the risk of defects such as deformation and cracks in the product, and seriously affect the dimensional accuracy and shape accuracy of the ultra-thin lamp frame bracket. In addition, since the longitudinal wall 44 of the casting 4 has mechanical requirements, it is assumed that the aluminum liquid enters from the outer curved protrusion 532, then flows to the bottom transverse protrusion 531, and then flows to the longitudinal protrusion 534. At this time, the longitudinal protrusion 534 becomes the tail section, which is the final discharge or residual position of the gas. The tail section may cause the cold material or pores to be difficult to control, and the mechanical properties, such as strength and toughness, will be reduced. At the same time, it will also affect the surface quality of the product, causing defects such as cold shut and lack of meat on the surface, reducing the appearance quality and qualified rate of the product.

[0037] The die-casting mold for the ultra-thin automobile lamp frame bracket provided by the present invention has the following advantages: (1) By placing the gate 50 on the lateral and relatively flat side of the product, the phenomenon of entrapped air or reeling of the aluminum liquid during the pouring process is reduced, and the synchronization of the gate 50 entering the water when the casting 4 is filled is improved, which is conducive to obtaining high-quality ultra-thin lamp frame bracket products and reducing the probability of product defects.

[0038] (2) The aluminum liquid flows along a specific flow path, that is, the aluminum liquid flows from the bottom horizontal protrusion 531, the front vertical protrusion 533, the lower folded protrusion 537 to the longitudinal protrusion 534 in sequence, so that the water entering the front vertical protrusion 533 and the lower folded protrusion 537 can be smoothly combined into one stream at the longitudinal protrusion 534 and fill upward synchronously, thereby ensuring the smoothness of filling and improving the product molding quality.

[0039] (3) Compared with other possible water inlet solutions for the gate 50, such as entering from the outer curved protrusion 532 or the rear vertical protrusion 535, this solution avoids the problems of asynchronous filling, difficulty in climbing, and difficulty in controlling cold material or air holes due to the longitudinal protrusion 534 being at the tail section caused by unreasonable water flow path, and better meets the mechanical requirements of the product, ensuring that the final ultra-thin lamp frame bracket product is defect-free and has good mechanical properties.

[0040] For details, see Figure 5 As shown, the fixed mold core 6 is composed of a first sub-fixed mold core 61 and a second sub-fixed mold core 62. The first sub-fixed mold core 61 and the second sub-fixed mold core 62 form a temperature control balance zone at the joint adjacent to the gate 50. The temperature control balance zone controls the temperature difference between the first sub-fixed mold core 61 and the second sub-fixed mold core 62 through the point temperature control component 7. Since the temperature control balance zone is formed at the joint adjacent to the gate 50 and the temperature difference is controlled by the point temperature control component 7, the temperature uniformity of the first sub-fixed mold core 61 and the second sub-fixed mold core 62 during the die-casting process can be effectively ensured. In the die-casting process of the ultra-thin lamp frame bracket, uniform mold temperature is crucial for the smooth flow and uniform filling of the aluminum liquid. It avoids the inconsistent solidification speed of the aluminum liquid due to local temperature differences, thereby reducing the defects such as shrinkage cavities and shrinkage caused by uneven solidification shrinkage, and improving the internal quality and density of the product.

[0041] In fact, in the early theoretical stage of die-casting mold trial, it is impossible to accurately determine whether the temperature change of a certain part is consistent with the computer simulation result. If the temperature control area is inconsistent with the simulation result during the trial stage, it is necessary to heat the oil or cool it with water according to the actual situation; and the temperature control liquid of the ordinary spot cooling temperature control component is connected and discharged by a rubber tube. Because the structure of the rubber tube and the ordinary spot cooling temperature control component will dissolve or leak when subjected to high temperature, if the temperature control needs to be switched from water cooling to oil insulation or heating in the later stage, it cannot be switched.

[0042] See Figure 6As shown, the point temperature control component 7 provided by the present invention includes a first temperature control tube 71 and a second temperature control tube 72 connected in series through a transition steel wire oil pipe 73. The first temperature control tube 71 cooperates with the blind hole 63 on the first sub-fixed mold core 61 to realize temperature control of the first sub-fixed mold core 61, and the second temperature control tube 72 cooperates with the blind hole 63 on the second sub-fixed mold core 62 to realize temperature control of the second sub-fixed mold core 62. The first temperature control tube 71 includes a first joint 711, a first outer tube 712 sealed at one end, and a first inner tube 713 arranged in the first outer tube 712. The liquid inlet end of the first inner tube 713 extends out of the first outer tube 712 and is connected to the liquid inlet end of the first joint 711. The opening end of the first outer tube 712 is connected to the first The liquid outlet end of the joint 711 is connected, the liquid outlet end of the first inner tube 713 is arranged close to the sealed end 7124 of the first outer tube 712, and a reflux channel 714 is formed between the first outer tube 712 and the first inner tube 713; the second temperature control tube 72 includes a second joint 721, a second outer tube 722 sealed at one end, and a second inner tube arranged in the second outer tube 722, the liquid inlet end of the second inner tube extends out of the second outer tube 722 and is connected to the liquid inlet end of the second joint 721, the open end of the second outer tube 722 is connected to the liquid outlet end of the second joint 721, the liquid outlet end of the second inner tube is arranged close to the sealed end 7124 of the second outer tube 722, and a reflux channel 714 is formed between the second outer tube 722 and the second inner tube.

[0043] Thanks to the special structure of the first temperature control tube 71 and the second temperature control tube 72, that is, the design of the inner tube and the outer tube forming a reflux channel 714, and the use of the transition steel wire oil pipe 73 for connection, it can be cooled by water and kept warm or heated by oil. The temperature control area of ​​the first temperature control tube 71 and the second temperature control tube 72 acting together is large, which effectively ensures the temperature uniformity of the first sub-fixed mold core 61 and the second sub-fixed mold core 62 during the die-casting process. The temperature control mode can be flexibly switched according to actual conditions. Compared with ordinary spot cooling temperature control components, it has a wider applicability. In a high temperature environment, it can effectively prevent the leakage of the temperature control liquid, ensure the normal operation of the spot temperature control component 7 in the complex temperature environment of the die-casting mold, and improve the reliability and durability of the spot temperature control component 7.

[0044] To explain in terms of oil connection, the oil is connected to the first temperature control tube 71 through the oil inlet steel wire oil pipe 74, specifically, the oil enters the first inner tube 713 from the liquid inlet end of the first joint 711, and then flows in the first inner tube 713 to the sealed end 7124 of the first outer tube 712, that is, the oil releases heat at the sealed end 7124 of the first outer tube 712 to heat the position set by the mold core to reduce the temperature difference around the position, and then the oil flows back to the liquid outlet end of the first joint 711 through the reflux channel 714 between the first outer tube 712 and the first inner tube 713, and then the oil is transported to the second temperature control tube 72 through the transition steel wire oil pipe 73, the oil flows in the second inner tube to the sealed end 7124 of the second outer tube 722, and then flows back to the liquid outlet end of the second joint 721 through the reflux channel 714 between the second outer tube 722 and the second inner tube, and finally the oil is discharged from the oil discharge steel wire oil pipe 75, thereby forming a complete oil circulation path. The use of steel wire oil pipes enhances the stability and high temperature resistance of the connection, ensuring smooth transmission of oil between different temperature control pipes.

[0045] For details, see Figure 6 As shown, the first outer tube 712 includes a large diameter tube section 7121 and a small diameter tube section 7122 connected to each other, the large diameter tube section 7121 is connected to the first joint 711, and the small diameter tube section 7122 is provided with an external thread 7123 at the intersection with the large diameter tube section 7121; the openings of the blind holes 63 of the first sub-fixed mold core 61 and the second sub-fixed mold core 62 are provided with matching internal threads. During installation, it is only necessary to align the first temperature control tube 71 and the second temperature control tube 72 with the corresponding blind holes 63, and to complete the installation by rotating the temperature control tube so that it cooperates with the internal threads and tightens them. The operation is relatively simple and quick. When the temperature control tube or the mold needs to be maintained or replaced, the temperature control tube can also be easily removed from the blind hole 63, which improves the efficiency of equipment maintenance and reduces the time and cost of mold maintenance.

[0046] See Figures 6 to 8 As shown, the sealing end 7124 on the small-diameter pipe section 7122 is a dome structure, and the dome structure of the sealing end 7124 of the small-diameter pipe section 7122 can effectively disperse the pressure. During the operation of the die-casting mold, the temperature control liquid flows in the temperature control tube, which may generate a certain pressure, and the external environment may also exert pressure. Compared with the sealing end 7124 of a plane or other shape, the dome structure can better withstand these pressures and reduce the risk of damage caused by pressure concentration, thereby enhancing the structural strength of the small-diameter pipe section 7122 and even the entire point temperature control assembly 7. In addition, the dome structure helps to improve the flow state of the temperature control liquid in the tube. When the temperature control liquid flows to the sealing end 7124, the arc surface of the dome can make the temperature control liquid change the flow direction more smoothly, reducing the generation of turbulence and vortices. This is conducive to maintaining the stability of the flow of the temperature control liquid, improving the uniformity and accuracy of the temperature control, and ensuring effective temperature control of the die-casting mold.

[0047] See Figure 6 As shown, the first joint 711 includes a cylindrical joint body 7111 and a liquid inlet nozzle 7112 and a liquid outlet nozzle 7113 connected to the side wall of the joint body 7111. This design facilitates the inlet and outlet of the coolant (or temperature control oil) and makes the inflow and outflow paths of the coolant clear. At the same time, this side connection method increases the flexibility of the connection and can be more conveniently connected to external pipes or other related equipment. For example, according to the layout and space requirements of the mold, the appropriate angle and direction can be selected to connect the coolant supply and return lines, thereby improving the layout rationality and adaptability of the entire temperature control system.

[0048] See Figure 6 As shown, the end surface of the joint body 7111 away from the first outer tube 712 is provided with an inner hexagon hole 7114, which greatly facilitates the installation and removal of the first joint 711. During installation, an inner hexagon wrench can be used to tighten the joint through the inner hexagon hole 7114 to ensure its close connection with other components and prevent leakage of the temperature control liquid. When disassembly is required, the inner hexagon wrench can also be used to easily loosen the joint, which is convenient for maintenance, repair or replacement of the temperature control component, improving operating efficiency and reducing maintenance costs.

[0049] For details, see Fig. 9 and Fig.12 As shown, the vacuum structure includes a vacuum filter 99, a vacuum insert 91 arranged on the cavity of the movable mold core 5, a pull rod 92 axially passing through the vacuum insert 91 and controlling the opening and closing of the air suction port, and an oil cylinder 93 for driving and connecting with the pull rod 92. The vacuum insert 91 is connected to the vacuum generating device of the die casting machine through the vacuum filter 99. During the die casting process of the ultra-thin lamp frame bracket of the automobile, before or at the same time as the aluminum liquid begins to be injected into the mold cavity, the oil cylinder 93 starts and drives the pull rod 92 to move. The pull rod 92 axially passes through the vacuum insert 91, and its movement can control the opening and closing of the air suction port. When the air suction port is opened, the air inside the mold cavity is extracted by means of the vacuum filter 99 through the vacuum insert 91 connected to the vacuum generating device of the die casting machine. During the process of aluminum liquid filling the cavity, continuous vacuuming operation keeps a certain negative pressure environment in the cavity, thereby enabling the aluminum liquid to flow more smoothly in the cavity and fill every corner, and is conducive to timely extraction of the original air in the cavity and the gas generated during the aluminum liquid filling process (such as gas generated by entrained air or material volatilization), thereby avoiding gas residue in the casting 4 to form defects such as pores.

[0050] On the one hand, through effective vacuuming operation, the gas content in the cavity is significantly reduced, which greatly reduces the probability of defects such as pores and shrinkage holes in the ultra-thin lamp frame bracket after die-casting, making the casting 4 more compact and improving the mechanical properties, ensuring that the product quality meets high standards and can work stably and reliably in the use environment of automotive parts. On the other hand, the negative pressure environment in the cavity helps the flow of aluminum liquid in the mold cavity, so that it can fill the complex shape cavity more quickly and evenly, such as the left cavity 52 and the right cavity 53 with multiple protrusions and special structures in the mold, which ensures the integrity of aluminum liquid filling, reduces the problems of material shortage and cold shut caused by insufficient filling, and improves the molding accuracy and appearance quality of the product.

[0051] During the die-casting process, the oil cylinder 93 is a component that drives the pull rod 92 to move, and its operating frequency is relatively high. After long-term use, the seal inside the oil cylinder 93 may wear and age, causing the oil cylinder 93 to leak and other faults. The traditional oil cylinder 93 is usually fixed by a large number of bolts. The distribution position of these bolts may be relatively complex, and some may be located in a small space inside the mold and are difficult to reach. During disassembly, special tools are required, and a lot of time is spent to unscrew the bolts one by one, which increases the difficulty of disassembly. Therefore, the present invention provides a quick-release structure for an oil cylinder.

[0052] The quick-release structure of the oil cylinder is specifically as follows: a notch 21 for installing the oil cylinder 93 is provided on the side of the movable mold frame 2, and two guide slides 95 arranged at intervals and extending forward and backward are fixed on the inner top surface of the notch 21. The top of the oil cylinder 93 is provided with an insert plate 96 that can slidably cooperate with the two guide slides 95. A threaded hole 951 is provided on the front end surface of each of the guide slides 95, and a through hole 963 with the same number and one-to-one corresponding to the threaded hole 951 is provided on the front end surface of the insert plate 96. A screw 97 is inserted into each through hole 963 to connect it with the corresponding threaded hole 951.

[0053] When the oil cylinder 93 needs to be installed, the insert plate 96 is inserted along the guide slide 95, the through hole 963 on the insert plate 96 is aligned with the threaded hole 951 on the front end surface of the guide slide 95, and then the screw 97 is inserted to connect, so that the oil cylinder 93 is fixed to the notch 21 of the movable mold frame 2. When the oil cylinder 93 needs to be removed, it is only necessary to unscrew the screw 97 and then slide the oil cylinder 93 out along the guide slide 95.

[0054] Unlike the traditional fixing method that uses a large number of bolts and is in a complex and difficult-to-reach location, this oil cylinder quick-release structure, through the cooperation of the guide slide 95 and the plug plate 96, only needs to unscrew a small number of screws 97 (two in this case) to pull the entire oil cylinder 93 outward, greatly reducing the steps and time for disassembly. For oil cylinders 93 in complex locations such as the narrow space inside the mold, this method avoids the trouble of using special tools to unscrew a large number of screws 97 one by one, making the disassembly work more convenient, and thus the faulty oil cylinder 93 can be repaired or replaced in time, which helps to reduce production delays caused by oil cylinder 93 failures, ensure the normal progress of die-casting production, and improve production efficiency.

[0055] Furthermore, the oil cylinder 93 includes an oil cylinder body 931 and a top plate 932 disposed on the oil cylinder body 931. The piston rod of the oil cylinder body 931 is connected to the pull rod 92 through a coupling 933, which can achieve relatively accurate power transmission. During the die-casting process, the oil cylinder 93 drives the pull rod 92 to move to control the opening and closing of the air extraction port. This connection method can accurately convert the telescopic action of the oil cylinder 93 into the corresponding action of the pull rod 92, ensuring the accuracy of the opening and closing of the air extraction port, thereby better controlling the vacuuming process of the mold cavity. The oil inlet and outlet joints on the oil cylinder body 931 are used to connect the oil circuit to control the piston rod of the oil cylinder 93 to lift and pull back to control the vacuuming time.

[0056] In fact, two flat grooves 921 are provided on the side wall of the end of the pull rod 92 connected to the coupling 933, a snap-fit ​​installation opening 9331 is provided on the side wall of the coupling 933 to be engaged with the flat groove 921 of the pull rod 92, and an avoidance opening 9321 corresponding to the snap-fit ​​installation opening 9331 is provided on the top plate 932; the two flat grooves 921 on the side wall of the end of the pull rod 92 are engaged with the snap-fit ​​installation opening 9331 on the side wall of the coupling 933, and this design provides a precise positioning method for the connection between the pull rod 92 and the coupling 933. During the installation process, the operator can easily align the pull rod 92 with the coupling 933 so that the flat groove 921 is accurately embedded in the snap-fit ​​installation opening 9331, without the need for a complicated adjustment process, thereby speeding up the installation speed, improving the assembly efficiency, and reducing human errors during the installation process. The connected pull rod 92 and coupling 933 are stable and reliable, which ensures the stability of power transmission and ensures that the pull rod 92 can accurately control the opening and closing of the vacuum port of the vacuum insert 91 to maintain the normal operation of the vacuum valve.

[0057] When the oil cylinder 93 needs to be disassembled, the oil cylinder 93 is pulled forward. Since the coupling 933 is engaged with the pull rod 92 through the flat cut groove 921 and the clamping installation opening 9331, a clearance opening 9321 corresponding to the clamping installation opening 9331 is provided on the top plate 932, so that the coupling 933 can be smoothly separated from the pull rod 92 during the process of pulling the oil cylinder 93 forward. This design greatly simplifies the disassembly process, does not require the use of complex tools or cumbersome operations, and saves disassembly time and labor costs.

[0058] Furthermore, a radial positioning block 934 is provided on the top plate 932, and a radial positioning groove 9332 is provided on the side wall of the coupling 933 to match the radial positioning block 934. Through such a configuration, on the one hand, the coupling 933 can be accurately positioned and installed to ensure that the clamping installation port 9331 on the coupling 933 is aligned with the pull rod 92 toward the rear, and on the other hand, the radial positioning block 934 can guide the coupling 933 to move linearly to avoid deflection that affects the opening and closing performance of the pull rod 92.

[0059] Specifically, the plug plate 96 includes a flat plate body 961 and a limit bar 962 disposed on the front end surface of the flat plate body 961 and extending transversely. The flat plate body 961 and the limit bar 962 are combined to form a T-shaped structure. The two ends of the limit bar 962 are respectively provided with a through hole 963. The flat plate body 961 is fixedly connected to the top plate 932 by screws 97 and is provided with a through hole 964 for the coupling 933 to move. When the plug plate 96 is connected to the threaded hole 951 on the front end surface of the guide slide bar 95 by screws 97 through the through holes 963 at both ends of the limit bar 962, the limit bar 962 can effectively prevent the plug plate 96 from shaking in other directions (such as left and right, up and down) other than the front and back directions, thereby ensuring the position stability of the oil cylinder 93 after installation, ensuring the relative position accuracy between the oil cylinder 93 and the pull rod 92 and other components, and facilitating the normal operation of the vacuum valve.

[0060] Preferably, the oil cylinder 93 is a thin oil cylinder. In a die-casting mold, the space is often limited. The design of the thin oil cylinder can better adapt to the compact space inside the mold, especially at the notch 21 opened on the side of the movable mold frame 2 for installing the oil cylinder 93. Compared with the traditional oil cylinder, the thin oil cylinder 93 occupies less space, reduces the interference with the layout of other parts of the mold, makes the internal structure of the mold more compact and reasonable, and helps to achieve a more optimized design in a limited mold space.

[0061] Preferably, an L-shaped pad 98 is provided at the bottom of the oil cylinder 93, and the L-shaped pad 98 can prop up the oil cylinder 93 to prevent the oil cylinder 93 from being suspended in the air; the vertical part of the L-shaped pad 98 is connected to the movable mold frame 2 by screws, so that the connection between the oil cylinder 93 and the movable mold frame 2 is more secure. This connection method can effectively resist the vibration and impact force generated during the die-casting operation, reduce the possibility of loosening of the oil cylinder 93, maintain the accurate installation position of the oil cylinder 93 on the movable mold frame 2, and ensure the accuracy of the oil cylinder 93 driving the pull rod 92 in the vacuum valve, thereby ensuring the stable vacuum process.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. Die-casting mold for ultra-thin automobile lamp frame bracket, characterized in that: The mold base comprises a fixed mold frame, a movable mold frame, a square iron and a movable mold bottom plate which are arranged in sequence from front to back, wherein the fixed mold frame is provided with a fixed mold core, the movable mold frame is provided with a movable mold core, the fixed mold core and the movable mold core are combined to form a mold cavity, the mold cavity comprises a left mold cavity and a right mold cavity which are arranged symmetrically on the left and right, the left mold cavity and the right mold cavity are both provided with a bottom horizontal protrusion, an outer curved protrusion connected to the bottom horizontal protrusion and extending upward, a front vertical protrusion connected to the bottom horizontal cavity and extending upward, and a longitudinally extending protrusion connected to the top of the front vertical cavity. A protrusion, a rear vertical protrusion connected to the rear end of the longitudinal cavity, a cross-curved protrusion connecting the rear vertical protrusion and the outer curved protrusion, a lower folded protrusion arranged beside the longitudinal wall, and an upper folded protrusion arranged beside the rear vertical wall. The mold gate is arranged in the middle of the bottom of the movable mold core, and the gate is connected with the bottom horizontal protrusions of the left cavity and the right cavity through a diversion channel. The top of the movable mold core is provided with a vacuum structure for vacuuming the mold cavity, and the vacuum structure is connected with the left cavity and the right cavity through an exhaust flow channel.

2. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 1, characterized in that: The fixed mold core is composed of a first sub-fixed mold core and a second sub-fixed mold core. The first sub-fixed mold core and the second sub-fixed mold core form a temperature control balance zone at the joint adjacent to the gate. The temperature control balance zone controls the temperature difference between the first sub-fixed mold core and the second sub-fixed mold core through a point temperature control component.

3. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 2, characterized in that: The point temperature control assembly includes a first temperature control tube and a second temperature control tube connected in series through a transition steel wire oil pipe, the first temperature control tube cooperates with a blind hole on the first sub-fixed mold core to realize temperature control of the first sub-fixed mold core, and the second temperature control tube cooperates with a blind hole on the second sub-fixed mold core to realize temperature control of the second sub-fixed mold core. The first temperature control tube includes a first joint, a first outer tube sealed at one end, and a first inner tube arranged in the first outer tube, wherein the liquid inlet end of the first inner tube extends out of the first outer tube and is connected to the liquid inlet end of the first joint, the open end of the first outer tube is connected to the liquid outlet end of the first joint, the liquid outlet end of the first inner tube is arranged close to the sealed end of the first outer tube, and a reflux channel is formed between the first outer tube and the first inner tube; The second temperature control tube includes a second joint, a second outer tube sealed at one end, and a second inner tube arranged in the second outer tube, the liquid inlet end of the second inner tube extends out of the second outer tube and is connected to the liquid inlet end of the second joint, the open end of the second outer tube is connected to the liquid outlet end of the second joint, the liquid outlet end of the second inner tube is arranged close to the sealed end of the second outer tube, and a reflux channel is formed between the second outer tube and the second inner tube.

4. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 3, characterized in that: The first outer tube includes a large-diameter tube section and a small-diameter tube section connected to each other, the large-diameter tube section is connected to the first joint, and the small-diameter tube section is provided with an external thread at the intersection with the large-diameter tube section; the openings of the blind holes of the first sub-fixed mold core and the second sub-fixed mold core are provided with matching internal threads.

5. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 4, characterized in that: The sealing end on the small diameter pipe section is in a dome structure.

6. The die-casting mold for the ultra-thin automobile lamp frame bracket according to claim 4, characterized in that: The first joint comprises a cylindrical joint body and a liquid inlet nozzle and a liquid outlet nozzle connected to the side wall of the joint body. The end surface of the joint body away from the first outer tube is provided with an inner hexagonal hole.

7. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 1, characterized in that: The vacuum structure includes a vacuum filter, a vacuum insert arranged on the cavity of the moving mold core, a pull rod axially passing through the vacuum insert and controlling the opening and closing of the air suction port, and an oil cylinder connected to the pull rod drive. The vacuum insert is connected to the vacuum generating device of the die-casting machine through the vacuum filter.

8. The die-casting mold for the ultra-thin lamp frame bracket of an automobile according to claim 7, characterized in that: A notch for installing the oil cylinder is provided on the side of the movable mold frame, and two guide slide bars which are arranged at intervals and extend forward and backward are fixed on the inner top surface of the notch. A plug plate which can slide with the two guide slide bars is provided on the top of the oil cylinder, and a threaded hole is provided on the front end surface of each guide slide bar, and through holes which are the same in number and correspond one to one to the threaded holes are provided on the front end surface of the plug plate, and a screw is inserted into each through hole to connect it with the corresponding threaded hole.

9. The die-casting mold for the ultra-thin automobile lamp frame bracket according to claim 8, characterized in that: The oil cylinder comprises an oil cylinder body and a top plate arranged on the oil cylinder body, the piston rod of the oil cylinder body is connected to the pull rod through a coupling, two flat grooves are provided on the side wall of the end of the pull rod connected to the coupling, the side wall on the coupling is provided with a snap-in mounting opening that engages with the flat groove of the pull rod, and the top plate is provided with an avoidance opening corresponding to the snap-in mounting opening; an L-shaped pad is provided on the bottom of the oil cylinder body.

10. The die-casting mold for the ultra-thin automobile lamp frame bracket according to claim 9, characterized in that: A radial positioning block is arranged on the top plate, a radial positioning groove matching with the radial positioning block is arranged on the side wall of the coupling, the plug plate comprises a flat plate body and a limit strip arranged on the front end surface of the flat plate body and extending laterally, the flat plate body and the limit strip are combined to form a T-shaped structure, a through hole is respectively arranged on the two ends of the limit strip, the flat plate body is fixedly connected to the top plate by screws and is provided with a through hole for the coupling to move.

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