A die-casting forming device for a grooved heating plate

Abstract

The present invention discloses a die-casting forming device for a grooved heating plate, which relates to the technical field of die-casting equipment and includes a die-casting machine, a driving cylinder, a movable mold, a fixed mold, a die-casting device, an exhaust device, a heating plate and a heating device. The die-casting machine and the driving cylinder are fixedly connected. The die-casting machine and the movable mold are slidably connected. The die-casting machine and the fixed mold are fixedly connected. The die-casting machine and the die-casting device are fixedly connected. The output end of the driving cylinder and the movable mold are fixedly connected. The output end of the die-casting device and the fixed mold are fixedly connected. An exhaust device is provided on the fixed mold. The fixed mold and the heating plate are fixedly connected. The die-casting machine serves as the main installation foundation for the installation and positioning of other devices. The output displacement of the driving cylinder drives the movable mold to move. The die-casting device injects die-casting liquid between the movable mold and the fixed mold. The exhaust device discharges the gas between the movable mold and the fixed mold. The heating plate and the heating device heat the fixed mold to prevent the occurrence of cold shut phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting equipment, and specifically to a die-casting forming equipment with a grooved heating plate. Background Art

[0002] A die-casting machine is a machine used for die-casting. Under pressure, the die-casting machine injects molten metal liquid into a mold for cooling and forming. After the mold is opened, a solid metal casting can be obtained.

[0003] When the die-casting liquid of the die-casting machine is poured into the mold, the temperature drop at adjacent positions cannot be too fast. A too fast temperature drop will cause a temperature difference at adjacent positions, thereby causing the occurrence of a cold shut phenomenon, resulting in gaps in the casting and reducing the quality of the casting. When the gas in the mold is discharged during the pouring process, it may cause the pouring liquid to enter the air holes, resulting in blocked air holes and affecting the mold exhaust. At the same time, the existing electric heating wire has a metal tube as the outer shell, and electric heating alloy wires are evenly distributed along the central axis inside the tube. The gap between it and the metal shell is filled with magnesium oxide powder with good insulation and heat conduction performance. However, there is a phenomenon of gaps in the filling of magnesium oxide powder in the existing such process, resulting in uneven temperature conduction during heating and affecting the heating efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a die-casting forming equipment with a grooved heating plate to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] The die-casting forming equipment includes a die-casting machine, a driving cylinder, a moving mold, a fixed mold, a die-casting device, an exhaust device, a heating plate, and a heating device. The die-casting machine and the driving cylinder are fixedly connected. The die-casting machine and the moving mold are slidably connected. The die-casting machine and the fixed mold are fixedly connected. The die-casting machine and the die-casting device are fixedly connected. The output end of the driving cylinder and the moving mold are fixedly connected. The output end of the die-casting device and the fixed mold are fixedly connected. An exhaust device is provided on the fixed mold. The fixed mold and the heating plate are fixedly connected. A plurality of heating devices are provided on the heating plate. The plurality of heating devices and the heating plate are fixedly connected.

[0007] The die-casting machine serves as the main installation basis for the installation and positioning of other devices. The displacement output by the driving cylinder drives the moving mold to move until the moving mold and the fixed mold are connected. Then, die-casting liquid is injected between the moving mold and the fixed mold through the die-casting device. The gas between the moving mold and the fixed mold is discharged through the exhaust device. When the liquid level height in the mold reaches the corresponding standard, the exhaust and liquid injection are stopped. During the liquid injection of the die-casting device, the fixed mold is heated simultaneously by the heating plate and the heating device to prevent the die-casting liquid from cooling too quickly locally in the mold, resulting in a cold shut phenomenon and causing defects in the die-cast metal.

[0008] Further, the fixed mold is provided with a first installation groove, a second installation groove, a third installation groove, a die-casting hole and an exhaust hole. The second installation groove communicates with the third installation groove, and the third installation groove communicates with the exhaust hole. The first installation groove is fixedly connected to the exhaust device, the second installation groove is fixedly connected to the exhaust device, and the third installation groove is fixedly connected to the exhaust device. The output end of the die-casting equipment is placed in the die-casting hole, and the output end of the die-casting equipment is fixedly connected to the die-casting hole.

[0009] The first installation groove, the second installation groove and the third installation groove provided provide installation positions for the exhaust device, enabling the exhaust device to discharge the gas in the fixed mold. The die-casting hole provided provides an installation position for the output end of the die-casting equipment, enabling the die-casting equipment to send the die-casting liquid into the fixed mold. The exhaust hole provided enables the gas between the fixed mold and the movable mold to be discharged through the exhaust hole.

[0010] Further, the exhaust device includes a detection device, a fixed cylinder, a fixed block, an output cylinder and a scraper. The detection device is placed in the first installation groove and is fixedly connected to the first installation groove. The fixed cylinder is placed in the second installation groove and is fixedly connected to the second installation groove. The fixed block is placed in the second installation groove and is slidably connected to the second installation groove. The output end of the fixed cylinder is fixedly connected to the fixed block. The output cylinder is placed in the third installation groove and is fixedly connected to the third installation groove. The scraper is placed in the third installation groove and is fixedly connected to the third installation groove. The output cylinder is fixedly connected to the scraper.

[0011] When the die-casting liquid enters the fixed mold, the pressure in the mold is detected by the detection device, and the fixed cylinder drives the fixed block to retract, enabling the gas in the fixed mold to enter the exhaust hole through the third installation groove and be discharged. When the die-casting liquid reaches the specified height, after the detection device detects the pressure change, the output displacement of the fixed cylinder drives the fixed block to move until the fixed block blocks the third installation groove, preventing the gas from flowing out of the third installation groove, thereby preventing the die-casting liquid in the fixed mold from entering the exhaust hole and causing the risk of blocking the exhaust hole. After die-casting is completed, after the fixed mold and the movable mold are separated, the output displacement of the output cylinder drives the scraper to move, so that the scraper can clean the third installation groove, preventing residual die-casting liquid from adhering to the third installation groove and affecting the exhaust effect.

[0012] Further, the detection device includes a ceramic shell, a metal upper electrode plate, a metal lower electrode plate and a dielectric medium. The ceramic shell is placed in the first installation groove and is fixedly connected to the first installation groove. The metal upper electrode plate, the dielectric medium and the metal lower electrode plate are sequentially placed in the ceramic shell, and there is a vacuum cavity between the dielectric medium and the metal upper electrode plate.

[0013] By placing the metal upper plate, dielectric medium, and metal lower plate in sequence to enable the current to flow in series, setting up a vacuum chamber provides conditions for the deformation of the metal upper plate. The ceramic housing is deformed by the pressure of the die-casting liquid, which in turn exerts pressure on the metal upper plate, causing it to deform. This affects the change in the resistance value of the metal upper plate, resulting in a change in the current of the detection device. The change in current corresponds to the magnitude of the pressure of the die-casting liquid on the ceramic housing. By detecting the magnitude of the current value of the detection device, the height change of the die-casting liquid in the fixed mold is reflected, thus achieving the detection effect of the height of the die-casting liquid in the fixed mold.

[0014] Furthermore, the heating device includes a metal heating wire, an electromagnet, a power change switch, a heating power source, and a heat source power supply. The metal heating wire is placed on the heating plate, the electromagnet is placed inside the heating plate, and the power change switch is placed inside the heating plate. There are two metal heating wires and two electromagnets. The electromagnet is wound with a wire. The power change switch is wire-connected to the heating power source, and the heat source power supply is wire-connected to the two metal heating wires respectively. The heating power source is wire-connected in parallel to the two metal heating wires respectively. The two metal heating wires are respectively wire-connected to the wires on the adjacent electromagnets.

[0015] After starting to heat the heating plate, the metal heating wire is heated by the heat source power supply. At the same time, after the heat of the die-casting liquid is transferred to the metal heating wire through the heating plate, the temperature of the metal heating wire changes. The temperature change of the metal heating wire reflects the temperature of the metal heating wire relative to the heating plate. When one of the two adjacent metal heating wires has a lower temperature, due to the slower increase in its resistance value at the lower temperature, the current passing through this metal heating wire increases. The increase in the current in the metal heating wire causes the magnetic force of the connected electromagnet to increase. The increase in the magnetic force of the electromagnet increases the force exerted on the power change switch by the electromagnet, causing the power change switch to be wire-connected to the wire on the electromagnet and cutting off the circuit connection between the electromagnet and the heat source power supply. At the same time, the wire on the electromagnet is connected to the heating power source, and the metal heating wire is quickly heated by the heating power source, causing the temperature of the metal heating wire to rise, thereby driving the temperature of the heating plate to rise, thus preventing the occurrence of cold shut in the die-casting liquid in the fixed mold.

[0016] Furthermore, the electromagnet is provided with a first electrode, a second electrode, a third electrode, a return spring, and a first connection electrode. The first electrode is connected to the heat source power supply, the second electrode is wire-connected to the wire on the electromagnet. The first electrode, the second electrode, and the third electrode are on the same straight line. The return spring is placed between the first electrode and the second electrode and is tightly connected to the first connection electrode. The upper half of the first electrode is conductive, and the lower half of the third electrode is conductive.

[0017] When heating the metal heating wire through a heating power source, the current flows from the first electrode to the first connecting electrode and then to the second electrode, and then through the second electrode to the metal heating wire. When heating the metal heating wire at a relatively low temperature through the heating power source, the current flows from the heating power source to the power change switch, then to the third electrode and then to the second electrode, and then through the second electrode to the metal heating wire, quickly heating the metal heating wire. The heat is transferred to the heating plate through the increase in the temperature of the metal heating wire, and then transferred to the fixed mold through the heating plate, so as to heat the die casting liquid near this position to prevent the cold shut phenomenon.

[0018] Further, the power change switch includes a support column, a steering rod, a connecting magnet, a second connecting electrode and an insulating electrode. There are two connecting magnets and second connecting electrodes. The support column is firmly connected to the heating plate. One end of the support column away from the heating plate is rotatably connected to the steering rod. Both ends of the steering rod are firmly connected to the two connecting magnets respectively. The connecting magnet is firmly connected to the adjacent second connecting electrode. The second connecting electrode is connected to the heating power source. An insulating electrode is provided on the second connecting electrode, and the second connecting electrode is firmly connected to the insulating electrode.

[0019] The support column serves as the main installation base for supporting other components. When it is necessary to switch from the heating power source to the heating power source, the magnetic force of the electromagnet increases due to the increase in the current passing through the metal heating wire at a relatively low temperature, so that the magnetic force on the electromagnet at a relatively low temperature is strengthened. As a result, the force exerted by the electromagnet connected to the metal heating wire at a relatively low temperature on the connecting magnet is strengthened, causing the connecting magnet to move in the direction of lower temperature. The movement of the connecting magnet drives the second connecting electrode and the insulating electrode to rotate until the second connecting electrode is connected to the third electrode, the insulating electrode is connected to the second connecting electrode, and at the same time, the insulating electrode exerts pressure on the first connecting electrode, causing the first connecting electrode to move downward, so that the connection between the first connecting electrode and the second electrode is cancelled.

[0020] Further, a heating wire installation groove and an installation cavity are provided on the heating plate. The metal heating wire is placed in the heating wire installation groove, and the electromagnet and the power change switch are placed in the installation cavity. The electromagnet is firmly connected to the installation cavity, the power change switch is firmly connected to the installation cavity, and the support column is firmly connected to the installation cavity.

[0021] The heating wire installation groove provides an installation base for the metal heating wire, the installation cavity is used for installing and positioning the electromagnet, and the installation cavity is used for installing and positioning the support column.

[0022] Further, a die casting through hole is also provided on the heating plate. The output end of the die casting equipment is placed in the die casting through hole. The die casting through hole and the die casting hole are located on the same straight line. The output end of the die casting equipment sequentially passes through the die casting through hole and the die casting hole and enters the fixed mold.

[0023] The die-casting through hole provides an installation position for the output end of the die-casting equipment, enabling the die-casting liquid output from the output end of the die-casting equipment to be directly injected into the fixed mold.

[0024] Furthermore, the width of the heating wire installation groove is smaller than the diameter of the metal heating wire.

[0025] By setting the width of the heating wire installation groove to be smaller than the diameter of the metal heating wire, when installing the metal heating wire, a smaller pressure needs to be applied first to clamp the metal heating wire in the heating wire installation groove to ensure it can be stably placed in the correct position. Then, a larger pressure is applied multiple times with a small stroke to slowly embed the metal heating wire into the heating wire installation groove until the metal heating wire is completely fitted into the heating wire installation groove. By squeezing the metal heating wire multiple times, the magnesium oxide powder in the gap between the metal heating wire and the metal shell is filled more tightly, improving its performance.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. An exhaust device is provided. By detecting the height of the die-casting liquid through the exhaust device, when the die-casting liquid reaches the specified height, the exhaust is stopped to prevent the die-casting liquid from entering the exhaust hole and causing blockage of the exhaust hole.

[0028] 2. A scraper is provided to clean the third installation groove through the scraper to prevent the die-casting liquid from entering the third installation groove, reducing the exhaust effect and thus affecting the die-casting quality.

[0029] 3. By loading the metal heating wire in a way of pressing it multiple times, the magnesium oxide powder in the gap between the metal heating wire and the metal shell is filled more tightly, improving the performance of metal heating.

[0030] 4. A heating device is provided. By comparing the temperatures of two adjacent metal heating wires, the lower metal heating wire is heated, thereby increasing the temperature at the position where the lower-temperature metal heating wire is located, and thus increasing the temperature near this area to prevent the occurrence of cold shut phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of the present invention;

[0032] Figure 2 is the structural schematic diagram of the moving mold of the present invention;

[0033] Figure 3 is the structural schematic diagram of the fixed mold of the present invention;

[0034] Figure 4 is Figure 3 the enlarged view of partial A;

[0035] Figure 5 is Figure 3Partial enlarged view of B;

[0036] Figure 6 Schematic diagram of the metal heating wire structure of the present invention;

[0037] Figure 7 Schematic diagram of the heating plate structure of the present invention;

[0038] Figure 8 Schematic diagram of the heating device structure of the present invention;

[0039] Figure 9 is Figure 8 Partial enlarged view of C.

[0040] In the figure: 1, die casting machine; 2, driving cylinder; 3, moving mold; 4, fixed mold; 41, first installation groove; 42, second installation groove; 43, third installation groove; 44, die casting hole; 45, exhaust hole; 5, die casting equipment; 6, exhaust device; 61, detection device; 611, ceramic shell; 612, metal upper electrode plate; 613, metal lower electrode plate; 614, dielectric medium; 62, fixed cylinder; 63, fixed block; 64, output cylinder; 65, scraper; 7, heating plate; 711, heating wire installation groove; 712, installation cavity; 713, die casting through hole; 8, heating device; 81, metal heating wire; 82, electromagnet; 821, first electrode; 822, second electrode; 823, third electrode; 824, return spring; 825, first connection electrode; 83, power change switch; 831, support column; 832, steering rod; 833, connection magnet; 834, second connection electrode; 835, insulating electrode. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment: As Figures 1 - 9As shown in the figure, the present invention provides a technical solution for a grooved heating plate die-casting forming device. The die-casting forming device includes a die-casting machine 1, a driving cylinder 2, a moving die 3, a fixed die 4, a die-casting device 5, an exhaust device 6, a heating plate 7, and a heating device 8. The die-casting machine 1 and the driving cylinder 2 are fixedly connected. The die-casting machine 1 and the moving die 3 are slidably connected. The die-casting machine 1 and the fixed die 4 are fixedly connected. The die-casting machine 1 and the die-casting device 5 are fixedly connected. The output end of the driving cylinder 2 and the moving die 3 are fixedly connected. The output end of the die-casting device 5 and the fixed die 4 are fixedly connected. The fixed die 4 is provided with an exhaust device 6. The fixed die 4 and the heating plate 7 are fixedly connected. The heating plate 7 is provided with a plurality of heating devices 8. The plurality of heating devices 8 and the heating plate 7 are fixedly connected.

[0043] The die-casting machine 1 serves as the main installation base for the installation and positioning of other devices. The displacement output by the driving cylinder 2 drives the movement of the moving die 3 until the moving die 3 is connected to the fixed die 4. Then, the die-casting liquid is injected between the moving die 3 and the fixed die 4 through the die-casting device 5. The gas between the moving die 3 and the fixed die 4 is discharged through the exhaust device 6. The exhaust and liquid injection are stopped until the liquid level height in the die reaches the corresponding standard. During the liquid injection of the die-casting device 5, the fixed die 4 is heated simultaneously by the heating plate 7 and the heating device 8 to prevent the local temperature of the die-casting liquid in the die from dropping too fast, resulting in a cold shut phenomenon, which causes defects in the die-cast metal.

[0044] As Figures 2 - 5 shown, the fixed die 4 is provided with a first installation groove 41, a second installation groove 42, a third installation groove 43, a die-casting hole 44, and an exhaust hole 45. The second installation groove 42 and the third installation groove 43 are connected. The third installation groove 43 and the exhaust hole 45 are connected. The first installation groove 41 and the exhaust device 6 are fixedly connected. The second installation groove 42 and the exhaust device 6 are fixedly connected. The third installation groove 43 and the exhaust device 6 are fixedly connected. The output end of the die-casting device 5 is placed in the die-casting hole 44. The output end of the die-casting device 5 and the die-casting hole 44 are fixedly connected.

[0045] The first installation groove 41, the second installation groove 42, and the third installation groove 43 provided provide installation positions for the exhaust device 6, enabling the exhaust device 6 to discharge the gas in the fixed die 4. The die-casting hole 44 provided provides an installation position for the output end of the die-casting device 5, enabling the die-casting device 5 to send the die-casting liquid into the fixed die 4. The exhaust hole 45 provided enables the gas between the fixed die 4 and the moving die 3 to be discharged through the exhaust hole 45.

[0046] As Figures 2 - 5As shown, the exhaust device 6 includes a detection device 61, a fixed cylinder 62, a fixed block 63, an output cylinder 64, and a scraper 65. The detection device 61 is placed in the first installation groove 41, and the detection device 61 is tightly connected to the first installation groove 41. The fixed cylinder 62 is placed in the second installation groove 42, and the fixed cylinder 62 is tightly connected to the second installation groove 42. The fixed block 63 is placed in the second installation groove 42, and the fixed block 63 is slidably connected to the second installation groove 42. The output end of the fixed cylinder 62 is tightly connected to the fixed block 63. The output cylinder 64 is placed in the third installation groove 43, and the output cylinder 64 is tightly connected to the third installation groove 43. The scraper 65 is placed in the third installation groove 43, and the scraper 65 is tightly connected to the third installation groove 43. The output cylinder 64 is tightly connected to the scraper 65.

[0047] When the die-casting liquid enters the fixed mold 4, the pressure inside the mold is detected by the detection device 61. The fixed cylinder 62 drives the fixed block 63 to retract, so that the gas inside the fixed mold 4 can enter the exhaust hole 45 through the third installation groove 43 and be discharged. When the die-casting liquid reaches the specified height, after the detection device 61 detects the pressure change, the fixed cylinder 62 outputs a displacement to drive the fixed block 63 to move until the fixed block 63 blocks the third installation groove 43, so that the gas no longer flows out of the third installation groove 43, thus preventing the die-casting liquid in the fixed mold 4 from entering the exhaust hole 45 and causing the risk of blocking the exhaust hole 45. After die-casting is completed, after the fixed mold 4 and the moving mold 3 are separated, the output cylinder 64 outputs a displacement to drive the scraper 65 to move, so that the scraper 65 can clean the third installation groove 43, preventing residual die-casting liquid from adhering to the third installation groove 43 and affecting the exhaust effect.

[0048] As Figures 4 - 5 shown, the detection device 61 includes a ceramic housing 611, a metal upper electrode plate 612, a metal lower electrode plate 613, and a dielectric medium 614. The ceramic housing 611 is placed in the first installation groove 41, and the ceramic housing 611 is tightly connected to the first installation groove 41. The metal upper electrode plate 612, the dielectric medium 614, and the metal lower electrode plate 613 are sequentially placed in the ceramic housing 611, and there is a vacuum chamber between the dielectric medium 614 and the metal upper electrode plate 612.

[0049] By placing the metal upper plate 612, dielectric medium 614, and metal lower plate 613 in sequence to enable the current to flow in series, setting up a vacuum chamber provides conditions for the deformation of the metal upper plate 612. The ceramic housing 611 is extruded by the die-casting liquid to cause the ceramic housing 611 to deform, thereby squeezing the metal upper plate 612 to make the metal upper plate 612 deform, which affects the resistance change of the metal upper plate 612. The current of the detection device 61 changes, and the change in current corresponds to the pressure of the die-casting liquid on the ceramic housing 611. By detecting the magnitude of the current value of the detection device 61, the height change of the die-casting liquid in the fixed mold 4 is reflected, thus achieving the detection effect of the height of the die-casting liquid in the fixed mold 4.

[0050] As Figures 6 - 9 shown, the heating device 8 includes a metal heating wire 81, an electromagnet 82, a power conversion switch 83, a heating power source, and a heat source power supply. The metal heating wire 81 is placed on the heating plate 7, the electromagnet 82 is placed inside the heating plate 7, and the power conversion switch 83 is placed inside the heating plate 7. There are two metal heating wires 81 and two electromagnets 82. The electromagnet 82 is wound with a wire. The power conversion switch 83 is wire-connected to the heating power source, the heat source power supply is respectively wire-connected to the two metal heating wires 81, the heating power source is respectively wire-connected in parallel to the two metal heating wires 81, and the two metal heating wires 81 are respectively wire-connected to the wires on the adjacent electromagnets 82.

[0051] After starting to heat the heating plate 7, the metal heating wire 81 is heated by the heat source power supply. At the same time, after the heat of the die-casting liquid is transferred to the metal heating wire 81 through the heating plate 7, the temperature of the metal heating wire 81 changes. The temperature change of the metal heating wire 81 reflects the temperature of the metal heating wire 81 corresponding to the heating plate 7. When one of the two adjacent metal heating wires 81 has a lower temperature, due to the lower temperature of this metal heating wire 81, its resistance value rises slower, resulting in an increase in the current passing through this metal heating wire 81. The increase in the current in the metal heating wire 81 increases the magnetic force of the connected electromagnet 82. The increase in the magnetic force of the electromagnet 82 increases the acting force of the electromagnet 82 on the power conversion switch 83, causing the power conversion switch 83 to be wire-connected to the wire on the electromagnet 82, cutting off the circuit connection between the electromagnet 82 and the heat source power supply. At the same time, the wire on the electromagnet 82 is connected to the heating power source, and the metal heating wire 81 is quickly heated by the heating power source to increase the temperature of the metal heating wire 81, thereby driving the temperature of the heating plate 7 to rise, thus preventing the occurrence of cold shuts in the die-casting liquid in the fixed mold 4.

[0052] As Figures 8 - 9As shown in the figure, the electromagnet 82 is provided with a first electrode 821, a second electrode 822, a third electrode 823, a return spring 824 and a first connection electrode 825. The first electrode 821 is connected to the heating power supply, the second electrode 822 is connected to the wire on the electromagnet 82. The first electrode 821, the second electrode 822 and the third electrode 823 are on the same straight line. The return spring 824 is placed between the first electrode 821 and the second electrode 822. The return spring 824 is fixedly connected to the first connection electrode 825. The upper half of the first electrode 821 is conductive, and the lower half of the third electrode 823 is conductive.

[0053] When the metal heating wire 81 is heated by the heating power supply, the current flows through the first electrode 821 to the first connection electrode 825 and then to the second electrode 822, and then through the second electrode 822 to the metal heating wire 81. When the lower-temperature metal heating wire 81 is heated by the heating power supply, the current flows through the heating power supply to the power conversion switch 83, then to the third electrode 823, and then to the second electrode 822, and then through the second electrode 822 to the metal heating wire 81, quickly heating the metal heating wire 81. The heat is transferred to the heating plate 7 through the temperature rise of the metal heating wire 81, and then transferred to the fixed mold 4 through the heating plate 7, so as to heat the die-casting liquid near this position to prevent cold shut phenomenon.

[0054] As Figures 8 - 9 shown in the figure, the power conversion switch 83 includes a support column 831, a steering rod 832, a connecting magnet 833, a second connection electrode 834 and an insulating electrode 835. There are two connecting magnets 833 and second connection electrodes 834. The support column 831 is fixedly connected to the heating plate 7. One end of the support column 831 away from the heating plate 7 is rotatably connected to the steering rod 832. Both ends of the steering rod 832 are fixedly connected to the two connecting magnets 833 respectively. The connecting magnet 833 is fixedly connected to the adjacent second connection electrode 834. The second connection electrode 834 is connected to the heating power supply. The insulating electrode 835 is provided on the second connection electrode 834. The second connection electrode 834 is fixedly connected to the insulating electrode 835.

[0055] The support column 831 serves as the main installation base for supporting other components. When it is necessary to switch from the heating power source to the heating power source, the increase in the current passing through the low-temperature metal heating wire 81 causes an increase in the magnetic force of the electromagnet 82, thereby strengthening the magnetic force on the low-temperature electromagnet 82. As a result, the force exerted by the electromagnet 82 connected to the low-temperature metal heating wire 81 on the connecting magnet 833 is strengthened, causing the connecting magnet 833 to move in the direction of lower temperature. The movement of the connecting magnet 833 drives the rotation of the second connecting electrode 834 and the insulating electrode 835 until the second connecting electrode 834 is connected to the third electrode 823, the insulating electrode 835 is connected to the second connecting electrode 834, and at the same time, the insulating electrode 835 exerts pressure on the first connecting electrode 825, causing the first connecting electrode 825 to move downward, thereby disconnecting the first connecting electrode 825 from the second electrode 822.

[0056] As Figures 6 - 7 shown in the figure, the heating plate 7 is provided with a heating wire installation groove 711 and an installation cavity 712. The metal heating wire 81 is placed in the heating wire installation groove 711, and the electromagnet 82 and the power conversion switch 83 are placed in the installation cavity 712. The electromagnet 82 is fixedly connected to the installation cavity 712, the power conversion switch 83 is fixedly connected to the installation cavity 712, and the support column 831 is fixedly connected to the installation cavity 712.

[0057] The heating wire installation groove 711 provides an installation base for the metal heating wire 81, the installation cavity 712 is used for installing and positioning the electromagnet 82, and the installation cavity 712 is used for installing and positioning the support column 831.

[0058] As Figures 6 - 7 shown in the figure, the heating plate 7 is also provided with a die-casting through hole 713. The output end of the die-casting device 5 is placed in the die-casting through hole 713. The die-casting through hole 713 and the die-casting hole 44 are located on the same straight line. The output end of the die-casting device 5 sequentially passes through the die-casting through hole 713 and the die-casting hole 44 and enters the fixed mold 4.

[0059] The die-casting through hole 713 provides an installation position for the output end of the die-casting device 5, so that the die-casting liquid output by the output end of the die-casting device 5 can be directly injected into the fixed mold 4.

[0060] As Figure 6 shown in the figure, the width of the heating wire installation groove 711 is smaller than the diameter of the metal heating wire 81.

[0061] By setting the width of the heating wire installation groove 711 to be smaller than the diameter of the metal heating wire 81, when installing the metal heating wire 81, a smaller pressure needs to be applied first to clamp the metal heating wire 81 in the heating wire installation groove 711 to ensure that it can be firmly placed in the correct position. Then, a larger pressure is applied multiple times with a small stroke to slowly embed the metal heating wire 81 into the heating wire installation groove 711 until the metal heating wire 81 is completely fitted into the heating wire installation groove 711. By squeezing the metal heating wire 81 multiple times, the magnesium oxide powder in the gap between the metal heating wire 81 and the metal shell is filled more tightly, improving its performance.

[0062] The working principle of the present invention: When the die-casting equipment 5 injects die-casting liquid into the fixed mold 4, the die-casting liquid squeezes the ceramic shell 611, causing the ceramic shell 611 to deform, which in turn squeezes the metal upper plate 612, causing the metal upper plate 612 to deform, thereby affecting the resistance change of the metal upper plate 612. This causes the current of the detection device 61 to change. The height of the die-casting liquid is detected based on the magnitude of the current value. When the height of the die-casting liquid reaches the specified height, after the detection device 61 detects the pressure change, the fixed cylinder 62 outputs a displacement to drive the fixed block 63 to move until the fixed block 63 blocks the third installation groove 43, preventing the gas from flowing out of the third installation groove 43, thus preventing the die-casting liquid in the fixed mold 4 from entering the exhaust hole 45 and causing the risk of blocking the exhaust hole 45. When the heating disk 7 starts to be heated, the metal heating wire 81 is heated by the heating power supply. At the same time, after the heat of the die-casting liquid is transferred to the metal heating wire 81 through the heating disk 7, the temperature of the metal heating wire 81 changes. The temperature change of the metal heating wire 81 reflects the temperature of the metal heating wire 81 corresponding to the heating disk 7. When one of the two adjacent metal heating wires 81 has a lower temperature, due to the slower increase in its resistance value caused by the lower temperature of the metal heating wire 81, the current passing through the metal heating wire 81 increases. The increase in the current in the metal heating wire 81 increases the magnetic force of the connected electromagnet 82. The increase in the magnetic force of the electromagnet 82 increases the force exerted by the electromagnet 82 on the power change switch 83, causing the power change switch 83 to be connected to the wire on the electromagnet 82, cutting off the circuit connection between the electromagnet 82 and the heating power supply. At the same time, the wire on the electromagnet 82 is connected to the heating power supply, and the metal heating wire 81 is quickly heated by the heating power supply, causing the temperature of the metal heating wire 81 to increase, which in turn drives the temperature of the heating disk 7 to rise, thus preventing the occurrence of cold shut in the die-casting liquid in the fixed mold 4.

[0063] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A die-casting forming device for a grooved heating plate, characterized in that: The die-casting forming equipment includes a die-casting machine (1), a driving cylinder (2), a moving mold (3), a fixed mold (4), a die-casting device (5), an exhaust device (6), a heating plate (7), and a heating device (8). The die-casting machine (1) and the driving cylinder (2) are fixedly connected. The die-casting machine (1) and the moving mold (3) are slidably connected. The die-casting machine (1) and the fixed mold (4) are fixedly connected. The die-casting machine (1) and the die-casting device (5) are fixedly connected. The output end of the driving cylinder (2) and the moving mold (3) are fixedly connected. The output end of the die-casting device (5) and the fixed mold (4) are fixedly connected. An exhaust device (6) is provided on the fixed mold (4). The fixed mold (4) and the heating plate (7) are fixedly connected. A plurality of heating devices (8) are provided on the heating plate (7). The plurality of heating devices (8) and the heating plate (7) are fixedly connected; The heating device (8) includes a metal heating wire (81), an electromagnet (82), a power conversion switch (83), a heating power source, and a heating power supply. The metal heating wire (81) is placed on the heating plate (7). The electromagnet (82) is placed inside the heating plate (7). The power conversion switch (83) is placed inside the heating plate (7). There are two metal heating wires (81). There are two electromagnets (82). The electromagnet (82) is wound with a wire. The power conversion switch (83) is electrically connected to the heating power supply. The heating power source is electrically connected to the two metal heating wires (81) respectively. The heating power supply is electrically connected in parallel to the two metal heating wires (81) respectively. The two metal heating wires (81) are respectively connected to the wires on the adjacent electromagnets (82); The power conversion switch (83) includes a support column (831), a steering rod (832), a connecting magnet (833), a second connecting electrode (834), and an insulating electrode (835). There are two connecting magnets (833) and two second connecting electrodes (834). The support column (831) and the heating plate (7) are fixedly connected. One end of the support column (831) away from the heating plate (7) is rotatably connected to the steering rod (832). Both ends of the steering rod (832) are fixedly connected to the two connecting magnets (833) respectively. The connecting magnet (833) is fixedly connected to the adjacent second connecting electrode (834). The second connecting electrode (834) is connected to the heating power supply. An insulating electrode (835) is provided on the second connecting electrode (834). The second connecting electrode (834) and the insulating electrode (835) are fixedly connected.

2. The die-casting forming equipment of a grooved heating plate according to claim 1, characterized in that: The fixed mold (4) is provided with a first installation groove (41), a second installation groove (42), a third installation groove (43), a die-casting hole (44) and an exhaust hole (45). The second installation groove (42) communicates with the third installation groove (43), the third installation groove (43) communicates with the exhaust hole (45), the first installation groove (41) is fixedly connected to the exhaust device (6), the second installation groove (42) is fixedly connected to the exhaust device (6), the third installation groove (43) is fixedly connected to the exhaust device (6), the output end of the die-casting device (5) is placed in the die-casting hole (44), and the output end of the die-casting device (5) is fixedly connected to the die-casting hole (44).

3. The die-casting forming equipment for a grooved heating plate according to claim 2, wherein: The exhaust device (6) includes a detection device (61), a fixed cylinder (62), a fixed block (63), an output cylinder (64) and a scraper (65). The detection device (61) is placed in the first installation groove (41) and is fixedly connected to the first installation groove (41). The fixed cylinder (62) is placed in the second installation groove (42) and is fixedly connected to the second installation groove (42). The fixed block (63) is placed in the second installation groove (42) and is slidably connected to the second installation groove (42). The output end of the fixed cylinder (62) is fixedly connected to the fixed block (63). The output cylinder (64) is placed in the third installation groove (43) and is fixedly connected to the third installation groove (43). The scraper (65) is placed in the third installation groove (43) and is fixedly connected to the third installation groove (43). The output cylinder (64) is fixedly connected to the scraper (65).

4. The die-casting forming equipment for a grooved heating plate according to claim 3, characterized in that: The detection device (61) includes a ceramic housing (611), a metal upper electrode plate (612), a metal lower electrode plate (613) and a dielectric medium (614). The ceramic housing (611) is placed in the first installation groove (41) and is fixedly connected to the first installation groove (41). The metal upper electrode plate (612), the dielectric medium (614) and the metal lower electrode plate (613) are sequentially placed in the ceramic housing (611), and there is a vacuum chamber between the dielectric medium (614) and the metal lower electrode plate (613).

5. The die-casting forming equipment for a grooved heating plate according to claim 1, characterized in that: The electromagnet (82) is provided with a first electrode (821), a second electrode (822), a third electrode (823), a return spring (824) and a first connection electrode (825). The first electrode (821) is connected to a heating power source. The second electrode (822) is connected to a wire on the electromagnet (82). The first electrode (821), the second electrode (822) and the third electrode (823) are located on the same straight line. The return spring (824) is placed between the first electrode (821) and the second electrode (822) and is fixedly connected to the first connection electrode (825). The upper half of the first electrode (821) is conductive, and the lower half of the third electrode (823) is conductive.

6. The die-casting forming equipment for a grooved heating plate according to claim 1, characterized in that: The heating plate (7) is provided with a heating wire installation groove (711) and an installation cavity (712). The metal heating wire (81) is placed in the heating wire installation groove (711). The electromagnet (82) and the power change switch (83) are placed in the installation cavity (712). The electromagnet (82) is fixedly connected to the installation cavity (712), the power change switch (83) is fixedly connected to the installation cavity (712), and the support column (831) is fixedly connected to the installation cavity (712).

7. The die-casting forming equipment for a grooved heating plate according to claim 6, characterized in that: The heating plate (7) is further provided with a die-casting through hole (713). The output end of the die-casting device (5) is placed in the die-casting through hole (713). The die-casting through hole (713) and the die-casting hole (44) are located on the same straight line. The output end of the die-casting device (5) sequentially passes through the die-casting through hole (713) and the die-casting hole (44) and enters the fixed mold (4).

8. A die-casting forming device for a grooved heating plate according to claim 7, characterized in that: The width of the groove of the heating wire installation groove (711) is smaller than the diameter of the metal heating wire (81).

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