Integrated system of melting device and liquid injection mechanism and injection method thereof

Abstract

To provide an integrated system of a dissolving device and a liquid injection mechanism, and an injection method thereof.SOLUTION: A machine base, comprising an injection device, a melting cylinder, a tooling device and a driving device, wherein the melting cylinder is mounted above the injection device, a lower portion of a front end of the melting cylinder is connected to an input end of the injection device, and an upright holding furnace is provided above a rear end of the melting cylinder, so that a raw material or an alloy material is melted into molten alloy in an alloy melting furnace; The molten alloy is fed into the holding furnace through the input pipeline, flows into the melting cylinder, is heated by the plurality of heaters to keep the temperature of the molten alloy, then flows into the injection device again, and is extruded and injected from the front end of the injection device by the operation of the drive device to enter the tool device for cooling and molding, thereby completing the injection molding of the alloy.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an integrated system of a melting apparatus and a liquid injection mechanism and an injection method thereof, and more particularly to a mechanism that enables a melting furnace to simultaneously directly deliver molten alloys to one or more metal injection molding machines, thereby performing injection molding of different or the same alloys. [Background technology]

[0002] 1, a conventional metal injection molding machine includes a machine base 11, an injection unit 12 mounted horizontally on the bottom of the machine base 11, a melting cylinder 13 mounted above the injection unit 12, a tooling device 14 mounted on the injection unit 12 in a corresponding manner on the machine base 11 and positioned in front of the injection unit 12, and a drive unit 15 mounted on the injection unit 12 in a corresponding manner on the machine base 11 and positioned behind the injection unit 12. 3 is horizontal and has an upright holding furnace 131 above its rear end, and a material supply device 16 is provided at the input end 132 at the front end of the furnace. A plurality of rod-shaped alloy material 161 (magnesium alloy billets) are attached to the material supply device 16, and a hydraulic cylinder 121 is provided below the injection device 12 to prevent backflow. Heaters 133 and 122 are provided above the melting cylinder 13 and at the front end of the injection device 12 to surround the melting cylinder 13 and the outer casing of the injection device 12, and the material supply device 16 can feed alloy material 161 (magnesium alloy billets) into the melting cylinder 13 to melt it into molten alloy.

[0003] As a result, when in use, the material supply device 16 feeds alloy material 161 (magnesium alloy billet) into the melting cylinder 13, and by heating the multiple heaters 133, 122, the rod-shaped alloy material 161 can be melted to become molten alloy.The molten alloy is then fed directly into the injection device 12, and by operating the drive device 15, the molten alloy is extruded and injected from the front end of the injection device 12, where it enters the jig and tool device 14 and is cooled and molded, completing the injection molding of the alloy.

[0004] Although the melting cylinder 13 described above can be used to melt rod-shaped alloy material 161 in advance to form molten alloy, and then feed it into the injection device 12 for injection molding, the well-known and conventional metal injection molding machine has the following disadvantages in use.

[0005] 1. Regarding the difficulty of supplying material, when the rod-shaped alloy material 161 is introduced into the melting cylinder 13 to be melted into molten alloy due to differences in the physical thermal expansion coefficients of each type of material (the thermal expansion coefficients of some materials are nonlinear), the alloy material 161 with a nonlinear thermal expansion coefficient is likely to become clogged due to an increase in temperature, which can easily lead to the material supply device 16 not being able to supply material smoothly or being interrupted.Furthermore, the rod-shaped alloy material 161 appears as a cylinder, and in processes using the cylindrical rod-shaped alloy material 161, in addition to the smelting process, it may be necessary to go through a processing process, and there is also waste material during the processing process, which leads to a significant increase in costs.

[0006] Second, regarding the tendency for a large amount of impurities and slag to be contained, the poor airtightness of the top cover of the holding furnace 131 allows external air and moisture to easily enter the holding furnace 131. When preheated moisture is added to the melting cylinder 13 and the molten alloy comes into contact with the air and moisture, it is oxidized and a relatively large amount of impurities or slag is formed. These impurities are then directly transported along with the molten alloy into the injection unit 12 and are injection molded together with the molten alloy, which may degrade the quality of the finished molded product. Alternatively, the impurities or slag may also block the temperature detected by the temperature detector, causing an error signal to appear in the detection signal, which may affect the normal operation of the machine 11.

[0007] 3. In the holding furnace 131 of the conventional metal injection molding machine, the protective gas may be a gas with a high global warming potential (GWP), such as SF6 or HFO. In particular, SF6 has a value more than 20,000 times that of CO2 and is considered a substance that causes global warming.

[0008] As can be seen from this, the above-mentioned known and conventional articles still have many drawbacks and cannot be said to be of good design, and improvements are urgently needed. Summary of the Invention [Problem to be solved by the invention]

[0009] In light of this, the inventors of the present application have used their many years of experience in the manufacture, development, and design of related products to carry out detailed design and careful evaluations to achieve the above-mentioned goals, and have finally completed this invention, which is certainly practical.

[0010] The objective of the present invention is to provide an integrated system of melting equipment and liquid injection mechanism, and an injection method thereof, which allows multiple sets of molten alloys from a melting furnace to be directly delivered to one or more metal injection molding machines simultaneously to perform injection molding of different or the same alloys.

[0011] Another object of the present invention is to provide an integrated system of a melting apparatus and a liquid injection mechanism, and an injection method thereof, which uses an alloy melting furnace to melt raw materials or alloy materials without the problem of difficulty in material supply, and which has a preferable airtightness of the holding furnace, preventing air and moisture from entering the melting cylinder, so that the molten alloy is not easily oxidized to form relatively large amounts of impurities or slag, and the volume dimensions of the alloy melting furnace and holding furnace can be planned according to the actual requirements of the ``weight / shot'' and ``cycle time'' of the liquid injection machine, thereby achieving high safety. [Means for solving the problem]

[0012] In accordance with the above-mentioned objectives, the present invention provides an integrated system of a melting apparatus and a liquid injection mechanism and an injection method thereof, which mainly comprises a machine base, which includes an injection device, a melting cylinder, a tooling device, and a drive device, wherein the injection device is horizontally mounted and fixed to the lower end of the machine base, and the melting cylinder is installed above the injection device, and the horizontal melting cylinder has a lower front end connected to the input end of the injection device and a holding furnace standing upright above its rear end, and the melting cylinder and the holding furnace are provided with a plurality of heaters surrounding the melting cylinder and the lower end outer periphery of the holding furnace, and the holding furnace is connected to an alloy melting furnace via an input pipeline. The tooling device is attached to the machine base and is located in front of the injection device, and the drive device is installed on the machine base and is located behind the injection device, so that during use, raw materials or alloy materials are melted in the alloy melting furnace to form molten alloy, the molten alloy is fed into the holding furnace through the input pipeline and flows into the melting cylinder, is heated by the heaters to keep the temperature of the molten alloy, and then flows back into the injection device, and is extruded and injected from the front end of the injection device by operating the drive device, so that the molten alloy enters the tooling device, where it is cooled and shaped, thereby completing the alloy injection molding.

[0013] In the present invention, the holding furnace (POT) further has an upper end, an upper flange at the upper end, an outer lid above the upper flange, a lower flange at the lower end of the upper end, cooling water input / output channels at the upper end of the outer lid, and cooling water input / output channels surrounding and covering the outer wall of the holding furnace between the upper and lower flanges, the cooling water input / output channels communicating with the cooling water input / output channels, and cooling water flowing between the cooling water input / output channels and the cooling water input / output channels provides a heat insulating effect to the lower flange.

[0014] In the present invention, an O-ring is further provided above the upper rim of the upper end of the holding furnace, and by providing the O-ring between the upper rim and the outer lid, the installation of the O-ring provides the holding furnace with better airtightness.

[0015] In the present invention, a differential pressure sensor is further provided in the holding furnace, and the differential pressure sensor is connected to a control electric circuit on the machine base to measure the differential pressure within the holding furnace and is configured to be able to predict pressure changes within the holding furnace.

[0016] In the present invention, at least one temperature detector is further provided in the holding furnace, and the temperature detector is connected to a control electric circuit on the machine base and serves to measure temperature changes within the holding furnace.

[0017] In the present invention, at least one liquid level detector is further provided in the holding furnace, and the liquid level detector is connected to a control electric circuit on the machine base to measure the liquid level of the molten alloy in the holding furnace, and is configured to be able to predict changes in the liquid level of the molten alloy in the holding furnace.

[0018] In the present invention, the molten alloy is further transferred from the alloy melting furnace to the holding furnace via an input pipeline by tilting the crucible, the earth's gravity, a metering pump, a differential pressure of an inert gas, or a piston system.

[0019] In the present invention, raw materials or alloy materials are further melted in the alloy melting furnace to form a molten alloy, and the alloy materials may be a magnesium alloy billet, and the magnesium alloy billet may be a magnesium-lithium alloy billet.

[0020] In the present invention, at least three ports are further provided on the outer cover at the upper end of the holding furnace, and one of the ports is connected to the alloy melting furnace via the input pipe line.

[0021] In the present invention, an upper isolation valve is further provided at the connection point between the input pipeline and the holding furnace, an upper cooling water channel for thermal insulation is lined around the outer periphery of the upper isolation valve, an expansion pipe is connected to the lower end of the upper isolation valve, an inner sleeve pipe is connected to the inside of the expansion pipe for guiding the flow of the molten alloy and preventing splashing, a lower isolation valve is connected to the outside of the inner sleeve pipe, and a lower isolation valve is lined around the outer periphery of the lower isolation valve for thermal insulation.

[0022] In the present invention, the expansion pipe may be made of a steel material, and the inner sleeve pipe may be made of a heat-resistant material such as a steel material or ceramic.

[0023] In the present invention, a vacuum pump is further provided outside another of the at least three ports on the outer lid at the top end of the holding furnace, and the vacuum pump is used to draw a vacuum inside the holding furnace and extract moisture and air from the holding furnace, thereby reducing moisture and oxygen in the alloy melting furnace, the input pipe line, and the holding furnace, and improving the slag foaming phenomenon of oxide films that form from the molten alloy in the alloy melting furnace, the input pipe line, and the holding furnace.The vacuum pump is also used to generate negative pressure or a pressure difference, so that the molten alloy in the alloy melting furnace can be more smoothly drawn in via the input pipe line by the Earth's gravity and the negative pressure or pressure difference, and sent into the holding furnace.

[0024] In the present invention, a protective gas piping path is further provided on another one of the at least three ports on the outer lid at the upper end of the holding furnace, and the alloy melting furnace can be supplied with inert gas through the protective gas piping path, thereby reducing the amount of moisture and oxygen in the alloy melting furnace, the input pipe line, and the holding furnace and bringing them into contact with the molten alloy, thereby improving the slag foaming phenomenon of oxide films that occurs in the alloy melting furnace, the input pipe line, and the holding furnace.

[0025] In the present invention, the inert gas may further be argon gas.

[0026] In the present invention, the molten alloy is further transferred from the alloy melting furnace through an input pipeline into a plurality of holding furnaces of different machines, enabling injection molding of different or the same alloy to be performed using the same or different tooling equipment.

[0027] In the present invention, the driving device may be an injection hydraulic cylinder or an injection pneumatic cylinder.

[0028] In the present invention, the alloy melting furnace further includes a built-in stirring device for stirring the molten metal.

[0029] In the present invention, an elevator is further provided below the alloy melting furnace, and is used to raise or lower the height of the alloy melting furnace. [Effects of the Invention]

[0030] In the present invention, the alloy melting furnace may further comprise a plurality of units, and the purpose of continuous production can be achieved by preparing molten alloy that can be melted in the alloy melting furnace when transporting the molten alloy. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a schematic plan view of a well-known metal injection molding machine. [Figure 2] 1 is a plan view of an integrated system of a melting device and a liquid ejection mechanism according to the present invention, and a method for ejecting the same. [Figure 3] 1 is a side view of an integrated system of a melting device and a liquid injection mechanism according to the present invention, and a liquid injection method thereof; [Figure 4] 2A to 2C are schematic views of the upper end of the injection crucible of the integrated system of the melting apparatus and the liquid injection mechanism of the present invention and the injection method thereof; [Figure 5]1 is a schematic plan view of an injection crucible of the integrated system of the melting apparatus and the liquid injection mechanism of the present invention and the injection method thereof; FIG. [Figure 6] 1 is a schematic diagram showing a series of operations for injecting molten metal in an integrated system of a melting apparatus and a liquid injection mechanism of the present invention and an injection method thereof. [Figure 7] 1 is a schematic diagram showing a series of operations for injecting molten metal in an integrated system of a melting apparatus and a liquid injection mechanism of the present invention and an injection method thereof. [Figure 8] 1 is a schematic diagram showing a series of operations for injecting molten metal in an integrated system of a melting apparatus and a liquid injection mechanism of the present invention and an injection method thereof. [Figure 9] 10A to 10C are schematic diagrams showing a series of operations for injecting molten metal in another preferred embodiment of the integrated system of the melting device and the liquid injection mechanism of the present invention and the injection method thereof. [Figure 10] 10A to 10C are schematic diagrams showing a series of operations for injecting molten metal in another preferred embodiment of the integrated system of the melting device and the liquid injection mechanism of the present invention and the injection method thereof. [Figure 11] 10A to 10C are schematic diagrams showing a series of operations for injecting molten metal in another preferred embodiment of the integrated system of the melting device and the liquid injection mechanism of the present invention and the injection method thereof. [Figure 12] 1 is a flow chart showing the operation of the injection method of the integrated system of the melting device and the liquid injection mechanism of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0032] In order to allow the examiner to better recognize and understand the purpose, shape, features of the structural device, and effects of the present invention, the present invention will be described in detail below using examples in combination with drawings.

[0033] The present invention further relates to an "integrated system of a melting device and a liquid injection mechanism," and as shown with reference to Figures 2 to 11, the integrated system of a melting device and a liquid injection mechanism of the present invention mainly comprises a machine base 21, which includes an injection device 22, a melting cylinder 23, a jig and tooling device 24, and a drive device 26.

[0034] Among them, the injection unit 22 is horizontally mounted and fixed to the lower end of the machine base 21 .

[0035] The melting cylinder 23 is installed above the injection device 22, and is horizontal. The lower front end of the melting cylinder 23 is connected to the input end of the injection device 22, and a holding furnace 25 is provided upright above the rear end. The melting cylinder 23 and the holding furnace 25 are equipped with a plurality of heaters 231, 2510 that surround the melting cylinder 23 and the lower end outer periphery of the holding furnace 25, and the holding furnace 25 is connected to an alloy melting furnace 31 via an input pipeline 27.

[0036] The jig and tooling device 24 is attached to the machine base 21 in a corresponding manner and is located in front of the injection device 22 .

[0037] The drive unit 26 is mounted on the machine base 21 correspondingly and is located behind the injection unit 22 .

[0038] According to the above-described construction and assembly, in use, raw materials or alloy materials are melted in the alloy melting furnace 31 to form molten alloy, which is then fed into the holding furnace 25 via the input pipeline 27, then flows back into the melting cylinder 23, where it is heated by the heaters 231, 2510 to keep it warm, and then flows back into the injection device 22. At the same time, the drive device 26 is operated to extrude the molten alloy from the front end of the injection device 22, where it enters the jig and tooling device 24, where it is cooled and shaped, thereby completing the alloy injection molding.

[0039] The holding furnace 25 (POT) has an upper end 251, an upper flange 252 (flange) provided on the upper end 251, an O-ring 253 provided above the upper flange 252, an outer lid 254 provided on the upper end of the O-ring 253, a lower flange 255 (flange) provided on the lower end of the upper end 251, a cooling water input / output water channel 256 provided on the upper end of the outer lid 254, and a cooling water supply passage 256 between the upper flange 252 and the front A cooling water input / output water channel 257 is provided between the lower flange 255 and the cooling water input / output water channel 256, surrounding and covering the outer wall of the holding furnace 25. The cooling water output / input water channel 256 is connected to the cooling water input / output water channel 257, and cooling water (not shown in the figure) flows between the cooling water output / input water channel 256 and the cooling water input / output water channel 257, thereby providing a heat insulating effect to the lower flange 255, and the installation of the O-ring 253 makes the holding furnace 25 airtight.

[0040] A differential pressure sensor 41 is further provided in the holding furnace 25. The differential pressure sensor 41 is connected to a control electric circuit 42 on the machine base 21 to measure the differential pressure within the holding furnace 25, and is configured to be able to predict pressure changes within the holding furnace 25.

[0041] At least one temperature detector 43 is further provided in the holding furnace 25, and the temperature detector 43 is connected to a control electric circuit 42 on the machine base 21 to measure temperature changes within the holding furnace 25.

[0042] At least one liquid level detector 44 is further provided in the holding furnace 25, and the liquid level detector 44 is connected to the control electric circuit 42 on the machine base 21 to measure the liquid level of the molten alloy in the holding furnace 25, and is configured to be able to predict changes in the liquid level of the molten alloy in the holding furnace 25.

[0043] The molten alloy is transferred from the alloy melting furnace 31 into the holding furnace 25 via the input pipe 27 by tilting the crucible, the earth's gravity, a metering pump, a differential pressure of an inert gas, or a piston type.

[0044] In the alloy melting furnace 31, raw materials or alloy materials are melted to form a molten alloy, where the alloy materials may be a magnesium alloy billet, and the magnesium alloy billet may be a magnesium-lithium alloy billet or a magnesium-lithium-aluminum alloy billet.

[0045] At least three ports are provided on the outer cover 254 of the upper end 251 of the holding furnace 25, and one of the ports is connected to the alloy melting furnace 31 via the input pipe 27.

[0046] An upper isolation valve 271 is provided at the connection point between the input pipeline 27 and the holding furnace 25. An upper cooling water conduit 272 for thermal insulation is arranged around the outer periphery of the upper isolation valve 271. An expansion pipe 273 is connected to the lower end of the upper isolation valve 271. An inner sleeve pipe 274 is connected to the inside of the expansion pipe 273 to guide the flow of the molten alloy and prevent splashing. A lower isolation valve 275 is connected to the outside of the inner sleeve pipe 274. A lower cooling water conduit 276 for thermal insulation is arranged around the outer periphery of the lower isolation valve 275. The expansion pipe 273 may be made of steel, and the inner sleeve pipe 274 may be made of steel or a heat-resistant material such as ceramic.

[0047] A vacuum pump 259 is provided outside another of the at least three ports on the outer cover 254 of the upper end 251 of the holding furnace 25. The vacuum pump 259 draws a vacuum inside the holding furnace 25 and removes moisture and air from the holding furnace 25, thereby reducing moisture and oxygen in the alloy melting furnace 31, the input pipe 27, and the holding furnace 25 and improving the slag foaming phenomenon of oxide films formed from the molten alloy in the alloy melting furnace 31, the input pipe 27, and the holding furnace 25. The vacuum pump 259 generates a negative pressure or pressure difference, allowing the molten alloy to be more smoothly drawn from the alloy melting furnace 31 via the input pipe 27 and delivered to the holding furnace 25 by the Earth's gravity and the negative pressure or pressure difference.

[0048] A protective gas piping path 2511 is provided on another of the at least three ports on the outer lid 254 of the upper end 251 of the holding furnace 25, and the protective gas piping path 2511 is connected to the alloy melting furnace 31. The alloy melting furnace 31 can be supplied with air or an inert gas (e.g., argon gas) via the protective gas piping path 2511, thereby reducing the moisture and oxygen in the alloy melting furnace 31, the input pipe line 27, and the holding furnace 25 and bringing them into contact with the molten alloy, thereby improving the slag foaming phenomenon of oxide films that occurs in the alloy melting furnace 31, the input pipe line 27, and the holding furnace 25.

[0049] Molten alloy is fed from the alloy melting furnace 31 through an input pipeline 27 into the holding furnaces 25 of multiple different machines 21, allowing injection molding of different or the same alloy to be performed using the same or different tooling devices 24.

[0050] The drive device 26 may be a hydraulic cylinder or a pneumatic cylinder.

[0051] As shown in FIG. 3, the alloy melting furnace 31 has a built-in stirring device 311, which is used to stir the molten metal.

[0052] As shown in FIG. 3, an elevator 312 is provided below the alloy melting furnace 31, and is used to raise or lower the height of the alloy melting furnace 31.

[0053] As shown with reference to Figures 9, 10 and 11, in another optimal embodiment of the present invention, the alloy material is melted in the alloy melting furnace 31 to form molten alloy, and the molten alloy is fed into the holding furnace 25 by tilting.

[0054] As shown in FIG. 12, the injection method of the integrated system of the melting device and the liquid injection mechanism of the present invention includes the following steps 1 to 4.

[0055] In step 1, the alloy material is melted in the alloy melting furnace 31 to form a molten alloy.

[0056] In step 2, the molten alloy is sent from the alloy melting furnace 31 into the holding furnace 25 via the input pipeline 27, flows into the melting cylinder 23, is heated by the heaters 231, 2510 to keep the molten alloy warm, and then flows back into the injection device 22.

[0057] In step 3, the injection device 22 extrudes and injects the molten alloy from the front end of the injection device 22 by operating the drive device 26.

[0058] In step 4, the molten alloy is introduced into the tooling device 24 and cooled and molded to complete the injection molding of the alloy.

[0059] Next, as shown in FIG. 12, raw materials or alloy materials are melted in the alloy melting furnace 31 to form a molten alloy, and the molten alloy is fed into the holding furnace 25 via the input pipeline 27 by negative pressure or pressure difference.

[0060] Next, as shown in FIG. 12, raw materials or alloy materials are melted in the alloy melting furnace 31 to form a molten alloy, and the molten alloy is transferred into the holding furnace 25 via the input pipeline 27 by tilting the crucible, the earth's gravity, a metering pump, a differential pressure of an inert gas, or a piston type.

[0061] In summary, the integrated system of melting device and liquid injection mechanism and its injection method of the present invention are certainly unprecedented and innovative structures, which have not been published in any publications, and no similar products are found on the market, so it can be said without a doubt that they are novel. In addition, the unique features and functions possessed by the present invention are far superior to those of conventional products, which are well known and commonly used, and therefore they are certainly more inventive than those of conventional products, and meet the requirements for filing a patent for invention under China's Patent Law. A patent application is hereby filed in accordance with the law.

[0062] The above description is merely the best specific embodiment of the present invention, however, the structural features of the present invention are not limited to these, and all changes and modifications that can be easily thought of within the field of the present invention by anyone familiar with the art of the subject matter are intended to be encompassed within the scope of the claims of this application attached as an attachment. [Explanation of symbols]

[0063] 21: Machine stand 22: Injection device 23: Melting cylinder 24:Jig and tool equipment 25: Holding furnace 26: Drive unit 231, 2510: Heater 27: Input pipe 31: Alloy melting furnace 251: Upper end 252: superior ridge 253: O-ring 254: Outer lid 255: Inferior ridge 256: Cooling water output / input channel 257: Cooling water input / output channel 259: Vacuum pump 271: Upper isolation valve 272: Cooling water waterway 273: Telescopic tube 274: Inner sleeve tube 275: Lower isolation valve 276: Cooling water sewer 2511: Protective gas piping route 311: Stirring device 312: Lifting device 41: Differential pressure sensor 42: Control circuit 43: Temperature detector 44: Liquid level detector

Claims

1. An integrated melting apparatus and liquid injection mechanism system comprising a machine base, The machine base includes an injection device horizontally installed and fixed to the lower end of the machine base, a melting cylinder installed above the injection device, an upright holding furnace installed above the rear end of the melting cylinder, a jig and tool device correspondingly attached to the machine base and located in front of the injection device, and a drive device correspondingly installed on the machine base and located behind the injection device, The melting cylinder is horizontal, and a lower front end thereof is connected to an input end of the injection device; The holding furnace and the melting cylinder are provided with a plurality of heaters surrounding the melting cylinder and the lower end outer periphery of the holding furnace, and the holding furnace is connected to an alloy melting furnace via an input pipeline; An integrated system of a melting device and a liquid injection mechanism, characterized in that raw materials or alloy materials are melted in the alloy melting furnace to form molten alloy, the molten alloy is sent into the holding furnace through the input pipeline, flows into the melting cylinder, is heated by the multiple heaters to keep the molten alloy warm, and then flows into the injection device again, and is extruded and injected from the front end of the injection device by operating the drive device, so that the molten alloy enters the jig and tool device and is cooled and formed.

2. 2. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 1, wherein the holding furnace has an upper end with an upper flange, an outer lid above the upper flange, a lower flange at the lower end of the upper end, cooling water input / output channels at the upper end of the outer lid, and cooling water input / output channels surrounding and covering the outer wall of the holding furnace between the upper flange and the lower flange, the cooling water input / output channels communicating with the cooling water input / output channels, and cooling water flowing between the cooling water input / output channels and the cooling water input / output channels provides a thermal insulation effect for the lower flange.

3. 3. The integrated system of melting apparatus and liquid injection mechanism according to claim 2, characterized in that an O-ring is further provided above the upper edge of the upper end of the holding furnace, and the O-ring is provided between the upper edge and the outer lid, so that the installation of the O-ring provides the holding furnace with better airtightness.

4. 4. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 3, further comprising a differential pressure sensor provided in the holding furnace, the differential pressure sensor being connected to a control electric circuit on the machine base to measure the differential pressure within the holding furnace and configured to be able to predict pressure changes within the holding furnace.

5. 5. The integrated system of melting equipment and liquid injection mechanism of claim 4, wherein at least one temperature detector is further provided in the holding furnace, and the temperature detector is connected to a control electric circuit on the machine base to measure temperature changes in the holding furnace.

6. 6. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 5, further comprising at least one liquid level detector in the holding furnace, the liquid level detector being connected to a control electric circuit on the machine base to measure the liquid level of the molten alloy in the holding furnace and configured to be able to predict changes in the liquid level of the molten alloy in the holding furnace.

7. 7. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 6, wherein the molten alloy is transferred from the alloy melting furnace through the input pipeline into the holding furnace by tilting the crucible, the earth's gravity, a metering pump, a differential pressure of an inert gas, or a piston system.

8. 8. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 7, wherein the alloy melting furnace melts raw materials or alloy materials to produce molten alloy, the alloy materials being magnesium alloy billets, and the magnesium alloy billets being magnesium-lithium alloy billets or magnesium-lithium-aluminum alloy billets.

9. 9. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 8, wherein at least three ports are provided on the outer cover at the upper end of the holding furnace, and one of the ports is connected to the alloy melting furnace via the input pipe.

10. 10. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 9, wherein an upper isolation valve is provided at a connection point between the input pipeline and the holding furnace, an upper cooling water channel for thermal insulation is covered around the outer periphery of the upper isolation valve, an expansion pipe is connected to a lower end of the upper isolation valve, an inner sleeve pipe is connected to the inside of the expansion pipe for guiding the flow of the molten alloy and preventing splashing, a lower isolation valve is connected to the outside of the inner sleeve pipe, and a lower isolation valve is connected to the outside of the lower isolation valve, and a lower cooling water channel for thermal insulation is covered around the outer periphery of the lower isolation valve.

11. 11. The integrated system of a melting device and a liquid injection mechanism according to claim 10, wherein the telescopic tube is made of a steel material, and the inner sleeve tube is made of a heat-resistant material such as a steel material or ceramic.

12. 12. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 11, further comprising: a vacuum pump provided outside another one of the at least three vent holes on the outer cover at the top end of the holding furnace; the vacuum pump creating a vacuum in the holding furnace and drawing out moisture and air from the holding furnace, thereby reducing moisture and oxygen in the alloy melting furnace, the input pipe, and the holding furnace, and improving the slag foaming phenomenon of an oxide film formed from the molten alloy in the alloy melting furnace, the input pipe, and the holding furnace; and generating a negative pressure or pressure difference using the vacuum pump, which allows the molten alloy to be more smoothly drawn from the alloy melting furnace via the input pipe by the Earth's gravity and the negative pressure or pressure difference, and delivered to the holding furnace.

13. 13. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 12, wherein a protective gas piping path is provided on yet another one of the at least three vent holes on the outer cover at the upper end of the holding furnace, and the alloy melting furnace supplies air or an inert gas through the protective gas piping path, thereby reducing moisture and oxygen in the alloy melting furnace, the input pipe line, and the holding furnace and bringing them into contact with the molten alloy, thereby improving the slag foaming phenomenon of oxide films that occur in the alloy melting furnace, the input pipe line, and the holding furnace.

14. 14. The integrated system of melting device and liquid injection mechanism according to claim 13, wherein the inert gas is argon gas.

15. 15. The integrated system of a melting apparatus and a liquid injection mechanism as described in claim 14, wherein the molten alloy is fed from the alloy melting furnace through the input pipeline into the holding furnaces of a plurality of different machines, and injection molding of different or the same alloy can be performed using the same or different jig and tooling devices.

16. 16. The integrated system of melting device and liquid injection mechanism according to claim 15, wherein the driving device is an injection hydraulic cylinder or an injection pneumatic cylinder.

17. 17. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 16, wherein the alloy melting furnace is equipped with a stirring device for stirring the molten metal.

18. 18. The integrated system of a melting apparatus and a liquid injection mechanism according to claim 17, further comprising a lifting device provided below the alloy melting furnace for raising or lowering the height of the alloy melting furnace.

19. 1. An injection method for an integrated system of a melting device and a liquid injection mechanism, comprising: step 1: melting raw materials or alloy materials in an alloy melting furnace to form molten alloy; step 2: feeding the molten alloy into a holding furnace through an input pipeline, flowing into a melting cylinder, keeping the molten alloy warm by heating with a plurality of heaters, and then flowing back into an injection device; step 3: operating a drive device of the injection device to extrude and inject the molten alloy from the front end of the injection device; and step 4: introducing the molten alloy into a jig and tooling device to cool and shape it, thereby completing the injection molding of the alloy.

20. 20. The injection method of the integrated system of melting apparatus and liquid injection mechanism according to claim 19, characterized in that raw material or alloy material is melted in the alloy melting furnace to become the molten alloy, and the molten alloy is fed into the holding furnace via an input pipeline by negative pressure or a pressure difference.

21. 20. The injection method of the integrated system of melting apparatus and liquid injection mechanism according to claim 19, characterized in that raw materials or alloy materials are melted in the alloy melting furnace to become the molten alloy, and the molten alloy is fed into the holding furnace through an input pipeline by tilting a crucible, the earth's gravity, a metering pump, a differential pressure of an inert gas, or a piston type.

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