Die-casting forming assembly, die-casting machine and die-casting forming method

Abstract

The invention provides a die-casting forming assembly, a die-casting machine and a die-casting forming method, and can be applied to the technical field of die casting. The die-casting forming assembly comprises a die unit, an injection unit and a first heating unit, the die unit comprises a male die core and a female die core, the male die core and the female die core form a cavity in a die assembly state, the cavity is communicated with the injection unit, and cooling runners allowing cooling liquid to flow are formed in the male die core and the female die core; the injection unit is used for injecting the metal slurry in a semi-solid state into the cavity; wherein the first heating unit is used for heating the metal slurry in the cavity, so that the metal slurry in the cavity is kept in a semi-solid state; and the cooling unit is used for introducing cooling liquid into the cooling runner after injection filling is completed, so that the metal slurry in the cavity is cooled and formed. The die casting with uniform crystallization, compact structure and uniform surface quality can be obtained, and the surface quality of the die casting is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of die casting technology, and in particular to a die casting molding component, a die casting machine and a die casting molding method. Background Art

[0002] Die casting is a metal casting method that uses high pressure to inject molten metal or alloy into a special mold and allow it to cool and solidify to finally obtain the desired product.

[0003] Existing die castings are often formed using a cold chamber die casting process. Due to the uneven grain size of the die castings formed by the cold chamber die casting process, the surface quality thereof is poor. Summary of the invention

[0004] The present application provides a die-casting molding component, a die-casting machine and a die-casting molding method, which are used to solve the technical problem of poor surface quality of existing die-casting parts.

[0005] According to a first aspect disclosed in the present application, the present application provides a die-casting molding assembly, comprising a mold unit, an injection unit and a first heating unit, wherein the mold unit comprises a male mold core and a female mold core, wherein the male mold core and the female mold core form a cavity in a mold-closing state, wherein the cavity is connected to the injection unit, and wherein the male mold core and the female mold core are provided with cooling channels for the flow of coolant;

[0006] The injection unit is used to inject the metal slurry in a semi-solid state into the cavity; wherein the first heating unit is used to heat the metal slurry in the cavity so as to keep the metal slurry in the cavity in a semi-solid state;

[0007] The cooling unit is used to pass cooling liquid into the cooling channel after injection molding is completed, so as to cool the metal slurry in the cavity and form it.

[0008] In a feasible implementation manner, the injection unit comprises a loading cylinder, an injection cylinder, a push rod and a second heating unit, and the loading cylinder stores metal slurry in a semi-solid state;

[0009] The feeding cylinder is connected to the injection cylinder so as to be used for feeding the metal slurry into the injection cylinder;

[0010] The second heating unit is used to heat the metal slurry in the upper barrel so that the metal slurry in the upper barrel remains in a semi-solid state;

[0011] The push rod is arranged in the injection cylinder and can move axially along the injection cylinder. A punch is provided at one end of the push rod. The punch is used to move axially along the injection cylinder to inject the metal slurry into the cavity.

[0012] In a feasible implementation manner, the second heating unit includes a second heating coil, and the second heating coil is arranged around the loading barrel.

[0013] In a feasible implementation manner, the injection unit includes a loading cylinder, an injection cylinder, a screw and a second heating unit, the loading cylinder stores metal particles, and a spiral blade is disposed on the outer periphery of the screw;

[0014] The feeding cylinder is connected to the injection cylinder so as to be used for feeding the metal particles into the injection cylinder;

[0015] The second heating unit is used to heat the metal particles in the injection cylinder to heat the metal particles into a metal slurry in a semi-solid state;

[0016] The screw is arranged in the injection cylinder and can rotate along the axial direction of the injection cylinder to inject the metal slurry into the mold cavity.

[0017] In a feasible implementation manner, the second heating unit includes a second heating coil, and the second heating coil is arranged around the injection cylinder.

[0018] In a feasible implementation manner, the first heating unit includes a first heating coil, and the first heating coil is disposed around the mold unit.

[0019] In a feasible implementation manner, a feeding port is provided at the lower end of the upper cylinder, a feeding port is provided on the injection cylinder, and the feeding port is communicated with the feeding port.

[0020] In a feasible embodiment, the die-casting molding component also includes a frequency conversion controller, which is electrically connected to the first heating coil and the second heating coil respectively, and the frequency conversion controller is used to control the alternating current frequency of the first heating coil and the second heating coil.

[0021] In a feasible implementation manner, the die-casting molding assembly further includes a mold temperature controller;

[0022] The mold temperature controller is installed on the mold unit to monitor the temperature of the mold unit;

[0023] The mold temperature controller is electrically connected to the frequency conversion controller.

[0024] In a feasible implementation manner, the mold temperature controller is also electrically connected to the cooling unit.

[0025] In a feasible implementation manner, the coolant is an oily coolant.

[0026] According to a second aspect disclosed in the present application, the present application provides a die-casting machine, comprising the die-casting molding assembly described in the first aspect.

[0027] According to a third aspect disclosed in the present application, the present application provides a die-casting method, which is applied to the die-casting component described in the first aspect, comprising:

[0028] The injection unit injects the metal slurry in a semi-solid state into the cavity; wherein, during the injection filling process, the first heating unit is used to heat the metal slurry in the cavity so that the metal slurry in the cavity remains in a semi-solid state;

[0029] After the injection filling is completed, the first heating unit stops heating the metal slurry in the cavity, and uses the cooling unit to pass cooling liquid into the cooling channel of the mold unit to cool the metal slurry in the cavity.

[0030] In a feasible embodiment, the injection unit includes a loading cylinder, an injection cylinder and a second heating unit, wherein the loading cylinder stores metal slurry in a semi-solid state; the loading cylinder is connected to the injection cylinder to be used for feeding the metal slurry into the injection cylinder; before the injection unit injects the metal slurry in a semi-solid state into the mold cavity, the method further includes:

[0031] The second heating unit heats the metal slurry in the upper cylinder to keep the metal slurry in the upper cylinder in a semi-solid state.

[0032] In a feasible implementation manner, the injection unit includes a loading cylinder, an injection cylinder and a second heating unit, wherein the loading cylinder stores metal particles; the loading cylinder is connected to the injection cylinder to be used for feeding the metal particles into the injection cylinder; before the injection unit injects the metal slurry in a semi-solid state into the mold cavity, the method further includes:

[0033] The second heating unit heats the metal particles in the injection cylinder to heat the metal particles into a metal slurry in a semi-solid state.

[0034] Compared with the prior art, this application has the following beneficial effects:

[0035] The present application provides a die-casting molding component, a die-casting machine and a die-casting molding method. By keeping the metal slurry in a semi-solid state during the injection filling process, the metal slurry in the semi-solid state has good fluidity and can flow and fill the cavity in a manner close to laminar flow, so as to effectively avoid slag inclusions and sand holes in the die-casting. After the injection filling is completed, the semi-solid metal slurry is cooled and formed to obtain a die-casting with uniform crystallization, dense structure and uniform surface quality, which effectively improves the surface quality of the die-casting and improves the mechanical properties of the die-casting. In addition, the semi-solid metal slurry has good fluidity and is easy to form die-castings with more complex shapes, more precise dimensions and thinner thickness to better meet the lightweight requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] Figure 1 A schematic structural diagram of a die-casting component provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of another die-casting component provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the structure of a die-casting component provided in an embodiment of the present application in a state of injection filling;

[0040] Figure 4 A schematic flow chart of a die-casting method provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 100 - first heating coil;

[0043] 200-injection unit;

[0044] 210 - putter;

[0045] 220-punch;

[0046] 230-loading barrel;

[0047] 240 - second heating coil;

[0048] 250-pressing cylinder;

[0049] 260-screw;

[0050] 270-Spiral blade;

[0051] 300-die unit;

[0052] 310-Gongmoren;

[0053] 320-cavity;

[0054] 330-mother mold core;

[0055] 340-cooling channel;

[0056] 400-Mold temperature controller;

[0057] 500-Cooling unit;

[0058] 600- frequency conversion controller;

[0059] 700-fixed die plate;

[0060] 800-Moving mold plate.

[0061] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0062] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0063] Die casting is a metal casting method that uses high pressure to inject molten metal or alloy into a special mold and allow it to cool and solidify to eventually obtain the desired product. This technology is suitable for producing large quantities of parts.

[0064] In the existing die-casting process, the cold chamber die-casting process is often used. The cold chamber die-casting process uses a special die-casting machine to quickly inject the preheated metal into the mold under high pressure, and cool the casting into shape in a short time. However, the cold chamber die-casting process has dendrites during the die-casting crystallization process, resulting in weak structural strength of the die-casting, more sand holes, uneven grain size of the die-casting, severe oxidation of the surface quenching layer, and uneven surface quality of the die-casting.

[0065] Therefore, existing die castings have the problem of poor surface quality.

[0066] In addition, with the continuous development of electronic products, users now have higher and higher requirements for lightweight products such as notebooks and mobile phones. The die-casting parts produced by the traditional cold chamber die-casting process still have the problems of thick thickness (usually more than 1.0mm) and high unit weight of the product, which is not suitable for the lightweight needs of current users.

[0067] In response to the above technical problems, the present application proposes a die-casting molding component, a die-casting machine and a die-casting molding method. By enabling the metal slurry to maintain a semi-solid state during the injection filling process, the die-casting parts have the advantages of improved mechanical properties, uniform crystallization, dense structure, and uniform surface quality, thereby effectively improving the quality of the die-casting parts.

[0068] The technical solutions of the die-casting molding assembly, die-casting machine and die-casting molding method provided by the present application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist alone or in combination with each other, and the same or similar contents may not be repeated in different embodiments.

[0069] Figure 1 A schematic diagram of the structure of a die-casting component provided in an embodiment of the present application, see Figure 1 In some embodiments, the die-casting molding assembly includes a mold unit 300, an injection unit 200 and a first heating unit. The mold unit 300 includes a male mold core 310 and a female mold core 330. The male mold core 310 and the female mold core 330 form a cavity 320 in a mold closing state. The cavity 320 is connected to the injection unit 200. The male mold core 310 and the female mold core 330 are provided with a cooling channel 340 for the flow of coolant. The injection unit 200 is used to inject metal slurry in a semi-solid state into the cavity 320. The first heating unit is used to heat the metal slurry in the cavity 320 so that the metal slurry in the cavity 320 is kept in a semi-solid state. The cooling unit 500 is used to pass coolant into the cooling channel 340 after the injection filling is completed so that the metal slurry in the cavity 320 is cooled and formed.

[0070] Specifically, the male mold core 310 is usually not fixed in the die-casting mold, but a part that can move relative to the female mold core 330, mainly used to form the internal shape or recessed part of the die-casting, and help the die-casting to be demolded when the mold is opened. The female mold core 330 is usually a fixed part in the die-casting mold, mainly used to form the external shape or protruding part of the die-casting, and is the main part of the die-casting molding. The female mold core 330 is usually opposite to the male mold core 310, and the two are tightly matched when the mold is closed, and together form a cavity 320 for the complete shape of the die-casting product, ensuring that the shape and size of the product meet the design requirements. Among them, when the mold unit 300 is molded or opened, the female mold core 330 remains stationary, and the male mold core 310 moves to mold or open with the female mold core 330. According to the different positions of the female mold core 330, the male mold core 310 can complete the mold closing or opening operation with the female mold core 330 by horizontal movement or vertical movement.

[0071] Specifically, the mold cavity 320 refers to a hollow portion used for casting molding, and its shape and size correspond to the casting to be molded. During the die casting process, the mold cavity 320 is filled with metal slurry, and the metal slurry is fully filled in the mold cavity 320 space through the pressure of the mold, and the die casting is formed after cooling and hardening.

[0072] Specifically, the metal slurry in a semi-solid state is injected into the cavity 320 formed by the mold unit 300 by the injection unit 200 at a set injection speed and injection pressure.

[0073] Specifically, the first heating unit is used to maintain the temperature of the metal slurry in the cavity 320 in the process of injection filling within a temperature range where solid and liquid coexist, so that the metal slurry is in a semi-solid state, thereby improving the surface quality of the subsequent die-casting by improving the fluidity of the metal slurry. The semi-solid state refers to the metal slurry having a certain solid phase ratio.

[0074] In this embodiment, combined with Figure 1 and Figure 3 By keeping the metal slurry in a semi-solid state during the injection filling process, the metal slurry in the semi-solid state has good fluidity and can flow and fill the cavity 320 in a manner close to laminar flow, so as to effectively avoid slag inclusions and sand holes in the die casting. After the injection filling is completed, the semi-solid metal slurry is cooled and formed to obtain a die casting with uniform crystallization, dense structure and uniform surface quality, which effectively improves the surface quality of the die casting and improves the mechanical properties of the die casting. In addition, the semi-solid metal slurry has good fluidity and is easy to form die castings with more complex shapes, more precise dimensions and thinner thickness to better meet the lightweight requirements.

[0075] At the same time, the metal slurry is heated in the closed cavity 320 formed by the mold unit 300, which reduces the contact between the die-casting and oxygen, avoids oxidation of the die-casting machine surface, and makes the surface quality of the die-casting more uniform. The uniform surface quality can make the die-casting have the advantages of uniform sandblasting and good consistency of anode effect during subsequent sandblasting and anodizing treatment.

[0076] Specifically, sandblasting can effectively remove defects such as oxide scale, dirt, unmelted metal surface oxide scale, glare and burrs on the surface of die castings, making the surface smoother and more uniform.

[0077] Anodizing refers to the anodizing process, which is an electrochemical process widely used in metal surface treatment. This process mainly forms a dense oxide film on the surface of the die-casting through electrolysis. The formed oxide film has high hardness and good wear resistance, which can effectively improve the corrosion resistance and wear resistance of the die-casting products.

[0078] The uniform surface quality of the die-casting can make the die-casting machine have uniform roughness during the subsequent sandblasting treatment. The die-casting machine with uniform roughness can form a uniform and dense oxide film on the die-casting during the subsequent anodizing treatment, thereby improving the corrosion resistance and wear resistance of the die-casting, and ensuring the consistency of the appearance of the die-casting.

[0079] Optionally, the semi-solid metal slurry is an alloy having two phases of solid and liquid, such as aluminum alloy slurry, magnesium alloy slurry, and the like.

[0080] See also Figure 1 In some embodiments, the injection unit 200 includes a loading cylinder 230, an injection cylinder 250, a push rod 210 and a second heating unit. The loading cylinder 230 stores metal slurry in a semi-solid state; the loading cylinder 230 is connected to the injection cylinder 250 so as to feed the metal slurry into the injection cylinder 250; the second heating unit is used to heat the metal slurry in the loading cylinder 230 so as to keep the metal slurry in the loading cylinder 230 in a semi-solid state; the push rod 210 is disposed in the injection cylinder 250 and can move axially along the injection cylinder 250. A punch 220 is provided at one end of the push rod 210, and the punch 220 is used to move axially along the injection cylinder 250 to inject the metal slurry into the cavity 320.

[0081] In this embodiment, during the injection filling process, the upper barrel 230 puts a preset amount of metal slurry into the injection barrel 250, and then the push rod 210 drives the punch 220 to push the metal slurry into the cavity 320 of the mold unit 300. The second heating unit can heat the metal slurry in the upper barrel 230 so that the metal slurry in the upper barrel 230 can remain in a semi-solid state.

[0082] The punch 220 and the push rod 210 hydraulically inject the metal slurry into the cavity 320 by pushing. The push rod 210 can generate a large injection force, which helps the metal slurry to better fill the cavity 320 of the mold unit 300, improve the density and forming quality of the die casting; the push rod 210 has a fast response speed, which can quickly push the metal slurry into the cavity 320, reduce the filling time, and improve the die casting production efficiency; the push rod 210 has a relatively simple structure, which makes it stable in operation and easy to maintain.

[0083] Optionally, the second heating unit includes a second heating coil 240 , and the second heating coil 240 is disposed around the loading barrel 230 .

[0084] The metal slurry in the loading barrel 230 is eddy-current heated by a heating coil. The eddy-current heating makes the semi-solid temperature range of the metal slurry controllable. Moreover, the eddy-current heating can heat the metal slurry faster and achieve higher thermal efficiency.

[0085] Specifically, the push rod 210 is driven by a hydraulic cylinder. The hydraulic cylinder converts the pressure energy of the liquid into mechanical energy, and can generate a large driving force or driving torque. This high power density ratio enables the hydraulic cylinder to easily cope with a large load and high pressure working environment when the push rod 210 is pushed, ensuring the stability and reliability of the injection process. In addition, the hydraulic cylinder also has the characteristics of simple speed regulation, and can achieve stepless speed regulation in a wide range. By adjusting the parameters of the hydraulic system, the precise control of the injection speed can be easily achieved to meet different production needs.

[0086] See also Figure 2 In some embodiments, the injection unit 200 includes a loading cylinder 230, an injection cylinder 250, a screw 260 and a second heating unit. The loading cylinder 230 stores metal particles, and a spiral blade 270 is provided on the periphery of the screw 260. The loading cylinder 230 is connected with the injection cylinder 250 to put metal particles into the injection cylinder 250. The second heating unit is used to heat the metal particles in the injection cylinder 250 to heat the metal particles into a semi-solid metal slurry. The screw 260 is arranged in the injection cylinder 250 and can rotate along the axial direction of the injection cylinder 250 to inject the metal slurry into the cavity 320.

[0087] Among them, during the injection filling process, the loading cylinder 230 puts a preset amount of metal particles into the injection cylinder 250. During the rotation of the screw 260 in the injection cylinder 250, the metal particles can be transported through the spiral blades 270, and the metal particles in the injection cylinder 250 are heated by the second heating unit to heat the metal particles into a semi-solid metal slurry and transport it to the cavity 320 of the mold unit 300.

[0088] The spiral blade 270 and the screw 260 inject the metal slurry into the cavity 320 by means of spiral conveying. The spiral conveying and injection of the screw 260 smoothly conveys the metal slurry to the cavity 320 of the mold unit 300 through the rotation and propulsion of the screw 260, which reduces the fluctuation and splashing of the metal slurry during the conveying process and improves the filling effect; during the spiral conveying and injection process of the screw 260, the metal slurry can be more evenly mixed under the stirring of the screw 260, which helps to eliminate the gas and inclusions in the metal slurry and improve the quality of the die casting.

[0089] Optionally, the second heating unit includes a second heating coil 240 , and the second heating coil 240 is disposed around the injection cylinder 250 .

[0090] The heating coil is used to perform eddy current heating on the metal particles in the injection cylinder 250. The eddy current heating allows the metal particles to heat up faster and have higher thermal efficiency, and can quickly heat the metal particles to a semi-solid metal slurry.

[0091] Specifically, the screw 260 is driven by a reduction motor, which reduces the rotation speed and increases the torque through a reduction device (such as a gear box), thereby driving the screw 260 to rotate, and the injection speed and injection amount can be controlled by adjusting the rotation speed and advancement speed of the screw 260, making the injection filling process more precise and controllable.

[0092] See also Figure 1 In some embodiments, a feeding port is provided at the lower end of the upper cylinder 230, and a feeding port is provided on the injection cylinder 250, and the feeding port is connected to the feeding port.

[0093] In this embodiment, the loading cylinder 230 is arranged above the injection cylinder 250 and is connected with the feeding port of the injection cylinder 250 through the feeding port to facilitate the loading of the loading cylinder 230 .

[0094] Specifically, the shot cylinder 250 is horizontally disposed, and an opening at one end of the shot cylinder 250 is in communication with the mold cavity 320 , so as to allow the metal slurry to enter the mold cavity 320 along the shot cylinder 250 .

[0095] See also Figure 1 and Figure 2 In some embodiments, the first heating unit includes a first heating coil 100 , and the first heating coil 100 is disposed around the mold unit 300 .

[0096] The metal slurry is eddy-current heated by a heating coil, and the eddy-current heating makes the semi-solid temperature range of the metal slurry in the cavity 320 controllable. And because the resistivity of the metal slurry (such as aluminum alloy slurry) is lower than that of the mold material, the metal slurry is heated faster and has higher thermal efficiency by using eddy-current heating.

[0097] Furthermore, by controlling the current intensity of the eddy currents and the resistance of the conductor, precise control of the heating process can be achieved.

[0098] Specifically, since the female mold core 330 will remain stationary when the mold unit 300 performs mold opening and mold closing, the first heating coil 100 can be arranged around the female mold core 330 to prevent the first heating coil 100 from affecting the mold opening and mold closing operations of the mold unit 300.

[0099] See also Figure 1 Optionally, the die-casting component also includes a frequency conversion controller 600, which is electrically connected to the first heating coil 100 and the second heating coil 240 respectively, and the frequency conversion controller 600 is used to control the alternating current frequency of the first heating coil 100 and the second heating coil 240.

[0100] Among them, the frequency conversion controller 600 controls the current frequency in the heating coil by adjusting the frequency of the power supply. Since eddy current heating is based on the principle of electromagnetic induction, the size and distribution of the induced current (eddy current) are closely related to the frequency of change of the magnetic field. Therefore, through frequency conversion control, the size and distribution of the eddy current can be flexibly adjusted to affect the heating effect. For example, in the early stage of heating, a higher frequency can be used to quickly increase the temperature of the metal slurry; in the later stage of heating, the frequency can be reduced to slow down the heating speed and avoid problems such as overheating or uneven temperature.

[0101] Specifically, the frequency of the alternating current is between 1 KHz and 100 MHz.

[0102] See also Figure 1 Optionally, the die-casting molding assembly further includes a mold temperature controller 400 ; the temperature controller is mounted on the mold unit 300 to monitor the temperature of the mold unit 300 ; the mold temperature controller 400 is electrically connected to the frequency conversion controller 600 .

[0103] The mold temperature controller 400 can monitor the temperature of the mold, and when the mold temperature is too high or too low, it can work in conjunction with the frequency conversion controller 600 to adjust the heating temperature of the first heating coil 100 .

[0104] The mold temperature controller 400 can accurately control the temperature of the mold, thereby affecting the temperature of the metal slurry in the cavity 320. The appropriate temperature helps the metal slurry maintain a semi-solid state, ensuring the smooth progress of the injection filling process.

[0105] See also Figure 1 Optionally, the mold temperature controller 400 is also electrically connected to the cooling unit 500 .

[0106] The mold temperature controller 400 may also be linked with the cooling unit 500 to control the cooling speed of the metal slurry by controlling the flow rate of the coolant and other methods.

[0107] By controlling the mold temperature, the cooling rate of the metal slurry can be affected, which in turn affects the crystallization state and sequence of the die casting. The appropriate cooling rate helps to reduce defects inside the die casting, such as bubbles, shrinkage holes, etc.

[0108] Specifically, the cooling unit 500 generally includes a liquid storage tank, an infusion pump, an infusion pipeline, and a valve assembly. The liquid storage tank stores coolant for circulation by the cooling unit 500; the infusion pump provides power to circulate the coolant; the infusion pipeline connects the liquid storage tank, the infusion pump, and the mold unit 300 to form a complete coolant circulation path; the valve assembly includes valves such as a one-way valve, a water outlet solenoid valve, a throttle valve, and a stop valve, which are used to control the flow direction and flow of the coolant to ensure that the cooling unit 500 operates in a predetermined manner.

[0109] Optionally, the coolant is an oil-based coolant.

[0110] Among them, during the die-casting process, the metal slurry is injected into the cavity 320 of the mold unit 300 under high pressure, which will generate a large amount of heat. The coolant can effectively absorb and take away this heat, reduce the temperature of the mold and the casting, and prevent defects such as deformation and cracks of the casting caused by excessive temperature. The boiling point of oily coolants is usually higher than that of aqueous coolants, which means that in high temperature environments, oily coolants can more effectively maintain their cooling performance and improve the cooling effect. Oily coolants also usually have better thermal conductivity, and can more effectively transfer heat from the mold unit 300 to the cooling unit 500, thereby improving cooling efficiency.

[0111] In some embodiments, the present application also provides a die-casting machine, which includes the above-mentioned die-casting molding assembly.

[0112] In this embodiment, the die-casting machine having the above-mentioned die-casting molding component maintains the metal slurry in a semi-solid state during the injection filling process. The metal slurry in the semi-solid state has good fluidity during injection, thereby obtaining a die-casting with improved mechanical properties, uniform crystallization, dense structure, and uniform surface quality after die-casting.

[0113] See also Figure 3 Optionally, the die-casting machine further includes a movable die sleeve plate 800 for mounting the male die core 310 , and a fixed die seat plate 700 for mounting the female die core 330 .

[0114] The movable mold plate 800 (B plate) mainly plays the role of fixing and supporting the male mold core 310, and bears the tensile, bending, compression and other stresses generated by the mold during the die-casting process. At the same time, the movable mold plate 800 can be moved during the opening and closing process of the mold.

[0115] The fixed mold base plate 700 (A plate) is used to support and fix the female mold core 330. Different from the movable mold sleeve plate 800, the fixed mold base plate 700 is immovable. The fixed mold base plate 700 plays a key role in mold closing to ensure the accuracy and stability of the mold.

[0116] Figure 4 A schematic diagram of a die-casting method provided in an embodiment of the present application is shown in FIG. Figure 4 In some embodiments, the die-casting method is applied to the above-mentioned die-casting component, and the process of the method includes the following steps:

[0117] S401, the injection unit injects the metal slurry in a semi-solid state into the cavity; wherein, during the injection filling process, the metal slurry in the cavity is heated by the first heating unit to keep the metal slurry in the cavity in a semi-solid state.

[0118] During the entire injection filling process, due to the heating effect of the first heating unit, the temperature of the metal slurry in the cavity is always maintained in the semi-solid temperature range where solid and liquid coexist, and is in a semi-solid state with good fluidity. By maintaining good fluidity of the metal slurry, slag inclusions and sand holes in subsequent die castings can be reduced. At the same time, the metal slurry can always maintain good fluidity in the cavity, and the die casting can be made thinner and more precise.

[0119] In addition, since the metal slurry is heated in the closed cavity of the mold unit, the contact between the metal slurry and oxygen is reduced, thereby avoiding oxidation of the surface of the die-casting, further improving the surface quality of the die-casting, and facilitating the subsequent sandblasting and anodizing treatment of the die-casting.

[0120] At the same time, during the injection filling process, since the metal slurry in the cavity will always remain heated, no coolant will flow through the cooling channel of the mold unit.

[0121] S402, after the injection filling is completed, the first heating unit stops heating the metal slurry in the cavity, and uses the cooling unit to pass cooling liquid into the cooling channel of the mold unit to cool the metal slurry in the cavity.

[0122] Among them, after the injection filling is completed, the first heating unit stops heating the metal slurry in the cavity, and at the same time uses the cooling unit to introduce coolant into the cooling flow channels of the male mold core and the female mold core, and uses the coolant to quickly cool the metal slurry in the cavity, so that the metal slurry is quickly cooled and formed, so as to refine the crystal grains of the casting and improve the mechanical properties of the die-casting.

[0123] Optionally, when the next die-casting heating is performed, the coolant can be drained from the cooling channel by high-pressure steam or the like to prevent the coolant from affecting the heating efficiency of the first heating unit during the next die-casting.

[0124] In this embodiment, by keeping the metal slurry in a semi-solid state during the injection filling process, the metal slurry in the semi-solid state has good fluidity and can flow and fill the cavity in a near-laminar manner to effectively avoid slag inclusions and sand holes in the die casting. After the injection filling is completed, the semi-solid metal slurry is cooled and formed to obtain a die casting with uniform crystallization, dense structure, and uniform surface quality, which effectively improves the surface quality of the die casting and improves the mechanical properties of the die casting. In addition, the semi-solid metal slurry has good fluidity and is easy to form die castings with more complex shapes, more precise dimensions, and thinner thicknesses to better meet the lightweight requirements.

[0125] In some embodiments, the injection unit includes a loading cylinder, an injection cylinder, and a second heating unit, wherein the loading cylinder stores metal slurry in a semi-solid state; the loading cylinder is connected to the injection cylinder to be used for feeding the metal slurry into the injection cylinder; before the injection unit injects the metal slurry in a semi-solid state into the mold cavity, the die casting method further includes:

[0126] The second heating unit heats the metal slurry in the upper barrel to keep the metal slurry in the upper barrel in a semi-solid state.

[0127] In this embodiment, the upper barrel stores metal slurry in a semi-solid state. At this time, the metal slurry in the upper barrel needs to be heated by the second heating unit to keep the metal slurry in the upper barrel in a semi-solid state to facilitate subsequent injection filling.

[0128] In some embodiments, the injection unit includes a loading cylinder, an injection cylinder, and a second heating unit, wherein metal particles are stored in the loading cylinder; the loading cylinder is connected to the injection cylinder to be used for feeding metal particles into the injection cylinder; before the injection unit injects the semi-solid metal slurry into the mold cavity, the die casting method further includes:

[0129] The second heating unit heats the metal particles in the injection cylinder to heat the metal particles into a metal slurry in a semi-solid state.

[0130] In this embodiment, metal particles in a solid state are stored in the upper barrel. At this time, the metal particles in the injection barrel need to be heated by the second heating unit to heat the metal particles into a semi-solid metal slurry, and then the heated prepared metal slurry is injected into the mold cavity.

[0131] In the description of the present application, 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", "axial", "radial", "circumferential" 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 application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0132] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0133] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0134] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0135] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0136] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A die-casting component, characterized in that: The mold unit comprises a mold unit, an injection unit and a first heating unit, wherein the mold unit comprises a male mold core and a female mold core, wherein the male mold core and the female mold core form a cavity in a mold-closing state, wherein the cavity is connected to the injection unit, and wherein the male mold core and the female mold core are provided with cooling channels for the flow of coolant; The injection unit is used to inject the metal slurry in a semi-solid state into the cavity; wherein the first heating unit is used to heat the metal slurry in the cavity so as to keep the metal slurry in the cavity in a semi-solid state; The cooling unit is used to pass cooling liquid into the cooling channel after injection molding is completed, so as to cool the metal slurry in the cavity and form it.

2. The die-casting component according to claim 1, characterized in that: The injection unit comprises a loading cylinder, an injection cylinder, a push rod and a second heating unit, wherein the loading cylinder stores metal slurry in a semi-solid state; The feeding cylinder is connected to the injection cylinder so as to be used for feeding the metal slurry into the injection cylinder; The second heating unit is used to heat the metal slurry in the upper barrel so that the metal slurry in the upper barrel remains in a semi-solid state; The push rod is arranged in the injection cylinder and can move axially along the injection cylinder. A punch is provided at one end of the push rod. The punch is used to move axially along the injection cylinder to inject the metal slurry into the cavity.

3. The die-casting component according to claim 2, characterized in that: The second heating unit includes a second heating coil, and the second heating coil is arranged around the loading cylinder.

4. The die-casting component according to claim 1, characterized in that: The injection unit comprises a loading cylinder, an injection cylinder, a screw and a second heating unit, wherein metal particles are stored in the loading cylinder and spiral blades are arranged on the outer periphery of the screw; The feeding cylinder is connected to the injection cylinder so as to be used for feeding the metal particles into the injection cylinder; The second heating unit is used to heat the metal particles in the injection cylinder to heat the metal particles into a metal slurry in a semi-solid state; The screw is arranged in the injection cylinder and can rotate along the axial direction of the injection cylinder to inject the metal slurry into the mold cavity.

5. The die-casting component according to claim 4, characterized in that: The second heating unit includes a second heating coil, and the second heating coil is arranged around the injection cylinder.

6. The die-casting component according to claim 2 or 4, characterized in that: The lower end of the loading cylinder is provided with a feeding port, and the injection cylinder is provided with a feeding port, and the feeding port is communicated with the feeding port.

7. The die-casting component according to claim 3 or 5, characterized in that: The first heating unit includes a first heating coil, and the first heating coil is disposed around the mold unit.

8. The die-casting component according to claim 7, characterized in that: The die-casting molding component also includes a frequency conversion controller, which is electrically connected to the first heating coil and the second heating coil respectively, and is used to control the alternating current frequency of the first heating coil and the second heating coil.

9. The die-casting component according to claim 8, characterized in that: The die-casting molding assembly also includes a mold temperature controller; The mold temperature controller is installed on the mold unit to monitor the temperature of the mold unit; The mold temperature controller is electrically connected to the frequency conversion controller.

10. The die-casting component according to claim 9, characterized in that: The mold temperature controller is also electrically connected to the cooling unit.

11. The die-casting component according to any one of claims 1 to 5, characterized in that: The coolant is an oily coolant.

12. A die casting machine, characterized in that: It comprises the die-casting component as described in any one of claims 1-11.

13. A die casting method, characterized in that: Applied to the die-casting component according to any one of claims 1 to 11, the method comprises: The injection unit injects the metal slurry in a semi-solid state into the cavity; wherein, during the injection filling process, the first heating unit is used to heat the metal slurry in the cavity so that the metal slurry in the cavity remains in a semi-solid state; After the injection filling is completed, the first heating unit stops heating the metal slurry in the cavity, and uses the cooling unit to pass cooling liquid into the cooling channel of the mold unit to cool the metal slurry in the cavity.

14. The die casting method according to claim 13, characterized in that: The injection unit comprises a loading cylinder, an injection cylinder and a second heating unit, wherein the loading cylinder stores metal slurry in a semi-solid state; the loading cylinder is connected to the injection cylinder to feed the metal slurry into the injection cylinder; Before the injection unit injects the metal slurry in a semi-solid state into the mold cavity, the method further includes: The second heating unit heats the metal slurry in the upper cylinder to keep the metal slurry in the upper cylinder in a semi-solid state.

15. The die casting method according to claim 13, characterized in that: The injection unit comprises a loading cylinder, an injection cylinder and a second heating unit, wherein metal particles are stored in the loading cylinder; the loading cylinder is connected to the injection cylinder to be used for feeding the metal particles into the injection cylinder; Before the injection unit injects the metal slurry in a semi-solid state into the mold cavity, the method further includes: The second heating unit heats the metal particles in the injection cylinder to heat the metal particles into a metal slurry in a semi-solid state.

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