A gravity casting apparatus and method for a heat disc

Abstract

The present application relates to a kind of heating disc gravity casting equipment and method;The heating disc gravity casting equipment includes rack, carousel, multiple sets of processing device, rotary drive device and casting device;Each set of processing device includes support, mold, mold locking mechanism, mold opening and closing mechanism and demolding mechanism;The mold includes fixed die and movable die;After clamping in place, the mold locking mechanism is locked to mold;When processing device rotates to casting station with carousel, the casting device is quantitatively injected into the forming mold cavity Molten aluminum alloy liquid;When the processing device that completes casting reaches unloading station, the mold locking mechanism is released to the locking of mold;The mold opening and closing mechanism drives movable die to open mold, and the demolding mechanism is automatically ejected from the mold cavity The heating disc of forming is automatically ejected from the mold.The heating disc gravity casting equipment of the present application can realize the continuous processing of heating disc, avoid the invalid working hours caused by melt cooling process for operator, greatly improve the processing efficiency of heating disc.

Description

Technical Field

[0001] This invention relates to the field of rice cooker manufacturing, specifically to a gravity casting device and method for heating plates. Background Technology

[0002] The heating plate of a rice cooker is the core heating component. Currently, some rice cooker manufacturers use a semi-manual casting method to form the heating plate. The specific production process is as follows: an operator uses a switch to close the mold, manually pours molten aluminum alloy into the mold, waits for the molten aluminum alloy to cool and solidify in the mold cavity, and then operates a switch to open the mold, removing the cast heating plate from the mold.

[0003] However, in the aforementioned semi-manual casting operation mode, after the operator pours in the molten aluminum alloy, they need to wait for the molten aluminum alloy in the mold cavity to cool and solidify before proceeding with the subsequent mold opening and part removal processes. During this cooling and waiting period, the worker cannot carry out other effective operations, resulting in the ineffective occupation of man-hours. The production cycle of a single workstation is constrained by the cooling time of the molten aluminum alloy, which leads to low overall production efficiency of the heating plate and limited output per unit time, which is not conducive to large-scale industrial production. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gravity casting device for heating plates. This device can realize continuous processing of heating plates, avoid the ineffective waiting time for operators to wait for the melt to cool, break the limitation of cooling time on production cycle, and thus greatly improve the processing efficiency of heating plates.

[0005] The second objective of this invention is to provide a gravity casting method for heating plates.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is:

[0007] A gravity casting device for a heating plate includes a frame, a turntable mounted on the frame, multiple processing devices mounted on the turntable, a rotary drive device for driving the turntable to rotate, and a casting device. The multiple processing devices are arranged along the circumference of the turntable. Each processing device includes a support, a mold mounted on the support, a mold locking mechanism, a mold opening and closing mechanism, and a demolding mechanism. The support is mounted on the turntable. The mold includes a fixed mold and a movable mold. The movable mold is hinged to the support. The mold opening and closing mechanism is drively connected to the movable mold and drives the movable mold relative to the turntable. The fixed mold completes the opening and closing action; after the mold is closed, the locking mechanism locks the interlocking fixed mold and movable mold; the casting device is located at the casting station outside the turntable. When the processing device rotates with the turntable to the casting station, the casting device quantitatively injects molten aluminum alloy into the forming cavity formed after the mold is closed; when the processing device that has completed casting reaches the unloading station, the locking mechanism releases the locking of the fixed mold and movable mold; the opening and closing mechanism drives the movable mold to open, and the demolding mechanism automatically ejects the heating plate formed in the forming cavity and demolds it.

[0008] Preferably, the mold-locking mechanism includes two locking members and a mold-locking drive mechanism. The mold-locking drive mechanism is suspended in the air and has synchronously extendable drive rods on both sides. Each drive rod is hinged to one end of one of the locking members. Mounting seats are provided on both sides of the fixed mold. Each locking member is hinged to the mounting seat on the corresponding side, and the hinge point is located between the two ends of the locking member. The other end of the locking member is provided with a hook. When the mold is closed, the hooks in both sets of locking members abut against the back side of the movable mold. The two locking members and the two drive rods are symmetrically arranged.

[0009] Preferably, the back side of the movable mold is provided with an inclined portion at a position corresponding to the hook portion of the locking member; when the mold is closed, the hook portion presses against the surface of the inclined portion; the extension line of the normal at the center of the contact surface between the inclined portion and the hook portion passes through the axis of the hinge point between the locking member and the mounting base.

[0010] Preferably, the demolding mechanism includes a demolding disc disposed on the back side of the movable mold, ejector pins disposed on the demolding disc, and a demolding drive mechanism for driving the demolding disc to perform linear motion, wherein there are multiple sets of ejector pins; the movable mold is provided with a clearance hole for avoiding the ejector pins; the clearance hole communicates with the mold cavity of the movable mold.

[0011] Preferably, the rotary drive device includes a rotary motor and a transmission box, wherein the rotary motor is mounted on the frame, and the output shaft of the rotary motor is connected to the input shaft of the transmission box via a belt drive mechanism; the output shaft of the transmission box is connected to the turntable.

[0012] Preferably, the mold opening and closing mechanism includes a driving component and a mold opening and closing driving mechanism, wherein the upper end of the driving component is fixed to the back side of the movable mold, and the lower end is hinged to the driving end of the mold opening and closing driving mechanism; the mold opening and closing driving mechanism is mounted on a mounting frame, and the mounting frame is hinged to the bracket.

[0013] Preferably, a connecting member is provided between the driving end of the mold opening and closing driving mechanism and the driving member. One end of the connecting member is mounted on the driving end of the mold opening and closing driving mechanism, and the other end is connected to the lower end of the driving member through a rotating structure. The rotating structure includes a rotating shaft provided on the connecting member and an elongated hole provided at the lower end of the driving member. The rotating shaft passes through the elongated hole, and the outer diameter of the rotating shaft is not greater than the width of the elongated hole.

[0014] Preferably, the mold opening and closing mechanism further includes a self-locking structure, which includes a self-locking component and an elastic component. The self-locking component is disposed below the driving component and is rotatably connected to the bracket via a rotating shaft. The self-locking component includes a rotating part, a self-locking part, and an elastic support part, wherein the rotating part is mounted on the rotating shaft. The elastic component is mounted in the bracket at a position corresponding to the elastic support part of the self-locking component, and the elastic force of the elastic component causes the self-locking part to rotate upward. A notch is provided at the lower end of the driving component. When the mold is closed, the self-locking part abuts against the notch of the driving component, and the extension line of the normal at the center of the contact surface between the self-locking part and the notch of the driving component passes through the axis of the rotating part.

[0015] Preferably, the mold opening and closing mechanism further includes an unlocking structure, which includes an unlocking member disposed on the connector; the unlocking member is located in the connector away from the driving member, and the unlocking member abuts against the upper surface of the self-locking member; the upper surface of the self-locking member is provided with a stepped surface, which divides the upper surface of the self-locking member into a first upper contact surface and a second upper contact surface; when the unlocking member moves from the first upper contact surface to the second upper contact surface, the self-locking member enters and abuts against the notch of the driving member under the elastic force of the elastic member.

[0016] A gravity casting method for a heating plate includes the following steps:

[0017] S1. The mold opening and closing mechanism drives the movable mold to rotate, so that the movable mold cooperates with the fixed mold; after the mold is closed, the mold is locked by the mold locking mechanism.

[0018] S2. The rotary drive device drives the turntable to rotate, and moves the mold with the mold locking completed to the casting station. After the turntable stops and is in place, the casting device injects molten aluminum alloy liquid into the forming cavity of the mold in a metered manner.

[0019] S3. The rotary drive device drives the turntable to continue rotating, transferring the mold that has been cast to the unloading station; the mold locking mechanism releases the lock, the mold opening and closing mechanism drives the movable mold to open, and the demolding mechanism ejects the heating plate formed in the molding cavity and demolds it; at the same time, during the rotation of the turntable, another mold that has been locked is transferred to the casting station, and after the turntable stops and is in place, the casting operation is performed.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The gravity casting equipment for heating plates of the present invention drives multiple sets of processing devices to rotate via a turntable, so that the multiple sets of processing devices move sequentially to the casting station and the unloading station, thereby realizing continuous production of heating plates; the molten cooling is carried out simultaneously during the mold transfer process, thereby avoiding the ineffective idle time of operators due to molten cooling, and relieving the constraint of cooling time on the overall production cycle of the machine, thereby greatly improving the processing efficiency of heating plates.

[0022] 2. The gravity casting equipment for the heating plate of the present invention can automatically complete the mold opening and closing, mold locking, and demolding operations, and automatically inject molten aluminum alloy liquid into the mold forming cavity in a quantitative manner, with a high degree of automation. This can not only improve the processing accuracy and efficiency of the heating plate, but also eliminate the traditional manual operation method of adding molten aluminum alloy liquid, thereby effectively improving the operation safety of operators. Attached Figure Description

[0023] Figure 1 This is a top view of the gravity casting device for the heating plate of the present invention.

[0024] Figure 2 and Figure 3 These are two perspective views (with the casting device hidden) from different angles, representing the first specific embodiment of the gravity casting device for the heating plate of the present invention.

[0025] Figure 4 and Figure 5 These are two different perspective views of the processing device (in the mold-closed state).

[0026] Figure 6 This is a top view of the mold and locking mechanism in a second specific embodiment of the gravity casting device for the heating plate of the present invention.

[0027] Figure 7 This is a magnified view of the hook and inclined sections.

[0028] Figure 8 This is a perspective view (mold closed state) of the processing device in the third specific embodiment of the gravity casting equipment for heating plate of the present invention.

[0029] Figure 9 This is a schematic diagram of the self-locking structure (locked state).

[0030] Figure 10 This is a schematic diagram of the drive component.

[0031] Figure 11 This is a perspective view (mold-opening state) of the processing device in the third specific embodiment of the gravity casting equipment for heating plate of the present invention.

[0032] Figure 12 This is a schematic diagram of a self-locking structure (unlocked state).

[0033] Figure 13 This is a schematic diagram of a self-locking structure (unlocking process).

[0034] In the diagram: 1-Frame, 2-Rotary motor, 3-Belt drive mechanism, 4-Transmission box, 5-Casting device, 6-Turntable, 7-Processing device, 8-Fixed mold, 9-Modible mold, 901-Inclined part; 10-Mold locking drive mechanism; 11-Mounting base; 12-Locking part, 121-Hook part, 13-Mold release drive mechanism, 14-Mold release plate, 15-Ejector pin, 16-Bracket, 17-Mold opening and closing drive mechanism, 18-Driver, 181-Notch, 182-Oblong hole, 19-Connector, 20-Rotating shaft, 21-Elastic part, 22-Self-locking part, 221-First upper contact surface, 222-Self-locking part, 223-Elastic support part, 224-Second upper contact surface, 23-Unlocking part. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Example 1

[0037] See Figures 1-5The gravity casting equipment for heating plates of the present invention includes a frame 1, a turntable 6 mounted on the frame 1, multiple sets of processing devices 7 mounted on the turntable 6, a rotary drive device for driving the turntable 6 to rotate, and a casting device 5; the multiple sets of processing devices 7 are arranged along the circumference of the turntable 6; each set of processing devices 7 includes a support 16, a mold mounted on the support 16, a mold locking mechanism, a mold opening and closing mechanism, and a demolding mechanism; wherein, the support 16 is mounted on the turntable 6; the mold includes a fixed mold 8 and a movable mold 9, the movable mold 9 is hinged to the support 16, and the mold opening and closing mechanism is drively connected to the movable mold 9 for driving the casting device 5. The movable mold 9 completes the opening and closing action relative to the fixed mold 8; after the mold is closed, the locking mechanism locks the interlocking fixed mold 8 and movable mold 9; the casting device 5 is located at the casting station outside the turntable 6. When the processing device 7 rotates with the turntable 6 to the casting station, the casting device 5 injects a quantitative amount of molten aluminum alloy into the forming cavity formed after the mold is closed; when the processing device 7, which has completed casting, reaches the unloading station, the locking mechanism releases the locking of the fixed mold 8 and movable mold 9; the opening and closing mechanism drives the movable mold 9 to open, and the demolding mechanism automatically ejects the heating plate formed in the forming cavity and demolds it.

[0038] See Figures 1-5 The casting device 5 can be an existing casting device, such as injecting molten aluminum alloy liquid into the forming cavity formed after the mold is closed by a robotic arm.

[0039] See Figures 1-5 The mold-locking mechanism includes a locking member 12 and a mold-locking drive mechanism 10. The mold-locking drive mechanism 10 is suspended in mid-air, and the drive rods on both sides of the drive mechanism 10 are respectively hinged to one end of the locking member 12. Mounting seats 11 are provided on both sides of the fixed mold 8. The locking member 12 consists of two sets, each set hinged to the corresponding mounting seat 11, with the hinge point located between the two ends of the locking member 12. The other end of the locking member 12 is provided with a hook portion 121. When the mold is closed, the hook portions 121 of both sets of locking members 12 abut against the back side of the movable mold 9. This configuration offers the following advantages:

[0040] Firstly, in this invention, the locking member 12 is hinged in the middle and mounted on the mounting seats 11 on both sides of the fixed mold 8, so that the locking member 12 forms a lever-type locking structure with the hinge point of the mounting seat 11 as the fulcrum. During the casting process, high-temperature molten aluminum alloy is injected into the forming mold cavity, and the melt generates a large expansion pressure. This expansion pressure acts evenly on the inner side of the movable mold 9 and causes the movable mold 9 to tend to open outward. The opening load is transmitted step by step through the movable mold 9, the hook part 121, and the locking member 12 to the hinge fulcrum position of the locking member 12. Because this invention uses a midpoint hinge... The rigidity of the mounting base 11 ensures that the vertical component of the mold expansion force (i.e., the lateral component perpendicular to the axis of the drive rod) and the overturning moment are mainly borne by the more rigid mounting base 11. The drive rod of the mold clamping drive mechanism 10 only bears the axial tensile force along its own axis and hardly bears the vertical lateral force, bending moment and torsional load. This can effectively prevent the deformation, jamming, fatigue wear and loosening of the drive rod caused by bending and torsion, thereby greatly protecting the structural accuracy and service life of the mold clamping drive mechanism 10 and the drive rod, and ensuring the stable and reliable operation of the equipment under long-term high-frequency mold clamping conditions.

[0041] Secondly, the present invention symmetrically arranges two sets of locking parts 12 on the left and right sides of the fixed mold 8. The hook parts 121 of the two sets of locking parts 12 simultaneously form a symmetrical pressing locking constraint on the back side of the movable mold 9. When the mold is filled with liquid and pressurized, the movable mold 9 is subjected to a uniform outward pushing force of the melt. The symmetrically arranged double-point locking structure can provide reverse locking clamping force synchronously and evenly from the left and right sides, so that the overall locking stress distribution of the mold is uniform, avoiding mold bias, warping, gap displacement and uneven force caused by unilateral locking. This effectively ensures the fitting accuracy of the mold surface and prevents the aluminum alloy melt from having forming defects such as edge running, flash, and overflow. This significantly improves the forming quality and appearance flatness of the heating plate, and further improves the overall locking rigidity and locking stability of the mold.

[0042] In this embodiment, the mold-locking drive mechanism 10 can be an existing dual-output motor or dual-output cylinder.

[0043] See Figures 1-5 The demolding mechanism includes a demolding disc 14 disposed on the back side of the movable mold 9, ejector pins 15 disposed on the demolding disc 14, and a demolding drive mechanism 13 for driving the demolding disc 14 to move linearly. The ejector pins 15 are in multiple sets, arranged at equal angles along the circumference of the demolding disc 14. The movable mold 9 is provided with clearance holes for avoiding the ejector pins 15. The clearance holes communicate with the mold cavity of the movable mold 9. When the mold opening and closing mechanism drives the movable mold 9 to open, the demolding drive mechanism 13 drives the demolding disc 14 to move, and the multiple sets of ejector pins 15 on the demolding disc 14 extend into the mold cavity of the movable mold 9, ejecting the cooled and formed heating plate from the mold cavity for demolding.

[0044] In this embodiment, the demolding drive mechanism 13 can be a linear motor or a hydraulic cylinder.

[0045] See Figures 1-5 The rotary drive device includes a rotary motor 2 and a transmission box 4. The rotary motor 2 is mounted on the frame 1, and its output shaft is connected to the input shaft of the transmission box 4 via a belt drive mechanism 3. The output shaft of the transmission box 4 is connected to the turntable 6. The power of the rotary motor 2 is transmitted to the turntable 6 through the transmission box 4, thereby driving the turntable 6 and multiple sets of processing devices 7 mounted on the turntable 6 to rotate. This allows the multiple sets of processing devices 7 to be sequentially transported to their corresponding processing stations, thus achieving continuous production of the heating plate.

[0046] See Figures 1-5 The mold opening and closing mechanism includes a driving component 18 and a mold opening and closing driving mechanism 17. The upper end of the driving component 18 is fixed to the back side of the movable mold 9, and the lower end of the driving component 18 is hinged to the driving end of the mold opening and closing driving mechanism 17. The mold opening and closing driving mechanism 17 is mounted on a mounting frame, and the mounting frame is hinged to the bracket 16.

[0047] In this embodiment, the mold opening and closing drive mechanism 17 can be a cylinder, a hydraulic cylinder or a linear motor; since the mounting bracket can swing relative to the frame 1, it can adapt to the swing stroke of the movable mold 9; the output power of the mold opening and closing drive mechanism 17 drives the drive component 18 to move, thereby driving the movable mold 9 to rotate around its hinge point, so as to realize the mold opening and closing action.

[0048] See Figures 1-5 The gravity casting method for the heating plate of the present invention includes the following steps:

[0049] S1. The mold opening and closing mechanism drives the movable mold 9 to rotate, so that the movable mold 9 cooperates with the fixed mold 8, and locks the mold through the mold locking mechanism;

[0050] S2. The rotary drive device drives the turntable 6 to rotate, and transfers the mold with the mold locking completed to the casting station. The casting device 5 injects molten aluminum alloy liquid into the forming cavity of the mold in a quantitative manner.

[0051] S3. The rotary drive device drives the turntable 6 to continue rotating, transferring the mold that has been cast to the unloading station; the mold locking mechanism releases the lock, the mold opening and closing mechanism drives the movable mold 9 to open the mold, and the demolding mechanism ejects the heating plate formed in the molding cavity and demolds it; while the turntable 6 is rotating, another mold that has been locked is transferred to the casting station for casting, thereby realizing the continuous production of the heating plate.

[0052] Example 2

[0053] See Figures 6-7 The difference between this embodiment and embodiment 1 is that: the back side of the movable mold 9 is provided with an inclined part 901 corresponding to the hook part 121 of the locking member 12. When the mold is closed, the hook part 121 presses against the surface of the inclined part 901; the extension line of the normal at the center of the contact surface between the inclined part 901 and the hook part 121 passes through the axis of the hinge point between the locking member 12 and the mounting base 11.

[0054] During the casting process, the expansion pressure generated by the molten aluminum alloy in the forming cavity of the mold acts in the opposite direction on the movable mold 9. This force is converted into a normal resisting force perpendicular to the contact surface through the inclined part 901 on the back side of the movable mold 9. The line of action of this normal resisting force passes through the axis of the hinge point between the locking member 12 and the mounting base 11, so that the rotational torque of the normal resisting force about the hinge point is always zero. Therefore, no loosening torque is generated that drives the locking member 12 to flip outward around the hinge point. With the above structure, the mold locking constraint is composed of the fulcrum constraint of the hinge point and the inclined surface resisting constraint of the hook part 121. Thus, the mold locking load can be directly borne by the mechanical structure. The mold locking drive mechanism 10 does not need to continuously output the holding pressure to stably maintain the mold closing and locking state. This effectively reduces the long-term holding pressure energy consumption and reciprocating fatigue wear of the drive element (i.e., the mold locking drive mechanism 10), and greatly improves the mold locking stability and equipment durability under high temperature casting and molten high pressure impact conditions.

[0055] The remaining structures can be implemented with reference to Example 1.

[0056] Example 3

[0057] See Figures 8-13 The difference between this embodiment and embodiment 2 is that a connecting member 19 is provided between the driving end of the mold opening and closing driving mechanism 17 and the driving member 18. One end of the connecting member 19 is installed on the driving end of the mold opening and closing driving mechanism 17, and the other end is connected to the lower end of the driving member 18 through a rotating structure. The rotating structure includes a rotating shaft 20 provided on the connecting member 19 and an elongated hole 182 provided at the lower end of the driving member 18. The rotating shaft 20 passes through the elongated hole 182, and the outer diameter of the rotating shaft 20 is not greater than the width of the elongated hole 182, so that the rotating shaft 20 can slide within the elongated hole 182.

[0058] See Figures 8-13The mold opening and closing mechanism further includes a self-locking structure, which includes a self-locking component 22 and an elastic component 21. The self-locking component 22 is disposed below the driving component 18 and is rotatably connected to the bracket 16 via a rotating shaft. The self-locking component 22 includes a rotating part, a self-locking part 222, and an elastic support part 223, wherein the rotating part is mounted on the rotating shaft. The elastic component 21 is mounted in the bracket 16 at a position corresponding to the elastic support part 223 of the self-locking component 22, and the elastic force of the elastic component 21 drives the self-locking part 222 to rotate upward. A notch 181 is provided at the lower end of the driving component 18. When the mold is closed, the self-locking part 222 abuts against the notch 181 of the driving component 18, and the extension line of the normal at the center of the contact surface between the self-locking part 222 and the notch 181 of the driving component 18 passes through the axis of the rotating part.

[0059] See Figures 8-13 The mold opening and closing mechanism further includes an unlocking structure, which includes an unlocking member 23 disposed on the connecting member 19. The unlocking member 23 is located in the connecting member 19 at a position away from the driving member 18, and the unlocking member 23 abuts against the upper surface of the self-locking member 22. The upper surface of the self-locking member 22 is provided with a stepped surface, which divides the upper surface of the self-locking member 22 into a first upper contact surface 221 and a second upper contact surface 224. When the unlocking member 23 moves from the first upper contact surface 221 to the second upper contact surface 224, the self-locking member 22 enters and abuts against the notch 181 of the driving member 18 under the elastic force of the elastic member 21.

[0060] With the above settings, during the process of the mold opening and closing drive mechanism 17 driving the drive component 18 to move and driving the movable mold 9 to complete the mold closing action, under the action of the elastic component 21, the unlocking component 23 always slides against the first upper contact surface 221. At this time, the unlocking component 23 forms a downward pressure constraint on the self-locking component 22, restricting the self-locking component 22 from flipping upward, so that the self-locking part 222 cannot be stuck into the notch 181 of the drive component 18, ensuring that the mold closing action is not interfered with by the self-locking structure, thereby ensuring that the mold closes smoothly. When the mold is closed in place, the unlocking component 23 slides from the first upper contact surface 221 to the second upper contact surface 224 along with the connecting component 19; since the height of the first upper contact surface 221 is greater than the height of the second upper contact surface 224, the downward pressure limiting effect of the unlocking component 23 on the self-locking component 22 is released, and the self-locking component 22 rotates upward around the rotation axis under the elastic support of the elastic component 21, so that the self-locking part 222 of the self-locking component 22 is stuck into the notch 181 of the drive component 18. At this time, a contact area is formed between the self-locking part 222 and the notch 181 of the driving member 18. The extension line of the normal at the center of the contact area passes through the axis of the rotating part of the self-locking part 22, so that the contact clamping force between the self-locking part 222 and the notch 181 of the driving member 18 has zero rotational torque on the rotating shaft. Therefore, there will be no tendency to flip the self-locking part 22 to loosen. Its force constraint principle is consistent with the zero torque locking principle of the hook part 121 and the inclined part 901 in Embodiment 2. Passive locking is achieved by relying on mechanical geometry. The locking state can be stably maintained without the mold opening and closing mechanism and the elastic member 21 continuously providing a large pre-tightening force, thereby effectively improving the locking reliability and vibration resistance after mold closing.

[0061] When mold opening and unlocking are required, the mold opening and closing drive mechanism 17 retracts in the reverse direction, driving the connecting piece 19 to retract. The rotating shaft 20 on the connecting piece 19 slides relative to the elongated hole 182 along the length direction of the elongated hole 182. During this process, the unlocking piece 23 slides in the reverse direction with the connecting piece 19, climbing from the second upper contact surface 224 back to the first upper contact surface 221. With the help of the height difference between the two contact surfaces, the unlocking piece 23 applies a downward pressing force to the self-locking piece 22, forcing the self-locking piece 22 to overcome the elastic force of the elastic member 21 and swing downward around the rotating axis, so that the self-locking part 222 disengages from the notch 181 of the drive piece 18, completing the unlocking and release. After the self-locking constraint is released, the mold opening and closing drive mechanism 17 can continue to drive the drive piece 18 to move, driving the movable mold 9 to smoothly flip and open the mold.

[0062] The remaining structures can be implemented with reference to Example 2.

[0063] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A gravity casting device for a heating plate, characterized in that, It includes a frame, a turntable mounted on the frame, multiple processing devices mounted on the turntable, a rotary drive device for driving the turntable to rotate, and a casting device; Multiple processing devices are arranged along the circumference of the turntable. Each processing device includes a support, a mold mounted on the support, a mold locking mechanism, a mold opening and closing mechanism, and a demolding mechanism. The support is mounted on the turntable. The mold includes a fixed mold and a movable mold. The movable mold is hinged to the support. The mold opening and closing mechanism is driven by the movable mold and drives the movable mold to open and close relative to the fixed mold. After the mold is closed, the mold locking mechanism locks the fixed mold and the movable mold together. The casting device is located at the casting station outside the turntable. When the processing device rotates with the turntable to the casting station, the casting device injects molten aluminum alloy into the mold cavity formed after the mold is closed. When the processing device reaches the unloading station after casting, the mold locking mechanism releases the lock on the fixed mold and the movable mold. The mold opening and closing mechanism drives the movable mold to open, and the demolding mechanism automatically ejects the heating plate formed in the mold cavity.

2. The gravity casting equipment for the heating plate according to claim 1, characterized in that, The mold-locking mechanism includes two locking members and a mold-locking drive mechanism. The mold-locking drive mechanism is suspended in the air and has synchronously extendable drive rods on both sides. Each drive rod is hinged to one end of one of the locking members. Mounting seats are provided on both sides of the fixed mold. Each locking member is hinged to the mounting seat on the corresponding side, and the hinge point is located between the two ends of the locking member. The other end of the locking member is provided with a hook. When the mold is closed, the hooks in both sets of locking members abut against the back side of the movable mold. The two locking members and the two drive rods are arranged symmetrically.

3. The gravity casting equipment for the heating plate according to claim 2, characterized in that, The back side of the movable mold is provided with an inclined portion at a position corresponding to the hook portion of the locking member; when the mold is closed, the hook portion presses against the surface of the inclined portion; the extension line of the normal at the center of the contact surface between the inclined portion and the hook portion passes through the axis of the hinge point between the locking member and the mounting base.

4. The gravity casting equipment for the heating plate according to claim 1, characterized in that, The demolding mechanism includes a demolding disc disposed on the back side of the movable mold, ejector pins disposed on the demolding disc, and a demolding drive mechanism for driving the demolding disc to perform linear motion, wherein there are multiple sets of ejector pins; the movable mold is provided with a clearance hole for avoiding the ejector pins; the clearance hole is connected to the mold cavity of the movable mold.

5. The gravity casting equipment for the heating plate according to claim 1, characterized in that, The rotary drive device includes a rotary motor and a transmission box. The rotary motor is mounted on the frame, and its output shaft is connected to the input shaft of the transmission box via a belt drive mechanism. The output shaft of the transmission box is connected to the turntable.

6. The gravity casting equipment for the heating plate according to claim 1, characterized in that, The mold opening and closing mechanism includes a driving component and a mold opening and closing driving mechanism. The upper end of the driving component is fixed to the back side of the movable mold, and the lower end is hinged to the driving end of the mold opening and closing driving mechanism. The mold opening and closing driving mechanism is mounted on a mounting frame, and the mounting frame is hinged to the bracket.

7. The gravity casting equipment for the heating plate according to claim 6, characterized in that, A connecting member is provided between the driving end of the mold opening and closing driving mechanism and the driving component. One end of the connecting member is installed on the driving end of the mold opening and closing driving mechanism, and the other end is connected to the lower end of the driving component through a rotating structure. The rotating structure includes a rotating shaft provided on the connecting member and an elongated hole provided at the lower end of the driving component. The rotating shaft passes through the elongated hole, and the outer diameter of the rotating shaft is not greater than the width of the elongated hole.

8. The gravity casting equipment for the heating plate according to claim 7, characterized in that, The mold opening and closing mechanism also includes a self-locking structure, which includes a self-locking component and an elastic component. The self-locking component is located below the driving component and is rotatably connected to the bracket via a rotating shaft. The self-locking component includes a rotating part, a self-locking part, and an elastic support part, wherein the rotating part is mounted on the rotating shaft. The elastic component is installed in the bracket at a position corresponding to the elastic support part of the self-locking component, and the elastic force of the elastic component causes the self-locking part to rotate upward. A notch is provided at the lower end of the driving component. When the mold is closed, the self-locking part abuts against the notch of the driving component, and the extension line of the normal at the center of the contact surface between the self-locking part and the notch of the driving component passes through the axis of the rotating part.

9. The gravity casting equipment for the heating plate according to claim 8, characterized in that, The mold opening and closing mechanism further includes an unlocking structure, which includes an unlocking member disposed on the connector. The unlocking member is located in the connector away from the driving member and presses against the upper surface of the self-locking member. The upper surface of the self-locking member is provided with a stepped surface, which divides the upper surface of the self-locking member into a first upper contact surface and a second upper contact surface. When the unlocking member moves from the first upper contact surface to the second upper contact surface, the self-locking member enters and presses against the notch of the driving member under the elastic force of the elastic member.

10. A method for gravity casting of a heating plate in the gravity casting apparatus for heating plates according to any one of claims 1-9, characterized in that, Includes the following steps: S1. The mold opening and closing mechanism drives the movable mold to rotate, so that the movable mold cooperates with the fixed mold; after the mold is closed, the mold locking mechanism locks the mold. S2. The rotary drive device drives the turntable to rotate, and moves the mold with the mold locking completed to the casting station. After the turntable stops and is in place, the casting device injects molten aluminum alloy liquid into the forming cavity of the mold in a metered manner. S3. The rotary drive device drives the turntable to continue rotating, transferring the mold that has been cast to the unloading station; the mold locking mechanism releases the lock, the mold opening and closing mechanism drives the movable mold to open, and the demolding mechanism ejects the heating plate formed in the molding cavity and demolds it; at the same time, during the rotation of the turntable, another mold that has been locked is transferred to the casting station, and after the turntable stops and is in place, the casting operation is performed.

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