A low-pressure casting automobile wheel hub mold spraying device

Abstract

The present invention relates to the technical field of wheel hub casting equipment, and specifically to a low-pressure casting automobile wheel hub mold spraying device, which comprises a machine body, a clamping mechanism, a liquid storage tank, a pump and air machine, a support frame, a power cylinder, a baffle, a support plate and a spraying unit, wherein the liquid storage tank and the pump and air machine are fixed on the machine body, the support frame is located between the two and is equipped with a power cylinder, the support plate is fixed below the clamping mechanism, baffles are provided on both sides, and a plurality of filter holes are provided on the support plate, the spraying unit comprises a transfer square box, a liquid storage tank, a transfer circular box, a rotating disk, a nozzle, a switching mechanism and a rotating mechanism, the liquid storage tank is at the bottom of the support plate, the transfer square box is connected to the output shaft of the power cylinder, and a liquid supply hose and an air supply hose connected to the liquid storage tank and the pump and air machine are provided on the top, and the transfer circular box is connected to the bottom, and multiple nozzles are provided on the rotating disks on both sides of the transfer circular box, the blocking output end of the switching mechanism can cut off the connection, the rotating output end of the rotating mechanism can drive the rotating disk to rotate, and the rotating disk is transmission-connected to the blocking output end.

Description

Technical Field

[0001] The present invention relates to the technical field of hub casting equipment, and particularly to a spraying device for a low-pressure casting automobile hub mold. Background Art

[0002] As an advanced casting process, the principle of low-pressure casting is to introduce dry compressed air or inert gas into a sealed crucible. Under the pressure generated by these gases, the molten metal rises from bottom to top along the riser tube, smoothly fills the mold cavity through the gate, and then solidifies in a continuous pressure environment to obtain the casting. The low-pressure casting automobile hub mold is designed and manufactured based on this principle. It provides a specific cavity for the forming of automobile hubs, guides the molten metal to flow according to the pre-designed shape and size, and finally forms automobile hubs that meet the requirements.

[0003] In the production process of automobile hubs, spraying a release agent on the hub mold is a key process. The release agent can effectively prevent the adhesion between the hub blank and the mold after die casting, which is crucial for ensuring the production quality of the hubs. However, in traditional production operations, the release agent is usually sprayed manually. This method has many disadvantages: on the one hand, it is difficult for manual operation to ensure uniform coverage of the release agent on the mold, which affects the full play of the release agent and may lead to poor demolding of the hub, reducing the product quality; on the other hand, the release agent is prone to splashing during the spraying process, posing a potential threat to the physical health of the staff. In addition, the traditional mold spraying operation does not recycle the release agent, which not only causes a large amount of waste of the release agent but also increases the production cost, not conforming to the concept of green production and resource conservation.

[0004] In summary, it is extremely urgent to design a new type of hub mold spraying device that can achieve uniform spraying, ensure the safety of the staff, and at the same time have the function of recycling the release agent. This has important practical significance for improving the production quality and efficiency of automobile hubs and reducing the production cost. Summary of the Invention

[0005] Based on this, it is necessary to provide a spraying device for a low-pressure casting automobile hub mold in view of the problems of the existing technology.

[0006] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a low-pressure casting automobile wheel hub mold spraying device, including a machine body and a clamping mechanism, the clamping mechanism is used to realize the opening and closing action of the male mold and the female mold, and also includes a liquid storage tank, a pump air machine, a support frame, a power cylinder, a baffle, a support plate and a spraying unit, the liquid storage tank and the pump air machine are fixedly arranged on the machine body, the support frame is fixedly arranged between the liquid storage tank and the pump air machine, the power cylinder is fixedly arranged on the support frame, the support plate is located below the clamping mechanism and is fixedly connected to the machine body, two baffles are fixedly arranged on both sides of the support plate, and a number of filter holes are evenly spaced on the support plate, the spraying unit includes a transfer square box, a liquid storage tank, a transfer round box, a rotating disk, a nozzle, a switching machine Structure and rotating mechanism, the liquid storage tank is fixedly arranged at the bottom of the support plate, the adapter box is fixedly connected to the output shaft of the power cylinder, and the adapter box is sequentially provided with a liquid delivery hose and an air delivery hose, the liquid delivery hose is connected to the liquid storage tank, and the air delivery hose is connected to the pump air machine, the transfer round box is fixedly arranged below the adapter box and is connected to the inside thereof, and rotating disks are coaxially rotated on both sides of the transfer round box, and a number of nozzles are arranged in a matrix on the rotating disk, the switching mechanism includes a blocking output end arranged in the adapter box, and the rotating mechanism includes a rotating output end, the blocking output end is used to cut off the connection between the liquid delivery hose and the air delivery hose and the transfer round box, the rotating output end is used to drive the rotating disk to rotate, and the rotating disk is transmission-connected to the blocking output end.

[0007] Furthermore, the rotating mechanism also includes a gearbox, a drive motor, a power gear and a power ring gear. The gearbox is fixedly arranged below the transfer box, the drive motor is fixedly arranged at the bottom of the gearbox, the gearbox has two output shafts, and there are two power gears. A power gear is coaxially fixed on the output shaft of each gearbox, and there are two power ring gears. A power ring gear is coaxially fixed on each rotating disk, and the power gears and the power ring gears correspond to each other one by one and mesh with each other.

[0008] Furthermore, the power ring gear is the rotation output end of the rotation mechanism.

[0009] Furthermore, the switching mechanism also includes a liquid inlet transfer pipe, an air inlet transfer pipe, a blocking rod, a touch rod and a limit sleeve. A movable hole is provided in the transfer box, the blocking rod is elastically slidably arranged in the movable hole, and plugs are formed at both ends of the blocking rod. The diameter of the plug is the same as the diameter of the movable hole, the diameter of the blocking rod is smaller than the plug, and the plug is dynamically sealed with the inner wall of the movable hole. A limiting sleeve is coaxially fixed to the end of the transfer box, a spring is provided between the plug away from the limiting sleeve and the transfer box, and a touch rod is coaxially fixed on the plug close to the limiting sleeve. The blocking rod is connected to the rotating disk through the touch rod. The liquid inlet transfer pipe and the air inlet transfer pipe are sequentially arranged on the transfer box. The diameters of the liquid inlet transfer pipe and the air inlet transfer pipe are the same. The liquid supply hose is connected to the inside of the transfer box through the liquid inlet transfer pipe, and the air supply hose is connected to the inside of the transfer box through the air inlet transfer pipe. The width of the plug is greater than the diameters of the liquid inlet transfer pipe and the air inlet transfer pipe.

[0010] Furthermore, the blocking rod is the blocking output end of the switching mechanism.

[0011] Furthermore, the rotating mechanism also includes a connecting support plate fixedly arranged on the transfer round box, a sliding support plate slidably arranged on the connecting support plate, a touch rack and a touch plate fixedly arranged on the sliding support plate, a contact round block fixedly arranged on the top of the touch plate, buffer teeth elastically arranged at both ends of the touch rack, a contact bevel block fixedly arranged on the end of the touch rod away from the blocking rod, a supporting support plate fixedly arranged on the top of the transfer square box and an elastic locking sleeve arranged at the end of the supporting support plate, and the touch rack is engaged with one of the power gear rings.

[0012] Furthermore, two limiting grooves are symmetrically provided on the trigger rod, and two limiting strips are symmetrically formed on the inner wall of the limiting sleeve. The limiting strips correspond to the limiting grooves one by one and are slidably connected.

[0013] Furthermore, a positioning groove is provided on the connecting support plate, and a positioning protrusion is formed on the sliding support plate, and the positioning protrusion is slidably matched with the positioning groove.

[0014] Furthermore, the spraying unit also includes a first valve, a first gear, a second valve, a second gear, a wedge bar, a sliding support plate, a first tooth plate and a second tooth plate. The first valve is arranged on the liquid inlet transfer pipe, and the second valve is arranged on the air inlet transfer pipe. The first gear is coaxially fixed to the control shaft of the first valve, and the second gear is coaxially fixed to the control shaft of the second valve. The wedge bar is fixedly arranged on one side of the transfer box, the sliding support plate is slidably arranged on the wedge bar, and the end of the sliding support plate close to the trigger rod is fixed to the trigger rod. The first tooth plate and the second tooth plate are fixedly arranged on the sliding support plate in sequence. The first tooth plate is used to engage the first gear, and the second tooth plate is used to engage the second gear.

[0015] Furthermore, the spraying unit also includes a slag discharge port opened on the support plate, a slag storage box arranged below the slag discharge port and fixedly connected to the support plate, a sealing buckle plate elastically slidably buckled on the slag discharge port, a toggle rod fixedly arranged on the sealing buckle plate, a slag pusher scraper fixedly arranged on the mold clamping mechanism, and a top rod fixedly arranged on the slag pusher scraper.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] First, the device's unique mechanical structure enables timely and precise switching between air and liquid spraying. The forward and reverse rotation of the rotating disk drives the movement of related components, ensuring that after the air blows away impurities, it quickly switches to spraying the release liquid. This smooth process improves the efficiency and quality of mold processing.

[0018] Second: A recycling structure is provided. During the spraying process, the excess release agent falls into the liquid storage tank through the filter holes and can be reused later. This effectively reduces the waste of the release agent, lowers the cost, and embodies the concept of energy conservation and environmental protection.

[0019] Third: The filter holes of the pallet can block impurities. The die-closing mechanism cooperates with the slag-pushing scraper and the slag-discharging port to separate the impurities from the release agent. This ensures the purity of the release agent, is beneficial to improving the demoulding effect, and facilitates the centralized treatment of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the embodiment;

[0021] Figure 2 is a three-dimensional structural schematic diagram of the embodiment with one baffle removed; Figure 1 ;

[0022] Figure 3 is a three-dimensional structural schematic diagram of the embodiment with one baffle removed; Figure 2 ;

[0023] Figure 4 is a cross-sectional view of the pallet of the embodiment;

[0024] Figure 5 is a three-dimensional structural schematic diagram of the embodiment when the slag-discharging port is opened;

[0025] Figure 6 is a three-dimensional structural schematic diagram of the spraying unit of the embodiment;

[0026] Figure 7 is a three-dimensional structural schematic diagram of the transfer round box of the embodiment; Figure 1 ;

[0027] Figure 8 is a three-dimensional structural schematic diagram of the transfer round box of the embodiment; Figure 2 ;

[0028] Figure 9 is a cross-sectional view of the transfer square box of the embodiment; Figure 1 ;

[0029] Figure 10 is a cross-sectional view of the transfer square box of the embodiment; Figure 2 ;

[0030] Figure 11 is a three-dimensional structural exploded schematic diagram of the transfer square box of the embodiment;

[0031] Figure 12 is a three-dimensional structural exploded schematic diagram of the sliding support plate of the embodiment.

[0032] The numbers in the figure are: 1, machine body; 2, mold clamping mechanism; 3, slag pusher; 4, ejector rod; 5, liquid storage tank; 6, liquid feeding hose; 7, air pump; 8, air feeding hose; 9, support frame; 10, power cylinder; 11, baffle; 12, support plate; 13, filter hole; 14, slag discharge port; 15, blocking plate; 16, toggle rod; 17, slag storage tank; 18, liquid storage tank; 19, transfer box; 20, liquid inlet transfer pipe; 21, first valve; 22, first gear; 23, air inlet transfer pipe; 24, second valve; 25, second gear; 26, transfer box; 27, rotating disk; 28 , nozzle; 29, power gear ring; 30, gear box; 31, power gear; 32, drive motor; 33, blocking rod; 34, plug; 35, touch rod; 36, limit groove; 37, touch bevel block; 38, limit sleeve; 39, limit strip; 40, supporting plate; 41, elastic locking sleeve; 42, wedge strip; 43, sliding support plate; 44, first tooth plate; 45, second tooth plate; 46, movable hole; 47, connecting support plate; 48, positioning groove; 49, sliding support plate; 50, touch rack; 51, buffer tooth; 52, positioning protrusion; 53, touch plate; 54, contact round block. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] refer to Figures 1 to 12 :

[0035] A low-pressure casting automobile wheel hub mold spraying device includes a body 1 and a clamping mechanism 2, the clamping mechanism 2 is used to realize the opening and closing action of the male mold and the female mold, and also includes a liquid storage tank 5, a pump air machine 7, a support frame 9, a power cylinder 10, a baffle 11, a support plate 12 and a spraying unit. The liquid storage tank 5 and the pump air machine 7 are fixedly arranged on the body 1, the support frame 9 is fixedly arranged between the liquid storage tank 5 and the pump air machine 7, the power cylinder 10 is fixedly arranged on the support frame 9, the support plate 12 is located below the clamping mechanism 2 and is fixedly connected to the body 1, two baffles 11 are fixedly arranged on both sides of the support plate 12, and the support plate 12 is evenly spaced. A plurality of filter holes 13 are provided, and the spraying unit includes a transfer box 19, a liquid storage tank 18, a transfer round box 26, a rotating disk 27, a nozzle 28, a switching mechanism and a rotating mechanism. The liquid storage tank 18 is fixedly arranged at the bottom of the support plate 12, and the transfer box 19 is fixedly connected to the output shaft of the power cylinder 10. A liquid feeding hose 6 and an air feeding hose 8 are sequentially provided on the transfer box 19. The liquid feeding hose 6 is connected to the liquid storage tank 5, and the air feeding hose 8 is connected to the air pump 7. The transfer round box 26 is fixedly provided below the transfer box 19 and is connected to the inside thereof. A rotating disk 27 (such as Figure 7As shown), a plurality of nozzles 28 are arranged in a matrix on the rotating disk 27, the switching mechanism includes a blocking output end arranged in the transfer box 19, and the rotating mechanism includes a rotating output end. The blocking output end is used to cut off the connection between the liquid supply hose 6 and the air supply hose 8 and the transfer box 26, and the rotating output end is used to drive the rotating disk 27 to rotate. The rotating disk 27 is transmission-connected to the blocking output end.

[0036] It should be noted that when the device is in the initial state, under the action of the blocked output end, the air supply hose 8 is connected to the inside of the transfer round box 26. When the device is in operation, the mold clamping mechanism 2 drives the male mold and the female mold to open, and then the power cylinder 10 drives the transfer box 19 and the transfer round box 26 to descend between the opened male mold and the female mold, and then the rotating output end drives the two rotating disks 27 to start rotating in the forward direction, and at the same time the air pump 7 starts pumping air, and the gas passes through the air supply hose 8 and the transfer box 19 and finally enters the transfer round box 26, and then is ejected through the nozzle 28. The rotating rotating disk 27 can use the gas ejected from the nozzle 28 to blow off the residual impurities on the male mold and the female mold to ensure that the surface of the male mold and the female mold remains clean. Afterwards, The rotating output end drives the two rotating disks 27 to start rotating in the opposite direction. At this time, the reverse rotation of the rotating disk 27 drives the blocking output end to move, thereby cutting off the connection between the air supply hose 8 and the transfer circular box 26, and making the liquid supply hose 6 and the transfer circular box 26 connected. At this time, the demoulding liquid in the liquid storage tank 5 is sent into the transfer square box 19 through the liquid inlet transfer pipe 20, and then passes through the transfer circular box 26 and is finally sprayed out from the nozzle 28, and cooperates with the reverse rotating rotating disk 27 to evenly spray the demoulding agent onto the male and female molds. During the spraying process, excess demoulding agent will fall onto the support plate 12 and fall into the liquid storage tank 18 through the filter hole 13, which is convenient for subsequent use to avoid waste, and the two baffles 11 can also prevent liquid splashing during the spraying process.

[0037] In order to show the detailed structure of the rotating mechanism, the following features are also set:

[0038] The rotating mechanism also includes a gearbox 30, a drive motor 32, a power gear 31 and a power ring gear 29. The gearbox 30 is fixedly arranged below the transfer box 26, and the drive motor 32 is fixedly arranged at the bottom of the gearbox 30. The gearbox 30 has two output shafts and two power gears 31. A power gear 31 is coaxially fixed on the output shaft of each gearbox 30. There are two power ring gears 29. A power ring gear 29 is coaxially fixed on each rotating disk 27. The power gear 31 corresponds to the power ring gear 29 one by one and meshes with each other.

[0039] The power ring gear 29 is the rotation output end of the rotating mechanism.

[0040] When the equipment is running, the drive motor 32 drives the gear box 30 to operate, and the operation of the gear box 30 drives the two power gears 31 to rotate. The rotation of the power gear 31 drives the power ring gear 29 to rotate, and the rotation of the power ring gear 29 drives the rotating disk 27 to rotate.

[0041] In order to show the detailed structure of the switching mechanism, the following features are also set:

[0042] The switching mechanism also includes a liquid transfer pipe 20, an air transfer pipe 23, a blocking rod 33, a trigger rod 35 and a limit sleeve 38. A movable hole 46 (such as Figure 9 As shown in the figure, the blocking rod 33 is elastically slidably arranged in the movable hole 46, and plugs 34 are formed at both ends of the blocking rod 33. The diameter of the plug 34 is the same as the diameter of the movable hole 46, and the diameter of the blocking rod 33 is smaller than the plug 34. The plug 34 is dynamically sealed with the inner wall of the movable hole 46. A limit sleeve 38 is coaxially fixedly provided at the end of the transfer box 19. A spring is provided between the plug 34 away from the limit sleeve 38 and the transfer box 19. A contact is coaxially fixedly provided on the plug 34 close to the limit sleeve 38. The movable rod 35 and the sealing rod 33 are connected to the rotating disk 27 through the trigger rod 35. The liquid inlet transfer tube 20 and the air inlet transfer tube 23 are arranged in sequence on the transfer box 19. The diameters of the liquid inlet transfer tube 20 and the air inlet transfer tube 23 are the same. The liquid supply hose 6 is connected to the inside of the transfer box 19 through the liquid inlet transfer tube 20. The air supply hose 8 is connected to the inside of the transfer box 19 through the air inlet transfer tube 23. The width of the plug 34 is greater than the diameters of the liquid inlet transfer tube 20 and the air inlet transfer tube 23.

[0043] The blocking rod 33 is the blocking output end of the switching mechanism.

[0044] It should be noted that, in the initial state, under the action of the spring, the plug 34 blocks the liquid inlet transfer pipe 20, and the plug 34 away from the spring is in contact with the limit sleeve 38. Therefore, when the rotating disk 27 rotates forward, only gas will be ejected through the nozzle 28. When the rotating disk 27 rotates reversely, the reverse rotation of the rotating disk 27 will drive the trigger rod 35 to move, and the trigger rod 35 drives the blocking rod 33 to move in the movable hole 46, thereby causing the plug 34 to move, and finally a plug 34 blocks the air inlet transfer pipe 23. At this point, the demoulding liquid in the liquid storage tank 5 can smoothly pass through the transfer square box 19 into the transfer round box 26, and then be ejected by the nozzle 28.

[0045] In order to show the connection relationship between the blocking rod 33 and the rotating disk 27, the following features are specifically provided:

[0046] The rotating mechanism also includes a connecting support plate 47 fixedly provided on the transfer box 26, a sliding support plate 49 slidably provided on the connecting support plate 47, a trigger rack 50 and a trigger plate 53 fixedly provided on the sliding support plate 49, a resisting round block 54 fixedly provided on the top of the trigger plate 53, and buffer teeth 51 elastically provided at both ends of the trigger rack 50 (such as Figure 12 As shown), a contact bevel 37 fixedly provided on the end of the trigger rod 35 away from the blocking rod 33, a supporting plate 40 fixedly provided on the top of the adapter box 19 and an elastic locking sleeve 41 provided on the end of the supporting plate 40, the trigger rack 50 is engaged with one of the power gear rings 29.

[0047] When the device is running, the rotating disk 27 rotates in the opposite direction so that the power gear ring 29 drives the touch rack 50 to move, and the movement of the touch rack 50 drives the sliding support plate 49 to slide on the connecting support plate 47, causing the touch plate 53 and the resistance round block 54 to gradually approach the supporting support plate 40. During the rising process of the resistance round block 54, the resistance round block 54 contacts the contact inclined block 37, causing the trigger rod 35 to move. The movement of the trigger rod 35 drives the blocking rod 33 to move, thereby causing the plug 34 to open the liquid inlet transfer pipe 20 and close the air inlet transfer pipe 23. Finally, the resistance round block 54 is stuck in the elastic locking sleeve 41. At this time, the power The ring gear 29 will only engage with the buffer teeth 51, and the trigger rack 50 will no longer move, ensuring that the equipment can normally perform the work of spraying the demoulding liquid; in addition, when the rotating disk 27 rotates forward, the power ring gear 29 will engage with the buffer teeth 51, and then engage with the trigger rack 50, causing the trigger rack 50 to move downward, and then pull the interference circle 54 out of the elastic locking sleeve 41, and then move downward with the trigger rack 50. When the interference circle 54 is separated from the contact bevel block 37, the blocking rod 33 is elastically reset under the action of the spring, so that the plug 34 re-seals the liquid inlet transfer pipe 20 and opens the air inlet transfer pipe 23.

[0048] In order to ensure that the blocking rod 33 does not deflect during movement, thereby affecting the contact between the contacting inclined block 37 and the resisting circular block 54, the following features are specifically provided:

[0049] The trigger rod 35 is provided with two symmetrical limit slots 36 (such as Figure 11 As shown), two limiting strips 39 are symmetrically formed on the inner wall of the limiting sleeve 38, and the limiting strips 39 correspond to the limiting grooves 36 one by one and are slidably connected.

[0050] When the device is running, the cooperation between the limiting strip 39 and the limiting groove 36 ensures that the trigger rod 35 will not deflect during movement, so that the contacting inclined block 37 will not shift, thereby being able to smoothly contact the abutting circular block 54.

[0051] In order to ensure that the sliding support plate 49 does not fall off the connecting support plate 47, the following features are also provided:

[0052] A positioning groove 48 is formed on the connecting support plate 47 , and a positioning protrusion 52 is formed on the sliding support plate 49 . The positioning protrusion 52 is slidably engaged with the positioning groove 48 .

[0053] The setting of the positioning protrusion 52 and the positioning groove 48 can ensure that during the forward rotation of the rotating disk 27, the rotation of the power ring gear 29 will not cause the trigger rack 50 and the sliding support plate 49 to fall off from the connecting support plate 47, but will only cause the positioning protrusion 52 on the sliding support plate 49 to move to the lowest point of the positioning groove 48. At this time, the power ring gear 29 will only engage with the buffer tooth 51, ensuring the normal operation of the equipment.

[0054] In order to ensure a better blocking effect when the blocking rod 33 moves, the following features are specifically provided:

[0055] The spraying unit also includes a first valve 21, a first gear 22, a second valve 24, a second gear 25, a wedge strip 42, a sliding support plate 43, a first tooth plate 44 and a second tooth plate 45. The first valve 21 is arranged on the liquid inlet transfer pipe 20, the second valve 24 is arranged on the air inlet transfer pipe 23, the first gear 22 is coaxially fixedly connected to the control shaft of the first valve 21, the second gear 25 is coaxially fixedly connected to the control shaft of the second valve 24, and the wedge strip 42 is fixedly arranged on one side of the transfer box 19 (as shown in FIG. Figure 11 As shown in the figure, the sliding support plate 43 is slidably set on the wedge bar 42, and the end of the sliding support plate 43 close to the trigger rod 35 is fixedly connected to the trigger rod 35. The first tooth plate 44 and the second tooth plate 45 are fixedly set on the sliding support plate 43 in sequence. The first tooth plate 44 is used to engage the first gear 22, and the second tooth plate 45 is used to engage the second gear 25.

[0056] It should be noted that, in the initial state, the first valve 21 is closed and the second valve 24 is open. When the resistance circle 54 moves against the contact inclined block 37, the trigger rod 35 moves and drives the sliding support plate 43 to move. The movement of the sliding support plate 43 drives the first gear plate 44 and the second gear plate 45 to move, and finally causes the first gear plate 44 and the second gear plate 45 to respectively drive the first gear 22 and the second gear 25 to rotate, thereby closing the second valve 24 and opening the first valve 21.

[0057] In order to prevent die-casting debris from accumulating at the filter hole 13 during operation of the device, the following features are also provided:

[0058] The spraying unit further includes a slag discharge port 14 (such as Figure 5As shown), a slag storage box 17 arranged below the slag discharge port 14 and fixedly connected to the support plate 12, a sealing plate 15 elastically slidably buckled on the slag discharge port 14, a toggle rod 16 fixedly arranged on the sealing plate 15, a slag pushing scraper 3 fixedly arranged on the mold clamping mechanism 2 and a push rod 4 fixedly arranged on the slag pushing scraper 3.

[0059] It should be noted that, in the initial state, the blocking plate 15 blocks the slag discharge port 14. When the demoulding liquid is sprayed, the excess demoulding liquid will fall into the liquid storage box 18 along the filter hole 13, and the impurities are blocked by the filter hole 13. When the mold closing mechanism 2 drives the male mold and the female mold to close together, the mold closing mechanism 2 drives the slag scraper 3 to move, and the movement of the slag scraper 3 will gather the impurities together. When it is almost close to the blocking plate 15, the push rod 4 will contact the toggle rod 16 in advance, thereby pushing open the blocking plate 15. After that, the impurities gathered together will fall into the slag discharge port 14. After the die casting is completed, the mold closing mechanism 2 drives the male mold and the female mold to open, and the push rod 4 is separated from the toggle rod 16. Then the blocking plate 15 will block the slag discharge port 14 again.

[0060] The operating principle of this device is as follows: When the device is in operation, the mold clamping mechanism 2 opens the male and female molds, and the power cylinder 10 lowers the transfer box 19 and the circular transfer box 26 between the two molds. The rotating mechanism's drive motor 32, through the gearbox 30, drives the power gear 31, driving the power ring gear 29, causing the rotating disk 27 to rotate forward. Simultaneously, the air pump 7 pumps air, which is then ejected from the nozzle 28 through the air inlet transfer tube 23, the transfer box 19, and the circular transfer box 26, clearing impurities from the mold. The rotating disk 27 then rotates in the reverse direction, driving the trigger rod 35 to move the blocking rod 33, blocking the air inlet transfer tube 23. Release fluid from the liquid reservoir 5 is ejected from the nozzle 28 through the liquid inlet transfer tube 20, the transfer box 19, and other channels. This, in conjunction with the rotating disk 27, evenly coats the mold. Excess release fluid falls onto the baffle 11 and enters the liquid storage tank 18 through the filter holes 13. The baffle 11 prevents splashing.

[0061] When the rotating disk 27 rotates in the reverse direction, the power ring gear 29 drives the trigger rack 50, causing the sliding support plate 49 to slide. The abutment block 54 contacts the abutment bevel block 37, and the trigger rod 35 drives the blocking rod 33 to open the liquid inlet transfer pipe 20. The abutment block 54 engages the elastic locking sleeve 41. When the rotating disk 27 rotates in the forward direction, the power ring gear 29 first engages the buffer teeth 51, then moves the trigger rack 50 downward, resetting the blocking rod 33. The stop groove 36 of the trigger rod 35 cooperates with the stop bar 39 of the stop sleeve 38 to prevent deflection. The positioning groove 48 of the connecting support plate 47 cooperates with the positioning protrusion 52 of the sliding support plate 49 to prevent it from falling off. The movement of the abutment block 54 drives the sliding support plate 43, causing the first and second toothed plates 44, 45 to control valve switching. During spraying, impurities are blocked by the filter holes 13, and the mold clamping mechanism 2 drives the slag pushing scraper 3 to gather the impurities. The push rod 4 contacts the toggle rod 16 to push open the blocking plate 15, and the impurities fall into the slag discharge port 14. After the die casting is completed, the blocking plate 15 is reset.

[0062] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A spraying device for a low-pressure casting automobile wheel hub mold, comprising a machine body and a mold clamping mechanism, the mold clamping mechanism is used to realize the opening and closing actions of the male mold and the female mold, and is characterized in that It also includes a liquid storage tank, a pump air machine, a support frame, a power cylinder, a baffle, a pallet and a spraying unit. The liquid storage tank and the pump air machine are fixedly arranged on the machine body, the support frame is fixedly arranged between the liquid storage tank and the pump air machine, the power cylinder is fixedly arranged on the support frame, the pallet is located below the clamping mechanism and is fixedly connected to the machine body, two baffles are fixedly arranged on both sides of the pallet, and a number of filter holes are evenly spaced on the pallet. The spraying unit includes a transfer box, a liquid storage tank, a transfer round box, a rotating disk, a nozzle, a switching mechanism and a rotating mechanism. The liquid storage tank is fixedly arranged at the bottom of the pallet, and the transfer box is fixedly connected to the output shaft of the power cylinder. , a liquid feeding hose and an air feeding hose are sequentially provided on the transfer box, the liquid feeding hose is connected to the liquid storage tank, the air feeding hose is connected to the air pump, the transfer round box is fixedly arranged under the transfer box and is connected to the interior thereof, both sides of the transfer round box are coaxially rotatably provided with rotating disks, a plurality of nozzles are arranged in a matrix on the rotating disk, the switching mechanism includes a blocking output end provided in the transfer box, the rotating mechanism includes a rotating output end, the blocking output end is used to cut off the connection between the liquid feeding hose and the air feeding hose and the transfer round box, the rotating output end is used to drive the rotating disk to rotate, and the rotating disk is transmission-connected to the blocking output end; The switching mechanism also includes a liquid inlet transfer pipe, an air inlet transfer pipe, a blocking rod, a trigger rod and a limit sleeve. A movable hole is provided in the transfer square box, and the blocking rod is elastically slidably arranged in the movable hole. Plugs are formed at both ends of the blocking rod, and the diameter of the plug is the same as the diameter of the movable hole. The diameter of the blocking rod is smaller than the plug, and the plug is dynamically sealed with the inner wall of the movable hole. A limiting sleeve is coaxially fixed to the end of the transfer square box, and a spring is provided between the plug away from the limiting sleeve and the transfer square box. A trigger rod is coaxially fixed on the plug close to the limiting sleeve, and the blocking rod is connected to the rotating disk through the trigger rod. The liquid inlet transfer pipe and the air inlet transfer pipe are sequentially arranged on the transfer square box. The diameters of the liquid inlet transfer pipe and the air inlet transfer pipe are the same. The liquid supply hose is connected to the inside of the transfer square box through the liquid inlet transfer pipe, and the air supply hose is connected to the inside of the transfer square box through the air inlet transfer pipe. The width of the plug is greater than the diameters of the liquid inlet transfer pipe and the air inlet transfer pipe, and the blocking rod is the blocking output end of the switching mechanism.

2. The spraying device for a low-pressure casting automobile wheel hub mold according to claim 1, characterized in that, The rotating mechanism also includes a gearbox, a drive motor, a power gear and a power ring gear. The gearbox is fixedly arranged below the transfer box, and the drive motor is fixedly arranged at the bottom of the gearbox. The gearbox has two output shafts and two power gears. A power gear is coaxially fixed on the output shaft of each gearbox. There are two power ring gears, and a power ring gear is coaxially fixed on each rotating disk. The power gears and the power ring gears correspond to each other one by one and mesh with each other.

3. The spraying device for a low-pressure casting automobile wheel hub mold according to claim 2, wherein, The power ring gear is the rotation output end of the rotating mechanism.

4. A low-pressure casting automobile wheel hub mold spraying device according to claim 1, characterized in that, The rotating mechanism also includes a connecting support plate fixedly arranged on the transfer round box, a sliding support plate slidably arranged on the connecting support plate, a touch rack and a touch plate fixedly arranged on the sliding support plate, a contact round block fixedly arranged on the top of the touch plate, buffer teeth elastically arranged at both ends of the touch rack, a contact bevel block fixedly arranged on the end of the touch rod away from the blocking rod, a supporting support plate fixedly arranged on the top of the transfer square box and an elastic locking sleeve arranged at the end of the supporting support plate, and the touch rack is engaged with one of the power gear rings.

5. A low-pressure casting automobile wheel hub mold spraying device according to claim 4, characterized in that, Two limiting grooves are symmetrically provided on the trigger rod, and two limiting strips are symmetrically formed on the inner wall of the limiting sleeve. The limiting strips correspond to the limiting grooves one by one and are slidably connected.

6. The spraying device for a low-pressure casting automobile wheel hub mold according to claim 5, characterized in that, A positioning groove is provided on the connecting support plate, and a positioning convex block is formed on the sliding support plate. The positioning convex block is slidably matched with the positioning groove.

7. A low-pressure casting automotive wheel mold spraying device according to claim 6, characterized in that, The spraying unit also includes a first valve, a first gear, a second valve, a second gear, a wedge bar, a sliding support plate, a first tooth plate and a second tooth plate. The first valve is arranged on the liquid inlet transfer pipe, and the second valve is arranged on the air inlet transfer pipe. The first gear is coaxially fixed to the control shaft of the first valve, and the second gear is coaxially fixed to the control shaft of the second valve. The wedge bar is fixedly arranged on one side of the transfer box, and the sliding support plate is slidably arranged on the wedge bar. The end of the sliding support plate close to the trigger rod is fixed to the trigger rod, and the first tooth plate and the second tooth plate are fixedly arranged on the sliding support plate in sequence. The first tooth plate is used to engage the first gear, and the second tooth plate is used to engage the second gear.

8. A low-pressure casting automobile wheel hub mold spraying device according to claim 1, characterized in that, The spraying unit also includes a slag discharge port opened on the support plate, a slag storage box arranged below the slag discharge port and fixedly connected to the support plate, a sealing plate elastically slidably buckled on the slag discharge port, a toggle rod fixedly arranged on the sealing plate, a slag pusher scraper fixedly arranged on the mold clamping mechanism, and a push rod fixedly arranged on the slag pusher scraper.

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