CN118023494A - Vacuum air extraction structure and method for die casting die - Google Patents
Vacuum air extraction structure and method for die casting die Download PDFInfo
- Publication number
- CN118023494A CN118023494A CN202410036358.3A CN202410036358A CN118023494A CN 118023494 A CN118023494 A CN 118023494A CN 202410036358 A CN202410036358 A CN 202410036358A CN 118023494 A CN118023494 A CN 118023494A
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- die
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- cavity
- sealing
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- 238000004512 die casting Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000000605 extraction Methods 0.000 title abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 230000017525 heat dissipation Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 41
- 238000003860 storage Methods 0.000 claims description 41
- 238000005086 pumping Methods 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2236—Equipment for loosening or ejecting castings from dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of machine tools and discloses a vacuum air extraction structure and a method for a die casting die. During operation, air in the seal box is pumped into the pressurizing box through the vacuum pump, then the controller opens the first electromagnetic valve to enable air to enter the air cavity through the air inlet pipe, the limiting block is jacked upwards to be demolded, in the demolding process, air enters the lower die through the air exhaust hole to blow air to the surface of the workpiece to conduct secondary heat dissipation, demolding and cooling effects are achieved, and workers can directly take the die.
Description
Technical Field
The invention relates to the field of vacuum air extraction of die casting dies, in particular to a vacuum air extraction structure and method for a die casting die.
Background
The die refers to a tool for pressing a model in industrial production. It can also be understood that: the industrial production is used for injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods to obtain various molds and tools of the required products. With the continuous development of the mold industry, the most commonly used vacuum die casting mold is to utilize a vacuum pump to discharge air in a vacuum tank before die casting the mold, so that the vacuum tank is in a vacuum state, and then die casting operation is performed.
CN213288632U discloses a deformation-preventing vacuumizing die casting die, including pouring the mouth, go up mould, bed die and hydraulic cylinder, the intermediate position department at last mould top installs the pouring mouth, one side at last mould top is provided with the evacuation structure, the evacuation structure is including electric putter, communication pipe, flexible groove, vacuum pump, draw-in groove and air-out hole, the inside at last mould is installed to the flexible groove, the internally mounted of flexible groove has the draw-in groove that is located the bottom of flexible groove, the inside of flexible groove is provided with the communication pipe, electric putter is installed on the top of communication pipe, the one end of communication pipe is connected with the vacuum pump, the bottom of flexible groove one end is provided with the air-out hole, hydraulic cylinder is installed to the both sides at last mould bottom, the bed die is installed to the bottom of hydraulic cylinder, the inside bottom of bed die is provided with demoulding structure, the inside of bed die is provided with cooling structure.
Wherein, demoulding mechanism is including expansion plate, joint groove and expansion spring, and the top at the bed die is fixed in the joint groove, and the expansion plate is installed on the top of joint groove, and the internally mounted in expansion plate and joint groove has expansion spring, and the internal diameter of joint groove is greater than the external diameter of expansion plate, and expansion spring is the interval arrangement of layer on the top of joint groove. After the die casting of mould is good, hydraulic cylinder stretches out and draws back, can drive the mould and rise, can promote the expansion plate through the elasticity of expansion spring self and rise to promote the mould at top and rise, can conveniently take out the mould at this moment, thereby reach quick drawing of patterns.
The existing anti-deformation vacuumizing die-casting die can realize vacuumizing, die-casting die cooling and automatic demoulding functions; however, the demolding is realized by using the telescopic spring, so that pouring liquid needs to overcome the reaction force of the telescopic spring when the product is subjected to die casting, and the pouring pressure is high; in addition, although the lower die is internally provided with a cooling structure, in order to ensure the processing efficiency, the cooling during the demolding is not thorough, and the demolded product still has a certain temperature, so that the taking out of the product is not facilitated.
Disclosure of Invention
The invention aims to provide a vacuum pumping structure and a method for a die casting die, which have small pouring pressure and can further cool the surface of a product during demolding, and at least provide a beneficial selection or creation condition for solving one or more technical problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A vacuum pumping structure for a die casting mold, comprising.
The sealing box is internally provided with an upper die and a lower die which are matched with each other, the lower die is provided with a liquid storage cavity and an air cavity, the liquid storage cavity is arranged around the die cavity of the lower die and used for radiating, and the air cavity is positioned at the lower side of the die cavity of the lower die; the die comprises a lower die, a lower die and a lower die, wherein a through hole communicated with the air cavity is formed in the bottom of the die cavity of the lower die, a limiting block is slidably connected in the through hole, an upper clamping block is arranged on the upper end face of the limiting block, a lower clamping block is arranged on the lower end face of the limiting block, an exhaust hole is formed in the limiting block, and the exhaust hole penetrates through the lower end face of the lower clamping block and the side face of the limiting block to be used for realizing communication between the air cavity and the die cavity of the lower die.
The supercharging box is communicated with the air cavity through an air inlet pipe and provides high-pressure air for the air cavity, and a first on-off valve is arranged on the air inlet pipe and used for controlling on-off of the air inlet pipe; the pressurizing box is also communicated with the sealing box through a vacuumizing pipe and is used for vacuumizing the sealing box, a vacuum pump and a second on-off valve are arranged on the vacuumizing pipe, and the second on-off valve is used for controlling on-off of the vacuumizing pipe.
The cooling box is communicated with the liquid storage cavity through a circulating pipe, and a liquid pump and a cooling liquid circulation flow and heat dissipation device are arranged on the circulating pipe.
And the mold opening and closing power mechanism is used for opening and closing the upper mold and the lower mold.
And the material injection mechanism is used for injecting raw materials to be solidified into the die cavity.
And the control device is connected with the die opening and closing power mechanism, the material injection mechanism, the first on-off valve, the vacuum pump, the second on-off valve and the liquid pump in a control manner and is used for realizing cooperative work and control.
More preferably, the seal box, the pressurizing box, and the cooling box are mounted on the same table.
More preferably, a limiting rod is fixedly connected in the sealing box, the upper die is slidably mounted on the limiting rod, and the lower die is fixed in the sealing box.
More preferably, the material injection mechanism comprises a material storage box arranged on the upper die, and the material storage box is connected with a discharging pipe, a feeding pipe and a material injection power mechanism.
One end of the discharging pipe is communicated with the storage box, and the other end of the discharging pipe penetrates through the upper die and is communicated with a die cavity of the upper die.
The feeding pipe is used for adding raw materials to be solidified for the storage box, and a detachable sealing cover is arranged on a feeding hole of the feeding pipe.
The material injection power mechanism comprises a hydraulic rod and a piston plate, the side face of the piston plate is in sliding connection with the inner wall of the storage box and is attached to the inner wall of the storage box, and the telescopic end of the hydraulic rod penetrates through the side wall of the storage box and is connected with the piston plate and used for pushing the piston plate to move back and forth so as to inject the raw materials to be solidified in the storage box into the die cavity.
More preferably, the die opening and closing power mechanism comprises a hydraulic cylinder arranged on the sealing box, and the telescopic end of the hydraulic cylinder penetrates through the side wall of the sealing box to be connected with the upper die and used for driving the upper die to perform lifting movement.
More preferably, a limiting ring is arranged in the through hole, and the limiting block is slidably arranged in the limiting ring.
More preferably, the sealing box is provided with a pressure sensor connected with the control device, and a monitoring end of the pressure sensor penetrates through the side wall of the sealing box and is used for detecting the vacuum degree in the sealing box.
More preferably, an infrared temperature sensor connected with the control device is arranged on the sealing box, a monitoring end of the infrared sensor penetrates through the inner wall of the sealing box, and the infrared temperature sensor is used for detecting the temperature of the die.
More preferably, an openable cover plate is arranged on one side of the sealing box, the cover plate is installed on the side opening of the sealing box through a hinge, and sealing connection is formed between the cover plate and the side opening of the sealing box.
In another aspect, the present invention provides a control method of a vacuum pumping structure for a die casting mold, which is implemented based on the vacuum pumping structure for a die casting mold as described above, comprising the steps of.
And S1, adding raw materials to be solidified into a material injection mechanism.
And S2, starting a vacuum pump to pump air in the sealing box, when the air pressure in the sealing box is lower than the air pressure in the air cavity, the limiting block can move upwards under the action of the pressure, and the air cavity is pumped through the exhaust hole, so that the pressure in the air cavity is equal to the pressure in the sealing box and is vacuum, and at the moment, the limiting block drives the upper clamping block to be clamped in the through hole under the action of gravity.
And S3, closing the second on-off valve and the vacuum pump to prevent the compressed gas in the pressurizing box from flowing back into the sealing box.
And S4, starting a die opening and closing power mechanism to drive the upper die and the lower die to be matched, and then starting a material injection mechanism to inject the raw materials to be solidified into the die cavity after the die matching for die casting.
And S5, starting a liquid pump to drive the cooling liquid to circularly flow between the liquid storage cavities of the cooling box, and cooling the die cavities.
And S6, closing the liquid pump, opening the first on-off valve to enable air in the pressurizing box to flow into the air cavity to jack up the limiting block upwards, driving the upper clamping block to jack up the formed workpiece upwards to be demolded, and enabling air to enter between the lower die and the workpiece through the air vent to conduct secondary heat dissipation on the workpiece.
The invention has at least the following advantages.
According to the invention, air in the sealing box is pumped into the pressurizing box through the vacuum pump, then the controller opens the first on-off valve to enable the air to enter the air cavity through the air inlet pipe, the limiting block can jack up the formed workpiece upwards, when the air in the pressurizing box enters the air cavity to jack up the limiting block upwards, the air can enter the lower die through the air exhaust hole, the surface of the workpiece can be blown for secondary heat dissipation, the demolding and cooling effects are achieved, and workers can directly take the die.
Drawings
Fig. 1 is a schematic structural diagram of a vacuum pumping structure for a die casting mold according to the present invention.
Fig. 2 is a schematic structural view of a vacuum pumping structure seal box for a die casting mold according to the present invention.
Fig. 3 is a schematic structural view of an air inlet pipe with a vacuum air suction structure for a die casting mold according to the present invention.
Fig. 4 is a schematic structural view of a discharging pipe of a vacuum pumping structure for a die casting mold according to the present invention.
Fig. 5 is a schematic structural diagram of a die on a vacuum pumping structure for a die casting die according to the present invention.
Fig. 6 is a schematic cross-sectional view of a lower die of a vacuum pumping structure for a die casting die according to the present invention.
Fig. 7 is a schematic cross-sectional view of a storage tank with a vacuum pumping structure for a die casting mold according to the present invention.
Fig. 8 is a schematic structural view of a vacuum pumping structure stop collar for a die casting mold according to the present invention.
Fig. 9 is a schematic structural view of a stopper with a vacuum pumping structure for a die casting mold according to the present invention.
Fig. 10 is a control structure diagram of a vacuum pumping junction structure for a die casting mold according to the present invention.
Reference numerals illustrate.
1: Work table, 2: sealing box, 3: hinge, 4: cover plate, 5: hydraulic cylinder, 6: infrared temperature sensor, 7: pressurizing box, 8: controller, 9: cooling box, 10: liquid pump, 11: pressure sensor, 12: lower die, 13: upper die, 14: limit lever, 15: air inlet pipe, 16: first solenoid valve, 17: second solenoid valve, 18: vacuum pump, 19: hydraulic stem, 20: storage box, 21: sealing cover, 22: discharge pipe, 23: heat radiation fins, 24: liquid storage cavity, 25: air cavity, 26: limiting block, 261: upper fixture block, 262: vent holes, 263: lower fixture block, 27: feeding pipe, 28: piston plate, 29: drain pipe, 30: liquid inlet pipe, 31: through holes, 32: and a limiting ring.
Detailed Description
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Referring to fig. 1-10, a vacuum pumping structure for a die casting mold comprises a workbench 1, wherein the upper end surface of the workbench 1 is fixedly connected with a sealing box 2, a limiting rod 14 is fixedly connected in the sealing box 2, the surface of the limiting rod 14 is slidably connected with an upper mold 13, the upper end surface of the upper mold 13 is fixedly connected with a storage box 20, the upper end surface of the sealing box 2 is fixedly connected with a hydraulic cylinder 5, the hydraulic cylinder 5 can drive the upper mold 13 to move downwards through the arrangement of the hydraulic cylinder 5, the die assembly between the upper mold 13 and a lower mold 12 is realized, the upper mold 13 is moved upwards after die casting is finished, the die assembly is convenient for workers to take, the model of the hydraulic cylinder 5 is 63X50-10, and a manufacturer is a snood.
The telescopic end of the hydraulic cylinder 5 penetrates through the inner wall of the sealing box 2 and the upper end face of the storage box 20 to be fixedly connected, the front face of the storage box 20 is fixedly connected with a discharging pipe 22, one end of the discharging pipe 22 is communicated with the inside of the storage box 20, the other end of the discharging pipe 22 penetrates through the lower end face of the upper die 13, the inside of the sealing box 2 is fixedly connected with a lower die 12, a liquid storage cavity 24 is formed in the lower die 12, the upper end face of the workbench 1 is fixedly connected with a pressurizing box 7, the upper end face of the workbench 1 is fixedly connected with a vacuum pump 18, the air extraction end of the vacuum pump 18 is communicated with the inside of the sealing box 2, the air outlet end of the vacuum pump 18 is communicated with the inside of the pressurizing box 7, the right side face of the pressurizing box 7 is fixedly connected with an air inlet pipe 15, an air cavity 25 is formed in the inside of the lower die 12, the right end of the air inlet pipe 15 penetrates through the sealing box 2 and the side wall of the lower die 12 to be communicated with the inside of the air cavity 25, a through hole 31 is formed in the upper end face of the lower die 12, a limiting ring 32 is fixedly connected with a limiting ring 32, the bottom end of the through hole 31 is communicated with the inside of the air cavity 25, a limiting ring 32 is in a sliding connection with a limiting block 26, and when air in the box 7 enters the inside of the pressurizing box 25 and drives the limiting block 26 to move upwards, and a workpiece can be lifted upwards by a person to be conveniently taking a workpiece.
The up end fixedly connected with upper fixture block 261 of stopper 26, the lower terminal surface fixedly connected with lower fixture block 263 of stopper 26, vent 262 has been seted up in the stopper 26, vent 262 runs through the lower terminal surface of lower fixture block 263 and communicates with the interior of air cavity 25, the up end fixedly connected with pressure sensor 11 of seal box 2, the up end fixedly connected with infrared temperature sensor 6 of seal box 2, the up end fixedly connected with controller 8 of pressure boost case 7, the model of controller 8 is 6ES7515-2AM02-0AB0, the manufacturer is Zhejiang hong letter automation science and technology Co.
The surface mounting of intake pipe 15 has first solenoid valve 16, through setting up first solenoid valve 16, first solenoid valve 16 can realize being linked together between seal box 2 and the pressure boost case 7, the end surface mounting that gives vent to anger of vacuum pump 18 has second solenoid valve 17, through setting up second solenoid valve 17, after forming the negative pressure in seal box 2, close second solenoid valve 17 can avoid the gaseous backward flow in the pressure boost case 7 to the seal box 2 in, the output of controller 8 and the input electric connection of first solenoid valve 16, the output of controller 8 and the input electric connection of second solenoid valve 17.
The monitoring end of the pressure sensor 11 penetrates through the inner wall of the sealing box 2, the monitoring end of the infrared sensor penetrates through the inner wall of the sealing box 2, the input end of the controller 8 is electrically connected with the output end of the pressure sensor 11, and the input end of the controller 8 is electrically connected with the output end of the infrared temperature sensor 6.
The cooling box 9 is fixedly connected to the upper end face of the workbench 1, the liquid pump 10 is fixedly connected to the upper end face of the workbench 1, the model of the liquid pump 10 is TW24-300B, the manufacturing factory is new world pump industry, the liquid inlet end of the liquid pump 10 is communicated with the cooling box 9, the liquid outlet end of the liquid pump 10 is provided with the liquid outlet pipe 29, one end of the liquid outlet pipe 29 penetrates through the side wall of the sealing box 2 and the lower die 12 at the same time and is communicated with the liquid storage cavity 24, the liquid inlet pipe 30 is fixedly connected to the left side face of the cooling box 9, the right end of the liquid inlet pipe 30 is communicated with the cooling box 9, the left end of the liquid inlet pipe 30 penetrates through the sealing box 2 and the side wall of the lower die 12 at the same time and is communicated with the liquid storage cavity 24, the upper end face of the cooling box 9 is fixedly connected with the cooling fins 23, the cooling fins 23 can increase the cooling area of the cooling box 9 through the arrangement of the cooling fins, the cooling rate of cooling liquid can be accelerated, and the cooling rate of the cooling liquid to the metal liquid can be increased.
The upper end face fixedly connected with hinge 3 of seal box 2, the surface hinge 3 of hinge 3 is connected with apron 4, through setting up apron 4, apron 4 sealing connection is on seal box 2 when evacuating seal box 2, and the side sealing connection of apron 4 and the side of seal box 2.
The upper end face of the upper die 13 is fixedly connected with a hydraulic rod 19, the hydraulic rod 19 is arranged, the model of the hydraulic rod 19 is SYQ8/18-09, a manufacturer is a sand collection gas spring limited company in Changzhou, a piston plate 28 is arranged at the telescopic end of the hydraulic rod 19 penetrating through the inner wall of the storage box 20, the piston plate 28 is arranged, the hydraulic rod 19 can drive the piston plate 28 to push molten metal into a cavity between the upper die 13 and the lower die 12 through a discharging pipe 22, the side face of the piston plate 28 is in sliding connection with the inner wall of the storage box 20 and is attached to the inner wall of the storage box 20, a feeding pipe 27 is fixedly connected to the right side face of the storage box 20, the left end of the feeding pipe 27 is communicated with the inside of the storage box 20, and a sealing cover 21 is connected to the surface of the feeding pipe 27 in a sealing mode.
Specifically, first, the staff adds molten metal into the storage box 20 through the feed pipe 27, then screws up the sealing cover 21 to seal, the staff closes the cover plate 4, at this moment, the staff starts the vacuum pump 18 through the controller 8, the vacuum pump 18 can bleed air in the sealing box 2, when the air pressure in the sealing box 2 is lower than the air pressure in the air cavity 25, the stopper 26 can upwards move under the effect of pressure, the air cavity 25 can be bled through the exhaust hole 262, the air cavity 25 is equal to the pressure in the sealing box 2 and is vacuum, at this moment, the stopper 26 drives the upper clamping block 261 to be clamped in the through hole 31 under the action of gravity.
The vacuum pump 18 compresses the pumped gas into the pressurizing box 7, and when the gas in the sealing box 2 is pumped into the pressurizing box 7, the pressure sensor 11 displays that the pressure value in the sealing box 2 just reaches the set value, and the controller 8 turns off the vacuum pump 18.
The controller 8 controls the second electromagnetic valve 17 to be closed again, so that compressed gas in the pressurizing box 7 is prevented from flowing back into the sealing box 2, the controller 8 restarts the hydraulic cylinder 5 to drive the upper die 13 to move downwards to be matched with the lower die 12, then the controller 8 restarts the hydraulic rod 19 to drive the piston plate 28 to move leftwards, and molten metal can be extruded into a cavity between the upper die 13 and the lower die 12 through the discharging pipe 22 to be die-cast.
Then the infrared temperature sensor 6 detects the temperature rise of the lower die 12, at this time, the controller 8 starts the liquid pump 10, the liquid pump 10 can drive the cooling liquid to flow into the liquid storage cavity 24 through the liquid outlet pipe 29, then the cooling liquid absorbing heat flows back to the cooling box 9 through the liquid inlet pipe 30, and the cooling liquid is accelerated to dissipate heat through the cooling fins 23, so that the cooling liquid can be recycled.
When the temperature sensor 6 detects that the temperature is reduced to a set value, the controller 8 closes the liquid pump 10 and then opens the first electromagnetic valve 16, so that air in the pressurizing box 7 flows into the air cavity 25 through the air inlet pipe 15, then the air jack-up the limiting block 26 upwards, and the limiting block 26 drives the upper clamping block 261 to jack-up the molded workpiece upwards for demolding.
Wherein, because the lower opening of the air cavity 25 is larger than the upper opening, the kinetic energy is increased when the air flows upwards from the lower direction, the thrust to the lower clamping block 263 is enhanced, so that the upper movement of the lower clamping block 263, the limiting block 26 and the upper clamping block 261 faster pushes up the workpiece, and the demolding speed of the workpiece is accelerated.
The lower clamping block 263 cannot move upwards continuously under the limit of the limiting ring 32, at this time, gas can enter between the lower die 12 and the workpiece through the exhaust hole 262, air flow is diffused from the bottom of the workpiece to the periphery, and then the workpiece is subjected to secondary heat dissipation, residual waste heat on the surface of the workpiece is taken away, and the workpiece can be conveniently taken by workers.
It should be further noted that, in the description of the present invention, terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. refer to the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (10)
1. A vacuum pumping structure for a die casting die, comprising:
The sealing box is internally provided with an upper die and a lower die which are matched with each other, the lower die is provided with a liquid storage cavity and an air cavity, the liquid storage cavity is arranged around the die cavity of the lower die and used for radiating, and the air cavity is positioned at the lower side of the die cavity of the lower die; the bottom of the die cavity of the lower die is provided with a through hole communicated with the air cavity, a limiting block is connected in a sliding manner in the through hole, the upper end face of the limiting block is provided with an upper clamping block, the lower end face of the limiting block is provided with a lower clamping block, an exhaust hole is formed in the limiting block, and the exhaust hole penetrates through the lower end face of the lower clamping block and the side face of the limiting block to be communicated between the air cavity and the die cavity of the lower die;
The supercharging box is communicated with the air cavity through an air inlet pipe and provides high-pressure air for the air cavity, and a first on-off valve is arranged on the air inlet pipe and used for controlling on-off of the air inlet pipe; the pressurizing box is also communicated with the sealing box through a vacuumizing pipe and is used for vacuumizing the sealing box, a vacuum pump and a second on-off valve are arranged on the vacuumizing pipe, and the second on-off valve is used for controlling the on-off of the vacuumizing pipe;
the cooling box is communicated with the liquid storage cavity through a circulating pipe, and a liquid pump and a cooling device for realizing circulating flow and heat dissipation of cooling liquid are arranged on the circulating pipe;
The mold opening and closing power mechanism is used for opening and closing the upper mold and the lower mold;
The material injection mechanism is used for injecting raw materials to be solidified into the die cavity;
and the control device is connected with the die opening and closing power mechanism, the material injection mechanism, the first on-off valve, the vacuum pump, the second on-off valve and the liquid pump in a control manner and is used for realizing cooperative work and control.
2. A vacuum pumping structure for a die casting mold as defined in claim 1, wherein said seal box, said pressurizing box and said cooling box are mounted on the same table.
3. The vacuum pumping structure for a die casting mold as defined in claim 1, wherein a stopper rod is fixedly connected in the sealing case, the upper mold is slidably mounted on the stopper rod, and the lower mold is fixed in the sealing case.
4. The vacuum pumping structure for a die casting mold according to claim 1, wherein the material injection mechanism comprises a material storage box mounted on the upper mold, and a material discharging pipe, a material feeding pipe and a material injection power mechanism are connected to the material storage box;
One end of the discharging pipe is communicated with the storage box, and the other end of the discharging pipe penetrates through the upper die and is communicated with a die cavity of the upper die;
the feeding pipe is used for adding raw materials to be solidified for the storage box, and a detachable sealing cover is arranged on a feeding hole of the feeding pipe;
The material injection power mechanism comprises a hydraulic rod and a piston plate, the side face of the piston plate is in sliding connection with the inner wall of the storage box and is attached to the inner wall of the storage box, and the telescopic end of the hydraulic rod penetrates through the side wall of the storage box and is connected with the piston plate and used for pushing the piston plate to move back and forth so as to inject the raw materials to be solidified in the storage box into the die cavity.
5. The vacuum pumping structure for a die casting mold according to claim 1, wherein the mold opening and closing power mechanism comprises a hydraulic cylinder installed on the sealing box, and a telescopic end of the hydraulic cylinder penetrates through a side wall of the sealing box to be connected with the upper mold and is used for driving the upper mold to perform lifting movement.
6. A vacuum pumping arrangement for a die casting mold as defined in claim 1, wherein a stop collar is provided in said through hole, said stop collar being slidably mounted within said stop collar.
7. The vacuum pumping structure for a die casting mold according to claim 1, wherein a pressure sensor connected with the control device is provided on the sealing box, and a monitoring end of the pressure sensor penetrates through a side wall of the sealing box to detect the vacuum degree in the sealing box.
8. The vacuum pumping structure for a die casting mold according to claim 1, wherein an infrared temperature sensor connected with the control device is provided on the sealing box, a monitoring end of the infrared sensor penetrates through an inner wall of the sealing box, and the infrared temperature sensor is used for detecting a temperature of the mold.
9. The vacuum pumping structure for a die casting mold as defined in claim 1, wherein an openable cover plate is provided at one side of the sealing case, the cover plate is mounted on a side opening of the sealing case by a hinge, and a sealing connection is formed between the cover plate and the side opening of the sealing case.
10. A control method of a vacuum pumping arrangement for a die casting mold, characterized in that it is realized based on a vacuum pumping arrangement for a die casting mold according to any one of claims 1-9, comprising the steps of:
Step S1, adding raw materials to be solidified into a material injection mechanism;
S2, starting a vacuum pump to pump air in the sealed box, when the air pressure in the sealed box is lower than the air pressure in the air cavity, the limiting block moves upwards under the action of the pressure, and the air cavity is pumped through the exhaust hole, so that the air cavity and the pressure in the sealed box are both in vacuum, and at the moment, the limiting block drives the upper clamping block to be clamped in the through hole under the action of gravity;
s3, closing a second on-off valve and a vacuum pump to prevent compressed gas in the pressurizing box from flowing back into the sealing box;
S4, starting a die opening and closing power mechanism to drive an upper die and a lower die to be matched, and then starting a material injection mechanism to inject raw materials to be solidified into a die cavity after the die matching for die casting;
Step S5, starting a liquid pump to drive cooling liquid to circularly flow between liquid storage cavities of the cooling box, and cooling the die cavities;
and S6, closing the liquid pump, opening the first on-off valve to enable air in the pressurizing box to flow into the air cavity to jack up the limiting block upwards, driving the upper clamping block to jack up the formed workpiece upwards to be demolded, and enabling air to enter between the lower die and the workpiece through the air vent to conduct secondary heat dissipation on the workpiece.
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| CN202410036358.3A CN118023494A (en) | 2024-01-10 | 2024-01-10 | Vacuum air extraction structure and method for die casting die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118636266A (en) * | 2024-06-25 | 2024-09-13 | 宜兴市瑞弘耐火材料有限公司 | A kind of high aluminum casting material prefabricated part production equipment and process |
| CN118682102A (en) * | 2024-08-23 | 2024-09-24 | 宁波赛维达技术股份有限公司 | An integrated die-casting mold for new energy vehicle filters |
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- 2024-01-10 CN CN202410036358.3A patent/CN118023494A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118636266A (en) * | 2024-06-25 | 2024-09-13 | 宜兴市瑞弘耐火材料有限公司 | A kind of high aluminum casting material prefabricated part production equipment and process |
| CN118682102A (en) * | 2024-08-23 | 2024-09-24 | 宁波赛维达技术股份有限公司 | An integrated die-casting mold for new energy vehicle filters |
| CN118682102B (en) * | 2024-08-23 | 2024-11-12 | 宁波赛维达技术股份有限公司 | An integrated die-casting mold for new energy vehicle filters |
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