CN111271496B - Exhaust valve with self-cleaning mechanism for vacuum die casting die - Google Patents
Exhaust valve with self-cleaning mechanism for vacuum die casting die Download PDFInfo
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- CN111271496B CN111271496B CN202010124764.7A CN202010124764A CN111271496B CN 111271496 B CN111271496 B CN 111271496B CN 202010124764 A CN202010124764 A CN 202010124764A CN 111271496 B CN111271496 B CN 111271496B
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- valve plate
- self
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- 238000004512 die casting Methods 0.000 title claims abstract description 57
- 238000004140 cleaning Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000006082 mold release agent Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- 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
- B22D17/145—Venting means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
- F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of die casting dies, in particular to an exhaust valve for a vacuum die casting die with a self-cleaning mechanism, which comprises the self-cleaning mechanism, a first valve plate, a second valve plate, a front die frame and a rear die frame, wherein the first valve plate and the second valve plate jointly enclose an exhaust channel; the upper part of the inner side wall of the exhaust groove is provided with an internal thread, the baffle cover is arranged on the upper part of the exhaust groove, the outer side of the baffle cover is provided with an external thread matched with the internal thread, the bottom end surface of the baffle cover extends inwards to form a baffle ring, a vacuum hole is formed in the baffle ring, the middle part of the top end surface of the valve core protrudes to form a sealing part with the same size as the vacuum hole, and the valve core is further provided with a plurality of gas through holes which are arranged on the outer periphery of the sealing part and are arranged at intervals.
Description
Technical Field
The invention relates to the technical field of die casting dies, in particular to an exhaust valve with a self-cleaning mechanism for a vacuum die casting die.
Background
In the field of die casting industry, most die casting dies are equipped with a vent valve. The exhaust valve has the main effects that in the die casting process, gas in the cavity is effectively exhausted, poor filling, cold insulation and the like of die casting products are reduced, poor filling caused by poor exhaust is avoided, and further the quality and performance of the products are improved. The exhaust valve is not only used for a common die-casting die, but also used for a vacuum die-casting die, and plays a role of a mechanical exhaust valve, so that the use of the exhaust valve is particularly important.
The traditional exhaust valve consists of two elements, one of which is arranged on the movable mould frame and the other is arranged on the static mould frame, and the two elements are matched for use. For the exhaust valve adopting the vacuum die casting die, besides adding corresponding vacuumizing parts or parts, holes are necessarily formed in one element of the exhaust valve for vacuumizing, so that negative pressure is formed in the inner space of two elements of the exhaust valve, and the space is communicated with the die cavity, so that gas in the die cavity is pumped out, and the vacuumizing process is completed. In the production process, the end part of the exhaust valve often generates dirt during die casting due to different production working conditions, and the dirt is derived from metal particles, mold stripping agents, filter residues and the like. The presence of such contaminants can affect the exhaust effect and performance of the exhaust valve, reducing the exhaust effect. Particularly, in the vacuum die casting process, dirt can enter a vacuum pumping system along a vacuum pumping hole arranged on an exhaust valve, so that the vacuum pipeline and the vacuum system are polluted, and the production and the manufacture are seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an exhaust valve with a self-cleaning mechanism for a vacuum die casting die, which can further improve the effect of vacuum die casting and improve the quality of die casting products.
The aim of the application is achieved by the following technical scheme: the application provides an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism, which is characterized by comprising a self-cleaning mechanism, a first valve plate, a second valve plate, a front mold frame and a rear mold frame, wherein the front mold frame is provided with a first mounting position for mounting the first valve plate and first mounting grooves which are arranged in pairs and are positioned on two sides of the first mounting position; the self-cleaning mechanism comprises two pairs of self-cleaning components which are respectively arranged in the paired first mounting grooves and the paired second mounting grooves in a lifting manner; the first valve plate and the second valve plate are respectively provided with a first air cavity and a second air cavity, and the first air cavity and the second air cavity jointly enclose an exhaust channel; an exhaust groove communicated with the exhaust channel is formed in the second valve plate downwards towards the end face of the first valve plate, and an exhaust port communicated with the exhaust groove is formed in the side of the second valve plate and communicated with the vacuumizing equipment; the upper part of the inner side wall of the exhaust groove is provided with an internal thread, the baffle cover is arranged on the upper part of the exhaust groove, the outer peripheral side of the baffle cover is provided with an external thread matched with the internal thread, the bottom surface of the baffle cover extends inwards to form a baffle ring, so that a vacuum hole is formed in the baffle ring, the middle part of the top surface of the valve core protrudes to form a sealing part with the same size as the vacuum hole, the valve core is also provided with a plurality of gas through holes which are arranged at the periphery of the sealing part and are arranged at intervals, a reset spring is arranged between the bottom of the valve core and the bottom of the exhaust groove, and in the mold opening state, the reset spring props against the valve core, so that the sealing part is positioned in the vacuum hole and forms a seal.
Each self-cleaning assembly comprises a fixed block, a spraying cavity, a spring, a cavity sealing head and an adjusting screw rod; the fixed block is provided with a fixed block threaded hole and a fixed block adjusting screw fixing hole, and is fixedly arranged in the first mounting groove or the second mounting groove through the fixed block threaded hole; the injection cavity is provided with a gas cavity and a release agent cavity, both sides of the gas cavity and both sides of the release agent cavity are provided with sealing pipe threads matched with the cavity sealing head, the top end surface of the injection cavity is provided with a plurality of injection cavity adjusting screw fixing holes, and one injection side of the injection cavity is provided with a plurality of nozzle openings which are distributed at intervals; the adjusting screw comprises a bolt and a nut, the bolt is connected with the nut after being inserted into the adjusting screw fixing hole of the injection cavity, the bottom end of the bolt is connected with the adjusting screw fixing hole of the fixing block, and the spring is sleeved at the bottom of the bolt.
The bottom of the first air cavity and the bottom of the second air cavity are respectively provided with a first wave part and a second wave part, and the first wave part and the second wave part are staggered in an assembly state.
Wherein, the second installation position still is provided with the mounting panel, mounting panel and second valve plate fixed connection, and the second spacing groove has been seted up to the second installation position, and the bottom surface middle part of mounting panel extends the second spacing down, and under the assembled state, the spacing inslot of second spacing is inserted to the second.
Wherein, a plurality of buffer slots are all offered to the bottom end face of second valve plate and the top end face of mounting panel, are provided with buffer spring in the buffer slot of mounting panel.
The first mounting position is provided with a first limiting groove, the middle of the bottom end surface of the first valve plate downwards extends out of a first limiting strip, and the first limiting strip is inserted into the first limiting groove in an assembled state.
The application has the beneficial effects that: compared with the prior art, the exhaust valve with the self-cleaning mechanism for the vacuum die casting die has the advantages that the probability of pollution in a vacuum pipeline in the vacuum die casting process is obviously reduced, the production efficiency is improved, the shutdown caused by cleaning after the pollution of the vacuum pipeline is avoided, the possibility of pollution on the surface of the exhaust valve in the die casting process is reduced, the exhaust effect is improved to a certain extent, the fluidity of molten metal in a cavity is increased, and the filling effect is improved; the exhaust valve has the characteristics of simple and compact structure, no need of manual operation, capability of avoiding the pollution of the surfaces of the vacuum pipeline and the exhaust valve, easiness in production, processing and popularization, lower material cost, no need of maintenance and the like, suitability for various molds adopting a vacuum die casting process, simple structure, capability of effectively controlling the pollution of the surfaces of the exhaust valve and the vacuum pipeline without manual operation and capability of effectively improving the production efficiency and the quality of die casting products.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
Fig. 1 is a schematic structural view of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 2 is a schematic view of a rear mold structure of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 3 is a schematic diagram of a front mold structure of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 4 is a schematic view of a spray cavity of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 5 is a schematic view of a fixed block of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 6 is a schematic view of a second valve plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 1.
Fig. 7 is a schematic view of a second valve plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 2.
Fig. 8 is a schematic view of a second valve plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 3.
Fig. 9 is a schematic view of a cover of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 10 is a schematic valve core diagram of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 11 is a schematic view of a mounting plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 1.
Fig. 12 is a schematic view of a mounting plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 2.
Fig. 13 is a schematic view of a first valve plate of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 14 is a schematic view of an adjusting screw of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism.
Fig. 15 is a schematic view of a rear mold frame mounting hole of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 1.
Fig. 16 is a schematic view of a rear mold frame mounting hole of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 2.
Fig. 17 is a schematic view of a front mold frame mounting hole of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 1.
Fig. 18 is a schematic view of a front mold frame mounting hole of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism 2.
Reference numerals: the front mold frame 1, the first mounting position 11, the first mounting groove 12, the first limit groove 13, the rear mold frame 2, the second mounting position 21, the second mounting groove 22, the second limit groove 23, the first valve plate 3, the first air chamber 31, the first limit bar 32, the second valve plate 4, the air outlet 41, the buffer groove 42, the buffer spring 43, the return spring 44, the air outlet 45, the internal thread 46, the second air chamber 47, the mounting plate 5, the second limit bar 51, the self-cleaning assembly 6, the adjusting screw 600, the injection cavity 61, the injection cavity adjusting screw fixing hole 62, the sealing pipe thread 63, the nozzle opening 64, the cavity sealing head 65, the spring 66, the fixing block 7, the fixing block screw hole 71, the fixing block adjusting screw fixing hole 72, the blocking cover 8, the external thread 81, the blocking ring 82, the vacuum hole 83, the valve core 9, the sealing part 91, the gas through hole 92.
Detailed Description
The invention will be further described with reference to the following examples.
As shown in fig. 1 to 18, a specific embodiment of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism of the present invention includes a self-cleaning mechanism, a first valve plate 3, a second valve plate 4, a front mold frame 1 and a rear mold frame 2, wherein the front mold frame 1 is provided with a first mounting position 11 for mounting the first valve plate 3 and with first mounting grooves 12 which are paired and located at both sides of the first mounting position 11, and the rear mold frame 2 is provided with a second mounting position 21 for mounting the second valve plate 4 and with second mounting grooves 22 which are paired and located at both sides of the second mounting position 21.
In the present embodiment, the self-cleaning mechanism comprises two pairs of self-cleaning assemblies 6, the two pairs of self-cleaning assemblies 6 being respectively liftably mounted in the pairs of first mounting grooves 12 and in the pairs of second mounting grooves 22. Each self-cleaning assembly 6 comprises a fixed block 7, a spray chamber 61, a spring 66, a chamber sealing head 65 and an adjusting screw 600. The fixing block 7 is provided with a threaded hole of the fixing block and a fixing hole for inserting the adjusting screw 600, and the fixing block 7 is fixedly arranged in the first mounting groove 12 or the second mounting groove 22 through the threaded hole, namely, the threaded hole of the fixing block 7 is used for fixing the fixing block 7 on the front die frame 1 or the rear die frame 2. The fixing hole of the adjusting screw 600 is used for fixing one end of the adjusting screw 600 in the fixing hole of the adjusting screw 600 of the fixing block 7, and the other end of the adjusting screw 600 is fixed in the fixing hole of the adjusting screw 600 of the injection cavity 61. The injection cavity 61 is provided with a gas cavity and a demoulding agent cavity, both ends of the two cavities are provided with sealing pipe threads 63, and the cavity wall is provided with evenly distributed nozzle threads on one side of the exhaust valve for connection with a standard nozzle. The end of the cavity near one side of the interior of the mold is sealed with the cavity by a cavity sealing head 65. The air pipe of the external automatic release agent spraying manipulator is connected through the pipe thread arranged on the air cavity by the connecting piece. The release agent pipe of the external automatic release agent spraying manipulator is connected through pipe threads arranged on the release agent cavity by a connecting piece. When the automatic mold release agent spraying mechanical arm sprays the mold release agent and the gas, the corresponding mold cavity can also spray the mold release agent and the gas at the same time. The adjusting screw 600 includes a bolt and a nut, the bolt is connected with the nut after being inserted into the injection cavity 61, the bottom end of the bolt is connected with the fixed block 7 and the fixed hole of the fixed block 7, and the spring 66 is sleeved at the bottom of the bolt, and is mainly used for adjusting and limiting the distance that the injection cavity 61 exposes out of the fixed block 7, so as to adjust the injection distance of the injection nozzle of the injection cavity 61, and the injection range of the injection nozzle covers the whole exhaust valve. The spring 66 is placed between the fixed block 7 and the injection cavity 61, the adjusting screw 600 passes through the inside of the spring 66 and fixes the injection cavity 61, when the injection cavity 61 has no external force, the injection cavity 61 protrudes out of the fixed block 7 by the action of the spring 66, and after the injection cavity 61 receives the external force, the injection cavity 61 is retracted inside the fixed block 7. The total height of the adjusting screw 600 is not greater than the total height of the fixing block 7 and the ejection chamber 61 when the spring 66 is compressed.
In the present embodiment, the exhaust valve is mainly composed of the first valve plate 3 and the second valve plate 4. The first valve plate 3 is provided with a thimble hole for placing the thimble, and after the die casting of the product is finished, the thimble will pass through the thimble hole to eject the slag. The first valve plate 3 is provided with fixing screw holes for fixing to the rear mold frame 2. The first valve plate 3 is provided with a convex wavy structure and is used for being matched with the concave wavy structure of the second valve plate 4 to form a certain space. The first valve plate 3 is provided with a positioning structure, specifically, the first mounting position 11 is provided with a first limit groove 13, the middle part of the bottom end surface of the first valve plate 3 downwards extends to form a first limit strip 32, and in an assembled state, the first limit strip 32 is inserted into the first limit groove 13 and used for limiting the position of the first valve plate 3 relative to the rear mold frame 2, so that the displacement of the first valve plate 3 caused by the impact of mold closing is avoided. The first valve plate 3 is provided with a gate for communication with the molten metal flow channel. The first valve plate 3 also leaves an exhaust space, in particular a triangular groove, for exhaust in cooperation with the exhaust groove 45 of the second valve plate 4.
In the embodiment, the front mold of the exhaust valve is divided into a second valve plate 4, a mounting plate 5, a positioning pin, a buffer spring 43, a baffle cover 8, a valve core 9 and a return spring 44. The second valve plate 4 is provided with a concave wave structure matched with the convex wave structure of the first valve plate 3, that is, the first valve plate 3 and the second valve plate 4 are respectively provided with a first air cavity 31 and a second air cavity 47, the first air cavity 31 and the second air cavity 47 jointly enclose an exhaust channel, the bottom of the first air cavity 31 and the bottom of the second air cavity 47 are respectively provided with a first wave part and a second wave part, and in the assembled state, the first wave part and the second wave part are staggered. The second valve plate 4 is provided with pin holes of the second valve plate 4, and is provided with positioning pins for being matched and fixed with the mounting plate 5. The second valve plate 4 is provided with a second valve plate 4 fixing threaded hole, and is mainly used for fixing with the mounting plate 5, and a certain amount of clearance is left between the second valve plate 4 and the mounting plate 5 after the fixing. A plurality of buffer grooves 42 are formed in the bottom end face of the second valve plate 4 and the top end face of the fixed block 7, and buffer springs 43 are arranged in the buffer grooves 42 of the fixed block 7. The buffer spring 43 compensates the cooperation between the second valve plate 4 and the first valve plate 3 to a certain extent, so that the flexible connection is realized, the possibility of material flying is avoided to a certain extent, and the sealing performance is improved.
As an improvement, the second valve plate 4 is provided with an exhaust groove 45 communicated with the exhaust channel downwards towards the end surface of the first valve plate 3, the side of the second valve plate 4 is provided with an exhaust port 41 communicated with the exhaust groove 45, and the exhaust port 41 is communicated with external vacuumizing equipment. The retaining cap 8 and the valve core 9 are sequentially arranged in the exhaust groove 45 from top to bottom, the inner screw thread 46 is arranged on the upper part of the inner side wall of the exhaust groove 45, the retaining cap 8 is arranged on the upper part of the exhaust groove 45, the outer screw thread 81 matched with the inner screw thread 46 is arranged on the outer peripheral side of the retaining cap, the retaining ring 82 extends inwards from the bottom surface of the retaining cap 8, so that the vacuum hole 83 is formed in the retaining ring 82, the middle part of the top surface of the valve core 9 protrudes to form a sealing part 91 with the same size as the vacuum hole 83, the valve core 9 is also provided with a plurality of gas through holes 92 which are arranged on the outer periphery of the sealing part 91 at intervals, a reset spring 44 is arranged between the bottom of the valve core 9 and the bottom of the exhaust groove 45, and when no external force acts, the valve core 9 is contacted with the retaining cap 8 under the action of the reset spring 44, and the vacuum hole 83 is sealed through the sealing part 91.
When the vacuumizing treatment is performed, the valve core 9 is forced to move downwards to the braking end surface of the valve core 9 due to the generation of pipeline negative pressure, and at the same time, the sealing part 91 on the valve core 9 is separated from the vacuum hole 83, and gas flows into the vacuum pipeline through the vacuum hole 83 and the gas through hole 92 arranged on the valve core 9, so that vacuumizing is realized. When the vacuumizing is stopped, under the action of the spring 66, the valve core 9 will contact with the blocking cover 8 again, and the sealing part 91 will seal the vacuum hole 83 again, so as to prevent the vacuum pipeline from being polluted when spraying and drying the release agent.
The invention relates to a working process of an exhaust valve for a vacuum die casting mold with a self-cleaning mechanism, wherein the self-cleaning mechanism is respectively arranged at two sides of a split body of the exhaust valve when the vacuum die casting mold is used, after the mold is closed, a spray cavity 61 is contracted by a pressure spring 66, so that the spray cavity 61 is compressed in a fixed block 7, at the moment, the die casting machine starts to perform injection, and because the internal space of the exhaust valve is the same as that of the mold cavity, when a vacuum system works, a pipeline generates negative pressure, a valve core 9 arranged on a second valve plate 4 is forced to move downwards to a braking end surface of the valve core 9, at the moment, a sealing part 91 on the valve core 9 is separated from a vacuum hole 83, and gas flows into the vacuum pipeline through the vacuum hole 83 and a gas through hole 92 arranged on the valve core 9, so that vacuumizing is realized. When the evacuation is stopped, the valve element 9 will again contact the flap 8 under the action of the spring 66, and the sealing portion 91 will again seal the vacuum hole 83. When the mold is opened, the spring 66 ejects the injection cavity 61 to expose the injection cavity to the fixed block 7, and when the automatic mold release agent spraying manipulator sprays the mold release agent and gas, the vacuum pipeline is prevented from being polluted because the vacuum hole 83 is sealed at the moment, and at the moment, the mold release agent pipeline and the gas pipeline of the manipulator are connected with the corresponding cavity of the injection cavity 61, so that when the manipulator starts spraying the mold release agent and blowing, the corresponding cavity on the injection cavity 61 can be sprayed and blown simultaneously through the nozzle. The area of the spray coverage can be adjusted by adjusting the ejection position of the spray cavity 61 by adjusting the screw 600, and when the spraying is finished, the mold is closed, and one production cycle is finished.
The exhaust valve with the self-cleaning mechanism for the vacuum die-casting die provided by the invention has the advantages that the probability of pollution in a vacuum pipeline in the vacuum die-casting process is obviously reduced, the production efficiency is improved, and the shutdown caused by cleaning after the pollution of the vacuum pipeline is avoided. In the die casting process, the possibility of dirt on the surface of the exhaust valve is reduced, the exhaust effect is improved to a certain extent, the fluidity of metal melt in the cavity is increased, the filling effect is improved, and the quality and the performance of die casting products are improved due to the increase of the internal area and the volume of the exhaust valve. The exhaust valve has the advantages of simple and compact structure, no need of manual operation, capability of avoiding surface pollution of a vacuum pipeline and an exhaust valve, easiness in production, processing and popularization, lower material cost, no need of maintenance and the like. The invention is suitable for various moulds adopting vacuum die casting technology, has the characteristics of simple structure, no need of manual operation, effective control of exhaust valve surface and vacuum pipeline pollution, and effective improvement of production efficiency and die casting product quality.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The exhaust valve for the vacuum die casting die is characterized by comprising a self-cleaning mechanism, a first valve plate, a second valve plate, a front die frame and a rear die frame, wherein the front die frame is provided with a first installation position for installing the first valve plate and first installation grooves which are paired and positioned on two sides of the first installation position, and the rear die frame is provided with a second installation position for installing the second valve plate and second installation grooves which are paired and positioned on two sides of the second installation position;
The self-cleaning mechanism comprises two pairs of self-cleaning components, and the two pairs of self-cleaning components are respectively arranged in the paired first mounting grooves and the paired second mounting grooves in a lifting manner;
The first valve plate and the second valve plate are respectively provided with a first air cavity and a second air cavity, and the first air cavity and the second air cavity jointly enclose an exhaust channel;
An exhaust groove communicated with the exhaust channel is formed in the second valve plate downwards towards the end face of the first valve plate, an exhaust port communicated with the exhaust groove is formed in the side of the second valve plate, and the exhaust port is communicated with the vacuumizing equipment;
The inner side of the exhaust groove is provided with a baffle cover and a valve core, the upper part of the inner side wall of the exhaust groove is provided with an inner thread, the baffle cover is arranged at the upper part of the exhaust groove, the outer periphery side of the baffle cover is provided with an outer thread matched with the inner thread, the bottom end surface of the baffle cover extends inwards to form a baffle ring so as to form a vacuum hole in the baffle ring, the middle part of the top end surface of the valve core protrudes to form a sealing part with the same size as the vacuum hole, the valve core is also provided with a plurality of gas through holes which are arranged at the periphery of the sealing part at intervals, a return spring is arranged between the bottom of the valve core and the bottom of the exhaust groove, and in a die-opening state, the return spring props against the valve core so that the sealing part is positioned in the vacuum hole and forms a seal;
Each self-cleaning assembly comprises a fixed block, a spraying cavity, a spring, a cavity sealing head and an adjusting screw rod; the fixed block is provided with a fixed block threaded hole and a fixed block adjusting screw fixing hole, and is fixedly arranged in the first mounting groove or the second mounting groove through the fixed block threaded hole; the injection cavity is provided with a gas cavity and a release agent cavity, both sides of the gas cavity and both sides of the release agent cavity are respectively provided with a sealing pipe thread matched with the cavity sealing head, the top end surface of the injection cavity is provided with a plurality of injection cavity adjusting screw fixing holes, and one injection side of the injection cavity is provided with a plurality of nozzle openings which are distributed at intervals; the adjusting screw comprises a bolt and a nut, the bolt is connected with the nut after being inserted into the adjusting screw fixing hole of the injection cavity, the bottom end of the bolt is connected with the adjusting screw fixing hole of the fixing block, and the spring is sleeved at the bottom of the bolt;
the bottom of first air cavity and the bottom of second air cavity are formed with first wave portion and second wave portion respectively, under the assembled state, first wave portion and second wave portion stagger the setting.
2. An exhaust valve for a vacuum die casting mold having a self-cleaning mechanism as claimed in claim 1, wherein: the second mounting position is further provided with a mounting plate, the mounting plate is fixedly connected with the second valve plate, the second mounting position is provided with a second limiting groove, the middle of the bottom end surface of the mounting plate downwards extends to form a second limiting strip, and the second limiting strip is inserted into the second limiting groove in an assembling state.
3. An exhaust valve for a vacuum die casting mold having a self-cleaning mechanism according to claim 2, characterized in that: the bottom end face of the second valve plate and the top end face of the mounting plate are both provided with a plurality of buffer grooves, and buffer springs are arranged in the buffer grooves of the mounting plate.
4. An exhaust valve for a vacuum die casting mold having a self-cleaning mechanism as claimed in claim 1, wherein: the first mounting position is provided with a first limit groove, a first limit strip downwards extends from the middle of the bottom end surface of the first valve plate, and the first limit strip is inserted into the first limit groove in an assembly state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010124764.7A CN111271496B (en) | 2020-02-27 | 2020-02-27 | Exhaust valve with self-cleaning mechanism for vacuum die casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010124764.7A CN111271496B (en) | 2020-02-27 | 2020-02-27 | Exhaust valve with self-cleaning mechanism for vacuum die casting die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111271496A CN111271496A (en) | 2020-06-12 |
| CN111271496B true CN111271496B (en) | 2024-09-13 |
Family
ID=71000404
Family Applications (1)
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| US5203396A (en) * | 1992-04-27 | 1993-04-20 | Outboard Marine Corporation | Vacuum valve for die casting |
| SK287141B6 (en) * | 2006-05-25 | 2010-01-07 | Continental Matador Rubber, S. R. O. | Bleed valve for use in vent holes of vulcanization molds |
| CH705077B1 (en) * | 2011-06-09 | 2016-01-29 | V D S Vacuum Diecasting Service S A | Valve device for evacuation of air from a mold. |
| JP6562312B2 (en) * | 2016-11-04 | 2019-08-21 | Smc株式会社 | Dust removal device and dust removal system |
| CN207421622U (en) * | 2017-11-18 | 2018-05-29 | 任丘市满桥水暖器材有限公司 | A kind of air bleeding valve |
| CN110802211B (en) * | 2019-11-29 | 2022-01-04 | 东莞邦达五金有限公司 | Sealing structure of vacuum die-casting die |
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