CN114029470B - Die-casting die for explosion-proof gas detector and die-casting method thereof - Google Patents
Die-casting die for explosion-proof gas detector and die-casting method thereof Download PDFInfo
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- CN114029470B CN114029470B CN202111339213.3A CN202111339213A CN114029470B CN 114029470 B CN114029470 B CN 114029470B CN 202111339213 A CN202111339213 A CN 202111339213A CN 114029470 B CN114029470 B CN 114029470B
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- 238000004512 die casting Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002893 slag Substances 0.000 claims abstract description 104
- 238000005266 casting Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 70
- 230000003139 buffering effect Effects 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 78
- 239000013049 sediment Substances 0.000 description 25
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000003818 cinder Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002026 carminative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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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
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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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
- B22D17/20—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
- B22D17/2015—Means for forcing the molten metal into the die
-
- 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
- B22D17/2076—Cutting-off equipment for sprues or ingates
-
- 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
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Abstract
The application discloses a die-casting die for an explosion-proof gas detector and a die-casting method thereof, wherein the die-casting die comprises a casting pipe for inputting alloy solution, an upper die, a lower die and a slag ladle overflow mechanism for accommodating cold materials and bubbles; the bottom surface of the upper die can be attached to the top surface of the lower die to be closed, the upper die is provided with a cavity with a downward opening, the lower die is provided with a core which is convexly arranged on the top surface of the lower die, the cavity and the core can be closed to form a die cavity, and the slag ladle overflow mechanism is communicated with the die cavity; the casting pipe is positioned on the outer side of the mold cavity, a feeding runner is communicated between the casting pipe and the mold cavity, the slag ladle overflow discharge assembly comprises a first overflow discharge part and a second overflow discharge part, the first overflow discharge part is used for containing backflow cold burden and bubbles, the second overflow discharge part is used for containing head end cold burden, the first overflow discharge part is communicated with the mold cavity close to the feeding runner, and the second overflow discharge part is communicated with the mold cavity far away from the feeding runner. This application die mould can effectual promotion die casting's gas tightness.
Description
Technical Field
The application relates to the field of machining, in particular to an explosion-proof gas detector die-casting die and a die-casting method thereof.
Background
In order to ensure the use and safety performance of the explosion-proof detector, the shell of the explosion-proof detector is made of high-strength aluminum alloy materials; if the shell is machined by using the aluminum alloy blank, the shell is high in cost and long in machining time, in order to reduce cost and improve efficiency, the shell of the explosion-proof detector is usually machined by using an aluminum alloy die-casting die, and the shell of the explosion-proof detector has sealing and explosion-proof properties.
The product forms a cylindrical die casting through aluminum alloy die casting to be used as a part of a shell part of an explosion-proof detector, the die casting is of a cylindrical structure with a downward opening, and a corresponding die casting die is matched by a cylindrical core positioned below and a cylindrical die cavity positioned above, so that a cylindrical die cavity can be formed between the core and the die cavity through die casting.
In the process of casting and filling the aluminum alloy solution into a mold cavity of a mold at a low speed or at a high speed in a die casting process, but in the process of moving the solution from the mold cavity near a gate to a mold cavity far away from the gate, the mold cavity cannot be filled at one time because the mold cavity is cylindrical and the side wall has a certain height, but the aluminum alloy solution flows back after reaching the mold cavity far away from the gate under the continuous injection of the aluminum alloy solution, so that the whole mold cavity is filled.
Because the aluminum alloy solution contacts with the air in the die cavity, the solution entering the die cavity at first is rapidly cooled and oxidized after contacting with the air to form a head end cold charge, and the quality of the formed die casting is seriously influenced; and the backflow solution and the downstream solution generate vortex, bubbles are generated and backflow cold materials are generated, the bubbles and the backflow cold materials have the problem that the local range of the die casting is not sealed with high probability, so that the product with the airtight requirement is difficult to guarantee to be reliable, and the performance requirement of the explosion-proof detector cannot be met.
Therefore, a die-casting die is needed to produce the aluminum alloy die-casting piece capable of meeting the requirement of the shell airtightness of the explosion-proof detector of the product.
Disclosure of Invention
The problem that the air tightness of an aluminum alloy die casting in the prior art is poor is solved.
The application provides an explosion-proof gas detector die-casting die and a die-casting method thereof.
In a first aspect, the application provides an explosion-proof gas detector die casting die adopts following scheme:
a die-casting die for an explosion-proof gas detector comprises a casting pipe for inputting alloy solution, an upper die, a lower die and a slag ladle overflow mechanism for accommodating cold materials and bubbles; the bottom surface of the upper die can be attached to the top surface of the lower die to be closed, the upper die is provided with a cavity with a downward opening, the lower die is provided with a core which is convexly arranged on the top surface of the lower die, the cavity and the core can be closed to form a die cavity, and the slag ladle overflow mechanism is communicated with the die cavity; the casting pipe is positioned on the outer side of the die cavity, a feeding runner is communicated between the casting pipe and the die cavity, the slag ladle overflow discharge assembly comprises a first overflow discharge part and a second overflow discharge part, the first overflow discharge part is used for containing backflow cold burden and bubbles, the second overflow discharge part is used for containing head end cold burden, the first overflow discharge part is communicated with the die cavity close to the feeding runner, and the second overflow discharge part is communicated with the die cavity far away from the feeding runner.
By adopting the scheme, the influence of cold burden and bubbles in the die-casting process is effectively reduced by arranging the slag ladle overflow mechanism; in actual production working conditions, the aluminum alloy solution which enters the high temperature at first is usually mixed with air in a die cavity, and cold materials are formed due to temperature reduction, so that the quality of die castings is seriously influenced due to the existence of the cold materials and oxides; in addition, the aluminum alloy solution cannot fill the mold cavity at one time along the flowing direction, and in the case of continuous injection of the solution, the initially entering solution flows back after reaching the mold cavity far away from the feeding runner. Therefore, the traditional die-casting die is easy to collect the reflowed cold material and the reflowed oxidation slag in the die cavity close to the feeding runner, and the reflowed aluminum alloy solution is easy to rewind to generate bubbles, so that the formed die-casting piece has bubbles, the air tightness is poor, and the requirement on the air tightness performance of an explosion-proof detector is difficult to meet. According to the technical scheme, the slag ladle overflow mechanism is arranged, the second overflow part is communicated with the die cavity far away from the feeding runner, and the first-end cold burden generated in the die cavity at first moves towards the direction far away from the feeding runner under the condition of continuous injection and is contained in the second overflow part, so that the influence of the oxidation slag and the cold burden on the mechanical property of the die casting is effectively reduced; on the other hand, bubbles and cold burden that the high temperature aluminum alloy solution of backward flow produced near the feeding runner are held by first excessive piece to the effectual bubble that has reduced in the die cavity has promoted the gas tightness performance of die casting effectively.
Optionally, the first overflow element includes a first slag ladle, and the first slag ladle is concavely disposed in the lower die; the aluminum alloy slag ladle is characterized by further comprising a feeding runner for inputting an aluminum alloy solution, wherein an overflow port for easily producing cold materials and bubbles through backflow is formed in a die cavity on one side of the feeding runner, and the first slag ladle is communicated with the overflow port.
Through adopting above-mentioned scheme, it has first cinder ladle to communicate through the die cavity on feeding runner one side to the row that carries out cold charge and bubble is excessive. In the traditional technical scheme, in order to realize the containing and removing of cold charge, a slag ladle is usually directly communicated with an inner sprue of a casting pipe and is connected with a mold cavity, so that oxidation slag and cold charge generated by the contact of an aluminum alloy solution at the foremost end and air can be contained. However, the slag ladle can be directly filled by the traditional technical means when the aluminum alloy solution enters, and the slag ladle cannot accommodate cold charge and bubbles which flow back subsequently. In the technical scheme, the slag ladle is not directly connected with the casting pipe and is not directly connected with the feeding runner; among this application technical scheme, the aluminum alloy solution that high temperature aluminum alloy solution flowed in from the feed runner can not directly get into first cinder ladle, and the aluminum alloy solution of high pressure injection produces the backward flow after reaching the die cavity and keeping away from the one end of feed runner to produce a large amount of bubbles and backward flow cold burden in one side of feed runner, carry the solution of a large amount of bubbles and cold burden and take the advantage of the situation and get into first cinder ladle this moment, further promoted the gas tightness of explosion-proof detector shell.
Optionally, the first overflow element further comprises a first overflow channel installed between the first slag ladle and the overflow port, the first overflow channel is inclined downward from the overflow port to the first slag ladle, and a position of the first overflow channel, where a connection position on the first slag ladle is lower than a position of a half of the depth of the first slag ladle.
By adopting the scheme, the first overflow channel is arranged between the overflow port and the first slag ladle, and the first overflow channel is inclined to the position of the first slag ladle, so that the overflow channel and the overflow port can be effectively prevented from being blocked by the aluminum alloy solution too early; in the traditional technical scheme, because alloy solution can solidify gradually along with the reduction of temperature at the flow in-process, consequently even if be provided with the sediment package, also appear in the in-process that solution flowed into the sediment package easily, still not fill up the sediment package and just solidify the problem of jam with the overflow for it is relatively poor to discharge the excessive effect. In the technical scheme, the overflow channel is obliquely and downwards arranged from the overflow port to the first slag ladle, and the low-position end of the overflow channel is lower than half of the depth of the first slag ladle, so that molten metal can be directly sprayed to a deep cavity of the overflow channel; meanwhile, the overflow channel is deeper, the resistance of liquid discharge is reduced, and the stability of the aluminum alloy solution entering is further ensured; and the design of tilting can also increase the intensity of overflow, and when ejecting the foundry goods, the cinder ladle is unlikely to automatic disconnection from the overflow.
Optionally, the feeding runner is concavely arranged in the lower die, and a connecting part of the feeding runner and the die cavity is provided with a guide surface inclining upwards.
Through adopting above-mentioned scheme, the slope of feeding runner and die cavity junction upwards, on the one hand, the in-process that aluminum alloy solution received pressure and dashed into the die cavity, if directly dash into the die cavity, direct impact core, the impact force turns into heat energy, not only the temperature of alloy liquid can rise, the mould temperature at impacted position also can rise a lot, the affinity that has increased aluminum alloy liquid and mould steel widely so that the phenomenon of sticking appears easily, the affinity of the aluminum alloy liquid at impacted position and mould steel increases, take place the melting easily, weld the adhesion. When a casting is demoulded at a part of the die, which is adhered with the die-casting alloy, the surface of the cavity and the surface of the casting are squeezed, pulled and torn, the skin layer of the casting is torn, and the surface of the casting is stuck and pulled, so that the quality of the die-casting is influenced; on the other hand, the ascending guide surface of slope can play the effect with the direction to the flow direction of aluminum alloy solution for aluminum alloy solution of high-speed operation is to keeping away from the direction motion of last mould, can directly not get into first cinder ladle, thereby has guaranteed that first cinder ladle can leave sufficient space and hold the backward flow aluminum alloy solution that carries a large amount of bubbles and cold burden.
Optionally, the second overflow part comprises a second slag ladle concavely arranged on the lower die and a second overflow channel, an inlet end of the second overflow channel is communicated with the die cavity at one end opposite to the feeding runner, and an outlet end of the second overflow channel is communicated with an inlet end of the second slag ladle.
Through adopting above-mentioned scheme, one side intercommunication relative with the feeding runner has the second sediment package in the die cavity, and the aluminum alloy solution flows behind the one end of keeping away from the feeding runner, and the gas volume fraction that its head end carried is higher, and has a large amount of oxidation sediment and cold burden, consequently among this application technical scheme, the aluminum alloy solution of head end can get into the second sediment package to keep the purity of die casting itself, and make the material compacter, the surface is more smooth. Further improving the air tightness and mechanical property of the die casting.
Optionally, the second overflow part further comprises a dirt collecting channel for accommodating cold materials, an inlet end of the dirt collecting channel is communicated with an outlet end of the second slag ladle, and an exhaust gap for exhausting gas in the mold cavity is formed in the other end of the dirt collecting channel.
Through adopting above-mentioned scheme, be provided with the dirty passageway of collection that is used for holding the cold burden, compare in traditional technical scheme simple accomodate and carminative design through album cinder ladle, among the application technical scheme, with the exit end of cinder ladle and connect on the entry end of the dirty passageway of collection, and then can hold more aluminum alloy solution, and because the existence of album dirty passageway, can flow longer distance behind the aluminum alloy solution outflow die cavity of head end, a buffering effect has been played, when gaseous in the discharge die cavity, make the aluminum alloy solution in the second discharge overflow spare can obtain effectual cooling solidification, avoid the aluminum alloy solution of high-speed motion to fly out from the exhaust space effectively, cause the incident.
Optionally, the die casting die further comprises a top die holder and a bottom die holder, the upper die is installed in the top die holder, the lower die is installed in the bottom die holder, the dirt collecting channel is formed by enclosing a first buffering part protruding in the shape of a wave and a second buffering part protruding in the shape of a wave and concavely arranged in the bottom die holder, and the first buffering part is engaged with the second buffering part to form the dirt collecting channel.
Through adopting above-mentioned scheme, the setting of first buffer portion and the meshing of second buffer portion to form the dirty passageway of collection, the setting of meshing has all played the buffering effect of preferred to the gas of high-speed motion and solution, and, under the dirty passageway length of collection certain circumstances, make the stroke of solution in the dirty passageway of collection promote greatly, make solution have enough time to cool off and solidify in the dirty passageway of collection, can further prevent the problem that high temperature aluminum alloy solution rushes out the dirty passageway of collection and causes the incident from appearing discharging.
Optionally, a third slag ladle is concavely arranged on one side, far away from the feeding runner, of the top surface of the mold core, and the third slag ladle is communicated with the mold cavity on the top surface of the mold core.
Through adopting above-mentioned scheme, be provided with the third sediment package at the core top surface, cold burden and oxidation slag in can further holding the aluminum alloy solution of following current promote the purity of product. The utility model provides an explosion-proof detector shell of die casting product for having the take the altitude, the aluminum alloy solution of following current is after reaching the die cavity of keeping away from feeding runner one end, and the volume fraction of carrying gas at the aluminum alloy solution of this department is very big to have a large amount of oxidizing slag and cold burden, and the second sediment package of concave establishing on the lower mould can hold the solution of product bottom. Therefore, the third slag ladle on the top surface of the mold core can effectively accommodate cold charge and air bubble in the mold cavity of the top surface of the mold core, and the purity and the performance of the product are further improved.
Optionally, a plurality of ejector rods are slidably connected to the lower die, a driving plate for driving the ejector rods to ascend and descend is installed on the base die seat in a liftable manner, the plurality of ejector rods are connected to one driving plate, and all the ejector rods can move simultaneously to eject a die casting.
Through adopting above-mentioned scheme, many ejector pins can be along with drive plate synchronous motion, have guaranteed the stability of die casting atress. The drive plate can slide on the die block seat, and many ejector pins are connected simultaneously on a drive plate, from this, need be with the ejecting in-process of die casting after the die sinking, a plurality of ejector pins can rise simultaneously in order to the die casting application of force, the effectual stability of guaranteeing the die casting atress for the die casting surface can not appear the fracture because local atress is too big, has further ensured the gas tightness of product.
In a second aspect, the die-casting method based on the die-casting die for the explosion-proof gas detector adopts the following technical scheme:
s1: the top die base moves towards the bottom die base to drive the die cavity and the die core to be matched to form a die cavity;
s2: injecting high-temperature aluminum alloy solution into the die cavity, and keeping the pressure until the aluminum alloy solution is solidified to form a die casting;
s3: opening the die and driving all the ejector rods to synchronously eject the die casting through the driving plate;
s4: and cutting off the first slag ladle, the second slag ladle and the third slag ladle on the die casting.
By adopting the scheme, the method firstly forms the die cavity through the die cavity and the die core, then injects the high-temperature aluminum alloy solution into the die cavity and keeps the pressure, so that the phenomenon that the molten metal loses pressure and flows back before being solidified to generate flow marks and air holes is prevented, and the die cavity can be filled with the aluminum alloy solution under the stable pressure; after the die is opened, the die casting is ejected out synchronously through all the ejector rods, so that local cracks and deformation of the die casting caused by the independent movement of local ejector rods are effectively prevented. Because in this application technical scheme, cold burden, oxidation sediment and bubble have been held through first sediment package, second sediment package and third sediment package, consequently in this die-casting method, with first sediment package, second sediment package and the excision of third sediment package on the die casting to obtain the die casting that the bubble content is less, the effectual gas tightness that promotes the die casting.
To sum up, the present application includes at least the following beneficial technical effects:
1. the slag ladle overflow discharging mechanism is arranged, so that the influence of cold burden and bubbles in the die-casting process is effectively reduced; in actual production working conditions, the aluminum alloy solution which enters the high temperature at first is usually mixed with air in a die cavity, and cold materials are formed due to temperature reduction, so that the quality of die castings is seriously influenced due to the existence of the cold materials and oxides; in addition, the aluminum alloy solution cannot fill the mold cavity at one time along the flowing direction, and in the case of continuous injection of the solution, the initially entering solution flows back after reaching the mold cavity far away from the feeding runner. Therefore, the traditional die-casting die is easy to collect the reflowed cold material and the reflowed oxidation slag in the die cavity close to the feeding runner, and the reflowed aluminum alloy solution is easy to rewind to generate bubbles, so that the formed die-casting piece has bubbles, the air tightness is poor, and the requirement on the air tightness performance of an explosion-proof detector is difficult to meet. According to the technical scheme, the slag ladle overflow mechanism is arranged, the second overflow part is communicated with the die cavity far away from the feeding runner, and the first-end cold burden generated in the die cavity at first moves towards the direction far away from the feeding runner under the condition of continuous injection and is contained in the second overflow part, so that the influence of the oxidation slag and the cold burden on the mechanical property of the die casting is effectively reduced; on the other hand, bubbles and cold charge generated by the reflowed high-temperature aluminum alloy solution near the feeding runner are accommodated by the first overflow part, so that the bubbles in the cavity are effectively reduced, and the air tightness of the die casting is effectively improved;
2. a first overflow channel is arranged between the overflow port and the first slag ladle, and the first overflow channel is inclined to the position of the first slag ladle, so that the overflow channel and the overflow port can be effectively prevented from being blocked by the aluminum alloy solution too early; in the traditional technical scheme, because alloy solution can solidify gradually along with the reduction of temperature at the flow in-process, consequently even if be provided with the sediment package, also appear in the in-process that solution flowed into the sediment package easily, still not fill up the sediment package and just solidify the problem of jam with the overflow for it is relatively poor to discharge the excessive effect. In the technical scheme, the overflow channel is obliquely and downwards arranged from the overflow port to the first slag ladle, and the low-position end of the overflow channel is lower than half of the depth of the first slag ladle, so that molten metal can be directly sprayed to a deep cavity of the overflow groove; meanwhile, the overflow channel is deeper, the liquid discharge resistance is reduced, and the stability of the aluminum alloy solution is further ensured; in addition, the inclined design can also increase the strength of the overflow channel, and the slag ladle cannot be automatically disconnected from the overflow channel when a casting is ejected;
3. the method comprises the steps of firstly forming a die cavity through a die cavity and a die core, then injecting high-temperature aluminum alloy solution into the die cavity and keeping pressure, so that the aluminum alloy solution is prevented from losing pressure and refluxing before being not solidified, flow marks and air holes are generated, and the die cavity can be filled with the aluminum alloy solution under the condition of stable pressure; after the die is opened, the die casting is ejected out synchronously through all the ejector rods, so that local cracks and deformation of the die casting caused by the independent movement of local ejector rods are effectively prevented. Because in this application technical scheme, cold burden, oxidation sediment and bubble have been held through first sediment package, second sediment package and third sediment package, consequently in this die-casting method, with first sediment package, second sediment package and the excision of third sediment package on the die casting to obtain the die casting that the bubble content is less, the effectual gas tightness that promotes the die casting.
Drawings
FIG. 1 is an exploded view of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic view of an embodiment of the present application showing a runner structure on a lower mold and hiding a portion of the runner structure;
fig. 3 is a cross-sectional view of an embodiment of the present application.
Description of reference numerals:
1. an upper die; 11. a cavity; 12. a mold cavity;
2. a lower die; 21. a core; 211. a third slag ladle; 22. a feed runner; 221. a guide surface;
3. a slag ladle discharge and overflow mechanism; 31. a first spill piece; 311. a first slag ladle; 312. a first spillway; 313. an overflow port; 32. a second overflow drain; 321. a second slag ladle; 322. a second overflow; 323. a dirt collecting channel;
4. a casting tube;
5. a top die holder; 51. a first buffer section;
6. a bottom die holder; 61. a second buffer portion; 611. a sewage collecting tank; 62. a drive plate; 63. a top rod; 64. a flow distribution boss;
7. a chassis; 71. a guide post; 72. and (7) a supporting plate.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a die-casting die for an explosion-proof gas detector and a die-casting method thereof,
referring to fig. 1 and 2, an explosion-proof gas detector die-casting mold includes: the device comprises a bottom die holder 6, a lower die 2, a top die holder 5, an upper die 1, a casting pipe 4, a slag ladle overflow mechanism 3, an underframe 7 and a plurality of ejector rods 63 for ejecting a product; the lower die 2 is installed in a bottom die base 6, the bottom die base 6 is installed on an underframe 7, the upper die 1 is installed in a top die base 5, a cavity 11 is concavely arranged on the upper die 1, a core 21 is convexly arranged in the lower die 2, and the top die base 5 can move towards the bottom die base 6 to be matched with the die to form a die cavity 12. The slag ladle overflow mechanism 3 is communicated with the die cavity 12, and the casting pipe 4 is positioned outside the die cavity 12.
Four guide posts 71 are arranged on the bottom die base 7, correspondingly, four guide holes are formed in the bottom die base 6, the guide posts 71 are in one-to-one corresponding insertion connection with the guide holes, so that the bottom die base 6 can be detachably mounted on the bottom die base 7, and the bottom die base 6 is convenient to detach and replace the die-casting die through the matching relation between the guide posts 71 and the guide holes.
The bottom frame 7 is further provided with a supporting plate 72, the supporting plate 72 supports a driving plate 62 for mounting the ejector rod 63, and the driving plate 62 is slidably mounted on the bottom die holder 6; specifically, four vertical guide rods are arranged on the bottom die holder 6, and the driving plate 62 is slidably mounted on the guide rods, so that the driving plate 62 can vertically slide and lift between the supporting plate 72 and the bottom surface of the bottom die holder 6, and the ejector rod 63 is driven to move up and down.
In order to accurately mold the top mold base 5 and the bottom mold base 6 during mold closing, four guide holes are formed in the top mold base 5, and the four guide holes are assembled corresponding to the four guide posts 71, so that the top mold base 5 can stably slide along the guide posts 71 during mold closing, and alignment between the top mold base 5 and the bottom mold base 6 is guaranteed. It should be noted that, in the embodiment of the present application, the guide pillar 71 is a stepped guide pillar 71, a portion above the guide pillar 71 for inserting the top die base 5 has a smaller shaft diameter, and the top die base 5 and the bottom die base 6 have a parting surface when being clamped, and the parting surface is flush with the stepped surface of the guide pillar 71.
The bottom die base 6 is internally provided with a mounting groove for mounting the lower die 2, the lower die 2 is embedded in the mounting groove, and the top surface of the lower die 2 is flush with the notch of the mounting groove; the lower die 2 is also provided with a core 21 in a protruding manner, in the embodiment of the present application, since the explosion-proof detector is approximately cylindrical, the core 21 is designed into a stepped cylinder shape;
correspondingly, the top die holder 5 is provided with a mounting groove for mounting the upper die 1, the upper die 1 is mounted in the mounting groove, and the lower end surface of the upper die 1 is flush with the notch of the mounting groove, so that the bottom surface of the upper die 1 can abut against the top surface of the lower die 2 at the parting surface along with the movement of the top die holder 5. The upper die 1 is concavely provided with a cavity 11 with a downward opening, and the cavity 11 can be matched with a core 21 to form a cavity 12 for molding a product; in the embodiment of the application, the cavity 11 is provided with a plurality of grooves to form the outer surface of the product die casting.
The top die holder 5 is provided with a casting tube 4 in a penetrating manner, the casting tube 4 is positioned outside the die cavity 12, the casting tube 4 is provided with an outer pouring gate positioned on the top surface of the top die holder 5 and an inner pouring gate positioned on the bottom surface of the top die holder 5, and the high-temperature aluminum alloy solution is injected into the outer pouring gate and flows to the interior of the die through the inner pouring gate. The cylindrical shunting boss 64 is arranged on the bottom die holder 6 corresponding to the inner pouring gate, one end of the inner pouring gate of the casting tube 4 is inserted into the shunting boss 64 during die assembly, and two sides of the shunting boss 64 are respectively connected with one feeding runner 22, so that the aluminum alloy solution can be shunted after passing through the casting tube 4. It is worth mentioning that in the embodiment of the present application, there are two cores 21 and two cavities 11, so that the shunting boss 64 plays a role of shunting, and can simultaneously mold two die casting products, and the efficiency is improved.
It should be noted that, for a single feeding channel 22, the end of the feeding channel 22 away from the flow dividing boss 64 branches into two middle channels and two side channels, in this embodiment, each feeding channel 22 branches into two middle channels and two side channels respectively located at two sides of the middle channel. And the side flow passages and the middle flow passage are both provided with flow passage bending parts for buffering the impact force of the aluminum alloy solution. The ends of the side runners and the middle runner remote from the ingate are both communicated with the mold cavity 12 so that the aluminum alloy solution can flow into the mold cavity 12.
The connecting parts of the side runners and the middle runner and the die cavity 12 are provided with guide surfaces 221 inclining upwards, and the aluminum alloy solution flows into the die cavity 12 and then moves upwards along the outer wall of the die core 21 to the die cavity 12 far away from the feeding runner 22; it is worth mentioning that the aluminum alloy solution entering the mold cavity 12 does not generally fill the mold cavity 12 at once, but flows back to gradually fill the mold cavity 12 after reaching the mold cavity 12 away from the feed runner 22; therefore, cold burden and bubbles are easily formed on the side of the side flow channels away from the middle flow channel, and thus this position is defined as the overflow port 313. In the present embodiment, the overflow port 313 is located near the junction of the side runner and the mold cavity 12, depending on the specific shape of the mold cavity 12.
The slag ladle overflow mechanism 3 is used for communicating with the mold cavity 12 to contain cold charge and bubbles, the slag ladle overflow mechanism 3 comprises a first overflow part 31 used for containing backflow cold charge and bubbles, the first overflow part 31 comprises a first slag ladle 311 and a first overflow channel 312, and the first slag ladle 311 is connected to an overflow port 313 through the first overflow channel 312 to contain the cold charge and bubbles generated by backflow at the overflow port 313. It is worth mentioning that the first overflow channel 312 is obliquely and downwards arranged from the overflow port 313 to the first slag ladle 311, the connecting part of the first overflow channel 312 on the first slag ladle 311 is lower than the position of the half of the depth of the first slag ladle 311, and the oblique and downwards arrangement enables the aluminum alloy solution to directly rush into the bottom of the first slag ladle 311, so that the aluminum alloy solution is effectively prevented from being condensed and blocked, and the accommodating effect is better.
The slag ladle overflow mechanism 3 further comprises a second overflow part 32 for accommodating the head end cold material, the head end cold material is generated due to the fastest solidification of the aluminum alloy solution initially entering the die cavity 12, and a large amount of oxidation slag can be generated with air, therefore, the second overflow part 32 comprises a second slag ladle 321 concavely arranged on the lower die 2 and a second overflow channel 322, the inlet end of the second overflow channel 322 is communicated with the die cavity 12 at one end opposite to the feeding runner 22, and the outlet end of the second overflow channel 322 is communicated with the inlet end of the second slag ladle 321, so that the head end cold material can enter the second slag ladle 321 along the same trend.
It is worth mentioning that in order to exhaust the air in the mold cavity 12 and better accommodate the first-end cold burden and the oxidized slag in the second slag ladle 321, a dirt collecting channel 323 is further provided, and an inlet end of the dirt collecting channel 323 is connected to an outlet end of the second slag ladle 321 to accommodate the air, the cold burden and the oxidized slag from the mold cavity 12; the other end of the dirty-collecting channel 323 has a vent gap for venting gas in the mold cavity 12, so that air in the mold cavity 12 can be vented from the vent gap. In the embodiment of the present application, the top die holder 5 is convexly provided with the first wavy buffer portion 51, the bottom die holder 6 is concavely provided with the second wavy buffer portion 61, and the first buffer portion 51 and the second buffer portion 61 can be engaged with each other in a staggered manner when the dies are closed, so as to form the dirt collecting channel 323. It should be mentioned that a plurality of dirt collecting grooves 611 are further formed in the wavy wave crest of the second buffer portion 61 to contain more aluminum alloy solution, so that the aluminum alloy solution cannot flow due to too tight meshing is prevented.
In order to further contain cold charge and air bubbles of the top cavity 11 of the core 21, a third slag ladle 211 is concavely arranged on the top surface of the core 21; in the embodiment of the present application, the top surface of the explosion-proof probe housing has an opening, so that the middle portion of the top core 21 does not form the cavity 12, and therefore the third slag ladle 211 is recessed in the middle of the top surface of the core 21 and communicates with the cavity 12 in the circumferential direction of the top surface of the core 21.
In order to eject the die casting after the die opening, a plurality of ejector rods 63 are slidably arranged in the lower die 2, specifically, an ejector rod 63 is vertically arranged on the bottom surface of each of the first slag ladle 311, the second slag ladle 321 and the third slag ladle 211 correspondingly, and the top end of each ejector rod 63 is flush with the bottom surface of the corresponding slag ladle. The bottom ends of all the push rods 63 are simultaneously fixed to the top surface of the drive plate 62, so that all the push rods 63 can push out the die cast by the lifting of the drive rod. It should be noted that in the embodiment of the present application, a plurality of ejector rods 63 are disposed at the projection of the mold cavity 12 on the lower mold 2, and the ejector rods 63 are also disposed at the bottom surface of each flow channel, so that all the ejector rods 63 can be synchronously driven to synchronously eject the die casting, the first slag ladle 311, the second slag ladle 321, the third slag ladle 211, and the dirt collecting channel 323 after the mold is opened. It should be noted that, in the embodiment of the present application, hydraulic air is further included for driving the top die base 5 to move toward the bottom die base 6 for closing the dies, which is not shown in the drawings; a driving motor for driving the driving plate 62 to move up and down is not shown in the drawings.
The implementation principle of the die-casting die and the die-casting method of the explosion-proof gas detector in the embodiment of the application is as follows: the top die holder 5 moves towards the bottom die holder 6 to bring the upper die 1 and the lower die 2 into clamping, so that the cavity 11 and the core 21 are clamped to form the cavity 12. The casting pipe 4 is filled with a high-temperature aluminum alloy solution, which flows through the cavity 12 and exhausts the gas in the cavity 12 through the second overflow 32. The cold charge and the oxidized slag at the head end of the solution are contained in the second slag ladle 321, the third slag ladle 211 and the sewage collecting channel 323, and the cold charge and the bubbles of the return solution are introduced into the first slag ladle 311. The solution is condensed and formed in the die cavity 12, then the die is opened, and all the ejector rods 63 are driven by the driving plate 62 to simultaneously ascend so as to eject the die casting.
The embodiment of the application also discloses a die casting method, which comprises the following steps:
s1: the top die base 5 moves towards the bottom die base 6 to drive the die cavity 11 and the die core 21 to be matched to form a die cavity 12;
s2: injecting high-temperature aluminum alloy solution into the die cavity 12, and keeping the pressure until the aluminum alloy solution is solidified to form a die casting;
s3: opening the die and driving all the ejector rods 63 to eject the die casting synchronously through the driving plate 62;
s4: and cutting off the first slag ladle 311, the second slag ladle 321 and the third slag ladle 211 on the die casting.
The embodiments of the present disclosure are all preferred embodiments of the present disclosure, and the protection scope of the present disclosure is not limited thereby, wherein like parts are designated by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides an explosion-proof gas detector die casting die which characterized in that: the device comprises a casting pipe (4) for inputting alloy solution, an upper die (1), a lower die (2) and a slag ladle overflow mechanism (3) for accommodating cold materials and bubbles; the bottom surface of the upper die (1) can be attached to the top surface of the lower die (2) to be closed, the upper die (1) is provided with a cavity (11) with a downward opening, the lower die (2) is provided with a core (21) which is convexly arranged on the top surface of the lower die (2), the cavity (11) and the core (21) can be closed to form a die cavity (12), and the slag ladle overflow discharge mechanism (3) is communicated with the die cavity (12); the casting pipe (4) is positioned at the outer side of the die cavity (12), a feeding runner (22) is communicated between the casting pipe (4) and the die cavity (12), the slag ladle overflow mechanism (3) comprises a first overflow part (31) for containing backflow cold burden and bubbles and a second overflow part (32) for containing head-end cold burden, the first overflow part (31) is communicated with the die cavity (12) close to the feeding runner (22), and the second overflow part (32) is communicated with the die cavity (12) far away from the feeding runner (22); the first overflow piece (31) comprises a first slag ladle (311), and the first slag ladle (311) is concavely arranged in the lower die (2); the aluminum alloy casting mold further comprises a feeding runner (22) used for inputting an aluminum alloy solution, an overflow port (313) which is easy to reflow and generate cold charge and bubbles is arranged on the mold cavity (12) on one side of the feeding runner (22), and the first slag ladle (311) is communicated with the overflow port (313); the first overflow piece (31) further comprises a first overflow channel (312) arranged between the first slag ladle (311) and the overflow port (313), the first overflow channel (312) is arranged from the overflow port (313) to the first slag ladle (311) in an inclined and downward mode, and the position, where the connecting position of the first overflow channel (312) on the first slag ladle (311) is lower than the position of half of the depth of the first slag ladle (311); the feeding runner (22) is concavely arranged in the lower die (2), and a connecting part of the feeding runner (22) and the die cavity (12) is provided with a guide surface (221) inclining upwards.
2. The die-casting mold for the explosion-proof gas detector as recited in claim 1, wherein: the second overflow part (32) comprises a second slag ladle (321) concavely arranged on the lower die (2) and a second overflow channel (322), the inlet end of the second overflow channel (322) is communicated with the die cavity (12) at one end opposite to the feeding flow channel (22), and the outlet end of the second overflow channel (322) is communicated with the inlet end of the second slag ladle (321).
3. The die-casting mold for the explosion-proof gas detector as recited in claim 2, wherein: the second overflow piece (32) further comprises a sewage collecting channel (323) for containing cold materials, the inlet end of the sewage collecting channel (323) is communicated with the outlet end of the second slag ladle (321), and the other end of the sewage collecting channel (323) is provided with an exhaust gap for exhausting gas in the mold cavity (12).
4. The die-casting mold for the explosion-proof gas detector as recited in claim 3, wherein: the die casting die further comprises a top die holder (5) and a bottom die holder (6), the upper die (1) is installed in the top die holder (5), the lower die (2) is installed in the bottom die holder (6), the dirt collecting channel (323) is formed by enclosing a first buffering part (51) which is convexly arranged on the top die holder (5) in a wave shape and a second buffering part (61) which is concavely arranged on the bottom die holder (6) in a wave shape, and the first buffering part (51) is meshed with the second buffering part (61) to form the dirt collecting channel (323).
5. The die-casting mold for the explosion-proof gas detector as recited in claim 1, wherein: and a third slag ladle (211) is concavely arranged on one side, far away from the feeding runner (22), of the top surface of the mold core (21), and the third slag ladle (211) is communicated with the mold cavity (12) on the top surface of the mold core (21).
6. The die-casting mold for the explosion-proof gas detector as recited in claim 4, wherein: a plurality of ejector rods (63) are connected in the lower die (2) in a sliding mode, a driving plate (62) used for driving the ejector rods (63) to lift is installed on the base die holder (6) in a lifting mode, the ejector rods (63) are connected to the driving plate (62), and all the ejector rods (63) can move simultaneously to eject die castings.
7. A die-casting method, characterized in that, the die-casting mold for explosion-proof gas detector according to any one of claims 1 to 6, the die-casting method comprises the steps of:
s1: the top die base (5) moves towards the bottom die base (6) to drive the die cavity (11) and the die core (21) to be matched to form a die cavity (12);
s2: injecting high-temperature aluminum alloy solution into the die cavity (12), and keeping the pressure until the aluminum alloy solution is solidified to form a die casting;
s3: opening the die and driving all the ejector rods (63) to eject the die casting synchronously through the driving plate (62);
s4: and cutting off a first slag ladle (311), a second slag ladle (321) and a third slag ladle (211) on the die casting.
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| CN202111339213.3A CN114029470B (en) | 2021-11-12 | 2021-11-12 | Die-casting die for explosion-proof gas detector and die-casting method thereof |
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| CN117564248B (en) * | 2024-01-16 | 2024-04-05 | 成都卫达机械制造有限公司 | Filling method for multi-way bulb tube integrated die-casting forming runner |
| CN117920973B (en) * | 2024-03-25 | 2024-06-04 | 宁波银润汽车部件有限公司 | Aluminum die casting die for multi-surface thin-wall deep cavity workpiece |
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Denomination of invention: A die-casting mold for explosion-proof gas detectors and its die-casting method Effective date of registration: 20231030 Granted publication date: 20230314 Pledgee: Societe Generale Bank Limited by Share Ltd. Shenzhen branch Pledgor: SHENZHEN HEIMAN TECHNOLOGY CO.,LTD. Registration number: Y2023980062979 |