CN115570119A - Vacuum casting equipment for pumping precise solution - Google Patents

Abstract

The utility model relates to a vacuum casting device for pumping precise solution, belonging to the technical field of vacuum casting, comprising a feeding cylinder arranged on the main body of the casting device, a mould module and a vacuum pumping component, wherein the mould module is provided with a casting cavity for accommodating casting raw materials, the feeding cylinder is provided with feeding holes penetrating through two ends of the feeding cylinder along the length direction thereof, one end of the feeding hole is provided with a material pushing rod in a sealing and sliding way, and the other end of the feeding hole is communicated with the casting cavity; the feeding cylinder is also hermetically provided with a feeding funnel communicated with the feeding hole, and the feeding funnel has a heat preservation function; the feeding cylinder is provided with a valve assembly which is used for controlling the communication between the feeding hopper and the feeding cylinder; the vacuumizing assembly is used for sucking air in the casting cavity. The feeding cylinder has the advantages that air cannot enter the feeding cylinder, and the effects of perfect filling of metal solution compactness and in a casting cavity can be achieved without pressure.

Description

Vacuum casting equipment for pumping precise solution

Technical Field

The application relates to the technical field of negative pressure casting, in particular to a negative pressure casting device for a pumped precise solution.

Background

The casting equipment is strictly speaking equipment which utilizes the technology to smelt metal into liquid meeting certain requirements and pour the liquid into a casting mold, and the metal solution is cooled, solidified and cleaned to obtain a metal casting with preset shape, size and performance. On the other hand, the casting-related machines can also be classified as casting machines, which are one of the basic processes of the modern machine manufacturing industry. The casting equipment is developed gradually in China as a metal hot working process. The casting equipment is generally classified according to the molding method, and is conventionally classified into ordinary sand casting equipment and special casting equipment. The common sand mold casting equipment comprises three types of equipment, namely green sand mold casting equipment, dry sand mold casting equipment and chemical hardening sand mold casting equipment. The special casting equipment can be divided into two categories according to different molding materials: natural mineral aggregate is used as a main molding material, such as investment casting equipment, shell casting equipment, negative pressure casting equipment, mud type casting equipment, full type casting equipment, ceramic type casting equipment and the like; one uses metal as the main casting material.

In the related art, a charging barrel for feeding the molten metal is arranged on a main body of the casting equipment, and in the feeding process, firstly, the molten metal in an external smelting furnace is spooned into the charging barrel, the molten metal can be directly poured into the charging barrel exposed in the air along with the air, and then the molten metal mixed with the air is injected into a mold cavity through violent impact. Because the metal solution is mixed with oil and air, and the air is injected into the die cavity together with the metal solution during pushing and high-speed filling, a large amount of air holes and loosening phenomena exist after the metal casting is formed; in addition, the pressure and the mold locking force required by filling are multiplied due to the resistance effect of the air in the mold cavity and the metal solution, and the multiplication of the pressure and the mold locking force cannot solve the problems of air holes and looseness, and inevitably leads to the instability of a pressure filling coefficient and the great shortening of the service life of the mold due to the early fatigue of the metal material.

Disclosure of Invention

In order to improve the technical problem existing in the technical scheme, the application provides a vacuum casting device for pumping precise solution.

The application provides a take out accurate solution negative pressure casting equipment violently, adopt following technical scheme:

a vacuum casting device for a pumped precise solution comprises a feeding cylinder, a mold module and a vacuum pumping assembly, wherein the feeding cylinder, the mold module and the vacuum pumping assembly are arranged on a main body of the casting device, the mold module is provided with a casting cavity for accommodating a casting raw material, the feeding cylinder is provided with feeding holes penetrating through two ends of the feeding cylinder along the length direction of the feeding cylinder, one end of each feeding hole is provided with a material pushing rod in a sealing and sliding mode, and the other end of each feeding hole is communicated with the casting cavity; the feeding cylinder is also hermetically provided with a feeding funnel communicated with the feeding hole, and the feeding funnel has a heat preservation function; the feeding cylinder is provided with a valve assembly, and the valve assembly is used for controlling the communication between the feeding hopper and the feeding cylinder; the vacuumizing assembly is used for sucking air in the casting cavity.

By adopting the technical scheme, when the metal solution needs to be fed, the valve assembly is driven to control the feeding cylinder to be in an isolated state with the outside so as to ensure that the whole feeding hole and the casting cavity are in a fully-closed state, and then the vacuumizing assembly is started to continuously pump air in the casting cavity and the feeding hole so that the whole feeding hole and the casting cavity are in a negative pressure state continuously; then the metal solution spoon is loaded into the feeding funnel, and the feeding funnel is kept in a high-temperature state continuously, so that the metal solution in the feeding funnel is not easy to cool and solidify, and the metal solution can be continuously added into the feeding cylinder; after the metal solution is poured into the feeding funnel, and when the negative pressure of the casting cavity reaches a proper index, the valve assembly is started, and the feeding funnel and the feeding cylinder are controlled to be in a communicated state, at the moment, the metal solution in the feeding funnel enters the feeding cylinder along with the siphon effect of the negative pressure of the feeding hole and the casting cavity, and then the whole casting cavity is instantly filled under the negative pressure of the casting cavity; in addition, at the moment when the metal solution quantitatively enters the feeding cylinder, the valve assembly controls the feeding cylinder to be in a closed state, air is isolated from entering the feeding cylinder, meanwhile, the material pushing rod is started, the material pushing rod pushes the metal solution remained in the feeding hole into the casting cavity by sliding in the feeding hole of the feeding cylinder, and due to the high-speed pushing of the material pushing rod, the metal solution has the function of generating pressurization in the process of completely entering the casting cavity, so that the metal solution in the casting cavity is further compacted, and the metal solution is filled and cast in the casting cavity in a dead-corner-free and high-density manner;

compared with the metal solution in the related technology, the metal solution is added into the charging barrel along with air, so that a large amount of air holes and loosening phenomena exist after a metal casting is formed, and the pressure filling coefficient is unstable and the service life of a die is greatly shortened due to the fact that the metal material is fatigued in advance due to air resistance; the method has the advantages that the process of supplying the metal solution to the casting cavity is in a closed state and is completely isolated from air, and the air cannot enter the feeding cylinder and cannot enter the casting cavity through the feeding cylinder, so that the prepared metal casting does not have a large number of air holes and loosening phenomena, and the production quality of the metal component is obviously improved;

in addition, in the related art, after the air mixed metal solution enters the charging barrel, air resistance is formed in the charging barrel, and the metal solution in the charging barrel is difficult to extrude into the casting cavity, so that forced die-casting filling is performed in a state that the charging barrel is full of air resistance, namely, a high-pressure high-speed filling mode is adopted, negative pressure flow assistance is lacked, direct cost, indirect cost and peripheral matching cost are inevitably and greatly increased under vicious circle, meanwhile, in the high-pressure high-speed filling mode, the metal solution in the charging barrel can be injected into the cavity at high speed, the cavity is formed by metal materials, and the metal solution injected under high speed and high pressure has high impact property, so that the metal material in the cavity is easily damaged, and the cost is increased; on the other hand, the high-pressure and high-speed filling mode is adopted, so that the pressure and the mold locking force required by filling are multiplied, and the multiplication of the pressure and the mold locking force cannot solve the problems of air holes and looseness, and inevitably causes the instability of a pressure filling coefficient and the great shortening of the service life of the mold due to the early fatigue of metal; in the application, the vacuum component is used for continuously sucking and pumping to ensure that the casting cavity and the feeding cylinder are continuously in a negative pressure state, the metal solution in the feeding funnel is filled in each corner of each space of the cavity in a clockwise manner by using the siphonage of the negative pressure, and the feeding cylinder and the casting cavity are not influenced by air resistance, so that the metal solution can be perfectly filled into the casting cavity without pressure; therefore, the non-violent flushing filling adopted by the method has no flash residue of the expansion die flash, so that the post-processing difficulty and the peripheral post-processing matching cost are greatly reduced;

in addition, in the conventional technology, the metal solution is generally filled into a cylinder, and the cylinder is externally arranged in the air, so the metal solution is cooled and solidified at a feed inlet of the cylinder to form a coating, and the coating affects the quality of a metal component; in the application, the feeding funnel has a heat preservation function, so that the metal solution in the feeding funnel cannot be cooled and solidified; in addition, the feeding funnel and the feeding cylinder are connected in a sealing manner, the metal solution in the feeding cylinder can be quickly sucked into the casting cavity by the negative pressure siphon effect, then the residual metal solution in the feeding cylinder is pushed into the casting cavity by the pushing rod, so that the metal solution is not easy to remain in the feeding cylinder, the feeding funnel is always in a heat preservation state, when the metal solution at the position, close to the opening, of the feeding funnel is cooled, the temperature reduced by the metal solution added subsequently can be increased again, the melting temperature of the metal solution is kept, and the metal solution is not easy to be cooled and solidified; metal component's production among the prior art, metal solution add to the feed cylinder in, in process of production, because metal solution's addition is by the capacity limited decision of feed cylinder, the feed cylinder tonnage scale is big, and in this application, at the in-process that lasts die-casting production metal component, feed hopper's capacity is big, and is in the heat preservation state, consequently makes continuous die-casting and shortens the die-casting cycle greatly, and can make the required die casting machine tonnage of cast forming certainly can reduce with hundreds of times or even thousand times career formula violently.

Optionally, the valve assembly comprises a connecting plate, a feeding valve block and a driving member, the connecting plate is arranged on the feeding cylinder, the feeding valve block is slidably arranged on one side of the connecting plate facing the feeding cylinder, and the feeding valve block is in sealed sliding connection with the feeding cylinder; the driving piece is arranged on the connecting plate and used for driving the feeding valve block to slide on the connecting plate; the connecting plate is provided with a through hole, and the feeding valve block is provided with a connecting hole corresponding to the through hole, so that the metal solution in the feeding funnel can enter the feeding cylinder through the through hole and the connecting hole in sequence.

Through adopting above-mentioned technical scheme, when needs bleed to feed port and casting die cavity, the driving piece starts, drive pan feeding valve block slides on the connecting plate, make through-hole on the connecting plate and the connecting hole on the pan feeding valve block not correspond, thereby make the feed cylinder be in encapsulated situation, then evacuation subassembly continues bleeding to casting die cavity and feed port again, make it be in the negative pressure state, then the driving piece drives the return of pan feeding valve block again, make through-hole on the connecting plate and the connecting hole intercommunication on the pan feeding valve block, thereby metal solution in the feed hopper enters into the feed cylinder through-hole and connecting hole, in the twinkling of an eye when metal solution ration gets into the feed cylinder, as separating and hindering the air function in partial metal solution, when still not getting into the feed cylinder, the driving piece drives the pan feeding valve block and promptly to remove, make through-hole and connecting hole not correspond, isolated air invasion feed cylinder, simultaneously, pan feeding valve block and feed cylinder sealing slip are connected, air invasion has also been reduced in the feed cylinder.

Optionally, still be provided with on the connecting plate and drive actuating cylinder, it connects the involucra drift through the connection layer board transmission to drive actuating cylinder, the hole of sliding has been seted up on the connecting plate, the involucra drift slides and sets up in the hole of sliding, just the hole of sliding can correspond with the connecting hole, just the involucra drift is with the inside wall butt of connecting hole.

Through adopting above-mentioned technical scheme, when the metal solution flows through the connecting hole of pan feeding valve block, metal solution can remain on the lateral wall of connecting hole, when pan feeding valve block seals the feeding section of thick bamboo, connecting hole on the pan feeding valve block corresponds with the hole of sliding, remaining metal solution on the connecting hole inside wall cools off and solidifies and forms the involucra this moment, start and drive actuating cylinder, it slides in the hole of sliding to drive actuating cylinder through connecting the layer board drive involucra drift, and then the involucra drift can be got rid of the involucra on the connecting hole inside wall, the influence of involucra to metal member production quality has been reduced.

Optionally, a hot runner through which the molten metal can pass is further disposed in the connecting hole, and the membrane punch abuts against an inner side wall of the hot runner.

Through adopting above-mentioned technical scheme, through setting up the hot runner in the connecting hole, can reduce the erosion of metallic solution to the pan feeding valve piece, effectively improve the life of pan feeding valve piece.

Optionally, a punch guide seat is further arranged on the connecting plate, a guide hole communicated with the sliding hole is formed in the punch guide seat, and the leather membrane punch is arranged in the guide hole in a sliding manner.

Through adopting above-mentioned technical scheme, the involucra drift slides and sets up in the guiding hole to the drift guide holder, and the drift guide holder is effectual has improved the stability that the involucra drift slided to give involucra drift guide effect, make the involucra drift can be accurate get rid of the involucra in the hot runner.

Optionally, the material pushing rod comprises a hammer rod and a hammer head, one end of the hammer rod is connected with the hammer head, and the other end of the hammer rod is driven by a hydraulic cylinder; the hammer head is arranged in the feeding hole in a sealing and sliding mode, and the hammer head is abutted to the inner side wall of the feeding hole and used for pushing residual metal solution in the feeding hole into the casting cavity.

By adopting the technical scheme, after the metal solution is sucked to the casting cavity by negative pressure, some metal solution can remain in the feeding hole of the feeding cylinder, at the moment, the hydraulic cylinder drives the hammer rod to enable the hammer head to slide in the feeding hole at a high speed so as to be used for pushing the metal solution remaining in the feeding hole to the casting cavity, and due to the high-speed movement of the hammer head and the sealing sliding connection of the hammer head and the feeding hole, the pressurizing effect can be generated in the process that the metal solution remaining in the feeding hole completely enters the casting cavity, so that the metal solution is further filled in the casting cavity at high density;

compared with the prior art that the metal solution in the charging barrel is pushed into the die cavity in a high-pressure and high-speed filling mode, the metal solution is injected into the die cavity at a high speed, and the generated impact force is large, so that the die cavity is made of a material with high impact resistance, and the use of the die cavity material is limited; in addition, due to the strong resistance effect of air from the die cavity and the charging barrel, the service life of the hammer head and the charging barrel is greatly shortened along with the back-splash of the metal solution caused by the rapid abrasion of the hammer head, and the pressure becomes abnormal and fluctuated;

according to the method, the hydraulic cylinder is adopted to drive the hammer head to slide in the feeding hole at a high speed so as to push the residual metal solution into the casting cavity, and the high speed of the hammer head is far lower than that of the hammer head in the related technology, so that the residual metal solution cannot be rapidly injected into the casting cavity and damage the casting cavity, meanwhile, the hammer head is not easy to wear the feeding barrel, and the service lives of the hammer head and the feeding barrel are effectively prolonged; meanwhile, because the metal solution in the feeding cylinder is not injected into the casting cavity at high speed and high pressure, the casting cavity is not limited by materials which need to be strong in impact resistance, and high-temperature resistant materials can be adopted; the die cavity adopted at present is basically made of steel materials, the impact resistance is strong, but the high temperature resistance is poor, the die cavity is basically only suitable for being applied to single molten metal, and after the limitation of the material of the casting die cavity is removed, high temperature resistant materials such as ceramics and the like can be adopted, so that the die cavity can be simultaneously applied to copper die casting, zinc die casting and magnesium die casting in an overturned manner, and even the die cavity is applied to casting of high-melting-point metals such as iron, steel, titanium and the like.

Optionally, a plurality of sealing grooves are formed in the hammer head in the circumferential direction, sealing rings are arranged in the sealing grooves, and the sealing rings are abutted to the inner wall of the feeding hole.

Through adopting above-mentioned technical scheme, the setting of sealing washer, the effectual leakproofness that improves tup and feed port has further strengthened the full leakproofness of feed port and casting cavity, has reduced outside air's invasion.

Optionally, the vacuum pumping assembly is a piston type negative pressure pumping assembly.

By adopting the technical scheme, after the metal solution enters the feeding cylinder, the metal solution is instantaneously exploded and sucked under the action of the piston type negative pressure pumping assembly, so that the metal solution in the feeding cylinder can instantaneously and extremely quickly fill each corner of the whole casting cavity under the non-resistance negative pressure state of the feeding hole and the casting cavity; and this application adopts the mode of exploding to inhale to make metal solution fill to the casting die cavity fast in, and the impact nature that metal solution produced is very low, is difficult for producing the damage to the casting die cavity, has improved the life of casting die cavity, and on the other hand, owing to be the violence limit shaping of non-impact filling, except that metal casting compactness is even and cooling shrink is average, die joint and surface appearance also must be like the level and smooth identical of plastic injection moulding, have further improved the production quality of metal component.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the method has the advantages that the process of supplying the metal solution to the casting cavity is in a closed state and is completely isolated from air, and the air cannot enter the feeding cylinder and cannot enter the casting cavity through the feeding cylinder, so that the prepared metal casting does not have a large number of air holes and loosening phenomena, and the production quality of the metal component is obviously improved;

2. in the application, the vacuum assembly is used for continuously sucking and pumping, the metal melt in the feeding funnel is smoothly filled in each corner of each space of the die cavity by using the siphonage of negative pressure, and the metal melt can be perfectly filled into the casting die cavity without pressure; therefore, the non-violent flushing filling adopted by the method has no flash residue of the expansion die flash, so that the post-processing difficulty and the peripheral post-processing matching cost are greatly reduced;

3. the driving cylinder drives the membrane punch to slide in the sliding hole through the connecting supporting plate, so that the membrane punch can remove the membrane on the inner side wall of the connecting hole, and the influence of the membrane on the production quality of the metal member is reduced;

4. when the limitation of casting cavity materials is removed, high-temperature resistant materials such as ceramics and the like can be adopted, so that the casting die can be simultaneously suitable for copper die casting, zinc die casting and magnesium die casting in a flip manner, and even suitable for casting high-melting-point metals such as iron, steel, titanium and the like;

5. this application adopts the mode of exploding to inhale to make metal solution fill to casting die cavity fast in, and the impact nature that metal solution produced is very low, is difficult for producing the damage to casting die cavity, has improved the life in casting die cavity, and on the other hand, owing to be the violence limit shaping of non-dashing filling, except that metal casting compactness is even and cooling shrink is average, die joint and surface appearance must also be like the plastic is moulded plastics level and smooth anastomoses, have further improved metal component's production quality.

Drawings

FIG. 1 is a connection relationship between a feeding device and a casting device of a vacuum casting device for pumping a precise solution according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the feeding device of the vacuum casting apparatus for vacuum casting of a precision solution according to an embodiment of the present disclosure.

Fig. 3 is a partial exploded view of a feeding device of the vacuum casting apparatus for pumping precise solution to show the connection relationship between a feeding cylinder and a pushing rod.

Fig. 4 is a partial exploded view of a feeding device of the vacuum casting apparatus for drawing a precise solution to a negative pressure according to an embodiment of the present application, showing a connection relationship between a valve assembly and a feeding cylinder.

Fig. 5 is a schematic structural diagram of an overall connecting plate of the vacuum casting apparatus for pumped precision solution according to the embodiment of the present application.

Description of the reference numerals: 1. a feeding cylinder; 11. a feed port; 12. a feeding port; 13. a feed hopper; 131. mounting blocks; 1311. a first sealing ring strip; 14. a material pushing rod; 141. a hammer lever; 142. a hammer head; 1421. a sealing groove; 1422. a seal ring; 15. a chute; 16. a second mounting ring groove; 17. a second sealing ring strip; 18. connecting blocks; 2. a valve assembly; 21. a connecting plate; 211. mounting a plate; 212. a through hole; 213. a sliding hole; 214. a sliding groove; 22. feeding a valve block; 221. connecting holes; 222. a hot runner; 23. a drive member; 24. a driving cylinder; 25. mounting a bracket; 26. connecting the supporting plate; 27. a membrane punch; 28. a punch guide seat; 3. a mold module; 31. casting a cavity; 4. a vacuum pumping assembly; 5. and (7) fixing the plate.

Detailed Description

The present application is described in further detail below with reference to the attached drawing figures.

The embodiment of the application discloses a vacuum casting device for pumping precise solution. Referring to fig. 1 and 2, the solution negative pressure casting apparatus includes a feeding cylinder 1, a mold module 3, a vacuum pumping assembly 4 and a valve assembly 2 which are disposed on a casting apparatus main body, the mold module 3 includes an upper mold and a lower mold, a casting cavity 31 for accommodating a casting raw material is formed between the upper mold and the lower mold, and the casting raw material is a metal solution in the embodiment of the present application. In this application embodiment, the feeding cylinder 1 that adopts is long cylindrical structure, has seted up feed port 11 along its length direction in the feeding cylinder 1, and feed port 11 runs through in feeding cylinder 1 both ends to feed port 11 and casting die cavity 31 intercommunication. One end of the feeding cylinder 1, which is far away from the casting cavity 31, is connected with the material pushing rod 14 in a sliding manner, and the material pushing rod 14 is arranged in the feeding hole 11 in a sealing and sliding manner. Still be provided with feed hopper 13 on the feed cylinder 1, feed hopper 13 is used for holding metallic solution, in this application embodiment, is provided with heating pipe (not shown in the figure) in feed hopper 13 for feed hopper 13 has fine heat preservation function, and then makes the metallic solution in feed hopper 13 be in the molten condition always, and difficult cooling solidifies, and feed hopper 13 and feed port 11 intercommunication. The valve assembly 2 is arranged on the feeding cylinder 1 and used for controlling whether the feeding cylinder 1 is communicated with the feeding hopper 13. The vacuum-pumping assembly 4 is used to pump air out of the casting cavity 31, so that the casting cavity 31 and the feeding hole 11 are under negative pressure, so that the metal solution can enter the feeding cylinder 1 without accompanying air.

The vacuum pumping assembly 4 can be an assembly which drives a piston by fuel oil and causes air to expand to generate negative pressure instantly, and the vacuum assembly adopted in the embodiment of the application is a piston type negative pressure explosion pumping assembly. When the metal solution is required to be fed, the valve assembly 2 controls the feeding cylinder 1 to be isolated from the outside, so that the casting cavity 31 and the feeding hole 11 are in a fully-closed state, then the vacuumizing assembly 4 is started, air in the casting cavity 31 and the feeding hole 11 is continuously pumped, so that the casting cavity 31 and the feeding hole 11 are continuously in a negative pressure state, then the metal solution is spooned into the feeding hopper 13, and the valve assembly 2 controls the feeding cylinder 1 to be in a communication state with the feeding hopper 13. The metal solution is sucked into the feeding hole 11 by the siphon effect of the negative pressure, then the vacuum pumping assembly 4 generates the instant explosion effect, so that the metal solution can instantly and rapidly fill each corner of the whole casting cavity 31 in the negative pressure state, and then the material pushing rod 14 pushes the metal solution remained in the feeding cylinder 1 to the casting cavity 31 under the driving action of a hydraulic cylinder (not shown in the figure).

The casting equipment is provided with a fixing plate 5, the mould module 3 is arranged on one side of the fixing plate 5 through screws, the feeding cylinder 1 is arranged on the other side of the fixing plate 5, the feeding cylinder 1 penetrates through the fixing plate 5, and meanwhile, the feeding hole 11 is communicated with the casting cavity 31.

Referring to fig. 3, the lifter 14 includes a hammer rod 141 and a hammer head 142, and one end of the hammer rod 141 is threadedly coupled to an end of the hammer head 142. The tup 142 that adopts in this application is cylindrical structure, and tup 142 slides and sets up in feed port 11, and tup 142 and feed port 11's lateral wall butt simultaneously. The hammer head 142 is provided with a sealing groove 1421 along the circumferential direction thereof, the number of the sealing grooves 1421 may be plural, the number of the sealing grooves 1421 is four in the embodiment of the present application, and the four sealing grooves 1421 are parallel to each other. All bond in the seal groove 1421 and be provided with sealing washer 1422, sealing washer 1422 is formed by high temperature resistant rubber material preparation in this application, and sealing washer 1422 still with the inside wall butt of feed port 11, the effectual leakproofness that has improved between tup 142 and the feed port 11, reduced during outside air invades feed port 11.

Referring to fig. 4 and 5, the valve assembly 2 includes a driving member 23, a connecting plate 21 and a feeding valve block 22, the driving member 23 adopted in the present application is an oil pressure cylinder, and a piston rod of the driving member 23 is in threaded connection with the feeding valve block 22, so as to drive the feeding valve block 22 to slide on the connecting plate 21. In the embodiment of the present application, the connecting plate 21 is a rectangular parallelepiped plate-shaped structure, and both ends of the connecting plate 21 are connected with the mounting plates 211 through screws, and the mounting plates 211 are connected with the casting equipment through screws, and the driving member 23 is also connected with one of the mounting plates 211 through screws. The connecting plate 21 is located between the feeding cylinder 1 and the feeding funnel 13, a sliding groove 214 is formed in one side of the connecting plate 21 facing the feeding cylinder 1, and the feeding valve block 22 is slidably arranged in the sliding groove 214, so that the driving member 23 drives the feeding valve block 22 to slide on the connecting plate 21 in a reciprocating manner.

The feeding cylinder 1 is provided with a sliding groove 15, the feeding valve block 22 can slide in the sliding groove 15, the two sides of the sliding groove 15 are provided with connecting blocks 18 through screws, the connecting blocks 18 are connected with the connecting plate 21 through screws, and the feeding valve block 22 can slide between the two connecting blocks 18.

The feed hopper 13 has a mounting block 131, and the mounting block 131 has a feed opening (not shown). One side of the mounting block 131 facing the connecting plate 21 is provided with a first mounting ring groove (not shown in the figure), the first mounting ring groove is formed around the feed inlet, a first sealing ring strip 1311 is arranged in the first mounting ring groove in an adhering manner, and the first sealing ring strip 1311 is abutted against the connecting plate 21 to ensure the sealing property between the feed hopper 13 and the connecting plate 21. The middle part of the connecting plate 21 is provided with a through hole 212, and the through hole 212 is communicated with the feed inlet. A connecting hole 221 is also formed in the feeding valve block 22, a hot runner 222 is arranged on the feeding valve block 22 through a screw, and the hot runner 222 is located in the connecting hole 221.

Referring to fig. 3 and 4, a feeding port 12 is opened on the feeding cylinder 1, and the feeding port 12 is located on the bottom wall of the chute 15. Similarly, the inlet 12, the hot runner 222, the through hole 212 and the inlet are all connected. A second mounting ring groove 16 is formed in the bottom wall of the sliding groove 15 around the feeding port 12, a second sealing ring strip 17 is arranged in the second mounting ring groove 16 in a bonding mode, the second sealing ring strip 17 is abutted to the feeding valve block 22, and the tightness between the feeding valve block 22 and the feeding barrel 1 in the sliding process is guaranteed.

The valve assembly 2 further comprises a driving cylinder 24 and a membrane punch 27, wherein one mounting plate 211 is provided with a mounting bracket 25 through screws, and the driving cylinder 24 is provided on the mounting bracket 25 through screws. A connecting support plate 26 is screwed to the piston rod of the driving cylinder 24, and the connecting support plate 26 is screwed to the end of the membrane punch 27. The connecting plate 21 is further provided with a sliding hole 213, the connecting plate 21 is provided with a punch guide seat 28 through a screw, and the punch guide seat 28 is provided with a guide hole (not shown in the figure) which is communicated with the sliding hole 213.

In the embodiment of the present application, the film punch 27 has a rod-like structure, and one end of the film punch 27 is screwed to the connecting support plate 26, and the other end thereof passes through the guide hole of the punch guide seat 28 and is located in the slide hole 213. When the feed hole 11 of the feed cylinder 1 needs to be isolated from the outside, the driving unit 23 drives the feed valve block 22 to slide on the connecting plate 21, so that the hot runner 222 of the feed valve block 22 corresponds to the sliding hole 213, and at this time, the driving cylinder 24 is started to drive the film punch 27 to slide in the hot runner 222, so as to remove the film formed by cooling the residual metal solution on the inner wall of the hot runner 222.

The implementation principle of the vacuum casting equipment for pumping the precise solution violently in the embodiment of the application is as follows: when the metal solution needs to be loaded, firstly, the driving part 23 drives the feeding valve block 22 to slide on the connecting plate 21, so that the feeding valve block 22 seals the feeding port 12 on the feeding cylinder 1, the feeding cylinder 1 is isolated from the outside, the whole feeding hole 11 and the casting cavity 31 are ensured to be in a fully-closed state, and then the vacuumizing assembly 4 is started to continuously extract air in the casting cavity 31 and the feeding hole 11, so that the whole feeding hole 11 and the casting cavity 31 are continuously in a negative pressure state; then, the metal solution spoon is filled into the feeding funnel 13, and the feeding funnel 13 is kept in a high-temperature state continuously, so that the metal solution in the feeding funnel 13 is not easy to cool and solidify, and the metal solution can be continuously added into the feeding cylinder 1; after the metal solution is poured into the feeding funnel 13, when the negative pressure of the casting cavity 31 reaches a proper index, the driving part 23 is started to drive the hot runner 222 of the feeding valve block 22 to be correspondingly communicated with the feeding hole of the feeding funnel 13, so that the feeding funnel 13 and the feeding barrel 1 are in a communicated state, at the moment, the metal solution in the feeding funnel 13 enters the feeding barrel 1 along with the siphon effect of the negative pressure, and then is instantaneously exploded and sucked under the action of the piston type negative pressure explosion and suction assembly, so that the metal solution in the feeding barrel 1 instantaneously fills each corner of the whole casting cavity 31 at an extremely high speed under the negative pressure state without resistance of the feeding hole 11 and the casting cavity 31;

in addition, at the moment when the metal solution quantitatively enters the feeding cylinder 1, the driving piece 23 drives the feeding valve block 22 to seal the feeding port 12 of the feeding cylinder 1, and air is isolated from entering the feeding cylinder 1; meanwhile, the hammer rod 141 is started by the hydraulic cylinder, the hammer rod 141 drives the hammer head 142 to slide in the feed hole 11 of the feed cylinder 1 to push the residual metal solution in the feed hole 11 into the casting cavity 31, and due to the high-speed pushing of the hammer head 142, the metal solution has the function of generating pressurization in the process of completely entering the casting cavity 31, so that the metal solution in the casting cavity 31 is further compacted, and the metal solution is filled in the casting cavity 31 with no dead angle and high compactness; after casting is finished, the vacuumizing assembly 4 controls air to enter the casting cavity 31 to eliminate the negative pressure state, and then the mold module 3 is instructed to be opened to finish a casting period for forming a metal casting;

when the inlet valve block 22 closes the inlet 12 of the inlet cylinder 1, the hot runner 222 on the inlet valve block 22 corresponds to the sliding hole 213 on the connecting plate 21, and the driving cylinder 24 drives the membrane punch 27 to slide back and forth in the hot runner 222, so as to remove the membrane on the inner wall of the hot runner 222.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: 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 (8)

1. The utility model provides a sudden and violent accurate solution negative pressure casting equipment that takes out which characterized in that: the casting device comprises a feeding cylinder (1) arranged on a casting device main body, a mould module (3) and a vacuumizing assembly (4), wherein the mould module (3) is provided with a casting cavity (31) used for accommodating casting raw materials, the feeding cylinder (1) is provided with feeding holes (11) penetrating through two ends of the feeding cylinder (1) along the length direction of the feeding cylinder, one end of each feeding hole (11) is provided with a material pushing rod (14) in a sealing and sliding mode, and the other end of each feeding hole (11) is communicated with the casting cavity (31); the feeding cylinder (1) is also hermetically provided with a feeding funnel (13) communicated with the feeding hole (11), and the feeding funnel (13) has a heat preservation function; the feeding cylinder (1) is provided with a valve assembly (2), and the valve assembly (2) is used for controlling the communication between the feeding hopper (13) and the feeding cylinder (1); the vacuum-pumping assembly (4) is used for pumping air in the casting cavity (31).

2. The pumped precision negative solution pressure casting apparatus of claim 1, wherein: the valve component (2) comprises a connecting plate (21), a feeding valve block (22) and a driving piece (23), the connecting plate (21) is arranged on the feeding cylinder (1), the feeding valve block (22) is arranged on one side, facing the feeding cylinder (1), of the connecting plate (21) in a sliding mode, and the feeding valve block (22) is connected with the feeding cylinder (1) in a sealing and sliding mode; the driving piece (23) is arranged on the connecting plate (21) and used for driving the feeding valve block (22) to slide on the connecting plate (21); a through hole (212) is formed in the connecting plate (21), and a connecting hole (221) is formed in the feeding valve block (22) corresponding to the through hole (212) so that metal solution in the feeding hopper (13) can enter the feeding cylinder (1) through the through hole (212) and the connecting hole (221) in sequence.

3. The pumped precision negative solution pressure casting apparatus of claim 2, wherein: still be provided with on connecting plate (21) and drive actuating cylinder (24), it connects involucra drift (27) to drive actuating cylinder (24) through connecting layer board (26) transmission, slip hole (213) have been seted up on connecting plate (21), involucra drift (27) slide and set up in slip hole (213), just slip hole (213) can correspond with connecting hole (221), just involucra drift (27) and the inside wall butt of connecting hole (221).

4. The pumped precision negative solution pressure casting apparatus of claim 3, wherein: the connecting hole (221) is also provided with a hot runner (222) for allowing the molten metal to pass through, and the film punch (27) is in contact with the inner side wall of the hot runner (222).

5. The pumped precision solution negative pressure casting apparatus of claim 3, wherein: the connecting plate (21) is further provided with a punch guide seat (28), the punch guide seat (28) is provided with a guide hole communicated with the sliding hole (213), and the membrane punch (27) is arranged in the guide hole in a sliding mode.

6. The pumped precision negative solution pressure casting apparatus of claim 1, wherein: the material pushing rod (14) comprises a hammer rod (141) and a hammer head (142), one end of the hammer rod (141) is connected with the hammer head (142), and the other end of the hammer rod is driven by a hydraulic cylinder; the hammer head (142) is arranged in the feed hole (11) in a sealing and sliding mode, and the hammer head (142) is abutted to the inner side wall of the feed hole (11) and used for pushing residual metal solution in the feed hole (11) into the casting cavity (31).

7. The pumped precision negative solution pressure casting apparatus of claim 6, wherein: the utility model discloses a hammer head, including tup (142), all be provided with sealing washer (1422) in the sealing groove (1421), sealing washer (1422) and the inner wall butt of feed port (11) have been seted up along its circumference on tup (142) a plurality of seal groove (1421), all be provided with sealing washer (1422) in the seal groove (1421).

8. The pumped precision negative solution pressure casting apparatus of claim 1, wherein: the vacuum pumping assembly (4) is a piston type negative pressure explosion pumping assembly.

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