CN114042864A - Precoated sand casting mold - Google Patents
Precoated sand casting mold Download PDFInfo
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- CN114042864A CN114042864A CN202111266272.2A CN202111266272A CN114042864A CN 114042864 A CN114042864 A CN 114042864A CN 202111266272 A CN202111266272 A CN 202111266272A CN 114042864 A CN114042864 A CN 114042864A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
- B22C23/02—Devices for coating moulds or cores
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
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Abstract
The invention relates to the technical field of precoated sand molds, in particular to a precoated sand casting mold, which comprises an upper mold and a lower mold, wherein the top wall of the upper mold is provided with an exhaust hole, the bottom wall of the upper mold is vertically provided with an insertion hole, the bottom wall of the lower mold is provided with a feed inlet, the lower mold is provided with a first cavity, the side wall of the first cavity is provided with an air hole extending out of the lower mold, and a fixing plate is horizontally arranged in the first cavity. According to the anti-sticking oil sprayer, the first baffle plate is driven to move under the combined action of the second spring and the first building block, so that the round hole formed in the first baffle plate moves to the junction of the rotary sprayer and the guide pipe, anti-sticking oil can enter the rotary sprayer from the guide pipe, meanwhile, the first piston plate continues to move downwards, the second piston plate does not move any more, and therefore when the anti-sticking oil is sprayed out of the rotary sprayer, the rotary sprayer is pushed to rotate, and the anti-sticking oil can be sprayed onto the side wall of the lower die cavity.
Description
Technical Field
The invention relates to the technical field of precoated sand molds, in particular to a precoated sand casting mold.
Background
And (3) coating sand, wherein the surface of sand grains is coated with a layer of molding sand or core sand of a solid resin film before molding. There are two film-coating processes of cold method and hot method: dissolving the resin with ethanol by a cold method, adding urotropine in the sand mixing process to coat the urotropine and the sand on the surface of sand grains, and volatilizing the ethanol to obtain precoated sand; the heat method is to preheat the sand to a certain temperature, add resin to melt the sand, stir the sand to coat the resin on the surface of the sand, add urotropine water solution and lubricant, cool, crush and screen the sand to obtain the precoated sand. The method is used for steel castings and iron castings.
Through retrieval, the Chinese patent No. CN111036840A discloses a precoated sand mold for casting, which comprises a movable mold and a fixed mold; a first mold cavity and a positioning groove are formed in the lower end face of the movable mold, air outlets are symmetrically formed in the movable mold and communicated with the first mold cavity; the positioning groove is internally provided at the outer side of the cavity opening of the first mold cavity, a positioning hole is arranged in the positioning groove, and a fixed mold is arranged below the movable mold; a feeding channel is arranged in the middle of the bottom end face of the fixed mold and is communicated with the second mold cavity, and the upper end face of the fixed mold is provided with the second mold cavity and a strip-shaped block for positioning; through the cooperation between locating lever and the locating hole, realize the accurate positioning compound die between movable mould and the fixed mould, through the cooperation between locating lever and the oil storage chamber, realize that antiseized silicon oil in the oil storage intracavity flows into No. two die cavities.
Although the precoated sand mold for casting can change the attaching area between the solidified casting and the second mold cavity through the up-and-down movement of the push plate, thereby reducing the adhesive force between the casting and the second mold cavity and facilitating the demolding, the precoated sand mold still has the following defects:
1. in the process of injecting molten metal, the molten metal is heavy, the push plate is pushed upwards only by the expansion of the second air bag, the pushing force of the second air bag to the push plate is not necessarily large in pressure of the molten metal to the push plate, and the pressure plate can be pressed downwards to cause the phenomenon of irregular casting shape;
2. in the process of injecting the molten metal, the molten metal may flow into the oil storage cavity from the oil outlet, and the anti-sticking oil can only gradually spread to the surface of the second mold cavity through the oil outlet, so that the efficiency is low, and the anti-sticking oil cannot spread to the inner side wall of the second mold cavity, so that the adhesion between the side wall of the second mold cavity and the casting is still strong;
3. when the metal liquid is injected, the air bag expands to blow air into the air holes, only dust on the part of the air holes above the air bag is blown off, and in the process of solidification between the metal liquid, the air bag contracts and possibly sucks dust in the air into the air bag, so that the air bag is polluted.
To this end, a precoated sand casting mold is proposed.
Disclosure of Invention
The invention aims to provide a precoated sand casting mold to solve the problem that a push plate is pressed down by molten metal in the process of injecting the molten metal in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a precoated sand casting mold comprises an upper mold and a lower mold, wherein the top wall of the upper mold is provided with an exhaust hole, the bottom wall of the upper mold is vertically provided with a jack, the bottom wall of the lower mold is provided with a feed inlet, the lower mold is provided with a first cavity, the side wall of the first cavity is provided with an air hole extending out of the lower mold, a fixing plate is horizontally arranged in the first cavity, a first piston plate is movably arranged below the fixing plate in the first cavity, a fixing rod matched with the jack is vertically arranged on the top wall of the first piston plate, a stop block is arranged on the fixing rod, a first spring is sleeved on the part of the fixing rod, which is positioned between the stop block and the fixing plate, the lower mold is provided with an oil cavity communicated with the first cavity, a second piston plate is horizontally movably arranged in the oil cavity, a guide pipe extending to the bottom wall of the second piston plate is vertically arranged on the top wall of the second piston plate, the top end of the guide pipe is fixedly provided with an installation block, a first baffle is horizontally inserted into the side wall of the installation block, a round hole with the same size as the inner diameter of the guide pipe is formed in the first baffle, first building blocks are installed on two sides of the first baffle, which extend out of the installation block, one side of the installation block is horizontally provided with a second spring fixedly connected with the first building block, a rotary spray head is vertically and rotatably installed on the top wall of the installation block, a second baffle is installed on the rotary spray head, a groove is formed in the inner bottom wall of the lower die, a push plate is horizontally and movably arranged in the groove, and a driving mechanism for driving the push plate to move is arranged on the lower die;
the driving mechanism comprises a second cavity which is arranged on the lower die and communicated with the oil cavity, a third piston plate is arranged in the second cavity in a horizontal moving mode, a first push rod fixedly connected with the push plate is vertically arranged on the top wall of the third piston plate, and a dustproof mechanism is arranged on the upper die.
In the process of the upper die, the lower die and the die, the fixed rod gradually enters the jack, when the fixed rod reaches the top wall of the jack, die assembly is finished, at the moment, because the fixed rod can not move upwards any more, the fixed rod pushes the first piston plate movably arranged in the first cavity downwards, the first spring is extruded by the stop block moving downwards along with the fixed rod, the pressure in the first cavity is increased in the process of moving downwards of the first piston plate, because the oil cavity is communicated with the first cavity, the second piston plate movably arranged in the oil cavity moves upwards along the oil cavity, the third piston plate movably arranged in the second cavity communicated with the oil cavity also moves along the second cavity, so that the push plate is pushed upwards to keep the push plate flush with the die cavity of the lower die, meanwhile, the guide pipe, the mounting block arranged on the guide pipe and the rotary spray head move upwards, and before the rotary spray head extends out of the inner wall of the lower die, because the first baffle blocks the junction of the rotary spray head and the guide pipe, the rotary spray head does not start to spray oil, when the rotary nozzle extends out of the inner die cavity of the lower die, the second spring pushes the first block to enable the first block to drive the first baffle plate to slide along the mounting block, so that the round hole on the first baffle plate is positioned between the guide pipe and the rotary spray head, the function of communicating the rotary spray head and the guide pipe is achieved, at the moment, the second piston plate moves to the top end of the oil cavity, and the fixed rod continues to drive the first piston plate to move downwards, under the action of high pressure, the anti-sticking oil in the oil cavity is sprayed out from the rotary spray head, and under the action of reaction force, the rotary spray head starts to rotate, thereby playing the role of uniformly spraying the anti-sticking oil on the lower die cavity, after the molten metal is solidified, when the upper die is separated from the lower die, the push plate moves downwards along the groove, so that the contact area between the casting and the die cavity is reduced, and the effect of reducing the adhesive force between the casting and the die cavity gradually is achieved.
Preferably, dustproof mechanism includes the vertical trachea of installing on exhausting the hole, it is equipped with the dust guard that extends to outside the trachea to insert on the tracheal lateral wall, the dust guard is located one side outside the trachea and installs the second building block, horizontal installation has the third spring of being connected with the trachea on the lateral wall that the second building block is close to trachea one side, last mould has seted up the third cavity, the horizontal activity in the third cavity has set the mounting panel, vertically install first memory alloy on the diapire of mounting panel, the heat-conducting plate that extends to on the exhaust hole lateral wall is installed to first memory alloy's bottom, vertically install the second push rod of drive second building block on the roof of mounting panel.
In the process of pouring into the molten metal, the air in the die cavity is got rid of from the trachea, when the molten metal that pours into contacted with the heat-conducting plate, first memory alloy is heated and is stretched to upwards promote the mounting panel and shift up along the third cavity, and drive the second push rod and shift up, the second push rod upwards promotes the second building block, make the dust guard block up the trachea, prevent to lead to the pressure reduction in the exhaust port to cause the phenomenon of absorbing external dust and molten metal contact because of the temperature decline, the effect of preventing the foundry goods from being contaminated has been played.
Preferably, the conduit is horizontally provided with a linkage rod extending into the first cavity, and the side wall of the fixed rod is horizontally provided with a pressing plate driving the linkage rod to move downwards.
After the rotary spray head finishes spraying the anti-sticking oil, the fixed rod still moves downwards, and the pressing plate is driven to move downwards in the process of moving downwards of the fixed rod, so that the pressing plate pushes the linkage rod connected with the guide pipe downwards, and the effect of driving the rotary spray head to reset is achieved.
Preferably, the bottom wall of the push plate is vertically provided with a strip-shaped second memory alloy.
In the process of injecting the molten metal, the second memory alloy is heated and extended in a heat transfer mode, so that the push plate is pushed upwards, the effect of ensuring that the push plate can be always positioned on the surface of the die cavity of the lower die is achieved, and the effect of preventing the molten metal from exerting pressure on the push plate to cause the push plate to move downwards to cause the irregular shape of the casting is achieved.
Preferably, an oil pipe extending to the outer side wall of the lower die is horizontally and fixedly inserted into the bottom end of the side wall of the first cavity.
After the anti-sticking oil in the oil cavity is completely consumed, the anti-sticking oil is injected into the oil cavity by arranging an oil pipe which extends into the first cavity from the side wall of the lower die, so that the effect of quickly oiling is achieved.
Preferably, the top end of the air pipe is provided with a dust screen.
When depositing last mould and lower mould with the compound die state, the dust screen can prevent during the dust in the air gets into the die cavity, consequently need not to clear up the die cavity when needs use, uses convenient and fast more.
Compared with the prior art, the invention has the beneficial effects that:
1. in the process of the upper die, the lower die and the die, the fixing rod moves downwards to drive the first piston plate to move downwards, so that the pressure in the first cavity is increased, the second piston plate in the oil cavity communicated with the first cavity moves upwards to balance the pressure, and in the process of moving upwards of the second piston plate, the rotary spray head installed on the guide pipe can be driven to enter the lower die cavity to prepare for spraying anti-sticking oil.
2. The rotary nozzle stretches out the one-time of die cavity down, under the combined action of second spring and first building block, drive first baffle and remove, thereby make the round hole of seting up on the first baffle remove to the juncture of rotary nozzle and pipe, thereby make antiseized oil can enter into rotary nozzle from the pipe, and simultaneously, first piston plate continues to move down, second piston plate no longer removes, consequently, when antiseized oil is spout from rotary nozzle, promote rotary nozzle and rotate, thereby make antiseized oil spray down on the lateral wall of die cavity.
3. In the process that first piston plate moved down, the third piston plate moved up along the second cavity to upwards promote the push pedal, make the push pedal can with the diapire parallel and level of die cavity down, simultaneously, after pouring into the molten metal, first memory alloy is heated and is stretched, thereby plays the effect that upwards promotes the push pedal.
4. When the metal liquid contacts with the heat-conducting plate, the second memory alloy is heated and extends, so that the second push rod is driven to move upwards, the second push rod pushes the first building block simultaneously, the dust-proof plate moves towards the air pipe to plug the air pipe, and in the metal liquid cooling process, negative pressure in the air hole is caused due to temperature reduction, and the casting is polluted due to the fact that the casting is caused by the fact that the casting absorbs dust in the outside air on the surface of the casting.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of an upper die of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is a cross-sectional view of the lower die of the present invention;
FIG. 5 is an enlarged view of the invention at B;
FIG. 6 is an enlarged view of the invention at C;
FIG. 7 is a combination view of a rotary sprayer head and a second baffle plate according to the invention;
figure 8 is a combination view of a first dam and a first block of the present invention.
In the figure: 1. an upper die; 2. a lower die; 3. a feed inlet; 4. a first cavity; 5. a fixing plate; 6. a first piston plate; 7. fixing the rod; 8. a stopper; 9. a first spring; 10. an oil chamber; 11. a second piston plate; 12. a conduit; 13. mounting blocks; 14. a first baffle plate; 15. a first block; 16. a second spring; 17. rotating the spray head; 18. a second baffle; 19. pushing the plate; 20. a second cavity; 21. a third piston plate; 22. a first push rod; 23. an air tube; 24. a dust-proof plate; 25. a second block; 26. a third spring; 27. a third cavity; 28. mounting a plate; 29. a first memory alloy; 30. a heat conducting plate; 31. a second push rod; 32. a linkage rod; 33. pressing a plate; 34. a second memory alloy; 35. an oil pipe; 36. a dust screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 8, the present invention provides a precoated sand casting mold, which comprises the following technical solutions:
a precoated sand casting mold comprises an upper mold 1 and a lower mold 2, wherein the top wall of the upper mold 1 is provided with an exhaust hole, the bottom wall of the upper mold 1 is vertically provided with an insertion hole, the bottom wall of the lower mold 2 is provided with a feed inlet 3, the lower mold 2 is provided with a first cavity 4, the side wall of the first cavity 4 is provided with an air hole extending out of the lower mold 2, a fixing plate 5 is horizontally arranged in the first cavity 4, a first piston plate 6 is movably arranged below the fixing plate 5 in the first cavity 4, a fixing rod 7 matched with the insertion hole is vertically arranged on the top wall of the first piston plate 6, a stop block 8 is arranged on the fixing rod 7, a first spring 9 is sleeved on the part, positioned between the stop block 8 and the fixing plate 5, the lower mold 2 is provided with an oil cavity 10 communicated with the first cavity 4, a second piston plate 11 is horizontally movably arranged in the oil cavity 10, a guide pipe 12 extending to the bottom wall of the second piston plate 11 is vertically arranged on the top wall of the second piston plate 11, a mounting block 13 is fixedly mounted at the top end of the guide pipe 12, a first baffle 14 is horizontally inserted into the side wall of the mounting block 13, a round hole with the same size as the inner diameter of the guide pipe 12 is formed in the first baffle 14, first building blocks 15 are mounted on two sides of the first baffle 14 extending out of the mounting block 13, a second spring 16 fixedly connected with the first building blocks 15 is horizontally mounted on one side of the mounting block 13, a rotary spray head 17 is vertically and rotatably mounted on the top wall of the mounting block 13, a second baffle 18 is mounted on the rotary spray head 17, a groove is formed in the inner bottom wall of the lower die 2, a push plate 19 is horizontally movably arranged in the groove, and a driving mechanism for driving the push plate 19 to move is arranged on the lower die 2;
the driving mechanism comprises a second cavity 20 which is arranged on the lower die 2 and communicated with the oil cavity 10, a third piston plate 21 is horizontally movably arranged in the second cavity 20, a first push rod 22 fixedly connected with the push plate 19 is vertically arranged on the top wall of the third piston plate 21, and a dustproof mechanism is arranged on the upper die 1.
In the process of the upper die 1, the lower die 2 and the die, the fixing rod 7 gradually enters the insertion hole, when the fixing rod 7 reaches the top wall of the insertion hole, in order to complete die assembly, at this time, because the fixing rod 7 can not move upwards any more, the fixing rod 7 pushes the first piston plate 6 movably arranged in the first cavity 4 downwards, and the first spring 9 is extruded by the stop 8 moving downwards along with the fixing rod 7, during the downward movement of the first piston plate 6, the pressure in the first cavity 4 is increased, because the oil cavity 10 is communicated with the first cavity 4, the second piston plate 11 movably arranged in the oil cavity 10 moves upwards along the oil cavity 10, and the third piston plate 21 movably arranged in the second cavity 20 communicated with the oil cavity 10 also moves along the second cavity 20, so as to push the push plate 19 upwards, the push plate 19 is kept flush with the cavity of the lower die 2, and simultaneously the guide pipe 12 and the mounting block 13 mounted on the guide pipe 12 and the rotary spray head 17 both move upwards, before the rotary spray head 17 extends out of the inner wall of the lower die 2, because the first baffle plate 14 blocks the junction of the rotary spray head 17 and the guide pipe 12, the rotary spray head 17 does not start to spray oil, when the rotary spray head 17 extends out of the inner die cavity of the lower die 2, the second spring 16 pushes the first block 15, so that the first block 15 drives the first baffle plate 14 to slide along the mounting block 13, so that the round hole on the first baffle plate 14 is positioned between the guide pipe 12 and the rotary spray head 17, and plays a role of communicating the rotary spray head 17 and the guide pipe 12, at this moment, the second piston plate 11 moves to the top end of the oil cavity 10, and the fixing rod 7 continues to drive the first piston plate 6 to move downwards, under the action of high pressure, the anti-sticking oil in the oil cavity 10 is sprayed out from the rotary spray head 17, under the action of reaction, the rotary spray head 17 starts to rotate, so as to uniformly spray the anti-sticking oil on the die cavity of the lower die 2, after the molten metal is solidified, when the upper die 1 is separated from the lower die 2, the push plate 19 moves downwards along the groove, so that the contact area of the casting and the die cavity is reduced, and the function of reducing the adhesive force between the casting and the die cavity is achieved.
Referring to fig. 3, as an embodiment of the present invention, the dustproof mechanism includes an air pipe 23 vertically installed on the exhaust hole, a dustproof plate 24 extending to the outside of the air pipe 23 is inserted on a side wall of the air pipe 23, a second block 25 is installed on one side of the dustproof plate 24 located outside the air pipe 23, a third spring 26 connected to the air pipe 23 is horizontally installed on a side wall of the second block 25 close to the air pipe 23, a third cavity 27 is opened on the upper die 1, a mounting plate 28 is horizontally movably arranged in the third cavity 27, a first memory alloy 29 is vertically installed on a bottom wall of the mounting plate 28, a heat conduction plate 30 extending to the side wall of the exhaust hole is installed at a bottom end of the first memory alloy 29, and a second push rod 31 for driving the second block 25 is vertically installed on a top wall of the mounting plate 28.
In the process of injecting molten metal, air in the die cavity is exhausted from the air pipe 23, when the injected molten metal is in contact with the heat conducting plate 30, the first memory alloy 29 is heated and stretched, so that the mounting plate 28 is pushed upwards to move upwards along the third cavity 27, the second push rod 31 is driven to move upwards, the second push rod 31 pushes the second building block 25 upwards, the air pipe 23 is blocked by the dustproof plate 24, the phenomenon that the pressure in the exhaust hole is reduced due to temperature reduction to absorb external dust to be in contact with the molten metal is prevented, and the effect of preventing the casting from being polluted is achieved.
Referring to fig. 4, as an embodiment of the present invention, a linkage rod 32 extending into the first cavity 4 is horizontally installed on the conduit 12, and a pressing plate 33 driving the linkage rod 32 to move downward is horizontally installed on a side wall of the fixing rod 7.
After the rotary nozzle 17 finishes spraying the anti-sticking oil, the fixed rod 7 still moves downwards, and in the process of moving the fixed rod 7 downwards, the pressing plate 33 is driven to move downwards, so that the pressing plate 33 pushes the linkage rod 32 connected with the guide pipe 12 downwards, and the effect of driving the rotary nozzle 17 to reset is achieved.
Referring to fig. 4, a strip-shaped second memory alloy 34 is vertically mounted on the bottom wall of the push plate 19.
In the process of injecting the molten metal, the second memory alloy 34 is heated and extended in a heat transfer mode, so that the push plate 19 is pushed upwards, the effect of ensuring that the push plate 19 can be always positioned on the surface of the die cavity of the lower die 2 is achieved, and the effect of preventing the push plate 19 from moving downwards to cause irregular casting shapes due to the fact that the molten metal exerts pressure on the push plate 19 is achieved.
Referring to fig. 1, an oil pipe 35 extending to an outer side wall of the lower mold 2 is horizontally and fixedly inserted into a bottom end of a side wall of the first cavity 4.
After the anti-sticking oil in the oil cavity 10 is completely consumed, the anti-sticking oil is injected into the oil cavity 10 by arranging the oil pipe 35 extending into the first cavity 4 from the side wall of the lower die 2, so that the function of quickly oiling is achieved.
Referring to fig. 1, as one embodiment of the present invention, a dust screen 36 is attached to the tip of the air tube 23.
When upper die 1 and lower die 2 are deposited in the compound die state, dust screen 36 can prevent the dust in the air from entering the die cavity, so need not to clear up the die cavity when needs use, uses convenient and fast more.
The working principle is as follows: in the process of the upper die 1, the lower die 2 and the die, the fixing rod 7 gradually enters the insertion hole, when the fixing rod 7 reaches the top wall of the insertion hole, in order to complete die assembly, at this time, because the fixing rod 7 can not move upwards any more, the fixing rod 7 pushes the first piston plate 6 movably arranged in the first cavity 4 downwards, and the first spring 9 is pressed by the stopper 8 moving downwards along with the fixing rod 7, during the downward movement of the first piston plate 6, the pressure in the first cavity 4 increases, because the oil cavity 10 is communicated with the first cavity 4, the second piston plate 11 movably arranged in the oil cavity 10 moves upwards along the oil cavity 10, and the third piston plate 21 movably arranged in the second cavity 20 communicated with the oil cavity 10 also moves along the second cavity 20, thereby pushing the push plate 19 upwards, and during the process of injecting the metal liquid, the second memory alloy 34 is heated and expanded by means of heat transfer, the push plate 19 can be pushed upwards to prevent the push plate 19 from moving downwards due to the pressure exerted by molten metal on the push plate 19 to cause the irregular shape of a casting, meanwhile, the guide pipe 12, the mounting block 13 mounted on the guide pipe 12 and the rotary spray head 17 move upwards, before the rotary spray head 17 extends out of the inner wall of the lower die 2, the first baffle plate 14 blocks the junction of the rotary spray head 17 and the guide pipe 12, therefore, the rotary spray head 17 does not start to spray oil, when the rotary spray head 17 extends out of the inner die cavity of the lower die 2, the second spring 16 pushes the first baffle plate 15, the first baffle plate 14 is driven by the first baffle plate 15 to slide along the mounting block 13, so that a round hole on the first baffle plate 14 is positioned between the guide pipe 12 and the rotary spray head 17 to play a role of communicating the rotary spray head 17 with the guide pipe 12, at the moment, the second piston plate 11 moves to the top end of the oil cavity 10, and the fixing rod 7 continues to drive the first piston plate 6 to move downwards, under the action of high pressure, the anti-sticking oil in the oil cavity 10 is sprayed out from the rotary spray head 17, under the action of a reaction force, the rotary spray head 17 starts to rotate, so that the anti-sticking oil is uniformly sprayed on the die cavity of the lower die 2, after the anti-sticking oil is sprayed by the rotary spray head 17, the fixed rod 7 still moves downwards, in the process of moving downwards of the fixed rod 7, the pressure plate 33 is driven to move downwards, so that the pressure plate 33 pushes the linkage rod 32 connected with the guide pipe 12 downwards, the effect of driving the rotary spray head 17 to reset is achieved, in the process of injecting metal liquid, air in the die cavity is discharged from the air pipe 23, when the injected metal liquid is contacted with the heat conduction plate 30, the first memory alloy 29 is heated and extends, so that the mounting plate 28 is pushed upwards to move upwards along the third cavity 27, the second push rod 31 is driven to move upwards, the second push rod 31 pushes the second building block 25 upwards, so that the dust-proof plate 24 blocks the air pipe 23, prevent to lead to the pressure reduction in the exhaust vent to cause the phenomenon that absorbs external dust and molten metal contact because of the temperature drop, the effect of preventing the foundry goods from being contaminated has been played, after the molten metal solidification, when upper mould 1 and lower mould 2 separation, push pedal 19 moves down along the recess, thereby reduced the area of contact of foundry goods and die cavity and played the effect of reducing the adhesion force between gradually and the die cavity, after antiseized oil in oil cavity 10 consumes completely, through set up the antiseized oil of 35 notes oil into oil cavity 10 that extend to in the first cavity 4 on the lateral wall from lower mould 2, the effect of refueling is fast played, when depositing last mould 1 with lower mould 2 with the compound die state, dust screen 36 can prevent that the dust in the air from getting into in the die cavity, consequently need not to clear up the die cavity when needs to use, use convenient and fast more.
The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a precoated sand casting mould, includes mould (1) and lower mould (2), the exhaust hole has been seted up on the roof of last mould (1), the jack has vertically been seted up on the diapire of last mould (1), feed inlet (3), its characterized in that have been seted up on the diapire of lower mould (2): the improved structure of the oil-water separator is characterized in that a first cavity (4) is formed in the lower die (2), an air hole extending out of the lower die (2) is formed in the side wall of the first cavity (4), a fixing plate (5) is horizontally arranged in the first cavity (4), a first piston plate (6) is movably arranged below the fixing plate (5) in the first cavity (4), a fixing rod (7) matched with the jack is vertically arranged on the top wall of the first piston plate (6), a stop block (8) is arranged on the fixing rod (7), a first spring (9) is sleeved on the part, located between the stop block (8) and the fixing plate (5), of the fixing rod (7), an oil cavity (10) communicated with the first cavity (4) is formed in the lower die (2), a second piston plate (11) is movably arranged in the oil cavity (10), a guide pipe (12) extending to the bottom wall of the second piston plate (11) is vertically arranged on the top wall of the second piston plate (11), the guide pipe structure is characterized in that a mounting block (13) is fixedly mounted at the top end of the guide pipe (12), a first baffle (14) is horizontally inserted into the side wall of the mounting block (13), a round hole with the same size as the inner diameter of the guide pipe (12) is formed in the first baffle (14), first building blocks (15) are mounted on two sides of the first baffle (14) extending out of the mounting block (13), a second spring (16) fixedly connected with the first building blocks (15) is horizontally mounted on one side of the mounting block (13), a rotary spray head (17) is vertically and rotatably mounted on the top wall of the mounting block (13), a second baffle (18) is mounted on the rotary spray head (17), a groove is formed in the inner bottom wall of the lower die (2), a push plate (19) is horizontally and movably arranged in the groove, and a driving mechanism for driving the push plate (19) to move is arranged on the lower die (2);
actuating mechanism is including offering second cavity (20) with oil pocket (10) UNICOM on lower mould (2), horizontal activity sets third piston plate (21) in second cavity (20), vertical first push rod (22) of installing and push pedal (19) fixed connection on the roof of third piston plate (21), upward be equipped with dustproof mechanism on mould (1).
2. A coated sand casting mould according to claim 1, characterised in that: the dustproof mechanism comprises an air pipe (23) vertically arranged on the exhaust hole, a dustproof plate (24) extending out of the air pipe (23) is inserted on the side wall of the air pipe (23), one side of the dust guard (24) positioned outside the air pipe (23) is provided with a second building block (25), a third spring (26) connected with the air pipe (23) is horizontally arranged on the side wall of the second building block (25) close to one side of the air pipe (23), a third cavity (27) is arranged on the upper die (1), a mounting plate (28) is movably arranged in the third cavity (27) horizontally, a first memory alloy (29) is vertically arranged on the bottom wall of the mounting plate (28), the bottom end of the first memory alloy (29) is provided with a heat conducting plate (30) which extends to the side wall of the exhaust hole, and a second push rod (31) for driving the second building block (25) is vertically arranged on the top wall of the mounting plate (28).
3. A coated sand casting mould according to claim 1, characterised in that: the guide pipe (12) is horizontally provided with a linkage rod (32) extending into the first cavity (4), and the side wall of the fixed rod (7) is horizontally provided with a pressing plate (33) driving the linkage rod (32) to move downwards.
4. A coated sand casting mould according to claim 1, characterised in that: the bottom wall of the push plate (19) is vertically provided with a strip-shaped second memory alloy (34).
5. A coated sand casting mould according to claim 1, characterised in that: an oil pipe (35) extending to the outer side wall of the lower die (2) is horizontally and fixedly inserted at the bottom end of the side wall of the first cavity (4).
6. A coated sand casting mould according to claim 2, characterised in that: and a dust screen (36) is arranged at the top end of the air pipe (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111266272.2A CN114042864A (en) | 2021-10-28 | 2021-10-28 | Precoated sand casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111266272.2A CN114042864A (en) | 2021-10-28 | 2021-10-28 | Precoated sand casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114042864A true CN114042864A (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111266272.2A Pending CN114042864A (en) | 2021-10-28 | 2021-10-28 | Precoated sand casting mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114042864A (en) |
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| CN114506014A (en) * | 2022-02-23 | 2022-05-17 | 合肥灿恒电气科技有限公司 | Cable testing bridge device of moulding plastics |
| CN114682742A (en) * | 2022-04-09 | 2022-07-01 | 李�荣 | Sand core mould and casting mould for preparing sand core mould |
| CN118144257A (en) * | 2024-03-22 | 2024-06-07 | 成都宏明双新科技股份有限公司 | Full-automatic film wrapping machine for metal piece |
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