CN215845534U - Motor casing casting device - Google Patents
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- CN215845534U CN215845534U CN202121694741.6U CN202121694741U CN215845534U CN 215845534 U CN215845534 U CN 215845534U CN 202121694741 U CN202121694741 U CN 202121694741U CN 215845534 U CN215845534 U CN 215845534U
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Abstract
The application provides a motor casing casting device which comprises an upper sand box, a lower sand box, a mold core, a direct runner pipe and a riser pipe; the direct pouring channel pipe and the riser pipe are arranged, and the direct pouring channel pipe and the riser pipe are made of refractory materials and have fire resistance, heat insulation and the like, so that the direct pouring channel pipe and the riser pipe are isolated from molten liquid, the molten liquid is not in direct contact with the plastic film bag, the direct pouring channel pipe and the riser pipe protect the plastic film bag, the time for the plastic film bag to be burnt or gasified due to high-temperature heat transfer is delayed, the vacuum sealing time of the plastic film bag is prolonged, and more time is reserved for forming a molten liquid seal to form vacuum again; secondly, the direct runner pipe and the riser pipe have certain strength, hardness and rigidity, and can support the sand molds around the direct runner pipe and the riser pipe to a certain degree, so that the problems of sand falling, sand mold deformation, box collapse and the like caused by melt scouring, vacuum reduction, vacuum fluctuation, vacuum failure and the like during melt pouring are avoided.
Description
Technical Field
The utility model relates to the technical field of V-method casting, in particular to a motor casing casting device.
Background
The motor casing is a casing of the motor, and the motor casing is generally in a hollow cylinder shape.
The V-method casting adopts Vacuum forming, is named after the word head of the English Vacuum, namely V, and has the greatest advantage that no molding sand binder is used, the V-method casting utilizes a plastic film to seal a sand box, air in the mold is pumped out by a Vacuum pumping system, pressure difference between the inside and the outside of the mold causes dry sand to be compact to form a required cavity, the casting is solidified by core setting, box closing, pouring and Vacuum pumping, negative pressure is relieved, and the molding sand is broken along with the solidification to obtain the casting.
The V method recommends the use of shorter casting times, i.e. faster casting speeds. If the pouring is too slow, it is likely that there is no molten metal to replace the film in place after the film has partially evaporated, which may cause the mould to deform, to locally sand out when small, and to collapse when large, because the pressure differential between the mould and the mould cavity cannot be maintained.
As with sand casting, V-process casting also requires the provision of runners and risers; in the prior art, most of pouring gates and risers in V-method casting are made of moulds, plastic films are sleeved on the moulds and then buried in molding sand, then the moulds are extracted from sand moulds, and the plastic films are continuously left on the inner wall surfaces of the pouring gates and the risers to seal and coat the sand moulds to avoid air leakage; the method is characterized in that the sand mold in V-method casting is maintained by a thin plastic film, high-temperature melt flows into a pouring gate firstly, then flows into a cavity and finally flows into a riser, the plastic film is burned by the high-temperature melt to a little extent, the original vacuum of the whole sand mold is broken, the melt is required to replace the plastic film for liquid sealing, and sand falling, sand mold deformation, box collapse and the like can be caused if the liquid seal of the melt is not formed in time.
Therefore, how to provide a casting device for casting a motor casing by a V method, which delays the burning or gasification time of a plastic film by a melt, reserves more time for forming a melt liquid seal to form vacuum again, and reduces production accidents such as sand falling, sand mold deformation, crater collapse and the like caused by the reason that the melt burns the plastic film to break the vacuum and form the melt liquid seal, vacuum fluctuation, vacuum failure and the like, is a technical problem which needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
An object of an embodiment of the present invention is to provide a motor casing casting apparatus.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
a motor casing casting device comprises a cope flask, a drag flask, a mold core, a direct runner pipe and a riser pipe;
the cope box is of a rectangular frame structure enclosed by rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the wall of the inner diameter box of the cope box, and an upper vacuumizing port for communicating with an air inlet of a vacuum pump is formed in the wall of the outer diameter box of the cope box;
the lower sand box is of a rectangular frame structure formed by surrounding rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the wall of the inner diameter box of the lower sand box, and a lower vacuumizing port communicated with an air inlet of a vacuum pump is formed in the wall of the outer diameter box of the lower sand box;
an upper sand mold is arranged in the upper sand box, a lower sand mold is arranged in the lower sand box, an upper cavity is arranged in the upper sand mold, a lower cavity is arranged in the lower sand mold, the upper cavity and the lower cavity are assembled and spliced into a complete cavity, a cross runner and an inner runner are arranged on the outer surface of the top of the lower sand mold, the cross runner is communicated with one end of the inner runner, and the other end of the inner runner is communicated with the lower cavity;
the top outer surface of the upper sand mold is covered with a first plastic film for sealing, the bottom outer surface of the upper sand mold is covered with a second plastic film for sealing, the top outer surface of the lower sand mold is covered with a third plastic film for sealing, the third plastic film covers the surfaces of the lower cavity, the cross runner and the ingate, and the bottom outer surface of the lower sand mold is covered with a fourth plastic film for sealing;
the outer surface of the straight pouring channel pipe is sleeved with a first plastic film bag, the first plastic film bag hermetically seals a top end pipe orifice of the straight pouring channel pipe, the straight pouring channel pipe sleeved with the first plastic film bag is pre-embedded in the upper sand mold, the straight pouring channel pipe sleeved with the first plastic film bag penetrates through the upper sand mold, the top end surface of the straight pouring channel pipe sleeved with the first plastic film bag is flush with the top outer surface of the upper sand mold, the bottom end surface of the straight pouring channel pipe sleeved with the first plastic film bag is flush with the bottom outer surface of the upper sand mold, the bottom end pipe orifice of the straight pouring channel pipe is positioned above the cross runner, and the second plastic film hermetically seals a bottom end pipe orifice of the straight pouring channel pipe;
the outer surface of the riser pipe is sleeved with a second plastic film bag, the second plastic film bag seals and seals a top end pipe orifice of the riser pipe, the riser pipe sleeved with the second plastic film bag is pre-embedded in the upper sand mold, the riser pipe sleeved with the second plastic film bag penetrates through the upper sand mold, the top end face of the riser pipe sleeved with the second plastic film bag is flush with the top outer surface of the upper sand mold, the bottom end face of the riser pipe sleeved with the second plastic film bag is flush with the bottom outer surface of the upper sand mold, a bottom end pipe orifice of the riser pipe is located at the highest position of the cavity, and the second plastic film bag seals and seals a bottom end pipe orifice of the riser pipe;
the core is placed in the cavity in a horizontal position.
Preferably, the motor casing casting device further comprises a pouring cup, and a bottom end nozzle of the pouring cup penetrates through the first plastic film and the first plastic film bag and then is inserted into a top end nozzle of the direct pouring channel pipe.
Preferably, a rectangular annular lower sealing groove is formed in the annular top surface of the drag flask, a rectangular annular upper sealing groove is formed in the annular bottom surface of the cope flask, an O-ring for sealing is arranged in the lower sealing groove, the cross section of the lower sealing groove and the cross section of the upper sealing groove are both rectangular, and the sum of the groove depth of the lower sealing groove and the groove depth of the upper sealing groove is smaller than the outer diameter of the O-ring;
the cope flask is stacked on the drag flask provided with the O-shaped sealing ring, and the O-shaped sealing ring is positioned in the lower sealing groove and the upper sealing groove which are spliced together to form a sealed synthesis box.
Preferably, a plurality of upper exhaust pipes for vacuumizing and exhausting are arranged in the cope flask, the upper exhaust pipes are pre-embedded in the cope flask, two ends of the upper exhaust pipes in the length direction are respectively inserted into the through holes in the two opposite inner diameter box walls of the cope flask, two ends of the upper exhaust pipes in the length direction are respectively welded with the through holes in the two opposite inner diameter box walls of the cope flask in a sealing manner, and the axes of the upper exhaust pipes are located on the same arc surface so that the upper exhaust pipes surround the upper cavity;
the lower sand mold is characterized in that a plurality of lower exhaust pipes for vacuumizing and exhausting are arranged in the lower sand mold, the lower exhaust pipes are embedded in the lower sand mold, two ends of the lower exhaust pipes in the length direction are respectively inserted into through holes in two opposite inner diameter box walls of the lower sand mold, two ends of the lower exhaust pipes in the length direction are respectively welded with the through holes in the two opposite inner diameter box walls of the lower sand mold in a sealing mode, and the axes of the lower exhaust pipes are located on the same arc surface so that the lower exhaust pipes surround the lower cavity.
Preferably, the length direction of the upper exhaust pipe is parallel to the length direction of the cope flask; the length direction of the lower exhaust pipe is parallel to the length direction of the drag flask.
The application provides a motor casing casting device which comprises an upper sand box, a lower sand box, a mold core, a pouring cup, a straight pouring channel pipe and a riser pipe;
the direct pouring channel pipe is arranged, and is made of a refractory material and has certain fire resistance, heat insulation and the like, so that the direct pouring channel pipe is isolated from molten liquid, the molten liquid is not in direct contact with the first plastic film bag, the direct pouring channel pipe protects the first plastic film bag, the burning or gasification time of the first plastic film bag due to high-temperature heat transfer is delayed, the vacuum sealing time of the first plastic film bag is prolonged, more time is reserved for forming a molten liquid seal to form vacuum again, and the production accidents of sand falling, sand mold deformation, box collapse and the like caused by the fact that the molten liquid burns the first plastic film bag to break the vacuum and form the molten liquid seal are reduced, vacuum fluctuation, vacuum failure and the like are reduced; secondly, the direct runner pipe has certain strength, hardness and rigidity and can support the sand mold around the direct runner pipe to a certain degree, and the direct runner pipe is similar to a shell in investment casting, so that the problems of sand falling, sand mold deformation, box collapse and the like caused by molten liquid scouring, vacuum reduction, vacuum fluctuation, vacuum failure and the like in the prior art when molten liquid is poured are avoided;
the riser pipe is arranged in the application, and is made of a refractory material and has certain fire resistance, heat insulation and the like, so that the riser pipe isolates molten liquid, the molten liquid is not in direct contact with the second plastic film bag, the riser pipe protects the second plastic film bag, the burning or gasification time of the second plastic film bag due to high-temperature heat transfer is delayed, the vacuum sealing time of the second plastic film bag is prolonged, more time is reserved for forming molten liquid seal to form vacuum again, and the production accidents of sand falling, sand mold deformation, box collapse and the like caused by the fact that the molten liquid burns the second plastic film bag to break the vacuum and form the molten liquid seal are reduced, vacuum fluctuation is caused, and the vacuum failure and the like are reduced; secondly, the riser pipe has certain intensity, hardness and rigidity, can give the sand mould of riser pipe surrounding to a certain extent support, and the riser pipe of here is similar to the shell in the investment casting, has avoided casting the liquation among the prior art because the liquation erodees, the vacuum reduces, the vacuum fluctuation, vacuum inefficacy causes such as the sand fall, sand mould warp, the case collapse problem.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a motor casing casting apparatus according to an embodiment of the present invention (in actual production, the thickness of a plastic film is very thin, and is negligible compared with the dimensions of a sprue pipe, a riser pipe, etc., so that the thickness of the plastic film can be ignored when flush alignment is performed, but the thickness of the plastic film is purposely enlarged in FIG. 1 for clarity of the plastic film, and although the dimensional ratio is not consistent, FIG. 1 is only a schematic structural view;
in the figure: 1, an inner diameter box wall of a cope box 101, an outer diameter box wall of a cope box 102, a vacuumizing opening 103 and a sand mould 104;
2, a drag flask, an inner diameter box wall of the 201 drag flask, an outer diameter box wall of the 202 drag flask, a lower vacuum pumping port of 203, a lower sand mold of 204 and a cross gate of 205;
3, a mold core;
4, a direct runner pipe and 5 a riser pipe;
601 a first plastic film, 602 a second plastic film, 603 a third plastic film, 604 a fourth plastic film;
701 a first plastic film bag, 702 a second plastic film bag.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "axial," "radial," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "vertical," "horizontal," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the utility model and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.
In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the second feature may comprise the first feature being in direct contact with the second feature, or the first feature and the second feature being in direct contact with each other but being in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, in the figure: a cope flask 1, an inner diameter box wall 101 of the cope flask 1, an outer diameter box wall 102 of the cope flask 1, an upper vacuum-pumping port 103, and an upper sand mold 104; the method comprises the following steps of (1) preparing a drag flask 2, an inner diameter box wall 201 of the drag flask 2, an outer diameter box wall 202 of the drag flask 2, a lower vacuumizing port 203, a lower sand mold 204 and a cross gate 205; a core 3; a direct runner pipe 4, a riser pipe 5; a first plastic film 601, a second plastic film 602, a third plastic film 603, a fourth plastic film 604; a first plastic film bag 701 and a second plastic film bag 702.
The application provides a motor casing casting device which comprises a cope flask 1, a drag flask 2, a mold core 3, a direct runner pipe 4 and a riser pipe 5;
the cope flask 1 is of a rectangular frame structure enclosed by rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the inner diameter box wall 101 of the cope flask 1, and an upper vacuumizing port 103 for communicating with an air inlet of a vacuum pump is formed in the outer diameter box wall 102 of the cope flask 1;
the lower sand box 2 is a rectangular frame structure formed by enclosing rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the inner diameter box wall 201 of the lower sand box 2, and a lower vacuumizing port 203 for communicating with an air inlet of a vacuum pump is formed in the outer diameter box wall 202 of the lower sand box 2;
an upper sand mold 104 is arranged in the upper sand box 1, a lower sand mold 204 is arranged in the lower sand box 2, an upper cavity is arranged in the upper sand mold 104, a lower cavity is arranged in the lower sand mold 204, the upper cavity and the lower cavity are assembled and spliced into a complete cavity, a cross runner 205 and an inner runner are arranged on the outer surface of the top of the lower sand mold 204, the cross runner 205 is communicated with one end of the inner runner, and the other end of the inner runner is communicated with the lower cavity;
a first plastic film 601 for sealing is covered on the top outer surface of the upper sand mold 104, a second plastic film 602 for sealing is covered on the bottom outer surface of the upper sand mold 104, a third plastic film 603 for sealing is covered on the top outer surface of the lower sand mold 204, the third plastic film 603 covers the surfaces of the lower cavity, the cross runner 205 and the ingate, and a fourth plastic film 604 for sealing is covered on the bottom outer surface of the lower sand mold 204;
a first plastic film bag 701 is sleeved on the outer surface of the straight runner pipe 4, the first plastic film bag 701 seals and seals a top end pipe orifice of the straight runner pipe 4, the straight runner pipe 4 sleeved with the first plastic film bag 701 is pre-embedded in the upper sand mold 104, the straight runner pipe 4 sleeved with the first plastic film bag 701 penetrates through the upper sand mold 104, the top end surface of the straight runner pipe 4 sleeved with the first plastic film bag 701 is flush with the top outer surface of the upper sand mold 104, the bottom end surface of the straight runner pipe 4 sleeved with the first plastic film bag 701 is flush with the bottom outer surface of the upper sand mold 104, a bottom end pipe orifice of the straight runner pipe 4 is positioned above the cross runner 205, and the second plastic film 602 seals and seals a bottom end pipe orifice of the straight runner pipe 4;
the outer surface of the riser pipe 5 is sleeved with a second plastic film bag 702, the second plastic film bag 702 seals and seals a top pipe orifice of the riser pipe 5, the riser pipe 5 sleeved with the second plastic film bag 702 is pre-embedded in the upper sand mold 104, the riser pipe 5 sleeved with the second plastic film bag 702 penetrates through the upper sand mold 104, the top end surface of the riser pipe 5 sleeved with the second plastic film bag 702 is flush with the top outer surface of the upper sand mold 104, the bottom end surface of the riser pipe 5 sleeved with the second plastic film bag 702 is flush with the bottom outer surface of the upper sand mold 104, a bottom pipe orifice of the riser pipe 5 is positioned at the highest position of the cavity, and the second plastic film 602 seals and seals the bottom end of a pipe orifice of the riser pipe 5;
the core 3 is placed in the cavity in a horizontal position.
In one embodiment of the present application, the motor casing casting apparatus further comprises a pouring cup, the bottom nozzle of which penetrates the first plastic film 601 and the first plastic film bag 701 and then is inserted into the top nozzle of the sprue pipe 4.
The application provides a motor casing casting device which comprises an upper sand box, a lower sand box, a mold core, a direct pouring way pipe and a riser pipe;
the direct pouring channel pipe is arranged, and is made of a refractory material and has certain fire resistance, heat insulation and the like, so that the direct pouring channel pipe is isolated from molten liquid, the molten liquid is not in direct contact with the first plastic film bag, the direct pouring channel pipe protects the first plastic film bag, the burning or gasification time of the first plastic film bag due to high-temperature heat transfer is delayed, the vacuum sealing time of the first plastic film bag is prolonged, more time is reserved for forming a molten liquid seal to form vacuum again, and the production accidents of sand falling, sand mold deformation, box collapse and the like caused by the fact that the molten liquid burns the first plastic film bag to break the vacuum and form the molten liquid seal are reduced, vacuum fluctuation, vacuum failure and the like are reduced; secondly, the direct runner pipe has certain strength, hardness and rigidity and can support the sand mold around the direct runner pipe to a certain degree, and the direct runner pipe is similar to a shell in investment casting, so that the problems of sand falling, sand mold deformation, box collapse and the like caused by molten liquid scouring, vacuum reduction, vacuum fluctuation, vacuum failure and the like in the prior art when molten liquid is poured are avoided;
the riser pipe is arranged in the application, and is made of a refractory material and has certain fire resistance, heat insulation and the like, so that the riser pipe isolates molten liquid, the molten liquid is not in direct contact with the second plastic film bag, the riser pipe protects the second plastic film bag, the burning or gasification time of the second plastic film bag due to high-temperature heat transfer is delayed, the vacuum sealing time of the second plastic film bag is prolonged, more time is reserved for forming molten liquid seal to form vacuum again, and the production accidents of sand falling, sand mold deformation, box collapse and the like caused by the fact that the molten liquid burns the second plastic film bag to break the vacuum and form the molten liquid seal are reduced, vacuum fluctuation is caused, and the vacuum failure and the like are reduced; secondly, the riser pipe has certain intensity, hardness and rigidity, can give the sand mould of riser pipe surrounding to a certain extent support, and the riser pipe of here is similar to the shell in the investment casting, has avoided casting the liquation among the prior art because the liquation erodees, the vacuum reduces, the vacuum fluctuation, vacuum inefficacy causes such as the sand fall, sand mould warp, the case collapse problem.
When the melt is poured, the melt burns and evaporates the second plastic film 602 and the third plastic film 603 to remove, so that the vacuum of the cope flask 1 and the drag flask 2 which are combined together is maintained by the first plastic film 601 and the fourth plastic film 604 in a sealing manner, that is, the gas is communicated between the cope flask 1 and the drag flask 2, that is, the overlapped cope flask 1 and the drag flask 2 can be regarded as a combined large vacuum box, therefore, the sealing performance of the combined large vacuum box is ensured as much as possible at this time, and the gas leakage at the joint of the cope flask 1 and the drag flask 2 is reduced as much as possible;
for this purpose, in one embodiment of the present application, a rectangular annular lower seal groove is provided on the annular top surface of the drag flask 2, a rectangular annular upper seal groove is provided on the annular bottom surface of the cope flask 1, an O-ring for sealing is provided in the lower seal groove, the cross section of the lower seal groove and the cross section of the upper seal groove are both rectangular, and the sum of the groove depth of the lower seal groove and the groove depth of the upper seal groove is smaller than the outer diameter of the O-ring;
the cope flask 1 is stacked on the drag flask 2 provided with an O-shaped sealing ring, and the O-shaped sealing ring is positioned in the lower sealing groove and the upper sealing groove which are spliced together to form a sealed synthesis box;
the O-shaped sealing ring is arranged at the joint of the upper sand box 1 and the lower sand box 2 to prevent the joint from air leakage, so that the sealing performance of the synthesis box is improved, and the casting efficiency and the casting performance are improved;
the O-ring should be embedded in the lower sealing groove on the top surface of the bottom sand box 2, and the O-ring should be fixed by the lower sealing groove, and moreover, the O-ring should not protrude too much outside the lower sealing groove, and the outer diameter of the O-ring is sufficient to achieve the sealing of the joint gap between the cope box 1 and the bottom sand box 2, and also to enable the sand mold without a cavity in the cope box 1 to contact the sand mold without a cavity in the bottom sand box 2, so that the sand mold located below bears the weight of the sand mold located above.
In the prior art, a motor casing with a larger volume is provided, at this time, a cope flask 1 and a drag flask 2 with a larger volume need to be matched and used correspondingly, a cope sand mold 104 and a drag sand mold 204 with a larger volume need to be matched and used correspondingly, more molding sand needs to be used correspondingly, a larger vacuum pump needs to be used correspondingly, when the volumes of the sand molds in the sand molds and the boxes are larger, the problem of uneven vacuum degree in different areas in the sand molds is caused, the higher the vacuum degree in an area closer to a vacuumizing port is, the lower the vacuum degree in an area farther from the vacuumizing port is, the higher the compaction degree of the sand in an area with a high vacuum degree is, the lower the compaction degree of the sand in an area with a low vacuum degree is, and the uneven compaction degree easily causes sand falling, cavity deformation and even box collapse;
in order to reduce the degree of non-uniform vacuum degree in different areas in the sand mold, particularly reduce the degree of non-uniform vacuum degree in different areas around the mold cavity, and perform key area reinforcing on the sand around the mold cavity, in an embodiment of the present application, a plurality of upper exhaust pipes for evacuation and exhaust are arranged in the cope flask 1, the plurality of upper exhaust pipes are pre-embedded in the cope mold 104, both ends in the length direction of the upper exhaust pipes are respectively inserted into through holes on two opposite inner diameter box walls of the cope flask 1, both ends in the length direction of the upper exhaust pipes are respectively in sealing welding with the through holes on two opposite inner diameter box walls of the cope flask 1, and the axes of the plurality of upper exhaust pipes are located on the same arc surface so that the plurality of upper exhaust pipes surround the upper mold cavity;
the lower sand mold 204 is internally provided with a plurality of lower exhaust pipes for vacuumizing and exhausting, the lower exhaust pipes are embedded in the lower sand mold, two ends of the lower exhaust pipes in the length direction are respectively inserted into through holes in two opposite inner diameter box walls of the lower sand mold 2, two ends of the lower exhaust pipes in the length direction are respectively welded with the through holes in the two opposite inner diameter box walls of the lower sand mold 2 in a sealing manner, and the axes of the lower exhaust pipes are positioned on the same arc surface so that the lower exhaust pipes surround the lower cavity;
here, because the upper exhaust pipe is additionally added in the upper sand mold 104 and penetrates through the whole length of the upper sand mold 104, the gas in the upper sand mold 104 can firstly enter the upper exhaust pipe, then enter the hollow cavity in the wall of the cope flask 1 and then be exhausted from the upper vacuum-pumping port to the vacuum pump, so that the exhaust of different areas in the upper sand mold 104 is remarkably improved, the vacuum degree of different areas in the upper sand mold 104 is higher, and the non-uniform degree of the vacuum degree of different areas in the upper sand mold 104 is remarkably reduced;
furthermore, the axes of the upper exhaust pipes are positioned on the same arc surface, so that the upper exhaust pipes surround the upper cavity, the upper cavity of the motor shell is also semi-cylindrical, and the upper exhaust pipes arranged in a circular arc shape surround the upper cavity in a short distance, so that the non-uniform degree of vacuum degrees in different areas around the upper cavity is reduced, the sand around the upper cavity is subjected to key area reinforcement, the compactness of the sand around the upper cavity is remarkably improved, sand falling, cavity deformation and even crush are avoided, and the casting efficiency and the casting performance are improved;
here, the lower vent pipe provided in the drag flask 2 is the same as the upper vent pipe provided in the cope flask 1.
In one embodiment of the present application, the length direction of the upper exhaust pipe is parallel to the length direction of the cope flask 1; the length direction of the lower exhaust pipe is parallel to the length direction of the drag flask 2.
As shown in fig. 1, the present application provides a motor casing casting apparatus in a state after being assembled together but without a pouring cup being installed; when casting is really needed, the bottom nozzle of the pouring cup needs to penetrate the first plastic film 601 and the first plastic film bag 701 and then is inserted into the top nozzle of the straight pouring channel pipe 4, and the first plastic film 601 and the second plastic film bag 702 at the top nozzle of the riser pipe 5 need to be removed, so that the top nozzle of the riser pipe 5 is opened, and air is conveniently exhausted.
Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (5)
1. A motor casing casting device is characterized by comprising a cope flask, a drag flask, a mold core, a direct runner pipe and a riser pipe;
the cope box is of a rectangular frame structure enclosed by rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the wall of the inner diameter box of the cope box, and an upper vacuumizing port for communicating with an air inlet of a vacuum pump is formed in the wall of the outer diameter box of the cope box;
the lower sand box is of a rectangular frame structure formed by surrounding rectangular pipes, an exhaust hole for vacuumizing and exhausting is formed in the wall of the inner diameter box of the lower sand box, and a lower vacuumizing port communicated with an air inlet of a vacuum pump is formed in the wall of the outer diameter box of the lower sand box;
an upper sand mold is arranged in the upper sand box, a lower sand mold is arranged in the lower sand box, an upper cavity is arranged in the upper sand mold, a lower cavity is arranged in the lower sand mold, the upper cavity and the lower cavity are assembled and spliced into a complete cavity, a cross runner and an inner runner are arranged on the outer surface of the top of the lower sand mold, the cross runner is communicated with one end of the inner runner, and the other end of the inner runner is communicated with the lower cavity;
the top outer surface of the upper sand mold is covered with a first plastic film for sealing, the bottom outer surface of the upper sand mold is covered with a second plastic film for sealing, the top outer surface of the lower sand mold is covered with a third plastic film for sealing, the third plastic film covers the surfaces of the lower cavity, the cross runner and the ingate, and the bottom outer surface of the lower sand mold is covered with a fourth plastic film for sealing;
the outer surface of the straight pouring channel pipe is sleeved with a first plastic film bag, the first plastic film bag hermetically seals a top end pipe orifice of the straight pouring channel pipe, the straight pouring channel pipe sleeved with the first plastic film bag is pre-embedded in the upper sand mold, the straight pouring channel pipe sleeved with the first plastic film bag penetrates through the upper sand mold, the top end surface of the straight pouring channel pipe sleeved with the first plastic film bag is flush with the top outer surface of the upper sand mold, the bottom end surface of the straight pouring channel pipe sleeved with the first plastic film bag is flush with the bottom outer surface of the upper sand mold, the bottom end pipe orifice of the straight pouring channel pipe is positioned above the cross runner, and the second plastic film hermetically seals a bottom end pipe orifice of the straight pouring channel pipe;
the outer surface of the riser pipe is sleeved with a second plastic film bag, the second plastic film bag seals and seals a top end pipe orifice of the riser pipe, the riser pipe sleeved with the second plastic film bag is pre-embedded in the upper sand mold, the riser pipe sleeved with the second plastic film bag penetrates through the upper sand mold, the top end face of the riser pipe sleeved with the second plastic film bag is flush with the top outer surface of the upper sand mold, the bottom end face of the riser pipe sleeved with the second plastic film bag is flush with the bottom outer surface of the upper sand mold, a bottom end pipe orifice of the riser pipe is located at the highest position of the cavity, and the second plastic film bag seals and seals a bottom end pipe orifice of the riser pipe;
the core is placed in the cavity in a horizontal position.
2. The motor casing casting apparatus of claim 1, further comprising a pouring cup, a bottom end nozzle of which penetrates the first plastic film and the first plastic film bag and then is inserted into a top end nozzle of the sprue pipe.
3. The motor casing casting device according to claim 1, wherein a rectangular annular lower sealing groove is formed in the annular top surface of the drag flask, a rectangular annular upper sealing groove is formed in the annular bottom surface of the cope flask, an O-ring for sealing is arranged in the lower sealing groove, the cross section of the lower sealing groove and the cross section of the upper sealing groove are both rectangular, and the sum of the groove depth of the lower sealing groove and the groove depth of the upper sealing groove is smaller than the outer diameter of the O-ring;
the cope flask is stacked on the drag flask provided with the O-shaped sealing ring, and the O-shaped sealing ring is positioned in the lower sealing groove and the upper sealing groove which are spliced together to form a sealed synthesis box.
4. The motor casing casting device according to claim 1, wherein a plurality of upper exhaust pipes for vacuum exhaust are arranged in the cope flask, the plurality of upper exhaust pipes are pre-embedded in the cope flask, two ends of the upper exhaust pipes in the length direction are respectively inserted into the through holes in the two opposite inner diameter box walls of the cope flask, two ends of the upper exhaust pipes in the length direction are respectively welded with the through holes in the two opposite inner diameter box walls of the cope flask in a sealing manner, and the axes of the plurality of upper exhaust pipes are located on the same arc surface so that the plurality of upper exhaust pipes surround the upper cavity;
the lower sand mold is characterized in that a plurality of lower exhaust pipes for vacuumizing and exhausting are arranged in the lower sand mold, the lower exhaust pipes are embedded in the lower sand mold, two ends of the lower exhaust pipes in the length direction are respectively inserted into through holes in two opposite inner diameter box walls of the lower sand mold, two ends of the lower exhaust pipes in the length direction are respectively welded with the through holes in the two opposite inner diameter box walls of the lower sand mold in a sealing mode, and the axes of the lower exhaust pipes are located on the same arc surface so that the lower exhaust pipes surround the lower cavity.
5. The motor casing casting apparatus as claimed in claim 4, wherein a length direction of the upper exhaust duct is parallel to a length direction of the cope flask; the length direction of the lower exhaust pipe is parallel to the length direction of the drag flask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694741.6U CN215845534U (en) | 2021-07-23 | 2021-07-23 | Motor casing casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121694741.6U CN215845534U (en) | 2021-07-23 | 2021-07-23 | Motor casing casting device |
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| Publication Number | Publication Date |
|---|---|
| CN215845534U true CN215845534U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121694741.6U Active CN215845534U (en) | 2021-07-23 | 2021-07-23 | Motor casing casting device |
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| Country | Link |
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| CN (1) | CN215845534U (en) |
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