CN109014083B - Filling and coating method for integral sand mold of casting with complex structure - Google Patents
Filling and coating method for integral sand mold of casting with complex structure Download PDFInfo
- Publication number
- CN109014083B CN109014083B CN201810980152.0A CN201810980152A CN109014083B CN 109014083 B CN109014083 B CN 109014083B CN 201810980152 A CN201810980152 A CN 201810980152A CN 109014083 B CN109014083 B CN 109014083B
- Authority
- CN
- China
- Prior art keywords
- sand mold
- coating
- integral
- cavity
- integral sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The invention relates to a filling method of an integral sand mold of a casting with a complex structure in the technical field of casting sand mold treatment, wherein the integral sand mold is formed by an additive manufacturing method, then sand cleaning treatment is carried out on an inner cavity of the sand mold, filling treatment of sand-sticking-preventing coating is carried out on the inner cavity of the integral sand mold after sand cleaning treatment, a pore passage on the surface facing to the lower surface of an orifice communicated with the inner cavity of the sand mold is blocked before filling, coating is filled into a cavity from the largest orifice communicated with the inner cavity at the top of the sand mold until the coating is filled to enable the coating to overflow from other orifices, finally, the blockage of each blocked pore passage is removed, the coating in the integral cavity is enabled to completely flow out, and then the integral sand mold is transferred to baking equipment for. By the pouring coating method, the invisible cavity surface in the whole sand mold can be uniformly and comprehensively coated, and coating waste caused by coating of non-coated parts is reduced.
Description
Technical Field
The invention relates to the technical field of casting sand mold treatment, in particular to a filling and coating method for an integral sand mold of a casting with a complex structure manufactured by an additive manufacturing method.
Background
In recent years, 3D printing technology has been rapidly developed in the field of casting. In the conventional casting, a sand mold is manufactured by using molding sand and a binder through a molding machine or manually, and the molding sand and the binder need to be mixed in advance and then filled into a prepared pattern cavity. When the 3D printing technology is used for producing the sand mold, a layer of molding sand is laid firstly, then the binder is sprayed, then the sand is continuously laid and the binder is sprayed, and a layer of sand is stacked to form the three-dimensional sand mold. The position of the printing head for spraying the adhesive is determined by the axial slice of the sand mould finished product. The method is a typical additive manufacturing mode, can directly produce the sand mold with a complex space structure, can realize less parting as much as possible, greatly reduces the number of the sand mold, even does not split the sand mold at all, and is particularly suitable for producing the casting sand mold with a complex inner cavity structure.
When the sand mold is integrated to be completely disassembled, the cavity of the casting is completely surrounded by the sand mold, so that a large number of areas are not touched and visible, redundant sand materials laid in the cavity area in 3D printing are inconvenient to remove, and meanwhile, the application of the anti-sticking sand coating in the cavity of the sand mold of the casting with a complex internal structure has the problem that the invisible part is not uniformly applied or is not coated.
Conventional coating application methods are directed to open face cores, such as manual brushing, spraying, flow coating, which allows the coating to flow over the surface of the core being applied, whereas dipping allows all of the sand mold surfaces to be coated with the coating, typically for cavity cores. For the whole sand mold with a closed inner cavity, brushing, spraying and flow coating can not be implemented at all, while dip coating can cause the surface which is not suitable for covering the coating to be dipped and hung with the coating, thereby not only causing the waste of the coating, but also causing the influence on other functional designs, such as air outlet and core bar penetration.
Disclosure of Invention
The invention provides a pouring and coating method for an integral sand mold of a casting with a complex structure, aiming at the problem that the integral sand mold manufactured by an additive manufacturing method in the prior art is inconvenient to coat.
The invention aims to realize the method for filling the integral sand mold of the casting with the complex structure, the integral sand mold is integrally manufactured by an additive manufacturing method, a casting system, an exhaust system, a feeding system, a core bone preset hole for placing a core bone, a sand cleaning hole for cleaning a blind hole part of an inner cavity of the integral sand mold and an exhaust hole for exhausting the sand mold are arranged in the integral sand mold, at least one group of hanging handles for hanging are arranged outside the sand mold, the integral sand mold is molded by the additive manufacturing method and then is subjected to sand cleaning treatment of the inner cavity of the sand mold, the method is characterized in that the inner cavity of the integral sand mold after sand cleaning treatment is subjected to filling treatment of anti-sticking paint, a pore passage on the lower surface of an orifice communicated with the inner cavity of the sand mold is blocked before filling, the paint is filled into the cavity from the largest orifice communicated with the inner cavity at the top of the sand mold until the paint is filled, so that the paint overflows from other orifices, and finally, removing the plugging of each plugged pore channel to enable the coating in the integral cavity to completely flow out, and transferring the integral sand mold to baking equipment for baking treatment.
The integral sand mold formed by the additive manufacturing method has a complex inner cavity structure, the formed sand mold is an integral sand mold which does not need to be separated, most of inner cavities of the sand mold are invisible, bottom plugging is adopted for applying the inner cavity surfaces in a coating mode from the upper part in order to facilitate uniform and comprehensive application of the inner cavity surfaces, after the cavities are filled with the coating, the plugging is removed, so that the coating flows out from downward orifices under the action of gravity, in the coating process, except for a main coating port, other unblocked holes communicated with the cavities form exhaust ports in the coating process, and the pressure of each part in the cavities is also conveniently balanced, so that the coating is uniformly coated. Therefore, the filling method can uniformly and comprehensively coat the invisible cavity surface in the whole sand mold and reduce the coating waste caused by coating of non-coated parts.
In order to conveniently and quickly plug a downward orifice in the filling and coating process, when a pore passage with the orifice downward is plugged, plugging is carried out through a plugging tool, the plugging tool comprises two parallel upper cross rods and two parallel lower cross rods, a pull rod is vertically connected between each upper cross rod and the corresponding lower cross rod, a groove ring sleeved with each lower cross rod is arranged at the lower end of each pull rod, the upper end of each pull rod is fixedly connected with the corresponding upper cross rod, a bottom plate is supported on the upper sides of the two lower cross rods, a soft plate is arranged on the upper side of each bottom plate, the upper side of each soft plate is tightly attached to the bottom surface of a whole sand mold and plugs the downward orifice of the whole sand mold, and the top surface of the whole sand mold is fixedly. By adopting the plugging tool, the flexible plate is supported by the bottom plate, the workpiece is arranged on the flexible bottom, the flexible plate is tightly attached to the bottom surface of the workpiece through the upper cross rod, the lower cross rod and the pull rod, all orifices of the bottom surface can be plugged, so that the coating in the cavity can be prevented from flowing out from the bottom hole during filling, and other holes which are not communicated with the cavity, such as sand mold exhaust ports, core bone reserved holes and other non-flow coating hole adhesion coatings, can also be prevented.
In order to further realize the coating process of the invention, the coating treatment process of the invention specifically comprises the following steps:
A) plugging an orifice at the bottom of the integral sand mold through a plugging tool, adjusting the distance between two lower cross rods to be smaller than the contact overall dimension of the integral sand mold and a soft plate according to the dimension of the integral sand mold, sequentially arranging a bottom plate and the soft plate on the upper sides of the lower cross rods, hoisting the integral sand mold onto the soft plate through a hoisting tool and placing the integral sand mold in the center, correspondingly arranging an upper cross rod at the position, vertically opposite to the lower cross rods, on the top side of the integral sand mold, and tightly attaching the bottom plate and the soft plate to the surface of the integral sand mold through pull rods;
B) blocking the orifices of the sand mold vent holes, which are not communicated with the cavity, on the side surface of the whole sand mold and all the orifices, which are connected with the cavity and have the pore diameter of more than 10mm, by sand plugs;
C) hoisting the whole sand mold together with the plugging tool to a position above the dip-coating liquid level of the dip-coating pool by using a hoisting tool, and pouring a coating into the cavity from a maximum orifice at the top of the whole sand mold, which is communicated with the cavity, until the whole cavity and a pore passage communicated with the cavity are directly filled; then loosening the pull rod, and detaching the upper cross rod, the lower cross rod, the soft plate and the bottom plate to enable the coating to flow out of each orifice and fall back to the dip-coating pool;
D) rotating the whole sand mold for at least two circles along a central shaft corresponding to the hanging handle at a rotating speed of 1-2 revolutions/min under a hanging state so as to change the direction of each orifice communicated with the cavity, uniformly coating the coating in the cavity on the inner wall of the cavity and discharging the redundant coating along the corresponding orifice;
E) and transferring the whole sand mold after being coated to a baking device for baking treatment.
Through the filling process, all parts of a cavity in the whole sand mold can be uniformly and comprehensively coated, all orifices at the bottom of the whole sand mold are completely blocked by means of the blocking tool during filling, the sand mold is suspended above the dip-coating pool and is filled from a large orifice at the upper part, after the filling, the blocking tool is removed, the blockage at the bottom is removed, the coating preferentially flows out from all holes at the bottom, meanwhile, the flowing hole channels are coated, then, the coating is further uniformly coated on all parts in the cavity through rotation, and redundant coating is discharged. In addition, except that the bottom hole is completely blocked, only the hole with the aperture larger than 10mm is blocked on the side surface, the purpose is to reduce a large amount of outflow when the coating is not filled, and the hole with the aperture smaller than 10mm is opened, so that the coating at the small hole part can smoothly pass through and be coated, the influence of the small amount of outflow coating of the small hole which is not blocked on the amount of coating used for filling the inner cavity is not obvious, and the outflow coating directly falls back to the bottom flow coating pool, so that the waste of the coating is not caused.
In order to facilitate the fastening connection of the pull rod and the upper cross rod, external threads are arranged on the periphery of the upper end of the pull rod, a through hole is formed in the position, corresponding to the upper cross rod, of the pull rod, and the pull rod penetrates through the through hole and then is fastened through a gasket and a nut.
In order to facilitate the plugging of the bottom hole, the soft board is a foam soft board with the thickness of 50-100 mm.
In order to facilitate uniform coating of the coating, the Baume degree of the coating is 35-45.
In order to facilitate the drying of the coating after coating, the baking process in the step E) comprises the following steps: the integral sand mold is firstly transferred into a surface drying kiln for baking at the baking temperature of 120 ℃ for 20-40 min, so that the coating is pre-dried, then the integral sand mold is transferred into a hot air baking furnace, a baking main air inlet enters from the largest cavity opening of the integral sand mold, the air outlet temperature of the hot air baking furnace is 60-110 ℃, and the baking time is 40-60 min.
In order to facilitate the manufacturing and molding of the integral sand mold, the integral sand mold is molded through 3D printing, a 3D printing model is firstly designed before the 3D printing is carried out, a casting model is firstly modeled through three-dimensional modeling software, an exhaust system, a feeding system and a pouring system are directly designed on the casting model to complete the modeling of the model I, then drawing a square entity which can completely wrap the first model through three-dimensional modeling software, then obtaining the integral sand mold of the casting by using the entity of the first model to calculate the difference of the square entity, then a plurality of sand cleaning holes which are convenient for cleaning the blind hole parts of the cavity are arranged in the integral sand mould model, the core bar preformed hole which is used for increasing the strength of the weak part of the sand mould and is convenient for arranging the core bar is used for exhausting the sand mould and exhausting the exhaust hole which is not communicated with the cavity, and the final modeling of the whole sand mould model is completed.
Drawings
Fig. 1 is a perspective view (oblique upper view) showing a schematic structure of an integral sand mold using a cylinder head casting as an example.
FIG. 2 is a perspective view of the other viewing angle direction of FIG. 1 (oblique lower viewing angle)
Fig. 3 is a first view of an internal cutting structure of the integral sand mold of the cylinder cover.
Fig. 4 is a second view of the internal cutting structure of the whole sand mold of the cylinder cover.
Fig. 5 is a third internal sectional structural view of the whole sand mold of the cylinder cover.
Fig. 6 is a schematic structural diagram of the plugging tool.
Fig. 7 is a schematic connection diagram of the whole sand mold and the plugging tool during coating.
Wherein, 1 flow sand hole, 2 exhaust holes; 3, a pouring gate and 4 type marks; 5, hanging a handle; 6, marking; 7, positioning holes; 8, sand mould exhaust ports; 9, forming a cavity; 10 core bar reserved holes; 11, cleaning sand holes; 12 a lower cross bar; 13 a pull rod; 14, an upper cross bar; 15 a nut; 16 soft boards; 17 a base plate.
Detailed Description
The method for pouring and coating the overall sand mold of the casting with the complex structure is described in detail by taking a specific sand mold of a cylinder cover casting as an example.
The cylinder cap is the core part of high performance diesel engine, and it is installed on the cylinder hole of diesel engine, is responsible for providing air and oil mist for the piston motion, bears high temperature, high pressure and high frequency vibrations environment, has direct influence to fuel conversion efficiency, and its structure is unusual complicated, often has a plurality of air cavitys and water cavity structures each other for crisscross. The conventional die casting method needs to remove the pattern material, dozens of sand cores need to be separated for producing the sand cores of the casting, the manufacturing is difficult, the molding operation is difficult, the cleaning of the interior of the sand mold and the coating difficulty of a cavity are difficult, the casting process is long, the efficiency is low, and the waste is more.
The integral sand mold of the cylinder cover casting in the embodiment is formed through an additive manufacturing method, specifically 3D printing forming, in order to facilitate implementation of 3D printing, three-dimensional modeling of a 3D printing product is firstly carried out, and three-dimensional modeling is carried out through three-dimensional printingModelingModeling a casting model by software, directly designing an exhaust system, a feeding system and a pouring system on the casting model to complete modeling of a first model, drawing a square entity capable of completely wrapping the first model by three-dimensional modeling software, calculating the difference of the entity of the first model on the square entity to obtain an integral sand mold of the casting, and arranging a plurality of sand cleaning holes 11 which are convenient for cleaning the tail end of a cavity and the blind hole part in the integral sand mold model for increasing sand cleaning holes 11 for cleaning the tail end of the cavity and the blind hole partThe strength of a weak part of a sand mold is convenient to set a core bar preformed hole 10 of a core bar, a sand mold vent hole 8 which is used for exhausting gas after a binder in the sand mold is vaporized and is not communicated with a mold cavity, namely, the preliminary modeling of a whole sand mold model is completed as shown in figure 1, a model mark 4 of a product and a hanging handle 5 which is convenient for hanging and transferring the sand mold are further arranged in the whole sand mold for the recognition of the mark, more than one pair of hanging handles are generally symmetrically arranged on the outer side of the sand mold according to the product structure, the size and the weight, a marking mark 6 used for marking the direction is further arranged on the surface of the whole sand mold, a sand flowing hole 1 which is convenient to discharge scattered sand in a main body mold cavity 9, positioning holes 7 for positioning assistance, exhaust vent holes 2 for facilitating the pouring, and other paving assistance structures are further used for completing.
And slicing the whole sand mold after final modeling, performing layer-by-layer branch sand laying and printing to complete 3D printing of the whole sand mold, performing sand cleaning treatment on non-bonding parts of the whole sand mold, and finally baking to manufacture the whole sand mold.
Then, the integral sand mold is subjected to pouring coating treatment according to the method of the invention, which comprises the following steps:
A) plugging all orifices at the bottom of the whole sand mold through a plugging tool as shown in fig. 6, adjusting the distance between two lower cross bars 12 on an operation platform according to the size of the whole sand mold to be smaller than the contact outline size of the whole sand mold and a soft plate 16, sequentially arranging a bottom plate 17 and the soft plate 16 on the upper sides of the lower cross bars 12, then hoisting the whole sand mold to the soft plate 16 through a hoisting tool and placing the whole sand mold in the middle, correspondingly arranging an upper cross bar 14 at the position of the top side of the whole sand mold, which is vertically opposite to the lower cross bar 12, and respectively fixedly connecting through holes of a pull rod 13 penetrating through the upper cross bar 14 through a gasket and a nut 15 to enable the bottom plate 17 and the soft plate 16 to be; in the embodiment, for convenience of reliable plugging, the flexible board is a foam flexible board with the thickness of 50-100 mm; in addition, in order to facilitate the quick connection of the pull rod and the lower cross rod, the lower end of the pull rod is provided with a groove ring which is convenient to be sleeved with the lower cross rod and can be directly sleeved with the lower cross rod;
B) blocking the orifices of the sand mold vent holes 8, the side surfaces of the whole sand mold are not communicated with the cavity, and all the orifices, which are connected with the cavity and have the aperture larger than 10mm, by sand plugs so as to prevent the coating from flowing out during coating;
C) the integral sand mold together with the plugging tool is hoisted to be above the dip-coating liquid level of the dip-coating pool through a hoisting tool, coating is poured into the cavity from the position of a maximum orifice at the top of the integral sand mold, which is communicated with the cavity, so that the coating is uniformly coated, and the baume degree of the coating used in the pouring process is 35-45; then loosening the nut 16 connected with the pull rod 13, and removing the upper cross bar 14, the lower cross bar 12, the soft plate 16 and the bottom plate 17, so that the coating flows out from each downward orifice and falls back to the dip-coating tank;
D) rotating the whole sand mold for at least two circles along a central shaft corresponding to the hanging handle 5 at a rotating speed of 1-2 revolutions per minute in a hanging state, so that the coating in the cavity is uniformly coated on the inner wall of the cavity and redundant coating is discharged along a corresponding orifice;
E) transferring the whole sand mold after being coated into a baking device for baking treatment, wherein the baking process comprises the following steps: the integral sand mold is firstly transferred into a surface drying kiln for baking at the baking temperature of 120 ℃ for 20-40 min, so that the coating is pre-dried, then the integral sand mold is transferred into a hot air baking furnace, a baking main air inlet enters from the largest cavity opening of the integral sand mold, the air outlet temperature of the hot air baking furnace is 60-110 ℃, and the baking time is 40-60 min.
The integral sand mold formed by the additive manufacturing method has a complex inner cavity structure, the formed sand mold is an integral sand mold which does not need to be separated, most of inner cavities of the sand mold are invisible, and in order to facilitate uniform and comprehensive coating on the inner cavity surface, the auxiliary blocking tool is used for completely blocking all orifices at the bottom of the integral sand mold, so that the sand mold is suspended above a dip-coating pool and is filled from a larger orifice at the upper part, after the dip-coating pool is filled, the blocking tool is removed, the blocking at the bottom is removed, so that coating preferentially flows out from all holes at the bottom, meanwhile, the flowing hole channels are coated, then the coating is further uniformly coated on all parts in the cavities by rotating, and redundant coating is discharged. In addition, except that the bottom hole is completely blocked, only the hole with the aperture larger than 10mm is blocked on the side surface, the purpose is to reduce a large amount of outflow when the coating is not filled, and the hole with the aperture smaller than 10mm is opened, so that the coating at the small hole part can smoothly pass through and be coated, the influence of the small amount of outflow coating of the small hole which is not blocked on the amount of coating used for filling the inner cavity is not obvious, and the outflow coating directly falls back to the bottom flow coating pool, so that the waste of the coating is not caused.
Therefore, the filling method can uniformly and comprehensively coat the invisible cavity surface in the whole sand mold, reduce coating waste caused by coating of non-coating parts and solve the problem of coating the cavity coating of the whole sand mold with a non-parting complex structure.
Claims (6)
1. A method for filling and coating an integral sand mold of a casting with a complex structure comprises the steps of integrally manufacturing the integral sand mold into a core through an additive manufacturing method, arranging a pouring system, an exhaust system, a feeding system, a core frame preset hole for placing a core frame, a sand cleaning hole for cleaning a blind hole part of an inner cavity of the integral sand mold and an exhaust hole for exhausting the sand mold in the integral sand mold, arranging at least one group of hanging handles for lifting and conveying outside the sand mold, performing sand cleaning treatment on the inner cavity of the sand mold after the integral sand mold is cleaned after the integral sand mold is formed through the additive manufacturing method, performing filling and coating treatment on anti-sticking sand coating on the inner cavity of the integral sand mold after the sand cleaning treatment, plugging a pore passage with the lower surface of an orifice communicated with the inner cavity of the sand mold before filling, filling the coating into the cavity from the largest orifice communicated with the inner cavity at the top of the sand mold until the coating is filled, finally, plugging the plugged pore passages, enabling the coating in the integral cavity to flow out completely, and transferring the integral sand mold to baking equipment for baking treatment; in the filling and coating treatment process, when a pore passage with a downward hole opening is blocked, the pore passage is blocked through a blocking tool, the blocking tool comprises two parallel upper cross rods and two parallel lower cross rods, a pull rod is vertically connected between each upper cross rod and the corresponding lower cross rod, a ditch ring sleeved with each lower cross rod is arranged at the lower end of each pull rod, the upper ends of the pull rods are fixedly connected with the upper cross rods, bottom plates are supported on the upper sides of the two lower cross rods, soft plates are arranged on the upper sides of the bottom plates, the upper sides of the soft plates are tightly attached to the bottom surfaces of the integral sand molds to block the downward hole openings of the integral sand molds, and the top surfaces of the integral sand molds are fixedly pressed with the; the method is characterized in that the coating treatment process specifically comprises the following steps:
A) plugging an orifice at the bottom of the integral sand mold through a plugging tool, adjusting the distance between two lower cross rods to be smaller than the contact overall dimension of the integral sand mold and a soft plate according to the dimension of the integral sand mold, sequentially arranging a bottom plate and the soft plate on the upper sides of the lower cross rods, hoisting the integral sand mold onto the soft plate through a hoisting tool and placing the integral sand mold in the center, correspondingly arranging an upper cross rod at the position, vertically opposite to the lower cross rods, on the top side of the integral sand mold, and tightly attaching the bottom plate and the soft plate to the surface of the integral sand mold through pull rods;
B) blocking the orifices of the sand mold vent holes, which are not communicated with the cavity, on the side surface of the whole sand mold and all the orifices, which are connected with the cavity and have the pore diameter of more than 10mm, by sand plugs;
C) hoisting the whole sand mold together with the plugging tool to a position above the dip-coating liquid level of the dip-coating pool by using a hoisting tool, and pouring a coating into the cavity from a maximum orifice at the top of the whole sand mold, which is communicated with the cavity, until the whole cavity and a pore passage communicated with the cavity are directly filled; then loosening the pull rod, and detaching the upper cross rod, the lower cross rod, the soft plate and the bottom plate to enable the coating to flow out of each orifice and fall back to the dip-coating pool;
D) rotating the whole sand mold for at least two circles along a central shaft corresponding to the hanging handle at a rotating speed of 1-2 revolutions/min under a hanging state so as to change the direction of each orifice communicated with the cavity, uniformly coating the coating in the cavity on the inner wall of the cavity and discharging the redundant coating along the corresponding orifice;
E) and transferring the whole sand mold after being coated to a baking device for baking treatment.
2. The method for coating the complex-structure casting integral sand mold according to claim 1, wherein external threads are arranged on the periphery of the upper end of the pull rod, a through hole is formed in the position, corresponding to the upper cross rod, of the pull rod, and the pull rod penetrates through the through hole and then is fastened through a gasket and a nut.
3. The pouring and coating method for the integral sand mold of the complex structure casting according to claim 1, wherein the soft plate is a foam soft plate with the thickness of 50-100 mm.
4. The pouring and coating method for the integral sand mold of the complex structure casting according to claim 1, wherein the Baume degree of the coating is 35-45.
5. The method for pouring and coating the complex structure casting integral sand mold according to claim 1, wherein the baking process in the step E) is as follows: the integral sand mold is firstly transferred into a surface drying kiln for baking at the baking temperature of 120 ℃ for 20-40 min, so that the coating is pre-dried, then the integral sand mold is transferred into a hot air baking furnace, a baking main air inlet enters from the largest cavity opening of the integral sand mold, the air outlet temperature of the hot air baking furnace is 60-110 ℃, and the baking time is 40-60 min.
6. The method for pouring and coating the integral sand mold of the complex structure casting according to claim 4, the integral sand mold is formed through 3D printing, a 3D printing model is firstly designed before 3D printing is carried out, a casting model is firstly modeled through three-dimensional modeling software, an exhaust system, a feeding system and a pouring system are designed on the casting model to complete the modeling of the model I, then drawing a square entity which can completely wrap the first model through three-dimensional modeling software, then obtaining the integral sand mold of the casting by using the entity of the first model to calculate the difference of the square entity, then a plurality of sand cleaning holes which are convenient for cleaning the blind hole parts of the cavity are arranged in the integral sand mould model, the core bar preformed hole which is used for increasing the strength of the weak part of the sand mould and is convenient for arranging the core bar is used for exhausting the sand mould and exhausting the exhaust hole which is not communicated with the cavity, and the final modeling of the whole sand mould model is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980152.0A CN109014083B (en) | 2018-08-27 | 2018-08-27 | Filling and coating method for integral sand mold of casting with complex structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980152.0A CN109014083B (en) | 2018-08-27 | 2018-08-27 | Filling and coating method for integral sand mold of casting with complex structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109014083A CN109014083A (en) | 2018-12-18 |
| CN109014083B true CN109014083B (en) | 2020-02-21 |
Family
ID=64625050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810980152.0A Active CN109014083B (en) | 2018-08-27 | 2018-08-27 | Filling and coating method for integral sand mold of casting with complex structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109014083B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109766634B (en) * | 2019-01-11 | 2023-04-18 | 徐州徐工矿业机械有限公司 | Mining large-scale steel casting digital forward research and development method |
| CN111054890B (en) * | 2019-12-09 | 2021-12-07 | 北京航星机器制造有限公司 | Manufacturing method of mold for 3D printing sand mold |
| CN111230049B (en) * | 2020-02-28 | 2021-10-12 | 江苏徐工工程机械研究院有限公司 | 3D printing-based integral hydraulic multi-way valve sand core casting process |
| CN113173484A (en) * | 2021-04-29 | 2021-07-27 | 共享智能铸造产业创新中心有限公司 | Sand mould hoisting structure |
| CN117862473B (en) * | 2024-03-11 | 2024-05-24 | 山西汉通鑫宇科技股份有限公司 | Sand removing device for cast pipe castings |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203495157U (en) * | 2013-07-01 | 2014-03-26 | 广西玉柴机器股份有限公司 | Device for reducing accumulation of paint in air passage of cylinder cover sand core assembly |
| CN103357818B (en) * | 2013-07-25 | 2016-04-13 | 山西宇达集团有限公司 | A kind of metastasis model method casting method |
| CN105964939A (en) * | 2016-06-02 | 2016-09-28 | 四川南车共享铸造有限公司 | Cylinder cover casting method |
| CN107243599A (en) * | 2017-05-10 | 2017-10-13 | 杨光 | A kind of resin-coated sand shell mould, which is filled, applies casting technique without dartlike weapon side technology |
| CN108262447B (en) * | 2018-03-14 | 2024-04-19 | 共享智能装备(安徽)有限公司 | Integrated clean-up equipment of whole core surplus sand of 3D printing |
-
2018
- 2018-08-27 CN CN201810980152.0A patent/CN109014083B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109014083A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109014083B (en) | Filling and coating method for integral sand mold of casting with complex structure | |
| KR100619196B1 (en) | Method for investment casting, investment casting shelling fixture and die | |
| CN107309406B (en) | Casting method adopting combined 3D printing shell mold | |
| CN106111943B (en) | Large-scale impeller low-pressure casting method and cooling control technique and exhaust system | |
| CN112589049B (en) | Precision casting process based on 3D printing pattern | |
| CN110434282B (en) | Mold, tooling and method for core molding of closed impeller sodium silicate sand | |
| CN104043786A (en) | Casting process of hydraulic main valve casting of 20-ton excavator | |
| CN103691890A (en) | Core manufacturing method of riser oil duct sand core during cylinder cover casting and cylinder cover casting method | |
| CN106470781A (en) | The improved method for manufacturing the shell mould with blade element producing aircraft turbine engine by lost-wax casting | |
| US3249972A (en) | Ceramic shell molds and methods of production | |
| CN105764659B (en) | For constructing the mould of coating products and for manufacturing the equipment of this coating products | |
| CN109676085B (en) | Molding method of shell casting sand mold | |
| CN112091177A (en) | Forming method of mold core | |
| CN108393438B (en) | Process device and production method for casting bearing cover castings by iron mold sand-lined vertical parting | |
| CN108927493A (en) | A kind of aluminium alloy electric automobile inner-cooled machine shell cast shaping process | |
| EP3047923B1 (en) | Investment technique for solid mold casting of reticulated metal foams | |
| CN1721206B (en) | Process of making low-melting point metal hollow artwork | |
| CN103302244A (en) | Flange casting die | |
| CN112517857B (en) | Casting method for eliminating top air holes of blind hole oil duct | |
| CN115921782A (en) | V-method molding method of double-sided mold | |
| CN113351828A (en) | Investment casting forming process for embedded ceramic core | |
| CN211135411U (en) | Cavity casting model for preventing lost foam residues | |
| CN210412415U (en) | Molding tool for casting sand riser sleeve | |
| US1776701A (en) | Mold for making vitreous china articles | |
| CN206811099U (en) | Coating feeding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |