CN111136224A - Method for fixing sand core on metal mold - Google Patents
Method for fixing sand core on metal mold Download PDFInfo
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- CN111136224A CN111136224A CN202010062509.4A CN202010062509A CN111136224A CN 111136224 A CN111136224 A CN 111136224A CN 202010062509 A CN202010062509 A CN 202010062509A CN 111136224 A CN111136224 A CN 111136224A
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- positioning column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/064—Locating means for cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to the technical field of die installation, and discloses a method for fixing a sand core on a metal die, which comprises the following steps: firstly, respectively extending a first positioning column, a second positioning column, a third positioning column, a fourth positioning column and a fifth positioning column of the sand core into a first positioning cavity, a left positioning hole, a third positioning cavity, a fourth positioning cavity and a fifth positioning cavity on a left die; step two, extending the opening end of the second sand core main body into a right positioning hole in the right die; step three, closing the left die and the right die, and adjusting the position of the sand core in the molding cavity to enable the dead head end of the sand core to be coaxial with the top limit opening of the molding cavity; and step four, fixing the sand core. The invention effectively solves the problem that the sand core fixing method of the universal mould cannot meet the requirement of casting and molding of the steering shell.
Description
Technical Field
The invention relates to the technical field of die installation, in particular to a method for fixing a sand core on a metal die.
Background
The sand core is one of the cores, and is formed by processing sand in a mold, so that the sand core has a certain shape and structure. When the sand core is used, the sand core is matched with the metal mold to form a molding cavity for molding a casting. When the product is cast, the casting and forming of the product can be finished only by pouring molten metal liquid into the molding cavity.
However, each core is specifically designed for a particular product and there are few cores that can be used universally. There is a guide housing for power steering transmission, in which a rotary shaft is connected to each of the vertical and horizontal directions, and power transmission of the two rotary shafts is facilitated. At present, the guide shell cannot be produced and processed domestically, and a sand core and a metal mold for producing and processing the guide shell are not provided, so that the research on the sand core and the metal mold is required to be finished, and the research on a fixing method of the sand core and the metal mold is required to be finished. However, the conventional method for fixing the sand core and the metal mold cannot meet the processing requirement of the steering shell.
Disclosure of Invention
The invention provides a method for fixing a sand core on a metal mold, which is used for solving the problem that the sand core fixing method of a general mold cannot meet the casting molding of a steering shell.
The invention relates to a method for fixing a sand core on a metal mold, wherein the sand core is provided with a first positioning column, a second positioning column, a third positioning column, a fourth positioning column and a fifth positioning column; the sand core comprises a first body and a second body; the second body has an open end; the top end of the first main body is a dead head end; the metal die comprises a left die and a right die; a left molding cavity is arranged on the right side of the left die, and a right molding cavity is arranged on the left side of the right die; when the left die and the right die are closed, the left plastic cavity and the right plastic cavity form a plastic cavity, and a top end limiting opening is formed at the top end of the plastic cavity; a first positioning cavity, a left positioning hole, a third positioning cavity, a fourth positioning cavity and a fifth positioning cavity are arranged on the left die and correspond to the first positioning column, the second positioning column, the third positioning column, the fourth positioning column and the fifth positioning column; a right positioning hole is formed in the right die corresponding to the opening end of the second main body; the fixing of the sand core to the metal mold comprises the following steps:
firstly, respectively extending a first positioning column, a second positioning column, a third positioning column, a fourth positioning column and a fifth positioning column of the sand core into a first positioning cavity, a left positioning hole, a third positioning cavity, a fourth positioning cavity and a fifth positioning cavity on a left die;
step two, extending the opening end of the second sand core main body into a right positioning hole in the right die;
step three, closing the left die and the right die, and adjusting the position of the sand core in the molding cavity to enable the dead head end of the sand core to be coaxial with the top limit opening of the molding cavity;
and step four, fixing the sand core.
The noun explains:
and (4) riser: refers to the supplementary part added above or on the side of the casting to avoid the casting from being defective, i.e. the part of the semi-finished product beyond the mold, generally at the two ends of the semi-finished product.
The method has the advantages that:
the method meets the positioning and fixing requirements of the sand core and the metal mold with the structure, the inner wall of the product shell can be formed by the sand core, the outer wall of the product shell can be formed by the molding cavity, and the whole product shell can be formed by casting by the sand core and the molding cavity.
When fixing the psammitolite, earlier fix a position the psammitolite on left mould through five reference columns, and through the compound die of left mould and right mould, can further adjust the position of psammitolite in moulding the type chamber through comparing the relative position of spacing mouth in top and cap end, make the psammitolite more accurate with the plasticity space that moulds the type chamber and form together to in order to produce more accurate product casing. After the position of the sand core is adjusted, the sand core is fixed, and the influence on the position of the sand core in the mold opening and closing process is avoided.
The invention effectively solves the problem that the sand core fixing method of the universal mould cannot meet the requirement of casting and molding of the steering shell.
Furthermore, in the first step, a third positioning column is firstly extended into the third positioning cavity; then after the fourth positioning column and the fifth positioning column are respectively aligned with the fourth positioning cavity and the fifth positioning cavity, the second positioning column extends into the left positioning hole; and finally, the fourth positioning column and the fifth positioning column respectively extend into the fourth positioning cavity and the fifth positioning cavity.
By the fixing method, the sand core can be quickly installed on the left die of the metal die on the premise of not damaging the sand core and the metal die.
Furthermore, the depth of the third positioning cavity is greater than the length of the third positioning column; in the first step, when the third positioning column extends into the third positioning cavity, the third positioning column extends into the third positioning cavity completely, and when the second positioning column is aligned with the left positioning hole, a part of the third positioning column is pulled out to adjust the relative position of the second positioning column and the left positioning hole.
Therefore, the operation is convenient to provide space for the connection of the second positioning column, the fourth positioning column and the fifth positioning column.
And further, in the third step, the top surface of the riser end of the sand core and the top surfaces of the left die and the right die are all positioned on a horizontal plane, and then the position of the sand core in the molding cavity is adjusted through horizontal movement.
The top surface of the end of the riser is a plane, and the top surfaces of the left die and the right die are also planes, so that the top surfaces of the end of the riser, the left die and the right die are ensured to be on a horizontal plane, and then the sand core is horizontally moved all around to enable the end of the riser to be coaxial with the top limiting port, so that the relative positions of the sand core and the metal die can be quickly and accurately adjusted.
Further, in step four, the sand core is fixed to the left mold.
After the position of the sand core is adjusted, the sand core is fixed on the left die, and because the relative position of the left die and the right die is close to or far away from the sand core along a linear track during die opening and die closing, the sand core is fixed on the left die, so that the position of the sand core can be fixed, the position deviation caused in the die opening and closing process is avoided, and the die opening and closing of the left die and the right die are not influenced. Meanwhile, the number of the positioning cavities on the left die is far more than that of the positioning cavities on the right die, so that the sand core can be completely and firmly fixed.
Furthermore, threaded holes which penetrate through the outer side of the left die are respectively formed in the circumferential positions corresponding to the first positioning cavity, the left positioning hole and the third positioning cavity; in the fourth step, the first positioning column extending into the first positioning cavity, the second positioning column extending into the left positioning hole and the third positioning column extending into the third positioning cavity are fixed through screws penetrating through the threaded holes.
The first positioning column, the second positioning column and the third positioning column are located on two different faces, and in addition, the horizontal planes aligned with the emitting ends are provided with three faces capable of being determined, and the whole sand core can be fixed by fixing the three positioning columns. Meanwhile, each positioning column is fixed by a screw extending from the outer side, and the sand core is fixed while the casting molding in the plastic cavity is not influenced.
Furthermore, at least three threaded holes in the same circumference are formed in the circumferential directions of the first positioning cavity, the left positioning hole and the third positioning cavity respectively.
Therefore, at least three screws are arranged on the same circumference for fixing each positioning column, and the purpose of firm connection can be achieved.
Furthermore, threaded holes penetrating through the outer side of the left die are formed in the circumferential positions of the fourth positioning cavity and the fifth positioning cavity respectively, and the fourth positioning column and the fifth positioning column are fixed through screws extending into the threaded holes respectively.
This enables the entire core and metal mold to be more firmly connected.
Furthermore, in the fourth step, the first positioning column, the second positioning column and the third positioning column are fixed, and then the fourth positioning column and the fifth positioning column are fixed.
The position of the sand core is fixed through the first positioning column, the third positioning column and the fourth positioning column, and the fifth positioning column and the fourth positioning column are fixed, so that the connection between the sand core and the left mold is further enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a metal mold according to a first embodiment of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a schematic structural diagram of a sand core in the first embodiment of the present invention.
Fig. 5 is another schematic structural diagram of the sand core in the first embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the positioning device comprises a front push plate 1, a left push plate 2, a left die 3, a shell 4, a sand core 5, a cover 6, a rear push plate 7, a right push plate 8, a track 9, a base 10, a lower push plate 11, a bottom plate 12, a first main body 21, a second main body 22, a first positioning column 210, a connecting ring 211, a second positioning column 221, an opening end 222, a third positioning column 223, a fourth positioning column 224 and a fifth positioning column 225.
Example one
The metal mold used in this embodiment includes a left mold 3 and a right mold, which are installed right and left, as shown in fig. 1, 2, and 3. The right side of the left die 3 is provided with a left plastic cavity, and the upper side, the lower side and the right side of the left plastic cavity are provided with openings for matching and completing the casting forming of the outer surface of the left side of the shell 4. And a right molding cavity is formed in the left side surface of the right mold, and the upper side, the lower side and the left side of the right molding cavity are provided with openings for matching and completing casting forming of the outer surface of the right side of the shell 4. When the left die 3 and the right die are closed, the left molding cavity and the right molding cavity are closed to form a complete molding cavity which is used for completing the casting and forming of the outer surface of the shell 4.
And mounting holes for mounting the sand core 5 are respectively formed in the left die 3 and the right die. The sand core 5 is provided with a plurality of positioning columns, and the positioning columns correspond to the mounting holes one to one. During installation, the sand core 5 respectively penetrates through corresponding installation holes in the left die 3 and the right die through the positioning columns, so that the sand core 5 is positioned in a plastic cavity formed by closing the left die 3 and the right die, and an inner cavity of the shell 4 is formed through the sand core 5.
The periphery of the left die 3 and the right die is respectively provided with a front push plate 1, a left push plate 2, a rear push plate 7 and a right push plate 8 which are used for pushing and pressurizing the left die 3 and the right die. Be connected with the left connecting plate of two vertical installations between left push pedal 2 and the left mould 3, two left connecting plates set up along the perpendicular bisector symmetry of left mould 3 fore-and-aft direction. Similarly, two right connecting plates are arranged between the right die and the right push plate 8, and the two right connecting plates are also symmetrically arranged along the perpendicular bisector in the front-back direction of the right die.
Two left front push rods which are arranged up and down are arranged between the front push plate 1 and the left die 3, and two right front push rods which are arranged up and down are arranged between the front push plate 1 and the right die. Two left rear push rods which are arranged up and down are arranged between the rear push plate 7 and the left die 3, and two right rear push rods which are arranged up and down are arranged between the rear push plate 7 and the right die.
A base 10 is arranged below the left die 3 and the right die, two rails 9 are embedded on the base 10, and the longitudinal section of each rail 9 is in a convex structure. The bottom of left mould 3 and right mould all opens the spout that has corresponding track 9, through the spout, can make left mould 3 and right mould remove about along track 9. Promote left push pedal 2 and right push pedal 8 through power unit, make left push pedal 2 promote left mould 3, make right push pedal 8 promote right mould, make left mould 3 pass through the spout along track 9 horizontal slip, make right mould pass through the spout along track 9 horizontal slip, make left mould 3 and right mould be close to the compound die each other, make left mould 3 and right mould can part the die sinking each other.
Install the posterior lateral plate on the trailing flank of left mould 3 and right mould, integrated into one piece has the bellied installation piece of upwards on the top of posterior lateral plate, has lid 6 through pin joint on the installation piece, and lid 6 can be opened and close. When the cover 6 is closed forwards, the cover 6 covers the shell 4 and the sand core 5, and the cover 6 and the left mould 3 and the right mould can form a space for molding the shell 4.
A lower push plate 11 and a bottom plate 12 are arranged below the base 10, the lower push plate 11 is positioned above the bottom plate 12, four push rods extending upwards are arranged on the top surface of the lower push plate 11, and the push rods penetrate through the base 10 and are in contact with the shell 4 above the base 10. Lower push plate 11 and bottom plate 12 are all square block structure, and four ejector pins evenly distributed are in lower push plate 11's four corners, and this makes things convenient for the ejector pin can evenly upwards promote casing 4, makes cast molding's casing 4, can be followed the top of moulding the type chamber and released. Four evenly distributed feet are mounted on the bottom surface of the base plate 12 for supporting the base plate 12 and the entire casting machine apparatus.
As shown in fig. 4 and 5: the sand core 5 used in this embodiment includes a first body 21 vertically installed and a second body 22 horizontally installed, and the second body 22 is located at the lower end of the first body 21 and is connected to the second body 22 by a connection ring 211 integrally formed at the bottom of the first body 21. The first body 21 and the second body 22 are both sand cast cylinders.
A first positioning column 210 extending outward in the radial direction is integrally formed on the circumferential surface of the first main body 21, the first positioning column 210 is a circular truncated cone structure, and the diameter of the first positioning column 210 gradually decreases from the position connected with the first main body 21 to the direction away from the first main body 21. Such a configuration of the first positioning post 210 facilitates the quick contact of the sand core 5 of the housing 4 with the metal mold for use in cooperation with the sand core 5 of the housing 4 through the first positioning post 210. The first positioning post 210 is installed at a position spaced apart from the top end of the first body 21 by a third of the length of the entire first body 21.
The top end of the first main body 21 is a flat top, and is a top end extending out of the metal mold and used for contacting with a power mechanism such as a cylinder.
A second positioning post 221 is integrally connected to the left end of the second main body 22, the direction of the second positioning post 221 extending outward is the same as the first positioning post 210, but the length of the second positioning post 221 is between one fourth and one half of the length of the first positioning post 210, and when the length of the second positioning post 221 is one third of the length of the first positioning post 210, the positioning effect is the best. And different from the structure of the first positioning column 210, the second positioning column 221 is a cylinder with an equal diameter.
The right end of the second body 22 is an open end 222, and a mounting groove is formed at the right end of the second body 22 to the left, through which the end cap of the guide housing 4 to be processed is brought into contact. The notch of mounting groove is circular, and the degree of depth of mounting groove is less than second main part 22 one-half of length, and the optimum degree of depth of mounting groove is second main part 22 one-third of length, and the processing of the 4 end covers of direction casing is most convenient this moment.
The length of the whole second main body 22 (including the length of the second positioning post 221) is one quarter to three quarters of the length of the first main body 21, and when the length of the second main body 22 is one half of the length of the first main body 21, the most common tool for machining the guide housing 4 is provided.
A third positioning column 223, a fourth positioning column 224, and a fifth positioning column 225 are integrally formed and installed outward at circumferential positions of the connecting ring 211, respectively. The fourth positioning column 224 and the fifth positioning column 225 are vertically arranged at the same side position of the connecting ring 211, and the extending directions of the fourth positioning column 224 and the fifth positioning column 225 are the same. Third positioning column 223 is on the other side of fourth positioning column 224 and fifth positioning column 225, and in the vertical direction, third positioning column 223 is located between fourth positioning column 224 and fifth positioning column 225. The third positioning column 223, the fourth positioning column 224 and the fifth positioning column 225 are all installed horizontally, the third positioning column 223 is located in the diameter direction of the connecting ring 211 and the second main body 22, and the connecting ring 211 and the second main body 22 are coaxial.
With the sand core 5 and the metal mold of the above structure, in mounting the sand core 5 to the metal mold, fixing is performed by:
first, the metal mold is mounted on a casting machine: the base 10 is installed on the casting machine by the existing method, and the base 10 is fixed on the frame of the casting machine by screws; the base plate 12 is also fixed to the casting machine by screws; the lower push plate 11 is connected with an oil cylinder on a casting machine through a connecting bolt, so that the metal grinding tool cannot fall off from the casting machine, and the oil cylinder can push the lower push plate 11 to move;
secondly, installing the sand core 5 on a metal mold;
the top ends of the left molding cavity and the right molding cavity respectively arranged on the left mold 3 and the right mold of the metal mold are top end limiting openings used for limiting the cap opening of the shell 4 when being closed, and the top end limiting openings are cylindrical in the embodiment.
A first positioning cavity matched with the first positioning column 210 in shape, a second positioning cavity matched with the second positioning column 221 and the second main body 22 in shape and a connecting ring 211 left side limiting cavity matched with the structural shape of the left side part of the connecting ring 211 are formed in the left plastic cavity, a third positioning cavity for a third positioning column 223 to pass through is communicated with the front side of the connecting ring 211 left side limiting cavity, and a fourth positioning cavity and a fifth positioning cavity for a fourth positioning column 224 and a fifth positioning column 225 to pass through are communicated with the rear side of the connecting ring 211 left side limiting cavity; a left positioning hole for the second positioning column 221 to extend into is formed in the left side of the left limiting cavity of the connecting ring 211.
The right molding cavity is provided with a right limiting cavity of the connecting ring 211 corresponding to the right part of the connecting ring 211 and the opening end 222 of the second main body 22, and the right side of the right limiting cavity of the connecting ring 211 is provided with a right positioning hole for the opening end 222 of the second main body 22 to extend into; except for the left positioning hole and the right positioning hole, the left limiting cavity of the connecting ring 211 and the right limiting cavity of the connecting ring 211 are not in contact with the outer sides of the second main body 22 and the connecting ring 211, and the distance between the outer sides of the second main body 22 and the connecting ring 211 and the left limiting cavity of the connecting ring 211 and the right limiting cavity of the connecting ring 211 respectively is the wall thickness of the shell 4 at the position.
It should be noted that the depth of the third positioning cavity is greater than the length of the third positioning column 223, so that the positioning column can have a space for jumping when extending into the positioning cavity.
When the sand core 5 is installed, the third positioning column 223 extends into the third positioning cavity, and the positions of the fourth positioning column 224 and the fifth positioning column 225 are adjusted, so that the fourth positioning column 224 and the fifth positioning column 225 are respectively aligned with the fourth positioning cavity and the fifth positioning cavity at the same time; then, the second positioning column 221 extends into the left positioning hole, the fourth positioning column 224 extends into the fourth positioning cavity, and the fifth positioning column 225 extends into the fifth positioning cavity; the whole sand core 5 is hung on the left die 3, and a cavity space for casting the shell 4 is formed between the left molding cavity of the left die 3 and the sand core 5.
Finally, the opening end 222 of the second main body 22 extends into the right positioning hole of the right molding cavity, and the left mold 3 and the right mold are closed, so that the riser end of the sand core 5 is positioned in the middle position of the top limit ports of the left molding cavity and the right molding cavity, even if the circular cross section of the riser end is concentric with the circular cross section of the top limit port, the plastic space formed by the molding cavity and the sand core 5 can be ensured to be uniform, namely, the wall thickness of the same circumference of the cast shell 4 is ensured to be uniform.
After the position of the sand core 5 is adjusted, the positions of the positioning columns extending into the positioning cavities are fixed through the threaded holes formed in the outer side of the metal mold and the screws. The screws are generally arranged along the circumference of the positioning cavity, so that each positioning column extending into the positioning cavity can be stably fixed in the circumference direction.
And these screws and screw holes are all installed on left mould 3, so can enough play psammitolite 5 fixed position, can not influence opening and shutting of left mould 3 and right mould again.
Finally, after the sand core 5 is installed, the installation and debugging of other structures of the metal mold are completed; install mould bottom plate 12 and left, right, preceding, back push pedal 7 at left mould 3 and right mould periphery in proper order: the bottom plate 12 is first installed in place and bolted down, and then left and right mold connecting bolts are hung. Opening the die and closing the die for three times. After the die is closed in place, fastening the connecting bolts of the left die and the right die; and then the connecting bolts of the front and the rear push plates 7 are hung. In the state that the left and right dies are closed, the front push plate 1 is jogged (the left and right dies guide the front push plate 1). After the front push plate 1 is in place, the front push plate 1 is fastened to connect with the bolt. Half-opening the front push plate 1, checking whether the gaps between the front push plate 1 and the periphery of the left die and the right die are consistent, and if the gaps are consistent, installing the front push plate 1 to be qualified. If the peripheral gaps of the front push plate 1 are not consistent, the front push plate 1 is adjusted until the peripheral gaps are consistent; the rear push plate 7 is installed in sequence.
Example two
In this embodiment, the first positioning cavity, the left positioning hole and the third positioning cavity respectively have at least two fixing positions in respective axial directions. At least three threaded holes extending into the positioning cavity or the positioning hole from the outer side of the left die 3 are formed in the circumference of each fixing position, and the screws connected into the threaded holes can abut against the positioning columns from the axial direction in each fixing position so as to clamp the positioning columns. In this embodiment, first locating cavity and left locating hole all have two locating position, all communicate on every locating position to have three screw hole. The three screw holes of first positioning cavity include from last screw hole that down vertically runs through, the second screw hole that the level runs through backward from the past to and the third screw hole that the level runs through forward backward from the past. The threaded hole of each locating position on the left locating hole comprises a threaded hole vertically penetrating from bottom to top, a second threaded hole horizontally penetrating from the front to the back, and a third threaded hole horizontally penetrating from the back to the front. Likewise, the threaded holes in the circumferential direction of the third positioning cavity are all horizontally or vertically penetrated, which is beneficial for horizontally or vertically installing the screw, so that the screw can better clamp the positioning column by the contact surface of the end part of the screw.
EXAMPLE III
In addition to the threaded holes which are horizontally and vertically distributed and used for fixing the positioning columns, the positioning column also has threaded holes which are obliquely arranged. Specifically, three inclined threaded holes are respectively penetrated from the outer side on the same circumference on the fourth positioning cavity and the fifth positioning cavity. The positions of the joints of the three inclined threaded holes and the positioning cavity are on the same circumference. The threaded holes on the outer sides of the fourth positioning cavity and the fifth positioning cavity are obliquely penetrated through at an angle of 45 degrees with the vertical plane. Therefore, the positioning function can be achieved, the processing of the threaded holes is facilitated, and the inconvenience caused by the fact that the plurality of screws are connected with the surfaces and the length of the screws is too long is avoided.
Example four
In this embodiment, the same positioning cavity has both the positioning positions formed by the threaded holes in the vertical and horizontal directions and the positioning positions formed by the threaded holes in the oblique direction. This enables each locating post to be more firmly fixed.
EXAMPLE five
In this embodiment, all only the screw hole that the slope set up on location chamber and the locating hole. The inclined threaded holes in the first positioning cavity and the left positioning hole respectively penetrate through the first positioning cavity and the left positioning hole from the left side face of the left die 3, and the included angle between each threaded hole and the left side face is any one or more of 30 degrees, 45 degrees and 60 degrees.
The descriptions in the above embodiments and the like can be used to explain the contents of the claims.
Claims (9)
1. The method for fixing the sand core on the metal mold is characterized in that the sand core is provided with a first positioning column, a second positioning column, a third positioning column, a fourth positioning column and a fifth positioning column; the sand core comprises a first body and a second body; the second body has an open end; the top end of the first main body is a dead head end; the metal die comprises a left die and a right die; a left molding cavity is arranged on the right side of the left die, and a right molding cavity is arranged on the left side of the right die; when the left die and the right die are closed, the left plastic cavity and the right plastic cavity form a plastic cavity, and a top end limiting opening is formed at the top end of the plastic cavity; a first positioning cavity, a left positioning hole, a third positioning cavity, a fourth positioning cavity and a fifth positioning cavity are arranged on the left die and correspond to the first positioning column, the second positioning column, the third positioning column, the fourth positioning column and the fifth positioning column; a right positioning hole is formed in the right die corresponding to the opening end of the second main body; the fixing of the sand core to the metal mold comprises the following steps:
firstly, respectively extending a first positioning column, a second positioning column, a third positioning column, a fourth positioning column and a fifth positioning column of the sand core into a first positioning cavity, a left positioning hole, a third positioning cavity, a fourth positioning cavity and a fifth positioning cavity on a left die;
step two, extending the opening end of the second sand core main body into a right positioning hole in the right die;
step three, closing the left die and the right die, and adjusting the position of the sand core in the molding cavity to enable the dead head end of the sand core to be coaxial with the top limit opening of the molding cavity;
and step four, fixing the sand core.
2. The method of claim 1, wherein in step one, a third positioning post is first extended into the third positioning cavity; then after the fourth positioning column and the fifth positioning column are respectively aligned with the fourth positioning cavity and the fifth positioning cavity, the second positioning column extends into the left positioning hole; and finally, the fourth positioning column and the fifth positioning column respectively extend into the fourth positioning cavity and the fifth positioning cavity.
3. The method of setting a sand core in a metal mold as claimed in claim 2, wherein the depth of the third positioning cavity is greater than the length of the third positioning post; in the first step, when the third positioning column extends into the third positioning cavity, the third positioning column extends into the third positioning cavity completely, and when the second positioning column is aligned with the left positioning hole, a part of the third positioning column is pulled out to adjust the relative position of the second positioning column and the left positioning hole.
4. The method of claim 1, wherein in step three, the top surface of the riser end of the core and the top surfaces of the left and right molds are positioned on a horizontal plane, and then the position of the core in the molding cavity is adjusted by moving horizontally.
5. The method of setting a sand core in a metal mold as set forth in claim 1, wherein the sand core is set in the left mold in the fourth step.
6. The method for fixing a sand core to a metal mold as claimed in claim 5, wherein threaded holes are provided through the outer side of the left mold at positions corresponding to the circumferential positions of the first positioning cavity, the left positioning hole and the third positioning cavity, respectively; in the fourth step, the first positioning column extending into the first positioning cavity, the second positioning column extending into the left positioning hole and the third positioning column extending into the third positioning cavity are fixed through screws penetrating through the threaded holes.
7. The method of setting a sand core in a metal mold as claimed in claim 6, wherein at least three threaded holes are provided in the same circumference in the circumferential direction of the first positioning cavity, the left positioning hole and the third positioning cavity, respectively.
8. The method for fixing a sand core to a metal mold as claimed in claim 7, wherein threaded holes are formed in the fourth positioning cavity and the fifth positioning cavity in circumferential directions, respectively, so as to penetrate from the outer side of the left mold, and the fourth positioning column and the fifth positioning column are fixed by screws inserted into the threaded holes, respectively.
9. The method for fixing a sand core to a metal mold as claimed in claim 8, wherein in the fourth step, the first positioning column, the second positioning column and the third positioning column are fixed, and then the fourth positioning column and the fifth positioning column are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062509.4A CN111136224B (en) | 2020-01-19 | 2020-01-19 | Method for fixing sand core on metal mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062509.4A CN111136224B (en) | 2020-01-19 | 2020-01-19 | Method for fixing sand core on metal mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111136224A true CN111136224A (en) | 2020-05-12 |
| CN111136224B CN111136224B (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500168A (en) * | 2021-05-20 | 2021-10-15 | 重庆万斯金属特种成形有限公司 | Die for casting manifold |
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| CN110026531A (en) * | 2019-04-12 | 2019-07-19 | 上海华新合金有限公司 | A kind of the lock pin header structure and its core manufacturing craft of combustion row shell casting coremaking |
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| CN202591548U (en) * | 2012-04-28 | 2012-12-12 | 宁波敏宝卫浴五金水暖洁具有限公司 | Metal gravity casting mold |
| CN203599478U (en) * | 2013-10-23 | 2014-05-21 | 徐水县兴华铸造有限公司 | Sand core, metal die and metal casting equipment |
| CN203887167U (en) * | 2014-06-13 | 2014-10-22 | 邻水县薪宇机械制造有限公司 | Casting mould for gearbox shell of mini-tiller |
| CN104550758A (en) * | 2015-01-08 | 2015-04-29 | 贵州红林机械有限公司 | Sand core positioning structure in metal type casting mold |
| KR20180040879A (en) * | 2016-10-13 | 2018-04-23 | 동양피스톤 주식회사 | Salt cores for piston of the engine oil gallery formed |
| KR20180041933A (en) * | 2016-10-17 | 2018-04-25 | 동양피스톤 주식회사 | Salt core support structure |
| CN109332597A (en) * | 2018-10-18 | 2019-02-15 | 四川省犍为恒益铝业有限公司 | A kind of the sand core mounting structure and its installation method of automobile-used cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500168A (en) * | 2021-05-20 | 2021-10-15 | 重庆万斯金属特种成形有限公司 | Die for casting manifold |
| CN113500168B (en) * | 2021-05-20 | 2023-02-28 | 重庆万斯金属特种成形有限公司 | Die for casting manifold |
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| CN111136224B (en) | 2021-11-19 |
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