CN112317715A - Pouring process for nodular cast iron production - Google Patents
Pouring process for nodular cast iron production Download PDFInfo
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- CN112317715A CN112317715A CN202011197848.XA CN202011197848A CN112317715A CN 112317715 A CN112317715 A CN 112317715A CN 202011197848 A CN202011197848 A CN 202011197848A CN 112317715 A CN112317715 A CN 112317715A
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- pouring
- cast iron
- nodular cast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
- B22D13/023—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/108—Removing of casting
Abstract
The invention provides a pouring process for ductile cast iron production, wherein a pouring device comprises a base, wherein a displacement mechanism, a pouring bin, a pouring mold, a motor and a connecting seat are sequentially arranged on the base; the pouring device for nodular cast iron production can enable pouring liquid to be uniformly poured onto the inner surface of a pouring mold, single-point impact of the molten liquid is avoided, the service life of the pouring mold is prolonged, the inner surface of a poured nodular cast iron pipe can be smoothed, the inner surface of the nodular cast iron pipe is ensured to be smooth and flat, the quality of the nodular cast iron pipe is improved, the formed nodular cast iron pipe can be conveniently lifted, and demolding is facilitated.
Description
Technical Field
The invention relates to the technical field of nodular cast iron, in particular to a pouring process for nodular cast iron production.
Background
The ductile iron is a high-strength cast iron material developed in the 20 th century and the fifties, the comprehensive performance of the ductile iron is close to that of steel, and the ductile iron is successfully used for casting parts which are complex in stress and high in requirements on strength, toughness and wear resistance based on the excellent performance of the ductile iron; spheroidal graphite cast iron has rapidly developed into a very widely used cast iron material second only to gray cast iron; the term "steel is replaced by iron" mainly refers to nodular cast iron;
the Chinese patent discloses a centrifuge special for casting ductile cast iron pipes, with the patent application number of CN201621484921.0, comprising a centrifuge main machine, and a mold roller clamping device, a mold drawing roller device, a mold sealing device and a water cooling device which are arranged in the centrifuge main machine. The utility model has the advantages of reasonable structural design, reliable performance, stable high-speed rotation of the die, good water circulation cooling effect, quick molding of the nodular cast iron pipe, safe application, convenient operation and maintenance and high working efficiency;
although the device has good water circulation cooling effect and the nodular cast iron pipe is molded quickly, when the nodular cast iron pipe is cast, the casting liquid is always cast to a fixed position inside the casting mold, the casting mold is damaged due to long-term impact of the molten liquid, the inner surface of the nodular cast iron pipe is not smooth enough after molding, and the nodular cast iron pipe is inconvenient to unload and ship after molding.
Disclosure of Invention
The invention aims to provide a pouring process for nodular cast iron production, which can ensure that pouring liquid is uniformly poured onto the inner surface of a pouring mold, avoid single-point impact of the molten liquid, prolong the service life of the pouring mold, smooth the inner surface of a poured nodular cast iron pipe, ensure the smoothness and flatness of the inner surface of the nodular cast iron pipe, improve the quality of the nodular cast iron pipe, facilitate the hoisting of the molded nodular cast iron pipe and facilitate demolding.
The invention provides a pouring process for nodular cast iron production, which comprises the following steps:
s1: collecting and melting the raw materials for pouring the nodular cast iron at high temperature, stirring, uniformly mixing the raw materials, and placing the mixture in a heat-insulating barrel for heat-insulating treatment to obtain pouring liquid;
s2: arranging the inner lining of the pouring device on the inner surface of the pouring mold, respectively closing and sealing the front end cover and the rear end cover on the fine mechanism of the pouring mold from two sides of the pouring mold, heating the pouring liquid obtained in S1, pouring the heated pouring liquid into a pouring bin, guiding the heated pouring liquid into the pouring mold from the pouring bin, and starting the pouring device to obtain the nodular cast iron pipe;
s3: collecting the nodular cast iron pipes produced by the pouring device in the S2, carrying out quality inspection on the collected nodular cast iron pipes, packaging the qualified nodular cast iron pipes, and putting the unqualified nodular cast iron pipes in the heat-insulating barrel again after high-temperature melting for recycling;
the pouring device in the S2 comprises a base, wherein a displacement mechanism, a pouring bin, a pouring mold, a motor and a connecting seat are sequentially arranged on the base, the displacement mechanism is arranged on one side of the outer surface of the upper end of the base, the pouring bin is fixedly arranged at the upper end of the displacement mechanism, the pouring mold is movably arranged in the middle of the outer surface of the upper end of the base, the motor is movably arranged on the other side of the outer surface of the upper end of the base, and the connecting seat is movably arranged between the motor and the pouring mold;
the casting die comprises a front end cover, a rear end cover, a fixed screw rod, a fixed nut, an inner lining, a first fixed hole, a hoisting mechanism and a second fixed hole, wherein the front end cover and the rear end cover are respectively and movably arranged on two sides of the casting die;
the displacement mechanism comprises a sliding groove, a pulley, a support rod and a hydraulic press, the hydraulic press is movably installed on one side of the outer surface of the upper end of the base, the sliding groove is formed in the outer surface of the upper end of the base and is located in the middle position between the hydraulic press and the pouring mold, the pulley is slidably installed in the sliding groove, the support rod is movably installed at the upper end of the pulley, the upper end of the support rod is fixedly connected with the pouring bin, and the hydraulic press is movably connected with the support rod.
When the casting device works, firstly, the lining is arranged on the inner surface of the casting mold, then the front end cover and the rear end cover are respectively sealed from the two sides of the casting mold in a closed manner, then, the casting liquid is poured into the casting bin and is guided into the casting mold from the casting bin, at the moment, the motor is switched on, the motor drives the casting mold to rotate through the connecting seat, the casting liquid is uniformly dispersed to the inner wall of the casting mold and is cooled and molded through the centrifugal force generated when the casting mold rotates, a tubular casting blank is formed, the thickness of the molded casting blank is gradually increased along with the gradual injection of the casting liquid until the casting blank reaches the required casting requirement, as the casting liquid is sprayed at a fixed position all the time after entering the casting mold during the casting, the temperature of the casting liquid is high, the casting mold can be damaged due to long-term impact, the risk of the leakage of the casting liquid is caused, at, thereby make the even pouring of casting liquid at the inner wall of casting die, during the pouring, promote the bracing piece through the hydraulic press, the bracing piece is thought forest one side to move by one side along the spout through lower extreme pulley, because fixed connection between pouring storehouse and the bracing piece, along with the removal of bracing piece, pouring storehouse page or leaf drives the pouring tube and is moved by the inside one side to the opposite side of casting die, after the mouth of pipe of pouring tube moved to the inside opposite side of casting die, the hydraulic press is again with the bracing piece pullback, make the pouring tube have the inside opposite side of casting die to move to one side, so circulate, cooperation casting die self pivoted phenomenon, make the pouring liquid can be even pouring at the inner wall of casting die, avoid the casting liquid to form single-point impact and destroy the casting die, the life of casting die has been improved.
Preferably, the lower end of the outer surface of one side of the pouring bin close to the pouring mold is provided with an integrally formed pouring tube, the pouring tube penetrates through the inside of the pouring mold, the outer surfaces of the upper end and the lower end of the pouring tube are fixedly provided with a flattening mechanism close to one side of the pouring mold, the flattening mechanism comprises a flattening plate, a fixing rod, a reinforcing rod, a telescopic rod, a positioning hole and a positioning bolt, the telescopic rod is fixedly arranged on one side of the upper end and the lower end of the pouring tube close to the pouring mold, the fixing rod is sleeved on the outer surface of the telescopic rod, the positioning hole is arranged on the outer surfaces of the two sides of the telescopic rod and the fixing rod, the positioning bolt penetrates through the inside of the positioning hole, the reinforcing rod is fixedly arranged between the front end and the rear end of the outer surface of.
In the casting process, the nodular cast iron pipe is formed by cooling the casting liquid under the action of centrifugal force, so that after the nodular cast iron pipe is molded, the inner surface of the nodular cast iron pipe is uneven, in order to ensure the molding quality of the nodular cast iron pipe, the inner surface of the nodular cast iron pipe can be smoothed by the smoothing mechanism, the thickness of the molded casting blank is gradually increased along with the gradual injection of the casting liquid, when the required casting requirement is met, the inner wall of the nodular cast iron pipe is contacted with the smoothing plate, the inner wall of the nodular cast iron pipe is smoothed by the rotation of the casting mold and matching with the circular arc shape of the smoothing plate, and the smoothing mechanism is matched with the displacement mechanism to move back and forth along with the casting pipe in the casting mold, so that the smoothing range is expanded, the whole inner surface of the nodular cast iron pipe can be smoothed, the inner surface of the nodular cast iron pipe is smooth and flat, and the molding quality of the, meanwhile, the fixing rod on the flattening mechanism can be sleeved on the telescopic rod to move up and down, so that the flattening mechanism can be adjusted according to the thickness of the nodular cast iron pipe poured as required, the nodular cast iron pipe flattening mechanism can be suitable for the nodular cast iron pipe flattening work with different thicknesses, after the distance between the fixing rod and the telescopic rod is adjusted, the fixing rod is aligned with the positioning hole in the telescopic rod, then the positioning bolt penetrates into the positioning hole to fix the fixing rod and the telescopic rod, and the reinforcing rods at the front end and the rear end of the flattening plate increase the stability of the flattening plate.
Preferably, the inside winding of pouring tube has the heater strip, the front end housing is close to one side surface intermediate position fixed mounting of pouring mould and has the scraping ring, and the scraping ring wraps up the pouring tube, the scraping ring is close to one side surface of pouring mould and is the scarf.
Because when casting liquid is leading-in pouring mould inside, can lead to partial casting liquid to be spattered the surface of pouring tube because of assaulting, these casting liquids can increase the diameter of pouring tube if cooling shaping, influence the removal of pouring tube, heat the pouring tube through the inside heating wire of pouring tube this moment, ensure that attached to the casting liquid on pouring tube surface can not cooling shaping, simultaneously along with the pouring tube by the other side of the temporal part of pouring mould to one side when removing, can contact with the scraping ring on the front end cover, utilize the scraping ring can scrape down the casting liquid of attached to pouring tube surface, the cleanness of pouring tube has been ensured.
Preferably, the handling mechanism includes side shield, end shield, locating pin, rings and recess, side shield fixed mounting is around one side surface of rear end housing, one side between adjacent side shield is shielded in end shield movable mounting, locating pin threaded connection is between side shield and end shield, rings fixed mounting is in the opposite side surface intermediate position of rear end housing, the recess is seted up in one side surface intermediate position of connecting seat, rings run through in the inside of recess.
Because the nodular cast iron pipe is embedded in the casting mold after being molded, the nodular cast iron pipe is tubular and is not easy to lift, meanwhile, the adsorption force exists between the ductile cast iron pipe and the inner wall of the casting mold, so that the ductile cast iron pipe is difficult to take out from the casting mold, the bottom baffle is fixed at one side between the side baffles by the positioning pin, so that the lifting mechanism is combined with the rear end cover to form a cylindrical grid, then the hoisting mechanism is plugged into the casting mold to form the nodular cast iron pipe in the hoisting mechanism, after the casting is finished and the nodular cast iron pipe is cooled and formed, the connecting seat and the rear end cover are disassembled, then the hoisting mechanism is hoisted through the hoisting ring on the rear end cover, so that the nodular cast iron pipe is taken out from the casting mold, then the positioning pin is disassembled, the bottom baffle plate is disassembled from the side baffle plate, the nodular cast iron pipe can be taken out from the hoisting mechanism, and the molded nodular cast iron pipe is convenient to unload.
Preferably, the hoisting mechanism further comprises clamping grooves, the clamping grooves are formed in the periphery of the inner surface of the lining, the clamping groove side baffles are the same in number and are clamped in the clamping grooves, and the clamping grooves and the side baffles are T-shaped.
When the hoisting mechanism is plugged into the casting mold, the side baffle is clamped into the clamping groove in the lining, the side baffle and the clamping groove are trapezoidal, the side baffle is prevented from being separated from the clamping groove, the side baffle is assembled with the lining to form a plane after being clamped into the clamping groove, the outer surface of the cast nodular cast iron pipe is ensured to be relatively flat, and the part of the cast nodular cast iron pipe is attached to the lining, the other part of the cast nodular cast iron pipe is attached to the side baffle, and the lining and the side baffle can be relatively displaced, so that the molded nodular cast iron pipe can be conveniently demoulded.
Preferably, the outer surface of one end, close to the rear end cover, of the side baffle is an arc-shaped concave surface, and the outer surface of one end, close to the rear end cover, of the side baffle is provided with a polishing piece.
The outer surface of the nodular cast iron pipe is provided with burrs after the nodular cast iron pipe is molded, the outer surface of the nodular cast iron pipe needs to be polished in order to guarantee the quality of the nodular cast iron pipe, the hoisting mechanism hoists the nodular cast iron pipe to be separated from a casting die, the bottom baffle is disassembled, the side baffle can rotate through the rear end cover, the contact surface of the side baffle and the nodular cast iron pipe is an arc concave surface, so that the side baffle and the nodular cast iron pipe are attached more tightly, meanwhile, the contact surface of the side baffle and the nodular cast iron pipe is provided with a polishing piece, the surface of the nodular cast iron pipe can be polished when the side baffle rotates, the surface of the nodular cast iron pipe is smooth, the polishing process is not needed to be additionally added, the molding quality of the nodular cast iron pipe is guaranteed.
Advantageous effects
1. Because the casting liquid is sprayed at a fixed position all the time after entering the casting mold during casting, the temperature of the casting liquid is high, the casting mold can be damaged due to long-term impact, and the risk of leakage of the casting liquid is caused, at the moment, the casting position of the casting liquid can be adjusted through the displacement mechanism, so that the casting liquid is uniformly cast on the inner wall of the casting mold, during casting, the support rod is pushed through the hydraulic press, the support rod moves from one side to one side of the casting mold along the sliding chute through the lower end pulley, because the casting bin is fixedly connected with the support rod, the casting bin drives the casting tube to move from one side to the other side of the casting mold along with the movement of the support rod, after the pipe orifice of the casting tube moves to the other side of the casting mold, the hydraulic press pulls the support rod back again, so that the casting tube moves from the other side to one side of the interior of the casting mold, the casting liquid can be uniformly cast on the inner wall of the casting mold, so that the casting liquid is prevented from forming a single point impact to damage the casting mold, and the service life of the casting mold is prolonged;
2. in the casting process, the nodular cast iron pipe is formed by cooling the casting liquid under the action of centrifugal force, so that after the nodular cast iron pipe is molded, the inner surface of the nodular cast iron pipe is uneven, in order to ensure the molding quality of the nodular cast iron pipe, the inner surface of the nodular cast iron pipe can be smoothed by the smoothing mechanism, the thickness of the molded casting blank is gradually increased along with the gradual injection of the casting liquid, when the required casting requirement is met, the inner wall of the nodular cast iron pipe is contacted with the smoothing plate, the inner wall of the nodular cast iron pipe is smoothed by the rotation of the casting mold and matching with the circular arc shape of the smoothing plate, and the smoothing mechanism is matched with the displacement mechanism to move back and forth along with the casting pipe in the casting mold, so that the smoothing range is expanded, the whole inner surface of the nodular cast iron pipe can be smoothed, the inner surface of the nodular cast iron pipe is smooth and flat, and the molding quality of the, meanwhile, the fixing rod on the flattening mechanism can be sleeved on the telescopic rod to move up and down, so that the flattening mechanism can be adjusted according to the thickness of the nodular cast iron pipe to be poured, the flattening mechanism can be suitable for flattening the nodular cast iron pipes with different thicknesses, after the distance between the fixing rod and the telescopic rod is adjusted, the fixing rod is aligned with the positioning hole on the telescopic rod, then the positioning bolt penetrates into the positioning hole to fix the fixing rod and the telescopic rod, and the reinforcing rods at the front end and the rear end of the flattening plate increase the stability of the flattening plate;
3. when the pouring liquid is introduced into the pouring mold, part of the pouring liquid is splashed to the surface of the pouring tube due to impact, the diameter of the pouring tube is increased if the pouring liquid is cooled and molded, and the movement of the pouring tube is influenced;
4. the nodular cast iron pipe is embedded in the casting mold after being molded, the nodular cast iron pipe is in a tubular shape and is not easy to lift, meanwhile, adsorption force exists between the nodular cast iron pipe and the inner wall of the casting mold and is difficult to take out from the casting mold, at the moment, a bottom baffle is fixed on one side between side baffles through a positioning pin before casting, a lifting mechanism is combined with a rear end cover to form a cylindrical grid, then the lifting mechanism is plugged into the casting mold, the nodular cast iron pipe is molded in the lifting mechanism, after the casting is finished and cooled and molded, a connecting seat and the rear end cover are disassembled, then the lifting mechanism is lifted through a lifting ring on the rear end cover, the nodular cast iron pipe is taken out from the casting mold, then the positioning pin is disassembled, the bottom baffle is disassembled from the side baffles, the nodular cast iron pipe can be taken out from the lifting mechanism, and the molded nodular cast iron pipe is convenient to, when the hoisting mechanism is plugged into the casting mold, the side baffle is clamped into the clamping groove on the lining, the side baffle and the clamping groove are in trapezoidal shapes, the side baffle is prevented from being separated from the clamping groove, the side baffle is clamped into the clamping groove and then assembled with the lining to form a plane, the outer surface of the nodular cast iron pipe after casting molding is ensured to be relatively flat, the part of the nodular cast iron pipe after casting molding is attached to the lining, the other part of the nodular cast iron pipe after casting is attached to the side baffle, the lining and the side baffle can relatively displace, so that the demolding of the nodular cast iron pipe after molding is facilitated, burrs are formed on the outer surface of the nodular cast iron pipe after molding, the outer surface of the nodular cast iron pipe needs to be polished in order to ensure the quality of the nodular cast iron pipe, the hoisting mechanism hoists the nodular cast iron pipe to be separated from the casting mold, the bottom baffle can be detached to rotate the side baffle through the rear, the side baffle plate is attached to the nodular cast iron pipe more tightly, the polishing piece is arranged on the contact surface of the side baffle plate and the nodular cast iron pipe, the surface of the nodular cast iron pipe can be polished when the side baffle plate rotates, the surface of the nodular cast iron pipe is smooth, the polishing process is not needed to be additionally added, the molding quality of the nodular cast iron pipe is guaranteed, the cost is saved, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the displacement mechanism of the present invention;
FIG. 3 is a view of the pouring tube of the present invention in combination with heating wires;
FIG. 4 is a schematic view of the front end cap of the present invention;
FIG. 5 is a view of the rear end cap in combination with a lifting mechanism of the present invention;
FIG. 6 is a view of the rear end cap in combination with the bail of the present invention;
FIG. 7 is a schematic view of a connecting seat structure of the present invention;
FIG. 8 is an assembled view of the liner of the present invention in combination with a card slot;
FIG. 9 is a process flow diagram of the present invention;
description of reference numerals:
1. a base; 2. a displacement mechanism; 21. a chute; 22. a pulley; 23. a stay bar; 24. a hydraulic press; 3. a pouring bin; 31. a pouring tube; 32. a smoothing mechanism; 321. flattening the plate; 322. fixing the rod; 323. a reinforcing bar; 324. a telescopic rod; 325. positioning holes; 326. positioning the bolt; 33. heating wires; 4. pouring a mold; 41. a front end cover; 411. scraping rings; 42. a rear end cap; 43. fixing the screw rod; 44. fixing a nut; 45. a liner; 46. a first fixing hole; 47. a hoisting mechanism; 471. a side dam; 472. a bottom baffle; 473. positioning pins; 474. a card slot; 475. a hoisting ring; 476. a groove; 48. a second fixing hole; 5. a motor; 6. a connecting seat.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 9, the present invention provides a technical solution:
a pouring process for nodular cast iron production comprises the following steps:
s1: collecting and melting the raw materials for pouring the nodular cast iron at high temperature, stirring, uniformly mixing the raw materials, and placing the mixture in a heat-insulating barrel for heat-insulating treatment to obtain pouring liquid;
s2: arranging a lining 45 of the pouring device on the inner surface of the pouring mold 4, respectively closing and sealing the front end cover 41 and the rear end cover 42 on the fine mechanism of the pouring mold 4 from two sides of the pouring mold 4, heating the pouring liquid obtained in the step S1, pouring the heated pouring liquid into the pouring bin 3, guiding the heated pouring liquid into the pouring mold 4 from the pouring bin 3, and starting the pouring device to obtain the nodular cast iron pipe;
s3: collecting the nodular cast iron pipes produced by the pouring device in the S2, carrying out quality inspection on the collected nodular cast iron pipes, packaging the qualified nodular cast iron pipes, and putting the unqualified nodular cast iron pipes in the heat-insulating barrel again after high-temperature melting for recycling;
the pouring device in the step S2 comprises a base 1, wherein a displacement mechanism 2, a pouring bin 3, a pouring mold 4, a motor 5 and a connecting seat 6 are sequentially arranged on the base 1, the displacement mechanism 2 is arranged on one side of the outer surface of the upper end of the base 1, the pouring bin 3 is fixedly arranged at the upper end of the displacement mechanism 2, the pouring mold 4 is movably arranged at the middle position of the outer surface of the upper end of the base 1, the motor 5 is movably arranged on the other side of the outer surface of the upper end of the base 1, and the connecting seat 6 is movably arranged between the motor 5 and the pouring mold 4;
the casting mold 4 comprises a front end cover 41, a rear end cover 42, a fixed screw rod 43, a fixed nut 44, a lining 45, a first fixed hole 46, a lifting mechanism 47 and a second fixed hole 48, the front end cover 41 and the rear end cover 42 are respectively movably mounted at two sides of the casting mold 4, the first fixing hole 46 is opened at the outer surface edges of two sides of the front end cover 41 and the rear end cover 42, the fixing screw 43 penetrates through the inside of the first fixing hole 46 adjacent to the front end cover 41 and the rear end cover 42, the fixing nuts 44 are sleeved on two sides of the outer surface of the fixing screw 43, and the fixing nuts 44 are located on the sides of the front end cover 41 and the rear end cover 42 away from the casting mold 4, the lining 45 is provided on the inner surface of the casting mold 4, the lifting mechanism 47 is arranged on one side of the rear end cover 42, and the second fixing holes 48 are formed in the edges of the outer surfaces of the two sides of the connecting base 6 and the outer surface of one side, close to the connecting base 6, of the rear end cover 42;
the displacement mechanism 2 comprises a sliding chute 21, a pulley 22, a stay bar 23 and a hydraulic press 24, the hydraulic press 24 is movably mounted on one side of the outer surface of the upper end of the base 1, the sliding chute 21 is arranged on the outer surface of the upper end of the base 1 and is positioned in the middle position between the hydraulic press 24 and the pouring mold 4, the pulley 22 is slidably mounted in the sliding chute 21, the stay bar 23 is movably mounted on the upper end of the pulley 22, the upper end of the stay bar 23 is fixedly connected with the pouring bin 3, and the hydraulic press 24 is movably linked with the stay bar 23;
when the casting device works, firstly, the lining 45 is arranged on the inner surface of the casting mold 4, then the front end cover 41 and the rear end cover 42 are respectively sealed to the fine mechanism of the casting mold 4 from two sides of the casting mold 4 in a closed manner, then, the casting liquid is poured into the casting bin 3 and is guided into the casting mold 4 from the casting bin 3, at the moment, the motor 5 is powered on, the motor 5 drives the casting mold 4 to rotate through the connecting seat 6, the casting liquid is uniformly dispersed to the inner wall of the casting mold 4 and is cooled and molded through the centrifugal force generated when the casting mold 4 rotates, a tubular casting blank is formed, the thickness of the molded casting blank is gradually increased along with the gradual injection of the casting liquid until the required casting requirement is met, because the casting liquid is sprayed at a fixed position all the time after entering the casting mold 4 during casting, the temperature of the casting liquid is higher, the casting liquid can be damaged by long-term impact, the casting position of the casting liquid can be adjusted by the displacement mechanism 2, so that the casting liquid is uniformly cast on the inner wall of the casting mold 4, the support rod 23 is pushed by the hydraulic press 24, the support rod 23 moves along the slide groove 21 from one side to the forest side through the lower end pulley 22, because the pouring bin 3 is fixedly connected with the support rod 23, along with the movement of the support rod 23, the pouring bin 3 drives the pouring pipe 31 to move from one side to the other side in the pouring mold 4, when the mouth of the tube 31 is moved to the other side of the interior of the casting mold 4, the hydraulic press 24 pulls back the brace 23, so that the tube 31 moves to the other side of the interior of the casting mold 4, so circulate, the phenomenon of 4 self rotations of cooperation pouring mould for the pouring liquid can be even pouring at the inner wall of pouring mould 4, avoid the pouring liquid to form single-point impact and destroy pouring mould 4, improved pouring mould 4's life.
As an embodiment of the present invention, as shown in fig. 2, an integrally formed pouring tube 31 is disposed at a lower end of an outer surface of one side of the pouring bin 3 close to the pouring mold 4, the pouring tube 31 penetrates through the inside of the pouring mold 4, a leveling mechanism 32 is fixedly mounted at one side of outer surfaces of upper and lower ends of the pouring tube 31 close to the pouring mold 4, the leveling mechanism 32 includes a leveling plate 321, a fixing rod 322, a reinforcing rod 323, an expansion rod 324, a positioning hole 325 and a positioning bolt 326, the expansion rod 324 is fixedly mounted at one side of the outer surfaces of the upper and lower ends of the pouring tube 31 close to the pouring mold 4, the fixing rod 322 is sleeved on an outer surface of the expansion rod 324, the positioning hole 325 is opened at outer surfaces of both sides of the expansion rod 324 and the fixing rod 322, the positioning bolt 326 penetrates through the positioning hole 325, the reinforcing rod 323 is fixedly mounted between front and rear ends of the outer surface of the lower, the smoothing plate 321 is arc-shaped, and because the nodular cast iron pipe is formed by cooling the casting liquid under the action of centrifugal force in the casting process, the inner surface of the nodular cast iron pipe is uneven after the nodular cast iron pipe is molded, in order to ensure the molding quality of the nodular cast iron pipe, the inner surface of the nodular cast iron pipe can be smoothed by the smoothing mechanism 32, the thickness of a molded casting blank is gradually increased along with the gradual injection of the casting liquid, when the required casting requirement is met, the inner wall of the nodular cast iron pipe is contacted with the smoothing plate 321, the inner wall of the nodular cast iron pipe is smoothed by matching the arc shape of the smoothing plate 321 through the self rotation of the casting mold 4, and the smoothing mechanism 32 moves back and forth inside the casting mold 4 along with the casting pipe 31 by matching with the displacement mechanism 2, so that the smoothing range is expanded, the whole inner surface of the nodular cast iron pipe can be smoothed, and the inner surface of the nodular cast iron pipe is smooth and flat, the molding quality of the nodular cast iron pipe is improved, meanwhile, the fixing rod 322 on the flattening mechanism 32 can be sleeved on the telescopic rod 324 to move up and down, so that the flattening mechanism 32 can be adjusted according to the thickness of the nodular cast iron pipe to be poured as required, the flattening mechanism can be suitable for flattening work of the nodular cast iron pipes with different thicknesses, after the distance between the fixing rod 322 and the telescopic rod 324 is adjusted, the fixing rod 322 is aligned with the positioning hole 325 on the telescopic rod 324, then the positioning bolt 326 penetrates into the positioning hole 325 to fix the fixing rod 322 and the telescopic rod 324, and the reinforcing rods 323 at the front end and the rear end of the flattening plate 321 increase the stability of the flattening plate 321.
As an embodiment of the present invention, as shown in fig. 3 to 4, a heating wire 33 is wound inside the pouring tube 31, a scraper ring 411 is fixedly installed at a middle position of one outer surface of the front end cover 41 near the pouring mold 4, the scraper ring 411 wraps the pouring tube 31, one outer surface of the scraper ring 411 near the pouring mold 4 is a chamfered surface, when the pouring fluid is introduced into the pouring mold 4, a part of the pouring fluid is splashed onto the surface of the pouring tube 31 due to impact, and when the pouring fluid is cooled and molded, the diameter of the pouring tube 31 is increased, which affects the movement of the pouring tube 31, at this time, the pouring tube 31 is heated by the heating wire 33 inside the pouring tube 31, which ensures that the pouring fluid attached to the surface of the pouring tube 31 is not cooled and molded, and when the pouring tube 31 moves from the other side of the temple of the pouring mold 4, the heating wire comes into contact with the scraper ring 411 on the front end cover 41, the scraper ring 411 can scrape off the pouring liquid attached to the surface of the pouring tube 31, thereby ensuring the cleanness of the pouring tube 31.
As an embodiment of the present invention, as shown in fig. 5 to 7, the lifting mechanism 47 includes side baffles 471, bottom baffles 472, positioning pins 473, lifting rings 475 and grooves 476, the side baffles 471 are fixedly installed around the outer surface of one side of the rear end cap 42, the bottom baffles 472 are movably installed on one side between adjacent side baffles 471, the positioning pins 473 are screwed between the side baffles 471 and the bottom baffles 472, the lifting rings 475 are fixedly installed at the middle position of the outer surface of the other side of the rear end cap 42, the grooves 476 are opened at the middle position of the outer surface of one side of the connecting seat 6, the lifting rings 475 penetrate inside the grooves 476, since the ductile iron pipe is embedded inside the casting mold 4 after being molded, the ductile iron pipe is tubular and is not easy to lift, and at the same time, there is an adsorption force between the ductile iron pipe and the inner wall of the casting mold 4, and is not easy to be taken out from, the bottom baffle 472 is fixed on one side between the side baffles 471 through the positioning pin 473, the lifting mechanism 47 is combined with the rear end cover 42 to form a cylindrical grid, then the lifting mechanism 47 is plugged into the casting mold 4, the nodular cast iron pipe is molded in the lifting mechanism 47, after the casting is finished and the nodular cast iron pipe is cooled and molded, the connecting seat 6 and the rear end cover 42 are disassembled, then the lifting mechanism 47 is lifted through the lifting ring 475 on the rear end cover 42, the nodular cast iron pipe is taken out from the casting mold 4, then the positioning pin 473 is disassembled, the bottom baffle 472 is detached from the side baffles 471, the nodular cast iron pipe can be taken out from the lifting mechanism 47, and the molded nodular cast iron pipe is conveniently unloaded.
As an embodiment of the present invention, as shown in fig. 5 to 8, the lifting mechanism 47 further includes a clamping groove 474, the clamping groove 474 is opened at a position around the inner surface of the lining 45, the number of side baffles 471 of the clamping groove 474 is the same, the side baffles 471 are clamped inside the clamping groove 474, the clamping groove 474 and the side baffles 471 are both T-shaped, when the lifting mechanism 47 is plugged into the casting mold 4, the side baffles 471 are clamped into the clamping groove 474 on the lining 45, the side baffles 471 and the clamping groove 474 are both trapezoidal, the side baffles 471 are prevented from being separated from the clamping groove 474, the side baffles 471 are assembled with the lining 45 to form a plane after being clamped into the clamping groove 474, so as to ensure that the outer surface of the cast nodular cast iron pipe is relatively flat, since the cast nodular cast iron pipe portion is attached to the lining 45, the other portion is attached to the side baffles 471, and the lining 45 can be relatively displaced, thereby facilitating the demoulding of the formed nodular cast iron pipe.
As an embodiment of the present invention, as shown in fig. 5 to 8, an outer surface of one end of the side baffle 471 close to the rear end cap 42 is an arc concave surface, and an outer surface of one end of the side baffle 471 close to the rear end cap 42 is provided with a polishing plate, since burrs are formed on the outer surface of the nodular cast iron pipe after the nodular cast iron pipe is formed, in order to ensure the quality of the nodular cast iron pipe, the outer surface of the nodular cast iron pipe needs to be polished, after the nodular cast iron pipe is lifted and transported to be separated from the casting mold 4 by the lifting mechanism 47, the side baffle 471 can be rotated by the rear end cap 42 after the bottom baffle 472 is detached, since the contact surface of the side baffle 471 and the nodular cast iron pipe is the arc concave surface, the side baffle 471 is more tightly attached to the nodular cast iron pipe, the contact surface of the side baffle 471 and the nodular cast iron pipe is provided with the polishing plate, the surface of the nodular cast, the grinding process is not required to be additionally added, the molding quality of the nodular cast iron pipe is guaranteed, the cost is saved, and the working efficiency is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The casting process for producing the nodular cast iron is characterized by comprising the following steps of:
s1: collecting and melting the raw materials for pouring the nodular cast iron at high temperature, stirring, uniformly mixing the raw materials, and placing the mixture in a heat-insulating barrel for heat-insulating treatment to obtain pouring liquid;
s2: arranging a lining (45) of a pouring device on the inner surface of a pouring mold (4), respectively closing and sealing a front end cover (41) and a rear end cover (42) to a fine mechanism of the pouring mold (4) from two sides of the pouring mold (4), then heating the pouring liquid obtained in S1, pouring the heated pouring liquid into a pouring bin (3), guiding the heated pouring liquid into the pouring mold (4) from the pouring bin (3), and starting the pouring device to obtain the nodular cast iron pipe;
s3: collecting the nodular cast iron pipes produced by the pouring device in the S2, carrying out quality inspection on the collected nodular cast iron pipes, packaging the qualified nodular cast iron pipes, and putting the unqualified nodular cast iron pipes in the heat-insulating barrel again after high-temperature melting for recycling;
the pouring device in the S2 comprises a base (1), wherein a displacement mechanism (2), a pouring bin (3), a pouring mold (4), a motor (5) and a connecting seat (6) are sequentially arranged on the base (1), the displacement mechanism (2) is arranged on one side of the outer surface of the upper end of the base (1), the pouring bin (3) is fixedly arranged at the upper end of the displacement mechanism (2), the pouring mold (4) is movably arranged in the middle of the outer surface of the upper end of the base (1), the motor (5) is movably arranged on the other side of the outer surface of the upper end of the base (1), and the connecting seat (6) is movably arranged between the motor (5) and the pouring mold (4);
the casting mold (4) comprises a front end cover (41), a rear end cover (42), a fixed screw rod (43), a fixed nut (44), a lining (45), a first fixed hole (46), a lifting mechanism (47) and a second fixed hole (48), wherein the front end cover (41) and the rear end cover (42) are respectively movably installed on two sides of the casting mold (4), the first fixed hole (46) is formed in the outer surface edges of the two sides of the front end cover (41) and the rear end cover (42), the fixed screw rod (43) penetrates through the inner portion of the first fixed hole (46) adjacent to the front end cover (41) and the rear end cover (42), the fixed nut (44) is sleeved on the two sides of the outer surface of the fixed screw rod (43), the fixed nut (44) is located on one side, far away from the mold (4), of the front end cover (41) and the rear end cover (42), the lining (45) is arranged on the inner surface of the casting mold (4), the lifting mechanism (47) is arranged on one side of the rear end cover (42), and the second fixing holes (48) are formed in the edges of the outer surfaces of the two sides of the connecting seat (6) and the outer surface of one side, close to the connecting seat (6), of the rear end cover (42);
displacement mechanism (2) includes spout (21), pulley (22), vaulting pole (23) and hydraulic press (24), hydraulic press (24) movable mounting is in upper end surface one side of base (1), the upper end surface that base (1) was seted up in spout (21) is located intermediate position between hydraulic press (24) and pouring mould (4), pulley (22) slidable mounting is in the inside of spout (21), vaulting pole (23) movable mounting is in the upper end of pulley (22), and fixed connection between the upper end of vaulting pole (23) and pouring storehouse (3), swing joint between hydraulic press (24) and vaulting pole (23).
2. The pouring process for ductile iron production according to claim 1, wherein the lower end position of the outer surface of one side of the pouring bin (3) close to the pouring mold (4) is provided with an integrally formed pouring tube (31), the pouring tube (31) penetrates through the inside of the pouring mold (4), one side of the outer surfaces of the upper and lower ends of the pouring tube (31) close to the pouring mold (4) is fixedly provided with a flattening mechanism (32), the flattening mechanism (32) comprises a flattening plate (321), a fixing rod (322), a reinforcing rod (323), a telescopic rod (324), a positioning hole (325) and a positioning bolt (326), the telescopic rod (324) is fixedly arranged on one side of the outer surfaces of the upper and lower ends of the pouring tube (31) close to the pouring mold (4), the fixing rod (322) is sleeved on the outer surface of the telescopic rod (324), the positioning hole (325) is opened on the outer surfaces of both sides of the telescopic rod (324) and the fixing rod (322), the positioning bolt (326) penetrates through the positioning hole (325), the reinforcing rod (323) is fixedly installed between the front end and the rear end of the outer surface of the lower end of the stroking plate (321) and the lower ends of the outer surfaces of the front end and the rear end of the fixing rod (322), and the stroking plate (321) is arc-shaped.
3. The pouring process for ductile cast iron production according to claim 2, wherein the heating wire (33) is wound inside the pouring tube (31), the scraping ring (411) is fixedly installed at the middle position of the outer surface of one side of the front end cover (41) close to the pouring mold (4), the scraping ring (411) wraps the pouring tube (31), and the outer surface of one side of the scraping ring (411) close to the pouring mold (4) is a chamfer.
4. The pouring process for ductile cast iron production according to claim 1, wherein the lifting mechanism (47) comprises side baffles (471), bottom baffles (472), positioning pins (473), lifting rings (475) and grooves (476), the side baffles (471) are fixedly installed around the outer surface of one side of the rear end cover (42), the bottom baffles (472) are movably installed on one side between the adjacent side baffles (471), the positioning pins (473) are in threaded connection between the side baffles (471) and the bottom baffles (472), the lifting rings (475) are fixedly installed in the middle position of the outer surface of the other side of the rear end cover (42), the grooves (476) are opened in the middle position of the outer surface of one side of the connecting seat (6), and the lifting rings (475) penetrate through the inside of the grooves (476).
5. The casting process for nodular cast iron production according to claim 4, wherein the lifting mechanism (47) further comprises clamping grooves (474), the clamping grooves (474) are arranged at the periphery of the inner surface of the lining (45), the number of side baffles (471) of the clamping grooves (474) is the same, the side baffles (471) are clamped in the clamping grooves (474), and the clamping grooves (474) and the side baffles (471) are both T-shaped.
6. The pouring process for ductile iron production according to claim 4, wherein the outer surface of one end of the side barrier (471) close to the rear end cap (42) is an arc concave surface, and the outer surface of one end of the side barrier (471) close to the rear end cap (42) is provided with a polishing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011197848.XA CN112317715A (en) | 2020-10-30 | 2020-10-30 | Pouring process for nodular cast iron production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011197848.XA CN112317715A (en) | 2020-10-30 | 2020-10-30 | Pouring process for nodular cast iron production |
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| CN112317715A true CN112317715A (en) | 2021-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114734578A (en) * | 2022-03-21 | 2022-07-12 | 湖北汉塑管业集团有限公司 | Nodular cast iron pipe hot melting heat preservation cover mould |
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