CN113695549A - Method for manufacturing pressure casting product with alloy lining or inner container - Google Patents
Method for manufacturing pressure casting product with alloy lining or inner container Download PDFInfo
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- CN113695549A CN113695549A CN202111019501.0A CN202111019501A CN113695549A CN 113695549 A CN113695549 A CN 113695549A CN 202111019501 A CN202111019501 A CN 202111019501A CN 113695549 A CN113695549 A CN 113695549A
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/002—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure using movable moulds
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
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- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a method for manufacturing a pressure casting product with an alloy lining or an inner container. The die for pressure casting products with alloy lining or inner container is a hollow combined die, which is composed of hollow dies made of steel plates, the alloy lining is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates. The inner surface of the hollow sub-die is coated with molten steel slag powder or glass powder, and water is injected into the hollow sub-die and the alloy inner container. The hollow split dies are assembled into a hollow combined die by screws and nuts, the hollow split die is clamped on a metal conveying belt and is conveyed to the lower surface of a steel water pipe, the steel water pipe moves in the opposite direction to be in butt joint with a molten steel inlet of the hollow combined die, a spiral extrusion pump pressurizes the molten steel, and then the molten steel enters the hollow combined die from the steel water pipe through an opened ceramic valve. Water in the hollow sub-die and the alloy inner container is heated to be changed into steam which is discharged from the safety valve, the alloy inner container is cooled, and the alloy inner container is prevented from melting and deforming; and simultaneously, the blank in the hollow combined die is cooled.
Description
The technical field is as follows:
the invention relates to a method for manufacturing a pressure casting product with an alloy lining or an inner container.
Background art:
the sand core is placed in the die assembly of the die casting if the die casting product is hollow. Mineral oil is doped in sand to press the sand into a sand core, and the mineral oil can generate combustible gas during pressure casting to collapse the sand core and influence the quality of a pressure casting product.
The liners of water pumps and valves used in food, medicine and chemical production need stainless steel or aluminum alloy to prevent rusting. The medical oxygen is clean, and the oxygen bottle with the inner container made of stainless steel meets the sanitary standard.
The invention content is as follows:
a method of making a pressure cast article with an alloy liner. The centrifugal pump shell mould with the alloy lining is a hollow combined mould which consists of hollow sub-moulds of the centrifugal pump shell, the hollow sub-moulds of the centrifugal pump shell are formed by stamping and welding steel plates, and the alloy lining of the centrifugal pump shell is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-die of the centrifugal pump shell which is contacted with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-die of the centrifugal pump shell which is contacted with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the centrifugal pump shell, and the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the centrifugal pump shell can separate the centrifugal pump shell from the hollow sub-die of the centrifugal pump shell after pressure casting. A hollow sub-mould of the centrifugal pump shell is attached to the back of the alloy lining of the centrifugal pump, so that heat transferred from the alloy lining of the centrifugal pump during pressure casting is absorbed, and the alloy lining of the centrifugal pump is prevented from melting and deforming. The hollow screw with the front and the rear sealed ends is screwed into the nut of the water outlet of the alloy lining of the centrifugal pump shell, iron pipes are arranged on the hollow sub-die and the hollow screw of the centrifugal pump shell, each iron pipe is provided with a tee joint, and a side opening of each tee joint is provided with a safety valve. The method comprises the steps of filling a set amount of water into the centrifugal pump shell hollow sub-mold and the hollow screw through the upper opening of each tee joint, sealing the upper openings of the centrifugal pump shell hollow sub-mold and the hollow screw tee joint by using the same number of plugs, and assembling the centrifugal pump shell hollow sub-mold and the centrifugal pump shell alloy lining together by using screws and nuts to form the centrifugal pump shell hollow combined mold with the alloy lining. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the hollow combined molds of the centrifugal pump casings which are provided with the alloy linings one by one on a metal conveying belt. Starting a screw extrusion pump to pressurize molten steel, and when a certain hollow combined die of the centrifugal pump shell with the alloy lining moves to a set position and a molten steel pipe outlet connected with a ceramic valve can be aligned with a molten steel inlet of the hollow combined die of the centrifugal pump shell with the alloy lining, sending a signal by a Hall effect sensor, and stopping supplying power to a magnetic clutch of a metal conveyor belt by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining; then the computer controller opens the ceramic valve, and the molten steel from the screw extrusion pump enters the hollow combined die of the centrifugal pump shell with the alloy lining through the opened ceramic valve. The water in the hollow mould and the hollow screw of the centrifugal pump shell absorbs heat and turns into steam, so as to prevent the alloy lining from melting and deforming. When the pressure of the steam in the hollow mould and the hollow screw of the centrifugal pump shell exceeds the set pressure of the safety valves, the hollow mould and the safety valve of the hollow screw of the centrifugal pump shell are opened to discharge the steam. After the centrifugal pump shell hollow combined die with the alloy lining is filled with molten steel, the ceramic valve is closed by the computer controller; and meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the return spring to drive the steel water pipe connected out of the ceramic valve to move upwards, so that the steel water pipe connected out of the ceramic valve is separated from the molten steel inlet of the hollow combined die of the centrifugal pump shell with the alloy lining. And the computer controller energizes the electromagnetic clutch again to feed the metal belt, the metal belt of the metal belt motor moves continuously, and the centrifugal pump shell hollow combined die filled with the alloy lining and subjected to pressure casting is transported to a remote place and then taken down by a robot. When the molten steel cooling solidification temperature in the centrifugal pump shell hollow combined die with the alloy lining is reduced to a set value, the screw is screwed out of the nut, the centrifugal pump shell hollow sub-die is disassembled, the centrifugal pump shell 1 is taken out, and then the hollow screw is screwed out of the nut at the water outlet of the centrifugal pump shell with the alloy lining. The process of manufacturing the centrifugal pump cover with the alloy lining is the same as the process of manufacturing the centrifugal pump shell with the alloy lining.
A method of making a pressure cast article with an alloy liner. The hollow combined die of the stop valve casing is formed by a hollow sub die of the stop valve casing, the hollow sub die of the stop valve casing is formed by stamping and welding steel plates, and the alloy lining of the stop valve is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-die of the stop valve shell which is contacted with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-die of the stop valve shell which is contacted with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the stop valve shell, and the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the stop valve shell can separate the hollow sub-die of the stop valve shell from the hollow sub-die of the stop valve shell after pressure casting. And three sealed hollow screws are screwed into nuts of the water inlet, the water outlet and the screw port of the stop valve alloy lining, and the three hollow screws are communicated with the cavity of the stop valve alloy lining. Iron pipes are arranged on the stop valve shell hollow sub-die and the alloy lining screw rod opening hollow screw, a tee joint is arranged on each iron pipe, a safety valve is arranged at a side opening of each tee joint, and water with a set amount is filled into the stop valve shell hollow sub-die and the stop valve alloy lining cavity through an upper opening of each tee joint; then the upper openings of the three-way pipes on the stop valve casing hollow sub-mould and the alloy lining screw rod opening hollow screw are sealed by the same number of plugs, and then the stop valve casing hollow sub-mould and the stop valve casing alloy lining are assembled together by the screws and the nuts to form the stop valve casing hollow combined mould filled with the alloy lining. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die provided with the alloy lining stop valve shell. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the stop valve shell hollow combined dies which are provided with the alloy linings one by one on the metal conveyor belt. Starting a screw extrusion pump to pressurize molten steel, and when a certain stop valve shell hollow combined die with an alloy lining moves to a set position and a molten steel pipe orifice connected with a ceramic valve can be aligned with a molten steel inlet of the stop valve shell hollow combined die with the alloy lining, sending a signal by a Hall effect sensor, and stopping supplying power to a metal conveying belt electromagnetic clutch by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow assembling die of the stop valve casing provided with the alloy lining; then the computer controller opens the ceramic valve, the molten steel from the screw extrusion pump enters a hollow combined mould of the stop valve casing with the alloy lining through the opened ceramic valve, and the water in the hollow split mould of the stop valve casing and the hollow cavity of the alloy lining of the stop valve absorbs heat quantity to become steam, thereby preventing the alloy lining from melting and deforming. When the pressure of the water vapor in the hollow sub-mold of the stop valve casing and the cavity of the alloy lining of the stop valve exceeds the set pressure of the safety valves, the hollow sub-mold of the stop valve casing and the safety valve of the cavity of the alloy lining of the stop valve open to discharge the water vapor. After the stop valve shell hollow combined die with the alloy lining is filled with molten steel, the computer control instrument closes the ceramic valve; and simultaneously, stopping supplying power to the electromagnet, and moving the armature upwards under the action of the reset spring to drive the steel water pipe connected out of the ceramic valve to move upwards so as to separate the steel water pipe connected out of the ceramic valve from the molten steel inlet of the stop valve shell hollow combined die with the alloy lining. And the computer controller energizes the electromagnetic clutch again to feed the metal, the metal conveyor belt of the metal conveyor belt motor moves continuously, and the hollow combined die with the alloy lining, which is filled with the pressure casting, of the stop valve casing is transported to a remote place and then taken down by the robot. When molten steel in the stop valve shell hollow combined die with the alloy lining is cooled and solidified and the temperature is reduced to a set value, the screw is unscrewed from the nut, the stop valve shell hollow sub-die is disassembled, the stop valve shell is taken out, and then the three hollow screws are unscrewed from the nuts of a stop valve shell water inlet, a water outlet and a screw rod opening of the alloy lining.
A method for manufacturing a pressure casting product with an alloy inner container. The oxygen cylinder mold with alloy lining is a hollow combined mold, which consists of oxygen cylinder hollow sub-molds, the oxygen cylinder hollow sub-molds are formed by punching and welding steel plates, and the oxygen cylinder alloy inner container is formed by punching and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-mold of an oxygen cylinder which is in contact with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-mold of the oxygen cylinder which is in contact with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-mold of the oxygen cylinder, and the steel slag powder or the glass powder on the inner surface of the hollow sub-mold of the oxygen cylinder can separate the oxygen cylinder from the hollow sub-mold of the oxygen cylinder after pressure casting. The hollow screw of the seal is screwed into the nut at the inlet of the oxygen cylinder alloy liner, iron pipes are arranged on the oxygen cylinder hollow sub-mold and the hollow screw at the inlet of the oxygen cylinder alloy liner, each iron pipe is provided with a tee joint, and a safety valve is arranged at the side opening of each tee joint. The oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are filled with water with set amount through the upper opening of each tee joint, then the upper openings of the tee joints on the inlets of the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are sealed by the plugs with the same amount, and then the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are assembled together by screws and nuts to form the oxygen cylinder hollow combined mold with the alloy liner. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the oxygen cylinder hollow combined dies which are provided with the alloy inner containers one by one on the metal conveying belt. Starting a screw extrusion pump to pressurize the molten steel, and when a certain hollow oxygen cylinder combined die with an alloy inner container moves to a set position and a molten steel inlet of the hollow oxygen cylinder combined die with the alloy inner container can be aligned to a molten steel outlet of the hollow oxygen cylinder combined die with the alloy inner container, sending a signal by a Hall effect sensor, and stopping supplying power to a magnetic clutch of a metal conveyor belt by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the oxygen cylinder hollow combined die provided with the alloy inner container; then the computer controller opens the ceramic valve, and the molten steel from the screw extrusion pump enters the oxygen cylinder hollow combined die with the alloy inner container through the opened ceramic valve. The water in the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container absorbs heat and turns into steam, and the oxygen cylinder alloy inner container is prevented from melting and deforming. When the pressure of the water vapor in the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container exceeds the set pressure of the safety valves, the safety valves on the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container inlet open to discharge the water vapor. After the oxygen cylinder hollow combined die with the alloy inner container is filled with molten steel, the ceramic valve is closed by the computer control instrument; and meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the return spring to drive the steel water pipe connected with the ceramic valve to move upwards, so that the steel water pipe connected with the ceramic valve is separated from the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container. And the computer controller energizes the electromagnetic clutch again to feed the metal belt, the metal belt of the metal belt motor moves continuously, and the oxygen cylinder hollow combined die filled with the alloy inner container and subjected to pressure casting is transported to a remote place and then taken down by a robot. When the molten steel in the oxygen cylinder hollow combined die with the alloy inner container is cooled and solidified and the temperature is reduced to a set value, the screw is screwed out of the nut, the oxygen cylinder hollow sub-die is disassembled, the oxygen cylinder is taken out, and then the hollow screw is screwed out of the nut at the inlet of the oxygen cylinder alloy inner container.
The pressure casting product does not need to manufacture sand cores, and avoids collapse and deformation of the sand cores in the pressure casting process, so that waste products are produced. And the alloy lining or the inner container is used in the product, so that the product is not easy to rust, and the service life of the product is prolonged. The alloy lining or the inner container is used in the food production equipment, which meets the sanitary requirements of food processing.
Description of the drawings:
the present invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is an external view of a centrifugal pump casing according to the present invention.
FIG. 2 is an external view of a centrifugal pump cover of the present invention.
Fig. 3 is a cross-sectional view of a shut-off valve housing of the present invention.
Fig. 4 is a sectional view of an oxygen cylinder according to the present invention.
The specific implementation mode is as follows:
a method of making a pressure cast article with an alloy liner as shown in figures 1 and 2. The centrifugal pump shell mould with the alloy lining is a hollow combined mould which consists of hollow sub-moulds of the centrifugal pump shell, the hollow sub-moulds of the centrifugal pump shell are formed by stamping and welding steel plates, and the alloy lining of the centrifugal pump shell is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-die of the centrifugal pump shell which is contacted with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-die of the centrifugal pump shell which is contacted with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the centrifugal pump shell, and the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the centrifugal pump shell can separate the centrifugal pump shell 1 after pressure casting from the hollow sub-die of the centrifugal pump shell. A hollow sub-mould of the centrifugal pump shell is attached to the back of the alloy lining of the centrifugal pump, so that heat transferred from the alloy lining of the centrifugal pump during pressure casting is absorbed, and the alloy lining of the centrifugal pump is prevented from melting and deforming. The hollow screw with the front and the rear sealed ends is screwed into the nut of the water outlet of the alloy lining of the centrifugal pump shell, iron pipes are arranged on the hollow sub-die and the hollow screw of the centrifugal pump shell, each iron pipe is provided with a tee joint, and a side opening of each tee joint is provided with a safety valve. The method comprises the steps of filling a set amount of water into the centrifugal pump shell hollow sub-mold and the hollow screw through the upper opening of each tee joint, sealing the upper openings of the centrifugal pump shell hollow sub-mold and the hollow screw tee joint by using the same number of plugs, and assembling the centrifugal pump shell hollow sub-mold and the centrifugal pump shell alloy lining together by using screws and nuts to form the centrifugal pump shell hollow combined mold with the alloy lining. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the hollow combined molds of the centrifugal pump casings which are provided with the alloy linings one by one on a metal conveying belt. Starting a screw extrusion pump to pressurize molten steel, and when a certain hollow combined die of the centrifugal pump shell with the alloy lining moves to a set position and a molten steel pipe outlet connected with a ceramic valve can be aligned with a molten steel inlet of the hollow combined die of the centrifugal pump shell with the alloy lining, sending a signal by a Hall effect sensor, and stopping supplying power to a magnetic clutch of a metal conveyor belt by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining; then the computer controller opens the ceramic valve, and the molten steel from the screw extrusion pump enters the hollow combined die of the centrifugal pump shell with the alloy lining through the opened ceramic valve. The water in the hollow mould and the hollow screw of the centrifugal pump shell absorbs heat and turns into steam, so as to prevent the alloy lining from melting and deforming. When the pressure of the steam in the hollow mould and the hollow screw of the centrifugal pump shell exceeds the set pressure of the safety valves, the hollow mould and the safety valve of the hollow screw of the centrifugal pump shell are opened to discharge the steam. After the centrifugal pump shell hollow combined die with the alloy lining is filled with molten steel, the ceramic valve is closed by the computer controller; and meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the return spring to drive the steel water pipe connected out of the ceramic valve to move upwards, so that the steel water pipe connected out of the ceramic valve is separated from the molten steel inlet of the hollow combined die of the centrifugal pump shell with the alloy lining. And the computer controller energizes the electromagnetic clutch again to feed the metal belt, the metal belt of the metal belt motor moves continuously, and the centrifugal pump shell hollow combined die filled with the alloy lining and subjected to pressure casting is transported to a remote place and then taken down by a robot. When the molten steel cooling solidification temperature in the centrifugal pump shell hollow combined die with the alloy lining is reduced to a set value, the screw is screwed out of the nut, the centrifugal pump shell hollow sub-die is disassembled, the centrifugal pump shell 1 is taken out, and then the hollow screw is screwed out of the nut at the water outlet of the centrifugal pump shell with the alloy lining. The process of manufacturing the centrifugal pump cover 2 with the alloy lining is the same as the process of manufacturing the centrifugal pump shell 1 with the alloy lining.
FIG. 3 shows a method of making a pressure cast article with an alloy liner. The hollow combined die of the stop valve casing is formed by a hollow sub die of the stop valve casing, the hollow sub die of the stop valve casing is formed by stamping and welding steel plates, and the alloy lining of the stop valve is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-die of the stop valve shell which is contacted with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-die of the stop valve shell which is contacted with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the stop valve shell, and the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the stop valve shell can separate the hollow sub-die of the stop valve shell from the stop valve shell after pressure casting. And three sealed hollow screws are screwed into nuts of the water inlet, the water outlet and the screw port of the stop valve alloy lining, and the three hollow screws are communicated with the cavity of the stop valve alloy lining. Iron pipes are arranged on the stop valve shell hollow sub-die and the alloy lining screw rod opening hollow screw, a tee joint is arranged on each iron pipe, a safety valve is arranged at a side opening of each tee joint, and water with a set amount is filled into the stop valve shell hollow sub-die and the stop valve alloy lining cavity through an upper opening of each tee joint; then the upper openings of the three-way pipes on the stop valve casing hollow sub-mould and the alloy lining screw rod opening hollow screw are sealed by the same number of plugs, and then the stop valve casing hollow sub-mould and the stop valve casing alloy lining are assembled together by the screws and the nuts to form the stop valve casing hollow combined mould filled with the alloy lining. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die provided with the alloy lining stop valve shell. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the stop valve shell hollow combined dies which are provided with the alloy linings one by one on the metal conveyor belt. Starting a screw extrusion pump to pressurize molten steel, and when a certain stop valve shell hollow combined die with an alloy lining moves to a set position and a molten steel pipe orifice connected with a ceramic valve can be aligned with a molten steel inlet of the stop valve shell hollow combined die with the alloy lining, sending a signal by a Hall effect sensor, and stopping supplying power to a metal conveying belt electromagnetic clutch by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow assembling die of the stop valve casing provided with the alloy lining; then the computer controller opens the ceramic valve, the molten steel from the screw extrusion pump enters a hollow combined mould of the stop valve casing with the alloy lining through the opened ceramic valve, and the water in the hollow split mould of the stop valve casing and the hollow cavity of the alloy lining of the stop valve absorbs heat quantity to become steam, thereby preventing the alloy lining from melting and deforming. When the pressure of the water vapor in the hollow sub-mold of the stop valve casing and the cavity of the alloy lining of the stop valve exceeds the set pressure of the safety valves, the hollow sub-mold of the stop valve casing and the safety valve of the cavity of the alloy lining of the stop valve open to discharge the water vapor. After the stop valve shell hollow combined die with the alloy lining is filled with molten steel, the computer control instrument closes the ceramic valve; and simultaneously, stopping supplying power to the electromagnet, and moving the armature upwards under the action of the reset spring to drive the steel water pipe connected out of the ceramic valve to move upwards so as to separate the steel water pipe connected out of the ceramic valve from the molten steel inlet of the stop valve shell hollow combined die with the alloy lining. And the computer controller energizes the electromagnetic clutch again to feed the metal, the metal conveyor belt of the metal conveyor belt motor moves continuously, and the hollow combined die with the alloy lining, which is filled with the pressure casting, of the stop valve casing is transported to a remote place and then taken down by the robot. When molten steel in the stop valve shell hollow combined die with the alloy lining is cooled and solidified and the temperature is reduced to a set value, the screw is unscrewed from the nut, the stop valve shell hollow sub-die is disassembled, the stop valve shell 3 is taken out, and then the three hollow screws are unscrewed from the nuts of a stop valve shell water inlet, a water outlet and a screw rod opening of the alloy lining.
Fig. 4 shows a method for manufacturing a pressure casting product with an alloy inner container. The oxygen cylinder mold with alloy lining is a hollow combined mold, which consists of oxygen cylinder hollow sub-molds, the oxygen cylinder hollow sub-molds are formed by punching and welding steel plates, and the oxygen cylinder alloy inner container is formed by punching and welding stainless steel plates, brass plates or aluminum alloy plates. The steel slag powder or the glass powder is melted by oxyacetylene flame and then sprayed on the inner surface of a hollow sub-mold of an oxygen cylinder which is in contact with molten steel during pressure casting, or the 'water glass' is used for mixing the steel slag powder or the glass powder, then the steel slag powder or the glass powder is coated on the inner surface of the hollow sub-mold of the oxygen cylinder which is in contact with the molten steel during pressure casting, the oxyacetylene flame is used for heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-mold of the oxygen cylinder, and the steel slag powder or the glass powder on the inner surface of the hollow sub-mold of the oxygen cylinder can separate the oxygen cylinder 4 after pressure casting from the hollow sub-mold of the oxygen cylinder. The hollow screw of the seal is screwed into the nut at the inlet of the oxygen cylinder alloy liner, iron pipes are arranged on the oxygen cylinder hollow sub-mold and the hollow screw at the inlet of the oxygen cylinder alloy liner, each iron pipe is provided with a tee joint, and a safety valve is arranged at the side opening of each tee joint. The oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are filled with water with set amount through the upper opening of each tee joint, then the upper openings of the tee joints on the inlets of the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are sealed by the plugs with the same amount, and then the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner are assembled together by screws and nuts to form the oxygen cylinder hollow combined mold with the alloy liner. The outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container. And starting the metal conveying belt motor, then supplying power to the metal conveying belt electromagnetic clutch, and driving the metal conveying belt motor to move. Workers clamp the oxygen cylinder hollow combined dies which are provided with the alloy inner containers one by one on the metal conveying belt. Starting a screw extrusion pump to pressurize the molten steel, and when a certain hollow oxygen cylinder combined die with an alloy inner container moves to a set position and a molten steel inlet of the hollow oxygen cylinder combined die with the alloy inner container can be aligned to a molten steel outlet of the hollow oxygen cylinder combined die with the alloy inner container, sending a signal by a Hall effect sensor, and stopping supplying power to a magnetic clutch of a metal conveyor belt by a computer controller; meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the oxygen cylinder hollow combined die provided with the alloy inner container; then the computer controller opens the ceramic valve, and the molten steel from the screw extrusion pump enters the oxygen cylinder hollow combined die with the alloy inner container through the opened ceramic valve. The water in the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container absorbs heat and turns into steam, and the oxygen cylinder alloy inner container is prevented from melting and deforming. When the pressure of the water vapor in the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container exceeds the set pressure of the safety valves, the safety valves on the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy inner container inlet open to discharge the water vapor. After the oxygen cylinder hollow combined die with the alloy inner container is filled with molten steel, the ceramic valve is closed by the computer control instrument; and meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the return spring to drive the steel water pipe connected with the ceramic valve to move upwards, so that the steel water pipe connected with the ceramic valve is separated from the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container. And the computer controller energizes the electromagnetic clutch again to feed the metal belt, the metal belt of the metal belt motor moves continuously, and the oxygen cylinder hollow combined die filled with the alloy inner container and subjected to pressure casting is transported to a remote place and then taken down by a robot. When the molten steel in the oxygen cylinder hollow combined die with the alloy inner container is cooled and solidified and the temperature is reduced to a set value, the screw is screwed out of the nut, the oxygen cylinder hollow sub-die is disassembled, the oxygen cylinder 4 is taken out, and then the hollow screw is screwed out of the nut at the inlet of the oxygen cylinder alloy inner container.
Claims (3)
1. A method of making a pressure cast article with an alloy liner, comprising: the centrifugal pump shell mould provided with the alloy lining is a hollow combined mould, the centrifugal pump shell hollow combined mould consists of centrifugal pump shell hollow sub-moulds, the centrifugal pump shell hollow sub-moulds are formed by stamping and welding steel plates, and the centrifugal pump shell alloy lining is formed by stamping and welding stainless steel plates, brass plates or aluminum alloy plates; melting steel slag powder or glass powder by oxyacetylene flame, spraying the molten steel slag powder or glass powder on the inner surface of a hollow sub-die of a centrifugal pump shell which is in contact with molten steel during pressure casting, or mixing the steel slag powder or the glass powder by 'water glass', then coating the molten steel slag powder or the glass powder on the inner surface of the hollow sub-die of the centrifugal pump shell which is in contact with the molten steel during pressure casting, and heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the centrifugal pump shell by oxyacetylene flame, wherein the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the centrifugal pump shell can separate the centrifugal pump shell (1) after pressure casting from the hollow sub-die of the centrifugal pump shell; a hollow sub-die of a centrifugal pump shell is attached to the back of the alloy lining of the centrifugal pump, so that the heat transferred from the alloy lining of the centrifugal pump during pressure casting is absorbed, and the alloy lining of the centrifugal pump is prevented from melting and deforming; screwing the hollow screws with front and rear seals into nuts of a water outlet of the alloy lining of the centrifugal pump shell, wherein iron pipes are arranged on the hollow sub-mould and the hollow screws of the centrifugal pump shell, a tee joint is arranged on each iron pipe, a safety valve is arranged at a side opening of each tee joint, water with a set amount is filled into the hollow sub-mould and the hollow screws of the centrifugal pump shell through the upper opening of each tee joint, then the upper openings of the hollow sub-mould and the hollow screw tee joints of the centrifugal pump shell are sealed by plugs with the same number, and then the hollow sub-mould and the alloy lining of the centrifugal pump shell are assembled together by screws and nuts to form a hollow combined mould of the centrifugal pump shell with the alloy lining of the centrifugal pump shell; the outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining; starting a metal conveyer belt motor, then supplying power to a metal conveyer belt electromagnetic clutch, driving the metal conveyer belt motor to move, clamping a centrifugal pump shell hollow combined die with alloy linings one by one on the metal conveyer belt by workers, starting a screw extrusion pump to pressurize molten steel, when one of the centrifugal pump shell hollow combined dies with the alloy lining is moved to a set position, a molten steel pipe port connected out of the ceramic valve can be aligned with a molten steel inlet of the hollow combined die of the centrifugal pump shell with the alloy lining, the Hall effect sensor sends out a signal, the computer controller stops supplying power to the metal conveying belt electromagnetic clutch, meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining; then the computer controller opens the ceramic valve, the molten steel from the screw extrusion pump enters the hollow combined mould of the centrifugal pump shell with the alloy lining through the opened ceramic valve, the water in the hollow sub-mould and the hollow screw of the centrifugal pump shell absorbs heat quantity and becomes steam to prevent the alloy lining from melting and deforming, when the pressure of the steam in the hollow sub-mould and the hollow screw of the centrifugal pump shell exceeds the pressure set by the safety valves, the hollow parting die of the centrifugal pump shell and the hollow screw safety valve are opened to discharge water vapor, after the hollow combined die of the centrifugal pump shell with the alloy lining is filled with molten steel, the computer controller closes the ceramic valve, meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the return spring to drive the steel water pipe connected out of the ceramic valve to move upwards, so that the steel water pipe connected out of the ceramic valve is separated from the molten steel inlet of the hollow combined die of the centrifugal pump shell provided with the alloy lining; the computer controller energizes the electromagnetic clutch again to the metal conveyor belt, the metal conveyor belt motor continues to move, and the centrifugal pump shell hollow combined die filled with the alloy lining and subjected to pressure casting is transported to a remote place and then taken down by a robot; when the molten steel cooling solidification temperature in the centrifugal pump shell hollow combined die with the alloy lining is reduced to a set value, the screw is screwed out of the nut, the centrifugal pump shell hollow sub-die is disassembled, the centrifugal pump shell (1) is taken out, and then the hollow screw is screwed out of the nut at the water outlet of the centrifugal pump shell with the alloy lining; the process for manufacturing the centrifugal pump cover (2) with the alloy lining is the same as the process for manufacturing the centrifugal pump shell (1) with the alloy lining.
2. A method of making a pressure cast article with an alloy liner, comprising: the stop valve casing die with the alloy lining is a hollow combined die, the stop valve casing hollow combined die consists of a stop valve casing hollow sub die, the stop valve casing hollow sub die is formed by punching and welding steel plates, and the stop valve alloy lining is formed by punching and welding stainless steel plates, brass plates or aluminum alloy plates; melting steel slag powder or glass powder by oxyacetylene flame, spraying the molten steel slag powder or glass powder on the inner surface of a hollow sub-die of a stop valve shell which is in contact with molten steel during pressure casting, or mixing the steel slag powder or the glass powder by 'water glass', then coating the molten steel slag powder or the glass powder on the inner surface of the hollow sub-die of the stop valve shell which is in contact with the molten steel during pressure casting, and heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-die of the stop valve shell by oxyacetylene flame, wherein the steel slag powder or the glass powder on the inner surface of the hollow sub-die of the stop valve shell can separate the hollow sub-die of the stop valve shell from the stop valve shell (3) after pressure casting; three sealed hollow screws are screwed into nuts of a water inlet, a water outlet and a screw port of the alloy lining of the stop valve, and the three hollow screws are communicated with a cavity of the alloy lining of the stop valve; the cut-off valve shell hollow sub-die and the alloy lining screw rod opening hollow screw are provided with iron pipes, each iron pipe is provided with a tee joint, the side opening of each tee joint is provided with a safety valve, a set amount of water is filled into the cut-off valve shell hollow sub-die and the cut-off valve alloy lining cavity through the upper opening of each tee joint, then the upper openings of the tee joints on the cut-off valve shell hollow sub-die and the alloy lining screw rod opening hollow screw are sealed by the same number of plugs, and then the cut-off valve shell hollow sub-die and the cut-off valve shell alloy lining are assembled together by screws and nuts to form the cut-off valve shell hollow combined die provided with the alloy lining; the outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the steel water inlet of the hollow combined die provided with the alloy lining stop valve shell; starting a metal conveyer belt motor, then supplying power to an electromagnetic clutch of the metal conveyer belt, driving the metal conveyer belt to move by the metal conveyer belt motor, clamping a closed valve shell hollow combined die with alloy linings one by one on the metal conveyer belt by a worker, starting a screw extrusion pump to pressurize molten steel, when one of the stop valve shell hollow combined dies with the alloy lining is moved to a set position, a steel water pipe opening connected out by the ceramic valve can be aligned with a steel water inlet of the stop valve shell hollow combined die with the alloy lining, the Hall effect sensor sends out a signal, the computer controller stops supplying power to the metal conveying belt electromagnetic clutch, meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the hollow assembling die of the stop valve casing provided with the alloy lining; then the computer controller opens the ceramic valve, the molten steel from the screw extrusion pump enters a cut-off valve shell hollow combined die filled with an alloy lining through the opened ceramic valve, the water in the cut-off valve shell hollow sub-die and the cavity of the cut-off valve alloy lining absorbs heat quantity to become steam, the melting and deformation of the alloy lining are prevented, when the pressure of the steam in the cut-off valve shell hollow sub-die and the cavity of the cut-off valve alloy lining exceeds the set pressure of each safety valve, the hollow parting die of the stop valve casing and the safety valve of the alloy lining cavity of the stop valve are opened to discharge water vapor, after the hollow combined die of the stop valve casing filled with the alloy lining is filled with molten steel, the computer control instrument closes the ceramic valve, simultaneously, stopping supplying power to the electromagnet, and moving the armature upwards under the action of a return spring to drive the steel water pipe connected with the ceramic valve to move upwards so as to separate the steel water pipe connected with the ceramic valve from the molten steel inlet of the stop valve shell hollow combined die with the alloy lining; the computer controller energizes the electromagnetic clutch again to feed the metal, the metal conveyor belt of the metal conveyor belt motor moves continuously, and the cut-off valve shell hollow combined die filled with the alloy lining and subjected to pressure casting is transported to a remote place and then taken down by a robot; when molten steel in the stop valve shell hollow combined die with the alloy lining is cooled and solidified and the temperature is reduced to a set value, the screw is unscrewed from the nut, the stop valve shell hollow sub-die is disassembled, the stop valve shell (3) is taken out, and then the three hollow screws are unscrewed from the nuts of a stop valve shell water inlet, a water outlet and a screw rod opening of the alloy lining.
3. A method for manufacturing a pressure casting product with an alloy inner container is characterized in that: the oxygen cylinder mould with the alloy lining is a hollow combined mould, the oxygen cylinder hollow combined mould consists of oxygen cylinder hollow sub-moulds, the oxygen cylinder hollow sub-moulds are formed by punching and welding steel plates, and the oxygen cylinder alloy inner container is formed by punching and welding stainless steel plates, brass plates or aluminum alloy plates; melting steel slag powder or glass powder by oxyacetylene flame, spraying the molten steel slag powder or glass powder on the inner surface of a hollow sub-mold of an oxygen cylinder which is in contact with molten steel during pressure casting, or blending the steel slag powder or the glass powder by 'water glass', then coating the molten steel slag powder or the glass powder on the inner surface of the hollow sub-mold of the oxygen cylinder which is in contact with the molten steel during pressure casting, and heating and melting the steel slag powder or the glass powder coated on the inner surface of the hollow sub-mold of the oxygen cylinder by oxyacetylene flame, wherein the steel slag powder or the glass powder on the inner surface of the hollow sub-mold of the oxygen cylinder can separate an oxygen cylinder (4) which is subjected to pressure casting from the hollow sub-mold of the oxygen cylinder; screwing the sealed hollow screw into a nut at the inlet of the oxygen cylinder alloy liner, arranging iron pipes on the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner inlet hollow screw, arranging a tee joint on each iron pipe, arranging a safety valve at the side opening of each tee joint, filling a set amount of water into the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner through the upper opening of each tee joint, sealing the upper openings of the tee joints on the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner inlet by using the same number of plugs, and assembling the oxygen cylinder hollow sub-mold and the oxygen cylinder alloy liner together by using the screw and the nut to form an oxygen cylinder hollow combined mold with the alloy liner; the outlet of the steel water pipe of the screw extrusion pump is connected to the inlet of the ceramic valve, and the steel water pipe connected out of the ceramic valve can be aligned to the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container; starting a metal conveyer belt motor, then supplying power to an electromagnetic clutch of the metal conveyer belt, driving the metal conveyer belt to move by the metal conveyer belt motor, clamping one oxygen cylinder hollow combined die with an alloy inner container on the metal conveyer belt by a worker, starting a screw extrusion pump to pressurize molten steel, when one of the oxygen cylinder hollow combined dies with the alloy inner container is moved to a set position, the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container can be aligned with the molten steel outlet of the ceramic valve, the Hall effect sensor sends out a signal, the computer controller stops supplying power to the metal conveying belt electromagnetic clutch, meanwhile, the computer controller enables an electromagnet above a steel water pipe connected with the ceramic valve to be electrified and sucked, and pushes the steel water pipe connected with the ceramic valve to the direction to be butted with a steel water inlet of the oxygen cylinder hollow combined die provided with the alloy inner container; then the computer control instrument opens the ceramic valve, the molten steel from the screw extrusion pump enters the oxygen cylinder hollow combined die with the alloy inner container through the opened ceramic valve, the water in the oxygen cylinder hollow sub-die and the oxygen cylinder alloy inner container absorbs heat quantity to become water vapor, the melting and the deformation of the oxygen cylinder alloy inner container are prevented, when the pressure of the water vapor in the oxygen cylinder hollow sub-die and the oxygen cylinder alloy inner container exceeds the pressure set by the safety valves, the oxygen cylinder hollow sub-mold and the safety valve on the inlet of the oxygen cylinder alloy liner open to discharge water vapor, after the oxygen cylinder hollow combined mold with the alloy liner is filled with molten steel, the computer control instrument closes the ceramic valve, meanwhile, the power supply to the electromagnet is stopped, and the armature moves upwards under the action of the reset spring to drive the steel water pipe connected with the ceramic valve to move upwards, so that the steel water pipe connected with the ceramic valve is separated from the molten steel inlet of the oxygen cylinder hollow combined die with the alloy inner container; the computer controller energizes the electromagnetic clutch again to the metal conveyer belt, the metal conveyer belt of the metal conveyer belt motor moves continuously, and the oxygen cylinder hollow combined die with the alloy inner container which is subjected to pressure casting is transported to a remote place and then taken down by a robot; when the molten steel in the oxygen cylinder hollow combined die with the alloy inner container is cooled and solidified and the temperature is reduced to a set value, the screw is screwed out of the nut, the oxygen cylinder hollow sub-die is disassembled, the oxygen cylinder (4) is taken out, and then the hollow screw is screwed out of the nut at the inlet of the oxygen cylinder alloy inner container.
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