CN212310818U - Production brass spare stalk for low-pressure casting and heating system - Google Patents
Production brass spare stalk for low-pressure casting and heating system Download PDFInfo
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- CN212310818U CN212310818U CN202020280594.7U CN202020280594U CN212310818U CN 212310818 U CN212310818 U CN 212310818U CN 202020280594 U CN202020280594 U CN 202020280594U CN 212310818 U CN212310818 U CN 212310818U
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- pressure casting
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- induction coil
- stalk
- lift tube
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Abstract
The utility model provides a production stalk for brass spare low pressure casting, including stalk body and end, end fixed connection in the top of stalk body, a vertical through-hole has been seted up and has been run through to the top surface of end the stalk body, stalk body and end are made by high temperature resistant and corrosion-resistant material respectively and are formed, have improved life, have overcome the shortcoming that traditional seamless steel pipe type stalk exists. The utility model also provides a heating system for producing the lift tube for the low-pressure casting of the brass, which comprises the lift tube for the low-pressure casting; an induction heater comprising an induction coil and a power supply; and when heating, the induction coil is sleeved on the end head. The electromagnetic induction heating is adopted, the field working environment is improved, the potential safety hazard caused by using combustible gas is eliminated, and the production cost of the product is reduced.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a casting equipment field, especially a production brass spare stalk and heating system for low-pressure casting.
[ background of the invention ]
Low-pressure casting is a casting method between pressure casting and gravity casting. The method is that dry compressed air or inert gas is introduced into a crucible filled with molten metal, and the molten metal is made to flow into a cavity along a riser tube from bottom to top through a pouring channel on the surface of the molten metal kept at a certain temperature. After the metal liquid is filled in the cavity, the air pressure is increased, and the air pressure on the metal liquid surface is kept until the casting is completely solidified. And then releasing the pressure, and allowing the unset molten metal in the riser tube and the pouring gate to fall back into the crucible, thereby completing the production process of low-pressure casting.
At present, the liquid lifting pipe used for low-pressure casting is generally formed by welding seamless steel pipes. In order to avoid the influence on production caused by the blockage caused by solidification of molten metal in the end of the riser tube in the processes of rising, filling, pressure maintaining and falling back, the end of the riser tube needs to be heated to keep a certain temperature. Therefore, domestic low-pressure casting production enterprises generally adopt combustible gases such as coal gas, natural gas, liquefied petroleum gas and the like to carry out flame heating on the end of the liquid lifting pipe through the spray pipe and the nozzle. The disadvantages are that:
(1) the method is characterized in that a lift tube is prepared by utilizing a seamless steel tube, and the end of the lift tube is heated by adopting combustible gas, so that the method is a source for causing short service life of the lift tube;
(2) the heating speed is low, the efficiency is low, the heating time is long, and the service life of the lift tube is directly influenced;
(3) the production cost is increased due to large gas consumption;
(4) when the proportion of the combustible gas and the compressed air is not proper, oxidizing atmosphere is generated, so that the end of the lift tube is oxidized more rapidly, and the service life of the lift tube is greatly shortened.
(5) After the riser tube is subjected to flame heating, the production environment is influenced, and potential safety hazards exist.
[ Utility model ] content
The to-be-solved technical problem of the utility model lies in:
the lift tube is made of high-temperature-resistant and corrosion-resistant materials, and overcomes the defects of the traditional seamless steel tube type lift tube.
And the end of the lift tube is heated by induction without using fuel gas, so that the heating system is simple and convenient to operate, the field production environment is greatly improved, and the purposes of energy conservation and emission reduction are achieved.
The utility model discloses a realize like this: the utility model provides a production brass spare low pressure casting uses stalk, includes stalk body and end, end fixed connection in the top of stalk body, a vertical through-hole has been seted up to the top surface of end and has run through the stalk body, stalk body and end are made by high temperature resistant and corrosion-resistant material respectively.
Furthermore, the surfaces of the riser tube body and the end head are respectively provided with a layer of refractory material.
Furthermore, the lift tube body and the end are integrated to form a revolving body.
The utility model also provides a heating system of stalk for low pressure casting, include
The liquid lifting pipe for producing the brass parts in the low-pressure casting process;
an induction heater comprising an induction coil and a power supply; the positive electrode and the negative electrode of the power supply are electrically connected with two ends of the induction coil; the inner diameter of the annular part of the induction coil is larger than the outer diameter of the end head of the lift tube for low-pressure casting;
and when heating, the induction coil is sleeved on the end head.
Furthermore, the induction coil is made of a copper tube, and a high-temperature-resistant insulating layer covers the outer layer of the copper tube.
The utility model has the advantages that: the utility model discloses a stalk for low pressure casting, including stalk body and end, end fixed connection in the top of stalk body, a vertical through-hole has been seted up and has been run through to the top surface of end the stalk body, stalk body and end are made by high temperature resistant and corrosion-resistant material respectively and are formed, have improved life, have overcome the shortcoming that traditional seamless steel pipe type stalk exists.
The utility model also provides a heating system of the lift tube for low-pressure casting, which comprises the lift tube for low-pressure casting; an induction heater comprising an induction coil and a power supply; the positive electrode and the negative electrode of the power supply are electrically connected with two ends of the induction coil; the inner diameter of the annular part of the induction coil is larger than the outer diameter of the end head of the lift tube for low-pressure casting; and when heating, the induction coil is sleeved on the end head. The electromagnetic induction heating is adopted, the field working environment is improved, the potential safety hazard caused by using combustible gas is eliminated, and the gas emission after fuel combustion is reduced.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a lift tube for low pressure casting according to the present invention.
Fig. 2 is a schematic structural diagram of the heater of the present invention.
Fig. 3 is a schematic cross-sectional view of an embodiment of an induction coil according to the present invention.
Fig. 4 is a schematic view of a heating system according to the present invention in use.
Description of reference numerals:
the lift tube 1 for low-pressure casting for producing brass parts,
a riser tube body 11, a tip 12, a vertical through hole 121,
the induction heater 2, the induction coil 21, the power supply 22, the copper pipe 211 and the high-temperature-resistant insulating layer 212;
a melting furnace 3, a melting furnace cover 31;
the mold 4, the gate 41;
low-pressure casting machine 5, mold 51;
an inner diameter D1 of the annular portion of the induction coil;
outer diameter D2 of the tip.
[ detailed description ] embodiments
The utility model discloses the general concept of implementation as follows:
(1) the lift tube body 11 and the end 12 are made of high-temperature-resistant and corrosion-resistant materials, so that the service life is prolonged, for example, in a specific embodiment, the lift tube is integrally cast by ductile cast iron, so that the defects of the traditional seamless steel tube type lift tube are overcome;
(2) the surfaces of the riser tube body 11 and the end 12 are coated with refractory materials, so that the heat resistance of the riser tube body is further improved, and the service life of the riser tube body is prolonged; in a specific embodiment, zircon powder coating is used as the refractory material.
(3) The heating system adopts the induction heater 2 for heating, fuel combustion is not needed, the energy-saving and emission-reducing effects are obvious, the field labor environment is improved, and potential safety hazards caused by using combustible gas are eliminated.
Please refer to fig. 1 to 4.
The utility model discloses a lift tube 1 for low pressure casting, as shown in fig. 1, including lift tube body 11 and end 12, end 12 fixed connection in the top of lift tube body 11, in the concrete embodiment, both can adopt welded connection, also can adopt integrated casting shaping, a vertical through-hole 121 has been seted up and has been run through to the top surface of end 12 lift tube body 11, the circulation passageway of metal liquid when vertical through-hole 121 regard as low pressure casting, lift tube body 11 and end 12 are made by high temperature resistant and corrosion-resistant material respectively and form. The high-temperature-resistant and corrosion-resistant material is adopted, so that the service life is prolonged, and the defects of the traditional seamless steel tube type lift tube are overcome. The end head 12 is used for being sleeved in the induction coil and avoiding direct open fire combustion heating through electromagnetic heating.
In one embodiment, the following is preferred: the surfaces of the riser tube body 11 and the end 12 are respectively provided with a layer of refractory material. The heat resistance of the lift tube 1 for low-pressure casting is further improved, so that the service life is prolonged;
in one embodiment, the following is preferred: the lift tube body 11 and the end 12 are integrated and form a revolving body.
The utility model also provides a heating system of stalk for low pressure casting, include
The lift tube 1 for low-pressure casting;
as shown in fig. 2, an induction heater 2, the induction heater 2 including an induction coil 21 and a power source 22; the positive electrode and the negative electrode of the power supply 22 are electrically connected with two ends of the induction coil 21 to form a loop, electric energy is supplied by the power supply, and the induction coil 21 heats the end head 12; the inner diameter D1 of the annular part of the induction coil 21 is larger than the outer diameter D2 of the head 12 of the lift tube 1 for low-pressure casting, so that the induction coil 21 can be sleeved on the head 12; in a specific embodiment, the inner diameter D1 of the annular portion of the induction coil 21 is 3mm to 5mm larger than the outer diameter D2 of the tip 12 of the lift tube 1 for low pressure casting. Electromagnetic induction heating is adopted, fuel gas is not needed, and the energy-saving and emission-reducing effects are obvious; the operation is convenient, the field working environment is improved, and the potential safety hazard caused by using combustible gas is eliminated.
Wherein, when heating, the induction coil 21 is sleeved on the end head 12.
As shown in figure 3 of the drawings,
a preferred embodiment: the induction coil 21 is made of a copper tube 211, so that an inner cavity of the copper tube 211 can be used for water cooling, and an outer layer of the copper tube 211 is covered with a high-temperature-resistant insulating layer 212, in a specific embodiment, the existing high-temperature-resistant glass fiber or silicon dioxide fiber insulating layer 212 is adopted.
Example (b):
as shown in fig. 4. Fig. 4 is a schematic structural diagram of the heating system installed in the low-pressure casting machine and the smelting furnace.
The liquid lifting pipe 1 for producing the brass parts is integrally cast and formed by ductile cast iron.
The induction heater 2 adopts medium-frequency induction heating and consists of an induction coil 21 and a medium-frequency power supply 22. The intermediate frequency power supply 22 is commercially available. The induction coil 21 is made of a copper pipe 211, when the induction coil is used, water is filled in the copper pipe 211 for cooling, the outer layer is coated with a high-temperature-resistant insulating layer 212, and the inner diameter D1 of the annular part of the induction coil 21 is 3-5 mm larger than the outer diameter D2 of the riser tube end 2.
Firstly, brushing a layer of refractory coating on the surface of the lift tube 1 for low-pressure casting, adopting zircon powder coating as a refractory material, drying, then inserting into a smelting furnace 3, and sealing the contact part of the end head 12 and a smelting furnace cover 31 according to the prior art to prevent air leakage or prevent molten metal from being sprayed out from gaps. Melting the metal in a smelting furnace 3, sealing and preserving heat after refining processes such as slag removal and the like. The mold 4 is mounted on the jig 51 of the low-pressure casting machine 5 and preheated to a desired temperature. The induction coil 21 of the induction heater 2 is sleeved on the end head 12, and two ports of the copper pipe 211 are connected to a water source, for example, a metal water pipe is connected to a circulating cooling water system, and the two ports of the copper pipe 211 are used as a water inlet and a water outlet, when the induction heater is used, water is introduced into the copper pipe 211 for cooling, the intermediate frequency power supply 22 is switched on, and the end head 2 is heated to dark red. The low-pressure casting machine 5 is operated to move the mold 4 with its sprue 41 against the tip 2 and in aligned communication with the vertical through-hole 121.
Dry compressed air is introduced into the sealed smelting furnace 3 in the smelting furnace 3 according to the prior art, and the molten metal in the smelting furnace 3 rises along the vertical through hole 121 under the action of gas pressure to fill the cavity of the casting mold 4. And after the metal liquid is filled in the cavity, increasing the air pressure and keeping the pressure until the casting is completely solidified. Finally, the gas pressure is relieved, and the unset molten metal in the riser tube body 1 falls back into the smelting furnace 3, thus completing the production process of low-pressure casting.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (5)
1. A lift tube for producing brass fittings in low-pressure casting is characterized in that: the novel liquid lifting pipe comprises a liquid lifting pipe body and an end, wherein the end is fixedly connected to the top end of the liquid lifting pipe body, a vertical through hole is formed in the top surface of the end and penetrates through the liquid lifting pipe body, and the liquid lifting pipe body and the end are made of high-temperature-resistant and corrosion-resistant materials respectively.
2. A lift tube for low pressure casting of brass objects as recited in claim 1, wherein: and the surfaces of the riser tube body and the end head are respectively provided with a layer of refractory material.
3. A lift tube for low pressure casting of brass objects as recited in claim 1, wherein: the liquid lifting pipe body and the end are integrated to form a revolving body.
4. A heating system of a lift tube for low-pressure casting of brass parts is characterized in that: comprises that
A lift pipe for low-pressure casting for producing a brass member as recited in any one of claims 1 to 3;
an induction heater comprising an induction coil and a power supply; the positive electrode and the negative electrode of the power supply are electrically connected with two ends of the induction coil; the inner diameter of the annular part of the induction coil is larger than the outer diameter of the end head of the lift tube for low-pressure casting;
and when heating, the induction coil is sleeved on the end head.
5. A heating system for a lift tube for low pressure casting of brass objects as recited in claim 4, wherein: the induction coil is made of a copper tube, and a high-temperature-resistant insulating layer covers the outer layer of the copper tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020280594.7U CN212310818U (en) | 2020-03-09 | 2020-03-09 | Production brass spare stalk for low-pressure casting and heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020280594.7U CN212310818U (en) | 2020-03-09 | 2020-03-09 | Production brass spare stalk for low-pressure casting and heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212310818U true CN212310818U (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020280594.7U Active CN212310818U (en) | 2020-03-09 | 2020-03-09 | Production brass spare stalk for low-pressure casting and heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212310818U (en) |
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2020
- 2020-03-09 CN CN202020280594.7U patent/CN212310818U/en active Active
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Address after: No. 261-16, Liqi village, Hangcheng street, Changle District, Fuzhou, Fujian 350200 Patentee after: Fujian Huatuo Hardware Co.,Ltd. Address before: 350200 Liren Industrial Zone, Hangcheng Town, Changle City, Fuzhou City, Fujian Province Patentee before: FUJIAN CHANGLE HUATUO HARDWARE Co.,Ltd. |