CN115070016A - Low-pressure casting equipment with continuous molten pool holding furnace - Google Patents

Low-pressure casting equipment with continuous molten pool holding furnace Download PDF

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CN115070016A
CN115070016A CN202210849779.9A CN202210849779A CN115070016A CN 115070016 A CN115070016 A CN 115070016A CN 202210849779 A CN202210849779 A CN 202210849779A CN 115070016 A CN115070016 A CN 115070016A
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furnace
riser
molten pool
furnace body
heat preservation
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CN115070016B (en
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张虎
张花蕊
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Beihang University
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Beihang University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

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Abstract

The invention discloses low-pressure casting equipment with a continuous molten pool heat preservation furnace, which comprises a rack and a multi-riser tube continuous molten pool heat preservation furnace, wherein the multi-riser tube continuous molten pool heat preservation furnace comprises a molten pool heat preservation furnace body, a multi-riser tube furnace cover, a riser tube system, a furnace door, a furnace body tilting device, a radiation type heating rod and a furnace body air inlet mechanism; a refractory heat-preservation furnace lining is arranged on the melting tank type heat-preservation furnace body; a melting tank type heat preservation furnace body is provided with a plurality of independently separable liquid lifting pipe furnace covers, and a plurality of liquid lifting pipe orifices are arranged on the furnace covers; the plurality of riser pipe joints can arrange riser pipes in different positions and quantities according to the casting process requirement; the inner wall of the furnace cover is provided with a plurality of mounting grooves, heating rods are arranged in the mounting grooves, and after the electrodes on two sides are electrified, the heating rods heat up and radiate and heat aluminum water; the method is particularly suitable for casting and producing large-size aluminum alloy parts such as large-size aluminum alloy auxiliary frames, new energy automobile battery boxes and the like.

Description

Low-pressure casting equipment with continuous molten pool holding furnace
Technical Field
The invention belongs to the technical field of metal casting equipment, and particularly relates to low-pressure casting equipment with a continuous molten pool holding furnace.
Background
With the development of casting technology, the application of aluminum alloy lightweight technology in automobile, high-speed rail and military industry is more and more extensive. The rapid development and popularization and application of large-size aluminum alloy parts such as hollow integral auxiliary frames with the size larger than 1 m, new energy automobile battery boxes and the like have higher requirements on equipment and processes for casting the large-size parts.
At present, the casting holding furnace for producing parts such as large-size aluminum alloy auxiliary frames, battery boxes and the like by low-pressure casting mainly adopts a crucible holding furnace, the crucible holding furnace mainly comprises a crucible and a holding furnace lining, the heating is surrounded by a resistance band or a resistance wire, the capacity of the crucible holding furnace commonly used at present is different from 300Kg to 3T, according to statistics, the actual production service life of the crucible holding furnace is about 6 months, the crucible holding furnace needs to be replaced once every several months, and the production cost is higher. And the crucible holding furnace is adopted for production, and the furnace cover and the liquid lifting pipe in the furnace need to be lifted every time aluminum liquid is replenished, so that the liquid lifting pipe frequently bears the temperature change of cold and hot alternation, the service life of the liquid lifting pipe is seriously reduced, the liquid lifting pipe needs to be frequently replaced, and the production cost is increased.
The furnace lining of molten pool holding furnace comprises the flame retardant coating heat preservation, adopts silicon carbide stick radiant heating or immersion heating mode to heat more, and the life of molten pool furnace is about 3 years, is 5 ~ 6 times of crucible holding furnace, compares crucible holding furnace manufacturing cost lower, and molten pool holding furnace is furnished with leading fire door, and it is convenient to annotate the aluminium water. But the problems that the large-scale aluminum alloy auxiliary frame with the size larger than 1 m, the battery box body and other parts are cast by adopting the molten pool holding furnace are obvious, the molten pool furnace easily causes the temperature of the aluminum liquid in the furnace to be uneven due to the relation between the structure and the size by adopting a heating mode, the solidification time of the aluminum liquid after mold filling is prolonged due to overhigh temperature, the production rhythm is influenced, the mold filling is influenced due to overlow temperature, and the performance of cast products is seriously influenced due to the uneven temperature of the aluminum liquid in the holding furnace. In addition, when complex thin-wall parts such as large-size aluminum alloy auxiliary frames and battery boxes are produced, a plurality of lift pipes need to be configured, and a heating device needs to be arranged in the molten pool holding furnace, so that the arrangement of the lift pipes is limited, and the production difficulty is caused.
Disclosure of Invention
In order to solve the technical problem, the invention provides low-pressure casting equipment with a continuous molten pool holding furnace. The multi-riser-tube arrangement is met by customizing the furnace type structure, the uniform temperature of the molten aluminum in the furnace is ensured, and the casting application of the multi-riser-tube complex process of large aluminum alloy parts such as auxiliary frames, new energy battery boxes, missile cabins and the like can be met.
In order to achieve the purpose, the complete technical scheme of the invention comprises the following steps:
the low-pressure casting equipment with the continuous molten pool heat preservation furnace comprises a low-pressure casting equipment rack, wherein a multi-riser-tube continuous molten pool heat preservation furnace is arranged below the rack and is arranged on a track;
the multi-riser-tube continuous molten pool heat preservation furnace comprises a molten pool heat preservation furnace body, a multi-riser-tube furnace cover, a riser tube system, a furnace door, a furnace body tilting device, a radiation-type heating rod and a furnace body air inlet mechanism;
the molten pool type heat preservation furnace body is used for storing and preserving molten metal aluminum, and a refractory heat preservation furnace lining is arranged on the furnace body;
the melting tank type heat preservation furnace body is provided with a plurality of independently separable liquid-lifting pipe furnace covers, and liquid-lifting pipe systems are arranged on the liquid-lifting pipe furnace covers, specifically, a plurality of liquid-lifting pipe connectors are arranged on the furnace covers; the plurality of riser pipe connectors form the riser pipe system, and the riser pipe connectors can be arranged at different positions and in different quantities according to the requirements of the casting process;
a plurality of mounting grooves are formed in the inner wall of the furnace cover, radiation type heating rods are mounted in the mounting grooves, and after the electrodes on two sides are electrified, the heating rods are heated and radiate and heat aluminum water;
and a thermocouple is arranged on the furnace body to monitor the temperature of the molten aluminum in real time, and the power of the heating rod is regulated and controlled according to the average temperature of the molten aluminum above the furnace body, the average temperature of the molten aluminum below the furnace body and the average temperature difference of the molten aluminum above and below the furnace body.
And a die change trolley is arranged on one side of the rack.
And a material taking device is arranged beside the die changing trolley.
And the multiple-riser furnace cover is provided with a riser system through a graphite packing.
The arrangement mode of the multiple riser pipe openings on the furnace cover is 4 in each row and 6 in total, the total number of the riser pipe openings is 24, and the riser pipe openings are uniformly distributed on the furnace cover.
The radiant heating bars are distributed between two adjacent rows of the plurality of lift tubes.
The number of the radiant heating rods is 7.
The specific mode of adjusting the power of the heating rod according to the average temperature of the upper aluminum water, the average temperature of the lower aluminum water and the average temperature difference of the upper aluminum water and the lower aluminum water in the furnace body is as follows:
an upper thermocouple and a lower thermocouple are respectively arranged above and below the furnace wall on one side back to the furnace door in the width direction of the furnace wall, an upper thermocouple and a lower thermocouple are respectively arranged above and below the furnace wall in the length direction of the furnace body, and the number of the thermocouples on the whole furnace body is 10;
the thermocouple temperature at the upper part in the width direction of the furnace body is recorded as
Figure DEST_PATH_IMAGE001
The corresponding lower thermocouple temperature is recorded
Figure 502DEST_PATH_IMAGE002
The temperatures of the four thermocouples at the upper part in the longitudinal direction are respectively recorded as
Figure DEST_PATH_IMAGE003
Figure 899187DEST_PATH_IMAGE004
Figure DEST_PATH_IMAGE005
Figure 219441DEST_PATH_IMAGE006
. The corresponding lower thermocouple temperatures are respectively noted
Figure DEST_PATH_IMAGE007
Figure 494565DEST_PATH_IMAGE008
Figure DEST_PATH_IMAGE009
Figure 606878DEST_PATH_IMAGE010
The power of the heating rod from the edge to the center is recorded as
Figure DEST_PATH_IMAGE011
Figure 535519DEST_PATH_IMAGE012
Figure DEST_PATH_IMAGE013
Figure 733282DEST_PATH_IMAGE014
Figure DEST_PATH_IMAGE015
Figure 418954DEST_PATH_IMAGE016
Figure DEST_PATH_IMAGE017
Wherein
Figure 385773DEST_PATH_IMAGE011
And
Figure 626262DEST_PATH_IMAGE017
the heating power of the heating device is the same,
Figure 701534DEST_PATH_IMAGE012
and
Figure 318460DEST_PATH_IMAGE016
the heating power of the heating device is the same,
Figure 670944DEST_PATH_IMAGE013
and
Figure 347913DEST_PATH_IMAGE018
the heating power of the heating rods is the same, and under the normal heating without additional regulation and control, the heating rods maintain constant heating power, specifically the heating power of the heating rod at the center
Figure 520268DEST_PATH_IMAGE014
As the reference power, the heating power ratio is normally set to
Figure 550672DEST_PATH_IMAGE011
Figure 757663DEST_PATH_IMAGE012
Figure 339954DEST_PATH_IMAGE013
Figure 265184DEST_PATH_IMAGE014
=1.31:1.22:1.15:1;
In the process of real-time monitoring, the thermocouple transmits the measured temperature value to the control system in real time, and if the control system finds that the temperature in the furnace is abnormal, the control system adopts the following mode to regulate and control:
taking the real-time temperature values of the upper 5 thermocouples
Figure DEST_PATH_IMAGE019
Figure 82968DEST_PATH_IMAGE003
Figure 144465DEST_PATH_IMAGE004
Figure 163236DEST_PATH_IMAGE005
Figure 310184DEST_PATH_IMAGE006
And calculating the average value to obtain the upper real-time average temperature value
Figure 72603DEST_PATH_IMAGE020
Taking the real-time temperature values of the 5 thermocouples below
Figure 863973DEST_PATH_IMAGE002
Figure 53646DEST_PATH_IMAGE007
Figure 687890DEST_PATH_IMAGE008
Figure 988421DEST_PATH_IMAGE009
Figure 883565DEST_PATH_IMAGE010
(ii) a And calculating the average value to obtain the lower real-time average temperature value
Figure DEST_PATH_IMAGE021
Setting a first threshold value with respect to an upper average temperature
Figure 978560DEST_PATH_IMAGE022
Second threshold value for lower average temperature
Figure DEST_PATH_IMAGE023
A third threshold value relating to the difference between the upper average temperature value and the lower temperature value
Figure 709886DEST_PATH_IMAGE024
When the upper real-time average temperature value is smaller than the first threshold value, i.e.
Figure DEST_PATH_IMAGE025
(ii) a And the lower real-time average temperature value is less than a second threshold value, i.e.
Figure 548529DEST_PATH_IMAGE026
(ii) a And the difference between the upper average temperature value and the lower temperature value is less than a third threshold value, i.e.
Figure DEST_PATH_IMAGE027
When so, a regulation condition is triggered.
The specific regulation and control means is to lift two edgesPower of the hot bar
Figure 173546DEST_PATH_IMAGE011
Figure 829655DEST_PATH_IMAGE012
The regulated power is respectively recorded as
Figure 172912DEST_PATH_IMAGE028
Figure DEST_PATH_IMAGE029
Is concretely provided with
Figure 80825DEST_PATH_IMAGE030
,
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Until the upper real-time average temperature value is less than the first threshold value, i.e.
Figure 432784DEST_PATH_IMAGE032
Or the lower real-time average temperature value is greater than a second threshold value, i.e.
Figure DEST_PATH_IMAGE033
Or the difference between the upper average temperature value and the lower temperature value is greater than a third threshold value, i.e.
Figure 869582DEST_PATH_IMAGE034
After the regulation is finished, the temperature equilibrium is realized through a conduction process.
The continuous molten pool heat preservation furnace performs pressurization and ventilation on the furnace through a furnace body air inlet mechanism; specifically, heating boxes are arranged on two sides of the furnace body of the molten pool furnace, a pressurized air inlet structure is arranged, and air passes through wiring electrodes of a plurality of heating rods.
Molten bath furnace structure be furnished with the furnace gate, continuous molten bath heat preservation stove annotates the aluminium water and clears up the incomplete aluminium water that leaves through the furnace gate, annotate and clear up the aluminium water and open through the furnace gate, continuous molten bath heat preservation stove is furnished with the device that verts, it is smooth and easy to guarantee to clear up the incomplete aluminium water that leaves through the furnace body device that verts.
Compared with the prior art, the low-pressure casting equipment with the continuous molten pool holding furnace has the advantages that:
1. according to the invention, the independent furnace covers are arranged for the molten pool type heat preservation furnace, so that flexible arrangement of a plurality of liquid lifting pipes can be realized, the low-pressure casting production of various large-scale complex aluminum alloy parts is met, and the qualification rate of the cast parts is obviously improved.
2. The furnace cover of the smelting furnace is designed into an independent structure, the requirements of different riser tube positions of more products are met by replacing the independent furnace cover on the basis of ensuring the universality of the layout of the riser tubes of the furnace cover, the universality rate of the whole equipment is improved, and the equipment cost of a factory is reduced.
3. The graphite packing structure is arranged at the liquid lifting pipe interface of the furnace cover of the smelting furnace, so that the sealing performance of the multi-liquid lifting pipe system can be effectively ensured, and the problem of air leakage of the equipment liquid lifting system is solved.
4. The pressurizing air inlet structures on two sides of the heating box of the furnace body of the molten pool furnace can prolong the service life of the wiring electrode and reduce the influence of air inlet on the uneven temperature of the multiple liquid lifting pipes.
5. The rear end of the molten pool furnace is provided with a small tilting mechanism, so that the inner cavity of the furnace body can be cleaned conveniently to retain molten aluminum.
6. The low-pressure casting equipment with the continuous molten pool heat preservation furnace is particularly suitable for casting large-scale aluminum alloy parts such as hollow integral aluminum alloy auxiliary frames with the size of more than 1 meter, new energy automobile battery boxes and the like, and remarkably improves the product quality and the qualification rate.
Drawings
FIG. 1 is a schematic view showing the overall construction of a low-pressure casting apparatus according to the present invention.
FIG. 2 is a schematic plan view of the continuous molten pool holding furnace of the present invention.
FIG. 3 is a schematic view of the three-dimensional structure of the continuous molten pool holding furnace of the present invention.
Detailed Description
The technical solutions of the present invention will be described in further detail below with reference to the drawings of the present invention, and it should be understood that the described embodiments are only illustrative and are not intended to limit the present application.
As shown in FIG. 1, the present invention discloses a low pressure casting apparatus with a continuous molten pool holding furnace, comprising: the low pressure casting equipment comprises a frame 1 of the low pressure casting equipment, wherein a plurality of lift tube holding furnaces 2 are arranged below the frame 1, the plurality of lift tube holding furnaces 2 are arranged on a track 3, a mold changing trolley 4 is arranged on one side of the frame 1, a material taking device is arranged beside the mold changing trolley 4, and a lift tube system consisting of a plurality of lift tubes is arranged at the top end of each of the plurality of lift tube holding furnaces.
As shown in fig. 2-3, the multi-riser furnace comprises a molten bath holding furnace body 5, a multi-riser furnace cover 6, a riser pipe system 7, a furnace door 8, a furnace body tilting device 9, a radiant heating rod 10 and a furnace body air inlet mechanism;
the melting tank type heat preservation furnace body 5 is used for storing and preserving molten metal aluminum, and a refractory heat preservation furnace lining is arranged on the furnace body;
the furnace body of the molten pool type heat preservation furnace is provided with the multiple independently separable liquid lifting pipe furnace covers 6, the furnace covers are provided with the multiple liquid lifting pipe orifices, in actual production, liquid lifting pipes in different positions and quantities can be selectively made to pass through the liquid lifting pipe orifices according to production and liquid lifting requirements of different large-scale components such as a new energy automobile battery box body, an auxiliary frame and the like, so that the process requirements of the multiple liquid lifting ports of different workpieces are met, particularly, the furnace covers and the furnace lining of the heat preservation furnace body are independently designed, the furnace covers can be replaced according to requirements, and the universality of the multiple liquid lifting pipe molten pool furnace is improved at the lowest cost. A liquid lifting pipe system is arranged on the multi-liquid lifting pipe furnace cover through a graphite packing; the liquid lifting pipe system comprises a plurality of liquid lifting pipe interfaces, the liquid lifting pipe interfaces can be arranged at different positions and in different quantities according to the requirements of the casting process, and a furnace cover can also be integrally replaced, in a preferred embodiment, the arrangement mode is 4 for each row and 6 rows in total, 24 liquid lifting pipe interfaces are uniformly distributed on the furnace cover, and as shown in figure 3, the sealing structure of packing arranged on the liquid lifting pipe interfaces of the furnace cover well solves the problem of parallel sealing of the liquid lifting pipe system and a mold template, and prevents the defects of casting products caused by gas leakage.
Particularly, in order to ensure that the temperature in the molten pool furnace can meet the requirement of workpiece mold filling, a plurality of mounting grooves are formed in the inner wall of the furnace cover, radiation type heating rods 10 are mounted in the mounting grooves, and after the electrodes on two sides are electrified, the heating rods are heated and radiate and heat aluminum water, so that the temperature of the aluminum water is ensured.
In the low-pressure casting production, the furnace temperature and the uniformity in a molten pool holding furnace are very critical to the quality of castings, and because the invention adopts a multi-liquid-lifting system with 24 liquid-lifting pipe openings, a brand-new design is required on the layout of liquid-lifting pipes and heating rods, the furnace temperature uniformity and the layout among the multiple liquid-lifting pipes are considered, and the universality of a furnace cover is improved.
The design idea and the specific implementation means of the temperature control system of the molten pool holding furnace are further explained below.
Firstly, the shape of the furnace body of the molten pool holding furnace, the design layout mode of a liquid lifting pipe and a heating rod on the furnace cover, the heating power, the heat preservation performance of the lining of the furnace body and the like are researched and analyzed;
the study finds that the furnace body used by the invention is in a cuboid shape, the heat dissipation directions of the molten aluminum are four lateral furnace walls and a lower furnace bottom, so the general trend of the molten aluminum temperature field is that the temperature of the molten aluminum at the center of the furnace body is higher than that at the edge of the furnace body, and meanwhile, the radiant heating rod is arranged on the furnace cover to carry out radiant heating on the molten aluminum, so that the temperature of the molten aluminum at the upper part is higher than that at the lower part.
In view of the above temperature field characteristics, in one embodiment of the present invention, the arrangement of the multiple riser ports on the furnace cover is 4 per row and 6 rows in total, the total number of the riser ports is 24, the riser ports are uniformly distributed on the furnace cover, and the radiant heating rods are distributed between two adjacent rows of the multiple riser pipes and 7 in total.
In order to accurately monitor the temperature of furnace water in real time, thermocouples are arranged on a furnace body to monitor the temperature in real time, and in order to avoid excessive influence on the production process, the structure of the whole low-pressure casting equipment is considered, so that an upper thermocouple and a lower thermocouple are respectively arranged above and below a furnace wall (the thermocouples cannot be arranged at the furnace door) on one side back to the furnace door in the width direction of the furnace wall, two upper thermocouples and two lower thermocouples are respectively arranged above and below the furnace wall in the length direction of the furnace body, and the number of the thermocouples on the whole furnace body is 10.
The thermocouple temperature at the upper part in the width direction of the furnace body is recorded as
Figure 965714DEST_PATH_IMAGE019
The corresponding lower thermocouple temperature is recorded
Figure 146159DEST_PATH_IMAGE002
The temperatures of the four thermocouples at the upper part in the longitudinal direction are respectively recorded as
Figure 135981DEST_PATH_IMAGE003
Figure 9259DEST_PATH_IMAGE004
Figure 327108DEST_PATH_IMAGE005
Figure 311244DEST_PATH_IMAGE006
. The corresponding lower thermocouple temperatures are respectively noted
Figure 906305DEST_PATH_IMAGE007
Figure 216064DEST_PATH_IMAGE008
Figure 21209DEST_PATH_IMAGE009
Figure 809036DEST_PATH_IMAGE010
The power of the heating rod from the edge to the center is recorded
Figure 383237DEST_PATH_IMAGE011
Figure 722951DEST_PATH_IMAGE012
Figure 749813DEST_PATH_IMAGE013
Figure 341331DEST_PATH_IMAGE014
Figure 770039DEST_PATH_IMAGE015
Figure 421600DEST_PATH_IMAGE016
Figure 76703DEST_PATH_IMAGE017
Because the furnace body has a substantially symmetrical structure, under normal conditions,
Figure 206333DEST_PATH_IMAGE011
and
Figure 489547DEST_PATH_IMAGE017
the heating power of the heating device is the same,
Figure 312010DEST_PATH_IMAGE012
and
Figure 438098DEST_PATH_IMAGE016
the heating power of the heating device is the same,
Figure 371418DEST_PATH_IMAGE013
and
Figure 509139DEST_PATH_IMAGE018
the heating power of the heating rods is the same, under the normal heating without additional regulation and control, each heating rod maintains constant heating power, the power setting mode which can ensure that the temperature of the molten aluminum from the center to the edge is relatively stable is determined by means of temperature field calculation, simulation analysis and the like, and the heating power of the heating rod at the center is used as the heating power of the heating rod at the center
Figure 768082DEST_PATH_IMAGE014
As reference power, under normal conditionsTo heat with a power ratio of
Figure 991253DEST_PATH_IMAGE011
Figure 603631DEST_PATH_IMAGE012
Figure 127016DEST_PATH_IMAGE013
Figure 25702DEST_PATH_IMAGE014
=1.31:1.22:1.15: 1; by the mode, higher heating power is applied to the aluminum liquid at the edge of the furnace body, so that the uniformity of the temperature in the furnace is ensured.
In the process of real-time monitoring, the thermocouple transmits the measured temperature value to the control system in real time, and if the control system finds that the temperature in the furnace is abnormal, the control system adopts the following mode to regulate and control:
taking the real-time temperature values of the upper 5 thermocouples
Figure 1748DEST_PATH_IMAGE019
Figure 276872DEST_PATH_IMAGE003
Figure 513818DEST_PATH_IMAGE004
Figure 848984DEST_PATH_IMAGE005
Figure 46748DEST_PATH_IMAGE006
And calculating the average value to obtain the upper real-time average temperature value
Figure 391141DEST_PATH_IMAGE020
Taking the real-time temperature values of the 5 thermocouples below
Figure 623539DEST_PATH_IMAGE002
Figure 736464DEST_PATH_IMAGE007
Figure 687103DEST_PATH_IMAGE008
Figure 304029DEST_PATH_IMAGE009
Figure 390934DEST_PATH_IMAGE010
And calculating the average value to obtain the lower real-time average temperature value
Figure 67903DEST_PATH_IMAGE021
Setting a first threshold value with respect to an upper average temperature
Figure 364892DEST_PATH_IMAGE022
Second threshold value with respect to the lower average temperature
Figure 785509DEST_PATH_IMAGE023
A third threshold value relating to the difference between the upper average temperature value and the lower temperature value
Figure 726920DEST_PATH_IMAGE024
When the upper real-time average temperature value is less than the first threshold value, i.e.
Figure 574790DEST_PATH_IMAGE025
(ii) a And the lower real-time average temperature value is less than the second threshold value, i.e.
Figure 500021DEST_PATH_IMAGE026
(ii) a And the difference between the upper average temperature value and the lower temperature value is less than a third threshold value, i.e.
Figure 334116DEST_PATH_IMAGE027
When so, a regulation condition is triggered.
The specific regulation and control means is to increase the power of two heating rods at the edge
Figure 395613DEST_PATH_IMAGE011
Figure 414384DEST_PATH_IMAGE012
The regulated power is respectively recorded as
Figure 295753DEST_PATH_IMAGE028
Figure 182806DEST_PATH_IMAGE029
Is concretely provided with
Figure 98810DEST_PATH_IMAGE030
,
Figure 554062DEST_PATH_IMAGE031
Until the upper real-time average temperature value is less than the first threshold value, i.e.
Figure 188305DEST_PATH_IMAGE032
Or the lower real-time average temperature value is greater than a second threshold value, i.e.
Figure 488837DEST_PATH_IMAGE033
Or the difference between the upper average temperature value and the lower temperature value is greater than a third threshold value, i.e.
Figure 134713DEST_PATH_IMAGE034
After the regulation is finished, the temperature equilibrium is realized through a conduction process.
In a preferred embodiment, the holding furnace is used for pressurizing and ventilating the furnace through a furnace body air inlet mechanism; the heating boxes are arranged on two sides of the furnace body of the molten pool furnace, the pressurized gas inlet structure is configured, and gas passes through the wiring electrodes of the plurality of heating rods, so that the temperature of the wiring electrodes can be reduced by the gas, the service life of the wiring electrodes is prolonged, and the problem that the casting process is influenced by the temperature unevenness of the plurality of lift tubes caused by gas inlet can be solved by heating the gas.
The furnace cover structure of the molten pool furnace is provided with the furnace door, the liquid lifting pipe on the furnace cover does not need to be detached in the process of adding molten aluminum, the occurrence of rapid cooling and rapid heating conditions is reduced, the service life of the liquid lifting pipe is effectively prolonged, and the production cost is reduced.
The heat preservation stove is annotated the aluminium water and is cleared up incomplete aluminium water through furnace gate 8, annotates and clears up the aluminium water and open through the furnace gate, is furnished with and verts the device 9 and verts and place the aluminium water in the furnace gate side wherein, rises through the furnace body and verts the device and guarantee that it is smooth and easy to clear up incomplete aluminium water.
The low-pressure casting equipment with the continuous molten pool holding furnace is particularly suitable for casting and producing large-size aluminum alloy parts such as large-size aluminum alloy auxiliary frames, new energy automobile battery boxes and the like.
The above applications are only some embodiments of the present application. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the invention.

Claims (9)

1. The low-pressure casting equipment with the continuous molten pool heat preservation furnace is characterized by comprising a low-pressure casting equipment rack, wherein a multi-riser-tube continuous molten pool heat preservation furnace is arranged below the rack and is arranged on a track;
the multi-riser-tube continuous molten pool heat preservation furnace comprises a molten pool heat preservation furnace body, a multi-riser-tube furnace cover, a riser tube system, a furnace door, a furnace body tilting device, a radiation-type heating rod and a furnace body air inlet mechanism;
the molten pool type heat preservation furnace body is used for storing and preserving molten metal aluminum, and a refractory heat preservation furnace lining is arranged on the furnace body;
the melting tank type heat preservation furnace body is provided with a multi-riser tube furnace cover which can be separated independently, a riser tube system is arranged on the multi-riser tube furnace cover, and specifically a plurality of riser tube interfaces are arranged on the furnace cover; the plurality of riser pipe connectors form the riser pipe system, and the riser pipe connectors can be arranged at different positions and in different quantities according to the requirements of the casting process;
a plurality of mounting grooves are formed in the inner wall of the furnace cover, radiation type heating rods are mounted in the mounting grooves, and after the electrodes on two sides are electrified, the heating rods are heated and radiate and heat aluminum water;
and a thermocouple is arranged on the furnace body to monitor the temperature of the molten aluminum in real time, and the power of the heating rod is regulated and controlled according to the average temperature of the molten aluminum above the furnace body, the average temperature of the molten aluminum below the furnace body and the average temperature difference of the molten aluminum above and below the furnace body.
2. The low pressure casting apparatus with a continuous bath holding furnace of claim 1, wherein the frame is provided with a mold change carriage on one side.
3. The low pressure casting apparatus with a continuous molten bath holding furnace of claim 2, wherein a take off device is provided alongside the mold change trolley.
4. The low pressure casting apparatus with a continuous bath holding furnace of claim 1, wherein the multiple riser furnace hood has a riser system arranged thereon by graphite packing.
5. The low pressure casting apparatus with a continuous bath holding furnace as claimed in claim 4, wherein the plurality of riser openings on the furnace cover are arranged in 4 rows and 6 rows for a total of 24 riser openings, and the riser openings are evenly distributed on the furnace cover.
6. A low pressure casting apparatus having a continuous bath holding furnace according to claim 5, wherein the radiant-type heating rods are arranged between two adjacent rows of the plurality of lift tubes.
7. The low-pressure casting apparatus with a continuous molten bath holding furnace as claimed in claim 5, wherein said radiant-type heating rods are 7 in number.
8. The low pressure casting apparatus with a continuous molten bath holding furnace according to claim 1, wherein the continuous molten bath holding furnace is pressure-ventilated to the furnace through a furnace body air intake mechanism; specifically, heating boxes are arranged on two sides of the furnace body of the molten pool furnace, a pressurized air inlet structure is arranged, and air passes through wiring electrodes of a plurality of heating rods.
9. The low pressure casting apparatus with a continuous molten pool holding furnace according to claim 1, wherein the furnace cover structure of the continuous molten pool furnace is provided with an aluminum charging port, the continuous molten pool holding furnace is used for charging aluminum water and cleaning residual aluminum water through a furnace door, the charging and cleaning aluminum water is opened through the furnace door, and the continuous molten pool holding furnace is provided with a tilting device which is lifted by a furnace body to ensure smooth cleaning of the residual aluminum water.
CN202210849779.9A 2022-07-20 2022-07-20 Low-pressure casting equipment with continuous molten pool heat preservation furnace Active CN115070016B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1827318C (en) * 1989-04-11 1993-07-15 Харьковский Научно-Исследовательский Институт Технологии Машиностроения Runner supplying system for low-pressure casting of large-sized ingots from aluminium alloys
JPH11221659A (en) * 1998-02-09 1999-08-17 Asahi Tec Corp Low pressure casting method and casting apparatus
CN203281849U (en) * 2013-06-24 2013-11-13 山东富通电气有限公司 Large-scale aluminum alloy low-pressure casting machine
CN104439161A (en) * 2014-12-18 2015-03-25 济南圣元机械工程有限公司 Low pressure casting machine
CN104874767A (en) * 2015-06-25 2015-09-02 成都富江机械制造有限公司 Multi-pipeline low-pressure and counter-pressure casting process and device
CN109014129A (en) * 2018-08-14 2018-12-18 昆山拓卡家居用品有限公司 A kind of molten aluminum holding furnace suitable for aluminum alloy car wheel low pressure casting
CN210877495U (en) * 2019-09-02 2020-06-30 佛山市南海奔达模具有限公司 Low-pressure casting lift tube transition structure
CN111804888A (en) * 2020-08-20 2020-10-23 北京航空航天大学 Wheel antigravity casting equipment with crucible heat preservation stove
CN215746356U (en) * 2021-08-24 2022-02-08 惠州市名博液态模锻有限公司 Multi-material-chamber casting equipment
CN114719612A (en) * 2022-04-08 2022-07-08 浙江万丰精密制造有限公司 Furnace cover plate mechanism provided with composite liquid lifting pipe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1827318C (en) * 1989-04-11 1993-07-15 Харьковский Научно-Исследовательский Институт Технологии Машиностроения Runner supplying system for low-pressure casting of large-sized ingots from aluminium alloys
JPH11221659A (en) * 1998-02-09 1999-08-17 Asahi Tec Corp Low pressure casting method and casting apparatus
CN203281849U (en) * 2013-06-24 2013-11-13 山东富通电气有限公司 Large-scale aluminum alloy low-pressure casting machine
CN104439161A (en) * 2014-12-18 2015-03-25 济南圣元机械工程有限公司 Low pressure casting machine
CN104874767A (en) * 2015-06-25 2015-09-02 成都富江机械制造有限公司 Multi-pipeline low-pressure and counter-pressure casting process and device
CN109014129A (en) * 2018-08-14 2018-12-18 昆山拓卡家居用品有限公司 A kind of molten aluminum holding furnace suitable for aluminum alloy car wheel low pressure casting
CN210877495U (en) * 2019-09-02 2020-06-30 佛山市南海奔达模具有限公司 Low-pressure casting lift tube transition structure
CN111804888A (en) * 2020-08-20 2020-10-23 北京航空航天大学 Wheel antigravity casting equipment with crucible heat preservation stove
CN215746356U (en) * 2021-08-24 2022-02-08 惠州市名博液态模锻有限公司 Multi-material-chamber casting equipment
CN114719612A (en) * 2022-04-08 2022-07-08 浙江万丰精密制造有限公司 Furnace cover plate mechanism provided with composite liquid lifting pipe

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