CN110695340A - Tilting pouring method and device for low-pressure casting - Google Patents
Tilting pouring method and device for low-pressure casting Download PDFInfo
- Publication number
- CN110695340A CN110695340A CN201911176390.7A CN201911176390A CN110695340A CN 110695340 A CN110695340 A CN 110695340A CN 201911176390 A CN201911176390 A CN 201911176390A CN 110695340 A CN110695340 A CN 110695340A
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- Prior art keywords
- cavity
- liquid
- flashboard
- mold
- filling channel
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- 238000005266 casting Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000007711 solidification Methods 0.000 claims abstract description 8
- 230000008023 solidification Effects 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000005429 filling process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A tilting pouring method and a device for low-pressure casting are disclosed, wherein a cavity is clamped by a clamp, and a liquid filling channel of the cavity is matched with a liquid lifting pipe; by pressurizing the crucible furnace, the molten metal rises from the liquid lifting pipe and enters the cavity through the liquid filling channel for filling; the method is characterized in that: and arranging a flashboard on the liquid filling channel of the cavity, opening the flashboard during filling, closing the flashboard when filling is finished, immediately clamping the cavity by using a clamp to rotate so as to enable the opening of the liquid filling channel to be positioned at the upper part of the cavity, and taking a part after cooling, solidification and molding. According to the invention, through the rotation of the cavity, the sequential solidification of the casting from bottom to top is realized, so that a pressure maintaining or boosting procedure in the traditional process is not needed, the process is convenient to control, the production efficiency is high, and the volume of a riser can be greatly reduced; the die cavity can be made of materials with low iron sand ratio, so that the cost is saved.
Description
Technical Field
The invention relates to a metal low-pressure casting method, in particular to a tilting pouring method used in low-pressure casting.
Background
In the field of metal casting, particularly core assembly low-pressure casting, a mold filling channel is usually arranged at the bottom of a cavity and connected with a liquid lifting pipe in a furnace, and after mold assembly, bottom pouring is realized by pressurization. For example, chinese patent application CN107297484A discloses a low-pressure casting method of aluminum alloy, comprising the following steps: s1 preparing molten metal; detecting and preparing by an S2 device; s3 pressurizing, namely putting the molten metal into a holding furnace, adding a certain amount of aluminum powder into the holding furnace, fully stirring for 1-2 hours, then introducing gas with the pressure 0.01-0.05Mpa greater than the atmospheric pressure into the holding furnace to pressurize for 2-8 minutes, and immediately and rapidly increasing the pressure when the mold is filled to the top of the mold; s4 solidification forming, wherein the metal liquid is pressed into the die through a riser tube under the condition of pressurization, the die opening temperature is between 350 ℃ and 450 ℃, and the die closing time is 4-6 minutes; and S5 cooling and taking the parts.
In the low-pressure casting process, the mold is filled from the bottom upwards through the liquid lifting pipe, generally, when the mold filling is finished, in order to make the casting feeding, a 'pressure maintaining' procedure is needed, and the production efficiency is not high. In the technical scheme, in order to solve the feeding problem, when the mold is filled to the top end of the mold, rapid boosting is adopted for feeding, on one hand, the process control difficulty is increased, and on the other hand, the cavity needs to bear larger pressure, so that the iron-sand ratio needs to be increased when the cavity is manufactured, and the material cost of the cavity is increased.
Therefore, in order to improve the production efficiency and reduce the cost and the process difficulty, the pouring and mold filling method in low-pressure casting needs to be improved.
Disclosure of Invention
The invention aims to provide a tilting pouring method for low-pressure casting, which aims to solve the problem of production efficiency caused by feeding and reduce production cost.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a tilting pouring method for low-pressure casting adopts a clamp to clamp a cavity, so that a liquid filling channel of the cavity is matched with a liquid lifting pipe; by pressurizing the crucible furnace, the molten metal rises from the liquid lifting pipe and enters the cavity through the liquid filling channel for filling; and arranging a flashboard on the liquid filling channel of the cavity, opening the flashboard during filling, closing the flashboard when filling is finished, immediately clamping the cavity by using a clamp to rotate so as to enable the opening of the liquid filling channel to be positioned at the upper part of the cavity, and taking a part after cooling, solidification and molding.
Among the above-mentioned technical scheme, the pressurize or the process of stepping up when having cancelled prior art middle and low pressure casting pouring, through set up the flashboard on liquid filling channel, after filling the type, use the flashboard will fill the type passageway sealed, creatively rotates the die cavity and makes and fill the type passageway and be located upper portion to make the die cavity bottom that the temperature is the highest become upper portion, the foundry goods is from supreme cooling gradually solidification down, is favorable to realizing the foundry goods feeding.
According to the further technical scheme, a material level indicator is arranged on the upper portion of the cavity during filling, when the material level indicator detects molten metal, a signal for finishing filling is given, and the closing of the gate plate and the rotation of the cavity are controlled.
Preferably, the cavity is rotated by 90 degrees after the gate is closed, and the cavity is placed on a platform for natural cooling.
In order to realize the pouring method, the invention provides a tilting pouring device for low-pressure casting, which comprises a cavity and a crucible furnace, wherein a liquid lifting pipe, a heating device and a pressurizing device are arranged in the crucible furnace, the cavity is provided with a liquid filling channel matched with the liquid lifting pipe, and the liquid filling channel is provided with a flashboard which can be opened and closed; the mold cavity is clamped by a clamp, the clamp is provided with a rotating mechanism, when the rotating mechanism rotates to enable the mold cavity to be located at a first station, a liquid filling channel of the mold cavity and the liquid lifting pipe are located at the same position and located at a mold filling position, and when the rotating mechanism rotates to enable the mold cavity to be located at a second station, the liquid filling channel of the mold cavity is located at the upper portion of the mold cavity and located at a cooling position.
According to a further technical scheme, a material level device is arranged in the cavity and is positioned at the upper part of the cavity when the cavity is filled.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, through the rotation of the cavity, the sequential solidification of the casting from bottom to top is realized, so that a pressure maintaining or boosting procedure in the traditional process is not needed, the process is convenient to control, the production efficiency is high, and the volume of a riser can be greatly reduced;
2. according to the invention, the gate plate is arranged, so that the cavity can rotate before solidification;
3. because the pressure does not need to be increased, the die cavity can be made of materials with lower iron sand ratio, and the cost is saved.
Drawings
FIG. 1 is a schematic illustration of an embodiment of the present invention during mold filling;
FIG. 2 is a schematic illustration of an embodiment of the present invention as it cools.
In the figure: 1. a cavity; 2. a level indicator; 3. a shutter plate; 4. a riser tube; 5. a crucible furnace; 6. a liquid filling channel.
Detailed Description
The invention is further described with reference to the following figures and examples:
the first embodiment is as follows: a tilting type pouring device for low-pressure casting is disclosed, referring to figure 1, and comprises a cavity 1 and a crucible furnace 5, wherein a liquid lifting pipe 4, a heating device and a pressurizing device (not shown in the figure) are arranged in the crucible furnace, the cavity 1 is provided with a liquid filling channel 6 matched with the liquid lifting pipe 4, and the liquid filling channel 6 is provided with a shutter 3 which can be opened and closed; the cavity is clamped by a clamp (not shown in the figure), the clamp is provided with a rotating mechanism, when the rotating mechanism rotates to enable the cavity to be positioned at a first station, the liquid filling channel of the cavity and the liquid lifting pipe are positioned at the original positions and are positioned at the mold filling position, and when the rotating mechanism rotates to enable the cavity to be positioned at a second station, the liquid filling channel of the cavity is positioned at the upper part of the cavity and is positioned at the cooling position. A material level device 2 is arranged in the cavity 1, and the material level device 2 is positioned at the upper part of the cavity 1 when in a mold filling position.
Referring to fig. 1, the filling process is shown, in which the filling channel of the cavity is engaged with the lift tube; by pressurizing the crucible furnace, the molten metal rises from the liquid lifting pipe and enters the cavity through the liquid filling channel for filling the mold.
When the level indicator detects molten metal and gives a signal of filling the mold, the gate plate is controlled to move in the direction of P, and the liquid filling channel is closed. At the moment, the pressure in the crucible furnace is released, and continuous 'pressure maintaining' is not needed.
Referring to fig. 2, after the mold filling process is finished and the metal liquid is "gated", the clamp clamps the cavity to tilt and finally places the cavity as shown in fig. 2 without waiting, and at the moment, the temperature of the metal liquid at the top of the cavity is highest, and the casting is gradually cooled and solidified from bottom to top, so that the casting feeding is favorably realized.
Claims (5)
1. A tilting pouring method for low-pressure casting adopts a clamp to clamp a cavity, so that a liquid filling channel of the cavity is matched with a liquid lifting pipe; by pressurizing the crucible furnace, the molten metal rises from the liquid lifting pipe and enters the cavity through the liquid filling channel for filling; the method is characterized in that: and arranging a flashboard on the liquid filling channel of the cavity, opening the flashboard during filling, closing the flashboard when filling is finished, immediately clamping the cavity by using a clamp to rotate so as to enable the opening of the liquid filling channel to be positioned at the upper part of the cavity, and taking a part after cooling, solidification and molding.
2. The tilt casting method for low pressure casting according to claim 1, wherein: and a material level device is arranged at the upper part of the cavity during mold filling, and when the material level device detects molten metal, a signal for finishing mold filling is given out to control the closing of the flashboard and the rotation of the cavity.
3. The tilt casting method for low pressure casting according to claim 1, wherein: and after the flashboard is closed, the cavity rotates by 90 degrees and is placed on the platform for natural cooling.
4. The utility model provides a tilting type pouring device for low pressure casting, includes die cavity, crucible furnace, be equipped with stalk, heating device and pressure device in the crucible furnace, the die cavity has with stalk complex liquid filling passageway, its characterized in that: the liquid filling channel is provided with a flashboard which can be opened and closed; the mold cavity is clamped by a clamp, the clamp is provided with a rotating mechanism, when the rotating mechanism rotates to enable the mold cavity to be located at a first station, a liquid filling channel of the mold cavity and the liquid lifting pipe are located at the same position and located at a mold filling position, and when the rotating mechanism rotates to enable the mold cavity to be located at a second station, the liquid filling channel of the mold cavity is located at the upper portion of the mold cavity and located at a cooling position.
5. The tilting casting device for low pressure casting of claim 4, wherein: and a material level device is arranged in the cavity and is positioned at the upper part of the cavity when the cavity is filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911176390.7A CN110695340A (en) | 2019-11-26 | 2019-11-26 | Tilting pouring method and device for low-pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911176390.7A CN110695340A (en) | 2019-11-26 | 2019-11-26 | Tilting pouring method and device for low-pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110695340A true CN110695340A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911176390.7A Pending CN110695340A (en) | 2019-11-26 | 2019-11-26 | Tilting pouring method and device for low-pressure casting |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2533847A1 (en) * | 1982-10-05 | 1984-04-06 | Pont A Mousson | Method and installation for handling foundry moulds for the low-pressure casting of highly oxidisable metal alloys |
| JPH07124695A (en) * | 1993-11-08 | 1995-05-16 | Toyota Motor Corp | Casting device |
| CN103878343A (en) * | 2014-04-14 | 2014-06-25 | 苏州明志科技有限公司 | Self-sealing casting bent pipe for low-pressure tilting casting |
| CN104668515A (en) * | 2013-11-29 | 2015-06-03 | 无锡市双全机械制造厂 | Rotary multi-station low-pressure casting machine |
| CN211438053U (en) * | 2019-11-26 | 2020-09-08 | 苏州明志科技股份有限公司 | Tilting type pouring device for low-pressure casting |
-
2019
- 2019-11-26 CN CN201911176390.7A patent/CN110695340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2533847A1 (en) * | 1982-10-05 | 1984-04-06 | Pont A Mousson | Method and installation for handling foundry moulds for the low-pressure casting of highly oxidisable metal alloys |
| JPH07124695A (en) * | 1993-11-08 | 1995-05-16 | Toyota Motor Corp | Casting device |
| CN104668515A (en) * | 2013-11-29 | 2015-06-03 | 无锡市双全机械制造厂 | Rotary multi-station low-pressure casting machine |
| CN103878343A (en) * | 2014-04-14 | 2014-06-25 | 苏州明志科技有限公司 | Self-sealing casting bent pipe for low-pressure tilting casting |
| CN211438053U (en) * | 2019-11-26 | 2020-09-08 | 苏州明志科技股份有限公司 | Tilting type pouring device for low-pressure casting |
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