CN108889921B - Mould vacuumizing device and corresponding vacuumizing operation process - Google Patents
Mould vacuumizing device and corresponding vacuumizing operation process Download PDFInfo
- Publication number
- CN108889921B CN108889921B CN201810730472.0A CN201810730472A CN108889921B CN 108889921 B CN108889921 B CN 108889921B CN 201810730472 A CN201810730472 A CN 201810730472A CN 108889921 B CN108889921 B CN 108889921B
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- water
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- tank
- vacuum tank
- rack
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- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000002893 slag Substances 0.000 claims abstract description 29
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000005485 electric heating Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000004512 die casting Methods 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
The mold vacuumizing device comprises a rack underfoot stay, a box support strip, a vacuum tank, a water storage tank, a lift pump and a water spray head. The vacuum tank is connected with the steam exhaust pipe, and the steam exhaust pipe is provided with a steam switch valve. The vacuum tank is provided with a vacuum-pumping tube, a slag-removing door and a mold vacuum-pumping valve. The vacuum tank is also communicated with a water inlet pipe, the water inlet pipe is provided with a water inlet valve, and cold water injected into the vacuum tank submerges the electric heating pipe and the bottom of the slag receiving groove but is lower than the upper end of the slag receiving groove. The upper bedplate of the frame is provided with water receiving tank coamings around the vacuum tank. The water storage tank is communicated with the water receiving tank. The process of the vacuum pumping operation comprises the following steps: injecting cold water, starting an electric heater to heat water in the vacuum tank, starting a lift pump to spray the cold water to the vacuum tank so as to form a certain negative pressure in the vacuum tank, closing the lift pump to stop spraying the vacuum tank in a negative pressure state, opening a mold vacuum-pumping valve to perform vacuum-pumping operation on the mold, and starting a new round of vacuum-pumping operation when the air pressure in the vacuum tank exceeds a certain value.
Description
Technical Field
The invention relates to a novel die vacuumizing device for vacuumizing and exhausting a die-casting die in die-casting production and a corresponding vacuumizing process.
Background
In the process of die casting, if air in a die casting die is not completely removed, the die casting product obtained by die casting production is easy to generate defects such as air holes, cold shut and the like. Therefore, the vacuum pumping device for the die-casting mold becomes an important production auxiliary device for die-casting production, and the important production auxiliary device has the main function of completely pumping and exhausting gas in the die-casting mold through the corresponding vacuum pumping device for the die-casting mold, so that the die-casting operation can be well completed, and the defects of air holes, cold insulation and the like of a product obtained through die-casting are avoided. However, the existing die-casting and casting vacuum-pumping equipment has the defects of large volume, large noise during working, energy conservation and the like. Therefore, how to reduce the volume of the die-casting vacuum-pumping equipment and reduce the noise and energy consumption of the die-casting vacuum-pumping equipment during operation is a problem to be solved in the die-casting technical field.
Disclosure of Invention
The first main invention purpose of the invention is to provide a die casting mold vacuumizing device which has small integral volume and convenient use; the second main purpose of the invention is to provide a process for carrying out vacuum-pumping operation on the die-casting die vacuum-pumping device.
The technical scheme of the mould vacuumizing device is as follows: a mold vacuumizing device comprises a rack, wherein the rack comprises an upper bedplate and rack legs. Four under-foot supporting strips of the rack are arranged at the lower ends of the rack feet. The frame feet are arranged above the frame foot lower supporting strips and below the lower plate surface of the frame upper bedplate, and four box supporting strips for supporting a box for placing an operating tool are arranged below the frame foot lower supporting strips. The box and the box supporting bar are fixedly or movably connected. When the box and the box supporting bar are fixedly connected, a box door is arranged on the box, and a handle structure is arranged on the box door. When the box is movably connected with the box supporting bars, the left end and the right end of the box are in rolling connection with the left box supporting bar and the right box supporting bar. The upper platen of the frame is provided with a vacuum tank, a water storage tank and a lift pump. A water spray head is arranged above the vacuum tank, one end of the water pipe is connected with the water storage tank, the other end of the water pipe is connected with the water spray head, and the lift pump is arranged on the water pipe. The upper end of the vacuum tank is connected with one end of a steam exhaust pipe, and the steam exhaust pipe is provided with a steam switch valve. The middle end of the vacuum tank is provided with a vacuum tube and a deslagging door, and the vacuum tube is provided with a mold vacuum valve. The lower end of the vacuum tank is communicated with the water inlet pipe, the water inlet valve is arranged on the water inlet pipe, cold water is injected into the vacuum tank through the water inlet pipe, and the cold water injected into the vacuum tank submerges the electric heating pipe and the bottom of the slag receiving groove arranged in the vacuum tank, but is lower than the upper end of the slag receiving groove. The upper bedplate of the frame is provided with water receiving tank coamings around the vacuum tank, and the water receiving tank coamings and the upper bedplate of the frame form a water receiving tank. The water storage tank is communicated with the water receiving tank, and cooling water sprayed to the vacuum tank falls into the water receiving tank and flows back to the water storage tank through the water receiving tank.
When the slag receiving tank works, cold water is firstly injected into the vacuum tank through the water inlet pipe, and the water level is added to the bottom of the slag receiving tank but is lower than the upper end of the slag receiving tank. And after water injection is finished, closing the water inlet valve, starting the electric heater, heating the water in the vacuum tank, simultaneously opening the steam switch valve, generating steam by the water along with the rise of the water temperature in the heating process, gradually extruding the air in the vacuum tank upwards, and discharging the air in the vacuum tank through the steam exhaust pipe until the water in the vacuum tank is boiled. At the moment, the vacuum tank is filled with steam, the corresponding steam switch valve is closed at proper time, the lift pump is started, and cold water spraying is carried out on the vacuum tank through the water pipe and the water spraying head, so that the steam in the vacuum tank disappears until a certain negative pressure is formed in the vacuum tank. At the moment, the lift pump is closed to stop spraying, spray water falling into the water receiving tank flows into the water storage tank through the water receiving tank, the vacuum tank is in a negative pressure state, the mold vacuumizing valve is opened at the moment, the vacuum tank can begin to vacuumize the mold, impurities in the gas discharged from the mold fall into the slag receiving tank in the vacuum tank, and the slag removing operation can be carried out on the slag receiving tank by regularly opening the slag removing door. The box for supporting and placing the operating tools is convenient for placing and managing the related operating tools, and is beneficial to improving the related operating efficiency and preventing the related operating tools from being lost. According to the invention, after one-time vacuum-pumping operation is completed, the vacuum tank in a vacuum state can carry out multiple times of vacuum-pumping operation on the corresponding mould until the vacuum degree of the vacuum tank does not meet the requirement, and then a new one-time vacuum-pumping operation is carried out on the vacuum tank. The invention has the advantages of small integral volume, convenient use, environmental protection, energy saving, low noise and low price and cost.
Preferably, the position of the slag removing door is lower than that of the vacuumizing tube.
Preferably, the two ends of each rack underfooting stay and box supporting stay are connected with the corresponding rack foot through welding or bolts. The optimal scheme has the advantages of simple structure, firmness and reliability; wherein the bolt connection also has the advantage of difficult deformation.
Preferably, the rack foot comprises an upper end of the rack foot and a lower end of the rack foot, and the upper end of the rack foot is in threaded connection with the lower end of the rack foot. This preferred scheme is convenient for carry out horizontal adjustment.
Preferably, two sets of devices for performing vacuum-pumping operation by using the vacuum tank and corresponding matching devices are arranged on the upper bedplate of the rack, and the two sets of devices for performing vacuum-pumping operation share the same water storage tank and the same water receiving tank. This preferred scheme guarantees that when one set of evacuating device was in evacuation work, another set of evacuating device was in waiting for next evacuation work to improve the efficiency of evacuation operation.
In conclusion, the beneficial effects of the mold vacuumizing device are as follows: the box for supporting and placing the operating tools is convenient for placing and managing the related operating tools, is beneficial to improving the related operating efficiency and prevents the related operating tools from being lost. The invention has the advantages of small integral volume, convenient use, environmental protection, energy saving, low noise and low price and cost.
The technical scheme adopted by the process of the vacuumizing operation of the mold vacuumizing device is as follows:
the first step is as follows: firstly, injecting cold water into the vacuum tank through a water inlet pipe, adding the water level to the bottom of the slag receiving groove but lower than the upper end of the slag receiving groove, completing water injection, and closing a water inlet valve;
the second step is that: starting an electric heater to heat water in the vacuum tank, simultaneously opening a steam switch valve, generating steam by the water along with the rise of water temperature in the heating process, gradually extruding air in the vacuum tank upwards, discharging the air in the vacuum tank through a steam exhaust pipe until the water in the vacuum tank is boiled, and filling steam in the vacuum tank at this time;
the third step: closing the corresponding steam switch valve, starting the lift pump, and starting cold water spraying on the vacuum tank through the water pipe and the water spraying head to make the water vapor in the vacuum tank disappear until a certain negative pressure is formed in the vacuum tank;
the fourth step: stopping spraying by closing the lift pump, wherein the spray water falling into the water receiving tank flows into the water storage tank through the water receiving tank, and the vacuum tank is in a negative pressure state;
the fifth step: opening a mold vacuumizing valve, starting vacuumizing operation on the mold by using a vacuum tank, and enabling impurities in gas exhausted from the mold to fall into a slag receiving groove in the vacuum tank; opening a deslagging door at regular intervals to butt the slag tank for deslagging;
and a sixth step: when the air pressure in the vacuum tank exceeds a certain value, the first step is returned to, and a new round of vacuum-pumping operation is started.
The process of the vacuumizing operation of the mold vacuumizing device has the advantages of reasonable work and high work efficiency.
Drawings
FIG. 1: the invention has a structure schematic diagram;
in the figure: the electric heating device comprises an electric heating pipe 1, a deslagging door 2, a vacuum-pumping pipe 3, a steam exhaust pipe 4, a steam switch valve 5, a water storage tank 6, a water spray head 7, a water pipe 8, a vacuum tank 9, a water inlet pipe 10, a rack 11, a rack upper bedplate 11.1, rack feet 11.2, a rack underfoot stay 11.3, a box support strip 11.4, a box 12, a handle structure 12.1 and a hinge 13.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Embodiment of the mold evacuation device:
as shown in fig. 1, the present invention includes a frame 11, the frame 11 includes an upper platen 11.1 and frame legs 11.2, and the frame 11 has four under-frame stays 11.3 at the lower ends of the frame legs 11.2. The machine frame foot 11.2 is provided with four box supporting bars 11.4 which are arranged above the lower supporting bar 11.3 of the machine frame foot and below the lower plate surface of the upper bedplate 11.1 of the machine frame and used for supporting a box 12 for placing operation tools. The box 12 is fixedly or movably connected with the box supporting bar 11.4. When the box 12 is fixedly connected with the box support bars 11.4, the lower ends of three side walls of the four side walls of the box 12 are welded with the corresponding box support bars 11.4, the upper ends of the three side walls of the box 12 are welded with the lower plate surface of the upper bedplate 11.1 of the rack, the other side wall is a box door, the lower end of the box door is hinged with the corresponding box support bars 11.4 through hinges 13, a lock catch structure which is not shown in the figure is arranged between the upper end of the box door and the lower plate surface of the upper bedplate 11.1 of the rack, and a handle structure 12.1 is further arranged on the box door. When the box 12 is movably connected with the box support bars 11.4, the left end and the right end of the box 12 are connected with the left box support bar 11.4 and the right box support bar 11.4 in a rolling way, a side wall of the box 12 is also provided with a handle structure, the rack and the box are simultaneously provided with a structure for preventing the box from falling off from the rack, and the upper edge of the box is about five millimeters away from the upper plate surface of the bedplate 11.1 on the rack. In this embodiment, the cassette 12 is fixedly connected to the cassette support strip 11.4. The upper bedplate 11.1 of the frame is provided with a vacuum tank 9, a water storage tank 6, a not-shown lift pump and a corresponding device matched with the lift pump. A water spray head 7 is arranged above the vacuum tank 9, one end of a water pipe 8 is connected with the water storage tank 6, the other end of the water pipe 8 is connected with the water spray head 7, and a lift pump is arranged on the water pipe 8. The upper end of the vacuum tank 9 is connected with one end of the steam exhaust pipe 4, and the steam exhaust pipe 4 is provided with a steam switch valve 5. The middle end of the vacuum tank 9 is provided with a vacuum tube 3 and a deslagging door 2, the vacuum tube 3 is provided with a mold vacuum valve, the position of the deslagging door 2 is lower than that of the vacuum tube 3, and the specific structure of the deslagging door 2 and other connection structures with the vacuum tank 9 are simple and are not repeated herein. The lower end of the vacuum tank 9 is communicated with a water inlet pipe 10, the water inlet pipe 10 is provided with a water inlet valve which is not shown in the figure, cold water is injected into the vacuum tank 9 through the water inlet pipe 10, and the cold water injected into the vacuum tank 9 submerges the electric heating pipe 1 and the bottom of a slag receiving groove arranged in the vacuum tank 9 but is lower than the upper end of the slag receiving groove. The upper bedplate 11.1 of the frame is provided with water receiving tank coamings which are not shown in the figure around the vacuum tank 9, and the water receiving tank coamings and the upper plate surface of the upper bedplate 11.1 of the frame form a water receiving tank. The water storage tank 6 is communicated with the water receiving tank, and the cooling water sprayed to the vacuum tank 9 falls into the water receiving tank and flows back to the water storage tank 6 through the water receiving tank. Preferably, two sets of devices for performing vacuum-pumping operation by using the vacuum tank 9 and corresponding matching devices are arranged on the upper bedplate 11.1 of the frame, and the two sets of devices for performing vacuum-pumping operation share the same water storage tank 6 and the same water receiving tank.
Preferably, the rack foot 11.2 comprises a rack foot upper end 11.21 and a rack foot lower end 11.2, and the rack foot upper end 11.21 is in threaded connection with the rack foot lower end 11.2. In this embodiment, each lower support bar 11.3 and each frame leg 11.2 are welded to the lower end of the upper end 11.21 of the frame leg, and the two ends of the box support bar 11.4 are welded to the corresponding frame legs 11.2.
An example of a process of evacuation work by a mold evacuation apparatus is:
the first step is as follows: firstly, injecting cold water into the vacuum tank through a water inlet pipe, adding the water level to the bottom of the slag receiving groove but lower than the upper end of the slag receiving groove, completing water injection, and closing a water inlet valve;
the second step is that: starting an electric heater to heat water in the vacuum tank, simultaneously opening a steam switch valve, generating steam by the water along with the rise of water temperature in the heating process, gradually extruding air in the vacuum tank upwards, discharging the air in the vacuum tank through a steam exhaust pipe until the water in the vacuum tank is boiled, and filling steam in the vacuum tank at this time;
the third step: closing the corresponding steam switch valve, starting the lift pump, and starting cold water spraying on the vacuum tank through the water pipe and the water spraying head to make the water vapor in the vacuum tank disappear until a certain negative pressure is formed in the vacuum tank;
the fourth step: stopping spraying by closing the lift pump, wherein the spray water falling into the water receiving tank flows into the water storage tank through the water receiving tank, and the vacuum tank is in a negative pressure state;
the fifth step: opening a mold vacuumizing valve, starting vacuumizing operation on the mold by using a vacuum tank, and enabling impurities in gas exhausted from the mold to fall into a slag receiving groove in the vacuum tank; opening a deslagging door at regular intervals to butt the slag tank for deslagging;
and a sixth step: when the air pressure in the vacuum tank exceeds a certain value, the first step is returned to, and a new round of vacuum-pumping operation is started.
The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.
Claims (1)
1. A process for carrying out vacuumizing operation by using a mould vacuumizing device is characterized by comprising the following steps:
the mold vacuumizing device comprises a rack (11), wherein the rack comprises a rack upper bedplate (11.1) and rack legs (11.2); four rack underfoot stays (11.3) are arranged at the lower ends of the rack feet of the rack; the rack feet are arranged above the rack foot lower supporting strips and four box supporting strips (11.4) used for supporting a box (12) for placing an operating tool are arranged below the lower plate surface of the rack upper bedplate; the box (12) is fixedly or movably connected with the box supporting bar; when the box is fixedly connected with the box supporting bars, a box door is arranged on the box, and a handle structure (12.1) is arranged on the box door; when the box is movably connected with the box supporting bars, the left end and the right end of the box are in rolling connection with the left box supporting bar and the right box supporting bar; a vacuum tank (9), a water storage tank (6) and a lift pump are arranged on the upper platen of the frame; a water spray head (7) is arranged above the vacuum tank, one end of a water pipe (8) is connected with the water storage tank, the other end of the water pipe is connected with the water spray head, and a lift pump is arranged on the water pipe; the upper end of the vacuum tank is connected with one end of a steam exhaust pipe (4), and a steam switch valve (5) is arranged on the steam exhaust pipe; the middle end of the vacuum tank is provided with a vacuum tube (3) and a deslagging door (2), and the vacuum tube is provided with a mold vacuum valve; the lower end of the vacuum tank is communicated with a water inlet pipe (10), the water inlet pipe is provided with a water inlet valve, cold water is injected into the vacuum tank through the water inlet pipe, and the cold water injected into the vacuum tank submerges the electric heating pipe (1) and the bottom of a slag receiving groove arranged in the vacuum tank but is lower than the upper end of the slag receiving groove; the upper bedplate of the frame is provided with water receiving tank coamings around the vacuum tank, and the water receiving tank coamings and the upper bedplate of the frame form a water receiving tank; the water storage tank is communicated with the water receiving tank, and cooling water sprayed to the vacuum tank falls into the water receiving tank and flows back to the water storage tank through the water receiving tank; the position of the slag removing door (2) is lower than that of the vacuumizing tube (3); two sets of devices for performing vacuum-pumping operation by using a vacuum tank (9) and corresponding matched devices are arranged on an upper bedplate (11.1) of the rack, and the two sets of devices for performing vacuum-pumping operation share the same water storage tank (6) and water receiving tank; wherein:
two ends of each rack underfoot stay (11.3) and each box supporting strip (11.4) are welded with the corresponding rack leg (11.2); both ends of each rack underfoot stay (11.3) and box supporting bar (11.4) are connected with the corresponding rack foot (11.2) through bolts;
frame foot (11.2) include frame foot upper end (11.21) and frame foot lower end (11.2), frame foot upper end (11.21) and frame foot lower end (11.2) threaded connection:
the process of the vacuum pumping operation comprises the following steps:
the first step is as follows: firstly, injecting cold water into the vacuum tank through a water inlet pipe, adding the water level to the bottom of the slag receiving groove but lower than the upper end of the slag receiving groove, completing water injection, and closing a water inlet valve;
the second step is that: starting an electric heater to heat water in the vacuum tank, simultaneously opening a steam switch valve, generating steam by the water along with the rise of water temperature in the heating process, gradually extruding air in the vacuum tank upwards, discharging the air in the vacuum tank through a steam exhaust pipe until the water in the vacuum tank is boiled, and filling steam in the vacuum tank at this time;
the third step: closing the corresponding steam switch valve, starting the lift pump, and starting cold water spraying on the vacuum tank through the water pipe and the water spraying head to make the water vapor in the vacuum tank disappear until a certain negative pressure is formed in the vacuum tank;
the fourth step: stopping spraying by closing the lift pump, wherein the spray water falling into the water receiving tank flows into the water storage tank through the water receiving tank, and the vacuum tank is in a negative pressure state;
the fifth step: opening a mold vacuumizing valve, starting vacuumizing operation on the mold by using a vacuum tank, and enabling impurities in gas exhausted from the mold to fall into a slag receiving groove in the vacuum tank; opening a deslagging door at regular intervals to butt the slag tank for deslagging;
and a sixth step: when the air pressure in the vacuum tank exceeds a certain value, the first step is returned to, and a new round of vacuum-pumping operation is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730472.0A CN108889921B (en) | 2018-07-05 | 2018-07-05 | Mould vacuumizing device and corresponding vacuumizing operation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730472.0A CN108889921B (en) | 2018-07-05 | 2018-07-05 | Mould vacuumizing device and corresponding vacuumizing operation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108889921A CN108889921A (en) | 2018-11-27 |
| CN108889921B true CN108889921B (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810730472.0A Expired - Fee Related CN108889921B (en) | 2018-07-05 | 2018-07-05 | Mould vacuumizing device and corresponding vacuumizing operation process |
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| Country | Link |
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| CN (1) | CN108889921B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2736491B2 (en) * | 1992-11-25 | 1998-04-02 | リョービ株式会社 | Method and apparatus for discharging gas in mold |
| CN1104302A (en) * | 1993-12-24 | 1995-06-28 | 肖国雄 | Method and device for pumping water by using steam |
| CN1131943C (en) * | 1998-05-06 | 2003-12-24 | 田炯贵 | Parallel multistage type hot water pump using water evaporation and condensation principle |
| CN201574789U (en) * | 2009-12-03 | 2010-09-08 | 上海梅山钢铁股份有限公司 | Drainage device of steam jet ejector |
| CN104690043A (en) * | 2014-05-22 | 2015-06-10 | 宁波职业技术学院 | Negative pressure generation method and negative pressure generation device |
| CN105252695B (en) * | 2015-10-29 | 2018-05-25 | 青岛金宝隆泡沫制品有限公司 | Foamed forming machine with drainage by suction system |
| CN106051681A (en) * | 2016-06-07 | 2016-10-26 | 宁波高新区世代能源科技有限公司 | Solar die-casting machine |
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2018
- 2018-07-05 CN CN201810730472.0A patent/CN108889921B/en not_active Expired - Fee Related
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Granted publication date: 20201117 |