CN111097888A - Double-pumping type vacuum die-casting system - Google Patents
Double-pumping type vacuum die-casting system Download PDFInfo
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- CN111097888A CN111097888A CN202010112358.9A CN202010112358A CN111097888A CN 111097888 A CN111097888 A CN 111097888A CN 202010112358 A CN202010112358 A CN 202010112358A CN 111097888 A CN111097888 A CN 111097888A
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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
- B22D17/14—Machines with evacuated die cavity
- B22D17/145—Venting means therefor
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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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- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a double-pumping vacuum die-casting system, which comprises a die-casting system, a vacuum system, a hydraulic system and an air pumping system, wherein a die-casting die and a vacuum valve matched with the die are arranged on a die-casting machine of the die-casting system, an exhaust block is arranged at the position of the top side of the die-casting die, an air passage is also arranged at the position, close to a sprue channel, on the die-casting die, and the air passage is communicated with the vacuum valve; the vacuum valve comprises a first insert, a second insert, a vertical elastic pin shaft and a transverse pin shaft which are matched with each other, wherein the vertical elastic pin shaft is arranged in the first insert and extends to the transverse pin shaft in the second insert, and the transverse pin shaft moves left and right to drive the vertical elastic pin shaft to move up and down to control the opening and closing of the valve body. The invention can realize rapid and large-scale exhaust in the vacuum die-casting process so as to reduce the defect of sand holes of cast products.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a double-pumping type vacuum die-casting system.
Background
The existing die-casting system has the advantages that the exhaust of a die-casting die is mainly carried out by an exhaust block at the upper side, the exhaust amount is small, only partial gas in a cavity can be extracted, the defects of sand holes and the like of products are often caused, the existing vacuum valve is arranged at the top of the die, and when the whole cavity is not filled with aluminum liquid, the air in the die is extracted, so that the purpose of reducing air holes is achieved. In practical work, especially for a product cavity with a complex shape, gas in the mold cavity is mainly concentrated in the material cylinder and the cavity, and a traditional vacuum valve is connected with the exhaust block and is difficult to exhaust a large amount of gas rapidly, so that the cavity product at the position of the sky side is easy to generate a gas hole defect by the exhaust mode.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages, the present invention provides a double-pumping vacuum die-casting system, in which an additional air passage is arranged at a sprue channel in a die-casting mold and connected to a vacuum valve, so as to achieve rapid and large-scale air exhaust during the casting process, thereby reducing the defect of sand holes in the cast product.
(II) technical scheme and beneficial effect
The above purpose is realized by the following technical scheme:
a double-pumping vacuum die-casting system comprises a die-casting system, a vacuum system, a hydraulic system and a pumping system,
the die-casting system comprises a die-casting machine and a die-casting die, all the systems are matched with the die-casting system, and the die-casting system can determine the closing time point of the air extraction switch;
the vacuum system comprises a vacuum valve, and the vacuum valve is mainly used for controlling the closing and the opening by the mutual movement of mechanical structures;
the hydraulic system comprises a hydraulic oil cylinder and provides force required by movement for the vacuum system;
the air pumping system comprises a vacuum pumping machine which is matched with a vacuum system to complete air pumping and air blowing;
a die casting die and a vacuum valve matched with the die are arranged on a die casting machine of the die casting system, and an exhaust block is arranged at the position of the sky side of the die casting die;
an air passage is also arranged on the die-casting die and close to the sprue channel, and the air passage is communicated with a vacuum valve;
the vacuum valve comprises a first insert, a second insert, a vertical elastic pin shaft and a transverse pin shaft which are matched with each other, wherein the vertical elastic pin shaft is arranged in the first insert and extends to the transverse pin shaft in the second insert, and the transverse pin shaft moves left and right to drive the vertical elastic pin shaft to move up and down to control the opening and closing of the valve body.
Preferably, the hydraulic system further comprises an energy storage tank, the hydraulic system is connected with the transverse pin shaft, and the energy storage tank is used for controlling the hydraulic system to be rapidly opened and closed and communicated with an air passage on the die-casting die.
Preferably, vertical elastic pin axle down includes portion of opening and shutting, air guide portion, first sealing, resilience portion, first inclined plane portion from last in proper order, the portion of opening and shutting is provided with decurrent inclination, and the external diameter of air guide portion is less than the external diameter of first sealing be provided with the air guide hole on the first of inserting in the outside of air guide portion, be provided with the spring in the resilience portion of first sealing below, the external diameter of first inclined plane portion top is identical with the internal diameter that the second of both sides was inserted, and first inclined plane portion bottom of below is provided with ascending slope inclination and is identical with the epaxial slope inclination of horizontal round pin.
Preferably, the transverse pin shaft sequentially comprises a second inclined plane part, a blocking boss and a transmission part from left to right, the inclination of the second inclined plane part is matched with that of the first inclined plane part, the blocking boss is arranged in the second insert and matched with the outer diameter of the second insert, and the transmission part is connected with the hydraulic mechanism.
Preferably, the first insert at the top of the vertical elastic pin shaft is provided with an air guide groove.
Preferably, a sealing ring is arranged at the top of the second insert block on the outer side of the vertical elastic pin shaft.
Preferably, a sealing ring is arranged on the second insert block on the inner side of the blocking boss.
Preferably, a movable connecting structure is arranged between the first inclined plane part and the vertical pin shaft.
Preferably, a movable connecting structure is arranged between the transmission part and the transverse pin shaft.
Compared with the traditional vacuum die-casting system, the vacuum die-casting system has the difficulty that the air extraction channel is arranged near the sprue channel for air extraction, and because the air extraction is carried out on the sprue channel, the air extraction action is carried out when slurry enters the material barrel, the air extraction channel can discharge a large amount of air in the material barrel, the air extraction channel and the die cavity, compared with the traditional vacuum die-casting system, the air extraction is started when the slurry enters the top of the die cavity, or the air extraction is carried out all the time at the top side, but the air extraction quantity is small, the speed is slow, the vacuum die-casting system has the obvious advantages that the improvement is carried out on the structure of the vacuum valve body and the opening.
The invention has the following beneficial effects:
according to the die-casting system provided by the invention, the air passage is arranged near the position of the sprue channel, and a large amount of air can be rapidly exhausted under the matching action of the vacuum valve, so that the defects of a cast product are greatly reduced; the vacuum valve arranged in the invention can be accurately controlled to be opened and closed under the coordination of the hydraulic system and the die-casting system, so that the mold cavity can be better exhausted.
Drawings
FIG. 1 is a schematic cross-sectional view of a vacuum valve;
FIG. 2 is a schematic sectional view of the vacuum valve in use;
FIG. 3 is a schematic view of a cross pin shaft;
FIG. 4 is a schematic front view of a preferred transverse pin arrangement;
FIG. 5 is a schematic view of a vertical elastic pin shaft;
FIG. 6 is a schematic view of a preferred vertical spring pin configuration;
FIG. 7 is a front view of the internal structure of the vacuum valve and the casting mold in use;
FIG. 8 is a schematic view of an insert structure;
in the figure: the structure comprises a first insert 1, an air guide groove 1-1, an air guide hole 1-2, a second insert 2, a vertical elastic pin shaft 3, an opening and closing part 3-1, an air guide part 3-2, a first sealing part 3-3, a rebound part 3-4, a first inclined plane part 3-5, a transverse pin shaft 4, a second inclined plane part 4-1, a blocking boss 4-2, a transmission part 4-3, an air passage 5, an air exhaust block 6, a sprue 7, a die cavity 8, a spring 9, a sealing ring 10 and an insert 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
referring to fig. 1 and 7, the transfer part 4-3 is connected with a hydraulic system matched with a die casting system, when die casting is performed, a hydraulic mechanism applies a rightward force to the transfer part to drive the whole transverse pin shaft to move leftward, the vertical elastic pin shaft moves upward under the pushing of the transverse pin shaft, so that the opening and closing part of the vertical elastic pin shaft 3 is opened with the first insert 1, the air guide groove 1-1 is communicated with an air passage 5 on the die cavity, the negative pressure equipment rapidly discharges a large amount of air in the die cavity, the material cylinder and the pumping channel through the air guide hole 1-2, when metal slurry reaches the air passage 5, the hydraulic mechanism rapidly returns, the vertical elastic pin shaft 3 is rapidly closed with the first insert 1 under the elastic force of the disc spring 9, and air in other die cavities is continuously discharged through the conventional exhaust block 6.
In the preferred scheme, a transmission signal connection is established between a hydraulic system and a die-casting system, the specific position is calculated according to the stroke of a charging barrel of the die-casting machine and is input into the die-casting machine, when an injection rod moves to a specified position, a signal is triggered to control an oil pump of the die-casting machine to supply to a hydraulic oil cylinder, the hydraulic oil cylinder starts to act again, the hydraulic system is provided with an energy storage tank, the hydraulic system is connected with a transverse pin shaft, and the hydraulic system is controlled to be opened and closed quickly through the energy storage tank.
Referring to fig. 4 and 6, the preferred embodiment of the transverse pin and the vertical elastic pin of the present invention employs a split structure, which is convenient for disassembly, replacement and installation.
Referring to fig. 7, an insert is arranged on the air passage, the insert is prior art, referring to fig. 8, the insert is a schematic structural diagram, and the insert can have multiple specifications, for example, a groove is arranged on an insert a, the depth of the groove can be changed to change the air suction amount, and aluminum liquid or other metal or nonmetal liquid can be blocked to prevent flying materials from entering the inside of the vacuum valve.
Fig. 1 and 2 are schematic partial cross-sectional views of a vacuum valve body, and fig. 7 is a front view of the interior of a half of a mold.
The working process of the double-pumping vacuum die-casting system is as follows:
1. closing the die casting machine, and starting up the machine in preparation (at the moment, the vacuum valve is opened, and only air suction action is not performed);
2. the injection rod is in the zero position, and the soup feeding machine drives the soup ladle to pour the aluminum liquid into the charging barrel;
3. after pouring the aluminum liquid, returning the feeding machine to the upper part of the furnace, and pushing the injection rod inwards;
4. the injection rod passes through a first travel switch, the vacuum valve is opened, a closed space is formed in the charging barrel, the vacuum machine starts to pump air (the vacuum valve and the exhaust block on the upper side simultaneously pump air at the moment), and air in the cavity, the flow channel and the charging barrel is pumped away at the highest speed;
5. when the aluminum liquid reaches the air exhaust hole of the vacuum valve, the nitrogen energy storage tank arranged at the top end of the machine table can quickly return the oil cylinder, and the vacuum valve stops working;
6. when the aluminum liquid reaches the exhaust hole of the exhaust block, the vacuum machine stops pumping air;
7. after the injection action is finished, opening the die of the die casting machine;
8. taking out the product by the manipulator, and then starting spraying by an automatic spraying machine;
9. the oil cylinder is pushed forward, the air suction hole of the vacuum valve is opened, the vacuum machine blows air outwards when working, and aluminum scraps possibly existing in the vacuum valve and the exhaust block are blown out, so that the vacuum valve is prevented from being blocked;
10. and (5) die assembling of the die casting machine, and repeating the above actions.
In summary, the present invention achieves the design objectives.
Claims (10)
1. A double-pumping vacuum die-casting system comprises a die-casting system, a vacuum system, a hydraulic system and a pumping system,
the die-casting system comprises a die-casting machine and a die-casting die;
the vacuum system includes a vacuum valve;
the hydraulic system comprises a hydraulic oil cylinder;
the air pumping system comprises a vacuum extractor;
the top side position of a die-casting die arranged on a die-casting machine of the die-casting system is provided with an exhaust block, and the die-casting system is characterized in that,
and an air passage (5) is also arranged on the die-casting die close to the sprue gate (7), and the air passage (5) is communicated with the vacuum valve.
2. The vacuum die casting system according to claim 1, wherein: the vacuum valve comprises a first insert (1) and a second insert (2) which are matched with each other, a vertical elastic pin shaft (3) and a transverse pin shaft (4), wherein the vertical elastic pin shaft (3) is arranged in the first insert (1) and extends to the second insert (2) on the transverse pin shaft (4), and the transverse pin shaft (4) moves left and right to drive the vertical elastic pin shaft (3) to move up and down to control the opening and closing of the valve body and communicate with an air passage on a die-casting die.
3. The vacuum die casting system according to claim 1, wherein: the hydraulic system further comprises an energy storage tank, and the hydraulic system is connected with the transverse pin shaft.
4. The vacuum die casting system according to claim 2, wherein: the vertical elastic hinge pin (3) sequentially comprises an opening and closing part (3-1), an air guide part (3-2), a first sealing part (3-3), a rebound part (3-4) and a first inclined plane part (3-5) from top to bottom, the opening and closing part (3-1) is provided with a downward inclination, the outer diameter of the air guide part (3-2) is smaller than the outer diameter of the first sealing part (3-3), an air guide hole (1-2) is formed in a first insert (1) on the outer side of the air guide part (1-2), a spring (9) is arranged in the rebound part (3-4) below the first sealing part (3-3), the outer diameter above the first inclined plane part (3-5) is matched with the inner diameter of the second insert (2) on two sides, and the bottom of the first inclined plane part (3-5) below is provided with an upward inclination and is matched with the inclination on the transverse hinge pin (4).
5. The vacuum die casting system according to claim 2 or 4, wherein: the transverse pin shaft (4) sequentially comprises a second inclined plane part (4-1), a blocking boss (4-2) and a transmission part (4-3) from left to right, the inclination of the second inclined plane part (4-1) is matched with that of the first inclined plane part (3-5), the blocking boss (4-2) is arranged in the second insert (2) and matched with the outer diameter of the second insert (2), and the transmission part (4-3) is connected with a hydraulic mechanism.
6. The vacuum die casting system according to claim 2 or 4, wherein: and a gas guide groove (1-1) is formed in the first insert (1) at the top of the vertical elastic pin shaft (3).
7. The vacuum die casting system according to claim 6, wherein: and a sealing ring is arranged at the top of the second insert (2) at the outer side of the vertical elastic pin shaft (3).
8. The vacuum die casting system according to claim 5, wherein: and a sealing ring is arranged on the second insert (2) at the inner side of the blocking boss (4-2).
9. The vacuum die casting system according to claim 5, wherein: and a movable connecting structure is arranged between the first inclined plane part (3-5) and the vertical pin shaft (3).
10. The vacuum die casting system according to claim 5, wherein: the transmission part (4-3) and the transverse pin shaft (4) are in a movable connection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112358.9A CN111097888A (en) | 2020-02-24 | 2020-02-24 | Double-pumping type vacuum die-casting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112358.9A CN111097888A (en) | 2020-02-24 | 2020-02-24 | Double-pumping type vacuum die-casting system |
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| Publication Number | Publication Date |
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| CN111097888A true CN111097888A (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010112358.9A Pending CN111097888A (en) | 2020-02-24 | 2020-02-24 | Double-pumping type vacuum die-casting system |
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| Country | Link |
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| CN (1) | CN111097888A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140579A (en) * | 2023-04-20 | 2023-05-23 | 宁波力劲科技有限公司 | Cold chamber die casting machine for producing thin-wall products |
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| CN107186194A (en) * | 2017-07-20 | 2017-09-22 | 广东鸿图武汉压铸有限公司 | A kind of vacuum valve die casting Vacuuming structure in parallel with exhaustion plate |
| CN206779407U (en) * | 2017-03-20 | 2017-12-22 | 广州米莱五金家具有限公司 | A kind of double cylinder evacuated die-casting process devices |
| CN206936320U (en) * | 2017-04-26 | 2018-01-30 | 广东鸿图武汉压铸有限公司 | A kind of fast replacing device of high vacuum die casting hydraulic valve |
| CN207154729U (en) * | 2017-08-09 | 2018-03-30 | 宁波市北仑辉旺铸模实业有限公司 | A kind of vacuum valve structure for compression mod |
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2020
- 2020-02-24 CN CN202010112358.9A patent/CN111097888A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0760426A (en) * | 1993-08-31 | 1995-03-07 | Hitachi Metals Ltd | Die casting machine and casting method by die casting |
| CN2278825Y (en) * | 1996-10-15 | 1998-04-15 | 费海鸿 | High-vacuum sampling valve |
| CN2518623Y (en) * | 2002-01-16 | 2002-10-30 | 征界自动化机械股份有限公司 | Vacuum valve of die casting machine |
| CN2719450Y (en) * | 2004-08-11 | 2005-08-24 | 杨然森 | Forming mould with striker and vacuum-pumping device |
| CN101954471A (en) * | 2010-09-06 | 2011-01-26 | 重庆硕龙科技有限公司 | High-pressure casting die cavity vacuumizing method with pressure supplementing function and device thereof |
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| JP5550613B2 (en) * | 2011-08-08 | 2014-07-16 | 株式会社ダイトク | Depressurization and oxygen filling equipment for PF die casting equipment |
| CN102950270A (en) * | 2012-11-09 | 2013-03-06 | 华中科技大学 | Multidirectional evacuating device for die-casting |
| CN102909335A (en) * | 2012-11-20 | 2013-02-06 | 广东鸿泰科技股份有限公司 | High-vacuum die casting device with bidirectional vacuumizing |
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| CN206779407U (en) * | 2017-03-20 | 2017-12-22 | 广州米莱五金家具有限公司 | A kind of double cylinder evacuated die-casting process devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140579A (en) * | 2023-04-20 | 2023-05-23 | 宁波力劲科技有限公司 | Cold chamber die casting machine for producing thin-wall products |
| CN116140579B (en) * | 2023-04-20 | 2023-09-05 | 宁波力劲科技有限公司 | Cold chamber die casting machine for producing thin-wall products |
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Application publication date: 20200505 |