CN106141137A - A kind of side core-pulling extruding die casting equipment and production method - Google Patents
A kind of side core-pulling extruding die casting equipment and production method Download PDFInfo
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- CN106141137A CN106141137A CN201610840223.8A CN201610840223A CN106141137A CN 106141137 A CN106141137 A CN 106141137A CN 201610840223 A CN201610840223 A CN 201610840223A CN 106141137 A CN106141137 A CN 106141137A
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- Prior art keywords
- core
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- frame
- extruding
- squeeze pin
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- 238000007711 solidification Methods 0.000 claims description 6
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- 238000007906 compression Methods 0.000 description 11
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Classifications
-
- 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
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/203—Injection pistons
Abstract
A kind of side core-pulling extruding die casting equipment, including cover half frame, dynamic model frame, is fixed with cover half core in cover half frame, is fixed with moving-mould-core in dynamic model frame, and the vertical material pipe that is provided with of cover half frame, injection rod is slidably matched with material pipe；Extrusion oil cylinder is horizontally fixed on cover half frame by connecting plate；Squeeze pin is connected by embracing ring with extrusion oil cylinder, and squeeze pin coordinates with extruding casing slip, and extruding liner horizontal is arranged on cover half in-core, and latch is fixed on cover half frame and is arranged on the rear side of extruding lining.The processing hole of engine support far-end is extruded by the way of squeeze pin uses extruding under molten metal half curdled appearance by the present invention, one is the hole before defining roughing, it is important that by the extruding to molten metal, the porosity making hole periphery is greatly lowered, and improves the mechanical strength of support.
Description
Technical field
The present invention relates to metal die-casting mold and production method, particularly to a kind of side core-pulling pressurizing unit and producer
Method.
Background technology
At present, automobile engine bracket produces usually through compression casting；Its feature is: die casting surface light under high pressure
Sliding, dense internal organization, intensity is high, and mechanical property is good；But, thicker for wall thickness, die casting that just typing is big, produced
Cheng Zhonghui runs into gas hole defect, and pore is primarily due to molten metal when with higher speed filling die cavity, and molten metal is at die cavity
Middle generation volume gas or gas cannot be discharged smoothly, thus produce bubble.Bubble cannot obtain bigger pressure in process of setting and make
With and formed gas hole defect disadvantageous to product, make bleb rate increase, directly affect product quality.Die casting engine support
Structure is complicated, and just typing is more, and pressure cannot obtain good transmission, and distalmost end die joint is complicated, and gas is difficult to get rid of, easily
Producing gas hole defect, and distal metal liquid filling temp is relatively low, poor fluidity, has cold burden risk, pressure from front end to far-end
During transmission, loss is relatively big, therefore remote organization cannot obtain the good action of pressure, causes remote organization loose, and the porosity is higher,
And distalmost end is just core-drawing hole position, hole requires higher for assembling bearing holes, intensity and interior tissue, and traditional moulds structure
And extrusion process mode cannot solve this problem so that automobile engine bracket intensity reduces.
Now use the mode of partial Pressure far-end directly to apply pressure to solve bleb defect, reduce the porosity,
Lifting bracket dense internal organization degree, improves support intensity.Owing to the use of local supercharging technology is become by most factories the most not
Ripe, conventional local compression structure is: squeeze pin carries out supercharging from mould main parting line vertical direction to product plane or boss,
This patent uses special pressurizing unit and technology mode to utilize the squeeze pin offside core-drawing hole surrounding tissue parallel with main parting line
Carry out local compression and molding, it is proposed that a kind of low-porosity side core-pulling hole local compression Die Casting mode.
Summary of the invention
For solving the deficiencies in the prior art, it is provided that a kind of low-porosity side core-pulling hole local compression die casting and preparation thereof
Method, present configuration is reasonable, can be effectively reduced the porosity of electromotor far-end core-drawing hole.
For achieving the above object, the present invention is by the following technical solutions:
A kind of side core-pulling extruding die casting equipment, including cover half frame, dynamic model frame, is fixed with cover half core, at dynamic model frame in cover half frame
Inside being fixed with moving-mould-core, the vertical material pipe that is provided with of cover half frame, injection rod is slidably matched with material pipe；Extrusion oil cylinder passes through connecting plate water
Level land is fixed on cover half frame；Squeeze pin is connected by embracing ring with extrusion oil cylinder, and squeeze pin coordinates with extruding casing slip, extruding
Liner horizontal is arranged on cover half in-core, and latch is fixed on cover half frame and is arranged on the rear side of extruding lining.
Above-mentioned a kind of side core-pulling extruding die casting equipment, the head rounding of described squeeze pin.
The production method of a kind of side core-pulling extruding die casting, comprises the following steps:
Step one: before carrying out filling type, extrusion oil cylinder moves back the initial position outside side core-pulling pass chamber with squeeze pin；
Step 2: injection rod promotes molten metal to move forward and is filled with die cavity, fills molten metal after type completes and makees at injection rod
Solidify with lower pressurize；
Step 3: after the molten metal solidification 2-4 second, when side core-pulling pass chamber surrounding metal liquid reaches semisolid, extrusion oil cylinder
Promoting that squeeze pin is horizontal forward extrudes, squeeze pin offside pore position presses, and utilizes squeeze pin front end fillet and extruding
The molten metal of pin side offside pore periphery is compressed；
Step 4: squeeze pin forward action is to extreme position, and keeps the pressure 6-8 action time second, and injection rod acts on simultaneously
Die cavity keeps the pressure 15-20 second；
Step 5: extruding die casting completes, and squeeze pin returns to original position under extrusion oil cylinder drives.
In prior art, the processing hole of the far-end of engine support is to use the mode loosed core to be processed, the periphery gas in hole
Porosity is higher.The processing hole of engine support far-end is solidified by the way of squeeze pin uses extruding by the present invention at molten metal half
Extruding under state, one is the hole before defining roughing, it is important that by the extruding to molten metal so that hole periphery
The porosity is greatly lowered, and improves the mechanical strength of support.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is squeeze pin attachment structure schematic diagram of the present invention.
Fig. 3 is the schematic diagram in squeeze pin mechanism of the present invention.
Fig. 4 is the schematic diagram that squeeze pin of the present invention arrives extruding end extreme position.
Fig. 5 is the schematic diagram of extruding force effect of the present invention.
Figure is labeled as: 1 dynamic model frame, 2 moving-mould-cores, 3 die cavities, the die cavity in the side core-pulling hole of 31 rack far ends, 4 material pipes, 5 pressures
Rhizoma Belamcandae, 6 cover half frames, 7 cover half cores, 8 armfuls of rings, 9 extrusion oil cylinders, the output shaft of 91 oil cylinders, 10 first connecting plates, 11 second connect
Plate, 12 squeeze pins, 13 latch, 14 extruding linings, the pore of 15 side core-pulling hole peripheries.
Detailed description of the invention
Referring to the drawings, a kind of side core-pulling extruding die casting equipment, including cover half frame 6, dynamic model frame 1, it is fixed with in cover half frame
Cover half core 7, is fixed with moving-mould-core 2 in dynamic model frame, and the vertical material pipe 4 that is provided with of cover half frame, injection rod 5 is slidably matched with material pipe；
Extrusion oil cylinder 9 is horizontally fixed on cover half frame by first connecting plate the 10, second connecting plate 11；Squeeze pin 12 and extrusion oil cylinder
Connecting by embracing ring 8, squeeze pin is slidably matched with extruding lining 14, and the head of squeeze pin is fillet, and extruding liner horizontal is installed
At cover half in-core, latch 13 is arranged on the rear side of extruding lining, is fixed on cover half frame.
The production method of a kind of side core-pulling extruding die casting, comprises the following steps:
Step one: before carrying out filling type, extrusion oil cylinder moves back the initial position outside side core-pulling pass chamber with squeeze pin；
Step 2: injection rod promotes molten metal to move forward and is filled with die cavity 3, injection rod promotes molten metal to move forward one
After set a distance, molten metal is filled and is arrived side core-pulling pass chamber, die cavity farthest 31, i.e. fills type and completes, fills molten metal after type completes and exist
Pressurize solidification under injection rod effect；
Step 3: after the molten metal solidification 2-4 second, when side core-pulling pass chamber surrounding metal liquid reaches semisolid, extrusion oil cylinder
Promoting that squeeze pin is horizontal forward extrudes, squeeze pin offside pore position presses, and utilizes squeeze pin front end fillet and extruding
The molten metal of pin side offside pore periphery is compressed；
Step 4: squeeze pin forward action is to extreme position, and keeps the pressure 6-8 action time second, and injection rod acts on simultaneously
Die cavity keeps the pressure 15-20 second；
Step 5: extruding die casting completes, and squeeze pin returns to original position under extrusion oil cylinder drives.
Rear end hydraulic oil cylinder driving injection rod on die casting machine gives metal liquid certain pressure (60-100MPa), and keeps
Pressure a period of time, pressure is enable to be delivered to other position of filled die cavity, so that metal liquid is under high pressure effect
Cooled and solidified molding, and by interior tissue compression, pore compression.
But due to side core-pulling pass chamber 31 apart from injection rod farther out, and its die cavity gos deep into mould inside, uneven,
When causing filling, gas is piled up and cannot be discharged herein, and injection rod institute actuating pressure is difficult to be delivered to side core-pulling pass chamber at a distance
Place, causes gas hole defect around hole, distant place serious, it is impossible to being compressed so that product air holes rate rises, percent defective increases；
The technique now using offside core-drawing hole surrounding metal liquid local compression to apply at direct offside core-drawing hole die cavity pressure, comes
Directly will compress by pore herein, form the product that interior tissue is good；
In moving process, squeeze pin applies pressure to pore position, both sides, utilizes nose circle chamfering and squeeze pin side by two
Side pore compression, reduces the porosity
The most preferably preferable extrusion position of the core-drawing hole of rack far end is that hole is the most extruded, but will be due in actual production
The restriction of squeeze pressure, hole will not be by the most extruded, and remainder must also use machining to ensure the formed precision in hole.
Tradition die casting mode is that molten metal is pushed ahead order under the promotion of injection rod and filled die cavity, and loosing core now
Pin has goed deep in die cavity, pin diameter of loosing core, gos deep into distance and is loose core bearing holes actual diameter and length, and type to be filled completes and coagulates
Consolidation bundle after, rear end loose core hydraulic oil cylinder driving loose core pin extract out die cavity, complete the molding in side core-pulling hole with this.But is being produced from side core-pulling hole
Product distalmost end, it is impossible to obtain the pressure effect that front end drift passes over, and around bearing holes, die joint is complicated, uneven,
It is difficult to arrange exhaust apparatus, so place's interior tissue is loose, is easily formed gas hole defect.
Compared with conventional pressure casting, local compression die casting is divided into fills type stage and solidification stages, and at solidification 2-4 second gold
Belong to when liquid is semisolid and carry out pressurized effect, and pressurize 6-8 second, pore is extruded to zone of reasonableness, this scenario-frame
Simply, easy to use, efficiency is high, can realize cover half lateral aperture local compression function, when efficiently reducing core-drawing hole molding around produce
Raw pore problem, makes product air holes rate in Die Casting be reduced to 0.9%, and strength character is obviously improved.
The present invention by molten metal being extruded under half curdled appearance, not only complete tradition loose core pin molding effect
Really, also until reducing the porosity of far-end core-drawing hole.
Claims (3)
1. a side core-pulling extruding die casting equipment, including cover half frame, dynamic model frame, is fixed with cover half core, at dynamic model in cover half frame
Being fixed with moving-mould-core in frame, the vertical material pipe that is provided with of cover half frame, injection rod is slidably matched with material pipe；It is characterized in that extrusion oil cylinder
It is horizontally fixed on cover half frame by connecting plate；Squeeze pin is connected by embracing ring with extrusion oil cylinder, squeeze pin and extruding lining
Being slidably matched, extruding liner horizontal is arranged on cover half in-core, after latch is fixed on cover half frame and is arranged on extruding lining
Side.
2. a kind of side core-pulling extruding die casting equipment as claimed in claim 1, it is characterised in that the head rounding of described squeeze pin
Angle.
3. a production method for side core-pulling extruding die casting, comprises the following steps:
Step one: before carrying out filling type, extrusion oil cylinder moves back the initial position outside side core-pulling pass chamber with squeeze pin；
Step 2: injection rod promotes molten metal to move forward and is filled with die cavity, fills molten metal after type completes and makees at injection rod
Solidify with lower pressurize；
Step 3: after the molten metal solidification 2-4 second, when side core-pulling pass chamber surrounding metal liquid reaches semisolid, extrusion oil cylinder
Promoting that squeeze pin is horizontal forward extrudes, squeeze pin offside pore position presses, and utilizes squeeze pin front end fillet and extruding
The molten metal of pin side offside pore periphery is compressed；
Step 4: squeeze pin forward action is to extreme position, and keeps the pressure 6-8 action time second, and injection rod acts on simultaneously
Die cavity keeps the pressure 15-20 second；
Step 5: extruding die casting completes, and squeeze pin returns to original position under extrusion oil cylinder drives.
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| CN201610840223.8A CN106141137A (en) | 2016-09-22 | 2016-09-22 | A kind of side core-pulling extruding die casting equipment and production method |
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| CN201610840223.8A CN106141137A (en) | 2016-09-22 | 2016-09-22 | A kind of side core-pulling extruding die casting equipment and production method |
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| CN106623845A (en) * | 2017-01-12 | 2017-05-10 | 太仓海嘉车辆配件有限公司 | Die casting extrusion mechanism and method |
| CN107186195A (en) * | 2017-07-28 | 2017-09-22 | 芜湖永达科技有限公司 | A kind of local extrusion structure of die-cast rotor housing |
| CN109261931A (en) * | 2018-09-05 | 2019-01-25 | 襄阳美利信科技有限责任公司 | A kind of the second level Extrution casting technique and device of case of transmission |
| CN110640116A (en) * | 2018-06-27 | 2020-01-03 | 泰克纳里阿研究与创新基金 | Method and apparatus for manufacturing reinforced bimetallic casting composites |
| CN112475260A (en) * | 2020-11-20 | 2021-03-12 | 雄邦压铸（南通）有限公司 | Multi-extrusion-pin process for truck transmission controller shell |
| CN112872322A (en) * | 2021-02-23 | 2021-06-01 | 广州和德轻量化成型技术有限公司 | Local extrusion device of indirect extrusion casting die and preparation method thereof |
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| CN112872322A (en) * | 2021-02-23 | 2021-06-01 | 广州和德轻量化成型技术有限公司 | Local extrusion device of indirect extrusion casting die and preparation method thereof |
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Application publication date: 20161123 |