CN207343751U - It is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata - Google Patents
It is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata Download PDFInfo
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- CN207343751U CN207343751U CN201721221404.9U CN201721221404U CN207343751U CN 207343751 U CN207343751 U CN 207343751U CN 201721221404 U CN201721221404 U CN 201721221404U CN 207343751 U CN207343751 U CN 207343751U
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- die
- compression bar
- casting
- die casting
- aluminum alloy
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Abstract
The utility model discloses a kind of aluminum alloy die-casting die for eliminating contraction stomata, it is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata, including positioned at die casting top and with cavity upper mold, lower die positioned at die casting lower part, the core rod and top plate being arranged in lower die, there is ejection gap between top plate and lower die, the outer forming surface of the core rod is made of the first molded surface and the second molded surface, the wall thickness of die casting corresponding to second profiled surface is more than the wall thickness of the die casting corresponding to the first profiled surface, the core rod is equipped with feeding hole at the second profiled surface, the compression bar associated with a drive cylinder is axially displaceably equipped with the feeding hole, drive cylinder can make compression bar move axially to feeding position from shaping position.The utility model can effectively improve systolic depression and shrinkage hole problem on the premise of product design design is not changed, so as to improve the intensity and quality of die casting.
Description
Technical field
Aluminum alloy die-casting die technical field is the utility model is related to, can effectively be prevented in die casting more particularly, to one kind
It is interior to produce the aluminum alloy die-casting die for shrinking stomata.
Background technology
Aluminum alloy die-casting die generally includes upper die and lower die, and the cavity being adapted to the outside of product, lower die are set in upper mold
The core rod of the fit inside of upper setting and product, during die casting, upper and lower mould molding, at this time the interior forming surface of cavity and the outer of core rod into
Gap between type face is molding cavity, and the aluminium alloy liquid of high-temperature fusion shape is entered in molding cavity by cast gate, then is passed through
The cooling of supercooling system, you can form alloy product, then ejected product by ejecting mechanism.
Certain contraction can be produced when the liquid aluminium alloy in molding cavity is progressively cooling down, so that the shape in die casting
Into some shrinkage holes, and then reduce the intensity and quality of die casting.In order to improve the quality of die casting, die casting machine is carrying out die casting
During shaping can at the cast gate of die casting keep a lasting pressure, so as to die casting because be cooled into contraction progress
Feeding.Although this method can improve the shrinkage hole problem of die casting to a certain extent, so as to be conducive to improve the matter of die casting
Amount.But it is known that the aluminium alloy in molding cavity while cooling, the cooling of wall thickness thin location can be faster than wall thickness thicker part
Cooling, therefore, for some thickness on die casting are thicker or cross sectional dimensions has the position of mutation, its internal cooling can be slower than
Other positions, that is to say, that when the position of cast gate and other thinner thicknesses cools down substantially, in the thicker position of thickness
Portion not yet cools down, and at this time, the pressure that die casting machine is acted on the cast gate of die casting will be unable to be conducted to the thicker position of thickness,
Therefore, in the cooling procedure at the position, the aluminium alloy at cast gate will be unable to supplement and come, so that easily in die casting surface shape
Into systolic depression or produce shrinkage hole in inside die-casting part and influence the intensity and quality of die casting.
Although someone is modified by being formed to original die casting, so that the wall thickness of die casting keeps basic one
Cause, and then realize uniformly cooling down during die cast, to improve the quality of die casting, but design shape can not be changed for some
For the product of shape, the problem of still can not being effectively prevented from forming shrinkage hole at the thicker position of thickness.
Utility model content
The purpose of this utility model is easy to be thicker in wall thickness present in existing aluminum alloy die-casting die in order to solve
Position forms the problem of systolic depression and shrinkage hole, there is provided and it is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata, can be not
Change product design design on the premise of effectively improve systolic depression and shrinkage hole problem so that improve die casting intensity and
Quality.
To achieve these goals, the utility model uses following technical scheme：It is a kind of to eliminate the aluminium conjunction for shrinking stomata
Golden die casting, including positioned at die casting top and with the upper mold of cavity, the lower die positioned at die casting lower part, be arranged on
Core rod and top plate in lower die, have ejection gap, the outer forming surface of the core rod is by the first one-tenth between top plate and lower die
Type surface and the second molded surface are formed, and the wall thickness of the die casting corresponding to second profiled surface is more than the first profiled surface
The wall thickness of corresponding die casting, the core rod are equipped with feeding hole at the second profiled surface, can axially be moved in the feeding hole
The compression bar associated with a drive cylinder is equipped with dynamicly, and drive cylinder can make compression bar move axially to feeding position from shaping position
Put.
The second profiled surface that the utility model easily produces shrinkage hole by corresponding to die casting on core rod sets one
Feeding hole, and the compression bar associated with drive cylinder is set in feeding hole.In this way, when die cast, high-temperature fusion shape
After aluminium alloy liquid is filled in molding cavity, controller can act drive cylinder, so that compression bar stretches out, compression bar forms one
The effect of a similar plunger, forms a feeding pressure to the liquid aluminium alloy of thickness thicker part, makes easily to produce cooling originally
The thickness thicker position of shrinkage hole can obtain effective feeding effect, so as to avoid producing systolic depression and receipts because inhomogeneous cooling is even
Shrinkage cavity, greatly improves the quality of die casting, and need not change the original configuration design of product.
Preferably, the piston rod upper end in the drive cylinder is connected with compression bar, drive cylinder is stretched out on piston rod
Cylinder body and compression bar coupling part be threaded with adjusting nut and locking nut, when compression bar is in shaping position, the pressure
The end face of bar is less than the second profiled surface；When compression bar is in feeding position, the end face of the compression bar and the second profiled surface are neat
It is flat.
When the piston rod of drive cylinder forward extends out and when promoting compression bar to move, the end face of compression bar and the second profiled surface are neat
It is flat, so as to be conducive to improve the die casting surface quality after shaping.When the piston rod of drive cylinder drives gland retraction to be set to type
During position, cylinder body outer end face of the adjusting nut against drive cylinder.Particularly, the position by adjusting adjusting nut on the piston rod
Put, the retract stroke of piston rod can be limited, so that it is guaranteed that the feeding requirement of the stroke of compression bar and die casting is adapted.
Preferably, the end face of the compression bar is equipped with the small inner big stair-stepping liquid storage hole of mouth, the liquid storage hole it is small
The adaptive axis being axially movable is equipped with hole, the inner of adaptive axis is spacing equipped with that can be moved in the macropore of liquid storage hole
Disk, is equipped with the preloading spring for compressing position-arresting disk in the macropore of liquid storage hole.
In this way, we can suitably increase the stroke of compression bar, so that it is guaranteed that can be to not yet when compression bar is in feeding position
The die casting wall thickness thicker part of cooling forms lasting feeding pressure.Particularly, when compression bar reaches feeding position from shaping position
When putting, due to the not yet complete cooling meat of die casting at this time in place, the aluminium alloy being squeezed at this time can be to adaptive axis
A deboost is formed, so that adaptive axis overcomes the pretension elastic force of preloading spring and bounces back, then preloading spring then may be used
One lasting feeding pressure is formed to aluminium alloy, avoids the die casting of wall thickness thicker part from producing systolic depression in cooling procedure
With contraction stomata.Certainly, it would be desirable to make the pretension elastic force of preloading spring more than the aluminium alloy pressure suffered by adaptive axis.
Therefore, the utility model has the advantages that：Can be on the premise of product design design not be changed effectively
Improve systolic depression and shrinkage hole problem, so as to improve the intensity and quality of die casting.
Brief description of the drawings
Fig. 1 is that upper and lower mould is in the structure diagram for dividing mould state.
Fig. 2 is a kind of structure diagram of compression bar.
In figure：1st, upper mold 2, lower die 24, core rod 241, the first molded surface 242, the second profiled surface 25, feeding
Hole 3, top plate 31, ejection gap 4, compression bar 41, drive cylinder 411, adjusting nut 412, locking nut 42, liquid storage hole
43rd, adaptive axis 431, position-arresting disk 44, preloading spring.
Embodiment
The utility model is further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of eliminate the aluminum alloy die-casting die for shrinking stomata, it is suitable for shaping wall thickness mutation
Aluminum alloy die casting.Specifically include positioned at die casting top and there is upper mold 1, the lower die positioned at die casting lower part of cavity
2nd, the core rod 24 that is fixed in lower die and the top plate 3 positioned at lower die lower part with mandril, have between top plate and lower die
There is ejection gap 31.
In addition, the outer forming surface of core rod is divided into the first molded surface 241 and the second molded surface 242 by us, first
Profiled surface corresponds to die casting wall thickness thin location, and the second profiled surface corresponds to die casting wall thickness thicker part.That is,
The wall thickness of die casting corresponding to second profiled surface is more than the wall thickness of the die casting corresponding to the first profiled surface.In order to avoid
Die casting wall thickness thicker part produces systolic depression and shrinks stomata while cooling, we can set at the second profiled surface of core rod
The feeding hole 25 consistent with stripping direction is put, compression bar 4, the inner of compression bar and a driving oil are axially displaceably set in feeding hole
The piston rod of cylinder 41 is connected, so as to make compression bar move axially to feeding position from shaping position by drive cylinder.
When die cast, after the aluminium alloy liquid of high-temperature fusion shape enters and is full of molding cavity, controller can make drive
Dynamic cylinder action, so that compression bar stretches out, compression bar forms the effect of a similar plunger, to the liquid aluminium alloy of wall thickness thicker part
A feeding pressure is formed, the wall thickness thicker position for easily producing cooling meat hole originally is obtained effective feeding effect, from
And avoid producing systolic depression and shrinkage hole because inhomogeneous cooling is even, the quality of die casting is greatly improved, and without changing production
The original configuration design of product.That is, in the feeding stage, compression bar will store up a small amount of aluminium alloy supplement stayed in the opening of feeding hole
To die casting wall thickness thicker portion.It should be noted that we can rule of thumb judge or die trial result determines to need on die casting
The position of compression bar and corresponding feeding amount are set, so that it is determined that the shift motion of compression bar.
In order to adjust the flexible stroke of compression bar, we can stretch out drive cylinder cylinder body piston rod on compression bar connecting portion
Point be threadedly coupled an adjusting nut 411 and locking nut 412, adjusting nut and locking nut mutually snugly positioned at top plate and
In ejection gap between lower die, to facilitate the position of adjustment adjusting nut on the piston rod.When piston rod drives compression bar retraction
And when the compression bar is in shaping position, the end face of compression bar is less than the second profiled surface, and the gap in feeding hole is to be molded at this time
When feeding amount, and adjusting nut is against the end face of drive cylinder cylinder body；When the piston rod of drive cylinder forward extends out and push away
When dynamic pressure bar is moved to feeding position, the end face of compression bar and the second profiled surface flush, so as to can ensure that the die casting after shaping
Surface it is smooth.We can realize the self-locking of adjusting nut by tightening locking nut.
As shown in Fig. 2, we can also set the small inner big stair-stepping liquid storage hole 42 of mouth, liquid storage hole on the end face of compression bar
Aperture in the adaptive axis 43 that is axially movable is set, the inner of adaptive axis sets what can be moved in the macropore of liquid storage hole
Position-arresting disk 431, sets the preloading spring 44 for compressing position-arresting disk in the macropore of liquid storage hole.In this way, when compression bar is stretched from shaping position
When going out to feeding position, due to the not yet complete cooling meat of die casting at this time in place, the aluminium alloy being squeezed at this time can
One deboost is formed to adaptive axis, so that adaptive axis overcomes the pretension elastic force of preloading spring and bounces back, then in advance
Tight spring then can form a lasting feeding pressure to aluminium alloy, avoid the die casting of wall thickness thicker part from producing in cooling procedure
Raw systolic depression and contraction stomata.Certainly, it would be desirable to make the pretension elastic force of preloading spring more than the aluminium suffered by adaptive axis
Alloy pressure.And if the die casting after shaping forms a tiny technique column in liquid storage hole site, can easily it cut off
The technique column, so that it is guaranteed that die casting surface is smooth.
Claims (3)
1. a kind of eliminate the aluminum alloy die-casting die for shrinking stomata, including upper positioned at die casting top and with cavity
Mould, the lower die positioned at die casting lower part, the core rod and top plate being arranged in lower die, have ejection between top plate and lower die
Gap, the outer forming surface of the core rod are made of the first molded surface and the second molded surface, and the second profiled surface institute is right
The wall thickness for the die casting answered is more than the wall thickness of the die casting corresponding to the first profiled surface, it is characterized in that, the core rod is second
Feeding hole is equipped with profiled surface, the compression bar associated with a drive cylinder is axially displaceably equipped with the feeding hole, is driven
Dynamic oil cylinder can make compression bar move axially to feeding position from shaping position.
2. a kind of aluminum alloy die-casting die for eliminating contraction stomata according to claim 1, it is characterized in that, the driving
In-oil cylinder piston rod upper end is connected with compression bar, and the cylinder body and compression bar coupling part screw thread that drive cylinder is stretched out on piston rod connect
Adjusting nut and locking nut are connected to, when compression bar is in shaping position, the end face of the compression bar is less than the second profiled surface；When
When compression bar is in feeding position, the end face of the compression bar and the second profiled surface flush.
3. a kind of aluminum alloy die-casting die for eliminating contraction stomata according to claim 1, it is characterized in that, the compression bar
End face be equipped with the small inner big stair-stepping liquid storage hole of mouth, be equipped with the aperture of the liquid storage hole be axially movable it is adaptive
Axis, the inner of adaptive axis are equipped with the position-arresting disk that can be moved in the macropore of liquid storage hole, are equipped with and compress in the macropore of liquid storage hole
The preloading spring of position-arresting disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721221404.9U CN207343751U (en) | 2017-09-21 | 2017-09-21 | It is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721221404.9U CN207343751U (en) | 2017-09-21 | 2017-09-21 | It is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207343751U true CN207343751U (en) | 2018-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721221404.9U Expired - Fee Related CN207343751U (en) | 2017-09-21 | 2017-09-21 | It is a kind of to eliminate the aluminum alloy die-casting die for shrinking stomata |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207343751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523225A (en) * | 2021-06-08 | 2021-10-22 | 刘玉柱 | Aluminum alloy die-casting feeding method and die-casting die |
| CN114713787A (en) * | 2022-03-09 | 2022-07-08 | 美诺精密汽车零部件(南通)有限公司 | Die-casting die and die-casting process for local thin-wall part of automobile part |
-
2017
- 2017-09-21 CN CN201721221404.9U patent/CN207343751U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523225A (en) * | 2021-06-08 | 2021-10-22 | 刘玉柱 | Aluminum alloy die-casting feeding method and die-casting die |
| CN114713787A (en) * | 2022-03-09 | 2022-07-08 | 美诺精密汽车零部件(南通)有限公司 | Die-casting die and die-casting process for local thin-wall part of automobile part |
| CN114713787B (en) * | 2022-03-09 | 2023-06-02 | 美诺精密汽车零部件(南通)有限公司 | Die casting die and die casting process for partial thin-wall part of automobile part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20210921 |