CN105014039B - A kind of die casting for improving sand hole distribution, extrusion process and the preparation method without sand hole product - Google Patents
A kind of die casting for improving sand hole distribution, extrusion process and the preparation method without sand hole product Download PDFInfo
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- CN105014039B CN105014039B CN201510525157.0A CN201510525157A CN105014039B CN 105014039 B CN105014039 B CN 105014039B CN 201510525157 A CN201510525157 A CN 201510525157A CN 105014039 B CN105014039 B CN 105014039B
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Abstract
The present invention relates to technical field of mold, disclose a kind of die casting for improving sand hole distribution, with front template, rear pattern plate, front cavity, rear cavity, front cavity is embedded at front template, rear cavity is embedded at rear pattern plate, when front template is with rear pattern plate matched moulds, the die cavity of front cavity merges to form at least one cast die cavity with the die cavity of rear cavity, at least one face is provided with the grid concave point for housing gas in the cast die cavity, the front template and rear pattern plate are provided with fortune water installations, this die casting can preferably control the distribution of sand hole, the product strength of production is high, conveniently in subsequent technique, sand hole is further processed, yields is high.
Description
Technical field
The present invention relates to technical field of mold, more particularly to a kind of die casting for improving sand hole distribution, extrusion process and
Preparation method without sand hole product.
Background technology
In die casting, in order to obtain preferably quality of item, it is necessary first to when being how control die casting of solution
The discharge problem of gas in die cavity, if preferably not solving the problems, such as die venting, during die casting, product occurs more sand
Hole, causes quality of item problem, and according to statistics, under the influence of sand hole, the yields of product is only 70% to existing die cast product；
In fact, what this sand hole was constantly present, at present, sand hole can only be as far as possible reduced, especially for product precision and surface requirements
In the case of higher, in die casting, the gas of mold cavity is always easily involved in mould stream, therefore existing die casting is always
Sand hole is difficult to control to, in view of this, a kind of industry problem that inventor exists for current die casting, it is proposed that improved mould
Lamps structure.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art, there is provided a kind of die casting for improving sand hole distribution, this
Die casting can preferably control the distribution of sand hole, so as to be conducive to improving the intensity of product；Meanwhile, present invention also offers
A kind of extrusion process, can reduce mould inside gas and enter in mould stream using this extrusion process, reduce the generation of sand hole；Separately
Outward, the present invention still further provides a kind of preparation method without sand hole product, so that product has intensity and table higher
Face precision.
To achieve the above object, it is of the invention it is a kind of improve sand hole distribution die casting, with front template, rear pattern plate,
Front cavity, rear cavity, front cavity are embedded at front template, and rear cavity is embedded at rear pattern plate, when front template is with rear pattern plate matched moulds, front mould
The die cavity of benevolence merges to form at least one cast die cavity with the die cavity of rear cavity, and at least one face is set in the cast die cavity
There is the grid concave point for housing gas, the front template and rear pattern plate are provided with fortune water installations.
Further, the cast die cavity has two, and described two cast die cavities are provided with Slide mechanism, the line position
Mechanism includes sliding block and the mold insert being fixedly connected with a slide block, and the front end insertion cast die cavity of the mold insert, the grid concave point sets
It is placed in the front end face of mold insert.
Further, the rear cavity is provided with flow passage structure, the flow passage structure include round platform protuberance, sprue and
At least two runners, the sprue and runner rounding off, the runner is arranged at round platform protuberance, described two
The guide part for reducing vortex, height of the sprue less than runner are provided between runner.
Further, the surface of the cast die cavity is coated with tungsten carbide coating.
Preferably, the cast die cavity is respectively arranged with ingate and overfall, the runner by ingate with
Cast die cavity is communicated, and the rear cavity is provided with the slag well communicated with overfall, and the slag well is connected with overflow launder, is owned
60% of the sectional area summation of overfall more than the sectional area summation of all ingates.
Further, the fortune water installations include being arranged at the first inlet channel, the second inlet channel, first water outlet of rear pattern plate
Road and the second water outlet, the rear cavity are provided with the first cooling water channel communicated with the first inlet channel and the first water outlet, with
And the second cooling water channel communicated with the second inlet channel and the second water outlet；
The front template is provided with the 3rd inlet channel, the 3rd water outlet, the 4th inlet channel and the 4th water outlet, the front mould
Benevolence is provided with the 3rd cooling water channel communicated with the 3rd inlet channel and the 3rd water outlet, and with the 4th inlet channel and the 4th
The 4th cooling water channel that water outlet is communicated, the 3rd cooling water channel, the " V "-shaped setting of the 4th cooling water channel.
A kind of extrusion process of die casting, comprises the technical steps that：
S1. it is die-filling, the die casting described in any of the above-described is installed on die casting board；
S2. heat, die casting is heated, make mold cavity temperature be 180 DEG C ~ 220 DEG C；
S3. die casting, die casting machine is by injection after metal melting to die casting；
S4. cool down, the cooling system of die casting carries out cooling and shaping to mold cavity；
S5. mold, mould is opened using die casting machine, eject product.
Further, between the step of S1 and S2, also including spraying process, die casting is opened, to die casting
Die cavity spraying releasing agent and dry up.
Further, in the die casting step of S3, the die casting machine first carries out low speed cast, then carries out high speed cast, most
Supercharging afterwards keeps.
A kind of preparation method without sand hole product, comprises the following steps：
The first step, manufactures the die casting as described in any one of claim 1 ~ 6；
Second step, the die casting is installed on die casting machine, the die carter described in usage right 7 ~ 8 any one of requirement
Skill production obtains being concentrated with sand hole the die cast product in face；
3rd step, milling or polishing are carried out by the sand hole concentration face of die cast product, and removal sand hole is obtained without sand hole die casting system
Product.
Beneficial effects of the present invention：Compared with prior art, a kind of die casting for improving sand hole distribution of the invention, this
Die casting can preferably control the distribution of sand hole, convenient sand hole is further processed in subsequent technique, so that
Be conducive to improving the intensity of product；Meanwhile, present invention also offers a kind of extrusion process, mould can be reduced using this extrusion process
Tool internal gas enter in mould stream, improve the yields of product, reduce the generation of sand hole；In addition, the present invention is furthermore provided
A kind of preparation method without sand hole product, die cast product that this method can more be concentrated to sand hole is processed, so that
Product has intensity and surface accuracy higher.
Brief description of the drawings
Fig. 1 is the structural representation of die casting of the present invention.
Fig. 2 is the mould structure schematic diagram of the rear pattern plate with rear cavity of die casting of the present invention.
Fig. 3 is the mould structure schematic diagram of the front template with front cavity of die casting of the present invention.
Fig. 4 is the insert structure schematic diagram of die casting of the present invention.
Fig. 5 is the cutaway view Amplified image of the grid concave point of die casting of the present invention.
Fig. 6 is the stereogram of the rear cavity of die casting of the present invention.
Fig. 7 is the stereogram of the front cavity of die casting of the present invention.
Fig. 8 is the fortune water installations sealing structure of die casting of the present invention.
Fig. 9 is the flow chart of casting process of the present invention.
Figure 10 is the control flow chart of the die casting step of casting process of the present invention.
Figure 11 is the production technological process without sand hole product of the invention.
Reference includes：
Front template -- 1, front cavity -- 11, the 3rd inlet channel -- 12, the 3rd water outlet -- 13, the 4th inlet channel -- 14, the
Four water outlets -- 15, rear pattern plate -- 2, rear cavity -- 21, the first inlet channel -- 22, the second inlet channel -- 23, the first water outlet --
24, the second water outlet -- 25, cast die cavity -- 3, grid concave point -- 31, ingate -- 32, overfall -- 33, slag well -- 34,
-- -- 4, sliding block -- 41, mold insert -- 42, fortune water installations -- 5, the first cooling water channel -- 51, second is cold for 35, Slide mechanism for overflow launder
But -- -- 53, the 4th cooling water channel -- 54, sealing ring -55, flow passage structure -- 6, round platform protrudes water channel for 52, the 3rd cooling water channel
Portion -- 61, sprue -- 62, runner -- 63, guide part -- 64.
Specific embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings.
Referring to Fig. 1 to Fig. 8, a kind of die casting of improvement sand hole distribution, with front template 1, rear pattern plate 2, front cavity 11,
Rear cavity 21, front cavity 11 is embedded at front template 1, and rear cavity 21 is embedded at rear pattern plate 2, during 2-in-1 with the rear pattern plate mould of front template 1,
The die cavity of front cavity 11 merges to form at least one cast die cavity 3 with the die cavity of rear cavity 21, in the cast die cavity 3 at least
One face is provided with the grid concave point 31 for housing gas, and the front template 1 and rear pattern plate 2 are provided with fortune water installations 5.This pressure
Operationally, aluminium liquid enters cast die cavity 3 to casting mould by flow passage structure 6, due to being provided with for housing in die cavity 3 is poured into a mould
The grid concave point 31 of gas, so, after aluminium liquid enters ingate 32, under being pushed further into of aluminium liquid, gas enters into net
In lattice concave point 31, when aluminium liquid travels further into grid concave point 31, gas can enter positioned at grid concave point 31 aluminium liquid in, into
After type, only product occurs sand hole with the corresponding protuberance of grid concave point 31, it is clear that this die cavity internal gas are concentrated
Processing mode, be conducive to making the sand hole of moulded products be located at same surface, be conducive to removing, it is to avoid because gas is in cast
Realize situation about fleeing in the inside of die cavity 3.The product of this die casting production, can be carried out in the later stage to the surface that sand hole is concentrated
Milling or polishing, so as to sand hole be purged；This mould is effectively reduced waste product, and yields is more than 92%, and business efficiency is bright
It is aobvious.
Specifically, the recess of the grid concave point 31 be trapezoidal shape, depth be 0.2 ~ 0.3mm, preferably 0.25mm, it is adjacent
Recess at intervals of 0.3 ~ 0.7mm, preferably 0.5mm；So, both ensure that gas can enter grid concave point 31, further
Into the salient point of product, make again in follow-up milling or polishing, processing capacity is smaller, in hgher efficiency.
Certainly, as a further improvement, die casting setting vacuum extractor can also be aided in, i.e. first to mould
Vacuumized in tool die cavity, substantial amounts of gas is extracted out, then operationally, the gas produced by aluminium material is only die casting
On a small quantity, in the presence of grid concave point 31, it is possible to achieve sand hole is concentrated,
In the technical program, the cast die cavity 3 has two, and described two cast die cavities 3 are provided with Slide mechanism
4, the Slide mechanism 4 includes sliding block 41 and the mold insert 42 being fixedly connected with sliding block 41, the front end insertion cast of the mold insert 42
Die cavity 3, the grid concave point 31 is arranged at the front end face of mold insert 42.Using this programme, can with one-shot forming multiple products, and incite somebody to action
The front end face that grid concave point 31 is arranged at mold insert 42 is conducive to working process, and the grid concave point 31 is processed using existing galvanic corrosion
Technique is obtained, here, no longer separately illustrating.
In compression mod field, due to the reason such as structure of mold runner, in cast, vortex is susceptible to, in this skill
In art scheme, the rear cavity 21 is provided with flow passage structure 6, and the flow passage structure 6 includes round platform protuberance 61, the and of sprue 62
At least two runners 63, the sprue 62 and the rounding off of runner 63, the runner 63 are arranged at round platform protuberance
61, the guide part 64 for reducing vortex is provided between described two runners 63, the sprue 62 is less than runner 63
Height.In cast, aluminium stream is shunted by sprue 62 and in its end, two runners 63 is formed, due to its point
Runner 63 is arranged on round platform protuberance 61, and the aluminium liquid of sprue 62 is shunted, when aluminium stream forms whirlpool in the end of sprue 62
During stream, in the presence of guide part 64, the vortex of its formation is eliminated, aluminium stream is smoothly entered runner 63, greatly reduced
Because of the inspiratory phenomenon that vortex is produced, it is ensured that the more preferable shaping of product.
Because the die cavity of die casting operationally impacts, it is necessary to bear high temperature, high pressure etc., the table of the cast die cavity 3
Face is coated with tungsten carbide coating.The tungsten carbide coating is conducive to improving the high temperature resistant and corrosion resistance characteristic of cast die cavity 3.
In the technical program, the cast die cavity 3 is respectively arranged with ingate 32 and overfall 33, the runner 63
Communicated with cast die cavity 3 by ingate 32, the rear cavity 21 is provided with the slag well 34 communicated with overfall 33, described cold
Material well 34 is connected with overflow launder 35, and the sectional area summation of all overfalls 33 is more than the sectional area summation of all ingates 32
60%；If the sectional area of overfall 33 is represented with S, the sectional area of the ingate 32 represents that it is expressed as with formula with W：
S1+S2+S3…Sn>（W1+W2+W3+…Wn）*60%.Found through inventor's repetition test, this ingate 32 and overfall 33
Optimal deslagging effect can be played, slag well 34 is further played the effect for collecting melt cinder, furthermore it is also possible to enter one
What is walked sets up corresponding overfall 33 by front cavity 11 and front template 1, so as to be adapted with rear cavity 21 and rear pattern plate 2, to mould
The overflow effect of stream more preferably, reduces the internal pressure of mould.
In the technical program, the fortune water installations 5 include that the first inlet channel 22, second for being arranged at rear pattern plate 2 is intake
Road 23, the first water outlet 24 and the second water outlet 25, the rear cavity 21 are provided with and the first inlet channel 22 and the first water outlet
24 the first cooling water channels 51 for communicating, and the second cooling water channel 52 communicated with the second inlet channel 23 and the second water outlet 25；
First inlet channel 22, the second inlet channel 23, the first water outlet 24 and the second water outlet 25 and corresponding cooling-water machine or die casting
Machine cold water pipe is attached, and allows rear pattern plate 2 and rear cavity 21 preferably refrigerated product.
The front template 1 is provided with the 3rd inlet channel 12, the 3rd water outlet 13, the 4th inlet channel 14 and the 4th water outlet
15, the front cavity 11 is provided with the 3rd cooling water channel 53 communicated with the 3rd inlet channel 12 and the 3rd water outlet 13, with
And the 4th cooling water channel 54 communicated with the 4th inlet channel 14 and the 4th water outlet 15, the 3rd cooling water channel the 53, the 4th is cold
But the " V "-shaped setting of water channel 54.This " V " font is set can be such that the center of front cavity 11 is preferably cooled down.It is comprehensive
Upper described, this fortune water installations 5 can keep die casting with preferably operating temperature, reduce molding cycle, be conducive to improving and give birth to
Produce efficiency.
Simultaneously for the connection of above-mentioned inlet channel and cooling water channel, inventor additionally provides a kind of pressing for fortune water installations 5
Sealing structure, referring to Fig. 8, that is, will be respectively provided with sinking step, the sinking step content at the two-port of cooling water channel
It is equipped with sealing ring 55, the diameter of the depth less than sealing ring 55 of the sinking step, so that sealing ring 55 is loading sinking platform
After rank, its top can also expose certain position, and so, current template is attached fastening with front cavity or rear pattern plate with rear cavity
Afterwards, the position that it exposes will form preferably sealing, complete close between inlet channel, cooling water channel and water outlet so as to realize
Envelope, preferably prevents the leakage of cooling water, and in maintenance, it is only necessary to sealing ring 55 is changed, maintenance is more convenient.
Referring to Fig. 9, Figure 10, present invention also offers a kind of extrusion process of die casting, comprise the technical steps that：
Embodiment one.
S1. it is die-filling, die casting described in any of the above-described is installed on die casting board；
S2. heat, die casting is heated, make mold cavity temperature be 180 DEG C；
S3. die casting, by injection after metal melting to die casting, the metal is aluminium ingot, its melt temperature to die casting machine
It is 650 DEG C.
S4. cool down, the cooling system of die casting carries out cooling and shaping to mold cavity；
S5. mold, mould is opened using die casting machine, eject product.
Meanwhile, the step of S1 and S2 between, also including spraying process, die casting is opened, to the type of die casting
Chamber sprays releasing agent, and in order to prevent in cast immediately, the aluminium liquid of HTHP is easily formed to releasing agent and vaporized, so as to increase
The generation of gas, so, it is necessary to be dried up after releasing agent is sprayed, it is of course also possible to use the mode of drying.
Further, in the die casting step of S3, the die casting machine first carries out low speed cast, and the low speed cast is finger pressure
The tup of casting machine to runner speed, the speed be 0.4m/S, the low speed duration of pouring be 0.55S；High speed cast is carried out again, it is described
Cast at a high speed refers to filling of the ingate 32 to mold cavity, and the speed is 2.3m/S, and the high speed duration of pouring is 0.033S, finally
Mould is pressurized and is kept, its boost pressure is 330KN, the supercharging retention time is 7S.
Embodiment two.
S1. it is die-filling, die casting described in any of the above-described is installed on die casting board；
S2. heat, die casting is heated, make mold cavity temperature be 200 DEG C；
S3. die casting, by injection after metal melting to die casting, the metal is aluminium ingot, its melt temperature to die casting machine
It is 675 DEG C.
S4. cool down, the cooling system of die casting carries out cooling and shaping to mold cavity；
S5. mold, mould is opened using die casting machine, eject product.
Meanwhile, the step of S1 and S2 between, also including spraying process, die casting is opened, to the type of die casting
Chamber sprays releasing agent, and in order to prevent in cast immediately, the aluminium liquid of HTHP is easily formed to releasing agent and vaporized, so as to increase
The generation of gas, so, it is necessary to be dried up after releasing agent is sprayed, it is of course also possible to use the mode of drying.
Further, in the die casting step of S3, the die casting machine first carries out low speed cast, and the low speed cast is finger pressure
The tup of casting machine to runner speed, the speed be 0.5m/S, the low speed duration of pouring be 0.57S；High speed cast is carried out again, it is described
Cast at a high speed refers to filling of the ingate 32 to mold cavity, and the speed is 2.5m/S, and the high speed duration of pouring is 0.035S, finally
Mould is pressurized and is kept, its boost pressure is 350KN, the supercharging retention time is 8S.
Embodiment three.
S1. it is die-filling, die casting described in any of the above-described is installed on die casting board；
S2. heat, die casting is heated, make mold cavity temperature be 220 DEG C；
S3. die casting, by injection after metal melting to die casting, the metal is aluminium ingot, its melt temperature to die casting machine
It is 700 DEG C.
S4. cool down, the cooling system of die casting carries out cooling and shaping to mold cavity；
S5. mold, mould is opened using die casting machine, eject product.
Meanwhile, the step of S1 and S2 between, also including spraying process, die casting is opened, to the type of die casting
Chamber sprays releasing agent, and in order to prevent in cast immediately, the aluminium liquid of HTHP is easily formed to releasing agent and vaporized, so as to increase
The generation of gas, so, it is necessary to be dried up after releasing agent is sprayed, it is of course also possible to use the mode of drying.
Further, in the die casting step of S3, the die casting machine first carries out low speed cast, and the low speed cast is finger pressure
The tup of casting machine to runner speed, the speed be 0.6m/S, the low speed duration of pouring be 0.59S；High speed cast is carried out again, it is described
Cast at a high speed refers to filling of the ingate 32 to mold cavity, and the speed is 2.7m/S, and the high speed duration of pouring is 0.037S, finally
Mould is pressurized and is kept, its boost pressure is 370KN, the supercharging retention time is 9S.
Certainly, as a further improvement, die casting setting vacuum extractor can also be aided in, i.e. first to mould
Vacuumized in tool die cavity, substantial amounts of gas is extracted out, then operationally, the gas produced by aluminium material is only die casting
On a small quantity, in the presence of grid concave point 31, it is possible to achieve sand hole is concentrated, in sum, can further be subtracted using this technique
The sand hole of few product, the subsequent treatment to product provides the foundation.
Referring to Figure 11, invention further provides a kind of preparation method without sand hole product, comprise the following steps：
The first step, manufactures the die casting as described in above-mentioned any one；
Second step, the die casting is installed on die casting machine, is produced using foregoing any one extrusion process
Obtain being concentrated with sand hole the die cast product in face；
3rd step, milling or polishing are carried out by the sand hole concentration face of die cast product, and removal sand hole is obtained without sand hole die casting system
Product.
This preparation method without sand hole product, that is, have with reference to extrusion process of the invention acquirement using die casting
Sand hole concentrates on one or more surfaces die cast product（In general, one side is concentrated on）, then, then die cast product is corresponding
The face that sand hole is more concentrated carries out milling or polishing, and when die cast product size is smaller, the sand hole that it is produced is also corresponding shallower,
Using large-sized polishing, when die cast product size is larger, the sand hole that it is produced can be corresponding larger, at this moment, can be with
It is processed using CNC or milling machine etc., by sand hole milling except the surface and the precision that can obtain high light cleanliness.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to of the invention
Thought, will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Limitation.
Claims (4)
1. it is a kind of to improve the die casting that sand hole is distributed, with front template（1）, rear pattern plate（2）, front cavity（11）, rear cavity
（21）, front cavity（11）It is embedded at front template（1）, rear cavity（21）It is embedded at rear pattern plate（2）, front template（1）With rear pattern plate（2）
During matched moulds, front cavity（11）Die cavity and rear cavity（21）Die cavity merge to form at least one cast die cavity（3）, its feature exists
In：The cast die cavity（3）Interior at least one face is provided with the grid concave point for housing gas（31）, the front template
（1）And rear pattern plate（2）It is provided with fortune water installations（5）；
The rear cavity（21）It is provided with flow passage structure（6）, the flow passage structure（6）Including round platform protuberance（61）, sprue
（62）With at least two runners（63）, the sprue（62）With runner（63）Rounding off, the runner（63）If
It is placed in round platform protuberance（61）, two runners（63）Between be provided with for reduce vortex guide part（64）, the main flow
Road（62）Less than runner（63）Height；
The cast die cavity（3）It is two, described two cast die cavities（3）It is provided with Slide mechanism（4）, the Slide mechanism
（4）Including sliding block（41）And with sliding block（41）The mold insert being fixedly connected（42）, the mold insert（42）Front end insertion cast die cavity
（3）, the grid concave point（31）It is arranged at mold insert（42）Front end face.
2. the die casting that a kind of improvement sand hole according to claim 1 is distributed, it is characterised in that：The cast die cavity
（3）Surface be coated with tungsten carbide coating.
3. the die casting that a kind of improvement sand hole according to claim 1 is distributed, it is characterised in that：The cast die cavity
（3）It is respectively arranged with ingate（32）And overfall（33）, the runner（63）By ingate（32）With cast die cavity（3）
Communicate, the rear cavity（21）It is provided with and overfall（33）The slag well for communicating（34）, the slag well（34）It is connected with excessive
Chute（35）, all overfalls（33）Sectional area summation be more than all ingates（32）Sectional area summation 60%.
4. the die casting that a kind of improvement sand hole according to claim 1 is distributed, it is characterised in that：The fortune water installations
（5）Including being arranged at rear pattern plate（2）The first inlet channel（22）, the second inlet channel（23）, the first water outlet（24）Go out with second
Water channel（25）, the rear cavity（21）It is provided with and the first inlet channel（22）With the first water outlet（24）The first cooling water for communicating
Road（51）, and with the second inlet channel（23）With the second water outlet（25）The second cooling water channel for communicating（52）；
The front template（1）It is provided with the 3rd inlet channel（12）, the 3rd water outlet（13）, the 4th inlet channel（14）With the 4th water outlet
Road（15）, the front cavity（11）It is provided with and the 3rd inlet channel（12）With the 3rd water outlet（13）The 3rd cooling for communicating
Water channel（53）, and with the 4th inlet channel（14）With the 4th water outlet（15）The 4th cooling water channel for communicating（54）, the described 3rd
Cooling water channel（53）, the 4th cooling water channel（54）" V "-shaped setting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510525157.0A CN105014039B (en) | 2015-08-25 | 2015-08-25 | A kind of die casting for improving sand hole distribution, extrusion process and the preparation method without sand hole product |
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| CN201510525157.0A CN105014039B (en) | 2015-08-25 | 2015-08-25 | A kind of die casting for improving sand hole distribution, extrusion process and the preparation method without sand hole product |
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| CN105014039B true CN105014039B (en) | 2017-05-31 |
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| CN106735068B (en) * | 2016-12-29 | 2019-02-15 | 宁波环亚机械制造有限公司 | The pressure casting method of automobile engine cylinder cover |
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| JPH09327761A (en) * | 1996-06-12 | 1997-12-22 | Toshiba Mach Co Ltd | Injection molding method and its die device |
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| CN105014039A (en) | 2015-11-04 |
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