CN109500374A - A kind of low pressure casting die and its installation method with fibrous filter net - Google Patents
A kind of low pressure casting die and its installation method with fibrous filter net Download PDFInfo
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- CN109500374A CN109500374A CN201811496680.5A CN201811496680A CN109500374A CN 109500374 A CN109500374 A CN 109500374A CN 201811496680 A CN201811496680 A CN 201811496680A CN 109500374 A CN109500374 A CN 109500374A
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- China
- Prior art keywords
- low pressure
- filter net
- fibrous filter
- molten aluminum
- casting die
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a kind of low pressure casting die with fibrous filter net, low pressure lower mould bottom connects with stalk, and stalk lower part extends to equipment and keeps furnace, and equipment keeps furnace to be provided with molten aluminum；The upper end of low pressure lower mould, which is equipped with to fasten, low pressure casting die part of the upper die and side mold portion；Fibrous filter net is equipped between low pressure lower mould and low pressure casting die part of the upper die.This has the low pressure casting die of fibrous filter net, the structure of former low pressure casting die is not changed, fibrous filter net is equipped in low pressure casting die upper end, the filter screen can stop to enter the impurity in type chamber with molten aluminum when pressurization, it can also stop to enter the impurity in equipment holding liquid with molten aluminum when pressure release, impurity is reduced in terms of two and participates in molding, thus rejection rate caused by reducing because of sand holes defect；This has low pressure casting mould structure of fibrous filter net simply and strong operability.A kind of installation method of the low pressure casting die with fibrous filter net, step are simple and easy to operate.
Description
Technical field
The invention belongs to casting fields, are related to a kind of low pressure casting die and its installation method with fibrous filter net.
Background technique
In low pressure casting field, consecutive solidification condition is created by the way that cast gate is arranged at the thick big position of casting, realization is poured
Feeding of the mouth to casting.If there are thermal centers for casting moulding system distal end, feeding can be carried out by setting riser.For same
There are the casting of many places thermal center on face, and many places cast gate need to be arranged；More cast gate chargings at present are shunted comprising pouring basin and gate core point
Flow two kinds of process programs.There are the following problems for pouring basin technique: gas heating need to be arranged in pouring basin periphery, to reduce temperature of aluminum liquid
It loses, prevent gate freeze, increase energy consumption；Mold periphery temperature drift causes mold easy to crack, pouring basin and cast gate
Basin lid increases spare parts consumption vulnerable to molten aluminum corrosion failure；It is influenced by product structure, gate shape and ruler in pouring basin technique
Very little limited, otherwise cast gate easy freezing leads to not normally produce；Because of gas heating, cause mold periphery temperature higher, casting is solidifying
Gu radiating condition is limited during, causes production efficiency relatively low；Pouring basin gas heating is difficult to control, and is increased in production not
Ballast.Gate core technique can solve the problems, such as that above-mentioned pouring basin scheme exists, while be directed to the casting that there is complicated oil duct,
Gate core can be used as oil duct core pallet, organize core in advance, stablize oil duct size.But gate core technique machines sand in the casting of production
Eye defect causes useless ratio higher, in process because sand holes caused by the problem cause useless ratio to be up to 40% or more.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of low pressure casting with fibrous filter net is provided
Modeling tool and its installation method.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of low pressure casting die with fibrous filter net, including low pressure lower mould, part of the upper die and side mold portion,
Three fits together shape forming cavity and running channel, is equipped with gate core in running channel, low pressure lower mould is connected with type chamber by running channel
Logical, liquid to be cast successively can enter type chamber through low pressure lower mould and running channel；
Low pressure lower mould bottom connects with stalk, and stalk lower part extends to equipment and keeps furnace, and equipment keeps furnace
It is provided with molten aluminum；
Fibrous filter net is equipped between low pressure lower mould and part of the upper die.
Further, fibrous filter net is with a thickness of 0.2-0.5mm.
Further, the mesh size of fibrous filter net is (0.5-1.5) × (0.5-1.5) mm.
A kind of installation method of the low pressure casting die with fibrous filter net, comprising:
1) cast gate is blocked after being opened, the type chamber of low pressure casting die is cleaned out；
2) fibrous filter net is installed to the upper end of low pressure lower mould；
3) part of the upper die and the side mold portion of low pressure casting die are installed；
4) it pours.
Step 4) specifically includes:
Equipment is kept into the molten aluminum Liquid Level Pressure in furnace, molten aluminum is pressed into stalk and flow to low pressure lower mould and cast gate
Core is finally full of mold cavity；
When the molten aluminum Liquid Level Pressure time reaches the dwell time in equipment holding furnace, casting die is taken out in molten aluminum liquid level pressure release
The upper mold and side mold portion of tool take out casting workpiece；
When pressure release, not solidified molten aluminum is back to equipment and keeps in furnace in low pressure lower mould, the defeated and dispersed formation of gate core
Sand grains is blocked by fibrous filter net, and filtered molten aluminum flows into equipment and keeps in furnace.
Further, further includes:
When molten aluminum Liquid Level Pressure, molten aluminum liquid level rises, and the sand grains or aluminium slag in molten aluminum are blocked by fibrous filter net, filters
Molten aluminum afterwards enters mold cavity and participates in molding.
Compared with prior art, the invention has the following advantages:
A kind of low pressure casting die with fibrous filter net, does not change the structure of former low pressure casting die, only low
Casting mould upper end is pressed to be equipped with fibrous filter net, which can stop to enter the impurity in type chamber with molten aluminum when pressurization,
It can also stop to enter the impurity in equipment holding liquid with molten aluminum when pressure release, reduce impurity in terms of two and participate in molding, to reduce
Because of rejection rate caused by sand holes defect；This has low pressure casting mould structure of fibrous filter net simply and strong operability.
A kind of installation method of the low pressure casting die with fibrous filter net, step is simple and easy to operate, being capable of low pressure
The casting yields of casting mould.
Detailed description of the invention
Fig. 1 is the structure chart of the low pressure casting die with fibrous filter net of the invention；
Fig. 2 is the low pressure casting die superstructure enlarged drawing with fibrous filter net of the invention.
Wherein: 1- equipment keeps furnace；2- stalk；3- molten aluminum；4- low pressure lower mould；5- gate core；The first low pressure of 6-
Mold side form；7- cast gate；8- low pressure upper mould；9- the second low pressure mold side form；10- type cavity portion position；11- fibrous filter net.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, Fig. 1 is the structure chart of the low pressure casting die with fibrous filter net of the invention；Fiber should be had
The low pressure casting die of filter screen includes low pressure casting die part of the upper die and low pressure lower mould 4, is equipped with fiber between the two
Filter screen 11；Low pressure lower mould 4 connects with stalk 2, and stalk 2 is placed in equipment and keeps in furnace 1, and equipment is kept in furnace 1
Filled with molten aluminum 3；
Referring to fig. 2, Fig. 2 is low pressure casting die superstructure enlarged drawing of the invention；Low pressure casting die part of the upper die
With side mold portion 5, the first low pressure mold side form 6, cast gate 7, low pressure upper mould 8, the second low pressure mold side form 9 and type chamber 10.
A kind of installation method of the low pressure casting die with fibrous filter net, comprising the following steps:
1) cast gate, cleaning mold cavity 10 are blocked after being opened；
2) fibrous filter net 11 is placed to 4 top of low pressure lower mould；
3) sand core is in place；
4) molding casting.
Specific casting step is as described below:
Equipment keeps 3 Liquid Level Pressure of molten aluminum in furnace 1 when casting process, and molten aluminum 3 is pressed into stalk 2 and flow under low pressure mold
Mould 4 and gate core 5 are finally full of mold cavity 10；
The dwell time is determined according to the curdled appearance of casting and running gate system, when equipment keeps 3 liquid level of molten aluminum in furnace 1 to arrive
When pressing time reaches the technique dwell time, 3 liquid level pressure release of molten aluminum is given, the not solidified molten aluminum of low pressure lower mould 4, which is back to, to be set
It is standby to keep in furnace 1；
Generally at 700 DEG C~720 DEG C, 5 bottom surface of gate core is acted on by high temperature molten aluminum 3 temperature of molten aluminum for a long time, in sand core
Resin is thermally decomposed, and sand core strength reduces, and causes sand core defeated and dispersed, defeated and dispersed sand core is back in stalk with molten aluminum after pressure release；
5 lower part of gate core place fibrous filter net 11,11 thickness of fibrous filter net be optionally 0.2mm, 0.3mm or
0.5mm, mesh size be optionally 0.5mm × 0.5mm, 1mm × 1mm, 1mm × 1.5mm, 1.5mm × 1.5mm or 1mm ×
0.5mm；
When equipment pressure release, the sand grains of the defeated and dispersed formation of gate core 5 is blocked by fibrous filter net 11, can not be flowed into equipment and be kept furnace
It is interior, solve the problems, such as the source of sand holes defect；
When next circulation produces, when cleaning type chamber, falls into equipment and sand grains or aluminium slag in furnace etc. is kept to be kept off by filter screen
Firmly, it cannot be introduced into mold cavity, can effectively solve sand holes and dreg defect.
Sand holes defect mainly has following reason to generate: periods of low pressure gate core bottom is led to resin by high temperature molten aluminum heat effect
Decompose that sand core is defeated and dispersed, when equipment pressure release, defeated and dispersed sand grains flowed into stalk, in next production cycle sand grains with molten aluminum into
Enter mold cavity and remain in casting, the exposure of sand holes defect causes useless after processing.
And the fibrous filter net the reason of having prevented generation sand holes defect being arranged, the non-defective unit of low pressure casting workpiece can be improved
Rate.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. a kind of low pressure casting die with fibrous filter net, which is characterized in that including low pressure lower mould (4), upper mold portion
Divide and side mold portion, three fit together shape forming cavity (10) and running channel, gate core (5) be equipped in running channel, under low pressure mold
Mould (4) is connected with type chamber (10) by running channel, and liquid to be cast successively can enter type through low pressure lower mould (4) and running channel
Chamber (10)；
Low pressure lower mould (4) bottom connects with stalk (2), and stalk (2) lower part extends to equipment and keeps furnace (1), if
It is standby that furnace (1) is kept to be provided with molten aluminum (3)；
Fibrous filter net (11) are equipped between low pressure lower mould (4) and part of the upper die.
2. the low pressure casting die according to claim 1 with fibrous filter net, which is characterized in that fibrous filter net
(11) with a thickness of 0.2-0.5mm.
3. the low pressure casting die according to claim 1 or 2 with fibrous filter net, which is characterized in that fiber filter
The mesh size of net (11) is (0.5-1.5) × (0.5-1.5) mm.
4. a kind of installation method of the low pressure casting die according to claim 1 with fibrous filter net, feature exist
In, comprising:
1) cast gate is blocked after being opened, the type chamber (10) of low pressure casting die is cleaned out；
2) upper end of fibrous filter net (11) to low pressure lower mould (4) is installed；
3) part of the upper die and the side mold portion of low pressure casting die are installed；
4) start to pour.
5. the installation method of the low pressure casting die according to claim 4 with fibrous filter net, which is characterized in that step
It is rapid 4) to specifically include:
Equipment is kept into molten aluminum (3) Liquid Level Pressure in furnace (1), molten aluminum (3) is pressed into stalk (2) and flow to low pressure lower mould
(4) and gate core (5), finally it is full of mold cavity (10)；
When molten aluminum (3) the Liquid Level Pressure time reaches the dwell time in equipment holding furnace (1), casting is taken out in molten aluminum (3) liquid level pressure release
The upper mold and side mold portion of modeling tool, take out casting workpiece；
When pressure release, not solidified molten aluminum is back to equipment and keeps in furnace (1) in low pressure lower mould (4), gate core (5) defeated and dispersed shape
At sand grains blocked by fibrous filter net (11), filtered molten aluminum (3) flows into equipment and keeps in furnace (1).
6. the installation method of the low pressure casting die according to claim 4 with fibrous filter net, which is characterized in that step
It is rapid 4) further include:
When molten aluminum (3) Liquid Level Pressure, molten aluminum (3) liquid level rises, and the sand grains or aluminium slag in molten aluminum (3) are by fibrous filter net (11)
It blocks, filtered molten aluminum (3) enters mold cavity (10) and participates in molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496680.5A CN109500374A (en) | 2018-12-07 | 2018-12-07 | A kind of low pressure casting die and its installation method with fibrous filter net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496680.5A CN109500374A (en) | 2018-12-07 | 2018-12-07 | A kind of low pressure casting die and its installation method with fibrous filter net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109500374A true CN109500374A (en) | 2019-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811496680.5A Pending CN109500374A (en) | 2018-12-07 | 2018-12-07 | A kind of low pressure casting die and its installation method with fibrous filter net |
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| CN (1) | CN109500374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111515365A (en) * | 2020-04-24 | 2020-08-11 | 朱永全 | Motor rotor squirrel cage low-pressure copper casting equipment and copper casting method thereof |
-
2018
- 2018-12-07 CN CN201811496680.5A patent/CN109500374A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111515365A (en) * | 2020-04-24 | 2020-08-11 | 朱永全 | Motor rotor squirrel cage low-pressure copper casting equipment and copper casting method thereof |
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