CN106270407B - Solve the mold and method of metal mold Aerial-casting shrinkage porosite, slag inclusion - Google Patents
Solve the mold and method of metal mold Aerial-casting shrinkage porosite, slag inclusion Download PDFInfo
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- CN106270407B CN106270407B CN201610894763.4A CN201610894763A CN106270407B CN 106270407 B CN106270407 B CN 106270407B CN 201610894763 A CN201610894763 A CN 201610894763A CN 106270407 B CN106270407 B CN 106270407B
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- sand
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Abstract
The present invention relates to the molds for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, including sand core in die ontology, shell sand core and pipeline, it is characterized by: the shell sand core is made of the low precoated sand got angry, sand core is made of high-intensitive precoated sand in the pipeline.Invention additionally discloses the methods for solving metal mold Aerial-casting shrinkage porosite, slag inclusion.The present invention passes through the various technical methods of integrated use, including use the high-intensitive and low precoated sand got angry substitute common precoated sand, in rational deployment and the mold anti-melting of sand core surface brush Quench coating, the design of reasonable metal mold running channel, blind riser and slagging channel molten aluminum refining treatment, the shrinkage porosite in metal mold Aerial-casting production process and slag inclusion problem can be greatly decreased, the qualification rate of casting is made to reach 80% or more.
Description
Technical field
The present invention relates to the molds and method that solve metal mold Aerial-casting shrinkage porosite, slag inclusion, belong to aerial metal mold casting
Alloy field.
Background technique
Our factory produces a kind of aviation lid class casting at present, and cavity shape is complicated, size, fluorescence, x-ray class requirement
Height, and process rear surface and be not allow for any dreg defect.Existing technology is to be made using metal mold+sand core cast
Make the intracavitary core of type with precoated sand.Since the structure of casting is that curve deepens chamber, casting minimum wall thickness (MINI W.) is only 2mm, and cast material
For C355, poor fluidity leads to the defects of shrinkage porosite, slag inclusion occur in the part batch production process, seriously affect casting cost and
Shipping requires.
Summary of the invention
It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of contractings of solution metal mold Aerial-casting
Pine, the mold of slag inclusion and method, can be greatly decreased the shrinkage porosite in metal mold Aerial-casting production process and slag inclusion problem, make
The qualification rate of casting reaches 80% or more.
According to technical solution provided by the invention: solving the mold of metal mold Aerial-casting shrinkage porosite, slag inclusion, including mold sheet
Sand core in body, shell sand core and pipeline, it is characterised in that: the shell sand core is made of the low precoated sand got angry, the pipe
Sand core is made of high-intensitive precoated sand in road.
As a further improvement of the present invention, the low precoated sand of getting angry is using burning decrement between 1.0 ~ 1.6
Low precoated sand of getting angry, the high intensity precoated sand use the high-intensitive precoated sand of room temperature bending resistance >=10.
As a further improvement of the present invention, at least exterior end surface of sand core is coated with Quench coating in the pipeline.
The all surfaces of sand core are coated with Quench coating in the pipeline.The outer end of sand core is drilled with gas vent in the pipeline.Institute
It states and is equipped with the blind riser for feeding casting and the dump tank for slag inclusion drainage inside die ontology.
As a further improvement of the present invention, the running channel inner wall of the die ontology is equipped with insulating layer.The insulating layer
By first uniformly smearing refractory fibre paste, then brush thermal insulation coatings are formed.The thermal insulation coatings are applied using FOSECO 34# heat preservation
Material.
The method for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, it is characterised in that: the casting of the metal mold Aerial-casting
It carries out in the steps below:
(1), sand core in pipeline is made using high-intensitive precoated sand, shell sand core is made using low precoated sand of getting angry, then
Sand core dip-coating material is given, dry the surface of sand core paints one layer of Quench coating in pipeline later, and bores upper air-vent；
(2), first die horizontal is placed, is heated to 150 ~ 200 DEG C, prepares to coat after mold to temperature, in die ontology
Running channel, uniformly spread refractory fibre paste on dead head and blind riser after brush FOSECO 34# thermal insulation coatings；
(3), the above process starts to cast after being ready to, after opening mould, sand core and outer in pipeline that step (1) is made
The corresponding position being put into die ontology of shell sand core gently, then molds, and verts after 90 ° with the aluminum water casting that refining is qualified；
Casting is put into baking oven after casting complete, 380 ~ 420 DEG C of 1.5 ~ 2.5h of baking is heated to, then takes out, in pipeline sand core and
Shell sand core just occur it is defeated and dispersed, to obtain required casting.
As the further improvement of the method, the qualified aluminum water of the refining refers to the argon gas refining by 99.9%, hydrogen
The equivalent of element detects the aluminum water less than 0.5%.
Compared with the prior art, the invention has the following advantages: the present invention passes through the various technical methods of integrated use, including
Common precoated sand is substituted using the high-intensitive and low precoated sand got angry, is poured in sand core surface brush Quench coating, reasonable metal mold
The refining treatment of molten aluminum, can be greatly decreased when the anti-melting of road design, the rational deployment and mold of blind riser and slagging channel
Shrinkage porosite and slag inclusion problem in metal mold Aerial-casting production process, make the qualification rate of casting reach 80% or more.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of inventive die product embodiments.
Fig. 2 is the second structural representation of inventive die product embodiments.
Fig. 3 is the structural schematic diagram of sand core in pipeline in inventive die product embodiments.
Fig. 4 is the top view of Fig. 3.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
As shown in Fig. 1 ~ Fig. 4, the mold of solution metal mold Aerial-casting shrinkage porosite, slag inclusion in embodiment is mainly by mold sheet
Sand core 3 forms in body 1, shell sand core 2 and pipeline, and the shell sand core 2 is made of the low precoated sand got angry, in the pipeline
Sand core 3 is made of high-intensitive precoated sand.
In the present invention, the low precoated sand of getting angry preferably uses low get angry overlay film of the burning decrement between 1.0 ~ 1.6
Sand, the high intensity precoated sand preferably use the high-intensitive precoated sand of room temperature bending resistance >=10.
As shown in Figure 3, Figure 4, in the present invention, at least outer end surface 3a of sand core 3 is applied coated with Quench in the pipeline
Material, can solve surface shrinkage porosite problem in this way.In actual use, according to requiring, in the pipeline, all surfaces of sand core 3 are all
Quench coating can be coated with.The outer end 3a of sand core 3 is drilled with gas vent in the pipeline.
In the present invention, the running channel 1a inner wall of the die ontology 1 is equipped with insulating layer, and the insulating layer is by first uniform
Smearing refractory fibre paste, then brush thermal insulation coatings are formed, and the thermal insulation coatings preferably use FOSECO 34# thermal insulation coatings.
As shown in Figure 1 and Figure 2, the present invention in, inside the die ontology 1 be equipped with for feeding casting blind riser 1b and
Dump tank 1c for slag inclusion drainage.
In the present invention, since sand core 3 is high-intensitive precoated sand in pipeline, cooperates Quench coating, high temperature molten aluminum can be subjected to
Impact, form smooth continuous bore passages, disconnected core, overlap be greatly decreased；And the low gas forming amount of shell sand core 2 is greatly reduced
The generation rate of the defects of stomata, slag inclusion.And insulating layer is arranged in running channel 1a, can keep the temperature, keep away to metal mold Aerial-casting
It is too fast and influence quality to exempt from metal mold Aerial-casting temperature change.
Manufacture embodiment 1
The method for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, casting metal type Aerial-casting in the steps below:
(1), sand core 3 in pipeline are made using high-intensitive precoated sand, shell sand core 2 are made using low precoated sand of getting angry, so
Sand core dip-coating material is given afterwards, and dry the surface of sand core 3 paints one layer of Quench coating in pipeline later, and bores upper air-vent；
(2), first die horizontal is placed, is heated to 150 DEG C, prepares to coat after mold to temperature, in pouring for die ontology 1
FOSECO 34# thermal insulation coatings are brushed after uniformly spreading refractory fibre paste on road 1a, dead head and blind riser 1b；
(3), the above process starts to cast after being ready to, after opening mould, 3 He of sand core in pipeline that step (1) is made
The corresponding position being put into die ontology 1 of shell sand core 2 gently, then molds, and verts and is poured after 90 ° with the qualified aluminum water of refining
Note；Casting is put into baking oven after casting complete, 380 DEG C of baking 2.5h is heated to, then takes out, sand core 3 and shell in pipeline
Sand core 2 just occur it is defeated and dispersed, to obtain required casting.
Manufacture embodiment 2
The method for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, casting metal type Aerial-casting in the steps below:
(1), sand core 3 in pipeline are made using high-intensitive precoated sand, shell sand core 2 are made using low precoated sand of getting angry, so
Sand core dip-coating material is given afterwards, and dry the surface of sand core 3 paints one layer of Quench coating in pipeline later, and bores upper air-vent；
(2), first die horizontal is placed, is heated to 175 DEG C, prepares to coat after mold to temperature, in pouring for die ontology 1
FOSECO 34# thermal insulation coatings are brushed after uniformly spreading refractory fibre paste on road 1a, dead head and blind riser 1b；
(3), the above process starts to cast after being ready to, after opening mould, 3 He of sand core in pipeline that step (1) is made
The corresponding position being put into die ontology 1 of shell sand core 2 gently, then molds, and verts and is poured after 90 ° with the qualified aluminum water of refining
Note；Casting is put into baking oven after casting complete, 400 DEG C of baking 2h is heated to, then takes out, sand core 3 and shell sand in pipeline
Core 2 just occur it is defeated and dispersed, to obtain required casting.
Manufacture embodiment 3
The method for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, casting metal type Aerial-casting in the steps below:
(1), sand core 3 in pipeline are made using high-intensitive precoated sand, shell sand core 2 are made using low precoated sand of getting angry, so
Sand core dip-coating material is given afterwards, and dry the surface of sand core 3 paints one layer of Quench coating in pipeline later, and bores upper air-vent；
(2), first die horizontal is placed, is heated to 200 DEG C, prepares to coat after mold to temperature, in pouring for die ontology 1
FOSECO 34# thermal insulation coatings are brushed after uniformly spreading refractory fibre paste on road 1a, dead head and blind riser 1b；
(3), the above process starts to cast after being ready to, after opening mould, 3 He of sand core in pipeline that step (1) is made
The corresponding position being put into die ontology 1 of shell sand core 2 gently, then molds, and verts and is poured after 90 ° with the qualified aluminum water of refining
Note；Casting is put into baking oven after casting complete, 420 DEG C of baking 1.5h is heated to, then takes out, sand core 3 and shell in pipeline
Sand core 2 just occur it is defeated and dispersed, to obtain required casting.
In above-mentioned manufacture embodiment 1 ~ 3, the qualified aluminum water of the refining refers to the argon gas refining by 99.9%, protium
Equivalent detect aluminum water less than 0.5%, can guarantee the degree of purity of raw material in this way, reduce slag inclusion from source.It is tried through actual production
Verifying can reach 80% or so using the comprehensive qualified rate of the metal mold Aerial-casting of technical solution of the present invention production.
Claims (5)
1. solving the mold of metal mold Aerial-casting shrinkage porosite, slag inclusion, including sand in die ontology (1), shell sand core (2) and pipeline
Core (3), it is characterised in that: the shell sand core (2) is made of the low precoated sand got angry, and sand core (3) uses in the pipeline
High-intensitive precoated sand is made；
Low precoated sand of getting angry is using low get angry precoated sand of the burning decrement between 1.0% ~ 1.6%, the high intensity precoated sand
Using the high-intensitive precoated sand of room temperature bending resistance >=10MPa；
At least outer end surface (3a) of sand core (3) is coated with Quench coating in pipeline；
The outer end (3a) of sand core (3) is drilled with gas vent in the pipeline；
The blind riser (1b) for feeding casting and the dump tank (1c) for slag inclusion drainage are equipped with inside die ontology (1)；
Running channel (1a) inner wall of die ontology (1) is equipped with insulating layer.
2. solving the mold of metal mold Aerial-casting shrinkage porosite, slag inclusion as described in claim 1, it is characterised in that: the heat preservation
By first uniformly smearing refractory fibre paste, then brush thermal insulation coatings are formed layer.
3. solving the mold of metal mold Aerial-casting shrinkage porosite, slag inclusion as claimed in claim 2, it is characterised in that: the heat preservation
Coating uses FOSECO 34# thermal insulation coatings.
4. the method for solving metal mold Aerial-casting shrinkage porosite, slag inclusion, the mold that the method uses includes die ontology (1), shell
Sand core (3) in sand core (2) and pipeline, it is characterised in that: the shell sand core (2) is made of the low precoated sand got angry, described
Sand core (3) is made of high-intensitive precoated sand in pipeline；
Low precoated sand of getting angry is using low get angry precoated sand of the burning decrement between 1.0% ~ 1.6%, the high intensity precoated sand
Using the high-intensitive precoated sand of room temperature bending resistance >=10MPa；
At least outer end surface (3a) of sand core (3) is coated with Quench coating in pipeline；
The outer end (3a) of sand core (3) is drilled with gas vent in the pipeline；
The blind riser (1b) for feeding casting and the dump tank (1c) for slag inclusion drainage are equipped with inside die ontology (1)；
Running channel (1a) inner wall of die ontology (1) is equipped with insulating layer；
The casting of the metal mold Aerial-casting carries out in the steps below:
(1), sand core in pipeline (3) are made using high-intensitive precoated sand, shell sand core (2) are made using low precoated sand of getting angry, so
Sand core dip-coating material is given afterwards, and dry the surface of sand core (3) paints one layer of Quench coating in pipeline later, and bores upper air-vent；
(2), first die horizontal is placed, is heated to 150 ~ 200 DEG C, prepares to coat after mold to temperature, in die ontology (1)
FOSECO 34# thermal insulation coatings are brushed after uniformly spreading refractory fibre paste on running channel (1a), dead head and blind riser (1b)；
(3), the above process starts to cast after being ready to, after opening mould, sand core (3) and outside in pipeline that step (1) is made
The corresponding position being put into die ontology (1) of shell sand core (2) gently, then molds, and verts after 90 ° with the aluminum water that refining is qualified
Casting；Casting is put into baking oven after casting complete, 380 ~ 420 DEG C of 1.5 ~ 2.5h of baking is heated to, then takes out, sand in pipeline
Core (3) and shell sand core (2) just occur it is defeated and dispersed, to obtain required casting.
5. solving the method for metal mold Aerial-casting shrinkage porosite, slag inclusion as claimed in claim 4, it is characterised in that: the refining
Qualified aluminum water refers to the argon gas refining by 99.9%, and the equivalent of protium detects the aluminum water less than 0.5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610894763.4A CN106270407B (en) | 2016-10-13 | 2016-10-13 | Solve the mold and method of metal mold Aerial-casting shrinkage porosite, slag inclusion |
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| CN201610894763.4A CN106270407B (en) | 2016-10-13 | 2016-10-13 | Solve the mold and method of metal mold Aerial-casting shrinkage porosite, slag inclusion |
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| CN106270407B true CN106270407B (en) | 2019-07-19 |
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| CN108145097A (en) * | 2018-01-05 | 2018-06-12 | 青岛宏新天机械有限公司 | A kind of casting method for oil drilling engine exhaust |
| CN109400130B (en) * | 2018-12-02 | 2022-07-15 | 湖南嘉顺华新材料有限公司 | Anti-cracking alumina refractory material |
| CN110756733B (en) * | 2019-09-27 | 2021-06-18 | 中国航发南方工业有限公司 | Method for reducing rejection rate of impeller precision casting inclusions |
| CN114309455B (en) * | 2021-12-17 | 2023-04-18 | 山东豪迈机械科技股份有限公司 | Method for eliminating local thermal section of gypsum mold casting |
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| CN1915559A (en) * | 2006-08-31 | 2007-02-21 | 上海天申铜业有限公司 | Metal mold type gravity casting die for cast of tin bronze, and casting method |
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