CN109562310A - The filter method of the filter device and use filter device of filtering liquid metal or its alloy - Google Patents

The filter method of the filter device and use filter device of filtering liquid metal or its alloy Download PDF

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Publication number
CN109562310A
CN109562310A CN201780046951.4A CN201780046951A CN109562310A CN 109562310 A CN109562310 A CN 109562310A CN 201780046951 A CN201780046951 A CN 201780046951A CN 109562310 A CN109562310 A CN 109562310A
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CN
China
Prior art keywords
filter device
fabric
basket
heat resistance
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201780046951.4A
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Chinese (zh)
Inventor
马塞尔·古安
莫里斯·拉卡斯
杰伊·弗里茨克
迈克尔·布查德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Les Produits Industriels de Haute Temperature Pyrotek Inc
Original Assignee
Les Produits Industriels de Haute Temperature Pyrotek Inc
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Filing date
Publication date
Priority claimed from US15/224,028 external-priority patent/US10434569B2/en
Application filed by Les Produits Industriels de Haute Temperature Pyrotek Inc filed Critical Les Produits Industriels de Haute Temperature Pyrotek Inc
Publication of CN109562310A publication Critical patent/CN109562310A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001Retaining slag during pouring molten metal
    • B22D43/004Retaining slag during pouring molten metal by using filtering means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/08Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/086Filter cloth, i.e. woven, knitted or interlaced material of inorganic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/086Filters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00Obtaining aluminium
    • C22B21/06Obtaining aluminium refining
    • C22B21/066Treatment of circulating aluminium, e.g. by filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04Additives and treatments of the filtering material
    • B01D2239/0457Specific fire retardant or heat resistant properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04Additives and treatments of the filtering material
    • B01D2239/0471Surface coating material
    • B01D2239/0492Surface coating material on fibres
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Filtration Of Liquid (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

Filter device, which is provided with, to be allowed filter device to have better robustness and prevents the prototype structure feature for a possibility that being twisted and/or drive under the pressure by the flowing of the liquid metal or liquid metal alloy of filter device.The marginal portion that the feature may include the ridge part for extending filter device periphery, be set in double basket filter devices, or specific " M " shape filter device.

Description

The filtering of the filter device and use filter device of filtering liquid metal or its alloy Method
Technical field
The present invention relates to the Novel filter device for filtering liquid metal (such as aluminium) or liquid metal alloy, the filterings It is carried out in any kind of casting process using filter device, and more specifically, in gravity casting process or in low pressure It is carried out in casting process.
Background technique
Using filter device to prevent some clasts and/or impurity from entering chamber during casting process.These filter devices The pressure that flowing by liquid metal or alloy by passing through filter device applies, these filter devices may include metal mistake Filter (i.e. the net of wire), non-metal filter (being finally arranged the fabric of the heat resistance fiber of protective coating) or ceramic bubbles Foam filter.
Each filter device has and the matched geometrical construction of corresponding holding part that mold cavity inlet is arranged in.
In general, clast and/or impurity are kept by filter device, and it is solidified in mold in liquid metal or alloy Afterwards, in the metal block (i.e. protrusion) that clast and/or impurity are still trapped in, which will pass through ability from moulding article Any proper method separation well known to field technique personnel, and re-melting is to be used for metal recovery.
Sometimes, by the liquid metal of filter device or alloy flow pressure applied can make the filter device deformation with Some clasts and/or impurity are allowed to enter the chamber for being used to form moulding article.Top it all off, it may occur however that the liquid metal Flowing filter device is driven in mold cavity.In both cases, obtained product is all controlled by quality negative, thus It reduces the efficiency of casting process and increases operating cost.
It is generally difficult to effectively recycle metal or metal alloy from described piece.In fact, the mistake made of wire cloth Filter device is gathered in the bottom (it is made to be difficult to recycle) of liquid metal or metal alloy, and they can partly be dissolved into again The chemical property or group of the metal or metal alloy of the re-melting are polluted and/or changed in molten metal or metal alloy At.Moreover, ceramic foam filter can be decomposed partly and pollute liquid metal or alloy, and/or it is gathered in liquid metal Or the bottom (them is made to be difficult to recycle) of alloy.Alternatively, filter device made of the existing rigidifying fabric heat resistance fiber gathers Collection is at the top (being easily recycled them) of liquid metal or liquid metal alloy.The simple and/or quick recycling of filter device With economic interests.
The existing filter made of the rigidifying fabric heat resistance fiber
Filter device (the i.e. fabric filtration that the rigidifying fabric made of heat resistance fiber or the silk made of heat resistance fiber forms Device) there are economic interests.In fact, since metal block (such as aluminium block) is to be cast in mold by metal product and generated, Described piece has been filtered comprising fabric filter and has poured into the liquid metal in mold.When the block be recovered and then re-melting with When for recycling purpose, furnace bottom is gathered in the filter made of steel wire on the contrary, made of rigidifying heat resistance fiber Filter is swum on the top of liquid metal or metal alloy, them is made to be easy to fetch.
Having carried out some trials allows liquid metal filtering liquid metal before pouring into mold to embody fabric filter (such as liquid aluminum or aluminum alloy).Fabric made of silk or heat resistance fiber made of heat resistance fiber is known.They have Fiber (such as glass fibre) coated with sizing material (such as starch).The existing fabric can be made of non-woven fiber (form the felt of heat resistance fiber), or be made of the silk of heat resistance fiber.According to well known to a person skilled in the art knitting skills to incite somebody to action The silk is woven together.According to the prior art, this fabric can by the fabric apply rigidifying material and rigidifying, with Keep it hard enough with will not be because the pressure of the liquid metal (especially liquid aluminium) by its aperture deforms.However, resistance to On the sizing material of thermal fiber apply rigidifying material show have the shortcomings that it is serious, this will hinder those skilled in the art use The filter prepared in this way.
The presence of rigidifying material (i.e. coating) shows several disadvantages, these disadvantages can interfere those skilled in the art to consider Come filtering liquid metal, such as liquid aluminum or aluminum alloy using this filter.In fact, the coating on the fiber of gained fabric Show the shortcomings that blocking and/or partial blockage aperture are generated between silk (mesh size for reducing fabric filter).And And because protectiveness/rigidifying coating is usually brittle, particle may fall off to pollute liquid aluminium, especially from coating It is when applying on the sizing material of fiber.Therefore, up to the present, by by rigidifying heat resistance fiber (such as glass fibre Or silicon oxide fibre) filter device made of fabric fails to replace the trial of this filter device.
In fact, it is different from the filter device made of wire cloth, by the silk or rigidifying heat resistance fiber of heat resistance fiber Fabric made of existing filter device it is not hard enough to prevent the change as caused by the pressure for the liquid for flowing through the filter device Shape, and therefore their cisco unity malfunctions (filtering of liquid metal or liquid metal alloy is effectively performed).In addition, i.e. The existing filter device made of rigidifying heat-resistant fabric is set to can be configured with increased filtering surface, they also show The shortcomings that providing the mesh for being likely to be used for the material part blocking of fabric rigidifying is (to reduce effective filtering of filter device Surface).Finally, in some cases, or even the filter device made of wire may also become because of the flowing of liquid metal Shape or allow and finally in the intracavitary driving of mold.
Therefore, a kind of fabric filter is needed strongly in the industry, fabric filter permission is poured by liquid metal The liquid metal, such as liquid aluminium or liquid aluminium alloy are filtered when in mold, and not relevant to existing filter scarce Point.
About ceramic foam
When using ceramic foam during casting process, moulding article is removed from the molds, and ceramic foam mistake Filter is still trapped in the block of moulding article.Then by any proper method well known to those skilled in the art by described piece It is taken out from final product, and re-melting is to carry out metal recovery.However, as described above, being generally difficult to from described piece effectively Recycle metal or metal alloy.In fact, ceramic foam filter contained by block can be decomposed partly and pollute liquid metal Or metal alloy, and/or it is gathered in the bottom (them is made to be difficult to recycle) of liquid metal or metal alloy.
In addition, ceramic foam filter shows the shortcomings that temperature to liquid metal or metal alloy has an impact (i.e. Ceramic foam filter has thermal mass), and finally influence chemical property (the i.e. institute of the metal or metal alloy of filling mold cavity Obtain the chemical property of moulding article).Further, since ceramic foam filter is monolithic mass, therefore, it is difficult to increase its effective mistake Filter surface.
Therefore, there is an urgent need to a kind of new filter device, which allows in this filter device of use will make Product, which are cast in the method in mold, replaces existing ceramic foam filter.It requires, in fact, avoiding and/or minimizing and pottery Porcelain foam filter haves the shortcomings that correlation.More specifically, the filter device for needing that there is low thermal mass strongly, so as to minimum Change and/or avoids having an impact the temperature of liquid metal, allows to increase filtering surface and/or allow preparation filtering faster Device.
Moreover, applicant further found that overcome with made of the fabric of heat resistance fiber silk and/or rigidifying heat resistance fiber The various embodiments of the disadvantage of the existing filter device correlation.More specifically, it is noted that in many merits In, filter device according to the present invention prevents the flowing of the liquid by filter device from deforming, preventing the part of mesh Block, prevent the pollution of the liquid metal or liquid metal alloy (such as liquid aluminum or aluminum alloy) of filtering, and/or optionally permits Perhaps easily operated by being provided with the tool (being especially provided with the robots arm of the tool) of magnet, at the same with it is corresponding Existing filter (such as filter made of wire) is equally effective.
In addition, applicant have surprisingly discovered that, when use has specific structure made of fabric or rigidifying heat resistance fiber When the filter device of shape and orientation, it can overcome and dress is made or filtered made of heat-resistant fabric of wire cloth Set related disadvantage.
In addition, applicant have surprisingly discovered that, by (such as being selected with the rigidifying filter by wire cloth or heat resistance fiber The heat resistance fiber of the group of free glass fibre or silicon oxide fibre composition) made of relatively inexpensive filter device replace ceramic foam Filter can overcome the disadvantage related to ceramic foam filter.
About the filter device made of wire cloth (such as stainless steel wire), when contact liquid metal to be filtered or When metal alloy, the wire may be partly dissolved, to pollute liquid metal or metal alloy.For example, when wire by Stainless steel is made, and when liquid metal alloy to be filtered is aluminium alloy, then the aluminium alloy may polluted by iron.Therefore, The chemical property of liquid metal or alloy that the use of the filter device made of wire is filtered by significant negative effect The limitation of possibility.
Filter device is placed using magnetic in the aperture of mold cavity by Foundry Works that is some but being not all of.This can be by The Magnetic tools that operator uses are executed with manual placement, or are attached to the Magnetic tools of robot and are come with automatic placement It executes.In addition, some but not every Foundry Works confirms that filter device is properly positioned mold cavity using X-ray examination Aperture in.It should be noted that the processing of filter or filter device is likely difficult to be integrated to automation process and robotization process In.In fact, usually using catching the tool of filter that manually filter is placed on the entrance of mold cavity.
Therefore, it is required to easily handle and be located in the filter device in the aperture of mold cavity strongly in the industry, Especially with automatic machinery peopleization equipment, and allows to be confirmed with X-ray equipment and be properly positioned.
Furthermore, it is also very desirable to which a kind of new filter device made of rigidifying heat-resistant fabric or heat resistance fiber silk is permitted Perhaps it is easy and/or rapidly recycles filter device from the liquid metal that the block of the metal obtained by moulding article generates, thus The economic advantages better than existing filter have been determined.
Furthermore, it is also very desirable to which one kind is made of rigidifying heat-resistant fabric or newly filtering fills made of heat resistance fiber silk It sets, wherein avoiding and/or minimizing disadvantages mentioned above.
Furthermore, it is also very desirable to which a kind of new filter device prevents from reducing its filter table by reducing the size in aperture Face, and optionally allow to increase the filtering surface by changing its shape and/or allow quickly to prepare filter device.
Furthermore, it is also very desirable to a method of for manufacturing new filter device defined above, and the mistake so obtained Filter device.
Furthermore, it is also very desirable to using the casting method of filter device as defined above, more specifically, gravitational casting side Method or low-pressure casting method, and it is highly preferred that automation low-pressure casting method, filter device is by such as in above-mentioned manufacturing method The upper rigidifying heat-resistant fabric is made.
In addition, needed strongly in metallurgical industry using filter device any kind of casting method (more specifically, Gravity casting method or low-pressure die casting plant) in be made of the fabric of heat resistance fiber defined above or the silk of the heat resistance fiber Filter device, without the disadvantage related to existing filter device.
In addition, the filter device being highly desirable to improve, which will be prevented by passing through filtering during casting process The liquid metal of device or the flowing pressure applied of alloy and deform and/or drive.
Applicant has had now surprisingly been found that the various embodiments of filter device, with improved structural property to prevent Only occur below
A) it is deformed by the flowing pressure applied of liquid metal or liquid metal alloy, allows clast and/or impurity Enter together with the liquid metal or alloy it is intracavitary, or
B) it is driven, is allowed not only in mold cavity by the flowing pressure applied of liquid metal or liquid metal alloy Have filter device there are also clast and/or impurity enter together with the liquid metal or liquid metal alloy it is intracavitary.
In addition, applicant have surprisingly discovered that, improved structure feature allows to meet above-mentioned needs.
Summary of the invention
According to the present invention, filter device is provided with the prototype structure feature for allowing filter device to have better flintiness, With further prevent being twisted and/or drive under the flowing pressure of liquid metal or liquid metal alloy by filter device Possibility.
According to the first preferred aspect, the present invention relates to a kind of filtering dresses for filtering liquid metal or liquid metal alloy It sets, wherein the filter device has lower surface, upper surface, neighboring, major part and the peripheral part around major part Point, outer peripheral portion is configured to form cavity in upper surface and forms flange in lower surface;And wherein ridge part extends peripheral part Point.
Applicant have surprisingly discovered that being provided with by increasing in expander or the filter device for the major part for distributing pin contacts Add ridge part, the ridge part horizontally or angularly extends along the seat being arranged in oral cavity is poured, shows imaginary Less than benefit.In fact, it is found by the applicant that:
Ridge part especially suitable for:
ο provides simple and consistent placement/position of filter device in pouring oral cavity, and median ridge " makes filter device by oneself The heart " is in pouring oral cavity and ensures that it is horizontally arranged in the whole circumference of filter device.
ο increases the intensity of entire filtering device designs, allows from expander top (or distribution pin) mild compression with by mistake The position or shape that filter device is held in place without distorting filter device.
Filter device upwardly extends, and contacts with expander top (or distribution pin):
ο makes filter device during casting in delicate but continuous tension from the mild compression on expander top Under, facilitate filter device and entirely keeps its shape and integrality during casting.
According to another embodiment, the present invention relates to above-mentioned first preferred aspects, wherein the filter device is by heat-resisting The rigidifying fabric of fiber is made or is made of heat resistance fiber silk, is impregnated with the composition of the mixture comprising product A and product B:
Product A is obtained by the polymerization of saccharide unit;And
Product B is made of at least one inorganic colloid bonding agent, and the composition is in thermoset stage.Preferably, institute Stating heat resistance fiber is or mixtures thereof glass fibre, silicon oxide fibre.
According to another embodiment, the present invention relates to above-mentioned first preferred aspects, and wherein major part is vertex direction The dome of upper surface orientation.
According to another embodiment, it the present invention relates to above-mentioned first preferred aspect, is also provided with by magnetisable material system At insertion piece, for using the tool control filter device for being provided with magnet.
According to another embodiment, the present invention relates to above-mentioned first preferred aspect, wherein heat resistance fiber is glass fibers Or mixtures thereof dimension, silicon oxide fibre, and wherein product A passes through the caramelization acquisition of mixture M, and mixture M includes sugarcane Sugar, water and optionally at least a kind of additive, the additive select free acid, inorganic wetting agent and acid phosphate adhesive composition Group.
According to another embodiment, the present invention relates to above-mentioned first preferred aspects, and wherein major part has vertex court The frusto-conical being orientated to upper surface.
According to another embodiment, the present invention relates to above-mentioned first preferred aspects, are also provided with and are made of magnetisable material Insertion piece, for using being provided with the tool control filter device of magnet.
According to another embodiment, the present invention relates to above-mentioned first preferred aspect, wherein heat resistance fiber is glass fibers Or mixtures thereof dimension, silicon oxide fibre, and wherein product A is by obtaining to mixture M caramelization, and mixture M includes Sucrose, water and optionally at least a kind of additive, the additive select free acid, inorganic wetting agent and acid phosphate adhesive group At group.
According to the second preferred aspect, the present invention relates to a kind of filtering dresses for filtering liquid metal or liquid metal alloy It sets, the filter device is the type of the basket with interconnection, and the basket, which is provided with, allows basket to have better flintiness (rigidity) Prototype structure feature, to further prevent being twisted under the pressure that liquid metal or liquid metal alloy flow through basket A possibility that.More specifically, the filter device is made of the first basket and the second basket,
The wherein chamber that the first basket has outer wall and limited by inner wall, end wall and the aperture opposite with end wall,
The wherein chamber that the second basket has outer wall and limited by inner wall, end wall and the aperture opposite with end wall,
Wherein the open end of the first basket is placed in the chamber of the second basket, with limit have planform and orientation and including Chamber, upper surface, lower surface and the filtering body of side surface,
Wherein the end wall of the first basket corresponds to upper surface, and the end wall of the second basket corresponds to lower surface,
Wherein, when the outer wall of the first basket is sized to cooperate against the inner wall of the second basket, the outer wall of the second basket is at least The side surface of filtering body is practically corresponded to, or when the outer wall of the second basket is sized to cooperate the inner wall against the first basket When, the outer wall of the first basket corresponds at least partially to the side surface of filtering body;And
Wherein, the outer wall of the first basket has the lateral part and top section connected by the outer peripheral portion at formation edge;And And second basket outer wall have by formation edge outer peripheral portion connect lateral part and bottom part.
According to another embodiment, the present invention relates to above-mentioned second preferred aspects, wherein the end wall of the first basket corresponds to The lower surface of filter device, and the end wall of the second basket corresponds to the upper surface of filter device.
According to another embodiment, the present invention relates to above-mentioned second preferred aspects, wherein the filter device also wraps It includes in intracavitary filter pad.
According to another embodiment, the present invention relates to above-mentioned second preferred aspects, wherein the filter device is by heat-resisting The rigidifying fabric of fiber is made or is made of the silk of heat resistance fiber, is impregnated with the combination of the mixture comprising product A and product B Object:
Product A is obtained by the polymerization of saccharide unit;And
Product B is made of at least one inorganic colloid bonding agent, and the composition is in thermoset stage.
According to another embodiment, the present invention relates to above-mentioned second preferred aspects, are also provided with and are made of magnetisable material Insertion piece, for using being provided with the tool control filter device of magnet.
According to another embodiment, the present invention relates to above-mentioned second preferred aspect, wherein heat resistance fiber is glass fibers Or mixtures thereof dimension, silicon oxide fibre, and wherein product A is obtained by caramelization mixture M, and mixture M includes sucrose, water With optionally at least one additives, which selects the group of free acid, inorganic wetting agent and acid phosphate adhesive composition.
The invention further relates to third preferred aspect of the invention, the third embodiment has " M " shape of innovation.It is this Special " M " shape filter device can be made of any suitable material, the fabric including traditional wire, for that will make Product filter liquid metal or liquid metal alloy during being cast in mold.It is preferable, however, that by the rigidifying fabric of heat resistance fiber The filter device with this " M " shape is made.
More specifically, according to another embodiment, the present invention relates to above-mentioned third preferred aspects, wherein the filtering fills Setting is the fabric of wire or the fabric of rigidifying fiber, and the filter device has a shape such that the shape waits being accommodated in and sets It is equipped in the holding part of the casting mould of at least one filling access, wherein holding part (shell) is parallelepiped-shaped, and Wherein fabric limits " M " shape filter, and " M " the shape filter has arcuate part and pairs of parallel branch, this is pairs of Pairs of opposed end of the parallel branch respectively with the holding part of parallelepiped-shaped is substantially coplanar, and the arcuate part has The top for being orientated towards chamber or being oppositely oriented with chamber.
According to another embodiment, the present invention relates to above-mentioned third preferred aspects, and wherein the top of arcuate part is orientated At opposite with chamber.
According to another embodiment, the present invention relates to above-mentioned third preferred aspect, wherein fabric is by being woven together Stainless steel wire be made.
According to another embodiment, the present invention relates to above-mentioned third preferred aspect, wherein filter device is by being woven in one The rigidifying fabric of the heat resistance fiber risen is made.In view of the form of filter device, those skilled in the art are heat-resisting using rigidifying Fiber is unexpected.
Applicant have surprisingly discovered that " M " shape filter device shows following unexpected benefit:
ο on toppling over number compared with having relatively high variability using traditional ceramics foam filter, due to material Braiding and improve casting and topple over the consistency of number
Rigidity of the ο filter device made of the heat resistance fiber or silk of rigidifying in entire casting cycle is (for example, material exists Keep its shape up to 30 seconds in 700 DEG C of mold before even seeing molten metal (such as molten aluminum)).
ο arch, which is distributed and filtered for metal flow, provides additional surface area (surface region).
According to another embodiment, the present invention relates to above-mentioned third preferred aspects, wherein including product A by heat cure The rigidifying fabric of heat resistance fiber is obtained with the composition of the mixture of product B;
Product A is obtained by the polymerization of saccharide unit;And
Product B is made of at least one inorganic colloid bonding agent,
Be immersed in the fabric of heat resistance fiber, the fabric substantially free of one or more sizing agents, the sizing agent by Organic polymer composition.
According to another embodiment, the present invention relates to above-mentioned third preferred aspect, wherein heat resistance fiber be glass fibre, Or mixtures thereof silicon oxide fibre, and wherein product A is by obtaining to mixture M caramelization, and mixture M includes sugarcane Sugar, water and optionally at least a kind of additive, the additive select free acid, inorganic wetting agent and acid phosphate adhesive composition Group.
Detailed description of the invention
According to technology well known in the art, above-mentioned filter device can be made of any material appropriate, such as wire Net.However, it is preferred that filter device is made of the fabric of heat resistance fiber, and more specifically, by International Application Serial No. PCT/ The fabric of rigidifying heat proof material defined in CA2015/050047 is made.
The rigidifying fabric made of the silk of heat resistance fiber or heat resistance fiber is used to prepare (preferably to compile made of heat resistance fiber Knit rigidifying fabric made of silk) composition include product A and product B mixture:
Product A is obtained by the polymerization of natural or synthesis carbohydrate unit, preferably carbohydrate, and more preferably Sugar glucose, fructose, galactolipin, sucrose, maltose, lactose etc.;And
Product B is made of at least one additive such as bonding agent.
More particularly, the composition includes the mixture of product A and product B;
Product A is obtained by the caramelization of mixture M, and mixture M includes:
Sucrose,
Water, and
Optional at least one additive;And
Product B is made of at least one inorganic colloid bonding agent.
It is a kind of prepare for manufacture heat resistance fiber be made or the silk made of heat resistance fiber made of rigidifying fabric group The method for closing object, the composition include the mixture of product A and product B:
Product A is obtained by the polymerization of natural or synthetic carbohydrate unit, preferably carbohydrate, and is more preferably eaten Sugared glucose, fructose, galactolipin, sucrose, maltose, lactose etc.;And
Product B is made of at least one additive such as bonding agent;
It the described method comprises the following steps:
Carbohydrate unit is polymerize to obtain the carbohydrate of polymerization, and
Product A is mixed with product B.
According to another preferred embodiment, rigidifying fabric is made of or mixtures thereof glass fibre, silicon oxide fibre Braided wires be made.
According to another preferred embodiment, it is used to prepare the rigidifying fabric made of heat resistance fiber or by heat resistance fiber Silk made of rigidifying fabric composition include product A and product B mixture, the heat resistance fiber is glass fibre, oxygen Or mixtures thereof SiClx fiber;Product A is obtained by caramelization mixture M, and mixture M includes: sucrose, water and optionally at least A kind of additive, the additive select the group of free acid, inorganic wetting agent and acid phosphate adhesive composition;And product B by At least one inorganic colloid bonding agent composition.It is highly preferred that rigidifying fabric is by or mixtures thereof glass fibre, silicon oxide fibre Braided wires are made.
According to another preferred embodiment, sucrose can be any kind of sugarcane for being commonly used to manufacture " caramel " Sugar.Preferably, sucrose is food-grade, purification and granulated sucrose (such as table sugar).
According to another preferred embodiment, water can be wrapped by allowing any kind of water for manufacturing " caramel " to form Include tap water, distilled water, softened water etc..Preferably, water is tap water.
According to another preferred embodiment, acid can be phosphoric acid, sulfuric acid, citric acid, acetic acid or they at least Two kinds of mixture.Preferably, acid can be phosphoric acid.
According to another preferred embodiment, inorganic wetting agent can be alum, magnesium sulfate, aluminum sulfate, sulfuric acid Calcium or at least two mixture in them.It is highly preferred that inorganic wetting agent can be alum.
According to another preferred embodiment, acid phosphate adhesive can be calcium phosphate, magnesium phosphate, aluminum sulfate or At least two mixture in them.It is highly preferred that superphosphate adhesive can be calcium phosphate.
According to another preferred embodiment, at least one inorganic colloid bonding agent can by colloidal silica, Colloidal alumina, colloidal zirconia or at least two mixture composition in them.Preferably, at least one inorganic glue Body bonding agent is colloidal silica.It is highly preferred that at least one inorganic colloid bonding agent can be by colloidal silicon dioxide group At with the colloid dioxy of the aqueous colloidal dispersion of the submicron order silicon oxide particle of microspheres form such as in alkaline aqueous solution SiClx.It is highly preferred that inorganic colloid bonding agent is the submicron order silicon oxide particle in alkaline aqueous solution with microspheres form Aqueous colloidal dispersion, and with trade markIt sells.It is describedIt has characteristics that
According to another preferred embodiment, mixture M includes:
The sucrose of 30wt.% to 70wt.%, the preferably from about sucrose of 55.0wt.%;
The water of 70wt.% to 30wt.%, the preferably from about water of 41.5wt.%;
The phosphoric acid of 0wt.% to 1.8wt.%, the preferably from about phosphoric acid of 1.1wt.%;
The alum of 0wt.% to 1.7wt.%, the preferably from about alum of 1.0wt.%;With
The calcium dihydrogen phosphate of 0wt.% to 2.0wt.%, the preferably from about calcium dihydrogen phosphate of 1.4wt.%.
According to another preferred embodiment, phosphoric acid is derived from the H of 75wt.% in composition defined above3PO4 With the mixture of 25wt.% water, the amount of water is a part of the total Water of composition, and alum is AlNH4(SO4)2·2H2O It is Ca (H with calcium dihydrogen phosphate2PO4)2·2H2O。
According to another preferred embodiment, the composition include 50wt.% to 85wt.% product A and The product B of 15wt.% to 50wt.%.Preferably, the composition can include about the product A of 66wt.% and about 34wt.% Product B.
According to another preferred embodiment, by boiling temperature, preferably between 100 DEG C and 105 DEG C, more preferably Mixture M is heated between 100 DEG C and 103 DEG C and carries out caramelization for a period of time, this time is between 5 minutes to 10 minutes Variation, more preferably from about 5 minutes, and then make products therefrom A cooling.
According to another preferred embodiment, at least one inorganic colloid bonding agent is added to product A by mixing In.
According to another preferred embodiment, rigidifying fabric is made of the silk of heat resistance fiber, and heat resistance fiber, which is selected from, includes The group of sour, inorganic wetting agent and superphosphate adhesive composition, the diameter of the silk become in 0.864mm between 0.533mm Change, and the mesh of fabric changes in 0.94mm between 0.255mm, and aperture relative to fabric total surface from 50.9% To 35.9%.
According to another preferred embodiment, heat resistance fiber (heat resistance fiber of the silk including heat resistance fiber) is by E- glass Glass, S- glass or high silica glass are made.More preferably, it should be noted that the silk of glass fibre or glass fibre can be originated from skilled worker The fabric of the known and easy glass fibre obtained on the market, the fabric are present on fiber by processing with removing The polymer size (such as starch) of (especially protecting fiber in processing/operating process).
According to another embodiment, a kind of to prepare rigidifying fabric or the silk system by heat resistance fiber made of heat resistance fiber At rigidifying fabric method, the described method comprises the following steps:
A) silk made of composition as defined above dipping fabric or heat resistance fiber made of heat resistance fiber, institute The heat resistance fiber of heat resistance fiber or silk is stated substantially free of one or more sizing agents being made of organic polymer, to be soaked Stain has the fabric of the composition;
B) by the fabric impregnated with composition (as obtained from step a)) about 101 DEG C to 160 DEG C at a temperature of carry out The composition being immersed in the fabric, is placed in the hot plastic state of softening by heat treatment, and optionally allows such obtain The fabric arrived is cooling;
C) fabric forming for optionally obtaining step b) is required shape, and optionally makes the fabric obtained in this way cold But;With
D) by the fabric for being impregnated with the composition (as obtained from step b) or c)) by be heated to thermosetting property temperature into Row heat cure processing, so that dipping thermoplastic compounds heat cure in the fabric, so that by being crosslinked heat resistance fiber or silk Heat resistance fiber makes fabric rigidifying.
According to another embodiment, a kind of to prepare the thermoplasticity made of heat resistance fiber, rigidifying fabric or by heat-resisting fibre The method of thermoplasticity made of the silk of dimension, rigidifying fabric, the described method comprises the following steps:
A) made of the silk with composition as defined above dipping fabric or heat resistance fiber made of heat resistance fiber The heat resistance fiber of fabric, the heat resistance fiber or silk substantially free of one or more sizing agents being made of organic polymer, To obtain the fabric for being impregnated with the composition;
B) by the fabric impregnated with composition (as obtained from step a)) about 101 DEG C to 160 DEG C at a temperature of carry out The composition for impregnating the fabric, is placed in the hot plastic state of softening by heat treatment, and optionally allow to obtain in this way Fabric is cooling;And
It c) by the fabric forming obtained from step b) is optionally fabric of the required shape to form certain shapes, and it is optional Ground keeps the fabric of certain shapes cooling;
The thermoplastic fabric by step b) or c) obtained can thermosetting when carrying out heat cure processing under heat curing temperature It is melted into rigid fabric, with the thermoplastic compounds of heat cure dipping in the fabric, so that by being crosslinked heat resistant fibre or silk Heat resistance fiber makes fabric rigidifying.
According to another embodiment, another preparation rigidifying fabric or the silk by heat resistance fiber made of heat resistance fiber The method of manufactured rigidifying fabric, the described method comprises the following steps: by the way that thermoplastic fabric as defined above is heated to heat Solidity temperature carries out heat cure processing, thus the thermoplastic compounds of heat cure dipping in the fabric, so that passing through heat resistance fiber Or the crosslinking of the heat resistance fiber of silk makes fabric rigidifying.
According to another embodiment, can be used as the fabric of the glass fibre of starting material the aspect that must be referred to be by Fabric made of the silk of glass fibre coated with starch.More specifically, the fabric those of can be listed from following table Middle selection:
According to another embodiment, product 40L mentioned above is particularly preferable as starting material.
By reading following non-limiting detailed description, it is better understood with the present invention and its advantage.
Detailed description of the invention
It is better understood with the present invention with reference to the following drawings:
Fig. 1: the partial view of the net of the fabric of the silk of glass fibre according to prior art, the silk are provided with sizing material Material;
Fig. 2: after removing sizing material (i.e. no sizing material), the part view of the net of the fabric of the silk of glass fibre Figure;
Fig. 3: the schematic diagram of the double roller infuser of the fabric of Fig. 2 is impregnated with liquid composition;
Fig. 4: the perspective view of filter device according to the present invention;
The top view of Fig. 5: Fig. 4 filter device;
The cross-sectional view according to line V-V of Fig. 6: Fig. 5 filter device;
Fig. 7: it is located in low-pressure die casting plant, at the seating portion in the upper end of riser and the filling access positioned at mold Diffuser between fig. 4 to fig. 6 filter device partial schematic diagram (according to the present invention);
Fig. 8: the schematic diagram of the low-pressure die casting plant with Fig. 4 to filter device shown in fig. 7.
Fig. 9: the view of the thermoplastic fabric obtained from Fig. 3;
Figure 10: the partial cross-section perspective view of the silk of the fabric of Fig. 9 when being impregnated with composition;
Figure 11: the local perspective view of the first basket according to the present invention;
Figure 12: the local perspective view of the second basket according to the present invention;
Figure 13: the office including the filtering body to the first basket and the second basket that limit new filter device according to the present invention Portion's perspective view;
Figure 14: the local perspective view of filter device, in the filter device filtering body include the first basket and the second basket with And it is accommodated in the intracavitary filter pad of filtering body;
Figure 15: it is located in low-pressure die casting plant, positioned at the seating portion of the upper end of riser and being packed into positioned at mold The partial schematic diagram (according to the present invention) of the filter device of Figure 13 between diffuser at mouthful;
Figure 16: the schematic diagram of the low-pressure die casting plant with filter device shown in Figure 13.
Figure 17: the perspective schematic view of two-part moudle;
Figure 18: the perspective schematic view of a part of two-part moudle;
Figure 19: the perspective view of ceramic foam filter according to prior art;
The cross-sectional perspective view according to XIIIV-XIIIV of Figure 20: Figure 18 mould part, wherein ceramic foam filter is fixed Position is in holding part (prior art);
Figure 21: the rigidifying fabric filter with " M " shape;With
Figure 22: the perspective schematic view of a part of the two-part moudle of " M " shape filter with Figure 21 is (according to this Invention).
Specific embodiment
Example 1
Composition is prepared according to such as getting off:
In the first step, mixture M is prepared by being blended together following ingredients in rustless steel container.More specifically Ground, the ingredients of a mixture include:
The food-grade edible sucrose (i.e. table sugar) sold by Lantic Inc. with trade name Lantic is (under this example Referred to herein as sucrose).
It can be from the tap water of applicant obtained positioned at the laboratory facility in Quebec, Canada Sherbrooke city.
The 75%wt. phosphoric acid of laboratory level, (the i.e. H of 75wt.%3PO4With the mixture of the water of 25wt.%).
The calcium dihydrogen phosphate that-Spectrum Chemical Mfg company sells, including Ca (H2SO4)·H2O。
Alum-is by the ACP Chemical Inc. laboratory level sold, including AlNH4(SO4)2·2H2O。
1kg mixture M, contains
The sucrose of 55.0wt.%;
The tap water of 41.5wt.%;
The 75%wt. phosphoric acid of 1.1wt.%;
The alum of 1.0wt.%;With
The calcium dihydrogen phosphate of 1.4 grams (1.4wt.%).
Preparing the mixture is by the way that 550 grams of sucrose, 41.5 grams of tap water, 1.1 grams are added into rustless steel container 75% phosphoric acid, 1.0 grams of alums and 1.4 grams of calcium dihydrogen phosphates, and then mix them with paint shaker, Until obtaining uniform mixture M.
Then, the temperature that gained homogeneous mixture is heated to 100 DEG C to 103 DEG C is reached at least 5 minutes, to form limit The caramel of the fixed product A.Cool down the product A at room temperature.
In second step, 515 grams of product B is the submicron order silicon oxide particle in alkaline aqueous solution with microspheres form Aqueous colloidal dispersion, and with trade mark NALCO 1144 sale, it is describedIt has the property that
Product B is added to 1.0 kilograms obtained in previous step of product A, ingredient A and B are then used into the oil Paint blender mixes.Mixing is carried out at room temperature until obtaining uniform composition (i.e. about 10 minutes).The combination Object includes the product B of the product A and about 34wt.% of about 66wt.%.
Example 2
Prepare the fabric 107 (referring to fig. 2) of the glass fibre substantially free of the sizing material being made of starch.
More specifically, the glass fibre being made of the E- glass fiber 108 for being coated with stratum granulosum 110 (as sizing agent) is knitted Object 104 (referring to Fig. 1) is heat-treated about 2 minutes in 450 DEG C of baking oven, to burn up the starch (feelings existing for oxygen Under condition), to remove sizing agent.Fig. 1 shows the fabrics 104 with the silk 108 coated with stratum granulosum 110, and Fig. 2 indicates tool There is the fabric 107 of silk 108.Fabric 104 and 107 is provided with aperture 112.More specifically, fabric 104 is as defined above 40L type.
Example 3
The thermoplastic fabric of the rigidifying of glass fibre is prepared according to a kind of method, in the method defined in example 1 The fabric for the glass fibre that composition dipping is such as obtained from example 2, to obtain the fabric for being impregnated with the composition.
More specifically, fabric passes sequentially through the reservoir for accommodating the composition, and then pass through double roller infuser Between pairs of opposite rubber rollers, as shown schematically in attached drawing 3.The double roller infuser is public for skilled worker Know, and does not need to explain in detail.
More specifically, according to the present embodiment, it should be noted that composition 101 is received on pairs of rubber rollers 105 Reservoir 103 in.Fabric 107 then passes through between pairs of opposite rubber rollers 105 continuously across composition 101, this A little rubber rollers are pressed on another one to one, will be in the aperture of a certain amount of composition push-in fabric 107.Then, from While opening rubber rollers 103, stop the pressure to fabric 107, is pushed in the aperture 102 (see Figure 10) of the silk 108 of fabric A certain amount of composition 101 is retained in the aperture of fabric 107 (such as aspirating by capillary), to make fabric The substantially used up excessive composition in surface, and the composition for the additional amount being not remain in fabric is adhered in rubber rollers And it returns in reservoir 103.
Then by the fabric through impregnating so obtained in continuous baking oven about 160 DEG C at a temperature of heat About 2 minutes, so that the composition of dipping in the fabric is placed in the hot plastic state of softening.
Then, the thermosetting property fabric (that is, being impregnated with the composition for being converted into hot plastic state) so obtained prepares to be used for It is further processed, thermoplastic fabric is such as optionally shaped to required size and/or shape, then heat cure processing makes group Object heat cure is closed, and provides rigidifying fabric by being crosslinked for thermally resistant fiber glass.If do not used immediately, it can permit fabric and exist It cools down at room temperature.
Example 4
The fabric that the composition obtained with embodiment 3 impregnates is cut into 7 inches × 48 inches of piece, then at 450 DEG C Baking oven in carry out heat cure handle 2 minutes, with will pass through crosslinking glass fibre make fabric rigidifying.
Then, the rigidifying fabric so obtained can be used as the filtering for liquid metal (such as liquid aluminum or aluminum alloy) Device.This rigidifying fabric derives from the 40L type fabric of glass fibre as defined above, which has 0.0255cm2's Aperture.When the filtering for liquid aluminium, which shows effective and immaculate as the filter of the prior art.
Example 5
The thermoplastic fabric obtained by example 3 is cooled down at room temperature, is cut into 3 inches × 3 inches of piece, be then placed in by In the mold heat of pairs of opposite half mold composition, to soften and be molded as the piece of the fabric by compression moulding required Shape.Then, make forming fabric cooling.
Then, the forming fabric so obtained is prepared for further processing, such as heat cure is handled, so that composition Heat cure, and rigidifying fabric is provided by being crosslinked for thermally resistant fiber glass.
Example 6
The forming fabric obtained by example 5 is carried out to heat cure to handle 2 minutes in 450 DEG C of baking oven, to pass through silk The crosslinking of glass fibre makes fabric rigidifying.
Then, the rigidifying fabric of the forming so obtained can be used as liquid metal (such as liquid aluminum or aluminum alloy) Filter is especially used in low pressure casting process.The rigidifying fabric of this forming is from glass fibre as defined above 40L type fabric, the fabric have 0.0255cm2Aperture.When the filtering for liquid aluminium, which shows and by gold It is equally effective and immaculate to belong to those of the prior art made of silk filter.
Example 7
The fabric that example 3 obtains is cut into 3 inches × 3 inches of piece, and in the hot plastic state for being still within softening, The fabric is put into the cold mold being made of pairs of opposite half mold, to obtain knitting for required shape by compression moulding Object.
Then, the forming fabric so obtained is carried out to heat cure to handle 2 minutes in 450 DEG C of baking oven, to pass through glass The crosslinking of glass fiber makes fabric rigidifying.
Thereafter, the forming rigidifying fabric so obtained can be used as liquid metal (such as liquid aluminum or aluminum alloy) Filter is especially used in low pressure casting process.When the filtering for liquid aluminium, which shows and by wire Those of manufactured prior art filter is equally effective and immaculate.
Certainly, alternatively, if the fabric obtained from example 3 cools down at room temperature, any method appropriate can be passed through The fabric is again heated to the hot plastic state of softening.
Example 8
The rigidifying fabric F that glass fibre is prepared according to a kind of method, shows in 1 according to 3 use of example define in the method Composition 101 dipping as example 2 obtain glass fibre 110 silk 108 fabric 107 (referring to Fig. 9 and 10), to obtain It is impregnated with the fabric of the composition.
More specifically, and according to this example, and refer to Fig. 3, composition 101 is housed in pairs of rubber rollers 105 On reservoir 103 in.Fabric 107 in turn pass through composition 101, then pass through pairs of opposite rubber rollers 105 it Between, which is pressed on another one to one, and a certain amount of composition push-in is present in the silk to form fabric 107 In aperture between 108 fiber.Then, while leaving rubber rollers 103, stop the pressure to fabric 107, in silk 108 Aperture in a certain amount of composition 101 for being pushed be retained in the silk (such as aspirating by capillary), to make The substantially used up excessive composition in the surface of fabric, and the composition for the additional amount being not remain in fabric is adhered to rubber On rubber roller and return in reservoir 103.
Then by the dipping fabric so obtained in continuous baking oven about 160 DEG C at a temperature of heated about 2 Minute, so that the composition of dipping in the fabric is placed in the hot plastic state of softening.
Then, the fabric F (that is, the fabric impregnated with the composition for being converted into hot plastic state) so obtained prepares to be used for It is further processed, thermoplastic fabric is such as optionally configured to required size and/or shape, then heat cure processing makes group Object heat cure is closed, and provides rigidifying fabric by being crosslinked for the thermally resistant fiber glass of silk.If do not used immediately, it can permit and knit Object cools down at room temperature.
Example 9
The fabric F for obtaining from example 8 and cooling down at room temperature is cut into 3 inches × 3 inches of piece, is then placed in by pairs of Opposite half mold composition mold heat in, to soften and filter device 201a (referring to Fig. 6 and 7) is passed through compression moulding mould It is moulded into specific planform and orientation.Then, make forming fabric cooling.Compression moulding carries out at about 160 DEG C.
Then, the forming fabric so obtained prepares for further processing, and such as heat cure is handled, so that composition is warm Solidification, and rigidifying fabric is provided by being crosslinked for the thermally resistant fiber glass of the silk of glass fibre.
Example 10
The fabric F obtained from example 8 is cut into 3 inches × 3 inches of piece, and in the thermoplastic character for being still within softening It is placed on when state in the cold mold being made of pairs of opposite half mold, (referring to fig. 4 with 5) passes through so that filter device 201a Compression moulding and formed with specific planform and orientation.Compression molding carries out at about 150 DEG C.
Then, filter device 201a is carried out to heat cure to handle 2 minutes in 450 DEG C of baking oven, so that passing through glass fibers The crosslinking of dimension makes fabric rigidifying.It certainly, can be by any alternatively, if the fabric obtained from example 8 cools down at room temperature The fabric is again heated to the hot plastic state of softening by molding methods appropriate, and then carries out heat cure processing.It is this by Filter device 201a made of the rigidifying fabric derives from the 40L type fabric of glass fibre as defined above, the filter device With 0.0255cm2Aperture.
With reference to Fig. 7 and Fig. 8, filter device 201a can be used for low-pressure die casting plant 202a, which includes:
Accommodate the airtight reservoir 203a of liquid aluminium alloy 204a;
Mold 205a, the mold are preferably made of pairs of opposite part 205'a and 205'a, and 205 " a of part is Movably to allow to easily remove moulding article, the mold 205a is provided with filling access 207a, chamber 209a and installation Diffuser 211a on filling access 207a;
Filter device 201a;
Riser 213a, the riser have
The lower end ο 215a, the lower end are provided with lower orifice 217a, which immerses the liquid being contained in reservoir In aluminium alloy,
The upper end ο 219a, the upper end are provided with top aperture 221a, which can be with the filling access of mold 205a 207a connection, and the upper end is provided with the seating portion 223a around top aperture 221a, and
The promotion channel 225a of ο connection lower orifice and top aperture 221a, to work as upper hole mouth 221a and to be packed into When mouth 207a connection, the filling access 207a of reservoir and mold is in fluid communication, and filter device 201a passes through diffuser 211a contact;With
205a is entered reservoir 203a so that liquid aluminium alloy is shifted through riser from reservoir by pressurized air source " P " Promotion channel 225a, filter device 201a and the filling access 207a of 213a, with filled cavity 209a.Chamber 209a is contained in cooling In liquid aluminium alloy with formed moulding article and from chamber 209a remove moulding article after, obtained product have filtering Device is trapped in protrusion.The air being initially contained in chamber 209a is evacuated by aperture 227a.
Diffuser 211a applies slight pressure to the major part 257a of filter device 201a, to help in filter device Filter device 201a is held in place during the preparation of 201a.It is well known, in fact, that in the preproduction phase of filter Period, the pressure that the liquid by beginning to flow through filter applies is larger, and then when liquid flowing is established under the pressure Drop.
More specifically, filter device 201a is made of the fabric of at least one layer of rigidifying heat resistance fiber with reference to fig. 4 to fig. 6.It should Filter device 201a includes lower surface 251a, upper surface 253a, neighboring 255a, major part 257a and surrounds major part Outer peripheral portion 259a.A part of major part 257a and outer peripheral portion 259a are positioned across top aperture 221a.Peripheral part Divide 259a to form cavity 261a at upper face 253a, forms flange at the 251a of lower surface, the flange 261a takes downwards To the upper surface of major part 257a is positioned against diffuser 211a, and outer peripheral portion 259a is partly against seating portion 223a positioning.
More specifically, filter device 201a is additionally provided with ridge part 275a with reference to fig. 4 to fig. 6.Ridge part 275a is into one Step enhances the flintiness degree of gained filter device, so that filter device 201a is passing through liquid metal or conjunction in filter device The risk minimization deformed under the pressure of gold.Moreover, the ridge part horizontal extension or can prolong at a certain angle as shown in the figure It stretches, which is designed in the corresponding portion for being shelved on seating portion 223a.Ridge part 275a helps that filter device is made to exist Correct centering in mold and/or riser is easier.
Optionally, at the center of major part 257a, stainless steel binding stable 229a can be provided.Binding stable 229a permits The tool control filter device 201a allowable for being provided with magnet, so that outer peripheral portion 259a and ridge part 275a to be easily positioned (Magnetic tools are especially used, and more preferably with the Magnetic tools by robot manipulation) on corresponding seating portion 223a. Moreover, the presence of binding stable 229a allows to confirm filter device 201a being properly positioned (for example, using relative to seating portion 223a X-ray apparatus).
The specific structure and orientation of filter device 201a in low-pressure die casting plant 202a allows before filled cavity 209a Effectively filter liquid state aluminium alloy.More specifically, the filter device 201a is shown and the existing skill made of wire Those of art filter device is equally effective and immaculate.
Example 11
The piece of fabric (referring to Fig. 9) obtained from example 8 is cooled down at room temperature, is cut into 3 inches × 3 inches of piece, so It is put into the mold heat being made of pairs of opposite half mold afterwards, to soften and be molded by compression moulding with specific knot It is configured the first basket 451a (referring to Figure 11) of shape and orientation.Then, pass through any cutter device (such as scissors, knife etc.) appropriate It removes extra fabric and allows fabric cooling.Compression moulding carries out at 150 DEG C.
Wherein the first basket 451a has outer wall 453a and by inner wall 457a, end wall 459a and the aperture opposite with end wall 459a The chamber 455a that 461a is limited.
Then, the another piece of fabric obtained from example 8 is cooled down at room temperature, is cut into 3 inches × 3 inches of piece, then It is put into the mold heat being made of pairs of opposite half mold, to soften and be molded as that there is specific knot by compression moulding It is configured the second basket 471a (see Figure 12) of shape and orientation.Then, pass through any cutter device (for example, scissors, knife etc.) appropriate It removes extra fabric and allows fabric cooling.Compression moulding carries out at 150 DEG C.
Second basket 471a has outer wall 473a and is limited by inner wall 477a, end wall 479a and the aperture opposite with end wall 479a Chamber 475a.
The open end of first basket 451a is accommodated in the chamber 475a of the second basket 471a, is had a planform to limit and is taken To filter device 401a, and filter device is provided with chamber 493a, upper surface 495a, lower surface 497a and side surface 499a. Optionally, as shown in figure 14, filter device 401a is optionally further provided with the filter pad being accommodated in the chamber 493a 500a。
The end wall 459a of first basket 451a corresponds to the lower surface 493a of filtering body 401a, and the end of the second basket 471a Wall 479a corresponds to the upper surface 495a of filtering body 401a.The outer wall 453a's of first basket 451a is dimensioned to and the second basket The inner wall 477a frictional fit of 471a, the outer wall 453a of the second basket 471a correspond at least partially to filtering body 491a (i.e. Filter device 401a) side surface 499a.Alternatively, the outer wall 479a's of the second basket 471a can be sized to and the first basket 451a Inner wall 457a frictional fit, the filtering body 491a that the outer wall 473a of the first basket 471a is corresponded at least partially to (filters Device 401a) side surface 499a.
Then, the upper surface 495a of filter device 401a has major part 492a, and the following table of filter device 401a There is face 497a outer peripheral portion 494a, the major part 495a to be used for against the mold for being located in low-pressure die casting plant 402a Diffuser 411a positioning on filling access 407a;And the outer peripheral portion 494a is for being located in low-pressure die casting plant 402a Riser 413a top aperture 421a on, the outer peripheral portion 494a be orientated to against surround top aperture 421a promotion The seating portion 423a of pipe 413a is positioned.
First basket and the second basket are provided with the liquid for allowing to further prevent filter device 401a by passing through filter device The pressure of the flowing of metal or alloy and the structure feature deformed.More specifically, the first basket 451a has by forming edge The lateral part and bottom part of the outer peripheral portion 452a connection of 454a;And the outer wall of the second basket 471a has by formation edge The lateral part and top section of the outer peripheral portion 472a connection of 474a.
Then, the filter device 401a still in the thermoplastic sexual stage so obtained is ready for being further processed, all If heat cure is handled, so that composition heat cured, and offer is crosslinked by rigid by the thermally resistant fiber glass for the silk for forming fabric Change filter device 401a made of fabric.Preferably, thermosetting property filter device 401a by by thermoplastic filter device at 450 DEG C Baking oven in carry out heat cure and handle 2 minutes to prepare so that making to knit by being crosslinked for the glass fibre of the silk for forming fabric Object rigidifying.
Then, filter device 401a is ready for filtering liquid metal such as liquid aluminum or aluminum alloy, especially in low pressure In casting process.Since this filter device 401a is made of the rigidifying fabric, the rigidifying fabric is from as above The 40L type fabric of the glass fibre of definition, the filter device have 0.0255cm2Aperture.When the filtering for liquid aluminium, Filter device 401a shows effective and immaculate as those of prior art filter made of wire.
More specifically, filter device 401a can be used for low-pressure die casting plant 402a with reference to Figure 15 and Figure 16, the low pressure casting Equipment includes:
Accommodate the airtight reservoir 403a of liquid aluminium alloy 404a;
Mold 405a, the mold are preferably made of pairs of opposite part 405'a and 405'a, and 405 " a of part is Movably to allow to easily remove moulding article, the mold 405a is provided with filling access 407a, chamber 409a and installation Diffuser 411a on filling access 407a;
Filter device 401a;
Riser 413a, the riser include
The lower end ο 415a, the lower end are provided with lower orifice 417a, which immerses the liquid being contained in reservoir In aluminium alloy,
The upper end ο 419a, the upper end are provided with top aperture 421a, which can be with the filling access of mold 405a 407a connection, and the upper end is provided with the seating portion 423a around top aperture 421a, and
The promotion channel 425a of ο connection lower orifice and top aperture 421a, to work as upper hole mouth 421a and to be packed into When mouth 407a connection, the filling access 407a of reservoir and mold is in fluid communication, and filter device 401a passes through diffuser 411a contact;With
405a is entered reservoir 403a so that liquid aluminium alloy is shifted through riser from reservoir by pressurized air source " P " Promotion channel 425a, filter device 401a and the filling access 407a of 413a, with filled cavity 409a.Chamber 409a is contained in cooling In liquid aluminium alloy with formed moulding article and from chamber 409a remove moulding article after, obtained product has tired Filter device in protrusion.The air being initially contained in chamber 409a is evacuated by aperture 427a.
Diffuser 411a applies slight pressure to major part 457a, with help during the preparation of filter device incited somebody to action Filter device 401a is held in place.It is well known, in fact, that liquid starts to flow during the preproduction phase of filter device It is bigger to cross the filter device pressure applied, and the then pressure decline when liquid flowing is established.As described above, When the filtering for liquid aluminium, filter device 401a is shown and those of prior art filter made of wire It is equally effective and immaculate.
Example 12
The fabric that example 3 obtains is cut into 5 inches × 21/2 inch of piece, and in the hot plastic state for being still within softening When, it is put into the cold mold being made of pairs of opposite half mold, to obtain the fabric of required shape by compression moulding.So The fabric of acquisition is " M " shape.
Then, " M " the shape fabric so obtained is carried out to heat cure to handle 2 minutes in 450 DEG C of baking oven, to pass through The crosslinking of glass fibre makes fabric rigidifying.
Thereafter, the rigidifying fabric of the forming so obtained can be used as liquid metal (such as liquid aluminum or aluminum alloy) Filter is especially used in gravity casting process.
Certainly, alternatively, if the fabric obtained from example 3 cools down at room temperature, any method appropriate can be passed through The fabric is again heated to the hot plastic state of softening.
Example 13
The fabric that example 3 obtains is cut into 5 inches × 21/2 inch of piece, and in the hot plastic state for being still within softening When, it is put into the mold heat being made of pairs of opposite half mold, to obtain the fabric of " M " shape by compression moulding.So The forming fabric of acquisition is " M " shape.
Then, " M " shape fabric is carried out to heat cure to handle 2 minutes in 450 DEG C of baking oven, so that passing through glass fibre Crosslinking make fabric rigidifying.
Thereafter, the rigidifying fabric 643 (see Figure 21) of " M " shape so obtained can be used as liquid metal (such as liquid State aluminum or aluminum alloy) filter, be especially used in gravity casting process.
Example 14
This is illustrated casts product made of aluminum in two-part moudle 621.The two-part moudle 621 includes part 623 and part 625 (referring to Figure 17 and 18), each part be provided with chamber, the chamber two parts against each other when limit, mold Chamber 629, chamber filling access 631, mold conduit 633 and mold holding part 635.Mold conduit 633 has aperture 637 and aperture 639, aperture 639 and mold cavity 629 are in fluid communication.Part 625 be additionally provided with allow to be contained in air in mold cavity 629 with Liquid aluminium fills the aperture 626 escaped during the mold cavity 629.
As illustrated in figures 19 and 20, according to the prior art, ceramic foam filter 641 is commonly used in the molding of the prior art In method.It is entire that the ceramic foam filter 641 is that one chip parallelepiped and occupying is limited by holding part 635 Capacity.
In this example, the ceramic foam filter 641 is replaced by " M " shape filter 643 that example 13 obtains.More Specifically, " M " shape filter 643 has such a size that the volume of filter is accommodated in mold holding part 635 completely Interior, wherein parallel branch 636 and the opposite wall 635a of holding part 635 are substantially coplanar, and the top of the arch 638 of " M " with Mold cavity 629 is oppositely oriented.
Then, liquid aluminium is poured into aperture 637 to " M " shape mistake to flow through conduit 633, be located in holding part 635 Filter and chamber filling access and chamber 629 itself.More specifically, this method that liquid aluminium pours into mold is known as gravity casting Make method.
Then, once liquid aluminium is cooling, two parts of two-part moudle is separated and remove solid articles.
Will correspond to conduit 633, holding part 635 and include " M " shape filter 621 solid articles part and complete Product separates and is recycled for recycling purpose." M " shape filter is shown as effective and not no ceramic foam filter Disadvantage.
The present invention is described about the preferred embodiment of the present invention.The description and the appended drawings are only used for helping to understand this Invention, limits its range without being intended to.It will be clear to someone skilled in the art that without departing from the scope of the invention, Many change and modification can be carried out to embodiments of the present invention.Present invention encompasses these change and modification.It now will be The present invention is described in appended claims.

Claims (20)

1. a kind of filter device for being filtered to liquid metal or liquid metal alloy,
Wherein, the filter device has lower surface, upper surface, neighboring, major part and around the major part Outer peripheral portion, the outer peripheral portion are configured to form cavity at the upper surface and form flange at the lower surface, and And
Wherein, the outer peripheral portion is additionally provided with the ridge part around the outer peripheral portion.
2. filter device according to claim 1, wherein the filter device described in the filter device is by heat resistance fiber Rigidifying fabric be made or be made of the silk of heat resistance fiber, the filter device is impregnated with mixed comprising following product A and product B Close the composition of object:
The product A is obtained by the polymerization of saccharide unit;And
The product B is made of at least one inorganic colloid bonding agent,
The composition is in thermoset stage.
3. filter device according to claim 2, wherein the major part is that vertex is orientated towards the upper surface Dome.
4. filter device according to claim 3 is additionally provided with the insertion piece made of magnetisable material, the insertion piece For manipulating the filter device using the tool for being provided with magnet.
5. filter device according to claim 4, wherein the heat resistance fiber is glass fibre, silicon oxide fibre or glass The mixture of glass fiber and silicon oxide fibre, and wherein, the product A is obtained by the caramelization of mixture M, described Mixture M includes sucrose, water and optionally at least a kind of additive, and the additive selects free acid, inorganic wetting agent and acid The group of acid phosphate adhesive composition.
6. filter device according to claim 2, wherein there is the major part vertex to be orientated towards the upper surface Frusto-conical.
7. filter device according to claim 6 is additionally provided with the insertion piece made of magnetisable material, the insertion piece For manipulating the filter device using the tool for being provided with magnet.
8. filter device according to claim 7, wherein the heat resistance fiber is glass fibre, silicon oxide fibre or glass The mixture of glass fiber and silicon oxide fibre, and wherein, the product A is obtained by the caramelization of mixture M, described Mixture M includes sucrose, water and optionally at least a kind of additive, and the additive selects free acid, inorganic wetting agent and acid The group of acid phosphate adhesive composition.
9. a kind of filter device for being filtered to liquid metal or liquid metal alloy, wherein the filter device by First basket and the second basket are made,
Wherein, the chamber that first basket has outer wall and limited by inner wall, end wall and the aperture opposite with end wall,
Wherein, the chamber that second basket has outer wall and limited by inner wall, end wall and the aperture opposite with end wall,
Wherein, the open end of first basket is placed in the chamber of second basket, is had a planform to limit and is taken To and including chamber, upper surface, lower surface and the filtering body of side surface,
Wherein, when the outer wall of first basket is sized to cooperate against the inner wall of second basket, second basket Outer wall corresponds at least partially to the side surface of the filtering body;Or when the outer wall of second basket is sized to cooperate When against the inner wall of first basket, the outer wall of first basket corresponds at least partially to the side surface of the filtering body, And
Wherein, the outer wall of first basket has the lateral part and top section connected by the outer peripheral portion at formation edge;And And the outer wall of second basket has the lateral part and bottom part connected by the outer peripheral portion at formation edge.
10. filter device according to claim 9, wherein the end wall of first basket corresponds to the filter device Lower surface, and the end wall of second basket corresponds to the upper surface of the filter device.
11. filter device according to claim 9, wherein the filter device further includes being located at the intracavitary filtering Pad.
12. filter device according to claim 9, wherein the filter device is made of the rigidifying fabric of heat resistance fiber Or be made of the silk of heat resistance fiber, the filter device is impregnated with the composition of the mixture comprising following product A and product B:
The product A is obtained by the polymerization of saccharide unit;And
The product B is made of at least one inorganic colloid bonding agent,
The composition is in thermoset stage.
13. filter device according to claim 12 is additionally provided with the insertion piece made of magnetisable material, the insertion Part is for manipulating the filter device using the tool for being provided with magnet.
14. filter device according to claim 12, wherein the heat resistance fiber be glass fibre, silicon oxide fibre or The mixture of glass fibre and silicon oxide fibre, and wherein, the product A is obtained by the caramelization of mixture M, institute Stating mixture M includes sucrose, water and optionally at least a kind of additive, the additive select free acid, inorganic wetting agent and The group of acid phosphate adhesive composition.
15. a kind of filter device for being filtered to molten metal or molten metal alloy, wherein the filter device is The fabric of wire or the fabric of rigidifying heat resistance fiber, the filter device have a shape such that the shape waits being accommodated in and set It being equipped in the holding part of the casting mould of at least one filling access, wherein the holding part is parallelepiped-shaped, and its In, the fabric limits " M " shape filter, and " M " the shape filter has arcuate part and a pairs of parallel branch, it is described at Pair pairs of opposed end of the parallel branch respectively with the holding part of parallelepiped-shaped it is substantially coplanar, the arcuate part With the top for being orientated towards the chamber or being oppositely oriented with the chamber.
16. filter device according to claim 15, wherein the top of the arcuate part is oriented to and the chamber phase Instead.
17. filter device according to claim 15, wherein the fabric is made of the stainless steel wire being woven together.
18. filter device according to claim 15, wherein the filter device is by the heat resistance fiber that is woven together Rigidifying fabric is made.
19. filter device according to claim 18, wherein the rigidifying fabric of the heat resistance fiber is by heat cure packet What the composition of the mixture containing following product A and product B obtained;
The product A is obtained by the polymerization of saccharide unit;And
The product B is made of at least one inorganic colloid bonding agent;
The composition is submerged in the fabric of heat resistance fiber, and the fabric of the heat resistance fiber is substantially free of one or more Sizing agent, the sizing agent are made of organic polymer.
20. filter device according to claim 19, wherein the heat resistance fiber be glass fibre, silicon oxide fibre or The mixture of glass fibre and silicon oxide fibre, and wherein, the product A is obtained by the caramelization of mixture M, institute Stating mixture M includes sucrose, water and optionally at least a kind of additive, the additive select free acid, inorganic wetting agent and The group of acid phosphate adhesive composition.
CN201780046951.4A 2016-07-29 2017-07-28 The filter method of the filter device and use filter device of filtering liquid metal or its alloy Pending CN109562310A (en)

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US15/224,028 US10434569B2 (en) 2014-01-23 2016-07-29 Filtration device for the filtration of a liquid metal or an alloy thereof, and a filtration method using said filtration device
US15/224,028 2016-07-29
PCT/CA2017/050908 WO2018018156A1 (en) 2016-07-29 2017-07-28 Filtration device for the filtration of a liquid metal or an alloy thereof, and a filtration method using said filtration device

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CN112059165A (en) * 2020-08-31 2020-12-11 安徽省含山县威建铸造厂(普通合伙) Preparation method of molten steel filter screen for casting

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CN110303142B (en) * 2019-08-13 2021-08-27 巢湖宜安云海科技有限公司 Magnesium alloy casting gate device
CN112059165A (en) * 2020-08-31 2020-12-11 安徽省含山县威建铸造厂(普通合伙) Preparation method of molten steel filter screen for casting
CN112059165B (en) * 2020-08-31 2021-09-28 安徽省含山县威建铸造厂(普通合伙) Preparation method of molten steel filter screen for casting

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KR20190031507A (en) 2019-03-26
WO2018018156A1 (en) 2018-02-01
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BR112019001620A2 (en) 2019-06-11

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