CN102143812B - A process for preparing foundry sand and a system therefor - Google Patents
A process for preparing foundry sand and a system therefor Download PDFInfo
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- CN102143812B CN102143812B CN200980134747.3A CN200980134747A CN102143812B CN 102143812 B CN102143812 B CN 102143812B CN 200980134747 A CN200980134747 A CN 200980134747A CN 102143812 B CN102143812 B CN 102143812B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/18—Plants for preparing mould materials
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Abstract
The objects of the present invention are to solve the problems wherein the properties of the foundry sand vary due to the variations in the weight of the core, the weight of the poured molten metal, the cooling time, the constituents of the sand, and to provide uniform foundry sand to a line for molding. A process is disclosed for preparing foundry sand wherein sand is returned per mold after pouring molten metal and wherein the sand is delivered to a line for molding through a line for preparing the sand. The process comprises the steps of obtaining information for classifying the sand Isc, which includes the constituents of the sand, by using information on a pattern Im; using the information for classifying the sand Isc to identify each batch of the returned foundry sand per mold to be formed; storing the returned foundry sand, for which there is the information for classifying the sand Isc, per mold in a storage room for returned foundry sand; and taking out the returned foundry sand, for which there is the information for classifying the sand Isc, per mold from the storage room for returned foundry sand to mull the sand.
Description
Technical field
The present invention relates to a kind of method for the casting mold sand of preparing casting usefulness and a kind of system for the casting mold sand of preparing casting usefulness.More specifically, the present invention relates to a kind of utilization about the information Im of model be used for prepare the method for casting mold sand and a kind of utilization about the system that is used for preparing casting mold sand of the information Im of model.
Background technology
In conventional method that be used for to prepare casting mold sand and since experience near foundry goods first sand that composition changes with because do not experience basically away from foundry goods second sand that composition changes by recovery separately in different production lines, to prepare.In the production line for the treatment of second sand, processing method comprises the steps: to remove impurity particle (except de-iron), sand cooling but and to sand is carried out the mulling processing as main sand.In the production line for the treatment of first sand, processing method comprises the steps: to remove impurity particle (except de-iron), with sand cooling but and sand is carried out mulling handle sand as a supplement.Be in to first sand carry out after the step that mulling handles the production line that is used for first sand be in the production line that is used for second sand that second sand is carried out the step place that mulling handles and merge.Be connected to the production line that is used for first sand that is in before the step of removing impurity particle from the bypass production line that is used for molded production line.Thisly be known as for the treatment of from being used for the method for various batches the sand with heterogeneity that molded production line reclaims for the method for preparing casting mold sand.According to this method, prepare uniform casting mold sand, that is, and in the not variation (seeing JP H5-169187A etc.) of quality of casting mold sand.
By said method, can reclaim dividually near the casting mold sand of foundry goods with away from the casting mold sand of foundry goods.
Yet, first sand comprise have different core weight, different by the sand of casting metal weight, different cool time, different sand compositions etc.Therefore, always do not obtain uniform sand, that is, and without any the sand that changes.There is similar problem in second sand.
In another kind of conventional method, the recovery casting mold sand of quality the unknown was divided in a plurality of locker rooms in each time period.Taking out the sand of same amount continuously from each locker room handles sand is carried out mulling.Suppress the variation of the composition of sand thus.Yet, in the method, the composition of the sand in each locker room be change frequently with the unknown.Therefore, in the method, handle the sand that not acquisition has even quality by sand being carried out mulling.
Summary of the invention
Of the present invention for the method for preparing casting mold sand and the purpose that is used for preparing the system of casting mold sand be to solve the problem of the variation of casting mold sand.Described variation is by the weight of core, the composition of different sand causes by the weight of casting metal, cool time or with batch difference of sand.Purpose also is to provide uniform casting mold sand to be used for molded production line, and this casting mold sand is more even than conventional sand.
To achieve these goals, provide of the present invention for the method for preparing casting mold sand, wherein, after casting molten metal, reclaim casting mold sand at each mould, and wherein, casting mold sand is transported to for molded production line by the production line that is used for preparation sand.This method comprises the steps: by using the information Im about model to obtain for the information Isc that sand is classified; Use the information Isc that is used for that sand is classified to reclaim casting mold sand at every batch of mould identification to be formed; The recovery casting mold sand that will have for the information Isc that sand is classified is stored in recovery casting mold sand locker room; And will take out from reclaiming casting mold sand locker room at the recovery casting mold sand that has for the information Isc that sand is classified of each mould, handle sand is carried out mulling.Be used for to the information Isc that sand is classified be every batch of sand is obtained and comprise data about the composition of sand.
To achieve these goals, provide of the present invention for the method for preparing casting mold sand, wherein, after casting molten metal, reclaim casting mold sand at each mould, and wherein, casting mold sand is transported to for molded production line by the production line that is used for preparation sand.This method comprises the steps: by using the information Im about model to obtain for the information Isc that sand is classified; Use the information Isc that is used for that sand is classified to reclaim casting mold sand at every batch of mould identification to be formed; The recovery casting mold sand that will have for the information Isc that sand is classified is stored in recovery casting mold sand locker room; And from reclaim casting mold sand locker room, take out the recovery casting mold sand that has for the information Isc that sand is classified and handle sand is carried out mulling.Be used for to the information Isc that sand is classified be a collection of sand is obtained and comprise data about the composition of sand.
Word " about the information Im of model " refers to the intrinsic information of model.Being used for molded model changes with each as-cast product.The parameter and the casting condition that are used for each machine change with model.The intrinsic this information of model is called as " about the information Im of model ".For example, it is included in the data that are stored in when forming model in the computer (or programmable controller, abbreviate " computer " hereinafter as), and the data of obtaining on computers when forming mould about mould.Therefore, the information Im about model is that " mobile (shift) " is to follow the data of mould.Herein, term " movement " refers to and makes the intrinsic information of mould as being available about the information Im of model at the place, downstream that mould will move.Mobile data are called as " mobile data ".
The information Isc that is used for sand is classified describes the feature that reclaims casting mold sand in detail, and it comprises the composition of the sand that obtains from the information Im about model.
Therefore, of the present invention being characterized as: will be used for preparing casting mold sand about the information Im of model.When forming mould, obtain the information Isc that sand is classified of being used for that reclaims the casting mold sand about all based on the information Im about model.Mould is for the unit of preparing to reclaim casting mold sand.By using the information Isc that is used for sand is classified to prepare casting mold sand.
To achieve these goals, provide of the present invention for the method for preparing casting mold sand, wherein, after casting molten metal, reclaim casting mold sand from mould, and wherein, casting mold sand is transported to for molded production line by the production line that is used for preparation sand.This method comprises the steps: by using the information Im about model to obtain for the information Isc that sand is classified; Use the information Isc that is used for that sand is classified to reclaim casting mold sand at mould identification to be formed; To have recovery casting mold sand for the information Isc that sand is classified is stored among of a plurality of recovery casting mold sand locker room; And will mix sand is carried out mulling from the different recovery casting mold sand for the information Isc that sand is classified of having of a plurality of locker rooms and handle.The information Isc that is used for sand is classified obtains about sand, and should be used for the information Isc that sand is classified is comprised data about the composition of sand.
In addition, to achieve these goals, being characterized as for the method for preparing casting mold sand of the present invention: reclaiming casting mold sand locker room is the hopper of being made by cloth.Such hopper is in storage wet---in other words for adhere to easily---when reclaiming casting mold sand for preventing that sand is attached to for the hopper is effective.
To achieve these goals, of the present inventionly comprise for the system of preparing casting mold sand: computer, this computer are used for by using information Im about model to obtain about reclaiming the information Isc that sand is classified of being used for of casting mold sand; Reclaim casting mold sand locker room, this recovery casting mold sand locker room is used for storing the recovery casting mold sand that has for the information Isc that sand is classified; And puddle mixer, this puddle mixer is used for being used for the information Isc that sand is classified is come sand is carried out the mulling processing based on what obtain about recovery casting mold sand.
In addition, to achieve these goals, the system for preparation casting mold sand of the present invention comprises: be used for by using the information Im about model to obtain about reclaiming the computer for the information Isc that sand is classified of casting mold sand; Reclaim casting mold sand locker room, this recovery casting mold sand locker room is used for storing dividually having for the recovery casting mold sand information Isc that sand is classified, that be classified as several classifications; Be used for to send signal to mix the computer through the sand of classification of a plurality of locker rooms; And puddle mixer, this puddle mixer is used for that the sand that mixes by the signal from computer is carried out mulling to be handled.
To achieve these goals, of the present inventionly comprise and to come the computer proofreading and correct and revise about the information Im of model and the information Isc that is used for that sand is classified by using about the data that are used for preparing the production line of casting mold sand or be used for molded production line for the system of preparing casting mold sand.
By the present invention, can estimate to reclaim the composition of casting mold sand by using the information Isc for sand is classified that can obtain from the information Im about model.Therefore, use is identified every batch of recovery casting mold sand for the information Isc that sand is classified and is made that reclaiming casting mold sand can suitably be mixed.Thus, provide uniform casting mold sand for being used for molded production line.
Can estimate to reclaim the composition of casting mold sand by using the information Isc for sand is classified that can obtain from the information Im about model.Being used for that the information Isc that sand is classified is used to identify every batch reclaims casting mold sand and is used to each batch recovery casting mold sand is stored in different locker rooms.The recovery casting mold sand that has for the information Isc that sand is classified is suitably mixed.Thus, provide uniform casting mold sand for being used for molded production line.
In addition, be the hopper of being made by cloth because reclaim casting mold sand locker room,---in other words for adhere to easily---is effective for preventing that sand is attached to for the hopper when reclaiming casting mold sand so this locker room is in storage wet.Therefore, the present invention has many advantages.
The basic Japanese patent application No.2008-308231 that on December 3rd, 2008 submitted to incorporates the application in this mode integral body with reference.
From the following detailed description that provides, the present invention will be able to more comprehensively understand.Yet, this detailed description and the specific embodiment be expectation of the present invention embodiment illustration and only be described for purposes of illustration.Describe in detail based on this, various possible variations and modification will be apparent for those of ordinary skills.
The Applicant none is intended to offer as a tribute any disclosed embodiment to the public.Therefore, in disclosed variation and revising, those may be not variation in the literal scope that falls into current claim and the meaning that is modified in doctrine of equivalents constitute a part of the present invention.
The use of the article " a " in specification and the claim, " an " and " the " and similar indication thing should be interpreted as containing single and a plurality of, unless point out in addition in this article or clearly propose opposite saying by context.The use of any example and all examples or the exemplary language that provides in this article (for example, " such as ") only is intended to illustrate better the present invention, does not therefore limit the scope of the invention, unless stated otherwise.
Description of drawings
Fig. 1 is the schematic diagram that the system for preparation casting mold sand of the present invention is shown and is used for molded production line.
Fig. 2 is the schematic diagram that the example of the information Im about model of the present invention is shown.
Fig. 3 is the flow chart of the method that is used for preparation casting mold sand of embodiments of the present invention.
Fig. 4 shows the embodiment of the hopper of being made by cloth of the present invention.
Fig. 5 is the side view of the hopper of Fig. 4.
Fig. 6 is the schematic diagram that the system for preparation casting mold sand of the present invention is shown and is used for another embodiment of molded production line.
Fig. 7 is the schematic diagram that another example of the information Im about model of the present invention is shown.
Fig. 8 is the flow chart of the method that is used for preparation casting mold sand of another embodiment of the invention.
Fig. 9 is the schematic diagram that another example for the information Isc that sand is classified of the present invention is shown.
The specific embodiment
Now, describe for implementing optimal mode of the present invention.The present invention relates to for the method for preparing casting mold sand, wherein, after casting molten metal, reclaim casting mold sand from mould, thereby it is transported to for molded production line by the production line that is used for preparation sand.This method comprises by using information Im about model to obtain step for the information Isc that sand is classified.Information Isc comprises the composition of sand, and information is to obtain about sand.This method also comprises the steps: to use for the information Isc that sand is classified to reclaim casting mold sand at every batch of mould identification to be formed; To be stored at the recovery casting mold sand with information Isc of each mould and reclaim in the casting mold sand locker room; And will from the locker room, take out at the recovery casting mold sand with information Isc of each mould sand is carried out mulling and handle.Can not only take out described sand at each mould, and can take out described sand at a plurality of moulds.
Word " composition of sand " refers to the content of the basic sand that is included in as the component that forms casting mold sand (damp sand (green sand)) in the casting mold sand, clay, coal dust, slurry, water etc. or the ratio of content.It also comprises the content of thermal denaturation material (being commonly referred to oolite), fine grained etc. or the ratio of content, and in the repeated use process of sand, these materials are formed on the surface of sand particle.
Word " production line that is used for preparation sand " refers to the machine of all execution the following steps of the Casting Equipment of using damp sand.Described step comprises takes out foundry goods from mould, mould is pressed into the sand particle, removes impurity particle from sand, and by adding water sand is cooled to suitable temperature so that sand is stored in the locker room.Described step also comprises adding an amount of water and various additive to take out sand from the locker room and they being mixed with mulling to be handled.Described step also comprises provides sand to being used for that sand is carried out molded production line.Sand splits into particle (sand under this state is called as the sand of handling through mulling) after mulling is handled.Described machine comprises and reclaims sand locker room, puddle mixer, additive hopper, is used for watering the device of water filling etc.
Word " for molded production line " refers to the machine of all execution the following steps of the Casting Equipment of using damp sand.Described step comprises sand is thrown in the container, undertaken moldedly by sand being applied power then, and described container is made up of the model of foundry goods to be produced and the sandbox that receives sand.Described step also comprises core is placed in the mould, makes the sandbox coupling, and poured with molten metal in mould, is made being cooled off by casting metal and solidifies in the mould, and take out the foundry goods through cooling off from mould.The machine etc. that this machine comprises moulding press, automatic pouring machine and is used for taking out foundry goods.They generally include the machine that is used to form cast gate and pore.Two kinds of models are arranged, that is, and the model that mould transmits with sandbox, and after molding, sandbox is removed from mould and only transmit the model of mould.
Word " is categorized into several classifications " and refers to by considering that will reclaim casting mold sand about the influence of the characteristic of the sand of information Im of model is categorized into several classifications.The amount of the amount by paying special attention to additive, the water of interpolation and be used for that sand is carried out the time that mulling handles sand is classified.For example, sand is categorized into following classification: the recovery casting mold sand that comprises the core sand of much higher content than the sand of other batch; Has greater weight by casting metal and the sand that stands bigger heat affecting than the sand of other batch; Than the sand of other batch have lower weight by casting metal and the sand that comprises less core sand; Normal sands etc.
Word " about the information Ic of classification " refers to the code that has been classified into the recovery casting mold sand of several classifications for identification.In the embodiment that is described below, it is expressed as A, B or C, and perhaps 1,2 or 3.
In addition, word " for the information Isc that sand is classified " refers to the characteristic (Sa, the Sb that reclaim casting mold sand, Sc,), described characteristic comprises the composition of sand, and described characteristic is by being identified about the information Im of model or about the information Ic that classifies.
By way of parenthesis, wait to distinguish and reclaim casting mold sand S by reclaiming casting mold sand S is expressed as and the information Isc that is used for sand is classified is corresponding SA, SB, SC.
Word " reclaims casting mold sand locker room " and refers to the equipment of storing sand, obtains described sand by mould being crushed, removed impurity particle and by adding water sand being cooled to proper temperature.In the present invention, reclaim the equipment that casting mold sand locker room is made up of a plurality of containers, described container is used for storing the recovery casting mold sand for the information Isc that sand is classified of having at each mould; Perhaps, reclaiming casting mold sand locker room is total for a plurality of containers of the sand that has information Isc based on storage about the information Ic of classification and dividually.
Word " sand is carried out mulling to be handled " refers to a step, this step is used for reclaiming casting mold sand and will reclaiming after casting mold sand integrates with the additive (bentonite) that is used as bond taking out from the locker room at each mould, should reclaim casting mold sand and mix with various additives and water and stir.Show all properties of mould thus.
First embodiment
Now, based on embodiment the present invention is described.Fig. 1 illustrates the system that is used for preparation casting mold sand that uses in embodiments of the present invention and the schematic diagram that is used for molded production line.In Fig. 1, be used for the production line 1 of casting by being used for molded production line 2 (in some cases, can comprise automatic pouring machine 3) and forming for the production line 4 of preparing casting mold sand.The production line 1 that is used for casting by the computer system control of control entire equipment.The computer 5 that constitutes the part of computer system obtain about through the recovery casting mold sand of cooling, be used for information Isc that sand is classified.Computer 5 comes estimated information Isc by using the information Im about model.
At the production line 4 that is used for preparing casting mold sand, shake out mould by the machine 6 that is used for the taking-up foundry goods.To be collected in recovery sand container 7 at the recovery casting mold sand S that has for the information Isc that sand is classified of each mould.After process was used for removing the screening machine 8 and sand cooler 9 of impurity particle, sand S was stored in by container 7 and reclaims in the casting mold sand locker room 10.
Until the step that is shaked out mould by the machine 6 that be used for to take out foundry goods, be used for information Isc that sand is classified all as the intrinsic information of mould and " movement " (" mobile data ").In addition, for each mould, from sand through the screening machine 8 that is used for removing impurity particle and sand cooler 9 until sand be sent to reclaim casting mold sand locker room 10 till, can keep these " mobile data ".
Production line 4 that be used for to prepare casting mold sand comprises puddle mixer 11, and 11 pairs of described puddle mixers connect the principle of a mould based on a mould and carry out mulling and handle from reclaiming the recovery casting mold sand S that dishes out casting mold sand locker room 10.
In addition, the information Isc that is used for sand is classified can be used for estimating the amount of the cooling water that sand cooler 9 is required.
Fig. 2 shows the example of using for the system of preparing casting mold sand of the present invention about the information Im of model.Can not only comprise for the production to equipment about the information Im of model being optimized required information, and comprise the information that foundry goods is intrinsic.The weight of the metal that it can comprise the weight of required number, the product of title, product or the mould to be formed of product, the material of product, the temperature of melt metal of being poured into a mould, poured into a mould, the weight of core maybe will be blended in the weight of the core sand in the sand of recovery, the method that is used to form core, the time that the cooling of the motlten metal in the mould is required etc.In fact, some in the only selection information.The intrinsic information of foundry goods can comprise the position of the position in the method that is used to form core, output, aperture and number, cast gate and number etc.
The operation of said structure is described now.Fig. 3 is the flow chart for the method for preparing casting mold sand of the present invention.
At first, obtain for the information Isc that sand is classified by using the information Im about model, be used for the information Isc that sand is classified is comprised the composition of sand.
Then, obtain the information Isc that sand is classified of being used for about the recovery casting mold sand of each mould to be formed.Thus, obtain information Isc about each mould.Therefore, it is corresponding to the recovery casting mold sand of each mould.
Information Im about model is the data of each mould to be formed being obtained by computer 5.Information Im be " movement " thus follow mould " mobile data " or be stored in data on the storage device (such as bar code) of following mould.Therefore, by using the information Im about model, be used for the information Isc that sand is classified is stored as " movement " at computer.Information Im about model can be stored in the computer 5 when forming model.Collect and transmit the recovery casting mold sand S (having a kind of sand SA of composition, the sand SC that has the sand SB of another kind of composition and have another kind of composition) that has for the information Isc that sand is classified.Then, will be stored at the recovery casting mold sand S of each mould in the recovery casting mold sand locker room 10 as the recovery casting mold sand S that has for the information Isc that sand is classified.Thereby, have (Sa, Sb, Sc for the information Isc that sand is classified ...) each batch of appropriate section reclaim casting mold sand (SA, SB, SC ...) be that sand at these batches is collected under the state in the cell therefor 7 and is stored in and reclaims in the casting mold sand locker room 10.
Handle for sand being carried out mulling, the recovery casting mold sand S for the information Isc that sand is classified that will have each mould is thrown into puddle mixer 11 by the conveyer (not shown).
In addition, because puddle mixer 11 is connected to moulding press 12 by conveyer line, the device 14 that is used for the hopper 13 of additive and is used for watering water filling, therefore according to the instruction by the signal transmission, in puddle mixer 11, mix sand and additive (as bentonite, extra large coal, slurry and fresh sand) and the necessary water of optimum content.Obtain the casting mold sand with uniform quality thus.
As mentioned above, by the present invention, can be according to the composition of estimating sand about the information Im of model, therefore, be used for that by use the information Isc that sand is classified is identified every batch of recovery casting mold sand and realize best mulling processing, the described information that sand is classified is to obtain from the information Im about model.Provide uniform casting mold sand to being used for molded production line thus.
In addition, can preferably include the weight of core about the information Im of model.By doing like this, can estimate to be blended in the weight that reclaims the core sand in the casting mold sand.Thus, the water that to be added and the amount of additive have been optimized.
Can preferably include the weight of the motlten metal of being poured into a mould about the information Im of model.By doing like this, can estimate the loss of the additive that in the casting mold sand that mulling is handled, caused by heat and the temperature of sand.Thus, the water that to be added and the amount of additive have been optimized.
In addition, the information Im about model can preferably include the required time of metal that cooling is poured into a mould.By doing like this, can estimate in the casting mold sand that mulling is handled the loss of the additive that the heat by motlten metal causes and the temperature of sand.Thus, the water that to be added and the amount of additive have been optimized.
Can be during the step of sand being carried out the mulling processing, based on the information Isc that is used for sand is classified, from being used for keeping the hopper of additive to add additive and water.By this method, can know the composition of sand, and the composition of sand is unknown when collecting sand with the method for routine.Thus, the water that to be added and the amount of additive have been optimized.
Because be used for the information Isc that sand is classified is comprised information about the fuel factor that reclaims casting mold sand S, so can estimate the temperature of sand.This temperature can be used for the amount that estimation will be provided to the water of sand cooler 9.
As shown in Figure 4, reclaiming casting mold sand locker room 10 can be the hopper of being made by cloth 15.The hopper of being made by cloth 15 shown in Fig. 4 and Fig. 5 comprises framework 16, hopper body 17 and conveyer belt 18, and framework 16 is box structures of shaped steel, and hopper body 17 is attached to framework 16, and conveyer belt 18 is arranged in below the hopper body 17 and is attached to framework 16.
Usually, this hopper be made by steel plate and be heavier.Therefore, it needs considerable energy to move it.By make the hopper body with cloth, its weight reduces, and moves it and become easier.Therefore, it is preferably as recovery casting mold sand of the present invention locker room 10.
In addition, the sand on the hopper of being made by cloth adheres to minimizing.Therefore, be conducive to have high humility and have under the situation of tack storage reclaim casting mold sand reclaiming casting mold sand.In Fig. 4 and Fig. 5, hopper 15 is provided with conveyer belt below hopper body 17.Conveyer is used for by part recovery casting mold sand of ground transmission hopper and with its taking-up.Other mechanism can be used for transmitting and taking out sand as mechanism or the oscillatory type feeder unit that uses valve or gate.
When using automatic pouring machine 3, the actual weight of the motlten metal that the weight---about wherein one among the information Im of model---of the metal of being poured into a mould can be poured into a mould with the quilt that is poured in the mould replaces.By doing like this, the weight of the motlten metal that obtains from actual measurement and poured into a mould accurately can be " movement ".Thus, estimate in the casting mold sand that mulling is handled the loss of the additive that the heat by motlten metal causes and the temperature of sand exactly.Therefore, the water that to be added and the amount of additive have been optimized fast and reliably.
In addition, when about the information of puddle mixer 11 (amount of the water content of the recovery casting mold sand of mulling after handling, the temperature of sand, the sand that will handle through mulling etc.) when being transfused in the computer 5, can be by revising or revise for the information Isc that sand is classified about the information of puddle mixer 11 with about the content of the information Im of model.The optimum condition (pressure of the pressure of the casting mold sand that is used for dishing out and time, compression casting mold sand and time etc.) that estimate to be used for the moulding press 12 of the sand handled through mulling thus.Therefore, realize stable molded operation.
When about the information (thickness of the pressure of the pressure of the casting mold sand of dishing out and time, compression casting mold sand and time, mould etc.) of moulding press 12 when being transfused in the computer 5, can revise or revise for the information Isc that sand is classified about the information of moulding press 12 with about the information Im of model by using some.Can estimate the condition of the molded required sand of handling through mulling thus, and optimize the condition that is used for operation puddle mixer 11.If can obtain the thickness of mould and will be used to the characteristic (particularly, rammability) of molded sand, then can revise or revise for the information Isc that sand is classified by this information with about the information Im of model.Can estimate the optimum condition for the molded sand of handling through mulling thus.
Second embodiment
Next, another embodiment of the method that is used for preparation casting mold sand is described.In the method, have the different recovery casting mold sand for the information Isc that sand is classified and be stored in a plurality of recovery casting mold sand locker room.When sand being carried out mulling and handle, it is mixed with suitable amount to have different recovery casting mold sand that are used for information Isc that sand is classified.
Fig. 6 is the schematic diagram that the system that is used for preparation casting mold sand of embodiments of the present invention is shown and is used for molded production line.In Fig. 6, be used for the production line 21 of casting by being used for molded production line 22 (in some cases, can comprise automatic pouring machine 23) and forming for the production line 24 of preparing casting mold sand.The production line 21 that is used for casting by the computer system control of control all devices.The computer 25 that constitutes the part of computer system uses every batch of being used for the information Isc that sand is classified is identified through cooling to reclaim casting mold sand.Computer 5 comes estimated information Isc by using the information Im about model.
At the production line 24 that is used for preparing casting mold sand, shake out mould by the machine 26 that is used for the taking-up foundry goods.Transmit the recovery casting mold sand S for the information Isc that sand is classified of having at each mould by conveyer 27.Every batch is reclaimed casting mold sand and is collected among in a plurality of recovery casting mold sand locker room 28 one.
At the step place that is shaked out mould by the machine 26 that is used for the taking-up foundry goods, the information Isc " movement " that is used for sand is classified is as the intrinsic information of mould (" mobile data ").When in addition, can be after shaking out sand being sent to locker room 28, by the order of " mobile data " keep " mobile data " up to sand be sent to by conveyer 27 reclaim casting mold sand locker room 28 till.
Fig. 7 be illustrate with of the present invention that use for the system of preparing sand, about the figure of the example of the information Im of model.Not only comprise for the production to molded machine with production line about the information Im of model being optimized information with the type that is fit to product, and comprise the information that foundry goods is intrinsic.About the weight of the core sand in the sand that the information Im of model can comprise the weight of required number, the product of product or mould to be formed, the temperature of melt metal of being poured into a mould, the weight of the weight of the metal poured into a mould, core maybe will be blended in recovery, be used to form required time of the method for core, motlten metal in the cooling die, the material of product etc.In fact, some in the only selection information.The intrinsic information of foundry goods can comprise the position of the position in title, output, aperture of the method that is used to form core, product and number, cast gate and number etc.
The operation of said structure is described now.Fig. 8 is the flow chart for the method for preparing casting mold sand of the present invention.
At first, obtain for the information Isc that sand is classified by using the information Im about model, should be used for to the information Isc that sand is classified be for the composition of sand is classified about the information Ic of classification and be used to identify sand.Information Isc obtains about sand.Fig. 9 is the schematic diagram that is illustrated in the information Isc that being used for of using sand is classified for the system of preparing sand of the present invention.The sand that reclaims be based on amount to additive to be added, water to be added amount, sand carried out mulling handle that factor that time of spending etc. exerts an influence classifies.These factors can be the weight of core, by the weight of the motlten metal poured into a mould, the time of cooling molten metal etc.
For example, based on the weight about the weight of the core among the information Im of model and the motlten metal poured into a mould as shown in Figure 7, can classify to the composition of sand.Preferably, 3 to 10 classifications are arranged.Description has the example of 4 classifications.The information Isc that is used for sand is classified (Sc Sd) is transfused in the computer for Sa, Sb, should be used for to the information that sand is classified be used to obtain the information Ic about classification that closes with sand facies (A, B, C, D).For example, classification SA is the recovery casting mold sand that comprises much higher core sand content than the sand of other batch, classification SB is that the sand than other batch has the metal that greater weight poured into a mould and the sand that stands higher heat affecting, classification SC is that the sand than other batch has the metal that the quilt of lower weight pours into a mould and the sand that comprises less core sand, and classification SD is normal sand---namely, and the sand except first three classification.
Then, be used for the information Isc that sand is classified is used to reclaim casting mold sand at mould identification to be formed.By doing like this, for the recovery casting mold sand of the information Isc that sand is classified corresponding to mould.
Be to the data on the given computer 5 of each mould to be formed about the information Im of model.Its " movement " is to follow mould (" mobile data ").Therefore, being used for the information Isc that sand is classified is by using the information Im about model to be stored in computer, and is " movement ".When forming model, can be stored in the computer 25 about the information Im of model.
The recovery casting mold sand S with information Isc that collects and transmit by conveyer 27 (have certain composition sand SA, have sand SB and the SC of another kind of composition ...) being stored in a plurality of 28A of locker room for each batch recovery casting mold sand, conduct has the recovery casting mold sand of corresponding entry information Isc among 28B and the 28C.By way of parenthesis, because the embodiment among Fig. 6 only has three locker rooms, so can be stored in as the recovery casting mold sand SD of normal sand in the locker room of SA, SB with the most similar composition or SC.It is evident that the number that reclaims casting mold sand locker room can change in order to construct system of the present invention.
When sand being carried out the mulling processing, mix from a plurality of locker rooms, an amount of recovery casting mold sand with different information Isc.Mixing is from the sand through classification of a plurality of 28A of locker room, 28B and 28C.For this reason, send signal such as " SA is 10 units, and SB is 8 units, and SC is 6 units " and so on to mix the sand from a plurality of locker rooms by computer 25.
In addition, puddle mixer 31 is connected to conveyer 33, be used for the hopper 34 of additive and be used for watering the device 35 of water filling, and conveyer 33 is connected to for molded production line 22.Therefore, the recovery casting mold sand of optimised quantity and additive (as bentonite, extra large coal, slurry and fresh sand) and required water are mixed in puddle mixer 31.By this way, obtain uniform casting mold sand, that is, do not change.
Until the step that shakes out foundry goods by the machine 26 that be used for to take out foundry goods, be used for information Isc that sand is classified as the intrinsic data of each mould and " movement ".After shaking out the step of foundry goods until sand be transmitted device 27 be sent to reclaim casting mold sand locker room 28 till, can be shaking out foundry goods after for when sand being sent to locker room 28, keep information Isc according to the order of " mobile data ".
Yet when the device with the big holder such as cooling tank was installed in downstream for the machine that takes out foundry goods, sand may mix with the sand of previous or next mould.In this case, because the information that is " moved " until the step that shakes out foundry goods changes in this holder, so reduce about the accuracy of the information Ic of classification.
In this case, can be at the hopper 34B interpolation additive (such as bentonite) that passes through than stage morning (mixing before reclaiming casting mold sand) for additive.
When making conventional product continuously, the present invention is not subjected to the restriction of lot number.The present invention can be applied to such a case, wherein, only makes a collection of product.
As mentioned above, according to the present invention, from estimate to reclaim the composition of casting mold sand about the information Im of model.Therefore, by obtaining the information Isc that sand is classified of being used for about sand, can mix the many batches of recovery casting mold sand that have for the information Isc that sand is classified best.Therefore, provide uniform casting mold sand to being used for molded production line.
Can preferably include the weight of core about the information Im of model.By doing like this, can estimate to be blended in the amount that reclaims the core sand in the casting mold sand.Thus, can optimize the amount of water and additive.
In addition, can preferably include the weight of the motlten metal of being poured into a mould about the information Im of model.By doing like this, can estimate the loss of the additive that in the casting mold sand that mulling is handled, caused by heat and the temperature of sand.Thus, the water that to be added and the amount of additive have been optimized.
In addition, the information Im about model can preferably include the cooling used time of sand.By doing like this, can estimate in the casting mold sand that mulling is handled the loss of the additive that the heat by motlten metal causes and the temperature of sand.Thus, the water that to be added and the amount of additive have been optimized.
Can during the step of sand being carried out the mulling processing, based on the information Isc that is used for sand is classified, add additive and water from the hopper that is used for additive.By this method, can know the composition of sand, and the composition of sand is unknown when collecting sand with the method for routine.Thus, the water that to be added and the amount of additive have been optimized.
As shown in Figure 4, reclaiming casting mold sand locker room 28 can be the hopper of being made by cloth 15.The hopper of being made by cloth 15 shown in Fig. 4 and Fig. 5 comprises framework 16, hopper body 17 and conveyer belt 18, and framework 16 is box structures of shaped steel, and hopper body 17 is attached to framework 16, and conveyer belt 18 is arranged in below the hopper body 17 and is attached to framework 16.
Usually, this hopper be made by steel plate and be heavier.Therefore, it needs considerable energy to move it.By make the hopper body with cloth, its weight reduces, and moves it and become easier.Therefore, it is preferably as recovery casting mold sand of the present invention locker room 28.
In addition, the sand on the hopper of being made by cloth adheres to minimizing.Therefore, be conducive to have high humility and have under the situation of tack storage reclaim casting mold sand reclaiming casting mold sand.In Fig. 4 and Fig. 5, hopper 15 is provided with conveyer belt below hopper body 17.Conveyer is used for by part recovery casting mold sand of ground transmission hopper and with its taking-up.Other mechanism can be used for transmitting sand and taking out sand by part ground as mechanism or the oscillatory type feeder unit that uses valve or gate.
When using automatic pouring machine 23, the actual weight of the motlten metal that the weight---about wherein one among the information Im of model---of the metal of being poured into a mould can be poured into a mould with the quilt that is poured in the mould replaces.By doing like this, the weight of the motlten metal that obtains from actual measurement and poured into a mould accurately can be " movement ".Thus, estimate in the casting mold sand that mulling is handled the loss of the additive that the heat by motlten metal causes and the temperature of sand more accurately.Therefore, the water that to be added and the amount of additive have been optimized fast and reliably.
In the above-described embodiment, can concentrated area or non-concentrated area control computer 5,25.The recovery casting mold sand locker room of any amount can be set.Obtain the method that is not limited to embodiment for the method for the information Isc that sand is classified from the information Im about model.
Claims (8)
1. a method that is used for preparing casting mold sand wherein, reclaims sand at each mould after casting molten metal, and wherein, described sand is transported to for molded production line by the production line that is used for the described sand of preparation, and described method comprises the steps:
By using the information Im about model, obtain for the information Isc that sand is classified the described composition that comprises sand for the information Isc that sand is classified;
Use described next at every batch of recovery of each mould identification casting mold sand to be formed for the information Isc that sand is classified;
To be stored at the described described recovery casting mold sand for the information Isc that sand is classified of having of each mould and reclaim casting mold sand locker room; And
To take out from described recovery casting mold sand locker room at the described described recovery casting mold sand for the information Isc that sand is classified of having of each mould, handle described sand is carried out mulling.
2. as claimed in claim 1 for the method for preparing casting mold sand, wherein, described information Im about model comprises the weight of core.
3. as claimed in claim 2 for the method for preparing casting mold sand, wherein, described information Im about model comprises the weight of the motlten metal of being poured into a mould.
4. as claimed in claim 3 for the method for preparing casting mold sand, wherein, described information Im about model comprises and cooling off the shared time.
5. a method that is used for preparing casting mold sand wherein, reclaims sand at each mould after casting molten metal, and wherein, described sand is transported to for molded production line by the production line that is used for the described sand of preparation, and described method comprises the steps:
By using the information Im about model, obtain for the information Isc that sand is classified the described composition that comprises sand for the information Isc that sand is classified;
Use described next at every batch of recovery of each mould identification casting mold sand to be formed for the information Isc that sand is classified;
To be stored at the described described recovery casting mold sand for the information Isc that sand is classified of having of each mould and reclaim casting mold sand locker room; And
To have described described recovery casting mold sand for the information Isc that sand is classified and take out from described recovery casting mold sand locker room, handle described sand is carried out mulling.
6. a method that is used for preparing casting mold sand wherein, reclaims sand at each mould after casting molten metal, and wherein, described sand is transported to for molded production line by the production line that is used for the described sand of preparation, and described method comprises the steps:
By using the information Im about model, obtain for the information Isc that sand is classified the described composition that comprises sand for the information Isc that sand is classified;
Use described next at every batch of recovery of each mould identification casting mold sand to be formed for the information Isc that sand is classified;
To have described described recovery casting mold sand for the information Isc that sand is classified and be stored in a plurality of recovery casting mold sand locker room; And
Mixing from described a plurality of recovery casting mold sand locker room, have different described described recovery casting mold sand for the information Isc that sand is classified, handle described sand is carried out mulling.
7. as each the described method for preparation casting mold sand in the claim 1 to 6, wherein, described recovery casting mold sand locker room is the hopper of being made by cloth.
8. described for method of preparing casting mold sand as in the claim 1 to 6 each, wherein, when described sand being carried out mulling and handle, describedly add additive or water for the information Isc that sand is classified from additive hopper by using.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008308231A JP2009241149A (en) | 2008-02-26 | 2008-12-03 | Treatment method and treatment system of molding sand |
| JP2008-308231 | 2008-12-03 | ||
| PCT/JP2009/064897 WO2010064477A2 (en) | 2008-12-03 | 2009-08-20 | A process for preparing foundry sand and a system therefor |
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| Publication Number | Publication Date |
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| CN102143812A CN102143812A (en) | 2011-08-03 |
| CN102143812B true CN102143812B (en) | 2013-07-10 |
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| CN200980134747.3A Active CN102143812B (en) | 2008-12-03 | 2009-08-20 | A process for preparing foundry sand and a system therefor |
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| Country | Link |
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| JP (1) | JP2009241149A (en) |
| CN (1) | CN102143812B (en) |
| WO (1) | WO2010064477A2 (en) |
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| CN103894591A (en) * | 2014-04-18 | 2014-07-02 | 常熟市勤丰铸件厂 | Base of sand removing machine |
| BR112017026569A2 (en) * | 2015-06-11 | 2018-08-14 | Sintokogio, Ltd. | A regeneration method of molding sand, and reproduction equipment |
| US10906088B2 (en) * | 2015-08-14 | 2021-02-02 | Imerys Usa, Inc. | Compositions and methods for improving casting quality and mold sand additives |
| CN105458174A (en) * | 2016-01-21 | 2016-04-06 | 浙江卡博铜业有限公司 | Sand casting production line |
| CN108580872A (en) * | 2018-05-09 | 2018-09-28 | 福州荣益行智能科技有限公司 | A kind of special or delicate procedure training equipment of each section of operation of automation |
| KR102156716B1 (en) * | 2018-09-28 | 2020-09-16 | 주식회사 포스코 | Apparatus for casting and method for casting |
| CN110893374A (en) * | 2019-11-26 | 2020-03-20 | 成都市玄戈自动化控制技术有限公司 | Sand making system for mixing and screening raw materials and finished materials |
| JP7310686B2 (en) * | 2020-04-03 | 2023-07-19 | 新東工業株式会社 | Laser marking device, laser marking system and laser marking method |
| CN111983967B (en) * | 2020-08-17 | 2022-03-29 | 于彦奇 | Intelligent system and control method for controlling quality of molding sand in foundry |
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| NL8105887A (en) * | 1981-12-29 | 1983-07-18 | Linatex Nederland Bv | Crude sand is classified and fractions stored in separate silos - with outlets metered to mix predetermined grain size distribution |
| DE4010377A1 (en) * | 1990-03-30 | 1991-10-02 | Vnii Litejnogo Mash | Moulding sand recovery improving quality of sand - using thermal treatment and mechanical action to recycle sand with reduced energy consumption |
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| JPS589741A (en) * | 1981-07-07 | 1983-01-20 | Sintokogio Ltd | Treatment of molding sand |
| JP2541414B2 (en) * | 1991-12-21 | 1996-10-09 | いすゞ自動車株式会社 | Processing method for foundry sand |
| JPH11192532A (en) * | 1997-12-26 | 1999-07-21 | Sintokogio Ltd | Molding sand recovery device |
| JP2002103000A (en) * | 2000-09-29 | 2002-04-09 | Sintokogio Ltd | Treatment method for main mold green sand and device therefor |
| JP2001252745A (en) * | 2000-03-10 | 2001-09-18 | Sintokogio Ltd | Method for processing recovered sand |
| JP3480713B2 (en) * | 2000-05-09 | 2003-12-22 | 新東工業株式会社 | Molding related information monitoring system including sand properties |
| US6691765B2 (en) * | 2001-08-07 | 2004-02-17 | Noram Technology, Ltd. | Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock |
| KR20040009290A (en) * | 2002-07-23 | 2004-01-31 | 아이앤아이스틸 주식회사 | separation system of moulding sand |
| JP2005021944A (en) * | 2003-07-02 | 2005-01-27 | Nippon Airitsuhi Kk | Casting method and casting line |
| JP2006192486A (en) * | 2005-01-17 | 2006-07-27 | Sintokogio Ltd | Adjusting method and facility for adjusting recovered sand |
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- 2008-12-03 JP JP2008308231A patent/JP2009241149A/en active Pending
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- 2009-08-20 CN CN200980134747.3A patent/CN102143812B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8105887A (en) * | 1981-12-29 | 1983-07-18 | Linatex Nederland Bv | Crude sand is classified and fractions stored in separate silos - with outlets metered to mix predetermined grain size distribution |
| DE4010377A1 (en) * | 1990-03-30 | 1991-10-02 | Vnii Litejnogo Mash | Moulding sand recovery improving quality of sand - using thermal treatment and mechanical action to recycle sand with reduced energy consumption |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102143812A (en) | 2011-08-03 |
| WO2010064477A2 (en) | 2010-06-10 |
| WO2010064477A3 (en) | 2010-07-29 |
| JP2009241149A (en) | 2009-10-22 |
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