CN1315601C - Methods and apparatus for heat treatment and sand removal for castings - Google Patents
Methods and apparatus for heat treatment and sand removal for castings Download PDFInfo
- Publication number
- CN1315601C CN1315601C CNB2004100789682A CN200410078968A CN1315601C CN 1315601 C CN1315601 C CN 1315601C CN B2004100789682 A CNB2004100789682 A CN B2004100789682A CN 200410078968 A CN200410078968 A CN 200410078968A CN 1315601 C CN1315601 C CN 1315601C
- Authority
- CN
- China
- Prior art keywords
- foundry goods
- mould
- core
- nozzle
- heat treatment
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/003—Removing cores using heat
Abstract
A system and method for heat treating castings and removing sand cores therefrom. The castings are initially located in indexed positions with their x, y, and z coordinates known. The castings are passed through a heat treatment station typically having a series of nozzles mounted in preset positions corresponding to the known indexed positions of the castings passing through the heat treatment station. The nozzles apply heat to the castings for heat treating the castings and dislodging the sand cores for removal from the castings.
Description
The application is to be that January 24, application number in 2002 are 00810835.8, denomination of invention is divided an application for " heat treatment of foundry goods and desanding " application for a patent for invention the applying date.
The related application of quoting
The present invention requires to advocate the rights and interests in the 60/146th, No. 390 (submission on July 29th, 1999), the 60/150th, No. 901 (submission on August 26th, 1999) and the 60/202nd, No. 740 (submission on May 10th, 2000) U.S. Provisional Patent Application.
Technical field
The present invention relates to metallurgical casting technology, more properly relate to be used for the method and apparatus of removing core and this foundry goods being heat-treated from foundry goods.
Background technology
The conventional cast technology of forming metal foundry goods for example uses the surface with required foundry goods (for example cylinder head) to be molded over iron-sand box casting mold or sand mold (being commonly referred to mould) on the inner surface.A core that comprises sand and suitable bonding material and limit the foundry goods internal feature is arranged in the mould.Core is often used in metal casting inside and makes profile and internal feature, must remove and reclaim the core sand material after casting process finishes from foundry goods.According to application, if core and/or sand mold use binding agent can comprise aerodux, phenolic aldehyde polyurethane " ice chest " adhesive or other organic binding material that is fit to.In mould, fill up molten metal alloy subsequently.When alloy solidified, foundry goods can take out and deliver in the heat-treatment furnace and heat-treat, reclaim molding sand and timeliness usually from core from mould.Heat treatment and timeliness are to improve the technology of metal alloy so that make it have the physical characteristic that is suitable for various different application occasions.
According to some prior aries,, need carry out several visibly different steps usually in order metal casting to be heat-treated and from core, fully reclaim sharp sand in case form foundry goods.First step is to isolate the core part from foundry goods.Usually utilize one or compound mode from foundry goods, to isolate core.For example, can from foundry goods, dig out molding sand or can physical vibration or the vibrations foundry goods so that broken defeated and dispersed, thereby take out molding sand.In case from foundry goods, take out molding sand, usually can be to heat treating castings and timeliness in step subsequently.If wish to strengthen or hardening casting, usually to heat treating castings.The another one step comprises purification isolated molding sand from foundry goods.Usually utilize one or compound mode to carry out above-mentioned purification run.These can comprise that burning bag is coated in adhesive on the sand, grinds this molding sand and make molding sand partly pass through mesh screen.Therefore, the molding sand part can be carried out recycling step again, until the molding sand that is recovered to abundant purification.
Therefore, therefore the method that industrial needs improve the heat treatment foundry goods and therefrom reclaim core material requires to obtain more effectively to heat-treat, remove core and the effective ways and the relevant apparatus of the sand that recovery fully purifies from core for a long time.
Summary of the invention
In brief, the present invention includes a kind of system and method that is used for heat treatment foundry goods (for example using) and removes following core at casting process at metallurgical works.The present invention have a plurality of utilize high-pressure fluid medium effectively to remove down and reclaim the core molding sand and in mould to heat treating castings
Embodiment.
Be used for removing the embodiment of molding sand and heat treatment foundry goods down at one of the present invention, motlten metal is poured into a mould in the progressive die tool, this mould usually will be through preheating so that metal temperature can be remained on heat treatment temperature when forming foundry goods.From mould, take out foundry goods subsequently, and each foundry goods is placed in the precalculated position on the saddleback with known x, y, z axle and coordinate.Each saddleback is configured usually and can admits a foundry goods in a constant bearing with X, Y, Z axle and coordinate or position, and foundry goods is arranged on a known calibration position, utilizes the core hole of the foundry goods of core formation just to locate or be aligned in described known calibration position like this.Above-mentioned saddleback can also comprise keeper, and guiding also helps foundry goods to maintain required known calibration position.
Each saddleback band heat-treatment furnace or the thermal chamber that a foundry goods that is positioned at its inside passes a heat treatment platform, heat-treats with desanding and also may reclaim core.Through the heat treatment of Overheating Treatment platform the time, a series of x of having, y, z coordinate are fixed or are positioned to nozzle with above-mentioned foundry goods aligned in position with the hot high pressure flow of fluid medium, and for example air, water or heat conduction wet goods are directed on the foundry goods and are inner.This fluid is easy to and helps when heat treatment to remove from the core cavity body behind the broken core and the core molding sand is removed in promotion.Usually, nozzle is disposed in order and passes on the nozzle platform of thermal chamber location, and the nozzle on each nozzle platform is set at the preset bearing of the known location in relative foundry goods core hole, and each nozzle combination can be carried out Long-distance Control by a control system or console.
In another embodiment of the present invention, foundry goods can be retained in its mould and carry out " heat treatment in the mould ".These moulds will carry out preheating usually to hold it in the heat treatment temperature near foundry goods before pouring fusion foundry goods metal into, handle so that in mould foundry goods is carried out portion of hot when foundry goods is partly solidified.Then, mould is communicated with foundry goods in it and is placed usually or is positioned at the demarcation orientation, or the position of known x, y, z coordinate, so that core is heat-treated and removed to the foundry goods in it.
In order to heat-treat and remove and reclaim the core of foundry goods, mould and foundry goods usually will be through the heat-treatment furnaces of Overheating Treatment platform.This heat treatment platform also comprises the plurality of nozzles platform, and each nozzle platform has a series of nozzles that position and be provided with corresponding to mould and foundry goods known location in a predefined manner, with convenient it is used the design high-pressure fluid.The nozzle platform equally also comprises and can and can enter the nozzle of various application site along a mould predefined paths on every side by the automaton operation, wherein these application site are corresponding with the position or the orientation of die inlet or opening, conveniently enter foundry goods so that therefrom remove core.Alternately, the heat treatment platform can comprise for example substituting thermal source such as inductance or radiation energy or oxygen room equally, is used to mould or casting mold integral body that the energy is provided and so that heat up the foundry goods in it is heat-treated.Subsequently, from mould, take out foundry goods, and make this foundry goods remove platform or remove step, so that further from foundry goods, remove and reclaim possibly core through follow-up core by follow-up core.
In another embodiment, mould is preheating to a predetermined temperature.Subsequently, when pouring into motlten metal in the mould, continue mould is heated, from mould, do not remove foundry goods so that when foundry goods solidifies, it is heat-treated.This mould can be transmitted the quenching platform subsequently, so that foundry goods is quenched and therefrom removes core.In this embodiment, mould remains near a known fixed position or an orientation that is positioned at pouring platform place or its usually.Application from a series of be arranged in around the mould and usually and the hot-fluid that ejects the nozzle that aligns of die inlet to mold heated.Said nozzle further moves between a series of nozzle locations that set according to die location or orientation around mould subsequently, so that heating mould is heat-treated the foundry goods in it.
Also can more clearly understand various purpose of the present invention, feature and advantage in conjunction with the accompanying drawings by this specification of reading comprehension.
Description of drawings
Fig. 1 is the schematic diagram of first embodiment of the invention;
Fig. 2 illustrates the side view of motlten metal being introduced mould;
Fig. 3 is the perspective view that foundry goods position in the saddle is shown;
Fig. 4 illustrates the schematic diagram that is used to carry out heat treatment in the mould and removes another embodiment of the present invention of sand mold;
Fig. 5 A-5B moves to various application site around mould and carries out heat treated side view in the mould for air nozzle is shown;
Fig. 6 is schematically illustrated to carry out another of heat treated thermal chamber in the mould to foundry goods
The side view of embodiment;
Fig. 7 is schematically illustrated to carry out another of heat treated thermal chamber in the mould to foundry goods
The side view of embodiment;
The schematically illustrated side view that foundry goods is carried out other embodiment of heat treated thermal chamber in the mould of Fig. 8 A-8B.
The specific embodiment
Describe view now in detail, wherein identical label is represented identical parts in all views.Fig. 1 roughly illustrates metallurgical casting technology 10.Because casting technique belongs to prior art, so in the traditional casting technique of this only concise and to the point description, so that reference.
As depicted in figs. 1 and 2, according to the present invention, topple over platform or casting platform 12 is toppled over motlten metal or metal alloy M in the progressive die tool 11 at one, so that form a foundry goods 13 as cylinder head or automobile engine cylinder.Usually, core is admitted or is placed to and can be formed cavity and/or thin portion of foundry goods or core print (core print) in the inside of the foundry goods in each mould.Each mould 11 is generally sandbox pattern tool and can be made by metal such as a kind of cast iron or other material of the prior art, can have the clam shell shaped design and therefrom open and take out foundry goods with convenient.This mould also can be by being mixed with for example made greensand mold mould of molding sand material of binding agent such as phenolic resins or other existing suitable organic binder bond.Similarly, the foundry goods core generally includes core, and it is formed by a kind of sand material and for example suitable binder such as phenolic resins, phenolic aldehyde polyurethane " ice chest " binding agent or other suitable existing organic binder material.
As shown in Figure 3, each mould 11 generally includes a series of sidewall 14, roof or upper wall 16 and diapire or bottom 17, limits an inner chamber 18 of admitting motlten metal M thus.This inner chamber 18 is formed with the relief pattern that is used to form foundry goods 13 internal features in the mould usually, so that limit the shape or the profile of final casting.Cast gate 19 is formed on usually on upper wall or the top 16 and with inner chamber 18 and is communicated with, and maybe this motlten metal is introduced mould so that topple over motlten metal M as depicted in figs. 1 and 2.Final foundry goods has the feature of dies cavity, and core opening or import 21 also are molded over the position location place of core in mould in addition.
Equally also topple over platform 12 through being everlasting near a heating element heater is set, for example hot blast is advertised machine or other suitable gas or electric furnace heating arrangements 22, so that preheated mold 11.Can be that this mould can be provided with the thermal source or the element of heating mould for what substitute.For example, mould can comprise the chamber of the heat mediums such as for example deep fat that are used to admit heating mould near foundry goods.Usually, according to the metal or alloy that forms foundry goods, with mould be preheating to one temperature required.For example, for aluminium, mould need be preheating in about 400-600 degree centigrade the scope.The required various preheat temperatures of the various metal alloys of preheating are familiar with by those skilled in the art, and can comprise 400-600 degree centigrade up and down than large-temperature range.Preheated mold helps that the foundry goods metal remained on the heat treatment temperature place or near this temperature, so that toppling over motlten metal and motlten metal when in mould, solidifying and make further minimum heat losses, subsequently mould is sent to the subsequent treatment platform, foundry goods is heat-treated.
As shown in Figure 1, in case motlten metal or metal alloy have been poured mould and partly solidified at least into, a mould conveying mechanism 25 can take off mould and foundry goods from toppling on the platform 12, and is sent to a loading bench 26.This mould conveying mechanism comprises the automaton (not shown) of a delivery mold, and the existing conveying mechanism of capstan winch or other type is used for mould is sent to loading bench from toppling over platform.In the first embodiment of the present invention, motlten metal M is solidified to form foundry goods in mould after, for example utilize robots arm or similar means place from mould 11, to take out foundry goods 13 (Fig. 3) at loading bench 26 (Fig. 1), and this foundry goods is placed on of saddleback 27 inside has in the predetermined calibration position of known x, y, z coordinate.As a result, the core hole 21 (Fig. 3) of foundry goods is similarly located or is aligned in the known location, so that remove core from foundry goods.
As shown in Figure 3, each saddleback is one basket or shelf normally, this saddleback is made by metal material usually and is had a base portion 28 and a series of sidewall 29, limits an opening casting chamber or container 31 thus, and foundry goods 13 is admitted in core hole or import that this container utilization exposes.This foundry goods will be fixed in known demarcation or alignment orientation or the position in the container 31 that is placed on its saddleback 27 time usually.In addition, as shown in Figure 3, saddleback 27 can also comprise the keeper 32 that is installed on each saddleback base portion and/or wall 28 and 29, is used for foundry goods guiding and maintains required calibration position in the saddleback 27.This keeper comprises the pilot pin 33 as Fig. 3, perhaps can comprise recess or groove shown in dotted line among Fig. 3 34, perhaps other be used for foundry goods guiding be positioned at required calibration position or orientation in similar device.Usually, pilot pin 33 is made by for example cast iron or similar resistant to elevated temperatures metal material, and is installed on the bottom or arbitrary sidewall of saddleback.In casting process, for example be installed in the bottom of saddleback or the pilot pin on the sidewall, or, in foundry goods, form corresponding locator or guide openings 36 (shown in dotted line) by using degradable core material by use.In the time of in foundry goods is placed on its saddleback, pilot pin will be received within the corresponding guide openings of foundry goods, so that with foundry goods location with maintain in the required calibration position with the known and x, the y that limit, z coordinate, and similarly the position of core import in the foundry goods is located or is aligned in the known location, so that more effective foundry goods core that more directly heats, thereby promote that taking off and remove core sand reclaims.
In addition, in some applications, mould can comprise a steel or iron " mould " (chill) or core (insert), and described metal " mould " or core have the various design features that are distributed in order to improve its grainiess on the foundry goods.These metal patterns can take out after cast, perhaps can stay and become when the foundry goods motlten metal solidifies the part of foundry goods.To also can be used as keeper if this metal pattern is stayed in the foundry goods, and foundry goods is positioned in its saddleback interior required alignment or position.Equally also can be by taking out left feature of metal pattern or thin portion as the anchor point of pilot pin or other keeper in the joint saddleback, so that each foundry goods is fixed in its required calibration position.
As shown in Figure 1, after each foundry goods 11 has been loaded in the position or orientation that has known x, y, z coordinate in its saddleback, each foundry goods will enter a heat treatment platform 40 subsequently and heat-treat in saddleback, remove core and reclaim core sand (if desired).This saddleback passes the heat treatment platform usually and transmits on a conveyer belt or track, foundry goods will be maintained at known calibration position when passing the heat treatment platform like this.Heat treatment platform 40 generally includes a heat-treatment furnace, and this heat-treatment furnace is generally a gaseous fuel heating furnace and has a series of processing sections or process chamber, is used for each foundry goods is heat-treated and removed core and reclaims core sand.Wherein when each application may need to heat-treat and take out core and handle section and can be divided into much more as far as possible or the least possible section, and each foundry goods is maintained at mould inside usually and can be with it to pass a heat treatment platform until a saddleback.If desired, also may make the foundry goods timeliness in heat treatment platform 40 inside.
In United States Patent (USP) the 5th, 294,094; 5,565,046 and 5,738, some following heat-treatment furnaces are disclosed in No. 162, promptly these heat-treatment furnaces can be heat-treated and take out core from foundry goods foundry goods, and reclaim core sand possibly from the foundry goods core, and this paper is with reference to these publications.Disclosed another heat-treatment furnace can heat-treat and remove core and reclaim core sand metal casting in No. the 09/313rd, 111, the U.S. Patent application of on May 17th, 1999 application, and this paper equally also will be with reference to the disclosure thing.
As shown in Figure 1, heat treatment platform 40 comprises series of spray nozzles platform 41, this nozzle platform along this heat treatment interstation every placement positioning, so that promote heat treatment operation and from foundry goods, remove core.The nozzle platform number of placing along the heat treatment platform can change according to the core print or the design of foundry goods.In the corresponding known or aligned position in the known calibration position of the interior foundry goods of saddleback that each nozzle platform or assembly 41 included series of spray nozzles 42 are installed and are positioned at and just therefrom pass.Number of nozzle in each nozzle platform can change according to the core print of foundry goods, and the dissimilar foundry goods that have different core designs so just can be used the nozzle of arbitrarily different settings or quantity at each nozzle platform.Usually control nozzle by the control system of an energy Long-distance Control, so that can engage or throw off each nozzle that is positioned at different spray nozzles platform place according to the design of foundry goods of passing the heat treatment platform or core print.
Each nozzle 42 is installed in a precalculated position and/or orientation usually, and according to the known calibration position of saddleback medium casting form with core hole or import or core print in one or align with one group of core hole in mould.The hot high pressure circulation of supplying for each nozzle often comprises air, deep fat, salt, water or other known fluid, and usually near 1,000FPM is introduced to the core opening part to about 15 under the high pressure of 000FPM, although also can be according to the higher or lower pressure of specific foundry goods situation employing.Be applied to pressure fluid on the foundry goods by nozzle and tend to impact or touch core in the foundry goods, so that the binding material that makes core is to small part cracking or fragmentation.When core by fluid breakup or when dispersing, the core sand of core can tend to utilize fluid to reclaim the passage of core sand by foundry goods and be removed from foundry goods or clear up by core hole or import.
The nozzle 42 of each nozzle assembly or nozzle platform 41 can also be adjusted to different nozzle locations according to the feature of foundry goods, and the pressure of same fluid also can be conditioned.For example by using the nozzle that can move automatically or locate to realize the remote adjustment nozzle.Equally also can have different temperature according to the section in the heat treatment platform at the nozzle place of dispersing fluid from the fluid of nozzle, like this fluid will be not can the negative influence foundry goods by heat treatment that heat-treatment furnace or platform carried out.In addition, the nozzle of each nozzle platform can move between each position, comprise from a resting position and move to an application site, perhaps between the several application position, move, and can be towards core hole or import when each different zone or platform in case foundry goods moves to the heat treatment platform, cause that core is broken and from foundry goods, remove and be used for core is removed so that there is strategy ground that the flow of high-pressure fluid of heat is guided to different core apertures or import.Like this, in heat-treatment furnace or platform, use the nozzle platform can improve and make more effectively when the heat treatment foundry goods, and help the sand material is retrieved to reuse from core core broken and removal from each foundry goods.
As shown in Figure 1, after each foundry goods was finished heat treatment and removed core, quenching platform 45 is removed and moved on to usually to each foundry goods from heat treatment platform 40.Quenching platform 45 generally includes one and is filled with the quenching tank that can immerse the cooling fluid that wherein cools off and quench as water or other known foundry goods.The function of the specific heat of normally formed foundry goods of the volume of quenching tank and size and metal or metal alloy, specific heat comprise foundry goods and the heated temperature of each foundry goods.Alternative, the quenching platform can comprise a series of air nozzles, is used for the air of cooling is ejected into the foundry goods of quenching.
An alternative embodiment of the invention has illustrated that shown in Fig. 4-8B, foundry goods is heat treatment in mould.As shown in Figure 4, in the embodiment of casting process 50, on cast or casting platform 52, motlten metal or alloy M are injected in the mould 51.Shown in Fig. 4-5B, mould 51 in this embodiment generally includes the sandbox pattern tool of making by as cast iron or similar material, it perhaps can be the greensand mold mould that the known in the prior art sand material that is mixed with organic bond is made, and generally include an interior chamber, form foundry goods 53 (Fig. 6-8B) within it.
Each mould generally includes a core 54, and as shown in Figure 7, core is formed by the sand material that is mixed with organic binder bond usually, form in the foundry goods that is used in mould, forming the hole and or core hole or import, and be used to form foundry goods details or core pattern.Mould 51 in this embodiment, also comprise port or die entrance 56 (Fig. 4-5B), its can be around the mould optional, desired position or the local sidewall 57 that forms and extend through mould 51, (foundry goods 53 that forms in Fig. 6-8B) provides access, and comes directly heat to be applied to foundry goods in the mould and core is broken and remove so that for mould.
For example the heating element heater of hot-air blower or other suitable gas or electrical heating mechanism 58 (Fig. 4) is arranged near pouring platform or the casting platform 52, with energy preheated mold when guiding to motlten metal M in the mould.Alternately the place at mould foundry goods place in contiguous mould can be formed with cavity, wherein, can hold the gas of heating, and deep fat or other heat medium are used for preheated mold and the further foundry goods in the heating mould.Normally, according to the heat treatment temperature of the required formation foundry goods of metal or alloy, the temperature that mould and die preheating to is required is for just 400-600 degree centigrade in aluminium.Mould and die preheating is tended to: when pouring platform is sent out mould substantially with mould in the temperature of the foundry goods that forms remain on the heat treating castings temperature or near and make its further minimum heat losses; When solidifying, foundry goods at least in part foundry goods is heat-treated; Thereby and, foundry goods strengthens heat treatment to foundry goods by reducing heat treatment time because need not significantly to be reheated the required temperature levels of heat treatment.
After this, each mould 51 will be in case will be sent to loading bench 61 from casting platform or pouring platform 52 by a mould conveying mechanism 59 after having loaded melted material M.This mould conveying mechanism 59 generally includes one and is used for mould is carried the existing conveying mechanism of automaton, capstan winch, conveyer belt or other type from the mould of toppling over platform and being sent to loading bench.This conveying mechanism is positioned at each mould in the known predetermined calibration position at loading bench place, and the x of this mould, y, z coordinate were in before heat treatment in known orientation or the location.
In a most preferred embodiment of the present invention, above-mentioned mould is understood shift-in subsequently usually and is passed heat treatment platform 62, so that at least in part foundry goods is heat-treated and broken and remove core down.As mentioned above, heat treatment platform 62 generally includes a heat-treatment furnace that is generally the gaseous fuel heating furnace, and this heat-treatment furnace has a series of processing section or process chamber, is used for heating mould so that at least in part the foundry goods of " in the mould " is heat-treated.The number of wherein handling section or process chamber can be divided into many as far as possible or the least possible section according to handled foundry goods in each is used.In addition, in mould foundry goods is proceeded to after the heat treatment of small part, this foundry goods can be removed and pass a heat treatment platform from its mould, so that continue heat treatment, remove core and reclaim core sand possibly.
In United States Patent (USP) the 5th, 294,994; 5,565,046 and 5,738, a kind of following heat-treatment furnace is disclosed in No. 162, when promptly this heat-treatment furnace can remain on " in the mould " at this foundry goods to foundry goods heat-treat, in this foundry goods partial crushing and/or take out core at least, perhaps continue heat treatment, remove core and reclaim core sand possibly.This paper will be with reference in conjunction with these publications.Disclose the another kind of heat-treatment furnace that uses with the present invention in No. the 09/313rd, 111, the U.S. Patent application of on May 17th, 1999 application, this paper equally also will be with reference to quoting the disclosure thing.These are handled stoves and can both be when foundry goods still is retained in the foundry goods reclaim core sand the heat treating castings process from the core of the foundry goods that takes off by die inlet.
Shown in Fig. 4-5B, heat treatment platform 62 also generally includes a succession of nozzle platform 63 or assembly that all is equipped with plurality of nozzles 64.The nozzle of each nozzle platform be positioned at usually a known precalculated position and/or with mould 51 on the orientation that aligns of known location of a few or some group imports 56.The number of the number of nozzle platform and each nozzle platform top nozzle can change as required, so that with variable degree and/or quantity to mold heated, thereby the foundry goods in it is heat-treated, thereby and realize that control is to mould with to the heating of foundry goods and adjust heating to the different phase of heat treating castings.
Each nozzle is all supplied a kind of heating fluid stream or air-flow usually, and shown in Fig. 5 A and 5B, this hot-fluid is directed on the mould, normally is directed into a particular mold import or one group of die inlet place of each mould.This fluid media (medium) that is applied on the nozzle generally includes water, air, deep fat, salt or other known fluid, these fluids are high pressure and the different temperatures that is in heating mould, at foundry goods during, be controlled so as to consistent with the different heat treatment stage by the temperature of the hot-fluid that pin applied through the different spray nozzles platform of Overheating Treatment platform.Guide the progressive die tool also to impel the binding agent of foundry goods core to break easily usually hot-fluid by die inlet; so that when heat treatment, make core to small part decompose and from foundry goods, remove and/or take out, and the core sand material of removing can the flow through molds import when discharging fluid.In addition, this mould also may be opened through the nozzle platform time simultaneously at least in part, so that hot-fluid is applied on foundry goods and the core hole, thereby heat-treats and remove core.
Except making foundry goods through the series of spray nozzles platform, described nozzle platform comprise be installed in align with the mould known location or corresponding fixed position on and align with the die inlet known location thus, also mould may be maintained a nozzle platform or on a fixed cast position at pouring platform place, so that apply hot-fluid.In such an embodiment, nozzle 64 ' (Fig. 5 A and 5B) can be operated by automaton usually, thereby can move between a series of predetermined fluid application or nozzle location shown in arrow 66 and 67 among Fig. 5 A and the 5B.When nozzle 64 ' moves around mould with arrow 66 and 67 directions, they are applied to a high pressure hot-fluid F on the mould, usually be directed to and import 56, so as the temperature of mould to be improved and the temperature of enough metal casting being heat-treated when maintaining the foundry goods motlten metal and solidifying in.In case on pouring platform or the mould conveying mechanism with mould location or when being placed on the loading bench, the various application of movable nozzle or nozzle location are usually according to mould and be determined or set according to known x, y and the z coordinate of its import thus.
In the alternate embodiment of the heat treatment platform shown in Fig. 6-8B, the nozzle platform can be replenished by additional thermal chamber or be alternative, is supplied or is directed in this thermal chamber self-energy to raise on the mould and mold temperature is maintained the required temperature of heat treating castings.In first embodiment of thermal chamber 70, as shown in Figure 6, mould or sand mold 51 are placed on a conveyer belt or the conveying mechanism 71 usually, so that heating clamber 70 is passed in motion shown in arrow 72.This heating clamber 70 normally elongated furnace chamber with insulative base, side and top also comprises a radiation energy 73 as shown in Figure 6.This radiation energy is installed in the top of heating clamber 70 usually, but those skilled in the art person it will be appreciated that also they move when passing heating clamber 70 on conveyer belt or conveying mechanism, this radiation energy also can be installed in the side, also can use a plurality of radiation energies to be installed in mould side wall, top and/or below.Usually, radiation energy is the radiation energy of infrared emitter or other type.
This radiation energy usually will about 400-650 degree centigrade radiant heat be directed on the mould that passes heating clamber, normally shown in arrow 74, be directed to the side and/or the top of each mould.This mould is accepted one required period of radiation energy with its foundry goods thus, and this time decides according to the metal of heat treatment foundry goods.This emittance is absorbed by mould usually, thereby correspondingly improves the temperature of mould, so that outside internally heating mould and foundry goods thereof.
Fig. 7 is illustrated in another alternate embodiment of the employed heating clamber 80 of heat treatment in the mould of the present invention.Shown in 7, this heating clamber 80 normally one have the elongated stove of insulative base, top and side and comprise that one is used to make mould and foundry goods thereof to pass conveyer belt or other conveying mechanism 84 of this heating clamber 80 with arrow 82 directions.This heating clamber 80 also comprises an induction energy 83 that mould or casting mold is applied thus inductive energy to the core 53 and 54 of foundry goods and Qi Nei.This induction energy can comprise conductive coil, microwave energy or other the known induction energy or generator usually, and is identical with radiation energy among Fig. 6, and this induction energy can be placed on the top of mould top heating clamber 80 along the heating clamber both sides, perhaps is placed on both sides.This induction energy can produce high energy magnetic wave field shown in arrow 84, this magnetic wave field is directed into mould 51 tops and/or both sides and has one or more preset frequencies that can be absorbed by core 54, so that rising core and casting temperature and come correspondingly the foundry goods in the mould to be heat-treated by from inside to outside heating foundry goods and mould.
Fig. 8 A and 8B illustrate in the present invention another alternate embodiment of the heating clamber 90 that uses, thereby are applied to foundry goods on the mould and improve its temperature by the energy is applied to, so that foundry goods is realized " in the mould " heat treatment.In this embodiment, mould generally includes sand mold and fills mould (sand mold pack type dies), can certainly be sandbox pattern tool (flask typemolds).Shown in Fig. 8 A and 8B, the normally elongated heating clamber of heating clamber comprises being used for conveyer belt or conveying mechanism 91 that the mould 51 of interior dress foundry goods 53 is carried along the direction of arrow 92.When mould and foundry goods moved through heating clamber 90, they passed low flow velocity oxygen chamber 93.The oxygen chamber generally includes high pressure upstream side 94 and low pressure downstream side 96, and these both sides are toward each other to help the oxygen flow through molds.As described in arrow 97 (Fig. 8 A) and arrow 97 ' (Fig. 8 B), when described mould passed the low flow velocity oxygen chamber of heating clamber 90, the oxygen of heating was introduced to and passes described mould or fills mould.When described oxygen flow through molds or fill mould from the high pressure side of oxygen chamber take out to or when flowing to the low-pressure side, the binding agent burning of part of oxygen and mould filler and core, thus promote the burning of the interior binding material of heating clamber.As a result, mould filler and its foundry goods further are provided binding material and improve the energy that burning is provided, thereby improve the temperature of the foundry goods in the mould filler, and the binding agent of broken mould filler and core are to be easy to remove and reclaim core simultaneously.As described in Fig. 8 A and 8B, according to the size and the structure of heating clamber, the oxygen chamber of low flow velocity can be orientated to vertical direction (as Fig. 8 A) or horizontal direction (as Fig. 8 B), is used to force hot oxygen by the mould filler.
In addition, also can improve the temperature of mould or sand mo(u)ld filler and come foundry goods in the mould is heat-treated, be reduced in motlten metal simultaneously, the potential heat transmission loss between die surface and the air by being provided with the energy in the inside of mould own.In a such embodiment, mould is formed with chamber or chamber near near the inner chamber that forms foundry goods.For example deep fat, water or other the hot fluid medium that adds that can keep heat are fed into the mould structure that is contained in these chambers.These add hot fluid and tend to increase and help the temperature of foundry goods to remain on the needed desirable level of heat treatment.
As the result who energy is applied to mould or mould filler itself, mould is heated to desirable temperature, and remains on temperature required to the heat treating castings that forms in it when the motlten metal of foundry goods solidifies.After just being injected into motlten metal in the mould, the foundry goods metal is enhanced temperature usually and is stabilized in the heat treatment temperature place, such foundry goods was cut to alap about 50 minutes the process time that heat treatment can be required with the heat treatment foundry goods significantly in mould from 250 minutes, thereby the heat treatment of foundry goods can be carried out in the very short a period of time after motlten metal is injected into mould.If you are using, the heat treatment temperature that mold temperature is brought up to the heat treatment foundry goods also improved core and or sand mo(u)ld break and with the burning of its incendivity binding agent so that further reduce required time of sand mold in heat treatment and removal and recovery core and the casting process.
After the heat treatment, the heat treatment that other warm table is finished foundry goods is as required removed and moved to foundry goods to foundry goods in the mould usually from mould in heat treatment platform 62, and remove core and possibly with the sand material recovery of core.Foundry goods moves to quenching platform 100 then and quenches and cool off foundry goods.Alternately, as shown in Figure 4, foundry goods shifts out and directly is sent to the quenching platform from mould.Quenching platform 100 generally includes a quenching tank that is filled with cooling fluid (as water or other cooling material), but should also have a series of nozzles as 101 indications among Fig. 4 by the quenching platform, is used for cooling fluid (as air or water) is applied to foundry goods.In near the contiguous auxiliary quenching apparatus of pouring platform, also can quench, thereby circulation timei and thermal change can be minimized, set and handle the molten metal material in the mould.
After the heat treatment of finishing foundry goods and removing core, foundry goods can be removed from mould, then in the quenching tank of dip quench platform so that at further first being processed cooling foundry goods, and from foundry goods, remove shakeout and reclaim for future use.In addition, shown in the dotted line of Fig. 4, also mould directly can be sent to the quenching platform from pouring platform.For example, will be from the mold heated of pouring platform to being near the heat treatment temperature of coming the heat treatment foundry goods pouring platform, mould can directly be sent to the quenching platform.
Correspondingly, in a single day the present invention has reduced or eliminated the needs of further heat treatment foundry goods when removing foundry goods from mould, this foundry goods will be heated to be provided solid solution heat time heating time (solutionheating time) and coldly gives as security quenching effect in the mould that provides essential, so that reduce the quantity of the heat treatment/process time that forms metal casting significantly.The present invention is also by guiding fluid stream into be in the precalculated position foundry goods, and this precalculated position is corresponding in the known orientation or the position of mould foundry goods and mould thereof when passing the heat treatment platform,
It should be appreciated by those skilled in the art and above-mentionedly the present invention has been discussed, in not exceeding the described spirit and scope of following claim, can make various distortion, improve and change with reference to accompanying drawing.
Claims (21)
1. method of processing the foundry goods of known metal comprises:
Motlten metal is toppled in the progressive die tool;
Metal remained on reach sufficiently long a period of time in the mould,, thereby form the foundry goods that has core and core opening within it with curing metal at least in part;
Foundry goods is placed on calibration position, and the X of foundry goods, Y, Z axle are oriented in the known orientation, make on the known location that the orientation of several core openings is in several nozzles align at least;
Fluid stream is guided in core opening part and the opening from nozzle, from foundry goods, to remove core; With
Several nozzles are moved to first nozzle location that aligns with several openings that enter core at least; With
At least a portion in several nozzles is moved to second nozzle location, and wherein, this part and the core opening of several nozzles align.
2. method of processing the foundry goods of known metal comprises:
Motlten metal is toppled in the progressive die tool;
Metal remains on and reaches sufficiently long a period of time in the mould, with curing metal at least in part, thereby forms the foundry goods that has core and core opening within it;
Foundry goods is transferred to a saddleback from mould;
Foundry goods is placed on calibration position in the saddleback, and the X of foundry goods, Y, Z axial coordinate are known, make on the known location that the orientation of several core openings is in several nozzles align at least;
Fluid stream is guided in core opening part and the opening from nozzle, from foundry goods, to remove core.
3. system that produces foundry goods by motlten metal comprises:
A series of moulds admit motlten metal to limit and to form foundry goods within it;
A series of saddlebacks, it is suitable for holding foundry goods, and described foundry goods is in the required orientation with known calibration coordinate; With
One heat treatment platform accommodates saddleback within it, and described saddleback has the foundry goods that is positioned at its known calibration position, is used for the heat treatment foundry goods and removes core, it is characterized in that described heat treatment platform comprises:
Several nozzle platforms, each nozzle platform is provided with several nozzles, and the known calibration position that nozzle is positioned to foundry goods aligns, and is used for fluid stream is applied on the foundry goods to remove core from foundry goods basically.
4. system as claimed in claim 3, it is characterized in that, described each nozzle platform comprises the nozzle of a series of automatic controls, this nozzle is suitable for moving around foundry goods between at least the first nozzle location and second nozzle location, is used for fluid stream is guided on the foundry goods from different directions to remove and to remove core from foundry goods basically.
5. system as claimed in claim 3, it is characterized in that, each described saddleback comprises that the wall of a series of qualification foundry goods cavity volumes and several are positioned at the keeper of described foundry goods cavity volume, so that joint and guide described foundry goods to enter its known calibration position with known location coordinate at described saddleback.
6. system as claimed in claim 5, it is characterized in that described keeper comprises pilot pin, described foundry goods forms in described mould, described mould has corresponding locating aperture, holds its known calibration position that described pilot pin is used for foundry goods is positioned at described saddleback in this opening.
7. system as claimed in claim 3 is characterized in that, described mould comprises sandbox type casting mold, its have one be used for the described mould of preheating and at least portion of hot handle the heating source of described foundry goods.
8. system as claimed in claim 3 is characterized in that, also comprises the quenching platform of the described foundry goods that is used to quench.
9. system that is used to make metal casting comprises:
A mould accommodates metal material within it to form foundry goods;
The heat treatment platform, the mould that wherein has foundry goods moves in the known calibration position so that the heat treatment foundry goods by this heat treatment platform;
The heat treatment platform comprises a thermal chamber, and the heat of accepting to apply at described indoor described mould is so that the foundry goods in the described mould of small part heat treatment; With
It is characterized in that described heat treatment platform comprises that one is used for described mold heated is handled the device of the temperature of foundry goods in it to being enough to portion of hot at least.
10. system as claimed in claim 9, it is characterized in that, described heater comprises at least one nozzle platform, this nozzle platform is along the setting of described heat treatment platform and have at least one original nozzle that aligns with a series of die inlet that is mounted to, described die inlet is formed in the described mould, described nozzle is used for fluid media (medium) is applied to described mould, to heat the core material of core in described mould and the described foundry goods of removal.
11. system as claimed in claim 9, it is characterized in that, also comprise at least one nozzle platform, this nozzle platform is along the setting of described heat treatment platform and have at least one original nozzle that aligns with a series of die inlet that is mounted to, described die inlet is formed in the described mould, and described nozzle is used for fluid media (medium) is applied on the described mould to remove the core material of core in the described foundry goods.
12. system as claimed in claim 9 is characterized in that, described heater comprises a radiant energy source that is installed in the described heating clamber, so that emittance is guided on the described mould.
13. system as claimed in claim 9 is characterized in that, described heater comprises an inductive energy source that is installed in the described heating clamber, so that inductive energy is guided on the described mould.
14. system as claimed in claim 9, it is characterized in that, described heater comprises an oxygen chamber of installing along described thermal chamber, comes and binding agent reaction and burning thereby Oxygen Flow is drawn described mould, so that improve the temperature of the foundry goods in described mould.
15. system as claimed in claim 9 is characterized in that, described heater also comprises an energy source that is positioned at described heating clamber, is used for energy is applied to described mould so that from the described mould of inside and outside heating.
16. system as claimed in claim 9 is characterized in that, also comprises a quenching platform that is used to quench through heat treated foundry goods.
17. system as claimed in claim 9 also comprises being used for fluid media (medium) is directed to the device of foundry goods with at least a portion of decomposition mould.
18. system as claimed in claim 17 is characterized in that, described fluid media (medium) is selected from air, water and deep fat.
19. system as claimed in claim 17 is characterized in that, the device of described directed flow body medium also comprises the device that under high pressure fluid media (medium) is directed on the foundry goods.
20. system as claimed in claim 17 is characterized in that, described mould comprises a core, wherein fluid media (medium) is guided to foundry goods and is comprised with the device of at least a portion of decomposing mould and be used to apply the device of fluid media (medium) with at least a portion of decomposing core.
21. system as claimed in claim 17 also comprises the device that links to each other with described heat treatment platform, this device is placed on mould in the described heat treatment platform to come the foundry goods in the mould is heat-treated, and described foundry goods is aligned in the position to limit, demarcate.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14639099P | 1999-07-29 | 1999-07-29 | |
| US60/146,390 | 1999-07-29 | ||
| US15090199P | 1999-08-26 | 1999-08-26 | |
| US60/150,901 | 1999-08-26 | ||
| US20274000P | 2000-05-10 | 2000-05-10 | |
| US60/202,740 | 2000-05-10 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008108358A Division CN1172760C (en) | 1999-07-29 | 2000-07-27 | Heat treatment and sand removal for castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1672835A CN1672835A (en) | 2005-09-28 |
| CN1315601C true CN1315601C (en) | 2007-05-16 |
Family
ID=27386393
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100789682A Expired - Fee Related CN1315601C (en) | 1999-07-29 | 2000-07-27 | Methods and apparatus for heat treatment and sand removal for castings |
| CNB008108358A Expired - Fee Related CN1172760C (en) | 1999-07-29 | 2000-07-27 | Heat treatment and sand removal for castings |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008108358A Expired - Fee Related CN1172760C (en) | 1999-07-29 | 2000-07-27 | Heat treatment and sand removal for castings |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP1225993B1 (en) |
| JP (2) | JP3817476B2 (en) |
| KR (1) | KR100805514B1 (en) |
| CN (2) | CN1315601C (en) |
| AT (1) | ATE397986T1 (en) |
| AU (1) | AU781487B2 (en) |
| CA (1) | CA2391349C (en) |
| DE (1) | DE60039180D1 (en) |
| HK (2) | HK1048085B (en) |
| MX (1) | MXPA02000936A (en) |
| WO (1) | WO2001008836A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6622775B2 (en) | 2000-05-10 | 2003-09-23 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
| MXPA03006906A (en) * | 2001-02-02 | 2004-01-29 | Cons Eng Co Inc | Integrated metal processing facility. |
| US7331374B2 (en) * | 2001-05-09 | 2008-02-19 | Consolidated Engineering Company, Inc. | Method and apparatus for assisting removal of sand moldings from castings |
| CN1329149C (en) * | 2002-07-11 | 2007-08-01 | 联合工程公司 | Method and apparatus for assisting removal of sand molding from castings |
| CN100335208C (en) * | 2002-08-08 | 2007-09-05 | 联合工程公司 | Methods and apparatus for heat treatment and sand removal for castings |
| WO2006004756A2 (en) * | 2004-06-28 | 2006-01-12 | Consolidated Engineering Company, Inc. | Method and apparatus for removal of flashing and blockages from a casting |
| US20060103059A1 (en) * | 2004-10-29 | 2006-05-18 | Crafton Scott P | High pressure heat treatment system |
| MX370862B (en) | 2013-09-04 | 2020-01-08 | Nemak Sab De Cv | Method for removing a cast part cast from a light metal melt from a casting mould. |
| DE102014110826A1 (en) * | 2014-07-30 | 2016-02-04 | Fritz Winter Eisengiesserei Gmbh & Co. Kg | Method for casting castings |
| CN104493100B (en) * | 2014-12-25 | 2016-12-07 | 安徽省恒泰动力科技有限公司 | A kind of flusher of casting water dissolved salt core |
| CN104985113B (en) * | 2015-08-12 | 2017-04-12 | 苏州明志科技有限公司 | Sand mould casting sand shakeout, heat treatment and sand regeneration integrated device |
| CN107737883A (en) * | 2017-08-31 | 2018-02-27 | 太仓格瑞斯金属制品有限公司 | A kind of coldplate casting method |
| CN111906292A (en) * | 2019-05-08 | 2020-11-10 | 潜山县凯创橡塑机械制造有限公司 | Alloy bush production line |
| CN113184555B (en) * | 2021-05-07 | 2022-07-22 | 济南市平阴县玛钢厂 | Casting hardening and tempering integrated process system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499940A (en) * | 1983-08-01 | 1985-02-19 | Williams International Corporation | Casting process including making and using an elastomeric pattern |
| US5071487A (en) * | 1990-02-16 | 1991-12-10 | Cmi International, Inc. | Method and apparatus for cleaning passageways in metal castings |
| US5294094A (en) * | 1989-09-29 | 1994-03-15 | Consolidated Engineering Company | Method and apparatus for heat treating metal castings |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0191957A (en) * | 1987-03-03 | 1989-04-11 | Mazda Motor Corp | Heat treatment for casting |
| JPH03465A (en) * | 1989-05-26 | 1991-01-07 | Toyota Motor Corp | Method for removing core |
| EP0546210B2 (en) * | 1991-05-24 | 2003-07-09 | Consolidated Engineering Company, Inc. | Method and apparatus for heat treating metal castings |
| US5465780A (en) | 1993-11-23 | 1995-11-14 | Alliedsignal Inc. | Laser machining of ceramic cores |
| US5706881A (en) | 1994-05-12 | 1998-01-13 | Howmet Research Corporation | Heat treatment of superalloy casting with partial mold removal |
| US5901775A (en) * | 1996-12-20 | 1999-05-11 | General Kinematics Corporation | Two-stage heat treating decoring and sand reclamation system |
-
2000
- 2000-07-27 CN CNB2004100789682A patent/CN1315601C/en not_active Expired - Fee Related
- 2000-07-27 JP JP2001513545A patent/JP3817476B2/en not_active Expired - Fee Related
- 2000-07-27 CN CNB008108358A patent/CN1172760C/en not_active Expired - Fee Related
- 2000-07-27 AT AT00952228T patent/ATE397986T1/en not_active IP Right Cessation
- 2000-07-27 CA CA002391349A patent/CA2391349C/en not_active Expired - Fee Related
- 2000-07-27 DE DE60039180T patent/DE60039180D1/en not_active Expired - Lifetime
- 2000-07-27 MX MXPA02000936A patent/MXPA02000936A/en active IP Right Grant
- 2000-07-27 AU AU64966/00A patent/AU781487B2/en not_active Ceased
- 2000-07-27 KR KR1020027001148A patent/KR100805514B1/en not_active IP Right Cessation
- 2000-07-27 EP EP00952228A patent/EP1225993B1/en not_active Expired - Lifetime
- 2000-07-27 WO PCT/US2000/020466 patent/WO2001008836A1/en active IP Right Grant
-
2003
- 2003-01-08 HK HK03100189.8A patent/HK1048085B/en not_active IP Right Cessation
-
2005
- 2005-10-25 JP JP2005310562A patent/JP2006061988A/en active Pending
-
2006
- 2006-01-20 HK HK06100922A patent/HK1080784A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499940A (en) * | 1983-08-01 | 1985-02-19 | Williams International Corporation | Casting process including making and using an elastomeric pattern |
| US5294094A (en) * | 1989-09-29 | 1994-03-15 | Consolidated Engineering Company | Method and apparatus for heat treating metal castings |
| US5071487A (en) * | 1990-02-16 | 1991-12-10 | Cmi International, Inc. | Method and apparatus for cleaning passageways in metal castings |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6496600A (en) | 2001-02-19 |
| EP1225993B1 (en) | 2008-06-11 |
| JP2006061988A (en) | 2006-03-09 |
| CN1672835A (en) | 2005-09-28 |
| WO2001008836A1 (en) | 2001-02-08 |
| EP1225993A4 (en) | 2004-09-01 |
| CA2391349C (en) | 2009-09-15 |
| DE60039180D1 (en) | 2008-07-24 |
| CA2391349A1 (en) | 2001-02-08 |
| CN1364104A (en) | 2002-08-14 |
| KR20020026552A (en) | 2002-04-10 |
| JP2003505254A (en) | 2003-02-12 |
| KR100805514B1 (en) | 2008-02-20 |
| JP3817476B2 (en) | 2006-09-06 |
| HK1080784A1 (en) | 2006-05-04 |
| AU781487B2 (en) | 2005-05-26 |
| ATE397986T1 (en) | 2008-07-15 |
| MXPA02000936A (en) | 2002-08-06 |
| HK1048085A1 (en) | 2003-03-21 |
| CN1172760C (en) | 2004-10-27 |
| HK1048085B (en) | 2005-06-03 |
| EP1225993A1 (en) | 2002-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1315601C (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| US7290583B2 (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| CN102277480B (en) | Integrated metal processing facility | |
| US6672367B2 (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| US8663547B2 (en) | High pressure heat treatment system | |
| CN100335208C (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| US7275582B2 (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| US20080011443A1 (en) | Methods and apparatus for heat treatment and sand removal for castings | |
| KR20070024675A (en) | Integrated metal processing facility | |
| AU2003259701B2 (en) | Methods and apparatus for heat treatment and sand removal for castings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1080784 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070516 Termination date: 20150727 |
|
| EXPY | Termination of patent right or utility model |