CN100389908C - Production method for metallic material in metal forming machine - Google Patents
Production method for metallic material in metal forming machine Download PDFInfo
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- CN100389908C CN100389908C CNB2005800002186A CN200580000218A CN100389908C CN 100389908 C CN100389908 C CN 100389908C CN B2005800002186 A CNB2005800002186 A CN B2005800002186A CN 200580000218 A CN200580000218 A CN 200580000218A CN 100389908 C CN100389908 C CN 100389908C
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Abstract
To insert a cylindrical metallic raw material into a melting cylinder provided in a heating holding cylinder of a metal molding apparatus and to efficiently semi-melt or completely melt the cylindrical metallic raw material, a clearance between an inner circumferential surface of the melting cylinder and an outer circumferential surface of the cylindrical metallic raw material is limited to a range in which the clearance does not exceed 1.0 mm with respect to the inner diameter of the melting cylinder and the diameter of the metallic raw material during thermal expansion and the insertion of the metallic raw material in a non-thermal expansion state into the thermally expanding melting cylinder is possible, from a linear expansion coefficient of a metallic raw material and a linear expansion coefficient of a material of the melting cylinder.
Description
Technical field
The present invention relates to a kind of in the equipment of molding metal the raw-material method in deposite metal, wherein melt by casting or extrude the raw material metal that forms cylindrical shape and be injected in the mould, thus the required article of injection molding.
Background technology
Molding apparatus as magnesium alloy etc., known with lower device: it comprises the peripheral heater of the cylinder with open-ended nozzle, and to supplying the granular metal raw material in the cylinder ((heating holding cylinder) heats holding bin) of the dress motlten metal of part formation endways by the diameter that reduces the measuring room that is connected with jet hole, thereby fusing and accumulation metal material, perhaps motlten metal and the accumulation that supply is melted by melting furnace in the cylinder of dress motlten metal, thereby the metering motlten metal, and seesawing of the injection piston that provides in the cylinder by the dress motlten metal injected mould (consulting open (Laid-Open) patent application of Japan's special permission 2003-200249 number).
In addition, the method of known following casting metals article: it is after the cylindrical metal raw material level that will form by cool metal slurry casting infeeds in the injection device of preheating, and the preheated material that heating is accumulated in the heating clamber is injected mould (consult Japan and specially permit publication application 2001-252759 number) to the semi-molten state and by sucking rod with the material of accumulation.
Summary of the invention
The problem to be solved in the present invention
The easy oxidation of granular metal raw material and be lightweight.Therefore, even material splashes in the cylinder of dress motlten metal, described material slightly is absorbed in the motlten metal, fusing immediately, and most of material floats and being deposited on the surface of motlten metal, and be exposed in the hot-air for a long time.Therefore, be easy to generate disintegrating slag.By casting or the granular metal raw material are extruded into than particle shape have the more cylinder form (being also referred to as pole) of suboxides degree.
But, can not directly in the cylinder of dress motlten metal, use the cylindrical metal raw material, and after melting fully, use through melting furnace, perhaps, be heated into the semi-molten state then by the preheating of preheating tube, be accumulated in the heating clamber.Therefore, size that the metal mold apparatus need be big and maintenance are problems.
Can address the above problem by the following method: adopt cylinder as the raw-material melting appartus of cylindrical metal; The vertical fusing cylinder of installing in being integrated with the heating holding bin of injection device; And in the heating holding bin of metallic state that is in semi-molten or complete molten metal state, supply the cylindrical metal raw material, be inserted in the cylindrical metal raw material that melt in the cylinder from its peripheral heating and fusing simultaneously.
Because this metal mold apparatus is formed by heating holding bin and melting cylinder, its size is little and maintenance is easy.But, because the radiant heat by the heater around the fusing cylinder is implemented the raw-material fusing of cylindrical metal indirectly, efficiency of heating surface ratio is by splashing into material in the motlten metal, contact with motlten metal and directly to heat the situation of the raw-material melting furnace of cylindrical metal low, and fusing cost more time.
Space between fusing cylinder and the cylindrical metal raw material becomes the reason of described fusing cylinder efficiency of heating surface variation.Consider easy insertion cylindrical metal raw material and set described space, and by before heating (under the situation of no thermal expansion) determine that according to the raw-material diameter of cylindrical metal the internal diameter of fusing cylinder sets described space.Because when setting the internal diameter of described fusing cylinder, the internal diameter of raw-material diameter of cylindrical metal and fusing cylinder has allowable tolerance, and owing to adhere to oxide, the fusing cylinder has the narrow part of part etc. in internal diameter, has considered that therefore above-mentioned condition sets described space.As a result, described space is often bigger inevitably.
By from the radiation of fusing cylinder when heating, can not be from its basal surface and top surface heating cylindrical metal raw material.Therefore, heating is confined to the raw-material periphery of cylindrical metal.Therefore, the raw-material middle body of cylindrical metal is heated to fusion temperature need take long to, and this also is a main cause of cylindrical metal raw material efficiency of heating surface difference.
The photothermal efficiency of heating surface of fusing cylinder reduces along with the increase of described space (thermal resistance).When set the space in order to improve the efficiency of heating surface be less value, the inner surface of the approaching more fusing cylinder of the raw-material outer surface of cylindrical metal, it is vertical more that the cylindrical metal raw material are inserted in the fusing cylinder, and it is problematic being inserted into the basal surface that melts cylinder downwards by himself weight since like this.The supply that postpones raw material metal owing to the trouble of this insertion operation causes that sometimes the accumulation of raw material metal in the heating holding bin reduces and hinders molded operation.
The purpose of this invention is to provide a kind of in the metal mold apparatus the raw-material new method in deposite metal, space when it passes through according to the linear expansion coefficient setting thermal expansion of raw material metal and every kind of fusing cylinder material has solved the above-mentioned problem that is difficult to the cylindrical metal raw material are inserted the vertically arranged fusing cylinder and the efficiency of heating surface.
In addition, another object of the present invention provide a kind of in the metal mold apparatus the raw-material new method in deposite metal, it is by implementing to heat the cylindrical metal raw material by the shell portion of radiant heat heat fused cylinder with partly contacting from its basal surface simultaneously, solve the problem of efficiency of heating surface difference, and suppressed the generation of disintegrating slag by the polishing metal raw material.
Solve the measure of described problem
By following in the metal mold apparatus the raw-material method in deposite metal realized purpose of the present invention, described method comprises the following steps: by casting or extrudes and make raw material metal be shaped to cylindrical shape; Will be as the described cylindrical metal raw material of the moulding material fusing cylinder in top insertion is vertically mounted on the heating holding bin of described metal mold apparatus; And by being located at the heater semi-molten around the described fusing cylinder or melting described cylindrical metal raw material fully, wherein according to the linear expansion coefficient of raw material metal with as the linear expansion coefficient of the metal material of fusing cylinder, set the space between interior perimeter surface of described fusing cylinder and the described cylindrical metal raw material peripheral surface in advance, so that during thermal expansion with regard to the internal diameter and the raw-material diameter of described cylindrical metal of described fusing cylinder, described space is no more than 1.0 millimeters, and under the temperature of described heater, the described cylindrical metal raw material of non-heat expands state can be inserted in the fusing cylinder of described thermal expansion.In addition, the fusing cylinder is made up of the linear expansion coefficient metal material littler than the linear expansion coefficient of raw material metal.
In addition, in the present invention, the fusing cylinder comprises the funnel type bottom that is connected with fusing cylinder shell portion; At the diameter at this bottom center place effuser less than shell portion; Laterally be installed in the auxiliary heating parts of the shell portion bottom adjacent with the bottom of melting cylinder, the two ends of described auxiliary heating parts are fixed on the barrel; And be installed on the shell portion and heater that effuser is placed outward; And by the heating that contacts of the photothermal heating of cylindrical shell periphery and raw material metal basal surface, and implement the fusing of raw material metal with the basal surface of described auxiliary heating parts part support cylinder shape raw material metal by simultaneously.
In addition, can a plurality of auxiliary heating parts be installed, support the raw-material basal surface of described cylindrical metal with part in the shell portion lower central place lateral cross adjacent with described fusing cylinder bottom.In addition, in described auxiliary heating parts, provide heater, and, directly heat the raw-material middle body of described cylindrical metal from its basal surface by the contacting of described auxiliary heating parts and described cylindrical metal raw material basal surface.
Raw material metal of the present invention is by low-melting metal alloy, and for example magnesium alloy, aluminium alloy etc. are made, and described magnesium alloy shows thixotropic nature under the temperature of solid-liquid coexistence warm area.In addition, the hole (cavities) that in cutting and remove the raw-material superficial layer of cylindrical metal, produces and adhere to impurity on the material surface after, implement the fusing of raw material metal.
Effect of the present invention
In the present invention, even fusing cylinder and the space c of cylindrical metal raw material during thermal expansion are set in the scope that is no more than 1 millimeter, because the cylindrical metal raw material are in non-heat expands state when it heats, so when the cylindrical metal raw material insert, partly form specific heat big space, space between the phase of expansion in its non-thermal expansion.Therefore, even fusing cylinder of setting based on space during the thermal expansion and the space of cylindrical metal raw material during non-thermal expansion be the insertion limit of subcylindrical raw material metal to a certain extent, also can implement the raw-material insertion of cylindrical metal without a doubt.In addition, because spontaneous the narrowing down in the described space of thermal expansion by the raw material metal that inserts, so improved the efficiency of heating surface and shortened fusing time, thereby can be according to implementing the raw-material fusing of cylindrical metal moulding cyclc, and implement effectively in the heating holding bin, to use and accumulate the motlten metal raw material.In addition, even when changing the material of fusing cylinder, can be according to the suitable space of thermal linear expansion coefficient setting of use material.
In addition, according to said structure, because the raw-material basal surface part of cylindrical metal is supported by auxiliary heating parts and is positioned on the funnel type bottom, so when by the time from the peripheral thermoplastic cylindrical metal of the shell portion of material raw material, auxiliary heating parts since the raw-material load of cylindrical metal enter the cylindrical metal raw material from the raw-material basal surface of cylindrical metal.Because auxiliary heating parts is by heating from the heat transmission of shell portion or the heater by embedding, the cylindrical metal raw material receive from the heating of basal surface inside with from the heating of cylindrical shell periphery, also compare with the cartridge heater body is peripheral with the situation of the whole basal surface of fusing cylinder interior basal surface support cylinder shape raw material metal, this has improved the efficiency of heating surface biglyyer, thereby fusing time shortens.
Thereby, can implement the melt supply and the accumulation of the raw material metal of corresponding and moulding cyclc.In addition,, and removed and adhere to lip-deep oxide impurity etc., and the cylindrical metal raw material melt in the fusing cylinder, so reduced the generation of oxide disintegrating slag (sludge) because cut hole on the cylindrical metal materials statement surface layer.Therefore, can prolong the cycle or the time that comprise the periodicmaintenance of avoiding disintegrating slag, and because the minimizing of maintenance times has improved production efficiency.In addition, significantly reduce the substandard products that are mixed with disintegrating slag, thereby can improve productive rate.
In addition, because in the raw material metal of the metal structure that shows thixotropic nature, distribution at the eutectic crystal of solid-liquid coexistence warm area fusing is uneven, so even the raw material metal of tip-off forms frit from the cylindrical metal raw material, described frit has the fusing cylinder bottom fusing once more of funnel type bottom.Therefore, frit can not stop melt to flow out the heating holding bin.
Description of drawings
Fig. 1 is the vertical sectional view of having taked according to the metal mold apparatus embodiment of the raw-material method in deposite metal of the present invention;
Fig. 2 is the phantom in expression fusing cylinder and cylindrical metal raw material space during thermal expansion;
Fig. 3 is the phantom in expression fusing cylinder and cylindrical metal raw material space during non-thermal expansion;
Fig. 4 comprises that part contacts the bottom longitudinal sectional view of the fusing cylinder of the auxiliary heating parts that heats cylindrical metal raw material basal surface middle body;
Fig. 5 is its underpart longitudinal profile front view, and
Fig. 6 is the profile view of fusing cylinder in bottom transverse is intersected the situation that a plurality of auxiliary heating parts are installed.
The specific embodiment
Heating holding bin 2 comprises the fusing feeding mechanism 3 in the supply opening that is contained in upside in the cylindrical shell 21 basically, and the heater 24 of the cylindrical shell 21 outer band heaters of placing.Show in the situation of thixotropic nature at solid-liquid coexistence warm area at raw material metal (for example magnesium alloy and aluminium alloy) as moulding material, the temperature that will be heated holding bin 2 by heater 24 is located between liquidus temperature and the solidus temperature, and need in the situation of fusing fully at raw material metal, the temperature of heating holding bin 2 is located at liquidus temperature and higher.
Heating holding bin 2 is connected on the support component 23 at the afterbody of cylindrical shell, and becomes miter angle to tilt together with horizontal plane with injection drive 4.Be in tilted layout down at this of heating holding bin 2, the leading section inside that is connected at the nozzle opening of the jet element below being positioned at 22 is measuring room 25.But the injection piston 26a of injection device 26 is installed with the inserted mode of projection and withdrawal in measuring room 25.Injection piston 26a is connected with the end of excellent 26b, but and be embedded with on the peripheral surface of sealing ring, projection and withdrawal ground comprise check-valves 26c on around the injection piston 26a axle.
In addition, insert in the material supply opening on the cylindrical shell 21, and will supply cylinder 33 and be connected on the arm member 27 that is fixed on the support component 23, fusing feeding mechanism 3 is vertically mounted on heats on the holding bin 2 by the bottom that will melt cylinder 31.In addition, from the bottom of fusing feeding mechanism 3 to the molten metal surface L inside of heating holding bin 2, and the upper space of fusing cylinder 31 is installed the inert gas that is used for argon gas etc. respectively and is filled pipe 34a and 34b.
In this fusing feeding mechanism 3, when the upper opening by supply cylinder 33 inserted cylindrical metal raw material M, cylindrical metal raw material M dripped on the basal surface that melts cylinder 31 owing to own wt and contacts with the bottom.Described cylindrical metal raw material M is by from the radiant heat around the fusing cylinder 31 and semi-molten or fusing fully.The motlten metal raw material flow downward by service duct 31a, are accumulated in the heating holding bin 2.Afterwards, the motlten metal raw material inject measuring room 25 by the motion backward of injection piston 26a and weigh.Then, by travelling forward of injection piston 26a described motlten metal raw material are injected the mould that does not show.
In Fig. 2 and 3, by the difference between the diameter d of fusing inside diameter D of cylinder and cylindrical metal raw material M produce above-mentioned fusing cylinder 31 in enclose space c between the peripheral surface of surface and cylindrical metal raw material M, and half of described difference is defined as space c.Usually for the ease of inserting cylindrical metal raw material M, before fusing cylinder and cylindrical metal raw material are all accepted heating, during non-thermal expansion, set space c.But c is more little in the space, and the efficiency of heating surface is high more.Therefore, this sets the space of melting between cylinder 31 and the cylindrical metal raw material M during being in thermal expansion.
According to the thermal linear expansion coefficient of the used metal material of raw material metal and fusing cylinder, the inside diameter D of the diameter d of cylindrical metal raw material M and fusing cylinder is set described space c as index during the use thermal expansion.In the case, preferably should can keep shape and can not use the thermal expansion temperature under the ceiling temperature (being 550 ℃ for example) owing to the thermal expansion distortion at cylindrical metal raw material M for magnesium alloy.Space c is narrow more, and it is high more that the efficiency of heating surface becomes.Yet when space c was too narrow, it is difficult that the insertion of cylindrical metal raw material M becomes.Therefore, for the ease of inserting cylindrical metal raw material M and considering the efficiency of heating surface, the space c that cylindrical metal raw material M and fusing cylinder 31 all are in during the thermal expansion is located in the scope that is no more than 1.0 millimeters, and under described scope, the space c when setting the fusing cylinder 31 under the cylindrical metal raw material M insertion heat expands state that is in non-heat expands state is no more than 1.5 millimeters.In addition, in order to prevent space c, use linear expansion coefficient less than the metal material of the linear expansion coefficient of raw material metal metal material as fusing cylinder 31 owing to thermal expansion increases.
Even cylindrical metal raw material M that sets based on described space c and the space c ' of fusing cylinder 31 during non-thermal expansion since oxide adhere to fusing cylinder 31 in enclose that the surface is gone up and less than the insertion limit (about 0.8 millimeter) of cylindrical metal raw material M, because when cylindrical metal raw material M inserts, do not heat cylindrical metal raw material M, so it does not have the non-thermal expansion of thermal expansion and cylindrical metal raw material M partly to make space c ' become big.Therefore, can insert cylindrical metal raw material M without a doubt.In addition, even owing to the difference in space, the left and right sides takes place the raw-material insertion deviation of cylindrical metal, described difference is in being no more than 1.0 millimeters space scope, and described difference can not produce remarkable influence to the efficiency of heating surface.As a result, can set the space, make efficiency of heating surface height and cylindrical metal raw material M can be inserted smoothly and melt in the cylinder.Even in the situation of the fusing of enforcement cylindrical metal raw material M in fusing cylinder 31, can be according to fusing supply and the accumulation of implementing raw material metal moulding cyclc.
Auxiliary heating parts 34 is not limited to this, although omitted in the accompanying drawings, and compartment of terrain and put a plurality of bridge joint auxiliary heating parts in the horizontal direction.Alternatively, as shown in Figure 6, can the horizontally disposed a plurality of bridge joint auxiliary heating parts of right-angled intersection mode.In the case, insert the auxiliary heating parts of cross shape from the border of the upper opening bottom 35 of fusing cylinder 31, and be suspended on the barrel wall of fusing cylinder 31.In addition, although omitted from accompanying drawing, when directly using the inside of auxiliary heating parts 37 heated base, auxiliary heating parts 37 is formed by body, and from the shell portion of fusing cylinder 3 cartridge heater is inserted body, implement heating thereby be independent of fusing cylinder 31.
In addition, when cylindrical metal raw material M being inserted fusing cylinder 31, preferably remove in the casting of cylindrical metal raw material M by cutting in advance or extrude the hole on the superficial layer that produces down and adhere to lip-deep oxide impurity etc.Enter the airborne oxygen of going up in oxide and the superficial layer hole on the surface and pass through the heat fusing formation metal oxide of raw material metal, thereby become disintegrating slag easily.Described disintegrating slag is deposited in the heating holding bin 2, and molded operation is counteracted, and perhaps forms substandard products in the molded article by sneaking into.Therefore, remove the generation that scalping can significantly reduce disintegrating slag by cutting about 1 to 5 millimeters deep.
Under default fusion temperature, cylindrical metal raw material M is inserted the fusing cylinder 31 from upper opening.On the fusing cylinder weighed down as upper/lower positions, the basal surface of cylindrical metal raw material M contacted with auxiliary heating parts 37 and is received by auxiliary heating parts 37 cylindrical metal raw material M on described position by own wt.In the fusing cylinder, around the radiations heat energy heating cylindrical shell of heater 32, and simultaneously through contact the directly central authorities of the described basal surface of heating with the line of auxiliary heating parts 37.When the temperature of cylindrical metal raw material M surpassed solidus temperature, cylindrical metal raw material M was softening.Thereby the auxiliary heating parts 37 of support cylinder shape raw material metal M load enters the middle body of cylindrical metal raw material M from its basal surface.In addition, along with entering of auxiliary heating parts 37, the softening basal surface of cylindrical metal raw material M is outstanding from the both sides of auxiliary heating parts 37, shown in the imaginary line among Fig. 4, and auxiliary heating parts 37 further enter cylindrical metal raw material M than top, heat its middle body.Therefore, with the heating of implementing cylindrical metal raw material M from the heating around the cylindrical shell effectively.
When the temperature of cylindrical metal raw material M surpassed liquidus temperature by fusing cylinder 31, raw material metal was fused into motlten metal fully.But, metal structure shows in the raw material metal of thixotropic nature under the temperature of solid-liquid coexistence warm area, before the liquidus temperature that reaches the semi-molten condition that will be in liquid phase and solid phase, the eutectic crystal that is distributed in the crystal melts under the temperature of solid-liquid coexistence warm area.Before the fusing of the top of cylindrical metal raw material M, the reception that is melted in of cylindrical metal raw material M is carried out from around the cylindrical shell and the bottom of middle body heat, and motlten metal flows in the effuser 36 that diameter reduces by bottom 35, and accumulates as the motlten metal M1 that shows the semi-molten state of thixotropic nature in above-mentioned heating holding bin 2.Along with the increase of melt amount, motlten metal M1 is downward through effuser 36 and is accumulated in the bottom 35.
Because the distribution of eutectic crystal in the raw material metal of the metal structure that shows thixotropic nature is uneven, melting condition also is different, and the enforcement of fusing is also inhomogeneous, and little frit can fall from raw material metal M.But because the funnel type of installing in auxiliary heating parts 37 bottoms that is heated bottom 35 and effuser 36, frit melts frit once more and also flows in fusing on the bottom wall surface and when effuser 36 is passed through on its surface from diapire.In addition, when producing melt storage (meltreservoir) on bottom 35, frit is absorbed in the melt storage, fusing once more.Therefore, even produce frit, can not hinder the enforcement of fusing yet and can not cause that frit stops up effuser 36.Therefore, can reduce the fusing time of raw material metal.
Embodiment
Impose a condition (mm size) in space
Raw material metal: magnesium alloy (AZ91D)
Linear expansion coefficient: 27.0 * 10
-6/ K
Shape: cylinder
Length: 300
The material of fusing cylinder: stainless steel (SUS 304)
Linear expansion coefficient: 16.5 * 10
-6/ K
Shape: cylinder height: 610
Heater: band heater, stable power 5kW
Heating-up temperature: 550 ℃
| Non-thermal expansion | Thermal expansion | |
| Cylinder diameter | 60.0(A) | 60.891 |
| The fusing barrel bore | 61.0 | 61.554(B) |
| The difference of diameter and internal diameter | 1.0 | 0.663 |
| The space | 0.5 | 0.331 |
Embodiment 2
| Non-thermal expansion | Thermal expansion | |
| Cylinder diameter | 60.0(A) | 60.891 |
| The fusing barrel bore | 61.5 | 62.058(B) |
| The difference of diameter and internal diameter | 1.5 | 1.167 |
| The space | 0.75 | 0.583 |
| Non-thermal expansion | Thermal expansion | |
| Cylinder diameter | 60.0(A) | 60.891 |
| The fusing barrel bore | 62.0 | 62.536(B) |
| The difference of diameter and internal diameter | 2.0 | 1.672 |
| The space | 1.0 | 0.836 |
Embodiment 4
| Non-thermal expansion | Thermal expansion | |
| Cylinder diameter | 60.0(A) | 60.891 |
| The fusing barrel bore | 62.3 | 62.865(B) |
| The difference of diameter and internal diameter | 2.3 | 1.974 |
| The space | 1.15 | 0.987 |
Embodiment 5
| Non-thermal expansion | Thermal expansion | |
| Cylinder diameter | 60.0(A) | 60.891 |
| The fusing barrel bore | 63.0 | 63.572(B) |
| The difference of diameter and internal diameter | 3.0 | 2.681 |
| The space | 1.5 | 1.340 |
Draw by last table, among each embodiment during (1), non-thermal expansion/thermal expansion during non-thermal expansion/non-thermal expansion (2), and the space (unit, millimeter) of (3) during thermal expansion/thermal expansion:
| (1) | (2) | (3) | |
| |
0.5 | 0.777 | 0.331 |
| Embodiment 2 | 0.75 | 1.029 | 0.583 |
| |
1.0 | 1.252 | 0.836 |
| Embodiment 4 | 1.15 | 1.433 | 0.987 |
| Embodiment 5 | 1.5 | 1.786 | 1.340 |
In the case, the space of (2) is respectively the value of (B)-(A)/2 during non-thermal expansion/thermal expansion, and these spaces become above-mentioned cylindrical insertion space.
Until cylindrical metal raw material under 600 ℃ heating-up temperature melt fully the time of (liquid phase state) (minute)
| |
Embodiment 2 | |
Embodiment 4 | Embodiment 5 |
| 12 | 13 | 15 | 17 | 20 |
Condition of moulding
Product quality: 40 grams (mould)
Raw material metal: quality: 1.5 kilograms (being roughly equal to 37 moulds)
Moulding cyclc (mould): 30 seconds
Heating-up temperature: 600 ℃
Moulding cyclc correspondence fusing time (37 moulds * 30 second): about 19 minutes
Metal mold apparatus: FMg 3000 (Nissei Plastic Industrial Co.Ltd. production)
The result
In the above-described embodiments, because embodiment 1 has little space during both's thermal expansion, so the efficiency of heating surface becomes best and fusing time is about 12 minutes.But,,, can not use embodiment 1 less than about 0.8 millimeter that thinks to insert the limit because the space during non-thermal expansion/thermal expansion is 0.77 millimeter when the cylinder that is in non-heat expands state inserts in the fusing cylinder.
In addition, because embodiment 5 has big space during both's thermal expansion, so the above-mentioned cylinder that is in non-heat expands state inserts in the fusing cylinder easily, but be that the proportional change in space during non-thermal expansion/thermal expansion is big, the fusing of efficiency of heating surface difference and material even need about 20 minutes.Therefore, in the fusing time (about 19 minutes) of corresponding above-mentioned moulding cyclc, can not melt all material of embodiment 5.Therefore, because the cylinder that can not stablize embodiment 5 is supplied to the heating holding bin, it can not be used.
In embodiment 2, although the space between cylinder and the fusing cylinder is 0.75 millimeter during the both is non-thermal expansion, it is less than the above-mentioned insertion limit, and the space during non-thermal expansion/thermal expansion increases to 1.029 millimeters, and the limit is big than inserting.Therefore, cylinder can insert in the fusing cylinder.In addition, because fusing time (13 minutes) is in the fusing time (about 19 minutes) corresponding to above-mentioned moulding cyclc, so can use embodiment 2.But, because the long-term use of process embodiment 2 is melted the influence of the oxide adhesion that produces on the cylinder inner surface easily, so need clean described bur every the regular hour.
In embodiment 3, because the space among the void ratio embodiment 2 during formed non-thermal expansion/thermal expansion is big, be 1.252 millimeters, so inserting in the fusing cylinder, cylinder becomes easy.In addition,, and fully guaranteed the space because fusing time (15 minutes) is in the molding cycle (about 19 minutes) corresponding to above-mentioned moulding cyclc, thus be difficult for producing since among the embodiment 2 oxide adhere to the influence that brings.Therefore, do not need cleaning for a long time, and most preferably can insert cylinder and deposite metal raw material under the condition.
In embodiment 4, bigger because the space during the non-thermal expansion/thermal expansion that forms is 1.433 millimeters than the space among the embodiment 3, so inserting in the fusing cylinder, cylinder becomes easy.In addition, be not easy to take place to adhere to the influence that brings, so do not need cleaning by oxide.But, because the reduction fusing time of the efficiency of heating surface is elongated.But, because the fusing time (17 minutes) of all amount raw material metals is in the applicable scope near the situation of embodiment 4 in the fusing time (about 19 minutes) corresponding to above-mentioned moulding cyclc.
Therefore, from embodiment 2 to 4 obviously as seen, if with regard to the inside diameter D and the raw-material diameter d of described cylindrical metal of described fusing cylinder during the thermal expansion, set described space and be no more than 1.0 millimeters, just can above-mentioned cylindrical metal raw material be inserted in the fusing cylinder smoothly, and linear expansion coefficient according to raw material metal and linear expansion coefficient and fusing cylinder material, the deposite metal raw material are possible in corresponding to the fusing time of moulding cyclc, and under non-thermal expansion condition, set the actual inner diameter of fusing cylinder, and can easily insert the cylindrical metal raw material in the mold apparatus and deposite metal raw material efficiently in compatible mode.
In addition, form funnel shaped in fusing cylinder bottom, the raw-material basal surface part of cylindrical metal is supported by the auxiliary heating parts of horizontal installation, its two ends are fixed on the barrel of the cylindrical shell bottom adjacent with melting the cylinder bottom, and heat simultaneously cylindrical shell around and in the situation of cylindrical metal raw material basal surface, the efficiency of heating surface is further improved and can reduces fusing time.
Industrial applicibility
By setting the method in space, can solve the cylindrical metal raw material are inserted the difficulty in the metal mold apparatus fusing cylinder and improve the efficiency of heating surface. Therefore, during molten metal feed, need not use melting furnace can implement the continuously moulding of metal product using simple fusing cylinder direct deposite metal raw material in the metal mold apparatus, this is favourable.
Claims (10)
1. raw-material method in deposite metal in the metal mold apparatus, it comprises the following steps: by casting or extrudes to make raw material metal be shaped to cylindrical shape; Will be as the described cylindrical metal raw material of the moulding material fusing cylinder in top insertion is vertically mounted on the heating holding bin of described metal mold apparatus; And by being located at the heater semi-molten around the described fusing cylinder or melting described cylindrical metal raw material fully,
Wherein according to the linear expansion coefficient of raw material metal with as the linear expansion coefficient of the metal material of fusing cylinder, set the space between interior perimeter surface of described fusing cylinder and the described cylindrical metal raw material peripheral surface in advance, so that with regard to the internal diameter and the raw-material diameter of described cylindrical metal of described fusing cylinder during the thermal expansion, described space is no more than 1.0 millimeters, and under the temperature of described heater, the described cylindrical metal raw material of non-heat expands state can be inserted in the fusing cylinder of described thermal expansion.
2. according to the raw-material method in deposite metal in the metal mold apparatus of claim 1, wherein said fusing cylinder comprises the funnel type bottom that is connected with fusing cylinder shell portion; At the diameter at this bottom center place effuser less than shell portion; Laterally be installed in the auxiliary heating parts of the shell portion bottom adjacent with the bottom of melting cylinder, the two ends of described auxiliary heating parts are fixed on the barrel; And be installed on the shell portion and heater that effuser is placed outward; And by the heating that contacts of the photothermal heating of cylindrical shell periphery and raw material metal basal surface, and implement the fusing of raw material metal with the basal surface of described auxiliary heating parts part support cylinder shape raw material metal by simultaneously.
3. according to the raw-material method in deposite metal in the metal mold apparatus of claim 1 or 2, wherein said fusing cylinder is made up of the linear expansion coefficient metal material littler than the linear expansion coefficient of raw material metal.
4. according to the raw-material method in deposite metal in the metal mold apparatus of claim 2, wherein described auxiliary heating parts laterally is installed, is supported the raw-material basal surface of described cylindrical metal with part at the shell portion lower central place adjacent with described fusing cylinder bottom.
5. according to the raw-material method in deposite metal in the metal mold apparatus of claim 2, wherein a plurality of auxiliary heating parts are installed, are supported the raw-material basal surface of described cylindrical metal with part in the shell portion lower central place lateral cross adjacent with described fusing cylinder bottom.
6. according to claim 2 or claim 4 and 5 any one raw-material methods in deposite metal in the metal mold apparatus, wherein in described auxiliary heating parts, provide heater, and, directly heat the raw-material middle body of described cylindrical metal from its basal surface by contacting of described auxiliary heating parts and described cylindrical metal raw material basal surface.
7. according to the raw-material method in deposite metal in the metal mold apparatus of claim 1, wherein said raw material metal is made up of low-melting metal alloy.
8. according to the raw-material method in deposite metal in the metal mold apparatus of claim 7, wherein said raw material metal is made up of the magnesium alloy that shows thixotropic nature under the temperature of solid-liquid coexistence warm area.
9. according to the raw-material method in deposite metal in the metal mold apparatus of claim 7, wherein the hole that in cutting and remove the raw-material superficial layer of cylindrical metal, produces and adhere to impurity on the material surface after, implement the fusing of described raw material metal.
10. the raw-material method in deposite metal in the metal mold apparatus according to Claim 8, wherein the hole that in cutting and remove the raw-material superficial layer of cylindrical metal, produces and adhere to impurity on the material surface after, implement the fusing of described raw material metal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP049975/2004 | 2004-02-25 | ||
| JP2004049975 | 2004-02-25 | ||
| JP179697/2004 | 2004-06-17 |
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| CN1771103A CN1771103A (en) | 2006-05-10 |
| CN100389908C true CN100389908C (en) | 2008-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4210298B2 (en) * | 2006-12-18 | 2009-01-14 | 日精樹脂工業株式会社 | Method for melting rod-shaped material in material melting and holding device of metal forming machine |
| JP4666317B2 (en) * | 2008-01-16 | 2011-04-06 | 日精樹脂工業株式会社 | Rod-like material melting and holding apparatus for metal forming injection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05104201A (en) * | 1991-10-11 | 1993-04-27 | Olympus Optical Co Ltd | Core in casting mold |
| JPH08257725A (en) * | 1995-03-22 | 1996-10-08 | Honda Motor Co Ltd | Induction heating device of ingot of metal forming body |
| JP2001252759A (en) * | 2000-03-08 | 2001-09-18 | Tetsuichi Mogi | Casting method, casting facility, method for producing metallic raw and apparatus for producing metallic raw |
| US20030051851A1 (en) * | 2001-09-17 | 2003-03-20 | Fujio Yamada | Devices and methods for melting materials |
| JP2003200249A (en) * | 2001-12-28 | 2003-07-15 | Nissei Plastics Ind Co | Metal forming machine |
| US20040182537A1 (en) * | 2003-01-31 | 2004-09-23 | Nissei Plastic Industrial Co., Ltd. | Melting and feeding method and apparatus of metallic material in metal molding machine |
-
2005
- 2005-02-24 CN CNB2005800002186A patent/CN100389908C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05104201A (en) * | 1991-10-11 | 1993-04-27 | Olympus Optical Co Ltd | Core in casting mold |
| JPH08257725A (en) * | 1995-03-22 | 1996-10-08 | Honda Motor Co Ltd | Induction heating device of ingot of metal forming body |
| JP2001252759A (en) * | 2000-03-08 | 2001-09-18 | Tetsuichi Mogi | Casting method, casting facility, method for producing metallic raw and apparatus for producing metallic raw |
| US20030051851A1 (en) * | 2001-09-17 | 2003-03-20 | Fujio Yamada | Devices and methods for melting materials |
| JP2003200249A (en) * | 2001-12-28 | 2003-07-15 | Nissei Plastics Ind Co | Metal forming machine |
| US20040182537A1 (en) * | 2003-01-31 | 2004-09-23 | Nissei Plastic Industrial Co., Ltd. | Melting and feeding method and apparatus of metallic material in metal molding machine |
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