CN100400202C - Casting machine - Google Patents

Casting machine Download PDF

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Publication number
CN100400202C
CN100400202C CNB2005800029901A CN200580002990A CN100400202C CN 100400202 C CN100400202 C CN 100400202C CN B2005800029901 A CNB2005800029901 A CN B2005800029901A CN 200580002990 A CN200580002990 A CN 200580002990A CN 100400202 C CN100400202 C CN 100400202C
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CN
China
Prior art keywords
temperature
mould
temperature sensor
casting
deposite metal
Prior art date
Application number
CNB2005800029901A
Other languages
Chinese (zh)
Other versions
CN1910000A (en
Inventor
吉井大
小田隆司
Original Assignee
雅马哈发动机株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP012873/2004 priority Critical
Priority to JP2004012873A priority patent/JP4430411B2/en
Application filed by 雅马哈发动机株式会社 filed Critical 雅马哈发动机株式会社
Publication of CN1910000A publication Critical patent/CN1910000A/en
Application granted granted Critical
Publication of CN100400202C publication Critical patent/CN100400202C/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/08Controlling, supervising, e.g. for safety reasons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/006Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08Protective devices, e.g. casings
    • G01K1/10Protective devices, e.g. casings for preventing chemical attack
    • G01K1/105Protective devices, e.g. casings for preventing chemical attack for siderurgical use

Abstract

A temperature sensor (26) is installed at a portion (runner (21)) at which a molten metal (5) solidifies after the molten metal in cavities (14, 18) in a lower metal mold (12) solidifies. A temperature detecting section (28a) of the temperature sensor (26) is made to be in direct contact with the molten metal (5).

Description

Casting machine
Technical field
The present invention relates to the casting machine of serviceability temperature sensor with direct detection deposite metal temperature.
Background technology
Traditionally, be used for the cylinder head of motor engine for example by the low-pressure casting method manufacturing.JP-B-3201930 discloses the air injection machine of this type.Disclosed casting machine has in this patent documentation: the mould that comprises counterdie and patrix; With the crucible that is arranged under the mould.And it is designed to pressurize and is stored in deposite metal in the crucible, passes the cast gate that stalk is supplied to counterdie to force it.
In order to boost productivity, casting machine be automatic from beginning to supply deposite metal to the operating process of opening mould.More specifically, after the operator outwarded winding starting switch, casting machine was based on time of mould and deposite metal temperature computation supply deposite metal (below be called pressing time), with pressurization deposite metal in this pressing time and subsequently it is supplied to mould.The temperature sensor that embeds in the mould detects mold temperature, and another temperature sensor that is arranged in the crucible detects the deposite metal temperature.Be such length default pressing time: its zone of solidifying that makes after beginning pressing time deposite metal fill mould and deposite metal expands to the bottom to arrive cast gate inside from the top of mould.
In other words, the pressurization of finishing the deposite metal in the past in pressing time allows not solidified metal to flow back into crucible from cast gate by under the stalk.Cast gate inside is stayed in the deposite metal of only solidifying.In this case, the foundry goods that solidifies in the mould does not have flowability, but it is still enough soft easily to be out of shape when taking out mould.This has reduced mold shape and accuracy to size considerably.Therefore, this casting machine is designed to open mould after the standby time, and foundry goods becomes in this standby time enough firmly can not be out of shape after the pressurization of finishing the deposite metal.Mold temperature when the time cycle from the time point of finishing deposite metal pressurization to the time point of opening mould (below be called setting time) is based on the deposite metal supply and stops obtains by calculating.
Summary of the invention
The problem to be solved in the present invention
For the conventional cast machine of as above constructing, need be with higher accuracy detection pressing time and setting time.This is because if the above-mentioned time is inaccurate, then can cause foundry goods to have defective.But, in the casting machine of traditional type, pressurization and setting time all based on mold temperature, and calculate acquisition by the deposite metal temperature that temperature sensor detected in the crucible, this causes accurately determining the restriction of those times.
In addition, in the conventional cast machine, the unnecessary sluggishness of time meeting that is used to finish the time of pressurization deposite metal and is used to open mould.The problem that this causes long cycle time and therefore reduces productivity ratio.These sluggish times come from pressurization and setting time, and they are set to long enough to guarantee to finish fully to the pressurization of deposite metal and to solidify.
The mould that is used for this type of casting machine is sometimes owing to unnecessary blow pressure-air (be used for opening the back at mould and remove the grains of sand from the core that damages, or be used to core is installed next casting cycle) for a long time and sub-cooled.This makes that to be difficult to keep when casting process begins mold temperature constant.Because mold temperature is relatively low when casting process begins, the setting time that then is used for the deposite metal is shorter.Compare, because mold temperature is higher relatively when casting process begins, the setting time that then is used for the deposite metal is longer.In other words, although the temperature of mould can change to some extent as mentioned above, in traditional casting machine, the scheduled long enough that gets of pressurization and setting time is to make the zero defect cast article.
Consider foregoing problems and finished the present invention.The purpose of this invention is to provide a kind of casting machine, it has the productivity ratio of raising, and this becomes no defective product by cycle time to the foundry goods that reduces casting process to greatest extent and reaches during required.
The means of dealing with problems
In order to reach above-mentioned purpose, the invention provides a kind of casting machine, it comprises the temperature sensor that is used for detected temperatures, described temperature is used to the control operation time, wherein said temperature sensor is positioned at such position: what the die cavity place that the solidifying of this position is later than mould took place solidifies the direct contact melting metal of the temperature detection part of described temperature sensor.
Effect of the present invention
As mentioned above, in the casting machine aspect the 1st to 3 according to the present invention, temperature sensor is used to directly detect the temperature that is later than the deposite metal of solidifying at the die cavity place.Stop the deposite metal supply or open mould during this optimum temperature that allows temperature at foundry goods to reach to be used to stop the deposite metal supply or open mould.Thus, in casting machine according to these inventions, can reduce as soon as possible the supply time of deposite metal and setting time (opening) from stop supplies deposite metal to mould to cast no defective product required during.By reducing time casting cycle, this has further improved productivity ratio thus.
In the invention aspect the 4th, can detect the temperature in the deposite metal.In addition, the temperature detection part of temperature sensor can easily remove from foundry goods behind casting process.
Therefore, in casting machine according to the present invention, open or foundry goods during, can prevent that temperature detection part from damaging, detect the temperature of deposite metal simultaneously with high accuracy from mold separation when mould.
In the invention aspect the 5th and 6, be positioned at the outside of the product section of foundry goods near the zone on the border between cast gate in the counterdie and the running channel, therefore have the temperature of the deposite metal in the product section that equals foundry goods substantially and fill this regional deposite metal, and therefore solidify but slightly be later than solidifying of taking place there in the mode identical with product section.Therefore, equal temperature in the product section of foundry goods by the temperature of the outside of the product section of the foundry goods that temperature sensor detected.Therefore, in air injection machine,, can on product section, not stay the vestige of temperature sensor although temperature sensor directly detects the temperature of deposite metal according to these inventions, but so production qualified casting.
In the invention aspect the 7th, air injection machine directly detects the temperature of deposite metal, and determines to finish the time of deposite metal pressurization and the time of opening mould based on the temperature of this detection.This has guaranteed to finish the pressurization of deposite metal in mode the most timely and open mould according to the condition of casting, even the temperature of mould changes when casting process begins.
Therefore,, do not need unnecessarily to prolong or shorten and be used for deposite metal pressurization and setting time, perhaps pressurization and setting time can be minimized to and make foundry goods become the required time of no defective product according to the present invention.This makes to provide to have the further air injection machine that improves productivity ratio.
In the invention aspect the 8th and 9, Gravity casting machines directly detects the temperature of deposite metal, and determines to open based on the temperature of this detection the time of mould.This has guaranteed to open mould according to the condition of casting in mode the most timely, even the temperature of mould changes when casting process begins.
Therefore,, do not need unnecessarily to prolong or shorten the setting time that is used for the deposite metal, perhaps setting time can be minimized to and make foundry goods become the required time of no defective product according to the present invention.This makes to provide to have the further Gravity casting machines that improves productivity ratio.
Description of drawings
Fig. 1 is a front view, shows the structure of air injection machine.
Fig. 2 A is the perpendicular cutaway view of the amplification of mould.
Fig. 2 B is the amplification sectional elevation of mould.
Fig. 3 is the amplification sectional elevation of vitals.
Fig. 4 is the cutaway view of temperature sensor.
Fig. 5 is the flow chart that is used to illustrate the casting machine operation.
Fig. 6 is a coordinate diagram, and how the deposite metal temperature that illustrates in the running channel changes.
Fig. 7 is a cutaway view, shows temperature sensor mounted another embodiment at the cast gate place of air injection machine.
Fig. 8 A is the sectional elevation that is used for the mould of Gravity casting machines.
Fig. 8 B is the perpendicular cutaway view that is used for the mould of Gravity casting machines.
Fig. 9 A is the sectional elevation that is used for the mould of Gravity casting machines.
Fig. 9 B is the perpendicular cutaway view that is used for the mould of Gravity casting machines.
Figure 10 is the flow chart that is used to illustrate casting operation.
Figure 11 is a coordinate diagram, the deposite metal temperature is shown how changes.
The specific embodiment
(first embodiment)
Now, embodiments of the present invention will be described by referring to the drawings.
In Fig. 1 to Fig. 6, the air injection machine of reference number 1 expression first embodiment.Casting machine 1 is designed to the cylinder head (not shown) of casting motor engine in low-pressure casting process.As is known, casting machine 1 comprises smelting furnace 2, is arranged in the mould 3 and the following controller 4 with description of smelting furnace 2 tops, controller 4 is used to control the temperature of mould 3 and deposite metal 5, and operation to be opening and closing molding 3, and supply/stop supplies deposite metal 5 etc.The metal that is used for by casting machine 1 casting is an aluminium alloy.
Smelting furnace 2 comprises and forms box-like and have the master unit 6 of upward opening; Be used to cover the lid 7 of the upward opening of this master unit 6; Be used to store the crucible 8 of deposite metal 5; And be attached to lid 7 and make its lower end immerse the stalk 9 in deposite metal 5 etc.The master unit 6 of smelting furnace 2 has the internal heater (not shown), and the deposite metal 5 that is used for heating crucible 8 reaches predetermined temperature, and is connected to pressue device 10.Be designed to make its pressue device that enters stalk 9 10 be connected to the connectivity port 6a that is formed in the master unit 6 by the tracheae (not shown) by the upper surface that inert gas is supplied in the master unit 6 with pressurization deposite metal 5.Will be in the temperature of controller 4 controls described below from the moulding pressure and the heater of pressue device 10.
In the casting process of casting machine 1, identical with the conventional cast machine, under the clamped situation of mould 3, pressue device 10 is with the internal pressurization of the master unit 6 of smelting furnace 2.In casting process, the inside of pressurization master unit 6 forces deposite metal 5 upwards to enter stalk 9 from crucible 8 and enters the mould 3 that is positioned at stalk 9 tops then.
Shown in Fig. 2 A and 2B, mould 3 comprises patrix 11 and counterdie 12, and supports (see figure 1) by driver element 13.Patrix 11 has the die cavity 14 that is formed with under shed, and is attached to the platen 15 of driver element 13.Die cavity 14 refers to be used to form fabrication portion recessed of foundry goods.Platen 15 is supported on the matrix 16 of driver element 13 to move by tie-rod 17 up/down, can move by upward/downward movement engine 15a up/down thus.By controlling the rotation of upward/downward movement engine 15a at controller 4 described below.
Counterdie 12 has the die cavity 18 that is formed with upward opening, and is fixed on the matrix 16 by supporting member 19.Counterdie 12 and patrix 11 are provided with the heater (not shown), are used for they are preheated to the temperature of preparing casting; With the water cooling plant (not shown), be used for keeping mold temperature at casting process.Controller 4 control heater temperature and opening/closing water cooling plant.
Shown in Fig. 2 A, 2B and 3, form the running channel 21 that extends to opposite side from a side of die cavity 18 at the interior bottom portion place of counterdie 12, and the cast gate 22 that extends downwards from the bottom of running channel 21.
Shown in Fig. 2 B, cast gate 22 is formed on the place, bottom of counterdie 12, has elliptical shape when making from top observation, sets up drafting angle by boring and makes the opening diameter of cast gate 22 become gradually towards the top greatly, as shown in Figure 3.Be used to prevent that metal cloth filter 23 that impurity enters mould 3 inside is installed to the opening of cast gate 22 upper ends.The bottom of cast gate 22 is connected to the top of the cup 24 that is arranged in the supporting member 19.
Cup 24 in the vertical directions pass supporting member 19.From the supply deposite metal 5, top of stalk 9 (see figure 1)s, the top of stalk 9 contacts with the bottom surface of supporting member 19.More specifically, in casting process, deposite metal 5 flows into the cast gate 22 by cup 24 from stalk 9, and from this cast gate 22, deposite metal 5 enters running channel 21 by filter 23 and enters die cavity 14,18 with supply.{ product section 25 (see figure 3)s } are solidified in deposite metal 5 beginnings of filling mould 3 in this way in die cavity 14,18.Along with time lapse, the zone of solidifying of deposite metal 5 expands to the cast gate 22 from running channel 21.
As shown in Figure 3, the temperature sensor 26 that is used to detect the temperature of deposite metal 5 is installed to counterdie 12.As shown in Figure 4, temperature sensor 26 comprises sacrificial metal device 28, and sacrificial metal device 28 comprises: the protection part 26a that in the vertical direction extends; Form the support section 26b of an individuality with protection part 26a at the cardinal extremity place that protects part 26a; Axially pass the through hole 27 of sacrificial metal device 28.Temperature sensor 26 also comprises the thermocouple that inserts in the through hole 27.Temperature sensor 26 is coupled in the installing hole 30 that bores in counterdie 12.
As shown in Figure 3; installing hole 30 is made up of small diameter portion 30a that has opening in running channel 21 and the major diameter part 30b that has towards the opening of mould external orientation; protection part 26a is installed among the small diameter portion 30a, and support section 26b is installed among the major diameter part 30b.In addition, installing hole 30 is drilled to and makes it open at mould that (vertical direction among Fig. 3) extends through counterdie 12 on the direction, and near cast gate 22 1 sides in the counterdie 12.In other words, as the result who temperature sensor 26 is inserted installing hole 30, temperature sensor 26 is positioned at deposite metal 5 and solidifies the position that is later than die cavity 14,18 places.
As shown in Figure 4, be installed in the moving of sacrificial metal device 28 that support section 26b among the major diameter part 30b does not allow to be installed to counterdie 12, they can not be from the position shown in the figure further toward mould 11 inner insertions thus.Sacrificial metal device 28 and counterdie 12 are manufactured from the same material.In first embodiment, hot-die is used alloy tool steel (SKD).
The length that is installed in the installing hole 30 with support section 26b of sacrificial metal device 28 is designed to make the top of temperature detection part 28a or sacrificial metal device 28 to be projected in the running channel 21.Temperature detection part 28a forms as shown in Figure 4 has the external diameter that diminishes gradually towards the top.In other words, temperature detection part 28a forms drafting angle or tapering.
In first embodiment, temperature detection part 28a has the dome shape tip portion 28b that raises up, and the top separately of two types of conductor 29a, 29b of thermocouple 29 is welded to tip portion 28b.More specifically, the top end face separately of conductor 29a, 29b that passes through hole 27 together welds come occlusion of openings with the welding electrode that utilizes common material (alloy tool steel (SKD) that is used for hot-die) to make with them to the opening of tip portion 28b.The opening of welding is polished into dome shape then.
Use known alumel-chromel thermocouple 29 commonly used.It comprises two types conductor 29a, 29b, and they are by being soldered to the mutual conducting of tip portion 28b.The temperature of the contacted deposite metal 5 of tip portion 28b (thermocouple 29 is welded on here) of thermocouple 29 allowable temperature sensors, 26 detections and sacrificial metal device 28 (protection part 26a) is set in this way.
Pass protection part 26a is introduced to counterdie 12 to two conductor 29a, the 29b of support section 26b outside.Their stainless steel pipes 31 by being soldered to support section 26b be connected internally to controller 4.In the temperature sensor 26 of first embodiment, fireproof heat-insulating powder 32 is filled in the through hole 27 around conductor 29a, 29b.For fireproof heat-insulating powder 32, for example can be the magnesia (MgO) that is used for the glow plug of Diesel engine.
As shown in Figure 1, controller 4 comprises deposite metal temperature controller 33, mold temperature controller 34, moulding pressure controller 35 and casting condition adjuster 36.
The temperature of the heater of deposite metal temperature controller 33 control smelting furnaces 2 is to be heated to predetermined temperature with the deposite metal in the crucible 85.Each mould of 36 pairs of uses of casting condition adjuster of Miao Shuing is determined the temperature of deposite metal 5 after a while.
The heater in the mold temperature controller 34 control moulds 3 and the temperature of cooling device are to be heated to predetermined temperature with mould 3.Casting condition adjuster 36 is determined the temperature of each mould 3 of use.
Moulding pressure controller 35 opening/closing pressue devices 10 are controlled simultaneously from the gas flow of pressue device 10 supply, make the delivery rate that supplies to the deposite metal 5 the mould 3 from crucible 8 equal set rate.Each mould of 36 pairs of uses of casting condition adjuster is determined predetermined delivery rate.
By casting condition adjuster 36, according to each mould that is used for casting process, the data relevant with casting condition, for example delivery rate of mould and deposite metal temperature, pressurization and setting time and deposite metal 5 etc. all is sent to deposite metal temperature controller 33, mold temperature controller 34 and moulding pressure controller 35.Casting condition adjuster 36 output is used for the startup/stop signal of moulding pressure controller 35, thereby starts/stop the deposite metal 5 of pressurizeing with each scheduled time.Casting condition adjuster 36 is also exported the mould that is used for driver element 13 and is opened/clamping signal, thus with the scheduled time respectively up/down move patrix 11.
In the middle of these startup/stop signals and mold cramping/opening signal, when the temperature that detects with temperature sensor 26 reaches predetermined temperature T1, T2, send respectively and stop and mould opening signal (see figure 6).Temperature T 1 is the optimum temperature that is used to finish pressurization deposite metal 5, it is pre because solidifying in the top of product section, running channel part and cast gate, deposite metal 5 in them does not have flowability, and still there is flowability the deposite metal 5 of top on stalk 9 one sides from cast gate simultaneously.
In other words, temperature T 1 is predetermined to be such maximum: even pressue device 10 stops pressurization, only the deposite metal 5 on the side under the top that is positioned at cast gate of stalk 9 is towards crucible 8 one side direction current downflow.As shown in Figure 3, in first embodiment, the top that temperature T 1 is pre filter 23 can be retained in the foundry goods.The temperature T 2 that is lower than temperature T 1 is the optimum temperatures that are used to open mould, and it is predetermined to be such maximum, and this deposite metal, maximum place 5 fully is frozen into unalterable foundry goods shape and size when promptly opening mould.
Even the casting condition adjuster 36 of first embodiment be designed to cause owing to some faults temperature sensor 26 can not the condition of detected temperatures T1, T2 under, also can produce flawless product.In other words, casting condition adjuster 36 is designed under the situation that temperature sensor 26 lost efficacy, determine to finish time of pressurization deposite metal 5 and the time of determining to open mould based on the time (pressurization and setting time) rather than by the temperature that temperature sensor 26 detects.
More specifically, it is under faulty goods or the out of order situation that casting condition adjuster 36 is designed at temperature sensor 26, finishes the pressurization of deposite metal 5 when 5 pressurization begins through predetermined pressing time from the deposite metal.Casting condition adjuster 36 also is designed to open mould when beginning is finished in 5 pressurization through predetermined setting time from the deposite metal.
Refer to pressing time from the time point that begins to supply deposite metal 5 to the deposite metal 5 solidify the cycle that the zone expands to the time point of cast gate 22.Be the type according to the mould 3 that uses this pressing time, and the temperature of the temperature of mould 3 and the deposite metal 5 in the crucible 8 obtains by calculating when beginning to supply deposite metal 5.Setting time refers to be used to make the foundry goods of mould 3 inside fully to solidify and can be in the required cycle of easy deformation after the pressurization of finishing deposite metal 5.This setting time is the type according to mould 3, obtains by calculating based on the temperature of mould 3 when finishing the pressurization of deposite metal 5.These pressurizations and setting time can be stored in conduct table in the memory (not shown) in advance, and read from memory as required.
Next with reference to figure 5 and 6, describe the aforementioned operation of casting machine 1 in detail in conjunction with the further detailed construction of controller 4.One-period (once) in the foundry work that repeats has only been described herein.Therefore the hypothesis casting condition that is used for each mould 3 has been imported casting condition adjuster 36, and the temperature of mould 3 and deposite metal 5 has reached the target casting temperature.The input of casting condition is to finish by given predetermined value is input to the performing a programme that is used for each mould 3.
For example start the foundry work of the clamped casting machine 1 of mould wherein 3 by the starting switch (not shown) of outwarding winding.When starting switch was outwarded winding, the casting condition adjuster determined at first whether the Current Temperatures of mould 3 and deposite metal 5 is being used to produce in the scope of no defective product, shown in the step S1 among Fig. 5.The scope that is used to produce no defective product refers to that foundry goods can become the temperature range of no defective product, and it is scheduled to for each mould.If whether, perhaps aforementioned temperature drops on and is used to produce outside the scope of no defective product, and then process proceeds to step S2, and carries out alarm procedure, and wherein casting condition adjuster 36 is given the prompting of operator's temperature anomaly.This causes stopping casting operation.
If within this scope, then casting condition adjuster 36 calculates the pressing time (step S3) of deposite metal 5, and this is very important for carry out casting process under temperature sensor 26 inoperable situations.Then in step S4, casting condition adjuster 36 sends to moulding pressure controller 35 with enabling signal with the data of the delivery rate that is used for deposite metal 5.The enabling signal that is sent to moulding pressure controller 35 in this way causes that pressue device 10 is fed to inert gas in the smelting furnace 2, and the deposite metal 5 of pressurization is fed to the mould 3 by cup 24, cast gate 22 and filter from stalk 9.The part of the filling die cavity 14,18 of deposite metal 5 is at first solidified in the product section 25 in die cavity 14,18.Through certain hour, the zone of solidifying of deposite metal 5 extends to cast gate 22 downwards from running channel 21.In addition, when pressue device 10 began to pressurize as mentioned above, the timer (not shown) also started simultaneously.
After this, in step S5, the casting condition adjuster uses the temperature sensor 26 in the counterdie 12 to detect the temperature of the deposite metal 5 in the running channel 21.As shown in Figure 6, the temperature (after beginning to supply deposite metal 5) after the casting beginning that detects with temperature sensor 26 increases suddenly, and remain unchanged within a certain period of time then (along with flowing in running channel 21 in deposite metal 5) reduces afterwards gradually.In step S6, casting condition adjuster 36 compares temperature sensor 26 maximum temperature that detects and the temperature range of being scheduled to.If maximum temperature drops in the predetermined temperature range, then casting condition adjuster 36 is determined temperature sensor 26 operate as normal.On the contrary, if maximum temperature drops on outside the predetermined temperature range, then it determines that temperature sensor 26 does not have operate as normal (being in abnormality).
Determine that in step S6 temperature sensor 26 is under the situation of abnormality, when the elapsed time of timer indication reached the pressing time of obtaining among the step S3, casting condition adjuster 36 sent stop signal to moulding pressure controller 35.Moulding pressure controller 35 receives stop signal then, and it causes pressue device 10 stop supplies inert gases, finishes the pressurization (step S7) of deposite metal 5 thus.Roughly identical with the time of stop supplies deposite metal 5, casting condition adjuster 36 calculates setting time (step S8) based on the Current Temperatures of mould 3.
After the stop supplies deposite metal 5, the not frozen metal 5 in the mould flows back into crucible 8 from cast gate 22 by cup 24 and stalk 9 in step S7.Further solidify in the absence that does not have the heat supply deposite metal 5 (flowability) that is retained in the mould 3, and its hardness increases (step S9).When finishing the pressurization of deposite metal 5, start the timer (not shown).
Then, after the time by the timer indication reached setting time, casting condition adjuster 36 sent the mould opening signal to driver element 13.Then, driver element 13 receives the mould opening signal, and it causes that patrix 11 moves up to open mould (step S10 to S11).
If in step S6 for being or definite temperature sensor 26 operate as normal that then in step S12, casting condition adjuster 36 serviceability temperature sensors 26 detect the temperature of the deposite metal 5 in the running channel 21.The temperature that detects with temperature sensor 26 changes as shown in Figure 6.After reaching maximum temperature, along with further solidifying it and reduce gradually in deposite metal 5.When the temperature that detects with temperature sensor 26 drops to predetermined temperature T1 (step S13), casting condition adjuster 36 sends stop signal to moulding pressure controller 35.Moulding pressure controller 35 receives stop signal then, and it causes that pressue device 10 stops the inert gas supply, finishes the pressurization (step S14) of deposite metal 5 thus.
When finishing the pressurization of deposite metal 5, not solidified metal 5 rolls back in the crucible 8, and does not have mobile deposite metal 5 to be retained in the mould 3.Further solidify the deposite metal 5 of this reservation, because there is not the heat supply, its temperature further reduces.Casting condition adjuster 36 serviceability temperature sensors 26 continue to detect the temperature of the deposite metal 5 in the running channel part, shown in step S15, S16.When the temperature of the deposite metal of detecting with temperature sensor 26 5 dropped to predetermined temperature T2, casting condition adjuster 36 was determined to finish and is solidified and send the mould opening signal to driver element 13.
Driver element 13 receives the mould opening signal in this way, and it causes that patrix 11 moves up to open mould (step S11).The one-period of foundry work finishes.When mould is opened, move up with patrix 11 or foundry goods is retained under any situation in the counterdie 12 at foundry goods, when foundry goods when counterdie 12 separates, the temperature detection part 28a of temperature sensor 26 can easily remove from foundry goods.This is because the temperature detection part 28a of temperature sensor 26 forms drafting angle or tapering.As mentioned above, comprise that the sacrificial metal device 28 of temperature detection part 28a and thermocouple welding portion by making with the mould identical materials, provide the excellent abrasive energy thus.Therefore this prevents that these parts from being worn and torn by foundry goods.
As above Gou Zao air injection machine 1 serviceability temperature sensor 26 directly detects the temperature (temperature of deposite metal 5, herein deposite metal 5 solidify the deposite metal 5 that be later than die cavity 14,18 places) of deposite metal 5 near the boundary between cast gate 22 and the running channel 21.Finish to the pressurization of deposite metal 5 or with mould when thus, air injection machine 1 can reach optimum temperature in the temperature of foundry goods and open.Can minimize the pressing time that is used for deposite metal 5 and setting time (finish to mould open from pressurization) to foundry goods thus is the required time of no defective product.Therefore reduce time casting cycle, thereby further improved productivity ratio.
The temperature detection part 28a that is used in the temperature sensor 26 in the casting machine 1 of first embodiment is formed with drafting angle or tapering, and opens at mould from the inner wall surface of counterdie 12 that projection enters mould 3 on the direction.Therefore, temperature sensor 26 can detect the temperature of the deposite metal 5 that is arranged near the running channel 21 the product section 25, and allows easily to remove temperature detection part 28a from foundry goods behind casting process.Therefore, open or foundry goods during from mold separation at mould, temperature sensor 26 has avoided temperature detection part 28a to damage, and simultaneously can high accuracy detects the temperature of deposite metal 5.
In the casting machine 1 of first embodiment, be positioned at the outside of the product section of foundry goods 25 near the zone of the boundary between cast gate 22 in the counterdie 12 and the running channel 21.Fill this regional deposite metal 5 therefore have with product section 25 in the temperature temperature about equally of deposite metal, and therefore in the mode identical substantially but slightly be later than product section 25 places and solidify with product section 25.The casting machine 1 serviceability temperature sensor 26 of first embodiment is to detect in the temperature near the deposite metal 5 in the zone of the boundary between cast gate 22 and the running channel 21.This means that the temperature that is detected by temperature sensor 26 equals the temperature of the product section of foundry goods 25.Therefore, can determine to finish with high accuracy to the time of deposite metal 5 pressurizations and the time of opening mould.In other words, be different from conventional situation, in casting machine 1, need not to prolong supply and setting time to adjust the temperature difference between temperature detection part and the product section 25.Therefore, cycle time can be reduced.In addition, in casting machine 1, can on product section 25, not stay the vestige of temperature sensor 26, therefore can produce qualified foundry goods.
The casting machine 1 of first embodiment directly detects the temperature of deposite metal 5, and determines to finish the time of deposite metal 5 pressurizations and the time of opening mould based on the temperature that is detected.Even beginning during casting process the temperature of mould 3 change, this has also guaranteed to finish the pressurization of deposite metal 5 in mode the most timely and open mould according to casting condition.Therefore, need not casting machine 1 and unnecessarily prolong or shorten pressurization and setting time to deposite metal 5, perhaps supply and setting time can be minimized to the casting required time of no defective product.This has further improved productivity ratio.
(second embodiment)
As shown in Figure 7, temperature sensor can be positioned at cast gate.This figure is a cutaway view, shows another example that temperature sensor is installed in the cast gate place of air injection machine.In the figure, represent with its shared separately reference number with assembly identical referring to figs. 1 to the described assembly of Fig. 6 or that be equal to, and under suitable situation, can not repeat detailed description.
Temperature sensor 26 shown in Figure 7 is mounted to counterdie 12 and temperature detection part 28a stretches out cast gate 22 from the one pleurapophysis.For fear of the deposite metal 5 compressing temperature detection part 28a that upwards flow in the cast gate 22, cast gate 22 places in counterdie 12 have formed projection 41.
Projection 41 forms and makes the part of periphery wall of cast gate 22 inwardly stretch out.In a second embodiment,, tilt, move closer to the center of cast gate 22 thus towards upside at the ora terminalis that stretches out on the side of projection 41 for the resistance that reduces as soon as possible when deposite metal 5 upwards flows into cast gate 22, to cause.Contact portion between projection 41 and the temperature detection part 28a has following structure, the latter half that wherein has the temperature detection part 28a of circular cross-section is assemblied among the recessed 41a on the upper surface that is formed on projection 41, has only exposed the first half of temperature detection part 28a thus.
The temperature detection part 28a of temperature sensor 26 is in the face of the inside of cast gate 22, and this allowable temperature sensor 26 directly detects the temperature of deposite metal 5 in the cast gate 22.Therefore, second embodiment also can reach the identical effect that is obtained with first embodiment.
(the 3rd embodiment)
Describe the embodiment that is applied to Gravity casting machines of the present invention in detail with reference to figure 8A, 8B to 11.
Fig. 8 A and 8B and 9A and 9B illustrate the mould that is used for Gravity casting machines, and wherein Fig. 8 A and 9A are cross-sectional planes, and Fig. 8 B and 9B are the perpendicular planes that cuts open.Figure 10 is the flow chart that is used to illustrate casting operation.Figure 11 is a coordinate diagram, illustrates how the deposite metal temperature changes.
Shown in Fig. 8 A and 8B and 9A and 9B, gravity casting die 51 comprises and forms first mould 52 and second mould of opening in the horizontal direction 53, and die cavity 54,55 and be positioned at rising head 56,57 on the die cavity.First mould 52 and second mould 53 are mounted to mould driver element (not shown), and mould clamps and opens by the mould driver element.
In the mould shown in Fig. 8 A and the 8B 51, deposite metal 5 is supplied to the die cavity 54,55 from rising head 56,57.Mould 51 shown in Fig. 9 A and the 9B has cast gate 58, and cast gate 58 is formed with opening upwards on rising head 56,57 1 sides.Used deposite metal 5 wherein to be supplied to the structure of die cavity 54,55 bottoms by running channel 59 from cast gate 58.In these moulds 51 each all has the temperature sensor 26 that is arranged in the rising head 56,57.
Temperature sensor 26 be used in being equal among first embodiment, and be mounted to first mould 52, wherein temperature detection part 28a opens on the direction interior side-wall surface projection from rising head 56 at mould.In other words, also in this example, temperature sensor 26 is positioned at deposite metal 5 than late position of solidifying, die cavity 54,55 places.As the situation of the mould 51 of Fig. 9 A and 9B, wherein cast gate 58 and running channel 59 are used to supply the bottom of deposite metal 5 to die cavity 54,55, and cast gate 58 can be provided with temperature sensor 26, shown in the dotted line among Fig. 9 B.
Gravity casting machines with the mould 51 of constructing is as mentioned above controlled in mode shown in Figure 10 by the controller (not shown).More specifically, among the step P1 in the flow chart of Figure 10, controller is determined whether the Current Temperatures of mould 51 and deposite metal 5 drops on and is used to produce in the scope of no defective product.The scope that is used to produce no defective product refers to that foundry goods can become the temperature range of no defective product, and it is scheduled to each mould.If be not defined as not or aforementioned temperature drops on and is used to produce outside the scope of no defective product, process proceeds to step P2 and carries out alarm procedure, and its middle controller provides the prompting of temperature anomaly to the operator.This causes stopping of casting operation.
If in temperature range, then Gravity casting machines uses deposite metal feeding mechanism (not shown) to wait and supplies deposite metal 5 (casting) to fill mould 41 (step P3).In casting place, controller calculates the setting time of deposite metal 5, and this is essential for the casting program that is used to carry out use under the situation of temperature sensor 26 cisco unity malfunctions.Simultaneously, start timer.
As mentioned above, after being fed to deposite metal 5 in the mould 51, controller serviceability temperature sensor 26 detects the temperature of the deposite metal 5 in rising head 56,57 or the cast gate 58, as shown in step P4.The temperature that detects with temperature sensor 26 begins (casting beginning) and increases suddenly afterwards at casting process, remain unchanged within a certain period of time then, and reduce gradually afterwards, as shown in figure 11.Afterwards, in step P5, if the maximum temperature that detects with temperature sensor 26 drops in the predetermined temperature range, then controller 4 is determined temperature sensor 26 operate as normal.On the contrary, if maximum temperature drops on outside the predetermined temperature range, determine that then temperature sensor 26 does not have operate as normal (in abnormality).
If determine that in step P5 temperature sensor 26 is in abnormality, then controller is in stand-by state and reaches the setting time of obtaining among the step P3 (step P6) up to the elapsed time by the timer indication, and sends the mould opening signal afterwards to the mould driver element.The mould driver element receives the mould opening signal in this way then, and it causes that mould opens (step P7).
If in step P5, be sure or temperature sensor 26 working properly, then in step P8, controller serviceability temperature sensor 26 detects the temperature of deposite metal 5.
The variations in temperature that detects with temperature sensor 26 as shown in figure 11.After reaching maximum temperature, along with further solidifying it and reduce gradually in deposite metal 5.When the temperature that detects with temperature sensor 26 drops to predetermined temperature T3 (step P9), controller uses the mould driver element to open mould (step P7).Temperature T 3 is predetermined to be such maximum, fully solidifies in this deposite metal, maximum place 5 to open Shi Buhui at mould to change the foundry goods shape and size.In this way, mould is opened, and it causes finishing the foundry work of one-period.As the temperature detection part 28a of temperature sensor 26 during from first mold separation, the temperature detection part 28a of temperature sensor 26 can easily remove from foundry goods, because temperature detection part 28a is formed with drafting angle or tapering after casting process finishes.
Thus, the Gravity casting machines serviceability temperature sensor 26 that has the mould 51 of second embodiment directly detects the temperature of deposite metal 5 and the time of determining to open mould based on the temperature of this detection.This has guaranteed that mould 51 is opened in mode the most timely according to the condition of casting, even the temperature of mould 51 changes when casting process begins.
Therefore, in this Gravity casting machines, do not need unnecessarily to prolong or shorten the setting time that is used for deposite metal 5, perhaps setting time can be minimized to and make foundry goods become the required time of no defective product.This has further improved productivity ratio.
Industrial applicability
The present invention can be applied to for casting such as car engine, marine engine or other utility engines The casting machine of cast component of cylinder head and so on.

Claims (11)

1. casting machine, comprise the temperature sensor that is used for detected temperatures, described temperature is used to the control operation time, wherein said temperature sensor is arranged in the such position of mould: the time that solidify the deposite metal of this position is later than the time that solidify at the die cavity place of described mould, the direct contact melting metal of the temperature detection part of described temperature sensor.
2. casting machine according to claim 1, the wherein said operating time is the time that the deposite metal supply stops.
3. casting machine according to claim 1, the wherein said operating time is the time that described mould is opened.
4. casting machine according to claim 1, the temperature detection part of wherein said temperature sensor have the tapering that constitutes drafting angle, and open on the direction at mould and to enter described mould from mould inner wall surface projection.
5. casting machine according to claim 4, wherein said casting machine is an air injection machine, and the position on the described temperature detection part of described temperature sensor border between cast gate and the running channel near counterdie.
6. casting machine according to claim 1, wherein said casting machine is an air injection machine, and the position on the described temperature detection part of described temperature sensor border between cast gate and the running channel near counterdie.
7. casting machine according to claim 6, wherein be provided with controller, be used for when the temperature by the described deposite metal that described temperature sensor detected reaches predetermined temperature, finish the pressurization of described deposite metal, and be used for when the temperature by the described deposite metal that described temperature sensor detected reaches predetermined temperature, open described mould.
8. casting machine according to claim 1, wherein said casting machine is a Gravity casting machines, and the described temperature detection part of described temperature sensor is set in the rising head of described mould, and controller is set wherein, be used for when the temperature by the described deposite metal that described temperature sensor detected reaches predetermined temperature, open described mould.
9. casting machine according to claim 1, wherein said casting machine is a Gravity casting machines, and the described temperature detection part of described temperature sensor is set at the cast gate place of described mould, and controller is set wherein, be used for when the temperature by the described deposite metal that described temperature sensor detected reaches predetermined temperature, open described mould.
10. casting machine according to claim 1; wherein said temperature sensor comprises: have the sacrificial metal device of pattern draft or tapering along the top and insert in the described sacrificial metal device and thermocouple that the top is connected with described sacrificial metal device, described temperature sensor is mounted to described mould according to the mode that the described top of described sacrificial metal device is projected in the casting space in the described mould.
The inner wall surface from described mould is projected into the described casting space on the direction 11. casting machine according to claim 10, the top of wherein said sacrificial metal device are opened at mould.
CNB2005800029901A 2004-01-21 2005-01-20 Casting machine CN100400202C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102928104A (en) * 2012-08-13 2013-02-13 江苏三环实业股份有限公司 Temperature measurement device of paste mixing machine

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100757582B1 (en) 2006-06-08 2007-09-12 현대자동차주식회사 Device and method for manufacturing alloy wheel
US7941906B2 (en) * 2007-12-31 2011-05-17 Schlumberger Technology Corporation Progressive cavity apparatus with transducer and methods of forming and use
CN102192797B (en) * 2011-04-14 2012-11-14 西北工业大学 Smelting temperature measuring device for directional solidification
EP2578333A1 (en) * 2011-10-07 2013-04-10 Nemak Linz GmbH Method for controlling a casting assembly
CN103341599A (en) * 2013-06-28 2013-10-09 常州午阳柴油机水箱制造有限公司 Horizontal casting machine and method for using same
JP6331642B2 (en) * 2014-04-22 2018-05-30 日産自動車株式会社 Method for producing aluminum alloy castings
CN105880519B (en) * 2016-06-21 2017-11-10 王仙寿 Die casting for compressor of air conditioner cylinder body
CN108856679A (en) * 2018-08-14 2018-11-23 昆山拓卡家居用品有限公司 A kind of low-pressure casting method of aluminum alloy car wheel
KR101963363B1 (en) * 2018-09-19 2019-03-28 명화공업주식회사 Product quality automatic inspection system of counter pressure casting
CN111906275A (en) * 2020-07-06 2020-11-10 合肥工业大学 Extrusion casting die and device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61135470A (en) * 1984-12-05 1986-06-23 Toyota Motor Corp Low pressure casting device
JPH0994653A (en) * 1995-09-29 1997-04-08 Kobe Steel Ltd Low pressure casting apparatus and low pressure casting method
CN1189113A (en) * 1995-04-03 1998-07-29 西门子公司 Device for early detection of run-out in continuous casting
CN2514952Y (en) * 2001-12-19 2002-10-09 中国科学院金属研究所 Temperature field automatic collection device of single crystal high temperature directional solidification process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4274788B2 (en) * 2002-12-16 2009-06-10 富士重工業株式会社 Gravity casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61135470A (en) * 1984-12-05 1986-06-23 Toyota Motor Corp Low pressure casting device
CN1189113A (en) * 1995-04-03 1998-07-29 西门子公司 Device for early detection of run-out in continuous casting
JPH0994653A (en) * 1995-09-29 1997-04-08 Kobe Steel Ltd Low pressure casting apparatus and low pressure casting method
CN2514952Y (en) * 2001-12-19 2002-10-09 中国科学院金属研究所 Temperature field automatic collection device of single crystal high temperature directional solidification process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102928104A (en) * 2012-08-13 2013-02-13 江苏三环实业股份有限公司 Temperature measurement device of paste mixing machine

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TW200600230A (en) 2006-01-01
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KR20060121935A (en) 2006-11-29
BRPI0506946A (en) 2007-06-12

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