JPH08192259A - Riser pressure control device - Google Patents

Abstract

PURPOSE: To provide a riser pressure control device capable of further improving the feedability of the molten metal by the riser by pressurizing the molten metal in a riser cavity toward a product cavity at an appropriate timing. CONSTITUTION: A sensor 5 detects the temperature TA0 on the skin metal side in the lower region of a product cavity 2, a sensor 6 detects the temperature TB0 on the skin metal side in the upper region of the product cavity 2, and a sensor 7 detects the temperature TC0 on the skin poured in a product cavity 3. The detected temperature is converted into the inner temperature TA in the lower region of the product cavity 2 based on the temperature TA0 . The detected temperature is converted into the inner temperature TB in the upper region of the product cavity 2 of a casting mold 1 based on the temperature TB0 . The detected temperature is converted into the inner temperature TC of the riser cavity 3 based on the temperature TC0 . When the temperature of the riser and the temperature of the riser cavity satisfy the pressurization starting condition, the pressurization starting signal is outputted by a control device 9 to operate a driving circuit 85, drive a driving source 83 and advance a pressurizing body 81 in the K1 direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeder pressure control device which can enhance the feeder effect and is advantageous for reducing casting defects.

[0002]

2. Description of the Related Art Conventionally, a casting die has a feeder cavity for forming a feeder. The riser is designed so that the end time of solidification is delayed compared to the product cavity,
It has the effect of supplying good molten metal to the product cavity at high temperature. Therefore, the riser is effective in preventing casting defects such as shrinkage of castings and internal defects.

Further, as disclosed in Japanese Patent Laid-Open No. 61-78553, in order to further secure the effect of the feeder, a casting die equipped with a heating core is used for the feeder, and the molten core is directionally solidified by the heating core. Techniques for achieving this are known. Further, in the field of casting Al-based castings, a technique is known in which a pressure pin is used and the molten metal injected into the cavity of the casting mold is pressurized by the pressure pin. This technique is advantageous for preventing internal defects such as blow in a cast product and for densifying.

[0004]

By the way, the above-mentioned feeder requires a considerable head pressure in order to obtain the effect of supplying molten metal, and therefore the feeder volume tends to be large. Furthermore, in casting, the casting conditions may fluctuate somewhat, such as fluctuations in the pouring temperature. The capacity of the feeder tends to be larger than necessary in order to secure the molten metal replenishment property by the feeder in order to cope with such fluctuations. As a result, a decrease in product yield is induced, which causes a cost increase.

Further, even if the feeder has the same volume, there is some variation in the feeder effect due to fluctuations in the pouring temperature.
Although the heating core is provided by the technique disclosed in Japanese Patent Laid-Open No. 61-78553, the feeder effect is not always sufficient. Also in the technique of pressurizing the molten metal with a pressurizing pin, it is not easy to select the timing of starting the pressurization, and if the timing is shifted, it is not always sufficient in terms of replenishment of the molten metal.

The present inventor has been made in view of the above situation, and its problem is to pressurize the molten metal in the feeder cavity at an appropriate timing to further enhance the molten metal replenishability by the feeder. An object of the present invention is to provide a feeder pressure control device that can contribute to the effect of the feeder.

[0007]

A feeder pressurizing control apparatus according to the present invention is a casting mold including a product cavity for forming a cast product and a feeder cavity for forming a feeder and communicating with the product cavity. A casting product temperature detecting means for directly or indirectly detecting the temperature of the metal injected into the product cavity of the casting mold, and a temperature of the molten metal injected into the feeder cavity of the casting mold directly or Feeder temperature detecting means for indirectly detecting, feeder pressurizing means for pressurizing the feeder when pressurization start condition is satisfied, feeder temperature detected by the feeder temperature detecting means, and casting temperature detection Pressure control means for activating the feeder pressurizing means to pressurize the feeder when at least one of the temperature of the metal of the product cavity detected by the means satisfies the pressing start condition. To do.

[0008]

According to the present invention, the molten metal is injected into the product cavity of the casting mold. At this time, the molten metal is also supplied to the feeder cavity. The molten metal is not particularly limited, and Al-based, Mg-based, Cu-based, Zn-based,
Known metals such as cast iron, cast steel, Pb, Sn, and Ti can be used.

The casting product temperature detecting means directly or indirectly detects the temperature of the metal injected into the product cavity of the casting mold. A temperature sensor can be adopted as a typical casting product temperature detecting means. In this case, the temperature of the metal in the product cavity may be directly detected. In addition, the temperature of the metal in the product cavity is estimated or calculated by detecting the mold temperature of the mold part that divides the product cavity or the skin metal part, and thus the temperature of the metal in the product cavity is indirectly detected. It may be in the form of. The number of casting temperature detecting means is not particularly limited.

The feeder temperature detecting means detects, directly or indirectly, the temperature of the molten metal injected into the feeder cavity of the casting die. A temperature sensor can be adopted as a typical feeder temperature detecting means. In this case, the temperature of the metal in the feeder cavity may be directly detected. In addition, the temperature of the metal in the product cavity is estimated or calculated by detecting the mold temperature of the mold part having the feeder cavity or the skin metal part, and thus the temperature of the metal in the feeder cavity is indirectly determined. It may be detected.

According to the present invention, at least one of the temperature of the feeder detected by the feeder temperature detecting means and the temperature of the metal of the product cavity detected by the casting temperature detecting means determines the pressurization start condition. When filling, the pressurizing control means drives the feeder pressurizing means to pressurize the molten metal forming the feeder. With such pressurization, the molten metal in the feeder cavity moves toward the product cavity and is supplied to the product cavity. As a result, a good molten metal replenishment effect is exhibited.

As the feeder pressurizing means, it is possible to employ a method of mechanically pressurizing with a pressurizing pin, a plunger or the like. A method of increasing the pressure, or a method of pressurizing the surface of the feeder by applying powder or air, inert gas or the like may be used.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual configuration diagram of the embodiment. The casting mold 1 is a mold for gravity casting, and includes a product cavity 2 that forms a cast product and a feeder cavity 3 that forms a feeder. The feeder cavity 3 is formed in the feeder mold portion 1x. The casting mold 1 is not limited to a mold, and may be a sand mold or another type of mold. The feeder cavity 3 is arranged above the product cavity 2 for supplying molten metal to the product cavity 2 and communicates with the product cavity 2.

The casting die 1 is equipped with a lower temperature sensor 5 and an upper temperature sensor 6 as casting temperature detecting means. The lower zone temperature sensor 5 detects the temperature TA _{0 of the} skin metal in the lower zone of the product cavity 2 of the casting mold 1, and has a case made of ceramics that directly contacts the molten metal. The upper zone temperature sensor 6 detects the temperature TB ₀ of the skin metal in the upper zone of the product cavity 2 of the casting mold 1, and has a similar ceramic case. Here, the upper region means above the lower region, and the specific position is not limited.

In the present embodiment, the region where the internal defect is likely to occur in the cast product is near the internal defect prediction portion shown in FIG. 1, that is, near the upper region of the product cavity 2. A feeder temperature sensor 7 as a feeder temperature detecting means is provided in the feeder mold portion 1x of the casting mold 1. The feeder temperature sensor 7 is a casting mold 1.
The temperature TC ₀ on the skin side of the metal injected into the feeder cavity 3 is detected, and it has a similar ceramic case.

The feeder pressurizing means 8 is provided with a pressing surface 80 facing the feeder cavity 3 and is movable in the directions of arrows K1 and K2, and a holding mechanism 82 for holding the pressing body 81.
And a drive source 83 that can move the holding mechanism 82 forward and backward in the directions of arrows K1 and K2, and a drive circuit 85 that controls the drive of the drive source 83. The drive source 83 may be a known drive mode such as hydraulic pressure, pneumatic pressure, or motor drive. The pressure body 81 can be formed of a heat resistant material such as heat resistant steel or ceramics.

Control device 9 functioning as pressurizing control means
Includes a temperature measuring unit 90, a control unit 92, a setting device 93, and a memory 94. The setter 93 has a set temperature T0, T1 or a set temperature T1, which will be described later and functions as a threshold value.
Data for setting T0 is set, and for example, a keyboard or potentiometer can be adopted. Therefore, the setter 93 determines that the set temperatures T0 and T1 functioning as thresholds.
Can function as a threshold value changing unit that changes according to the type of cast product.

Although not shown, the control unit 92 includes an input processing circuit, a control unit main body having a CPU, and an output processing circuit. Signals from the temperature sensors 5, 6, 7 are signal lines 9
It is input to the temperature measurement unit 90 via 0a to 90c, and further input to the control unit 92. The control signal of the control unit 92 is output to the drive circuit 85 via the signal line 92n. The controller 92 performs the following correction process. That is, calculation processing is executed based on the detected temperature TA ₀ of the skin metal injected into the lower region of the product cavity 2 detected by the lower region temperature sensor 5 and converted into the internal temperature TA of the lower region of the product cavity 2. To do. Further, the detected temperature TB _{0 of} the skin metal injected into the upper region of the product cavity 2 detected by the upper region temperature sensor 6
Based on the above, a calculation process is executed to convert it into the internal temperature TB of the upper region of the product cavity 2 of the casting mold 1.

Further, arithmetic processing is executed based on the detected temperature TC ₀ of the skin metal of the feeder cavity 3 detected by the feeder temperature sensor 7 to obtain the internal temperature T of the feeder cavity 3.
Convert to C. This is because of the following considerations.
That is, first, in the product cavity 2, the skin side that contacts the casting mold 1 solidifies before the inside. Therefore, the molten metal supply is not sufficient inside, so that the defect occurs inside the skin side. Secondly, the temperature inside the feeder is higher and the function of supplying molten metal by the feeder is higher than that on the skin metal side of the feeder which touches the feeder type portion 1x.

In the present embodiment, the Al-based molten metal is injected into the product cavity 2 of the casting mold 1 by gravity casting and filled. At this time, the feeder cavity 3 is also filled with the molten metal. The lower temperature sensor 5 is the product cavity 2 of the casting mold 1.
The temperature TA ₀ on the skin metal side in the lower region is detected. The upper zone temperature sensor 6 detects the temperature TB ₀ on the skin metal side of the upper zone of the product cavity 2 of the casting mold 1. The feeder temperature sensor 7
The temperature TC ₀ of the skin metal injected into the feeder cavity 3 of the casting mold 1 is detected.

Then, as described above, the control unit 92 executes the following arithmetic processing. That is, based on the detected temperature TA ₀ ,
A calculation process is executed to convert the internal temperature TA in the lower region of the product cavity 2. Further, a calculation process is executed based on the detected temperature TB ₀ to convert it into the internal temperature TB of the upper region of the product cavity 2 of the casting mold 1. Based on the detected temperature TC ₀ , arithmetic processing is executed to convert it into the internal temperature TC of the feeder cavity 3.

The control device 9 according to the present embodiment outputs the pressurization start signal when both the temperature of the feeder and the temperature of the metal of the product cavity 2 satisfy the pressurization start condition. As a result, the drive circuit 85 of the feeder pressurizing means 8 is operated to drive the drive source 83, thereby advancing the pressurizing body 81 in the arrow K1 direction. As a result, the pressurizing surface 80 at the tip of the pressurizing body 81 pressurizes the feeder in the feeder cavity 3. With such pressurization, the molten metal in the feeder cavity 3 moves to the product cavity 2 and is replenished. Therefore, a good molten metal replenishment effect is exhibited.

On the other hand, when the temperature of the feeder and the temperature of the metal in the product cavity 2 satisfy the pressurizing end condition, the controller 9
Outputs a pressurization end signal, and the drive circuit 8 of the feeder pressurizing means 8
5 is operated to drive the drive source 83, whereby the pressurizing body 81 is retracted in the direction of arrow K2, and the pressurization is completed. When the casting process is completed in this way, the cast product is released from the casting mold 1.

As described above, according to this embodiment, since the molten metal replenishment effect by the riser is easily exhibited, the occurrence of casting defects such as external shrinkage, internal shrinkage, and blow defects in the product cavity 2 of the casting mold 1 is reduced. This is avoided, which is advantageous for further reducing the defect rate. That is, according to this embodiment, the feeder effect is effectively achieved. Since the feeder effect is effectively achieved in this way, it is not necessary to increase the feeder volume excessively, thus improving the product yield.
It is advantageous for cost reduction.

By the way, the timing of starting the pressurization of the pressurizing body 81 is important. When the molten metal is not solidifying,
For example, even if pressure is applied when the liquid phase is too much, when the metal corresponding to the casting defect portion is solidified, the molten metal replenishment becomes insufficient, and an effective pressure effect cannot be expected. Similarly,
When the solidification of the molten metal progresses too much, for example, when the molten metal in the product cavity 2 is completely solidified, the same effective pressurizing effect cannot be expected. Unless an effective pressurizing effect is obtained, casting defects such as shrinkage cavities and blows in cast products cannot be efficiently reduced or avoided. It is presumed that pressurizing the pressurizing body 81 is effective when the solid phase and the liquid phase coexist in appropriate amounts.

Therefore, in this embodiment, a set temperature T0 is set as a temperature at which a good pressurizing effect is obtained, and a set temperature T1 (T1> T0) is set as a temperature at which a good pressurizing effect is not obtained. The set temperatures T1 and T0 may be stored in a memory 94 such as a RAM or a ROM provided in the control device 9 or may be set as a voltage signal in the potentiometer.

Taking the binary alloy of Al-Si shown in FIG. 6 as an example, the set temperature T1 is in the region near the liquidus line M1 or in the region exceeding the liquidus line M1 on the higher temperature side. You can select the temperature. Set temperature T0 (Temperature T1> Temperature T0)
Can select the temperature in the region between the liquidus line M1 and the eutectic temperature M2. In the present embodiment, when the following items (1) to (4) as the pressurization start conditions are satisfied, it is determined that the pressurization has started.

T1>TC> T0 TB> T0 TA <T0 Further, in this embodiment, when the following items (1) to (4) as the pressurizing end conditions are satisfied, the pressurizing end is determined.

TA <T0 TB <T0 TA <T0 FIG. 2 shows a flowchart of a main routine executed by the control device 9 according to the present embodiment. As shown in FIG. 2, an internal timer is started in step S1. In step S3, it is determined whether the casting device is operating. If in operation, step S
In step 5, a predetermined flag and the like are initialized. If it is not in operation, the process proceeds from step S3 to step S17.

In step S7, a subroutine for inputting the temperature signals of the temperature sensors 5, 6, 7 is executed. Here, the average value of the number of samplings is adopted, and the data which is abnormally separated is omitted as abnormal data. In step S9, a subroutine for calculating the internal temperature from the detected temperature is executed. That is, from the temperature signal TA ₀ from the lower temperature sensor 5 to the internal temperature T of the lower region of the product cavity 2.
A is calculated, and from the temperature signal TB ₀ from the upper temperature sensor 6, the internal temperature TB of the upper region of the product cavity 2 is calculated.
Is calculated. Further, the temperature signal T from the feeder temperature sensor 7
The internal temperature TC of the feeder in the feeder cavity 3 is calculated from C ₀ .

In step S11, a pressurization start judgment processing subroutine for judging whether or not the pressurization start condition is satisfied is executed. In step S13, a pressurization end determination processing subroutine for determining whether or not the pressurization end condition is satisfied is executed. In step S15, a pressure driving processing subroutine is executed. In step S17, a shape correspondence processing subroutine is executed so as to adapt to the shape of the cast product. In step S19, an abnormality processing subroutine is executed, and when an abnormality is recognized, it is dealt with. Other processing is executed in step S21, and the process stands by until the internal timer expires in step S23. As a result, the time required for one routine becomes constant, which is advantageous for avoiding malfunction. When the internal timer ends, the process returns to step S1 to prepare for another casting.

FIG. 3 shows a pressurization start determination processing subroutine executed by the controller 9. This routine functions as pressurization start determination means. As shown in FIG. 3, step S112
Then, it is determined whether the condition of T1>TC> T0 is satisfied. Y
If ES, the molten metal in the feeder cavity 3 is in an appropriate molten state, and it is determined that the molten metal can be supplied to the product cavity 2. Therefore, step S112 functions as a molten metal replenishment determining means for determining whether the molten metal can be replenished from the feeder to the product cavity 2.

In step S114, it is determined whether TB> T0. If TB> T0, it is determined that the temperature TB is appropriate and it is advantageous to reduce or avoid internal defects by replenishing the molten metal. On the other hand, if TB <T0, the temperature in the upper region of the product cavity 2 is too cold and solidifies too much. Therefore, even if the feeder is pressurized, the molten metal of the feeder is not sufficiently replenished to the defects such as shrinkage cavities, which is disadvantageous for correcting the defects such as shrinkage cavities.
Therefore, step S114 functions as an adequacy determining means for determining whether or not the molten metal supply to the cast product is appropriate.

If YES in step S114, the solidification of the upper region of the product cavity 2 is appropriate as described above.
Then, in step S116, it is determined whether TA <T0. If YES, pressurization is started. That is, in step S118, the pressurization start flag is set to 1 and the pressurization timer (Δt) is started. The pressurizing timer is a timer for pressurizing the feeder at a minimum for Δt time. Further, in step S120, it is determined whether or not the Δt time has elapsed. If the time has elapsed, the process proceeds to step S122 to set the pressurization start flag 0 and the pressurization completed flag to 1, and therefore the feeder has a minimum Δt time. It has been pressurized. In step S122, the pressurizing timer is also cleared and the process returns to the main routine.

If NO in steps S112, S114 and S116, it is determined that the pressurization start timing is inappropriate. Therefore, in step S128, the pressurization start flag is set to 0, and the process returns to the main routine. Here, the pressurization start flag is a flag for determining whether or not the pressurization operation by the pressurizing body 81 has been started. When the pressurization start flag is 1, control is performed in the pressurization drive processing subroutine (step S15). The device 9 commands the drive circuit 85 to send a pressurization start signal. When the pressurizing start flag is 0, the pressurizing operation is not started, that is, in the pressurizing drive processing subroutine (step S15), the control device 9 does not instruct the drive circuit 85 of the pressurizing start signal. This pressurization start flag is set to 0 by the above-mentioned initial setting.

The pressurized flag is a flag for determining whether or not pressure has been applied. When the pressurized flag is 1, it means that the feeder is pressurized for Δt time, and is set to 0 by the initial setting. Set. FIG. 4 shows a pressurization end determination processing subroutine executed by the control device 9. This routine functions as a pressurization end determination means. As shown in FIG. 4, in step S132, it is determined whether the pressurized flag is 1 or 0. If the pressurization completed flag is 0, the pressurizing operation by the pressurizing body 81 has not been executed, so there is no need to determine the pressurizing end time, and therefore the process directly returns to the main routine. If the result of determination in step S132 is that the pressurization completed flag is 1, the pressurization operation by the pressurizing body 81 has been executed for Δt time, so it is necessary to determine the pressurization end time.

Therefore, the process proceeds to step S134, where TC <
Determine if it is T0. If YES, the process proceeds to step S136 to determine whether TB <T0. If YES, the process advances to step S138 to determine whether TA <T0. If YES, the pressurization end flag is set to 1 and the process returns to the main routine. Here, the pressurizing end flag is the pressurizing member 81.
Is a flag that determines whether or not the pressurizing operation by
When the pressurizing end flag is 1, the pressurizing operation is ended in the pressurizing drive process (step S15), and when the pressurizing end flag is 0, the pressurizing operation is not ended and the pressurizing is continued.

Further, steps S134 and S13
6. If the result of the determination in step S138 is NO, the pressurization end flag is set to 0 in step S142, and the process returns to the main routine. FIG. 5 shows a shape correspondence processing subroutine executed by the control device 9. This functions as a shape-corresponding means for changing the pressurizing form according to the shape of the cast product. As shown in FIG. 5, in step S172, it is determined whether or not there is a request. This request is made by the setter 93. If NO in step S172, the process directly returns to the main routine. If YES, step S
174, the reference value Tα, the value β, the value γ, the reference value Tκ,
Select the value λ and the value μ. The value of this is stored in a predetermined area of the memory 94 of the control device 9 and is appropriately selected according to the shape and type of the cast product.

Then, in step S176, the set temperature is changed to T1 ← (Tα + β + γ). Furthermore, set temperature T0
← Change to (Tκ + λ + μ) and return to the main routine. As described above, in this embodiment, the set temperatures T0 and T1 functioning as threshold values can be appropriately changed according to the product shape of the cast product. Therefore, it is possible to perform appropriate pressurization start determination processing and pressurization end determination processing according to the product shape of the cast product, so even if the cast product changes, the pressurizing effect is good and the feeder effect is secured. Is advantageous to.

(Other Examples) In the above-mentioned embodiment, it is assumed that the items (1) to (3) above are satisfied as the pressurizing start time, but the invention is not limited to this, and any two of and are satisfied. It may be time to start pressurizing. Further, in some cases, the pressurization start time may be set when any one of and is satisfied. Furthermore, the pressurization start time may be determined under other conditions. The flowchart can be changed according to the form.

Although the above items (1) to (3) are satisfied as the pressurizing end time, the pressurizing end time may be set when any two of and are satisfied. Further, in some cases, the pressurization start time may be set when any one of and is satisfied.
Furthermore, the pressurizing end time may be determined under other conditions. The flowchart can be changed according to the form.

The number of temperature sensors is not limited to the above example, and can be appropriately selected as needed. Although the temperature sensor is used as the temperature detecting means, the temperature may be indirectly detected by the viscosity or color of the molten metal of the feeder. Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and can be appropriately selected as necessary within the scope not departing from the gist.
For example, the present invention is not limited to gravity casting, and application to low pressure casting, and in some cases die casting and high pressure casting can be expected. However, in order to secure the effect of pressurization, it is presumed that the molten metal requires a relatively long solidification time.

(Supplementary Note) The following technical idea can be understood from the above-described embodiments. ○ A casting mold provided with a product cavity for forming a cast product and a feeder cavity for forming a feeder and communicating with the product cavity, and directly or indirectly the temperature of the metal injected into the product cavity of the casting mold. Temperature detecting means for automatically detecting the temperature of the casting, a feeder temperature detecting means for directly or indirectly detecting the temperature of the molten metal injected into the feeder cavity of the casting mold, and a feeder for pressing the feeder. Using pressure means,
Injecting molten metal into the cavity of the casting mold and the feeder cavity, and the temperature of the feeder detected by the feeder temperature detecting means,
When at least one of the temperature of the metal of the product cavity detected by the casting product temperature detection means satisfies the pressurization start condition, the feeder pressurizing means is activated to pressurize the feeder, and the molten metal of the feeder A method of casting, characterized in that the product cavity is replenished.

The pressurizing control means determines the pressurizing start time to start pressurizing the feeder and pressurizing end determining the pressurizing end time to end pressurizing the feeder. Apparatus and method provided with judging means. ○ Molten metal replenishment determining means for deciding whether or not molten metal can be replenished by a presser, and molten metal for pressurizing the molten metal of the presser to replenish the product cavity when the molten metal replenishment determining means determines that molten metal can be replenished. Apparatus and method comprising a pressurizing means.

An apparatus and method provided with suitability judging means for judging suitability of molten metal supply to a product cavity forming a cast product. An apparatus and method provided with threshold value changing means for changing the threshold value (set temperatures T0, T1) according to the type of cast product.

[0046]

According to the present invention, at least one of the feeder temperature detected by the feeder temperature detecting means and the metal temperature of the product cavity detected by the casting temperature detecting means is
When the pressurizing start condition is satisfied, the pressurizing control means drives the feeder pressurizing means to pressurize the feeder. With the pressurization, the molten metal in the feeder cavity is replenished to the product cavity in good timing, and a good molten metal replenishing effect is exhibited. Therefore, according to the present invention, in the product cavity of the casting mold, the occurrence of casting defects such as external drawing, internal drawing, and blow defects is reduced,
This is avoided, which is advantageous for further reducing the defect rate.

That is, according to the present invention, the feeder effect is effectively achieved. Since the feeder effect is effectively achieved in this way, it is not necessary to make the feeder volume excessive, and therefore the product yield is improved, which is advantageous for cost reduction.

[Brief description of drawings]

FIG. 1 is a configuration diagram according to an embodiment.

FIG. 2 is a flowchart of a main routine executed by a control device.

FIG. 3 is a flowchart of a subroutine of pressurization start determination processing.

FIG. 4 is a flowchart of a subroutine of pressurization end determination processing.

FIG. 5 is a flowchart of a subroutine of shape correspondence processing.

FIG. 6 is a state diagram of an Al—Si system.

[Explanation of symbols]

In the figure, 1 is a casting mold, 2 is a product cavity, 3 is a feeder cavity, 5 and 6 are temperature sensors (casting product temperature detecting means), 7 are feeder temperature sensors (feeding temperature detecting means), and 8 is a feeder. Hot water pressurizing means, 81 is a pressurizing body, and 9 is a control device (pressurizing control means).

Claims (1)

[Claims] 1. A casting mold having a product cavity for forming a cast product, a feeder cavity for forming a feeder and communicating with the product cavity, and a temperature of metal injected into the product cavity of the casting mold. A casting product temperature detecting means for directly or indirectly detecting, and a feeder temperature detecting means for directly or indirectly detecting the temperature of the molten metal injected into the feeder cavity of the casting mold, The feeder pressurizing means for pressurizing the feeder when the pressure start condition is satisfied, the temperature of the feeder detected by the feeder temperature detecting means, and the temperature of the metal of the product cavity detected by the casting temperature detecting means. And at least one of them is provided with a pressurizing control unit that operates the pressurizing unit to pressurize the presser when the pressurizing start condition is satisfied.