JP2007268614A - Method and apparatus for coating parting agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve releasing property by suitably performing the cool to a die with the coating of parting agent. <P>SOLUTION: While a lower die 1 and an upper die 3 for forge-forming processing are opened after form-processing, parting agent spraying nozzles 5 are arranged at intervals, and the parting agents are sprayed from respective spraying holes 9a-9e and 11a-11e toward respective portions 1a-1e and 3a-3e corresponding to the lower die 1 and the upper die 3. At that time, according to the detected temperature of a thermo-sensor 13 arranged in each portion 1a-1e and 3a-3e in the lower die 1 and the upper die 3, the spraying conditions, such as the spraying time and the spraying pressure of the parting agent, and the arrangement of the parting spray-nozzles 5, are changed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a release agent coating method and a release agent coating apparatus for applying a release agent to a mold for forging a forged product.

In general, in hot forging and warm forging, the temperature of the mold rises because the workpiece before forging is heated to a high temperature. At this time, the releasability of the forging from the mold In addition, in order to prevent the lubricity from being lowered and to cool the mold, a mold release agent is applied to the mold surface. For example, the thing of the following patent document 1 measures mold temperature, and controls the injection time and injection temperature of a mold release agent based on this measured temperature.
JP-A-4-294837

  By the way, for example, when forging a crankshaft or a connecting rod used in an automobile engine, a workpiece set between the recesses of a pair of molds is pressed to form a crankshaft or a connecting rod having a predetermined shape. However, at this time, compared with the vicinity of the bottom surface of the concave portion of the mold, the vicinity of the opening of the concave portion is rubbed against the mold while the work is being pressure-deformed, and thus the frictional resistance is large and the temperature is high.

  Thus, when performing forging molding processing, the temperature may be different for each part of the mold, and therefore, simply based on the temperature of the entire mold as in the conventional release agent coating apparatus described above. If the injection time and the injection temperature of the release agent are uniformly controlled over the entire mold, the release agent can be applied in an optimal state to both the high temperature portion and the low temperature portion. In other words, overcooling or insufficient cooling occurs for each part, and the mold is not properly cooled, resulting in deterioration of lubrication and mold release properties.

  Accordingly, an object of the present invention is to appropriately cool the mold by applying a release agent to improve lubrication and mold release properties.

  The present invention provides a release agent coating method in which a release agent is applied to a mold for forging a forged product, the application conditions of the release agent are changed for each part of the mold, and the release agent is The main feature is that it is applied to the mold.

  According to the present invention, since the application conditions of the mold release agent are changed for each part of the mold, overcooling and insufficient cooling for each part of the mold are prevented, and the mold is properly cooled. It is possible to improve the lubrication and release properties of the forged product from the mold.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front cross-sectional view of a release agent coating apparatus showing a first embodiment of the present invention. This mold release agent coating apparatus is forged when a forging process as shown in FIGS. 2 to 4 described later is performed between a lower mold 1 and an upper mold 3 as a mold for forging a forged product. In a state where the processed forged product is taken out from the mold, a release agent is injected from a release agent injection nozzle 5 as a release agent injection means onto the opposing surfaces of the lower die 1 and the upper die 3 whose temperature has been increased. Then, the lower die 1 and the upper die 3 are cooled to improve the releasability of the forged product after the next forging process.

  2 to 4 show a process of forging a forging 29 to be a connecting rod used in an automobile engine. FIG. 2 is a side view of the mold in an opened state, and FIG. FIG. 4 is an enlarged front cross-sectional view corresponding to the AA cross section of FIG. 2 in a state where the lower mold 1 is clamped after forging. 1 is different from the mold shape of FIGS. 2 to 4, but corresponds to the AA cross section of FIG. 2, that is, FIG. 4, and the part corresponding to FIG. 1 in FIG. 4. Are given the same reference numerals.

  Here, as shown in FIG. 2, the workpiece W heated to a high temperature is set on the recesses 10 of the recesses 10, 30 facing each other between the lower mold 1 and the upper mold 3. As shown in FIG. 4, the forged product 29 to be a connecting rod is forged and formed by clamping the two close together. At this time, burrs B are generated in the entire periphery of the forged product 29, but these burrs B are removed by post-processing.

  Note that the forged product 29 in FIG. 4 is not a final product (connecting rod) but, for example, a crankshaft insertion hole or the like is post-processed in the same manner as the burr B described above.

  In such a forging process, the flat portions 31 and 33 and the side portions 35 that serve as burrs for the lower die 1 and the upper die 3, particularly the portions 1a, 3a and 1e, 3e around the above-described burrs B, No. 37 is rubbed against each surface of the lower die 1 and the upper die 3 when the workpiece W is forged and deformed, so that a large frictional resistance is generated and the temperature is higher than that of other portions.

  1 and 4, the central portions 1c and 3c corresponding to the connecting rod esection (the portion between the large end portion and the small end portion) have the rising surfaces 39 and 41 on both sides thereof. Although the workpiece W is rubbed because the vertical length is short, the frictional resistance is not so high, and therefore the temperature is not as high as the above-described portions 1a, 3a and 1e, 3e.

On the other hand, the bottom portions 10a and 30a of the recesses 10 and 30 have side portions 35 and 37 and rising surfaces 39 and 41 to which the workpiece W is rubbed on both sides, but the friction resistance of the workpiece W against the bottom portions 10a and 30a itself is small. Therefore, the temperature is lowest as compared with the above-described parts 1a, 3a and 1e, 3e and parts 1c, 3c.
In this way, the release agent injection nozzle 5 for injecting the release agent to the lower mold 1 and the upper mold 3 having a temperature difference at each part after the forging is formed in the lower part of the nozzle body 7 in FIG. 1 are provided with injection ports 9a, 9b, 9c, 9d, and 9e for injecting the release agent toward the lower mold 1, respectively, along the horizontal direction in FIG. The injection ports 11a, 11b, 11c, 11d, and 11e for injecting toward each other are provided along the horizontal direction in FIG.

  Among these, the injection ports 9a, 9e and 11a, 11e at the left and right ends in FIG. 1 are directed to the hottest portions 1a, 1e and 3a, 3e in the lower mold 1 and the upper mold 3, respectively.

  Further, the injection ports 9b, 9d, 11b, and 11d adjacent to the injection ports 9a, 9e, 11a, and 11e, respectively, are located at the lowest temperature portions 1b, 1d, 3b, and 3d in the lower mold 1 and the upper mold 3, respectively. Each is oriented.

  Further, the central injection ports 9c and 11c are located between the highest temperature parts 1a, 1e and 3a, 3e in the lower mold 1 and the upper mold 3 and the lowest temperature parts 1b, 1d and 3b, 3d. It is directed to the portions 1c and 3c that are to be temperatures.

  And, from the injection ports 9a, 9e and 11a, 11e, the parts 1a, 1e and 3a, 3e having the highest temperature are strongly cooled, while from the injection ports 9b, 9d and the injection ports 11b, 11d, Weak cooling is performed on the low temperature portions 1b, 1d and 3b, 3d, and intermediate cooling is performed on the intermediate portions 1c and 3c from the central injection ports 9c and 11c.

  As described above, the degree of cooling (the release agent application condition) for the lower mold 1 and the upper mold 3 may be changed by, for example, changing the injection amount of the release agent. This is achieved by changing the injection time. That is, the injection pressure (time) is increased (longer) when strong cooling is performed, and the injection pressure (time) is decreased (shorter) when weak cooling is performed.

  Of course, when the temperature distribution is specified by the preliminary investigation, the injection port (the mist particle size of the release agent, the injection range, etc.) having different performance may be arranged in advance for each part. Here, the mist particle size and the injection range can be changed by appropriately changing the size, shape, injection pressure, and the like of the injection port.

At this time, the temperature sensors 13 as temperature detecting means are installed in the portions 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3, respectively, and the mold release is performed based on the detected temperatures of these temperature sensors 13. The agent applicator 15 adjusts the spraying pressure and spraying time of the coating agent. Each temperature sensor 13 and the release agent applicator 15 are connected by a wiring 19 embedded in the lower mold 1 and the upper mold 3. The release agent applicator 15 has a pump, a check valve, and the like. While providing the supply part 17, it connects with each injection port 9a-9e and 11a-11e individually by the piping 21, respectively, and the injection pressure and injection time of the mold release agent which are accommodated in the mold release agent storage tank which is not illustrated Is provided with a coating condition control circuit 23 as a coating condition control means for adjusting each of the spray ports 9a to 9e and 11a to 11e.

  Next, the operation will be described. After forging and forming the workpiece W shown in FIG. 2 between the lower mold 1 and the upper mold 3 as shown in FIG. 4, the mold release agent injection nozzle 5 is set in a state where the mold is opened as shown in FIG. Insert at an intermediate position between the lower mold 1 and the upper mold 3. In this state, the application condition control circuit 23 determines the injection pressure and the injection time of the release agent based on the temperatures of the portions 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3 detected by the temperature sensor 13, respectively. To control.

  Here, as described above, in the lower mold 1 and the upper mold 3, the portions 1a, 1e and 3a, 3e have the highest temperature. Therefore, in order to increase the injection amount from the injection ports 9a, 9e and 11a, 11e, Strong cooling is performed by increasing the injection pressure or extending the injection time. At this time, depending on the detected temperature, the injection pressure may be increased and the injection time may be extended.

  Further, since the temperatures of the parts 1b, 1d and 3b, 3d are the lowest, in order to reduce the injection amount from the injection ports 9b, 9d and 11b, 11d, the injection pressure is lowered or the injection time is shortened to perform weak cooling. Do. At this time, depending on the detected temperature, the injection pressure may be lowered and the injection time may be shortened.

  Further, for the portions 1c and 3c having an intermediate temperature, intermediate cooling is performed as an intermediate injection pressure or injection time so that the injection amount is an intermediate amount. At this time, depending on the detected temperature, the injection pressure may be an intermediate pressure and the injection time may be an intermediate time.

  As described above, the adjustment of the injection amount can also be realized by exchanging the injection ports (mist granularity, injection range, etc.) having different performances.

  Thus, in the first embodiment of the present invention, as the application condition of the release agent, at least one of the injection pressure, the injection time, and the specification of the injection port of the release agent is used as the lower mold 1 and Since it changes for each part in which temperature differs in upper mold 3 and it secures the injection quantity according to temperature, it prevents overcooling and insufficient cooling for each part of lower mold 1 and upper mold 3 The lower mold 1 and the upper mold 3 can be properly cooled, and the lubrication / release properties of the forged product 29 can be improved.

  In addition, by appropriately cooling the lower mold 1 and the upper mold 3, the amount of the release agent attached to the mold is reduced due to insufficient cooling, the release agent is burnt on the mold surface, and the mold is heated due to high temperature. It can prevent mold softening, reduce the amount of release agent adhesion due to insufficient evaporation of moisture in the release agent due to overcooling, occurrence of missing rough material due to puddles on the lower mold 1, gold due to rapid cooling Mold breakage and the like can be prevented.

  At this time, the injection ports 9a to 9e and 11a of the release agent injection nozzle 5 corresponding to the temperature measurement parts by the temperature sensors 13 installed in the parts 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3, respectively. ˜11e are arranged, respectively, so that cooling corresponding to the temperature of each of the parts 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3 can be efficiently performed and quantitatively measured by the temperature sensor 13 Temperature measurement becomes possible.

  FIG. 5 is a front cross-sectional view of a release agent coating apparatus showing a second embodiment of the present invention. In the second embodiment, a thermoviewer (thermography) 25 as a non-contact type temperature detecting means for measuring temperature in a non-contact manner is used in place of the temperature sensor 13 in the first embodiment shown in FIG. .

  The thermo-viewer 25 is installed in a pair on the left and right sides of the lower mold 1 and the upper mold 3, and infrared rays emitted from the mold surfaces including the respective parts 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3 are provided. The intensity is detected, and the temperature distributions of these parts 1a to 1e and 3a to 3e are displayed as images on a monitor screen (not shown).

  Moreover, in this embodiment, the temperature which correct | amends the temperature of each site | part 1a-1e and 3a-3e measured with the thermo viewer 25 in the position which mutually opposes in the right side edge part in FIG. 5 of the lower mold | type 1 and the upper mold | type 3. A correction temperature sensor 27 is installed as correction temperature detection means. The detection signals of the correction temperature sensor 27 and the thermo viewer 25 are input to the application condition control circuit 23 of the release agent applicator 15. Other configurations are the same as those of the first embodiment shown in FIG.

  Next, the operation of the second embodiment will be described based on the flowchart showing the control operation of the coating condition control circuit 23 shown in FIG. First, the temperature of each part 1a-1e and 3a-3e of the lower mold 1 and the upper mold 3 is measured by the thermo viewer 25, and the temperature of the lower mold 1 and the upper mold 3 is measured by the correction temperature sensor 27. Each of these measured temperatures is taken in by the coating condition control circuit 23 (step 101).

  Then, based on the acquired correction temperature, the temperatures of the parts 1a to 1e and 3a to 3e of the lower mold 1 and the upper mold 3 measured by the thermo viewer 25 are corrected (step 103). That is, the coating condition control circuit 23 includes a temperature correction unit. This is because when a forging process is continuously performed and a mold release agent is injected for each process, a spray-type mold release agent is scattered between the lower mold 1 and the upper mold 3 after injection. Since the thermo-viewer 25 measures the temperature different from the actual temperature due to the released release agent, the accuracy is lowered. Therefore, the temperature correction is performed in consideration of the influence of the released release agent. Is done.

  The temperature correction may be performed every forging process, but may be performed every several times, or may be performed every fixed time.

  Next, it is determined whether or not the corrected temperature is within the target optimum temperature range for each of the parts 1a to 1e and 3a to 3e of the upper mold 1 and the lower mold 3 (step 105). FIG. 7 shows the temperature course of a specific part in the upper die 1 and the lower mold 3 after the forging process. Here, if the temperature of the specific part is between t1 and t2, the optimum temperature range is shown. In this case, the release agent is injected with the normal injection pressure and the injection time (step 107). In this case, it is possible to ensure the releasability of the forged product after the next forging process by injecting the release agent with the normal injection pressure and the injection time.

  If the corrected temperature is out of the optimum temperature range in step 105, it is determined whether or not the upper limit temperature t2 is exceeded (step 109). When extending the injection time to the optimum temperature, whether the extended time is within the specified time that allows the workpiece to be inserted in the next processing after the release agent injection in the forging process that is performed at regular intervals Is determined (step 111).

  The determination in step 111 is, for example, an application condition control circuit that determines in advance the idle time from the release agent injection at the normal time without changing the injection time and the normal pressure without changing the injection pressure to the work input at the next processing. 23 is stored in a memory (not shown), and this free time is compared with the extended time.

  Here, when the extension time falls within a specified time during which the next workpiece can be introduced after injection of the release agent in the forging process performed at regular time intervals, that is, when the above-described idle time is longer than the extension time. Is changed so that the injection time of the release agent is lengthened (step 113), and the changed value is output to the release agent supply unit 17 as a drive output value, and each of the injection ports 9a, 9a, A release agent is injected from 9b, 9c, 9d, and 9e and the injection ports 11a, 11b, 11c, 11d, and 11e (step 115).

  If the corrected temperature does not exceed the upper limit value t2 of the optimum temperature range in step 109 described above, that is, less than the lower limit value t1 of the optimum temperature range, the injection time is shortened as compared with the normal time, Alternatively, the release agent is injected with the injection pressure lowered (step 116).

  Also, in the above-described step 111, if the above-mentioned extended time exceeds the injection time extension possible range, the optimum temperature cannot be reached even if the injection time is extended, so the injection pressure of the release agent is increased. However, it is determined whether or not the temperature can be lowered to the optimum temperature by the injection pressure changed at that time, that is, whether or not it is within the changeable range (step 117).

  Here, if the injection pressure of the release agent is within a changeable range, the injection pressure is changed so as to increase (step 119), and the changed value is output to the release agent supply unit 17 as a drive output value. A release agent is injected from each of the injection ports 9a, 9b, 9c, 9d, 9e and the injection ports 11a, 11b, 11c, 11d, 11e of the agent injection nozzle 5 (step 115).

  On the contrary, when the spraying pressure of the release agent is not within the changeable range, even if the upper mold 1 and the lower mold 3 apply the release agent by changing its application condition, the improvement of the release property is ensured. It is determined that the temperature is so high as to be impossible, and a high temperature alarm is output from a display or speaker (not shown) (step 121). In the next production, it is possible to replace the injection port of the alarm output part with a high-performance one.

  The determination in step 117 may be performed by determining whether or not the measured mold temperature can be lowered to the optimum temperature range with the maximum injection pressure that is possible in the release agent supply unit 17.

  Note that the determination of the injection time extension possible range and the change of the injection time in Steps 111 and 113 described above may be interchanged with the determination of the injection pressure changeable range and the injection pressure change in Steps 117 and 119.

  Further, in each of the above-described embodiments, the release agent injection time and the injection pressure are set as the release agent application conditions. In addition to these, the release agent temperature, the release agent injection direction, and the like May be changed as appropriate, and air blow may be added.

  Further, in each of the above-described embodiments, only the vicinity of the AA cross section in FIG. 2 in the lower mold 1 and the upper mold 3 has been described. The injection time, the injection pressure, and the specifications of the injection ports from the injection ports (not shown) provided at other parts of the body 7 are appropriately changed.

  FIG. 8 is a front sectional view of a release agent coating apparatus showing a third embodiment of the present invention. In the third embodiment, instead of the temperature sensor 13 in the first embodiment shown in FIG. 1, a radiation thermometer 43 as a non-contact type temperature detecting means for measuring the temperature in a non-contact manner is used as a release agent. It is provided in the injection nozzle 5.

  The radiation thermometer 43 here detects the intensity of infrared rays radiated from the mold surface and measures the temperature, and corresponds to the above-described parts 1a to 1e and 3a to 3e in the lower mold 1 and the upper mold 3. Thus, the nozzle body 7 is provided in the vicinity of the injection ports 9a to 9e and 11a to 11e. At this time, each radiation thermometer 43 determines an installation position so that infrared rays from the corresponding portions 1a to 1e and 3a to 3e can be detected efficiently. Other configurations are the same as those in the first embodiment.

  In FIG. 8, wiring for connecting each radiation thermometer 43 and the release agent applicator 15 is omitted.

  Also in the third embodiment, after forging and forming the workpiece W shown in FIG. 2 between the lower die 1 and the upper die 3 as shown in FIG. 4, the workpiece W after being opened as shown in FIG. The mold release agent injection nozzle 5 is inserted into an intermediate position between the lower mold 1 and the upper mold 3 in a state in which is removed.

  In this state, based on the temperatures of the lower mold 1 and the upper mold 3 detected by the radiation thermometer 43, the application condition control circuit 23 performs the injection pressure and injection of the release agent. The time is controlled in the same manner as in the first embodiment. At this time, the control method shown in the second embodiment shown in FIG. 6 may be applied.

  Thus, also in the third embodiment of the present invention, as the application condition of the release agent, at least one of the release agent injection pressure, the injection time, and the specification of the injection port is set as the lower mold 1 and Since it changes for each part in which temperature differs in upper mold 3 and it secures the injection quantity according to temperature, it prevents overcooling and insufficient cooling for each part of lower mold 1 and upper mold 3 The lower mold 1 and the upper mold 3 can be properly cooled, and the lubrication / release properties of the forged product 29 can be improved.

  At this time, in this embodiment and the above-described second embodiment, the troublesome work of attaching the temperature detecting means to the lower mold 1 and the upper mold 3 becomes unnecessary, and the temperature due to the attachment to the lower mold 1 and the upper mold 3 is eliminated. This is effective as a countermeasure against failure of the detection means.

  Moreover, in this embodiment, as shown in FIG. 9, air blow is performed using the release agent injection nozzle 5 before and after the release agent application step in FIG. In this case, an air passage (not shown) that branches from the middle of each pipe 21 from the release agent supply part 17 to the injection ports 9a to 9e and 11a to 11e is provided, and a switching valve is provided at this branch part. By switching this switching valve so that air from an air source installed upstream of the air passage flows to each of the injection ports 9a to 9e and 11a to 11e, air is injected from the injection ports 9a to 9e and 11a to 11e. Air blow.

  In addition, you may use a dedicated air nozzle for air blow, without using the mold release agent injection nozzle 5 together. Further, this air blow may be performed in each of the first and second embodiments.

  Then, the temperature measurement by the radiation thermometer 43 is performed before and after the air blowing process of FIG. 9A and between the air blowing processes of FIG. Any timing can be used as long as the release agent injection nozzle 5 is inserted between the upper mold 1 and the lower mold 3 before and after the process.

  In particular, by measuring the temperature at the timing B in FIG. 9 after the air blowing process and before the release agent application process, the release between the molds scattered at the time of the previous release agent application Since a mist such as an agent can be blown off, when a non-contact type temperature detecting means is used as in this embodiment, temperature measurement with higher accuracy is possible.

  The radiation thermometer 43 may not be provided for each of the injection ports 9a to 9e and 11a to 11e, but may be provided only for a portion where the temperature tends to be particularly high.

It is front sectional drawing of the mold release agent coating device which shows the 1st Embodiment of this invention. FIG. 2 is a side view of a forging mold applied to the release agent coating apparatus of FIG. FIG. 3 is a plan view of the forging mold shown in FIG. 2. FIG. 3 is a front cross-sectional view corresponding to the AA cross section of FIG. 2 after the forging of the forging mold of FIG. 2. It is front sectional drawing of the mold release agent coating device which shows the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of the coating condition control circuit in 2nd Embodiment. It is explanatory drawing which shows the temperature passage after forge molding in a certain site | part with a die for forging molding. It is front sectional drawing of the mold release agent coating device which shows the 3rd Embodiment of this invention. It is explanatory drawing which shows the temperature measurement timing in 3rd Embodiment.

Explanation of symbols

1 Lower mold (mold)
1a, 1e High temperature part of lower mold 1b, 1d Low temperature part of lower mold 1c Medium temperature part of lower mold 3 Upper mold (mold)
3a, 3e High temperature part of upper mold 3b, 3d Low temperature part of upper mold 3c Medium temperature part of upper mold 5 Release agent injection nozzle (release agent injection means)
13 Temperature sensor (temperature detection means)
25 Thermo Viewer (Non-contact type temperature detection means)
25. Temperature sensor for correction (temperature detection means for temperature correction)
29 Forgings 9a to 9e, 11a to 11e Injection port 23 Application condition control circuit (application condition control means, temperature correction means)
43 Radiation thermometer (non-contact type temperature detection means)

Claims (18)

  In a mold release agent coating method for applying a mold release agent to a mold for forging a forged product, the mold release agent is applied to the mold by changing the application conditions of the mold release agent for each part of the mold. A release agent coating method characterized by comprising:   2. The mold release agent coating method according to claim 1, wherein a temperature is measured for each part of the mold, and the mold release agent is applied to each of the temperature-measured parts while changing the coating conditions. .   The mold release agent coating method according to claim 2, wherein as the measured temperature is higher, the application amount of the release agent is increased as the application condition of the release agent.   When increasing the application amount of the release agent, the injection pressure, the injection time, the injection range of the release agent injection means for injecting the release agent, and the mist-like release injected from the release agent injection means The release agent coating method according to claim 3, wherein at least one of the particle sizes of the agent is changed.   The mold release agent coating method according to any one of claims 2 to 4, wherein the temperature of each part of the mold is measured by temperature detection means attached to each part.   The mold release agent coating method according to any one of claims 2 to 4, wherein the temperature of each part of the mold is measured by a non-contact type temperature detecting means.   7. The mold release agent coating method according to claim 6, wherein the non-contact type temperature detecting means is a thermo viewer that displays an image of a temperature distribution of each part of the mold.   The release agent coating method according to claim 6, wherein the non-contact type temperature detection means is a radiation thermometer attached to the release agent injection means for injecting the release agent.   9. The temperature of each part of the mold measured by the non-contact type temperature detecting means is corrected based on the temperature detected by the temperature correcting temperature detecting means provided in the mold. The mold release agent coating method of any one of these.   When the forging process is continuously performed, after the forging after the forging process is taken out from the mold, the application of the release agent is performed after the next workpiece is put into the mold. The mold release agent coating method according to claim 1, wherein application conditions of the mold release agent are changed so as to be completed.   The mold release agent coating method according to any one of claims 6 to 9, wherein the temperature is measured by the temperature detection means after air is blown around the mold.   In a release agent coating apparatus for applying a release agent to a mold for forging a forged product, a release agent injection means for injecting the release agent toward the mold, and the release agent injection means. A mold release agent application apparatus, comprising: application condition control means for changing the application condition of the mold agent for each part of the mold.   Temperature detection means for detecting the temperature of each part of the mold is provided, and the application condition control means is controlled by the release agent injection means according to the temperature of each part of the mold detected by the temperature detection means. The release agent coating apparatus according to claim 12, wherein application conditions of the release agent are changed.   14. The release agent coating apparatus according to claim 13, wherein the temperature detection means is installed for each part of the mold, and the release agent injection means is provided corresponding to each part.   The temperature detecting means is a non-contact type temperature detecting means for detecting the temperature of each part of the mold in a non-contact manner, and the release agent injection means is provided corresponding to each part of the mold. The mold release agent coating apparatus according to claim 13.   16. The release agent coating apparatus according to claim 15, wherein the non-contact type temperature detecting means is a thermo viewer that displays an image of a temperature distribution of each part of the mold.   16. The release agent coating apparatus according to claim 15, wherein the non-contact type temperature detection means is a radiation thermometer attached to the release agent injection means for injecting the release agent.   A temperature correction for providing temperature correction means for temperature correction in the mold, and correcting the temperature of each part of the mold detected by the non-contact type temperature detection means based on the temperature detected by the temperature correction temperature detection means The mold release agent coating apparatus according to any one of claims 15 to 17, further comprising means.

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