JP2016083589A - Coating device for coating agent and coating method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of a coating treatment film by suitably preheating a mold to be coated on one surface by a coating agent, and to reduce the man-hour of a coating process.SOLUTION: A coating device 100 for coating a coating agent C on one surface 10a of a mold comprises a coating means G for coating the coating agent C, and a mold heating unit 1 for heating the mold 10 from the other surface 10b of the mold.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a coating agent application apparatus and application method, and more particularly, to a coating agent application apparatus and application method for applying a coating agent to one surface of a mold.

Conventionally, for example, in a low pressure casting, a casting mold into which an aluminum alloy molten metal of 700 ° C. or more is poured, in order to prevent a decrease in the fluidity and mold release of the molten metal, and the heat of the molten metal A coating agent using silica (SiO2) or the like as a base material and water glass as a binder is applied so as not to damage the mold surface forming the shape part.
In the case of a mold for casting a product having a concavo-convex shape with a complicated surface shape or internal shape such as a cylinder head, a skilled person is required to form a uniform coating film. The coating agent is sprayed onto the uneven parts using a paint gun.

  As a coating technique that can make the coating film thickness uniform and improve the durability of the coating layer even if it is not an expert, the applicant has A technology for forming a coating film by evaporating a part of the water content by the heat of the mold was filed (Patent Document 1).

  In the coating agent application apparatus described in Patent Document 1, as a method of warming a mold for applying a coating agent, a pre-application mold to be heated in a preheating furnace whose interior is maintained at a constant temperature is used. The mold surface was heated by the radiant heat of the heater of the preheating furnace to raise the temperature.

Japanese Patent No. 5274415 (Claim 1)

  However, when the mold surface is heated by the radiant heat of the heater of the preheating furnace, since the heat radiation from the mold surface is large, preheating takes a long time (for example, about 40 to 100 minutes). There was a problem that work efficiency was bad because it could not be done.

In addition, the predetermined processing of the mold has an appropriate temperature range for appropriate processing, and in the processing of applying the coating agent, for example, a constant film thickness in an appropriate temperature range of 200 to 230 ° C. Apply the coating agent in multiple layers until
Since this coating agent is water-soluble and lowers the temperature of the mold surface when it is applied, if the temperature falls below, for example, 180.degree. For this reason, since the coating process is interrupted and the temperature is raised in the preheating furnace, since the preheating temperature rise and the coating agent application are repeated, there is a problem that the work efficiency is poor.

  The present invention has been made in view of such a background, and suitably improves the quality of the coating film by preheating a mold for applying a coating agent on one surface, and reduces the number of steps in the coating process. It is an object of the present invention to provide a coating agent coating apparatus and a coating method that can be achieved.

  In order to solve the above-mentioned problems, an invention according to claim 1 is directed to a coating agent coating apparatus that applies a coating agent to one surface of a mold, the coating means for coating the coating agent, and the mold. And a mold heating device for heating from the other surface of the mold.

The coating agent coating apparatus according to the present invention includes a mold heating device that heats the mold from the other surface of the mold, so that heat is applied from the other heated surface to one surface. Since it is transmitted, the inside of the mold is warmed and stored from the other heated surface side, so that one surface of the mold has a preheating characteristic that it is difficult to cool. Such preheating characteristics are particularly suitable for maintaining and managing the surface temperature of one surface on which a coating process (application of a coating agent) is performed on a mold having a relatively large heat capacity. .
For this reason, the coating agent coating apparatus according to the present invention can easily manage the surface temperature of the mold appropriately, so that the quality control of the coating film is easy and the power consumption required for heating can be considerably reduced. .

  In addition, the coating agent coating apparatus according to the present invention includes a mold heating device that heats from the other side of the mold, so that the coating agent is applied to one surface while heating the mold. be able to. For this reason, the surface temperature of the mold can be properly managed even while the coating is being applied, so that the quality control of the coating film is easy and the two processes can proceed simultaneously, thereby reducing man-hours.

  According to a second aspect of the present invention, there is provided a coating agent application apparatus for applying a coating agent to one surface of a mold, comprising: an application means for applying the coating agent; and a mold heating apparatus for heating the mold. The mold heating apparatus includes a base member and a support base that is disposed on the base member and supports the other surface so as to form a space between the base member and the other surface of the mold. And an induction coil that is disposed in the space and heats the mold from the other surface, and a control device that controls the operation of the induction coil.

  The coating agent coating apparatus according to the present invention includes a mold heating device that heats a mold with an induction coil. Can be heated. Since heat is transferred from the inside of the heated mold toward one surface (for example, the product shape surface of the mold) to which a predetermined treatment is performed, heat dissipation is suppressed and the mold is easily warmed (as in the conventional case). It can be preheated in about 20 minutes for a mold of about a degree), and it is hard to be cooled by the heat accumulated inside (preheating characteristic).

  For this reason, the coating agent coating apparatus according to the present invention is easy to properly control the surface temperature of the mold, so that the quality control of the coating film is easy, and even a non-skilled person can easily and properly perform a proper coating process. Can be executed. In addition, since it has a preheating characteristic that it is difficult to cool by the heat accumulated inside, the power consumption required for heating can be considerably reduced.

  The coating agent coating apparatus according to the present invention controls the operation of the induction coil that heats the mold, so that the shape of the induction coil according to the unevenness of the product shape portion formed on one surface of the mold, Since the high frequency current flowing through the induction coil can be controlled by appropriately setting the arrangement, the surface temperature of one surface to which the coating agent is applied is suitably adjusted so as to have an appropriate temperature range and uniform temperature distribution. be able to.

  In this way, the coating agent coating apparatus according to the present invention heats the inside of the mold from the other side of the mold, and performs a predetermined coating process from the inside of the mold that has been heated and stored. By transferring heat to one surface, the heat retention of one surface to be coated is improved, so that the surface temperature of one surface is in the proper temperature range and uniform temperature distribution It can be suitably maintained and managed. For this reason, it is possible to improve the quality of the coating film and reduce the number of steps for the coating process.

  The invention according to claim 3 is the coating agent application device according to claim 1 or 2, wherein the control device operates the induction coil according to a preset preheating pattern. .

  According to such a configuration, the flow pattern of the high-frequency current flowing through the induction coil is appropriately set according to the shape and arrangement of the induction coil, or the movement pattern of the induction coil is set on one surface of the mold by the coil moving device. It is suitable for automatic operation because it can be set as appropriate according to the unevenness etc. of the formed product shape part, so that the surface temperature of one surface is in an appropriate temperature range and uniform temperature distribution It can adjust suitably.

  The invention according to claim 4 is the coating agent application apparatus according to any one of claims 1 to 3, comprising an image temperature sensor that detects a temperature distribution of the one surface, and the control. The apparatus controls the operation of the induction coil based on the temperature distribution.

  According to such a configuration, by controlling the operation of the induction coil based on the temperature distribution detected by the image temperature sensor, the surface temperature of one surface becomes a more appropriate temperature range and a uniform temperature distribution. It can be adjusted reliably.

  The invention according to claim 5 is the coating agent application apparatus according to claim 4, wherein the application means is a spray gun, and the spray gun is separated from the one surface by a predetermined distance. And a spray gun moving device for moving the spray gun moving in a state where the spray gun moving device is moved based on a temperature distribution detected by the image temperature sensor.

  According to such a configuration, by controlling the operation of the induction coil based on the temperature distribution detected by the image temperature sensor, the surface temperature of one surface becomes a more appropriate temperature range and a uniform temperature distribution. It can be adjusted reliably.

  The invention according to claim 6 is the coating agent application apparatus according to claim 4 or 5, wherein the application means has a laser irradiation means for emitting laser light in the application direction of the coating agent. The mold is irradiated with the laser beam while the coating agent is being applied.

  According to such a configuration, it is possible to clearly indicate the central location where the coating agent is applied by irradiating the mold with the laser beam while the coating agent is being applied by the laser irradiation means.

  The invention according to claim 7 is the coating agent coating apparatus according to claim 3, further comprising a notifying unit for notifying that the preheating operation for executing the preheating pattern is completed.

  According to such a configuration, it is possible to notify another device, an operator of the next process, or the like that the mold has reached the predetermined target temperature by providing the notification unit that notifies that the preheating operation is completed. it can.

  The invention according to claim 8 is the coating agent application apparatus according to claim 4 or 5, wherein the coating agent is applied when the temperature distribution detected by the image temperature sensor becomes a predetermined temperature distribution. The operation is started.

  According to such a configuration, since the coating agent application operation can be started at an appropriate timing by starting the coating agent application operation when a predetermined temperature distribution is obtained, smooth automatic operation is performed. Can do.

  The invention according to claim 9 is the coating agent application device according to any one of claims 1 to 8, wherein the base member is supported by a transport device, and the mold is moved by the transport device. It conveys in the state supported by the said mold heating apparatus.

  According to this configuration, by providing a transport device that transports the mold in a state of being supported by the mold heating device, the mold is heated by the mold heating device while transporting the mold, or the coating agent is used. It can be conveyed to a process area to be applied. For this reason, it can apply suitably to an automation line and can improve productivity.

  A tenth aspect of the present invention is the mold heating apparatus according to the ninth aspect, wherein the conveying means places a plurality of the mold heating apparatuses and supports the mold on the mold heating apparatus. The coating agent is applied by the application means while being sequentially conveyed to the application means in a state.

  According to this configuration, productivity can be improved by continuous production, and the production volume can be flexibly managed according to the production plan.

  The invention according to claim 11 is a coating method in which a coating agent is applied to one surface of a mold, a preheating step of preheating the mold from the other surface of the mold by an induction coil, and the induction coil, And an application step of applying the coating agent while controlling the temperature of one surface of the mold.

  According to such a configuration, by applying the coating agent while controlling the temperature of one surface of the mold by the induction coil, the surface of the mold to which the coating agent is applied is kept in an appropriate temperature range and uniform. Since the coating agent can be applied while maintaining the temperature distribution, the quality of the coating film can be improved. In addition, since the process of applying the coating agent is not interrupted and the mold is not heated, man-hours can be reduced and productivity can be improved.

  The coating agent coating apparatus and coating method according to the present invention suitably preheats a mold for coating a coating on one surface to improve the quality of the coating film and reduce the number of steps in the coating process. Can do.

It is front sectional drawing which shows the coating device of the coating agent which concerns on embodiment of this invention. It is front sectional drawing which shows the structure of the metal mold | die heating apparatus which concerns on embodiment of this invention. It is a graph which shows the basic heating characteristic of the induction coil which concerns on embodiment of this invention. It is front sectional drawing which shows operation | movement of the metal mold | die heating apparatus which concerns on embodiment of this invention, (a) is an arrangement | positioning of an induction coil, When obtaining an appropriate preheating heat retention characteristic, (b) and (c) are coil moving apparatuses. This is a case where an appropriate preheating heat retention characteristic is obtained by the above operation. It is a top view which shows the other Example of the coating device of the coating agent which concerns on embodiment of this invention. FIG. 6 is a perspective view of FIG. 5.

A coating agent coating apparatus 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4 as appropriate.
As shown in FIG. 1, the coating agent coating apparatus 100 is an apparatus that forms a coating film CM by applying a coating agent C to a surface 10 a (for example, a product shape surface) that is one surface of a mold 10. .

The coating agent application device 100 includes a coating agent application unit 110, a mold heating device 1, and a conveyance device 120 that conveys a mold (10 or the like) to a predetermined process.
The coating agent application apparatus 100 applies the coating agent C in a coating agent application process in a state where the mold 10 is heated and kept warm by the mold heating device 1. The coating agent coating apparatus 100 heats the mold 11 with the mold heating apparatus 1A, heats the mold 12 with the mold heating apparatus 1B, and heats the mold 13 with the mold heating apparatus 1C. The molds 11, 12, and 13 are transported by the transport device 120 until the coating agent application step.
In the following description, the molds 11, 12, and 13 have shapes and the like different from those of the mold 10, but the coating process of the coating agent to the molds 11, 12, and 13 is the same as that of the mold 10. Description is omitted.

The coating agent application unit 110 includes a robot R that is a spray gun moving device, a spray gun G that is an application unit mounted on the robot R, and a laser for clearly indicating a center point (application point) for applying the coating agent C. A pointer 111 and an application unit control unit 112 that controls the operation are provided. The coating agent applying means 110 sprays and applies the coating agent C to the product shape portion (uneven portion) on the surface of the mold 10 using the spray gun G. Since the coating film CM requires a predetermined film thickness, the coating film CM is not shown in the figure, but if the coating agent C is applied, it is cured and coated in multiple layers.
The coating agent C is a coating agent having silicic acid (SiO2) or the like as a base material and water glass as a binder. In addition, although the example applied with the coating gun G mounted on the robot R has been shown, the operator (not shown) may apply the coating gun G by manually operating it.

  The laser pointer 111 is mounted on the spray gun G, and emits laser light (visible light close to the infrared wavelength) in the direction of application and spraying of the spray gun G. While the spray gun G is spraying the coating agent C onto the surface of the mold 10, the laser pointer 111 irradiates the surface of the mold 10 with laser light to clearly indicate the application point (indicated point). The indication point specified by the laser pointer 111 is the spray center through which the atomized coating agent C flows most when the coating agent C is applied to the surface of the mold 10.

The transfer device 120 positions and holds the mold (10, etc.) in the coating agent application process in which the transfer means 121 for transferring the mold (10, etc.) to a predetermined process and the coating means 110 are disposed. A lifter device 122 and a transport control unit 123 that controls the operation are provided.
The transport device 120 transports the mold heating device 1 and the mold 10 together, transports the mold heating device 1A and the mold 11 together, and transports the mold heating device 1B and the mold 12 together. The mold heating device 1C and the mold 13 can be transported together.
The conveyance control unit 123 is connected to the control device 5 (see FIG. 2) of the mold heating device 1 and the control unit 112 (see FIG. 2) of the coating unit 110 so that signals can be transmitted and received.

  With this configuration, the mold 10 or the like can be transported to the coating agent coating apparatus 100 by the transport unit 121 while the mold 10 or the like is preheated by the mold heating apparatus 1. In the coating agent application step, the coating agent C can be applied by the coating agent application means 110 while keeping the mold 10 or the like warm by the mold heating device 1 or the like.

  As shown in FIG. 1, the mold 10 is a mold for low-pressure aluminum casting. For example, a mold having a product shape in which a curved surface or a step having a complicated uneven shape such as a combustion chamber of an engine is formed. Can be applied to. FIG. 2 shows a simplified product shape for convenience of explanation.

  In the present embodiment, a case where the coating agent application apparatus 100 is applied to a die (10 or the like) for applying the coating agent C will be described. However, the present invention is not limited to a die for low-pressure aluminum casting. The present invention can also be applied to a core mold, a hot press mold, a resin mold, and the like that are fitted into a mold.

<Mold heating device>
As shown in FIG. 2, the mold heating apparatus 1 controls the operation of the base member 2, the support 3 disposed on the base member 2, the induction coil 4 that heats the mold 10, and the induction coil 4. A control device 5, a coil moving device 6 for moving the induction coil 4, an informing means 53 for informing that the preheating operation has been completed, and an image temperature sensor 54 for detecting the temperature distribution on the mold surface. Yes.
The mold heating apparatus 1 is an apparatus that preheats the mold 10 to a predetermined appropriate temperature range. In the case of a process of applying the coating agent C (see FIG. 1), for example, the surface 10a of the mold 10 is applied. It manages so that it may become a suitable temperature range of 1800-250 degreeC.

  The base member 2 is a member for supporting the support base 3 and arranging components such as the mold 10 and the induction coil 4 at predetermined positions, but is not particularly limited. It may be configured in a rack shape, or a mounting table (not shown) disposed on the upper portion of the transfer device 120 (see FIG. 1) may be applied.

The support 3 is a member for supporting the back surface 10b of the mold 10 by forming a space 3a between the other surface (for example, the back surface) of the mold 10 but is not particularly limited. In addition, various shapes such as a block shape, a shelf shape, a wall shape, and a column shape can be adopted so as to conform to the shapes of the mold 10 and the induction coil 4.
A non-magnetic heat-resistant plate 31 is disposed on the support base 3 in order to efficiently heat the mold 10. The support 3 supports the mold 10 via a nonmagnetic heat resistant plate 31.

  The induction coil 4 is made of various conductors such as a spiral shape and a zigzag shape. When a high-frequency current is passed through the induction coil 4 by the control device 5, a magnetic line of force Z is generated from the induction coil 4, and the die An eddy current E is generated inside 10 and the mold 10 is heated from the inside (induction heating).

  And since heat is transmitted from the inside of the heated mold 10 toward the product shape surface (surface 10a) of the mold 10 to which the coating agent C is applied, heat dissipation is suppressed and the mold 10 is easily heated. Moreover, it has a preheating characteristic that the surface 10a of the mold 10 is difficult to be cooled by the heat accumulated inside.

  For this reason, the mold heating apparatus 1 according to the embodiment of the present invention is easy to manage the surface temperature of the mold 10, and also greatly increases the power consumption required for heating (1 / (Up to about 10).

  Further, the shape, size, number, arrangement, and the like of the induction coil 4 are appropriately set so as to match the shape of the mold 10, etc. Since the surface can be preheated evenly, it can be suitably applied to various molds 10, 11, 12, 13 (see FIG. 1).

  When the induction coil 4 may be overheated by a long and severe heating operation, it is desirable to provide a cooling device 41 for cooling the induction coil 4. The cooling device 41 can be configured, for example, to cool the induction coil 4 by ejecting air toward the induction coil 4.

  The control device 5 includes an inverter control unit 51 that controls the frequency and magnitude (IH output) of the high-frequency current that flows through the induction coil 4, an operation control unit 52 that controls the operation of the coil moving device 6 and the like, and a predetermined preset value. And an image temperature sensor 54 for detecting the surface temperature distribution of the mold 10 and managing so that the surface temperature of the mold 10 falls within an appropriate temperature range. To do.

  The control device 5 can control the operation of the induction coil 4 and the coil moving device 6 according to a preset preheating pattern. The preheating pattern is an operation setting pattern stored in advance for preheating the mold 10. For example, a pattern in which an IH output setting pattern, an operation pattern such as a trajectory for moving the induction coil 4, and a speed is stored in advance. It means to execute according to.

When the control device 5 determines that the preheating operation has been completed according to the preset preheating pattern, the control device 5 notifies the operator (not shown), other devices, or the like by the notification means 53.
The notification means 53 can employ a rotation warning light that visually notifies an operator (not shown), a melody sound that is audibly notified, or the like. In addition, the notification unit 53 may employ a communication unit that transmits an electrical signal to the coating agent coating apparatus 100 or the conveying apparatus 120 to notify the user.

The image temperature sensor 54 is a non-contact temperature sensor, and can measure the intensity of infrared rays emitted from the surface 10a of the mold 10 to recognize the temperature distribution on the surface 10a as an image.
And the control apparatus 5 controls operation | movement of the induction coil 4 or the coil moving apparatus 6 based on the temperature distribution of the surface 10a of the metal mold | die 10 which the image temperature sensor 54 measured, or determines completion of preheating operation | movement. be able to.
Further, the image temperature sensor 54 can further capture the position of the indication point of the laser light (visible light close to the infrared wavelength) irradiated on the surface of the mold 10 by the laser pointer 111. Therefore, the image temperature sensor 54 superimposes the position data of the indication point of the laser pointer 111 irradiated on the surface 10a on the image data of the temperature distribution of the surface 10a created by the image temperature sensor 54. Can be sent to.

The image temperature sensor 54 may be installed with a column (not shown) standing on the base member 2 and conveyed together with the mold 10, or may be fixed and installed near the conveying device 120. .
In the present embodiment, the image temperature sensor 54 is used. However, the image temperature sensor 54 is not limited to this, and a contact-type temperature detecting means attached to the mold 10 can also be used.
In the present embodiment, the position of the indication point of the laser light (visible light) irradiated on the surface of the mold 10 by the image temperature sensor 54 is captured, but another image sensor that captures the position of the indication point. May be prepared.

The coil moving device 6 is a device for moving the induction coil 4 along the back surface 10b of the mold 10, and for example, an XY table 6E (see FIG. 4B) that can be moved in the horizontal direction and also in the vertical direction. An XYZ table 6F (see FIG. 4C) including a lifter device that can be moved can be employed. The XY table 6E and the XYZ table 6F include a linear movement guide mechanism (not shown) such as a guide rail, and a driving device (not shown) such as a ball screw or a fluid cylinder mechanism driven by a motor. However, since it is not particularly limited, a detailed description is omitted.
The coil moving device 6 can be appropriately set so as to suit the shape, size, number of individuals, arrangement, etc. of the induction coil 4.

  Next, the operation of the mold heating apparatus according to the embodiment of the present invention will be described with reference mainly to FIGS. FIG. 3 to be referred to is a graph for explaining basic preheating characteristics when the induction coil 4 is uniformly disposed in the entire range of the back surface of the mold 10 as shown in FIG. The surface temperature of the mold 10 when the coating agent C (see FIG. 1) is applied while preheating the mold 10 is displayed for each measurement location H1, H2, H3, and H4 (see FIG. 2).

  The output of the induction coil 4 observes the temperature rise characteristic as IH output 72% until the predetermined temperature T1 is reached (until time t2), and after reaching the predetermined temperature T1, the heat retention characteristic is assumed as IH output 30%. While observing, the change in the surface temperature of the mold 10 was measured.

Until the time t2 when the IH output is 72%, the coating agent is applied twice (C1, C2). From the time t2 when the IH output is 30%, the coating agent is applied three times (C3, C4, C5). The appearance of the surface temperature by applying the coating agent C (drop characteristics) was observed. One coating agent application time is about 45 to 55 seconds.
At an IH output of 72%, the temperature drop is small even while the coating agent C (see FIG. 1) is being applied. When the coating agent C is completely applied, the same rate of temperature increase (temperature per unit time) as before. The surface temperature rises.

  At an IH output of 30% (from time t2 to t3), the temperature falls while the coating agent C (see FIG. 1) is being applied, but after that, no temperature drop is seen and it rises or is maintained. The characteristics are shown. Therefore, it is considered that a constant temperature range can be maintained even during coating of the coating agent C by appropriately setting the IH output in accordance with the heat retaining characteristics during the coating of the coating agent C.

Further, in the temperature rise characteristic up to time t2 at the IH output 72%, the surface temperature of the mold 10 increases linearly with the passage of time, so that the expected time to reach the predetermined temperature T1 can be easily calculated. is there.
On the other hand, the surface temperature of the mold 10 varies depending on the measurement locations H1, H2, H3, and H4 (see FIG. 2). Specifically, the temperature rise rate is the highest at the measurement location H1 because it is the closest distance from the induction coil 4, and the temperature rise rate is the lowest at the measurement location H4 because it is the farthest distance from the induction coil 4.

  In other words, the rate of temperature increase tends to decrease as the distance increases in proportion to the distance from the induction coil 4, and therefore, a larger preheating (amount of heat) is applied to a location far away according to the distance from the induction coil 4. It is desirable to perform the preheating operation with a preheating pattern that gives a smaller amount of preheating (amount of heat) to places where the distance is short.

  As other factors affecting the rate of temperature rise, a difference in heat capacity due to the engraved shape of the mold 10 can be considered, but the temperature distribution can be measured by the image temperature sensor 54 and appropriately taken into account.

Next, the operation of the coating agent coating apparatus 100 according to the embodiment of the present invention will be described mainly with reference to FIG.
As shown in FIG. 1, the coating agent coating apparatus 100 controls the operation of the induction coil 4 according to various preheating patterns by the mold heating apparatus 1 to preheat the mold 10 and (S1), An application step (S2) of applying the coating agent C while controlling the temperature of the surface 10a of the mold 10 according to various heat retention patterns by the mold heating device 1 is executed.
The preheating step is performed in a step before the coating step (S2), and is a step of heating the surface 10a of the mold 10 so as to have an appropriate temperature range and a uniform temperature distribution.

  The applying step (S2) is a step of applying the coating agent C in a state where the temperature of the surface 10a of the mold 10 is heated and maintained so as to have an appropriate temperature range and a uniform temperature distribution. In the coating step (S2), when the coating agent C is applied, the temperature of the surface 10a of the mold 10 drops, so the amount of heat taken away by the application of the coating agent is replenished by the mold heating device 1 so that the surface of the mold 10 is replenished. The temperature of 10a can be maintained in an appropriate temperature range and a uniform temperature distribution.

Specifically, in the coating step (S2), the control device 5 grasps the surface temperature drop at the location where the coating means 110 is coated, based on the temperature distribution of the surface 10a of the mold 10 detected by the image temperature sensor 54. Therefore, the following control is possible.
For example, in the case where the coating film CM is stacked in multiple layers, if the surface temperature is outside the prescribed coating temperature range due to a drop in the surface temperature when the first coating layer is applied, the second layer When the coating layer is applied, for example, the spray gun G is moved to postpone the application outside the applicable temperature range, and the application is applied first from other places within the applicable temperature range. Application can be performed when the surface temperature rises due to the absence of application at a location outside the possible temperature zone and recovers within the applicable temperature zone.

Further, for example, when the application of the coating agent C is first started, it can be applied first from the place where the temperature range where application is possible is reached.
At that time, the control device 5 uses the data obtained by superimposing the position of the indication point of the laser pointer 111 on the image data of the temperature distribution of the surface 10a sent from the image temperature sensor 54, and on the data, the laser pointer The robot R that moves the spray gun G can be easily controlled so that the designated point 111 moves to a location within the temperature range where coating is possible.

The operation of the preheating pattern and the heat retaining pattern will be described with reference to FIG.
FIG. 4 to be referred to is a front cross-sectional view for explaining the operations of various preheating patterns and heat retention patterns executed by the mold heating device. FIG. 4A is a case in which an appropriate preheat heat retention characteristic is obtained by arrangement of induction coils. , (B) and (c) are cases where an appropriate preheating heat retention characteristic is obtained by the operation of the coil moving device.

  Note that the mold 14 shown in FIG. 4 has a simplified structure for convenience of explanation, but the preheating pattern and the heat retention pattern are similarly applied to the molds 10 to 13 (see FIG. 1) having various uneven shapes. Can be applied.

  The preheating pattern is an operation pattern for preheating the mold, and the heat retention pattern is an operation pattern for maintaining the mold, and the purpose thereof is different. However, since the configuration of the operation itself is the same, the mold heating device 1 ( 1D, 1E, 1F) will be described with respect to various preheating pattern operations, and detailed description of the heat retention pattern will be omitted.

  As shown in FIG. 4A, the mold heating device 1D adapts the arrangement and shape of the induction coil 4D (4D1, 4D2, 4D3) to the surface shape of the mold 14 so that the surface temperature of the mold 14 is increased. A preheating pattern is set so that the temperature distribution is uniform. For example, a distance h1 from the position of the surface 14a1 (surface to which the coating is applied) of the mold 14 to the induction coil 4D1, a distance h2 from the position of the surface 14a2 of the mold 14 to the induction coil 4D2, and the surface 14a3 of the mold 14 By setting the arrangement and shape of the induction coil 4D so that the distance h3 from the position to the induction coil 4D3 is the same (h1 = h2 = h3), the surface temperature distribution of the mold 14 can be made uniform.

In addition, the arrangement and shape of the induction coil 4D (4D1, 4D2, 4D3) are not adjusted, but the output of the high-frequency current flowing through the induction coil 4D (4D1, 4D2, 4D3) is adjusted to adjust the lines of magnetic force Z and the eddy current E ( You may control the magnitude | size of FIG. Preheating (amount of heat) may be applied by adjusting the output of the high-frequency current so as to be proportional to the distance from the surface 14a of the mold 14 to the induction coil 4D (4D1, 4D2, 4D3).
In other words, in order to raise the mold temperature to reach a predetermined temperature, the inverter control unit 51 may control it with a constant IH output, or in the preheating pattern for raising the mold temperature, the inverter The control unit 51 can freely adjust the IH output to raise the mold temperature.

  As shown in FIG. 4B, the mold heating device 1E adjusts the speed of moving the induction coil 4E in the horizontal direction by the coil moving device 6E, so that the temperature of the surface 14a of the mold 14 is uniform. Execute preheating pattern set to be distribution. For example, when large preheating is applied, the surface temperature of the mold 14 can be set to have a uniform temperature distribution by slowing the moving speed, stopping it, or increasing the stopping time. it can.

  Specifically, the distance h1 from the position of the surface 14a1 (surface to which the coating is applied) of the mold 14 to the induction coil 4D1, the distance h2 from the position 14a2 of the mold 14 to the induction coil 4D2, the When the distance h3 from the position of the surface 14a3 to the induction coil 4D3 is h2> h1> h3, the moving speed can be slowed or the stop time can be lengthened in proportion to each distance.

  As shown in FIG. 4C, the mold heating device 1F executes a preheating pattern in which the coil moving device 6F moves the induction coil 4F not only in the horizontal direction but also in the vertical direction. For example, the induction coil 4F is also moved in the vertical direction according to the distance from the surface 14a of the mold 14 to the induction coil 4F. Specifically, the induction coil 4F is moved upward according to the distance h2 from the position of the surface 14a2 of the mold 14 to the induction coil 4F, and the distance h3 from the position of the surface 14a3 of the mold 14 to the induction coil 4F is reached. In addition, by moving the induction coil 4F downward, the surface temperature of the mold 14 can be set to have a uniform temperature distribution.

The coating agent coating apparatus 100 configured as described above has the following operational effects.
That is, since the mold heating apparatus 1 heats the inside of the mold 10 from the back surface 10b side of the mold 10, heat is transmitted from the heated back surface 10b side to the surface 10a of the mold 10, 10 has a preheating characteristic that the surface 10a is difficult to cool. Such preheating characteristics are particularly suitable for maintaining and managing the surface temperature of the mold 10 to be coated in a proper temperature range for a mold having a relatively large heat capacity.

  Moreover, since the mold heating apparatus 1 can preheat the surface 10a of the mold 10 while heating the mold 10 by heating from the back surface 10b side of the mold 10, Since the coating step of the coating agent C can be performed together, the preheating temperature of the mold 10 can be suitably managed. Therefore, an appropriate coating film CM can be formed, and man-hours can be reduced.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications. For example, in the present embodiment, in the coating step (S2), the coating agent C is applied while heating the mold 10 according to various heat retention patterns by the mold heating device 1, but the present invention is not limited to this. If the preheating is performed by the mold heating device 1 and the amount of heat is sufficiently stored in the mold 10, the preheating process (S1) is preheated, and then the coating process (S2) is heated or kept warm. It is also possible to execute an application step of applying the coating agent C without performing it.

  In the present embodiment, the case where the molds 10, 11, 12, and 13 are transported to the coating agent application unit 110 while being supported by the transport device 120 has been described. However, the present invention is not limited to this. 5 and FIG. 6, the coating gun G constituting the coating agent applying means 110 is moved by the robot R in a state where the dies 14, 15, 16, 17, 18, 19 are disposed at predetermined positions. The coating agent application apparatus 100 may be configured to perform the above operation.

Specifically, a die 14 and the like and a die heating device 1G, 1H, 1I, 1J, 1K, and 1L for preheating the die 14 and the like are disposed so as to surround the robot R so that the preheating is performed. The coating agent C (see FIG. 1) can be applied by the coating agent applying means 110 in the order in which preheating is completed on the completed mold 14 and the like. The mold heating device 1G and the like include coil moving devices 6G, 6H, 6I, 6J, 6K, and 6L that preheat the mold 14 and the like appropriately.
With this configuration, it is not necessary to transport the coating agent application device 100, the mold 14 and the like to the coating agent application device 100, respectively, so that the configuration can be simplified and productivity can be improved.

1, 1A, 1B, 1C, 1D, 1F Mold heating device 2 Base member 3 Support base 3a Space portion 4, 4D, 4E, 4F Inductive coil 5 Control device 6 Coil moving device 6E XY table (coil moving device)
6F XYZ table (coil moving device)
10, 11, 12, 13, 14 Mold 10a Mold surface (one surface)
10b The back of the mold (the other side)
14a1 surface 14a2 surface 14a3 surface 14a surface 31 non-magnetic heat resistant plate 41 cooling device 51 inverter control unit 52 operation control unit 53 notification unit 54 image temperature sensor 100 coating device 110 coating unit 111 laser pointer 112 coating unit control unit 120 transport device 121 transport Means 122 Lifter Device 123 Conveyance Control Unit C Coating Agent CM Coating Film E Eddy Current G Spray Gun (Coating Means)
R Robot (spray gun moving device)

Claims (11)

In a coating agent application device that applies a coating agent to one side of a mold,
An application means for applying the coating agent;
A mold heating device for heating the mold from the other surface of the mold;
An apparatus for applying a coating agent, comprising: In a coating agent application device that applies a coating agent to one side of a mold,
An application means for applying the coating agent; and a mold heating device for heating the mold,
The mold heating device is:
A base member;
A support base disposed on the base member and supporting the other surface so as to form a space between the base member and the other surface of the mold;
An induction coil disposed in the space and heating the mold from the other surface;
A control device for controlling the operation of the induction coil;
An apparatus for applying a coating agent, comprising:   The said control apparatus operates the said induction coil according to the pre-heating pattern set beforehand, The coating agent application apparatus of Claim 1 or Claim 2 characterized by the above-mentioned. An image temperature sensor for detecting the temperature distribution of the one surface;
The said control apparatus controls the operation | movement of the said induction coil based on the said temperature distribution, The coating device application | coating apparatus of any one of Claims 1-3 characterized by the above-mentioned. The application means is a spray gun,
A spray gun moving device for moving the spray gun in a state separated from the one surface by a predetermined distance;
Moving the spray gun moving device based on the temperature distribution detected by the image temperature sensor;
The coating agent application apparatus according to claim 4.   The application means has laser irradiation means for emitting laser light in the application direction of the coating agent, and irradiates the mold with the laser light while applying the coating agent. Item 6. The coating agent application device according to Item 4 or Item 5.   The coating agent coating apparatus according to claim 3, further comprising a notifying unit that notifies that a preheating operation for executing the preheating pattern is completed.   6. The coating agent application apparatus according to claim 4, wherein the coating agent application operation is started when the temperature distribution detected by the image temperature sensor becomes a predetermined temperature distribution.   The said base member is supported by the conveying apparatus, It conveys in the state which supported the said metal mold | die to the said mold heating apparatus with the said conveying apparatus, The any one of Claim 1-8 characterized by the above-mentioned. Coating agent application device. The conveying means places a plurality of the mold heating devices,
Applying the coating agent by the application means while transporting the mold to the application means in order while being supported by the mold heating device;
The coating agent application device according to claim 9. In the coating agent application method of applying a coating agent to one surface of a mold,
A preheating step of preheating the mold from the other side of the mold by an induction coil;
An application step of applying the coating agent while controlling the temperature of one surface of the mold by the induction coil;
A method for applying a coating agent, comprising:

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