KR20050031040A - Dry and hardening method that use near infrared rays heater module device and this - Google Patents

Abstract

Provided are a linear near-infrared ray type heater module device capable of rapidly and completely drying subjects, thereby reducing dimension of drying equipment and power consumption without generation of harmful gas from the heater, and process for drying and hardening with the heater module device. The heater module device(10) is equipped in a drying and hardening apparatus comprising generally a drying chamber, a ventilation apparatus to exhaust gas and heat generated during the drying and a conventional delivery device for transporting subjects to be dried. The heater module(10) comprises a near-infrared ray lamp(11) and an elliptical reflection plate(13) and a housing(12) with a structure having maximum area using specified construction of a cooling pin. The drying and hardening apparatus further includes a compressed air injector between at least two of the heater modules(10); a temperature sensor for preventing overheat of the heater module; a control part applying control signals to the heater module.

Description

Linear and near-infrared heater module device and drying and curing method using the same {Dry and hardening method that use near infrared rays heater module device and this}

The present invention relates to a linear near-infrared heater module device and a drying and curing method using the same, and in particular, it is applicable to a product that requires drying in the local and longitudinal direction of the outside and inside of the object.

In the prior art, in order to dry the coating material applied to the inside and the outside in the longitudinal direction on the object, first, by drying by heat transfer method or the like by hot air drying as shown in FIG. In order to dry completely within a short transfer time, GAS burners or hot air type devices are installed in very long sections. In addition, when drying the paint applied on the inside of the object, it is more difficult to dry than the outside of the object. A method of simultaneously drying a large amount of objects that have been subjected to an external drying process with a large drying furnace is used. This conventional technique has a lot of difficulties in the production of the object, such as the problem of the drying quality caused by the convection around the drying system, in particular the drying system due to the nature of the process.

In addition, the conventional method of drying by heat takes a lot of preparation time to maintain the temperature of the GAS burner and hot air fan to a certain temperature during the initial start-up, and always keeps electricity and fuel even when the object is not input while maintaining the constant temperature. There is a problem that must be consumed. If the transfer means of the object is stopped due to a failure while maintaining at a certain temperature there is also a problem that can cause an abnormality in many objects that were being transferred.

In particular, in the method of drying by heat using fuel, various harmful gases generated during combustion of fuel and various harmful gases generated during drying adversely affect the object as well as the human, polluting the environment, and thus the environmental purification equipment. There is a problem that requires additional installation.

An object of the present invention for solving the above problems, it is possible to use a part of the conventional production line for transporting the object and locally the strong radiant energy integrated in the longitudinal direction with the near-infrared heater while the object is transported locally to the object. The present invention provides a linear near-infrared heater module device and method that enable to completely dry a coating applied to the inside and outside of an object by irradiating within a very short time.

In the case of drying and curing using near-infrared rays, the use share of near-infrared rays with a wavelength range of 0.76 to 1.4 mm is used by using an output of 3,000 to 3,500K or more compared to the conventional technology of the thermal conductivity method by the IR heater using an output of 2,500K or less. It can be dried within 5 ~ 10 seconds because it quickly dries and hardens the coating part by using physical properties of high thermal density of 800 (KW / ㎡) or higher energy density, and the existing long drying furnace is unnecessary. In addition, since the strong radiation energy penetrates into the paint of the object to be evaporated instantaneously evaporating the solvent component, the process is completed in a few seconds without any problem in the instant drying and curing to the inside of the coating layer of the object. However, in the case of the drying of the paint applied to the inside of the object, drying is inevitable because the near infrared is not irradiated to the inside of the object, unlike the outside where the infrared is directly irradiated. It is possible to replace the large drying furnace used in the prior art because of the heating to temperature. However, since the external paint of the object has a strong radiant energy penetrating inside and evaporates the solvent component in a short time, it dries and hardens to the inside of the coating layer of the object at the same time, while at the same time heat conducts to a high temperature with the internal paint. Since bubbles are generated, a cooling device is constructed between the near-infrared heater modules so that the temperature does not rise rapidly, and the inside can be dried and cured without bubbles.

  In addition, the other object of the present invention is not a heat transfer method, but a near-infrared ray irradiation method with a short wavelength of 0.76 to 1.4 μm, so the design of equipment is free in the installation environment, and the heater preparation time is short because the heater is operated only by electricity. It is to provide a linear near-infrared heater module that can be operated only in close proximity to reduce the electricity consumption time.

In addition, another object of the present invention is a near-infrared irradiation type, so that no harmful gas is generated in the heater, and it is easy to discharge the harmful gas generated in the object to provide an environment-friendly linear near-infrared heater module.

In addition, another object of the present invention as shown in Figure 5 is to irradiate near-infrared in the direction of the object in the application of the linear near-infrared heater module to dry the paint applied locally in the longitudinal direction to the object, such as square or circular pipe shape. In the lamp length direction of the near-infrared heater module at a predetermined distance, to provide a linear near-infrared heater module having an integrated characteristic.

In addition, in cooling the self heat generated when the linear NIR heater module operates, the housing is basically shaped as a cooling fin to optimize the cooling cross-sectional area, and at the same time, the external compression into a passage formed inside the housing including an elliptical reflector. By providing air and cooling water to cool the heat conducted by the drying lamp, it provides a linear NIR heater module with excellent cooling performance.

The present invention relates to a drying and curing method using a linear near-infrared heater module, the near-infrared drying and curing apparatus of the present invention comprises a drying chamber in which the inlet is formed on one side and the outlet is formed on the other side; An object transfer device for loading an object through an inlet of the drying chamber and unloading through an outlet; The near-infrared lamp installed in the drying chamber and generating near-infrared rays irradiates near-infrared rays to the object, and outputs more than 3,000 to 3,500K to enable the use of near-infrared rays in the wavelength band of 0.76 to 1.4 mm in FIG. A near-infrared heater module capable of outputting a physical characteristic with a high thermal density of more than 800 (KW / ㎡) in energy density; And a controller configured to apply a control signal to the near-infrared heater module by sensing a drying progress state of the object by a non-contact temperature sensing means. It is characterized by a method of curing.

  In addition, it is preferable to configure a cooling device by compressed air between each near-infrared heater module for complete drying of the paint applied to the inner and outer surfaces of the object.

Hereinafter, a linear near infrared heater module, a drying apparatus having the same, and a control method thereof according to preferred embodiments of the present invention will be described in detail.

   First, as shown in Figure 1, the near-infrared drying and curing apparatus according to an embodiment of the present invention, the ventilator (2) to largely discharge the drying chamber 1 and the gas and heat that may be generated during drying to the outside Can be installed. The drying chamber 1 is different from the conventional half-sealed or completely-sealed drying chamber of a hot air drying method, and thus is not irradiated with near-infrared rays rather than heat transfer in the drying process. There is no need for a separate opening and closing device at the inlet or outlet of the drying chamber 1, the open-type drying chamber 1 can be ventilated smoothly to reduce the capacity of the ventilator (2).

In addition, the object transfer device of the present invention is to load the object through the inlet of the drying chamber 1, and unloading through the outlet, various types of loading and unloading device may be used, but the existing product production line It is possible to use the same conveying device (3).

In addition, the transfer device 3 is installed through the drying chamber 1, an object capable of sensing input and output of the object (D) at the irradiation start point and the irradiation end point of the near infrared heater module 10, respectively. The sensing means is installed. Here, the object detecting means may be a very different type of object detecting sensor 4 (contact or non-contact optical sensor, etc.) for monitoring the proximity of the object.

Accordingly, the object detection sensor 4 is connected to the control unit 9 to be described later, and the control unit 9 irradiates near infrared rays to the object D from the object detection sensor 4. 2, the near-infrared lamp 12 can be modularized into a separate entity and applied and installed in various places or locations.

The near-infrared heater module 10 according to the preferred embodiment of the present invention may be any type and form of near-infrared heaters capable of emitting near-infrared rays, but preferably, as shown in FIG. 2, the near-infrared lamp 11 And a near-infrared heater module 10 made of an elliptical reflector plate 13 and a housing 12 including a structure of maximizing a cross-sectional area of the cooling fin 14 on one side thereof may be used.

In particular, the near-infrared lamp 11 has a wavelength in the range of 0.76 to 1.4 μm and has a very high permeability, so that the near-infrared lamp has a physical property of high radiation energy density capable of completely penetrating to the bottom of the coating layer and completely drying the object within a few seconds. It can be investigated. Since such near infrared rays are usually radiated when the heat source is heated to a high temperature of 2,500 to 3,500 degrees Celsius or more, for example, a durable heat source such as a tungsten coil is used.

In addition, as shown in FIG. 2, the housing 12 has a lamp holder 15 formed therein so that the near-infrared lamp 11 can be attached and detached, and one side of the elliptical reflector 13 is the near-infrared lamp. It is a shape surrounding (11). In addition, the near-infrared lamp 11 fastened by the lamp holder 15 inside the housing 12 can be disassembled and replaced or cleaned easily.

In addition, the elliptical reflector 13 is provided to be integrally provided with the housing 12 so as to reflect the near infrared rays irradiated from the near infrared lamp 11 to be concentrated in the longitudinal direction of the object.

  In this case, preferably, the cold air introduced by the compressed air supply unit 30 cools the NIR lamp 11 through the compressed air passage 19 inside the housing 12.

 On the other hand, when the housing internal temperature sensor 20 is determined to overheat because the temperature in the housing is higher than the set temperature, and transmits a signal to the controller so that the power supplied to the near infrared lamp can be cut off.

Meanwhile, in cooling the heat generated when the linear NIR heater module of the present invention operates, the elliptical reflector is made close to the NIR heater lamp to radiate the NIR to an object to be dried, but to receive heat generated from the lamp. The elliptical reflector plate 13 receiving heat is cooled by heat flowing through the internal coolant passage 16 to more easily cool the linear near infrared heater module to minimize the influence of heat, thereby cooling the linear near infrared heater module. It is to provide a cooling method to ensure the cooling performance in the same shape without design added to increase the capacity of the near-infrared lamp 11 by ensuring a more excellent cooling performance.

  The coolant supplied by the coolant supply device 31 enters the coolant inlet 17 and rises to an arbitrary temperature while passing through the coolant passage 16 of the linear near infrared heater module, and exits to the external tank through the coolant outlet 18. However, when entering the near-infrared drying module is cooled to the low temperature already set.

In addition, the object temperature sensor 21 is installed at the final output end of the near-infrared drying (1), the object temperature signal to the controller 9 to measure the temperature of the object (D) during drying to achieve optimal drying By applying the, the control unit 9 detects the temperature state of the object D being dried by the object temperature sensing means and compares the reference value (optimal drying curve according to the object) of the near-infrared heater module 10 The number of operations and power can be adjusted.

That is, if the temperature of the object (D) is lower than the reference value, the control unit (9) determines that the dry state is insufficient, increases the amount of near-infrared radiation of the near-infrared heater module 10, and the temperature of the object (D) is the reference value If higher, it is determined that the dry state is exceeded to prevent unnecessary waste by reducing the near-infrared radiation dose of the near-infrared heater module 10.

  In addition, when comparing the heat irradiation method by the near infrared rays of the present invention and the heat transfer method by the conventional hot wind, as shown in Figure 6, the linear near infrared heater module of the present invention, the near-infrared, that is, the object using the permeable thermal energy The drying process proceeds quickly within a few seconds from the lower bottom surface to the upper surface of the coating applied to the paint. As the upper surface is finally dried, the drying curve of the present invention reaches a 100% drying rate by forming a proportional curve with time. The time t1 is very short.

   However, in the conventional hot air drying method, drying is performed from the upper surface to the lower bottom surface of the coating layer applied to the object by using hot air, that is, contact heat transfer energy, and since the lower bottom surface is finally dried, Due to the difficulty of transferring the heat energy to the bottom surface due to the interference of the dried top surface, the time (t1) to reach 100% complete drying is very long or even only the top surface is dried at the end, and the bottom surface is not dried. There is a case where complete drying is impossible such as not being able to.

   On the other hand, in the case of the drying of the coating applied to the inside of the object, the drying by heat transfer is inevitable because the near infrared is not irradiated to the inside of the object, unlike the outside where the near infrared is directly irradiated. Since the heating to the temperature is possible, it is possible to replace the large-size drying furnace used in the prior art as shown in FIG. However, since the external paint of the object has a strong radiant energy penetrating inside and evaporates the solvent component in a short time, it dries and hardens to the inside of the coating layer of the object at the same time, while at the same time heat conducts to a high temperature with the internal paint. Since bubbles are generated, as shown in FIG. 1, if the cooling device 21 is configured between each near-infrared heater module 10 so that the temperature does not rise rapidly, the inside can be dried and cured without bubbles.

  On the other hand, as shown in Figure 1, the control unit 9 according to an embodiment of the present invention, as shown in Figure 6 power switch, emergency switch, object input and output detection means, product temperature detection means, near infrared heater module inside As described above, the temperature sensing means, the heater output selection switch, and the like, the sensing means consisting of various sensors and switches sense the drying progress state of the object to separate the individual power driver of the near-infrared lamp or the solenoid valve of the air knife. It is possible to control the solenoid valve driver and the like to open and close, and to display information such as product temperature and operating time detected from various means.

Referring to the control method according to the operation process of the above-described near-infrared drying apparatus of the present invention in more detail, the control method of the near-infrared drying apparatus of the present invention, as shown in Figure, the preparation step for preparing the first equipment (SI ), And a plurality of objects to be dried in the drying chamber (S2) and the completion step (S3) for loading / unloading the object.

      That is, the preparation step (S1) is a reference value setting step of setting the reference value of the control unit, such as the irradiation amount or irradiation time of the near-infrared lamp, various reference values, programs and set values may be input to the control unit.

      Subsequently, the drying step (S2), the object input detection step (S21) for detecting the input of the object by the object detection sensor of the object transfer device, and near-infrared to irradiate the object detected the input to dry the near infrared Near-infrared heater module operation step (S22) that the heater module is operated, and the object output detection step (S23) for detecting the output of the object is irradiated by the object detection sensor of the object transfer device.

     Here, the near-infrared heater module operation step 22, the object temperature sensing step 221 for detecting the temperature of the object in a non-contact manner, and the internal temperature detection step of the heater module for sensing the temperature inside the near-infrared heater module for irradiating the object ( 222) and a control signal to a power driver of the near-infrared lamp to determine the degree of drying of the object based on the sensed temperature of the object to operate only the necessary near-infrared lamp among the plurality of near-infrared lamps mounted inside the heater module. It comprises a step of adjusting the near-infrared lamp number (S223) for applying the control and the near-infrared heater internal temperature detection step (S224) for determining the degree of overheating based on the detected internal temperature of the near-infrared heater module.

     Subsequently, the completion step (S3) is a step of unloading the object to be completed from the drying chamber to the outside by the control unit that detects the drying progress state of the object by the non-contact temperature sensor to control the object transfer device (S31) ), And loading the undried new object into the drying chamber (S32), and after this completion step (S3), the drying step is repeated and a large number of objects can be completely dried in rapid succession. .

  The present invention is not limited to the above-described embodiments, and of course, modifications may be made by those skilled in the art without departing from the spirit of the present invention.

  For example, in the exemplary embodiment of the present invention, although the light rays irradiated to the object are limited to near infrared rays, all kinds of light rays capable of transferring heat energy may be applied, and the object may also be any kind of object or animal or plant that needs to be dried.

 Therefore, the scope of the claims in the present invention will not be defined within the scope of the detailed description, but will be defined by the following claims and their technical spirit.

As described above, the linear near-infrared heater module of the present invention uses an output of 3,000 to 3,500K or more for an object requiring local drying to increase the share of near-infrared rays having a wavelength band of 0.76 to 1.4 mm, thereby increasing the energy density to 800 (KW / It is possible to dry within 5 ~ 10 seconds because of quick drying and hardening of the coating part by using the physical property of high thermal density of ㎡). In addition, since the strong radiation energy penetrates into the paint of the object to be evaporated instantaneously evaporating the solvent component, the process is completed in a few seconds without any problem in the instant drying and curing to the inside of the coating layer of the object. However, in the case of the drying of the paint applied to the inside of the object, drying is inevitable because the near infrared is not irradiated to the inside of the object, unlike the outside where the infrared is directly irradiated. It is possible to replace the large drying furnace used in the prior art because of the heating to temperature. However, since the external paint of the object has a strong radiant energy penetrating inside and evaporates the solvent component in a short time, it dries and hardens to the inside of the coating layer of the object at the same time, while at the same time heat conducts to a high temperature with the internal paint. Since bubbles are generated, a cooling device is constructed between the near-infrared heater modules so that the temperature does not rise rapidly, and the inside can be dried and cured without bubbles.

  In addition, the other object of the present invention is not a heat transfer method, but a near-infrared ray irradiation method with a short wavelength of 0.76 to 1.4 μm, so the design of equipment is free in the installation environment, and the heater preparation time is short because the heater is operated only by electricity. It is to provide a linear near-infrared heater module that can be operated only in close proximity to reduce the electricity consumption time.

In addition, another object of the present invention is a near-infrared irradiation type, so that no harmful gas is generated in the heater, and it is easy to discharge the harmful gas generated in the object to provide an environmentally friendly linear near-infrared heater module.

In addition, in cooling the self heat generated when the linear NIR heater module operates, the housing is basically shaped as a cooling fin to optimize the cooling cross-sectional area, and at the same time, the external compression into a passage formed inside the housing including an elliptical reflector. By allowing air and coolant to flow, it is possible to cool the heat conducted by the drying lamp to ensure excellent cooling performance.

1 is a schematic view showing a drying and curing apparatus using a linear near infrared heater module according to an embodiment of the present invention

Figure 2 is a schematic diagram showing a linear near infrared heater module according to an embodiment of the present invention

   3 is a schematic view showing an external drying method of an object according to the prior art.

   4 is a schematic view showing an internal drying method of an object according to the prior art.

   FIG. 5 is a conceptual diagram illustrating characteristics of a drying range and a near infrared heater of FIG. 1. FIG.

   Figure 6 is a graph showing a comparison of the drying rate with time between the conventional general drying system and the near-infrared heater system of the present invention

   7 is a block diagram showing a control method of the present invention

   8 is a block diagram showing a control unit of the present invention

   9 shows a wavelength range of near infrared rays.

   10 shows the temperature radiation characteristics of the near infrared lamp.

Claims (10)

A method of drying and curing an object, such as a circular or rectangular can, which is coated locally and outward in a local, longitudinal direction using a linear near infrared drying and curing device. A drying chamber in which an inlet is formed at one side and an outlet is formed at the other side; An object transport apparatus for loading an object through an inlet of the drying chamber and unloading through an outlet; A linear near-infrared heater module installed inside the drying chamber and linearly irradiating near-infrared rays to the object with a near-infrared lamp generating near-infrared rays; And a compressed air injector configured between each linear near infrared heater module. And an internal temperature sensing means for sensing an internal temperature of the linear near infrared heater module to prevent overheating. And a controller for sensing a drying progress state of the object by a temperature sensing means and applying a control signal to the near infrared heater module. Linear near infrared drying and curing device comprising a. The method of claim 2, The drying chamber is a linear near infrared drying and curing device, characterized in that the ventilator is installed to discharge the heat inside the drying chamber to the outside The method of claim 2, The object transfer device is a transfer device installed through the drying chamber, the object detecting means for applying a position signal of the object to the control unit at the irradiation start point and the irradiation end point of the near infrared heater module is installed. Linear near infrared drying and curing device. The method of claim 2, The linear near infrared heater module comprises a near infrared lamp for generating near infrared; A lamp holder is formed inside to allow the removal of the near infrared lamp, and an elliptical reflector structure for reflecting the near infrared light emitted from the near infrared lamp in a longitudinal direction by surrounding the near infrared lamp and a cooling fin structure to maximize cooling function. A housing having a structure in which a cross-sectional area is maximized; And a compressed air supply unit installed in the housing to cool the heat generated by the lamp itself with compressed air. And a cooling water supply unit cooling the heat conducted to the housing by the near infrared lamp with cooling water. And a temperature sensing means of a heater module for detecting a cooling state by sensing a temperature inside the housing with a housing internal temperature sensing means of a linear NIR heater module. The method of claim 2, Compressed air injection device is a linear drying and curing apparatus, characterized in that between the respective infrared infrared heater modules installed in the longitudinal direction to dry and cure the coating applied to the outside and inside of the object without bubbles. The method of claim 5,  When the heat generated by heat generated in the near-infrared lamp to generate near-infrared light from the near-infrared lamp is transferred to the housing, the electrical material configured inside the housing, that is, the wire is higher than the temperature not to be damaged. And a means for sensing and blocking electrical energy to prevent a problem of overheating. The method of claim 5,  During the construction of the housing, the cooling water supply channel is integrally formed on one side of the housing, and the cooling water connection for cooling the heat conducted from the near-infrared lamp through the oval reflector and the lamp holder of the housing is connected to the interior of the housing. Linear near-infrared drying and curing apparatus, characterized in that configured outside the damage. An inlet is formed at one side, the drying chamber is formed with an outlet on the other side, the object transfer device for loading the object through the inlet of the drying chamber, the unloading through the outlet, the near-infrared lamp installed in the drying chamber, generating near infrared In the control method of the near-infrared drying apparatus comprising a; a control unit for detecting a dry progress state of the object by a linear near-infrared heater module for irradiating near-infrared to the object and a non-contact temperature sensing means and applying a control signal to the near-infrared heater module. ,  A reference value setting step of setting a reference value of the controller such as an irradiation amount or an irradiation time of the near infrared heater module; An object input detection step of detecting an input of an object by an object detection means of the object transfer device, a step of operating a near-infrared heater module in which a near-infrared heater module is operated to irradiate and dry the near-infrared ray to the detected object; A drying step comprising an object output detection step of detecting an output of the object that has been irradiated with the object detection means of the object transfer device; And  The control unit that detects the drying progress state of the object by the non-contact temperature sensing means controls the object transfer device to unload the completed object from the drying chamber to the outside, and to load the undried new object into the drying chamber. step;  Control method of a linear near infrared drying and curing apparatus comprising a. The method of claim 9,   The near infrared heater module operation step,  An object temperature sensing step of non-contactly detecting the temperature of the object;  A near-infrared lamp and a near-infrared heater module internal temperature sensing step of sensing a temperature of the near-infrared lamp and the near-infrared heater module for irradiating an object;  The control unit determines a degree of drying of the object based on the detected temperature of the object and applies a control signal to the power driver of the near infrared lamp to operate only the necessary near infrared lamp among the plurality of near infrared lamps mounted in the near infrared heater module. Adjusting the number of movable near infrared lamps; And  Adjusting the internal temperature of the near infrared heater module to determine a degree of overheating of the near infrared heater module based on the sensed internal temperature of the near infrared heater module to apply a control signal to a cooling device installed inside the near infrared heater module;   Control method of a linear near infrared drying and curing apparatus comprising a.