JPH0554991U - Paint drying equipment for electronic components - Google Patents

Abstract

(57) [Summary] [Purpose] The temperature distribution in the drying oven is uniform and the insulating paint for electronic parts such as resistors and the paint such as display ink are baked efficiently. [Structure] A hot air generator 7 provided with a control unit 9 for controlling hot air is connected to a drying furnace 1 provided with a chain conveyor 4 for drying electronic components 2. [Effect] The temperature of the electronic component coated with the coating material can be increased quickly by direct heating with hot air, and the baking time of the coating material can be shortened. It is possible to downsize the drying furnace and reduce operating costs.
In addition, the hot air makes the temperature distribution in the drying oven uniform,
Insufficient paint baking, burning, and lead wire oxidation can be prevented, improving yield.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a paint drying apparatus for electronic parts, such as a resistor and the like, which is used for baking insulating paint for electronic parts and display ink.

[0002]

[Prior Art]

 A conventional paint drying device that bakes insulating paint for electronic components such as resistors and paint such as display ink uses an electric heating element such as a sheathed heater installed in the lower part of a tunnel-type drying furnace to dry the paint. A structure is adopted in which a lead wire having the electric parts at both ends is supported and conveyed by a chain conveyor arranged in a furnace and dried.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional paint drying apparatus, since the electronic parts are dried by the radiant heat of the electric heating element such as the sheath heater, the temperature distribution in the drying furnace is not uniform, and the paint such as the insulating paint and the display ink is not baked. Sufficient or scorching of the paint and oxidation of the lead wires of the electronic components occur. In addition, there was a problem that the furnace length was long and required a large installation space.

An object of the present invention is to solve the above problems, to provide a paint drying apparatus for electronic parts, which is capable of efficiently baking a paint, is effective in energy saving measures, and is economical.

[0005]

[Means for Solving the Problems]

 The paint drying apparatus for electronic parts of the present invention comprises a drying oven provided with a chain conveyor that supports and conveys lead wires at both ends of the electronic parts to be dried, and a hot air generator connected to the drying oven by a hot air blowing path. A control unit that detects the hot air temperature and controls the hot air temperature and the air volume.

[0006]

[Action]

 The paint drying device for electronic parts of the present invention uses a hot air generator in which the temperature and volume of hot air are adjusted by the control unit according to the baking conditions of the paint such as insulating paint and display ink applied to the electronic parts. The generated hot air is blown to the drying furnace through the hot air blowing furnace passage to dry the electronic component carried while supporting the lead wire. The electronic parts coated with the coating material have a high rate of temperature rise due to direct heating with hot air, and can shorten the baking time of the coating material and at the same time shorten the length of the drying furnace. The operating cost of can be reduced. Further, the blowing of the hot air makes the temperature distribution in the drying furnace uniform in the cross section in the furnace length direction, the baking of the paint is sure, and there is no burning or oxidation of the lead wires of electronic parts.

[0007]

【Example】

 A configuration of an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a drying furnace composed of a furnace body 1a made of a heat-resistant heat insulating material and an upper cover 1b covering the upper part of the furnace body 1a. A chain conveyor 4 that supports and conveys the lead wire 3 is provided. A heat-resistant hot air control plate 5 is provided below the inside of the furnace body 1a of the drying furnace 1. Further, a hot air inlet 6 is opened in the lower part of the drying furnace 1, and a hot air generator 7 is connected to the hot air inlet 6 by a hot air blow passage 8. The hot air generator 7 has a control unit 9 for controlling the hot air temperature and the air volume, a thermocouple 11 is provided at the hot air outlet 10 of the hot air generator 7, and the control unit is controlled by the temperature detected by the thermocouple 11. 9 controls the hot air generator 7.

Next, the operation of this embodiment will be described.

The hot air generated from the hot air generator 7 whose temperature is detected by the thermocouple 11 and controlled and controlled by the controller 9 is blown into the drying furnace 1 from the hot air outlet 10 through the hot air blowing passage 8. To be done. The hot air passes through the heat-resistant hot-air control plate 5, heats the electronic component 2 supported by the lead wire 3 and conveyed by the chain conveyor 4 in the drying furnace 1, and insulates the electronic component. Bake paint and display ink. The temperature inside the drying oven 1 is controlled by controlling the hot air generator 7 by the control unit 9 by detecting the temperature of the thermocouple 11, so that the temperature and volume of the hot air inside the drying oven are adjusted. The distribution is kept uniform.

The thermocouple 11 can be provided at appropriate positions near the hot air outlet 10 through which hot air passes, the hot air blowing passage 8 and the electronic component 2.

[0012]

[Effect of the device]

 According to the present invention, the temperature and volume of the hot air can be adjusted by the control unit according to the baking conditions of the paint such as the insulating paint and the display ink applied to the electronic parts, and the hot air generated from the hot air generator can be supplied to the hot air blowing passage. Since the air is blown to the drying oven through direct heating, the heating rate of electronic parts is high due to the direct heating of hot air, and the baking time of paint can be made shorter than the conventional processing time, and at the same time the oven length of the drying oven is shortened. It is possible to reduce the power consumption for operating the device. Also, the blowing of hot air makes the temperature distribution in the drying oven uniform in the cross section in the oven length direction, ensures the baking of the paint, prevents burning and oxidation of lead wires of electronic parts, and improves the yield. To do.

[Brief description of drawings]

FIG. 1 is a sectional view of a hot-air drying oven in the oven length direction showing an embodiment of the present invention.

[Explanation of symbols]

 1 Drying Furnace 2 Electronic Component 3 Lead Wire 4 Chain Conveyor 7 Hot Air Generator 8 Hot Air Blower 9 Control Section

Claims (1)

[Scope of utility model registration request] 1. A drying oven provided with a chain conveyor that supports and conveys lead wires at both ends of an electronic component, a hot air generator connected to the drying oven by a hot air blowing path, and hot air by detecting hot air temperature. A paint drying apparatus for electronic parts, comprising: a control unit for controlling temperature and air volume.