JPH0550714U - Mold coil - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive molded coil that protects the insulated wire for output of the molded coil and prevents leakage of molding resin from the insulated wire for output. [Structure] An insulated conductive wire is wound around a coil, and insulated wire for coil outlet is connected to the end of the insulated conductive wire at the beginning and end of the coil, and a fluorine wire is attached to the insulated wire for coil outlet derived from the coil. A molded coil is constructed by inserting a tube made of resin and sealing the outer circumference of the coil with an insulating resin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molded coil.

[0002]

[Prior Art]

 Conventionally, a molded coil 6 as shown in FIG. 3 is often used in order to improve the insulation resistance, humidity resistance, stain resistance, etc. of the coil. The mold coil 6 was manufactured as follows. First, the insulated conducting wire 1 made of a magnet wire is wound a predetermined number of times around a coil bobbin 2 made of insulating resin to form a coil, and PVC, PE, PTFE, etc. are formed at both ends of the coil insulating conducting wire 1 at the beginning and end of winding. The insulated electric wire 4 for coil output provided with the insulating coating layer is soldered. Next, the coil forming insulated wire 4 is set in the upper mold 8 and the lower mold 9 for coil forming, and the insulated wire 4 for coil outlet is formed on the joint surface of the upper mold 8 and the lower mold 9. After being set in the guide groove and guided out of the mold, the upper mold 8 and the lower mold 9 are closed and a thermoplastic resin such as polyester resin is injected from the molding machine into the mold. After the resin has cooled and solidified, the coil is taken out from the mold, and the outer circumference of the coil is sealed with insulating resin, and the molded coil 6 from which the insulated wire for output 4 is led out is formed.

[0003]

[Problems to be solved by the device]

 During the molding of the molded coil, the insulated wire 4 for the coil outlet is set in the groove for leading out the insulated wire for the coil outlet formed on the contact surface of the upper die 8 and the lower die 9 and is set outside the die. Be derived. For this reason, the insulated wire 4 for coil output is sandwiched between the upper and lower molds 8 and 9, and scratches 13 or cracks are generated in the insulating coating layer of the insulated wire 4 for coil output, or the coil wire The insulating coating layer of the output insulated wire 4 is deformed by the heat and pressure of the molding resin that is press-fitted into the mold, for example, as shown in FIG. As a result, the molding resin flows out and the mold releasability deteriorates. Therefore, a silicon insulated wire having excellent heat resistance is used as the insulated wire 4 for coil outlet, but there is a drawback in terms of price. The present invention solves the above problems by a simple means and provides an inexpensive molded coil.

[0004]

[Means for Solving the Problems]

 Wind the insulated wire around the coil, connect the insulated wire for coil outlet to the end of the insulated wire at the beginning and end of this coil, and remove a part of the insulated wire for coil outlet derived from the coil. In a molded coil in which the outer circumference of the coil is sealed with an insulating resin, a tube made of fluororesin is inserted through the insulated wire for coil outlet that is led out from the coil, and the outer circumference of the coil is sealed with an insulating resin. Configure the mold coil.

[0005]

[Action]

 The insulated wire for coil output is covered and protected with a fluororesin tube, and the insulated wire is free from scratches and cracks. Further, the fluororesin tube has excellent heat resistance, so that the deformation of the insulating coating layer of the insulated wire for coil outlet can be prevented and the resin leakage can be prevented.

[0006]

【Example】

 The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a mold coil according to the present invention, and FIG. 2 is a diagram showing an outline of molding a mold coil by a mold. The mold coil of the present invention is formed as follows.

First, the coil 3 is formed by winding the insulating wire 1 made of a magnet wire around the coil bobbin 2 made of insulating resin in advance by a predetermined number of turns. The PVC insulation covered electric wire 4 is soldered to both ends of the winding of the insulated wire 1 of the coil 3 at the beginning and the end of the winding as an insulated wire for coil outlet. Then, the heat-shrinkable tube 10 made of fluororesin such as FEP, PFA, TFE having a predetermined inner diameter is inserted into the coil outlet insulated wire 4 led out from the coil 3. The length of the heat-shrinkable tube 10 is appropriately determined by the length of the groove for leading out the lead wire formed in the mold joint portion 7 of the upper and lower molds 8 and 9 for molding the mold coil. Then, the coil 3 is set in the lower die 9, and the insulated wire 4 for the coil outlet, in which the heat-shrinkable tube 10 is inserted, is led out of the outlet wire of the die joint portion 7 of the lower die 9 of the tube 10. It is inserted along the groove portion for use and led out of the lower mold 9. Next, the upper mold 8 is set on the lower mold 9. Then, the polyester resin 11 is injected from the molding machine into the mold, and after the resin 11 is cooled and solidified, the upper and lower molds 8 and 9 are separated to obtain the mold coil 6.

In the obtained coil 6, the insulated wire 4 for coil output is covered and protected by the heat-shrinkable tube 10 made of fluororesin having excellent heat resistance, so that the insulated wire 4 for coil output is scratched or cracked. There is no possibility of occurrence of heat generation, and there is no deformation of the insulating coating layer, preventing resin leakage.

[0009]

[Effect of the device]

 According to the present invention, damage and cracks in the wire for insulated wire, which is apt to occur during molding of a molded coil, or deformation of the insulation coating layer of the wire for insulated wire, which is apt to occur at the time of forming a molded coil, can be achieved by a simple method. The molded coil of is obtained. In addition, resin leakage during molding is prevented, and the mold releasability is greatly improved, which contributes to improved productivity and makes it possible to obtain a cheap molded coil.

[Brief description of drawings]

FIG. 1 is a perspective view of a molded coil showing an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of molding coil molding of the present invention.

FIG. 3 is a perspective view of a conventional mold coil.

[Explanation of symbols]

 1 Wire for coil 2 Coil bobbin 3 Coil 4 Insulated wire for output 6 Molded coil 7 Mold joint 8, 9 Mold 10 Heat shrinkable tube 11 Thermoplastic resin 12 Deformation 13 Scratch

Claims (1)

[Scope of utility model registration request] 1. An insulated wire for winding a coil, wherein an insulated wire is wound around a coil, and an insulated wire for exiting the coil is connected to ends of the insulated wire at the beginning and end of the coil, and the insulated wire for exiting the coil is led out from the coil. In a molded coil obtained by sealing the outer circumference of the coil with an insulating resin except for a part of the above, a tube made of fluororesin is inserted into the insulated wire for coil outlet derived from the coil, and the outer circumference of the coil is sealed with the insulating resin. A molded coil characterized by being stopped.