JP2007095924A - Suction element of solenoid-operated valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction element of a solenoid-operated valve which can be kept low in material cost, processing cost, and assembling cost and can be manufactured at a relatively low cost without any deterioration in quality. <P>SOLUTION: The main body 11 of the suction element which is formed by metal injection molding or the like is formed with an annular groove 12 corresponding to the shape of a shading coil 20 to be obtained. The material 21 of the shading coil composed of a low melting-point metal material is poured in a molten state into the annular groove 12, and integrated with the main body 11 of the suction element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an attractor for an electromagnetic valve in which a ring-shaped Kumatori coil (also referred to as a shading coil) is assembled.

  A general structure of a magnetic valve attractor is shown in FIGS. 5 and 6 (see also Patent Document 1 below). As shown in the figure, the suction element 10 (the main body part 11) is made of stainless steel or the like as a material, and is manufactured into a stepped column or a bottomed cylinder by cutting, and on the plunger side, a ring-shaped ring having a rectangular cross section is produced. An annular groove 12 having a rectangular cross section is formed into which the bear coil 20 is press-fitted, and a female screw portion 14 to which a mounting bolt is screwed is provided on the opposite side.

  The Kumatori coil 20 is incorporated in order to suppress fluctuations in suction force and reduce noise (beat noise) when an AC power source is used as a power source for a solenoid valve. Usually, a copper material is used as the material thereof. Manufactured by cutting.

Japanese Patent Laid-Open No. 10-103556

  As described above, the Kumatori coil 20 is usually manufactured by cutting using a relatively expensive copper material as a material, and press-fitted into the annular groove 12 provided in the suction element main body 11, and then with an adhesive. It is designed to be fixed. Therefore, the attracting element 10 provided with the kumatori coil 20 is expensive due to increased material cost, processing cost, and assembly cost.

  The present invention has been made in view of the above circumstances, and its object is to reduce the material cost, processing cost, and assembly cost, and it can be manufactured at a relatively low cost without degrading quality. It is to provide an attractor for a solenoid valve.

  In order to achieve the above object, one of the attractors of the solenoid valve according to the present invention is a ring in which the attractor body is formed by metal injection molding, and the attractor body is manufactured by a method other than cutting. It is characterized by the fact that it is assembled in the shape of a coiled coil.

  The other one is characterized in that the attractor body is manufactured by a method other than metal injection molding, and a ring-shaped kumatori coil manufactured by a method other than cutting is assembled to the attractor body. .

  In a preferred embodiment, the Kumatori coil is formed by metal injection molding or powder metallurgy.

  In addition, when the suction element main body is formed by metal injection molding, preferably, the Kumatori coil manufactured by a method other than cutting is integrated with the suction element main body by insert molding.

In another preferred embodiment, the attractor body and the kumatori coil are integrally formed by two-color molding.
In this case, graphite, aluminum, brass or the like is used as the material for the Kumatori coil.

  In another preferred embodiment, an annular groove corresponding to the shape of the bear tricoil to be obtained is formed in the attractor main body, and a bear tricoil made of a low melting point metal material is poured into the annular groove in a molten state and integrated.

  In another preferred embodiment, an annular groove corresponding to the shape of the bear tricoil to be obtained is formed in the attractor main body, and a coomaly coil made of a low melting point metal material is loaded in the solid groove in a solid state, It is melted and integrated with each other.

  Examples of the low melting point metal material used as the material for the Kumatori coil include solder materials such as bismuth and indium, and brazing materials such as silver solder and phosphor copper solder.

  In the attractor of the solenoid valve according to the present invention, the Kumatori coil is formed by a method other than cutting such as powder metallurgy or injection molding, and without using a technique of bonding after press-fitting, the main body of the attractor or the Kumatori coil At the time of molding, the Kumatori coil is naturally (automatically) integrated at the same time, so that material costs, processing costs, and assembly costs can be kept low, and can be manufactured at a relatively low cost without degrading quality.

  Hereinafter, embodiments of an attractor of a solenoid valve according to the present invention will be described with reference to the drawings.

  In the drawings (FIGS. 1 to 4) used for explaining the suction element of each embodiment, for convenience, even if the material and the manufacturing method are different, each part of the suction element shown in FIGS. 5 and 6 described above. And a common reference numeral.

  In the first embodiment of the attractor of the solenoid valve according to the present invention, the attractor body 11 is formed by metal injection molding, and the attractor body 11 is formed by a method other than cutting, for example, a powder metallurgy. A shaped Komatori coil 20 is assembled.

More specifically, as shown in FIG. 1, when the attractor body 11 is molded using a metal injection mold 50, the metal injection molding is performed using the Kumatori coil 20 previously made by powder metallurgy as an insert. By placing in a predetermined manner in the mold 50, in this state, by injecting the molten metal material from the injection nozzle 51 into the cavity 53 and injection molding of the suction body 11, that is, by insert molding, The Kumatori coil 20 is integrated with the attractor body 11.
In this case, it is preferable to use graphite or the like that does not melt during injection molding (insert molding) of the attractor body 11 as the material of the bear tricoil 20.

  In the second embodiment of the attractor of the electromagnetic valve according to the present invention, the attractor main body 11 and the Kumatori coil 20 are integrally formed by two-color molding (double molding).

More specifically, as shown in FIG. 2 (A), first, the suction nozzle main body portion is formed by the mold 60 including the first nozzle 61, the cavity 63, the annular groove 12, the forming core 65, and the like. 11 is formed as the primary side (1st mold), and then, as shown in FIG. 2 (B), in the same mold 60 in which the second nozzle 12 is mounted instead of the core 65, The 2nd mold) is formed integrally with the annular groove 12 of the primary attractor body 11.
In this case, graphite, aluminum, brass or the like is used as the material of the Kumatori coil 20.

In the third embodiment of the attractor of the solenoid valve according to the present invention, as shown in FIG. 3, an annular groove 12 corresponding to the shape of the bearer coil 20 to be obtained is formed in the attractor 11 in advance. A Coatricoil material 21 made of a melting point metal material is poured into the annular groove 12 in a molten state and integrated.
In this case, a solder material such as bismuth or indium or a brazing material such as silver brazing or phosphor copper brazing is used as the material of the Kumatori coil 20.

In the fourth embodiment of the attractor of the solenoid valve according to the present invention, as shown in FIG. 4, an annular groove 12 corresponding to the shape of the Kumatori coil 20 to be obtained is formed in the attractor main body 11 in advance. The Coatricoil material 22 made of a low melting point metal material is loaded into the annular groove 12 in a solid state and is melted and integrated in a furnace.
In this case, a solder material such as bismuth or indium or a brazing material such as silver brazing or phosphor copper brazing is used as the material of the Kumatori coil 20.

  As described above, the suction element 10 according to the embodiment of the present invention can be formed without using a technique in which the Kumatori coil 20 is formed by a method other than cutting such as powder metallurgy or injection molding, and is bonded after being press-fitted. When the main body 11 or the Kumatori coil 20 is molded, the Kumatori coil 20 is naturally (automatically) integrated at the same time, so that material costs, processing costs, and assembly costs can be kept low, and comparison is made without degrading quality. Can be manufactured at low cost.

In addition to the above-described embodiment, for example, the attractor body portion 11 is formed by metal injection molding, and the kumatori coil 20 is manufactured by machining other than cutting such as pressing and forging, and then the attractor body portion. It is also conceivable to fix it with an adhesive after press-fitting it into the annular groove 12 provided in 10.
In this case, as the material of the Kumatori coil 20, it is preferable to use aluminum, brass, or the like that has a low material cost and good workability.

The figure which is provided for description of 1st Embodiment of the attractor of the solenoid valve which concerns on this invention. The figure which is provided for description of 2nd Embodiment of the attractor of the solenoid valve which concerns on this invention. The figure which is provided for description of 3rd Embodiment of the attractor of the solenoid valve which concerns on this invention. The figure which is provided to description of 4th Embodiment of the attractor of the solenoid valve which concerns on this invention. Sectional drawing which shows the general example of the attractant of a solenoid valve. The figure used for description of the manufacturing method of the conventional suction element.

Explanation of symbols

10 Aspirator 11 Aspirator Body 12 Annular Groove 20 Kumatori Coil

Claims (10)

  An attractor for an electromagnetic valve, characterized in that an attractor main body is formed by metal injection molding, and a ring-shaped Kumatori coil manufactured by a method other than cutting is assembled to the attractor main body.   An attractor for an electromagnetic valve, characterized in that an attractor body is manufactured by a method other than metal injection molding, and a ring-shaped Kumatori coil manufactured by a method other than cutting is assembled to the attractor body.   The attracting element for an electromagnetic valve according to claim 1 or 2, wherein the Kumatori coil is formed by metal injection molding.   The attracting element for an electromagnetic valve according to claim 1 or 2, wherein the Kumatori coil is formed by powder metallurgy.   The attracting element for an electromagnetic valve according to claim 1, wherein the Kumatori coil manufactured by a method other than cutting is integrated with the attracting element main body by insert molding.   The attracting element for an electromagnetic valve according to claim 1, wherein the attracting element main body part and the bear coil are integrally formed by two-color molding.   The magnetic valve attractant according to claim 5 or 6, wherein graphite, aluminum, brass or the like is used as a material of the Kumatori coil.   An annular groove corresponding to the shape of the Kumatori coil to be obtained is formed in the suction element main body, and a Kumatori coil material made of a low melting point metal material is poured into the annular groove in a molten state and integrated. Item 3. The magnetic valve attractor according to Item 1 or 2.   An annular groove corresponding to the shape of the Kumatori coil to be obtained is formed in the suction element main body, and a Kumatori coil material made of a low melting point metal material is loaded into the annular groove in a solid state and is melted and integrated in a furnace. The attracting element of the electromagnetic valve according to claim 1, wherein the attracting element is an electromagnetic valve.   The electromagnetic valve attractant according to claim 8 or 9, wherein a solder material such as bismuth or indium or a brazing material such as silver solder or phosphor copper solder is used as the material of the Kumatori coil.

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