JPH04904A - Manufacture of parabolic antenna - Google Patents

Abstract

PURPOSE:To mass-produce products immune to rainwater with high efficiency by spraying zinc to a projecting part on the back of a parabolic reflector formed integrally with a supporting frame by synthetic resin, and protecting it by applying a coating layer onto the projecting part. CONSTITUTION:A parabolic antenna surface 1 and a supporting frame 7 are integrally formed by the synthetic resin, and a zinc layer 2 is formed by spraying the metallic particles of zinc to the projecting part on the back of the parabolic surface 1. Further, a coating layer 3 is applied onto the zinc layer 2 and a protection film is formed. At a prescribed position to the supporting frame 7, a detector 5 is fitted by an arm 4 and fixed to a pole 6.

Description

[Detailed Description of the Invention] Industrial Field of Application This invention is applicable to mass production, electromagnetic wave reflection, durability, etc. of a rose antenna for receiving satellite broadcasting, as satellite broadcasting is in full swing and is becoming widespread in general households. This is an excellent and economical method for manufacturing a rose antenna.

2. Description of the Related Art Various parabolic antennas have been manufactured for receiving satellite broadcasts. There are pressed aluminum products, gui-cast products, metal foils, and composite products of carbon fiber, metal fiber, etc. and synthetic resin, but there are currently difficulties in manufacturing them.

Problems that the invention aims to solve Satellite broadcasting for general households has been realized, but the broadcasting radio waves are extremely weak, one tenth of the terrestrial broadcasting radio waves, so it is necessary to catch the radio waves efficiently, so a rose antenna is used. The basic conditions required for this are 1. The reflective surface has good electromagnetic wave reflection performance, and 2. The shape of the reflective surface maintains the surface accuracy as designed and always matches the frequency range to be received. 3. Light weight and small size.
4. It has high mechanical strength. 5. It is inexpensive. However, it has been difficult to satisfy the above conditions using conventional methods.

Means for Solving the Problems In the present invention, the reflecting mirror of a parabolic antenna and its supporting frame are injection molded from synthetic resin. Next, zinc is sprayed onto the convex surface of the reflector to efficiently reflect weak radio waves from the broadcasting satellite and focused on the detector.Then, a coating is applied to protect the zinc sprayed surface.

Function When zinc is sprayed onto the convex surface of a parabolic antenna molded from synthetic resin, the part where the zinc metal particles collide with the surface of the molded resin becomes flat, and the rear part becomes granular and adheres, as shown in the explanatory diagram of FIG. The attached surface has a metallic luster and reflects incoming radio waves well.

Example The present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing the state of adhesion of zinc metal particles sprayed with zinc on the convex surface of a parabolic antenna reflector injection molded from synthetic resin.

FIG. 2 is a schematic cross-sectional view of a parabolic antenna according to the present invention. 1, resin layer 2, zinc spray layer 3, coating paint layer 4. Arm 5, detector [BS converter].

In this invention, as shown in FIG. 2, the arm 4 of the rose antenna, the supporting frame with the mark, and the reflecting mirror are integrally molded by injection molding of synthetic resin. A zinc spray layer 2 is formed on the convex surface of the resin layer 1 of the reflecting mirror, and serves as a powerful radio wave reflecting mirror to focus satellite broadcast radio waves onto a detector 5. Next, the coating paint layer 3 is formed by overcoating the zinc spray layer 2 to protect it from rain and dew.

Effects of the Invention The present invention is constructed as described above. Since it is not a composite synthetic resin product such as metal foil, carbon fiber, or metal fiber, synthetic resin injection molding can be easily performed. As secondary processing of synthetic resin molded products, zinc spraying and overcoating can be performed, making it suitable for mass production. Additionally, because the back surface of the reflector is subjected to secondary processing, it is resistant to direct sunlight and exposure to rain and dew.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the state of adhesion of zinc metal particles sprayed onto the resin layer on the convex surface of the reflector of a parabolic antenna injection-molded with synthetic resin. Fig. 2 is an explanatory diagram showing the state of adhesion of zinc metal particles to the resin layer of the parabolic antenna of the present invention. FIG. 1 is a resin layer, 2 is a zinc spray layer, 3 is a coating paint layer, 4 is an arm, 5 is a detector [BS converter], 6 is a pole, and 7 is a support frame. Patent applicant Katsuaki Sakakibara, Representative Director of Art Kogyo Co., Ltd.

Claims (1)

[Claims] 1. In a parabolic antenna having a reflector, a detector {BS converter}, etc., the convex surface of the reflector is sprayed with zinc to efficiently reflect and detect weak radio waves from a broadcasting satellite. Focus on the vessel. 2'' The reflecting mirror and the support frame are manufactured by injection molding of synthetic resin. The mold is made so that the convex surface of the reflector focuses the weak radio waves from the broadcasting satellite. 3. After spraying zinc on the convex surface of the injection molded reflector,
Apply a coating to prevent rain and dew.