JPS5894332A - Molding of barrel part of electric float - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming the body of an electric float.

Electric floats used for fishing rivers house internal batteries, so they must be constructed so that these batteries can be replaced, and generally the body is divided into an upper body and a lower body. In many cases, it is divided and the two parts are screwed together.

By the way, in the above-mentioned electric float, the upper body and the lower body are molded separately, so when they are screwed together, the watertightness tends to be incomplete due to the meshing part of the screws. Normally, an OIJ song is interposed between the connection part of the upper fuselage and lower fuselage to improve water retention, but the O-ring may be lost when removing the battery when not in use or replacing the battery. In addition, there is a problem that water honey cannot be retained well for a long period of time due to damage to the ring itself.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for forming the body of a one-piece electric float that has excellent water resistance.

In this invention, a heat-softened thermoplastic resin tube is placed on the outside of a single-tapered round shaft formed in a core for forming a lower fuselage, and a connecting screw tube is formed by shrinking and cooling the tube. , a heat-softened thermoplastic resin tube is placed over the connecting screw joint and the entire length of the core for forming the lower fuselage, and this is heated and contracted to form the lower fuselage;
After cooling, both molded products are removed from the core, and the connecting threaded tube is inserted into the end of the pre-formed upper body and integrated by gluing. It is strained.

Here, as the thermoplastic resin tube, celluloid, vinyl chloride resin, polyethylene, polypropylene, nylon, or the like can be used.

Hereinafter, the method of the present invention will be explained in order of steps based on the accompanying drawings.

As shown in FIG. 1, the lower fuselage forming core 1 has a tapered shaft portion 3 extending from the end of a tapered rounded shaft portion 2. As shown in FIG. When a heat-softened thermoplastic tube is placed on the outside of the round thread-formed shaft portion 2 and this is heat-shrinked, this tube comes into close contact with the entire outer surface of the round thread-formed shaft portion 2 to form a connecting threaded cylinder 4. Can be done.

Next, as shown in FIG. 2, a thermally softened tapered cylindrical thermoplastic tube 5 is placed over the outside of the range from the connecting screw tube 4 to the tip of the core 1 for forming the lower fuselage. When heated and shrunk, as shown in FIG. 3, a lower body 6 is formed that is in close contact with the entire outer surface of the connecting threaded tube 4 and the outer periphery of the tapered shaft portion 3 of the core 1, and has a round threaded portion 6'. Can be done.

The thermoplastic tube 5 may be heated by placing it in a heating furnace, placing it in a container and soaking it in boiling water, or the like.

After molding the lower fuselage 6, it is water-cooled or naturally cooled, and after cooling, both molded products are removed from the lower fuselage molding core 1, thereby obtaining two articles that can be threadedly engaged with each other. The large diameter end of one of the connecting threaded tubes 4 is
As shown in FIG. 4, a T-piece is formed in advance and inserted into the end of the upper body 7 and adhered thereto, and a ring-shaped packing holder 8 is attached to the outside of the connection part as required.

Further, a leg 9 is inserted and glued to the tip of the lower body 6, and a ring-shaped packing holder 10 is attached to the outside of the large diameter end, if necessary.

Therefore, by threading the connecting screw tubes j4 of the lower body 6 and the upper body 7 together and tightening them, a water-tight internal hollow is created in which the round threaded portions 6' are in close contact with each other, as shown in FIG. I wish I could get an electric boat.

As shown in Fig. 6 and Fig. 7, this electric interior contains a battery 11 and a light emitting element 1 that uses the battery 11 as a power source.
2 and the necessary wiring are provided.

In addition, by interposing the O-ring 13 between the seal holder 8 of the upper body 7 and the seal holder 10 of the lower body 6, the watertightness of the connection portion can be made more complete.

As described above, in this invention, the round threaded portion of the lower body is molded using the connecting threaded tube that is inserted and connected to the upper body as an original shape, so that the connecting screw connected to the upper body can easily be screwed into the round threaded portion of the lower body. By engaging and tightening the
Both threaded portions are in close contact with each other, and as a result, it is possible to obtain a body of a one-piece electric float with excellent watertightness.

In addition, the connecting screw tube and the lower body can be molded by fitting a heat-softened thermoplastic resin tube to the outside of the lower body molding core and heat shrinking it, making it extremely easy to manufacture both. It is.

[Brief explanation of drawings]

Figures 1 to 3 are side views showing the molding order of the connecting threaded tube and the lower body, Figure 4 is a partially cutaway front view of the same connecting screw tube connected to the upper body, and Figure 7. 1 is a front view of the electric float formed on the same body as above. 1... Core for forming the lower body, 2... Round screw shaft, 3
...Tapered shaft portion, 4...Connecting threaded tube, 5...Thermoplastic tube, 6...Lower body, 7...Upper body Patent applicant Mitsugu Marose, agent Kama 1) Sentence 2

Claims (1)

[Claims] A heat-softened thermoplastic resin tube is placed over the outside of the lower fuselage molding core, which is integrally formed with a tapered shaft portion from the end of the tapered round screw molded shaft portion.This tube is then placed outside the round screw molded shaft portion. A connecting screw tube is formed by shrinking the connecting screw tube, and a heat-softened thermoplastic resin tube is placed on the outside of the connecting screw tube over a range extending from the connecting screw tube to the tip of the tapered shaft portion of the core, and this is heated and contracted. Shape the lower fuselage,
The cooling backward molded product of the lower fuselage is removed from the outside of the core, and the large diameter end of the connecting screw is inserted into the inside of the pre-formed cylindrical upper fuselage and integrated by gluing. A method for forming the body of an electric float by twisting engagement with the lower body.