JPS6353023B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing fishing rods, particularly tip rods and narrow diameter rods.

Conventionally, in order to increase the elasticity and strength of fishing rods, a highly elastic and high-strength reinforcing fiber sheet such as carbon fiber was polymerized on a wrapping sheet such as glass fiber and wound around the core metal.
It is already known to manufacture fishing rods, but for tip rods and small-diameter rods whose elasticity varies greatly, it is simply a matter of simply wrapping reinforcing fiber sheets with the same ply on the front and back over the entire length of the fishing rod, as in the past. However, the elastic strength etc. are reinforced almost uniformly over the entire length of the fishing rod, and there is a drawback that the elastic strength etc. cannot be reinforced while maintaining the necessary tone as a tip rod or a small diameter rod, that is, the characteristic that the elasticity changes greatly.

The present invention relates to a method for manufacturing a fishing rod that improves such defects, and the present invention relates to a method for manufacturing a fishing rod that is designed to improve such defects. A thermosetting resin-impregnated, high-elasticity, high-strength reinforcing fiber alignment sheet diagonally cut toward the tip is superimposed and placed, and the reinforcing fiber alignment sheet is wrapped around the beveled edge of the reinforcing fiber alignment sheet in a portion substantially corresponding to the beveled cut portion. The gist of the method is to add an auxiliary fiber alignment sheet of the same quality as the sheet, then wrap the wrapped sheet around a core metal, and then perform a heat curing treatment using a conventional method.

To explain the method of the present invention in detail, the wrapping sheet 1, which is the main component of the fishing rod, is a woven fabric or a bundle of glass fiber or carbon fiber impregnated with a thermosetting resin such as epoxy resin, polyester resin, or phenolic resin. It is made of a sheet and is cut so that 3 to 5 plies can be wound around the core metal 2, and its length is preferably longer than the specified fishing rod so that both ends can be cut off after the rod body is molded.

The reinforcing fiber alignment sheet 3 superimposed on the inner and outer parts of the winding sheet 1 is impregnated with a thermosetting resin like the winding sheet 1, and is made of carbon fibers having higher elasticity and strength than the winding sheet 1. Alternatively, it is formed of aligned boron fibers, and in particular, its base end has a width of one ply, and its outer side is beveled toward the tip.

Further, on the diagonal cut side of the reinforcing fiber alignment sheet 3, an auxiliary fiber alignment sheet 4, which is of the same quality as the wrapping sheet and substantially supplements the cut-off portion of the reinforcing fiber alignment sheet 3, is additionally superposed and placed.

In this way, the reinforcing fiber alignment sheet 3 is placed on the inner and outer parts.
After the winding sheet 1 on which the auxiliary fiber alignment sheet 4 is superposed and placed is wound around the core bar 2, it is subjected to binding treatment with tape, heat curing treatment, core bar removal treatment, tape peeling treatment, etc., as usual. Then, both ends are cut to produce a fishing rod of a predetermined length.

Specific examples of the fibers used in the winding sheet 1, the reinforcing fiber alignment sheet 3, and the auxiliary fiber alignment sheet 4 include: When boron fiber is used for the fiber alignment sheet 3 and glass fiber is used for the winding sheet 1 and the auxiliary fiber alignment sheet 4, it is preferable to use carbon fiber for the reinforcing fiber alignment sheet 3. In this case, Especially reinforcing fiber alignment sheet 3
and the auxiliary fiber alignment sheet 4 are of the same thickness as possible.

Example A winding sheet made of a carbon fiber alignment sheet impregnated with a thermosetting epoxy resin with a wall thickness of 0.08 mm was cut so that three plies at the front end and three plies at the rear end could be wound around a core bar. 2-ply rear end Reinforced boron fiber aligned sheet impregnated with thermosetting epoxy resin with a wall thickness of 0.13 mm excluding the 2nd ply at the tip 15 mm and the rear end 25 mm (starting with a minimum of 0.08 ply at the tip and gradually increasing the amount of wrapping) (1 ply at the end) is polymerized,
Thickness from the outside edge of the reinforced boron fiber alignment sheet above
Auxiliary carbon fiber alignment sheet impregnated with 0.13 mm of thermosetting epoxy resin (1 ply at the tip is the maximum, and the amount of wrapping gradually decreases to 0.08 ply at the rear end)
The reinforcing boron fiber alignment sheet and the auxiliary carbon fiber alignment sheet are polymerized and the number of windings is 1.08 from the leading edge to the trailing edge.
Then, wrap the winding sheet around the core metal, perform tape binding treatment, heat curing treatment, core metal removal treatment, and tape peeling treatment in the usual manner. After molding, 10 mm from the rear end The tip is cut at a 20mm position to produce a tip fishing rod.

The method of the present invention involves polymerizing a highly elastic, high-strength reinforcing fiber alignment sheet with diagonal cuts on the outer side on the inner and outer sides of a winding sheet, and supplementing the diagonal cut portion with an auxiliary fiber alignment sheet to form a core. By manufacturing fishing rods by wrapping the rods without uneven wall thickness, the elasticity and strength of these rods can be maintained without losing the condition of tip rods or small diameter rods, whose elasticity changes greatly. It is possible to manufacture a well-balanced fishing rod with high elasticity and high strength, and the winding operation on the core metal is easy, making the manufacturing work smooth.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the manufacturing process of the present invention, Figure 2 is an explanatory diagram showing the manufacturing process of the present invention.
The figure is a sectional view taken along line A--A in FIG. 1. 1... Winding sheet, 2... Core bar, 3... Reinforcing fiber alignment sheet, 4... Auxiliary fiber alignment sheet.

Claims (1)

[Claims] 1. A thermosetting resin-impregnated high-elasticity, high-strength reinforcing fiber string having a width of one ply at the base end and diagonally cut with the outer side facing toward the tip is attached to the inner and outer side of the wrapping sheet impregnated with a thermosetting resin. After superimposing the alignment sheets and adding an auxiliary fiber alignment sheet of the same quality as the winding sheet approximately corresponding to the diagonal cut portion to the diagonally cut edge of the reinforcing fiber alignment sheet, the winding sheet is A method for manufacturing a fishing rod, which comprises winding it around a metal core and subjecting it to heat curing treatment using a conventional method.