JPS5867272A - Production of core material for bat made of frp - 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] This is a method for producing a foamed synthetic resin core material for use in a lower FRP batt.

Conventionally made of pFRP/? The structure of TS11 can be classified into medium-sized structure and medium-sized structure. However, with the hollow structure, there are problems such as uneven thickness distribution of the FRP outer shell layer after molding.
P bag 1, no, 1. This method had drawbacks such as variations in the results.

In addition, for solid structures, wooden core materials, foamed synthetic resin core materials, and fiber-reinforced foamed synthetic resin core materials in which fibers are interposed in all aspects of the core material are known as "A cover". ing. However, even when these single-layer materials were used, the following illumination points were present.

In other words, in the case of wooden core H, since the wood itself is a natural product, it is difficult to obtain a stable homogeneous material that satisfies specific gravity, moisture content, strength, etc.
When RP bats were manufactured, there was a drawback in that the quality was likely to vary.

In addition, as shown in FIGS. 2 and 3, in the case of the core material 2 made of foamed synthetic resin, the compressive strength of the ball hitting part is large and the amount of strain due to compressive stress is small, but conversely, the grip part Since the bending rigidity of FRP bats is very low, when FRP bats are manufactured using such foamed synthetic resin core materials, the following drawbacks may occur.

In other words, in order to obtain a PPP-made piece with excellent strength, rigidity, and ball-hitting performance, glass fibers, carbon fibers, and other reinforcing fibers are wound in rows along the entire length of the bat core under tension. It is necessary to form a coated FRP layer, but with a core material made of foamed synthetic resin, the grip part bends significantly when tension is applied, making it impossible to apply sufficient tension, which makes textile processing difficult. In addition to making the winding process difficult,
The arrangement angle of the fibers was disordered, resulting in poor strength and performance of the FRP after molding3. Therefore, as shown in Figures S and S, the total length of the FRP material was A fiber-reinforced foamed synthetic resin core with a fiber-reinforced fiber 3 interposed over the entire length of time has been completed. In this case, the bending rigidity and strength of the clip part are sufficient, but
On the other hand, in the ball hitting area, the compressive strength tends to decrease due to the presence of fibers ('E>'), which means that the compressive strength is proportional to the density of the foamed synthetic resin. As a result, the density of the foamed synthetic resin decreases by that amount, resulting in a disadvantage that the compressive strength decreases.

In addition, when manufacturing Jl''R19 batho 1- by using fiber yarn 1 (reinforced colored synthetic resin stone), F h
, 71-Rix resin that forms P flows from both ends of the core material into the gap created between the fibers by capillary action.
Since the interior of Z i'A is impregnated, the weight of the finished product becomes heavy and the quality varies, and the matrix resin is wasted accordingly.

In view of these conventional drawbacks, the present invention has developed an F
It was made for the purpose of supplying core material for RP bats.

To explain the present invention based on the drawings, as shown in FIGS. 4 to 7, the winding auxiliary member 3J-, which can be made of any structure such as non-woven fabric, mat, Nukurimu cloth, etc., is coated with glass fiber, carbon fiber, etc. An arbitrary number of reinforcing fiber members are arranged along the longitudinal direction of the /Z, and then the reinforcing fiber members are rolled up together with the auxiliary member S for winding.
A reinforcing member Z using the bat core is formed, and the reinforcing member Z for the bat coloring material is attached to a portion 7 corresponding to the grip part of the lower mold for molding the bat core material.
A bat made of FRP, characterized in that a core material for a bat is obtained by inserting and arranging two molds into the mold, placing and pressing a mold, and injecting a foamed synthetic resin into the mold and curing the foam. This is a method of manufacturing stone for use.

As described above, in the present invention, on the auxiliary wrapping member S such as non-woven fabric, mat, Nukurimu cloth, etc., the fiber reinforcing portion H4 made of Gafnu fiber, carbon fiber, etc. After arranging the roving cloths etc. drawn in the same direction, by rolling them together, the reinforcing part E'7 using the bat core can be formed. 43
When the mold is held upright in the longitudinal direction, it is reliably supported in the mold without losing its shape. In addition, the foamed synthetic resin is uniformly impregnated into the fibers without disturbing the fibers, and extremely good foaming and curing can be achieved.

In addition, if a foamed synthetic resin with a slow cream time or live time is used, it will be better impregnated into the core reinforcing member, making it possible to form a more uniform foam-molded core. be.

As shown in Figure 1O and Figure 1/, the core material molded by the manufacturing method of the present invention has a high compressive strength because the ball hitting part is made of foamed synthetic resin, and has a high compressive strength due to compressive stress. At the same time, the amount of strain shows a small value, and at the same time, the bending rigidity of the retaining clip part, which has a core reinforcing part in the grip part, shows a high value.

Therefore, when manufacturing an FRP bat using the core material according to the present invention, tension is applied to glass fiber, carbon fiber, or other reinforcing fibers in the entire length direction of the core material, which is different from the conventional method. Since the FRP layer can be formed by coating, the arrangement angle of the fibers to be wrapped and coated can be made uniform, and the characteristic values of the FRP layer itself can be significantly improved.

Furthermore, even when manufacturing bats of the same weight, the amount of reinforcing fibers that are conventionally interposed in the ball hitting area can be reduced, and the amount commensurate with the reduced weight can be used to reinforce the FRP layer. Therefore, there will be an effect in terms of strength.

In addition, in the flood material according to the present invention, 1. Both ends of the material and the entire circumference of the core material are completely covered with foamed synthetic resin, so that the matrix resin forming the FIN and P layers is Since there is no impregnation inside the resin, it is possible to prevent variations in the weight of the finished product, and it also has the effect of preventing wasteful consumption of matrix resin.

The core 4' according to the present invention,) J and the conventionally known core 4',
A comparison of mechanical properties with Puri is shown in Table-/.

In the table, (A) is a company IA that is one type of the present invention, (l-+) is a company known from the past, and a core with reinforcing fibers interposed throughout the entire length of the material:
A. ((2) is a conventionally known foamed synthetic resin 1'+a unique core 4; t.

[Brief explanation of drawings]

FIG. 1 is a front view showing a core material for a bat. Figures 2, 3, G, and S are A and B of Figure 1.
FIG. 2 is a cross-sectional perspective view showing a conventional core material in position. FIG. 6, FIG. 7, and FIG. g are perspective views showing a part of the manufacturing process of the FRP bat core according to the present invention. FIG. 7 is a sectional view taken along the line CC in FIG. 1 of the FE, P core material made according to the present invention. 70 and 1/FIG. 70 are cross-sectional perspective views of the FRP/gut core made according to the present invention at positions A and B in FIG. 1. /-m-core material, 2-m-foamed synthetic resin core material, 3-m-reinforcing fiber, goooooo fiber reinforced core material, 3-111 auxiliary member for wrapping, Otsu-m-fiber reinforcing member, kuoooo, Core material reinforcing core material, g--lower mold, 42nd tar-grip, 10-m-foamed synthetic resin. Representative Director Kenjibe Mizuno

Claims (4)

[Claims] (1) An auxiliary winding member of any composition such as non-woven fabric, mat, scrim cloth, etc. Second, an arbitrary number of reinforcing fiber members such as galame fiber or carbon fiber are arranged along the longitudinal direction of the bat, and then The reinforcing fiber member is rolled up together with the auxiliary rolling member to form a reinforcing member for bat core material, and the reinforcing member for bat core material is inserted into parts corresponding to the grip part of the lower mold for molding the core material. The FRP is inserted into the mold, placed on a stopper mold and pressed, and foamed synthetic resin is injected into the mold and foamed and hardened to produce grass and bat core material.
A method for producing core material for manufactured bats. (2) The method for manufacturing an FRP punt core material according to claim 1, wherein the reinforcing fiber member is made of roving yarn. (3) Special feature γl' characterized in that the reinforcing fiber member is made of roving cloth; A method for producing an FRP bat core according to item 1. (4) The qtq manufacturing method 3 of j64A for an FRP bat according to claim 1, characterized in that the reinforcing fiber portion 4 is made of 1/Reco vermilion cloth cloth.