Composite damping baseball bat and production process thereof

Abstract

The invention discloses a composite damping baseball bat and a production process thereof. The composite damping baseball bat is formed in such a manner that a hollow cellulosic core bat, an aluminum alloy hitting sleeve pipe and an epoxy resin layer are compounded. The cellulosic core bat has a damping effect. The aluminum alloy hitting sleeve pipe is installed at a hitting damping portion of the cellulosic core bat in order to improve strength of the baseball bat. The outer wall surface of a main body of the baseball bat is provided with epoxy resin by potting. The epoxy resin layer formed by curing has fine mechanical property. The core bat is firmly adhered with the aluminum alloy hitting sleeve pipe by epoxy resin. After curing, external appearance of the baseball bat is kept intact. The composite damping baseball bat and the production process thereof have following beneficial effects: the composite damping baseball bat is relatively low in weight, great in strength of an overall structure, fine in damping function, fairly comfortable in ball-hitting feeling and fine in ball-hitting performance and is firm and endurable and is not easily broken or dented; a simple production process of production technology for a main body of the composite damping baseball bat is obtained; fine production efficiency, quality and yield are achieved; rate of defective products is decreased; and production cost is reduced.

Description

technical field [0001] The invention relates to the field of sports equipment, in particular to a composite shock-absorbing baseball bat and a manufacturing process thereof. Background technique [0002] With the vigorous development of sports, baseball, as a kind of sports, attracts many fans with its high skill and strong stimulation. In baseball, a baseball bat is a tool used by the user to swing a high-speed ball. Therefore, a good baseball bat must have the advantages of light weight, strong rigidity, good elasticity, and good shock absorption. It must also be able to withstand the instantaneous huge impact force of the high-speed sphere. [0003] At present, the used baseball bats of baseball can be roughly divided into wooden baseball bats, metallic baseball bats and baseball bats containing fiber. Among them, the price of the wooden baseball bat is the cheapest, so it is very popular. However, it has some disadvantages: first, the wooden baseball bat is solid, the ...

AI Technical Summary

Problems solved by technology

Among them, the price of the wooden baseball bat is the cheapest, so it is very popular. However, it has some disadvantages: first, the wooden baseball bat is solid, the overall weight is relatively heavy, and its center of gravity is biased towards the head of the striking part, so its balance is not good Therefore, it is more difficult to use and the swing speed is slower, so that the hit baseball is not strong and the flight distance is short; secondly, the structure of the wooden baseball bat is relatively fragile, easy to crack or even break, but it feels very comfortable to hit the ball. No violent vibration and tingling

For example, in the prior art, fiber-reinforced plastic-type baseball bats made by combining fiber materials with plastics are specifically impregnated with molten thermoplastics in advance of the fiber bundles, and then wound in a predetermined direction on a ball bat. The outer shell is formed on a stick-shaped mandrel, and finally a baseball bat can be obtained by taking out the mandrel and modifying it appropriately. This kind of manufacturing method is called filament winding method, and the man-hour required for its manufacture is longer. , the production efficiency is low; and, during the winding process, the mandrel must be kept at an appropriate temperature so that the above impregnated thermoplastic will not solidify, but it is difficult to keep the temperature at each position of the whole mandrel consistent, therefore, some impregnation has The fiber bundles of thermoplastics are solidified before winding and cannot be bonded to adjacent layers of fiber bundles. In this case, the strength of the baseball bat will be reduced. In addition, the tension between the layers when the fiber bundles are wound Stacked together, therefore, the fit between the layers is not tight enough, and the structural strength of this type of baseball bat is not high enough

[0004] Another example is another existing technology that uses thermoplastics as the base material and fiber material as the reinforcing material. The manufacturing method is to first take a high-temperature-resistant and elastic inner tube, and place it on the surface of the inner tube. Wrap a layer of thermoplastic base material, and then wind a layer of fiber reinforcement, and repeat this to form a tube with a laminated outer shell, which is placed in a mold and cured. Therefore, its strength must be It is better than the fiber-reinforced plastic baseball bat made by the above-mentioned winding method; however, in actual use, it will be found that its structural strength is still not high enough, and it cannot maximize shock absorption to meet the needs of users, and at the same time, the This production method is more complicated and prone to defective products in the production process

[0005] Also for example, the composite material baseball bat produced by the relatively mature blow molding process now has better performance and strength than the baseball bats produced by the first two methods, but the baseball bat still makes the batter hit the ball. The head feels strong vibration accompanied by tingling and other discomforts, and the bat is often cracked, which is not as strong as an aluminum alloy baseball bat

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