TW201424807A - Fabrication method of composite baseball bat - Google Patents

Abstract

The invention discloses a fabrication method of a composite baseball bat, mainly relates to the field of fabrication of sports apparatuses, and particularly relates to the field of fabrication of the baseball bat. The fabrication process disclosed by the invention roughly includes the steps of firstly, fabricating a coarse embryos bracket of the bat from a fiber material, winding a polyurethane (PU) layer and an elastomer layer on a striking surface of the coarse embryos bracket; putting the coarse embryos bracket into a die on which a thermoplastic polyurethane (TPU) layer is covered at the inner surface; pouring PU along with the longitudinal direction of the coarse embryos bracket; baking the bat together with the die after pouring the PU, and taking out the baseball bat after heating and molding. Compared with the method of transversely pouring PU in the past, the internal part of the baseball bat is attached without a gap by application of the baseball bat prepared by the fabrication method; the situations of deformation, fracture and the like can not easily appear; the elasticity is increased by the design of an elastomer layer inside the baseball bat; the baseball bat is more wearable by the design of the TPU layer; and a crack does not easily appear.

Description

Composite bat manufacturing method

The invention relates to a method for manufacturing a sports equipment; in particular to an innovative production method of a baseball bat.

Press, the bat is the equipment used by the batters in the baseball game to hit the ball. It is a smooth round bar. Because the ball is fast moving by the bat, the player will have a larger ball when hitting the ball with the bat. Vibration, if the bat is not flexible, the vibration that is transmitted back to the player's palm will be relatively large, which will have a great impact on the player's performance; and the moving ball will have a greater impact on the bat, if When the bat is made, it is not strong enough. When the player hits the ball, it is prone to deformation, cracking, breaking, etc. Therefore, the elasticity and strength of the bat must be carefully considered when making the bat.

In the past, most of the bats were wood or aluminum bats. Among them, wooden bats are simpler and cheaper to produce, but the disadvantages are that the bats are heavier, poorly balanced, and prone to breakage; The weight of the bat is relatively light, but its elasticity is not good and the surface of the bat is prone to rupture, and the strength of the bat is not good enough. Therefore, in recent years, the composite bat has gradually developed, in the case of a composite bat, Its light weight and elastic performance are better than traditional wood or aluminum bats. However, due to the influence of materials and handicrafts, composite bats are subject to deformation, cracking and insufficient hitting.

Most of today's composite bats are made by infusion molding. Today, bat casting is generally done horizontally to the mold used to make the bat, but such a perfusion method makes the density of the bat suffer. The flow rate of the infusion material affects, and it is easy to make a gap in the bat, Not strong enough, it is easy to cause deformation, breakage, etc., causing problems such as poor quality of the bat and reducing the practicability of the product.

Therefore, in view of the problems existing in the above-mentioned conventional composite bat manufacturing method, how to develop an innovative production method that can be more ideal and practical, and the relevant industry should further consider the goal and direction of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a method for manufacturing a composite bat, and the technical problem to be solved is to think about an innovative breakthrough in how to develop a new composite bat manufacturing method with more ideal practicability; The technical feature of the present invention is mainly that the manufacturing method comprises: forming a bracket, and forming an inner bracket of the bat, the inner bracket is in a hollow structure type, and is integrally formed from a fiber material; The rear inner bracket is placed in a mold for making a bat, and a first auxiliary tool for preventing entry of foreign matter is covered at an opening above the inner bracket, and the inner surface of the mold is uniformly provided with a TPU layer, and The TPU layer is closely attached to the inner surface of the mold; the PU is vertically poured, and the PU is longitudinally infused into the gap between the TPU layer and the inner bracket in the erected mold along the direction of the erected inner bracket. When the PU is poured, the PU system passes through the first The second auxiliary tool is poured, and after the completion of the filling, the first auxiliary tool and the second auxiliary tool are taken out; the molding is performed by heating, and the mold and the model after the PU is filled in the mold are baked and heated, and the forming is matured. Then, the model is taken out from the mold; thereby, the unique innovative manufacturing method enables the present invention to greatly improve the elasticity, shock absorption, wear resistance and smooth surface of the ball striking surface of the composite bat according to the prior art. Degree, and makes the composite bat difficult Deformation, rupture or breakage, in order to achieve a substantial increase in the quality of the composite bat finished product, structural strength, service life and product practicality and many other practical benefits.

01‧‧‧ bracket

02‧‧‧First PU layer

03‧‧‧ Elastomeric layer

04‧‧‧Second PU layer

05‧‧‧TPU layer

06‧‧‧Mold

07‧‧‧First aids

08‧‧‧second aids

09‧‧‧ Third aids

Fig. 1 is a schematic view showing the state of the present invention when a PU in a liquid state is poured into a mold.

Fig. 2 is a cross-sectional view showing the structure of the present invention after the liquid PU is filled into the mold and the third auxiliary device is attached.

Figure 3 is a schematic view showing a state in which the inner rod of the surface-wound TPU layer is placed in a mold; Figure 4 is a cross-sectional view of the inner stent of the present invention; and Figure 5 is a first PU layer of the inner bracket And a cross-sectional view of the structure after the elastomer layer; Fig. 6 is a cross-sectional view showing the structure of the bat of the present invention.

1 to 4 and 6 are preferred embodiments of the method for fabricating the composite bat of the present invention, but the embodiments are for illustrative purposes only and are not limited by the patent application; The method comprises the following steps: (1) forming the bracket, forming the inner bracket 01 of the bat; (2) placing the mold 06, and placing the formed inner bracket 01 into the mold 06 for making the bat, the mold 06 The inner surface is uniformly provided with a TPU (thermoplastic polyurethane) layer 05, and the TPU layer 05 is closely attached to the inner surface of the mold 06; (3) Vertically infiltrating PU (polyurethane), longitudinally injecting PU in the gap between the TPU layer 05 and the inner bracket 01 in the mold 06 standing upright in the direction of the standing inner bracket 01 (such as the first icon showing the arrow L1); (4) Heat molding, baking and heating the mold after filling the PU in the mold and the mold, and taking out the model from the mold 06 after the aging molding; the details of the above production method are as follows:

First, the inner bracket 01 of the bat is integrally formed by using a fiber material, and the inner bracket 01 is a hollow structure. As shown in FIG. 4, the surface of the inner bracket 01 thus produced may have a recessed space, but the subsequent The PU process will cause the recess to be filled, and the bracket made of fiber material is stronger and is not easily broken due to excessive force when hitting the ball.

Then, the first PU layer 02 is wound on the inner scaffold 01 corresponding to the striking surface of the bat, and the inner side of the first PU layer 02 is adhered to the striking surface of the inner bracket 01 through the glue or the predetermined adhesive. The outer surface of the first PU layer 02 is bonded to the elastic layer 03, and the inner side of the elastic layer 03 is adhered to the surface of the first PU layer 02 through glue or a predetermined adhesive, as shown in FIG. The elastomer layer 03 may be a high elastic sponge or an EVA (ethylene/vinyl acetate copolymer) material, and the portion is not limited.

Next, the TPU layer 05 is uniformly covered in the surface layer of the mold 06 placed upright, and then the inner bracket 01 to which the first PU layer 02 and the elastic layer 03 are bonded is placed upright in the mold, and the opening above the inner bracket 01 is The first auxiliary device 07 is capped, and the first auxiliary device 07 functions to prevent the PU from entering the inner bracket 01 when the PU is filled with liquid, and is erected along the mold 06 through a second auxiliary device 08. The gap between the inner bracket 01 and the TPU layer 05 is poured into the PU. As shown in FIG. 1, the second auxiliary device 08 can be a funnel, and the mouth of the funnel is nested in the gap between the TPU layer 05 and the inner bracket 01. Inside, after the PU is filled, a third auxiliary device 09 is used to plug the opening of the entire mold 06 to prevent the PU from leaking out.

Finally, the mold 06 is placed horizontally along with the inner mold for baking heating, and after the aging, the mold is taken out from the mold 06, thereby completing the production of the bat.

As shown in FIG. 6 , the composite bat is made by the above steps, and the composite bat includes an inner bracket 01 and a first PU layer 02 which is wound on the impact surface of the inner bracket 01. And an elastomer layer 03, a second PU layer 04 and an outermost layer of TPU 05; the innermost layer of the composite bat is an inner bracket 01, and the outer diameter of each portion of the inner bracket 01 is smaller than the outer diameter of each portion of the composite bat The inner bracket 01 is directly formed by using a fiber material, and the striking surface of the inner bracket 01 is wrapped around the first PU layer 02, and the outer surface height position of the first PU layer 02 is equal to the composite ball. The height position of the face is pressed, and the inner side of the first PU layer 02 is in close contact with the striking face of the inner bracket 01, and the outer surface of the first PU layer 02 is covered with the elastomer layer 03 (the elastomer layer 03 is as described above) It is a high elastic sponge or EVA), and the outermost layer of the composite bat is evenly provided with a TPU layer 05, and the TPU layer 05 is disposed around the entire surface of the composite bat, wherein the inner support of the first PU layer 02 and the elastomer layer 03 is adhered A second PU layer 04 is formed between 01 and the TPU layer 05 through the vertical direction and heated, and the second PU layer 04 surrounds the entire An outer side surface of the bracket 01 is provided.

According to the above manufacturing method, the first PU layer 02 enclosing the inner frame 01 in the composite bat made by the present invention is formed by longitudinally injecting the PU in the liquid state along the inner support 01, and then baking the first PU. Between the layer 02 and the TPU layer 05, or between the first PU layer 02 and the inner bracket 01, there is no gap, so compared with the conventional method of injecting the mold to the horizontally placed mold. Due to the relationship between the flow velocity and the gravity of the material itself, the surface layers of the composite bat made by applying the manufacturing method of the present invention are more robust and less prone to deformation or breakage; in addition, the inner stent 01 of the present invention The fiber material is integrally formed, so that the overall structure is firmer, less likely to break, and the production is simpler and easier. Furthermore, the impact surface of the inner frame 01 is covered with the first PU layer. 02, so that the shock absorbing performance of the composite bat is improved, so that the vibration of the player's back to the palm when the ball is hit becomes smaller, and the elastic layer 03 of the inner bracket 01 hits the ball of the composite bat. Increased surface elasticity, making the rebounding force better when hitting the ball; on the one hand, Moreover, since the PU material is fragile, the present invention adds a TPU layer 05 on the surface of the second PU layer 04, and the composite material has the characteristics of impact resistance, shock absorption, elongation, and withstand capability. When the bat hits the ball, the surface is not prone to cracking, and the shock absorbing effect is more obvious. Therefore, the player can obtain better performance and the wear resistance of the TPU material is good, so that the composite bat is more wear-resistant and looks outward. More beautiful and smooth.

As shown in FIG. 1 to FIG. 6 , it is another practical implementation method of the present invention, and the manufacturing method includes the following steps:

(1) First, the inner bracket 01 of the composite bat is formed, and the inner bracket 01 of the bat is directly integrated with the fiber material, the inner bracket 01 has a hollow structure (as shown in Fig. 4); (2) the inner bracket The first PU layer 02 is wound on the ball striking surface of 01, and an elastomer layer 03 is wound around the outer side of the first PU layer 02. The elastomer layer 03 may be a high elastic sponge or EVA, wherein the inner bracket 01 and the first A PU layer 02, a first PU layer 02 and an elastomer layer 03 are adhered through a glue or a predetermined adhesive; a cover at an opening above the inner bracket 01 prevents a first entry of a liquid PU. The accessory 07, wherein the setting of the first PU layer 02 makes the shock absorbing ability of the composite bat better, the vibration transmitted back to the palm of the player when the player hits the ball becomes smaller, and the design of the elastic layer 03 makes the elastic of the composite bat Well, the rebound is better when hitting the ball.

(3) A TPU layer frame 05 corresponding to the top of the bracket and having no opening is provided outside the inner bracket 01, and the TPU layer frame 05 and the inner bracket 01 are relatively positioned and placed together in a mold 06, the TPU layer frame 05 and the inner bracket 01 There is a gap for injecting the PU, and the TPU layer frame 05 is placed in a mold 06 together with the inner bracket 01, so that the preset pattern on the surface of the TPU layer frame 05 can completely correspond to the inner bracket 01. Various parts.

(4) The PU is erected vertically, and the second auxiliary device 08 (which may be a funnel or the like, which is not limited) is erected along the direction of the erected inner bracket 01. The PU is longitudinally infused into the gap between the TPU layer frame 05 and the inner bracket 01 in the mold 06; the longitudinal infusion method can make the TPU layer frame 05 and the second PU compared to the conventional method of injecting the mold to the horizontally placed mold. The layer 04 and the inner bracket 01 are closely adhered without gaps, and the recessed space on the surface of the inner bracket 01 is also filled by the PU during the filling, so that the finished composite bat is not easily deformed or broken.

(5) After the completion of the filling, the first auxiliary device 07 and the second auxiliary device 08 are taken out, and the third auxiliary device 09 capable of preventing the PU from leaking out is placed at the opening above the mold 06; (6) The mold 06 of the three-assist 09 and its inner mold are baked and heated, and the mold is taken out from the mold 06 after the molding.

Advantages of the invention:

1. The hitting surface of the inner bracket is wrapped around the first PU layer, so that the shock absorbing performance of the composite baseball is improved, and the vibration transmitted back to the palm when the player hits the ball becomes smaller; and the first The PU layer is formed by longitudinally injecting the PU in a liquid state along the inner bracket and then brazing, so that the first PU layer and the TPU layer or the first PU layer and the inner bracket are tightly fitted together. Without gaps, the surface layers of the composite bat can be made stronger, making the composite bat less prone to deformation or breakage.

2. By laminating the elastic layer on the outer surface of the first PU layer, the elastic layer can be used to enhance the elasticity of the composite bat, so that the rebound force is better when hitting the ball.

3. With the TPU layer setting, the TPU material has the characteristics of impact resistance, shock absorption, elongation, wear resistance and better bearing capacity, so that when the composite bat hits the ball, the surface is less prone to cracking. Moreover, the shock absorbing effect is more obvious, and the composite bat is more wear-resistant, and the surface is more beautiful and smooth.

The present invention has been specifically described by the above embodiments, and although the description is by specific terms, the present invention cannot be limited thereto. Scope of the invention; those skilled in the art can change and modify the spirit and principles of the invention to achieve the equivalent purpose, and such changes and modifications should be included in the following. In the scope defined by the scope of application for patents.

01‧‧‧ bracket

02‧‧‧First PU layer

03‧‧‧ Elastomeric layer

05‧‧‧TPU layer

06‧‧‧Mold

07‧‧‧First aids

09‧‧‧ Third aids

Claims (10)

A manufacturing method of a composite bat, the manufacturing method comprising the following steps: (1) forming a bracket to form an inner bracket of the bat; (2) placing the mold into the mold, and placing the formed inner bracket into a mold for making the bat Inside, the inner surface of the mold is uniformly provided with a TPU (thermoplastic polyurethane) layer, and the TPU layer is closely attached to the inner surface of the mold; (3) the vertical perfusion PU (polyurethane), along the erected inner side The bracket is oriented longitudinally to inject the PU into the gap between the TPU layer and the inner bracket in the erected mold; (4) heat forming, baking and heating the mold after filling the mold in the mold and the mold, and molding the model from the mold after curing take out. The method for manufacturing a composite bat according to claim 1, wherein in the step (1), the first PU layer is attached to the striking surface of the inner bracket, and the outer surface of the first PU layer is attached. The coils are provided with an elastomer layer. The method of manufacturing the composite bat according to claim 2, wherein the bonding surface of the inner bracket and the first PU layer, the first PU layer and the elastomer layer are adhered through glue or a predetermined adhesive, and The elastomer layer is a sponge or EVA (ethylene/vinyl acetate copolymer). The manufacturing method of the composite bat according to claim 1, wherein the inner bracket in the step (1) is a hollow structure and is integrally formed from the fiber material, and the opening position above the inner bracket in the step (2) is added. The cover can prevent the first aid from entering the PU. The method of manufacturing a composite bat according to claim 1, wherein in the step (3), the PU system is perfused by a second auxiliary device when the PU is poured. The method for manufacturing a composite bat according to claim 5, wherein the second auxiliary device in the step (3) is a funnel, and the mouth of the funnel is nested in the TPU. The gap between the layer and the inner bracket. The method for manufacturing a composite bat according to claim 1, wherein the first auxiliary device and the second auxiliary device are taken out after the step (3) is completed and before the step (4) is performed, and A third aid that prevents the PU from leaking out is attached to the top of the model. A manufacturing method of a composite bat, the manufacturing method comprising the following steps: (1) forming a bracket to form an inner bracket having a hollow structure; and (2) affixing an opening at the upper bracket to prevent the PU from entering the first aid (3) A TPU layer frame corresponding to the top of the inner bracket and having no opening is arranged outside the inner bracket, and the TPU layer frame is placed in a mold together with the inner bracket, and the TPU layer frame and the inner bracket are used for (4) Vertically infiltrating PU, longitudinally injecting PU through the gap between the TPU layer frame and the inner bracket in the mold standing along the erected inner bracket in the direction of the erected inner bracket; (5) after filling The first auxiliary tool and the second auxiliary tool are taken out, and a third auxiliary tool capable of preventing the PU from leaking out is capped at the opening above the mold; (6) the mold with the third auxiliary device and the inner model thereof are subjected to The baking is heated, and the mold is taken out from the mold after aging. The method for manufacturing a composite bat according to claim 8, wherein in the step (1), the punching surface provided on the inner bracket is provided with a first PU layer, and then outside the first PU layer. The surface-bonded roll is provided with an elastomer layer. The method of manufacturing a composite bat according to claim 8 or 9, wherein the inner support is integrally formed of a fibrous material, and the elastic layer is a sponge or EVA.