BASEBALL/SOFTBALL, METHOD OF PROCESSING THEREOF AND MATERIAL FORMULA OF BASEBALL/SOFTBALL COVER

Abstract

A baseball/softball comprises a core and a cover, wherein the core is wrapped with a layer of fiber material, and the layer of fiber material is wrapped and glued with the cover. A method of processing baseball/softball comprises wrapping the core with the layer of fiber material, placing the core and the layer of fiber material into a cover material, placing the core, the layer of fiber material outside the core and the layer of cover material outside the layer of fiber material into a mold; molding the layer of cover material into the cover through a vulcanization process, gluing a vulcanization melting layer formed on inner wall of the cover to the layer of fiber material, and finally taking the finished product out of the mold. From the perspectives of smell, touch and visual sense, the product has good simulation effect of baseball/softball and better service effect.

Claims

1. A baseball/softball, comprising a core and a cover, wherein the core is wrapped with a layer of fiber material, that is, a layer of fiber material soaked with rubber and added to the core being independently molded, the layer of fiber material is wrapped and glued with the cover, wherein the layer of fiber material consists of more than one layer of wool and one layer or more of TR yarn outside the layer of wool; the cover material is made based on a formula comprising a rubber, a pulverized cow leather material, and a rubber vulcanizing agent, with a mixing and breaking process, wherein the rubber vulcanizing agent comprises a sulfur, a softening oil, a precipitated calcium carbonate or a ground calcium carbonate; the core, the layer of wool and the layer of TR yarn for wrapping the core are directly placed into the cover material that has been mixed and applied but not yet molded, and into a mold together with the cover material for mold stripping along with the cover through high-temperature vulcanization; the gluing process is realized between a vulcanization melting layer formed on inner wall of the cover and the layer of fiber material.

2. A method of processing the baseball/softball according to claim 1, comprising, wrapping the layer of fiber material outside the core; placing both the core and the layer of fiber material into a cover material that has been applied but not molded; placing the core, the layer of fiber material outside the core and a layer of cover material outside the layer of fiber material into the mold; molding the layer of cover material is into the cover and gluing the vulcanization melting layer formed on inner wall of the cover to the layer of fiber material through a vulcanization process; and taking the finished product out of the mold.

3. A material formula of the cover of the baseball/softball according to claim 1, comprising at least a rubber and a pulverized cow leather.

4. The material formula of the cover of the baseball/softball according to claim 3, further comprising a rubber vulcanizing agent containing a precipitated calcium carbonate or a ground calcium carbonate, a softening oil and a sulphur.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0018] The core of the baseball/softball can be selected from that made by prior art or independent molded from rubber, PU, wool and other materials according to different formula and processes.

[0019] With such fiber materials as wool and TR (polyester viscose blended) yarn, the core can be wrapped in multiple layers, in which these fibers are soaked with rubber and then wrapped around the core.

[0020] In order to allow the materials of rubber cover to obtain better simulation effect of cow leather in smell, hand feel and functions, the pulverized cow leather is added into the formula to give the cover material the smell of leather genes. When used as a filling material, it can alleviate weight of the cover and increase its occlusive action, hardness and stress. The formula consists of a rubber, a pulverized cow leather, a precipitated calcium carbonate or ground calcium carbonate, a sulfur, an oil and other rubber agents (dosage ratio and materials of the formula are adjusted according to changes in the weather to achieve a good shape, less bubbles, resistance to yellowing, anti-aging and other standard requirements for hardness and bounce).

[0021] One process of the invention comprises mixing and breaking up the cover material, cutting and tabletting the cover material according to the weight of the cover, and placing it into a mold for vulcanization molding at high temperature. The circumference and weight of the cover is adjusted according to the circumference and weight of the core. For example, the standard weight of a finished product is 145 g±3 g (i.e. 142-148 g), and the circumference of it is 8.75-9.25 in. If the core weighs 120 g, the cover should weigh 25 g±3 g. The circumference of the cover is determined in the same way. The temperature and time shall be adjusted according to the formula too.

[0022] A layer of viscose glue is applied to the layer of fiber material outside the core, and then it is arranged into two or more vulcanized covers. Standing a while, they are fused as a whole.

[0023] The process therefore produces a baseball/softball with the core wrapped with a layer of fiber material and the layer of fiber material wrapped and glued with a cover.

[0024] The invention provides another process, i.e. the core and the fiber layer outside the core are directly placed into the cover material after mixing and breaking but before molding, and into a mold together with the cover material for mold stripping along with the cover under high-temperature vulcanization.

[0025] The process produces a baseball/softball with the core wrapped with the layer of fiber material and the layer of fiber material wrapped with a cover, and with the vulcanization melting layer formed on inner wall of the cover glued to the layer of fiber material.

[0026] Finally, the cover is provided with traditional lines of leather baseball/softball and painted with the same number of suturing pattern.

[0027] Taking a successfully developed structure of a wool core with a cover as an example, a small rubber core of 34 MM (made from more than ten materials including rubber, precipitated calcium carbonate or ground calcium carbonate powder, sulfur and other rubber vulcanization additives, through mixing and breaking, cutting and vulcanization) has specific circular weight. After molding, the core is layered by rough and fine wools (commonly, inside rough wool+outside fine wool, or three layers of fine wool, for wrapping the rubber core respectively to achieve pressure resistance, bounce coefficient, COR, impact-resistant property and anti-deformation that other finished products can have). After the core is wrapped with the wool yarn, it should be wrapped with one layer or more of TR (polyester viscose blended) yarn of different thickness (to form the outermost layer from the regulation layer for adjusting circumference and weight of the cover of the baseball/softball, and finally meet the standard requirements for the circumference and weight of the finished ball, including surface flatness). Most of the fiber material shall have high temperature resistance, high breaking strength, yarn twist, moisture content and other quality requirements. Meanwhile, the cover material is made based on a formula comprising a rubber, a pulverized cow leather material, precipitated calcium carbonate or ground calcium carbonate, a sulfur, a softening oil and other rubber vulcanizing agents, with a mixing and breaking process. Then, the core, the wool layer and the TR (polyester viscose blended) yarn layer outside the core are directly placed into the cover material after mixing and breaking but before molding, and into a mold together with the cover material for mold stripping along with the cover through high-temperature vulcanization. The whole ball is therefore obtained. Finally, the cover is provided with traditional lines of leather baseball/softball and painted with the same number of suturing pattern.

[0028] The invention overcomes the comprehensive shortcomings of traditional baseball/softball (in artificial processing and quality control), and replaces manual stitching process and cover material (of traditional leather) with machine processing and (rubber material), thus changing the situation of extremely low production and difficult recruitment and training, improving yield and obtaining stable quality. In addition to high productivity, the processing obtains more stable product functions, and even enhances product quality and times of resistance to batting. Compared with the baseball/softball wrapped with PU material showing low coefficient of resilience, easy deformation, strong smell of chemical ingredients, non-sticky hand feel and low simulation, the formula combining rubber with pulverized cow leather ensures good adhesion and seizure property between the core and the cover in service to avoid delamination, and presents high simulation in smell, hand feel, bounce and more culture genes of baseball/softball.

[0029] In a baseball/softball made according to the method, the layer of fiber material soaked with rubber is added to the independent molded core, thus, the cover and the core are more firmly fit during cover molding; and the porous structure in the fiber material is certainly inspiratory, thereby greatly avoiding bubbles appeared in cover molding, thus improving quality and service life of the ball. Moreover, the frequency resistant to batting of the core without a layer of fiber material soaked with rubber is lower than the core to which a layer of fiber material soaked with rubber is added.