CN2618645Y - string with rough surface - Google Patents

Abstract

A string with a rough surface comprises a core, a first coating layer, a reinforcing outer yarn and a second coating layer. The core has a plurality of first wire bodies twisted and glued together along an axial direction to form a linear shape. The first coating layer is coated on the periphery of the core. The reinforcing outer yarn has a plurality of second wire bodies twisted and wound around the periphery of the first coating layer in the opposite direction of the first wire bodies. The second coating layer is coated on the periphery of the reinforcing outer yarn and has a rough surface, so as to increase the friction when hitting the ball and assist the player in controlling the ball when swinging the racket.

Description

string with rough surface

technical field

The utility model relates to a string, in particular to a string used for a racket of a ball game appliance.

Background technique

As shown in Figure 1, there is an existing string 9 for weaving into the batting net surface of a racket, which includes a core 91, a moisture hardening type polyurethane (Polyurethane) layer 92, and a reinforced outer yarn 93 and a cladding layer 94 .

The core 91 has a plurality of nylon multifilaments 911 twisted along an axial direction and soaked in high-pressure nylon polyurethane resin (Polyurethane Resin) 912 . The nylon multifilaments 911 are bundled by the high-pressure nylon polyurethane resin 912 to form a thread.

The moisture-curable polyurethane layer 92 covers the periphery of the core 91 . The reinforced outer yarn 93 has a plurality of nylon yarns 931 and is twisted and wound around the periphery of the moisture-curable polyurethane layer 92 in opposite directions to the nylon multifilaments 911 .

The cladding layer 94 is coated on the periphery of the reinforced outer yarn 93 and is formed by mixing Silicone and Nylon Resin. The core 91 and the reinforced outer yarn 93 are protected by the covering layer 94, so as to prevent the core 91 and the reinforced outer yarn 93 from being damaged due to frequent contact and friction between the sphere (not shown) and the string 9.

This kind of design of this existing string 9, though have the characteristics of protecting the core 91 and strengthening the outer yarn 93, it still has the following disadvantages:

(1), as shown in Figure 2, when the thickness of this covering layer 94 is thicker, although can protect this core 91 and strengthening outer yarn 93 from being cut because of being excessively rubbed by spheroid, but this covering layer The smooth surface of 94 cannot increase the friction when hitting the ball, and assist the player to control the ball in the direction of the ball when swinging the racket.

(2), as shown in Figure 3, when the thickness of this cladding layer 94 is thinner, this cladding layer 94 can flow and wrap along the outermost arrangement lines of the plurality of nylon yarn filaments 931 of this reinforced outer yarn 93, and infiltrate The gaps between the nylon yarns 931 make the coating layer 94 on the outer surface of each adjacent nylon yarn 931 form a smooth fine-grained surface, allowing players to slightly improve the ball control performance of the ball. However, the smooth fine grained surface still cannot greatly improve the frictional force when hitting the ball, and the too thin coating layer 94 also affects the overall life of the conventional string 9 .

Although the above-mentioned existing string 9 has the effect of long service life, it still cannot achieve the functions of long service life and easy ball control at the same time.

Contents of the invention

The purpose of the utility model is to provide a string used for a racket of a ball game, and the string has a rough surface.

The string with a rough surface of the utility model includes: a core, a first covering layer, a strengthening outer yarn and a second covering layer. The core has a plurality of first wire bodies that are mutually twisted along an axial direction and glued together to form a wire shape. The first covering layer covers the periphery of the core. The reinforced outer yarn has a plurality of second thread bodies, and is twisted in the opposite direction of the first thread bodies and wound around the periphery of the first covering layer. The second covering layer is coated on the periphery of the reinforced outer yarn and has a rough surface, which is used to increase the friction force when hitting the ball and assist the player to control the ball when swinging the racket.

Description of drawings

In the attached picture

Fig. 1 is a three-dimensional schematic diagram of a conventional string.

Fig. 2 is a combined cross-sectional view of the existing string.

Fig. 3 is a composite cross-sectional view similar to that of Fig. 2, illustrating the situation when the existing string has a less coated coating.

FIG. 4 is a schematic perspective view illustrating a preferred embodiment of the string with a rough surface of the present invention.

Fig. 5 is an assembled cross-sectional view of the preferred embodiment.

Fig. 6 is a flow chart illustrating the molding process of the preferred embodiment.

Detailed ways

The string with rough surface of the present utility model is described in detail below through the preferred embodiment and accompanying drawings,

As shown in Fig. 4 and Fig. 5, the preferred embodiment of the string 10 with a rough surface of the utility model comprises: a core 11, a first covering layer 12, a strengthening outer yarn 13 and a second wrapping cladding14.

The core 11 has a plurality of first wires 111 that are mutually twisted along an axial direction and glued together by high-pressure nylon polyurethane resin 112 to form a wire.

The first cladding layer 12 is wrapped around the periphery of the core 11, and is made of thermoplastic resin (Thermoplastic Resin), which is moisture-curing polyurethane in this preferred embodiment. Made of ester material.

The reinforcing outer yarn 13 has a plurality of second wires 131 made of nylon yarns, and is twisted and twisted in the opposite direction of the first wires 111 around the outer periphery of the first covering layer 12 .

The second covering layer 14 is coated on the outer periphery of the strengthening outer yarn 13 and has a rough surface 141, which is used to increase the friction when hitting the ball (not shown) and assist the player when swinging the racket (not shown). Control the ball and resist the high heat generated when hitting the ball. In this preferred embodiment, the cross section of the string 10 is a circle, and may also be a polygon or an irregular shape.

The second cladding layer 14 is formed by mixing silica gel and nylon resin, and by injecting high-pressure air into the mixture of silica gel and nylon resin, forcing the mixture of silica gel and nylon resin to contain uniformly distributed air bubbles, so that A rough surface 141 is formed on the outer surface of the second coating layer 14 .

As shown in Figure 4 and Figure 6, the combination of the components of the string 10 of the present invention is formed by the following process:

1. The first thread bodies 111 wound on the plurality of nylon bobbins 2 pass through a tension controller 3 first, so that the tension of each first thread body 111 is equal.

2. The first wire bodies 111 will be guided by a guide mold 41 and penetrate into an impregnation tank 4. The inside of the impregnation tank 4 is filled with high-pressure nylon polyurethane resin 112, so that the first wire bodies 111 are all adhered with high-pressure nylon polyurethane resin 112, and the first wire body 111 adhered with high-pressure nylon polyurethane resin 112 will go through a control loop before going out of the impregnation tank 4. The constraints of the mold 42 make the high-pressure nylon polyurethane resin 112 maintain a predetermined impregnation amount and form the core 11 .

3. The core 11 continues to penetrate into a PU groove 5, and one side of the PU groove 5 is filled with moisture-hardening polyurethane, and the surrounding surface of the core 11 can be coated with moisture-curing polyurethane. Urethane and form the first cladding layer 12, before passing through the PU groove 5, pass through a control port 51 that is gradually converging to control the coating thickness of the first cladding layer 12 .

Four, the peripheral axis of a turntable 6 is provided with a plurality of yarn reels 61, and the second thread body 131 wound on the yarn reels 61 is twisted and wound on the first thread body 111 in the opposite direction to the first thread body 111. The outer periphery of a cladding layer 12 forms the strengthening outer yarn 13 .

5. The skeined core 11 that is provided with the strengthening outer yarn 13 continues to penetrate into a cladding groove 7 . The coating tank 7 contains a mixture of silica gel and nylon resin injected with high-pressure air, and the mixture contains uniformly dispersed air bubbles through the injection of high-pressure gas. The reinforced outer yarn 13 peripheral surface soaked in the coating groove 7 can be coated with a mixture of silica gel and nylon resin in which air bubbles are uniformly dispersed (this mixture is also the aforementioned second coating layer 14 ), and make the second coating layer 14 form the rough surface 141 due to the uniformly dispersed air bubbles, and finally make and shape the string 10 .

6. After the string 10 continues to penetrate into the inside of a retracting mechanism 8, a control wheel 81 can be used to control the pitch at which the string 10 is wound on a retracting wheel 82, and the retracting mechanism 8 and the turntable 6. The direction of rotation is opposite, which can make the string 10 have better bonding force between the layers.

Therefore, compared with the existing string 9, the string 10 with a rough surface of the present invention has the following characteristics in overall effect:

(1), the string 10 can obtain a rough surface 141 without reducing the thickness of the second cladding layer 14, which can not only increase the friction between the string 10 and the ball and improve the ball control when hitting the ball, Moreover, the thicker second covering layer 14 can make the string 10 have a longer service life.

(2) Since the second cladding layer 14 contains evenly dispersed air bubbles, it is formed by injecting high-pressure air into the silica gel and nylon resin, and the thermal conductivity of the air is low, so it has good heat insulation. Effect, so it can resist the high heat generated when hitting the ball.

To sum up the above, the utility model has the string 10 with a rough surface, which has the characteristics of improved ball control, long service life and high heat resistance when hitting the ball, so it can really achieve the purpose of the utility model.

Claims (4)

1. string of a musical instrument with rough surface, this string of a musical instrument is to be used on the racket of ball game apparatus, it is characterized in that this string of a musical instrument comprises:

The one stamen heart has the plural first line body, and these first line bodies axially twist to twist with the fingers and glue together to restraint to close along one and are wire;

One first clad is coated on the periphery of this stamen heart;

One strengthens outer yarn, has the plural second line body and twists with the fingers the periphery that is set around this first clad with the rightabout strand of these first line bodies; And

One second clad is coated on the peripheral of the outer yarn of this reinforcement and has a rough surface.

2. the string of a musical instrument with rough surface as claimed in claim 1 is characterized in that: the cross section of this string of a musical instrument is a circle.

3. the string of a musical instrument with rough surface as claimed in claim 1 is characterized in that: the cross section of this string of a musical instrument is a polygon.

4. the string of a musical instrument with rough surface as claimed in claim 1 is characterized in that: the cross section of this string of a musical instrument is an irregular shape.

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