KR100844257B1 - Manufacturing method of shot distance flying golf ball - Google Patents

Abstract

A method of manufacturing a short-distance golf ball is provided to reduce the defect rate of the golf ball by uniformly injecting a molding material into a mold when forming the golf ball through a dual injection molding. A method of manufacturing a short-distance golf ball comprises the steps of forming an internal core through an injection molding(S1), loading the internal core on the center of a dual injection mold including a plurality of core members(S2), securing the core members by moving the dual injection mold toward the internal core(S3), injecting molding materials through an upper core member(S4), forming an outer body of the golf ball around the internal core(S5), releasing a golf ball product from the dual injection mold(S6), removing a runner from an outer surface of the outer body(S7), and completing the molding process(S8).

Description

Method of manufacturing short-range golf ball {MANUFACTURING METHOD OF SHOT DISTANCE FLYING GOLF BALL}

1 is a process chart showing a manufacturing process of the present invention for producing a short-range golf ball.

Figure 2 is an exploded perspective view showing the configuration of a double injection mold of the present invention short-range golf ball manufacturing method.

Figure 3 is a block diagram showing that the golf ball is double injection by the present invention short-range golf ball manufacturing method.

<Description of the symbols for the main parts of the drawings>

S1: Internal Nuclear Injection S2: Internal Nuclear Loading

S3: double injection mold core contact step S4: injection liquid injection step

S5: Outer body forming step S6: Release step

S7: runner removal step S8: finishing step

S9: gas extraction step

100: double injection mold 10, 10a: core

11: protrusion 12: gate

13 injection portion 14 gas exhaust hole

The present invention relates to a method of manufacturing a golf ball to be blown out at a short distance when hitting, in particular, by injection molding the inner core and the outer body constituting the golf ball simply by a double injection method to improve workability, Protrusions are formed on the inside of the injection mold for forming a sieve, so that a plurality of wind resistance holes are formed on the circumferential surface of the double-injected external body, and the injection molding is evenly injected by dividing the external body injection mold evenly. It relates to a method for manufacturing a short-range golf ball to reduce the defective rate of the golf ball is mass produced.

In general, the golf ball is formed of an outer shell of heterogeneous material having good repulsion or elasticity around the nucleus formed therein. The distance and spin of the ball at the time of hitting the ball depends on how many outer shells are included including the nucleus. The amount is determined, and this type is divided into one-piece balls or two-piece balls.

In addition, it is known that a golf ball flies farther when a predetermined scratch is formed on the surface of the ball, that is, the outer surface of the outer shell, and forms a plurality of dimples on the outer surface of the outer shell. The research and development of Korea is concentrated.

The research and development of materials and dimples related to the nucleus and shell of golf balls are conventional technologies of the form derived under the same purpose, such as increasing the distance of golf balls at the time of hitting or inducing detailed golf techniques. However, there is a problem that the result is a demand for a wider field, resulting in enormous facility and maintenance costs for the golf environment.

This economic burden eventually increases the actual cost of playing golf, not only weakening the public base of golf, but also being neglected and avoided by the public because it is perceived as a leisure sport that promotes a sense of incongruity in a social structure where polarization is apparent. There is no limit.

Moreover, the golf course occupies approximately 180 acres (728424m2; 220356 pyeong) of land, making it difficult to secure the necessary land for golf courses in metropolitan areas or resort areas where golf courses are often established. The cost of land, such as land costs, is incurred.

Therefore, it is urgently required to design a golf course that requires a small acre area and can play all the games of a normal golf course.

On the other hand, in view of this problem has been devised a method for producing a short-range golf ball, the patent application No. 1984-0005621 to obtain the effect of the golf movement in a narrow area by reducing the flying distance of the hit golf ball.

This forms a mixture of thermoplastic, chemical swelling agent and filler material, injects a predetermined amount of the mixture into the golf ball mold cavity, holds the mixture in the mold cavity for a predetermined time, and opens the mold to open the golf ball. Removes and cools the golf ball with cold water and has a density gradient that is made of a thermoplastic polymer and filler foamed by the manufacturing method and increases in radius from the center to the surface of the golf ball. It consists of a golf ball shaped like a hump.

In the case of such a short-range golf ball, the flying distance at the time of hitting the actual golf ball is not formed very short, so that the effect of enjoying golf in a small area is not great and the golf ball is manufactured by the manufacturing method. In the process, the mixture is not evenly injected into the entire inside of the mold, so there is a problem in that a defective rate such as a phenomenon of filling or a part of not being injected.

The present invention has been made in order to solve the problems with the conventional golf ball manufacturing method, the inner core hollow-formed inner core and the inner core is inserted into the double injection mold inside the outer body to wrap the surface of the inner core The double injection molding is performed, but the injection molding is evenly divided by the eight-point injection liquid injection method by equally dividing the multiple injection molds, forming the gate into which the injection liquid is injected, and forming the four-point injection part in the upper core and the lower core, respectively. In addition to reducing the defective rate of the golf ball mass produced by the injection, as well as to form a plurality of projections in the interior of the double injection mold to form a through hole penetrating the surface of the outer body by the through hole Provides a method for manufacturing a short-distance golf ball to prevent the golf ball from flying away in the event of an emergency There is a purpose.

Short-range golf ball production method of the present invention for achieving the above object, the inner core injection step of injection molding the inner core hollow formed; Protrusions are formed therein in the inner cores injected by the inner core injection step, and gates for guiding the injection liquids injected into the inner both ends of the core are formed, respectively, before / after, left / right and upper / lower portions. An internal nuclear charging step of charging at the center of the double injection mold having cores respectively positioned; The dual injection mold composed of cores located at the front / rear, left / right, and upper / lower parts of which the inner core is charged in the center by the inner core charging step is slid to the inner core side to firmly adhere to each core. Injection mold adhesion step; An injection liquid injection step of injecting injection liquid through the upper core adhered by the double injection mold adhesion step; An outer body forming step of guiding the injection liquid injected by the injection liquid injection step through the inner gates of the respective cores to install an outer body on the surface of the inner core; A release step of extracting from the double injection mold a golf ball molding having an outer body formed on the surface of the inner core by the outer body forming step; A runner removal step of removing a runner formed on the outer surface of the golf ball molding extracted by the release step; After the runner removal step is characterized in that it comprises a finishing step of finishing the golf ball molding.

In the process of injecting the injection liquid by the injection liquid injection step may further include a gas extraction step of extracting the gas generated inside the core through the gas exhaust hole penetrated to the outside of the core.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings, and the terminology or words used in the specification and claims are used to explain the invention in its best way. Based on the principle that the concept of can be properly defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

1 is a process chart showing a manufacturing process of the present invention short-range golf ball manufacturing method, Figure 2 is an exploded perspective view showing the configuration of a double injection mold of the present invention short-range golf ball manufacturing method, Figure 3 is a method for producing a short-range golf ball of the present invention. It is a block diagram which shows that a golf ball is injected by double.

As shown in the present invention, the short-range golf ball manufacturing method of the present invention includes an inner core injection step (S1), an inner core charging step (S2), a double injection mold core close contact step (S3), an injection solution injection step (S4), and , By the outer body forming step (S5), the release step (S6), runner removal step (S7), and the finishing step (S8).

The inner core injection step (S1), by injection molding the inner core embedded in the inner side of the short-range golf ball, in the injection of the inner core hollow inside, integrated the inner core by a blower (blower) molding method After injection molding or injection molding into hemispherical shape, the injection molded hemisphere and hemispherical inner core can be welded by various welding operations such as ultrasonic wave, heat and spin.

The internal nuclear charging step (S2) is to charge the internal core injection-molded by the internal nuclear injection step (S1) into a double injection mold, double injection mold 100, the projections 11 are equally therein. It is made by the cores 10 which are protruded at intervals and positioned before and after the gates 12 respectively formed with guides for injection of the injection liquid injected into the inner both ends of the core, respectively.

The protrusion 11 formed on the inner side of the core 10 is for forming a plurality of through holes formed in the outer body of the short-range golf ball manufactured by the method for manufacturing a short-range golf ball according to the present invention, the gate 12 Since the injection liquid guided from is injected to the outside of the protrusions 11, a wind resistance hole is naturally formed in the outer body of the golf ball molding when the core 10 is separated from the air.

In addition, the inner core which is inserted into the inner side of the double injection mold 100 composed of each core 10 by the protrusion 11 formed on the inner side of the core 10 can be firmly supported, As the inner core is not biased to one side, the shape of the protrusions 11 may be formed in various shapes such as squares, triangles, and ellipses in addition to the circular shape.

The dual injection mold core contacting step (S3), the cores 10 which are positioned before / after, the left / right and the upper / lower part of which the inner core is charged in the center by the inner core charging step (S2) Sliding the double injection mold (100) to the inner core side is firmly in close contact with each of the cores 10, the double injection mold (100) consisting of the cores 10 by the tight contact of the cores (10) Even if the injection liquid is injected inside, the injection liquid is prevented from escaping to the outside.

In addition, the injection liquid injection step (S4), the injection liquid is double injection mold 100 through the upper core (10a) of each of the cores 10 in close contact by the double injection mold core adhesion step (S3) Injected into the inner side of the, at this time to form an injection portion 13 to the injection liquid is injected into the upper core (10a), the injection portion 13 is formed of four in the upper and lower cores respectively 8 points injection Injection liquid is injected by the method.

In this way, as a plurality of injection portions are formed without using a single injection portion, and divided injection is simultaneously performed in various directions, the time for which the injection liquid reaches the entire inside of the double injection mold is made equal to the internal nucleus due to the injection pressure. Problems such as crushing are solved and the molding of the golf ball molding is made constant.

 Injection portions 13 formed in the upper core 10a and the lower core are injected through the injection portion 13 by being formed at positions communicating with the gates 12 formed on both sides of the respective cores 10. The injection liquid is guided along the gate 12.

The outer body forming step (S5), the injection liquid injected by the injection liquid injection step (S4) is guided through the gate 12 formed on the inner side of each of the cores 10 to the surface of the inner core By installing the outer body on the inside, the golf ball molding having the outer body surrounding the inner core inside is double injection molded.

The release step (S6), by extracting the golf ball molding formed to surround the outer body on the surface of the inner core by the outer body forming step (S6) from the inner side of the double injection mold 100, wherein the double As the cores 10 constituting the injection mold 100 are slid outwardly, adhesion is released, thereby easily releasing the golf ball molding.

In addition, the runner removal step (S7), to remove the runner formed on the outer surface of the golf ball molding extracted by the release step (S6), the runner is injection liquid to the inner side of the double injection mold (100) It is produced by the guided gate 12, which can be removed automatically by a brower or manually.

As described above, the golf ball molding from which the runner is removed is mass-produced by the finishing step (S8), and the finishing step is performed by a defective rate test or other coloring process such as a full stomach phenomenon.

In the method of manufacturing the short-range golf ball of the present invention, as shown by the respective process steps, the double injection molding process is not only made simple so that the outer body is wrapped on the surface of the inner core, and the double injection mold made of the respective cores is divided. By double injection molding the outer body on the surface of the inner core, it is possible to greatly reduce the defective rate of the injection-molded product.

In addition, as shown in Figure 3 by the injection liquid injection step (S4) the injection liquid is injected into the inner side of the double injection mold 100 composed of the respective cores 10 inside the core 10 The gas extraction step (S9) for extracting the gas generated in the through the gas exhaust hole 14 penetrated to the outside of the core 10 may be further provided, injection of the injection liquid by the gas extraction step (S9) Since the air remaining inside the double injection mold 100, that is, the gas is extracted to the outside through the gas exhaust hole 14, the injection liquid is pushed to one side by the gas pressure, or the molding is performed on the golf ball molding. The problem is not solved properly.

In addition to the present invention, the method for manufacturing short-range golf balls may be variously modified, so that the embodiments to be modified should be interpreted as being included in the scope of the present invention without departing from the scope of the present invention.

As described above, according to the method of manufacturing the short-range golf ball of the present invention, in molding the short-range golf ball composed of the inner core and the outer body, the injection liquid is double injection molded by the divided cores, and the injection liquid is injected into the inner side of the core. As it is guided to the gate formed in the gate can be equally divided and injected, the problem caused by the batching of the golf ball moldings or the injection liquid is not supplied properly is solved, and the injection liquid through the gas pressure by gas extraction The problem that the pushing or molding is not done properly is solved, and the productivity due to the reduction of the defective rate as well as the work efficiency is greatly improved.

Claims (2)

An inner core injection step S1 for injection molding the inner core in which the hollow is formed; Projections are formed in the inner core injected by the inner core injection step, and gates for guiding the injection liquid injected into the inner both ends of the core are formed, respectively, before / after, left / right and up / down, respectively. An internal nuclear charging step (S2) of charging a center of a double injection mold having a plurality of cores positioned therein; The dual injection mold composed of cores located at the front / rear, left / right, and upper / lower parts of which the inner core is charged in the center by the inner core charging step is slid to the inner core side to firmly adhere to each core. Injection mold core contacting step (S3); An injection liquid injection step (S4) of injecting injection liquid through the upper core adhered by the double injection mold adhesion step; An outer body forming step (S5) in which the injection liquid injected by the injection liquid injection step is guided through the inner gates of the respective cores to install an outer body on the surface of the inner core; A release step (S6) of extracting a golf ball molding from which the outer body is formed on the surface of the inner core by a double injection mold by the outer body molding step; Runner removal step (S7) for removing the runner formed on the outer surface of the golf ball molded product extracted by the release step; Short run golf ball manufacturing method characterized in that it comprises a finish step (S8) to finish the golf ball molding after the runner removal step. The method of claim 1, In the process of injecting the injection liquid by the injection liquid injection step, the gas extraction step (S9) is extracted through the gas exhaust hole penetrated to the outside of the core is generated further comprises a Short golf ball manufacturing method.

Images