TWI677420B - Park golf club and manufacturing method thereof - Google Patents

Abstract

A manufacturing method of a park golf club includes the following steps: pre-processing: a pre-prepared mold is formed, the mold forms a cavity, the mold is heated to heat the mold, and then a mold release agent is coated on the surface of the cavity; Pouring: Low-pressure infusion of two-liquid foamed polyurethane raw material into the cavity, so that the two-liquid foamed polyurethane raw material foams into the polyurethane foam in the cavity; ripening: leave it for several minutes after pouring to make polyurethane The foam is solidified and matured and shaped into a club head, and the club head forms a hitting surface; demolding: removing the club head from the cavity; drilling: drilling a hole in the top edge of the club head; Surface treatment: Grind the surface of the head to make the surface of the head smooth, and then apply primer, color paint, and topcoat to the surface of the head in order; install the shaft: take a pre-prepared rod Body, inserting the bottom end of the shaft into the shaft hole, and connecting the head with the shaft to form a park golf club.

With the above-mentioned first manufacturing method, the head of a park golf club can be quickly obtained. The present invention can effectively reduce the difficulty of making the head and improve the production efficiency of the head. The head made by the present invention is not easily affected by changes in ambient temperature and humidity.

Description

Park golf club and manufacturing method thereof

The present invention relates to a golf ball for Park Golf, and more particularly, to a park golf club and a manufacturing method thereof.

Park golf is a recreational sport that originated in Japan in the 1980s. Based on the golf ball played in the park, it is named park golf. Park golf only requires a club, a ball, and a ball ladder. Park A golf club is mainly composed of a shaft and a club head. One end of the shaft is connected to the club head, and the other end of the shaft is a handle provided for the player to hold.

The head is generally a block-shaped body made of wood. The body is provided with a carbon fiber composite material hitting plate on one side, and a ball is formed on one side of the body by the hitting plate. Surface, the main body is provided with a bottom plate made of metal at the bottom edge, and the bottom plate is used to adjust the weight of the club head.

Another method for manufacturing the club head is to first cut the wood into a bowl-shaped body, and then fill the bowl with resin to form a filling block, and then install a filler block on the outer surface of the filling block. A carbon fiber composite material hitting board is provided with a metal base plate at the bottom edge of the main body, and a hole is drilled at the top edge of the club head to provide a shaft plug, which can be completed. Manufacturing of the head.

Both of the aforementioned two methods of manufacturing a club head require cutting and processing of wood into a main body. The production of the main body needs to be completed by a person with considerable technical experience. The production of the main body is quite labor-intensive and labor-intensive.

The main body is made of wood processing, which is affected by changes in the temperature and humidity of the environment. It is easy to deform due to thermal expansion and contraction, and the surface hardness and flatness of the wood are not easy to maintain. Therefore, it is necessary to further install carbon fiber composite materials. The hitting plate is used to form the hitting surface for hitting the ball.

The main body made of wood is cut into a bowl shape, and then the inside of the main body is filled with resin to form a head made of the filling block. Similarly, the deformation of the wood material caused by thermal expansion and contraction due to changes in ambient temperature and humidity. The deformation rates of the main body and the stuffing block made of different materials are not the same due to the influence of temperature and humidity, which makes it easy for the main body and the stuffing block to separate or squeeze from each other, and it is easy to produce a gap between the main body and the stuffing block. Problems such as the formation of gaps or the filling block being crushed by crushing affect the stability of the head's movement trajectory when the club swings. The body made by this method also needs to be made of a carbon fiber composite material. The hitting board is used to form the hitting surface for hitting the ball.

After the club head is obtained in the foregoing method, a club hole is dug at the top edge of the club head, and then the bottom end of a club body is inserted into the club hole, so that the club body is connected to the club head to complete the park. Manufacturing of golf clubs.

In view of this, the inventor of this case actively carried out R & D and creation, and finally achieved an innovative and industrially valuable invention.

The main object of the present invention is to provide a park golf club and a manufacturing method thereof, which can quickly produce a park golf club head through a pioneering manufacturing method.

In order to meet the intended purpose, the present invention is a method for manufacturing a park golf club, including the following steps: pre-processing: taking a pre-made mold, the mold forming a cavity, heating the mold, heating the mold, and then The mold cavity is coated with a mold release agent; pouring: low-pressure infusion of the two-liquid type foamed polyurethane raw material into the mold cavity, so that the two-liquid type foamed polyurethane raw material foams in the cavity into a polyurethane foam; ripening: pouring After standing for several minutes, the polyurethane foam is cured and matured into a club head, and the club head forms a hitting surface; demolding: remove the club head from the cavity; drilling: on the club A rod hole is drilled on the top edge of the head; Surface treatment: The surface of the head is ground to make the surface of the head smooth, and then the surface of the head is sequentially coated with primer, color paint and topcoat; Body: Take a pre-prepared shaft, insert the bottom end of the shaft into the hole, and connect the head with the shaft to form a park golf club.

The method for manufacturing a park golf club as described above, wherein before the surface treatment step is completed and the shaft installation step is performed, at least one metal piece is built into the shaft hole, and the weight of the club head is adjusted accordingly.

The method for manufacturing a park golf club as described above, wherein the two-component foamed polyurethane raw material contains isocyanate (A), polyol (B), and auxiliary agent (C), based on 100 weight of isocyanate (A) The amount of the polyol (B) used is between 100 and 200 parts by weight.

The method for manufacturing a park golf club as described above, wherein the auxiliary agent (C) includes a catalyst (C-1), a surfactant (C-2), and a foaming agent (C-3).

As described above, in the method for manufacturing a park golf club, an additive (D) is further added to the two-component foamed polyurethane raw material, and the additive (D) is a chain extender, a cross-linking agent, and a pigment.

The invention relates to a park golf club, which is manufactured by performing the foregoing manufacturing method. The park golf club includes a club head and a shaft. The club head is a polyurethane foam. The head forms a hitting surface on one side, the club head has a hole recessed at the top edge, and the bottom end of the shaft is inserted into the top edge of the club head; the hardness of the club head is expressed as Shore D 38 ~ Shore D 80, the overall average density of the club head is 0.58g / cm ³ to 1.10g / cm ³ , and the weight of the park golf club ranges from 380g to 599g.

(10) ‧‧‧Club head

(12) ‧‧‧batting surface

(20) ‧‧‧Shaft

The first figure is a flowchart of an embodiment of the manufacturing method of the present invention.

The second figure is a partial three-dimensional schematic diagram of a park golf club made by performing the embodiment of the manufacturing method of the present invention.

As shown in the first figure, an embodiment of a method for manufacturing a park golf club according to the present invention includes the following steps: pre-processing: taking a pre-made mold, the mold forming a cavity, and adding the mold The mold is heated to heat, and then a mold release agent is coated on the surface of the cavity.

Pouring: The two-liquid foamed polyurethane raw material is poured into the cavity at a low pressure, so that the two-liquid foamed polyurethane raw material is foamed in the cavity to form a polyurethane foam.

The two-component foamed polyurethane raw material includes an isocyanate (A), a polyol (B), and an auxiliary agent (C). Based on 100 parts by weight of the isocyanate (A), the amount of the polyol (B) used is between 100 and 200 parts by weight.

The preferred implementation of the isocyanate (A) is di-isocyanate.

The auxiliary agent (C) includes a catalyst (C-1), a surfactant (C-2), and a foaming agent (C-3).

Two-component foamed polyurethane raw materials can optionally be added with additives (D), such as: chain extenders, cross-linking agents, and pigments.

Maturation: Allow to stand for several minutes after pouring to cure the polyurethane foam and mature into a club head, and the club head forms a hitting surface on one side.

Demolding: Remove the club head from the cavity.

Drilling: A hole is drilled on the top edge of the club head, and the club hole is used to provide an end of a shaft to be inserted into the club head, and a park golf club is manufactured according to this.

Surface treatment: The surface of the head is ground to make the surface of the head smooth, and then the surface of the head is sequentially coated with a primer, a color paint, and a topcoat.

Weight adjustment: Based on the weight of the club head, one to several metal sheets can be selectively inserted into the club hole to adjust the weight of the club head.

Installing a shaft: Take a pre-prepared shaft, insert the bottom end of the shaft into the shaft hole, and connect the head with the shaft to form a park golf club.

When performing the aforementioned step of installing the shaft, the shaft and the head can be adhered with an adhesive After the shaft is bonded to the head, the adhesive is dried to make the connection between the shaft and the head stable.

After a park golf club is manufactured by performing the foregoing manufacturing method, a grip can be further installed on the top portion of the shaft, and the grip is used to improve the stability and comfort of the user when holding the ball.

As shown in the second figure, the park golf club system made by performing the foregoing manufacturing method embodiment includes a club head (10) and a shaft (20), wherein the club head (10) is a polyurethane foam, The head (10) forms a hitting surface (12) on one side, and the bottom end of the shaft (20) is inserted into the top edge of the head (10).

The park golf club produced by the foregoing manufacturing method has a weight of 380 g to 599 g. The hardness of the head (10) is expressed in Shore hardness as Shore D 38 to Shore D 80. The overall average density of the body (10) It is 0.58 g / cm ³ to 1.10 g / cm ³ .

In the present invention, the head (10) is made by integral molding of a mold. The head (10) is composed of a single component of polyurethane foam, and has high density and high strength. The design of the mold makes the head (10) ) The ball striking surface (12) is formed on one side after molding, and it is not necessary to additionally install a metal ball striking plate. Compared with a multi-step manufacturing method using artificially cut wood, the present invention does not require additional The installation of a metal hitting board can effectively reduce the difficulty of making the head (10), improve the production efficiency of the head (10), and the head (10) made by the present invention is not easily affected by the environment Effects of temperature and humidity changes.

Claims (7)

A manufacturing method of a park golf club includes the following steps: pre-processing: a pre-prepared mold is formed, the mold forms a cavity, the mold is heated to heat the mold, and then a mold release agent is coated on the surface of the cavity; Pouring: Low-pressure infusion of two-liquid foamed polyurethane raw material into the cavity, so that the two-liquid foamed polyurethane raw material foams into the polyurethane foam in the cavity; ripening: leave it for several minutes after pouring to make the polyurethane The foam is solidified and matured and shaped into a club head, and the club head forms a hitting surface; demolding: removing the club head from the cavity; drilling: drilling a hole in the top edge of the club head; Surface treatment: Grind the surface of the head to make the surface of the head smooth, and then apply primer, color paint, and topcoat to the surface of the head in order; install the shaft: take a pre-prepared rod The bottom end of the shaft is inserted into the hole of the shaft, so that the club head and the shaft are connected to form a park golf club; wherein the two-liquid foamed polyurethane raw material contains isocyanate (A), polyol (B ) And auxiliary (C), based on 100 parts by weight of isocyanate (A) The amount of polyhydric alcohol (B) is between 100 to 200 parts by weight. The method for manufacturing a park golf club according to item 1 of the scope of the patent application, wherein before the surface treatment step is completed and the step of installing the shaft is performed, at least one metal piece is built into the shaft hole, and the club head is adjusted accordingly. weight. The method for manufacturing a park golf club according to item 1 of the scope of patent application, wherein the auxiliary agent (C) includes a catalyst (C-1), a surfactant (C-2), and a foaming agent (C-3). The method for manufacturing a park golf club according to item 1 of the scope of the patent application, wherein the two-liquid foamed polyurethane raw material is further added with an additive (D), and the additive (D) is a chain extender, a cross-linking agent, and a pigment. A park golf club made by executing a method for manufacturing a park golf club according to any one of claims 1 to 4 in a patent application scope. The park golf club includes a club head and a A shaft, wherein the head is a polyurethane foam, the head forms a hitting surface on one side, the head is recessed at the top edge with a shaft hole, and the bottom end of the shaft is inserted into the top edge of the head; The hardness of this head is expressed in Shore hardness as Shore D 38 ~ Shore D 80. The park golf club according to item 5 of the patent application scope, wherein the overall average density of the club head is 0.58 g / cm ³ to 1.10 g / cm ³ . The park golf club according to item 5 of the patent application range, wherein the weight of the park golf club is between 380g and 599g.