JP3981783B2 - Polishing method and polishing apparatus for spherical body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spherical body polishing method and polishing apparatus, and more particularly to a spherical body polishing method and polishing apparatus suitable for uniformly polishing the surface of a spherical body, particularly an elastic spherical body such as a solid core of a golf ball.
[0002]
[Prior art]
The solid core of a golf ball is usually filled with a rubber material in the cavity of this mold using a two-part mold having a spherical cavity inside by separating the upper mold and the lower mold. Molded by vulcanization for a predetermined time under high temperature and pressure.
[0003]
In this way, the solid core taken out from the mold after vulcanization has a rubber material protruding from the mating surface portion of the two-part mold, that is, a burr is formed along the circumference. The core is put on a polishing apparatus for the main purpose of removing.
[0004]
In this case, as a conventionally known solid core polishing apparatus, as shown in FIGS. 6 and 7, a plurality of grooves d having a curved surface shape of the core, for example, five grooves toward the rotation axis f are provided. A cylindrical grooved rotating grindstone b formed side by side, a cylindrical holding grindstone c arranged in parallel with the rotating grindstone b, and a core cradle e between the two grindstones were provided. A polishing apparatus a is used.
[0005]
Since both the grindstones b and c of the polishing apparatus a rotate in the same direction and the rotating grindstone b has a slip ratio, the rotating grindstone b rotates at a higher speed than the press grindstone c and the press grindstone c Is configured to be capable of reciprocating with a predetermined amplitude in parallel with the rotation axis h of the grindstone (in the direction of arrow I in the figure).
[0006]
In the solid core polishing method using the polishing apparatus a, a core g is supplied to each groove position of the rotating grindstone b by a supply means (not shown), and the supplied core g is placed on the core cradle e. The outer surface of the core is polished by the rotational movement of the rotating grindstone b and the pressing grindstone c and the reciprocating movement of the pressing grindstone c.
[0007]
In this case, in the above polishing method, the polishing is performed while water is applied to prevent cooling of the core during the polishing and to prevent clogging of the polishing surface of the grindstone.
When the polishing is completed, the presser grindstone moves backward with respect to the rotating grindstone, and the core cradle tilts. As a result, the core after the polishing falls downward and is sent to the next process for cleaning and drying. It is configured as follows.
[0008]
[Problems to be solved by the invention]
However, in the above polishing method and polishing apparatus, since water is used during polishing, a core cleaning and drying process is always required. In addition, a wastewater treatment facility for removing abrasive debris mixed with water is indispensable, and there is a problem that the cost is increased due to these processes and facilities.
[0009]
Further, in the above polishing apparatus, the random movement of the core is not sufficient at the time of polishing, and the core surface may not be evenly polished, or the core surface may be excessively shaved.
[0010]
The present invention has been made in view of the above problems, and does not require a step of cleaning and drying the spherical body after polishing, and therefore does not require wastewater treatment equipment, and is a method for uniformly polishing the surface of the spherical body at low cost. An object of the present invention is to provide a polishing apparatus.
[0011]
[Means for Solving the Problems]
The present invention provides the following spherical body polishing method and polishing apparatus that achieve the above object.
[0012]
Claim 1:
A polishing wheel having a polishing surface in contact with the spherical body around one side around the spherical body to be polished, and a rotating shaft arranged parallel to the rotational axis of the polishing wheel on the other side, the spherical A presser wheel having an elastic pressing surface that comes into contact with the body, and a columnar work rest that has a spiral feed groove around the spherical body and that is arranged so as to be rotatable in parallel with the rotation shafts of the two wheels. A polishing method for a spherical body using the polishing apparatus, wherein the polishing wheel and the presser wheel are rotated in the same direction and the polishing wheel is rotated at a higher speed than the presser wheel, and the presser wheel is reciprocated along the axial direction. A method for polishing a spherical body, wherein the spherical body is polished while being moved.
[0013]
Claim 2:
The polishing method according to claim 1, wherein the spherical body is supplied from one end side in the axial direction of the polishing wheel to the spiral feed groove of the work rest and is taken out to the other end side by rotation of the work rest.
[0014]
Claim 3:
The polishing method according to claim 1, wherein the spherical body is a solid core of a golf ball.
[0015]
Claim 4:
A polishing wheel having a polishing surface in contact with the spherical body around one side around the spherical body to be polished, and a rotating shaft arranged parallel to the rotational axis of the polishing wheel on the other side, the spherical A presser wheel having an elastic pressing surface that comes into contact with the body, and a columnar work rest that has a spiral feed groove around the spherical body and that is arranged so as to be rotatable in parallel with the rotation shafts of the two wheels. In this polishing apparatus, the polishing wheel and the presser wheel are configured to rotate in the same direction and the polishing wheel can be rotated at a higher speed than the presser wheel, and the presser wheel is configured to be capable of reciprocating along the axial direction. A spherical body polishing apparatus characterized by the above.
[0016]
Claim 5:
The polishing apparatus according to claim 4, wherein the spherical workpiece is supplied from one end side in the axial direction of the polishing wheel and taken out from the other end side by rotating the columnar work rest.
[0017]
Claim 6:
The polishing apparatus according to claim 4 or 5, wherein the polishing surface of the polishing wheel is made of an elastic material having a non-woven fabric of fiber as a base material, and abrasive grains applied and fixed to the base material.
[0018]
Claim 7:
The polishing apparatus according to claim 4, 5 or 6, wherein the presser surface of the presser wheel includes a plurality of circumferential grooves divided toward the rotation axis thereof.
[0019]
According to the present invention, special equipment and a plurality of processes can be omitted, and the outer surface of the spherical body can be evenly polished at a low cost without being excessively shaved.
[0020]
That is, a polishing wheel having a polishing surface around one side around the spherical body to be polished, a presser wheel arranged parallel to the polishing wheel and having an elastic pressing surface around the other, and the spherical shape A method of polishing a spherical body using a polishing apparatus having a spiral feed groove that holds the spherical body below the body and having a columnar work rest disposed in parallel with the two wheels. Polishing the spherical body while rotating the polishing wheel and the presser wheel in the same direction and rotating the polishing wheel at a higher speed than the presser wheel, and reciprocating the presser wheel in parallel along the rotation axis of the presser wheel; Preferably, the polishing surface of the polishing wheel can be polished without using water by using a non-woven fabric of fiber as a base material and an elastic material coated with abrasive grains on the base material and fixed. Since, washing and drying, and waste water treatment facility for removal of swarf that mixed water is not required, in which can be performed inexpensively and efficiently polishing operation.
[0021]
In the present invention, the solid core refers to a solid core (core covered with a cover) in a two-piece golf ball, but in the case of a multi-layer golf ball such as a three-piece or four-piece golf ball, A spherical body including any layer inside the outer layer, specifically, a single-layer, two-layer, or three-layer structure core excluding the cover.
[0022]
Further, according to the present invention, the spherical body can be moved in any direction during polishing, and the surface of the spherical body can be evenly polished without being excessively scraped.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0024]
FIG. 1 is a perspective view of a spherical polishing apparatus according to an embodiment of the present invention, FIGS. 2 and 3 are enlarged plan views of the main part of the apparatus, and FIG. 4 is a side view of the main part of the apparatus. The polishing apparatus 1 is a polishing having a polishing surface 2a on the right side around a spherical body (solid core G in FIG. 1) to be polished held in a spiral feed groove (concave portion) S of a columnar work rest 4. A wheel 2 and a presser wheel 3 having an elastic presser surface 3a on the left side are provided.
[0025]
The polishing apparatus 1 of the present invention is suitable for polishing a spherical body, particularly an elastic spherical body such as a solid core defined before a solid golf ball, a solid center of a wound golf ball, etc. Now, a case where a solid core of a solid golf ball is used as an object to be polished will be described as an example.
[0026]
In this case, as the solid core G, an elastic spherical body whose main material is a normal rubber material such as polybutadiene can be used, and its diameter is usually about 25 to 43 mm. Although not shown in the figure, the burrs are formed around the equator of the solid core by protruding rubber material.
[0027]
In the solid core G, the columnar work rest 4 is rotated by the operation of a rotating mechanism (not shown) while the lower portion of the core G is held in the spiral feed groove (concave portion) S of the columnar work rest 4. At the same time, the core G is rotated while being sequentially fed from one end side to the other end side (in the direction of arrow II in FIGS. 2 and 3) in the direction of the rotation axis 2b of the grinding wheel 2 (presser wheel 3). The polishing surface 2a of the polishing wheel and the elastic pressing surface 3a of the presser wheel are brought into contact with the solid core G almost in the vicinity of the equator while rotating in a fixed direction from both the left and right sides, and the surface of the core can be polished.
[0028]
In this case, the rotational axes H _A , H _B , and H _C of the grinding wheel 2, the presser wheel 3, and the work rest 4 are arranged so as to be parallel to each other (see FIG. 2). Reference numeral 5 denotes a spherical body supply means having a supply port 5a at the tip, 7 is a guide wall, and 8 is a discharge path.
[0029]
The workrest 4 has a radius r _C of 15 to 25 mm and a length W _C extending beyond one end and the other end of the grinding wheel 2 (pressing wheel 3) as shown in FIG. It is formed in a column shape longer by about 150 mm than W _A (presser wheel width W _B ), and the material of this work rest is not particularly limited, and a hard material such as synthetic resin or metal can be used.
[0030]
Here, the spiral feed groove (concave portion) S of the work rest forms a concave portion corresponding to the cross-sectional shape in which the solid core G to be polished is exactly fit (held), that is, the surface shape of the solid core. In this embodiment, the depth of the spiral feed groove is about 8 mm, and the pitch is formed at intervals of about 45 mm.
[0031]
One end of the workrest 4 is connected to a rotation mechanism (not shown), and is formed to be rotatable by the operation of the rotation mechanism. In this case, if the spiral feed groove S of the work rest is a right-hand screw type (a type that moves away clockwise as viewed from the axial direction) as shown in FIG. 2, it can rotate in the direction of arrow Z in FIG. Formed. As shown in FIG. 3, in the case of the left-hand screw type (counterclockwise when viewed in the axial direction), it is formed to be rotatable in the direction of arrow Z ′ in FIG. While the solid core G is rotated by such a rotational movement of the work rest, it is configured so that the core is sequentially fed from one end side to the other end side of the grinding wheel, that is, in the direction of arrow II in the figure. . In this case, the rotation speed of the work rest is usually 10 to 40 rotations / minute.
[0032]
In addition, the other end side of the work rest is connected to the discharge path 8, and the core after the polishing is configured to be transferred to the next process, for example, a cover molding process.
[0033]
As shown in FIGS. 2 to 4, the grinding wheel 2 has a cylindrical shape with a radius r _A of 50 to 200 mm and a width W _A of 100 to 300 mm, and the operation of a drive source not shown in the figure. Is provided so as to be rotatable in the direction of the arrow X in the figure at a rotational speed of 800 to 2,500 rpm.
[0034]
As a material for the polishing wheel 2, a commonly used grindstone can be used. Preferably, the polishing surface 2a of the polishing wheel is based on a nonwoven fabric of synthetic fibers 10 as shown in an enlarged view in FIG. As a material, it is recommended to form an elastic material 9 in which abrasive grains 11 are fixed to the fiber 10 with an adhesive 12. As this elastic material, for example, Scotch Bright (trade name) manufactured by Sumitomo 3M Limited can be used.
[0035]
By forming the polishing surface 2a of the polishing wheel from the elastic material 9 as shown in FIG. 5, the elastic material is more elastic than the grindstone. (Part)) can be prevented as much as possible, and the elastic surface of this elastic material is rough compared to a grindstone, so there is less clogging of the polished surface due to polishing debris and the core can also be prevented from generating heat during polishing. It is unnecessary to use water at the time of polishing.
[0036]
As shown in FIGS. 2 to 4, the presser wheel 3 has a cylindrical shape with a radius r _B of 50 to 150 mm and a width W _{B of} 100 to 300 mm. This presser wheel is rotated in the same direction (arrow Y direction in the figure) as the rotation direction of the grinding wheel (arrow X direction in the figure) at a rotational speed of 10 to 80 revolutions / minute by the operation of a drive source not shown. It is possible to reciprocate (oscillate) in the direction indicated by arrow V in the figure. This reciprocating motion (oscillate) has an amplitude in the range of 5 to 80 mm and a motion speed of 50 to 180 times / minute.
[0037]
In this case, it is necessary to rotate the polishing wheel at a rotational speed considerably faster than that of the presser wheel in order to exert the presser effect of the presser wheel advantageously and to increase the polishing efficiency. The adjustment of the rotational speed is not particularly limited, but can be performed by providing a slip mechanism on both wheels.
[0038]
This presser wheel can be formed from an elastic body such as rubber, and its JIS-A hardness is usually 50 ° to 90 °. In this embodiment, a NBR rubber presser wheel having a JIS-A hardness of 75 ° is used.
[0039]
Further, the presser wheel is provided with a plurality of, preferably 5 to 40, circumferential grooves 6 that divide the presser surface 3a toward the rotation shaft 3b, and the groove width is usually 1 to 5 mm. In this embodiment, seven grooves are formed with a groove width of 2 mm.
[0040]
In this way, the pressing surface of the presser wheel is provided with a plurality of circumferential grooves divided toward the rotation axis, the grinding wheel rotates faster than the presser wheel, and the presser wheel is formed so as to be capable of reciprocal movement. The oscillating effect on the spheres is advantageously increased and the spheres can be moved in all directions, so that the outer surface of the spheres can be ground without over-scraping.
[0041]
Further, the distance between the grinding wheel 2 and the presser wheel 3 is determined by the diameter of the spherical body to be polished, and is formed so as to be appropriately adjustable by a position adjusting mechanism (not shown) provided on both wheels.
[0042]
Incidentally, in the polishing apparatus of the present invention, the positional relationship between the grinding wheel and the press wheel with solid core, as shown in FIG. 4, both the axis H _A of the grinding wheel 2 and the pressing wheel 3, the H _B and solid core that the center angle between H _G alpha is arranged such that the 120 ° to 240 ° is desirable grinding wheel and presser wheel obtained contact at the appropriate angle to the solid core, from the viewpoint of improving the polishing efficiency It is.
[0043]
The polishing apparatus of the present invention has the above-described configuration, so that the spherical bodies are continuously cut one by one, and the outer surface of the spherical bodies is not excessively shaved without using water but at a lower cost than in the past. Moreover, it can be polished evenly.
[0044]
Next, in the polishing method of the present invention, a polishing wheel 2 having a polishing surface 2a in contact with the spherical body on one side around the spherical body G to be polished and a parallel to the polishing wheel 2 on the other side. A presser wheel 3 having an elastic presser surface 3 a that is disposed and abutting the spherical body around it, and a spiral feed groove S that holds the spherical body G around the periphery, and is parallel to the wheels 2 and 3. A method of polishing a spherical body using a polishing apparatus 1 having a columnar work rest 4 disposed therein, wherein the polishing wheel 2 and the presser wheel 3 are set in the same direction, and the polishing wheel 2 is moved at a higher speed than the presser wheel 3. The spherical body is polished while rotating and reciprocating the presser wheel 3 along the axial direction.
[0045]
In this case, it is preferable that the spherical body G is supplied from one end side in the axial direction of the polishing wheel 2 to the spiral feed groove S of the work rest and taken out to the other end side by the rotation of the work rest 4.
[0046]
Specifically, as shown in FIGS. 1 to 4, the solid core G is supplied from the supply port 5 a of the core supply means 5. In this case, the polishing wheel 2, the presser wheel 3 and the work rest 4 rotate in the directions of arrows X, Y and Z (or Z ′) in the figure, respectively, and the presser wheel 3 reciprocates (oscillates) in the direction of arrow V in the figure. Therefore, the core G moves in all directions within the spiral feed groove S (concave portion) of the work rest, and the outer surface of the core is uniformly polished while being sequentially fed, and the polished core is transferred from the discharge path 8 to the next process. It is transferred to. This polishing operation can be performed automatically and continuously unless the core supply is cut off.
[0047]
According to the present invention, since it is not necessary to use any water at the time of polishing, there is no need for a core cleaning and drying process, and there is no need for a waste water treatment facility for removing polishing debris mixed in water. Since the cost can be reduced, the polishing operation can be performed at a low cost.
[0048]
Further, according to the present invention, since the core can be moved in all directions at the time of polishing, the core surface can be uniformly polished without being excessively shaved.
[0049]
In the present invention, the object to be polished is suitable for polishing a spherical body, particularly an elastic spherical body such as a solid core of a solid golf ball or a solid center of a wound golf ball, but is not limited thereto. In addition, the present invention can be applied to the surface polishing of one-piece balls themselves and various golf balls having a core covered with a cover.
[0050]
As mentioned above, although one Example of this invention was described, this invention is not restrict | limited to the said Example, A various change may be carried out in the range which does not deviate from the summary of this invention.
[0051]
【The invention's effect】
According to the present invention, special equipment and a plurality of processes can be omitted, and the outer surface of the spherical body can be polished evenly at a low cost without being excessively shaved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a spherical body polishing apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of the main part of the apparatus.
FIG. 3 is a plan view of another main part.
FIG. 4 is a schematic side view of the apparatus.
FIG. 5 is an enlarged schematic view of a polishing surface of a polishing wheel of the apparatus.
FIG. 6 is a schematic side view of a conventional polishing apparatus.
FIG. 7 is a plan view of the main part of the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Polishing apparatus 2 Polishing wheel 3 Presser wheel 4 Workrest 5 Supply means 6 Circumferential groove 7 Guide wall 8 Discharge path G Spheroid (solid core)
S spiral feed groove

Claims (7)

A polishing wheel having a polishing surface in contact with the spherical body around one side around the spherical body to be polished, and a rotating shaft arranged parallel to the rotational axis of the polishing wheel on the other side, the spherical A presser wheel having an elastic pressing surface that comes into contact with the body, and a columnar work rest that has a spiral feed groove around the spherical body that holds the spherical body and is arranged to be rotatable in parallel with the rotation axes of the two wheels. A polishing method for a spherical body using the polishing apparatus, wherein the polishing wheel and the presser wheel are rotated in the same direction and the polishing wheel is rotated at a higher speed than the presser wheel, and the presser wheel is reciprocated along the axial direction. A method for polishing a spherical body, wherein the spherical body is polished while being moved. The polishing method according to claim 1, wherein the spherical body is supplied from one end side in the axial direction of the polishing wheel to the spiral feed groove of the work rest and is taken out to the other end side by rotation of the work rest. The polishing method according to claim 1, wherein the spherical body is a solid core of a golf ball. A polishing wheel having a polishing surface in contact with the spherical body around one side around the spherical body to be polished, and a rotating shaft arranged parallel to the rotational axis of the polishing wheel on the other side, the spherical A presser wheel having an elastic pressing surface that comes into contact with the body, and a columnar work rest that has a spiral feed groove around the spherical body that holds the spherical body and is arranged to be rotatable in parallel with the rotation axes of the two wheels. In this polishing apparatus, the polishing wheel and the presser wheel are configured to rotate in the same direction, and the polishing wheel can be rotated at a higher speed than the presser wheel, and the presser wheel is configured to be capable of reciprocating along the axial direction. A spherical body polishing apparatus. The polishing apparatus according to claim 4, wherein the spherical workpiece is supplied from one end side in the axial direction of the polishing wheel and taken out from the other end side by rotating the columnar work rest. The polishing apparatus according to claim 4 or 5, wherein the polishing surface of the polishing wheel is made of an elastic material having a non-woven fabric of fiber as a base material, and abrasive grains applied and fixed to the base material. The polishing apparatus according to claim 4, 5 or 6, wherein the presser surface of the presser wheel is provided with a plurality of circumferential grooves divided toward the rotation axis thereof.

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