JP5081412B2 - Resin balls, manufacturing method and manufacturing apparatus thereof - Google Patents

Description

  The present invention relates to a resin ball used for, for example, park golf and ground golf, a method for manufacturing the ball, and a device for manufacturing the ball.

In recent years, park golf and ground golf (hereinafter referred to as park golf, etc.) that can be performed in parks, river beds, and the like are becoming popular because they are easier than general golf performed at golf courses. The ball used in this park golf or the like is a resin ball as disclosed in Patent Document 1. This ball is made of a high-strength hard resin material so that it can withstand the impact at the time of impact, and the inside is formed in a hollow shape so that the weight falls within a specified range.
JP 2002-78829 A

  By the way, when the resin ball is made hollow to have a specified weight as in Patent Document 1, it is difficult to integrally form such a hollow product. After forming the component members, it is necessary to combine and integrate them. In such a case, the number of manufacturing steps increases as the number of steps for integrating the ball constituent members increases.

  In addition, as described above, since the weight and size are defined in park golf or the like, the appearance of the ball tends to be the same. Therefore, it is conceivable to differentiate the product from other products by improving the merchantability by devising the design of the ball. However, considering the cost of the ball, a design that does not increase the number of manufacturing steps is desirable. .

  The present invention has been made in view of such a point, and the object of the present invention is to reduce the number of manufacturing steps and reduce the cost when integrating a plurality of ball constituent members to constitute a ball. , To design and give high merchandise.

  In order to achieve the above object, in the invention of claim 1, as a resin ball invention, the ball is designed using a resin material for integrating the ball constituent members.

Specifically, the first resin material a resin-made ball the first and second ball component integrated in combination obtained by molding a hemispherical shape, the first and second ball component on the outer surface, mutually spacing the plurality of resin filling portion is circumferentially continuously extending while integrating the two ball component from the top side of the first ball component to the top side of the second ball component is formed at a, the above-mentioned resin filler, a structure in which the above first resin member is filled with a second resin material of different colors are welded to the both ball components.

  According to this configuration, the plurality of ball constituent members are integrated into the ball by the second resin material filled in the resin filling portion. Since the second resin material is different from the color of the ball constituent member, a pattern corresponding to the shape of the resin filling portion appears on the ball, and this is the design. In other words, the ball constituent members can be integrated using the second resin material, and the ball can be designed.

Further , the ball is given a striped design by the second resin material. When the ball rolls quickly, the color of the ball appears to the observer as a mixture of the color of the first resin material and the color of the second resin material due to a visual afterimage phenomenon.

In the invention of claim 2, in the invention of claim 1, the second resin material filled in the upper Symbol resin filler is assumed to constitute the mark for striking at the top side of the first ball component .

  According to this configuration, the hitting mark is configured on the top side of the first ball component using the second resin material. As a result, the user of the ball directly applies the striking force of the club to the top side of the first ball component member, aiming at the mark. As a result, a direct striking force does not act on the joint portion of the first and second ball constituent members that are vulnerable to impact compared to the top side.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a concave portion is formed on a joint surface of at least one of the adjacent ball constituent members, and the second resin material is formed in the concave portion. It is set as the structure filled and welded to both ball component members.

  According to this configuration, the bonding strength of the ball constituent member is increased by the second resin material filled in the recess. Since this concave portion is on the joint surface of the ball constituent member, the second resin material filled in the concave portion does not appear on the outer surface of the ball constituent member.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the recess is continuous with the resin filling portion.

  According to this configuration, when the ball is manufactured, the second resin material filled in the resin filling portion can be poured and filled in the recess.

The invention of claim 5 is an invention of a method for producing a resin ball. Specifically, a method of manufacturing a resin ball in which hemispherical first and second ball constituent members are combined and integrated, and a plurality of resin filling portions extending to the top on the outer surface by the first resin material Forming the first ball constituent member formed at intervals in the circumferential direction, and spaced apart from each other so that a plurality of resin filling portions extending to the top on the outer surface are continuous with the resin filling portion of the first ball constituent member. A ball component forming step for forming a second ball component formed by opening the first ball component and the first and second ball components formed in the ball component forming step so that the resin filling portions are continuous with each other. After the combination step and the combination step, the resin filling portion is filled with a second resin material having a color different from that of the first resin material, and the second resin material is welded to both ball constituent members. Configured to and a second resin material filling process that.

  According to this configuration, the ball constituent members are integrated into the ball by the second resin material filled in the second resin material filling step. Since the second resin material is different from the color of the ball constituent member, it is possible to design the ball when the ball constituent member is integrated using the second resin material.

The invention of claim 6 is an invention of a resin ball manufacturing apparatus. Specifically, it is a resin ball manufacturing apparatus in which hemispherical first and second ball constituent members are combined and integrated, and a plurality of resin filling portions extending to the top on the outer surface are spaced apart from each other in the circumferential direction. open the mold for molding the first ball component which is formed at a, from each other intervals so that a plurality of resin-filled portion extending to the top portion to the outer surface is continuous with the resin filler in the first ball component A molding die for molding the second ball constituent member formed in this manner , a first resin material supply part for supplying the first resin material to the cavity of the molding die, and the first and second ball constituent members, The holding portion that is held in a state where the resin filling portions are continuous with each other, and the resin filling portions of the first and second ball constituent members held by the holding portion are different in color from the first resin material. In the molten state the second resin material A constitution in which a second resin material supply unit Kyusuru.

  According to this configuration, when the second resin material supplied from the second resin material supply unit is filled in the resin filling unit, the second resin material is solidified in a state of being welded to the ball constituent member, and the second resin material is solidified. The ball constituent members are integrated with each other to form a ball. Since the second resin material is different from the color of the ball constituent member, it is possible to design the ball when the ball constituent member is integrated using the second resin material.

  According to the first aspect of the present invention, the resin filling portion that is continuous over the outer surface of the adjacent ball constituent member is formed, and this resin filling portion is filled with the second resin material having a color different from that of the ball constituent member. Since it was made to weld to a structural member, while a ball structural member is integrated with a 2nd resin material, a design can be given to a ball | bowl. As a result, when the ball is composed of a plurality of ball constituent members, the design can be given and high merchantability can be achieved while suppressing an increase in the number of manufacturing steps and reducing the cost.

In addition , since the plurality of resin-filled portions are formed so as to have a shape extending in a predetermined direction and spaced apart from each other, a striped design can be applied to the ball. Thereby, it can be shown to an observer in a different design at the time of stationary and rotation of a ball | bowl, and merchantability can be improved further.

According to invention of Claim 2 , the mark for hit | damage can be comprised at low cost using the 2nd resin material. Since the hitting mark is positioned at the top of the first ball constituent member that is relatively resistant to impact, the durability of the ball can be improved.

According to the invention of claim 3 , since the concave portion is formed in the joint surface of the ball constituent member and the concave portion is filled with the second resin material, the joint strength of the ball constituent member can be increased without affecting the ball design. The durability can be further improved.

According to invention of Claim 4 , since the recessed part and the resin filling part were made continuous, the 2nd resin material can be filled into a resin filling part and a recessed part at the time of manufacture, and a manufacturing process is simplified. Can do.

According to the inventions of claims 5 and 6 , when the ball is constituted by a plurality of ball constituent members, the design can be given and high merchantability can be provided while suppressing an increase in the number of manufacturing steps and reducing the cost. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a resin ball 1 according to an embodiment of the present invention. The ball 1 is used in competitions such as park golf, and has a size and weight according to the rules defined in the park golf. Specifically, the ball 1 has a diameter of about 60 mm and a weight of about 100 g.

  As shown in FIGS. 2 and 3, the ball 1 includes a hollow core sphere 2 having a spherical cavity S therein, and a skin material 3 covering the entire outer surface of the core sphere 2. ing. The cavity S is for keeping the weight of the ball 1 within a specified range. As shown in FIG. 5, the central core sphere 2 is a combination of a hemispherical first ball constituent member 10 and a second ball constituent member 20 that are divided by a plane passing through the center of the central core sphere 2. Is made up of. These first and second ball constituent members 10 and 20 are formed by injection-molding a first resin material having both a toughness that does not break due to the striking force of the club and an appropriate elasticity as the ball 1. . Examples of the first resin material constituting the first and second ball constituent members 10 and 20 include an ionomer resin, and specifically, HiMilan (registered trademark) manufactured by Mitsui DuPont Polychemical Co., Ltd. ) Etc. This high Milan has a large number of brands, but a plurality of brands may be used in combination, or a single brand may be used. The color of the first resin material is, for example, yellow.

  Both the first and second ball constituting members 10 and 20 have a bowl shape. As shown in FIGS. 7 and 8, a first concave surface 11 for forming the cavity S is formed at a substantially central portion of the surface of the first ball constituent member 10 facing the second ball constituent member 20. Yes. As shown in FIG. 9, concave first resin filling portions 12, 12,... Are formed on the outer surface of the first ball constituting member 10 at equal intervals in the circumferential direction. These first resin filling portions 12, 12,... Have the same shape, and are formed from the vicinity of the top of the first ball constituent member 10 to the edge on the second ball constituent member 20 side as shown in FIG. Has been.

  The entire depth of each first resin filling portion 12 is uniform. The width dimension, which is the dimension in the circumferential direction of the first resin filling portion 12, is set to be longer as the top portion side of the first ball constituent member 10 is the shortest and closer to the edge portion on the second ball constituent member 20 side. The resin filling portion 12 is tapered toward the top side as a whole. As shown in FIG. 9, the top portion side of the first resin filling portion 12 is separated from the apex of the first ball constituting member 10 and is configured by a curve.

  As shown in FIG. 7 and FIG. 8, the first ball constituent member 10 is joined to the second ball constituent member 20 on the outer surface side of the first concave surface 11 on the surface facing the second ball constituent member 20. A joining surface 13 is formed. Four first grooves 14, 14,... Extending so as to connect the first resin filling portions 12, 12 adjacent in the circumferential direction are formed on the first joint surface 13. These 1st groove | channels 14, 14, ... comprise the recessed part of this invention, are located so that it may correspond to the substantially center part of the depth direction of the 1st resin filling part 12, and the 1st ball | bowl structural member 10 of FIG. A curve is formed along the outer surface. One end portion and the other end portion of each first groove 14 open to the first resin filling portions 12 and 12 adjacent to each other in the circumferential direction. Therefore, the first groove 14 includes the first resin filling portions 12 and 12. 12 is continuous.

  Further, as shown in FIG. 5, a second concave surface 21 and a second concave surface 21 similar to the first concave surface 11 and the first joint surface 13 are formed on the surface of the second ball structural member 20 facing the first ball structural member 10. Two joint surfaces 23 are formed. The second joint surface 23 is joined to the first joint surface 13. Four second resin filling portions 22 having the same shape as the first resin filling portion 12 are formed on the outer surface of the second ball constituting member 20 at equal intervals in the circumferential direction. Further, a second groove 24 is formed on the surface of the second ball constituent member 20 facing the first ball constituent member 10, similarly to the first groove 14.

  On the periphery of the first concave surface 11 of the first ball constituent member 10, a positioning first projection 15 projecting toward the second ball constituent member 20 and a first fitting portion 16 made of a concave portion are 180 in the circumferential direction. And a second fitting portion (not shown) in which the first protrusion 15 is fitted on the peripheral edge portion of the second concave surface 21 of the second ball component member 20 and the first fitting portion. A second protrusion (not shown) that fits into 16 is formed in the same manner. The first protrusion 15 and the second protrusion have the same shape, and the first fitting portion 16 and the second fitting portion have the same shape. The positions of the protrusion 15 and the fitting portion 16 are the first and second ball constituent members in a state where the first protrusion 15 is fitted into the second fitting portion and the second protrusion is fitted into the first fitting portion 16. 10 and 20 are set so that the peripheral edges of the outer surfaces thereof coincide with each other, and the first and second resin filling portions 12 and 22 are in the same position in the circumferential direction and are continuous over the outer surfaces of both ball constituent members 10 and 20. Has been. Further, in the state where the first and second ball constituent members 10 and 20 are combined, as shown in FIG. 4, the open portion of the first groove 14 and the open portion of the second groove 24 coincide to form a closed cross-sectional shape. None, the resin filling portions 12 and 22 adjacent in the circumferential direction and the resin passage R communicating with the resin filling portions 12 and 22 are configured. Further, the first concave surface 11 and the second concave surface 21 form the cavity S as shown in FIG.

  As shown in FIGS. 5 and 6, the first and second resin filling portions 12 and 22 and the resin passage R are made of a second resin material colored in a color different from the first resin material, for example, pink. The welding resin material 30 is filled. As the resin material 30 for welding, the same ionomer resin as a 1st resin material can be mentioned. The welding resin material 30 filled in the first and second resin filling portions 12 and 22 is welded to the portions constituting the resin filling portions 12 and 22 of the first and second ball constituent members 10 and 20. Further, the welding resin material 30 filled in the resin passage R is welded to the portions constituting the first and second grooves 14 and 24 of the first and second ball constituting members 10 and 20, and this welding is performed. The first and second ball constituent members 10 and 20 are integrated with the resin material 30.

  Further, since the colors of the first resin material and the second resin material are different from each other, the welding resin material 30 filled in the first and second ball constituent members 10 and 20 is visible from the outside. It will be. That is, the welding resin material 30 visible from the outside continuously extends from the top side of the first ball constituent member 10 to the top side of the second ball constituent member 20 as shown in FIG. 1 and FIG. The shape becomes thinner as it approaches both ends, and four are arranged at equal intervals in the circumferential direction.

  As shown in FIG. 1 and FIG. 3, both end portions in the longitudinal direction of the welding resin material 30 filled in the first and second resin filling portions 12 and 22 are the first and second ball constituent members 10 and 20. This portion is located in the vicinity of the top of each of the two, and this portion constitutes a mark T for hitting. The user of the ball 1 sees the mark T and directly applies the striking force of the club to the top side of the first ball constituent member 10 or the top side of the second ball constituent member 20. As a result, a direct striking force does not act on the joint between the first and second ball constituent members 10 and 20 that are weaker than the top side.

  The skin material 3 is made of a colorless and transparent third resin material. As a 3rd resin material which comprises this skin material 3, the ionomer resin similar to a 1st and 2nd resin material can be mentioned. The skin material 3 is welded to the outer surfaces of the first and second ball constituent members 10, 20 and is also welded to the outer surface of the welding resin material 30. The thickness of the skin material 3 is set to be thinner than the thickness of the first and second ball constituent members 10 and 20 and is substantially uniform. In this way, the skin material 3 is welded to the first and second ball constituent members 10 and 20 so that the both ball constituent members 10 and 20 are more firmly integrated.

  Since the skin material 3 is colorless and transparent and has no pattern, as shown in FIG. 1, the shape of the welding resin material 30 that extends long as described above appears on the ball 1 as patterns in four places. That is, a striped pattern is formed on the ball 1. On the other hand, since the welding resin material 30 filled in the resin passage R is not visible from the outside of the ball 1, it does not constitute the pattern of the ball 1. Moreover, since the skin material 3 has translucency, a pattern will be seen in the back of the ball | bowl 1, and a feeling of depth and a feeling of depth appear.

  Next, the structure of the manufacturing apparatus used when manufacturing the ball 1 configured as described above will be described. The manufacturing apparatus includes a primary molding portion 41 (shown in FIG. 10) that molds the first and second ball constituent members 10 and 20 at a time, and a secondary that welds the welding resin material 30 to both the ball constituent members 10 and 20. A molding part 42 (shown in FIG. 13) and a tertiary molding part 43 (shown in FIG. 17) for molding the skin material 3 are provided.

  As shown in FIG. 10, the primary molding unit 41 includes a fixed mold 45 and a movable mold 46, and a primary injection machine 47. The movable mold 46 is configured to move in the horizontal direction by a mold moving device (not shown). On the surface of the movable mold 46 facing the fixed mold 45, a first molding surface 48 for molding the outer surface side of the first ball component member 10 is formed in the upper half portion, and the second ball component member 20 is formed in the lower half portion. A second molding surface 49 for molding the outer surface side is formed. A first molding surface 51 that molds the inner surface side of the first ball component member 10 is formed in the upper half portion of the surface of the fixed die 45 facing the movable die 46, and the second ball component member 20 is formed in the lower half portion. A second molding surface 52 for molding the inner surface side is formed. When the fixed mold 45 and the movable mold 46 are clamped, a first cavity 53 is formed by the first molding surfaces 48 and 51, and a second cavity 54 is formed by the second molding surfaces 49 and 52. That is, the fixed mold 45 and the movable mold 46 are molds for molding the ball constituent members 10 and 20. Note that the first ball component member 10 and the second ball component member 20 may be molded using different molds.

  Between the first molding surface 48 and the second molding surface 49 of the movable mold 46, a first gate 57 that communicates with the first cavity 53 and a second fluid that communicates with the second cavity 54 in a clamped state. A gate 58 and a runner 59 are formed. A sprue 60 communicating with the runner 59 is formed in the fixed mold 45, and the nozzle 47 a of the primary injection machine 47 is connected to the sprue 60. The primary injection machine 47 is a well-known machine including a cylinder and a screw (not shown) for kneading and injecting the first resin material. The primary injection machine 47 constitutes a first resin material supply unit.

  As shown in FIG. 15, the secondary molding part 42 includes a fixed mold 61 and a movable mold 62, and a secondary injection machine 63 (shown in FIGS. 14 and 16). The movable mold 62 is disposed above the fixed mold 61 and is moved in the vertical direction by a mold moving device (not shown). On the upper surface of the fixed mold 61, the lower side for molding the welding resin material 30 in a state where the intermediate molded product Y (shown in FIGS. 13 and 14) in which the first and second ball constituent members 10 and 20 are combined is held. A molding surface 64 is formed. Further, an upper molding surface 65 is formed on the lower surface of the movable mold 62 so as to correspond to the lower molding surface 64. These lower and upper molding surfaces 64 and 65 are hemispherical concave surfaces.

  As shown in FIGS. 13 and 14, the lower and upper molding surfaces 64 and 65 have surfaces other than the resin filling portions 12 and 22 among the outer surfaces of the first ball constituent member 10 or the second ball constituent member 20. The intermediate molded product Y is held on the lower and upper molding surfaces 64 and 65 in a state where the fixed mold 61 and the movable mold 62 are clamped. That is, the fixed mold 61 and the movable mold 62 constitute a holding portion of the present invention. In the state where the intermediate molded product Y is held, four cavities 66 are formed by the lower and upper molding surfaces 64 and 65 and the first and second resin filling portions 12 and 22.

  As shown in FIG. 14, on the upper surface of the fixed mold 61, a runner formation groove 68 extending so as to surround the lower molding surface 64 and a gate formation groove 69 extending from the runner formation groove 68 to communicate with each cavity 66. , 69,... And a sprue formation groove 70 extending from the runner formation groove 68 toward the outside of the fixed mold 61. In the mold closed state, a runner is formed by the runner formation groove 68, a gate is formed by the gate formation groove 69, and a sprue is formed by the sprue formation groove 70. The nozzle 63a of the secondary injection machine 63 is connected to this sprue. The secondary injection machine 63 is configured in the same manner as the primary injection machine 47, and is configured to inject the second resin material. The secondary injection machine 63 constitutes a second resin material supply unit.

  As shown in FIG. 17, the tertiary molding unit 43 includes a fixed mold 71 and a movable mold 72, and a tertiary injection machine 73. The movable mold 72 is disposed above the fixed mold 71 and is moved in the vertical direction by a mold moving device (not shown). A lower molding surface 74 is formed on the upper surface of the fixed mold 71, and an upper molding surface 75 is formed on the lower surface of the movable mold 72 corresponding to the lower molding surface 74. These lower and upper molding surfaces 74 and 75 are for molding the third resin material, and are formed as hemispherical concave surfaces. The cavity 76 is formed in a state where the fixed mold 71 and the movable mold 72 are clamped.

  The fixed die 71 and the movable die 72 are provided with holding pins 77 and 77 for holding the core sphere 2 at the approximate center of the cavity 76. A plurality of these holding pins 77 and 77 are provided in the vicinity of the center portion of the lower molding surface 74 and the upper molding surface 75, and the tip portion projects into the cavity 76 by a moving mechanism (not shown) (shown in FIG. 17). ) And a state (shown in FIG. 18) located on the same plane as the molding surfaces 74 and 75. In a state where the holding pins 77, 77 are projected into the cavity 76, the holding pins 77, 77 hit the vicinity of the tops of the first and second ball constituting members 10, 20, and in this state, the core sphere 2 is in the cavity 76. Held in. Further, although not shown, the fixed die 71 is provided with a sprue, a runner, and a gate, and the nozzle 73a of the tertiary injection machine 73 is connected to the sprue. The tertiary injection machine 73 is configured similarly to the primary injection machine 47 and the secondary injection machine 63, and is configured to inject a third resin material.

  Next, a procedure for manufacturing the ball 1 using the manufacturing apparatus will be described. First, as shown in FIG. 10, after the fixed mold 45 and the movable mold 46 of the primary molding part 41 are clamped, the first resin material is put into the first cavity 53 and the second cavity 54 as shown in FIG. Eject. After the first resin material is cooled and solidified, as shown in FIG. 12, the mold is opened, and the first and second ball constituent members 10 and 20 are removed from the mold by push pins (not shown). At this time, the resin material X solidified by a runner or a sprue is also removed from the mold. The above is the ball component forming process.

  Thereafter, the first and second ball constituting members 10 and 20 are combined to obtain an intermediate molded product Y as shown in FIG. This is a combination process. Since the first and second protrusions 15 are fitted into the first and second fitting portions 16 during this combination process, the first and second ball constituent members 10 and 20 are not displaced from each other. Combined in a normal state. The intermediate molded product Y thus combined is placed on the lower molding surface 64 of the secondary molding part 42 as shown in FIG. At this time, the first and second resin filling portions 12 and 22 are made to coincide with the gate groove 69. When the first and second ball constituent members 10 and 20 are combined, for example, after the first ball constituent member 10 is placed on the lower molding surface 64, the first ball constituent member 10 is provided with the second ball constituent member. The members 20 may be stacked.

  As shown in FIG. 13, after the fixed mold 61 and the movable mold 62 are clamped, the second resin material is injected into the four cavities 66, 66,... As shown in FIGS. These are the second resin material filling steps. The second resin material injected into the cavities 66 flows into the resin passage R while flowing through the first and second resin filling portions 12 and 22 toward the peripheral portion thereof, and eventually fills the first and second resins. The portions 12 and 22 and the resin passage R are completely filled. At this time, the second resin material that has flowed into the resin filling portions 12, 22 and 12, 22 adjacent to each other in the circumferential direction flows into the resin passage R located between them from the opposite side, and in this resin passage R You will be hit. Since the resin material in the resin passage R is not visible from the outside, the weld line formed at the end of the resin flow does not affect the appearance of the ball 1. The inflow speed of the second resin material flowing into each cavity 66 can be easily set by the opening area of each gate, the shape of the runner, and the like.

  The high-temperature second resin material flowing into the first and second resin filling portions 12 and 22 is welded to the first and second ball constituent members 10 and 20. The second resin material that has flowed into the resin passage R is also welded to the first and second ball constituent members 10 and 20. Thereby, the 1st and 2nd ball component members 10 and 20 will be pasted up over the perimeter. When the second resin material is cooled and solidified, it becomes the welding resin material 30, and when the fixed die 61 and the movable die 62 are opened, the core sphere 2 is obtained, and the core sphere 2 is pushed out (not shown). ). That is, in the secondary molding part 42, it is possible to apply the above striped pattern design in the process of integrating the ball constituent members 10 and 20 by the welding resin material 30.

  Thereafter, as shown in FIG. 17, after placing the core sphere 2 on the lower molding surface 74 of the tertiary molding portion 43, the fixed die 71 and the movable die 72 are clamped, and the holding pins 77 and 77 are attached. The center sphere 2 is protruded and held at a predetermined position. Then, the third resin material is injected into the cavity 76 by the tertiary injection machine 73 and spread over the entire cavity 76. The third resin material is welded to the outer surfaces of the first and second ball constituent members 10 and 20 and the outer surface of the welding resin material 30. Before the third resin material is completely solidified, as shown in FIG. 18, the third resin material is filled in the traces of the holding pins 77 and 77 by retracting the holding pins 77 and 77. When the fixed mold 71 and the movable mold 72 are opened, a resin ball 1 as shown in FIG. 1 is obtained.

  Therefore, according to the ball 1 according to this embodiment, the first and second resin filling portions 12 and 22 are formed on the outer surfaces of the first and second ball constituting members 10 and 20, and the resin filling portions 12 and 22 Since the welding resin material 30 of a color different from that of the ball constituent members 10 and 20 is filled and welded to both the ball constituent members 10 and 20, the first and second ball constituent members 10 are used by the welding resin material 30. , 20 and the ball 1 can be designed. Thereby, when the ball 1 is constituted by a plurality of ball constituent members 10 and 20, the design can be given and high merchantability can be given while suppressing an increase in the number of manufacturing steps and reducing the cost.

  In addition, since the ball 1 is designed in a striped pattern, when the ball 1 rolls quickly, the color of the ball 1 is changed between the color of the first resin material and the color of the second resin material by the visual afterimage phenomenon. It will look like a mixed color. Thereby, to the observer, the ball 1 can be shown in different designs when stationary and when rotating, and the merchantability can be further enhanced.

  Further, since the hitting mark T is formed in the vicinity of the tops of the both ball constituent members 10 and 20 using the second resin material, the first and second ball constituent members 10 and 20 that are weak against impact compared to the top side. The direct striking force does not act on the joint portion. Thereby, the durability of the ball 1 can be improved.

  In addition, since the first groove 14 and the second groove 24 constituting the resin passage R are filled with the second resin material, the ball components 10 and 20 can be joined without affecting the design of the ball 1. The strength can be increased to further improve the durability.

  Moreover, since the 1st groove | channel 14 and the 1st resin filling part 12 were made continuous, and the 2nd groove | channel 24 and the 2nd resin filling part 23 were made continuous, the 2nd resin material was made into resin filling parts 12 and 22 at the time of manufacture. The resin passage R can be filled at a time, and the manufacturing process can be simplified.

  In addition, the 1st protrusion part 17 and the 1st recessed part 18 are formed in the 1st joint surface 13 of the 1st ball structural member 10 like the modification of embodiment shown in FIGS. May be. The first protrusion 17 is located on the first protrusion 15 side and extends so as to be curved along the outer peripheral surface of the ball 1, and the first recess 18 is on the first fitting part 16 side. It is located and extends in the same manner as the first ridge 17. On the other hand, on the second joint surface 23 of the second ball component member 20, a second recess (not shown) into which the first protrusion 17 is inserted and a second recess that is inserted into the first recess 18. Two ridges (not shown) are formed. The first protrusion 17 and the second protrusion have the same shape, and the first recess 18 and the second protrusion have the same shape. When the first protrusion 17 is inserted into the second recess and the second protrusion is inserted into the first recess 18, when the impact force is received, the first ball component 10 and The second ball component member 20 is less likely to be displaced in the radial direction at the joint portion, and the durability of the ball 1 can be further improved.

  Moreover, in this embodiment, although the four 1st and 2nd resin filling parts 12 and 22 are provided, it is not restricted to this, Three or less may be sufficient and five or more may be sufficient. The size and shape of the first and second resin filling portions 12 and 22 can be freely set. For example, the striking mark T is formed as an arrow shape indicating the vicinity of the top of the first ball component member 10. May be made clearer.

  One of the first groove 14 of the first ball constituent member 10 and the second groove 24 of the second ball constituent member 20 may be omitted.

  Further, the colors of the first resin material and the second resin material are not limited to the colors described above, and can be determined freely. Moreover, the 3rd resin material may be colored if it is a resin material which has translucency.

  As described above, the resin ball, the manufacturing method and the manufacturing apparatus according to the present invention are suitable for a ball used in, for example, park golf.

It is the perspective view which looked at the ball | bowl which concerns on embodiment of this invention from upper direction. It is a side view of a ball. It is a top view of a ball. It is a side view of the intermediate molded product which combined the 1st and 2nd ball component. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is the perspective view which looked at the 1st ball constituent member from the 1st concave side. It is the figure which looked at the 1st ball component from the 1st concave side. It is the figure which looked at the 1st ball component from the top side. It is sectional drawing of the primary shaping | molding part of the ball manufacturing apparatus which concerns on embodiment of this invention. FIG. 11 is a view corresponding to FIG. 10 in a state where the first resin material is injected into the cavity of the primary molding portion. FIG. 11 is a view corresponding to FIG. 10 in a state in which the first and second ball constituent members formed in the primary forming portion are removed from the mold. FIG. 15 is a cross-sectional view corresponding to the line CC of FIG. 14 in a state where an intermediate molded product is held on the molding surface in the secondary molding unit of the ball manufacturing apparatus according to the embodiment of the present invention. It is the figure which looked at the state which put the intermediate molded product on the molding surface of the fixed mold of a secondary fabrication part from the upper part. FIG. 14 is a view corresponding to FIG. 13 in a state in which a second resin material is injected into the cavity of the secondary molding portion. FIG. 15 is a view corresponding to FIG. 14 in a state in which the second resin material is injected into the cavity of the secondary molding portion. It is sectional drawing of the tertiary shaping | molding part of the ball manufacturing apparatus which concerns on embodiment of this invention, and shows the state which hold | maintained the center sphere inside. FIG. 18 is a view corresponding to FIG. 17 in a state in which a third resin material is injected into the cavity of the tertiary molded portion. FIG. 8 is a diagram corresponding to FIG. 7 according to a modified example of the embodiment. FIG. 9 is a diagram corresponding to FIG. 8 according to a modification of the embodiment. FIG. 10 is a diagram corresponding to FIG. 9 according to a modification of the embodiment.

DESCRIPTION OF SYMBOLS 1 Ball 2 Core sphere 3 Skin material 10 1st ball structural member 12 1st resin filling part 13 1st joint surface 14 1st groove | channel (recessed part)
20 Second ball constituent member 22 Second resin filling portion 23 Second joint surface 24 Second groove (concave portion)
30 resin material for welding 45 fixed die for ball component member 46 movable die for ball component member 47 primary injection machine (first resin material supply unit)
53 First cavity 54 Second cavity 61 Fixed mold (holding part)
62 Movable type (holding part)
63 Secondary injection machine (second resin material supply unit)
T Mark for hitting

Claims (6)

A resin ball in which the first and second ball constituent members formed by forming the first resin material into a hemispherical shape are combined and integrated,
Above the outer surface of the first and second ball component, a plurality extending continuously in a state of integrating the two ball component from the top side of the first ball component to the top side of the second ball component resin filler are formed spaced from one another in the circumferential direction of,
A resin ball, wherein the resin filling portion is filled with a second resin material having a color different from that of the first resin material and is welded to the both ball constituent members. The resin ball according to claim 1 ,
The resin ball, wherein the second resin material filled in the resin filling portion constitutes a hitting mark on the top side of the first ball component. In the resin ball according to claim 1 or 2 ,
A concave portion is formed on the joint surface of at least one of the adjacent ball constituent members, and the concave portion is filled with a second resin material and welded to both of the ball constituent members. Resin ball. In the resin ball according to claim 3 ,
A resin ball characterized in that the concave portion is continuous with the resin-filled portion. A method of manufacturing a resin ball in which hemispherical first and second ball constituent members are combined and integrated,
With the first resin material, a plurality of resin filling portions extending to the top on the outer surface are molded into the first ball constituent member formed at intervals in the circumferential direction, and the plurality of resin filling portions extending to the top on the outer surface are the above A ball component forming step for forming a second ball component formed at an interval so as to be continuous with the resin-filled portion of the first ball component ;
A combination step of combining the first and second ball constituent members formed in the ball constituent member forming step so that the resin filling portions are continuous with each other;
After the combination step, a second resin material filling step of filling the resin filling portion with a second resin material having a color different from that of the first resin material and welding the second resin material to both ball constituent members; A method for producing a resin ball. A resin ball manufacturing apparatus in which hemispherical first and second ball constituent members are combined and integrated,
A molding die for molding a first ball component member in which a plurality of resin filling portions extending to the top on the outer surface are formed at intervals in the circumferential direction ;
A molding die for molding a second ball constituent member formed at an interval so that a plurality of resin filling portions extending to the top on the outer surface are continuous with the resin filling portion of the first ball constituent member;
A first resin material supply unit for supplying a first resin material to the cavity of the mold;
A holding portion that holds the first and second ball constituent members in a combined state so that the resin filling portions are continuous with each other;
A second resin material supply unit that supplies, in a molten state, a second resin material having a color different from that of the first resin material, to the resin filling portions of the first and second ball constituent members held by the holding unit; An apparatus for producing a resin ball, wherein:

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