JP6490906B2 - Game board mold and game board - Google Patents

Description

  The present invention relates to a mold for injection molding a synthetic resin game board provided inside a gaming machine such as a pachinko machine, an arrangement ball, and a sparrow ball, and a game board molded by the mold. .

As is well known, the game board of the pachinko gaming machine is equipped with two guide rails for guiding a game ball to the game area on the surface, and a symbol variation display device and a prize device in the game area surrounded by the guide rails. Such game parts are arranged, and obstacle nails, windmills and the like are implanted around these game parts, thereby having a function of changing the path of the game ball falling in the game area.
By the way, plywood has been conventionally used as a material constituting the game board. However, from the viewpoint of environmental protection and design from the viewpoint that the plywood is prone to product defects due to deformation, in recent years, a game board made of synthetic resin. Are beginning to be used. The game board made of transparent synthetic resin is particularly useful because it can adopt a novel design configuration that cannot be achieved with conventional game boards made of plywood by arranging a pattern variation display device and various decorative members on the back side. .

As a method for manufacturing such a synthetic resin game board, conventionally, an extrusion molding method and an injection molding method are known, and the outer peripheral edge of the game board in the injection mold is molded. By creating a part for forming the positioning part in advance so as to be connected to the part to be played, the positioning part can be formed integrally with the outer peripheral edge of the game board at the same time, and the symbol variation display device and the game part can be attached. Since the openings for use can be formed at the same time, the number of places requiring post-processing can be reduced as compared with the extrusion molding method, and the yield is good and the mass productivity is excellent.
On the other hand, the shape of the game board differs from manufacturer to manufacturer of game machines, or even from the same game machine manufacturer, from model change to model change. In the injection molding method, a mold must be manufactured each time. Therefore, there is a problem that the cost required for the mold is high.

  In addition, in the following Patent Document 1, a die for injection-molding a game board, and a piece for forming a display window for placing a symbol variation display device, is disposed in the die so as to be replaceable. An invention is disclosed in which a different display window can be formed in the center of a game board for each type of gaming machine.

JP 2008-545 A

By the way, the outer shape of the game board differs depending on the manufacturer of the game machine. Therefore, in order to form the game board, it is conventionally necessary to manufacture a unique mold for each manufacturer, which increases the manufacturing cost. However, the invention disclosed in Patent Document 1 can only form openings having different shapes in the game board. For this reason, even if it is the injection mold shown by patent document 1, it is still necessary to manufacture a various mold for every manufacturer, and there exists a problem that manufacturing cost is not fully reduced.
In view of these problems of game board molding molds, the present invention eliminates the need to manufacture a new mold even when the outer shape of the game board to be molded is different, and reduces the cost required for game board molding. It is something that can be done.
The present invention also prevents molding defects caused by wear by preventing wear of the mold.

For this purpose, the mold for forming a game board according to the present invention is such that the outer peripheral edge of a substantially square game board is formed by a plurality of inserts opposed to all the outer peripheral edges of the game board, and each of the inserts is formed. A guide member that moves outward is provided, and the guide member separates each insert from the outer peripheral edge of the game board when the molded product is ejected.
Further, the present invention is characterized in that, in the above game board molding die, each of the inserts is detachably fixed to the guide member.

Further, the present invention is characterized in that in the above game board molding die, the outer peripheral edge of the game board is formed by a plurality of inserts separated for each side of the game board.
For this reason, it becomes possible to shape | mold various game boards from which the shape of an outer periphery differs by replacing | exchanging nest | insert. In addition, the game board can be easily released by separating each nesting from the outer peripheral edge of the game board during ejection.

Further, the present invention is the above game board molding die, wherein the guide member is movable while simultaneously separating the nesting parts from the outer peripheral edge of the gaming board when the molded product is ejected by guiding the nestings obliquely. It is separated from the mold surface.
By doing so, wear due to sliding contact between the insert and the mold surface is prevented, molding defects caused by wear are prevented, and a high-quality game board can always be molded.

Further, the present invention is characterized in that, in the above game board molding die, ears extending radially outward from corners of the game board are formed between adjacent nestings.
Further, the game board according to the present invention is a substantially square synthetic resin game board to be injection-molded, and is formed by a plurality of nestings in which all outer peripheral edges of the game board face the outer peripheral edge. The guide member is moved outward at the time of product ejection, so that each insert is separated from the entire outer periphery of the game board, and each outer periphery is formed.
This improves the quality of the game board.

  According to the present invention, by exchanging the insert, it is possible to form a variety of game boards having different outer shapes, greatly reducing the cost of manufacturing the game boards, and forming a high-quality game board. .

The perspective view which shows an example of the game board shape | molded by the metal mold | die which concerns on this invention. The longitudinal cross-sectional view of the mold closed state of the metal mold | die which shape | molds the game board shown in FIG. FIG. 3 is a view taken along line AA in FIG. 2. The elements on larger scale of FIG. The longitudinal cross-sectional view at the time of game board ejection of the metal mold | die shown in FIG. The longitudinal cross-sectional view at the time of game board ejection of the metal mold | die shown in FIG. The BB line arrow directional view of FIG. The perspective view which shows the other example of the game board shape | molded by the metal mold | die which concerns on this invention. The front view of the movable mold of the metal mold | die which shape | molds the game board shown in FIG. The longitudinal cross-sectional view at the time of game board ejection of the metal mold | die which concerns on this invention.

  Next, a game board molding die and a game board according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a game board manufactured by injection molding into this mold. The game board 1 is formed into a substantially square plate shape having a thickness of about 10 mm by a transparent synthetic resin made of polycarbonate resin, ABS resin, acrylonitrile resin, etc. The front and back surfaces of the game board 1 are flat like a mirror surface. In addition, an opening 2 for attaching a large game component such as an electronic display or a center accessory is formed in the center area in a penetrating manner. The opening 2 is post-processed into a shape necessary for each model of gaming machine. In addition to the opening 2, a variable opening device for starting, a large winning opening device, a normal winning device, a large and small opening for attaching game parts such as a decoration member, and a game ball guide rail are fixed. Mounting holes and the like are formed, and these are also post-processed into a shape necessary for each model of gaming machine. Further, 3a to 3d are ear portions integrally formed so as to extend radially outward from the square portion of the game board 1, and 4a to 4d are positioning holes formed in the ear portions. Reference numeral 5 denotes a filling protrusion formed in a protruding shape in the opening 2 in order to fill the resin from the pin gate of the hot runner 16 described later. In addition, the said ear | edge parts 3a-3d and this protrusion 5 for filling are parts which will be excised if it becomes unnecessary after shaping | molding.

  As shown in FIGS. 2 to 7, the mold for molding the game board 1 is fixed to the fixed mold 11 fixed to the front surface of the fixed plate 10 of the injection molding machine, and is opposed to the fixed mold 11. The movable platen 14 is provided with a movable die 14 fixed to the front surface of the movable plate 12 via a girder member 13. In the state shown in FIG. A cavity is formed between the molds, and molten synthetic resin is injected from the injection nozzle through a sprue bush 15 provided on the stationary platen 10 through a hot runner 16 formed in the fixed mold 11. The game board 1 is obtained by cooling and solidifying the synthetic resin. In addition, 17 is an eject plate provided on the front surface of the movable platen 12, 18 is an eject pin projecting from the eject plate so that the tip thereof faces the cavity of the game board 1, and 19 is a base end of the eject pin 18 It is a stop plate which has fixed the part on the eject plate. In this embodiment, the hot runner mold is injected through the hot runner 16. However, the present invention is not limited to this, and a cold runner mold that takes out the runner portion for each molding shot may be used. .

  As shown in FIG. 3, 20 a to 20 d are plate-like inserts that are provided separately for each side of the game board 1 in order to form the outer peripheral edge of the game board 1. 20a-20d is each arrange | positioned by the mold surface 21 of the said movable mold | type 14 so that a slide toward outward is possible. The shape of the inner peripheral edge of each of the inserts 20a to 20d is cut out into a shape that can form the required outer shape of the game board 1 respectively. Further, both end edges of each of the inserts 20a to 20d are notched obliquely so that adjacent inserts can be matched with each other, and the ear portions 3a to 3d of the game board are formed between the inserts. It is formed in a concave shape.

  Next, guide means for moving the inserts 20a to 20d outward as indicated by arrows in FIG. 3 at the time of ejecting the molded product will be described. Reference numerals 22a to 22d denote a plurality of guide members arranged so as to be independently movable inward and outward near the outer peripheral edge of the movable die 14, and the nestings 20a to 20d are respectively connected to the guide members 22a to 22d. A number of screws 23 are detachably secured. Then, guide pins 30 are respectively provided on the back surfaces of the guide members 22a to 22d so as to be inclined inward at an angle α (about 15 degrees), and the guide pins 30 are passed through the inner bottom portion of the movable die 14. A long guide hole 32 is formed in the stop plate 19 so as to protrude from the back surface of the movable die 14, and a slide shoe 31 fixed to the tip of the guide pin 30 is loosely fitted in the guide hole 32. The slide shoe 31 is slidably brought into contact with the surface of the eject plate 17.

  In the game board molding die thus configured, the synthetic resin injected into the cavity is cooled and solidified, and the game board 1 is molded in the cavity, and then shown in FIGS. Thus, the movable platen 12 and the movable die 14 are retreated so that the mold is opened, and then a protruding rod (not shown) hits the ejecting plate 17 so that the ejecting plate 17 protrudes, so that the ejecting plate 17 ejects the ejecting pin. 18 protrudes from the mold surface 21, and the game board 1 is released. At this time, the guide pin 30 is also pushed by the eject plate 17, and the guide pin 30 moves the guide members 22a to 22d diagonally outward. For this reason, the inserts 20 a to 20 d fixed to the guide members 22 a to 22 d move outward while being separated from the mold surface 21. For this reason, as the game board 1 is ejected, the nestings 20 a to 20 d are separated from the outer peripheral edge of the game board 1.

In this way, in this game board molding die, the inserts 20a to 20d are separated from the outer peripheral edge of the game board 1 when the molded product is ejected, so that an unreasonable force is applied to the game board 1 even if the eject pin 18 protrudes. It is possible to prevent mold deformation and molding defects of the game board 1 without releasing the mold. For this reason, it is not necessary to provide an eject pin for releasing on the outer peripheral portion of the game board 1, and there is no protrusion of the eject pin remaining on the outer peripheral portion of the game board 1. Can be molded.
Further, since the inserts 20a to 20d move outward while being separated from the mold surface 21 when the molded product is ejected, the friction between the inserts 20a to 20d and the mold surface 21 is minimized, and the inserts 20a. Even when -20d is repeatedly moved, the frictional surface between the inserts 20a-20d and the mold surface 21 is not worn, and the mold surface 21 can be kept smooth for a long time so that the molten resin can enter. No gaps are created. For this reason, the front surface or the back surface of the game board 1 to be molded is always kept in a mirror shape, can prevent irregular reflection and ensure transparency, and can always mold a high quality game board.
Since the inserts 20a to 20d are moved outward when the mold is opened as described above, the mold release is facilitated without providing a so-called draft (inclination) on the outer peripheral surface of the game board 1. . Therefore, it is possible to form the game board 1 so that the outer peripheral surface thereof is perpendicular to the front and back surfaces.

  As described above, the game board 1 formed in this way has a large and small opening for attaching a game part including the opening 2 with the positioning holes 4a to 4d formed in the ears 3a to 3d as a reference. By cutting into a shape according to the type of machine, post-processing such as cutting the game board 1, pasting a transfer sheet, attaching game parts, improving the processing accuracy, Handling becomes easy and it can prevent that a game board surface is damaged at the time of these processes. The ears 3a to 3d are excised if they are no longer needed.

FIG. 8 illustrates a game board 1a that is intended for other gaming machine manufacturers and has a different external shape from the game board 1 shown in FIG. When the game board 1a is molded using the game board molding die, the inner peripheral shape of the inserts 20a to 20d matches the outer peripheral shape of the game board 1a as shown in FIG. The inserts 20e to 20h formed in advance are exchanged. For this purpose, it is possible to easily replace the screw 23 by simply removing the screw 23 and replacing it with a new insert 20e to 20h. The outer periphery of the game board 1a is formed by the inserts 20e to 20h. When the molds are opened, the guide members 22a to 22d move the nestings 20e to 20h outward, so that they can be easily released from the mold. Thus, according to this metal mold | die, the game board 1a from which an external shape differs can be shape | molded only by replacing | exchanging four nest | inserts 20a-20d with other nest | insert 20e-20h. In addition, since the ear | edge parts 3a-3d are shape | molded by adjacent nest | insert 20a-20d, the ear | edge part of a different shape can be shape | molded only by replacing | exchanging this nest | insert 20a-20d.
In this embodiment, the nesting is separated for each side of the game board (divided into four parts). However, the nesting is divided into two parts, and the shape of each nesting is substantially L-shaped to combine the two nestings. The outer peripheral edge may be molded.

  In addition, the transparent game board has various decorative members such as a symbol variation display device and electric decoration on the inner side, so that a player in the game can clearly see through the game board 1 and Because the light passes well, it is possible to create a novel production with a free design. However, the game board according to the present invention is not limited to a colorless and transparent synthetic resin, but can be molded from a colored transparent synthetic resin, a translucent or translucent synthetic resin, or an opaque synthetic resin.

  Moreover, in the metal mold | die shown in this Example, as the structure of a guide means, when the protruding rod contacts the eject plate 17, the eject plate 17 protrudes, and when the guide pin 30 is pushed by the eject plate 17, each nest 20a The guide means is structured such that an actuator 33 such as a hydraulic cylinder is provided on the eject plate 17 and the operating rod 34 of the actuator 33 protrudes as shown in FIG. The eject plate 17 is moved away from the movable plate 12 by pressing the movable plate 12, and the eject plate 17 moves the inserts 20a to 20d outward by pressing the guide pins 30 at that time. Also good.

DESCRIPTION OF SYMBOLS 1 Game board 2 Opening 3a-3d Ear | edge part 4a-4d Positioning hole 5 Filling protrusion 10 Fixed board 11 Fixed mold 12 Movable board 13 Girder member 14 Movable mold 15 Sprue bush 16 Hot runner 17 Eject board 18 Eject pin 19 Stop Plates 20a to 20d Nest 21 Mold surfaces 22a to 22d Guide member 23 Screw α Angle 30 Guide pin 31 Slide shoe 32 Guide hole

Claims (3)

A game board molding die comprising a fixed mold and a movable mold for molding a substantially square plate-shaped game board with flat front and back surfaces , each having a plurality of guide members near the outer periphery of the movable mold A plurality of separate nestings , which are arranged so as to be independently movable inward and outward , and which are opposed to the outer peripheral edge of the game board, are detachably fixed to the inner peripheral edge of each guide member, and are attached to the back surface of the guide member. projecting so as inwardly inclined guide pins, by sub physician moves the guide member to the inclination of the guide pins press the guide pins during the molding article ejected, the surface each nesting of the game board Alternatively, the mold for forming a game board is characterized in that it moves outward while being separated from the mold surface for molding the back surface.   2. The game board molding die according to claim 1, wherein the nesting is formed separately for each side of the game board. By forming the opposite portions of the adjacent nesting that match when the mold is closed into a concave shape, ears extending radially outward from the corners of the game board are integrally formed, and positioning holes are formed in the ears. 3. The game board molding die according to claim 1 or 2, characterized in that it can be formed.

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