JP2008126560A - Rubber molding machine, method and apparatus for producing rubber member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the quality of a ribbon-shaped rubber material and a rubber member formed from the ribbon-shaped rubber material by making the cutting shape of the ribbon-shaped rubber material molded by a rubber molding machine uniform. <P>SOLUTION: The ribbon-shaped rubber material 5 is molded continuously by extruding rubber from the opening 13B of the mouthpiece 13 of the rubber molding machine, wound onto a rotating support, and laminated to form the rubber member. Simultaneously with the completion of rubber member forming, the molding of the ribbon-shaped rubber material 5 is stopped, and the ribbon-shaped rubber material 5 is cut by the cutting means 31 of a cutting device 30. When cutting, the cutting means 31 is moved from a standby position by a moving means to cross the opening 13B while the opening plane 13A of the mouthpiece 13 is slid, and the ribbon-shaped rubber material 5 is cut along the opening plane 13A by a cutting blade 31A. After that, the cutting means 31 is separated from the opening plane 13A and moved reversely while being prevented from contacting the cutting end of the ribbon-shaped rubber material 5 to the original standby position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rubber molding apparatus that molds a ribbon-shaped rubber by extruding rubber from an opening of a base, a rubber member manufacturing apparatus that laminates the ribbon-shaped rubber molded by the rubber molding apparatus, and a rubber member. It relates to a manufacturing method.

  A rubber member, for example, a pneumatic tire, is generally composed of a plurality of tire constituent members such as a reinforcing member such as a rubber-coated cord, a tread or a sidewall that is a rubber member, and an unvulcanized green tire by combining these members. It is manufactured by molding (raw tire) and vulcanization molding. Conventionally, as an apparatus for manufacturing this green tire, unvulcanized ribbon-like rubber (long rubber member) is automatically wound in a spiral manner on the outer surface of a rotating support such as a rigid core or a molding drum and laminated. A tire manufacturing apparatus for forming a predetermined cross-sectional shape is known (see Patent Document 1).

FIG. 5 is a side view schematically showing a schematic configuration of the conventional tire manufacturing apparatus and a rubber member forming procedure.
As shown in FIG. 5A, the tire manufacturing apparatus 100 continuously includes a support body (here, a molding drum) 101 that can rotate around a toroidal or cylindrical axis, and a ribbon-shaped rubber 102 having a predetermined cross-sectional shape. And a rubber molding device 110 for extrusion molding. Further, the rubber molding device 110 includes an extruder 111 for heating and kneading and feeding rubber, a gear pump 112 having a pair of gears 112A connected to the tip thereof, a base 113 attached to the rubber discharge port, and the like. In addition to the configuration, the rubber molding apparatus 110 is provided with a moving mechanism (not shown) for moving the rubber molding apparatus 110 toward and away from the molding drum 101.

  When green tires are molded by the tire manufacturing apparatus 100, first, the rubber molding apparatus 110 is brought close to the molding drum 101 (see FIG. 5A), and the tip of the base 113 is moved a predetermined distance from the outer surface of the molding drum 101. Place it at a distance. Next, the rubber kneaded from the extruder 111 is sent to the gear pump 112 (see FIG. 5B), and the pair of gears 112A of the gear pump 112 is rotated in synchronization with each other in the opposite direction (rubber discharge direction) to generate rubber of a predetermined pressure. The ribbon-shaped rubber 102 is formed by supplying the base 113 and extruding rubber from the opening of the base 113. After a predetermined amount of this ribbon-like rubber 102 is attached to the outer surface of the molding drum 101, the molding drum 101 is rotated (see FIG. 5C), and the ribbon-like rubber 102 pushed out from the base 113 is wound around the outer surface of the molding drum 101. .

  Subsequently, the rubber molding apparatus 110 is separated from the molding drum 101 (see FIG. 5D), and the ribbon-like rubber 102 is spirally wound while overlapping a part thereof, and one or a plurality of layers are laminated to form a rubber such as a tread. A member is formed into a predetermined cross-sectional shape, and a green tire is molded by combining with other tire constituent members. Further, in the tire manufacturing apparatus 100, when the formation of the rubber member is completed, the pair of gears 112A of the gear pump 112 is rotated in reverse, the rubber discharge pressure is reduced, and the molding of the ribbon-shaped rubber 102 is stopped. Then, the ribbon-shaped rubber 102 is pulled between the die 113 and the molding drum 101 by rotating the molding drum 101, and the ribbon-shaped rubber 102 is stretched and thinly cut.

  However, when the ribbon-like rubber 102 is cut in this way, the tip portion (cut end portion) of the ribbon-like rubber 102 left on the base 113 side is entangled by, for example, the restoring force of the stretched rubber to form a dumpling-like lump. There is a tendency that the shape of the tip portion is uneven, such as being curved without being equal to the left and right shapes. Therefore, in this conventional tire manufacturing apparatus 100, it is difficult to maintain a constant cutting shape for each cutting of the ribbon-shaped rubber 102, the uniformity thereof is lowered, and the thickness, shape, quality, etc. of the ribbon-shaped rubber 102 are reduced. In addition to variations, the rubber member (tire) after lamination may be deteriorated in quality due to non-uniform shape. Further, such an irregular tip shape of the ribbon-shaped rubber 102 is not preferable as a tip shape of a member for starting lamination, for example, the tip is pasted at a position shifted from a predetermined position of the molding drum 101, Or it may adhere to the other part of the tire manufacturing apparatus 100, and the smooth manufacture of the ribbon-like rubber 102 and the rubber member may be hindered, which may hinder the automatic operation of the tire manufacturing apparatus 100.

  Further, in the tire manufacturing apparatus 100, since the rotation of the molding drum 101 is used for cutting the ribbon-shaped rubber 102, the altered rubber is discharged from the rubber molding apparatus 110 called emptying, which is performed after a long period of stoppage. There is a problem in that the ribbon-shaped rubber 102 cannot be automatically cut during a work performed without rotating the molding drum 101, such as a disposal work, which requires labor and labor for the cutting. Similarly, in the case of cutting in this way, even when the rubber molding apparatus 110 is used alone and operated, such as only trial manufacture or manufacture of the ribbon-shaped rubber 102, it is necessary to manually cut the ribbon-shaped rubber 102. Therefore, it is difficult to improve the efficiency of manufacturing the ribbon-like rubber 102 because automatic operation cannot be performed.

JP 2006-159622 A

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to enable automatic and easy cutting of a ribbon-like rubber formed by a rubber forming apparatus and to make the cutting shape uniform. And improving the quality of the ribbon-shaped rubber and the rubber member formed using the ribbon-shaped rubber, while facilitating the production thereof.

The invention of claim 1 is a rubber molding apparatus for molding a rubber-like rubber by extruding rubber from an opening of a die, and traverses the opening while sliding on an opening surface provided with the opening of the die. And cutting means for cutting the ribbon-shaped rubber, and when cutting the ribbon-shaped rubber, after cutting the ribbon-shaped rubber by moving the cutting means from a standby position before cutting the ribbon-shaped rubber, And a moving means of the cutting means for moving the cutting means away from the opening surface to the standby position.
According to a second aspect of the present invention, in the rubber molding apparatus according to the first aspect, the moving means contacts the opening surface with a first displacing means for displacing the cutting means in a direction transverse to the opening. And second displacing means for displacing the cutting means in the separating direction.
According to a third aspect of the present invention, in the rubber molding apparatus according to the first or second aspect, the moving means moves the cutting means in the width direction of the ribbon-like rubber while sliding the opening surface. The ribbon rubber is cut in the width direction while traversing the opening.
According to a fourth aspect of the present invention, in the rubber molding apparatus according to any one of the first to third aspects, the moving means moves the cutting means to the standby position, and at least a part of the cutting means is the opening. It waits until the said ribbon-shaped rubber | gum is cut | disconnected in the state which contacted the surface.
A fifth aspect of the present invention is the rubber molding apparatus according to any one of the first to fourth aspects, further comprising a heating means for heating the cutting means.
The invention of claim 6 is a rubber member manufacturing apparatus for manufacturing a rubber member by laminating ribbon-like rubber, and the rubber-forming apparatus according to any one of claims 1 to 5 for forming the ribbon-like rubber. A rotatable support that winds the ribbon-shaped rubber around the outer surface, and a ribbon that forms the rubber member by laminating the ribbon-shaped rubber formed by the rubber molding apparatus on the outer surface of the support. And a sticking means for the rubber-like rubber.
According to a seventh aspect of the present invention, there is provided a rubber member for producing a rubber member by extruding rubber from an opening of a base of a rubber molding device to form a ribbon-like rubber, and laminating the ribbon-like rubber on an outer surface of a rotating support. A manufacturing method, the step of forming the ribbon-shaped rubber by the rubber molding device, the step of winding the molded ribbon-shaped rubber around the outer surface of the support, and forming the rubber member, A step of stopping the formation of the ribbon-shaped rubber by the rubber molding device in accordance with the completion of the formation of the rubber member, and cutting the ribbon-shaped rubber by a cutting means. The ribbon-shaped rubber is moved from the standby position before cutting the ribbon-shaped rubber toward the ribbon-shaped rubber, and the ribbon-shaped rubber is cut by traversing the opening while sliding the opening surface provided with the opening of the base. Process Characterized the step of moving to the standby position by separating the cutting means cut the ribbon rubber from said opening surface, in that it consists of.

  According to the present invention, the ribbon-shaped rubber molded by the rubber molding apparatus can be easily and automatically cut, and the cutting shape can be made uniform, and the quality of the rubber-shaped member formed using the ribbon-shaped rubber and the ribbon-shaped rubber. The production can be facilitated while improving the above.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The rubber member manufacturing apparatus of the present embodiment forms a ribbon-like rubber by extruding rubber from an opening of a base of a rubber molding device, and rolls and laminates the ribbon-like rubber while adhering to the outer surface of a rotating support. In the following, as in the conventional tire manufacturing apparatus 100 shown in FIG. 5, a tire constituent member, which is a rubber member, is formed to form a green tire. An example of a tire manufacturing apparatus will be described.

FIG. 1 is a side view schematically showing a main part of the tire manufacturing apparatus of the present embodiment.
As shown in the figure, the tire manufacturing apparatus 1 includes a support 2 that can rotate around an axis, a rubber molding apparatus 10 that molds a ribbon-like rubber 5 (only the front end side is shown in the figure), and a gap between them. A sticking means 20 for the ribbon-like rubber 5 composed of a pair of rollers 21, 22 and the like, and a control device 40 for controlling the entire device 1 and the like are provided.

  The support 2 is used for laminating the ribbon-shaped rubber 5 such as a rigid core having a substantially toroidal outer shape corresponding to the shape of the green tire to be molded, a molding drum having a substantially cylindrical outer surface, and the like. Here, the ribbon-shaped rubber 5 is laminated using a rigid core. That is, in the tire manufacturing apparatus 1, the support (rigid core) 2 is rotated around the axis by a rotation driving means (not shown) made of an electric motor or the like (in the drawing, rotated clockwise as indicated by an arrow), A tire constituent member or ribbon-like rubber 5 is wound around the outer surface.

  The rubber molding apparatus 10 is for continuously extruding the unvulcanized ribbon-shaped rubber 5 having a predetermined cross-sectional shape, so that the molding of the ribbon-shaped rubber 5 can be started and stopped at a predetermined timing, and The molding speed, temperature, etc. can be adjusted. In the present embodiment, the rubber molding apparatus 10 includes an extruder 11 (only the tip portion is shown in the figure) that heats and kneads and feeds the rubber, and a gear pump 12 having a pair of gears 12A and 12B connected to the tip portion. The ribbon-shaped rubber 5 is formed, stopped, and the like based on a control signal from the control device 40 and the like.

  Specifically, in this rubber molding apparatus 10, rubber kneaded from the extruder 11 is sent to the gear pump 12, and the pair of gears 12A, 12B of the gear pump 12 are in opposite directions (rubber discharge direction, which is the arrow direction in the figure). The rubber of a predetermined pressure is supplied to the base 13 by rotating in synchronization with This rubber is extruded from the opening (rubber discharge port) of the base 13 and formed into a cross-sectional shape corresponding to the shape of the opening, and the ribbon-like rubber 5 having this predetermined cross-sectional shape is continuously formed toward the sticking means 20. Supply. Further, the rubber molding apparatus 10 stops the supply of rubber to the base 13 by, for example, sending out the rubber from the extruder 11 or stopping the rotation of the gears 12A and 12B of the gear pump 12, and from the opening. The extrusion of the rubber is stopped and the forming of the ribbon-like rubber 5 is stopped.

  The affixing means 20 is for affixing and laminating the ribbon-shaped rubber 5 molded by the rubber molding apparatus 10 on the outer surface of the rigid core 2 to form a rubber member having a predetermined shape. It arrange | positions so that the opening part of the nozzle | cap | die 13 may be located in the vicinity (rubber entrance side) between the upper rollers 22. FIG. The sticking means 20 forms the ribbon-like rubber 5 supplied from the base 13 into a predetermined cross-sectional shape by rolling between the rollers 21 and 22, and also has one of the rollers (here, the lower roller 21). The outer peripheral surface is arranged in the vicinity of the outer surface of the rigid core 2 with a predetermined distance therebetween to form a sticking roller for adhering the ribbon-like rubber 5 to the rigid core 2, and the other upper roller 22 is located above the lower roller 21. It is arranged to face.

  Each of these rollers 21 and 22 has a rotatable disk shape, is provided with a rotational axis direction parallel to each other and with a gap of a predetermined dimension between the outer peripheral surfaces, and is reverse to each other by a rotation driving means (not shown). Rotated at a predetermined speed in the direction (in the figure, the lower roller 21 rotates counterclockwise and the upper roller 22 rotates clockwise). Further, in this sticking means 20, the diameter of the contact surface (outer peripheral surface) of the ribbon-like rubber 5 of the lower roller 21 is made larger than that of the upper roller 22, and the ribbon-like rubber 5 that has passed between the rollers 21, 22 is passed. Is held by the rotating lower roller 21 and guided to a position where it is affixed to the rigid core 2, and is pressed against the outer surface of the rigid core 2 for pressure bonding. Thus, the sticking means 20 sticks the ribbon-like rubber 5 to the ribbon-like rubber 5 on the outer surface or the lower layer of the rigid core 2 or a tire component member, and laminates the rubber member into a predetermined cross-sectional shape or the like. To do.

  Further, in the tire manufacturing apparatus 1 of the present embodiment, when the rubber molding apparatus 10 stops forming the ribbon-like rubber 5 such as when the rubber member is laminated and formed, the ribbon-like rubber 5 is automatically moved on the base 13 side. The rubber molding apparatus 10 is provided with a cutting device 30 for that purpose.

FIG. 2 is an enlarged plan view showing the vicinity of the cutting device 30 viewed from the X direction in FIG. 1, and schematically shows an essential part of the cutting device 30 and the like.
As shown in the figure, the cutting device 30 is provided in the vicinity of the base 13 of the rubber molding device 10, and includes a cutting means (cutting member) 31 that is a cutter having a cutting blade 31A for cutting the ribbon-like rubber 5, and a cutting device 30. It comprises a moving means 35 of the cutting means 31 for moving the means 31 in the cutting direction of the ribbon-like rubber 5 or the like.

  The cutting means 31 is formed in a substantially rectangular plate shape, and one end portion (lower end portion in the figure) is formed in a substantially triangular shape in which the thickness gradually decreases toward the tip, and that portion is used as the cutting blade 31A. The ribbon-shaped rubber 5 extruded from there is cut by the cutting blade 31A while crossing the opening while sliding on the opening surface 13A (here, the tip surface) provided with the opening of the base 13. That is, the cutting means 31 slides with the cutting blade 31A facing the ribbon-like rubber 5 and pressed against the opening surface 13A to cross the opening from one end side to the other end side, thereby opening the opening surface 13A. Using the (opening edge) as an anvil (cutting board), the ribbon-shaped rubber 5 is cut along the opening surface 13A.

  The moving means 35 movably holds the cutting means 31 and moves the vicinity of the opening surface 13A of the base 13 at a predetermined speed. Before cutting the ribbon-like rubber 5 during molding or lamination, the cutting means 31 is moved to the ribbon. It waits in the predetermined standby position which does not contact the rubber-like rubber 5. The moving means 35 moves the cutting means 31 from the standby position before cutting toward the ribbon-shaped rubber 5 when the ribbon-shaped rubber 5 is stopped (cut), and the opening surface 13A as described above. The ribbon-shaped rubber 5 is cut across the opening while sliding. Thereafter, the moving means 35 moves the cutting means 31 away from the opening face 13A by moving the cutting means 31 in the pushing direction of the ribbon-like rubber 5 or in a direction orthogonal thereto, and the opening face 13A and the opening (cut ribbon-like rubber 5). ) Is moved to the original standby position so as not to touch, and waits until the next cutting.

  In the present embodiment, the moving means 35 is in contact with and separated from the opening surface 13A by a first displacing means 36 for displacing the cutting means 31 in a direction (vertical direction in the figure) across the opening of the base 13. The second displacing means 37 for displacing the cutting means 31 in the left-right direction (in the drawing) is linked, and the cutting means 31 is displaced in both directions in conjunction with these to move as described above. Each of these displacement means 36, 37 is a known displacement means such as a pneumatic or hydraulic piston / cylinder mechanism, a linear displacement mechanism comprising a step motor, a rack, a pinion, and the like. The cutting means 31 is displaced by arranging the piston and cylinder mechanisms in different directions.

  That is, in the moving means 35, the second displacement means 37 (air cylinder part) is attached to the tip of the piston rod 36A of the first displacement means 36, and the advance and retreat directions of the piston rods 36A and 37A are orthogonal to each other. At the tip of the piston rod 37A of the second displacing means 37, the cutting means 31 is placed on the opposite end of the cutting blade 31A so as to be substantially parallel to the advancing / retreating direction of the piston rod 36A of the first displacing means 36. To fix. Further, the second displacement means 37 and the cutting means 31 are displaced by the first displacement means 36 so that the displacement directions thereof are substantially parallel to the width direction of the ribbon-like rubber 5 (vertical direction indicated by arrows in the drawing). The displacing means 36 and 37 are arranged so that the displacing direction of the cutting means 31 by the displacing means 37 is substantially parallel to the extrusion direction of the ribbon-like rubber 5 (left and right direction indicated by arrows in the figure). The moving means 35 moves (displaces) the cutting means 31 between the position contacting the opening surface 13A of the base 13 and the position spaced apart by a predetermined distance by the second displacement means 37. By the displacing means 36, the cutting means 31 is moved between a position where the tip of the cutting blade 31A does not contact the ribbon-like rubber 5 and a predetermined position where the opening of the base 13 can be completely traversed to the other end side.

  In addition to the above, the tire manufacturing apparatus 1 includes a stitching roller (not shown) that presses and stitches the ribbon-like rubber 5 attached to the rigid core 2 (see FIG. 1), and a rubber molding apparatus 10. And other known means included in a normal tire manufacturing apparatus, such as a means (not shown) for moving the sticking means 20 and the like along the outer surface of the rigid core 2. Further, the tire manufacturing apparatus 1 includes various sensors (not shown) such as a rotation or movement position detecting unit in each part of the apparatus, and each of these parts and sensors are connected to the control device 40, respectively.

  The control device 40, for example, performs arithmetic processing means 42 such as a microprocessor (MPU) that performs various data processing, analysis, arithmetic, etc., ROM storing various programs, temporary data storage for processing, etc. The microcomputer 41 includes a storage unit 43 such as a RAM to be performed, and an interface 44 for connection with an external device. The control device 40 is connected to the above-described parts and sensors such as the rubber molding device 10 and the cutting device 30 via the interface 44, and drives / requires for molding green tires and the like between the connected parts. Various data such as a stop command are transmitted and received, and the entire apparatus including the above-described automatic cutting of the ribbon-like rubber 5 is controlled.

  Next, the green tire molding procedure such as the lamination of the ribbon-like rubber 5 and the formation of the rubber member by the tire manufacturing apparatus 1 described above will be described. The following procedures are executed by the control device 40 according to a predetermined program. Or based on preset conditions or the like, each unit of the apparatus is operated in conjunction with each other, for example, each connected unit is operated at a predetermined timing.

  When a green tire is molded by the tire manufacturing apparatus 1 (see FIG. 1), first, a raw rubber is kneaded by the rubber molding apparatus 10 and extruded from the opening of the base 13 to form a ribbon-shaped rubber 5 having a predetermined cross-sectional shape. And is fed toward the space between the pair of rollers 21 and 22 that rotate in the opposite directions of the sticking means 20. Subsequently, the ribbon-like rubber 5 is rolled between the rollers 21 and 22 of the sticking means 20 so as to have a predetermined cross-sectional shape, and then the ribbon-like rubber 5 is held on the outer peripheral surface of the rotating lower roller 21 to be a rigid body. Guide to a predetermined affixing position on the core 2 and press the ribbon-like rubber 5 against the outer surface of the rotating rigid core 2. In this way, the ribbon-shaped rubber 5 is bonded to the outer surface of the rigid core 2 by pressure bonding, and is peeled off from the outer peripheral surface of the lower roller 21 and continuously bonded to a predetermined position. It presses and stitches on the outer peripheral surface of a roller (not shown), and the ribbon-like rubbers 5, the ribbon-like rubber 5 and other tire constituent members wound around the inner peripheral side thereof are pressure-bonded.

  The ribbon-like rubber 5 is stuck and pressed continuously by moving the rubber molding device 10 and the sticking means 20 along the outer surface of the rigid core 2 in conjunction with each other. A part of the outer surface of the core 2 is spirally wound, and one or more layers are laminated to form a rubber member having a predetermined shape. Further, in the tire manufacturing apparatus 1, the formation of the ribbon-shaped rubber 5 by the rubber molding apparatus 10 is stopped at a predetermined timing in accordance with the completion of the formation of the rubber member, and the ribbon-shaped rubber 5 is removed from the cutting apparatus 30 on the base 13 side. Cutting is performed by the cutting means 31.

FIG. 3 is a main part perspective view schematically showing the cutting operation of the ribbon-like rubber 5 by the cutting device 30.
As shown in FIG. 3A, the cutting device 30 is configured so that, before cutting the ribbon-shaped rubber 5, the cutting means 31 is directed so that the cutting blade 31A faces the ribbon-shaped rubber 5 and at least partly (here, the cutting blade 31A of the cutting blade 31A). It is made to stand by with the front-end | tip part contacting the opening surface 13A of the nozzle | cap | die 13. FIG. From this state, when the molding of the ribbon rubber 5 is stopped, the cutting means 31 is moved by the moving means 35 (see FIG. 2) in accordance with the stop of the molding operation of the rubber molding apparatus 10.

  At the time of cutting, first, the cutting means 31 is moved by the moving means 35 (first displacement means 36) from the standby position before cutting (see FIG. 3A) toward the ribbon-like rubber 5, substantially parallel to the width direction thereof. And while maintaining the state in contact with the opening surface 13A (arrow S1 in FIG. 3A), the opening 13B of the base 13 is traversed from one end to the other while sliding the opening surface 13A. At the time of this crossing, the cutting means 31 is moved until at least the tip of the cutting blade 31A crosses the opening 13B, and the cutting blade 31A causes the ribbon-like rubber 5 to move in the width direction and the opening surface 13A of the base 13. (See FIG. 3B). Next, the cutting means 31 is moved (arrow S2 in FIG. 3B) by the moving means 35 (second displacement means 37) and immediately separated from the opening surface 13A by a predetermined distance (see FIG. 3C), and then cut. The means 31 is moved by the moving means 35 (first displacing means 36) in the direction opposite to that during the cutting (arrow S3 in FIG. 3C). Subsequently, the cutting means 31 is displaced to the opening surface 13A side (arrow S4 in FIG. 3C) by the moving means 35 (second displacement means 37) and moved to the original standby position (see FIG. 3A). In a state where at least a part is in contact with the opening surface 13 </ b> A, the process waits until the next ribbon-like rubber 5 is cut.

  The tire manufacturing apparatus 1 attaches the end portion on the rigid core 2 side of the ribbon-like rubber 5 cut in this way to the outer surface of the rigid core 2 by the attaching means 20, and thereby, for example, a tire configuration such as a tread or a sidewall A member is formed into a predetermined cross-sectional shape, and a green tire is molded by combining with other tire constituent members. Further, the tire manufacturing apparatus 1 removes the rigid core 2 and replaces it with a new one, and repeats the above procedures such as attaching the tip (cut end) of the ribbon-like rubber 5 to the rigid core 2 to form a rubber member. And green tires are continuously formed.

  As described above, in the tire manufacturing apparatus 1 (rubber molding apparatus 10) of the present embodiment, the ribbon rubber 5 is removed by the cutting device 30 when the molding of the ribbon rubber 5 is stopped when the formation of the rubber member is completed. Since it cuts automatically, the labor, labor, time, etc. for cutting can be reduced, and the productivity of the rubber member and the ribbon-like rubber 5 can be improved. Moreover, since the cutting of the ribbon-like rubber 5 is performed by sliding the cutting means 31 along the opening surface 13A of the base 13, the ribbon-like rubber 5 can be cut surely and cleanly, and always cut under the same conditions and conditions. Thus, variations in thickness, shape, quality, and the like can be reduced. For example, the cutting shape of the ribbon-like rubber 5 can be stably and uniformly maintained.

  As a result, the tip (cut end) of the ribbon-like rubber 5 can be smoothly and stably guided to a predetermined position of the rigid core 2, and the sticking position can always be maintained at a fixed position to improve the sticking accuracy. In addition, since the ribbon-like rubber 5 can be prevented from adhering to other parts of the tire manufacturing apparatus 1, the ribbon-like rubber 5 and the rubber member (green tire) can be manufactured smoothly and the tire manufacturing apparatus 1 can be automatically operated. Can be done. At the same time, since the position and shape of the laminated tip and end of the ribbon-like rubber 5 can be maintained constant, the uniformity of the shape of the rubber member and green tire after lamination can be improved, and the shape after production. Various performances such as tire performance and tire performance can be made uniform to improve quality.

  Therefore, according to the present embodiment, the ribbon-shaped rubber 5 molded by the rubber molding apparatus 10 can be easily and automatically cut, and the cutting shape can be made uniform, using the ribbon-shaped rubber 5 and the ribbon-shaped rubber 5. While improving the quality of the rubber member and green tire to be formed, their production can be facilitated. Further, in the rubber molding apparatus 10, since the ribbon-like rubber 5 can be cut without rotating the rigid core 2, the above-described emptying operation, or when only the trial production or manufacture of the ribbon-like rubber 5 is performed. Even when the rubber molding apparatus 10 is operated alone, the ribbon-like rubber 5 can be cut easily and efficiently without requiring manual labor.

  Here, in such a rubber molding apparatus 10, even when the extruder 11 or the like is stopped to stop the molding of the ribbon-like rubber 5, the extruder 11 and the subsequent approximately 11 seconds to 20 seconds. In general, the rubber continues to slowly come out from the opening of the base 13 due to the residual pressure in the gear pump 12. Meanwhile, in the case of normal rubber molding, the next operation can be performed by waiting for the extrusion of the ribbon-like rubber 5 by the residual pressure to stop and cutting. However, when the rubber member is continuously formed by laminating the ribbon-like rubber 5 as in the tire manufacturing apparatus 1 of the present embodiment, the cycle time of the entire system is affected. It is necessary to cut in as short a time as possible without waiting for the stop.

  Therefore, in the rubber molding apparatus 10 of the present embodiment, the ribbon rubber 5 is cut by the cutting device 30 (cutting means 31) at a predetermined timing before the ribbon rubber 5 is completely stopped. At this time, when the cutting means 31 after the cutting is returned to the standby position by sliding the opening surface 13A of the base 13 in the same manner as at the time of cutting, it is discharged from the opening of the base 13 by the residual pressure during that time. The rubber is sequentially rubbed against the opening surface 13A by the moving cutting means 31. Along with this, the shape of the cut end of the ribbon-like rubber 5 changes, the cut shape becomes non-uniform (uneven), and unnecessary rubber adheres to the cut end of the ribbon-like rubber 5 that will be the next laminated tip. However, as a result of being affixed to the rigid core 2, a problem arises in that the quality of the rubber member or the like deteriorates due to a deviation in the affixing position or a non-uniform shape. On the other hand, the cutting device 30 of the present embodiment contacts the cutting end of the ribbon-like rubber 5 by moving the cutting means 31 after cutting away from the opening surface 13A by the moving means 35 (second displacement means 37). Therefore, the above-described problem can be prevented from occurring with respect to the cut end of the ribbon-like rubber 5.

  Further, in the cutting device 30 of the rubber molding device 10, the cutting means 31 waits until cutting of the ribbon-like rubber 5 with at least a part (here, the vicinity of the cutting blade 31 </ b> A) in contact with the opening surface 13 </ b> A of the base 13. Therefore, the heat of the base 13 is transferred to the cutting means 31 through the opening surface 13A, and the temperature is maintained at the same level as the temperature of the opening surface 13A. As a result, the ribbon-like rubber 5 can be easily cut, the ribbon-like rubber 5 can be cut more cleanly by the cutting means 31, and the uniformity of the cut shape can be further improved.

  In the present embodiment, the cutting means 31 is moved substantially parallel to the width direction and the pushing direction of the ribbon-like rubber 5 by the moving means 35 including the two displacement means 36 and 37. For example, the ribbon-shaped rubber 5 may be moved in another direction such as a thickness direction or an oblique direction so that the ribbon-shaped rubber 5 is cut or moved to a standby position. Further, the cutting means 31 is displaced and moved in multiple directions by, for example, a displacement means having a multi-joint arm, or is rotated and displaced around a fulcrum near the opening surface 13A of the base 13 to cut and move the ribbon-like rubber 5. For example, it may be moved by one displacement means (movement means) or three or more displacement means.

  However, in the case where the moving means 35 is constituted by the displacement means 36 and 37 in two different directions as in the present embodiment, the cutting operation of the cutting means 31 and the like are reliably executed with a relatively simple structure. Since it is possible, it is more desirable that the moving means 35 be configured as such. Similarly, when cutting is performed by moving the cutting means 31 in the width direction of the ribbon-like rubber 5, the cutting resistance is reduced and the cutting is facilitated and the cutting surface is further cleaned. Is more desirable to move in that way.

  On the other hand, as to the shape, type, and the like of the cutting means 31, in addition to the above-described substantially rectangular (plate-shaped) cutter, other shapes that can cut the ribbon-like rubber 5, such as a substantially trapezoidal or triangular cutter, for example. And may be of a kind.

FIG. 4 is a side view schematically showing another example of such a cutting means. Here, three kinds of cutting means 50, 60, and 70 are shown.
As shown in FIG. 4A, the cutting means 50 is a cutter having a cutting blade 51 on one end side in the longitudinal direction (left and right direction in the figure) of the substantially plate-like member, and is formed by inclining the cutting blade 51 obliquely. The cutting performance of the ribbon-like rubber 5 is enhanced.

  As shown in FIG. 4B, the cutting means 60 has a cutting blade 61 that is not inclined at one end in the longitudinal direction of the substantially plate-like member, and a heating means 62 made of an electric heater or the like attached to the side surface. It has been. The cutting means 60 is maintained at a high temperature (for example, about 150 to 250 ° C.) by heating by the heating means 62, and thus, even the ribbon-like rubber 5 made of hardly cut rubber is melted and cut. Can do.

  As shown in FIG. 4C, the cutting means 70 is a wire cutter that cuts the ribbon-like rubber 5 with the wire 72, and a pair of protrusions that protrude in the same direction at both ends in the vertical direction of one end in the longitudinal direction. 71 is formed, and one wire 72 is bridged between the tips (projecting ends). In this cutting means 70, the wire 72 may be formed by a heating wire having a large electric resistance, and the ribbon-like rubber 5 may be melted by being energized and heated.

  As described above, the case where the ribbon-shaped rubber 5 is laminated to form the tire constituent member (rubber member) of the green tire has been described as an example. The tire constituent member includes the ribbon-shaped rubber 5 and the rigid core 2 or the molding drum. Alternatively, it may be formed by directly laminating on other tire components wound around them, or after the ribbon-like rubber 5 is laminated on the outer surface of a molding drum or the like to form a predetermined shape, from the molding drum You may remove and stick together on the outer surfaces, such as a tire structural member on the rigid core 2 or another shaping | molding drum. Therefore, on the outer surface of the support (the rigid core 2 and the molding drum) on which the ribbon-like rubber 5 is pasted and laminated, in addition to those outer surfaces, other already formed tire constituent members (tires in the middle of molding) Including the outer surface.

  Further, in the present embodiment, the tire manufacturing apparatus 1 that molds a green tire has been described as an example. However, the present invention is a rubber molding apparatus that molds the ribbon-shaped rubber 5 and a support that rotates the ribbon-shaped rubber 5. The present invention can also be applied to other rubber member manufacturing apparatuses (methods) that are wound and laminated while being attached to the outer surface of the body to form a rubber member having a predetermined shape. Therefore, in addition to the above-described rigid core 2 and molding drum, for example, a base tire in a corrected tire, another drum formed by laminating rubber members, or a drum is used as a support for attaching and laminating the ribbon-like rubber 5. Other rubber members (rubber members in the middle of formation), etc. formed in the above, are used when forming each rubber member, and include other supports on which the ribbon-like rubber 5 is wound. Further, the ribbon-like rubber 5 may be formed by molding in accordance with the formation of each rubber member, such as a substantially rectangular shape, a crescent shape, a triangle shape, a curved shape, etc. Therefore, the ribbon-like rubber is referred to in the present invention. In the case, it refers to a long rubber member regardless of its cross-sectional shape.

It is a side view which shows typically the principal part of the tire manufacturing apparatus of this embodiment. It is a top view which expands and shows the cutting device vicinity of this embodiment seen from the X direction of FIG. It is a principal part perspective view which shows typically the cutting operation of the ribbon-shaped rubber by the cutting device of this embodiment. It is a side view which shows typically the other example of the cutting | disconnection means of this embodiment. It is a side view which shows typically the schematic structure of the conventional tire manufacturing apparatus, and the formation procedure of a rubber member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tire manufacturing apparatus, 2 ... Rigid core, 5 ... Ribbon-like rubber, 10 ... Rubber molding apparatus, 11 ... Extruder, 12 ... Gear pump, 12A ... Gear, 12B ... gear, 13 ... cap, 13A ... opening surface, 13B ... opening, 20 ... sticking means, 21 ... lower roller, 22 ... upper roller, 30 ... -Cutting device, 31 ... cutting means, 31A ... cutting blade, 35 ... moving means, 36 ... first displacement means, 37 ... second displacement means, 40 ... control Device 41... Microcomputer 42. Arithmetic processing means 43. Storage means 44. Interface 50. Cutting means 51. Cutting blade 60. Cutting means 61 ... Cutting blade, 62 ... Heating means, 70 ... Cutting means, 71 ... Projection , 72 ... wire.

Claims (7)

A rubber molding apparatus that molds a ribbon-like rubber by extruding rubber from an opening of a base,
Cutting means for cutting the ribbon-like rubber across the opening while sliding on the opening surface provided with the opening of the base;
When the ribbon-shaped rubber molding is stopped, the cutting means is moved from the standby position before cutting the ribbon-shaped rubber to cut the ribbon-shaped rubber, and then the cutting means is separated from the opening surface to the standby position. Moving means of cutting means for moving to,
A rubber molding apparatus comprising: In the rubber molding apparatus according to claim 1,
The moving means includes: a first displacing means for displacing the cutting means in a direction crossing the opening; and a second displacing means for displacing the cutting means in a direction contacting and separating from the opening surface. A rubber molding apparatus characterized by comprising: In the rubber molding apparatus according to claim 1 or 2,
The moving means moves the cutting means in the width direction of the ribbon-like rubber while sliding the opening face, traverses the opening, and cuts the ribbon-like rubber in the width direction. Rubber molding equipment. The rubber molding apparatus according to any one of claims 1 to 3,
The moving means moves the cutting means to the standby position, and waits until the ribbon rubber is cut while at least a part of the cutting means is in contact with the opening surface. In the rubber molding device according to any one of claims 1 to 4,
A rubber molding apparatus comprising heating means for heating the cutting means. A rubber member manufacturing apparatus for manufacturing a rubber member by laminating ribbon-like rubber,
A rubber molding apparatus according to any one of claims 1 to 5, wherein the ribbon-shaped rubber is molded.
A rotatable support for winding the ribbon-shaped rubber around an outer surface;
The ribbon-like rubber that is molded by the rubber molding device is laminated on the outer surface of the support, and the ribbon-like rubber pasting means for forming the rubber member;
An apparatus for producing a rubber member, comprising: A rubber member manufacturing method for manufacturing a rubber member by extruding rubber from an opening of a base of a rubber molding device to form a ribbon-like rubber and laminating the ribbon-like rubber on an outer surface of a rotating support,
Molding the ribbon-like rubber with the rubber molding device;
Winding the formed ribbon-like rubber around the outer surface of the support and laminating to form the rubber member;
A step of stopping the formation of the ribbon-shaped rubber by the rubber molding device in accordance with the completion of the formation of the rubber member, and cutting the ribbon-shaped rubber by a cutting means,
The cutting step includes moving the cutting means from a standby position before cutting the ribbon-shaped rubber toward the ribbon-shaped rubber, and sliding the opening portion provided with the opening portion of the base. A step of cutting the ribbon-shaped rubber by traversing the ribbon-shaped rubber, and a step of moving the cutting means for cutting the ribbon-shaped rubber away from the opening surface to the standby position. Production method.

Images