JP6503824B2 - Container for tire vulcanization - Google Patents

Description

  The present invention relates to a container for tire vulcanization, and more specifically, wear or deformation of a segment or the like which is attached to the outer peripheral surface of a sector mold and slides between a lift plate and a bottom plate The present invention relates to a tire vulcanizing container that can be reduced.

  The sectional type tire mold has a plurality of sector molds assembled in an annular shape, and an annular pair of upper and lower side molds. The tire vulcanization container in which the tire mold is installed includes a segment attached to the outer peripheral surface of each sector mold, a lift plate attached with the upper side mold, a bottom plate attached with the lower side mold, and It is equipped with a moving container ring. The outer peripheral inclined surface of the segment and the inner peripheral inclined surface of the container ring are slidably engaged, and the vertical movement of the container ring causes the segment to slide and move between the elevating plate and the bottom plate, The closed mold and open mold of the sector mold are performed (see, for example, Patent Document 1).

  Each segment is strongly pressed by the lift plate and is in a state of being sandwiched between the top and bottom of the lift plate and the bottom plate, so that the wear becomes remarkable by repeated sliding movement. As the pressing force by the lift plate increases, the amount of wear of the segment increases and deformation also easily occurs. Also, if this pressing force is biased and acts on the segment, uneven wear occurs on the segment. When the segment wears or deforms in this manner, the closed tire mold is dislocated, which causes a problem of generation of a step or burr on the vulcanized tire. In addition, sliding members such as the metal plate on the lower surface of the lift plate and the upper surface of the bottom plate and the metal plate on the inner peripheral surface of the container ring cause wear and deformation over time, which causes the same problem.

Unexamined-Japanese-Patent No. 11-201041

  The object of the present invention is for tire vulcanization that can be attached to the outer peripheral surface of a sector mold, and can reduce wear and deformation of segments etc. that slide and move in a state of being sandwiched between the elevating plate and the bottom plate To provide a container.

  In order to achieve the above object, the container for tire vulcanization of the present invention comprises a segment attached to the outer peripheral surface of each of a plurality of sector molds arranged annularly, a lift plate to which an upper side mold is attached, and a lower side mold And a vertically movable container ring, wherein the outer peripheral inclined surface of the segment and the inner peripheral inclined surface of the container ring are slidably engaged, and the space between the upper and lower plates and the lower plate is provided. With the segments interposed therebetween, the segments are slid relative to the lift plate and the bottom plate by moving the container ring up and down to move back and forth relative to the annular center line of the plurality of sector molds. To make these sector molds close and open A column for maintaining a vertical distance between the lift plate and the bottom plate when the segment is sandwiched between the lift plate and the bottom plate in a vulcanizing container is the lift plate and the bottom plate. It is characterized in that it is provided in a projecting manner on at least one of the plates.

  According to the present invention, a pressing force that vertically compresses is applied to the segment held between the elevating plate and the bottom plate, but the columnar body also bears this pressing force. Therefore, compared with the conventional structure, the pressing force that the segment bears is reduced. Along with this, it becomes possible to reduce wear (including partial wear) and deformation of sliding members such as segments.

  Here, the columnar bodies may be arranged at equal intervals in the circumferential direction on the circumference centered on the annular center line of the sector mold. According to this configuration, the pressing force can be easily dispersed evenly to the respective columnar bodies.

  The columns may be disposed between adjacent ones in the circumferential direction of the segments. According to this configuration, it becomes easy to evenly reduce the pressing force that each segment bears.

When advancing and retracting the segments relative to the annular center line, the columnar body, the segment can also function as a guide member for guiding is brought into contact with the side surface of the columnar body. According to this configuration, the columnar body facilitates advancing and retracting the segment in a desired direction. Along with this, it becomes advantageous to move back and forth smoothly by minimizing interference between circumferentially adjacent segments.

  The columnar body may be provided so as to protrude from the elevating plate, and a fitting portion in which the lower end portion of the columnar body is fitted may be provided on the upper surface of the bottom plate. According to this configuration, the relative position between the elevating plate and the bottom plate is fixed by fitting the lower end portion of the columnar body to the fitting portion, so that each sector mold can be accurately positioned at the predetermined position. it can.

It is a left half longitudinal cross-sectional view which illustrates the container for tire vulcanization of the present invention in an open type. It is a top view which illustrates the sector mold of FIG. 1, a segment, and a columnar body. The left half longitudinal cross-sectional view which illustrates the container for tire vulcanization of FIG. 1 of a closed type | mold state. It is a top view which illustrates the sector mold of FIG. 3, a segment, and a columnar body. It is a left half longitudinal cross-sectional view which illustrates another embodiment of the container for tire vulcanization (closed type state). It is a left half longitudinal cross-sectional view which illustrates another embodiment of the container for tire vulcanization (closed type state).

  Hereinafter, a tire vulcanizing container of the present invention will be described based on an embodiment shown in the drawings.

  As illustrated in FIG. 1 and FIG. 2, a sectional-type tire mold is installed in the tire vulcanizing container 1 of the present invention (hereinafter referred to as the container 1). This tire mold includes a plurality of (for example, eight or so) sector molds 11 arranged in an annular shape to form a tire tread, and an annular upper side mold 12a and a lower side mold 12b for forming a tire sidewall. . An alternate long and short dash line CL in the drawing indicates an annular center line of the sector mold 11 disposed in an annular shape. A green tire is disposed in the tire mold.

  The container 1 is installed in a vulcanizer and a central mechanism 8 is disposed inside. The upper edge and the lower edge of the cylindrical vulcanizing bladder 9 are held in the central mechanism 8 by the holding plates 10 mounted at intervals in the vertical direction.

  The container 1 includes a segment 3 attached to the outer peripheral surface of each sector mold 11, a lift plate 4 to which the upper side mold 12a is attached, a bottom plate 5 to which the lower side mold 12b is attached, and a container ring 2 which moves up and down. And have. The lift plate 4 and the container ring 2 move up and down independently and independently by a hydraulic cylinder or the like. The outer peripheral surface of the segment 3 and the inner peripheral surface of the container ring 2 are inclined downwardly and outwardly.

  The segment 3 is suspended from the elevating plate 4 so as to be slidable in the horizontal direction. The outer peripheral inclined surface of the segment 3 and the inner peripheral inclined surface of the container ring 2 are slidably engaged, and the vertical movement of the container ring 2 causes the segment 3 to slide in the horizontal direction. If it explains in full detail, the metal plate used as inner skin slope of container ring 2, and the outer skin slope of segment 3 will slide.

  Columnar bodies 6 are provided on the lift plate 4 so as to protrude downward toward the bottom plate 5. The number of columnar bodies 6 is plural, and in this embodiment, they are arranged between circumferentially adjacent ones of the plurality of annularly arranged segments 3. That is, the columnar body 6 is disposed in the circumferential gap of the open-type segment 3.

  The number, arrangement, cross-sectional shape and the like of the columns 6 are appropriately determined. The columnar members 6 in this embodiment have substantially the same specifications in all, and have a substantially triangular (or trapezoidal) cross-sectional shape, and have a shape pointed at the annular center line CL side. On the upper surface of the bottom plate 5 is provided a fitting portion 7 with which the lower end portion of the columnar body 6 is fitted.

  When the lower end portion of the columnar body 6 is fitted in the fitting portion 7, the lift plate 4 can not approach the bottom plate 5, and the vertical distance between the lift plate 4 and the bottom plate 5 is maintained and fixed. Thus, in the state where the vertical distance between the lift plate 4 and the bottom plate 5 is maintained, the upper surface and the lower surface of the segment 3 respectively abut the metal plate of the lower surface of the lift plate 4 and the metal plate of the upper surface of the bottom plate 5. Thus, the segment 3 is sandwiched between the upper and lower sides of the lift plate 4 and the bottom plate 5.

  The segment 3 in a state of being sandwiched between the upper and lower sides of the lift plate 4 and the bottom plate 5 slides against the metal plate of the lift plate 4 and the metal plate of the bottom plate 5 by the up and down movement of the container ring 2 Move to and from line CL. The forward movement of the segments 3 with respect to the annular center line CL causes the sector mold 11 to be assembled in an annular shape and closed, and the backward movement causes the sector mold 11 to be opened. The closed sector mold 11 and the upper side mold 12a and the lower side mold 12b are assembled to clamp the tire mold.

  The green tire is pressed from the inside by a vulcanizing bladder 9 expanded in a clamped tire mold and vulcanized under a predetermined temperature and a predetermined pressure for a predetermined time. Thereafter, the tire mold is opened and the vulcanized tire is taken out.

  Hereinafter, the process of clamping the open mold tire mold will be described.

  When the green tire is vulcanized, the green tire is set horizontally on the lower side mold 12b. Then, the elevating plate 4 is moved downward to fit the lower end portion of the columnar body 6 to the fitting portion 7 as illustrated in FIG. 1 to maintain the vertical distance between the elevating plate 4 and the bottom plate 5 3 is held between the upper and lower sides of the lift plate 4 and the bottom plate 5. At this time, the sector mold 11 is in an open state as illustrated in FIG.

  Then, the container ring 2 is further moved downward as illustrated in FIG. 3 to move the segment 3 forward with respect to the annular center line CL, and the sector mold 11 is assembled in an annular shape and closed. At this time, the segment 3 slides on the metal plate of the lift plate 4 and the metal plate of the bottom plate 5. Thus, the sector mold 11 is closed as illustrated in FIG. The upper side mold 12a and the lower side mold 12b are assembled to the closed sector mold 11 and the tire mold is clamped.

  A pressing force acts on the segments 3 in a state of being sandwiched between the upper and lower sides of the lift plate 4 and the bottom plate 5 so as to be compressed in the vertical direction. In the present invention, the columnar body 6 also bears this pressing force. That is, in the conventional structure in which the columnar body 6 was not present, only the segment 3 bears this pressing force, but in the present invention, the pressing force applied to the segment 3 by the columnar body 6 is reduced. Along with this, it becomes possible to reduce the wear and deformation of the sliding segment 3. Therefore, it is difficult to cause a displacement due to the wear and deformation of the segments 3 in the clamped tire mold, and it is possible to obtain a tire of excellent quality free of the steps and burrs due to the displacement of the tire mold.

  Such wear and deformation is caused by the opening and closing of the mold 10, such as the metal plate on the inner peripheral surface of the container ring 2 as well as the segment 3, the metal plate on the lower surface of the lift plate 4 and the metal plate on the upper surface of the bottom plate 5. It also occurs on sliding members. According to the present invention, wear and deformation of these sliding members can also be suppressed.

  In this embodiment, since the pillars 6 are disposed between adjacent ones of the segments 3 in the circumferential direction, it is easy to evenly reduce the pressing force that each segment 3 bears. Therefore, it is also advantageous to prevent uneven wear of the segment 3.

  The columnar bodies 6 can also be arranged at equal intervals in the circumferential direction on the circumference centered on the annular center line CL. This arrangement facilitates uniform distribution of the pressing force acting on the columns 6.

  In this embodiment, the side surface of the segment 3 moves in contact with the side surface of the columnar body 6 when moving the segment 3 back and forth with respect to the annular center line CL. Therefore, the columnar body 6 can function as a guide when the segment 3 moves back and forth with respect to the annular center line CL by appropriately setting the direction of the plan view of the side surface of the columnar body 6. Having the columnar body 6 function as a guide in this manner is advantageous for smoothly advancing and retreating with minimal interference between circumferentially adjacent segments 3.

  Since the relative position between the lift plate 4 and the bottom plate 5 is fixed by fitting the lower end portion of the columnar body 6 to the fitting portion 7, each sector mold 11 can be accurately positioned at a predetermined position. . Thereby, it is advantageous to close the sector mold 11 accurately without deviation. Further, the upper bead and the lower bead of the green tire are respectively held by the upper side mold 12a and the lower side mold 12b positioned with high accuracy. Therefore, it is advantageous to improve the uniformity of the vulcanized tire.

  By projecting all the columns 6 to the lift plate 4 as in this embodiment, the bottom plate 5 is free of excess protrusions, so that it is possible to avoid an increase in obstacles such as when transporting an object. . Therefore, the workability and the like are not deteriorated.

  In the embodiment illustrated in FIG. 5, all the columns 6 project upward from the bottom plate 5 toward the lift plate 4. A fitting portion 7 is provided on the lower surface of the lift plate 4 to which the upper end portion of the columnar body 6 fits. The other configuration is the same as that of the embodiment illustrated in FIGS. 1 to 4. For example, when it is difficult to project the pillars 6 on the elevating plate 4 because the weight of the elevating plate 4 can not be increased, the pillars 6 may be protruded on the bottom plate 5 as in this embodiment. Good.

  In the embodiment illustrated in FIG. 6, the pillars 6 a are protruded downward from the lift plate 4 toward the bottom plate 5, and the pillars 6 b are protruded upward from the bottom plate 5 toward the lift plate 4. ing. The lower end portion of the columnar body 6 a protruding from the lift plate 4 and the upper end portion of the columnar body 6 b protruding from the bottom plate 5 are fitted in the fitting portion 7. The fitting portion 7 can be provided at either the lower end portion of the columnar body 6 a or the upper end portion of the columnar body 6 b. The other configuration is the same as that of the embodiment illustrated in FIGS. 1 to 4.

  In this embodiment, the projecting lengths of the columns 6a and 6b from the plates 4 and 5 can be shortened. Further, the increase in weight of the lift plate 4 can be suppressed to a certain extent.

  The pillars 6 illustrated in FIG. 1 protruding from the elevating plate 4 and the pillars 6 illustrated in FIG. 4 protruding from the bottom plate 5 may be provided in combination. For example, the pillars 6 protruding from the lift plate 4 and the pillars 6 protruding from the bottom plate 5 are alternately arranged in the circumferential direction.

DESCRIPTION OF SYMBOLS 1 Tire vulcanizing container 2 Container ring 3 Segment 4 Lifting plate 5 Bottom plate 6, 6a, 6b Column 7 Fitting portion 8 Central mechanism 9 Vulcanizing bladder 10 Holding plate 11 Sector mold 12a Upper side mold 12b Lower side Mold CL Sector mold ring centerline

Claims (5)

The segment attached to the outer peripheral surface of each of the plurality of sector molds arranged annularly, a lift plate to which the upper side mold is attached, a bottom plate to which the lower side mold is attached, and a vertically moving container ring An outer peripheral inclined surface of the segment and an inner peripheral inclined surface of the container ring are slidably engaged to sandwich the segment between the elevating plate and the bottom plate, and the container ring moves up and down By sliding the segment relative to the lift plate and the bottom plate to move back and forth with respect to the annular center line of each of the plurality of sector molds, thereby closing and opening the sector mold. In the container for
A pillar that maintains the vertical distance between the lift plate and the bottom plate when the segment is sandwiched between the lift plate and the bottom plate is at least one of the lift plate and the bottom plate. A tire vulcanizing container characterized by being protrusively provided.   The tire vulcanizing container according to claim 1, wherein the columnar bodies are arranged at equal intervals in a circumferential direction on a circumference centered on an annular center line of the sector mold.   The tire vulcanizing container according to claim 1 or 2, wherein the pillars are disposed between circumferentially adjacent ones of the segments. The tire vulcanization according to claim 3, wherein the columnar body functions as a guide member for guiding the segment into contact with the side surface of the columnar body when moving the segment back and forth with respect to the annular center line. Container.   The tire according to any one of claims 1 to 4, wherein the columnar body is provided so as to protrude from the elevating plate, and a fitting portion in which a lower end portion of the columnar body is fitted is provided on an upper surface of the bottom plate. Container for vulcanization.

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