JPH0432258Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a tire vulcanizer, and improves the mounting structure of the lower steam box in a steam box enclosing a green tire vulcanization mold. This invention relates to a device that prevents thermal strain deformation during vulcanization molding, eliminates thermal energy loss, and allows easy correction of misalignment with respect to an upper steam box.

(Prior art) In a tire vulcanizer, the steam box consists of a fixed lower steam box in which a lower mold is installed, and an upper steam box that is openable and closably connected to the box and houses an upper mold. It is known to seal and isolate a green tire from the outside world during vulcanization and pressure molding to maintain heat retention in the thermal environment. Conventionally, the structure shown in FIGS. 2 and 3 has been common. That is, what is shown in both figures shows an example of a tilt-back type tire vulcanizer in which the upper die rotates to open and close relative to the lower die.
The approximately dome-shaped top of the upper steam box 24 is fixedly held on the top link 21 by a mounting bolt 34 via a threaded cylinder 33 which is a component of a mold height adjustment device 32. A double screw nut 35 having a thread on its circumferential surface is screwed into the nut 35 via an inner circumferential thread so as to be rotatable up and down, and further attached to the bolster plate 3 via an outer circumferential thread of the same nut 35.
6 is screwed in such a way that it can be vertically raised and lowered, and an upper die 28 is attached to this bolster plate 36, and the top link 21 is attached to a side wall 30 of the vulcanizer base frame 22 by a rotating device 3 such as a crank gear.
1, the lower mold 29 placed on the lower steam box 25 fixedly installed on the base frame 22 is connected and held by the side link 23 rotatably provided by the lower mold 29 via the guide groove 37. As shown in FIG. 3, it is rotated to open and close, and when closed, the upper mold 28 is closed to the lower mold 29, and the upper steam box 24 is joined to the lower steam box 25. The fixed mounting structure of the lower steam box 25 to the base frame 22 is as shown in FIG.
2, the bottom part 25a of the lower steam box 25 is placed on top of the heat insulating material 26, and the fastening bolts 27 are connected from the platen or support 38 side located on the top surface of the bottom part 25 to the base frame 22. The lower die 29 is installed on the platen or the support 38. Although the chilled bag type tire vulcanizer shown in FIG. 3 has been described, there are known tire vulcanizers in which an upper die vertically moves up and down to open and close the lower die. In this vertical lift type vulcanizer, the upper and lower steam boxes 24, 25
The steam box itself is exactly the same, and the mounting structure of the lower steam box 25 to the base frame 22 is exactly the same as that shown in the second figure.

(Problems to be Solved by the Invention) The following problems occur in the mounting structure of the lower steam box 25 in the steam box described above. As is known, in a tire vulcanizer,
For chilled bag type, side link 2
3, a clamping force is generated by the mold clamping mechanism (pressure cylinder) in the case of the vertical lift opening/closing type, and after closing, the lower molds 28 and 29 are firmly clamped. When the tightening force is applied to both the upper and lower molds, the base frame 22 and the top link 21 are bent as shown by chain lines a and b in FIG. Usually its thickness is about 10mm)
26 to the lower steam box 25, which is fixed together with the fastening bolts 27, and the bottom portion 25a of the lower steam box 25 bends and deforms together with the base frame 22. Since the bottom part 25a also serves as a support for the lower mold 29, such deformation not only impairs the uniformity of the clamping force distribution and causes the disadvantage that it is strong on both sides of the lower mold and weak in the center, but also causes damage to the inside of the steam box. Thermal energy is transferred to the base frame 2 through the thin insulation material 26.
It is easy to escape downwards, and the insulation material itself can bend or break. Furthermore, since the lower steam box 25 is directly fixed to the base frame 22, there is also the disadvantage that if it becomes misaligned with respect to the center of the upper mold 28, it must be dismantled and it is difficult to correct it.

(Means for Solving the Problems) In order to solve the above problems, the present invention improves the mounting structure of the lower steam box 25 to the base frame 22 in such a steam box, so that the bending deformation of the base frame is reduced. It is designed to prevent heat loss from affecting the steambox, and also to make it easy to correct and adjust misalignment with respect to the upper mold.Specifically, it has a built-in lower mold and a base frame In a tire vulcanizer equipped with a steam box consisting of a lower steam box fixed to the top, and an upper steam box containing an upper mold and connected to the lower steam box so as to be openable and closable, the base is mounted on the base frame. A support plate is fixed by a mounting belt passing through the frame, and the bottom of the lower steambox is fixed to the support plate so as to be adjustable in the front, back, left and right by means of a mounting bolt that stays on the support plate, and A high-rigidity heat insulating material is interposed between the thick plate and the base frame, and a push bolt device is provided between the support plate and the lower steam box for adjusting the position of the lower steam box in the front, rear, left and right directions. be.

(Function) According to the technical means of the present invention, as shown in FIG. 1, in a steam box consisting of an upper steam box 1 and a lower steam box 2, the base frame 9 A support plate 4 is placed on the upper surface of the plate in an overlapping manner with a heat insulating material 5 interposed therebetween, and the plate 4 is
is fixed by a tightening bolt 8 that passes through the heat insulating material 5 and is fastened to the base frame 9, and the bottom part (bottom plate) 3 of the lower steam box 2 is superimposed on the upper surface of this support plate 4, and the bottom part 3 is fastened and fixed to the support thick plate 4 by another fastening bolt 6 that penetrates the thick plate 4 and stops, and furthermore, the support thick plate 4
Between the bottom surface of the base frame 9 and the top surface of the base frame 9, a high-rigidity heat insulating material 5a separate from the heat insulating material 5 is interposed and supported in a partially arranged manner, and a portion of the circumferential side of the thick plate 4 and a corresponding lower part thereof are interposed and supported in a partially arranged manner. By providing the push bolt device 7 between the steam box 2 and a portion of the circumferential wall 2a, the following effects can be obtained.

The lower steam box 2 is not directly attached to and integrated with the base frame 9, but is superimposed on the support plate 4 directly fixed to the frame 9 via the heat insulating material 5 on the base frame 9, and the same plate. 4, the lower steam box 2 is isolated from the base frame 9 by the support plate 4, and due to the thickness of the plate 4 and its accompanying high rigidity, mold clamping is prevented. The deflection of the base frame 9 that occurs during installation will not affect the lower steam box 2 at all. Therefore, the lower mold mounted on the box 2 via the lower platen or the support 11 does not bend or bend, and the clamping force is strong on both sides of the mold and weak in the center. No uniformity occurs either. Furthermore, between the support plate 4 that supports the lower steam box 2 and the base frame 9, a high-rigidity heat insulating material 5a, which is different from the normal heat insulating material 5, is brought into contact with the support plate 4, so that the isolation effect from the above-mentioned deflection is achieved. It assists and strengthens well. Further, since a push bolt device 7 is provided between a part of the circumference of the support thick plate 4 and the circumference side wall 2a of the lower steam box 2, the fastening bolt 6 can be loosened, and the push bolt 12 can be adjusted and fixed. This makes it easy to correct misalignment and adjust the position of the lower mold with respect to the upper mold by moving the position of the lower mold back and forth, left and right, and it is possible to completely concentrically close both the upper and lower molds.

(Embodiment) A suitable embodiment of the present invention is illustrated in FIG. The shape of the base frame 9 is arbitrary except that the installation surface of the lower steam box 2 is made flat, and it is possible to adopt the shape of various conventional vulcanizers. The heat insulating material 5 laid on the upper surface of the installation position is formed of a conventionally used heat insulating material such as glass wool. and has a height that completely covers the peripheral side wall 2a of the lower steam box 2. The support thick plate 4 is a disk-shaped and thick plate body, and when it is attached to the base frame 9 using the fastening bolts 8, in the embodiment, the fastening bolts 8 are installed at about 4 to 8 equally spaced positions in the circumferential direction. At this time, the high-rigidity heat insulating material 5a (small disk shape) is fitted into the heat insulating material 5 at the position where the bolts 8 are fastened, and is commonly fixed to the base frame 9 side by the bolts 8. In some cases, it may be formed into a ring-like shape that goes around the entire circumference. Support plank 4 for lower steambox 2
In the embodiment, when the fastening bolt 6 is used to secure the box 2 to the box 2, a mounting convex portion 13 protruding from the support thick plate 4 side through the bottom 3 of the box 2 is used.
A bolt 6 is screwed into the convex portion 13 in a depressed-head shape and fastened to the thick plate 4 side. Lower mold 2 provided on bottom part 3
The mounting platen 9 or support 11 is the same as the conventional one. The support 11, the bottom 3, the support plate 4, the heat insulating material 5, and the base frame 9 are each provided with a hole at a central position to enable attachment of a central mechanism and elevation (not shown). A push bolt device 7 provided on a peripheral part of the support thick plate 4 and a corresponding part of the peripheral wall 2a of the box 2 is inserted into the box 2 from a peripheral part of the support thick plate 4 as shown in the figure. A bracket 14 extending toward the circumferential wall 2a and a push bolt 12 mounted on the bracket 14 via an adjusting and fixing nut or the like are pressed so as to be movable forward and backward toward the circumferential wall 2a. The upper steam box 1 corresponding to the lower steam box 2 may be similar to the conventional upper steam box 24 shown in FIG. Both indicate the same member. In the embodiment, the entire outer surface of the upper steam box 1 is covered with a heat insulating material 10 similar to the heat insulating material 5, and 15 indicates the joint edges of the upper and lower steam boxes 1 and 2 and the heat insulating materials 5 and 10. 16 indicates the operation port of the push bolt device 7. In this case, if the bolster plate 36 in the upper steam box 1 is made of a highly rigid and thick material as in the embodiment, the effect of bending on the top link 21 side can be blocked by the bolster plate 36, and the support thickness can be reduced. The same effect as board 4 can be expected. The one shown in Fig. 3 is a chilled back type vulcanizer and a twin type in which two vulcanizing molds are installed side by side on the same base frame. It can be applied to a single type with one mold, and the situation is the same in a vertically lifting/lowering opening/closing type, only that the side links are replaced with side frames and the top links are replaced with top frames.

(Effects of the invention) According to the invention, common problems in steam boxes used in various tire vulcanizers are solved, troubles caused by bending and deformation of the lower steam box due to bending of the base frame are solved,
Eliminates uneven distribution of clamping force on the lower mold when clamping the mold, and also eliminates loss of thermal energy in the steam box to the base frame side.
It ensures stable retention of the lower mold, easily corrects misalignment of the lower mold with respect to the upper mold, maintains uniform alignment of the upper and lower molds, and can be expected to improve the quality of vulcanization molding. It is further advantageous in that these effects can be reliably obtained with the simple necessary structure of intervening the support plate 4, fixing the lower steam box bottom 3 to the support plate 4, and adding the push bolt device 7. be.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of an example of a conventional steam box structure, and Fig. 3 a and b are schematic illustrations of an example of a chilled bag type tire vulcanizer. They are a front view and a side view. DESCRIPTION OF SYMBOLS 1... Upper steam box, 2... Lower steam box, 3... Lower steam box bottom, 4... Support plank, 5... Insulating material, 5a...
...High rigidity insulation material, 6...Box fastening bolt, 7
... Push bolt device, 8 ... Support thick plate fastening bolt, 9 ... Base frame.

Claims (1)

[Scope of utility model registration request] The steam box comprises a lower steam box 2 which has a built-in lower mold 29 and is fixed on a base frame 9, and an upper steam box 1 which has a built-in upper mold 28 and is joined to the lower steam box 2 so as to be openable and closable. In the tire vulcanizer,
The support plank 4 is fixed onto the base frame 9 by means of mounting bolts 8 penetrating through the base frame 9, and the support plank 4 is fixed onto the support plank 4.
The bottom of the lower steam box 2 is fixed so as to be adjustable in the front, rear, left and right directions using the mounting bolts 6 that remain in place.
A high-rigidity heat insulating material 5a is interposed between the support thick plate 4 and the base frame 9, and between the support thick plate 4 and the lower steam box 2, the position of the lower steam box 2 can be adjusted in the front, rear, right and left directions. A tire vulcanizer characterized by being provided with a push bolt device 7.