JPH0655372B2 - Mold clamping device for tire vulcanizer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device for a tire vulcanizer which clamps and fixes upper and lower molds to a platen, respectively.

[0002]

2. Description of the Related Art Generally, the main part of a tire vulcanizer is shown in FIG.
Are known. In FIG. 6, reference numeral 61 is an upper mold, and 62 is a lower mold, which are fixed to an upper platen 63 and a lower platen 64 for heating, respectively. The platen 63, 64 has a mold height adjusting mechanism 65, respectively. The mechanism 66 is connected and the shield domes 67 and 68 are attached. The lower platen 64 is mounted and supported on the main body frame via a fastening member such as a bolt or a fastening cylinder (not shown). The upper platen 63 is fixed to the support plate 69 with bolts 70, and the upper die 61 is fastened to the upper platen 63 and the support plate 69 together with the bolts 71, so that the upper platen 63 and the support plate 69 have bolt holes.
A plurality of 72 and 73 are arranged in the radial direction so that they can correspond to the size of the upper die 61.

Further, the lower mold 62 is fixed to the lower platen 64 by the bolts 74. As described above, the size of the mold varies depending on the tire size. Stopping is performed using a nut 76 slidably fitted in a T groove (existing groove) 75 extending in the radial direction as shown in FIG. 7, so that it can be adapted to each die size.

A positioning projection 80 is provided on the inner surface of each platen 64 near the central mechanism 66, and the projection 80 is fitted into a positioning hole 82 provided in the lower mold 62.

[0005]

In the above-mentioned conventional example, when exchanging the mold corresponding to the tire size, it is necessary to loosen or tighten a plurality of bolts each time the tire is replaced, which is considerably large. However, there was a problem that the workability was poor. The present invention has been made in view of the above situation, and an object thereof is to eliminate the work such as fastening bolts each time the mold is replaced, and to automatically move the upper and lower molds to the upper and lower platens. To provide a mold clamping device for a tire vulcanizer which can be clamped and unclamped.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is a tire vulcanizer in which a lower platen supporting a lower mold is attached to a body frame, and an upper platen supporting an upper mold is provided so as to be vertically movable. Tighten to each platen via a locking plate having a locking portion at the outer peripheral end attached to the platen and a locking cylinder that is detachable from the locking plate and provided on the outer peripheral side of each platen. The feature is that it is fixed.

Further, the present invention is characterized in that each of the locking cylinders is moved up and down with respect to each platen by a driving means to tighten and fix the locking plate.

[0008]

According to the present invention, locking plates of the same shape and size are attached to the upper and lower molds adapted to the respective tire sizes, so that the locking plates are brought into contact with each platen and positioned, and then locked. The cylinder is slightly rotated to engage with the locking portion of the locking plate, and the locking cylinder is pushed upward or downward by the driving means, and the locking cylinder causes the upper and lower molds via the locking plate. Can be clamped and fixed to the upper and lower platens. In addition, when removing the upper and lower molds from the upper and lower platens, after releasing the tightening fixation by the driving means, the locking cylinder is slightly rotated to release the engagement with the locking plate, and The upper and lower molds can be easily removed, and the mold clamping and unclamping operations can be automated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention in which the central mechanism of the vulcanizer is omitted, 1 is a main frame of the vulcanizer, 2 is an upper mold, 3 is a lower mold, 4 is an upper mold 2 Upper positioning and locking plate mounted on the upper surface of the lower mold, 5 lower positioning and locking plate mounted on the lower surface of the lower mold 3, 6 upper platen supporting the upper mold 2, and 7 supporting the lower mold 3. Lower platen, 8 is an upper positioning member and locking cylinder that is fitted on the outer circumference of the upper platen 6, 9 is a lower positioning member and locking cylinder that is fitted on the outer circumference of the lower platen, and 10 and 11 are upper and lower clamps. Dome, 12,13
Is the upper and lower shield dome.

The upper and lower positioning / locking plates 4 and 5 are annular plates of the same shape and size, and each of them has protrusion-like positioning locking portions 14 and 15 on the outer peripheral edge thereof at four positions at 90-degree intervals. (Fig. 2,
(See FIG. 3), both locking plates 4 and 5 are provided with stepped elongated holes 16 and 17 for mounting bolts extending outward in the radial direction at four positions at equal angles, and the elongated holes 16 and 17 are provided with a mold. The mounting bolts 18 and 19 are fitted and locked so as to be slidable in the radial direction, so that they can be used in common for various sizes of the upper and lower molds 2 and 3. The central holes 20 and 21 of the locking plates 4 and 5 are insertion holes of the central mechanism.

The upper and lower platens 6 and 7 have the same structure as the conventional product, but the outer diameters of the locking plates 4 and 5 are substantially the same, and the upper and lower die mounting surfaces 6A and 7A have the same conventional structure. The bolt holes as in the example are not provided, the locking plates 4 and 5 are concentrically abutted, and central mechanism mounting holes 22 and 23 are provided at the center. And, in the central part of the upper surface of the upper platen 6,
A lower end of an upper mold operating shaft 24 that penetrates the center of the upper clamp dome 10 so as to be vertically movable is connected. Further, the lower platen 7 is a tightening cylinder fixed by the tie rod 25 to the lower clamp dome 11 fixed on the main body frame 1.
It is supported so as to be vertically movable via 26 and its piston rod 27.

The upper positioning member / locking cylinder 8 includes:
An inward locking flange 28 is provided so as to project from the inner peripheral surface of the lower end, and the positioning locking portion 14 of the positioning / locking plate 4 is attached to the locking flange 28.
Corresponding to the above, positioning notches 29 are provided at four places, the locking plate 4 is fitted to the inner circumference of the locking collar 28, and the upper die 2 is also positioned for upper positioning with respect to the upper platen 6. The locking cylinder 8 is externally fitted to the outer periphery of the upper platen 6 so as to be positioned through the stop plate 4 by a predetermined angle θ through a bush 30 and can be vertically moved by a predetermined amount. ing. Then, the locking plate 4 is attached to the upper positioning member / locking cylinder 8
While matching the locking collar 28 and the positioning notch 29 of
When in contact with the lower surface 6A of the upper platen 6, the specified angle θ
By rotating the locking cylinder 8 only, the locking collar 28 is engaged with the positioning locking portion 14. A drive cylinder 31 mounted on the upper surface of the upper platen 6 can be used as the rotating means for the upper positioning member and locking cylinder 8 as shown in FIG.
Attach the outer end of the piston rod 32 to the vertical pin 33 and the mounting hardware 34.
It may be connected to the upper end surface of the locking cylinder 8 via. Further, a rotary reactor is used as the rotating means, and an internal tooth fan gear is attached to the upper end portion of the locking cylinder body 8,
It can be rotated via a pinion that meshes with this.

Reference numeral 35 is a hydraulic cylinder for the upper die clamp, which is a mounting plate fixed to the upper end surface of the upper positioning member and locking cylinder 8.
While being erected on 36, it is attached downward to the upper end of a base tube 37 that slidably penetrates the upper clamp dome 10.
The piston rod 38 penetrates the base pipe 37, and the lower end surface 38A of the rod is in contact with the upper surface of the upper platen 6. Therefore, by operating the hydraulic cylinder 35 to lower the piston rod 38, the upper positioning member / locking cylinder 8 is raised, and the locking collar 28 is moved to the upper positioning / locking plate.
The upper mold 2 can be clamped to the upper platen 6 via the locking plate 4 by pulling up the locking portion 14 of the upper mold 4. On the contrary, by moving the piston rod 38 upward, the upper positioning member / locking cylinder 8 is lowered and the upper mold 2 can be brought into an unclamped state.

The lower positioning member / locking cylinder 9 includes:
An inward locking flange 39 is projected on the inner peripheral surface of the upper end, and the positioning locking portion 15 of the positioning / locking plate 5 is attached to the locking flange 39.
Corresponding to the above, the positioning notches 40 are provided at four places, the locking plate 5 is fitted to the inner circumference of the locking collar 39, and the lower die 3 is positioned lower than the lower platen 7. The locking tubular body 9 is externally fitted to the outer periphery of the lower platen 7 so as to be positioned through the stop plate 5 so as to be rotatable by a predetermined angle θ via a bush 41 and also movable up and down by a predetermined amount. ing. As shown in FIG. 4, the positioning notch 40 has a slanted guide surface 42 at the upper peripheral edge so that positioning can be facilitated. The peripheral edge of the lower surface of the upper positioning notch 29 is also an inclined guide surface as shown in FIG.

Reference numeral 43 denotes a rotating means for the lower positioning member / locking cylinder 9, which, as shown in FIGS. 1 and 3, has an inner periphery of an inward locking collar 9A provided at the lower end of the cylinder 9. An internal tooth portion 44 formed at one position on the surface, a pinion 45 meshing with the tooth portion 44, and a rotary reactor 46 shown in FIG.
45 is coupled to the output shaft 47 of the rotary actuator 46
It is fixed to the upper end of a transmission shaft 49 connected via 48. The actuator 46 is attached to the main body frame 1, and the transmission shaft 49 penetrates the lower clamp dome 11. By the forward and reverse rotation of the actuator 46, the lower positioning member / locking cylinder 9 is rotated by an angle θ, and is moved to the positioning position and the clamping position of the lower mold 3. Further, an engaging member 50 located above the engaging collar portion 9A and engaging with the engaging collar portion 9A is relatively rotatably fitted into the lower end portion of the engaging cylinder body 9.

Numeral 51 is a hydraulic cylinder for clamping the lower die, which is attached to the lower plate front and rear portions of the lower platen 7 in an upward direction by a tie rod 52, and the upper end of the piston rod 53 has a connecting rod 54.
It is fixed to the lower surface of the engaging member 50 via. The tie rod 52 and the connecting rod 54 are the lower clamp dome.
The lower platen 7 is slidably pierced through and can be vertically moved together without any hindrance, and the engaging member 50 is rotatable relative to the locking cylinder 9. The rotation of the locking cylinder 9 is not restricted.

Therefore, when the lower positioning / locking plate 5 to which the lower mold 3 is attached is clamped on the lower platen 7, the locking cylinder 9 is returned to a predetermined mold setting position. , The locking plate 5 together with the lower mold 3 to the lower platen.
7 Position it on the top of the positioning notch 40
Then, the locking plate 5 is placed on the lower platen 7. Next, the rotary reactor 46 is operated to move the locking cylinder 9 by an angle θ in the direction indicated by arrow a in FIG.
After rotating only for setting to the clamp position, the lower die clamp hydraulic cylinder 51 is operated, the locking cylinder 9 is pulled down through the engaging member 50, and the locking flange 39 is positioned and locked.
The lower mold 3 can be clamped to the lower platen 7 via the locking plate 5 by locking the lower mold 3 to the lower platen 7. On the contrary, the locking cylinder 9 is engaged by the hydraulic cylinder 51 via the engaging member 50.
The lower die 3 can be brought into an unclamped state by raising.

According to the above embodiment, the upper and lower platens 6 and 7 of the upper and lower molds 2 and 3 can be positioned and clamped / unclamped at the same time. It can be commonly used for various types of large and small dies, and can improve workability. The present invention is not limited to the above embodiment, and for example, a hydraulic cylinder can be adopted instead of the rotary reactor 46.

[0019]

As described above, the present invention is a tire vulcanizer in which the lower platen supporting the lower mold is mounted on the main body frame, and the upper platen supporting the upper mold is provided so as to be vertically movable. In the above, there are provided a locking plate having a locking portion at an outer peripheral end attached to each of the molds, and a locking cylinder body which is detachable from the locking plate and provided on the outer peripheral side of each platen. Since it is characterized in that it is fixed to each platen through the above, it is not necessary to fasten the bolt every time the mold is replaced, and a kind of locking plate for various mold dimensions. The upper and lower molds can be automatically clamped and unclamped on the upper and lower platens, greatly improving work efficiency.

[Brief description of drawings]

FIG. 1 is a partially omitted central vertical cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an enlarged view of portion C in FIG.

FIG. 5 is an enlarged partial view of arrow D in FIG.

FIG. 6 is a partially omitted central vertical cross-sectional view of a conventional example.

FIG. 7 is a top view of a lower platen in a conventional example.

[Explanation of symbols]

 1 Main frame 2 Upper mold 3 Lower mold 4 Upper positioning locking plate 5 Lower positioning locking plate 6 Upper platen 7 Lower platen 8 Upper positioning member and locking cylinder 9 Lower positioning member and locking cylinder 14 Positioning member Stop 15 Positioning Lock 35 Hydraulic cylinder for upper die clamp (driving means) 51 Hydraulic cylinder for lower die clamping (driving means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B29K 105: 24 B29L 30:00 4F

Claims (2)

[Claims] 1. A tire vulcanizer in which a lower platen supporting a lower mold is mounted on a main body frame, and an upper platen supporting an upper mold is vertically movable. Tightening and fixing to each platen through the attached locking plate having a locking portion at the outer peripheral end and the locking tubular body that is detachable from the locking plate and provided on the outer peripheral side of each platen A mold clamping device for a tire vulcanizer, which is characterized in that 2. A mold clamp for a tire vulcanizer according to claim 1, wherein each of the locking cylinders is moved up and down with respect to each platen by driving means to clamp and fix the locking plate. apparatus.