JPH0450086Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold height adjustment device for a tire press.

[Conventional technology]

In tire presses, it is necessary to adjust the spacing between the upper and lower molds depending on the size of the tire, and for this purpose, a mold height adjustment device is provided (Japanese Patent Publication No. 10356/1983, No. 49/1999). 30280
(Refer to Japanese Patent Application Laid-open No. 59-22741).

[The problem that the idea aims to solve]

However, all of the conventional mold height adjusting devices disclosed in the above-mentioned publications are provided at the center of the tire press, making it difficult to uniformly press the upper mold against the lower mold.

Furthermore, when adjusting the height of the upper mold, it was difficult to maintain its parallelism.

In other words, since the mold height adjustment device is nothing more than a single screw installed in the center of the tire press, the top of the upper platen may bend or the upper platen may tilt due to play in the screw, resulting in uniform pressing. In particular, as the tire press becomes larger, the mold also becomes larger, so the above-mentioned problem is significant.

Therefore, an object of the present invention is to enable the upper mold to be pressed uniformly against the lower mold and to maintain the parallelism of the upper mold when adjusting the height.

[Means to solve the problem]

The present invention includes a lower mold 3 on the upper surface side of the lower dome 1 via a lower platen 2, and the lower dome 1
In the tire press, an upper mold 6 whose height is adjustable via an upper platen 5 is provided on the lower surface side of an upper dome 4 which can be raised and lowered, and the upper and lower molds 6 and 3 can be opened and closed. To achieve this objective, we have taken the following technical measures:

That is, in the present invention, the upper dome 4 at the center of the press
An elevating guide means 13 is provided between the upper dome 5 and the upper platen 5 to relatively guide them in the direction of the press axis, and a center gear 14 is provided at the upper dome 4 at the center of the press, which rotates synchronously via a driven gear 15 meshing with the center gear 14. A female screw rotating body 16 is provided on the upper dome 4 at a radial position of the center of the press, and a corresponding female screw rotating body 16
A male screw body 17 is connected to the upper platen 5 and is screwed into each of the center gears 1 and 17 and moves up and down synchronously in the press axis direction by screw action.
4 is equipped with a drive body 18 that rotates forward and backward around the press axis.

[Effect]

When the drive body 18 is rotated forward or reverse, the center gear 14 is rotated forward or reverse via the drive pinion 19, drive pinion 21, and the like.

Each of the female screw rotating bodies 16 provided in the upper dome 4 at a radial position of the center of the press is connected to the center gear 1.
The female screw rotating body 1 is rotated in either the forward or reverse direction through the driven gear 15 meshing with the center gear 14.
6 rotate in either forward or reverse direction in synchronization.

Since the male threaded body 17 connected to the upper platen 5 is screwed into each of the corresponding female threaded rotating bodies 16, the male threaded bodies 17 are synchronized in the press axis direction by the synchronous rotation of the female threaded rotating bodies 16. The height of the upper mold 6 provided on the upper platen 5 is adjusted.

At this time, the upper dome 4 and the upper platen 5 are guided relative to each other in the axial direction of the press by the guide means 13, and the female screw rotating body 16 is at a radial position of the center of the press, into which the male screw body 17 is screwed. Therefore, the pressing of the upper mold 6 is uniform and there is no deviation in parallelism.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2 showing the first embodiment of the present invention, the tire press is equipped with a lower mold 3 on the upper surface of the lower dome 1 via a lower platen 2. The main structure includes an upper mold 6 whose height is adjustable via an upper platen 5 inside an upper dome 4 which can be raised and lowered.

The lower dome 1 consists of a bottom plate 1A and a body part 1B standing on the outer periphery of the bottom plate 1A, and is provided on a press base 7, with a central mechanism 8 having a bladder etc. at the center of the press.
It is equipped with

The upper dome 4 consists of a top plate 4A and a body part 4B vertically disposed on the outer periphery of the top plate 4A.
The upper and lower molds 6,
3 can be opened and closed freely.

In addition, the upper and lower domes 4 and 1 are equipped with lock rings 10.
etc., it is said that it can be fixed and released freely.

A cylindrical guide support 11 is provided vertically at the press center of the top plate 4A in the upper dome 4, and a guided support 12, which stands up from the upper platen 5, is slidably fitted into this guide support 11. Further, a guide means 13 is configured to relatively guide the upper dome 4 and the upper platen 5 at the center of the press (center of the mold) in the direction of the press axis.

A ring-shaped center gear 14 is rotatably fitted onto the guide support 11 of the guide means 13 via a bush or the like, and the center gear 14 is provided here on the upper dome 4 at the center of the press.

On the top plate 4A of the upper dome 4, a female screw rotary body 16 having four driven gears 15 is provided at a radial position from the center of the press, and is equally divided around the circumference as shown in FIG. The driven gear 15 is meshed with the center gear 14.

Each of the female screw rotary bodies 16 is rotatable via a bush or the like, and is prevented from coming off by sandwiching the top plate 4A between a flange 16A and a gear support 15A provided at the lower part of the rotary body 16.

A male screw body 17 is erected on the upper platen 5 corresponding to the female screw rotary body 16, and the male screw body 17 is screwed into the corresponding female screw rotary body 16. Male thread body 1 with synchronous rotation
7 are raised and lowered all at once by screw action, and here, the upper mold 6 is held parallel to the lower mold 3 via the upper platen 5, and the height can be freely adjusted by uniformly pressing against the lower mold 3. has been done.

The center gear 14 can be rotated in the forward and reverse directions by a driving body 18, and the driving body 18 rotates the driving pinion 19 of the prime mover in the forward and reverse directions by the driving pinion 21 via the deceleration relay gear 20. Driven gear 15 due to reverse rotation
By rotating the female screw rotating body 16 via
The height of the upper mold 6 can be adjusted by the male screw body 17.

In addition, in FIG. 2, 22 indicates a bolt attachment portion for the upper mold.

3 to 6 show a second embodiment of the present invention, in which the driving pinion 21 of the first embodiment is provided coaxially with one of the driven gears 15 meshing with the center gear 14, thereby forming an upper dome 4. This embodiment has been improved by eliminating space restrictions for various mounting members on the top plate 4A, and by increasing the diameter of the drive pinion 21 to ensure reliable drive.Other basic configurations are the same as the first embodiment. Since they are common, common parts are indicated by common symbols, and differences will be described below.

In FIG. 4, the support 23 is attached to the driven gear 15.
are concentrically fixed by bolts 24, and a drive pinion 21 is rotatably provided on the support 23 concentrically on the driven gear 15.
It is concluded in one body by.

The female screw rotating body 16 is rotatable by sandwiching the top plate 4A between a thrust collar 26 provided on the top plate 4A and a flange 16A, and the remaining driven gear 15 is mounted on the top of the female screw rotating body 16 as shown in FIG. It is fixed with a parallel pin 26 and a fastening bolt 27.

Further, the driving pinion 21 meshes with the upper side of the center gear 14, each of the driven gears 15 at radial positions meshes with the lower side of the center gear 14, etc.
In FIGS. 3 and 5, reference numeral 28 denotes a jack pinion, which manually rotates the center gear 14, and is provided by a chain 31 together with a shaft 30 having a tool locking head 29.

Also in this second embodiment, the drive pinion 21
By rotating the center gear 14 forward and backward through the
The female screw rotary bodies 16 are rotated in synchronism through the respective driven gears 15, and the upper platen 4 is raised and lowered all at once through the female screw bodies 17, thereby uniformly pressing the upper mold 6 and maintaining parallelism.

In addition, in FIG. 4, 32 indicates a driver mounting bracket, and in FIG. 1, 33 is a fluid pressure cylinder whose piston rod 34 is attached to the upper mold 6.
connected to the side.

[Effect of idea]

The present invention is as described above, and when adjusting the height of the upper and lower molds according to the size of the tire, the female A screw rotating body is provided on the upper dome at a radial position from the center of the press, and a male screw body is provided on the upper platen, which is screwed into each of the female screw rotating bodies and moves up and down in synchronization with the press axis direction by screw action. Therefore, the upper mold attached to the platen is raised and lowered all at once by either forward or reverse rotation of the center gear, and is pressed uniformly while maintaining parallelism. Green tires can be precisely vulcanized and molded without the risk of creating gaps on the mating surfaces of the molds.

Moreover, since a guide means is provided at the center of the press for relatively guiding the upper dome and the upper platen in the direction of the press axis when the upper platen is moved up and down by the screw action, the height of the upper mold can be accurately adjusted.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a partially omitted vertical sectional view of the first embodiment, FIG. 2 is a circumferential plan view, FIG. 3 is a plan view of the second embodiment, and FIG. 4 is the third
5 is a sectional view taken along line C--C in FIG. 3, and FIG. 6 is a sectional view taken along line DD--D in FIG. 3. 1...Lower dome, 2...Lower platen, 3...Lower mold, 4...Upper dome, 5...Upper platen,
6... Upper mold, 13... Lifting guide means, 14
... Center gear, 15 ... Driven gear, 16 ... Female screw rotating body, 17 ... Male screw body, 18 ... Drive body.

Claims (1)

[Claims for Utility Model Registration] A lower mold 3 is provided on the upper surface side of the lower dome 1 via a lower platen 2, and an upper platen 5 is provided on the lower surface side of the upper dome 4 that can be raised and lowered with respect to the lower dome 1. In this tire press, the upper dome 4 and the upper platen 5 are arranged relative to each other in the direction of the press axis between the upper dome 4 at the center of the press and the upper platen 5. A center gear 14 is provided on the upper dome 4 at the center of the press, and a female screw rotating body 16 rotates synchronously via a driven gear 15 meshing with the center gear 14.
are provided on the upper dome 4 at radial positions around the center of the press,
A male screw body 17 is connected to the upper platen 5 and is screwed into each of the corresponding female screw rotating bodies 16 and moves up and down synchronously in the press axis direction by screw action. A mold height adjusting device for a tire press, comprising a drive body 18 that rotates forward and backward around the center.