JPH04332607A - Vulcanizing press of tire - Google Patents

Abstract

PURPOSE:To make maintenance and inspection of the vicinity of a top and bottom mold fitting members each apt to perform and miniaturize the whole of a device, by a method wherein a locking device connecting the tip of a piston rod and the tip of a tie rod with each other or releasing them from each other is provided. CONSTITUTION:An upper mold fitting member 4 is supported elevatably freely along a stand frame 11, a lower mold fitting member 3 is put on a base frame 10 movably slightly in a vertical direction, a tightening cylinder 19 is of a double action both rod cylinder and provided firmly on the lower mold fitting member 3. A locking devices 20 which are connectable or releasable freely are arranged on confronting parts with an upper tip of a piston rod 19a and a lower end of a tie rod 17. A plurality of the tie rods 17 hung down from the upper mold fitting member 4 is connected with the piston rod 19a of the tightening cylinder 19 through the locking device 20 and the lower mold fitting member 3 is pressurized so that the same is pulled up toward the upper mold fitting member 4.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a tire vulcanizing press that uses a hydraulic cylinder to tighten the upper and lower molds for vulcanizing tires, and vertically lifts and lowers the upper molds to take out the vulcanized tires. Regarding.

0002

2. Description of the Related Art There are various kinds of hydraulic tightening and vertically lifting type tire vulcanizing presses. Classifying from the viewpoint of the press frame that receives the reaction force of the hydraulic tightening cylinder, it can be broadly divided into square frame type and dome lock type. The square frame type is disclosed in JP-A-59-12827, JP-A-61-134210, and JP-A-63-118209.
There is something shown in the publication. This square frame type requires a strong frame to receive the reaction force of the hydraulic tightening cylinder, and requires a retractable transmission member that supports the reaction force between the upper mold that moves up and down and the press frame.

[0003] Therefore, the dome lock type is a system that simplifies the frame and eliminates the need for supporting members by housing the upper and lower molds in upper and lower domes that can be opened and closed and pressurizing the upper and lower molds within the upper and lower domes. , and JP-A-56-161139 and JP-A-59-138432.
The one shown in Publication No. 1 is known. The tire curing press of the present invention is intended to further improve this dome lock type.

[0004] Next, according to FIG.
The dome lock type tire vulcanizing press of Publication No. 32 will be explained. 1 is a lower mold, 2 is an upper mold, 3 is a lower mold attachment member such as a lower platen, 4 is an upper mold attachment member such as an upper platen, 5 is a lower dome, 6 is an upper dome, 7 is a locking device, and 8 is a tightening member. cylinder, 9 is a lifting cylinder, 10
1 is a base frame, 11 is a stand frame, and 12 is a mold height adjustment device. The lower mold 1 is attached to the lower mold attachment member 3 with bolts or the like, and the lower mold attachment member 3 is attached to the base frame 10 with a support rod 13.
is fixed. The upper mold 2 is attached to the upper mold attachment member 4 with bolts or the like, and the upper mold attachment member 4 is attached to the upper dome via a mold height adjustment device 12 (which absorbs the difference in height between the upper and lower molds 1 and 2). It is fixed at 6. The lower dome 5 is guided by a support rod 13 and can be moved up and down slightly. A tightening cylinder 8 is attached to the lower surface of the lower dome 5, and a piston rod 8a is connected to the lower mold attachment member 3. The dome 6 is attached to a horizontal frame 14, and the horizontal frame 14 is guided by a side frame 11. An elevating lidar 9 is connected to the side frame 11. The lock device 7 is for connecting or releasing the upper and lower domes 5 and 6, and for example, a bayonet lock or the like is used.

The operation of the dome lock type tire curing press described above is as follows. First, the opening/closing operation will be explained. When the locking device 7 is released and the elevating cylinder 9 is extended, the horizontal frame 14 is guided by the stand frame 11 and rises. Then, the upper dome 6, the upper mold attachment member 4, and the upper mold 2 are in the raised position as shown by the two-dot chain line, and the green tire is mounted and the molded tire is removed. Further, when the elevating cylinder 9 is shortened, the upper dome 6 becomes the solid line position, and the locking device 7 connects the upper and lower domes 5 and 6 to complete the closing operation. Next, the tightening operation of the upper and lower molds 1 and 2 will be explained. When pressure oil is supplied to port a of the tightening cylinder 8, the tightening cylinder 8
The lower dome 5 connected to is pressurized in the downward direction. Since the upper dome 6 is connected to the lower dome 5 by the locking device 7, the upper dome 6 and the upper mold attachment member 4, ie, the upper mold 2, are pulled down and pressure is applied between the upper and lower molds 1 and 2.

[0006]

[Problems to be Solved by the Invention] In the dome lock type tire vulcanizing press shown in FIG. 6, since the upper mold mounting member 4 is housed in the cylindrical dome 6, it is difficult to connect the heated steam piping to the upper and lower platens. There was a problem in that there was no maintenance space, making it difficult to carry out maintenance and inspection work. In addition, the upper and lower domes 5 and 6 are formed by the upper and lower molds 1 and 2.
In order to support the reaction force of the pressurization, it is necessary to make the tire thick, which has the problem of increasing the size of the entire tire vulcanizing press. Particularly, as shown in the figure, when having left and right molds, in order to prevent interference between the upper and lower domes 5, 6 and the locking device 7, it is necessary to space the centers of the left and right molds considerably apart.

The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to facilitate maintenance and inspection of the upper mold mounting member and the lower mold mounting member; It is an object of the present invention to provide a tire vulcanizing press that can reduce the size of the entire device.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the tire vulcanizing press of the present invention has an upper mold mounting member that is supported along a stand frame so as to be able to rise and fall freely, and an upper mold mounting member that is slightly mounted on the base frame in a vertical direction. a lower mold mounting member mounted movably; a plurality of tie rods hanging down from the upper mold mounting member; a plurality of tightening cylinders that are fixed to the lower mold mounting member and whose piston rods face the tie rods; and a piston. It consists of a locking device that connects or releases the rod tip and the tie rod tip.

[0009]

[Operation] A plurality of tie rods hanging down from the upper mold mounting member are connected to the piston rod of the tightening cylinder via a locking device, and the lower mold mounting member, on which the tightening cylinder is fixed, faces toward the upper mold mounting member. It is pressurized to be pulled up.

0010

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a tire curing press of the present invention, and FIGS. 2 to 5 show specific structural examples thereof.

In FIG. 1, the points that are different from FIG. 6 will be mainly explained. Components that operate in the same manner as in FIG. 6 are designated by the same reference numerals and their explanations will be omitted. The upper mold mounting member 4 includes an upper platen 15, a mold height adjustment device 12, and an upper plate 1.
It consists of 6. Four tie rods 17 are suspended from this upper plate 16. This upper plate 16 is an integral part common to the left and right molds, and the left and right stand frames 11
are guided by. Further, an elevating cylinder 9 is connected to the protrusion 16a of the upper plate 16. The lower mold attachment member 3 is inserted into a guide rod 18 implanted in the base frame 10, and placed on the base frame 10 so as to be able to move slightly in the vertical direction. The tightening cylinder 19 is a double-acting double-rod cylinder, and is fixed to the lower mold attachment member 3. The upper end of the piston rod 19a faces the lower end of the tie rod 17, and a locking device 20 that can be connected or opened is disposed at this opposing portion. A nut 21 is screwed into the lower end of the piston rod 19b and engages with a stopper 22 protruding from the side surface of the base frame 10.

[0012] The operation of the tire curing press having the above structure will be explained. First, the opening/closing operation will be explained. When the locking device 20 is released and the lifting cylinder 9 is extended, the upper plate 1
6 is guided by the stand frame 11 and rises. Then, the upper mold mounting member 4 is in the raised position as shown by the two-dot chain line, and the green tire is mounted and the molded tire is taken out. Also, if the elevating cylinder 9 is shortened,
The upper mold mounting member 4 is in the solid line position, the tip of the tie rod 17 and the tip of the cylinder rod 19a are facing each other, and the tie rod 17 and the cylinder rod 19 are locked by the locking device 20.
The closing operation is completed with a connected state. Next, the tightening operation of the upper and lower molds 1 and 2 will be explained. Tightening cylinder 19
When pressure oil is supplied to port a of the piston rod 19a,
Since the tie rod 17 is connected to the tightening cylinder 19 itself, that is, the lower mold mounting member 3 is pulled up.
Pressure is applied between the upper and lower molds 1 and 2. By the way, even if there is some height difference between the left and right mold height adjustment devices 12, this difference is absorbed because the lower mold 2 is pulled up separately (in FIG. 6, the fixed lower mold 2, the difference between the left and right mold height adjusting devices 12 may result in a difference in pressing force).

Next, specific examples will be explained with reference to FIGS. 2 to 5. FIG. 2 is a half longitudinal sectional front view of the tire curing press of the present invention;
3 is a sectional view taken along the line X--X in FIG. 2, FIG. 4 is a diagram showing a locking device, and FIG. 5 is a diagram showing an opening/closing device of the locking device.

In FIGS. 2 and 3, an upper plate 16 and an upper platen 15 constituting the upper mold mounting member 4 are connected via a screw type mold height adjustment device 12 and a guide rod 23 so that the height can be adjusted. ing. The lower end of the tie rod 17 faces the extension member 31 of the piston rod 19a within the locking device 20. The lower mold mounting member 3 is composed of a lower platen 24 and a lower plate 25, and a boss 25 of the lower plate
A lower platen 24 is fixed onto the platen a via a heat insulating material. The lower plate 25 is placed on the base frame 10 via the guide rod 18. Upper platen 15 and lower platen 24
are surrounded by heat insulating plates 26, 27, and 28, but since these are members unrelated to the pressing force, they can be made thin and removable. Therefore, by removing important parts of the heat insulating plates 26, 27, 28, maintenance and inspection of the upper and lower platens 15, 24, the piping for the upper and lower molds 1, 2, etc. can be easily performed. Moreover, as shown in FIG. 3, by arranging the locking device 20 at the very edge of this heat insulating plate 28 (in FIG. 5, the heat insulating material 27
(The tie rod 17 is placed at the very edge), the entire press can be made smaller compared to the conventional dome lock type.

As shown in FIG. 3, the tightening cylinder 19
is fixed on the lower surface of the lower plate 25 at a position that does not interfere with the base frame 10. The piston rod 19a in FIG. 2 is integrated with an extension member 31 via a coupling 32. A nut 21 is screwed into the lower end of the piston rod 19b and engages with a stopper 22 protruding from the base frame 10. The reason why the tightening cylinder 17 is made into a double-acting, double-rod cylinder is as follows. When taking out the tire after vulcanization, the center mechanism 29 is usually raised, so there is a risk that the lower mold attachment member 3 will be raised due to frictional force and force to peel off the vulcanized tire from the mold. When hydraulic pressure is introduced into port b of the tightening cylinder 19, the piston rod 19b is engaged with the stopper 22, so the main body of the tightening cylinder 19, that is, the lower mold attachment member 3, is pulled down and raised from the predetermined lower limit position. There's nothing to do.

Next, details of the lock device 20 will be explained with reference to FIG. FIG. 4(a) is a top view, and FIG. 4(b) is a longitudinal sectional front view. This locking device 20 uses a rotating lock ring 30, and each lock ring 30 has four teeth 30a and a notch 30b on the upper side, and a large diameter hole 30d and a small diameter hole 30c on the lower side. It has become. Four teeth 17a are arranged in a row at the tip of the tie rod 17, passing through the notch 30b. This tooth 17a is the notch 3
By passing through 0b, the tie rod 17 is released. When the lock ring 30 rotates by 45 degrees, the lock ring 30 enters a connected state in which the teeth 17a and the teeth 30a engage, as shown in FIG. 4(a). Further, the extension member 31 is inserted into the large diameter hole 30d, and the extension member 31 and the lock ring 30 are fixed by screwing the coupling 32.

Next, the drive device 40 of the locking device 20 will be explained with reference to FIG. Figure 5(a) is a top view, Figure 5(b)
is a front view. One or two brackets 33 are protruded from each of the lock rings 30, and the brackets 33
Connecting rods 34, 35, and 36 are pivotally supported between them. As shown in FIG. 5(a), a bracket 37 is protruded from the connecting rod 34, and the bracket 37 and the lower plate 2
A cylinder 38 is provided between the cylinders 5 and 5. These connecting rods 34, 35, 36 and cylinder 38 are connected to the drive device 40.
It consists of When the cylinder 38 expands, the connecting rod 34 moves to the left in the drawing, and the left and right lock rings 30 rotate. The remaining lock rings 30 are simultaneously rotated by the connecting rods 35 and 36 in FIG. 5(a), and the four sets of locking devices are simultaneously released or connected. By using four tie rods 17, four sets of locking devices 20 are also required, but these locking devices 20 are different from the drive device 40 described above.
At the same time, the tie rod 17 and the piston rod of the tightening cylinder 19 are opened or connected.

[0018]

[Effect of the invention] In the tire curing press of the present invention,
A plurality of tie rods suspended from the upper mold mounting member are connected to the piston rod of the tightening cylinder via a locking device, and the lower mold mounting member to which the tightening cylinder is fixed is pulled up toward the upper mold mounting member. Since the upper and lower molds are pressurized, there are only tie rods around the upper and lower molds, and maintenance and inspection of the upper and lower molds is facilitated by, for example, a removable heat insulating material. Further, by arranging the tie rods at, for example, the four corners, protrusions on the left, right, front, and rear sides can be reduced, and the entire tire curing press can be downsized.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a tire curing press of the present invention.

FIG. 2 is a half longitudinal sectional front view of the tire curing press of the present invention.

FIG. 3 is a sectional view taken along the line XX in FIG. 2;

FIG. 4 is a diagram showing a locking device.

FIG. 5 is a diagram showing an opening/closing device of the locking device.

FIG. 6 is a schematic diagram of a conventional tire curing press.

[Explanation of symbols]

1 Lower mold 2 Upper mold 3 Lower mold mounting member 4 Upper mold mounting member 17 Tie rod 19 Tightening cylinder 20 Lock device

Claims (1)

[Claims] Claim 1: An upper mold mounting member supported so as to be able to rise and fall along a stand frame, a lower mold mounting member mounted on a base frame so as to be slightly movable in the vertical direction, and a lower mold mounting member suspended from the upper mold mounting member. A tire curing press comprising a plurality of tie rods, a plurality of tightening cylinders that are fixed to a lower mold mounting member and whose cylinder rods face the tie rods, and a locking device that connects or releases the piston rod tip and the tie rod tip. .