JP3001709B2 - Tire vulcanizing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizer in which upper and lower molds for vulcanizing and molding a tire are tightened by a hydraulic cylinder, and an upper mold is vertically moved to remove the vulcanized tire. The present invention relates to a sulfur press and, more particularly, to a press capable of securing a sufficient space for a center mechanism disposed on the center of the press, a segment mold opening / closing cylinder, and the like.

[0002]

2. Description of the Related Art The applicant has previously proposed a tire vulcanizing press shown in FIG. 4 in Japanese Patent Application No. 3-133425.
This tire vulcanizing press will be described with reference to FIG.

In FIG. 4, this tire vulcanizing press comprises a lower mold 21, an upper mold 22, and a lower mold mounting member 23.
, Upper mold mounting member 24, base frame 25
, A stand frame 26, a tightening cylinder 27, and a lifting cylinder 28. The lower mold 21 and the upper mold 22 are attached to the lower mold attaching member 23 and the upper mold attaching member 24 by bolts or the like, respectively.
The lower mold mounting member 23 is inserted into a guide rod 29 implanted in the base frame 25,
5 is mounted so as to be able to move up and down slightly. The upper mold mounting member 24 includes an upper platen 30, a mold height adjusting device 31 for absorbing a difference in height between upper and lower molds 21 and 22, and an upper plate 32. A tie rod 33 is hung. The upper plate 32 is an integral body common to the left and right dies, and is guided by the left and right stand frames 26. Also, the protruding portion 32 of the upper plate 32
The lifting cylinder 28 is connected to a. The tightening cylinder 27 is fixed to the lower mold mounting member 23, and the upper end of the piston rod 27 a of the tightening cylinder 27 faces the lower end of the tie rod 33. A lock device 34 that can be freely connected or opened is disposed at the facing portion.

Next, the operation of the tire vulcanizing press having the above-described structure will be described. First, the opening / closing operation will be described. When the lock device 34 is opened and the lift cylinder 28 is extended, the upper plate 32 is guided by the stand frame 26 and rises. Then, when the upper mold mounting member 24 is at the raised position indicated by the two-dot chain line, the mounting of the green tire and the removal of the vulcanized tire are performed. The lifting cylinder 2
When the length 8 is shortened, the upper mold mounting member 24 moves down to the solid line position. At this time, the lower end of the tie rod 33 and the upper end of the cylinder rod 27a face each other,
When the tie rod 33 and the cylinder rod 27a are connected by the lock device 34, the closing operation is completed. Next, the tightening operation of the upper and lower dies 21, 22 will be described. When pressurized oil is supplied to the port a of the tightening cylinder 27, the tie rod 33 and the cylinder rod 27a are connected to each other. A tightening force is applied between the mounting members 23, and the upper and lower molds 21,
Pressurization between 22 is performed.

[0005]

In the tire vulcanizing press proposed by the applicant, since the tightening cylinder 27 is installed below the lower mold mounting member 23, the central portion of the lower mold mounting member 23 is provided. It is not possible to secure a sufficient space for the center mechanism that can be freely moved up and down. FIG. 5 shows an arrangement in which the tightening cylinder is installed below the lower mold mounting member.
As shown in the figure, the tightening cylinder 41 is installed on the upper frame 42, and the pressurizing transmission rod 44 erected on the upper mold mounting member 43 is pushed down by the tightening cylinder 41, so that the upper mold mounting member 43 and the lower mold mounting are mounted. In some cases, a tightening force is applied between the members 45. However, in this case, since the tightening cylinder and the pressure transmission rod are provided on the press center above the upper mold mounting member, the segment mold opening / closing cylinder disposed on the press center above the upper mold mounting member. In addition, there is a problem that a sufficient space cannot be secured for a mold height adjusting device and the like.

[0006] The present invention has been made in view of such problems of the prior art, and an object thereof is to provide a center mechanism arranged on the center of a press,
An object of the present invention is to provide a tire vulcanizing press capable of securing a sufficient space for a segment mold opening / closing cylinder and the like.

[0007]

In order to achieve the above object, a tire vulcanizing press according to the present invention comprises: an upper mold mounting member supported up and down along a stand frame;
A lower mold mounting member fixed on the base frame, a tightening cylinder installed on the stand frame to apply a tightening force between the upper mold mounting member and the lower mold mounting member, and a tightening cylinder mounted on the upper mold mounting member; It is composed of a piston rod of an attached cylinder and an engaging plate which is engaged or disengaged. Also, an upper mold mounting member supported to be able to move up and down along the stand frame, a lower mold mounting member fixed on the base frame, an engagement plate mounted on the upper mold mounting member, It is also possible to use a tightening cylinder which is movably arranged and in which the engagement plate and its piston rod are engaged or disengaged to apply a clamping force between the upper mold mounting member and the lower mold mounting member.

[0008]

In the state where the engagement plate and the piston rod of the tightening cylinder are not engaged, the upper mold mounting member can be moved up and down along the stand frame, the upper and lower molds are closed, and the engagement plate and the tightening cylinder are closed. When the piston rod of the tightening cylinder is extended and the engaging plate is pushed downward in a state where the piston rod can be engaged, a tightening force is applied between the upper mold mounting member and the lower mold mounting member, and Pressing between the dies is performed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of a tire vulcanizing press according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

Referring to FIGS. 1 and 2, the tire vulcanizing press has a press frame composed of a base frame 1, a stand frame 2 and an upper frame 3. The mold 5 is fixed. An upper mold 6 that can be opened and closed by the lower mold 5 is fixed to an upper mold mounting member 7. The upper mold mounting member 7 includes a piston rod of an elevating cylinder 8 provided on the side of the upper frame 3. The end of 8a is fixed. The upper mold mounting member 7 can move up and down along the stand frame 2 by extending and contracting the piston rod 8 a of the elevating cylinder 8.

An engaging plate 9 having an engaging portion 9a is rotatably attached to the upper mold mounting member 7. The engaging plate 9 is driven by a driving device (not shown) as shown by a solid line in FIG. The engagement position and the non-engagement position indicated by a two-dot chain line can be taken. The engagement plate 9 is provided with a long hole 9b.
The piston rod 8a is inserted through the elongated hole 9b. A tightening cylinder 10 is provided on the stand frame 2, and an end of the piston rod 10a is engaged with the engaging portion 9a of the engaging plate 9 when the engaging plate 9 is at the engaging position. I am getting it. The end of the piston rod 10a is
When the piston rod 10a is extended and the engaging plate 9 is pushed down in a state where the upper mold mounting member 7 and the lower mold mounting member 4 can be engaged with each other, a tightening force is applied between the upper mold mounting member 7 and the lower mold mounting member 4, and the upper and lower dies. Pressurization between 5 and 6 is performed. An engaging portion 2a is provided on the upper portion of the stand frame 2. When the engaging plate 9 is rotated with the upper mold mounting member 7 raised to the upper limit position, the engaging plate 9 is engaged. The mating portion 9a engages with the locking portion 2a. Further, a center mechanism 15 is installed at the center of the lower mold mounting member 4 so as to be able to move up and down.

Next, the operation of the tire vulcanizing press having the above-described structure will be described with reference to FIGS. With the engagement plate 9 in the disengaged position in FIG. 2, the piston rod 8 a of the lifting cylinder 8 is reduced, and the upper mold 6 is raised via the upper mold mounting member 7. Then, the green tire is set in the lower mold 5, the piston rod 8 a of the lifting cylinder 8 is extended, the upper mold 6 is lowered via the upper mold mounting member 7, and the upper and lower molds 5 and 6 are closed. I do. Next, the engagement plate 9 is turned to the engagement position shown in FIG.
Is extended and the engagement plate 9 is pressed down, a tightening force is applied between the upper mold mounting member 7 and the lower mold mounting member 4, and pressurization between the upper and lower molds 5 and 6 is performed.

When the mold clamping pressure is completed, the clamping cylinder 1
The 0 piston rod 10a is reduced. Then, the engagement plate 9 is rotated to the non-engagement position in FIG. 2, the piston rod 8 a of the lifting cylinder 8 is reduced, and the upper mold 6 is raised via the upper mold mounting member 7. And
The vulcanization operation is completed by discharging the vulcanized tire out of the machine, and a new green tire is charged and set in the lower mold 5 to start the next vulcanization operation. In the case of replacing a mold, the upper mold mounting member 7 is raised to the upper limit position, and the engaging plate 9 is rotated at this position to rotate the engaging portion 9a.
Is engaged with the locking portion 2a of the stand frame 2, the engagement plate 9 also functions as a fall prevention device. As described above, since the tightening cylinder is installed on the stand frame and greatly deviated from the center of the press, it is necessary to secure sufficient space for the center mechanism placed on the center of the press, the cylinder for opening and closing the segment mold, etc. Can be.

In the above-described embodiment, the tightening cylinder is fixed to the stand frame and the engaging plate is rotated. However, as shown in FIG. 3, the engaging plate is fixed to the upper mold mounting member and tightened. By arranging the attachment cylinder movably in the horizontal direction, the piston rod of the fastening cylinder and the engagement portion of the engagement plate can be engaged or disengaged. This tightening cylinder 1
Numeral 6 denotes a driving device (not shown) that can take an engagement position shown by a solid line and a non-engagement position shown by a two-dot chain line. When in the engagement position, it can engage with the engagement portion 17 a of the engagement plate 17.
The end of the piston rod 16a is
When the piston rod 16a is extended and the engagement plate 17 is pushed down in a state where the engagement plate 17 can be engaged with the engagement portion 17a, a tightening force is applied between the upper mold attachment member 7 and the lower mold attachment member 4. Then, pressurization between the upper and lower molds 5 and 6 is performed. Also in this case, since the tightening cylinder is disposed on the stand frame and largely deviated from the center of the press, the same effect as in the above embodiment can be obtained.

In each of the embodiments described above, a tire vulcanizing press in which one vulcanizing die is provided on a press frame has been described. However, a type in which a plurality of vulcanizing dies are provided on a press frame is described. Can be applied in the same manner, and the same effects as in the above embodiments can be obtained.

Further, in the case of a tire vulcanizing press for vulcanizing and molding large tires for buses, trucks and the like, the cylinder inner diameters of two lifting cylinders and two tightening cylinders are set to be the same, and the lifting cylinders are tightened. By using the additional load, a four-point equal load press can be obtained.

[0017]

The present invention is configured as described above, and has the following effects. Since the tightening cylinder is installed on the stand frame and largely deviated from the center of the press, a sufficient space can be secured for the center mechanism disposed on the center of the press, the cylinder for opening and closing the segment mold, and the like.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a tire vulcanizing press of the present invention.

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

FIG. 3 is a sectional view showing another fastening cylinder and an engagement plate.

FIG. 4 is a schematic view of a conventional tire vulcanizing press.

FIG. 5 is a partial sectional view of another conventional tire vulcanizing press.

DESCRIPTION OF SYMBOLS 1 Base frame 2 Stand frame 4 Lower mold mounting member 5 Lower die 6 Upper die 7 Upper mold mounting member 9 Engagement plate 9a Engagement part of engagement plate 10 Tightening cylinder 10a Tightening cylinder 10a Piston rod

──────────────────────────────────────────────────の Continuing on the front page (51) Int.Cl. ⁷ identification code FI B29L 30:00 (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 33/02-33/04 B29C 33/20 -33/24 B29C 35/02-35/04

Claims (2)

(57) [Claims] 1. An upper mold mounting member supported up and down along a stand frame, a lower mold mounting member fixed on a base frame, and an upper mold mounting member and a lower mold mounting member mounted on a stand frame. A tire vulcanizer, comprising: a tightening cylinder for applying a tightening force therebetween; and an engaging plate attached to an upper mold mounting member and engaged or disengaged with a piston rod of the tightening cylinder. press. 2. An upper mold mounting member supported up and down along a stand frame; a lower mold mounting member fixed on a base frame; an engagement plate mounted on the upper mold mounting member; An engagement plate and a piston rod thereof are engaged or disengaged so as to be horizontally movable on the frame, and include a tightening cylinder that applies a tightening force between the upper mold mounting member and the lower mold mounting member. A tire vulcanizing press.