JPS63286304A - Vulcanizing device - Google Patents

Abstract

PURPOSE:To simplify structure of the title device by making height control of a top force unnecessary by absorbing a difference in the total heights by a cylinder and to improve working efficiency, by suspending an action of the cylinder by pushing the top force against a bottom force by making use of the cylinder for an up-and-down motion of the top force. CONSTITUTION:The title device is provided with a pressure sensor 31 detecting inner pressure of a pressurizing cylinder 12, a position sensor 34 detecting a position of a piston rod 14 and a controller 32 storing a position of the piston rod 14 of the pressurizing cylinder 12 as the imaginary starting point P based on signals from the pressure sensor 31 and position sensor 34 when the inside pressure of the pressurizing cylinder 12 is raised over a preset value. After completion of vulcanization, the piston rod 14 of the pressurizing cylinder 12 is raised up to a waiting position Q separated from the imaginary starting point P by a predetermined very small distance S. Therefore, if the imaginary starting point P is determined only once whenever a mold is exchanged, a return stroke of the piston rod 14 of the pressurizing cylinder 12 can be controlled within a fixed very small distance and production efficiency can be improved extremely.

Description

[Detailed Description of the Invention] Li! - Upright ■ and ±j This invention relates to a vulcanizing device for vulcanizing tires and the like using upper and lower molds that can be opened and closed.

[For example, the vulcanizing equipment mentioned above was
The one described in Japanese Patent No. 8-153025 is known. This product consists of a fixed lower mold provided on the frame, a movable upper mold supported by the frame above the fixed lower mold, an elevating slide mechanism that opens and closes both molds by raising and lowering the movable upper mold, and a movable upper mold. A hollow pressure member is attached to the top surface of the mold via an upper mold height adjustment mechanism, and a pressure member is attached to the frame and surrounds the outer periphery of the hollow pressure member and removably engages with the hollow pressure member. a device;
The elevating slide mechanism includes a male threaded shaft connected to the movable upper mold and fitted concentrically into the hollow pressure member, and a male threaded shaft that is screwed onto the male threaded shaft and rotated by a motor. It has a screw cylinder body that moves the shaft up and down.

Ku-. However, with such vulcanizing equipment, each time the upper and lower molds are replaced, the height of the upper mold must be adjusted using the upper mold height adjustment mechanism, and the rotation amount of the male screw shaft must be adjusted. . The reason for this is that the total height of the upper and lower molds differs depending on the type of mold, so if the height and rotation amount are not adjusted, there will be a gap between the upper and lower molds when the mold is closed. This is because if pressurization is applied in such a state, excessive force will be applied to the male threaded shaft, female threaded cylinder, motor, etc., resulting in damage to these. As a result, there is a problem that the work becomes complicated and the efficiency of one work is low.

These problems arise because the lower mold is fixed to the bottom of the frame, the soil is supported by the frame above the lower mold, and the upper and lower molds are opened and closed by raising and lowering the upper mold, which is attached to the frame. A cylinder, a column fixed to the upper surface of the upper mold and extending in the vertical direction, a pressurizing mechanism that is attached to a frame above the upper mold and penetrated by the column, and a pressurizing mechanism that operates when the upper and lower molds are closed to apply pressure. This problem can be solved by providing a transmission mechanism that can transmit the pressing force of the mechanism to the column.

January When vulcanizing a material to be vulcanized, for example, a green tire,
After the material to be vulcanized is carried between the upper and lower molds, the cylinder is operated to lower the upper mold and the upper and lower molds are closed.Next, the transmission mechanism is activated to push the pressure mechanism. 0 Next, the pressurizing mechanism is activated to transmit the pressing force to the upper mold through the column, and after the upper and lower molds are clamped, the object to be vulcanized is vulcanized. Next, when there is a change in the type of material to be vulcanized, the upper and lower molds are also replaced, but the total height of the upper and lower molds differs depending on the type of mold. Therefore, it may be necessary to adjust the height position of the upper mold. However, in this invention, since a cylinder is used to raise and lower the upper mold, by pressing the upper mold against the lower mold and stopping the operation of the cylinder, the difference in the total height is absorbed by the cylinder. This eliminates the need to adjust the height of the upper mold. As a result,
The height adjustment mechanism of the upper mold as in the prior art is not required, which simplifies the structure and improves work efficiency.

Isshiei 1 Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1, 2 and 3, 1 is a vulcanizing device having a frame 2, and a lower die 4 is detachably attached to the lower part of the frame 2 via a heating platen 3. An upper mold 5 is installed above the lower mold 4 to vulcanize a material to be vulcanized, such as a green tire, in cooperation with the lower mold 4, and this upper mold 5 is connected to a bolster 8 via a heating platen 7. It is removably attached. The upper mold 5 is supported by the frame 2 via a bolster 8 so as to be movable up and down.

8 is attached to the frame 2 on the outside of the upper mold 5. The piston rod 3 of the cylinder 8 protrudes or retracts when pressure oil is supplied to the cylinder 8. A bolster 6 is connected to the tip of the piston rod 9, whereby the upper mold 5, the bolster B, and the platen 7 are moved up and down as one by the operation of the cylinder 8, and the lower mold 4. Open and close upper yJ5. A vertical cylindrical column 11 is rotatably attached to the upper surface of the center portion of the upper die 5 via a platen 7 and a bolster 8. Also, upper y! ! A pressurizing cylinder 12 as a pressurizing mechanism is attached to the frame 2 above 15, and this pressurizing cylinder 12 has a through hole 13 extending in the vertical direction in the center thereof, and has a hollow shape as a whole. . Pressure cylinder 1
A ring claw 15 is formed at the tip of the piston rod 14 of No. 2 and projects inward, and the inner diameter of the ring claw 15 is slightly larger than the outer diameter of the column 11. It passes through the inside of the ring claw 15 and through the through hole 13. A plurality of (eight in this embodiment) slits 1B are formed on the inner periphery of the ring claw 15 at equal angles apart in the circumferential direction. On the other hand, a plurality of transmission pieces 17 corresponding to the slots 7) 16 are fixed to the outer periphery of the central portion of the column 11 at equal angles apart from each other in the circumferential direction. When the slit 1B and the transmission piece 17 overlap in the vertical direction, these transmission pieces 17 can pass through the slit 7) 111 and move (up and down) in the axial direction.
It is a substantially horizontal cylinder fixed to the upper surface, and the tip of the piston rod lθ of this cylinder 18 is connected to the outer periphery of the lower end of the column 11.

As a result, when the cylinder is operated, the column 11 rotates by a predetermined angle around the vertical axis, and the transmission piece 17 and the slide 7)
G, or the transmission piece 17 and the ring claw 15 are made to overlap each other in the vertical direction. When the transmission piece 17 and the ring claw 15 overlap each other, the pressing force of the pressure cylinder 12 is applied to the ring claw 15. The transmission piece 17 can be transmitted to the upper die 5 via the column 11. Ring claw 1 mentioned above
5. The slit 1B, the transmission piece 17, and the cylinder 18 operate as a whole when the upper and lower molds 5 and 4 are closed, and can transmit the pressing force of the pressure cylinder 12 to the upper mold 5 via the column 11. A transmission mechanism 20 is configured. 2G and 27 are supply and discharge passages for supplying and discharging pressure oil to the upper chamber 28 and lower chamber 29 of the pressurizing cylinder 12, respectively, and these supply and discharge passages 2B and 27
A switching valve 30 for switching the flow direction of the pressure oil is provided in the middle. Further, a pressure sensor 31 for detecting the internal pressure of the supply/discharge passage 26 is connected to the supply/discharge passage 2B. When the temperature rises above a predetermined value, a detection signal is sent to the controller 32. An intermediate rod 33 is supported by the frame 2 and moves integrally with the piston rod 14, and the height position of the intermediate rod 33, that is, the position of the piston rod 14 is constantly detected by the position sensor 34. Then, when the detection signal from the pressure sensor 31 is input, the controller 32 determines the position of the piston rod 14 at the time of this input;
That is, the value of the position signal from the position sensor 34 is stored as a virtual origin P as shown in FIG. When this happens, a signal is sent to the switching valve 30 to switch the switching valve 30 to the neutral position and pressurize cylinder 1.
Stop the operation of 2.

Next, the operation of one embodiment of the present invention will be explained.

After the vulcanization of the type A material to be vulcanized is completed, the type A
When vulcanizing a material to be vulcanized of type B, which is different from
First, the switching valve 3o is switched to supply pressure oil to the lower chamber 28,
After the piston rod 14 is raised to the upper limit, the cylinder 1B is actuated to, for example, protrude the piston rod 19 and the column 11 is rotated by a predetermined angle. This results in
The transmission piece 17 that was vertically overlapping with the ring claw 15 is
When the cylinder 8 is actuated to cause the piston rod 9 to protrude, the cylinder 8 is vertically overlapped with the slit 18.
The upper mold 5 rises together with the column 11. At this time, since the transmission piece 17 passes through the inside of the slit 16, the upward movement of the column 11 is not restricted. When the upper die 5 moves to the upward limit and stops as shown in the right half of FIG. Upper mold 5.
The lower mold 4 and, if necessary, the platens 3 and 7 are replaced with those of type B. Here, since the total height of the upper and lower molds 5 and 4 differs depending on the type of mold, if the upper mold 5 is lowered by the same distance as the above-mentioned rising distance, the height between the upper and lower molds 5 and 4 will be A gap may occur, or the upper and lower dies 5.4 may come into contact with each other during their descent, and an excessive repulsive force will act on the mechanism for raising and lowering the upper and lower dies 5.4. However, in this invention, the cylinder 8, which can be stopped at any stroke position where the upper die 5 comes into contact with the lower die 4, is used for raising and lowering the upper die 5, so the amount of protrusion of the piston rod 8 may change. can absorb the change in the total height of the upper and lower molds 5.4, which eliminates the need for adjustment work associated with replacing the upper and lower molds 5.4. , lower mold 5
, 4, the piston rod 9 of the cylinder 8 is retracted and the upper mold 5 is lowered until it comes into contact with the lower mold 4, and the upper and lower molds 5 and 4 are closed. , the piston rod 19 of the cylinder 18 is retracted, the column 11 is rotated, and the transmission piece 17 and the ring claw 15 are overlapped vertically.Next, the switching valve 30 is switched to supply pressure oil to the upper chamber 28. , the piston rod 14 of the pressurizing cylinder 12 is lowered. As a result, the ring claw 15 comes into contact with the transmission piece 17 and the pressing force of the pressure cylinder 12 is transmitted to the upper mold 5, and the upper and lower molds 5.4 are clamped. 5
, 4 abut against each other and the column 11 cannot be lowered any further, so the internal pressures of the supply/discharge passage 2B and the upper chamber 2B rise to a predetermined value or higher. When the internal pressure rises above a predetermined value in this way, the pressure sensor 31 detects this and sends a detection signal to the controller 32. On the other hand, the height position of the piston rod 14 is constantly detected by a position sensor 34 via the intermediate rod 33, and a position signal is sent from this position sensor 34 to the controller 32.
is being sent to. When the detection signal is input to the controller 32, the controller 32 stores the height position of the piston rod 14 as a virtual origin P, as shown in FIG.
Specifically, the value of the position signal from the position sensor 34 at the time when the detection signal is input is stored. When the upper and lower molds 5 and 4 are clamped in this way, the object to be vulcanized is vulcanized. Next, when the vulcanization is completed, the switching valve 30 is switched to supply pressure oil to the lower chamber 28. When the piston rod 14 rises from the virtual origin P by a minute distance S1, for example, about 101I11, and reaches the standby position Q, the controller 32 uses the position signal from the position sensor 34 to raise the piston rod 14. The switching valve 30 is switched to stop the lifting of the piston rod 14.Next, after rotating the column 11 by the cylinder 18, the upper mold 5 is raised to the upper limit by the cylinder 8, and the vulcanized material is removed. 0 Next, after carrying in the unvulcanized material to be vulcanized, do the same as above and move it up and down! ! 5.4 is closed, the mold is clamped, and vulcanization is performed.Here, in this embodiment, as described above, the pressure sensor 31 that detects the internal pressure of the pressure cylinder 12 and the position of the piston rod 14 of the pressure cylinder 12 are a position sensor 34 that detects the
When the internal pressure of the pressurizing cylinder 12 rises above a predetermined value,
A controller 32 is provided that stores the position of the piston rod 14 of the pressurizing cylinder 12 as a virtual origin P based on signals from the pressure sensor 31 and the position sensor 34, and after vulcanization is completed, the piston of the pressurizing cylinder 12 is moved. Since the rod 14 is raised to a standby position Q that is a predetermined minute distance S away from the virtual origin P, it is only necessary to determine the virtual origin P once every time the first base is replaced, and the subsequent vulcanization will be easy. The reciprocating stroke of the piston rod 14 of the pressurizing cylinder 12 can be kept within a constant minute distance at all times, and production efficiency can be dramatically improved.

Circle 1 As explained above, according to the present invention, when the molds are replaced, the difference in the total height of the molds can be absorbed by the cylinder, which simplifies the overall structure of the device. 1
Work efficiency will also improve.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of this invention. A partially cutaway front view with the left half showing the mold closed state and the right half showing the mold open state.
2 is a sectional view taken along the line II in FIG. 1, and FIG. 3 is a sectional view taken along the line II--■ in FIG. - 1... Vulcanizing device 2... Frame 4...
Lower die 5...Upper die...Cylinder 11...
...Column 12...Pressure mechanism 20...Transmission mechanism Patent applicant Brideston Co., Ltd. Agent Patent attorney Ta 1) Toshihito 2 Figure 3

Claims (1)

[Claims] A lower mold fixed to the bottom of the frame, an upper mold supported by the frame above the lower mold, a cylinder attached to the frame that opens and closes the upper and lower molds by raising and lowering the upper mold, and the upper surface of the upper mold. a column that is fixed to the frame and extends vertically; a pressurizing mechanism that is attached to the frame above the upper die and through which the column passes; and a pressurizing mechanism that operates when the upper and lower dies are closed and applies the pressing force of the pressurizing mechanism to the column. A vulcanizing device comprising a transmission mechanism that enables transmission.