JPH0584749A - Method for detecting displacement of position of mold of tire vulcanizing machine - Google Patents

Abstract

PURPOSE:To continuously measure the relative position of upper and lower molds during operation by attaching a displacement detector to the rising and falling upper mold to measure the displacement of the upper mold to the lower mold in a horizontal direction and counting a displacement abnormality signal showing that the detected value exceeds a tolerance value and generating an alarm when the count number reaches a predetermined number. CONSTITUTION:A displacement detector 12 is arranged on a guide bracket 3 and always detects the relation of the X- and Y-axis directions of a guide rail Z at the time of the rising/falling of an upper mold 8 to measure the positional relation with a lower mold 9. A comparison control part detects an abnormal state when an upper mold position displacement signal is shifted from a tolerance value within the position control and detection range at the time of the low speed falling operation of a press. This displacement abnormality signal is counted and, when the count number reaches a predetermined number, an alarm is emitted. By this constitution, the positional relation of the upper mold 8 to the lower mold 9 can be always grasped and the emission of the alarm due to a single abnormality signal can be excluded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a mold position displacement of a tire vulcanizer.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show the operation of a vertical tire vulcanizer. FIG. 4 shows the tire vulcanizer during vulcanization, and FIG. 5 shows the tire after vulcanization. The state where the vulcanizer is opened is shown. In the figure, 1 is a body frame, 2 is a guide rail, 3 is a guide bracket, 4 is a cam roller, 5 is a press lifting cylinder, 6 is a bolster plate and an upper platen, 7 is a lower platen, 8 is an upper mold, and 9 is a lower mold. It is a mold.

When the upper die 8 of the vertical tire vulcanizer is opened and closed, the guide rail 2 attached to the main body frame 1 by the cam roller 4 attached to the guide bracket 3 attached to the bolster plate 6 is used. For guidance,
This is performed by operating the press lifting cylinder 5. When vulcanizing the tire, it is important that the closing operation of the upper mold 8 is vertical and parallel to the lower mold 9 in a concentric state. The guide bracket 3 and the cam roller 4 are often adjusted so as to operate with respect to the lower mold 8. The lower platen 7 is mounted vertically to the guide rail 2 that guides the movement of the upper platen 6.

Further, as a method of checking whether or not this adjustment is accurately performed, as shown in FIG. 6, at an arbitrary position between the upper platen 6 and the lower platen 7 with the upper and lower molds 8 and 9 removed. The accuracy of shaving is regularly measured and confirmed. As a method of measuring the position accuracy, in FIG. 6, a measuring jig 10 is installed on the lower platen 7, and the relative position of the upper platen 6 is measured by a measuring instrument such as a dial gauge 11.

[0005]

The above-mentioned prior art has the following problems. In order to confirm whether the upper and lower molds continue to operate in the specified relative positional relationship, it is necessary to periodically stop production and measure and confirm the relative positional relationship between the upper and lower platens.

Although not shown, the bolster plate 6 is also equipped with a platen similar to the lower platen 7 via a heat insulating material, and the upper and lower platens are heated to 150 ° C. or higher. Therefore, in order to carry out the above-mentioned measurement work, it is necessary to wait until cooling, and the production interruption time is several hours, which is unproductive. In addition, since it is in a hot state when it is actually used, there is no way to know whether the adjustment value measured and adjusted in the cold is guaranteed.

It is an object of the present invention to propose a method for detecting the displacement of a mold position, which can continuously measure the relative positions of the upper and lower molds of a tire vulcanizer even during the operation of the machine.

[0008]

[Means for Solving the Problems] On a bolster plate 6 that moves up and down, the bolster plate 6 has a fixed positional relationship with a lower platen 7 and a lower mold 9 attached to a main body frame 1. A measuring instrument is attached to check whether it is operating, the positional displacement between the movable side and the fixed side is continuously detected, and when the displacement exceeds the allowable value, the need for readjustment is prompted.

In measuring the relative position, it is necessary to measure the relative position and the relative position of the upper and lower molds by associating the relative position with the control signal of the position control device for raising and lowering the upper mold. Displacement within the range is measured, an alarm is generated when the displacement exceeds the allowable value and the abnormal state continues N times or more, and the position control signal and the position displacement are related and detected. Good.

[0010]

When the upper mold is lowered toward the lower mold and the upper and lower molds are closed, the displacement detector attached to the upper mold measures the horizontal displacement of the upper mold with respect to the lower mold. This displacement measurement can be performed at all times, and the detection of an abnormal abnormality is excluded by counting the abnormality signal of the displacement detector.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. Members 1-9 are similar to the prior art (FIG. 4),
In the present invention, the displacement detector 12 for measuring the positional relationship between the upper mold 8 and the lower mold 9 when the upper mold 8 is moved up and down is installed in the guide bracket 3.
Install on top. FIG. 2 shows a displacement detector 12 for detecting the position of the upper die 8 and the bolster plate 6 with respect to the guide rail 2 which is vertically provided upright from the lower platen 7 during the ascending / descending operation.
Shows the mounting state of.

When the upper die 8 is moved up and down, the detector 12 constantly detects the relationship between the guide rail 2 and the X-axis and Y-axis directions. Further, in the ascending / descending operation of the upper mold 8, it is required that the upper mold 8 is operated in parallel with and vertically to the lower mold 9 in the low speed descending range in the closing operation of the press. That is, as shown in FIG. 3, the upper die position displacement signals in the range where the position of the upper die 8 with respect to the lower die 9 is required to be detected, that is, in the position control detection range during the low speed lowering operation of the press, are compared. An abnormal state is detected when the value deviates from a preset value of positional displacement set in the control unit.

Further, the comparison control unit receives a range setting signal (using a speed switching signal) from the position control device and uses it as the number of repetitive cycles in order to eliminate the alarm transmission due to a sporadic (abrupt) abnormal signal. Equipped with a counter function. That is, the alarm is issued only when the position displacement signal is repeatedly issued as an abnormal signal in the closing cycle of the press.

[0014]

According to the method of detecting the displacement of the mold position of the tire vulcanizer according to the present invention, the lower mold fixed to the lower part of the main body frame and the upper mold which is elevated by being guided by the vertical guide rails of the main body frame. In a tire vulcanizer having a mold, a displacement detector that detects a relative position with a guide rail is attached to the upper mold, and a displacement abnormal signal exceeding an allowable value from the displacement detector is counted, and the count number is Has the following effects by being configured to generate an alarm when a predetermined number has been reached. 1. By providing a position displacement detector on the movable side,
The state of the positional relationship between the lower mold and the upper mold can be always grasped. 2. By relating the control signal and the detection signal,
You can set the range of the required position for the correlation between the upper and lower molds. 3. By counting the number of repetitions of the abnormal signal from the detector, a sudden abnormal condition can be eliminated. 4. The measurement work for confirming the positional relationship between the upper and lower molds, which has been performed regularly in the past, is an adjustment work only when it deviates from the steady state.

[Brief description of drawings]

FIG. 1 is a front view of a tire vulcanizer embodying the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a control relationship diagram of a position signal of a press and a position displacement signal of an upper die.

FIG. 4 is a front view of a conventional tire vulcanizer when a mold is closed.

FIG. 5 is a view similar to FIG. 4 when the mold is opened.

FIG. 6 is a diagram showing a conventional method for measuring the positional relationship between upper and lower molds.

[Explanation of symbols]

 1 Main body frame 2 Guide rail 8 Upper mold 9 Lower mold 12 Displacement detector

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area B29L 30:00 4F

Claims (1)

[Claims] 1. A tire vulcanizer having a lower mold fixed to a lower portion of a main body frame and an upper mold that is elevated by being guided by a vertical guide rail of the main body frame, wherein the upper mold has a guide rail. A displacement detector for detecting the relative position of the displacement detector is attached, the displacement abnormality signal exceeding the allowable value from the displacement detector is counted, and an alarm is issued when the count reaches a predetermined number. A method for detecting displacement of a mold position of a tire vulcanizer.