JPH08395B2 - Processing method for flexible long workpieces - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a flexible long workpiece such as a weather strip of an automobile.

[0002]

2. Description of the Related Art A method for processing a flexible long work is disclosed, for example, in JP-A-3-43199.

As shown in FIG. 7, a marking device 2 marks a different surface of a work 1 to be extruded, a marking sensor 3 detects the mark, and a tape applying machine 4 applies a double-sided tape. ,Also,
Marks on the other surface are detected by the marking sensor 5, a double-sided tape is applied by the tape applying machine 6, the marks are detected by the marking sensor 7, the holes are punched by the punching machine 8, and the work 1 is cut by the cutting machine 9. It is a thing.

In this processing method, the length of the work 1 is measured by an encoder, and when the count of the encoder reaches a predetermined value, the tape sticking, punching and cutting are performed.

[0005]

By the way, the above-mentioned work 1, for example, a soft work 1 formed by a long extrusion process such as a weather strip is shrunk after being extruded due to its nature, so that the setting of the encoder is performed. value is,
The amount of shrinkage is taken into consideration when making the decision.

However, the shrinkage amount of the work 1 varies depending on the sectional shape of the work 1. For example, when the shrinkage amount is small, there is a problem that the work 1 needs to be cut in a subsequent process.

Particularly, since the work length is measured by the encoder, the amount of shrinkage is small because the slip of the roller portion or the slip ratio changes due to the size of the work cross-section, or the work 1 is made of soft rubber. Easy to vary.

[0008] Therefore, the present invention is to provide a method for processing a softness elongate workpieces even if there are variations in the shrinkage observed amount can be obtained the product of a desired length.

[0009]

In softness SUMMARY OF THE INVENTION by extruding workpiece long cooling after vulcanization, given a plurality of marks at a constant pitch in the subsequent work surface in the traveling direction of the workpiece, further
Then , the number of marks in the reference length after detecting this mark
And the aptitude value are compared, and the amount of shrinkage of the work from the comparison result.
And perform post-processing based on the judgment result.
To correct.

[0010]

[Function] The degree of shrinkage of the work is the number of marks in the reference length.
In real time by comparing
After that, the post-processing is corrected at any time and accurately performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1, a work W having a predetermined sectional shape extruded by an extruder 10 is vulcanized in a vulcanization tank 11, passes through a transaction machine 12, and is cooled by a cooling tank 13.

Although the work W tends to shrink with time after being extruded, it is roughly known how much the work W shrinks from the extruder 10 to the cooling tank 13.

Then, the work W is drawn in by the transfer roller 14 after the cooling tank 13.

In the transfer roller 14, as shown in FIG. 2, the work W held between the drive roller 15 and the lower gear-shaped free roller 16 is pulled out in a later step. A water-soluble fluorescent paint 18 is accommodated in a tank 17 disposed below, and the fluorescent paint 18 adheres to the mountain portion 16a of the free roller 16 and is attached to the lower surface of the work W in the traveling direction of the work W. A plurality of linear marks 19 are attached at a pitch.

In this manner, the work W marked with the mark 19 as shown in FIG. 3 is clamped by the pair of rollers 21 rotated by the pulse counter 20 as shown in FIG. The mark 19 is detected by the mark sensor 22 directed upward.

The mark 19 thus detected is shown in FIG.
As shown in FIG. 5, the reference length L is compared with an appropriate value depending on how many there are. For example, in FIG.
The number of the marks 19 is smaller than that in the middle (B), and thus the shrinkage amount is small.

As described above, since it is possible to determine how much the work W has a normal shrinkage amount from the initial extrusion to the position of the pulse counter 20, the work W to be cut in the post-processing can be determined. The length or various dimensions can be determined.

Therefore, since the error of the shrinkage amount can be measured in real time by the measurement result obtained by the pulse counter 20, when the shrinkage amount is large, the mark 19 of the work W is corrected by taking a lot of marks 19. It is possible to freely deal with the variation in the shrinkage amount of the work W by cutting the workpiece.

The present invention is not limited to the above-described embodiment. For example, the mark 19 attached to the work W may have a partially enlarged thickness as shown in FIG. You may make it use the thing.

The solvent used for the transfer roller 14 is readable, and any solvent may be used as long as it does not easily disappear, and the mark sensor 22 may be of various types such as an infrared type.

[0022]

As described above, according to the present invention, the shrinkage amount of the work can be confirmed in real time, and the result can be confirmed.
In order to correct the post-processing based on
Regardless of variations, cutting and hole processing in post processing are always accurate
There is an effect that can be done. Also, in post processing
Always cuts workpieces regardless of the amount of shrinkage
Since it can be performed at any length,
There is no need to cut the workpieces, and there is less material loss.
There is also an advantage that

[Brief description of drawings]

FIG. 1 is a process drawing of an embodiment of the present invention.

FIG. 2 is a perspective view of the transfer unit.

FIG. 3 is a perspective view of a work with the same mark.

FIG. 4 is a perspective view of the detection portion.

FIG. 5 is a comparative explanatory diagram of a mark portion of the same work.

FIG. 6 is a perspective view of a work according to another embodiment.

FIG. 7 is a process diagram of a conventional technique.

[Explanation of symbols]

 19 ... Mark, W ... work.

Claims (1)

[Claims] 1. A flexible and long work is extruded, vulcanized and cooled, and then a plurality of marks are attached to the work surface at equal pitches in the traveling direction of the work, and then the marks are detected. Compare the number of marks in the standard length with the appropriate value
When comparing the amount of shrinkage of the work from the comparison result,
In addition, the post-processing should be corrected based on the judgment result.
A method for processing a flexible long workpiece, which is characterized in that