JPH06226842A - Device for processing extrusion molding - Google Patents

Abstract

PURPOSE:To achieve the enhancement of processing work efficiency and the reduction of cost while ensuring the universality of the bent shape of a lip part. CONSTITUTION:The sizing machine 22 arranged on the just downstream side of an extrusion molding machine is provided so as to freely advance and retreat in the direction of the guide hole 24 of a main body 23 and constituted of a movable member 25 applying bending processing to the lip part 21 of a molded object 20a by the processing surface thereof and a control mechanism 27 controlling the advance and retreat of the movable member 25 and the advance and retreat quantity thereof on the basis of the extrusion distance of the molded object 20a detected by a displacement sensor 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for processing an extruded product, which is an extruded product, for example, a part of a weather strip for an automobile, which is bent and deformed by a sizing machine.

[0002]

2. Description of the Related Art As is well known, a weather strip to be attached to a door opening edge of a vehicle body is generally formed by bending a lip portion by a sizing machine after extrusion molding according to the attachment position.

That is, as shown in FIGS. 6 to 8, a weather strip 2 attached to a door opening edge of a vehicle body 1 is integrally formed by extrusion molding and has a U-shaped attachment base 3.
And a lip portion 4 which is provided on the outer surface of the one side piece 3a on the vehicle interior side of the mounting base 3 so as to conceal the ceiling garnish 5 and the pillar garnish 6 on the vehicle interior side.

To mold the weather strip 2, as shown in FIG. 9, solid rubber is first extruded from the mouthpiece 9 together with the core metal 8 by the extrusion molding machine 7, and the mounting base 3 as shown in FIG. The lip portion 4 is bent in a letter shape and forms a flat plate-shaped molded body 2a. Immediately after that, that is, at a time when it is still in the plastic state, the sizing machine 10 bends the lip portion 4 toward the one side piece 3a on the vehicle interior side at a predetermined bending angle θ1 as shown in FIG. Subsequently, the molded body 2 a is passed through the water tank 11 to be cooled and solidified, and the take-up machine 12
Then, the attachment base 3 is bent into a substantially U shape by the bender machine 13 as shown in FIG. 12, and then cut by the cutting machine 14 into a predetermined length, so that the weather strip 2 having a desired length can be obtained. It has become.

By the way, the bending angle θ1 of the lip portion 4 is
Is a member concealed by the lip portion 4, for example, a ceiling garnish 5 or a pillar garnish 6 as shown in FIG.
It is desirable to change the angle according to the tilt angle.

[0006]

However, in the conventional sizing machine 10 described above, since the processing surface for bending the lip portion 4 is fixed to a fixed shape, the lip portion 4 is fixed.
The bending angle θ1 becomes the same as the whole. Therefore, when such a bending angle θ1 is set to a relatively small angle so as to conceal the ceiling garnish 5 on the roof 1a side in the optimum state as shown by the solid line in FIG. 7, the lip portion 4 on the center pillar 1b side is As shown by the alternate long and short dash line in FIG. 8, the lip 4 is pushed outward (inward in the vehicle) at the end of the pillar garnish 6, and the mounting base 3 also tilts inward as indicated by the alternate long and short dash line. Will end up. On the other hand, when the bending angle is set to be relatively large in accordance with the angle of the pillar garnish 6, the lip portion 4 on the roof 1a side is separated from the end portion of the ceiling garnish 5 as shown by the one-dot chain line in FIG. There is a fear that a gap will occur. As a result, the appearance inside the vehicle is deteriorated and the appearance quality is deteriorated.

Therefore, the weather strip 2 is attached to the roof 1
It is also conceivable to separate the a side and the center pillar 1b side, bend each lip portion with a sizing machine having a different processing surface shape, and then join each weather strip, but in this case, the weather strip Since each must be molded separately, not only the molding work becomes complicated, but also the sizing machine etc. must be installed separately,
A huge rise in equipment costs is inevitable.

[0008]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned conventional circumstances, and provides a processing device for bending and deforming a lip portion of an extruded molded body into a predetermined shape by a sizing machine. The sizing machine is provided with a main body having a guide hole for guiding and holding the molded body drawn inside, and a sizing machine that is movable back and forth in the direction of the guide hole, and bends the lip portion of the molded body at the inner end surface. A movable member,
A control mechanism for controlling the amount of advance / retreat of the movable member based on an information signal from a detector that detects the extrusion distance of the molded body.

[0009]

According to the present invention having the above-mentioned structure, the push-out distance of the weather strip, which is an extrusion-molded body, is detected by the detector, and the control mechanism controls the advancing / retreating of the movable member in the guide hole direction based on the information signal. Let Therefore, the machined surface moves back and forth, and the bending inclination angle of the lip portion can be freely changed.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a sizing machine 22 used in the apparatus for processing an extrusion-molded article according to the present invention. The sizing machine 22 is immediately after being extruded from an extrusion molding machine similar to the conventional one and is cooled in a water tank. And is applied to the weather strip 20 attached to the opening edge of the vehicle body as a molded product as described above.

That is, the sizing machine 22 is provided with a main body 23 having a guide hole 24 for guiding and holding the extruded molded body 20a and a centrally arranged main body 23 so as to be movable back and forth in the direction of the guide hole 24. Movable member 25,
It is mainly composed of a control mechanism 27 that moves the movable member 25 forward and backward based on an information signal from a displacement sensor 26 that detects the extrusion distance of the molded body 20a.

The main body 23 has a substantially rectangular shape in plan view and is composed of a substrate 28 and a holding plate 29 fixed to one side portion of the substrate 28. The substrate 28 has a substantially rectangular block on the other side portion. A guide groove 2 having a portion 28a and a concave shape on the upper surface.
8b is formed along the longitudinal direction. On the other hand, the holding plate 29 has a flat plate shape, is provided in parallel with the upper portion of the substrate 28, and has a step groove 29a on the lower surface which cooperates with the guide groove 28b to form the guide hole 24 along the longitudinal direction. Is formed. The bottom surface of the guide groove 28b is a curved surface 28c formed in a substantially curved shape gradually upward from the inlet side to the center side of the molded body 20a.

As shown in FIGS. 2 and 3, the movable member 25 has a holding groove 28 which is provided substantially at the center of the block portion 28a.
It is arranged inside the guide groove 24d of the base plate 28 and slides on the bottom surface 28e of the guide groove of the base plate 28.
It is formed in an arc surface shape continuous with c. Further, a drive rod 30 is connected to a rear end portion of the movable member 25 opposite to the processed surface 25a.

The control mechanism 27 includes the drive rod 30.
A servo motor 31 for moving the movable member 25 forward and backward horizontally in the holding groove 28d via a motor, and a built-in microcomputer for driving and controlling the servo motor 31 based on the information signal of the extrusion distance output from the displacement sensor 26. And a control unit 32. Further, the displacement sensor 26 has a U-shape, and detects the extrusion distance of the molded body 20a passing through the inside through a laser beam.

Therefore, according to this embodiment, the molded body 20a extruded from the extrusion molding machine is first displaced by the displacement sensor 2.
When passing 6, the extrusion distance is detected, and the sizing machine 22 is inserted and moved through the guide hole 24. At this time, if the extruded part of the molded body 20a is a part attached to the center pillar side, as shown in FIG.
5 is held in the original position, and the lip portion 21 has a curved surface 28c.
When it slides along the processing surface 25a, it is bent at a predetermined position. After that, when the extruded part of the molded body 20a becomes a part on the roof side, the control unit 32 outputs a drive signal to the servo motor 31 according to the measured value based on the output signal from the displacement sensor 26 that detects the extruded part on the roof side. To do. Therefore, the movable member 25 moves forward by a predetermined amount by the servo motor 31 via the drive rod 30. Therefore, the lip portion 21 of the molded body 20a is
As shown in FIG. 3, the front end gradually comes closer to the vehicle inner side piece 20b along the advanced working surface 25a. After that, the molded body 20a is cooled and solidified in the water tank, and then the mounting base 20b is bent into a substantially U shape by a bender machine.
Then, it is cut to a predetermined length, and as a result, a predetermined weather strip 20 having different bending positions in the longitudinal direction of the lip portion 21 is formed as shown in FIG.

As described above, since the bending position of the lip portion 21 can be arbitrarily and continuously changed by one sizing machine 22, the ceiling garnish and the pillar garnish can be hidden surely and optimally, and the interior of the vehicle can be hidden. The deterioration of the appearance can be prevented, and it is not necessary to separately form and combine weather strips having different cross-sectional shapes as in the conventional case, and the molding can be performed in one extrusion step, so that the molding operation is extremely easy. Not only that, but the equipment cost can be drastically reduced.

FIG. 5 shows an automatic cutter machine 40 for the lip portion 21 used in this embodiment. That is, since the weather strip 20 does not require the lip portion 21 on the lower end side of the opening edge of the vehicle body, generally, after molding, an unnecessary portion is cut off by a predetermined manual cutter. Cutting in each step in the process causes a decrease in molding work efficiency.

Therefore, the automatic cutter 40 is arranged on the front end side of the die 41 of the extruder. In this automatic cutter machine 40, a cutting blade 42 is movably arranged at a position where a lip portion 21 of a mouthpiece 41 is formed, and the cutting blade 42 is moved by a servomotor 43 to the control unit 32.
It is designed to move back and forth.

Therefore, when the portion attached to the lower end side of the opening edge of the vehicle body is pushed out from the mouthpiece 41 on the basis of the signal output from the displacement sensor 26, the servo motor 43 is output by the output signal from the control unit 32.
Drive to advance the cutting blade 42 to the lip portion forming portion of the die 41. Therefore, the lip portion 21 of the molded body 20a is cut off by the cutting blade 42 with the pushing force. After that, when moving to the roof side or the pillar side, the servo motor 4
The cutting blade 42 moves backward via 3 to stop the cutting work. After that, the bending of the lip portion 21 by the sizing machine 22 as described above is continuously performed.

As described above, since the lip portion 21 can be automatically cut by the cutting blade 42 during extrusion molding, the cutting work efficiency can be improved. Moreover, the cutting amount is the cutting blade 42 by the control unit 32.
The sizing machine 22 can be set freely by controlling the amount of advance of the sizing machine and the cutting shape can be arbitrarily set.
In combination with the flexibility of the bending position of the lip portion 21 due to, it becomes possible to form various lip portions 21 having different protruding amounts and bending shapes. Reference numeral 44 in the drawing denotes a graining roller.

The present invention is not limited to the structure of the above embodiment, but can be applied to other weather strips having different cross-sectional shapes. An encoder or the like may be used as the detector that detects the extrusion distance.

[0023]

As is apparent from the above description, according to the apparatus for processing an extrusion-molded body according to the present invention, the control mechanism causes the movable member to move based on the information signal from the detector which detects the extrusion distance of the molding. By moving back and forth, the bending position of the lip portion of the molded body that passes through the guide hole can be changed automatically and freely, so that the lip portion can be formed into an optimal bending shape according to the mounting position of the molded body. Of course, it is possible to freely change the bending position of the lip portion with one sizing machine and one extrusion process, so that the molding work efficiency can be improved and the equipment cost can be improved. The cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sizing machine used in an embodiment of the present invention.

FIG. 2 is an AA of FIG. 1 showing an operating state of the sizing machine.
FIG.

FIG. 3 is a cross-sectional view taken along line AA of FIG. 1 showing different operating states of the sizing machine.

FIG. 4 is a perspective view of a weather strip used in this embodiment.

FIG. 5 is a perspective view showing an automatic cutter machine used in this embodiment.

FIG. 6 is a side view of a vehicle body to which the weather strip of this embodiment is attached.

7 is a sectional view taken along line BB of FIG.

8 is a cross-sectional view taken along the line CC of FIG.

FIG. 9 is a schematic view showing a processing device for a weather strip.

FIG. 10 is a cross-sectional view of a molded body immediately after being molded by an extruder.

FIG. 11 is a cross-sectional view of the molded body after passing through a conventional sizing machine.

FIG. 12 is a cross-sectional view of the molded body after passing through the ventilator.

[Explanation of symbols]

 20 ... Weather strip 20a ... Molded body 21 ... Lip part 22 ... Sizing machine 24 ... Guide hole 25 ... Movable member 25a ... Processing surface (inner end surface) 26 ... Displacement sensor (detector) 27 ... Control mechanism

Claims (1)

[Claims] 1. A processing apparatus in which a lip portion of an extrusion-molded body is bent and deformed into a predetermined shape by a sizing machine, the sizing machine having a guide hole for guiding and holding the molded body drawn therein. A movable member that is movable back and forth in the guide hole direction and bends the lip portion of the molded body at the inner end surface, and a detector that detects the extrusion distance of the molded body based on an information signal. An apparatus for processing an extruded body, comprising: a control mechanism that controls the amount of advance and retreat of the movable member.