JPS58134727A - Bending processor for core metal-inserted extruded molding - Google Patents

Abstract

PURPOSE:To obtain a bending processor capable of bending an extruded molding to an almost desired bending angle by means of one-stage paired bending rolls by a method in which a core metal-inserted extruded molding is introduced to the geared part between a concave roll and a convex roll and the opening angle of the groove of the concave roll and the diameter of the roll are set up to specific values. CONSTITUTION:A pair of concave roll 17 and convex roll 15 is pivotally supported on a supporting wall 18 in such a way as to form a geared part before and behind. The opening angle (alpha) of the groove of the concave roll 17 is matched with the bonding angle of an extruded molding 4, and the diameter of the roll 17 is set up to more than 40 times the depth of the groove, preferably to more than 50 times, whereby preventing the occurrence of flaws in the rubber part and the exposure of the core metal 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus used for bending an extruded product containing a cored metal into a U-shape.

Here, as an extruded product with a cored metal, as shown in Figure 1,
In a weather strip q consisting of a hollow seal part l and a grip part 3 in which a core metal is embedded, an example will be explained in which the grip part 3 is bent into a U-shape as shown by a two-dot chain line. It is not limited to.

A conventional bending device of this kind has a multi-stage (for example, six stages) arrangement of bending roll pairs each consisting of a convex roll that supports the inner central part of the gripping part 3 in the bending direction and a concave roll that regulates the bending angle from the outside. It was something. For this reason, the equipment cost of the bending device was high, and adjustments such as centering of the pair of bending rolls were troublesome, resulting in poor productivity. The reason why pairs of bending rolls are provided in multiple stages is that if the bending rolls are passed between pairs of bending rolls that have a large bending angle from the beginning, the pressure will be concentrated in the extremely narrow part of the weatherstrip, causing scratches on the rubber part and damage to the core metal. This is because problems such as exposure are likely to occur.

In view of the above, it is an object of the present invention to provide an apparatus for bending an extruded product containing a cored metal, which is capable of bending an extruded product to a substantially required bending angle using a single pair of bending rolls.

The bending device 6 for extruded products with a cored metal according to the present invention is arranged so that a pair of concave rolls and a convex roll are driven to form an interlocking part, and the opening of the groove of the concave roll is set to a bending angle of 111 fl degrees. The roll diameter is 40 times or more than the groove depth, and the extrusion M△72 with cored metal is installed in the meshing part. A plant to which the bending apparatus of the present invention is applied will be explained based on illustrated examples.

As shown in FIGS. 2 and 3, the speed controller S1 bends the bending device 6, and the bending shoulder corner straightening device straightens the plane! ! ! 7 and a take-up device are arranged on the frame 9 in order from the front to the rear in the flow direction of the extruded product (weather strip).

F speed control device j is connected to sagging detection roll /-, detects the amount of sagging of weather strip q by the inclination of arm /3, and detects the amount of sagging of weather strip q by the inclination of arm /3, A control signal is manually input to the control section of each drive device so that the rotational speed of the weather stripper and lq is synchronized with the extrusion speed of the weather stripper.

The bending device includes a pair of concave rolls 17 and a convex roll/
S is pivotally supported on the front and rear support walls so as to form an engaging portion. At this time, the opening angle α of the groove/7a of the four rolls/7 corresponds to the bending corner storage of the extruded product, and the roll diameter is at least IIO times the groove depth, preferably at least 50 times (the fourth (see figure). For example, when the groove depth is 10n, the roll diameter is set to be q00'u or more. Naturally, convex roll / 3
(1) The roller diameter is also approximately the same as that of the concave roll/7. If it is less than 110 times, the pressure during bending will be excessive)
1, 4th Z-5 Concentrates on the narrow part of the IJ knob and may cause problems such as scratches on the rubber part and exposure of the core metal.
As shown in the figure, the eccentric shut/6 (span 11) in which the four rolls 17 are rotatably held has a cylinder rod connected to the disk 21 and a cylinder rod at the span 2 position on the outer periphery of the disk 21. 22, equipped with a cylinder': That is, the clearance between the concave roll /7 and the convex roll 11S at the meshing part is set to the supporting wall / r + T U
It can be adjusted by using the spacer 2d, which is Q. Further, the convex roll lj is connected to an output shaft of a continuously variable transmission 2B connected to a motor 25, and is driven to rotate. In addition, in order to introduce the weather strip l to the meshing part, the concave roll 17 and the convex roll lS are connected from the bottom position of the concave roll /7.
A guide block 19 consisting of a pair of left and right L-shaped blocks that surrounds the engagement portion with the guide block 19 is disposed. This guide block 19 has nozzles 27, 2g,
29, each can be moved back and forth, left and right, and up and down via a rack and pinion mechanism. Furthermore, the concave roll /7
In order to introduce a weather strip between the guide block 19 and the guide block 19, a folding block 20 having a shape as shown in FIG. 6 is disposed immediately in front of the guide block 19.

Note that this folding block 20 is not necessary if the weather strip does not have a hollow seal part.

As shown in FIG. 7, the bending shoulder angle loosening device 7 includes a pair of presser feet each having a collar J'Oa that presses the shoulder of the weatherstrip S that has been bent to a required angle. and the inside of the weather strip
and a support roll 3/ for supporting the weatherstrip q, which plays the role of angulating the shoulder portion of the weatherstrip q that has passed through the bending device 6. Further, the support roll 31 is connected to a drive device 32 of the take-up device so that it can be driven and rotated. In addition,
This bending shoulder angle loosening device 7 does not require koji since it is not necessary to square the shoulder of the weather stripper.

The take-up device g has a pair of grooved rolls l<z+ /4(
And the grooved roll/4! , /44 guide plate 3 to be introduced while crushing the hollow seal part of the weather strip.
It consists of 3.

Next, the manner of use of the above embodiment will be explained.

(The grip part 3 extruded from the extrusion device is in a straight state) The IJ tube q is moved from the sag detection roll /2 of the speed control device S to the tilting of the bending device B, as shown by the two-dot chain line in Figs. Including block 20 and guide block 1
9 and concave roll 17 (1) After passing through IIR, concave roll/7
It reaches the meshing part 6- with the convex roll /3, and then passes through the bending shoulder angle loosening device 7 and is taken up by the take-up device w1g.

Here, the speed control device S controls the convex roll 15 of the bending device B and the grooved roll of the take-up device B/! , /
The rotation speed of 17 is synchronized with the extrusion speed of the weather strip q, and the elongation of the weather strip q is prevented. In addition, as shown in Fig. g, the hollow seal part 1 is at the meshing part between the concave roll 7 and the convex roll 1S of the 9-surface strip qI/i, which is tilted to one side, and the concave roll 17 is rotated by the rotation of the eccentric shaft /B. As a result, the weather strip q is attracted to the convex roll /S that rotates and conveys the weather strip q. At this time, the pressing force of the concave roll/7 against the weather strip t is the span 11 of the disk/span 1 of the eccentric shaft! Since the holding force is greater than the force of the cylinder rod 22 and is rotated, the weatherstrip can be stably bent. Four Roni! The clearance between the 5 roll 17 and the convex roll 3 is adjusted by the spacer 21I as described above, and the bending shape of the weather stripper is adjusted by the spacer 2.
It can be made arbitrary by changing q.

Also, the roll diameter of concave roll/7 is tIO times or more of the groove depth]
Even if the bending angle is large from the beginning, the bending force applied to the weatherstrip is distributed over a wide range, which causes scratches on the rubber part as in the conventional case. E: Almost no problems such as exposure of gold occur.・ Is this how it was bent? The Ezastrip passes through a bending shoulder angle breaking device, and as shown in No. 7-, the fr1 portion of the gripping portion 3 is squared due to the three-point support of the flange portions 30B-, 30:I of the pressing roll and the support roll 31. It becomes a shape.

At the time of rotation, the support roll 3/ is driven and rotated, and the convex roll/
It also acts to remove the weather strip q from being bitten by the weather strip q. This weather strip with angular shoulders,
A grooved roll whose hollow seal part is crushed by a guide plate 33 and is driven to rotate/11. /, taken over between das, and further delivered to the product storage area.・In addition, in the embodiment mentioned above, the arrangement of the four rolls and the convex rolls of the bending device may be forward and backward movement, or may be installed horizontally. The bending device of the present invention, in which the strip may be introduced from the L side into the meshing area between the concave roll and the convex roll, bends the extruded product to approximately the required bending angle using a single pair of bending rolls. Therefore, the number of stages of the bending roll pairs can be reduced, equipment costs are reduced, and centering between the bending roll pairs becomes easier, improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of an extruded product containing a cored metal, Fig. 2 is a schematic partial cross-sectional plan view of a plant to which the bending device of the present invention is applied, Fig. 3 is a schematic front view, and Fig. Main part sectional view showing the crank mechanism in the bending device, No. 5
The figure is also a partial plan view, Figure 6 is a perspective view of the folding block, Figure 7 is a side sectional view of the bending shoulder corner loosening device, and Figure g is the meshing part of the concave roll and convex roll of the bending device. FIG. 3 is a partial cross-sectional view showing a state in which a weather strip has been introduced. 9-/Hollow seal part, 2..., core metal, 3-grip part, q
...Weather strip (extruded product), 6/Bending JJI+
”2 g1, /s...convex roll, 16...eccentric shear/), /7...concave roll, /9...guide block, 20...tilting block 1.2/...・Disc":
22... Cylinder rod 0 Patent applicant - 10 = Figure 4 Figure 5

Claims (1)

[Claims] This device is used for bending an extruded product containing a cored metal into a U-shape, in which a pair of concave rolls and a convex roll are driven to form an interlocking part, and the opening of the groove of the concave roll is An extruded product with a cored metal, the angle of which corresponds to the bending angle, the diameter of the roll is 110 times or more the depth of the groove, and a guide block for introducing the extruded product with a cored metal is arranged in the meshing portion. bending equipment.