JPH01269525A - Manufacturing device for weatherstrip - Google Patents

Abstract

PURPOSE:To form a cut section of optional shape with good design properties by sensing the transfer volume of a weatherstrip, comparing the current transfer volume based on a signal for said transfer volume with a preset transfer volume, outputting a drive control signal based on the comparison result to a cutting means and cutting. CONSTITUTION:A transfer volume sensing means 20 consisting of a roller 21 and a rotary encoder 23 is disposed in the vicinity of an extrusion outlet of a head 11. Linear transfer volume of the weatherstrip (w) is converted to the rotation volume of the rotary encoder, and a transfer volume signal corresponding to said rotation volume is output. Said transfer volume signal is put into a first control means 40. Said control means 40 compares the set transfer volume of the weatherstrip preliminarily input with the current transfer volume, based on which a drive control signal is output. A cutting means 50 is actuated by said drive control signal and so disposed as to clamp the weatherstrip. The weatherstrip is cut in a given position by means of a cutting blade 5 and a backing roller 55 based on the drive control signal. The transfer of the cutting blade can be controlled automatically by said arrangement to form a cutting section of optional shape.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a weatherstrip manufacturing apparatus. More specifically, the present invention relates to a weatherstrip manufacturing apparatus that partially cuts a part of a weatherstrip that has been extruded and is being moved in order to change the cross section of the weatherstrip.

The weather strip manufactured according to the present invention is suitable as a weather strip for vehicle window frames, luggage, sunroofs, etc., and is attached to the hollow seal portion 1 (see Fig. 9), lip portion 3 and A cut portion is formed in the seal lip portion 5 and the like to prevent interference with other members.

<Prior Art> Conventionally, in order to form cut portions on weatherstrips, the weatherstrips are formed once for each length of the product, and then
A method of cutting the predetermined portion using a die or the like has been adopted. However, this method does not allow continuous molding of weatherstrips having cut portions, resulting in low manufacturing efficiency.

Therefore, a head 120 shown in FIG. 10 is used. This head 120 comprises a fixed body 123 having an orifice 121 and a shutter 125 that partially shields the orifice 121.The orifice 121 is closed at a predetermined timing by the shutter 125 while extruding the weather strip. As a result, a cut portion is formed partially in the weather strip (see Japanese Patent Application Laid-Open No. 114040/1983).

<Four problems to be solved by the invention> However, the cut portion formed by the head has a shape that is different from the shape of the orifice 121 and the shutter 125.
The degree of freedom in design is limited by the shape of the upper edge.

Furthermore, in the head 120, since the shape of the orifice 121 changes, there is a problem that the material protrudes when shielding by the shutter 125, and the material shrinks when the shutter 125 stops shielding, that is, the design of the weather strip is affected. descend. Of course, it would be possible to change the amount of material extruded by following the movement of the shutter 125 (change in diameter of the orifice 121), but this is difficult.

Further, the cut portion needs to be accurately positioned in the product weatherstrip in order to reliably prevent interference between the weatherstrip and components. For this purpose, it is important to determine the position at which to cut the extruded weatherstrip for each product length in relation to the cut section.In other words, the purpose of this invention is to An object of the present invention is to provide a weatherstrip manufacturing device that can form a cut portion of an arbitrary shape with good design when molding. A further object of the present invention is to provide a device that can draw marks on a weatherstrip that is extruded into a long length so that it can be accurately cut into product lengths while corresponding to the cut portions of the weatherstrip.

Means for Solving the Problems> As a result of repeated studies to achieve the above object, the inventors came up with the following invention.

A weatherstrip manufacturing device that partially cuts an unvulcanized weatherstrip that has been extruded to a state where it is hardly stretchable or has a predictable stretch rate and is being moved as it is, the weatherstrip being moved. a movement amount detection means for detecting the movement amount and outputting a movement amount signal to the first control means, and comparing the current movement amount of the weatherstrip obtained based on the movement amount signal with a preset movement amount of the weatherstrip inputted in advance. A first control means outputs a drive control signal to the cutting means based on the comparison result, and a cut blade and a receiving roller are arranged to sandwich the weather strip. This weatherstrip manufacturing apparatus is characterized in that it is equipped with a cutting means that abuts a cut blade and a receiving roller against the weatherstrip until it can be cut, or separates at least the cut blade from the weatherstrip.

This allows the position to be cut to be automatically controlled.

Furthermore, the weatherstrip manufacturing apparatus includes a second control means for calculating the current moving speed of the weatherstrip from the movement amount signal and outputting a drive signal to the marking means based on the calculation result; By adding a marking means for marking the weatherstrip while moving the marker in a direction parallel to the movement of the strip at the same speed, dot-like marks are drawn on the weatherstrip every unit length.

Note that in this specification, "unit length of weatherstrip" refers to the length of the weatherstrip when viewed as a product.

<Example> Hereinafter, this invention will be explained in more detail based on examples.

First Embodiment The manufacturing apparatus 10 of this embodiment has (a) movement amount detection means 20, (b) first control means 40, as shown in FIG. (1) A cutting means 50 is provided.

(a) As shown in FIG.
1 and a rotary encoder 23, and is arranged near the extrusion port of the head 11. The roller 21 is pivotally supported by a frame 25 with its peripheral surface in contact with the lower surface of the unvulcanized weather strip W. And that axis 2
7 is connected to the rotating shaft of the rotary encoder 23. Therefore, as the weather strip W moves, the roller 21 is driven to rotate, and the rotary encoder 23 is rotated in synchronization with the roller 21. Thereby, the linear movement amount of the weather strip W is converted into the rotation amount of the rotary encoder 23, and a movement amount signal (pulse signal) corresponding to the rotation amount is output.

In the example of FIG. 2, the roller 21 is brought into contact with the lower surface of the weather strip W, but of course it can be brought into contact with the upper surface or side surface of the weather strip W. Furthermore, as shown in FIG. 3, when forming a fine uneven pattern such as weatherstrip W unevenness, the rotary encoder 23 can be connected to the pattern forming roller 31. This makes it possible to reliably prevent slippage between the weatherstrip w-3 forming rollers 31. In addition, the code 33 in the figure
Reference numeral 35 indicates a presser roller, and 35 indicates a roller unit.

Further, the position of the roller 21 is not particularly limited, and for example, it can be brought into contact with the insert 13 before being introduced into the head 11, or it can be brought into contact with the weather strip W behind the cutting means 50 in FIG. .

Above, we have explained the method of converting the amount of movement of the weatherstrip W into the amount of rotation and then detecting this. However, in order to detect the amount of movement of the weatherstrip W, there are other methods such as an optical method,
A known method such as an air method can be adopted.

(a) The movement amount signal output from the rotary encoder 23 described above is input to the first control means 40. This 3
41 The control means 40 compares the set movement amount of the weatherstrip input in advance with the current movement amount of the weatherstrip obtained by integrating the movement amount signal, and
The current rotation amount of the motor 67 (corresponding to the current position of the cutting blade 53) obtained by integrating the rotation amount signal (pulse signal; input from the rotary encoder 69 described later) of the motor 67, which will be described later, and the input value in advance. The CPU is programmed to compare the set rotation amount of the motor 6 and output a drive control signal based on the result. This drive control signal causes the cutting means 50 to operate and cut the unvulcanized weatherstrip W at a predetermined position.

Note that the set travel distance of the weather strip and the set rotation of the motor can be changed as appropriate using an external input device.

(1) The drive control signal output from the first control means 40 described above is input to the cutting means 50. This cutting means 5
0 includes a cutting section 51 and a moving device 61 for the cutting section 51.

The cutting section 51 has a structure in which a cutting blade 53 and a receiving roller 55 are arranged to sandwich the weather strip W (see Fig. 4). In Fig. 0, reference numeral 57 is a frame of the receiving roller 55, and reference numeral 59 is a cutting blade. 53 is a compression coil spring that biases the receiving roller 55 toward the roller 55 side. Note that the receiving roller 55 has its peripheral surface in contact with the weather strip W, and supports the weather strip W from below.

The B working device 61 includes a support member 63 for the cut blade 53 and a screw 6.
5, a motor 67 and a rotary encoder 69. Note that the reference numeral 71 in the figure is a base, and the reference numeral 73 is a guide for the support member 63. The support member 63 is a screw 65
The screws 65 are fixed to the rotating shaft of a motor 67. As a result, the support member 63 moves in the axial direction of the screw 65 in accordance with the amount of rotation (number of rotations, direction of rotation) of the motor 67. motor 67
A servo motor or the like is applied. A rotary encoder 69 is also connected to the rotating shaft of the motor 6, and outputs the amount of rotation of the motor 6 as a rotation amount signal.

When the drive control signal from the first control means 40 is input to the motor 67, the motor 67 starts to rotate, and the rotation amount signal of the motor 67 is fed back from the rotary encoder 69 to the first control means 40. Based on this rotation amount signal, the first control means 40 controls the motor 67
The current rotation amount is compared with a preset rotation amount input manually, and a drive control signal for rotating the motor 67 in accordance with the set rotation amount is output to the motor 6.

Note that the relative position of the cutting blade 53 with respect to the weather strip W corresponds to the amount of rotation of the motor 67.

In the above, the moving device 61 uses a motor 6, but in addition, a hydraulic circuit, a cam and a cam follower,
The moving device can be configured using a crank mechanism or the like.

Furthermore, by providing an auxiliary roller 75 as shown in Figures M5 and M6, it is possible to reliably prevent the weather strip W from escaping from the cutting blade 53.

The receiving roller 8 and the auxiliary roller may be driven rollers, but in that case, the rotational speed of each roller is controlled using a drive signal from a second control means 95, which will be described later.

Further, the receiving roller may be moved in conjunction with the cutting blade. In other words, the receiving roller supports the weatherstrip only while the cut blade is cutting the weatherstrip.

In the embodiment, one set of cutting means 50 is provided, but it goes without saying that two or more sets of cutting means 50 may be provided.

Hereinafter, the manner of use of the performance device 40 of the embodiment will be explained.

The set movement amount of the weather strip W and the set rotation amount of the motor 67 are manually input to the first control means 40 in advance.The set rotation receiving position corresponds to the position of the pressing member 81, so the set movement amount is set. The relationship between the rotation amount and the set rotation amount is as displayed on the CRT chart of the first control means 40 in FIG. In this chart, the horizontal axis shows the set movement amount of the weather strip W, and the vertical axis shows the set rotation amount of the motor 67. S to E on the horizontal axis indicate the unit length of the product weatherstrip, and 0 on the vertical axis indicates that the rotation amount of the motor 67 is O (that is, the motor 67 is stopped and the cutting blade 53 is the weatherstrip W). The state of being separated from the

Then, the extrusion work of the weather strip W is started. When the extrusion condition becomes stable, the manufacturing apparatus 10 is operated. This state corresponds to S on the horizontal axis of the chart.

At this time, the drive control signal is not output from the first control means 40, so the motor 67 is not rotating.
As the weatherstrip W is pushed out, the amount of movement is input from the rotary encoder 23 to the first control means 40 as a movement amount signal. Since this movement amount signal is input in the form of pulses, the CPU of the first control means 40 integrates the pulses, thereby obtaining the current movement amount of the weatherstrip W. In terms of the chart, S
It will move to the left.

When the current moving amount of the weather strip W reaches pi of the chart (set moving amount), a drive control signal is output from the first control means 40, and the motor 41 moves the support member 63 of the cutting blade 53 close to the weather strip W. Start rotating in the direction you want. Via this rotation receiving rotary encoder 69, it is inputted to the first control means 40 as a rotation amount signal. Then, the first control means 40 outputs a control drive signal to the motor 41 so that the amount of rotation of the motor 67 follows the chart.

In addition, in the chart, the cut blade 53 cuts the seal lip portion 5 of the weatherstrip W between 5 and 5. Also, the current moving distance of the weather strip W is P2 on the chart.
When this is reached, the first control means 40 outputs a drive control signal to reverse the motor 67. Then, at P3, the rotation of the motor 67 is stopped.

Thereafter, when the current moving amount of the weatherstrip W reaches E, the l cycle ends. This E matches S of the first cycle.

As a result of the above, the weather strip W of unit length has been extruded. This is then vulcanized and cut to obtain a product weatherstrip W.

In addition, in the above embodiment, when forming two or more deformed portions 10 on the weatherstrip W per unit length, the set movement amount of the weatherstrip W is adjusted so that two or more concave portions are drawn on the chart. , the set rotation amount of the motor 67 is determined.

Further, if the rotation amount of the rotor 6 which defines the movement amount of the cutting blade 53 is set in advance in the memory of the first control means 40, a program for controlling the rotation amount of the motor 67 and a rotary Encoder 69 becomes unnecessary.

Second Embodiment The manufacturing apparatus 90 of this embodiment includes (7) movement amount detection means 2
0, (a) first control means 40a, (t) cutting means 50
, (1) second control means 95 and (e) marking means 1
00. Note that FIG. 7 shows a schematic configuration diagram of this manufacturing apparatus 90, and FIG. 8 shows a perspective view of the manufacturing apparatus 90.

Here, (a) the movement amount detection means 20 and (a) the cutting means 50 are the same as in the previous embodiment, and (b) the first control means 40a has the same functions as those in the previous embodiment. , added a function for activating the second control means.

That is, the first control means 40a of this embodiment has the following effect (1).
, ■ Consists of a CPU programmed to do the following.

■ Compare the travel distance of the weatherstrip that has been input in advance and the current travel distance of the weatherstrip obtained by integrating the travel amount signal, and also compare the rotation amount signal of motor 6 (pulse signal; The current rotation amount of the motor 67 (corresponding to the current position of the cutting blade 53) obtained by integrating the rotation amount (input from the encoder 69) is compared with the set rotation amount of the motor 67 that has been input in advance, and the result is A drive control signal is output based on the

(2) Compare the current moving amount of the weather strip W with the set moving amount, and output an activation signal to the second control means 95 based on the result.

(1) The movement amount signal output from the rotary encoder 23 described above is also input to the second control means 95. When the actuation signal is input from the first control means, this second control means 95 calculates the current moving speed of the weather strip W from the number of pulses of the movement amount signal input per unit time, and uses the result of the calculation. The CPU is programmed to output a drive signal based on the drive signal. Of course, this CPLJ
can also be used as the first control means 40a.

The drive signal output from the 21st ItlJ control means 75 described above is input to the marking means 100.

This marking means 100 includes a marker 101 and a moving device 102 for the marker.

The marker 101 is not particularly limited as long as it can mark the surface of the weather strip W, but in the embodiment, a paint marker was used.

When the moving device 102 is at the reference point, the marker 101 is placed at a distance from the cutting blade 51 corresponding to the interval of the horizontal axis 5-PI in the CRT display chart of FIG. .

Moving device i of marker 101! 102 is marker 10
a vertical moving section 103 that moves the marker 101 toward and away from the weather strip W;
3 and a lateral moving section 109 that moves the weather strip W in a direction parallel to the moving direction of the weather strip W. And the vertical moving part 1
The reference point of the moving device 102 is a state where the marker 101 is separated from the weather strip W at point 03 and the lateral moving section 109 is at a distance corresponding to the interval S-21 in the chart described above.

The vertical movement section 103 is composed of a first support member 105 that supports the marker 101, and an air cylinder 107 in which the first support member 105 is fixed to the tip of a rod. By moving the rod of the air cylinder 107 in and out, the marker 101 moves closer to and away from the weather strip W.

The lateral moving part 109 is a second part that supports the air cylinder 10).
A support member 111, a screw 113 that is a pair of screws on the second support member 111 (a rod-shaped member disposed in a direction parallel to the moving direction of the weather cover I/lip W), and a rotation motor for the screw 113. It consists of 115. In addition, the reference numeral 117 in the figure is a base, and the reference numeral 119 is a guide. By driving the motor 115 and rotating the screw 113, the second support member 111 moves in a direction parallel to the movement of the weather strip W. Also, if the direction of rotation of the screw 113 is reversed, Second support member 111
will move in the opposite direction to the moving direction of the weather strip W. As the second support member moves, the marker 101 also moves.

Next, the manner of use of the manufacturing apparatus 90 of this embodiment will be explained by taking as an example the case where the same weather strip W as in the case of the manufacturing apparatus 10 of the previous embodiment is manufactured.
The operation of the cutting means 50 is similar to the previous embodiment. The first control means 40a, the second control means 95, and the marking means 100 operate as follows.

At the time of starting the operation of this manufacturing apparatus 90, the first control means 40a
An actuation signal is output from the 's2 control means 95. Then, the second control means 95 calculates the current moving speed of the weather strip W based on the movement amount signal inputted from the movement amount detection means 20, and based on the result, the marking means 1
Outputs the drive signal to 00. Based on this drive signal, the marking means 100 moves the lateral moving part 10 at the reference point.
9 at the same speed as the weather strip W for a predetermined time (1 to 2
After moving the marker 101 (or 20 to 30 c), the vertical moving unit 103 is operated so that the marker 101 comes into contact with the query reservoir W while maintaining the moving state. As a result, dot-like marks are drawn on the weather strip W. This dotted mark becomes the intended cutting position of the weatherstrip W. After drawing the mark, the moving device 102 returns to the reference point.

Further, at E in the chart, an actuation signal is input from the first control means 40a to the second control means 75. As a result, a drive signal is outputted from the second control means 75 to the marking means 100, and the marking operation is performed as described above, and a dotted mark is drawn.

As a result of the above, the weather strip W of unit length has been extruded. Then, this is vulcanized, and the weatherstrip is cut at the dot-like marks drawn thereon to obtain a product weatherstrip W.

<Effects of the Invention> As explained above, the weatherstrip manufacturing apparatus of the present invention includes a movement amount detection means for detecting the movement amount of the weatherstrip and outputting a movement amount signal to the first control means; a first control means for comparing the current movement amount of the weatherstrip obtained based on the signal with a preset movement amount of the weatherstrip inputted in advance, and outputting a drive control signal to the cutting means based on the comparison result; and a cutting blade. and the receiving roller are arranged to sandwich the weather strip,
It is characterized by comprising a cutting means for bringing the cut blade and the receiving roller into contact with the weather strip until the weather strip can be cut, or at least separating the cut blade from the weather strip, based on a drive control signal.

According to the manufacturing apparatus having such a configuration, the movement of the cutting blade can be automatically controlled, so that a cut portion having an arbitrary shape can be formed. In other words, the degree of freedom in designing the cut portion is improved.

Also, when cutting the weather strip with the cut blade, the receiving roller prevents the weather strip from escaping from the cut blade, so the cut edge of the cut blade becomes clear. ■Since the orifice of the head does not change, material flow is stable.

From these (1) and (2), the manufacturing apparatus of the present invention can manufacture weatherstrips with better design than conventional manufacturing apparatuses.

Furthermore, the weatherstrip manufacturing apparatus includes a second control means for calculating the current moving speed of the weatherstrip from the movement amount signal and outputting a drive signal to the marking means based on the calculation result; A marking means is added for marking the weather strip while moving the marker in a direction parallel to the movement of the strip at the same speed.

As a result, it is possible to draw a mark for each unit length of the weatherstrip that has been pushed out and is still moving (to the S-planned cutting position) while moving the marker in a direction parallel to and at the same speed as the movement of the weatherstrip. can. Therefore,
The marks drawn on the weatherstrip are in the form of dots, making it possible to accurately and easily position the cutting during the cutting operation.

It is also possible to determine the cutting position based on the cut part, but this would require a device to detect the position of the cut part, which would lead to an increase in equipment costs, as well as undesirable weather conditions. If you do not move the marker parallel to and at the same speed as the strip,
In other words, if the marker is in a fixed state, the mark drawn on the weatherstrip will be in the form of a line, which increases the probability that an error will occur in the cutting position, which is not preferable.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of the manufacturing apparatus 10 of the first embodiment, FIG. 2 is a perspective view of the manufacturing apparatus, and FIG. 3 shows a manufacturing apparatus 10a equipped with a movement amount detection means different from that in FIG. 2. 1 in the perspective view and FIG. 4 is the cut portion 5
1, 2 in FIG. 4 is a sectional view of the cut portion 51, FIG. 5 is a plan view showing another embodiment of the cutting means 50a, FIG. 6 is a sectional view of the cut portion 51a, and FIG. A schematic configuration diagram of the manufacturing device 90 of the second embodiment, FIG. 8 is a perspective view of the manufacturing device 90, FIG. 9 is a cross-sectional view of the weather strip showing the portion to be cut, and FIG. 10 is a conventional head 120 is a front view showing 120. 1σ, 90... Linear device, 20... -S motion amount detection means, 40... First control means, 50... Cutting means, 51... Cutting blade, 55... Hook... Reception Roller, 95...Second control means, 100...Marking means, Patent applicant: Toyoda Gosei Co., Ltd. Figure 1 Figure 3 Figure 4-1 412 Figure 7 Figure 9 Figure 10

Claims (2)

[Claims] (1) A weatherstrip manufacturing device that partially cuts an unvulcanized weatherstrip that has been extruded to a state where it is almost non-stretchable or has a predictable expansion/contraction rate and is being moved as it is, and which moves the weatherstrip. a moving amount detecting means for detecting a moving amount and outputting a moving amount signal to a first control means described later; and a set moving amount of the weather strip into which the current moving amount of the weather strip obtained based on the moving amount signal is inputted in advance. a first control means that compares the weather strip and outputs a drive control signal to the cutting means described later based on the comparison result; a cut blade and a receiving roller are arranged to sandwich the weather strip, and based on the drive control signal, A weather strip manufacturing apparatus comprising: a cutting means for bringing the cut blade and the receiving roller into contact with the weather strip until the weather strip can be cut, or for separating at least the cut blade from the weather strip. (2) Partially cutting the unvulcanized weather strip, which has been extruded to a state where it is hardly stretchable or has a foreseeable stretch rate and is still moving;
A weatherstrip manufacturing apparatus that marks the weatherstrip for each unit length, the weatherstrip manufacturing apparatus comprising: a movement amount detection device that detects the movement amount of the weatherstrip and outputs a movement amount signal to a first control means described later and a second control means described later. a means for comparing the current moving amount of the weather strip obtained based on the moving amount signal with a set moving amount of the weather strip inputted in advance, and outputting a drive control signal to the cutting means described later based on the comparison result; a first control means that outputs an actuation signal to a second control means; when the actuation signal is input from the first control means;
A second control means calculates a current moving speed of the weather strip from the movement amount signal and outputs a drive signal to a marking means described later based on the calculation result, and a cut blade and a receiving roller are arranged to sandwich the weather strip. a cutting means for bringing the cut blade and the receiving roller into contact with the weather strip until the weather strip can be cut, or at least separating the cut blade from the weather strip based on the drive control signal; A weather strip manufacturing apparatus comprising: marking means for marking the weather strip while moving a marker in a direction parallel to and at the same speed as the movement of the weather strip.