JPH0528982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a weather strip manufacturing apparatus. More specifically, the present invention relates to a weatherstrip manufacturing apparatus that partially cuts a portion of a weatherstrip that has been extruded and is being moved in order to vary 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 gauges, sunroofs, etc., and has a hollow seal portion 1 (see Fig. 9), a mounting lip portion 3, and a seal lip portion 5. Cut portions are formed in the parts to prevent interference with other members.

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

Therefore, a head 120 shown in FIG. 10 is used. This head 120 is the orifice 12
1 and an orifice 121.
It is equipped with a shutter 125 that partially shields the area. Then, while the weather strip is being extruded, the orifice 121 is shielded with a shutter 125 at a predetermined timing, and as a result, a skip portion is partially formed in the weather strip (see Japanese Patent Laid-Open No. 114040/1983). .

<Problems to be Solved by the Invention> However, the shape of the cut portion formed by the head is limited by the shape of the orifice 121 and the upper edge shape of the shutter 125, and the degree of freedom in its design is small.

Furthermore, in the head 120, the orifice 1
Since the shape of the shield 21 changes, there is a problem that the material protrudes when the shutter 125 is used for shielding, and the material shrinks when the shutter 125 stops shielding. In other words, the design of the weather strip is degraded.
Of course, the movement of the shutter 125 (= orifice 12
It would be possible to change the extrusion amount of the material in accordance with the change in the diameter (1), but this is difficult.

Further, the cut portion needs to be accurately positioned in the product weather strip in order to reliably prevent interference between the weather strip and the parts. For this purpose, it is important to determine the position at which the extruded long weather strip is cut into product lengths in relation to the cut portion.

That is, an object of the present invention is to provide a weather strip manufacturing apparatus that can form cut portions of arbitrary shapes with good design when continuously molding weather strips. A further object of the present invention is to provide a device that can draw marks on a long extruded weather strip so that it can be accurately cut into product lengths while corresponding to the cut portion of the weather strip.

<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 almost impossible to stretch or has a predictable expansion/contraction rate and is still moving, and detects the amount of movement of the weatherstrip. and a moving amount detecting means for outputting a moving amount signal to the first control means, and 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. A first control means outputs a drive control signal to the cutting means based on the result, and a cutting blade and a receiving roller are arranged to sandwich the weather strip. This weatherstrip manufacturing apparatus is characterized by comprising a cutting means for abutting a receiving roller against the weatherstrip or separating at least a cutting blade from the weatherstrip.

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

Furthermore, to the above-mentioned weather strip manufacturing equipment,
a second control means that calculates the current moving speed of the weather strip from the movement amount signal and outputs a drive signal to the marking means based on the calculation result; and a second control means that moves the marker in a direction parallel to and at the same speed as the movement of the weather strip based on the drive signal. By adding marking means for marking the weather strip while marking the weather strip, dot-like marks are drawn on the weather strip for each unit length.

In this specification, the term "unit length of the weatherstrip" refers to the length of the weatherstrip when viewed as a product.

<Examples> The present invention will be described in more detail below based on examples.

First Embodiment As shown in FIG. 1, the manufacturing apparatus 10 of this embodiment includes (a) a movement amount detecting means 20;
It comprises (a) first control means 40 and (c) cutting means 50.

(A) The movement amount detection means 20 is as shown in FIG.
It consists of a roller 21 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. As a result, the amount of linear movement of the weather strip w is converted into the amount of rotation of the rotary encoder 23, and a movement amount signal (pulse signal) corresponding to the amount of rotation is output.

In the example shown in 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 grain on the weather strip w, the rotary encoder 23 can be connected to the pattern forming roller 31. Thereby, slippage between the weather strip w and the patterned forming roller 31 can be reliably prevented. In addition, the reference numeral 33 in the figure is a presser roller, and the reference numeral 35 is a roller unit.

Further, the position of the roller 21 is not particularly limited; 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 weather strip w into the amount of rotation and then detecting this.
In order to detect the amount of movement of the weather strip w, other known methods such as an optical method or an air method may be used.

(a) The movement amount signal output from the rotary encoder 23 described above is input to the first control means 40. This first control means 40 compares the set moving amount of the weather strip inputted in advance with the current moving amount of the weather strip obtained by integrating the moving amount signal, and also compares the rotation amount signal (pulse) of the motor 67, which will be described later. The current rotation amount of the motor 67 (corresponding to the current position of the cutting blade 53) obtained by integrating signals (input from a rotary encoder 69 described later);
It is equipped with a CPU programmed to compare the preset rotation amount of the motor 67 and output a drive control signal based on the result. By this drive control signal, the cutting means 5
0 is activated, and a predetermined position of the unvulcanized weather strip w is cut.

The set movement amount of the weather strip and the set rotation amount of the motor can be changed as appropriate using an external input device.

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

The cutting portion 51 includes a cutting blade 53 and a receiving roller 5.
5 are arranged with a weather strip w sandwiched between them (see FIG. 4). Code 5 in the diagram
7 is a frame of the receiving roller 55, and 59 is a compression coil spring that biases the cutting blade 53 toward the receiving roller 55. 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 moving device 61 supports the support member 6 of the cutting blade 53.
3, a screw 65, 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 base material 63 is arranged in a threaded pair with respect to the screw 65, and the screw 65 is fixed to the rotating shaft of the motor 67. As a result, the motor 67
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). A servo motor or the like is applied to the motor 67. A rotary encoder 69 is also connected to the rotating shaft of the motor 67, and outputs the amount of rotation of the motor 67 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 rotating and the rotary encoder 6
9 feeds back a rotation amount signal of the motor 67 to the first control means 40. Based on this rotation amount signal, the first control means 40 compares the current rotation amount of the motor 67 with a set rotation amount inputted in advance, and sends a drive control signal to rotate the motor 67 in accordance with the set rotation amount. is output to the motor 67.

Note that the amount of rotation of the motor 67 depends on the amount of rotation of the cutting blade 53.
The relative positions of the weather strips and the weather strips w correspond to each other.

Although a motor 67 has been shown as the moving device 61 above, the moving device can also be constructed using a hydraulic circuit, a cam and a cam follower, a crank mechanism, and the like.

Furthermore, by providing an auxiliary roller 75 as shown in FIGS. 5 and 6, it is possible to reliably prevent the weather strip w from escaping from the cutting blade 53.

Each receiving roller and auxiliary roller may be a driving roller, but in that case, the rotational speed of each roller will be controlled using a driving signal from a second control means 95, which will be described later.

Further, the receiving roller can be moved in conjunction with the cutting blade. In other words, the receiving roller supports the weather strip only while the cutting blade is cutting the weather strip.

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 shaping 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 input into the first control means 40 in advance. Since this set amount of rotation corresponds to the position of the pressing member 81, the relationship between the set amount of movement and the set amount of rotation is the same as that of the first control means 40 in FIG.
will be displayed on the CRT chart. In this chart, the horizontal axis is the weather strip.
The vertical axis indicates the set rotation amount of the motor 67, and the vertical axis indicates the set rotation amount of the motor 67. S to E on the horizontal axis indicate the unit length of the product weather strip. Also, 0 on the vertical axis
indicates that the amount of rotation of the motor 67 is 0 (that is, the motor 67 is stopped and the cutting blade 53 is separated from the weather strip w).

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 first control means 40 does not output a drive control signal, so the motor 67 is not rotating. Thereafter, as the weather strip w is pushed out, the amount of movement thereof 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. As a result, the current amount of movement of the weather strip w can be obtained. In chart terms, this means moving from S to the left.

When the current movement amount of the weather strip w reaches the chart (set movement amount) P1, the first control means 4
A drive control signal is output from 0, and the motor 41
The support member 63 of the cutting blade 53 begins to rotate in the direction of bringing it closer to the weather strip w. This amount of rotation is input to the first control means 40 via the rotary encoder 69 as a rotation amount signal. The first control means 40 then sends a control drive signal to the motor 41 so that the amount of rotation of the motor 67 follows the chart.
Output to.

In addition, in the chart, the cut blade 53 is
cuts off the seal lip portion 5 of the weather strip w. Further, when the current moving distance of the weather strip w reaches P2 of the chart, 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.

After that, the current travel distance of the weather strip w is E.
When this is reached, one cycle ends. This E matches S in the next cycle.

As a result of the above, a weather strip w of unit length has been extruded. Then vulcanize this,
Cut it to obtain a product weather strip W.

In the above embodiment, when forming two or more deformed portions 10 in the weather strip w per unit length, the set movement amount of the weather strip w and the motor should be adjusted so that two or more concave portions are drawn on the chart. The set rotation amount of 67 is determined.

Furthermore, if the amount of rotation of the motor 67 that defines the amount of movement of the cutting blade 53 is set in advance in the memory of the first control means 40, the program for controlling the amount of rotation of the motor 67 and the rotary encoder 69 can be set in advance. No longer needed.

Second Embodiment The manufacturing apparatus 90 of this embodiment includes (a) movement amount detection means 20, (b) first control means 40a, (c) cutting means 50, (d) second control means 95, and (e)
A marking means 100 is provided. In addition, the seventh
The figure 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 (c) the cutting means 50 are the same as those in the previous embodiment. (a) The first control means 40a has a function for operating the second control means in addition to the function of the previous embodiment.

That is, the first control means 40a of this embodiment is programmed to perform the following operations.
Consists of CPU.

The set movement amount of the weather strip inputted in advance is compared with the current movement amount of the weather strip obtained by integrating the movement amount signal, and the rotation amount signal (pulse signal) of the motor 67 is calculated.
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 rotary encoder 69 is compared with the set rotation amount of the motor 67 that has been input in advance. A drive control signal is output based on the result.

The current amount of movement of the weather strip w is compared with the set amount of movement, and an activation signal is output to the second control means 95 based on the result.

(d) 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, the 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,
It is equipped with a CPU programmed to output a drive signal based on the calculation result. Of course,
This CPU can also be used as the first control means 40a.

(E) The drive signal output from the second control means 75 described above is input to the marking means 100. This marking means 100 includes a marker 1
01 and its moving device 102.

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 on the horizontal axis S-P1 in the CRT display chart of FIG. .

The moving device 102 for the marker 101 includes a vertical moving section 103 that moves the marker 101 close to and away from the weather strip w, and a horizontal moving section 103 that moves the vertical moving section 103 along with the marker 101 in a direction parallel to the moving direction of the weather strip w. It consists of a moving section 109. Then, the vertical movement unit 103 moves the marker 1
01 is separated from the weather strip w,
The lateral movement section 109 is the S-
A state at a distance corresponding to the interval P1 is the reference point of the mobile device 102.

The vertical movement section 103 includes a first support member 105 that supports the marker 101, and a first support member 105 that supports the marker 101.
It consists of an air cylinder 107 fixed to the tip of a rod. Then, by inserting and removing the rod of the air cylinder 107, the marker 101
will be located close to and separated from the weather strip w.

The lateral movement section 109 includes a second support member 111 that supports the air cylinder 107, and a second support member 111 that supports the air cylinder 107.
11, a screw 113 serving as a screw pair (a rod-shaped screw disposed in a direction parallel to the moving direction of the weather strip w), and a rotating motor 1 for the screw 113.
It consists of 15. In addition, the reference numeral 11 in the figure
7 is a base, and 119 is a guide. and,
By driving the motor 115 and rotating the screw 113, the second support member 111 is moved in a direction parallel to the movement of the weather strip w.
Also, if the direction of rotation of the screw 113 is reversed, the second
The support member 111 will move in a direction opposite to the direction of movement of the weather strip w. and,
As the second support member moves, the marker 101 also moves.

Next, the manner in which the manufacturing apparatus 90 of this embodiment is used will be explained, taking as an example the case where the same weather strip w as that of the manufacturing apparatus 10 of the previous embodiment is manufactured.

The operations of the movement amount detection means 20 and the cutting means 50 are the same as in the previous embodiment. The first control means 40a, the second control means 95 and the marking means 1
00 works as follows.

When the manufacturing apparatus 90 starts operating, an operating signal is output from the first control means 40a to the second control means 95. Then, based on the movement amount signal inputted from the movement amount detection means 20, the second control means 95
The current moving speed of the weather strip w is calculated, and a drive signal is output to the marking means 100 based on the result. Based on this drive signal, the marking means 100 moves its lateral moving part 109 that has reached the reference point.
at the same speed as the weather strip w for a predetermined time (1
~2 seconds; or 20 to 30 cm), then move the vertical moving unit 103 to the marker 10 while maintaining the moving state.
1 comes into contact with the weather strip w. As a result, dot-like marks are drawn on the weather strip w. This dotted mark becomes the intended cutting position of the weather strip w.
After drawing the mark, the moving device 102
returns to the reference point.

In addition, in chart E, the first control means 4
An actuation signal is input from 0a 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, a weather strip w of unit length has been extruded. Then vulcanize this,
The weather strip is cut at the dot-like marks drawn thereon to obtain a product weather strip 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, and a movement amount detection means for detecting the movement amount of the weatherstrip and outputting a movement amount signal to the first control means. The current travel amount of the weather strip obtained based on the weather strip is compared with the pre-input set travel amount of the weather strip.
A first control means outputs a drive control signal to the cutting means based on the comparison result, a cutting blade and a receiving roller are arranged to sandwich the weather strip, and the weather strip is cut until the weather strip can be cut based on the drive control signal. It is characterized by comprising a cutting means for bringing the blade and the receiving roller into contact with the weather strip, or for separating at least the cutting blade from the weather strip.

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

Further, when cutting the weather strip with the cutting blade, the receiving roller prevents the weather strip from escaping from the cutting blade, so that the cut edge of the cutting blade becomes clear. Since the head orifice does not change, material flow is stable.
As a result, the manufacturing apparatus of the present invention can manufacture weather strips with better design than conventional manufacturing apparatuses.

Furthermore, to the above-mentioned weather strip manufacturing equipment,
a second control means that calculates the current moving speed of the weather strip from the movement amount signal and outputs a drive signal to the marking means based on the calculation result; and a second control means that moves the marker in a direction parallel to and at the same speed as the movement of the weather strip based on the drive signal. At the same time, marking means for marking the weather strip is added.

As a result, marks can be drawn for each unit length of the weatherstrip that has been pushed out and is still moving (=toward the intended cutting position) while moving the marker in a direction parallel to and at the same speed as the weatherstrip. Therefore, the marks drawn on the weather strip are in the form of dots, making it possible to accurately and easily position the cut during the cutting operation.

It is also possible to determine the cutting position based on the cut part, but in that case,
Since a device for detecting the position of the cut portion is required, this leads to an increase in equipment cost, which is undesirable.

Also, if the marker is not moved parallel to the movement of the weather strip and at the same speed, that is, if the marker is in a fixed state, the mark drawn on the weather strip will be linear, which is undesirable because there will be a high probability of errors in the cutting position. .

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a 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. In the perspective view, 1 in FIG. 4 is the cut portion 51.
2 in FIG. 4 is a cross-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 cross-sectional view of the cut portion 51a,
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 weather strip. FIG. 3 is a front view showing the head 120. DESCRIPTION OF SYMBOLS 10, 90... Shaping device, 20... Movement amount detection means, 40... First control means, 50... Cutting means, 51... Cutting blade, 55, 77... Receiving roller, 95... Second Control means, 100... marking means.

[Claims]

1. A core material having a required curved surface shape and having a circumferential groove formed along the outer shape of the central part, a skin material that is integrated with the surface of this core material, and a peripheral edge end formed on the core material. In the manufacturing method of an automobile door trim, which consists of a middle part attached to the middle part of the core material so as to be located in the circumferential groove, a trim is made on the back side of the skin material to be approximately equal to the outer shape of the middle part. A process of forming a double skin material by placing the intermediate members facing each other on the front surface side and joining and integrating the peripheral edges, and after forming the above-mentioned circumferential groove and forming the core material into the required curved shape. , a step of integrating the core material and the double skin material so that the peripheral end of the intermediate member is located in the circumferential groove of the core material, and placing the double skin material on the surface of the core material; An automobile door trim comprising the steps of press-fitting a cutting tool such as a welder bar or a seal cut bar and cutting and removing the skin material along the circumferential groove to expose an intermediate member on the product surface. manufacturing method. 2. A core material having a required curved surface shape and having a circumferential groove formed along the outer shape of the central part, a skin material affixed to the surface side of this core material, and a peripheral edge end formed in the circumferential groove.

Claims (1)

2. A weather strip that partially cuts an unvulcanized weather strip that has been extruded to a state where it is almost non-stretchable or has a predictable expansion/contraction rate and is still moving, and also marks the weather strip for each unit length. A manufacturing apparatus comprising: a movement amount detection output for detecting the movement amount of the weather strip and outputting a movement amount signal to a first control means described below and a second control means described later; A first unit that compares the current travel amount of the weather strip with a set travel amount of the weather strip that has been input in advance, and outputs a drive control signal to the later-described cutting means based on the comparison result, and outputs an actuation signal to the later-described second control means. a second control means for calculating the current moving speed of the weather strip from the movement amount signal when the actuation signal is input from the first control means, and outputting a drive signal to the marking means to be described later based on the calculation result;
a control means, a cutting blade and a receiving roller are arranged to sandwich the weather strip, and based on the drive control signal, the cutting blade and the receiving roller are brought into contact with the weather strip until the weather strip can be cut; or at least a cutting means for separating the cutting blade from the weather strip; and a 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 based on the drive signal. A weather strip manufacturing device characterized by: