JPS6352971B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a body side welt of a vehicle, etc., that is, a gasket for a vehicle door that is attached to border the door and tightly adheres to the body for waterproofing, and other products. The present invention relates to a method for manufacturing a welt core metal that is molded inside a packing and has elasticity as a packing.

<Prior art> There are various shapes of welt core metals, one of which is a nearly rectangular core and a core that is adjacent to each other at two locations near both ends of the core in the length direction. There is a shape that consists of connecting parts that are connected at regular intervals in the width direction and are formed with a thickness smaller than the thickness of the core and can be easily torn off, and the core has angular parts at both ends. If this happens, when the body side welt is greatly curved, it will break through the rubber or plastic packing material that molds the core, causing a problem that will require replacement of the body side welt and cause injury.

When manufacturing the welt core metal by pressing, the male mold is pressed against the female mold at high speed, and continuous strip metal plates are pressed at regular intervals while the male mold is rising. This is done by intermittent feeding, and since it can be punched in any way depending on the die, it is possible to create a shape with no sharp corners on both ends of the core, and the above problems will not occur, but there will be a large amount of punching waste. As a result, it takes a lot of time to process and clean the area around the machine, and the material is uneconomical.Also, even if the number of punches is increased to 300 punches per minute, which is close to the maximum, It can only be manufactured at a speed of 7 to 8 meters per minute, the manufacturing capacity is small, chips are produced as much as 1/3 of the material, it is difficult to retain the material, and mold costs are high.

Therefore, as a method for continuously manufacturing welt cored metal without using a press, a continuous band-shaped metal plate is passed between a pair of sawtooth gears that mesh with each other and can perform shearing, and short cuts are made at both ends and in the middle. A long cut is made to create a wavy metal strip with discrepancies at the cut point, and then roller rolling is performed to cover the uncut portion to eliminate the waves, and the above cut is made into a wavy metal strip. A method was devised by expanding the plate in the longitudinal direction. According to this method, it has become possible to manufacture welt cored metal at a speed of 30 to 40 meters per minute without producing any chips. There are angular edges on both ends, which break through the rubber or plastic packing material that molds the core, causing the body side welt to have to be replaced and causing injury.

<Object of the invention> The present invention was devised in view of the above points, and
By following the method of continuously manufacturing welt core metal without using a press, the manufacturing speed has been increased to 30 to 30 per minute.
The length can be maintained at 40 meters, and the core has no sharp edges at either end, which prevents the core from breaking through the rubber or plastic that molds the core, making it difficult to remove the body side welts. This has been improved so that there are no problems that can cause injuries during replacement, and there is no generation of chips unlike in press manufacturing, making it easier to dispose of chips and clean the area around the machine. The present invention provides a method for manufacturing a welt core metal.

<Structure of the Invention> The method for producing a welt cored metal of the present invention involves flowing a continuous strip metal plate and passing the strip metal plate between a pair of sawtooth gears that can perform shearing by meshing with each other and rotating. , by making straight cuts in the width direction at both ends and the middle of the strip-shaped metal plate, and then rolling it with a roller so as to cover the parts where no cuts are made, a nearly rectangular core defined by the above cuts is obtained. The core parts are formed one after another with enlarged cuts in between, and the roller-rolled parts without cuts are used to connect adjacent core parts at regular intervals in the width direction. In the manufacturing method of welt cored metal, which is formed to have a thickness smaller than the thickness of the core and to form a connection part that is easy to break, the blade has arcuate concave curved surfaces at the bases on both sides before the above-mentioned cutting process. By passing the cutting edge of the continuous metal plate through a pair of cornering rolls having the same spacing in the circumferential direction as the cut before being widened, so that the end face of the continuous metal plate is sandwiched, The invention is characterized in that a fan-shaped indentation is made in the end face of the band-shaped metal plate corresponding to the location where the above-mentioned incision is made.

<Example> Hereinafter, an example of the method for manufacturing a welt core metal of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a method for manufacturing a welt cored metal, and FIG. 2 is a front view. The continuous band-shaped metal plate P passes between a pair of chamfering rolls 1 and 2, then passes between a pair of sawtooth gears 3 and 4,
Subsequently, it passes between a pair of rolling rolls 5 and 6. A pair of cornering rolls 1 and 2 cut fan-shaped bits 7 into the end face of the continuous band-shaped metal plate P.
The pair of sawtooth gears 3 and 4 are provided with cuts 8 and 9 in the band-shaped metal plate P.
10, and the pair of rolling rolls 5, 6 cut the cuts 8, 9,
The cut portions 8, 9, and 10 are widened in the longitudinal direction of the strip-shaped metal plate P by rolling the portions where the cut portions 10 do not fit, thereby providing gaps 11, 12, and 13.

The pair of chamfering rolls 1 and 2 are installed so that the roll axes are in the vertical direction, and are designed to pass through the band-shaped metal plate P so as to sandwich the end face of the band-shaped metal plate P. This is different from the case where the gears 3 and 4 and the pair of rolling rolls 5 and 6 pass the band-shaped metal plate P so as to sandwich the surface of the band-shaped metal plate P. And a pair of corner cutting rolls 1 and 2
is equipped with roll portions 101, 201 having biting blades 101a, 201a arranged in parallel in the circumferential direction for providing biting 7 in the end surface of the band-shaped metal plate P. These biting blades 101a, 201a are
A band-shaped metal plate P with an arcuate concave curved surface at the base of the blade.
A fan-shaped recess 7 can be provided on the end face of the plate. The seven biting blades may have a width of, for example, 2 mm to 3 mm, and there are flanges 102, 103, 202, 203 above and below the biting blades 101a, 201a, into which the end face of the band-shaped metal plate P bites. They are guided so that they do not escape from the blades 101a and 201a. Note that instead of providing this collar, a pressing roller is provided to sandwich the surface of the strip metal plate P, like a pair of serrated gears 3 and 4, so that the end surface of the strip metal plate P does not escape from the biting blades 101a and 201a. You can also do it.

The pair of sawtooth gears 3 and 4 are designed to perform shearing by meshing with each other and rotating, and cut short cuts 8 and 10 at both ends of the band-shaped metal plate P in a straight line in the width direction. A long cut 9 can be formed in the middle so that the uncut portion 14 is short.

In this way, the pair of chamfering rolls 1, 2 and the serrated gears 3, 4 have the pitches of the biting blades 101a, 201a matched with the pitches of the serrations of the serrated gears 3, 4, and are fan-shaped. The bite 7 and the cuts 8 and 10 are adjusted so that they match. Therefore, making the fan-shaped indentation 7 with the pair of chamfering rolls 1 and 2 described above means that when the cuts 8 and 10 are made, the chamfered portions are removed at both ends of the approximately rectangular core. This is to give it a rounded shape.

The above-mentioned pair of rolling rolls are, for example, a lower roll 6 having a surface length larger than the width and a lower rotation speed, and cuts 8, 9, and 10 made to be passed over the lower roll. Band-shaped metal plate P
The upper roll 5 rides on the uncut portion 14 of the upper roll and performs rolling at a rotational speed higher than that of the lower roll while applying pressure.

In addition, since the pair of serrated gears 3 and 4 are made with cuts 8, 9, and 10 by shearing, a discrepancy is created in the portion 14 where no cuts are made, and the band-shaped metal plate P is changed from a planar shape to a wave surface shape. It turns out.

Thus, the pair of rolling rolls 5 and 6 serve as pinch rolls, and the continuous strip-shaped metal plate P passes between the pair of chamfering rolls 1 and 2, and then between the pair of sawtooth gears 3 and 4. It then flows between the pair of rolling rolls 5 and 6. Therefore,
In a pair of cornering rolls 1 and 2, the band-shaped metal plate P is passed through so as to sandwich the end surface of the band-shaped metal plate P,
Fan-shaped bite 7 on the end face of the continuous band-shaped metal plate P
Then, in the pair of sawtooth gears 3 and 4, the band-shaped metal plate P is passed through the band-shaped metal plate P so as to sandwich the surface of the band-shaped metal plate P, and a short length is inserted at both ends of the band-shaped metal plate P in a straight line in the width direction. A substantially rectangular core portion 1 is formed by forming long cuts 8 and 10 and a long cut 9 in the middle, leaving a short portion 14 where no cuts are made.
5 is a continuous band-shaped metal plate P having a zigzag wave surface shape and connected at this uncut portion 14. Furthermore, the short cuts 8 and 10 at both ends are made to coincide with the fan-shaped cut-in 7, so that the substantially rectangular core 15 has a rounded shape with no sharp edges at both ends. Become. Next, in the pair of rolling rolls 5 and 6, the uncut portion 14 is connected to the core 15.
At the same time, the cuts 8, 9, and 10 are widened in the longitudinal direction of the band-shaped metal plate P by roller rolling into a band-like shape, and the discrepancy in the wave surface is eliminated, so that the thickness is smaller than that of the core. This results in the formation of a connecting portion 16 that hardens and is likely to break.

As described above, the substantially rectangular core section defined by the cuts 8, 9, and 10 is formed by the enlarged cuts 8, 10,
While forming one after another with 9 and 10 in between,
The roller-rolled portion 14 without cuts
The core parts 15, 15 that are adjacent to each other are connected at regular intervals in the width direction, and the core parts 1
It is possible to manufacture a welt core bar having a thickness smaller than the thickness of No. 5 and having a connecting portion 16 that is easy to break.

In short, in the present invention, before the step of making the cuts 8, 9, 10, the biting blades 101a, 201a having arcuate concave curved surfaces at the bases on both sides of the blades are inserted into the cuts 8, 9 before being widened. . , a new step is provided to insert fan-shaped recesses 7 corresponding to the locations where the cuts 8, 9, and 10 are made, and thereby,
When the cuts 8, 9, and 10 are made, the conventional rounded edges at both ends of the substantially rectangular core can be eliminated, resulting in a rounded shape.

In addition, in the above embodiment, cuts 8, 9, 10
The band-shaped metal plate P is inserted so that it is straight in the width direction, short at both ends and long at the middle. Since the purpose is to eliminate the vines, we replaced the sawtooth gears 3 and 4 and made cuts 8, 9, and 1.
0 may be any length ratio.

<Effects of the present invention> As explained above, the method for manufacturing a welt core metal of the present invention involves passing a continuous strip-shaped metal plate between a pair of serrated gears that mesh with each other to perform shearing, and then In a manufacturing method that allows welt core metal to be continuously manufactured at a speed of 30 to 40 meters per minute by passing it between rolling rolls, the above-mentioned core metal is passed through a pair of chamfering rolls before the step of making cuts. Pass through the continuous band-shaped metal plate so that the end surfaces of the metal plate are sandwiched,
Since the process involves making a fan-shaped cut in the end face of a continuous strip-shaped metal plate at a location that coincides with the above-mentioned cut, it can be easily applied to high-speed manufacturing and reduces the burden on workers. The area around the machine can be kept clean at all times without any chips being emitted, eliminating the need for time-consuming cleaning. It is possible to continuously manufacture a welt core metal without the risk of breaking through the space, that is, a welt core metal with a rounded shape without sharp edges at both ends of a substantially rectangular core. Continuous production is possible at high speeds without any waste of chips.

If a continuous strip metal plate is passed between a pair of serrated gears that mesh with each other to perform shearing, and then passed between a pair of rolling rolls, it is possible to continuously produce a welt core metal. In this method, if you are trying to press a roughly rectangular core into a rounded shape with no sharp edges at both ends, you will be disposing of chips, so it is important to always keep the area around the machine clean. This makes maintenance and inspection difficult due to wear of the molds, and what's more, the ability to manufacture at a speed of 30 to 40 meters per minute cannot be maintained, and the speed increases to 7 to 8 meters per minute. It is a matter of fact.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a method for manufacturing a welt core metal according to an embodiment of the present invention, and FIG. 2 is a front view. P... Band-shaped metal plate, 1, 2... A pair of chamfering rolls, 101a, 201a... Biting blade, 3,
4... A pair of serrated gears, 5, 6... A pair of rolling rolls, 7... Fan-shaped biting, 8, 9, 10...
Cuts, 11, 12, 13... gaps, 14... parts without cuts, 15... core, 16... connecting parts.

Claims (1)

[Scope of Claims] 1. A continuous metal strip is passed between a pair of sawtooth gears that can perform shearing by meshing with each other and rotating, so that both ends and the middle of the metal strip are cut. By making straight cuts in the width direction, and then rolling it with a roller so as to cover the part where no cuts are made, the approximately rectangular core defined by the above cuts can be made into widened cuts. In addition to forming the cores one after another with the roller-rolled portions formed one after another, adjacent cores are connected at regular intervals in the width direction, and the thickness of the core is In the manufacturing method of the welt core metal, which is formed to have a small thickness and a connection part that is easy to break, before the step of making the above-mentioned cuts, the biting blades having arcuate concave curved surfaces at the bases on both sides of the blades are widened as described above. By passing the end faces of the continuous metal strips through a pair of chamfering rolls having the same spacing in the circumferential direction as the cuts to be made so that the end faces of the continuous metal plates are sandwiched, the end faces of the continuous metal sheets are A method for manufacturing a welt cored metal characterized by making fan-shaped bites corresponding to the places where the cuts are made.