JPH06102283B2 - Surface elastic multi-layer plate cutting device and elastic layer notch device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cutting device for a surface elastic multi-layer plate made of a metal plate having elastic layers attached to both main surfaces, such as a urethane foam-attached steel plate.

[Prior Art] Fig. 11 shows a conventional method for manufacturing an iron plate / urethane foam composite member for an automobile.

First, after applying a lubricating oil to the steel plate 100 and subjecting the press 101 to plastic working and cutting (a), the degreasing device 102 removes oil (b), and then an adhesive and release paper are laminated. The urethane foam tape 103 is cut with the press 104, and finally the release paper is peeled off
105 and 106 were attached to both main surfaces of the iron plate member 107.

[Problems to be Solved by the Invention] Therefore, as a problem of the conventional technology, the whole process is complicated, in particular, a degreasing process is required after pressing of an iron plate, automation of urethane foam attachment is not easy, and positions of both are difficult. Poor alignment accuracy was likely to occur.

In order to solve the above-mentioned problems, the present inventor has thought of pasting both of them in advance and then pressing.

However, in this case, as shown in FIGS. 8 and 9, the urethane foam layer in the vicinity of the cut portion is strongly compressed at the time of cutting (punching), so that it cannot be sufficiently elastically recovered and is dented, or It was found that there is a problem that the urethane foam layer in the vicinity of the portion is displaced in the surface direction and the cut end of the urethane foam is displaced, and so-called sink marks and protrusions occur.

Furthermore, it has been found that it is difficult to cut out only the urethane foam layer when such a urethane foam layer is attached in advance and a surface elastic multilayer plate is produced and then pressed. Needless to say, the urethane foam layer may be cut out in advance and then attached, but it has been found that this measure causes a positional deviation between the cutout portion and the press portion. The present invention has been made in view of these problems, and provides an apparatus suitable for manufacturing a surface elastic multilayer member having a predetermined shape from a surface elastic multilayer plate made of a metal plate to which an elastic layer is attached. That is the purpose.

[Means for Solving the Problems] A cutting device for a surface elastic multi-layer plate according to the present invention is a pair that sandwiches a surface elastic multi-layer plate made of a metal plate having an elastic layer adhered on at least one main surface with a predetermined clamping pressure. The sandwiching member and a cutting blade that reciprocates along the cutting-side end surface of the sandwiching member to cut the surface elastic multilayer plate, the sandwiching member on the elastic layer side is provided on the cutting-side end surface. It is characterized by having a concave portion in close proximity.

An elastic layer notch device for a surface elastic multilayer plate of the present invention is a pair of sandwiching members for sandwiching a surface elastic multilayer plate made of a metal plate having an elastic layer attached to at least one main surface thereof at a predetermined sandwiching pressure, It is characterized in that it is provided with a member for reciprocating along the guide side end surface of the holding member and selectively melting and removing a predetermined portion thereof by pressing on the elastic layer.

In a preferred mode, one of the sandwiching members is a fixed mold and the other is a movable mold, and the cutting blade and the iron member are operated in synchronization with the movable mold.

By doing so, it is possible to manufacture the surface elastic multilayer member having the elastic layer cutout portion at once by one reciprocating motion of a single device, and it is possible to significantly reduce the device configuration and the process compared with the conventional process. Become.

[Operation] For simplicity of explanation, an elastic layer is attached to the lower surface of the surface elastic multi-layer plate, and the holding member horizontally holds the surface elastic multi-layer plate.

First, the cutting device of the present invention will be described.

The cutting blade is assumed to cut the surface elastic multilayer plate vertically from above.

When the cutting blade is pressed against the metal plate from above to cut the metal plate, the elastic layer sandwiched between the lower sandwiching member and the metal plate immediately below the cutting blade becomes stronger due to the pressure of the cutting blade. Compressed. As a result of this compression, the elastic layer tries to escape, and one half of the elastic layer escapes into the recess with the cutting side end surface of the lower holding member as a boundary. Further, the other half of the elastic layer does not have a lower sandwiching member, and thus can freely escape (cut). That is, since the elastic layer does not escape in the horizontal direction beyond the end face for cutting (does not compressively deform), sink marks do not occur after cutting. Further, since the elastic layer escapes into the concave portion, the elastic layer near the cut portion is not plastically deformed by the compression.

On the other hand, when such a recess is not provided, the elastic layer tries to escape at the time of cutting, but one half of the elastic layer is sandwiched by the lower sandwiching member and the metal plate, and the elastic layer on this side is difficult to escape. Further, the other half of the elastic layer is not sandwiched by the sandwiching member on the lower side, so that it can escape. For this reason, the elastic layer is cut away in the horizontal direction away from the lower holding member, which causes so-called sink marks. Further, the above-mentioned plastic deformation will occur.

Next, the elastic layer notch device of the present invention will be described.

With the pair of sandwiching members sandwiching the surface elastic multilayer plate, the trowel member is pressed against the elastic layer by the guide of the sandwiching member, thereby forming a notch of a predetermined shape in the elastic layer.

[Embodiment] FIG. 1 shows an embodiment of a cutting device for a surface elastic multilayer plate of the present invention.

First, the surface elastic composite plate 4 to be cut will be described.

The surface elastic composite plate 4 is made of a steel plate 43 having urethane foam layers 41 and 42 attached to both main surfaces. The urethane foam layers 41 and 42 are made of ether-based and ester-based urethane foams, and are coated with an acrylic adhesive. The thickness of the urethane foam layers 41 and 42 is 6 mm, its specific gravity is 0.05, the material of the steel plate 43 is SECC-20, and its thickness is 0.6 mm.
Is set to.

Next, the cutting device will be described.

This cutting device constitutes a cutting part of a pressing device, and is a vertical fixed mold (one of a pair of sandwiching members in the present invention) 1 on the lower side and a fixed gap above the fixed mold 1 with a predetermined gap. From a movable mold (the other of the pair of clamping members in the present invention) 2 that is movable, and a cutting blade 3 that is vertically movable adjacent to the guide side end surface 22 of the movable mold 2. Become. Reference numeral 12 is a cutting side end surface of the fixed mold.

The flat clamping surfaces 11 and 21 of the fixed mold 1 and the movable mold 2 face each other with the surface elastic multilayer plate 4 interposed therebetween.

The fixed mold 1 has a trapezoidal groove (a recess in the present invention) 13 which is close to and parallel to the cutting side end face 12. As shown in the enlarged view of FIG. 4, one end of the groove 13 is inclined from the intersection C with the side end face 12 at a shallower first oblique angle 1 (slope 131) and then deeper from the inflection point K. Is inclined at an inclination angle of 2 (slope 132) and reaches a flat bottom 133.

The angle of inclination is preferably 25 to 35 degrees. When the inclination angle 1 is small, sink marks are likely to occur, and when the inclination angle 1 is large, the intersection point P is likely to be dull.

The length of the slope 131 is preferably 2 to 4 mm. If the slope 131 is long, sink marks are likely to occur, and if the slope 131 is short, the strength of the wall portion 14 between the slope 131 and the cutting side end face 12 is reduced.

The width W of the groove 13 is preferably 8 to 12 mm at the opening surface.
If the width is narrow, sink marks are likely to occur, and if the width is wide, undesirable plastic deformation is likely to occur on the steel plate 43. In this embodiment, it is 10 mm.

The depth of the groove 13 is preferably 1 to 3 mm. If the depth is shallow, sink marks are likely to occur, and if the depth is deep, the strength of the wall portion 14 is reduced. In this embodiment, it is 3 mm.

Next, the cutting operation of this device will be described.

First, the surface elastic multilayer plate 4 is inserted between the two molds 1 and 2 (see FIG. 1), and then the movable mold 2 is driven by the presser so that the surface elastic multilayers are moved by the two molds 1 and 2. The plate 4 is clamped with a predetermined clamping pressure (see FIG. 2). Next, the cutting blade 3 is driven by the press along the side end faces 22 and 12 to cut the surface elastic multilayer member having a predetermined shape from the surface elastic multilayer plate 4 (see FIG. 3). As shown in FIGS. 2 and 3, the compression and horizontal displacement of the lower urethane foam layer 42 at the time of cutting are absorbed and relaxed by the escape of the urethane foam layer 42 into the recess 13 and, therefore, after cutting. The sink mark (see FIG. 9) does not occur.

Further, the cutting edge angle α (see FIG. 2) of the cutting edge portion 31 of the cutting blade 3 is
It is preferable to make it at 50 to 70 degrees. In this embodiment, the cutting edge angle α is designed to be 60 degrees.

By doing this, the sharpness of the urethane foam layers 41, 42 is improved. However, when the cutting edge angle α is 45 degrees or less, the cutting edge life is shortened due to the cutting of the steel sheet, and when the cutting edge angle α is 80 degrees or more, the disadvantage of urethane foam protrusion becomes remarkable.
Further, the clearance between the cutting side end surface 22 of the movable mold 2 and the cutting blade 3 is set to 10 to 50 μm to prevent the foam from protruding.

Next, a method of manufacturing the surface elastic multilayer member using the cutting device of this embodiment will be described with reference to FIG.

The steel plate coil 51 is rotationally driven by the steel plate supply position 5 and is periodically sent for a predetermined distance. The bent steel plate coil 5 is corrected by the leveler 6 and then sent to the sticking device 7.

The sticking device 7 has a pair of upper and lower urethane foam coils 71, and these urethane foam coils are periodically sent by a urethane foam coil driving device 73 for a predetermined distance. The pasting device 7 is a pair of release paper winding device 72 and a feeding device.
The feeding device 74 is provided with 74, and feeds the surface elastic multi-layer plate 8 made of a steel plate having urethane foam layers adhered on both sides to the pressing device 9. The pressing device 9 presses (plasticizes and punches) the surface elastic multilayer plate 8 to form a surface elastic multilayer member having a predetermined shape.

An enlarged cross-sectional view of the main part of the press machine 9 is shown in FIGS. 6 and 7, and a surface elastic multilayer member is shown in FIG.

FIG. 6 shows a state before dissolution.

In the movable mold 2, two members 201 and 202 are vertically joined,
The members 201 and 202 are provided with vertical through holes 203. The vertical through hole 203 has a heat shield tube 204 made of a ceramic cylinder.
Is stuck. The upper flange 205 of the heat shield tube 204 is a member
It is sandwiched between 201 and 202, and a slide hole 207 is provided in the center of the bottom portion 206 of the heat shield tube 204.

An iron member 300 is housed inside the heat shield tube 204 so as to be vertically slidable, and a spring 208 presses the iron member 300 downward.

The trowel member 300 includes an upper cylinder portion 310 and a lower cylinder portion 311 which are provided in the heat shield cylinder 204 so as to be vertically slidable and pressed downward by a spring 208, and the lower cylinder portion 311 is internally heat-insulated with a protrusion. Tube
Has 312.

A movable part, which will be described later, is housed in the upper cylinder part 310 and the lower cylinder part 311 so as to be vertically slidable.

This movable portion is composed of a central heater cylinder 301, a pressing cap 302 capped on the lower portion of the heater cylinder 301, and a heat insulating cylinder 303 with a projection fitted on the upper outer peripheral surface of the heater cylinder 301.
03 is fitted in a heat insulating tube 312 with protrusions.

In addition, the pressing cap 302 is provided on the bottom of the lower tube portion 311 and the heat insulating tube.
It is fixed by the upper cylinder portion 310 via 303.

The spring 313 has a function of improving the adhesion between the heater cylinder 301 having a built-in nichrome wire and the metal pressing cap 302 and absorbing a part of the excess stroke of the movable mold 2, and the spring 208 is a movable metal. It has a function of absorbing the rest of the excess stroke of the mold 2.

Next, the operation of the cutout device will be described.

The heater cylinder 301 is assumed to be sufficiently heated.

When the movable mold 2 descends, the pressing cap 302 presses and melts the upper urethane foam layer 41, and as a result, the notch portion 400 having a predetermined shape is formed in the urethane foam layer 41. (See FIG. 7).

Here, the inner peripheral surface of the heat shield tube 204 constitutes the guide side end surface in the present invention.

What is important in this embodiment is that the lower end surface (pressing surface) of the pressing cap 302 has a projecting edge 309 protruding downward at the peripheral edge thereof.

Therefore, when the pressing cap 302 descends, first the protrusion 3
Since 09 melts the urethane foam layer 41, and the outer peripheral surface of the projecting edge 309 is vertical and the inner circumferential surface is inclined, the melted melt is transferred by the projecting edge 309 in the direction of the axis M, and burrs are generated. It is possible to prevent adhesion to the wall surface of the cutout portion.

The iron member may be provided on the fixed mold 1 side.
However, in this case, it is necessary to drive the fixed mold 1 or the trowel member.

By the way, in the case of using soft urethane foam, the hand-applied product of the conventional method requires an adhesive application amount of 70 g / m ² , whereas in this embodiment it is 42 g / m ² and even if it is reduced by about 40%, the steel plate And the adhesive strength of the foam were the same.

As described above, according to the method for manufacturing a surface elastic multilayer member of the above-described embodiment, the plastic lowering, the cutting, and the notch of the urethane foam layer can be performed at once by one lowering operation of the movable mold 2. In addition, the positioning accuracy is high, and excellent productivity can be exhibited.

That is, in the conventional press working, a lubricating oil is applied to a steel plate, then oil is removed from a steel plate member cut into a predetermined shape, and then a urethane foam tape laminated with an adhesive and release paper is predetermined. A surface elastic multilayer member with a predetermined shape can be obtained by simply pressing the surface elastic multilayer plate without the need for complicated processes such as cutting into a shape, finally peeling off the release paper, and then attaching urethane foam to the steel plate. Can be obtained. Note that the application of the lubricating oil can be omitted here because the urethane foam layer is attached.

[Effects of the Invention] As described above, in the cutting device for a surface elastic multilayer plate of the present invention, one of the sandwiching members has the concave portion in the vicinity of the cutting side end surface thereof, so that there is no sink mark. It becomes possible to cut the surface elastic multilayer plate, and as a result, the manufacturing process of the surface elastic multilayer member can be drastically simplified while ensuring excellent finishing accuracy.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a cutting device of the present invention, FIGS. 2 and 3 are sectional views for explaining a cutting operation of a surface elastic multilayer plate, and FIG. Part enlarged sectional view, 5th
The figure is a schematic explanatory view of a surface elastic multilayer member manufacturing apparatus using this cutting device, FIGS. 6 and 7 are cross-sectional views of a urethane foam melting device incorporated into a press device, and FIG. 8 is a processed surface elastic multilayer layer. FIG. 9 is a perspective view of a member, FIG. 9 is a sectional view of a main part of a conventional cutting device, FIG. 10 is a sectional view of an example of a cut surface elastic multilayer member, and FIG. 11 is a schematic explanation showing a conventional manufacturing process. It is a figure. 1 …… Fixed mold (clamping member) 2 …… Movable mold (clamping member) 3 …… Cutting blade 4 …… Surface elastic multi-layer member 13 …… Slit groove (concave) 41, 42 …… Urethane foam layer ( Elastic layer) 43 …… Steel plate 300 …… Trowel member

Claims (3)

[Claims] 1. A pair of sandwiching members for sandwiching a surface elastic multi-layer plate made of a metal plate having an elastic layer attached to at least one main surface under a predetermined sandwiching pressure, and reciprocating along a cutting side end face of the sandwiching member. A cutting blade that moves to cut the surface elastic multilayer plate, wherein the sandwiching member on the elastic layer side has a recess close to the cutting side end face of the surface elastic multilayer plate. Cutting device. 2. A pair of sandwiching members for sandwiching a surface elastic multi-layer plate made of a metal plate having an elastic layer adhered on at least one main surface under a predetermined sandwiching pressure, and reciprocating along guide-side end faces of the sandwiching members. An elastic layer cutout device for a surface elastic multi-layer plate, comprising: a member that moves and presses against the elastic layer to selectively dissolve and remove a predetermined portion thereof. 3. The surface according to claim 1, wherein one of the sandwiching members is composed of a fixed mold and the other is composed of a movable mold, and the cutting blade and the trowel member can operate in synchronization with the movable mold. Pressing device for elastic multilayer boards.