JP3811830B2 - Hot press molding of vehicle interior materials and cutout molding device for openings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, for example, when manufacturing roofing etc., the skin material is pressed and bonded to the plate surface of the lining substrate with heat by a molding die, and the workpiece is pressed into a predetermined three-dimensional shape. Related to hot press forming of vehicle interior materials and opening forming apparatus for openings applied to a workpiece with a cutter provided with a molding die having parts such as lamps and sunroof windows It is.
[0002]
[Prior art]
In general, in order to manufacture roof linings for vehicles, a skin material and a lining substrate such as corrugated cardboard are hot-treated with a molding die to press-bond the skin material to the plate surface of the lining substrate, and the work material is predetermined. It is usually manufactured in two steps: after pressing into a three-dimensional shape, the openings equipped with parts such as room lamps and sunroof windows are cut into the plate surface of the workpiece using a cutter in a separate process. It is.
[0003]
The manufacturing process can be simplified in terms of process if the skin material is pressed and bonded to the plate surface of the lining substrate with a molding die, and at the same time the opening is cut and molded with a cutter provided in the molding die. .
[0004]
As the molding die, an upper die 1 having a convex pad portion 1a as shown in FIG. 8 and a spring 2a that can be displaced downward by a pressure accompanying a downward movement of the upper die 1 are elastically pressed. A lower die 2 having a supported concave pad portion 2b, and the upper die 1 is provided with a receiving pad 1b for the blade edge 3a, and the lower die 2 is provided with a cutter body 3b with the blade edge 3a facing upward. It is possible to use one provided with the cutter 3 on the plate surface of the surface plate 2d by positioning so as to be received by the through hole 2c provided in the pad portion 2b.
[0005]
In the molding die, the skin material H is placed on the plate surface of the lining substrate D by lowering the upper die 1 while superposing the skin material H on the plate surface of the lining substrate D placed on the pad portion 2b of the lower die 2. While pressing and bonding by hot processing by the pad portions 1a and 2b, the processed material is press-molded into a predetermined three-dimensional shape, and at the same time, the pad portion 1a of the upper die 1 presses the pad portion 2b of the lower die 2. The cutting edge 3a of the cutter 3 protrudes from the through hole 2c of the pad portion 2b between the mold surfaces in accordance with the displacement of the pad portion 2b, so that the opening is cut and formed on the plate surface of the workpiece by the cutter 3. Can be.
[0006]
However, since the pad portions 1a and 2b are thermally expanded with the hot processing in the mold, the pad 3b of the lower die 2 has the cutter 3 even if thermal expansion occurs as shown in FIG. A clearance G must be provided in the through hole 2c as a clearance space that can move inside the through hole 2c.
[0007]
However, even if the hole diameter of the through hole 2c is set by taking the gap G, the thermal expansion coefficient of each pad portion 1a, 2b is not always constant. It becomes impossible to guide. For this reason, the situation where the opening position cut out by the blade edge of the cutter 3 varies or the opening edge is deformed easily occurs.
[0008]
[Problems to be solved by the invention]
According to the present invention, even when the lower mold pad portion is thermally expanded due to the hot processing of the molding die, the cutter provided on the lower mold side can be accurately guided to move by the lower mold pad portion, and is cut out by the blade edge of the cutter. It is an object of the present invention to provide a hot press forming and opening cut-out forming device for an interior material for a vehicle which can reliably prevent the opening position from varying or the opening edge from being deformed.
[0009]
[Means for Solving the Problems]
In the apparatus for hot pressing molding and opening of a vehicular interior material according to claim 1 of the present invention, the cutter has a cutting edge formed in a frame-like pointed shape smaller than the outer periphery of the cutter body, and the cutting edge. There is a notch step on the outer periphery, and the cutter body is inserted and held in a cylindrical holder. A through hole is opened in the mold surface from the lower surface of the pad, and the cylindrical holder is inserted into this through hole. The step space that is fitted and fixed and that receives the cutter body is extended from the cylindrical end of the holder, so that the area near the cutting edge that contacts the through hole is reduced, and the hole edge on the mold surface side of the through hole The blade edge of the cutter is guided in sliding contact, and the blade edge of the cutter projects between the mold surfaces as the pad portion is displaced downward.
[0010]
In the hot press molding and opening cut-out forming device for the vehicle interior material according to claim 2 of the present invention, the cutter is elastically pressed by a spring interposed between the lower side of the pad portion and the lower collar portion of the cutter. An end block that supports and supports the lower collar portion of the cutter with a guide bar that rises from the lower side of the pad portion so as to be movable up and down, and further contacts the lower collar portion of the cutter when the pad portion is displaced downward Is mounted on the lower mold surface plate and directly assembled to the lower mold pad portion.
[0011]
In the hot press molding and opening cut-out forming device for the vehicle interior material according to claim 3 of the present invention, the cutter is configured to be slidably held by a bush provided in the cylinder of the holder.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the following, referring to FIGS. 1 to 7, in FIG. 1, a corrugated board or the like is used as a lining substrate D, and a skin material H is bonded to the plate surface of the lining substrate D by hot processing, and the material to be molded is specified. A molding die for manufacturing a roof lining for a vehicle by press molding into a three-dimensional shape is shown.
[0013]
The mold includes an upper mold 10 that can be moved up and down and a lower mold 11 on which the workpieces D and H are placed. Further, the lower mold 11 is provided with a cutter 12 that cuts and forms an opening portion used for mounting a part such as a room lamp or a window for a sunroof on the plate surfaces of the workpieces D and H.
[0014]
The upper mold 1 is provided with a convex pad portion 10a that presses the workpieces D and H facing downward from the plate surface of the surface plate 10b. The pad portion 10a is provided with a blade receiving pad 10c made of urethane foam, stainless steel plate or the like that receives the cutting edge of the cutter 12 so as to face the mold surface. The upper die 10 is provided with a plurality of positioning bars 10d for restricting the clamping position so as to protrude downward near the corners of the plate surface of the surface plate 10b.
[0015]
The lower die 11 includes a concave pad portion 11a on the plate surface of the surface plate 11b for press-molding the workpieces D and H into a predetermined three-dimensional shape from the pad portion 10a of the upper die 10. The pad portion 11a is elastically supported by a spring 11c interposed between the lower surface and the surface plate 11b so that the pad portion 11a can be displaced downward by being pressed by the pad portion 10a as the upper mold 10 moves downward.
[0016]
The pad portion 11a is provided with a through hole 11d used to equip the cutter 12 so as to open from the lower surface to the mold surface. The lower mold 11 is provided with a boss groove (not shown) that fits with the positioning bar 10d of the upper mold 10 on the upper end surface of the mold 11e.
[0017]
Examples of the cutter 12 include those used to cut out and form an opening for room lamp equipment. As shown in FIG. 2, the cutter 12 has a substantially cylindrical cutter body 12a capable of discharging chips, and a sharpened cutting edge 12b having a frame shape by chamfering the inside of the cylinder in a tapered shape on the upper end side. Is provided.
[0018]
So that the cutter 12 to reduce the contact area between the through hole 11d of the pad portion 11a as will be described later, the cutting edge 12b as shown by enlarged in FIG 3 the small framed W ₂ than the outer peripheral W ₁ of the cutting body 12a A notch step portion 12c is provided on the outer peripheral portion near the cutting edge 12b so as to be exhibited. Further, the cutter 12 has a lower collar portion 12d, and a cylindrical cutter body 12a is integrally formed by rising from the lower collar portion 12d.
[0019]
As shown in FIG. 4, the cutter 12 is held by a holder 13 that is fitted and fixed in the through hole 11d of the lower mold 11 with the cutting edge 12b facing upward. The holder 13 is provided with a cylindrical shape capable of holding the cutter 12 by inserting the cutter body 12a into the cylinder.
[0020]
The holder 13 has a retaining hook 13a that is fixed to the pad 11a of the lower mold 11 at the lower surface. The holder body 13b rises from the retaining hook 13a and fits into the through hole 11d of the lower mold 11 to be fixed. Is integrally formed in a cylindrical shape. The holder 13 is provided with an oilless bush 14 that slidably supports the cutter 12 by being fitted into a cylinder of the holder main body 13b.
[0021]
With respect to the holder 13, the cutter 12 is fitted with a coil spring 15 as shown in FIG. 4 on the outer periphery of the cutter main body 12 a, and the coil spring 15 is interposed between the holder 13 and the retaining bar 13 a so as to be elastically biased. It is supported freely.
[0022]
In addition, the cutter 12 is supported by a guide bar 16 that is inserted into the retaining bar 13a of the holder 13 so as to be movable up and down. The guide bar 16 has the head portion 16a positioned below the lower collar portion 12d and the axial portion 16b inserted through the plate surface of the lower collar portion 12d. The upper end side of the axial portion 16b is connected to the retaining collar portion 12d of the holder 13. It is planted and fixed to the pad portion 11a of the lower mold 11 by being screwed into the pad portion 11a of the lower mold 11.
[0023]
An end block 17 is provided on the surface plate 11b of the lower mold 11 so as to come into contact with the lower collar portion 12d of the cutter 12 in accordance with the downward displacement of the pad portion 11a. This end block 17 is equipped so that the cutting edge 12b of the cutter 12 protrudes from the through hole 11d of the pad portion 11 between the mold surfaces against the coil spring 15 with the downward displacement of the pad portion 11a. The end block 17 is provided with a discharge hole 17a for dropping chips cut by the cutting edge 12b of the cutter 12.
[0024]
Further, a step space 18 for receiving and guiding the cutter 12 by the cutter body 12 a is provided in the through hole 11 d of the pad portion 11 a so as to extend upward from the cylindrical end of the holder 13 with respect to the cutter 12. Since this stepped space 18 is provided, the cutter 12 comes into contact with the through hole 11d with an area close to the blade edge 12b formed in the frame smaller than the cutter body 12a, and the edge of the through hole 11d passes through the blade edge 12b. It can be equipped so that it can slide-guide.
[0025]
In the hot press molding / opening cutout forming apparatus for the vehicle interior material configured as described above, the upper mold 10 is mounted after the skin material H and the lining substrate D are stacked and placed on the pad portion 11a of the lower mold 11. When it moves downward, the skin material H can be bonded to the lining substrate D by pressing the workpieces H, D between the pad portions 10a, 11a, and they can be pressed into a predetermined three-dimensional shape. . In the press molding of the workpieces H and D, hot processing is performed by heating the pad portions 10a and 11a.
[0026]
The pad portions 10a and 11a are thermally expanded along with the hot treatment, but the pad portion 11a of the lower mold 11 is fixed by fitting the cylindrical holder 13 into the through hole 11d. The thermal expansion of 11 a is suppressed by the holder 13 and is caused to expand outward from the holder 13. Therefore, the cutter 12 can be slidably held in the cylinder of the holder 13 without being affected by thermal expansion.
[0027]
Further, even when the cutter 12 is directly assembled to the pad portion 11a of the lower mold 11, the cutter 12 itself is only in contact with the through hole 11d of the pad portion 11a in the step space 18 with a small area near the blade edge 12b. It is possible to suppress heat transfer.
[0028]
As the upper die 10 moves downward and presses the workpieces D and H, as shown in FIG. 5, the pad portion 10a of the upper die 10 opposes the pad portion 11a of the lower die 11 against the spring 10c. It is displaced downward by pressing. The cutter 12 is also lowered together with the pad portion 11 a of the lower mold 11, and the lower collar portion 12 d of the cutter 12 comes into contact with the end block 17.
[0029]
From this state, when the upper die 10 is completely lowered and the workpieces D and H are pressed by the pad portions 10a and 11a, the cutter 12 is pressed by the end block 17 as shown in FIG. The blade edge 12b is protruded between the mold surfaces from the through hole 11a of the pad portion 11b. When the cutting edge 12b of the cutter 12 reaches the blade receiving pad 10c of the upper mold 10 as shown in FIG. 7, an opening for mounting parts such as a room lamp is provided on the plate surface of the workpieces D and H. Can do. At the same time, the workpieces D and H can be formed into a predetermined three-dimensional shape.
[0030]
The cutter 12 can move smoothly because the cutter body 12a is slidably supported by the oilless bush 14. Also. Since the cutter body 12a is slidably guided in the step space 18 and the edge near the blade edge 12b is guided by the opening edge of the through hole 11d, the blade edge 12b of the cutter 12 accurately protrudes toward the workpieces D and H. You can make it.
[0031]
In particular, since the cutter 12 is directly assembled to the pad portion 11a of the lower mold 11, the blade portion 12b is accurately synchronized with the pad portion 11a being displaced downward by the spring 11c so that the blade edge 12b is passed through the pad portion 11a. It can be made to protrude from 11d. Therefore, there is no occurrence of displacement of the opening portion to be cut and formed by the cutting edge 12b or deformation of the opening edge.
[0032]
In addition, although the roof lining was exemplified as the vehicle interior material described above, other parts such as a door lining, a body side lining, an instrument panel, a rear tray garnish and the like are provided on the plate surface with openings for parts. The present invention can also be applied to manufacture various types of vehicle interior materials.
[0033]
【The invention's effect】
As described above, according to the hot press forming and opening forming apparatus for the vehicle interior material according to claim 1 of the present invention, the cutter for forming the opening on the plate surface of the workpiece with the holder is formed by the holder. Since it is held and prepared in the pad part of the lower mold, even if the pad part of the lower mold expands due to hot treatment, the influence of the lower pad part on the cutter can be prevented by the holder and the cutter can be moved accurately. . In that case, since the area which contacts the through-hole of a pad part can be decreased, it can suppress that a cutter receives a thermal influence.
[0034]
According to the hot press forming and opening cut-out forming apparatus for the vehicle interior material according to claim 2 of the present invention, the lower die pad portion is displaced downward by assembling the cutter directly to the lower die pad portion. The cutter can be moved accurately in synchronism with the operation.
[0035]
According to the hot press molding and opening device of the vehicle interior material according to claim 3 of the present invention, the cutter can be moved smoothly and accurately by holding the cutter slidably with the bush. You can do that.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a partially cutaway front view showing a hot press forming and opening cutout forming apparatus for a vehicle interior material according to the present invention as a whole.
FIG. 2 is a developed perspective view showing a cutter provided in the molding apparatus and a peripheral mechanism of the cutter.
FIG. 3 is a partially enlarged sectional view showing a cutter equipped in the molding apparatus and a peripheral mechanism of the cutter.
FIG. 4 is a partially enlarged sectional view showing the molding apparatus before operation.
FIG. 5 is a partially enlarged cross-sectional view showing the molding apparatus during operation.
FIG. 6 is a partially enlarged cross-sectional view showing the molding apparatus when operation is completed.
FIG. 7 is a partial enlarged cross-sectional view showing the periphery of the cutter blade edge when the operation of the molding apparatus is completed.
FIG. 8 is an explanatory view of an entire mechanism showing a hot press forming and opening cutting device for a vehicle interior material that is generally assumed.
FIG. 9 is an explanatory view showing a problem of the molding apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Upper mold | type 10a Upper mold | type pad part 11 Lower mold | type 11a Lower mold | type pad part 11c Spring 11d Through-hole 12 Cutter 12a Cutter 12b Cutting edge 12c Notch step part 12d Lower collar part 13 Holder 14 Bush 15 Spring 16 Guide bar 17 End block 18 Step space D, H Work material

Claims (3)

The vehicle interior material is heated into a predetermined three-dimensional shape from an upper mold that can be moved up and down and a lower mold that has a pad portion that is elastically supported by a spring so that it can be displaced downward by a pressure accompanying a downward movement of the upper mold. It is a mold for press molding, and a lower mold is provided with a cutter that cuts and molds an opening for parts equipment on the plate surface of the vehicle interior material.
The cutter has a cutting edge formed in a frame-shaped pointed shape smaller than the outer periphery of the cutter body and has a notch step portion on the outer peripheral portion near the cutting edge, and is held by inserting the cutter body into a cylindrical holder,
A through hole is opened in the mold surface from the lower surface of the pad part, a cylindrical holder is fitted and fixed in this through hole, and a step space for receiving the cutter body is provided extending from the cylindrical end of the holder. The area near the cutting edge that comes into contact with the through hole is reduced, and the cutter blade edge is slidably guided by the hole edge on the mold surface side of the through hole. A device for hot pressing molding of an interior material for a vehicle and a cut-out molding device for an opening, characterized in that the projection is projected into the vehicle.   The cutter is elastically supported by a spring interposed between the lower side of the pad portion and the lower collar portion of the cutter, and the cutter's lower collar portion can be moved up and down by a guide bar standing from the lower side of the pad portion. Further, an end block is provided on the lower platen that comes into contact with the lower collar portion of the cutter as the pad portion is displaced downward, and is directly assembled to the lower die pad portion. Item 2. A hot press forming and opening forming apparatus for an interior material for a vehicle according to Item 1.   3. The apparatus for hot press molding of an interior material for a vehicle and a cut-out molding device for an opening according to claim 1 or 2, wherein the cutter is slidably held by a bush provided in a cylinder of a holder.

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