JPH06143191A - Trim cutting method for interior trim part - Google Patents

Abstract

PURPOSE:To perform neat terminal processing of an interior trim part by a method wherein a cut end face is inclined at a given angle with a vertical surface by utilizing restoration operation applied on a cut part in a way that trim cut processing is applied in a state that the tip part of a terminal flange is pushed up based on a cut part for deformation. CONSTITUTION:When a roof trim 10 before trim cut processing is set, a terminal flange part 14 on the rear side is set on the mold surface of a bottom mold 30 in a state wherein the terminal flange part is deformed from a chain line position to a solid line position, as shown in a figure, based on a cut scheduled part by means of a flange pushing-up part 32. A top mold 40 is lowered toward the bottom mold 30 and the base part of the terminal flange part 14 on the rear side is cut by means of a trim cut blade 41. Thereafter, by removing the roof trim 10 on which trim cut processing is already applied from the bottom mold 30 after the top mold 40 is raised, a restoration force is exerted on the cut part of the terminal flange part 14 on the rear side of the roof trim 10. A cut end face is formed opposite to the back side such that the cut end face forms an slope having an angle of approximate 40 deg. with a vertical surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim cutting method for an interior part such as a roof trim, which can be easily and inexpensively performed on an outer peripheral trim of an interior part for an automobile and has a good-looking end part.

[0002]

2. Description of the Related Art Usually, an automobile interior part such as a roof trim is composed of a laminated structure in which a surface material of a base material formed into a required shape is covered with a skin material such as cloth. A trim cut process is performed on the car body according to the outer shape of the vehicle body panel.

For example, a roof trim 1 shown in FIGS. 9 and 10 integrally press-molds a base material 2 such as a PPO (abbreviation of polyphenylene oxide) resin foam, resin felt, corrugated board and a skin material 3 such as cloth. In the case of the roof trim 1, the front edge portion 1a is formed by
Is wound on the back surface side of the base material 2, but the rear end edge portion 1b side is not normally wound, and is left uncut.

That is, as shown in FIG. 11, the roof trim 1 is set on the lower mold 4 with the skin material 3 on the upper side, and the trim cutting blade 6 provided on the upper mold 5 sets a desired rear edge line. The cutting process is performed along the line.

[0005]

As described above, in the interior parts such as the roof trim 1 and the like, when the trim cut processing is performed by the secondary processing after the interior parts are molded, conventionally, the upper mold 5 is used.
The trim cutting blade 6 provided on the upper die 5 is vertically lowered by the descending operation of the above to perform the end treatment, so that the cutting edge 2a of the base material 2 stands out to the outside as shown in FIG. Has become.

[0006] As described above, in reality, the cut wood opening 2a of the base material 2 is conspicuous along the rear side end portion 1b of the roof trim 1 from the inside and outside of the vehicle, and the aesthetics of the interior is significantly deteriorated.

In order to cut the rear flange portion in an oblique direction so that the cutting edge is not conspicuous, a cam slide die is required for the upper die 5, which raises the die cost, resulting in a secondary processing cost. However, there is a problem that the product cost is increased because of the bulkiness.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple trim cutting method for an interior part including a laminated structure of a core material and a skin material. An object of the present invention is to provide a trim cut method for an interior part, which uses a trim cut mold so that the cut edge of the base material is not conspicuous to the outside and the end treatment of the interior part can be performed beautifully.

[0009]

In order to achieve the above object, the present invention provides a trim cutting method for an interior component, which comprises a skin material adhered to a surface of a base material, and a flange at one side edge portion of the interior component. Push the flange tip side up to the skin material side based on the cutting part to deform and set it in the lower mold, and cut and cut this flange with the cutting blade provided in the upper mold,
It is characterized in that the cut end face is opposed to the back side by the restoring action of the cut portion.

[0010]

As apparent from the above construction, the end flange portion to be trim-cut is in a state in which the end of the end portion of the end flange portion is lifted to the skin material side (front surface side) based on the cut position and is deformed in the inclined shape at the predetermined angle. Since trim cut processing is performed with, the restoring force that tries to return to the original position acts on the cutting part after trim cutting processing, and the cut wood mouth surface is vertical with respect to the vertical plane according to the inclination angle in the set state. It becomes an inclined surface that is inclined at a predetermined angle.

Therefore, the cut end face along the trim cut line of the interior part faces the back side and is not conspicuous to the outside.

[0012]

Embodiments of the trim cutting method for interior parts according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of an automobile roof trim manufactured by applying the method of the present invention as seen from the inside, FIG. 2 is a sectional view showing the structure of the automobile roof trim, and FIGS. 6 to 8 are sectional views showing the method of the present invention, and FIGS. 6 to 8 are sectional views showing the steps of yet another embodiment of the method of the present invention.

1 and 2, an automobile roof trim 10 manufactured by applying the method of the present invention has a PPO resin base material 11 and a skin material 12 integrally attached to the surface side thereof.
It is composed of and.

Further, the PPO resin base material 11 is made of PP.
The PPO resin skin layer 1 is formed on the front and back surfaces of the O resin foam layer 11a.
1b is formed by stacking, and P in the present embodiment is
The PO resin is not pure PPO but is modified with polystyrene in consideration of cost and the like.

Further, the PPO resin base material 11 of this embodiment is
The weight of the PPO resin foam layer 11a is 500 to 600 g.
/ M ² , the thickness of the PPO resin skin layer 11b is 0.15 mm, and the total thickness of the PPO resin base material 11 is 3.5 mm (raw state). Total thickness of resin substrate 11 is 6-8mm
After being inflated, the PPO resin base material 11 is press-molded so that the total thickness of the PPO resin base material 11 becomes 5 mm by cold press molding into a desired shape.

On the other hand, as the skin material 12, a non-woven fabric is used in this embodiment, and in consideration of the adhesiveness with the PPO resin base material 11, a hot melt film (not shown) is used as the skin material 1.
It is laminated on the 2 side.

Therefore, when cold pressing the PPO resin base material 11, the skin material 12 is integrally formed on the surface side of the PPO resin base material 11 via the hot melt film.

By the way, at the front end edge and the rear end edge of the roof trim 10, terminal flange portions 13 and 14 are formed, respectively.
While the PO resin base material 11 is rolled up on the back surface side, the rear-side terminal flange portion 14 is simply cut off the base material 11 and the skin material 12.

The method of the present invention relates to a trim cutting method for the rear side end flange portion 14 of the roof trim 10.

Referring to FIGS. 3 to 5, first, the trim cutting device 20 used in the method of the present invention is provided with a lower mold 30 for setting the roof trim 10 before trim cutting and a trim cutting blade 41. Lower mold 3 corresponding to the trim cutting blade 41.
0, a receiving recess 31 is formed in a groove shape, and a flange pushing-up portion 32 whose upper surface is located above the mold surface of the lower mold 30 is formed on the outer periphery of the receiving recess 31.

Then, as shown in FIG. 3, when the roof trim 10 before trim cutting is set, the rear side terminal flange portion 14 is moved from the chain line position to the solid line position by the flange push-up portion 32 based on the planned cutting portion. As shown, it is set on the die surface of the lower die 30 in a deformed state (inclined at an angle of about 40 degrees).

Then, as shown in FIG. 4, the upper die 40 is lowered with respect to the lower die 30 so that the rear side end flange portion 14
The base of is cut with the trim cut blade 41.

Then, after the upper die 40 is raised, the lower die 3
By removing the roof trim 10 that has been trim cut from 0, the rear side end flange portion 1 of the roof trim 10
As shown in FIG. 5, the restoring force acts on the cutting portion of No. 4 so that the surface of the cutting edge 15 faces the back side so that the surface of the cutting edge 15 becomes an inclined surface of about 40 degrees with respect to the vertical plane.

Therefore, as shown in the enlarged view of FIG. 2, the cut edge 15 of the roof trim 10 faces the back side only by performing a normal trim cut process with the rear side end flange portion 14 of the roof trim 10 being pushed up and deformed. Since it becomes an inclined surface and the cut end 15 does not stand out to the outside, there is an effect that the appearance of the rear side end flange portion 14 is significantly improved.

Next, FIGS. 6 to 8 show another embodiment of the method of the present invention. The trim cutting device 20 used in this embodiment has a lower mold 30 having a groove-shaped receiving recess 31 and an upper mold. It is a simple trim cut device 20 in which a trim cut blade 41 is attached to each 40.

To apply this trim cut device 20, as shown in FIG. 6, first, when the roof trim 10 is formed, the rear side flange portion 14 is formed in a state of being extended to the position shown by the chain line, When setting in the lower mold 30, the tip portion of the rear side end flange portion 14 is pushed up and set.

Then, in this state, as shown in FIG. 7, the cut portion of the rear side terminal flange portion 14 may be trimmed.

Therefore, as shown in FIG. 8, the product after the trim cut processing is inclined to the back surface side according to the pushing-up angle of the rear side end flange portion 14 due to the restoring action of the cutting opening 15. Similar to the above-described embodiment, the surface of the cut end 15 of the rear side end flange portion 14 of the roof trim 10 does not appear to the outside, and the appearance is extremely good.

In each of the embodiments described above, the method of the present invention is applied to the trim cutting method for the rear side flange portion 14 in the roof trim 10, but the base material 11 is used.
The present invention can be applied to all trim cuts of the interior part 10 including the skin material 12 and the skin material 12. Further, as the material of the base material 11, in addition to the PPO resin base material described in the present embodiment, resin felt, corrugated board, etc. It doesn't matter.

[0031]

As described above, the trim cutting method for the interior parts according to the present invention is applied to the cut portion by performing the trim cut processing in a state where the tip end portion of the terminal flange is pushed up and deformed based on the cut portion. Utilizing the restoring action,
It is possible to incline the cut surface of the cut part by a predetermined angle with respect to the vertical plane, and to make the cut surface of the piece inconspicuous to the outside, and to effect the end treatment of the interior parts beautifully by a simple method.

[Brief description of drawings]

FIG. 1 is a front view of an automobile roof trim to which the method of the present invention is applied, as seen from the inside.

FIG. 2 is a cross-sectional view showing the structure of the automobile roof trim shown in FIG.

FIG. 3 is an explanatory view showing an embodiment of a trim cutting device used in the method of the present invention and showing a state in which a room trim is set in the trim cutting device.

FIG. 4 is a sectional view showing a trim cutting step in the method of the present invention.

FIG. 5 is an explanatory view showing the restoring action of the cut portion after trim cutting by the method of the present invention.

FIG. 6 is an explanatory view showing another embodiment of the trim cut device used in the method of the present invention, showing a state in which the roof trim is set in the trim cut device.

7 is a sectional view showing a trim cutting step in the trim cutting method shown in FIG.

FIG. 8 is an explanatory diagram showing a restoring function of a cut portion after trim cut processing.

FIG. 9 is a front view showing a conventional roof trim.

FIG. 10 is a sectional view showing the structure of a conventional roof trim.

FIG. 11 is a sectional view showing a schematic configuration of a conventional trim cut device.

FIG. 12 is an explanatory view showing a defect in the conventional trim cut method.

[Explanation of symbols]

 10 Automotive Roof Trim 11 PPO Resin Base Material 12 Skin Material 13 Front Side End Flange Part 14 Rear Side End Flange Part 15 Cutting Mouth 20 Trim Cutting Device 30 Lower Mold 31 Receiving Recess 32 Flange Pushup Part 40 Upper Mold 41 Trim Cut Blade

Claims (1)

[Claims] 1. A trim cutting method for an interior part, comprising a surface material (12) attached to a surface of a base material (11), wherein a flange (14) at one side edge of the interior part (10) is cut into a cut part. The flange tip end side is pushed up to the skin material (12) side to be deformed and set in the lower mold (30), and this flange (14) is cut and cut by the cutting blade (41) provided in the upper mold (40). Then, the trim cut method for the interior part, characterized in that the cut mouth (15) surface is made to face the back surface side by the restoring action of the cut portion.