JP6185365B2 - Interior materials for vehicles - Google Patents

Description

  The present invention relates to a vehicle interior material.

  Conventionally, automotive interior materials such as door trims, luggage trims, rear side trims, etc. have excellent surface texture and softness on the surface of the resin core material with mounting rigidity to the body panel and shape retention characteristics. Is used.

  Such a vehicle interior material, for example, sets the skin material in an injection mold that forms the core material, and then supplies the resin for the core material into the mold so that the skin material and the core material are integrated. Obtain intermediate products for vehicle interior materials.

Then, an interior material for a vehicle is obtained by cutting (trimming) a terminal portion (hereinafter simply referred to as “terminal portion”) of an unnecessary skin material in a door pocket portion or a product terminal portion of the intermediate product door trim. Is completed.
Conventionally, as a trimming process of a terminal part, as shown to Fig.1 (a), the part of the terminal part 125 is cut | disconnected with cutters, such as a cutter (for example, patent document 1).
FIG. 1 is an enlarged cross-sectional view showing a part of the door pocket portion of the door trim 100.

At the time of this cutting operation, if the surface material 120 integrated with the surface of the core material 110 is scratched, it cannot be used as a product.
In addition, the skin material used as the skin of the product which should remain on a core material throughout this specification may be described as a product skin material.
Therefore, in the cutting operation shown in FIG. 1 (a), it is necessary to pay attention so that the blade 130 hits the product skin material 120 and no scratches or cuts are generated.

  For this reason, in the cutting operation, the blade edge 135 is inserted in the cutting direction in a point contact state at a point to be cut of the terminal portion 125 so that the blade 130 is not rubbed against the product skin material 120, and such point contact is performed. The blade 130 is run in the cutting length direction while maintaining the insertion state.

JP 2008-149555 A

However, in the cutting operation as described above, since only the blade edge 135 is inserted in a point contact manner, when the blade 130 is run, the blade 130 moves freely up and down (left and right as viewed from the hand). It becomes easier and stable cutting is not possible.
For this reason, when the blade 130 is shaken and the position of the blade edge 135 deviates from a predetermined cutting point, the terminal portion 125 can be left uncut as shown in FIG.

  Then, this invention is made | formed in view of such a situation, and it aims at providing the interior material for vehicles which suppressed the cutting | disconnection remainder of the terminal part of an unnecessary skin material.

In order to achieve such an object, the present invention is grasped by the following configuration.
(1) The vehicle interior material of the present invention includes a core material and a skin material provided on a front side of the core material, and the skin material is formed along a shape of an edge of the core material, and is cut. It has the terminal part processed, The said edge part has a plane part along the cutting direction of the said terminal part, It is characterized by the above-mentioned.
(2) In the configuration of (1), the edge portion has a rounded portion that is smoothly connected to the flat portion.
(3) In the configuration of the above (1) or (2), the flat portion has a width of 0.1 mm or more and 3 mm or less in a sectional view in a die cutting direction.

  ADVANTAGE OF THE INVENTION According to this invention, the interior material for vehicles which suppressed the cutting | disconnection remainder of the terminal part of an unnecessary skin material can be provided.

It is sectional drawing which shows the conventional trimming operation | work. It is a front view which shows the vehicle interior material (door trim) of 1st Embodiment of this invention. It is sectional drawing which shows the trimming operation | work of 1st Embodiment of this invention. It is the sectional view on the AA line of FIG. It is sectional drawing which shows the plane part of 1st Embodiment of this invention. It is sectional drawing at the time of enlarging angle (theta) of a plane part than FIG. It is sectional drawing when angle (theta) of a plane part is made into a negative angle. It is sectional drawing which shows the plane part of 2nd Embodiment of this invention. It is sectional drawing which shows the plane part of 3rd Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings.
Note that the same number is assigned to the same element throughout the description of the embodiment.

A first embodiment of the present invention will be described.
FIG. 2 shows a door trim 90 as an example of the vehicle interior member of the present invention, and is a front view of the door trim 90 as viewed from the vehicle interior side.
In general, a vehicle interior material is formed by providing a skin material on a resin core material having required rigidity and shape retention characteristics.

  The resin for the core material is not particularly limited. For example, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide resin, Polyacetal resins, polycarbonate resins, ionomer resins, acrylonitrile / butadiene / styrene (ABS) resins, and the like can be used.

  Also, the material of the skin material is not particularly limited, but considering the moldability and good pressure bonding to the core material, it is preferable to use a material having air permeability, for example, TPO (thermoplastic olefin) ), A laminated sheet in which a cushion layer such as polyurethane foam, polyethylene foam, or polypropylene foam is laminated on the back surface of the thermoplastic resin sheet can be used.

In the process of forming the door trim 90, first, a skin material is set on the injection mold, and then an intermediate product in which the skin material is integrated on the core material of the door trim 90 shape by supplying a resin as a core material to the injection mold. obtain.
As another method, an intermediate product can be obtained by first forming a core material in the shape of the door trim 90 and sticking a skin material on the core material.
In the present invention, the production method for obtaining the intermediate product may be a general method and is not particularly limited.

In general, the skin material may be heated prior to setting the skin material on the injection mold. However, in the present invention, such heat treatment may be performed as necessary.
In this case, the heating may be performed only on one side of the skin material or on both sides.
Further, the skin material set on the injection mold may be on the cavity mold side or the core mold side of the injection mold.
Furthermore, when a skin having a texture transferred is required, a skin material to which the texture has been transferred may be used. May be transferred, and is not particularly limited.

The door trim 90 is completed by cutting and trimming unnecessary terminal portions of the skin material on the edge 70 such as the door pocket 50 of the intermediate product or the outer periphery 60 of the door trim 90 with a cutter or the like.
Hereinafter, the trimming will be described in detail by taking the door pocket 50 shown in FIG. 2 as an example.

Comparing FIG. 1A and FIG. 3, in the present embodiment, a plane along a cutting direction in which a blade 30 for cutting the terminal portion 25 is inserted on the core 10 side of the cutting point of the terminal portion 25. A portion 15 is formed.
Therefore, when cutting, first, the blade edge 35 is inserted in the cutting direction, and then the blade 30 is allowed to run in the cutting length direction so that the blade edge 35 is along the flat surface portion 15. Since 15 serves as a guide, blurring of the blade 30 and positional deviation of the blade edge 35 are suppressed.
For this reason, the uncut portion of the terminal portion 25 which is generated due to the positional deviation of the blade edge 35 or the like is suppressed, and clean trimming can be performed.

By the way, in general, the door pocket portion is likely to be touched by a finger or the like, and therefore, good touch feeling is required.
For this reason, as shown in FIG. 1, it is often formed into a curved surface shape (hereinafter referred to as “R shape”).
Such an R-shaped portion inserts only the blade edge 135 in a point contact manner, and performs the cutting operation in a state where the blade 130 can freely move to the left and right, so that the blade 130 can be stably run in the cutting length direction as expected. Is difficult.

On the other hand, as shown in FIG. 3, in the present embodiment, the flat portion 15 along the cutting direction in which the blade 30 is inserted is formed on the core material 10 so as to be smoothly connected to the round portion, and the size of the width and the like is also visually recognized. The flat portion 15 has a level that does not give a sense of discomfort to the touch.
And the stable cutting without the blur of the blade 30 and the position shift of the blade edge | tip 35 is realizable by running the blade 30 to a cutting | disconnection length direction so that the blade edge | tip 35 may be along the flat part 15 formed in that way. .
For this reason, in this embodiment, it is possible to suppress the uncut portion of the terminal portion 25 due to the blurring of the blade 30 and the positional deviation of the blade edge 35 even in the R-shaped portion where it has been difficult to perform the conventional cutting operation.

4 is a cross-sectional view taken along line AA of FIG. 2, and in particular, a cross-sectional view of a door pocket portion indicated as B. FIG.
FIG. 4 shows a case where the trimming described with reference to FIG. 3 is performed.
First, as can be seen from FIG. 2, the door pocket portion is in the shape of a hole whose periphery is closed by the core material 10.
In the trimming operation at such a door pocket portion, the blade 30 must be inserted into the hole shape from the hole-shaped opening and moved along the periphery of the hole.
As can be seen from FIG. 4, when the blade 30 is inserted from the hole-shaped opening (upper side in FIG. 4) and the terminal 25 (see FIG. 3) is trimmed, the hand holding the blade 30 and its blade is the core. It becomes a state surrounded by the material 10, and it is not possible to secure a posture (hand position) that facilitates the trimming operation.
And in such a difficult state, the blade 30 must be moved so as to trim the terminal 25 along the inner periphery of the hole shape, so that the blade 30 is likely to be shaken or the blade tip 35 is misaligned. .
If the plane portion 15 of the present invention is provided in a place where such a work space is limited, it is possible to suitably suppress the terminal portion 25 from remaining.

Hereinafter, the plane portion 15 described above will be described in more detail.
FIG. 5 shows a state where there is a lower injection mold 80 in a state before cutting the terminal portion 25 of FIG. Yes.
Moreover, the straight line Q shown in FIG. 5 is a line which shows the horizontal surface orthogonal to this die cutting direction.
As shown in FIG. 5, the plane portion 15 is formed by forming a plane having a width W in a cross section in the die-cutting direction at an angle θ with respect to a horizontal plane.

Hereinafter, the width W and the angle θ will be described in detail.
(Plane width W)
The width W of the flat portion 15 is preferably 0.1 mm or greater and 3 mm or less.
As the width W becomes smaller, the surface width along the blade edge 35 becomes smaller, and the stability of the blade edge 35 during the cutting operation becomes worse.
For this reason, the width W is preferably 0.1 mm or more.

On the other hand, as the width W of the flat surface portion 15 increases, the shape of the flat surface portion 15 is recognized as a tactile sensation when touched with a finger or the like, and a step difference appears. It is not preferable to make the width W of the flat portion 15 too wide at a portion that may be touched with a finger or the like.
Further, even if it is a portion that is not touched with a finger or the like, if the width W of the flat surface portion 15 is increased, naturally, the shape deviates from the basic design before the flat surface portion 15 is provided. It is preferable to make it not too wide because it can be regarded as almost the same as the basic design.
For this reason, the width W of the flat portion 15 is preferably 3 mm or less.

(Plane angle θ)
FIG. 6 shows a case where the angle θ is larger than the state of FIG. 5 (θ1> θ).
Comparing FIG. 5 and FIG. 6, it can be seen that in FIG. 6 where the angle θ is large, the blade 30 is approaching while standing on the core material 10 side.
When the blade 30 runs in the cutting length direction for cutting, the angle θ is rubbed against the product skin material 20 integrated with the surface of the core material 10 to cause rubbing scratches or cutting scratches. It is chosen so that the blade 30 is separated from the core material 10 side to such an extent that it does not.
Considering this, the angle θ is preferably 89 degrees or less, more preferably 85 degrees or less, and further preferably 80 degrees or less.

On the other hand, comparing the portion of the intersection 13 between the product skin material 20 and the flat portion 15 shown in FIGS. 5 and 6, it can be seen that FIG. 5 having a smaller angle θ has a more angular shape.
Such an angular shape is not preferable because it is recognized as a tactile sensation when touched with a finger or the like and causes a sense of incongruity.
Therefore, in the case where there is a possibility that a finger or the like such as a door pocket may touch, the angle θ is preferably 20 degrees or more, more preferably 30 degrees or more, and further 45 degrees or more. More preferably, it is most preferably 60 degrees or more.

By the way, in the vehicle interior material 90, it may be desired to provide the product skin material 20 almost to the lower end of the core material 10.
At this time, as shown in FIG. 7, the flat portion 15 may be formed on the back side of the surface of the core material 10 where the product skin material 20 is present. In this case, the angle θ2 is a negative value.
When the angle θ is negative as shown in FIG. 7, the cutting edge 35 is less likely to be along the flat surface portion 15 than when the angle θ is positive as shown in FIGS. 5 and 6. It is preferable to keep it at −45 degrees or more, that is, not to make a large negative angle exceeding −45 degrees.

Next, a second embodiment of the present invention will be described below with reference to FIG.
Below, a different part from 1st Embodiment is mainly demonstrated, and description may be omitted about the part similar to 1st Embodiment.
In the example shown in FIG. 8A, the flat portion 15 having the same width W of 0.1 mm or more and 3 mm or less as in the first embodiment is provided so as to protrude from the core end portion 14 by the protrusion amount L. .

Then, as shown in FIG. 8A, the blade 30 is inserted in the cutting direction, and the blade 30 is run in the cutting length direction so that the blade edge 35 is along the flat surface portion 15. It can cut | disconnect so that the terminal part 25 as shown to (b) may not remain.
The protruding amount L is preferably 0.1 mm or more so that the flat portion 15 functions as a surface different from the core end 14, and on the other hand, in order not to have a shape that deviates too much from the original basic design. The thickness is preferably 5 mm or less.

In the case of the shape shown in FIG. 8, even if the flat portion 15 is not provided and the core end portion 14 is a mere flat surface, the flat surface can be a surface along which the cutting edge 35 is aligned.
However, in the state where there is no flat portion 15, the area where the core member 10 and the blade 30 are in contact with each other is not stable.
That is, if the blade 30 is inserted deeply in the cutting direction, the blade edge 35 is increased on the core material 10 side, and the contact area between the core material 10 and the blade edge 35 is increased. On the other hand, when the blade 30 is inserted shallowly in the cutting direction. On the contrary, the contact area decreases.

This change in the contact area is a change in sliding resistance when the blade 30 is run in the cutting length direction.
From this, when the blade 30 is inserted too deeply in the cutting direction and the sliding resistance increases and it is difficult to work, the blade 30 is moved to the side where the blade 30 is pulled out while running, and the blade 30 is moved in the cutting direction. When trying to make the insertion amount shallow, it may move too much in the pulling direction, the blade 30 may come off and the product skin material 20 may be scratched.
Further, if the sliding resistance changes, it may cause the blade 30 to be shaken, and if the blade 30 is shaken in the direction away from the core end portion 14 (the lower side in the drawing), the terminal portion 25 may be left uncut. Become.

On the other hand, according to the second embodiment, the blade tip 35 can contact only the range of the width W of the flat surface portion 15 regardless of whether the blade 30 is inserted deeply or shallowly in the cutting direction.
As a result, even if the insertion depth of the blade 30 in the cutting direction changes, the area of contact with the blade edge 35 is almost constant, so that there is almost no change in sliding resistance.
Further, since the width W of the flat portion 15 itself is not so wide, the sliding resistance can be kept small.

For this reason, even if the blade 30 is inserted in the cutting direction by a sufficient depth so that the blade 30 does not come off when the blade 30 runs in the cutting length direction, the operation of running the blade 30 in the cutting length direction Is not difficult to do with sliding resistance.
Therefore, it is possible to prevent the blade from being detached during the operation, and it is possible to run the blade 30 in the cutting length direction while keeping the blade edge 35 along the flat surface portion 15 stably as expected. The trimming can be performed so that the terminal portion 25 is not left uncut.

Finally, a third embodiment of the present invention will be described below with reference to FIG.
Below, a different part from 1st Embodiment is mainly demonstrated, and description may be omitted about the part similar to 1st Embodiment.
In the example shown in FIG. 9A, the flat portion 15 having the width W and the angle θ is formed as in the first embodiment.
When it is desired to make the cut portion of the product skin material 20 difficult to see, it may be finished as shown in FIG.

In the third embodiment, as shown in FIG. 9A, the skin material 27 is provided on the flat surface portion 15, and cutting is performed at the tip 29 of the skin material 27.
In this case, the blade 30 is not directly brought into contact with the flat surface portion 15 of the core member 10 along the cutting direction, but the blade 27 is applied to the skin material 27 having the same surface shape according to the surface shape of the flat surface portion 15. If it runs in the cutting length direction so as to follow 30, it can be cut so that the terminal portion 25 does not remain as shown in FIG.
As shown in FIG. 9 (b), the skin material 27 is in a place where it is difficult to be visually recognized, so by running along the blade 30 along the cutting length direction so as to contact the skin material 27. Even if a slight scratch is generated, there is no problem in terms of appearance.

In the above, the door trim has been described in detail as an example, but the vehicle interior material of the present invention is not limited to the door trim, and a vehicle in which a skin material is provided on a core material such as a luggage trim or a rear side trim. Any vehicle interior material may be used, and such vehicle interior material is also included in the vehicle interior material of the present invention.
In the above description, the case where the trimming is performed after taking out from the injection mold has been described as an example. However, depending on the shape of the injection mold and the like, the trimming operation may be performed while being stored in the injection mold without being taken out. .

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Core material 15 Flat surface part 20 Skin material 25 End part 30 Blade 35 Cutting edge 90 Interior material for vehicles

Claims (3)

Vehicle interior material,
A core material having a flat portion formed by injection molding ;
A skin material provided on the front side of the core material,
The flat portion is formed on an edge that is an outer periphery or an inner periphery of the core material,
Said skin material, along with provided along the shape of the edge of the core material, the end faces of the cut treated end portion side of the skin material is cut processed along the planar portion Characteristic interior material for vehicles. It said edge portion, a vehicle interior material according to claim 1, characterized in that it comprises a rounded portion continuous smoothly with the flat portion. 3. The vehicle interior material according to claim 1 , wherein the flat portion has a width of 0.1 mm or more and 3 mm or less in a cross-sectional view in a die cutting direction.

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