JP2003340863A - Laminated molded object and mold for molding the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated molded object comprising a resin core material and a skin and a mold for molding the same and to develope resin appearance to a part of skin appearance simultaneously with molding not only to enhance the appearance of the laminated molded object but also to reduce a production cost. <P>SOLUTION: A skin 30 is set in molds 50 and 60 to supply a molten resin M from the back surface side of the skin 30, and a resin core material 20 and a skin 30 are molded along the cavity shapes of the molds 50 and 60 at the same time to mold a laminated molded object 10. At this time, a speaker grill 11 is molded at the same time by punching pieces 52 and 63 and a highly developed shaped groove part 53 is formed along the peripheral edge part of the punching piece 52 arranged to the mold 50 on one side and the width of the groove part 53 is set to 3 mm or less while the angle of a rising wall part is set to 60° or more. Then, the molten resin M pierces the skin 30 to be forcibly introduced into the groove part 53 to well spread on the surface side of a product. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated molded body suitable for automobile interior parts, home electric appliances and the like and a molding die for the laminated molded body, and more particularly, to a resin core material and a skin by mold press molding or injection molding. The present invention relates to a laminated molded article in which the resin appearance is made to appear in a part of the outer appearance of the skin by partially exposing the resin to the product surface at the time of simultaneous molding, and a molding die thereof.

[0002]

2. Description of the Related Art For example, for automobile interior parts, enclosures for home electric appliances, etc., there are often used laminated moldings in which a skin is laminated on the surface of a resin core material molded into a required shape.

FIG. 5 is a plan view showing an automobile rear parcel shelf 1 having a shelf function, which is installed on the rear side of a rear seat as an automobile interior part. The left and right sides of the rear parcel shelf 1 are mounted on a vehicle. A speaker grill 2 is provided on the front side of the audio speaker.

When the rear parcel shelf 1 is composed of a synthetic resin molded body alone, mold press molding,
Alternatively, by injection molding, the rear parcel shelf 1 is formed into a desired shape, and at the same time, a large number of punching holes are formed at the same time through the punching block arranged in the forming die to form the speaker grill 2. Is.

In addition, as shown in FIG. 6, when the rear parcel shelf 1 is formed of a laminated molded body in which a surface 4 of a resin core material 3 is attached to the surface of the resin core material 3 having a feeling of touch and a decorative function, a speaker is used. An opening 5 for grilling is formed in the outer skin 4 so as to correspond to a grill, and a speaker grill 2 having a large number of punched holes in the resin core material 3 is formed, but the edge of the opening 5 for grilling in the outer skin 4 is cut. As a wood grain, it stands out outside, and a good product appearance cannot be obtained.

As a countermeasure, it is necessary to attach a decorative molding 6 along the peripheral portion of the speaker grill 2 or to attach a speaker grill formed as a separate body in a separate process (not shown). was there.

[0007]

As described above, the speaker grill 2 is attached to the rear parcel shelf 1 of the conventional skin 4 specification.
In the case of integrally providing the above, a decoration molding 6 for hiding the edge of the grille opening 5 of the outer skin 4 is additionally provided, or the speaker grill 2 is formed separately from the rear parcel shelf 1. The speaker grill 2 is fitted and fixed in the mounting hole of the rear parcel shelf 1. Therefore, it has been pointed out that the number of man-hours for mounting is large, the number of fittings is large, the manufacturing cost is high, and the number of man-hours is wide.

The present invention has been made in view of the above circumstances, and is applied to the surface of a resin core material used for automobile interior parts such as rear parcel shelves and door trim lowers in upper and lower two-part type door trims and home electric appliances. (EN) A laminate molded body in which a skin is laminated, and by partially exposing the resin on the product surface, it is possible to provide a laminate molded body in which the resin appearance is exposed in a part of the skin appearance and a molding die therefor. Has an aim.

[0009]

In order to achieve the above object, the invention according to claim 1 of the present application is such that a skin is put into a molding die in a mold open state, and a back surface of the skin is placed. The molten resin, which is the material of the resin core material, is supplied to the side, and the resin core material is formed into a required shape along the cavity shape defined by the molding die, and is laminated on the surface of the resin core material. A laminated molded body including an integrated skin, wherein a groove of a highly expanded shape is provided in a molding die on one side, the groove width of the groove is 3 mm or less, and the rising wall has an angle of 60 mm. By setting the edge shape to be equal to or more than °, the molten resin enters the groove portion, the rib of the groove portion shape is formed on the product surface as a ridge, and the molten resin is passed through the groove portion to the product surface side. It is characterized by having been made to pass.

Here, the laminated molded body is a vehicle interior such as a rear parcel shelf provided on the rear side of a rear seat and having a shelf function, or a door trim lower in a two-part upper and lower type automobile door trim installed in a door panel. There are parts or enclosures for home appliances.

Further, as the resin core material, a general-purpose thermoplastic resin such as polypropylene (hereinafter referred to as PP) resin, ABS resin, or the like, or a thermoplastic resin mixed with an appropriate filler can be used. For example, a PP resin mixed with talc is preferable in consideration of cost, mechanical characteristics, and moldability. As the surface skin, a backing layer having a low basis weight is integrated on the back surface of the non-woven carpet, or a heat-fusible fiber is mixed in the non-woven carpet.

According to the invention described in claim 1 of this application, after the skin is set in the molding die, the molten resin is supplied to the back surface side of the skin and the cavity shape of the molding die is formed. When the resin core material and the skin are simultaneously molded along the groove, a highly developed groove portion is formed in the molding die on one side, and in particular, the groove width of the groove portion is 3 mm or less and the rising wall portion has an angle of 60 mm. Since it is set to an edge shape of more than °, the molten resin easily breaks through the skin without impairing the fluidity of the molten resin and penetrates into the groove, then the molten resin exudes to the product surface side, Molten resin spreads to the surface side. As a result, the resin appearance can be exposed on a part of the product surface having the skin appearance.

Next, the invention according to claim 2 of this application is a molding die for molding a laminated molded body in which a surface of a resin core material is laminated, and the molding die is a mold. Molding mold on one side provided with a groove of a highly developed shape that forcibly exudes the molten resin supplied to the back side of the skin to be poured into the inside of the skin, and the other to set the skin The groove portion has a groove width of 3 mm or less, and the rising wall portion has an angle of 60 ° or more.

According to the invention described in claim 2,
Since a groove portion having a highly developed shape is formed in the molding die on one side with a predetermined groove width, the molding die can be easily processed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a laminated molded body and a molding die used for molding the laminated molded body according to the present invention will be described below by exemplifying a rear parcel shelf for an automobile.

FIG. 1 is a plan view of a rear parcel shelf for an automobile, FIG. 2 is a partial sectional view showing a structure of the rear parcel shelf for the automobile, and FIG. 3 is an entire molding die for molding the rear parcel shelf for the automobile. FIG. 4 and FIG. 4 are explanatory views showing a main part of the molding die.

First, referring to FIGS. 1 and 2, a rear parcel shelf 10 for an automobile is provided on the rear side of a rear seat and has a shelf function for covering an upper opening of a luggage room and mounting equipment on the upper opening. On the left and right sides of the rear parcel shelf 10 for an automobile, there are provided speaker grills 11 located on the surface side of the vehicle-mounted audio speaker.

More specifically, as shown in FIG. 2, a rear parcel shelf 10 for an automobile is a laminated molding in which a surface of a resin core material 20 having an appropriate shape-retaining property is attached with a skin 30 excellent in feel and appearance. In particular, in the present embodiment, when the resin core material 20 and the outer skin 30 are simultaneously molded, the speaker grill 11 is configured by setting the dummy portion A having a predetermined thickness dimension in the peripheral portion of the speaker grill 11. Can be satisfactorily integrally molded.

The resin core material 20 is made of talc 10 to 15
PP resin mixed in parts by weight, MFR (melt flow index value) of 75 or more, IZD (Izod impact strength)
4.5, material with FM (elasticity) of 2000 or more is used.

As the skin 30, a non-woven carpet made of a polyester fiber typified by polyethylene terephthalate (PET) is used, and a heat-fusible fiber for binding each fiber is mixed in the non-woven carpet. ing. The plate thickness d of the dummy portion A needs to be 3 mm or more, and if it is less than 3 mm, the resin flow is poor, which causes a short shot.

As is apparent from FIG. 2, the grille opening 31 is formed in the outer skin 30 in correspondence with the speaker grill 11.
However, the cutting edge of the edge 31a of the grille opening 31 of the outer skin 30 is not conspicuous to the outside, and the resin core material 20 is provided on the surface side of the edge 31a of the speaker grille opening 31 of the outer skin 30. Speaker grill 11 so that
Highly developed ribs 12 are provided along the peripheral edge of the.

The rib 12 plays an important role in spreading the molten resin to the product surface side, and the rib 12 also contributes to the improvement of the appearance performance by the accent effect with the skin 30. There is.

Next, the structure of the molding die used for molding the automobile rear parcel shelf 10 will be described with reference to FIGS. 3 and 4. The molding die 40 can move up and down by a predetermined stroke. Molding upper mold 50 and molding upper mold 5
The lower molding die 60 on the fixed side located below 0, the upper molding die 50 can be moved up and down by a predetermined stroke by the lifting cylinder 51, and in order to form the speaker grill 11, The upper molding die 50 is provided with an upper punching piece 52.

On the other hand, the lower molding die 60 is the lower molding die 60.
A manifold 61 to which a molten resin is supplied from an injection molding machine (not shown) installed adjacent to the is installed, and a gate 62 is formed at three locations branching from the manifold 61. Further, the lower molding die 60 is also provided with a lower punching piece 63 for forming the speaker grill 11.

Then, as shown in FIG.
The epidermis 30 is placed on the mold surface of the.
Corresponding to the speaker grill 11, a grill opening 31 (including the dummy portion A) having a diameter smaller than the diameter of the speaker grill 11 is opened in advance.

Further, the molding die 40 according to the present invention is shown in FIG. 4 so that the edge portion 31a of the grille opening 31 of the outer skin 30 is not conspicuous to the outside and enables integral molding. As described above, the feature is that the highly developed groove portion 53 shown in FIG. 4 is provided along the peripheral edge portion of the punching piece 52 in the upper molding die 50.

Then, the dimensional relationship of the groove portion 53 will be described by exemplifying preferable numerical values. First, the peripheral surface of the punching piece 52 has an inclined surface so as to incline downward toward the terminal, and the inclination angle indicated by a in the figure is:
It is set in the range of 60 to 90 °. By setting the inclination angle indicated by a in the figure within the above-mentioned range, the skin 30 does not rise to the wall portion, so that the vertical wall of the resin and the parting portion of the skin 30 look good.

Next, reference numeral b indicates the width of the groove portion 53, and the numerical value of the reference numeral b is set to 1.5 mm. Also,
The code c is the groove depth of the groove 53, and the numerical value of the code c is 4
When the thickness is set to mm, the molten resin easily breaks through the skin 30. Next, as described above, the reference character d is the clearance between the upper and lower molds corresponding to the dummy part A and is set to 3 mm or more.

The dimensions of the present embodiment can be changed as required, but the tip is generally an acute angle, and the inclination angle a is 60 ° or more:
The b dimension is also relatively small and good results can be obtained when it is about 2 mm or less.

Further, the inner wall surface of the highly developed groove portion 53 is R-processed at two locations of R = 2.5 and R '= 0.5.

Since the dimensional relationship between the punching piece 52 and the groove portion 53 formed in the peripheral portion of the punching piece 52 is set as described above, the molten resin M is passed through the manifold 61 and the gate 62 to the lower mold 60. When it is distributed and supplied onto the mold surface, the molten resin M spreads all over the inside of the cavity. Further, in the peripheral portion of the speaker grill 11, the grille opening edge portion 31a of the skin 30 is arranged above and below the punching pieces 52, 6 along the inner periphery of the groove portion 53.
Since the skin 30 that is sandwiched by 3 and is under tension is positioned in a bridge shape in the opening of the groove portion 53, the molten resin M easily pierces the skin 30 by the resin pressure and enters the groove portion 53. It is introduced compulsorily. After that, since it spreads to the surface side of the skin 30 along the punching piece 52, the edge 31a of the grille opening 31 of the skin 30 is not conspicuous to the outside, and the resin core material 20 and the skin 30 can be simultaneously molded. Become.

Therefore, by simply modifying the shape of the upper molding die 50, the speaker grille 11 can be simultaneously formed simultaneously with the molding of the automobile rear parcel shelf 10 including the resin core material 20 and the outer skin 30, and the manufacturing cost can be reduced. It can be significantly reduced.

In the above-described embodiment, the automobile rear parcel shelf 10 is molded by the mold press molding method. However, the embodiment can be applied to a door trim lower equipped with a speaker grill and the injection molding method can be applied. Molding is also possible.

[0034]

As described above, according to the laminated molded body and the molding die thereof according to the present invention, when the resin core material and the outer skin are simultaneously molded, the highly developed groove portion is formed in the molding die. By forming the groove width of the groove part to 3 mm or less and setting the angle of the rising wall part to 60 ° or more, the molten resin pierces the skin and penetrates into the groove to form a part of the skin appearance. The resin appearance can be revealed. Therefore,
As in the past, it is possible to save a lot of work by attaching a decorative molding that covers the cut mouth of the epidermis or a separate speaker grill to the laminated molded body, which leads to a significant cost reduction.
This has the effect of enhancing the appearance and design of the laminate.

[Brief description of drawings]

FIG. 1 is a plan view showing a rear parcel shelf for an automobile, which is an embodiment of a laminated molded body according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an explanatory diagram showing an overall configuration of a molding die used when molding the rear parcel shelf for an automobile shown in FIG. 1.

FIG. 4 is an explanatory diagram showing a main part of the molding die shown in FIG.

FIG. 5 is a plan view showing a conventional rear parcel shelf for an automobile.

FIG. 6 is an explanatory view showing a state in which a decorative molding is attached to a conventional rear parcel shelf for an automobile.

[Explanation of symbols]

10 Car rear parcel shelf 11 speaker grill 12 ribs 20 Resin core material 30 epidermis 31 Grill opening 31a edge 40 Mold for molding 50 upper mold 51 Lifting cylinder 52 (Upper) punching piece 53 groove 60 Lower mold 61 manifold 62 gates 63 (Lower side) Punching piece A dummy section M molten resin

Continued front page    (72) Inventor Hiroyuki Aizawa             3316 Miyayama, Samukawa-cho, Takaza-gun, Kanagawa Prefecture             Industry Co., Ltd. F-term (reference) 4F202 AD08 AG03 AG28 AH26 AR07                       AR12 CA09 CA11 CB01 CB13                       CK84                 4F206 AD08 AG03 AG28 AH26 AR07                       AR12 JA07 JB13 JN25 JQ81

Claims (2)

[Claims] 1. A molding die (50, 6) in a mold open state.
0), the outer skin (30) is charged, and the molten resin (M) which is the material of the resin core material (20) is supplied to the back surface side of the outer skin (30) to form the molding die (50, 60). ) A laminated molding comprising a resin core material (20) formed in a required shape along a cavity shape defined by), and a skin (30) laminated and integrated on the surface of the resin core material (20). In the body (10), a groove (53) having a highly developed shape is provided in the molding die (50) on one side, the groove width of the groove (53) is 3 mm or less, and the angle of the rising wall is Is set to have an edge shape of 60 ° or more, the molten resin (M) enters the groove portion (53), and the rib (1) having the groove portion (53) shape is formed.
The laminated molded article is characterized in that 2) is formed as a ridge on the product surface, and the molten resin (M) is spread to the product surface side through the groove (53). 2. A skin (30) on the surface of a resin core material (20).
A molding die (40) for molding a laminated molding (10) in which are laminated, and the molding die (40) is supplied to the back surface side of a skin (30) to be put into the mold. A mold (50) on one side provided with a groove (53) having a highly developed shape for forcibly exuding the molten resin (M) to the surface side of the skin (30) and the skin (30). It comprises a molding die (60) on the other side to be set, and the groove (53) has a groove width of 3 mm or less and an angle of the rising wall is set to 60 ° or more. Molds for molding laminated moldings.