JP2002172648A - Skinned resin molded article and method for molding the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the appearance of a skinned resin molded article when used from deteriorating. SOLUTION: A sealing flange 15 is formed to the end part of a skin 13 over the entire periphery thereof. The skin is set to a fixed mold 21 and, after slide molds 22 and 23 and a core mold 24 are further set, a molten resin is injected from a gate 28. The injected molten resin is charged in a gap part 25 from the gate 28 toward the end part of the skin 13 to finally reach the sealing flange 15 of the skin 13 while bringing the surface part of the skin 13 into close contact with the molten resin by the molding surfaces 21a, 22a and 23a under the filling pressure of the resin. At this time, the molten resin is prevented from leaking to the surface part looked from the outside of the skin 13 by the sealing flange 15 provided over the entire periphery of the end part of the skin 13. Therefore, an outer lid 11 pleasing to a user can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded article with a skin used for interior parts of automobiles and the like and a method of molding the same.

[0002]

2. Description of the Related Art In general, resin molded articles such as glove boxes, console boxes, instrument panels and the like as interior parts of an automobile are composed of a skin on the front side and a resin base material on the back side. The skin is for improving the appearance of the parts, the feeling of the user during handling, and the like. In these resin molded products, a soft skin and a hard resin base are integrally formed.

FIG. 5 shows a glove lid 50 serving as a lid of a glove box. Glove lid 5
0 is the back side (resin base material 54 side) of the outer lid 51 which is a resin molded product in which the skin 53 and the resin base material 54 are integrated.
, An inner lid 52 is attached thereto. Note that the outer lid 51 is a component facing the interior side of the glove lid 50, and its skin 53 is in view of the driver or another occupant, whereas the inner lid 52 is a component facing the interior of the glove box in the glove lid 50. The glove lid 50 is normally invisible to a driver or the like except when the glove lid 50 is opened.

As a method of molding such a resin molded product such as the outer lid 51, for example, a method by injection molding as shown in FIG. 6 is known. This method first,
A skin 53 previously formed by slash molding or the like is set on a mold surface 61 a of a fixed mold 61 of the injection molding device 60. Next, two slide dies 62 that slide left and right,
63 is fixed at a predetermined position (the position shown in FIG. 6), and the vertically movable core mold 64 is lowered, so that
2, 63 and the core mold 64 are completely contacted. At this time, a gap 65 for injecting the molten resin is formed between the back surface of the skin 53 and the core mold 64 and the slide mold 62.

[0005] When the fixing of each mold is completed, a molten resin such as polypropylene or ABS resin is poured into the injection port 66.
The molten resin is injected into the gap 65 through the runner 67 and the gate 68. When the gap 65 is completely filled with the molten resin, the filled molten resin is solidified. After the resin is solidified, the core mold 64 and the two slide molds 62 and 63 are moved to take out the outer lid 51 in which the skin 53 and the solidified molten resin (resin base material 54) are integrated.

The above-described injection molding method requires a smaller number of working steps than the method of separately molding the skin 53 and the resin base material 54 and then bonding them together with an adhesive or the like. Has good adhesion and low reject rate.
Widely used.

[0007]

However, the above-described method by injection molding has a problem that stable product quality cannot always be obtained. That is, as shown in the enlarged portion of FIG.
In some cases, the molten resin leaks to the front side of the skin 53, and the intended quality of the surface of the skin cannot be obtained in that portion. This will be described in detail below.

When the end of the skin 53 formed by slash molding or the like is set on the fixed die 61 as shown in the enlarged portion of FIG. The mold 62 may not be in close contact with the mold surface 62a. If the gap 65 is filled with the molten resin in such a state, the molten resin leaks into the gap 65 a between the skin 53 and the slide mold 62.

As described above, when the resin flows into the gap 65a and solidifies (leakage resin), as shown in FIG. 7, even when the inner lid 52 is finally covered on the outer lid 51, the glove lid 50 is formed. The leaked resin 71 cannot be completely hidden by the inner lid 52. As a result, when the driver or the like opens the glove lid 50 of the glove box, the leaked resin 71 is seen, giving a visual discomfort to the driver or the like. In addition, such a defective product has no value as a product and causes a large economical loss.

The present invention has been made in view of the above problems, and has as its object to prevent the appearance of a resin molded product with a skin from being deteriorated when used.

[0011]

Means for Solving the Problems and Effects of the Invention In order to solve the above-mentioned problems, the resin molded article with a skin according to the first aspect of the present invention has a structure in which the skin and the resin base material in which the molten resin is solidified are integrated. A resin molded article with a skin, wherein a flange portion is formed at an end of the skin to prevent the molten resin from leaking to a surface portion of the skin that is exposed to human eyes. .

The above-mentioned resin molded article with a skin is obtained by integrating a resin base material obtained by solidifying a molten resin and the skin by, for example, injection molding. The skin is formed into a desired shape by, for example, slash molding or vacuum molding, and a flange is formed at an end of the skin. When such a resin molded product with a skin is molded by injection molding or the like, the molten resin injected to the back surface of the skin is filled from the injected portion toward the end of the skin. At this time, since a flange portion is provided at an end portion of the skin, the flange portion prevents the molten resin from leaking from the end portion of the skin to the surface during filling.

The portion where the flange portion is provided, the shape of the flange portion, and the like are formed, for example, so that the flange portion and other parts do not unnecessarily interfere with the skin end portion where the molten resin is likely to leak. It may be appropriately determined according to the shape of the resin molded article with the skin, the state of attachment thereof, the state of injection of the molten resin during molding, and the like.

According to the above-mentioned resin molded product with a skin, the flange is provided at the end of the skin to prevent the molten resin from leaking to the surface portion. Goods can be provided. Further, the resin molded article with a skin according to claim 2 is the resin molded article with a skin according to claim 1, wherein the flange portion is formed over the entire periphery of an end of the skin. Features.

According to the above resin molded article with a skin, the flange is provided over the entire periphery of the skin end, so that compared to a case where the flange is provided only at a part of the skin end, There is almost no possibility that the molten resin leaks out to the surface of the resin molded article, and it is possible to more reliably provide a good-looking resin molded article with a skin.

According to a third aspect of the present invention, there is provided a method for molding a resin molded article having a skin, wherein the skin is formed into a predetermined shape in advance and has a flange portion at an end portion for preventing molten resin from leaking to a surface portion exposed to human eyes. By setting the mold on the mold surface and injecting the molten resin on the back surface of the skin to solidify the molten resin, the skin and the resin base on which the molten resin is solidified can be integrated. Features.

In the above molding method, first, a skin is set along the mold surface inside the molding die. The skin is formed in advance according to the shape of the mold surface of the mold, and a flange portion is formed at an end portion thereof to prevent the molten resin from leaking to a surface portion of the skin that is exposed to human eyes. Have been. This skin can be formed by, for example, slush molding or vacuum molding.

When the skin is set on the mold surface of the mold, a predetermined gap is formed between the back side of the skin and the mold surface of the mold. Further, the molding die is provided with an injection part for filling a molten resin into the void portion, and after setting the skin on the molding die, the molten resin is injected from the injection part.
The molten resin injected on the back surface of the skin is filled from the injected portion toward the edge of the skin, and reaches the edge of the skin while the skin is more closely adhered to the mold surface by the filling pressure.

Generally, when the skin is set in a mold,
When the edge of the skin has poor adhesion between the skin and the mold surface, such as warping or wrinkling due to manufacturing errors during molding of the skin or the weight of the skin edge, etc. There are many. For this reason, when the molten resin is injected and filled into the gap, the molten resin may leak into the gap generated between the skin and the mold surface at the end of the skin, and the molten resin may remain as it is. When solidified, the appearance as a resin molded product may be impaired. However, since the skin of the present invention has a flange at the end, the flange prevents the molten resin from leaking from the end of the skin when the molten resin is filled.

When the molten resin is filled in the cavity of the molding die, the filled molten resin is solidified.
After the solidification, the mold is opened, and a resin molded product in which the resin base material in which the molten resin is solidified and the skin are integrated may be taken out.
In addition, the flange portion is formed, for example, at the skin end portion where the molten resin is likely to leak out so that the flange portion and other parts do not unnecessarily interfere with each other. It may be appropriately determined according to the mounting situation, the injection state of the molten resin at the time of molding, and the like.

According to the above-described molding method, a flange portion is formed at the end of the skin, and this flange portion allows
Since the molten resin is prevented from leaking to the surface of the skin, a good-looking resin molded product can be obtained without impairing the appearance. The method for molding a resin molded article with a skin according to claim 4 is the method for molding a resin molded article with a skin according to claim 3, wherein the flange portion is provided on the entire periphery of an end of the skin. It is characterized by being formed across.

In the above molding method, since the flange portion is provided over the entire periphery of the skin end portion, compared with the case where the flange portion is provided only at a part of the skin end portion, the molten resin is provided on the surface portion of the skin. There is almost no possibility that the resin will leak out, and a good-looking resin molded product with a skin can be obtained more reliably.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are explanatory views showing a glove lid, wherein FIG. 1A is a perspective view, FIG. 1B is a cross-sectional view along AA, and FIG. 1C is a cross-sectional view along BB.

The glove lid 10 serves as a cover of a glove box provided on the passenger side of an instrument panel in a normal vehicle compartment for vehicle inspection and for storing small articles.
1 and the inner lid 12. Then, when actually installed in the car interior, the outer lid 11 faces the interior side and the inner lid 12 faces the inside of the glove box.

The outer lid 11 is formed by integrating a skin 13 and a resin base material 14 by injection molding described later. The skin 13 is formed by slash molding a soft resin material such as vinyl chloride or soft ABS or polyethylene, and the resin base material 14 is made of polypropylene (P).
P) or a hard resin material such as polycarbonate (PC) or ABS. In addition, the skin 13 is for improving the appearance and improving the feel of the driver or the like at the time of handling. Further, the inner lid 12 is formed of a hard resin material, like the resin base material 14 of the outer lid 11, but cannot be seen by a normal driver or the like except when the driver or the like opens the glove lid 10. No epidermis is formed.

The outer lid 11 and the inner lid 12 are fixed by screws (not shown). When the glove lid 10 is actually used as a glove box lid, the glove lid 10 and the glove box are connected by a hinge (not shown) provided on the inner lid 12. At the end of the skin 13, FIG.
As shown in (b) and (c), the sealing flange 15 is formed over the entire circumference. However, since the sealing flange 15 is covered by the inner lid 12, it is visible to a driver or the like. There is no.

Next, an injection molding apparatus for molding the outer lid 11 composed of the skin 13 and the resin base material 14 will be described with reference to FIG. FIG. 2 is a schematic explanatory view showing an injection molding apparatus for molding the outer lid 11. The injection molding apparatus 20 mainly includes a fixed mold 21 and a first slide mold 2.
2, a second slide mold 23 and a core mold 24.

The fixed mold 21 is usually fixed and used, and the upper surface 21b is provided on the upper surface 21b with the skin 1 previously formed into a desired shape.
In order to set 3, a mold surface 21 a processed according to the shape of the skin surface is formed. Both the first slide mold 22 and the second slide mold 23 move in the horizontal direction along the upper surface 21b of the fixed mold 21, and the core mold 24 moves in the vertical direction with respect to the upper surface 21b of the fixed mold 21. Things that move.

When the first slide mold 22, the second slide mold 23, and the core mold 24 are moved to a predetermined position with respect to the fixed mold 21 and fixed (the state shown in FIG. 2), A gap 25 is formed between the back surface, each of the slide dies 22, 23, and the core die 24 for filling a molten resin during a molding process described later. Therefore, the mold surface of each of the slide dies 22, 23 and the core mold 24, that is, the cavity 2
5, the mold surfaces 22a, 23a, and 24a are also fixed molds 2.
1, the desired resin molded product (that is, the outer lid 1) manufactured by the injection molding apparatus 20.
The shape matches the shape of 1).

The core mold 24 is provided with a molten resin in the gap 2.
5 has an inlet 26, a runner 27, and a gate 28 for injecting the molten resin into the gap 25 through the runner 27 and the gate 28. The part 25 is filled.

Next, a method of molding the outer lid 11 by the injection molding device 20 will be described. First, the skin 13 previously formed into a desired shape is set on the mold surface 21 a of the fixed mold 21. The skin 13 is formed by slash molding. That is, along the mold surface of the heated slush molding die, a resin powder in which a soft resin material such as vinyl chloride or soft ABS or polyethylene as a material of the skin 13 was powdered was supplied and heated. After the resin powder is melted on the mold surface, it is cooled and hardened to obtain a skin 13 which has become a resin molded body. In addition, a sealing flange 15 is formed at the end of the skin 13 over the entire circumference. The sealing flange 15 is for preventing the molten resin from leaking to the surface portion of the skin 13 that is exposed to the eye when the molten resin is injected and filled, which will be described later.

When the skin 13 obtained by the slush molding is set on the fixed mold 21, almost the entire surface of the surface of the skin 13 except for the end portion is in close contact with the mold surface 21 a of the fixed mold 21. After setting the skin 13 on the fixed mold 21,
The first slide mold 22 and the second slide mold 23 are moved to predetermined positions and fixed. At this time, the end portion of the skin 13 including the sealing flange 15 is in close contact with the mold surface 22a of the first slide mold 22 and the mold surface 23a of the second slide mold 23, whereby the surface of the skin 13 is All of them are in close contact with the mold surfaces 21a, 22a and 23a.

When the skin 13 is set due to a molding error or the like during the slush molding of the skin 13,
Of the mold surface 21a, 22a, 23
Although there is a case where it does not adhere to a, there is no problem even in such a case, when the molten resin described later is filled, it is brought into close contact with each of the mold surfaces 21a, 22a and 23a by the filling pressure.

First slide mold 22 and second slide mold 2
When the fixing of the mold 3 is completed, the core mold 24 is moved to a predetermined position and fixed, whereby the fixing of all the molds of the injection molding apparatus 20 is completed. At this time, the back of the skin 13
A cavity 25 is formed between the mold surface 22a, the mold surface 23a, and the mold surface 24a.

Next, an injection port 26 provided in the core mold 24 is provided.
Then, a molten resin obtained by heating and melting a resin such as PP, PC, or ABS by a hydraulic pressure of a hydraulic injection device (not shown) is press-fitted, and the molten resin is injected into the cavity 25 through the runner 27 and the gate 28.

The molten resin injected from the gate 28 is filled into the gap 25 from the gate 28 toward the end of the skin 13, and the filling pressure causes the surface of the skin 13 to be formed by the mold surfaces 21a, 22a and 23a. While being in close contact, it finally reaches the sealing flange 15 of the skin 13. At this time, the molten resin is applied to the skin 1 by the sealing flange 15.
3 is prevented from leaking to the surface.

Further, the fixed mold 21 and each slide mold 22,
When the skin 13 is set on the sealing member 23, the sealing flange 15 is
Even if there is no close contact with the molds 2a and 23a, the surface of the skin 13 is brought into close contact with the mold surfaces 22a and 23a by the filling pressure of the molten resin as described above. There is no danger. The injected molten resin is completely filled in the gap 25 in a short time of about 5 to 10 seconds.

After the filling of the molten resin is completed, the molten resin is solidified. Thereafter, the core mold 24, the first slide mold 22 and the second slide mold 23 are moved again, and the resin molded product in which the skin 13 and the resin base material 14 in which the molten resin is solidified is taken out from the fixed mold 21. With this, all the steps of molding are completed.

The glove lid 10 is constituted by combining the resin molded article molded by the injection molding apparatus 20 as described above, that is, the outer lid 11, with the inner lid 12 similarly molded separately by injection molding. When the outer lid 11 and the inner lid 12 are combined, as shown in FIG. 3, the end of the outer lid 11 and the end of the skin 13 including the sealing flange 15 are covered by the inner lid 12, so that the driver or the like can use the resin base. Material 14 is not visible. In FIG. 3, a range indicated by a two-dot chain line is a surface portion that can be seen by a driver or the like when the glove lid 10 is used. Even if the molten resin leaks from the end of the sealing flange 15 to the surface of the skin 13 during the injection molding, the leakage of the molten resin is caused by the filling pressure at the time of filling the molten resin as described above. There is no danger of reaching the surface of the skin that is visible to the public, and the sealing flange 15 is covered with the inner lid 12, so that the appearance of the glove lid 10 does not deteriorate.

Therefore, according to the outer lid 11 molded by the injection molding apparatus 20, the sealing flange 15 is provided at the end of the skin 13, so that the molten resin
The outer lid 11 can be provided with a good appearance for the user because it is prevented from leaking to the surface portion that is exposed to the human eye.

In addition, the sealing flange 15 is
Is provided over the entire circumference of the end portion of the cover 13, compared with the case where the sealing flange 15 is provided only at a part of the end portion of the cover 13, there is almost no possibility that the molten resin leaks to the surface portion of the cover 13. Without, the outer lid 1 which looks more surely
1 can be provided.

According to the molding method using the injection molding apparatus 20, the sealing flange 15 formed at the end of the skin 13 prevents the molten resin from leaking to the surface of the skin. The first slide mold 22 and the second slide mold 23 having mold surfaces 22a and 23a conforming to the shape of the end of the skin 13 including the flange 15 are fixed at predetermined positions and then covered with the core mold 24. For this reason, the molds are closed (that is, each of the slide dies 22, 23 and 23) is closed as compared with a case where an injection molding device that covers the fixed mold 21 with a mold in which the slide dies 22, 23 and the core mold 24 are integrated is used. When the core mold 24 is fixed at a predetermined position), there is no possibility that the sealing flange 15 is crushed by the mold surface, and the desired outer lid 11 having a good appearance can be obtained more reliably. It can be.

In the above embodiment, the sealing flange 15 corresponds to the flange portion of the present invention,
First slide mold 22, second slide mold 23, core mold 24
Corresponds to the mold of the present invention. It should be noted that the embodiments of the present invention are not limited to the above-mentioned embodiments at all, and it goes without saying that various embodiments can be adopted as long as they belong to the technical scope of the present invention.

For example, the skin 13 is formed by slush molding in the above embodiment, but is not limited to slush molding, and may be any method, such as vacuum forming, as long as the skin 13 can be formed into a desired shape. Further, the molding method by the injection molding of the above embodiment is not limited to the outer lid 11 of the above embodiment, such as a floor console lid or an instrument panel provided in an automobile interior, and may be a method of molding any other resin molded product. Can be applied. Also in this case, by providing the sealing flange portion at the end of the skin, it is possible to prevent the molten resin from leaking to the surface portion of the skin, and it is possible to provide a good-looking resin molded product. .

Furthermore, in the above embodiment, the sealing flange 15 is configured to bend toward the front side of the skin 13 at the end of the skin 13, but is not limited to this, and is shown, for example, in FIG. As described above, the sealing flange 44 may be configured to bend toward the back side at the end of the skin 42, and the bending direction and the bending angle,
Further, the length of the bent portion and the like may be appropriately set in consideration of the shape of the end portion of the skin to be molded, the sealing property when the molten resin is injected, and the like. In the injection molding apparatus 41 shown in FIG. 4A, the leakage of the molten resin to the surface of the
4, the same operation and effect as in the above embodiment can be obtained.

In this case (FIG. 4A), a flat portion may be provided at the boundary between the end of the skin 42 and the sealing flange 44. Specifically, for example, as shown in FIG. 4B, the flat portion 47a is provided at the end of the skin 47, that is, at the boundary with the sealing flange 49. In this way, after completion of the molded product by the injection molding device 46,
When the rear surface of the molded product is covered with another molded product (corresponding to the inner lid 12 in FIG. 1 or FIG. 3), the alignment with the other molded product is improved (that is, as in FIG. Are abutted against the flat portion 47a and are fixed to each other reliably.)

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views showing a glove lid of the present embodiment, wherein FIG. 1A is a perspective view, FIG.
Is a BB cross-sectional view.

FIG. 2 is a cross-sectional view showing an injection molding apparatus for molding the outer lid of the embodiment.

FIG. 3 is a cross-sectional view illustrating an end of the glove lid of the present embodiment.

FIG. 4 is a cross-sectional view showing an injection molding apparatus for molding another resin molded product.

FIG. 5 is a perspective view showing a conventional glove lid.

FIG. 6 is a sectional view showing a conventional injection molding apparatus.

FIG. 7 is a sectional view showing an end of a conventional glove lid.

[Explanation of symbols]

10 ... glove lid, 11 ... outer lid,
12 ... inner lid 13, 42, 47 ... epidermis,
14 ... resin base material 15, 44, 49 ... sealing flange 20, 41, 46 ... injection molding device 21, 41c, 46c ... fixed mold 21a, 22a, 23a, 24a ... mold Surface 22: first slide type 23: second slide type 24, 41a, 46a: core type 25, 43, 48: gap 26: injection port, 27: runner 28 ... Gates 41b, 46b ... Slide type 47a ... Flat surface

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D022 CA08 CD11 CD29 CD30 3D023 BA01 BB01 BC01 BD29 BE06 BE31 4F206 AA11 AD05 AD25 AG03 AH26 JA07 JB13 JF05 JQ81

Claims (4)

[Claims] 1. A resin molded product with a skin in which a skin and a resin base material in which a molten resin is solidified are integrated, wherein an end portion of the skin is melted on a surface portion of the skin that is exposed to human eyes. A resin molded product with a skin, wherein a flange portion for preventing leakage of the resin is formed. 2. The resin molded article with a skin according to claim 1, wherein said flange portion is formed over the entire periphery of an end of said skin. 3. A skin which is formed in a predetermined shape in advance and has a flange portion at an end portion for preventing molten resin from leaking to a surface portion which is exposed to the human eye is set on a mold surface of a molding die, and A method for molding a resin molded article with a skin, comprising injecting a molten resin onto a back surface and solidifying the molten resin to integrate the skin with the resin base material having the molten resin solidified. 4. The method of molding a resin molded article with a skin according to claim 3, wherein the flange portion is formed over the entire periphery of the end of the skin.