JPH10999A - Molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding that is lighter in weight and excellent in appearance, and also attachable with certainty as well as to dispense with any terminal work, besides easily formable. SOLUTION: In a slender molding consisting of a body part 11 and a mounting part 21 constituting the outer surface, this body part 11 is composed of a curved form which bulged an interval between to ends in both cross and longitudinal directions so as to form an air space 12 inside. On the other hand, the mounting part 21 is composed of a piece projected to an inner part of the body part 11, and thus this molding consists of an injection molding product integrally formed with the body part 11 and the mounting part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding for an automobile, and more particularly to a molding made of an injection molded product.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
A molding 72 is mounted on the side of the vehicle body 71 for both decoration and vehicle body protection. The molding 72 is composed of a main body constituting an outer surface and a mounting portion for mounting to a vehicle body, and is preferably formed by cutting an extruded product having a constant cross-sectional shape made of a soft vinyl chloride resin or the like into a predetermined length. Used.

However, the cut end of the extruded product is
The appearance was monotonous, and it was not preferable especially in the case where decorativeness was emphasized like a car. Further, in the case of the side molding to be attached to the door of an automobile, it is necessary to reduce the thickness of the molding terminal so that the molding end does not interfere with the vehicle body when the door is opened and closed.

Therefore, conventionally, a molding material obtained by cutting an extruded product having a constant cross-sectional shape into a predetermined length is arranged in an injection mold, and a terminal cap is integrally formed at an end of the molding material by injection molding. The formed one came to be used.

[0005] Furthermore, the molding is required to be lightweight, and the following structure has been proposed to satisfy the requirement. That is, as shown in FIG. 12 and FIG. 13 showing a cross section taken along line 13-13, the central portion 73 in the width direction swells outward and the bottom portions 74 at both ends in the width direction.
A molding 78 has been proposed in which an extruded product in which is bent inward is cut into a predetermined length to form a molding material 75, and end caps 76 and 77 are formed at the ends thereof by injection molding. In the molding 78 having this structure, the bottom portion 74 forms a mounting surface, and is attached to a vehicle body that is suitable for an adhesive such as a double-sided adhesive tape or an adhesive.

However, in the molding 78 using the extruded product, since the joining lines 79 and 80 with the terminal caps 76 and 77 appear, it is hard to say that the appearance is excellent. Furthermore, at the time of injection molding of the terminal caps 76 and 77, the inside of the molding material 75 must be filled so that the inside of the molding material 75 is not filled with resin.

Further, as shown in FIG. 14, the cross-sectional shape along the width direction is an arch shape, and the thickness of both side portions 81, 81 and the bottom portion 82 in the width direction is increased, so that the length direction of the molding is increased. A molding 84 injection-molded to both ends at one time has also been proposed. The molding 84 made of the injection molded article has an advantage that a joining line with the terminal cap is not generated.

However, in the molding 84 made of the injection-molded product, the thickness of the bottom portion 82 serving as a mounting portion is increased in order to secure a sufficient bonding area with the vehicle body. As a result, there is a problem that the entire thickness becomes non-uniform, the sink is easily generated after injection molding, and the appearance is easily deteriorated. Further, since the central portion 85 is the thinnest, a resin bonding line called a weld line is easily generated in the central portion 85 at the time of injection molding, which causes a problem that the appearance is impaired.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides a molding that is lightweight, has a good appearance, can be securely mounted, and does not require terminal processing, and can be easily formed. To provide.

[0010]

According to a first aspect of the present invention, there is provided an elongated molding comprising an outer surface and a mounting portion, the width direction and the length direction being such that the main portion forms a space inside. The mounting portion is formed of a piece protruding inward along the bottom peripheral edge of the main body portion, and the main body portion and the mounting portion are integrally formed. It is characterized by comprising an injection molded product.

According to a second aspect of the present invention, there is provided an elongated molding comprising a main body and an attaching portion constituting an outer surface, wherein the widthwise and lengthwise ends are formed so that the main body forms a space inside. An inward piece protruding toward the inside of the main body along the bottom edge of one end in the length direction and both ends in the width direction of the main body; The main body and the mounting portion are made of an injection-molded product that is formed as an outwardly projecting piece protruding outward along the length direction from the bottom at the other end in the length direction.

According to the moldings of the first and second aspects of the present invention, the entire molding is made of an injection molded product. Therefore, unlike the case where the end cap is injection-molded at the end of the extruded product, the joining of the terminal cap is performed. There are no lines and the appearance is good. Further, since the mounting portion of the molding is a piece protruding from the bottom of the main body, the width of the piece determines the mounting (adhesion) area, and is not affected by the thickness of the main body and the mounting portion. Therefore, since the thickness of the main body and the mounting portion can be made uniform, sink marks or weld lines caused by the non-uniform thickness can be prevented, whereby the appearance can be improved. Also, since molding can be formed at once by injection molding,
No terminal processing is required and the molding operation is simplified.

According to the molding of the second aspect of the present invention, in addition to the above-described operation, an outwardly projecting piece protruding outward along the lengthwise direction from the bottom of the other longitudinal end of the main body is formed. Therefore, when the molding is released from the injection molding after the injection molding, the molding can be removed from the injection molding die by grasping the outwardly facing piece, and the demolding operation is facilitated. Further, the outward piece serves as a portion for preventing interference with a door when the molding is attached to a vehicle body,
Acts as two birds with one stone.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing one embodiment of the molding according to claim 1 of the present invention, and FIG.
3 is a cross-sectional view of another embodiment, FIG. 5 is a cross-sectional view of another embodiment, and FIG. 6 is a cross-sectional view of another embodiment. FIG. 7 is a perspective view showing one embodiment of the molding according to the second aspect, and FIG.
8 is a sectional view, and FIG. 9 is a sectional view taken along line 9-9 in FIG. FIG. 10 is a sectional view showing an example of injection molding of a molding according to the present invention.

A molding 10 according to the first aspect of the present invention shown in FIGS. 1 to 3 is an elongated product attached to the body of an automobile, and is made of an injection-molded article composed of a main body 11 and an attaching portion 21. It is formed of a soft resin such as a vinyl chloride resin or a thermoplastic elastomer (olefin or styrene).

The main body 11 constitutes the outer surface of the molding 10, and forms a space 12 inside.
The central part 13, that is, both ends 1 in the longitudinal direction as shown in FIG.
4 and 15, and both ends 16 and 17 in the width direction as shown in FIG.
The intervening portion 13 has a curved shape that bulges outward (in a direction opposite to the mounting surface 22 described later). With this curved shape, when the molding 10 comes into contact with or hits another, it exhibits a cushioning property, and the vehicle body can be effectively protected. Further, since the main body 11 has both ends 14 and 15 in the longitudinal direction closed by the curved shape, the terminal of the molding 10 has a good appearance. The thickness of the main body 11 is the same as the thickness of the mounting portion 21.

The mounting portion 21 is a portion for mounting the molding 10 to a vehicle body, and is formed by a piece projecting from the bottom peripheral edge 18 of the main body 11 toward the inside of the main body 11. The bottom surface of the mounting portion 21 forms a mounting surface 22 to the vehicle body, and is provided with an adhesive 23 such as a double-sided adhesive tape or an adhesive. Further, the width of the mounting portion 21 is set to a size that allows a sufficient bonding area to the vehicle body and that does not prevent the mold from being removed from the injection mold by utilizing the flexibility of the molding 10 when the molding 10 is formed. The optimal dimensions are determined by the material, shape, thickness, etc. of the molding 10. An example having a width of about 10 mm is shown.

It is to be noted that the mounting portion 21 may be formed as another example shown in FIGS. First, in the molding 10A shown in FIG. 4, the mounting portion 21A is provided at a position slightly higher than the bottom peripheral edge 18A of the main body portion 11A, and the mounting surface 2A is provided.
A step 25A is formed between 2A and the bottom peripheral edge 18A of the main body 11A. In this case, due to the presence of the step 25A, the adhesive 23A such as a double-sided adhesive tape is attached to the mounting surface 2A.
2A can be accurately and easily provided.

A molding 10B shown in FIG.
Is a cutout 25B formed in the base of the mounting portion 21B. Reference numeral 11B denotes a main body, and 23B denotes an adhesive such as a double-sided adhesive tape. In this case, molding 10
B is removed from the injection mold, the cut 25B
Since the attachment portion 21B is easily bent, the removal from the mold becomes easier. As a result, the width of the mounting portion 21B can be increased without being affected by the releasability, and the bonding area with the vehicle body can be further increased.

On the other hand, a molding 10C shown in FIG.
The ribs 25C are provided upright at predetermined intervals along the length direction inside the mounting portion 21C. Reference numeral 11C denotes a main body, and 23C denotes an adhesive such as a double-sided adhesive tape. In this embodiment, when attaching the molding 10C to the vehicle body by pushing the body 11C, the body 11
Since the pressing force of C is reliably applied to the mounting portion 21C via the rib 25C and the adhesive 23C is strongly pressed against the vehicle body, the molding 10C is strongly fixed to the vehicle body with great adhesiveness.

The molding 30 shown in FIGS.
The present invention relates to an embodiment of the second aspect of the present invention. The molding 30 is an elongated body attached to the body of an automobile, particularly a side surface of a door, and is made of an injection-molded product composed of a main body 31 and an attachment portion 41, and is made of a soft vinyl chloride resin or a thermoplastic elastomer (olefin). (Styrene or styrene).

The main body 31 constitutes the outer surface of the molding 30, and forms a space 32 inside.
Central part 33, that is, both ends 3 in the longitudinal direction as shown in FIG.
4, 35, and both ends 36, 37 in the width direction as shown in FIG.
The intervening portion 33 has a curved shape that bulges outward (in a direction opposite to the mounting surface 42 described later). With this curved shape, the molding 30 exhibits a cushioning property, and the vehicle body can be effectively protected. Also, this main body 31
Since both ends 34 and 35 in the longitudinal direction are closed by the curved shape, the appearance of the terminal of the molding 30 is good. The thickness of the main body 31 is the same as the thickness of the mounting portion 41.

The mounting portion 41 is a portion for mounting the molding 30 to a vehicle body, and is composed of an inward piece 43, and an outward piece 44. The inward piece 43 is attached to the main body 31.
Is projected inside the main body 31 along one end 34 in the length direction and the bottom peripheral edge 38 of both ends 36 and 37 in the width direction. The width of the inward piece 43 is such that the area of adhesion to the vehicle body is sufficient and does not prevent the mold from being removed from the injection mold using the flexibility of the molding 10 at the time of molding the molding 30. The optimum dimensions are determined by the material, shape, thickness, etc. of the molding 30.
An example having a width of about 10 mm is shown.

On the other hand, the outward piece 44 projects outward from the bottom 39 at the other end 35 in the longitudinal direction of the main body 31 along the longitudinal direction thereof, and is continuous with the inward piece 43. Is formed. Since the outwardly facing piece 44 is a thin part of the molding 30 (the height from the vehicle body surface is low), the terminal of the molding 30 is connected to the vehicle body (door) when the door is opened and closed, in addition to the mounting operation on the vehicle body. ) To prevent interference. In addition, as described below,
When the molding 30 is released from the injection mold, it is used to hold the outward piece 44 and remove it from the mold surface. The length of the outwardly facing piece 44 is determined in consideration of the area of adhesion to the vehicle body, the appearance of the molding 30, or the workability of removing the mold. As an example, about 30 mm is shown.

In the molding 30 according to the second aspect, the inwardly facing piece 43 of the mounting portion 41 is
The step 25A and the cut 25 shown in FIGS.
The same thing as B or rib 25C may be provided.

Next, an example of molding the moldings 10 and 30 will be briefly described with reference to FIG. The moldings 10 and 30 are formed by a known injection molding method using an injection mold 60 as shown in FIG. The illustrated injection mold 60 includes a core mold 61, a lower mold 62, and an upper mold 63, and is connected to an injection device (not shown). The core mold 61 includes the moldings 10 and 30.
The upper surface has a mold surface forming an inner surface side of the mold, and has a substantially T-shaped cross section, and is formed between the mold surfaces of the lower mold 62 and the upper mold 63 corresponding to the shape of the moldings 10 and 30. A space 64 is formed. In addition, this core type 61
Of the lower mold 62 can be projected upward by the ejector 65.

First, as shown in FIG. 10-A, the injection mold 60 is closed, a resin is injected from the injection device into the molding space 64, and the resin is formed by the main bodies 11, 31 and the mounting portions 21, 41. The moldings 10, 30 are integrally injection molded.

Thereafter, as shown in FIG. 10-B, the injection mold 60 is opened. At this time, molding 10, 30
Remains on the lower mold 62 together with the core mold 61 in a state of being attached to the mold surface of the core mold 61. Subsequently, as shown in FIG. 10C, the ejector 65 is operated to project the core mold 61 together with the moldings 10 and 30 upward from the mold surface of the lower mold 62.

Then, the edges of the moldings 10, 30 are lifted, and the moldings 10, 30 are removed from the core mold 61. At this time, the moldings 10 and 30 are configured such that the mounting portions 21 and 41 have an undercut shape,
1 is engaged. However, molding 10,30
Is made of a soft resin such as a soft vinyl chloride resin for attachment to a vehicle body and cushioning, and can be deformed to some extent by the flexibility of the resin. Therefore, if the edges of the moldings 10 and 30 are forcibly lifted, the vicinity of the attachment portions 21 and 41 is deformed and detached from the core mold 61, and the moldings 10 and 30 can be forcibly removed and removed. Further, a molding 30 according to the embodiment of claim 2.
In this case, the molding 30 can be detached from the core mold 61 by grasping the outwardly facing piece 44 of the mounting portion 41, so that the molding 30 can be easily removed.

[0030]

As described above, as described above, according to the first and second aspects of the present invention, not only the light weight but also the entire molding is made of an injection molded article integrally formed. There is no terminal cap joining line that impairs the appearance, and the appearance is good. Furthermore, the mounting portion of the molding is a piece protruding from the bottom of the main body, and the mounting (adhesion) area is determined by the width of the piece, and is not affected by the thickness of the main body and the mounting portion. It can be made uniform, and does not cause appearance defects such as sink marks and weld lines. In addition, since molding can be performed at once by injection molding, terminal processing is not required and the molding operation is simple.

Further, according to the second aspect of the present invention, in addition to the above effects, the molding can be removed from the injection molding die by grasping the outward piece of the mounting portion, so that the demolding operation can be performed easily. This has the effect of facilitating molding of the molding. In addition, since the outwardly facing piece of the mounting portion serves as a portion for preventing the door from interfering when the molding is mounted on the vehicle body, it is not necessary to devise a terminal shape for preventing the interference.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a molding according to claim 1 of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a cross-sectional view of another embodiment.

FIG. 5 is a cross-sectional view of another embodiment.

FIG. 6 is a sectional view of still another embodiment.

FIG. 7 is a perspective view showing one embodiment of a molding according to claim 2;

8 is a sectional view taken along line 8-8 in FIG. 7;

9 is a sectional view taken along line 9-9 in FIG. 7;

FIG. 10 is a sectional view showing an example of injection molding of a molding of the present invention.

FIG. 11 is a schematic perspective view of an automobile to which a molding is attached.

FIG. 12 is a perspective view showing an example of a conventional molding.

FIG. 13 is a sectional view taken along line 13-13 of FIG.

FIG. 14 is a cross-sectional view of a molding made of a conventional injection molded product.

[Explanation of symbols]

 10, 30: Molding 11, 31: Main body 21, 41: Mounting part 43: Inward piece 44: Outward piece

Claims (2)

[Claims] 1. An elongated molding comprising a main body portion and an attachment portion constituting an outer surface, wherein the main body portion has a curved shape in which a space between both ends in a width direction and a length direction is outwardly expanded so as to form a space inside. Become
On the other hand, the molding is characterized in that the mounting portion is formed of an injection-molded product in which the main body portion and the mounting portion are formed integrally with each other and formed as a piece protruding inwardly of the main body portion along the bottom peripheral edge of the main body portion. . 2. An elongated molding comprising a main body portion and an attachment portion constituting an outer surface, wherein the main body portion has a curved shape in which a space between both ends in a width direction and a length direction is outwardly expanded so as to form a space inside. Become
On the other hand, an inward piece in which the mounting portion protrudes inside the main body along the bottom edge at one end in the length direction and both ends in the width direction of the main body, and the length from the bottom at the other end in the length direction of the main body. A molding that comprises an outwardly projecting piece protruding outwardly in a vertical direction, wherein the main body and the mounting portion are integrally formed.