JPH03180311A - Molding and manufacture thereof - Google Patents

Abstract

PURPOSE:To make the difference between the thermal expansion of the metal sheet used as car body or the like and that of the molding smaller and make the mounting of the molding to the car body or the like easier by a method wherein metal core sheet is located at the central part of the molding and decorative material is integrally molded on its front side surface. CONSTITUTION:Metal core sheet 3, on the front side surface of which decorative material 10 is integrally molded, is provided over almost the whole length of molding 1. As a result, the whole length of the molding 1 is mainly made of metal core sheet 3. In addition, since material to be mounted by the molding 1 is the metal sheet, of which a car body is made, the thermal expansion coefficient of the metal core sheet 3 and of the material to be mounted by the molding are nearly equal to each other and the difference between both their thermal expansions becomes very small. Accordingly, regardless of the change of temperature, the molding is attractively mounted. Further since the molding 1 is rigid by means of the metal core sheet 3, its mounting work to the car body or the like is also easy. Furthermore, since the lustrous part 32 of the metal core sheet 3 is not covered by the decorative material 10, said part has luster.

Description

[Detailed description of the invention] [Industrial application field] The present invention is attached to the side surface of an outer panel of an automobile.

The present invention relates to a method of manufacturing a molding equipped with a positioning tool.

[Prior art]

Moldings are attached to the sides of automobiles for both decoration and protection.

The molding is mainly molded from semi-hard or soft synthetic resin such as polypropylene or polyvinyl chloride (PVC).

As shown in FIG. 11, conventional moldings include a molding 91 made entirely of synthetic resin;
Some are made of a double-sided adhesive tape 92 attached to the back side of the molding 91. This molding 91 is made with double-sided adhesive tape 92.

Attach to the vehicle body.

Furthermore, as shown in FIG. 12, there is also one in which a clip 931 as a positioning tool is integrally molded at the same time as the molding body 93. Furthermore, as shown in FIG. 13, a molding 94 in which bolts 95 as one positioning tool are fixed at predetermined positions has also been proposed (for example, Japanese Patent Laid-Open No. 61-1432
Publication No. 40).

The bolt 95 connects the substrate 951 to the back surface of the molding using resin.

[Problem to be solved]

However, in all of the above conventional moldings, the molding body is made only of synthetic resin. A large expansion/contraction difference occurs due to the difference (for example, 1 m
(7 to 12 trout/-300 to 80 degrees Celsius), therefore, due to this expansion and contraction, the molding may bend in the summer and come off the vehicle body in the winter. Furthermore, a gap is created between the end of the molding and the end of the vehicle body due to expansion and contraction, and for example, a gap is created between the end of the door and the end of the molding, resulting in poor appearance.

In addition, there is a molding using the double-sided adhesive tape.

Since there is no specific positioning part, when attaching this to the vehicle body, the operator is required to position it using a ring.

In addition, all of the malls mentioned above are flexible, so
Difficult to install linearly.

Further, in the molding shown in FIG. 13, a substrate 951 provided with bolts 95 is joined to a predetermined position of the molding body using synthetic resin, but positioning during manufacture is difficult.

In view of such conventional problems, the present invention has a small difference in thermal expansion with a metal plate of a car body, etc., and is easy to attach to a car body etc.
It is also an object of the present invention to provide a molding that is easy to manufacture and a method for manufacturing the same.

[Means for solving problems]

The present invention is a molding in which the front surface of a core metal plate is coated with a design material such as a synthetic resin, and the core metal plate has approximately the same length and width as the molding body.

The molding has a positioning tool fixed at a predetermined position, and the positioning tool passes through a through hole in a core metal plate and is integrally molded with the core metal plate.

What is most noteworthy about the present invention is that the core metal plate coated with the design material has approximately the same length as the molding body, and a positioning tool is fixed at its mounting position, and the positioning tool has the through hole. It penetrates and is integrally molded with the core metal plate.

The above-mentioned positioning tools include bolts, clips, bosses, etc. The positioning tool is made of polyacetal.

This positioning tool, which is preferably made of synthetic resin such as polyamide or hard PvC, is installed by inserting it into a positioning hole in the outer panel of the vehicle body or the like.

Further, as a method for integrally molding the three positioning tools in the through hole portion of the core metal plate, there is an integral molding method as described below.

Further, one positioning tool is provided in a protruding state on the back side of the molding, that is, on the side opposite to the surface on which the decorative material is formed. The head of the positioning tool 9 is located on the front side of the metal core plate.

Further, it is preferable that the head of the positioning tool 9 is located on the same plane as the front surface of the core metal plate, or inside this, so that when the design material is injection molded on the front surface of the core metal plate,
The surface of the design material can be finished beautifully and flatly (see examples).

Further, the core metal plate has a length and width that corresponds to the shape of the molding to be obtained, and is approximately the same as the molding body formed by the core metal plate and the decorative material coated on the surface thereof. Also,
Materials for the core metal plate include stainless steel plates, aluminum plates, PVC steel plates, and plated steel plates.

In addition, the decorative material is integrally coated on the front side of the molding by injection molding, etc., but the decorative material may be applied to all or part of the front side. In other words, when stainless steel is used as the core metal plate When it is desired to provide a shiny metal design on a part of the molding, a part of the front surface can be prevented from being covered by the design material during the injection molding.

In addition, the above-mentioned design materials include rubber-modified polypropylene,
Examples include soft 1fPVc and thermoplastic elastomer.

In addition, as a method for manufacturing the above-mentioned molding, when manufacturing a molding in which the front surface of a core metal plate is coated with a design material such as a synthetic resin and also has a positioning tool, the positioning tool is placed at a predetermined position on the core metal plate. A first intermediate member having a through hole for integral molding is manufactured, and the core metal plate is then placed in a first injection mold and a synthetic resin for a positioning tool is injected to form the through hole. A second intermediate member having a positioning tool integrally formed therein was then manufactured.

It has a positioning tool characterized in that the second intermediate member is placed in a second injection mold and the design material is injected, thereby integrally injection molding the design material on the front side of the core metal plate. There is a method for manufacturing malls.

What is most noteworthy about this method is that a second intermediate member having a positioning tool made of synthetic resin integrally molded using an injection mold is manufactured using the first intermediate member provided with the above-mentioned through hole. On the other hand, a molding is manufactured by integrally molding a design material on the front side of a core metal plate by injection molding. The first positioning tool is formed by penetrating the through hole of the core metal plate.

Its head is on the front side of the core metal plate. Further, the main body (locking side) of the positioning tool protrudes from the back side of the core metal plate.

The first injection mold is used for integral molding of the positioning tool, and the second injection mold is used for covering the design material.

Furthermore, when injection molding the decorative material, a second injection mold is used in which the positioning tool protruding from the back side of the core metal plate is not covered by the decorative material (see Figure 1O).

[Function] The molding according to the present invention has a metal core plate at its center, and a design material is integrally molded on the front side of the molding. Therefore, the entire length of the molding is mainly composed of a metal core plate. The mating material to which the molding is attached is a metal plate such as a door of a vehicle body. Therefore, the thermal expansion coefficients of the molding and the vehicle body, which is the material to which it is attached, are very similar.

The difference in thermal expansion between the two is reduced. Therefore, the molding can be installed with good appearance regardless of temperature changes.

In addition, the molding has a core metal plate, so it has excellent rigidity.

It has linearity and is easy to attach to the vehicle body.

Furthermore, since the positioning tool is pre-installed on the molding at a predetermined position, the mounting position on the vehicle body etc. can be easily determined without having to rely on a ring like in the past.

Installation is easy and reliable.

Further, in the present invention, the molding can be obtained by integrally molding the design material on the core metal plate to which the positioning tool is fixed as described above, and manufacturing is easy.

Further, according to the above manufacturing method, it is possible to easily integrally mold the second intermediate member in which the first positioning tool is provided at a predetermined position with respect to the metal core plate, and it is also possible to easily integrally mold the design material on the second intermediate member. As described above, an excellent molding can be obtained.

[Effects] Therefore, according to the present invention, it is possible to provide a molding that has a small difference in thermal expansion with the vehicle body, is easy to install, and is easy to manufacture, and a method for manufacturing the same.

〔Example〕

First Embodiment FIGS. 1 and 2 show a mall according to an embodiment of the present invention.
This will be explained using figures.

First, one example of the molding 1 is as shown in the figure.

A design material 10 made of synthetic resin is integrally injection molded on the front side of the core metal plate 3, and a clip 2 as a positioning tool is projected from the back side E of the core metal plate 3.

The clip 2 passes through the through hole 341 of the core metal plate 3,
It is injection molded integrally with the core metal plate 3.

The clip 2 has a through hole 34 in the core metal plate 3.
The recess 34 provided with the head 21 has a head 21 on its front side, and a fixing part 23 on its back side. Also.

A locking portion 22 is provided below the fixing portion 23 . Further, the head 21 is fixed at approximately the same height as the uppermost surface of the front surface of the core metal plate 3 (see FIGS. 8 and 9).

In addition, the core metal plate 3 has a right end 35 on the right side of the recess 34 in which one through hole 341 is provided as shown in FIGS. 9 and 4 and 5.
．． To the left of that is the center section 33. It has a glossy part 32 and a left end 31 in this order. In addition, the length of the core metal plate 3 is almost the entire length of the molding, and the width of the core metal plate 3 is slightly narrower than the molding body.
The decorative material 10 is coated on the front surface of the core metal plate 3, except for the glossy portion 32. In addition, a part of the design material 1O wraps around the back side of the right end 35 and left end 31 of the core metal plate 3, so that the two are firmly integrated.

Further, the core metal plate 3 is a stainless steel plate, the clip 2 is a polyacecool resin, and the design material 1O is a soft PVC.

As described above, in the molding 1 of the nine examples, the core metal plate 3 is provided over almost the entire length thereof, and the design material 10 is integrally molded on the front side of the core metal plate 3. Therefore, the entire length of the molding 1 is mainly composed of a metal core plate 3. The material to which the molding 1 is attached is a metal plate of the vehicle body. Therefore, the thermal expansion coefficients of the core metal plate 3 and the material to which it is attached are extremely similar, and the difference in thermal expansion between the two becomes very small. Therefore, the molding can be installed with good appearance regardless of temperature changes.

Furthermore, since the molding has rigidity due to the core metal plate 3, it is easy to attach it to a vehicle body or the like.

In addition, in the molding 1 of the two examples, the shiny part 3 of the core metal plate 3
2 is not covered by the design material 10, this portion has gloss. Therefore, it is a molding with excellent design material properties.

In addition, since the upper surface of the head 2I of the clip 2 is at the same height as the uppermost surface of the core metal plate 3 (FIGS. 7 to 9), the surface of the decorative material 10 covering the top thereof is also It's smooth.

If the head 21 of the clip 2 protrudes beyond the top surface of the core metal plate 3.

During injection molding of the decorative material 10, sink marks may occur on the surface of the upper decorative material 10, and a concave pattern may be formed.

Second Embodiment A method of manufacturing the molding 1 shown in the first embodiment will be explained with reference to FIGS. 3 to 1O.

First, as shown in FIG. 3, a stainless steel plate 39 for a core metal plate is prepared, and this is formed into the shape of the core metal plate 3 as shown in FIGS. 4 and 5, and a through hole 341 is bored therein. .

The core metal plate 3 was explained in the first embodiment. A first intermediate member is thus obtained.

Next, the metal core plate 3 as the first intermediate member is placed in the first injection mold 4 shown in FIG. 6, and a synthetic resin for making the clip is press-fitted through the injection port 45.

That is, the first injection mold 4 includes an upper mold 41 and a lower mold 42. The upper mold 41 has a resin press-fitting path 451. Further, the lower mold 42 has a cavity 4 for molding the clip 2.
01,402,403. Cavity 401,4
02 and 403 are.

Clip head 21. This is the part where the locking part 22 and the fixing part 23 are formed.

In addition, the upper mold 41. The lower mold 42 has spaces 416 and 426 into which the left end 31 of the core metal plate 3 is inserted from the center when the core metal plate 3 is placed between them. Between the spaces 416 and 426 and the cavities 401 and 403, weirs 411 and 421 are provided to prevent the design material from flowing into the spaces 416 and 426.

Also, the right end 35 side of the core metal plate 3 is also one-car type 41.
42 has spaces 417 and 427, and the cavity 401
．． It has a weir between 403 and 412°422.

During clip molding, from the injection port 45,
Press-fit molten polyacetal resin as the material for the clip. In this way, as shown in FIGS. 7 to 9,
A second intermediate member 30 is obtained. The second intermediate member 30 is
A clip 2 is integrally molded at a predetermined position of a core metal plate 3.

The clip 2 is formed by penetrating the through hole 341 of the core metal plate 3, has a head 21 and a fixing part 23 sandwiching the recess 34 of the core metal plate 3, and has a locking part 22 below.

Next, as shown in FIG. 10, the second intermediate member 3°0 is placed in the second injection mold 5, and a design material is press-fitted to produce a molding.

The second injection mold 5 includes an upper mold 51 and a lower mold 52. The upper die 51 has a resin press-fitting path 541.

It has cavities 55 and 56 for molding design materials.

The cavity 55 extends from the right end 35 of the core metal plate 3 to the center portion 3.
This is for molding the front side of No. 3.

Further, the cavity 56 is for molding the front surface of the lower left end 31 of the core metal plate 3. and.

A contact surface 511 is provided between the cavities 55 and 56 to prevent the surface of the glossy portion 32 from being covered with the decorative material. Also, the left end 31. Some design material is also formed on the right end 35 and the lower end.

The lower mold 52 also has a space 524 into which the clip 2 of the second intermediate member is inserted. The space portion 524 and the cavity 55. Alternatively, weirs 522 and 521 are provided between the cavity 56 and the design material to prevent the inflow of the design material. That is, the back surface of the core metal plate 3 comes into contact with the top of the weirs 521 and 522.

Next, molten soft '3 (PVC) for design material is press-fitted into the injection mold 5 through the injection port 54. As a result, the molding shown in FIGS. 1 and 2 of the first embodiment is obtained. .

According to this example as described above, it is possible to manufacture an excellent molding as shown in the first example.

[Brief explanation of drawings]

1 and 2 show the molding of the first embodiment, FIG. 1 is a sectional view taken along the line A-A in FIG. 2, FIG. 2 is a perspective view of the molding, and FIGS. 3 to 10 are The manufacturing method of the molding of the second embodiment is shown, FIG. 3 is a perspective view of a steel plate, FIG. 4 is a perspective view of a core metal plate, FIG. Figure 6 is the first
A sectional view of the injection mold, FIG. 7 is a perspective view of the second intermediate member,
Fig. 8 is a sectional view taken along the line C-C in Fig. 7, Fig. 9 is an enlarged sectional view of the clip molding part, Fig. 1O is a sectional view of the second injection mold, and Figs. 11 to 13 are Three types of conventional moldings are shown, FIG. 11 is a perspective view of the first molding, and FIG. 12 is a perspective view of the second molding.
FIG. 13 is a cross-sectional view of the third molding. FIG. 13 is a back view of the third molding. 1...Mall. 10...Design material. 2...Clip. 21...Head. 22...Locking part. 23...Fixed part. 3... Core metal plate. 30, second intermediate member. 341...Through hole. 4.5...Injection mold.

Claims (3)

[Claims] (1) A molding in which the front surface of a core metal plate is coated with a design material such as a synthetic resin, the core metal plate having approximately the same length and width as the molding body, and having a positioning tool at a predetermined position. 1. A molding having a positioning tool which is fixed and is integrally formed with the core metal plate by passing through a through hole in the core metal plate. (2) A molding having a positioning tool according to claim 1, wherein the head of the positioning tool on the front side of the core metal plate is on the same plane as the core metal plate. (3) When manufacturing a molding that is made by coating the front side of a core metal plate with a design material such as synthetic resin and also has a positioning tool, through-holes for integrally molding the positioning tool at a predetermined position of the core metal plate are provided. The first intermediate member provided is manufactured, and then the core metal plate is placed in the first injection mold and a synthetic resin for the positioning tool is injected, thereby integrally forming the positioning tool at the through hole part. Then, the second intermediate member is placed in a second injection mold and the decorative material is injected, thereby integrally applying the decorative material to the front surface of the core metal plate. A method for manufacturing a molding having a positioning tool, characterized by injection molding.