JPH07323440A - Garnish with inner seal and production thereof - Google Patents

Abstract

PURPOSE:To reduce the weight of an inner seal for attachment to door trim and impart thereto a structure which permits an easy recycle. CONSTITUTION:By a two-color injection molding method is formed an integral structure consisting of a garnish body 21 intended for attachment to the rear face of a waist part 13 of a door trim 10 and made of the injection molded body of a rigid resin and seal lip parts 22 made of the injection molded body of a blexible resin with a resin films 23 formed thereon and excellent in slidability with respect to the slided surface of door window glass 30, thereby contriving the reduction of the weight and cost. PP resin is used in the garnish body 21 and TPO is used in the seal lip part 22 to make the recycle easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a garnish with an inner seal, which is installed on the upper edge of a door trim and seals a door window, and a method for manufacturing the garnish.

[0002]

2. Description of the Related Art Normally, a door trim for automobiles is installed as an interior material on the interior side of a door panel of a passenger car, and an inner seal is provided at the upper edge of the door trim in order to seal the elevating door window glass. is set up.

For example, as shown in FIG. 13, a long garnish 2 having a substantially L-shaped cross section is attached to the back surface of the waist portion of the door trim 1. This garnish 2
On the other hand, an inner seal 3 for sealing the door window glass is attached.

The inner seal 3 is formed by extruding a soft resin such as a soft vinyl chloride resin in order to ensure a good sealing property with the door window glass, and is internally formed to have a shape retaining property. The metal cored bar 4 is inserted, and the lip surface is subjected to flocking processing or the like.

Then, the inner seal 3 is attached to the door trim 1.
For mounting, the garnish 2 is provided with mounting holes 2a at appropriate intervals, and the core metal 4 corresponding to the mounting holes 2a.
Actually, the inner seal 3 is attached to the door trim 1 by cutting up and forming the locking claw 4a, inserting the locking claw 4a into the mounting hole 2a, and then bending.

The garnish 2 is usually made of an injection-molded product of inexpensive general-purpose synthetic resin such as polypropylene resin, and is fixed to the back surface of the waist portion of the door trim 1 by ultrasonic welding or the like.

[0007]

As described above, since the conventional inner seal 3 has the structure in which the metal cored bar 4 is inserted inside the soft vinyl chloride resin, the weight is increased and the metal material and the resin are used. Since it is a composite of materials and the inner seal 3 and the garnish 2 are different resins, they are not suitable for recycling.

Further, in addition to the soft vinyl chloride resin as the base, a metal cored bar 4 is inserted inside and the surface of the lip portion is subjected to flocking, which leads to an increase in product cost and the inner seal 3. The work of attaching it to the door trim 1 via the garnish 2 is troublesome, which is a major factor in reducing productivity.

The present invention has been made in view of such circumstances, and the inner seal and the garnish are integrated with each other to secure the shape retention by the garnish, thereby eliminating the metal cored bar and reducing the weight. In addition, it is an object of the present invention to provide a garnish with an inner seal and a method for manufacturing the garnish, which can reduce the number of troublesome steps for mounting the inner seal and are suitable for recycling.

[0010]

In order to achieve the above object, a garnish with an inner seal according to the present invention comprises:
A garnish body made of an injection-molded body made of a hard resin and a lips made of an injection-molded body made of a soft resin, which are fixed to the back surface of the waist of the door trim, and a seal lip section coated with a resin film on the surface that makes sliding contact with the door window. It is characterized by being molded.

Further, in the method of manufacturing a garnish with an inner seal, a resin film for forming a resin film by in-mold coating a slidable resin on the mold surface of the core mold cavity A through a cavity mold spray passage. And a step of forming a seal lip portion by injection-molding a soft resin into the cavity A of the core die through a first nozzle provided in the cavity die, and a seal lip portion, The core mold holding the above is operated so as to connect the cavity A of the core mold and the cavity B of the mold, and then the hard resin is injected and filled into the cavity B through the second nozzle of the mold to seal the cavity. And a garnish body molding step of integrally molding the lip portion and the garnish body.

[0012]

As apparent from the above construction, since the garnish body made of the injection molded body of the hard resin and the seal lip portion made of the injection molded body of the soft resin are integrated, the rigidity of the garnish body causes It is possible to abolish the metal core bar that was conventionally inserted.

Furthermore, since metal materials can be eliminated,
It is suitable for recycling, and if the resin material of the same system is used for the garnish body and the seal lip portion, it becomes more suitable for recycling.

Further, since the garnish main body and the seal lip portion are integrally formed by two-color molding, the troublesome work of attaching the inner seal to the garnish as in the conventional case can be eliminated.

In addition, if the surface of the seal lip portion that is in sliding contact with the door window glass is spray-coated with a slidable resin in advance, troublesome flocking can be eliminated.

[0016]

Embodiments of the garnish with an inner seal and the method of manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an automobile door trim having a garnish with an inner seal according to the present invention, FIG. 2 is a sectional view showing the structure of a garnish with an inner seal according to the present invention, and FIG. 3 is an inner according to the present invention. FIG. 4 is an external view of a molding apparatus used in the method of manufacturing a garnish with a seal, FIG. 4 is a sectional view showing a mold structure in the molding apparatus shown in FIG. 3, and FIGS. 5 to 9 are methods of manufacturing a garnish with an inner seal according to the present invention. FIG. 6 is a cross-sectional view showing each step in FIG.

10 to 11 are sectional views showing the operation of the mold in another embodiment of the molding apparatus, and FIG. 12 is a sectional view showing a modified example of the garnish with an inner seal according to the present invention.

First, as shown in FIGS. 1 and 2, an automobile door trim 10 has a core material 11 having shape retention and mounting rigidity to a vehicle body panel, and a cushioning property and a decorative property on the surface of the core material 11. Is formed by adhering a skin material 12 that gives the garnish 2 on the back surface of the waist portion 13 of the door trim 10.
0 is set.

As shown in the enlarged view of FIG. 2, the garnish 20 with an inner seal is fixed to the back surface of the waist portion 13 of the door trim 10, and has a garnish body 21 of a long body having a substantially L-shaped cross section, and a garnish. Body 2
It is composed of a seal lip portion 22 that is integrally connected to the first flange portion 21a and is in sliding contact with the door window glass 30, and a resin coating 23 formed on the outer surface of the seal lip portion 22.

More specifically, the garnish body 21
Since it is desirable to have a shape-retaining property and a shape-retaining property, it is made of an injection molded body of a hard resin such as polypropylene resin, and the seal lip portion 22 makes an elastic contact seal with the door window glass 30 as described above. Since it is preferable to have an excellent elastic action, a thermoplastic olefin (hereinafter referred to as TPO) is used in this embodiment, and as the resin coating 23, in this embodiment, a sliding special olefin resin ( For example, Lübmer (trade name) manufactured by Mitsui Petrochemical Co., Ltd. is used.

The inner seal garnish 20 is attached to the back surface of the waist portion 13 of the door trim 10 by ultrasonic welding or the like.

As described above, the garnish 20 with an inner seal according to the present invention has a structure in which the garnish main body 21 and the seal lip portion 22 are integrated, so that the garnish main body 21 is inserted inside due to its shape retention. Since the metal core is not required and the weight is reduced, the conventional inner seal requires a troublesome mounting work for bending the locking claw, but the present invention has an integrated structure.
There is no man-hour for mounting the inner seal, and productivity can be greatly increased.

Moreover, if a hard resin such as polypropylene resin is used as the garnish body 21 and a resin of the same material such as TPO is used as the seal lip portion 22, the metal core bar can be eliminated. Since the resin material is the same material, it is suitable for recycling.

Next, a method for manufacturing the above-mentioned garnish 20 with an inner seal will be described below.

First, the overall structure of the molding apparatus is shown in FIG.
The mold structure in the molding apparatus will be described below.

As shown in FIG. 3, the molding apparatus 40 used in the present invention is an injection molding apparatus 5 having a cavity mold 60.
0, and a core mold 70 which is paired with the cavity mold 60 and has a rotating mechanism.

Further, the details of the cavity mold 60 and the core mold 70 will be described with reference to FIG. 4. In the cavity mold 60, a slide mold 61 slides downward in the plane of the drawing in consideration of mold release of the molded product. Cavity mold 6 equipped as possible
At 0, a first nozzle 62 and a second nozzle 63 are drilled, and a spray passage 64 is provided.

On the other hand, the core mold 70 comprises the rotating shaft 7 of the rotating mechanism.
Cavity A that is connected to 1 and can rotate 180 degrees as one cycle and forms the seal lip portion 22.
Are formed on the parting surface.

Similarly, the cavity mold 60 is provided with a cavity B forming the garnish body 21.

A process of molding the garnish 20 with an inner seal shown in FIG. 2 by using the molding device 40 having the above structure will be described step by step.

First, the core mold 70 starts to approach the cavity mold 60, and after the mold clamping between the cavity mold 60 and the core mold 70 is completed, as shown in FIG. 5, the spray passage 64 of the cavity mold 60. Through, the slidable special olefin resin 80 is in-mold coated on the mold surface of the cavity A, and the resin film 23 is formed on the mold surface.

Thereafter, as shown in FIG. 6, the first nozzle 6
The TPO 81 is injection-filled into the cavity A through 2, and the seal lip portion 22 integrated with the resin coating 23 is injection-molded.

After a lapse of a certain cooling time, the rotary shaft 71 rotates 180 degrees around the axis, and the core mold 70 moves to the position shown in FIG.

At this time, the seal lip portion 22 injection-filled into the cavity A of the core die 70 comes to a position facing the cavity B of the cavity die 60.

Thereafter, as shown in FIG. 8, the second nozzle 6
The polypropylene resin 82 is injected and filled into the cavity B through 3, and the seal lip portion 22 and the garnish body 21 are integrally molded.

After that, after a certain cooling time, FIG.
When the core mold 70 slides in the direction of the arrow to open the mold, the slide mold 61 also slides in the direction of the arrow to separate the garnish 20 with the inner seal from the cavity mold 60, as shown in FIG. Good.

Next, FIGS. 10 to 11 show a core mold 70.
Shows a modified example of the above, not the rotary drive type described above,
A slide type core mold 70 may be used. As shown in FIG. 10, after the core mold 70 is subjected to an in-mold coating process of the resin coating 23 and an injection molding process of the seal lip portion 22, the core mold 70 is moved downward. The mold 70 may be slid, and the polypropylene resin may be injected and filled into the cavity B through the second nozzle 63 to integrally mold the seal lip portion 22 and the garnish body 21 as shown in FIG.

As shown in FIG. 12, the garnish 20 with an inner seal may have a structure in which an aluminum foil 24 is integrated at the top or the seal lip 22 may have a hollow structure.

To integrate the aluminum foil 24, it is possible to insert the aluminum foil 24 into the cavity B of the cavity mold 60 in advance, and the integration can be easily achieved. If the portion 22 has a hollow structure, the followability with respect to the door window glass 30 becomes good, and there is an advantage that smoother operability of the door window glass 30 can be expected.

[0041]

As described above, the present invention has the following special operational effects.

(1) Since the garnish with the inner seal according to the present invention integrates the garnish body made of the hard resin and the seal lip portion made of the soft resin by two-color injection molding, the conventional inner seal is used. The metal core bar inserted inside can be abolished, PP resin is used for the garnish body, and T is used for the seal lip.
If PO is used, since it is a resin of the same system, there is an effect that recycling processing can be easily performed.

(2) A garnish with an inner seal according to the present invention comprises a garnish body made of a hard resin,
Since the seal lip part made of soft resin is integrated by two-color injection molding, the conventional metal core bar can be abolished, and since it is composed only of a resin material with a specific gravity of 1.0, it is greatly lightweight. It has the effect of contributing.

(3) A garnish with an inner seal according to the present invention comprises a garnish body made of a hard resin,
Since the seal lip made of soft resin is integrated by two-color injection molding, the inner claw of the inner seal is inserted into the mounting hole on the door trim side and then bent as before. This has the effect that the troublesome work of mounting the seal can be eliminated and the productivity can be greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a door trim to which a garnish with an inner seal according to the present invention is attached.

FIG. 2 is a sectional view showing the structure of an embodiment of a garnish with an inner seal according to the present invention.

FIG. 3 is an external view of a molding apparatus used for manufacturing the garnish with an inner seal shown in FIG.

4 is a cross-sectional view showing a mold configuration in the molding apparatus shown in FIG.

FIG. 5 is a cross-sectional view showing an in-mold spray coating step in the method of manufacturing a garnish with an inner seal according to the present invention.

FIG. 6 is a sectional view showing an injection molding process of a seal lip portion in the method of manufacturing a garnish with an inner seal according to the present invention.

FIG. 7 is a sectional view showing the operation of the core mold in the molding apparatus used in the method of the present invention.

FIG. 8 is a cross-sectional view showing an injection molding process of a garnish body in the method of manufacturing a garnish with an inner seal according to the present invention.

FIG. 9 is a sectional view showing a mold opening state of a molding apparatus used in the method of the present invention.

FIG. 10 is a sectional view showing an injection molding process of a seal lip portion in another embodiment of the method of the present invention.

FIG. 11 is a cross-sectional view showing the forming process of the garnish body in another embodiment of the method of the present invention.

FIG. 12 is a sectional view showing the structure of another embodiment of the garnish with an inner seal according to the present invention.

FIG. 13 is an explanatory view showing a conventional inner seal attachment structure.

[Explanation of symbols]

 10 Automotive Door Trim 13 Waist Part 20 Garnish with Inner Seal 21 Garnish Body 22 Seal Lip Part 23 Resin Coating 24 Aluminum Foil 30 Door Window Glass 50 Injection Molding Device 60 Cavity Type 61 Sliding Type 62 First Nozzle 63 Second Nozzle 64 For Spraying Passage 70 Core type 71 Rotating shaft 80 Sliding special polyolefin resin 81 TPO 82 PP resin

Claims (4)

[Claims] 1. A waist portion (1) of a door trim (10).
3) A garnish body (21) fixed to the back surface and made of a hard resin injection molded body, and a soft resin injection molded body, and a resin film (23) is coated on the surface that is in sliding contact with the door window (30). Seal lip (2
2) A garnish with an inner seal, characterized by being integrally molded with and. 2. The garnish body (21) is made of a polyolefin resin, the seal lip portion (22) is made of a thermoplastic olefin resin, and the resin coating (23) is made of a slidable special olefin resin. The garnish with an inner seal according to claim 1. 3. A resin film (23) is formed by in-mold coating a slidable resin (80) on the mold surface of a cavity A of a core mold (70) through a spray passage (64) of the cavity mold (60). ) Is formed, and a soft resin is injected and filled into the cavity A of the core die (70) through the first nozzle (62) formed in the cavity die (60) to form a seal lip portion. (22)
And a cavity B of the cavity mold (60) by movably operating the core mold (70) holding the seal lip part (22). Garnish for integrally molding the seal lip portion (22) and the garnish body (21) by injecting a hard resin into the cavity B through the second nozzle (63) of the cavity mold (60) after connecting the A method of manufacturing a garnish with an inner seal, comprising: a main body molding step. 4. The method of manufacturing a garnish with an inner seal according to claim 3, wherein the core mold (70) repeats a rotating operation of 180 degrees as one cycle by the rotating mechanism (71).