JPH0847969A - Treatment of end part of opening part of molded ceiling for car - Google Patents

Abstract

PURPOSE:To perform the molding of a ceiling molded element by compression molding as is conventional and to simply treat an opening end part by a reduced number of parts. CONSTITUTION:A process arranging a ceiling molded element 2 having an opening part surrounded by an opening end part having an almost L-shape cross section on a receiving jig 3 and locally heating the vicinity of the opening end part to soften the same and a process involving the heated and sofened opening end part 23 on the side opposite to the opening part and cooling the involved opening end to shape the same into an almost U-shape cross-sectional shape are provided. Since the opening end part 23 has sufficient rigidity by a plate-shaped base material, the ceiling molded element can be certainly held to the receiving jig with high positioning accuracy and involving treatment can be automated. Further, the number of parts can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of treating an open end portion of a molded ceiling which is an interior material of an automobile having a sunroof or the like.

[0002]

2. Description of the Related Art As shown in FIG. 5, a molded ceiling 1 having an opening as an interior material is attached to the ceiling of an automobile having an opening such as a sunroof. The molded ceiling 1 has an opening 10 that serves as a sunroof, and an opening end 11 around the opening 10 has a substantially U-shaped cross section and is fixed to the vehicle body ceiling by fitting.

The molded ceiling 1 is manufactured by placing a soft skin material in a mold and heating a flat plate base material made of a thermoplastic resin to perform compression molding. It is difficult to form a U-shaped cross section at the time of compression molding because forming the shape is an undercut in the mold opening direction, and the opening end is processed as follows after compression molding. .

First, a skin material such as a fabric is placed on the mold surface, and a plate-shaped substrate softened by heating is placed in the mold and compression molded. As a result, as shown in FIG.
Ceiling molded body 1 including plate-shaped base material 101 and skin material 102
00 is obtained. At this time, the opening end of the plate-shaped base material 101 has a substantially L-shaped cross section so as not to be undercut in the mold opening direction, and the skin material 102 is the plate-shaped base material 101.
It extends longer than the tip.

Next, on the surface of the plate-like substrate 101 at the opening end,
As shown in FIG. 7B, a phosphorus hose 103 having a substantially U-shaped cross section is adhered with a hot melt adhesive or the like, and subsequently, FIG.
As shown in (3), the protruding tip of the skin material 102 is rolled up and adhered to the surface of the phosphorus hose 103 with a hot melt adhesive or the like. As a result, the open end has a substantially U-shaped cross section, and can be fitted to the vehicle body ceiling. Moreover, since the skin material 102 is exposed to the entire opening end portion, the appearance is not impaired.

As shown in FIG. 7D, the skin material 10
A process is also performed in which 2 is wound around the opening end of the substantially L-shape and adhered to the plate-shaped substrate 101, and the fastener 104 is adhered to the end of the plate-shaped substrate 101 with a hot melt adhesive or the like. In this case, the molded ceiling is fixed to the vehicle body by fitting and fixing the fastener 104 with the existing fastener on the vehicle body ceiling portion.

[0007]

However, in the above method of treating the open end of the molded ceiling, since the skin material protruding from the end of the plate-shaped base material is soft, the skin material can be reliably held and retained. Positioning is difficult, and automation of winding is difficult, so there is no choice but to rely on manual work. Further, since a phosphorus hose, a fastener or a hot melt adhesive is required, the number of parts is large, the man-hours for processing the opening end portion are large, and this is one of the causes of cost increase and weight increase.

Although it is possible to use a slide core or the like to make the opening end into a U-shaped cross section at the time of molding the ceiling molding, it is possible to bend the opening end into a U-shaped cross section by heating in ordinary compression molding. It is difficult and there is a problem that the plate-shaped substrate is broken. Further, when the heating temperature is raised, deformation and deterioration of the skin material and flow of the base resin occur, and therefore compression molding is difficult.

The present invention has been made in view of the above circumstances, and the molding of the ceiling molding is performed by compression molding as in the conventional case, and the processing of the opening end thereafter is simply performed with a small number of parts. With the goal.

[0010]

A method for treating an end portion of a molded ceiling opening for an automobile according to the present invention which solves the above-mentioned problems is a plate-like base material made of a thermoplastic resin and integrally laminated on the surface of the plate-like base material. The ceiling molded body having an opening surrounded by an open end having a substantially L-shaped cross section, which is made of the above-mentioned skin material, is arranged in a receiving jig, and the vicinity of the open end is locally heated by a heating means to be softened. And a step of winding the heat-softened opening end portion to the side opposite to the opening portion, cooling and shaping it into a substantially U-shaped cross section.

[0011]

In the end treatment method of the present invention, the ceiling molding is first formed by compression molding as in the conventional case. In this case, at the open end, it is not necessary to project the skin material longer than the plate-shaped base material as in the conventional case. This ceiling molded body is arranged in a receiving jig, and the vicinity of the opening end is locally heated by the heating means. As the heating means, it is sufficient that the plate-shaped substrate can be locally plasticized, and high frequency induction heating, hot air heating, hot plate heating (heater) or the like can be used.

After the plate-like base material near the opening end portion is thermally softened and plasticized, the opening end portion is bent to the side opposite to the opening portion by pressing and shaped into a substantially U-shaped cross section. At this time, the plate-shaped base material and the skin material are both bent. Then, the bent shape is fixed by cooling. In other words, since the opening end portion has sufficient rigidity due to the plate-shaped base material, it can be reliably held by the receiving jig, and even if it is automated, high positional accuracy and shape accuracy can be obtained. Since only the vicinity of the opening end is locally heated, the other parts are not deformed and the shape of the ceiling molded body is maintained.

[0013]

EXAMPLES The present invention will be specifically described below with reference to examples. This embodiment relates to an end treatment method for forming an open end 11 of a molded ceiling 1 as shown in FIG. First, a skin material 20 such as a non-woven fabric is placed on the die surface of a compression molding die, a thermoplastic plate-like base material 21 softened by heating is placed in the die, and a ceiling having an opening is formed by compression molding. The molded body 2 is formed. In this ceiling molded body 2, as shown in FIG. 6, the skin material 20 is integrally laminated on the surface of the plate-shaped base material 21, and the opening 2
The open end portion 23 forming 2 has a substantially L-shaped cross section.

The ceiling molded body 2 is arranged on the receiving jig 3 shown in FIGS. 1 to 3 with the plate-like base material 21 facing upward, and the tip of the opening end 23 is projected from the receiving jig 3. Has become. It should be noted that coils 30 and 31 are arranged in the receiving jig 3 close to the opening end 23. A winding head 32 is arranged on the upper surface of the receiving jig 3 so as to be able to move forward and backward by a driving device (not shown). The leading end surface of the winding head 32 is configured to contact the leading end surface of the open end portion 23 in the retracted position shown in FIG.

On the opening end 23, the opening end 23
The heating die 33 having a die surface having the same shape as the bent shape of is placed. In this heating die 33, an iron plate 34 as a conductor is arranged at a portion in contact with the tip end portion of the opening end 23 to be wound, and the other portion is made of Rosner board (glass-impregnated resin) as a non-conductor. Therefore, the coil 3
By applying a high frequency to 0 and 31, the iron plate 34 is induction-heated, and the heat thereof softens and plasticizes the tip of the opening end 23.

The heating conditions are as follows: high frequency oscillator output: 30 kw-60 kHz, heating temperature: 240 ° C. ± 10
C., and heated for 15 seconds under the conditions. Immediately thereafter, the high frequency output is stopped and the heating die 33 is removed. As shown in FIG. 2, the bending die 35 is arranged instead of the heating die 33, and the winding head 32 is driven forward to open the opening end 23 to the opening 2.
Press to the opposite side of 2. Since the open end portion 23 is heated to 240 ° C. and is thermally softened and plasticized, as shown in FIG. 3, the open end portion 23 is easily deformed by the pressure of the winding head 32 and has a cross section of approximately U along the surface of the bending die 35. It is shaped like a letter.

The open end 23 is deprived of heat by the bending die 35 and cooled for 15 seconds, and after its shape is fixed by cooling and solidification (60 ° C. or less), the winding head 32 retracts and the bending die 35 is removed. Thus, the molded ceiling 1 having the molded end portion 11 having a substantially U-shaped cross section shown in FIG. 4 is obtained. According to the edge processing method of this embodiment, the processing from placing the ceiling molding 2 on the receiving jig 3 to releasing the molded ceiling 1 can be performed in about 60 seconds, which is a conventional manual process. The processing time was 1/6 or less compared to the entrainment processing, and the productivity was remarkably improved.

Further, the attachment / detachment of the work to / from the receiving jig 3 can be automated, and the manual work can be eliminated, so that the number of steps can be reduced. In this example,
The case of processing one of the plurality of opening end portions has been described, but it goes without saying that the other opening end portions can be rolled up in exactly the same manner.

[0019]

[Effects of the Invention] That is, according to the method for treating the end portion of the molded ceiling opening for an automobile of the present invention, the ceiling molding having the plate-like base material having high rigidity is held by the jig to locally open the opening end. Since it is wound after heating, it is possible to automate not only the heating step and the winding step, but also the positioning step and the holding step, and all steps can be automated. Therefore, there are no problems caused by conventional manual work, and productivity is significantly improved.

Further, the phosphorus hose, fastener, adhesive and the like which have been conventionally used are not required, the cost can be reduced by reducing the number of parts, and the weight of the molded ceiling can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view showing a state in which heating is performed in an end portion processing method according to an embodiment of the present invention.

FIG. 2 is an explanatory cross-sectional view showing a state after heating and immediately before winding in the end portion treating method of one embodiment of the present invention.

FIG. 3 is an explanatory cross-sectional view showing a state after the open end portion has been rolled up in the end portion processing method according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of an open end portion of a molded ceiling obtained by the end treatment method according to the embodiment of the present invention.
FIG.

FIG. 5 is an overall perspective view of a molded ceiling obtained by the edge treatment method according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view of the main part near the opening of the ceiling molded body used in the edge processing method of the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a conventional edge processing method.

[Explanation of symbols]

1: Molded ceiling 2: Ceiling molded body
3: Receiving jig 10: Opening 11: Opening end
20: Skin material 21: Plate-shaped substrate 22: Opening
23: open end 30, 31: coil 32: winding head
33: Heating type

Front page continuation (72) Inventor Koichi Ishibashi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd.

Claims (1)

[Claims] 1. An opening made of a thermoplastic resin plate-shaped base material and a skin material integrally laminated on the surface of the plate-shaped base material and having an opening surrounded by an open end having a substantially L-shaped cross section. A step of arranging the ceiling molded body on a receiving jig and locally heating and softening the vicinity of the opening end portion by a heating means, and cooling the heat-softened opening end portion by winding it toward the side opposite to the opening portion. And a step of shaping it into a substantially U-shaped cross-section.