JPS6143563A - Method of molding opening section of instrument pad - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming an open logo of a side defroster outlet, etc. in an instrument pad for a vehicle.

(Prior Art) and (Problems to be Solved by the Invention) As a conventional method for forming an opening of an instrument pad, for example, the method shown in FIGS. 14 and 15 is known.

In this conventional method, an opening 101 is opened in advance in a resin core material 100, and when foaming with urethane, a sealing tape 102 is attached to the opening 101 to close the opening. Urethane is foamed between the seal tape 102 and the skin 103, and after foaming,
Skin 103°, urethane foam layer 104 and seal tape 1
02 was cut using a cutter 105 to form an opening in the instrument pad.

In the figure, 106 is a finisher, and 107 is a clip.

Incidentally, an example of an instrument pad molded using such conventional technology is "Nissan Cedric Gloria Service Bulletin (No. 484)" published in June 1981.

However, such a conventional method has a problem in that it takes time and effort to apply the sealing tape 102 to prevent urethane from leaking during the urethane foaming process, which is disadvantageous in terms of cost.

As a method for forming the opening of an instrument pad that does not cause the above-mentioned problems, there is a method shown in FIGS. 16 and 17.

In this conventional method, an opening is not formed in the resin core material 100 in advance, and when the resin core material 100 is foamed with urethane, the resin core material 100
0 itself is used as a sealing surface to foam the skin 103 and the foamed urethane layer 10 using a cutter 105 after foaming.
4 is removed, and the resin core material 100 is further punched out using a cutter 108 to form an opening 101.

However, in such a method, after urethane foaming, the resin core material 100 is punched out using the cutter 108 to form the opening lO1, so the fractured surface 109 after punching becomes an uneven surface. , the shape accuracy decreases due to burrs appearing during punching, etc., and the opening 1
Clip 1 of finisher 106 attached to 01
07, and there was a problem in that it caused rattling and chattering noises after installation.

(Means for Solving the Problems) That is, the present invention was made with the aim of solving the above-mentioned problems, and in order to achieve this purpose, the present invention uses a resin core material and a resin core material. A method for forming an opening for an instrument pad, which forms an opening for a finisher that is attached by clip engagement to an instrument pad made of a foamed urethane layer and a skin,
A clip engagement structure is formed in advance in the opening part of the resin core material at the core material molding stage, and when urethane is foamed, urethane is foamed between the resin core material and the skin, and the urethane is foamed between the resin core material and the skin. After foaming, unnecessary parts of the skin, foamed urethane layer, and resin core material were removed, and the openings were shaded.

(Function) Therefore, according to the method for forming the opening of an instrument pad of the present invention, since urethane is foamed between the resin core material and the outer skin, the resin Urethane foaming can be performed without requiring pretreatment such as pasting a sealing tape or the like, unlike when urethane foaming is performed using a core material.

In addition, because a clip engagement structure is formed in advance at the core material molding stage in the part that will become the opening of the resin core material, even if the unnecessary part of the resin core material is removed and the opening is molded, the finisher will not work. The shape accuracy of the opening that engages with the clip can be made high.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing this embodiment, a method for forming an opening in an automobile instrument pad will be explained as an example.

First, the opening structure of an instrument pad formed by the opening forming method of the first embodiment will be explained with reference to FIGS. 1 to 3.

Reference numeral 1 denotes an instrument pad, which is formed by integrally foaming the entire surface of a resin core material 2 (also referred to as an instrument panel) integrally molded by injection molding,
As shown in the cross section, this instrument pad 1 is composed of a core material 2 made of resin, a foamed urethane layer 3, and a skin 4 made of vinyl chloride resin or the like.

5 is an opening provided in the instrument pad 1 for use as a side defroster outlet, etc.;
This opening 5 has a finisher 7 provided with a clip 6.
is attached by clip engagement.

Note that this opening 5 is formed by cutting out the skin 4 and the foamed wax tongue calendar 3, and punching out the resin core material 2. In this case, a part of the slit 68 as a clip engagement structure provided in advance at the stage of forming the core material remains as the engagement surface 9 with the clip 6, and the other punched end surface becomes the fracture surface 10. .

Next, the opening forming method of the first embodiment will be explained.

In explaining this method, the resin core material forming step, the urethane foaming step, the opening cutting step, and the opening punching step will be explained separately below.

(B) Resin core material molding process (Figure 4) This resin core material molding process is a process in which the resin core material 2 is integrally molded by injection molding using polypropylene composite material, etc. , in the first embodiment,
A slit hole 8 as a clip engagement structure is provided in the portion that will become the opening 5.

(b) Urethane foaming process (Figure 5) This urethane foaming process is a process of forming urethane foam M3 between the resin core material 2 and the skin 4, and in this foaming process, the process shown in Figure 5 As shown, the resin core material 2 is placed on the lower mold 11, the outer skin 4 is pasted on the inner surface of the upper mold 12, and the space 13 between the resin core material 2 and the outer skin 4 is blown from the pipe 14. This is carried out by blowing high-temperature liquid urethane into foam, solidifying it by lowering the temperature, and removing the upper mold 12 and lower mold 11 after the foaming and solidification are completed.

Incidentally, since the slit hole 8 previously provided in the resin core material 2 is small, the amount of urethane leaking from this slit hole 8 is very small and does not pose a problem during manufacturing.

(c) Opening section cutting step (Fig. 6) This opening section cutting step is a step of opening the outer skin 4 and foamed urethane cover 3 of the instrument pad 1 which has undergone the urethane foaming step, and in this step, a cutter is used. 1
5, a cut is made at a position slightly outside the slit hole 8, and the skin 4 and foamed urethane layer 3 inside the cut are removed.

(d) Opening punching step (FIG. 7) This opening punching step is a step of opening the resin core material 2 of the instrument pad 1 that has undergone the opening cutting step, and in this step, the cutter 16 This is done by cutting approximately on the center line of the slit hole 8 and removing the cut portion of the resin core material 2.

Next, a second embodiment shown in FIGS. 8 and 9 will be described.

This embodiment is an example in which a clip engagement groove 17 is provided in advance as a clip engagement structure in the resin core material molding process, and as shown in FIG. The clip 6 is engaged with the retaining surface 18 formed by providing the clip engagement groove 17.

The clip engagement groove 17 may be provided over the entire circumference of the opening, or may be partially provided only in the portion that engages with the clip 6, as in the first embodiment. .

Next, a third embodiment shown in FIGS. 10 and 11 will be described.

This embodiment is an example in which a clip engaging protrusion 19 is provided in advance as a clip engaging structure in the resin core material molding process, and the inside of the clip engaging protrusion 19 is cut with a cutter 16 as shown in FIG. When the finisher 7 is attached by punching, the clip 6 is engaged with the retaining surface 20 formed by providing the clip engaging protrusion 19.

Note that, similarly to the second embodiment, the clip engaging protrusion 19 may be provided all around the opening or may be provided partially.

Next, a fourth embodiment shown in FIGS. 12 and 13 will be described.

This embodiment is an example in which a clip engagement step surface 21 is formed in advance as a clip engagement structure in the resin core material molding process, and as shown in FIG.
In the attached state, the clip 6 is engaged with the retaining surface 22 formed by providing the clip engaging stepped surface 21.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific methods and configurations are not limited to these embodiments, and changes in the specific methods may be made without departing from the gist of the present invention. Even if there is, it is included in wood inventions.

For example, the clip engagement structure is not limited to the embodiments as long as the finisher is sometimes attached to a structure in which a clip engagement surface is formed.

Further, the opening is not limited to a conditioned air outlet from an air conditioner, but may be an opening to which various devices are attached.

(Effects of the Invention) As explained above, according to the method for forming the opening of an instrument pad of the present invention, urethane resin can be used without the troublesome and time-consuming pretreatment of closing the opening with sealing tape or the like. Foaming can be performed, and since a clip engagement structure is formed in advance at the core material molding stage in the part that will become the opening of the resin core material, the unnecessary part of the resin core material can be removed and the opening can be made. Even if the finisher is molded, the shape of the opening surrounding the finisher that engages with the finisher clip can be made to have a high degree of precision, and the finisher can be installed without rattling or chattering noises. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the opening of an instrument pad formed by the opening forming method of the first embodiment of the present invention, and FIG. 2 is a perspective view showing the first instrument pad with a finisher attached to the opening.
Figure 3 is a cross-sectional view taken along line I-I, Figure 3 is a perspective view showing an automobile instrument pad with an opening formed by the method of the first embodiment, and Figure 4 is a resin core formed by the method of the first embodiment. FIG. 5 is a perspective view explaining the material forming process, FIG. 5 is a sectional view explaining the urethane foaming process in the first embodiment method, and FIG.
Cross-sectional view illustrating the opening cutting step in the example method, seventh
The figure is a sectional view illustrating the opening punching process using the method of the first embodiment, FIG. 8 is a sectional view illustrating the opening forming method of the second embodiment, and FIG. 10 is a sectional view illustrating the opening forming method of the third embodiment, and FIG. 11 is a sectional view showing the finisher attached to the opening according to the method of the third embodiment. 12 is a sectional view illustrating the opening forming method of the fourth embodiment, 131N is a sectional view showing a state in which the finisher is attached to the opening according to the fourth embodiment method, and FIG. 14 is a sectional view showing the conventional method. 15 is a cross-sectional view showing a state in which a finisher is attached to an opening according to the conventional method; FIG. 16 is a cross-sectional view explaining another example of the conventional method for forming an opening; FIG. FIG. 17 is a sectional view showing a finisher attached to an opening according to another example of the conventional method. 1... Instrument pad 2... Resin core material 3... Urethane foam layer 4... Outer skin 5... Opening 8... Slit hole (clip engagement structure) 17... Clip Engagement groove (clip engagement structure) 19...Clip engagement protrusion (clip engagement structure) 21...Clip engagement step surface (clip engagement structure) Patent application Nissan Motor Co., Ltd. Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1) In an instrument pad opening forming method for forming an opening for a finisher that is attached by clip engagement to an instrument pad consisting of a resin core material, a foamed urethane layer, and a skin, the resin core material A clip engagement structure is formed in advance in the opening part of the core material at the stage of forming the core material, and during urethane foaming, urethane is foamed between the resin core material and the skin, and after the urethane foaming, the skin and A method for forming an opening in an instrument pad, characterized in that the opening is formed by removing unnecessary parts of a foamed urethane layer and a resin core material.