JPS63144016A - Manufacture of dash silencer - Google Patents

Abstract

PURPOSE:To improve a sound insulating property through preventing the sound to be heard outside by a method in which a hole part is provided on a skin member, and after an inserting part has been fitted thereinto, the skin member is set in the mold for molding a pad member and successively, foaming resin liquid to be made into the pad member, is poured into the protrusion side of the interting parts and is foam-treated. CONSTITUTION:A hole part 6 is drilled on a skin member 2. Next, after a spacer 4 has-been fitted to the skin member 2 so as to project through the hole part 6 over the face, it is set on the bottom force 5a of the mold 5 for molding a pad member. Foaming urethane resin is poured into the protrusion side of the spacer 4 of the skin member 2, and at the state where at top force 5 is closed or opened, the resin is expanded by foaming treatment, thereby molding the pad member 3 of polyurethane foam. Consequently, the pad member 3 and the spacer 4 are made into an integral structure without any clearance therebetween. Even if the clearance is in between the skin member 2 and the spacer 4, sound conditioning property is remarkably improved, since the clearance is filled with the polyurethane foam.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a dash silencer, and more specifically, the present invention relates to a method for manufacturing a dash silencer, and more specifically, by integrating a silencer main body and a silencer insertion part such as a clip or a spacer, the gap between the two is reduced. The present invention relates to a method of manufacturing a dash silencer that can significantly improve sound insulation performance by eliminating the noise.

[Conventional technology]

Conventionally, a dash silencer has been attached to the interior side of the dash panel in order to prevent engine vibrations and noise from the engine room of an automobile from being transmitted to the interior of the vehicle. This dash silencer is mainly composed of a combination of a pad material, which is a sound-absorbing material that reduces the sound volume level, and a skin material, which is a sound-insulating material that plays the role of blocking and repelling sound from entering. , perforations for attaching various parts to the dash silencer, and
Silencer fitting parts such as clips and spacers are provided as a medium for attaching the silencer and various members to the dash panel. (For example, see Utility Model Application Publication No. 58-179249.) [Problems to be Solved by the Invention] By the way, when attaching a fitting part such as a clip spacer to the dash silencer, conventionally, a perforation part is provided in the dash silencer. , the fitting part is attached to the hole.

For this reason, the hole in the silencer must be made with a diameter that is approximately the same as or larger than that of the fitting part, and a gap is created between the silencer and the fitting part, and sound leaks from this gap. There is a problem. In addition, when providing perforations in the skin material, the skin material is sometimes molded along the dash panel surface so as to wrap around the pad material, but in this case, there is a gap between the skin material and the mounting member. In addition to the generation of gaps, there is a problem that the thickness of the silencer at the member attachment part cannot be ensured. Incidentally, Figures 3 and 4
The figures show the state of the conventional dash silencer at the air conditioner mount tightening part and the accelerator rod tightening part, respectively, but in the case of Fig. 3, the dash silencer 1
There is a problem that a gap occurs between the skin material 102 and the pad 103 that make up the dash silencer 101 and the spacer 104, and sound leaks from this gap. In addition to the fact that a gap is likely to occur between the mounting member 102 and the mounting member 107,
There is a problem in that the thickness of the pad 103 cannot be ensured at the member attachment portion, and the sound insulation performance is significantly reduced.

The present invention has been made to eliminate such conventional problems, and its purpose is to prevent sound leakage by eliminating the gap between the silencer body and the silencer insertion parts such as clips and spacers, and furthermore, to To provide a method for manufacturing a dash silencer which can ensure the thickness of the main body and significantly improve the interrupting performance.

[Means for solving problems]

In order to achieve the above object, the present invention provides the following features in manufacturing a dash silencer equipped with a skin material and a pad material.
A perforation is provided in the skin material to which a silencer fitting part such as a clip or a spacer is attached, and then the fitting part is attached to the skin material so as to protrude all over the surface through the perforation part, and then placed in a pad material mold. The structure is such that a foaming resin liquid, which becomes a padding material, is injected into the skin material on the side of the skin material from which the fitting part protrudes, and then foaming is performed.

[Effect]

With such a configuration, the fitting part attached through the perforation of the skin material is integrated with the pad material at the same time as the pad material is molded. Therefore, since there is no gap between the pad material and the insertion part, sound leakage from the gap is prevented, and the thickness of the pad material is ensured at the attachment part of each component by the insertion part, improving sound insulation performance. Significantly improved.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Figure 1 shows a state in which a dash silencer is manufactured by implementing the present invention. In particular, in Figure 6, which shows a molding state suitable for application to an air conditioner mount tightening part, 1 indicates a dash silencer. 1 skin material 2 and pad material 3
It is equipped with 2 is a skin material having sound insulation properties, which is made of a vinyl chloride resin sheet or the like. 3 is a pad material having sound absorbing properties, and is made of polyurethane foam or the like. 4
is a silencer insertion part, which in this embodiment is a spacer. Reference numeral 5 denotes a pad material molding die, which is composed of a lower die 5a and an upper die 5b.

To carry out the present invention to manufacture a dash silencer,
First, a perforation 6 with a diameter to which a spacer 4, which is a silencer insertion part, is attached is bored in the skin material 2.Next, the spacer 4 is attached to the skin material 2 so as to protrude all over the surface through this perforation 6. , the skin material 2 to which the spacer 4 is attached
is set on the lower mold 5a of the pad material mold 5. Then, a foamable urethane resin liquid is injected into the side of the skin material 2 from which the spacer 4 protrudes, and the upper mold 5b is foamed and expanded with the upper mold 5b closed or opened, thereby forming the polyurethane foam padding material 3.
form.

In this way, in this embodiment, the spacer 4 is attached to the skin material 2 so as to protrude all over the surface through the perforated portion 6, and then foamable urethane resin liquid is injected into the surface material 2 on the side where the spacer 4 protrudes. Since it was made to expand, pad material 3
and the spacer 4 are integrated with no gaps at all.

There is a gap between the skin material 2 and the spacer 4.

This gap is also filled with polyurethane foam, greatly improving sound insulation performance.

Moreover, FIG. 2 shows a molded state of a dash silencer suitable for application to an accelerator rod tightening part, in which two spacers 4, 4 are arranged at the attachment part of the member 7, and these spacers 4, 4 is similar to the embodiment shown in FIG. 1,
It is integrated with the pad material 3. Therefore, according to this embodiment, since there is no gap between the pad material 3 and the spacers 4, 4, sound leakage from the gap is prevented. Even in this case, the thickness of the pad material 3 can be ensured, and the sound insulation performance is significantly improved.

In the above embodiment, a spacer is used as the silencer insertion part, but in addition to this, a resin clip or the like that engages with a clamp fitting fixed to the dash panel may also be used. - [Effects of the Invention] According to the present invention, after a silencer inserting part such as a clip or a spacer is attached so as to protrude all over the surface through the perforation of the skin material, a pad material is attached to the side of the skin material from which the inserting part protrudes. Since the foaming process is carried out by injecting the foamable resin liquid, the pad material and the insertion part can be integrated. Therefore, since there is no gap between the pad material and the fitting part, sound leakage from the gap is prevented, and since the fitting part is arranged, the thickness of the pad material can be adjusted even at the mounting part of each component. sound insulation performance can be significantly improved.

[Brief explanation of the drawing]

1 and 2 show embodiments of the present invention.
The figure is a partially longitudinal side view showing the molded state of a dash silencer suitable for application to the air conditioner mount tightening part, and Figure 2 is a longitudinal side view showing the molded state of the dash silencer suitable for application to the accelerator rod tightening part. 3 and 4 are longitudinal sectional side views showing a conventional example corresponding to FIGS. 1 and 2, respectively. 1... Dash silencer, 2... Skin material, 3...
...Padding material. 4... Silencer insertion part, 5... Pad material mold, 6... Perforation part.

Claims (1)

[Claims] (1) When manufacturing a dash silencer equipped with a skin material and a pad material, a perforation is provided in the skin material to which a silencer fitting part such as a clip or a spacer is attached, and then the fitting part is passed through the perforation part and covered with one surface. After attaching it to the skin material so that it protrudes, it is set in a pad material mold, and then foaming treatment is performed by injecting a foaming resin liquid that will become the pad material onto the side of the skin material from which the inserted part protrudes. A manufacturing method for a distinctive dash silencer.