JPH02144223A - Manufacture of sun visor - Google Patents

Abstract

PURPOSE:To manufacture a tough sun visor simply and cheaply by fixing a core material in abutting type mold while coating a synthetic resin foam particle compact with the core material buried therein by means of an overcoating material after filling up synthetic resin foam particles in the mold. CONSTITUTION:In manufacturing a sun visor, first, a core material 2 is placed on a cylindrically projected magnet 4 established in a cavity mold and fixed into the mold in cooperation with projections 5. Next, after making a core mold to abut the cavity mold and being clamped thereon, an appointed material is filled up in these molds. Subsequently, the appointed material is heated and cooled and a foam particle compact 1 to be the main body of a sun visor is formed. The sun visor is formed by taking out the foam particle compact 1 from the molds and then converting the same with an overcoating material such as vinyl chloride sheet, etc., and applying welding process to respective parts thereof. Accordingly thereto, together with reduction is generated burr, fixing of the core material is made to be sure and a tough sun visor is simply and cheaply manufactured.

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to a method of manufacturing a rim visor for an automobile.

[Conventional technology]

Conventionally, wooden boards, synthetic resin boards, polyurethane foam sheets, etc. have been used as visors, but wooden and synthetic resin boards are hard and have safety concerns, and polyurethane foam sheets are difficult to form. There were problems such as easy deterioration.

Therefore, in order to solve these problems, we developed styrene resin foam (Utility Model Application No. 55-153222) or polypropylene resin foam (Jitma 0: (60-53624Q)).
Four non-visors using synthetic resin foam have been proposed.

(Problems to be Solved by the Invention) Lin visors using these synthetic resin foam particle moldings have the advantage of being lightweight and having excellent safety, shape retention, and other physical properties. There were several issues to be solved regarding this. Particularly in conventional molds, there is a lot of flaking, which needs to be reduced. Also, it is difficult to firmly reset the core material made of steel wire etc. embedded in the foam molding into the mold. However, there is an urgent need for an immediate solution to the problem, which requires a lot of time and effort.

The present invention was made with the aim of solving the problems in manufacturing a non-visor (using the above-mentioned foamed synthetic resin particle molded product).

[Means to solve the problem]

For this reason, the inventors of the present invention have conducted repeated research on the manufacturing method of synthetic resin foam particle moldings, and as a result, they have changed the conventional one-piece mold to a two-butt mold, and also used magnets to fix the core material. We discovered that the above problems could be solved all at once by using
[First, the present invention was achieved by discovering that the effect can be further improved by using specific polyconytylene-based foamed particles as the resin foamed particles.

Zunawara The present invention is a method for producing a non-visor using a synthetic resin foamed particle molded article, which is characterized by using a two-piece mold, and a T-shaped magnet for fixing the core material. The main invention is the "A24 method" for a sun visor using a synthetic resin foam particle molded article.

The synthetic resin foam particle molding used in the present invention can be any synthetic resin foam particle molding, but polyolefin resin foam particle moldings are preferable, such as polyethylene, polypropylene, copolymers thereof, or their copolymers. It is a foamed particle molded product such as a mixture. Compared to other foamed resin particle molded products, these polyolefin-based resin foam particle molded products have the four required performances for non-visors: cushioning performance (flexibility and recovery properties), repeated impact absorption properties,
This is because it has excellent heat resistance.

Among these, particularly preferred is a polyethylene resin expanded particle molded product. This is because the polyethylene resin foam particle molded product satisfies the above-mentioned required performance and has better moldability, has good cosmetic properties, and is economical compared to other polyolefin resin foam particles.

Most preferably, the density is 0.925 to 0.940'ii as described in Japanese Patent Publication No. 11975/1983.
/ cm of polyethylene resin particles are cross-linked, and then the particles are impregnated with a foaming agent. After the foaming agent on the surface of the particles is volatilized preferentially, the overall foaming treatment is performed to remove the internal cell structure. The foamed particles are formed to cover the skin with a thickness that is about three times or more larger than the thickness of the foamed particles, and then the foamed particles are filled into a modified version of the cardiac capacitance imparting treatment and heated to absorb the foamed particles, thereby reducing the bond between the foamed particles. The molded body was further heated at 60°C or higher [
A polyethylene foam molded product having substantially no interparticle gaps on its surface obtained by aging treatment with hot stone for at least 6 hours, specifically Asahi Kasei Kogyo () Wooden Metsu (σ registered trademark)
This is a foam molded product using. Because the surface layer of the particles is thick, the fusion between the particles is very strong, and there is almost no spacing, so compared to other polyethylene resin foam particle moldings, it meets the above required performance. Moreover, it has excellent moldability, has good cosmetic properties, is resistant to cracking, and is strong and durable.

Next, a method for manufacturing the 4-non-visor of the present invention will be explained.

First, the mold is not a normal V-type mold, but a patch mold in which a core mold and a cavity mold are held together in a clasp shape, as shown in Figure 2. .

In addition to problems with the processing and strength of aluminum molds, which are mainly used for this type of mold, the 01-type mold also has the disadvantage that beads get into the mating area, which increases the occurrence of flash.

Next, as shown in FIG. 1, magnets 4 and protrusions 5 are used to fix a core material made by bending a metal wire, for example, a copper-plated wire 2, at one to several locations in the mold. is provided, and after the metal core material is fixed with the magnet and the protrusion, the mold is clamped. This is filled with a predetermined amount of raw material PE particles,
Heat and foam. Then, after cooling it,
Listen to the mold and take out the molded 4 non-visor body 1.

After that, this is covered with a facing material 3 and finished.

(d3) As the covering material, vinyl chloride, sheet, cloth, or a VJ layer thereof is used.

The core material fixing magnet can be either a permanent magnet or an electromagnet.

The magnets and/or protrusions may be installed in a core type, a cavity type, or both.

The foamed molded product has four parts where the magnet was and other protrusions for fixing the core material, but if it is necessary to eliminate or reduce these parts, connect the phosphor visor to the main shaft to attach it to the car body. Attachment part 8 and/or cutout part 7 where the core material is exposed in the foamed particle molded product, in other words, to the mold and/or mold removal plate from which the synthetic resin foamed particle filling part is removed,
By installing a magnet and fixing the core material, it is possible to prevent the formation of the recess. In this case, in order to securely fix the core material, one or more fixing magnets and/or protrusions may be installed at the bottom.

J3, mounting on the car (=J part 8 can be set in a mold and molded while being integrally connected to main shaft part 6,
In order to increase the number of molds, draw the mold into the cylinder, and simplify the work and finish processing, a metal rod such as an iron rod is inserted into the main shaft as an alternative, and this metal rod is used. A preferable method is to fix it with a magnet, mold it, and then replace it with the C-shaped part 8.

In addition, by making the mold a horizontal mold in which the two-part mold moves on a plate, it is also possible to obtain a foamed particle molded product without a magnetic core support device and, therefore, without a recess for the groove.

〔Example〕

Example 1 A steel-plated cable with a diameter of 3 mm was bent to form 2 in Figure 1.
A core material having a substantially parallelogram shape with a long side of 4 occm and a short side of 13c/71 is manufactured. This core material 2 is placed on a cylindrical projection-shaped magnet 4 of 1 cm diameter installed in the cavity mold Bg as shown in FIG. 1, and is fixed in the mold together with the projection 5. Next, the core mold is placed against the cavity mold as shown in FIG. 2, and after the mold is clamped, the mold is filled with polyethylene foam particles (Asahi Kasei Kogyo Co., Ltd. (1F, 30 times product)).

Next, the body is heated and fused with water vapor at a shoulder pressure of 1.2 to 2.0 KFJ/c for 20 to 30 seconds, then cooled to room temperature with cold water at about 20°C to cover the purpose. A foamed particle molded body 1 is molded.

The foamed particle molded product 1 is taken out of the mold and subjected to aging, and then covered with a vinyl chloride sheet 3 and fused together with a welder to obtain the desired phosphor visor.

The phosphor visor of the present invention has extremely good moldability and toughness because the polyethylene foam particle molded product used is
Even after using it for a long time, it did not sag or sag at all. The relationship between father and son was also very good.

One of the features of the present invention's Rinpai quantity arm is that by changing the shape of the mold, it can be freely shaped to suit the person L1 in each automobile, making it easier to install in automobiles than conventional products. It is easy to put on and fits perfectly.

(Effects of the Invention) Compared to the conventional method, the production method of the present invention reduces the occurrence of paris, makes it easier to fix the core H, and makes it possible to manufacture phosphor visors much more efficiently and economically. The effect is huge.

In addition, the Rimbai lower of the present invention has a feature that when a specific polyethylene resin foamed particle molded product is used, it has good moldability, so it can be easily and freely molded into a shape that fits the top of an automobile. It can be used for a long time without sagging or sagging (it is strong, firm to the touch, has a good appearance, and has the advantage of being easy to handle.

[Brief explanation of the drawing]

FIG. 1 is a front view of the center of a Cahity mold showing a state in which the core material is fixed, showing one embodiment of the present invention, and FIG. 2 is a front view showing the state in which the mold is set. FIG. 1...Polyethylene foam particle molded product. 2...1 Core material made of blank wire, 3... Covering material made of PVC sheet. 4...Magnet i+ for fixing the core material 5...Protrusion for fixing the core material.

Claims (1)

[Claims] 1. After fixing the core material in a butt-type mold, filling and molding the synthetic resin foam particles, and then forming a synthetic resin foam particle molded body in which the obtained core material is embedded. A method for manufacturing a sun visor, characterized by covering it with a covering material. 2. After fixing the core material in the mold using a magnet, it is filled with synthetic resin foam particles and molded, and then the resulting synthetic resin foam particle molded body with the core material embedded is covered with a covering material. A method for manufacturing a sun visor, characterized by: 3. The method for manufacturing a sun visor according to claim 2, wherein the magnet for fixing the core material is provided in a portion filled with foamed resin particles in the mold. 4. Manufacture of the sun visor according to claim 2, characterized in that the magnet for fixing the core material is installed in the attachment part outside the resin foam particle filling part in the mold and/or in the exposed cutout part of the core material. Method. 5. The method of manufacturing a sun visor using a synthetic resin foam particle molded article according to claim 4, further comprising inserting a metal rod into the main shaft portion and fixing the metal rod using a magnet. 6. After fixing the core material in a horizontal mold, filling it with synthetic resin foam particles, and then encapsulating the synthetic resin foam particle molded body with the core material embedded in it with a covering material. A method for manufacturing a sun visor characterized by: