JPH11300630A - Buff material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the temperature rise of a coated face at the time of finishing the coated face with buff material so as to improve polishing efficiency and to prevent degradation. SOLUTION: Raw material 3a of soft urethane foam for surface material is cut out in specified thickness and heat-pressed by a molding die 4 of rugged shape and a press-heating plate 5 to form pressed material 3p for surface material of 2-5 mm in thickness. Grated grooves (m) of 1 mm in groove width and protruding parts (t) of 60-300 kg/m<3> in density are formed on the surface of the pressed material 3p for surface material. This pressed material 3p is cut to form surface material 3, and the surface material 3 is bonded to base material 2 of soft urethane foam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buff material used, for example, in finishing a painting process.

[0002]

2. Description of the Related Art Conventionally, as a buff material for holding a free abrasive such as abrasive grains and polishing a polished surface in a polishing process or a finishing process of coating, for example, as shown in FIG. Buffing material 51a of urethane foam alone, FIG.
Buff material 51 in which polyester cotton surface material 53 is adhered to the surface of urethane foam base material 52 as shown in FIG.
b etc. are known.

[0003]

However, when the buff materials 51a and 51b are brought into sliding contact with the polished surface while rotating at a high speed, the temperature of the polished surface rises to, for example, 100 ° C. or more, and the coating material is coated. In the case of finishing and the like, there is a problem that the painted surface is discolored and the buff material is easily deteriorated.

Accordingly, an object of the present invention is to prevent the temperature of the polished surface from increasing during polishing, prevent the buff material from deteriorating at an early stage, and increase the polishing efficiency.

[0005]

According to the present invention, there is provided a buff material having a surface material fixed to a surface of a base material, wherein the surface material is formed by hot pressing a soft urethane foam. A plurality of independent protrusions compressed at a predetermined density and a predetermined thickness and a continuous groove surrounding the protrusions were formed on the entire front side by molding.

[0006] As described above, the convex portion and the groove are formed by hot press molding, and the convex portion is slid on the polishing surface for polishing.
By providing an independent convex portion and a continuous groove surrounding the convex portion, the entire air permeability can be improved, and a temperature rise can be prevented. Here, the term “continuous groove” means a groove that is not closed inside but opens at least at one end side to the outside. In addition, by providing the groove, the polishing scum collects in the groove, and the effect of the abrasive can be prolonged. Furthermore, if the density of the convex portions is increased by hot press molding, the polishing efficiency can be increased without damaging the painted surface, and deterioration is less likely.

According to a second aspect of the present invention, the thickness of the convex portion of the surface material is 2 to 5 mm, the density of the convex portion is 60 to 300 kg / m ^3, and the width of the groove and the depth of the groove are 1 to 5, respectively. 3 mm. When compressed to such a thickness and density, polishing efficiency,
It is effective from the viewpoint of preventing deterioration, and the width and depth of such a groove are effective from the viewpoint of preventing temperature rise, holding the abrasive, and the like. If the flexible urethane foam used in the present invention is a commonly used flexible urethane foam,
Any material can be used and may be appropriately selected depending on the application and the degree of hot pressing. Therefore, a polyether-based soft urethane foam or a polyester-based soft urethane foam may be used. However, in terms of thermoformability, abrasion, and chemical resistance, polyesters are generally superior to polyethers and are preferred. However, polyesters may be inferior to polyethers in terms of alkali resistance and the like.

In order to further improve the effect of preventing a rise in temperature, a film-free flexible urethane foam from which a cell film has been removed may be used. Here, ordinary flexible urethane foam also has air permeability, but since the membrane-free soft urethane foam has a cell membrane removed, the air permeability is further improved than ordinary soft urethane foam, and the foam is formed by hot pressing. Even if the density is increased, it is excellent in heat dissipation because of excellent air permeability, and it is preferable to use the buff material of the present invention.

[0009]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a process diagram for explaining a buff material manufacturing process according to the present invention, and FIG. 2 is a perspective view showing an example of a buff polishing tool.

[0010] The buff material according to the present invention is, for example, a drawback of a conventional buff material of a single urethane foam used in a paint finishing process or a buff material in which polyester cotton is laminated on the surface of a urethane foam, that is, a rise in temperature at the time of paint finish. The purpose is to improve the disadvantages such as discoloration of the painted surface, which is likely to cause discoloration, and the deterioration of the buff material, which prevents the temperature rise during buffing and improves the polishing efficiency. To improve the quality.

For this reason, according to the present invention, as shown in FIG. 1 (D), in a buff material 1 in which a surface material 3 is laminated on a surface of a base material 2 of, for example, a soft urethane foam, particularly, a sliding contact surface at the time of buffing. The above-mentioned object is achieved by giving characteristics to the surface material 3 to be formed.

That is, as shown in FIG. 1 (A), as a surface material 3a, for example, a soft urethane foam having a density of 15 to 40 kg / m ³ is cut out to a thickness of 10 to 40 mm, and is prepared. Mold 4 made of aluminum etc.
And hot press forming with a press hot plate 5.

Here, the concave and convex shape of the molding die 4 is, for example, a rectangular concave portion having a side length of 5 to 15 mm and a depth of 1 to 3 mm.
mm, and the width of the grid-like projections surrounding the concave portion is set to 1 to 3 mm. The mold 4 is set on the hot plate 5 and heated to a temperature of about 150 to 210 ° C.

Then, the prepared surface material 3a is molded
Pressing while heating with a press hot plate 5, the thickness of the convex portion is 2 to 5 mm, and the density of the convex portion after compression is 60 to 300 kg.
1 / m ³ , as shown in FIG. 1 (B), a surface material pressed material 3p having a concave-convex surface with the concave-convex shape of the molding die 4 inverted on the surface side is molded.

Incidentally, in the embodiment, the density of the surface material 3a of the initial flexible urethane foam shown in FIG. 1A is set to 20 kg / m ³ , and the cut-out thickness is set to 30 mm.
The shape of the recess of the mold 4 is a square of 15 × 15 mm and a depth of 2
mm and the width of the projection is 1 mm. Then, the surface material 3a was pressed by a press hot plate 5 and a forming die 4, and hot press forming was performed at 180 ° C. for 1 minute.
The total thickness of the surface material pressed material 3p shown in (B) is 4 mm.
Thus, the protrusions t were formed at a density of 150 kg / m ³ .

The irregular shape of the surface material pressing material 3p at this time is a shape obtained by inverting the irregular shape of the molding die 4, that is, the shape of the convex portion t is a square of 15 × 15 mm, and a lattice shape surrounding the square. The width of the groove m was 1 mm and the depth of the groove m was 2 mm.

The surface material pressing material 3p is shown in FIG.
As shown in FIG. 1 (C), the surface material 3 is cut into a circular shape in accordance with the surface shape of the base material 2, and as shown in FIG.
It is adhered to the surface of the flexible urethane foam substrate 2 with an adhesive or an adhesive tape.

The buff material 1 configured as described above is applied to, for example, a buff polishing tool 6 having a drive motor as shown in FIG. By doing so, the painted surface is finished, but the air permeability is improved by the groove m of the surface continuity, and the discoloration or the like of the painted surface due to the temperature rise is suppressed. In addition, since the polishing residue enters into the groove m, the effect of the free abrasive can be prolonged.

Furthermore, since the convex portion t of the surface material 3 has a high density of soft urethane foam, the polishing efficiency can be increased without damaging the painted surface, and in addition to the above-mentioned action of suppressing the temperature rise. , The deterioration of the convex portion t can be prevented.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, groove m
Is not limited to a lattice shape, and the shape of the convex portion t is also arbitrary. It is also possible to use the buff material 1 for purposes other than the finishing of the coating.

[0021]

As described above, the buff material according to the present invention is formed by hot press molding a soft urethane foam as the surface material fixed to the surface of the base material. An independent convex portion compressed at a predetermined density on the side,
Since the continuous groove surrounding the convex portion is provided, the air permeability of the whole is improved and the temperature rise can be prevented. In addition, polishing scum collects in the grooves, and the effect of the abrasive can be prolonged. Furthermore, since the density of the projections is increased by hot press molding, the polishing efficiency can be increased without damaging the painted surface. And, by using specific specifications as in claim 2, suppression of temperature rise, polishing efficiency,
It is possible to effectively prevent deterioration and the like.

[Brief description of the drawings]

FIG. 1 is a process diagram illustrating a process for manufacturing a buff material according to the present invention.

FIG. 2 is a perspective view showing an example of a buffing tool.

FIG. 3 is a conventional view of a buffing material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Buff material, 2 ... Base material, 3 ... Surface material, t ... Convex part, m ...
groove.

Claims (2)

[Claims] 1. A buff material having a surface material fixed to a surface of a base material, wherein the surface material is formed by hot press molding of a soft urethane foam, and has a predetermined thickness and a predetermined thickness over the entire front surface. A buffing material comprising: a plurality of independent projections compressed into a plurality of grooves; and a continuous groove surrounding the projections. 2. The buff material according to claim 1, wherein the thickness of the convex portion of the surface material is 2 to 5 mm, and the density of the convex portion is 6 mm.
A buffing material characterized by having a groove width of 0 to 300 kg / m ³ and a groove depth of 1 to 3 mm.