JP2006116270A - Infrared welded brush, non-contact hot plate welded brush single body and manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-weight resin single brush body without bristle fall-out at a low equipment cost and its manufacturing method by using an infrared technique and a non-contact hot plate technique as a brush welding method. <P>SOLUTION: The brush is manufactured by bringing an infrared ray or a hot plate heated to about 500-1,000°C close to the side face or cross section direction of brush bristle tuft (thermoplastic resin), melting the resin by radiation heat and cooling and fixing it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an infrared welding brush, a non-contact hot plate welding brush, and a manufacturing method thereof.

Conventional brushes use metal or the like. In recent years, methods for manufacturing welding brushes that do not use metal, such as Japanese Patent Application Laid-Open No. 2002-300921 (industrial brush and manufacturing method thereof) and Japanese Patent Application Laid-Open No. 2002-85158 (roll type brush), have been introduced.

Moreover, there are many literatures, such as Unexamined-Japanese-Patent No. 2001-178544 (toothbrush) regarding a toothbrush. However, most documents are based on ultrasonic technology, and some documents do not specifically describe the welding method. The infrared welding brush and non-contact hot plate welding brush introduced here are the production methods created as a result of experiments and research.

In order to manufacture various types of brushes by welding, it is important to draw out the advantages of each welding method and use them properly depending on the application.

Problems to be solved by the inventor

There are many different types of brushes in a word. In recent years, ultrasonic welding brushes have attracted attention, but only small brushes are not suitable for manufacturing large and long brushes.

High-frequency welding is superior to ultrasonics for manufacturing large and long brushes. However, both have high equipment costs and are suitable for mass production, but there is anxiety when many types of brushes are produced on order.

Manufacture of welding brushes for a wide variety of materials and small lots, which are considered difficult in ultrasonic welding and high-frequency welding.

Means for solving the problem

We manufacture brushes of various and diverse materials by utilizing the property of passing infrared rays through a collection lens and a polysilicate heat-resistant glass, melting the brush material, and fixing it with cooling.

A hot plate heated to about 500 ° C. to 1000 ° C. is brought close to the brush material, the brush material is melted by the radiant heat, and a brush made of various and various materials is manufactured by utilizing the property of fixing with cooling.

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

The cut yarn material group 1 is attached to the yarn material group attachment jig 2. At this time, any shape of brush can be produced by changing the shape of the jig.

A polysilicate heat-resistant glass 3 excellent in heat resistance is applied to the cut yarn material group 1 mounted on the yarn material group attachment jig 2. The contact direction is a weld surface, and any direction such as a side surface or a cross-sectional direction of the cut yarn material group 1 may be used.

An infrared collection lens 4 and an infrared lamp 5 are placed at appropriate positions from the porosilicate heat-resistant glass 3. (Fig. 1 and Fig. 2)
The light emitted from the infrared lamp 5 passes through the infrared collecting lens, melts the cut yarn material group 1 (thermoplastic resin) contacting the porosilicate heat-resistant glass 3, and adheres with cooling.

In order to achieve stable welding, it is necessary to press the cut yarn material group 1 with an appropriate force using glass with high transmittance.

Next, the welding of the brush by the non-contact hot plate will be described with reference to the drawings.

The cut yarn material group 1 is attached to the yarn material group attachment jig 2. At this time, any shape of brush can be produced by changing the shape of the jig.

The hot plate 6 heated to about 500 ° C. to 1000 ° C. by the heater 7 is brought closer to the side surface or cross-sectional direction of the cut yarn material group 1 (thermoplastic resin) attached to the yarn material group attachment jig 2. (This distance varies depending on the melting point of the resin and the temperature of the hot plate 6).

By bringing the hot plate 6 close to the cutting thread material group 1, the resin is melted by the radiant heat emitted from the hot plate 6 and fixed together with cooling. (Figure 3)

Rather than natural cooling, the resin is melted by the radiant heat of the hot plate 6 and then the cooling plate 8 is pressed against the melted portion with an appropriate pressure, whereby more stable welding can be performed. (Fig. 4)

If an infrared / non-contact heat-dissipating plate is used for welding, the welding flat brush 9 (FIG. 5) and the welding cylindrical brush 10 (FIG. 6) of the resin component alone can be easily manufactured.

The invention's effect

Equipment costs are lower than ultrasonic welding and high frequency welding.

Although mass production currently has problems, on the other hand, it can be said that it is optimal for manufacturing many types and small lots of brushes.

Resins that can be welded are determined by ultrasonic welding and high-frequency welding, but infrared welding and non-contact hot plate welding are characterized by being capable of being welded by thermoplastic resins and being versatile.

From the aspect of welding strength, infrared welding and non-contact hot plate welding are superior to ultrasonic welding.

While attention is paid to environmentally friendly brushes that do not use any metal and are easy to recycle, it is important to manufacture them using a method that takes advantage of the shape and characteristics of the brushes. It is considered that the brush industry is aiming to produce brushes by making the best use of the characteristics of the above four types of manufacturing methods and to provide end users with products with a high recycling rate.

      Cutting thread group instruction       Brush infrared welding system front view       Brush non-contact hot plate welding system front view       Brush non-contact hot plate cooling front view       Welding flat brush       Welding cylindrical brush

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting thread material group 2 Thread material group attachment jig 3 Porosilicate heat-resistant glass 4 Infrared collecting lens 5 Infrared lamp (light source)
6 Heating plate 7 Heater 8 Cooling plate 9 Welding flat brush 10 Welding cylindrical brush

Claims (3)

A single brush manufactured by using infrared as a welding means, in which all materials constituting the brush are made of the same material as the material used for the brush bristle material and a resin material belonging to the same chemical structure. A single brush manufactured by using a non-contact hot plate as a welding means, in which all materials constituting the brush are made of the same material as the material used for the brush bristle material and a resin material belonging to the same chemical structure. The manufacturing method of the welding brush of Claim 1 and Claim 2.

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