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PLASTICS

It is widely known that mono filament and film, if drawn whilst being heated again after original formation, will possess greater thensile strength for drawing. This is also supported by theory, and the technology concerned has greatly improved. Drawing technology at the first stage was concerned only with the improvement of tensile strength and general toughness. This resulted in distortion inside the product, causing the stability of the dimensions or the strength to deteriorate as time elapsed or as the temperature changed. The thermal processing to eliminate such distortion is annealing. It can be said that drawing technology has finally been perfected, by incorporating annealing technology. On the other hand, tensile strength at right angles to drawing deteriorates after drawing and the product in question tears more easily. This phenomenon is taken advantage of in flat yarn or binding tape. However, for film or sheet, which require the longitudinal and lateral strengths to be equal, drawing in both directions is conducted. This is called biaxial drawing. "Yamaguchi's drawing technology" has dealt with all the above-mentioned drawing technologies in its long career, and has produced abundant results, which have been evaluated at high levels, and have been well-received. For example, our labyrinth-method steam drawing bath demonstrates the highest level of one-way drawing. It is indispensible in manufacturing line for mono filament or packing band. In the manufacture of heat-shrinkable films or biaxially drawn film, our unique tubular film biaxial drawing method plays an important part. Furthermore, our special drawing technology preventing the width shrinking has been put to practical use. We now intend to apply our various drawing and annealing technologies to manufacture a variety of plastic products to help improve the quality of the products.

SOLDERS

When melted alloy solidifies, the phenomenon of segregation, whereby the solid alloy's composition is not uniform, is apt to occur. This occurs because the part solidifying first and the part solidifying later differ in composition due to different cooling times from liquid to solid, and specific gravities of the component metals. In the hot extrusion method, where melted alloy is poured directly into the cylinder of the extruder, thus making rapid cooling impossible, segregation occurs easily. The method is thus not suitable for the manufacture of high-quality solder. The cool extrusion method has been designed to preclude the phenomenon. First, melted alloy is cast into the mold, then cooled rapidly. Thus billets with little segregation are formed. Oxide which occurs on the surface during casting, is removed with a special shaving press. The use of the billets has improved the quality of solder remarkably. Productivity has been further enhanced with the automization of the machine. However, the production of the superior quality billets has been accompanied by an increase in cost due to a rise in equipment costs and the complication of the process by additions such as the treatment of the oxide coating. The continuous billet casting method was next devised. Melted alloy is continuously cast into the mold, and solid billets are continuously removed. This method produces a superior surface and reduces the casting costs considerably, as the process of eliminating surface oxide is rendered unnecessary and only marginal segregation is produced. As described above, the core of "Yamaguchi's solder manufacturing technology" is the continuous casting machine and the cold extruder. We are now endeavouring to further improve the quality of the solder products and to rationalize production .

  1. Extruder
  2. Doun-word Blowing Tubular Film Manufacturing Equipment
  3. Polypropylene Tubular Film Manufacturing Equipment
  4. Tubular Bioxially Oriented Polypropylene Film Manufacturing Equipment
  5. Polyethylene Tubular film Manufacturing Equipment
  6. Almighty Tubular Film Manufacturing Equipment
  7. Laminator Equipment
  8. Flat Yarn Manufacturing Equipment
  9. Monofilament Manufacturing Equipment
  10. T-Die Flat Film Manufacturing Equipment
  11. PVC Pipe and Hose Manufacturing Equipment
  12. PP Band and Tape Manufacturing Equipment
  13. Designing and manufacturing of various processing equipment
  1. Flux-cored Wire Solder Manufacturing Line
    (Full-automatic cold extrusion system)
  2. Continuous Billet Casting Machine
  3. Cold Extruder
  4. Hot Extruder
  5. Wire Drawing Machine
  6. Winder
  7. Automatic Bar Solder Cutter
  8. Automatic Bar Solder Casting Machine
  9. Automatic lngot Casting MaChine
  10. Automatic Ball Solder Casting Machine
  11. Solder Melting Furnace
  12. Solder Pump
  13. All Other Related Machines