Resources Contact Us Home
Resin multilayer molding method and multilayer molding device

Image Number 10 for United States Patent #7018190.

A resin multilayer molding method in which a skin material having a resin decorating layer on a surface and a core-material resin are integrally molded in a mold, comprising the steps of: presetting a relationship of a glass transition point (Tgs) of the resin decorating layer of the skin material and a supply temperature (Tc) of a molten resin forming a core material to satisfy Tgs<Tc, and performing molding on a condition that a maximum temperature (Tsm) of the resin decorating layer of the skin material during clamping satisfies Tsm>Tgs. When a temperature of the resin decorating layer of the skin material reaches a previously estimated and set value (Tsd) so that a temperature Tsc, which temperature of the resin decorating layer reaches by rising again after an air insulating layer is formed, satisfies Tsc.gtoreq.Tgs on the basis of a correlation between a temperature of the core-material resin during clamping and forming and retaining the air insulating layer and a temperature of the skin material decorating layer, the gap is made between the resin decorating layer of the skin material and the mold cavity surface opposed to the resin decorating layer to form and retain the air insulating layer. By this, remarkably high-quality resin multilayer molded products can be stably supplied at low cost without impairing surface decorating performance.

  Recently Added Patents
Controller interface providing improved data reliability
Method and device for evaluating evolution of tumoural lesions
Discharge lamp lighting circuit
System and method for browsing tabbed-heterogeneous windows
Local call local switching at handover
Pressure roller and fixing device equipped with the same
Reliable and accurate usage detection of a software application
  Randomly Featured Patents
Method and apparatus for personal verification utilizing nonpredictable codes and biocharacteristics
Method of oriented feeding of nonmagnetic current-conducting components and devices for effecting same
Magnetostrictive record head
External interface for a high performance graphics adapter allowing for graphics compatibility
Retractable braking device for snowboards
Use of cationically modified, particle-shaped, hydrophobic polymers as addition agents in textile rinsing or care products and as addition agents in detergents
Composite racquet structure
Power module
Video disc system having true and complemented digital auxiliary information codes
Shift-assisting device for a transmission