초록 ▼

A fiber web reinforced plastic is formed by applying dry resin powder to opposite sides of a vertically moving web, and then melting and pressing the power into the web. The dry powder is applied to the web by being thrown thereagainst. The powder thus more effectively occupies the voids in the web

A fiber web reinforced plastic is formed by applying dry resin powder to opposite sides of a vertically moving web, and then melting and pressing the power into the web. The dry powder is applied to the web by being thrown thereagainst. The powder thus more effectively occupies the voids in the web to minimize the presence of air in the web. The thrown-on powder can be melted before the laminating pressure is applied.

대표청구항 ▼

Apparatus for producing fiber web-reinforced plastic comprising: means for advancing a fibrous web generally vertically, and a pair of powder-throwing means comprising mutually opposed first rolls rotatable about parallel axes, disposed on opposite sides of the generally vertically advancing web, ea

Apparatus for producing fiber web-reinforced plastic comprising: means for advancing a fibrous web generally vertically, and a pair of powder-throwing means comprising mutually opposed first rolls rotatable about parallel axes, disposed on opposite sides of the generally vertically advancing web, each of said first rolls comprising: a powder-throwing surface movable in a first direction in converging relationship with a respective side of said web, and then in a second direction in non-converging relationship with said respective web side, a width of said surface approximately corresponding to a web width, powder depositing means arranged above said surface for loosely depositing plastic powder onto said surface as said surface travels beneath said depositing means, so that plastic powder is loosely carried on said surface, and drive means for moving said surface and plastic powder loosely carried thereby in said first direction such that said loosely carried powder is thrown against said respective web side as said surface changes from said first to said second direction, said thrown powder entering said respective web side, an additional pair of rollers spaced vertically below said first rolls and disposed on opposite sides of said web downstream of said first rolls, heating means disposed between said first rolls and said additional rolls for heating said web and plastic powder contained therein, means disposed downstream of said heating means for urging said web and powder together under an influence of heat and pressure, and means disposed between said first rolls and said additional rolls of guiding said web in a zigzag direction of travel.