摘要:
Apparatus for extruding plastic material comprising an extruder having a passaged junction box disposed adjacent an extrusion die is disclosed. The junction box incorporates a flexible junction plate which is positioned at the junction where diverse thermoplastic resinous streams of material merge or marry into a common laminar flow path. The flexible junction plate automatically adjusts its position in the common flow path of the diverse streams in response to the differential in the rates at which the diverse thermoplastic materials are fed through the common flow path to the extrusion die. By virtue thereof the junction where the diverse materials marry preliminary to coextrusion to form a composite sheet or laminate is smooth and linear. This promotes uniformity of relative thickness of the individual layers or laminae throughout the composite sheet. Moreover, since the adjustment of the junction plate is automatic as a function of the rate at which the several thermoplastic materials are delivered into the common flow path, there is no need to disassemble the extrusion apparatus to reset the junction plate when the rate at which the respective diverse thermoplastic streams are altered.
摘要:
A power-operated extrusion press for extruding a mass capable of abruptly releasing a large volume of gas in which the mass is placed in a pressure pot and held in pressure engagement with a sealing surface on the die and pressed out of the pot through the die, is protected against damage due to such abrupt release of gas by providing in the path of pressure as generated by gas release a pressure surface dimensioned so that:
摘要:
A decorative synthetic resin sheet having formed on its surface, a three-dimensional multi-colored pattern including protuberances and depressions distinctly defined with a marked difference in elevation therebetween. The sheet has a smooth planar rear surface which ensures good adhesion to the desired surface. The sheet is made by a process comprising a first step of coating one surface of a thin base sheet of paper or like material with a main synthetic resin composition containing a blowing agent, drying the resulting coating layer by heating and thereafter delustering the surface of the coating layer with a suitable solvent; a second step of fully foaming the coating layer by heating, then by reheating only a surface of the foamed layer, after cooling and stabilizing the foamed layer, while leaving the unheated portion of said layer remote from said surface; a third step of hot-embossing the reheated foamed layer and cooling the embossed surface; and a fourth step of applying a synthetic resin composition containing a coloring agent only to the raised top surface of the resulting embossed pattern and cooling the sheet.
摘要:
A process for producing a thermoplastic resin sheet having a band of color by feeding a molten thermoplastic resin by an extruder into a sheet-forming flat die having a manifold and extruding said molten resin from an extrusion opening of said flat die, which comprises forcing a stream of a colored molten thermoplastic resin through at least one injection port opened into the manifold of the flat die into a main stream of the molten resin extruded from the extruder and fed to the manifold, associating the main stream of the molten thermoplastic resin and the stream of the colored molten thermoplastic resin within the manifold, and extruding the associated streams from the extrusion opening of said flat die.
摘要:
A beaded article having a support layer on which a bottom layer and a top layer of sheet material are superimposed. The top layer is heat bonded to the bottom layer and both are heat bonded to the support layer along a circumferentially complete narrow annular zone. In the area circumscribed by the annular zone the top layer is provided with a raised self-supporting bead-like prominence which contains ornamental particles visible to a viewer because the top layer is of transparent material.
摘要:
A planar mold plate having an embossing surface comprising a raised negative image is used for decorating a candle. The mold plate has a plurality of drain passages therethrough to conduct away wax melted from the candle side wall. A hot plate supports and heats the mold plate to candle wax melting temperature so that a candle rolled across the embossing surface receives a decorative image on its side wall.
摘要:
A method for making a dimensionally stable decorative floor covering product. A sheet is first formed, and this is then provided with a decorative design. A clear wear layer is applied thereon, mechanically embossed-in-register, and then the sheet is cut into a plurality of individual tile units.