초록 ▼

The molding machine of the present invention comprises a screw extruder for extruding plastic material. A plurality of molds are moved one at a time to the outlet end of the extruder for receiving the plastic material therefrom. One end of the mold is open for receiving the plastic material and the

The molding machine of the present invention comprises a screw extruder for extruding plastic material. A plurality of molds are moved one at a time to the outlet end of the extruder for receiving the plastic material therefrom. One end of the mold is open for receiving the plastic material and the opposite end of the mold includes a closure plate covering the end of the mold. The closure plate has a small fill sensing aperture therein. A sensing switch is mounted adjacent the fill sensing aperture and is adapted to sense when molded plastic exits from the fill sensing aperture so as to shut off the extruder and cause the mold to move away from the extruder so that an additional mold can be filled. A cylinder operated closure device clamps the opposite ends of the mold after the mold has moved away from the filling station so as to contain the plastic material within the mold while the plastic material cools and hardens. A trimming knife trims the ends of the mold as it is moving from its fill station to the clamping station.

대표청구항 ▼

A molding machine for forming articles from a plastic material comprising: a support frame, a screw extruder on said frame and having an inlet and an outlet; means for introducing into said screw extruder a quantity of plastic material to be extruded, said screw extruder being operable to heat and m

A molding machine for forming articles from a plastic material comprising: a support frame, a screw extruder on said frame and having an inlet and an outlet; means for introducing into said screw extruder a quantity of plastic material to be extruded, said screw extruder being operable to heat and mix said plastic material and to force said plastic material outwardly through said outlet in a fluid condition; a plurality of molds, each of said molds having a first open end and a second end, a closure plate being secured in covering relation over said second end so as to substantially close said second end, said closure plate having a fill sensing aperture therein; a mold holding frame adapted to retentively hold said plurality of molds, mold mounting means movably mounting said mold holding frame to said support frame for movement of each of said molds one at a time to a fill station wherein said first end of said model is in a position to receive said fluid plastic material exiting from said outlet of said screw extruder; power means for causing movement of said mold mounting means; fill sensing means mounted on said support frame for covering said fill sensing apertures of said closure plates of said molds when said molds are in said fill position, said fill sensing means being adapted to sense when said fluid plastic material commences issuing from said fill sensing aperture; switch means connected to said fill sensing means, and said extruder for causing deactuation of said extruder in response to said fill sensing means sensing said fluid plastic material issuing from said fill sensing aperture.