초록 ▼

A diverter valve controlling input of two different extruded materials has a valve body having an axially extending opening, and a valve piston axially movable in the opening between first and second positions. The body defines a first inlet for receiving a first material, and a second inlet for rec

A diverter valve controlling input of two different extruded materials has a valve body having an axially extending opening, and a valve piston axially movable in the opening between first and second positions. The body defines a first inlet for receiving a first material, and a second inlet for receiving a second material with first and second outlets opposite the inlets. The piston has first and second through channels and first and second cross-over channels, each with inlet side and outlet side ports. A first flushing channel communicates with the first inlet and end ports, a second flushing channel communicates with the second inlet and end ports, and a third flushing channel opposite the first two communicates with the second outlet and includes a plurality of ports, with all the ports, inlets and outlets open to the axial opening.

대표청구항 ▼

1. A diverter valve for controlling input of two different extruded materials to a mold for molding one of said materials covering the other of said materials, comprising: a valve body having an axially extending opening therethrough;a valve piston selectively axially movable in said body opening be

1. A diverter valve for controlling input of two different extruded materials to a mold for molding one of said materials covering the other of said materials, comprising: a valve body having an axially extending opening therethrough;a valve piston selectively axially movable in said body opening between a first position and a second position;wherein: said valve body defines a first inlet in one side adapted to received a first extruded material, and a second inlet in said one side adapted to receive a second extruded material,a first outlet in the side opposite of said one side, and a second outlet in the opposite side,a first flushing channel communicating with said first inlet and including end ports open to said axial opening,a second flushing channel communicating with said second inlet and including end ports opening to said axial opening, anda third flushing channel communicating with said second outlet and including a plurality of ports opening to said axial opening,said piston defines first and second through channels extending between said one side and said opposite side,a first cross-over channel having an inlet side port and an outlet side port, anda second cross-over channel having an inlet side port and an outlet side port;whereby in said first position, said first through channel connects said first inlet with said first outlet and said second through channel connects said second inlet with said second outlet,said valve piston blocks said end ports of said first flushing channel, andsaid first and second cross-over channels connect said second and third flushing channels to allow flow of material therein from the second inlet, andin said second position; said first cross-over channel connects said first inlet with said second outlet and said second cross-over channel connects said second inlet with said first outlet,said valve piston blocks said end ports of said second flushing channel, andsaid first and second through channels connect said first and third flushing channels to allow flow of material therein from the first inlet. 2. The diverter valve of claim 1, wherein flow of material from the flushing channels to the first outlet is blocked in both said first and second positions of said valve piston. 3. The diverter valve of claim 1, wherein said first and second inlets are axially spaced a distance X, and said first and second outlets are axially spaced the distance X, said first and second through channels are axially spaced the distance X, said inlet side port of said first cross-over channel and said inlet side port of said second cross-over channel are axially spaced the distance X, and said outlet side port of said first cross-over channel and said outlet side port of said second cross-over channel are axially spaced the distance X. 4. The diverter valve of claim 3, where said second cross-over channel inlet side port is axially aligned with said first cross-over channel outlet side port and said second cross-over channel outlet side port is axially aligned with said first cross-over channel inlet side port. 5. The diverter valve of claim 1, wherein said first and second through channels have an axially extending width W;said first and second cross-over channel ports have an axially extending width W; andthe axially adjacent ports are spaced at their nearest points a distance S;wherein S