Extrusion head for producing sheet material reinforced internall

Details Extrusion head for producing sheet material reinforced internall Extrusion head for producing sheet material reinforced internall

1989-04-17

1990-08-14

Housel, James C.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Extrusion shaping means

4253761, 425467, 425818, B29C 4702

Patent

active

049483544

ABSTRACT:
An extrusion head 1 for producing sheet material 2, particularly elastomeric material, reinforced internally with relatively close-packed metal or textile cords 3; on which a die adapter 8 houses a "mandrel" 23 aligned with an output die 16 for the extruded sheet material 2 and having an axial slot 31 for feeding the reinforcing cords 3 to the die 16; the aforementioned mandrel 23 having, on its front end facing the die 16, an insert 32 defining, together with the die adapter 8, an upper channel 34 and a lower channel 35 for supplying plastic material; which insert 32 consists of an upper element 40 and a lower element 41, the front ends of which are arranged contacting so as to define a cord output guide member 56, and the rear ends of which are gripped together with the interposition of an intermediate element 47, so as to define two superimposed cord input guide members 61, 62 converging inside the output guide member 56, having a cord density equal to half that of the output guide member 56, and offset by half the space between two adjacent cords in relation to each other.

REFERENCES:
patent: 1603812 (1926-10-01), Stein
patent: 1727090 (1929-09-01), Alderfer
patent: 2061749 (1936-11-01), Beal
patent: 3403422 (1968-10-01), Nakagawa et al.
patent: 3553069 (1971-01-01), Rasmussen
patent: 3567545 (1971-03-01), Bobkowicz et al.
patent: 4274821 (1981-06-01), Kiemer

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