Machine for making dry cast concrete pipe

Details Machine for making dry cast concrete pipe Machine for making dry cast concrete pipe

1977-08-03

1978-12-26

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Press forming apparatus having opposed press members

Periphery of female mold limiting the movement of a dynamic...

425414, 425421, 425423, 425432, 425438, B28B 2112

Patent

active

041314085

ABSTRACT:
A machine for making a dry cast concrete pipe. The machine has a cross head carrying a rotatable shaft extended downwardly into a core supported on a turntable. An outer form mounted on the turntable surrounds the core. A head attached to the lower end of the shaft is engageable with the core to raise the core out of the outer form in response to upward movement of the cross head. Arms secured to the shaft above the core rotate with the shaft to move concrete from the top of the core into the annular chamber between the core and outer form. An annular press ring mounted on a top table is moved into the top area of the annular chamber to compact concrete before the core is withdrawn from the outer form.

REFERENCES:
patent: 3141222 (1964-07-01), Steiro
patent: 3343236 (1967-09-01), Helms
patent: 3922133 (1975-11-01), Crawford et al.

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