A screw press for separating off liquid from an article, comprising a screw shaft together with a conveying helix, which is arranged helically on the screw shaft, and a housing enclosure, which surrounds the conveying helix, wherein a transporting passage for the article which is to be conveyed is formed between the screw shaft, the conveying helix and the housing enclosure, wherein a composite comprising hard-material particles which are embedded in a matrix component to form surface roughness is fastened with material bonding to at least one surface portion of the screw shaft, within the transporting passage. A use of a composite comprising hard-material particles which are embedded in a uniformly distributed manner in a matrix component to form surface roughness, for the purpose of providing fastening with material bonding to at least one surface portion of a screw shaft.

A pressing apparatus in a manner of a cage-type screw press, wherein the strainer cage is split up into a plurality of strainer-cage segments. The strainer-cage segments can be sealed along their adjacent sides with the aid of sealing devices so that liquids and solids are effectively prevented from escaping from the gaps between the strainer-cage segments.

A pressing apparatus in a manner of a cage-type screw press, wherein the strainer cage is split up into a plurality of strainer-cage segments. The strainer-cage segments can be sealed along their adjacent sides with the aid of sealing devices so that liquids and solids are effectively prevented from escaping from the gaps between the strainer-cage segments.

Disclosed is a laminated spiral solid-liquid separator with a torsional pendulum motion, the separator comprising fixed rings, movable rings and a screw shaft, wherein the screw shaft is provided with the fixed rings and the movable rings in a staggered arrangement in a radial direction to form a cavity. The separator further comprises a support rod sleeved in one end of the movable ring. The movable rings connect all the movable rings together to form a linkage by means of one or more kind of linkage mechanisms. The linkage is driven by one or more drive devices to swing about the support rod which is served as the center. Support devices are arranged on two or more positions in the cavity. Both a fixing rod on the fixed rings and the support rod on the movable rings pass through the support devices.

Disclosed is a laminated spiral solid-liquid separator with a torsional pendulum motion, the separator comprising fixed rings, movable rings and a screw shaft, wherein the screw shaft is provided with the fixed rings and the movable rings in a staggered arrangement in a radial direction to form a cavity. The separator further comprises a support rod sleeved in one end of the movable ring. The movable rings connect all the movable rings together to form a linkage by means of one or more kind of linkage mechanisms. The linkage is driven by one or more drive devices to swing about the support rod which is served as the center. Support devices are arranged on two or more positions in the cavity. Both a fixing rod on the fixed rings and the support rod on the movable rings pass through the support devices.

A juice-extracting drum includes a screw rotating inside. An inner module includes a hollow cylinder with an upper portion having the screw. A plurality of slits are formed as penetration holes having both lateral sides, an upper surface, and a lower surface along an interior circumference. An outer module is detachably coupled to the inner module, and includes a rib protruding in a radially interior direction on an interior circumference. The rib is inserted into the slit of the inner module when the outer module surrounds and combines the inner module. A predetermined fixed gap discharging juice extracted by the screw is formed lengthily in an up and down direction between the lateral side of the slit of the inner module and a lateral side of the rib of the outer module. The fixed gap is formed in a direction intersecting the screw blade.

A juice-extracting drum includes a screw rotating inside. An inner module includes a hollow cylinder with an upper portion having the screw. A plurality of slits are formed as penetration holes having both lateral sides, an upper surface, and a lower surface along an interior circumference. An outer module is detachably coupled to the inner module, and includes a rib protruding in a radially interior direction on an interior circumference. The rib is inserted into the slit of the inner module when the outer module surrounds and combines the inner module. A predetermined fixed gap discharging juice extracted by the screw is formed lengthily in an up and down direction between the lateral side of the slit of the inner module and a lateral side of the rib of the outer module. The fixed gap is formed in a direction intersecting the screw blade.

A low speed seed oil expeller press with the capability of extracting oil through a new design that does not crush or grind the seed so as to eliminate the need for filtration and maintain the seed oil at a temperature below 130 degrees F. The seed oil expeller press has a seed preheating capability and controls the pressure and extraction oil temperature by manipulation of the expeller speed, the head volume and the size of the pressed seed exit orifice. The seed oil expeller press eliminates seed rotation within the head volume so as to eliminate crushing, grinding or tearing of the seed by a symmetrical knifed press head. The seed oil expeller press regulates seed temperature, seed feed rate, seed pressure, seed rotation and extracted seed oil temperature so as to compensate for the seed size, seed hardness and seed oil content, so as to allow for seed compression without crushing or tearing to accomplish seed oil extraction at a low (cold press) temperature.

A waste treatment machine is disclosed, having a safety sensor which generates an alarm signal to stop the motor (7) when the requested torque exceeds a certain threshold, but has a gear with a friction transmission belt (8), i.e. not a toothed belt, between a driving pulley (9) and an idle pulley (10) connected to a shaft (6) for squeezing/grinding waste. The friction transmission belt is tightened so as to slip when a nominal maximum torque is exceeded. The protection sensor is configured to detect slippage of the friction transmission belt and to provide in such an event an alarm signal to a control unit that interrupts a normal miming of the motor. The organic waste treatment machine may be a single-worm screw (4) or double-worm screw squeezing machine, or a grinding machine with hammers (13) pivoted at the periphery of a shaft installed in the inner chamber of the machine. A method of controlling such a machine for treating waste is also disclosed.

A juicer having a juice extracting screw assembly, in which a housing with a juice extracting screw installed in the housing has a simplified interior structure, thereby reducing the production cost of the juicer and easily dispensing juice and residue separately using respective passages.