Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

The present invention relates to a worm shaft for a mixing and kneading machine particularly for continual processing having a shaft bar, on the circumferential surface of which blade elements are arranged to be spaced apart from one another extending outwards from the circumferential surface of the shaft bar, wherein the blade elements are arranged on the circumferential surface of the shaft bar, at least in one section extending in the axial direction of the worm shaft, in two rows extending in the axial direction of the worm shaft.

The present invention relates to a worm shaft for a mixing and kneading machine in particular for continuous preparation processes, comprising a shaft rod, on the circumferential surface of which blade elements are arranged which are spaced apart from one another and which extend outward from the circumferential surface of the shaft rod, wherein the blade elements are arranged on the shaft rod, at least in one section extending in the axial direction of the worm shaft, in three rows extending in the axial direction of the worm shaft, wherein at least one of the blade elements of one of the rows is different from one of the blade elements of one of the other rows, and/or the rows of blade elements, viewed in cross-section of the shaft rod, are distributed irregularly over the circumference defined by the outer circumferential surface of the shaft rod.

A multi-shaft kneading machine includes a channel and two screws rotatable around first axes of rotation. A pair of gate rods sandwich the two screws and are rotatable around second axes of rotation. Each of the pair of gate rods has two recess parts that form respective spaces through which the two screws penetrate. Each of the pair of gate rods has a first contact surface, which comes into surface contact with a screw when a gate rod is rotated to a minimum degree-of-opening position. Large diameter parts are fitted into the groove of the cylinder, and a small diameter part have a radius of curvature equal to half a distance between two second axes of rotation and smaller than a radius of curvature of the large diameter parts. The small diameter parts of the pair of gate rods are in contact with each other.

A planetary roller extruder includes a housing with an internal housing toothing. A central spindle is disposed in the housing and has an external central spindle toothing. A plurality of planetary spindles are disposed about the central spindle and in the housing. Each of the planetary spindles has an external planetary spindle toothing configured to mesh with the internal housing toothing and the external central spindle toothing. A drive is configured to rotate the central spindle. The drive includes a drive journal connected to the central spindle to permit transmission of a driving force from the drive to the central spindle. The drive journal includes a bore. The bore has internal projections configured to engage with the external central spindle toothing to secure the central spindle to the drive journal by a screw-type connection.

An extruder includes a cylinder and a screw that is accommodated in the cylinder, in which an inner peripheral surface of the cylinder includes first and second groove formed regions each of which has a groove formed therein, in the first groove formed region, a height of a mountain portion forming the groove is constant, and a presence range of the second groove formed region in an axial direction at least partially overlaps a presence range of a material feed port in the axial direction, and a height of a mountain portion forming the groove in the second groove formed region is lower than the height of the mountain portion of the first groove formed region.

The invention relates to the production of PSA in a planetary gear extruder. During filling and after passing a passage on a dispersing ring using a lateral arm extruder, the products are degassed.

A housing component, for the production of a housing of a multi-shaft screw machine, includes a base body, in which at least two bores interpenetrating each other are configured. The bores extend in a conveying direction through the base body and are limited transversely to the conveying direction by an inner wall. The inner wall configures at least one first wall section and at least one second wall section such that the at least one first wall section is harder than the at least one second wall section. The wall sections, for example, are generated by material application. The housing component allows for a reliable wear protection and a positive influence on the material processing.

A housing component, for the production of a housing of a multi-shaft screw machine, includes a base body, in which at least two bores interpenetrating each other are configured. The bores extend in a conveying direction through the base body and are limited transversely to the conveying direction by an inner wall. The inner wall configures at least one first wall section and at least one second wall section such that the at least one first wall section is harder than the at least one second wall section. The wall sections, for example, are generated by material application. The housing component allows for a reliable wear protection and a positive influence on the material processing.

Present invention is related to an extrusion equipment for processing a fibre composite. The extrusion equipment comprises a decompression and a melt tank arranged and operated vertically along with the direction of gravity. The melt tank comprises a melt tank impregnation section and a melt tank control section with a melt tank cavity as a channel condition defined within. The channel has its inner diameter or passage gradually decreased from top to bottom. The extrusion equipment provided by the present invention is configured in the direction of gravity for processing the melted thermoplastic resin and the fibre vertically for avoiding fibre fracture or breakage and improving the quality of the final products. As the melted plastic is processed vertically along with the gravity, the melted plastic could transfer or pass through the channel quickly without resulting decomposition due to the high heat and the long retention time in the cavity.