A plurality of trough extruders are supported upon a lift truck traveling in a circular travel path. The plurality of trough extruders continuously form one piece troughs as the lift truck travels its circular path. A lift mechanism progressively raises the extruders as the lift truck travels its circular path two form continuous one-piece helical water troughs for use in an agricultural growing structure.

An apparatus for feeding a screw-type extruder with material strips made of rubber mixtures or plastics mixtures, which strips are arranged in a folded zig-zag shape and can be supplied by means of at least one conveyor belt to a supply region of a supply element that is funnel-shaped, at least in portions, and an extruder. A motor-driven conveyor device for the material strip is arranged within the supply region, which device comprises a pressure surface that can abut the surface of the material strip and can be moved in a reversing manner. Said pressure surface only abuts the surface of the material strip in the conveying direction and, in the direction opposite the conveying direction, it adopts a return position in which it is spaced from the surface of the material strip.

A device arranged in the cooling ring of an apparatus for the production of blown films in order to adjust the thickness profile thereof is disclosed. The device includes a plurality of equally spaced motor-driven actuators that adjust the flow rate of the flow of a cooling fluid directed towards a forming cone, as well as a plurality of equally spaced resistances provided with finned dissipators arranged in the path of the cooling flow. In this way, the device combines the characteristics of low power consumption and high adjustment velocity of a volumetric device with the higher angular resolution achievable through the heating elements of a thermal device, and all of this with an operating method that prevents the risks of bubble instability or adhesion, achieves a high energy efficiency and guarantees a wide thickness adjustment range.

The present invention relates to an overturning device (10) for overturning a molten material (200) in a melt channel (110) comprising a melt inlet (20) and a melt outlet (30), wherein between the melt inlet (20) and the melt outlet (30) at least a melt guidance means (40) is assembled for a rearrangement of molten material (200) from the centre (22) of the melt inlet (20) to the edge (34) of the melt outlet (30) and for a rearrangement of molten material (200) from the edge (24) of the melt inlet (20) into the centre (32) of the melt outlet (30).

The invention relates to additive manufacturing technologies and can be used for manufacturing parts and structures of composite materials reinforced by continuous fibers. The technical result is improving physical and mechanical characteristics and reducing the weight of products having a complex shape made of composite materials.

The technical result is achieved by a print head containing a mechanism for supplying a plastic filament, a mechanism for supplying a reinforcing fiber, a mechanism for cutting the reinforcing fiber, a feed tube for the plastic filament, feed tubes for the reinforcing fiber and a heating unit. Furthermore, the heating unit contains a heater, a thermocouple or thermoresistor, and two inlet channelsa channel for the reinforcing fiber and a channel for the plastic filamentand a nozzle having an outlet channel for the reinforced plastic. Furthermore, the channel for the plastic filament is connected to the channel for the reinforcing fiber inside the heating unit, while the inlet channel for the reinforcing fibre is arranged coaxially with the outlet channel for the reinforced plastic. The invention makes it possible to increase the physical and mechanical characteristics of the product, to reduce the weight of the product, to reduce the cost of manufacture of complex shape products from composite materials.

A device for the continuous production of a solid form, including: an extruder for mixing and hot-melting at least one component with at least one polymer for an amorphous solution; and a cutting device mounted downstream of the extruder, for cutting the semi-solid bead that results from the melting of the mixture of the component with the polymer for an amorphous solid solution, the cutting device being combined with a forming system for forming the solid form supplied by the cutting device.

An extruder has a valve assembly configured to move pins to open and close the nozzles in a multi-nozzle extruder head independently. The pins of the valve assembly that are driven by actuators into and out of engagement with nozzles in the extruder head are positioned within sleeves that extend between the valve assembly and the extruder head. A gap is provided between the extruder head and the end of the sleeves proximate the extruder head to enable thermoplastic material leaking from the extruder that contacts the pins to remain in a melted or plastic state so the thermoplastic material does not interfere with the movement of the pins.

A ram extrusion apparatus including a die having several thermal zones, a hopper for introducing a granular polymer resin to the die, and a ram for moving the granular polymer resin through the thermal zones of the die and out from an outlet end thereof at a temperature above the crystalline melt temperature of the polymer resin. The hopper may be designed to deliver the polymer resin into a resin inlet of the die in a plurality of specifically metered amounts which may vary across a width of the resin inlet end of the die. The apparatus may further include one or more finishing tables positioned after the outlet end of the die for receiving and moving the extruded resin away from the outlet end of the die so that there is no backpressure on the extruded resin, and which provide compression force and even cooling to the extruded resin.

A method for replacing one or more components of a lip adjustment assembly mounted to a die body of an extrusion die is disclosed. Initially, a translating unit of the lip adjustment assembly is accessed through an exposed end of the lip adjustment assembly. Then, an adjustment actuator is removed from a translator of the translating unit. The translator is decoupled from a rod of the translating unit so that the translator is removable from the lip adjustment assembly and with respect to the rod. Next, the translator is removed from the lip adjustment assembly and a first component of the translating unit is replaced with a second component of the translating unit.

Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.