There are provided a straining mechanism and a screw extruder including the straining mechanism, which can minimize material passing resistance in a breaker plate even, in a large-sized apparatus having high throughput, and which can improve the throughput by suppressing load power of the apparatus and heat generation of a material. For this purpose, a backup plate having an opening rate higher than an opening rate of a breaker plate and supporting the breaker plate is installed on a rear surface side of the breaker plate supporting a screen mesh.

A printing system includes a printing assembly and a gas delivery system includes a gas nozzle assembly. The print assembly and gas nozzle assembly may include a first portion and a second portion that may translate with respect to each other. When the first portion is subjected to a sufficient force the first portion may translate with respect to the second portion.

Service platforms are provided for accessing the collapsing frame of blown film extrusion apparatus. The service platforms provide an access platform capable of being placed proximate the collapsing frame of the blown film extrusion apparatus to allow for service, maintenance and/or cleaning of the apparatus.

Service platforms are provided for accessing the collapsing frame of blown film extrusion apparatus. The service platforms provide an access platform capable of being placed proximate the collapsing frame of the blown film extrusion apparatus to allow for service, maintenance and/or cleaning of the apparatus.

A supply of build material such as a spool or cartridge is instrumented with a data tag that includes information about the build material. A three-dimensional printer, or a tag reader in communication therewith (directly or indirectly), can read the information from the tag for a determination as to how to use the build material during fabrication of a three-dimensional object.

The invention provides devices that are attached to an extruder making the operation thereof more efficient and convenient and allowing for a quick change over of parts used to make various products prepared in the extrusion process. A high pressure relief assembly is attached to the extruder that allows for the rapid release of pressure from the extruder at the end of the process by venting product under pressure from the extruder and the extruder also has attached thereto a quick assembly locking device that allows for the exchange of assemblies, such as a density control assembly and other assembles, without the removal of nuts, bolts, and clamps by attaching the assembly to an arm that can be moved in and out of place in front of the extruder and wherein the device has a locking mechanism that seals and releases the assembly from the extruder.

A blown film coextrusion line includes a support frame, a plurality of extruders each mounted to the support frame and extending upward at an angle, and a downward facing blown film coextrusion die connected to distal ends of each of the plurality of extruders and receiving individual polymer streams from them. The blown film coextrusion line is compact and sturdy and eliminates much of the floor space and towered mounting structure that was required for conventional blown film coextrusion lines. A corresponding method of making a multilayer coextruded blown film is also provided.

A fin block is provided for a calibrating device for the calibrating of an extruded plastic profile, wherein the fin block includes a back structure and a fin structure having a plurality of fins. The fins are spaced apart from one another and arranged on the back structure in longitudinal direction (L) of the back structure. The back structure of the fin block has a plurality of apertures, the shape and/or arrangement of which within the back structure depends on a predetermined mechanical load capacity for the back structure. Furthermore, a method for the production of the above-mentioned fin block and a calibrating device, which includes a plurality of the above-mentioned fin blocks, is provided. Furthermore, a system for the additive manufacture of the above-mentioned fin block, a corresponding computer program and a corresponding data set is provided.

A hand extruder, particularly for welding parts made of plastics, has a main body which supports an extrusion means for the extrusion of plastic material, an actuation means actuating the extrusion means, a heating means heating the plastic material, a preheating means preheating parts to be welded, and a control means controlling the hand extruder; a grip detachably connected to the main body by an interconnection means preset to pass from a coupling configuration, in which the grip is joined to the main body, to an uncoupling configuration, in which the grip is separated from the main body; the interconnection means has an electrical mating means of the plug-socket type electrically and detachably connecting at least part of the means supported by the main body to an electrical control means arranged on the grip.

A blown film coextrusion line includes a support frame, a plurality of extruders each mounted to the support frame and extending upward at an angle, and a downward facing blown film coextrusion die connected to distal ends of each of the plurality of extruders and receiving individual polymer streams from them. The blown film coextrusion line is compact and sturdy and eliminates much of the floor space and towered mounting structure that was required for conventional blown film coextrusion lines.