Disclosed are a polypropylene composite material capable of blasting at a low temperature, and a preparation method therefor and application thereof. The polypropylene composite material comprises the following components in parts by weight: 35-75 parts of special polypropylene A, 3-10 parts of special polypropylene B, 15-30 parts of a filler, 2-10 parts of a special toughening agent, 15-25 parts of a toughening agent, 0.1-0.3 part of a lubricant, 0.1-0.3 part of a photostabilizer, and 0.2-0.6 part of an antioxidant, wherein the special toughening agent comprises ultrahigh molecular weight polyethylene and a metallocene ethylene-propylene copolymer. The polypropylene composite material that is capable of blasting at a low temperature and has good rigidity is prepared by using the special polypropylene A, the special polypropylene B, and the special toughening agent in combination with the normal filler and the normal toughening agent, and the polypropylene composite material has a wide application prospect.

A screw machine includes an inductive heating device for processing of material to be processed. The inductive heating device is used to heat the material in a heating zone. In the heating zone, at least one housing portion is made of an electromagnetically transparent material at least partly, the material being non-magnetic and electrically non-conductive, whereas at least one treatment element shaft is made of an electrically conductive material at least partly. The inductive heating device includes at least one coil formed integrally with a component of the at least one housing portion, in particular in such a way as to form a hybrid component. During the processing of the material, the inductive heating device generates an alternating magnetic field that produces eddy current losses in the at least one treatment element shaft, the eddy current losses leading to a temperature increase of the at least one treatment element shaft.

High thermal transfer, hollow core extrusion screws (50, 52, 124, 126, 190) include elongated hollow core shafts (54, 128, 130, 192) equipped with helical fighting (56, 132, 134, 194) along the lengths thereof. The fighting (132, 134, 194) may also be of hollow construction which communicates with the hollow core shafts (54, 128, 130, 192). Structure (88, 90) is provided for delivery of heat exchange media (e.g., steam) into the hollow core shafts (54, 128, 130, 192) and the hollow fighting (132, 134, 194). The fighting (56, 132, 134, 194) also includes a forward, reverse pitch section (64, 162, 216). The extrusion screws (50, 52, 124, 126, 190) are designed to be used as complemental pairs as a part of twin screw processing devices (20), and are designed to impart high levels of thermal energy into materials being processed in the devices (20), without adding additional moisture.

An extruder for making meat analogue products, where the extruder comprises a product outlet (22), and a longitudinal barrel (8) comprising an inner surface (14) and an outer surface, and where the extruder further comprises heating means for heating at least a part of said inner surface, where said barrel (8) interconnects with said product inlet (5) and outlet (22), where the extruder further comprises a rotor (16) arranged coaxially inside said barrel (8), where said rotor (16) comprises drive means (19) for rotating said rotor (16) in relation to the barrel (8).

A single-screw extrusion desulfurization and post-processing system and a method for preparing reclaimed rubber. The single-screw extrusion desulfurization and post-processing system comprises: a single-screw desulfurization device, a single-screw post-processing device and a closed connection device for connecting the single-screw desulfurization device and the single-screw post-processing device, the single-screw post-processing device includes a post-processing feeding unit and a post-processing unit which are connected with each other, and a post-processing screw running through the post-processing feeding unit and the post-processing unit.

The present disclosure relates to an extrusion system including a die plate configuration to reduce inconsistent flow of an extruded product and the accompanying distortions of the extruded product.

A method of fabricating a high-altitude balloon. The method includes coextruding at least two adjacent continuous layers of extrudate, extrusion-bonding the layers of extrudate to one another along an edge of the sheets of extrudate to form a seam, and cooling the extrudate.

A method for forming an object made of a polymeric material, wherein the polymeric material has a melting temperature (Tf), comprising the following steps: melting the polymeric material; cooling the polymeric material below the melting temperature (Tf); extruding the polymeric material into a tubular shaped body (H); inserting the tubular body (H) into a mould (60) having an internal cavity; closing off the tubular body (H) at a first end thereof; blowing air into the tubular body (H) through a second end, in order that the tubular body (H) adheres to the internal cavity of the mould (60).

A single-screw extrusion desulfurization and post-processing system and a method for preparing reclaimed rubber. The single-screw extrusion desulfurization and post-processing system comprises: a single-screw desulfurization device, a single-screw post-processing device and a closed connection device for connecting the single-screw desulfurization device and the single-screw post-processing device, the single-screw post-processing device includes a post-processing feeding unit and a post-processing unit which are connected with each other, and a post-processing screw running through the post-processing feeding unit and the post-processing unit.

There is provided a two-direction heating system which comprises one or more heat-absorber modules. Each heat-absorber module comprises a heat-absorber barrel, a heat-absorber screw attached to an internal region of the barrel, and one or more heating units each attached to an external region of the barrel. Heat generated by the heating unit and delivered to first heat-absorber receptors provided on an inner surface of the barrel and second heat-absorber receptors provided on an outer surface of the screw, circulates from the barrel to the screw and from the screw to the barrel, and is thereby transferred to a material placed in the interior region of the heat-absorber barrel.