Calibration method for machines for the production of segmented extruded products comprising the steps of: activating an extrusion process according to a plurality of operating parameters suitable for producing a segmented extruded product having at least one segmentation portion (6); injecting a marker at the segmentation portion (6) during its extrusion; detecting a plurality of characterizing parameters of the marker and/or of the segmentation portion (6), by selecting at least one of spatial distribution of the segmentation portion (6) and axial and/or radial position of the segmentation portion (6); selecting at least one operating parameter according to at least one of the detected characterizing parameters, so as to modify spatial distributions and/or axial and/or radial positions of the segmentation portion (6).

A process and associated system for creating color effects using extrudable material, such as plastic and metal for example, are presented. Flows of first and second viscous materials of respective colors are provided and then combined in a predetermined pattern to form a stream of combined viscous material. A dynamic mixer is the then used to apply a predetermined dividing, overturning and combining motion to the stream of combined viscous material to partially mix the first viscous material and the second viscous material, such that upon exiting the dynamic mixer, the first material of the first color and the second material of the second color form a color pattern in the stream of combined viscous material. The dynamic mixer has elements configured for acquiring a specific radial orientation in a range of radial orientations that may be varied during the application of the dividing, overturning and combining motion to the stream of combined viscous material to cause variations in the color pattern in the stream of combined viscous material. Sheets of extruded material may be created using such process and system and used in the manufacturing of many different products including, but not limited to, kayaks, stand-up paddle boards, garden furniture and many others. In some embodiments, the sheets may be characterized by color bands extending diagonally with reference to a longitudinal extent of the sheet.

A process and associated system for creating color effects using extrudable material, such as plastic and metal for example, are presented. Flows of first and second viscous materials of respective colors are provided and then combined in a predetermined pattern to form a stream of combined viscous material. A dynamic mixer is the then used to apply a predetermined dividing, overturning and combining motion to the stream of combined viscous material to partially mix the first viscous material and the second viscous material, such that upon exiting the dynamic mixer, the first material of the first color and the second material of the second color form a color pattern in the stream of combined viscous material. The dynamic mixer has elements configured for acquiring a specific radial orientation in a range of radial orientations that may be varied during the application of the dividing, overturning and combining motion to the stream of combined viscous material to cause variations in the color pattern in the stream of combined viscous material. Sheets of extruded material may be created using such process and system and used in the manufacturing of many different products including, but not limited to, kayaks, stand-up paddle boards, garden furniture and many others. In some embodiments, the sheets may be characterized by color bands extending diagonally with reference to a longitudinal extent of the sheet.

A concrete dowel placement system and methods for making the same. The system allows for accurate and easy substantially-parallel or parallel placement of slip dowels within sections of concrete so that adjacent sections of concrete may be allowed to undergo thermal expansion and contraction while remaining in a common plane without cracking or faulting. The system includes a coupler and a sheath. The sheath is configured to be slidably extensible over the coupler and may be held to the coupler by friction. An outer surface of the sheath may be textured. Additionally, a method of constructing the concrete dowel placement system includes extruding material to form two tubes of different sizes. The tubes are then attached to each other, then material is extruded or injection molded to form a sheath. Alternatively, construction may include extruding material to form a tube, then removing some of the material from the tube in order to form a coupler.

A concrete dowel placement system and methods for making the same. The system allows for accurate and easy substantially-parallel or parallel placement of slip dowels within sections of concrete so that adjacent sections of concrete may be allowed to undergo thermal expansion and contraction while remaining in a common plane without cracking or faulting. The system includes a coupler and a sheath. The sheath is configured to be slidably extensible over the coupler and may be held to the coupler by friction. An outer surface of the sheath may be textured. Additionally, a method of constructing the concrete dowel placement system includes extruding material to form two tubes of different sizes. The tubes are then attached to each other, then material is extruded or injection molded to form a sheath. Alternatively, construction may include extruding material to form a tube, then removing some of the material from the tube in order to form a coupler.

A weatherstrip manufacturing method is a method for manufacturing a weatherstrip which includes a trim portion where an insert is embedded. The insert includes short connecting portions that connect strips at substantially regular intervals, and a long connecting portion having a larger length than each length of the short connecting portions. The method includes an extrusion molding step for covering the insert with a polymer material, a cut-off portion forming step for cutting off a part of a long interval portion including the long connecting portion in the long interval portion where the long connecting portion is embedded to form a cut-off portion, and a cutting step for cutting the cut-off portion in a crossing direction orthogonal to a longitudinal direction to divide the weatherstrip in the longitudinal direction.

A thermoplastic resin composition and a molded article including the same can include 100 parts by weight of a base resin including 10 to 50% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.3 to 0.5 μm, 5 to 40% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.05 μm or more and less than 0.3 μm, and 20 to 65% by weight of an aromatic vinyl polymer (B), and 0.5 to 12 parts by weight of a polyamide (C). The thermoplastic resin composition can have a solvent resistance of 15 days or more.

A thermoplastic resin composition and a molded article including the same can include 100 parts by weight of a base resin including 10 to 50% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.3 to 0.5 μm, 5 to 40% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.05 μm or more and less than 0.3 μm, and 20 to 65% by weight of an aromatic vinyl polymer (B), and 0.5 to 12 parts by weight of a polyamide (C). The thermoplastic resin composition can have a solvent resistance of 15 days or more.

A mold for extrusion molding includes an extrusion port and a plastic channel. The extrusion port is configured to extrude a plastic composition containing at least one kind of plastic. The plastic channel is configured to cause the supplied plastic composition to flow to the extrusion port. The plastic channel includes a first channel, a second channel, and a third channel. The second channel is connected to the first channel and has a channel cross-sectional area gradually decreasing downstream in a flowing direction of the plastic composition. The third channel is connected to the second channel and configured to cause the plastic composition to flow to the extrusion port. The third channel has a channel cross-sectional area gradually decreasing downstream in the flowing direction of the plastic composition.

A blow molding assembly includes a die, a mandrel, and a die holder. The die defines an inner wall. The mandrel is disposed at least partially inside the inner wall of the die and defines, with the inner wall of the die, an annular gap that shapes a molten resin passed therethrough, forming a parison. The die holder includes a body and three or more spring-loaded fasteners positioned around an inner perimeter of the body. The spring-loaded fasteners apply pressure to respective positions on an outer surface of the die while permitting movement of the die within a plane that is substantially orthogonal to a longitudinal axis of the mandrel in response to pressure variations of the molten resin, keeping a thickness of the parison substantially even. Each of the spring-loaded fasteners includes a spring-loaded plunger engaging the respective position on the outer surface of the die.