摘要:
A process and associated system for creating color effects in 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. In a first aspect, the flow rate of the first viscous material is caused to vary over time in order to vary an amount of the first viscous material in the stream. In a second aspect, which may be used alone or in combination with the first aspect, the first and second viscous materials have distinct viscosities to reduce an amount of color blending between the first color and the second color in the stream of combined viscous material. A static mixer may then be 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 static 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. Sheets of extrudable material may be created using such process and used in the manufacturing of many different products including for example kayaks and stand-up paddle boards.
摘要:
The present invention provides a method for manufacturing an imitation wood and is featured by adjusting the temperature of a discharge outlet before or during conveyance of thermoplastic elastomers in a helical section of a screw extruder to be lower than the temperature of a tail end of the helical section, such that the viscosity of the thermoplastic elastomers in the discharge outlet increases and the flow velocity reduces at the outlet during the discharge process at the discharge outlet. Thus, the thermoplastic elastomers flow in a direction opposite to the discharge direction and rub, resulting in marks of back-flow and rubbing. During the process of back-flow and rubbing, the plastics will be pulled and break along the rubber elastomers and become filament-like, thereby generating filaments similar to wood. Then, the foaming blank material is squeezed out of the discharge outlet and is forced into a molding machine to proceed with planarity trimming, and the output material is cooled with a preset cold-bath tank of the molding machine, providing adjustment of different densities of imitation wood, such that the imitation wood produced by the present invention has high simulation of wood.
摘要:
The present invention relates to a machine for manufacturing solid recovered fuel, to a process for obtaining solid recovered fuel and to the solid recovered fuel obtained from said process. The homogenization extruder machine comprises a main body (7) provided with a feed opening (6), an extruder screw (9) and an outlet (14), characterized in that it comprises a compression cone (11) arranged at the final end of the extruder screw (9) and opening and closing means (12) for opening and closing the outlet (14).
摘要:
The invention relates to a method for extruding plastic material using a screw-type extruder (S), wherein a first pressure (P1) of the material to be extruded is measured in at least one location in the feed region (EB) of the at least one screw (2) and/or in the melting region (A) of the housing (1), the plastic material agglomerating and/or softening and being present in and not yet, in particular not completely, melted state and/or being present not yet homogeneously as a melt in said location or in said melting region. According to the invention, the material supply to the extruder (S) and/or the charge quantity is measured or controlled as a function of the measured first pressure (P1).
摘要:
A process for the production of a coated plasticising screw for the injection molding or extrusion of plastic material, wherein at least the wearing surfaces of the plasticising screw are coated with a metal-based alloy, comprising the following steps:coating at least said wearing surfaces with said alloy,heating the coated plasticising screw for fusing said alloy to said plasticising screw, andcooling off said coated plasticising screw,wherein in the fusing operation all the coated wearing surfaces are simultaneously exposed to a temperature which is above the melting temperature of said alloy.
摘要:
The present invention provides novel biolatex conjugate compositions and methods of production and use thereof. The novel biolatex conjugate compositions comprise a biopolymer-additive complex (prepared by co-extruding a biopolymer feedstock, at least one performance-enhancing additive, and at least one plasticizer under shear forces) reacted with a crosslinking agent under shear forces. The biolatex conjugate compositions exhibit enhanced performance properties for coated paper, paperboard, and other applications using extremely low levels of performance-enhancing additives.
摘要:
An extrusion conveying device having an extruder for the mixing of components, in particular a rubber mixture or TPE. A volumetrically operating conveyor, especially a gear pump, is disposed at the output side of the extruder. A subsidiary conveyor supplies to the extruder at least one component having a marker substance. A detection device for the marker substance is disposed on the output side of the extruder and/or the volumetrically operating conveyor for detecting the distribution quality of the marker substance. A control device is coupled to the detection device for adjusting the speed of the extruder and/or the volumetrically operating conveyor in response to the detected distribution quality of the marker substance detected by the detection device.
摘要:
Improved extruders and methods for the extrusion cooking of comestible products such as human foods or animal feeds are provided wherein the products may be produced with very low specific mechanical energy (SME) inputs as compared with conventional processing. The methods preferably involve introduction of very high levels of steam into the extruder barrel (12) during processing, which concomitantly reduces necessary SME inputs required to achieve desired cook and expansion levels in the products. In accordance with the invention, fully-cooked pet foods can be fabricated with SME inputs of up to about 18 kWhr/T, whereas aquatic feeds can be fabricated with SME inputs of up to about 16 kWhr/T. In preferred forms, the extruder (10) includes specially configured, intermeshed extrusion screws (18, 20) and a plurality of obliquely oriented steam inlets (48, 50), and an upstream, dual-shaft preconditioner (90) is used having individual variable frequency drives (98, 100) which allow infinite variablility in the speed and rotational direction of the preconditioner shafts (94, 96).
摘要:
A composition of a high impact glass fiber reinforced flame-retardant engineering plastic and a method thereof, which the method includes except for glass fiber, from 30% to 60% by weight of a polyamide 6, from 8% to 25% by weight of an acrylonitrile-butadiene-styrene copolymer, from 3% to 6% by weight of a compatilizer, from 4% to 10% by weight of a flexibilizer, from 12% to 16% by weight of a flame retardant, from 0.3% to 0.5% by weight of an antioxidant, and from 0.3% to 0.8% by weight of a lubricant are added into a high-speed mixer, and mixed for 2-5 min, and the blend composition is fed into a twin screw extruder, and from 18% to 30% by weight of a glass fiber are added into the twin screw extruder at the second half stage, and ground together to be granulated and molded.
摘要:
The invention relates to a method for regulating the minimal value of the pressure in the first half of the metering zone in a direction of conveyance in a single-screw degassing extruder or in a cascade extruder during the conveying of a melt consisting of a thermoplastic. The single-screw degassing extruder or the cascade extruder each have a first screw section (13), a degassing zone (14), a metering zone (22), and a measuring control loop (M), which includes a pressure measuring sensor (P) in the first half of the metering zone, a regulator (R) and an actuator (S) for influencing the pressure in the metering zone. The pressure is measured by the pressure measuring sensor (P) and is set by the regulator (R) and the actuator (S) so that the minimal value at the location of measurement ranges from 0.1 to 10 bar.