The present invention relates to an extruded expanded thermoplastic polyurethane elastomer bead and a preparation method therefor. The bead consists of components of the following parts by weight: 100 parts by weight of a thermoplastic polyurethane elastomer, 0.01-0.5 parts of a foaming nucleating agent, and 0.01-0.2 parts by weight of an antioxidant. The preparation method comprises: mixing materials, then putting the mixture into an extruder for granulation to produce a particle raw material suitable for foaming, finally, putting the particle into a foam extruder, and die foaming then underwater pelletizing, thus obtaining a product bead. The present invention utilizes an extrusion method to prepare expanded thermoplastic polyurethane beads. Control of the working conditions of the foaming process could lead to acquiring an expanded=bead of a controllable density, the cell density evenly distribute. The overall production process is easy to operate. Without any special limit or requirement placed on the equipment, this method is suitable for industrial continuous production.

A nozzle is provided for controlling the flow of extruded material, such as e.g., rubber material, from an extrusion machine. Movable pins are positioned into the path of material flow through an internal cavity. The pins are arranged across the path of flow upstream of the extrusion die. By moving the pins in and out, the flow of material through the cavity can be controlled at different locations across the width of the path of flow to the die. Manual and automatic controls can be provided for determining the position of the pins and thereby controlling the flow.

A method of controlling a slot die comprises, while continuing to pass the extrudate through the fluid flow path and out the applicator slot, changing the position of the actuators with the controller to either increase the cross-directional thickness of the fluid flow path adjacent each of the actuators or substantially close the fluid flow path adjacent the actuators, and after changing the cross-directional thickness of the fluid flow path adjacent each of the actuators, while continuing to pass the extrudate through the fluid flow path and out the applicator slot, repositioning each of the actuators with the controller according to the set of discrete settings to resume operating the slot die with the actuators positioned according to the set of discrete settings.

A metered pump system for hydrocapsule encapsulation is disclosed. In at least one embodiment, a system for hydrocapsule encapsulation includes a nozzle assembly and metered pump for encapsulating discrete droplets of liquid by generating a continuous coating of a polymerizable liquid which is substantially immiscible with the core liquid. The metered pump system is configured to control a stroke length and a pulsation speed to attain constant shear with each pump of water, and a volume of water in each stroke and a speed of the stroke is controlled. In at least one embodiment, the nozzle includes a material feed port, a polymer feed port, a water feed port, and an encapsulated material exit port. In at least one embodiment, the metered pump is configured for use in a hydrocapsule encapsulation system having a pressure control system, a water control system, sparging column, and ultraviolet exposure chamber system.

A method and an apparatus for forming annular doses provides a flow of plasticised material supplied by an extruder which passes through a channel that is first cylindrical and then annular. The material exits from an annular outlet in front of which a cutting element passes that separates an annular dose of material. The dose is deposited on a surface of a capsule having a capacity to adhere to the dose that is greater than the cutting element. The surface and the cutting element are distanced from one another in such a manner that the annular dose remaining adhering to the capsule is detached from the element. Detachment can be promoted by a flow of air.

The invention describes a method for the production and further processing of a film tube (6), in which method a plastic melt is transferred into a cylindrical melt by means of an extrusion die (4), the melt flow is drawn out through an annular gap (5) associated with the extrusion die (4) in order to form the film tube (6), and at least one temperature-controlled volume flow comprising at least one fluid is conducted by means of a temperature control device (8) onto the outer periphery of the film tube (6), wherein the temperature control device (8) is divided into peripheral segments, wherein a volume flow of different magnitude and/or different temperature is produced by means of each peripheral segment such that the temperature control of the film tube (6) differs over the periphery of the film tube, and wherein the film tube (6) is flattened by means of a flattening device (9), the flattening device (9) being rotated in relation to the extrusion die (4). A first volume flow in at least one peripheral segment of the temperature control device (8) differs from the volume flow of other peripheral segments so that at least one thick point (13) is produced on the film tube, wherein the first volume flow is produced by means of adjacent peripheral segments in succession, wherein the first volume flow is produced by means of the corresponding at least one peripheral segment in such a way that the first volume flow is adapted to the rotation of the flattening device (9) such that the at least one thick point (13) assumes substantially the same position in relation to the flattening device (9).

The disclosure generally relates to a solid state non-proportional, adjustable, tapered drawing die and an oriented polymer article formed therefrom. More specifically, embodiments relate to a non-proportional draw die used to produce oriented, dimensionally accurate, symmetric or asymmetric polymer composite profiles having simple profiles or complicated profiles with multiple edges. Moreover, the draw die of the disclosure prevents natural flattening of the edges of the final profile during the solid state die drawing process of the oriented polymer composite.

An acrylic rubber bale excellent in storage stability and processability, a method for producing the same, a rubber mixture obtained by mixing the acrylic rubber bale, and a rubber cross-linked product of the rubber mixture are provided. The acrylic rubber bale according to the present invention includes an acrylic rubber having a reactive group and a weight average molecular weight (Mw) of 100,000 to 5,000,000, wherein an amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and pH is 6 or less.

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.

In a method of manufacturing an object, a filament is fed to an extrusion head. The filament has a semi-crystalline polymeric reinforcement portion and a polymeric matrix portion. The temperature of the filament is raised in the extrusion head above the melting point of the matrix portion but below the melting point of the reinforcement portion so that the matrix portion of the filament melts within the extrusion head, thereby forming a partially molten filament within the extrusion head. The reinforcement portion of the partially molten filament remains in a semi-crystalline state as it is extruded from the extrusion head. Relative movement is generated between the extrusion head and the substrate as the partially molten filament is extruded onto the substrate in order to form an extruded line on the substrate. The matrix portion of the extruded line solidifies after the extruded line has been formed on the substrate.