摘要:
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.
摘要:
Disclosed is a cold-water soluble starch and a process for preparing same. Generally, the process comprises providing a hydroxyalkyl starch and applying a shearing force to the starch in an extruder in the presence of moisture, the force and the moisture each being sufficient to gelatinize at least substantially all of the granules of the starch to thereby form a sheared starch. The starch is heated to its gelatinization temperature after the starch has passed partially through the barrel of the extruder, with the moisture being maintained at a level sufficiently high to allow gelatinization but sufficiency low to protect the starch from becoming too sticky to extrude. The extruded starch product thus formed may be used in connection with a number of film-forming, coating, and other applications.
摘要:
A method of manufacturing a pneumatic tire has a winding step of forming a rubber ribbon winding body constructing a tread rubber by spirally winding a rubber ribbon obtained by co-extruding a first rubber and a second rubber which are different in hardness. The first rubber is mainly arranged in a first area by making a cross sectional area ratio of the first rubber greater than that of the second rubber. The second rubber is mainly arranged in a second area by making the cross sectional area ratio of the first rubber smaller than that of the second rubber. A portion in which the cross sectional area ratio of the first rubber becomes smaller by smaller is provided from the first area toward the second area. The rubber ribbon retaining a compound interface is superposed and wound to at least a part of the second area.
摘要:
An extrusion device, in particular for plastic materials comprising: an extrusion head (2) having a nozzle (2a) for ejection of at least one plastic material (M1, M2); a first duct (5) formed in said head (2) for feeding a first plastic material (M1) to said ejection nozzle (2a); a second duct (β) formed in said head (2) for feeding a second plastic material (M2) to said ejection nozzle (2a); and a selection element (8), disposed in the vicinity of said ejection nozzle (2a) and able to be switched between a first operating condition at which it closes the second duct (6) to enable feeding of the first plastic material (M1) through the first duct (5), and a second operating condition at which it closes the first duct (5) to enable feeding of the second plastic material (M2) through the second duct (6).
摘要:
The present invention provides a resin film for a film capacitor making it possible to obtain the excellent heat resistance, materialize a reduction in a size of the film capacitor and an increase in a capacity thereof and satisfy a reduction in a thickness of the film and a high voltage resistance thereof. In a manufacturing method in which an extruding equipment 10 is charged with a molding material 1 to extrude a film 2 for a film capacitor from a T dice 20, in which the above extruded film 2 for a film capacitor is interposed between plural rolls in a receiving device 30 and cooled and in which the above cooled film 2 for a film capacitor is wound on a winding tube 42 of a winding device 40, 100 parts by mass of a polyetherimide resin is blended with 1 to 10 parts by mass of a fluorocarbon resin to prepare the molding material 1; the above molding material 1 is extruded through a filter 50 having apertures 51 which are 0.5 to 6 times or less as large as an average thickness of the film 2 for a film capacitor, which is provided between the extruding equipment 10 and the T dice 20; and a thickness of the film 2 for a film capacitor is controlled to 10 μm or less.
摘要:
A method of manufacturing a guidewire having a discrete length. The method includes the steps of feeding a first end of a corewire into an extrusion device, gripping the first end of the corewire with a gripping apparatus, and extruding a first extrusion material onto an outer surface of the corewire while the gripping apparatus pulls the corewire through the extrusion device to form an extrusion jacket on the outer surface of the corewire. The corewire has a predetermined length corresponding to a length of the guidewire.
摘要:
The present invention provides blowing agent introduction systems and methods for introducing blowing agent into polymeric foam processing systems. The methods may involve introducing one or more doses of blowing agent into polymeric material in an extruder during a plastication period of a molding cycle. Prior to introduction, a dose is confined in an accumulator which, for example, has a volume defined between an inlet valve and an outlet valve. A control system may receive inputs related to system parameters (e.g., pressure of polymeric material in extruder, axial position of screw in barrel, whether screw is rotating, and the like) and based on the inputs coordinates operation of the valves to confine and introduce the blowing agent dose(s). The introduction systems may be used in discontinuous plasticating processes, such as injection molding and blow molding, and can be particularly useful in processes that use precise quantities of blowing agent.
摘要:
The present invention provides blowing agent introduction systems and methods for introducing blowing agent into polymeric foam processing systems. The methods may involve introducing one or more doses of blowing agent into polymeric material in an extruder during a plastication period of a molding cycle. Prior to introduction, a dose is confined in an accumulator which, for example, has a volume defined between an inlet valve and an outlet valve. A control system may receive inputs related to system parameters (e.g., pressure of polymeric material in extruder, axial position of screw in barrel, whether screw is rotating, and the like) and based on the inputs coordinates operation of the valves to confine and introduce the blowing agent dose(s). The introduction systems may be used in discontinuous plasticating processes, such as injection molding and blow molding, and can be particularly useful in processes that use precise quantities of blowing agent.