A hot dip metal plating bath roll preventing flaws in a steel sheet due to a bath roll, realizing stable running at a high speed, and improving the productivity of a plated steel sheet, which hot dip metal plating bath roll having vertical grooves each formed on an outer circumferential surface of the roll and including two first curved parts projecting to the outside of the roll and at least one second curved part arranged between the two first curved part and projecting to the inside of the roll and horizontal grooves each formed on an outer circumferential surface of the roll along a barrel length direction of the roll, a pitch P.sub.1 (mm) and depth d.sub.1 (mm) of the vertical grooves satisfying 1.0≤P.sub.1≤10, 0.2≤d.sub.1≤5, and d.sub.1≤P.sub.1/2, a depth d.sub.2 (mm) being 60% to 150% of the depth d.sub.1 of the vertical grooves, and a width w.sub.2 (mm) of the horizontal grooves being 2 times or more of the depth d.sub.2 or 2 times or more of a radius of curvature (mm) of curved surfaces forming bottom parts of the horizontal grooves and 0.7 times or less of a pitch P.sub.2 (mm), the pitch P.sub.2 (mm) of the horizontal grooves being 1.0≤P.sub.2≤10.

A method of applying a coating liquid to an optical fiber is described. An optical fiber is drawn through a guide die into a pressurized coating chamber and through the pressurized coating chamber to a sizing die. The pressurized coating chamber contains a coating liquid. The method includes directing coating liquid in a direction transverse to the processing pathway of the optical fiber in the pressurized coating chamber. The transverse flow of coating liquid counteracts detrimental effects associated with gyres that form in the pressurized coating chamber during the draw process. Benefits of the transverse flow include removal of bubbles, reduction in the temperature of the gyre, improved wetting, homogenization of the properties of the coating liquid in the pressurized coating chamber, and stabilization of the meniscus.

A method of applying a coating liquid to an optical fiber is described. An optical fiber is drawn through a guide die into a pressurized coating chamber and through the pressurized coating chamber to a sizing die. The pressurized coating chamber contains a coating liquid. The method includes directing coating liquid in a direction transverse to the processing pathway of the optical fiber in the pressurized coating chamber. The transverse flow of coating liquid counteracts detrimental effects associated with gyres that form in the pressurized coating chamber during the draw process. Benefits of the transverse flow include removal of bubbles, reduction in the temperature of the gyre, improved wetting, homogenization of the properties of the coating liquid in the pressurized coating chamber, and stabilization of the meniscus.

A method of applying a coating liquid to an optical fiber is described. An optical fiber is drawn through a guide die into a pressurized coating chamber and through the pressurized coating chamber to a sizing die. The pressurized coating chamber contains a coating liquid. The method includes directing coating liquid in a direction transverse to the processing pathway of the optical fiber in the pressurized coating chamber. The transverse flow of coating liquid counteracts detrimental effects associated with gyres that form in the pressurized coating chamber during the draw process. Benefits of the transverse flow include removal of bubbles, reduction in the temperature of the gyre, improved wetting, homogenization of the properties of the coating liquid in the pressurized coating chamber, and stabilization of the meniscus.

A method of applying a coating liquid to an optical fiber is described. An optical fiber is drawn through a guide die into a pressurized coating chamber and through the pressurized coating chamber to a sizing die. The pressurized coating chamber contains a coating liquid. The method includes directing coating liquid in a direction transverse to the processing pathway of the optical fiber in the pressurized coating chamber. The transverse flow of coating liquid counteracts detrimental effects associated with gyres that form in the pressurized coating chamber during the draw process. Benefits of the transverse flow include removal of bubbles, reduction in the temperature of the gyre, improved wetting, homogenization of the properties of the coating liquid in the pressurized coating chamber, and stabilization of the meniscus.

What is provided is a novel and improved dross removal device capable of more efficiently collecting a bath surface dross using a dross robot, and a dross removal method.

In order to solve the problem, according to an aspect of the present invention, there is provided a dross removal device including: a dross robot that is configured to collect a bath surface dross present on a bath surface of a coating bath; a dross sensor that is configured to measure an intensity of infrared light from the bath surface of the coating bath; a dross sensor control device that is configured to specify a position of the bath surface dross according to a temporal change amount in the intensity of the infrared light; and a dross robot control device that is configured to cause the dross robot to collect the bath surface dross at the position specified by the dross sensor control device.

A method for manufacturing a high-efficiency protective paper having functions of heat dissipation, heat conduction and electromagnetic absorption is disclosed herein. It comprises the steps of providing a thermal conductive composite to a substrate, wherein the thermal conductive composite is made by fully mixing a metal salt and a nano-scale magnetic metal oxide; evenly distributing the thermal conductive composite over the substrate to form a hybrid material; leveling and rolling the hybrid material to form a protective paper having a dense structure; and receiving and vacuum heating the protective paper.

An automatic processing device of a carbon fiber tube includes a polishing device, a washing device, a first drying device, a printing device, a painting device and a second drying device centrally disposed along an identical axis in sequence to form an automatic production line. The polishing device includes feeding mechanisms disposed on two sides of a frame respectively and a positioning-polishing mechanism disposed between the feeding mechanisms. The printing device includes a supporting mechanism and a rolling-printing mechanism mounted on the frame. The disclosure aims at providing an automatic processing device of a carbon fiber tube and a processing method thereof, combining the polishing device, the printing device and the painting device as a whole. Separate processes such as polishing, printing and painting of the conventional carbon fiber tube are integrated to achieve the automatic production in the production line, which can significantly speed up the schedule.

An alternating pressure melt impregnation device and a melt impregnation method, including having a resin melt squirted from each resin melt runner on an upper die and a lower die of a melt injection area, and thus the squirted resin melt is enable to be squirted directly on an upper surface and a lower surface of a continuous fiber bundle which is entering into an impregnation chamber. Impregnation and infiltration for both surfaces of the continuous fiber bundle are primarily completed by a squirted pressure. The resin melt inside the impregnation chamber flows to a decompression chambers at both sides of the impregnation chamber. When the resin melt flows to a throttle plate, a re-impregnation for the continuous fiber bundle is realized. Then the pressure is decreased and a section of the resin melt is enlarged and a radial flow is generated due to the Barus effect.

The present invention relates to a method for manufacturing an aerogel sheet and comprises: a step (a) of impregnating an acid solution into a fiber sheet to clean the fiber sheet by using the acid solution and impregnating a binder solution into the fiber sheet that is cleaned by using the acid solution to manufacture a pre-processed fiber sheet; a step (b) of impregnating a silica precursor into the pre-processed fiber sheet; and a step (c) of a gelling catalyst into the fiber sheet into which the silica precursor is impregnated to gelate the silica precursor.