A device for inspecting a die coater including a first die, a second die, and a shim formed between the first die and the second die, includes a rail formed to be fixed long on one surface of the first die in a longitudinal direction of the die coater, and at least one sensor assembly configured to move along the rail and inspect a lip or the shim of the die coater, wherein the sensor assembly includes a movable part moving along the rail in the longitudinal direction of the die coater, and a sensor module connected to the movable part, and configured to move in a thickness direction of the die coater and inspect the lip or the shim.

A center-fed single cavity slot die (100) for coating particulate suspensions without creating the coating defect known as center banding. The die has a flow obstruction device (109) located in the die cavity (105) in a position such that the flow obstruction device blocks undisturbed straight-line flow of coating composition from the feed inlet to the die coating slot. Also, a coating process that employs the disclosed coating die. Types, shapes, sizes, and compositions of particles that may be used, and viscoities and particle concentrations of the coating composition which may be used.

There is provided a multi-slot die coater in which a step is formed between rear surfaces of die blocks through a fixing block having a step portion. The fixing block has the step portion of a preset height, and any one die block is coupled to the step portion and the other die block is coupled to the other portion than the step portion, and thus the step is naturally formed between the rear surfaces of the die blocks by the coupling of the die blocks to the fixing block. Thus, it is possible to always maintain the distance of the front ends of the die blocks and the substrate, since the fixing block is fixed between the die blocks, once it is set, the coating gap does not change and is maintained during the process, thereby suppressing the widthwise coating gap deviation.

A multi-slot die coater includes a first slot and a second slot to extrude and coat a coating solution on a surface of a continuously moving substrate through at least one of the first slot or the second slot, and includes a first outer die block; an intermediate die block positioned on the first outer die block such that the first slot is formed between the intermediate die block and the first outer die block; and a second outer die block positioned on the intermediate die block such that the second slot is formed between the second outer die block and the intermediate die block, wherein the die-coater includes contact surfaces between the first outer die block, the intermediate die block and the second die block that are inclined relative to a first plane and a fastener is fastened substantially perpendicular to one of the inclined contact surfaces.

A nozzle assembly includes a first body having an upper and an inner surface; a first channel in the first body to receive a material; a second body having an upper and an inner surface; a second channel in the second body, in liquid communication with the first channel, and configured to receive the material from the first channel; a material outlet defined by the first and second bodies configured to discharge the material; a material inlet on the upper surface of the first body, in liquid communication with the first channel, and configured to receive the material into the nozzle assembly; and an upper lip extending from the first body toward the second body and partly defined by the upper surface of the first body. The upper lip includes a lip surface opposite the upper surface of the first body. The upper surface of the second body is configured to contact the lip surface of the upper lip.

There is provided a multi-slot die coater that is easy to adjust a coating gap and can achieve widthwise deviation control of the coating gap. According to the present disclosure, a step is formed between rear surfaces of die blocks through a fixing block including a step adjustment block. The step adjustment block has a preset thickness, and the step adjustment block is mounted between any one die block and a flat plate-shaped block, and the other die block is coupled to the flat plate-shaped block, and thus the step is naturally formed between the rear surfaces of the die blocks by the coupling of the die blocks to the fixing block including the step adjustment block.

An insulation-coating overlay control system, an electrode plate for a secondary battery, and an insulation-coating overlay control method are provided. I system includes an insulation coater configured to coat an insulating material to allow the insulating material to cover a partial region of a coated part and a non-coated part in an electrode plate along a boundary part. The coated part has an electrode slurry coated thereon and the non-coated part does not have the electrode slurry coated thereon. An insulation-coating width measuring means is configured to measure an overlay width. An insulation coater moving means is configured to move the insulation coater and a controller is configured to control the insulation coater moving means to adjust the overlay width by comparing the measured overlay width with a predetermined overlay width setting range or an overlay width reference value.

A preform coating device is provided with: a rotational holding part that horizontally holds a preform and rotates the preform about the axis of the preform, and that grasps a spout of the preform; a conveyance part that conveys the preform by moving the rotational holding part; a dispenser that discharges a coating liquid toward the preform; a preform support part that supports the bottom-side end of the cylindrical barrel of the preform while the dispenser is discharging the coating liquid; and a spout support part that supports the outer circumferential surface of the spout of the preform while the dispenser is discharging the coating liquid.

A system for manufacturing a positive electrode for a secondary battery includes an unwinder wound with a positive electrode base material, a first coating unit for coating an insulating material at predetermined positions about widthwise edges of the base material with respect to a transfer direction of the base material supplied from the unwinder, a first drying furnace for drying the insulating material by heating the base material coated with the insulating material, a second coating unit for coating a positive electrode slurry on the base material supplied from the first drying furnace in a region between the insulating material formed at both sides of the base material, and a second drying furnace for heating and drying the base material coated with the insulating material and the positive electrode slurry.

A coating die includes a manifold, a supply port, a discharge port, a supply passage, and a discharge passage. The manifold, the discharge passage, and the discharge port are longer in a first direction, and an outline of the manifold viewed from a second direction includes a first outline part to which the discharge passage is connected and also includes a second outline part located opposite the first outline part. The second outline part includes a first taper part tilted to be closer to the first outline part toward an end of the manifold. When the dimension in the first direction from a connection part at which the supply passage is connected in the manifold to the end is set to 1, dimension ratio of the first taper part in the first direction is 0.4 or less.