Detection control method and device of inner-coating thickness of rotational molding storage tank

Abstract

The invention discloses a detection control method and a device of the inner-coating thickness of a rotational molding storage tank. The detection control device comprises a laser emitting device array, a photovoltaic conversion device CCD array, a processing unit array, an integrated controller and the like. The detection control method includes a first step that a computer simultaneously obtains the wall thicknesses of inner coatings of areas corresponding to different gas nozzles of the storage tank through a multipoint laser thickness measurement device, a second step that the computer receives wall thickness signals, works out real-time average thickness of all the areas, and compares the real-time thickness of the area corresponding to each gas nozzle with the real-time average wall thickness to obtain a difference value, and a third step that each wall thickness difference value signal is converted into a corresponding flow signal through a signal processing module, an electric actuating mechanism of a pipeline corresponding to the flow signal is controlled, the valve opening is adjusted, the gas flow is controlled, the condition of powder fusion of one corresponding area is adjusted, and the wall thickness is indirectly controlled. The detection control method and the device of the inner-coating thickness of the rotational molding storage tank improve the forming condition, improve uniformity of the wall thicknesses and relieve labor intensity.

Description

technical field [0001] The present invention relates to a method for detecting and controlling the thickness of a hollow inner coating, in particular to an online detection and control method and device for the thickness of an inner coating of a storage tank during high-temperature, closed, and dynamic rotation processes such as direct-fired rotomolding, specifically The invention relates to a detection and control method and device for the thickness of the inner cladding layer of a rotomolded storage tank. technical background [0002] Rotational molding is a thermoplastic hollow molding method, that is, the powdered polymer is first placed in the mold quantitatively, and the mold rotates on the bracket and swings back and forth perpendicular to it, and the plastic is under the action of gravity and heat. Melt and adhere to the surface of the mold cavity layer by layer, and make plastic products after cooling and shaping. It can be seen that compared with other processes, ...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing rotomolding thickness detection mainly relies on manual visual inspection to accurately control the uniformity of the wall thickness, and creatively apply the laser thickness gauge to the real-time detection of the wall thickness in the rotomolding process, through Automatically adjust the flow rate of the gas nozzle whose deviation is greater than the corresponding area of ​​the set value to adjust the wall thickness of the molding, that is, the present invention provides a detection device and control method for the thickness of the inner coating of a rotomolded storage tank, and also provides a corresponding complete set of detection device to overcome the disadvantages of prior art

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