Shielding jig structure for spraying of mobile phone antennas

Abstract

The invention provides a shielding jig structure for spraying of mobile phone antennas. The shielding jig structure is formed by a fixing plate and a supporting rod. A through hole is formed in the supporting rod, and an insertion-connection column is arranged on the bottom surface of the fixing plate and used in cooperation with the through hole of the supporting rod so that the fixing plate and the supporting rod can be tightly connected. The bottom surface of the fixing plate is further provided with clamping blocks used for fixing spraying equipment, and the upper surface of the fixing plate is provided with clamping grooves used for fixing the mobile phone antennas. The shielding jig structure for spraying of the mobile phone antennas is simple and convenient to use; the mobile phone antennas to be machined can be fixed to the upper surface of the fixing plate and then placed in an assembly line for spraying operation, the mobile phone antennas do not move and components inside the mobile phone antennas cannot be coated at the same time in the spraying process, the mobile phone antennas are effectively protected, machining operation is facilitated, and the structure meets the requirement of large-scale industrial production.

Description

technical field [0001] The invention relates to the production field of mobile phone accessories, in particular to a jig structure for spraying and shielding mobile phone antennas. Background technique [0002] Spraying is a coating method in which spray guns or disc atomizers are dispersed into uniform and fine droplets by means of pressure or centrifugal force and applied to the surface of the object to be coated. [0003] The spraying process can be divided into air spraying, airless spraying, electrostatic spraying and various derived methods of the above basic spraying forms, such as large flow and low pressure atomization spraying, thermal spraying, automatic spraying, multi-group spraying, etc. [0004] The production efficiency of spraying operation is high, suitable for manual operation and industrial automation production, and has a wide range of applications. For example, in the field of mobile phone accessories production and processing, it is the most commonly u...

AI Technical Summary

Problems solved by technology

[0005] During the spraying process, the following technical problems often occur: (1) Pilling: the job site is unclean, and dust is mixed into the paint; after the paint is prepared for too long, the paint and curing agent have produced copolymerized particles; the oil output of the spray gun is too small , the air pressure is too large, the paint atomization is poor or the spray gun is too close to the object surface; (2) vertical flow: excessive thinner makes the paint viscosity too low and loses viscosity; the oil output is too large, too close to the object surface or the spray gun runs Too slow; too much oil per injection, too thick or the interval between resprays is too short; the surface of the object is uneven, especially the streamlined shape is easy to sag; (3) orange peel: too much curing agent, so that the paint film dries too fast The reaction is violent; the spraying air pressure is too high, and the paint film cannot be leveled; The combination of medium water will cause whitening phenomenon; excessive curing agent, spraying too much and too thick at one time; foaming: water in the compressed air is mixed on the paint film, the temperature at the job site is high, and the paint dries too fast; the surface moisture content is high, and the air Humidity; spraying too thick at one time; shrinkage: the primer or intermediate coat is not dry before the topcoat is applied; wrinkling: the drying time is too short or the paint film is too thick; improper selection of curing agent in the primer or putty; primer The putty is not complete; when spraying the topcoat, one gun is too thick, the internal deep agent is not volatilized in time, and the outside is dry and the inside is not dry

[0006] In order to optimize the spraying effect of mobile phone accessories, on the one hand, it is necessary to optimize the spraying process; on the other hand, due to the spraying process of mobile phone accessories, such as mobile phone antennas, the mobile phone antenna needs to be set on the automatic spraying production line, and the conveyor belt passes through the spraying equipment one by one Spraying, during the transmission process, if the antenna of the mobile phone is shifted, the spraying position will be shifted or the spraying effect will be poor

[0007] In addition, during the spraying process of the mobile phone antenna, only the outer surface is processed, and the inner antenna connection wire and other components cannot be sprayed, otherwise the coating will affect the normal use of the mobile phone. Therefore, during the operation, both In order to carry out precise and comprehensive spraying operations on the outer surface of the mobile phone antenna, and to avoid damage to the inner parts of the mobile phone antenna during the operation, it is necessary to develop a new fixture to meet the needs of large-scale industrial production

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