Resin powder plasticizing sheet separation device

Abstract

The invention discloses a resin powder plasticizing sheet separation device. The resin powder plasticizing sheet separation device comprises a lower grading cylinder, an upper grading cylinder, a feedpipe, a motor, a transmission shaft and a grading impeller. The motor is mounted on the upper grading cylinder, the output port of the feed pipe is arranged under the grading impeller, the upper grading cylinder is provided with a discharge port, the transmission shaft extends downward from the upper grading cylinder into the lower grading cylinder, one end of the transmission shaft is connectedwith the output shaft of the motor, and the other end of the transmission shaft is connected with the grading impeller installed in the lower grading cylinder. The outside of the transmission shaft isconnected with a cooling shaft sleeve in a seal and pivot mode, a cooling fluid input pipe and a cooling fluid output pipe are installed on the cooling shaft sleeve, and a cooling fluid channel is arranged between the cooling shaft sleeve and the transmission shaft. The resin powder plasticizing sheet separation device selects the most reasonable grading wheel taper, grading wheel blade angle andgrading rate by simulating calculation and test of different rotational speeds of grading wheels, grading wheel blades and the grading wheels, low temperature separation is realized, and the formation of new plasticized sheet or wire drawing phenomenon due to overtemperature contact or friction of resin powder is avoided.

Description

technical field [0001] The invention belongs to the technical field of powder classification, and in particular relates to a separation device for resin powder plasticized sheets. Background technique [0002] During the transportation of resin powder, the paste resin powder in the air-powder mixture has a fine particle size and a wide particle size distribution of 0.1-200 μm. Its texture is like talcum powder and has no fluidity; the paste resin has no fixed melting point and a glass transition temperature of 77 ~90℃, 80~85℃ starts to soften, 130℃ becomes viscoelastic state, 160~180℃ starts to change into viscous fluid state, 170℃ starts to decompose, combustible, and the burning material is highly carcinogenic; at the same time, paste resin powder Body flow has static electricity, easy to absorb and bond. [0003] The current resin powder plasticizing sheet separation device, because the resin powder is prone to plasticization or wire drawing due to heat or friction, down...

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Problems solved by technology

[0003] The current resin powder plasticizing sheet separation device, because the resin powder is prone to plasticization or wire drawing due to heat or friction, downstream users will block the pinholes of the injection molding machine or the product will foam; further, the current separation of coarse particles There are still many fine powders mixed in the resin, so it is difficult to continue to improve the classification efficiency. How to avoid plasticization or wire drawing of the resin powder and further improve the separation efficiency has become a technical problem that needs to be solved urgently.

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