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Title:
POWDER FEEDING DEVICE
Document Type and Number:
Japanese Patent JPH11160138
Kind Code:
A
Abstract:

To feed powder at a constant flow rate over a long period with a powder feeding device calculating the powder flow rate via a loss-in-weight system to control the flow rate.

This device 100 is provided with a powder conveyance path 20, a powder conveying vibrator 10, a hopper 30, a powder weight measuring means 40 measuring the weight of the powder P in the hopper 30, a microcomputer system 50 which is a drive control means generating the drive signal and a drive circuit 60 driving the powder conveying vibrator 10 via the drive signal from the microcomputer system 50. The microcomputer system 50 conducts feedback control via a loss-in-weight system for flow rate control during the period when no powder P is supplied to the hopper 30. The microcomputer system 50 generates the drive signal for stationary drive control, based on the drive condition in the feedback control period stored in advance during the period when the powder P is supplied to the hopper 30.


Inventors:
TATEISHI MAMORU
MURAI KATSUMI
Application Number:
JP33185497A
Publication Date:
June 18, 1999
Filing Date:
December 02, 1997
Export Citation:
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Assignee:
AISAN IND
International Classes:
G01G13/16; B65G27/32; B65G65/40; B65G65/44; G01G13/285; (IPC1-7): G01G13/16; B65G27/32; B65G65/40; B65G65/44; G01G13/285
Attorney, Agent or Firm:
Takashi Tomizawa (2 outside)



 
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