Dry type granulator tabletting pressure control system and method

A dry granulator and pressure control technology, applied in the direction of presses, material forming presses, manufacturing tools, etc., can solve the problems of inconstant pressure of the rollers, low yield at one time, uneven density, etc., and achieve uniform density. , Good consistency, accurate and reliable control

Inactive Publication Date: 2018-11-20
ZHEJIANG CANAAN TECH
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AI Technical Summary

Problems solved by technology

[0003] This control is an open-loop control. In this control mode, with the unstable change of the amount of feed powder and external pressure, the pressure on the pressing roller is not constant, and the density of the powder after being pressed into tablets is not uniform, the consistency is poor, and the yield at one time is low. Low

Method used

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  • Dry type granulator tabletting pressure control system and method
  • Dry type granulator tabletting pressure control system and method
  • Dry type granulator tabletting pressure control system and method

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Embodiment Construction

[0030] See attached Figure 1~5 , a tablet pressure control system for a dry granulator disclosed in the present invention, comprising a pressure sensor for real-time measurement of the real-time pressure P1 between the pressure rollers,

[0031] Pressure roller gap adjustment servo motor, used to adjust the pressure roller gap, and has the pressure roller initial gap S0 that operates when the equipment is initially started, or \ and feed speed control servo motor, used to adjust the supply of materials entering between the pressure rollers Material speed, and run at the initial feeding speed V0 when the equipment is initially started;

[0032] The enabling module drives the pressure roller gap adjustment servo motor to adjust the pressure roller gap or drives the feeding speed control servo motor to adjust the feeding speed;

[0033] Control module, set the initial gap S0 of the pressure roller, set the initial pressure P0, the initial feeding speed V0, the upper limit of th...

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Abstract

The invention relates to dry type granulator tabletting pressure control system and method. A pressure sensor measures the real-time pressure roller pressure P1; an enabling module drives a pressure roller clearance adjusting servo motor to adjust a pressure roller clearance or drives a feeding speed control servo motor to adjust the feeding speed; a control module sets a pressure roller initial clearance S0, the initial pressure P0, the initial feeding speed V0, an allowable pressure increment upper limit as delta H, a pressure decrement lower limit as delta L, an allowable pressure maximum value as H, and a pressure lower limit value as L; a dynamic pressure different judgment module acquires a dynamic pressure difference delta P; judging the section on which the delta P is located; whenthe delta P is larger than the delta L and is smaller than the delta H, the system runs according to the current feeding speed and the current compression roller clearance; and when the delta P is larger than the delta H and is smaller than the delta L, and the time for maintaining the state exceeds the duration time t0, the pressure roller clearance adjusting servo motor adjusts the pressure roller clearance or drives the feeding speed control servo motor to adjust the feeding speed. The dry type granulator tabletting pressure control system and the method have the advantages of stability and reliability in control.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a control system for automatic adjustment of tablet pressure when powder is extruded into tablets on a dry granulator. Background technique [0002] The pressure control method of the existing dry granulator: the equipment is equipped with a hydraulic station, and the external force is applied to the pressure roller through the hydraulic machine to compress the powder into tablets. In the case of constant external pressure and pressure roller speed, the faster the feeding speed, the greater the pressure on the pressure roller; the smaller the gap, the greater the pressure on the pressure roller. [0003] This control is an open-loop control. In this control mode, with the unstable change of the amount of feed powder and external pressure, the pressure on the pressing roller is not constant, and the density of the powder after being pressed into tablets is not uniform, the consist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B11/00B30B15/14B30B15/26
CPCB30B11/006B30B15/148B30B15/26
Inventor 方正方策孙健钟甲张勇李挺
Owner ZHEJIANG CANAAN TECH
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