Temperature control method for material barrel of precision injection molding machine

A technology of barrel temperature and control method, applied in the field of temperature control, can solve the problems of long time and waste the production time of manufacturers, and achieve the effect of sacrificing time efficiency, high control precision, and simple and fast control process

Active Publication Date: 2020-05-15
宁波伊士通技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature change is a slow process, the debugging of a set of control parameters (PID control parameters) takes a long time; therefore, this scheme of manually adjusting the PID control parameters has the disadvantage of wasting the manufacturer's production time

Method used

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  • Temperature control method for material barrel of precision injection molding machine
  • Temperature control method for material barrel of precision injection molding machine
  • Temperature control method for material barrel of precision injection molding machine

Examples

Experimental program
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Embodiment

[0033] Embodiment: a precision injection molding machine cylinder temperature control method, comprising the following steps:

[0034] Step 1. Set a power circle for heating the temperature section and a temperature sensor for collecting the temperature of the temperature section in each temperature section of the barrel of the precision injection molding machine. Each sensor and each power circle are connected with the precision injection molding machine. The controller is connected, and the parameters are set in the controller of the precision injection molding machine to obtain the temperature control cycle and the temperature control cycle. The parameter acquisition temperature control cycle is recorded as Cycle_Time, and the temperature control cycle is recorded as Cycle_Time1. The value of Cycle_Time is 6-13 second, the value of Cycle_Time1 is equal to Cycle_Time, and the maximum heating power of the power circle set at the i-th temperature segment is recorded as u max_i...

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Abstract

The invention discloses a temperature control method for a material barrel of a precision injection molding machine. The method comprises a PID parameter value acquisition stage and a temperature regulation stage. In the PID parameter value acquisition stage, temperature data and time data of each temperature segment are periodically acquired, temperature rise slope of each temperature segment isdetermined, the temperature line of each temperature segment is calculated based on the temperature rise slope and the time data, an intersegment point of the temperature line and an time axis of eachtemperature segment is obtained after the temperature line of each temperature segment is calculated by the mode of the rise slope and coordinate points, the delay time of each temperature segment iscalculated, the determination of the PID parameter value of each temperature segment is realized according to a Ziegler-Nichols method, and after the PID parameter value of each temperature segment is determined and set, the temperature PID regulation and control are carried out at the temperature regulation and control stage. The method has the advantages that PID parameters can be automaticallysolved according to different material barrel objects, the solving process is simple, and the control precision of the solved PID parameters is high.

Description

technical field [0001] The invention relates to a temperature control method, in particular to a precision injection molding machine barrel temperature control method. Background technique [0002] At present, in the industrial field, precision injection molding machines play an irreplaceable role, and the temperature control of precision injection molding machines is an important topic. The temperature control in the precision injection molding machine mainly includes the control of hydraulic oil temperature, mold temperature and barrel temperature. The control method of the hydraulic oil temperature mainly adopts the method of physical cooling - the cooling water can meet the production requirements; the mold has the characteristics of fast heat dissipation, so its temperature control is also relatively easy; the accuracy of the barrel temperature of the precision injection molding machine The quality of the produced product is greatly affected. When the temperature of th...

Claims

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Application Information

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IPC IPC(8): B29C45/78
CPCB29C45/78B29C2945/76531B29C2945/76668B29C2945/76969
Inventor 周拓罗杨马亚萍姚晓华
Owner 宁波伊士通技术股份有限公司
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