CN108621394B - Parameter monitoring method in injection molding process - Google Patents

Parameter monitoring method in injection molding process Download PDF

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Publication number
CN108621394B
CN108621394B CN201810282449.XA CN201810282449A CN108621394B CN 108621394 B CN108621394 B CN 108621394B CN 201810282449 A CN201810282449 A CN 201810282449A CN 108621394 B CN108621394 B CN 108621394B
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injection molding
mold
injection
molding machine
real
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CN201810282449.XA
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CN108621394A (en
Inventor
朱余宏
赵康
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Chuzhou Chenrun Industry And Trade Co ltd
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Chuzhou Chenrun Industry And Trade Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7653Measuring, controlling or regulating mould clamping forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/77Measuring, controlling or regulating of velocity or pressure of moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/78Measuring, controlling or regulating of temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/7604Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/7611Velocity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76531Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76494Controlled parameter
    • B29C2945/76595Velocity

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a parameter monitoring method in an injection molding process, which comprises the following steps: s1, adjusting the injection force of the injection molding machine to enable the real-time flow rate of the melt in the injection molding machine to be within a preset flow rate range; s2, acquiring the real-time injection molding force of the injection molding machine, judging whether the real-time injection molding force of the injection molding machine is larger than a preset injection molding force threshold value, and executing S3 when the judgment result is yes; otherwise, go to S4; s3, heating the injection mold, acquiring the real-time temperature of the injection mold, judging whether the real-time temperature of the injection mold is greater than a preset temperature threshold value, and giving an alarm if the real-time temperature of the injection mold is greater than the preset temperature threshold value; s4, collecting multi-view images of the injection mold, judging whether the injection mold is locked or not according to the multi-view images of the injection mold, and increasing the mold locking force of the injection molding machine when the judgment result is negative; and S5, acquiring the real-time mold locking force of the injection molding machine, judging whether the real-time mold locking force of the injection molding machine is larger than a preset mold locking force threshold value, and giving an alarm notification when the judgment result is yes.

Description

Parameter monitoring method in injection molding process
Technical Field
The invention relates to the technical field of injection molding, in particular to a parameter monitoring method in an injection molding process.
Background
With the increasing abundance of plastic products, the technological requirements for injection molding processing are also continuously increased, and the molding precision of the product can meet the processing requirements only by adjusting injection molding technological parameters of the injection molding machine, such as injection molding force, melt flow rate, mold temperature, mold locking force of the injection molding machine, and the like.
In the production process of the existing injection molding machine, the original process parameters are generally set on the injection molding machine by skilled technicians in a mode of memory, reference or intuition, and the injection molding process parameters are gradually optimized and finely adjusted by the technicians. The treatment mode not only wastes time, labor and materials, but also is difficult to effectively manage the process parameters due to the change of technicians; when the environmental parameters (such as the environmental temperature, the environmental humidity, the environmental air pollution index, etc.) of the production and processing are different, the injection molding process parameters corresponding to the production and processing parameters meeting the processing requirements also change correspondingly, but the changes of the environmental parameters are often ignored by technicians, and the technicians are difficult to visually carry out more accurate quantitative reference on the environmental parameters, so that the judgment of the technicians in the mold testing process is influenced.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a parameter monitoring method in the injection molding process;
the invention provides a parameter monitoring method in an injection molding process, which comprises the following steps:
s1, adjusting the injection force of the injection molding machine to enable the real-time flow rate of the melt in the injection molding machine to be within a preset flow rate range;
s2, acquiring the real-time injection molding force of the injection molding machine, judging whether the real-time injection molding force of the injection molding machine is larger than a preset injection molding force threshold value, and executing S3 when the judgment result is yes; otherwise, go to S4;
s3, heating the injection mold, acquiring the real-time temperature of the injection mold, judging whether the real-time temperature of the injection mold is greater than a preset temperature threshold value, and giving an alarm if the real-time temperature of the injection mold is greater than the preset temperature threshold value;
s4, collecting multi-view images of the injection mold, judging whether the injection mold is locked or not according to the multi-view images of the injection mold, and increasing the mold locking force of the injection molding machine when the judgment result is negative;
and S5, acquiring the real-time mold locking force of the injection molding machine, judging whether the real-time mold locking force of the injection molding machine is larger than a preset mold locking force threshold value, and giving an alarm notification when the judgment result is yes.
Preferably, step S1 specifically includes:
presetting a corresponding relation between injection molding force of an injection molding machine and melt flow rate;
acquiring the real-time flow rate of a melt in an injection molding machine;
and adjusting the injection molding force of the injection molding machine according to the corresponding relation between the injection molding force of the injection molding machine and the melt flow rate, so that the real-time flow rate of the melt in the injection molding machine is within a preset flow rate range.
Preferably, the multi-view image of the injection mold specifically includes: the injection mold comprises an injection mold left view, an injection mold right view, an injection mold front view and an injection mold rear view.
Preferably, step S4 specifically includes:
and judging whether a gap between an upper cover plate and a lower cover plate of the injection mold in any one of the multi-view images of the injection mold is larger than a preset value or not, and judging that the injection mold is not locked when the judgment result is yes, so that the mold locking force of the injection molding machine is increased.
Preferably, in step S3, the issuing of the alarm specifically includes: and sending out sound and light alarm through preset sound and light alarm equipment.
Preferably, in step S5, the sending the alarm notification specifically includes: and sending an alarm notice to the mobile phone of the preset contact.
The injection molding machine acquires the injection molding force, the melt flow rate, the mold temperature and the mold locking force of the injection molding machine in real time, monitors the injection molding process, judges whether the melt temperature is too low or not by monitoring the injection molding force change of the injection molding machine under the condition that the melt flow rate in the injection molding machine is kept within a preset range, heats the mold when judging that the melt temperature is too low, prevents the melt from being solidified in advance and influences injection molding, simultaneously monitors the mold temperature, and when the mold temperature is more than a temperature threshold value, indicates that the injection molding machine breaks down and sends out a safety alarm to inform a worker; secondly, whether the injection mold is locked or not is monitored, the mold locking force of the injection molding machine is increased under the condition that the mold is not locked, the condition that the product quality is influenced due to the fact that the mold is not locked is avoided, the mold locking force of the injection molding machine is monitored, when the mold locking force of the injection molding machine is larger than a mold locking force threshold value, the injection molding machine breaks down, a safety alarm is sent to inform a worker, and then parameters in the injection molding process are automatically monitored and adjusted, so that the quality of injection molding products is improved.
Drawings
FIG. 1 is a schematic flow chart of a parameter monitoring method in an injection molding process according to the present invention.
Detailed Description
Referring to fig. 1, the method for monitoring parameters in an injection molding process provided by the invention comprises the following steps:
step S1, adjusting the injection force of the injection molding machine to enable the real-time flow rate of the melt in the injection molding machine to be within a preset flow rate range, and specifically comprising the following steps:
presetting a corresponding relation between injection molding force of an injection molding machine and melt flow rate;
acquiring the real-time flow rate of a melt in an injection molding machine;
and adjusting the injection molding force of the injection molding machine according to the corresponding relation between the injection molding force of the injection molding machine and the melt flow rate, so that the real-time flow rate of the melt in the injection molding machine is within a preset flow rate range.
In the specific scheme, the injection molding force of the injection molding machine is adjusted according to the corresponding relation between the preset injection molding force of the injection molding machine and the melt flow rate, so that the real-time flow rate of the melt in the injection molding machine is within the preset flow rate range.
Step S2, acquiring the real-time injection molding force of the injection molding machine, judging whether the real-time injection molding force of the injection molding machine is larger than a preset injection molding force threshold value, and executing S3 when the judgment result is yes; otherwise, go to S4;
and step S3, heating the injection mold, acquiring the real-time temperature of the injection mold, judging whether the real-time temperature of the injection mold is greater than a preset temperature threshold value, and sending out an audible and visual alarm through preset audible and visual alarm equipment when the real-time temperature of the injection mold is greater than the preset temperature threshold value.
In the concrete scheme, under the condition of keeping the flow rate of the fusant in the injection molding machine within the preset range, whether the injection molding force of the injection molding machine is larger than the preset injection molding force threshold value is judged, when the judgment result is yes, the temperature of the fusant in the mold is too low, the temperature of the mold is raised at the moment, the fusant is prevented from being solidified in advance to influence injection molding, the temperature of the mold is monitored simultaneously, when the temperature of the mold is larger than the temperature threshold value, the extra temperature rise required by the mold is too high, the injection molding machine is judged to be broken down at the moment, and a safety.
Step S4, collecting the multi-view image of the injection mold, judging whether the injection mold is locked or not according to the multi-view image of the injection mold, and increasing the mold locking force of the injection molding machine when the judgment result is no, and the method specifically comprises the following steps: judging whether a gap between an upper cover plate and a lower cover plate of the injection mold in any one of multi-view images of the injection mold is larger than a preset value, judging that the injection mold is not locked when a judgment result is yes, and increasing the mold locking force of the injection molding machine, wherein the multi-view images of the injection mold comprise: the injection mold comprises an injection mold left view, an injection mold right view, an injection mold front view and an injection mold rear view.
In the specific scheme, the camera is used for acquiring the left view of the injection mold, the right view of the injection module, the front view of the injection mold and the rear view of the injection mold, judging whether a gap between an upper cover plate and a lower cover plate of the injection mold in any view angle image of the left view of the injection mold, the right view of the injection module, the front view of the injection module and the rear view of the injection mold is larger than a preset value or not, and when the judgment result is yes, the injection mold is unlocked, the mold locking force of the injection molding machine is increased at the moment, and the phenomenon that the product quality is influenced by the unlocking of the mold.
And step S5, acquiring the real-time mold locking force of the injection molding machine, judging whether the real-time mold locking force of the injection molding machine is larger than a preset mold locking force threshold value, and sending an alarm notice to a mobile phone of a preset contact person when the real-time mold locking force of the injection molding machine is judged to be larger than the preset mold locking force threshold value.
In the specific scheme, the mold locking force of the injection molding machine is monitored, when the mold locking force of the injection molding machine is larger than a mold locking force threshold value, the injection molding machine is indicated to be in fault, and a safety alarm is sent to inform workers.
The embodiment acquires the injection force, the melt flow rate, the mold temperature and the mold locking force of the injection molding machine in real time, monitors the injection molding process, judges whether the melt temperature is too low or not by monitoring the injection force change of the injection molding machine under the condition of keeping the melt flow rate in the injection molding machine within a preset range, heats the mold when judging that the melt temperature is too low, prevents the melt from being solidified in advance and influences injection molding, simultaneously monitors the mold temperature, and when the mold temperature is more than a temperature threshold value, indicates that the injection molding machine breaks down and sends a safety alarm to inform a worker; secondly, whether the injection mold is locked or not is monitored, the mold locking force of the injection molding machine is increased under the condition that the mold is not locked, the condition that the product quality is influenced due to the fact that the mold is not locked is avoided, the mold locking force of the injection molding machine is monitored, when the mold locking force of the injection molding machine is larger than a mold locking force threshold value, the injection molding machine breaks down, a safety alarm is sent to inform a worker, and then parameters in the injection molding process are automatically monitored and adjusted, so that the quality of injection molding products is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. A method for monitoring parameters in an injection molding process is characterized by comprising the following steps:
s1, adjusting the injection force of the injection molding machine to enable the real-time flow rate of the melt in the injection molding machine to be within a preset flow rate range;
s2, acquiring the real-time injection molding force of the injection molding machine, judging whether the real-time injection molding force of the injection molding machine is larger than a preset injection molding force threshold value, and executing S3 when the judgment result is yes; otherwise, go to S4;
s3, heating the injection mold, acquiring the real-time temperature of the injection mold, judging whether the real-time temperature of the injection mold is greater than a preset temperature threshold value, and giving an alarm if the real-time temperature of the injection mold is greater than the preset temperature threshold value;
s4, collecting multi-view images of the injection mold, judging whether the injection mold is locked or not according to the multi-view images of the injection mold, and increasing the mold locking force of the injection molding machine when the judgment result is negative;
s5, acquiring the real-time mold locking force of the injection molding machine, judging whether the real-time mold locking force of the injection molding machine is larger than a preset mold locking force threshold value, and sending an alarm notification when the judgment result is yes;
in step S4, the multi-view image of the injection mold specifically includes: the injection mold comprises an injection mold left view, an injection mold right view, an injection mold front view and an injection mold rear view.
2. The method for monitoring parameters in the injection molding process according to claim 1, wherein step S1 specifically comprises:
presetting a corresponding relation between injection molding force of an injection molding machine and melt flow rate;
acquiring the real-time flow rate of a melt in an injection molding machine;
and adjusting the injection molding force of the injection molding machine according to the corresponding relation between the injection molding force of the injection molding machine and the melt flow rate, so that the real-time flow rate of the melt in the injection molding machine is within a preset flow rate range.
3. The method for monitoring parameters in the injection molding process according to claim 1, wherein step S4 specifically comprises:
and judging whether a gap between an upper cover plate and a lower cover plate of the injection mold in any one of the multi-view images of the injection mold is larger than a preset value or not, and judging that the injection mold is not locked when the judgment result is yes, so that the mold locking force of the injection molding machine is increased.
4. The method for monitoring parameters in an injection molding process according to claim 1, wherein in step S3, said issuing an alarm specifically comprises: and sending out sound and light alarm through preset sound and light alarm equipment.
5. The method for monitoring parameters in an injection molding process according to claim 1, wherein in step S5, said sending out an alarm notification specifically comprises: and sending an alarm notice to the mobile phone of the preset contact.
CN201810282449.XA 2018-04-02 2018-04-02 Parameter monitoring method in injection molding process Active CN108621394B (en)

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CN113001921B (en) * 2021-02-25 2022-08-19 北京化工大学 Method for setting optimal mold clamping force of toggle rod type mold clamping mechanism
CN115302727B (en) * 2022-10-11 2023-01-17 江苏宝翼通讯科技有限公司 Abnormity alarm analysis method in injection molding process

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JP2887118B2 (en) * 1996-09-27 1999-04-26 株式会社名機製作所 Control method of mold opening / closing speed of injection molding machine
JP2008001028A (en) * 2006-06-23 2008-01-10 Sumitomo Heavy Ind Ltd Method for detecting abnormality of injection molding machine
CN102574319B (en) * 2010-06-25 2014-09-10 日精树脂工业株式会社 Molding method of injection molding machine
JP5742005B2 (en) * 2011-02-16 2015-07-01 宇部興産機械株式会社 Injection molding method for resin molded products
JP6014060B2 (en) * 2014-01-17 2016-10-25 日精樹脂工業株式会社 Control method and apparatus for injection molding machine
CN104484920B (en) * 2014-11-19 2017-08-04 湖南鑫隆模塑科技开发有限公司 It is a kind of can remote monitoring technique and Intelligent Recognition mould open, the method for mode-lock status
CN204295987U (en) * 2014-12-10 2015-04-29 浙江师范大学 A kind of polymer melt pressure monitor system for micro-injection moulding process
CN104589606B (en) * 2015-01-16 2015-10-28 华中科技大学 A kind of injection molding process on-line monitoring method

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Denomination of invention: A parameter monitoring method in injection molding process

Effective date of registration: 20221117

Granted publication date: 20200519

Pledgee: Chuzhou Wandong Rural Commercial Bank Co.,Ltd.

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