KR20140137698A - Injection molder and method for controlling the same - Google Patents

Injection molder and method for controlling the same Download PDF

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Publication number
KR20140137698A
KR20140137698A KR1020130058529A KR20130058529A KR20140137698A KR 20140137698 A KR20140137698 A KR 20140137698A KR 1020130058529 A KR1020130058529 A KR 1020130058529A KR 20130058529 A KR20130058529 A KR 20130058529A KR 20140137698 A KR20140137698 A KR 20140137698A
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KR
South Korea
Prior art keywords
injection
profile
injection process
condition information
process condition
Prior art date
Application number
KR1020130058529A
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Korean (ko)
Inventor
강중근
박광희
이한규
김주호
Original Assignee
삼성전자주식회사
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Priority to KR1020130058529A priority Critical patent/KR20140137698A/en
Publication of KR20140137698A publication Critical patent/KR20140137698A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/766—Measuring, controlling or regulating the setting or resetting of moulding conditions, e.g. before starting a cycle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C2045/7606—Controlling or regulating the display unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76498—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76531—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76929—Controlling method
    • B29C2945/76939—Using stored or historical data sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76929—Controlling method
    • B29C2945/76993—Remote, e.g. LAN, wireless LAN

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

Abstract

The present invention receives and stores a reference profile and reference injection process condition information from another injection molding apparatus and receives a profile of the injection information of the mold in real time while performing an injection process based on the reference profile and reference injection process condition information , Compares the received profile with the reference profile, changes the reference injection process condition information so that the received profile follows the reference profile, and stores the injection process condition information changed to information for use in product mass production when the injection process is completed .
The present invention can produce products of the same quality by keeping the temperature and pressure profiles in the mold the same as the reference profile even in the case of different kinds of injection molding apparatuses and installation environments thereof, thereby reducing defective products.

Description

[0001] Injection molding apparatus and method for controlling the same [0002]

The present invention relates to an injection molding apparatus for molding and producing an article of the same quality in different environments and a control method thereof.

An injection molding machine is a device that molds a solid product by pushing a resin melted by heating in a cylinder into a closed mold through nozzles and cooling it.

Injection molding refers to a molding process in which a thermoplastic resin is heated and fluidized in a heated cylinder at a predetermined temperature and a thermoplastic resin to be heated and fluidized is injected into a mold through an injection ram and pressurized with a plunger.

Such an injection molding apparatus automatically collects molding conditions such as mold temperature and nozzle temperature, injection position and injection pressure, injection time, metering time, process time, metering RPM, and cooling time on a predetermined time basis According to the result, it is possible to determine the abnormality of the sensor, the irregularity of the mold design, the abnormality of the piping and the defective of the heater, and take appropriate measures so that the ideal product level can be secured.

The injection molding apparatus has a problem that products of the same quality can not be obtained depending on the specification, function, and environment of the mass production destination even if the products are molded and manufactured under the same injection process conditions using the same mold.

More specifically, the injection molding process of the injection molding apparatus is composed of about 20 or more, and each injection process condition affects the quality of the product such as the surface quality, weight, electric field, full width. In other words, injection molding is very sensitive to molding conditions when molding products.

For this reason, during the molding process of the product, the injection process is carried out under various injection process conditions to find the injection process conditions in which the product conforms to the final specification. The final approved injection process conditions are then supplied to the mass production center along with the molds and then used in the molding of the product.

However, since the injection molding apparatus of the mass production center is different from the injection molding apparatus at the time of preliminary discharge and the environment is different, even if the injection process conditions approved by the present invention are applied to the injection molding apparatus of the mass production center, There is a problem that the product can not be obtained.

Therefore, there is a problem that it is very troublesome to reset the injection process conditions in the injection molding apparatus of the mass production center, when the product conforming to the specification is formed by using the injection molding apparatus of the mass production center.

In addition, since the injection molding apparatus and the mold gradually become obsolete as mass production is progressed in the mass production center, even if the product is injected under the resetting process conditions over time, .

An injection molding apparatus for obtaining and storing a reference profile for producing a product of a predetermined specification and performing an injection process while changing the injection process condition information based on the stored reference profile and a profile detected in the mold, ≪ / RTI >

An injection molding apparatus according to one aspect includes an injection part for performing an injection process; An input unit for receiving injection process condition information for setting a condition of an injection process; A control unit for controlling the injection unit based on the injection process condition information and receiving a profile of the injection information of the mold from the detection unit installed in the mold during the injection process in real time; And a storage unit that stores the received profile as a reference profile and stores the input injection process condition information as reference injection process condition information.

The profile includes a temperature profile corresponding to the temperature change of the mold during the injection process and a pressure profile corresponding to the pressure change of the mold during the injection process.

The temperature profile and the pressure profile are graphs of curves obtained by real-time injection information detection.

The injection process condition information includes at least one of a resin temperature, a resin injection timing, an injection speed, an injection pressure, and a holding pressure.

An injection molding apparatus according to another aspect of the present invention includes: a storage unit for storing reference profile and reference injection process condition information obtained in another injection molding apparatus; Wherein the control unit controls the injection process based on the reference profile and the reference injection process condition information, receives a profile of the injection information of the mold from the detection unit installed in the mold during the injection process in real time, compares the received profile with the reference profile, A control unit for controlling the injection process while changing the reference injection process condition information so as to follow the reference profile; And an injection unit for performing an injection process based on an instruction of the control unit.

The control unit acquires the injection process condition information in which the received profile is the same as the reference profile, and controls the storage of the obtained injection process condition information.

The control unit controls the injection process and controls the storage of the re-modified injection process condition by receiving the profile from the mold at regular intervals and re-changing the injection process condition information changed so that the profile received at regular intervals follows the reference profile.

The injection process condition information includes at least one of a resin temperature, a resin injection timing, an injection speed, an injection pressure, and a holding pressure.

The control unit changes at predetermined time intervals when the injection process condition information is changed.

The reference profile includes a reference temperature profile and a reference pressure profile and the received profile includes a temperature profile corresponding to the temperature change of the mold during the injection process and a pressure profile corresponding to the pressure change of the mold during the injection process .

The injection molding apparatus further includes an input section for inputting change information of reference injection process information.

The control unit automatically calculates and applies the change information of the reference injection process information for causing the received profile to follow the reference profile.

According to another aspect of the present invention, there is provided a control method of an injection molding apparatus, comprising: receiving a reference profile and reference injection process condition information from another injection molding apparatus;

A reference profile, and a reference injection process condition information, while receiving the profile of the injection information of the mold in real time while comparing the received profile with the reference profile, Changes the condition information, and stores the injection process condition information changed to information for use in mass production of the product when the injection process is completed.

Changing the reference injection process condition information so that the received profile follows the reference profile may include comparing the received profile with a reference profile to identify a time when the received profile differs from the reference profile, And re-executing the injection process.

Storing the modified injection process condition information based on the received profile includes performing at a constant cycle.

According to one aspect, by maintaining the profile of the temperature and pressure in the mold at the same level as the reference profile even when the type of the injection molding apparatus and the installation environment thereof are different from each other, it is possible to produce products of the same quality, .

Further, after the mold is transferred to the mass production center, it is possible to shorten the time required to obtain the injection molding conditions for producing products of the same quality in the injection molding apparatus of the mass production center.

Also, by continuously monitoring the temperature and pressure profile in the mold, it is possible to prevent the quality deviation from being caused by the injection molding apparatus and the die aging.

In addition, the efficiency of the injection molding process can be improved by controlling the injection process conditions automatically in conjunction with the injection molding apparatus.

1 is a configuration diagram of an injection molding management system provided with an injection molding apparatus according to an embodiment.
2 is a detailed configuration diagram of a first injection molding management system provided with a first injection molding apparatus according to the embodiment.
3 is a detailed configuration diagram of a second injection molding management system provided with a second injection molding apparatus according to the embodiment.
Figure 4

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a detailed configuration diagram of a first injection molding management system provided with a first injection molding apparatus according to an embodiment, and Fig. 3 is a cross-sectional view of the injection molding management system shown in Fig. Fig. 5 is a detailed configuration diagram of a second injection molding management system provided with a second injection molding apparatus according to the embodiment; Fig.

As shown in Fig. 1, the injection molding management system is provided in mass production centers for mass production of products and products for the first time, and mass production centers for mass production other than the first mass production centers, respectively. The first injection molding management system 1 provided in the first mass production center A1 and the second injection molding management system 2 provided in the second mass production center A2, .

The first injection molding management system (A1) is a mass production center for performing previewing, the second mass production center (A2) is a mass production center for mass production of products on the basis of a public appearance, The second injection molding management system 2 acquires the standard injection molding process condition information for molding and manufacturing a product meeting predetermined specifications through the injection molding process and the second injection molding management system 2 acquires the reference injection molding process condition information Molding and monitoring the injection process.

The first injection molding management system 1 and the second injection molding management system 2 each include a mold 100 and an injection molding device respectively, and the injection molding device includes an injection part and a monitoring part, respectively.

First, the first injection molding management system 1 includes a mold 100 and a first injection molding apparatus 200.

The mold 100 includes a variable portion and a fixing portion, and forms a cavity corresponding to the shape of the molded product in a state where the variable portion and the fixing portion are combined. In either one of the variable portion and the fixed portion, a gas supply and an exhaust passage communicating with the cavity are formed.

The mold further includes a gas supply line and an exhaust line which are formed so as to communicate with the cavity. Even when the molten resin is completely injected and filled in the cavity, the pressure is continuously applied to the molten resin at the set pressure or more until the molten resin solidifies To the gas line.

The mold further includes a hydraulic pressure portion and a gas supply / exhaust portion.

Here, the hydraulic pressurizing unit applies the hydraulic pressure discharged from the hydraulic pump to the variable portion of the mold so that the variable portion of the mold is coupled to the stationary portion.

The gas supply and exhaust unit supplies the gas in the gas storage tank into the cavity of the mold at a set pressure or exhausts the gas in the cavity as the molten resin is injected into the cavity.

The mold 100 further includes a detection unit 110 that receives the molten resin from the first injection molding apparatus 200 and detects the internal temperature and pressure in real time during the injection process.

Here, the detection unit 110 may be composed of a single sensor for detecting the temperature and the pressure together, or a plurality of sensors for detecting the temperature and the pressure, respectively.

Further, the detection unit 110 may be disposed at a plurality of positions of the mold to detect the injection information for each position, respectively.

That is, the detecting unit 110 detects the temperature and pressure at at least one position of the mold in real time as injection information during the injection process, and transmits the detected temperature and pressure of the mold to the first monitoring unit 220 in real time.

The molten resin is excellent in physical and chemical properties and moldability, and can be easily mass-produced using a mold. Therefore, it is widely used as a material for various products and parts in various industries as well as various household products.

Resins are made by molding using molds, mostly injection molding or extrusion molding, due to the above material properties.

That is, a pellet, which is a plastic granule as a raw material, is melted in a gel form using electric heat and mechanical frictional heat, and then injected at a high temperature and a high pressure in a mold made into a desired shape to be filled and solidified, Finished product.

The first injection molding apparatus 200 includes a first injection unit 210 and a first monitoring unit 220.

The first injection portion 210 includes a hopper into which the pellets are injected, an injector which melts the pellets injected from the hopper in the form of gel using electric heat and mechanical frictional heat, and transfers the pellets in one direction, And a nozzle for transferring the melted resin to the mold.

The operation of the first injection unit 210 is as follows.

First, when the prepared pellets are poured into a hopper, the injected pellets are melted in the form of gel by electric heat and mechanical frictional heat in the injector, and the melted molten resin is conveyed in the direction of the nozzle inside the injector.

The transferred molten resin is supplied to a cavity inside a mold which is already formed into a desired shape by a nozzle. When the molten resin filled in the cavity of the mold 100 solidifies, the mold is separated. At this time, the resin solidified in the mold 100 is separated, and the separated resin becomes a predetermined specification product.

In this case, the first monitoring unit 220 may change the injection process condition of the first injection unit 210 to perform the previewing process, , And obtains reference injection process condition information that can mold and produce a product of a predetermined specification according to the preview result.

Here, the injection process condition includes at least one of a resin temperature, a resin injection timing, an injection speed, an injection pressure, a holding pressure, and an injection time.

The first monitoring unit 220 acquires the injection information of the mold from the mold 100 at the time of acquiring the reference injection process condition information as a reference profile. Wherein the reference profile is a curve graph of the temperature and pressure of the mold during the injection time during the injection process.

The first monitoring unit 220 includes a first input unit 221, a first control unit 222, a first output unit 223, and a first storage unit 224.

The first input unit 221 receives an injection process command and receives injection process condition information.

When the injection process command is input through the first input unit, the first control unit 222 controls the first injection unit 210 to perform the injection process. The first control unit 222 controls the first injection unit 210 .

For example, the first control unit 222 controls the temperature of the resin in melting the resin based on the input injection process condition information, controls the injection timing of the resin, Speed and injection pressure, and also controls the holding pressure.

The first control unit 222 receives injection information from the mold detection unit 110 during the injection process in real time. Herein, the injection information is a profile of temperature and pressure, a curve graph according to the temperature change during the injection process time, and a graph of the pressure curve change during the injection process time. That is, since the temperature and pressure of the mold are detected in real time, the profile is obtained as a curve graph.

In addition, the injection information of the mold can be received from a plurality of detecting portions arranged for each position of the mold.

When the injection process is completed, the first control unit 222 controls the completion notification of the injection process, and controls the injection process condition information corresponding to the injection process and the output of the profile corresponding to the injection information of the mold.

The first control unit 222 receives temperature and pressure from the detection unit 110 of the mold 100 at regular intervals and outputs the received temperature and pressure And notifies the injection process condition information to change if the received profile differs from the reference profile.

If the received profile differs from the reference profile, the first control unit 222 controls the injection process while changing the reference injection process condition information, and monitors the received profile during the injection process, Obtains the condition information and restores the obtained injection process condition information.

By changing the injection process condition information at regular intervals in the mass production of the product of the predetermined specification, it is possible to prevent the quality of the product from being changed according to the aging of the mold and the first injection unit.

The first output unit 223 outputs the result of the injection process. The output unit 223 includes a display unit.

The first output unit 223 outputs the start and completion of the injection process, and outputs the injection process condition information corresponding to the injection process and the profile corresponding to the injection information of the mold.

The first storage unit 224 stores reference injection process condition information and a reference profile.

The first storage unit 224 stores injection process condition information changed at regular intervals.

The second injection molding management system (2) includes a mold (100) and a second injection molding apparatus (300).

The mold 100 is the same mold as the mold of the first injection molding management system 1 and is a mold provided in the first mass production center A1.

The mold 100 receives the molten resin from the second injection molding apparatus 300 and forms the resin into a product as the injection process is performed.

The mold 100 further includes a detection unit 110 for detecting the internal temperature and pressure in real time during the injection process.

Here, the detection unit 110 may be composed of a single sensor for detecting the temperature and the pressure together, or a plurality of sensors for detecting the temperature and the pressure, respectively.

Further, the detection unit 110 may be disposed at a plurality of positions of the mold to detect the injection information for each position, respectively. The detecting unit 110 is disposed at the same position as the position of the sensor provided in the mold of the first mass production target.

That is, the detecting unit 110 detects the temperature and pressure at at least one position of the mold in real time as injection information during the injection process, and transmits the detected temperature and pressure of the mold to the first monitoring unit 220 in real time.

The structure of the mold is the same as that of the mold of the first mass production part, and a description thereof will be omitted.

The second injection molding apparatus 300 includes a second injection unit 310 and a second monitoring unit 320.

The second injection part 310 includes a hopper into which the pellet is injected, an injector which melts the pellets injected from the hopper in the form of gel using electric heat and mechanical frictional heat, and transfers the pellets in one direction, And a nozzle for transferring the melted resin to the mold.

The second injection portion 310 may be an injection portion having the same specification as the first injection portion 210 and may be an injection portion having a different specification from the first injection portion 210.

The basic operation of the second injection portion 310 is the same as that of the first injection portion 210, and thus description thereof is omitted.

The second injection unit 310 performs an injection process to acquire injection process condition information in order to mass produce the same product as the product formed and molded in the first mass production site before the product is molded and manufactured.

In this case, the second monitoring unit 320 stores the reference injection process condition information and the reference profile provided from the first mass production unit, and performs an injection process suitable for the second injection unit 310 using the stored reference injection process condition information and the stored reference process profile information Obtain condition information.

Herein, the injection process condition information suitable for the second injection section 310 is injection process condition information that can form and manufacture a predetermined specification product, and the injection process conditions include resin temperature, resin injection timing, injection speed, injection pressure, And an injection time.

The reference profile is a graph of the temperature and pressure of the mold during the injection time during the injection process.

The second monitoring unit 320 includes a second input unit 321, a second control unit 322, a second output unit 323, and a second storage unit 324.

The second input unit 321 receives an injection process command through the second injector 310 and receives injection process condition information through the second injector 310.

When the injection process command is input through the second input unit, the second control unit 322 controls the driving of the second injection unit 310 to perform the injection process. The second control unit 322 controls the second injection unit 310 310, receives the profile from the detection unit of the mold during the injection process, compares the received profile with the reference profile, changes the reference injection process condition information according to the comparison result, and controls the injection The second injection unit is controlled.

Here, the comparison of the reference injection process condition information includes a change based on the information obtained from the comparison result of the received profile and the reference profile, or a change based on the information input to the input section.

That is, when the injection process condition information is input through the second input unit during the injection process, the second control unit 322 changes the corresponding information in the reference injection process condition information, and controls the second injection unit 310 And controls the driving.

The second control unit 322 controls the temperature of the resin based on the injection process condition information or injection process condition information that has been automatically changed according to the comparison result during the injection process control and controls the injection timing of the resin, The injection speed and the injection pressure corresponding to the speed and pressure of the resin, and also controls the holding pressure.

Here, the injection timing of the resin is predetermined at predetermined time intervals, and it is possible to change the injection process condition information based on the predetermined time.

The second control unit 322 receives the injection information from the mold detection unit 110 during the injection process in a real-time profile and compares the real-time profile with the reference profile. At this time, the injection control unit 322 determines injection process condition information .

The injection process for obtaining the injection process condition information is performed at least once, and at least one injection process condition information is changed at the time when the received profile differs from the reference profile, or the received profile is changed to the reference profile It is also possible to change the at least one injection process condition information before the time point at which the difference is made, and perform the injection process again.

The injection information of the mold is a temperature and pressure profile, a graph of the temperature change during the injection process time, and a graph of the pressure change during the injection process time.

In addition, the injection information of the mold can be received from a plurality of detecting portions arranged for each position of the mold.

When the injection process is completed, the second control unit 322 controls the completion notification of the injection process, and controls the injection process condition information corresponding to the injection process and the output of the profile corresponding to the injection information of the mold.

The second control unit 322 receives the temperature and the pressure from the detection unit 110 of the mold 100 at regular intervals and compares the reference profile with a profile corresponding to the received temperature and pressure. If the received profile is different from the reference profile, Notify to change process condition information.

If the received profile differs from the reference profile, the second control unit 322 controls the injection process while changing the injection process condition information changed so that the received profile follows the reference profile, and if the profile received during the injection process is a reference profile Obtains the following injection process condition information and restores the obtained injection process condition information.

In this way, it is possible to prevent the quality of the product from being changed according to the aging of the mold 100 and the second injection part 310 by changing the injection process condition information at regular intervals in mass production of the product of the predetermined specification.

The second output unit 323 outputs the result of the injection process. The second output unit 323 includes a display unit.

The second output unit 323 outputs the start and completion of the injection process, and outputs the reference profile and the injection process condition information corresponding to the injection process and the profile corresponding to the injection information of the mold.

The second storage unit 324 stores the reference injection process condition information and the reference profile provided by the first mass production unit and stores the injection process condition information for molding and manufacturing a predetermined specification product using the second injection machine.

The second storage unit 324 stores injection process condition information changed at regular intervals.

4 is a control configuration diagram of the first injection molding apparatus according to the embodiment.

The first injection molding apparatus 200 controls the driving of the first injection unit 210 to perform an injection process 501 when an injection process command is input through the first input unit 221. Here, the injection process is a preview process.

At this time, the first injection molding apparatus 200 performs the injection process while controlling the first injection section 210 based on predetermined injection process condition information or injection process condition information inputted through the first input section.

Here, the injection process condition includes at least one of a resin temperature, a resin injection timing, an injection speed, an injection pressure, a holding pressure, and an injection time. That is, since the quality of the product to be injection-molded through the first injection part is changed by changing the injection process condition, the product of the predetermined specification can be obtained by changing the injection process condition.

 The first injection part 210 of the first injection molding apparatus 200 injects the prepared pellets as a raw material into a hopper and melts the charged pellets in the form of gel using electric heat and mechanical frictional heat from the injector , The melted molten resin is transferred in the direction of the nozzle inside the injector, and the molten resin is supplied to the cavity inside the mold through the nozzle.

The first injection molding apparatus 200 stores the injection process condition information applied to the first injection section 502 while performing the injection process (502).

The mold 100 detects injection information, which is temperature and pressure information of the mold, through the detection unit 110 during the injection process, and transmits the information to the first injection molding apparatus 200.

The first injection molding apparatus 200 receives the profile, which is the injection information of the mold during the injection process, in real time and outputs the received injection information. At this time, it is also possible to output the injection process condition information together.

Here, the profile corresponding to the injection information of the mold is a curve graph for the temperature change of the mold during the injection process time and a curve graph for the pressure change of the mold during the injection process time.

In addition, the injection process time is the time from when the injection process command is input to when the molded product is acquired according to the mold separation.

Next, the first injection molding apparatus 200 judges completion of the injection process (step 504), and notifies the user of the completion of the injection process.

Next, the first injection molding apparatus separates the mold when the molten resin filled in the cavity of the mold 100 solidifies.

At this time, it is tested whether the resin solidified in the mold 100 is separated and the separated resin is molded into a predetermined specification product, and it is judged whether or not the resin is molded into a predetermined specification product. This can be determined by the user.

 The first injection molding apparatus 200 is configured such that when a product molded and injected by the user through the first injection unit is determined to be a product of a predetermined specification and then an information storage command is input through the input unit, A profile of temperature and pressure transferred from the detection unit of the mold during the injection process is acquired (505), and the acquired profile is stored (506) as a reference profile.

The user supplies the reference prophase and the reference forming process condition information stored in the storage together with the mold at different mass production sites.

5 is a control configuration diagram of the second injection molding apparatus according to the embodiment.

The second injection molding apparatus 200 stores (511) the reference profile and the reference injection process condition information provided by the first mass production center.

The second injection portion of the second injection molding apparatus 200 may be the same injection portion as the first injection portion of the first mass production portion. However, considering the environmental conditions of the second mass production portion affect the injection process, The same injection-imparting process is performed to obtain a product of a predetermined specification.

That is, the second injection molding apparatus 200 controls the driving of the second injection unit 310 to perform an injection process (512) when an injection process command is inputted through the second input unit 321.

At this time, the second injection molding apparatus 300 performs the injection process while controlling the second injection section 310 based on predetermined injection process condition information or injection process condition information inputted through the second input section.

Here, the injection process condition includes at least one of a resin temperature, a resin injection timing, an injection speed, an injection pressure, a holding pressure, and an injection time. That is, since the quality of the product to be injection-molded through the first injection part is changed by changing the injection process condition, the product of the predetermined specification can be obtained by changing the injection process condition.

 The second injection part 310 of the second injection molding apparatus 300 injects the prepared pellets as a raw material into a hopper and melts the charged pellets in a gel form using electric heat and mechanical frictional heat from the injector , The melted molten resin is transferred in the direction of the nozzle inside the injector, and the molten resin is supplied to the cavity inside the mold through the nozzle.

The second injection molding apparatus 300 stores the injection process condition information applied to the second injection section while performing the injection process.

Then, the mold 100 detects (513) injection information, which is temperature and pressure information of the mold, through the detection unit 110 during the injection process and transfers the information to the second injection molding apparatus 300.

The second injection molding apparatus 300 acquires (516) the profile by receiving the profile, which is injection information of the mold during the injection process, in real time, and outputs the obtained profile together with the reference profile. At this time, it is also possible to output the injection process condition information together.

Here, the profile corresponding to the injection information of the mold is a curve graph for the temperature change of the mold during the injection process time and a curve graph for the pressure change of the mold during the injection process time.

In addition, the injection process time is the time from when the injection process command is input to when the molded product is acquired according to the mold separation.

If a profile is received from a plurality of detection units, the received profile is classified by position and compared with the same reference profile.

Here, the position is the installation position of the detection unit, and is the installation position in the mold.

The second injection molding apparatus 300 determines whether the injection process is completed (515). If it is determined that the injection process is not completed, the second injection molding apparatus 300 acquires the profile of the mold until the injection process is completed.

The first injection molding apparatus then notifies the user of the completion of the injection process, separates the mold when the molten resin filled in the cavity of the mold 100 solidifies, and separates the molded product from the separated mold.

If it is determined that the injection process is completed, the second injection molding apparatus 300 compares the reference profile with the obtained profile to determine whether the obtained profile is the same as the reference profile 516. If the obtained profile is the same as the reference profile If the determination is YES, the injection process condition information in the injection process is stored (517).

If the second injection molding apparatus 300 determines that the obtained profile is different from the reference profile, the reference injection process condition information is changed 518 and the next injection process is performed.

The second injection molding apparatus 300 repeats the above process until the obtained profile becomes equal to the reference profile.

Also, the second injection molding apparatus 300 can determine the time at which the obtained profile differs from the reference profile, and change the injection process condition information at the determined time.

This will be described with reference to Figs. 6A, 6B, 6C and 6D and Figs. 7A and 7B. In addition, the pressure (bar) profile will be described as an example.

As shown in FIG. 6A, when the injection process is performed based on the injection process condition information of FIG. 7A and the profile obtained (dotted line) is compared with the reference profile (solid line) when the injection process is completed, And judges the resin injection timing adjacent to the judged time point T1. It is assumed that the timing of the reinsertion is determined as the third injection period.

Next, the second injection molding apparatus analyzes the difference between the obtained profile and the reference profile to determine the injection process condition information to be changed, and changes the injection process condition information determined at the determined injection time of the resin. It is assumed that the injection process condition information to be changed at this time is the resin temperature from the third resin injection time to the fourth resin injection time.

In the second injection molding apparatus, the injection process is performed in the same manner as the reference injection process condition information for the first and second periods of injection of the resin, the resin temperature is changed when the third resin injection period is reached, After changing the temperature, the injection process is carried out.

That is, the second injection molding apparatus performs the injection process under the same injection process conditions as before until the determined injection timing of the resin, performs the injection process based on the changed injection process condition information from the determined injection time of the resin, The condition information is stored.

As shown in FIG. 6B, the second injection molding apparatus compares the obtained profile of the mold and the reference profile when the injection process is completed, determines the time at which the obtained profile differs from the reference profile, Determine the timing of adjacent resin injection. It is assumed that the estimated period of importing resin is the fifth injection period.

Next, the second injection molding apparatus analyzes the difference between the obtained profile and the reference profile to determine the injection process condition information to be changed, and changes the injection process condition information determined at the determined injection time of the resin. In this case, it is assumed that the injection process condition information to be changed is the injection speed and the resin temperature at the fifth resin injection timing.

In the second injection molding apparatus, the injection process is performed in the same manner as the injection process condition information changed from the first injection period to the fourth injection period, and the resin temperature and injection speed are changed again at the fifth resin injection period A post-injection process is performed.

That is, the second injection molding apparatus performs the injection process under the same injection process conditions as before until the determined injection timing of the resin, performs the injection process based on the changed injection process condition information from the determined injection time of the resin, The injection process condition information is restored.

As shown in FIG. 6C, the second injection molding apparatus compares the profile of the mold obtained according to the previous injection process with the reference profile, determines the time at which the obtained profile differs from the reference profile, Determine the timing of adjacent resin injection. It is assumed that the timing of the reinsertion is determined as the sixth injection period.

Next, the second injection molding apparatus analyzes the difference between the obtained profile and the reference profile to determine the injection process condition information to be changed, and changes the injection process condition information determined at the determined injection time of the resin. At this time, it is assumed that the injection process condition information to be changed is the holding pressure.

In the second injection molding apparatus, the injection process is performed in the same manner as the re-modified injection process condition information from the first injection period to the fifth injection period, and the injection pressure is changed after the sixth resin injection period. do.

That is, the second injection molding apparatus performs the injection process under the same injection process conditions as before until the determined injection timing of the resin, performs the injection process based on the changed injection process condition information from the determined injection time of the resin, The injection process condition information is restored.

6D, if it is determined that the obtained profile of the mold is the same as the reference profile, the second injection molding apparatus stores the changed injection process condition information as information for forming and manufacturing the predetermined specification product.

That is, the second injection molding apparatus obtains and stores the injection process condition information as shown in FIG. 7B in which the reference injection process information is partially changed.

In addition, the second injection molding apparatus 300 controls the injection process while automatically changing the reference injection process condition information when the obtained profile is compared with the reference profile while comparing the obtained profile with the reference profile in real time, It is also possible to obtain information.

The second injection molding apparatus receives temperature and pressure from the detection unit 110 of the mold 100 at regular intervals, compares the reference profile with a profile corresponding to the received temperature and pressure, and if the received profile differs from the reference profile, The injection process is performed while notifying the process condition information to be changed and by changing the injection process condition information changed so that the received profile follows the reference profile.

In this way, it is possible to prevent the quality of the product from being changed according to the aging of the mold 100 and the second injection part 310 by changing the injection process condition information at regular intervals in mass production of the product of the predetermined specification.

In addition, by monitoring the reference profile and the currently obtained profile automatically in real time, it can improve the overall working environment and work efficiency, as well as drastically reduce product defects.

100: mold 110:
200, 300: Injection molding device

Claims (15)

An injection part for performing an injection process;
An input unit for receiving injection process condition information for setting a condition of the injection process;
A control unit for controlling the injection unit based on the injection process condition information and receiving a profile of injection information of the mold from the detection unit installed in the mold during the injection process in real time;
And a storage unit for storing the received profile as a reference profile and storing the inputted injection process condition information as reference injection process condition information. 2. The method of claim 1,
A temperature profile corresponding to a temperature change of the mold during the injection process,
And a pressure profile corresponding to a pressure change of the mold during the injection process. The method according to claim 1,
Wherein the temperature profile and the pressure profile are graphs of curves obtained by the real-time injection information detection. 2. The injection molding machine according to claim 1,
A resin temperature, a resin injection timing, an injection speed, an injection pressure, and a holding pressure. A storage unit for storing reference profile and reference injection process condition information obtained in another injection molding apparatus;
Wherein the control unit controls the injection process on the basis of the reference profile and the reference injection process condition information, receives a profile of the injection information of the mold from the detection unit installed in the mold during the injection process in real time, compares the received profile with the reference profile A control unit for controlling the injection process while changing the reference injection process condition information so that the received profile follows the reference profile;
And an injection section for performing an injection process based on an instruction from the control section. 6. The apparatus of claim 5,
Obtain injection process condition information in which the received profile is the same as the reference profile, and control the storage of the obtained injection process condition information. 6. The apparatus of claim 5,
An injection control unit for controlling the injection process while re-modifying the modified injection process condition information so that the profile received at the predetermined cycle follows the reference profile at a predetermined cycle and controlling the storage of the re- Molding device. 6. The injection molding machine according to claim 5,
A resin temperature, a resin injection timing, an injection speed, an injection pressure, and a holding pressure. 6. The apparatus of claim 5,
And changing the injection process condition information at predetermined time intervals when changing the injection process condition information. 6. The method of claim 5,
Wherein the reference profile includes a reference temperature profile and a reference pressure profile,
Wherein the received profile includes a temperature profile corresponding to a temperature change of the mold during the injection process and a pressure profile corresponding to a pressure change of the mold during the injection process. 6. The method of claim 5,
And an input unit for receiving change information of the reference injection process information. 6. The apparatus of claim 5,
And automatically calculates and applies the change information of the reference injection process information that causes the received profile to follow the reference profile. The reference profile and reference injection process condition information from other injection molding apparatuses are received and stored,
A profile of the injection information of the mold is received in real time while performing the injection process based on the reference profile and the reference injection process condition information,
Comparing the received profile with a reference profile to change the reference injection process condition information so that the received profile follows the reference profile,
And when the injection process is completed, the changed injection process condition information is stored as information for use in mass production of the product. 14. The method of claim 13, wherein changing the reference injection process condition information such that the received profile follows a reference profile,
Comparing the received profile with a reference profile to determine when the received profile is different from the reference profile,
And re-executing the injection process while changing the reference injection process condition information at the confirmed time point. 14. The method of claim 13, wherein storing the modified injection process condition information based on the received profile comprises:
Wherein the injection molding is performed at regular intervals.
KR1020130058529A 2013-05-23 2013-05-23 Injection molder and method for controlling the same KR20140137698A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112453351A (en) * 2020-11-06 2021-03-09 中信戴卡股份有限公司 Method and system for adjusting technological parameters of die casting machine and storage medium
WO2021091191A1 (en) * 2019-11-08 2021-05-14 엘에스엠트론 주식회사 Artificial intelligence-based injection molding system, and method for creating molding conditions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021091191A1 (en) * 2019-11-08 2021-05-14 엘에스엠트론 주식회사 Artificial intelligence-based injection molding system, and method for creating molding conditions
CN112453351A (en) * 2020-11-06 2021-03-09 中信戴卡股份有限公司 Method and system for adjusting technological parameters of die casting machine and storage medium
CN112453351B (en) * 2020-11-06 2022-03-08 中信戴卡股份有限公司 Method and system for adjusting technological parameters of die casting machine and storage medium

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