KR20090004791A - Metal molding for injection molding apparatus - Google Patents

Abstract

An injection molding machine is provided to perform rapidly setting task at the injection molding machine performed when a mold is changed by using the mold having a storage for storing injection related information, an injection molding machine and the injection related information stored in the storage existing with the mold and to minimize production of inferior goods. An injection molding machine contains mold bodies(110,120) having cavities(130) of a molded product form, a storage(140) storing injection related information for injecting a molding material flown in according to a molding condition, a mold containing a shot counting unit generating a counting pulse in order to manage a total accumulation product allowable number whenever the cavity is opened and closed, an actuator supported in a frame(1) of the injection molding machine and opening and closing the mold, a blow nozzle for injecting the molding material in the cavity of the mold and a control box(500) reading the injection related information and controlling all operation about injection molding according to a set injection program.

Description

Metal mold with self-contained storage element storing injection-related information and injection molding machine employing the mold {Metal molding for injection molding apparatus}

The present invention relates to a mold in which a cavity of a desired product form is formed, and an injection molding machine which loads the mold and performs injection.

Usually, an injection molding machine is known as an apparatus which performs injection using a metal mold. The mold loaded into such an injection molding machine has at least one cavity in the form of a product to be molded therein. By the injection molding operation of the injection molding machine, a molding material such as a thermoplastic resin is filled in a molten state in the cavity of the mold and then solidified by cooling to be produced as an injection product.

When the injection operation is performed for a predetermined time using the mold loaded in the injection molding machine, an injection product such as a cavity shape of the loaded mold may be produced as many as the target number. The injection molding machine then detaches the loaded mold and loads another mold to produce another injection product. In order to perform an injection operation using a newly loaded mold, new molding conditions must be set. Here, the molding conditions may include factors such as melting temperature, weight, filling rate, time, holding pressure, and cooling time and cooling temperature of the molding material as optimum operating conditions for obtaining a high quality injection molded product.

In the related art, since the setting work performed at the time of replacing the mold is dependent on the operator of the injection molding machine, there is a problem that the setting work takes a relatively long time depending on the skill of the operator. In addition, since the trial run must be performed several times until the setting is completed and the production of good products, there are many occurrences of injection defects. In addition, it is difficult to ensure the reliability and precision of the produced injection-molded product when the mold is still used until the mold expiration date or the production allowable number is exceeded.

Moreover, in the case of a company that delivers a mold to a subcontractor and wants to obtain only a limited quantity of injection products with the delivered mold, whether or not injection products of a limited quantity are produced by the subcontractor to secure the reliability of the product. To monitor this comes a management burden.

Therefore, there is a need in the art for a technique that can overcome the above disadvantages and problems.

An object of the present invention is to provide a mold that can overcome the disadvantages and problems of the prior art.

Another object of the present invention is to provide a mold and an injection molding machine employing the mold so that the setting work performed at the time of the replacement of the mold can be made or minimized depending on the operator.

Still another object of the present invention is to provide a mold in which injection related information is stored in a storage device.

Still another object of the present invention is to provide an injection molding machine that performs injection according to injection related information stored in the mold when the injection is performed by loading a mold.

It is still another object of the present invention to provide a mold and an injection molding machine employing the mold, which enable the setting operation of the injection molding to be performed quickly.

Still another object of the present invention is to provide a mold capable of reducing or minimizing the occurrence of defective injections during the setting operation of the injection molding and an injection molding machine employing the mold.

It is still another object of the present invention to provide a mold capable of stopping the use of the mold when the use time of the mold is exceeded or the production allowable number is exceeded, and an injection molding machine employing the mold.

Yet another object of the present invention is to deliver a mold to a subcontractor, and in the case of a company that wants to obtain only a limited quantity of injection products with the delivered mold, the injection product of a limited quantity or more in the subcontractor to secure the reliability of the product. The present invention provides a mold capable of monitoring whether or not it is produced and an injection molding machine employing the mold.

According to an embodiment aspect of the present invention for achieving the above technical problem, an injection molding machine:

Injection-related information for injecting a mold body having a product shape to be molded therein and a molding material which is coupled to a part of the mold body to be present together with the mold body and is introduced into the cavity according to molding conditions And a storage pulse that is installed in a part of the mold body so that the total cumulative product allowance for the product to be molded in the cavity is managed, and generates a counting pulse each time the cavity formed in the mold body is opened and closed. A mold including a short counting part to be formed;

An actuator supported by a frame of an injection molding machine to open and close the mold;

An injection nozzle for injecting the molding material into the cavity of the mold;

It is connected to the storage unit by wire or wirelessly to lead the injection-related information from the storage unit during the injection molding, and has a control box for controlling the overall operation of the injection molding in accordance with the set injection program.

In an embodiment of the present invention, the control box counts the counting pulses and performs stop control of injection production when it is determined that the total cumulative product allowable number of the injection related information has expired.

According to the above-described mold and injection molding machine of the present invention, by using the injection-related information stored in the storage element that is present with the mold, the setting operation in the injection molding machine performed at the time of mold replacement, as well as the occurrence of defective injection This has the effect of minimizing or reducing. In addition, there is an advantage that the total cumulative product allowance for the product to be molded is managed to ensure the reliability and precision of the produced injection products.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings without any intention other than to provide a thorough understanding of the present invention by those skilled in the art.

1 is a structural diagram of a mold including a storage unit according to an embodiment of the present invention. Referring to the drawings, there is shown a schematic cross-sectional structure of a mold 100 installed in an injection molding machine for injection molding. The mold 100 is coupled to a part of the mold body so that the cavity 130 having a product shape to be molded may be present together with the mold bodies 110 and 120 formed therein and the mold bodies 110 and 120. It includes a storage unit 140 for storing the injection-related information for injecting the molding material flowing into the 130 according to the molding conditions. The mold body consists of a stationary mold element 120 secured to an injection molding machine and a slide mold element 110 slidable relative to the stationary mold element 120 to define the cavity. The fixed shaft 112 extending at the edge near the center of the slide mold element 110 is a part fixed to the actuator of the injection molding machine. A buffer part 145 formed between a part of the fixed mold element 120 and the storage part 140 functions to protect the storage part 140 from heat and impact generated in the mold 100. . The injection injection hole 122 formed as a conduit in the fixed mold element 120 serves to deliver the injection fluid that is fluidly supplied during the injection operation to the inside of the cavity 130.

As shown in Figure 1, by forming a storage unit 140 for storing the injection-related information in the mold, the injection molding machine injection of the storage unit 140 when the injection molding the mold 100 Injection can be performed according to the relevant information. Therefore, the setting operation of the injection molding is quick, and the setting operation performed at the time of replacing the mold is not dependent or minimized by the operator.

Here, the injection-related information stored in the storage unit 140, the melting temperature, weight, filling speed, time, pressure, injection speed, injection position, holding pressure, holding time, switching time, cooling time and cooling of the molding material Data includes at least one of the temperature, the total number of injection products, or the total number of cumulative products allowed.

FIG. 2 is an electronic circuit block schematic diagram related to communication between a radio frequency identification (“RFID”) tag and an injection molding machine controller that can be coupled to the mold of FIG. 1. Referring to the figure, the mold 100 is coupled to the RFID tag 141 which serves as an example of the storage unit 140. The injection molding machine may include an RFID reader 200, an interface unit 210, an injection molding machine controller 300, and an input unit 400. The RFID reader 200 reads storage information of the RFID tag 141 applied to the line L2 through an antenna and outputs the stored information to the interface unit 210. The interface unit 210 interfaces the read stored information to the injection molding machine controller 300. The injection molding machine controller 300 responds to the operation data of the input unit 400 applied through the input line L1, controls all operations of the injection molding operation according to a preset program, and the interface unit 210. The control data (C1, C2, ..., Cn) for controlling the setting operation and the injection operation in accordance with the injection-related information applied to the output.

3 is a circuit block diagram of the RFID tag of FIG. 2. Referring to the drawings, an inductor 31, a capacitor 32, a clock 33, a memory 34, a DC 35, an instruction detector 36, an encoder 37, a modulation switch 38, and a modulation algorithm It is shown that circuit blocks comprising 39 constitute an RFID tag. The memory 34 stores the unique ID and the injection related information non-volatile. The memory 34 may include a nonvolatile semiconductor memory device such as an EEPROM, an RFID card, a smart card, or a data communication device. When the memory 34 is accessed in a non-contact manner by the RFID reader, a unique ID and injection related information stored in the memory 34 are provided to the encoder 37 according to a command applied from the command detector 36. do. The injection-related information encoded by the encoder 37 is wirelessly sent to the RFID reader side via a modulation algorithm block 39 and a modulation switch 38 in turn.

4 is a circuit block diagram of the RFID reader of FIG. 2. Referring to the drawings, an oscillator 40, a microcontroller 410, a power amplifier 42, an inductor 43, a capacitor 44, a peak detector 45, and a filtering / amplifying / and shaping portion 46 are included. It can be seen that the circuit blocks that constitute the RFID reader 200. The unique ID and the injection-related information read from the RFID tag 141 are applied through the inductor 43 to peak values through the peak detector 45. The output of the peak detector 45 is filtered, amplified, and waveform-formed by the filtering, amplifying, and shaping section 46 and then applied to the microcontroller 41. The microcontroller 41 is the intrinsic. Data reading ID and injection-related information is applied to the injection molding machine control unit.

The RFID system includes an RFID tag shown in FIG. 3, a reader shown in FIG. 4, a server, and middleware. In this case, the injection molding machine controller 300 may perform a function of the server and the middleware. Four types of frequencies, low frequency (125 to 134.7 KHz), high frequency (13.56 MHz), microwave (UHF), microwave, may be used in the communication between the RFID tag and the reader period. Low frequencies are used at close range and microwaves are relatively less affected by metal.

On the other hand, although the RFID tag itself has a battery, a passive type RFID tag may be used in which the reader provides operating power to the RFID tag through an antenna and the reader receives the RFID data driven by the provided power. Of course.

FIG. 5 is an electronic circuit block schematic diagram related to communication between a memory card and an injection molding machine controller, which may also be coupled to the mold of FIG. 1. Referring to the drawings, a mold 100 is coupled to a memory card 142 serving as an example of the storage 140 and a card reader 150 for reading injection-related information stored in the memory card 142. It is. The injection molding machine may include a USB interface unit 212, an injection molding machine control unit 300, and an input unit 400. The injection related information output from the card reader 150 is applied to the USB interface unit 212 through a line L2. The USB interface unit 212 interfaces the output data of the card reader 150 to the injection molding machine controller 300. The injection molding machine controller 300 responds to the operation data of the input unit 400 applied through the input line L1, controls the overall operation of the injection molding operation according to a preset program, and the USB interface unit 212. The control data (C1, C2, ..., Cn) for controlling the setting operation and the injection operation in accordance with the injection-related information applied to the output.

The characteristic of FIG. 5 is that injection-related information is provided via a wire as compared with the case of FIG. In other words, data transmission from the mold to the injection molding machine is implemented by wire. Also, the memory card 142 and the card reader 150 exist together with the mold 100. The memory card 142 is accessed in a different manner from the RFID tag. Here, access means storing data and reading data together.

FIG. 6 is a schematic diagram illustrating a device example of an injection molding machine to which the mold of FIG. 1 is applied. Referring to FIG. 6, the mold 100, the actuator 20, and the injection nozzle 30 are largely mounted on the frame 1 of the injection molding machine.

The mold 100 is molded into the cavity and coupled to a part of the mold body so that the cavity 130 of the product shape to be molded is formed therein and the mold bodies 110 and 120 formed therein. It includes a storage unit 140 for storing the injection-related information for injecting the material in accordance with the molding conditions.

The actuator 20 is supported by the frame 1 of the injection molding machine to function to open and close the mold 100. In the actuator 20, a slide plate 3 coupled to the shaft 8 extending to the piston 7 inside the clamping cylinder 2 secures the slide mold element 110. In accordance with the reciprocating motion of the piston 7 the sliding mold element 110 has a stroke as indicated by reference A1. The stationary mold element 120 is fixed to a stationary plate 4 fixed on top of the frame 1. Thus, as the fixed mold element 120 is fixed without movement in the injection molding operation and the slide mold element 110 moves to the left and right sides of the drawing as indicated by the reference A1, the mold Opening and closing is performed.

The injection nozzle 30 functions to inject the molding material into the cavity 130 of the mold 100. A moving screw 10 having a moving tip 13 is provided inside the cylinder 5, and the raw resin injected into the hopper 6 is heated by the heater 11 and simultaneously operates the injection prime mover 12. By the action of the moving screw 10 is sent in the direction in which the fixed mold element 120 is installed. Accordingly, plasticized and molten molding material is injected into the cavity 130 through the spray nozzle tip 9. The molding material injected into the cavity 130 is cooled while maintaining a constant pressure. Accordingly, an injection product solidified in the shape of the cavity 130 is produced when the slide mold element 110 is opened and closed.

The control box 500 is wired or wirelessly connected to the storage unit in order to read the injection-related information from the storage unit 140 during injection molding, and performs all operations related to injection molding according to the set injection program. To control. The line L2 is a line corresponding to the line of FIG. 5, and the line L1 is an input line for receiving input data applied through the input unit 400. The control box 500 may include a control panel including a plurality of operation buttons provided on one side. The injection operator can manually enter molding conditions through the control panel before starting the operation.

In the actual molding process, it is virtually impossible to perform injection molding with complete satisfaction of each molding condition. Therefore, generally, together with each molding condition, together with a predetermined tolerance range value that can maintain a certain level or more of quality, and after sensing the molding state through the detection unit during the injection molding in the mold, the detection result is the tolerance range Whether to deviate from the value is determined in the control box 500.

The monitor 510 is connected to the control box 500 to provide various conveniences related to the operator's operation and setting. The monitor 510 may be implemented as a conventional CRT, TFT color LCD, plasma flat panel, and displays numbers, letters, figures, or pictures in black and white or color.

FIG. 7 is a flow chart illustrating an injection operation of the injection molding machine of FIG. 6. Referring to the drawing, the initialization operation in the injection molding operation including the setting operation is performed in step S70. Here, the control box 500, which is often referred to as an injection controller, starts a booting operation by accessing a boot code area stored in a nonvolatile memory such as a flash memory. The stored values of various internal buffers and registers are initialized. After the initialization operation is completed, if it is determined in the setting mode in step S71, the operation of reading the injection-related information from the storage unit 140 of the mold 100 is performed in step S72. The lead operation is via a path as described with reference to FIG. 2 or FIG. 5. In step S73, an operation for setting injection conditions is performed in accordance with the read data. The injection conditions allow the melting temperature, weight, filling speed, time, pressure, injection speed, injection position, packing pressure, packing time, switching time, cooling time and cooling temperature of the molding material, the total number of injection products, or the total cumulative product. In order to set the number, etc., the control box 500 outputs control data C1, C2, ..., Cn for controlling the setting operation and the injection operation according to the injection-related information received from the storage unit. Is implemented. Accordingly, the setting operation of the injection molding is performed automatically by using the injection-related information received from the storage of the mold, so that it is performed quickly, and the occurrence of the injection defective product is reduced or minimized by the immediate and accurate setting.

If it is checked in step S74 that the setting is completed, the injection operation is controlled in step S75. The injection operation includes a conventional injection molding operation of injecting and cooling the molding material and then taking out the molded product. If the injection operation in step S75 is continuously performed, and the number of products produced exceeds the allowable number, this is checked in step S76. Thus, a job stop command is generated in step S77. The release of the operation stop command may be set to be prohibited unless it is a special case. Accordingly, the injection molding operation using the set mold is no longer performed. Therefore, in the case of a company that wants to obtain only a limited number of injection products with the delivered mold, it is possible to prevent the production of more than a limited number of injection products.

8 is a diagram illustrating a map configuration of data storage areas allocated to a storage unit of FIG. 1. It is divided into a permanent storage area (A) and an updateable area (B). In the permanent storage area A for which rewriting is prohibited unless otherwise specified, a tag unique ID storage area AR1, a user ID storage area AR2, a user password storage area AR3, and a mold unique number storage area AR4. , Other storage area AR5 for permanent preservation, and injection-related information storage area AR6.

The updateable area B, which is allowed to be updated, includes a job-related data storage area AR10, a temporary data storage area AR11, a total cumulative number storage area AR12, a temperature data storage area AR13, and other areas ( AR14) may be included. In the total cumulative number storage area AR12, the total number of injection parts produced is updated. The total number of injection parts produced is calculated as (the number of received short count signals-the number of received bad judgment signals) X as the number of cavities in the mold. Value.

According to the mold and the injection molding machine employing the mold as described above, by using the injection-related information stored in the reservoir that exists with the mold, the setting operation performed at the time of mold replacement, as well as the occurrence of defective injection This is minimized or reduced. In addition, there is an advantage that the reliability and precision of the produced injection molded product is guaranteed.

The description in the above embodiments is only given by way of example with reference to the drawings for a more thorough understanding of the present invention, it should not be construed as limiting the present invention. In addition, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the basic principles of the present invention. For example, when the case is different, the type and characteristic of the storage element can be changed, or the method of information read can be changed differently. In addition, as the type of injection molding machine, not only a vertical type injection machine such as a vertical, horizontal, single, slide, or rotary type but also other types of injection molding machines may be applied in various forms to the present invention. In addition, in order to be able to monitor the case of performing the injection molding by setting the mold according to the present invention to another injection molding machine having no interfacing with the mold holder, a piezoelectric element generating an operation power every time the mold is opened and closed. It may be provided with a power generating unit such as, and a short counting unit for generating a counting pulse every time the mold is opened and closed, so that the total number of injection products produced can be updated.

According to the mold and the injection molding machine of the present invention as described above, by using the injection-related information stored in the reservoir that exists with the mold, the setting work performed during the mold replacement is faster, as well as the occurrence of defective injection Or reduced effect. In addition, there is an advantage that the reliability and precision of the produced injection molded product is guaranteed.

1 is a structural diagram of a mold including a storage unit according to an embodiment of the present invention;

FIG. 2 is an electronic circuit block schematic diagram related to communication between an RFID tag and an injection molding machine controller which can be coupled to the mold of FIG.

3 is a circuit block diagram of the RFID tag of FIG.

4 is a circuit block diagram of the RFID reader of FIG.

FIG. 5 is an electronic circuit block schematic diagram related to communication between a memory card and an injection molding machine controller, which can also be coupled to the mold of FIG.

6 is a schematic configuration diagram showing an example of an apparatus of an injection molding machine to which the mold of FIG. 1 is applied.

7 is a flow chart of the injection operation of the injection molding machine of FIG.

FIG. 8 is a map configuration diagram of data storage areas allocated to a storage unit of FIG. 1; FIG.

Claims (9)

In the injection molding machine: Injection-related information for injecting a mold body having a product shape to be molded therein and a molding material which is coupled to a part of the mold body to be present together with the mold body and is introduced into the cavity according to molding conditions And a storage pulse that is installed in a part of the mold body so that the total cumulative product allowance for the product to be molded in the cavity is managed, and generates a counting pulse each time the cavity formed in the mold body is opened and closed. A mold including a short counting part to be formed; An actuator supported by a frame of an injection molding machine to open and close the mold; An injection nozzle for injecting the molding material into the cavity of the mold; It is connected to the storage unit by wire or wirelessly to lead the injection-related information from the storage unit during the injection molding, characterized in that it comprises a control box for controlling the overall operation of the injection molding in accordance with the set injection program Injection molding machine. The injection molding machine as claimed in claim 1, wherein the injection molding machine is any one of vertical, horizontal, single, slide, and rotary type. The method of claim 1, wherein the mold body, A fixed mold element fixed to the injection molding machine; And a mold element slidable relative to the stationary mold element to define the cavity. The method of claim 3, wherein the storage unit includes a nonvolatile memory device that retains memory information even when the power supply is turned off, and the total number of injection products is cumulatively updated in the storage area of the storage unit every time the mold is opened or closed. Injection molding machine characterized in that. The injection molding machine as claimed in claim 3, wherein the storage unit is at least one nonvolatile reservoir selected from an RFID tag or a memory card. According to claim 3, wherein the injection-related information, the melting temperature, weight, filling rate, time, pressure, injection rate, injection position, packing pressure, holding time, switching time, cooling time and cooling temperature, total yarn of the molding material Injection molding machine characterized in that the data containing at least one of the number of production, or the total cumulative production allowable number. The injection molding machine as claimed in claim 6, wherein the control box counts the counting pulses and performs stop control of injection production when it is determined that the total cumulative product allowable number of the injection related information has expired. The injection molding machine as claimed in claim 1, wherein when the storage unit is a memory card, the mold further includes a card reader for accommodating the memory card and reading information of the memory card. The injection molding machine as claimed in claim 1, wherein the mold further includes a buffer protection unit to protect the storage unit from physical shock and heat.

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