JP2013052510A - Injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection molding machine which more flexibly controls the temperature of a member to be heated.SOLUTION: The injection molding machine includes: a heating cylinder 1 divided into a plurality of temperature control zones Z1, Z2, Z3, Z4 to be temperature-controlled; a band heater 30 heating the specific temperature zone Z1 out of the plurality of temperature control zones Z1, Z2, Z3, Z4; and a temperature control section 20 controlling a temperature of a part Z1.5 excluding the predetermined temperature control zone Z1, to a predetermined temperature by the band heater 30.

Description

  The present invention relates to an injection molding machine having a member to be heated.

  Conventionally, an apparatus for controlling the temperature of a heating cylinder in an injection molding machine is known (see, for example, Patent Document 1).

  This apparatus performs a closed loop control by PID control based on temperature data from a temperature sensor attached to each of a plurality of temperature control zones in the heating cylinder, while corresponding to each of the plurality of temperature control zones. Feedback control of the heater.

JP 2006-137119 A

  However, the apparatus described in Patent Document 1 controls the temperature of a specific temperature control zone using a combination of a band heater corresponding to the specific temperature control zone and a temperature sensor corresponding to the specific temperature control zone. . That is, the apparatus described in Patent Document 1 controls each temperature of the plurality of temperature control zones independently. Therefore, there is a problem in that the temperature control of the specific temperature control zone is closed based on only the band heater and the temperature sensor corresponding to the specific temperature control zone, and the responsiveness of the temperature control is limited. .

  In view of the above problems, an object of the present invention is to provide an injection molding machine capable of controlling the temperature of a member to be heated more flexibly.

  In order to achieve the above-described object, an injection molding machine according to an embodiment of the present invention includes a heating cylinder that is divided into a plurality of temperature control zones and controlled in temperature, and a predetermined temperature among the plurality of temperature control zones. It has a heating part which heats a control zone, and a temperature control part which controls the temperature of places other than the predetermined temperature control zone to the predetermined temperature by the heating part.

  By the means described above, the present invention can provide an injection molding machine capable of controlling the temperature of the member to be heated more flexibly.

It is the schematic which shows the structural example of the temperature control system mounted in the injection molding machine which concerns on the Example of this invention. It is a figure which shows an example of the temperature distribution of the heating cylinder temperature-controlled by the temperature control part in the temperature control system of FIG. It is a flowchart which shows the flow of a 1st temperature control process. It is a figure which shows another example of the temperature distribution of the heating cylinder temperature-controlled by the temperature control part in the temperature control system of FIG. It is a flowchart which shows the flow of a 2nd temperature control process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a configuration example of a temperature control system 100 mounted on an injection molding machine according to an embodiment of the present invention. In the present embodiment, the temperature control system 100 measures the temperature of the heating cylinder 1 as a member to be heated with the temperature sensor 4 as the temperature detection unit, and the temperature of the heating cylinder 1 with the band heater 3 as the heating unit. Control.

  The heating cylinder 1 is a member that accommodates a screw (not shown) in a rotatable and axially movable manner. The heating cylinder 1 is mainly composed of a water-cooled cylinder part 10, a first cylindrical part 11, a second cylindrical part 12, and a nozzle part 13. The water-cooled cylinder part 10, the first cylindrical part 11, the second cylindrical part 12, and the nozzle part 13 are all made of metal and can exchange heat with each other. Resin supplied via a hopper (not shown) attached to the water-cooled cylinder part 10 is melted and plasticized in the heating cylinder 1 and fed in the direction of the nozzle part 13 by a screw.

  The temperature control system 100 mainly includes a control unit 2, a band heater 3, and a temperature sensor 4.

  The control unit 2 is a functional element that controls the operation of the temperature control system 100, and is, for example, a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. Specifically, the control unit 2 causes the CPU to execute processing corresponding to the temperature control unit 20 while reading a program corresponding to the temperature control unit 20 from the ROM and expanding the program in the RAM.

  The band heater 3 is an example of a heating unit that heats the heating cylinder 1. In this embodiment, the band heater 3 includes two band heaters 30 and 31 that heat the first cylindrical portion 11 of the heating cylinder 1, one band heater 32 that heats the second cylindrical portion 12, and the nozzle portion 13. One band heater 33 to be heated. The first cylindrical portion 11 of the heating cylinder 1 is disposed near the first zone Z1, which is a temperature control zone heated by the band heater 30 disposed near the water-cooled cylinder 10, and the second cylindrical portion 12. It has the 2nd zone Z2 which is a temperature control zone heated with the band heater 31, and the zone Z1.5 arrange | positioned between the 1st zone Z1 and the 2nd zone Z2. The second cylindrical portion 12 of the heating cylinder 1 constitutes a third zone Z3 that is a temperature control zone heated by the band heater 32. Further, the nozzle portion 13 of the heating cylinder 1 constitutes a fourth zone Z4 that is a temperature control zone heated by the band heater 33. Hereinafter, the band heaters 30 to 33 are referred to as a first zone band heater 30, a second zone band heater 31, a third zone band heater 32, and a fourth zone band heater 33 according to the zone to be heated.

  The band heater 3 operates in accordance with a control signal output from the control unit 2, and switches on and off in accordance with, for example, a PWM (Pulse Width Modulation) signal output from the control unit 2.

  In this way, the heating cylinder 1 is divided into a plurality of temperature control zones Z1, Z2, Z3, and Z4 and temperature controlled.

  The temperature sensor 4 is an example of a temperature detection unit that detects the temperature of the heating cylinder 1, and is composed of, for example, a thermocouple. In this embodiment, the temperature sensor 4 includes a first zone temperature sensor 40 that detects the temperature of the first zone Z1, a 1.5th zone temperature sensor 41 that detects the temperature of the zone Z1.5, and a second zone Z2. A second zone temperature sensor 42 for detecting the temperature of the third zone Z3, a third zone temperature sensor 43 for detecting the temperature of the third zone Z3, and a fourth zone temperature sensor 44 for detecting the temperature of the fourth zone Z4. Further, the temperature sensor 4 repeatedly outputs detection values to the control unit 2 at a predetermined cycle.

  The temperature control unit 20 of the control unit 2 is a functional element that controls the temperature of the heating cylinder 1 to a predetermined set temperature. For example, the band heater 3 is PWM-controlled based on the detection value of the temperature sensor 4.

  FIG. 2 is a diagram showing an example of the temperature distribution of the heating cylinder 1 controlled in temperature by the temperature control unit 20 in the temperature control system 100. Below the schematic diagram of the heating cylinder 1, the distance from the reference point, the temperature, The graph showing the relationship of is shown. In addition, the reference point of the graph is the center point of the water-cooled cylinder 10, and the distance increases from the reference point toward the nozzle portion 13 (left side in the figure).

  For example, the temperature control unit 20 continuously monitors the detection value of the second zone temperature sensor 42, and turns on the second zone band heater 31 when the detection value is lower than the set temperature T1, and the detection value is set. If the temperature exceeds T1, the second zone band heater 31 is turned off. As a result, the temperature control unit 20 controls the temperature of the second zone Z2 to the set temperature T1 by the second zone band heater 31. A method of controlling the temperature of the temperature control zone with the band heater corresponding to the temperature control zone in this way is referred to as a “first temperature control method”. In this case, the temperature control unit 20 increases the duty ratio of the PWM signal to the second zone band heater 31 as the difference between the set temperature T1 and the current detection value (<T1) of the second zone temperature sensor 42 increases. The temperature increase rate may be increased. The same applies to the case where the temperatures of the third zone Z3 and the fourth zone are controlled to the set temperature T1. The set temperature T1 is, for example, the melting point of the resin supplied to the heating cylinder 1.

  Further, the temperature control unit 20 continuously monitors the detection value of the 1.5th zone temperature sensor 41, and when the detection value is lower than the set temperature T1, the first zone band heater 30 is turned on, and the detection value thereof. When the temperature exceeds the set temperature T1, the first zone band heater 30 is turned off. As a result, the temperature control unit 20 controls the temperature of the zone Z1.5 to the set temperature T1 by the first zone band heater 30. A method of controlling the temperature of the temperature control zone with a band heater that does not directly correspond to the temperature control zone is referred to as a “second temperature control method”. In this case, when the temperature of the zone Z1.5 reaches the set temperature T1, the temperature of the first zone Z1 is usually lower than the set temperature T1. This is because the first zone Z1 is in contact with the relatively low-temperature water-cooled cylinder portion 10, and the temperature is less likely to rise compared to the zone Z1.5. However, the temperature of the first zone Z1 when the temperature of the zone Z1.5 reaches the set temperature T1 may be higher than the set temperature T1. Note that “having reached the set temperature” is a concept including a state in which the detection value of the temperature sensor 4 stays within a predetermined temperature range including the set temperature for a predetermined time.

  Thereafter, the temperature control unit 20 sets the temperature detected by the first zone temperature sensor 40 when the temperature of the zone Z1.5 reaches the set temperature T1 as the set temperature T2 of the first zone Z1, and sets the first zone band heater. 30 controls the temperature of the first zone Z1 to the set temperature T2. As described above, after the second temperature control method is executed, the temperature of the temperature control zone is controlled by the band heater corresponding to the temperature control zone using the set temperature newly set in the second temperature control method. Is referred to as a “third temperature control method”. The set temperature T2 of the first zone Z1 is not the temperature itself detected by the first zone temperature sensor 40 when the temperature of the zone Z1.5 reaches the set temperature T1, but the temperature is multiplied by a predetermined coefficient. The temperature may be derived indirectly based on the temperature.

  The reason why the temperature controller 20 adopts the third temperature control method is that the temperature of the zone Z1.5 can be controlled to the set temperature T1 by controlling the temperature of the first zone Z1 to the set temperature T2. is there. Further, when the temperature control unit 20 continues the second temperature control method without switching to the third temperature control method, the temperature of the first zone Z1 rapidly increases due to the cooling of the resin supplied from the hopper or the water cooling cylinder unit 10. This is because the heating of the first zone Z1 when the temperature drops to a low value may cause a delay in the temperature balance of the heating cylinder 1.

  The graph of FIG. 2 shows the temperature distribution (broken line) when the first temperature control method is adopted for all the temperature control zones of the first zone Z1 to the fourth zone Z4, and the second for the zone Z1.5. The temperature distribution (solid line) when the temperature control method is adopted and the third temperature control method is adopted for the first zone Z1 is shown.

  As shown by broken lines in FIG. 2, when the first temperature control method is adopted for all the temperature control zones of the first zone Z1 to the fourth zone Z4, the first zone Z1, the second zone Z2, The third zone Z3 and the fourth zone Z4 are controlled to the set temperature T1, but the temperature of the zone Z1.5 where the corresponding band heater does not exist is not controlled and becomes a temperature higher than the set temperature T1.

  On the other hand, as shown by the solid line in FIG. 2, when the second temperature control method is adopted for the zone Z1.5 and the third temperature control method is adopted for the first zone Z1, Zone Z1 is controlled to set temperature T2, and zone Z1.5 in which no corresponding band heater exists is controlled to set temperature T1. The second zone Z2, the third zone Z3, and the fourth zone Z4 are controlled to the set temperature T1 as in the case indicated by the broken line in FIG.

  In this way, the temperature control system 100 is in a non-controlled state (for example, an overshoot state) in the zone Z1.5 between the first zone Z1 and the second zone Z2 where there is no corresponding band heater. )) Can be avoided.

  Next, the flow of a process in which the temperature control unit 20 controls the temperature of the heating cylinder 1 to a desired state (hereinafter referred to as “first temperature control process”) will be described with reference to FIG. 3. FIG. 3 is a flowchart showing the flow of the first temperature control process. The temperature control unit 20 executes the first temperature control process in response to an operation input from an operator via an input unit (not shown) such as a touch panel, for example.

  First, the temperature control unit 20 starts the temperature control (second temperature control method) of the zone Z1.5 by the first zone band heater 30 (step S1).

  Specifically, the temperature control unit 20 continuously monitors the detection value of the 1.5th zone temperature sensor 41, and when the detection value is lower than the set temperature T1, the first zone band heater 30 is turned on, When the detected value exceeds the set temperature T1, the first zone band heater 30 is turned off.

  Further, the temperature controller 20 controls the temperature of the second zone Z2 by the second zone band heater 31 (first temperature control method), and controls the temperature of the third zone Z3 by the third zone band heater 32 (first temperature control method). ) And temperature control (first temperature control method) of the fourth zone Z4 by the fourth zone band heater 33 is similarly started.

  Thereafter, the temperature controller 20 monitors whether or not the temperature of the zone Z1.5 has reached the set temperature T1 (step S2). The determination that the temperature of the zone Z1.5 has reached the set temperature T1 is made, for example, when a predetermined time has elapsed while the temperature of the zone Z1.5 remains at the set temperature T1. This is to confirm that the temperature of the zone Z1.5 has stably reached the set temperature T1, and despite the fact that the temperature of the zone Z1.5 has only instantaneously reached the set temperature T1, This is to prevent the temperature control method from being switched to the third temperature control method. The set temperature T1 may be a temperature range having a predetermined width.

  When it is determined that the temperature in the zone Z1.5 has not yet reached the set temperature T1 (NO in step S2), the temperature control unit 20 monitors whether the temperature in the zone Z1.5 has reached the set temperature T1. Continue.

  On the other hand, when it is determined that the temperature of the zone Z1.5 has reached the set temperature T1 (YES in step S2), the temperature control unit 20 determines the current temperature of the first zone Z1, that is, the first zone temperature sensor 40. The current detection value is set as the set temperature T2 of the first zone Z1 (step S3).

  Thereafter, the temperature control unit 20 starts temperature control (third temperature control method) of the first zone Z1 by the first zone band heater 30 (step S4).

  Specifically, the temperature control unit 20 continuously monitors the detection value of the first zone temperature sensor 40, and when the detection value is lower than the set temperature T2, the first zone band heater 30 is turned on to detect the detection. When the value exceeds the set temperature T2, the first zone band heater 30 is turned off.

  With the above configuration, the temperature control system 100 uses the first zone band heater 30 corresponding to the first zone Z1 to control the temperature of the zone Z1.5 where there is no corresponding band heater. As a result, the temperature control system 100 can control the temperature of the zone where the corresponding band heater does not exist to a desired temperature, and can control the temperature of the heating cylinder 1 as a member to be heated more flexibly.

  In addition, the temperature control system 100 controls the temperature of the zone Z1.5 to the target temperature T1 using the first zone band heater 30, and then the first time when the temperature of the zone Z1.5 reaches the set temperature T1. The temperature of the zone Z1 is set to the set temperature T2. Then, the temperature control system 100 uses the first zone band heater 30 to control the temperature of the corresponding first zone Z1 to the target temperature T2. As a result, the temperature control system 100 can control the temperature of the zone Z1.5 to the set temperature T1 while controlling the temperature of the first zone Z1 to the set temperature T2 by the first zone band heater 30.

  Further, the temperature control system 100 uses the first zone band heater 30 to control the temperature of the first zone Z1 to the target temperature T2, and then again uses the first zone band heater 30 to change the temperature of the zone Z1.5. May be controlled to the set temperature T1. In this case, the temperature control system 100 repeats the temperature control of the zone Z1.5 and the temperature control of the first zone Z1 in order. As a result, the temperature control system 100 can control the temperature of the first zone Z1 to the set temperature T2 and the temperature of the zone Z1.5 to the set temperature T1 by the first zone band heater 30.

  The temperature control system 100 is a heating unit that heats a predetermined temperature control zone, and controls the temperature of a region between the predetermined temperature control zone and a temperature control zone adjacent thereto. That is, the temperature control system 100 controls the temperature of the zone Z1.5 that is a region between the first zone Z1 and the second zone Z2 by the first zone band heater 30 that heats the first zone Z1. However, the present invention is not limited to this. For example, the temperature control system 100 may be a heating unit that heats a predetermined temperature control zone, and may control the temperature of a region between other temperature control zones.

  Next, another temperature control process (hereinafter referred to as “second temperature control process”) by the temperature control unit 20 will be described with reference to FIG. 4.

  FIG. 4 is a diagram illustrating another example of the temperature distribution of the heating cylinder 1 controlled by the temperature control unit 20 in the temperature control system 100, and corresponds to FIG. FIG. 4 shows a graph representing the relationship between the distance from the reference point and the temperature below the schematic diagram of the heating cylinder 1. As in FIG. 2, the reference point of the graph is the center point of the water-cooled cylinder 10, and the distance increases from the reference point toward the nozzle portion 13 (left side in the figure).

  The temperature control unit 20 controls the temperature of the third zone Z3 to the set temperature T1 by the third zone band heater 32 according to the first temperature control method, and the temperature of the fourth zone Z4 by the fourth zone band heater 33. Is controlled to the set temperature T1.

  By the temperature control described above, the temperature distribution of the heating cylinder 1 becomes the set temperature T1 in each of the third zone Z3 and the fourth zone Z4, as shown by the one-dot chain line in FIG.

  However, for example, in a state where the required heat amount for the heating cylinder 1 exceeds the supply heat amount of the fourth zone band heater 33 due to cycle up or increase in the supply amount of resin, there is a situation where the temperature of the fourth zone Z4 cannot reach the set temperature T1. Can occur.

  Therefore, when the temperature of the fourth zone Z4 stays for a predetermined time while the temperature is lower than the threshold temperature T3, the temperature control unit 20 causes the third zone band heater 32 corresponding to the third zone Z3 adjacent to the fourth zone Z4. The temperature control (second temperature control method) of the fourth zone Z4 is started. This is for controlling the temperature of the fourth zone Z4 to the set temperature T1. The threshold temperature T3 is a temperature for determining whether or not the fourth zone band heater 33 is abnormal. For example, the threshold temperature T3 is a temperature lower than the set temperature T1 by a predetermined temperature.

  Specifically, the temperature control unit 20 continuously monitors the detection value of the fourth zone temperature sensor 44, and turns on the third zone band heater 32 when the detection value is lower than the set temperature T1. The third zone band heater 32 controls the temperature of the fourth zone Z4 to the set temperature T1. In this case, the temperature control unit 20 increases the duty ratio of the PWM signal for the third zone band heater 32 as the difference between the set temperature T1 and the current detected value (<T1) of the fourth zone temperature sensor 44 increases. The temperature increase rate may be increased. Further, the temperature control unit 20 continuously monitors the detection value of the third zone temperature sensor 43, and turns off the third zone band heater 32 when the detection value reaches the threshold temperature T4 (> T1). Also good. Although the temperature of the third zone Z3 has already reached the set temperature T1, the third zone band heater 32 is further turned on to increase the temperature of the fourth zone Z4. This is to prevent the temperature of Z3 from excessively exceeding the set temperature T1.

  The graph of FIG. 4 shows that the temperature of the fourth zone Z4 is controlled by the fourth zone band heater 33 when an abnormality occurs in the fourth zone band heater 33 in addition to the above ideal temperature distribution (dashed line). In other words, the temperature distribution (broken line) when the first temperature control method is adopted for the fourth zone Z4 is shown. Further, the graph of FIG. 4 shows a temperature distribution (solid line) when the temperature of the fourth zone Z4 is controlled by the third zone band heater 32, that is, when the second temperature control method is adopted for the fourth zone Z4. Indicates.

  As shown by the broken line in FIG. 4, when the fourth zone band heater 33 cannot sufficiently heat the fourth zone Z4, the fourth temperature Z The temperature of the zone Z4 changes at a temperature lower than the threshold temperature T3 without reaching the set temperature T1.

  On the other hand, as shown by the solid line in FIG. 4, when the fourth zone band heater 33 cannot sufficiently heat the fourth zone Z4, the second temperature control method is adopted for the fourth zone Z4. While the temperature of the zone Z3 is lower than the threshold temperature T4 (> T1), the temperature of the fourth zone Z4 can be controlled to the set temperature T1.

  In this way, the temperature control system 100 can avoid the temperature non-control state in the temperature control zone due to the abnormality of the corresponding band heater or the like.

  Next, the flow of the second temperature control process will be described with reference to FIG. FIG. 5 is a flowchart showing the flow of the second temperature control process. For example, when the temperature of the fourth zone Z4, that is, the detected value of the fourth zone temperature sensor 44 remains below the threshold temperature T3 for a predetermined time, the temperature control unit 20 executes the second temperature control process. .

  First, the temperature control unit 20 starts the temperature control (second temperature control method) of the fourth zone Z4 by the third zone band heater 32 (step S11).

  Specifically, the temperature control unit 20 continuously monitors the detection value of the fourth zone temperature sensor 44, and turns on the third zone band heater 32 when the detection value is lower than the set temperature T1.

  Thereafter, the temperature controller 20 monitors whether or not the temperature of the fourth zone Z4 has reached the set temperature T1 (step S12). The determination that the temperature of the fourth zone Z4 has reached the set temperature T1 is made, for example, when a predetermined time has passed while the temperature of the fourth zone Z4 remains at the set temperature T1. This is for confirming that the temperature of the fourth zone Z4 has stably reached the set temperature T1. The set temperature T1 may be a temperature range having a predetermined width.

  When it is determined that the temperature of the fourth zone Z4 has not yet reached the set temperature T1 (NO in step S12), the temperature control unit 20 monitors whether or not the temperature of the fourth zone Z4 has reached the set temperature T1. Continue.

  On the other hand, when it is determined that the temperature of the fourth zone Z4 has reached the set temperature T1 (YES in step S12), the temperature control unit 20 determines the current temperature of the third zone Z3, that is, the third zone temperature sensor 43. The current detected value is set to the set temperature T5 (<T4) of the third zone Z3 (step S13). The set temperature T5 of the third zone Z3 is not the temperature itself detected by the third zone temperature sensor 43 when the temperature of the fourth zone Z4 reaches the set temperature T1, but the temperature is multiplied by a predetermined coefficient. The temperature may be derived indirectly based on the temperature.

  Thereafter, the temperature control unit 20 starts temperature control (third temperature control method) of the third zone Z3 by the third zone band heater 32 (step S14).

  Specifically, the temperature control unit 20 continuously monitors the detection value of the third zone temperature sensor 43, and when the detection value is lower than the set temperature T5, turns on the third zone band heater 32 to detect the detection. When the value exceeds the set temperature T5, the third zone band heater 32 is turned off.

  The reason why the temperature control unit 20 adopts the third temperature control method is that it is considered that the temperature of the fourth zone Z4 can be controlled to the set temperature T1 by controlling the temperature of the third zone Z3 to the set temperature T5. is there. However, the temperature controller 20 may continue to adopt the second temperature control method without adopting the third temperature control method even after the temperature of the fourth zone Z4 reaches the set temperature T1. The fourth zone Z4 is directly affected by temperature fluctuations of a mold apparatus (not shown) with which the nozzle portion 13 is in contact, and therefore the temperature is likely to fluctuate compared to the third zone Z3. This is because when the second temperature control method is continuously employed in such a situation, the temperature of the fourth zone Z4, which is relatively easy to change, can be quickly controlled to the set temperature T1. If the second temperature control method is continuously employed, the temperature of the third zone Z3 is not controlled. However, when the temperature of the third zone Z3 reaches the threshold temperature T4, the third zone band heater 32 is turned on. By turning off, it is possible to prevent the temperature of the third zone Z3 from rising excessively.

  With the above configuration, the temperature control system 100 uses the third zone band heater 32 corresponding to the third zone Z3 to control the temperature of the fourth zone Z4 where an abnormality has occurred in the corresponding band heater. As a result, the temperature control system 100 can control the temperature of the zone where the abnormality has occurred in the corresponding band heater to a desired temperature, and can control the temperature of the heating cylinder 1 as a member to be heated more flexibly.

  Further, the temperature control system 100 controls the temperature of the fourth zone Z4 to the target temperature T1 using the third zone band heater 32, and then the third time when the temperature of the fourth zone Z4 reaches the set temperature T1. The temperature of the zone Z3 is set to the set temperature T5. Then, the temperature control system 100 uses the third zone band heater 32 to control the temperature of the corresponding third zone Z3 to the target temperature T5. As a result, the temperature control system 100 can control the temperature of the fourth zone Z4 to the set temperature T1 while controlling the temperature of the third zone Z3 to the set temperature T5 by the third zone band heater 32.

  In addition, the temperature control system 100 uses the third zone band heater 32 to control the temperature of the third zone Z3 to the target temperature T5 and then uses the third zone band heater 32 again to change the temperature of the fourth zone Z4. May be controlled to the set temperature T1. In this case, the temperature control system 100 repeats the temperature control of the fourth zone Z4 and the temperature control of the third zone Z3 in order. As a result, the temperature control system 100 can control the temperature of the third zone Z3 to the set temperature T5 and the temperature of the fourth zone Z4 to the set temperature T1 by the third zone band heater 32.

  The temperature control system 100 is a heating unit that heats a predetermined temperature control zone, and controls the temperature of the temperature control zone adjacent to the predetermined temperature control zone. That is, the temperature control system 100 controls the temperature of the fourth zone Z4 adjacent to the third zone Z3 with the third zone band heater 32 that heats the third zone Z3. However, the present invention is not limited to this. For example, the temperature control system 100 only needs to control the temperature of another temperature control zone with a heating unit that heats a predetermined temperature control zone, and the other temperature control zones are limited to adjacent temperature control zones. Absent.

  The temperature control system 100 may execute the first temperature control process and the second temperature control process simultaneously in parallel.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the above-described embodiment, the temperature control system 100 employs a band heater as a heating unit that heats each zone of the heating cylinder 1, but the heating unit is not limited thereto. For example, the temperature control system 100 may employ a heating device in which a conduit for circulating the heating fluid is arranged around each zone. In this case, the temperature control unit 20 controls the temperature of each zone by adjusting the temperature and flow rate of the heating fluid.

  DESCRIPTION OF SYMBOLS 1 ... Heating cylinder 2 ... Control part 3 ... Band heater 4 ... Temperature sensor 10 ... Water cooling cylinder part 11 ... 1st cylindrical part 12 ... 2nd cylindrical part 13 ... Nozzle part 20 ... temperature control part 30 ... first zone band heater 31 ... second zone band heater 32 ... third zone band heater 33 ... fourth zone band heater 40 ... 1st zone temperature sensor 41 ... 1.5th zone temperature sensor 42 ... 2nd zone temperature sensor 43 ... 3rd zone temperature sensor 44 ... 4th zone temperature sensor 100 ... Temperature control system Z1 ... 1st zone Z2 ... 2nd zone Z3 ... 3rd zone Z4 ... 4th zone

Claims (8)

A heating cylinder divided into a plurality of temperature control zones and controlled in temperature;
A heating unit for heating a predetermined temperature control zone of the plurality of temperature control zones;
A temperature control unit for controlling the temperature of a portion other than the predetermined temperature control zone to a predetermined temperature in the heating unit;
An injection molding machine characterized by comprising: The temperature control unit controls the temperature of a portion other than the predetermined temperature control zone to a predetermined temperature by the heating unit based on a detection value of a temperature detection unit provided in a portion other than the predetermined temperature control zone. ,
The injection molding machine according to claim 1. A place other than the predetermined temperature control zone is a region between the plurality of temperature control zones.
The injection molding machine according to claim 1 or 2, characterized in that. Locations other than the predetermined temperature control zone are other temperature control zones.
The injection molding machine according to claim 1 or 2, characterized in that. The part other than the predetermined temperature control zone is a temperature control zone adjacent to the predetermined temperature control zone.
The injection molding machine according to claim 1 or 2, characterized in that. The temperature control unit controls the temperature of the predetermined temperature control zone by the heating unit after controlling the temperature of a portion other than the predetermined temperature control zone to a predetermined temperature.
The injection molding machine according to any one of claims 1 to 5, wherein The temperature controller is configured such that the temperature of the predetermined temperature control zone when the temperature of the portion other than the predetermined temperature control zone is controlled to a predetermined temperature by the heating unit is set as the set temperature of the predetermined temperature control zone. Control the temperature of a given temperature control zone,
The injection molding machine according to claim 6. The temperature control unit controls the temperature of the part other than the predetermined temperature control zone after controlling the temperature of the predetermined temperature control zone to the set temperature by the heating unit.
The injection molding machine according to claim 7.