TWI620644B - Injection molding machine - Google Patents
Injection molding machine Download PDFInfo
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- TWI620644B TWI620644B TW103129525A TW103129525A TWI620644B TW I620644 B TWI620644 B TW I620644B TW 103129525 A TW103129525 A TW 103129525A TW 103129525 A TW103129525 A TW 103129525A TW I620644 B TWI620644 B TW I620644B
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- switching element
- diode
- converter
- inductor
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000004043 responsiveness Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 37
- 239000007924 injection Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 25
- 230000008569 process Effects 0.000 description 25
- 239000012778 molding material Substances 0.000 description 22
- 238000010586 diagram Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000005429 filling process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
-
- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Inverter Devices (AREA)
Abstract
本發明提供一種響應性良好的射出成形機。本發明的射出成形機具備：轉換器，將從交流電源供應之交流電力轉換成直流電力；DC鏈路，被從前述轉換器供應直流電力；電力供應部，將從前述DC鏈路供應之直流電力進行電力轉換而供應給負載；及升壓電路，將DC鏈路電壓進行升壓。 The present invention provides an injection molding machine with good responsiveness. An injection molding machine of the present invention includes a converter that converts AC power supplied from an AC power source into DC power; a DC link that is supplied with DC power from the converter; and a power supply unit that supplies DC power from the DC link Electric power is supplied to the load through power conversion; and a boost circuit boosts the DC link voltage.
Description
本申請主張基於2013年10月15日申請之日本專利申請第2013-215056號之優先權。該申請的所有內容藉由參閱援用於本說明書中。 This application claims priority based on Japanese Patent Application No. 2013-215056 filed on October 15, 2013. The entire contents of that application are incorporated herein by reference.
本發明係有關一種射出成形機。 The present invention relates to an injection molding machine.
射出成形機具有：用於模具裝置的開閉模及合模之合模馬達、用於向合模狀態的模具裝置內填充成形材料之射出馬達、用於成形材料的計量之計量馬達、及用於從開模狀態的模具裝置頂出成形品之頂出馬達(ejector motor)等(例如參考專利文獻1)。有時在開閉模時使用線性馬達，並在合模時使用電磁鐵。有時在開閉模及合模時使用油壓缸、向該油壓缸供應油壓之油壓泵、及驅動該油壓泵之馬達。 The injection molding machine includes a mold clamping motor for opening and closing the mold and closing the mold device, an injection motor for filling a molding material into the mold device in a mold clamping state, a measurement motor for measuring the molding material, and a An ejector motor or the like of the molded product is ejected from a mold device in a mold opening state (for example, refer to Patent Document 1). Sometimes a linear motor is used when opening and closing the mold, and an electromagnet is used when closing the mold. A hydraulic cylinder, a hydraulic pump that supplies hydraulic pressure to the hydraulic cylinder, and a motor that drives the hydraulic pump may be used during mold opening and closing and mold clamping.
專利文獻1：日本特開第2011-183705號公報 Patent Document 1: Japanese Patent Application Laid-Open No. 2011-183705
以往，當在射出成形機中所具備的電動馬達和電磁鐵 等的負載進行驅動時，對於負載之供應電力可能不足，而使負載的響應性降低。 Conventionally, electric motors and electromagnets used in injection molding machines When such a load is driven, the power supplied to the load may be insufficient, and the responsiveness of the load may be reduced.
本發明係有鑑於上述課題而開發完成者，其目的為提供一種響應性良好的射出成形機。 The present invention has been developed in view of the above-mentioned problems, and an object thereof is to provide an injection molding machine with good responsiveness.
為了解決上述課題，依本發明的一態樣，提供一種射出成形機，係具備：轉換器，將從交流電源供應之交流電力轉換成直流電力；DC鏈路，被從前述轉換器供應直流電力；電力供應部，將從前述DC鏈路供應之直流電力進行電力轉換而供應給負載；及升壓電路，將DC鏈路電壓進行升壓。 In order to solve the above problems, according to an aspect of the present invention, an injection molding machine is provided, which includes a converter that converts AC power supplied from an AC power source into DC power, and a DC link that is supplied with DC power from the converter. A power supply unit that converts the DC power supplied from the DC link to a load and supplies it to a load; and a booster circuit that boosts the DC link voltage.
依本發明的一態樣，能提供一種響應性良好的射出成形機。 According to one aspect of the present invention, it is possible to provide an injection molding machine with good responsiveness.
10‧‧‧射出成形機 10‧‧‧ Injection molding machine
50‧‧‧轉換器 50‧‧‧ converter
51~53‧‧‧交流電源線路 51 ~ 53‧‧‧AC power line
60‧‧‧DC鏈路 60‧‧‧DC link
61‧‧‧高壓側直流電源線路 61‧‧‧High-voltage DC power line
62‧‧‧低壓側直流電源線路 62‧‧‧Low-side DC power line
63‧‧‧DC鏈路電容器 63‧‧‧DC link capacitor
70‧‧‧換流器(電流供應部) 70‧‧‧converter (current supply department)
80‧‧‧升壓電路 80‧‧‧Boost circuit
81‧‧‧轉換器部 81‧‧‧ Converter Department
90‧‧‧升壓部 90‧‧‧Boosting Department
91‧‧‧電感器 91‧‧‧Inductor
92‧‧‧第1開關元件 92‧‧‧The first switching element
93‧‧‧第1二極體 93‧‧‧1st Diode
94‧‧‧第2開關元件 94‧‧‧ 2nd switching element
95‧‧‧第2二極體 95‧‧‧ 2nd Diode
96‧‧‧中間節點 96‧‧‧ intermediate nodes
97‧‧‧電容器 97‧‧‧Capacitor
98‧‧‧供電路徑 98‧‧‧Power supply path
第1圖係表示本發明的第1實施形態之射出成形機之 圖。 Fig. 1 is a diagram showing an injection molding machine according to a first embodiment of the present invention; Illustration.
第2圖係表示本發明的第1實施形態之射出成形機的電路之圖。 Fig. 2 is a diagram showing a circuit of an injection molding machine according to the first embodiment of the present invention.
第3圖係以實線表示本發明的第1實施形態之射出馬達的轉速、射出馬達的轉矩、及DC鏈路電壓的變遷之圖。 FIG. 3 is a diagram showing the rotation speed of the injection motor, the torque of the injection motor, and the change in the DC link voltage with solid lines in the first embodiment of the present invention.
第4圖係表示本發明的第2實施形態之射出成形機的電路之圖。 Fig. 4 is a diagram showing a circuit of an injection molding machine according to a second embodiment of the present invention.
以下，參考附圖對用於實施本發明之方式進行說明，在各附圖中，對於相同或對應之結構附加相同或對應之元件符號，並省略說明。此外，將填充製程中之螺桿的移動方向設為前方，將計量製程中之螺桿的移動方向設為後方，以此來進行說明。 Hereinafter, a mode for implementing the present invention will be described with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same or corresponding component symbols, and the description is omitted. In addition, the moving direction of the screw in the filling process is set forward, and the moving direction of the screw in the weighing process is set backward.
第1圖係表示本發明的第1實施形態之射出成形機之圖。射出成形機10進行如下製程：閉模製程，閉合模具裝置30；合模製程，緊閉模具裝置30；填充製程，向合模狀態的模具裝置30的內部填充液狀的成形材料；保壓製程，對所填充的成形材料施加壓力；冷卻製程，保壓製程後，在模具裝置30內使成形材料硬化；計量製程，計量用於下一個成形品的成形材料；開模製程，打開模具裝 置30；及頂出製程，從開模狀態的模具裝置30頂出成形品。射出成形機10藉由反覆進行這些操作來反覆製造成形品。為了縮短成形週期，計量製程可在冷卻製程期間進行。 Fig. 1 is a view showing an injection molding machine according to a first embodiment of the present invention. The injection molding machine 10 performs the following processes: a closed mold process and a closed mold device 30; a mold clamping process, a tightly closed mold device 30; a filling process, filling the inside of the mold device 30 in a closed state with a liquid molding material; and a holding process To apply pressure to the filled molding material; after the cooling process and the pressing process, the molding material is hardened in the mold device 30; the measurement process is used to measure the molding material for the next molded product; 30; and ejection process, ejecting the molded product from the mold device 30 in the open state. The injection molding machine 10 repeatedly performs these operations to repeatedly manufacture a molded article. To shorten the forming cycle, the metering process can be performed during the cooling process.
射出成形機10例如如第1圖所示，具有框架11、固定壓板12、可動壓板13、後壓板14、繫桿15、肘節機構16、缸體21、螺桿25、合模馬達41、射出馬達42、計量馬達43及頂出馬達44。 The injection molding machine 10 includes, for example, as shown in FIG. 1, a frame 11, a fixed platen 12, a movable platen 13, a rear platen 14, a tie rod 15, a toggle mechanism 16, a cylinder 21, a screw 25, a mold clamping motor 41, and injection. The motor 42, the metering motor 43, and the ejection motor 44.
固定壓板12固定於框架11。固定壓板12上安裝有定模32。 The fixing platen 12 is fixed to the frame 11. A fixed die 32 is mounted on the fixed platen 12.
可動壓板13配設於固定壓板12與後壓板14之間，且沿舖設於框架11之導件17移動自如。可動壓板13上安裝有動模33。定模32及動模33構成模具裝置30。 The movable platen 13 is disposed between the fixed platen 12 and the rear platen 14 and can move freely along the guide 17 laid on the frame 11. A movable mold 33 is mounted on the movable platen 13. The fixed mold 32 and the movable mold 33 constitute a mold device 30.
後壓板14藉由複數根繫桿15與固定壓板12連結。後壓板14相對於框架11沿模開閉方向移動自如。另外，後壓板14亦可固定於框架11，此時，固定壓板12相對於框架11在模開閉方向上移動自如。 The rear platen 14 is connected to the fixed platen 12 by a plurality of tie bars 15. The rear platen 14 can move freely in the mold opening and closing direction with respect to the frame 11. In addition, the rear platen 14 may be fixed to the frame 11. At this time, the fixed platen 12 can move freely in the mold opening and closing direction with respect to the frame 11.
肘節機構16配設於可動壓板13與後壓板14之間。藉由肘節機構16在模開閉方向上伸縮，由此可動壓板13相對於框架11在模開閉方向上移動。 The toggle mechanism 16 is disposed between the movable platen 13 and the rear platen 14. When the toggle mechanism 16 expands and contracts in the mold opening and closing direction, the movable platen 13 moves with respect to the frame 11 in the mold opening and closing direction.
缸體21在後部有成形材料(例如樹脂顆粒)的供應口22。在缸體21的外周安裝有加熱器23。加熱器23將缸體21進行加熱，而使供應給缸體21內部之成形材料熔融。液狀的成形材料從設置於缸體21前端之噴嘴24吐 出。 The cylinder block 21 has a supply port 22 for a molding material (for example, resin pellets) at the rear. A heater 23 is attached to the outer periphery of the cylinder block 21. The heater 23 heats the cylinder block 21 to melt the molding material supplied to the inside of the cylinder block 21. The liquid molding material is discharged from a nozzle 24 provided at the front end of the cylinder 21 Out.
螺桿25配設成在缸體21內旋轉自如且進退自如。螺桿25上形成有螺旋狀的槽26。藉由螺桿25的旋轉，成形材料沿螺旋狀的槽26被送到前方。成形材料在缸體21內前進之同時，逐漸熔融。槽26的深度可恆定，亦可根據位置而不同。 The screw 25 is arranged to rotate freely and move forward and backward in the cylinder 21. A spiral groove 26 is formed in the screw 25. As the screw 25 rotates, the molding material is sent forward along the spiral groove 26. The molding material is gradually melted while advancing in the cylinder block 21. The depth of the groove 26 may be constant or may be different depending on the position.
接著，對射出成形機10的動作進行說明。射出成形機10的動作被控制部45(參考第2圖)控制。控制部45由記憶體等儲存部、及CPU等構成，藉由使CPU執行在儲存部儲存之電腦程式來控制各種動作。 Next, the operation of the injection molding machine 10 will be described. The operation of the injection molding machine 10 is controlled by a control unit 45 (see FIG. 2). The control unit 45 is composed of a storage unit such as a memory and a CPU, and controls various operations by causing the CPU to execute a computer program stored in the storage unit.
在合模製程中，驅動合模馬達41來使肘節機構16動作而使可動壓板13靠近固定壓板12。使動模33抵接於定模32，而將模具裝置30閉合。在閉模製程之後進行合模製程。 During the mold clamping process, the mold clamping motor 41 is driven to operate the toggle mechanism 16 to bring the movable platen 13 close to the fixed platen 12. The movable mold 33 is brought into contact with the fixed mold 32 to close the mold device 30. The mold clamping process is performed after the closed mold process.
合模製程中，進一步驅動合模馬達41來緊閉動模33與定模32。產生與肘節機構16的肘節倍率對應之合模力。合模時在動模33與定模32之間形成模穴空間。 During the mold clamping process, the mold clamping motor 41 is further driven to tightly close the movable mold 33 and the fixed mold 32. A clamping force corresponding to the toggle ratio of the toggle mechanism 16 is generated. When the mold is closed, a cavity space is formed between the movable mold 33 and the fixed mold 32.
在填充製程中，驅動射出馬達42來使螺桿25以設定速度前進，從而將蓄積於螺桿25的前方之成形材料從缸體21的前部填充到模具裝置30內的模穴空間中。若螺桿25前進至既定位置(所謂的V/P切換位置)，則開始保壓製程。另外，亦可在自填充製程開始起之經過時間到達既定時間後，開始保壓製程。螺桿25的設定速度可恆定，亦可根據螺桿位置或經過時間而改變。 In the filling process, the injection motor 42 is driven to advance the screw 25 at a set speed, thereby filling the molding material stored in front of the screw 25 from the front of the cylinder 21 into the cavity space in the mold device 30. When the screw 25 advances to a predetermined position (so-called V / P switching position), the holding process is started. In addition, after the elapsed time from the start of the filling process reaches a predetermined time, the holding process may be started. The setting speed of the screw 25 may be constant or may be changed according to the screw position or the elapsed time.
在保壓製程中，驅動射出馬達42而以設定壓力將螺桿25往前推，藉此來補充模穴空間中因成形材料的冷卻而產生的體積收縮的相應量的成形材料。模穴空間的入口(所謂澆口)被硬化之成形材料所密封，而防止來自模穴空間之成形材料的逆流後，開始冷卻製程。在冷卻製程期間，可進行用於下一個成形品之成形材料的計量之計量製程。螺桿25的設定壓力可恆定，也可根據經過時間等而改變。 During the holding process, the injection motor 42 is driven to push the screw 25 forward with a set pressure, thereby replenishing the corresponding amount of molding material in the cavity space due to the volume shrinkage caused by the cooling of the molding material. The inlet (so-called gate) of the cavity space is sealed by the hardened molding material, and after the backflow of the molding material from the cavity space is prevented, the cooling process is started. During the cooling process, a metering process for measuring the molding material of the next molded product can be performed. The set pressure of the screw 25 may be constant or may be changed according to elapsed time or the like.
在計量製程中，將計量馬達43進行驅動來使螺桿25旋轉，並將供應給螺桿25的螺旋狀的槽26內之成形材料往前送。成形材料在缸體21內前進之同時，逐漸熔融。隨著液狀的成形材料被送到螺桿25的前方，並蓄積於缸體21的前部，螺桿25後退。 In the measurement process, the measurement motor 43 is driven to rotate the screw 25, and the molding material in the spiral groove 26 supplied to the screw 25 is forwarded. The molding material is gradually melted while advancing in the cylinder block 21. As the liquid forming material is fed forward of the screw 25 and accumulated in the front portion of the cylinder 21, the screw 25 moves backward.
在計量製程中，為了限制螺桿25的急劇後退，亦可以對螺桿25施加既定的背壓之方式驅動射出馬達42。若螺桿25後退至既定位置，且在螺桿25的前方蓄積了既定量的成形材料，則計量馬達43和射出馬達42停止。 In the measurement process, in order to limit the rapid retreat of the screw 25, the injection motor 42 may be driven by applying a predetermined back pressure to the screw 25. When the screw 25 is retracted to a predetermined position and a predetermined amount of molding material is accumulated in front of the screw 25, the metering motor 43 and the injection motor 42 are stopped.
在開模製程中，驅動合模馬達41而使肘節機構16動作，以使可動壓板13離開固定壓板12。使動模33離開定模32而將模具裝置30打開。 During the mold opening process, the mold clamping motor 41 is driven to move the toggle mechanism 16 so that the movable platen 13 is separated from the fixed platen 12. The movable mold 33 is separated from the fixed mold 32 to open the mold device 30.
在頂出製程中，藉由驅動頂出馬達44來從開模狀態的模具裝置30頂出成形品。 In the ejection process, the ejection motor 44 is driven to eject the molded product from the mold device 30 in the opened state.
第2圖係表示本發明的第1實施形態之射出成形機的電路之圖。如第2圖所示，射出成形機10具備轉換器 50、DC鏈路60、作為電力供應部之換流器70、及升壓電路80。 Fig. 2 is a diagram showing a circuit of an injection molding machine according to the first embodiment of the present invention. As shown in FIG. 2, the injection molding machine 10 includes a converter 50. A DC link 60, an inverter 70 as a power supply unit, and a booster circuit 80.
轉換器50透過3根交流電源線路51~53連接於3相交流電源P，並將從3相交流電源P供應之交流電力轉換成直流電力。轉換器50例如為3相橋式電路，其包含6個二極體。 The converter 50 is connected to the three-phase AC power source P through three AC power lines 51 to 53 and converts the AC power supplied from the three-phase AC power source P into DC power. The converter 50 is, for example, a three-phase bridge circuit including six diodes.
另外，本實施形態的交流電源可為3相交流亦可為2相交流。此外，轉換器50只要是將交流電力轉換成直流電力者即可，例如除了二極體外，亦可包含開關元件。作為開關元件的具體例，例如可舉出MOSFET(Metal Oxide Semiconductor Filed-Effect Transistor)、IGBT(Insulated Gate Bipolar Transistor)、雙極電晶體等。二極體反並聯連接於各開關元件。二極體也可內置於各開關元件內。 The AC power source of this embodiment may be a 3-phase AC or a 2-phase AC. In addition, the converter 50 is only required to convert AC power to DC power. For example, the converter 50 may include a switching element in addition to a diode. Specific examples of the switching element include a MOSFET (Metal Oxide Semiconductor Filed-Effect Transistor), an IGBT (Insulated Gate Bipolar Transistor), and a bipolar transistor. Diodes are connected in antiparallel to each switching element. The diode may be built into each switching element.
DC鏈路60包括2根直流電源線路61、62、及DC鏈路電容器63。2根直流電源線路61、62連接轉換器50與換流器70。DC鏈路電容器63使2根直流電源線路61、62之間的直流電壓平滑化。DC鏈路電容器63的電壓相當於DC鏈路電壓。 The DC link 60 includes two DC power lines 61 and 62 and a DC link capacitor 63. The two DC power lines 61 and 62 connect the converter 50 and the inverter 70. The DC link capacitor 63 smoothes the DC voltage between the two DC power supply lines 61 and 62. The voltage of the DC link capacitor 63 corresponds to a DC link voltage.
換流器70將從DC鏈路60供應之直流電力轉換成交流電力而供應給作為3相交流負載之射出馬達42。換流器70例如具有3個由2個開關元件構成之臂部，而向射出馬達42供應電力。另外，負載例如亦可為2相交流負載，且臂部的數量無特別限定。 The inverter 70 converts the DC power supplied from the DC link 60 into AC power and supplies it to the injection motor 42 as a three-phase AC load. The inverter 70 has, for example, three arm portions composed of two switching elements, and supplies electric power to the injection motor 42. The load may be, for example, a two-phase AC load, and the number of arms is not particularly limited.
升壓電路80為使DC鏈路電壓升壓之電路。升壓電路80具有轉換器部81及升壓部90。轉換器部81及升壓部90串聯配設。 The boost circuit 80 is a circuit that boosts the DC link voltage. The booster circuit 80 includes a converter section 81 and a booster section 90. The converter unit 81 and the boosting unit 90 are arranged in series.
轉換器部81透過3根交流電源線路83~85及3根交流電源線路51~53連接於3相交流電源P，而將從3相交流電源P透過交流電源線路51~53、83~85供應之交流電力轉換成直流電力。轉換器部81具有和轉換器50同樣的構造。 The converter unit 81 is connected to the 3-phase AC power source P through 3 AC power lines 83 to 85 and 3 AC power lines 51 to 53, and is supplied from the 3-phase AC power P through the AC power lines 51 to 53, 83 to 85. The AC power is converted into DC power. The converter unit 81 has the same structure as the converter 50.
升壓部90利用從轉換器部81供應之直流電將DC鏈路電壓進行升壓。升壓部90包括例如電感器91、第1開關元件92、第1二極體93、第2開關元件94、第2二極體95。 The boosting unit 90 boosts the DC link voltage by using the direct current supplied from the converter unit 81. The boosting unit 90 includes, for example, an inductor 91, a first switching element 92, a first diode 93, a second switching element 94, and a second diode 95.
第1開關元件92的一端連接於高壓側直流電源線路61，第2開關元件94的一端連接於低壓側直流電源線路62。第1開關元件92的另一端與第2開關元件94的另一端透過中間節點96來連接。中間節點96連接於電感器91的一端，電感器91的另一端連接於轉換器部81的高壓側輸出端子。轉換器部81的低壓側輸出端子連接於低壓側直流電源線路62。第1二極體93反並聯連接於第1開關元件92，第2二極體95反並聯連接於第2開關元件94。 One end of the first switching element 92 is connected to the high-voltage DC power line 61, and one end of the second switching element 94 is connected to the low-voltage DC power line 62. The other end of the first switching element 92 and the other end of the second switching element 94 are connected through an intermediate node 96. The intermediate node 96 is connected to one end of the inductor 91, and the other end of the inductor 91 is connected to a high-voltage-side output terminal of the converter section 81. The low-voltage-side output terminal of the converter unit 81 is connected to a low-voltage-side DC power supply line 62. The first diode 93 is connected to the first switching element 92 in anti-parallel, and the second diode 95 is connected to the second switching element 94 in anti-parallel.
控制部45控制第1開關元件92及第2開關元件94的開/關狀態，使DC鏈路電壓升壓。第1開關元件92及第2開關元件94中，一個為打開狀態時，另一個成為關 閉狀態。亦可兩者均為關閉狀態。兩者無法同時處於打開狀態。 The control unit 45 controls the on / off states of the first switching element 92 and the second switching element 94 to increase the DC link voltage. When one of the first switching element 92 and the second switching element 94 is turned on, the other is turned off Closed state. Alternatively, both can be turned off. Both cannot be turned on at the same time.
例如，控制部45將第1開關元件92維持為關閉狀態，並且將第2開關元件94交替切換成打開狀態和關閉狀態，藉此使DC鏈路電壓升壓。當第2開關元件94為打開狀態時，電流流過電感器91，在藉由該電流所形成之磁場蓄積能量。若第2開關元件94從打開狀態切換成關閉狀態，則所蓄積之磁能被釋放，電流被供應給DC鏈路電容器63，而使DC鏈路電壓升壓。 For example, the control unit 45 boosts the DC link voltage by maintaining the first switching element 92 in an off state and alternately switching the second switching element 94 into an on state and an off state. When the second switching element 94 is in an open state, a current flows through the inductor 91 and energy is accumulated in a magnetic field formed by the current. When the second switching element 94 is switched from the on state to the off state, the stored magnetic energy is released, and a current is supplied to the DC link capacitor 63 to boost the DC link voltage.
此外，控制部45亦可將第1開關元件92交替切換成打開狀態和關閉狀態，並且將第2開關元件94交替切換成打開狀態和關閉狀態，藉此使DC鏈路電壓升壓。當DC鏈路電壓升壓至超過設定值時，能夠使DC鏈路電壓下降至設定值。為了能夠對DC鏈路電壓進行降壓而使用電容器97。電容器97的一端連接於低壓側直流電源線路62，電容器97的另一端連接於將轉換器部81的高壓側端子與電感器91進行連接之電流路徑。 In addition, the control unit 45 may alternately switch the first switching element 92 to an on state and an off state, and alternately switch the second switching element 94 to an on state and an off state, thereby boosting the DC link voltage. When the DC link voltage is boosted beyond a set value, the DC link voltage can be reduced to a set value. In order to be able to step down the DC link voltage, a capacitor 97 is used. One end of the capacitor 97 is connected to the low-voltage DC power supply line 62, and the other end of the capacitor 97 is connected to a current path connecting the high-voltage terminal of the converter unit 81 and the inductor 91.
另外，即使沒有第1開關元件92及第2二極體95，將第2開關元件94交替切換打開狀態和關閉狀態也能夠對DC鏈路電壓進行升壓。 In addition, even if the first switching element 92 and the second diode 95 are not provided, the DC link voltage can be boosted by alternately switching the second switching element 94 on and off.
如此，依本實施形態，藉由升壓電路80將DC鏈路電壓進行升壓，因此能夠在驅動射出馬達42時充份地確保DC鏈路電壓。能夠充份地確保對於射出馬達42之供應電力，且射出馬達42的響應性良好。 As described above, according to this embodiment, the DC link voltage is boosted by the booster circuit 80, so that the DC link voltage can be sufficiently secured when the injection motor 42 is driven. The power supply to the injection motor 42 can be sufficiently secured, and the response of the injection motor 42 is good.
升壓電路80亦可相對於供應路徑98並聯配設。供應路徑98包含直流電源線路61、62、及交流電源線路51~53。與在直流電源線路61、62的中途串聯***升壓電路相比，更容易附加升壓電路80，並且能夠降低升壓電路80的容量。 The booster circuit 80 may be provided in parallel with the supply path 98. The supply path 98 includes DC power lines 61 and 62 and AC power lines 51 to 53. Compared with inserting the booster circuit in series in the middle of the DC power supply lines 61 and 62, it is easier to add the booster circuit 80, and the capacity of the booster circuit 80 can be reduced.
第3圖係以實線表示本發明的第1實施形態之射出馬達的轉速、射出馬達的轉矩、及DC鏈路電壓的變遷之圖。第3圖的虛線表示以往的變遷。實線與虛線重疊之部份以實線表示。 FIG. 3 is a diagram showing the rotation speed of the injection motor, the torque of the injection motor, and the change in the DC link voltage with solid lines in the first embodiment of the present invention. The dotted line in FIG. 3 shows the conventional transition. The overlap between the solid line and the dotted line is indicated by the solid line.
如在第3圖中以實線表示，控制部45在時刻t0使升壓電路80動作來將DC鏈路電壓Vdc進行升壓。DC鏈路電壓Vdc在時刻t1達到設定值後，換流器70在時刻t2動作而將電力供應給射出馬達42，使射出馬達42的轉速N變大。這樣一來，射出馬達42的轉矩T變大，DC鏈路電壓Vdc下降。 As shown by a solid line in FIG. 3, the control unit 45 operates the booster circuit 80 at time t0 to boost the DC link voltage Vdc. After the DC link voltage Vdc reaches the set value at time t1, the inverter 70 operates at time t2 and supplies power to the injection motor 42 to increase the rotation speed N of the injection motor 42. As a result, the torque T of the injection motor 42 increases, and the DC link voltage Vdc decreases.
如在第3圖中以虛線表示，在以往，DC鏈路電壓Vdc變得過低，射出馬達42的轉矩T在時刻t3達到頂點，射出馬達42的加速度下降。 As shown by a dashed line in FIG. 3, in the past, the DC link voltage Vdc has become too low, the torque T of the injection motor 42 has reached its peak at time t3, and the acceleration of the injection motor 42 has decreased.
相對於此，本實施形態中能夠充份地確保DC鏈路電壓Vdc，且能夠充份確保射出馬達42的轉矩T，射出馬達42的轉速N以恆定的加速度變大。因此，射出馬達42的轉速N在短時間內達到設定值，響應性良好。 In contrast, in the present embodiment, the DC link voltage Vdc can be sufficiently secured, and the torque T of the injection motor 42 can be sufficiently secured, and the rotation speed N of the injection motor 42 is increased at a constant acceleration. Therefore, the rotation speed N of the injection motor 42 reaches the set value in a short time, and the response is good.
在上述第1實施形態與第2實施形態中，升壓電路的結構不同。除此之外的結構相同。以下，主要對不同點進行說明。 The configuration of the booster circuit is different between the first embodiment and the second embodiment. Other structures are the same. Hereinafter, the differences will be mainly described.
第4圖係表示本發明的第2實施形態之射出成形機的電路之圖。如第4圖所示，射出成形機具備轉換器50、DC鏈路60、作為電力供應部之換流器70、及升壓電路180。升壓電路180代替第2圖中所示之升壓電路80來使用。 Fig. 4 is a diagram showing a circuit of an injection molding machine according to a second embodiment of the present invention. As shown in FIG. 4, the injection molding machine includes a converter 50, a DC link 60, an inverter 70 as a power supply unit, and a booster circuit 180. The booster circuit 180 is used instead of the booster circuit 80 shown in FIG. 2.
升壓電路180係使DC鏈路電壓升壓之電路。升壓電路180利用從轉換器50供應之直流電來將DC鏈路電壓進行升壓。升壓電路180例如包含電感器191、第1開關元件192、第1二極體193、第2開關元件194、及第2二極體195。 The boost circuit 180 is a circuit that boosts the DC link voltage. The boost circuit 180 boosts the DC link voltage by using the DC power supplied from the converter 50. The booster circuit 180 includes, for example, an inductor 191, a first switching element 192, a first diode 193, a second switching element 194, and a second diode 195.
第1開關元件192的一端連接於高壓側直流電源線路61的第1連接點P1，第2開關元件194的一端連接於低壓側直流電源線路62。第1開關元件192的另一端與第2開關元件194的另一端透過中間節點196來連接。中間節點196連接於電感器191的一端，電感器191的另一端透過二極體186連接於高壓側直流電源線路61的第2連接點P2。亦可在第1連接點P1與第2連接點P2之間***用於防止電流從DC鏈路電容器63向轉換器50逆流之二極體187。該二極體187能夠附加地***於直流電源線路61的中途。第1二極體193反並聯連接於第1開關元件192，第2二極體195反並聯連接於第2開關元件194。 One end of the first switching element 192 is connected to the first connection point P1 of the high-voltage-side DC power line 61, and one end of the second switching element 194 is connected to the low-voltage DC power line 62. The other end of the first switching element 192 and the other end of the second switching element 194 are connected through an intermediate node 196. The intermediate node 196 is connected to one end of the inductor 191, and the other end of the inductor 191 is connected to the second connection point P2 of the high-voltage DC power supply line 61 through the diode 186. A diode 187 may be inserted between the first connection point P1 and the second connection point P2 to prevent current from flowing backward from the DC link capacitor 63 to the converter 50. The diode 187 can be additionally inserted in the middle of the DC power line 61. The first diode 193 is connected to the first switching element 192 in anti-parallel, and the second diode 195 is connected to the second switching element 194 in anti-parallel.
控制部45控制第1開關元件192及第2開關元件194的開/關狀態，使DC鏈路電壓升壓。第1開關元件192及第2開關元件194中，一個為打開狀態時，另一個成為關閉狀態。也可兩者均為關閉狀態。兩者無法同時處於打開狀態。為了能夠將DC鏈路電壓進行降壓而使用電容器197。電容器197的一端連接於低壓側直流電源線路62，電容器197的另一端連接於電感器191與二極體186之間的中間節點188。 The control unit 45 controls the on / off states of the first switching element 192 and the second switching element 194 to increase the DC link voltage. When one of the first switching element 192 and the second switching element 194 is turned on, the other is turned off. Alternatively, both can be turned off. Both cannot be turned on at the same time. To be able to step down the DC link voltage, a capacitor 197 is used. One end of the capacitor 197 is connected to the low-voltage DC power supply line 62, and the other end of the capacitor 197 is connected to an intermediate node 188 between the inductor 191 and the diode 186.
另外，即使沒有第1開關元件192及第2二極體195，將第2開關元件194交替切換打開狀態和關閉狀態也能夠將DC鏈路電壓進行升壓。 In addition, even if the first switching element 192 and the second diode 195 are not present, the DC link voltage can be boosted by alternately switching the second switching element 194 to an on state and an off state.
如此，依本實施形態，藉由升壓電路180來將DC鏈路電壓進行升壓，因此能夠在驅動射出馬達42時充份地確保DC鏈路電壓。能夠充份地確保對於射出馬達42之供應電力，且射出馬達42的響應性良好。 As described above, according to this embodiment, the DC link voltage is boosted by the booster circuit 180, so that the DC link voltage can be sufficiently secured when the injection motor 42 is driven. The power supply to the injection motor 42 can be sufficiently secured, and the response of the injection motor 42 is good.
升壓電路180亦可相對於供應路徑198並聯配設。供應路徑198由直流電源線路61、62構成。與在直流電源線路61、62的中途串聯***升壓電路相比，更容易附加升壓電路180，並且能夠降低升壓電路180的容量。 The booster circuit 180 may be provided in parallel with the supply path 198. The supply path 198 is composed of DC power lines 61 and 62. Compared with inserting the booster circuit in series in the middle of the DC power supply lines 61 and 62, it is easier to add the booster circuit 180, and the capacity of the booster circuit 180 can be reduced.
以上，對射出成形機的實施形態進行了說明，但本發明並非限定於上述實施形態者，在申請專利範圍所記載之本發明技術思想的範圍內，能夠進行各種變形和改進。 As mentioned above, although the embodiment of the injection molding machine was demonstrated, this invention is not limited to the said embodiment, Various deformation | transformation and improvement are possible within the range of the technical idea of this invention described in the patent application range.
例如，上述實施形態的射出成形機10雖為同軸螺桿式，但也可為螺桿預塑式。在螺桿預塑式中，將在可塑化 缸體內熔融之成形材料供應給射出缸體，並從射出缸體向模具內射出成形材料。 For example, although the injection molding machine 10 of the above embodiment is a coaxial screw type, it may be a screw pre-molding type. In the screw pre-molding type, The molding material melted in the cylinder is supplied to the injection cylinder, and the molding material is injected from the injection cylinder into the mold.
此外，消耗來自上述實施形態的換流器70之電力之負載雖為射出馬達42，但亦可為合模馬達41、計量馬達43、或頂出馬達44。此外，負載亦可為用於模開閉之線性馬達、用於合模之電磁鐵，也可為對用於模開閉及合模之油壓泵進行驅動之馬達。當為電磁鐵時，向電磁鐵的線圈供應直流電力之電力供應部可具有與換流器70同樣的構造。 In addition, although the load which consumes the electric power from the inverter 70 of the said embodiment is the injection motor 42, it may be the mold clamping motor 41, the metering motor 43, or the ejection motor 44. In addition, the load may be a linear motor for mold opening and closing, an electromagnet for mold clamping, or a motor that drives a hydraulic pump for mold opening and closing, and mold clamping. In the case of an electromagnet, the power supply unit that supplies DC power to the coil of the electromagnet may have the same structure as that of the inverter 70.
此外，上述實施形態中，升壓電路的升壓開始時刻t0先於射出馬達42的驅動開始時刻t2，但亦可為同時或在時刻t2之後。只要射出馬達42的驅動中的DC鏈路電壓不變得過低即可。 In addition, in the above embodiment, the boosting start time t0 of the booster circuit precedes the driving start time t2 of the injection motor 42, but it may be simultaneous or after the time t2. It is only required that the DC link voltage during driving of the injection motor 42 does not become too low.
此外，上述實施形態中，升壓電路的升壓完成時刻t1先於射出馬達42的驅動開始時刻t2，但亦可為同時或在時刻t2之後。亦即，亦可在升壓電路動作時開始驅動射出馬達42。只要射出馬達42的驅動中的DC鏈路電壓不變得過低即可。 In addition, in the above-mentioned embodiment, the boosting completion time t1 of the booster circuit precedes the driving start time t2 of the injection motor 42, but it may be simultaneous or after the time t2. That is, the injection motor 42 may start to be driven when the booster circuit operates. It is only required that the DC link voltage during driving of the injection motor 42 does not become too low.
此外，上述實施形態的控制部45亦可使用電壓感測器等來對DC鏈路電壓進行監控，例如亦可將DC鏈路電壓成為既定值以上作為開始驅動射出馬達之條件。在開始驅動射出馬達42時當DC鏈路電壓小於既定值的情況，控制部45可中止射出馬達42的驅動，控制部45亦可使警報裝置動作。此外，控制部45亦可將DC鏈路電壓的 實際作業值儲存於硬碟等儲存部。DC鏈路電壓的實際作業值按每個成形品來進行儲存，其用於成形品的品質評價。 In addition, the control unit 45 of the above embodiment may monitor the DC link voltage using a voltage sensor or the like, and for example, the DC link voltage may be a predetermined value or more as a condition for starting to drive the injection motor. When the DC link voltage is lower than a predetermined value when the injection motor 42 starts to be driven, the control unit 45 may stop the driving of the injection motor 42, and the control unit 45 may activate the alarm device. In addition, the control unit 45 may The actual operation value is stored in a storage section such as a hard disk. The actual operating value of the DC link voltage is stored for each molded product, and it is used to evaluate the quality of the molded product.
Claims (4)
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| JP2013215056A JP6113625B2 (en) | 2013-10-15 | 2013-10-15 | Injection molding machine |
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| KR (1) | KR101633550B1 (en) |
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| KR101783121B1 (en) * | 2016-01-18 | 2017-09-28 | 엘에스산전 주식회사 | Inverter |
| JP6377097B2 (en) * | 2016-04-14 | 2018-08-22 | 株式会社日本製鋼所 | Injection molding machine system |
| CN107344386A (en) * | 2017-07-04 | 2017-11-14 | 陕西科技大学 | A kind of piezoelectric structured ceramic injection forming machine |
| CN113258801B (en) * | 2020-02-12 | 2022-11-29 | 新疆金风科技股份有限公司 | Direct current gets electric installation, system and wind generating set's start control system |
| JP7060644B2 (en) * | 2020-04-13 | 2022-04-26 | 日精樹脂工業株式会社 | Electrical circuit of injection molding machine |
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Also Published As
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| CN104552738A (en) | 2015-04-29 |
| JP2015077703A (en) | 2015-04-23 |
| TW201513990A (en) | 2015-04-16 |
| CN104552738B (en) | 2018-02-16 |
| KR20150043967A (en) | 2015-04-23 |
| KR101633550B1 (en) | 2016-06-24 |
| JP6113625B2 (en) | 2017-04-12 |
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