WO2016050002A1 - Electro-hydraulic hybrid injection mechanism - Google Patents
Electro-hydraulic hybrid injection mechanism Download PDFInfo
- Publication number
- WO2016050002A1 WO2016050002A1 PCT/CN2015/000629 CN2015000629W WO2016050002A1 WO 2016050002 A1 WO2016050002 A1 WO 2016050002A1 CN 2015000629 W CN2015000629 W CN 2015000629W WO 2016050002 A1 WO2016050002 A1 WO 2016050002A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- electric drive
- injection
- push plate
- hydraulic cylinder
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76545—Flow rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
Definitions
- the invention relates to the technical field of injection molding machines, in particular to an electro-hydraulic hybrid injection mechanism for injection of molten materials in an injection molding machine.
- Injection molding machines are commonly used plastic molding machines.
- the components on the injection molding machine are generally divided into a metering unit, a heating and plasticizing unit, an injection filling unit, a mold clamping unit, a cooling unit and a discharging unit. These functional units work together to complete the molding of the plastic part.
- the injection molding unit is completed by an injection mechanism.
- the injection mechanism usually includes a push plate for pushing the screw and the screw connector to move at a certain speed, and the screw movement requires the melt to be injected into the mold cavity at a sufficiently large injection speed in a short time while ensuring accurate injection. the amount.
- high injection speeds and precise injection volumes are required to achieve high quality products.
- the existing injection mechanism has two structures of hydraulic drive and electric drive.
- the hydraulic drive drives the push plate through the oil cylinder, and the oil cylinder is controlled by a hydraulic valve, which is controlled by the central control module.
- the speed and displacement of the push plate during the injection process are controlled by the cylinder drive.
- the advantage is that the power is sufficient to meet the injection speed requirement; the disadvantage is that the speed and displacement of the push plate cannot be accurately controlled, resulting in an error in the injection amount; if a servo valve is used, the servo valve is expensive and requires high hydraulic system and is expensive. In addition, the high energy consumption of the hydraulic system is unavoidable.
- the electric drive is the motor that drives the ball screw pair through the gear set (or timing pulley).
- the motor is powered to the gear, and the gear drives the ball screw pair to drive the push plate to complete the injection action.
- the electric drive can achieve precise control of the injection volume through the encoder; since the motor needs to overcome the strong injection resistance from the start to the maximum speed, the servo motor is difficult to provide sufficient power in a short time, resulting in slow injection response and insufficient injection speed. This has led to limited application of injection molding machines.
- the powerful driving force required for injection is obtained by the motor by driving the ball screw pair.
- the ball screw pair must be able to withstand the heavy load during the driving process.
- the general ball screw pair is not competent and can withstand heavy-duty ball screws. The general price is very expensive and the life is short, which affects the use of electric injection molding machines.
- the technical problem to be solved by the present invention is to provide an electro-hydraulic hybrid injection mechanism capable of providing sufficient ejection driving force in a short time to ensure an injection speed and accurately controlling an injection amount, in view of the state of the art.
- the injection mechanism also has the advantages of low energy consumption and low investment.
- the electro-hydraulic hybrid injection mechanism includes a push plate connected to the screw connector and an electric drive assembly connected to the push plate, wherein the push plate is further A piston or cylinder connected to the hydraulic cylinder is connected to the hydraulic valve, which is connected to the central control system of the injection molding machine.
- the electric drive assembly includes a ball screw pair that is drivingly coupled to the push plate, the ball screw pair being coupled to the drive motor via a transmission assembly.
- the present invention will innovate by controlling the driving force of the driving force and the driving force curve of the driving force with respect to the driving force of the driven object, and the moving speed of the driven object.
- the control of the positional parameter is separated from the control of the driving force.
- the hydraulic system only provides a strong driving force and is independent of the motion parameters such as the moving speed and positional parameters of the driven object and the hydraulic driving force, and the moving speed of the driven object and
- the positional parameters are independently performed by the electric drive mechanism.
- the encoder on the servo motor can be used. (Without the use of the pressure sensor), the precise injection molding of the injection molding machine can be controlled by controlling the motion curve of the push plate, or two types of control can be controlled. The way to use together.
- the electric drive assembly and the hydraulic cylinder of the invention can be used together to provide powerful injection power at the moment of injection of the melt, and the precise control of the melt injection amount can be easily realized by the electric drive mechanism, thereby ensuring product quality.
- the configuration requirements and operating environment requirements of the two are reduced; and the energy consumption is also greatly reduced compared to the hydraulic drive; the electric drive is greatly reduced compared to the use of the electric drive alone.
- the force that is, the motor power
- the electro-hydraulic hybrid injection mechanism provided by the invention can be used in other occasions in addition to the injection molding machine, for example, it is suitable for supporting the die casting machine and the like, and the molten material is filled at a certain speed and pressure in a short time.
- the mold cavity, and the driven object are required to be driven and accurately positioned by a powerful driving force in a short time.
- Figure 1 is a schematic view of an embodiment of the present invention
- FIG. 2 is a schematic diagram of an embodiment of the present invention.
- the electro-hydraulic hybrid injection mechanism comprises:
- Pushing plate 1 the first end face of the push plate 1 is connected to the screw connector 4 of the injection molding machine, and a pressure sensor 5 for detecting the pressure in the barrel of the injection molding machine is further disposed between the screw connector and the push plate, and the pressure sensor 5 will be The detected pressure is transmitted to the central control system 6, and the central control system makes a judgment based on the received data to control the relevant functional unit. Actions;
- the hydraulic cylinder 3 is provided in two parts.
- the piston rod of the hydraulic cylinder is drivingly connected to the first end surface of the push plate, and the piston rod of the hydraulic cylinder 3 can also be connected to the second end surface of the push plate as needed; or It may also be a cylinder connection push plate of the hydraulic cylinder;
- the hydraulic cylinder 3 is connected with a hydraulic power source through a hydraulic pipe (not shown) and a hydraulic valve 8, the hydraulic valve is also connected to the control system, and the control system issues a command to control the hydraulic valve. Opening and closing, thereby operating the hydraulic cylinder, the hydraulic valve in this embodiment is a solenoid valve;
- the electric drive assembly 2 converts the rotational motion of the motor into a linear motion to control the movement of the push plate.
- the electric drive component 2 in this embodiment includes:
- the lead screw 211 is connected to the transmission assembly 22, and is driven to rotate by the transmission assembly;
- the wire nut 212 is fixedly connected in the push plate 1;
- Encoder 7 can be connected to the motor 23, can also be connected to the ball screw pair, this embodiment is connected to the ball screw pair, the output of the encoder 7 is connected to the central control system 6;
- the transmission assembly 22 is configured to transmit the power of the motor 23 to the lead screw, which may be a gear transmission group, a pulley transmission group, or other transmission components, which may be selected and assembled according to requirements.
- the motor 23 has a control end connected to the central control system of the injection molding machine, and a central control system controls the operation of the motor.
- the central control system simultaneously controls the hydraulic valve and the motor to start. Since the hydraulic system is supplied with pressure and the power is large, the hydraulic cylinder pulls the push plate with sufficient power and extremely fast speed at the moment of melt injection. At the same time, the motor transmits power to the lead screw through the transmission component, the screw rotates to drive the nut to drive the push plate forward, and the auxiliary hydraulic system injects the melt, thereby driving the screw 6 to move quickly, and feeding the material with sufficient pressure and speed.
- the melt in the cylinder is injected to ensure the speed and pressure of the melt into the mold cavity, thus ensuring the quality of the injection molded product; at the same time, the electric drive mechanism precisely controls the displacement of the push plate, thereby precisely controlling the injection amount of the melt.
- the movement of the push plate in the electro-hydraulic hybrid injection mechanism is jointly driven by the hydraulic cylinder and the electric drive mechanism, and the movement speed and displacement of the push plate are completely controlled by the electric drive mechanism, which can fully ensure the pressure required by the injection molding machine and the pressure required by the injection molding machine.
- Speed, and precise control of injection volume to ensure the quality of the product; at the same time, due to the use of electric drive components and hydraulic cylinders, the configuration requirements and operating environment requirements of the two are reduced; and the energy consumption is also large compared to the hydraulic drive.
- the amplitude is reduced; the electric driving force (ie, the motor power) is greatly reduced compared to the use of the electric drive alone, and the working condition of the ball screw pair is greatly improved, and the cost of the electric drive mechanism is greatly reduced.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims (2)
- 一种电动液压混合式射出机构,包括与螺杆连接器相连接的推板(1)、与推板(1)相连的电动驱动组件(2),其特征在于:所述推板(1)还连接液压缸(3)的活塞或缸筒,所述液压缸(3)连接液压阀,所述液压阀连接注塑机的中央控制系统。An electro-hydraulic hybrid injection mechanism comprising a push plate (1) connected to a screw connector and an electric drive assembly (2) connected to the push plate (1), characterized in that: the push plate (1) is further A piston or cylinder connected to a hydraulic cylinder (3), the hydraulic cylinder (3) being connected to a hydraulic valve that is connected to a central control system of the injection molding machine.
- 根据权利要求1所述的电动液压混合式射出机构,其特征在于:所述电动驱动组件(2)包括与所述推板(1)驱动连接的滚珠丝杠副(21),所述滚珠丝杠副(21)通过传动组件(22)连接驱动电机(23)。 The electro-hydraulic hybrid injection mechanism according to claim 1, wherein said electric drive assembly (2) includes a ball screw pair (21) drivingly coupled to said push plate (1), said ball wire The lever pair (21) is connected to the drive motor (23) via a transmission assembly (22).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410522326.0A CN104260294A (en) | 2014-09-30 | 2014-09-30 | Electric-hydraulic hybrid injection mechanism |
CN201410522326.0 | 2014-09-30 |
Publications (1)
Publication Number | Publication Date |
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WO2016050002A1 true WO2016050002A1 (en) | 2016-04-07 |
Family
ID=52151937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2015/000629 WO2016050002A1 (en) | 2014-09-30 | 2015-09-06 | Electro-hydraulic hybrid injection mechanism |
Country Status (2)
Country | Link |
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CN (1) | CN104260294A (en) |
WO (1) | WO2016050002A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104260294A (en) * | 2014-09-30 | 2015-01-07 | 陈国永 | Electric-hydraulic hybrid injection mechanism |
CN112140470A (en) * | 2020-08-28 | 2020-12-29 | 金发科技股份有限公司 | Flash tank, injection molding device for manufacturing DDR connector and quality inspection method |
Citations (6)
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US5381702A (en) * | 1992-09-11 | 1995-01-17 | Moog Inc. | Hybrid electro-mechanical-hydraulic drive system, and method of operating same |
CN2502882Y (en) * | 2001-09-26 | 2002-07-31 | 宁波高新协力机电液有限公司 | Injection control device of injection machine |
CN1980783A (en) * | 2004-07-09 | 2007-06-13 | 德马格艾戈泰克有限公司 | Injection moulding machine |
CN103950144A (en) * | 2014-03-31 | 2014-07-30 | 广东顺德立信精密机械有限公司 | Electro-hydraulic injection molding machine and its control method |
CN104260294A (en) * | 2014-09-30 | 2015-01-07 | 陈国永 | Electric-hydraulic hybrid injection mechanism |
CN204222105U (en) * | 2014-09-30 | 2015-03-25 | 陈国永 | The hybrid ejecting mechanism of electric hydaulic |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10318958B3 (en) * | 2003-04-26 | 2004-08-05 | Krauss-Maffei Kunststofftechnik Gmbh | Hybrid injection unit for an injection molding machine, comprises a rotatable and axially movable plastifying worm in a cylinder, primary and secondary electric motors, and a housing |
DE102004033102A1 (en) * | 2004-07-08 | 2006-02-09 | Bosch Rexroth Aktiengesellschaft | drive unit |
JP2006088463A (en) * | 2004-09-22 | 2006-04-06 | Nissei Plastics Ind Co | Control method of electric/oil pressure type injection device |
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2014
- 2014-09-30 CN CN201410522326.0A patent/CN104260294A/en active Pending
-
2015
- 2015-09-06 WO PCT/CN2015/000629 patent/WO2016050002A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5381702A (en) * | 1992-09-11 | 1995-01-17 | Moog Inc. | Hybrid electro-mechanical-hydraulic drive system, and method of operating same |
CN2502882Y (en) * | 2001-09-26 | 2002-07-31 | 宁波高新协力机电液有限公司 | Injection control device of injection machine |
CN1980783A (en) * | 2004-07-09 | 2007-06-13 | 德马格艾戈泰克有限公司 | Injection moulding machine |
CN103950144A (en) * | 2014-03-31 | 2014-07-30 | 广东顺德立信精密机械有限公司 | Electro-hydraulic injection molding machine and its control method |
CN104260294A (en) * | 2014-09-30 | 2015-01-07 | 陈国永 | Electric-hydraulic hybrid injection mechanism |
CN204222105U (en) * | 2014-09-30 | 2015-03-25 | 陈国永 | The hybrid ejecting mechanism of electric hydaulic |
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Publication number | Publication date |
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CN104260294A (en) | 2015-01-07 |
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