CN212498838U - Servo direct-drive pump-controlled injection molding machine - Google Patents
Servo direct-drive pump-controlled injection molding machine Download PDFInfo
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- CN212498838U CN212498838U CN201921830025.9U CN201921830025U CN212498838U CN 212498838 U CN212498838 U CN 212498838U CN 201921830025 U CN201921830025 U CN 201921830025U CN 212498838 U CN212498838 U CN 212498838U
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Abstract
The utility model discloses a servo pump accuse injection molding machine that directly drives, including the headstock, screw rod and barrel, the headstock is connected with the barrel, be equipped with the screw rod in the barrel, the end of moulding plastics of screw rod is equipped with the check ring, barrel one end is equipped with the mouth of moulding plastics, the barrel top is equipped with the hopper, the barrel is moulded plastics and is held there is the mould mounting panel, install fixed mould and movable mould on the mould mounting panel, the movable mould passes through the connecting plate and is connected with the movable mould pneumatic cylinder, the movable mould pneumatic cylinder passes through switching-over valve and oil pump connection, the oil pump is connected with servo motor, servo motor is connected with the driver, the oil pump is connected with the hydro-cylinder. The servo motor is used for controlling the oil pump, the speed and moment control corresponding to the servo motor is realized through flow and pressure control, the driver acquires pressure and flow feedback information in real time through the pressure sensor and the encoder, the rotating speed and the moment of the servo motor are continuously adjusted, redundant energy loss is avoided, and the power consumption is reduced.
Description
Technical Field
The utility model relates to an injection molding machine field, in particular to servo direct drive pump accuse injection molding machine.
Background
The injection molding machine used by domestic enterprises at present mostly belongs to the traditional injection molding machine with a feedback control function, the machine adopts a three-phase asynchronous motor to drive a quantitative millet as an oil source, a flow and pressure proportional valve as a conversion and amplification element of an input signal, and certain response speed and control precision can be obtained. For the existing traditional injection molding machine, the following problems exist:
1. if the system speed control adopts a throttling speed regulation mode, the defects of serious energy loss, low transmission efficiency and the like exist; if the system adopts a volume speed regulation mode, even if the transmission efficiency can be improved, the system has the defects of small control range, complex structure of a hydraulic system, high cost and high failure rate;
2. the system pressure control generally adopts an overflow control method, so that a large amount of energy loss is caused;
3. the motor still operates at a constant speed during standby and pressure maintaining, which also causes a great deal of energy loss.
With the implementation of national energy-saving and emission-reducing policies and the improvement of automatic control technical requirements, the servo direct-drive pump control system replaces a valve control servo system, which is the future development trend of the injection molding machine.
Chinese utility model patent CN208634147U announces a hydraulic energy-saving system that driving motor directly driven pump accuse differential cylinder for 2019, 03, 22, through controller input signal gives the driver, the rethread driver control driving motor's rotational speed and direction, and then control the flow of two-way hydraulic pump, it is right finally to realize the control of pneumatic cylinder. However, the structure is complex and the number of components used is large.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a servo direct drive pump accuse injection molding machine adopts servo motor direct drive constant delivery pump to provide the hydraulic pressure oil supply, simple structure, overall arrangement compactness, stability are good, transmission efficiency is high, and energy-conserving effect is showing.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a servo direct-drive pump-controlled injection molding machine comprises an injection molding machine body, wherein the injection molding machine body comprises a power box, a screw and a barrel, the power box is connected with the barrel, the screw is arranged in the barrel, an injection molding end of the screw is provided with a check ring, one end of the barrel is provided with an injection molding opening, a hopper is arranged above the barrel, the barrel sequentially comprises an inner barrel, a heating layer, a heat-insulating layer and an outer barrel from inside to outside, a heater is arranged in the heating layer, a mold mounting plate is arranged at the injection molding end of the barrel, a fixed mold and a movable mold are mounted on the mold mounting plate, the movable mold is connected with a hydraulic device through a connecting plate, the hydraulic device comprises a movable mold hydraulic cylinder, a reversing valve, an oil pump, a servo motor, a driver, a controller, an oil cylinder and an oil tank, piston gas tightness slidable connect in the cylinder body, just the piston will inside first cavity and the second cavity of being divided into of cylinder body, the movable mould pneumatic cylinder passes through the switching-over valve with oil pump connection the oil pump with servo motor connects, servo motor with the driver is connected, driver communication connection the controller, the oil pump with the hydro-cylinder is connected, the switching-over valve with the oil tank is connected, be equipped with pressure sensor on the oil pump, the last encoder that is equipped with of servo motor.
Preferably, the servo motor is a permanent magnet synchronous motor.
Preferably, the encoder is a rotary variable-voltage encoder.
Preferably, the oil pump is a fixed displacement pump.
Preferably, the quantitative pump is an internal gear pump, a plunger pump or a screw pump.
Preferably, a motor is arranged in the power box, a motor support is arranged below the motor, the motor is connected with a primary gear, the primary gear is meshed with a secondary gear, the secondary gear is connected with the screw rod, and the screw rod is connected with the injection molding cylinder through a connecting ring.
Preferably, a heat dissipation fan is disposed at one side of the motor.
Preferably, the heat dissipation fan is fixed on the side wall of the power box through a screw, and the motor is connected with the motor support through a bolt.
Preferably, the fixed die and the movable die are fixed to the die mounting plate by screws.
The utility model discloses servo direct drive pump accuse injection molding machine controls the oil pump with servo motor, and hydraulic system's flow corresponds servo motor's speed and torque control with pressure control, and the driver passes through pressure sensor and the real-time pressure and the flow feedback signal that acquire injection molding machine hydraulic system of encoder to servo motor's rotational speed and moment are constantly adjusted. Therefore, the flow and the pressure of the hydraulic system can be matched as required by the servo motor in the whole load change range, no redundant energy loss is caused, and the power consumption reaches the minimum value.
Drawings
FIG. 1 is a schematic structural view of the servo direct drive pump control injection molding machine of the present invention;
FIG. 2 is a schematic diagram of a hydraulic servo structure of the servo direct-drive pump-controlled injection molding machine of the present invention;
FIG. 3 is a schematic structural view of a power box in the servo direct drive pump control injection molding machine of the present invention;
FIG. 4 is a schematic structural view of a cylinder in the servo direct drive pump control injection molding machine of the present invention;
in the figure, 1-power box, 11-motor, 12-motor bracket, 13-primary gear, 14-secondary gear, 15-connecting ring, 16-injection cylinder, 17-heat radiation fan, 2-screw, 21-check ring, 22-injection mouth, 23-hopper, 3-cylinder, 31-inner cylinder, 32-heating layer, 321-heater, 33-heat insulation layer, 34-outer cylinder, 4-mould mounting plate, 41-fixed mould, 42-movable mould, 43-connecting plate, 44-hydraulic device, 441-movable mould hydraulic cylinder, 4411-cylinder, 4412-piston, 4414-first chamber, 4415-second chamber, 4413-piston rod, 442-reversing valve, 443-oil pump, 4431-pressure sensor, 444-servo motor, 4441-encoder, 445-driver, 446-controller, 447-oil cylinder and 448-oil tank.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, 2 and 4, a servo direct drive pump accuse injection molding machine, including the injection molding machine body, the injection molding machine body includes headstock 1, screw rod 2 and barrel 3, headstock 1 with barrel 3 is connected, be equipped with in barrel 3 screw rod 2, the end of moulding plastics of screw rod 2 is equipped with check ring 21, barrel 3 one end is equipped with injection molding mouth 22, barrel 3 top is equipped with hopper 23, barrel 3 includes inner tube 31, zone of heating 32, heat preservation insulating layer 33 and urceolus 34 from inside to outside in proper order, be equipped with heater 321 in the zone of heating 32, barrel 3 is moulded plastics and is held there is mould mounting panel 4, install fixed mould 41 and movable mould 42 on the mould mounting panel 4, movable mould 42 is connected with hydraulic means 44 through connecting plate 43, hydraulic means 44 includes movable mould pneumatic cylinder 441, switching-over valve 442, oil pump 443, servo motor 444, The movable die hydraulic cylinder 441 comprises a cylinder body 4411, a piston 4412 and a piston rod 4413, one end of the piston rod 4413 is fixedly connected to the piston 4412, the piston 4412 is connected to the cylinder body 4411 in an airtight and slidable manner, the piston 4412 divides the interior of the cylinder body 4411 into a first chamber 4414 and a second chamber 4415, the movable die hydraulic cylinder 441 is connected with the oil pump 443 through the reversing valve 442, the oil pump 443 is connected with the servo motor 444, the servo motor 444 is connected with the driver 445, the driver 445 is in communication connection with the controller 446, the oil pump 443 is connected with the cylinder, the reversing valve 442 is connected with the oil tank 448, the oil pump 443 is provided with a pressure sensor 4431, and the servo motor 444 is provided with an encoder 4441.
The utility model discloses servo direct drive pump accuse injection molding machine controls oil pump 443 with servo motor 444, and hydraulic system's flow and pressure control correspond the speed and the moment control to servo motor 444, because servo motor 444 can be by accurate control, only need the speed and the moment of accurate control servo motor 444 just can be fine control hydraulic system's flow and pressure, consequently can come the power of output motor according to actual need. At this time, the driver 445 acquires and obtains the pressure and flow feedback signals of the hydraulic system of the injection molding machine in real time through the pressure sensor 4431 and the encoder 4441, and constantly adjusts the rotating speed and the torque of the motor. Therefore, the servo motor 444 realizes the flow and pressure matching of the hydraulic system as required in the whole load change range, no redundant energy loss exists, and the power consumption reaches the minimum value.
The servo motor 444 is a permanent magnet synchronous motor. The permanent magnet synchronous motor belongs to a brushless motor, and the rotor adopts a permanent magnet, so that the permanent magnet synchronous motor has the advantages of simple structure, high power factor, wide speed regulation range, large output torque, high control precision, strong overload capacity, high reliability, low energy consumption and the like. The permanent magnet synchronous motor has small rotational inertia, small torque pulsation, linear torque-current characteristic and large overload capacity; the permanent magnet synchronous motor has small volume, light weight, high efficiency, no rotor heating problem and simpler control system than an asynchronous motor.
The encoder 4441 is a rotary transformer encoder. The signal conditioning circuit of the rotary variable-voltage encoder is designed in the servo motor 444, the rotary variable-voltage encoder is firm in structure, has the characteristics of strong impact and interference resistance, high temperature resistance and the like, and the encoder 4441 obtains the accurate position and speed of the rotor of the servo motor 444 in real time.
The oil pump 443 is a fixed displacement pump. The quantitative pump has the advantages of strong oil pollution resistance, high reliability, low noise, long service life and the like. The quantitative pump is an internal gear pump, a plunger pump or a screw pump.
As shown in fig. 3, an electric motor 11 is disposed in the power box 1, an electric motor support 12 is disposed below the electric motor 11, the electric motor 11 is connected to a primary gear 13, the primary gear 13 is engaged with a secondary gear 14, the secondary gear 14 is connected to the screw 2, and the screw 2 is connected to an injection cylinder 16 through a connecting ring 15.
A heat radiating fan 17 is provided at one side of the motor 11. A heat dissipation fan 17 is arranged in the power box 1 to ensure that the motor 11 works at normal temperature.
The heat dissipation fan 17 is fixed on the side wall of the power box 1 through screws, and the motor 11 is connected with the motor support 12 through bolts.
The fixed die 41 and the movable die 42 are fixed to the die mounting plate 4 by screws.
The utility model discloses servo direct drive pump control injection molding machine theory of operation as follows: the working principle of the servo direct-drive pump control system when the servo motor 444 works in a speed closed loop state is described by die assembly. When the mold is firstly closed, speed control is taken as a target, the servo motor 444 drives the oil pump 443 at a given speed, hydraulic oil is injected into the first chamber 4414 of the movable mold hydraulic cylinder 441 through the AB end of the electromagnetic valve, the movable mold is pushed to move forward through the connecting rod, and the hydraulic oil in the second chamber 4415 flows back to the oil tank 448 through the CD end of the electromagnetic valve. When the moving die approaches the termination position, the moving die is switched to a high-pressure die locking stage, the driver acquires pressure and flow feedback signals of a hydraulic system of the injection molding machine in real time through the pressure sensor and the encoder, and the rotating speed and the torque of the servo motor are continuously adjusted. Therefore, the flow and the pressure of the hydraulic system can be matched as required by the servo motor in the whole load change range, no redundant energy loss is caused, and the power consumption reaches the minimum value.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (9)
1. The utility model provides a servo direct drive pump accuse injection molding machine, includes the injection molding machine body, its characterized in that: the injection molding machine body comprises a power box, a screw and a barrel, the power box is connected with the barrel, the screw is arranged in the barrel, an injection molding end of the screw is provided with a check ring, one end of the barrel is provided with an injection molding opening, a hopper is arranged above the barrel, the barrel sequentially comprises an inner barrel, a heating layer, a heat insulation layer and an outer barrel from inside to outside, a heater is arranged in the heating layer, the injection molding end of the barrel is provided with a mold mounting plate, a fixed mold and a movable mold are mounted on the mold mounting plate, the movable mold is connected with a hydraulic device through a connecting plate, the hydraulic device comprises a movable mold hydraulic cylinder, a reversing valve, an oil pump, a servo motor, a driver, a controller, an oil cylinder and an oil tank, the movable mold hydraulic cylinder comprises a cylinder body, a piston and a piston rod, just the piston will inside first cavity and the second cavity of being divided into of cylinder body, the movable mould pneumatic cylinder passes through the switching-over valve with the oil pump is connected the oil pump with servo motor connects, servo motor with the driver is connected, driver communication connection the controller, the oil pump with the hydro-cylinder is connected, the switching-over valve with the oil tank is connected, be equipped with pressure sensor on the oil pump, the last encoder that is equipped with of servo motor.
2. The servo direct drive pump control injection molding machine according to claim 1, characterized in that: the servo motor is a permanent magnet synchronous motor.
3. The servo direct drive pump control injection molding machine according to claim 1, characterized in that: the encoder is a rotary variable-voltage encoder.
4. The servo direct drive pump control injection molding machine according to claim 1, characterized in that: the oil pump is a fixed displacement pump.
5. The servo direct drive pump control injection molding machine according to claim 4, characterized in that: the quantitative pump is an internal gear pump, a plunger pump or a screw pump.
6. The servo direct drive pump control injection molding machine according to claim 1, characterized in that: the injection molding machine is characterized in that a motor is arranged in the power box, a motor support is arranged below the motor, the motor is connected with a primary gear, the primary gear is meshed with a secondary gear, the secondary gear is connected with the screw rod, and the screw rod is connected with an injection molding cylinder through a connecting ring.
7. The servo direct drive pump control injection molding machine according to claim 6, characterized in that: and a heat dissipation fan is arranged on one side of the motor.
8. The servo direct drive pump control injection molding machine according to claim 7, characterized in that: the heat dissipation fan is fixed on the side wall of the power box through screws, and the motor is connected with the motor support through bolts.
9. The servo direct drive pump control injection molding machine according to claim 1, characterized in that: the fixed die and the movable die are fixed on the die mounting plate through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830025.9U CN212498838U (en) | 2019-10-28 | 2019-10-28 | Servo direct-drive pump-controlled injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830025.9U CN212498838U (en) | 2019-10-28 | 2019-10-28 | Servo direct-drive pump-controlled injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212498838U true CN212498838U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921830025.9U Active CN212498838U (en) | 2019-10-28 | 2019-10-28 | Servo direct-drive pump-controlled injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212498838U (en) |
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2019
- 2019-10-28 CN CN201921830025.9U patent/CN212498838U/en active Active
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