CN201394650Y - Servo-control semi-solid magnesium alloy high-speed injection molding machine - Google Patents
Servo-control semi-solid magnesium alloy high-speed injection molding machine Download PDFInfo
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- CN201394650Y CN201394650Y CN 200920151391 CN200920151391U CN201394650Y CN 201394650 Y CN201394650 Y CN 201394650Y CN 200920151391 CN200920151391 CN 200920151391 CN 200920151391 U CN200920151391 U CN 200920151391U CN 201394650 Y CN201394650 Y CN 201394650Y
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Abstract
A servo-control semi-solid magnesium alloy high-speed injection molding machine comprises a clamping mechanism, an injection mechanism, a hydraulic mechanism, an electrical mechanism and a frame, wherein an injection oil cylinder in the injection mechanism is provided with a hollow floating piston, a feed system is provided with a feed screw assembly capable of forming the semi-solid magnesium alloy; the hydraulic mechanism comprises a cartridge valve and a high-response energy accumulator, a high-speed injection speed control system is provided with a high frequency response servo valve in the oil outlet side of the injection oil cylinder, two pressure sensors PS1 and PS2 are arranged at the oil inlet side and the oil outlet side of the injection oil cylinder; the electrical mechanism isprovided with a CPU module to control the high-speed injection speed and perform real-time closed loop control. The injection molding machine of the utility model has the advantages of compact structure, low manufacturing cost, low volume and energy consumption, high control precision, easy adjustment, and capability of injecting at high speed, and performing closed loop control to the injection speed, holding pressure and plastifying backpressure.
Description
Technical field
The utility model relates to a kind of injection (mo(u)lding) machine, and particularly a kind of Servocontrol semi-solid state magnesium alloy high speed injection molding machine belongs to metal alloy compositions thermoforming process technology and apparatus field.
Background technology
In the magnesium alloy materials production application, hot cell that technology maturity is high and cold chamber die casting be the proportion maximum in various magnesium alloy molded technology.Magnesium alloy pressure-casting needs high injection speed, thereby in mould, have the molten metal turbulent flow inevitably and roll up the generation of gas phenomenon, cause the inner and surface generation hole defect of workpiece, cause product strength low, can't heat treatment, poor air-tightness, also cause mould difficult design, yields to be difficult to control in addition; Secondly, the fusing magnesium alloy also relates to a series of problems such as safety and environmental protection.Therefore, advantages such as dimensional stability is good, productivity ratio is high though the diecast magnesium alloy product has, die-casting die and life tools are long also exist to be mingled with problem many, that restriction magnesium-alloy materials such as pore is many, difficult heat treatment after the moulding, size near-net-shape difference further enlarge application.Therefore for surface quality and the demanding foundry goods of mechanical performance, the magnesium-alloy material that adopts casting die to produce can't satisfy industrial requirements.
Thixotropic injection forming technique (Thixomolding) is present unique industrial semisolid forming technique of magnesium alloy that is used for.This technology is used in beginning in 1992 is commercial, and patent right is held by U.S. Thixomat company, and so far, the said firm only authorizes the JSW company of Japan and Canadian HUSKY company to produce magnesium alloy thixotropic injection former.Because the overall price of equipment is higher, high in addition patent grant expense, so compare with die-cast product, production cost will exceed several times even tens times, though the surface quality and the mechanical performance of thixotropic injection shaped article are higher, the overall competitiveness of product still a little less than.
China does not still have the producer that produces the magnesium alloy semi solid state injection forming equipment.In recent years, though China has also carried out comparatively extensive studies in the semi-solid casting field, be still blank in semisolid forming technique commercial application field, research work is also at the early-stage.
Chinese patent literature CN1817512 discloses metal semi-solid slurry preparation method and device in a kind of metal forming technology on August 16th, 2006.Its purpose is to provide a kind of can reduce the cost of raw material, improves the magnesium alloy semi solid state injection moulding method and the device of yield rate and product quality.Injection molding method comprises that metal dust mixes; Gas shield; Weight feed; Change metal dust into the solid-liquid admixture in the metal sleeve device that penetrate at variorum, stirring, conveying function is one; Semisolid injection moulding.Coinjection molding apparatus is made up of metal dust mixing arrangement and injector two parts, and the metal dust mixing arrangement is made up of metal dust stirred vessel and metal dust storage container; Injector comprise one focus penetrate, stirring, conveying function be the metal sleeve device of one, it is made up of sleeve and inner spiral conveyor rod, being peripherally equipped with of sleeve can be carried out temperature controlled cooler and heater to the different parts of sleeve.But it has the following disadvantages:
1, the mechanism and the control system that do not have high speed injection.Injection mechanism and the injection speed control system of implementing magnesium alloy semi solid state injection moulding processing should satisfy the requirement that type is filled in the semi-solid material injection, possess corresponding structure and high speed injection control system.
2, injection mechanism is not established check (non-return) valve.The injection mechanism of implementing magnesium alloy semi solid state injection moulding processing should have the good check (non-return) valve of sealing, could guarantee the dimensional stability and the required precision of goods.
Therefore, be necessary further improvement and perfect.
The utility model content
But the purpose of this utility model aims to provide a kind of compactness rational in infrastructure, low cost of manufacture, the little energy consumption of volume is low, control accuracy is high, the easy high speed injection of debugging, and can and plastify the Servocontrol semi-solid state magnesium alloy injection (mo(u)lding) machine that back pressure is carried out closed-loop control to injection speed, dwell pressure, to fill up the blank of domestic semi-solid magnesium alloy injection (mo(u)lding) machine.
A kind of Servocontrol semi-solid state magnesium alloy injection (mo(u)lding) machine by this purpose design, comprise clamping mechanism, injection mechanism, hydraulic mechanism, electric mechanism and frame, its architectural feature is that the injection cylinder in the injection mechanism is provided with hollow floating piston, disposes the feeding spiro rod assembly that can form the semi-solid magnesium alloy tissue morphology in the charging system; Hydraulic mechanism comprises inserted valve and high response accumulator, and the high speed injection speed control system is provided with high frequency response servo valve in the fuel-displaced side of injection cylinder, and injection cylinder oil-feed side and fuel-displaced side are provided with two pressure sensor PS1 and PS2, real-time detecting system pressure; Be provided with high-speed CPU module controls high speed injection speed in the electric mechanism, real-time closed-loop control.
An end is provided with hollow floating piston in the described injection cylinder, and the other end is fixed with abutment sleeve, and the openend of hollow floating piston inserts between abutment sleeve outer wall and the inboard wall of cylinder block and is sealed and matched; Hollow floating piston inside and outside wall is provided with low friction combination oil seal.Described hollow floating piston is a lightweight thin-walled piston, is provided with low friction combination oil seal between the stage casing of hollow floating piston and the injection cylinder inwall, is provided with low friction combination oil seal between the openend of hollow floating piston and the abutment sleeve; Hollow floating piston is connected with Connection Block by thrust bearing.
The oil suction chamber of described injection cylinder with go out oil pocket and directly be connected with the oily control panel of injection, adopt the uiform section runner; The oil suction chamber of injection cylinder and fuel-displaced cavity area ratio are 2.2: 1.Injection mechanism also is provided with self-regulating pair of rank injection position and rotary part, can regulate two kinds of different injection mechanism positions according to the different requirements of technology and mould; Rotary part disposes hydraulic jack and drives, the convenient screw rod of changing fast.
Described feeding spiro rod is arranged among the barrel, between feeding spiro rod and the injecting assembly check (non-return) valve is set, and check (non-return) valve one end communicates with injecting assembly, and the other end links to each other with feeding spiro rod, and the pressure transmission by stock media realizes sealing; The check (non-return) valve stage casing is provided with non-return cover, and non-return cover inwall is provided with axial passage, and axial passage one end communicates with injecting assembly, and the other end is communicated with the terminal external diameter of feeding spiro rod; Also be provided with more than one radial direction through hole on the non-return jacket wall, radial direction through hole is inboard to communicate with axial passage, and arranged outside has circumferential slot, is provided with piston ring in the groove; Split ring or the grading ring of piston ring for ease of changeing.The draw ratio of feeding spiro rod is 24: 1; Compression ratio is 1.45; And be two-piece design, be connected as a single entity by screw thread or latch; Barrel is that the interior cover overcoat of unlike material is composited, and the heatproof of interior cover is 570-650 ℃.
The high pressure nitrogen side of the height response accumulator of described hydraulic mechanism is connected with the nitrogen storage gas cylinder, be provided with inserted valve between the fuel-displaced side of high response accumulator and the injection cylinder oil-feed side, be provided with high frequency response servo valve in the fuel-displaced side of injection cylinder and carry out fuel-displaced SERVO CONTROL, two pressure sensor PS1 and PS2 are connected the oil-feed side and the fuel-displaced side of injection cylinder respectively, real-time detecting system pressure, high injection speed reaches 3.8m/s.The output hydraulic fluid pressure of high response accumulator and nitrogen storage gas cylinder combination control is between 120-130Bar; The main valve plug displacement of high frequency response servo valve is 6mm only, and step response 0-100% is less than 15ms; Oil-feed control loop and the design of oil return control loop runner are integrated in the oil circuit board, do not have external fluid pressure line.
Be provided with independent high-speed CPU module in the described electric mechanism and implement the control of high speed injection speed, and adopt the real-time closed-loop control algolithm.
The utility model compact conformation, low cost of manufacture, but the little energy consumption of volume is low, control accuracy is high, the easy high speed injection of debugging, and can carry out closed-loop control to injection speed, dwell pressure and plasticizing back pressure.
Description of drawings
Fig. 1 is the structural representation of the utility model one injection mechanism.
Fig. 2 is the local structure for amplifying schematic diagram among Fig. 1.
Fig. 3 is the structural representation of the utility model one screw arbor assembly.
Fig. 4 is the structure for amplifying schematic diagram of check (non-return) valve among Fig. 3.
Fig. 5 the utility model hydraulic mechanism high speed injection speed control hydraulic schematic diagram.
Fig. 6 is the utility model electric part theory diagram.
The specific embodiment
Below in conjunction with drawings and the embodiments the utility model is further described.
Referring to Fig. 1-Fig. 4, this Servocontrol semi-solid state magnesium alloy injection (mo(u)lding) machine, be provided with hollow floating piston 3 in the injection cylinder 1, be provided with low friction combination oil seal 2 between hollow floating piston 3 and the inboard wall of cylinder block, be provided with low friction combination oil seal 5 between hollow floating piston 3 and the abutment sleeve 6.The oil suction chamber of injection cylinder 1 with go out oil pocket with the injection oily control panel 4 directly be connected.During machine works, hollow floating piston 3 can drive feeding spiro rod 8 by Connection Block 7 and do linear reciprocating motion.Dispose feeding spiro rod 8 assemblies that can form the semi-solid magnesium alloy tissue morphology in the charging system.According to solid-state bits shape raw material and semisolid morphology volume variation characteristic and the magnesium alloy helical feed characteristic of being of magnesium alloy, the custom-designed feeding spiro rod 8 in conjunction with magnesium alloy heating and melting characteristic, its draw ratio is 24: 1, compression ratio is 1.45, adopts two-piece design.Be provided with check (non-return) valve 11 between injecting assembly 10 and the feeding spiro rod 8, the check (non-return) valve stage casing is provided with non-return cover 11.1, and non-return cover inwall is provided with axial passage 11.2, and axial passage one end communicates with injecting assembly 10, and the other end is communicated with feeding spiro rod 8 terminal external diameters; Also be provided with more than one radial direction through hole 11.3 on the non-return jacket wall, radial direction through hole is inboard to communicate with axial passage, and arranged outside has circumferential slot, is provided with piston ring 12 in the groove.During the machine injection, the pressure of magnesium alloy tissue passes on the piston ring 12 by axial passage 11.2 and radial direction through hole 11.3, realizes better sealing function thereby make the outside expansion of piston ring better be adjacent to barrel.Piston ring adopts the special metals manufacturing simultaneously, and piston ring 12 adopts the opening design, is convenient to change.
Referring to Fig. 5, hydraulic mechanism comprises high frequency response servo valve 16 and high response accumulator 13 compositions, and high response accumulator 13 high pressure nitrogens one side is connected with nitrogen storage gas tank 14, and the pressure oil of the required pressure stability of injection is provided; Be provided with inserted valve 15 between the fuel-displaced side of high response accumulator 13 and the injection cylinder 1 oil-feed side, high frequency response servo valve 16 is arranged on injection cylinder 1 fuel-displaced side, under electric instruction control, implement the injection speed closed-loop control in the injection process, can realize that the high speed of injection speed is accurately controlled.The injection speed response time of the present utility model, promptly injection speed can rise to 3.8m/s from 0 in the 15ms, also can drop to 0 from 3.8m/s in 15ms.
Referring to Fig. 6, be the utility model electric part theory diagram.Inject control section mainly by master controller, servo controlling card, pressure sensor and position sensor are formed.Its operation principle is: pressure that computer is given and rate signal, be input to after the servo controlling card, and after pressure compensation and restriction, adjust through PID again, output to the servo valve amplifying circuit, by promoting guide's spool, the control main valve plug moves.After oil cylinder moves, position and pressure sensor signal, in time feed back to the signal input part of servo controlling card, compare with speed and the pressure signal set, through the signal after relatively, special algorithm circuit is handled in servo controlling card again, promotes servo spool, follow the tracks of and revise the state of oil cylinder motion in time, to reach purpose smart, accurate control.Because the dominant frequency of servo controlling card is 50MHz, the resolution ratio of input and output all is 16Bit, and this has just guaranteed the pinpoint accuracy and the sensitivity of motion control process feedback, the quick and high-timeliness of response.
Claims (10)
1, a kind of Servocontrol semi-solid state magnesium alloy high speed injection molding machine, comprise clamping mechanism, injection mechanism, hydraulic mechanism, electric mechanism and frame, it is characterized in that the injection cylinder (1) in the injection mechanism is provided with hollow floating piston (3), dispose feeding spiro rod (8) assembly that can form the semi-solid magnesium alloy tissue morphology in the charging system; Hydraulic mechanism comprises inserted valve (15) and high response accumulator (13), the high speed injection speed control system is provided with high frequency response servo valve (16) in the fuel-displaced side of injection cylinder, injection cylinder oil-feed side and fuel-displaced side are provided with two pressure sensor PS1 and PS2, real-time detecting system pressure; Be provided with high-speed CPU module controls high speed injection speed in the electric mechanism, real-time closed-loop control.
2, according to the described Servocontrol semi-solid state magnesium alloy high speed injection molding machine of claim 1, it is characterized in that an end is provided with hollow floating piston (3) in the described injection cylinder (1), the other end is fixed with abutment sleeve (6), and the openend of hollow floating piston inserts between abutment sleeve outer wall and the inboard wall of cylinder block and is sealed and matched; Hollow floating piston inside and outside wall is provided with low friction combination oil seal (2,5).
3, according to claim 1 or 2 described Servocontrol semi-solid state magnesium alloy high speed injection molding machines, it is characterized in that described hollow floating piston (3) is a lightweight thin-walled piston, be provided with low friction combination oil seal (2) between the stage casing of hollow floating piston and injection cylinder (1) inwall, be provided with low friction combination oil seal (5) between the openend of hollow floating piston and the abutment sleeve (6); Hollow floating piston (3) is connected with Connection Block (7) by thrust bearing; The oil suction chamber of injection cylinder with go out oil pocket and directly be connected employing uiform section runner with the oily control panel of injection (4); The oil suction chamber of injection cylinder and fuel-displaced cavity area ratio are 2.2: 1.
4, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 1 and 2, it is characterized in that described injection mechanism is provided with self-regulating pair of rank injection position and rotary part, can regulate two kinds of different injection mechanism positions according to the different requirements of technology and mould; Rotary part disposes hydraulic jack and drives.
5, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 3, it is characterized in that described feeding spiro rod (8) is arranged among the barrel (9), check (non-return) valve (11) is set between feeding spiro rod and the injecting assembly (10), check (non-return) valve one end communicates with injecting assembly, the other end links to each other with feeding spiro rod, and the pressure transmission by stock media realizes sealing.
6, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 5, it is characterized in that described check (non-return) valve (11) stage casing is provided with non-return cover (11.1), non-return cover inwall is provided with axial passage (11.2), axial passage one end communicates with injecting assembly (10), and the other end is communicated with the terminal external diameter of feeding spiro rod (8); Also be provided with more than one radial direction through hole (11.3) on the non-return jacket wall, radial direction through hole is inboard to communicate with axial passage, and arranged outside has circumferential slot, is provided with piston ring (12) in the groove; Split ring or the grading ring of piston ring for ease of changeing.
7, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 5, the draw ratio that it is characterized in that described feeding spiro rod (8) is 24: 1; Compression ratio is 1.45; And be two-piece design, be connected as a single entity by screw thread or latch; Barrel (9) is for the interior cover overcoat of unlike material is composited, and the heatproof of interior cover is 570-650 ℃.
8, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 1 and 2, the high pressure nitrogen side that it is characterized in that the height response accumulator (13) of described hydraulic mechanism is connected with nitrogen storage gas cylinder (14), be provided with inserted valve (15) between the fuel-displaced side of high response accumulator and injection cylinder (1) the oil-feed side, be provided with high frequency response servo valve (16) in the fuel-displaced side of injection cylinder and carry out fuel-displaced SERVO CONTROL, two pressure sensor PS1 and PS2 are connected the oil-feed side and the fuel-displaced side of injection cylinder respectively, real-time detecting system pressure, high injection speed reaches 3.8m/s.
9, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 8, the output hydraulic fluid pressure that it is characterized in that described high response accumulator (13) and nitrogen storage gas cylinder (14) combination control is between 120-130Bar; The main valve plug displacement of high frequency response servo valve (16) is 6mm only, and step response 0-100% is less than 15ms; Oil-feed control loop and the design of oil return control loop runner are integrated in the oil circuit board, do not have external fluid pressure line.
10, Servocontrol semi-solid state magnesium alloy high speed injection molding machine according to claim 1 and 2 is characterized in that being provided with in the described electric mechanism independent high-speed CPU module and implements the control of high speed injection speed, and adopts the real-time closed-loop control algolithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920151391 CN201394650Y (en) | 2009-04-20 | 2009-04-20 | Servo-control semi-solid magnesium alloy high-speed injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920151391 CN201394650Y (en) | 2009-04-20 | 2009-04-20 | Servo-control semi-solid magnesium alloy high-speed injection molding machine |
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| CN201394650Y true CN201394650Y (en) | 2010-02-03 |
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| CN 200920151391 Expired - Lifetime CN201394650Y (en) | 2009-04-20 | 2009-04-20 | Servo-control semi-solid magnesium alloy high-speed injection molding machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101524747B (en) * | 2009-04-20 | 2012-09-05 | 广东伊之密精密机械股份有限公司 | Servocontrol semi-solid state magnesium alloy high speed injection molding machine |
| CN107269616A (en) * | 2017-08-11 | 2017-10-20 | 南通市腾达锻压机床厂 | A kind of cavity of resorption of high speed hydraulic press is drained the oil the application system of high frequency sound valve |
| CN114025936A (en) * | 2019-05-28 | 2022-02-08 | 圣万提注塑工业（苏州）有限公司 | Partial rotation eccentric drive for valve pin |
-
2009
- 2009-04-20 CN CN 200920151391 patent/CN201394650Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101524747B (en) * | 2009-04-20 | 2012-09-05 | 广东伊之密精密机械股份有限公司 | Servocontrol semi-solid state magnesium alloy high speed injection molding machine |
| CN107269616A (en) * | 2017-08-11 | 2017-10-20 | 南通市腾达锻压机床厂 | A kind of cavity of resorption of high speed hydraulic press is drained the oil the application system of high frequency sound valve |
| CN114025936A (en) * | 2019-05-28 | 2022-02-08 | 圣万提注塑工业（苏州）有限公司 | Partial rotation eccentric drive for valve pin |
| CN114025936B (en) * | 2019-05-28 | 2022-11-29 | 圣万提注塑工业（苏州）有限公司 | Partial rotation eccentric drive for valve pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG YIZUMI PRECISION MACHINERY CO., LTD. Free format text: FORMER NAME: |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 528300 Guangdong province Foshan city Shunde high tech Zone (Ronggui) No. 22 Keyuan Road three Patentee after: Guangdong Yizumi Precision Machinery Co., Ltd. Address before: 528300 Guangdong province Foshan city Shunde high tech Zone (Ronggui) No. 22 Keyuan Road three Patentee before: Yizumi Precision Machinery Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20100203 Effective date of abandoning: 20090420 |