CN101407103A - Injection mould servo synchronous automatic thread demoulding mechanism and control method thereof - Google Patents
Injection mould servo synchronous automatic thread demoulding mechanism and control method thereof Download PDFInfo
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- CN101407103A CN101407103A CNA2008102192458A CN200810219245A CN101407103A CN 101407103 A CN101407103 A CN 101407103A CN A2008102192458 A CNA2008102192458 A CN A2008102192458A CN 200810219245 A CN200810219245 A CN 200810219245A CN 101407103 A CN101407103 A CN 101407103A
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- thread
- motor
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- servomotor
- thread demoulding
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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
- B29C45/26—Moulds
- B29C45/2618—Moulds having screw-threaded mould walls
- B29C45/262—Moulds having screw-threaded mould walls provided with unscrewing drive means
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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
- B29C45/40—Removing or ejecting moulded articles
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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
- B29C45/76—Measuring, controlling or regulating
- B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
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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
- 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
Abstract
The invention discloses a servo synchronic automatic thread demoulding mechanism for an injection mould. The thread demoulding mechanism comprises a mould frame, a fixed molding board, a push board, a movable molding board, a threaded core and an injection molded part, wherein the threaded core and the push board are in transmission connection with a rotation mechanism and a lifting mechanism respectively. Under the control of a control system, the rotation mechanism screws out threads at an axial speed consistent with a speed at which the lifting mechanism pushes out the push board. The thread demoulding mechanism adopts a stepper motor for thread demoting and a novel mould thread demoulding synchronization mechanism under servocontrol to solve a current quality problem caused by lack of synchronization during thread demoulding. The thread demoulding mechanism is adaptive to different thread pitches and different plastic workpiece materials, overcomes the limitation on the prior mechanical thread demoulding mechanism and has obvious advantages in technology, good using value and market prospect. The thread demoulding mechanism has the advantages of simple and reasonable structure, high efficiency, high quality, convenient operation and wide application range.
Description
Technical field
The present invention relates to a kind of thread mechanism that takes off of injection mould, particularly a kind of injection mould servo synchronous automatic thread demoulding mechanism and control method thereof.
Background technology
In the plastics mould, taking off screw thread automatically with motor or oil motor driven gear is a kind of screw method of taking off of using always.These mechanism and dependency structures that take off threaded portion have similarity, and deviating from by two effects of screw thread realizes that as shown in fig. 1, push pedal 200 realizes the auxiliary release of thread rotation stopping and part, and rotatable core 400 rotates and withdraws from screw thread.A ubiquitous problem is in the thread mechanism but take off automatically at these, and it is inconsistent that the speed to introduce of push pedal 200 and thread core 400 rotate the axial velocity of part 100 threaded portions, causes and damage the plastic screw thread when taking off screw thread.This commonly used taking off automatically in the thread mechanism, the release of push pedal 200 be by spring 300 be used for realize.Because the power of spring changes with stroke, and the reliability deficiency of spring force, so this reliability of taking off thread mechanism automatically is also not enough, especially under the situation that reach is long, the difficulty of this mechanism is bigger, and push pedal ejects the initial stage spring force and crosses conference and cause screw thread to drag flower, ejects later stage ejecting force deficiency and causes the push pedal can not spline with separating of part, so be difficult to make qualified products, aborning also influence production because it is unstable.
Plastic Parts with Thread pickoff in a kind of injection mould is disclosed among the Chinese patent literature CN1583395A, it is characterized in that: the lead screw transmission pair is housed between moving platen and solid plate, be connected with screw mandrel in the centre bore of described solid plate, screw mandrel one end is provided with pillow block, pillow block and solid plate are affixed, and be connected with the spline pin, the other end of screw mandrel inserts in the push pedal thread bush, described moving platen center is provided with through hole, moving plate C lower surface in the moving platen is provided with the gear seam, at moving plate A, moving plate B, be penetrated with screw between the moving plate C central through hole, the affixed driving gear in screw rear end, moving plate D is pressed on the pressure bearing that is socketed on the screw rear end, driving gear and the planetary engagement of driven gear that is connected on the core, and described push pedal thread bush is connected movingly with die bottom plate and is affixed with push pedal.This structure has driven the rising of core rotation and moving platen by the synchronous rotation of screw mandrel and screw, realize Plastic Parts with Thread automatic demoulding in the injection mould, but because screw mandrel, screw, core and moving platen are in the annexation of an interlock, the pitch of screw mandrel, screw, and the number of teeth of the driven gear on affixed driving gear in screw rear end and the core is a fixed value, so this structure scope of application is little, and precision is low.
Summary of the invention
Purpose of the present invention aims to provide a kind of high efficiency, high-quality, injection mould servo synchronous automatic thread demoulding mechanism and control method thereof easy to operate, applied widely, to overcome weak point of the prior art.
A kind of injection mould servo synchronous automatic thread demoulding mechanism by this purpose design, comprise mould bases, solid plate, push pedal, moving platen, thread core and be provided with the moulding of screw thread, its architectural feature is that thread core and push pedal are in transmission connection with rotating mechanism and elevating mechanism respectively, two mechanisms control by control system, and the speed of releasing push pedal with axial velocity and the elevating mechanism of realizing rotating mechanism back-out screw thread is consistent.
Described thread core is connected with rotating shaft, and is in transmission connection by rotating shaft and rotating mechanism; Rotating mechanism comprises motor and power transmission shaft, and power transmission shaft is connected by sprocket wheel, belt pulley, worm and gear, gear or screw mandrel with motor shaft.The rotating shaft lower end is fixedly connected with driven gear, with the driving gear engagement of power transmission shaft upper end, the power transmission shaft lower end is provided with drive sprocket, and is connected with chain gear transmission on being connected motor shaft by chain, motor is stepper motor, servomotor or hydraulic motor, is electrically connected with control system.
Described elevating mechanism comprises motor, worm and gear transmission and rack-and-pinion transmission, motor is servomotor, stepper motor or hydraulic motor, is electrically connected with control system, and its motor shaft is in transmission connection by worm and wheel, gear is fixedly installed on the worm-wheel shaft, meshes with tooth bar; Tooth bar upper end is connected with push pedal, the unsettled setting in lower end or be slidingly connected with the base plate of mould bases; The corresponding moulding of push pedal end face bottom surface is provided with at least two positioning convex points.Above-mentioned worm and gear transmission also can be replaced by the bevel gear transmission; The rack-and-pinion transmission replaces by lead screw transmission is secondary.
Be provided with ejector retainner plate and push rod between described tooth bar and the push pedal, ejector retainner plate is fixedlyed connected with the tooth bar upper end; The push rod lower end is fixedly installed on the ejector retainner plate, fixedlys connected with push pedal by adjusting nut in the upper end.
Described control system comprises that by the Programmable Logic Controller that is electrically connected also and text editor Programmable Logic Controller has two-way high-speed pulse passage at least, and wherein two-way high-speed pulse passage is connected with the actuator electrical of the motor of rotating mechanism and elevating mechanism respectively.
The motor of described rotating mechanism and elevating mechanism is respectively stepper motor and servomotor, and is electrically connected with Programmable Logic Controller by step actuator and servo-driver respectively; Introduce the detecting sensor that stepping is rotated in the step actuator, detecting sensor is near the switch detector, is electrically connected with Programmable Logic Controller, adjusts servomotor and stepper motor synchronous operation to differentiate.
Press the control method of the injection mould servo synchronous automatic thread demoulding mechanism of this purpose design, it is characterized in that servo-driver and step actuator power on be ready to complete after, Programmable Logic Controller begins data to be handled, the P-pulse number that parameter that computing client is set and servo-driver and step actuator will be carried out, then, send the ON signal by Programmable Logic Controller to servo-driver, make servo-driver enter the state of standing ready, wait for the order that ejects of injection machine; Receive injection machine when Programmable Logic Controller and eject command signal, simultaneously send out pulse command to servo, step actuator, and according to position, speed near switch detector signal calculated step, adjust the synchronous effect of servomotor on this basis, make stepper motor and servomotor arrive desired locations simultaneously, eject the moulding screw thread synchronously; At last, the servomotor counter-rotating resets to the home position, sends to eject to injection machine and finishes signal.
Described moulding screw thread has contraction, it is not in place a little to break away from, and adjusts shrinkage factor by the scene from text editor correction.
There is minim gap between rotating mechanism that described stepper motor and servomotor are controlled and the elevating mechanism, make the real motion time started of two mechanisms have fine difference, so control system is provided with the small adjustment amount Tw of another one, by adjusting the size of Tw, can adjust the time difference of two system's startings.
The present invention is taking off under the screw thread situation with stepper motor, is equipped with servo-controlled novel die and takes off the screw thread lazy-tongs, the asynchronous various quality problems that cause when taking off screw thread thereby solution preferably is present.Can adapt to different pitch, different plastics part material, break through the restriction that traditional mechanical type takes off helicitic texture, have tangible technical advance.Using value and market prospects are preferably arranged.It is simple and reasonable, high efficiency, high-quality, easy to operate, applied widely.
Description of drawings
Fig. 1 is the prior art structural representation.
Fig. 2 is one embodiment of the invention structural representation.
Fig. 3 is the local main TV structure schematic diagram of rotating mechanism.
Fig. 4 looks up structural representation for Fig. 3 part.
Fig. 5 is elevating mechanism partial structurtes schematic diagrames.
Fig. 6 is the local main TV structure schematic diagram of elevating mechanism.
Fig. 7 is a control flow line frame graph of the present invention.
Fig. 8 is servo-drive system connection line figure of the present invention.
Fig. 9 is the control line schematic diagram of Programmable Logic Controller and step-by-step system and servo-drive system.
Figure 10 is the control elementary diagram of injection machine mould emptier.
Among the figure: 1 is the injection moulding cast gate, 2 is top board, 3 is solid plate, 3.1 be die cavity, 4 are push pedal, 4.1 be positioning convex point, 5 is moving platen, 6 is stepper motor, 6.1 motor shaft, 7 is first holder, 8 is base plate, 9 is ejector retainner plate, 10 is the ejector retainner plate guide pillar, 11 is side plate, 12 is bearing spider, 13 is worm gear, 13.1 be worm-wheel shaft, 14 is worm screw, 15 is worm shaft, 16 is second holder, 17 is servomotor, 18 is sprocket wheel, 19 is chain, 20 is drive sprocket, 21 is power transmission shaft, 22 is driving gear, 23 is driven gear, 24 are rotating shaft, 25 is thread core, 26 is moulding, 27 is adjusting nut, 28 is push rod, 29 is tooth bar, 30 is sliding sleeve, 31 is gear.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 2-Fig. 6, this injection mould servo synchronous automatic thread demoulding mechanism, comprise mould bases, solid plate 3, push pedal 4, moving platen 5, thread core 25 and be provided with the moulding 26 of screw thread, thread core 25 and push pedal 4 are in transmission connection with rotating mechanism and elevating mechanism respectively, two mechanisms control by control system, and the speed of releasing push pedal with axial velocity and the elevating mechanism of realizing rotating mechanism back-out screw thread is consistent.Mould bases comprises top board 2, side plate 11 and base plate 8, and top board, solid plate 3, push pedal 4, moving platen 5, side plate are connected from top to bottom successively with base plate, and top board 2 tops are provided with injection moulding cast gate 1 and are communicated with the die cavity 3.1 of solid plate, with processing moulding 26; The corresponding moulding of push pedal 4 end faces bottom surface is provided with two positioning convex points 4.1; Be provided with rotating thread core 25 in the moulding, thread core is fixedlyed connected with rotating shaft 24 upper ends, and the rotating shaft lower end passes push pedal 4 and moving platen 5 bottom surfaces successively, is in transmission connection with rotating mechanism.Rotating mechanism comprises stepper motor 6 and power transmission shaft 21, and stepper motor is electrically connected with control system, and is fixedly installed on mould bases and/or the moving platen 5 by first holder, and power transmission shaft and motor shaft 6.1 are connected by sprocket wheel.Power transmission shaft 21 upper ends are provided with driving gear 22, and the driven gear 23 that fixedly installs with rotating shaft 24 lower ends meshes; The power transmission shaft lower end is provided with drive sprocket 20, and is in transmission connection by chain 19 and the sprocket wheel 18 that is connected on the motor shaft 6.1.
Elevating mechanism comprises servomotor, worm and gear transmission and rack-and-pinion transmission, servomotor is electrically connected with control system, and be fixedly installed on the mould bases side plate 11 by second holder 16, its motor shaft and worm shaft 15 are in transmission connection, the worm shaft two ends are connected with the bearing spider 12 that is fixedly installed on side plate 11, worm screw 14 and worm gear 13 engagements, and worm-wheel shaft 13.1 penetrates side plate 11 inboards, fixedly connected wheel and rack 29 engagements with gear 31.Tooth bar 29 upper ends are connected with push pedal 4, and lower end and base plate 8 are slidingly connected, and the corresponding tooth bar of base plate is provided with a hole of keeping away of band sliding sleeve 30.Also be provided with ejector retainner plate 9 and push rod 28 between tooth bar 29 and the push pedal 4, ejector retainner plate is fixedlyed connected with the tooth bar upper end, and the push rod lower end is fixedly installed on the ejector retainner plate, fixedlys connected with push pedal by adjusting nut 27 in the upper end.Be set with four ejector retainner plate guide pillars 10 on the base plate 8, be slidingly connected with ejector retainner plate 9 guiding.
Referring to Fig. 8-Figure 10, control system comprises Programmable Logic Controller and the text editor by being electrically connected, Programmable Logic Controller has two-way high-speed pulse passage at least, and wherein two-way high-speed pulse passage is electrically connected with the step actuator and the servo-driver of stepper motor and servomotor respectively.Introduce the detecting sensor that stepping is rotated in the step actuator, detecting sensor is near the switch detector, is electrically connected with Programmable Logic Controller, adjusts servomotor and stepper motor synchronous operation to differentiate.
Referring to Fig. 7, the control method of injection mould servo synchronous automatic thread demoulding mechanism: after servo-driver and step actuator power on and be ready to complete, Programmable Logic Controller begins data to be handled, the P-pulse number that parameter that computing client is set and servo-driver and step actuator will be carried out, then, send the ON signal by Programmable Logic Controller to servo-driver, make servo-driver enter the state of standing ready, wait for the order that ejects of injection machine; Receive injection machine when Programmable Logic Controller and eject command signal, simultaneously send out pulse command to servo, step actuator, and according to position, speed near switch detector signal calculated step, adjust the synchronous effect of servomotor on this basis, make stepper motor and servomotor arrive desired locations simultaneously, eject the moulding screw thread synchronously; At last, the servomotor counter-rotating resets to the home position, sends to eject to injection machine and finishes signal.The moulding screw thread has contraction, it is not in place a little to break away from, and adjusts shrinkage factor by the scene from text editor correction.There is minim gap between rotating mechanism that stepper motor and servomotor are controlled and the elevating mechanism, make the real motion time started of two mechanisms have fine difference, so control system is provided with the small adjustment amount Tw of another one, by adjusting the size of Tw, can adjust the time difference of two system's startings.
Input data computing method in the text editor: establishing injection-moulded plastic part pitch is P, and the stepper motor rotating speed is Nb, and the servomotor rotating speed is Ns.According to stepper motor transmission mechanism among Fig. 3, sprocket ratio is 1: 1, and the gearratio of gear also is 1: 1, so stepper motor is when rotating a circle, and part takes off screw thread one circle, and promptly part is deviate from the distance of a pitch value P; Push pedal simultaneously must also be finished and release distance P t, when Pt=P, realizes that promptly part deviates from a pitch value, and a pitch value is released in push pedal synchronously.According to the transmission of servomotor push pedal system among Fig. 6, the modulus of rack pinion is m=2, and the number of teeth is 21, and the tooth pitch of tooth bar is π m=3.14 * 2=6.28; Worm gear line number is 1, the worm screw number of teeth is 50, like this, when distance P t=P was released in push pedal, tooth bar displacement was P, the number of teeth that tooth bar moves is P/ (π m), the number of turns that rack pinion rotates is [P/ (π m)]/21, and this number of turns is exactly the number of turns that worm gear rotates, and multiply by the number of teeth of worm gear with this number of turns, just obtain the rotation number of turns [P/ (π m)]/21 * 50 of servomotor, obtain synchronized relation formula: Ns=[P/ (π m) thus]/21 * 50 * Nb.
At above moulding thread pitch, control system is wanted and can be sent when ejecting signal at injection machine, guarantees that the stepper motor gear revolves when turning around, servomotor rotation [P/ (π m)]/21 * 50 circle.Consider actual die trial situation, control system can be adjusted the thread pitch value of input plastic immediately, and from above-mentioned synchronous formula as can be seen, this pitch value has determined two rotating speed of motor ratios; This pitch value can be carried out theoretical calculation before die trial begins, promptly the working of plastics thread pitch multiply by the theoretical shrinkage factor of plastics.Around this theoretical value, do adjustment by a small margin during actual die trial, take off screw thread and eject effect with what obtain.
Consider that there is minim gap in actual machine mechanism, stepper motor and servomotor start after receiving signal simultaneously in theory, but in fact there is fine difference in the real motion time started of two systems, so control system is provided with the small adjustment amount Tw of another one, by adjusting the size of Tw, can adjust the time difference of two system's startings.Like this, actual being adjusted into of synchronous formula of two systems:
Ns＝Tw+[P/(πm)]/21×50×Nb。
Claims (10)
1. injection mould servo synchronous automatic thread demoulding mechanism, comprise mould bases, solid plate (3), push pedal (4), moving platen (5), thread core (25) and be provided with the moulding (26) of screw thread, it is characterized in that thread core and push pedal are in transmission connection with rotating mechanism and elevating mechanism respectively, two mechanisms control by control system, and the speed of releasing push pedal with axial velocity and the elevating mechanism of realizing rotating mechanism back-out screw thread is consistent.
2. injection mould servo synchronous automatic thread demoulding mechanism according to claim 1 is characterized in that described thread core is connected with rotating shaft (24), and is in transmission connection by rotating shaft and rotating mechanism; Rotating mechanism comprises motor and power transmission shaft (21), and power transmission shaft is connected by sprocket wheel, belt pulley, worm and gear, gear or screw mandrel with motor shaft (6.1).
3. injection mould servo synchronous automatic thread demoulding mechanism according to claim 2, it is characterized in that described rotating shaft lower end is fixedly connected with driven gear (23), driving gear (22) engagement with the power transmission shaft upper end, the power transmission shaft lower end is provided with drive sprocket (20), and be in transmission connection by chain (19) and the sprocket wheel (18) that is connected on the motor shaft, motor is stepper motor (6), servomotor or hydraulic motor, is electrically connected with control system.
4. injection mould servo synchronous automatic thread demoulding mechanism according to claim 1, it is characterized in that described elevating mechanism comprises motor, worm and gear transmission and rack-and-pinion transmission, motor is servomotor (17), stepper motor or hydraulic motor, be electrically connected with control system, its motor shaft is in transmission connection by worm screw (14) and worm gear (13), gear (31) is fixedly installed on the worm-wheel shaft (13.1), meshes with tooth bar (29); Tooth bar upper end is connected with push pedal, the unsettled setting in lower end or be slidingly connected with the base plate of mould bases; The corresponding moulding of push pedal end face bottom surface is provided with at least two positioning convex points (4.1).
5. injection mould servo synchronous automatic thread demoulding mechanism according to claim 4 is characterized in that being provided with between described tooth bar and the push pedal ejector retainner plate (9) and push rod (28), and ejector retainner plate is fixedlyed connected with the tooth bar upper end; The push rod lower end is fixedly installed on the ejector retainner plate, fixedlys connected with push pedal by adjusting nut (27) in the upper end.
6. injection mould servo synchronous automatic thread demoulding mechanism according to claim 1, it is characterized in that described control system comprises Programmable Logic Controller and the text editor by being electrically connected, Programmable Logic Controller has two-way high-speed pulse passage at least, and wherein two-way high-speed pulse passage is connected with the actuator electrical of the motor of rotating mechanism and elevating mechanism respectively.
7. injection mould servo synchronous automatic thread demoulding mechanism according to claim 6, the motor that it is characterized in that described rotating mechanism and elevating mechanism is respectively stepper motor and servomotor, and is electrically connected with Programmable Logic Controller by step actuator and servo-driver respectively; Introduce the detecting sensor that stepping is rotated in the step actuator, detecting sensor is near the switch detector, is electrically connected with Programmable Logic Controller, adjusts servomotor and stepper motor synchronous operation to differentiate.
8. the control method of injection mould servo synchronous automatic thread demoulding mechanism according to claim 1, it is characterized in that servo-driver and step actuator power on be ready to complete after, Programmable Logic Controller begins data to be handled, the P-pulse number that parameter that computing client is set and servo-driver and step actuator will be carried out, then, send the ON signal by Programmable Logic Controller to servo-driver, make servo-driver enter the state of standing ready, wait for the order that ejects of injection machine; Receive injection machine when Programmable Logic Controller and eject command signal, simultaneously send out pulse command to servo, step actuator, and according to position, speed near switch detector signal calculated step, adjust the synchronous effect of servomotor on this basis, make stepper motor and servomotor arrive desired locations simultaneously, eject the moulding screw thread synchronously; At last, the servomotor counter-rotating resets to the home position, sends to eject to injection machine and finishes signal.
9. control method according to claim 8 is characterized in that described moulding screw thread has contraction, breaks away from not in placely a little, adjusts shrinkage factor by the scene from text editor correction.
10. control method according to claim 8, it is characterized in that having minim gap between rotating mechanism that described stepper motor and servomotor are controlled and the elevating mechanism, make the real motion time started of two mechanisms have fine difference, so control system is provided with the small adjustment amount Tw of another one, by adjusting the size of Tw, can adjust the time difference of two system's startings.
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| CN2008102192458A CN101407103B (en) | 2008-11-15 | 2008-11-15 | Injection mould servo synchronous automatic thread demoulding mechanism and control method thereof |
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| CN2008102192458A CN101407103B (en) | 2008-11-15 | 2008-11-15 | Injection mould servo synchronous automatic thread demoulding mechanism and control method thereof |
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| CN101407103B CN101407103B (en) | 2011-07-27 |
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| CN101875227A (en) * | 2009-04-30 | 2010-11-03 | 厦门捷信达模具塑胶有限公司 | Improved plastic mould thread removing device |
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| CN101875227A (en) * | 2009-04-30 | 2010-11-03 | 厦门捷信达模具塑胶有限公司 | Improved plastic mould thread removing device |
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