CN103171105B - Injection (mo(u)lding) machine - Google Patents

Injection (mo(u)lding) machine Download PDF

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Publication number
CN103171105B
CN103171105B CN201210411745.8A CN201210411745A CN103171105B CN 103171105 B CN103171105 B CN 103171105B CN 201210411745 A CN201210411745 A CN 201210411745A CN 103171105 B CN103171105 B CN 103171105B
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CN
China
Prior art keywords
clamping force
mold clamping
action
closing
lding
Prior art date
Application number
CN201210411745.8A
Other languages
Chinese (zh)
Other versions
CN103171105A (en
Inventor
柴田达也
高桥胜
Original Assignee
住友重机械工业株式会社
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Filing date
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Priority to JP2011284098A priority Critical patent/JP5889630B2/en
Priority to JP2011-284098 priority
Application filed by 住友重机械工业株式会社 filed Critical 住友重机械工业株式会社
Publication of CN103171105A publication Critical patent/CN103171105A/en
Application granted granted Critical
Publication of CN103171105B publication Critical patent/CN103171105B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7653Measuring, controlling or regulating mould clamping forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/64Mould opening, closing or clamping devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/76013Force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76177Location of measurement
    • B29C2945/76224Closure or clamping unit

Abstract

The present invention provides a kind of injection (mo(u)lding) machine, and it can reduce the power consumption for die sinking action, and can make die sinking having stable behavior.The injection (mo(u)lding) machine (10) of the present invention possesses: mould driven for opening and closing portion (such as line motor) (28), drives mould on-off action;Matched moulds drive division (such as electric magnet) (49), drives mould assembling action;And control portion (60), control action and the action of matched moulds drive division (49) in mould driven for opening and closing portion (28).Control portion (60) includes mold clamping force monitoring portion (64), this mold clamping force monitoring portion monitors mold clamping force whether below predetermined value when releasing mold clamping force, when detecting that mold clamping force is below predetermined value by this mold clamping force monitoring portion (64), carry out die sinking action by mould driven for opening and closing portion (28).

Description

Injection (mo(u)lding) machine

Technical field

The application advocates based on Japanese patent application 2011-filed in December in 2011 26 days The priority of No. 284098.The entire disclosure of which is by with reference to being applied in this specification.

The present invention relates to a kind of injection (mo(u)lding) machine.

Background technology

Injection (mo(u)lding) machine by being filled in the cavity space of die device and making it solidify by melted resin Products formed is shaped.Die device is made up of cover half and dynamic model, at cover half and dynamic model during matched moulds Between formed cavity space.The mold closing of die device, matched moulds and die sinking are carried out by mold closing mechanism.Make The mould driven for opening and closing portion (such as line motor) including driving mould on-off action is proposed for mold closing mechanism Mold closing mechanism (such as referenced patent with the matched moulds drive division (such as electric magnet) driving mould assembling action Document 1).

Patent documentation 1: No. 05/090052 pamphlet of International Publication

Before die sinking release mold clamping force time, mold clamping force due to the operating lag of matched moulds drive division impact and not 0(zero can be dropped at once).Therefore, when mold clamping force is bigger, control portion sends sometimes Die sinking instructs.If sending die sinking instruction when mold clamping force is bigger, then for the electricity of die sinking action Power consumption uprises, or die sinking action becomes unstable.

Summary of the invention

The present invention completes in view of above-mentioned problem, its object is to provide one can reduce for The power consumption of die sinking action, and the injection (mo(u)lding) machine of die sinking having stable behavior can be made.

In order to solve above-mentioned problem, the injection (mo(u)lding) machine of a form based on the present invention is characterised by, It possesses:

Mould driven for opening and closing portion, drives mould on-off action;

Matched moulds drive division, drives mould assembling action;And

Control portion, controls action and the action of described matched moulds drive division in described mould driven for opening and closing portion,

Described control portion includes mold clamping force monitoring portion, and this mold clamping force monitoring portion is monitoring when releasing mold clamping force Whether mold clamping force is below predetermined value, when detecting that mold clamping force is in predetermined value by this mold clamping force monitoring portion Time following, carry out die sinking action by described mould driven for opening and closing portion.

Invention effect:

According to the present invention, it is possible to provide a kind of power consumption that can reduce for die sinking action, and energy Enough make the injection (mo(u)lding) machine of die sinking having stable behavior.

Accompanying drawing explanation

When Fig. 1 is to represent injection (mo(u)lding) machine mold closing based on one embodiment of the present invention and during matched moulds The figure of state.

State when Fig. 2 is to represent injection (mo(u)lding) machine die sinking based on one embodiment of the present invention Figure.

Fig. 3 is the figure of the control system representing injection (mo(u)lding) machine based on one embodiment of the present invention.

Fig. 4 is to represent to the electric current of magnet spool supply over time and based on electric magnet Mold clamping force figure over time.

Fig. 5 is to represent to the electric current of magnet spool supply over time and based on electric magnet Mold clamping force figure over time.

In figure: 10-injection (mo(u)lding) machine, 15-cover half, 16-dynamic model, 28-line motor (drive by mould opening and closing Dynamic portion), the mover of 31-line motor, the coil of 35-line motor, 48-magnet spool, 49-electric magnet (matched moulds drive division), 51-adsorption section, 55-strain transducer, 60-control portion, 61-mould opening and closing process portion, 62-matched moulds process portion, 64-mold clamping force monitoring portion, 66-mold clamping force judges Portion.

Detailed description of the invention

Hereinafter, with reference to accompanying drawing, the mode being used for implementing the present invention is illustrated, in the drawings to phase With or corresponding structure add identical or corresponding symbol and omit the description.During it addition, mold closing will be carried out The moving direction of movable pressure plate be set to front, the moving direction of movable pressure plate when carrying out die sinking is set Illustrate for rear.

When Fig. 1 is to represent injection (mo(u)lding) machine mold closing based on one embodiment of the present invention and during matched moulds The figure of state.In Fig. 1, solid line represents state during mold closing, and double dot dash line represents shape during matched moulds State.State when Fig. 2 is to represent injection (mo(u)lding) machine die sinking based on one embodiment of the present invention Figure.

In figure, 10 is injection (mo(u)lding) machine, and Fr is the framework of injection (mo(u)lding) machine 10, and Gd is for by being layed in The guiding piece that 2 guide rails on this framework Fr are constituted, 11 is fixation clip.Fixation clip 11 can set It is placed in and can move along at mould opening and closing direction (for left and right directions in figure) the upper guiding piece Gd extended Position adjustment pedestal Ba on.It addition, fixation clip 11 can be placed on framework Fr.

Opposed with fixation clip 11 and arrange movable pressure plate 12.Movable pressure plate 12 is fixed on movable base On Bb, movable base Bb can travel on guiding piece Gd.Thus, movable pressure plate 12 can phase Fixation clip 11 is moved up in mould opening and closing side.

Across predetermined space and rear fender 13 is arranged abreast with fixation clip 11 with fixation clip 11. Rear fender 13 is fixed on framework Fr via foot 13a.

4 as 2 only illustrated in the connecting rod 14(figure of connecting member in 4 connecting rods 14 Root) it is set up between fixation clip 11 and rear fender 13.Fixation clip 11 is solid via connecting rod 14 On rear fender 13.Movable pressure plate 12 is movably arranged along connecting rod 14.For the company of making The not shown guide hole that extension bar 14 runs through is formed at the portion corresponding with connecting rod 14 of movable pressure plate 12 Position.Alternatively, it is also possible to form notch part to replace guide hole.

Not shown threaded portion is formed, by spiral shell in the leading section (for right part in figure) of connecting rod 14 Female n1 screws togather and is anchored on this threaded portion, and fixation clip 11 is fixed in the leading section being thus connected bar 14 On.The rearward end of connecting rod 14 is fixed on rear fender 13.

Fixation clip 11 is installed cover half 15, movable pressure plate 12 is installed dynamic model 16, cover half 15 separate along with the advance and retreat of movable pressure plate 12 with dynamic model 16, carry out mold closing, matched moulds and open Mould.It addition, along with carrying out matched moulds, form not shown die cavity between cover half 15 and dynamic model 16 empty Between, melted resin is filled in cavity space.Die device 19 is constituted by cover half 15 and dynamic model 16.

Adsorption plate 22 is arranged abreast with movable pressure plate 12.Adsorption plate 22 is fixed via installing plate 27 On glide base Sb, glide base Sb can travel on guiding piece Gd.Thus, adsorption plate 22 more more rearward than rear fender 13 free to advance or retreat.Adsorption plate 22 can be formed by magnetic material.Separately Outward, installing plate 27 can also not have, and at this moment, adsorption plate 22 is directly fixed on glide base Sb On.

Bar 39 arranges and connects with movable pressure plate 12 in leading section for linking at rearward end and adsorption plate 22 Knot.Thus, bar 39 when mold closing along with before adsorption plate 22 and then advance and make movable pressure plate 12 Advance, retreat when die sinking along with the retrogressing of adsorption plate 22 and make movable pressure plate 12 retreat.For This, the middle body at rear fender 13 forms the guide hole 41 for making bar 39 run through.

Line motor 28 is for the mould driven for opening and closing portion making movable pressure plate 12 retreat, such as, be disposed in It is linked between the adsorption plate 22 of movable pressure plate 12 and framework Fr.It addition, line motor 28 also may be used To be disposed between movable pressure plate 12 and framework Fr.

Line motor 28 possesses stator 29 and mover 31.Stator 29 be formed as on framework Fr with draw Guiding element Gd is parallel and corresponding with the moving range of glide base Sb.Mover 31 is formed as at slip base The lower end of seat Sb is opposed with stator 29 and throughout preset range.

Mover 31 possesses magnetic core 34 and coil 35.Further, magnetic core 34 possesses towards stator 29 prominent And with multiple magnetic pole tooths 33 of preset space length formation, coil 35 package is on each magnetic pole tooth 33.Separately Outward, magnetic pole tooth 33 is formed as mutual on the direction vertical relative to the moving direction of movable pressure plate 12 Parallel.Further, stator 29 possesses not shown magnetic core and extends and not scheming of being formed on this magnetic core The permanent magnet shown.This permanent magnet is alternately formed by magnetic by making each magnetic pole of N pole and S pole. The position sensor 53 of the position of configuration detection mover 31.

If driving line motor 28, then by supplying scheduled current to the coil 35 of line motor 28 Mover 31 is retreated.As it does so, adsorption plate 22 and movable pressure plate 12 are retreated such that it is able to carry out mold closing And die sinking.Line motor 28 carries out feedback control according to the testing result of position sensor 53, so that The position of mover 31 becomes setting value.

It addition, in the present embodiment, permanent magnet is disposed on stator 29, coil 35 is joined It is located on mover 31, but also is able to be disposed on stator coil, permanent magnet is disposed in mover On.Now, coil will not move, therefore, it is possible to easily enter along with the driving of line motor 28 Row is for the distribution to coil supply electric power.

It addition, as mould driven for opening and closing portion, it is possible to use rotation motor and the rotation of rotation motor is transported The dynamic ball screw framework being converted to linear motion or the fluid-pressure cylinder such as hydraulic cylinder or air cylinder pressure etc. come Replace line motor 28.

Electromagnet unit 37 produces absorption affinity between rear fender 13 and adsorption plate 22.This absorption affinity It is transferred to movable pressure plate 12 via bar 39, and produces between movable pressure plate 12 and fixation clip 11 Mold clamping force.

It addition, by fixation clip 11, movable pressure plate 12, rear fender 13, adsorption plate 22, straight line horse Reach 28, electromagnet unit 37 and bar 39 etc. and constitute mold closing mechanism.

Electromagnet unit 37 includes the electric magnet 49 as matched moulds drive division being formed at rear fender 13 side And it is formed at the adsorption section 51 of adsorption plate 22 side.Adsorption section 51 is formed at the adsorption plane of adsorption plate 22 The predetermined portions of (front end face), such as adsorption plate 22 surround bar 39 and opposed with electric magnet 49 Part.Further, at the predetermined portions of the adsorption plane (rear end face) of rear fender 13, such as bar 39 Surrounding form the groove 45 of coil 48 accommodating electric magnet 49.Magnetic is being formed more in the inner part than groove 45 Core 46.Around magnetic core 46 package coil 48.Part outside the magnetic core 46 of rear fender 13 forms magnetic Yoke 47.

It addition, in present embodiment, be formed separately electric magnet 49, and and adsorption plate with rear fender 13 22 are formed separately adsorption section 51, but also can be formed as a part for rear fender 13 by electric magnet, and Adsorption section is formed as a part for adsorption plate 22.And, it is possible to contrary configuration electric magnet and suction Attached portion.Such as, electric magnet 49 can be set in adsorption plate 22 side, adsorption section is set in rear fender 13 side 51.Further, the number of the coil 48 of electric magnet 49 can be multiple.

In electromagnet unit 37, if supplying electric current to coil 48, then electric magnet 49 is right by driving Adsorption section 51 is adsorbed such that it is able to produce mold clamping force.

Fig. 3 is the figure of the control system of the injection (mo(u)lding) machine representing one embodiment of the present invention.Control Portion 60 such as possesses CPU and memorizer etc., is entered, by CPU, the control program being recorded in memorizer Row processes, and thus controls line motor 28 and the action of electric magnet 49.

Control portion 60 possesses mould opening and closing process portion 61 and the control electricity of the action controlling line motor 28 The matched moulds process portion 62 of the action of Magnet 49.

Mould opening and closing process portion 61 represents be supplied in straight line horse to the output of line motor electric current supply unit 71 Reach the signal of the electric current of the coil 35 of 28.Line motor electric current supply unit 71 is such as many by comprising The inverters of individual power model etc. are constituted.Line motor with electric current supply unit 71 to line motor 28 Coil 35 supply and the corresponding electric current of signal supplied from mould opening and closing process portion 61.Line motor electricity consumption Connect on stream supply unit 71 and have DC source 80.DC source 80 is by the exchange by alternating current power supply 90 Electric current is converted into the commutator 82 of the diode etc. of DC current and makes the direct current from commutator 82 output Capacitor 84 grade of electric current smoothing is constituted.

Matched moulds process portion 62 represents be supplied in electric magnet 49 to the output of electric magnet electric current supply unit 72 The signal of electric current of coil 48.Based on mold clamping force sensor (such as strain transducer described later 55) detected value, carries out feedback control to the electric current of the coil 48 being supplied in electric magnet 49, so that Mold clamping force becomes desired value.Electric magnet electric current supply unit 72 is such as by comprising multiple power model Inverters etc. are constituted.Electric magnet with coil 48 from electric current supply unit 72 to electric magnet 49 supply with from The corresponding electric current of signal of matched moulds process portion 62 supply.Electric magnet electric current supply unit 72 has change Flow to direction and the function of intensity (size) of the DC current of the coil 48 of electric magnet 49.Electromagnetism Connect on ferrum electric current supply unit 72 and have DC source 80.

Control portion 60 is also equipped with mold clamping force monitoring portion 64, and this mold clamping force monitoring portion 64 is releasing mold clamping force Time monitoring mold clamping force whether below predetermined value.Such as, mold clamping force monitoring portion 64 is detected according to being used for The detected value of the mold clamping force sensor of mold clamping force, whether monitoring mold clamping force is below predetermined value.Such as make Strain transducer with the strain (elongation) detecting the connecting rod 14 correspondingly extended with mold clamping force 55 are used as mold clamping force sensor.The strain more declining connecting rod 14 due to mold clamping force is the least, therefore Strain based on connecting rod 14 whether judge below predetermined value mold clamping force whether predetermined value with Under.As mold clamping force sensor, it is possible to use detection puts on the force-measuring sensing of the load on bar 39 The Magnetic Sensor in the magnetic field of the load transducers such as device and detection electric magnet 49 replaces strain transducer 55, the kind of mold clamping force sensor can be diversified.Such as, strain transducer can not only It is applicable to connecting rod 14, additionally it is possible to be applicable to bar 39.This is because the strain of bar 39 (amount of contraction) Proportional to mold clamping force.Further, mold clamping force monitoring portion 64 can according to away from predetermined parts mold closing time The alternate position spike (range difference) of position, whether monitoring mold clamping force is below predetermined value.Owing to mold clamping force is got over Down position difference is the least, therefore whether judges below predetermined value that whether mold clamping force exists according to alternate position spike Below predetermined value.The portion that predetermined parts can be position to be correspondingly offset from the elongation of connecting rod 14 Part.As these parts, fixation clip 11, movable pressure plate 12, adsorption plate 22 and straight line horse can be enumerated Reach the mover 31 etc. of 28.The such as alternate position spike of mover 31 can be examined by position sensor 53 Survey.In order to improve reliability, mold clamping force monitoring portion 64 can according to the detected value of mold clamping force sensor and Both alternate position spikes monitor mold clamping force whether below predetermined value.

Then, the action to the injection (mo(u)lding) machine 10 of said structure illustrates.Injection (mo(u)lding) machine 10 Various actions carry out under the control in control portion 60.

Control portion 60 controls mold closing operation by mould opening and closing process portion 61.Mould opening and closing process portion 61 exists Supplying electric current to the coil 35 of line motor 28 under the state (die opening state) of Fig. 2, making can dynamic pressure Plate 12 advances.As it is shown in figure 1, dynamic model 16 abuts against with cover half 15.Now, at rear fender 13 And between adsorption plate 22, between electric magnet 49 and adsorption section 51, i.e. form gap delta 0.It addition, Compared with mold clamping force, the power needed for mold closing is the least.

Then, control portion 60 controls matched moulds operation by matched moulds process portion 62.Matched moulds process portion 62 Supply DC current to the coil 48 of electric magnet 49, adsorption section 51 is adsorbed in electric magnet 49.Should Absorption affinity is transferred to movable pressure plate 12 via bar 39, between movable pressure plate 12 and fixation clip 11 Produce mold clamping force.Due to connecting rod 14 and mold clamping force proportionally elastic elongation, therefore as in Fig. 1 Shown in double dot dash line, fixation clip 11, movable pressure plate 12, adsorption plate 22 and line motor 28 Mover 31 slightly advance.The gap delta 1 being formed at during matched moulds between rear fender 13 and adsorption plate 22 Less than the gap delta 0 during mold closing.

Melted resin is filled in the cavity space of the die device 19 of matched moulds state.If resin cools down And solidify, then matched moulds process portion 62 adjusts the electric current supplied to the coil 48 of electric magnet 49, and solves Except mold clamping force.Owing to connecting rod 14 is along with the releasing of mold clamping force and elastic return, therefore dynamic model 16, The mover 31 of adsorption plate 22 and line motor 28 slightly retreats.

Then, control portion 60 controls die sinking operation by mould opening and closing process portion 61.Mould opening and closing process portion 61 supply electric current to the coil 35 of line motor 28, make movable pressure plate 12 retreat.Such as Fig. 2 institute Showing, dynamic model 16 retreats and carries out die sinking.

But, when releasing mold clamping force in matched moulds operation, mold clamping force prolongs due to the response of electric magnet 49 Slow impact is without dropping to 0(zero at once).The operating lag of electric magnet 49 is due to electric magnet 49(such as magnetic core 46 etc.) in the impact of magnetic force of residual and produce.

Therefore, mould opening and closing process portion 61 forbids die sinking action until being detected by mold clamping force monitoring portion 64 Go out mold clamping force below predetermined value, if detecting that mold clamping force is in predetermined value by mold clamping force monitoring portion 64 Hereinafter, then electric current is supplied to carry out die sinking action to line motor 28.Thus, relatively low at mold clamping force State under carry out die sinking action, therefore, it is possible to reduce for the power consumption of die sinking action, and energy Enough make die sinking having stable behavior.

Then, according to Fig. 4, the releasing process of mold clamping force based on matched moulds process portion 62 is said Bright.Following processes after predetermined mold clamping force is put on die device 19 and advances in die sinking OK.

Fig. 4 (a) represents to the electric current of magnet spool supply over time, Fig. 4 (b) Represent mold clamping force based on electric magnet over time.In Fig. 4, dotted line represents at moment t0By electricity Flow valuve is set as the situation of 0, and solid line represents at moment t0Situation about being inverted by the sense of current, single-point is drawn Line represents at moment t1Maintain the situation of current value.In either case, matched moulds process portion 62 is to electricity The coil 48 of Magnet 49 supplies constant DC current I0Until moment t0, thus produce predetermined matched moulds Power P0(dotted line diagram moment t in Fig. 40Data before).

Releasing predetermined mold clamping force P0Time, as in Fig. 4 (a) with shown in dotted line, matched moulds process portion 62 Can be at moment t0Block the coil 48 to electric magnet 49 and supply electric current.Moment t0After, due to No current flows in the coil 48 of electric magnet 49, therefore as in Fig. 4 (b) with shown in dotted line, matched moulds Power is gradually reduced due to the impact of the operating lag of electric magnet 49.The operating lag of electric magnet 49 by The impact of magnetic force of residual in magnetic core 46 grade of electric magnet 49 and produce.

Further, predetermined mold clamping force P is being released0Time, as in Fig. 4 (a) with shown in solid, matched moulds process Portion 62 can be at moment t0The direction making DC current inverts, and makes and produce predetermined mold clamping force P0's The DC current I in direction in opposite direction1Flow to the coil 48 of electric magnet 49.Formed and offset electric magnet The magnetic field in direction in the magnetic field of residual in 49, as in Fig. 4 (b) with under promotion mold clamping force shown in solid Fall, therefore, it is possible to the waiting time till foreshortening to die sinking.

Reciprocal DC current I1Intensity (size) the biggest, waiting time to die sinking is more Short.Waiting time is the shortest, then production efficiency is the highest, and on the other hand, the decrease speed of mold clamping force is more Hurry up, put on the variation of load of die device 19 grade the most drastically.Therefore, reciprocal unidirectional current Stream I1Intensity production efficiency to be considered and put on this two side of variation of load of die device 19 grade Face, is predetermined by test etc..Further, reciprocal DC current I1Intensity can also root According to producing predetermined mold clamping force P0Time DC current I0Intensity determine.

But, if making reciprocal DC current I1The time of flowing is elongated, then electric magnet 49 and suction Attached portion 51 can adsorb again, therefore, as in Fig. 4 (b) with shown in single dotted broken line, mold clamping force increases again Add.Furthermore it is possible to infer mold clamping force to revert to before zero the most again to increase be because in electric magnet 49 residual The magnetic field stayed is uneven, and the timing that magnetic field disappears is different along with the difference of position.

Therefore, in order to suppress mold clamping force to be further added by, when releasing mold clamping force, can be by control portion 60 The mold clamping force detection unit 66 possessed to judge mold clamping force whether in preset range (Pmin~ Pmax).This judgement detected value based on the strain transducer 55 as mold clamping force sensor and/or position The detected value (alternate position spike) putting sensor 53 is carried out, can by each scheduled time repeat into OK.

When mold clamping force detection unit 66 judges that mold clamping force is in preset range, matched moulds process portion 62 is permissible The electric current stopping the coil 48 to electric magnet 49 supplies.Stop the coil 48 to electric magnet 49 to supply The timing of electric current can in the way that mold clamping force is further added by, but preferably mold clamping force decline way in.By In stopping no current flows in coil 48 after the coil 48 of electric magnet 49 supplies electric current, therefore Mold clamping force declines with speed corresponding with the operating lag of electric magnet 49.

Then, the variation processed mold clamping force releasing based on matched moulds process portion 62 according to Fig. 5 is entered Row explanation.Following processes after predetermined mold clamping force is put on die device 19 and die sinking advance OK.

Fig. 5 (a) represents to the electric current of magnet spool supply over time, Fig. 5 (b) Represent mold clamping force based on electric magnet over time.

In variation shown in Fig. 5, releasing predetermined mold clamping force P0Time, make to flow to electric magnet 49 The intensity of the DC current of coil 48 is from moment t0Start to gradually decrease, at moment t11After becoming zero, The direction changing DC current makes the intensity of DC current be gradually increased.So, make and produce predetermined conjunction Mould power P0The DC current I in direction in opposite direction11After flowing to the coil 48 of electric magnet 49, Before die sinking, the direction flowing to the DC current of the coil 48 of electric magnet 49 is made to invert more than 1 time.Often When inverted, the maximum (I of DC amperage can be set smaller11> I12> I13> I14> I15).Reversion timing (t12< t13< t14< t15) can be electric magnet 49 and the inhaling again of adsorption section 51 Attached will start before, i.e. mold clamping force will start increase before.

So, by making the direction flowing to the DC current of the coil 48 of electric magnet 49 invert, it is possible to Reduce the impact that in electric magnet 49, the magnetic field of residual is uneven, and can promote under mold clamping force further Fall, and production efficiency can be improved further.

Further, when electric current service time is longer and mold clamping force increases again, it is possible to by making flow direction electricity The direction reversion of the DC current of the coil 48 of Magnet 49 makes mold clamping force decline once again.Therefore, figure The degree of freedom that case sets is higher, controls lighter.

Above, one embodiment of the present invention etc. is illustrated, but the present invention is not limited to above-mentioned Embodiment etc., without departing from the scope of the present invention, it is possible to the most various to above-mentioned embodiment etc. Deformation or replacement.

Such as, in the example represented with solid line in Fig. 4, at moment t0Make to flow to the line of electric magnet 49 The direction reversion of the DC current of circle 48 but it also may at moment t0Temporarily cease to electric magnet 49 Electric current supplies, after the scheduled time, by reciprocal DC current I1It is supplied in electric magnet 49 Coil 48.

Claims (4)

1. an injection (mo(u)lding) machine, it is characterised in that this injection (mo(u)lding) machine possesses:
Mould driven for opening and closing portion, drives mould on-off action;
Matched moulds drive division, drives mould assembling action;And
Control portion, controls action and the action of described matched moulds drive division in described mould driven for opening and closing portion,
Described control portion includes mold clamping force monitoring portion, and this mold clamping force monitoring portion is monitoring when releasing mold clamping force Whether mold clamping force, below predetermined value, supplies when making the magnet spool to as described matched moulds drive division The DC current reversion given is once above and detects that mold clamping force is in predetermined value by this mold clamping force monitoring portion Time following, carry out die sinking action by described mould driven for opening and closing portion.
2. injection (mo(u)lding) machine as claimed in claim 1, wherein,
Whether described mold clamping force monitoring portion monitors described mold clamping force according to the detected value of mold clamping force sensor and exists Below predetermined value.
3. injection (mo(u)lding) machine as claimed in claim 1 or 2, wherein,
Described mold clamping force monitoring portion according to away from predetermined parts mold closing time the alternate position spike of position, monitoring is described Whether mold clamping force is below predetermined value.
4. injection (mo(u)lding) machine as claimed in claim 1 or 2, wherein,
The maximum of DC amperage is set smaller whenever described reversion.
CN201210411745.8A 2011-12-26 2012-10-25 Injection (mo(u)lding) machine CN103171105B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2011284098A JP5889630B2 (en) 2011-12-26 2011-12-26 Injection molding machine
JP2011-284098 2011-12-26

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Publication Number Publication Date
CN103171105A CN103171105A (en) 2013-06-26
CN103171105B true CN103171105B (en) 2016-08-24

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JP (1) JP5889630B2 (en)
KR (1) KR101339974B1 (en)
CN (1) CN103171105B (en)
TW (1) TWI477382B (en)

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CN103407159B (en) * 2013-08-07 2015-09-23 肖根福罗格注胶技术(苏州工业园区)有限公司 A kind of automobile key gluing pressing tool

Citations (4)

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