CN101992531B - A mold clamping device and an operating method of the mold clamping device - Google Patents

A mold clamping device and an operating method of the mold clamping device Download PDF

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Publication number
CN101992531B
CN101992531B CN201010231720.0A CN201010231720A CN101992531B CN 101992531 B CN101992531 B CN 101992531B CN 201010231720 A CN201010231720 A CN 201010231720A CN 101992531 B CN101992531 B CN 101992531B
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CN
China
Prior art keywords
pressure cylinder
cylinder chamber
matched moulds
mold closing
clamping
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CN201010231720.0A
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Chinese (zh)
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CN101992531A (en
Inventor
神野镇绪
林真二
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株式会社名机制作所
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Priority to JP2009188168A priority Critical patent/JP5084797B2/en
Priority to JP2009-188168 priority
Application filed by 株式会社名机制作所 filed Critical 株式会社名机制作所
Publication of CN101992531A publication Critical patent/CN101992531A/en
Application granted granted Critical
Publication of CN101992531B publication Critical patent/CN101992531B/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
    • B29C45/64Mould opening, closing or clamping devices
    • B29C45/67Mould opening, closing or clamping devices hydraulic
    • 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
    • B29C45/641Clamping devices using means for straddling or interconnecting the mould halves, e.g. jaws, straps, latches

Abstract

Provided is a mold clamping device by using a mold clamping pressure cylinder, capable of rapidly moving the mold clamping pressure cylinder toward two directions without size maximization of pumps or valves in a liquid pressure loop so as to shorten a period after clamping a locknut and a locking part. The mold clamping device (12), in which a movable metal mold (20) is close to or conjoined to a fixed metal mold (15) by a mold switching mechanism (26) and the mold is clamped by the mold clamping pressure cylinder (22) after clamping the locknut (29) and the locking part (25), is provided with a first pressure cylinder chamber (38) for mold clamping, a second pressure cylinder chamber (39) and a third pressure cylinder chamber (41) which pressure-receiving areas are less than that of a first pressure cylinder chamber (38), by using a mold clamping piston (32) of a mold clamping pressure cylinder (22) as a boundary.

Description

The method of operating of mold closing mechanism and mold closing mechanism

Technical field

The present invention relates to by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, carry out the mold closing mechanism of matched moulds and the method for operating of mold closing mechanism by clamping pressure cylinder.

Background technology

As the mold closing mechanism using in injection machine, exist as toggle mechanism by same mechanism carry out the device of mould switching and matched moulds and by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or be connected to by after halfnut and fastener engagement, carry out the mold closing mechanism of matched moulds by clamping pressure cylinder.As the type of the latter's use halfnut and clamping pressure cylinder, known have patent documentation 1 to the structure of recording in patent documentation 5.The structure of the type shown in Fig. 1 of patent documentation 1 is being subject to the upper clamping pressure cylinder of installing of platen (bracket 30), is provided with halfnut in the front of the pressure head cylindraceous of clamping pressure cylinder.On the back side of movable plate, be fixed with on the other hand mechanical pressure head (mould opens and closes pressure cylinder 12), in the barrel surface of mechanical pressure head, be formed with the groove that halfnut can engage.In addition, be provided with in the inside of above-mentioned mechanical pressure head at mould and open and close with the mould switching mechanism moving under servo motor effect.The mold closing mechanism of the type small-sized to common in medium-sized mold closing mechanism.In addition, the structure of the type shown in Fig. 1 of patent documentation 2 is provided with mould opening and closing device between fixed disk and movable plate, in the rear side of movable plate, the driving-disc that is provided with mold closing mechanism is installed.And, be provided with halfnut in the rear side of driving-disc.In addition, on the tie-rod (pull bar) of inserting in movable plate, be formed with the threaded portion that halfnut can engage.

And then the structure of the type shown in patent documentation 3 is provided with clamping pressure cylinder on four jiaos of fixed disk, on the pressure head of clamping pressure cylinder, be installed with the tie-rod that is formed with cannelure.And, be located at halfnut engagement on movable plate in the cannelure of tie-rod.In addition, in patent documentation 3, be additionally provided with secondary stress cylinder with clamping pressure cylinder, before the matched moulds operation in the time of work running, make pressure head get back to revised position by above-mentioned secondary stress cylinder.But patent documentation 3 is owing to being in the time making movable press head by secondary stress cylinder, making the oil in clamping pressure cylinder be discharged to the structure of the type in draining tunnel, so be the also structure of spended time of movement that needs larger-size valve etc., pressure head.In addition, patent documentation 3 is not in the dish of mold closing mechanism but the elongated problem of total length that secondary stress cylinder, device need to be installed independently in outside in addition.

As the structure of reply the problems referred to above, the known structure that has the type shown in patent documentation 4.In patent documentation 4, the part that is equivalent to the secondary stress cylinder of patent documentation 3 is accommodated in dish as path pressure cylinder.In addition, patent documentation 4 is to have eliminated the structure that under the state of hydraulic pressure difference, above-mentioned path pressure cylinder is moved matched moulds side is communicated with the large grease chamber of die sinking side.But, patent documentation 4 makes matched moulds side and the large grease chamber of die sinking side be identical pressure, be undertaken moving to the movement of die sinking direction by the difference of hydraulic operation area during for die sinking, but now need the pressure rise of the large grease chamber that makes both, the slack-off problem of action while having die sinking.And then, about patent documentation 5, be also the structure that is provided with path pressure cylinder in the clamping pressure cylinder being located in dish.And, in patent documentation 5, in the time of die sinking, in the time working oil being transported in path pressure cylinder chamber, make the 1st pressure cylinder chamber of matched moulds side of large footpath pressure cylinder and the 2nd pressure cylinder chamber of die sinking side be communicated with, by making pressure oil circulation realize the minimizing of the flow of the working solution of supplying with to clamping pressure cylinder.But, about patent documentation 5, have in the time that tie-rod is returned to original state in order to supply with working oil and to need jumbo working oil and the slack-off problem of moving to the 1st pressure cylinder chamber of large footpath pressure cylinder.

[patent documentation 1] JP 2001-212828 communique (0029, Fig. 1)

[patent documentation 2] JP 2002-103403 communique (0012,0013, Fig. 1)

[patent documentation 3] Unexamined Patent 8-276482 communique (0021, Fig. 1)

[patent documentation 4] JP 2002-127216 communique (0023,0024,0025,0026, Fig. 2)

[patent documentation 5] JP 2007-167897 communique (0046, Fig. 4)

Although the technology of above-mentioned patent documentation 4 and patent documentation 5 has the structure being communicated with as the 1st pressure cylinder chamber of the clamping pressure cylinder chamber of the matched moulds side of clamping pressure cylinder and the 2nd pressure cylinder chamber of die sinking side etc., but owing to not thering is the pressure cylinder chamber of path both of matched moulds side, die sinking side, so in the time making clamping pressure cylinder to way moving, can not move with the working oil of less flow respectively, the supply spended time of the working oil of grease chamber, so can not shorten the forming period time altogether.Or, if want to shorten the forming period time altogether, need the size preparation of pump or the valve etc. of hydraulic circuit in the short time, to supply with the structure of a large amount of working oils, can not make above-mentioned hydraulic circuit become compact.

Summary of the invention

Thereby, in the present invention, in view of the above problems, object be to provide a kind of make by mould switching mechanism movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, undertaken in the mold closing mechanism of matched moulds by clamping pressure cylinder, the size that do not make pump or the valve etc. of hydraulic circuit maximizes and can shorten mold closing mechanism and the method for operating thereof of forming period.

Mold closing mechanism described in technical scheme 1 of the present invention, be by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, carry out the mold closing mechanism of matched moulds by clamping pressure cylinder, it is characterized in that, can open and close direction with respect to mobile matched moulds rim mould and be provided with movably movable plate, be provided with clamping pressure cylinder at above-mentioned mobile matched moulds dish, the pressure head of this clamping pressure cylinder is fixed in the back side of movable plate; In a side of the closing piston of above-mentioned clamping pressure cylinder, the rear side of mobile matched moulds dish is provided with the 1st pressure cylinder chamber that matched moulds uses and is supplied to working oil and makes above-mentioned pressure head move and movable metal pattern be advanced and the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber that compression area is less than the 1st pressure cylinder chamber to mold closing direction; In the opposite side of above-mentioned closing piston, i.e. movable plate side, be provided with compression area than the 3rd little pressure cylinder chamber of above-mentioned the 1st pressure cylinder chamber and be connected to the 4th pressure cylinder chamber on above-mentioned the 1st pressure cylinder chamber via pipeline and valve; In the time that clamping pressure cylinder mold closing operation makes pressure head move to mold closing direction; working oil is supplied with in the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber; and the working oil to major general the 4th pressure cylinder chamber is carried to the 1st pressure cylinder chamber, and closing piston is moved to mold closing direction.Thereby, can not make the size of pump or the valve etc. of hydraulic circuit maximize and clamping pressure cylinder is moved more quickly to two directions, can shorten forming period.

The method of operating of the mold closing mechanism described in technical scheme 3 of the present invention, be by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, carry out the method for operating of the mold closing mechanism of matched moulds by clamping pressure cylinder, it is characterized in that, can open and close direction with respect to mobile matched moulds rim mould and be provided with movably movable plate, be provided with clamping pressure cylinder at above-mentioned mobile matched moulds dish, the pressure head of this clamping pressure cylinder is fixed in the back side of movable plate; In a side of the closing piston of above-mentioned clamping pressure cylinder, the rear side of mobile matched moulds dish is provided with the 1st pressure cylinder chamber that matched moulds uses and is supplied to working oil and makes above-mentioned pressure head move and movable metal pattern be advanced and the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber that compression area is less than the 1st pressure cylinder chamber to mold closing direction; In the opposite side of above-mentioned closing piston, i.e. movable plate side, be provided with compression area than the 3rd little pressure cylinder chamber of above-mentioned the 1st pressure cylinder chamber and be connected to the 4th pressure cylinder chamber on above-mentioned the 1st pressure cylinder chamber via pipeline and valve; In the time that clamping pressure cylinder mold closing operation makes pressure head move to not busy mould direction, working oil is supplied with in the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber, and the working oil to major general the 4th pressure cylinder chamber is carried to the 1st pressure cylinder chamber, and closing piston is moved to mold closing direction; In the time of die sinking, working oil is supplied with in the 3rd pressure cylinder chamber, and the working oil of the 1st pressure cylinder chamber is at least carried to the 4th pressure cylinder chamber, closing piston is moved to die sinking direction.Thereby, can not make the size of pump or the valve etc. of hydraulic circuit maximize and clamping pressure cylinder is moved more quickly to two directions, can shorten forming period.

The method of operating of mold closing mechanism of the present invention or mold closing mechanism is take the closing piston of above-mentioned clamping pressure cylinder as border; if possess the 1st little working oil that is supplied in pressure cylinder chamber that compression area is used than matched moulds, produce the 2nd pressure cylinder chamber and the 3rd pressure cylinder chamber of thrust towards closing piston side; so can not make the size of pump or the valve etc. of hydraulic circuit maximize and clamping pressure cylinder is moved more quickly to two directions, can shorten forming period.

Accompanying drawing explanation

Fig. 1 is the partial sectional view of the mold closing mechanism of present embodiment.

Fig. 2 is the clamping pressure cylinder of mold closing mechanism and the figure of its hydraulic circuit that represents present embodiment.

Fig. 3 represents the high speed mold closing operation of the mold closing mechanism of present embodiment, the figure of high speed die sinking operation.

Fig. 4 is the figure that represents the clamping pressure cylinder mold closing operation of the mold closing mechanism of present embodiment.

Fig. 5 is the figure that represents the matched moulds operation of the mold closing mechanism of present embodiment.

Fig. 6 is the figure that represents the extrusion operation of the mold closing mechanism of present embodiment.

Fig. 7 is the powerful die sinking operation of mold closing mechanism and the figure of clamping pressure cylinder die sinking operation that represents present embodiment.

Fig. 8 is the flow chart that represents the action of the mold closing mechanism of present embodiment.

Fig. 9 is the figure that represents the clamping pressure cylinder of the mold closing mechanism of another embodiment.

Description of reference numerals

11 injection machines

12 mold closing mechanisms

15 fixing metal moulds

18 move matched moulds dish

20 movable metal patterns

21 movable plates

22 clamping pressure cylinders

23 pressure heads

25 tie-rods

25a fastener

29 halfnuts

32 closing pistons

38 the 1st pressure cylinder chambers

39 the 2nd pressure cylinder chambers

40 the 4th pressure cylinder chambers

41 the 3rd pressure cylinder chambers

54,57,58,60 pipelines

The specific embodiment

The mold closing mechanism of the injection machine with reference to Fig. 1 to embodiments of the present invention describes.Injection machine 11 forms basic part by the mold closing mechanism 12 that is located at a side with the injection device 13 that is located at opposite side.If mold closing mechanism 12 is described, the opposite side on base 14 (injection device side) erects the fixed disk 16 that fixing metal mould 15 is installed.In addition, on base 14, open and close direction towards mould and be fixed wtih straight moving guidance part 17, on above-mentioned straight moving guidance part 17, can open and close direction along mould and be provided with movably mobile matched moulds dish 18.And, on mobile matched moulds dish 18, be fixed wtih integratedly the pallet 19 as foot towards fixed disk side, on pallet 19, can open and close direction along mould with respect to mobile matched moulds dish 18 and be provided with movably the movable plate 21 that movable metal pattern 20 is installed.In addition, in the present embodiment, on mobile matched moulds dish 18, be provided with clamping pressure cylinder 22.In addition, the pressure head 23 of clamping pressure cylinder 22 is fixed on the back side of movable plate 21.Between mobile matched moulds dish 18 and movable plate 21, be provided with and detect the position sensor 30 of movable plate 21 with respect to the position of mobile matched moulds dish 18.In addition, the quantity of clamping pressure cylinder 22 is not defined as 1.

A side (rear side) at base 14 has erected tie-rod holding plate 24.And near four jiaos of fixed disk 16, along continuous straight runs is fixed wtih tie-rod 25, tie-rod 25 is inserted respectively in movable plate 21, mobile matched moulds dish 18, tie-rod holding plate 24.In addition, than the centre of tie-rod 25 by the part of a side, be provided with the fastener 25a that spreads all over specific length and be formed with multiple grooves.And, around the hole of inserting tie-rod 25 of the face 18a (back side) of a side of mobile matched moulds dish 18, be equipped with halfnut 29.Halfnut 29 can be under the effect of halfnut actuating mechanism 31 to moving with the orthogonal direction of tie-rod 25.In addition, the pass of the groove of the fastener 25a of the tooth of halfnut 29 and tie-rod 25 is that, in the time that the tooth of halfnut 29 is engaged in above-mentioned groove, between opens and closes direction along mould and is provided with slightly gap.In addition, on the bracket that is located at the side on base 14, be fixed wtih the servo motor 26 of mould switching mechanism, and axle supports the ball screw 27 of mould switching mechanism, in the ball screw nut 28 being fixed on mobile matched moulds dish 18, inserting above-mentioned ball screw 27.Thus, mobile matched moulds dish 18 can be detected by the rotary encoder being arranged on servo motor 26 with respect to the position of base 14 and fixed disk 16.In addition, mould switching mechanism also can use other actuators or mechanism.In addition, mould switching mechanism also can be arranged between fixed disk 16 and mobile matched moulds dish 18, also can servo motor be installed in a certain side.

Then, the clamping pressure cylinder 22 of the mobile matched moulds dish 18 (in dish) that is configured in mold closing mechanism 12 is described.As shown in Figure 2, on the axle center of a side of the closing piston 32 in the large footpath of clamping pressure cylinder 22, be fixed wtih the 1st piston 33 of path, on the axle center of opposite side, be fixed wtih than above-mentioned closing piston 32 paths, than the 2nd large piston 34 of the 1st piston 33 diameters.And, be fixed wtih in the front of above-mentioned the 2nd piston 34 than the more pressure head 23 of path of the 2nd piston 34.On the other hand in the inside of mobile matched moulds dish 18; be formed with the clamping pressure bore section 35 of inserting sliding freely above-mentioned closing piston 32 in central authorities, be formed with the 1st pressure cylinder portion 36 of the path of inserting sliding freely above-mentioned the 1st piston 33 near one side (back side of mobile matched moulds dish 18).In addition, near the opposite side (movable plate) of clamping pressure cylinder 22, be formed with the 2nd pressure cylinder portion 37 that inserts sliding freely the 2nd piston 34, and then be formed with the hole of inserting sliding freely pressure head 23 at opposite side.

Above-mentioned clamping pressure cylinder 22 is formed with in a side the 1st pressure cylinder chamber 38 that is surrounded, used as the matched moulds of clamping pressure cylinder chamber by the back side, the inner peripheral surface of clamping pressure bore section 35 and the outer peripheral face of the 1st piston 33 of closing piston 32 as border using closing piston 32.In addition, in a side again of the 1st pressure cylinder chamber 38, be provided with by inner peripheral surface and the end face of the end face of the 1st piston 33, the 1st pressure cylinder portion 36 surround, as the 2nd pressure cylinder chamber 39 of fast feed pressure cylinder chamber.And; in the present embodiment; the compression area of the 2nd pressure cylinder chamber 39 is 1:9 with the ratio of the compression area of the 1st pressure cylinder chamber 38 as clamping pressure cylinder chamber, and the compression area that is supplied to the 2nd pressure cylinder chamber 39 of working oil in the time that closing piston 32 is moved is designed littlely.In addition; take the closing piston 32 of above-mentioned clamping pressure cylinder 22 as border, opposite side be formed with by before closing piston 32, the inner peripheral surface of the 2nd pressure cylinder portion 37 and the outer peripheral face of the 2nd piston 34 surround and to the conduct of working oil of arranging the 1st pressure cylinder chamber 38 to the 4th pressure cylinder chamber 40 of row pressure cylinder chamber.In addition, at the opposite side again of the 4th pressure cylinder chamber 40, be provided with by before the 2nd piston 34, the inner peripheral surface of the 2nd pressure cylinder portion 37 and the outer peripheral face of pressure head 23 surrounds, as the 3rd pressure cylinder chamber 41 of clamping pressure cylinder chamber.And the 2nd pressure cylinder chamber 39 and the 3rd pressure cylinder chamber 41 arrange as border take the closing piston 32 of clamping pressure cylinder 22, if be supplied to respectively working oil, produce thrust towards closing piston 32 sides.

In the present embodiment; the compression area of the compression area of the 1st pressure cylinder chamber 38, the compression area of the 4th pressure cylinder chamber 40 and the 3rd pressure cylinder chamber 41 is 9:5:2, and the 3rd pressure cylinder chamber 41 that is supplied to working oil in the time that closing piston 32 is moved is designed littlely than above-mentioned the 1st pressure cylinder chamber 38 compression areas.And, according to the above, clamping pressure cylinder 22 from a side, with the arranged in order of the 2nd the 38, the 4th pressure cylinder chamber 40, the 39, the 1st pressure cylinder chamber, pressure cylinder chamber and the 3rd pressure cylinder chamber 41 on coaxial.In addition, also the 1st pressure cylinder chamber 38 can be configured in to center axis one side of closing piston 32 (in the axial direction away from) and using be configured in as the 2nd pressure cylinder chamber 39 of fast feed pressure cylinder chamber than axle center in the outer part (being closing piston 32 sides in the axial direction) or using be configured in as the 3rd pressure cylinder chamber 41 of die sinking chamber than axle center in the outer part (being closing piston 32 sides in the axial direction), using as being configured in center axis one side of closing piston 32 (in the axial direction away from) to row with the 4th pressure cylinder chamber 40 of pressure cylinder chamber.

Then, the hydraulic circuit 51 of clamping pressure cylinder 22 is described.As shown in Figure 2, the pipeline 54 that disposes four direction switch valve 53, one sides in the main line from changeable pump 52 is connected on the 1st pressure cylinder chamber 38 and the 2nd pressure cylinder chamber 39 of clamping pressure cylinder.And, in branch after the pipeline 54a of the 2nd pressure cylinder chamber 39 can the pressure controlled sequence valve 55 with non-return to being provided with in the pipeline 54b of the 1st pressure cylinder chamber 38.In addition, between the 1st pressure cylinder chamber 38 and the 4th pressure cylinder chamber 40, the pipeline 57 of the tubular inserted valve 56 by open type is installed is connected.In addition, the pipeline 58 from above-mentioned four direction switch valves 53 to the opposing party branch is connected to the 3rd pressure cylinder chamber 41 as die sinking pressure cylinder chamber via guide's check-valves 59 of often opening voltage-regulation type (opening) more than opening pressure.In addition, above-mentioned pipeline 57 and the 3rd pressure cylinder chamber 41 that the 1st pressure cylinder chamber 38 is connected with the 4th pressure cylinder chamber 40 connect by pipeline 60, are provided with the guide check-valves 61 same with guide's check-valves 59 in pipeline 60.And, pipeline 57,60 be formed between the 1st pressure cylinder chamber 38 and the 41, the 4th pressure cylinder chamber 40, the 3rd pressure cylinder chamber to row's working oil around (run around) loop.In addition, about the 3rd pressure cylinder chamber 41, also can not be connected and not form around loop with the 1st pressure cylinder chamber.

In hydraulic circuit 51, in order to make guide's check-valves 59,61, tubular inserted valve 56, sequence valve 55 with non-return move and transfer valve 62,63,64 is installed.Another of the supply side of four direction switch valves 53 mouthful is connected on case 65.In addition, in Fig. 2, from the safety valve of the main line branch from changeable pump 52 or be located at check-valves main line etc. or a part of valve such as pressure-control valve or pressure sensor omit and record.In addition, about the hydraulic circuit of clamping pressure cylinder 22, being not limited to the example of Fig. 2, can be also the structure valve of pipeline being opened and closed by magnetic valve.In addition, also can be arranged on and extrude (Ya order) loop that the working oil of the 1st pressure cylinder chamber 38 grades fallen to draining tunnel from other pipelines or valve in operation etc.

Then, by Fig. 3 to Fig. 8, the method for operating of the mold closing mechanism 12 to present embodiment, the particularly method of operating of clamping pressure cylinder 22 describe.First, as Fig. 3 and carry out as shown in Figure 8 high speed mold closing operation.In high speed mold closing operation, the servo motor 26 that makes mould switching mechanism move and make the mobile matched moulds dish 18 in die sinking completing place and be positioned in movable plate 21 on its pallet 19 and movable metal pattern 20 to mold closing side shifting.And, making, on the position of movable metal pattern 20 before being about to be connected on fixing metal mould 15, the driving of servo motor 26 to be stopped, mobile matched moulds dish 18 is stopped.From now on; four direction switch valves 53 of clamping pressure cylinder 22 are switched to move to the left side in Fig. 2; via pipeline 58, guide's check-valves 59, the 3rd pressure cylinder chamber 41 transportation work oil as die sinking pressure cylinder are enclosed, pressure head 23 and closing piston 32 are in being urged the state that retreats the limit that remains on.Now, transfer valve 62 is switched, and transfer valve 64 is common positions, and guide's check-valves 61 is closed by guide's press seal.The hydraulic pressure of the working oil of carrying to the 3rd pressure cylinder chamber 41 when high speed mold closing operation is set as 5MPa as an example.

Then, carry out as shown in Figure 4 clamping pressure cylinder mold closing operation.In clamping pressure cylinder mold closing operation, mobile matched moulds dish 18 is stopped by under the state of servo motor 26 servo lockings, switch four direction switch valves 53 so that it moves to the right side in Fig. 2, via pipeline 54,54a, the 2nd pressure cylinder chamber 39 of clamping pressure cylinder 22 is supplied with working oil and movable plate 21 is advanced.Now, the 2nd pressure cylinder chamber 39 is small size compared with the 1st pressure cylinder chamber 38, can with higher speed, movable plate 21 be moved with the working oil of low capacity.In addition, the setting of the sequence valve 55 with non-return is installed with and is decided to be higher pressure (being 5MPa as an example), does not supply with working oil from changeable pump 52 to the 1st pressure cylinder chamber 38.In addition; produce thrust by the working oil being supplied in the 2nd pressure cylinder chamber 39; along with closing piston 32 moves to the right in Fig. 4; make the volume reducing of the 3rd pressure cylinder chamber 41 and the 4th pressure cylinder chamber 40, but working oil in the 3rd pressure cylinder chamber 41 and the 4th pressure cylinder chamber 40 is supplied with to the 1st pressure cylinder chamber 38 via the pipeline 60,57 as around loop.In addition; in the situation that the 3rd pressure cylinder chamber 41 is not connected with the 1st pressure cylinder chamber 38; by the movement to mold closing direction of closing piston 32, the working oil of the 3rd pressure cylinder chamber 41 is dropped in draining tunnel, but the working oil of at least the 4 pressure cylinder chamber 40 is supplied with to the 1st pressure cylinder chamber 38.

Thereby now transfer valve 64 is switched, guide's check-valves 59 is closed by guide's press seal, and the working oil of the 3rd pressure cylinder chamber 41 and the 4th pressure cylinder chamber 40 can not be returned to draining tunnel side.And, in clamping pressure cylinder mold closing operation, move in the halfnut actuating mechanism 31 that makes that movable plate 21 is moved midway, halfnut 29 is moved and engagement towards the fastener 25a of tie-rod 25.And then the mold closing that continues movable plate 21 moves, and movable metal pattern 20 is connected on fixing metal mould 15.And then, by continuing to the supply of the working oil of the 2nd pressure cylinder chamber 39, by the gap elimination between the groove of the fastener 25a of the tooth of halfnut 29 and tie-rod 25.Now, also can only supply with the working oil of the pressure lower than the setting pressure of the sequence valve 55 with non-return and mobile matched moulds dish 18 and halfnut 29 are retreated to the 2nd pressure cylinder chamber 39, can shorten traveling time.In addition, with the butt of metal pattern simultaneously or forward slightly, the servo lockup state of the servo motor of mould switching mechanism 26 is removed, in the time of the retreating of mobile matched moulds dish 18, follow control.In addition, the engagement of the groove of the tooth of halfnut 29 and tie-rod 25 if from and mobile matched moulds dish 18 stop simultaneously just passable to completing mould butt, carry out concurrently thus the action of halfnut 29, so the stand-by period that the locking of halfnut 29 brings does not occur and can not become the loss of time.

Then, carry out as shown in Figure 5 matched moulds operation.In matched moulds operation, by by the side butt of the groove of the fastener 25a of the side of the tooth of halfnut 29 and tie-rod 25, retreating of mobile matched moulds dish 18 stopped, the working oil of the 2nd pressure cylinder chamber 39 and pipeline 54,54a is boosted, if exceed the setting pressure of the sequence valve 55 with non-return, also supply with working oil via pipeline 54b to the 1st pressure cylinder chamber 38 sides.The hydraulic pressure of the working oil of carrying to the 1st pressure cylinder chamber 38 during using matched moulds operation is set as 21MPa as an example.In the time of matched moulds operation, switch transfer valve 63, by pilot pressure, tubular inserted valve 56 is sealed.And, the working oil of the 3rd pressure cylinder chamber 41 of volume reducing and the 4th pressure cylinder chamber 40 is fallen to draining tunnel via guide's check-valves 59,61, four direction switch valves 53, but its flow is a small amount of, and the pressure of the 3rd pressure cylinder chamber 41 and the 4th pressure cylinder chamber 40 can not become below the opening pressure of guide's check-valves 59,61.And, in during matched moulds operation, action by clamping pressure cylinder 22 stretches tie-rod 25, from injection device 13 by molten resin injection fillers in the cavity (not shown) being formed on fixing metal mould 15 matched moulds and movable metal pattern 20, in cavity, carry out the cooling curing of molten resin.In addition,, in injection device 13, carry out the measurement process of the shaping for following.

Then, extrude as shown in Figure 6 operation.Extruding in operation, switch four direction switch valves 53, make to drop in draining tunnel as the 1st pressure cylinder chamber 38 of clamping pressure cylinder chamber and the working oil of the 2nd pressure cylinder chamber 39.By extruding operation, closing piston 32 and pressure head 23 are moved to the left side in Fig. 2 slightly.Then, make the tie-rod 25 after the stretching of mold closing mechanism 12 get back to original state, fixing metal mould 15 completes with the matched moulds of movable metal pattern 20.In addition, in extruding during operation, changeable pump 52 is unloaded.In addition, extruding in operation, also can make the working oil of the 1st pressure cylinder chamber 38 and the 2nd pressure cylinder chamber 39 or the working oil of the 3rd pressure cylinder chamber 41 and the 4th pressure cylinder chamber 40 drop in draining tunnel by other paths.

Then, carry out as shown in Figure 7 powerful die sinking operation.In powerful die sinking operation, servo motor 26 forward direction of mould switching mechanism are moved, the butt of the side of the groove of the side of the tooth of the halfnut 29 of one side of butt in matched moulds operation and fastener 25a is removed, the gap between the side of the Yu Cao opposition side, side of the opposition side of the tooth of halfnut 29 (gap forming when the matched moulds operation) eliminated and butt.And, in the elimination in above-mentioned gap or front and back, use clamping pressure cylinder 22 that movable plate 21 is moved to die sinking direction.By using clamping pressure cylinder 22, can carry out powerful die sinking with larger power, can also make the small-sized movement that turns to mobile matched moulds dish 18 grades of the servo motor 26 of mould switching mechanism special.In powerful die sinking operation, switch four direction switch valves 53 of hydraulic circuit 51, via pipeline 58, working oil is supplied with in the 3rd pressure cylinder chamber 41 as die sinking chamber.And; if the 3rd pressure cylinder chamber 41 is supplied with working oil and is produced thrust towards closing piston 32 sides; closing piston 32, pressure head 23 and movable plate 21 etc., by mobile to die sinking direction (being left side in Fig. 1, Fig. 2, Fig. 7), make the volume reducing of the 1st pressure cylinder chamber 38 and the 2nd pressure cylinder chamber 39.Now, transfer valve 62 is switched, and guide's check-valves 61 is closed, and tubular inserted valve 56 is opened, thus the working oil of the 1st pressure cylinder chamber 38 many by via pipeline 57 to as give row chamber the 4th pressure cylinder chamber 40 carry.(working oil of the 1st pressure cylinder chamber 38 is at least carried to the 4th pressure cylinder chamber 40.) in addition, make the 1st pressure cylinder chamber 38 working oil a part and fall to draining tunnel via four direction switch valves 53 as the working oil of the 2nd pressure cylinder chamber 39 of fast feed pressure cylinder.The hydraulic pressure of the working oil of carrying to the 3rd pressure cylinder chamber 41 during using powerful die sinking operation is set as 7MPa as an example.

And, if the 2nd piston 34 is applied to the thrust that the working oil of the 3rd pressure cylinder chamber 41 brings, pressure head 23 is moved towards direction of retreat, make movable metal pattern 20 start from fixing metal mould 15 mobile, make the cavity demoulding of formed products from a metal pattern.In addition, due in the larger power of the initial needs of the demoulding, so the compression area of the 3rd pressure cylinder chamber 41 is too small also bad.But, owing to also needing to make mobile matched moulds dish 18 with high-speed mobile relatively between powerful die sinking operation and the clamping pressure cylinder die sinking operation followed, thus preferably make the compression area of the 3rd pressure cylinder chamber 41 not quite many compared with the 1st pressure cylinder chamber 38, be made as (10~50%), make the working oil carried to the 3rd pressure cylinder chamber 41 less just out of question.If make movable plate 21 retreat into assigned position by powerful die sinking operation, then transfer to clamping pressure cylinder die sinking operation.

As shown in Figure 7, in clamping pressure cylinder die sinking operation, the servo motor 26 of the mould switching mechanism direction of drawing back is moved slightly, the butt of the side of the groove of the fastener 25a of the side of the tooth of halfnut 29 and tie-rod 25 is removed.And, will under the state of servo motor 26 lockings, make halfnut actuating mechanism 31 move, the action of halfnut 29 is removed.And then; continue the 3rd pressure cylinder chamber 41 to supply with working oil, as shown in Figure 3, the thrust that the hydraulic pressure of the working oil by the 3rd pressure cylinder chamber 41 brings makes movable plate 21 continue to retreat; closing piston 32 is moved to and retreats the limit, in clamping pressure cylinder 22, be urged fixing.In powerful die sinking operation and clamping pressure cylinder die sinking operation, the position (flow direction of working oil) of the valve of hydraulic circuit 51 is identical, but by not shown pressure-control valve, make setting pressure as an example and decline 2MPa becomes 5MPa, more at a high speed pressure head 23 and movable plate 21 are retreated to movement.

Then shift to high speed die sinking operation.In high speed die sinking operation, clamping pressure cylinder 22 is retained as the state of Fig. 3, makes to move as the servo motor 26 of mould switching mechanism, makes mobile matched moulds dish 18 and movable plate 21 move to die sinking completing place.Then, in die sinking completing place, formed products is taken out, again transfer to high speed mold closing operation and carry out high speed mold closing.The hydraulic pressure of the working oil of carrying to the 3rd pressure cylinder chamber 41 during by high speed die sinking operation continues to be set as 5MPa.

Then, the clamping pressure cylinder 72 of the mold closing mechanism 71 to another embodiment shown in Fig. 9 describes.The clamping pressure cylinder 72 of another embodiment of Fig. 9 is located in the dish of the mold closing mechanism 71 forming as patent documentation 3 to two dishes by the fixed disk 74 of fixing metal mould 73 and the movable plate of the movable metal pattern of installation are installed such shown in patent documentation 5 of look-ahead technique.Clamping pressure cylinder 72 is same with above-mentioned embodiment; take closing piston 75 as border, be provided with the clamping pressure cylinder chamber 76 (the 1st pressure cylinder chamber) in large footpath and the fast feed pressure cylinder chamber 77 (the 2nd pressure cylinder chamber) for the position adjustments of the tie-rod of path in a side (fixing metal mould side).And the central side of fast feed pressure cylinder chamber 77 is tie-rod 78.In addition,, take closing piston 75 as border, be formed with the die sinking chamber (the 3rd pressure cylinder chamber) to row pressure cylinder chamber 79 (the 4th pressure cylinder chamber) and path in large footpath at opposite side (injection device side).And give prominence to from dish to opposite side the end that forms the bar 81 of the die sinking chamber 80 of path, and position sensor 82 is installed.The action of the clamping pressure cylinder 72 in hydraulic circuit and the forming period of the mold closing mechanism 71 of another embodiment is roughly same with above-mentioned embodiment, so description thereof is omitted.In addition the dish that, clamping pressure cylinder 72 is set in another embodiment can be also movable plate.In addition,, as another embodiment again, although omitted diagram, be subject to like that as Patent Document 1, in the mold closing mechanism of clamping pressure cylinder being installed on platen, being fixed with mechanical pressure head on movable plate, clamping pressure cylinder of the present invention to be also installed.

In addition, in the method for operating of the clamping pressure cylinder 22 of above-mentioned embodiment, for before fixing metal mould 15 and movable metal pattern 20 are by butt, the servo motor 26 of mould switching mechanism being stopped, the 2nd pressure cylinder chamber 39 as fast feed pressure cylinder chamber of clamping pressure cylinder 22 being supplied with working oil, fixing metal mould 15 and the example of movable metal pattern 20 butts are recorded.But; also can be after making movable plate by mould switching mechanism and movably metal pattern advance to the compression starting position of metal pattern butt position or ejection compress moulding; by halfnut engagement; the gap value of the fastener of halfnut and tie-rod etc. is eliminated, correspondingly the 2nd pressure cylinder chamber is supplied with working oil and made the movements such as closing piston.

Industrial applicibility

Mold closing mechanism of the present invention except injection machine, can also die casting forming machine and pressure apparatus etc., will fixing metal mould (comprising increased pressure board) with movable metal pattern (comprising increased pressure board) mold closing after use in all devices of matched moulds (supercharging).In addition, in the situation that being used in injection machine, can be also the structure of carrying out ejection compress moulding, injection pressure forming, foaming and molding etc., moulding material does not also limit.In addition can be also between fixing metal mould and movable metal pattern, to arrange the structure of the other movable metal pattern in centre or use more than 1 fixing metal mould (being included in the structure of rotating on rotary table) and the structure of more than 1 movable metal pattern (being included in the structure of rotating on rotary table).In addition, mold closing mechanism can be also longitudinal type.

Claims (3)

1. a mold closing mechanism, be by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, carry out the mold closing mechanism of matched moulds by clamping pressure cylinder, it is characterized in that,
Can open and close direction with respect to mobile matched moulds rim mould and be provided with movably movable plate, be provided with clamping pressure cylinder at above-mentioned mobile matched moulds dish, the pressure head of this clamping pressure cylinder is fixed in the back side of movable plate;
In a side of the closing piston of above-mentioned clamping pressure cylinder, the rear side of mobile matched moulds dish is provided with the 1st pressure cylinder chamber that matched moulds uses and is supplied to working oil and makes above-mentioned pressure head move and movable metal pattern be advanced and the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber that compression area is less than the 1st pressure cylinder chamber to mold closing direction;
In the opposite side of above-mentioned closing piston, i.e. movable plate side, be provided with compression area than the 3rd little pressure cylinder chamber of above-mentioned the 1st pressure cylinder chamber and be connected to the 4th pressure cylinder chamber on above-mentioned the 1st pressure cylinder chamber via pipeline and valve;
In the time that clamping pressure cylinder mold closing operation makes pressure head move to mold closing direction; working oil is supplied with in the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber; and the working oil to major general the 4th pressure cylinder chamber is carried to the 1st pressure cylinder chamber, and closing piston is moved to mold closing direction.
2. mold closing mechanism as claimed in claim 1, it is characterized in that, above-mentioned clamping pressure cylinder is disposed in the inside of the mobile matched moulds dish of mold closing mechanism, from a side, the rear side of mobile matched moulds dish is using the arranged in order of the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber, the 1st pressure cylinder chamber, the 4th pressure cylinder chamber and the 3rd pressure cylinder chamber coaxial, the compression area of the 4th pressure cylinder chamber is little and to compare the compression area of the 3rd pressure cylinder chamber large than the compression area of the 1st pressure cylinder chamber.
3. the method for operating of a mold closing mechanism, be by mould switching mechanism make movable metal pattern with respect to fixing metal mould approaching or butt, after by halfnut and fastener engagement, carry out the method for operating of the mold closing mechanism of matched moulds by clamping pressure cylinder, it is characterized in that
Can open and close direction with respect to mobile matched moulds rim mould and be provided with movably movable plate, be provided with clamping pressure cylinder at above-mentioned mobile matched moulds dish, the pressure head of this clamping pressure cylinder is fixed in the back side of movable plate;
In a side of the closing piston of above-mentioned clamping pressure cylinder, the rear side of mobile matched moulds dish is provided with the 1st pressure cylinder chamber that matched moulds uses and is supplied to working oil and makes above-mentioned pressure head move and movable metal pattern be advanced and the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber that compression area is less than the 1st pressure cylinder chamber to mold closing direction;
In the opposite side of above-mentioned closing piston, i.e. movable plate side, be provided with compression area than the 3rd little pressure cylinder chamber of above-mentioned the 1st pressure cylinder chamber and be connected to the 4th pressure cylinder chamber on above-mentioned the 1st pressure cylinder chamber via pipeline and valve;
In the time that clamping pressure cylinder mold closing operation makes pressure head move to mold closing direction, working oil is supplied with in the 2nd pressure cylinder chamber as fast feed pressure cylinder chamber, and the working oil to major general the 4th pressure cylinder chamber is carried to the 1st pressure cylinder chamber, and closing piston is moved to mold closing direction;
In the time of die sinking, working oil is supplied with in the 3rd pressure cylinder chamber, and the working oil of the 1st pressure cylinder chamber is at least carried to the 4th pressure cylinder chamber, closing piston is moved to die sinking direction.
CN201010231720.0A 2009-08-17 2010-07-15 A mold clamping device and an operating method of the mold clamping device CN101992531B (en)

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JP5757585B2 (en) * 2013-01-16 2015-07-29 株式会社名機製作所 Injection molding machine
JP6177217B2 (en) * 2014-11-05 2017-08-09 日精樹脂工業株式会社 Clamping device
JP6298024B2 (en) * 2015-08-27 2018-03-20 日精樹脂工業株式会社 Clamping device

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CN2780449Y (en) * 2005-04-01 2006-05-17 江苏维达机械有限公司 Mould closing device of hollow moulding machine

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JPH0899165A (en) * 1994-09-30 1996-04-16 Ube Ind Ltd Die-clamp device in forming apparatus
JP3364202B2 (en) * 2000-10-02 2003-01-08 株式会社名機製作所 Mold clamping device of injection molding machine
JP4531436B2 (en) 2004-04-13 2010-08-25 東芝機械株式会社 Clamping device
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CN2780449Y (en) * 2005-04-01 2006-05-17 江苏维达机械有限公司 Mould closing device of hollow moulding machine

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JP5084797B2 (en) 2012-11-28

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Effective date of registration: 20200622

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Patentee after: THE JAPAN STEEL WORKS, Ltd.

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Patentee before: Kabushiki Kaisha Meiki Seisakusho