CN101992531A - 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
CN101992531A
CN101992531A CN2010102317200A CN201010231720A CN101992531A CN 101992531 A CN101992531 A CN 101992531A CN 2010102317200 A CN2010102317200 A CN 2010102317200A CN 201010231720 A CN201010231720 A CN 201010231720A CN 101992531 A CN101992531 A CN 101992531A
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CN
China
Prior art keywords
pressure cylinder
cylinder chamber
mold closing
matched moulds
closing
Prior art date
Application number
CN2010102317200A
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Chinese (zh)
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CN101992531B (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 JP2009-188168 priority Critical
Priority to JP2009188168A priority patent/JP5084797B2/en
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 the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, carry out the mold closing mechanism of matched moulds and the method for operating of mold closing mechanism by the clamping pressure cylinder.

Background technology

As the mold closing mechanism that in injection machine, uses, exist as toggle mechanism by same mechanism carry out that mould opens and closes and the device of matched moulds and by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or be connected to halfnut and fastener card only afterwards, carry out the mold closing mechanism of matched moulds by the clamping pressure cylinder.As the type of the latter's use halfnut and clamping pressure cylinder, the known structure that patent documentation 1 record to the patent documentation 5 is arranged.The structure of the type shown in Figure 1 of patent documentation 1 is being subjected to platen (carriage 30) that the clamping pressure cylinder go up to be installed, and 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 mechanical pressure head (mould opens and closes pressure cylinder 12) on the other hand, on the barrel surface of mechanical pressure head, be formed with the groove that halfnut can engage.In addition, be provided with the mould switching mechanism that under mould opens and closes with the servo motor effect, moves in the inside of above-mentioned mechanical pressure head.The mold closing mechanism of the type is seen in medium-sized mold closing mechanism small-sized more.In addition, the structure of the type shown in Figure 1 of patent documentation 2 is provided with the 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 slotting tie-rod (pull bar) that leads in movable plate, be formed with the threaded portion that halfnut can engage.

And then the structure of the type shown in the patent documentation 3 is provided with the clamping pressure cylinder on four jiaos of fixed disk, is installed with the tie-rod that is formed with cannelure on the pressure head of clamping pressure cylinder.And the halfnut card that is located on the movable plate ends in the cannelure of tie-rod.In addition, in patent documentation 3, additionally be provided with the secondary stress cylinder, before the matched moulds operation when the work running, make pressure head get back to revised position by above-mentioned secondary stress cylinder with the clamping pressure cylinder.But, patent documentation 3 because be when pressure head being moved by the secondary stress cylinder, make the oil in the clamping pressure cylinder be discharged to the structure of the type in the draining tunnel, so be the also structure of spended time that moves 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 be installed independently in the outside in addition.

As the structure of reply the problems referred to above, the known structure that type shown in the patent documentation 4 is arranged.In patent documentation 4, the part that is equivalent to the secondary stress cylinder of patent documentation 3 is accommodated in the dish as the 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 in that the matched moulds side is communicated with the big grease chamber of die sinking side.But, patent documentation 4 makes during for die sinking the matched moulds side and the big grease chamber of die sinking side be identical pressure, carry out moving to the die sinking direction by the difference of hydraulic operation area, but need make this moment the pressure of both big grease chambeies rise the problem that the action when die sinking is arranged is slack-off.And then, about patent documentation 5, also be the structure that is provided with the path pressure cylinder in the clamping pressure cylinder in being located at dish.And, in patent documentation 5, when die sinking, when the oil of will working makes pressure cylinder chamber the 1st of the matched moulds side of big footpath pressure cylinder be communicated with pressure cylinder chamber the 2nd of die sinking side when being transported in the path pressure cylinder chamber, realize minimizing to the flow of the working solution of clamping pressure cylinder supply by making pressure oil circulation.But,, have when tie-rod is returned to original state in order to supply with work oil and to need the jumbo work oil and the slack-off problem of moving to pressure cylinder chamber the 1st of big footpath pressure cylinder about patent documentation 5.

[patent documentation 1] spy open the 2001-212828 communique (0029, Fig. 1)

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

[patent documentation 3] spy open flat 8-276482 communique (0021, Fig. 1)

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

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

Though the technology of above-mentioned patent documentation 4 and patent documentation 5 has the structure as connections such as pressure cylinder chambers the 2nd of pressure cylinder chamber the 1st of the clamping pressure cylinder chamber of the matched moulds side of clamping pressure cylinder and die sinking side, but owing to do not have the pressure cylinder chamber of path both of matched moulds side, die sinking side, so make the clamping pressure cylinder to two-way when mobile, can not be mobile with the work oil of less flow respectively, the supply spended time of the work oil of grease chamber is so can not shorten altogether forming period time.Perhaps,, then need the size of the pump of hydraulic circuit or valve etc. is prepared to supply with the structure of a large amount of work oil in the short time, can not make the above-mentioned hydraulic circuit compactness that becomes if want to shorten altogether forming period time.

Summary of the invention

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

Technical scheme 1 described mold closing mechanism of the present invention; be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, by the clamping pressure cylinder, carry out the mold closing mechanism of matched moulds; it is characterized in that; closing piston with above-mentioned clamping pressure cylinder is the border, if possess little pressure cylinder chamber the 2nd and the pressure cylinder chamber the 3rd that is supplied to work oil then produces thrust towards the closing piston side, pressure cylinder chamber the 1st that compression area is used than matched moulds.Thereby, the size of the pump of hydraulic circuit or valve etc. is maximized and the clamping pressure cylinder is moved more quickly to two directions, can shorten forming period.

The method of operating of technical scheme 4 described mold closing mechanisms of the present invention; be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt; after halfnut and fastener card are ended; carry out the method for operating of the mold closing mechanism of matched moulds by the clamping pressure cylinder; it is characterized in that; closing piston with above-mentioned clamping pressure cylinder is the border; possess little pressure cylinder chamber the 2nd and the pressure cylinder chamber the 3rd, pressure cylinder chamber the 1st that compression area is used than matched moulds; if pressure cylinder chamber the 2nd and pressure cylinder chamber the 3rd are supplied to work oil respectively, then produce thrust towards the closing piston side.Thereby, the size of the pump of hydraulic circuit or valve etc. is maximized and the 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 the border with the closing piston of above-mentioned clamping pressure cylinder; if possess little pressure cylinder chamber the 2nd and the pressure cylinder chamber the 3rd that is supplied to work oil then produces thrust towards the closing piston side, pressure cylinder chamber the 1st that compression area is used than matched moulds; so the size of the pump of hydraulic circuit or valve etc. is maximized and the clamping pressure cylinder is moved more quickly to two directions, can shorten forming period.

Description of drawings

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 of expression present embodiment and the figure of its hydraulic circuit.

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

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

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

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

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

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

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

Description of reference numerals

11 injection machines

12 mold closing mechanisms

15 fixing metal moulds

18 move the matched moulds dish

20 movable metal patterns

21 movable plates

22 clamping pressure cylinders

23 pressure heads

25 tie-rods

The 25a fastener

29 halfnuts

32 closing pistons

Pressure cylinder chambers 38 the 1st

Pressure cylinder chambers 39 the 2nd

Pressure cylinder chambers 40 the 4th

Pressure cylinder chambers 41 the 3rd

54,57,58,60 pipelines

The specific embodiment

With reference to Fig. 1 the mold closing mechanism of the injection machine of embodiments of the present invention is described.Injection machine 11 constitutes basic part by mold closing mechanism 12 that is located at a side and the injection device 13 that is located at opposite side.If mold closing mechanism 12 is described, then the opposite side on base 14 (injection device side) stands and is provided with the fixed disk 16 that installs and fixes metal pattern 15.In addition, on base 14, open and close direction towards mould and fixing straight moving guidance part 17, on above-mentioned straight moving guidance part 17, can open and close direction along mould and be provided with mobile matched moulds dish 18 movably.And, on mobile matched moulds dish 18, fixing pallet 19 integratedly as foot towards the 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 the movable plate 21 that movable metal pattern 20 is installed movably.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 equipped 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.

At the upright tie-rod holding plate 24 that is provided with of a side (rear side) of base 14.And near four jiaos of fixed disk 16, along continuous straight runs is being fixed tie-rod 25, and tie-rod 25 is inserted respectively and led in movable plate 21, mobile matched moulds dish 18, tie-rod holding plate 24.In addition, lean on the part of a side, be provided with and spread all over the fastener 25a that specific length is formed with a plurality of grooves in centre than tie-rod 25.And, around the hole of inserting logical 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 move to the direction with tie-rod 25 quadratures under the effect of halfnut actuating mechanism 31.In addition, the pass of the groove of the fastener 25a of the tooth of halfnut 29 and tie-rod 25 is that when the tooth of halfnut 29 was engaged in the above-mentioned groove, between opened and closed direction along mould and is provided with the gap slightly.In addition, on the carriage that is located at the side on the base 14, fixing the servo motor 26 of mould switching mechanism, and axle supporting the ball screw 27 of mould switching mechanism, inserting in the ball screw nut 28 on being fixed in mobile matched moulds dish 18 and leading to above-mentioned ball screw 27.Thus, mobile matched moulds dish 18 can be detected by the rotary encoder that is installed on the servo motor 26 with respect to the position of base 14 and fixed disk 16.In addition, the mould switching mechanism also can use other actuators or mechanism.In addition, the mould switching mechanism also can be installed between fixed disk 16 and the mobile matched moulds dish 18, also can servo motor be installed in a certain side.

Then, the clamping pressure cylinder 22 to the mobile matched moulds dish 18 that is configured in mold closing mechanism 12 (in the dish) describes.As shown in Figure 2, on the axle center of a side of the closing piston 32 in the big footpath of clamping pressure cylinder 22, fixing the 1st piston 33 of path, on the axle center of opposite side, fixing than above-mentioned closing piston 32 paths, than the 2nd big piston 34 of the 1st piston 33 diameters.And, fixing in the place ahead of above-mentioned the 2nd piston 34 and to compare 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 logical above-mentioned closing piston 32 sliding freely in central authorities, be formed with the 1st pressure cylinder portion 36 that inserts the path of logical above-mentioned the 1st piston 33 sliding freely 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 logical the 2nd piston 34 sliding freely, and then be formed with the hole of inserting logical pressure head 23 sliding freely at opposite side.

To be the border with closing piston 32 be formed with the pressure cylinder chamber 38 the 1st that outer peripheral face by the inner peripheral surface of the back side of closing piston 32, clamping pressure bore section 35 and the 1st piston 33 surrounds, uses as the matched moulds of clamping pressure cylinder chamber in a side with above-mentioned clamping pressure cylinder 22.In addition, the side again in pressure cylinder chamber 38 the 1st, be provided with inner peripheral surface and end face by the end face of the 1st piston 33, the 1st pressure cylinder portion 36 surround, as pressure cylinder chamber 39 the 2nd of fast feed pressure cylinder chamber.And; in the present embodiment; the compression area of pressure cylinder chamber 39 the 2nd is 1: 9 with ratio as the compression area of pressure cylinder chamber 38 the 1st of clamping pressure cylinder chamber, and the compression area that will be supplied to pressure cylinder chamber 39 the 2nd of work oil when closing piston 32 is moved designs forr a short time.In addition; closing piston 32 with above-mentioned clamping pressure cylinder 22 is the border, is formed with by the front of closing piston 32, the inner peripheral surface of the 2nd pressure cylinder portion 37 and the outer peripheral face of the 2nd piston 34 at opposite side and surrounds and give the 4th pressure cylinder chamber 40 of the conduct of the work oil of arranging pressure cylinder chamber 38 the 1st to row's pressure cylinder chamber.In addition, the opposite side again in pressure cylinder chamber 40 the 4th, be provided with outer peripheral face by the inner peripheral surface of the front of the 2nd piston 34, the 2nd pressure cylinder portion 37 and pressure head 23 surround, as pressure cylinder chamber 41 the 3rd of clamping pressure cylinder chamber.And pressure cylinder chamber 39 the 2nd and pressure cylinder chamber 41 the 3rd are that the border sets with the closing piston 32 of clamping pressure cylinder 22, if be supplied to work oil respectively then produce thrust towards closing piston 32 sides.

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

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

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

Then, by Fig. 3 to Fig. 8 the method for operating of the mold closing mechanism 12 of present embodiment, the particularly method of operating of clamping pressure cylinder 22 are described.At first, as Fig. 3 and carry out high speed mold closing operation as shown in Figure 8.In high speed mold closing operation, make servo motor 26 action of mould switching mechanism and make the mobile matched moulds dish 18 that is in the die sinking completing place and be positioned in movable plate 21 on its pallet 19 and movable metal pattern 20 to the mold closing side shifting.And, making on the position of movable metal pattern 20 before being about to be connected on the fixing metal mould 15, the driving of servo motor 26 is stopped, mobile matched moulds dish 18 is stopped.Till this moment; the four directions of clamping pressure cylinder 22 is switched to move to the left side among Fig. 2 to transfer valve 53; enclose as pressure cylinder chamber the 3rd 41 transportation works oil of die sinking pressure cylinder via 59 pairs of pipelines 58, guide's check-valves, pressure head 23 and closing piston 32 are in the state that retreats the limit that remains on that is urged.At this moment, 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 work oil of carrying to pressure cylinder chamber 41 the 3rd during high speed mold closing operation is set at 5MPa as an example.

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

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

Then, carry out the matched moulds operation as shown in Figure 5.In the matched moulds operation, by side butt with 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 work oil of pressure cylinder chamber 39 the 2nd and pipeline 54,54a is boosted, if surpass the setting pressure of the sequence valve 55 of band non-return, then also supply with work oil to pressure cylinder chamber the 1st 38 sides via pipeline 54b.The hydraulic pressure of the work oil of carrying to pressure cylinder chamber 38 the 1st during with the matched moulds operation is set at 21MPa as an example.When the matched moulds operation, switch transfer valve 63, by pilot pressure tubular inserted valve 56 is sealed.And, the pressure cylinder chamber 41 the 3rd of volume reducing and the work oil of pressure cylinder chamber 40 the 4th are fallen to draining tunnel to transfer valve 53 via guide's check-valves 59,61, four directions, but its flow is a small amount of, and the pressure of pressure cylinder chamber 41 the 3rd and pressure cylinder chamber 40 the 4th can not become below the opening pressure of guide's check-valves 59,61.And, in during the matched moulds operation, action by clamping pressure cylinder 22 stretches tie-rod 25, from injection device 13 is filled into molten resin injection the fixing metal mould 15 that is formed on behind the matched moulds and the movable cavity (not shown) between the metal pattern 20, in cavity, carry out the cooling curing of molten resin.In addition, in injection device 13, be used for the measurement process of shaping then.

Then, extrude operation as shown in Figure 6.In extruding operation, switch the four directions to transfer valve 53, make as the pressure cylinder chamber 38 the 1st of clamping pressure cylinder chamber and the work oil of pressure cylinder chamber 39 the 2nd to drop in the draining tunnel.By extruding operation, closing piston 32 and pressure head 23 are moved in 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 is finished with the matched moulds of movable metal pattern 20.In addition, extrude operation during in, with changeable pump 52 unloadings.In addition, in extruding operation, the work oil of pressure cylinder chamber 38 the 1st and pressure cylinder chamber 39 the 2nd or the work oil of pressure cylinder chamber 41 the 3rd and pressure cylinder chamber 40 the 4th are dropped in the draining tunnel by other paths.

Then, carry out powerful die sinking operation as shown in Figure 7.In powerful die sinking operation, servo motor 26 forward direction of mould switching mechanism are moved, will be in the matched moulds operation butt of side of groove of the side of the tooth of the halfnut 29 of a side of butt and fastener 25a remove, with (gap that forms when the matched moulds operation) elimination of the gap between the side of the side of the opposition side of the tooth of halfnut 29 and the opposition side of groove 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 the die sinking direction.By using clamping pressure cylinder 22, can carry out powerful die sinking with bigger power, can also make the servo motor 26 small-sized mobile special uses that turn to mobile matched moulds dish 18 grades of mould switching mechanism.In powerful die sinking operation, the four directions of switching hydraulic circuit 51 is to transfer valve 53, via 58 pairs of pressure cylinder chamber the 3rd 41 supply work oil as the die sinking chamber of pipeline.And; if 41 supply work oil in pressure cylinder chamber the 3rd is produced thrust towards closing piston 32 sides; then quilts such as closing piston 32, pressure head 23 and movable plate 21 move to die sinking direction (being the left side in Fig. 1, Fig. 2, Fig. 7), make the volume reducing of pressure cylinder chamber 38 the 1st and pressure cylinder chamber 39 the 2nd.At this moment, transfer valve 62 is switched, and guide's check-valves 61 is closed, and tubular inserted valve 56 is by open, so many quilts of the work oil of pressure cylinder chamber 38 the 1st are carried to the pressure cylinder chamber 40 the 4th as the row of giving chamber via pipeline 57.(the work oil of pressure cylinder chamber 38 the 1st is carried to pressure cylinder chamber 40 the 4th at least.) in addition, make pressure cylinder chamber 38 the 1st work oil a part and fall to draining tunnel to transfer valve 53 via the four directions as the work oil of pressure cylinder chamber 39 the 2nd of fast feed pressure cylinder.The hydraulic pressure of the work oil of carrying to pressure cylinder chamber 41 the 3rd during with powerful die sinking operation is set at 7MPa as an example.

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

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

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 servo motor 26 actions as the mould switching mechanism, makes mobile matched moulds dish 18 and movable plate 21 move to the die sinking completing place.Then, formed products is taken out, transfer to high speed mold closing operation once more and carry out the high speed mold closing in the die sinking completing place.The hydraulic pressure of the work oil of carrying to pressure cylinder chamber 41 the 3rd during with high speed die sinking operation continues to be set at 5MPa.

Then, the clamping pressure cylinder 72 to the mold closing mechanism 71 of another embodiment shown in Figure 9 describes.The clamping pressure cylinder 72 of another embodiment of Fig. 9 is located at as the patent documentation 3 of look-ahead technique to the dish of such mold closing mechanism 71 that is made of the fixed disk 74 that installs and fixes metal pattern 73 and two dishes that the movable plate of movable metal pattern is installed shown in the patent documentation 5.Clamping pressure cylinder 72 is same with above-mentioned embodiment; with closing piston 75 is the border, is provided with the clamping pressure cylinder chamber 76 (pressure cylinder chamber the 1st) in big footpath and is used for the fast feed pressure cylinder chamber 77 (pressure cylinder chamber the 2nd) of 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 a tie-rod 78.In addition, be the border with closing piston 75, be formed with the row of giving 79 (the pressure cylinder chambers the 4th), pressure cylinder chamber in big footpath and the die sinking chamber (pressure cylinder chamber the 3rd) of path at opposite side (injection device side).And the end of the bar 81 of the die sinking chamber 80 of formation path is outstanding to opposite side from dish, and position sensor 82 is installed.The action of the hydraulic circuit of the mold closing mechanism 71 of another embodiment and the clamping pressure cylinder 72 in the forming period and above-mentioned embodiment roughly are same, so omit explanation.In addition, the dish that clamping pressure cylinder 72 is set in another embodiment also can be a movable plate.In addition, as another embodiment again,, be subjected to like that shown in patent documentation 1 the clamping pressure cylinder is installed on the platen, on movable plate, be fixed with in the mold closing mechanism of mechanical pressure head clamping pressure cylinder of the present invention also can be installed though omitted diagram.

In addition, in the method for operating of the clamping pressure cylinder 22 of above-mentioned embodiment, for be about to before the butt servo motor 26 of mould switching mechanism to be stopped at fixing metal mould 15 and movable metal pattern 20, to pressure cylinder chamber the 2nd 39 supply work oil as fast feed pressure cylinder chamber of clamping pressure cylinder 22, the fixing metal mould 15 and the example of movable metal pattern 20 butts are put down in writing.But; also can make by the mould switching mechanism after movable plate and movable metal pattern advance to the compression starting position of metal pattern butt position or ejection compress moulding; the halfnut card is ended; the gap value of the fastener of halfnut and tie-rod etc. is eliminated, correspondingly work oil is supplied with in pressure cylinder chamber the 2nd and closing piston etc. is moved.

Industrial applicibility

Mold closing mechanism of the present invention can also use in die casting forming machine and pressure apparatus etc., all devices with matched moulds (supercharging) behind fixing metal mould (comprising increased pressure board) and movable metal pattern (the comprising increased pressure board) mold closing except the injection moulding machine. In addition, in the situation in being used in the injection moulding machine, also can be the structure of injecting compression molding, injection pressure shaping, foaming and molding etc., moulding material is also without limits. In addition, also can be between fixing metal mould and movable metal pattern, to set the structure of the other movable metal pattern in centre or use fixing metal mould (being included in the structure that rotary table rotates) more than 1 and the structure of the movable metal pattern more than 1 (being included in the structure that rotary table rotates). In addition, mold closing mechanism also can be longitudinal type.

Claims (5)

1. mold closing mechanism, be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, carry out the mold closing mechanism of matched moulds by the clamping pressure cylinder, it is characterized in that,
Closing piston with above-mentioned clamping pressure cylinder is the border, if possess little pressure cylinder chamber the 2nd and the pressure cylinder chamber the 3rd that is supplied to work oil then produces thrust towards the closing piston side, pressure cylinder chamber the 1st that compression area is used than matched moulds.
2. mold closing mechanism, be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, carry out the mold closing mechanism of matched moulds by the clamping pressure cylinder, it is characterized in that,
Side at the closing piston of above-mentioned clamping pressure cylinder is provided with pressure cylinder chamber the 1st and the compression area 2nd pressure cylinder chamber littler than pressure cylinder chamber the 1st that matched moulds is used;
At the opposite side of above-mentioned closing piston, be provided with compression area and be connected pressure cylinder chamber the 4th on the above-mentioned pressure cylinder chamber the 1st than little pressure cylinder chamber the 3rd, above-mentioned pressure cylinder chamber the 1st with via pipeline and valve.
3. mold closing mechanism as claimed in claim 2, it is characterized in that, above-mentioned clamping pressure cylinder is provided in the inside of the dish of mold closing mechanism, from either side with the arranged in order of pressure cylinder chamber the 2nd, pressure cylinder chamber the 1st, pressure cylinder chamber the 4th and pressure cylinder chamber the 3rd on coaxial, the compression area of pressure cylinder chamber the 4th is littler and bigger than the compression area of pressure cylinder chamber the 3rd than the compression area of pressure cylinder chamber the 1st.
4. the method for operating of a mold closing mechanism, be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, by the clamping pressure cylinder, carry out the method for operating of the mold closing mechanism of matched moulds, it is characterized in that
Closing piston with above-mentioned clamping pressure cylinder is the border; possess little pressure cylinder chamber the 2nd and the pressure cylinder chamber the 3rd, pressure cylinder chamber the 1st that compression area is used than matched moulds; if pressure cylinder chamber the 2nd and pressure cylinder chamber the 3rd are supplied to work oil respectively, then produce thrust towards the closing piston side.
5. the method for operating of a mold closing mechanism, be by the mould switching mechanism make movable metal pattern with respect to the fixing metal mould approaching or butt, after halfnut and fastener card are ended, by the clamping pressure cylinder, carry out the method for operating of the mold closing mechanism of matched moulds, it is characterized in that
Side at the closing piston of above-mentioned clamping pressure cylinder is provided with pressure cylinder chamber the 1st and the compression area 2nd pressure cylinder chamber littler than pressure cylinder chamber the 1st that matched moulds is used;
At the opposite side of above-mentioned closing piston, be provided with compression area and be connected pressure cylinder chamber the 4th on the above-mentioned pressure cylinder chamber the 1st than little pressure cylinder chamber the 3rd, above-mentioned pressure cylinder chamber the 1st with via pipeline and valve;
Make pressure head when the mold closing direction moves, work oil is being supplied with in pressure cylinder chamber the 2nd, and carrying to pressure cylinder chamber the 1st, closing piston is moved to the mold closing direction to the work oil of major general pressure cylinder chamber the 4th;
When die sinking, work oil is supplied with in pressure cylinder chamber the 3rd, and the work oil of pressure cylinder chamber the 1st is carried to pressure cylinder chamber the 4th at least, closing piston is moved to the 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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Effective date of registration: 20200622

Address after: Tokyo, Japan

Patentee after: THE JAPAN STEEL WORKS, Ltd.

Address before: 2, Dagen, Kitasaki, Dafu, Aichi, Japan

Patentee before: Kabushiki Kaisha Meiki Seisakusho