CN1080179C - Clamping apparatus for injection molding machine - Google Patents
Clamping apparatus for injection molding machine Download PDFInfo
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- CN1080179C CN1080179C CN95104531A CN95104531A CN1080179C CN 1080179 C CN1080179 C CN 1080179C CN 95104531 A CN95104531 A CN 95104531A CN 95104531 A CN95104531 A CN 95104531A CN 1080179 C CN1080179 C CN 1080179C
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Abstract
To provide a locking apparatus wherein a hydraulic oil can be heated without providing specially a temp. elevating circuit for the hydraulic oil and locking action can be exerted just after closing a mold. The pressure receiving areas of a hydraulic pressure room 14 and an oil room 15 formed on both sides of a piston part 12 of a tie rod 10 are made equal and the hydraulic pressure room 14 and the oil room 15 are respectively connected with an hydraulic pressure source 40 and a tank T through a locking pipeline 44 and a returning pipeline 45. In addition, both hydraulic pressure rooms 14 and 15 are connected with each other through a connecting pipeline 47 in which a switch valve mechanism 48 is mounted. When the switch valve mechanism 48 is opened and a movable stage is driven, the hydraulic oil in the oil room 15 is wholly moved into the hydraulic pressure room 14 and locking action can be immediately obtained thereby and the switch valve mechanism 48 is opened and the hydraulic oil is circulated from the hydraulic pressure source 40 to the locking pipeline 44 and the tank T in this order through the returning pipeline 45, the oil room 15, etc., and the temp. of the hydraulic oil is elevated.
Description
The present invention relates to the clamping device of hydraulic pressure direct acting type injection molding machine, more specifically say, the present invention relates to a kind of like this clamping device, the moving die plate that dynamic model wherein is housed locks with respect to the fixed form that quiet mould is housed by hydraulic jack/piston apparatus, the hydraulic clamp that the present invention relates to is provided with clamping piston/oil cylinder mechanism and in order to drive the auxiliary drive unit of moving die plate, when moving die plate was driven by auxiliary drive unit, hydraulic fluid infeeded or discharges clamping piston/oil cylinder mechanism.
Hydraulic pressure direct acting type clamping device is wherein a kind of of the used numerous clamping devices of injection molding machine.Just as known, hydraulic pressure direct acting type clamping device is equipped with a clamp bracket that is fixed on the pedestal.The piston of clamping cylinder is directly connected on the moving die plate.When pressure oil infeeded the head of clamping cylinder, moving die plate just had been driven towards fixed form and is moving, to realize clamping.When pressure oil infeeded rod end one side of oil cylinder, moving die plate just left fixed form.
Because moving die plate is directly driven by clamping cylinder, so hydraulic pressure direct acting type clamping device is more simple than the clamping device structure of being furnished with toggle mechanism, and mold thickness need not to adjust.Yet the setting of clamp bracket causes cost to rise, and it is also longer to drive the required time of moving die plate.On the other hand, need bigger clamping force to prevent that mould is under the pressure of the resin that injects mold cavity and unexpected the unlatching.In order to obtain this bigger clamping force, cylinder diameter makes very big, so that bigger compression area is provided.Its result, the motion of piston is very slow, and the actuating speed of moving die plate is very low, thereby mould cycle is very long.
The open NO.224910/1992 of Japan Patent discloses and a kind ofly can drive the hydraulic pressure direct acting type clamping device that moving die plate arrives the mould bonding station rapidly thereby shortens mould cycle.As shown in Figure 5, this clamping device comprises: a fixed form 50, one moving die plates 51 and a tailgate 52.4 all are equipped with piston unit 54 with on fixed form 50 and the connecting rod 53,53 that tailgate 52 connects together.An end that surrounds 4 oil cylinders 55,55,56,56 of piston unit 54 all is fixed on the moving die plate 51.
In piston unit 54, the compression area of 4 connecting rods 53,53 all is arranged to different a pair of compression area mutually.
When pressure oil infeeded in the oil pocket of piston 54 both sides of a pair of oil cylinder 55,55 simultaneously, because the compression area difference, moving die plate 51 just was driven along clamping direction.Similarly, when pressure oil infeed simultaneously another to the oil cylinder of piston 54 both sides of oil cylinder 56,56 in the time, moving die plate 51 just is driven along the die sinking direction.In addition, when pressure oil infeeds oil pocket of 4 oil cylinders 55,55,56,56, just realize clamping action.
As mentioned above, traditional hydraulic pressure direct acting type device for clamping mould needs a clamp bracket, and because the diameter of clamping cylinder is very big thereby cost is expensive.Therefore the requirement of hydraulic fluid increases also is a shortcoming.On the other hand, in the clamping device that proposes among the open NO.224910/1992 of Japan Patent, be used to be connected and fixed on 4 connecting rods 53,53 of template 50 and tailgate 52 piston unit 54 all is housed, so just avoided above-mentioned defective.And because the compression area in the oil pocket of piston unit 54 both sides is unequal, its advantage is, by providing pressure oil just can promptly drive moving die plate 51 to two oil pockets simultaneously.In addition, by supply pressure oil in that oil pocket, just may realize clamping action with bigger clamping force with big compression area.
However, this device still leaves some room for improvement, for example, when pressure oil infeeds a pair of oil cylinder 55 simultaneously, in the oil pocket of 55 piston 54 both sides so that when promptly driving moving die plate 51, owing to do not take any other special measures to come to infeed or discharge pressure oil for another oil pocket to oil cylinder 56,56, thereby another is to the oil pocket emptying gradually of oil cylinder 56,56.If after moving die plate 51 drove and puts in place, another oil pocket to oil cylinder was empty, clamping action just can't begin immediately so.Be full of pressure oil (being hydraulic fluid) owing to be used for driving in the oil pocket of oil cylinder of moving die plate 51, in case provide pressure oil to these oil pockets, clamping action just comes into force.Yet, can only obtain half clamping force with this a pair of oil cylinder 55,55.Since need the time to another to the oil pocket of empty oil cylinder 56,56 in fuel feeding obtaining effective clamping force, thereby can't obtain required whole clamping forces a period of time, this just means that the injection molding operation can not begin immediately.
In order to address the above problem, another to can be all the time in the oil pocket of oil cylinder 56,56 hydraulic fluid abrim.However, the difference of compression area will make the oil circuit setting become very complicated.
In addition, this injection molding machine also is provided with special valve for oily temperature rise loop, makes oil circuit narrow by means of the joint door of valve, makes oil flow through this loop and makes oily temperature rise.Yet this set also will increase cost.
The course of work of front embodiment is described below.
In traditional injection molding machine, as shown in Figure 6, be provided with a special valve 50 and raise oily warm.When oily temperature rise switch placed ON, valve 50 was in the b position, and the oily route via 56 in the route 53 infeeds fuel tank, and the oil in the route 54 returns fuel tank.At this moment, oil will be through fixing joint door, and it is narrow that oil circuit becomes, and so oily temperature has just raise.
After die sinking was finished, the clamping device of traditional injection molding machine was not provided with the device that keeps its halted state.
Mould does not possess the function that keeps its halted state, and it is provided with a built-in spring, acts on the mold closing direction at die opening state lower spring active force, and it is pushed away stop position.The situation of mould closure often takes place during taking out moulded product, thereby mold damage is (owing to be equipped with core rod, carrying out the closed operation of mould before taking out moulded product will mold damage), perhaps therefore make unloading mechanism can't take molded product exactly away.
The objective of the invention is to provide a kind of clamping device that is used for hydraulic pressure direct acting type injection molding machine, this clamping device is simple in structure, and is with low cost, can promptly drive moving die plate, even come into force with clamping action.
Another object of the present invention provides a kind of hydraulic clamp with auxiliary drive unit, such as also have an auxiliary cylinder except clamping cylinder, promptly drives moving die plate with this, although thereby be provided with check valve and also have only the very little pressure loss.
Another object of the present invention provides a kind of hydraulic clamp, and it can drive at moving die plate and clamping action is come into force after putting in place, and can utilize and be not provided with special valve and the hydraulic circuit of Jie Men, by making oil circulation in loop oil that raises warm.
Above-mentioned purpose can be by realizing with lower device: a kind of clamping device, and it comprises, the fixed form that quiet mould is housed, a moving die plate and the fixed head that is fixed on the pedestal that dynamic model is housed; Fixed form and fixed head interconnect by some connecting rods, and moving die plate locks with respect to fixed form by these connecting rod guiding and by hydraulic jack/plug cock mechanism; In addition, moving die plate is driven by other drive unit and moves along mold closing direction or die sinking direction; It is characterized in that hydraulic jack/piston mechanism comprises some oil cylinders, the two ends of oil cylinder are contained in respectively on connecting rod and the moving die plate, and oil cylinder is arranged to round connecting rod; Separated and be arranged in the hydraulic cavities of piston unit both sides and the compression area of oil pocket equates by being contained in piston unit on the connecting rod; Hydraulic cavities and oil pocket are in open state usually, by a valve they are connected mutually during die sinking.
According to of the present invention, other drive unit is made of piston/oil cylinder unit.According to the present invention, hydraulic cavities and oil pocket are connected by adapter path, and described valve is the check valve of hydraulic control, and it is closed under the controlled pressure that clamps route.According to the present invention, hydraulic cavities and oil pocket are connected with an end that clamps route and backhaul route respectively, and the other end that clamps route and backhaul route is connected to hydraulic power source and fuel tank respectively.Hydraulic fluid clamps the check valve that is connected to hydraulic control in route and the backhaul route respectively, so that can flow into hydraulic cavities and oil pocket.According to the present invention, the check valve that is connected on the check valve that clamps the hydraulic control in the route and is connected on the hydraulic control in the backhaul route is opened by controlled pressure in the backhaul route and the controlled pressure that clamps in the route respectively.
Above-mentioned purpose can realize by such device: a kind of clamping device, it comprises, a piston/oil cylinder clamp mechanism and a auxiliary drive unit in order to the driving moving die plate, when moving die plate is driven by auxiliary drive unit, hydraulic fluid infeeds or discharges the clamping cylinder of piston/oil cylinder clamp mechanism by the check valve of hydraulic control, it is characterized in that the check valve of described hydraulic control is included in the clamping cylinder of piston/oil cylinder mechanism.
According to a kind of clamping device of the present invention, it comprises a piston/oil cylinder clamp mechanism and the auxiliary drive unit in order to the driving moving die plate, when moving die plate is driven by auxiliary drive unit, hydraulic fluid infeeds or discharges the clamping cylinder of piston/oil cylinder clamp mechanism by the check valve of hydraulic control, it is characterized in that, hydraulic jack/piston mechanism comprises some oil cylinders, and the two ends of oil cylinder are contained in respectively on connecting rod and the moving die plate, and oil cylinder is arranged to round connecting rod; Separated and be arranged in the hydraulic cavities of piston unit both sides and the compression area of oil pocket equates by being contained in piston unit on the connecting rod; Check valve by a hydraulic control is connected hydraulic cavities and oil pocket mutually; And the check valve of described hydraulic control is included in the clamping cylinder of piston/oil cylinder mechanism.
According to the present invention, the check valve of hydraulic control comprises a flange, and comprises the poppet that is arranged in the oil circuit that this flange is interior with clamping cylinder communicates.When controlled pressure acted on the poppet, poppet fell into valve seat to cut off oil circuit.
Driving moving die plate when mold closing direction or die sinking direction are moved with respect to fixed form, auxiliary drive unit (for example auxiliary cylinder unit) is used to promptly drive this template.
When moving die plate was driven, hydraulic fluid infeeded or discharges the clamping cylinder of piston/oil cylinder clamp mechanism by the check valve of hydraulic control.Because the check valve of hydraulic control is included in the clamping cylinder of piston/oil cylinder clamp mechanism, the diameter of this hydraulic control check valve is very big and the pressure loss is very little, and therefore, auxiliary drive unit can adopt very low driving pressure.
Realize clamping action by piston/oil cylinder clamp mechanism, and the resin of fusion is injected the die cavity of mould.After resin cooling and solidifying, utilize the die sinking promptly of auxiliary cylinder unit, so that take out the product after molded.
Gripping mechanism has substantially the same in function recited above.Owing to separated and be positioned at oil pocket connection mutually of piston both sides by the piston of hydraulic jack/plug cock mechanism by the check valve of a hydraulic control, so when moving die plate was driven by auxiliary drive unit, the hydraulic fluid in certain oil pocket was just all replaced in another oil pocket.
When the mould on the moving die plate with after the mould of fixed form engages, pressure oil just infeeds hydraulic jack/plug cock clamp mechanism, clamps so that begin.At this moment, make the closed check valve of hydraulic control by controlled pressure.
According to the present invention, after hydraulic jack/piston mechanism was realized clamping, controlled pressure just was applied on the poppet, went into valve seat so that promote headstock, cut off the oil circuit that communicates with clamping cylinder with this.
Driving moving die plate when mold closing direction or die sinking direction are moved with respect to fixed form, other drive unit (for example, other hydraulic jack/piston unit) is used to promptly drive this template.
Because the oil pocket of being separated by the piston of hydraulic jack/piston mechanism and being positioned at the piston both sides keeps open state under normal conditions and keeps connecting mutually when clamping operation (this valve just close) by a valve, so when moving die plate is driven, when just oil cylinder moved, the hydraulic fluid in oil pocket was just all replaced in another oil pocket.
When the dynamic model of moving die plate with after the quiet mould of fixed form engages, pressure oil just infeeds in hydraulic jack/plug cock mechanism, so that begin to clamp operation.At this moment, owing to the hydraulic fluid in the oil pocket is all replaced another oil pocket, make the latter be full of hydraulic fluid, clamping action just begins immediately.After clamping action was realized, valve just kept cutting out.
According to the present invention, valve keeps cutting out by the controlled pressure that clamps route.
After realizing clamping action by this way, the resin of fusion just injects the die cavity of the mould of locking like this.After the resin cooling of injecting and solidifying, move along the die sinking direction by other hydraulic jack/plug cock unit drives moving die plate.During except the clamping operation, above-mentioned valve is held open usually, so the hydraulic fluid in a back oil pocket is just all replaced in the previous oil pocket by above-mentioned valve.For above-mentioned reasons, moving die plate is just opened rapidly.Just as known, molded product was discharged pin (from mould) by one earlier and is released before being taken away by a unloading mechanism.Then, repeat above-mentioned operation.
Fig. 1 is the schematic diagram of clamping device first embodiment of the present invention.
Fig. 2 (a) to 2 (c) be the hydraulic circuit of relevant Fig. 1.
Fig. 3 is the partial sectional view of second embodiment of the invention.
Fig. 4 is the partial sectional view of the amplification of hydraulic circuit in Fig. 3 hydraulic clamp and clamping cylinder.
Fig. 5 is the schematic diagram of traditional clamping device.
Fig. 6 is the schematic diagram of the hydraulic circuit of Fig. 5.
The first embodiment of the present invention is described below.As shown in Figure 1, clamping device of the present invention comprises: some connecting rods, for example 4 connecting rods 10,10; The oil cylinder 13,13 that matches with each connecting rod respectively; An auxiliary cylinder unit 20; With a hydraulic circuit.
To comprise just as known by the mould that this clamping device drives and locks: a fixed form 1 that is fixed on the pedestal K; One equally also is the fixed head 2 that is fixed on the substrate K; And a moving die plate 4, it can be in shown in Figure 1 vertically the moving in guide rail 3 upper edges of pedestal K.In addition, quiet mould 5 is contained on the fixed form 1, and dynamic model 6 is contained on the moving die plate 4.
One end of connecting rod 10,10 all is fixed on the fixed head 2, and their other end all passes through nut 11,11 and is fixed on the fixed form 1.Therefore, fixed form 1 and fixed head 2 combine by 4 connecting rods 10,10, have predetermined spacing between the two.Moving die plate 4 is designed to and can be along the longitudinal movement under the guiding of these connecting rods 10,10.
Connecting rod 10,10 is also taken the effect of piston rod in hydraulic cylinder/piston mechanism.Piston 12,12 all is arranged between moving die plate 4 and the fixed head 2.Be provided with each oil cylinder 13,13 round piston 12,12 in addition, an end of oil cylinder 13,13 all is fixed on the moving die plate 4.
Connecting rod 10,10 is positioned at that part of in the oil cylinder 13,13 with regard to it, and its diameter all is identical.Therefore, act on the hydraulic cavities 14,14 on right side and the oil pocket 15,15 in left side by piston 12,12 respectively with identical pressure.
Being used for driving moving die plate 4 also is a piston/oil cylinder unit towards fixed form 1 motion or the auxiliary cylinder unit 20 that leaves fixed form 1.That is, it is provided with an oil cylinder 21 and the piston that can move 22 in oil cylinder.One end of oil cylinder 21 is fixed on the flange 23, and the latter and moving die plate 4 are made one.Piston rod 24 passes flange 23 slidably and is fixed on by nut 26 on the flange 25 of fixed form 1.
Piston/oil cylinder unit is that the internal diameter of such oil cylinder is less.In order to accelerate operating rate, can adopt the large discharge pump of a low output pressure.When pressure oil infeeded in the actuator chamber 27 on piston right side, moving die plate 4 was driven, and moved rapidly towards the direction of fixed form 1; And when pressure oil infeeds in the backhaul chamber 28 in piston left side, drive moving die plate 4 to move rapidly along the die sinking direction, fixed form 1 just speeds away.
Describe aforesaid hydraulic circuit below in detail.
Fig. 2 (a) has represented a hydraulic circuit, and it is used for providing pressure oil to the hydraulic cavities 14,14 of oil cylinder 13,13; For hydraulic cavities 14,14 and oil pocket 15,15 provide and release of hydraulic fluid; Or displacement hydraulic fluid wherein.More particularly, a three-position electromagnetic valve 42 is connected on the output route 41 of oil pump 40.Clamping route 44 and backhaul route 45 all is connected on the output of three-position electromagnetic valve 42.In addition, clamp route 44 and receive in the hydraulic cavities 14 of oil cylinder 13, backhaul route 45 is received in the oil pocket 15 of oil cylinder 13 opposite sides.
The check valve 43 that allows hydraulic fluid to flow to the hydraulic control of hydraulic cavities 14 is connected on and clamps in the route 44, and the check valve 46 that allows hydraulic fluid to flow to the hydraulic control of oil pocket 15 is connected in the backhaul route 45.When applying controlled pressure by backhaul route 45, the check valve 43 of hydraulic control leads to the path conducting of fuel tank T.When applying controlled pressure by clamping route 44, the check valve 46 of hydraulic control leads to the also conducting of path of fuel tank T.
The hydraulic cavities 14 and the oil pocket 15 of oil cylinder 13 interconnect by adapter path 47.When the time spent of doing that does not have controlled pressure, hydraulic fluid can flow freely between hydraulic cavities 14 and oil pocket 15.Yet when the magnetic valve 49 feasible controlled pressures that apply by clamping route 44 of a spring reset worked, the check valve 48 of hydraulic control just was closed.
Because the check valve 43 of hydraulic control, 46 are connected on respectively in clamping route 44 and the backhaul route 45, in hydraulic cavities 14 or oil pocket 15, lack under the situation of hydraulic fluid, when hydraulic fluid flowed between hydraulic cavities 14 and oil pocket 15, hydraulic fluid just automatically was fed to hydraulic cavities 14 or the oil pocket 15 via the check valve 43 or 46 of hydraulic control from fuel tank T.Therefore, as described in wanting, comprise that oil pocket 15 and adapter path 47 are at this interior system hydraulic fluid abrim always such as hydraulic cavities 14 below in conjunction with the working condition of clamping device.
The course of work of the clamping device of this embodiment of the present invention is described below.As shown in Figure 1, quiet mould and dynamic model 5,6 are contained in respectively on fixed form 1 and the moving die plate 4.Clamping process begins as follows:
Hydraulic fluid at first infeeds the actuator chamber 27 on piston 22 right sides in the auxiliary cylinder unit 20.Because piston rod 24 is fixed on the fixed form 1, so drive moving die plate 4 promptly towards fixed form 1 motion, until arriving the mould bonding station by oil cylinder 21.
Shown in Fig. 2 (a), because the magnetic valve 49 of three-position electromagnetic valve 42 and spring reset lays respectively at C position and a position, so the hydraulic fluid in each oil pocket 15 in oil cylinder 13 left sides just flows into each hydraulic cavities 14 via the check valve 48 and the adapter path 47 of hydraulic control.Because the compression area in oil pocket 15 and the hydraulic cavities 14 equates, the hydraulic fluid in the oil pocket 15 just all flows into hydraulic cavities 14.
When dynamic model 6 after rapidly arriving the mould bonding station under the driving of auxiliary cylinder unit 20, make the magnetic valve 49 of three-position electromagnetic valve 42 and spring reset switch to B position and b position respectively from the detection signal of limit switch with from the position signalling of control module.So, infeed each hydraulic cavities 14,14 through the check valve 43 that clamps route 44 and hydraulic control from the hydraulic oil of oil pump 40.Meanwhile, from the controlled pressure that clamps route 44 check valve 48 of hydraulic control is closed.Because each connecting rod 10,10 each piston 12,12nd is just fixed, therefore order about moving die plate 4 and 1 move along clamping direction towards fixed form.Because each hydraulic cavities 14 originally had been full of hydraulic fluid, so when infeeding hydraulic oil, clamping action comes into force.
Just as known, this moment the resin of fusion is injected quiet mould 5 and dynamic model 6 formed die cavities.
After the resin cooling and curing of fusion, three-position electromagnetic valve 42 is switched to the A position, so pressure oil is infeeded backhaul route 45 from oil pump 40.Controlled pressure in the backhaul route 45 makes the check valve 43 of hydraulic control open and make hydraulic cavities 14 releases.Meanwhile, the magnetic valve 49 of spring reset switches to a position.The hydraulic fluid that clamps in the route 44 is not re-used as controlled pressure, then the check valve 48 of hydraulic control is opened, so that adapter path 47 conductings, so hydraulic fluid can flow freely between hydraulic cavities 14,14 and oil pocket 15,15.Then, three-position electromagnetic valve 42 is switched to the C position, clamping route 44 and backhaul route 45 is all communicated with fuel tank, thereby the check valve 43,46 of hydraulic control is closed.Pressure oil is infeeded in the backhaul chamber 28 in 20 left sides, auxiliary cylinder unit again.Like this, the such as mentioned above rapid unlatching of moving die plate 4.Molded product was discharged pin (from mould) by one earlier and is released before being taken away by the unloading unit.
When the magnetic valve 49 of spring reset was placed in a position, the check valve 48 of hydraulic control kept its opening always in the die sinking process.Hydraulic fluid in the hydraulic cavities 14,14 all flows into oil pocket 15,15 as previously mentioned.
When liquid fluid flowed out from the hydraulic cavities 14 of oil cylinder 13, three-position electromagnetic valve 42 was switched to the A position, and made the magnetic valve 49 of spring reset switch to the b position.So the pressure oil from oil pump 40 acts on the check valve 43 of hydraulic control as controlled pressure, and only make this check valve 43 (with fuel tank T) conducting.When auxiliary cylinder unit 20 work, driving moving die plate 4 when the die sinking direction is moved, the flow through check valve 43 of hydraulic control of the hydraulic fluid in the hydraulic cavities 14 of oil cylinder 13 leaks into fuel tank T.
The present invention is not limited to the foregoing description, but can realize by other multiple mode.For example, although be the check valve 48 that is provided with hydraulic control in adapter path 47, also can be replaced with common magnetic valve.This magnetic valve is closed when clamping action is implemented, and is unlocked when moving die plate 4 motions.
Although auxiliary cylinder unit 20 is described as the form of piston-cylinder component, it also can be driven by other any driver element, is for example directly driven by gear-rackwork by electronic.In addition, in the above embodiment of the present invention, the check valve 43 of hydraulic control is opened by the controlled pressure in the backhaul route 45, the check valve 46,48 of hydraulic control is opened by the controlled pressure that clamps in the route 44, guarantees that with this breakdown action realizes and simplify the structure of hydraulic circuit reliably.Yet need not superfluous words, utilize auxiliary cylinder unit 20 check valve 43,46 and 48 of these hydraulic controls is opened at the controlled pressure that drives or produce during the work of clamping.
Though the above embodiment of the present invention is that self-evident, this clamping device can be by control module from line operate with regard to manual operation.Provide pressure oil although express a pump 40 in Fig. 2 (a) to an oil cylinder 13, obvious 4 oil cylinders 13,13 are by the while fuel feeding.
In the embodiment of the invention shown in Fig. 2 (a), when oily Wen Kaiwen switch places ON, three-position electromagnetic valve 42 is at first switched to the A position, so make oily sequential flow through backhaul route 45, clamping cylinder 13, adapter path 47, the check valve 48 of hydraulic control, enter clamping cylinder 13 once more, return fuel tank by clamping route 44 then.Circulation through such just might utilize the resistance of the check valve 43,46,48 of hydraulic control, and the resistance that utilizes adapter path 47 and other route, makes oily temperature rise.Magnetic valve 42 can be switched go back to the B position then.
Improved hydraulic circuit of the present invention is described below.
Fig. 2 (b) has represented a hydraulic circuit, and it is used for providing pressure oil to the hydraulic cavities 14,14 of oil cylinder 13,13; For hydraulic cavities 14,14 and oil pocket 15,15 provide and release of hydraulic fluid; Or displacement hydraulic fluid wherein.More particularly, the check valve 143 of a three-position electromagnetic valve 142 and a hydraulic control is connected on the output route 141 of oil pump 140.Pressure oil infeeds hydraulic cavities 14 via the check valve 143 of hydraulic control from clamping route 144.
In addition, be provided with an overflow valve 150 in the output route 141 of oil pump 140.
The course of work of the clamping device of this embodiment of the present invention is described below.As shown in Figure 1, quiet mould and dynamic model 5,6 are contained in respectively on fixed form 1 and the moving die plate 4.Clamping process begins as follows:
Hydraulic fluid at first infeeds the actuator chamber 27 on piston 22 right sides of auxiliary cylinder unit 20.Because piston rod 24 is fixed on the fixed form 1, so moving die plate 4 is promptly mobile towards fixed form 1 under oil cylinder 21 drives, until arriving the mould bonding station.
Because three-position electromagnetic valve 142 and spring reset magnetic valve 149 are shown in Fig. 2 (b), lay respectively at C position and a position, hydraulic fluid among the oil cylinder 13 left side oil pocket l5 just through check valve 148, the clamping route 144 of backhaul route 145, adapter path 147, hydraulic control, flows into hydraulic cavities 14.Because both compression areas of oil pocket 15 and hydraulic cavities 14 equate, so the hydraulic fluid in the oil pocket 15 all flows into hydraulic cavities 14.
Arrive the mould bonding station under dynamic model 6 orders about in auxiliary cylinder unit 20 rapidly, three-position electromagnetic valve 142 just is switched to the B position, so pressure oil just infeeds hydraulic cavities 14 from the check valve 143 and the clamping route 144 of oil pump 141 process hydraulic controls.Because each connecting rod 10,10 is each piston the 12, the 12nd just, fix, so moving die plate 4 just locks with fixed form 1.Owing to originally be full of hydraulic fluid in each hydraulic cavities 14,14, in a single day so infeed hydraulic oil, clamping action just comes into force.
Then as known as such, the resin that the preparation mould is formed the fusion of shape injects by quiet mould 5 and dynamic model 6 formed die cavities.
After the resin cooling and curing of fusion, three-position electromagnetic valve 142 and spring reset magnetic valve 149 are switched to C position and b position respectively.In the backhaul chamber 28 in 20 left sides, auxiliary cylinder unit, infeed pressure oil.Therefore, moving die plate 4 rapid opening like that as described above, molded product was discharged pin (from mould) by one earlier and is released before being taken away by the unloading unit.
Because the magnetic valve 149 of spring reset is switched in the b position, the hydraulic fluid that clamps in the route 144 acts on the check valve 148 of hydraulic control by spring reset magnetic valve 149 as controlled pressure, and valve 148 residing states allow hydraulic fluids to flow in opposite direction.Therefore, the hydraulic fluid in the hydraulic cavities 14,14 through clamping route 144, adapter path 147, the check valve 148 of hydraulic control, backhaul route 145, all flows into oil pocket 15,15 as noted earlier.
Then (can once more) drive and locking moving die plate 4 to carry out the injection molding operation.
When hydraulic fluid is discharged, three-position electromagnetic valve 142 is switched to the A position from the hydraulic cavities 14,14 of oil cylinder 13.Therefore, just act on the check valve 143 of hydraulic control, the conducting thereupon of this valve from the pressure oil of oil pump 140 as controlled pressure.When auxiliary cylinder unit 20 work and order about moving die plate 4 when the die sinking direction moves, the hydraulic fluid in the hydraulic cavities 14,14 of oil cylinder 13 just enters fuel tank T through the check valve 143 of hydraulic control.
The present invention is not limited to the foregoing description, but can realize by many alternate manners.For example, although be the check valve 148 that is provided with hydraulic control in adapter path 147, also can replace it with common magnetic valve.This closed electromagnetic valve when clamping operation, and when moving die plate 4 was driven, this magnetic valve was opened.
Though auxiliary cylinder unit 20 is described as the form of piston/oil cylinder unit, it also can be driven by any other driver element, is for example directly driven by gear-rackwork by motor.
Though the above embodiment of the present invention is with regard to manual operation, need not superfluous words, this clamping device can be by control module from line operate.Provide pressure oil although express a pump 40 in Fig. 2 (b) to an oil cylinder 13, obvious 4 oil cylinders 13,13 are by the while fuel feeding.
Another improved hydraulic circuit of the present invention is described below.
Fig. 2 (c) has represented a hydraulic circuit.It is used for providing pressure oil to the hydraulic cavities 14,14 of oil cylinder 13,13; For hydraulic cavities 14,14 and oil pocket 15,15 provide and release of hydraulic fluid; Promptly replace hydraulic fluid wherein.More particularly, a three-position electromagnetic valve 242 is connected on the output route 241 of pump 240.Clamping route 244 and backhaul route 245 all receives on the three-position electromagnetic valve 242.The check valve 243 of hydraulic control is connected on and clamps in the route 244 and the controlled pressure by backhaul route 245 makes it to communicate with fuel tank.Pressure oil infeeds hydraulic cavities 14 through the check valve 243 of hydraulic control.
Backhaul route 245 joins with the check valve 246 of oil pocket 15 and hydraulic control respectively.The check valve 246 of hydraulic control communicates with fuel tank by the controlled pressure that clamps route 244.In addition, oil pocket 15 and hydraulic cavities 14 interconnect by adapter path 247.Be connected to the check valve 248 of a hydraulic control in the adapter path 247, so that do not having under the situation of controlled pressure to provide unimpeded route for hydraulic cavities 14 and oil pocket 15.Also have,, the check valve 248 of hydraulic control is closed from the controlled pressure that clamps route 244 by the magnetic valve 249 of spring reset.
The course of work of the clamping device of this embodiment of the present invention is described below.As shown in Figure 1, quiet mould 5 and dynamic model 6 are contained in respectively on fixed form 1 and the moving die plate 4.Clamping process begins as follows:
Hydraulic fluid at first infeeds the actuator chamber 27 on piston 22 right sides of auxiliary cylinder unit 20.Because piston rod 24 is fixed on the fixed form 1, so moving die plate 4 is promptly mobile towards fixed form 1 under oil cylinder 21 drives, until arriving the mould bonding station.
Because the magnetic valve 249 of three-position electromagnetic valve 242 and spring reset lays respectively at C position and a position as shown in Figure 1, the hydraulic fluid in the oil cylinder 13 left side oil pockets 15 just passes through the check valve 248 of adapter path 247 and hydraulic control, flows into hydraulic cavities 14.Because both compression areas of oil pocket 15 and hydraulic cavities 14 equate, so the hydraulic fluid in the oil pocket 15 all flows into hydraulic cavities 14.
When dynamic model 6 rapid mould bonding station that arrives under auxiliary cylinder unit 20 drives, the magnetic valve 249 of three-position electromagnetic valve 242 and spring reset is just switched to B position and b position respectively.So pressure oil just infeeds hydraulic cavities 14 from the check valve 243 and the clamping route 244 of oil pump 240 process hydraulic controls.Simultaneously, by the check valve 248 of hydraulic control being closed from the controlled pressure that clamps route 244.Because each connecting rod 10,10 is each piston 12,12nd just, fix, so moving die plate 4 just locks with fixed form 1.Owing to originally be full of hydraulic fluid in each hydraulic cavities 14,14, in a single day so infeed pressure oil, clamping action just comes into force.
Then as known as such, the resin that the preparation mould is formed the fusion of shape injects by quiet mould 5 and dynamic model 6 formed die cavities.
After the resin cooling and curing of fusion, three-position electromagnetic valve 242 is switched to the A position, pressure oil infeeds backhaul route 245.So (utilizing the backhaul route) controlled pressure is opened hydraulic control magnetic valve 243, makes hydraulic cavities 14 releases.Simultaneously, the magnetic valve 249 of spring reset is switched to a position to open the check valve 248 of hydraulic control, make adapter path 247 conductings, the path between hydraulic cavities 14 and the oil pocket 15 is just unimpeded.Pressure oil is infeeded the backhaul chamber 28 in auxiliary cylinder assembly 20 left sides.Therefore, moving die plate 4 is just opened rapidly.During the preparation of being carried out after the injection molding completion status that in the control module (not shown) that is through with, sets and release (product), spring reset magnetic valve 249 is arranged on the b position all the time, therefore, flowing of the hydraulic fluid in the clamping cylinder is restricted always, and they are in blocking state always.Molded product was discharged pin (from mould) by one earlier and is released before being taken away by the unloading unit.In the die sinking process, because spring reset magnetic valve 249 has been switched to a position, thereby the check valve 248 of hydraulic control is held open state, hydraulic cavities 14, hydraulic fluid in 14 is through clamping route 244, adapter path 247, the check valve 248 of hydraulic control, backhaul route 245 all flows into oil pocket 15.
Then can such moving die plate 4 that drives and lock as described above before carrying out next time injection molding.
When hydraulic fluid is discharged, three-position electromagnetic valve 242 is switched to the A position from the hydraulic cavities 14,14 of oil cylinder 13.Therefore, act on the check valve 243 of hydraulic control as controlled pressure, make this valve conducting from the pressure oil of oil pump 40.When auxiliary cylinder unit 20 work, driving moving die plate 4 when the die sinking direction is moved, the flow through check valve 243 of hydraulic control of the hydraulic fluid in the hydraulic cavities 14 of oil cylinder 13 leaks into fuel tank T.
The present invention is not limited to the foregoing description, but can realize by many alternate manners.For example, although be the check valve 248 that is provided with hydraulic control in adapter path 247, also can replace it with common magnetic valve.This closed electromagnetic valve when clamping operation, and when moving die plate 4 was driven, this magnetic valve was opened.
Though auxiliary cylinder unit 20 is described as the form of piston/oil cylinder unit, it also can be driven by any other driver element, is for example directly driven by gear-rackwork by motor.
Though the above embodiment of the present invention is with regard to manual operation, need not superfluous words, this clamping device can be by control module from line operate.Provide pressure oil although express a pump 240 in Fig. 2 (c) to an oil cylinder 13, obvious 4 oil cylinders 13,13 are by the while fuel feeding.
Second embodiment
The second embodiment of the present invention is described below.As shown in Figure 3, adopt clamping device of the present invention to comprise: some piston/oil cylinder mechanisms, for example 4 groups of clamp mechanism 310,310 that constitute by piston/oil cylinder; One or several auxiliary cylinder unit 320; One is the hydraulic circuit of piston/oil cylinder mechanism 310,310 fuel feeding and oil extraction.
To comprise just as known by the mould that this clamping device drives and locks: a fixed form 301 that is fixed on the pedestal K; One equally also is the fixed head 302 that is fixed on the pedestal K; And a moving die plate 304, it can be in shown in Figure 3 vertically the moving in guide rail 303 upper edges of pedestal K.In addition, quiet mould 305 is contained on the fixed form 301, and dynamic model 306 is contained on the moving die plate 304.
Each piston/oil cylinder mechanism 310,310 all comprises connecting rod 311 and the clamping cylinder 313 that matches with connecting rod 311.One end of connecting rod 311,311 all is fixed on the fixed head 302, and its other end all passes through nut 318,318 and is fixed on the fixed form 301.Therefore, fixed form 301 and fixed head 302 interconnects with predetermined spacing by 4 connecting rods 311,311.Moving die plate 304 can be in the guiding lower edge lengthwise movement of connecting rod 311,311.
Connecting rod 311,311 is also as the piston rod in piston/work cylinder mechanism 310,310.Piston 312,312 is integrally formed on the piston rod between moving die plate 304 and the fixed head 302.Clamping cylinder 313,313 is respectively round separately piston 312,312.One end of clamping cylinder 313 all is fixed on the moving die plate 304.
At least that part of diameter that is arranged in clamping cylinder 313 on each connecting rod 311,311 all equates.Therefore, has equal compression area in hydraulic cavities 314,314 that forms in piston 312,312 right sides and left side respectively and the oil pocket 315,315.
Being used for driving moving die plate 304, to make it promptly towards the auxiliary cylinder unit 320 of fixed form 301 motions or the fixed form 301 that speeds away also be a piston/oil cylinder unit.That is, it is provided with an oil cylinder 321 and the piston that can move 322 in oil cylinder.One end of oil cylinder 321 is fixed on the flange 323, and the latter and moving die plate 304 are made one.Piston rod 324 passes flange 323 slidably and is fixed on by nut 326 on the flange 325 of fixed form 301.When pressure oil infeeds in the actuator chamber 327 on piston right side, just drive moving die plate 304 and move rapidly towards the direction of fixed form 301; In the time of in the backhaul chamber 328 on the left of pressure oil infeeds piston, just drive moving die plate 304 and move rapidly along the die sinking direction, fixed form 301 just speeds away.
Fig. 3 schematically shows and Fig. 4 has at length represented a hydraulic circuit 330, and it is used for providing pressure oil to the hydraulic cavities 314,314 of oil cylinder 313,313; For hydraulic cavities 314,314 and oil pocket 315,315 provide and release of hydraulic fluid; Or displacement hydraulic fluid wherein.This hydraulic circuit 330 comprises a three-position electromagnetic valve 342 on the output route 341 that is connected on oil pump 340; The check valve 343 of a hydraulic control; One is used for the check valve 348 of hydraulic control is carried out the spring reset magnetic valve 349 that on-off is controlled; And comprise an overflow valve 350 that is connected on oil pump 340 output routes 341.Hydraulic circuit 330 is received on 4 pistons/oil cylinder clamp mechanism.
One of them clamping cylinder is described below.The two ends of clamping cylinder 313 are respectively by flange 360,360 ' sealing.Flange 360,360 ' be assembling like this: they clamp from both sides with oil cylinder 313 by some connecting bolts that are not shown specifically in Fig. 4 and nut 316, the edge of oil cylinder 313 pack into flange 360,360 ' circumferential groove in.
As shown in Figure 4, on the flange 360 in left side, sizable valve opening 361 of diameter is deep into the flange 360 with certain desired depth from the outer surface of flange.A fair water cone 362 is contained on the valve opening 361.The pod apertures 363 of fair water cone 362 links to each other with the magnetic valve 349 of spring reset through circuit 364.
Have first oil circuit 365 that communicates with the oil pocket 315 of clamping cylinder 313 in the valve opening 361.Second oil circuit 366 also communicates with valve opening 361.
The flange 360 on Fig. 4 right side ' yet be provided with oil circuit as flange 360 does not only have poppet.Second oil circuit 366 that adapter path 345 makes flange 360 and flange 360 ' oil circuit communicate.In addition, the clamping route 344 of hydraulic circuit 330 insert flanges 360 ' oil pocket.
Allow the check valve 346 of flow of hydraulic fluid oil sump tank T to be connected in the adapter path 347, so that oil pocket 315 is communicated with fuel tank T.
The course of work of the clamping device of this embodiment of the present invention is described below.As shown in Figure 3, quiet mould 305 and dynamic model 306 are contained in respectively on fixed form 301 and the moving die plate 304.Clamping process begins with following method:
Hydraulic fluid at first infeeds the actuator chamber 327 on piston 322 right sides in the auxiliary cylinder unit 320.Because piston rod 324 is fixed on the fixed form 301, move rapidly towards fixed form 301 so just drive moving die plate 304, until arriving the mould bonding station.
Because the magnetic valve 346 of three-position electromagnetic valve 342 and spring reset lays respectively at C position and E position as shown in Figure 4, the access failure pressure source does not clamp route 344 so hydraulic fluid infeeds.In addition, there is not controlled pressure on each poppet 367,367, therefore, clamping cylinder 313, hydraulic fluid in the oil pocket 315,315 in 313 left sides is just from flange 360,360 flow through first oil circuit 365,365, the valve opening 361 of flange 360,361, second oil circuit 366,366 flows into hydraulic cavities 314,314.Because both compression areas of oil pocket 315,315 and hydraulic cavities 314,314 equate, so the hydraulic fluid of oil pocket 315,315 all flows into hydraulic cavities 314,314.
After measuring auxiliary cylinder unit 320 and being driven to the mould bonding station, just three-position electromagnetic valve 342 is switched to the B position, simultaneously spring reset magnetic valve 349 is switched to the D position.Therefore, clamp the hydraulic fluid process oil circuit 369 in the route 344, the magnetic valve 349 and the oil circuit 364 of spring reset, act on poppet 367,367 as controlled pressure.Poppet 367,367 is located on the valve seat 368,368, cuts off the fluid flow between second oil circuit 366,366 and first oil circuit 365,365.
Pressure oil from oil pump 340 passes through the check valve 343 of hydraulic control and clamps route 344, infeeds hydraulic cavities 314,314.Because piston 312,312nd is fixed, moving die plate 304 just locks mutually with fixed form 301.
Owing to originally be full of hydraulic fluid in the hydraulic cavities 314,314, in a single day so provide pressure oil from oil pump 340, clamping action just comes into force.After realizing clamping, three-position electromagnetic valve 342 is just got back to the C position, and spring reset magnetic valve 349 still is in the D position, with the retaining clip compaction forces, therefore, no longer provides the pressure oil condition still can keep clamping action at oil pump 340.
Then as known as such, the resin that the preparation mould is formed the fusion of shape injects by quiet mould 305 and dynamic model 306 formed die cavities.
After the cooling of the resin of fusion and solidifying,, three-position electromagnetic valve 342 is switched to the A position the hydraulic cavities of hydraulic fluid effluent oil cylinder 313,313 314,314 o'clock.Spring reset magnetic valve 349 still remains on the D position.So act on the check valve 343 of hydraulic control from the pressure oil of oil pump 340 as controlled pressure, the conducting and the check valve 348 of hydraulic control is suspended thereupon of this valve.When auxiliary cylinder unit 320 work, driving moving die plate 304 when the die sinking direction moves, the pressure oil in clamping cylinder 313,313 and the hydraulic cavities 314,314 just leaks into fuel tank T through the check valve 343 of hydraulic control.
After the cooling of the resin of fusion and solidifying, three-position electromagnetic valve 342 is switched to the C position, the magnetic valve 349 of spring reset is switched to the E position.Pressure oil infeeds the backhaul chamber 328 in 320 left sides, auxiliary cylinder unit then.Therefore, for above-mentioned reasons, moving die plate 304 is just opened rapidly, and molded product was discharged pin (from mould) by one and released before being taken away by the unloading unit.
In the die sinking process, spring reset magnetic valve 349 is placed in the E position, because poppet 367, do not acting on controlled pressure on 367, they just break away from valve seat 368,368, like this, hydraulic fluid just can flow in the other direction, thereby hydraulic cavities 314, hydraulic fluid in 314 just can be as described above such through adapter path 345,345, second oil circuit 366,366 and first oil circuit 365,365, all flow into oil pocket 315,315.
Then, can such moving die plate 304 that drives and lock as described above before carrying out (next time) injection molding.
Though auxiliary cylinder unit 320 is described as the form of piston/oil cylinder unit, it also can be driven by any other driver element, is for example directly driven by gear-rackwork by motor.Although the above embodiment of the present invention need not superfluous words with regard to manual operation, this clamping device can be by control module from line operate.
As mentioned above, the connecting rod between fixed form and the fixed head is yet as clamping is provided Piston rod in the hydraulic piston/oil cylinder mechanism of effect. Therefore just can save traditional folder Locking bracket, its advantage be, than traditional hydraulic pressure direct acting type device for clamping mould, Clamping device of the present invention can be with lower cost manufacturing.
Owing to the compression area in the cylinder chamber that is contained in the piston unit both sides on the connecting rod equates, And two the cylinder chamber usually be in open state and keep mutually connecting (only at folder by valve This valve just cuts out during tight operation), therefore, under unclamped state, when moving die plate by other During outer drive unit drives, it is complete that the hydraulic fluid in a certain cylinder chamber just passes through above-mentioned valve Deployment is changed in another cylinder chamber. Therefore, hydraulic fluid abrim always in the hydraulic cavities, one Dawn feeds hydraulic oil to hydraulic cavities, and clamping action just begins immediately effectively.
According to the present invention, drive unit is by piston/oil cylinder cell formation, thereby than gear The easier speed of carrying out of the drive unit that tooth bar consists of is controlled. In addition, hydraulic jack/plug cock Hydraulic fluid in the system can share. Its advantage is that the driver element of clamping device returns The road can be incorporated overall hydraulic circuit into. According to the present invention, because valve arrangement is hydraulic control Check valve, it is closed clamping under the controlled pressure of route, therefore feeds when pressure oil When clamping route with the realization clamping, the check valve of hydraulic control is autoshutdown just. Therefore, Compare with the situation of using other any controlled pressure, can effectively reduce error, Guarantee the realization of clamping action.
According to the present invention, owing to backhaul route and clamping route join with the cylinder chamber separately, and And the check valve that the cylinder chamber is provided with hydraulic control flows into oil pocket or hydraulic cavities with the permission hydraulic fluid, Therefore, when comprising, this lacks foot in system of hydraulic cavities, oil pocket and adapter path During enough hydraulic fluid, when adopting other driver element to make moving die plate towards the die sinking direction Or the mold closing direction is when moving, the check valve that this system just can be by these hydraulic controls from Row replenishes hydraulic fluid.
As mentioned above, according to the present invention, when moving die plate is driven by auxiliary drive unit, Hydraulic fluid feeds or discharges in piston/cylinder clamp through the check valve of hydraulic control Clamping cylinder. Because the clamping cylinder in piston/cylinder clamp is with hydraulic control Check valve, when moving die plate was driven by auxiliary drive unit, the pressure loss was very little, Even if thereby the operating pressure of auxiliary drive unit (for example auxiliary cylinder unit of living) is very low, also Can promptly drive moving die plate. Because the operating pressure of auxiliary cylinder unit is very low, The translational speed of moving die plate just is easy to control.
According to the present invention except above-mentioned effect is arranged, owing to be contained in (in order to be connected and fixed template With fixed head) compression area in the cylinder chamber of piston unit both sides on the connecting rod equates, and And two cylinder chambeies are connected mutually by the check valve of hydraulic control, therefore work as moving die plate by auxiliary When helping drive unit drives, the hydraulic fluid in a certain cylinder chamber just passes through the list of hydraulic control All replace in another cylinder chamber to valve. Therefore, flow of pressurized abrim always in the hydraulic cavities Body, in case feed pressure oil to hydraulic cavities, clamping action just begins immediately effectively.
According to the present invention, because comprising, the check valve of hydraulic control is contained in the clamping cylinder end Flange, and comprise be arranged in this flange with oil circuit that clamping cylinder communicates in carrying Rise head, the diameter of oil circuit just can make very big, to prevent the increase of the pressure loss. This Outward, the hydraulic control check valve of poppet form simplified structure effectively.
Claims (8)
1. be used for the device for clamping mould of injection molding machine, comprise:
The fixed form (1) that quiet mould (5) are housed;
The moving die plate (4) that dynamic model (6) are housed;
A fixed head (2) that is fixed on the pedestal (K), fixed form (1) and fixed head (2) interconnect by some connecting rods (10), and moving die plate (4) locks with respect to fixed form (1) by these connecting rod guiding and by hydraulic jack/piston mechanism; In addition, moving die plate (4) is driven by other drive unit (20) and moves along mold closing direction or die sinking direction; It is characterized in that,
Hydraulic jack/piston mechanism comprises an oil cylinder (13), the two ends of oil cylinder are contained in respectively on connecting rod (10) and the moving die plate (4), oil cylinder is arranged to round connecting rod (10), by be contained in piston unit (12) on the connecting rod (10) separate and be arranged in the hydraulic cavities (14) of piston unit both sides and the compression area of oil pocket (15) equates; Hydraulic cavities and oil pocket (14,15) are in open state usually, by a valve (48) they are connected mutually, and this valve is closed during clamping mold.
2. the device for clamping mould of injection molding machine as claimed in claim 1 is characterized in that, described other drive unit (20) comprises a piston/oil cylinder unit.
3. the device for clamping mould of injection molding machine as claimed in claim 1, it is characterized in that, hydraulic cavities (14) and oil pocket (15) are connected mutually by adapter path (47), described valve (48) is the check valve (48) of a hydraulic control, and this valve cuts out by the controlled pressure that clamps route (44).
4. the device for clamping mould of injection molding machine as claimed in claim 2, it is characterized in that, hydraulic cavities (14) and oil pocket (15) are connected mutually by adapter path (47), described valve (48) is the check valve (48) of a hydraulic control, and this valve cuts out by the controlled pressure that clamps route (44).
5. as the device for clamping mould of each described injection molding machine among the claim 1-4, it is characterized in that, hydraulic cavities (14) and oil pocket (15) are connected with an end that clamps route (44) and loop route (45) respectively, the other end that clamps route and backhaul route is connected to hydraulic power source and fuel tank respectively, clamps to be connected to respectively in route and the backhaul route (44,45) to make hydraulic fluid can flow into the check valve (43,46) of the hydraulic control in hydraulic cavities (14) or the oil pocket (15).
6. the device for clamping mould of injection molding machine as claimed in claim 5, it is characterized in that the check valve (46) that is connected on the check valve (43) that clamps the hydraulic control in the route (44) and is connected on the hydraulic control in the backhaul route (45) is opened by the controlled pressure in controlled pressure in the backhaul route (45) and the clamping route (44) respectively.
The hydraulic clamp of 7 moulds, comprise: piston/oil cylinder clamp mechanism and in order to drive the auxiliary drive unit (320) of moving die plate (304), when moving die plate is driven by auxiliary drive unit, hydraulic fluid infeeds or discharges piston/oil cylinder clamping cylinder (313) by the check valve (348) of hydraulic control, it is characterized in that, hydraulic piston/oil cylinder mechanism comprises a clamping cylinder (313), the two ends of oil cylinder are contained in respectively on connecting rod (311) and the moving die plate (304), and clamping cylinder is arranged to round connecting rod (311); And
Separated and be arranged in the hydraulic cavities of piston unit both sides and the compression area of oil pocket (14,15) equates by being contained in piston unit (312) on the connecting rod (311); By a valve (348) hydraulic cavities and oil pocket (14,15) are connected mutually; The check valve of described hydraulic control (348) is included in the clamping cylinder (313) of piston/oil cylinder mechanism.
8. device for clamping mould as claimed in claim 7 is characterized in that, the check valve of hydraulic control (348) comprising:
A flange (360) that is contained on clamping cylinder (313) end,
A poppet (367) that is arranged in the oil circuit (361 and 365) that communicates with clamping cylinder in this flange;
When controlled pressure acted on the poppet, poppet fell into valve seat to cut off oil circuit (365).
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP76413/94 | 1994-03-24 | ||
| JP07641394A JP3273855B2 (en) | 1994-03-24 | 1994-03-24 | Hydraulic mold clamping device |
| JP2232495 | 1995-01-18 | ||
| JP22324/95 | 1995-01-18 | ||
| JP8205995A JP2920732B2 (en) | 1995-01-18 | 1995-03-15 | Mold clamping device of injection molding machine |
| JP82059/95 | 1995-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1130563A CN1130563A (en) | 1996-09-11 |
| CN1080179C true CN1080179C (en) | 2002-03-06 |
Family
ID=27283802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104531A Expired - Fee Related CN1080179C (en) | 1994-03-24 | 1995-03-24 | Clamping apparatus for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1080179C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314502C (en) * | 2005-07-11 | 2007-05-09 | 华南理工大学 | Additional mould locking device of indirect extrusion casting |
| CN103029235B (en) * | 2012-12-07 | 2015-04-22 | 上海龙腾科技股份有限公司 | Clamping die conveying mechanism |
| CN105619588B (en) * | 2016-01-20 | 2018-04-10 | 广东科达洁能股份有限公司 | A kind of oil pressure automatic die-locking device |
| CN110576168A (en) * | 2019-10-23 | 2019-12-17 | 迟美丽 | Die casting die that can diversely fix |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1021161C (en) * | 1988-02-11 | 1993-06-09 | 法国法码通公司 | Upper internal nclear reactor equipments including flow seperation device |
-
1995
- 1995-03-24 CN CN95104531A patent/CN1080179C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1021161C (en) * | 1988-02-11 | 1993-06-09 | 法国法码通公司 | Upper internal nclear reactor equipments including flow seperation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1130563A (en) | 1996-09-11 |
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| C53 | Correction of patent for invention or patent application | ||
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Priority after: Original application date 1995.03.15 Original applicant JP Original application number 82059/95 Priority before: Zeng Jia |
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