CN108453233A - The lubricant supplying method of injection piston device and injection piston device - Google Patents
The lubricant supplying method of injection piston device and injection piston device Download PDFInfo
- Publication number
- CN108453233A CN108453233A CN201810151769.1A CN201810151769A CN108453233A CN 108453233 A CN108453233 A CN 108453233A CN 201810151769 A CN201810151769 A CN 201810151769A CN 108453233 A CN108453233 A CN 108453233A
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- Prior art keywords
- lubricant
- plunger
- pressure head
- drainage port
- molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/203—Injection pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention supplies the lubricant supplying method of a kind of injection piston device and injection piston device.Injection piston device is used for the supplying melting metal into the mold of die casting equipment, has：Plunger guide bush；Configure the plunger pressure head in plunger guide bush；It is connected with the plunger rod of plunger pressure head in end；And the lubricant supply unit to supply lubricant between plunger guide bush and plunger pressure head.Plunger guide bush has：It is supplied to the molten metal access of molten metal；With the injection port being open towards the inner space of mold.Plunger pressure head can move back and forth in molten metal access between the advance limit and the retrogressing limit.There is a plurality of lubricant flow path inside plunger rod.There are at least one party in plunger pressure head and plunger rod multiple lubricant drainage ports, lubricant drainage port position opening different in the circumferential direction of peripheral surface to be connect respectively with a plurality of lubricant flow path.When plunger pressure head is moved to from the advance limit retreats the limit, lubricant supply unit supplies lubricant according to the axial position of plunger pressure head at least one lubricant flow path in a plurality of lubricant flow path.
Description
Technical field
The present invention relates to a kind of injection piston device and the lubricant supplying methods of injection piston device.
Background technology
There is known a kind of die casting equipments in the past, injected into mold by using injection piston device molten metal to
The product of regulation shape is molded in the mould.It is public as the injection piston device used in such die casting equipment
Knowing has die casting machine blowning installation disclosed in such as Japanese Unexamined Patent Publication 7-164126 bulletins.
The die casting machine of the Japanese Unexamined Patent Publication 7-164126 bulletins has the injection set of hollow cylindrical with blowning installation
Cylinder and the plunger pressure head that can be moved back and forth in the shot sleeve.One end of the shot sleeve links with mold.From
The other end of the shot sleeve is inserted into the plunger pressure head to the inside of the shot sleeve.
In standby mode, the plunger pressure head is located relative to specified position that the mold has retreated (hereinafter referred to as
Going-back position), in the injection of molten metal, the plunger movable press head to close to the specified position of the mold (hereinafter, claim
For progressive position).The plunger pressure head turns again to the going-back position after injection.In addition, the shot sleeve exists
There is the supply mouth for supplying melting metal between the progressive position and the going-back position.
The die casting machine blowning installation also has between the supply mouth and the going-back position of the shot sleeve
There is air nozzle.The air nozzle remains in the shot sleeve by spraying air into the shot sleeve, to blow away
Inner wall on flash, and by the lubricating oil being injected into the shot sleeve from the supply mouth diffusion be applied to the injection
On the entire inner wall of sleeve.
Specifically, in the die casting machine blowning installation, the plunger pressure head is fed into the shot sleeve
Molten metal be injected into mold and return to after the going-back position, blown away by spraying air from the air nozzle
Remain in the flash on the inner wall of the shot sleeve.Later, lubricating oil is supplied into the shot sleeve from the supply mouth,
Air is sprayed from the air nozzle, the entire inner wall of the shot sleeve is applied to make the lubricating oil disperse and spread
On.
Invention content
In general, in injection piston device, if at the part that is contacted with plunger pressure head of inner wall of plunger guide bush
If frictional force increases, then the reduction of injection speed or the abrasion etc. of deviation, plunger guide bush are will produce.It is therefore preferable that described
Contact portion is coated with suitable lubricating oil (lubricant).But as disclosed in above-mentioned Japanese Unexamined Patent Publication 7-164126 bulletins
As, lubricating oil (lubricant) is being injected into shot sleeve (plunger guide bush) and make its diffusion using air from air nozzle
In the case of coating, it is difficult to control in the position of the inner wall coating lubricating oil (lubricant) of shot sleeve (plunger guide bush) and coating
Amount.
In this regard, the amount for increasing the lubricant supplied into plunger guide bush is contemplated, in the big model of inner wall of plunger guide bush
Exclosure application of lubricating.But if increasing the amount of the lubricant supplied into plunger guide bush, then lubricant can gasify and enter
In molten metal, therefore, it is possible to generate defect etc. in the molding molded part using mold.
This makes it difficult to inhibit lubricant to molded part while ensuring the lubricity between plunger guide bush and plunger pressure head
Influence (bad generation of molded part etc.).
It can ensure the same of the lubricity between plunger guide bush and plunger pressure head the purpose of the present invention is to provide a kind of
When inhibit the injection piston device of influence of the lubricant to molded part and the lubricant supplying method of injection piston device.
The injection piston device of an embodiment of the invention is for supply melting gold in the mold to die casting equipment
The injection piston device of category.The injection piston device has：The plunger guide bush of tubular；Columned plunger pressure head, is configured
In plunger guide bush；The plunger rod of shaft-like is connected with plunger pressure head at its end；And lubricant supply unit, to plunger bushing
Lubricant is supplied between cylinder and plunger pressure head.Plunger guide bush has：Molten metal access, molten metal are supplied to melting gold
Belong to access；And injection port, it is located at the one end of molten metal access, is open towards the inner space of mold.Plunger pressure head
Can in molten metal access the advance limit of injection port side and the another side of molten metal access the retrogressing limit it
Between move back and forth.Plunger rod is in the internal a plurality of lubricant flow path for having and axially extending.In plunger pressure head and plunger rod
At least one party have multiple lubricant drainage ports, different location of the multiple lubricant drainage port in the circumferential direction of peripheral surface
Opening, and be connected respectively with a plurality of lubricant flow path.Plunger pressure head in molten metal access after the advance limit is moved to
During moving back the limit, axial position of the lubricant supply unit according to plunger pressure head in molten metal access, to a plurality of lubricant
At least one lubricant flow path in flow path supplies lubricant.
The lubricant supplying method of the injection piston device of an embodiment of the invention is following injection piston devices
Lubricant supplying method, the injection piston device has：The plunger guide bush of tubular, with molten metal access；Cylinder
The plunger pressure head of shape, is configured in plunger guide bush；The plunger rod of shaft-like is connected with plunger pressure head at its end；And profit
Lubrication prescription supply unit supplies lubricant between plunger guide bush and plunger pressure head.The lubricant supplying method is arranged comprising lubricant
Go out process, the lubricant be discharged process in, plunger pressure head in molten metal access from the advance limit of injection port side to
When retreating limit movement, according to axial position of the plunger pressure head in molten metal access, using lubricant supply unit via
At least one party of a plurality of lubricant flow path of plunger rod axially inside extended from plunger pressure head and plunger rod is outside
Lubricant is repeatedly discharged in multiple lubricant drainage ports of different location opening in the circumferential direction of circumferential surface.
Injection piston device according to embodiment of the present invention can ensure plunger guide bush and plunger pressure head
While lubricity, inhibit influence of the lubricant to molded part.Also, injection piston according to embodiment of the present invention
The lubricant supplying method of device can reduce the friction and wear of plunger guide bush and plunger pressure head.
By the detailed description of the preferred embodiment for the present invention below the present invention can be more clearly understood that with reference to attached drawing
Above-mentioned and other feature, element, step, features and advantages.
Description of the drawings
Fig. 1 is the figure of the composition for the die casting equipment for schematically showing the injection piston device with embodiment.
Fig. 2 is the state that molten metal has been supplied in the molten metal access for be shown schematically in injection piston device
Figure.
Fig. 3 is the situation for schematically showing the plunger pressure head of injection piston device and being moved in molten metal access
Figure.
Fig. 4 is the figure for schematically showing the state for having injected molten metal into mold from injection piston device.
Fig. 5 is the figure for schematically showing the state that lubricant has been discharged when plunger pressure head is located at 1 position.
Fig. 6 is the figure for schematically showing the state that lubricant has been discharged when plunger pressure head is located at 2 position.
Fig. 7 is the figure for schematically showing the state that lubricant has been discharged when plunger pressure head is located at 3 position.
Fig. 8 is the flow chart for the action for showing die casting equipment.
Fig. 9 is the mobile speed for schematically showing axial position of the plunger pressure head in molten metal access and plunger pressure head
The figure of lubricant discharge situation when relationship between degree and the axial position.
Figure 10 is the flow chart for the action for showing the injection piston device in lubricant applying process.
Figure 11 is the figure of the outline structure of the plunger pressure head for the injection piston device for showing other embodiment.
Figure 12 is the figure that is compared to the gas flow contained by casting piece in each method of lubricant applying.
Specific implementation mode
Hereinafter, with reference to attached drawing, embodiments of the present invention will be described in detail.In addition, about the identical or phase in figure
Work as part, mark identical label, does not repeat its explanation.Also, the size of the component parts in each figure is not verily
It is demonstrated by the size of actual component parts and the dimension scale etc. of each component parts.
In addition, in the following description, the gravity direction that will be provided with the state of die casting equipment is known as " upper and lower directions ".And
And the direction for extending plunger rod 13 is known as " axial direction ".
(die casting equipment)
Fig. 1 is the structure for the die casting equipment 1 for schematically showing the injection piston device 10 with embodiments of the present invention
At figure.Die casting equipment 1 is by having from injection piston device 10 to the internal injection molten metal of mold 2 to mold
The device of the metal forming part of defined shape.Die casting equipment 1 has mold 2, movable plate 3, fixed disk 4, control unit 8 and note
Penetrate plunger device 10.
Mold 2, which has, to be fixed on the moveable die 5 of movable plate 3 and is fixed on the fixing mould 6 of fixed disk 4.Although no
Especially diagram, still, movable plate 3 can move on (left and right directions) in the horizontal direction in die casting equipment 1.Fixed disk 4 is fixed
In the frame (not shown) etc. of die casting equipment 1.Therefore, by making movable plate 3 be moved to the direction far from fixed disk 4, to mould
The moveable die 5 of tool 2 is moved to the direction separate relative to fixing mould 6.On the other hand, by making movable plate 3 to close to solid
The direction of price fixing 4 is moved, and is moved to the direction close relative to fixing mould 6 to the moveable die 5 of mold 2.
Moveable die 5 and fixing mould 6 have on opposed face respectively the shape corresponding to molded part recessed portion 5a,
6a.As a result, in the state that moveable die 5 is near fixing mould 6, chamber is formed between moveable die 5 and fixing mould 6
7 (inner spaces of mold).By injecting molten metal into chamber 7 from aftermentioned injection piston device 10, to mold
Molded part with defined shape.In addition, after being molded the molded part with defined shape using mold 2, it can
By making moveable die 5 far from fixing mould 6 to take out molded part out of mold 2.
Control unit 8 controls the driving of die casting equipment 1.Specifically, control unit 8 is to the movement of moveable die 5, note
Plunger device 10 is penetrated to control the injection etc. of molten metal.Control unit 8 according to from position detection part 16 (to aftermentioned injection
The axial position of the plunger rod 13 of plunger device 10 is detected) output detection signal, that is, according to the axial direction of plunger pressure head 12
Position controls the driving of die casting equipment 1.About further including the detailed of die casting equipment 1 including injection piston device 10
Action, be illustrated later.
(injection piston device)
Injection piston device 10 is the device for supplying melting metal in the chamber 7 to mold 2.Injection piston device 10
With plunger guide bush 11, plunger pressure head 12, plunger rod 13, lubricant supply unit 15 and position detection part 16.
Plunger guide bush 11 is the internal cylindric made of metal component with molten metal access 11a.Plunger guide bush 11
Axial one end runs through moveable die 5.That is, between the one end and moveable die 5 and fixing mould 6 of plunger guide bush 11
Chamber 7 connect.
Plunger guide bush 11 has molten metal access 11a, injection port 11b and supply mouth 11c.Molten metal access 11a
Be the section axially extended in cylindric plunger guide bush 11 it is circular access.Injection port 11b is located at plunger guide bush 11
One end, i.e. the one end of molten metal access 11a, and being open in the axial direction towards the chamber of mold 27.That is, injection port
11b is the opening portion for being injected into the molten metal in molten metal access 11a in the chamber 7 of mold 2.Supply mouth 11c
With the end of injection port 11b opposite side on the side wall of plunger guide bush 11, it is open upward.Supply mouth 11c is to be used for
The opening portion of supplying melting metal into molten metal access 11a.
Columned plunger pressure head 12 configures the molten metal in plunger guide bush 11 in a manner of it can move back and forth
In access 11a.That is, plunger pressure head 12 can move back and forth in molten metal access 11a.When plunger pressure head 12 is melting
When being moved back and forth in metal pathway 11a, plunger pressure head 12 is the advance limit, plunger pressure near the position of injection port 11b
First 12 near the position of the end with injection port 11b opposite sides (another side of molten metal access 11a) be retreat the limit.
Plunger pressure head 12 moves back and forth in molten metal access 11a between the advance limit and the retrogressing limit.Dotted line is used in Fig. 2
Indicate the advance limit of plunger pressure head 12, the retrogressing limit of plunger pressure head 12 indicated by the solid line.
Plunger rod 13 is the component that the shaft-like of plunger pressure head 12 is connected in end side.Plunger rod 13 is by drive (not shown)
Dynamic device, is moved in the axial direction relative to plunger guide bush 11.Molten metal access of the plunger pressure head 12 in plunger guide bush 11 as a result,
It is moved back and forth in 11a.
Plunger rod 13 has 2 lubricant flow paths 13a, the 13b axially extended inside it.It is supplied from aftermentioned lubricant
To portion 15 lubricant (such as lubricating oil) is supplied to lubricant flow path 13a, 13b.Defined axis of the plunger rod 13 on peripheral surface
To position and it is circumferential on different positions there is the upside lubricant being connected respectively with 2 lubricant flow paths 13a, 13b to arrange
Export 13c and downside lubricant drainage port 13d (multiple lubricant drainage ports).Upside lubricant drainage port 13c is (heavy upward
Above force direction) opening.Downside lubricant drainage port 13d is open (below gravity direction) downward.
Any one lubricant stream from aftermentioned lubricant supply unit 15 into 2 lubricant flow paths 13a, 13b as a result,
The lubricant of road supply is arranged from upside lubricant drainage port 13c or downside lubricant drainage port 13d towards the foreign side of plunger rod 13
Go out.
Position detection part 16 is detected the axial position (axial position) of plunger rod 13.That is, position can be utilized
Test section 16 is detected axial position of the plunger pressure head 12 in molten metal access 11a.It is exported from position detection part 16
Detection signal be input into the control unit 8 of die casting equipment 1.Control unit 8 is according to detection signal, i.e., according to the axis of plunger pressure head 12
To position, the driving of die casting equipment 1 is controlled.Also, the detection signal of input is output to aftermentioned lubrication by control unit 8
Agent supply control part 50.
Lubricant supply unit 15 supplies lubricant between the inner surface and plunger pressure head 12 of plunger guide bush 11.It is specific and
Speech, any one lubricant flow path supply profit of the lubricant supply unit 15 into 2 lubricant flow paths 13a, 13b of plunger rod 13
Lubrication prescription.
Lubricant supply unit 15 has lubricant supply control part 50, pump 61, switching part 62 and lubricant canister 63.At this
In embodiment, lubricant supply unit 15 has 3 pumps 61.3 pumps 61 are from the lubricant canister 63 of lubricant is stored with to plunger
Any one lubricant flow path in 2 lubricant flow paths 13a, 13b in bar 13 supplies lubricant.Switching part 62 is by for example cutting
The compositions such as valve are changed, the connection of 3 pumps 61 and 2 lubricant flow paths 13a, 13b in plunger rod 13 is switched over.It is specific and
Speech, in this case, by 1 in the pump of switching part 62,3 61 in 2 lubricant flow paths 13a, 13b
Any one lubricant flow path connects.Pump 61 and switching part 62 are identical as the previous composition of pump and switching valve respectively, therefore, save
The slightly detailed description of pump 61 and switching part 62.
Lubricant supply control part 50 is with the pump control unit 51 controlled the driving of pump 61 and to switching part 62
Drive the switch control portion 52 controlled.Switch control portion 52 drives switching part 62 according to the axial position of plunger rod 13
It is dynamic, it is connect with any one lubricant flow path in 2 lubricant flow paths 13a, 13b to pump 1 in 61 by 3.Pump control
Portion 51 processed by 62 pairs of pumps 61 being connect with any one lubricant flow path in 2 lubricant flow paths 13a, 13b of switching part into
Row driving, to supply lubricant into a lubricant flow path.
In addition, in the present embodiment, in plunger pressure head 12 as described later from advance pole in molten metal access 11a
Limit draws back when the limit moves and 3 lubricants is discharged.Switching part 62 is in each discharge by different pumps 61 and 2 lubricant streams
Any one lubricant flow path connection in road 13a, 13b.That is, in the present embodiment, 3 pumps 61 are arranged as corresponding to each time
The dedicated pump gone out uses.Thereby, it is possible to the lubricants that the discharge that is in due course is suitable for the amount of each discharge.
Lubricant is input to the relevant signal of axial position of plunger pressure head 12 from the control unit 8 of die casting equipment 1 to supply
To in control unit 50.In plunger pressure head 12 during drawing back limit movement from the advance limit in molten metal access 11a, profit
Whether lubrication prescription supply control part 50 reaches plunger pressure head 12 according to signal 3 positions of aftermentioned 1st position to the 3rd position
In some position judged.Certain in 3 positions that plunger pressure head 12 reaches aftermentioned 1st position to the 3rd position
In the case of a position, lubricant supply control part 50 makes switching part 62 be driven by switch control portion 52, and utilizes
Pump control unit 51 makes pump 61 be driven.
3rd position is column when marching forward limit movement from the retrogressing limit in molten metal access 11a when plunger pressure head 12
The position (contact position) being in contact on the upside of plug pressure head 12 and the inner surface of plunger guide bush 11.3rd position is for example shown in Fig. 7
Plunger pressure head 12 position.
Due to supplying the molten metal of high temperature into molten metal access 11a, plunger guide bush 11 is due to molten metal
Heat and be deformed.In this case, since molten metal is located at the downside of molten metal access 11a, with plunger
On the axially vertical section of sleeve 11, the downside expansion easier than upside of plunger guide bush 11.As a result, plunger guide bush 11
The center portion of length direction is in protrusion sigmoid downward.
Therefore, when marching forward limit movement from the retrogressing limit in molten metal access 11a when plunger pressure head 12, plunger pressure
First 12 with the upper contact of the inner surface of plunger guide bush 11.
2nd position is that the movement speed of the plunger pressure head 12 when plunger pressure head 12 marches forward limit movement from the retrogressing limit is cut
Change the position (speed switching position) of speed equal with specified value or bigger than the specified value into.2nd position is for example shown in Fig. 6
Plunger pressure head 12 position.
In the present embodiment, when molten metal is injected into the chamber 7 of mold 2 by injection piston device 10, molten
The movement speed for melting the plunger pressure head 12 in metal pathway 11a is initially low speed, and from switching to halfway, high speed is (equal with specified value
Or the speed bigger than specified value).It, can thereby, it is possible to prevent comprising air etc. in the molten metal in molten metal access 11a
Prevent the quality of the molded part molded using mold 2 from reducing.
At the speed switching position of above-mentioned plunger pressure head 12, plunger pressure head 12 is than retreating the limit closer to the advance limit.
Therefore, compared with plunger pressure head 12 is located at the case where retreating the limit, the length of the plunger rod 13 in molten metal access 11a becomes
It is long.In this way, plunger rod 13 is easy to tilt downwards, plunger pressure head 12 is easy to the contacts-side-down with the inner surface of plunger guide bush 11.
1st position is the position between speed switching position and the advance limit.1st position is plunger for example shown in fig. 5
The position of pressure head 12.At this location, 12 specific rate switching position of plunger pressure head is close to the advance limit, and therefore, plunger rod 13 is more
Add and is easy to tilt downwards.Therefore, contacts-side-down of the plunger pressure head 12 more easily with the inner surface of plunger guide bush 11.
(action of die casting equipment)
Next, the action about the die casting equipment 1 with above-mentioned composition, is illustrated using Fig. 2 to Fig. 4 and Fig. 8.
Fig. 2 to Fig. 4 is the figure for the action for showing injection piston device.Fig. 8 is the flow chart of the summary for the action for showing die casting equipment 1.
After flow shown in Fig. 8 starts (beginning), in step SA1, control unit 8 makes the movement of movable plate 3 thus can
Moving mold 5 is close to fixing mould 6.
In step SA2, the control unit 8 of die casting equipment 1 makes feeding molten metal portion (not shown) to injection piston device
Supplying melting metal M in 10.At this point, molten metal M is supplied to molten metal access from the supply mouth 11b of plunger guide bush 11
(with reference to the blank arrowhead of Fig. 2) in 11a.It, can also be in addition, the action of step SA1 and step SA2 can also be to be carried out at the same time
The action of step SA1 is carried out after the action of step SA2.
Later, in step SA3, control unit 8 makes injection piston device 10 inject molten metal into the chamber 7 of mold 2.
Specifically, control unit 8 is by driving the plunger rod 13 of injection piston device 10, to keep plunger pressure head 12 logical from molten metal
The retrogressing limit (position of plunger pressure head 12 shown in Fig. 2) in the 11a of road (indicates by a dotted line towards the advance limit in Fig. 2
The position of plunger pressure head 12) it is mobile.At this point, the movement speed of plunger pressure head 12 retreats the limit in molten metal access 11a internal ratios
At the position of the advance limit, high speed is switched to from low speed (with reference to Fig. 3).Moreover, molten by making plunger pressure head 12 be moved to
Melt the advance limit of metal pathway 11, the molten metal M in molten metal access 11 can be injected into the chamber 7 of mold 2
(with reference to Fig. 4).In addition, the plunger pressure head 12 for being moved to the advance limit stops at the advance limit.
Show plunger pressure head 12 in molten metal access 11 from the column retreated when the limit is moved towards the advance limit in Fig. 9
Fill in the variation of the movement speed of pressure head 12.In fig.9, solid line is the movement speed of plunger pressure head 12, and dotted line is will to drive plunger
When bar 13 value obtained after speed conversion is carried out from the signal that control unit 8 exports.
As shown in figure 9, when plunger pressure head 12 starts in molten metal access 11 from the limit is retreated towards the shifting of the advance limit
When dynamic, the movement speed of plunger pressure head 12 rises to as certain speed.As noted previously, as the heat of molten metal M, plunger bushing
The axial center portion of cylinder 11 is in protrusion sigmoid downwards.Therefore, it is moved in the molten metal access 11 of plunger guide bush 11
The upper contact of dynamic plunger pressure head 12 and the inner surface of plunger guide bush 11.The contact position is the movement speed of plunger pressure head 12
As the position (position of the III in Fig. 9) of certain speed.
Also, when plunger pressure head 12 marches forward limit advance from the retrogressing limit of molten metal access 11, in regulation model
After enclosing the certain speed movement in (section between III and II in Fig. 9) with low speed (such as 0.2m/s), movement speed quilt
Switch to high speed (such as 2m/s) (section between II and I in Fig. 9).The movement speed of plunger pressure head 12 is from the certain of low speed
The position (position of the II in Fig. 9) that speed switches to speed equal with specified value or bigger than specified value is speed toggle bit
It sets.
In addition, between speed switching position and the advance limit, plunger pressure head 12 is contacted with the inner surface of plunger guide bush 11,
Therefore, the frictional force generated between plunger pressure head 12 and the inner surface of plunger guide bush 11 increases.In speed switching position with before
It is the position of the I in Fig. 9 into the position that plunger pressure head 12 is contacted with the inner surface of plunger guide bush 11 between the limit.
In step SA4 shown in Fig. 8, be injected into molten metal in mold 2 it is cooled and after curing (when cooling regulation
Between after), control unit 8 to make direction of the moveable die 5 far from fixing mould 6 make movable plate 3 move.Later, it takes out in mold 2
The molded part molded.
In following step SA5, using releasing agent apparatus for coating (not shown) in moveable die 5 and fixing mould 6
Recessed portion 5a, 6a surface coated release agent.
In step SA6, control unit 8 by drive plunger rod 13, to make plunger pressure head 12 start from the advance limit to
Retreat limit movement.
In step SA7, when plunger pressure head 12 draws back limit movement from the advance limit, lubricant supply unit 15 is utilized
Lubricant is discharged together with air from the upside lubricant drainage port 13c or downside lubricant drainage port 13d of plunger rod 13.
That is, in step SA7, the lubricant applying of the application of lubricating between plunger pressure head 12 and the inner surface of plunger guide bush 11 is carried out
Process.Lubricant applying process in step SA7 illustrates later.
After step SA7, terminate the flow (end).In the case where continuing to be molded next molded part, die casting equipment 1
The action of return to step SA1 and repetition flow shown in Fig. 8.
(lubricant applying process)
Next, about the lubricant applying process carried out in step SA7 shown in Fig. 8, Fig. 5 to Fig. 7 and figure are used
10 illustrate.Fig. 5 to Fig. 7 is the figure for the situation for schematically showing the lubricant applying in injection piston device 10.Figure 10
It is the figure for the flow for showing lubricant applying process.
When flow shown in Fig. 10 starts (beginning), in step SB1, lubricant supply control part 50 is according to via control
Whether the detection signal for the position detection part 16 that portion 8 processed inputs, the 1st of molten metal access 11a the is reached to plunger pressure head 12
Position is judged.1st position is the position between the advance limit and following positions (speed switching position), the position (speed
Degree switching position) it is plunger pressure head when plunger pressure head 12 marches forward limit movement in molten metal access 11a from the retrogressing limit
12 movement speed switches to the position of speed equal with specified value or bigger than specified value (with reference to Fig. 5).
At the 1st position, 12 specific rate switching position of plunger pressure head is close to the advance limit, therefore, plunger rod 13 be easy to
Inclined downward.Therefore, plunger pressure head 12 is easy to the contacts-side-down with the inner surface of plunger guide bush 11.In addition, the 1st position is in Fig. 9
In be I position.
In step SB1, in the case where being determined as the case where plunger pressure head 12 reaches 1 position (the case where being), advance to
Step SB2.In step SB2, the pump 61 that 3 pump in 61 is connected to by switching part 62 and is discharged with downside lubricant
Lubricant flow path 13b connected mouth 13d.Then, a pump 61 is driven by pumping control unit 51, to make lubricant and air one
And it is discharged from downside lubricant drainage port 13d to the foreign side of plunger rod 13 (with reference to the arrow of Fig. 5).Lubricant is applied as a result,
To the inner surface of plunger guide bush 11, therefore, lubricant is fed into the inner surface of plunger guide bush 11 and in molten metal access 11a
Between the interior plunger pressure head 12 towards retrogressing limit movement.
In step SB1, in the case where being determined as the case where plunger pressure head 12 is without reaching 1 position (no situation), repeat
The judgement of step SB1 is until being determined as that plunger pressure head 12 reaches 1 position.
It is discharged from downside lubricant drainage port 13d in step SB2 in the step SB3 entered after lubricant, lubrication
Whether agent supply control part 50 arrives plunger pressure head 12 according to the detection signal of the position detection part 16 inputted via control unit 8
The 2nd position for having reached molten metal access 11 is judged.2nd position is speed switching position (with reference to Fig. 6).
At the speed switching position (the 2nd position) of above-mentioned plunger pressure head 12, as described above, plunger rod 13 is easy to downwards
It tilts, plunger pressure head 12 is easy to the contacts-side-down with the inner surface of plunger guide bush 11.In addition, the 2nd position is the position of II in fig.9
It sets.
In step SB3, in the case where being determined as the case where plunger pressure head 12 reaches 2 position (the case where being), advance to
Step SB4.In step SB4, switching part 62 pumps 3 a pump 61 except the pump used in step SB2 in 61
It is connected to the lubricant flow path 13b being connected with downside lubricant drainage port 13d.Then, a pump is driven by pumping control unit 51
61, to make lubricant with air together from downside lubricant drainage port 13d to the discharge of the foreign side of plunger rod 13 (with reference to Fig. 6's
Arrow).Lubricant is applied to the inner surface of plunger guide bush 11 as a result, and therefore, lubricant is fed into the interior of plunger guide bush 11
Between surface and the plunger pressure head 12 moved towards the retrogressing limit in molten metal access 11a.
In step SB3, in the case where being determined as the case where plunger pressure head 12 is without reaching 2 position (no situation), repeat
The judgement of step SB3 is until being determined as that plunger pressure head 12 reaches 2 position.
It is discharged from downside lubricant drainage port 13d in step SB4 in the step SB5 entered after lubricant, lubrication
Whether agent supply control part 50 arrives plunger pressure head 12 according to the detection signal of the position detection part 16 inputted via control unit 8
The 3rd position for having reached molten metal access 11 is judged.3rd position, which is plunger pressure head 12, marches forward the limit from retreating the limit
The position of plunger pressure head 12 and the upper contact of the inner surface of plunger guide bush 11 when mobile.That is, the 3rd position is speed switching position
Position between the retrogressing limit (with reference to Fig. 7).
As noted previously, as the heat of molten metal, the center portion of the length direction of plunger guide bush 11 is in convex downward
Go out sigmoid.When marching forward limit movement from the retrogressing limit in molten metal access 11a when plunger pressure head 12 as a result, plunger
The upper contact of pressure head 12 and the inner surface of plunger guide bush 11.The 3rd position as the contact position is the position of III in fig.9
It sets.
In step SB5, in the case where being determined as the case where plunger pressure head 12 reaches 3 position (the case where being), advance to
Step SB6.It, will be other than the pump used in step SB2, SB4 in 3 pumps 61 by switching part 62 in step SB6
Pump 61 is connected to the lubricant flow path 13a being connected with upside lubricant drainage port 13c.Then, by pumping the driving of control unit 51 one
A pump 61, to make lubricant with air together from upside lubricant drainage port 13c to the discharge of the foreign side of plunger rod 13 (with reference to figure
7 arrow).Lubricant is applied to the inner surface of plunger guide bush 11 as a result, and therefore, lubricant is fed into plunger guide bush 11
Inner surface and in molten metal access 11a towards retreat the limit movement plunger pressure head 12 between.
In step SB5, in the case where being determined as the case where plunger pressure head 12 is without reaching 3 position (no situation), repeat
The judgement of step SB5 is until being determined as that plunger pressure head 12 reaches 3 position.
In step SB6 after lubricant is discharged in upside lubricant drainage port 13c, terminate the flow (end).
Herein, the axial position according to plunger pressure head 12 in molten metal access 11a is from upside lubricant drainage port 13c
Or step SB2, SB4, SB6 of downside lubricant drainage port 13d discharge lubricants are corresponding with lubricant discharge process.Advancing
The step SB2 and the 1st process phase of discharge of lubricant is discharged between the limit and speed switching position from downside lubricant drainage port 13d
It is corresponding.The step SB4 and the 2nd process phase of discharge of lubricant is discharged from downside lubricant drainage port 13d at speed switching position
It is corresponding.The step SB6 and row of lubricant is discharged from upside lubricant drainage port 13c between speed switching position and the retrogressing limit
It is corresponding to go out the 3rd process.
As described above, via a plurality of lubricant flow path 13a, 13b in plunger rod 13 from the upside lubricant of plunger rod 13
Lubricant is discharged in outlet 13c or downside lubricant drainage port 13d, so as to more efficiently to the interior table of plunger guide bush 11
Lubricant is supplied between face and plunger pressure head 12.Thereby, it is possible to reduce the friction and wear of plunger guide bush 11 and plunger pressure head 12.
Moreover, according to the above configuration, can between plunger guide bush 11 and plunger pressure head 12, needs opportunity and need
The part supply lubricant wanted.Thereby, it is possible to inhibit to supply extra lubricant between plunger guide bush 11 and plunger pressure head 12,
Therefore, it is possible to inhibit to cause molded part generation bad by lubricant.
Also, plunger rod 13 have upside lubricant drainage port 13c and downside lubricant drainage port 13d, so as to
Lubricant is effectively supplied between the inner surface and plunger pressure head 12 of plunger guide bush 11.Therefore, it is possible to further decrease plunger bushing
The friction and wear of cylinder 11 and plunger pressure head 12.
In die casting equipment 1, when plunger pressure head 12 moves in molten metal access 11a, plunger pressure head 12 relative to
The inner surface of plunger guide bush 11 is easy position in above-below direction and generates contact.Therefore, as described above, by making plunger rod 13 have
The downside lubricant drainage port 13d for having the upside lubricant drainage port 13c being open upward and being open downward, Neng Gougeng
The contact portion being reliably in contact to plunger guide bush 11 with plunger pressure head 12 is added to supply lubricant.Therefore, it is possible to further subtract
The friction and wear of pillar plug sleeve 11 and plunger pressure head 12.
Also, in above-mentioned composition, when plunger pressure head 12 is drawn back pole in molten metal access 11a from the advance limit
When limit is mobile, the plunger pressure head 12 when plunger pressure head 12 marches forward limit movement in molten metal access 11a from the retrogressing limit
At the position contacted with the inner surface of plunger guide bush 11, lubricant supply unit 15 moistens from upside lubricant drainage port 13c and downside
The lubricant drainage port for the contact portion that close plunger pressure head 12 in lubrication prescription outlet 13d is in contact with plunger guide bush 11 is discharged
Lubricant.
Thereby, it is possible at the position that plunger pressure head 12 is contacted with the inner surface of plunger guide bush 11, more reliably to column
The contact portion supply lubricant that plug pressure head 12 is in contact with plunger guide bush 11.Therefore, it is possible to plunger pressure head 12 and plunger bushing
Cylinder 11 between effectively supply lubricant, therefore, it is possible to further suppress by lubricant cause molded part generate it is bad, simultaneously
The friction and wear of plunger guide bush 11 and plunger pressure head 12 can be further decreased.
In above-mentioned composition, lubricant supply unit 15 has：Multiple pumps 61；Switching part 62, to it is multiple pump 61 with it is more
The connection of lubricant flow path 13a, 13b switch over；And lubricant supply control part 50, to multiple pumps 61 and switching
The driving in portion 62 is controlled.
Thereby, it is possible to be supplied respectively to lubricant to a lubricant flow path in a plurality of lubricant flow path 13a, 13b.Cause
This, can arrange via a lubricant flow path in a plurality of lubricant flow path 13a, 13b from upside lubricant on different opportunitys
It exports 13c and downside lubricant drainage port 13d and supplies lubricant.
Also, using identical pump repeatedly discharge lubricant, it is possible to the discharge pressure of pump reduce to
The lubricant of requirement can not be discharged from lubricant drainage port.But as described above, by using switching part 62 to multiple pumps 61
Connection between a plurality of lubricant flow path 13a, 13b switches over, so as to inhibit the reduction of the discharge pressure pumped, because
This, can be to the lubricant for supplying requirement between plunger pressure head 12 and plunger guide bush 11.
In above-mentioned composition, the number of units for the pump that multiple pumps 61 include is equal to when plunger pressure head 12 is in molten metal access
It is discharged from upside lubricant drainage port 13c or downside lubricant drainage port 13d when drawing back limit movement from the advance limit in 11a
The number of lubricant.Lubricant supply control part 50 has the switch control portion 52 controlled to the driving of switching part 62 and right
The pump control unit 51 that the driving of pump 61 is controlled.When plunger pressure head 12 in molten metal access 11a from the advance limit backward
When being discharged every time from upside lubricant drainage port 13c or downside lubricant drainage port 13d when moving back limit movement, switching control
Portion 52 makes the different pumps 61 in multiple pumps 61 and a lubricant flow path in lubricant flow path 13a, 13b by switching part 62
Connection.Pump control unit 51 by the pump 61 being connect with a lubricant flow path make lubricant via a lubricant flow path from this
The connected upside lubricant drainage port 13c of one lubricant flow path or downside lubricant drainage port 13d discharges.
It, can when lubricant is discharged from upside lubricant drainage port 13c or downside lubricant drainage port 13d every time as a result,
Lubricant is supplied from a lubricant flow path in different pumps 61 couples of lubricant flow paths 13a, 13b in multiple pumps 61.Therefore,
It can realize and be arranged respectively from upside lubricant via a lubricant flow path in lubricant flow path 13a, 13b on defined opportunity
Export the composition of 13c or downside lubricant drainage port 13d discharge lubricants.
(other embodiment)
To sum up, embodiments of the present invention are illustrated, but the above embodiment is merely used for implementing this
The example of invention.Therefore, the present invention is not limited to the above embodiments, as long as without departing from the spirit and scope of the invention, energy
It is enough that the above embodiment is suitably deformed and is implemented.
In embodiments, when plunger pressure head 12 draws back limit movement from the advance limit, in the axis of plunger pressure head 12
In the case of being the 1st position to the 3rd position to position, lubricant supply unit 15 makes lubricant from upside lubricant drainage port respectively
13c or downside lubricant drainage port 13d discharges.It however, it can be, be only located at the 2nd in the axial position of plunger pressure head 12
In the case of setting with the 3rd position, lubricant supply unit 15 makes lubricant be arranged from upside lubricant drainage port 13c or downside lubricant
Export 13d discharges.
That is, can also be, plunger pressure head 12 be located at the advance limit of molten metal access 11a with when plunger pressure head 12 from
Retreat the limit march forward the limit movement when plunger pressure head 12 the speed switching position that switches over of movement speed between position
In the case of (the 1st position), lubricant supply unit 15 does not make lubricant be discharged from downside lubricant drainage port 13d.
As long as also, plunger pressure head 12 contacts a point position with the inner surface of plunger guide bush 11, then the position of lubricant is discharged
Set the position (the 1st position to the 3rd position) for being not limited to embodiment.In addition, as long as plunger pressure head 12 and plunger bushing can be directed to
Lubricant is discharged in the part of the inner surface contact of cylinder 11, then can be discharged from upside lubricant drainage port 13c and downside lubricant
Lubricant is discharged in either side in mouth 13d.
In addition it is also possible to be, when lubricant is discharged to the inner surface of plunger guide bush 11, not only to be arranged from upside lubricant
It exports the side in 13c and downside lubricant drainage port 13d and lubricant is discharged, but from upside lubricant drainage port 13c under
Lubricant is discharged in the both sides of side lubricant drainage port 13d.That is, can also there are multiple lubricant drainage ports, from
Lubricant is discharged simultaneously in the lubricant drainage port of whole lubricant drainage ports or a part.
In embodiments, lubricant drainage port is directed towards the upside lubricant drainage port 13c of upper opening and under
The downside lubricant drainage port 13d being just open.But as long as plunger pressure head 12 can be contacted with the inner surface of plunger guide bush 11
Part be discharged lubricant, then the outlet of lubricant can be open towards any direction.Also, lubricant drainage port is not limited to
2, can also be 1, can also be more than two.Even if in this case, it is also preferred that each lubricant drainage port is in plunger guide bush
Different location opening in the circumferential direction of 11 peripheral surface.
In embodiments, plunger rod 13 has upside lubricant drainage port 13c and downside lubricant drainage port 13d.But
It is that can also lubricant drainage port be set on plunger pressure head.For example, as shown in figure 11, it can also be via pressure head connector 102
Lubricant drainage port 101c is set on the plunger pressure head 101 being connect with plunger rod 13.
Specifically, as shown in figure 11, plunger pressure head 101 has the pressure head portion 101a and lubricant discharge unit of end side
101b.Lubricant discharge unit 101b has the multiple lubricant drainage port 101c arranged in the circumferential.Pressure head connector 102 is in inside
With a plurality of lubricant flow path 102a, the 102b being connected with multiple lubricant drainage port 101c.A plurality of lubricant flow path 102a,
102b is connected with lubricant flow path 13a, 13b in plunger rod 13 respectively.
It is supplied to the lubricant stream of a lubricant flow path in lubricant flow path 13a, 13b in plunger rod 13 as a result,
Cross the lubricant from plunger pressure head 101 in a lubricant flow path in lubricant flow path 102a, 102b in pressure head connector 102
The lubricant drainage port 101c discharges of discharge unit 101b.
As described above, lubricant drainage port 101c is arranged by the lubricant discharge unit 101b in plunger pressure head 101, even if
When abrasion has occurred in the pressure head portion 101a of plunger pressure head 101, the shadow of abrasion for the head 101a that can not also be pressurized etc.
It rings, and is in due course from lubricant drainage port 101c and suitable lubricant is discharged.
Alternatively, it is also possible to which lubricant drainage port is arranged in the both sides of plunger rod and plunger pressure head.That is, can also be in embodiment party
It is constituted shown in constitutional diagram 11 in the composition of formula.
In embodiments, plunger rod 13 has 2 lubricant flow paths 13a, 13b in inside.But it is also possible in plunger
The inside of bar 13 has the lubricant flow path more than 2.
In embodiments, as the upside lubricant drainage port 13c and downside lubricant drainage port 13d from plunger rod 13
An example of the lubricant of discharge, has used lubricating oil.But then can also be lubricating oil as long as being acted on as lubricant plays
Other lubricants in addition.
In embodiments, lubricant supply unit 15 has 3 pumps 61.But pump can be less than 3, can also be more than 3
Platform.Also, in embodiments, 3 pumps 61 correspond to the dedicated pump of each discharge of lubricant, and but not limited to this,
The discharge of multiple lubricant can also be carried out using 1 pump.Additionally, it is preferred that the number of units of pump is logical in molten metal with plunger pressure head
The corresponding number of units of number being discharged from lubricant drainage port when drawing back limit movement from the advance limit in road.
【Embodiment】
In order to confirm above-mentioned present embodiment composition effect, to the lubricant of the inner surface for plunger guide bush 11
Coating state is confirmed.The coating method of lubricant uses following methods other than the method for above-mentioned present embodiment
As Comparative Examples 1 and 2.
(comparative example 1)
When plunger pressure head is located at the retrogressing limit of molten metal access, profit is discharged into plunger guide bush 11 together with air
Lubrication prescription, also, plunger pressure head will be arrived under oil droplet.
(comparative example 2)
When plunger pressure head is drawn back from the advance limit when limit moves in molten metal access, (plunger pressure head is being injected into
When returning to the retrogressing limit after type), primary profit is discharged into plunger guide bush 11 together from lubricant drainage port and the air of plunger rod
Lubrication prescription.
In addition, the discharge rate of the lubricant of each method is as shown in table 1.Also, in each method, if the discharge rate of lubricant
For the discharge rate of application conditions 1~3 shown in table 1.
【Table 1】
Also, the length of the plunger guide bush used in evaluating is 1160mm, and the internal diameter of plunger guide bush is 140mm.Therefore, column
The area of the inner surface of plug sleeve is 510000mm2.In any one method, the pressure of the air sprayed together with lubricant
All it is 10MPa.Also, in any one method, the diameter that the outlet of lubricant and air is discharged all is 2.5mm.
Under conditions of above, after lubricant is discharged into plunger guide bush using each method, by standard Japan paper
The inner surface of plunger guide bush is abutted to lubricant is penetrated on the standard Japan paper range (lubricant applying area)
It is measured.Measurement result is shown in table 2.
【Table 2】
| Comparative example 1 | Comparative example 2 | Present embodiment | |
| Application conditions 1 | 331.500mm2 | 357.000mm2 | 438.600mm2 |
| Application conditions 2 | 260.100mm2 | 265.200mm2 | 372.300mm2 |
| Application conditions 3 | 198.900mm2 | 249.900mm2 | 346.800mm2 |
According to table 2, under any one application conditions, using present embodiment method when lubricant applying area most
Greatly.Therefore, it is known that, as the method for the inner surface application of lubricating to plunger guide bush, in 3 kinds of coating methods, this embodiment party
The method of formula is most efficient method.
Also, according to table 2, it is known that, the lubricant applying area when application conditions 3 of present embodiment and Comparative Examples 1 and 2
Application conditions 1 when lubricant applying area equation.Therefore, coating method according to the present embodiment, with Comparative Examples 1 and 2
The case where method, is compared, and the discharge rate of the lubricant into plunger guide bush can be reduced.
Next, in above-mentioned 3 kinds of coating methods, become under the same conditions (in each coating in lubricant applying area
Become the condition of the area of the underscore in table 2 in method) to the inner surface application of lubricating of plunger guide bush, utilize die casting equipment
Obtain casting piece (molded part).Then, the gas flow contained by the casting piece is measured.In addition, the measurement of gas flow
The gas-chromatography formula gas analyzing apparatus for having used NINZINGER companies to manufacture.
The measurement result of the gas flow contained by casting piece is shown in FIG. 12.As shown in figure 12, present embodiment is utilized
Method by the inner surface of lubricant applying to plunger guide bush in the case of, compared with the method for Comparative Examples 1 and 2, institute in casting piece
The gas flow (the especially gas flow caused by lubricant) contained is less.This is considered as because using this embodiment party
In the case of the method for formula, compared with the method for Comparative Examples 1 and 2, the discharge rate of lubricant can be reduced.
According to result above, by using the injection piston device and lubricant supplying method of present embodiment, Neng Gou
Ensure to inhibit influence of the lubricant to molded part while lubricity of the plunger guide bush with plunger pressure head.
The present invention can utilize in the injection piston device for injecting molten metal into the mold of such as die casting equipment.
Claims (17)
1. a kind of injection piston device has for the supplying melting metal into the mold of die casting equipment：
The plunger guide bush of tubular；
Columned plunger pressure head, is configured in the plunger guide bush；
The plunger rod of shaft-like is connected with the plunger pressure head at its end；And
Lubricant supply unit supplies lubricant between the plunger guide bush and the plunger pressure head,
The plunger guide bush has：
Molten metal access, the molten metal are supplied to the molten metal access；And
Injection port is located at the one end of the molten metal access, is open towards the inner space of the mold,
The plunger pressure head can be in the molten metal access in the advance limit of the injection port side and melting gold
It is moved back and forth between the retrogressing limit of the another side of category access,
The plunger rod has a plurality of lubricant flow path axially extended in inside,
The injection piston device is characterized in that,
At least one party in the plunger pressure head and the plunger rod has multiple lubricant drainage ports, the multiple lubricant row
The different location opening in the circumferential direction of peripheral surface is exported, and is connected respectively with a plurality of lubricant flow path,
In the plunger pressure head during being moved to the retrogressing limit from the advance limit in the molten metal access,
Axial position of the lubricant supply unit according to the plunger pressure head in the molten metal access, to a plurality of lubrication
At least one lubricant flow path in agent flow path supplies lubricant.
2. injection piston device according to claim 1, which is characterized in that
The plunger rod has the multiple lubricant drainage port in peripheral surface.
3. injection piston device according to claim 1 or 2, which is characterized in that
The multiple lubricant drainage port includes：
Upside lubricant drainage port, towards gravity direction upper opening；And
Downside lubricant drainage port, towards gravity direction lower opening.
4. injection piston device according to claim 1 or 2, which is characterized in that
When the plunger pressure head moves in the molten metal access from the advance limit to the retrogressing limit, in institute
State plunger pressure head when plunger pressure head moves in the molten metal access from the retrogressing limit to the advance limit
At the position contacted with the inner surface of the plunger guide bush, the lubricant supply unit is from the multiple lubricant drainage port
The lubricant drainage port discharge lubrication for the contact portion being in contact with the inner surface of the plunger guide bush close to the plunger pressure head
Agent.
5. injection piston device according to claim 1 or 2, which is characterized in that
The lubricant supply unit has：
Multiple pumps；
Switching part switches over the connection of the multiple pump and a plurality of lubricant flow path；And
Lubricant supply control part controls the driving of the multiple pump and the switching part.
6. injection piston device according to claim 5, which is characterized in that
The multiple number of units for pumping the pump for including is equal to the plunger pressure head in the molten metal access from the advance pole
It limits to the number being discharged from the multiple lubricant drainage port when the retrogressing limit movement,
The lubricant supply control part has：
Switch control portion controls the driving of the switching part；And
Control unit is pumped, the driving of the pump is controlled,
It is each when the plunger pressure head moves in the molten metal access from the advance limit to the retrogressing limit
When lubricant is discharged from the multiple lubricant drainage port, the switch control portion is made by the switching part in the multiple pump
Different pumps connect with a lubricant flow path in a plurality of lubricant flow path,
The pump control unit makes lubricant via a lubricant stream by the pump being connect with a lubricant flow path
The connected lubricant drainage port discharge of the Lu Congyu lubricant flow paths.
7. injection piston device according to claim 3, which is characterized in that
When the plunger pressure head moves in the molten metal access from the advance limit to the retrogressing limit, in institute
State plunger pressure head when plunger pressure head moves in the molten metal access from the retrogressing limit to the advance limit
At the position contacted with the inner surface of the plunger guide bush, the lubricant supply unit is from the multiple lubricant drainage port
The lubricant drainage port discharge lubrication for the contact portion being in contact with the inner surface of the plunger guide bush close to the plunger pressure head
Agent.
8. injection piston device according to claim 3, which is characterized in that
The lubricant supply unit has：
Multiple pumps；
Switching part switches over the connection of the multiple pump and a plurality of lubricant flow path；And
Lubricant supply control part controls the driving of the multiple pump and the switching part.
9. injection piston device according to claim 4, which is characterized in that
The lubricant supply unit has：
Multiple pumps；
Switching part switches over the connection of the multiple pump and a plurality of lubricant flow path；And
Lubricant supply control part controls the driving of the multiple pump and the switching part.
10. injection piston device according to claim 8, which is characterized in that
The multiple number of units for pumping the pump for including is equal to the plunger pressure head in the molten metal access from the advance pole
It limits to the number being discharged from the multiple lubricant drainage port when the retrogressing limit movement,
The lubricant supply control part has：
Switch control portion controls the driving of the switching part；And
Control unit is pumped, the driving of the pump is controlled,
It is each when the plunger pressure head moves in the molten metal access from the advance limit to the retrogressing limit
When lubricant is discharged from the multiple lubricant drainage port, the switch control portion is made using the switching part in the multiple pump
Different pumps connect with a lubricant flow path in a plurality of lubricant flow path,
The pump control unit utilizes the pump being connect with a lubricant flow path to make lubricant via a lubricant stream
The connected lubricant drainage port discharge of the Lu Congyu lubricant flow paths.
11. injection piston device according to claim 9, which is characterized in that
The multiple number of units for pumping the pump for including is equal to the plunger pressure head in the molten metal access from the advance pole
It limits to the number being discharged from the multiple lubricant drainage port when the retrogressing limit movement,
The lubricant supply control part has：
Switch control portion controls the driving of the switching part；And
Control unit is pumped, the driving of the pump is controlled,
It is each when the plunger pressure head moves in the molten metal access from the advance limit to the retrogressing limit
When lubricant is discharged from the multiple lubricant drainage port, the switch control portion is made by the switching part in the multiple pump
Different pumps connect with a lubricant flow path in a plurality of lubricant flow path,
The pump control unit makes lubricant via a lubricant stream by the pump being connect with a lubricant flow path
The connected lubricant drainage port discharge of the Lu Congyu lubricant flow paths.
12. a kind of lubricant supplying method of injection piston device, the injection piston device have：
The plunger guide bush of tubular, with molten metal access；
Columned plunger pressure head is configured in the molten metal access；
The plunger rod of shaft-like is connected with the plunger pressure head at its end；And
Lubricant supply unit supplies lubricant between the plunger guide bush and the plunger pressure head,
The lubricant supplying method is characterized in that, including process is discharged in lubricant,
The lubricant be discharged process in, when the plunger pressure head in the molten metal access from the advance pole of injection port side
Limit draw back the limit movement when, according to axial position of the plunger pressure head in the molten metal access, utilize the profit
Lubrication prescription supply unit, via a plurality of lubricant flow path axially inside extended in the plunger rod, from the plunger pressure head and
Multiple lubricant drainage ports of the different location opening in the circumferential direction of peripheral surface of at least one party in the plunger rod are multiple
Lubricant is discharged.
13. the lubricant supplying method of injection piston device according to claim 12, which is characterized in that
It is discharged in process in the lubricant,
When the plunger pressure head moves in the molten metal access from the retrogressing limit to the advance limit and institute
It states at multiple positions of inner surface contact of plunger guide bush, is arranged respectively from the multiple lubricant using the lubricant supply unit
The lubricant drainage port of the contact portion being in contact with the inner surface of the plunger guide bush close to the plunger pressure head in outlet
Lubricant is discharged.
14. the lubricant supplying method of injection piston device according to claim 13, which is characterized in that
The multiple position includes：
Speed switching position, the speed switching position be in the plunger pressure head in the molten metal access after described
The movement speed for moving back the plunger pressure head when limit is moved to the advance limit is switched to or ratio regulation equal with specified value
It is worth the position of big speed；And
Contact position, the contact position be in the plunger pressure head in the molten metal access from the retrogressing limit to
When the advance limit movement in the plunger pressure head and the plunger guide bush deformed due to the heat of the molten metal
The position of surface contact.
15. the lubricant supplying method of injection piston device according to claim 14, which is characterized in that
The multiple lubricant drainage port includes：
Upside lubricant drainage port, to gravity direction upper opening；And
Downside lubricant drainage port, to gravity direction lower opening,
At the speed switching position, the lubricant drainage port close to the contact portion is the downside lubricant discharge
Mouthful,
At the contact position, the lubricant drainage port close to the contact portion is the upside lubricant drainage port.
16. the lubricant supplying method of the injection piston device according to claims 14 or 15, which is characterized in that
The multiple position includes the position between the speed switching position and the advance limit,
At position between the speed switching position and the advance limit, the lubricant close to the contact portion is discharged
Mouth is the downside lubricant drainage port to gravity direction lower opening in the multiple lubricant drainage port.
17. the lubricant supplying method of injection piston device according to claim 12, which is characterized in that
The multiple lubricant drainage port includes：
Upside lubricant drainage port, towards gravity direction upper opening；And
Downside lubricant drainage port, towards gravity direction lower opening,
The lubricant discharge process includes following processes：
The 1st process is discharged, in the 1st process of the discharge, is located at the advance limit in the plunger pressure head and switches with speed
When 1 position between position, lubricant is discharged from the downside lubricant drainage port in the multiple lubricant drainage port,
Wherein, the speed switching position be in the plunger pressure head in the molten metal access from the retrogressing limit to described
The movement speed of the plunger pressure head is switched to the position of specified value or more when the movement of the advance limit；
The 2nd process is discharged, in the 2nd process of the discharge, is located at as the speed switching position in the plunger pressure head
When 2 position, lubricant is discharged from the downside lubricant drainage port in the multiple lubricant drainage port；And
The 3rd process is discharged, in the 3rd process of the discharge, the plunger pressure head be located at the speed switching position with it is described
When retreating 3 position between the limit, profit is discharged from the upside lubricant drainage port in the multiple lubricant drainage port
Lubrication prescription.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017027627A JP6859737B2 (en) | 2017-02-17 | 2017-02-17 | Lubrication supply method for injection plunger device and injection plunger device |
| JP2017-027627 | 2017-12-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108453233A true CN108453233A (en) | 2018-08-28 |
| CN108453233B CN108453233B (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810151769.1A Active CN108453233B (en) | 2017-02-17 | 2018-02-14 | Injection plunger device and lubricant supply method for injection plunger device |
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| Country | Link |
|---|---|
| JP (1) | JP6859737B2 (en) |
| CN (1) | CN108453233B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113579199A (en) * | 2021-07-21 | 2021-11-02 | 惠州市名博液态模锻有限公司 | Novel method for lubricating punch of liquid die forging machine |
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| CN103648688A (en) * | 2011-06-28 | 2014-03-19 | 库珀罗麦克压铸股份独资公司 | Piston for a die-casting machine |
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| JP2010269319A (en) * | 2009-05-19 | 2010-12-02 | Masashi Katsumi | Die casting device |
| CN103648688A (en) * | 2011-06-28 | 2014-03-19 | 库珀罗麦克压铸股份独资公司 | Piston for a die-casting machine |
| CN102974796A (en) * | 2012-10-24 | 2013-03-20 | 华中科技大学 | Pressure chamber lubrication method and device of die-casting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113579199A (en) * | 2021-07-21 | 2021-11-02 | 惠州市名博液态模锻有限公司 | Novel method for lubricating punch of liquid die forging machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6859737B2 (en) | 2021-04-14 |
| CN108453233B (en) | 2021-02-02 |
| JP2018130752A (en) | 2018-08-23 |
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