CN104870122A - Method for operating hot chamber die casting machine - Google Patents
Method for operating hot chamber die casting machine Download PDFInfo
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- CN104870122A CN104870122A CN201280075351.8A CN201280075351A CN104870122A CN 104870122 A CN104870122 A CN 104870122A CN 201280075351 A CN201280075351 A CN 201280075351A CN 104870122 A CN104870122 A CN 104870122A
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- injection
- injection plunger
- injection molding
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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
- B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
- B22D17/04—Plunger machines
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Abstract
The present invention is a method for operating a hot chamber die casting machine that, in addition to not generating blow holes in the injection molding, is capable of injection molding in a short time and has excellent durability and with which the size of the space can be set freely. The method is configured so that: injection molding is performed by moving an injection plunger (7) to an injection completion position; the injection plunger (7) is then moved to a molten metal supply position and after waiting for a set period at the molten metal supply position, is moved to a set position to form a continuous space (10) between a nozzle (8) and a molten metal path (6); subsequently, the injection plunger (7) is moved to a filling completion position to fill molten metal in the space (10); after opening the mold (9) and removing the injection molding (11), the injection plunger (7) is moved to the injection molding start position to form a space (10) of a set size; and the mold is closed in this state and the injection plunger (7) is moved to the injection completion position.
Description
Technical field
The present invention relates to a kind of method of operating of hot chamber machine.
Background technology
In the past, as hot chamber machine, as we all know there are the hot chamber machine shown in Figure 10.
That is, in the molten metal 2 of the fusion pot (melting pot) 1 being referred to as tank or crucible etc. being placed with molten metal, movable elbow (gooseneck) 3 is set, this movable elbow 3 comprises the injection room 5 that be communicated with interior with fusion pot 1 with supply opening 4, and the fluid passage (runner) 6 be communicated with this injection room 5.
In above-mentioned injection room 5, moving up and down intercalation freely injection plunger 7, moving up and down and the above-mentioned supply opening 4 of opening and closing in not shown injection cylinder by making this injection plunger 7.
The leading section 6a of above-mentioned fluid passage 6 is positioned at the upper surface than above-mentioned molten metal 2, that is jar liquid surface 2a locates by the top, arranges nozzle 8 at the leading section 6a of this fluid passage 6.
This nozzle 8 is connected with the die cavity 9a of mould 9.Fixed mould 9b and moveable die 9c utilizes not shown matched moulds (mold closing) mechanism to carry out mold closing, die sinking by this mould 9.
Above-mentioned hot chamber machine carries out action as follows.
Under the state shown in Figure 10, mould 9 is closed, and in the feed flow position on top and injection plunger 7 open feed liquid mouth 4, molten metal 2 is supplied to the feed flow position of injection room 5, the liquid level 2b of the molten metal 2 in fluid passage 6 and jar liquid surface 2a is sustained height.
Move downwards from the state shown in Figure 10 by making injection plunger 7, and close supply opening 4, and by moving downwards further, and the molten metal 2 penetrated in room 5 is pressurizeed, and via fluid passage 6, nozzle 8 and injection to (injection step) in the die cavity 9a of mould 9.
The state that injection terminates is Figure 11, and injection plunger 7 is in the injection end position of bottom.
Injection plunger 7 is moved upward from the injection done state shown in Figure 11, and carry out recovery action, penetrate in room 5 thus and become negative pressure, utilize the pressure caused by the difference in height of the front end of nozzle 8 front end and injection plunger 7 that molten metal 2 is moved up in the lump together with injection plunger 7, thus as shown in figure 12, mould 9 is cut off with the molten metal 2 of nozzle 8 front end, becomes the space 10 that there is not molten metal 2 in nozzle 8 with the fore-end of fluid passage 6.Injection molding product 11 in the die cavity 9a of mould 9 are cooled.
If injection plunger 7 is moved upward further from the state shown in Figure 12, and be set to above-mentioned feed flow position as shown in figure 13, then supply opening 4 is opened, be negative pressure in above-mentioned space 10, thus the molten metal 2 liquid self-feeding mouth 4 in fusion pot 1 flows into (feed flow) gradually in injection room 5, the liquid level 2b of the molten metal 2 in fluid passage 6 rises gradually, and above-mentioned space 10 reduces gradually.
Then, if through official hour, as shown in figure 14, till molten metal 2 is filled to nozzle 8, above-mentioned space 10 disappears.In this condition, the pressure for forcing down than air in nozzle 8.
From the state shown in above-mentioned Figure 14, make the moveable die 9c of mould 9 move and die sinking as shown in figure 15, thus take out the injection molding product 11 in die cavity 9a.
Thus, because being communicated with air in nozzle 8, therefore due to nozzle 8 and the difference of height of jar liquid surface 2a, the molten metal 2 liquid self-feeding mouth 4 penetrated in room 5 flows out in fusion pot 1 gradually, if through official hour, as shown in figure 16, liquid level 2b in fluid passage 6 and jar liquid surface 2a is sustained height, and above-mentioned space 10 increases.
From this state, make moveable die 9c contact fixed mould 9b and mold closing, the state that matched moulds terminates is the state shown in above-mentioned Figure 10.
Utilize existing hot chamber machine and be above-mentioned by the method for operating of injection molding product injection molding, thus under the state terminated at matched moulds as shown in Figure 10, there is the large space 10 be connected with leading section and the nozzle 8 of fluid passage 6, if make injection plunger 7 move at high speed from matched moulds done state as shown in Figure 10 and carry out injection action downwards, pore (blow hole) is produced at injection molding product in the die cavity 9a that air then in this space 10 enters to mould 9, thus the quality of injection molding product reduces, thus injection plunger 7 is made to move lentamente from the matched moulds done state shown in Figure 10 downwards, to make to produce pore because of the air in space 10 at injection molding product.
Therefore, in above-mentioned existing method of operating, the time lengthening needed for injection molding.
Disclose the method for operating of following hot chamber machine in patent document 1, it solves the problem, and can not produce pore, and can shorten the time needed for injection molding at injection molding product.
That is, the metal sensor detecting molten metal is set at nozzle, this metal sensor is utilized to detect the amount (liquid level) of the molten metal in nozzle, it can thus be appreciated that know the size in above-mentioned space, and the amount of setting is become by the molten metal in nozzle, and can detect that this space becomes the size of setting.
And, above-mentioned method of operating is as follows: the state opened at mould (such as, the state of above-mentioned Figure 15, Figure 16) under, injection plunger is moved downwards lentamente and the molten metal that injection is indoor is delivered to fluid passage, nozzle, after molten metal in nozzle becomes the amount of setting, injection plunger is stopped detecting, by mould close, then make injection plunger move at high speed downwards, mould indoor injection molten metal thus carry out injection molding.
If this method of operating, space then in nozzle is after the size of setting, injection plunger moved downwards at high speed and carries out injection molding, thus can not produce in injection molding product and be mixed into by air and the pore caused, and the time needed for injection molding can be shortened.
Prior art document
Patent document
[patent document 1] Japanese Patent Laid-Open 2003-53507 publication
Summary of the invention
The problem that invention will solve
Above-mentioned existing method of operating detects molten metal because utilizing metal sensor, therefore this metal sensor is owing to contacting with the molten metal of high temperature, and durability has problems.
And, liquation based on metal sensor detects and detects the amount of the molten metal in nozzle, make the size in space be the size of setting thus, thus the size in space restricted by the setting position of metal sensor, thus cannot the size of freely setting space.
The object of the present invention is to provide a kind of method of operating of hot chamber machine, it can not produce and is mixed into by air and the pore caused in injection molding product, and can shorten the time needed for injection molding, and excellent in te pins of durability, can the size of freely setting space.
The technological means of dealing with problems
The present invention is a kind of method of operating of hot chamber machine, by the injection plunger 7 of movable elbow 3 is moved up and down, and the molten metal 2 in fusion pot 1 is penetrated in the die cavity 9a of mould 9 via oil-feed port 4, injection room 5, fluid passage 6, nozzle 8, thus by injection molding product 11 injection molding, the feature of the method for operating of above-mentioned hot chamber machine is to comprise:
1st step, under the state of being closed by above-mentioned mould 9, make injection plunger 7 till injection molding starting position moves to the injection end position of bottom downwards, after the molten metal injection in injection room 5 is to the die cavity 9a of mould 9, make injection plunger 7 be moved upward to the feed flow position of the top, this feed flow position is the position of the supply opening 4 of the above-mentioned injection room 5 of open communication and fusion pot 1;
2nd step, makes above-mentioned injection plunger 7 after the standby setting-up time in above-mentioned feed flow position, move to downwards than above-mentioned feed flow position on the lower place and close supply opening 4 desired location till, thus nozzle side part formed space 10;
3rd step, under the state that the die cavity 9a of mould 9 exists injection molding product 11, make above-mentioned injection plunger 7 move to than above-mentioned desired location place and till end-of-fill position on the lower downwards from above-mentioned desired location, this end-of-fill position is installations with molten metal and eliminate the position in space 10 in above-mentioned space 10;
4th step, above-mentioned injection plunger 7 is made to be moved upward to than place and until injection molding starting position by the top, this end-of-fill position from end-of-fill position, this injection molding starting position is the position closing above-mentioned oil-feed port 4, thus forms setting space 10 in nozzle side part; And
5th step, after above-mentioned mould 9 takes out injection molding product 11, closes mould 9.
In the present invention, can be the method for operating of following hot chamber machine, that is, in above-mentioned 3rd step, injection plunger 7 to be moved downwards and to installations with molten metal in space 10 from desired location, and injection plunger 7 stops in end-of-fill position thus,
In above-mentioned 4th step, injection plunger 7 is moved upward with set stroke from end-of-fill position, thus is set to injection molding starting position.
Accordingly, can make the size in space 10 become with injection plunger 7 from end-of-fill position to penetrating the size forming the setting stroke starting position and conform to, and change the size in space 10 by changing this setting stroke.
In the present invention, can be the method for operating of following hot chamber machine, namely, the stroke detection means 30 of the mobile stroke of the above-mentioned injection plunger 7 of detection is utilized to detect injection plunger 7 moves to top stroke from end-of-fill position, when the stroke that this detects is the stroke of setting, injection plunger 7 is made to stop and being set to injection molding starting position.
Accordingly, precision injection plunger 7 can be set to injection molding starting position excellently.
In the present invention, can be the method for operating of following hot chamber machine, namely, the desired location of above-mentioned injection plunger 7 is, the mobile stroke of the injection plunger 7 detected based on stroke detection means 30 detects the position of this injection plunger 7, to move to control and as the desired location of injection plunger 7 according to this position detected to injection plunger 7.
Accordingly, can precision make injection plunger 7 stop at desired location excellently.
In the present invention, can be the method for operating of following hot chamber machine, namely, in above-mentioned 3rd step, the end-of-fill position of injection plunger 7 is set as target location, when the target location of this setting is different from actual end-of-fill position, revise end-of-fill position when upper injection molding action once by the stand-by time increased and decreased in the 2nd step.
Accordingly, when by repeat repeatedly injection molding action and end-of-fill position changes, can be target location by this end-of-fill position correction.
In the present invention, can be the method for operating of following hot chamber machine, that is, make above-mentioned injection plunger 7 from end-of-fill position move to prevent salivation position till and nozzle side part formed space 10, then mould 9 is opened.
Accordingly, when being opened by mould 9, molten metal can not flow down from nozzle 8.
In the present invention, can be the method for operating of following hot chamber machine, that is, the size being formed at the space 10 of nozzle side part in above-mentioned 2nd step is set to the size that molten metal in nozzle 8 and mould 9 separate.
Accordingly, the molten metal in nozzle 8 not easily cools because of the cooling of mould 9.
In the present invention, can be the method for operating of following hot chamber machine, that is, the liquid entrance 9d of the fixed mould 9b of above-mentioned mould 9 contacts with nozzle 8 always, moveable die 9c is moved and mold closing, die sinking.
Accordingly, because fixed mould 9b does not move, therefore its liquid entrance 9d can not repeat to connect or leave with nozzle 8, thus can not between the liquid entrance 9d of fixed mould 9b and nozzle 8, produce gap and molten metal be spilt.
In the present invention, can be the method for operating of following hot chamber machine, that is, after carrying out repeatedly injection molding action, change the desired location of above-mentioned injection plunger 7.
Accordingly, injection plunger 7 can be made to move throughout the whole region of injection room 5, thus effectively can utilize the whole region of this injection room 5.
The effect of invention
According to the present invention, space 10 when injection molding starts is the size of setting, even if till making injection plunger 7 move to injection end position at high speed, also can not produce in injection molding product and be mixed into by air the pore caused, and the time needed for injection molding can be shortened.
Further, only control is moved to injection plunger 7, and do not use the sensor of the impact of the molten metal that can be subject to high temperature, thus excellent in te pins of durability.
And then, by changing the injection molding starting position of injection plunger 7, and can the size of freely setting space 10.
Accompanying drawing explanation
Fig. 1 is the key diagram of the 1st injection molding action of the present invention when starting.
Key diagram during Fig. 2 to be injection plunger of the present invention be injection end position.
Fig. 3 key diagram that to be injection plunger of the present invention be when recovering midway.
The key diagram that Fig. 4 is injection plunger of the present invention when being feed flow position.
Fig. 5 key diagram that to be injection plunger of the present invention be when closing the desired location of supply opening.
The key diagram that Fig. 6 is injection plunger of the present invention when being end-of-fill position.
Fig. 7 is that injection plunger of the present invention is for preventing key diagram when salivating (drooling) position.
The key diagram that Fig. 8 is injection plunger of the present invention when being injection molding starting position.
Fig. 9 is by key diagram during mould closedown of the present invention.
Figure 10 is the key diagram at the end of existing matched moulds.
The key diagram that Figure 11 is existing injection plunger when being injection molding end position.
Figure 12 key diagram that to be existing injection plunger be when recovering midway.
The key diagram that Figure 13 is existing injection plunger when being feed flow position.
Figure 14 is the key diagram at the end of existing feed flow.
Figure 15 is the key diagram started by existing mould when opening.
Figure 16 is the key diagram at the end of opening of existing mold.
Detailed description of the invention
Hot chamber machine of the present invention as shown in Figure 1, comprise fusion pot 1, movable elbow 3, nozzle 8 and mould 9 in the same manner as the existing hot chamber machine before shown in Figure 10, and comprise the injection cylinder 20 moved up and down for this injection plunger 7 and the means 30 that the mobile stroke of injection plunger 7 is detected.In hot chamber machine, the movable elbow 3 as injection part is immersed in the molten metal 2 of fusion pot 1, by the metal of the melting press-in such as (such as, zinc, aluminium, magnesium, copper alloy) in mould 9.
Above-mentioned injection cylinder 20 carries out elongation start according to the instruction carrying out self-controller 40, shrinks start and stop.Such as, the fluid pressure of the fluid potential source 21 of air or oil be supplied to by transfer valve 22 and extend room 23, discharge chambe 24, carry out elongations start thus, compress start, this valve 22 is switched according to the instruction carrying out self-controller 40.
If this injection cylinder 20 carries out elongation start, injection plunger 7 moves downwards, is then moved upward by carrying out compression start.
In above-mentioned stroke detection means 30, utilize the sensor such as using laser, the stroke value detected delivers to controller 40.
Above-mentioned injection plunger 7 moves up and down as aftermentioned, but in order to so control the translational speed of injection plunger 7, and increase and decrease the quantity delivered of the time per unit of fluid potential source 21, or choke valve is set on fluid potential source 21 with the connecting circuit of injection cylinder 20, or change the aperture area of valve 22, increase and decrease the amount that time per unit is supplied to the injection elongation room 23 of cylinder 20, the fluid pressure of discharge chambe 24 thus.
Secondly, an example of method of operating of the present invention is described.
When initial injection molding action after long-term stopping or after die change starts, that is when the 1st injection molding action starts, become the state shown in Fig. 1.
That is, mould 9 is closed, molten metal in the fluid passage 6 of movable elbow 3 is the height till the midway of arrival fluid passage 6, its liquid level 2b and jar liquid surface 2a is sustained height, in nozzle 8, or the space 10 being connected with the fore-end of fluid passage 6 in nozzle 8 and being formed, that is the size in the space 10 being formed at nozzle side part is identical with the state shown in Figure 10 before.
1st injection molding action is as follows.
From time injection molding action initial state of the 1st shown in Fig. 1, injection cylinder 20 is made to carry out elongation action, injection plunger 7 is moved downwards and the molten metal in injection room 5 is penetrated in the die cavity 9a of mould 9, injection plunger 7 is in the injection end position shown in Fig. 2, and be shaped injection formed products 11 thus.
The injection end position of the injection plunger 7 during injection done state shown in Fig. 2, according to injection plunger 7 by exerting oneself (the elongation thrust of injection cylinder 20) and the volume of the die cavity 9a of mould 9 and determine.
That is, if with authorized pressure to installations with molten metal 2 in the die cavity 9a of mould 9, then injection plunger 7 can not move downwards again, and the feed flow position on the top when injection molding action of injection plunger 7 starts as shown in Figure 1 always identical (such as, top dead-centre), thus as above decide the injection end position of injection plunger 7.
Recovery action after injection terminates is as follows.
Injection cylinder 20 is made to carry out compression start from above-mentioned injection done state, injection plunger 7 is made to be moved upward and to carry out recovery action, and as shown in Figure 3, the molten metal of nozzle 8 front end and mould 9 are cut off, the liquid level 2b of the molten metal in fluid passage 6 declines gradually, thus produces the space 10 of negative pressure in nozzle side part.
And then, make injection plunger 7 be moved upward and be set to the feed flow position shown in Fig. 4.
Above-mentioned action is the 1st step.
If above-mentioned injection plunger 7 is moved upward to the feed flow position (top dead-centre) shown in Fig. 4, then supply opening 4 is open, utilize this supply opening 4 and penetrate in room 5 and fusion pot 1 and be communicated with, molten metal 2 liquid self-feeding mouth 4 in fusion pot 1 is supplied in injection room 5, and the liquid level 2b in fluid passage 6 passes through in time and rises gradually.That is, become for liquid status.
Make above-mentioned injection plunger 7 at the standby setting-up time in feed flow position, to make to form space 10 in said nozzle side part.That is, if long-time standby in feed flow position, in space 10, be filled with molten metal.
And, after setting-up time, make injection plunger 7 again mobile downwards and as shown in Figure 5, stop at the desired location of closing supply opening 4.
This desired location is the part more top than the injection end position shown in Fig. 2.
Above-mentioned action is the 2nd step forming space 10 in nozzle side part.
Thus, in injection room 5, no longer supply the molten metal 2 in fusion pot 1, thus form space 10 in nozzle side part.
That is, liquid status is supplied for a long time if above-mentioned, till then molten metal being filled in nozzle 8, nozzle side part does not form space 10, the amount of the molten metal of nozzle side part (with the fore-end of fluid passage 6 in nozzle 8) is filled to by controlling time of this confession liquid status and adjustable, thus by the time (that is, the time standby in feed flow position by injection plunger 7) for liquid status is set to setting-up time, and space 10 is formed in nozzle side part.
Such as, according in the liquid measure being supplied to the time per unit in injection room 5 for liquid self-feeding mouth 4 during liquid status, with the volume of fluid passage 6, the volume of nozzle 8, and the size in the space 10 of time per unit change can be calculated.
And, injection plunger 7 move to the feed flow position shown in Fig. 4 and liquid self-feeding mouth 4 starts that the feed flow of feed flow starts in injection room 5 time the size in space 10, can according to the computing from the mobile stroke of injection end position to feed flow position of the volume of the volume of the volume of injection room 5, fluid passage 6, nozzle 8, injection plunger 7.
Therefore, the size in the space 10 that the size in the space 10 when starting according to feed flow and time per unit change, and can calculate can be formed space 10 for the time standby under liquid status, the time this calculated inputs to controller 40, through the time of above-mentioned input after becoming the confession liquid status shown in Fig. 4, then controller 40 pairs of valves 22 switch and make injection cylinder 20 carry out elongation action, thus make injection plunger 7 start move and be set to desired location downwards.
As shown in Figure 5, the molten metal be preferably in nozzle 8 is the state do not contacted with the injection molding product 11 in mould 9, such as die cavity 9a to the size in above-mentioned space 10.
Accordingly, the molten metal in nozzle 8 not easily cools because of the heat of cooling in order to be cooled by the injection molding product 11 in the die cavity 9a of mould 9, thus easily carries out injection molding action described later.
The action that above-mentioned injection plunger 7 is stopped at above-mentioned desired location (injection plunger 7 shown in Fig. 5 closes the position of supply opening 4) can be carried out as following.
Above-mentioned desired location presets with the feed flow position shown in Fig. 4 for benchmark and inputs to controller 40.
The mobile stroke utilizing above-mentioned stroke detection means 30 to detect injection plunger 7 liquid self-feeding position to start, and the stroke utilizing this to detect is to obtain the position of injection plunger 7.
After the position of this injection plunger 7 is consistent with desired location, valve 22 is set to neutral position and injection cylinder 20 is stopped, and injection plunger 7 is set to the desired location shown in Fig. 5.
Such as, preset feed flow position and the desired location of above-mentioned injection plunger 7, obtained the difference (difference of height) of the position of this feed flow position and desired location by computing or actual measurement, and input to controller 40.
Stroke detection means 30 is utilized to detect the mobile stroke of this injection plunger 7 liquid self-feeding position movement downwards, be that valve 22 is set to neutral position by the difference Time Controller 40 of above-mentioned position when this moves stroke, and injection cylinder 20 is stopped, making injection plunger 7 stop at desired location thus.
In addition, the mobile stroke of injection plunger 7 can according to the stroke of injection cylinder 20, that is supply fluid pressure flow and detect, thus the quantity delivered of time per unit is set to fixing, and time valve 22 being set to fluid pressure supply position is controlled, injection plunger 7 can be set to desired location thus.
As above, at injection plunger 7 after desired location stops, installations with molten metal in above-mentioned space 10.
This action is as follows.
Make above-mentioned injection cylinder 20 carry out elongation action and injection plunger 7 is moved downwards, the molten metal in injection room 5 is delivered in above-mentioned space 10 gradually and is also filled.
If be filled with molten metal in above-mentioned space 10, then after, molten metal is pressurized and end-of-fill position that injection plunger 7 is shown in Fig. 6 stops.This action is the 3rd step.
When carrying out above-mentioned action, because there are injection molding product 11 in the die cavity 9a of mould 9, therefore molten metal can not penetrate in the die cavity 9a of mould 9.
Detect the end-of-fill position of above-mentioned injection plunger 7, and input to controller 40.
Such as, utilize the mobile stroke of above-mentioned stroke detection means 30 pairs of injection plungers 7 till desired location moves and stops to detect downwards, detect end-of-fill position with above-mentioned desired location for benchmark according to this mobile stroke detected.
If the end-of-fill position of above-mentioned injection plunger 7 is different from target location, then cannot implement correct injection molding action, thus can confirm whether end-of-fill position is target location.
Such as, the size in the space 10 during desired location according to Fig. 5 of the end-of-fill position of above-mentioned injection plunger 7 decides, if space 10 is the size conformed to target end-of-fill position, then actual end-of-fill position and target end-of-fill position consistency, if and the size in space 10 and above-mentionedly to vary in size, then actual end-of-fill position is different from target end-of-fill position.
That is, because of injection plunger 7 Fig. 5 shown in desired location be fixing always, therefore when the size in space 10 is greater than the size conformed to target end-of-fill position, the mobile stroke downwards of injection plunger 7 is elongated, end-of-fill position is than portion on the lower, target location, and when the size in space 10 is less than the size conformed to target end-of-fill position, the mobile stroke downwards of injection plunger 7 is short, portion more top than target location, end-of-fill position.
Be conceived to this situation, utilize computing or actual measurement to obtain the size in space 10 for end-of-fill position during target sizes, and this position is inputed to controller 40 as target location.
Compared in this target location and the end-of-fill position detected, if identical, end-of-fill position is target location, if difference, end-of-fill position is different from target location.
And, when end-of-fill position is not target location, when upper injection molding action once, for the standby time under liquid status controls, end-of-fill position is set to target location to above-mentioned.
Such as, the volume of based target position and the difference of end-of-fill position detected and the per unit stroke of injection plunger 7 calculates the error of the molten metal being filled in space 10, and the time (feed flow time) of feed flow operating state is increased and decreased with this margin of error, revise end-of-fill position thus.
Can till above-mentioned injection plunger 7 moves to end-of-fill position after, mould 9 is opened, if but open mould 9 under the state being filled with molten metal as shown in Figure 6 in nozzle 8, then there will be referred to as salivation phenomenon that is nozzle 8 in molten metal flow down, thus enforcement prevent salivation (drooling) action after mould 9 is opened.
That is be laterally as shown in Figure 6 in nozzle 8, the liquid entrance 9d of fixed mould 9b is also that laterally if opened by mould 9 under the state being thus filled with molten metal in nozzle 8, then molten metal can be flowed down by the liquid entrance 9d of fixed mould 9b sometimes.
Above-mentioned prevent salivation (drooling) action be as follows.
Above-mentioned injection plunger 7 is moved upward with several mm from the end-of-fill position shown in Fig. 6, thus be set to shown in Fig. 7 preventing salivate (drooling) position.
Thus, space 10 in injection room 5 is negative pressure, molten metal is got back in injection room 5, and as shown in Figure 7, space 10 is formed in nozzle side part, make the liquid level 2b of the molten metal in nozzle 8 be in the position lower than the lower rim of the outlet of nozzle 8 or same position, even if opened by mould 9, the molten metal in nozzle 8 also can not flow in the liquid entrance 9d of fixed mould 9.
Such as, utilize stroke detection means 30 to detect the mobile stroke upward from end-of-fill position of injection plunger 7, when the stroke that this detects is consistent with the lift stroke (setting stroke) of the several mm preset, injection plunger 7 is stopped.
This lift stroke determines according to the amount of movement of the molten metal of the size in above-mentioned space 10 and the per unit stroke of injection plunger 7.
Above-mentioned prevent salivation (drooling) release after, carry out the die sinking action of mould 9, and as shown in Figure 8, fixed mould 9b separated with moveable die 9c and makes that nozzle 8 is interior to be communicated with air.
The state keeping the liquid entrance 9d of the fixed mould 9b of above-mentioned mould 9 to contact with nozzle 8 and moveable die 9c is moved and carries out mold closing, die sinking, thus fixed mould 9b does not move, thus this liquid entrance 9d can not repeat to connect or leave with nozzle 8, thus can not between liquid entrance 9d and nozzle 8, produce gap and molten metal be spilt.
Carry out the size set action in space 10 in the above-described state.
The size set action in this space 10 is as follows.
Above-mentioned injection plunger 7 move to prevent salivation (drooling) position till after, this injection plunger 7 is moved upward, after the liquid level 2b of nozzle side part is reduced gradually, increases the size in space 10 gradually.
Size in this space 10 is after the size of setting, injection plunger 7 is stopped, and forms the space 10 of the size of setting as shown in Figure 8 in nozzle side part.
This action is the 4th step.
As above the position that injection plunger 7 stops is injection molding starting position, this injection molding starting position is preset for benchmark with end-of-fill position, obtain the position of injection plunger 7 with the stroke detected by stroke detection means 30, be in the injection molding starting position of setting in the position of this injection plunger 7 after, injection plunger 7 is stopped.
That is, cause is with the size deciding space 10 from end-of-fill position (preventing from salivating (drooling) position) mobile stroke upward of injection plunger 7, therefore based on the size of the setting in this space 10 and the variable quantity of the molten metal determined by the unit displacement of injection plunger 7, carry out computing and obtain injection plunger 7 from end-of-fill position or prevent salivation (drooling) position mobile stroke upward, and this stroke is inputed to controller 40.
And, when the stroke detected by stroke detection means 30 is consistent with the stroke of above-mentioned setting, valve 22 is switched to neutral position by controller 40, injection plunger 7 is set to the injection molding starting position shown in Fig. 8 by making injection cylinder 20 stop, and the size in the space 10 of nozzle side part is set to the size of setting.
The action that this injection plunger 7 is stopped in injection molding starting position also can control according to the time of mobile injection plunger 7.
Such as, switched to by valve 22 fluid to press time of supply position to be set to injection plunger 7 from the time needed for end-of-fill position (preventing from salivating (drooling) position) movement to injection molding starting position, after this time, valve 22 is set to neutral position.
Take out injection molding product 11 when carrying out above-mentioned action from mould 9, and as shown in Figure 9 mould 9 is closed.
This action is the 5th step.
Carrying out after above-mentioned mold closing and matched moulds terminate, making injection plunger 7 to move at a high speed downwards, and being set to injection end position as shown in Figure 2, the 2nd injection molding release thus.
When as above carrying out injection molding action, when failing fully to cool injection molding product 11, prolongation starts the time to the taking-up of injection molding product, can fully cool injection molding product 11 thus from injection molding in the stopping of arbitrary position to make injection plunger 7.
And the action of the size of setting space 10 can be implemented before being opened by above-mentioned mould 9.
Such as, after till plunger 7 moves to end-of-fill position as shown in Figure 6, carry out the action of the size setting above-mentioned space 10.
And, then die sinking and take out injection molding product 11.
Then, repeat the action shown in Fig. 3 ~ Fig. 9, Fig. 2 and implement the 3rd later injection molding action.
Now, when upper once injection molding action end-of-fill position and target location inconsistent, the time (making injection plunger 7 time standby in feed flow position) for liquid status shown in Fig. 4 is controlled, and is set to target end-of-fill position.
So injection molding action is repeated repeatedly, change the desired location of injection plunger 7.
Accordingly, injection plunger 7 moves throughout the whole region penetrating room 5, thus effectively can utilize whole region in injection room 5.
In the above description, the aperture area of the supply opening 4 when injection plunger 7 is feed flow position is set to fixing, but the also aperture area of this supply opening 4 of adjustable, and increase and decrease is by the flow of the molten metal 2 liquid self-feeding mouth 4 in fusion pot 1 to time per unit supply in injection room 5.
Such as, supply opening 4 is set to circle or Long Circle or shape of slit, feed flow position is set to, by the aperture area of the position and adjustable supply opening 4 of changing the lower surface of this injection plunger 7 up and down in the middle of the above-below direction making the lower surface of injection plunger 7 be positioned at this supply opening 4.
[explanation of symbol]
1: fusion pot
2: molten metal
3: movable elbow
4: supply opening
5: injection room
6: fluid passage
7: injection plunger
8: nozzle
9: mould
9a: die cavity
9b: fixed mould
9c: moveable die
9d: liquid entrance
10: space
11: injection molding product
20: injection cylinder
21: fluid potential source
22: valve
30: stroke detection means
40: controller
Claims (9)
1. the method for operating of a hot chamber machine, by the injection plunger (7) of movable elbow (3) is moved up and down, and the molten metal (2) in fusion pot (1) is penetrated in the die cavity (9a) of mould (9) via oil-feed port (4), injection room (5), fluid passage (6), nozzle (8), thus by injection molding product (11) injection molding, the feature of the method for operating of described hot chamber machine is to comprise:
1st step, under the state of being closed by described mould (9), make injection plunger (7) till injection molding starting position moves to the injection end position of bottom downwards, the molten metal that will penetrate in room (5) penetrates after to the die cavity (9a) of mould (9), make injection plunger (7) be moved upward to the feed flow position of the top, described feed flow position is for penetrating the position of the supply opening (4) of room (5) and described fusion pot (1) described in open communication;
2nd step, make described injection plunger (7) after the standby setting-up time in described feed flow position, move to downwards than described feed flow position on the lower place and close supply opening (4) desired location till, thus nozzle side part formed space (10);
3rd step, under the state that the die cavity (9a) of mould (9) exists injection molding product (11), described injection plunger (7) is made to move to than described desired location place and till end-of-fill position, described end-of-fill position is the position of eliminating space (10) to described space (10) interior installations with molten metal on the lower downwards from described desired location;
4th step, described injection plunger (7) is made to be moved upward to than place and until described injection molding starting position by the top, described end-of-fill position from described end-of-fill position, described injection molding starting position is the position closing described oil-feed port (4), thus forms setting space (10) in nozzle side part; And
5th step, after described mould (9) takes out injection molding product (11), closes mould (9).
2. the method for operating of hot chamber machine according to claim 1, wherein
In described 3rd step, injection plunger (7) to be moved downwards and to installations with molten metal in space (10) from desired location, and injection plunger (7) stops in end-of-fill position thus,
In described 4th step, injection plunger (7) is moved upward with set stroke from end-of-fill position, thus is set to injection molding starting position.
3. the method for operating of hot chamber machine according to claim 2, wherein
The stroke detection means (30) that utilization detects the mobile stroke of described injection plunger (7) detects injection plunger (7) moves to top stroke from end-of-fill position, when the described stroke detected is for setting stroke, injection plunger (7) is made to stop and being set to injection molding starting position.
4. the method for operating of hot chamber machine according to any one of claim 1 to 3, wherein
The mobile stroke of the injection plunger (7) detected based on stroke detection means (30) detects the position of described injection plunger (7), to move to control and as the desired location of described injection plunger (7) according to the described position detected to injection plunger (7).
5. the method for operating of hot chamber machine according to any one of claim 1 to 4, wherein
In described 3rd step, the end-of-fill position of injection plunger (7) is set as target location, when the target location of described setting is different from actual end-of-fill position, revise end-of-fill position when upper injection molding action once by the stand-by time increased and decreased in the 2nd step.
6. the method for operating of hot chamber machine according to any one of claim 1 to 5, wherein
Make described injection plunger (7) from end-of-fill position move to prevent salivation position till and nozzle side part formed space (10), then mould (9) is opened.
7. the method for operating of hot chamber machine according to any one of claim 1 to 6, wherein
The size being formed at the space (10) of nozzle side part in described 2nd step is set to the size that molten metal in nozzle (8) and mould (9) separate.
8. the method for operating of hot chamber machine according to any one of claim 1 to 7, wherein
The liquid entrance (9d) of the fixed mould (9b) of described mould (9) contacts with nozzle (8) always, make moveable die (9c) mobile and mold closing, die sinking.
9. the method for operating of hot chamber machine according to any one of claim 1 to 8, wherein
After carrying out repeatedly injection molding action, change the desired location of described injection plunger (7).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/081904 WO2014091532A1 (en) | 2012-12-10 | 2012-12-10 | Method for operating hot chamber die casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104870122A true CN104870122A (en) | 2015-08-26 |
| CN104870122B CN104870122B (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280075351.8A Active CN104870122B (en) | 2012-12-10 | 2012-12-10 | The method of operating of hot chamber machine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104870122B (en) |
| TW (1) | TWI519363B (en) |
| WO (1) | WO2014091532A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134592B (en) * | 2020-01-17 | 2023-06-16 | Ykk株式会社 | Die casting device |
| DE102020207704A1 (en) * | 2020-06-22 | 2021-12-23 | Oskar Frech Gmbh + Co. Kg | Die casting machine and operating method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02241650A (en) * | 1989-03-15 | 1990-09-26 | Meichiyuu Seiki Kk | Apparatus for pouring molten metal |
| CN1191783A (en) * | 1997-02-25 | 1998-09-02 | Ykk株式会社 | Injection molding machine and injection molding method |
| CN1191784A (en) * | 1997-02-25 | 1998-09-02 | Ykk株式会社 | Injection molding machine and injection molding method |
| JPH10235462A (en) * | 1997-02-27 | 1998-09-08 | Ykk Corp | Injection molding machine and injection molding method |
| CN1538888A (en) * | 2001-06-06 | 2004-10-20 | 株式会社久保田 | Molten solution feeder |
| JP2010058130A (en) * | 2008-09-01 | 2010-03-18 | Gundai Kk | Hot chamber die casting machine |
| JP2010214448A (en) * | 2009-03-18 | 2010-09-30 | Kikuchiseisakusho Co Ltd | Hot chamber type die casting device |
-
2012
- 2012-12-10 WO PCT/JP2012/081904 patent/WO2014091532A1/en active Application Filing
- 2012-12-10 CN CN201280075351.8A patent/CN104870122B/en active Active
-
2013
- 2013-11-25 TW TW102142748A patent/TWI519363B/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02241650A (en) * | 1989-03-15 | 1990-09-26 | Meichiyuu Seiki Kk | Apparatus for pouring molten metal |
| CN1191783A (en) * | 1997-02-25 | 1998-09-02 | Ykk株式会社 | Injection molding machine and injection molding method |
| CN1191784A (en) * | 1997-02-25 | 1998-09-02 | Ykk株式会社 | Injection molding machine and injection molding method |
| JPH10235462A (en) * | 1997-02-27 | 1998-09-08 | Ykk Corp | Injection molding machine and injection molding method |
| CN1538888A (en) * | 2001-06-06 | 2004-10-20 | 株式会社久保田 | Molten solution feeder |
| JP2010058130A (en) * | 2008-09-01 | 2010-03-18 | Gundai Kk | Hot chamber die casting machine |
| JP2010214448A (en) * | 2009-03-18 | 2010-09-30 | Kikuchiseisakusho Co Ltd | Hot chamber type die casting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104870122B (en) | 2016-10-12 |
| TW201422338A (en) | 2014-06-16 |
| WO2014091532A1 (en) | 2014-06-19 |
| TWI519363B (en) | 2016-02-01 |
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