CN108856674B - Thin-wall large-packing-force casing die casting mould re-pushing device - Google Patents
Thin-wall large-packing-force casing die casting mould re-pushing device Download PDFInfo
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- CN108856674B CN108856674B CN201811051827.XA CN201811051827A CN108856674B CN 108856674 B CN108856674 B CN 108856674B CN 201811051827 A CN201811051827 A CN 201811051827A CN 108856674 B CN108856674 B CN 108856674B
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- 238000004512 die casting Methods 0.000 title claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 44
- 230000000712 assembly Effects 0.000 claims abstract description 19
- 238000000429 assembly Methods 0.000 claims abstract description 19
- 238000012856 packing Methods 0.000 claims abstract description 13
- 238000010586 diagram Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000886569 Cyprogenia stegaria Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2236—Equipment for loosening or ejecting castings from dies
-
- 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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
Abstract
The invention discloses a thin-wall large-packing-force casing die-casting mold re-pushing device which comprises a fixed die core, a front push plate assembly, a rear push plate assembly, a push plate push rod, an inner and outer push rod assembly, a movable die assembly, an inner die core, an outer edge cylinder core, a movable die insert, a push plate, a swing rod and a connecting rod, wherein the fixed die core is arranged on the fixed die core; ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod pushes the movable die insert through the push plate, and the inner and outer push rod assemblies synchronously push the shell casting to separate from the inner core and the outer edge cylinder core; ejection second stage: the rear push plate assembly pushes one end of the swing rod to rotate around one end of the connecting rod, and then the other end of the swing rod pushes the front push plate assembly to advance and the rear push plate assembly to move forwards, and the inner and outer push rod assemblies start to push the shell casting to be separated from the movable die insert; ejection third stage: the other end of the swing rod rotates to the limit position, and the shell casting is completely separated from the movable die insert. The invention is suitable for producing the casing casting with low integral strength, thin and long outer edge cylinder wall and high packing force.
Description
Technical Field
The invention relates to a die casting die, in particular to a thin-wall large-packing-force shell die casting die re-pushing device.
Background
The housing of the single flange axial flow fan is an aluminum alloy (YL 102) die cast. As shown in figure 1, the casting is structurally a composite structure consisting of an inner edge end cover and an outer edge flanged cylinder part, and the inner edge and the outer edge are connected into a whole by three phi 5 circular section ribs. Its advantages are low integral strength, thin and long external cylinder wall and high packing strength. If a conventional full pushrod ejector mechanism is used, the outboard ejection force point can only be placed next to the mounting hole at the extreme flange lug (phi 4.5). As a result, during ejection, the cast barrel wall lugs break and fail, and a rocker re-ejection mechanism must be employed to eject the cast from the cavity after the large packing forces of the barrel wall and core are removed.
In order to meet the requirements of users, the wall thickness of the fan shell is only 1mm, the thickness of the mounting flange is 4mm, the strength of the junction is quite different, serious stress concentration exists, the junction is quite easy to crack when stressed, the difficulty of mould design is greatly increased, and measures are needed to be taken on an ejection mechanism in order to ensure that the molding ejection of the shell casting is not deformed.
From structural analysis of the casing, the arrangement of the die cavity on the movable die is the only option, but the arrangement is also the only option, because the small end cover on the inner edge is on the same side as the flange on the outer edge. If a traditional full push rod or a pushing plate mechanism is adopted, the former can cause the root of the phi 104 outer cylinder wall to form larger stress concentration at the joint of the phi 102 outer cylinder wall and the outer edge flange to jack up and crush the outer edge flange due to the strong packing force of the phi 102 cylinder wall; the latter, while capable of ejecting the entire shell casting from the phi 102 large core, secures the shell cavity itself to the stripper plate, meaning that the shell casting can never be ejected from the cavity. The difficulty with this die-casting mold is therefore how to push the casting out smoothly without damaging the casing.
Disclosure of Invention
In order to push out the casting from the cavity after getting rid of the large packing force of the cylinder wall and the core, the invention provides a thin-wall large packing force shell die casting mould re-pushing device.
The technical scheme adopted by the invention is as follows:
the device comprises a fixed die plate, a fixed die core, a front push plate assembly, a rear push plate assembly, a push plate push rod, an inner and outer push rod assembly, a movable die assembly, an inner core, an outer edge cylinder core, a movable die insert, a push plate, a swing rod and a connecting rod; the fixed mold core is arranged on the fixed mold plate; the inner core, the outer edge cylinder core and the movable die insert are nested from inside to outside and form a die cavity by combining the fixed die core; the moving die assembly fixes the inner core and the outer rim barrel core; the front push plate assembly is used for fixing the inner and outer push rod assemblies, and the rear push plate assembly is used for fixing the push rod of the push plate; one end of the swing rod is rotationally connected with one end of the connecting rod, and the other end of the connecting rod is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod pushes the movable die insert through the push plate, and the inner and outer push rod assemblies synchronously push the shell casting to be separated from the inner core and the outer edge cylinder core; during the ejection second stage: the rear push plate assembly pushes one end of the swing rod to rotate around one end of the connecting rod, the other end of the swing rod further pushes the front push plate assembly to advance the rear push plate assembly to move forwards, and the inner and outer push rod assemblies start to push the shell casting to be separated from the movable die insert; during the ejection third stage: the other end of the swing rod rotates to the limit position, and the shell casting is completely separated from the movable die insert.
Preferably, the inner and outer push rod assemblies comprise inner edge push rods, rib push rods, flange outer edge push rods and sprue push rods; the front push plate assembly is used for fixing the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod.
A thin-wall large-packing tightening casing die-casting mould re-pushing device comprises a fixed die plate, a fixed die core, a front push plate assembly, a rear push plate assembly, a push plate push rod, a sprue push rod, a flange outer edge push rod, a rib push rod, an inner edge push rod, a movable die assembly, an inner core, an outer edge cylinder core, a movable die insert, a push plate, a bearing chamber hole core, a mounting hole core, a swing rod and a connecting rod; the fixed mold core is arranged on the fixed mold plate; the bearing chamber hole core and the mounting hole core are mounted on the fixed mold core; the inner core, the outer edge cylinder core and the movable die insert are nested from inside to outside, and a die cavity is formed by combining the fixed die core, the bearing chamber hole core and the mounting hole core; the moving die assembly fixes the inner core and the outer rim barrel core; the front push plate assembly is used for fixing the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod, and the rear push plate assembly is used for fixing the push plate push rod; one end of the swing rod is rotationally connected with one end of the connecting rod, and the other end of the connecting rod is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod pushes the movable mold insert through the push plate, and synchronously the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod push the shell casting to be separated from the inner core and the outer edge cylinder core; during the ejection second stage: the rear push plate assembly pushes one end of the swing rod to rotate around one end of the connecting rod, the other end of the swing rod further pushes the front push plate assembly to advance the rear push plate assembly to move forwards, and the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod start to push the shell casting to be separated from the movable die insert; during the ejection third stage: and when the other end of the swing rod rotates to the limit position, the shell casting is completely separated from the movable die insert.
Preferably, the swing rod comprises a first folding edge and a second folding edge, one end of the first folding edge is rotationally connected with the other end of the connecting rod, and the other end of the first folding edge is connected with one end of the second folding edge; the included angle between the first folded edge and the second folded edge is more than 90 degrees and less than 180 degrees; when the surface of the rear push plate assembly is flush with the second flange, the rear push plate assembly starts to push the swing rod to rotate around the other end of the connecting rod; when the surface of the rear push plate assembly is flush with the first folded edge, the swing rod rotates to a limit position.
Preferably, both ends of the second folding edge and one end of the first folding edge are provided with rollers, and the rear push plate assembly pushes the swing rod to rotate around one end of the connecting rod through the rollers.
Preferably, an included angle between the first folded edge and the second folded edge is 135 °.
Preferably, the other end of the connecting rod is provided with a tenon, and correspondingly the movable die assembly is provided with a groove, and the tenon is embedded in the groove.
Preferably, the fixed die plate is provided with a side gate, and the side gate is provided with a gate sleeve.
Preferably, the end face of the outer edge cylinder core is provided with a plurality of uniformly distributed auxiliary pouring gates.
Preferably, the auxiliary gate push rod is included; the front push plate assembly is used for fixing the auxiliary gate push rod; and in the ejection first stage, the inner edge push rod, the rib push rod, the flange outer edge push rod, the sprue push rod and the auxiliary sprue push rod push the shell casting to separate from the inner core and the outer edge cylinder core.
Preferably, the rear push plate assembly comprises a rear push plate and a rear push rod fixing plate, and the rear push plate is fixedly connected with the rear push rod fixing plate through screws; the head of the push rod plate is arranged on the counter bore of the rear push rod fixing plate and is abutted against the rear push plate; and in the ejection second stage, the rear push plate pushes the other end of the swing rod to rotate around the other end of the connecting rod, and then the other end of the swing rod pushes the front push plate assembly to move forwards.
Preferably, the front push plate assembly comprises a front push plate and a front push rod fixing plate, and the front push plate and the front push rod fixing plate are fixedly connected through screws; the head parts of the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod are arranged on the counter bore of the front push rod fixing plate and are abutted against the front push plate.
Preferably, the movable die assembly comprises a push plate guide post, and the movable die assembly is used for fixing the push plate guide post; the front push plate assembly is provided with a front push plate guide sleeve, the rear push plate assembly is provided with a rear push plate guide sleeve, and the push plate guide post penetrates through the front push plate guide sleeve and the rear push plate guide sleeve.
Preferably, the front push plate assembly comprises a reset rod, and the front push plate assembly is used for fixing the reset rod; the reset rod penetrates through the movable die assembly and the pushing piece plate.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention is suitable for casting the casing with low integral strength, thin and long outer edge cylinder wall and large packing force, and can push the casting out from the cavity after getting rid of the large packing force of the cylinder wall and the core;
the invention has simple and reliable structure, and can eject the casing castings with flanges and cylinder walls with great thickness after molding;
one end of the connecting rod is fixedly connected with the movable die assembly through a screw, and is embedded into a corresponding groove through a tenon and locked by the screw, so that the rigidity and the deformation resistance of the connecting rod are obviously improved;
two rollers are arranged at the contact position of the swing rod and the rear push plate (the rollers at the two ends of the first folding edge and the second folding edge are both provided with the rollers, and the rollers at the joint are shared), so that the hard friction and impact between the swing rod and the rear push plate in the working process can be reduced to the maximum extent, and the swing rod can rotate relatively stably around the connecting rod shaft;
the invention adopts side gate feeding with convenient gate removal, and the required filling flow is effectively compensated by adding the auxiliary gate on the end surface of the outer edge cylinder core, so that a better effect is achieved.
Drawings
FIG. 1 is a block diagram of a housing part according to an embodiment of the present invention;
FIG. 2 is a block diagram of a thin-wall high-packing-force casing die-casting mold re-pushing device according to an embodiment of the invention;
FIG. 3 is a schematic view illustrating a state of an ejector mechanism according to an embodiment of the present invention;
FIG. 4 is a block diagram of a movable mold insert according to an embodiment of the present invention;
FIG. 5 is a block diagram of an outer rim barrel core according to an embodiment of the present invention;
FIG. 6 is a block diagram of a stationary mold core according to an embodiment of the present invention;
FIG. 7 is a block diagram of a pendulum rod according to one embodiment of the present invention;
FIG. 8 is a cross-sectional view of a roller in accordance with one embodiment of the present invention;
fig. 9 is a block diagram of a connecting rod according to an embodiment of the present invention.
In the figure, a sprue bush is shown as 1-part; 2-an outer rim barrel core; 3-an inner core; 4-bearing chamber Kong Xingxin; 5-inner edge push rod; 6-bar pushing rod; 7-mounting Kong Xingxin; 8-fixing the mold core; 9-moving mold inserts; 10-a fixed die guide sleeve; 11-a fixed template; 12-moving die guide posts; 13-a movable mould guide sleeve; 14-a reset lever; 15-a pusher plate; 16-pusher plate push rod; 17-moving templates; 18-fastening a screw; 19-a movable mould cover plate; 20-a flange outer edge push rod; 21-a push plate guide post; 22-a front push rod fixing plate; 23-front push plate; 24-a rear push rod fixing plate; 25-a front push plate guide sleeve; 26-a rear push plate guide sleeve; 27-a rear push plate; 28-a bottom plate; 29-socket head cap screw; 30-rolling wheels; 31-swinging rod; 32-rotating shaft; 33-connecting rod; 34-socket head cap screw; 35-socket head cap screw; 36-bar pushing rod; 37-sprue push rod.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 9, a thin-wall large-packing-force casing die-casting mold re-pushing device comprises a fixed die plate 11, a fixed die core 8, a front push plate assembly, a rear push plate assembly, a push plate push rod 16, an inner and outer edge push rod assembly, a movable die assembly, an inner core 3, an outer edge cylinder core 2, a movable die insert 9, a push plate 15, a swing rod 31 and a connecting rod 33; the fixed mold core 8 is arranged on the fixed mold plate 11; the inner core 3, the outer edge cylinder core 2 and the movable mold insert 9 are nested from inside to outside and form a mold cavity by combining the fixed mold core 8; the movable mould assembly is used for fixing the inner core 3 and the outer edge cylinder core 2; the front push plate assembly fixes the inner and outer push rod assemblies and the rear push plate assembly fixes the pusher plate push rod 16; one end of the swing rod 31 is rotationally connected with one end of the connecting rod 33, and the other end of the connecting rod 33 is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod 16 pushes the movable mould insert 9 through the push plate 15, and synchronously the inner and outer push rod assemblies push the shell casting to be separated from the inner core 3 and the outer cylinder core 2; during the ejection second stage: one end of the swing rod 31 is pushed by the rear push plate assembly to rotate around one end of the connecting rod 33, and then the other end of the swing rod 31 pushes the front push plate assembly to advance and the rear push plate assembly to move forwards, and the inner and outer push rod assemblies start to push the shell casting to be separated from the movable mould insert 9; during the ejection third stage: the other end of the swing rod 31 rotates to the limit position, and the shell casting is completely separated from the movable mould insert 9.
In one embodiment of the invention, the inner and outer pushrod assemblies include an inner pushrod 5, a ribbed pushrod (6, 36), a flanged outer pushrod 20, and a sprue pushrod 37; the front push plate assembly secures the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20 and the sprue push rod 37.
Referring to fig. 1 to 9, a thin-wall large packing force casing die casting mold re-pushing device includes a fixed mold plate, a fixed mold core 8, a front push plate assembly, a rear push plate assembly, a push plate push rod 16, a sprue push rod 37, a flange outer edge push rod 20, a rib push rod (6, 36), an inner edge push rod 5, a movable mold assembly, an inner core 3, an outer edge cylinder core 2, a movable mold insert 9, a push plate 15, a bearing chamber hole core 4, a mounting hole core 7, a swing rod 31 and a connecting rod 33; the fixed mold core 8 is arranged on the fixed mold plate 11; the bearing chamber hole type core 4 and the mounting hole type core 7 are mounted on the fixed mold core 8; the inner core 3, the outer edge cylinder core 2 and the movable mold insert 9 are nested from inside to outside, and form a mold cavity by combining the fixed mold core 8, the bearing chamber hole type core 4 and the mounting hole type core 7; the movable mould assembly is used for fixing the inner core 3 and the outer edge cylinder core 2; the front push plate assembly fixes the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20 and the sprue push rod 37, and the rear push plate assembly fixes the push plate push rod 16; one end of the swing rod 31 is rotationally connected with one end of the connecting rod 33, and the other end of the connecting rod 33 is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod 16 pushes the movable mould insert 9 through the push plate 15, and synchronously the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20 and the sprue push rod 37 push the shell casting to be separated from the inner core 3 and the outer edge cylinder core 2; during the ejection second stage: one end of the swing rod 31 is pushed by the rear push plate assembly to rotate around one end of the connecting rod 33, and then the other end of the swing rod 31 pushes the front push plate assembly to advance, the rear push plate assembly moves forwards, and the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20 and the sprue push rod 37 start to push the shell casting to be separated from the movable die insert 9; during the ejection third stage: when the other end of the swing rod 31 rotates to the limit position, the shell casting is completely separated from the movable mould insert 9.
In one embodiment of the present invention, the re-pushing mechanism composed of the swing rod 31 and the connecting rod 33 is two groups and is distributed at the symmetrical position of the re-pushing device, but the present invention is not limited thereto.
In one embodiment of the present invention, the swing link 31 includes a first folded edge and a second folded edge, one end of the first folded edge is rotatably connected to the other end of the connecting rod 33, and the other end of the first folded edge is connected to one end of the second folded edge; the included angle between the first folded edge and the second folded edge is more than 90 degrees and less than 180 degrees; when the surface of the rear push plate assembly is flush with the second flange, the rear push plate assembly starts to push the swing rod 31 to rotate around the other end of the connecting rod 33; when the surface of the rear push plate assembly is flush with the first fold, the swing rod 31 rotates to the limit position.
In one embodiment of the present invention, both ends of the second fold and one end of the first fold are provided with rollers 30, and the rear push plate assembly pushes the swing rod 31 to rotate around one end of the connecting rod 33 through the rollers 30.
In one embodiment of the invention, the angle between the first flange and the second flange is 135 °.
In one embodiment of the invention, the other end of the connecting rod 33 is provided with a tongue, and correspondingly the movable mould assembly is provided with a groove, into which the tongue is embedded.
In one embodiment of the invention, a side gate is arranged on the fixed die plate, and a gate sleeve 1 is arranged on the side gate. As can be seen from fig. 2, the pouring system adopts a side gate, and is fed from the outer edge flange and is filled to the inner side through three connecting ribs, so that the three connecting ribs serve as the inner gate of the inner edge entity. The biggest advantage of selecting side gate is that it is convenient to remove the runner.
In one embodiment of the invention, the end face of the outer edge cylinder core 2 is provided with a plurality of uniformly distributed auxiliary gates. As can be seen from the left graph of FIG. 2, only one rib facing the constant flow channel is the most smooth channel, and the other two ribs are filled by the back flow after impact, so that the filling can be successfully completed by adding three auxiliary pouring gates (shown in FIG. 5) due to great pressure loss, and the surface quality of the shell is satisfactory.
In one embodiment of the invention, an auxiliary gate pushrod is included; the front push plate assembly is used for fixing an auxiliary gate push rod; during the first ejection stage, the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20, the sprue push rod 37 and the auxiliary sprue push rod push the shell casting to separate from the inner core 3 and the outer edge barrel core 2. In the design, the bottom of the auxiliary pouring gate of the outer edge cylinder core 2 is provided with a through hole, the through hole comprises two aperture sections, the aperture section close to the auxiliary pouring gate is smaller than the aperture section far away from the auxiliary pouring gate, the function of the through hole is to reduce the premature damage of the push rod due to long-distance friction between the core hole and the push rod, and the clearance fit length between the push rod and the corresponding hole is 1.5-2 times of the diameter of the push rod.
In one embodiment of the present invention, the rear push plate assembly comprises a rear push plate 27 and a rear push rod fixing plate 24, and the rear push plate 27 and the rear push rod fixing plate 24 are fixedly connected by a socket head cap screw 29; the head of the push rod 16 of the push piece plate is arranged on the counter bore of the rear push rod fixing plate 24 and is abutted against the rear push plate 27; in the second ejection stage, the rear push plate 27 pushes the other end of the swing rod 31 to rotate around the other end of the connecting rod 33, and then the other end of the swing rod 31 pushes the front push plate assembly to move forwards.
In one embodiment of the present invention, the front push plate assembly includes a front push plate 23 and a front push rod fixing plate 22, and the front push plate 23 and the front push rod fixing plate 22 are fixedly connected by a screw; the heads of the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20 and the sprue push rod 37 are arranged on the counter bore of the front push rod fixing plate 22 and are abutted against the front push plate 23.
In one embodiment of the invention, the movable die assembly comprises a push plate guide post 21, and the movable die assembly is used for fixing the push plate guide post 21; the front push plate assembly is provided with a front push plate guide sleeve 25, the rear push plate assembly is provided with a rear push plate guide sleeve 26, and the push plate guide post 21 penetrates through the front push plate guide sleeve 25 and the rear push plate guide sleeve 26.
In one embodiment of the present invention, comprising a reset lever 14, the front push plate assembly secures the reset lever 14; the reset lever 14 penetrates the movable die assembly and the stripper plate 15.
In one embodiment of the invention, a base plate 28 is included, the base plate 28 securing the movable die assembly by the set screw 18.
In one embodiment of the invention, the movable die guide post 12 is included, the fixed die guide sleeve 10 is arranged on the fixed die plate, and the movable die guide sleeve 13 is arranged on the pushing piece plate 15; the movable die assembly fixes the movable die guide post 12, and the movable die guide post 12 penetrates through the fixed die guide sleeve 10 and the movable die guide sleeve 13.
In one embodiment of the invention, the movable die assembly comprises a movable die cover plate 19 and a movable die plate 17, and the movable die guide post 12 and the head of the outer edge cylinder core 2 are arranged in a counter bore of the movable die plate 17 and are abutted on the movable die cover plate 19; the movable die cover plate 19 and the movable die plate 17 are fixedly connected through socket head cap screws 34; the movable die cover plate 19 and the movable die plate 17 are fixed to the bottom plate 28 by fastening screws 18.
In one embodiment of the present invention, the other end of the connecting rod 33 is fixed to the movable die plate 17 by a socket head cap screw 35, and in addition, a tenon is provided in the middle of the connecting rod 33, and a groove is provided in the movable die cover plate 19 so that the tenon is embedded in the groove and locked by the socket head cap screw.
As shown in fig. 2, a group of push plates (a rear push rod fixing plate 24 and a rear push plate 27) is added to the push mechanism, and the movement speed difference of the front push plate and the rear push plate is realized by depending on a swing rod 31, and the basic principle is as follows: (1) The ejector cylinder piston rod of the die casting machine pushes the rear push plate 27, at the moment, the front push plate 22, the front push plate 23, the rear push plate 24, the rear push plate 27 and all push rods arranged on the front push plate are simultaneously pushed forward, so that the ejector plate 15 (pushed by the ejector plate push rod 16) and the rest push rods simultaneously push the casting to separate from the core, and the first demolding is completed; (2) The piston rod of the ejection cylinder of the die casting machine continues to push forwards, the rear push plate 27 contacts the roller 30 arranged on the swing rod 31, and the forward push plate assembly provided with the inner edge push rod 5, the rib push rods (6, 36), the flange outer edge push rod 20, the rib push rods (6, 36) and the sprue push rod 37 moves forwards more than the forward movement distance S of the push plate push rod 16 (the push plate 15 is pushed by the push plate) due to the included angle of 135 degrees of the swing rod 0 Thus, the casting and the cavity installed in the stripper plate 15 are displaced relatively, and the casting is smoothly demolded.
As shown in fig. 3, in the first ejection stage, the ejector plate ejector pins 16 and the inner and outer edge ejector pin assemblies have the same ejection distance, which means that in this process, the ejector plate 15 drives the ejection of the cavity to be synchronous with the ejection of the inner and outer edge ejector pin assemblies, so as to enable the casing casting to be ejected from the movable mold core smoothly; in the second ejection stage, the swing rod 31 is triggered, and when the swing rod 31 rotates to the illustrated position around the rotating shaft 32 of the connecting rod 33, the inner and outer push rod assemblies are about to start to advance; in the third ejection stage, the swing rod 31 rotates to the limit, and at this time, the inner and outer push rod assemblies advance the ejection distance So of the ejector plate push rod 16, and the specific calculation process is as follows:
(1) Scritical=l 1 Sin45°-L 1 Sin(45°-arcSin5/L 2 )＝
＝35×0.707-35×Sin(45°-Sin -1 5/42.5)＝24.7-21.7＝3
(2) Ejector plate push rod 16 ejector distance s= 5+L 1 Sin45°＝5+35×0.707＝29.8
(3) Ejection distance sz= (L) of inner and outer edge push rods 1 +L 2 )Sin45°＝
＝(35+42.5)×0.707＝54.8
(4) The inner and outer edge push rod assemblies advance the push plate push rods 16 by an ejection distance so=sz-s=54.8-29.8=25
The working principle of the invention is as follows:
(1) Die casting molding
As shown in fig. 2, the injection punch presses molten aluminum alloy into the sprue bush 1 of the die through cold pressing of the die casting machine, and the molten aluminum alloy is injected into the die cavity through a cross flow and an in-gate of the movable die insert 9 (shown in fig. 4) and pressurized (the die is solidified under high pressure);
(2) Mold opening pushing piece
After cooling, the die is opened, and the parting surface is opened, at the moment, the packing force of the outer edge cylinder core 2 (shown in fig. 5) and the inner core 3 far exceeds the packing force of the fixed die core 8 (shown in fig. 6), so that the shell casting is left on the movable die side after the die is opened; starting an ejection cylinder of the die casting machine, pushing a rear push plate 27, as shown in fig. 2, when the rear push plate 27 touches a roller 30 (shown in fig. 8) arranged on a swing rod 31 (shown in fig. 7), and the swing rod 31 is arranged on a connecting rod 33 and can rotate around a rotating shaft 32, wherein the swing rod 31 is laterally pressed to rotate from a left limit position to a right limit position, so that firstly, an inner and outer edge push rod assembly and a push plate 15 synchronously release a shell casting from a movable mold core, and the inner and outer edge push rod assembly exceeds so=25mm on the push stroke of the push plate 15 along with the continuous pushing of a piston rod of the ejection cylinder of the die casting machine;
(3) Resetting
After the workpiece is taken, the reset rod 14 firstly contacts the fixed die plate 11 along with the progress of die assembly, and along with the backward pushing of the reset rod 14, the front push plate 23 sequentially pushes the swing rod 31 and the rear push plate assembly until the initial position shown in fig. 2 is restored;
(4) Repeating the above operation may proceed to the next duty cycle.
The invention is mainly characterized in that:
(1) Simple and reliable structure
For a normal casing casting (shown in fig. 1), the ejection difficulty after forming is not quite a lot, because the thickness of the flange of the casing is quite different from that of the wall of the phi 104 cylinder, and if a traditional full push rod pushing mechanism is adopted, the fracture caused by stress concentration occurs at the junction of the flange and the wall of the phi 104 cylinder. When two groups of push plates are adopted to realize the re-pushing, namely, the two groups of push plates are synchronously pushed in the first stage, the combined force of the push plate 15 and the push rod breaks away the shell casting from the movable mould core, but the shell casting still stays in the cavity of the push plate 15 at the moment, in order to eject the shell casting from the cavity, the push rod needs to have an advanced motion relative to the push plate 15, and a swing rod swinging mechanism consisting of a swing rod 31 and a connecting rod 33 can realize the aim;
(2) Connecting rod anti-loosening structure
In the swing rod swinging mechanism shown in fig. 2, the connecting rod 33 is of a cantilever structure, the screw is easy to loosen after the bracket is stressed, so that the re-pushing action is invalid, accidents are more likely to happen, a tenon with the width of 12mm and the height of 10mm is arranged in the middle of the connecting rod 33 so as to be embedded into a corresponding groove of the movable die cover plate 19 shown in fig. 2, and the left screw is used for locking, so that the rigidity and the deformation resistance of the connecting rod 33 are obviously improved;
(3) Friction is reduced, and motion stability is improved
As shown in fig. 7, the swing link 31 is not a imagined integral structure, and two rollers 30 (in clearance fit with the shaft) are installed at the contact position with the rear push plate 27, so that hard friction and impact with the rear push plate 27 in operation can be reduced to the maximum extent, and the swing link 31 rotates relatively smoothly around the rotating shaft 32 of the connecting rod 33.
(4) Side gate feeding with convenient gate removal
Conventionally, a shell of this type of structure generally employs a center gate fed from an inner end cap because the center gate is smoothly and uniformly filled, which is advantageous for the molten aluminum material to be uniformly filled from the inner end cap to the outer flanged cylinder by three connecting ribs which can be secondary inner gates, but the greatest disadvantage of the center gate is that deformation of the end face of the inner end cap is caused at the moment of breaking the inner gate and the gate scrap must be cut off on a lathe by means of a special jig. The side gate filled from the outer edge flanged cylinder part to the inner edge end cover has the advantages that the side gate is convenient to remove, a fixed die can omit a middle plate for removing the gate waste, but the trouble caused by molding is that only one phi 5 connecting rib can serve as a main runner when the phi 56.5 inner edge end cover is filled, so that three uniformly distributed 10mm wide auxiliary gates (shown in fig. 5) are added on the end surface of the outer edge cylinder core 2, the required filling flow is effectively compensated, and a better effect is achieved.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. The device is characterized by comprising a fixed die plate, a fixed die core, a front push plate assembly, a rear push plate assembly, a push plate push rod, an inner and outer push rod assembly, a movable die assembly, an inner core, an outer edge cylinder core, a movable die insert, a push plate, a swing rod and a connecting rod; the fixed mold core is arranged on the fixed mold plate; the inner core, the outer edge cylinder core and the movable die insert are nested from inside to outside and form a die cavity by combining the fixed die core; the moving die assembly fixes the inner core and the outer rim barrel core; the front push plate assembly is used for fixing the inner and outer push rod assemblies, and the rear push plate assembly is used for fixing the push rod of the push plate; one end of the swing rod is rotationally connected with one end of the connecting rod, and the other end of the connecting rod is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod pushes the movable die insert through the push plate, and the inner and outer push rod assemblies synchronously push the shell casting to be separated from the inner core and the outer edge cylinder core; during the ejection second stage: the rear push plate assembly pushes one end of the swing rod to rotate around one end of the connecting rod, the other end of the swing rod further pushes the front push plate assembly to advance the rear push plate assembly to move forwards, and the inner and outer push rod assemblies start to push the shell casting to be separated from the movable die insert; during the ejection third stage: the other end of the swing rod rotates to the limit position, and the shell casting is completely separated from the movable die insert.
2. The thin-walled high-packing-force casing die-casting re-pushing device of claim 1, wherein the inner and outer pushrod assemblies comprise an inner pushrod, a rib pushrod, a flange outer pushrod and a sprue pushrod; the front push plate assembly is used for fixing the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod.
3. The device is characterized by comprising a fixed die plate, a fixed die core, a front push plate assembly, a rear push plate assembly, a push plate push rod, a sprue push rod, a flange outer edge push rod, a rib push rod, an inner edge push rod, a movable die assembly, an inner core, an outer edge cylinder core, a movable die insert, a push plate, a bearing chamber hole core, a mounting hole core, a swing rod and a connecting rod; the fixed mold core is arranged on the fixed mold plate; the bearing chamber hole core and the mounting hole core are mounted on the fixed mold core; the inner core, the outer edge cylinder core and the movable die insert are nested from inside to outside, and a die cavity is formed by combining the fixed die core, the bearing chamber hole core and the mounting hole core; the moving die assembly fixes the inner core and the outer rim barrel core; the front push plate assembly is used for fixing the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod, and the rear push plate assembly is used for fixing the push plate push rod; one end of the swing rod is rotationally connected with one end of the connecting rod, and the other end of the connecting rod is fixed on the movable die assembly;
during the ejection first stage: the rear push plate assembly pushes the front push plate assembly, the push plate push rod pushes the movable mold insert through the push plate, and synchronously the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod push the shell casting to be separated from the inner core and the outer edge cylinder core; during the ejection second stage: the rear push plate assembly pushes one end of the swing rod to rotate around one end of the connecting rod, the other end of the swing rod further pushes the front push plate assembly to advance the rear push plate assembly to move forwards, and the inner edge push rod, the rib push rod, the flange outer edge push rod and the sprue push rod start to push the shell casting to be separated from the movable die insert; during the ejection third stage: and when the other end of the swing rod rotates to the limit position, the shell casting is completely separated from the movable die insert.
4. The device for pushing out the die-casting mold of the thin-wall large-packing-force machine shell according to claim 3, wherein the swing rod comprises a first folded edge and a second folded edge, one end of the first folded edge is rotationally connected with the other end of the connecting rod, and the other end of the first folded edge is connected with one end of the second folded edge; the included angle between the first folded edge and the second folded edge is more than 90 degrees and less than 180 degrees; when the surface of the rear push plate assembly is flush with the second flange, the rear push plate assembly starts to push the swing rod to rotate around the other end of the connecting rod; when the surface of the rear push plate assembly is flush with the first folded edge, the swing rod rotates to a limit position.
5. The device for re-pushing out a die-casting mold of a thin-wall high-tightening casing according to claim 4, wherein rollers are respectively arranged at two ends of the second folded edge and one end of the first folded edge, and the rear push plate assembly pushes the swing rod to rotate around one end of the connecting rod through the rollers.
6. The thin-walled high packing casing die-casting re-ejector device of claim 4, wherein the included angle between the first flange and the second flange is 135 °.
7. A thin-wall high-packing-force casing die-casting mould re-pushing device according to claim 3, wherein the other end of the connecting rod is provided with a tenon, and the movable mould component is correspondingly provided with a groove, and the tenon is embedded into the groove.
8. The thin-wall high-packing-force casing die-casting mold re-pushing device according to claim 3, wherein the fixed die plate is provided with a side gate, and the side gate is provided with a gate sleeve.
9. The thin-wall high-packing-force casing die-casting mold re-pushing device according to claim 8, wherein a plurality of uniformly distributed auxiliary pouring gates are arranged on the end face of the outer edge cylinder core.
10. The thin-walled high-packing-force casing die-casting mold re-pushing device of claim 9, comprising an auxiliary gate push rod; the front push plate assembly is used for fixing the auxiliary gate push rod; and in the ejection first stage, the inner edge push rod, the rib push rod, the flange outer edge push rod, the sprue push rod and the auxiliary sprue push rod push the shell casting to separate from the inner core and the outer edge cylinder core.
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| CN201811051827.XA CN108856674B (en) | 2018-09-10 | 2018-09-10 | Thin-wall large-packing-force casing die casting mould re-pushing device |
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| CN201811051827.XA CN108856674B (en) | 2018-09-10 | 2018-09-10 | Thin-wall large-packing-force casing die casting mould re-pushing device |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009143062A (en) * | 2007-12-12 | 2009-07-02 | Citizen Electronics Co Ltd | Molding die mechanism of thin-wall injection molded piece |
| CN102836987A (en) * | 2012-08-23 | 2012-12-26 | 霍新杰 | Die casting mould of zinc alloy shell body |
| CN103521736A (en) * | 2013-03-29 | 2014-01-22 | 洛阳洛北重工机械有限公司 | Impeller die-casting die |
| CN203426411U (en) * | 2013-08-11 | 2014-02-12 | 牟维军 | Bent pin side core-pulling thin-wall deep-cavity die-casting die |
| CN103786314A (en) * | 2014-02-19 | 2014-05-14 | 盐城工业职业技术学院 | Joint push-out mechanism plastic die |
| CN103934965A (en) * | 2014-04-03 | 2014-07-23 | 苏州益群模具有限公司 | Injection mould provided with push plate ejection mechanism |
| CN203792630U (en) * | 2014-02-19 | 2014-08-27 | 盐城工业职业技术学院 | Plastic mold of combined ejecting mechanism |
| CN203804193U (en) * | 2014-05-09 | 2014-09-03 | 牟维军 | Die for producing products by pin gate gating and ejection plate ejection |
| CN104384476A (en) * | 2014-11-17 | 2015-03-04 | 合肥朗佳机电设备有限公司 | Push-out device for metal die-casting die |
| CN108188375A (en) * | 2018-02-14 | 2018-06-22 | 苏州工业职业技术学院 | A kind of two-flange shaft flow fan casing compression mod |
| CN208787493U (en) * | 2018-09-10 | 2019-04-26 | 苏州工业职业技术学院 | The big package power casing compression mod of thin-walled push-off device again |
-
2018
- 2018-09-10 CN CN201811051827.XA patent/CN108856674B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009143062A (en) * | 2007-12-12 | 2009-07-02 | Citizen Electronics Co Ltd | Molding die mechanism of thin-wall injection molded piece |
| CN102836987A (en) * | 2012-08-23 | 2012-12-26 | 霍新杰 | Die casting mould of zinc alloy shell body |
| CN103521736A (en) * | 2013-03-29 | 2014-01-22 | 洛阳洛北重工机械有限公司 | Impeller die-casting die |
| CN203426411U (en) * | 2013-08-11 | 2014-02-12 | 牟维军 | Bent pin side core-pulling thin-wall deep-cavity die-casting die |
| CN103786314A (en) * | 2014-02-19 | 2014-05-14 | 盐城工业职业技术学院 | Joint push-out mechanism plastic die |
| CN203792630U (en) * | 2014-02-19 | 2014-08-27 | 盐城工业职业技术学院 | Plastic mold of combined ejecting mechanism |
| CN103934965A (en) * | 2014-04-03 | 2014-07-23 | 苏州益群模具有限公司 | Injection mould provided with push plate ejection mechanism |
| CN203804193U (en) * | 2014-05-09 | 2014-09-03 | 牟维军 | Die for producing products by pin gate gating and ejection plate ejection |
| CN104384476A (en) * | 2014-11-17 | 2015-03-04 | 合肥朗佳机电设备有限公司 | Push-out device for metal die-casting die |
| CN108188375A (en) * | 2018-02-14 | 2018-06-22 | 苏州工业职业技术学院 | A kind of two-flange shaft flow fan casing compression mod |
| CN208787493U (en) * | 2018-09-10 | 2019-04-26 | 苏州工业职业技术学院 | The big package power casing compression mod of thin-walled push-off device again |
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| CN108856674A (en) | 2018-11-23 |
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