CN203936324U - For the link gear of taking out plunger tip and folding mould of core-shooting box die - Google Patents
For the link gear of taking out plunger tip and folding mould of core-shooting box die Download PDFInfo
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- CN203936324U CN203936324U CN201420168402.8U CN201420168402U CN203936324U CN 203936324 U CN203936324 U CN 203936324U CN 201420168402 U CN201420168402 U CN 201420168402U CN 203936324 U CN203936324 U CN 203936324U
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Abstract
The utility model relates to a kind of link gear of taking out plunger tip and folding mould for core-shooting box die, it is characterized in that: also comprise push pedal, push pedal is by oil cylinder pushing, and the lower end of plunger tip bar is fixed in push pedal; The guide rod that two parallel interval arrange, the lower end of each guide rod is fixed in push pedal; In order to a left side loose core the left push rod that is connected, with the right right push rod that is connected of loosing core, with after the rear push-rod of loosing core and being connected, on each push rod, be arranged with and make each push rod maintenance move the spring of trend outward; Rotation is arranged on the left driving cam on lower mold holder, right driving cam and rear drive cam, the outer end of each push rod and the side face of each driving cam are conflicted, and between left driving cam and rear drive cam, be connected by connecting rod between right driving cam and rear drive cam; Between push pedal and rear drive cam, be connected by drive mechanism.This link gear only uses a hydraulic cylinder as driving element, will loose core, plunger tip and die sinking action accomplishs without any letup, and the quantity of having saved hydraulic cylinder, has reduced energy consumption, has simplified electrical control.
Description
Technical field
The utility model relates to big-and-middle-sized integrated core shooting box mould, especially relates to a kind of link gear of taking out plunger tip and folding mould for core-shooting box die, and this core-shooting box die is whole core-shooting box die for central guide frame of side rack of railway vehicle.
Background technology
The product of existing employing core-shooting box die coremaking is all to have complicated profile and many hollow structures, and core-shooting box die, particularly relates to whole core-shooting box die for central guide frame of side rack of railway vehicle.A kind of whole core-shooting box die for central guide frame of side rack of railway vehicle as disclosed in the patent No. Chinese utility model patent " a kind of whole core-shooting box die for central guide frame of side rack of railway vehicle " that is ZL200920308283.0 (Granted publication number for CN201470833U).Comprise framed group, core box, penetrate sand plate, air blowing plate and core ejection mechanism, core box body comprise loosing core in upper and lower core box, left and right and after loose core, the front side of upper and lower core box is directly connected, lower core box is connected with framed, its inner chamber is provided with one and empties piece, the upside of upper core box on corresponding station respectively correspondence be provided with and penetrate sand plate and air blowing plate, penetrate on sand plate and air blowing plate, be respectively equipped with penetrate sand mouth and blowing nozzle and with upper core box on to penetrate sand blast gas port suitable.
Existing core-shooting box die equipment is less in the selection of the direction of loosing core, generally can only provide and loose core in former and later two directions simultaneously, Core-pulling force can not be provided on left and right directions, loose core as realized in other (left and right) directions and need auxiliary the loosing core of extra installation oil cylinder.Realizing at other (forming left and right) direction by oil cylinder looses core and has following defect: 1, oil cylinder is large in expense, also need be connected and installed device at Design of Dies, as increase oil cylinder installing frame, increase the design difficulty of mould, increase design cost, strengthen mold weight, thus waste mould manufactured materials; 2, core-pulling mechanism and folding mode structure are completely independent, this will cause oil cylinder asynchronous with the appearance of loosing core in die sinking process, causes mould to damage, and oil cylinder leakage of oil causes the Core-pulling force that oil cylinder provides to reduce, cause core-pulling mechanism to extract out smoothly, thereby lose time; 3, provide when loose core of oil cylinder core-pulling force to be difficult for consistent, cause the speed of loosing core inconsistent, the as easy as rolling off a log side core bursting that will also not complete the action of loosing core of core ejection mechanism; 4, oil cylinder can cause cylinder seal poor in long-time use, causes leakage of oil, and greasy dirt enters sand shot machine, thereby affects the total quality of core; 5, auxiliary cylinder device dismounting and change inconvenience; 6, auxiliary cylinder can be subject to very large environment reason, causes precise decreasing, operates insensitively, loses time.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of link gear of taking out plunger tip and folding mould for core-shooting box die for above-mentioned prior art present situation, plunger tip will be taken out by this mechanism and folding mould organically combines, only need the oil cylinder of using while adopting folding mould as driving source, realize simultaneously and take out plunger tip action, and ensure to take out the plunger tip action uniformity good with folding mould, simplify mould structure, lower die manufacturing cost.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of link gear of taking out plunger tip and folding mould for core-shooting box die, comprise frame, upper core box, lower core box, plunger tip bar, and constrain on lower core box can before and after slippage after loose core and loosing core in a left side that can left and right slippage and looses core in the right side, lower core box is arranged on the lower mold holder of frame, it is characterized in that: also comprise the push pedal of the below of being located at described lower mold holder, push pedal can be moved up and down by oil cylinder pushing, and the lower end of described plunger tip bar is fixed in push pedal, the guide rod that two parallel interval arrange, each guide rod constrains in frame and the upper and lower slippage of frame relatively, and the lower end of described each guide rod is fixed in push pedal, and described upper core box is fixed on guide rod and with guide rod and moves up and down, in order to a left side loose core the left push rod that is connected, with the right right push rod that is connected of loosing core, with after the rear push-rod of loosing core and being connected, left push rod and right push rod constrain on lower mold holder and energy left and right slippage, rear push-rod constrains on lower mold holder and slippage before and after energy, on left push rod, be arranged with and make left push rod keep the outer left spring that moves trend, on right push rod, be arranged with and make right push rod keep the outer right spring that moves trend, on rear push-rod, be arranged with and make rear push-rod keep outer rear spring of moving trend, rotation is arranged on the left driving cam on lower mold holder, right driving cam and rear drive cam, the outer end of described left push rod and the side face of left driving cam are conflicted, the outer end of described right push rod and the side face of right driving cam are conflicted, the outer end of described rear push-rod and the side face of rear drive cam are conflicted, and be connected by first connecting rod between described left driving cam and rear drive cam, between described right driving cam and rear drive cam, be connected by second connecting rod, so that synchronously deflection of each driving cam, and a high position for each driving cam or low level side face are all synchronously contacted with each push rod, between push pedal and rear drive cam, be connected by drive mechanism, this drive mechanism can make the slippage up and down of push pedal drive rear drive cam rotation.
Above-mentioned drive mechanism comprises the driving gear on the power transmission shaft that is arranged on rear drive cam; Be fixed on the drive plate in push pedal; Constrain under frame can left and right slippage sliding rack, between drive plate and the back side of sliding rack, connect by muscle groove fit structure, this muscle groove fit structure can make moving up and down of drive plate drive the slippage of sliding rack left and right; The power transmission shaft of rotating support below lower mold holder, is fixed with the first driven gear and the second driven gear on this power transmission shaft, wherein the first driven gear is combined with driving gear, and the second driven gear engages with the bar shaped tooth portion transmission on described sliding rack.It is few that this drive mechanism relates to parts, and each parts is simple in structure, is convenient to manufacture and assembling.
On above-mentioned lower mold holder, be fixed with left mounting blocks, right mounting blocks and rear mounting blocks, described left push rod activity is located on left mounting blocks, and right push rod activity is located on right mounting blocks, and rear push-rod activity is located on rear mounting blocks; On left push rod, be fixed with left baffle ring, the two ends of described left spring are supported on respectively between left mounting blocks and left baffle ring, on right push rod, be fixed with right baffle ring, the two ends of described right spring are supported on respectively between right mounting blocks and right baffle ring, on rear push-rod, be fixed with rear baffle ring, the two ends of described rear spring are supported on respectively between rear mounting blocks and rear baffle ring.This structure not only provides suitable installation position to each push rod, ensures that again spring applies outside elastic force to each push rod simultaneously, ensures respectively to loose core and normally loose core.
Above-mentioned muscle groove fit structure comprises and is arranged on the convex tendon being obliquely installed on drive plate front end face from top to bottom, and is arranged on the chute that the sliding rack back side is obliquely installed, and described convex tendon is positioned at chute.Certainly muscle groove position can exchange.
The two spaced sliding rails in left and right are fixed in above-mentioned frame below, have guide groove on sliding rail, and the two ends of described sliding rack constrain in respectively in the guide groove of two sliding rails, and described drive plate is between two sliding rails.This structure is guaranteed only left and right slippage of sliding rack.
Above-mentioned sliding rack two ends are provided with roller, and one of them roller is positioned at the guide groove of one of them sliding rail, and another roller is positioned at the guide groove of another sliding rail.Between roller and guide groove, be rolling friction, make sliding rack slippage more smooth and easy, be not prone to tooth bar screens phenomenon.
Above-mentioned guide rod is provided with between the upper and lower every arranging in order to retrain the spacing shaft shoulder of upper core box.
Compared with prior art, the utility model has the advantage of: respectively loose core and the driving element such as hydraulic cylinder that folding mould is required for saving to drive, simplify mould structure and electric control system, this link gear only uses a hydraulic cylinder as driving element, to loose core, plunger tip and die sinking action accomplishs without any letup, the quantity of having saved hydraulic cylinder, has reduced energy consumption, has simplified electrical control; Also make in addition folding mold process and the process of loosing core keep the uniformity of height, be difficult for mold damage.
Brief description of the drawings
Fig. 1 is the perspective view one of the utility model embodiment;
Fig. 2 is the perspective view two of the utility model embodiment;
Fig. 3 is that the utility model embodiment removes the perspective view after drive mechanism;
Fig. 4 is the perspective view one of sliding rack in the utility model embodiment;
Fig. 5 is the perspective view two of sliding rack in the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Fig. 1～5, it is a preferred embodiment of the present utility model.
A kind of link gear of taking out plunger tip and folding mould for core-shooting box die, comprise frame 1, upper core box, lower core box, plunger tip bar 2, and constrain on lower core box can before and after slippage after loose core and loosing core in a left side that can left and right slippage and looses core in the right side, lower core box is arranged on the lower mold holder 11 of frame 1; Loosing core in upper core box, lower core box, a left side and looses core in the right side is prior art, and for making drawing more can express clearly this link gear, loosing core in upper core box, lower core box, a left side and looses core in the right side does not show in drawing, and frame is only also schematic diagram in addition.
Also comprise the push pedal 3 of being located at described lower mold holder 11 belows, push pedal 3 is promoted and can be moved up and down by oil cylinder 4, and the lower end of plunger tip bar 2 is fixed in push pedal 3.
The guide rod 5 that two parallel interval arrange, each guide rod 5 constrains in frame 1 and frame slippage Shang Xia 1 relatively, the lower end of each guide rod 5 is fixed in push pedal 3, and upper core box is fixed on guide rod 5 and with guide rod 5 and moves up and down, and guide rod 5 is provided with between the upper and lower every arranging in order to retrain the spacing shaft shoulder 51 of upper core box.
In order to a left side loose core the left push rod 6a that is connected, with the right right push rod 6b that is connected of loosing core, with after the rear push-rod 6c of loosing core and being connected, left push rod 6a and right push rod 6b constrain on lower mold holder 11 and energy left and right slippage, rear push-rod 6c constrains on lower mold holder 11 and slippage before and after energy, on left push rod 6a, be arranged with and make left push rod 6a keep the outer left spring 61 that moves trend, on right push rod 6b, be arranged with and make right push rod 6b keep the outer right spring 62 that moves trend, on rear push-rod 6c, be arranged with and make rear push-rod 6c keep outer rear spring 63 of moving trend.
On lower mold holder 11, be fixed with left mounting blocks 15a, right mounting blocks 15b and rear mounting blocks 15c, it is upper that left push rod 6a activity is located in left mounting blocks 15a, and it is upper that right push rod 6b activity is located in right mounting blocks 15b, and rear push-rod 6c activity is located on rear mounting blocks 15c; On left push rod 6a, be fixed with left baffle ring 16a, the two ends of left spring 61 are supported on respectively between left mounting blocks 15a and left baffle ring 16a, on right push rod 62, be fixed with right baffle ring 16b, the two ends of right spring 62 are supported on respectively between right mounting blocks 15b and right baffle ring 16b, on rear push-rod 63, be fixed with rear baffle ring 16c, the two ends of rear spring 63 are supported on respectively between rear mounting blocks 15c and rear baffle ring 16c.
Rotation is arranged on the left driving cam 7a on lower mold holder 11, right driving cam 7b and rear drive cam 7c, the side face of the outer end of left push rod 6a and left driving cam 7a is conflicted, the side face of the outer end of right push rod 6b and right driving cam 7b is conflicted, the side face of the outer end of rear push-rod 6c and rear drive cam 7c is conflicted, and be connected by first connecting rod 8a between left driving cam 7a and rear drive cam 7c, between right driving cam 7b and rear drive cam 7c, be connected by second connecting rod 8b, it is upper that first connecting rod 8a and second connecting rod 8b are coaxially hinged on rear drive cam 7c, and the pin joint of first connecting rod 8a and second connecting rod 8b and each driving cam 7a, 7b, pivot distance and the relevant position of 7c are all identical, so that each driving cam 7a, 7b, synchronously deflection of 7c, and make each driving cam 7a, 7b, a high position of 7c or low level side face be synchronous and each push rod 6a all, 6b, 6c contact, each like this driving cam 7a, 7b, the each push rod 6a of the synchronous promotion of 7c, 6b, the synchronous drive of 6c moves or moves outward in respectively loosing core synchronously.
Be located between push pedal 3 and rear drive cam 7c and be connected by drive mechanism, this drive mechanism can make the slippage up and down of push pedal 3 drive rear drive cam 7c rotation.
Drive mechanism comprises the driving gear 72 on the power transmission shaft 71 that is arranged on rear drive cam 7c.
Be fixed on the drive plate 9 in push pedal 3.
Constrain in the sliding rack 10 that frame 1 time can left and right slippage, between drive plate 9 and the back side of sliding rack 10, connect by muscle groove fit structure, this muscle groove fit structure can make moving up and down of drive plate 9 drive sliding rack 10 left and right slippages; Muscle groove fit structure comprises and is arranged on the convex tendon 91 being obliquely installed on drive plate 9 front end faces from top to bottom, and is arranged on the chute 101 that sliding rack 10 back sides are obliquely installed, and convex tendon 91 is positioned at chute 101.
The power transmission shaft 12 of rotating support below lower mold holder 11, on this power transmission shaft 12, be fixed with the first driven gear 13 and the second driven gear 14, wherein the first driven gear 13 and driving gear 72 combinations, the second driven gear 14 engages with the bar shaped tooth portion transmission on sliding rack 10.
The two spaced sliding rails 17 in left and right are fixed in frame 1 below, have guide groove 171 on sliding rail 17, and the two ends of sliding rack 10 constrain in respectively in the guide groove 171 of two sliding rails, and drive plate 9 is between two sliding rails 17.Sliding rack 10 two ends are provided with roller 18, and one of them roller 18 is positioned at the guide groove 171 of one of them sliding rail, and another roller 18 is positioned at the guide groove 171 of another sliding rail.
Operation principle of the present utility model and process are as follows:
When matched moulds, drive push pedal 3 to move down as the hydraulic cylinder 4 that drives original paper, plunger tip bar 2, guide rod 5 and all moving down with the fixing drive plate 9 of push pedal 3, because upper core box is fixed on guide rod 5, therefore upper core box also moves down matched moulds thereupon, under the effect of the muscle groove fit structure between drive plate 9 and the back side of sliding rack 10, band carry-over bar moves to right, at the first driven gear 13, under the gearing of the second driven gear 14 and driving gear 72, drive rear drive cam 7c to be rotated counterclockwise overlooking under state, at this moment each push rod 6a, 6b, 6c and each driving cam 7a, 7b, the high-order side face contact of 7c, each push rod 6a, 6b, 6c is at each driving cam 7a, 7b, under the promotion of 7c, overcome each spring 61, 62, in 63 effect, move, with each push rod 6a, 6b, in what 6c was fixing loose core also, move, complete matched moulds.
When die sinking, drive in push pedal 3 and move as the hydraulic cylinder 4 that drives original paper, plunger tip bar 2, guide rod 5 and moving on all with the fixing drive plate 9 of push pedal 3, because upper core box is fixed on guide rod 5, therefore upper core box also with on remove mould, under the effect of the muscle groove fit structure between drive plate 9 and the back side of sliding rack 10, band carry-over bar moves to left, at the first driven gear 13, under the gearing of the second driven gear 14 and driving gear 72, drive rear drive cam 7c to turn clockwise overlooking under state, at this moment each push rod 6a, 6b, 6c and each driving cam 7a, 7b, the low level side face contact of 7c, each push rod 6a, 6b, 6c is at spring 61 separately, 62, 63 lower outside the moving of elastic force effect, with each push rod 6a, 6b, what 6c was fixing loose core also outer moving, complete die sinking, plunger tip bar 2 ejects finished product core from the die cavity of lower core box simultaneously.
Claims (7)
1. the link gear of taking out plunger tip and folding mould for core-shooting box die, comprise frame (1), upper core box, lower core box, plunger tip bar (2), and constrain on lower core box can before and after slippage after loose core and loosing core in a left side that can left and right slippage and looses core in the right side, lower core box is arranged on the lower mold holder (11) of frame (1); It is characterized in that: also comprise
Be located at the push pedal (3) of described lower mold holder (11) below, push pedal (3) is promoted and can be moved up and down by oil cylinder (4), and the lower end of described plunger tip bar (2) is fixed in push pedal (3);
The guide rod (5) that two parallel interval arrange, each guide rod (5) constrains in the upper also upper and lower slippage of frame (1) relatively of frame (1), it is upper that the lower end of described each guide rod (5) is fixed on push pedal (3), and described upper core box is fixed on guide rod (5) above and moves up and down with guide rod (5);
In order to a left side left push rod (6a) being connected of loosing core, with the right side right push rod (6b) being connected of loosing core, with after the rear push-rod (6c) of loosing core and being connected, left push rod (6a) and right push rod (6b) constrain in the left and right slippage of the upper also energy of lower mold holder (11), rear push-rod (6c) constrains in the front and back slippage of the upper also energy of lower mold holder (11), on left push rod (6a), be arranged with and make left push rod (6a) keep the outer left spring (61) that moves trend, on right push rod (6b), be arranged with and make right push rod (6b) keep the outer right spring (62) that moves trend, on rear push-rod (6c), be arranged with and make rear push-rod (6c) keep outer rear spring (63) of moving trend,
Rotation is arranged on the left driving cam (7a) on lower mold holder (11), right driving cam (7b) and rear drive cam (7c), the side face of the outer end of described left push rod (6a) and left driving cam (7a) is conflicted, the side face of the outer end of described right push rod (6b) and right driving cam (7b) is conflicted, the side face of the outer end of described rear push-rod (6c) and rear drive cam (7c) is conflicted, and be connected by first connecting rod (8a) between described left driving cam (7a) and rear drive cam (7c), between described right driving cam (7b) and rear drive cam (7c), be connected by second connecting rod (8b), so that each driving cam (7a, 7b, 7c) synchronously deflection, and make each driving cam (7a, 7b, high position 7c) or low level side face be synchronous and each push rod (6a all, 6b, 6c) contact,
Between push pedal (3) and rear drive cam (7c), be connected by drive mechanism, this drive mechanism can make the slippage up and down of push pedal (3) drive rear drive cam (7c) rotation.
2. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 1, is characterized in that: described drive mechanism comprises
Be arranged on the driving gear (72) on the power transmission shaft (71) of rear drive cam (7c);
Be fixed on the drive plate (9) in push pedal (3);
Constrain under frame (1) can left and right slippage sliding rack (10), between the back side of drive plate (9) and sliding rack (10), connect by muscle groove fit structure, this muscle groove fit structure can make moving up and down of drive plate (9) drive sliding rack (10) left and right slippage;
Rotating support is at the power transmission shaft (12) of lower mold holder (11) below, on this power transmission shaft (12), be fixed with the first driven gear (13) and the second driven gear (14), wherein the first driven gear (13) and driving gear (72) combination, the second driven gear (14) engages with the bar shaped tooth portion transmission on described sliding rack (10).
3. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 2, it is characterized in that: on described lower mold holder (11), be fixed with left mounting blocks (15a), right mounting blocks (15b) and rear mounting blocks (15c), described left push rod (6a) activity is located on left mounting blocks (15a), it is upper that right push rod (6b) activity is located in right mounting blocks (15b), and rear push-rod (6c) activity is located on rear mounting blocks (15c); On left push rod (6a), be fixed with left baffle ring (16a), the two ends of described left spring (61) are supported on respectively between left mounting blocks (15a) and left baffle ring (16a), on right push rod (62), be fixed with right baffle ring (16b), the two ends of described right spring (62) are supported on respectively between right mounting blocks (15b) and right baffle ring (16b), on rear push-rod (63), be fixed with rear baffle ring (16c), the two ends of described rear spring (63) are supported on respectively between rear mounting blocks (15c) and rear baffle ring (16c).
4. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 2, it is characterized in that: described muscle groove fit structure comprises and is arranged on the convex tendon (91) being obliquely installed on drive plate (9) front end face from top to bottom, and being arranged on the chute (101) that sliding rack (10) back side is obliquely installed, described convex tendon (91) is positioned at chute (101).
5. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 2, it is characterized in that: the two spaced sliding rails in left and right (17) are fixed in described frame (1) below, on sliding rail (17), have guide groove (171), the two ends of described sliding rack (10) constrain in respectively in the guide groove (171) of two sliding rails, and described drive plate (9) is positioned between two sliding rails (17).
6. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 2, it is characterized in that: described sliding rack (10) two ends are provided with roller (18), one of them roller (18) is positioned at the guide groove (171) of one of them sliding rail, and another roller (18) is positioned at the guide groove (171) of another sliding rail.
7. the link gear of taking out plunger tip and folding mould for core-shooting box die according to claim 1, is characterized in that: described guide rod (5) is provided with between the upper and lower every arranging in order to retrain the spacing shaft shoulder (51) of upper core box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420168402.8U CN203936324U (en) | 2014-04-08 | 2014-04-08 | For the link gear of taking out plunger tip and folding mould of core-shooting box die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420168402.8U CN203936324U (en) | 2014-04-08 | 2014-04-08 | For the link gear of taking out plunger tip and folding mould of core-shooting box die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203936324U true CN203936324U (en) | 2014-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420168402.8U Withdrawn - After Issue CN203936324U (en) | 2014-04-08 | 2014-04-08 | For the link gear of taking out plunger tip and folding mould of core-shooting box die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203936324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949582A (en) * | 2014-04-08 | 2014-07-30 | 宁波全力机械模具有限公司 | Linkage mechanism for core pulling and ejecting and die opening and closing of core shooting box die |
-
2014
- 2014-04-08 CN CN201420168402.8U patent/CN203936324U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949582A (en) * | 2014-04-08 | 2014-07-30 | 宁波全力机械模具有限公司 | Linkage mechanism for core pulling and ejecting and die opening and closing of core shooting box die |
| CN103949582B (en) * | 2014-04-08 | 2016-02-10 | 宁波全力机械模具有限公司 | For the link gear taking out plunger tip and folding mould of core-shooting box die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141112 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |