CN203664625U - Outdoor illumination lamp aluminum alloy die-casting die - Google Patents
Outdoor illumination lamp aluminum alloy die-casting die Download PDFInfo
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- CN203664625U CN203664625U CN201420007256.0U CN201420007256U CN203664625U CN 203664625 U CN203664625 U CN 203664625U CN 201420007256 U CN201420007256 U CN 201420007256U CN 203664625 U CN203664625 U CN 203664625U
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- core
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- angled
- sliding block
- lift splits
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Abstract
The utility model discloses an outdoor illumination lamp aluminum alloy die-casting die which comprises an upper die body and a lower die body. The lower die body comprises a lower die plate provided with a cavity and a fixed bottom plate located at the bottommost of the lower die body. The parting surface of the lower die plate is provided with a sliding block groove penetrating through the cavity, the cross section of the sliding block groove is U-shaped, the side face, away from the cavity, of the sliding block is inclined outward from bottom to top to form a locking surface, an inclined block provided with a lateral workpiece forming surface is arranged in the sliding block groove in a matched mode, the attachment portions of the two sides of the sliding block groove and the inclined sliding block are provided with round guide holes inclining outward from bottom to top in a joint mode, the round guide holes are connected with the lower die plate and the inclined sliding block in a crossing mode, cylindrical guide rails matched with the round guide holes are disposed in the round guide holes, and the bottom face of the sliding block groove is further provided with an ejector rod used for ejecting the inclined sliding block. A loose core structure of the inclined sliding block is convenient to machine and manufacture, machining precision is high, a mold core is convenient to replace while the die is not damaged, and production efficiency of the die is remarkably improved.
Description
Technical field
The utility model relates to technical field of mold, especially relates to a kind of aluminum alloy die-casting die in order to moulding outdoor illuminating lamp.
Background technology
Existing aluminum alloy die-casting die generally includes the patrix with die cavity and the counterdie with convex module, when work, upper die and lower die are combined mutually, gap between die cavity and convex module forms the cavity of moulding, liquid aluminium alloy is entered into after cooling in cavity and is become desired die casting by running gate system, finally by the ejecting mechanism of being located at counterdie, die casting is ejected, complete one-shot forming process.In the time thering is sidewise hole, groove etc. on product, need to arrange the core-pulling mechanism of side direction, before upper and lower mould parting, core-pulling mechanism first moves extracts the moulding mold insert of sidewise hole, groove out, then upper and lower mould parting, ejecting mechanism ejects workpiece.Common core-pulling mechanism is by fluid pressure type and mechanical type, and that fluid pressure type has is simple in structure, be easy to the feature controlled, but exists the problem that appearance and size is large, clamp force is little, is not therefore suitable for and has the side core-pulling of larger side to shaping area.Mechanical type core-pulling mechanism common are Angle Pin loose core and angled-lift splits loose core, Angle Pin is loosed core and is had feature simple in structure, to be easy to processing, but when work, Angle Pin was subject to larger lateral thrust power, thereby Angle Pin easily ruptures because of tired, and Core-pulling force is restricted.Angled-lift splits is loosed core and is applicable to the mould that has the die cavity of moulding on counterdie, need to carry out side core-pulling simultaneously, its general principle is that an angled-lift splits is set on counterdie, the inner side of angled-lift splits has workpiece side to forming surface, for the side of shaping workpiece, progressively outward-dipping slide rail is set from the bottom to top between the both sides of angled-lift splits and counterdie, and the bottom surface of angled-lift splits arranges corresponding push rod.When after Workpiece shaping, ejecting mechanism action progressively upwards ejects workpiece, meanwhile, angled-lift splits is also promoted to move up in company with workpiece by push rod, the effect of slide rail of tilting due to angled-lift splits both sides, angled-lift splits left transverse shifting laterally progressively in moving up, thus be progressively separated with workpiece.In the time of upper and lower mould matched moulds, patrix promotes angled-lift splits and moves down reset along the recurrence of tilting.In the prior art, the structure of angled-lift splits is as shown in Figure of description 1, and the slide rail of its both sides is rectangular, and be arranged on integratedly the both sides of angled-lift splits, correspondingly, the slide block slot of accommodating angled-lift splits is set on counterdie, the tip chute with slide rail adaptation is set in the both sides of slide block slot simultaneously.Because the chute lower end tilting is obstructed, therefore add man-hour by conventional machined means more difficult, and its machining accuracy is difficult to ensure.
In addition, for the product on product with longitudinal hole, corresponding core is normally set on the convex module of counterdie, the upper surface of core and the laminating of the cavity surface of patrix when moulding, thus on workpiece, form corresponding through hole.Because the diameter of core is generally thinner, when moulding, the liquid aluminium alloy of HTHP can form larger impact to core, therefore very easily because stressed bending is even ruptured, now needs to change core one and maintains normal production.Because core in prior art is normally fixed on the core fixing hole on convex module, and extract from convex module for fear of core, need to defining flange be set at the root of core, correspondingly, in the core fixing hole bottom of convex module, counterbore is set.Although easy to process, fixing reliable advantage that said structure has, but breaking down need to change time, need first will remove fixed base plate and the ejecting mechanism of counterdie, then from counterdie, split out convex module, finally could take out core from convex module and be changed, then again convex module etc. be ressembled back.Not only workload is large, and impact is normally produced, and is repeatedly keeping in repair after dismounting, can increase the fit clearance between convex module and counterdie, and mould is damaged, thereby makes the product after moulding occur " overlap ".For example, a kind of disclosed in Chinese patent literature " die-casting die of lockset panel ", publication No. is CN102527990A, comprise framed, the framed groove that is provided with, is provided with cultivation plate in framed groove, plant in plate and be provided with core through hole is installed, plant plate and be provided with stripper plate outward, in stripper plate, be also provided with the through hole corresponding with planting plate, and stripper plate is consistent with the profile of planting plate, and two inner via hole shapes are also consistent, core inserts stripper plate and plants in the inner via hole of plate, and with through hole close-fitting.The framed core rod that can join several different model products of this invention, does not framedly need integral replacing, thereby is conducive to reduce costs, but exist equally in the time changing core, workload is large, the easy problem of mold damage.
Utility model content
An object of the present utility model is that the existing processing difficulties of angled-lift splits pulled core structure, the machining accuracy that solve existing aluminum alloy die-casting die are difficult to the problem ensureing, a kind of outdoor illuminating lamp aluminum alloy die-casting die is provided, its angled-lift splits pulled core structure has the processing and manufacturing of convenience, and machining accuracy is high.
The problem of the large and easy mold damage of workload when another object of the present utility model is to solve the existing replacing core of existing aluminum alloy die-casting die, a kind of outdoor illuminating lamp aluminum alloy die-casting die is provided, it is convenient for changing core, can mold damage.
To achieve these goals, the utility model is by the following technical solutions: a kind of outdoor illuminating lamp aluminum alloy die-casting die, comprise patrix, counterdie, described counterdie comprises the lower bolster that is provided with die cavity, and be positioned at the fixed base plate of counterdie bottommost, on the die joint of lower bolster, be provided with the slide block slot that connects die cavity, the cross section of slide block slot takes the shape of the letter U, thereby slide block slot is away from the side outward-dipping formation locking face from the bottom to top of die cavity, in slide block slot, adaptive one has the angled-lift splits of workpiece side to forming surface, both sides and angled-lift splits joint place at slide block slot arrange from the bottom to top respectively outward-dipping guiding circular hole the junction of the edges of two sheets of paper, guiding circular hole cross-over connection lower bolster and angled-lift splits, in guiding circular hole, be provided with the cylindrical slideway with the circular hole adaptation that leads, bottom surface at slide block slot is also provided with the push rod for ejecting angled-lift splits.
After Workpiece shaping, ejecting mechanism action, now, being positioned at push rod below angled-lift splits promotes angled-lift splits and moves together in company with workpiece, due to the guide effect of the outward-dipping cylindrical slideway in slide block slot both sides, angled-lift splits now also can do laterally horizontal movement in vertically moving in company with workpiece, thereby realizes side core-pulling.Guiding circular hole of the present utility model is connected across between lower bolster and angled-lift splits, like this, in the time of Mould Machining, can first angled-lift splits be put into slide block slot compresses, now can be easily process the guiding circular hole of an inclination with drill bit and reamer in the both sides of slide block slot and angled-lift splits joint place, then in guiding circular hole, placing car is whittled into the cylindrical slideway of type, that is to say, in prior art, has become simple brill, hinge and Vehicle Processing for the complicated processing of slide rail and tip chute.In addition,, because the slide rail of one is not established in angled-lift splits both sides, therefore also facilitate its Milling Process.Thereby simplified processing process significantly, reduces manufacturing cost.Further, the angled-lift splits of prior art is because the slide rail of both sides is integrally manufactured, therefore, in the time that angled-lift splits uses between aft ramp and tip chute because of wearing and tearing excesssive gap for a long time, can only integrally change angled-lift splits.And there are wearing and tearing between guiding circular hole and cylindrical slideway time in the utility model, can ream to guiding circular hole, then change a slightly large cylindrical slideway of diameter can make angled-lift splits again keep good state, thereby can reduce significantly maintenance cost.
As preferably, be positioned at guiding circular hole part on lower bolster and cylindrical slideway the joint place junction of the edges of two sheets of paper be provided with sunk screw.
Like this, can make cylindrical slideway be fixed on reliably slide block slot one side, while avoiding angled-lift splits action, be taken out of together.Add man-hour, can first cylindrical slideway be inserted in guiding circular hole, then on the die joint of lower bolster, directly process the guiding circular hole of cross-over connection slide block slot one side and the sunk screw hole of cylindrical slideway, and be screwed into sunk screw, thereby be conducive to simplify the fixed structure of cylindrical slideway.
As preferably, the bottom surface of described slide block slot is provided with groove, and the upper end of push rod is hinged with the pushing block that is positioned at groove, and the upper surface of pushing block and angled-lift splits laminating is provided with latticed oil storage tank.
Pushing block is set in the upper end of push rod and can increases and the contact area of angled-lift splits bottom surface, to reduce wearing and tearing between the two, latticed oil storage tank can store lubricant grease, the side-friction resistance while ejecting to reduce angled-lift splits.Particularly, push rod and pushing block are hinged, thereby pushing block can freely be rotated in the end of push rod, thereby guarantee the complete laminating of pushing block and angled-lift splits bottom surface.
As preferably, the angle of inclination of described locking face is greater than the angle of inclination of the circular hole that leads, and like this, in the time that push rod promotes angled-lift splits action, can avoid occurring the locked angled-lift splits of angle of inclination error because of locking face, thereby can reduce the accuracy of manufacture and the cost of locking face.
As preferably, the die cavity of described counterdie is provided with the core fixing hole that is through to fixed base plate bottom surface, core fixing hole is provided with threaded counterbore at the openend of fixed base plate bottom surface, in core fixing hole, be provided with the core that moulding is used, be provided with the position limiting convex ring that is positioned at counterbore at the root of core, counterbore internal thread is connected with the plug of butt position limiting convex ring bottom surface.
Core of the present utility model is to be fixed on the fixed base plate of counterdie bottommost, like this, when installation, can directly insert from the core fixing hole of fixed base plate bottom surface, then with plug shutoff.And need repairing while replacing, can from the core fixing hole of fixed base plate, extract easily, thereby avoid whole counterdie dismounting, improve widely the efficiency of installing and keeping in repair, be conducive to boost productivity.
As preferably, described position limiting convex ring comprises the stop nut that is set in the spacing shim of core root and is laminated on spacing shim outer surface and is threaded with core, the root end face of core is provided with the anti-rotation draw-in groove that connects periphery, and the endoporus of spacing shim is provided with the positive stop strip with anti-rotation draw-in groove adaptation.
In the prior art, the position limiting convex ring of core root is all generally by the mode of core root jumping-up is made into integration, to save material simplified processing process.But jumping-up processing belongs to plastic working technique, need on the one hand special cold headers, the position limiting convex ring tensile strength of being come by jumping-up is on the other hand low, and easily ruptures between core.Particularly, the core length processing is difficult to change, and for reducing the model specification of core spare part so that produce, is generally to prepare spare part by longer core length specification, presses the new end of physical length cutting row when use again, thereby causes the waste of material.Core of the present utility model and position limiting convex ring adopt fabricated structure, position limiting convex ring completes by assembling mode, the positive stop strip of spacing shim is stuck in anti-rotation draw-in groove, play on the one hand axial limiting effect, can avoid on the other hand rotating, stop nut is close to the position limiting convex ring of spacing shim with complete, avoids the loosening of stop nut simultaneously.Particularly, spare part can be made wire rod by diameter, and prepares corresponding spacing shim and stop nut, need to use time, by physical length cutting length of wire, and cut anti-rotation draw-in groove in one end-grain cutting, then mounting limit pad and stop nut can form core, effectively to reduce the waste of material.
Therefore, angled-lift splits pulled core structure of the present utility model facilitates processing and manufacturing, and machining accuracy is high, simultaneously core change convenient, can mold damage, thus improve significantly the production efficiency of mould.
Brief description of the drawings
Fig. 1 is a kind of structural representation of this practical core.
Fig. 2 is that lower bolster is at the partial schematic diagram that angled-lift splits place is set.
Fig. 3 is the decomposition texture schematic diagram of Fig. 2.
Fig. 4 is the enlarged drawing at A place in Fig. 1.
Fig. 5 is the enlarged drawing at B place in Fig. 1.
Fig. 6 is a kind of decomposition texture schematic diagram of core root.
In figure: 1, patrix, 11, die cavity, 12, die joint, 2, counterdie, 21, slide block slot, 211, locking face, 212, groove, 24, lower bolster, 25, fixed base plate, 26, core fixing hole, 27, core, 271, position limiting convex ring, 272, anti-rotation draw-in groove, 273, spacing shim, 274, stop nut, 275, positive stop strip, 28, plug, 3, angled-lift splits, 31, workpiece side is to forming surface, 4, guiding circular hole, 5, cylindrical slideway, 6, push rod, 61, pushing block, 7, sunk screw.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is further described.
As shown in Figure 1, a kind of outdoor illuminating lamp aluminum alloy die-casting die, comprise patrix 1, counterdie 2 and by being arranged on the guide pin bushing of patrix and being arranged on the guiding-positioning structure (not shown) that the guide pillar of counterdie forms, counterdie comprises the lower bolster 24 that is provided with die cavity 11 and the fixed base plate 25 that is positioned at counterdie bottommost, is provided with the slide block slot 21 that connects die cavity on the die joint 12 of lower bolster.As shown in Figure 2 and Figure 3, the cross section of this slide block slot takes the shape of the letter U, thus the interior side outward-dipping formation locking face 211 from the bottom to top away from die cavity of slide block slot.In addition, in slide block slot, an adaptive angled-lift splits 3 for side core-pulling, has workpiece side to forming surface 31 near die cavity one side on angled-lift splits.In addition, an outward-dipping guiding circular hole 4 is from the bottom to top set respectively in the both sides of slide block slot and angled-lift splits joint place the junction of the edges of two sheets of paper, this guiding circular hole cross-over connection lower bolster and angled-lift splits, thus a part for the circular hole that makes to lead is formed on lower bolster, and another part is formed on angled-lift splits.In guiding circular hole, arrange and the cylindrical slideway 5 of circular hole adaptation that leads, and be provided for ejecting the push rod 6 of angled-lift splits in the bottom surface of slide block slot.
Like this, after Workpiece shaping, ejecting mechanism action, now, be positioned at push rod below angled-lift splits and can promote angled-lift splits and vertically move together in company with workpiece, meanwhile, angled-lift splits outwards does horizontal movement under the guide effect of the outward-dipping cylindrical slideway in slide block slot both sides, thereby the workpiece side on angled-lift splits is separated, to complete the side core-pulling of angled-lift splits to forming surface and workpiece.
For fear of the cylindrical slideway circular hole of deviating to lead, we can arrange the sunk screw hole of guiding circular hole and the cylindrical slideway of cross-over connection lower bolster one side on the die joint of lower bolster, that is to say, be arranged on the joint place that guiding circular hole is positioned at part on lower bolster and cylindrical slideway this sunk screw hole junction of the edges of two sheets of paper, then in sunk screw hole, be screwed into a sunk screw 7, to cylindrical slideway is fixed on to slide block slot one side.Preferably, we are positioned at lower bolster one side at can make the to lead axis of circular hole, that is to say, being formed on lower bolster is more than half guiding circular hole, like this, can avoid laterally deviating from the guiding circular hole of guide cylinder from lower bolster.And cylindrical slideway can be made into the inclined-plane flushing with counterdie die joint near the upper end of counterdie die joint, thereby be convenient to the processing in sunk screw hole.
Further, we also can arrange groove 212 in the bottom surface of slide block slot, and at the hinged pushing block 61 in the upper end of push rod, this pushing block is positioned at groove.Like this, push rod can promote angled-lift splits action by pushing block, effectively to increase and the contact area of angled-lift splits bottom surface.Meanwhile, also can latticed oil storage tank be set at the upper surface of pushing block and angled-lift splits laminating, and spread lubricant grease in latticed oil storage tank, thus side-friction resistance when reduction angled-lift splits ejects.
Be understandable that, the angle of inclination of circular hole if locking face leads because mismachining tolerance causes angle of inclination to be less than, when push rod promotes angled-lift splits when action, angled-lift splits cannot transverse shifting and occur deadlock phenomenon.Therefore, we need to make the angle of inclination of locking face be greater than to lead the angle of inclination of circular hole, and preferably, the angle of inclination of locking face can be greater than the angle of inclination 1-2 degree of the circular hole that leads.Like this, can effectively reduce the accuracy of manufacture and the processing cost of locking face, and avoid angled-lift splits to occur deadlock phenomenon.
Finally, as Figure 1 and Figure 4, we need to arrange multiple core fixing holes 26 on the die cavity of lower bolster, and this core fixing hole runs through lower bolster, ejecting mechanism until fixed base plate bottom surface arranges the core 27 that moulding is used in core fixing hole.Certainly, in order to improve the intensity of core, be convenient to the processing of core fixing hole simultaneously, we can make multidiameter by core, that is to say, core upper end is the less profiled section of diameter of making according to the forming hole size of workpiece, and remainder is the strengthening segment that diameter is larger, thereby the bulk strength of core and rigidity are significantly improved; Correspondingly, core fixing hole can be made into shoulder hole, and it is diameter and the section of cooperation of the forming part adaptation of core near die cavity one end, and remainder is the transmission section of the diameter strengthening segment of being a bit larger tham core.That is to say, core and core fixing hole just form matched in clearance at shorter profiled section, and leave gap between the strengthening segment that core is grown and the transmission section of core fixing hole, thereby can reduce the quality of fit requirement between core and core fixing hole, to reduce the requirement to machining accuracy.For fixing core, we can arrange counterbore in the openend of fixed base plate bottom surface one side at core fixed hole position, on the medial surface of counterbore, internal thread are set simultaneously.Meanwhile, core arranges a position limiting convex ring 271 that is positioned at counterbore at the root that is positioned at fixed base plate one side, with moving axially of restriction core, and connect the plug 28 of a butt position limiting convex ring bottom surface at counterbore internal thread, core can not deviate from from fixed base plate one side, preferably, plug can adopt existing interior hexagonal holding screw.Like this, in the time of die assembly, can first the other parts of mould be assembled, finally core directly be inserted from the core fixing hole of fixed base plate bottom surface, then make core fixing with plug shutoff.And need repairing while changing core, can pull down the plug of fixed base plate bottom surface, then from the core fixing hole of fixed base plate, extract easily core, thereby avoid whole counterdie to disassemble, improve widely the efficiency of installing and keeping in repair.
For the ease of the processing and manufacturing of core, core and position limiting convex ring can adopt fabricated structure, particularly, and as shown in Figure 5, Figure 6, we can arrange along the anti-rotation draw-in groove 272 of Axis Extension and perforation periphery at the root end face of core, at the lateral surface of core root, external screw thread are set simultaneously.Correspondingly, position limiting convex ring comprises a stop nut 274 that is set in the spacing shim 273 of core root and is laminated on spacing shim outer surface and is threaded with the external screw thread of core root, the positive stop strip 275 of setting and anti-rotation draw-in groove adaptation on the endoporus of spacing shim, these positive stop strip two ends are connected with the edge of spacing shim endoporus respectively.Anti-rotation draw-in groove can limit the axial advancement of spacing shim, and the stop nut that presses spacing shim makes spacing shim be fastened on core, thereby forms a dismountable position limiting convex ring.
Claims (6)
1. an outdoor illuminating lamp aluminum alloy die-casting die, comprise patrix, counterdie, described counterdie comprises the lower bolster that is provided with die cavity, and be positioned at the fixed base plate of counterdie bottommost, it is characterized in that, on the die joint of lower bolster, be provided with the slide block slot that connects die cavity, the cross section of slide block slot takes the shape of the letter U, thereby slide block slot is away from the side outward-dipping formation locking face from the bottom to top of die cavity, in slide block slot, adaptive one has the angled-lift splits of workpiece side to forming surface, both sides and angled-lift splits joint place at slide block slot arrange from the bottom to top respectively outward-dipping guiding circular hole the junction of the edges of two sheets of paper, guiding circular hole cross-over connection lower bolster and angled-lift splits, in guiding circular hole, be provided with the cylindrical slideway with the circular hole adaptation that leads, bottom surface at slide block slot is also provided with the push rod for ejecting angled-lift splits.
2. a kind of outdoor illuminating lamp aluminum alloy die-casting die according to claim 1, is characterized in that, be positioned at guiding circular hole part on lower bolster and cylindrical slideway the joint place junction of the edges of two sheets of paper be provided with sunk screw.
3. a kind of outdoor illuminating lamp aluminum alloy die-casting die according to claim 1, it is characterized in that, the bottom surface of described slide block slot is provided with groove, and the upper end of push rod is hinged with the pushing block that is positioned at groove, and the upper surface of pushing block and angled-lift splits laminating is provided with latticed oil storage tank.
4. a kind of outdoor illuminating lamp aluminum alloy die-casting die according to claim 1, is characterized in that, the angle of inclination of described locking face is greater than the angle of inclination of the circular hole that leads.
5. according to a kind of outdoor illuminating lamp aluminum alloy die-casting die described in claim 1 or 2 or 3 or 4, it is characterized in that, the die cavity of described counterdie is provided with the core fixing hole that is through to fixed base plate bottom surface, core fixing hole is provided with threaded counterbore at the openend of fixed base plate bottom surface, in core fixing hole, be provided with the core that moulding is used, be provided with the position limiting convex ring that is positioned at counterbore at the root of core, counterbore internal thread is connected with the plug of butt position limiting convex ring bottom surface.
6. a kind of outdoor illuminating lamp aluminum alloy die-casting die according to claim 5, it is characterized in that, described position limiting convex ring comprises the stop nut that is set in the spacing shim of core root and is laminated on spacing shim outer surface and is threaded with core, the root end face of core is provided with the anti-rotation draw-in groove that connects periphery, and the endoporus of spacing shim is provided with the positive stop strip with anti-rotation draw-in groove adaptation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007256.0U CN203664625U (en) | 2014-01-03 | 2014-01-03 | Outdoor illumination lamp aluminum alloy die-casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007256.0U CN203664625U (en) | 2014-01-03 | 2014-01-03 | Outdoor illumination lamp aluminum alloy die-casting die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203664625U true CN203664625U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420007256.0U Expired - Fee Related CN203664625U (en) | 2014-01-03 | 2014-01-03 | Outdoor illumination lamp aluminum alloy die-casting die |
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| CN (1) | CN203664625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247867A (en) * | 2021-12-29 | 2022-03-29 | 苏州海强机械有限公司 | Mould is used in production of slender axles class part |
-
2014
- 2014-01-03 CN CN201420007256.0U patent/CN203664625U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247867A (en) * | 2021-12-29 | 2022-03-29 | 苏州海强机械有限公司 | Mould is used in production of slender axles class part |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20180103 |