CN217315497U - Silent frequency converter stand plastic trimming die - Google Patents
Silent frequency converter stand plastic trimming die Download PDFInfo
- Publication number
- CN217315497U CN217315497U CN202221157516.3U CN202221157516U CN217315497U CN 217315497 U CN217315497 U CN 217315497U CN 202221157516 U CN202221157516 U CN 202221157516U CN 217315497 U CN217315497 U CN 217315497U
- Authority
- CN
- China
- Prior art keywords
- post
- frequency converter
- shaping
- die
- trimming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Punching Or Piercing (AREA)
Abstract
The utility model discloses a silent frequency converter stand reshaping trimming die, which comprises a positioning male die, a reshaping block, a plurality of trimming inserts, an upper die frame and a lower die frame, wherein the positioning male die is arranged on the lower die frame; one end of the guide limiting structure is connected with the force transmission plate, and the other end of the guide limiting structure is fixedly connected with the bottom plate; the trimming insert surrounds the periphery of the shaping block and is used for punching burrs and gates of the frame of the upright post of the frequency converter; two force transmission columns are connected to the central line of the connecting push plate in the length direction, a first loading spring is arranged around one end, connected with the connecting push plate, of each force transmission column, and the other end of each force transmission column is suspended and can be in contact with the vertical column of the frequency converter. Through setting up shaping block and side cut insert, when direction thrust structure moved down, accomplish shaping and cutting burr and casting head, two original processes are replaced to a process, improve production efficiency.
Description
Technical Field
The utility model belongs to the field of machining, especially a silence converter stand plastic cut off die.
Background
The shape of the blank formed by pouring the stand column of the silent frequency converter does not meet the requirement of direct use, and meanwhile, the blank piece is also provided with edge thorns and casting heads which can be normally used after being cut.
At present, the edge thorn and the dead head are cut by sawing the dead head by a sawing machine or cutting off the dead head by using an edge cutting die, and a sizing die is required to be replaced when the blank is sized. Therefore, two sets of dies need to be put into, one more process is needed, one more operation worker is needed, one more equipment is occupied, the production efficiency is low, and the production cost is higher.
Disclosure of Invention
The utility model aims at providing a silence converter stand plastic cut off die improves work efficiency to reduction in production cost.
In order to achieve the purpose, the utility model adopts the following technical scheme.
A silent frequency converter upright post shaping trimming die comprises a positioning male die, a shaping block, a plurality of trimming inserts, an upper die frame and a lower die frame, wherein the positioning male die is installed on the lower die frame; one end of the guide limiting structure is connected with the force transmission plate, and the other end of the guide limiting structure is fixedly connected with the bottom plate; the trimming insert surrounds the periphery of the shaping block and is used for punching burrs and gates of the frame of the upright post of the frequency converter; connect and be connected with two biography power posts on push pedal length direction's the central line, the biography power post passes in proper order deflector and biography power board form sliding connection through the shaft hole cooperation to can contact, every with the converter stand the biography power post is around there being first loading spring, first loading spring is located connect between push pedal and the biography power board.
By adopting the technical scheme, the utility model discloses, through connecting shaping block and side cut insert below the deflector, when the upper die carrier moves down, accomplish simultaneously to the silence converter stand carry on the plastic and cut burr and casting head, replace the sawing machine saw cut casting head or cut off the casting head with the cut off die, and carry out the plastic to the blank with the shaping die, replace two former processes through a process of pushing down, practice thrift production time and cost of labor, improve production efficiency; the lower die frame is guided and limited in height by the guide limiting structure, so that the silent frequency conversion upright posts are prevented from being damaged by dislocation during shaping or trimming; and a force transmission column and a first loading spring are also arranged, move downwards along with the connecting push plate, pre-press the center of the mute frequency conversion stand column, further position the mute frequency conversion stand column, ensure that the relative positions of the shaping block and the trimming insert and the mute frequency conversion stand column are accurate, and ensure the quality of a processed product.
Preferably, the connecting push plate is connected with a hydraulic mechanism, and the guide plate and the connecting push plate are fixedly connected together through two parallel foot pads.
The connecting push plate and the guide plate are fixedly connected through the pad feet, so that the guide plate and the connecting push block move synchronously during die assembly and die opening.
Preferably, the connecting push plate is fixedly connected with a plurality of spring columns, and each spring column is sleeved with the second loading spring; the force transmission plate is provided with an avoidance hole for avoiding the spring column, and the force transmission plate is provided with a counter bore for installing a second loading spring.
By arranging the spring column and surrounding the second loading spring on the spring column, the second loading spring is extruded when the connecting push plate moves downwards, so that the force transmission plate moves downwards, the part connected to the force transmission plate is driven to move downwards, and pre-pressure is applied to the stand column of the mute frequency converter.
Preferably, direction limit structure is provided with four to be located the four corners department near the deflector respectively, direction limit structure is by on the first spacing post with first spacing post under the long combination form, all be one end on the first spacing post with under the first spacing post and be formed with the projection, the other end be formed with can with the looks isostructure of projection complex blind hole, when being used for the compound die of upper and lower mould with the locating hole formation post hole cooperation on the biography power board on the projection on the first spacing post.
Through setting up four direction limit structure, guarantee that the shaping piece of being connected with the deflector and cut edge insert can be accurate and the silence frequency conversion stand of below aim at to through on the first spacing post and when first spacing post is lower the butt, the height that moves down of the shaping piece of being connected with the deflector and cut edge insert is restricted, avoids moving down transition damage silence frequency conversion stand.
Preferably, the four corners department of deflector is connected with three guide structure and a limit structure, guide structure is by under the spacing post of second with connect long the combination on the spacing post of second, all be one end under the spacing post of second and on the spacing post of second and be formed with the projection, the other end is formed with the looks isostructure that can with projection complex blind hole, the projection on the spacing post of second is used for forming the post hole cooperation with the locating hole on the deflector when the lower mould compound die.
Through setting up three guide structure and a limit structure, further restrict the deflector through three guide structure and rotate or move along X axle, Y axle when moving down, guarantee the accuracy of shaping block and side cut insert and silence frequency conversion stand relative position.
Preferably, limit structure is including connecting on the spacing post of third on same plumb line and under the spacing post of third, on the spacing post of third and deflector fixed connection, under the spacing post of third and lower die holder fixed connection, when going up the lower mould compound die can with the spacing post of third on the spacing post of third under the butt.
Through setting up limit structure, further restrict the shaping block of being connected with the deflector and cut edge insert move down the height, avoid moving down transition damage silence frequency conversion stand.
Preferably, the dowel plate is connected with a plurality of pressing pin columns, and the far end of each pressing pin column penetrates through the shaping block and can be in contact with the upright post of the frequency converter.
Through setting up the compression round pin axle, compress tightly the location to the both sides of converter stand through the compression round pin axle.
Preferably, the shaping block is wholly rectangular and is provided with two blocks, the shaping block is respectively positioned above two sides of the silent frequency converter stand column, the shaping block is identical to the frequency converter stand column in appearance, one side connected with the guide plate is arranged to be a plane, one side far away from the guide plate is formed with a step shape matched with the front surface of the frequency converter stand column, and a concave-convex structure is formed on the step shape and matched with the front convex-concave structure of the frequency converter stand column.
The shaping block is identical to the crankcase cover in appearance, the concave-convex structure corresponding to the qualified size of the upright post of the frequency converter is formed, and the concave-convex structure is matched with the concave-convex structure of the blank of the mute frequency conversion upright post, so that the corresponding concave-convex structure of the mute frequency conversion upright post is shaped through the concave-convex structure, and the shaping purpose is achieved.
Preferably, the positioning male die is rectangular and provided with two positioning male dies which are respectively positioned below two sides of the silent frequency converter stand column, one side of the positioning male die, which is attached to the bottom plate, is a plane, and one side of the positioning male die, which is attached to the back surface of the frequency converter stand column, is a step-shaped structure, a concave-convex structure is formed on the step-shaped structure, and the concave-convex structure is matched with the concave-convex structure on the back surface of the frequency converter stand column.
Through setting up the location terrace die into two and be provided with concave-convex structure, support and fix a position the both sides back of the converter stand that corresponds, avoid making the converter stand take place to deform among the stamping process.
Preferably, 4 trimming inserts are arranged on the periphery of each shaping block, a knife edge is arranged on one side, which is attached to each other, of each shaping block, and the structure of the knife edge is the same as that of the periphery of the corresponding frequency converter stand column.
A knife edge is arranged at one side of the shaping block, which is attached to the edge cutting insert, and burrs and a casting head of the upright post of the frequency converter are punched through the knife edge; and the trimming inserts are arranged into 4 blocks, so that the installation, production and processing are convenient.
Preferably, 4 trimming inserts are arranged on the periphery of each shaping block, and the trimming inserts are close to the inner side of the shaping block to form a knife edge for cutting the periphery of the upright post of the frequency converter; and a connecting push block is also arranged between the trimming insert and the guide plate.
4 edge cutting inserts are arranged, and a knife edge for cutting the periphery of the upright post of the frequency converter is formed on the inner side, close to the shaping block, of the edge cutting inserts, and the knife edge is used for cutting burrs on the periphery of the upright post of the frequency converter; and the connecting push block is arranged to fill the height difference between the edge cutting insert and the guide plate, so that the accuracy of the position of the edge cutting insert is ensured.
The utility model has the advantages that the shaping block and the trimming insert are connected below the guide thrust structure, when the guide thrust structure moves down, the shaping, burr cutting and dead head cutting are simultaneously completed on the silent frequency converter stand column, the dead head sawing of a sawing machine is replaced, or the dead head is cut off by a trimming die, the shaping die is replaced to shape the blank, two original processes are replaced by one process of pressing down, the production time and the labor cost are saved, and the production efficiency is improved; the lower die frame is guided and the lower moving height is limited by the guide limiting structure, so that the mute variable-frequency stand column is prevented from being damaged by dislocation during shaping or trimming; still set up power transmission post and first loading spring, move down along with direction thrust structure, compress tightly the center of silence frequency conversion stand, further fix a position silence frequency conversion stand, guarantee that shaping block and side cut insert are accurate with the relative position of silence frequency conversion stand, guarantee the product quality after the processing.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a structural view of the present invention with the connecting push plate removed;
fig. 3 is a structural view of fig. 2 without the guide plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.
The utility model discloses a description reference numeral includes: the device comprises a connecting push plate 1, a pad foot 11, a second limit column lower 2, a second limit column upper 21, a guide plate 3, a force transmission plate 4, a first limit column upper 41, a first limit column lower 42, a third limit column upper 43, a third limit column lower 44, a bottom plate 5, a force transmission column 6, a first loading spring 61, a spring column 64, a second loading spring 63, an edge cutting insert 7, a connecting push block 8, a shaping block 9, a pressing pin column 91, a positioning convex die 10, a frequency converter upright 13 and a lower die carrier 14.
Referring to fig. 1 and 2, the silent frequency converter upright post shaping trimming die comprises a positioning male die 10, a shaping block 9, a plurality of trimming inserts 7, an upper die frame and a lower die frame 14, wherein the positioning male die 10 is mounted on the lower die frame 14, the upper die frame comprises a connecting push plate 1, a force transmission plate 4 and a guide plate 3 which are sequentially arranged from top to bottom, and the shaping block 9 and the trimming inserts are connected below the guide plate 3; one end of the guide limiting structure is connected with the force transmission plate 4, and the other end of the guide limiting structure is fixedly connected with the bottom plate 5; the edge cutting insert surrounds the periphery of the shaping block 9 and is used for punching burrs and gates of the frame of the upright post 13 of the frequency converter; connect and be connected with two biography power posts 6 on push pedal 1 length direction's the central line, biography power post 6 passes in proper order deflector 3 and biography power board 4 form sliding connection through the shaft hole cooperation to can contact, every with converter stand 13 biography power post 6 is around there being first loading spring 61, first loading spring 61 is located connect between push pedal 1 and the biography power board 4.
Referring to fig. 1, the connecting push plate 1 is connected with a hydraulic mechanism, and the guide plate 3 and the connecting push plate 1 are fixedly connected together through two parallel foot pads 11.
Referring to fig. 1, the connecting pushing plate 1 is fixedly connected with a plurality of spring posts 64, and each spring post 64 is sleeved with the second loading spring 63; the force transmission plate 4 is provided with an avoidance hole for avoiding the spring column 64, and the force transmission plate 4 is provided with a counter bore for installing the second loading spring 63.
Referring to fig. 1, the four guiding and limiting structures are respectively located at four corners close to the guide plate 3, each guiding and limiting structure is formed by lengthening and combining a first limiting column upper 41 and a first limiting column lower 42, each of the first limiting column upper 41 and the first limiting column lower 42 is a blind hole with one end formed with a convex column and the other end formed with the same structure as a blind hole capable of being matched with the convex column, and the convex column of the first limiting column upper 41 is matched with a positioning hole of the force transmission plate 4 to form column hole matching when the upper die and the lower die are assembled.
Referring to fig. 2, the four corners of the guide plate 3 are connected with three guide structures and a limit structure, the guide structures are formed by lengthening and combining the second limit post lower 2 and the second limit post upper 21, the second limit post lower 2 and the second limit post upper 21 are both of the same structure that one end is formed with a convex column and the other end is formed with a blind hole matched with the convex column, and the convex column of the second limit post upper 21 is matched with the locating hole of the guide plate 3 when the upper die and the lower die are closed.
Referring to fig. 1 and 2, the limiting structure includes a third limiting column upper 43 and a third limiting column lower 44 connected to the same vertical line, the third limiting column upper 43 is fixedly connected to the guide plate 3, the third limiting column lower 44 is fixedly connected to the lower mold frame 14, and the third limiting column upper 43 can abut against the third limiting column lower 44 when the upper mold and the lower mold are closed.
Referring to fig. 1, a plurality of pressing pins 91 are connected to the force transmission plate 4, and a distal end of each pressing pin 91 penetrates through the shaping block 9 and can be in contact with the inverter column 13.
Referring to fig. 3, the shaping block 9 is rectangular and provided with two blocks, and the two blocks are respectively located above two sides of the silent frequency converter upright 13, the shaping block 9 has the same shape as the frequency converter upright 13, one side connected with the guide plate 3 is set to be a plane, one side far away from the guide plate 3 is formed with a step shape matched with the front surface of the frequency converter upright 13, and the step shape is provided with a concave-convex structure matched with the convex-concave structure on the front surface of the frequency converter upright 13.
Referring to fig. 1, the positioning male die 10 is rectangular and provided with two positioning male dies, and the two positioning male dies are respectively located below two sides of the silent frequency converter upright 13, one side of the positioning male die 10, which is attached to the bottom plate 5, is a plane, and one side of the positioning male die, which is attached to the back of the frequency converter upright 13, is a step-shaped, a concave-convex structure is formed on the step-shaped, and the concave-convex structure is matched with the concave-convex structure on the back of the frequency converter upright 13.
Referring to fig. 1 to 3, 4 trimming inserts are arranged on the periphery of each shaping block 9, a knife edge is arranged on one side of each shaping block 9, which is attached to the trimming insert, and the structure of the knife edge is the same as that of the periphery of the corresponding frequency converter upright column 13. 4 trimming inserts are arranged on the periphery of each shaping block 9, and the trimming inserts are close to the inner side of each shaping block 9 to form a knife edge for cutting the periphery of the upright post 13 of the frequency converter; and a connecting push block 8 is also arranged between the trimming insert and the guide plate 3.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The shaping and trimming die for the stand column of the silent frequency converter is characterized by comprising a positioning male die (10), a shaping block (9), a plurality of trimming inserts (7), an upper die frame and a lower die frame, wherein the positioning male die (10) is installed on the lower die frame (14), the upper die frame comprises a connecting push plate (1), a force transmission plate (4) and a guide plate (3) which are sequentially arranged from top to bottom, and the shaping block (9) and the trimming inserts (7) are connected below the guide plate (3); one end of the guide limiting structure is connected with the dowel plate (4), and the other end of the guide limiting structure is fixedly connected with the bottom plate (5); the edge cutting insert (7) surrounds the periphery of the shaping block (9) and is used for punching burrs and gates of the frame of the upright post (13) of the frequency converter; connect push pedal (1) length direction's central line on be connected with two biography power posts (6), biography power post (6) pass in proper order deflector (3) and biography power board (4) form sliding connection through the shaft hole cooperation to can contact, every with converter stand (13) biography power post (6) are around there being first loading spring (61), first loading spring (61) are located connect between push pedal (1) and biography power board (4).
2. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein the connecting push plate (1) is connected with a hydraulic mechanism, and the guide plate (3) and the connecting push plate (1) are fixedly connected together through two parallel foot pads (11).
3. The silent frequency converter upright post shaping and trimming die according to claim 2, wherein the connecting push plate (1) is fixedly connected with a plurality of spring posts (64), and each spring post (64) is sleeved with a second loading spring (63); the force transmission plate (4) is provided with an avoidance hole for avoiding the spring column (64), and the force transmission plate (4) is provided with a counter bore for installing a second loading spring (63).
4. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein four guiding and limiting structures are provided and are respectively located at four corners close to the guide plate (3), each guiding and limiting structure is formed by combining an upper first limiting post (41) and a lower first limiting post (42) in an extending manner, each upper first limiting post (41) and each lower first limiting post (42) are of the same structure that one end is provided with a convex post and the other end is provided with a blind hole capable of being matched with the convex post, and the convex post of the upper first limiting post (41) is used for forming a post hole matched with the positioning hole on the force transmission plate (4) when the upper die and the lower die are closed.
5. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein the four corners of the guide plate (3) are connected with three guide structures and one limit structure, the guide structures are formed by lengthening and combining a second limit post lower part (2) and a second limit post upper part (21), the second limit post lower part (2) and the second limit post upper part (21) are of the same structure that one end is provided with a convex post and the other end is provided with a blind hole capable of being matched with the convex post, and the convex post of the second limit post upper part (21) is matched with the positioning hole of the guide plate (3) when the upper die and the lower die are closed.
6. The silent frequency converter upright post shaping and trimming die according to claim 5, wherein the limiting structure comprises a third limiting post upper part (43) and a third limiting post lower part (44) which are connected to the same vertical line, the third limiting post upper part (43) is fixedly connected with the guide plate (3), the third limiting post lower part (44) is fixedly connected with the lower die frame (14), and the third limiting post upper part (43) is abutted to the third limiting post lower part (44) when the upper die and the lower die are closed.
7. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein a plurality of pressing pins (91) are connected to the force transmission plate (4), and the distal end of each pressing pin (91) penetrates through the shaping block (9) and can be in contact with a frequency converter upright post (13).
8. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein the shaping block (9) is rectangular and provided with two blocks, the two blocks are respectively positioned above two sides of the silent frequency converter upright post (13), the shaping block (9) has the same shape as the upright post (13), one side connected with the guide plate (3) is arranged to be a plane, one side far away from the guide plate (3) is provided with a step shape matched with the front surface of the frequency converter upright post (13), and the step shape is provided with a concave-convex structure matched with the concave-convex structure on the front surface of the frequency converter upright post (13).
9. The silent frequency converter upright post shaping and trimming die according to claim 1, wherein the positioning male die (10) is rectangular and provided with two positioning male dies, the two positioning male dies are respectively positioned below two sides of the silent frequency converter upright post (13), one side of the positioning male die (10) attached to the bottom plate (5) is a plane, one side of the positioning male die attached to the back surface of the silent frequency converter upright post (13) is a step, and a concave-convex structure is formed on the step and is matched with the concave-convex structure on the back surface of the silent frequency converter upright post (13).
10. The silent frequency converter stand column shaping and trimming die according to claim 1, wherein 4 trimming inserts (7) are arranged around each shaping block (9), and the trimming inserts (7) close to the inner side of the shaping block (9) form a knife edge for cutting the periphery of the frequency converter stand column (13); and a connecting push block (8) is also arranged between the edge cutting insert (7) and the guide plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221157516.3U CN217315497U (en) | 2022-05-13 | 2022-05-13 | Silent frequency converter stand plastic trimming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221157516.3U CN217315497U (en) | 2022-05-13 | 2022-05-13 | Silent frequency converter stand plastic trimming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217315497U true CN217315497U (en) | 2022-08-30 |
Family
ID=82953128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221157516.3U Active CN217315497U (en) | 2022-05-13 | 2022-05-13 | Silent frequency converter stand plastic trimming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217315497U (en) |
-
2022
- 2022-05-13 CN CN202221157516.3U patent/CN217315497U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217315497U (en) | Silent frequency converter stand plastic trimming die | |
| CN211464496U (en) | Trimming die system based on gear pair grinds burr soon | |
| CN209363428U (en) | A kind of multi-functional chain guard stamping die | |
| CN217252164U (en) | Stamping machine tool die provided with automatic demolding mechanism and used for hardware machining | |
| CN213944548U (en) | Outer covering part trimming and side trimming die | |
| CN213530434U (en) | Automatic forming and stamping die for upper cover plate of quick-release lock part | |
| CN210146765U (en) | Circular tube side cutting die | |
| CN209773340U (en) | Cutting forming device of staple | |
| CN220347006U (en) | Three-sequence six-cavity die assembly die for left and right taillight brackets | |
| CN211071515U (en) | Inclined plane hole flanging device | |
| CN205914623U (en) | Interior radial trimming mechanism of mould upgrades | |
| CN219503531U (en) | Punching blanking die capable of reducing punching force | |
| CN211938666U (en) | Stamping progressive die | |
| CN217665736U (en) | Centralized automobile forming die | |
| CN219253860U (en) | Progressive die of short section punching machine | |
| CN213997445U (en) | Auto-parts stamping die | |
| CN218079921U (en) | Continuous punching die | |
| CN214919626U (en) | Punching device | |
| CN212238845U (en) | Battery case bottom plate side punching die | |
| CN215467411U (en) | Rotary cutting die for sleeve for automobile chassis | |
| CN215391997U (en) | End cover side cut mould that punches a hole | |
| CN220049616U (en) | Computer case panel stamping equipment | |
| CN219402048U (en) | Metal waste stamping device | |
| CN220805093U (en) | High-strength alloy opposite-pull-tab building template grooving machine | |
| CN214078950U (en) | Discharging mechanism of trimming die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |