CN220348678U - A mould for air brick integrated into one piece - Google Patents
A mould for air brick integrated into one piece Download PDFInfo
- Publication number
- CN220348678U CN220348678U CN202321740913.8U CN202321740913U CN220348678U CN 220348678 U CN220348678 U CN 220348678U CN 202321740913 U CN202321740913 U CN 202321740913U CN 220348678 U CN220348678 U CN 220348678U
- Authority
- CN
- China
- Prior art keywords
- plate
- hanging strip
- mounting
- mounting plate
- air brick
- 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
- 239000011449 brick Substances 0.000 title claims abstract description 61
- 238000000465 moulding Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 238000005266 casting Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The utility model discloses a die for integrally forming an air brick, which comprises a taper sleeve, an upper hanging strip plate, a top plate and a lower hanging strip plate, wherein the taper sleeve is positioned between the top plate and the lower hanging strip plate, the upper hanging strip plate is positioned above the top plate, the lower hanging strip plate comprises a first mounting plate, a second mounting plate and a hanging strip circular plate, a mounting groove for mounting the hanging strip circular plate is formed between the first mounting plate and the second mounting plate, a lower positioning groove for mounting the lower end of the positioning taper sleeve is also formed between the first mounting plate and the second mounting plate, the lower positioning groove is communicated with the mounting groove, and the diameter of the lower positioning groove is larger than that of the mounting groove. According to the utility model, the taper sleeve in the original plugging process is directly used in the forming process of the brick core of the air brick, the taper sleeve is used for replacing the original two semicircular metal shells with a certain taper, and the detachable lower hanging strip plate is arranged, so that the air brick is directly and integrally formed without the plugging process, thereby reducing the working strength of plugging operators and improving the manufacturing efficiency of the air brick.
Description
Technical Field
The utility model relates to the technical field of air brick production equipment, in particular to a die for integrally forming an air brick.
Background
The ladle air brick is the most critical functional refractory material in the bottom argon blowing process, and the structure of the air brick at present mainly comprises a dispersion air brick, a straight hole type air brick and a slit type air brick. The slit type air brick has larger advantages in the aspects of scouring resistance, slag penetration resistance and air uniformity compared with the dispersion type air brick and the straight hole type air brick, and becomes the most used ladle air brick at present.
The production process of the slit type air brick at present is generally key process points such as slit type air brick core molding, baking, plugging, air brick air chamber iron piece manufacturing and the like, the conventional slit type air brick core mold at present consists of two semicircular metal shells with a certain taper, an upper hanging slat, a top plate and a lower hanging slat, corresponding gaps are formed on the upper hanging slat and the lower hanging slat, the upper hanging slat and the top plate are detachably connected, when the air brick is used, plastic strips are firstly arranged in the gaps of the upper hanging slat and the lower hanging slat in a penetrating manner, then the two semicircular metal shells with a certain taper are assembled between the top plate and the lower hanging slat, after the air brick core is molded, the two semicircular metal shells with a certain taper are separated, the brick core is taken out, the brick core is plugged after baking, and then the air brick air chamber iron piece is manufactured; the conventional plugging is that the air brick core is arranged in the taper sleeve, then the air brick core is integrally placed in the air brick tire membrane, and the plugging is completed through hydraulic pressure, so that the working strength of plugging operators is increased, the production procedures and the production cost are increased, and the manufacturing efficiency of the air brick is reduced.
Therefore, the applicant provides a mould for integrally forming an air brick, wherein a taper sleeve in an original plugging process is directly used in a forming process of an air brick core, the taper sleeve is used for replacing two original semicircular metal shells with a certain taper, and the lower hanging strip plate is improved, so that the air brick is directly integrally formed without the plugging process, the working strength of plugging operators is reduced, and the manufacturing efficiency of the air brick is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a die for integrally forming an air brick.
The utility model adopts the following technical scheme to realize the aim:
the die for integrally forming the air brick comprises a taper sleeve, an upper hanging slat, a top plate and a lower hanging slat, wherein the taper sleeve is positioned between the top plate and the lower hanging slat, and the upper hanging slat is positioned above the top plate;
the lower hanging strip plate comprises a first mounting plate, a second mounting plate and a hanging strip circular plate, a mounting groove for mounting the hanging strip circular plate is formed between the first mounting plate and the second mounting plate, a lower positioning groove for positioning the lower end of the taper sleeve is further formed between the first mounting plate and the second mounting plate, the lower positioning groove is communicated with the mounting groove, and the diameter of the lower positioning groove is larger than that of the mounting groove.
Further, an upper positioning groove for installing the upper end of the positioning taper sleeve is formed in the bottom of the top plate, a pouring gate is formed in the top of the top plate, and the pouring gate is communicated with the upper positioning groove.
Further, the two sides on the top plate are provided with the upright posts, the tops of the upright posts are provided with threaded holes, the two sides of the upper hanging strip plate are connected with the threaded holes through positioning bolts, supporting nuts are arranged on the positioning bolts, and the supporting nuts are located between the bottoms of the upper hanging strip plate and the tops of the upright posts.
Further, the upper hanging strip plate and the hanging strip circular plate are respectively provided with a gap into which a plastic strip can be inserted.
Further, two ends of one side of the first mounting plate opposite to the second mounting plate are respectively provided with a guide pillar and a guide hole, and the guide pillar can be inserted into the guide hole.
Further, connecting pieces are arranged on two sides of the first mounting plate and two sides of the second mounting plate.
Further, the connecting piece comprises connecting lugs which are respectively arranged on the first mounting plate and the second mounting plate, and the two connecting lugs are connected through connecting bolts.
Further, an annular groove is formed in the taper sleeve.
Further, mounting holes are formed in two sides of the top plate and the lower hanging strip plate.
Compared with the prior art, the utility model provides the die for integrally forming the air brick, which has the following beneficial effects:
according to the utility model, the taper sleeve in the original plugging process is directly used in the forming process of the air brick core, the taper sleeve is used for replacing the original two semicircular metal shells with a certain taper, the first mounting plate, the second mounting plate and the hanging strip circular plate are matched with each other, so that the air brick is convenient to mount and dismount, and the taper sleeve is positioned through the lower positioning groove, so that the air brick is directly integrally formed without the plugging process, the working intensity of plugging operators is reduced, and the manufacturing efficiency of the air brick is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic view of the structure of the lower hanger plate of the present utility model when separated;
FIG. 4 is a schematic view of the structure of the lower hanger plate assembly of the present utility model;
FIG. 5 is a schematic view of the structure of the hanging strip plate of the present utility model;
fig. 6 is a schematic view of the structure of the top plate of the present utility model.
The mark in the figure is 1, taper sleeve; 2. hanging a slat on the upper part; 3. a top plate; 31. an upper positioning groove; 32. a sprue gate; 33. a column; 4. a lower hanging strip plate; 41. a first mounting plate; 42. a second mounting plate; 43. a mounting groove; 44. a lower positioning groove; 45. a hanging strip circular plate; 46. a guide post; 47. a guide hole; 48. a connecting piece; 481. a connecting lug; 482. a connecting bolt; 5. a mounting hole; 6. positioning bolts; 7. a support nut; 8. an annular groove.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying positive importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiment of the utility model provides a die for integrally forming air bricks, which comprises a taper sleeve 1, an upper hanging strip plate 2, a top plate 3 and a lower hanging strip plate 4, wherein the taper sleeve 1 is positioned between the top plate 3 and the lower hanging strip plate 4, and the upper hanging strip plate 2 is positioned above the top plate 3;
the lower hanging strip plate 4 comprises a first mounting plate 41, a second mounting plate 42 and a hanging strip circular plate 45, a mounting groove 43 for mounting the hanging strip circular plate 45 is formed between the first mounting plate 41 and the second mounting plate 42, a lower positioning groove 44 for positioning the lower end of the taper sleeve 1 is further formed between the first mounting plate 41 and the second mounting plate 42, the lower positioning groove 44 is communicated with the mounting groove 43, and the diameter of the lower positioning groove 44 is larger than that of the mounting groove 43.
The taper sleeve 1 is in a hollow taper truncated shape, one end of the taper sleeve 1 is large, the other end of the taper sleeve is small, in the embodiment, the diameter of the large end of the taper sleeve 1 is 148mm, the small end of the taper sleeve 1 is 110mm, and the height of the taper sleeve 1 is 475mm;
the upper hanging strip plate 2 is square, referring to fig. 5, in the present embodiment, the size of the upper hanging strip plate 2 is 160mm (length) ×160mm (width) ×8mm (height);
the top plate 3 has a square shape, and referring to fig. 6, in the present embodiment, the top plate 3 has a size of 220mm (length) ×220mm (width) ×10mm (height);
the size of the upper hanging strip plate 2 is smaller than that of the top plate 3, so that the follow-up pouring can be better carried out;
the lower hanging strip 4 is square in shape as a whole, and referring to fig. 3 and 4, in the present embodiment, the size of the lower hanging strip 4 is 220mm (length) ×220mm (width) ×20mm (height);
the shape of the hanging strip circular plate 45 is identical to the shape of the mounting groove 43, and referring to fig. 3 and 5, in this embodiment, the hanging strip circular plate 45 has a convex longitudinal section and is composed of an upper cylinder with a diameter of 100mm, a height of 4mm, and a lower cylinder with a diameter of 105mm and a height of 8mm;
the lower positioning groove 44 positions the small end of the drogue 1, and referring to fig. 3 and 4, in this embodiment, the lower positioning groove 44 has a diameter of 113mm and a depth of 8mm.
Referring to fig. 6, in this embodiment, an upper positioning groove 31 for installing the upper end of the positioning cone sleeve 1 is provided on the bottom of the top plate 3, a pouring opening 32 is provided on the top of the top plate 3, and the pouring opening 32 is communicated with the upper positioning groove 31, and the diameter of the upper positioning groove 31 is larger than that of the pouring opening 32.
The upper positioning groove 31 positions the large end of the taper sleeve 1, and referring to fig. 6, in this embodiment, the diameter of the upper positioning groove 31 is 150mm, and the depth is 5mm; the spout 32 has a diameter of 132mm and a depth of 5mm.
Referring to fig. 6, in this embodiment, the two sides of the top plate 3 are provided with the upright posts 33, the tops of the upright posts 33 are provided with threaded holes, the two sides of the upper hanging strip plate 2 are connected with the threaded holes through positioning bolts 6, the positioning bolts 6 are provided with supporting nuts 7, and the supporting nuts 7 are located between the bottoms of the upper hanging strip plate 2 and the tops of the upright posts 33.
Referring to fig. 6, in this embodiment, the number of the stand columns 33 is 4, the stand columns 33 are distributed on the top plate 3 in an array, the diameter of the stand columns 33 is 20mm, the height is 70mm, the number of the positioning bolts 6 is consistent with that of the stand columns 33, the number of the upper hanging strip plates 2 is also 4, 4 through holes are formed in the upper hanging strip plates 2, the positioning bolts 6 penetrate through the through holes to be connected with threaded holes in the stand columns 33, the upper hanging strip plates 2 are placed on the supporting nuts 7, the supporting nuts 7 move up and down on the positioning bolts 6, the space between the upper hanging strip plates 2 and the lower hanging strip plates 4 can be adjusted, the tightness of plastic strips is adjusted, the plastic strips can be uniformly distributed before casting, and the plastic strips are easily attached to each other in the molding casting process, so that the later products do not reach the standard.
Referring to fig. 3 and 5, in this embodiment, slits into which plastic strips can be inserted are formed in both the upper hanging strip plate 2 and the hanging strip circular plate 45.
The center line of the upper hanging strip plate 2 is the same as the axis of the hanging strip circular plate 45, the gaps are uniformly distributed along the circumferential direction of the axis of the hanging strip circular plate 45, and the gaps on the hanging strip circular plate 45 are in one-to-one correspondence with the gaps on the upper hanging strip plate 2;
the plastic strips are plastic strips, and when the air brick passes through the baking procedure, the plastic strips are melted, so that the purpose of forming slits of the air brick is achieved.
Referring to fig. 3, in this embodiment, two ends of the opposite side of the first mounting plate 41 to the second mounting plate 42 are respectively provided with a guide post 46 and a guide hole 47, and the guide post 46 can be inserted into the guide hole 47, so that the first mounting plate 41 and the second mounting plate 42 can be conveniently spliced together by matching the guide post 46 with the guide hole 47.
Referring to fig. 3 and 4, in the present embodiment, the two sides of the first mounting plate 41 and the second mounting plate 42 are provided with connecting members 48.
In this embodiment, referring to fig. 3 and 4, the connector 48 includes a connecting lug 481 located on the first mounting plate 41 and the second mounting plate 42, and the two connecting lugs 481 are connected by a connecting bolt 482.
The connecting lugs 481 on the first mounting plate 41 and the second mounting plate 42 are connected through the connecting bolts 482, so that stability is improved, and the quality problem of products caused by loosening of the first mounting plate 41 and the second mounting plate 42 during casting and forming of air bricks is avoided.
Referring to fig. 1 and 2, in this embodiment, the cone sleeve 1 is provided with an annular groove 8.
After the air brick is formed, in the subsequent baking process, the taper sleeve 1 is subjected to thermal expansion in baking, the annular grooves 8 are added to prevent the air brick from loosening in the baking process, the stability is enhanced, the number of the annular grooves 8 is at least one, in the embodiment, the number of the annular grooves 8 is one, the depth of the annular grooves 8 is 10mm, and the position of the annular grooves is 120mm away from the large end of the taper sleeve 1.
Referring to fig. 3 and 6, in this embodiment, mounting holes 5 are formed on both sides of the top plate 3 and the lower hanging strip plate 4.
The mounting holes 5 are arranged for placing the pull rod when in use and are used for controlling the height of the plastic strip; the number of the mounting holes 5 is 4, and the mounting holes are respectively distributed on the top plate 3 and the lower hanging strip plate 4 in an array.
Referring to fig. 1 and 2, in the present embodiment, the center line of the upper hanger plate 2, the axis of the hanger plate 45, the center line of the top plate 3, and the axis of the drogue 1 are the same.
Working principle: when the plastic strip casting machine is used, the top plate 3 is connected with the upper hanging strip plate 2 through the positioning bolt 6, then the plastic strip is inserted into the gaps on the upper hanging strip plate 2 and the lower hanging strip plate 45, then the hanging strip plate 45 is put in from the large end of the taper sleeve 1 and penetrates through the taper sleeve 1, then the first mounting plate 41 and the second mounting plate 42 are spliced together through the cooperation of the guide post 46 and the guide hole 47, the small end of the taper sleeve 1 is positioned in the lower positioning groove 44, the hanging strip plate 45 is positioned in the mounting groove 43, the first mounting plate 41 is connected with the connecting lug 481 on the second mounting plate 42 through the connecting bolt 482, the stability is improved, the height of the plastic strip is controlled by placing the pull rod in the mounting hole 5 on the top plate 3 and the lower hanging strip plate 4, the space between the upper hanging strip plate 2 and the lower hanging strip plate 4 is adjusted through adjusting the supporting nut 7, and the plastic strip is tightened, and after the adjustment is completed, the casting molding is finished into the casting opening 32.
According to the utility model, the taper sleeve 1 in the original plugging process is directly used in the forming process of the brick core of the air brick, the taper sleeve 1 is used for replacing the original two semicircular metal shells with a certain taper, and the air brick is directly integrally formed by arranging the lower hanging strip plates 4 which are convenient to mount and dismount, so that the plugging process is not needed, the working intensity of plugging operators is reduced, and the manufacturing efficiency of the air brick is improved.
What is not described in detail in this specification is prior art known to those skilled in the art.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present utility model or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present utility model, which also falls within the scope of the present utility model.
Claims (9)
1. The die for integrally forming the air brick comprises a taper sleeve (1), an upper hanging strip plate (2), a top plate (3) and a lower hanging strip plate (4), and is characterized in that the taper sleeve (1) is positioned between the top plate (3) and the lower hanging strip plate (4), and the upper hanging strip plate (2) is positioned above the top plate (3);
the lower hanging strip plate (4) comprises a first mounting plate (41), a second mounting plate (42) and a hanging strip circular plate (45), a mounting groove (43) for mounting the hanging strip circular plate (45) is formed between the first mounting plate (41) and the second mounting plate (42), a lower positioning groove (44) for positioning the lower end of the taper sleeve (1) is further formed between the first mounting plate (41) and the second mounting plate (42), the lower positioning groove (44) is communicated with the mounting groove (43), and the diameter of the lower positioning groove (44) is larger than that of the mounting groove (43).
2. The mold for integrally forming the air brick according to claim 1, wherein an upper positioning groove (31) for installing the upper end of the positioning taper sleeve (1) is formed in the bottom of the top plate (3), a pouring gate (32) is formed in the top of the top plate (3), and the pouring gate (32) is communicated with the upper positioning groove (31).
3. The mold for integrally forming the air brick according to claim 1, wherein the two sides of the top plate (3) are provided with the upright posts (33), the tops of the upright posts (33) are provided with threaded holes, the two sides of the upper hanging strip plate (2) are connected with the threaded holes through positioning bolts (6), the positioning bolts (6) are provided with supporting nuts (7), and the supporting nuts (7) are located between the bottoms of the upper hanging strip plate (2) and the tops of the upright posts (33).
4. The mold for integrally forming air bricks according to claim 1, wherein slits capable of inserting plastic strips are formed on the upper hanging strip plate (2) and the hanging strip circular plate (45).
5. The mold for integrally molding air brick according to claim 1, wherein guide posts (46) and guide holes (47) are provided on both ends of the side of the first mounting plate (41) opposite to the second mounting plate (42), respectively, and the guide posts (46) can be inserted into the guide holes (47).
6. The mold for integrally forming air bricks according to claim 5, wherein both sides of the first mounting plate (41) and the second mounting plate (42) are provided with connecting members (48).
7. The mold for integrally molding an air brick according to claim 6, wherein the connecting member (48) comprises connecting lugs (481) respectively provided on the first mounting plate (41) and the second mounting plate (42), and the two connecting lugs (481) are connected by a connecting bolt (482).
8. Mould for the integral formation of air bricks according to claim 1, characterized in that the cone sleeve (1) is provided with an annular groove (8).
9. The mold for integrally forming the air brick according to claim 1, wherein mounting holes (5) are formed on two sides of the top plate (3) and the lower hanging strip plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740913.8U CN220348678U (en) | 2023-07-05 | 2023-07-05 | A mould for air brick integrated into one piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740913.8U CN220348678U (en) | 2023-07-05 | 2023-07-05 | A mould for air brick integrated into one piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220348678U true CN220348678U (en) | 2024-01-16 |
Family
ID=89507152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321740913.8U Active CN220348678U (en) | 2023-07-05 | 2023-07-05 | A mould for air brick integrated into one piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220348678U (en) |
-
2023
- 2023-07-05 CN CN202321740913.8U patent/CN220348678U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220348678U (en) | A mould for air brick integrated into one piece | |
| CN210851129U (en) | Injection mold convenient to replace | |
| CN211465510U (en) | Firm chassis of mould production usefulness | |
| CN210415394U (en) | Ejection device | |
| CN212193593U (en) | A mould for air brick production | |
| CN218109294U (en) | Hollow steel ingot pouring mold | |
| CN220163074U (en) | Accurate loading attachment of metal mesh plate | |
| CN211031375U (en) | Can decide quick forming die in high easy demoulding dovetail groove | |
| CN210648090U (en) | Cold extrusion forming die for metal mobile phone shell | |
| CN219852006U (en) | Molding sand casting mold with multiple hot-joint feeding | |
| CN219768584U (en) | Vertical expansion punching cracking-proof forming machine | |
| CN205075216U (en) | Well gluey tube formwork utensil | |
| CN213660198U (en) | Magnetic steel sleeve forming die | |
| CN212734093U (en) | Quick replacement mechanism for vulnerable centrosymmetric core of die-casting die | |
| CN214919808U (en) | Mould blank preforming device of complicated mould | |
| CN218171062U (en) | Mould of rubber component production usefulness | |
| CN216782564U (en) | Limiting device for mould feeding gun | |
| CN219274399U (en) | Hub gravity casting die | |
| CN220361897U (en) | Molybdenum slab mould | |
| CN211917422U (en) | Mould structure with in-mould assembling function | |
| CN219359761U (en) | Make things convenient for panel forming die of dismouting | |
| CN218903115U (en) | Hot extrusion die | |
| CN216705870U (en) | Forming die is used in production of seamless calcium line | |
| CN115069991B (en) | Graphite sleeve replacing device for preparing crystallizer for oxygen-free copper rod | |
| CN112854901B (en) | Mold for casting and casting door handle, door handle manufacturing process and casting door handle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |