CN216423381U - Water cooling circulation system of plastic corrugated pipe forming die - Google Patents
Water cooling circulation system of plastic corrugated pipe forming die Download PDFInfo
- Publication number
- CN216423381U CN216423381U CN202123042397.5U CN202123042397U CN216423381U CN 216423381 U CN216423381 U CN 216423381U CN 202123042397 U CN202123042397 U CN 202123042397U CN 216423381 U CN216423381 U CN 216423381U
- Authority
- CN
- China
- Prior art keywords
- pipe
- flaring
- water
- main
- module
- 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
Abstract
The utility model discloses a water cooling circulation system of plastic corrugated pipe forming die, including flaring cooling water route and the person in charge cooling water route, flaring cooling water route includes flaring total inlet tube, flaring total return pipe and flaring branch inlet pipe and flaring branch return pipe that correspond every flaring module, and the person in charge cooling water route includes root segment total inlet tube, root segment total return pipe, around setting up in the fixed bracket outside and with the annular total inlet channel and the annular total return pipe of water diversion seat fixed connection, correspond the person in charge branch inlet pipe and the person in charge branch return pipe of every person in charge module; the flaring total inlet tube, the flaring total return pipe, the root segment total inlet tube and the root segment total return pipe are located inside the drag chain, the two ends of the drag chain are connected with the rotary joint component and fixedly connected with the water diversion seat, the annular total inlet channel and the annular total return channel move synchronously along with the module, and the drag chain moves on the fixed bracket around the connection rotary joint component. The water cooling circulation system can respectively cool the flaring module and the main cooling pipe module, and the quality and the efficiency of producing the pipe are improved.
Description
Technical Field
The utility model relates to a make plastic corrugated pipe's equipment, especially relate to plastic corrugated pipe forming die's water cooling circulation system.
Background
The process of manufacturing plastic corrugated tubing is generally: the plastic raw material is firstly heated by a plastic extruder to be plasticized and converted into a molten state, the molten plastic material passes through an extruder head (the extruder head is provided with an extruder die body) to form a tube blank with a tube shape, the tube blank is formed into a plastic corrugated tube product after entering a forming die, and the plastic corrugated tube with undetermined shape and size and higher temperature is cooled and shaped by effective cooling, so that the plastic corrugated tube product has a specific shape and size which can be maintained, and the cooling in the process comprises a sizing sleeve cooling system cooling corrugated tube inner layer tube and a forming die cooling system cooling corrugated tube outer layer tube, so that the plastic corrugated tube is cooled and shaped.
A common corrugated pipe generally includes a main pipe body and a flare, and correspondingly, a forming mold for forming the corrugated pipe generally includes a main pipe body forming module (referred to as a main pipe module) and a flare forming module (referred to as a flare module). Because of being responsible for body module and flaring module both inner chambers size difference, flaring module internal diameter will be greater than being responsible for the body module usually, is responsible for the wall thickness inequality of body and flaring, therefore, is responsible for body module and flaring module when cooling, and the cooling water temperature and the cooling time that need are inequality.
In the prior art, a single-water-path circulating cooling system is adopted in a forming die cooling system, namely, cooling water of the same circulating channel is adopted for a main tube module and a flaring module. One set of circulation water route of sharing need compromise both cooling demands, however, if the circulation temperature is too high, be unfavorable for the rapid cooling of tubular product, production speed hardly promotes. If the circulating water temperature is too low, the production speed can be greatly increased, but the flared part of the pipe is easily deformed and broken. Therefore, at present, in order to ensure the appearance requirement of the flared tube, the water temperature can only be properly increased, and the production speed of the tube can only be reduced. Severely limiting the efficiency of producing the pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a water cooling circulation system of plastic corrugated pipe forming die is provided, the temperature that can control the person in charge cooling water route and flaring cooling water route respectively comes the temperature of the person in charge module and the flaring module that accurate control corresponds, improves the efficiency of producing plastic corrugated pipe.
In order to solve the technical problem, the utility model discloses take following technical scheme:
a water cooling circulation system of a plastic corrugated pipe forming die is characterized in that,
comprises a fixed bracket, a flaring cooling water path for cooling the flaring module, a main pipe cooling water path for cooling the main pipe module and a driving device,
the fixed bracket is fixedly connected on the mounting seat, an annular track for the operation of the forming modules is arranged on the mounting seat, the flaring cooling water path comprises a flaring main water inlet pipe, a flaring main water return pipe, a flaring water inlet pipe and a flaring water return pipe which are arranged corresponding to each flaring module,
the main pipe cooling water path comprises a root section main water inlet pipe, a root section main water return pipe, an annular main water inlet channel, an annular main water return channel, a main pipe branch water inlet pipe and a main pipe branch water return pipe, wherein the main pipe branch water inlet pipe and the main pipe branch water return pipe are arranged corresponding to each main pipe module;
the total flaring water inlet pipe, the total flaring water return pipe, the total root section water inlet pipe and the total root section water return pipe are all positioned inside the drag chain, the total flaring water inlet pipe, the total flaring water return pipe, the total root section water inlet pipe and the total root section water return pipe are all positioned between the connecting rotary joint component and the water diversion seat and are respectively fixedly connected with the connecting rotary joint component and the water diversion seat,
the annular main water inlet channel and the annular main water return channel are annularly wound outside the fixed bracket, the annular main water inlet channel and the annular main water return channel are fixedly connected with the water distribution seat,
when the forming module runs along the annular track, the driving device drives the annular main water inlet channel and the annular main water return channel to synchronously move along with the module, and the drag chain moves on the fixed bracket around the connecting rotary joint component.
Preferably, the driving device comprises a driving wheel, a first driven wheel, a second driven wheel and an annular chain, wherein the first driven wheel, the second driven wheel and the annular chain are meshed with the driving wheel, the first driven wheel and the second driven wheel are respectively arranged at two ends of the fixing bracket, and the annular chain is wound on the first driven wheel and the second driven wheel.
Preferably, a plurality of connecting pipe connecting seats which are arranged at intervals are fixed on the annular main water inlet channel and the annular main water return channel, and the annular chain is fixedly connected with the annular main water inlet channel and the annular main water return channel through the connecting pipe connecting seats.
Preferably, a flaring module water inlet joint, a flaring module water return joint, a main pipe module water inlet joint and a main pipe module water return joint are arranged on the water distribution seat, the flaring module water inlet joint is connected with the flaring module through the flaring water inlet pipe, and the flaring module water return joint is connected with the flaring module through the flaring water inlet pipe; the main pipe module water inlet joint is connected with the annular main water inlet channel, and the main pipe module water return joint is connected with the annular main water return channel.
Preferably, the connecting pipe connecting seat is connected with the main pipe module through the main pipe water dividing pipe and the main pipe water dividing and returning pipe.
Preferably, the fixing bracket comprises a plurality of supporting columns and a top annular tray, and the top annular tray is fixed on the mounting seat through the plurality of supporting columns.
Preferably, the tow chain is located on and movable within the top annular tray.
Preferably, the rotary joint subassembly includes unable adjustment base and rotary joint, unable adjustment base fixes on the annular tray in top, rotary joint is rotatable installs unable adjustment base is last, rotary joint with unable adjustment base is last all to be provided with flaring transition inlet channel, flaring transition return water course, the person in charge transition inlet channel and the person in charge transition return water course, flaring transition inlet channel intercommunication the total inlet tube of flaring, flaring transition return water course intercommunication the total wet return of flaring, the person in charge transition inlet channel intercommunication the total inlet tube of root segment, the person in charge transition return water course intercommunication the total wet return of root segment.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a plastic corrugated pipe forming die's water cooling circulation system, the water that introduces from the outside passes through the rotary joint subassembly and divides into two mutually noninterferes, two cooling water routes of circulating alone, is the flaring cooling water route of cooling flaring module, the cooling person in charge's of module cooling water route respectively. The temperature of the main pipe module and the flaring module which correspond to each other is accurately controlled by respectively controlling the temperature of the main pipe cooling water path and the flaring cooling water path, so that the cooling speed of the main pipe and the flaring pipe is controlled, the whole pipe is uniformly cooled, flaring cracking is avoided, the cooling effect for controlling the whole pipe is finally achieved, the production speed is increased, and the quality of the pipe is improved.
Drawings
Fig. 1 is a schematic structural diagram of a water cooling circulation system of a plastic corrugated pipe forming mold according to the present invention (a part of the forming mold is in a mold closing state);
FIG. 2 is a side view (rotated 90 counterclockwise) of FIG. 1;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is an enlarged view of the swivel assembly of FIG. 1;
in the figure:
1. a fixing bracket; 101. supporting the upright post; 102. a top annular tray; 2. a mounting seat; 301. a main water inlet pipe is flared; 302. a flaring main water return pipe; 303. a flaring water inlet pipe; 304. a flaring water diversion return pipe; 401. a root section main water inlet pipe; 402. a root section total water return pipe; 403. an annular main water inlet channel; 404. an annular main water return channel; 405. the main pipe is divided into water pipes; 406. the main pipe is divided into return pipes; 5. a drag chain; 6. connecting the rotary joint assembly; 601. a fixed base; 602. a rotary joint; 603. flaring a transitional water inlet channel; 604. flaring and transition are carried out to the water return channel; 605. a main pipe transition water inlet channel; 606. the main pipe is in transition to the water channel; 7. a water distribution seat; 701. a water inlet joint of the flaring module; 702. a water return joint of the flaring module; 703. a main pipe module water inlet joint; 704. a main pipe module water return joint; 801. a driving wheel; 802. a first driven wheel; 803. a second driven wheel; 804. an endless chain; 9. a connecting pipe connecting seat; K. a flaring module; z, a master pipe module.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings and specific embodiments for further understanding the objects, solutions and functions of the present invention, but not intended to limit the scope of the appended claims.
The whole set of mould of operation includes 34 to being responsible for the module and 2 to the flaring module (only the part is illustrated in fig. 1 to fig. 3) altogether on the make-up machine, and above-mentioned module is arranged in pairs at the left platform and the right platform of make-up machine, and left platform and right platform respectively install one set the utility model discloses a plastic corrugated pipe forming die's water cooling circulation system.
As shown in fig. 1 to 4, the water cooling circulation system of the plastic corrugated pipe forming mold includes a fixing bracket 1, a flare cooling water path for cooling the flare module, a main pipe cooling water path for cooling the main pipe module, and a driving device. In this embodiment, the main pipe cooling water path is used for cooling the main pipe module by 34, and the flare cooling water path is used for cooling the flare module by 2.
Wherein the fixing bracket 1 is fixedly connected to the mounting base 2, the mounting base 2 is provided with an annular track for the operation of the forming module, the flaring cooling water path comprises a flaring main water inlet pipe 301, a flaring main water return pipe 302, a flaring water inlet pipe 303 and a flaring water inlet pipe 304 which are arranged corresponding to each flaring module K,
the main pipe cooling water path comprises a root section main water inlet pipe 401, a root section main water return pipe 402, an annular main water inlet channel 403, an annular main water return channel 404, a main pipe water dividing pipe 405 and a main pipe water dividing and returning pipe 406 which are arranged corresponding to each main pipe module Z;
the total inlet tube 301 of flaring, the total wet return of flaring 302, the total inlet tube 401 of root zone and the total wet return of root zone 402 all are located inside tow chain 5, the total inlet tube 301 of flaring, the total wet return of flaring 302, the total inlet tube 401 of root zone and the total wet return of root zone 402 all are located and connect between rotary joint subassembly 6 and the seat of dividing water 7 to respectively with connect rotary joint subassembly 6 and the seat of dividing water 7 fixed connection,
the annular main water inlet channel 403 and the annular main water return channel 404 are annularly wound outside the fixing bracket 1, the annular main water inlet channel 403 and the annular main water return channel 404 are fixedly connected with the water diversion seat 7,
when the forming module runs along the circular track, the driving device drives the circular main water inlet channel 403 and the circular main water return channel 404 to move synchronously with the module, and the drag chain 5 moves on the fixed bracket 1 around the connecting rotary joint component 6.
The driving device comprises a driving wheel 801, a first driven wheel 802, a second driven wheel 803 and an annular chain 804, wherein the first driven wheel 802, the second driven wheel 803 and the annular chain 804 are meshed with the driving wheel 801, the first driven wheel 802 and the second driven wheel 803 are respectively arranged at two ends of the fixing bracket 1, and the annular chain 804 is wound on the first driven wheel 802 and the second driven wheel 803.
A plurality of connecting pipe connecting seats 9 arranged at intervals are fixed on the annular main water inlet channel 403 and the annular main water return channel 404, and the annular chain 804 is fixedly connected with the annular main water inlet channel 403 and the annular main water return channel 404 through the connecting pipe connecting seats 9.
A flaring module water inlet joint 701, a flaring module water return joint 702, a main pipe module water inlet joint 703 and a main pipe module water return joint 704 are arranged on the water distribution base 7, the flaring module water inlet joint 701 is connected with the flaring module through the flaring water inlet pipe 303, and the flaring module water return joint 702 is connected with the flaring module K through the flaring water inlet pipe 304; the main pipe module water inlet joint 703 is connected with the annular main water inlet channel 403, and the main pipe module water return joint 704 is connected with the annular main water return channel 404.
The annular main water inlet channel 403 and the annular main water return channel 404 are both arranged as annular water pipes wound around the stationary bracket 1.
The connecting pipe connecting seat 9 is connected with the main pipe module Z through the main pipe water dividing and intaking pipe 405 and the main pipe water dividing and returning pipe 406.
The fixing bracket 1 includes a plurality of supporting columns 101 and a top annular tray 102, and the top annular tray 102 is fixed on the mounting base 2 through the plurality of supporting columns 101.
The tow chain 5 is located on the top annular pallet 102 and is movable on the top annular pallet 102.
As shown in fig. 1 and 4, the rotary joint assembly 6 includes a fixed base 601 and a rotary joint 602, the fixed base 601 is fixed on the top annular tray 102, the rotary joint 602 is rotatably mounted on the fixed base 601, the rotary joint 602 and the fixed base 601 are respectively provided with a flaring transition water inlet channel 603, a flaring transition water return channel 604, a main pipe transition water inlet channel 605 and a main pipe transition water return channel 606, the flaring transition water inlet channel 603 is communicated with the flaring main water inlet pipe 301, the flaring transition water return channel 604 is communicated with the flaring main water return pipe 302, the main pipe transition water inlet channel 605 is communicated with the main pipe main water inlet pipe 401, and the flaring transition water return channel 606 is communicated with the water channel of the root main water return pipe 402.
Main pipe cooling water path cooling water circulation track:
water introduced from the outside passes through a main pipe transition water inlet channel 605 of the rotary joint 602, a root section main water inlet pipe 401, a main pipe module water inlet joint 703 of the water diversion seat 7, an annular main water inlet channel 403, one of the connecting pipe connecting seats 9 on the annular water pipe, a main pipe water diversion pipe 405, one of the main pipe modules Z, a main pipe water diversion return pipe 406- (corresponding to the same one of the modules) connecting pipe connecting seat 9, an annular main water return channel 404, a main pipe module water return joint 704 of the water diversion seat 7, a root section main water return pipe 402, and a main pipe transition water return channel 606 of the rotary joint 602.
The flow path of cooling water in the flared cooling water channel is as follows:
water introduced from the outside passes through a flaring transition water inlet channel 603 of the rotary joint 602, a flaring main water inlet pipe 301, a flaring module water inlet joint 701 of the water diversion seat 7, a flaring water inlet branch pipe 303, a flaring module K, a flaring water branch return pipe 304 (corresponding to the same module) and a flaring module water return joint 702 of the water diversion seat 7, and passes through a flaring transition water return channel 604 of the rotary joint 602 to the outside.
Because the driving sprocket for driving the forming module to move along the annular track and the driving wheel 801 of the embodiment are coaxially arranged, when the forming module moves along the annular track, the annular chain 804 of the embodiment drives the annular total water inlet channel 403 and the annular total water return channel 404 to synchronously move along with the module, and one end of the drag chain 5 connected with the rotary joint drives the rotary joint 602 to rotate, so that the drag chain 5 moves on the top annular tray 102 while moving along with the annular chain 804, further the drag chain 5 and the internal pipeline are prevented from being twisted, and the main pipe cooling water channel and the flaring cooling water channel are ensured to cool the forming module which moves along the annular track.
The utility model discloses an among plastic corrugated pipe forming die's water cooling circulation system, the water that introduces from the outside passes through the rotary joint subassembly and divides into two mutually noninterferes, two cooling water routes of circulation alone, is the flaring cooling water route of cooling flaring module, the cooling person in charge's of module cooling water route respectively. The temperature of the main pipe module and the flaring module which correspond to each other is accurately controlled by respectively controlling the temperature of the main pipe cooling water path and the flaring cooling water path, so that the cooling speed of the main pipe and the flaring pipe is controlled, the whole pipe is uniformly cooled, flaring cracking is avoided, the cooling effect for controlling the whole pipe is finally achieved, the production speed is increased, and the quality of the pipe is improved.
The present invention is not limited to the above embodiments, and all improvements made based on the concept, principle, structure and method of the present invention are all within the protection scope of the present invention.
Claims (8)
1. A water cooling circulation system of a plastic corrugated pipe forming die is characterized in that,
comprises a fixed bracket, a flaring cooling water path for cooling the flaring module, a main pipe cooling water path for cooling the main pipe module and a driving device,
the fixed bracket is fixedly connected on the mounting seat, an annular track for the operation of the forming modules is arranged on the mounting seat, the flaring cooling water path comprises a flaring main water inlet pipe, a flaring main water return pipe, a flaring water inlet pipe and a flaring water return pipe which are arranged corresponding to each flaring module,
the main pipe cooling water path comprises a root section main water inlet pipe, a root section main water return pipe, an annular main water inlet channel, an annular main water return channel, a main pipe branch water inlet pipe and a main pipe branch water return pipe, wherein the main pipe branch water inlet pipe and the main pipe branch water return pipe are arranged corresponding to each main pipe module;
the total flaring water inlet pipe, the total flaring water return pipe, the total root section water inlet pipe and the total root section water return pipe are all positioned inside the drag chain, the total flaring water inlet pipe, the total flaring water return pipe, the total root section water inlet pipe and the total root section water return pipe are all positioned between the connecting rotary joint component and the water diversion seat and are respectively fixedly connected with the connecting rotary joint component and the water diversion seat,
the annular main water inlet channel and the annular main water return channel are annularly wound outside the fixed bracket, the annular main water inlet channel and the annular main water return channel are fixedly connected with the water distribution seat,
when the forming module runs along the annular track, the driving device drives the annular main water inlet channel and the annular main water return channel to synchronously move along with the module, and the drag chain moves on the fixed bracket around the connecting rotary joint component.
2. A water cooling circulation system for a plastic bellows forming mold as claimed in claim 1, wherein said driving means comprises a driving wheel, a first driven wheel, a second driven wheel and an endless chain, said first driven wheel and said second driven wheel being engaged with said driving wheel, said first driven wheel and said second driven wheel being respectively provided at both ends of said fixing bracket, said endless chain being wound around said first driven wheel and said second driven wheel.
3. The water cooling circulation system of a plastic corrugated pipe forming die as claimed in claim 2, wherein a plurality of connecting pipe connecting seats are fixed on the annular main water inlet channel and the annular main water return channel at intervals, and the annular chain is fixedly connected with the annular main water inlet channel and the annular main water return channel through the connecting pipe connecting seats.
4. The water cooling circulation system of a plastic corrugated pipe forming die as claimed in claim 3, wherein a flaring module water inlet joint, a flaring module water return joint, a main pipe module water inlet joint and a main pipe module water return joint are provided on the water dividing base, the flaring module water inlet joint is connected to the flaring module through the flaring water dividing pipe, and the flaring module water return joint is connected to the flaring module through the flaring water dividing pipe; the main pipe module water inlet joint is connected with the annular main water inlet channel, and the main pipe module water return joint is connected with the annular main water return channel.
5. A water cooling circulation system for a plastic bellows forming die as claimed in claim 4, wherein the connection pipe connecting base is connected to the main pipe module through the main pipe water inlet pipe and the main pipe water inlet/outlet pipe.
6. A water cooling cycle system for a plastic bellows forming die as claimed in claim 5, wherein said mounting bracket includes a plurality of support posts and a top annular tray, said top annular tray being secured to said mounting block by a plurality of said support posts.
7. A water cooling circulation system for a plastic bellows forming mold as claimed in claim 6, wherein the drag chain is located on and movable on the top annular tray.
8. The water cooling circulation system of a plastic corrugated pipe forming die as claimed in claim 7, wherein the rotary joint assembly includes a fixed base and a rotary joint, the fixed base is fixed on the top annular tray, the rotary joint is rotatably mounted on the fixed base, the rotary joint and the fixed base are respectively provided with a flaring transition water inlet channel, a flaring transition water return channel, a main pipe transition water inlet channel and a main pipe transition water return channel, the flaring transition water inlet channel is communicated with the flaring main water inlet pipe, the flaring transition water return channel is communicated with the flaring main water return pipe, the main pipe transition water inlet channel is communicated with the root segment main water inlet pipe, and the main pipe transition water return channel is communicated with the root segment main water return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123042397.5U CN216423381U (en) | 2021-12-06 | 2021-12-06 | Water cooling circulation system of plastic corrugated pipe forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123042397.5U CN216423381U (en) | 2021-12-06 | 2021-12-06 | Water cooling circulation system of plastic corrugated pipe forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216423381U true CN216423381U (en) | 2022-05-03 |
Family
ID=81342067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123042397.5U Active CN216423381U (en) | 2021-12-06 | 2021-12-06 | Water cooling circulation system of plastic corrugated pipe forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216423381U (en) |
-
2021
- 2021-12-06 CN CN202123042397.5U patent/CN216423381U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106915053A (en) | A kind of device and control method for not shutting down different size tubing of changing the line of production | |
| CN104722591A (en) | Extruding machine for continuously producing metal tubes | |
| CN216423381U (en) | Water cooling circulation system of plastic corrugated pipe forming die | |
| CN102072365A (en) | Method and device for manufacturing plastic composite pipe with flexibly-knitted wire mesh skeleton | |
| CN101456249B (en) | Four compounded rubber extrusion device head | |
| CN101628471A (en) | Bottle making machine | |
| CN105196514A (en) | Extrusion molding mould of online biaxially oriented plastic large diameter pipe | |
| CN205033555U (en) | Extrusion moulding mould of online biaxial orientation plastics heavy -calibre tubular product | |
| CN105109055B (en) | A kind of polymer pipeline jet flow piles up shaped device | |
| CN103192511A (en) | Five composite extrusion heads of rubber extruder | |
| CN101480849B (en) | Method for producing anti-wind, rain and vibration double-helix HDPE cable sheath tube | |
| CN105799180B (en) | A kind of continuous polyethylene winding structure pipe manufacturing equipment | |
| CN203221642U (en) | Five rubber extrusion machine combined head | |
| CN209616296U (en) | A kind of new type plastic pipeline extrusion molding apparatus | |
| CN201253947Y (en) | Fused mass flow regulation apparatus for extruding mould | |
| CN103182774A (en) | Five composite rubber extrusion machine head device | |
| CN203842939U (en) | Extruder for continuously producing metal tubes | |
| CN203221640U (en) | Five rubber extrusion machine combined head device | |
| CN201357562Y (en) | Four-composite rubber extruder head | |
| CN203221641U (en) | Five extrusion machine combined head of rubber extrusion machines | |
| CN108839323B (en) | Plastic pipeline extrusion molding device | |
| CN220314121U (en) | Double-tube co-extrusion adjustment-free extrusion die | |
| CN220219457U (en) | Cooling mechanism for injection molding of electric vehicle | |
| CN220499807U (en) | Automobile brake lamp outer lens injection molding device | |
| CN203919752U (en) | A kind of rubber and plastic forming machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |