CN107838218A - A kind of bar extrusion molding dies with holes - Google Patents
A kind of bar extrusion molding dies with holes Download PDFInfo
- Publication number
- CN107838218A CN107838218A CN201711445279.4A CN201711445279A CN107838218A CN 107838218 A CN107838218 A CN 107838218A CN 201711445279 A CN201711445279 A CN 201711445279A CN 107838218 A CN107838218 A CN 107838218A
- Authority
- CN
- China
- Prior art keywords
- bar
- rod seat
- core rod
- core
- die body
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of bar extrusion molding dies with holes, die body is molded including core rod seat, core bar and bar, the core rod seat is disk core rod seat, its outermost away from center of circle direction is provided with the fixed part of protrusion, the core rod seat is removably fixed in the top of bar shaping die body and covers all bar by fixed part is molded die body, the core bar is passed through and is assemblied in the axial centre of core rod seat, and the core bar is suspended vacantly in the inside of bar shaping die body through bar shaping die body and by core rod seat.The bar extrusion molding dies with holes of the present invention, the fixed part of protrusion is provided with core rod seat, core rod seat can cover all bar by fixed part and be molded die body, gap is not present between core rod seat and die body, core rod seat caused by avoiding gap buildup can not be taken out the problem of can not being cleaned up with mould, so as to avoid product dirtyization.
Description
Technical field
The invention belongs to field of machining, more particularly to a kind of bar extrusion molding dies with holes.
Background technology
Powder metallurgy is an important forming parts technology, and the emergence of New Technologies In Powder Metallu Rgy, new technology will
Promote the fast development of high-tech industry, will also bring material engineering and the prospect of manufacturing technology light.At present, China's powder
Metallurgy industry overall technology low SI, technological equipment fall behind, and larger gap be present compared with advanced foreign technology is horizontal.Powder
Metallurgical Tool and Die Technology is one of key technology of production and Developing Powder Metallurgy machine components, the height of die life not only shadow
Product quality is rung, has an effect on production efficiency.Therefore, the research of New Technologies In Powder Metallu Rgy is greatly developed, to improving China's powder smelting
The class and technical merit of golden product, shorten and had very important significance with the gap of Foreign Advanced Lerel.
Problems be present in existing bar extrusion molding dies with holes：1）Increase during throat-fed with the pressure of press
Greatly, the easy buildup in gap between core rod seat and die body, causing core rod seat can not take out even mould can not clean up out
Existing product dirtyization；2）The locating core rod aperture morpheme position of fixture and the fixation of profile morpheme position are depended merely in the fixation of core bar,
When working long hours, easily there is swing offset in the position of core bar and the position of die body, cause product to produce deviation；3）Mould exists
Because power acts in pressing process, only disassemble mould from press with manpower after having used wastes time and energy very much.
The content of the invention
The technical problems to be solved by the invention are to overcome the shortcomings of to mention in background above technology and defect, there is provided one
Kind bar extrusion molding dies with holes.
In order to solve the above technical problems, technical scheme proposed by the present invention is a kind of bar extrusion forming mold with holes of offer
Tool, including core rod seat, core bar and bar shaping die body, the core rod seat is disk core rod seat, its outermost away from center of circle direction
Side is provided with the fixed part of protrusion, and the core rod seat is removably fixed in the top of bar shaping die body by fixed part and covered completely
Bar shaping die body is covered, the core bar passes through and is assemblied in the axial centre of core rod seat, and the core bar passes through bar shaping mould
Body is simultaneously suspended vacantly the inside that die body is molded in bar by core rod seat.The fixed part of protrusion, core rod seat are provided with core rod seat
Bar can be covered all by fixed part and be molded die body, gap is not present between core rod seat and die body, avoids gap buildup
Caused core rod seat can not be taken out the problem of can not being cleaned up with mould, so as to avoid product dirtyization.
Above-mentioned bar extrusion molding dies with holes, it is preferred that the core rod seat is by concentric outer toroid and inner circle ring group
Into, connected between the outer toroid and interior annular by bar shaped connecting portion and reserve axial direction material channel.Outer toroid and inner circle
The combination of ring, it can not only realize that core bar is accurately assemblied in the axial centre of core rod seat, and lacking between outer toroid and interior annular
Mouth can be used as material inlet passage.
Preferably, the core bar includes extruder connecting portion, core rod seat connecting portion, core bar connecting portion and the rod being sequentially connected
Material is molded core bar, and the extruder connecting portion is provided with the external screw thread to match with extruder, and the core rod seat connecting portion is through simultaneously
The interior annular of core rod seat is assemblied in, the core bar connecting portion is more than in the interior annular of core rod seat close to the cross-sectional diameter of core rod seat
Footpath.The structure is advantageous to being fixedly connected for core bar, core rod seat and extruder, and facilitates disassembly and installation.
It is furthermore preferred that the core rod seat connecting portion in core rod seat interior annular with being equipped with axial locating slot, the positioning
The latch of controllable core bar and core rod seat relative rotary displacement is provided with groove.By latch, core bar and core rod seat can be effectively avoided
Relative rotary displacement is produced so as to avoid product error.
Above-mentioned bar extrusion molding dies with holes, it is preferred that during the bar shaping die body is provided with along its axial centre
Empty funnel-form inner chamber, the core bar sequentially pass through the charging aperture and discharging opening of funnel-form inner chamber.The horn mouth of funnel-form inner chamber
Side is charging aperture, and tubule mouth side is discharging opening, be easy to material collected by horn mouth into tubule mouth in extrusion forming.
Preferably, discharging opening side is provided with dismountable core bar fixture in the funnel-form inner chamber, and the core bar passes through
Core bar fixture is suspended vacantly in funnel-form inner chamber.By core bar fixture, not only contribute to core bar and be suspended vacantly avoid core
Bar is subjected to displacement so as to avoid product error.
Preferably, the bar shaping die body includes big the cylinder die body and small column die body being sequentially connected, the great circle
The cross-sectional diameter of post die body is more than the cross-sectional diameter of small column die body, the charging aperture and discharging opening point of the funnel-form inner chamber
Not She Yu big cylinder die body and small column die body inside, the axle of the funnel-form inner chamber, big cylinder die body and small column die body
To center on same straight line.The design of size cylinder die body alleviates the weight of die body, is easy to identify charging aperture and discharging
Mouthful, conveniently remove and install.
It is furthermore preferred that the outer surface bottom of the small column die body is available for the breach that spanner is puted forth effort provided with least two.
The breach is easy to spanner to put forth effort, and solving the problems, such as that mould is pulled down from press wastes time and energy.
It is furthermore preferred that it is provided with and the core rod seat size phase above the charging aperture of the big cylinder die body inner funnel shape inner chamber
The limiting stand of matching, the fixed part of the core rod seat are removably fixed in the top of limiting stand.Core rod seat body is placed in limiting stand
Interior, the fixed part of protrusion is completely covered on the top of limiting stand, has both avoided core rod seat and has been subjected to displacement, turn avoid core rod seat and
Gap between die body be present, can not be cleaned up with mould so as to solve the problems, such as that core rod seat can not take out.
It is furthermore preferred that the limiting stand and/or core rod seat fixed part are provided with its contact surface and are available for instrument to tilt core rod seat
Groove.The design of groove is more convenient for the dismounting of core rod seat, is easy to the cleaning of core rod seat and mould.
Compared with prior art, beneficial effects of the present invention are：
1st, bar extrusion molding dies with holes of the invention, are provided with the fixed part of protrusion on core rod seat, and core rod seat passes through fixation
Portion can cover all bar shaping die body, and gap is not present between core rod seat and die body, avoids core caused by the buildup of gap
Pole socket can not be taken out the problem of can not being cleaned up with mould, so as to avoid product dirtyization.
2nd, bar extrusion molding dies with holes of the invention, it is provided with axially on core rod seat connecting portion and core rod seat interior annular
Locating slot and latch, while coordinate core bar fixture that core bar is suspended vacantly in funnel-form inner chamber, can effectively avoid core bar
Relative rotary displacement is produced with core rod seat so as to avoid product error.
3rd, bar extrusion molding dies with holes of the invention, it is provided with the outer surface of bar shaping die body and is available for spanner
The breach of power, is easy to spanner to put forth effort, and solving the problems, such as that mould is pulled down from press wastes time and energy.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is present invention bar squeezing moulded mould structure schematic isometric with holes.
Fig. 2 is present invention bar squeezing moulded mould structure constructed profile with holes.
Fig. 3 is present invention bar extrusion molding dies assembling schematic isometric with holes.
Fig. 4 is present invention bar extrusion molding dies assembling constructed profile with holes.
Fig. 5 is the structural representation stereogram of core rod seat of the present invention.
Fig. 6 is the top view of core rod seat of the present invention.
Fig. 7 is the structural representation profile of core rod seat of the present invention.
Fig. 8 is the structural representation stereogram of core bar of the present invention.
Fig. 9 is the front view of core bar of the present invention.
Figure 10 is the structural representation profile of core bar of the present invention.
Figure 11 is the structural representation stereogram of bar shaping die body of the present invention.
Figure 12 is the top view of bar shaping die body of the present invention.
Figure 13 is the structural representation profile of bar shaping die body of the present invention.
Figure 14 is the structural representation stereogram of latch of the present invention.
Figure 15 is the structural representation stereogram of core bar fixture of the present invention.
Figure 16 is the top view of core bar fixture of the present invention.
Marginal data：
1st, core rod seat；2nd, core bar；3rd, bar shaping die body；4th, core bar fixture；5th, latch；6th, locating slot；7th, groove；11st, it is solid
Determine portion；12nd, outer toroid；13rd, interior annular；14th, bar shaped connecting portion；15th, material channel；21st, extruder connecting portion；22nd, core rod seat
Connecting portion；23rd, core bar connecting portion；24th, bar shaping core bar；31st, funnel-form inner chamber；32nd, big cylinder die body；33rd, small column mould
Body；311st, charging aperture；312nd, discharging opening；321st, limiting stand；331st, breach.
Embodiment
For the ease of understanding the present invention, the present invention is done below in conjunction with Figure of description and preferred embodiment more complete
Face, meticulously describe, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood that implication phase with those skilled in the art
Together.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to the limitation present invention's
Protection domain.
Unless otherwise specified, various raw material, the instrument and equipment etc. used in the present invention can be purchased by market
It can buy or can be prepared by existing method.
Embodiment：
A kind of bar extrusion molding dies with holes of the invention, such as Fig. 1-16, including core rod seat 1, core bar 2 and bar shaping die body
3, core rod seat 1 is disk core rod seat, and its outermost away from center of circle direction is provided with the fixed part 11 of protrusion, and core rod seat 1 passes through solid
Determine portion 11 to be removably fixed in the top of bar shaping die body 3 and cover all bar shaping die body 3, core bar 2 is passed through and filled
Axial centre assigned in core rod seat 1, core bar 2 are suspended vacantly in bar shaping mould through bar shaping die body 3 and by core rod seat 1
The inside of body 3.Gap is not present between core rod seat and die body, core rod seat caused by avoiding gap buildup can not take out and mould
The problem of can not cleaning up, so as to avoid product dirtyization.
The bar extrusion molding dies with holes of the present invention, core rod seat 1 are made up of concentric outer toroid 12 and interior annular 13, outside
Connected between annulus 12 and interior annular 13 by bar shaped connecting portion 14 and reserve the material channel 15 of axial direction.Outer toroid 12 and inner circle
The combination of ring 13, it can not only realize that core bar 2 is accurately assemblied in the axial centre of core rod seat 1, and outer toroid 12 and interior annular 13
Between breach can be used as material inlet passage.
The bar extrusion molding dies with holes of the present invention, core bar 2 include extruder connecting portion 21, the core rod seat being sequentially connected
Connecting portion 22, core bar connecting portion 23 and bar shaping core bar 24, extruder connecting portion 21 are provided with the outer spiral shell to match with extruder
Line, core rod seat connecting portion 22 pass through and are assemblied in the interior annular 13 of core rod seat, and core bar connecting portion 23 is close to the cross section of core rod seat 1
Diameter is more than the internal diameter of interior annular 13 of core rod seat 1, and the structure is advantageous to core bar 2, core rod seat 1 is fixedly connected with extruder, and
Facilitate disassembly and installation；Axial locating slot 6 is equipped with core rod seat connecting portion 22 and core rod seat interior annular 13, in locating slot 6
Latch 5 provided with controllable core bar 2 Yu the relative rotary displacement of core rod seat 1, core bar 2 and core rod seat 1 can effectively be avoided by latch 5
Relative rotary displacement is produced so as to avoid product error.
The bar extrusion molding dies with holes of the present invention, bar shaping die body 3 are provided with hollow funnel along its axial centre
Shape inner chamber 31, core bar 2 sequentially pass through the charging aperture 311 and discharging opening 312 of funnel-form inner chamber；Discharging opening in funnel-form inner chamber 31
312 sides are provided with dismountable core bar fixture 4, and core bar 2 is suspended vacantly in funnel-form inner chamber 31 by core bar fixture 4；
Bar shaping die body 3 includes big the cylinder die body 32 and small column die body 33 being sequentially connected, and the cross section of big cylinder die body 32 is straight
Footpath is more than the cross-sectional diameter of small column die body 33, and the charging aperture 311 and discharging opening 312 of funnel-form inner chamber 31 are respectively arranged on great circle
The inside of post die body 32 and small column die body 33, in the axial direction of funnel-form inner chamber 31, big cylinder die body 32 and small column die body 33
The heart on same straight line, be easy to be fixedly mounted on extruder, also reduces the weight of die body by the design of size cylinder die body,
It is easy to identify charging aperture 311 and discharging opening 312, conveniently removes and installs；The outer surface bottom of small column die body 33 is provided with extremely
Few two breach 331 for being available for spanner to put forth effort, the breach 331 are easy to spanner to put forth effort, solve mould pulled down from press it is time-consuming
The problem of laborious；The top of charging aperture 311 of the big inner funnel shape inner chamber 31 of cylinder die body 32 is provided with what is matched with the size of core rod seat 1
Limiting stand 321, the fixed part 11 of core rod seat 1 are removably fixed in the top of limiting stand 321, and the body of core rod seat 1 is placed in limiting stand
Interior, the fixed part 11 of protrusion is completely covered on the top of limiting stand 321, has both avoided core rod seat 1 and has been subjected to displacement, turn avoid core
Gap be present between pole socket 1 and die body, can not be cleaned up with mould so as to solve the problems, such as that core rod seat 1 can not take out；Limit
Position platform 321 and/or core rod seat fixed part 11 are provided with the groove 7 for being available for instrument to tilt core rod seat, the design of groove 7 in its contact surface
It is more convenient for the dismounting of core rod seat 1, is easy to the cleaning of core rod seat 1 and mould.
Core bar fixture 4 is in fan-shaped cylinder, and size and the discharging opening 312 of funnel-form inner chamber 31 match, and it is provided with and rod
The axially extending bore of material shaping core bar 24 size matching, the breach that sector is formed are easy to disassemble.
The application method of the bar extrusion molding dies with holes of the present invention is as follows：Core bar is passed through into core rod seat, aliging, it is fixed
Position groove simultaneously inserts latch in locating slot, is fixed on by the external screw thread of core bar extruder connecting portion on press, bar forming core
Bar penetrates the charging aperture and discharging opening of funnel-form inner chamber successively, and is suspended vacantly by the through hole of core bar fixture in funnel-form
In chamber, and the limiting stand that bar is molded to die body match clamping with core rod seat, and unlatching extruder injects metallurgical material, in funnel-form
Chamber pulls down core bar fixture when filling up material, carry out continuous-flow type powder metallurgy；With on instrument clamping rod material shaping die body after end
Breach, bar extrusion molding dies with holes are backed out from extruder, with instrument by groove tilt core rod seat, extract latch,
By the shaping die body separation of core rod seat, core bar and bar, cleaned.
Generally speaking, bar extrusion molding dies with holes of the invention, the fixed part of protrusion, core bar are provided with core rod seat
Seat can cover all bar by fixed part and be molded die body, and gap is not present between core rod seat and die body, avoid gap product
Core rod seat caused by material can not be taken out the problem of can not being cleaned up with mould, so as to avoid product dirtyization；Connect in core rod seat
Socket part is provided with the locating slot and latch of axial direction with core rod seat interior annular, while coordinates core bar fixture to be suspended vacantly core bar
In funnel-form inner chamber, core bar can be effectively avoided to produce relative rotary displacement with core rod seat so as to avoid product error；Bar into
The outer surface of pattern body is provided with and is available for the breach that spanner is puted forth effort, and is easy to spanner to put forth effort, solves mould and expense is pulled down from press
When it is laborious the problem of.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of bar extrusion molding dies with holes, including core rod seat（1）, core bar（2）Die body is molded with bar（3）, its feature
It is, the core rod seat（1）For disk core rod seat, its outermost away from center of circle direction is provided with the fixed part of protrusion（11）, institute
State core rod seat（1）Pass through fixed part（11）It is removably fixed in bar shaping die body（3）Top and cover all bar into
Pattern body（3）, the core bar（2）Pass through and be assemblied in core rod seat（1）Axial centre, the core bar（2）It is molded through bar
Die body（3）And pass through core rod seat（1）It is suspended vacantly and is molded die body in bar（3）Inside.
2. bar extrusion molding dies with holes according to claim 1, it is characterised in that the core rod seat（1）By concentric
Outer toroid（12）And interior annular（13）Composition, the outer toroid（12）And interior annular（13）Between pass through bar shaped connecting portion（14）
Connect and reserve the material channel of axial direction（15）.
3. bar extrusion molding dies with holes according to claim 2, it is characterised in that the core bar（2）Including successively
The extruder connecting portion of connection（21）, core rod seat connecting portion（22）, core bar connecting portion（23）Core bar is molded with bar（24）, it is described
Extruder connecting portion（21）Provided with the external screw thread to match with extruder, the core rod seat connecting portion（22）Pass through and be assemblied in core
Pole socket（1）Interior annular（13）, the core bar connecting portion（23）Close to core rod seat（1）Cross-sectional diameter be more than core rod seat（1）
Interior annular（13）Internal diameter.
4. bar extrusion molding dies with holes according to claim 3, it is characterised in that the core rod seat connecting portion（22）
With core rod seat interior annular（13）On be equipped with axial locating slot（6）, the locating slot（6）It is interior to be provided with controllable core bar（2）With
Core rod seat（1）The latch of relative rotary displacement（5）.
5. the bar extrusion molding dies with holes according to any one of claim 1-4, it is characterised in that the bar into
Pattern body（3）Hollow funnel-form inner chamber is provided with along its axial centre（31）, the core bar（2）Sequentially pass through funnel-form inner chamber
（31）Charging aperture（311）And discharging opening（312）.
6. bar extrusion molding dies with holes according to claim 5, it is characterised in that the funnel-form inner chamber（31）In
Discharging opening（312）Side is provided with dismountable core bar fixture（4）, the core bar（2）Pass through core bar fixture（4）It is suspended vacantly
In funnel-form inner chamber（31）In.
7. bar extrusion molding dies with holes according to claim 5, it is characterised in that the bar is molded die body（3）
Including the big cylinder die body being sequentially connected（32）With small column die body（33）, the big cylinder die body（32）Cross-sectional diameter it is big
In small column die body（33）Cross-sectional diameter, the funnel-form inner chamber（31）Charging aperture（311）And discharging opening（312）Respectively
Located at big cylinder die body（32）With small column die body（33）Inside, the funnel-form inner chamber（31）, big cylinder die body（32）With
Small column die body（33）Axial centre on same straight line.
8. bar extrusion molding dies with holes according to claim 7, it is characterised in that the small column die body（33）'s
Outer surface bottom is available for the breach that spanner is puted forth effort provided with least two（331）.
9. bar extrusion molding dies with holes according to claim 7, it is characterised in that the big cylinder die body（32）It is interior
Funnel-form inner chamber（31）Charging aperture（311）Top is provided with and the core rod seat（1）The limiting stand that size matches（321）, institute
State core rod seat（1）Fixed part（11）It is removably fixed in limiting stand（321）Top.
10. bar extrusion molding dies with holes according to claim 9, it is characterised in that the limiting stand（321）With/
Or core rod seat fixed part（11）Being provided with its contact surface is available for instrument to tilt core rod seat（1）Groove（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445279.4A CN107838218A (en) | 2017-12-27 | 2017-12-27 | A kind of bar extrusion molding dies with holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445279.4A CN107838218A (en) | 2017-12-27 | 2017-12-27 | A kind of bar extrusion molding dies with holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107838218A true CN107838218A (en) | 2018-03-27 |
Family
ID=61684442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711445279.4A Pending CN107838218A (en) | 2017-12-27 | 2017-12-27 | A kind of bar extrusion molding dies with holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107838218A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428612A (en) * | 2020-11-10 | 2021-03-02 | 万基控股集团石墨制品有限公司 | Hollow graphite electrode extrusion die |
| CN114407420A (en) * | 2022-01-14 | 2022-04-29 | 西北工业大学 | Multilayer cylindrical sandwich propellant, preparation mold and preparation method |
-
2017
- 2017-12-27 CN CN201711445279.4A patent/CN107838218A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428612A (en) * | 2020-11-10 | 2021-03-02 | 万基控股集团石墨制品有限公司 | Hollow graphite electrode extrusion die |
| CN114407420A (en) * | 2022-01-14 | 2022-04-29 | 西北工业大学 | Multilayer cylindrical sandwich propellant, preparation mold and preparation method |
| CN114407420B (en) * | 2022-01-14 | 2024-03-26 | 西北工业大学 | Multilayer cylindrical sandwich propellant, preparation mold and preparation method |
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Application publication date: 20180327 |