CN108189621A - Non-inflatable tyre, the device for making non-inflatable tyre and the method that the non-inflatable tyre is made with the device - Google Patents
Non-inflatable tyre, the device for making non-inflatable tyre and the method that the non-inflatable tyre is made with the device Download PDFInfo
- Publication number
- CN108189621A CN108189621A CN201810098170.6A CN201810098170A CN108189621A CN 108189621 A CN108189621 A CN 108189621A CN 201810098170 A CN201810098170 A CN 201810098170A CN 108189621 A CN108189621 A CN 108189621A
- Authority
- CN
- China
- Prior art keywords
- inflatable tyre
- carcass ply
- main part
- cavity
- centrifugal pan
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 9
- 239000004814 polyurethane Substances 0.000 claims abstract description 9
- 229920002635 polyurethane Polymers 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 208000015943 Coeliac disease Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 210000000981 epithelium Anatomy 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013039 cover film Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
- B29C41/045—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry the axis being placed vertically, e.g. spin casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tires In General (AREA)
Abstract
The present invention relates to non-inflatable tyre fields, disclose a kind of non-inflatable tyre, the method for making the device of non-inflatable tyre and the non-inflatable tyre being made with the device；About the non-inflatable tyre, the main part of its carcass is molded by foaming polyurethane material, side of the main part far from the center of circle is provided with carcass ply, the carcass ply is made of rubber material, the inside of the carcass ply is to being embedded in the main part, and by the structure at the insertion, carcass ply and main part mutually restrict and mutually it is inseparable.The non-inflatable tyre of the present invention, after being embedded in main part due to carcass ply, carcass ply and main part can be restricted mutually and mutually inseparable, therefore can effectively avoid carcass ply by situation about coming off in main part.
Description
Technical field
The present invention relates to non-inflatable tyre field more particularly to a kind of non-inflatable tyre, the devices for making non-inflatable tyre
And the method that the non-inflatable tyre is made with the device.
Background technology
Non-inflatable tyre is a kind of without inflation, and support, resiliency are realized merely with the material and structure of tire itself
A kind of tire of energy since it need not be inflated, can be adapted on many specific devices, can be to avoid inflation
The harm brought that bothers and blow out brought.
As shown in Figure 1, in the Chinese invention patent for being CN1292886C in notification number, in order to solve United States Patent (USP)
It is bad that reliability is combined between non-inflatable tyre cover tire, the inner tube of a tyre and wheel frame disclosed in US2002/0036040A1, cover tire or interior
The problem of tire is easily detached from from tire, it discloses injection expanded materials in a kind of outside periderm film 130 to form interior plies
120 non-inflatable tyre is to need the first molding one in inner tyre frame 110 hollow since the tire is during manufacture
Cover tire epithelium 130, then expanded material is injected by pouring into hole 131 into the cover tire epithelium 130 again, so the technique seems
It is somewhat complex, although the situation that the inner tube of a tyre or cover tire are detached from can be avoided effectively, manufacture cost also due to technique it is cumbersome
And it increased.Therefore, it is necessary to make improvements, design one kind equally can effectively avoid the inner tube of a tyre or cover tire disengaging and can also
Ensure the relatively simple non-inflatable tyre of manufacture craft.
Invention content
It is a primary object of the present invention to provide a kind of the inner tube of a tyre or cover tire can effectively be avoided to be detached from and also ensure making work
The relatively simple non-inflatable tyre of skill, while a kind of device that the pneumatic tire can be made by simple process is also provided, with
And the method that the device is used how to make the non-inflatable tyre.
To achieve the above object, the first aspect of the present invention, provides a kind of non-inflatable tyre, the main part of carcass by
Foaming polyurethane material is molded, and side of the main part far from the center of circle is provided with carcass ply, which is made of rubber material,
The inside of the carcass ply is to being embedded in the main part, and by the structure at the insertion, carcass ply and main part
Mutually restrict and mutually it is inseparable.
Further, on the cross section of the carcass ply, the inner side protrusion of carcass ply is formed with bucking ladder structure,
Carcass ply passes through the bucking ladder structure insertion main part.Wherein, the trapezoidal long base of the bucking ladder structure is located at
Inner side, so as to form a structure for being similar to dovetail so that after carcass ply insertion main part, the two is mutually made
About, an entirety, the situation for effectively preventing carcass ply from coming off are formed.
Further, on the cross section of carcass, the accounting that the carcass ply accounts for entire cross-sectional area is less than 0.4.
The non-inflatable tyre of the present invention since carcass ply is by bucking ladder structure insertion main part, forms similar swallow
The structure of tail tenon, so as to can effectively avoid carcass ply by situation about coming off in main part, in addition, the non-inflatable tyre relative to
Notification number is CN1292886C（Patent No. ZL02147394.3）Chinese patent for, manufacture craft can be simply very much,
Without being first molded hollow outer periderm mould, then fill expanded material, it is only necessary in a mold directly by foaming material shaped in carcass ply
Side.
The second aspect of the present invention provides a kind of device for making non-inflatable tyre, including：
Mold box, including mutually separable or the upper and lower mould of conjunction can be covered, wherein, upper mold and lower die be respectively arranged with upper cavity and
Lower mode cavity；After upper mold and lower die cap close, upper cavity is connected synthesis one with lower mode cavity and is used to be molded the non-inflatable tyre
Annular die cavity；
Centrifuge, positioned at the lower section of the mold box, for the centrifugal pan in the lower die to be driven to make its rotation；
Wherein, the centrifugal pan is located at the center of lower mode cavity in lower die, after upper mold and the conjunction of lower die cap, the side of centrifugal pan surrounding
Edge can be connected by the gap reserved between upper and lower mould with the annular die cavity.
Further, the top of the upper mold corresponds to the centrifugal pan and offers sprue.
By above device, it is only necessary to can be made into the non-inflatable tyre of the present invention by very simple technique.
The third aspect of the present invention provides a kind of method that above-mentioned non-inflatable tyre is made with aforementioned device, packet
Include following steps：
S1, it will be put into the lower mode cavity of mold box lower film by the carcass ply that rubber material is made in advance, cover film later simultaneously
Locking, the outside that carcass ply is made to be located in annular die cavity；
S2, startup centrifuge make centrifugation disc spins；
S3, urethane raw is injected on centrifugal pan from the sprue at the top of upper mold, under the high speed rotation of centrifugal pan, polyurethane
Gap of the raw material between upper and lower mould is dumped into the annular die cavity；
S4, after urethane raw completes foaming in annular die cavity, close centrifuge, after centrifugal pan stops operating, beat
Open the non-inflatable tyre that upper mold taking-up completes.
As it can be seen that the making of the non-inflatable tyre of the present invention can be completed by very simple technique by aforementioned device,
On the one hand the non-inflatable tyre that this method is made can guarantee the reliability that Outer Tyre layer is connected with main part, another
Aspect for notification number is the Chinese patent of CN1292886C, can greatly simplify manufacture craft.
Description of the drawings
Fig. 1 is the structure diagram of the non-inflatable tyre of the prior art described in background technology；
Fig. 2 is the structure diagram of the non-inflatable tyre cited by the embodiment of the present invention 1；
Fig. 3 is enlarged drawing at the A of Fig. 2；
Fig. 4 is the structure diagram of the device of the making non-inflatable tyre cited by the embodiment of the present invention 2；
Fig. 5 is the schematic diagram after the upper die and lower die of device in Fig. 4 close；
Fig. 6 is the longitudinal sectional drawing of Fig. 5；
Fig. 7 is to be put into the schematic diagram after carcass ply in annular die cavity in figure 6；
In figure label for：110- inner tyre frames, plies in 120-, 130- cover tire epitheliums, 131- pour into hole；
11- main parts, 12- carcass ply, 121- bucking ladder structures；
21- mold boxes, 211- upper molds, 212- lower dies, 213- annular die cavities, 2131- upper cavities, 2132- lower mode cavities, 22- centrifugations
Machine, 23- centrifugal pans, 24- gaps, 25- sprues.
Specific embodiment
The present invention is described in further detail, but embodiments of the present invention are not limited to reference to specific embodiment
This.
Embodiment 1：
As shown in Figures 2 and 3, to present embodiments provide a kind of non-inflatable tyre, the main part 11 of carcass is by polyurethane material
Expect foaming, side of the main part 11 far from the center of circle is provided with carcass ply 12, which is made of rubber material, institute
The inside of carcass ply 12 is stated to being embedded in the main part 11, and by the structure at the insertion, carcass ply 12 and main body
Part 11 mutually restrict and mutually it is inseparable.
Since rubber material has the advantages that wear-resisting, on-slip, hydrolysis, but there is weight weight again simultaneously, do not have lacking for elasticity
Point, and polyurethane material（That is PU）Just have the advantages that light-weight, resilience is good, but simultaneously but with not hydrolysis, no
The shortcomings that wear-resisting.Therefore, the present embodiment respectively takes its advantage, and the two is combined, and main part 11 is alleviated using polyurethane material
The weight of tire, the resilience for increasing tire, play improve damping effect and increase comfort effect, and carcass ply 12 by
In long-term and ground friction, the advantages of selecting rubber material that can utilize rubber wear-resisting, on-slip, hydrolysis.
Preferably, the inner side protrusion of carcass ply 12 is formed with bucking ladder structure 121, and carcass ply 12 passes through the bucking ladder
Structure 121 is embedded in the main part 11.Specifically, being seen by the cross section of carcass ply 12, carcass ply 12 substantially assumes a " convex " shape,
It includes two-stage step face, wherein, the larger step surface of area is located remotely from the side in the center of circle, two sideline phases of the step surface
Mutually vertical, the smaller step surface of area is located at close to the side in the center of circle, and the angle in two sidelines of the step surface is less than 90 °, by
This, carcass ply 12 forms a structure for being similar to dovetail, and the structure is after embedded main part 11 so that 12 He of carcass ply
Main part 11 can be restricted mutually, will not delamination, the situation for effectively preventing carcass ply 12 from coming off.
Preferably, on the cross section of carcass, the accounting that the carcass ply 12 accounts for whole cross section area is less than 0.4, so as to
Ensure that the accounting of main part 11 is larger, and main part 11 is made of lighter weight, the preferable polyurethane material of resilience, from
And it can effectively mitigate the weight of tire and enhance the resilience of tire.
The non-inflatable tyre of the present embodiment can be used in the tool that bicycle, wheelchair etc. slowly run or equipment.
Embodiment 2：
As Figure 4-Figure 7, a kind of device for making non-inflatable tyre is present embodiments provided, including：
Mold box 21, the upper and lower mould 211,212 including mutually separating or can cover conjunction, wherein, upper mold 211 is divided with lower die 212
It is not provided with upper cavity 2131 and lower mode cavity 2132；After upper mold 211 and the lid of lower die 212 close, upper cavity 2131 and lower mode cavity
2132 linking synthesis one are used to be molded the annular die cavity 213 of the non-inflatable tyre；
Centrifuge 22, positioned at the lower section of the mold box 21, for the centrifugal pan 23 in the lower die 212 to be driven to make its rotation；
Wherein, the centrifugal pan 23 is located at the center of lower mode cavity 2132 in lower die 2132, when upper mold 211 and the lid of lower die 212 are closed
Afterwards, the edge of 23 surrounding of centrifugal pan can connect by the gap 24 reserved between upper and lower mould 211,212 with the annular die cavity 23
It is logical.
Preferably, the top of the upper mold 211 corresponds to the centrifugal pan 23 and offers sprue 25.
The device of the present embodiment can be used for making the non-inflatable tyre of embodiment 1.It, need to be according to embodiment 1 before making
The shape of non-inflatable tyre and the concrete shape for specifically setting 2132 cavity of upper cavity 2131 and lower mode cavity.
Embodiment 3：
Present embodiments provide with embodiment 2 device make embodiment 1 non-inflatable tyre method, this method include with
Lower step：
S1, the carcass ply 12 made in advance by rubber material is put into the lower mode cavity 2132 of 21 lower film 212 of mold box, later
It covers film 211 and locks, the outside that carcass ply 12 is made to be located in annular die cavity 213, as shown in Figure 7；
S2, startup centrifuge 22 rotate centrifugal pan 23；
S3, the sprue 25 from 211 top of upper mold inject urethane raw on centrifugal pan 23, in the high speed rotation of centrifugal pan 23
Under, gap 24 of the urethane raw between upper and lower mould 211,212 is dumped into the annular die cavity 23；
S4, after completion foaming, centrifuge 22 is closed, centrifugal pan 23 stops operating in annular die cavity 23 after urethane raw
Afterwards, it opens upper mold 211 and takes out the non-inflatable tyre to complete.
Wherein, the rotational time of centrifugal pan 23 is about 3-5 minutes in manufacturing process.
The non-inflatable tyre of embodiment 1 is made of this method, technique is relatively simple, is relative to notification number
For the Chinese patent of CN1292886C, without being first molded hollow outer periderm mould, then fill expanded material, manufacture craft is simplified,
Only need in mold box 21 directly by foaming material shaped in the inside of carcass ply 12, the non-inflatable tyre being fabricated to equally has
There is the advantages of ectonexine is not easily to fall off.
Claims (6)
1. non-inflatable tyre, the main part of carcass（11）It is molded by foaming polyurethane material, main part（11）Far from the center of circle
Side be provided with carcass ply（12）, the carcass ply（12）It is made of rubber material, which is characterized in that the carcass ply（12）'s
Inside is to being embedded in the main part（11）, and by the structure at the insertion, carcass ply（12）And main part（11）
Mutually restrict and mutually it is inseparable.
2. non-inflatable tyre according to claim 1, which is characterized in that in the carcass ply（12）Cross section on, outside
Plies（12）Inner side protrusion is formed with bucking ladder structure（121）, carcass ply（12）Pass through the bucking ladder structure（121）It is embedding
Enter the main part（11）.
3. non-inflatable tyre according to claim 1, which is characterized in that on the cross section of carcass, the carcass ply
（12）The accounting for accounting for entire cross-sectional area is less than 0.4.
4. make the device of non-inflatable tyre, which is characterized in that including：
Mold box（21）, the upper and lower mould including mutually separating or can cover conjunction（211、212）, wherein, upper mold（211）With lower die
（212）It is respectively arranged with upper cavity（2131）And lower mode cavity（2132）；Work as upper mold（211）With lower die（212）Gai Hehou, upper cavity
（2131）With lower mode cavity（2132）Linking synthesis one is used to be molded the annular die cavity of the non-inflatable tyre（213）；
Centrifuge（22）, positioned at the mold box（21）Lower section, for driving the lower die（212）Interior centrifugal pan（23）Make
It is rotated；
Wherein, the centrifugal pan（23）Positioned at lower die（2132）Interior lower mode cavity（2132）Center, work as upper mold（211）With lower die
（212）Gai Hehou, centrifugal pan（23）It the edge of surrounding can be by upper and lower mould（211、212）Between reserve gap（24）With it is described
Annular die cavity（23）Connection.
5. the device according to claim 4 for making non-inflatable tyre, which is characterized in that the upper mold（211）Top
The corresponding centrifugal pan（23）Offer sprue（25）.
6. the method for the non-inflatable tyre described in claim 2 is made with the device described in claim 5, which is characterized in that
Include the following steps：
S1, the carcass ply that will be made in advance by rubber material（12）It is put into mold box（21）Lower film（212）Lower mode cavity
（2132）It is interior, film is covered later（211）And lock, make carcass ply（12）Positioned at annular die cavity（213）Interior outside；
S2, start centrifuge（22）Make centrifugal pan（23）Rotation；
S3, by upper mold（211）The sprue at top（25）To centrifugal pan（23）Upper injection urethane raw, in centrifugal pan（23）'s
Under high speed rotation, urethane raw is via upper and lower mould（211、212）Between gap（24）It is dumped into the annular die cavity
（23）It is interior；
S4, after urethane raw after completion foaming, centrifuge is closed in annular die cavity (23)（22）, centrifugal pan（23）Stop
After rotation stop is moved, upper mold is opened（211）Take out the non-inflatable tyre to complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098170.6A CN108189621A (en) | 2018-01-31 | 2018-01-31 | Non-inflatable tyre, the device for making non-inflatable tyre and the method that the non-inflatable tyre is made with the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098170.6A CN108189621A (en) | 2018-01-31 | 2018-01-31 | Non-inflatable tyre, the device for making non-inflatable tyre and the method that the non-inflatable tyre is made with the device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108189621A true CN108189621A (en) | 2018-06-22 |
Family
ID=62592167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810098170.6A Pending CN108189621A (en) | 2018-01-31 | 2018-01-31 | Non-inflatable tyre, the device for making non-inflatable tyre and the method that the non-inflatable tyre is made with the device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108189621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169060A (en) * | 2018-11-12 | 2020-05-19 | 广州科济化学材料有限公司 | Manufacturing process for pouring polyurethane foaming inflation-free wheel in outer tire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413847A (en) * | 2001-10-26 | 2003-04-30 | 参联国际贸易有限公司 | Method for manufacturing solid tyre which with foaming material in it and its device |
| JP2004174844A (en) * | 2002-11-26 | 2004-06-24 | Nisshinbo Ind Inc | Method for manufacturing solid tire and its fixture |
| US20040261925A1 (en) * | 2003-06-30 | 2004-12-30 | Shun-Min Chen | Non-inflatable tire and manufacture method thereof |
| CN200957744Y (en) * | 2006-08-30 | 2007-10-10 | 参联国际贸易有限公司 | Solid tyre |
| CN205381096U (en) * | 2016-02-16 | 2016-07-13 | 唐煜 | Opening locking formula exempts from to aerify explosion -proof tire |
| CN208085408U (en) * | 2018-01-31 | 2018-11-13 | 四川阿斯特医疗器械有限公司 | Non-inflatable tyre |
-
2018
- 2018-01-31 CN CN201810098170.6A patent/CN108189621A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413847A (en) * | 2001-10-26 | 2003-04-30 | 参联国际贸易有限公司 | Method for manufacturing solid tyre which with foaming material in it and its device |
| JP2004174844A (en) * | 2002-11-26 | 2004-06-24 | Nisshinbo Ind Inc | Method for manufacturing solid tire and its fixture |
| US20040261925A1 (en) * | 2003-06-30 | 2004-12-30 | Shun-Min Chen | Non-inflatable tire and manufacture method thereof |
| CN200957744Y (en) * | 2006-08-30 | 2007-10-10 | 参联国际贸易有限公司 | Solid tyre |
| CN205381096U (en) * | 2016-02-16 | 2016-07-13 | 唐煜 | Opening locking formula exempts from to aerify explosion -proof tire |
| CN208085408U (en) * | 2018-01-31 | 2018-11-13 | 四川阿斯特医疗器械有限公司 | Non-inflatable tyre |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169060A (en) * | 2018-11-12 | 2020-05-19 | 广州科济化学材料有限公司 | Manufacturing process for pouring polyurethane foaming inflation-free wheel in outer tire |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180622 |