CN112454722A - Plastic granulation equipment for PVC pipe machining - Google Patents
Plastic granulation equipment for PVC pipe machining Download PDFInfo
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- CN112454722A CN112454722A CN202110061260.XA CN202110061260A CN112454722A CN 112454722 A CN112454722 A CN 112454722A CN 202110061260 A CN202110061260 A CN 202110061260A CN 112454722 A CN112454722 A CN 112454722A
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- Prior art keywords
- pair
- vibration
- pipe
- machine barrel
- butt joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
Abstract
The invention discloses plastic granulation equipment for processing PVC (polyvinyl chloride) pipes, which comprises a main machine body, a machine barrel, a heating casing, a feed hopper and a forming die, wherein the machine barrel is arranged in the center of the main machine body, the heating casing is sleeved on the machine barrel and is connected with the main machine body, the feed hopper is arranged at one end of the main machine body and is communicated with one end of the machine barrel, the forming die is arranged at the end part of the machine barrel, and an automatic auxiliary material adding mechanism is arranged on the machine barrel and positioned on one side of the feed hopper; the plastic granulating equipment for processing the PVC pipes has the advantages of simple structure and convenience in operation, auxiliary material weight can be automatically weighed through the combination of the storage structure, the vibration blanking structure and the weighing structure, and the auxiliary material can be automatically and uniformly scattered into the machine barrel through the vibration blanking structure.
Description
Technical Field
The invention relates to the technical field of PVC pipe processing, in particular to plastic granulation equipment for PVC pipe processing.
Background
Polyvinyl chloride, abbreviated as PVC in english, is a polymer obtained by polymerizing Vinyl Chloride Monomer (VCM) in the presence of an initiator such as peroxide and azo compound or in the presence of light or heat according to a radical polymerization mechanism. And PVC tubular product uses the extruder to produce more in carrying out the course of working, and in order to satisfy the purpose that make full use of retrieved plastic material, therefore this part adopts the plastic granulator more to process, also can add the plastics granulation in the current PVC pipe, in order to increase recycle efficiency, and current plastics granulation is in the course of working, need add certain auxiliary material and just can satisfy the production requirement of PVC tubular product, but current plastic granulator only is equipped with a feed inlet, it is more troublesome when adding the auxiliary material, and cause the not qualified performance of local tubular product easily.
Disclosure of Invention
The invention aims to solve the problems, designs a plastic granulating device for processing PVC pipes, and solves the problems of the prior art.
The technical scheme of the invention for realizing the aim is as follows: a plastic granulation device for processing PVC pipes comprises a main machine body, a machine barrel, a heating casing, a feeding hopper and a forming die, wherein the machine barrel is arranged in the center of the main machine body, the heating casing is sleeved on the machine barrel and is connected with the main machine body, the feeding hopper is installed at one end of the main machine body and is communicated with one end of the machine barrel, the forming die is installed at the end part of the machine barrel, and an automatic auxiliary material adding mechanism is arranged on the machine barrel and positioned on one side of the feeding hopper;
the auxiliary material automatic adding mechanism consists of a material storage structure, a vibration blanking structure and a weighing structure;
the vibration blanking structure comprises: the device comprises a charging opening, a butt-joint groove, a vibration passing pipe, a pair of vibration motors, a plurality of inserted rods, a plurality of vibration springs and a blanking inclined plate;
the feed inlet has been seted up to the barrel top surface, the feed inlet top surface is equipped with the butt joint groove, the butt joint groove is fill shape structure, the cartridge has the vibration to pass through the pipe on the butt joint groove, the vibration is equipped with a pair of vibrating motor through tub both sides, the vibration passes through tub bottom cartridge on the butt joint groove top surface, a plurality of jacks have been seted up to the butt joint groove top surface, the vibration is equipped with a plurality of inserted bars through the tub bottom, and is a plurality of the inserted bar runs through a plurality of the through-hole, a plurality of the inserted bar overcoat is equipped with a plurality of vibrating spring, the vibration is equipped with the unloading swash plate.
The storage structure comprises: the device comprises a storage hopper, a discharge hole, a discharge pipe, a fixing ring and a discharge switch;
the storage hopper is installed above the machine barrel, a discharge port of a rectangular structure is formed in the bottom end of the storage hopper, a discharge pipe extends out of the bottom end of the discharge port, the discharge pipe is inserted into the top end of the vibration passing pipe, a fixing ring is sleeved outside the storage hopper, a blanking switch is arranged on the discharge port and above the vibration passing pipe, and the fixing ring is connected with a weighing structure.
The weighing structure comprises: a pair of fixing plates, a pair of supporting grooves, a pair of supporting rods, a pair of supporting springs and a pair of pressure sensors;
the pair of fixing plates are arranged on two sides of the fixing ring, a pair of supporting grooves are formed below the pair of fixing plates respectively, the pair of supporting rods are inserted into the pair of supporting grooves, a pair of supporting springs are connected to the bottom ends of the pair of supporting rods, the pair of pressure sensors are embedded into the bottom ends of the pair of supporting grooves, and the pair of pressure sensors are connected with the bottom ends of the pair of supporting springs.
A pair of parallel rotating rods is arranged in the machine barrel, and a pair of mutually meshed thread extrusion plates is sleeved on the rotating rods.
And a rubber sleeve matched with the bottom end of the vibration passing pipe is arranged on the inner side of the butt joint groove.
The size of the bottom end of the butt joint groove is larger than that of the top end of the butt joint groove.
The blanking inclined plate is obliquely arranged at the bottom end of the vibration passing pipe, and a pair of guard plates is arranged on two sides of the blanking inclined plate.
The vibration passing pipe is a hollow through-core pipe with a rectangular structure.
The top ends of the pair of support rods are in butt joint with the bottom surface of the fixed plate, and the top ends of the pair of support rods are connected with the bottom surface of the fixed plate through a pair of fixing bolts.
One side of the main machine body is provided with a control box.
The plastic granulation equipment for processing the PVC pipes, which is manufactured by the technical scheme of the invention, has the advantages of simple structure and convenient operation, auxiliary material weight can be automatically weighed by matching the storage structure, the vibration blanking structure and the weighing structure, and the auxiliary material is automatically and uniformly scattered into the machine barrel by the vibration blanking structure.
Drawings
FIG. 1 is a schematic structural view of a plastic granulation apparatus for processing PVC pipes according to the present invention.
FIG. 2 is a schematic side view of the plastic granulating apparatus for processing PVC pipes according to the present invention.
FIG. 3 is a schematic top view of the plastic granulating apparatus for processing PVC pipes according to the present invention.
FIG. 4 is a schematic structural diagram of an XX structure of the plastic granulation equipment for processing PVC pipes.
FIG. 5 is a schematic structural diagram of an XX structure of the plastic granulation equipment for processing PVC pipes.
In the figure: 1. a main body; 2. a barrel; 3. a heating jacket; 4. a feed hopper; 5. forming a mold; 6. a feed inlet; 7. a butt joint groove; 8. vibrating through the tube; 9. a vibration motor; 10. inserting a rod; 11. a vibration spring; 12. blanking sloping plates; 13. a storage hopper; 14. a discharge port; 15. a discharge pipe; 16. a fixing ring; 17. a blanking switch; 18. a fixing plate; 19. a support groove; 20. a support bar; 21. a support spring; 22. a pressure sensor; 23. rotating the rod; 24. a screw thread extrusion plate; 25. a rubber sleeve; 26. fixing the bolt; 27. and a control box.
Detailed Description
The present invention is described in detail with reference to the accompanying drawings, as shown in fig. 1-5, the present embodiment is characterized by comprising a main machine body 1, a machine barrel 2, a heating shell 3, a feeding hopper 4 and a forming mold 5, wherein the center of the main machine body 1 is provided with the machine barrel 2, the heating shell 3 is sleeved on the machine barrel 2 and is connected with the main machine body 1, the feeding hopper 4 is installed at one end of the main machine body 1 and is communicated with one end of the machine barrel 2, the forming mold 5 is installed at the end of the machine barrel 2, and an automatic auxiliary material adding mechanism is arranged on the machine barrel 2 and on one side; the automatic auxiliary material adding mechanism consists of a material storage structure, a vibration blanking structure and a weighing structure; vibration unloading structure includes: the device comprises a charging opening 6, a butt joint groove 7, a vibration passing pipe 8, a pair of vibration motors 9, a plurality of inserted rods 10, a plurality of vibration springs 11 and a blanking inclined plate 12; the top surface of the machine barrel 2 is provided with a charging opening 6, the top surface of the charging opening 6 is provided with a butt joint groove 7, the butt joint groove 7 is of a bucket-shaped structure, a vibration passing pipe 8 is inserted in the butt joint groove 7, a pair of vibration motors 9 are arranged on two sides of the vibration passing pipe 8, the bottom end of the vibration passing pipe 8 is inserted in the top surface of the butt joint groove 7, the top surface of the butt joint groove 7 is provided with a plurality of jacks, the bottom end of the vibration passing pipe 8 is provided with a plurality of insertion rods 10, the plurality of insertion rods 10 penetrate through a plurality of through holes, a plurality of vibration springs 11 are sleeved outside the; this plastics granulation equipment is used in PVC tubular product processing, simple structure, convenient operation joins in marriage through storage structure, vibration blanking structure and the structure of weighing and, can be automatic weigh auxiliary material weight to through vibration blanking structure, with the automatic even income barrel that spills of auxiliary material, above-mentioned structure joins in marriage and, the interpolation auxiliary material that can be automatic even can make PVC tubular product add man-hour can add modified material when the granulation, can modify the material of PVC tubular product.
All the electrical components in the present application are connected with the power supply adapted to the electrical components through the wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and specific connection and control sequences should be obtained.
Example (b): according to the attached figures 1-5 of the specification, the plastic granulation equipment for processing the PVC pipe comprises a main machine body 1, a machine barrel 2, a heating shell 3, a feed hopper 4 and a forming die 5, wherein the machine barrel 2 is arranged in the center of the main machine body 1, the heating shell 3 is sleeved on the machine barrel 2 and is connected with the main machine body 1, the feed hopper 4 is arranged at one end of the main machine body 1 and is communicated with one end of the machine barrel 2, the forming die 5 is arranged at the end part of the machine barrel 2, an automatic auxiliary material adding mechanism is arranged on the machine barrel 2 and is positioned at one side of the feed hopper 4, in the specific implementation process, the main machine body 1 is used for fixing the machine barrel 2, the heating shell 3 is sleeved outside the machine barrel 2 and is used for heating the machine barrel 2, a pair of parallel rotating rods 23 is arranged in the machine barrel 2, a pair of mutually meshed thread extrusion plates 24 are, the rotating motor drives the pair of rotating rods 23 to rotate and be meshed with each other, materials are added into the materials through the feed hopper 4, the materials are moved to one side of the heating shell 3 under the meshing action of the pair of threaded extrusion plates 24, the auxiliary material is introduced into the machine barrel 2 through the automatic auxiliary material adding mechanism, and the control box 27 is arranged on one side of the main machine body 1;
the automatic auxiliary material adding mechanism consists of a material storage structure, a vibration blanking structure and a weighing structure;
as can be known from the attached figures 1-5 of the specification, the vibrating blanking structure comprises: the device comprises a charging opening 6, a butt joint groove 7, a vibration passing pipe 8, a pair of vibration motors 9, a plurality of inserted rods 10, a plurality of vibration springs 11 and a blanking inclined plate 12, wherein the connection relation and the position relation are as follows;
the top surface of the machine barrel 2 is provided with a charging opening 6, the top surface of the charging opening 6 is provided with a butt joint groove 7, the butt joint groove 7 is of a bucket-shaped structure, a vibration passing pipe 8 is inserted in the butt joint groove 7, a pair of vibration motors 9 are arranged on two sides of the vibration passing pipe 8, the bottom end of the vibration passing pipe 8 is inserted in the top surface of the butt joint groove 7, the top surface of the butt joint groove 7 is provided with a plurality of jacks, the bottom end of the vibration passing pipe 8 is provided with a plurality of insertion rods 10, the plurality of insertion rods 10 penetrate through a plurality of through holes, a plurality of vibration springs 11 are sleeved outside the;
in the concrete implementation process, butt joint 7 inboard is equipped with the rubber sleeve 25 that matches through pipe 8 bottom with the vibration, the size of butt joint 7 bottom is greater than the size on butt joint 7 top, unloading swash plate 12 slope is installed in the vibration bottom that passes through pipe 8, unloading swash plate 12 both sides are equipped with a pair of backplate, the vibration is through the cavity through-core pipe that pipe 8 is the rectangle structure, butt joint through pipe 8 butt joint through butt joint 7 on the charge door 6 and vibration, and then drive the vibration through pipe 8 vibration through vibrating motor 9, and then make the auxiliary material enter into butt joint 7 from storage structure, a plurality of jacks on the butt joint 7 top surface are used for fixed a plurality of inserted bars 10, and provide the vibration through pipe 8 through vibrating spring 11 and support, and add the material vibration into the material through unloading swash plate 12.
As can be seen from fig. 1 to 5 of the specification, the above-mentioned stock structure comprises: the material storage hopper 13, the discharge port 14, the discharge pipe 15, the fixing ring 16 and the blanking switch 17 are connected and positioned as follows;
the storage hopper 13 is arranged above the machine barrel 2, the bottom end of the storage hopper 13 is provided with a discharge hole 14 with a rectangular structure, the bottom end of the discharge hole 14 extends out of a discharge pipe 15, the discharge pipe 15 is inserted into the top end of the vibration passing pipe 8, a fixing ring 16 is sleeved outside the storage hopper 13, a blanking switch 17 is arranged on the discharge hole 14 and above the vibration passing pipe 8, and the fixing ring 16 is connected with the weighing structure;
in the specific implementation process, the material is stored through the storage hopper 13, the storage hopper 13 is fixed on the main body 1 through the fixing ring 16, the auxiliary material is conveyed at the discharge port 14 below the storage hopper 13, the auxiliary material is communicated with the discharge port 14 through the discharge pipe 15, the falling rate of the auxiliary material is controlled through the discharge switch 17 on the discharge pipe 15, and the auxiliary material is opened and closed through the discharge switch 17.
As can be seen from the accompanying figures 1-5 of the specification, the weighing structure comprises: a pair of fixing plates 18, a pair of supporting grooves 19, a pair of supporting rods 20, a pair of supporting springs 21, and a pair of pressure sensors 22, which are connected and positioned as follows;
the pair of fixing plates 18 are mounted on two sides of the fixing ring 16, a pair of supporting grooves 19 are respectively formed below the pair of fixing plates 18, the pair of supporting rods 20 are inserted into the pair of supporting grooves 19, the bottom ends of the pair of supporting rods 20 are connected with a pair of supporting springs 21, the pair of pressure sensors 22 are embedded at the bottom ends of the pair of supporting grooves 19, and the pair of pressure sensors 22 are connected with the bottom ends of the pair of supporting springs 21;
in the specific implementation process, the top ends of the pair of support rods 20 are butted with the bottom surface of the fixing plate 18, the top ends of the pair of support rods 20 are connected with the bottom surface of the fixing plate 18 through the pair of fixing bolts 26, the pair of support rods 20 are fixed through the pair of support grooves 19, the support rods 20 can move in the support grooves 19 in a telescopic manner, the fixing ring 16 is connected with the storage hopper 13, the fixing ring 16 can be supported through the pair of support rods 20, the material in the storage hopper 13 is matched with the pair of pressure sensors 22 through the pair of support springs 21, so that when the storage hopper 13 generates pressure on the pressure sensors 22, and further when the weight of the material in the storage hopper 13 changes, the pressure sensors 22 can perform pressure sensing.
To sum up, this plastics granulation equipment is used in processing of PVC tubular product, simple structure, convenient operation, join in marriage through storage structure, vibration blanking structure and the structure of weighing, can be automatic weigh auxiliary material weight to through vibration blanking structure, with the automatic even income barrel 2 that spills of auxiliary material in, above-mentioned structure joins in marriage and, can automatic even interpolation auxiliary material, can make PVC tubular product add during processing can add modified material when the granulation, can modify the material of PVC tubular product.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (10)
1. A plastic granulation device for processing PVC pipes comprises a main machine body (1), a machine barrel (2), a heating casing (3), a feed hopper (4) and a forming die (5), wherein the machine barrel (2) is arranged at the center of the main machine body (1), the heating casing (3) is sleeved on the machine barrel (2) and is connected with the main machine body (1), the feed hopper (4) is installed at one end of the main machine body (1) and is communicated with one end of the machine barrel (2), and the forming die (5) is installed at the end part of the machine barrel (2), and is characterized in that an automatic auxiliary material adding mechanism is arranged on one side, located on the feed hopper (4), of the machine barrel (2);
the auxiliary material automatic adding mechanism consists of a material storage structure, a vibration blanking structure and a weighing structure;
the vibration blanking structure comprises: the device comprises a feed inlet (6), a butt joint groove (7), a vibration passing pipe (8), a pair of vibration motors (9), a plurality of inserted rods (10), a plurality of vibration springs (11) and a blanking inclined plate (12);
feed inlet (6) have been seted up to barrel (2) top surface, feed inlet (6) top surface is equipped with butt joint groove (7), butt joint groove (7) are the fill shape structure, the cartridge has the vibration to pass through pipe (8) on butt joint groove (7), the vibration is equipped with a pair of vibrating motor (9) through pipe (8) both sides, the vibration passes through pipe (8) bottom cartridge on butt joint groove (7) top surface, a plurality of jacks have been seted up to butt joint groove (7) top surface, the vibration is equipped with a plurality of inserted bars (10) through pipe (8) bottom, and is a plurality of inserted bar (10) run through a plurality of the through-hole, a plurality of inserted bar (10) overcoat is equipped with a plurality of vibrating spring (11), the vibration is equipped with unloading swash plate (12) through pipe (8) bottom one side.
2. The plastic granulation equipment for processing PVC pipes as claimed in claim 1, wherein the storage structure comprises: a storage hopper (13), a discharge hole (14), a discharge pipe (15), a fixing ring (16) and a blanking switch (17);
storage hopper (13) are installed in barrel (2) top, discharge gate (14) of rectangle structure are seted up to storage hopper (13) bottom, discharge pipe (15) extend out to discharge gate (14) bottom, discharge pipe (15) cartridge is in the top of vibration through pipe (8), storage hopper (13) overcoat is equipped with solid fixed ring (16), just be located the vibration on discharge gate (14) and be equipped with unloading switch (17) through pipe (8) top, gu fixed ring (16) and the structural connection that weighs.
3. The plastic granulation equipment for processing the PVC pipe as claimed in claim 1, wherein the weighing structure comprises: a pair of fixing plates (18), a pair of supporting grooves (19), a pair of supporting rods (20), a pair of supporting springs (21) and a pair of pressure sensors (22);
the pair of fixing plates (18) are mounted on two sides of the fixing ring (16), a pair of supporting grooves (19) are formed in the lower portions of the pair of fixing plates (18), the pair of supporting rods (20) are inserted into the pair of supporting grooves (19), a pair of supporting springs (21) are connected to the bottom ends of the pair of supporting rods (20), the pair of pressure sensors (22) are embedded in the bottom ends of the pair of supporting grooves (19), and the pair of pressure sensors (22) are connected with the bottom ends of the pair of supporting springs (21).
4. The plastic granulation equipment for processing PVC pipes as claimed in claim 1, wherein a pair of parallel rotating rods (23) is arranged in the machine barrel (2), and a pair of mutually meshed threaded extrusion plates (24) are sleeved on the pair of rotating rods (23).
5. The plastic granulation equipment for processing PVC pipes as claimed in claim 1, wherein the inside of the butt-joint groove (7) is provided with a rubber sleeve (25) matched with the bottom end of the vibration passing pipe (8).
6. The plastic granulation equipment for processing the PVC pipe as claimed in claim 5, wherein the size of the bottom end of the butt joint groove (7) is larger than that of the top end of the butt joint groove (7).
7. The plastic granulation equipment for processing the PVC pipe as claimed in claim 1, wherein the blanking inclined plate (12) is obliquely arranged at the bottom end of the vibration passing pipe (8), and a pair of guard plates are arranged at two sides of the blanking inclined plate (12).
8. The plastic granulation equipment for processing PVC pipes as claimed in claim 1, wherein the vibration passing pipe (8) is a hollow tube with a rectangular structure.
9. The plastic granulating equipment for processing PVC pipes as claimed in claim 2 or 3, wherein the top ends of a pair of the supporting rods (20) are butted with the bottom surface of the fixed plate (18), and the top ends of a pair of the supporting rods (20) are connected with the bottom surface of the fixed plate (18) through a pair of fixed bolts (26).
10. The plastic granulation equipment for processing the PVC pipe as claimed in claim 1, wherein a control box (27) is arranged on one side of the main machine body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061260.XA CN112454722A (en) | 2021-01-18 | 2021-01-18 | Plastic granulation equipment for PVC pipe machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061260.XA CN112454722A (en) | 2021-01-18 | 2021-01-18 | Plastic granulation equipment for PVC pipe machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112454722A true CN112454722A (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110061260.XA Pending CN112454722A (en) | 2021-01-18 | 2021-01-18 | Plastic granulation equipment for PVC pipe machining |
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| Country | Link |
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| CN (1) | CN112454722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115574904A (en) * | 2022-12-06 | 2023-01-06 | 常州吉斯佰恩新材料科技有限公司 | Plastic particle metering and weighing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589610A (en) * | 2015-01-21 | 2015-05-06 | 卢丽 | Feeding device of plastic extruder |
| CN206598514U (en) * | 2017-03-16 | 2017-10-31 | 东莞市胶帅高分子材料有限公司 | A kind of extruder of high temperature resistant PETGF materials |
| CN111100419A (en) * | 2019-12-25 | 2020-05-05 | 重庆科聚孚工程塑料有限责任公司 | High-gloss, low-odor and weather-resistant ABS material and preparation method and device thereof |
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2021
- 2021-01-18 CN CN202110061260.XA patent/CN112454722A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589610A (en) * | 2015-01-21 | 2015-05-06 | 卢丽 | Feeding device of plastic extruder |
| CN206598514U (en) * | 2017-03-16 | 2017-10-31 | 东莞市胶帅高分子材料有限公司 | A kind of extruder of high temperature resistant PETGF materials |
| CN111100419A (en) * | 2019-12-25 | 2020-05-05 | 重庆科聚孚工程塑料有限责任公司 | High-gloss, low-odor and weather-resistant ABS material and preparation method and device thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115574904A (en) * | 2022-12-06 | 2023-01-06 | 常州吉斯佰恩新材料科技有限公司 | Plastic particle metering and weighing device |
| CN115574904B (en) * | 2022-12-06 | 2023-12-12 | 常州吉斯佰恩新材料科技有限公司 | Plastic particle metering and weighing device |
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Application publication date: 20210309 |