CN219855561U - Seal head die convenient to disassemble and assemble - Google Patents
Seal head die convenient to disassemble and assemble Download PDFInfo
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- CN219855561U CN219855561U CN202321063050.5U CN202321063050U CN219855561U CN 219855561 U CN219855561 U CN 219855561U CN 202321063050 U CN202321063050 U CN 202321063050U CN 219855561 U CN219855561 U CN 219855561U
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- seal head
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- 238000003780 insertion Methods 0.000 claims abstract description 19
- 230000037431 insertion Effects 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000007789 sealing Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Moulds, Cores, Or Mandrels (AREA)
Abstract
The utility model belongs to the technical field of disassembly and assembly of seal head molds, in particular to a seal head mold convenient to disassemble and assemble, which comprises a seal head mold body lower mold and a seal head mold body upper mold; the lower end socket die body die is in sliding fit with the upper end socket die body die; the bottom of the upper die of the seal head die body is fixedly connected with a first fixing column; a first fixing hole is formed in the middle of the first fixing column; a first fixed column jack is formed in the middle of the lower die of the seal head die body; a second fixing hole is formed between the first fixing column insertion hole and the lower die of the seal head die body; a fixing bolt is arranged outside the second fixing hole; the fixing bolt is in sliding fit with the second fixing hole and the first fixing hole. Through being equipped with the gim peg between last mould and lower mould and making stability promotion between last mould and the lower mould, the problem that appears shifting between reduction last mould and the lower mould, and then promote the yields of product, improvement production efficiency.
Description
Technical Field
The utility model relates to the technical field of seal head mold unsealing, in particular to a seal head mold convenient to disassemble and assemble.
Background
The seal head mould is a special production device for producing seal heads and can be divided into a flat bottom seal head, a closing-in seal head, a cap seal head with edges, a hemispherical seal head and the like.
In the prior art, the seal head mold unsealing device is generally composed of an upper mold and a lower mold of the seal head mold, or is a simple integral mold used for producing a sealed seal head device.
In the existing seal head die, after the upper die and the lower die are clamped, the produced product is molded in the die, so that a corresponding product can be produced, and in use observation, the situation that the upper die and the lower die are easily shifted after the upper die and the lower die are clamped is found, so that the produced product has the defect.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: the utility model relates to a seal head die convenient to disassemble and assemble, which comprises a seal head die body lower die and a seal head die body upper die; the lower end socket die body die is in sliding fit with the upper end socket die body die; the bottom of the upper die of the seal head die body is fixedly connected with a first fixing column; a first fixing hole is formed in the middle of the first fixing column; a first fixed column jack is formed in the middle of the lower die of the seal head die body; a second fixing hole is formed between the first fixing column insertion hole and the lower die of the seal head die body; a fixing bolt is arranged outside the second fixing hole; the fixing bolt is in sliding fit with the second fixing hole and the first fixing hole.
Preferably, the bottom of the first fixing column is fixedly connected with a second fixing column; a plurality of first elastic protruding rods are fixedly connected to the surface of the second fixing column; a second fixed column jack is formed in the middle of the lower die of the seal head die body; the second fixing column insertion holes correspond to the positions of the second fixing columns; the inner side wall of the second fixing column jack is fixedly connected with a plurality of second elastic protruding rods.
Preferably, the fixing bolt is rotatably connected with a rotating shaft; the middle part of the rotating shaft is provided with a movable wing; a torsion spring is arranged between the rotating shaft and the movable wing; the middle part of the movable wing is fixedly connected with a first elastic rope; the movable rod is connected inside the fixed bolt in a sliding way; the middle part of the movable rod is sleeved with a spring; a baffle is fixedly connected to the middle part of the movable rod; one end of the first elastic rope is fixedly connected with the movable wing, and the other end of the first elastic rope is fixedly connected with the middle part of the movable rod.
Preferably, a second elastic rope is connected between the tops of the plurality of first elastic protruding rods.
Preferably, elastic balls are fixedly connected to the plurality of first elastic protruding rods; the elastic ball is arranged at the end part of the first elastic bulge rod.
Preferably, the inner side wall of the second fixing hole is provided with a plurality of flexible belts; the flexible belt is fixedly connected with the second fixing hole.
The utility model has the advantages that:
1. according to the seal head die convenient to disassemble and assemble, the stability between the upper die and the lower die is improved by arranging the fixing bolts between the upper die and the lower die, so that the problem of displacement between the upper die and the lower die is reduced, the yield of products is further improved, and the production efficiency is improved.
2. According to the seal head die convenient to disassemble and assemble, the magnet is arranged, when the upper end of the seal head body and the lower end of the seal head body are assembled, the upper end of the seal head body with the magnet and the lower end of the seal head body can attract each other under the action of magnetic force, so that the assembly of the lower end of the seal head body and the upper end of the seal head body is still firm under the condition that other external force is not added, the shaking and shifting of the assembled die due to the action of the external force during production are reduced, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the upper and lower end structures of a seal head body of the present utility model;
FIG. 2 is a schematic diagram of the side structure of the upper and lower ends of the seal head body of the present utility model;
FIG. 3 is a schematic diagram of the mating structure of the first and second fixing post receptacles and the flexible strap of the present utility model;
FIG. 4 is a schematic view of the structure of the first and second fastening members of the present utility model;
FIG. 5 is a schematic cross-sectional view of a latch bolt according to the present utility model;
FIG. 6 is a schematic diagram of a magnetic attraction structure of the present utility model;
in the figure: 1. a lower die of the seal head die body; 11. the head die body is provided with an upper die; 12. a first fixing column; 13. a first fixing hole; 14. a first fixed column jack; 15. a second fixing hole; 16. a fixing bolt; 2. a second fixing column; 21. a first elastic protrusion lever; 22. a second fixed column jack; 23. a second elastic protrusion rod; 3. a rotating shaft; 31. a movable wing; 32. a first elastic cord; 33. a movable rod; 34. a baffle; 35. a spring; 4. a second elastic cord; 5. an elastic ball; 6. a flexible belt; 7. and (3) a magnet.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1 to 5, an embodiment of the present utility model is an end socket mold convenient for disassembly and assembly, which is characterized in that: the sealing head die comprises a sealing head die body lower die 1 and a sealing head die body upper die 11; the lower end socket die body die 1 is in sliding fit with the upper end socket die body die 11; the bottom of the upper die 11 of the seal head die body is fixedly connected with a first fixing column 12; a first fixing hole 13 is formed in the middle of the first fixing column 12; the middle part of the lower die 1 of the seal head die body is provided with a first fixed column jack 14; a second fixing hole 15 is formed between the first fixing column insertion hole 14 and the lower die 1 of the seal head die body; a fixing bolt 16 is arranged outside the second fixing hole 15; the fixed bolt 16 is in sliding fit with the second fixed hole 15 and the first fixed hole 13; when in work, a product to be produced is placed between the lower end socket die body die 1 and the upper end socket die body die 11; the operator aligns the lower end socket die body die 1 with the upper end socket die body die 11 up and down, inserts the first fixing column 12 into the first fixing column insertion hole 14 for fixing, and at this time, inserts the fixing bolt 16 through the second fixing hole 15 and then penetrates the first fixing hole 13 for fixing the die. The step is that when the head die works, the positions of the lower die 1 of the head die body and the upper die 11 of the head die body are aligned by utilizing the cuttage of the first fixing columns 12 and the first fixing column insertion holes 14, so that the working state of the die is better, and meanwhile, after the fixing bolts 16 are inserted into the second fixing holes 15 to penetrate through the first fixing holes 13, the assembly of the lower die 1 of the head die body and the upper die 11 of the head die body is stable and does not shake, so that the problem that the production efficiency is influenced by shaking when an operator uses the lower die 1 of the head die body and the upper die 11 of the head die body to work is solved.
The bottom of the first fixed column 12 is fixedly connected with a second fixed column 2; a plurality of first elastic protruding rods 21 are fixedly connected to the surface of the second fixing column 2; the middle part of the lower die 1 of the seal head die body is provided with a second fixed column jack 22; the second fixing column insertion holes 22 correspond to the positions of the second fixing columns 2; the inner side wall of the second fixing column jack 22 is fixedly connected with a plurality of second elastic protruding rods 23; when the head die body lower die 1 and the head die body upper die 11 are assembled and fixed in operation, the second fixed column 2 at the top end of the first fixed column 12 is inserted into the second fixed column jack 22, at this time, the plurality of first elastic protruding rods 21 on the surface of the second fixed column 2 rub against the plurality of second elastic protruding rods 23 on the inner wall of the second fixed column jack 22, so that the friction force of a contact surface can be increased, and the second fixed column 2 and the second fixed column jack 22 are combined more tightly to reduce shaking; because the first elastic protruding rod 21 and the second elastic protruding rod 23 rub and vibrate and can shake off the inner wall dust to the first elastic protruding rod 21 and the second elastic protruding rod 23 are mixed mutually and are mixed, make the contact more inseparable, reduce the ash layer and block up, reduce the rocking that the gap leads to, reinforcing head mould body lower mould 1 and head mould body upper mould 11's zonulae occludens.
The fixed bolt 16 is rotatably connected with a rotating shaft 3; the middle part of the rotating shaft 3 is provided with a movable wing 31; a torsion spring is arranged between the rotating shaft 3 and the movable wing 31; the middle part of the movable wing 31 is fixedly connected with a first elastic rope 32; a movable rod 33 is connected inside the fixed bolt 16 in a sliding way; a spring 35 is sleeved in the middle of the movable rod 33; a baffle 34 is fixedly connected to the middle part of the movable rod 33; one end of the first elastic rope 32 is fixedly connected with the movable wing 31, and the other end of the first elastic rope is fixedly connected with the middle part of the movable rod 33; during operation, the fixing bolt 16 can be inserted into the second fixing hole 15 for reinforcement, in the inserting process, the edge of the second fixing hole 15 extrudes the movable wing 31 to drive the rotating shaft 3 to rotate, at the moment, the movable wing 31 is folded inside the fixing bolt 16, after the fixing bolt 16 enters the second fixing hole 15, the movable wing 31 rebounds to the original position under the action of the torsion spring, and the movable wing 31 clamps the fixing bolt 16, so that the fixing bolt 16 cannot fall off by itself. In this step, the telescopic working principle of the movable wing 31 in the middle of the fixing bolt 16 is utilized to fix the first fixing column 12 and the first fixing column jack 14, so that the influence of external force on the lower die 1 of the seal head die body and the upper die 11 of the seal head die body when the seal head is produced by extrusion is reduced, the first fixing column 12 and the first fixing column jack 14 are embedded and fall off, and the stability of the die in the production process is optimized.
A second elastic rope 4 is connected between the tops of the plurality of first elastic protruding rods 21. During operation, a plurality of second elastic ropes 4 on the surface of the first elastic protruding rod 21 can be utilized, the second elastic ropes 4 can restrict the first elastic protruding rod 21 and increase the contact surface, when the second fixing column 2 is inserted into the second fixing column insertion hole 22, the first elastic protruding rod 21 and the second elastic ropes 4 rub with the second elastic protruding rod 23, so that the lower end socket die body 1 and the upper end socket die body 11 are firmly assembled. This step is beneficial to the loss of the first resilient projection bar 21 in daily repetitive production, increasing the life of the parts to extend the life of the machine and reduce production costs.
Elastic balls 5 are fixedly connected to the plurality of first elastic protruding rods 21; the elastic ball 5 is provided at the end of the first elastic protrusion rod 21. When the fixing device works, the elastic balls 5 at the top ends of the first elastic protruding rods 21 are utilized, so that when the second fixing column 2 is inserted into the second fixing column insertion hole 22, the elastic balls 5 are clamped at the lowest ends in contact with the second elastic protruding rods 23, and fixing is completed. The elastic ball 5 in this step has a larger volume than the first elastic protruding rod 21, and after the overall volume is increased, the contact surface becomes larger, so that the first elastic protruding rod 21 and the elastic ball 5 in the next row can be clamped and fixed in the second fixing column insertion hole 22, and the tight connection between the second fixing column 2 and the second fixing column insertion hole 22 is enhanced.
The inner side wall of the second fixing hole 15 is provided with a plurality of flexible belts 6; the flexible belt 6 is fixedly connected with the second fixing hole 15; in operation, the flexible belt 6 is penetrated when the fixing bolt 16 is inserted into the second fixing hole 15, the densely and soft flexible belt 6 can be fully contacted with the second fixing hole 15, the step is beneficial to position determination and integral fixation when the fixing bolt 16 is inserted and taken out, and meanwhile, due to the soft characteristic of the flexible belt 6, buffering can be carried out when the fixing bolt 16 is inserted, and the tip abrasion of the fixing bolt 16 is reduced.
Example two
As shown in fig. 5, in comparative example one, another embodiment of the present utility model is: the sealing head die is characterized in that a plurality of magnets 7 are fixedly connected to the middle of the upper die 11 of the sealing head die body, and a plurality of magnets 7 are fixedly connected to the middle of the lower die 1 of the sealing head die body. During operation, when the upper end socket die body 11 and the lower end socket die body die 1 are assembled, the upper end socket die body 11 provided with the magnet 7 and the lower end socket die body die 1 can attract each other under the action of magnetic force, so that the assembly of the lower end socket die body die 1 and the upper end socket die body die 11 is still firm under the condition that other external force is not added, the shaking and shifting of the assembled die due to the action of the external force during production are reduced, and the production efficiency is improved. When the head die body lower die 1 and the head die body upper die 11 are assembled and fixed in operation, the second fixed column 2 at the top end of the first fixed column 12 is inserted into the second fixed column jack 22, at this time, the plurality of first elastic protruding rods 21 on the surface of the second fixed column 2 rub against the plurality of second elastic protruding rods 23 on the inner wall of the second fixed column jack 22, so that the friction force of a contact surface can be increased, and the second fixed column 2 and the second fixed column jack 22 are combined more tightly to reduce shaking; because the first elastic protruding rod 21 and the second elastic protruding rod 23 rub and vibrate and can shake off the inner wall dust to the first elastic protruding rod 21 and the second elastic protruding rod 23 are mixed mutually and are mixed, make the contact more inseparable, reduce the ash layer and block up, reduce the rocking that the gap leads to, reinforcing head mould body lower mould 1 and head mould body upper mould 11's zonulae occludens.
The working principle is that when in operation, a product to be produced is placed between the lower end socket die body die 1 and the upper end socket die body die 11; the operator aligns the lower end socket die body die 1 with the upper end socket die body die 11 up and down, inserts the first fixing column 12 into the first fixing column insertion hole 14 for fixing, and at this time, inserts the fixing bolt 16 through the second fixing hole 15 and then penetrates the first fixing hole 13 for fixing the die. The step is that when the head die works, the positions of the lower die 1 of the head die body and the upper die 11 of the head die body are aligned by utilizing the cuttage of the first fixing columns 12 and the first fixing column insertion holes 14, so that the working state of the die is better, and meanwhile, after the fixing bolts 16 are inserted into the second fixing holes 15 to penetrate through the first fixing holes 13, the assembly of the lower die 1 of the head die body and the upper die 11 of the head die body is stable and does not shake, so that the problem that the production efficiency is influenced by shaking when an operator uses the lower die 1 of the head die body and the upper die 11 of the head die body to work is solved. When the head die body lower die 1 and the head die body upper die 11 are assembled and fixed in operation, the second fixed column 2 at the top end of the first fixed column 12 is inserted into the second fixed column jack 22, at this time, the plurality of first elastic protruding rods 21 on the surface of the second fixed column 2 rub against the plurality of second elastic protruding rods 23 on the inner wall of the second fixed column jack 22, so that the friction force of a contact surface can be increased, and the second fixed column 2 and the second fixed column jack 22 are combined more tightly to reduce shaking; because the first elastic protruding rod 21 and the second elastic protruding rod 23 rub and vibrate and can shake off the inner wall dust to the first elastic protruding rod 21 and the second elastic protruding rod 23 are mixed mutually and are mixed, make the contact more inseparable, reduce the ash layer and block up, reduce the rocking that the gap leads to, reinforcing head mould body lower mould 1 and head mould body upper mould 11's zonulae occludens. During operation, the fixing bolt 16 can be inserted into the second fixing hole 15 for reinforcement, in the inserting process, the edge of the second fixing hole 15 extrudes the movable wing 31 to drive the rotating shaft 3 to rotate, at the moment, the movable wing 31 is folded inside the fixing bolt 16, after the fixing bolt 16 enters the second fixing hole 15, the movable wing 31 rebounds to the original position under the action of the torsion spring, and the movable wing 31 clamps the fixing bolt 16, so that the fixing bolt 16 cannot fall off by itself. In this step, the telescopic working principle of the movable wing 31 in the middle of the fixing bolt 16 is utilized to fix the first fixing column 12 and the first fixing column jack 14, so that the influence of external force on the lower die 1 of the seal head die body and the upper die 11 of the seal head die body when the seal head is produced by extrusion is reduced, the first fixing column 12 and the first fixing column jack 14 are embedded and fall off, and the stability of the die in the production process is optimized. During operation, a plurality of second elastic ropes 4 on the surface of the first elastic protruding rod 21 can be utilized, the second elastic ropes 4 can restrict the first elastic protruding rod 21 and increase the contact surface, when the second fixing column 2 is inserted into the second fixing column insertion hole 22, the first elastic protruding rod 21 and the second elastic ropes 4 rub with the second elastic protruding rod 23, so that the lower end socket die body 1 and the upper end socket die body 11 are firmly assembled. This step is beneficial to the loss of the first resilient projection bar 21 in daily repetitive production, increasing the life of the parts to extend the life of the machine and reduce production costs. When the fixing device works, the elastic balls 5 at the top ends of the first elastic protruding rods 21 are utilized, so that when the second fixing column 2 is inserted into the second fixing column insertion hole 22, the elastic balls 5 are clamped at the lowest ends in contact with the second elastic protruding rods 23, and fixing is completed. The elastic ball 5 in this step has a larger volume than the first elastic protruding rod 21, and after the overall volume is increased, the contact surface becomes larger, so that the first elastic protruding rod 21 and the elastic ball 5 in the next row can be clamped and fixed in the second fixing column insertion hole 22, and the tight connection between the second fixing column 2 and the second fixing column insertion hole 22 is enhanced. In operation, the flexible belt 6 is penetrated when the fixing bolt 16 is inserted into the second fixing hole 15, the densely and soft flexible belt 6 can be fully contacted with the second fixing hole 15, the step is beneficial to position determination and integral fixation when the fixing bolt 16 is inserted and taken out, and meanwhile, due to the soft characteristic of the flexible belt 6, buffering can be carried out when the fixing bolt 16 is inserted, and the tip abrasion of the fixing bolt 16 is reduced.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (6)
1. Head mould convenient to dismouting, its characterized in that: comprises a seal head die body lower die (1) and a seal head die body upper die (11); the seal head die body lower die (1) is in sliding fit with the seal head die body upper die (11); the bottom of the upper die (11) of the seal head die body is fixedly connected with a first fixing column (12); a first fixing hole (13) is formed in the middle of the first fixing column (12); a first fixed column jack (14) is formed in the middle of the lower die (1) of the seal head die body; a second fixing hole (15) is formed between the first fixing column insertion hole (14) and the lower die (1) of the seal head die body; a fixing bolt (16) is arranged outside the second fixing hole (15); the fixing bolt (16) is in sliding fit with the second fixing hole (15) and the first fixing hole (13).
2. The end socket die convenient to disassemble and assemble as claimed in claim 1, wherein: the bottom of the first fixed column (12) is fixedly connected with a second fixed column (2); a plurality of first elastic protruding rods (21) are fixedly connected to the surface of the second fixing column (2); a second fixed column jack (22) is formed in the middle of the lower die (1) of the seal head die body; the second fixed column insertion holes (22) correspond to the positions of the second fixed columns (2); the inner side wall of the second fixing column jack (22) is fixedly connected with a plurality of second elastic protruding rods (23).
3. The end socket die convenient to disassemble and assemble as claimed in claim 2, wherein: the fixed bolt (16) is rotationally connected with a rotating shaft (3); a movable wing (31) is arranged in the middle of the rotating shaft (3); a torsion spring is arranged between the rotating shaft (3) and the movable wing (31); the middle part of the movable wing (31) is fixedly connected with a first elastic rope (32); the inside of the fixed bolt (16) is connected with a movable rod (33) in a sliding way; a spring (35) is sleeved at the middle part of the movable rod (33); a baffle (34) is fixedly connected to the middle part of the movable rod (33); one end of the first elastic rope (32) is fixedly connected with the movable wing (31), and the other end of the first elastic rope is fixedly connected with the middle part of the movable rod (33).
4. A head mold convenient to disassemble and assemble according to claim 3, wherein: and second elastic ropes (4) are connected between the tops of the plurality of first elastic protruding rods (21).
5. The end socket die convenient to disassemble and assemble as claimed in claim 4, wherein: elastic balls (5) are fixedly connected to the plurality of first elastic bulge rods (21); the elastic ball (5) is arranged at the end part of the first elastic bulge rod (21).
6. The end socket die convenient to disassemble and assemble as claimed in claim 5, wherein: the inner side wall of the second fixing hole (15) is provided with a plurality of flexible belts (6); the flexible belt (6) is fixedly connected with the second fixing hole (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321063050.5U CN219855561U (en) | 2023-05-05 | 2023-05-05 | Seal head die convenient to disassemble and assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321063050.5U CN219855561U (en) | 2023-05-05 | 2023-05-05 | Seal head die convenient to disassemble and assemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219855561U true CN219855561U (en) | 2023-10-20 |
Family
ID=88372034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321063050.5U Active CN219855561U (en) | 2023-05-05 | 2023-05-05 | Seal head die convenient to disassemble and assemble |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219855561U (en) |
-
2023
- 2023-05-05 CN CN202321063050.5U patent/CN219855561U/en active Active
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