CN215969712U - Batch forming rubber seal ring forming equipment - Google Patents
Batch forming rubber seal ring forming equipment Download PDFInfo
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- CN215969712U CN215969712U CN202121644243.0U CN202121644243U CN215969712U CN 215969712 U CN215969712 U CN 215969712U CN 202121644243 U CN202121644243 U CN 202121644243U CN 215969712 U CN215969712 U CN 215969712U
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Abstract
The utility model discloses batch-forming rubber sealing ring forming equipment, which belongs to the field of sealing ring manufacturing and comprises a base, a forming part, a grabbing part, a feeding device and a cutting device, wherein: the base is provided with the forming part, the forming part is used for thermoplastic forming of the rubber sealing ring, the feeding device is used for conveying the rubber strips, the grabbing part is arranged on the base and used for grabbing the rubber strips, the cutting device is used for cutting off the rubber strips, and the cutting device and the grabbing part work periodically.
Description
Technical Field
The utility model relates to the field of sealing ring manufacturing, in particular to rubber sealing ring forming equipment for batch forming.
Background
The rubber sealing ring is an annular cover consisting of one or more parts, so that lubricating oil is prevented from leaking and foreign matters are prevented from invading, and the commonly used rubber sealing ring forming process adopts compression molding or injection molding;
compression molding: the silica gel sealing ring with complex shape such as leather cup and sealing ring is manufactured by a mould pressing method, and the rubber material is placed in a mould for heating and forming by means of a formed female mould and a formed male mould.
Injection molding and injection molding: the silica gel sealing ring is used for complex silica gel sealing rings, such as tire treads, rubber tubes and metal wire surface coating rubber and is manufactured by an injection molding method.
Compression molding is often adopted in rubber seal circle batch production, adopt a plurality of rubber circle molding cavities to carry out batch production in the forming die, need place appropriate amount rubber between last mould and lower mould this moment, but often adopt artifical unloading among the prior art, the manpower adopts and measures or directly cuts the rubber strip down, lead to the unloading inaccurate, sealing washer shaping is incomplete when the unloading is not enough, produce a large amount of wastrel, the adhesion between the sealing washer is too thick when the unloading is excessive, it is difficult to take out the sealing washer, adopt to measure back unloading people and waste time and energy, influence production efficiency, also easy unloading material quantity is unstable, the product quality is undulant great, rubber strip unloading when being convenient for batch production, the rubber seal circle former of batch production is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model provides batch forming rubber sealing ring forming equipment, which can solve the problem that batch forming equipment in the prior art is inconvenient to discharge.
Fashioned rubber seal former in batches includes base, shaping part, snatchs part, material feeding unit and cutting device, wherein:
be equipped with the shaping part on the base, the shaping part is used for rubber seal's thermoplastic molding, material feeding unit is used for carrying the rubber strip, the setting of snatching the part is in on the base, the snatching part is used for snatching the rubber strip, cutting device is used for cutting off the rubber strip, cutting device with the periodic work of snatching the part.
Furthermore, the upper end of the base is fixedly connected with two side plates, and the upper ends of the side plates are fixedly connected with a first top plate;
the forming part comprises a first push rod, an upper forming die, a second push rod and a lower forming die, the first push rod is fixedly connected to the first top plate, the output end of the first push rod is fixedly connected with the upper forming die, the upper forming die is provided with a heating device, the upper end of the base is slidably connected with the lower forming die, the output end of the second push rod is fixedly connected to the lower forming die, the second push rod is fixedly connected to the base, and the lower forming die at least comprises a first working state and a second working state:
when the lower forming die is in a first working state, the lower forming die is positioned below the grabbing part, and the first push rod is positioned at the upper limit of the stroke;
when the lower forming die is in the second working state, the lower forming die is located below the upper forming die, and the first push rod is located at the lower limit of the stroke.
Further, the base upper end fixedly connected with backup pad, the backup pad corresponds material feeding direction setting of material feeding unit, first spout has been seted up to the backup pad, first spout slidable ground is connected with first slider, first spout rotationally is connected with first threaded rod, first threaded rod threaded connection to first slider, the one end of first threaded rod runs through to the outside of backup pad, base fixedly connected with first motor, first motor transmission is connected to first threaded rod, first slider fixedly connected with bracing piece, set up on the bracing piece the part of snatching.
Further, the curb plate is provided with the second roof, the grasping element includes fixed plate, second slider, friction pulley, commentaries on classics cover, fixed cover, first splint and second splint, fixed connection to the bracing piece, bracing piece fixedly connected with the fixed plate, be provided with the friction pulley on the fixed plate, the bracing piece rotationally is connected with changes the cover, fixed cover has been established to fixed connection on the bracing piece, fixed cover fixedly connected with first splint, change and sheathe fixedly connected with second splint, first splint and second splint cooperation setting, the friction pulley with change set frictional connection, the second roof is located the top of friction pulley, second roof fixedly connected with friction strip, the friction strip with friction pulley frictional connection.
Furthermore, a second sliding groove is formed in the side plate, the second sliding groove is slidably connected with a second sliding block, the second top plate is fixedly connected to the second sliding block, the second sliding groove is rotatably connected with a second threaded rod, the second threaded rod is in threaded connection with the second sliding block, and one end of the second threaded rod penetrates through the outer side of the side plate and is fixedly connected with an adjusting rod;
the fixed plate is provided with a third sliding groove, the third sliding groove is slidably connected with a third sliding block, the third sliding block is rotatably connected with the friction wheel, the third sliding groove is fixedly connected with one end of a third spring, and the other end of the third spring is fixedly connected to the third sliding block.
Furthermore, the cutting device comprises a limiting block, a first connecting rod, a second connecting rod, a wedge block, a guide plate and a guide block, the limiting block is connected in the first sliding groove in a sliding mode, the limiting block is located on one side, away from the feeding device, of the first sliding block, the limiting block is fixedly connected with the first connecting rod, one end, away from the limiting block, of the first connecting rod is fixedly connected with the second connecting rod, and the second connecting rod is fixedly connected with the wedge block;
base upper end fixedly connected with the deflector, the guide way has been seted up along vertical direction to the deflector, guide way slidable ground is connected with two the guide block, extension spring's both ends respectively fixed connection to two the guide block, one side fixedly connected with wedge of guide block, the wedge corresponds the wedge setting, the second wedge has been seted up to the wedge, the second wedge sets up with the cooperation of first wedge, two the equal fixedly connected with in one side that the guide block is relative the cutter.
Further, a guide roller groove is formed in each of the first rotating roller and the second rotating roller and used for guiding the rubber strips.
Further, the first threaded rod is a reciprocating screw rod.
Furthermore, the first push rod and the second push rod are electric push rods, pneumatic cylinder push rods or hydraulic cylinder push rods.
Furthermore, a storage cavity is formed in the base, one side of the base is communicated with the outside, and a cabinet door is arranged in the storage cavity.
Has the advantages that:
1. the periodically working grabbing part grabs the rubber strips from the feeding device, and the periodically working cutting device cuts off the rubber strips to coordinate the working period, so that the blanking amount of the rubber strips is stable, the blanking time is saved, the labor intensity of manpower is reduced, and the forming effect is ensured;
2. when the first motor rotates to drive the first sliding block to move to drive the grabbing component to be close to the feeding device, the friction strip drives the friction wheel to rotate, the friction wheel drives the rotating sleeve to rotate reversely, so that the second clamping plate is separated from the first clamping plate, the grabbing of the rubber strip is prepared, and when the rotating sleeve rotates to limit, the friction wheel is converted from rolling friction into sliding friction; when the first sliding block moves to drive the grabbing part to be far away from the feeding device, the friction wheel drives the rotating sleeve to rotate in the forward direction, so that the second clamping plate is close to the first clamping plate, and the rubber strip is grabbed and clamped; when the first sliding block is located far away from the upper limit of the stroke of the feeding device, the friction wheel leaves the friction strip, the second clamping plate leaves the first clamping plate under the action of gravity, the clamping and the discharging are realized, and the blanking can be stabilized by matching with the cutting device.
3. When first slider was located and keeps away from material feeding unit stroke upper limit, first slider promoted the stopper and drives the wedge and remove, and the wedge breaks away from the wedge, under extension spring's effect, drives the guide block and is close to each other to drive the cutter and be close to each other, realize cutting off, the cooperation is grabbed the part and is realized periodic unloading, makes the unloading more stable.
Drawings
Fig. 1 is a schematic axial-side structural view of a batch-forming rubber seal ring forming apparatus provided in the present invention;
FIG. 2 is a schematic view of FIG. 1 with the second top plate removed;
FIG. 3 is an enlarged view of a portion of the structure at A in FIG. 2;
FIG. 4 is an enlarged view of a portion of the structure at B in FIG. 2;
FIG. 5 is an enlarged view of a portion of the structure at C in FIG. 2;
fig. 6 is a schematic structural view of the cutting device in fig. 2.
Description of reference numerals:
1-base, 11-cabinet door, 12-side plate, 13-first top plate, 14-second top plate, 141-friction strip, 15-adjusting rod, 151-first threaded rod, 152-first matching block, 16-first sliding block, 17-supporting rod, 18-supporting plate, 19-first threaded rod, 2-first push rod, 3-first motor, 4-upper forming die, 5-lower forming die, 6-second push rod, 7-grabbing component, 71-fixing plate, 72-third sliding block, 73-friction wheel, 74-rotating sleeve, 75-fixing sleeve, 76-first clamping plate, 77-second clamping plate, 8-feeding device, 81-first rotating roller, 82-second rotating roller, 83-guiding groove, 9-cutting device, 91-limiting block, 92-first connecting rod, 93-second connecting rod, 94-wedge block, 941-first wedge surface, 95-guide plate, 951-guide groove, 96-guide block, 961-wedge plate, 97-cutter and 98-extension spring.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
The specific embodiment is as follows:
as shown in fig. 1 to 6, the apparatus for forming rubber seal rings in bulk according to the embodiment of the present invention includes a base 1, a forming component, a gripping component 7, a feeding device 8, and a cutting device 9, wherein:
be equipped with the shaping part on the base 1, the shaping part is used for rubber seal's the thermoplastic molding, and material feeding unit 8 is used for carrying the rubber strip, and grabbing part 7 sets up on base 1, and grabbing part 7 is used for grabbing the rubber strip, and cutting device 9 is used for cutting off the rubber strip, and cutting device 9 and grabbing part 7 periodic work.
The upper end of the base 1 is fixedly connected, the upper end of the base 1 is fixedly connected with two side plates 12, and the upper ends of the side plates 12 are fixedly connected with a first top plate 13;
the forming part comprises a first push rod 2, an upper forming die 4, a second push rod 6 and a lower forming die 5, the first push rod 2 is fixedly connected to a first top plate 13, the output end of the first push rod 2 is fixedly connected with the upper forming die 4, the upper forming die 4 is provided with a heating device, the upper end of the base 1 is slidably connected with the lower forming die 5, the output end of the second push rod 6 is fixedly connected to the lower forming die 5, the second push rod 6 is fixedly connected to the base 1, and the lower forming die 5 at least comprises a first working state and a second working state:
when the lower forming die 5 is in the first working state, the lower forming die 5 is positioned below the grabbing part, and the first push rod 2 is positioned at the upper limit of the stroke;
when the lower forming die 5 is located at the second working state, the lower forming die 5 is located below the upper forming die 4, and the first push rod 2 is located at the lower limit of the stroke.
The side plate 12 is provided with a second top plate 14, the grabbing component 7 comprises a fixing plate 71, a second slider, a friction wheel 73, a rotating sleeve 74, a fixing sleeve 75, a first clamping plate 76 and a second clamping plate 77 which are fixedly connected to a supporting rod 17, the supporting rod 17 is fixedly connected with the fixing plate 71, the fixing plate 71 is provided with the friction wheel 73, the supporting rod 17 is rotatably connected with the rotating sleeve 74, the supporting rod 17 is fixedly connected with the fixing sleeve 75, the fixing sleeve 75 is fixedly connected with the first clamping plate 76, the rotating sleeve 74 is fixedly connected with the second clamping plate 77, the first clamping plate 76 is matched with the second clamping plate 77, the friction wheel 73 is in friction connection with the rotating sleeve 74, the second top plate 14 is located above the friction wheel 73, the second top plate 14 is fixedly connected with a friction strip 141, and the friction strip 141 is in friction connection with the friction wheel 73.
A second sliding groove is formed in the side plate 12, a second sliding block is connected to the second sliding groove in a sliding mode, a second top plate 14 is fixedly connected to the second sliding block, the second sliding groove is rotatably connected with a second threaded rod, the second threaded rod is connected to the second sliding block in a threaded mode, and one end of the second threaded rod penetrates through the outer side of the side plate 12 and is fixedly connected with an adjusting rod 15;
the fixed plate 71 is provided with a third sliding groove, the third sliding groove is slidably connected with a third sliding block 72, the third sliding block 72 is rotatably connected with a friction wheel 73, the third sliding groove is fixedly connected with one end of a third spring, and the other end of the third spring is fixedly connected to the third sliding block 72.
The cutting device 9 comprises a limiting block 91, a first connecting rod 92, a second connecting rod 93, a wedge block 94, a guide plate 95 and a guide block 96, the limiting block 91 is slidably connected in the first sliding groove, the limiting block 91 is positioned on one side of the first sliding block 16, which is far away from the feeding device 8, the limiting block 91 is fixedly connected with the first connecting rod 92, one end of the first connecting rod 92, which is far away from the limiting block 91, is fixedly connected with the second connecting rod 93, and the second connecting rod 93 is fixedly connected with the wedge block 94;
The first threaded rod 19 is a reciprocating screw.
The first push rod 2 and the second push rod 6 are electric push rods or pneumatic cylinder push rods or hydraulic cylinder push rods.
The base 1 has been seted up the storing chamber, and the storing chamber link up to the external world in one side of base 1, and the storing chamber is provided with cabinet door 11.
When the device is used, the first motor 3, the first push rod 2 and the second push rod 6 are started, the lower forming die 5 is initially positioned in a first working state, the first motor 3 rotates to drive the first sliding block 16 to move, the first threaded rod 19 is a reciprocating screw rod, the circular work is facilitated, when the first sliding block 16 drives the grabbing part 7 to be close to the feeding device 8, the friction strip 141 drives the friction wheel 73 to rotate, the friction wheel 73 drives the rotating sleeve 74 to rotate reversely, the second clamping plate 77 is separated from the first clamping plate 76, the preparation for grabbing the rubber strip is made, and when the rotating sleeve 74 rotates to limit, the friction wheel 73 is converted from rolling friction into sliding friction;
when the first slider 16 moves to drive the grabbing part 7 to move away from the feeding device 8, the first connecting rod 92 is sleeved with a third spring, one end of the third spring is fixedly connected to the first sliding chute, the other end of the third spring is fixedly connected to the limiting block 91, the third spring enables the limiting block 91 to move towards the direction close to the feeding device 8, when the first sliding block 16 moves, the wedge block 94 is driven to move under the action of the third spring, the wedge block 94 pushes the wedge plate 961 open through the cooperation of the first wedge surface 941 and the second wedge surface, the guide blocks 96 are pushed away from each other against the action of the extension spring 98, thereby driving the cutting knife 97 to move away from each other, realizing abdication for the grabbing component 7 to grab the rubber strip, and storing power for next cutting, the friction wheel 73 drives the rotating sleeve 74 to rotate in the forward direction, so that the second clamping plate 77 is close to the first clamping plate 76, and the rubber strip between the first rotating roller 81 and the second rotating roller 82 is grabbed and clamped; when the first slider 16 is far away from the upper limit of the stroke of the feeding device 8, the friction wheel 73 is far away from the friction strip 141, the second clamping plate 77 is far away from the first clamping plate 76 under the action of gravity, so that material clamping and discharging are realized, when the first slider 16 is far away from the upper limit of the stroke of the feeding device 8, the first slider 16 pushes the limiting block 91 to drive the wedge block 94 to move, the wedge block 94 is separated from the wedge plate 961, and under the action of the tension spring 98, the guide blocks 96 are driven to approach each other, so that the cutters 97 are driven to approach each other, so that the rubber strips are cut off, and the grabbing component 7 is matched with the cutting device 9 to realize periodic blanking, so that blanking is more stable;
the adjusting rod 15 is rotated to drive the second top plate 14 to move, so that the friction force among the friction wheel 73, the friction strip 141 and the rotating sleeve 74 can be adjusted, the friction is more stable, the length of the friction strip 141 can be adjusted, the distance between the grabbing part 7 and the feeding device 8 during unloading can be adjusted, and after unloading, because the lower forming die 5 is in the first working state, the cut rubber strip can directly fall into the lower forming die 5, so that continuous working is facilitated;
after the blanking is finished, the second push rod 6 acts to enable the lower forming die 5 to be switched to a second working state, at the moment, the first push rod 2 is started, the upper forming die 4 with the heating device presses the lower forming die 5 to achieve the forming of the sealing ring, the grabbing component 7 continuously works in the forming process and moves towards the direction close to the feeding device 8, after the forming is finished, the first push rod 2 drives the upper forming die 4 to move upwards, the second push rod 6 drives the lower forming die 5 to be switched to the first working state from the second working state, the blanking is carried out in the blanking process (manual or mechanical), the grabbing component 7 does not interfere with the forming work in the period, the time can be saved, the continuous working can be achieved by adjusting the action time sequence of the grabbing component 7, the cutting device 9, the first push rod 2 and the second push rod 6, and the blanking amount is stable.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. Fashioned rubber seal former in batches, its characterized in that includes base (1), shaping part, snatchs part (7), material feeding unit (8) and cutting device (9), wherein:
be equipped with the shaping part on base (1), the shaping part is used for rubber seal's thermoplastic molding, material feeding unit (8) are used for carrying the rubber strip, it sets up to snatch part (7) on base (1), it is used for snatching the rubber strip to snatch part (7), cutting device (9) are used for cutting off the rubber strip, cutting device (9) with snatch part (7) periodic work.
2. The batch forming rubber seal ring forming device according to claim 1, wherein the upper end of the base (1) is fixedly connected, the upper end of the base (1) is fixedly connected with two side plates (12), and the upper ends of the side plates (12) are fixedly connected with a first top plate (13);
the forming part comprises a first push rod (2), an upper forming die (4), a second push rod (6) and a lower forming die (5), the first push rod (2) is fixedly connected to the first top plate (13), the output end of the first push rod (2) is fixedly connected with the upper forming die (4), the upper forming die (4) is provided with a heating device, the upper end of the base (1) is slidably connected with the lower forming die (5), the output end of the second push rod (6) is fixedly connected to the lower forming die (5), the second push rod (6) is fixedly connected to the base (1), and the lower forming die (5) at least comprises a first working state and a second working state:
when the lower forming die (5) is in a first working state, the lower forming die (5) is positioned below the grabbing part (7), and the first push rod (2) is positioned at the upper limit of the stroke;
when the lower forming die (5) is in a second working state, the lower forming die (5) is positioned below the upper forming die (4), and the first push rod (2) is positioned at the lower limit of the stroke.
3. The batch forming rubber seal ring forming device according to claim 2, wherein a support plate (18) is fixedly connected to the upper end of the base (1), the support plate (18) is arranged corresponding to the feeding direction of the feeding device (8), the support plate (18) is provided with a first sliding groove, the first sliding groove is slidably connected with a first sliding block (16), the first sliding groove is rotatably connected with a first threaded rod (19), the first threaded rod (19) is in threaded connection with the first sliding block (16), one end of the first threaded rod (19) penetrates through the outer side of the support plate (18), the base (1) is fixedly connected with a first motor (3), the first motor (3) is in transmission connection with the first threaded rod (19), the first sliding block (16) is fixedly connected with a support rod (17), the support rod (17) is provided with the grabbing component (7).
4. The apparatus for forming rubber sealing rings by mass production as claimed in claim 3, wherein the side plate (12) is provided with a second top plate (14), the gripping member (7) comprises a fixing plate (71), a second slider, a friction wheel (73), a rotating sleeve (74), a fixing sleeve (75), a first clamping plate (76) and a second clamping plate (77), the fixing connection is fixedly connected to the supporting rod (17), the supporting rod (17) is fixedly connected with the fixing plate (71), the fixing plate (71) is provided with the friction wheel (73), the supporting rod (17) is rotatably connected with the rotating sleeve (74), the fixing sleeve (75) is fixedly connected to the supporting rod (17), the fixing sleeve (75) is fixedly connected with the first clamping plate (76), the rotating sleeve (74) is fixedly connected with the second clamping plate (77), the first clamping plate (76) is matched with the second clamping plate (77), the friction wheel (73) is in friction connection with the rotating sleeve (74), the second top plate (14) is located above the friction wheel (73), a friction strip (141) is fixedly connected to the second top plate (14), and the friction strip (141) is in friction connection with the friction wheel (73).
5. The batch forming rubber seal ring forming device according to claim 4, wherein the side plate (12) is provided with a second sliding groove, the second sliding groove is slidably connected with a second sliding block, the second top plate (14) is fixedly connected to the second sliding block, the second sliding groove is rotatably connected with a second threaded rod, the second threaded rod is in threaded connection with the second sliding block, and one end of the second threaded rod penetrates to the outer side of the side plate (12) and is fixedly connected with an adjusting rod (15);
the fixed plate (71) is provided with a third sliding groove, the third sliding groove is slidably connected with a third sliding block (72), the third sliding block (72) is rotatably connected with the friction wheel (73), the third sliding groove is fixedly connected with one end of a third spring, and the other end of the third spring is fixedly connected to the third sliding block (72).
6. The batch forming rubber seal ring forming device according to claim 3, wherein the cutting device (9) comprises a limiting block (91), a first connecting rod (92), a second connecting rod (93), a wedge-shaped block (94), a guide plate (95) and a guide block (96), the limiting block (91) is slidably connected in the first sliding groove, the limiting block (91) is positioned on one side of the first sliding block (16) far away from the feeding device (8), the limiting block (91) is fixedly connected with the first connecting rod (92), one end of the first connecting rod (92) far away from the limiting block (91) is fixedly connected with the second connecting rod (93), and the wedge-shaped block (94) is fixedly connected with the second connecting rod (93);
base (1) upper end fixedly connected with deflector (95), guide way (951) have been seted up along vertical direction in deflector (95), guide way (951) slidable ground is connected with two guide block (96), the both ends difference fixed connection of extension spring (98) is two guide block (96), one side fixedly connected with wedge plate (961) of guide block (96), wedge plate (961) correspond wedge (94) set up, the second wedge surface has been seted up in wedge plate (961), the second wedge surface sets up with first wedge surface (941) cooperation, two the equal fixedly connected with cutter (97) in one side that guide block (96) are relative.
7. The apparatus for forming rubber seal rings in batches according to claim 1, wherein the first rotating roller (81) and the second rotating roller (82) are both provided with guide roller grooves (83), and the guide roller grooves (83) are used for guiding the rubber strips.
8. The apparatus for forming rubber seal rings by mass molding according to claim 3, wherein said first threaded rod (19) is a reciprocating screw.
9. The apparatus for forming rubber sealing rings by mass production as claimed in claim 2, wherein said first push rod (2) and said second push rod (6) are electric push rods, pneumatic cylinder push rods or hydraulic cylinder push rods.
10. The batch forming rubber seal ring forming equipment according to claim 1, wherein the base (1) is provided with a storage cavity, the storage cavity penetrates to the outside at one side of the base (1), and the storage cavity is provided with a cabinet door (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121644243.0U CN215969712U (en) | 2021-07-20 | 2021-07-20 | Batch forming rubber seal ring forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121644243.0U CN215969712U (en) | 2021-07-20 | 2021-07-20 | Batch forming rubber seal ring forming equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215969712U true CN215969712U (en) | 2022-03-08 |
Family
ID=80516502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121644243.0U Active CN215969712U (en) | 2021-07-20 | 2021-07-20 | Batch forming rubber seal ring forming equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215969712U (en) |
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2021
- 2021-07-20 CN CN202121644243.0U patent/CN215969712U/en active Active
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