CN112589070A - Die-casting die of horizontal cold chamber die-casting machine and process thereof - Google Patents
Die-casting die of horizontal cold chamber die-casting machine and process thereof Download PDFInfo
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- CN112589070A CN112589070A CN202011364666.7A CN202011364666A CN112589070A CN 112589070 A CN112589070 A CN 112589070A CN 202011364666 A CN202011364666 A CN 202011364666A CN 112589070 A CN112589070 A CN 112589070A
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- wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
- B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
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- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a die-casting die of a horizontal cold chamber die-casting machine in the technical field of dies, which comprises a movable die and a fixed die, wherein the movable die is arranged on the left side of the fixed die, the outer wall of the right side of the movable die is provided with a die cavity, the outer wall of the right side of the fixed die is communicated with a filling pipeline, the filling pipeline comprises an inner pipe communicated with the outer wall of the right side of the fixed die, the outer wall of the inner pipe is sleeved with an outer pipe, supporting rods are uniformly arranged between the outer wall of the inner pipe and the inner wall of the outer pipe, the filling pipeline in the device consists of the outer pipe and the inner pipe and is separated by the supporting rods to form a cavity, so that the effect of heat insulation and heat preservation is achieved, the temperature reduction amplitude of a metal liquid raw material added into the filling pipeline is reduced, the metal liquid raw, further reducing the probability of cooling the metal liquid raw material in the filling pipeline.
Description
Technical Field
The invention relates to the technical field of dies, in particular to a die-casting die of a horizontal cold chamber die-casting machine and a process thereof.
Background
The die casting die is an important component of a die casting machine, when the die casting die of the existing horizontal cold chamber die casting machine is used, a metal liquid raw material in a heat preservation furnace is added into a filling pipeline of the die casting die, and the metal liquid raw material is input into a cavity of the die casting die by the die casting machine to produce a product, however, the heat preservation furnace and the pressure chamber of the horizontal cold chamber die casting machine are separated, so that the metal liquid raw material is completely outside in the process of adding the metal liquid raw material, the temperature of the metal liquid raw material is reduced, the filling pipeline of the die casting die is generally only a steel pipeline, and because the steel material has certain heat conductivity, the metal liquid raw material added into the filling pipeline from the outside is easy to cool, the metal liquid raw material is cooled, and when the die casting die begins to be used, the temperature of the metal filling pipeline is low, the metal liquid raw material added into the filling pipeline from the outside is easy to cool, the service performance of the die-casting die is influenced, and therefore the die-casting die of the horizontal cold chamber die-casting machine and the process thereof are provided.
Disclosure of Invention
The invention aims to provide a die-casting die of a horizontal cold chamber die-casting machine and a process thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a die casting die of horizontal cold chamber die casting machine, includes movable mould and cover half, the movable mould sets up the left side at the cover half, the die cavity has been seted up to movable mould right side outer wall, cover half right side outer wall and filling pipe intercommunication, filling pipe includes the inner tube with cover half right side outer wall intercommunication, the outer tube has been cup jointed to the inner tube outer wall, evenly be provided with the bracing piece between inner tube outer wall and the outer tube inner wall.
Preferably, the outer wall of the inner pipe is sleeved with the reinforcing ring, the inner wall of the reinforcing ring is uniformly provided with the insertion blocks, the outer wall of the inner pipe is uniformly provided with the insertion grooves matched with the insertion blocks, the insertion blocks are inserted into the inner cavities of the insertion grooves, and one end of the support rod, which is close to the inner pipe, is fixedly connected with the outer wall of the reinforcing ring.
Preferably, the mounting groove has been seted up to the anchor ring one end, mounting groove inner chamber fixed mounting has shrink spring, shrink spring keeps away from the one end and the stay cord fixed connection of mounting groove, the anchor ring other end has seted up the fluting, and fluting bottom inner wall rotates with the bull stick to be connected, shrink spring was kept away from to the stay cord one end and bull stick outer wall fixed connection, the trompil has been seted up to bull stick top outer wall, and trompil inner chamber top slip grafting threaded rod, the threaded rod outer wall has cup jointed the swivel nut, and swivel nut bottom outer wall and anchor ring top outer wall fixed connection.
Preferably, the inner wall of the outer pipe is provided with a heat insulation layer, the inner wall of the heat insulation layer is uniformly provided with heating sheets, and one end of the support rod, which is far away from the inner pipe, is fixedly connected with the inner wall of the heat insulation layer.
Preferably, the outer tube includes the outer tube body, outer tube body inner chamber rotates installs the commentaries on classics pipe, insulating layer outer wall fixed mounting has the connecting block, the commentaries on classics intraductal wall seted up with connecting block assorted spread groove, and the connecting block is located the inner chamber of spread groove, and the perpendicular cross-section of connecting block is trapezoidal, outer tube body left side outer wall fixed mounting has the screwed pipe, the ring channel has been seted up to cover half right side outer wall, and the screwed pipe inserts in the inner chamber of ring channel, and the ring channel inner wall set up with screwed pipe assorted internal thread, the outer tube body includes two sets of branch pipes, and is two sets of the one end that the branch pipe is close to each other is through two sets.
Preferably, the circular groove has been seted up on outer tube body outer wall left side, and the circular groove inner chamber rotates and installs the rotation cover, the rotation cover is overlapped on the outer wall of rotating tube, the equal fixed mounting of rotation cover top inner wall and rotating tube front side outer wall has the conducting strip, and the downside conducting strip is connected with the heating plate.
Preferably, the process for the die-casting die of the horizontal cold chamber die-casting machine comprises the following steps:
s1: when the die-casting die is used, the movable die and the fixed die are assembled, then the metal liquid in the heat-insulating furnace is added into the filling pipeline, the material pushing equipment in the die-casting machine extrudes the raw material in the filling pipeline into a cavity of the die-casting die, after the metal liquid is cooled and formed, the movable die and the fixed die are separated, and a formed product is taken out of the cavity;
s2: before the die casting die uses, through heating plate work heating, heat the filling pipe, guarantee that the temperature in the filling pipe can not be too low to the filling pipe who comprises inner tube and outer tube can play a heat preservation effect, makes the metal liquid that is in filling pipe inside take place refrigerated probability and reduces.
Compared with the prior art, the invention has the beneficial effects that:
1. the filling pipeline in the device consists of an outer pipe and an inner pipe, and is separated by the supporting rod to form a cavity, so that the heat insulation effect is achieved, the temperature reduction amplitude of the metal liquid raw material added into the filling pipeline is reduced, the metal liquid raw material in the filling pipeline is prevented from being rapidly cooled, and the service performance of the die-casting die is improved;
2. the temperature in the pouring pipeline is not too low through the heat insulation layer and the heating sheet, the probability that metal liquid raw materials are cooled in the pouring pipeline is further reduced, the heating sheet also has a preheating effect, the temperature in the pouring pipeline is not too low when the die-casting die starts to be used, the metal liquid raw materials added into the pouring pipeline from the outside are prevented from being cooled, and the using performance of the die-casting die is improved;
3. through reinforcing ring cover on the outer wall of inner tube, consolidate and strengthen the inner tube, reduce the inner tube because of inside high temperature takes place the expanded probability to reinforcing ring also can conduct the temperature on the inner tube, avoids the inner tube temperature higher, protects the inner tube.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side view of the pouring tube of the present invention;
FIG. 3 is an enlarged view of the structure at A of the present invention;
FIG. 4 is a schematic sectional view of the connection between the fixed mold and the outer tube according to the present invention.
In the figure: 1. moving the mold; 2. fixing a mold; 3. a cavity; 4. filling a pipeline; 41. an inner tube; 42. an outer tube; 421. an outer tube body; 422. pipe rotation; 423. a threaded pipe; 424. pipe distribution; 425. clamping a hoop; 426. partitioning; 427. rotating the sleeve; 43. a support bar; 44. reinforcing rings; 441. mounting grooves; 442. a retraction spring; 443. pulling a rope; 444. a rotating rod; 445. a threaded rod; 45. inserting a block; 46. a thermal insulation layer; 47. a heating plate; 48. and (4) connecting the blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: referring to fig. 1, a die casting mold of a horizontal cold chamber die casting machine comprises a movable mold 1 and a fixed mold 2;
referring to fig. 1, a movable mold 1 is arranged on the left side of a fixed mold 2, a cavity 3 is arranged on the outer wall of the right side of the movable mold 1, and the outer wall of the right side of the fixed mold 2 is communicated with a filling pipeline 4;
referring to fig. 1 and 2, the filling pipe 4 includes an inner pipe 41 communicated with the outer wall of the right side of the fixed mold 2, the outer wall of the inner pipe 41 is sleeved with an outer pipe 42, support rods 43 are uniformly arranged between the outer wall of the inner pipe 41 and the inner wall of the outer pipe 42, a heat preservation and insulation effect (poor air heat conduction effect) is achieved through a cavity formed between the outer wall of the inner pipe 41 and the inner wall of the outer pipe 42, the heat conduction efficiency of the filling pipe 4 is reduced, the probability of rapid cooling of the metal liquid in the filling pipe 4 is reduced, the use performance of the die-casting mold is improved, and the right side of the outer pipe 42 is provided with an annular baffle plate which shields a gap between the right side of the;
referring to fig. 1 and 2, a reinforcing ring 44 is sleeved on the outer wall of the inner tube 41, inserting blocks 45 are uniformly arranged on the inner wall of the reinforcing ring 44, inserting slots matched with the inserting blocks 45 are uniformly formed in the outer wall of the inner tube 41, the inserting blocks 45 are inserted into the inner cavity of the inserting slots, the materials of the inserting blocks 45 and the reinforcing ring 44 are consistent, the contact area between the reinforcing ring 44 and the inner tube 41 is increased, the strength of the inner tube 41 is increased, the probability that the inner tube 41 expands due to overhigh internal temperature is reduced (the temperature inside the inner tube 41 is higher due to metal liquid), the inner tube 41 is prevented from being damaged, one end of the supporting rod 43 close to the inner tube 41 is fixedly connected with the outer wall of the reinforcing ring 44, the reinforcing ring 44 is made of metal and is copper or steel, the inner tube 41 is reinforced, the probability that the inner tube 41 expands due to overhigh internal temperature is reduced, and the temperature on the inner, protecting the inner tube 41;
referring to fig. 2 and 3, a mounting groove 441 is formed at one end of the reinforcing ring 44, a retraction spring 442 is fixedly mounted in an inner cavity of the mounting groove 441, one end of the retraction spring 442 away from the mounting groove 441 is fixedly connected with a pulling rope 443, the other end of the reinforcing ring 44 is formed with a slot, an inner wall of a bottom of the slot is rotatably connected with a rotating rod 444, one end of the pulling rope 443 away from the retraction spring 442 is fixedly connected with an outer wall of the rotating rod 444, an opening is formed in an outer wall of a top of the rotating rod 444, a threaded rod 445 is slidably inserted at a top end of the inner cavity of the opening, a threaded sleeve is sleeved on an outer wall of the threaded rod 445, an outer wall of a bottom of the threaded sleeve is fixedly connected with an outer wall of a top of the reinforcing ring 44, the rotating rod 445 drives the rotating rod 444 to rotate, the pulling rope 443 is wound on an outer wall of the rotating rod 444, the retraction spring 442 is tightened, fastening force of the, the use performance of the die-casting die is increased;
referring to fig. 2, a heat insulation layer 46 is disposed on an inner wall of an outer tube 42, the heat insulation layer 46 is made of polystyrene board, so as to reduce an influence of an external temperature on an inner portion of an inner tube 41, reduce a probability of transmitting an internal temperature of a filling pipe 4, and ensure that a probability of cooling a metal liquid raw material inside the filling pipe 4 is reduced, heating plates 47 are uniformly disposed on an inner wall of the heat insulation layer 46, the heating plates 47 are fixedly mounted on the heat insulation layer 46, and work through the heating plates 47 to heat the internal portion of the filling pipe 4, so as to ensure that an internal temperature of the filling pipe 4 is not too low, further reduce a probability of cooling the metal liquid raw material inside the filling pipe 4, and the heating plates 47 also have a preheating effect, so that a temperature inside the filling pipe 4 is not too low when a die casting mold is used, and the metal liquid, the performance of the die-casting die is improved, and one end of the support rod 43, which is far away from the inner tube 41, is fixedly connected with the inner wall of the heat insulation layer 46;
referring to fig. 2 and 4, the outer tube 42 includes an outer tube body 421, a rotating tube 422 is rotatably installed in an inner cavity of the outer tube body 421, a connecting block 48 is fixedly installed on an outer wall of the heat insulating layer 46, a connecting groove matched with the connecting block 48 is formed in an inner wall of the rotating tube 422, the connecting block 48 is located in the inner cavity of the connecting groove, the outer tube 42 moves rightward, the connecting block 48 can be moved out of the inner cavity of the connecting groove, a vertical cross section of the connecting block 48 is trapezoidal, a threaded tube 423 is fixedly installed on an outer wall on a left side of the outer tube body 421, an annular groove is formed in an outer wall on a right side of the fixed mold 2, the threaded tube 423 is inserted into the inner cavity of the annular groove, an internal thread matched with the threaded tube 423 is formed in the inner wall of the annular groove, the outer tube 42 is rotated to move out of the inner cavity of, when the outer pipe 42 rotates, only the outer pipe body 421 rotates, but the rotating pipe 422 does not rotate, so that the heat insulation layer 46 is prevented from being abraded due to the rotation of the rotating pipe 422, the outer pipe body 421 comprises two groups of branch pipes 424, one ends, close to each other, of the two groups of branch pipes 424 are connected through two groups of hoops 425, the two groups of hoops 425 are connected through bolts, the hoops 425 are taken down from the outer wall of the branch pipes 424, the outer pipe body 421 is split into the two groups of branch pipes 424, the right branch pipes 424 can be split into two sub-blocks 426, the outer pipe 42 is split into a plurality of parts which can be independently replaced or the interior of the outer pipe 42 can be treated, and the right branch pipes 424 comprise the two;
referring to fig. 2 and 4, a circular groove is formed in the left side of the outer wall of the outer tube body 421, a rotating sleeve 427 is rotatably installed in the inner cavity of the circular groove, the rotating sleeve 427 is sleeved on the outer wall of the rotating tube 422, conductive plates are fixedly installed on the inner wall of the top of the rotating sleeve 427 and the outer wall of the front side of the rotating tube 422, the lower conductive plate is connected with the heating plate 47, the lower conductive plate is electrically connected with the heating plate 47 through a wire, the upper conductive plate is electrically connected with an external power supply through a wire, and the two sets of conductive plates are attached by rotating the rotating sleeve 427, so that the heating plate 47 is powered on to work.
A process for a die-casting die of a horizontal cold chamber die-casting machine comprises the following steps:
s1: when the die-casting die is used, the movable die 1 and the fixed die 2 are assembled, then the metal liquid in the heat-preserving furnace is added into the filling pipeline 4, the material pushing equipment in the die-casting machine extrudes the raw material in the filling pipeline 4 into the cavity 3 of the die-casting die, after the metal liquid is cooled and formed, the movable die 1 and the fixed die 2 are separated, and the formed product is taken out of the cavity 3;
s2: before the die casting die uses, heat through heating plate 47 work, heat filling pipe 4, guarantee that the temperature in the filling pipe 4 can not be too low, and filling pipe 4 that comprises inner tube 41 and outer tube 42 can play a heat preservation effect, make the metal liquid that is in filling pipe 4 inside take place refrigerated probability and reduce, further reduce the metal liquid raw materials and take place refrigerated probability in filling pipe 4 inside, and heating plate 47 also plays a preheating effect, through the cavity that forms between inner tube 41 outer wall and the outer tube 42 inner wall, play a thermal-insulated effect of heat preservation, reduce the efficiency of filling pipe 4 heat conduction, make the metal liquid that is in filling pipe 4 inside take place quick refrigerated probability and reduce, increase die casting die performance, ensure the quality of product processing.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a die casting die of horizontal cold chamber die casting machine, includes movable mould (1) and cover half (2), its characterized in that: movable mould (1) sets up the left side at cover half (2), die cavity (3) have been seted up to movable mould (1) right side outer wall, cover half (2) right side outer wall and filling pipe (4) intercommunication, filling pipe (4) include with inner tube (41) of cover half (2) right side outer wall intercommunication, inner tube (41) outer wall has cup jointed outer tube (42), evenly be provided with bracing piece (43) between inner tube (41) outer wall and outer tube (42) inner wall.
2. The die casting mold of the horizontal cold chamber die casting machine according to claim 1, characterized in that: the outer wall of the inner pipe (41) is sleeved with a reinforcing ring (44), the inner wall of the reinforcing ring (44) is uniformly provided with an inserting block (45), the outer wall of the inner pipe (41) is uniformly provided with an inserting groove matched with the inserting block (45), the inserting block (45) is inserted into an inner cavity of the inserting groove, and one end, close to the inner pipe (41), of the supporting rod (43) is fixedly connected with the outer wall of the reinforcing ring (44).
3. The die casting mold of the horizontal cold chamber die casting machine according to claim 2, characterized in that: mounting groove (441) has been seted up to reinforcement ring (44) one end, mounting groove (441) inner chamber fixed mounting has shrink spring (442), the one end and stay cord (443) fixed connection that mounting groove (441) were kept away from to shrink spring (442), the fluting has been seted up to the reinforcement ring (44) other end, and fluting bottom inner wall rotates with bull stick (444) to be connected, the one end and bull stick (444) outer wall fixed connection that shrink spring (442) were kept away from to stay cord (443), the trompil has been seted up to bull stick (444) top outer wall, and the slip of trompil inner chamber top is pegged graft there is threaded rod (445), threaded rod (445) outer wall has cup jointed the swivel nut, and swivel nut bottom outer wall and reinforcement ring (44) top outer wall fixed.
4. The die casting mold of the horizontal cold chamber die casting machine according to claim 2, characterized in that: the inner wall of the outer pipe (42) is provided with a heat insulation layer (46), the inner wall of the heat insulation layer (46) is uniformly provided with heating sheets (47), and one end, away from the inner pipe (41), of the support rod (43) is fixedly connected with the inner wall of the heat insulation layer (46).
5. The die casting mold of the horizontal cold chamber die casting machine according to claim 4, wherein: the outer tube (42) comprises an outer tube body (421), a rotating tube (422) is rotatably arranged in the inner cavity of the outer tube body (421), the outer wall of the heat insulation layer (46) is fixedly provided with a connecting block (48), the inner wall of the rotating pipe (422) is provided with a connecting groove matched with the connecting block (48), and the connecting block (48) is positioned in the inner cavity of the connecting groove, and the vertical section of the connecting block (48) is trapezoidal, a threaded pipe (423) is fixedly arranged on the outer wall of the left side of the outer pipe body (421), an annular groove is formed in the outer wall of the right side of the fixed die (2), the threaded pipe (423) is inserted into the inner cavity of the annular groove, the inner wall of the annular groove is provided with internal threads matched with the threaded pipe (423), the outer tube body (421) comprises two groups of branch tubes (424), one ends of the branch tubes (424) close to each other are connected through two groups of hoops (425), and the right side of the branch tubes (424) comprises two groups of branch blocks (426).
6. The die casting mold of the horizontal cold chamber die casting machine according to claim 5, wherein: the outer tube body (421) outer wall left side has been seted up the ring groove, and the ring groove inner chamber rotates and installs and rotate cover (427), it overlaps on the outer wall of rotating tube (422) to rotate cover (427), it has the conducting strip to rotate cover (427) top inner wall and the equal fixed mounting of rotating tube (422) front side outer wall, and the downside conducting strip is connected with heating plate (47).
7. The process of die casting molds of horizontal cold chamber die casting machines according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1: when the die-casting die is used, the movable die (1) and the fixed die (2) are assembled, then the metal liquid in the heat-insulating furnace is added into the filling pipeline (4), the material pushing equipment in the die-casting machine extrudes the raw material in the filling pipeline (4) into the cavity (3) of the die-casting die, after the metal liquid is cooled and formed, the movable die (1) and the fixed die (2) are separated, and the formed product is taken out of the cavity (3);
s2: before the die-casting die is used, the heating sheet (47) is used for heating, the pouring pipeline (4) is heated, the temperature in the pouring pipeline (4) is guaranteed not to be too low, the pouring pipeline (4) consisting of the inner pipe (41) and the outer pipe (42) can play a heat preservation effect, and the probability of cooling metal liquid in the pouring pipeline (4) is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364666.7A CN112589070A (en) | 2020-11-27 | 2020-11-27 | Die-casting die of horizontal cold chamber die-casting machine and process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364666.7A CN112589070A (en) | 2020-11-27 | 2020-11-27 | Die-casting die of horizontal cold chamber die-casting machine and process thereof |
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| CN112589070A true CN112589070A (en) | 2021-04-02 |
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| CN209772438U (en) * | 2018-12-21 | 2019-12-13 | 湖北旺腾实业有限公司 | Wax sprayer nozzle |
| CN109622918A (en) * | 2018-12-25 | 2019-04-16 | 许昌中发耐磨材料研究所有限公司 | A kind of injecting molding die and forming method of zinc-containing alloy pipe |
| CN211438050U (en) * | 2019-12-11 | 2020-09-08 | 厦门市佳嘉达机械有限公司 | A penetrate feed cylinder for die casting machine penetrates material device |
| CN211990879U (en) * | 2020-04-01 | 2020-11-24 | 吴赞扬 | Die casting machine feeding section of thick bamboo heating device |
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