Vacuum packaging equipment for creep feed and nursing feed

Abstract

The utility model belongs to the technical field of feed vacuum packaging, and particularly relates to milk replacer and nursing feed vacuum packaging equipment which comprises a packaging table. A placing groove and a vacuum cavity are formed in the packaging table, an inserting groove is formed in the peripheral side of the vacuum cavity, a sealing frame is inserted into the inserting groove, fixing plates are fixedly connected to the two side walls of the packaging table, two rod holes are formed in each fixing plate, and a limiting sliding rod is inserted into each rod hole in a penetrating mode; the top ends of the two limiting sliding rods on the same side are fixedly connected with connecting plates, and a sealing frame is fixedly connected between the two connecting plates. In the emptying process, by arranging the triggering mechanism, the packaging bag can be plastically packaged in time after gas in the packaging bag is completely pumped out, the time of the emptying device in a negative pressure state for a long time is shortened through timely plastic packaging, the sealing performance and the structural integrity of the device are protected, and the service life of the emptying device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of feed vacuum packaging, in particular to a vacuum packaging device for creep feed and nursery feed. Background Technique

[0002] Creep feed is a kind of feed formulated to replace whole milk. Nursery feed generally refers to the feed used from weaning of piglets to the end of the nursery period. During the production process of creep feed and nursery feed, it is necessary to carry out vacuum packaging to prevent quality problems such as oxidation and mildew of the feed during storage and transportation, which is crucial for maintaining the nutritional components, taste and safety of creep feed and nursery feed.

[0003] A Chinese patent with the publication number of CN221563720U discloses a feed production vacuum packaging machine, which includes a vacuum pump; a placement rack is slidably connected inside the vacuum pump; a shaking plate is arranged inside the placement rack; a first shaking spring is sleeved outside the top of the return spring column; the top of the first shaking spring is fixed to the placement rack; the bottom of the first shaking spring is fixed to the shaking plate; a second shaking spring is sleeved outside the bottom of the return spring column; the top of the second shaking spring is fixed to the shaking plate; the bottom of the second shaking spring is fixed to the shaking plate. Through the structural cooperation design of the shaking plate, shaking column and shaking seat, the feed to be vacuumized placed on the shaking plate can be shaken, and the granular feed in the packaging bag can be shaken flat in the packaging bag, which is convenient to improve the yield rate of feed vacuum packaging, and also convenient for the handling and stacking of feed after vacuum extraction, further improving the use effect of the device.

[0004] In the existing vacuum packaging operation, since the feed is a large amount of wet materials, a large amount of water vapor will be carried during evacuation. After long-term operation, the evacuation equipment will accumulate water and become wet, and it is easy to be corroded. Secondly, after evacuation, plastic sealing cannot be achieved in time, resulting in long-term negative pressure operation of the evacuation device, affecting the service life of the evacuation device; therefore, a vacuum packaging device for creep feed and nursery feed is proposed for the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the existing technology and solve the problems proposed in the above background technology, the utility model proposes a vacuum packaging device for creep feed and nursery feed.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A vacuum packaging device for creep feed and nursery feed of the utility model includes a packaging table; a placement groove and a vacuum chamber are provided on the packaging table, slots are provided on the periphery of the vacuum chamber, a sealing frame is inserted into the slots, fixing plates are fixedly connected to both side walls of the packaging table, two rod holes are provided on each fixing plate, a limiting slide rod is inserted into each rod hole, connecting plates are fixedly connected to the tops of the two limiting slide rods on the same side, and a sealing frame is fixedly connected between the two connecting plates. A first pneumatic cylinder is installed on the outer side wall of the packaging table, a first pneumatic rod is assembled at the acting end of the first pneumatic cylinder, a connecting block is fixedly connected to the top of the first pneumatic rod, and one side wall of the connecting block is fixedly connected to the sealing frame. When vacuum packaging the feed, first place the plastic bag containing the feed in the placement groove, and make the opening of the plastic bag pass through the cloth bag opening into the vacuum chamber. Then rotate the pressing frame to press and limit the plastic bag. Then start the first pneumatic cylinder. With the cooperation of the limiting slide rod, the sealing frame is moved down into the slot, so as to be able to press and limit the bag mouth and make the inside of the vacuum chamber form a sealed state, facilitating the subsequent evacuation operation.

[0007] Preferably, an L-shaped sponge block and a filter mesh plate are installed at the bottom of the vacuum chamber, and the filter mesh plate is arranged beside the L-shaped sponge block. A pump body is installed on the top side of the sealing frame. The input hole of the pump body is connected with an air extraction pipe, and the lower port of the air extraction pipe is communicated with the sealing frame. The output hole of the pump body is connected with an exhaust pipe. A cloth bag opening is provided on one side of the vacuum chamber, and the cloth bag opening is communicated with the vacuum chamber. During the evacuation process, start the pump body to extract the gas in the vacuum chamber through the air extraction pipe and discharge it through the exhaust pipe, so that the gas in the packaging bag is continuously extracted. In this process, the gas in the packaging bag is effectively removed to form a vacuum state, which helps to extend the shelf life of the feed and prevent oxidation. At the same time, with the cooperation of the L-shaped sponge block, the water vapor of the wet feed can be absorbed to keep the inside of the packaging bag and the vacuum chamber dry, and at the same time avoid the phenomenon that the equipment gets wet due to the release of a large amount of water vapor during the evacuation process, preventing the corrosion and damage of the evacuation equipment. By setting the filter mesh plate, the impurities contained in the gas can be intercepted, preventing the blockage of the evacuation pipeline.

[0008] Preferably, a through hole is formed in the top of the sealing frame, a fixing cylinder is fixedly connected to the port of the through hole, a piston block is arranged in the fixing cylinder, a spring is fixedly connected between the bottom side of the piston block and the top side of the sealing frame, a movable rod is fixedly connected to the top side of the piston block, a fixing block is fixedly connected to the top end of the movable rod, a movable electrode plate is installed on the fixing block, a fixing frame is fixedly connected to the top side of the sealing frame, a fixed electrode plate is installed on the inner wall of the fixing frame, an indicator light is installed on the top side of the fixing frame, and the indicator light, the fixed electrode plate and the movable electrode plate are electrically connected. A second pneumatic cylinder is installed on one side wall of the sealing frame, a second pneumatic rod is assembled at the acting end of the second pneumatic cylinder, a thermoplastic main board is fixedly connected to the bottom end of the second pneumatic rod, a heating pipe is arranged in the thermoplastic main board, a controller is installed on the top side of the sealing frame, the second pneumatic cylinder is electrically connected to the indicator light, a thermoplastic auxiliary board is assembled at one end of the placing groove, and the thermoplastic auxiliary board is arranged directly below the thermoplastic main board. A pressing frame is rotatably installed in the placing groove. During the evacuation process, as the gas is continuously pumped out, the air pressure in the vacuum chamber gradually decreases. Since the fixing cylinder is in communication with the vacuum chamber, the air pressure in the fixing cylinder will also decrease accordingly, forcing the piston block to move downward. The spring is compressed under force, and the movable rod drives the movable electrode plate to move downward. When the movable electrode plate moves downward to contact the fixed electrode plate, the indicator light is powered on and lights up, and transmits the received signal to the controller. The controller receives the information and controls the start of the second pneumatic cylinder, so that the second pneumatic rod drives the thermoplastic main board to move downward. With the cooperation of the thermoplastic auxiliary board, the sealing of the packaging bag opening can be realized. By setting the triggering mechanism, it can ensure that the packaging bag is sealed in time after the gas in the packaging bag is completely pumped out. Timely sealing reduces the time that the evacuation device is in a negative pressure state for a long time, which is beneficial to protecting the airtightness and structural integrity of the equipment and extending the service life of the evacuation equipment.

[0009] The beneficial effects of the present invention are as follows:

[0010] 1. During the evacuation process of the present invention, the pump body is started, so that the gas in the vacuum chamber is pumped out by the suction pipe and discharged through the exhaust pipe, so that the gas in the packaging bag is continuously pumped out. During this process, the gas in the packaging bag is effectively removed to form a vacuum state, which helps to extend the shelf life of the feed and prevent oxidation. At the same time, with the cooperation of the L-shaped sponge block, the water vapor of the wet feed can be absorbed, maintaining a dry environment inside the packaging bag and the vacuum chamber, and at the same time avoiding the phenomenon that the equipment becomes wet due to the release of a large amount of water vapor during the evacuation process, preventing the corrosion and damage of the evacuation equipment. By setting the filter screen plate, the impurities contained in the gas can be intercepted, preventing the blockage of the evacuation pipeline;

[0011] 2. During the evacuation process of the present utility model, as the gas is continuously pumped out, the air pressure in the vacuum chamber gradually decreases. Since the fixed cylinder is in communication with the vacuum chamber, the air pressure in the fixed cylinder will also decrease accordingly, forcing the piston block to move downward. The spring is compressed under force, and the movable rod drives the movable electrode plate to move downward. When the movable electrode plate moves downward to contact the fixed electrode plate, the indicator light is energized and lights up, and transmits the received signal to the controller. The controller receives the information and controls the start of the second pneumatic cylinder, so that the second pneumatic rod drives the thermoplastic main board to move downward. With the cooperation of the thermoplastic sub-board, the plastic sealing of the bag mouth can be realized. By setting the triggering mechanism, it can ensure that the plastic sealing of the packaging bag is carried out in time after the gas in the packaging bag is completely pumped out. Timely plastic sealing reduces the time that the evacuation device is in a negative pressure state for a long time, which is beneficial to protecting the sealing performance and structural integrity of the equipment, and prolongs the service life of the evacuation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic three-dimensional structure diagram of the whole device;

[0014] Figure 2 It is a schematic three-dimensional structure diagram of the whole sectional view of the device;

[0015] Figure 3 It is a schematic three-dimensional structure diagram of the partial sectional view of the device;

[0016] Figure 4 It is a schematic three-dimensional structure diagram of the triggering mechanism;

[0017] Figure 5 It is a schematic three-dimensional structure diagram of the plastic sealing mechanism;

[0018] Figure 6 It is a schematic three-dimensional structure diagram of the vacuum chamber assembly.

[0019] In the figure: 1, encapsulation table; 2, placement slot; 3, vacuum chamber; 4, slot; 5, sealing frame; 6, fixed plate; 7, limiting slide bar; 8, connecting plate; 9, first pneumatic cylinder; 10, first pneumatic rod; 11, connecting block; 12, fixing bracket; 13, through hole; 14, fixing cylinder; 15, piston block; 16, spring; 17, movable rod; 18, fixing block; 19, movable electrode plate; 20, fixed electrode plate; 21, indicator light; 22, pump body; 23, air extraction pipe; 24, exhaust pipe; 25, cloth bag mouth; 26, L-shaped sponge block; 27, filter screen plate; 28, second pneumatic cylinder; 29, thermoplastic main board; 30, heating pipe; 31, thermoplastic sub-board; 32, pressing frame; 33, controller. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figure 1-6As shown, a vacuum packaging device for spawning materials and nursery materials comprises a packaging platform 1; a placement slot 2 and a vacuum chamber 3 are provided on the packaging platform 1, a slot 4 is provided on the peripheral side of the vacuum chamber 3, a sealing frame 5 is inserted in the slot 4, fixing plates 6 are fixedly connected to both side walls of the packaging platform 1, each fixing plate 6 is provided with two rod holes, each rod hole is inserted with a limiting slide bar 7, the top ends of the two limiting slide bars 7 on the same side are fixedly connected with a connecting plate 8, a sealing frame 5 is fixedly connected between the two connecting plates 8, and a sealing frame 5 is installed on the outer side wall of the packaging platform 1. A pneumatic cylinder 9, the working end of the first pneumatic cylinder 9 is equipped with a first pneumatic rod 10, the top of the first pneumatic rod 10 is fixedly connected with a connecting block 11, and a side wall of the connecting block 11 is fixedly connected to the sealing frame 5, a pump body 22 is installed on the top side of the sealing frame 5, the input hole of the pump body 22 is connected with an exhaust pipe 23, and the lower end of the exhaust pipe 23 is connected to the sealing frame 5, the output hole of the pump body 22 is connected with an exhaust pipe 24, and a bag opening 25 is opened on one side of the vacuum chamber 3, and the bag opening 25 is connected to the vacuum chamber 3; when the feed is pumped, the feed is pumped to the bottom of the vacuum chamber 3, and ... During vacuum packaging, firstly, the plastic bag containing feed is placed in the placement slot 2, and the opening of the plastic bag is inserted into the vacuum chamber 3 from the bag opening 25, then the pressing frame 32 is rotated to press and limit the packaging bag containing plastic, then the first pneumatic cylinder 9 is started, and with the cooperation of the limiting slide bar 7, the first pneumatic rod 10 drives the sealing frame 5 to move downward, so that the sealing frame 5 moves downward into the slot 4, so that the opening of the packaging bag can be pressed and limited, and the inside of the vacuum chamber 3 is sealed, then the pump body 22 is started to make the vacuum chamber 3 The gas inside is extracted by the exhaust pipe 23 and discharged through the exhaust pipe 24, so that the gas in the packaging bag is continuously extracted. In this process, the gas in the packaging bag is effectively removed to form a vacuum state, which helps to extend the shelf life of the feed and prevent oxidation. At the same time, with the cooperation of the L-shaped sponge block 26, the water vapor of the wet feed can be absorbed to maintain a dry environment inside the packaging bag and the vacuum chamber 3, while avoiding the phenomenon of equipment moisture caused by the release of a large amount of water vapor during the emptying process, thereby preventing corrosion and damage to the emptying equipment.

[0022] An L-shaped sponge block 26 and a filter screen plate 27 are installed at the bottom of the vacuum chamber 3, and the filter screen plate 27 is arranged beside the L-shaped sponge block 26; during the emptying process, the L-shaped sponge block 26 can be arranged to absorb the water vapor of the wet feed and maintain the dry environment inside the packaging bag. At the same time, the phenomenon of equipment moisture caused by releasing a large amount of water vapor during the emptying process is avoided, and corrosion and damage to the emptying equipment are prevented. By arranging the filter screen plate 27, impurities contained in the gas can be intercepted to prevent blockage of the emptying pipeline.

[0023] See also Figure 4-5As shown, a through hole 13 is provided at the top of the sealing frame 5. A fixing cylinder 14 is fixedly connected to the port of the through hole 13. A piston block 15 is arranged inside the fixing cylinder 14. A spring 16 is fixedly connected between the bottom side of the piston block 15 and the top side of the sealing frame 5. A movable rod 17 is fixedly connected to the top side of the piston block 15. A fixing block 18 is fixedly connected to the top end of the movable rod 17. A movable electrode plate 19 is installed on the fixing block 18. A fixing frame 12 is fixedly connected to the top side of the sealing frame 5. A fixed electrode plate 20 is installed on the inner wall of the fixing frame 12. An indicator light 21 is installed on the top side of the fixing frame 12. And the indicator light 21, the fixed electrode plate 20 and the movable electrode plate 19 are electrically connected. A second pneumatic cylinder 28 is installed on one side wall of the sealing frame 5. The acting end of the second pneumatic cylinder 28 is equipped with a second pneumatic rod. The bottom end of the second pneumatic rod is fixedly connected to a thermoplastic main board 29. A heating pipe 30 is arranged inside the thermoplastic main board 29. A controller 33 is installed on the top side of the sealing frame 5. The second pneumatic cylinder 28 is electrically connected to the indicator light 21. One end of the placement groove 2 is equipped with a thermoplastic sub-board 31. And the thermoplastic sub-board 31 is arranged directly below the thermoplastic main board 29. A pressing frame 32 is rotatably installed in the placement groove 2; during the evacuation process, as the gas is continuously pumped out, the air pressure in the vacuum chamber 3 gradually decreases. Since the fixing cylinder 14 is in communication with the vacuum chamber 3, the air pressure inside the fixing cylinder 14 will also decrease accordingly, forcing the piston block 15 to move downward. The spring 16 is compressed under force. The movable rod 17 drives the movable electrode plate 19 to move downward. When the movable electrode plate 19 moves downward to contact the fixed electrode plate 20, the indicator light 21 is powered on and lights up, and transmits the received signal to the controller 33. The controller 33 receives the information and controls the start of the second pneumatic cylinder 28, so that the second pneumatic rod drives the thermoplastic main board 29 to move downward. With the cooperation of the thermoplastic sub-board 31, the sealing of the bag opening can be realized. By setting the triggering mechanism, when all the gas in the packaging bag is pumped out, the packaging bag can be sealed in time, ensuring that the packaging bag is sealed in time after all the gas inside is pumped out. Timely sealing reduces the time that the evacuation device is in a negative pressure state for a long time, which is beneficial to protecting the sealing performance and structural integrity of the equipment and prolonging the service life of the evacuation equipment.

[0024] Working principle: In the existing vacuum packaging operation, since the feed is a large amount of wet materials, a large amount of water vapor will be carried during evacuation. After long-term operation, the evacuation equipment will accumulate water and become wet, and it is easily corroded and damaged. Secondly, after evacuation, plastic sealing cannot be achieved in time, resulting in the evacuation device operating under negative pressure for a long time, which affects the service life of the evacuation device. Therefore, in view of the above problems, a vacuum packaging device for creep feed and nursery feed is proposed. When vacuum packaging the feed, first place the plastic bag containing the feed in the placement groove 2, and make the opening of the plastic bag pass through the cloth bag opening 25 into the vacuum chamber 3. Then rotate the pressing frame 32 to press and limit the plastic packaging bag. Then start the first pneumatic cylinder 9. With the cooperation of the limit slide rod 7, the first pneumatic rod 10 drives the sealing frame 5 to move downward, so that the sealing frame 5 moves downward into the slot 4, thereby being able to press and limit the bag mouth and making the inside of the vacuum chamber 3 form a sealed state. Then start the pump body 22 to extract the gas in the vacuum chamber 3 through the exhaust pipe 23 and discharge it through the exhaust pipe 24, so that the gas in the packaging bag is continuously extracted. During this process, the gas in the packaging bag is effectively removed to form a vacuum state, which helps to extend the shelf life of the feed and prevent oxidation. At the same time, with the cooperation of the L-shaped sponge block 26, the water vapor of the wet feed can be absorbed, maintaining a dry environment inside the packaging bag and the vacuum chamber 3, and at the same time avoiding the phenomenon of the equipment becoming wet due to the release of a large amount of water vapor during evacuation, preventing corrosion and damage of the evacuation equipment. By setting the filter mesh plate 27, impurities contained in the gas can be intercepted, preventing blockage of the evacuation pipeline.

[0025] During the evacuation process, as the gas is continuously extracted, the air pressure in the vacuum chamber 3 gradually decreases. Since the fixed cylinder 14 is in communication with the vacuum chamber 3, the air pressure in the fixed cylinder 14 will also decrease accordingly, forcing the piston block 15 to move downward, compressing the spring 16, and the movable rod 17 drives the movable electrode plate 19 to move downward. When the movable electrode plate 19 moves downward to contact the fixed electrode plate 20, the indicator light 21 is energized and lights up, and transmits the received signal to the controller 33. The controller 33 receives the information and controls the start of the second pneumatic cylinder 28, so that the second pneumatic rod drives the thermoplastic main board 29 to move downward. With the cooperation of the thermoplastic auxiliary board 31, the bag mouth of the packaging bag can be plastic-sealed. By setting the triggering mechanism, when all the gas in the packaging bag is extracted, the packaging bag can be plastic-sealed in time, ensuring that the packaging bag is plastic-sealed in time after all the gas in it is completely extracted. Timely plastic-sealing reduces the time for the evacuation device to be in a negative pressure state for a long time, which is beneficial to protecting the sealing performance and structural integrity of the equipment and extending the service life of the evacuation equipment.

[0026] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0027] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A vacuum packaging device for creep feed and nursery feed, characterized in that: Comprising a packaging table (1); a placement groove (2) and a vacuum chamber (3) are provided on the packaging table (1), a slot (4) is provided on the peripheral side of the vacuum chamber (3), a sealing frame (5) is inserted in the slot (4), fixing plates (6) are fixedly connected to both side walls of the packaging table (1), two rod holes are provided on each fixing plate (6), a limiting slide rod (7) is inserted in each rod hole, connecting plates (8) are fixedly connected to the tops of the two limiting slide rods (7) on the same side, and a sealing frame (5) is fixedly connected between the two connecting plates (8). A first pneumatic cylinder (9) is installed on the outer side wall of the packaging table (1), a first pneumatic rod (10) is assembled at the acting end of the first pneumatic cylinder (9), a connecting block (11) is fixedly connected to the top of the first pneumatic rod (10), and one side wall of the connecting block (11) is fixedly connected to the sealing frame (5). A through hole (13) is provided at the top of the sealing frame (5), a fixing cylinder (14) is fixedly connected to the port of the through hole (13), a piston block (15) is arranged in the fixing cylinder (14), a spring (16) is fixedly connected between the bottom side of the piston block (15) and the top side of the sealing frame (5), a movable rod (17) is fixedly connected to the top side of the piston block (15), a fixing block (18) is fixedly connected to the top of the movable rod (17), a movable electrode plate (19) is installed on the fixing block (18), a fixing frame (12) is fixedly connected to the top side of the sealing frame (5), a fixed electrode plate (20) is installed on the inner wall of the fixing frame (12), an indicator light (21) is installed on the top side of the fixing frame (12), and the indicator light (21), the fixed electrode plate (20) and the movable electrode plate (19) are electrically connected.

2. The vacuum packaging equipment for creep feed and nursery feed according to claim 1, wherein: An L-shaped sponge block (26) and a filter mesh plate (27) are installed at the bottom of the vacuum chamber (3), and the filter mesh plate (27) is arranged beside the L-shaped sponge block (26).

3. The vacuum packaging equipment for creep feed and nursery feed according to claim 1, characterized in that: A pump body (22) is installed on the top side of the sealing frame (5), an air suction pipe (23) is connected to the input hole of the pump body (22), and the low port of the air suction pipe (23) is communicated with the sealing frame (5). An exhaust pipe (24) is connected to the output hole of the pump body (22).

4. A vacuum packaging device for creep feed and nursery feed according to claim 1, characterized in that: A cloth bag port (25) is provided on one side of the vacuum chamber (3), and the cloth bag port (25) is communicated with the vacuum chamber (3).

5. A vacuum packaging device for creep feed and nursery feed according to claim 1, characterized in that: A second pneumatic cylinder (28) is installed on one side wall of the sealing frame (5), a second pneumatic rod is assembled at the acting end of the second pneumatic cylinder (28), a heat-sealing main board (29) is fixedly connected to the bottom end of the second pneumatic rod, a heating pipe (30) is arranged in the heat-sealing main board (29), a controller (33) is installed on the top side of the sealing frame (5), and the second pneumatic cylinder (28) is electrically connected to the indicator light (21).

6. The vacuum packaging equipment for creep feed and nursery feed according to claim 1, characterized in that: A heat-sealing auxiliary board (31) is assembled at one end of the placement groove (2), and the heat-sealing auxiliary board (31) is arranged directly below the heat-sealing main board (29). A pressing frame (32) is rotatably installed in the placement groove (2).

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