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EP-3781733-B1 - METHOD FOR OPERATING A FEED INSTALLATION, AND FEED INSTALLATION OPERATED USING SAID METHOD

EP3781733B1EP 3781733 B1EP3781733 B1EP 3781733B1EP-3781733-B1

Inventors

  • WACKERZAPP, Frank
  • TAMMEN, EIKE
  • MARX, MAXIMILIAN

Dates

Publication Date
20260513
Application Date
20190329

Claims (8)

  1. Method • for operating a feeding system (1) with - a receiving device (30) to be fed and - at least one feeding device (2, 10), designed to weigh out, in cycles, a predetermined quantity of fibre material, also referred to as the associated quantity of fibre material, · and · to deliver it to the receiving device (30) after weighing, and • comprising a cycle (Z) with - a first step (S10) of weighing the associated quantity of fibre material in the respective one of the at least one feeding device (2, 10), and - when the first step (S10) has been completed, a second step of checking whether each respective one of the at least one feeding device (2, 10) is capable of having weighed and delivered the corresponding amount of fibre material to the receiving device (30) when the current cycle time has elapsed, and - if the second step shows that each of the at least one feeding device (2, 10) is able to weigh and deliver the corresponding amount of fibre material accordingly, a third step (S20) of delivering the corresponding amount of fibre material to the receiving device (30), and - if the second step results in at least one of the at least one feeding device (2, 10) being unable to weigh and deliver the corresponding amount of fibre material accordingly, a fourth step (S40) of increasing a working speed of this at least one feeding device (2, 10) by a predetermined amount, - characterised in that the step (S10) of weighing the at least one feeding device (2, 10) includes · a rapid filling phase (S12) comprising simultaneously · transporting fibre material into a container (21) of the respective feeding device (2, 10) at a first filling speed, and · weighing the fibre material received in the container (21), · upon reaching a predetermined pre-fill fibre material quantity in the container that is less than the associated fibre material quantity, a slow filling phase (S24) comprising continuing to transport the fibre material into the container (21) at a second filling speed that is lower than the first filling speed, and upon reaching the predetermined amount of fibre material, a stabilisation phase with respect to the container (21).
  2. Method according to claim1 , wherein the step (S40) of increasing the working speed comprises shortening the time for weighing.
  3. Method according to one of claims 1 or 2, comprising a braking phase which • which is performed between the fast filling phase (S12) and the slow filling phase (S24), and • in which the filling speed is reduced from the first to the second filling speed according to a predetermined progression.
  4. Method according to claim 2, wherein the shortening of the weighing time is achieved by varying the duration of at least one of the weighing phases.
  5. Method according to one of the preceding claims, further comprising a sixth step (S43) • performed when - the second step results in at least one of the at least one feeding device (2, 10) being unable to have weighed and delivered the corresponding amount of fibre material, and - the at least one feeding device (2, 10) is operating at maximum working speed, and • comprising - signalling this state of the at least one feeding device (2, 10) externally in relation to the at least one feeding device (2, 10) and/or - a first sub-process comprising · transmitting (S43) a necessary remaining time for completing the weighing for the at least one feeding device (2, 10) to a device (31) controlling the receiving device (30), and · changing the current cycle time in the receiving device (30) based on a maximum of the transmitted at least one remaining time.
  6. Method according to one of the preceding claims, wherein the cycle (Z) is repeated continuously.
  7. Feeding system (1), constructed and designed to be operated according to a method of the preceding claims, wherein • the receiving device (30) comprises a transport section (33) designed to move received fibre material in a predetermined direction of movement (R), • the at least one feeding device (2, 10) is designed to weigh a predetermined amount of fibre material - and - after weighing, to drop or deposit it onto the transport section (33), • at least one of the at least one feeding device (2, 10) - has a weighing container (21) which ∘ forms the respective container (21), ∘ has a filling barrier formed on a side facing away from the transport section (33), designed ◊ in an activated state, to close a filling opening (23) of the weighing container (21) so that fibrous material is prevented from entering the weighing container (21), and ◊ in a deactivated state, opens the filling opening (23), ∘ has a discharge section formed on a side facing the transport section (33), designed ◊ in a deactivated state, closing a discharge opening (22) of the weighing container (21) so that fibre material located in the weighing container (21) is prevented from falling out of the weighing container (21), and ◊ in an activated state, to open the discharge opening (22) of the weighing container (21), and ∘ the arrangement is such that fibre material located in the weighing container falls onto the transport section (33) when the discharge opening (22) is open, and · has a weighing device (20) designed to determine the current weight of the fibre material contained in the weighing container (21), and • the feeding system (1) is designed - to determine the time for a cycle (Z) - on the basis of the determined cycle time and the current movement speed of the transport section (33) and/or the current braking distance of the transport section (33), to determine whether the feeding device (2, 10) is capable of weighing the corresponding amount of fibre material when the transport section (33) has travelled the predetermined drop path (a).
  8. Feeding system (1) according to claim 7, • comprising a plurality of feeding devices (2, 10) arranged one behind the other in the direction of movement (R) of the transport section (33), • wherein each pair of immediately adjacent feeding devices (2, 10) has a minimum distance (a) between them, which corresponds to the drop path (a) with respect to the feeding device (2, 10) directly upstream in the transport direction (R).

Description

The invention relates to a method for operating a food supply system and to a food supply system operated by means of such a method. A spinning mill comprises a multitude of individual spinning machines arranged in a production chain. One or more spinning machines supply the material for one or more downstream spinning machines. For example, a bale opener delivers fiber material to a cleaner, such as a foreign matter separator. The foreign matter separator delivers the (pre-)cleaned fibers to a mixer. The mixer delivers the mixed fibers to a fine cleaner. The fine cleaner delivers the finely cleaned fibers to several cards. The cards deliver fiber slivers to a comparatively smaller number of drawing machines. The drawing machines deliver drawn fiber slivers to, for example, a comparatively smaller number of spoolers. The spoolers deliver reels to a comparatively larger number of combing machines. The combing machines deliver combed and drawn fiber slivers to a comparatively smaller number of drawing machines. These drawing machines, in turn, deliver drawn fiber slivers to, for example, a flyer. The flyer, in turn, delivers roving to a spinning machine. The main problem is to provide each spinning machine with enough material to process so that the entire plant can operate as efficiently and without interruption as possible. The US 2 983 325 A Disclosing a method in which, at periodic intervals during cyclical operation, a feeding device discharges measured quantities of fibrous material onto a feed conveyor. A mechanism automatically accelerates if the weighing box is filled too slowly. A time-delay mechanism is incorporated that automatically accelerates a needle belt via a variable-speed motor drive if the belt has not supplied the weighing box with the desired amount of fiber within a predetermined time period. The timer starts automatically when a weighing box filling cycle begins. Once the weighing box is full, the timer stops. If the weighing box does not fill within a selected time period, the motor drive is accelerated to speed up the needle belt and thus ensure proper filling of the weighing box before the periodic emptying occurs. From the US 2 995 783 A Another machine is known that switches to high-speed operation shortly before the end of a predetermined time interval in order to fill the weighing pan with a predetermined amount of fiber material. From the DE 10 3005 040 399 A1 A flake feeding system is known in which a spinning master can input the production. A disadvantage is that the flake feeding system may be unable to feed the mixing belt in a timely manner when running continuously. This is primarily due to the fact that the air-fiber flow to each feeding machine is not as continuous as desired, meaning it doesn't always deliver the required number of flakes per unit of time. In this case, the mixing belt must be stopped until all feeding machines in the flake feeding system are filled. Furthermore, the production setting at each feeding machine is done manually, so there is no synchronization with the mixing belt. This leads to an undesired stop-and-go operation of the mixing belt, resulting in higher energy consumption for the entire system due to the frequent acceleration and deceleration of the mixing belt, and thus higher costs. Moreover, this reduces This affects the production rate of the entire plant, leading to production delays. This also puts a strain on the mechanics of the mixing belt system. The purpose of the invention is to address the aforementioned disadvantages. This problem is solved by the subject matter of claims 1 and 7. Beneficial further training opportunities are listed in the sub-requirements. According to the invention, a method for operating a feeding system is provided. The feeding system is equipped with a receiving device and at least one feeding device. The feeding device is designed in a known manner to cyclically weigh out a predetermined quantity of fiber material and deliver it to the receiving device after weighing. The method comprises one cycle. During each cycle, in a first step, the quantity of fiber material corresponding to the respective feeding device is weighed in that device. After a certain time period has elapsed, the cycle includes a second step of checking whether each feeding device is able to have weighed out the corresponding quantity of fiber material and delivered it to the receiving device when the current cycle time has expired. With multiple feeding devices, their discharge times may differ, for example, due to varying quantities of fiber material to be weighed, so the check takes the "slowest" feeding device into account. Otherwise, the entire process could stall, which could lead to the aforementioned stop-and-go operation. If the check shows that If the test shows that each feeding device is capable of weighing and delivering the corresponding quantity of fiber material, the cycle includes a third step: delivering the corr