Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
  • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
  • B65B1/06—Methods of, or means for, filling the material into the containers or receptacles by gravity flow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
  • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
  • B65B1/32—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by weighing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B25/00—Packaging other articles presenting special problems
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B29/00—Packaging of materials presenting special problems
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
  • B65B39/007—Guides or funnels for introducing articles into containers or wrappers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
  • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
  • B65B43/54—Means for supporting containers or receptacles during the filling operation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B57/00—Automatic control, checking, warning, or safety devices
  • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged

Definitions

• the invention relates to the packaging of polysilicon.
• Polycrystalline silicon or polysilicon in short can be deposited by means of the Siemens method of chlorosilanes in rod form. Subsequently, the
• rod-shaped polysilicon usually broken as free of contamination to fragments or broken polysilicon.
• Polysilicon breakage is a sharp-edged, non-free-flowing bulk material.
• mixtures of different chemicals and / or acids are used, in particular to remove adhering foreign atoms from the surface again.
• EP 0 905 796 B1 claims a process for producing silicon which has a low metal concentration, characterized in that the silicon is washed in a preliminary purification in at least one stage with an oxidizing cleaning solution which comprises the compounds hydrofluoric acid (HF),
• HNO3 nitric acid
• HF hydrofluoric acid
• the purified polysilicon fraction is usually packed in plastic bags.
• the device comprises a polysilicon breakthrough chute, a polysilicon chute weighing device connected to a hopper, silicon baffles, a filling device which forms a plastic bag from a high purity plastic film (e.g., PE), and a
• Welding device for the polysilicon-filled plastic bag By the reinforcement of built-in parts of the device with silicon or with a
• US 2010/0154357 A1 discloses a device for packaging of
• Polysilicon fracture consisting of a Rund meetingr-, filling and closing machine or a non-circular device arranged with a filling station and a closure station in which a PE bag is suspended on a gripper system is moved from station to station in a clock sequence, characterized in that the filling station comprises a freely suspended energy absorber made of a nonmetallic low-contamination material which is introduced into the PE bag before filling the PE bag with polycrystalline silicon and, after filling the PE bag with polycrystalline silicon, is removed from the PE bag and the filled PE bag is conveyed by means of the gripper system in the closure station and is closed there.
• the polysilicon is first weighed, in a
• nonmetallic low-contamination material in a freely suspended introduced high purity plastic bag and then the plastic bag is sealed.
• the bag is opened.
• a conveyor which is covered with silicon or a low-contamination material and with a movable flexible hose from a
• non-metallic material eg. As plastic
• US 2012/0198793 A1 discloses a method for dosing and packaging polysilicon fragments, wherein a product stream of polysilicon fragments transported via a conveyor, separated by means of at least one sieve into coarse and fine fragments, weighed by means of a metering balance and metered to a target weight, via a discharge chute is discharged and transported to a packaging unit, where the polysilicon fragments are filled into a first plastic bag and this is sealed, this plastic bag containing polysilicon fragments is packed in another molded by a former plastic bag, which is then welded, said at least one screen and the metering scale on their surfaces at least partially comprise a hard metal and the former for forming the plastic bag has a wear-resistant coating.
• US 2013/0042582 A1 discloses a method for packaging polycrystalline silicon, in which polycrystalline silicon is filled by means of a filling device into a plastic bag, characterized in that a storage container has an opening through which silicon is filled, wherein the plastic bag after filling the Reservoir is pulled with silicon over the reservoir and the reservoir is then rotated so that the silicon from the reservoir into the plastic bag slips.
• fines all fragments or particles of silicon having such a size as to be cut off by a mesh screen with 8 mm x 8 mm square mesh will be referred to as fines.
• the fines are undesirable for the customer as they have a negative impact on customer processes. If the fines from the customer e.g. has to be separated by sieving, this means an increased effort.
• US 2014/0130455 A1 discloses a method for packaging polycrystalline silicon which is in the form of fragments comprising the following steps
• Fines are separated by sieves, in one below the dosing system
• a drop height of the polycrystalline Siliciums of dosing in plastic bag by means of at least one clamping device is kept less than 450 mm.
• the drop height of the polycrystalline silicon from a conveyor trough of the metering system into the plastic bag should be less than 450 mm, preferably a maximum of 300 mm. This reduces the fines content.
• the fine fraction can be reduced even more clearly, for the crack size 20-60 mm from 17000 ppmw to 1400 ppmw.
• the object of the invention was to automatically pack polycrystalline silicon and reduce the resulting fines to an extremely low level.
• the task was also to provide a device suitable for this purpose.
• the object of the invention is achieved by a method for packaging polysilicon comprising providing polysilicon in the form of fragments of comminuted polysilicon rods produced by depositing polysilicon in rod form in a reactor, purifying the polysilicon, packaging the polysilicon, wherein the polysilicon during cleaning in one
• Process bowl is located and wherein the polysilicon from the process bowl is packaged in a plastic bag, that process bowl and plastic bag are attached to a filling unit, which is set in rotation, so that the
• the plastic bag is preferably a prefabricated
• Double bag Unlike in the prior art, the polysilicon is thus not packed in a first plastic bag, which then in a second
• Plastic bag is inserted.
• the polysilicon is preferably filled directly into a double bag.
• the double bag is attached to the packaging system, preferably clamped.
• the plastic bag is in a former
• the former is a socket in which the molded plastic bag is located.
• Shaper ensures that the plastic bag retains its shape during the rotational movement of the system.
• the polysilicon to be cleaned and packaged is initially in a process bowl.
• the polysilicon is purified in the process dish as described in US 2010/0154357 A1.
• Process bowl can be carried out, for example, as described in EP 0 905 796 B1.
• the filling of the plastic bag with polysilicon does not take place via a conveyor such as a conveyor trough or a chute, but directly from the process bowl.
• a conveyor such as a conveyor trough or a chute
• the process bowl is emptied into the bag or double bag via a rotary movement of process bowl and bag / double bag.
• the polysilicon Due to the rotational movement of the process bowl and double bag, the polysilicon is placed in a roll / slip state and thus slides into the
• each empty process bowl is checked for its absolute emptying with weighing and / or camera system and released.
• the packaging system comprises at least one filling unit. In the simplest case, this is a kind of funnel. Via the filling unit, the polysilicon slides from the process bowl into the
• the filling unit is made of silicon.
• a process bowl containing polysilicon is attached to the one opening of the filling unit.
• a former with a PE double bag located therein is clamped or jammed.
• the process bowl consists of a chemical
• the bag and process tray can be loaded manually or automatically depending on throughput requirements.
• the packaging system comprises a base frame and a rotatable frame.
• the filling unit On the rotatable frame, the filling unit is attached. It drives a drive shaft, which sets the rotatable frame in rotation. Meanwhile, the emptying of the process bowl and thus the filling of the bag takes place. Depending on the size of the break, the rotational movement can be adjusted depending on the tilt angle.
• the tilt angle in the context of the invention is the angle from which the polysilicon starts to slide out of the process bowl via the filling unit into the bag.
• the system can be executed with one or more filling units.
• the plant 2 comprises filling units.
• Compared to the task of the process bowls is preferably the removal of the filled bags and at the same time plugging and clamping the new empty bag.
• a former receptacle which serves to secure a former with a plastic bag.
• the plastic bag is slipped with its opening over one end of the filling unit.
• the process bowl is fixed with the polysilicon to be packaged.
• the base frame of the system in one embodiment includes feet and side mounting brackets.
• Feet and Shaper recording can each be provided with a cover.
• covers and the lateral mounting brackets can be made of polysilicon low-contamination material.
• they include liners of plastics (e.g., PU) or silicon.
• the rotating movement of the system is accomplished by a lift motor which drives a drive shaft and with a
• Toothed belt drive is connected to toothed belt pulleys.
• FIG. 1 shows schematically different time states of the packaging installation according to the invention.
• Polysilicon is, the filling unit 2, where the process bowl 1 and the
• Plastic bag 3 are attached.
• the plastic bag 3 is located in the former 4.
• the former 4 serves as a shaped body for the plastic bag 3.
• the former 4 is clamped to the filling unit 2 or to a receptacle intended for this purpose for the former, thus also ensures the fixation of the plastic bag.
• the axis of rotation is located.
• the polysilicon begins to slip or slide from the former 4 via the filling unit 2 into the plastic bag 3.
• the rotational speed of the equipment should be reduced to ensure a sliding movement of the polysilicon during the entire filling process (e.g., time t3).
• the entire polysilicon is in the plastic bag 3.
• the rotation of the system can then be terminated.
• the filled plastic bag 3 is removed and, for example, welded, packed in a box and shipped.
• the polysilicon is inserted into the process bowl.
• the loaded weight in the process bowls is e.g. 5 kg plus a small surcharge for the etching removal, which depends on the size of the fragments.
• the target weight is in the
• the process trays are then transported to the packaging.
• the double bag is filled by placing the chute with the polysilicon and allowing the polysilicon to slip into the bags. By emptying the process bowls onto the chute and sliding towards the bag, the polysilicon is reground. Thus, fines are generated.
• Example 1 The process trays are at the filling unit of an inventive
• the double bag is filled by rotating the process tray and the double bag in a rotary motion, causing the polysilicon to slide into the bag.
• the resulting fines decreased by more than 50% compared to the

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Quality & Reliability (AREA)
• Silicon Compounds (AREA)
• Basic Packing Technique (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56087247

Family Applications (1)

Country Status (9)

Families Citing this family (2)

Family Cites Families (23)

• 2015
  • 2015-05-26 DE DE102015209629.7A patent/DE102015209629A1/de not_active Withdrawn
• 2016
  • 2016-05-03 TW TW105113694A patent/TWI619646B/zh active
  • 2016-05-20 MY MYPI2017001307A patent/MY191009A/en unknown
  • 2016-05-20 WO PCT/EP2016/061406 patent/WO2016188893A1/de active Application Filing
  • 2016-05-20 JP JP2017557172A patent/JP6567689B2/ja active Active
  • 2016-05-20 KR KR1020177031005A patent/KR102055207B1/ko active IP Right Grant
  • 2016-05-20 EP EP16725815.1A patent/EP3303141A1/de not_active Withdrawn
  • 2016-05-20 CN CN201680021564.0A patent/CN107454884B/zh active Active
  • 2016-05-20 US US15/576,530 patent/US10689135B2/en active Active

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