Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
  • B29C45/1816—Feeding auxiliary material, e.g. colouring material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
  • B29B7/22—Component parts, details or accessories; Auxiliary operations
  • B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
  • B29B7/248—Component parts, details or accessories; Auxiliary operations for feeding with plungers for introducing the material, e.g. from below
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/58—Component parts, details or accessories; Auxiliary operations
  • B29B7/72—Measuring, controlling or regulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/80—Component parts, details or accessories; Auxiliary operations
  • B29B7/88—Adding charges, i.e. additives
  • B29B7/90—Fillers or reinforcements, e.g. fibres
  • B29B7/905—Fillers or reinforcements, e.g. fibres with means for pretreatment of the charges or fibres
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
  • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
  • B29C45/1816—Feeding auxiliary material, e.g. colouring material
  • B29C2045/185—Feeding auxiliary material, e.g. colouring material controlling the amount of auxiliary material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
  • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
  • B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings

Definitions

• the invention relates to an apparatus and a method for producing molded parts made of plasticizable material and fibrous deposits and / or fillers on a cyclically operating injection molding machine for processing plastics and other plasticizable materials such as ceramic or powdery masses according to the preamble of claim 1 and of claim 8.
• Such a device and such a method are known from DE 42 36 662 C2 for the production of fiber-reinforced plastic parts.
• fibrous deposits for example, glass, carbon or aramid fibers via feed channels directly to the plasticizing unit and there fed to the molten, plasticized material.
• the supply takes place via an introduction opening for the fibrous inserts, which is arranged in the conveying direction downstream of the material feed area for the plasticizable material.
• a fiber feed connection is provided, so that the fibers can be sheared off via the plasticizing screw arranged in the plasticizing unit.
• a cutting or separating device that can be acted upon by the fiber strand can be provided for cutting the fiber material to length.
• the present invention has the object, such a device and a method of the type mentioned in such a way that a targeted introduction in the cycle of the injection molding machine is possible.
• the means for introducing the fibrous inserts and / or fillers is operated in a controlled manner, for which purpose a control device is provided which preferably controls the volumetric introduction of the fibrous inserts or fillers as a function of the metered amount of the plasticizable material.
• FIG. 1 shows a three-dimensional view of an injection molding unit according to the invention
• FIG. 2 shows a longitudinal section through the injection molding unit according to FIGS. 1, 3, 4 an enlarged section in the region of the introduction opening for the fibrous inserts and / or fillers with opened and closed insertion opening.
• the figures show a Spritg tellech S as part of a plastic injection molding machine or an injection molding machine for processing plastics and other plasticizable materials such as ceramic or powdery masses.
• This injection molding unit S has a conventional structure, that is to say, plasticizable material which is supplied via the material collecting container 19 to the plasticizing unit 10 via a material feed region 13 is melted in the plasticizing unit 10 and introduced into a cavity, not shown in the drawing, by means of a plasticizing screw 11 an injection mold, which is received in an associated mold clamping unit.
• a cyclical movement of the plasticizing screw 11 takes place within the plasticizing unit 10, wherein the plasticizing screw is rotated by the motor group M and moved axially.
• the plasticizable material is then injected via the nozzle 20 into the cavity.
• Fibrous inserts 12 and / or fillers are added to the plastics and other plasticizable materials such as ceramic or powdery masses.
• the supplied material is processed in the plasticizing unit 10, ie melted and metered.
• At least one introduction opening 14 for the fibrous inserts 12 and / or fillers is provided in the conveying direction of the plasticizing screw 11 after the material feed region 13 on the plasticizing unit 10.
• at least one cutting or separating device 17 arranged for cutting the fiber strand to form the fibrous inserts 12 is provided, especially when processing fibrous inserts, in front of or in the introduction opening 14, which can be acted upon by at least one fiber strand 15.
• a device 18 operating in the cycle of the injection molding machine for introducing the fibrous inserts 12 and / or fillers into the plasticizing material in the plasticizing unit 10 is provided in the region of the introduction opening 14, wherein the introduction opening 14 can be closed so that the introduction can be done during dosing.
• the cutting to length of a fiber strand 15 can take place before introduction into the melt of the meltable, plasticizable material and the pressing is controlled or regulated with the plasticizing screw 11 stationary.
• the amount of fibrous insert 12 can be regulated and programmed by means of a control device C. or filler or their volume depending on the amount of plasticized material are added.
• the amount of fibrous deposits can also be detected, for example, by way of a travel measurement of the fiber strand supplied.
• the introduction of long glass fibers is realized as a filler.
• Alternative fillers or alternatively alternative fibers are also usable.
• the device has an unwinding device 16 for the fiber strand 15, and a device 18 for introducing the fibrous inserts 12 and / or fillers.
• This device is formed in the exemplary embodiment by a piston-cylinder unit, which can be clearly seen in FIGS. 3 and 4 in particular.
• the device 18 for introducing the fibrous inserts and / or fillers can at the same time be the cutting or separating device 17.
• the length of the fiber in conjunction with the length of the supplied fiber strand can be determined via a cutting edge of the punch 18a.
• the cutting off of the fibers takes place via the cutting edge of the device 18 for introducing the fibrous inserts 12 or fillers, so that a quantitatively controllable insertion of the cut fibers by a parameter dependence of Schneckenendosierweg or volume is possible.
• the amount is simultaneously dependent on the stroke-dependent method of the punch of the piston-cylinder unit.
• a control device C is connected to the injection molding unit S and its parts via various signal lines. Controlled and programmable, the device 18 for introducing the fibrous inserts 12 and / or the separating and cutting device 17 can be actuated via the control device C. This allows a controlled and programmable supply of fibrous inserts and fillers.
• the plastifiable material is supplied via a material feed region 13 of the plasticizing unit 10 provided with the plasticizing screw 11 for plastifying and metering the plasticizable material.
• Fiber-shaped deposits are supplied via a material feed region 13 of the plasticizing unit 10 provided with the plasticizing screw 11 for plastifying and metering the plasticizable material.
• the introduction opening is located directly on the plasticizing unit 10, so that the fibrous inserts 12 and / or fillers are introduced through the introduction opening 14 in the cycle of the injection molding machine during dosing into the molten plasticizable material.
• the fibrous inserts 12 may be cut to length from the same device and introduced into the plasticizing unit 10, such as e.g. shown in Figures 3 and 4 by the punch 18 a and the associated piston-cylinder unit as means 18.
• the fibrous inserts 12 and / or fillers can be controlled and programmed by a control device C, in particular with regard to the length and amount of the fibrous inserts and fillers.
• the introduction is preferably volume-dependent as a function of the metered amount of the plasticizable material.
• the introduction opening 14 is closed by the means 18 for introducing the fibrous inserts 12, if necessary. However, the introduction opening can also be closed by other means, which are preferably likewise operated in a regulated manner by the control device C.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41718535

Family Applications (1)

Country Status (5)

Families Citing this family (12)

Family Cites Families (19)

• 2008
  • 2008-12-10 DE DE102008061270A patent/DE102008061270B4/de active Active
• 2009
  • 2009-12-08 JP JP2011539942A patent/JP2012511445A/ja active Pending
  • 2009-12-08 US US13/132,696 patent/US20110272847A1/en not_active Abandoned
  • 2009-12-08 EP EP09799523A patent/EP2373472A1/de not_active Withdrawn
  • 2009-12-08 WO PCT/EP2009/008732 patent/WO2010075936A1/de active Application Filing

Non-Patent Citations (1)

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