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
  • B29C45/20—Injection nozzles
• • 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
  • B29C45/26—Moulds
  • B29C45/27—Sprue channels ; Runner channels or runner nozzles
• • 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
• • 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
  • B29C45/26—Moulds
  • B29C45/27—Sprue channels ; Runner channels or runner nozzles
  • B29C2045/2772—Means for fixing the nozzle to the manifold

Definitions

• Injection molding nozzle in particular hot runner nozzle, for arrangement in one
• the invention relates to an injection molding nozzle, in particular hot runner nozzle, for arrangement in an injection mold, which has a larger number of plates depending on the configuration and at least one back and tool clamping plate and a distributor plate on its fixed tool side and at least one cavity plate on its separable mold side has, at the mold cavity a nozzle tip is used, wherein the injection nozzle has at its remote from the nozzle tip, a rear end provided with a housing collar, hollow body-shaped flange housing which receives a material tube with an opening in the nozzle tip flow channel for a molten material, and with Connections for heating and / or cooling and temperature sensor is provided.
• such an injection molding nozzle designed as a hot runner nozzle with an integrated electric heating element, and a central bore as a flow channel for conveying the thermoplastic melt to the nozzle tip and then into the cavity of a cooled mold or a separable tool block with the therein in a cavity plate provided mold nest become known.
• the cavity plate can be provided with a plurality of mold cavities and the injection mold with a corresponding plurality of injection molding nozzles and these possibly also with a plurality, for example arranged at an angle, nozzle tips.
• the hot runner nozzle comprises an elongate central body which is provided in a one-piece outer sleeve or one with a flange part as a housing collar Flange housing is seated.
• the central body has at its extended central shaft portion at its rear end to another flange or housing collar, which is clover-shaped and engages positively in the corresponding contoured housing collar or flange of the outer sleeve and the flange housing.
• the thus built by plugging injection molding nozzle is attached to the rear flange or housing collar in a seat in a plate on the hot tool side and screwed.
• This is a multi-part and has an outer sleeve with an upper collar for installation when installed in a mold cavity.
• the material pipe with the flow nozzle opening into the nozzle flow channel is formed at its rear end with a shoulder-like outer collar, via which the material pipe is connected to the flange body or tubular body flange by welding at the junction of the mutually laying end faces.
• a patch over the expansive shoulder piece of the jacket tube cap forms the rear end of this hot runner nozzle.
• the nozzle body has at least one substantially flat side surface on the a flat heating and / or cooling device is mounted.
• the invention has for its object to provide a generic injection molding nozzle, in particular hot runner nozzle, which has a simple structure and allows easy assembly or disassembly into or out of the mold.
• the jacket tube is connected at its rear end over a limited length portion of its outer circumferential surface integrally with the flange housing on the inner circumferential surface. It thus need the material pipe and the flange no longer be plugged into each other or be added, but is in the installation and removal of a solid compact unit.
• the compact design is further facilitated by the invention that the material tube from its nozzle-side, front end to the front end with the flange end, rear end is formed continuously without offset.
• the dimension of the compact nozzle unit with the uniformly continuous material pipe thus determined solely by the requirements to be complied with outer diameters of the material tube and this with compression at the rear end concentrically enclosing the flange housing.
• without loss is meant here that for the pressing sen of the material pipe in the flange housing in the seating area over the length of a tighter tolerance than in the remaining area of the material tube adhered and a minimum (a few 1/10 mm) stop is provided, which ensures a defined Einpresstiefe the material tube in the flange housing. This is also true for the front sealing area of the material pipe.
• the invention proposes alternatively, these components over the limited, certain length to be soldered together or welded together, the latter of the flush-fitting end faces of the circumferential butt joint between Material tube and flange housing.
• An embodiment of the invention provides to improve the temperature control that the flange housing is made of titanium.
• Fig. 1 in a partial cross section of an installed in an injection mold
• Injection molding nozzle shown schematically; and Fig. 2 as a detail in a longitudinal section of a hot runner nozzle led injection molding.
• An injection molding tool 1 shown in FIG. 1 comprises a plurality of plates on its fixed tool side I and on its one separable tool block with a cavity plate 2 with a mold side II having incorporated therein a mold cavity 3.
• a back plate or tool clamping plate 4 On the fixed tool side I, a back plate or tool clamping plate 4, a distributor plate 5 with Strö- not shown mungskanälen and a frame or intermediate plate 6 shown.
• This has a flow in a nozzle tip 8 flow channel 9 for in the injection molding according to arrow 10 from the distributor plate 5 fed molten metal, which flows out of the nozzle tip 8 into the mold cavity 3 of the cavity plate 2.
• the injection molding or hot runner nozzle 7 is inserted with a housing collar 11 in a forward, in the injection direction 10 open recess 12 of the intermediate plate 6.
• the recess 12 merges into a through hole 13, through which the rear housing end 14 of the hot runner nozzle 7 projects with connection to the distributor plate 5.
• the rear housing end 14 is formed with a seal in the form of a circumferential sealing bead 15, which fits snugly into the through hole 13 of the recess 12 of the intermediate plate 6.
• With lateral supply plug connections for a heater 16 and temperature sensor 17 are provided.
• hot runner nozzle 7 comprises a provided with the housing collar 11, hollow body-shaped flange housing 18 and a contrast slimmer or smaller in diameter, adjoining forward, bolted to the flange housing 18 in the region of the housing collar 11 shaft 19.
• Das Flange housing 18 and the shaft 19 concentrically surround a material tube 20, which is formed with the opening into the nozzle tip 8 flow channel 9.
• a construction without such a shaft 19 is possible, for which then the lower end of the material tube 20 itself would sit directly sealed in the tool.
• the material pipe 20 is continuously formed without offset from its nozzle-side, front end to the end flush with the flange housing 18, rear end and connected at this rear end over a limited length portion 21 by a press-fit 22 with the flange housing 18 in one piece. This is done by pressing in the outer sheath surface of the material tube 22 and pressing with the applied over the limited length portion 21 inner lateral surface of the housing bore of the flange housing 18 is reached.
• the hot runner nozzle can thus be mounted in a simple manner as a whole unit.

Landscapes

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

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38283176

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (4)

Citations (7)

Family Cites Families (11)

• 2006
  • 2006-06-08 DE DE102006026580A patent/DE102006026580A1/de not_active Withdrawn
• 2007
  • 2007-05-23 US US12/303,556 patent/US8007271B2/en not_active Expired - Fee Related
  • 2007-05-23 PL PL07725447T patent/PL2026946T3/pl unknown
  • 2007-05-23 JP JP2009513567A patent/JP2009539641A/ja active Pending
  • 2007-05-23 CN CN200780021173XA patent/CN101466519B/zh not_active Expired - Fee Related
  • 2007-05-23 CA CA2654497A patent/CA2654497C/en not_active Expired - Fee Related
  • 2007-05-23 EP EP07725447.2A patent/EP2026946B1/de not_active Not-in-force
  • 2007-05-23 KR KR1020087029827A patent/KR101453817B1/ko not_active Expired - Fee Related
  • 2007-05-23 WO PCT/EP2007/004547 patent/WO2007140878A1/de not_active Ceased

Patent Citations (7)

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