WO1995002494A1 - Bloc pourvu de canaux froids utilise pour le traitement d'elastomeres - Google Patents

Bloc pourvu de canaux froids utilise pour le traitement d'elastomeres Download PDF

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Publication number
WO1995002494A1
WO1995002494A1 PCT/IB1994/000212 IB9400212W WO9502494A1 WO 1995002494 A1 WO1995002494 A1 WO 1995002494A1 IB 9400212 W IB9400212 W IB 9400212W WO 9502494 A1 WO9502494 A1 WO 9502494A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
cold runner
sprue
cooling jacket
cold
Prior art date
Application number
PCT/IB1994/000212
Other languages
German (de)
English (en)
Other versions
WO1995002494B1 (fr
Inventor
Wilfried Holzmann
Original Assignee
Stefan Pfaff Werkzeug- Und Formenbau Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stefan Pfaff Werkzeug- Und Formenbau Gmbh & Co. Kg filed Critical Stefan Pfaff Werkzeug- Und Formenbau Gmbh & Co. Kg
Publication of WO1995002494A1 publication Critical patent/WO1995002494A1/fr
Publication of WO1995002494B1 publication Critical patent/WO1995002494B1/fr

Links

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
    • B29C45/26—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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds
    • 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
    • B29C45/2737—Heating or cooling means therefor
    • 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
    • B29C45/2756—Cold runner channels
    • 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
    • B29C45/2725—Manifolds
    • B29C2045/2733—Inserts, plugs, bushings
    • 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
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/006—Thermosetting elastomers
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins

Definitions

  • the invention relates to a cold runner block for the
  • Cold runner blocks of this type are used for the injection molding of elastomeric mixtures, the tempered rubber mixture being injected into a mold under high pressure via a series of nozzle bodies arranged in parallel on a cold runner block.
  • the nozzle body had been attached to the cold runner beam of the cold runner block by means of plug-in connections.
  • the nozzle body had a sleeve-shaped attachment, which was inserted into an assigned, divided bore in the cold runner block.
  • ERSA ⁇ ZBL ⁇ T (RULE 26)
  • the disadvantage of this known connector was the risk of a leak.
  • the corresponding thrust forces which act on the nozzle body when the rubber mixture is injected through the sprue channel through the nozzle body there were strong shear loads in the area of the attachment of the nozzle body in the cold runner block, as a result of which the described plug connection was subjected to high loads and became leaky.
  • spray compound was lost and there was a thermal imbalance when injecting into the injection mold.
  • the invention is therefore based on the object of further developing a cold runner block of the type mentioned at the outset in such a way that the nozzle bodies can be easily replaced on the cold runner without the risk of leaks occurring.
  • the invention is characterized by the technical teaching of claim 1.
  • An essential feature of the invention is that the sprue nozzle assigned to the nozzle body has a threaded attachment which is screwed into an assigned threaded bore in the region of the nozzle channel of the cold runner beam.
  • This screw connection has the essential advantage that the parts that are assigned to one another and are to be sealed against one another (namely the sprue channel in the cold runner beam and the sprue nozzle) are connected to one another by a screw connection.
  • the thermal behavior of the nozzle body is also adversely affected by the use of a clamping plate according to the prior art, because this clamping plate has its own thermal capacity and the entire nozzle body is therefore difficult to cool.
  • cooling jacket is attached to the sprue nozzle in an easily detachable manner.
  • connections can be considered here as an easily detachable connection.
  • transverse bores are arranged in the cooling jacket, into which grub screws engage, which engage with their bolt-side end in an associated annular groove on the outer circumference of the sprue nozzle.
  • the cooling jacket is attached to the sprue nozzle with a corresponding screw connection.
  • the cooling jacket has a corresponding internal thread which engages in an assigned external thread of the sprue nozzle.
  • crimp connections can also be used for the connection between the cooling channel and the sprue nozzle.
  • Such a crimp connection in turn presupposes a clamping plate, which tightly seals the cooling jacket against the underside of the cold runner beam.
  • This insulating body consists of a thermally insulating material and lies against the sprue hole of the tool mold and brings about the thermal separation between the sliding nozzle and the tool mold.
  • the insulating body could also be omitted in the event that, instead of being injected into a mold, it is first injected into a sub-distributor, which in turn is then injected into the
  • FIG. 1 bottom view of a cold runner block in the direction of arrow I in FIG. 2,
  • Figure 2 Section along the line II-II in Figure 1,
  • Figure 3 Section along the line III-III in Figure 1.
  • the cold runner block essentially consists of a cold runner beam 1, which consists of a high-alloy tool steel.
  • the cold runner bar has a vertical Gußkanal on, which opens into an approximately central, extending over the entire length of the cold runner beam 1, runner 6.
  • the sprue channel 6 is closed at the end by corresponding deflection plugs 25.
  • the deflection plug 25 is designed as a plug-in insert, which is secured against axial displacement in the sprue by a threaded plug 27, which in turn is screwed into an associated threaded hole in the cold runner beam 1.
  • Deflection plug is also provided a locking screw 26 which is screwed into an associated threaded hole in the cold runner beam 1 and which is supported with its bolt-side end on the deflection plug 25.
  • At least one cooling connection piece 4 which opens into assigned cooling channels 5 in the cold runner bar 1.
  • the cooling water outlet takes place via a further cooling connection piece 3.
  • the cooling channels 5 in the cold runner bar are arranged in two levels (see FIG. 3).
  • Each nozzle body 8 consists of an inner one Sprue nozzle 15, which has an upper threaded shoulder 17 with which it is screwed into an associated threaded bore 18 in the region of the nozzle channel 7.
  • an O-ring 16 is arranged on a radial groove on the outer circumference of the sprue nozzle, said O-ring 16 being sealingly supported on the underside of the cold runner beam 1.
  • the sprue nozzle 15 is surrounded by a cooling jacket 9 on the outer circumference.
  • the cooling jacket 9 is held here easily replaceable on the sprue nozzle 15.
  • it has radial threaded bores 12 distributed around the circumference, in each of which a grub screw 13 is seated, which is supported with its bolt-side end in the region of an assigned annular groove on the outer circumference of the sprue nozzle 15.
  • cooling jacket 9 is sealed on its upper end face with an O-ring 10 on the underside of the cold runner beam 1 and on the front side (front end face) there is again a radial annular groove on the sprue nozzle 15, in which an O-ring 14 sits, which is supported on the associated end face on the front side of the cooling jacket 9.
  • the cooling jacket 9 forms large-calibrated ones which extend closely to the front of the nozzle body - 9 -
  • cooling channels 5 in the cold channel bar 05 have a flow opening directly to the cooling channels 11 arranged in the cooling jacket 9.
  • a sliding nozzle 21 is arranged on the front of the sprue nozzle 15 and can be displaced in the longitudinal direction
  • the inner bore of the sprue nozzle has a radially inwardly directed shoulder 22, which is located on an associated, radially outwardly directed shoulder of the sliding nozzle
  • an insulating body 23 is interchangeably attached to it.
  • the spray compound is then injected 20 into the associated tool shape via the nozzle openings 24 of the sprue nozzle 15.

Landscapes

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

Abstract

L'invention concerne un bloc pourvu de canaux froids utilisé pour le traitement d'élastomères, par lequel l'élastomère tempéré est injecté sous haute pression dans un moule par l'intermédiaire d'une rangée de corps de filière (8) parallèles, remplaçables, maintenus par des éléments de serrage. Dans la zone des canaux de filière (7), une batterie de canaux froids (1) comporte des alésages filetés (18). Les corps de filière (8) qui consistent chacun en une filière d'injection (15) et en une enveloppe de refroidissement (9), présentent une partie filetée saillante (17) correspondante par l'intermédiaire de laquelle ils sont vissés dans les canaux de filière (7).
PCT/IB1994/000212 1993-07-15 1994-07-13 Bloc pourvu de canaux froids utilise pour le traitement d'elastomeres WO1995002494A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9310529U DE9310529U1 (de) 1993-07-15 1993-07-15 Kaltkanalblock für die Verarbeitung von Elastomeren
DEG9310529.0U 1993-07-15

Publications (2)

Publication Number Publication Date
WO1995002494A1 true WO1995002494A1 (fr) 1995-01-26
WO1995002494B1 WO1995002494B1 (fr) 1995-02-23

Family

ID=6895592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1994/000212 WO1995002494A1 (fr) 1993-07-15 1994-07-13 Bloc pourvu de canaux froids utilise pour le traitement d'elastomeres

Country Status (2)

Country Link
DE (1) DE9310529U1 (fr)
WO (1) WO1995002494A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1074367A2 (fr) * 1999-08-03 2001-02-07 Kabushiki Kaisha Toshiba Dispositif et procédé de coulage d'article moulés en résine epoxy
EP1671777A1 (fr) * 2004-12-15 2006-06-21 Fisa Corporation Buse à obturateur
WO2010028465A2 (fr) * 2008-06-23 2010-03-18 Aspem Usinagem E Ferramentaria Me Bloc à canaux froids

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817189B1 (fr) * 2000-11-27 2003-08-15 Berrod Bloc intermediaire pour dispositif de moulage par injection
DE202023105306U1 (de) 2023-09-13 2023-10-16 Juha Kunststoffverarbeitung Gmbh & Co. Kg Spritzgussanordnung für eine Spritzgießmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022009A1 (fr) * 1979-06-26 1981-01-07 Societe dite : SOCIETE LYONNAISE DE VENTILATION INDUSTRIELLE SOLYVENT-VENTEC Ensemble de moule perfectionné pour le moulage des élastomères
US4292018A (en) * 1980-05-21 1981-09-29 Beatrice Foods Co. Double nozzle block
DE3338783C1 (de) * 1983-10-26 1985-03-21 Werner & Pfleiderer, 7000 Stuttgart Spritzgießform zur Herstellung von Formartikeln aus wärmehärtbaren Werkstoffen
DE9110897U1 (fr) * 1991-09-03 1991-11-07 Glittenberg, Willi, 3558 Frankenberg, De
EP0475143A1 (fr) * 1990-09-10 1992-03-18 Incoe International, Inc. Système de distribution de canaux chauds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022009A1 (fr) * 1979-06-26 1981-01-07 Societe dite : SOCIETE LYONNAISE DE VENTILATION INDUSTRIELLE SOLYVENT-VENTEC Ensemble de moule perfectionné pour le moulage des élastomères
US4292018A (en) * 1980-05-21 1981-09-29 Beatrice Foods Co. Double nozzle block
DE3338783C1 (de) * 1983-10-26 1985-03-21 Werner & Pfleiderer, 7000 Stuttgart Spritzgießform zur Herstellung von Formartikeln aus wärmehärtbaren Werkstoffen
EP0475143A1 (fr) * 1990-09-10 1992-03-18 Incoe International, Inc. Système de distribution de canaux chauds
DE9110897U1 (fr) * 1991-09-03 1991-11-07 Glittenberg, Willi, 3558 Frankenberg, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1074367A2 (fr) * 1999-08-03 2001-02-07 Kabushiki Kaisha Toshiba Dispositif et procédé de coulage d'article moulés en résine epoxy
EP1074367A3 (fr) * 1999-08-03 2001-12-12 Kabushiki Kaisha Toshiba Dispositif et procédé de coulage d'article moulés en résine epoxy
EP1671777A1 (fr) * 2004-12-15 2006-06-21 Fisa Corporation Buse à obturateur
US7374418B2 (en) 2004-12-15 2008-05-20 Fisa Corporation Fluid cooled spring biased valve nozzle
WO2010028465A2 (fr) * 2008-06-23 2010-03-18 Aspem Usinagem E Ferramentaria Me Bloc à canaux froids
WO2010028465A3 (fr) * 2008-06-23 2010-05-06 Aspem Usinagem E Ferramentaria Me Bloc à canaux froids

Also Published As

Publication number Publication date
DE9310529U1 (de) 1994-12-01

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