EP3049230A1 - Distributeur de matière en fusion à canal froid - Google Patents

Distributeur de matière en fusion à canal froid

Info

Publication number
EP3049230A1
EP3049230A1 EP14784397.3A EP14784397A EP3049230A1 EP 3049230 A1 EP3049230 A1 EP 3049230A1 EP 14784397 A EP14784397 A EP 14784397A EP 3049230 A1 EP3049230 A1 EP 3049230A1
Authority
EP
European Patent Office
Prior art keywords
cold runner
nozzle block
nozzle
distributor
molding compound
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP14784397.3A
Other languages
German (de)
English (en)
Inventor
Klaus Bühler
Michael DUFFNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braunform GmbH
Original Assignee
Braunform GmbH
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 Braunform GmbH filed Critical Braunform GmbH
Publication of EP3049230A1 publication Critical patent/EP3049230A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • B29C2045/2762—Seals between nozzle and manifold
    • 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
    • B29C2045/2796—Axially movable nozzles or nozzle tips
    • 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
    • B29C45/28—Closure devices therefor
    • B29C45/2806—Closure devices therefor consisting of needle valve systems
    • 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
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
    • 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
    • B29K2091/00—Use of waxes as moulding 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins

Definitions

  • the invention relates to a cold runner melt distributor for a casting or injection molding tool for casting or injection molding of molded parts according to the preamble of claim 1.
  • the molded parts to be cast or to be injection-molded with the cold-runner melt distributor according to the invention are to be understood in the most general sense.
  • the invention includes all molding compounds which are supplied at a temperature of less than 150 ° C and then solidify in the mold cavities.
  • a first example is the injection molding of silicone parts.
  • the appropriate molding compound is supplied in the cold state. After the molding compound has been heated in the mold cavities, a chemical crosslinking and thus a solidification take place.
  • this means for this example that in the cold runner melt distributor, the molding compound to be supplied has a comparatively lower temperature, while in the molding area for chemical crosslinking of the molding compound a higher temperature prevails.
  • rubber, duromers, thermosets, etc. may be provided as the molding compound.
  • a second example is the use of molding compositions which are supplied in a viscous form below a temperature of 150 ° C and then cooled in the mold cavities to thereby solidify.
  • An example of this would be soap, which is liquid at 80 ° C and solidifies after cooling in the mold cavity.
  • soap which is liquid at 80 ° C and solidifies after cooling in the mold cavity.
  • wax, food, technical metal alloys, etc. may be provided as a molding material.
  • the cold runner melt distributor according to the invention is intended for casting or injection molding of moldings for molding compounds, which are supplied to the mold cavity cold with a temperature of less than 150 ° C and chemically react with each other after heating within the mold cavity for solidification.
  • the cold runner melt distributor according to the invention can also be used for molding compositions which are in the cold state, ie. H. with a temperature below 150 ° C
  • CONFIRMATION COPY be supplied to the mold cavities without these molding compositions chemically react with each other. Here the solidification takes place by cooling. 2
  • the known tools for casting or injection molding of molded parts have a plurality of mold cavities, which - as stated - the molding material is supplied via a cold runner melt distributor and in which then solidifies the molding material.
  • Each mold cavity is assigned a feed for the molding compound.
  • This feed for the molding compound has a feed channel, which defines a feed nozzle at the front end and in which a valve pin is arranged.
  • each feed of the molding compound assigned to the respective mold cavity is formed in a separate block. If several mold cavities are provided, the corresponding blocks are joined together with their molding material feeds.
  • the disadvantage here is that so that only relatively large pitches are possible, so that the tool is overall very bulky or that for a given tool size only a very limited number of mold cavities can be accommodated.
  • the basic principle is that the feeders are equipped inside the block back with a sealing ring. This serves as a seal and on the other he exerts a pressure on the cold runner for a corresponding seat in the block. Disadvantageously, the seal then always depends on the interference fit, and vice versa.
  • the invention is based on the invention to provide a cold runner melt distributor for a casting or injection molding tool for casting or injection molding of molded parts of the type specified, in which the arrangement of the nozzle block is improved.
  • the nozzle block is defined between two plates. This is understood to mean that an outlet plate for the melt is provided in the front nozzle region, while a distributor plate is provided at the rear region of the cold channel.
  • This rear distributor plate serves as a main distributor for the melt of the molding compound to be supplied.
  • the rear side of the system has, on the one hand, a tension spring, for example in the form of a disc spring and, on the other hand, a sealing ring.
  • valve pin is arranged directly in the associated feed channel. This means that the valve pin is located directly in the corresponding hole of the nozzle block. This creates an extremely compact design.
  • a second variant proposes according to claim 3, that an additional sleeve-shaped nozzle body is provided, in which the valve pin is received.
  • This additional use of a nozzle body has the advantage that thereby easier cleaning is possible.
  • the sealing effect is improved.
  • a cold runner melt distributor is provided for a casting or injection molding tool for casting or injection molding of molded parts, which is characterized by small and narrow nest spacings of the mold cavities.
  • This has the advantage that the tool is very compact with its mold cavities.
  • the basic idea consists in a monoblock in which the individual feeds for the molding compound are formed and accommodated to the mold cavities. This means that this nozzle block / monoblock common to all feeds has corresponding feed channels corresponding to the number of mold cavities. Thus, the nozzle block / monoblock on mutually parallel holes, which define the cold channels and in which the actual facilities of the cold runners are used.
  • the nozzle block has tempering channels for tempering the molding compound. These tempering channels can run on a very specific way through the nozzle block, so as to achieve the desired tempering performance. Tempering can mean cooling or heating.
  • the development according to claim 6 proposes that in the front nozzle area either between the nozzle block and the front outlet plate or between the nozzle body and the front outlet plate a pressure-resistant insulating is arranged with low thermal conductivity.
  • This disc can consist of a solid surface material.
  • 1a is a sectional view through a nozzle block of the cold runner melt distributor in a first embodiment variant without additional nozzle body
  • FIG. 1 b is a section along the line B-B in Fig. 1a,
  • FIG. 2a is a sectional view of the cold runner system in Fig. 1a
  • FIG. 2b shows a sectional view according to the section A-A in Fig. 2a
  • FIG. 2c is a sectional view taken along section B-B in Fig. 2a,
  • FIG. 3a shows a sectional view through a nozzle block of the cold runner melt distributor in a second embodiment variant with additional nozzle body
  • FIG. 3b shows a section along the line B-B in Fig. 3a, Fig. 3c of the detail section A in Fig. 3a, Fig. 3d of the detail B in Fig. 3a,
  • FIG. 4a is a sectional view of the cold runner system in Fig. 3a
  • FIG. 4b is a sectional view taken along the section A-A in Fig. 4a,
  • Fig. 4c is a sectional view taken along section B-B in Fig. 4a.
  • a first embodiment and in Figs. 3 and 4 a second embodiment of a cold runner melt distributor for a casting or injection molding tool for casting or injection molding of molded parts is shown.
  • the cold runner melt distributor has a nozzle block 1 as a central element.
  • nests of the tool feed channels 2 are formed in the form of holes. These are used to supply "cold" molding compound below 150 ° C to the mold cavities.
  • the nozzle block 1 is sandwiched between two plates 6, 7.
  • the front outlet plate 6 defines in the region of the front end of the feed channel 2 of the nozzle block 1 each have a nozzle opening 8, which is visible and closable by means of the axially adjustable valve needle 4.
  • a disc 9 in the form of a pressure-resistant insulating with low thermal conductivity.
  • a spring 10 is arranged in the form of a plate spring in the region of the feed channels 2.
  • a sealing ring 1 between the nozzle block 1 and the rear distributor plate 7 is provided in this area.
  • This sealing ring 11 is located in the side wall area of the above-described parts.
  • the nozzle block 1 has a hump-like projection and the rear distributor plate 7 a corresponding recess - or vice versa - on.
  • FIGS. 3 and 4 differs from the first embodiment in two ways:
  • each cold runner is assigned an additional hollow cylindrical nozzle body 12.
  • the respective valve needle 4 is fixed.
  • the assembly consisting of nozzle body 12 and valve needle 4 is inserted into the associated feed channel 2 of the nozzle block 1.
  • the actual feed of the molding compound follows here by the axial channel, which is formed in the hollow cylindrical nozzle body 12.
  • this embodiment also has a disk 9, a spring 10 and a sealing ring 11 with respect to each cold runner. However, these are arranged between the nozzle body 12 and the front outlet plate 6 and between the nozzle body 12 and the rear distributor plate 7 in a corresponding manner.

Landscapes

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

Abstract

L'invention concerne un distributeur de matière en fusion à canal froid pour un outil de coulée ou de moulage sous pression comportant plusieurs cavités de moule, pour la coulée ou le moulage par injection de pièces moulées. Un bloc de buses (1) est fixé en sandwich entre une plaque de distribution arrière (7) servant à la distribution de la masse de matière de moulage en fusion amenée et une plaque de sortie avant (6) servant à la sortie de la masse de matière de moulage en fusion, un ressort (10) est agencé entre la face frontale arrière du bloc de buses (1) et la plaque de distribution arrière associée (7) ou entre la face frontale arrière d'un corps de buse (12) cylindrique creux agencé dans le canal d'amenée (2) et la plaque de distribution arrière associée (7), et une bague d'étanchéité (11) est agencée autour d'une partie saillante arrière et d'un évidement correspondant qui est formé entre le bloc de buses (1) ou le corps de buse (12) et la plaque de distribution arrière (7).
EP14784397.3A 2013-09-06 2014-09-02 Distributeur de matière en fusion à canal froid Withdrawn EP3049230A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310014883 DE102013014883A1 (de) 2013-09-06 2013-09-06 Kaltkanal-Schmelzeverteiler
PCT/EP2014/002377 WO2015032489A1 (fr) 2013-09-06 2014-09-02 Distributeur de matière en fusion à canal froid

Publications (1)

Publication Number Publication Date
EP3049230A1 true EP3049230A1 (fr) 2016-08-03

Family

ID=51730481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14784397.3A Withdrawn EP3049230A1 (fr) 2013-09-06 2014-09-02 Distributeur de matière en fusion à canal froid

Country Status (3)

Country Link
EP (1) EP3049230A1 (fr)
DE (1) DE102013014883A1 (fr)
WO (1) WO2015032489A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110427B3 (de) * 2018-05-01 2019-10-10 Klöckner Desma Elastomertechnik GmbH Kaltkanalblock

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010033044A1 (en) * 1999-03-19 2001-10-25 Husky Injection Molding, Ltd. Injection nozzle insulator assembly
US20120100242A1 (en) * 2009-06-17 2012-04-26 Runipsys Europe Nozzle and system for injecting thermoplastic material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932488B1 (fr) * 1996-09-18 2003-05-14 Hefner GmbH Elastomere Verarbeitung Moule pour injection destine a des matieres elastomeres durcissables ou vulcanisables
US8628322B2 (en) * 2011-03-04 2014-01-14 Terry L. Schwenk Mold apparatus for use in injection molding of a liquid silicone composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010033044A1 (en) * 1999-03-19 2001-10-25 Husky Injection Molding, Ltd. Injection nozzle insulator assembly
US20120100242A1 (en) * 2009-06-17 2012-04-26 Runipsys Europe Nozzle and system for injecting thermoplastic material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2015032489A1 *

Also Published As

Publication number Publication date
DE102013014883A1 (de) 2015-03-12
WO2015032489A1 (fr) 2015-03-12

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