EP1830996A1 - Moule de moulage par injection - Google Patents

Moule de moulage par injection

Info

Publication number
EP1830996A1
EP1830996A1 EP05850043A EP05850043A EP1830996A1 EP 1830996 A1 EP1830996 A1 EP 1830996A1 EP 05850043 A EP05850043 A EP 05850043A EP 05850043 A EP05850043 A EP 05850043A EP 1830996 A1 EP1830996 A1 EP 1830996A1
Authority
EP
European Patent Office
Prior art keywords
mold
elements
components
injection mold
injection
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Withdrawn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
EP05850043A
Other languages
German (de)
English (en)
Inventor
Gottfried Steiner
Herbert Eichler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1830996A1 publication Critical patent/EP1830996A1/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Withdrawn legal-status Critical Current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
    • B29C45/2608—Mould seals
    • 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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7331—Heat transfer elements, e.g. heat pipes
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • B29C45/401—Ejector pin constructions or mountings

Definitions

  • the invention relates to an injection mold with one or more
  • Form separation planes wherein rigid components, optionally with other, in particular movable mold components, one or more mold cavity (s) r form, in which (s) a liquid or viscous plastic molding compound is injectable.
  • the reproduction of the structure can be done properly in the mold cavity, the air contained in the mold cavity is displaced during injection or it is sucked before. Inadequate venting of the mold or the suction of so-called false air in evacuated molds results in errors in the structure reproduction.
  • the injection molded parts produced in this way usually have to be disposed of as scrap, since the structural differences are visually recognizable and are not accepted by the customer.
  • the invention is therefore based on the object to design an injection mold such that the mentioned surface defects on injection molded parts no longer occur.
  • the object is achieved according to the invention in that at contact surfaces of mutually movable or fixed mold components superficially in the movable and / or fixed Form components are used elements which are softer and more thermally conductive than mold steel and which do not come into direct contact with the plastic melt.
  • the softer, more thermally conductive elements can thus ensure a targeted and rapid heat transfer to actively tempered mold components during injection molding. As a result, a more uniform temperature distribution throughout the mold cavity is achieved, eliminating the negative effects of uneven cooling of the injection molded part.
  • the elements are elastically and plastically deformable, so that in the area of the contact surfaces a seal with respect to the ambient air is achieved. Due to the possible plastic deformation of the material of the elements is a contour-exact adaptation of the elements to the adjacent mold components, the elastic deformability is adapted to changing mechanical loads achieved, the sealing function is maintained.
  • the elements are easily inserted into the wells of the rigid mold components, such as mold halves, and / or the movable or other fixed mold components.
  • An additional fastening for example screwing, soldering, pinning, can be provided.
  • the elements are preferably made of a rapid heat balance between the adjacent mold components causing material and thus lead to a better quality of the surface of plastic parts.
  • the elements can be large-area or strip-shaped inserts.
  • the design of the elements depends on their location in the injection mold and is very variable. An advantage for a good heat dissipation is when the elements are used in the immediate vicinity of the mold cavity.
  • the elements can be connected directly to the movable, interchangeable
  • Molded components are preferred, but is preferred an embodiment in which the elements are used in mold components, which are in contact with movable mold components, such as inserts, slides, Auswerferierin and the like.
  • movable mold components such as inserts, slides, Auswerferierin and the like.
  • the arrangement of the elements on fixed mold components has the advantage that they are independent of the insert used, slide and the like.
  • the material for the elements copper, copper alloys and other good thermal conductivity materials, e.g. Aluminum, in question.
  • the elements can be equipped friction-reducing, in particular, the material for the
  • Elements contain friction-reducing additives to reduce friction losses between the movable and the fixed mold components.
  • FIG. 2 to Fig. 4 partial sections through further embodiments according to the invention executed injection molds.
  • Fig. 1 shows a longitudinal section through an injection mold with a mold half 1, which is connectable via a sprue bushing 1a with an injector, not shown, and therefore the fixed mold half, and with a second mold half 2 as a movable mold half.
  • the mold cavity 9 which here is an example for injection molding a substantially cylindrical container, such as a cup, is provided.
  • the jaws 3 enclose the lateral surface of the container to be formed and are provided with circumferential depressions 3a through which the plastic melt in the container forms circumferential elevations.
  • the jaws 3 are trapezoidal or conical in cross-section, such that when removing the jaws 3 stand out from the surveys formed in the molding.
  • the two mold halves 1, 2 are, as in the prior art, by means of a plurality of cooling holes 5 can be cooled or tempered.
  • a coolant for example water
  • the Spitzg phonevorganges to dissipate heat.
  • the introduced hot plastic melt is in close contact with the surface of the mold cavity 9, which on the one hand leads to the image of the structures of the mold cavity surfaces in the plastic and on the other hand, a release of heat from the melt on the
  • Mold wall causes the cooling medium.
  • the movable jaws 3 are not integrable in the system of cooling holes.
  • the mold halves 1, 2, according to the invention at the contact surfaces of the mold halves 1, 2 to the jaws 3 shallow depressions 10, 11 are formed, in which elements 6 are used, which are softer and more thermally conductive than the mold steel.
  • the depressions 10, 11 have a constant depth of a few millimeters and can be provided for inserting large-area elements 6 or even smaller, for example strip-shaped elements 6.
  • the outer sides of the elements 6 form uniform surfaces with the adjacent molding surfaces.
  • soft elements 6 are mainly copper and copper alloys in question.
  • 1 denotes the nozzle-side, fixed and 2 the movable mold half.
  • the mold cavity 9 is also provided for injection molding of a container, optionally here in a slightly different from Fig. 1 form.
  • the cylindrical shell and the bottom of the container are formed in Formnestabroughen between the two mold halves 1, 2, close to the Mold cavity 9 are each provided with a plurality of cooling holes 5.
  • a mold insert 4 may optionally be formed a mold cavity portion 9a, which forms a circumferential groove on the edge of the container.
  • the provision of such a mold insert can bring manufacturing advantages.
  • At the contact surfaces of the mold insert 4 to the two mold halves 1, 2 shallow depressions 11, 12 are formed, in which, analogous to Fig. 1, elements 6 are used made of soft, fructoleitfixedem material. Also in this embodiment, therefore, the elements 6 provide for a targeted and rapid transfer of heat from the mold cavity portion 9a on the adjacent, active on the holes 5 tempered mold components.
  • FIG. 3 shows a section of an injection mold with an ejector pin 7. Shown again are the mold half 1 and the mold half 2 as well as some of the cooling holes 5 provided in the two mold halves 1, 2. Only one section is shown from the mold cavity 9. Here also guided in a bore of the mold half 2 ejector pin 7 is attached, which is anchored in a further, plate-shaped form component 15. The ejector pin 7 can not be tempered.
  • Fig. 4 shows an embodiment with an obliquely to the mold opening direction movable ejector or inclined slide 8.
  • the oblique arrangement allows release of the formed in the undercut 9b of the mold cavity 9 injection molding.
  • soft and highly heat-conductive elements 6 are inserted into corresponding recesses 11 of the mold half 2 at the contact surfaces of the mold half 2 to the slide 8, the mold cavity 9 adjacent.
  • an element 6 is likewise arranged.
  • the elements 6 are elastically and plastically deformable to a certain extent. This is, as already mentioned, achieved in the area of the contact surfaces and a seal against the ambient air. Due to the possibility of plastic deformation, contour-accurate adaptation of the elements 6 to the adjacent mold components is ensured.
  • the elastic deformation ensures that the elements 6 can adapt to changing mechanical loads without having to accept a loss of their sealing function. In particular, in complex injection molds with a plurality of separations, therefore, the effectiveness of the evacuation of the mold cavity is increased, and it is sucked in a much smaller amount of unwanted air from the environment.
  • a low modulus of elasticity of the elements 6 compared to the mold steel used ensures that the closing force acting on the tousding area is not reduced. This prevents burr formation on the injection molded part.
  • the rapid removal of heat introduced during injection molding and the sealing of the mold in the area of ejectors, sliders, inserts and the like provides a significantly better transfer of the mold cavity structures to the
  • connection or anchoring of the highly heat-conductive elements or inserts on the corresponding mold components can be done by means of all common joining techniques, such as screwing, but an undesirable influence on the thermal conductivity should be avoided.
  • the invention is of course applicable to injection molds of various designs, in particular also in the case of molds with a plurality of parting planes and / or with a plurality of mold cavities.

Landscapes

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

Abstract

La présente invention concerne un moule de moulage par injection comprenant un ou plusieurs plans de séparation de moule. Des composants rigides, éventuellement avec d'autres composants de moule notamment mobiles, forment une ou plusieurs cavités de moule dans lesquelles une matière plastique à mouler fluide ou semi-fluide peut être injectée. Sur des surfaces de contact de composants fixes ou mobiles l'un par rapport à l'autre, des éléments (6) sont montés en surface dans ces composants fixes et/ou mobiles. Ces éléments sont plus souples et meilleurs conducteurs thermiques que l'acier du moule et ils n'entrent pas en contact direct avec la masse fondue de matière plastique. Lesdits éléments (6) garantissent un meilleur équilibre calorifique entre les composants de moule qui leur sont adjacents et permettent ainsi une meilleure reproduction plus uniforme de structures dans la surface du moule par la masse fondue de matière plastique. Les éléments (6) servent également de joints protégeant contre une aspiration d'air lors de l'évacuation des cavités, avant l'injection de la masse fondue de matière plastique, ce qui offre également des effets positifs sur la reproduction des structures par la masse fondue de matière plastique.
EP05850043A 2004-12-22 2005-12-21 Moule de moulage par injection Withdrawn EP1830996A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0093404U AT7990U1 (de) 2004-12-22 2004-12-22 Spritzgussform
PCT/EP2005/057066 WO2006067202A1 (fr) 2004-12-22 2005-12-21 Moule de moulage par injection

Publications (1)

Publication Number Publication Date
EP1830996A1 true EP1830996A1 (fr) 2007-09-12

Family

ID=35376885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05850043A Withdrawn EP1830996A1 (fr) 2004-12-22 2005-12-21 Moule de moulage par injection

Country Status (3)

Country Link
EP (1) EP1830996A1 (fr)
AT (1) AT7990U1 (fr)
WO (1) WO2006067202A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104994851A (zh) 2013-01-10 2015-10-21 格吕伦塔尔有限公司 作为crac通道抑制剂的基于吡唑基的甲酰胺i
WO2014108336A1 (fr) 2013-01-10 2014-07-17 Grünenthal GmbH Carboxamides ii à base de pyrazolyle servant d'inhibiteurs de crac
CN106738701A (zh) * 2017-02-13 2017-05-31 长沙金镂机械科技有限公司 用于反应注射成型模具的抽芯机构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2004526A1 (en) * 1970-02-02 1971-08-19 Geyer & Co Die casting mould with re-entrant shaped wall sections
ES2029186A6 (es) * 1991-02-25 1992-07-16 Navarra Pruna Alberto Perfeccionamientos en los medios de bloqueo y deslizamiento para correderas en moldes de inyeccion.
DE4208351C2 (de) * 1992-03-16 1994-07-21 Hasco Normalien Hasenclever Co Spritzgießwerkzeug zur Verarbeitung plastischer Massen, insbesondere Kunststoffspritzgießwerkzeug
JPH07144328A (ja) * 1993-11-24 1995-06-06 Mita Ind Co Ltd スライドコアの案内具
WO2003020487A1 (fr) * 2001-08-28 2003-03-13 The Yokohama Rubber Co.,Ltd. Procede et dispositif de vulcanisation de pneumatique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006067202A1 *

Also Published As

Publication number Publication date
WO2006067202A1 (fr) 2006-06-29
AT7990U1 (de) 2005-12-15

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