EP4126496A1 - Dispositif et procédé de moulage par injection - Google Patents

Dispositif et procédé de moulage par injection

Info

Publication number
EP4126496A1
EP4126496A1 EP20717142.2A EP20717142A EP4126496A1 EP 4126496 A1 EP4126496 A1 EP 4126496A1 EP 20717142 A EP20717142 A EP 20717142A EP 4126496 A1 EP4126496 A1 EP 4126496A1
Authority
EP
European Patent Office
Prior art keywords
insert
tool
injection molding
injection
alignment
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.)
Pending
Application number
EP20717142.2A
Other languages
German (de)
English (en)
Inventor
Gerald MITTENDORFER
Markus Wimplinger
Friedrich Paul Lindner
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.)
EV Group E Thallner GmbH
Original Assignee
EV Group E Thallner 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 EV Group E Thallner GmbH filed Critical EV Group E Thallner GmbH
Publication of EP4126496A1 publication Critical patent/EP4126496A1/fr
Pending 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
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
    • B29C45/2632—Stampers; Mountings thereof
    • 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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/768—Detecting defective moulding conditions
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • 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
    • B29C45/2602—Mould construction elements
    • B29C45/2606—Guiding or centering means
    • 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
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
    • B29C45/2675—Mounting of exchangeable mould inserts
    • 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
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/372—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings provided with means for marking or patterning, e.g. numbering articles
    • 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
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/376—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings adjustable
    • 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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/80—Measuring, controlling or regulating of relative position of 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C2033/0005—Moulds or cores; Details thereof or accessories therefor with transparent parts, e.g. permitting visual inspection of the interior of the cavity
    • 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
    • B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
    • 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
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
    • B29C2045/2653—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs using two stampers
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/76163—Errors, malfunctioning
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76177—Location of measurement
    • B29C2945/76294—Inserts
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76344—Phase or stage of measurement
    • B29C2945/76351—Feeding
    • B29C2945/76357—Feeding inserts
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76568—Position
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76772—Inserts
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76822—Phase or stage of control
    • B29C2945/76829—Feeding
    • B29C2945/76836—Feeding inserts
    • 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
    • B29K2821/00—Use of unspecified rubbers as mould material
    • B29K2821/006—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
    • B29K2883/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as mould material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/756—Microarticles, nanoarticles

Definitions

  • the invention relates to a method and a device for injection molding.
  • Injection molding as a manufacture for microreplication is a well-known technology.
  • the technology has reached the natural limits of the polymer processing industry.
  • the increased demands on the shape and position tolerances of the injection-molded articles produced by injection molding cannot be adequately implemented with the previous methods. If, for example, the front and back of an injection molding tool are to be aligned with one another, the injection molded articles can currently only be manufactured with tolerances of around 10 micrometers.
  • injection molded articles that are used in certain branches of industry such as information technology, laser technology or communication network technology, these orders of magnitude are unacceptably high, because the accuracy requirements, especially for light guides, are in the micrometer or submicrometer range.
  • improvements with more precise manufacturing can no longer be achieved due to the manufacturing tolerances of the systems.
  • Injection molding technology can be expanded by methods from the semiconductor industry in order to be able to produce injection molded articles with increased accuracy.
  • the alignment of the tool or the inserts takes place in an open state in which two or more tool halves or tool parts do not yet provide an injection molding space for the injection molding compound later introduced therein. After the respective tool has been brought into the closed state for injection molding, it is no longer possible to align the tool halves or the insert (s) arranged in the injection molding space. Thus, alignment errors, especially those which for the high demands on the micro-injection molded articles have to be corrected, only take place when the tool is open. During or after the tool is closed, the tool or the insert (s) may be misaligned. In particular, series production of injection molded articles with the same tool or the same insert (s) for injection molding cannot therefore be carried out with sufficient accuracy.
  • the invention relates to a device for injection molding, in particular for micro injection molding, at least comprising: - A tool with a first tool half and a second tool half, wherein the first tool half and the second tool half define an injection molding space in a closed state of the tool and
  • the device has at least one insert which at least partially has a polymer.
  • the device can also have two inserts or more which at least partially comprise a polymer.
  • the at least one insert is preferably alignable in the closed state of the tool, in particular to a further insert.
  • the invention relates to a method for injection molding, in particular for micro injection molding, an injection molding space being defined by a tool with a first tool half and a second tool half in a closed state of the tool, at least one insert arranged in the injection molding space having at least partially a polymer.
  • Two or more inserts which at least partially comprise a polymer can also be arranged in the injection molding space.
  • the at least one insert is preferably aligned in the injection molding space in the closed state of the tool, in particular for a further insert.
  • the at least one insert has an elastic surface made of structured, molded polymer, in particular produced by means of imprint lithography.
  • the at least one insert or its surface can represent a structured soft stamp which is used as a master for the original molding of the injection molded article.
  • the insert consists of a substrate (back plane), in particular a plate, more preferably a wafer, on which the polymer to be structured is deposited and embossed in order to produce the elastic structures.
  • the at least one insert is a component group consisting of at least two components, namely a substrate and a soft stamp embossed thereon.
  • the substrate serves in particular as a carrier substrate for the soft punch.
  • the at least one insert consists at least partially of a polymer-elastic material.
  • the at least one insert consists at least partially of an elastomer.
  • the insert in particular the elastic structures, consists of at least one of the following materials:
  • Silanol functional polymers • Silanol-terminated polydimethylsiloxane, especially CAS: 70131-67-8
  • Dimethylsiloxane copolymer especially CAS 68951 -93-9 and / or CAS: 68083-14-7
  • Epoxypropoxy propy lmethylsiloxane-dimethylsiloxane copolymer especially CAS: 68440-71-7
  • Tris (glycidoxypropyldimethylsiloxy) phenylsilane especially CAS: 90393-83-2
  • Epoxycyclohexylethylmethylsiloxane-dimethylsiloxane copolymer especially CAS: 67762-95-2
  • Epoxycyclohexylethylmethylsiloxane - dimethylsiloxane copolymer, especially CAS: 67762-95-2 • (2-3% Epoxycyclohexylethylmethylsiloxan) (10-15% MEthoxypolyalkyleneoxymethylSiloxan) - Dimethylsilxoan terpolymer, especially CAS: 69669-36-9
  • Dimethylsiloxane copolymer in particular: CAS: 104780-61-2
  • TEOS Tetraethylorthosilicate
  • PFPE Perfluoropolyether
  • the at least one insert is inserted into the first tool half or into the second tool half when the tool is open and, in particular, is fixed.
  • the tool In the closed state, the tool has the injection molding space inside, which is formed by the first and second tool halves.
  • the at least one insert is arranged in the injection molding space and can preferably be aligned. In this way, an alignment of at least an insert advantageously take place in the closed state of the tool and an alignment error can be corrected.
  • the at least one insert in one or more directions relative to the tool or to the
  • Injection molding space is movable.
  • the alignment error is preferably determined by measuring an injection-molded article produced by means of injection molding.
  • the device and the method are preferably designed for the series production of injection molded articles with particularly high demands on dimensional accuracy.
  • the device and the method can be used to produce injection-molded articles which have functional areas. These functional areas are shaped on the injection-molded article in particular by the at least one insert that can be aligned, in particular when an injection molding compound introduced into the tool is hardened.
  • the device has at least one further insert arranged in the injection molding space, wherein the insert and / or the at least one further insert can be aligned in the closed state of the tool. In this way, injection molded articles with multiple inserts can be formed or manufactured.
  • the inserts can advantageously be aligned with one another in the closed state of the tool.
  • this enables precise alignment for production by aligning both inserts.
  • an insert is in particular in arranged in the first tool half and the at least one further insert arranged in the second tool half.
  • Another preferred embodiment of the invention provides that the insert and / or the at least one further insert each have an impression surface with elastic structures.
  • the shape of the injection-molded article can advantageously be predetermined by means of the molding surfaces.
  • the elastic structures particularly small, in particular microstructures and / or nanostructures, can advantageously be molded onto the injection molded article in an injection molding process.
  • the elasticity of the structures allows an even finer and more precise impression of the structures on the injection molded article.
  • shapes that interlock or undercut can also be molded.
  • Rigid structures could either destroy the microstructures and / or the nanostructures or even be destroyed when they are removed from the mold.
  • Inclined microstructures and / or nanostructures may be mentioned as an example.
  • the elastic structures preferably consist of a polymer that is used in the semiconductor industry for soft stamps.
  • Such polymers are mentioned, for example, in the publications WO2015078520A1 and WO2014202127A1.
  • the impression surface of the at least one further insert can be aligned with one another in the closed state of the tool.
  • the shape of the injection molded article can advantageously be specified extremely precisely.
  • Another preferred embodiment of the invention provides that the structures of the molding surface of the at least one insert and the structures of the molding surface of the at least one further insert can be aligned with one another in the closed state of the tool.
  • the positions of the molded structures on the front and the rear side of the injection molded article can advantageously be set exactly with respect to one another.
  • At least one heater is / are integrated in at least one of the tool halves and / or in the at least one insert and / or in the at least one further insert and / or in the respective structures, so that the injection molding space, in particular an injection molding compound conducted into the injection molding space, can be heated in a targeted manner by the at least one heater.
  • the heater can be any type of heater. Resistance heating or induction heating, for example, would be conceivable.
  • inductive heating By means of inductive heating, the boundary surfaces of the tool or the insert or the inserts, in particular the molding surfaces with elastic structures, which are in direct contact with the injection molding compound during injection molding, can advantageously be heated.
  • An uncontrolled solidification of the injection molding compound, in particular on the fine structures of the molding surface of the inserts, can be prevented in this way and the liquid injection molding compound can advantageously be kept evenly heated during an injection molding process.
  • the quality of the impression is increased or a form defect in the injection-molded article to be produced is prevented.
  • a molding of the microstructures and / or the nanostructures is improved and simplified by the heated molding surface or the heated structures.
  • the heater is built into the at least one insert. If the at least one insert is a semiconductor, the heater is implemented directly as an active component, i.e. metallic conductor tracks or semiconductor elements that are capable of efficiently converting electricity into Joule heat are produced directly in at least one insert.
  • the heating is preferably carried out as in the document WO2019210976.
  • Another preferred embodiment of the invention provides that the at least one insert and / or the at least one further
  • Insert in particular on the respective impression surface and / or on a respective rear side, has / have a plurality of alignment marks.
  • the alignment marks are markings to which a specific position on the insert can be assigned.
  • alignment marks in particular an alignment mark field, in which each alignment mark can be assigned a specific position in the alignment mark field.
  • the alignment marks on the impression surface can in particular be the structures arranged on the impression surface of the at least one insert.
  • the at least one insert preferably has alignment marks on the impression surface and on the rear side. Particularly preferably, the positions of the alignment marks on the impression surface in relation to the positions of the alignment marks on the rear side of the at least one insert are known to one another.
  • the alignment marks can preferably be detected, processed and set in relation to one another by an optical alignment means.
  • the alignment means can for example be arranged inside the tool, in particular on the rear side of the at least one insert.
  • the alignment marks enable particularly precise and simple alignment of the at least one insert.
  • Another preferred embodiment of the invention provides that the first tool half and / or the second tool half has / have viewing windows so that the at least one insert and / or the at least one further insert can be aligned using the plurality of alignment marks when the tool is closed is and / or can be aligned with one another.
  • the viewing window is arranged in the tool in such a way that the alignment marks of the at least one insert and / or of the at least one further insert can be viewed from outside the tool, in particular can be viewed or detected for an optical alignment means.
  • the viewing window is preferably arranged in the tool in such a way that, when the tool is closed, at least the alignment marks on the rear side of the at least one insert can be seen. A monitored relative alignment of the respective insert can thus advantageously be carried out.
  • the first tool half and / or the second tool half each have at least one positioning mechanism, so that the at least one insert and / or the at least one further insert based on the plurality of alignment marks in the closed state of the tool can be aligned.
  • the positioning mechanism can, in particular in an automated or computer-controlled manner, advantageously carry out the alignment of the at least one insert and / or the at least one further insert with the tool closed.
  • the alignment is advantageously carried out on the basis of the alignment marks.
  • the positioning mechanism is designed in such a way that the at least one insert or the inserts can be aligned particularly precisely.
  • the positioning mechanism is preferably an aligner.
  • the insert to be aligned is fixed in the tool, but can be aligned by the positioning mechanism. In this way, the at least one insert can advantageously be aligned using the alignment marks even when the tool is closed.
  • the structures of the impression surface of the at least one insert and the structures of the impression surface of the at least Another insert can be aligned with one another in the closed state of the tool.
  • the position of the alignment marks on the rear side of the at least one insert in relation to the structures on the impression surface of the at least one further insert is known.
  • the insert and / or the inserts, in particular the structures that are important for the molding on the injection molded article can advantageously be aligned or aligned with one another only on the basis of the alignment marks on the respective rear side.
  • alignment of the structures on the molding surface of the inserts is advantageously only possible by means of the alignment marks on the rear side.
  • alignment based on the alignment marks on the back of an insert can also be carried out during injection molding.
  • Another preferred embodiment of the method according to the invention provides that the at least one insert and at least Another insert arranged in the injection molding space, in particular an impression surface of the at least one insert and / or an impression surface of the at least one further insert, can be aligned with one another in the injection molding space in the closed state of the tool.
  • the method it is possible with the method to align the impression surface, in particular the structures arranged on the impression surface, of the inserts or to align them with one another.
  • the dimensional accuracy of the injection-molded article produced is advantageously increased in the injection molding.
  • Another preferred embodiment of the method according to the invention provides that the at least one insert and / or the at least one further insert is / are aligned on the basis of a plurality of alignment marks attached to the insert and / or the at least one further insert.
  • the at least one insert and / or the at least one further insert can advantageously be aligned on the basis of the alignment marks.
  • the at least one insert and / or the at least one further insert is aligned on the basis of a measurement of an injection molded article produced by the injection molding method. After an injection molded article has been created, it can be measured and analyzed. The actual values of the shapes or the geometries of the injection molded article are compared with target values. A form error can be determined from this comparison and a correction can be derived. By realigning the insert or the inserts, this error can be iteratively improved when the alignment is carried out several times, in particular until the form error is within a predetermined tolerance range.
  • the areas of the injection molded article are preferably measured, in which the structures arranged on the molding surfaces are molded, as these are particularly important for the functionality of the produced
  • Injection molded articles are important. In this way, the alignment can be improved on the basis of a manufactured injection-molded article.
  • alignment is carried out by reworking the at least one insert and / or the at least one further insert.
  • a correction is carried out by aligning the insert or the inserts.
  • Alignment can also be achieved by post-processing, in particular removal or application of appropriate material.
  • the method has at least the following steps, in particular in the following order: i) equipping the tool with the insert and / or with the at least one further insert, ii) closing the tool, iii) producing an injection-molded article, in particular by introducing an injection-molding compound and curing the injection-molding compound, iv) removing and measuring the injection-molded article, v) determining an alignment error by comparing it with target values, vi) aligning the insert and / or the at least second insert.
  • the injection molding method can advantageously be iteratively adapted to the process by aligning the inserts.
  • One aspect of the present invention is based on a modification of the injection molding process or the injection molding device so that surfaces with micrometer or nanometer structures can be produced with at least partially flexible inserts, in particular inserts with surface structure using soft stamp technology.
  • approaches from the semiconductor industry are used to align molded parts or the molding surfaces or to align them with one another.
  • feedback means that the injection-molded article produced several times in series is measured and any defects that can be detected on the injection-molded article are compensated for by aligning the inserts and / or by reworking the inserts, so that the quality of the injection-molded article produced in each case can be improved iteratively.
  • the device according to the invention and the method according to the invention make it possible to functionalize the surface (s) of the embossed workpiece, so that the manufacturing costs can be reduced by optimizing the respective manufacturing process and at the same time the accuracy of the workpiece is increased.
  • a conventional manufacturing method can be used for the molding will.
  • the surface functionalization is achieved with the novel, highly precise at least one insert in the tool.
  • the manufacture of an injection-molded article with functional surfaces or micro- and / or nano-structured surfaces was previously not possible with conventional injection molding devices or injection molding processes.
  • the present invention relates to a method and a device for injection molding, in particular micro injection molding. It is about the production of injection molded articles with very small structures, which are molded onto the injection molding compound or the corresponding injection molded article through the molding surfaces.
  • a known injection molding device is designed in such a way that the accuracy and / or shape and position tolerances and / or surface quality and / or surface functionality of the injection molded article produced are improved by means of, in particular, at least partially elastic, preferably microstructured inserts.
  • an injection-molded article is generally produced in a tool in an original molding or injection-molding space (also called an injection-molding chamber), the tool being filled with an injection-molding compound.
  • the injection molding compound has certain state variables in relation to the specific volume, temperature and filling pressure.
  • the tool is filled under high pressure with a compressible and compressed injection molding compound heated above the melting temperature of the injection molding compound, and then pressed down.
  • the temperature of the injection molding compound is in particular 10 ° C., preferably 25 ° C., even more preferably 50 ° C., most preferably 75 ° C. above the melting temperature of the injection molding compound.
  • the melt solidifies under the holding pressure in the tool. After Phase transition into the solid state (with physically induced, unavoidable shrinkage) and especially after reaching atmospheric pressure in the tool, the tool is opened at least in one mold division level and the injection molded article is removed or automatically ejected.
  • the state variables material, temperature, pressure as well as shape and / or functionalization of the tool are responsible for the achievable dimensional accuracy of the injection molded article.
  • the first disclosed injection molding device includes at least one modified tool with at least one insert for adapting and / or functionalizing the tool and thus the injection molded article produced.
  • the insert preferably has an in particular micro- or nano-structured surface which is molded during the production of the injection-molded article.
  • the at least one insert particularly preferably has a coating, preferably a structured coating, particularly preferably a microstructured or nanostructured coating, which is molded during the production of the injection molded article.
  • the at least one insert has an elastic structure, in particular with microstructures and / or nanostructures.
  • an in particular at least partially rigid insert with flexible structures on its surface can make a better impression of injection molded articles with high accuracy and high requirements Surface structuring and / or tight shape and position tolerances can be produced.
  • a separation of functions is preferred, in particular between coarse and fine
  • Shaping and functionalization of at least one article surface brought about by the shape and design of the tool and / or of the at least one insert defining at least the rough shape and the, in particular, elastic structuring of the insert surface, which is molded in the injection molded article, the surface of the injection molded article or the functionalization the surface of the injection molded article is determined.
  • an additional, local heater is built into at least one, in particular micro- or nano-structured, insert in order to increase the dimensional accuracy of the impression and to obtain a higher so-called form factor (aspect ratio), i.e. to produce higher and narrower structures can.
  • the heater is coupled into the surface structure of the at least one insert in order to heat the injection molding compound in a targeted manner and directly in the areas in contact with the injection molding compound.
  • the form factor of the structured impression surfaces can thus be further improved.
  • an independent invention is seen in the tool of an injection molding device according to the invention.
  • the parts of the tool that are not primarily relevant for the function of the injection-molded article can be designed with conventional manufacturing processes according to ISO 2768-1 and ISO 2768-2, in particular classified as “fine” or “high”.
  • the tool includes at least one insert.
  • the at least one insert can be coated and thus functionalized by means of an embossing process at least on the surface of the insert to be molded.
  • the at least one insert with higher requirements in terms of surface quality, functionalization such as, in particular, microstructured periodic surface structures is preferably produced with so-called microreplication, in particular micro- or nanolithographic embossing processes, and integrated into the tool as an at least partially elastic insert.
  • microreplication in particular micro- or nanolithographic embossing processes
  • the at least partially elastic structures on the at least one insert can advantageously be molded individually and precisely onto the injection molded article.
  • the surface structures of the at least one insert are produced for example by means of lithographic imprint technology on the respective insert, in particular like the technology that is described in detail in the document EP2870510B1.
  • the at least one insert which can contain, for example, inorganic carriers, preferably semiconductor materials, and / or particularly preferably silicon nitride (S13N4) and / or silicon carbide (SiC) and / or diamond and / or technical glass, is preferably fastened in the tool so that it can be aligned.
  • the at least one insert is consequently fixed in place, but can be moved in a targeted manner and thus be stored fixed in a different position. It is also conceivable that, using a known imprint lithography technology, an in particular elastic structure is first produced on a carrier, which structure is then transferred to the surface of the at least one insert.
  • plasma activation and / or adhesives can be used for structure transfer.
  • the elastic structures are preferably produced directly on the surface of the at least one insert.
  • An aligner can be used for aligning and / or pre-fixing the structure on the surface of the at least one insert.
  • a processing laser can be used to fasten the carrier on the at least one insert or can be integrated in the tool.
  • the tool it is possible to align and fasten the at least one insert with an aligner known from semiconductor technology in the tool.
  • the alignment accuracy of the at least one insert in the tool is better 5 micrometers, preferably better 1 micrometer, particularly preferably better 500 nanometers, very particularly preferably better 250 nm, in particular in the lateral plane of the tool.
  • the same alignment accuracy can be provided by the aligner or further aligners in other directions of movement of the tool.
  • the alignment accuracy of the at least one insert in the tool is preferably measured on the injection-molded article produced.
  • the first or the first injection-molded articles produced can therefore be measured and the alignment accuracy can thus be determined by comparing the measured actual values with predetermined target values.
  • An aligner is preferably integrated as an alignment module in the injection molding device. Accordingly, with a modular design, the devices with modules such as measuring modules for measuring the injection molded article, material processing module can be added to the injection molding device flexibly and according to application requirements.
  • the injection molding device contains an aligner and imprinter for the production of an in particular elastic micro- or nano-structured surface on an insert.
  • the attachment establishes a connection between the at least one insert and the tool, which is adapted to the operating conditions (overpressure up to over 2000 bar, preferably over 2400 bar, temperatures of the stamping compound and of the tool up to over 150 degrees Celsius, preferably up to over 200 degrees Celsius) or is designed.
  • the at least one insert is fixed in the tool in a true-to-position and position-accurate manner, in particular free of force.
  • the non-compulsive fastening of the at least one insert in the tool means that exactly six degrees of freedom of movement for the at least one Can be used. In this way, deformations due to parasitic forces on the insert are advantageously avoided.
  • misalignment therefore exists relatively between an insert and a second component, in particular a further insert.
  • the alignment error, in particular measured relatively for two inserts facing each other with their respective impression surfaces, on the injection molded article is preferably less than 10 micrometers, preferably less than 5 micrometers, particularly preferably less than 1 micrometer, very particularly preferably less than 500 nanometers, most preferably less than 200 nanometers.
  • the alignment error on the injection-molded article is therefore less than 150 nanometers, preferably less than 100 nanometers, particularly preferably less than 50 nanometers.
  • the period error is to be regarded as a deviation from the ideal, predetermined alignment state. ⁇ ⁇ Only the deviation, i.e. the defect in the injection molded article, counts. It is thus advantageously possible to specify the alignment status of the periods with respect to one another as a quality feature.
  • An alignment error which is exactly one period, only causes an error at the edge of the embossed structures of the injection-molded article, in other words an offset error by the length of one period.
  • the alignment error in particular period error, should be less than 0.25 period, preferably less than 0.1 period, particularly preferably less than 0.05 period, measured on the injection-molded article.
  • the misalignment must also be minimal with respect to rotation.
  • the structures should not deviate by more than 1.0 ⁇ m over a distance of 50 mm. This corresponds to a maximum angle of 2 * 10 -5 °.
  • the alignment error with respect to the angle is therefore less than 2 * 10 -5 °, preferably less than 10 -5 °, even more preferably less than 5 * 10 -6 °, most preferably less than 2 * 10 -6 °, most preferably less than 2 * 10 -7
  • a rotation error with a reference length of 50 mm will be less than 1 ⁇ m, preferably less than 500 nm, particularly preferably less than 250 nm, very particularly preferably less than 100 nm, most preferably less than 10 nm measured on the circumference and / or edge of the article.
  • the injection molding compound can contain a light-sensitive, particularly UV-curing, component.
  • a light-sensitive, particularly UV-curing, component When using such an injection molding compound, there is no thermally induced hardening or phase transformation from a liquid to the solid Injection molding compound instead, but a phase change based on UV radiation.
  • the tool in this embodiment of the injection molding device contains integrated radiation sources and / or radiation windows that are transparent for the curing radiation, through which the curing radiation irradiates the injection molding compound in order to initiate curing.
  • the tool is transparent.
  • Polymers and / or their mixtures and / or blends with or without fillers can be used, which in particular can contain the following materials:
  • LDPE -Polyethylene
  • HDPE high density polyethylene
  • PP polypropylene
  • PVC chlorinated polyethylene
  • PMMA / or -Polystyrenes
  • PMMA / or -Methacrylate
  • PET / or -Terephthalate
  • PTFE / or -fluorinated Polymers
  • the shrinkage of the injection molding compound used is preferably less than 5%, particularly preferably less than 3%, even more preferably less than 1.7%, most preferably less than 0.7%.
  • a second embodiment of an injection molding device contains at least one modified tool with two inserts which are to be aligned with one another and which carry out the functionalization of the injection molded article with in particular elastic, preferably microstructured and / or nanostructured surfaces.
  • At least two inserts with, in particular, elastic microstructured and / or nanostructured insert surfaces in the tool can be aligned with one another and fastened.
  • the alignment accuracy of the inserts to one another in the tool is as much as the alignment accuracy of an insert in the tool.
  • the inserts in the tool it is possible to arrange the inserts in the tool so that they fall on different halves of the tool parting plane.
  • the device and the method for injection molding can be designed to be particularly flexible with regard to the position of the inserts in the tool.
  • the tool can be at least partially transparent.
  • the tool can have removable support parts, which are used for power transmission and uniform force distribution of the contact pressure, as well as viewing windows or Alignment window, with the help of which the inserts or the structured surfaces of the inserts can be aligned when the tool is completely closed.
  • the tool can contain corresponding support structures.
  • the viewing windows can in particular also be designed for curing the injection molding compound with UV radiation.
  • the alignment can take place, for example, by so-called alignment marks or markings. These are attached to the insert or inserts. There is preferably at least one marking on each insert that can be aligned in the closed state of the tool.
  • the alignment is preferably carried out by an optical alignment of at least one marking, which is arranged on the back of an insert, to an alignment mark, which is arranged on the back of a further insert.
  • alignment can be beneficial take place via the rear sides of the inserts facing away from the respective impression surfaces.
  • the markings or alignment marks can be crosses, propeller-like alignment marks, which are common in the semiconductor industry.
  • Circles polygonal patterns, line patterns for optical interference, QR codes.
  • the alignment marks are preferably arranged in a mark field, the individual alignment marks having an information content so that the position in the mark field, and thus the position of the corresponding insert relative to an optical alignment means, is known. Alignment can then advantageously take place relatively, based on the known position of the individual mark in the mark field.
  • an insert contains alignment marks or markings on two opposing surfaces. These are preferably located on the respective rear side of the insert and on the respective side of the molding surfaces of the insert. In this way, alignment can advantageously take place from both sides of the insert.
  • the injection molding device has an aligner and fixation for two inserts, the aligner correlating a surface structuring, which then act in particular as alignment marks, on the impression surface, to alignment marks on the rear side of the insert, the correlation in particular on Image evaluation based.
  • a back-to-back alignment of at least two inserts can be performed using the correlated data.
  • the optical alignment means for detecting the respective alignment marks on the rear side can be arranged within the tool. The alignment of the inserts to one another can thus advantageously take place when the tool is in the closed state.
  • the alignment takes place by alignment means arranged outside the tool, which can detect the alignment marks or markings of the inserts through, for example, channels or alignment windows.
  • a surface structuring of the insert can take place in a particularly aligned manner on the insert surface or the impression surface, so that the position and location of the particularly soft surface structures can be measured.
  • the surface structures can advantageously serve as alignment marks or markings.
  • the inserts have further markings or alignment marks on the back, which can be measured relative to the surface structures. In this way, when a marking is measured, the position of the opposing surface structures is also known and vice versa.
  • the insert can have different regions or different layers of the surface structures. These can contain surface structures to be molded and / or surface structures not to be molded, in particular alignment marks.
  • the surface structures can be created in a so-called "first print” or in a sequential production.
  • the insert on the surface, in particular provided with soft structures to be molded, of the insert and on the opposite surface of the insert markings, in particular alignment marks, are attached and / or applied and / or introduced.
  • the insert can contain alignment marks and / or alignment mark fields on both surfaces, which in particular qualify the use for alignment in an aligner by means of lithography or electron beam.
  • the alignment marks of the surface structuring are preferably measured in relation to the same surface of the insert in order to be able to verify the position of the surface structures on the insert.
  • the inserts can be aligned with one another on the basis of the non-surface structured (embossed) rear sides, as if the surface structures were aligned directly with one another.
  • the alignment of the inserts with respect to one another is very particularly preferably carried out in the closed tool.
  • the measured alignment errors of the Injection molded articles can be corrected on the basis of error correction vectors, which are derived from the alignment errors of the injection molded articles, in that the inserts are aligned with one another in an improved manner.
  • the check of the alignment success results from the measurement of the injection-molded article produced or the determination of the alignment error on the basis of an injection-molded article produced.
  • the inserts in the closed tool can be positioned or aligned with an infeed movement of less than 1000 micrometers, preferably less than 500 micrometers, particularly preferably less than 250 micrometers, in particular by means of solid joints, in particular without play.
  • air bearings integrated in the tool can promote the mobility of the insert. In this way, an easy and very precise alignment is made possible.
  • the infeed movement means the maximum possible travel of the insert in the tool during alignment.
  • the alignment marks cover at least one area which is larger than the vector sum of the travel vectors of the positioning device or alignment device. For example, should be able to be moved mm in the x direction and 1 mm can be moved in the y direction is also 1, then the alignment marks should be on a surface greater than 1 mm 2 in view of the aligner to be present. It is provided that the inserts can be positioned by means of fine positioners, in particular with piezo drives and / or differential thread adjusting means.
  • piezo drives linear piezo drives, screw drives or the like can be used.
  • the inserts are attached to each other in the tool after the alignment in such a way that the production of a series of injection molded articles or at least the production of an at least statically relevant sample of injection molded articles adjusts the position and the location of the inserts by less than 1%, preferably adjusted by less than 50 ppm, particularly preferably adjusted by less than 100 ppb.
  • the adjustment relates to the ideal value of the injection molded article produced. In other words, the spread of the manufacturing errors with regard to the location and / or position of the inserts is kept within a narrow tolerance field of less than 1%, preferably less than 50 ppm, particularly preferably less than 100 ppb.
  • the inserts can be fastened in the tool, in particular for series production.
  • fastening is understood to mean that the insert cannot be detached from the tool without damaging the insert (in particular because of the high level of adhesion to the tool). It is conceivable that a fixed insert will have to be replaced. In this case, an insert can be destroyed, but the functionality of the tool should be retained except for the necessary cleaning and should be able to accommodate another insert without reworking the tool.
  • the shape and position tolerances of the injection molded article are increased with the disclosed method, in particular by reworking the elastic surface structures of at least one of the inserts and / or by reworking at least one of the inserts.
  • the plane parallelism of the injection molded article can be increased.
  • the tool or the arrangement of the insert or the inserts are set in an iterative, in particular approximating, validation method.
  • a tool is created with which a particularly statistically relevant amount of injection molded articles, in particular a series, is produced.
  • the injection molded articles are measured and, in particular, evaluated statistically. In this way, an average alignment error can advantageously be determined.
  • a correction of the tool in particular an adjustment of the insert, can then be carried out on this basis.
  • This correction can consist, for example, in the fact that material is removed or added and / or the orientation is changed and / or the position of the insert is adjusted.
  • Corrected injection-molded articles are produced and evaluated in a particularly statistically relevant quantity. Either a further approximation of the ideal injection-molded article is carried out iteratively or production of the injection-molded article is started.
  • a statistical evaluation of random samples of the injection molded article can be carried out in order to be able to carry out further necessary adjustments.
  • the effects of aging and wear and tear on the tool can be recognized at an early stage.
  • a first preferred exemplary method for injection molding is carried out in particular with the following steps, preferably with the following sequence.
  • the tool is equipped with at least one elastic, microstructured or nanostructured insert.
  • the tool is closed.
  • the insert to the tool and / or the inserts to one another, in particular back to back, are aligned and fastened in the tool.
  • the tool is installed in the injection molding device.
  • At least one injection-molded article is produced, in particular by means of an injection-molding process.
  • the injection-molded article is removed from the tool and, in particular, measured in a 3D coordinate measuring machine.
  • the data are passed on to the data memory and data analysis device.
  • the injection molded article is checked for function and / or tested in an optional process step.
  • An error vector field is created by the computer, which was derived from the measured values and the setpoints. The correction factors and corrective measures are determined.
  • the targeted corrections include changing the position and location of the at least one insert in the tool. - A further iteration of the setting of the tool and the insert is optionally carried out.
  • Another preferred exemplary method for injection molding has in particular the following method steps, in particular with the following sequence.
  • the tool is provided in the preparatory process steps. To do this, it is necessary to functionalize the inserts with surface structures.
  • the correlation of each insert from the surface structures to the back of the insert is measured and, in particular, processed in a computer as a data memory and data analysis device.
  • the tool is equipped with, in particular, elastic, microstructured or nanostructured inserts.
  • the tool is closed.
  • the inserts are aligned with one another, in particular back to back, and fastened in the tool.
  • the tool is installed in the injection molding device.
  • At least one injection-molded article is produced, in particular by means of an injection-molding process.
  • the injection-molded article is removed from the tool and, in particular, measured in a 3D coordinate measuring machine.
  • the data are passed on to the data memory and data analysis device.
  • the injection molded article is checked for function and / or tested in an optional process step.
  • An error vector field is created by the computer, which was derived from the measured values and the setpoints. The correction factors and corrective measures are determined.
  • the targeted corrections are applied.
  • the corrections can include at least local material build-up or at least local material degradation or a modification of the surface structure.
  • the thickness variations of the injection molded article or waviness can be changed with targeted material removal or material build-up on the back of the insert.
  • Press-in pressure that is present during injection molding can be used in order to utilize the occurring deformation of the insert in a targeted manner and to influence the shape of the injection-molded article at least locally.
  • the volume of the injection molded article increases. Local depressions in the injection molded article can thus be corrected. If material is built up at least locally on the back of the insert, the volume of the injection molded article is reduced.
  • the modified insert is built into the tool and a further iteration of the manufacture of an injection molded article begins until a termination criterion is reached.
  • a possible termination criterion is the achievement of the qualitative, functional criteria of the injection molded article.
  • Another termination criterion can be irreparable deterioration of the injection molded article, so that the tool and / or the insert can be checked and replaced.
  • Fig. 1 shows a tool for a device according to the invention for
  • the tool 1 consists of a first tool half 2 and a second
  • Tool half 3 which can be separated from one another by the parting plane E.
  • the technological design of the tool 1 determines the number of necessary tool parts and the number of
  • Molding levels The necessary guides, fitting cones and ejector bolts, media supply for cooling and / or heating, electronic assemblies for heating, deburring tools, cutting tools for cutting off the filler channel are not shown in the figures.
  • the tool 1 has a first insert 5 and a second insert 5 '.
  • the inserts have 5.5 ‘a polymer.
  • a viewing window 4 is shown, which separates the second tool half 3 from an injection molding space 10 and from the insert 5 ', in particular pressure-tight.
  • the alignment marks 5m ‘of the insert 5 can be observed through the viewing window 4, in particular with an aligner (not shown), and can be adjusted by means of the positioning mechanism 6.
  • the pressure distributors 7 make it possible to cover the viewing window 4 and / or the back of the insert 5b 'with the alignment marks 5m' during the injection molding process in order to be able to maintain the operating pressure during injection molding up to, for example, 2500 bar overpressure without the injection molding compound, which is not shown, coming out of the tool 1, in particular in an uncontrolled manner, can escape.
  • the inserts 5, 5 ' are positioned with structured impression surface 5s, 5s' in the direction of the injection molding space 10 in the tool 1, in particular in the tool halves 2, 3 so that they can be aligned and adjusted.
  • the inserts 5, 5 'can have alignment marks 5m, 5m' both on the structured impression surface 5s, 5s 'and on the rear side of the insert 5b, 5b', in particular designed as a brand cluster, in order in particular to reference or correlate the impression surface 5s, 5s 'of the inserts 5.5' with the back 5b'5b 'of the inserts 5.5'.
  • the measurement does not necessarily take place in tool 1.
  • the rear side 5b, 5b of the insert 5.5 ‘can be machined to achieve flatness requirements, with the impression surface 5s, 5s of the insert 5.5 being able to be used without structuring.
  • the impression surface 5s, 5s ‘of the insert 5.5, regardless of the processing or machinability of the rear side 5b, 5b‘ of the insert 5.5, can be without structuring.
  • the tool 1 is filled in the filling opening 8 with the injection molding compound, not shown, so that it reaches the injection molding space 10 and in particular completely fills the cavities of the injection molding space 10.
  • in particular ventilation channels 9 are formed in the tool 1.
  • the insert 5 is shown symbolically without a viewing window.
  • channels are formed in the tool 1, in particular around the rear side 5b of the insert 5 with optical - 46 -
  • the pressure distributors 7 support the insert 5, 5 ⁇ in order to protect it against breakage due to overloading with the injection molding compound.
  • Overloads of the insert 5, 5 ' can include a thermal overload and mechanical overload, which can be avoided by force-free clamping and, in particular, full-surface support of the insert 5, 5' in the tool 1.

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

Abstract

L'invention concerne en particulier un dispositif de moulage par injection, en particulier de micro-moulage par injection, au moins un moule ayant une première moitié de moule et une seconde moitié de moule, la première moitié de moule et la seconde moitié de moule définissant une chambre de moulage par injection à l'état fermé du moule, le dispositif comprenant également un insert dans la chambre de moulage par injection.
EP20717142.2A 2020-04-01 2020-04-01 Dispositif et procédé de moulage par injection Pending EP4126496A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/059281 WO2021197599A1 (fr) 2020-04-01 2020-04-01 Dispositif et procédé de moulage par injection

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Publication Number Publication Date
EP4126496A1 true EP4126496A1 (fr) 2023-02-08

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EP20717142.2A Pending EP4126496A1 (fr) 2020-04-01 2020-04-01 Dispositif et procédé de moulage par injection

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US (1) US20230150180A1 (fr)
EP (1) EP4126496A1 (fr)
JP (1) JP2023532167A (fr)
KR (1) KR20220163368A (fr)
CN (1) CN115279571A (fr)
TW (1) TW202204125A (fr)
WO (1) WO2021197599A1 (fr)

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CN101053982B (zh) * 2006-04-14 2010-05-26 鸿富锦精密工业（深圳）有限公司 模具装置
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JP6338657B2 (ja) 2013-06-19 2018-06-06 エーファウ・グループ・エー・タルナー・ゲーエムベーハー インプリントリソグラフィーのためのインプリント材料
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TW202204125A (zh) 2022-02-01
US20230150180A1 (en) 2023-05-18

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