EP3328608A1 - Machine de moulage par injection équipée d'un moule à étages pour des applications d'estampage par injection et procédé d'estampage par injection - Google Patents

Machine de moulage par injection équipée d'un moule à étages pour des applications d'estampage par injection et procédé d'estampage par injection

Info

Publication number
EP3328608A1
EP3328608A1 EP16747479.0A EP16747479A EP3328608A1 EP 3328608 A1 EP3328608 A1 EP 3328608A1 EP 16747479 A EP16747479 A EP 16747479A EP 3328608 A1 EP3328608 A1 EP 3328608A1
Authority
EP
European Patent Office
Prior art keywords
snorkel
nozzle
injection
injection unit
stroke
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Withdrawn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
EP16747479.0A
Other languages
German (de)
English (en)
Inventor
Jean-Luc Grange
Thomas Iten
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.)
Netstal Maschinen AG
Original Assignee
Netstal Maschinen AG
Maschinenfabrik und Giesserei Netstal AG
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 Netstal Maschinen AG, Maschinenfabrik und Giesserei Netstal AG filed Critical Netstal Maschinen AG
Publication of EP3328608A1 publication Critical patent/EP3328608A1/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Withdrawn legal-status Critical Current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
    • B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
    • B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/12—Injection moulding apparatus using two or more fixed moulds, e.g. in tandem
    • 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
    • B29C45/1777—Nozzle touch mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B29C2045/5615—Compression stroke, e.g. length thereof

Definitions

  • the invention relates to an injection molding machine with a stack mold.
  • Stacking tools and injection molding machines with stack molds are known in various embodiments from the prior art.
  • a stack mold usually consists of several tool parts, namely:
  • a tool part which is mounted on the movable platen of the injection molding machine, hereinafter also referred to as moving stack tool part;
  • One or more middle parts which are arranged between the fixed and the movable stack tool part.
  • middle parts Depending on the number of middle parts thus result stacking tools with two or more floors.
  • one or more mold cavities are formed in the closed state of the stack mold, into which melt is introduced and solidified into a molded part.
  • the middle plates are provided with suitable melt distribution channels.
  • melt distribution channels For the supply of melt from the injection unit of the injection molding machine in the middle plate or in the middle plates, various measures from the prior art are known.
  • WO2014 / 153676A1 it is known to supply the melt via a supply line lying on the central injection axis to the melt distribution system in the middle plate.
  • the supply line comprises at least two telescopically displaceable pipe sections. There are no valves necessary, which would have to close the supply lines when opening the stack tool.
  • JP-Y-62-18418 an injection molding machine with a stack mold is known in which the injection unit can be moved by means of a piston-cylinder unit relative to the stationary stack tool part.
  • JP-Y-62-18418 is mentioned in EP0576837B1 as prior art and is described there as follows.
  • the injection unit is connected via an elongated injection cylinder, which extends through a passage opening of the stationary stack tool part, with the central part, in which a mouthpiece of the injection cylinder is pressed against a connection opening of the central part.
  • the contact pressure of the mouthpiece can be specified by means of the piston-cylinder unit.
  • the injection unit with the central part of the stack mold forms a unit which is not disconnected even during the opening and closing movement of the stack mold.
  • EP0576837B1 it is proposed to connect the injection unit directly to the central part.
  • a direct mechanical connection of the injection unit and central part of the stack mold is proposed.
  • the middle part of the stack mold on its the fixed platen side facing a projecting rohrmundigen connecting piece, which commonly referred to as a snorkel NET will.
  • the fixed platen and the stationary stack tool part each have a central opening into which the snorkel can protrude, under certain circumstances also to the extent that with the stack mold closed, the connection opening projects beyond the rear side of the fixed platen.
  • the injection unit can be axially displaced to press the mouthpiece of the injection cylinder against a connection opening of the snorkel, so that an outwardly sealed coupling of the injection cylinder is made to the central part of the stack mold.
  • the piston rods of the hydraulic actuating cylinders are passed through openings in the fixed platen and anchored to the central part of the floor mold.
  • This attachment of the injection unit to the central part ensures that the coupling of the mouthpiece to the connection opening of the snorkel is maintained unchanged during the entire injection molding process and over many injection cycles, including the mold closing and mold opening movements.
  • the connection of central part and injection unit can be made via screws.
  • injection molding is known in various embodiments from the prior art and therefore need not be described in detail at this point.
  • gasoline embossing with stack molds it is important that the mouthpiece or the nozzle of the injection unit is pressed against the snorkel to be able to inject, although the snorkel moves during the embossing movement in the direction of the injection unit.
  • the contact pressure on the snorkel should be as constant as possible during the embossing process. Excessive stress on the snorkel could damage it NET or the middle part of the floor tool could experience a positional deviation.
  • the present invention seeks to provide a further injection molding machine with stack tool, which is suitable for injection compression molding.
  • the injection unit at least during the injection process, in particular during an injection process before and / or during the
  • displaceable part executable stroke are set or adjustable so that the nozzle and the snorkel remain pressed together during the injection process, the injection unit, in contrast to the aforementioned state of the NET
  • the position of the mechanical stops in the machine longitudinal direction should be changeable or adjustable.
  • a clamping half-shell can be provided or countered, screwable attacks. These attacks can, for example, on the piston rods of a hydraulic linear drive for the method of
  • annular stop element surrounding the nozzle or the injection unit.
  • stop bolts which are arranged on a circle around the injection unit around.
  • one or more stops are provided on the machine bed, on which the one or more guide shoes of the
  • Injection unit can be determined by a mechanical blockade of its linear drive at a position in the machine longitudinal direction or is determined. In a hydraulic linear drive, this could be achieved by a hydraulic blockage of the pressure medium spaces. In an electric linear drive could NET a brake may be provided, which is a driven by the electric motor
  • the injection unit can be detected or determined by controlling the driving force of its linear drive at a position in the machine longitudinal direction.
  • a counterforce is exerted on the injection unit, which is seen over a Spritzg automatzyklus, changeable.
  • the force with which the snorkel of the floor mold presses on the nozzle must be considered. This force depends on the position of the stack tool parts. When closing the stack tool, this force increases. In addition, the force to be considered when injecting the melt into the
  • the snorkel may be configured to have a first snorkel part in communication with a central part and a relative thereto
  • Snorkel part has. These two snorkel parts are telescopically slidable, such that a running through both snorkel parts,
  • the second snorkel part is preferably opposite to the first
  • the snorkel stroke should be designed according to a certain embossing stroke of the stack tool.
  • This snorkel stroke should be dimensioned such that it corresponds at least to the embossing stroke of the stack mold.
  • the embossing stroke of the stack mold depends on the molded part to be produced. So he can vary from molding to molding. But it can also happen that for one and NET the same molding different Regehübe be driven depending on the set injection molding process.
  • a nozzle closure mechanism can be provided, which seals on the side for plasticizing.
  • a so-called needle valve is the predominant nozzle closure mechanism.
  • the melt can pass from there freely until the tool is reached.
  • Nozzle needles may be provided in the tool which block or release the path of the melt into the cavities. Between these two closures no additional closure member must be provided. Incidentally, the nozzle will rarely lift off the snorkel in normal operation. If this occurs, leakage from the snorkel and, to a lesser extent, leakage from the nozzle may occur. If, however, a separation of the two parts is to take place, a screw retraction can preferably be run before separation, i. The screw is moved back by a certain stroke, so that the melt in the hot runner and in the nozzle tip is decompressed. This can reduce the leakage.
  • melt channels Components of the injection molding machine, hereafter also called melt channels are designed so that as little as possible shear energy is produced, because this would damage the plastic.
  • melt channels which are also referred to as hot runners or as a hot runner manifold. Likewise, there are nozzles at the transition from the hot runners to the cavities in the stack molds.
  • the melt channel in the snorkel is designed to be relatively generous in terms of rheology.
  • the snorkel can be heated over its entire length or on sections. That's why the snorkel can also be called a hot-channel.
  • the melt stream in distribution channels is divided into individual streams and up to those lying in the vicinity of the cavities
  • Transported tool nozzles Such distribution channels are often referred to as hot runner manifold.
  • the nozzle in front of the cavity is also heated, so that the plastic melt waiting for a shot in the nozzle antechamber does not solidify.
  • the heating preferably takes place via resistance heaters at suitable regions of the melt channels.
  • heating bands can be provided. This applies in particular to the plasticizing cylinder, the nozzle on the plasticizing and the snorkel.
  • so-called thick film heaters can be provided.
  • Figure 2 as Figure 1, but with stack tool in position for embossing stroke H P ;
  • Figure 5 shows an embodiment of a snorkel with a prestressed
  • FIG. 6 shows the contact force between the nozzle of the plasticization and the prestressed, displaceable element of the snorkel over an injection molding cycle
  • FIG. 7 shows an embodiment of a nozzle with a prestressed element.
  • a first embodiment of an injection molding machine according to the invention and its operation in injection-compression molding will be described in more detail below with reference to FIGS. 1 to 3.
  • Such an injection molding machine for injection-compression molding with a stack mold comprises a machine in denbett 1, on which an injection unit 2, a fixed platen 3, a movable platen 4 and a support plate 5 are arranged.
  • the injection unit generally designated by the reference numeral 2, essentially comprises a cylinder 2a with a rotatable and linearly driven screw therein for plasticizing and discharging melt, a drive unit 2b with a linear drive for moving the screw in the machine longitudinal direction and a rotary drive for rotatably driving the screw , At the front end of the cylinder 2a, a nozzle 1 1 is arranged, via the melt during a forward movement of the
  • Screw can be ejected from the cylinder 2a and injected into an injection mold.
  • the injection mold is designed as a floor mold 6 and comprises three tool parts with which two floors can be formed.
  • the middle part 6b of the stack mold 6 is supported by guide rails 7, which are mounted on the machine bed 1. However, the middle part 6b can also be supported and guided on columns (not shown here). Also one
  • actuatable toggle mechanism 8 may be provided, which is only indicated in the figure 1. Injection molding machines with a toggle mechanism are known, so that further details of the toggle mechanism and its drive need not be described at this point.
  • Middle part 6b via a mechanical connection to at least the closing-side tool part 6a.
  • entrainment of the center piece 6b by toggle or racks.
  • the entrainment of the center piece 6b takes place by means of racks 9a and 9b, which are in engagement with a toothed wheel 10 attached to the center piece 6b.
  • racks 9a and 9b which are in engagement with a toothed wheel 10 attached to the center piece 6b.
  • the center piece 6b and the movable stack tool part 6c move during the tool opening in the direction of the support plate 5.
  • a not shown sprue and distributor system is integrated, via which melt can be distributed in the working levels or floors of the stack tool to thus to supply the mold cavities formed in the floors with melt.
  • the snorkel 12 makes during movement of the floor mold 6, the movement of the central part 6 b, which can cause the snorkel 12 lifts from the nozzle 1 1.
  • the snorkel 12 protrudes at least into the recess of the
  • the snorkel 12 is provided to the nozzle 1 1 out with a biased, displaceable element.
  • the construction of such a snorkel 12 is shown in more detail in FIG. Due to the
  • a flange 12b is connected to the snorkel body 12a which is connected to the central part 16b and contains a melt channel 13a.
  • An extension 12c for the nozzle 1 1 is on the one hand displaceably guided in the flange 12b and on two connected to the flange 12b screws 14a, 14b, on the other hand serve the screws 14a, 14b as captive.
  • Flange 12b and lug 12c are biased against each other, either by a spring, such as an annular spring 15, or by a plurality of individual, arranged on a bolt circle springs.
  • first snorkel portion 16a which is presently formed by the snorkel body 12a and the flange 12b, and a relative to this displaceable and the nozzle 1 1 of the injection unit 2 facing second snorkel portion 16b, which in this case of the Extension 12c is formed.
  • the two snorkel parts 16a and 16b are telescopically slidable, such that there is a continuous melt channel 13 extending through both snorkel parts 16a, 16b with sections 13a, 13b and 13c.
  • the second snorkel part 16b is biased in the direction of the nozzle 1 1 relative to the first snorkel part 16a and displaceable by a snorkel stroke H s relative to the first snorkelling part 16a, the snorkel stroke H s being designed in accordance with a specific embossing stroke H P of the stack mold 6 and is dimensioned such that it at least this embossing stroke of
  • snorkel body 12a and flange 12b could also be made in one piece having an end portion suitably configured to cooperate with a mating hub 12c.
  • the prestressed, displaceable element can also be integrated into the nozzle.
  • the construction of such a nozzle equipped with a prestressed, displaceable element is shown in more detail in FIG. It is only one
  • the second nozzle part 1 1 b is displaceably guided in the first nozzle part 1 1 a and on two connected to the first nozzle part 1 1 a screws 14a, 14b.
  • the screws 14a, 14b also serve as captive.
  • the two nozzle parts 1 1 a and 1 1 b are biased against each other, either by a spring, such as a ring spring 15, or by a plurality of individual, arranged on a bolt circle springs.
  • the two nozzle parts 1 1 1 a and 1 1 b are telescopically displaced into each other by a stroke H D , so that a continuous melt channel 21 is maintained at any movement.
  • the nozzle stroke H D is based on the embossing stroke H P of the stack mold 6 and corresponds at least to this, that is, H D ⁇ H P. It is advantageous if the nozzle 1 1 conical towards the snorkel, as in the figure 7 is shown. As a result, a force acts in the direction of the snorkel and increases the pressure.
  • FIG. 7 shows only one example of an embodiment of the prestressed, displaceable nozzle, other embodiments, for example by
  • the prestressed element may be arranged biased in the nozzle in the direction of the cylinder head.
  • the prestressed element in the cylinder head is arranged biased in the direction of the nozzle.
  • the cylinder head is presently the nozzle 1 1 facing the front end of the cylinder to understand 2a.
  • the injection unit 2 presses on the nozzle 1 1 of the plasticization 2a on the snorkel 12 of the stack mold 6.
  • the nozzle 1 When injecting with comparatively high pressures, for example with pressures of over 1500 bar and in particular at pressures of over 2000 bar, the nozzle 1 would lift 1 and thus the injection unit 2 of the snorkel 12, they would not be pressed against the snorkel 12, since the melt stream in the tool experiences a resistance.
  • the nozzle 11 or the injection unit 2 must not lift off the snorkel 12 during the injection.
  • the stack mold 6 is not completely closed when starting the injection, but is open to the so-called embossing stroke.
  • a hydraulic linear drive is provided for moving the injection unit 2 and for pressing the nozzle 11 onto the snorkel 12, comprising a pressure cylinder 18 and a piston rod 17 connected to the fixed platen 3.
  • a pressure cylinder 18 and a piston rod 17 are symmetrical to the central machine longitudinal axis lying hydraulic
  • a mechanical stop 19 is attached on the piston rod 17 of the pressing cylinder 18, which is attached to the drive unit 2b. This stop can be formed from clamping shells or it can countered, screwable attacks are used. Usually two pressing cylinders 18 are provided on both sides of the machine longitudinal axis. In this case, a mechanical stop 19 may be provided on one of the piston rods. But it can also be provided on each of the two piston rods a stop.
  • the mechanical stop is in the example shown here to the
  • Piston rods 17 of the Anpresszylinders 18 attached can also be set to other positions on the machine.
  • a ring can be placed, which is supported on the fixed platen 3.
  • one or more other suitable stops at the front end of the injection unit, which can be supported on the fixed platen.
  • a plurality of stop bolts could be provided, which are arranged on a circle around the injection unit 2 around and on the fixed
  • Guide rails 20 of the injection unit 2 stops are attached to the or the guide shoes of the injection unit 2, not shown here abut.
  • the mechanical stop or stops 19 must be made positionally adjustable for the machine operator. An operator is thereby given the opportunity for a particular embossing stroke H P of the stack tool for this purpose adjust appropriate position of the stop or stops to determine the injection unit 2 at this position.
  • the injection unit 2 moves at the beginning of a cycle or at the start of production with a certain force on the mechanical stop 19 and presses against this. Subsequently or during this, the stack mold 6 moves up to the injection embossing gap or embossing stroke H P. Just before the tool parts 6a, 6b and 6c of the stack mold 6 have reached the position for the embossing stroke H P when approaching, snorkel 12 and nozzle 1 1 touch each other. As a result of the further closing on the injection embossing gap or on the embossing stroke H P , the spring 15 is slightly compressed in the pretensioned, displaceable element (attachment piece 12 c) and the attachment piece 12 c presses against the nozzle 1 1 with a small force.
  • the injection unit 2 can lift off with its nozzle 1 1 again from the snorkel 12 and be moved away from the stop 19 backwards. But it is also possible that the injection unit 2 is kept pressed against the mechanical stop 19 permanently.
  • the preloaded displaceable element such as the endpiece 12c is continuously filled by the horrötechnischshub at the stop 19th Pressed unit cyclically relieved. Also, the mechanical stop 19 experiences the full force of the injection unit 2 only when the snorkel 12 is lifted from the nozzle 1 1.
  • Lowering pressure cylinder 18 It is advisable to tie the relief of the pressure in the pressure cylinder 18 on whether snorkel 12 and nozzle 1 1 have contact. If there is no contact, the pressure cylinder 18 can be pressure relieved.
  • FIG. 4 shows an alternative to the first embodiment shown in FIGS. Instead of a mechanical stop, a specific position can also be held by a control technology implementation or by a brake in the linear drive of the injection unit. The course of the
  • the injection-compression cycle is similar to the injection-compression cycle described above.
  • Injection unit 2 moves to a certain position without hitting a stop. This position results from the embossing stroke H P of the stack mold 6 and the compression of the biased displaceable element 12 c at the snorkel 12. In the selected position, the nozzle 1 1 meets the prestressed, displaceable element (extension 12 c) on the snorkel 12. While the stack mold 6 performs the embossing stroke H P , the injection unit 2 is held at the previously approached position. The biased displaceable element 12c on the snorkel 12 is moved by the tool stroke H P
  • the injection unit 2 can leave the previously approached position and be moved in the direction of a rear end position. But it is also possible that the injection unit 2 remains for several cycles at the desired position and is held there. A lifting of the nozzle 1 1 of the snorkel 12 is also carried out when the injection unit 2 stops in its place, since the snorkel 12 the
  • Tool opening stroke moves along.
  • the holding of the sp tzaggregats 2 at the predetermined, desired position can be done in various ways.
  • Both in an electric and in a hydraulic linear drive can be a force-controlled holding the position.
  • an electric spindle drive can be provided as a linear drive for moving the injection unit 2.
  • the inverter can control the servo motor of the spindle drive so that a position control of the injection unit 2 takes place and this is thus held in the predetermined, desired position.
  • a brake in the electric or hydraulic linear drive can be provided.
  • Linear actuator is held by means of a hydraulic blocking of the pressure medium spaces of the pressure cylinder in position.
  • Figure 6 illustrates the contact force between the nozzle 1 1 and the
  • the heating is preferably via Resistance heaters at appropriate areas of the melt channels.
  • heating bands can be provided.
  • the snorkel 12 is preferably heated in the range of 12a and 12b, since the geometries are made simple, so that a heating tape can be placed around the cylindrical parts.
  • the area 12c does not need to be additionally heated because the width of this section is small. But it would also be possible to heat only the area 12a and not to heat 12b and 12c, but possibly to isolate 12b, depending on how the accessibility of the parts must be.
  • the procedure for the nozzle is similar to the snorkel.
  • the region 1 1 a is heated, but not the region 1 1 b.

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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 une machine de moulage par injection équipé d'un moule à étages (6) pourvu d'un tube (12) qui permet d'amener une matière en fusion dans une partie médiane (6b) du moule à étages. Le tube (12) et la buse (11) de l'unité d'injection (2) peuvent être pressés l'un contre l'autre. Selon l'invention, pendant le processus d'injection, en particulier lors d'un processus d'injection avant et/ou au cours de la réalisation d'une course d'estampage (HP) du moule à étages (6), l'unité d'injection (2) peut être fixée, lorsqu'elle est vue dans la direction longitudinale de la machine, à une position dans laquelle la buse (11) de l'unité d'injection (2) est pressée sur une partie coulissante précontrainte (12c) du tube (12) ou dans laquelle le tube (12) est pressé contre une partie coulissante précontrainte (11b) de la buse (11) lorsque l'outil à étages (6) se trouve dans une position de réalisation d'une course d'estampage (HP). La précontrainte de la partie coulissante et la course (HS, HD) de celle-ci sont telles que la buse (11) et le tube (12) restent pressés l'un contre l'autre pendant le processus d'injection.
EP16747479.0A 2015-07-30 2016-07-28 Machine de moulage par injection équipée d'un moule à étages pour des applications d'estampage par injection et procédé d'estampage par injection Withdrawn EP3328608A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015112508.0A DE102015112508A1 (de) 2015-07-30 2015-07-30 Spritzgießmaschine mit Etagenwerkzeug für Spritzprägeanwendungen
PCT/EP2016/067986 WO2017017175A1 (fr) 2015-07-30 2016-07-28 Machine de moulage par injection équipée d'un moule à étages pour des applications d'estampage par injection et procédé d'estampage par injection

Publications (1)

Publication Number Publication Date
EP3328608A1 true EP3328608A1 (fr) 2018-06-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16747479.0A Withdrawn EP3328608A1 (fr) 2015-07-30 2016-07-28 Machine de moulage par injection équipée d'un moule à étages pour des applications d'estampage par injection et procédé d'estampage par injection

Country Status (5)

Country Link
US (1) US20180222099A1 (fr)
EP (1) EP3328608A1 (fr)
CN (1) CN107921683A (fr)
DE (2) DE102015112508A1 (fr)
WO (1) WO2017017175A1 (fr)

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Publication number Priority date Publication date Assignee Title
US11148330B2 (en) * 2017-01-25 2021-10-19 Lotes Co., Ltd Injection molding machine device
AT520325B1 (de) 2018-03-07 2019-03-15 Engel Austria Gmbh Formgebungsmaschine
CN109130079A (zh) * 2018-06-28 2019-01-04 芜湖中科智捷信息科技有限责任公司 一种高效的伺服节能注塑机

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WO2017017175A1 (fr) 2017-02-02
DE102015112508A1 (de) 2017-02-02
US20180222099A1 (en) 2018-08-09
CN107921683A (zh) 2018-04-17
DE202016104165U1 (de) 2016-11-14

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