EP3148765A1 - Dispositif et procédé de moulage par injection de fibre de pièces moulées par injection - Google Patents

Dispositif et procédé de moulage par injection de fibre de pièces moulées par injection

Info

Publication number
EP3148765A1
EP3148765A1 EP15724705.7A EP15724705A EP3148765A1 EP 3148765 A1 EP3148765 A1 EP 3148765A1 EP 15724705 A EP15724705 A EP 15724705A EP 3148765 A1 EP3148765 A1 EP 3148765A1
Authority
EP
European Patent Office
Prior art keywords
actuator
housing wall
injection mold
injection
wall portion
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Withdrawn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
EP15724705.7A
Other languages
German (de)
English (en)
Inventor
Gerald Roman BERGER
Franz BEVC
Christian Johann BODOR
Walter Friesenbichler
Alexander PETSCHNIG
Werner Schadler
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.)
Montanuniversitaet Leoben
Polymer Competence Center Leoben GmbH
Mahle International GmbH
Original Assignee
Montanuniversitaet Leoben
Polymer Competence Center Leoben GmbH
Mahle International 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
Priority claimed from DE102014210295.2A external-priority patent/DE102014210295A1/de
Priority claimed from DE102014210296.0A external-priority patent/DE102014210296A1/de
Application filed by Montanuniversitaet Leoben, Polymer Competence Center Leoben GmbH, Mahle International GmbH filed Critical Montanuniversitaet Leoben
Publication of EP3148765A1 publication Critical patent/EP3148765A1/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Withdrawn legal-status Critical Current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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0031—Movable mould wall parts in contact with weld lines, e.g. rotating pins for stirring the weld line
    • 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
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0039—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks intermixing the injected material front at the weld line, e.g. by applying vibrations to the melt front
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part
    • 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
    • B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
    • 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
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts

Definitions

  • the invention relates to an apparatus and a method for fiber injection molding of injection molded parts.
  • Injection molding is a primary molding process in which the plastic to be processed is liquefied in an injection molding machine and then injected under pressure into an injection mold. Injection is typically followed by controlled cooling whereby the plastic solidifies so that it can be removed from the injection mold as a finished part.
  • DE 39 34 1 15 A1 describes an injection mold for injection molding for injection molded parts of plasticizable liquid crystal polymers.
  • the injection mold comprises at least two sprue bores, to each of which a plasticizing and injection unit is assigned.
  • the injection mold has a Bankkanalblock with at least two holes, each with a bore is in fluid connection with a sprue. Both holes open into a respective associated plasticizing and injection unit associated further bore. Between these gate bores and the further bores, an arrangement of one-way valves is arranged, so that the plasticized thermoplastic material alternately flows from one of the two plasticizing and injection units into the respective other aggregate.
  • a special variant of injection molding is the injection molding of short- and long-fiber reinforced plastics, the so-called fiber injection molding Fiber injection molding are under the principle application of the above-mentioned injection molding plastic plastics from a thermoplastic by means of suitable fiber materials - known from the prior art as glass, carbon, natural or aramid fibers - reinforced.
  • Problematic in injection molding prove to be occurring during injection of the plastic in the injection mold, from a flow perspective complex flow patterns, especially in injection molds with complex shape geometry, as they increasingly occur in the production of modern injection molded parts.
  • Such complicated geometric shapes often with a plurality of apertures and recesses, can lead to a division of the flow fronts of the propagating in the injection mold plastic.
  • flow and weld lines are formed, which are reduced in strength over the remaining areas. The same applies if the plastic melt is introduced into the injection mold via two or more inlet openings and the respective melts meet within the injection mold.
  • JP 04-415 6322 A describes an injection mold with an actuator which is forced back under the pressure of the plastic melt introduced into the injection mold.
  • a further concept followed JP 1 1 -070 541, in which two actuators are provided on opposite housing walls of the Spritzg cordfornn. These are alternately moved in the orthogonal direction to the housing wall into the Spritzg cordfornn in and out again, whereby the plastic melt is quasi "stirred", which leads to improved alignment of the fibers in the plastic.
  • the basic idea of the invention is accordingly to provide a device for fiber injection molding of injection-molded parts with at least one movable element which generates turbulence and / or transverse flows in the plastic melt spreading in the casting mold.
  • a targeted influencing of the volume flow of the plastic especially in the critical Bindenaht Scheme be achieved.
  • a strength-reducing orientation of the fibers in the thermoplastic can be largely or even completely avoided in this way.
  • the device presented here imparts to the finished injection-molded parts a homogeneous strength, which in particular includes the critical region of the said weld lines.
  • a device comprises a first and a second housing wall section comprising an injection mold in which a first and a second inlet are provided, through which liquid plastic can be introduced into an interior of the injection mold.
  • the two inlets may be in fluid communication with one or more injection units known to those skilled in the art. It is understood that the injection mold can not only have a simple geometric shape, such as in the manner of a hollow cylinder, but also more complex geometries are possible, such as when injection molded parts are to be produced with openings, recesses or other geometric features.
  • a first passage opening is provided, which is bordered on a side facing away from the interior side of a first actuatordale.
  • a first actuator element is arranged to be movable, which serves to generate the above-described turbulence in the introduced into the injection mold liquid thermoplastics.
  • Essential to the invention is now the geometric arrangement of the first receiving element relative to the injection mold, which projects outwardly away from the first housing wall portion.
  • Computer-aided simulation calculations have shown that the adjustment of the two actuator elements during the injection of the plastic into the injection moldings leads to particularly advantageous turbulence and / or transverse flows in the plastic melt, by which an unfavorable orientation of the individual fibers in the plastic can be suppressed particularly effectively. This results in the production of the desired homogeneous strength moldings, and in particular without localized areas of reduced strength.
  • first and second housing wall portions may face each other.
  • a concomitant arrangement of the two rotatable wall elements in opposite housing walls of the injection mold generates flow patterns in the plastic material, which result in a particularly homogeneous strength of the plastic which has been transferred to the solid state after cooling by injection.
  • the two housing wall sections may be provided adjacent to each other in the same housing wall. In this way, the space required for the device can be reduced.
  • the first actuator receiving element protrudes obliquely from the first housing wall in a longitudinal section of the device and the second housing wall section projects in an analogous manner obliquely from the second housing wall section.
  • the term "oblique" in the present context expressly includes all embodiments in which the direction of movement of the actuator receiving element extends obliquely to a direction of extension of the interior of the injection molded part.
  • the direction of extension can be defined by a connecting virtual straight line for the two inlets.
  • the two actuator receiving elements can also be arranged on said housings such that they protrude at a right angle from the respective housing wall sections. In this case, reduces the cost of manufacturing the injection molding tool, resulting in cost advantages.
  • the actuator elements which are adjustably mounted in the respective actuator receiving element are designed such that they act as turbulence generators on the plastic introduced into the interior.
  • the above-presented, inventive arrangement of the actuator-receiving elements on opposite mold walls of the injection mold and - with respect to the direction of extension of said injection mold - oblique arrangement generates flow patterns in the plastic, which cause a particularly homogeneous strength of the cured after injection plastic.
  • An improved fiber orientation in the plastic can be achieved by providing the device with a tempering device, by means of which the temperature of the plastic introduced into the injection mold can be varied.
  • a tempering device permits, in particular, a locally variothermic process control in the area of the weld line.
  • the term "variothermic process control” is understood to mean a cyclical heating of the injection molding tool and in particular of the injection mold during the injection of the liquid plastic so that its temperature oscillates between its melting and demolding temperatures, which are specified for the material
  • no separate cooling device is required in order to cool the injection mold again, but rather, in such a scenario, the desired response is achieved. Düstechnik the temperature already effected by switching off the heater.
  • the desired temperature can be realized by integration of an oil circuit in the injection mold, so that then the desired temperature in the injection mold is achieved by thermal interaction with the oil acting equally as heating and cooling agent.
  • the actuator-receiving elements can be formed in the manner of receiving tubes.
  • a variety of design options opens up for the person skilled in the art within the scope of development, in particular with regard to the attachment of the receiving tubes to the injection mold.
  • said receiving tubes can also be integrally formed on the injection mold.
  • the first receiving tube extends along a first tube direction and the second receiving tube along a second tube direction.
  • the arrangement of the two receiving tubes relative to the direction of extension of the injection mold proves such that the first and the second pipe direction in a longitudinal section of the device each form an acute angle, in particular an angle between 10 ° and 45 °, with the extension direction.
  • the oblique arrangement of the two receiving tubes need not be limited to the said preferred angular range; Rather, embodiments are conceivable in which the said angle interval above the limiting angle of 45 ° is exceeded. In general, all acute angles ⁇ 90 ° are possible.
  • the two receiving tubes can each have a circular or oval or polygonal profile in a cross section defined orthogonally to the respective tube direction. While With a circular or oval profile, they are relatively simple and therefore cost-effective to manufacture, an embodiment with a polygonal profile results in an improved mixing effect in the liquid plastic. In principle, the desired mixing increases with increasing number of profile corners.
  • the use of stamp-like trained actuator elements which can be slidably mounted within the receiving tubes, lends itself.
  • an embodiment of the two actuator elements in the respective actuator receiving element is particularly recommended such that they are each adjustable between a first position, in which they partially project into the injection mold, and a second position, in which are arranged completely in the actuator receiving element ,
  • the concomitant displacement of the plastic introduced into the mold favors the formation of turbulent flows.
  • eddy currents can be generated in the device according to the invention by the two actuator elements with a Coupling device to be equipped. This causes a coupling of the two elements in such a way that an adjustment of the first actuator element from the first to the second position is accompanied by an adjustment of the second actuator element to the first position and vice versa. If such a coupling device is used, then exactly one of the two actuator elements is arranged alternately within the injection mold. Due to the forcibly resulting reciprocating movement of the two actuator elements and the associated alternating volume displacement of not yet solidified plastic within the injection mold, a flow pattern is generated in the plastic melt, which shows the properties of an eddy current.
  • the two actuator elements each comprise an electric drive unit, i. the actuator elements are realized in the manner known to those skilled electric, hydraulic or pneumatic actuators.
  • the actuator is electrically controlled in order to realize specific different movement modes for the actuator.
  • the coupling device may be equipped with a conventional control unit, which cooperates with the drive units for adjusting the position of the actuator elements between the first and the second position.
  • the invention further relates to methods of fiber injection molding injection molded parts in a device having one or more of the foregoing features.
  • the two actuator elements are substantially the same in each case between the first position, in which they partially in the injection molding. protrude mold, and the second position, in which completely arranged in the actuator-receiving element, reciprocated.
  • the temperature of the injection mold is cyclically varied by means of a tempering during injection of the plastic between an upper and a lower limit temperature, in particular such that the temperature of the plastic varies cyclically between its melting temperature and its Entformungstem- temperature.
  • a device for fiber injection molding of injection-molded parts comprises, according to a second aspect of the invention, an injection mold comprising a first and a second housing wall section.
  • a first and a second inlet for introducing a plastic into an interior of the injection mold are provided, and this interior is bounded by the two housing wall sections.
  • a first passage opening is provided, which is closed by an adjustable first wall element.
  • the first wall element is designed to be rotatable relative to the first housing wall section. Essential to the invention of the device presented here is thus the Drehversteilberry a first passage opening closing the first wall element relative to the first housing wall portion in which the passage opening is provided.
  • a second through-opening may also be provided in the second housing wall section, which is closed by a correspondingly adjustable second wall element.
  • the second wall element is rotatable relative to the second housing wall portion.
  • first and second housing wall portions may face each other.
  • a concomitant arrangement of the two rotatable wall elements in opposite housing walls of the injection mold generates flow patterns in the plastic, which cause a particularly homogeneous strength of the transferred after cooling by cooling in the solid state plastic.
  • the two housing wall sections may be provided adjacent to each other in the same housing wall. In this way, the space required for the device can be reduced.
  • first wall element is rotatable about a first axis of rotation is, which is orthogonal to a defined by the first housing wall portion in the region of the first passage opening first wall plane.
  • second wall element if present, is rotatable about a second axis of rotation which is orthogonal to a second wall plane defined by the second housing wall section in the region of the second passage opening.
  • An improved homogenization of the strength in the plastic formed in the injection mold can be achieved by the first wall element flush with the first housing wall portion and / or the second wall element is flush with the second housing wall portion.
  • transverse flows in the plastic injected into the injection mold can be achieved in the area of the weld line by providing the two inlets on opposite end housing walls, so that an extension direction of the interior is defined by a virtual connecting straight line between the two end housing walls.
  • the first and the second passage openings are then arranged offset relative to one another in the first or second housing wall section with respect to the extension direction.
  • the first passage opening is bordered on a side facing away from the interior side of the first housing wall portion of a first actuator-receiving element, which protrudes away from the first housing wall portion.
  • a first actuator element comprising the first wall element
  • the second passage opening can also be located on a side of the second housing facing away from the interior. sewandabterrorisms be bordered by a second actuator-receiving element, which protrudes away from the second housing wall portion.
  • a second actuator element comprising the second wall element can be arranged.
  • the first actuator element can be arranged linearly adjustable in the first actuator receiving element and / or the second actuator element linearly adjustable in the second actuator receiving element.
  • the associated combined linear and rotary movement of the actuator elements comprising the wall elements generates particularly pronounced transverse and turbulence flows in the liquid plastic introduced into the injection mold in the region of the weld line forming between the two plastic streams.
  • the first actuator element is designed to be linearly adjustable along a first adjustment axis defined by the first axis of rotation and / or the second actuator element is designed to be linearly adjustable along a second adjustment direction defined by the second axis of rotation.
  • the actuator-receiving elements can be formed in the manner of receiving tubes.
  • the person skilled in the art offers a variety of design options, in particular with regard to the attachment of the receiving tubes to the injection mold.
  • said receiving tubes also be formed integrally on the injection mold.
  • the first receiving tube extend along a first tube direction and / or the second receiving tube along a second tube direction.
  • the arrangement of the receiving tubes relative to the direction of extension of the injection mold proves to be particularly advantageous such that the first or second tube direction forms an acute angle or a right angle, in the former case preferably between 10 ° and 45 °, with the direction of extent in a longitudinal section of the device ,
  • actuator elements various options also open up for the person skilled in the art.
  • stamp-like trained actuator elements which can be slidably mounted within the receiving tubes
  • an embodiment of the actuator element in the actuator receiving element is particularly recommended such that it is adjustable in each case between a first position, in which it protrudes partially into the injection mold, and a second position in which it is arranged completely in the actuator receiving element.
  • the concomitant displacement of the plastic introduced into the mold favors the formation of turbulent flows.
  • eddy currents can be generated in the device according to the invention by the two actuator elements are equipped with a coupling device, which is a coupling of the two Elements effected in such a way that with an adjustment of the first actuator element from the first to the second position, an adjustment of the second actuator element in the first position is accompanied and vice versa. If such a coupling device is used, then exactly one of the two actuator elements is arranged alternately within the injection mold. By forcibly resulting reciprocating movement of the two actuator elements and the associated alternating volume displacement of not yet solidified plastic within the injection mold, a flow pattern can be generated in the plastic melt, which shows the properties of an eddy current.
  • the two actuator elements each comprise an electric drive unit, i. the actuator elements are realized in the manner known to those skilled electric actuators.
  • the coupling device can be equipped with a conventional control unit, which cooperates with the drive units for adjusting the position of the actuator between the first and the second position.
  • the device is equipped with a tempering device, by means of which the temperature of the plastic introduced into the injection mold can be varied.
  • a tempering device allows, in particular, a locally variothermic process control in the area of the weld line.
  • the term "variable-temperature process control” is understood to mean cyclical heating of the injection molding tool and in particular of the injection mold during the injection of the liquid plastic, so that the temperature of which oscillates between its melting and demolding temperatures, which are specified in terms of material.
  • the temperature control device may comprise a heating device, for example in the form of an electrical resistance heater, for heating the injection mold.
  • the desired temperature can be realized by integration of an oil circuit in the injection mold, so that then the desired temperature in the injection mold is achieved by thermal interaction with the oil acting equally as heating and cooling agent.
  • the invention further relates to methods of fiber injection molding injection molded parts in a device having one or more of the foregoing features.
  • the method during the injection of plastic into the injection mold, at least the first wall element is rotated relative to the first housing wall section.
  • optionally existing, extended wall elements in particular a second wall element provided in the second housing wall section.
  • FIG. 1 shows an example of a device according to the first aspect of the invention in a longitudinal section along an extension direction
  • FIG. 3 shows an example of a device according to the second aspect of the invention in a longitudinal section
  • Fig. 4 shows a variant of the example of Figure 3 with linearly adjustable wall elements.
  • FIG. 1 illustrates in a schematic representation the basic structure of a device 1 according to the invention according to the first aspect for fiber injection molding of injection-molded parts.
  • the device uses the operating principle of a common injection molding process for plastifiable thermoplastics and comprises an injection mold 2 for this purpose.
  • a first and a second inlet 3a, 3b are provided on the front side into which a first one designated 1a Partial volume flow or designated with 1 1 b second partial flow of plastic to be plasticized in liquid form in the interior of the injection mold 2 is injected. This can be done using one or more suitable, not shown in Figure 1 injection units.
  • FIG. 1 illustrates in a schematic representation the basic structure of a device 1 according to the invention according to the first aspect for fiber injection molding of injection-molded parts.
  • the device uses the operating principle of a common injection molding process for plastifiable thermoplastics and comprises an injection mold 2 for this purpose.
  • a first and a second inlet 3a, 3b are provided on the front side into which a
  • a first housing wall section 4a and a second housing wall section 4b substantially opposite the first housing wall section 4a, which are both part of the injection mold 2 and bound an interior space 7 of this injection mold 2, can also be seen.
  • the two housing wall sections 4a, 4b may also be provided adjacent to each other in the same housing wall (not shown).
  • the two inlets 3 a, 3 b can lie substantially opposite one another with respect to an extension direction E of the inner space 7.
  • the two inlets 3 a, 3 b may face each other with respect to an extension direction E of the inner space 7.
  • the two inlets 3a, 3b are provided on opposite end-side housing walls. By a virtual connecting line between the two end-side housing walls thus an extension direction E of the interior 7 is defined.
  • the introduced through the first inlet 3a into the injection mold 2 plastic 1 1 a thus meets within the injection mold 2 on the introduced through the second inlet 3b in the injection mold 2 plastic 1 1 b.
  • the first flow front 18a of the plastic 11a strikes the flow front 18b of the plastic 11b so that a weld line 10 is formed in this region.
  • Essential to the invention is a first through-opening 5a provided in the first housing wall section 4a, which is enclosed by a first actuator-receiving element 6a on a side remote from the interior 7 of the injection mold 2. As the longitudinal section of Figure 1 reveals, this may be formed in the manner of a receiving tube 8a. In this case, the actuator receiving element 6a projects obliquely away from the first housing wall section 4a.
  • a second through-opening 5b is provided in the second housing wall section 4b, which in turn is bordered by a second actuator-receiving element 6b on one side of the housing wall section 4b facing away from the interior 7 of the injection mold 2. This may also be formed in the manner of a receiving tube 8b. Regardless of its chosen geometric shape and the second actuator-receiving element 6b is in an oblique direction from the second housing wall portion 4b away.
  • the two passage openings 5a, 5b can be arranged offset in the first and second housing wall sections 4a, 4b along the extension direction E.
  • the actuator receiving elements 8a, 8b can protrude at a right angle from the respective housing wall section 4a, 4b.
  • the first receiving tube 8a extends along a first tube direction Ri, the second receiving tube 8b along a second tube direction R 2 .
  • the two pipe directions Ri, R 2 run parallel to each other.
  • the first and the second pipe direction Ri, R 2 each form an acute angle ⁇ with the direction of extent E.
  • the angle ⁇ is between 10 ° and 45 °; However, all acute angles ⁇ 90 ° are generally considered. In one variant, the values of the two angles may also differ from each other.
  • the first actuator-receiving member 6a a first actuator element is arranged movable along the pipe direction R 9a, and the second actuator receiving element 6b corresponding to a second actuator element 9b along the pipe direction R.sub.2.
  • the actuator elements 9a, 9b generate turbulence or cross flows in the liquid plastic 11 introduced into the injection mold 2 in the region of the weld line 10 forming between the two plastic streams 11a, 11b. These are indicated schematically in Figure 1 by the designated by the reference numeral 12 arrows. Said turbulence or transverse flows prevent an undesirable, strength-reducing orientation of the fibers of the plastic 1 1 in the region of the weld line 10 during the solidification of the plastic melt.
  • FIG. 1 further shows that the two actuator elements 9a, 9b in the respective actuator receiving element 6a, 6b are adjustable between a first position, in which they partially protrude into the injection mold 2, and a second position, in which they are completely in the respective one Actuator receiving element 6a, 6b are arranged.
  • the first actuator element 9a is thus in the first position, while the second actuator element 9b is in the second position.
  • a local displacement of the introduced into the injection mold 2 plastic 1 1 is effected.
  • the already explained cross flows (arrows 12) are generated in the region of the weld line 10.
  • eddy currents can be generated in a particularly pronounced form, by the two actuator elements 9a, 9b alternately and gegentechnisch between the first and the second position back and forth to be moved.
  • a coupling device 15 which may have a conventional control unit 16, for example, in the manner of a microcontroller, which in turn serves to control the two actuator elements 9a, 9b.
  • the two actuator elements 9a, 9b are controlled by the control unit 16 of the coupling device 15 electrically / electronically via control lines 17a, 17b.
  • the device 1 can optionally be equipped with a tempering device 13, which allows a variation of the introduced into the injection mold 2 plastic. This allows a cyclical heating of the injection mold 2 and thus also injected into the injection mold 2 liquid plastic 1 1, 1 1 a, 1 1 b, so that its temperature between its - material-specific - set melting and demolding temperature.
  • a tempering device 13 allows a targeted variation of the temperature of the plastic 11 to those skilled in the art of injection molding under the term "variothermic process control" and leads in particular in the region of the weld line 10 to an improved strength of the plastic 11.
  • the temperature control device 13 may also have a heating device 14, which is indicated only schematically in the figure and integrated into the injection mold 2, which heating device may be realized, for example, in the manner of a conventional electrical resistance heater.
  • a heating device 14 With suitable confi- guration of the heater 14 can be dispensed with a separate cooling device to cool the injection mold 2 and thus also the plastic 1 1 again; in this case, it is sufficient to achieve the required reduction in temperature by turning off the heater 14.
  • the desired temperature of the injection mold 2 and thus of the injected plastic 1 1 - alternatively or in addition to an electric heater - can be realized by integration of an oil circuit, not shown in Figure 1 in the injection mold 2.
  • the desired temperature in the injection mold 2 is achieved by thermal interaction with the same acting as a heating and cooling agent and the oil circuit flowing oil.
  • another suitable fluid can also be used as the heating or cooling agent.
  • the two receiving tubes 8a, 8b can each have a circular or oval or polygonal profile in a cross section defined orthogonally to the respective tube direction R, or R 2 , which is roughly sketched in FIGS. 2a-c. While receiving tubes 8a, 8b having a circular or oval profile (compare Figures 2a, 2b) are relatively simple and inexpensive to produce, an embodiment with the polygonal profile shown in Figure 2c has an improved mixing effect on the liquid plastic. In principle, the desired mixing increases with increasing number of profile corners 19.
  • FIG. 3 illustrates in a schematic representation the basic structure of a device V according to the invention for fiber injection molding of injection-molded parts according to the second aspect of the invention.
  • the device uses the operating principle of a common injection molding process for plastifiable Thermoplastics and includes for this purpose an injection mold 2 '.
  • a first and a second inlet 3a', 3b ' are provided in the injection mold 2 '.
  • the plastic to be plasticized is injected into the interior of the injection mold 2 using suitable injection units, not shown in FIG. 3, in liquid form.
  • a first housing wall section 4a and a second housing wall section 4b 'diametrically opposite the first housing wall section 4a in the example scenario of FIG. 3 can also be seen.
  • Both housing walls 4a ', 4b' are part of the injection mold 2 'and thus limit their interior 7' partially.
  • the two housing wall sections 4a ', 4b' can each be part of two different housing walls which - as illustrated by way of example in FIG. 3 - are arranged at a distance from one another or are connected to one another via a common housing edge.
  • the two housing walls are part of a single common housing wall, for example when the injection mold is designed in the manner of a hollow cylinder and said housing wall is a peripheral wall of such a hollow cylinder.
  • the two housing wall sections can be provided in the same housing wall.
  • the two inlets 3a ', 3b' may face one another with respect to an extension direction E 'of the inner space 7'.
  • the two inlets 3a ', 3b' on opposite end-side housing walls 19a ', 19b' are provided.
  • a direction of extension E 'of the interior 7' is thus defined by a virtual connecting straight line between the two end housing walls 19a ', 19b'.
  • Essential to the invention is a first through-opening 5a 'provided in the first housing wall section 4a', which is closed by an adjustable first wall element 20a '.
  • the first wall element 20a ' is rotatably formed relative to the first housing wall section 4a', which is symbolized in Figure 3 by an arrow with the reference numeral 21 a '.
  • the second housing wall section 4b ' may also be provided with a second through opening 5b', which is closed by an adjustable second wall element 20b.
  • the second wall element 20b ' is rotatable relative to the second housing wall section 4b', which is represented by the arrow 21b '.
  • the first wall element 20a ' is rotatable about a first rotation axis D1', which runs orthogonal to a first wall plane E1 'defined by the first housing wall section 4a in the region of the first passage opening 5a'.
  • the second wall element is rotatable about a second axis of rotation D2 'which is orthogonal to a second wall plane E2' defined by the second housing wall section 4b 'in the region of the second through-opening 5b.
  • other angles between the axes of rotation D1 ', D2' and the wall levels ⁇ 1 ', E2' are possible.
  • the two rotatable wall elements 20a ', 20b' generate by their rotational movement during the introduction of liquid plastic 1 1 'in the region between the two plastic streams 1 1 a', 1 1 b 'forming Bindenaht 10' transverse and eddy currents, which is an advantageous Reorientation of the fibers in the plastic effect.
  • other wall elements may be provided, which is arranged in the first or second housing wall section 4a ', 4b' or another housing wall section of the injection mold 2 '.
  • the first wall element 20a ' is flush with the first housing wall section 4a' and the second wall element 20b 'is flush with the second housing wall section 4b'.
  • the first passage opening 5a ' is bordered on a side of the first housing wall section 4a' facing away from the interior 7 by a first actuator receiving element 6a 'projecting away from the first housing wall section 4a'.
  • the second passage opening 5b 'on a side facing away from the interior 7 side of the second housing wall portion 4b by a second actuator-receiving element 6b' are bordered, which protrudes away from the second housing wall portion 4b '.
  • the first actuator element 9a ' in this case comprises the first wall element 20a' and is arranged in the first actuator receiving element 6a ', whereas the second actuator element 9b' comprising the second wall element 20b 'is arranged in the second actuator receiving element 6b'.
  • the two Aktuator- receiving elements 6a ', 6b' may each be formed in the manner of a housing, which is in each case externally attached to the first and second housing wall portion 4a ', 4b'.
  • the invention-essential rotation of at least the first wall element 20a '- in the present example, even the two wall elements 20a', 20b '- is realized by a rotation of the two actuator elements 9a', 9b 'about the rotation axis D1' or D2 '.
  • the two passage openings 5a ', 5b' can, as shown in FIG. 3, be arranged offset in the first and second housing wall sections 4a ', 4b' along the extension direction E '.
  • FIG. 4 shows a variant of the example of FIG. 3, in which the first actuator element 9a 'is arranged linearly adjustable in the first actuator receiving element 6a' and the second actuator element 9b 'is linearly adjustable in the second actuator receiving element 6b'.
  • the two Aktuator- receiving elements 6a ', 6b' in the form of receiving tubes 8a ', 8b' are formed.
  • the first receiving tube 8a extends along a first tube direction RT, the second receiving tube 8b 'along a second tube direction R 2 '.
  • the two pipe directions R, R 2 > run parallel to each other.
  • the second wall element 20b ' can be dispensed with in the example of FIG. 4'.
  • further wall elements 20a ', 20b' can be provided in alternative fashion analogously to the first and second housing wall sections 4a ', 4b' or another housing wall section of the injection mold 2 '. It can also be seen from FIG.
  • the two actuator elements 9a ', 9b' are adjustable in the respective actuator receiving element 6a ', 6b' between a first position, in which they partially project into the injection mold 2 ', and a second position, in which they are completely arranged in the respective actuator receiving element 6a ', 6b'.
  • the first actuator element 9a ' is consequently in the first position, while the second actuator element 9b' is in the second position.
  • a coupling device 15 ' which may have a conventional control unit 16', for example in the form of a microcontroller, which in turn serves to drive the two actuator elements 9a ', 9b'. It is conceivable, for example, to design the two actuators 9a ', 9b' as electrical actuators, which are controlled by the control unit 16 'of the coupling device 15' electrically / electronically via control lines 17a ', 17b'.
  • the device 1 ' can optionally be equipped with a tempering device 13' which is shown both in FIG. 3 and in FIG allows a variation of the introduced into the injection mold 2 'plastic.
  • This allows a cyclical heating of the injection mold 2 and thus also of the injected into the injection mold 2 'liquid plastic 1 1', 1 1 a ', 1 1 b', so that its temperature between its - material-specifically determined - melting and demolding temperature oscillates.
  • Such a specific variation of the temperature of the plastic 11 ' is known to the person skilled in the art of injection molding under the term "variothermic process control" and leads in particular in the area of the weld line 10' to an improved strength of the plastic 11 '.
  • the tempering device 13 ' may also have a heating device 14', which is only schematically indicated in the injection mold 2 'and which may be realized, for example, in the manner of a conventional electric resistance heater Cooling device can be omitted in order to cool the injection mold 2 'and thus also the plastic 1 1' again, then it is sufficient to achieve the required reduction in temperature by switching off the heater 14 '.
  • a heating device 14' which is only schematically indicated in the injection mold 2 'and which may be realized, for example, in the manner of a conventional electric resistance heater Cooling device can be omitted in order to cool the injection mold 2 'and thus also the plastic 1 1' again, then it is sufficient to achieve the required reduction in temperature by switching off the heater 14 '.
  • the desired temperature control of the injection mold 2 'and thus of the injected plastic 11' -as alternative or in addition to an electric heater-can be integrated into the injection mold by integrating an oil circuit, not shown in the figures 2 'can be realized.
  • the desired temperature in the injection mold 2 ' is achieved by thermal interaction with the oil, which acts equally as heating and cooling medium and flows through the oil circuit.
  • another suitable fluid can also be used as the heating or cooling agent.

Landscapes

  • 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 un dispositif (1) de moulage par injection de fibre de pièces moulées par injection, - comportant une forme de moulage par injection (2) comprenant une première et une seconde partie de paroi de boîtier (4a, 4b), dans laquelle sont prévues une première et une seconde entrée (3a, 3b) pour l'introduction d'une matière plastique (11, 11a, 11b) dans un espace interne (7) de la forme de moulage par injection (2), - comportant un premier trou traversant (5a) disposé dans la première partie de paroi de boîtier (4a), qui est bordé par un premier élément de réception d'actionneur (6a) sur un côté opposé à l'espace interne (7) de la première partie de paroi de boîtier (4a), qui est éloigné de la première partie de paroi de boîtier (4a), un premier élément d'actionneur (9a) étant disposé de manière mobile dans le premier élément de réception d'actionneur (6a), - comportant un second trou traversant (5b) disposé dans la seconde partie de paroi de boîtier (4b), qui est bordé d'un second élément de réception d'actionneur (6b) sur un côté opposé à l'espace interne (7) de la seconde partie de paroi de boîtier (4b), qui est éloigné de la seconde partie de paroi de boîtier (4b), un second élément d'actionneur (9b) étant disposé de manière mobile dans le second élément de réception d'actionneur (6b).
EP15724705.7A 2014-05-30 2015-05-28 Dispositif et procédé de moulage par injection de fibre de pièces moulées par injection Withdrawn EP3148765A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014210295.2A DE102014210295A1 (de) 2014-05-30 2014-05-30 Vorrichtung und Verfahren zum Faserspritzgießen von Spritzgussteilen
DE102014210296.0A DE102014210296A1 (de) 2014-05-30 2014-05-30 Vorrichtung und Verfahren zum Faserspritzgießen von Spritzgussteilen
PCT/EP2015/061847 WO2015181296A1 (fr) 2014-05-30 2015-05-28 Dispositif et procédé de moulage par injection de fibre de pièces moulées par injection

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EP3148765A1 true EP3148765A1 (fr) 2017-04-05

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WO (1) WO2015181296A1 (fr)

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WO2021224152A1 (fr) 2020-05-05 2021-11-11 Basf Se Amélioration de l'expression dans les processus de fermentation
MX2023001017A (es) 2020-07-24 2023-03-01 Basf Se Eliminacion doble de alanina racemasa y transcomplementacion.
US20240060110A1 (en) 2020-10-07 2024-02-22 Basf Se Bacillus cell with reduced lipase and/or esterase side activities
WO2022161914A1 (fr) 2021-01-26 2022-08-04 Basf Se Procédé de fermentation à haute température et micro-organismes
BR112023027009A2 (pt) 2021-06-24 2024-03-12 Basf Se Célula hospedeira modificada de bacillus licheniformis, e, métodos para produzir um composto de interesse e para aumentar a pureza de um composto de interesse
WO2022269084A1 (fr) 2021-06-24 2022-12-29 Basf Se Cellule hôte de bacillus améliorée avec une protéine rema/remb modifiée
MX2023015455A (es) 2021-06-24 2024-02-23 Basf Se Huesped de produccion de bacillus mejorado.
WO2023117970A1 (fr) 2021-12-20 2023-06-29 Basf Se Procédé de production améliorée de protéines intracellulaires dans bacillus
WO2024146919A1 (fr) 2023-01-05 2024-07-11 Basf Se Utilisation de foldases pour améliorer l'expression hétérologue de molécules sécrétées

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JPH0773860B2 (ja) * 1990-05-10 1995-08-09 修 浜田 成形金型装置
JPH04156322A (ja) 1990-10-19 1992-05-28 Toyoda Gosei Co Ltd 成形用金型
US5538413A (en) * 1994-04-29 1996-07-23 University Of Massachusetts Lowell Apparatus for strengthening weld lines in molded parts
JP3295714B2 (ja) 1997-08-29 2002-06-24 日精樹脂工業株式会社 インサート成形方法
JP5270792B2 (ja) * 2012-12-28 2013-08-21 株式会社富士精工 射出成形装置

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