• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method and an injection molding nozzle for producing injection-molded parts made of plastic with an injection molding tool, wherein the plastic melt in the form of at least one ribbon-shaped melt strand is injected through a die slot (2) into a cavity (15) of the molding tool before the injection molded part after solidification the plastic melt is removed from the mold. In order to provide advantageous injection molding and demolding conditions, it is proposed that the plastic melt during solidification in the cavity (15) in the gate area heat is supplied and that the gate during removal of the injection molded part due to the temperature gradient between the solidified injection molded part and the plastic melt in the runner along of the nozzle slot (2) breaks off.
    公开号:AT516225A1
    申请号:T50631/2014
    申请日:2014-09-10
    公开日:2016-03-15
    发明作者:
    申请人:Haidlmair Holding Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for producing injection-molded plastic parts with an injection molding tool, wherein the plastic melt is injected in the form of at least one ribbon-shaped melt strand through a nozzle slot in a cavity of the injection mold, before the injection molded part is demolded after solidification of the plastic melt, and on a Spritzgussdü¬se to carry out the process.
    In order that the plastic melt in the injection molding nozzle does not cool down in injection molding tools, it is known (DE 26 07 644 A1) to insert a nozzle nozzle-coaxial heat-conducting, heatable nozzle core in the housing of the injection nozzle having a circular nozzle opening so that it expands in a conical tip between the housing and the conical tip of Dü¬senkerns results in a tapered in the flow direction, annular, in the circular nozzle opening of the housing ausmündender nozzle channel for the plastic melt. A disadvantage with such injection-molding nozzles is that the achievable melt throughput is limited, because an increase in the flow rate leads to greater shear stress of the plastic melt in the nozzle channel and thus to additional heating of the plastic melt with the risk of material damage. If, on the other hand, the nozzle opening is enlarged, higher melt temperatures in the center region of the nozzle opening must be expected, resulting in uneven solidification of the melt stream introduced into the cavity of the molding tool, which may entail not only sacrifice of the quality of the injection molded part but also difficulties in the breakaway behavior of the gate. For these reasons, a plurality of injection molding nozzles are used for the production of larger-volume injection-molded parts, which require a comparatively complex control and possibly increase the risk of Auftre¬tens of weld lines in the joint area within the cavity of meeting melt flows, so on the one hand with a material damage in Be ¬ rich the weld lines and on the other hand with a deterioration of the optical appearance of the molded parts must be expected.
    In order to be able to inject the plastic melt, in particular for plate-shaped injection-molded parts, into the cavity of the forming tool in a stream adapted to the shape of the injection-molded parts, the plastic melt is introduced into the cavity via a film gate in a ribbon-shaped strand. The film gate comprises a nozzle channel which widens to the length of a nozzle slot opening into the cavity. Although the melt throughput through the nozzle opening can be increased with the aid of such film gullets, the film gland solidifies with the plastic melt in the cavity, so that the film gate cast off with the injection molding part must subsequently be separated from the injection molded part.
    The invention is thus based on the object of providing a method for injecting a plastic melt into a cavity in such a way that an advantageous run-off tear can be ensured even at high melt throughputs without having to fear a deterioration in the quality of the injection-molded part.
    Starting from a method of the kind set forth, the invention achieves the stated object in that heat is supplied to the plastic melt during setting in the cavity in the sprue area and that the gate breaks off during the molding of the molded part due to the temperature gradient between the solidified injection molded part and the plastic melt in the sprue area along the nozzle slot ,
    The invention is based on the recognition that the shear stress of a plastic melt injected into a cavity through a slot die is comparable to the shear stress in a round die whose diameter corresponds approximately to the slot width. Consequently, by choosing the width of the strip-shaped melt strand, the melt throughput can be arbitrarily increased without fear of increased shear stress with the adverse effects of a temperature increase of the plastic due to this over the permissible melt temperatures. However, a prerequisite for the deboss separation during demoulding of the injection-molded part is that a corresponding temperature gradient can be ensured between the plastic melt solidified in the cooled cavity and the sprue over the entire longitudinal extent of the slit nozzle, so that the mechanical strength of the sliver depends on the temperature Plastic in the transition region from the sprue to the injection molded part in des¬sen demolding, a demolition of the sprue in the surface of the nozzle opening conditionally, without pulling strings. Such an adjustment of the temperature gradient in the transition area from the sprue to the solidified injection-molded part is achieved by heat supply for casting, in the region of which the plastic thus remains molten during the solidification of the injection-molded part in the cooled cavity. The nozzle area which otherwise forms the sprue to be demoulded is therefore part of the dilution channel of the injection-molded nozzle. The transition from the liquid melt to the solidified plastic body, which thus results in a thin layer in the area of the nozzle opening, leads to a sprue break in the surface of the nozzle opening and thus to a tear along a narrow surface area of the injection molded part, which makes reworking of the tear-off point generally unnecessary.
    In order to achieve an advantageous temperature control of the plastic melt during injection into a generally cooled cavity in accordance with the solidification temperature of the plastic used, an injection nozzle with a housing housing a heatable nozzle core, with a nozzle channel opening in a nozzle opening and tapering in the direction of flow, can be used between the housing and the nozzle core and with a distribution channel between a feed channel for the plastic melt and the nozzle channel aus¬gehen. In contrast to known injection-molding nozzles of this type, however, the nozzle opening must form a nozzle slot, wherein the nozzle channel adapted to the nozzle slot adjoins at least one distributor channel which is flow-connected to the nozzle channel via a throttle zone. Essential for an advantageous introduction of the plastic melt into the cavity of an injection molding tool via a die slot is the division of the melt stream over the length of the die slot according to rheological considerations, because only then can an enlargement of the melt throughput, which depends essentially on the slot length, be achieved. For this reason, the nozzle channel adapted to the nozzle slot is connected via a throttle zone to the distributor channel, which is preferably formed by a constrictions of the flow cross-section extending over the length of the longitudinal channel of the nozzle slot associated with the distributor channel.
    By virtue of this measure, the plastic melt supplied through a feed channel is initially distributed by means of the distributor channel via a flow section which corresponds to the length of the longitudinal section of the nozzle slot associated with the distributor channel, so that the throttle zone is supplied with plastic melt over its entire extent and ensures a distribution of the melt flow over the length of the nozzle slot corresponding to the respective rheological requirements. In addition, the temperature of the melt stream can be controlled with the aid of the heated, forming a wall of the nozzle channel nozzle core before exiting the nozzle slot, so that with such in terms of its temperature and flow distribution controlled Schmelz¬zestrom the plastic melt in an advantageous manner in the cavity of a spray ¬ Gusswerkzeugs can be introduced without having to overwork the Kunststoffsbefürchten. Accordingly, according to the invention, more plastic material can be introduced into a cavity at a constant or reduced flow rate. Lower flow velocities mean lower shear stresses on the plastic melt, which reduces the risk of material damage and depending on strength losses. Thus, the prerequisites for dimensionally accurate injection molded parts of high quality while maintaining fast cycle times are given.
    In order to divide the melt flow into the area of extent of the throttle zone transverse to the flow direction and to avoid flow dead spaces, the flow area of the distribution channel may taper in the flow direction. In addition, the flow resistance of the restriction zone may vary over the length of the portion of the die slot associated with the distribution channel. By these measures alone or in combination with each other, the flow distribution of the plastic melt emerging from the nozzle slot can be influenced.
    The distribution channel, via which the throttle zone is supplied with plastic melt, could be assigned to the housing. Simpler Konstruktionsbedingun¬gen arise, however, when the nozzle core forms the distribution channel in the form of a recess open to the housing, which creates a simple processing access because of their location on the outside of the nozzle core. In addition, the enlarged surface of the distributor channel in the area of the nozzle core has an advantageous effect on the heat transfer from the heated nozzle core to the plastic melt. The boundary of the distributor channel lying opposite the recess of the nozzle core can be formed by the housing, but also by a housing insert.
    If the nozzle channel surrounds the nozzle core on all sides, a more uniform temperature distribution of the plastic melt can be achieved, in particular in the end regions of the nozzle slot. In addition, an improved guidance of the melt stream results in the end regions of the nozzle slot, which entails an increase in quality for the injection-molded part to be produced.
    For a better division of the melt flow over the entire extent of the restriction zone of the throttle zone, the nozzle channel can be connected to at least two distribution channels, via which the plastic melt can be divided more precisely. This is especially true for the melt supply of each other with respect to the longitudinal axis of the nozzle slot opposite longitudinal sides of the nozzle core, which can then have on opposite longitudinal sides each one connected via a Drossel¬zone to the nozzle channel distribution channel.
    The uniform loading of the throttle zone in the butt region between two distribution channels can be improved by connecting the distribution channels at their flow ends. This measure also helps to avoid the formation of other possible sutures due to such a bump area. In addition, different plastics can be injected via a common injection molding nozzle into the cavity of an injection molding tool via two or more distribution channels.
    In order to improve the outflow conditions of the plastic melt from the nozzle slot, the nozzle core in the region of the nozzle channel can form an inlet section adjoining the restrictor zone and a downstream outlet section facing away from the inlet section a smaller angle of inclination to the nozzle outlet direction. The outlet section provides a guide surface for the plastic melt, which is thus deflected in the outflow direction of the nozzle slot.
    The housing of the injection molding nozzle, together with the outer surface having the nozzle slot, forms a molding surface of the injection molding tool which delimits the cavity and therefore has to be cooled, at least in this outer area, particularly in the case of cooled injection molding tools. Since heat is introduced into the plastic melt via the nozzle core, it is advisable to provide the housing with a heat insulation with respect to the heated nozzle core, which has an effect not only on the energy budget, but also advantageously on the temperature profile within the melt flow with the result in that under certain circumstances the injection pressure can be reduced.
    In order to be able to exert constructive influence on the gate break, the nozzle core for closing the nozzle slot can be displaceably mounted in the housing and connected to a corresponding actuator, so that after filling the cavity with plastic the nozzle slot is closed and thus the sprue is sprayed Casting can be separated. In addition, the residence time of the injection molded part in the cavity can be shortened, since the solidification of the plastic melt in the region of the nozzle opening need not be awaited.
    As already mentioned, the temperature of the injection molding tool is preferably controlled in accordance with the solidification temperature of the plastic used in each case, so that the plastic melt injected into the cavity solidifies to the injection molded part while maintaining short cycle times. The solidification profile of the plastic melt in the region of the nozzle slot is of particular importance with regard to the abutment. For this reason, the housing in the area of the nozzle slot can be cooled with the effect that a desired temperature gradient between the solidified injection-molded part and the molten gate adjusts in the area of the nozzle slot.
    Particularly favorable design conditions arise when the housing forms a mold plate delimiting the cavity of the injection molding tool, because in this case there is no need to make the housing as a flush insert for a mold plate. In addition, a mold plate forming the housing for the injector promotes uniform temperature control of the injection molding tool.
    In order to be able to increase the throughput of melt through an injection nozzle with a limited supply of space without increasing the shear loads, the nozzle slot and the nozzle channel opening out into the nozzle slot may have several preferably star-shaped branches, so that the length of the nozzle slot determining the melt throughput the slot division is extended into several branches, with a limited space requirement for the housing.
    If the nozzle core has a circular-cylindrical basic shape with two roof surfaces symmetrical to the longitudinal axis of the nozzle slot or to the branches of the nozzle slot in the area of the nozzle channel, then advantageous design conditions known from the use of round nozzles result. The melt throughput, however, remains limited due to the given limits for the diameter of the cylindrical core body, if the nozzle slot is not divided into a plurality of branches, for example, by forming a cross slot.
    Injection molding nozzles of the present invention having a die slot may result in a design simplification of two or more cavity injection molds if at least two cavities are associated with a common die casting nozzle slot extending on both sides of a partition wall between the cavities.
    In the drawing, the subject invention is shown, for example. ShowFig. 1 is a partially torn diagram of an injection molding nozzle according to the invention,
    FIG. 2 shows this injection molding nozzle in a cross section perpendicular to the nozzle slot, FIG. 3 is a section along the line III-III of FIG. 2,
    4 shows the nozzle core in a side view,
    5 shows the nozzle core according to FIG. 4 in an end view, FIG.
    6 shows a variant of an injection molding nozzle used in an injection molding tool in a schematic cross section,
    7 is a partially torn view of a design variant of a Dü¬Senkerns in the longitudinal direction of the nozzle slot,
    8 shows the nozzle core according to FIG. 7 in a plan view, FIG.
    9 shows a construction variant of a nozzle core in a simplified diagram,
    10 shows this nozzle core in a plan view on a larger scale,
    11 shows the housing for the nozzle core according to FIGS. 9 and 10 in a sectional diagram and FIG
    12 shows an injection molding tool in the region of an injection molding nozzle extending over two cavities in a longitudinal section through the injection molding nozzle.
    The injection molding nozzle according to FIGS. 1 to 5 comprises a housing 1, which forms a nozzle slot 2, and a nozzle core 3 accommodated by the housing 1, between which and the housing 1 results in a nozzle channel 4 tapering in the flow direction, which preferably completely surrounds the nozzle core 3. For loading this nozzle channel 4 with a plastic melt, the nozzle core 3 has a central feed channel 5, to which are connected distribution channels 6 provided on the two longitudinal sides of the nozzle core 3. However, it would also be possible to feed the two distribution channels 6 not via a branch 7 of a common feed channel 5, but separately, for example, in order to be able to inject different plastics in layers.
    The Verteilerkanä¬ 6 emanating from the branch 7 of the central feed channel 5 each form two symmetrically formed, in the flow direction tapered channel branches, which are fluidly connected at their ends with the corresponding channel branches of the opposite distribution channel 6, so that the structural conditions for a the rheological requirements advantageously flow formation of the plastic melt over the entire extension region of the nozzle slot 2 are created. According to the embodiment, the distribution channels 6 are designed in the form of an opening open against the housing 1, which not only results in simple Fierstellungsbedingungen, but also a good heat transfer from the heated nozzle core 3 to the plastic melt in the region of the distribution channels 6 by the Aus¬nehmungen Enlarged surface of the nozzle core 3 ensures.
    Although the distribution of the plastic melt over the extension region of the nozzle slot 2 is necessary, it is not sufficient to be able to ensure the desired flow distribution over the longitudinal extent of the nozzle slot 2. This succeeds only when the pressurization of the nozzle channel 4 with the plastic melt supplied via the distributor channels 6 takes place via a throttle zone 8, via which the distributor channels 6 are connected to the nozzle channel 4. The throttling zone 8 is generally defined by narrowing of the flow cross-section which extends over the length of the section of the nozzle slot 2 associated with the distributor channel 6, so that the plastic melt is exposed to predetermined pressure ratios over the entire extent of the nozzle slot 2. The throttling action may be different for influencing the flow distribution over the flow cross section.
    In order to improve the flow conditions for the plastic melt emerging from the nozzle slot 2, the nozzle core 3 can form an inlet section 9 adjoining the throttle zone 8 and a downstream outlet section 10 in the area of the nozzle channel 4, which has a smaller angle of inclination than the nozzle outlet direction as the inlet section 9, as can be seen in particular the Figs. 1 and 5. Due to the lower inclination angle of the outlet section 10, the plastic melt undergoes an additional deflection in the direction of the nozzle slot 2.
    Prerequisite for a gate tear in the demolding of an injection molded part is that the plastic melt in the nozzle channel 4 does not solidify. The nozzle core 3 must therefore be heated accordingly in order to be able to supply heat to the plastic melt even in the area of the nozzle channel 4. Although heating of the nozzle core is also possible via the housing 1, more favorable heating conditions result when the nozzle core 3 is heated directly. For this purpose, according to the illustrated exemplary embodiment, electrical heating cartridges 11 are inserted into the nozzle core 3, which ensure controlled heating of the nozzle core 3. The heating cartridges 11 according to the embodiment run perpendicular to the nozzle slot 2, because of the space conditions thereby the heat input is facilitated in the tapered end portion of the nozzle core 3. However, this arrangement of the heating cartridges 11 is not mandatory. In FIG. 6, a nozzle core 3 with heating cartridges 11 extending parallel to the nozzle slot 2 is indicated. It need not be mentioned that the electrical heating can also be replaced by a heater with the aid of a heat carrier through the nozzle core 3.
    In order to reduce heat losses by a heat transfer from the plastic melt to the housing 1, the housing 1 can be shielded from the nozzle core by a thermal insulation 12, which advantageously forms the housing-like wall of the distribution channels 6 at least in sections. This heat insulation, which surrounds the nozzle core 2 in the form of a jacket, does not need to be produced from a heat-insulating material itself. It is durch¬aus possible to hinder the heat transfer from the per se a poor heat conductor forming plastic melt on the housing 1 by a regional air gap between the thermal insulation 12 and the housing 1, spielsweise in that the outer surface of the insulation 12 with a ripening is provided.
    In contrast to the embodiment according to FIGS. 1 to 5, according to the exemplary embodiment according to FIG. 6, the nozzle core 3 is displaceably mounted in the housing 1 for closing the nozzle slot 2. To adjust the nozzle core 3 in the in Figs. 6 drawn closed position serves an actuator 13, which is formed in the embodiment in the form of a wedge gear 14. In addition, the housing 1 is formed by a molding plate 16 delimiting the cavity 15 of an injection molding tool, so that a separate housing for the injection molding nozzle to be inserted into such a molding plate 16 is unnecessary.
    In FIGS. 7 and 8, a particularly advantageous embodiment of a nozzle core 3 is shown because the circular-cylindrical basic shape of this nozzle core 3 is that of a
    Round nozzle corresponds. Due to the circular cylindrical basic shape Ein¬ simpler sealing conditions. In order to ensure a nozzle channel 4 that opens out into a nozzle slot 2, the cylindrical nozzle core 3 in the area of the nozzle channel 4 is provided with two roof surfaces 17 that are symmetrical with respect to the longitudinal axis of the nozzle slot 2 and delimit the nozzle channel 4. The supply of melt takes place via a central feed channel 5 with a branch 7, to which the distribution channels 6 connect. The length of the nozzle slot 2 is naturally limited to the diameter of the nozzle core 3 in such a configuration of the nozzle core 3.
    In order to increase the melt throughput despite the spatial restriction given by the housing 1, the nozzle slot 2 and the nozzle channel 4 opening out into the nozzle slot 2 can have a plurality of branches 18 between the housing 1 and the nozzle core 3, as shown in FIGS. 9 to 11 is illustrated. According to the embodiment according to FIG. 11, the housing 1 forms the nozzle slot 2 in the form of a cross slot with four branches 18 extending from a center. In FIG. 10, the nozzle slot 2 is indicated with its four branches 18 connecting one cross slot in its position in relation to the nozzle core 3 in a dash-dot fashion. 9 and 10 in the region of the nozzle channel 4 are provided in pairs with each branch 18 of the nozzle slot 2 associated roof surfaces 17, which terminate in a cross-shaped edge corresponding to the cross shape of the nozzle slot 2. Between the roof surfaces 17 of the nozzle core third and corresponding Gegenflä¬ 19 of the housing 1 results in inserted into the housing 1 nozzle core 3 of the cross-slot opening out nozzle channel 4, the sections in the Dü¬senkern 3 shaped distribution channels 6 are assigned to on opposite sides of the nozzle core 3 on each branch 7 are connected to a Speiseka¬nal 5. By way of corresponding cross-sectional constrictions, rekeiling of the nozzle channel 4 via a throttle zone is provided, which however is not shown in greater detail for reasons of clarity. The heating of the nozzle core 3 via a heating cartridge 11th
    If an injection molding tool has a plurality of cavities 15 separated from one another by a dividing wall 20, as is indicated in FIG. 9, the cavities 15 separated from one another by a dividing wall 20 can be acted upon by a common injection nozzle whose nozzle slot 2 is shown in FIG. 9 extends on both sides of the partition wall 20. With regard to the distribution of the plastic melt over the extension region of the nozzle slot 2, consideration must be given to the course of the dividing wall 20.
    Due to the incorporation of the plastic melt into the cavity 15 of an injection molding tool via a nozzle slot 2, the shear stress of the plastic melt in relation to the possible melt throughput can be kept relatively small, which is an essential prerequisite for a material-gentle injection of the plastic melt into the cavity 15 is. The demolition of the gate depends on the strength properties of the plastic present in the region of the nozzle slot 2, which is solid during demoulding within the cavity 15 but molten in the casting area, so that a high temperature gradient within the transitional area from the cavity 15 to the nozzle channel 4 a thin layer in the region of the nozzle slot 2 results, whereby the conditions for a demolition of the sprue are given along the tuned by the opening of the nozzle slot 2 surface. For this purpose, it is advisable to cool the housing in the area of the nozzle slot 2. In FIGS. 1, 2 and 6, cooling channels 21 are indicated for this purpose. It can thus be laid with appropriate choice of the influencing parameters, the tear surface in the molding surface of the respective injection molded part, without that it requires a post-processing of Angussabrisses. The sprue is thus laid in the area of the hot runner.
    Particularly advantageous demolding conditions result in this Zusam¬menhang according to FIG. 6, if there is the possibility to close the nozzle slot 2 by means of the nozzle core 3.
    权利要求:
    Claims (17)
    [1]
    1. A method for producing plastic injection-molded parts with an injection molding tool, wherein the plastic melt is injected in the form of at least one band¬förmige melt strand through a nozzle slot (2) in a cavity (15) of the injection mold before the injection molded part after Erstar¬ren the plastic melt during the solidification in the cavity (15) in the sprue area, heat is removed and the sprue is demolished during demoulding of the injection molded part due to the temperature gradient between the solidified injection molded part and the plastic melt in the sprue area along the die slot (2).
    [2]
    2. Injection molding nozzle for introducing a plastic melt into a cavity (15) of an injection molding tool with a housing (1) receiving a heatable nozzle core (3), with a nozzle channel (4) opening in a nozzle opening and tapering in the direction of flow between the housing (1 ) and the nozzle core (3) and with a distribution channel (6) between a feed channel (5) for the plastic melt and the nozzle channel (4), characterized in that the nozzle opening forms a nozzle slot (2) and that at the Düsen¬schlitz ( 2) adapted nozzle channel (4) at least to a distribution channel (6) adjoins the strömungsverbun¬den with the nozzle channel (4) via a throttle zone (8).
    [3]
    3. Injection molding nozzle according to claim 2, characterized in that the Dros¬selzone (8) forms over the length of the distributor channel (6) associated Längs¬abschnitts the nozzle slot (2) extending constriction of Strömungsquer¬schnitts.
    [4]
    4. Injection molding nozzle according to claim 2 or 3, characterized in that the flow cross section of the distributor channel (6) tapers in the flow direction.
    [5]
    5. Injection molding nozzle according to one of claims 2 to 4, characterized in that the flow resistance of the throttle zone (8) over the length of the distribution channel (6) associated longitudinal portion of the nozzle slot (2) changes.
    [6]
    6. Injection molding nozzle according to one of claims 2 to 5, characterized in that the nozzle core (3) forms the distribution channel (6) in the form of a against the housing (1) open recess.
    [7]
    7. Injection molding nozzle according to one of claims 2 to 6, characterized in that the nozzle channel (4) surrounds the nozzle core (3) on all sides.
    [8]
    8. Injection molding nozzle according to one of claims 2 to 7, characterized in that the nozzle channel (4) is connected to at least two distribution channels (6).
    [9]
    9. Injection molding nozzle according to claim 8, characterized in that the distributing channels (6) are connected to one another at their ends of flow.
    [10]
    10. Injection molding nozzle according to one of claims 2 to 9, characterized in that the nozzle core (3) in the region of the nozzle channel (4) to the throttle zone (8) adjoining the inlet section (9) and a downstream, opposite the inlet section (9) has a smaller Inclination angle to the Düsenausströmrichtung having outlet portion (10) forms.
    [11]
    11. Injection molding nozzle according to one of claims 2 to 10, characterized gekennzeich¬net that the housing (1) has a thermal insulation (12) opposite the heated nozzle core (3).
    [12]
    12. Injection molding nozzle according to one of claims 2 to 11, characterized gekennzeich¬net that the nozzle core (3) for closing the nozzle slot (2) is slidably mounted in the housing (1).
    [13]
    13. Injection molding nozzle according to one of claims 2 to 12, characterized gekennzeich¬net that the housing (1) in the region of the nozzle slot (2) is cooled.
    [14]
    14. Injection molding nozzle according to one of claims 2 to 13, characterized gekennzeich¬net, that the housing (1) forms a cavity (15) of the injection molding tool begren¬zende mold plate (16).
    [15]
    15. Injection molding nozzle according to one of claims 2 to 14, characterized gekennzeich¬net that the nozzle slot (2) and in the nozzle slot (2) Ausmündende Dü¬senkanal (4) has a plurality of preferably star-shaped branches (18).
    [16]
    16. Injection molding nozzle according to one of claims 2 to 15, characterized gekennzeich¬net that the nozzle core (3) a circular cylindrical basic shape with two to the longitudinal axis of the nozzle slot (2) or the respective branch (18) of the nozzle slot (2) symmetrical Has roof surfaces (17) in the region of the nozzle channel (4).
    [17]
    17. Injection molding tool with an injection molding nozzle according to one of claims 2 to 16, characterized in that in the arrangement of two or more cavities (15) at least two cavities (15) is assigned to a common injection nozzle whose nozzle slot (2) is on both sides of a partition (20) extends between the cavities (15).
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    申请号 | 申请日 | 专利标题
    ATA50631/2014A|AT516225B1|2014-09-10|2014-09-10|Method and injection molding nozzle for producing plastic injection-molded parts|ATA50631/2014A| AT516225B1|2014-09-10|2014-09-10|Method and injection molding nozzle for producing plastic injection-molded parts|
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    US15/510,066| US11148332B2|2014-09-10|2015-09-10|Injection molding nozzle for manufacturing injection molded components from plastic|
    PCT/AT2015/050225| WO2016037209A1|2014-09-10|2015-09-10|Method and injection-moulding nozzle for producing injection-moulded parts from plastic|
    PCT/EP2015/001825| WO2016037704A1|2014-09-10|2015-09-10|Injection molding nozzle for manufacturing injection molded components form plastic|
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    PT157753617T| PT3191287T|2014-09-10|2015-09-10|Method and injection-moulding nozzle for producing injection-moulded parts from plastic|
    US17/497,124| US20220024094A1|2014-09-10|2021-10-08|Method and injection-molding nozzle for producing injection-molded parts from plastic|
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